JP2008138888A - Water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a configuration of a hot water supply device for supplying hot water to a hot water tap of a hot water use section and a hot water tap for bath storage, and to achieve a reduction in the number of parts, an improvement in assembling workability, a cost reduction, and the like.
A hot water supply device 10 that joins a hot water supply pipe 13 and a water supply pipe 14 from a hot water storage tank 12 and supplies them to a hot water tap 21 of a hot water use section and a hot water tap 31 for bath hot water storage is provided with a hot water use section. The first mixing valve 23 for supplying hot water to the first hot water supply passage 22 leading to the hot water tap of the second, and the second for supplying hot water to the second hot water supply passage 32 leading to the hot water tap for bath hot water storage A mixing valve 33 is provided. The first and second mixing valves are integrated into one valve body 40 to form a modular mixing valve device 20. Further, electric motors 51 and 52 for driving and controlling the first and second mixing valves are attached to the valve body in parallel.
[Selection] Figure 1

Description

  The present invention relates to a hot water storage type that supplies hot water (hot water) stored in a hot water storage tank to a hot water tap such as a kitchen or a wash basin or a hot water tap for bathing a bathtub in a bathroom (for bath hot water) in an eco cute system, for example. It relates to a water heater.

2. Description of the Related Art Conventionally, as this type of hot water supply apparatus such as a hot water storage type, for example, a hot water storage type hot water supply apparatus with a bath reheating function shown in Patent Document 1 is known. This hot water supply device includes a hot water storage tank for storing hot hot water heated by a heat pump circuit as a heating means, and hot water from this hot water storage tank and water such as tap water are mixed at a predetermined mixing ratio by a mixing valve. The hot water is supplied at a predetermined temperature, and then is supplied for hot water supply to the hot water use section, for hot water filling of the bath, for heat insulation or for reheating.
Furthermore, in a conventional hot water supply device, for example, when the hot water tap for hot water supply is closed, the pressure of the mixed water mixed by the mixing valve suddenly rises and flows back to the hot water or water supply passage where the pressure is low, resulting in a sufficient temperature. Since the hot water and water do not flow into the mixing valve, and it takes time until the desired mixed water is obtained, a check valve that prevents the backflow of hot water and water flowing into the mixing valve is provided. , Provided for each mixing valve. Moreover, in the mixing valve for baths, the hot water in the bathtub flows backward, which is not preferable for hygiene purposes, so a check valve is provided.

JP 2005-061787 A

  In the conventional hot water storage type hot water supply apparatus configured as described above, a mixing valve is provided in each of the hot water supply circuit to the hot water use section and the hot water supply circuit for the bath, and the number of components increases, and piping to each Therefore, there is a problem that the configuration of the entire system is complicated, the assembling work is troublesome, and the space for installing this type of hot water supply device is large.

  This is because the hot water supply to the hot water taps of the hot water and water use parts such as the kitchen and the wash basin described above requires appropriate hot water supply at a predetermined temperature, and therefore requires delicate adjustments, while in the bath. This is because hot water supply for hot water filling or the like does not require strict temperature control, and mixing valves having different structures are used.

  Further, in the conventional hot water supply apparatus described above, it is necessary to provide check valves in the hot water and water supply pipes to each mixing valve. However, if these check valves are provided, the total number of components is large. As a result, the configuration is complicated and the assembly work is troublesome.

  In particular, this type of hot water storage type hot water supply apparatus has been widely adopted in recent years, and there is a demand for simplification of the overall configuration, reduction in the number of components, improvement in assembly, and cost reduction. Therefore, there is a demand for the appearance of a hot water supply device that can satisfy these requirements.

  The present invention has been made in view of such circumstances, simplifying the configuration of a hot water supply device for supplying hot water to the hot water tap of the hot water use section and the hot water tap for bath hot water storage, reducing the number of parts, An object of the present invention is to obtain a hot water supply device capable of achieving improvement in assembly workability and cost reduction.

  In order to meet such an object, a hot water supply apparatus according to the present invention (the invention according to claim 1) includes a hot water supply pipe for supplying hot water from a hot water storage tank and a water supply pipe for supplying water via a mixing valve. A hot water supply device that joins and supplies a hot water tap of a hot water use section or a hot water tap for bath water storage, wherein the first mixing for supplying hot water to the first hot water passage leading to the hot water tap of the hot water use section A first mixing valve, a second mixing valve for supplying hot water to a second hot water supply passage leading to a hot water tap for storing hot water, and an actuator for driving and controlling the first and second mixing valves; A second electric motor is provided, and the first valve body incorporating the first mixing valve and the second valve body incorporating the second mixing valve are arranged side by side in close proximity, The first and second electric motors are connected to respective valve bodies. Characterized in that it was attached.

