JP2019116996A - Hot water supply heating system - Google Patents

Abstract

To provide a hot water supply heating system enabling miniaturization.SOLUTION: A hot water supply heating system 2 comprises: a combustor 201 configured to heat supplied water with combustion of burners 203, 204; a heat pump part 30 having a heat medium circulation passage 351 circulating heat medium, and configured to perform heat exchange between the heat medium and the supplied water; pipe conduits 691, 692, 621, 624 of a bathtub system connecting at least any of the combustor 201 and the heat pump part 30 to a bathtub 50 to circulate water; and pipe conduits 691, 692, 627, 629 of a heating system connecting at least any of the combustor 201 and the heat pump part 30 to a heater 40 to circulate water. The pipe conduits of the bathtub system are connected to the pipe conduits of the heating system.SELECTED DRAWING: Figure 2

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 supply and heating system including a hot water supply system, a heat pump system, and a heating system. The heat pump system of the hot water supply heating system described in Patent Document 1 includes a three-fluid heat exchanger. The three-fluid heat exchanger can perform heat exchange between the heat medium in the heat medium circuit and the water in the tank water circuit. Furthermore, the three-fluid heat exchanger can perform heat exchange between the heat medium in the heat medium circuit and the water in the heating water circuit. That is, the three-fluid heat exchanger functions as a first heat exchanger that heats water in the tank water circulation passage, and a second heat exchanger that heats water in the heating water circulation passage. The tank water circulation passage is provided as a system separate from the heating water circulation passage, and is not connected to the heating water circulation passage.

JP, 2014-16066, A

  However, in the hot water supply heating system described in Patent Document 1, the three-fluid heat exchanger functions as the first heat exchanger and the second heat exchanger, and the heat medium circulation path, the tank water circulation path, and the heat medium circulation path Three circulation paths pass through the three-fluid heat exchanger. Therefore, there is a problem that a hot water supply heating system becomes large. In other words, there is a problem that it is difficult to miniaturize the hot water supply heating system. For example, a hot water supply heating system that can be stored in a pipe shaft provided in an apartment complex or the like in the metropolitan area is desired.

  The present invention was made in order to solve the above-mentioned subject, and an object of the present invention is to provide a hot water supply heating system which can attain miniaturization.

  According to the present invention, the subject has a combustion apparatus for heating supplied water by combustion of a burner, and a heat medium circulation path for circulating a heat medium, and between the heat medium and the supplied water A pipe of a bathtub system that connects a heat pump unit performing heat exchange, at least one of the combustion device and the heat pump unit, and a bathtub and circulates water, at least one of the combustion device and the heat pump unit, and heating A hot water supply and heating system is characterized by comprising: an apparatus; and a pipe of a heating system for connecting water and circulating water; and the pipe of the bathtub system is connected to the pipe of the heating system. .

  According to the above configuration, the pipe line of the bathtub system that connects at least one of the combustion device and the heat pump unit and the bathtub and circulates water connects the heating device and at least one of the combustion device and the heat pump unit. It is connected to the piping of the heating system that circulates water. That is, the pipeline of the bathtub system is not provided as a system separate from the pipeline of the heating system, but is connected to the pipeline of the heating system. Therefore, the heat pump unit can perform heat exchange between the heat medium flowing through the heat medium circulation path and the water flowing through the bathtub system and the pipe line of the heating system. Therefore, compared with the case where the pipe line of the bathtub system is provided as a system separate from the pipe line of the heating system, the heat pump unit can be miniaturized. Thus, the hot water supply heating system can be miniaturized.

  Moreover, not only the combustion apparatus which heats water by combustion of a burner but the heat pump part which heat-exchanges between a heat carrier and water can be used, and the water which flows through the pipe line of a heating system can be heated. Therefore, it is possible to heat the water flowing through the piping of the heating system with relatively high energy efficiency. That is, the energy efficiency of the heating device can be improved.

  Preferably, a part of the pipe line of the bathtub system is common to a part of the pipe line of the heating system, and it is a switching valve provided in the common pipe line, wherein water is a pipe line of the bathtub system And a state in which the water flows through the pipeline of the heating system.

  According to the said structure, a part of pipe line of bathtub system is common with a part of pipe line of a heating system. The common pipe line is provided with a switching valve that switches between a state where water flows through the pipe line of the bathtub system and a state where water flows through the pipe line of the heating system. That is, the switching valve provided in the common pipeline can mutually change the pipeline of the bathtub system and the pipeline of the heating system. Therefore, the water in the bath can be prevented from mixing with the water in the heating device.

  Preferably, the switching valve is a bath-traveling valve that switches between a state in which the water flowing through the common pipe is guided to the bath and a state in which the water flowing through the common pipe is guided to the heating device And a bath return switching valve configured to switch between a state in which water in the bathtub is led to the common pipe and a state in which water in the heating device is led to the common pipe.

  According to the said structure, two switching valves of the bath going switching valve and the bath return switching valve are provided. The on-the-bath switching valve switches between a state in which the water flowing in the common conduit is led to the bath and a state in which the water flowing in the common conduit is led to the heating device. In addition, the bath return switching valve switches between a state in which the water in the bathtub is led to the common pipe and a state in which the water in the heating device is led to the common pipe. Therefore, mixing of the water in the bath and the water in the heating device can be suppressed more reliably.

  Preferably, a low temperature capacity is provided in a pipe connecting a cistern functioning as a storage tank for storing water inside and functioning as an air vent, and the common pipe line connecting the cistern and opening and closing the cistern and having a water blocking function. And a switching valve.

