JP2019117009A - Hot water supply heating system - Google Patents

Abstract

To provide a hot water supply heating system capable of suppressing deterioration of efficiency, even in a case of alternately supply, to a heater and a tank part, heat of water heated by heating operation of a heat pump part.SOLUTION: A controller 70 of a hot water supply heating system 2 is configured to, in a case of alternately supplying to a heater 402 and a tank part 10 heat of water heated by heating operation of a heat pump part 30, execute switching control of switching operations from operation of supplying to the heater 402 the heat of the water heated by the heating operation to operation of supplying the heat to the tank part 10 when the water heated by the heating operation flows through a pipe 402T of the heater 402 and then flows out from the pipe 402T of the heater 402.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 hot water storage type hot water supply heat source apparatus provided with a heat pump device capable of executing a heating operation of heating hot and cold water in a hot water storage tank and an air conditioning operation of conditioning the air conditioning target space. The hot water storage type hot water supply heat source device described in Patent Document 1 causes the heat pump device to perform air conditioning operation when there is an air conditioning request, and when the air conditioning target space satisfies the target air conditioning state, the heating operation continues while the heat pump device operates. When the space to be air-conditioned does not satisfy the target air-conditioning state, the air-conditioning operation is performed while continuing the operation of the heat pump apparatus. Thus, the hot water storage type hot water supply heat source apparatus described in Patent Document 1 continues the operation of the heat pump apparatus to improve the efficiency. The air conditioning target space information is transmitted to the hot water supply heat source apparatus by a signal line called a crossover.

Patent No. 4194215 gazette

  By the way, the present inventor proposes a new hot water supply heating system provided with a heat pump section. In the new hot water supply and heating system, for example, a floor heating apparatus is applied as an air conditioning target of the heat pump unit. Thus, the hot water supply and heating system can continue the operation of the heat pump unit while satisfying the target floor heating state, and can improve the efficiency of the heat pump unit.

  However, in the new hot water supply and heating system, it is not the temperature of the room as the space to be heated but the judgment of whether or not the target floor heating state is satisfied (for example, without using crossovers). Based on the temperature of the water after passing through. Then, even when the distance between the outlet of the heating system piping and the thermistor for detecting the temperature of the water after passing through the heating system piping is long, the target heating condition is satisfied. In some cases, it may be determined that the target floor heating condition is not satisfied. That is, there may be a time difference between when the target floor heating condition is actually satisfied and when the hot water supply heating system determines that the target floor heating condition is satisfied. As a result, more than necessary amount of heating water is sent between the outlet of the piping of the heating device and the thermistor that detects the temperature of water after passing through the piping of the heating device. Therefore, during the heating operation to heat the water in the hot water storage tank, the heating water remains between the outlet of the piping of the heating device and the thermistor that detects the temperature of the water after passing through the piping of the heating device . Therefore, at least a part of the remaining heating water may be naturally released. This may reduce the efficiency of the hot water supply and heating system. In this regard, a hot water supply and heating system has found new issues.

  The present invention has been made to solve the above-mentioned problems, and suppresses the decrease in efficiency when the heat of water heated by the heating operation of the heat pump section is alternately supplied to the heating device and the tank section. It aims to provide a hot water supply heating system that can

  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 water supplied to the liquid heat exchanger, a heat pump section for circulating heat between the heat medium and the water supplied to the liquid heat exchanger, at least one of the combustion apparatus and the heat pump section; , And a pipe line of a bathtub system for circulating water, a pipe line of a heating system for connecting water and at least one of the combustion apparatus and the heat pump section, and a heating apparatus, the tank section and the above And a controller configured to control operations of a gas boiler and the heat pump, the controller configured to warm the heat of water heated by the heating operation of the heat pump. When the water heated by the heating operation flows through the piping of the heating device and comes out of the piping of the heating device in the case of alternately supplying the apparatus and the tank unit, the water heated by the heating operation The hot water supply heating system is characterized by executing control to switch the operation of supplying heat to the heating device to the operation of supplying the tank unit.

  According to the above configuration, when the control device alternately supplies the heat of the water heated by the heating operation of the heat pump unit to the heating device and the tank unit, the water heated by the heating operation runs the piping of the heating device. When coming out of the piping of the flow heating device, control is performed to switch from the operation of supplying the heat of the water heated by the heating operation to the heating device to the operation of supplying the tank portion. Therefore, it is possible to suppress that more than the necessary amount of water heated by the heating operation of the heat pump section is sent to the heating device and flows out to the piping other than the piping of the heating device. Therefore, it can suppress that heating water remains in piping other than piping of a heating apparatus during the operation | movement in which the heat of the heating water by heating operation of a heat pump part is supplied to a tank part. Therefore, in piping other than piping of a heating apparatus, it can suppress that the heating water by heating operation of a heat pump part radiates naturally. Thereby, it can suppress that the efficiency of a hot-water supply heating system falls.

  Preferably, the gas boiler further includes a thermistor for detecting the temperature of water after coming out of the piping of the heating device, and the control device is configured to detect the temperature detected by the thermistor at a temperature higher than a target temperature. When the temperature continues to rise, the control of the operation of alternately supplying the heat of the water heated by the heating operation to the heating device and the tank portion is executed.

  According to the configuration, when the detected temperature of the thermistor for detecting the temperature of the water after coming out of the piping of the heating device continues to rise at a temperature higher than the target temperature, the control device controls the water heated by the heating operation Control the operation of alternately supplying the heat of the heating unit and the tank unit. Thereby, the target heating state can be satisfied in the heating symmetric space while maintaining the heat efficiency of the heat pump section.

  Preferably, the tank unit further includes a plate heat exchanger for performing heat exchange between the water provided on the surface of the tank and supplied and the water inside the tank, and the water inside the tank is It heats with the water supplied to the said plate heat exchanger from the said heat pump part, It is characterized by the above-mentioned.

  According to the above configuration, the water inside the tank is heated by the water supplied from the heat pump unit to the plate heat exchanger. Therefore, the heat of the water heated by the heating operation can be transferred to the plate heat exchanger of the tank portion, and the water inside the tank can be easily heated using the plate heat exchanger. Thereby, the efficiency of the hot water supply heating system can be improved.