  A hot water supply apparatus according to the present invention (invention of claim 2) combines a hot water supply pipe for supplying hot water from a hot water storage tank and a water supply pipe for supplying water via a mixing valve, so A hot water supply device for supplying water to a tap or a hot water tap for hot water storage, a first mixing valve for supplying hot water to a first hot water supply passage leading to the hot water tap of the hot water use section, and hot water for hot water for bath storage A second mixing valve for supplying hot water to the second hot water supply passage leading to the stopper, and first and second electric motors constituting actuators for driving and controlling the first and second mixing valves, While configuring these first and second mixing valves into a single valve body to form a modular mixing valve device, the first and second electric motors are arranged side by side, It is attached to the valve body. .

  A hot water supply apparatus according to the present invention (invention according to claim 3) is the hot water supply apparatus according to claim 1 or 2, wherein the hot water supply pipe and the water supply pipe are upstream of the first and second mixing valves. A first check valve and a second check valve are respectively provided on the side of the hot water supply pipe, and the first check valve and the second check valve in the hot water supply pipe are arranged in a direction perpendicular to the motor rotation axis in the valve body. The first and second check valves in the water supply pipe are integrated with the other of the sub bodies. The first and second check valves in the water supply pipe are integrated with one of the pair of sub bodies provided so as to sandwich the valve body from both sides. It is characterized in that it is attached by incorporating it.

  A hot water supply apparatus according to the present invention (invention according to claim 4) is the hot water supply apparatus according to claim 3, wherein the first and second sub-bodies include hot water or hot water from a water supply pipe. Alternatively, a valve hole is provided in which a water supply path and first and second branch supply paths for supplying hot water or water to the first and second mixing valves are opened, and the first and second branch supplies are provided. The passage is positioned so as to open on both sides of the hot water or water supply passage in the longitudinal direction of the valve hole, and in the valve hole, the valve bodies constituting the first and second check valves are the first , Arranged to move back and forth in the longitudinal direction of the valve hole so as to selectively block the flow of hot water or water to the second branch supply path, and urged by a tension spring provided between these valve bodies It is configured to be in a closed state by being To.

  A hot water supply apparatus according to the present invention (invention of claim 5) is the hot water supply apparatus according to any one of claims 1 to 4, wherein the first hot water supply passage leading to the hot water tap of the hot water use section is provided. The actuator for driving and controlling the first mixing valve for supplying hot water includes a shape memory alloy as a flow rate control means, and operates by detecting the hot water temperature by the shape memory alloy, whereby the flow rate of hot water in the first hot water supply passage. A shape memory alloy actuator for controlling and an electric motor for controlling the mixing ratio of hot water and water, and a second for supplying hot water to a second hot water supply passage leading to the hot water tap for bath hot water storage. The actuator for driving and controlling the mixing valve is constituted by an electric motor for controlling the mixing ratio of hot water and water.

  According to the hot water supply apparatus of the present invention (the invention described in claim 1), a valve body having a built-in mixing valve for supplying hot water to the hot water tap of the hot water use section and the hot water tap for bath hot water storage is arranged in parallel. Since the hot water supply system is downsized, the hot water supply pipe and water supply pipe can be shared until just before the mixing valve device, simplifying the overall system configuration and assembling work. And has various excellent effects such as easy maintenance. In addition, according to the present invention, the space generated by the downsizing can be used for other functions and other devices, and can correspond to a hot water supply device that is becoming more multifunctional.

  According to the hot water supply apparatus according to the present invention (the invention described in claim 2), the mixing valve for supplying hot water to the hot water tap of the hot water use section and the hot water tap for bath hot water storage is configured as an integral module. Therefore, the number of components in the entire hot water supply system is reduced, and the hot water supply pipe and water supply pipe can be used in common until just before the mixing valve device, thus simplifying the overall system configuration and assembling work. There are various excellent effects such as simple and easy maintenance. Further, according to the present invention, the space generated by the simplification can be used for other functions and other devices, and can correspond to a hot water supply device that is becoming more multifunctional.