  According to the said structure, it can suppress that water overflows from cistern. That is, when the cistern is open, if the water in the bathtub is circulated to the pipeline of the bathtub system, the water in the bathtub may flow to the cistern and overflow from the cistern. On the other hand, according to the said structure, the low temperature capability switching valve which has a water stop function while closing a cistern is provided in the pipe line which connects a pipeline common to a cistern. Therefore, it can control that water overflows from cistern.

  On the other hand, when a heating device drives alone, the water which flows through the pipe line of a heating system may expand or contract. At this time, if the system is closed, air in the heating system pipe may not come out of the heating system pipe, and load may be applied to the heating system pipe. On the other hand, according to the said structure, the low-temperature capability switching valve which opens a cistern is provided in the pipe line which connects with a cistern and a common pipe line. Therefore, it is possible to suppress that the air in the pipe line of the heating system escapes from the system and the load is applied to the pipe line of the heating system.

  According to the present invention, it is possible to provide a hot water supply heating system which can be miniaturized.

It is a top view showing the hot-water supply heating system concerning an 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.

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 an 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.

  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 ··· Hot water supply heating system, 10 · · · Tank unit, 20 · · · · · gas boiler, 21 · · · · · · · 30 · · · heat pump unit, 31 · · · intake unit, 32 · · · exhaust unit 33: housing 40: heating device 50: bathtub 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 · · · tank thermistor, 114 · · · water control valve · · · · 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 inlet thermistor 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 supply latent heat exchanger, 206: hot water supply heat exchanger, 207: bath heat exchanger, 208: combustion fan, 211: original Gas solenoid valve 212: gas proportional valve 213: first gas solenoid valve 214: second gas solenoid valve 215: spark plug 216: flame rod 217 · · Overheat prevention device, 218 · · · water tube thermistor, 219 · · · heat exchange thermistor, 221 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · • ... Hot water supply · · · · · · · · · Exhaust outlet, 227 · · · drain valve, · · · · · intake port, 231 · · · · · · · · · · · · · · neutralizer water level electrode, 233 ... drain tank, 234 · · · Water level electrode, 235 · · · Bath pump, 236 · · · · Recovery pump, 237 · · · · · · · · · · · · · · · · · · · · 239 · · · · overflow valve, 241 · · · thermal valve, 242 · · · · Solenoid valve 243 ··· Heat pump inlet three-way valve 244 · · · Heat pump outlet three-way valve 245 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1st drain switching three-way valve Valve, 248: solenoid valve, 249: bath return four-way valve, 251: plate four-way valve, 252: second drain switching three-way valve, 253: bath water flow switch, 254: Back bath Thermistor, 255: water level sensor, 256: first bath thermistor, 257: second bath thermistor, 258: solenoid valve, 259: first low-temperature capability four-way valve, 261 ··· second low-temperature capability four-way valve, 262 ··· thermal storage three-way valve, 263 · · · low-temperature capability switching valve, 264 · · · solenoid valve, 265 · · · · · · · · · · pouring Solenoid valve, 267, 268 ... check valve, 269 ... hot water amount sensor, 271 ... pouring three-way valve, 294 ... atmosphere open valve, 301 ... first liquid heat exchanger, 302 ... second liquid heat exchanger, 303 ... gas heat exchanger, 304 ... compressor, 305 ... expansion valve, 306 ... fan, 307 ... four-way switching valve, 308 · · Defrost valve, 311 ... inlet thermistor, 312 · · · Outlet thermistor, 313: drain valve, 314: pressure sensor, 315: air supply port, 325: exhaust port, 351: heat medium circulation path, 352, 353: inner pipe , 354: heat medium bypass pipe, 355: outlet pipe, 356: inlet pipe, 357: drainage pipe, 401: high-temperature heating device, 402: low-temperature heating device, 403 · · Heating fan, 404 · · · thermal valve, 405 · · · · · liquid junction, 451 · · · second high temperature heating forward pipe, 452 · · · high temperature heating return pipe, 453 · · · low temperature heating forward pipe 454: low temperature heating return pipe, 601: gas pipe, 602: first gas branch pipe, 603: second gas branch pipe, 604: inlet pipe, 605: Outlet pipe, 606 ... inlet pipe, 607 ... outlet pipe, 60 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 ... 3rd pouring pipe, 646 ... plate going pipe, 691 ... first common pipe, 692 ... second common pipe

Claims (4)

A combustion device for heating supplied water by combustion of a burner;
A heat pump unit having a heat medium circulation path for circulating a heat medium, and performing heat exchange between the heat medium and the supplied water;
A pipe line of a bathtub system that connects at least one of the combustion apparatus and the heat pump unit and a bathtub and circulates water;
A pipe line of a heating system which connects at least one of the combustion apparatus and the heat pump section and a heating apparatus to circulate water;
Equipped with
The hot water supply heating system, wherein a pipe line of the bathtub system is connected to a pipe line of the heating system. A part of the pipe line of the bathtub system is in common with a part of the pipe line of the heating system,
The switching valve provided in the common pipe line, further comprising a switching valve for switching between a state in which water flows through the pipe line of the bathtub system and a state in which water flows through the pipe line of the heating system The hot water supply heating system according to claim 1, characterized in that The switching valve is
A bath switching valve that switches between a state in which the water flowing in the common pipe is led to the bathtub and a state in which the water flowing in the common pipe is led to the heating device;
A bath return switching valve that switches between a state in which the water in the bath is led to the common conduit and a state in which the water in the heating device is led to the common conduit;
The hot water supply heating system according to claim 2, characterized by having. The cistern which stores water inside and functions as a reservoir for removing air,
A low temperature capability switching valve provided in a pipeline connecting the cistern and the common pipeline and opening and closing the cistern and having a water blocking function;
The hot water supply heating system according to claim 2 or 3, further comprising

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