JP2019117007A - Hot water supply heating system - Google Patents

Abstract

To provide a hot water supply heating system enabling conformable bathing in a heated bathroom early in winter season.SOLUTION: In the hot water supply system 2, a controller 70 is configured to, when by executing combustion operation of a combustor 201, hot-water accumulation operation of heating water supplied from a water supply source and supplying the water to a bathtub 50 is executed while heating operation of a heater 401 for supplying warm air to the inside of a bathroom, execute control of supplying to the heater 401 heat of the water heated by the combustor 201, and supplying residual heat after supply to the heater 401 to the water in the bathtub 50.SELECTED DRAWING: Figure 19

Description

  The present invention relates to a hot water supply and heating system, and more particularly to a hot water supply and heating system having a hot water supply function, a reheating function, a heating function, and a heat storage function.

  Patent Document 1 discloses a bath apparatus with a heating function. The bath apparatus with a heating function described in Patent Document 1 has a function of heating the bathroom while dropping and repelling hot water into the bathtub. In such a bath apparatus with a heating function, the time required for pouring a bath in the bath and the time required for reheating it, and the time required for heating by the heating system of the bathroom to bring the interior of the bathroom to a comfortable temperature, It may be different from one another.

  For example, when the user tries to take a bath in a heated bathroom in winter, the appliance can perform the filling operation and the repelling operation of the bathtub at maximum capacity. On the other hand, for bathroom heating systems, the maximum capacity of the heating system may be rate-limiting. Then, it takes time to bring the bathroom to a comfortable temperature.

  For this reason, even in the winter, for example, even if the bathing operation of the bathtub and the reheating operation of the bathtub are finished and the bathtub is ready for bathing, the bathroom may not be heated to a comfortable temperature by the heating device. . On the other hand, even if the bathroom is at a comfortable temperature due to the heating device, the user can not take a bath unless the bathing operation of the bathtub and the reheating operation of the bathtub end. Thus, there is a problem that it takes time to prepare for a comfortable bath in a heated bathroom in winter.

Patent No. 3620357

  The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a hot water heating system which can bath comfortably in an early heated bathroom in the winter.

  According to the present invention, the above object is achieved by a tank unit having a tank for storing water supplied from a water supply source, a gas boiling unit having a combustion device for heating the supplied water by combustion of a burner, and a heat medium A heat pump section for circulating heat between the heat medium and the supplied water, a heat pump circuit for circulating heat, water from at least one of the combustion device and the heat pump section, and a bath, Pipe of a bathtub system for circulating water, a pipe of a heating system including a system turn for circulating water by connecting at least one of the combustion apparatus and the heat pump section, and a heating apparatus, the tank section, and the gas boiling water Control device for controlling the operation of the heat pump unit and the heat pump unit, and the control device executes a combustion operation of the combustion device to perform warm air inside the bathroom The heat of the water heated in the combustion device is added to the heating device when heating the water supplied from the water supply source while performing the heating operation of the heating device to be supplied and supplying the water to the bathtub. A hot water supply heating system is characterized by performing control to supply a heating device and supplying the remaining heat after being supplied to the heating device to the water inside the bathtub.

  According to the above configuration, the control device performs the heating operation of the heating device by performing the combustion operation of the combustion device, and performs the filling operation while performing the heating operation of the heating device, the heating device heats the heat of the water heated in the combustion device And supply the remaining heat after being supplied to the heating system to the water inside the bath. Therefore, more heat can be preferentially supplied to the heating device as compared to the bathtub. Therefore, the user can bathe comfortably in the warm bathroom early by performing the filling operation of the bath while heating the bathroom using a large amount of heat supplied preferentially by the control device. In addition, the control device performs the bathing operation of the bathtub while heating the bathroom with the heating device. Therefore, it is possible to perform heating of the bathroom which takes more time compared to the bathing time continuously at the time of the bathing operation, and the user baths comfortably in the bath heated early in the winter season Can. Furthermore, since the remaining heat is supplied to the water inside the bath after the heat of the water heated in the combustion apparatus is supplied to the heating apparatus, the flow of water flowing through the pipe of the heating apparatus according to the above configuration is: The normal heating operation reverses the pipeline of the heating system to the flow of water. Therefore, for example, even if foreign matter such as dust contained in the water inside the bathtub adheres to the pipe of the heating device during the normal heating operation, the foreign substance adhering to the pipe of the heating device is It can be discharged to the outside of the heating device at the time of filling operation. Therefore, the heating device can be kept clean.

  Preferably, the gas boiling portion is a cistern connected to the heating device, which stores water inside and functions as a reservoir for removing air, a forward pipe connected to the bathtub, and the bathtub connected to the bathtub And the return pipe different from the forward pipe, and the control device guides all of the water heated in the combustion device to the system and then to the heating device to pass through the heating device. It is characterized by performing control which directs water to said bathtub using said going pipe and said return pipe.

  According to the above configuration, the control unit leads all the water heated in the combustion unit to the cistern and then to the heating unit, and guides the water having passed through the heating unit to the bathtub using the forward pipe and the return pipe. Run. That is, at the time of the pouring operation, the control device guides the hot water to the bath by so-called double conveyance. Thereby, the piping resistance between the gas water heater and the bath is suppressed, and the water filling operation is completed in a shorter time. Also, all the water heated in the combustion device is led to the cistern and then to the heating device, and is further led to the bathtub through the forward pipe and the return pipe. Therefore, the temperature of the water flowing through the forward pipe is the same as the temperature of the water flowing through the return pipe. Therefore, water of temperature controlled with high precision is led to the bath by double conveyance.

  Preferably, the control device supplies the heat of the water heated by executing the heating operation of the heat pump unit to the water inside the tank to heat the water inside the tank, and the inside of the tank And controlling the mixing of the water supplied from the water supply source and the water supplied from the water supply source to the combustion apparatus.

  According to the above configuration, the control device can execute the feed water preheating operation of heating the water inside the tank by the heating operation of the heat pump unit, and also guides the water heated inside the tank to the combustion device and It is possible to carry out a heat storage pouring operation leading to the above. Thereby, a highly efficient pouring operation can be realized.

  Preferably, the gas water heater includes a bath thermistor which is provided in a pipe line of the bath system and detects a temperature of water led to the bath, and the control device starts the bathing operation. When a predetermined time based on the capacity of the pipeline disposed in the heating device has elapsed, temperature field back control based on the temperature detected by the bath-trip thermistor is performed.

  According to the above configuration, the control device starts the pouring operation and then, when a predetermined time based on the capacity of the pipeline disposed in the heating device elapses, the temperature based on the temperature detected by the bath-tripping thermistor Execute field back control. This allows water of controlled temperature to be sent to the bath with higher accuracy during the pouring operation.

  Preferably, the control device stops the combustion operation of the combustion device just before guiding the heated predetermined amount of water to the bath and ending the pouring operation, and the water supplied from the water supply source is stopped. From the water supply source, the combustion operation of the combustion device is started again at a timing based on the capacity of the pipeline going from the tank portion to the bathtub via the combustion device and the heating device while supplying to the heating device. A control is performed to heat the supplied water.

  According to the above configuration, the control device stops the combustion operation of the combustion device immediately before the completion of the pouring operation and supplies the water supplied from the water supply source to the heating device. Therefore, unheated water (cold water) is introduced to the heating device. As a result, the high-temperature water present in the heating system or the cistern is pushed out by the cold water supplied from the water supply source and led to the bath. Therefore, a highly efficient pouring operation can be realized. Also, the control device restarts the combustion operation of the combustion device at a timing based on the capacity of the pipe line (water pouring piping) going from the tank portion to the bathtub via the combustion device and the heating device, and is supplied from the water supply source. Heat the heated water. Thereby, even in the case where the high temperature water present in the heating device or the cistern is pushed by the cold water, the heated water can be disposed in the vicinity of the combustion device. Therefore, even when hot water is supplied by, for example, a shower or a water faucet, it is possible to suppress discharge of cold water from the shower or the water faucet.

  Preferably, the gas boiler includes a bath pump provided in a pipe line of the bath system and circulating water in the bath, and a water level sensor for detecting a water level in the bath, the heat pump The control unit has a defrost valve provided in a heat medium bypass pipe branched from the heat medium circulation path to adjust the pressure of the heat medium, and the control device continues the heating operation of the heat pump unit. It is characterized in that the combustion operation of the combustion device is stopped, the drive of the bath pump is stopped, the defrost valve is opened, and control to detect the water level by the water level sensor is executed.

  According to the above configuration, the control device stops the combustion operation of the combustion device while stopping the heating operation of the heat pump unit, stops the drive of the bath pump, opens the defrost valve of the heat pump unit, and the water level sensor Control to detect the water level inside the bathtub. Thereby, even when the operation of the hot water supply and heating system is switched from the pouring operation to the reheating operation, the heating operation of the heat pump unit is continued. Therefore, it can suppress that the efficiency of a heat pump part falls. In addition, the control device stops the combustion operation of the combustion device, stops the driving of the bath pump, and opens the defrost valve of the heat pump unit, whereby the movement of water in the pipe can be suppressed. Thus, the water level sensor can detect the water level inside the bathtub with high accuracy.

  Preferably, the gas boiler includes a liquid heat exchanger on the heating side which supplies the heat of the water heated in the combustion device to the heating device, and the control device is the water heated in the combustion device. Is led to the liquid heat exchanger on the heating side and then led to the inside of the tank, and the heated water is led to the bath by mixing the water inside the tank and the water supplied from the water source. It is characterized by performing control.

  According to the above configuration, the control device leads the water heated in the combustion device to the liquid heat exchanger on the heating side and then leads it to the inside of the tank. Thus, the water inside the tank is heated by the high temperature water supplied from the combustion device through the liquid heat exchanger on the heating side. The controller then directs the heated water to the bath by mixing the water inside the tank with the water supplied from the water source. Therefore, more heat can be preferentially supplied to the heating device as compared to the bathtub. Therefore, the user can bathe comfortably in the warm bathroom early by performing the filling operation of the bath while heating the bathroom using a large amount of heat supplied preferentially by the control device. Also, the control device can mix relatively high temperature water and relatively low temperature water to control the temperature of the water introduced into the bath. As a result, it is possible to guide the water of the temperature controlled with high accuracy to the bath, and to suppress the time lag generated between the control temperature and the actual temperature of the water (detected temperature).

  ADVANTAGE OF THE INVENTION According to this invention, the hot-water supply heating system which can be comfortably bathed in the bathroom heated early can be provided.

It is a top view showing the hot-water supply heating system concerning a 1st embodiment of the present invention. It is a piping diagram showing the hot water supply heating system concerning this embodiment. It is a figure explaining the water supply preheating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the hot-water supply operation | movement and the thermal storage utilization hot-water supply operation of the hot-water supply heating system which concern on this embodiment. It is a figure explaining drain discharge operation of a hot-water supply heating system concerning this embodiment. It is a figure explaining drain discharge operation of a hot-water supply heating system concerning this embodiment. It is a figure explaining the 1st pouring operation and heat storage pouring operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the 2nd filling operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the 1st reheating operation | movement of the hot-water supply heating system which concerns on this embodiment. It is a figure explaining the 2nd reheating operation | movement of the hot-water-supply / heating system which concerns on this embodiment. It is a figure explaining the 3rd reheating operation | movement of the hot-water supply heating system which concerns on this embodiment. It is a figure explaining the hot water pump heat pump part collection | recovery operation | movement of the hot-water supply heating system which concerns on this embodiment. It is a figure explaining the bathing water heat recovery operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining low-temperature heating operation of a hot-water supply heating system concerning this embodiment. It is a figure explaining low temperature low load heating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining low temperature low load heating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the 1st high temperature heating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the 2nd high temperature heating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining high temperature heating operation and the 1st pouring operation of a hot-water supply heating system concerning this embodiment. It is a figure explaining high temperature heating operation and the 2nd pouring operation of a hot-water supply heating system concerning this embodiment. It is a piping diagram showing the hot-water supply heating system which concerns on the 2nd Embodiment of this invention. It is a figure explaining the water supply preheating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the hot-water supply operation | movement and the thermal storage utilization hot-water supply operation of the hot-water supply heating system which concern on this embodiment. It is a figure explaining drain discharge operation of a hot-water supply heating system concerning this embodiment. It is a figure explaining drain discharge operation of a hot-water supply heating system concerning this embodiment. It is a figure explaining the 1st pouring operation and heat storage pouring operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the 2nd pouring operation and heat storage pouring operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the 1st reheating operation | movement of the hot-water supply heating system which concerns on this embodiment. It is a figure explaining the 2nd reheating operation | movement of the hot-water-supply / heating system which concerns on this embodiment. It is a figure explaining the 3rd reheating operation | movement of the hot-water supply heating system which concerns on this embodiment. It is a figure explaining the hot water pump heat pump part collection | recovery operation | movement of the hot-water supply heating system which concerns on this embodiment. It is a figure explaining the hot water pump heat pump part collection | recovery operation | movement of the hot-water supply heating system which concerns on this embodiment. It is a figure explaining the bathing water heat recovery operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining low-temperature heating operation of a hot-water supply heating system concerning this embodiment. It is a figure explaining low temperature low load heating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining low temperature low load heating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the 1st high temperature heating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining the 2nd high temperature heating operation of the hot-water supply heating system concerning this embodiment. It is a figure explaining high temperature heating operation and the 1st pouring operation of a hot-water supply heating system concerning this embodiment. It is a figure explaining high temperature heating operation and the 2nd pouring operation of a hot-water supply heating system concerning this embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. First, main features of the embodiments of the present invention will be listed for ease of understanding, and then the embodiments will be described in detail. explain.
In addition, since the embodiment described below is a preferable specific example of the present invention, technically preferable various limitations are added, but the scope of the present invention particularly limits the present invention in the following description. As long as there is no statement of purport, it is not limited to these modes. Further, in the drawings, the same components are denoted by the same reference numerals, and detailed description will be appropriately omitted.

[Feature 1: Miniaturization]
The hot water supply and heating system 2 of the present embodiment includes a tank unit 10, a gas boiling unit 20, a heat pump unit 30, a heating device 40, and a bath tub 50. Each of these devices is mutually connected via a pipe, various valves, and a pressure control system 237 or the like. In particular, conventionally, when the heating device 40 and the bathtub 50 are directly connected by a pipe, there is a problem that the sewage in the heating device 40 may be mixed in the bathtub water. Therefore, connecting the heating route (pipe of heating system) and the bathtub route (pipe of bathtub system) with pipes is unusual, and it was common knowledge to exchange heat using a water-water heat exchanger. .

  On the other hand, the hot water supply and heating system 2 of the present embodiment has pipes (hereinafter referred to as "common pipes") 691 and 692 (refer to the filled portion in FIG. 2) common to the heating path and the bathtub path. The heating path and the bathtub path can be changed by using the forward three-way valve (bath switching valve) 246 (see FIG. 2) and the bath return four-way valve (bath return switching valve) 249 (see FIG. 2). . Therefore, the pipe can be miniaturized because the water-water heat exchanger which takes a relatively large space is not necessary. Further, mixing of the water of the bathtub 50 with the water of the heating device 40 can be suppressed by using the three-way valve 246 and the four-way valve 249.

In addition, by controlling the excess heat or hot water present in a given device to other devices (that is, by exchanging heat), miniaturization of the device is also achieved.
Thus, the high-efficiency water heating and heating system 2 can be used even in an apartment or a small house with a small space.
And, by connecting each device with a pipe or the like as described above, hot water can flow between the devices. As a result, "improvement of functionality,""improvement of efficiency,""improvement of comfort," and "cost reduction" can be further achieved. This will be described below.

[Feature 2: Improvement of functionality]
In the present embodiment, the functionality is improved.
For example, the hot water supply / heating system 2 according to the present embodiment sends the heat of the remaining hot water by sending the remaining hot water or the like of the bathtub 50 to the heat exchanger (plate heat exchanger in the case of FIG. 2) 103 of the tank unit 10. The tank unit 10 has a "bath water heat recovery function" that can be recovered. According to this function, it is possible to save the waste of energy, to create warm water in the tank unit 10, and to cool the remaining hot water of the bath 50 to suppress the proliferation of bacteria. And, in the present embodiment, the hot water heat recovery function is improved. For example, the hot water of the bathtub 50 is sent to the heat pump unit 30, the heat is recovered by the heat pump unit 30, the waste heat generated from the heat pump unit 30 is added during cooling, and then the hot water is sent to the tank unit 10. . Thereby, the heat recovery function in the tank unit 10 is improved.

  In addition, the tank unit 10 according to the present embodiment is small enough to be accommodated, for example, on a pipe shaft of an apartment. Therefore, when the hot water in the tank unit 10 reaches a predetermined temperature, the hot water is circulated to another device and used, and the tank unit 10 is made ready to generate new hot water one after another. In this way, the same function as a large hot water storage tank is exhibited. For example, the hot water supply and heating system 2 according to the present embodiment has a “waste heat recovery function” that generates hot water in the tank unit 10 using the waste heat at the time of the cooling operation of the heat pump unit 30. At the time of this waste heat recovery, when the hot water of the tank unit 10 reaches a reference temperature when the water filling reservation is made, the hot water of the tank unit 10 is sent to the bathtub 50 first. Then, when the hot water in the tank unit 10 drops to a predetermined amount, the operation of generating hot water in the tank unit 10 again using the waste heat recovery function and sending the hot water again to the bathtub 50 is repeated. As a result, even in the small-sized tank unit 10, the bathtub 50 can be filled with a predetermined amount of water.

[Feature 3: Improvement of efficiency]
Next, in the present embodiment, the efficiency of each device is improved.
For example, the efficiency improvement at the time of starting of the heat pump part 30 is aimed at. That is, when the heat pump unit 30 is stopped, the outdoor gas heat exchanger 303 becomes a cooler, and the heat medium (for example, R290, R32) in the gas heat exchanger 303 becomes liquid. In this case, it takes time for the next start and the efficiency is degraded. Therefore, the structure or control for preventing the liquefaction of the heat medium in the gas heat exchanger 303 is adopted to improve the efficiency of the heat pump unit 30. As means for preventing liquefaction of the heat medium, in the present embodiment, in order to increase the amount of heat medium to be liquid in the first liquid heat exchanger 301 prior to the stop of the heat pump unit 30, the first liquid heat The residual heat of the exchanger 301 is circulated to the tank unit 10, and the pressure in the heat medium circulation path 351 in the first liquid heat exchanger 301 and its periphery is lowered than that of the gas heat exchanger 303, and the heat medium is a gas. A method of controlling so as not to go to the heat exchanger 303 is used. Thereby, the liquefaction of the heat medium in the gas heat exchanger 303 is prevented, and the efficiency at the start of the heat pump unit 30 is improved. Furthermore, the hot water of the tank unit 10 can also be generated efficiently.

  Further, in the present embodiment, the efficiency is also improved by suppressing the amount of natural heat radiation in the conduit. That is, when the respective devices are connected by pipes as described above, the pipes used before the switching are not used along with the switching of the path of the pipe through which the hot water flows. And hot water may remain there. Therefore, when switching the pipe path, control is performed so that hot water does not remain in the predetermined pipe where the hot water remains, or even if the hot water remains in the predetermined pipe, the hot water is sent out and the path is switched. ing. As a result, it is possible to prevent a situation in which the hot water is left behind in the pipe, eliminate waste, and improve the efficiency.

Further, in the present embodiment, by sending a low temperature liquid (hot water) to the heat pump unit 30, it is possible to increase the efficiency of the heat pump unit 30, which is highly efficient to operate at full power.
For example, since heating is insufficient only with the heat pump unit 30, when heating using both the heat pump unit 30 and the gas boiling unit 20, the heat pump unit 30 first heats. Thereafter, in order to apply a predetermined amount of heat, heating is performed by the gas boiler 20. Thereby, the liquid of the low feed water temperature is fed into the heat pump unit 30, and the efficiency can be increased.

  Moreover, when keeping warm the hot water of the bathtub 50, it is ideal to keep it warm only by the heat pump part 30 in consideration of efficiency. However, when the hot water is fed into the heat pump unit 30, the high efficiency of the heat pump unit 30 is torn down. Therefore, after the hot water of the bathtub 50 is once circulated to the tank unit 10 and heat is removed by the tank unit 10 to generate warm water, a liquid with a low water supply temperature is sent to the heat pump unit 30. Thereby, the efficiency of the heat pump unit 30 can be increased.

  Further, in the present embodiment, when hot water heated only by the heat pump unit 30 is fed into the heating device 40 or the bath 50, the route is made as far as possible not through the gas boiling unit 20. As a result, it is possible to avoid the situation where the heat is naturally radiated from the bath heat exchanger 207 of the gas boiling unit 20 and to increase the efficiency.

[Feature 4: Improvement of comfort]
Next, in the present embodiment, improvement of comfort is achieved.
For example, in the present embodiment, a shower can be taken in a cool bathroom in summer. That is, by sending the water cooled by the heat pump unit 30 to the heating device 40, the bathroom can be cooled. Further, the heat generated when the heat pump unit 30 is cooled can be recovered by the tank unit 10 to generate hot water. And when the temperature of the hot water of the tank part 10 is lower than predetermined temperature, a deficit can be heated with the gas boiling part 20, and this heated hot water can be used as a shower.

  Further, in the present embodiment, it is possible to take a bath in a warm bathroom by simultaneously ending heating and remembrance of the bathroom, which normally does not end at the same time because the target set temperature and the like differ. In addition, it is possible to prevent strokes and heart attacks that occur due to differences in temperature. That is, in the present embodiment, the hot water heated by the gas boiling unit 20 is distributed to both the heating path to the heating device 40 and the trace path to the bathtub 50. At this time, the hot water after passing through the heating device 40 is mixed while being controlled to the path of remembrance. As a result, the heating end time and the memorial end time can be synchronized without sending hot water which may cause burns to the bath 50.

  The hot water temperature is also lowered gradually by feeding hot water in the order of the gas boiling unit 20, the heating device 40, and the bathtub 50 by reversing the normal supply route of hot water from the gas boiling unit 20 to the heating device 40 in this respect. To go. Therefore, it is possible to synchronize the heating end time and the memorial end time without feeding the hot water which may cause burns to the bathtub 50. Furthermore, in this case, when hot water is sent from the heating device 40 to the bathtub 50, the hot water is fed to the bathtub 50 by both the bath transfer pipes 621, 622 and the bath return pipes 623, 624, and the shortest bathing is possible.

[Feature 5: Avoiding troubles]
As described above, in the embodiment of the present invention, “miniaturization”, “functional improvement”, “efficiency improvement”, and “comfortability improvement” are intended, but such configuration and / or control is performed. As a result, various problems may occur. Therefore, in the present embodiment, further configuration or control is performed to avoid the trouble.

  For example, as described above, the present embodiment has the “bath water heat recovery function” of recovering the heat of the residual hot water of the bath 50 by the tank unit 10. A regulating valve is provided in the bath water heat recovery path so that the cistern 237 does not exist. This prevents hot water from overflowing from the open type cistern 237 and prevents the pipe shaft of an apartment housing the cistern 237, a corridor leading thereto, etc. from getting wet.

  Moreover, when the heat pump unit 30 is installed in the pipe shaft of the apartment, if the generated drain water is discharged as it is like a normal outdoor unit, there is a possibility that the corridor or the like gets wet through the pipe shaft. In this respect, in the present embodiment, the heat pump unit 30 and the drainage port of the bathroom are connected by a pipe so that the generated drain water is drained into the drainage port.

  Further, in the present embodiment in which the respective devices are connected to each other, the possibility that Legionella bacteria or the like generated in devices other than the bathtub 50 may be mixed in the bathtub water is prevented. For example, when the predetermined device is not used (for example, in spring or autumn when the heating device 40 is not used), stagnant water may be generated in the device and a pipe around the device, and bacteria may be generated there. On the other hand, when there is an apparatus and pipe which has not been used for a certain period of time, or when it is assumed, drainage and / or water injection in the unused apparatus and pipe is carried out to perform water replacement. In this regard, when the water replacement work is performed using the bath pump 235 in the pipeline, it takes time because there are various routes and the like. Therefore, it is preferable to water the water supplied from the Water Works Bureau into unused devices and pipes while controlling the water pressure, and to replace water in a short time.

  Further, as described above, it has the “waste heat recovery function” of storing hot water in the tank unit 10 using the waste heat at the time of the cooling operation of the heat pump unit 30. This waste heat recovery function is performed only during the cooling operation. Therefore, there is a risk that the water in the pathway for waste heat recovery may freeze in winter. Therefore, in the present embodiment, when the winter season arrives, or when the temperature falls below a predetermined reference value, control is performed so that the water in the path for waste heat recovery is automatically drained. Furthermore, after the water is drained, it is preferable to automatically pour water into the path for waste heat recovery when summer comes or when the temperature exceeds a predetermined reference value. Thereby, the cooling and waste heat recovery functions in summer can be performed without any problems.

In addition, as described above, when the automatic water supply is performed in various situations, there is a possibility that the pushed out water enters the bath and becomes submerged even though the user does not give an instruction. On the other hand, in the present embodiment, the valve is controlled so that the water pushed out at the time of the automatic water injection will flow to the drainage port.
Moreover, when draining is performed as described above, there is a possibility that air may be mixed in the pipe even if water is subsequently poured. Therefore, after draining work, even if there is a driving path that does not pass through the bathtub 50 or the cistern 237, the path is changed so as to pass through the bathtub 50 or the cistern 237 to perform the air venting operation.

[Feature 6: Cost reduction]
In the present embodiment, the water supply pipe 151 is connected to the cistern 237 via the gas heater 20 and the common pipe 691. Then, when the amount of water in the cistern 237 falls below a predetermined reference value, the cistern 237 can be supplied with water via the water supply pipe 151, the gas boiler 20, and the common pipe 691. As a result, the cistern dedicated refill water solenoid valve, which was conventionally required, becomes unnecessary, and the cost can be reduced.

[Embodiment]
FIG. 1 is a plan view showing a hot water supply and heating system according to a first embodiment of the present invention.
FIG. 1A is a front view showing a hot water supply and heating system according to the present embodiment. FIG.1 (b) is a side view showing the hot-water supply heating system which concerns on this embodiment.

  The hot water supply heating system 2 according to the present embodiment is a hybrid appliance in which the gas water heater 20 and the heat pump unit 30 are combined, and is applied to uses such as central heating used for each dwelling unit of a collective housing or a detached house. Ru. The heat pump unit 30 has an intake unit 31 and an exhaust unit 32 and is disposed so as to sandwich the gas boiling unit 20. In other words, the gas boiling unit 20 is disposed side by side with the heat pump unit 30 between the intake unit 31 of the heat pump unit 30 and the exhaust unit 32 of the heat pump unit 30.

  The gas boiler 20 has, for example, a rectangular case 21 formed to be long in the vertical direction. The housing 21 of the gas heater 20 is covered by a front cover. The front cover of the housing 21 is provided with a plurality of air inlets 228 and an air outlet 226. Intake ports 228 are provided on the front and side of the front cover. The exhaust port 226 is provided at the top of the front of the front cover.

  For example, the heat pump unit 30 has a housing 33 formed in a substantially U-shape as viewed from above, and is disposed over the right and left areas and the rear area of the gas boiler 20. A plurality of intake ports 315 are provided substantially over the entire surface of the front cover of the intake section 31 of the heat pump section 30. Further, the front cover of the exhaust unit 32 of the heat pump unit 30 is provided with a plurality of exhaust ports 325 over substantially the entire surface. The arrangement and number of the air inlets 228 and the air outlets 226 of the gas heater 20 and the air inlets 315 and the air outlets 325 of the heat pump unit 30 are not limited to the example shown in FIG.

FIG. 2 is a piping diagram showing the hot water supply and heating system according to the present embodiment.
As shown in FIG. 2, the hot water supply and heating system 2 according to the present embodiment includes a tank unit 10, a gas boiling unit 20, a heat pump unit 30, a heating device 40, and a control device 70. The tank unit 10, the gas boiling unit 20, the heat pump unit 30, and the control device 70 are provided inside the case 21 and the case 33 shown in FIG.

The tank unit 10 includes a tank 101, a pressure reducing valve 102, and a plate heat exchanger 103.
The tank 101 stores water supplied from a water supply source (for example, water supply). The capacity of the tank 101 is, for example, about 10 liters (L) or more and 20 L or less. However, the capacity of the tank 101 is not limited to this. The tank 101 is a closed type, and at least a part of the outside is covered with a heat insulating material.

  In addition, the liquid which flows through each pipe line with which the hot-water supply heating system 2 which concerns on this embodiment is equipped is not limited only to water. However, in the description of the present embodiment, the case where the liquid flowing through the pipes of the hot water supply and heating system 2 is water is taken as an example. Moreover, in this specification, when only calling it "water", not only cold water which is not heated but heated warm water or hot water may be contained in "water."

  On the surface of the tank 101, a first tank surface thermistor 111, a second tank surface thermistor 112, and a plate heat exchanger 103 are provided. An in-tank thermistor 113 is provided inside the tank 101. The first tank surface thermistor 111, the second tank surface thermistor 112, and the in-tank thermistor 113 are provided at substantially equal intervals in this order from the lower portion to the upper portion of the tank 101. The first tank surface thermistor 111 detects the temperature of the surface of the tank 101 corresponding to the lower end of the plate heat exchanger 103. The second tank surface thermistor 112 detects the temperature of the surface of the tank 101 corresponding to the upper end of the plate heat exchanger 103. The in-tank thermistor 113 detects the temperature of the water discharged to the hot water introduction pipe 153 connected to the upper portion of the tank 101.

  The pressure reducing valve 102 is provided in the middle of the water supply pipe 151 which guides the water supplied from the water supply source, and has a check valve. The pressure reducing valve 102 reduces the pressure of the water supplied from the water supply source. Further, the pressure reducing valve 102 stabilizes the pressure of water after passing through the pressure reducing valve 102 to be substantially constant.

  The plate heat exchanger 103 is provided on the lower surface of the tank 101. The plate heat exchanger 103 is an outer cover of the plate heat exchanger 103 and a tank between water (for example, hot water) flowing inside the plate heat exchanger 103 and water (for example, cold water) stored inside the tank 101. The heat exchange can be performed in the form of double insulation with the exterior of 101. The plate heat exchanger 103 is a so-called liquid-liquid heat exchanger.

  The water supply pipe 151 is connected to the lower portion of the tank 101 on the downstream side of the pressure reducing valve 102. Further, a water introduction pipe 152 branched from the water supply pipe 151 is connected to the water supply pipe 151 between the pressure reducing valve 102 and the tank 101. The water introduction pipe 152 is provided with a water control valve 114, a water amount sensor 115, and a water temperature thermistor 116. The water control valve 114 adjusts the opening degree of the valve and controls the flow rate of water flowing through the water introduction pipe 152. The water amount sensor 115 detects the flow rate of water flowing through the water introduction pipe 152. The water temperature thermistor 116 detects the temperature of the water flowing through the water introduction pipe 152. A drain plug 104 is provided at an end of a pipe branched from the water supply pipe 151 between the pressure reducing valve 102 and the tank 101.

  A hot water introduction pipe 153 is connected to the top of the tank 101. The hot water introduction pipe 153 is provided with a hot water control valve 117, a hot water amount sensor 118, and a hot water temperature thermistor 119. The hot water control valve 117 adjusts the opening degree of the valve and controls the flow rate of the hot water flowing through the hot water introduction pipe 153. The hot water amount sensor 118 detects the flow rate of the hot water flowing through the hot water introduction pipe 153. The hot water temperature thermistor 119 detects the temperature of the hot water flowing through the hot water introduction pipe 153.

  The water introduction pipe 152 and the hot water introduction pipe 153 join as a mixed water introduction pipe 154. The water flowing through the water introducing pipe 152 and the water flowing through the hot water introducing pipe 153 join together as mixed water through the mixed water introducing pipe 154 and flow toward the gas water boiling section 20. The mixed water introduction pipe 154 is provided with a mixing thermistor 121. The mixing thermistor 121 detects the temperature of water flowing through the mixed water introduction pipe 154.

  The gas heater 20 includes a combustion device 201, a neutralizer 231, a drain tank 233, a bath pump 235, a recovery pump 236, and a cistern 237.