  According to the present invention, it is possible to provide a hot water supply heating system capable of suppressing a decrease in efficiency when alternately supplying the heat of water heated by the heating operation of the heat pump unit to the heating device and the tank unit. it can.

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 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 length of piping of low-temperature heating equipment and its peripheral area. It is a graph which illustrates an example of the relationship between the detection temperature of a bath return thermistor, and time. 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 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.

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.

  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.

[Operation example to suppress the decrease in energy efficiency]
Next, referring to FIGS. 19 and 20, in the hot water supply and heating system 2, hot water not used in the heating operation of the tank 101 is prevented from remaining in the region SS of the piping system, and the heat of the hot water of the tank 101 is reduced. An operation example will be described in which the decrease in energy efficiency of the hot water supply and heating system 2 is suppressed by suppressing the release to the outside in the region SS of the piping system during the heating operation. In the present embodiment, the “area SS of the piping system” refers to piping other than the piping 402T inside the low-temperature heating device 402, and starts from the start end 454S of the low-temperature heating return pipe 454. And a cistern outlet pipe 629, a bath return four-way valve 249, a third bath return pipe 625, and a piping area to the plate four-way valve 251.

FIG. 19 and FIG. 20 are diagrams for explaining the low-temperature low-load heating operation of the hot water supply and heating system according to the present embodiment.
As described above with reference to FIGS. 15 and 16, the control device 70 according to the present embodiment operates the low-temperature heating device 402 using the heat pump unit 30 to heat the room (including the floor surface). Control can be performed. For example, if the insulation performance of the room is relatively high, the temperature detected by the bath return thermistor 254 for detecting the temperature of water after coming out of the pipe 402T inside the low-temperature heating device 402 is higher than the target temperature. It may keep rising. Then, as shown in FIG. 19 and FIG. 20, the control device 70 switches the bath return four-way valve 249 and the plate four-way valve 251 instead of controlling the operation start / stop of the heat pump unit 30, thereby The water heated in the exchanger 301 is led to the plate heat exchanger 103. That is, the control device 70 alternately supplies the heat of the water heated by the heating operation of the heat pump unit 30 (water heated by the first liquid heat exchanger 301) to the low-temperature heating device 402 and the tank unit 10 Execute control.

  Specifically, during execution of low-temperature low-load heating in which hot water heated by the heating operation of the heat pump unit 30 is sent to the low-temperature heating device 402, the following state may occur. That is, in the case where the space to be heated of the low-temperature heating device 402 is, for example, a narrow space (such as a washroom), when the temperature of the space to be heated rises and reaches the target heating temperature, the necessary heat required by the low-temperature heating device 402 It may be smaller.

  As described above, when the control unit 70 stops the heating operation of the heat pump unit 30 when the amount of heat required by the low-temperature heating device 402 decreases, the heat efficiency and the operation efficiency of the heat pump unit 30 decrease.

  Therefore, as shown in FIGS. 19 and 20, the control device 70 switches the bath return four-way valve 249 and the plate four-way valve 251 and the heat pump unit 30 sends hot water to the low-temperature heating device 402. The heat of the hot water to be made is switched to the state of being transferred to the water in the tank 101.

  As a result, as shown in FIG. 20, the hot water from the inner pipe 352 of the first liquid heat exchanger 301 is the heat pump outlet three-way valve 244, the first heating return pipe 617, and the second heating return pipe. It is sent to the plate heat exchanger 103 via the 635, the fourth heating forward pipe 637, the bath forward four-way valve 245, the tank forward pipe 638, and the heat recovery circulation path 613. Thereby, the heat of the hot water delivered from the inner pipe 352 of the first liquid heat exchanger 301 is transferred to the water in the tank 101 via the plate heat exchanger 103.

  By alternately repeating the state shown in FIG. 19 and the state shown in FIG. 20 described above, the control device 70 increases the thermal efficiency of the heat pump unit 30 so that the heat pump unit 30 can always perform heating operation with full power. 30 operating efficiency is improved.

  Note that the controller 70 executes control to open the solenoid valve 264, the low-temperature capability switching valve 263, and the overflow valve 239 when performing the operations shown in FIGS. 19 and 20. 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. 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.

  By the way, in the hot water supply and heating system 2 according to the present embodiment, it is not the temperature of the heating symmetric space but the bath return thermistor 254 whether the target heating state is satisfied in the space to be heated (for example, a washroom). Based on the detected temperature of In this case, although the target heating condition is satisfied, it may be determined that the target heating condition is not satisfied. That is, there may be a time difference between when the target heating condition is actually satisfied and when the control device 70 determines that the target heating condition is satisfied. Then, an excessive amount of heating water may be sent to the low temperature heating device 402 and the region SS of the piping system. Therefore, heating water may remain in the area SS of the piping system when the control device 70 executes control for guiding the water heated in the first liquid heat exchanger 301 to the plate heat exchanger 103. . Therefore, at least a portion of the heating water remaining in the region SS of the piping system may be naturally released. Thereby, when the control device 70 executes control to repeat alternately the state shown in FIG. 19 and the state shown in FIG. 20 as it is, a new problem is found that the efficiency of the hot water supply heating system 2 may decrease. The

  On the other hand, the control device 70 of the hot water heating system 2 according to the present embodiment monitors the temperature of the hot water at the start end 454S of the low temperature heating return pipe 454 on the outlet side of the low temperature heating device 402 20, a piping system for supplying the heat of water heated by the heating operation of the heat pump unit 30 to the water in the tank 101 from the piping system for low-temperature low-load heating operation (see FIG. 19) for supplying low-temperature heating device 402 (FIG. 20) Execute control to switch to That is, when the control device 70 alternately supplies the heat of the water heated by the heating operation of the heat pump unit 30 to the low temperature heating device 402 and the tank unit 10, the water heated by the heating operation of the heat pump unit 30 is The operation of supplying the heat of water heated by the heating operation of the heat pump unit 30 to the low-temperature heating device 402 when flowing through the piping 402T inside the low-temperature heating device 402 and coming out of the piping 402T inside the low-temperature heating device 402 ( Control to switch from the operation (see FIG. 20) to the supply to the tank unit 10 is executed.