In particular, according to the present invention, since it is a modularized configuration, there is no difference in layout such as the length of the connection pipe, the number of bendings, and the branch position due to the difference in the system.
Further, according to the present invention, since the first and second electric motors are also provided side by side with the valve body, it is possible to provide the electric motor covers in common or close to each other. In addition to the integration of the water supply and hot water supply circuits as described above, the motor portion that is an actuator can be integrated, and common parts such as a cover can be formed, and the size can be reduced.

  According to the present invention (the invention described in claim 3), in addition to the operation and effect of the above-described claim 1 or 2, the sub-body incorporating the check valve is assembled integrally with the valve body of the mixing valve device. Therefore, there are advantages such as reduction in the number of parts in the entire system, simplification of the configuration, and superiority in assembling properties.

  According to the present invention (the invention described in claim 4), in addition to the operation and effect of the above-described claim 3, the two check valves are integrally configured, so that the configuration is simplified, and two Since the urging means in the check valve can be constituted by one tension spring, the number of parts can be reduced as well as the sharing of the body, and the effect can be exhibited in assembling property and cost reduction.

  According to the hot water supply apparatus according to the present invention (the invention described in claim 5), in addition to the operational effects of the first to fourth aspects described above, the hot water to the hot water tap of the hot water use section and the hot water tap for bath hot water storage is provided. There is an advantage that supply of water can be performed appropriately and reliably, and the effect as a hot water supply device can be exhibited.

1 to 5 show an embodiment of a hot water supply apparatus according to the present invention.
In this embodiment, for example, as an eco-cute system, atmospheric heat is collected by a heat pump heat exchanger, water is heated using the heat exchanger, and hot water is stored in a hot water storage tank so that it is provided in a hot water use section such as a kitchen or a washroom. Hot water storage with a hot water supply function that can keep the hot water remaining in the bathtub or keep it warm, as well as hot water supplied to the hot water tap that has been used, as well as a hot water tap for bath hot water (for bathing in a bath tub) A case where the water heater is of the type will be described. In addition, this hot water storage type hot water supply device with a bath replenishment function can boil and store hot water in the midnight hours when the unit price of contracted power by time is low, and the stored hot water can be used for hot water supply. It is low in cost and excellent in terms of environment.

In FIG. 1, a hot water storage type hot water supply apparatus generally indicated by reference numeral 10 includes a hot water storage tank 12 that stores hot water heated by using atmospheric heat recovered by a heat pump heat exchanger 11.
13 is a hot water supply pipe for supplying hot water from the hot water storage tank 12, 14 is a water supply pipe for supplying water, and the water supply pipe 14 is partially connected to the hot water storage tank 12, and the hot water A pipe that is joined to the supply pipe 13 is provided, and a mixing valve device 20 that characterizes the present invention is provided at the joining portion.

  That is, as shown in FIGS. 3 to 5, the mixing valve device 20 is a first for supplying hot water to the first hot water supply passage 22 leading to the hot water tap of the hot water use section 21 such as a kitchen or a washroom. And a second mixing valve 33 for supplying hot water to a second hot water supply passage 32 leading to a hot water tap (hot water supply part) 31 for bath hot water storage. These first and second The mixing valves 23 and 33 are integrated into one valve body 40 to be modularized.

In the figure, 13a is a pressure relief part provided in the middle of the hot water supply pipe 13, and 14a is a pressure reducing valve provided in the water supply pipe 14.
Further, 35 is a reheating circuit by a heat exchanging part attached to the hot water storage tank 12, 36 is a reheating pipe, and 37 is a reheating pump provided in the reheating pipe 36.
Further, in the figure, 22a and 33a are flow rate sensors provided in the first and second hot water supply passages 22 and 32, 32b is an electromagnetic valve provided in the second hot water supply passage 32, and 32c is a shutoff valve.

  As is well known, the heat pump heat exchanger 11 includes an expansion valve 15 that decompresses the refrigerant, a heat recovery unit 16 that recovers heat from the air, a compressor 17, and a circulation circuit 12a on the hot water storage tank 12 side. The heat exchanger 18 is configured to heat the hot water in the hot water storage tank 12 to form high temperature hot water.

  As described above, when the mixing valves 23 and 33 for supplying hot water to the hot water tap of the hot water usage section 21 and the hot water tap 31 for bath hot water storage are configured as an integrated module, the number of components as the hot water supply device 10 as a whole is reduced. In addition, since the hot water supply pipe 13 and the water supply pipe 14 can be made common until immediately before the mixing valve device 20, the configuration of the entire system is simplified, the assembly work is simple, and the maintenance is easy. Can be done. In addition, the space generated by such simplification can be used for other functions and other devices, which is effective in adapting to a hot water supply device that is becoming increasingly multifunctional.