  The combustion chamber 202 of the combustion apparatus 201 is provided with a first burner 203, a second burner 204, a hot water supply latent heat exchanger 205, a hot water heat exchanger 206, and a bath heat exchanger 207. There is. Further, to the combustion device 201, an ignition plug 215, a frame rod 216, and an overheat prevention device (thermal fuse) 217 are attached.

  The first burner 203 and the second burner 204 are provided in the vicinity of the hot water supply heat exchanger 206 and the bath heat exchanger 207, and heat the hot water supply heat exchanger 206 and the bath heat exchanger 207. The hot water supply heat exchanger 206 has a large number of fins and is heated by at least one of the first burner 203 and the second burner 204. Like the hot water supply heat exchanger 206, the bath heat exchanger 207 has a large number of fins and is heated by at least one of the first burner 203 and the second burner 204. The hot water supply latent heat exchanger 205 is provided above the hot water supply heat exchanger 206 and the bath heat exchanger 207, and recovers the latent heat contained in the exhaust gas of the combustion chamber 202. That is, the hot water supply latent heat heat exchanger 205 performs the combustion exhaust after the hot water supply heat exchanger 206 and the bath heat exchanger 207 perform heat exchange by the combustion of at least one of the first burner 203 and the second burner 204. It is provided in the position which contacts. In this manner, the combustion device 201 can heat the supplied water by the combustion of at least one of the first burner 203 and the second burner 204.

  A combustion fan 208 and a gas pipe 601 are connected to the combustion chamber 202. The gas pipe 601 is connected to the combustion chamber 202 via the first gas branch pipe 602 and the second gas branch pipe 603.

  The combustion fan 208 sends the air necessary for the combustion of the first burner 203 and the second burner 204 to the combustion chamber 202. The gas pipe 601 is branched into a first gas branch pipe 602 and a second gas branch pipe 603. The gas pipe 601 leads the gas necessary for combustion to the first burner 203 via the first gas branch pipe 602. The gas pipe 601 also guides the gas necessary for combustion to the second burner 204 via the second gas branch pipe 603.

  The gas pipe 601 is provided with a source gas solenoid valve 211 and a gas proportional valve 212. The first gas branch pipe 602 is provided with a first gas solenoid valve 213. The second gas branch pipe 603 is provided with a second gas solenoid valve 214. The source gas solenoid valve 211 controls gas supply and shutoff to the first burner 203 and the second burner 204. The gas proportional valve 212 controls the amount of fuel supplied to the corresponding first burner 203 and second burner 204 with the valve opening degree. The first gas solenoid valve 213 and the second gas solenoid valve 214 control fuel supply / stop to the corresponding first burner 203 and second burner 204.

  The combustion chamber 202 of the combustion apparatus 201 is further provided with a hot water supply tray 225 as a drain (water) receiving portion. When the water vapor present in the combustion exhaust air in the combustion chamber 202 condenses and drips on the surface of the hot water latent heat exchanger 205 at a relatively low temperature, the dripped drain is stored in the hot water receptacle 225. The hot water supply tray 225 is connected to the neutralizer 231 through a drain discharge pipe 639.

  The neutralizer 231 includes a neutralizer water level electrode 232 and performs a neutralization process on the drain led from the hot water supply tray 225 through the drain discharge pipe 639. The drain tank 233 has a water level electrode 234, and stores the drain neutralized by the neutralizer 231. As indicated by arrows A3 and A4 shown in FIG. 2, the drain overflowing from the drain tank 233 is appropriately drained.

  The cistern 237 is a container having a water level electrode 238 and an overflow valve 239, and stores water inside. The cistern 237 is opened to the atmosphere by opening the overflow valve 239. In other words, the cistern 237 functions as a reservoir for removing air. The opening and closing operation of the overflow valve 239 is controlled by the control device 70. That is, the overflow valve 239 does not automatically open when a pressure higher than a predetermined pressure is applied, but opens and closes based on the signal transmitted from the control device 70.

  The heat pump unit 30 includes a heat medium circulation path 351, a first liquid heat exchanger 301, a second liquid heat exchanger 302, a gas heat exchanger 303, a compressor 304, an expansion valve 305, and a fan. A three-way switching valve 307 and a defrost valve 308 are provided. The heat medium circulation path 351 is a pipe line for circulating a heat medium such as fluorocarbon gas R410A, for example, and passes through the insides of the first liquid heat exchanger 301 and the second liquid heat exchanger 302. The gas heat exchanger 303, the compressor 304 and the expansion valve 305 are connected to the heat medium circuit 351. The first liquid heat exchanger 301 is connected in series to the gas heat exchanger 303 by the heat medium circulation path 351. The second liquid heat exchanger 302 is connected in series with the gas heat exchanger 303 by the heat medium circulation path 351.

  The first liquid heat exchanger 301 is not connected between the heat medium flowing through the heat medium circulation path 351 and the water (liquid) led from the gas boiler 20 to the inside of the first liquid heat exchanger 301. Heat exchange can be performed by contact. That is, in the inside of the first liquid heat exchanger 301, the heat medium circulating passage 351 is formed by the inner pipe 352 of the first liquid heat exchanger 301 through which the water supplied from the gas boiler 20 toward the heat pump 30 passes. And are connected thermally. The first liquid heat exchanger 301 is a so-called liquid-liquid heat exchanger.

  The second liquid heat exchanger 302 includes a heat medium flowing through the heat medium circuit 351 and water (liquid) led from the plate heat exchanger 103 of the tank unit 10 to the inside of the second liquid heat exchanger 302. And heat exchange can be performed without contact. That is, inside the second liquid heat exchanger 302, the heat medium circulation path 351 is connected to the inner pipe 353 of the second liquid heat exchanger 302 through which the water supplied from the tank unit 10 toward the heat pump unit 30 passes. Thermally connected. Like the first liquid heat exchanger 301, the second liquid heat exchanger 302 is a so-called liquid-liquid heat exchanger.

  The gas heat exchanger 303 performs heat exchange between the outside air (gas) blown by the fan 306 and the heat medium flowing through the heat medium circulation passage 351.

  The compressor 304 compresses the heat medium inside the heat medium circulation path 351. Specifically, the compressor 304 is supplied with a heat medium in a relatively high temperature, low pressure gaseous state. The heat medium is compressed by the compressor 304 into a high temperature and high pressure gaseous state. The compressor 304 supplies the heat medium in the gaseous state at high temperature and pressure after compression to the four-way switching valve 307 as indicated by an arrow A5 shown in FIG. At this time, the high-temperature and high-pressure gas state is a state which is likely to become a liquid (immediately before becoming a liquid).

  The expansion valve 305 reduces the pressure of the heat medium in the heat medium circuit 351. Specifically, the expansion valve 305 is supplied with a heat medium in a relatively low temperature, high pressure liquid state. The heat medium is depressurized by passing through the expansion valve 305, and becomes a low-temperature low-pressure liquid state. At this time, the low-temperature low-pressure liquid state is a state which tends to be a gas (immediately before becoming a gas).

  The four-way switching valve 307 switches the flow of the heat medium in the heat medium circulation path 351. When the heat medium delivered from the compressor 304 is supplied to the first liquid heat exchanger 301 via the four-way switching valve 307, the heat medium in the high temperature / high pressure gaseous state is the first liquid heat exchanger 301. Supplied to Therefore, in this case, the first liquid heat exchanger 301 functions as a heater, and heats the water supplied from the gas boiler 20. At this time, the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301 is deprived of heat as a result of heat exchange. The low-temperature low-pressure liquid heat medium that has passed through the expansion valve 305 is supplied to the second liquid heat exchanger 302 via the gas heat exchanger 303. Therefore, in this case, the second liquid heat exchanger 302 functions as a cooler.

  On the other hand, when the heat medium delivered from the compressor 304 is supplied to the second liquid heat exchanger 302 via the four-way switching valve 307, the heat medium in the high-temperature high-pressure gaseous state is the second liquid heat. It is supplied to the exchanger 302. Therefore, in this case, the second liquid heat exchanger 302 functions as a heater, and heats the water supplied from the plate heat exchanger 103 of the tank unit 10. At this time, the heat medium flowing through the heat medium circulation path 351 inside the second liquid heat exchanger 302 is deprived of heat as a result of heat exchange. The first liquid heat exchanger 301 is supplied with the low-temperature low-pressure liquid heat medium that has passed through the expansion valve 305. Therefore, in this case, the first liquid heat exchanger 301 functions as a cooler, and cools the water supplied from the gas boiler 20.

  As described above, when the first liquid heat exchanger 301 functions as a cooler and the second liquid heat exchanger 302 functions as a heater, the heat medium is the four-way switching valve 307 shown in FIG. Pass through the dashed part of. On the other hand, when the first liquid heat exchanger 301 functions as a heater and the second liquid heat exchanger 302 functions as a cooler, the heat medium is the one of the four-way switching valve 307 shown in FIG. Pass the solid line part.

  The defrosting valve 308 is provided in the heat medium bypass pipe 354 branched from the heat medium circulation path 351. The defrosting valve 308 adjusts the degree of opening of the valve to adjust the degree of pressure reduction of the heat medium by the expansion valve 305, thereby the first liquid heat exchanger 301, the second liquid heat exchanger 302, and the gas heat The frost adhering to at least one of the exchangers 303 can be removed.

  The heat medium circulation path 351 is provided with a pressure sensor 314. The pressure sensor 314 can detect the pressure of the heat medium circulating in the heat medium circuit 351.

  The heating device 40 includes a high temperature heating device 401 and a low temperature heating device 402. As the high temperature heating device 401, a bathroom heater etc. are mentioned, for example. As the low-temperature heating device 402, a warm water mat etc. are mentioned, for example.

  Hot water having a preset temperature (for example, about 80 ° C.) is supplied to the high-temperature heating device 401 from the gas boiler 20 through the thermal valve 404. For example, when the high-temperature heating device 401 is a bathroom heater, warm air is supplied to the inside of the bathroom by driving the heating fan 403. The hot water that has passed through the high-temperature heating device 401 is guided to the cistern 237 via the liquid junction portion 405.

  Hot water of a preset temperature (for example, about 60 ° C.) is supplied to the low-temperature heating device 402 through a low-temperature forward thermal valve 241 provided in the gas boiling unit 20. The hot water that has passed through the low-temperature heating device 402 is led to the cistern 237 via the liquid junction portion 405.

  The control device 70 is electrically connected to the tank unit 10, the gas boiler 20, the heat pump unit 30, and the heating device 40, and the tank unit 10, the gas boiler 20, and the heat pump unit 30. , And the operation of the heating device 40 are controlled.

Next, mutual connection among the tank unit 10, the gas boiling unit 20, the heat pump unit 30, the heating device 40, and the bathtub 50 will be described with reference to the drawings.
In the hot water supply and heating system 2 according to the present embodiment, the tank unit 10 is connected to the gas boiling unit 20 by a pipe line. The gas boiling unit 20 is connected to the heat pump unit 30, the heating device 40, and the bathtub 50 by a pipe line. The heat pump unit 30 is connected to the heating device 40 and the bathtub 50 through a gas water heater 20 by a pipeline. The heating device 40 is connected to the bath tub 50 via a gas heater 20 by a pipeline.

  At this time, except for a pipe line for directly connecting the gas boiling section 20 and the tank section 10 and a pipe line for recovering the heat generated in the heat pump section 30 to the tank section 10, the tank section 10 and the gas The water heating unit 20, the heat pump unit 30, the heating device 40, and the bathtub 50 have a first common pipe 691 (see the filled portion shown in FIG. 2) and a second common pipe 692 (shown in FIG. 2) Are connected to one another via at least a part of That is, a part of the tub line is common to a part of the heating line.

  The first common pipe 691 has an outlet pipe 609 of the bath heat exchanger 207 and a first bath passing pipe 619, and an inlet pipe 608 of the bath heat exchanger 207 and a bath going three-way valve 246, It is connected to the. As indicated by arrow A1 in FIG. 2, the water flowing through the first common pipe 691 flows from the bath heat exchanger 207 toward the bathtub 50. The upstream end of the first common pipe 691 is connected to the inlet pipe 608 of the bath heat exchanger 207 inside the bath heat exchanger 207. The downstream end of the first common pipe 691 is connected to the on-the-bath three-way valve 246.

  The second common pipe 692 has a third bath return pipe 625, a bath pump inlet pipe 626, a bath pump outlet pipe 614, and an inlet pipe 608 of the bath heat exchanger 207, and the bath return four-way valve 249 and an outlet pipe 609 of the bath heat exchanger 207. As indicated by arrow A2 in FIG. 2, the water flowing through the second common pipe 692 flows from the bath pump 235 toward the bath heat exchanger 207. The upstream end of the second common pipe 692 is connected to the bath return four-way valve 249. The downstream end of the second common pipe 692 is connected to the outlet pipe 609 of the bath heat exchanger 207 inside the bath heat exchanger 207.

[Connection between gas water heater and bathtub]
First, the connection between the gas heater 20 and the bath 50 will be described. The pipeline described here is an example of a pipeline of a bathtub system which connects the gas boiling unit 20 and the bathtub 50. The pipeline connecting the gas heater 20 and the bathtub 50 includes a first common pipe 691, a second bath feed pipe 621, a third bath feed pipe 622, and a first bath return pipe 623, A second bath return pipe 624 and a second common pipe 692 are provided.

  The outlet pipe 609 of the bath heat exchanger 207 in the first common pipe 691 is connected to the first bath going pipe 619 via the bath going four way valve 245. The first bath transfer pipe 619 is connected to the second bath transfer pipe 621 via a bath transfer three-way valve 246. The second bathing pipe 621 is connected to a third bathing pipe 622 connected to the bath 50 via a circulation fitting (not shown). The on-the-bath three-way valve 246 switches between the state in which the water introduced to the first on-the-bath pipe 619 is introduced to the bathtub 50 and the state in which the water is introduced to the high temperature heating device 401 of the heating device 40. That is, the state in which the water guided to the first bath pipe 619 is guided to the second bath pipe 621 and the state in which the water led to the second bath pipe 627 is guided to the first high temperature heating pipe 627 Switch. The bath forward three-way valve 246 corresponds to a switching valve that switches between the state in which water flows in the pipe of the bathtub system and the state in which water flows in the pipe of the heating system.

  A first bath return pipe 623 different from the third bath forward pipe 622 is connected to the bath tub 50 via a circulation fitting (not shown). The first bath return pipe 623 is connected to the second bath return pipe 624, and is connected to the third bath return pipe 625 of the second common pipe 692 via the bath return four-way valve 249. The third bath return pipe 625 is connected to the bath pump inlet pipe 626 via the plate four-way valve 251. The bath pump inlet pipe 626 is connected to the bath pump outlet pipe 614 via the bath pump 235. The bath pump outlet pipe 614 is connected to the inlet pipe 608 of the bath heat exchanger 207.

  The outlet pipe 609 of the bath heat exchanger 207 is provided with a first bath-traveling thermistor 256. The first bath trip thermistor 256 detects the temperature of the water flowing through the outlet pipe 609 of the bath heat exchanger 207.

  A second bath-traveling thermistor 621 is provided in the second bath-traveling pipe 621. The second bath-traveling thermistor 257 detects the temperature of the water flowing through the second bath-traveling pipe 621. A first drain switching three-way valve 247 is provided in the third bathing pipe 622. The first drain switching three-way valve 247 switches between a state in which the water flowing through the third bath transfer pipe 622 is guided to the bathtub 50 and a state in which the water is discharged. The second bath return pipe 624 is provided with a solenoid valve 248.

  In the bath pump inlet pipe 626, the second drain switching three-way valve 252, the bath water flow switch 253, the bath return thermistor 254, and the water level sensor 255 are in this order from the upstream side (bath 50 side) to the downstream side (bath It is provided toward the pump 235). The bath water flow switch 253 detects that water is flowing through the bath pump inlet pipe 626. The bath return thermistor 254 detects the temperature of the water flowing through the bath pump inlet pipe 626.

[Connection between gas water heater and heating system]
Subsequently, the connection between the gas boiling unit 20 and the heating device 40 will be described. The pipe line described here is an example of a pipe line of a heating system that connects the gas boiling unit 20 and the heating device 40. The first common pipe 691 described above with respect to the connection between the gas heater 20 and the bath 50 is connected to the first high-temperature heating return pipe 627 via the bath return three-way valve 246. The first high-temperature heating return pipe 627 is connected to the second high-temperature heating return pipe 451. The second high-temperature heating return pipe 451 passes through the inside of the high-temperature heating device 401 via the thermal valve 404 and is connected to the high-temperature heating return pipe 452. The high-temperature heating return pipe 452 is connected to the heating return pipe 628 via the liquid junction portion 405. The heating return pipe 628 is connected to the cistern 237.

  The cistern outlet pipe 629 different from the heating return pipe 628 is connected to the cistern 237. The cistern outlet pipe 629 is connected to a second common pipe 692 via a bath return four-way valve 249. In the bath return four-way valve 249, the water in the inside of the bathtub 50 is guided to the second common pipe 692, and the water flowing through the high-temperature heating device 401 and the low-temperature heating device 402 passes through the systurn 237 The state to be led to 692 is switched. The bath return four-way valve 249 corresponds to a switching valve that switches between the state in which water flows through the pipe of the bathtub system and the state in which water flows through the pipe of the heating system. The second common pipe 692 is as described above for the connection between the gas heater 20 and the bath 50.

  A bathtub bypass pipe 631 is connected to the second bath feed pipe 621 and the first high-temperature heating feed pipe 627. The bathtub bypass pipe 631 is provided with a solenoid valve 258. In a state in which the water flowing through the first hot water transfer pipe 619 is guided to the first high-temperature heating hot transfer pipe 627, the solenoid valve 258 adjusts the valve opening degree, and the second hot water transfer pipe through the bathtub bypass pipe 631. Water can be led to 621. That is, the bathtub bypass pipe 631 and the solenoid valve 258 can lead water to both the first high-temperature heating return pipe 627 and the second bath transfer pipe 621 at an arbitrary flow ratio.

  To the outlet pipe 609 of the bath heat exchanger 207, a first low-temperature capacity pipe 632 branched from the outlet pipe 609 of the bath heat exchanger 207 is connected. The first low-temperature capacity pipe 632 is connected to the second low-temperature capacity pipe 633 via a first low-temperature capacity four-way valve 259. The second low temperature capacity pipe 633 is connected to the third low temperature capacity pipe 634 via a second low temperature capacity four-way valve 261. And, the third low temperature capacity tube 634 is connected to the cistern 237.

  Also, the second low temperature capacity pipe 633 is connected to the first heating forward pipe 617 and the second heating outward pipe 635 via the second low temperature capacity four-way valve 261. The second heating return pipe 635 is connected to the third heating return pipe 636 and the fourth heating return pipe 637 through the heat storage three-way valve 262.

  The third heating return pipe 636 is connected to the low temperature heating return pipe 453 via the low temperature return heating valve 241. The low temperature heating forward pipe 453 passes through the inside of the low temperature heating device 402 and is connected to the low temperature heating return pipe 454. The low temperature heating return pipe 454 is connected to the heating return pipe 628 via the liquid junction 405. The connection between the heating return pipe 628, the cistern 237, the cistern outlet pipe 629, and the second common pipe 692 is as described above.

  The first low-temperature capacity pipe 632 is provided with a low-temperature capacity switching valve 263. The low temperature capability switching valve 263 adjusts the opening degree of the valve and controls the flow rate of water flowing through the first low temperature capability tube 632. That is, the low temperature capability switching valve 263 regulates the opening degree of the valve, and the flow rate of water guided to the first bath forward pipe 619 through the outlet pipe 609 of the bath heat exchanger 207; The ratio of the flow rate of water led to the first low temperature capacity tube 632 through the outlet tube 609 is controlled. The low temperature capability switching valve 263 can stop the water flowing through the first low temperature capability tube 632 by closing the valve. That is, the low temperature capability switching valve 263 has a water stop function.

[Connection between gas water heater and heat pump]
Subsequently, the connection between the gas boiling unit 20 and the heat pump unit 30 will be described. The inlet pipe 615 of the first liquid heat exchanger 301 branched from the bath pump outlet pipe 614 is connected to the bath pump outlet pipe 614 of the second common pipe 692. The inlet pipe 615 of the first liquid heat exchanger 301 is connected to the outlet pipe 616 of the first liquid heat exchanger 301 via the inner pipe 352 of the first liquid heat exchanger 301. The outlet pipe 616 of the first liquid heat exchanger 301 is connected to the inlet pipe 608 of the bath heat exchanger 207 of the second common pipe 692.

  A heat pump inlet three-way valve 243 is provided at the connection between the bath pump outlet pipe 614 and the inlet pipe 615 of the first liquid heat exchanger 301. The heat pump inlet three-way valve 243 is in a state in which the water pumped from the bath pump 235 is led to the inlet pipe 615 of the first liquid heat exchanger 301 and in a state where it is led directly to the inlet pipe 608 of the bath heat exchanger 207. And switch.

  In the inlet pipe 615 of the first liquid heat exchanger 301, an inlet thermistor 311 is provided. The inlet thermistor 311 is the water flowing through the inlet pipe 615 of the first liquid heat exchanger 301 and detects the temperature of the water just before flowing into the first liquid heat exchanger 301. The outlet pipe 616 of the first liquid heat exchanger 301 is provided with an outlet thermistor 312. The outlet thermistor 312 is the water flowing through the outlet pipe 616 of the first liquid heat exchanger 301, and detects the temperature of the water immediately after flowing out of the first liquid heat exchanger 301.

  The water drain pipe 357 branched from the outlet pipe 616 of the first liquid heat exchanger 301 is connected to the outlet pipe 616 of the first liquid heat exchanger 301. At the end of the drainage pipe 357, a drainage plug 313 is provided. In addition, a first heating return pipe 617 branched from the outlet pipe 616 of the first liquid heat exchanger 301 is connected to the outlet pipe 616 of the first liquid heat exchanger 301 downstream of the outlet thermistor 312 ing.

  A heat pump outlet three-way valve 244 is provided at the connection between the outlet pipe 616 of the first liquid heat exchanger 301 and the first heating feed pipe 617. The heat pump outlet three-way valve 244 switches between the state in which the water flowing through the first liquid heat exchanger 301 is guided to the inlet pipe 608 of the bath heat exchanger 207 and the state in which the water is guided to the first heating forward pipe 617. . A heating bypass pipe 618 is connected to the outlet pipe 616 of the first liquid heat exchanger 301 and the first heating feed pipe 617. A solenoid valve 264 is provided in the heating bypass pipe 618.

  In a state where the water having flowed through the first liquid heat exchanger 301 is guided to the inlet pipe 608 of the bath heat exchanger 207, the solenoid valve 264 regulates the opening of the valve and the first heating through the heating bypass pipe 618 Water can be introduced into the forward pipe 617. That is, the heating bypass pipe 618 and the solenoid valve 264 can direct water to both the inlet pipe 608 of the bath heat exchanger 207 and the first heating feed pipe 617 at an arbitrary flow ratio.

[Connection between heat pump section and bathtub]
Subsequently, the connection between the heat pump unit 30 and the bathtub 50 will be described. The pipeline described here is an example of a pipeline of a bathtub system that connects the heat pump unit 30 and the bathtub 50. The outlet pipe 616 of the first liquid heat exchanger 301 is connected to the first heating forward pipe 617 via the heat pump outlet three-way valve 244, as described above for the connection between the gas boiler 20 and the heat pump 30. It is done. The first heating return pipe 617 is connected to the second heating return pipe 635 via the second low-temperature capacity four-way valve 261. The second heating return pipe 635 is connected to the fourth heating return pipe 637 via the heat storage three-way valve 262. The fourth heating return pipe 637 is connected to the first common pipe 691 via the bath return four-way valve 245. The heat storage three-way valve 262 switches the state in which the water flowing through the second heating incoming pipe 635 is led to the third heating incoming pipe 636 and the state where the water is led to the fourth heating incoming pipe 637.

  The connection between the first common pipe 691 and the bath 50 is as described above in connection with the connection between the gas boiler 20 and the bath 50. The connection between the second common pipe 692 and the bath 50 is as described above for the connection between the gas boiler 20 and the bath 50. Then, as described above with respect to the connection between the gas boiling unit 20 and the heat pump unit 30, the bath pump outlet pipe 614 of the second common pipe 692 is the first liquid heat via the heat pump inlet three-way valve 243 It is connected to the inlet pipe 615 of the exchanger 301.

[Connection between heat pump unit and heating device]
Then, the connection of the heat pump part 30 and the heating apparatus 40 is demonstrated. The pipeline described here is an example of a pipeline of a heating system that connects the heat pump unit 30 and the heating device 40. As described above in connection with the heat pump unit 30 and the bathtub 50, the outlet pipe 616 of the first liquid heat exchanger 301 is connected to the first heating forward pipe 617 via the heat pump outlet three-way valve 244 There is. The first heating feed pipe 617 includes a second low temperature capacity four-way valve 261, a second heating feed pipe 635, a heat storage three-way valve 262, a fourth heating feed pipe 637, and a bath feed four-way valve 245; Are connected to the first common pipe 691. Of the first common pipe 691, the first bath passing pipe 619, the first high temperature heating incoming pipe 627, the second high temperature heating incoming pipe 451, the high temperature heating device 401, and the high temperature heating return pipe 452 The connection of the heating return pipe 628, the cistern 237, and the cistern outlet pipe 629 is as described above in connection with the connection of the gas boiler 20 and the heating device 40.

  In addition, the second heating forward pipe 635 is connected to the third heating forward pipe 636 via the heat storage three-way valve 262. The connection between the third heating forward pipe 636, the low temperature heating incoming pipe 453, the low temperature heating return pipe 454, the heating return pipe 628, the cistern 237, and the cistern outlet pipe 629 is the gas boiler 20 and heating The connection with the device 40 is as described above.

  The cistern outlet pipe 629 is connected to a second common pipe 692 via a bath return four-way valve 249. Then, as described above with respect to the connection between the gas boiling unit 20 and the heat pump unit 30, the bath pump outlet pipe 614 of the second common pipe 692 is the first liquid heat via the heat pump inlet three-way valve 243 It is connected to the inlet pipe 615 of the exchanger 301.

[Connection between tank and gas boiler]
Subsequently, the connection between the tank unit 10 and the gas boiling unit 20 will be described. The pipeline described here is an example of a pipeline of a tank system that connects the tank unit 10 and the gas boiling unit 20. The mixed water introduction pipe 154 of the tank unit 10 is connected to the inlet pipe 604 of the hot water supply latent heat exchanger 205. The inlet pipe 604 of the hot water supply latent heat exchanger 205 may be the same pipe as the mixed water introduction pipe 154 of the tank unit 10 or a pipe different from the mixed water introduction pipe 154 of the tank unit 10 It is also good. That is, the water flowing through the mixed water introduction pipe 154 of the tank unit 10 may be led to the inlet pipe 604 of the hot water supply latent heat exchanger 205.

  A water amount sensor 221 and a bypass servo 222 are provided in the inlet pipe 604 of the hot water supply latent heat exchanger 205. The water amount sensor 221 detects the flow rate of water flowing through the inlet pipe 604 of the hot water supply latent heat exchanger 205. The bypass servo 222 is provided at a connection between the inlet pipe 604 of the hot water supply latent heat and heat exchanger 205 and the hot water supply bypass pipe 611, and controls the amount of water guided to the hot water supply bypass pipe 611. The hot water supply bypass pipe 611 is connected to the inlet pipe 604 of the hot water supply latent heat exchanger 205 and the outlet pipe 607 of the hot water supply heat exchanger 206.

  The inlet pipe 604 of the hot water supply latent heat exchanger 205 is connected to the outlet pipe 605 of the hot water supply latent heat exchanger 205. A drain plug 227 is provided at the end of the outlet pipe 605 of the hot water supply latent heat exchanger 205. In addition, an inlet pipe 606 of the hot water supply heat exchanger 206 branched from the outlet pipe 605 of the hot water supply latent heat heat exchanger 205 is connected to the outlet pipe 605 of the hot water supply latent heat exchanger 205. The inlet pipe 606 of the hot water supply heat exchanger 206 is provided with a water pipe thermistor 218. The water tube thermistor 218 detects the temperature of the water flowing through the inlet pipe 606 of the hot water supply heat exchanger 206.

  The inlet pipe 606 of the hot water supply heat exchanger 206 is connected to the outlet pipe 607 of the hot water supply heat exchanger 206. The outlet pipe 607 of the hot water supply heat exchanger 206 is provided with a heat exchange thermistor 219, a hot water supply thermistor 223, and a hot water amount servo 224. The heat exchange thermistor 219 is water flowing through the outlet pipe 607 of the hot water supply heat exchanger 206, and detects the temperature of the water immediately after passing through the hot water supply heat exchanger 206. The hot water supply thermistor 223 is water flowing through the outlet pipe 607 of the hot water supply heat exchanger 206 and is downstream of the connection between the outlet pipe 607 of the hot water supply heat exchanger 206 and the hot water supply bypass pipe 611 (hot water amount servo 224 side). Detect water temperature. The hot water amount servo controls the amount of hot water introduced to the hot water supply pipe 612.

[Connection between tank unit and heat pump unit]
Subsequently, the connection between the tank unit 10 and the heat pump unit 30 will be described. The pipeline described here is an example of a pipeline of a tank system that connects the tank unit 10 and the heat pump unit 30. The inner pipe 353 of the second liquid heat exchanger 302 is connected to the recovery pump 236 of the gas boiler 20 via the outlet pipe 355 of the second liquid heat exchanger 302. The recovery pump 236 is connected to the heat recovery circuit 613. The heat recovery circuit 613 passes through the inside of the plate heat exchanger 103 and is connected to the inlet pipe 356 of the second liquid heat exchanger 302. The heat recovery circulation path 613 is connected to the second common pipe 692 via the plate four-way valve 251.

  A solenoid valve 242 is provided in the heat recovery circuit 613 between the recovery pump 236 and the plate inlet thermistor 123. A plate inlet thermistor 123 is provided in the heat recovery circuit 613 between the solenoid valve 242 and the plate heat exchanger 103. The plate inlet thermistor 123 is a water flowing through the heat recovery circuit 613 and detects the temperature of the water just before flowing into the plate heat exchanger 103.

Next, the basic operation of the hot water supply and heating system 2 according to the present embodiment will be described with reference to the drawings.
In each of the following drawings, the three-way valve illustration described in the vicinity of the three-way valve represents that the filled portions communicate with each other (communication state), and the filled portions and the filled portions are filled. It shows that the parts which are not in communication are not in communication with each other (in the non-communication state).

[Water supply preheating operation]
FIG. 3 is a view for explaining the water supply preheating operation of the hot water supply and heating system according to the present embodiment.
The feed water preheating operation is an operation of heating the water stored in the inside of the tank 101 by the heat generated in the heat pump unit 30. Filled portions shown in FIG. 3 represent pipelines through which water flows in the feed water preheating operation. When the control device 70 executes control of the feed water preheating operation, the bath pump 235 is driven. Further, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the feed water preheating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the feed water preheating operation, the second liquid heat exchanger 302 functions as a cooler.

  As shown by arrow A17 shown in FIG. 3, when the bath pump 235 is driven, the water flowing through the bath pump inlet pipe 626 of the second common pipe 692 is pumped out from the bath pump 235, and the heat pump inlet three-way valve 243 , And the inlet pipe 615 of the first liquid heat exchanger 301 into the first liquid heat exchanger 301. The temperature of the water flowing into the first liquid heat exchanger 301 is, for example, about 30 ° C. or so.

  The water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 45.degree. As indicated by arrow A6 in FIG. 3, the water flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is led to the first heating feed pipe 617 via the heat pump outlet three-way valve 244.

  The water flowing through the first heating feed pipe 617 is the second low temperature capacity four-way valve 261, the second heating feed pipe 635, the heat storage three-way valve 262, the fourth heating feed pipe 637, and the bath going four-way valve It is led to the heat recovery circuit 613 via the H.245 and the tank forward pipe 638. As indicated by arrows A7 and A8 shown in FIG. 3, the water flowing in the heat recovery circulation path 613 passes through the inside of the plate heat exchanger 103, and through the plate four-way valve 251, the water of the second common pipe 692 It is led to a bath pump inlet pipe 626.

  At this time, the water stored inside the tank 101 is heated by the water flowing through the heat recovery circulation path 613 inside the plate heat exchanger 103. The heated water moves to the top in the tank 101. Thereby, a high temperature (for example, about 45 ° C.) water layer is formed in the upper part in the tank 101. In the lower part of the tank 101, a layer of water at a low temperature (for example, about 15 ° C.) is formed.