  According to the hot water supply and heating system 2 according to the present embodiment, more than the necessary amount of water heated by the heating operation of the heat pump unit 30 is sent to the low temperature heating device 402 and piping other than the piping 402T inside the low temperature heating device 402 It can suppress flowing out to (area SS of piping system). Therefore, heating water remains in piping (area SS of piping system) other than piping 402T inside low-temperature heating device 402 while heat of heating water by heating operation of heat pump unit 30 is supplied to tank unit 10 You can suppress that. Therefore, in piping (area SS of piping system) other than piping 402T inside low-temperature heating device 402, it can be suppressed that heating water by heating operation of heat pump unit 30 naturally dissipates. Thereby, it can suppress that the efficiency of hot-water supply heating system 2 falls.

  Further, as described above, when the temperature detected by the bath return thermistor 254 continues to rise at a temperature higher than the target temperature, the control device 70 causes the heat of the water heated by the heating operation of the heat pump unit 30 to be reduced by the low temperature heating device 402. Control to supply alternately to the tank unit 10 and the tank unit 10 is executed. Thereby, the target heating state can be satisfied in the heating symmetric space while maintaining the heat efficiency of the heat pump section.

  Furthermore, in the hot water supply and heating system 2 according to the present embodiment, the water inside the tank 101 is heated by the water supplied from the heat pump unit 30 to the plate heat exchanger 103. Therefore, the heat of the water heated by the heating operation of the heat pump unit 30 can be transferred to the plate heat exchanger 103 of the tank unit 10, and the water inside the tank 101 can be easily heated using the plate heat exchanger 103. it can. Thereby, the efficiency of the hot water supply heating system 2 can be improved.

Next, an operation of switching the state in which the control device 70 supplies the heat of water heated by the heating operation of the heat pump unit 30 to the low temperature heating device 402 to the state in which the heat is supplied to the tank unit 10 will be further described with reference to the drawings. .
FIG. 21 is a view for explaining the low-temperature heating device and the length of piping in the peripheral region thereof.
FIG. 22 is a graph illustrating an example of the relationship between the temperature detected by the bath return thermistor and time.

  As shown in FIG. 21, the pipe length of the pipe 402 </ b> T in the low-temperature heating device 402 is indicated by “Y”. The pipe length from the low-temperature going thermal valve 241 to the liquid merging portion 405 through the low-temperature heating incoming pipe 453, the pipe 402T in the low-temperature heating device 402, and the low-temperature heating return pipe 454 is “X”. It shows by.

Therefore, the pipe length from the low-temperature forward thermal valve 241 to the start end 454S of the low-temperature heating return pipe 454 which is the outlet of the low-temperature heating device 402 is indicated by “L”. The piping length L can be expressed by the following equation.
L = (X-Y) / 2 + Y

  When control device 70 starts control of the low-temperature low-load heating operation shown in FIG. 19 at time t0 in FIG. 22, the detected temperature of bath return thermistor 254 is, for example, 80 ° C. as temperature curve K shown in FIG. Will rise towards the Subsequently, the low-temperature forward heat valve 241 starts operating from the closed state due to the temperature of the hot water at time t1 in FIG. 22, and becomes open at time t2. The control device 70 can determine that the low-temperature going thermal valve 241 has been opened based on power consumption.

  When the low temperature forward thermal valve 241 is in the open state, the hot water starts to pass through the pipe 402T of the low temperature heating device 402. When hot water passes through the piping 402T of the low temperature heater 402, the heat of the hot water is released. Therefore, the temperature curve K (K1, K2) of the hot water drops rapidly from time t2 to time t3.

  At time t3, the temperature curve K (K1, K2) is kept constant (substantially horizontal). Then, when time passes from time t3 to time t4, the low-temperature heating device 402 heats the space to be heated, whereby the amount of heat release from the pipe 402T of the low-temperature heating device 402 decreases. Therefore, the temperature curve K (K3, K4) of the hot water rises again.

  The temperature curve K1 indicated by an alternate long and short dash line between time t2 and time t3 indicates a case where the length of the pipe 402T of the low temperature heating device 402 is relatively long, and the temperature curve K2 indicated by a solid line is low temperature heating The case where the length of the pipe 402T of the device 402 is relatively short is shown. The angle θ1 at the time of temperature decrease when the length of the pipe 402T of the low temperature heating device 402 is relatively long is greater than the angle θ2 at the time of temperature decrease when the length of the pipe 402T of the low temperature heating device 402 is relatively short. small. That is, the rate of change of temperature (rate of decrease) when the length of the pipe 402T of the low temperature heating device 402 is relatively long between the time t2 and the time t3 is the same as that of the pipe 402T of the low temperature heating device 402. Lower than the rate of change in temperature (rate of decrease) when the length is relatively short.

  The temperature curve K3 indicated by the alternate long and short dash line between time t3 and time t4 indicates that the length of the pipe 402T of the low-temperature heating device 402 is relatively long, and the temperature curve K4 indicated by the solid line is The case where the length of the pipe 402T of the low-temperature heating device 402 is relatively short is shown. The angle θ3 at the time of temperature rise when the length of the pipe 402T of the low temperature heating device 402 is relatively long is greater than the angle θ4 at the temperature rise when the length of the pipe 402T of the low temperature heating device 402 is relatively short. small. That is, the rate of change of temperature (rate of increase) when the length of the pipe 402T of the low temperature heating device 402 is relatively long between the time t3 and the time t4 is the same as that of the pipe 402T of the low temperature heating device 402. Lower than the rate of change in temperature (rate of increase) when the length is relatively short.

  As described above, if the length of the pipe 402T of the low-temperature heating device 402 is relatively long, the temperature decrease and the temperature increase indicated by the temperature curve K (K1, K2, K3, K4) are relatively gentle. On the other hand, if the length of the pipe 402T of the low-temperature heating device 402 is relatively short, the temperature decrease and the temperature increase indicated by the temperature curve K (K1, K2, K3, K4) are relatively rapid.