  Here, the first mixing valve 23 for supplying hot water to the first hot water supply passage 22 leading to the hot water tap of the hot water use section 21 is provided with a shape memory alloy 23a such as SMA as a flow control means. A shape memory alloy actuator for controlling the flow rate of hot water in the first hot water supply passage 22 by operating by detecting the hot water temperature by the memory alloy 23a, and an electric motor 51 for controlling the mixing ratio of hot water and water, It is used as an actuator. The structure of the first mixing valve 23 of this kind is well known in the art as shown in, for example, Japanese Patent Laid-Open No. 61-52478, and detailed description thereof is omitted.

  The second mixing valve 33 for supplying hot water to the second hot water supply passage 32 leading to the hot water tap 31 for bath hot water storage has an electric motor 52 for controlling the mixing ratio of hot water and water, It is used as an actuator. Such a second mixing valve 33 is a conventional concept as apparent from a mixing valve disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-179715, and a detailed description thereof is omitted.

  When the first and second mixing valves 23 and 33 having such a configuration are used, the supply of hot water to the hot water tap of the hot water usage section 21 and the hot water tap 31 for bath hot water storage is appropriately and reliably required. Needless to say, the effect of the hot water supply device 10 can be achieved.

The valve body 40 is formed with first and second valve holes 41 and 42 in which the first and second mixing valves 23 and 33 are arranged close to each other. The first and second mixing valves 23, 33 are arranged with hot water, a hot water supply passage 13 for supplying water, a water supply passage 14, and a hot water tap of the hot water usage section 21 or a hot water tap 31 for bath hot water storage. Part of the first and second hot water supply passages 22 and 32 is formed.
According to such a configuration, there is an advantage that the mixing valve device 20 can be easily assembled.

Here, the first and second valve holes 41 and 42 are formed in the valve body 40 so that their respective axes are parallel and close to each other, and the first and second valve holes 41 and 42 are aligned with the valve holes 41 and 42. The hot water supply passage 13, the water supply passage 14, and the first and second hot water supply passages 22 and 32 are formed to open. Note that the positions of the passages 13, 14, 22, 32 and the like that are open to the valve holes 41, 42 are well known in the art and will not be described in detail here.
The electric motors 51 and 52, which are actuators for the mixing valves 23 and 33, are attached to one end side of the valve holes 41 and 42 with their motor shafts aligned.
According to such a configuration, there is an advantage that the configuration of the mixing valve device 20 is simplified, excellent in workability and assembly, and the mixing valve device 20 can be downsized.

  The hot water supply pipe 13 and the water supply pipe 14 are located on the upstream side of the first and second mixing valves 23 and 33 as is apparent from FIGS. Check valves 61 and 62 are respectively provided. The first and second check valves 61, 62 in the hot water supply pipe 13 are a pair of sub bodies attached so as to sandwich the valve body 40 from both sides of the valve body 40 in the direction orthogonal to the motor rotation axis. It is attached by being integrated into one of 63 and 64 (here, in the first sub-body 63). Further, the first and second check valves 61 and 62 in the water supply pipe 14 are integrally provided on the other of the sub bodies (here, in the second sub body 64).

  Here, as shown in FIG. 2, the first and second sub bodies 63 and 64 include hot water, hot water from the water supply pipe 14 or the water supply pipe 14, or a water supply path (13, 14). There are provided valve holes 67 through which first and second branch supply passages 65 and 66 for supplying hot water or water to the first and second mixing valves 23 and 33 are opened. The two branch supply passages 65 and 66 are positioned so as to open on both sides of the hot water or water supply passage (13, 14) in the longitudinal direction of the valve hole 67. In the valve hole 67, the valve elements constituting the first and second check valves 61 and 62 flow hot water or water to the first and second branch supply paths 65 and 66. The valve hole 67 is arranged so as to be selectively prevented from moving forward and backward, and is configured to be closed by being biased by a tension spring 68 provided between these valve bodies. Yes.

  In FIG. 2A, the pressure in the mixing valve (23, 33) is higher than the pressure in the hot water and water supply passages (13, 14), and both the check valves 61, 62 are in the closed state. FIG. 6B shows that the pressure in the hot water and the water supply path is higher than the pressure in the hot water mixing valve 23 and lower than the pressure in the bath mixing valve 33, and the one-side check valve 61 is When in the open state, FIG. 5C shows the case where the pressure of the hot water and the water supply path is higher than the pressure in the hot water supply mixing valve (23, 33), and both are in the open state. Here, the check valves 61 and 62 are opened and closed due to pressure fluctuations associated with the opening and closing of the hot water tap on the hot water supply side.