[Hot water supply operation / heat storage utilization hot water supply operation]
FIG. 4 is a diagram for explaining the hot water supply operation and the heat storage utilization hot water supply operation of the hot water supply and heating system according to the present embodiment.
The hot water supply operation is an operation of heating water supplied from a water supply source (for example, water supply) and supplying it to a hot water supply tap. The heat storage utilizing hot water supply operation is an operation of supplying the water stored in the tank 101 and heated in the tank 101 to the hot water supply tap. Filled portions shown in FIG. 4 represent pipelines through which water flows in the hot water supplying operation and the heat storage utilizing hot water supplying operation.

  When the hot water tap is opened, the controller 70 opens at least one of the water control valve 114 and the hot water control valve 117. Then, water flows through the mixed water introduction pipe 154 and is supplied to the gas boiler 20 by the pressure of the water supplied from the water supply source. The temperature of the water supplied from the water source is, for example, about 15 ° C.

  When the temperature of the water supplied to the gas boiling unit 20 (the detected temperature of the mixing thermistor 121) is lower than the hot water supply set temperature, the control device 70 controls the hot water supply operation to operate the combustion device 201. That is, the water flowing inside the combustion apparatus 201 is heated by at least one of the first burner 203 and the second burner 204. The temperature of the water heated in the hot water supply latent heat exchanger 205 is, for example, about 30 ° C. or so. The temperature of the water heated in the hot water supply heat exchanger 206 is, for example, about 70.degree.

  The heated water (hot water) passes through the outlet pipe 607 of the hot water supply heat exchanger 206, mixes with the water led to the hot water supply bypass pipe 611 by the bypass servo 222, and is supplied to the hot water tap via the hot water amount servo 224 . The temperature of the water led to the hot water tap is, for example, about 42 ° C. The control device 70 controls the outputs of the first burner 203 and the second burner 204 so that the temperature of the water supplied to the hot water supply tap matches the hot water supply set temperature.

  If the temperature of the water stored in the tank 101 (the temperature detected by the in-tank thermistor 113) is higher than the hot water supply set temperature, the control device 70 executes control of the heat storage utilizing hot water supply operation, and the water control valve 114 and the hot water The opening degree of each control valve 117 is adjusted. At this time, the temperature of the water stored in the tank 101 is, for example, about 45 ° C. at maximum and about 60 ° C. at maximum.

  The water flowing through the water introducing pipe 152 and the water flowing through the hot water introducing pipe 153 join together as mixed water through the mixed water introducing pipe 154, and are supplied to the hot water supply tap through the combustion device 201. At this time, the combustion apparatus 201 does not perform the combustion operation. That is, the water flowing through the combustion apparatus 201 is not heated by the first burner 203 and the second burner 204. The temperature of the water flowing through the mixed water introduction pipe 154 and the water supplied to the hot water tap is, for example, about 42.degree. Thus, control device 70 controls the respective opening degrees of water control valve 114 and hot water control valve 117 so that the temperature of the water supplied to the hot water supply tap matches the hot water supply set temperature. The pipeline through which water flows in the heat storage utilizing hot-water supply operation is the same as the pipeline through which water flows in the hot-water supply operation.

[Drain drainage operation]
5 and 6 are diagrams for explaining the drain discharge operation of the hot water supply and heating system according to the present embodiment.
The drain discharging operation is an operation for discharging the drain stored in the drain tank 233 and cleaning the pipe. Filled portions shown in FIG. 5 represent pipelines through which water flows in the operation of discharging the drain stored in the drain tank 233. Filled portions shown in FIG. 6 represent a pipeline through which water flows in the operation of flushing the pipeline.

  When the user presses an automatic button (not shown), the control device 70 executes control of the operation for draining the drain accumulated in the drain tank 233 (drain drain operation) and then executes control of the pouring operation. . Since a large amount of drain may be generated when the pouring operation is being performed, the control device 70 executes the control of the draining operation before the control of the pouring operation is performed. Then, after executing the control of the drain discharge operation, the control device 70 executes the control of the operation (cleaning operation) for cleaning the pipeline through which the water flows in the pouring operation. The automatic button is an on / off switch of an operation (bathing operation) for automatically performing bathing on the bathtub 50.

  When the control device 70 executes control of draining operation, the bath pump 235 is driven. Then, as indicated by an arrow A9 shown in FIG. 5, the drain (water) stored in the drain tank 233 passes through the first drain tank outlet pipe 641 and the second drain tank outlet pipe 642 as a second common. It is led to the bath pump inlet pipe 626 of the pipe 692. The first drain tank outlet pipe 641 is connected to the drain tank 233. Further, the first drain tank outlet pipe 641 is connected to the second drain tank outlet pipe 642 via the first low-temperature capacity four-way valve 259. The second drain tank outlet pipe 642 is connected to the bath pump inlet pipe 626 via a second drain switching three-way valve 252. The first drain tank outlet pipe 641 is provided with a check valve 265.

  As indicated by arrow A2 in FIG. 5, the drain that has flowed through the bath pump inlet pipe 626 is pumped by the bath pump 235 to the bath pump outlet pipe 614. Subsequently, as indicated by an arrow A1 in FIG. 5, the drain that has flowed through the bath pump outlet pipe 614 flows through the first common pipe 691. The drain of the first common pipe 691 that has flowed through the first bath transfer pipe 619 is led to the second bath transfer pipe 621 and the third bath transfer pipe 622 via the bath transfer three-way valve 246. The drain introduced to the third bath forward pipe 622 is drained through the first drain switching three-way valve 247.

  Subsequently, as shown in FIG. 6, the control device 70 executes control of the washing operation and opens the water control valve 114. Then, water flows through the water introduction pipe 152 and the mixed water introduction pipe 154 by the pressure of the water supplied from the water supply source, and is supplied to the gas boiler 20. The water supplied to the gas heater 20 flows through the hot water supply latent heat exchanger 205 and the hot water supply heat exchanger 206, and is led to the hot water amount servo 224. The water led to the hot water amount servo 224 flows through the first pouring pipe 643, the second pouring pipe 644 and the third pouring pipe 645, and the bath of the second common pipe 692 It is led to the pump inlet pipe 626.

  The first pouring pipe 643 is connected to the second pouring pipe 644 via the pouring solenoid valve 266, the check valve 267, and the check valve 268. The second pouring pipe 644 is connected to the third pouring pipe 645 via the pouring three-way valve 271. The third pouring pipe 645 is connected to the bath pump inlet pipe 626 of the second common pipe 692. The second pouring pipe 644 is provided with a hot water amount sensor 269. The hot water amount sensor 269 detects the flow rate of hot water flowing through the second pouring pipe 644. In the vicinity of the check valves 267 and 268, an air release valve 294 is provided.

  The water led to the bath pump inlet pipe 626 flows through the same pipe as that described above for the drain discharge operation, and is drained through the first drain switching three-way valve 247. At this time, the bath pump 235 is stopped.

[First filling operation / heat storage filling operation]
FIG. 7 is a view for explaining a first pouring operation and a heat storage pouring operation of the hot water supply and heating system according to the present embodiment.
The first pouring operation is an operation of heating water supplied from a water supply source (for example, water supply) and supplying the water to the bath 50. The heat storage pouring operation is an operation of supplying the water stored in the tank 101 and heated in the tank 101 to the bathtub 50. Filled portions shown in FIG. 7 represent pipelines through which water flows in the first filling operation and the heat storage filling operation.

  When the user presses the automatic button (not shown), the control device 70 executes the control of the first pouring operation or the heat accumulation pouring operation after executing the control of the drain discharging operation described above with reference to FIG. . In the first filling operation and the heat storage filling operation, the controller 70 opens at least one of the water control valve 114 and the hot water control valve 117. Then, water flows through the mixed water introduction pipe 154 and is supplied to the gas boiler 20 by the pressure of the water supplied from the water supply source. The temperature of the water supplied from the water source is, for example, about 15 ° C.

  If the temperature of the water supplied to the gas boiling unit 20 (the detected temperature of the mixing thermistor 121) is lower than the set temperature, the control device 70 executes the control of the first filling operation, and the combustion device Activate 201. The water (hot water) heated in the combustion apparatus 201 passes through the outlet pipe 607 of the hot water supply heat exchanger 206 and is led to the hot water amount servo 224. This is as described above with reference to FIG. The temperature of the water heated in the hot water supply latent heat exchanger 205 is, for example, about 30 ° C. or so. The temperature of the water heated in the hot water supply heat exchanger 206 is, for example, about 70.degree.

  The water led to the hot water amount servo 224 flows through the first pouring pipe 643 and is supplied to the second pouring pipe 644 via the pouring solenoid valve 266, the check valve 267, and the check valve 268. Led. The water guided to the second pouring pipe 644 is guided to the third pouring pipe 645 via the pouring three-way valve 271.

  As indicated by arrows A11 and A12 shown in FIG. 7, the water led to the third pouring pipe 645 is a bath pump through the connection between the third pouring pipe 645 and the bath pump inlet pipe 626. It branches and flows to both sides of the inlet pipe 626. The water led in the direction of the arrow A11 shown in FIG. 7 is supplied to the third bath return pipe 625, the second bath return pipe 624, and the first bath return pipe 623 of the second common pipe 692. , And is supplied to the bath 50 via a circulation fitting (not shown). On the other hand, the water led in the direction of the arrow A12 shown in FIG. 7 is common to the bath pump outlet pipe 614 of the second common pipe 692, the inlet pipe 608 of the bath heat exchanger 207 and the first common. It flows through a pipe 691 and is supplied to the bath 50 through a circulation fitting (not shown). That is, in the first pouring operation, water (hot water) heated in the combustion apparatus 201 is supplied to the bath 50 using both of the forward and backward pipes 619, 621, 622 and the return pipes 623, 624, 625. Ru.

  The temperature of the water led to the bath 50 is, for example, about 42.degree. The control device 70 controls the output of the first burner 203 and the second burner 204 so that the temperature of the water supplied to the bath 50 matches the water filling set temperature.

  If the temperature of the water stored in the tank 101 (the temperature detected by the in-tank thermistor 113) is higher than the set temperature, the control device 70 executes control of the stored heat filling operation, and the water control valve 114 and Each opening degree of the hot water control valve 117 is adjusted. At this time, the temperature of the water stored in the tank 101 is, for example, about 40 ° C. to 60 ° C.

  The water flowing through the water introduction pipe 152 and the water flowing through the hot water introduction pipe 153 join together as mixed water through the mixed water introduction pipe 154, and are led to the hot water amount servo 224 through the combustion device 201. At this time, the combustion apparatus 201 does not perform the combustion operation. That is, the water flowing through the combustion apparatus 201 is not heated by the first burner 203 and the second burner 204. The temperature of the water flowing through the mixed water introduction pipe 154 and the water supplied to the bath 50 is, for example, about 42.degree. As described above, the control device 70 controls the opening degree of each of the water control valve 114 and the hot water control valve 117 so that the temperature of the water supplied to the bathtub 50 matches the set temperature. The pipeline through which the water flows in the heat storage pouring operation is the same as the pipeline through which the water flows in the first pouring operation.

  Then, the control device 70 temporarily suspends the first pouring operation and the heat accumulation pouring operation when the water level inside the bathtub 50 is higher than the circulation fitting (not shown), and confirms the water level inside the bathtub 50 Do. Subsequently, the control device 70 executes control of the first pouring operation or the heat storage pouring operation until the water level inside the bathtub 50 reaches the set water level.

[Second pouring operation]
FIG. 8 is a view for explaining a second pouring operation of the hot water supply and heating system according to the present embodiment.
The second water filling operation described with reference to FIG. 8 is an operation of heating water supplied from a water supply source (for example, water service) using the gas water heater 20 and the heat pump unit 30, and supplying the water to the bathtub 50. It is. For example, in the case where the hot water setting temperature is 40 ° C. or lower in summer or the like in a state where hot water is not stored in the tank 101, a high efficiency hot water filling operation can be realized by using the heat pump unit 30. Filled portions shown in FIG. 8 represent pipelines through which water flows in the second pouring operation.

  When the user sets the water filling set temperature to 40 ° C. or less and presses an automatic button (not shown), the control device 70 controls the second water filling operation using the gas water boiling unit 20 and the heat pump unit 30. Run. When the control device 70 executes the control of the second pouring operation, the water supplied from the water supply source (for example, water supply) is led to the connection portion between the third pouring pipe 645 and the bath pump inlet pipe 626. . This is as described above with reference to FIG.

  The amount (sequence) of water used during the pouring operation differs between when the bathtub 50 is empty and when there is water in the bathtub 50. Therefore, first, the control device 70 operates the bath pump 235, and determines the state of the bathtub 50 by confirming on / off of the bath water flow switch 253.

  When there is water in the bathtub 50 (when the bath flow switch 253 is on), the control device 70 first performs the second process described later with reference to FIG. 10 until the temperature of the water in the bathtub 50 reaches the set temperature of the remote control. Execute reheating by reheating operation. When the temperature of the water in the bathtub 50 reaches the set temperature, the control device 70 stops the bath pump 235, stops the burning operation of the combustion device 201, and detects the current water level in the bathtub 50 by the water level sensor 255, The water filling is performed by the second water filling operation described with reference to FIG. 8 until the water level in the bathtub 50 reaches the set water level of the remote control.

  The heat pump unit 30 does not have the ability to perform heat exchange unless a predetermined time has elapsed from the start of operation. That is, the operation of heat pump unit 30 is stopped / started while the operation of hot water supply / heating system 2 shifts from the second refueling operation described later with reference to FIG. 10 to the second pouring operation described with reference to FIG. The control of the heat pump unit 30 significantly reduces the efficiency of the heat pump unit 30. Therefore, during the transition from the second reheating operation described later with reference to FIG. 10 to the second pouring operation described with reference to FIG. To be executed.

  When the water filling operation is performed until the water level in the bathtub 50 reaches the set water level by the second water filling operation described with reference to FIG. 8, the control device 70 operates the bath pump 235 just in case. Check whether the temperature of the water in the bathtub 50 matches the set temperature of the remote control. In summer, the temperature of the water in the bathtub 50 often matches the set temperature of the remote control. In this case, the operation of the hot water supply and heating system 2 shifts directly to the operation of “heat retention” and “water retention”. On the other hand, in winter, the temperature of the water in the bathtub 50 may not match the set temperature of the remote control. In that case, the control device 70 executes the reheating by the first repelling operation described later with reference to FIG. 9 until the temperature of the water in the bathtub 50 reaches the set temperature. The execution time of the repelling operation at this time is, for example, about one minute.

  When the operation of the hot water supply and heating system 2 shifts from the second pouring operation described with reference to FIG. 8 to a first repelling operation described later with reference to FIG. 9, the control device 70 stops the heat pump unit 30. The control device 70 back-calculates the pouring time until the water level in the bathtub 50 reaches the set water level, and transmits a signal to stop the heating operation of the heat pump unit 30 a predetermined time ago. Thereby, the control device 70 moves the heat of the first liquid heat exchanger 301 and executes control of the operation of cooling the heat medium inside the first liquid heat exchanger 301. Not only the efficiency of the heat pump unit 30 is enhanced because the heat of the first liquid heat exchanger 301 can be transferred, but also the amount of the heat medium in the liquid state is maintained by continuing the cooling operation in the first liquid heat exchanger 301. Become more. On the other hand, in the gas heat exchanger 303, the amount of heat medium in the liquid state is reduced. Thereby, at the time of the next driving | operation start of the heat pump part 30, the problem that time will be required for driving | operation ability to recover | restore can be solved.

  The predetermined time described above is determined by the efficiency of the heat pump unit 30 and the recovery of the operating capacity of the heat pump unit 30. Therefore, heat pump unit 30 is stopped (compressor 304 is stopped) in the second half of the second pouring operation described with reference to FIG. 8, and the operation of hot water supply heating system 2 will be described later with reference to FIG. Transition to the reheating operation of 1 or transition to the "warm" and "water retention" operation without transition.

  On the other hand, when there is no water in the bathtub 50 (when the bath flow switch 253 is off), the control device 70 first refers to FIG. 8 until the water level in the bathtub 50 reaches the set water level of the remote control. The filling operation is performed by the second filling operation. When filling is performed until the water level in the bathtub 50 reaches the set water level by the second filling operation described with reference to FIG. 8, the control device 70 operates the bath pump 235 to Check if the water temperature matches the set temperature of the remote control. Even in the summer, the temperature of the water in the bathtub 50 is less likely to coincide with the set temperature of the remote control, and for example, a reheating operation of about one minute is required. In winter, the execution time of the repelling operation is, for example, about two minutes. In any case, the operation of the hot water supply and heating system 2 shifts to the operation of “heat retention” and “water retention” after the end of the reheating operation. When the operation of the hot water supply and heating system 2 shifts from the second pouring operation described with reference to FIG. 8 to a first repelling operation described later with reference to FIG. 9, the control device 70 stops the heat pump unit 30. The control device 70 back-calculates the time until the end of the reheating operation, and transmits a signal to stop the heating operation of the heat pump unit 30 a predetermined time ago. As a result, the efficiency of the heat pump unit 30 is enhanced, and the operation recovery capability of the heat pump unit 30 at the next start of operation is enhanced.

  By the way, when there is water in the bathtub 50, the operation of the hot water supply heating system 2 is on the way from the second reheating operation described later with reference to FIG. 10 to the second pouring operation described with reference to FIG. The heat pump unit 30 performs continuous operation, and the control device 70 detects the current water level in the bathtub 50 using the water level sensor 255 during the transition. However, the vibration of the compressor 304 (the vibration of the heat medium) may be transmitted to the water level sensor 255 through the first liquid heat exchanger 301. Then, the vibration of the compressor 304 may adversely affect accurate water level detection. As the first liquid heat exchanger 301, a water-water heat exchanger in which thin plates are laminated is often used. In such a case, the thin plate itself vibrates, which greatly affects the water level sensor 255.

  On the other hand, in the hot water supply and heating system 2 according to the present embodiment, the control device 70 stops the bath pump 235 and temporarily sets the defrost valve 308 in the open state. As a result, the pressure on the outlet side of the compressor 304 can be reduced, and the vibration affecting the water level sensor 255 can be reduced, so that an accurate water level can be detected.

  That is, when detecting the water level inside the bathtub 50 by the water level sensor 255, the control device 70 stops the combustion operation of the combustion device 201 while continuing the heating operation of the heat pump unit 30. Control is performed to stop the drive and open the defrost valve 308 of the heat pump unit 30. Thereby, the heating operation of the heat pump unit 30 continues even when the operation of the hot water supply and heating system 2 is switched from the second refueling operation shown in FIG. 10 to the second pouring operation shown in FIG. Therefore, it can suppress that the efficiency of the heat pump part 30 falls. In addition, the control device 70 stops the combustion operation of the combustion device 201, stops the driving of the bath pump 235, and opens the defrost valve 308 of the heat pump unit 30, thereby suppressing the movement of water in the pipeline. it can. Thus, the water level sensor 255 can detect the water level inside the bathtub 50 with high accuracy.

  In the second pouring operation, the temperature of the water heated by the hot water supply heat exchanger 206 is not about 70 ° C., for example, about 60 ° C., for example. Further, the temperature of the water led to the hot water amount servo 224 is not about 42 ° C., for example, about 30 ° C. In this regard, the second pouring operation is different from the first pouring operation or the storage pouring operation described above with reference to FIG.

  As indicated by arrows A11 and A12 shown in FIG. 8, the water led to the third pouring pipe 645 is a bath pump through a connection between the third pouring pipe 645 and the bath pump inlet pipe 626. It branches and flows to both sides of the inlet pipe 626. The water led in the direction of the arrow A11 shown in FIG. 8 is supplied to the bath 50. This is as described above with reference to FIG. The temperature of the water led to the direction of the arrow A11 shown in FIG. 8 and supplied to the bath 50 is, for example, about 30.degree.

  On the other hand, the water led in the direction of the arrow A12 shown in FIG. 8 flows through the bath pump outlet pipe 614 of the second common pipe 692 and the first liquid heat exchange via the heat pump inlet three-way valve 243 It is led to the inlet pipe 615 of the vessel 301. The water led to the inlet pipe 615 of the first liquid heat exchanger 301 flows through the inner pipe 352 and the outlet pipe 616 of the first liquid heat exchanger 301 and is led to the inlet pipe 608 of the bath heat exchanger 207. .

  At this time, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the second pouring operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the second pouring operation, the second liquid heat exchanger 302 functions as a cooler. Therefore, the water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 45.degree.

  The water led to the inlet pipe 608 of the bath heat exchanger 207 is heated in the bath heat exchanger 207, and the first common pipe 691, the second bath traveling pipe 621, and the third bath traveling pipe 622. , And is supplied to the bathtub 50. The temperature of the water heated in the bath heat exchanger 207 and supplied to the bath 50 is, for example, about 60.degree. The other operations are the same as the first pouring operation described above with reference to FIG.

[First reaping operation]
FIG. 9 is a diagram for explaining a first reheating operation of the hot water supply and heating system according to the present embodiment.
The first repelling operation is an operation of circulating and heating the water inside the bath 50 and returning the heated water to the bath 50. Filled portions shown in FIG. 9 represent pipelines through which water flows in the first repelling operation.

  When the user presses the automatic button (not shown) and the first pouring operation described above with reference to FIG. 7 and the second pouring operation described above with reference to FIG. The water level is confirmed, and the control of the first reheating operation is performed so that the temperature of the water inside the bathtub 50 matches the set temperature. Alternatively, when the user presses the repelling button (not shown), the control device 70 performs control of the first repelling operation such that the temperature of the water inside the bathtub 50 matches the set temperature.

  When the control device 70 executes control of the first repelling operation, the bath pump 235 is driven. Then, as indicated by an arrow A2 shown in FIG. 9, the water in the inside of the bathtub 50 is the third of the first bath return pipe 623, the second bath return pipe 624, and the second common pipe 692. , And flows through the bath pump 235 to the inlet pipe 608 of the bath heat exchanger 207. At this time, the temperature of the water flowing through the inlet pipe 608 of the bath heat exchanger 207 is, for example, about 30 ° C.

  The water flowing through the bath heat exchanger 207 is heated by at least one of the first burner 203 and the second burner 204. The temperature of the water heated in the bath heat exchanger 207 is about 60 ° C., for example. The water heated in the bath heat exchanger 207 flows through the first common pipe 691, the second bath feed pipe 621, and the third bath feed pipe 622, and is supplied to the inside of the bath 50.

[Second repelling action]
FIG. 10 is a view for explaining a second reheating operation of the hot water supply and heating system according to the present embodiment.
In the first repelling operation described above with reference to FIG. 9, the water introduced from the bath 50 is heated using the gas boiler 20, while in the second repelling operation described with reference to FIG. The water introduced from the bath 50 is heated using the water heater 20 and the heat pump 30. Filled portions shown in FIG. 10 represent pipelines through which water flows in the second repelling operation.

  For example, when the user presses the repelling button (not shown) with water remaining inside the bathtub 50 and the water temperature is relatively low, the controller 70 controls the water inside the bathtub 50 to The control of the second repelling operation is performed such that the temperature of H.sub.2 matches the set temperature.

  When the control device 70 executes control of the second repelling operation, the bath pump 235 is driven. Then, as indicated by an arrow A17 shown in FIG. 10, the water inside the bath 50 flows through the bath pump outlet pipe 614 of the second common pipe 692 via the bath pump 235. At this time, the temperature of the water flowing through the second common pipe 692 is about 30 ° C., for example.

  Water flowing through the bath pump outlet pipe 614 is led to the inlet pipe 615 of the first liquid heat exchanger 301 via the heat pump inlet three-way valve 243. The water led to the inlet pipe 615 of the first liquid heat exchanger 301 flows through the inner pipe 352 and the outlet pipe 616 of the first liquid heat exchanger 301 and is led to the inlet pipe 608 of the bath heat exchanger 207. .

  At this time, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the second reheating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the second reheating operation, the second liquid heat exchanger 302 functions as a cooler. Therefore, the water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 45.degree.

  The water led to the inlet pipe 608 of the bath heat exchanger 207 is heated in the bath heat exchanger 207, and the first common pipe 691, the second bath traveling pipe 621, and the third bath traveling pipe 622. , And is supplied to the bathtub 50. The temperature of the water heated in the bath heat exchanger 207 and supplied to the bath 50 is, for example, about 60.degree.

[Third repelling action]
FIG. 11 is a view for explaining the third reheating operation of the hot water supply and heating system according to the present embodiment.
In the third reheating operation described with reference to FIG. 11, the heat pump unit 30 is used to heat the water led from the bathtub 50. Filled portions shown in FIG. 11 represent pipelines through which water flows in the third reheating operation.

  When the user presses the automatic button (not shown) and the first pouring operation described above with reference to FIG. 7 and the second pouring operation described above with reference to FIG. Check the water temperature about every 30 minutes. If the difference between the temperature of the water inside the bathtub 50 and the set temperature is 0.5 ° C. or more, the control device 70 sets the temperature of the water inside the bathtub 50 to the same as the set temperature. Execute control of reheating operation of 3. The third repelling operation described with reference to FIG. 11 is a so-called heat retention operation during automatic operation.

  For example, when the control device 70 detects that the user has entered the bathtub 50 based on the detected water level of the water level sensor 255, the control device 70 starts the operation of the heat pump unit 30 and determines the degree of temperature decrease of water inside the bathtub 50. Check. Then, for example, when the degree of temperature decrease is small as in the summer season, the control device 70 executes control of the third repelling operation described with reference to FIG. On the other hand, when the degree of temperature decrease is large as in winter, for example, the control device 70 executes control of the second repelling operation described above with reference to FIG.

  When the control device 70 executes the third repelling operation, the bath pump 235 is driven. Then, the water inside the bathtub 50 flows through the third bath return pipe 625 of the second common pipe 692. At this time, the temperature of the water flowing through the second common pipe 692 is about 30 ° C., for example.

  The water having flowed through the third bath return pipe 625 is led to the plate feed pipe 646 through the plate four-way valve 251. As indicated by arrow A7 in FIG. 11, the water led to the plate forward pipe 646 flows through the heat recovery circulation path 613 and flows into the plate heat exchanger 103. As indicated by an arrow A8 shown in FIG. 11, the water flowing into the plate heat exchanger 103 is cooled by the water stored in the tank 101, and the bath in the second common pipe 692 via the plate four-way valve 251. It is led to the pump inlet pipe 626. The temperature of the water flowing through the bath pump inlet pipe 626 is, for example, about 15 ° C. In other words, the water stored in the tank 101 is heated by the water flowing through the plate heat exchanger 103.

  As indicated by an arrow A17 shown in FIG. 11, the water led to the bath pump inlet pipe 626 flows through the bath pump outlet pipe 614 through the bath pump 235 and the first liquid thermal heat through the heat pump inlet three-way valve 243 It is led to the inlet pipe 615 of the exchanger 301. The water led to the inlet pipe 615 of the first liquid heat exchanger 301 flows through the inner pipe 352 and the outlet pipe 616 of the first liquid heat exchanger 301.

  At this time, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the third reheating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the third reheating operation, the second liquid heat exchanger 302 functions as a cooler. Therefore, the water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 45.degree.

  As shown by arrow A6 in FIG. 11, the water flowing out of the first liquid heat exchanger 301 is led to the first heating forward pipe 617 via the heat pump outlet three-way valve 244. The water introduced to the first heating return pipe 617 is introduced to the second heating return pipe 635 via the second low-temperature capacity four-way valve 261. The water introduced to the second heating return pipe 635 is introduced to the first bath return pipe 619 of the first common pipe 691 through the bath return four-way valve 245. The water led to the first bath feed pipe 619 flows through the second bath feed pipe 621 and the third bath feed pipe 622 and is supplied to the tub 50.

[Bath water heat heat pump section recovery operation]
FIG. 12 is a diagram for explaining a hot water heating heat pump portion recovery operation of the hot water supply and heating system according to the present embodiment.
The bath water heat heat pump recovery operation is an operation of circulating the hot water remaining in the bath 50 and recovering the heat of the hot water with the water stored in the tank 101 via the heat pump 30. Filled portions shown in FIG. 12 represent pipelines through which water flows in the bath water heat heat pump recovery operation.

  If the hot water remains inside the bathtub 50 when the automatic operation is finished, the control device 70 executes control of the bath water heat heat pump recovery operation. For example, when the user presses the automatic button (not shown) to stop the automatic operation manually, or when the user holds the hot-warming operation as an example of when the hot water remains inside the bathtub 50 when the automatic operation is finished. For example, the automatic operation may be automatically stopped after a lapse of time.

  When the control device 70 executes the bath water heat heat pump recovery operation, the bath pump 235 is driven. Then, the water inside the bathtub 50 flows through the third bath return pipe 625 of the second common pipe 692. At this time, the temperature of the water flowing through the third bath return pipe 625 is, for example, about 45 ° C. The water having flowed through the third bath return pipe 625 is led to the bath pump inlet pipe 626 through the plate four-way valve 251. The water led to the bath pump inlet pipe 626 flows through the same pipe as the pipe in the third repelling operation described above with reference to FIG. 11 and passes the inner pipe 352 and the outlet pipe 616 of the first liquid heat exchanger 301. Flow.

  At this time, the compressor 304 of the heat pump unit 30 supplies the heat medium to the second liquid heat exchanger 302 via the four-way switching valve 307. Therefore, the first liquid heat exchanger 301 functions as a cooler in the bath and heat pump recovery operation. On the other hand, the second liquid heat exchanger 302 functions as a heater in the bath water heat heat pump recovery operation. Therefore, the water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is cooled by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 15 ° C. As shown by arrow A6 in FIG. 12, the water flowing out of the first liquid heat exchanger 301 flows through the same pipeline as the third reheating operation described above with reference to FIG. .

  On the other hand, when the control device 70 executes the bath water heat heat pump portion recovery operation, the recovery pump 236 is driven. Then, the water flowing out of the second liquid heat exchanger 302 and flowing through the outlet pipe 355 of the second liquid heat exchanger 302 is recovered by the recovery pump 236 as indicated by arrows A13 and A14 shown in FIG. It is sent out to the circulation path 613. At this time, as described above, in the bath and heat pump recovery operation, the second liquid heat exchanger 302 functions as a heater. Therefore, the temperature of the water which flowed out of the 2nd liquid heat exchanger 302 is about 60 ° C, for example.

  As indicated by an arrow A7 shown in FIG. 12, the water sent out to the heat recovery circulation path 613 by the recovery pump 236 flows into the plate heat exchanger 103. As indicated by arrow A8 in FIG. 12, the water flowing into the plate heat exchanger 103 is cooled by the water stored in the tank 101 and flows out of the plate heat exchanger 103. The temperature of the water flowing out of the plate heat exchanger 103 is, for example, about 30.degree. In other words, the water stored in the tank 101 is heated by the water flowing through the plate heat exchanger 103. As indicated by arrows A15 and A16 shown in FIG. 12, the water flowing out of the plate heat exchanger 103 is led to the inlet pipe 356 of the second liquid heat exchanger 302 and is transmitted to the second liquid heat exchanger 302. To flow.

  Thus, the heat of the hot water remaining in the bath 50 is recovered by the water stored in the tank 101 via the heat pump section 30 in the bath water heat heat pump section recovery operation.

[Bath water heat recovery operation]
FIG. 13 is a diagram for explaining the hot water heat recovery operation of the hot water supply and heating system according to the present embodiment.
The hot water heat recovery operation is an operation of circulating the hot water remaining in the bath 50 and recovering the heat of the hot water with the water stored in the tank 101. Filled portions shown in FIG. 13 represent pipelines through which water flows in the bath heat recovery operation.

  If the hot water remains inside the bathtub 50 when the automatic operation is finished, the control device 70 executes control of the hot water heat recovery operation. Here, in the bath water heat heat pump recovery operation described above with reference to FIG. 12, the water inside the bath 50 flows through the heat pump section 30 and returns to the bath 50, while the bath water heat recovery operation described with reference to FIG. Then, the water inside the bathtub 50 flows through the tank unit 10 and returns to the bathtub 50.

  When the controller 70 executes a bath water heat recovery operation, the bath pump 235 is driven. Then, the water inside the bathtub 50 flows through the third bath return pipe 625 of the second common pipe 692. At this time, the temperature of the water flowing through the third bath return pipe 625 is, for example, about 40 ° C. The water having flowed through the third bath return pipe 625 is led to the plate feed pipe 646 through the plate four-way valve 251. The water led to the plate forward pipe 646 flows through the heat recovery circuit 613 and flows into the plate heat exchanger 103.