  Here, the length of the piping system of the low-temperature low-load heating operation will be described. First, from the outlet position of the inner pipe 352 of the first liquid heat exchanger 301, the first heating return pipe 617, the second heating return pipe 635, the third heating return pipe 636, and the low temperature return heating valve 241 are obtained. The piping length M up to (see FIG. 21) is a preset inherent piping length in the hot water supply and heating system 2 and is known in design.

Also, from the outlet position of the liquid merging portion 405, the heating return pipe 628, the cistern 237, the cistern outlet pipe 629, the bath return four-way valve 249, the third bath return pipe 625, the plate four-way valve 251, the bath pump inlet pipe 626, the bath The piping length N up to the inlet side of the pump 235, the bath pump outlet pipe 614, the inlet pipe 615 of the first liquid heat exchanger 301, and the inner pipe 352 of the first liquid heat exchanger 301 (see FIG. 21) Likewise, similarly, it is a preset inherent pipe length in the hot water heating system 2, and is known in design.
On the other hand, the size of the low-temperature heating device 402 shown in FIG. 21 changes according to the size of the space to be heated, such as a room where the low-temperature heating device 402 is installed. That is, low-temperature heating devices 402 of a plurality of sizes are prepared, and the length of the pipe 402T is set to be large or small.

  The angles (.theta.1, .theta.2, .theta.3, .theta.4) of the temperature curve K (K1, K2, K3, K4) shown in FIG. 22 indicate that the hot water has the above-mentioned piping length M shown in FIG. It is equivalent to the flow resistance value generated when flowing through the piping system that is the sum of the piping length L from the valve 241 to the starting end 454S of the low temperature heating return pipe 454 which is the outlet of the low temperature heating device 402 and the piping length N. is there. Each of the pipe length M and the pipe length N is a constant value and known in design.

  Therefore, depending on the size of the pipe length L (the size of the low-temperature heating device 402) from the low-temperature going thermal valve 241 to the start end 454S of the low-temperature heating return pipe 454 which is the outlet of the low-temperature heating device 402 The angles (θ1, θ2, θ3, θ4) of K (K1, K2, K3, K4) change. The control device 70 can calculate the length of the pipe 402T in the low-temperature heating device 402 by detecting the flow resistance value.

  For this reason, when one kind of low-temperature heating device 402 of a plurality of kinds is installed according to the size of the space to be heated, the control device 70 sets angles (θ3, θ4) at the time of temperature It is possible to determine which size of the low-temperature heating device 402 is installed by calculating) and the angle (θ1, θ2) at the time of temperature decrease.

Next, an example of a method of measuring the piping distance performed by the control device 70 at the time of trial operation of the hot water supply and heating system 2 will be described.
The control device 70 operates the low temperature-traveling thermal valve 241 by energizing it once to put the low-temperature-traveling thermal valve 241 in a preheated state (pre-warmed state). At the time of trial operation of the hot water supply heating system 2, the control device 70 starts driving the bath pump 235, sets the low temperature capacity switching valve 263 in an open state, and the first burner 203 and the second burner 204 of the combustion device 201. Start burning. As exemplified in FIG. 22, since hot water passes through the low-temperature capability switching valve 263 before the control device 70 energizes the low-temperature forward heat valve 241 at time t1 and opens the low-temperature forward heat valve 241. The temperature that the bath return thermistor 254 measures continues to rise.

  Then, at time t2 in FIG. 22, when the low-temperature going thermal valve 241 is opened, hot water passes through the pipe 402T of the low-temperature heating device 402. Therefore, the hot water is dissipated by passing through the pipe 402 T of the low-temperature heating device 402. Therefore, the control device 70 tries to maintain the rotational speed of the bath pump 235, and the power consumption of the bath pump 235 is increased. Moreover, since the temperature of the hot water which comes out of piping 402T of the low temperature heating apparatus 402 falls so that it may illustrate at the time of time t3 from the time of time t2 of FIG. 22, the temperature which the bath return thermistor 254 measures falls. Control device 70 uses the timer in control device 70 to start time measurement from time t2 in FIG.

  The control device 70 receives the signal of the number of rotations of the bath pump 235 and the signal of the power consumption of the bath pump 235, and switches the low temperature capability based on the number of rotations of the bath pump 235 and the power consumption of the bath pump 235 The total flow rate of the hot water flowing through the piping system (pipeline route) passing through the valve 263 and the piping system (pipeline route) passing through the low-temperature forward thermal valve 241 can be grasped.

  The flow rate of the hot water flowing through the piping system (pipeline route) passing through the low temperature capacity switching valve 263 is an appliance specific value of the hot water heating system 2 and is known. Alternatively, the piping resistance of the hot water flowing in the piping system (pipeline route) passing through the low-temperature capacity switching valve 263 is an appliance specific value of the hot water heating system 2 and is known. For this reason, the control device 70 can grasp the flow rate ratio from the degree (fall rate) of the drop in temperature when the temperature of the hot water measured by the bath return thermistor 254 falls. That is, since the pipe resistance is higher as the angle (θ1, θ2) is an obtuse angle, the control device 70 can grasp the flow rate ratio from the angle. Therefore, the control device 70 can grasp the piping resistance (flow rate) of the piping system (piping route) through which the hot water passes through the low-temperature going thermal valve 241.

  The specification of the pipe 402T in the low-temperature heating device 402 is, for example, 5A (outside diameter 8 mm, inside diameter 4.8 mm, flow rate in the pipe 18 cc / m). Further, a heat sink such as aluminum foil is attached to the pipe 402T of the pipe standard 5A. The specifications of piping connected to the low-temperature heating device 402 are, for example, 7A (outside diameter 10 mm, inside diameter 6.8 mm, flow rate in piping 36 cc / m) or 10A (outside diameter 10 mm, inside diameter 9.8 mm, piping The internal flow rate is 75 cc / m). Hot and cold water flows through the piping of piping standard 13A up to the low-temperature heating device 402.