According to such a configuration, the four check valves required on the upstream side of the first and second mixing valves 23 and 33 are integrally assembled to the valve body 40 of the mixing valve device 20. Therefore, it is excellent in terms of reduction in the number of parts in the entire system, simplification of configuration, assemblability and the like.
In particular, in the above-described configuration, as is apparent from FIG. 2, the two check valves 61 and 62 on the hot water supply side and the water supply side are integrally configured in the sub bodies 63 and 64, respectively. Since the configuration is simple and the urging means in the two check valves 61 and 62 can be configured by one tension spring 68, the number of parts can be reduced, the number of parts can be reduced, the assemblability can be improved, the cost can be reduced, etc. Can be achieved.
Furthermore, although not shown, when the pressure in one of the mixing valves is lower than the pressure in the other mixing valve and lower than the pressure of the hot water and water supply passages, one mixing valve It is also possible to prevent the flow rate once flowing into the other mixing valve from flowing into the other mixing valve.

  According to the hot water supply device 10 having the above configuration, when the hot water tap of the hot water use section 21 is opened, the hot water and water from the hot water supply pipe 13 and the water supply pipe 14 are transferred to the first mixing valve 23 in the mixing valve device 20. Thus, the hot water supply passage 22 is mixed and mixed at a required mixing ratio, and hot water is supplied. When the hot water tap 31 for bath hot water storage is opened, hot water and water from the hot water supply pipe 13 and the water supply pipe 14 are mixed by the second mixing valve 33 in the mixing valve device 20 at a predetermined mixing ratio. The hot water supply passage 32 is supplied and hot water storage (hot water filling) is performed in the bath.

Needless to say, the present invention is not limited to the structure described in the above-described embodiment, and the shape, structure, and the like of each part constituting hot water supply apparatus 10 can be appropriately modified and changed.
For example, in the embodiment described above, the case where the first and second mixing valves 23 and 33 are built in one valve body 40 has been described, but the present invention is not limited to this, and the first and second mixing valves are not limited thereto. The first and second valve bodies incorporating the valves 23 and 33 may be arranged close to each other. That is, even in such a configuration, the entire hot water supply apparatus is miniaturized, and the hot water supply pipe and the water supply pipe can be made common until immediately before the mixing valve apparatus, as in the above-described embodiment. The overall configuration is simplified, the assembly work is simple, and maintenance is easy. Furthermore, the space generated by such downsizing can be used for other functions and other devices, and can correspond to hot water supply devices that are becoming increasingly multifunctional.

  Furthermore, in the above-described embodiment, when the first and second electric motors 51 and 52 that drive and control the first and second mixing valves 23 and 33 are attached to the valve body 40 in a state where they are arranged close to each other. However, the present invention is not limited to this, and the first electric motor 51 is provided on one end side of the valve body 40, and the second electric motor 52 is opposed to the other end side of the valve body 40. May be provided. That is, even with this configuration, substantially the same operational effects as those of the above-described embodiment can be obtained.

  In short, in a state where the first and second mixing valves 23 and 33 are arranged so that the respective axes are parallel and close to each other, the first and second mixing valves 23 and 33 are arranged in the axial direction of the respective mixing valves 23 and 33. It is only necessary that the motor shaft of the second electric motor 51.52 be positioned. According to such a configuration, the first and second mixing valves 23 and 33 are arranged in parallel, so that they can be installed in any direction and have a high degree of freedom in layout. There is an advantage. In other words, the first and second mixing valves 23 and 33 and the first and second electric motors 51 and 52 that drive and control the mixing valve device 20 including the valve body 40 are assembled. Whether it is laid out vertically or horizontally, it can be connected to the piping system such as the hot water supply pipe 13 and the water supply pipe 14 in a desired state. The degree of freedom is large.

  Moreover, although the hot water supply apparatus which concerns on this invention is comprised so that the hot water heated with the heat pump type heat exchanger 11 may be stored in the hot water storage tank 12, it is not limited to this, Appropriate heating as conventionally known is known. Needless to say, one heated by means may be used.