  As indicated by an arrow A8 shown in FIG. 13, the water flowing into the plate heat exchanger 103 is cooled by the water stored in the tank 101, and the bath in the second common pipe 692 via the plate four-way valve 251. It is led to the pump inlet pipe 626. The temperature of the water flowing through the bath pump inlet pipe 626 is, for example, about 30.degree. In other words, the water stored in the tank 101 is heated by the water flowing through the plate heat exchanger 103. The water led to the bath pump inlet pipe 626 flows through the same pipeline as the pipeline in the first reheating operation described above with reference to FIG.

  Thus, in the bath water heat recovery operation, the heat of the hot water remaining in the bath 50 is recovered by the water stored in the tank 101.

[Low-temperature heating operation]
FIG. 14 is a diagram for explaining the low-temperature heating operation of the hot water supply and heating system according to the present embodiment.
The low-temperature heating operation is an operation of operating the low-temperature heating device 402 to heat a living room (including a floor surface). Filled portions shown in FIG. 14 represent pipelines through which water flows in the low-temperature heating operation.

  When the user presses a low temperature heating button (not shown), the control device 70 executes control of a hot dash operation that rapidly raises the temperature (for example, the floor surface temperature) of the living room where the low temperature heating device 402 is installed. . The hot-dash operation is an operation that circulates water and supplies water at a high temperature of about 80 ° C., for example, to the low-temperature heating device 402. The controller 70 continues the hot dash operation, for example, for about 30 minutes. Further, the control device 70 starts the operation of the heat pump unit 30 substantially simultaneously with the start of the hot dash operation.

  When the control device 70 executes control of the hot dash operation in the low temperature heating operation, the bath pump 235 is driven. Then, as in the arrow A18 shown in FIG. 14, the water inside the cistern 237 flows through the cistern outlet pipe 629 and the third bath return pipe of the second common pipe 692 through the bath return four-way valve 249. It is led to 625. The water led to the third bath return pipe 625 is led to the bath pump inlet pipe 626 through the plate four-way valve 251. As indicated by arrow A17 in FIG. 14, the water led to the bath pump inlet pipe 626 is pumped by the bath pump 235 to the bath pump outlet pipe 614.

  The water led to the bath pump inlet pipe 626 flows through the same pipe as the pipe in the third repelling operation described above with reference to FIG. 11 and passes the inner pipe 352 and the outlet pipe 616 of the first liquid heat exchanger 301. Flow. At this time, even if the heat pump unit 30 has started operation, it does not yet have the ability to perform heat exchange because a sufficient time has not elapsed since the start of operation. Therefore, the water flowing through the first liquid heat exchanger 301 is not heated in the first liquid heat exchanger 301 and is not cooled. The temperature of water flowing from the cistern 237 to the first liquid heat exchanger 301 via the bath pump 235 is, for example, about 30 ° C. or so.

  The water having flowed through the outlet pipe 616 of the first liquid heat exchanger 301 is led to the inlet pipe 608 of the bath heat exchanger 207. The water led to the inlet pipe 608 of the bath heat exchanger 207 is heated in the bath heat exchanger 207 and led to the outlet pipe 609 of the bath heat exchanger 207 out of the first common pipe 691. The temperature of the water heated in the bath heat exchanger 207 is, for example, about 80.degree.

  The water led to the outlet pipe 609 of the bath heat exchanger 207 is the first low temperature capacity pipe 632, the second low temperature capacity pipe 633, the second heating forward pipe 635, and the third heating forward pipe 636. , And supplied to the low temperature heating device 402 via the low temperature forward heat valve 241. The water supplied to the low-temperature heating device 402 is led to the heating return pipe 628 through the liquid junction portion 405 and returns to the cistern 237.

  When the room is cold, immediately after the hot dash operation of the low-temperature heating operation is started, the water at a temperature of about 80 ° C. supplied to the low-temperature heating device 402 is cooled, and as a cold water Return to The heat pump unit 30 has an ability to perform heat exchange when a predetermined time has elapsed from the start of operation. At this time, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the low-temperature heating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the low-temperature heating operation, the second liquid heat exchanger 302 functions as a cooler. Then, after a while after the time of the hot dash operation, the temperature of water returning to the cistern 237 starts to rise.

  Therefore, the control device 70 performs control of steady operation after performing hot dash operation for about 30 minutes, for example, after the user presses the low temperature heating button (not shown). The steady operation is an operation in which water is circulated and, for example, water at a temperature of about 60 ° C. is supplied to the low-temperature heating device 402.

  The pipeline through which water flows in the steady operation of the low temperature heating operation is the same as the pipeline through which water flows in the hot dash operation of the low temperature heating operation. In the hot dash operation, the water flowing through the first liquid heat exchanger 301 is not heated, while in the steady operation, the water flowing through the first liquid heat exchanger 301 is the heat within the first liquid heat exchanger 301. The heating medium is heated by the heat medium flowing through the medium circulation path 351. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 45.degree.

  The water led to the inlet pipe 608 of the bath heat exchanger 207 is heated in the bath heat exchanger 207 and led to the outlet pipe 609 of the bath heat exchanger 207 out of the first common pipe 691. The temperature of the water heated in the bath heat exchanger 207 is about 60 ° C., for example. Thus, for example, water at a temperature of about 60 ° C. is supplied to the low temperature heating device 402.

[Low temperature low load heating operation]
FIG.15 and FIG.16 is a figure explaining the low temperature low load heating operation | movement of the hot-water supply heating system which concerns on this embodiment.
The low-temperature low-load heating operation is an operation of operating the low-temperature heating device 402 to heat a room (including a floor surface) using the heat pump unit 30. Filled portions shown in FIGS. 15 and 16 represent pipelines through which water flows in the low-temperature low-load heating operation.

  As described above with reference to FIG. 14, in the steady operation of the low temperature heating operation, for example, water at a temperature of about 60 ° C. is supplied to the low temperature heating device 402. Here, in order to suppress an excessive rise in the temperature of the living room, the control device 70 executes control of the low-temperature low-load heating operation. In the low temperature low load heating operation, for example, water at a temperature of about 40 ° C. is supplied to the low temperature heating device 402.

  As shown in FIG. 15, when the control device 70 executes control of the low-temperature low-load heating operation, the bath pump 235 is driven. Then, water in the cistern 237 is contained in the cistern outlet pipe 629, the third bath return pipe 625 of the second common pipe 692, the bath pump inlet pipe 626, the bath pump outlet pipe 614, and the first Flow through the inlet pipe 615, the inner pipe 352 and the outlet pipe 616 of the liquid heat exchanger 301. This is as described above with reference to FIG. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 40.degree.

  The water led to the outlet pipe 616 of the first liquid heat exchanger 301 is led to the first heating forward pipe 617 via the heat pump outlet three-way valve 244. The water led to the first heating incoming pipe 617 flows through the second heating incoming pipe 635 and the third heating incoming pipe 636 through the second low temperature capacity four-way valve 261, and the low temperature outgoing thermal movement The low temperature heating device 402 is supplied via the valve 241. Thus, for example, water at a temperature of about 40 ° C. is supplied to the low temperature heating device 402. In the low-temperature low-load heating operation, since the low-temperature heating device 402 is operated using the heat pump unit 30, energy efficiency can be improved.

  For example, if the insulation performance of the living room is relatively high, even if the temperature of the water supplied to the low-temperature heating device 402 is, for example, about 40 ° C., the temperature of the living room may rise excessively. In this case, as shown in FIG. 16, the control device 70 does not control the operation start / stop of the heat pump unit 30, but heats the water heated in the first liquid heat exchanger 301 to the plate heat exchanger Lead to 103. That is, the water led to the second heating incoming pipe 635 through the second low temperature capacity four-way valve 261 is the heat storage three-way valve 262, the fourth heating incoming pipe 637, the bath incoming four-way valve 245, and the tank. It is led to the heat recovery circuit 613 via the forward pipe 638. As indicated by arrows A7 and A8 shown in FIG. 16, the water flowing in the heat recovery circulation path 613 passes through the inside of the plate heat exchanger 103, and through the plate four-way valve 251, the water of the second common pipe 692 It is led to a bath pump inlet pipe 626. At this time, the water stored inside the tank 101 is heated by the water flowing through the heat recovery circulation path 613 inside the plate heat exchanger 103.

  In this manner, the control device 70 switches the heat stored in the first liquid heat exchanger 301 to the low temperature heating device 402 by switching the heat storage three-way valve 262 and the plate four-way valve 251; And the state of being guided to the exchanger 103. Thus, in the low-temperature low-load heating operation, an excessive rise in the room temperature is suppressed, and a decrease in the efficiency of the heat pump unit 30 is suppressed.

[First high-temperature heating operation]
FIG. 17 is a diagram for explaining a first high-temperature heating operation of the hot water supply and heating system according to the present embodiment.
The first high-temperature heating operation is an operation of operating the high-temperature heating device 401 to heat a room (for example, a bathroom). Filled portions shown in FIG. 17 represent pipelines through which water flows in the first high-temperature heating operation.

  When the user presses the high temperature heating button (not shown), the controller 70 executes control of the first high temperature heating operation. When the control device 70 executes control of the first high-temperature heating operation, the bath pump 235 is driven. Then, as indicated by an arrow A18 shown in FIG. 17, the water inside the cistern 237 flows through the same pipe as the pipe in the low-temperature heating operation described above with reference to FIG. .

  The water led to the bath pump inlet pipe 626 is led to the inlet pipe 608 of the bath heat exchanger 207, as represented by the arrow A2 shown in FIG. The water led to the inlet pipe 608 of the bath heat exchanger 207 is heated in the bath heat exchanger 207. The temperature of the water heated in the bath heat exchanger 207 is, for example, about 80.degree.

  The water heated in the bath heat exchanger 207 flows through the first common pipe 691 and is led to the first high-temperature heating forward pipe 627 through the bath forward three-way valve 246. The water led to the first high-temperature heating return pipe 627 flows through the second high-temperature heating return pipe 451 and is supplied to the high-temperature heating device 401. The temperature of the water supplied to the high-temperature heating device 401 is, for example, about 80.degree. The water supplied to the high-temperature heating device 401 is led to the heating return pipe 628 via the liquid junction portion 405 and returns to the cistern 237.

[Second high-temperature heating operation]
FIG. 18 is a view for explaining a second high-temperature heating operation of the hot water supply and heating system according to the present embodiment.
The second high-temperature heating operation described with reference to FIG. 18 is an operation of operating the high-temperature heating device 401 to heat a room (for example, a bathroom) in the same manner as the first high-temperature heating operation described above with reference to FIG. is there. Filled portions shown in FIG. 18 represent pipelines through which water flows in the second high-temperature heating operation.

  When the heat pump unit 30 is in operation when the user presses the high temperature heating button (not shown), the control device 70 controls the second high temperature heating operation described with reference to FIG. 18. Run. When the control device 70 executes the control of the second high-temperature heating operation as shown by an arrow A18 shown in FIG. 18, the water inside the cistern 237 is similar to the first high-temperature heating operation described above with reference to FIG. It is pumped to the bath pump outlet pipe 614 by the bath pump 235.

  As indicated by arrow A17 in FIG. 18, the water led to the bath pump outlet pipe 614 is led to the inlet pipe 615 of the first liquid heat exchanger 301 via the heat pump inlet three-way valve 243. The water led to the inlet pipe 615 of the first liquid heat exchanger 301 flows through the inner pipe 352 and the outlet pipe 616 of the first liquid heat exchanger 301.

  At this time, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the second high-temperature heating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the second high-temperature heating operation, the second liquid heat exchanger 302 functions as a cooler. Therefore, the water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 45.degree.

  The water led to the inlet pipe 608 of the bath heat exchanger 207 is heated in the bath heat exchanger 207. The temperature of the water heated in the bath heat exchanger 207 is, for example, about 80.degree.

  The water heated in the bath heat exchanger 207 flows through the same pipeline as that in the first high-temperature heating operation described above with reference to FIG. The temperature of the water supplied to the high-temperature heating device 401 is, for example, about 80.degree. The water supplied to the high-temperature heating device 401 is led to the heating return pipe 628 via the liquid junction portion 405 and returns to the cistern 237.

[High-temperature heating operation + 1st pouring operation]
FIG. 19 is a diagram for explaining the high-temperature heating operation and the first pouring operation of the hot water supply and heating system according to the present embodiment.
The operation to be described with reference to FIG. 19 is the water supply preheating operation by the heat pump unit 30, the heat storage hot water filling operation using the tank 101, and the gas of the combustion apparatus 201 in the winter in the hot water supply heating system 2 of this embodiment. The present invention relates to high-temperature heating operation by combustion and execution processing of control for comfortable bathing in a warm bathroom.

  As shown in FIG. 19, in order to bathe in a warm bathroom comfortably in winter, it is poured into the bathtub 50 while heating the inside of the bathroom at a high temperature by the heat storage pouring operation and the high temperature heating operation by the gas combustion. The hot water allows the user to take a comfortable bath with the hot water in the tub 50 in the warm bathroom. That is, the ability to burn the gas is given more to bathroom heating rather than pouring.

When the user presses the automatic water filling button in a state where there is no water in the bathtub 50, it takes 10 minutes to fill the water by pouring water, but it takes 10 minutes to 15 minutes, but the reheating itself is hardly carried out. It is confirmation level. That is, the time required for the pouring operation in the case of pouring water by the automatic pouring operation from the state where there is no water in the bathtub 50 is shorter than the time required for the pouring operation performed after bath heat is recovered. .
On the other hand, the heating time in the bathroom needs, for example, about 30 minutes. That is, with regard to a bathroom heating apparatus (for example, a high-temperature heating apparatus 401), the maximum capacity of the heating apparatus may be rate-limiting. Then, it may take time to bring the bathroom to a comfortable temperature.

Therefore, the hot water supply and heating system 2 according to the present embodiment performs pouring of water in the bathtub 50 while heating the bathroom. At that time, the control device 70 supplies the heat of the water heated in the combustion device 201 to the high temperature heating device 401, and supplies the remaining heat after being supplied to the high temperature heating device 401 to the water inside the bath 50. Run. Moreover, pouring water is carried out by using so-called double transfer of hot water efficiently by simultaneously using both the third bath forward pipe 622 and the first bath return pipe 623 simultaneously, so that the inside of the bathtub 50 is poured. Do.
In this case, the control device 70 feeds water by the direct pressure of the water supply from the water department, controls the water control valve 114 and the hot water control valve 117, starts driving the bath pump 235, and It is set to “open”, and the three-way valve 258 in the bath is set to “open”.

When the user presses the automatic button, the control device 70 starts an operation (water filling operation) to perform automatic water filling by pouring water into the bathtub 50.
The controller 70 opens at least one of the water control valve 114 and the hot water control valve 117. Then, water flows through the mixed water introduction pipe 154 by the pressure of the water supplied from the water supply source, and is supplied to the gas water boiling section 20 side. The temperature of the water stored in the tank 101 is, for example, about 30 ° C. The temperature of the water supplied from the water source is, for example, about 15 ° C.

  The water is heated via an inlet pipe 604 and an outlet pipe 605 of the hot water supply latent heat exchanger 205, an inlet pipe 606 of the hot water heat exchanger 206, and an outlet pipe 607. The water (hot water) heated in the combustion apparatus 201 passes through the outlet pipe 607 of the hot water supply heat exchanger 206 and is led to the hot water amount servo 224. The temperature of the water heated in the hot water supply latent heat exchanger 205 is, for example, about 30 ° C. or so. The temperature of the water heated in the hot water supply heat exchanger 206 is, for example, about 80.degree.

  The water led to the hot water amount servo 224 flows through the first pouring pipe 643 and is supplied to the second pouring pipe 644 via the pouring solenoid valve 266, the check valve 267, and the check valve 268. Led. The water introduced into the second pouring pipe 644 is introduced into the cistern 237 via the pouring three-way valve 271, the bath return four-way valve 249, and the cistern outlet pipe 629. That is, all of the water heated in the combustion apparatus 201 is led to the cistern 237.

  The water led to the cistern 237 is supplied to the high-temperature heating device 401 via the heating return pipe 628, the liquid junction portion 405, and the high-temperature heating return pipe 452. The temperature of the water supplied to the high-temperature heating device 401 is, for example, about 80.degree. Thus, an operation of heating the bathroom (high temperature heating operation by the high temperature heating device 401) is performed. The water supplied to the high-temperature heating device 401 flows through the second high-temperature heating return pipe 451, the bathtub bypass pipe 631 and the bath return three-way valve 258. The water flowing through the bath return three-way valve 258 is supplied into the bathtub 50 through the second bath transfer pipe 621 and the third bath transfer pipe 622, and passes through the bath return four-way valve 249 and the solenoid valve 248, The bath 50 is supplied via the second bath return pipe 624 and the first bath return pipe 623. The branch T branches into two flows.

  Thus, the water for pouring enters the two streams after passing through the high-temperature heating device 401 and flows through both the third bath forward pipe 622 and the first bath return pipe 623. Is supplied to the tub 50. That is, pouring of water into the bath 50 is performed using a so-called double transfer method of hot water. Thereby, the piping resistance between the gas boiling unit 20 and the bath 50 is suppressed, and the pouring operation is completed in a shorter time. Therefore, pouring of water into the bath 50 can be efficiently performed.

  In the case of this pouring operation, the temperature of one flow of water sent into the bathtub 50 through the third bath feed pipe 622 and the other flow of water fed into the bathtub 50 through the first bath return pipe 623. The temperatures of are the same as each other, for example, about 45.degree. Therefore, water of a temperature controlled with high accuracy is guided to the bathtub 50 by double conveyance.

  In addition, the second bath-traveling pipe 621 is provided with a second bath-traveling thermistor 257. The second bath-traveling thermistor 257 accurately detects the temperature of the water flowing through the second bath-traveling pipe 621 and notifies the control device 70 of the temperature. The control device 70 is based on the temperature detected by the second bath trip thermistor 257 when a predetermined time based on the capacity of the conduit disposed in the high-temperature heating device 401 has elapsed since the start of the pouring operation. Execute temperature field back control. According to this, the second bathing thermistor 257 detects the temperature of the water flowing through the second bath traveling pipe 621 at the timing when the temperature of the water having passed through the high-temperature heating device 401 is stabilized. Thereby, the control device 70 can accurately detect the temperature of the hot water poured into the bath 50 by the second bath trip thermistor 257 and send the water of the temperature controlled with higher accuracy to the bath 50. it can.

  On the other hand, as shown in FIG. 19, the compressor 304 of the heat pump unit 30 supplies a heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the operation shown in FIG. 19, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the operation shown in FIG. 19, the second liquid heat exchanger 302 functions as a cooler. Therefore, the water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 30 ° C. or so.

  The control device 70 starts driving the bath pump 235 so that water flows from the bath pump 235 through the heat pump inlet three-way valve 243 through the inlet pipe 615 of the first liquid heat exchanger 301. Then, water enters the outlet pipe 616 of the first liquid heat exchanger 301 from the inlet pipe 615 of the first liquid heat exchanger 301 through the inner pipe 352 of the first liquid heat exchanger 301. The water from the outlet pipe 616 of the first liquid heat exchanger 301, the first heating forward pipe 617, the second low temperature capacity four-way valve 261, the second heating forward pipe 635, the bath forward four-way valve 245 And the tank return pipe 638 to the heat recovery circuit 613.

  The water flowing through the heat recovery circulation path 613 passes through the inside of the plate heat exchanger 103 and is led to the bath pump inlet pipe 626 through the plate four-way valve 251. At this time, the water stored inside the tank 101 is heated by the water flowing through the heat recovery circulation path 613 inside the plate heat exchanger 103. Thus, the feedwater preheating operation by the heat pump unit 30 is performed.

  At the time of pouring (water filling operation) into the bathtub 50 already described, the water in the tank 101 is heated using the heat of the heating operation of the first liquid heat exchanger 301 of the heat pump unit 30 ( Feed water preheating operation). Further, the water in the tank 101 heated by the water supply preheating operation is used for heating the bathroom by the high-temperature heating device 401 and for pouring water in the bathtub 50. As described above, the control device 70 according to the present embodiment can execute the water supply preheating operation of heating the water in the tank 101 by the heating operation of the heat pump unit 30, and at the same time, the water heated in the tank 101 is It is possible to execute a heat storage hot water filling operation leading to the combustion device 201 and leading to the bathtub 50. Thereby, a highly efficient pouring operation can be realized.

  As described above, the control device 70 of the present embodiment performs the heating operation of the high-temperature heating device 401 by executing the combustion operation of the combustion device 201, and performs the heating operation of the high-temperature heating device 401. The control is performed to supply the heat of the stored water to the high temperature heater 401 and supply the remaining heat after being supplied to the high temperature heater 401 to the water inside the bathtub 50.

  According to this, the control device 70 performs the filling operation of the bathtub 50 while heating the bathroom using a large amount of heat preferentially supplied to the high-temperature heating device 401. Therefore, the user can bathe comfortably in the warm bathroom early. Further, the control device 70 performs the pouring operation of the bathtub 50 while heating the bathroom with the high-temperature heating device 401. Therefore, it is possible to perform heating of the bathroom, which takes more time than pouring time, continuously at the pouring operation. Therefore, the user can enjoy a comfortable bath in the early heated bathroom in the winter. Furthermore, after the heat of the water heated in the combustion device 201 is supplied to the high temperature heating device 401, the remaining heat is supplied to the water inside the bath 50, so that the water flowing through the pipeline of the high temperature heating device 401 The flow is opposite to the flow of water in the pipeline of the high temperature heating device 401 by normal heating operation. That is, in the operation shown in FIG. 19, water flows from the cistern 237 toward the bathtub 50 through the high-temperature heating device 401. Therefore, for example, even when foreign matter such as dust contained in water inside the bathtub 50 adheres to the pipeline of the high-temperature heating device 401 during the normal heating operation, it adheres to the pipeline of the high-temperature heating device 401 Foreign matter can be discharged to the outside of the high-temperature heating device 401 at the time of filling operation. Therefore, the high temperature heating device 401 can be kept clean.

  The control device 70 may stop the combustion operation of the combustion device 201 immediately before the end of the pouring operation and supply the water supplied from the water supply source to the high-temperature heating device 401. In this case, unheated water (cold water) is led to the high-temperature heating device 401. Thereby, the water of about 80 ° C. present in the high-temperature heating device 401 and the cistern 237 is pushed out by the cold water supplied from the water supply source and is led to the bath 50 as the water of about 45 ° C. Therefore, a highly efficient pouring operation can be realized. Further, in this case, the control device 70 performs the combustion of the combustion device 201 at a timing based on the capacity of the pipe line (water pouring piping) going from the tank portion 10 to the bathtub 50 through the combustion device 201 and the high temperature heating device 401. Operation may be resumed to heat the water supplied from the water source. In this case, even when the water at about 80 ° C. present in the high-temperature heating device 401 or the cistern 237 is extruded with cold water, the heated water can be disposed in the vicinity of the combustion device 201. Therefore, even when hot water is supplied by, for example, a shower or a water faucet, it is possible to suppress discharge of cold water from the shower or the water faucet.

  Further, while the hot water heating system 2 moves from the high temperature heating operation and the second reheating operation to the high temperature heating operation and the second pouring operation, the control device 70 keeps the heat pump unit 30 continuously operating. The water level inside the bathtub 50 may be detected by the water level sensor 255. When detecting the water level inside the bathtub 50 by the water level sensor 255, the control device 70 stops the combustion operation of the combustion device 201 while continuing the heating operation of the heat pump unit 30, and drives the bath pump 235. Control is performed to stop and open the defrost valve 308 of the heat pump unit 30. Thereby, even when the operation of the hot water supply and heating system 2 switches from the reheating operation to the pouring operation, the heating operation of the heat pump unit 30 is continued. Therefore, it can suppress that the efficiency of the heat pump part 30 falls. In addition, the control device 70 stops the combustion operation of the combustion device 201, stops the driving of the bath pump 235, and opens the defrost valve 308 of the heat pump unit 30, thereby suppressing the movement of water in the pipeline. it can. Thus, the water level sensor 255 can detect the water level inside the bathtub with high accuracy.

  Note that the control device 70 executes control to open the solenoid valve 264 and the low-temperature capability switching valve 263 when performing the operation shown in FIG. Thus, the inside of the first heating forward pipe 617 is the heating bypass pipe 618, the outlet pipe 616 of the first liquid heat exchanger 301, the inlet pipe 608 of the bath heat exchanger 207, and the bath heat exchanger 207. The system controller 237 is opened from the cistern 237 via the outlet pipe 609 of the first low temperature capacity pipe 632, the second low temperature capacity pipe 633, and the third low temperature capacity pipe 634. Even when the overflow valve 239 is closed, the inside of the first heating feed pipe 617 is opened via the cistern 237, the high-temperature heating device 401, and the bathtub 50. Therefore, even if the temperature of the water flowing through the heat recovery circulation path 613 rises and the water expands, the pressure inside the heat recovery circulation path 613 can be released from the cistern 237. Therefore, the application of excessive pressure to the inside of the heat recovery circulation path 613 can be suppressed.

[High-temperature heating operation + second repelling operation]
FIG. 20 is a view for explaining the high-temperature heating operation and the second reheating operation of the hot water supply and heating system according to the present embodiment.
The operation to be described with reference to FIG. 20 is a hot water heating and heating system 2 according to the present embodiment, in the winter, heating the bathroom and driving the water in the bath to bathe comfortably in the warm bathroom in the shortest time. It relates to the process of control that can be done.

  For example, when the user tries to take a bath in a bathroom heated in winter, the gas boiling unit 20 and the heat pump unit 30 can perform the water filling operation and the reheating operation of the bathtub 50 with the maximum ability. On the other hand, the maximum capacity of the heating device (for example, the high-temperature heating device 401) of the bathroom may be the rate-limiting function. Then, it may take time to bring the bathroom to a comfortable temperature. For this reason, in winter, it takes time to prepare for a comfortable bathing in a heated and warm bathroom.

  For example, when the water in the bathtub 50 is to be drained, the hot water is sent from the third bath forward pipe 622 into the bathtub 50. The temperature of the hot water at this time is measured by a bath going thermistor 257. Also, for example, the hot water for reheating heated by the combustion device 201 and the heat pump unit 30 is from the outlet pipe 609 of the bath heat exchanger 207 to the first bath passing pipe 619 side and the first low-temperature capacity pipe. There are cases where it branches into two flows of the 632 side and is sent into the bathtub 50 from the third bath forward pipe 622.

  In this case, a part of the hot water for reheating passes from the outlet pipe 609 of the bath heat exchanger 207 through the first bath passing pipe 619 and the high-temperature heating device 401 as one stream to the cistern 237. Sent. In addition, the other part of the hot water for reheating is, as the other stream, from the outlet pipe 609 of the bath heat exchanger 207, the first low-temperature capacity pipe 632, the low-temperature capacity switching valve 263, and the second low-temperature Through the capacity tube 633 and the third low-temperature capacity tube 634, the system enters the sturn 237.

  Therefore, in this case, the slightly cooled hot water returning from the high-temperature heating device 401 to the cistern 237 and the hot water having passed through the low-temperature capability switching valve 263 mix with each other in the cistern 237. The mixed hot water is sent from the third bath feed pipe 622 into the bath 50 through the cistern outlet pipe 629 and the second bath feed pipe 621. Thus, the hot water for reheating may be mixed in the cistern 237 after being branched into two streams from the outlet pipe 609 of the bath heat exchanger 207.

  However, as described above, the hot water for reheating is mixed in the cistern 237 and then supplied to the bathtub 50 after it is branched into two streams from the outlet pipe 609. Therefore, if the distance between the cistern 237 and the bath-tripping thermistor 257 is long, hunting may easily occur with respect to the reheating temperature.

  In order to suppress the occurrence of hunting, the control device 70 finely adjusts the control of the opening degree of the low-temperature capability switching valve 263 slowly, and controls the amount of heat supplied to the high-temperature heating device 401 and the amount of heat supplied for reheating. There is a need to. However, if this is done, there is a risk that it will take time for the reheating operation.

  On the other hand, in the hot water supply and heating system 2 of the present embodiment, as illustrated in FIG. 20, the control device 70 heats the bathroom by the high-temperature heating device 401 and repels water in the bathtub 50. Under the present circumstances, the control apparatus 70 performs control which supplies the water of the inside of the bathtub 50, after supplying the heat of the water heated in the heat pump part 30 and the combustion apparatus 201 to the high temperature heating apparatus 401. Therefore, more heat can be preferentially supplied to the high-temperature heating device 401. Thus, in the winter, by heating water in the bath while heating the bathroom, the user can take a comfortable bath in the warm bath early.

In FIG. 20, the hot water in the bathtub 50 is driven away by the combustion operation of the combustion apparatus 201 and the heating operation of the heat pump unit 30 (combination of gas and heat pump unit), and the combustion operation of the combustion apparatus 201 and the heating operation of the heat pump unit 30. The user can bathe comfortably with the hot water in the bathtub 50 in the warm bathroom in the shortest time by heating the inside of the bathroom to high temperature (combination of gas and heat pump section) by the heat generated from the high temperature heating device 401 It shows.
As shown in FIG. 20, the control device 70 starts driving the bath pump 235, sets the solenoid valve 248 in the “open” state, sets the solenoid valve 258 in the “open” state, and switches the low temperature capability switching valve 263. Is set to the "closed" state. The solenoid valve 258 of the present embodiment corresponds to the “solenoid valve” of the present invention.

  In FIG. 20, in the reheating operation, the water (hot water) led from the bath 50 is heated using the combustion device 201 and the heat pump unit 30 of the gas boiling unit 20. For example, when the user presses the repelling button (not shown) with water remaining in the inside of the bathtub 50, the control device 70 causes the temperature of the water inside the bathtub 50 to match the set temperature. Execute control of reheating operation.

  When the control device 70 executes control of the reheating operation, the bath pump 235 is driven. Then, the water in the inside of the bath 50 is discharged from the first bath return pipe 623 connected to the bath 50, the second bath return pipe 624, the solenoid valve 248, the third bath return pipe 625, and the four sides of the plate. Through the valve 251, flows through the bath pump outlet pipe 614 through the bath pump 235. At this time, the temperature of water is, for example, about 15 ° C.

  Water flowing through the bath pump outlet pipe 614 is led to the inlet pipe 615 of the first liquid heat exchanger 301 via the heat pump inlet three-way valve 243. The water led to the inlet pipe 615 of the first liquid heat exchanger 301 flows through the inner pipe 352 and the outlet pipe 616 of the first liquid heat exchanger 301 and is led to the inlet pipe 608 of the bath heat exchanger 207. .

  At this time, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the reheating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the reheating operation, the second liquid heat exchanger 302 functions as a cooler. Therefore, the water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 30 ° C. or so.

  The water led to the inlet pipe 608 of the bath heat exchanger 207 is heated in the bath heat exchanger 207. The temperature of the water heated in the bath heat exchanger 207 is, for example, about 90.degree. A portion of the water heated in the bath heat exchanger 207 flows through the outlet pipe 609 of the bath heat exchanger 207 and passes through the first bath forward pipe 619 and the first high temperature heating forward pipe 627 to reach a high temperature. The heating device 401 is entered. Thus, an operation of heating the bathroom (high temperature heating operation by the high temperature heating device 401) is performed. The hot water that has passed through the high-temperature heating device 401 flows through the heating return pipe 628 through the liquid junction portion 405 and is led to the cistern 237. The temperature of the error introduced to the cistern 237 is, for example, about 45.degree. The water in the cistern 237 reaches the mixing section R via the cistern outlet pipe 629 and the bath return four-way valve 249. The overflow valve 239 of the cistern 237 is not open to the atmosphere as a closed state (closed system).

  In addition, the other part of the water heated, for example, at 90 ° C. in the bath heat exchanger 207 includes the first bath feed pipe 619, the bath feed three-way valve 246, and the first high-temperature heating feed pipe 627. Then, it branches at the branch portion H. The water branched at the branch portion H passes through the bathtub bypass pipe 631 and the solenoid valve 258 and reaches the mixing portion R.