As shown in FIG. 22, the timer of the control device 70 measures the time from time t2. In addition, the temperature rises until a time further from the time t3 elapses and reaches the time t4 after the predetermined time.
The degree of increase (rise rate) of the temperature is obtuse as the pipe distance (length) Y of the pipe 402T of the pipe standard 5A in the low-temperature heating apparatus 402 shown in FIG. 22 is longer. For this reason, the control device 70 performs a predetermined time (a pipe volume of the pipe standard 5A and the pipe standard 7A or 10A) and a pipe volume from the starting end 454S of the low-temperature heating return pipe 454 as a return port of the appliance to the bath return thermistor 254 The piping distance of the piping standard 7A or 10A can be obtained based on (the unique value of the hot water supply heating system 2) and the degree of the rise in temperature described above. In addition, determination of whether the specification of piping is 7 A or 10 A may be performed using the characteristic (rotation speed-power consumption-flow rate characteristic) of the bath pump 235 confirmed previously.

  Next, referring to FIG. 19 and FIG. 20, an operation example in which the heat pump unit 30 transfers hot water to the low-temperature heating device 402, and switches the heat of hot water generated by the heat pump unit 30 to water in the tank 101. Explain.

  As shown in FIG. 19, in the case where the heat pump unit 30 is used as a heat source unit to supply hot water to the low-temperature heating device 402 to perform low-temperature floor heating, the inner pipe of the first liquid heat exchanger 301 The water flowing through 352 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 heated by the first liquid heat exchanger 301 is about 45.degree. Then, the heat pump outlet three-way valve 244 which is a switching valve of the circuit is switched, and hot water from the inner pipe 352 of the first liquid heat exchanger 301 is sent to the first heating forward pipe 617 side.

  The hot water heated by the first liquid heat exchanger 301 is supplied from the first heating return pipe 617 to the second heating return pipe 635, the third heating return pipe 636, and the low temperature return heating valve 241. And the low temperature heating forward pipe 453 to the low temperature heating device 402. The hot water passes through the pipe 402T in the low-temperature heating device 402 and is led to the low-temperature heating return pipe 454, the liquid junction portion 405, the heating return pipe 628, the cistern 237, and the cistern outlet pipe 629. The temperature of water coming out of the pipe 402T in the low-temperature heating device 402 is about 30 ° C. or so. The water flowing out of the cistern 237 is a cistern outlet pipe 629, a bath return four-way valve 249, a third bath return pipe 625, a plate four-way valve 251, a bath pump inlet pipe 626, and a bath pump 235; It returns to the inner pipe 352 of the first liquid heat exchanger 301 via the bath pump outlet pipe 614 and the inlet pipe 615 of the first liquid heat exchanger 301.

  As described above, the control device 70 can warm the space to be heated by generating low-temperature low-load heating that generates hot water by the heating operation of the heat pump unit 30 and sends the hot water to the low-temperature heating device 402. When the space to be heated is warmed, the amount of heat required by the low-temperature heating device 402 is reduced, so that the heat pump unit 30 may have extra capacity in the ability to make hot water. In this case, the temperature detected by the bath return thermistor 254 continues to rise at a temperature higher than the target temperature. At this time, when the control device 70 stops the heating operation of the heat pump unit 30, the thermal efficiency and the operating efficiency of the heat pump unit 30 decrease.

  Therefore, the control device 70 of the present embodiment sends heat of the water heated by the heating operation of the heat pump unit 30 to the low temperature heating device 402 (see FIG. 19), the heat of the water heated by the heating operation of the heat pump unit 30. To the water in the tank 101 (see FIG. 20). Then, after a predetermined time has elapsed, the control device 70 returns the water heated by the heating operation of the heat pump unit 30 back to the low temperature heating device 402 (see FIG. 19). Thereby, the control device 70 alternately supplies the heat of the water heated by the heating operation of the heat pump unit 30 (the water heated by the first liquid heat exchanger 301) to the low temperature heating device 402 and the tank unit 10 Perform low-temperature, low-load heating (floor heating in living rooms such as washrooms).

  At this time, as described above with reference to FIGS. 21 and 22, the control device 70 grasps the piping distance. Therefore, the control device 70 preferably measures the temperature of hot water from one end (inlet portion) to the other end (outlet portion) of the pipe 402T of the low-temperature heating device 402. If the temperature of the hot water is high, the control device 70 determines that there is a high possibility that, for example, other types of heating devices are used in combination in the room where the low-temperature heating device 402 is installed. Conversely, when the temperature of the hot water is low, for example, the control device 70 determines that the door of the living room is opened and the temperature of the living room is decreasing.

  Thus, control device 70 changes the predetermined time for alternately switching between the state shown in FIG. 19 and the state shown in FIG. 20 by monitoring the temperature of hot water passing through pipe 402T in low-temperature heating device 402. can do. Furthermore, the control device 70 sends hot water to the piping 402T of the low temperature heating device 402, and the hot water filled in the piping 402T of the low temperature heating device 402 is the beginning portion 454S of the low temperature heating return pipe 454 on the outlet side of the low temperature heating device 402. At the point (timing) when it comes out, the state shown in FIG. 19 is switched to the state shown in FIG. That is, the control device 70 controls the above-mentioned predetermined time (or flow rate) so that the hot water does not go out from the pipe 402T in the low-temperature heating device 402 to the low-temperature heating return pipe 454 which is a pipe returning to the appliance.

  As a result, more than the necessary amount of water heated by the heating operation of the heat pump unit 30 is sent to the low-temperature heating device 402 and flows out to piping (region SS of the piping system) other than the piping 402T inside the low-temperature heating device 402 Can be reduced. Therefore, heating water remains in piping (area SS of piping system) other than piping 402T inside low-temperature heating device 402 while heat of heating water by heating operation of heat pump unit 30 is supplied to tank unit 10 You can suppress that. Therefore, in piping (area SS of piping system) other than piping 402T inside low-temperature heating device 402, it can be suppressed that heating water by heating operation of heat pump unit 30 naturally dissipates. Thereby, it can suppress that the efficiency of hot-water supply heating system 2 falls.