It is a schematic block diagram which shows one Embodiment of the hot water storage type hot-water supply apparatus which concerns on this invention. (A), (b), (c) is a schematic sectional drawing for demonstrating schematic structure of the non-return valve arrange | positioned in the upstream part of a mixing valve apparatus, and its movement. It is a schematic perspective view of the mixing valve apparatus characterizing the present invention. FIG. 4 is a schematic perspective view showing a partial cross section of the mixing valve device of FIG. 3. It is the schematic perspective view which looked at the mixing valve apparatus of FIG. 3, FIG. 4 from another direction.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Hot water supply apparatus, 11 ... Heat pump type heat exchanger, 12 ... Hot water storage tank, 13 ... Hot water supply pipe, 14 ... Water supply pipe, 20 ... Mixing valve apparatus, 21 ... Hot water use part (hot water tap), 22 ... 1st Hot water supply passage, 23 ... first mixing valve, 23a ... shape memory alloy, 31 ... hot water tap for bath hot water storage, 32 ... second hot water supply passage, 33 ... second mixing valve, 40 ... valve body, 41, 42 ... valve hole, 51, 52 ... electric motor, 61, 62 ... first and second check valves, 63, 64 ... subbody, 67 ... valve hole, 68 ... tension spring (biasing means).

Claims (5)

A hot water supply device that joins a hot water supply pipe for supplying hot water from a hot water storage tank and a water supply pipe for supplying water via a mixing valve, and supplies the hot water supply section to a hot water tap or a hot water tap for bath hot water. ,
A first mixing valve for supplying hot water to the first hot water supply passage leading to the hot water tap of the hot water use section and a second for supplying hot water to the second hot water supply passage leading to the hot water tap for bath hot water storage And a first electric motor and a second electric motor constituting an actuator for driving and controlling the first and second mixing valves,
The first valve body incorporating the first mixing valve and the second valve body incorporating the second mixing valve are arranged side by side in close proximity,
A hot water supply apparatus, wherein the first and second electric motors are attached to respective valve bodies. A hot water supply device that joins a hot water supply pipe for supplying hot water from a hot water storage tank and a water supply pipe for supplying water via a mixing valve, and supplies the hot water supply section to a hot water tap or a hot water tap for bath hot water. ,
A first mixing valve for supplying hot water to the first hot water supply passage leading to the hot water tap of the hot water use section and a second for supplying hot water to the second hot water supply passage leading to the hot water tap for bath hot water storage And a first electric motor and a second electric motor constituting an actuator for driving and controlling the first and second mixing valves,
These first and second mixing valves are integrated into one valve body to constitute a modular mixing valve device,
A hot water supply apparatus characterized by being attached to the valve body in a state in which the first and second electric motors are arranged side by side. In the hot water supply device according to claim 1 or 2,
The hot water supply pipe and the water supply pipe are respectively provided with first and second check valves located upstream of the first and second mixing valves,
The first and second check valves in the hot water supply pipe are integrally formed with one of a pair of sub bodies provided so as to sandwich the valve body from both sides of the valve body in a direction perpendicular to the motor rotation axis. It is attached by incorporating,
The hot water supply apparatus according to claim 1, wherein the first and second check valves in the water supply pipe are attached by being integrated into the other of the sub bodies. The hot water supply apparatus according to claim 3,
The first and second sub-bodies are supplied with hot water or hot water from a water supply pipe or hot water or a water supply passage, and first and second hot water or water are supplied to the first and second mixing valves. A valve hole is provided to open the second branch supply path;
The first and second branch supply paths are positioned so as to open on both sides of the hot water or water supply path in the longitudinal direction of the valve hole,
In the valve hole, the valve body constituting the first and second check valves selectively blocks the flow of hot water or water to the first and second branch supply passages. A hot water supply apparatus, which is arranged so as to move forward and backward in the longitudinal direction of the valve body and is closed by being biased by a tension spring provided between these valve bodies. The hot water supply device according to any one of claims 1 to 4,
The actuator for driving and controlling the first mixing valve for supplying hot water to the first hot water supply passage leading to the hot water tap of the hot and cold water use section includes a shape memory alloy as a flow rate control means, and detects hot water temperature by the shape memory alloy. Comprising a shape memory alloy actuator for controlling the flow rate of hot water in the first hot water supply passage by being actuated by, and an electric motor for controlling the mixing ratio of hot water and water,
The actuator for driving and controlling the second mixing valve for supplying hot water to the second hot water supply passage leading to the hot water tap for bath hot water storage is constituted by an electric motor for controlling the mixing ratio of hot water and water. A hot water supply apparatus characterized by

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