  Thus, for example, water of 90 ° C. heated in the bath heat exchanger 207 and water of about 45 ° C. led from the cistern 237 are mixed in the mixing section R. That is, the control device 70 includes water passing through the high-temperature heating device 401 and the cistern 237 (return water of about 45 ° C. from the high-temperature heating device 401) and water going to the bath 50 (hot water of about 90 ° C.) The control of mixing in the mixing section R is performed before supplying the water to the bath 50. The temperature of the water (water for reheating) mixed in the mixing section R is, for example, about 60 ° C. or more and about 80 ° C. or less. For example, the water for reheating at 70 ° C. is supplied to the inside of the bathtub 50 through the second bath traveling pipe 621 and the third bath traveling pipe 622 so as to chase the water in the bathtub 50. be able to.

  Here, the control device 70 sets the opening degree of the solenoid valve 258 based on the temperature in the bathroom, the space volume in the bathroom, the temperature of the water in the bath 50, and the volume of the water in the bath 50. adjust. Thereby, the control device 70 can adjust the mixing ratio of the amount of water heated, for example, at 90 ° C. in the bath heat exchanger 207 and the amount of water of about 45 ° C. led from the cistern 237. it can. Thereby, the user can bathe comfortably in the warm bathroom at the shortest.

As shown in FIG. 20, a second bath-traveling tube 621 is provided with a second bath-traveling thermistor 257. The second bath-traveling thermistor 257 detects the temperature of the water flowing through the second bath-traveling pipe 621. The mixing unit R is provided in the vicinity of the second bath-traveling thermistor 257. For this reason, since the position of the mixing unit R and the position of the second bath-traveling thermistor 257 are close to each other, the control device 70 can suppress the occurrence of hunting in the control of the temperature of the water for reheating.
Thus, in the hot water supply and heating system 2 according to the present embodiment, for example, water at 90 ° C. heated in the bath heat exchanger 207 does not pass through the low temperature capability switching valve 263. Therefore, the control device 70 does not have to control the opening degree of the low-temperature capability switching valve 263.

  In the hot water supply and heating system 2 shown in FIG. 20, the hot water from the outlet pipe 609 of the bath heat exchanger 207 can be used simultaneously for heating by the high-temperature heating device 401 and reheating into the bathtub 50. . Then, the hot water supply and heating system 2 shown in FIG. 20 preferentially sends the heat of hot water heated in the heat pump unit 30 and the combustion apparatus 201 to the high temperature heating apparatus 401. For this reason, the heat of the hot water obtained by the combustion device 201 is first supplied to the high temperature heating device 401 side, and thereafter, is supplied to the hot water in the bathtub 50.

  Thereby, more heat can be preferentially supplied to the high temperature heating device 401. For this reason, the user can take a comfortable bath in the warm bathroom early by chasing the water in the bathtub 50 while heating the bathroom using a large amount of heat supplied preferentially.

  In addition, the control device 70 mixes the water which has passed through the high-temperature heating device 401 (return hot water from the high-temperature heating device 41) and the water heading for the bathtub 50 (high-temperature water) to the mixing unit R. Mix in In other words, the control device 70 mixes the water that has passed through the high-temperature heating device 401 (return water from the high-temperature heating device 401) and the water that travels to the bathtub 50 (high-temperature water), and then mixes the mixed water Supply to 50. Therefore, the temperature of the water supplied to the bath 50 can be controlled with relatively high accuracy.

  Further, the control device 70 performs control of mixing the water that has passed through the high-temperature heating device 401 and the cistern 237 and the water heading for the bathtub 50 before supplying the water to the bathtub 50. That is, the control device 70 mixes the water that has passed through the high-temperature heating device 401 and the water that travels to the bathtub 50 in the mixing unit R on the bathtub 50 side as viewed from the cistern 237 instead of the cistern 237. Therefore, the control device 70 may mix the water passing through the high-temperature heating device 401 and the water heading for the bathtub 50 near the second bath going thermistor 257 that detects the temperature of the water supplied to the bathtub 50. it can. Therefore, the temperature of the water supplied to the bath 50 can be controlled with higher accuracy. Therefore, the user can bathe comfortably in the warm bath earlier.

Next, a second embodiment of the present invention will be described.
[Feature 1: Miniaturization]
The hot water supply heating system 2A of the present embodiment includes a tank unit 10A, a gas water heater 20A, a heat pump unit 30, a heating device 40, and a bathtub 50. The tank unit 10A is connected to the gas boiling unit 20A by a pipe. The gas boiling unit 20A is connected to the heat pump unit 30, the heating device 40, and the bathtub 50 by pipes. The heat pump unit 30 is connected by a pipe to the heating device 40 via the gas boiler 20A. On the other hand, the heating device 40 is not connected to the bathtub 50 by a pipe. That is, the heating path (pipe of the heating system) and the bathtub path (pipe of the bathtub system) are separated from each other. In this point, the hot water supply heating system 2A of the present embodiment is different from the hot water supply heating system 2 described above with reference to FIG. Thereby, hot water supply heating system 2A of this embodiment can control that dirty water in heating device 40 mixes into bath water more certainly.

In addition, by controlling extra heat or hot water present in a given device to other devices (that is, exchanging heat), the device is miniaturized.
Thus, the high-efficiency hot water supply heating system 2A can be used even in an apartment or a small house with a small space.
Then, for example, by connecting the gas boiling unit 20A to the tank unit 10A, the heat pump unit 30, the heating device 40, and the bathtub 50 with a pipe or the like, it is possible to circulate hot water between the respective devices. As a result, "improvement of functionality,""improvement of efficiency,""improvement of comfort," and "cost reduction" can be further achieved. This will be described below.

[Feature 2: Improvement of functionality]
In the present embodiment, the functionality is improved.
For example, the hot water supply heating system 2A according to the present embodiment sends the remaining water of the bath tub 50 to the bath heat exchanger 207A, and transmits the water of the tank unit 10A to the bath heat exchanger 207A, and the remaining hot water of the bath tub 50 and the tank By heat exchange with the water of the part 10A, it has a "hot water heat recovery function" capable of recovering the heat of the residual hot water to the tank part 10A. According to this function, it is possible to save the waste of energy, to create warm water in the tank unit 10A, and to cool the remaining hot water of the bath 50 to suppress the proliferation of bacteria.

  In addition, the tank unit 10A of the present embodiment is so small that it can be accommodated, for example, on a pipe shaft of an apartment. Therefore, when the hot water in the tank unit 10A reaches a predetermined temperature, the hot water is circulated to another device and used, and in the tank unit 10A, new hot water can be generated one after another as much as possible. In this way, the same function as a large hot water storage tank is exhibited. For example, the hot water supply and heating system 2A according to the present embodiment has a “waste heat recovery function” that generates hot water in the tank unit 10A using the waste heat at the time of the cooling operation of the heat pump unit 30. At the time of this waste heat recovery, when the hot water of the tank unit 10A reaches the reference temperature when the hot water reservation is made, the hot water of the tank unit 10A is sent to the bathtub 50 first. Then, when the hot water in the tank unit 10A drops to a predetermined amount, the operation of generating hot water in the tank unit 10A again using the waste heat recovery function and repeating the hot water again to the bathtub 50 is repeated. As a result, even in the small-sized tank unit 10A, the bathtub 50 can be filled with a predetermined amount of water.

[Feature 3: Improvement of efficiency]
Next, in the present embodiment, the efficiency of each device is improved.
For example, the efficiency improvement at the time of starting of the heat pump part 30 is aimed at. That is, when the heat pump unit 30 is stopped, the outdoor gas heat exchanger 303 becomes a cooler, and the heat medium in the gas heat exchanger 303 becomes liquid. In this case, it takes time for the next start and the efficiency is degraded. Therefore, the structure or control for preventing the liquefaction of the heat medium in the gas heat exchanger 303 is adopted to improve the efficiency of the heat pump unit 30. The means for preventing the liquefaction of the heat medium is the same as the improvement of the efficiency of the hot water supply and heating system 2 described above with reference to FIG. Details of the improvement of the efficiency will be described later.

  Further, in the present embodiment, the efficiency is also improved by suppressing the amount of natural heat radiation in the conduit. The improvement of the efficiency is also similar to the improvement of the efficiency of the hot water supply and heating system 2 described above with reference to FIG.

Further, in the present embodiment, it is possible to increase the efficiency of the heat pump unit 30, which is highly efficient to operate at full power, by feeding a low temperature liquid into the heat pump unit 30.
For example, since heating is insufficient with only the heat pump unit 30, when heating using both the heat pump unit 30 and the gas boiling unit 20A, the heat pump unit 30 first heats. Thereafter, in order to apply a predetermined amount of heat, heat exchange is performed in the third liquid heat exchanger 272 of the gas boiler 20A. Thereby, the liquid of the low feed water temperature is fed into the heat pump unit 30, and the efficiency can be increased.

  Moreover, when keeping warm the hot water of the bathtub 50, it is ideal to keep heat using heat of the heat pump part 30 in consideration of efficiency. However, when the hot water is fed into the heat pump unit 30, the high efficiency of the heat pump unit 30 is torn down. Therefore, after the water in the tank unit 10A is turned to the third liquid heat exchanger 272 and heat is removed by the water in the tank unit 10A to generate warm water, a liquid with a low feed water temperature is sent to the heat pump unit 30. Thereby, the efficiency of the heat pump unit 30 can be increased.

[Feature 4: Improvement of comfort]
Next, in the present embodiment, improvement of comfort is achieved.
For example, in the present embodiment, a shower can be taken in a cool bathroom in summer. You can also take a bath in the warm bathroom in winter. This makes it possible to prevent strokes and heart attacks that occur due to differences in temperature. The improvement of the comfort is similar to the improvement of the comfort of the hot water heating system 2 described above with reference to FIG. Details of the improvement of the comfort will be described later.

[Feature 5: Avoiding troubles]
As described above, in the embodiment of the present invention, “miniaturization”, “functional improvement”, “efficiency improvement”, and “comfortability improvement” are intended, but such configuration and / or control is performed. As a result, various problems may occur. Therefore, in the present embodiment, further configuration or control is performed to avoid the trouble.

  For example, when the heat pump unit 30 is installed in a pipe shaft of a condominium, if the generated drain water is discharged as it is like a normal outdoor unit, the corridor or the like may get wet through the pipe shaft. In this respect, in the present embodiment, the heat pump unit 30 and the drainage port of the bathroom are connected by a pipe so that the generated drain water is drained into the drainage port.

  Also, in the present embodiment, the heating path and the bathtub path are separated from each other. Therefore, it is not necessary to carry out unused equipment and water replacement in the pipe. In this point, the hot water supply heating system 2A of the present embodiment is different from the hot water supply heating system 2 described above with reference to FIG.

Second Embodiment
FIG. 21 is a piping diagram showing a hot water supply and heating system according to a second embodiment of the present invention.
As shown in FIG. 21, the hot water supply and heating system 2A according to the present embodiment includes a tank unit 10A, a gas boiling unit 20A, a heat pump unit 30, a heating device 40, and a control device 70. The tank unit 10A, the gas boiling unit 20A, the heat pump unit 30, and the control device 70 are provided inside the case 21 and the case 33 shown in FIG. The housing 21 and the housing 33 are as described above with reference to FIG. Further, the heat pump unit 30, the heating device 40 and the control device 70 are respectively the same as the heat pump portion 30, the heating device 40 and the control device 70 provided in the hot water supply and heating system 2 described above with reference to FIGS.

  The tank unit 10A has a tank 101 and a pressure reducing valve 102. As compared with the tank unit 10 of the hot water supply heating system 2 described above with reference to FIGS. 2 to 18, the tank unit 10 </ b> A of the present embodiment does not have a plate heat exchanger. On the other hand, in the hot water supply and heating system 2A according to the present embodiment, the gas boiler 20A includes the third liquid heat exchanger 272. Details of the third liquid heat exchanger 272 will be described later.

  On the downstream side of the pressure reducing valve 102, the water supply pipe 151 is connected to the lower part of the tank 101, and branches at the lower part of the tank 101, via a recovery switching four-way valve 285, a first water supply connection pipe 667; It is connected to the second water supply connection pipe 668 and the second recovery pump inlet pipe 666. The first water supply connection pipe 667 is connected to the outlet pipe 607 of the hot water supply heat exchanger 206A and the connection pipe 651 of the third liquid heat exchanger 272 via the water supply switching three-way valve 277. A hot water inlet pipe 153 and a recovery pump outlet pipe 659 are connected to the upper portion of the tank 101. The other structure of the tank unit 10A is the same as the structure of the tank unit 10 described above with reference to FIG.

  An overpressure relief valve (not shown) is provided in the tank 101 of the hot water supply and heating system 2A according to the present embodiment. The overpressure relief valve operates to automatically open when a predetermined pressure or more is applied. That is, the overpressure relief valve does not perform the opening / closing operation based on the signal transmitted from the control device 70. In this respect, the overpressure relief valve provided in the tank 101 differs from the overflow valve 239 provided in the cistern 237.

  The gas heater 20A includes a combustion device 201, a neutralizer 231, a drain tank 233, a bath pump 235, a recovery pump 236, a cistern 237, a bath heat exchanger 207A, and a third liquid heat exchanger. 272 and a heating pump 275. That is, in comparison with the gas boiler 20 of the hot water supply heating system 2 described above with reference to FIGS. 2 to 18, the gas boiler 20A of the present embodiment includes the third liquid heat exchanger 272 and the heating pump 275. Furthermore, it has. Further, the bath heat exchanger 207A is provided not on the combustion chamber 202 of the combustion device 201 but on the outside of the combustion chamber 202 of the combustion device 201.

  In the combustion chamber 202 of the combustion apparatus 201, a first burner 203, a second burner 204, a hot water supply latent heat exchanger 205, and a hot water supply heat exchanger 206A are provided. The first burner 203 and the second burner 204 are provided in the vicinity of the hot water supply heat exchanger 206A, and heat the hot water supply heat exchanger 206A. The hot water supply heat exchanger 206A has a large number of fins and is heated by at least one of the first burner 203 and the second burner 204. The hot water supply latent heat exchanger 205 is provided above the hot water supply heat exchanger 206A, and recovers the latent heat contained in the exhaust gas of the combustion chamber 202. That is, the hot water supply latent heat heat exchanger 205 is provided at a position in contact with the combustion exhaust after the hot water supply heat exchanger 206A performs heat exchange by the combustion of at least one of the first burner 203 and the second burner 204. ing.

  The third liquid heat exchanger 272 includes the water (liquid) led to the inside of the third liquid heat exchanger 272 through the connection pipe 651 of the third liquid heat exchanger 272 and the first liquid heat. Heat exchange can be performed without contact with the water (liquid) introduced from the exchanger 301 to the inside of the third liquid heat exchanger 272. Alternatively, the third liquid heat exchanger 272 is led to the inside of the third liquid heat exchanger 272 through an intermediate pipe 653 connected to the third liquid heat exchanger 272 and the bath heat exchanger 207A. Heat exchange can be carried out without contact between the water (liquid) and the water (liquid) introduced from the first liquid heat exchanger 301 to the inside of the third liquid heat exchanger 272. That is, inside the third liquid heat exchanger 272, the first inner pipe 652 of the third liquid heat exchanger 272 connected to the connection pipe 651 and the intermediate pipe 653 is the first liquid heat exchanger 301. It is thermally connected to the second inner pipe 654 of the third liquid heat exchanger 272 connected to the outlet pipe 616 of the The third liquid heat exchanger 272 is a so-called liquid-liquid heat exchanger.

  The bath heat exchanger 207A is led from the bath 50 to the inside of the bath heat exchanger 207A, with the water (liquid) led to the inside of the bath heat exchanger 207A through the connection pipe 655 of the bath heat exchanger 207A. Non-contact heat exchange can be performed with water (liquid). Alternatively, the bath heat exchanger 207A and the water (liquid) led to the inside of the bath heat exchanger 207A through the intermediate pipe 653 connected to the third liquid heat exchanger 272 and the bath heat exchanger 207A. The heat exchange can be performed in a non-contact manner with the water (liquid) led from the bath 50 to the inside of the bath heat exchanger 207A. That is, inside the bath heat exchanger 207A, the first inner pipe 656 of the bath heat exchanger 207A connected to the intermediate pipe 653 and the connection pipe 655 is connected to the bath pump outlet pipe 614. And the second inner pipe 657 of the Unlike the bath heat exchanger 207 described above with reference to FIG. 2, the bath heat exchanger 207A is a so-called liquid-liquid heat exchanger.

  As described above for the tank unit 10A, the first water supply connection pipe 667 is connected to the outlet pipe 607 of the hot water supply heat exchanger 206A and the connection pipe 651 of the third liquid heat exchanger 272 via the water supply switching three-way valve 277. And connected to. The connection pipe 651 of the third liquid heat exchanger 272 includes a first inner pipe 652 of the third liquid heat exchanger 272, an intermediate pipe 653, and a first inner pipe 656 of the bath heat exchanger 207A. Are connected to the connection pipe 655 of the bath heat exchanger 207A.

  A connecting pipe thermistor 288 is provided in the connecting pipe 651 of the third liquid heat exchanger 272. The connecting pipe thermistor 288 detects the temperature of water flowing through the connecting pipe 651 of the third liquid heat exchanger 272. An intermediate piping thermistor 291 is provided in the intermediate piping 653. The middle pipe thermistor 291 detects the temperature of the water flowing through the middle pipe 653. A bath switching valve 278 and a bath heat exchanger thermistor 292 are provided in the connection pipe 655 of the bath heat exchanger 207A. The bath switching valve 278 adjusts the opening degree of the valve and controls the flow rate of water flowing through the connection pipe 655 of the bath heat exchanger 207A. The bath heat exchanger thermistor 292 detects the temperature of water flowing through the connection pipe 655 of the bath heat exchanger 207A.

  A hot water supply incoming pipe 661 branched from the outlet pipe 607 of the hot water supply heat exchanger 206A is connected to the outlet pipe 607 of the hot water supply heat exchanger 206A. The hot water supply incoming pipe 661 is connected to the first pouring pipe 643 via the hot water amount servo 224. Between the connection portion between the hot water supply forward pipe 661 and the outlet pipe 607 of the hot water supply heat exchanger 206A and the hot water amount servo 224, the hot water supply forward pipe 661 is connected with the bath heat exchanger 207A branched from the hot water supply forward pipe 661 The pipe 655 is connected. That is, the connection pipe 655 of the bath heat exchanger 207A is connected to the hot water supply receiving pipe 661 at one end, and is connected to the first inner pipe 656 of the bath heat exchanger 207A at the other end. Further, between the connection portion of the hot water supply forward pipe 661 and the outlet pipe 607 of the hot water supply heat exchanger 206A and the hot water amount servo 224, the hot water supply pipe 661 has a hot water supply bypass pipe 611 branched from the hot water supply forward pipe 661. It is connected.

  A first recovery pump inlet pipe 658 branched from the intermediate pipe 653 is connected to the intermediate pipe 653. The first recovery pump inlet pipe 658 is connected to the recovery pump 236 via a first recovery three-way valve 282. Further, a circulating water amount sensor 274 is provided in the first recovery pump inlet pipe 658. The circulating water amount sensor 274 detects the flow rate of water flowing through the first recovery pump inlet pipe 658.

  As described above, the water supply pipe 151 is connected to the second recovery pump inlet pipe 666 via the recovery switching four-way valve 285. The second recovery pump inlet line 666 is connected to the first recovery pump inlet line 658 via a first recovery three-way valve 282. As indicated by arrows A26 and A27 shown in FIG. 21, when the recovery pump 236 is driven, water flows through the second recovery pump inlet pipe 666, and the first recovery is performed via the first recovery three-way valve 282. It may be led to the pump inlet pipe 658.

  Further, as described above, the water supply pipe 151 is connected to the second water supply connection pipe 668 via the recovery switching four-way valve 285. The second feed water connection pipe 668 is provided with a check valve 286.

  As described above with respect to the tank unit 10A, the collection pump outlet pipe 659 is connected to the top of the tank 101. The recovery pump outlet pipe 659 is connected to the inlet pipe 356 of the second liquid heat exchanger 302 via a second recovery three-way valve 283. Also, the recovery pump outlet pipe 659 is connected to the outlet pipe 355 of the second liquid heat exchanger 302 via a third recovery three-way valve 284. The recovery pump outlet pipe 659 is provided with a tank inlet thermistor 293. The tank inlet thermistor 293 detects the temperature of the water flowing through the collection pump outlet pipe 659.

  The heating pump 275 is connected with a cistern outlet pipe 629 and a heating pump outlet pipe 662. The heating pump outlet pipe 662 is connected to the inlet pipe 615 of the first liquid heat exchanger 301 via the heat pump inlet three-way valve 243. The outlet pipe 616 of the first liquid heat exchanger 301 is connected to the outlet pipe 664 of the third liquid heat exchanger 272 via the second inner pipe 654 of the third liquid heat exchanger 272.

  The outlet pipe 616 of the first liquid heat exchanger 301 is provided with an outlet thermistor 312 and an inlet thermistor 287. The exit thermistor 312 is as described above with respect to FIG. The inlet thermistor 287 detects the temperature of water flowing through the outlet pipe 616 of the first liquid heat exchanger 301 and immediately before flowing into the third liquid heat exchanger 272. A heating high temperature thermistor 289 is provided at the outlet pipe 664 of the third liquid heat exchanger 272. The heating high temperature thermistor 289 detects the temperature of the water flowing through the outlet pipe 664 of the third liquid heat exchanger 272.

  To the outlet pipe 664 of the third liquid heat exchanger 272, a first low-temperature capacity pipe 632 branched from the outlet pipe 664 of the third liquid heat exchanger 272 is connected. The first low-temperature capacity pipe 632 is provided with a low-temperature capacity switching valve 263 and connected to a second low-temperature capacity pipe 633 branched from the first low-temperature capacity pipe 632. And, the second low temperature capacity tube 633 is connected to the cistern 237. Further, the first low-temperature capacity pipe 632 is provided with a makeup water solenoid valve 276. As indicated by arrows A21 and A22 shown in FIG. 21, the makeup water solenoid valve 276 adjusts the opening degree of the valve to control the flow rate of water supplied to the cistern 237. Further, as indicated by arrows A23, A24 and A25 shown in FIG. 21, the water overflowing from the cistern 237 is discharged to the outside of the hot water supply heating system 2A. The overflow valve 239 is not provided in the system 237 of the hot water supply and heating system 2A according to the present embodiment.

  A heat pump outlet three-way valve 244A is provided at the connection between the outlet pipe 616 of the first liquid heat exchanger 301 and the first heating feed pipe 617. The heat pump outlet three-way valve 244A may take an intermediate position, unlike the heat pump outlet three-way valve 244 described above with reference to FIG. That is, the heat pump outlet three-way valve 244A has a state in which the water flowing through the first liquid heat exchanger 301 is guided to the third liquid heat exchanger 272, a state in which the water is guided to the first heating forward pipe 617, and It is possible to switch between the state of being led to both of the third liquid heat exchanger 272 and the first heating incoming pipe 617.

  The first heating feed pipe 617 is connected to the outlet pipe 664 of the third liquid heat exchanger 272, the second heating feed pipe 635, and the first heating bypass pipe 663 through the heat storage four-way valve 279. It is connected. To the outlet pipe 664 of the third liquid heat exchanger 272, a first high-temperature heating return pipe 627 branched from the outlet pipe 664 of the third liquid heat exchanger 272 is connected. The first high-temperature heating return pipe 627 is a first heating bypass pipe between the connection of the third liquid heat exchanger 272 to the outlet pipe 664 and the connection of the second high-temperature heating return pipe 451. Connected to 663.

  A second heating bypass pipe 665 is connected to the outlet pipe 616 of the first liquid heat exchanger 301 between the heat pump outlet three-way valve 244A and the inlet thermistor 287. The second heating bypass pipe 665 is connected to the heating pump outlet pipe 662 and the inlet pipe 615 of the first liquid heat exchanger 301 via the heat pump inlet three-way valve 243.

  The third pouring pipe 645 is connected to the bath pump inlet pipe 626, the second bath return pipe 624, and the bath bypass pipe 631 via the solenoid valve 281. The bath pump outlet pipe 614 is connected to the second bath forward pipe 621 via the second inner pipe 657 of the bath heat exchanger 207A. The second bath return pipe 624 is provided with a bath flow switch 253, a bath return thermistor 254, and a water level sensor 255. The bath flow switch 253 and the bath return thermistor 254 are as described above with reference to FIG.

  As indicated by arrows A32, A24, and A25 shown in FIG. 21, the drain overflowing from the drain tank 233 is discharged to the outside of the hot water heating system 2A. The other structure of the gas boiler 20A is the same as the structure of the gas boiler 20 described above with reference to FIG.

Next, mutual connection among the tank unit 10A, the gas boiling unit 20A, the heat pump unit 30, the heating device 40, and the bathtub 50 will be described with reference to the drawings.
In the hot water supply heating system 2A according to the present embodiment, the tank unit 10A is connected to the gas boiling unit 20A by a pipe. The gas boiling unit 20A is connected to the heat pump unit 30, the heating device 40, and the bathtub 50 by pipes. The heat pump unit 30 is connected by a pipe to the heating device 40 via the gas boiler 20A. On the other hand, the heating device 40 is not connected to the bathtub 50 by a pipe. That is, the pipeline of the system of the heating device 40 and the pipeline of the system of the bathtub 50 are separated from each other. The pipeline of the bathtub system is provided as a system different from the pipeline of the heating system.

[Connection between gas water heater and bathtub]
First, the connection between the gas heater 20A and the bathtub 50 will be described. The pipeline described here is an example of a pipeline of a bathtub system that connects the gas boiling unit 20A and the bathtub 50. The outlet pipe 607 of the hot water supply heat exchanger 206A is connected to the hot water supply incoming pipe 661 branched from the outlet pipe 607 of the hot water supply heat exchanger 206A. The hot water supply incoming pipe 661 is connected to the first pouring pipe 643 via the hot water amount servo 224. The first pouring pipe 643 is connected to the second pouring pipe 644 via the pouring solenoid valve 266, the check valve 267, and the check valve 268.

  The second pouring pipe 644 is connected to the bath pump inlet pipe 626, the bathtub bypass pipe 631, and the second bath return pipe 624 via the solenoid valve 281. The bath pump inlet pipe 626 is connected to the bath pump outlet pipe 614 via the bath pump 235. The bath pump outlet pipe 614 is connected to the first bath forward pipe 619 via the second inner pipe 657 of the bath heat exchanger 207A. The first bathing pipe 619 is connected to a second bathing pipe 621 connected to the bath 50 via a circulation fitting (not shown). On the other hand, the second bath return pipe 624 is connected to a first bath return pipe 623 connected to the bath 50 via a circulation fitting (not shown).

[Connection between gas water heater and heating system]
[Connection between gas water heater and heat pump]
Subsequently, the connection between the gas boiling unit 20A and the heating device 40 and the connection between the gas boiling unit 20A and the heat pump unit 30 will be described. The pipeline described here is an example of a pipeline of a heating system that connects the gas boiling unit 20A and the heating device 40. As described above, the heat pump unit 30 is connected to the heating device 40 via the gas boiler 20A by a pipe line.

  A heating pump outlet pipe 662 is connected to the heating pump 275. The heating pump outlet pipe 662 is connected to the inlet pipe 615 of the first liquid heat exchanger 301 via the heat pump inlet three-way valve 243. The inlet pipe 615 of the first liquid heat exchanger 301 is connected to the outlet pipe 616 of the first liquid heat exchanger 301 via the inner pipe 352 of the first liquid heat exchanger 301.

  The outlet pipe 616 of the first liquid heat exchanger 301 is connected to the outlet pipe 664 of the third liquid heat exchanger 272 via the second inner pipe 654 of the third liquid heat exchanger 272. The outlet pipe 664 of the third liquid heat exchanger 272 is connected to a first high-temperature heating return pipe 627 branched from the outlet pipe 664 of the third liquid heat exchanger 272. The first high-temperature heating return pipe 627 is connected to a first heating bypass pipe 663 branched from the first high-temperature heating return pipe 627. The first heating bypass pipe 663 is connected to the second heating forward pipe 635 via the heat storage four-way valve 279. The second heating return pipe 635 is connected to the low temperature heating return pipe 453 via the low temperature return heating valve 241. The connection between the low temperature heating device 402 and the cistern 237 is as described above with reference to FIG. The cistern 237 is connected to the heating pump 275 via a cisturn outlet pipe 629.

  Further, as described above, the outlet pipe 664 of the third liquid heat exchanger 272 is connected to the first high-temperature heating return pipe 627 branched from the outlet pipe 664 of the third liquid heat exchanger 272. The first high-temperature heating return pipe 627 is connected to the second high-temperature heating return pipe 451. The connection between the high temperature heating device 401 and the cistern 237 is as described above with reference to FIG. The cistern 237 is connected to the heating pump 275 via a cisturn outlet pipe 629.

  Alternatively, the gas heater 20A is connected to the heating device 40 through the first heating feed pipe 617 that the gas heater 20A has. That is, the connection between the heating pump 275 and the outlet pipe 616 of the first liquid heat exchanger 301 is as described above. The outlet pipe 616 of the first liquid heat exchanger 301 is connected to the first heating feed pipe 617 via the heat pump outlet three-way valve 244A. The first heating feed pipe 617 is connected to the second heating feed pipe 635 via a heat storage four-way valve 279. The second heating return pipe 635 is connected to the low temperature heating return pipe 453 via the low temperature return heating valve 241. The connection between the low temperature heating device 402 and the cistern 237 is as described above with reference to FIG. The cistern 237 is connected to the heating pump 275 via a cisturn outlet pipe 629.

  Further, the first heating forward pipe 617 is connected to the outlet pipe 664 of the third liquid heat exchanger 272 via the heat storage four-way valve 279. As described above, it is connected to the first high-temperature heating return pipe 627 branched from the outlet pipe 664 of the third liquid heat exchanger 272. The first high-temperature heating return pipe 627 is connected to the second high-temperature heating return pipe 451. The connection between the high temperature heating device 401 and the cistern 237 is as described above with reference to FIG. The cistern 237 is connected to the heating pump 275 via a cisturn outlet pipe 629.

[Connection between tank and gas boiler]
Subsequently, the connection between the tank unit 10A and the gas boiling unit 20A will be described. The pipeline described here is an example of a pipeline of a tank system that connects the tank unit 10A and the gas boiling unit 20A. The tank unit 10A is connected to the combustion device 201 of the gas boiling unit 20A by a pipe line. That is, the mixed water introduction pipe 154 of the tank unit 10A is connected to the inlet pipe 604 of the hot water supply latent heat exchanger 205. The inlet pipe 604 of the hot water supply latent heat exchanger 205 may be the same pipe as the mixed water introduction pipe 154 of the tank portion 10A, or the pipe different from the mixed water introduction pipe 154 of the tank portion 10A It is also good. That is, the water flowing through the mixed water introduction pipe 154 of the tank portion 10A may be led to the inlet pipe 604 of the hot water supply latent heat exchanger 205.

  The inlet pipe 604 of the hot water supply latent heat exchanger 205 is connected to the outlet pipe 605 of the hot water supply latent heat exchanger 205. The outlet pipe 605 of the hot water supply latent heat exchanger 205 is connected to the inlet pipe 606 of the hot water supply heat exchanger 206A branched from the outlet pipe 605 of the hot water supply latent heat heat exchanger 205. The inlet pipe 606 of the hot water supply heat exchanger 206A is connected to the outlet pipe 607 of the hot water supply heat exchanger 206A.

  Further, the tank unit 10A is connected to the liquid heat exchanger 272 and the bath heat exchanger 207A of the gas boiling unit 20A by a pipe line. That is, the water supply pipe 151 connected to the lower part of the tank 101 is connected to the first water supply connection pipe 667 via the recovery switching four-way valve 285. The first water supply connection pipe 667 is connected to the intermediate pipe 653 via the first inner pipe 652 of the third liquid heat exchanger 272. The intermediate pipe 653 is connected to the connection pipe 655 of the bath heat exchanger 207A via the first inner pipe 656 of the bath heat exchanger 207A.

  The connection pipe 655 of the bath heat exchanger 207A is connected to a second water supply connection pipe 668 branched from the connection pipe 655 of the bath heat exchanger 207A. The second water supply connection pipe 668 is connected to the second collection pump inlet pipe 666 via the collection switching four-way valve 285. The second recovery pump inlet line 666 is connected to the first recovery pump inlet line 658 via a first recovery three-way valve 282. The first collection pump inlet pipe 658 is connected to the collection pump outlet pipe 659 via the collection pump 236. The recovery pump outlet pipe 659 is connected to the upper portion of the tank 101.