  In this case, if the time from the introduction of hot water to the low-temperature heating device 402 to the time when it comes out from the start end 454S of the low-temperature heating return pipe 454 on the outlet side of the pipe 402T is, for example, 58 seconds, the control device 70 The predetermined time described above can be fixed at 58 seconds. On the other hand, the control device 70 can also change the time ratio between the time of sending hot water to the low temperature heating device 402 and the time of heating the water of the tank 101.

  For example, as illustrated in FIG. 21, the control device 70 sends hot water to the tank 101 side if the time from the introduction of hot water to the low-temperature heating device 402 to the time it comes out from the start end 454S is 3 minutes. If the time (predetermined time) is 4 minutes, or if the time from the introduction of hot water to the heating / heating device 402 to the time it comes out from the start end 454S is 2 minutes, the time for sending hot water to the tank 101 (predetermined time ) It can be done for 4 minutes. Alternatively, if the time from the introduction of the hot water to the low-temperature heating device 402 to the time it comes out from the start end 454S is fixed for 58 seconds, the control device 70 sends the hot water to the tank 101 (predetermined time) It can be 2 minutes, 3 minutes, or 4 minutes.

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. 23 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. 23, the hot water supply and heating system 2A according to the present embodiment includes a tank unit 10A, a gas boiler 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. 23, when the recovery pump 236 is driven, the 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. 23, the makeup water solenoid valve 276 adjusts the opening 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. 23, 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. 23, 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 A 28 and A 29 shown in FIG. 23, 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. 23, the outlet pipe 355 of the second liquid heat exchanger 302 is connected to the collection 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. 24 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. 24 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. 24, 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 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 an arrow A34 shown in FIG. 24, 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. 25 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. 25 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. 26 and FIG. 27 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. The filled portions shown in FIG. 26 represent pipelines through which water flows in the operation of discharging the drain stored in the drain tank 233. The filled portions shown in FIG. 27 represent pipelines through which water flows in the operation of flushing the pipelines.

  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. 26, 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. 27, 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 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. 28 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. 28 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 storage 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. 29 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. 29 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. 29 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.

  As indicated by an 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 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 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. 29, 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 shown by an arrow A35 shown in FIG. 29, 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 apparatus 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. 29, 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. 30 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 portion shown in FIG. 30 represents a pipeline 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. 28 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.

  As indicated by an arrow A36 shown in FIG. 30, 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. 30, 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 arrow A38 in FIG. 30, 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. 30, 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. 31 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 reheating operation described above with reference to FIG. 30, while the water introduced from the bath 50 is heated using the gas boiler 20A, in the second reheating 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. Filled portions shown in FIG. 31 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.

  As indicated by an arrow A36 shown in FIG. 31, when the recovery pump 236 is driven, 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 the 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 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. 31, 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 A26 and A27 shown in FIG. 31, the water flowing through the first water supply connection pipe 667 is guided 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. 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 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. 32 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. 32, the heat introduced from the bathtub 50 is heated using the heat pump unit 30. Filled portions shown in FIG. 32 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. 28 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. 32 is a so-called heat retaining 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, for example, when the degree of temperature decrease is large as in winter, 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. 32, when the heating pump 275 is driven, 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 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 arrow A34 shown in FIG. 32, 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. 32, 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. 32, 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. 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. 32, the water flowing through the first inner pipe 656 of the bath heat exchanger 207A is guided to the connection pipe 655 of the bath heat exchanger 207A. As indicated by arrows A26 and A27 shown in FIG. 32, the water flowing through the connection pipe 655 of the bath heat exchanger 207A is led to the second recovery pump inlet pipe 666 via the recovery switching four-way valve 285. 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 as indicated by the arrow A 36 shown in FIG. 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]
FIG. 33 and FIG. 34 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. 33 represent pipelines through which water flows in the bath water heat heat pump recovery operation. Filled portions shown in FIG. 34 represent pipelines through which water flows when the hot water supply operation is interrupted during 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. 33, 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 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. 33, 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. 33, 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. 33, 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. 33, 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. 33, 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. 33, the water flowing through the connection pipe 655 of the bath heat exchanger 207A is led to the second recovery pump inlet pipe 666 via the recovery switching four-way valve 285. As indicated by an arrow A 28 shown in FIG. 33, 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. 34, the controller 70 performs 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. 34, 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. 33, as indicated by arrow A43, the water heated in the second liquid heat exchanger 302 flows through the recovery pump outlet pipe 659 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. 35 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. 35 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. 35, when the bath pump 235 is driven, the water in the bath 50 is supplied to 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. 35, the water flowing through the first recovery pump inlet pipe 658 is pumped 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. 35, 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. 35, 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 guided 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. 36 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. 36 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.

  When the recovery pump 236 is driven as shown by an arrow A36 shown 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.

  Since the hot water control valve 117 is open as indicated by an arrow A35 shown in FIG. 36, 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, when the heating pump 275 is driven, water in 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, as indicated by an arrow A33 shown in FIG. 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. 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.

  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]
37 and 38 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. 37 and 38 represent pipelines through which water flows in the low-temperature low-load heating operation.

  As described above with reference to FIG. 36, 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. 37, 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. 37, when the heating pump 275 is driven, the water inside the cistern 237 flows through the cistern outlet pipe 629 and is delivered 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. 38, 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 through 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. 38, 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. 39 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. 39 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, when the heating pump 275 is driven, water in 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, as indicated by an arrow A33 shown in FIG. 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. 40 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. 40 is an operation of operating the high-temperature heating device 401 to heat a 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. 40 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, when the heating pump 275 is driven, water in 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, as indicated by an arrow A33 shown in FIG. 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.

[Operation example to suppress the decrease in energy efficiency]
Next, referring to FIGS. 41 and 42, in the hot water supply and heating system 2A, the hot water not used in the heating operation of the tank 101 is prevented from remaining in the region SS of the piping system, and the heat of the hot water is An operation example will be described in which the decrease in energy efficiency of the hot water supply heating system 2A is suppressed by suppressing the release to the outside in the region SS of the piping system during the heating operation. In the present embodiment, the “area SS of the piping system” refers to piping other than the piping 402T inside the low-temperature heating device 402, and starts from the start end 454S of the low-temperature heating return pipe 454. And the piping to the cistern outlet pipe 629 and the inlet pipe 615 of the first liquid heat exchanger 301.