  Alternatively, a first recovery pump inlet pipe 658 branched from the intermediate pipe 653 is connected to the intermediate pipe 653. The first collection pump inlet pipe 658 is connected to the collection pump outlet pipe 659 via the collection pump 236. The recovery pump outlet pipe 659 is connected to the upper portion of the tank 101.

[Connection between tank unit and heat pump unit]
Subsequently, connection between the tank unit 10A and the heat pump unit 30 will be described. The pipeline described here is an example of a pipeline of a tank system that connects the tank unit 10A and the heat pump unit 30. As described above with respect to the connection between the tank unit 10A, the liquid heat exchanger 272 and the bath heat exchanger 207A, the water supply pipe 151 connected to the lower portion of the tank 101 is connected to the first via the recovery switching four-way valve 285. It is connected to the water supply connection pipe 667. The first water supply connection pipe 667 is connected to the intermediate pipe 653 via the first inner pipe 652 of the third liquid heat exchanger 272. The first collection pump inlet pipe 658 is connected to the collection pump outlet pipe 659 via the collection pump 236.

  As represented by arrows A28 and A29 shown in FIG. 21, the recovery pump outlet pipe 659 is connected to the inlet pipe 356 of the second liquid heat exchanger 302 via the second recovery three-way valve 283. . The inlet pipe 356 of the second liquid heat exchanger 302 is connected to the outlet pipe 355 of the second liquid heat exchanger 302 via the inner pipe 353 of the second liquid heat exchanger 302. As represented by arrows A30 and A31 shown in FIG. 21, the outlet pipe 355 of the second liquid heat exchanger 302 is connected to the recovery pump outlet pipe 659 via the third recovery three-way valve 284. . The recovery pump outlet pipe 659 is connected to the upper portion of the tank 101.

  Next, the basic operation of the hot water supply and heating system 2A according to the present embodiment will be described with reference to the drawings.

[Water supply preheating operation]
FIG. 22 is a diagram for explaining the water supply preheating operation of the hot water supply and heating system according to the present embodiment.
As described above with reference to FIG. 3, the water supply preheating operation is an operation of heating the water stored inside the tank 101 by the heat generated by the heat pump unit 30. Filled portions shown in FIG. 22 represent pipelines through which water flows in the feed water preheating operation. When control device 70 controls the feed water preheating operation, recovery pump 236 and heating pump 275 are driven. Further, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the feed water preheating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the feed water preheating operation, the second liquid heat exchanger 302 functions as a cooler.

  As indicated by an arrow A33 shown in FIG. 22, when the heating pump 275 is driven, water inside the cistern 237 flows through the cistern outlet pipe 629 and is pumped by the heating pump 275 to the heating pump outlet pipe 662. The water flowing through the heating pump outlet pipe 662 is led to the inner pipe 352 of the first liquid heat exchanger 301 via the inlet pipe 615 of the first liquid heat exchanger 301. The water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of the water flowing out of the first liquid heat exchanger 301 is, for example, about 45.degree.

  The water flowing out of the first liquid heat exchanger 301 flows through the outlet pipe 616 of the first liquid heat exchanger 301 and is led to the second inner pipe 654 of the third liquid heat exchanger 272. The water flowing through the second inner pipe 654 of the third liquid heat exchanger 272 is discharged from the outlet pipe 664 of the third liquid heat exchanger 272, the first low-temperature capacity pipe 632, and the second low-temperature capacity pipe 633. And is led to the cistern 237.

  On the other hand, when the recovery pump 236 is driven as shown by arrow A34 shown in FIG. 22, the water inside the tank 101 flows through the water supply pipe 151 connected to the lower part of the tank 101, and the recovery switching four-way valve 285 and the water supply It is led to the connection pipe 651 of the third liquid heat exchanger 272 via the switching three-way valve 277. The water flowing through the connection pipe 651 of the third liquid heat exchanger 272 is led to the first inner pipe 652 of the third liquid heat exchanger 272.

  At this time, the temperature of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is, for example, about 15 ° C. or so. The water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is heated by the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272. The temperature of water heated in the third liquid heat exchanger 272 and flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is about 45 ° C., for example. On the other hand, the temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is, for example, about 15 ° C.

  The water flowing through the intermediate pipe 653 flows through the first recovery pump inlet pipe 658 and is delivered to the recovery pump outlet pipe 659 by the recovery pump 236. Water flowing through the recovery pump outlet pipe 659 is led to the inside of the tank 101. Thereby, a high temperature (for example, about 45 ° C.) water layer is formed in the upper part in the tank 101. In the lower part of the tank 101, a layer of water at a low temperature (for example, about 15 ° C.) is formed.

[Hot water supply operation / heat storage utilization hot water supply operation]
FIG. 23 is a diagram for explaining the hot water supply operation and the heat storage utilization hot water supply operation of the hot water supply and heating system according to the present embodiment.
As described above with reference to FIG. 4, the hot water supply operation is an operation of heating water supplied from a water supply source (for example, water supply) and supplying the water to the hot water supply tap. The heat storage utilizing hot water supply operation is an operation of supplying the water stored in the tank 101 and heated in the tank 101 to the hot water supply tap. Filled portions shown in FIG. 23 represent pipelines through which water flows in the hot water supplying operation and the heat storage utilizing hot water supplying operation.

  When the hot water tap is opened, the controller 70 opens at least one of the water control valve 114 and the hot water control valve 117. Then, water flows through the mixed water introduction pipe 154 by the pressure of the water supplied from the water supply source, and is supplied to the gas boiler 20A. The temperature of the water supplied from the water source is, for example, about 15 ° C.

  When the temperature of the water supplied to the gas boiling unit 20A (the detected temperature of the mixing thermistor 121) is lower than the hot water supply set temperature, the control device 70 controls the hot water supply operation to operate the combustion device 201. That is, the water flowing inside the combustion apparatus 201 is heated by at least one of the first burner 203 and the second burner 204. The temperature of the water heated in the hot water supply latent heat exchanger 205 is, for example, about 30 ° C. or so. The temperature of the water heated in the hot water supply heat exchanger 206A is, for example, about 70.degree.

  The heated water (hot water) passes through the outlet pipe 607 and the hot water supply receiving pipe 661 of the hot water supply heat exchanger 206A, mixes with the water led to the hot water supply bypass pipe 611 by the bypass servo 222, and supplies hot water via the hot water amount servo 224 It is supplied to the stopper. The temperature of the water led to the hot water tap is, for example, about 42 ° C. The control device 70 controls the outputs of the first burner 203 and the second burner 204 so that the temperature of the water supplied to the hot water supply tap matches the hot water supply set temperature.

  If the temperature of the water stored in the tank 101 (the temperature detected by the in-tank thermistor 113) is higher than the hot water supply set temperature, the control device 70 executes control of the heat storage utilizing hot water supply operation, and the water control valve 114 and the hot water The opening degree of each control valve 117 is adjusted. At this time, the temperature of the water stored in the tank 101 is, for example, about 45.degree. C. and a maximum of about 60.degree.

  The water flowing through the water introducing pipe 152 and the water flowing through the hot water introducing pipe 153 join together as mixed water through the mixed water introducing pipe 154, and are supplied to the hot water supply tap through the combustion device 201. At this time, the combustion apparatus 201 does not perform the combustion operation. That is, the water flowing through the combustion apparatus 201 is not heated by the first burner 203 and the second burner 204. The temperature of the water flowing through the mixed water introduction pipe 154 and the water supplied to the hot water tap is, for example, about 42.degree. Thus, control device 70 controls the respective opening degrees of water control valve 114 and hot water control valve 117 so that the temperature of the water supplied to the hot water supply tap matches the hot water supply set temperature. The pipeline through which water flows in the heat storage utilizing hot-water supply operation is the same as the pipeline through which water flows in the hot-water supply operation.

[Drain drainage operation]
FIG. 24 and FIG. 25 are diagrams for explaining the drain discharge operation of the hot water supply and heating system according to the present embodiment.
As described above with reference to FIGS. 5 and 6, the drain discharging operation is an operation for discharging the drain stored in the drain tank 233 and cleaning the pipeline. Filled portions shown in FIG. 24 represent pipelines through which water flows in the operation of discharging the drain stored in the drain tank 233. Filled portions shown in FIG. 25 represent a pipeline through which water flows in the operation of flushing the pipeline.

  When the user presses an automatic button (not shown), the control device 70 executes control of the operation for draining the drain accumulated in the drain tank 233 (drain drain operation) and then executes control of the pouring operation. . This is as described above with reference to FIGS. 5 and 6.

  When the control device 70 executes control of draining operation, the bath pump 235 is driven. Then, as indicated by an arrow A9 shown in FIG. 24, the drain (water) stored in the drain tank 233 flows through the first drain tank outlet pipe 641 and the third drain switching three-way valve 252 It is led to the pouring pipe 645 of The drain flowing through the third pouring pipe 645 is led to the bath pump inlet pipe 626 via the solenoid valve 281.

  The drain flowing through the bath pump inlet pipe 626 is pumped by the bath pump 235 to the bath pump outlet pipe 614. Subsequently, the drain flowing through the bath pump outlet pipe 614 passes through the second inner pipe 657 of the bath heat exchanger 207A and is led to the first bath return pipe 619. The drain flowing through the first bath forward pipe 619 is drained through the first drain switching three-way valve 247.

  Subsequently, as shown in FIG. 25, the controller 70 executes control of the washing operation and opens the water control valve 114. Then, water flows through the water introduction pipe 152 and the mixed water introduction pipe 154 by the pressure of the water supplied from the water supply source, and is supplied to the gas boiler 20A. The water supplied to the gas heater 20A flows through the hot water supply latent heat exchanger 205 and the hot water supply heat exchanger 206A, and is led to the hot water supply pipe 661. The water flowing through the hot water supply incoming pipe 661 flows through the first pouring pipe 643, the second pouring pipe 644, and the third pouring pipe 645 through the hot water amount servo 224. The water flowing through the third pouring pipe 645 flows through the same pipe as the pipe described above for the drain discharging operation, and is drained through the first drain switching three-way valve 247.

[First filling operation / heat storage filling operation]
FIG. 26 is a view for explaining a first pouring operation and a heat storage pouring operation of the hot water supply and heating system according to the present embodiment.
The first pouring operation is an operation of heating water supplied from a water supply source (for example, water supply) and supplying the water to the bath 50. The heat storage pouring operation is an operation of supplying the water stored in the tank 101 and heated by the third liquid heat exchanger 272 to the bath 50. The filled portions shown in FIG. 26 represent pipelines through which water flows in the first filling operation and the heat storage filling operation.

  When the user presses the automatic button (not shown), the control device 70 executes the control of the first pouring operation or the heat accumulation pouring operation after executing the control of the drain discharging operation described above with reference to FIG. . In the first filling operation and the heat storage filling operation, the controller 70 opens at least one of the water control valve 114 and the hot water control valve 117. Then, water flows through the mixed water introduction pipe 154 by the pressure of the water supplied from the water supply source, and is supplied to the gas boiler 20A. The temperature of the water supplied from the water source is, for example, about 15 ° C.

  If the temperature of the water supplied to the gas heating unit 20A (the detected temperature of the mixing thermistor 121) is lower than the set temperature, the control device 70 executes the control of the first filling operation, and the combustion device Activate 201. The water (hot water) heated in the combustion apparatus 201 passes through the outlet pipe 607 of the hot water supply heat exchanger 206A and is led to the hot water amount servo 224. This is as described above with reference to FIG. The temperature of the water heated in the hot water supply latent heat exchanger 205 is, for example, about 30 ° C. or so. The temperature of the water heated in the hot water supply heat exchanger 206A is, for example, about 70.degree.

  The water led to the hot water amount servo 224 mixes with the water led to the hot water supply bypass pipe 611 by the bypass servo 222 and flows through the first pouring pipe 643, and the pouring electromagnetic valve 266 and the check valve 267, It is led to the second pouring pipe 644 via the check valve 268. The water led to the second pouring pipe 644 is led to the third pouring pipe 645 via the second drain switching three-way valve 252. The water flowing through the third pouring pipe 645 is guided to the bath pump inlet pipe 626, the bathtub bypass pipe 631, and the second bath return pipe 624 through the solenoid valve 281.

  Water flowing through bath pump inlet pipe 626 is pumped by bath pump 235 to bath pump outlet pipe 614. Subsequently, the water flowing through the bath pump outlet pipe 614 passes through the second inner pipe 657 of the bath heat exchanger 207A and is guided to the first bath forwarding pipe 619. The water flowing through the first bath transfer pipe 619 flows through the second bath transfer pipe 621 and is supplied to the bath 50 through a circulation fitting (not shown). On the other hand, the water flowing through the second bath return pipe 624 joins the water flowing through the bath bypass pipe 631 and flows through the first bath return pipe 623 and is supplied to the bath 50 via the circulation fitting (not shown). Be done. That is, in the first filling operation, the water (hot water) heated in the combustion device 201 is supplied to the bath 50 using both the hot water transfer pipes 619 and 621 and the hot water return pipes 623 and 624.

  The temperature of the water led to the bath 50 is, for example, about 42.degree. The control device 70 controls the output of the first burner 203 and the second burner 204 so that the temperature of the water supplied to the bath 50 matches the water filling set temperature.

  If the temperature of the water stored in the tank 101 (the temperature detected by the in-tank thermistor 113) is higher than the set temperature, the control device 70 executes control of the stored heat filling operation, and the water control valve 114 and Each opening degree of the hot water control valve 117 is adjusted. At this time, the temperature of the water stored in the tank 101 is, for example, about 40 ° C. to 60 ° C.

  The water flowing through the water introduction pipe 152 and the water flowing through the hot water introduction pipe 153 join together as mixed water through the mixed water introduction pipe 154, and are led to the hot water amount servo 224 through the combustion device 201. At this time, the combustion apparatus 201 does not perform the combustion operation. That is, the water flowing through the combustion apparatus 201 is not heated by the first burner 203 and the second burner 204. The controller 70 controls the opening degree of each of the water control valve 114 and the hot water control valve 117 so that the temperature of the water supplied to the bathtub 50 matches the water filling set temperature. The pipeline through which the water flows in the heat storage pouring operation is the same as the pipeline through which the water flows in the first pouring operation. In the heat storage pouring operation, the water flowing through the mixed water introduction pipe 154 may not be led to the hot water supply bypass pipe 611. In this case, for example, water at about 40 ° C. to 60 ° C. disappears from the inside of the tank 101, and for example, water at about 15 ° C. can be suppressed from being led to the bath 50 without being heated in the combustion device 201. This can suppress the execution of an unintended reheating operation.

  Then, the control device 70 temporarily suspends the first pouring operation and the heat accumulation pouring operation when the water level inside the bathtub 50 is higher than the circulation fitting (not shown), and confirms the water level inside the bathtub 50 Do. Subsequently, the control device 70 executes control of the first pouring operation or the heat storage pouring operation until the water level inside the bathtub 50 reaches the set water level.

[The second pouring operation / heat storage pouring operation]
FIG. 27 is a view for explaining the second pouring operation and the heat storage pouring operation of the hot water supply and heating system according to the present embodiment.
The second water filling operation described with reference to FIG. 27 is an operation of heating water supplied from a water supply source (for example, water service) using the gas water heater 20A and the heat pump unit 30, and supplying the water to the bathtub 50. It is. The heat storage pouring operation is an operation of supplying the water stored in the tank 101 and heated by the third liquid heat exchanger 272 to the bath 50. As described above with reference to FIG. 8, for example, when hot water is not stored in the tank 101 and the hot water setting temperature is 40 ° C. or lower in summer or the like, high efficiency hot water filling is achieved by using the heat pump unit 30. The operation can be realized. The filled portions shown in FIG. 27 represent pipelines through which water flows in the second filling operation and the heat storage filling operation.

  When the user sets the water filling set temperature to 40 ° C. or less and presses an automatic button (not shown), the control device 70 controls the second water filling operation using the gas water boiling section 20A and the heat pump section 30. Run. Then, the recovery pump 236 and the heating pump 275 are driven. Also, the controller 70 opens the hot water control valve 117. Furthermore, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the second pouring operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the second pouring operation, the second liquid heat exchanger 302 functions as a cooler.

  The amount (sequence) of water used during the pouring operation differs between when the bathtub 50 is empty and when there is water in the bathtub 50. Therefore, first, the control device 70 operates the bath pump 235, and determines the state of the bathtub 50 by confirming on / off of the bath water flow switch 253.

  When there is water in the bathtub 50 (when the bath flow switch 253 is on), the control device 70 first performs the second process described later with reference to FIG. 29 until the temperature of the water in the bathtub 50 reaches the set temperature of the remote control. Execute reheating by reheating operation. When the temperature of the water in the bathtub 50 reaches the set temperature, the control device 70 stops the bath pump 235, stops the burning operation of the burning device 201, and detects the current water level in the bathtub 50 by the water level sensor 255, The water filling in the bathtub 50 is performed until the water level in the remote control reaches the set water level by the second water filling operation / storage water filling operation described with reference to FIG.

  The heat pump unit 30 does not have the ability to perform heat exchange unless a predetermined time has elapsed from the start of operation. That is, while the operation of the hot water supply and heating system 2A shifts from the second reheating operation described later with reference to FIG. 29 to the second pouring operation and heat accumulation pouring operation described with reference to FIG. When the operation stop / operation start control is executed, the efficiency of the heat pump unit 30 is significantly reduced. Therefore, in the process of shifting the operation of the hot water supply heating system 2A from the second reheating operation described later with reference to FIG. 29 to the second pouring operation and heat storage pouring operation described with reference to FIG. Control of continuous operation is performed.

  When the water filling operation is performed until the water level in the bathtub 50 reaches the set water level by the second water filling operation and heat storage water filling operation described with reference to FIG. Driving 235 is performed to check whether the temperature of the error in the bathtub 50 matches the set temperature of the remote control. In summer, the temperature of the water in the bathtub 50 often matches the set temperature of the remote control. In this case, the hot water supply and heating system 2A shifts to the operation of “heat retention” and “water retention”. On the other hand, in winter, the temperature of the water in the bathtub 50 may not match the set temperature of the remote control. In that case, the control device 70 executes the reheating by the first repelling operation described later with reference to FIG. 28 until the temperature of the water in the bathtub 50 reaches the set temperature. The execution time of the repelling operation at this time is, for example, about one minute.

  When the operation of the hot water supply and heating system 2A shifts from the second pouring operation described with reference to FIG. 27 to a first repelling operation described later with reference to FIG. 28, the control device 70 stops the heat pump unit 30. The control device 70 back-calculates the pouring time until the water level in the bathtub 50 reaches the set water level, and transmits a signal to stop the heating operation of the heat pump unit 30 a predetermined time ago. Thereby, the control device 70 moves the heat of the first liquid heat exchanger 301 and executes control of the operation of cooling the heat medium inside the first liquid heat exchanger 301. Not only the efficiency of the heat pump unit 30 is enhanced because the heat of the first liquid heat exchanger 301 can be transferred, but also the amount of the heat medium in the liquid state is maintained by continuing the cooling operation in the first liquid heat exchanger 301. Become more. On the other hand, in the gas heat exchanger 303, the amount of heat medium in the liquid state is reduced. Thereby, at the time of the next driving | operation start of the heat pump part 30, the problem that time will be required for driving | operation capability to recover | restore can be solved.

  The predetermined time described above is determined by the efficiency of the heat pump unit 30 and the recovery of the operating capacity of the heat pump unit 30. Therefore, the heat pump unit 30 is stopped (compressor 304 is stopped) in the second half of the second pouring operation and heat storage pouring operation described with reference to FIG. 27, and the operation of the hot water supply heating system 2A is illustrated from this state It transfers to the 1st repelling operation mentioned later about 28, or transfers to the operation of "warm" and "water retention" without moving.

  On the other hand, when there is no water in the bathtub 50 (when the bath flow switch 253 is off), the control device 70 first refers to FIG. 27 until the water level in the bathtub 50 reaches the set water level of the remote control. The water filling is performed by the second water filling operation and heat storage water filling operation. When the water is filled until the water level in the bathtub 50 reaches the set water level by the second filling operation and heat storage filling operation described with reference to FIG. 27, the control device 70 operates the bath pump 235 Check whether the temperature of the water in the bathtub 50 matches the set temperature of the remote control. Even in the summer, the temperature of the water in the bathtub 50 is less likely to coincide with the set temperature of the remote control, and for example, a reheating operation of about one minute is required. In winter, the execution time of the repelling operation is, for example, about two minutes. In any case, the operation of the hot water supply and heating system 2A shifts to the "heat retention" and "water retention" operation after the end of the reheating operation. When the operation of the hot water supply and heating system 2A shifts from the second pouring operation and heat storage pouring operation to be described with reference to FIG. 27 to a first repelling operation to be described later with reference to FIG. Stop 30 The control device 70 back-calculates the time until the end of the reheating operation, and transmits a signal to stop the heating operation of the heat pump unit 30 a predetermined time ago. As a result, the efficiency of the heat pump unit 30 is enhanced, and the operation recovery capability of the heat pump unit 30 at the next start of operation is enhanced.

  By the way, when there is water in the bathtub 50, the operation of the hot water supply and heating system 2A is from the second reheating operation described later with reference to FIG. 29 to the second pouring operation and heat storage operation described with reference to FIG. During the transition, the heat pump unit 30 performs continuous operation, and the control device 70 detects the current water level in the bathtub 50 using the water level sensor 255 during the transition. However, the vibration of the compressor 304 (the vibration of the heat medium) and the vibration of the heating pump 275 pass through the first liquid heat exchanger 301 or the third liquid heat exchanger 272 and the first liquid heat exchanger 301. There may be a case where the water level sensor 255 is transmitted. Then, the vibration of the compressor 304 (the vibration of the heat medium) and the vibration of the heating pump 275 may adversely affect the accurate water level detection. As the first liquid heat exchanger 301 and the third liquid heat exchanger 272, a water-water heat exchanger formed by laminating thin plates is often used. In such a case, the thin plate itself vibrates, which greatly affects the water level sensor 255.

  On the other hand, in the hot water supply and heating system 2A according to the present embodiment, the control device 70 stops the bath pump 235 and stops the heating pump 275, thereby stopping the second liquid heat exchanger 272. The direct vibration of the water flowing through the pipe 654 is reduced, and the indirect vibration of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is reduced. And control device 70 sets defrost valve 308 to an open state temporarily. As a result, the pressure on the outlet side of the compressor 304 is reduced, and the indirect vibration of the water itself flowing through the inner pipe 352 of the first liquid heat exchanger 301 is reduced to thereby suppress the third liquid heat exchanger 272. Indirect vibration of water flowing through the inner pipe 652 of 1 is reduced. As a result, by reducing the vibration that affects the water level sensor 255, the accurate water level can be detected.

  That is, when detecting the water level inside the bathtub 50 by the water level sensor 255, the control device 70 stops the combustion operation of the combustion device 201 while continuing the heating operation of the heat pump unit 30. Control is performed to stop the drive and open the defrost valve 308 of the heat pump unit 30. Alternatively, the control device 70 also uses stopping the heating pump 275. Thereby, even when the operation of the hot water supply heating system 2A is switched from the second reheating operation shown in FIG. 29 to the second pouring operation / storage water pouring operation shown in FIG. 27, the heating operation of the heat pump unit 30 Will continue. Therefore, it can suppress that the efficiency of the heat pump part 30 falls. In addition, the control device 70 stops the combustion operation of the combustion device 201, stops the driving of the bath pump 235, stops the heating pump 275, and opens the defrost valve 308 of the heat pump unit 30, You can suppress the movement of water. Thus, the water level sensor 255 can detect the water level inside the bathtub 50 with high accuracy.

  When the operation of the hot water supply heating system 2A is switched from the reheating operation to the pouring operation, the operation of the hot water supply heating system 2A is not limited to the execution of the vibration reduction process that affects the water level sensor 255. A process may be performed to prevent the indirect vibration affecting the water level sensor 255, even when switching from the pouring operation to the pouring operation or otherwise.

  As indicated by an arrow A33 shown in FIG. 27, when the heating pump 275 is driven, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is sent out to the heating pump outlet pipe 662 by the heating pump 275. The water flowing through the heating pump outlet pipe 662 passes through the first liquid heat exchanger 301 and the third liquid heat exchanger 272 and is led to the cistern 237. This is as described above with reference to FIG. At this time, the temperature of water flowing out of the first liquid heat exchanger 301 and flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is, for example, about 45 ° C.

  On the other hand, when the recovery pump 236 is driven and the hot water control valve 117 is opened as indicated by an arrow A34 shown in FIG. 27, water flows through the water supply pipe 151 by the pressure of the water supplied from the water supply source. Pass the lower part of 101. The water passing through the lower part of the tank 101 continues to flow through the water supply pipe 151 and is led to the connection pipe 651 of the third liquid heat exchanger 272 via the recovery switching four-way valve 285 and the water supply switching three-way valve 277. The water flowing through the connection pipe 651 of the third liquid heat exchanger 272 flows through the first inner pipe 652 of the third liquid heat exchanger 272.

  At this time, the temperature of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is, for example, about 15 ° C. or so. The water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is heated by the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272. The temperature of the water heated in the third liquid heat exchanger 272 and flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is about 30 ° C., for example. On the other hand, the temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is, for example, about 15 ° C.

  The water flowing through the intermediate pipe 653 flows through the first recovery pump inlet pipe 658 and is delivered to the recovery pump outlet pipe 659 by the recovery pump 236. Water flowing through the recovery pump outlet pipe 659 is led to the inside of the tank 101. Thereby, a water layer of, for example, about 30 ° C. is formed in the upper part in the tank 101.

  Since the hot water control valve 117 is open as indicated by an arrow A35 shown in FIG. 27, water in the layer formed at the upper part in the tank 101 (for example, water at about 30 ° C.) It flows and is supplied to the gas boiler 20A. The water supplied to the gas boiler 20A flows inside the combustion apparatus 201 and is heated by at least one of the first burner 203 and the second burner 204. The temperature of the water heated in the hot water supply latent heat exchanger 205 is, for example, about 30 ° C. or so. The temperature of the water heated in the hot water supply heat exchanger 206A is, for example, about 60.degree.

  Subsequently, the water (hot water) heated in the combustion device 201 flows through the outlet pipe 607 of the hot water supply heat exchanger 206A, and is supplied to the bathtub 50 through the same pipe as the pipe described above with reference to FIG. The temperature of the water led to the bath 50 is, for example, about 45.degree.

  Alternatively, in the second pouring operation described with reference to FIG. 27, the water stored in the tank 101 and heated by the third liquid heat exchanger 272 is heated by the combustion apparatus 201. The bath 50 may be supplied without being That is, the control device 70 may execute control of the heat storage pouring operation. At this time, a water layer of about 45 ° C., for example, is formed in the upper part in the tank 101.

  That is, when the user sets the water filling set temperature to 40 ° C. or less and presses an automatic button (not shown), the control device 70 drives the recovery pump 236 and the heating pump 275. At this time, the rotational speed of the recovery pump 236 is lower than the rotational speed of the recovery pump 236 in the second pouring operation described above. Further, the flow of water when the heating pump 275 is driven is as described above.

  As described above, when the recovery pump 236 is driven and the hot water control valve 117 is opened, for example, water of about 15 ° C. flows through the first inner pipe 652 of the third liquid heat exchanger 272. The water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is heated by the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272. The temperature of water heated in the third liquid heat exchanger 272 and flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is about 45 ° C., for example.

  Water flowing through the intermediate pipe 653 flows through the first recovery pump inlet pipe 658 and the recovery pump outlet pipe 659 and is led to the inside of the tank 101. The temperature of the water introduced into the tank 101 is, for example, about 45.degree. The water of the layer formed in the upper part in the tank 101 (for example, water at about 45 ° C.) flows through the above-described pipeline and is supplied to the bath 50 without being heated by the combustion device 201. In the heat storage pouring operation, the water flowing through the mixed water introduction pipe 154 may not be led to the hot water supply bypass pipe 611. In this case, for example, water at about 45 ° C. disappears from the inside of the tank 101, and for example, water at about 15 ° C. can be suppressed from being led to the bath 50 without being heated in the combustion device 201. This can suppress the execution of an unintended reheating operation.

[First reaping operation]
FIG. 28 is a diagram for explaining a first reheating operation of the hot water supply and heating system according to the present embodiment.
The first repelling operation is an operation of circulating and heating the water inside the bath 50 and returning the heated water to the bath 50. The filled portions shown in FIG. 28 represent pipelines through which water flows in the first repelling operation.

  When the user presses the automatic button (not shown) and the first pouring operation described above with reference to FIG. 26 and the second pouring operation described above with respect to FIG. The water level is confirmed, and the control of the first reheating operation is performed so that the temperature of the water inside the bathtub 50 matches the set temperature. Alternatively, when the user presses the repelling button (not shown), the control device 70 performs control of the first repelling operation such that the temperature of the water inside the bathtub 50 matches the set temperature.

  When the control device 70 executes the control of the first repelling operation, the bath pump 235 and the recovery pump 236 are driven. Also, the controller 70 opens the hot water control valve 117.

  When the recovery pump 236 is driven as indicated by an arrow A36 shown in FIG. 28, the water flowing through the first recovery pump inlet pipe 658 is pumped by the recovery pump 236 to the recovery pump outlet pipe 659. Water flowing through the recovery pump outlet pipe 659 is led to the inside of the tank 101. The temperature of the water introduced into the tank 101 is, for example, about 45.degree.

  Since the hot water control valve 117 is open as indicated by an arrow A35 shown in FIG. 28, water in the layer formed at the upper part in the tank 101 (for example, water at about 45 ° C.) It flows and is supplied to the gas boiler 20A. The water supplied to the gas boiler 20A flows inside the combustion apparatus 201 and is heated by at least one of the first burner 203 and the second burner 204. The temperature of the water heated in the hot water supply latent heat exchanger 205 is, for example, about 45.degree. The temperature of the water heated in the hot water supply heat exchanger 206A is, for example, about 80.degree.

  Subsequently, the water (hot water) heated in the combustion device 201 flows through the outlet pipe 607 of the hot water supply heat exchanger 206A, and is branched to the connection pipe 655 of the bath heat exchanger 207A branched from the outlet pipe 607 of the hot water supply heat exchanger 206A. Led. As indicated by an arrow A38 shown in FIG. 28, the water flowing through the connection pipe 655 of the bath heat exchanger 207A is led to the first inner pipe 656 of the bath heat exchanger 207A. The temperature of the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is, for example, about 80.degree. The water flowing through the first inner pipe 656 of the bath heat exchanger 207A flows through the intermediate pipe 653 and is led to the first recovery pump inlet pipe 658.

  On the other hand, as shown by arrow A37 shown in FIG. 28, when the bath pump 235 is driven, the water in the bath 50 contains the first bath return pipe 623, the second bath return pipe 624, and the bath pump inlet. It flows through pipe 626 and is pumped by bath pump 235 to bath pump outlet pipe 614. The water flowing through the bath pump outlet pipe 614 is led to the second inner pipe 657 of the bath heat exchanger 207A.

  At this time, the temperature of the water flowing through the second inner pipe 657 of the bath heat exchanger 207A is, for example, about 30 ° C. The water flowing through the second inner pipe 657 of the bath heat exchanger 207A is heated by the water flowing through the first inner pipe 656 of the bath heat exchanger 207A. The temperature of the water heated in the bath heat exchanger 207A and flowing out of the bath heat exchanger 207A and flowing through the first bath passing pipe 619 is, for example, about 60.degree. On the other hand, the temperature of water flowing out of the bath heat exchanger 207A and flowing through the intermediate pipe 653 is about 45 ° C., for example. The water flowing through the first bath transfer pipe 619 flows through the second bath transfer pipe 621 and is supplied to the bath 50 through a circulation fitting (not shown).

[Second repelling action]
FIG. 29 is a diagram for explaining a second reheating operation of the hot water supply and heating system according to the present embodiment.
In the first repelling operation described above with reference to FIG. 28, the water introduced from the bath 50 is heated using the gas boiling portion 20A, while in the second repelling operation described with reference to FIG. The water introduced from the bath 50 is heated using the water heating section 20A and the heat pump section 30. The filled portions shown in FIG. 29 represent pipelines through which water flows in the second repelling operation.

  For example, when the user presses the repelling button (not shown) with water remaining inside the bathtub 50 and the water temperature is relatively low, the controller 70 controls the water inside the bathtub 50 to The control of the second repelling operation is performed such that the temperature of H.sub.2 matches the set temperature.

  When the control device 70 executes the control of the second repelling operation, the bath pump 235 and the recovery pump 236 are driven. Also, the controller 70 opens the hot water control valve 117. Furthermore, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the second reheating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the second reheating operation, the second liquid heat exchanger 302 functions as a cooler.

  When the recovery pump 236 is driven as shown by an arrow A36 shown in FIG. 29, water is pumped by the recovery pump 236 to the recovery pump outlet pipe 659. Then, the water flowing through the recovery pump outlet pipe 659 is led to the inside of the tank 101, led to the inside of the combustion device 201 and heated, and flows through the first inner pipe 656 of the bath heat exchanger 207A. This is the same as the flow of water in the first repelling operation described above with reference to FIG. The temperature of the water heated in the hot water supply heat exchanger 206A is, for example, about 80.degree. The temperature of the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is, for example, about 80 ° C.

  At this time, the water flowing through the second inner pipe 657 of the bath heat exchanger 207A is the water flowing through the first inner pipe 656 of the bath heat exchanger 207A, similarly to the first repelling operation described above with reference to FIG. It is heated by The temperature of the water heated in the bath heat exchanger 207A and flowing out of the bath heat exchanger 207A and flowing through the first bath passing pipe 619 is, for example, about 60.degree. On the other hand, the temperature of water flowing out of the bath heat exchanger 207A and flowing through the intermediate pipe 653 is about 45 ° C., for example. The water flowing through the first bath transfer pipe 619 flows through the second bath transfer pipe 621 and is supplied to the bath 50 through a circulation fitting (not shown).

  The water flowing out of the first inner pipe 656 of the bath heat exchanger 207A flows through the intermediate pipe 653 and is led to the first inner pipe 652 of the third liquid heat exchanger 272. At this time, the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is heated by the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272.

  That is, as shown by arrow A33 shown in FIG. 29, when the heating pump 275 is driven, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is sent out to the heating pump outlet pipe 662 by the heating pump 275. The water flowing through the heating pump outlet pipe 662 passes through the first liquid heat exchanger 301 and the third liquid heat exchanger 272 and is led to the cistern 237. This is as described above with reference to FIG. At this time, the temperature of water flowing out of the first liquid heat exchanger 301 and flowing through the second inner pipe 654 of the third liquid heat exchanger 272 via the outlet pipe 616 of the first liquid heat exchanger 301 is For example, about 60.degree. On the other hand, the temperature of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is, for example, about 45 ° C. Thus, the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is heated by the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272.

  The temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the connection pipe 651 of the third liquid heat exchanger 272 is, for example, about 60 ° C. or so. On the other hand, the temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is about 45 ° C., for example.

  As indicated by an arrow A39 shown in FIG. 29, the water flowing through the connection pipe 651 of the third liquid heat exchanger 272 is led to the first water supply connection pipe 667 via the water supply switching three-way valve 277. As shown by arrows A 26 and A 27 shown in FIG. 29, the water flowing through the first water supply connection pipe 667 is led to the second collection pump inlet pipe 666 via the collection switching four-way valve 285. As indicated by arrow A 36 shown in FIG. 29, the water flowing through the second recovery pump inlet pipe 666 is led to the first recovery pump inlet pipe 658 through the first recovery three-way valve 282, and is recovered by the recovery pump 236. It is sent out to the recovery pump outlet pipe 659. Water flowing through the recovery pump outlet pipe 659 is led to the inside of the tank 101. The temperature of the water introduced into the tank 101 is, for example, about 60.degree.

[Third repelling action]
FIG. 30 is a view for explaining the third reheating operation of the hot water supply and heating system according to the present embodiment.
In the third reheating operation described with reference to FIG. 30, the heat introduced from the bathtub 50 is heated using the heat pump unit 30. The filled portions shown in FIG. 30 represent pipelines through which water flows in the third reheating operation.

  When the user presses the automatic button (not shown) and the first pouring operation described above with reference to FIG. 26 and the second pouring operation described above with respect to FIG. Check the water temperature about every 30 minutes. If the difference between the temperature of the water inside the bathtub 50 and the set temperature is 0.5 ° C. or more, the control device 70 sets the temperature of the water inside the bathtub 50 to the same as the set temperature. Execute control of reheating operation of 3. The third repelling operation described with reference to FIG. 30 is a so-called heat retention operation during automatic operation.

  For example, when the control device 70 detects that the user has entered the bathtub 50 based on the detected water level of the water level sensor 255, the control device 70 starts the operation of the heat pump unit 30 and determines the degree of temperature decrease of water inside the bathtub 50. Check. Then, for example, when the degree of temperature decrease is small as in the summer season, the control device 70 executes control of the third repelling operation described with reference to FIG. On the other hand, when the degree of temperature decrease is large as in winter, for example, the control device 70 executes control of the second repelling operation described above with reference to FIG.

  When the control device 70 executes the third repelling operation, the bath pump 235, the recovery pump 236, and the heating pump 275 are driven. Further, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the third reheating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the third reheating operation, the second liquid heat exchanger 302 functions as a cooler.

  As indicated by an arrow A33 shown in FIG. 30, when the heating pump 275 is driven, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is sent out to the heating pump outlet pipe 662 by the heating pump 275. The water flowing through the heating pump outlet pipe 662 passes through the first liquid heat exchanger 301 and the third liquid heat exchanger 272 and is led to the cistern 237. This is as described above with reference to FIG. At this time, the temperature of water flowing out of the first liquid heat exchanger 301 and flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is, for example, about 45 ° C.

  When the recovery pump 236 is driven as shown by an arrow A34 shown in FIG. 30, the water inside the tank 101 flows through the water supply pipe 151 connected to the lower portion of the tank 101, and the recovery switching four-way valve 285 and the water supply switching three-way valve It is led to the connection pipe 651 of the third liquid heat exchanger 272 via 277. As indicated by arrow A40 in FIG. 30, the water flowing through the connection pipe 651 of the third liquid heat exchanger 272 is led to the first inner pipe 652 of the third liquid heat exchanger 272.

  At this time, the temperature of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is, for example, about 15 ° C. or so. The water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is heated by the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272. The temperature of water heated in the third liquid heat exchanger 272 and flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is about 45 ° C., for example. On the other hand, the temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is, for example, about 15 ° C.

  The water flowing through the intermediate pipe 653 is led to the first inner pipe 656 of the bath heat exchanger 207A. At this time, the water flowing through the second inner pipe 657 of the bath heat exchanger 207A is heated by the water flowing through the first inner pipe 656 of the bath heat exchanger 207A.

  That is, as shown by an arrow A37 shown in FIG. 30, when the bath pump 235 is driven, the water in the bath 50 is supplied with the first bath return pipe 623, the second bath return pipe 624, and the bath pump inlet pipe. It flows through 626 and is pumped by the bath pump 235 to the bath pump outlet pipe 614. The water flowing through the bath pump outlet pipe 614 is led to the second inner pipe 657 of the bath heat exchanger 207A. At this time, the temperature of the water flowing through the second inner pipe 657 of the bath heat exchanger 207A is, for example, about 30 ° C. On the other hand, the temperature of the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is, for example, about 45 ° C. Thus, the water flowing through the second inner pipe 657 of the bath heat exchanger 207A is heated by the water flowing through the first inner pipe 656 of the bath heat exchanger 207A.

  The temperature of the water heated in the bath heat exchanger 207A and flowing out of the bath heat exchanger 207A and flowing through the first bath passing pipe 619 is, for example, about 45 ° C. On the other hand, the temperature of water flowing out of the bath heat exchanger 207A and flowing through the connection pipe 655 of the bath heat exchanger 207A is, for example, about 30 ° C. The water flowing through the first bath transfer pipe 619 flows through the second bath transfer pipe 621 and is supplied to the bath 50 through a circulation fitting (not shown).

  As indicated by an arrow A41 shown in FIG. 30, the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is led to the connection pipe 655 of the bath heat exchanger 207A. As indicated by arrows A26 and A27 shown in FIG. 30, the water flowing through the connection pipe 655 of the bath heat exchanger 207A is led to the second collection pump inlet pipe 666 via the collection switching four-way valve 285. As indicated by arrow A 36 shown in FIG. 30, the water flowing through the second recovery pump inlet pipe 666 is led to the first recovery pump inlet pipe 658 through the first recovery three-way valve 282, and is recovered by the recovery pump 236. It is sent out to the recovery pump outlet pipe 659. Water flowing to the collection pump outlet pipe 659 is directed to the interior of the tank 101. The temperature of the water introduced into the tank 101 is, for example, about 30 ° C.

[Bath water heat heat pump section recovery operation]
31 and 32 are diagrams for explaining the hot water heat heat pump recovery operation of the hot water supply and heating system according to the present embodiment.
The bath water heat heat pump recovery operation is an operation of circulating the hot water remaining in the bath 50 and recovering the heat of the hot water with the water stored in the tank 101 via the heat pump 30. Filled portions shown in FIG. 31 represent pipelines through which water flows in the bath water heat heat pump recovery operation. Filled portions shown in FIG. 32 represent pipelines through which water flows when the hot water supply operation is interrupted in the middle of the bath water heat heat pump recovery operation.

  If the hot water remains inside the bathtub 50 when the automatic operation is finished, the control device 70 executes control of the bath water heat heat pump recovery operation. For example, when the user presses the automatic button (not shown) to stop the automatic operation manually, or when the user holds the hot-warming operation as an example of when the hot water remains inside the bathtub 50 when the automatic operation is finished. For example, the automatic operation may be automatically stopped after a lapse of time.

  When the control device 70 executes the bath water heat heat pump recovery operation, the bath pump 235, the recovery pump 236, and the heating pump 275 are driven. Further, the compressor 304 of the heat pump unit 30 supplies the heat medium to the second liquid heat exchanger 302 via the four-way switching valve 307. Therefore, the first liquid heat exchanger 301 functions as a cooler in the bath and heat pump recovery operation. On the other hand, the second liquid heat exchanger 302 functions as a heater in the bath water heat heat pump recovery operation.

  As indicated by an arrow A33 shown in FIG. 31, when the heating pump 275 is driven, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is sent out to the heating pump outlet pipe 662 by the heating pump 275. The water flowing through the heating pump outlet pipe 662 passes through the first liquid heat exchanger 301 and the third liquid heat exchanger 272 and is led to the cistern 237. This is as described above with reference to FIG. At this time, the temperature of water flowing out of the first liquid heat exchanger 301 and flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is, for example, about 15 ° C. or so.

  As indicated by arrows A28 and A29 shown in FIG. 31, when the recovery pump 236 is driven, the water pumped from the recovery pump 236 flows through the inlet pipe 356 of the second liquid heat exchanger 302 and the second liquid It is led to the heat exchanger 302. Since the second liquid heat exchanger 302 functions as a heater in the bath water heat heat pump recovery operation, the water flowing through the inner pipe 353 of the second liquid heat exchanger 302 is the second liquid heat exchanger 302. It heats by the heat carrier which flows through the heat carrier circulation path 351 in the inside of. The temperature of water flowing out of the second liquid heat exchanger 302 and flowing through the outlet pipe 355 of the second liquid heat exchanger 302 is, for example, about 60 ° C. or so.

  As indicated by arrows A31 and A43 shown in FIG. 31, the water flowing through the outlet pipe 355 of the second liquid heat exchanger 302 flows through the recovery pump outlet pipe 659 through the third recovery three-way valve 284 and the tank It is led to the inside of 101. The temperature of the water introduced into the tank 101 is, for example, about 60.degree. Since the water control valve 114 is open, the inside of the tank 101 flows through the water supply pipe 151 connected to the lower part of the tank 101, and is supplied to the gas boiler 20A via the mixed water introduction pipe 154.

  The water supplied to the gas heater 20A passes through the combustion device 201 and is led to the outlet pipe 607 of the hot water supply heat exchanger 206A. At this time, the combustion apparatus 201 does not perform the combustion operation. That is, the water flowing through the combustion apparatus 201 is not heated by the first burner 203 and the second burner 204. The water flowing through the outlet pipe 607 of the hot water supply heat exchanger 206A is led to the connection pipe 651 of the third liquid heat exchanger 272 via the water supply switching three-way valve 277. As indicated by arrow A40 in FIG. 31, the water flowing through the connection pipe 651 of the third liquid heat exchanger 272 is led to the first inner pipe 652 of the third liquid heat exchanger 272.

  At this time, the temperature of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is, for example, about 30 ° C. or so. The water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is cooled by the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272. The temperature of the water cooled in the third liquid heat exchanger 272 and flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is about 15 ° C., for example. On the other hand, the temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is, for example, about 30 ° C. or so.

  The water flowing through the intermediate pipe 653 is led to the first inner pipe 656 of the bath heat exchanger 207A. At this time, the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is heated by the water flowing through the second inner pipe 657 of the bath heat exchanger 207A.

  That is, as shown by arrow A37 shown in FIG. 31, when the bath pump 235 is driven, the water in the bath 50 is supplied with the first bath return pipe 623, the second bath return pipe 624, and the bath pump inlet pipe. It flows through 626 and is pumped by the bath pump 235 to the bath pump outlet pipe 614. The water flowing through the bath pump outlet pipe 614 is led to the second inner pipe 657 of the bath heat exchanger 207A. At this time, the temperature of the water flowing through the second inner pipe 657 of the bath heat exchanger 207A is, for example, about 45 ° C. On the other hand, the temperature of the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is, for example, about 15 ° C. Thus, the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is heated by the water flowing through the second inner pipe 657 of the bath heat exchanger 207A.

  The temperature of water cooled in the bath heat exchanger 207A and flowing out of the bath heat exchanger 207A and flowing through the first bath passing pipe 619 is, for example, about 15 ° C. On the other hand, the temperature of water flowing out of the bath heat exchanger 207A and flowing through the connection pipe 655 of the bath heat exchanger 207A is, for example, about 45 ° C. The water flowing through the first bath transfer pipe 619 flows through the second bath transfer pipe 621 and is supplied to the bath 50 through a circulation fitting (not shown).

  As indicated by an arrow A41 shown in FIG. 31, the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is led to the connection pipe 655 of the bath heat exchanger 207A. As indicated by arrows A26 and A27 shown in FIG. 31, the water flowing through the connection pipe 655 of the bath heat exchanger 207A is led to the second collection pump inlet pipe 666 via the collection switching four-way valve 285. As indicated by an arrow A 28 shown in FIG. 31, the water flowing through the second recovery pump inlet pipe 666 is led to the first recovery pump inlet pipe 658 through the first recovery three-way valve 282, and is recovered by the recovery pump 236. It is delivered to the inlet pipe 356 of the second liquid heat exchanger 302. The temperature of the water flowing through the inlet pipe 356 of the second liquid heat exchanger 302 is, for example, about 45.degree.

  Thus, the heat of the hot water remaining in the bath 50 is recovered by the water stored in the tank 101 via the heat pump section 30 in the bath water heat heat pump section recovery operation.

  Here, the hot water supply operation may be interrupted and executed in the middle of the bath-to-water heat heat pump recovery operation described with reference to FIG. That is, the hot water supply plug may be opened in the middle of the bath water heat heat pump recovery operation described with reference to FIG. In this case, as shown in FIG. 32, the controller 70 executes control to open the hot water control valve 117 and close the water control valve 114. Further, the control device 70 operates the combustion device 201.

  When the hot water control valve 117 is opened and the water control valve 114 is closed as indicated by an arrow A35 shown in FIG. 32, the water (for example, water at about 60 ° C.) formed in the upper portion in the tank 101 is mixed The water flows through the water inlet pipe 154 and is supplied to the gas boiler 20A. The water supplied to the gas boiler 20A flows inside the combustion apparatus 201 and is heated by at least one of the first burner 203 and the second burner 204. The temperature of the water heated in the hot water supply latent heat exchanger 205 is, for example, about 60.degree. The temperature of the water heated in the hot water supply heat exchanger 206A is, for example, about 80.degree.

  Subsequently, the water (hot water) heated in the combustion apparatus 201 passes through the outlet pipe 607 and the hot water supply incoming pipe 661 of the hot water supply heat exchanger 206A, and is mixed with the water led to the hot water supply bypass pipe 611 by the bypass servo 222, It is supplied to the hot water supply tap via the hot water amount servo 224. The temperature of the water led to the hot water tap is, for example, about 42 ° C. The controller 70 controls the output of the first burner 203 and the second burner 204 so that the temperature of the water supplied to the hot water supply tap matches the hot water supply set temperature, and the opening degree of the hot water amount servo 224 Control.

  Note that in the hot water heating heat pump recovery operation of the hot water supply heating system 2A according to the present embodiment, for example, the heat medium flowing out of the second liquid heat exchanger 302 is not cooled by driving the fan 306 or the like. The heat of the hot water remaining at 50 can be efficiently recovered by the water stored in the tank 101 via the heat pump unit 30. That is, in the bath water heat heat pump recovery operation described with reference to FIG. 31, the water heated in the second liquid heat exchanger 302 flows through the recovery pump outlet pipe 659 as shown by arrow A43, and the tank 101 Led to the inside of the The water inside the tank 101 is not heated by the plate heat exchanger 103 (see, for example, FIG. 2) provided on the surface of the tank 101. Therefore, the convection generated in the water inside the tank 101 is not natural convection but forced convection. Therefore, for example, even if the heat medium flowing out of the second liquid heat exchanger 302 is not cooled by driving the fan 306 or the like, the heat of the hot water remaining in the bath 50 is recovered by the heat pump unit 30, Water can be stored inside the tank 101.

  For example, the frequency with which the user uses water at about 45 ° C. in the daytime is higher than in the nighttime. Therefore, in the daytime, the control device 70 recovers the heat of the hot water remaining in the bathtub 50 by the heat pump unit 30 without driving the fan 306, and stores the water of about 45 ° C. inside the tank 101. It is also good. When the user wants to store water at a temperature higher than about 45 ° C. in the tank 101, the control device 70 drives the fan 306, for example, to drive the second liquid heat exchanger. The heat medium which has flowed out from 302 can be cooled. That is, after the water at about 45 ° C. is filled in the inside of the tank 101, the control device 70 is to store the water at a temperature higher than about 45 ° C. in the tank 101. For example, the heat medium flowing out of the second liquid heat exchanger 302 may be cooled by driving a fan 306 or the like.

  On the other hand, the frequency with which the user uses water at about 45 ° C. at night is lower than that in the daytime. For example, the user may want to store water at a temperature higher than about 45 ° C. inside the tank 101 because there is a relatively long time before the next morning. In this case, the control device 70 may cool the heat medium flowing out of the second liquid heat exchanger 302 by driving, for example, the fan 306 or the like. Thus, water having a temperature higher than about 45 ° C. can be stored inside the tank 101 by the next morning.

[Bath water heat recovery operation]
FIG. 33 is a view for explaining the hot water heat recovery operation of the hot water supply and heating system according to the present embodiment.
The hot water heat recovery operation is an operation of circulating the hot water remaining in the bath 50 and recovering the heat of the hot water with the water stored in the tank 101. Filled portions shown in FIG. 33 represent pipelines through which water flows in the bath heat recovery operation.

  If the hot water remains inside the bathtub 50 when the automatic operation is finished, the control device 70 executes control of the hot water heat recovery operation. When the controller 70 executes the bath water heat recovery operation, the bath pump 235 and the recovery pump 236 are driven. Also, the controller 70 opens the water control valve 114 and the bath switching valve 278.

  As shown by arrow A37 shown in FIG. 33, when the bath pump 235 is driven, the water in the bath 50 contains the first bath return pipe 623, the second bath return pipe 624, and the bath pump inlet pipe 626. It flows and is pumped to the bath pump outlet pipe 614 by the bath pump 235. The water flowing through the bath pump outlet pipe 614 is led to the second inner pipe 657 of the bath heat exchanger 207A. The temperature of the water flowing through the second inner pipe 657 of the bath heat exchanger 207A is, for example, about 40 ° C.

  On the other hand, when the recovery pump 236 is driven as indicated by an arrow A36 shown in FIG. 33, the water flowing through the first recovery pump inlet pipe 658 is sent out by the recovery pump 236 to the recovery pump outlet pipe 659. Water flowing through the recovery pump outlet pipe 659 is led to the inside of the tank 101. Since the water control valve 114 is open, the inside of the tank 101 flows through the water supply pipe 151 connected to the lower part of the tank 101, and is supplied to the gas boiler 20A via the mixed water introduction pipe 154.

  The water supplied to the gas heater 20A passes through the combustion device 201 and is led to the outlet pipe 607 of the hot water supply heat exchanger 206A. At this time, the combustion apparatus 201 does not perform the combustion operation. That is, the water flowing through the combustion apparatus 201 is not heated by the first burner 203 and the second burner 204. The water flowing through the outlet pipe 607 of the hot water supply heat exchanger 206A is led to the connection pipe 655 of the bath heat exchanger 207A branched from the outlet pipe 607 of the hot water supply heat exchanger 206A. As indicated by arrow A38 in FIG. 33, the water flowing through the connection pipe 655 of the bath heat exchanger 207A is led to the first inner pipe 656 of the bath heat exchanger 207A. The temperature of the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is, for example, about 15 ° C.

  At this time, the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is heated by the water flowing through the second inner pipe 657 of the bath heat exchanger 207A. The temperature of the water heated in the bath heat exchanger 207A and flowing out of the bath heat exchanger 207A and flowing through the intermediate pipe 653 is about 45 ° C., for example. On the other hand, the temperature of water flowing out of the bath heat exchanger 207A and flowing through the first bath transfer pipe 619 is, for example, about 30 ° C. or so.

  Water flowing in the intermediate pipe 653 is led to the first recovery pump inlet pipe 658. As indicated by an arrow A 36 shown in FIG. 33, the water flowing through the first recovery pump inlet pipe 658 is pumped by the recovery pump 236 to the recovery pump outlet pipe 659 and is led to the inside of the tank 101. The temperature of the water introduced into the tank 101 is, for example, about 45.degree.

  Thus, in the bath water heat recovery operation, the heat of the hot water remaining in the bath 50 is recovered by the water stored in the tank 101.

  In the hot water supply and heating system 2A of the present embodiment, the heating path (pipeline of the heating system) and the bathtub path (pipeline of the bathtub system) are separated from each other. Therefore, even when the bath water heat recovery operation is performed, at least a portion of the water inside the bath 50 does not return to the bath 50 and does not flow to the cistern 237, and does not overflow from the cistern 237.

[Low-temperature heating operation]
FIG. 34 is a diagram for explaining the low-temperature heating operation of the hot water supply and heating system according to the present embodiment.
The low-temperature heating operation is an operation of operating the low-temperature heating device 402 to heat a living room (including a floor surface). Filled portions shown in FIG. 34 represent pipelines through which water flows in the low-temperature heating operation.

  When the user presses a low temperature heating button (not shown), the control device 70 executes control of a hot dash operation that rapidly raises the temperature (for example, the floor surface temperature) of the living room where the low temperature heating device 402 is installed. . The hot dash operation is as described above with reference to FIG. The controller 70 continues the hot dash operation, for example, for about 30 minutes. Further, the control device 70 starts the operation of the heat pump unit 30 substantially simultaneously with the start of the hot dash operation.

  When the control device 70 performs control of the hot dash operation in the low temperature heating operation, the recovery pump 236 and the heating pump 275 are driven. Also, the controller 70 opens the hot water control valve 117.

  As indicated by an arrow A36 shown in FIG. 34, when the recovery pump 236 is driven, the water flowing through the first recovery pump inlet pipe 658 is pumped by the recovery pump 236 to the recovery pump outlet pipe 659. Water flowing through the recovery pump outlet pipe 659 is led to the inside of the tank 101. The temperature of the water introduced into the tank 101 is, for example, about 45.degree.

  Since the hot water control valve 117 is open as indicated by an arrow A35 shown in FIG. 34, water in the layer formed at the upper part in the tank 101 (for example, water at about 45 ° C.) It flows and is supplied to the gas boiler 20A. The water supplied to the gas boiler 20A flows inside the combustion apparatus 201 and is heated by at least one of the first burner 203 and the second burner 204. The temperature of the water heated in the hot water supply latent heat exchanger 205 is, for example, about 45.degree. The temperature of the water heated in the hot water supply heat exchanger 206A is, for example, about 80.degree.

  Subsequently, water (hot water) heated in the combustion apparatus 201 flows through the outlet pipe 607 of the hot water supply heat exchanger 206A and is conducted to the connection pipe 651 of the third liquid heat exchanger 272 via the water supply switching three-way valve 277. It is eaten. The water flowing through the connection pipe 651 of the third liquid heat exchanger 272 is led to the first inner pipe 652 of the third liquid heat exchanger 272, as indicated by an arrow A40 shown in FIG. The temperature of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is, for example, about 80.degree.

  On the other hand, as the arrow A33 shown in FIG. 34 shows, when the heating pump 275 is driven, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is pumped out to the heating pump outlet pipe 662 by the heating pump 275. The water flowing through the heating pump outlet pipe 662 is led to the inner pipe 352 of the first liquid heat exchanger 301 via the inlet pipe 615 of the first liquid heat exchanger 301. Water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is led to the outlet pipe 616 of the first liquid heat exchanger 301. The temperature of the water flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is, for example, about 30.degree. The water flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is led to the second inner pipe 654 of the third liquid heat exchanger 272.

  At this time, the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272 is heated by the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272. The temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is, for example, about 80.degree. On the other hand, the temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is about 45 ° C., for example.

  The water flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is led to the first high-temperature heating return pipe 627 branched from the outlet pipe 664 of the third liquid heat exchanger 272. The water flowing through the first high-temperature heating return pipe 627 is led to the first heating bypass pipe 663 branched from the first high-temperature heating return pipe 627. The water flowing through the first heating bypass pipe 663 is led to the second heating forward pipe 635 through the heat storage four-way valve 279.

  The water flowing through the second heating forward pipe 635 is supplied to the low temperature heating device 402 via the low temperature forward heating valve 241. The water supplied to the low-temperature heating device 402 is led to the heating return pipe 628 through the liquid junction portion 405 and returns to the cistern 237.

  On the other hand, the water flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is led to the first recovery pump inlet pipe 658. As indicated by arrow A36 in FIG. 34, the water flowing through the first recovery pump inlet pipe 658 is pumped by the recovery pump 236 to the recovery pump outlet pipe 659.

  When the room is cold, immediately after the hot dash operation of the low-temperature heating operation is started, the water at a temperature of about 80 ° C. supplied to the low-temperature heating device 402 is cooled, and as a cold water Return to The heat pump unit 30 has an ability to perform heat exchange when a predetermined time has elapsed from the start of operation. At this time, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the low-temperature heating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the low-temperature heating operation, the second liquid heat exchanger 302 functions as a cooler. Then, after a while after the time of the hot dash operation, the temperature of water returning to the cistern 237 starts to rise.

  Therefore, the control device 70 performs control of steady operation after performing hot dash operation for about 30 minutes, for example, after the user presses the low temperature heating button (not shown). Steady-state operation is as described above with reference to FIG.

  The pipeline through which water flows in the steady operation of the low temperature heating operation is the same as the pipeline through which water flows in the hot dash operation of the low temperature heating operation. In the hot dash operation, the water flowing through the first liquid heat exchanger 301 is not heated, while in the steady operation, the water flowing through the first liquid heat exchanger 301 is in the interior of the first liquid heat exchanger 301. The heat medium is heated by the heat medium flowing through the heat medium circulation path 351. The temperature of water flowing out of the first liquid heat exchanger 301 and flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is, for example, about 45 ° C. or so.

  The water flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is led to the second inner pipe 654 of the third liquid heat exchanger 272. At this time, the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272 is heated by the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272. The temperature of the water flowing out of the third liquid heat exchanger 272 and flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is, for example, about 60.degree. Thus, for example, water at a temperature of about 60 ° C. is supplied to the low temperature heating device 402.

[Low temperature low load heating operation]
35 and 36 are diagrams for explaining the low-temperature low-load heating operation of the hot water supply and heating system according to the present embodiment.
The low-temperature low-load heating operation is an operation of operating the low-temperature heating device 402 to heat a room (including a floor surface) using the heat pump unit 30. Filled portions shown in FIGS. 35 and 36 represent pipelines through which water flows in the low-temperature low-load heating operation.

  As described above with reference to FIG. 34, in the steady operation of the low temperature heating operation, for example, water at a temperature of about 60 ° C. is supplied to the low temperature heating device 402. Here, in order to suppress an excessive rise in the temperature of the living room, the control device 70 executes control of the low-temperature low-load heating operation. In the low temperature low load heating operation, for example, water at a temperature of about 40 ° C. is supplied to the low temperature heating device 402.

  As shown in FIG. 35, when the control device 70 executes control of the low temperature and low load heating operation, the heating pump 275 is driven. Further, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the low temperature and low load heating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the low temperature and low load heating operation, the second liquid heat exchanger 302 functions as a cooler.

  As indicated by an arrow A33 shown in FIG. 35, when the heating pump 275 is driven, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is sent out to the heating pump outlet pipe 662 by the heating pump 275. The water sent to the heating pump outlet pipe 662 flows through the inlet pipe 615 of the first liquid heat exchanger 301 and is guided to the inner pipe 352 of the first liquid heat exchanger 301.

  The water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated in the first liquid heat exchanger 301. The temperature of the water flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is, for example, about 45.degree. The water that has flowed out of the first liquid heat exchanger 301 is led to the first heating feed pipe 617 via the heat pump outlet three-way valve 244A. The water flowing through the first heating return pipe 617 is led to the second heating return pipe 635 through the heat storage four-way valve 279.

  The water flowing through the second heating forward pipe 635 is supplied to the low temperature heating device 402 via the low temperature forward heating valve 241. Thus, for example, water at a temperature of about 40 ° C. is supplied to the low temperature heating device 402. The water supplied to the low-temperature heating device 402 is led to the heating return pipe 628 through the liquid junction portion 405 and returns to the cistern 237. In the low-temperature low-load heating operation, since the low-temperature heating device 402 is operated using the heat pump unit 30, energy efficiency can be improved.

  For example, if the insulation performance of the living room is relatively high, even if the temperature of the water supplied to the low-temperature heating device 402 is, for example, about 40 ° C., the temperature of the living room may rise excessively. In this case, as shown in FIG. 36, the control device 70 does not control the operation start / stop of the heat pump unit 30, but uses the water heated in the first liquid heat exchanger 301 as the third liquid. It leads to the heat exchanger 272. That is, the water flowing out of the first liquid heat exchanger 301 flows through the outlet pipe 616 of the first liquid heat exchanger 301 via the heat pump outlet three-way valve 244A and is led to the third liquid heat exchanger 272. .

  Meanwhile, the control device 70 starts the operation of the recovery pump 236. When the recovery pump 236 is driven, the water flowing out of the lower part of the tank 101 flows through the first feed water connection pipe 667 via the recovery switching four-way valve 285, and as shown by arrow A40 in FIG. It is led to the connection pipe 651 of the third liquid heat exchanger 272 via 277. The water having flowed through the connection pipe 651 of the third liquid heat exchanger 272 is led to the first inner pipe 652 of the third liquid heat exchanger 272. At this time, the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272 is heated by the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272. The temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is about 45 ° C., for example.

  Water flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is led to the first recovery pump inlet pipe 658. As indicated by arrow A36 in FIG. 36, the water flowing through the first recovery pump inlet pipe 658 is pumped by the recovery pump 236 to the recovery pump outlet pipe 659. Water flowing through the recovery pump outlet pipe 659 is led to the inside of the tank 101. The temperature of the water introduced into the tank 101 is, for example, about 45.degree.

  In this manner, the control device 70 switches the heat pump outlet three-way valve 244A to lead the water heated in the first liquid heat exchanger 301 to the low-temperature heating device 402, and the third liquid heat exchange. And the state of being guided to the device 272. Thus, in the low-temperature low-load heating operation, an excessive rise in the room temperature is suppressed, and a decrease in the efficiency of the heat pump unit 30 is suppressed.