FIG. 41 and FIG. 42 are diagrams for explaining the low-temperature low-load heating operation of the hot water supply and heating system according to the present embodiment.
As described above with reference to FIGS. 37 and 38, the control device 70 according to the present embodiment operates the low-temperature heating device 402 using the heat pump unit 30 to heat the room (including the floor surface). Control can be performed. 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. That is, the temperature of water after coming out of piping 402T inside low-temperature heating device 402 may continue to rise at a temperature higher than the target temperature. Then, as shown in FIG. 41 and FIG. 42, 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 from 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 the third liquid heat exchanger via the feed water switching three-way valve 277 It is led to the connection pipe 651 of 272. 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. Water flowing through the first recovery pump inlet tube 658 is pumped by recovery pump 236 to recovery pump outlet tube 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. Further, the control device 70 switches between the operation start and the operation stop of the recovery pump 236. That is, the control device 70 alternately supplies the low-temperature heating device 402 and the tank unit 10A with the heat of the water (water heated by the first liquid heat exchanger 301) heated by the heating operation of the heat pump unit 30. Execute control.

  Specifically, during execution of low-temperature low-load heating in which hot water heated by the heating operation of the heat pump unit 30 is sent to the low-temperature heating device 402, the following state may occur. That is, in the case where the space to be heated of the low-temperature heating device 402 is, for example, a narrow space (such as a washroom), when the temperature of the space to be heated rises and reaches the target heating temperature, the necessary heat required by the low-temperature heating device 402 It may be smaller.

  In such a case, when the control device 70 stops the heating operation of the heat pump unit 30, the thermal efficiency and the operating efficiency of the heat pump unit 30 decrease.

Therefore, as shown in FIG. 41 and FIG. 42, the control device 70 switches the heat pump outlet three-way valve 244A and switches the start and stop of the operation of the recovery pump 236. From the feeding state, the heat of the hot water generated by the heat pump unit 30 is transferred to the water in the tank 101 using the third liquid heat exchanger 272.
As shown in FIG. 42, when the heating pump 275 is driven, water in the cistern 237 flows through the cistern outlet pipe 629 and is sent out to the heating pump outlet pipe 662. The water flowing through the heating pump outlet pipe 662 is heated through the inner pipe 352 of the first liquid heat exchanger 301. The temperature of the water heated by the first liquid heat exchanger 301 is about 45 ° C., for example.

In FIG. 42, the control device 70 switches the heat pump outlet three-way valve 244A which is a switching valve of the circuit. Therefore, the hot water coming out of the inner pipe 352 of the first liquid heat exchanger 301 is not the first heating forward pipe 617 but the third of the third liquid heat exchanger 272 via the heat pump outlet three-way valve 244A. It flows through the inner pipe 654 of two.
Thus, the hot water passing through the second inner pipe 654 heats the water passing through the first inner pipe 652 by supplying heat to the water passing through the first inner pipe 652. That is, the temperature of water passing through the second inner pipe 654 decreases, and the temperature of water passing through the first inner pipe 652 rises.
The temperature-reduced hot water flows from the second inner pipe 654, the first low-temperature capacity pipe 632, the cistern 237, the cistern outlet pipe 629, the heating pump 275, and the inlet pipe 615 to the first liquid. It returns to the inner pipe 352 of the heat exchanger 301.

On the other hand, in FIG. 42, 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 into the tank 101.
The water in the tank 101 is collected from the lower part of the tank 101, the third liquid heat exchanger 272 via the switching four-way valve 285, the first water supply connection pipe 667, the water supply switching three-way valve 277, and the connection pipe 651. Leading to the first inner pipe 652 of FIG.

  Again, the hot water passing through the second inner pipe 654 of the third liquid heat exchanger 272 supplies heat to the water passing through the first inner pipe 652 of the third liquid heat exchanger 272, thereby The water passing through the inner pipe 652 is heated. That is, the temperature of water passing through the second inner pipe 654 decreases, and the temperature of water passing through the first inner pipe 652 rises. The temperature of the water heated by the third liquid heat exchanger 272 and emitted from the first inner pipe 652 is about 45 ° C., for example. On the other hand, the temperature of the water which came out of the 2nd inner pipe 654 of the 3rd liquid heat exchanger 272 is about 30 ° C, for example.

  The water heated by passing through the first inner pipe 652 of the third liquid heat exchanger 272 is supplied to the intermediate pipe 653, the first recovery pump inlet pipe 658, the recovery pump 236, and the third recovery three-way It is led into the tank 101 via the valve 284 and the recovery pump outlet pipe 659. In this manner, the remaining excess heat generated during the heating operation of the heat pump unit 30 is supplied to the water in the tank 101 via the third liquid heat exchanger 272. The temperature of the water introduced into the tank 101 is, for example, about 45.degree. Thereby, the water in the tank 101 can be heated.

Next, referring to FIGS. 41 and 42, the heat pump unit 30 transfers hot water to the low-temperature heating device 402 to switch the heat of the hot water produced by the heat pump unit 30 to the water in the tank 101. An example of the time point (timing) will be described.
As described above, the control device or 70 performs heating operation of the heat pump unit 30 to generate hot water and sends low temperature heating device 402 to send the hot water to the low temperature heating device 402 to warm the space to be heated. it can. As the heating symmetric space warms up, the amount of heat required by the low-temperature heating device 402 decreases. For this reason, the heat pump unit 30 may have extra capacity in the ability to make hot water. At this time, when the control device 70 stops the heating operation of the heat pump unit 30, the thermal efficiency and the operating efficiency of the heat pump unit 30 decrease.

  Therefore, the control device 70 according to the present embodiment sends water heated by the heating operation of the heat pump unit 30 to the low-temperature heating device 402 (Fig. 41 production award), the water heated by the heating operation of the heat pump unit 30. The heat is transferred to the water in the tank 101 (see FIG. 42). Then, after a predetermined time has elapsed, the control device 70 returns the water heated by the heating operation of the heat pump unit 30 back to the low temperature heating device 402 (see FIG. 41). Thereby, the control device 70 alternately supplies the heat of the water heated by the heating operation of the heat pump unit 30 (the water heated by the first liquid heat exchanger 301) to the low temperature heating device 402 and the tank unit 10A. Perform low-temperature, low-load heating (floor heating in living rooms such as washrooms).

  If the control device 70 reduces the rotational speed of the heating pump 275, the amount of heat of hot water sent to the low-temperature heating device 402 is reduced. If the control device 70 increases the rotational speed of the recovery pump 236, the amount of heat that can be transferred to the water in the tank 101 increases. As described above, the control device 70 changes the ratio of the number of revolutions of the heating pump 275 to the number of revolutions of the recovery pump 236 and the number of revolutions of the collection pump 236 to change the ratio. The sending operation and the operation of transferring the heat of the hot water remaining when the heat pump unit 30 has surplus power to the water in the tank 101 can be performed independently. Therefore, in the hot water supply and heating system 2A of the second embodiment, unlike the hot water supply and heating system 2 of the first embodiment, the heat pump section does not alternately repeat the state shown in FIG. 41 and the state shown in FIG. The reduction of the efficiency of 30 is suppressed.

  However, the control device 70 can not set the number of rotations of the heating pump 275 and the number of rotations of the collection pump 236 to a predetermined number or less. Further, the heating pump 275 and the recovery pump 236 may be in a state of consuming power (ineffective rotation state) although the flow rate of hot water is zero. Therefore, when the number of rotations of heating pump 275 and the number of rotations of recovery pump 236 decrease to a predetermined predetermined number of rotations, control device 70 according to the present embodiment performs the state shown in FIG. Drive alternately.

  As described above, when the control device 70 executes control of operation in which the state shown in FIG. 41 and the state shown in FIG. 42 are alternately repeated, the hot water sent out from the inner pipe 352 of the first liquid heat exchanger 301 is There is a risk of remaining in the area SS of the piping system.

  Therefore, the control device 70 prevents the hot water heated by the heating operation of the heat pump unit 30 from coming out from the piping 402T of the low-temperature heating device 402 to the low-temperature heating return pipe 454 which is piping returning to the appliance. Control time (or flow rate). That is, when the control device 70 alternately supplies the heat of the water heated by the heating operation of the heat pump unit 30 to the low temperature heating device 402 and the tank unit 10A, the water heated by the heating operation of the heat pump unit 30 is An operation of supplying the heat of water heated by the heating operation of the heat pump unit 30 to the low temperature heating device 402 when flowing through the piping 402T of the low temperature heating device 402 and coming out of the piping 402T of the low temperature heating device 402 (see FIG. 41) Control to switch the operation to supply the tank unit 10A (see FIG. 42).

  According to the hot water supply and heating system 2A according to the present embodiment, more than the necessary amount of water heated by the heating operation of the heat pump unit 30 is sent to the low temperature heating device 402 and piping other than the piping 402T inside the low temperature heating device 402 It can suppress flowing out to (area SS of piping system). Therefore, heating water remains in piping (area SS of piping system) other than piping 402T inside low-temperature heating device 402 while heat of heating water by heating operation of heat pump unit 30 is supplied to tank unit 10A. You can suppress that. Therefore, in piping (area SS of piping system) other than piping 402T inside low-temperature heating device 402, it can be suppressed that heating water by heating operation of heat pump unit 30 naturally dissipates. Thereby, it can suppress that the efficiency of hot-water supply heating system 2A falls.

  In addition, as described above, when the temperature of water after coming out of the pipe 402T inside the low-temperature heating device 402 continues to rise at a temperature higher than the target temperature, the control device 70 causes the heating operation of the heat pump unit 30. The control of supplying the heat of the heated water alternately to the low temperature heating device 402 and the tank unit 10A is executed. Thereby, the target heating state can be satisfied in the heating symmetric space while maintaining the heat efficiency of the heat pump unit 30.

  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, 402T · · · piping, 403 · · · heating fan, 404: thermal 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, 454S: beginning part, 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, 6 8 ... inlet pipe, 609 ... outlet pipe, 611 ... 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 Tube, 622 ··· third bath forward 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 forward pipe, 628: heating return pipe, 629: cistern outlet pipe, 631: bathtub bypass pipe, 632: first low-temperature capacity Tube, 633 ... second cold capacity tube, 634 ... third cold capacity · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 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 traveling pipe, 651: connecting 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 forward pipe, 662 · · · heating pump outlet pipe, 663 · · · first heating bypass pipe, 664 · · · Outlet pipe 665: second 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

Claims (3)

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 section having a heat medium circulation path for circulating a heat medium, and performing heat exchange between the heat medium and water supplied to the liquid heat exchanger;
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 which connects at least one of the combustion apparatus and the heat pump section and a heating apparatus to circulate water;
A control device that controls operations of the tank unit, the gas boiling unit, and the heat pump unit;
Equipped with
In the case where the heat of the water heated by the heating operation of the heat pump unit is alternately supplied to the heating device and the tank unit, the control device causes the water heated by the heating operation to connect the piping of the heating device. Flow control is performed to switch from the operation of supplying the heat of the water heated by the heating operation to the heating device to the operation of supplying the tank portion when coming out of the piping of the heating device. Hot water supply heating system. The gas boiler further comprises a thermistor for detecting the temperature of water after coming out of the piping of the heating device,
The control device controls the operation of alternately supplying the heat of the water heated by the heating operation to the heating device and the tank unit when the temperature detected by the thermistor continues to rise at a temperature higher than the target temperature. The hot water supply heating system according to claim 1, characterized in that: The tank unit further includes a plate heat exchanger that exchanges heat between the supplied water provided on the surface of the tank and the water inside the tank,
The hot water heating system according to claim 1 or 2, wherein water in the tank is heated by water supplied from the heat pump section to the plate heat exchanger.

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