[First high-temperature heating operation]
FIG. 37 is a diagram for describing a first high-temperature heating operation of the hot water supply and heating system according to the present embodiment.
The first high-temperature heating operation is an operation of operating the high-temperature heating device 401 to heat a room (for example, a bathroom). Filled portions shown in FIG. 37 represent pipelines through which water flows in the first high-temperature heating operation.

  When the user presses the high temperature heating button (not shown), the controller 70 executes control of the first high temperature heating operation. When the controller 70 executes control of the first high-temperature heating operation, the recovery pump 236 and the heating pump 275 are driven. Also, the controller 70 opens the hot water control valve 117.

  The flow of water when the recovery pump 236 is driven in the first high-temperature heating operation is the same as the flow of water when the recovery pump 236 is driven in the low-temperature heating operation described above with reference to FIG. However, in the first high-temperature heating operation, the temperature of water introduced to the inside of the tank 101 is, for example, about 60 ° C. Therefore, the temperature of the water flowing through the mixed water introduction pipe 154 and supplied to the gas boiler 20A is, for example, about 60.degree. The temperature of the water heated in the hot water supply heat exchanger 206A is, for example, about 80 ° C.

  On the other hand, as the arrow A33 shown in FIG. 34 shows, when the heating pump 275 is driven, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is pumped out to the heating pump outlet pipe 662 by the heating pump 275. Water flowing through the heating pump outlet pipe 662 is led to the second heating bypass pipe 665 via the heat pump inlet three-way valve 243. That is, the water flowing through the heating pump outlet pipe 662 does not pass through the first liquid heat exchanger 301.

  The water flowing through the second heating bypass pipe 665 is led to the outlet pipe 616 of the first liquid heat exchanger 301. The temperature of the water flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is, for example, about 30.degree. The water flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is led to the second inner pipe 654 of the third liquid heat exchanger 272.

  At this time, the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272 is heated by the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272. The temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is, for example, about 80.degree. On the other hand, the temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the intermediate pipe 653 is about 60 ° C., for example.

  The water flowing through the outlet pipe 664 of the third liquid heat exchanger 272 passes through the first high-temperature heating forward pipe 627 branched from the outlet pipe 664 of the third liquid heat exchanger 272 and the third heat storage four-way valve 279 1 is led to the heating bypass pipe 663. The water flowing through the first heating bypass pipe 663 joins the water flowing through the first high-temperature heating return pipe 627, flows through the second high-temperature heating return pipe 451, and is supplied to the high-temperature heating device 401. The temperature of the water supplied to the high-temperature heating device 401 is, for example, about 80.degree. The water supplied to the high-temperature heating device 401 is led to the heating return pipe 628 via the liquid junction portion 405 and returns to the cistern 237.

[Second high-temperature heating operation]
FIG. 38 is a diagram for describing a second high-temperature heating operation of the hot water supply and heating system according to the present embodiment.
The second high-temperature heating operation described with reference to FIG. 38 is an operation of operating the high-temperature heating device 401 to heat a living room (for example, a bathroom), as in the first high-temperature heating operation described above with reference to FIG. is there. Filled portions shown in FIG. 38 represent pipelines through which water flows in the second high-temperature heating operation.

  When the heat pump unit 30 is in operation when the user presses the high-temperature heating button (not shown), the control device 70 controls the second high-temperature heating operation described with reference to FIG. Run. When the controller 70 executes control of the second high-temperature heating operation, the recovery pump 236 and the heating pump 275 are driven. Also, the controller 70 opens the hot water control valve 117. Furthermore, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the second high-temperature heating operation, the first liquid heat exchanger 301 functions as a heater. On the other hand, in the second high-temperature heating operation, the second liquid heat exchanger 302 functions as a cooler.

  The flow of water when the recovery pump 236 is driven in the second high-temperature heating operation is the same as the flow of water when the recovery pump 236 is driven in the first high-temperature heating operation described above with reference to FIG. The temperature of the water flowing through the pipe is the same as the temperature of the water flowing through the pipe in the first high temperature heating operation described above with reference to FIG. That is, the temperature of the water introduced into the tank 101 is, for example, about 60 ° C. The temperature of the water flowing through the mixed water introduction pipe 154 and supplied to the gas boiler 20A is, for example, about 60.degree. The temperature of the water heated in the hot water supply heat exchanger 206A is, for example, about 80 ° C.

  On the other hand, as the arrow A33 shown in FIG. 34 shows, when the heating pump 275 is driven, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is pumped out to the heating pump outlet pipe 662 by the heating pump 275. The water flowing through the heating pump outlet pipe 662 is led to the inner pipe 352 of the first liquid heat exchanger 301 via the inlet pipe 615 of the first liquid heat exchanger 301.

  At this time, the water flowing through the inner pipe 352 of the first liquid heat exchanger 301 is heated by the heat medium flowing through the heat medium circulation path 351 inside the first liquid heat exchanger 301. The temperature of water flowing out of the first liquid heat exchanger 301 and flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is, for example, about 45 ° C. or so.

  The water flowing through the outlet pipe 616 of the first liquid heat exchanger 301 is led to the second inner pipe 654 of the third liquid heat exchanger 272. At this time, the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272 is heated by the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272. The temperature of water flowing out of the third liquid heat exchanger 272 and flowing through the outlet pipe 664 of the third liquid heat exchanger 272 is, for example, about 80.degree. Thus, for example, water at a temperature of about 80 ° C. is supplied to the high-temperature heating device 401. Note that, for example, water at a temperature of about 80 ° C. is supplied to the high-temperature heating device 401, and the pipeline when returning to the cistern 237 is the same as the pipeline in the first high-temperature heating operation described above with reference to FIG.

[High-temperature heating operation + 1st pouring operation]
FIG. 39 is a diagram for explaining the high-temperature heating operation and the first pouring operation of the hot water supply and heating system according to the present embodiment.
In the hot water supply and heating system 2A according to the embodiment of the present invention, the operation described with reference to FIG. 39 is a warm bathroom by the heat storage hot water filling operation using the tank 101 and the high temperature heating operation by the gas combustion of the combustion device 201 Control processing for comfortable bathing.

  As shown in FIG. 39, in order to bathe in a warm bathroom in the winter, pouring hot water into the bath tub 50 while heating the inside of the bathroom at a high temperature by the heat storage pouring operation and the high temperature heating operation by gas combustion. Thus, the user can enjoy a comfortable bath by the hot water in the bathtub 50 in the warm bathroom. That is, after all the heat of the hot water of the combustion apparatus 201 obtained by the combustion of the gas is supplied to the high temperature heating apparatus 401 side, the heat of the surplus hot water is supplied to the water in the hot water storage tank 101. There is.

When the user presses the automatic water filling button in a state where there is no water in the bathtub 50, it takes 10 minutes to fill the water by pouring water, but it takes about 10 minutes to check the temperature without much reheating It is. That is, the time required for the pouring operation in the case of pouring water by the automatic pouring operation from the state where there is no water in the bathtub 50 is shorter than the time required for the pouring operation performed after bath heat is recovered. .
On the other hand, heating time in the bathroom needs about 30 minutes. That is, with regard to a bathroom heating apparatus (for example, a high-temperature heating apparatus 401), the maximum capacity of the heating apparatus may be rate-limiting. Then, it may take time to bring the bathroom to a comfortable temperature.

Therefore, the hot water supply and heating system 2A according to the present embodiment performs pouring of water into the bathtub 50 while heating the bathroom. At that time, the control device 70 supplies the heat of the water heated in the combustion device 201 to the high temperature heating device 401 via the third liquid heat exchanger 272 and the remaining heat after being supplied to the high temperature heating device 401. Control of supplying water to the inside of the bathtub 50 through the tank 101. Moreover, by efficiently performing so-called double transfer of hot water, pouring is efficiently performed using both the third bath forward pipe 621 and the first bath return pipe 623, so that the efficiency of pouring in the bath 50 is enhanced. It can be done well.
In this case, the control device 70 feeds water by the direct pressure of the water supply from the water department, controls the water control valve 114 and the hot water control valve 117, starts driving the recovery pump 236, and operates at high rotation speed. Start driving the heating pump 275 and start driving the bath pump 235. The heat pump unit 30 is in a stopped state.

When the user presses the automatic button, the control device 70 starts an operation (water filling operation) to perform automatic water filling by pouring water into the bathtub 50.
The controller 70 opens at least one of the water control valve 114 and the hot water control valve 117. Then, the water flows through the mixed water introduction pipe 154 by the pressure of the water supplied from the water supply source, and is supplied to the side of the gas boiler 20A. The temperature of the water supplied to the gas boiler 20A is, for example, about 45.degree. The temperature of the water supplied from the water source is, for example, about 15 ° C.

  When the recovery pump 236 starts driving to increase the rotational speed, the water sent from the recovery pump 236 flows through the recovery pump outlet pipe 659 through the third recovery three-way valve 284 and is led to the inside of the tank 101. . The temperature of the water introduced into the tank 101 is, for example, about 60.degree.

The water from the tank 101 and the water supplied at normal pressure are mixed by the mixed water introduction pipe 154 and introduced to the mixed water introduction pipe 154. Thus, the relatively high temperature water from the tank 101 and the water supplied at normal pressure are mixed in the mixed water introduction pipe 154. Therefore, the temperature of the water poured into the bath 50 can be controlled. That is, water of controlled temperature can be introduced to the bath with high accuracy. In addition, since the temperature of the water poured into the bath 50 is controlled by controlling the temperature of the mixed water in the mixed water introduction pipe 154, the control temperature and the actual temperature of the water (detected temperature) are controlled. It is possible to suppress the time lag that occurs.
The water that has entered the mixed water introduction pipe 154 is supplied to the gas boiler 20A, passes through the combustion device 201, and is led to the outlet pipe 607 of the hot water supply heat exchanger 206A. The water flowing through the combustion device 201 is heated by the first burner 203 and the second burner 204. The temperature of the water heated by the combustion device 201 is, for example, about 80.degree.

  The water flowing through the outlet pipe 607 of the hot water supply heat exchanger 206A is led to the connection pipe 651 of the third liquid heat exchanger 272 via the water supply switching three-way valve 277. The water flowing through the connection pipe 651 is led to the first inner pipe 652 of the third liquid heat exchanger 272.

  At this time, the temperature of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is, for example, about 80.degree. Then, the water flowing in the first inner pipe 652 of the third liquid heat exchanger 272 heats the water flowing in the second inner pipe 654 of the third liquid heat exchanger 272. In other words, the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272 is heated by the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272. Water flowing through the intermediate pipe 653 is led from the intermediate pipe 653 to the first recovery pump inlet pipe 658 and returns to the recovery pump 236.

Further, the water that has entered the mixed water introduction pipe 154 is branched by the bypass servo 222, and passes from the mixed water introduction pipe 154 through the hot water supply bypass pipe 611. Water passing through the hot water supply bypass pipe 611 is conducted to the third pouring pipe 645 via the pouring electromagnetic valve 266, the check valve 267, the check valve 268, and the second pouring pipe 644. It is eaten. At this time, the bath pump 235 is stopped.
The water led to the third pouring pipe 645 branches and flows to the bath pump inlet pipe 626 and the bathtub bypass pipe 631 via the solenoid valve 281.

  The water led to the bathtub bypass pipe 631 flows through the second bath return pipe 624 and the first bath return pipe 623, and is supplied to the bath 50. Then, the water led to the bath pump inlet pipe 626 flows through the second inner pipe 657 of the bath heat exchanger 207A, the first bath incoming pipe 619, and the second bath incoming pipe 621, It is supplied to the bathtub 50. That is, pouring of water into the bath 50 is performed using a so-called double transfer method of hot water. Thereby, the piping resistance between the gas heating unit 20A and the bath 50 is suppressed, and the pouring operation is completed in a shorter time. Therefore, pouring of water into the bath 50 can be efficiently performed.

  In the case of this pouring operation, the temperature of one flow of water sent into the bathtub 50 through the second bathing pipe 621 and the other flow of water fed into the bathtub 50 through the first bath return pipe 623. The temperatures of are the same as each other, for example, about 45.degree. Therefore, water of a temperature controlled with high accuracy is guided to the bathtub 50 by double conveyance.

  When the controller 70 starts driving the heating pump 275, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is pumped by the heating pump 275 to the heating pump outlet pipe 662. The water pumped to the heating pump outlet pipe 662 is led to the second heating bypass pipe 665 through the heat pump inlet three-way valve 243. The water introduced to the second heating bypass pipe 665 passes through the outlet pipe 616 of the first liquid heat exchanger 301 and the second inner pipe 654 of the third liquid heat exchanger 272, It enters the high temperature heating device 401 via the outlet pipe 664 of the third liquid heat exchanger 272, the first high temperature heating return pipe 627, and the second high temperature heating return pipe 451.

  At this time, the temperature of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is, for example, about 80.degree. Then, the water flowing in the first inner pipe 652 of the third liquid heat exchanger 272 heats the water flowing in the second inner pipe 654 of the third liquid heat exchanger 272. In other words, the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272 is heated by the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272. The temperature of the water heated in the third liquid heat exchanger 272 and led to the high-temperature heating device 401 is, for example, about 80 ° C. or so. Thus, an operation of heating the bathroom (high temperature heating operation by the high temperature heating device 401) is performed.

  As described above, in the hot water supply heating system 2A, the control device 70 supplies the heat of the water heated in the combustion device 201 to the high temperature heating device 401 via the third liquid heat exchanger 272, and the high temperature heating device 401 Control to supply the remaining heat after being supplied to the water inside the bath 50 through the tank 101.

  According to this, the control device 70 performs the filling operation of the bathtub 50 while heating the bathroom using a large amount of heat preferentially supplied to the high-temperature heating device 401. Therefore, the user can bathe comfortably in the warm bathroom early. Further, the control device 70 performs the pouring operation of the bathtub 50 while heating the bathroom with the high-temperature heating device 401. Therefore, it is possible to perform heating of the bathroom, which takes more time than pouring time, continuously at the pouring operation. Therefore, the user can enjoy a comfortable bath in the early heated bathroom in the winter.

  Further, the control device 70 guides the water heated in the combustion device 201 to the third liquid heat exchanger 272 and then guides the water to the inside of the tank 101, and the water inside the tank 101 and the water supplied from the water supply source. And the water in the tank 101 by heating. Then, the control device 70 executes control for guiding the water heated inside the tank 101 to the bath 50. That is, the heat of the hot water coming out of the outlet pipe 607 of the hot water supply heat exchanger 206A is used for heating in the high temperature heating device 401. Moreover, the heat of the surplus hot water after being used for heating in the high-temperature heating device 401 is used for heating the water in the tank 101.

  According to this, the control device 70 mixes the relatively high temperature water (the water inside the tank 101) and the relatively low temperature water (the water supplied from the water supply source), and the tub 50 You can control the temperature of the water led to the Thus, it is possible to guide the water of the temperature controlled with high accuracy to the bath 50, and to suppress the time lag generated between the control temperature and the actual temperature of the water (detected temperature).

  Further, while the hot water heating system 2A moves from the high temperature heating operation and the second reheating operation to the high temperature heating operation and the second pouring operation, the control device 70 keeps the heat pump unit 30 continuously operating. The water level inside the bathtub 50 may be detected by the water level sensor 255. When detecting the water level inside the bathtub 50 by the water level sensor 255, the control device 70 stops the combustion operation of the combustion device 201 while continuing the heating operation of the heat pump unit 30, and the bath pump 235 and the heating pump The control of stopping the driving of 275 and opening the defrost valve 308 of the heat pump unit 30 is executed. Thereby, even when the operation of the hot water supply and heating system 2A is switched from the reheating operation to the pouring operation, the heating operation of the heat pump unit 30 is continued. Therefore, it can suppress that the efficiency of the heat pump part 30 falls. In addition, the control device 70 stops the combustion operation of the combustion device 201, stops the driving of the bath pump 235 and the heating pump 275, and opens the defrost valve 308 of the heat pump unit 30 to move water in the pipe. Can be reduced. Thus, the water level sensor 255 can detect the water level inside the bathtub with high accuracy.

[High-temperature heating operation + second repelling operation]
FIG. 40 is a diagram for explaining the high-temperature heating operation and the second reheating operation of the hot water supply and heating system according to the present embodiment.
The operation described with reference to FIG. 40 is that in the hot water supply heating system 2A of the present embodiment, while heating the bathroom in the winter, the bath water is bathed in the warm bathroom in the shortest time by chasing away the water in the bathtub It relates to the process of control that can be done.

  For example, when the user tries to take a bath in a bathroom heated in winter, the gas boiling unit 20 and the heat pump unit 30 can perform the water filling operation and the reheating operation of the bathtub 50 with the maximum ability. On the other hand, the maximum capacity of the heating device (for example, the high-temperature heating device 401) of the bathroom may be the rate-limiting function. Then, it may take time to bring the bathroom to a comfortable temperature. For this reason, in winter, it takes time to prepare to be able to take a comfortable bath in a heated and warm bathroom.

As shown in FIG. 40, when the control device 70 executes the reheating operation, the bath pump 235, the recovery pump 236, and the heating pump 275 are driven.
Further, the compressor 304 of the heat pump unit 30 supplies the heat medium to the first liquid heat exchanger 301 via the four-way switching valve 307. Therefore, in the reheating operation, the first liquid heat exchanger 301 functions as a heater, and the second liquid heat exchanger 302 functions as a cooler.

  When the controller 70 drives the heating pump 275, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is pumped by the heating pump 275 to the heating pump outlet pipe 662. The water flowing through the heating pump outlet pipe 662 passes through the first liquid heat exchanger 301 and the third liquid heat exchanger 272, and the outlet pipe 664 of the third liquid heat exchanger 272 and the first high-temperature heating system. The high temperature heater 401 is entered via the pipe 627. The temperature of the water heated in the first liquid heat exchanger 301 and the third liquid heat exchanger 272 and led to the high-temperature heater 401 is, for example, about 80 ° C. or so. Thus, an operation of heating the bathroom (high temperature heating operation by the high temperature heating device 401) is performed. The water that has passed through the high-temperature heating device 401 enters the cistern 237 through the heating return pipe 628.

  On the other hand, when the recovery pump 236 is driven, the water sent from the recovery pump 236 flows through the recovery pump outlet pipe 659 through the third recovery three-way valve 284 and is led to the inside of the tank 101. The temperature of the water introduced into the tank 101 is, for example, about 45.degree.

The water of the tank 101 is supplied to the gas boiler 20A through the mixed water introduction pipe 154, passes through the combustion device 201, and is led to the outlet pipe 607 of the hot water supply heat exchanger 206A. The water flowing through the combustion device 201 is heated by the first burner 203 and the second burner 204. The temperature of the water heated by the combustion device 201 and flowing through the outlet pipe 607 of the hot water supply heat exchanger 206A is, for example, about 80.degree.
The water flowing through the outlet pipe 607 of the hot water supply heat exchanger 206A flows into the connection pipe 651 and is led to the first inner pipe 652 of the third liquid heat exchanger 272.

  At this time, the temperature of the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272 is, for example, about 80.degree. Then, the water flowing through the first inner pipe 652 heats the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272. In other words, the water flowing through the second inner pipe 654 of the third liquid heat exchanger 272 is heated by the water flowing through the first inner pipe 652 of the third liquid heat exchanger 272. The water flowing through the intermediate piping 653 heats the water passing through the second inner pipe 657 of the bath heat exchanger 207A by flowing through the first inner pipe 656 of the bath heat exchanger 207A. In other words, the water passing through the second inner pipe 657 of the bath heat exchanger 207A is heated by the water flowing through the first inner pipe 656 of the bath heat exchanger 207A. Then, the water passing through the first inner pipe 656 returns to the collection pump 236 via the connection pipe 655 and the second collection pump inlet pipe 666.

  When the control device 70 drives the bath pump 235, the water inside the bath 50 flows through the first bath return pipe 623, the second bath return pipe 624, and the bath pump inlet pipe 626, and the bath pump 235 It is sent out to the bath pump outlet pipe 614 by The water flowing through the bath pump outlet pipe 614 is led to the second inner pipe 657 of the bath heat exchanger 207A. At this time, the temperature of the water flowing through the second inner pipe 657 of the bath heat exchanger 207A is, for example, about 35 ° C.

  On the other hand, the temperature of the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is, for example, about 60 ° C. or so. Thus, the water flowing through the first inner pipe 656 of the bath heat exchanger 207A heats the water flowing through the second inner pipe 657 of the bath heat exchanger 207A to, for example, 45 ° C. The water having flowed through the second inner pipe 657 of the bath heat exchanger 207A returns to the bathtub 50 through the first bath forwarding pipe 619 and the second bath forwarding pipe 621. The temperature of the water returned to the bath 50 is, for example, about 45.degree. As a result, an operation to repel water inside the bathtub 50 is performed.

  As described above, in the hot water supply and heating system 2A shown in FIG. 40, the hot water coming from the outlet pipe 607 of the hot water supply heat exchanger is used for both heating by the high temperature heating device 401 and reheating of the bathtub 50. Can. Then, the hot water supply heating system 2A shown in FIG. 40 preferentially sends the heat of hot water heated in the heat pump unit 30 and the combustion apparatus 201 to the high temperature heating apparatus 401 via the third liquid heat exchanger 272. For this reason, the heat of hot water obtained by the combustion device 201 is first supplied to the high temperature heating device 401 side via the third liquid heat exchanger 272, and thereafter, inside the bath 50 via the bath heat exchanger 207A. Supplied in hot water. The third liquid heat exchanger 272 of the present embodiment corresponds to the “heating side liquid heat exchanger” of the present invention.

  As a result, more heat can be preferentially supplied to the high-temperature heating device 401 by the third liquid heat exchanger 272. For this reason, the user can take a comfortable bath in the warm bathroom early by chasing the water in the bathtub 50 while heating the bathroom using a large amount of heat supplied preferentially.

  Further, the control device 70 can synchronize the heating end time of the bathroom and the reheating end time in the winter. Therefore, the user can set a warm bathroom at a time when the temperature in the bath 50 is increased, so that the waiting time can be shortened and the bath can be comfortable in the shortest time. By reheating while heating, the most time-consuming heating can always be performed continuously during reheating, and you can bath comfortably in the shortest heated bathroom.

  As described above, in the hot water supply and heating system 2, 2A of the present invention, the control device 70 performs the heating operation of the high temperature heating device 401 by executing the heating operation of the heat pump unit 30 and the combustion operation of the combustion device 201. While performing the reheating operation, control is performed to supply the heat of the water heated in the heat pump unit 30 and the combustion device 201 to the high-temperature heating device 401 and then supply the water inside the bathtub 50.

  Thereby, more heat can be preferentially supplied to the high temperature heating device 401. For this reason, the user can take a comfortable bath in the warm bathroom early by chasing the water in the bathtub 50 while heating the bathroom using a large amount of heat supplied preferentially.

  The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the claims. The configuration of the above embodiment can be partially omitted or can be arbitrarily combined to be different from the above.

2, 2A: hot water supply heating system, 10, 10A: tank unit, 20, 20A: gas water heater, 21: case, 30: heat pump unit, 31: intake unit, 32: Exhaust part, 33: Housing, 40: Heating device, 50: Bath, 70: Control device, 101: Tank, 102: Pressure reducing valve, 103 .. · Plate heat exchanger, 104 · · · Drain valve, 111 · · · First tank surface thermistor, 112 · · · Second tank surface thermistor, 113 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · plate heat exchanger Valve, 115: water amount sensor, 116: water temperature thermistor, 117: hot water control valve, 118: hot water amount sensor, 119: hot water temperature thermistor, 121: mixed thermistor, 123: Plate entrance -Mista, 151: water supply pipe, 152: water introduction pipe, 153: hot water introduction pipe, 154: mixed water introduction pipe, 201: combustion device, 202: combustion chamber, 203 · · First burner, 204 · · · second burner, 205 · · · hot water latent heat exchanger, 206, 206A · · · hot water heat exchanger, 207, 207A · · · bath heat exchanger, 208 · · · · · Combustion fan, 211 · · · Source gas solenoid valve, 212 · · · Gas proportional valve, 213 · · · first gas solenoid valve, 214 · · · second gas solenoid valve, 215 · · · · · · · · , 216: flame rod, 217: overheat prevention device, 218: water tube thermistor, 219: heat exchange thermistor, 221: water quantity sensor 222, bypass servo, 223: hot water supply thermistor , 224 · · Hot water amount servo, 225 · · · hot water supply tray, 226 · · · exhaust port, 227 · · · drain valve, 228 · · · intake port, 231 · · · · · · · · · · · · · · · · · · · · Electrode 233: drain tank 234: water level electrode 235: bath pump 236: recovery pump 237: cisturn 238: water level electrode 239: overflow valve, 241 ··· Thermal valve, 242 ··· Solenoid valve, · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · heat pump outlet three-way valve 244A · · · heat pump outlet three-way valve · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Four-way return valve, 251 · · · · · · · Second drain switching three-way valve, 253 · · · bath water flow switch, 254 · · · bath return thermistor, 255 · · · water level sensor, 256 · · · first bath passing thermistor, 257 · · · second The bath passing thermistor, 258 ... solenoid valve, 259 ... first low-temperature ability four-way valve, 261 ... second low-temperature ability four-way valve, 262 ... heat storage three-way valve, 263 ... low-temperature ability switching Valve, 264: solenoid valve, 265: check valve, 266: pouring solenoid valve, 267, 268, check valve, 269: hot water amount sensor, 271: pouring three direction Valve 272: Third liquid heat exchanger 274: Circulating water amount sensor 275: Heating pump 276: Replenish water solenoid valve 277: Water supply switching three-way valve 278・ Bath switching valve, 279 ・ ・ ・ heat storage in all directions 281: solenoid valve 282: first recovery three-way valve 283: second recovery three-way valve 284: third recovery three-way valve 285: recovery switching four-way valve 286 ... check valve, 287 ... inlet thermistor, 288 ... connecting tube thermistor 289 ... heating high temperature thermistor, 291 ... intermediate piping thermistor, 292 ... bath heat exchanger thermistor, 293 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · The first liquid heat exchanger · Compressor · · · · 305 expansion valve, 306 · · · fan · 307 · · · four-way switching valve · · · · · · · defrost valve, 311 · · · inlet thermistor, 312 · · · outlet thermistor, 313 · · ·・ Drain stopper, 3 4 ... pressure sensor, 315 ... air supply port, 325 ... exhaust port, 351 ... heat medium circulation path, 352, 353 ... inner pipe, 354 ... heat medium bypass pipe, 355 ··· Exit pipe, 356 · · · Inlet pipe, 357 · · · · · · · · · · · · · · · high temperature heating system, 402 · · · low temperature heating system, 403 · · · heating fan, 404 · · · thermal movement Valve, 405: liquid junction, 451: second high-temperature heating return pipe, 452: high-temperature heating return pipe, 453: low-temperature heating return pipe, 454: low-temperature heating return pipe, 601 ... gas pipe, 602 ... first gas branch pipe, 603 ... second gas branch pipe, 604 ... inlet pipe, 605 ... outlet pipe, 606 ... inlet pipe, 607 ... outlet pipe, 608 ... inlet pipe, 609 ... outlet pipe, 61 ... hot water supply bypass pipe, 612 ... hot water supply pipe, 613 ... heat recovery circulation path, 614 ... bath pump outlet pipe, 615 ... inlet pipe, 616 ... outlet pipe, 617 ... First heating forward pipe 618: heating bypass pipe 619: first bath traveling pipe 621: second bath traveling pipe 622: third bath traveling pipe 623 · · First bath return pipe, 624 · · · second bath return pipe, 625 · · · third bath return pipe, 626 · · · bath pump inlet pipe, 627 · · · first high-temperature heating going Pipes 628: heating return pipe 629: cistern outlet pipe 631: bathtub bypass pipe 632: first low temperature capacity pipe 633: second low temperature capacity pipe 634 · · · Third low-temperature capacity tube, 635 · · · second heating forward tube, 636 · · · · Third heating incoming pipe, 637 · · · fourth heating incoming pipe, 638 · · · tank incoming pipe, 639 · · · drain discharge pipe, 641 · · · first drain tank outlet pipe, 642 · · ·・ Second drain tank outlet pipe, 643 ・ ・ ・ First pouring pipe, 644 ・ ・ ・ Second pouring pipe, 645 ・ ・ ・ Third pouring pipe, 646 ... Plate forward pipe, 651 ... connection pipe, 652 ... first inner pipe, 653 ... intermediate pipe, 654 ... second inner pipe, 655 ... connection pipe, 656 ... first inner pipe 657 ... second inner pipe, 658 ... first recovery pump inlet pipe, 659 ... recovery pump outlet pipe, 661 ... hot water supply incoming pipe, 662 ... heating pump outlet pipe, 663 ... 1st heating bypass pipe, 664 ... outlet pipe, 665 ... 2nd heating bypass pipe, 666 ... second recovery pump inlet pipe, 667 ... first water supply connection pipe, 668 ... second water supply connection pipe, 691 ... first common pipe, 692 ... second Common pipe of

Claims (7)

A tank unit having a tank for storing water supplied from a water supply source;
A gas boiler having a combustion device that heats supplied water by combustion of a burner;
A heat pump unit having a heat medium circulation path for circulating a heat medium, and performing heat exchange between the heat medium and the supplied water;
A pipe line of a bathtub system that connects at least one of the combustion apparatus and the heat pump unit and a bathtub and circulates water;
A pipe line of a heating system including a cistern for connecting water and circulating at least one of the combustion apparatus and the heat pump unit and a heating apparatus;
A control device that controls operations of the tank unit, the gas boiling unit, and the heat pump unit;
Equipped with
The control device heats the water supplied from the water supply source while executing the heating operation of the heating device that supplies warm air to the inside of the bathroom by executing the combustion operation of the combustion device, and sends it to the bathtub When performing the filling operation, the heat of the water heated in the combustion device is supplied to the heating device, and the remaining heat after being supplied to the heating device is supplied to the water inside the bathtub Hot water supply heating system characterized by performing control. The gas water heater is
A cistern connected to the heating device, which stores water inside and functions as a reservoir for removing air;
An outgoing pipe connected to the bathtub,
A return pipe connected to the bathtub and different from the forward pipe;
Have
The control unit guides all of the water heated in the combustion unit to the cistern and then leads it to the heating unit, and the water that has passed through the heating unit to the bathtub using the forward pipe and the return pipe. The hot water supply heating system according to claim 1, wherein the control to lead is performed.   The control device supplies the heat of the water heated by executing the heating operation of the heat pump unit to the water inside the tank to heat the water inside the tank, and the water inside the tank The hot water supply heating system according to claim 1 or 2, wherein control is performed to lead water mixed with the water supplied from the water supply source to the combustion device. The gas boiler includes a bath-traveling thermistor provided in a pipe line of the bathtub system and detecting a temperature of water led to the bathtub.
The control device is configured to perform a temperature field back based on a temperature detected by the bath trip thermistor when a predetermined time based on a capacity of a conduit disposed in the heating device has elapsed since the start of the pouring operation. The hot water supply heating system according to any one of claims 1 to 3, wherein control is performed.   The control device stops the combustion operation of the combustion device just before guiding a predetermined amount of heated water to the bath and ending the pouring operation, and sends the water supplied from the water supply source to the heating device. The combustion operation of the combustion device is restarted and supplied from the water supply source at a timing based on the capacity of the pipe going from the tank portion to the bathtub via the combustion device and the heating device while being supplied. The hot water supply heating system according to any one of claims 1 to 4, wherein control to heat water is executed. The gas water heater is
A bath pump provided in a pipe line of the bathtub system and circulating water inside the bathtub;
A water level sensor for detecting the water level inside the bathtub;
Have
The heat pump unit includes a defrost valve provided in a heat medium bypass pipe branched from the heat medium circulation path and adjusting the pressure of the heat medium,
The control device stops the combustion operation of the combustion device while continuing the heating operation of the heat pump unit, stops the drive of the bath pump, opens the defrost valve, and the water level is detected by the water level sensor. The hot water supply heating system according to any one of claims 1 to 5, wherein control to detect is performed. The gas boiler has a liquid heat exchanger on the heating side that supplies the heat of the water heated in the combustion device to the heating device.
The control device guides the water heated in the combustion device to the liquid heat exchanger on the heating side and then guides the water to the inside of the tank, and the water inside the tank and the water supplied from the water supply source. The hot water supply heating system according to claim 1 or 2, wherein control to introduce heated water to the bath is performed by mixing.

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