JP6305148B2 - Hot water system - Google Patents

Description

  The present invention relates to a hot water supply system that supplies hot water to a heat consuming device using hot water supplied from a high temperature water supply device having a hot water storage tank for storing hot water.

  A hot water supply system that supplies hot water to a heat consuming device includes a high temperature water supply device that generates and supplies high temperature water to the heat consuming device. Examples of the high-temperature water supply device include a type in which tap water is heated by a heating device such as an instantaneous water heater, and a type in which high-temperature hot water stored in a hot water storage tank is supplied. In the former case, the water pressure of the tap water supplied to the user is relatively high because the water pressure of the tap water is almost directly applied to the hot water supplied to the heat consuming apparatus. For this reason, when hot water is supplied to a heat consuming device such as a shower, hot water with a relatively high water pressure can be supplied, which is convenient for the user and allows the user to obtain satisfaction. In the latter case, if the supply pressure of tap water is applied to the hot water stored in the hot water storage tank, the hot water storage tank may break down (for example, breakage). Water is supplied to the hot water storage tank. Therefore, even if the hot water pressure discharged from the hot water storage tank is high, it becomes the pressure after depressurizing the tap water, and the water pressure of the hot water supplied to the heat consuming device becomes relatively low.

  Several hot water storage systems that respond to such a demand that the pressure of hot water supplied to the heat consuming device needs to be increased have been proposed. For example, in the hot water storage system described in Patent Document 1, water is supplied to the hot water storage tank (1) via the first pressure reducing valve (11). Thereby, the pressure added to the hot water stored in the hot water storage tank (1) can be kept low. And, to the heat consuming device, a relatively low pressure high temperature water stored in the hot water storage tank (1) and a relatively high pressure low temperature supplied from the bypass pipe (4) not passing through the hot water storage tank (1). Water (for example, water after being depressurized by the second pressure reducing valve (13)) is mixed with the mixing valve (14) and then supplied. In this way, the pressure of hot water supplied to the heat consuming device is being increased.

  Patent Document 2 also describes a similar hot water storage system. Specifically, the hot water storage tank (2) is prevented from being damaged by supplying water to the hot water storage tank (2) through the pressure reducing valve (3). Then, the hot water discharged from the hot water storage tank (2) and the non-depressurized water supplied via the bypass pipe (12) are mixed, and the mixed hot water is supplied to the hot water supply port (10). Supply.

  The hot water supply system described in Patent Document 3 includes an indirect heat exchanger (10) in which high-pressure water exchanges heat with high-temperature water stored in a hot water storage tank (1). The indirect heat exchanger (10) is configured to supply high-pressure hot water heated by exchanging heat with the high-temperature water stored in the hot water storage tank (1) to the heat consuming device. Yes.

JP 2010-121827 A JP 2006-266598 A Japanese Patent No. 4073745

  As described above, there are several hot water supply systems that can increase the pressure of hot water supplied to the heat consuming device while reducing the pressure applied to the hot water storage tank, but each system still includes the following problems. Yes.

For example, in the hot water supply systems described in Patent Literature 1 and Patent Literature 2, since the water supply pressure to the hot water storage tank is relatively low, the high temperature water discharged from the hot water storage tank is also relatively low pressure. Therefore, even if relatively high-pressure water is mixed with the low-pressure high-temperature water, the pressure of the hot water supplied to the heat consuming device cannot be significantly improved.
Moreover, in the hot water supply system described in Patent Document 3, since it is necessary to provide an indirect heat exchanger, there are a problem that the cost increases, a problem that a loss due to heat exchange occurs, and the like.

  This invention is made | formed in view of said subject, The objective is with respect to a heat consumption apparatus using the hot water supplied from the high temperature water supply apparatus which has the hot water storage tank which stores hot water, and a heating apparatus. The point is to provide a hot water supply system capable of supplying high-pressure hot water.

The characteristic configuration of the hot water supply system according to the present invention for achieving the above object is as follows:
A hot and cold water mixing device for mixing hot water with relatively high temperature and low temperature water with relatively low temperature to produce hot water at a set temperature to be supplied to the heat consuming device;
A water supply channel through which water supplied at a predetermined water supply pressure from a water supply source flows;
A pressure reducing device that is provided in the middle of the water supply channel and that flows to the downstream side after reducing the pressure of water supplied from the upstream side at the predetermined water supply pressure;
A bypass for bypassing the pressure reducing device and flowing water;
A water supply path switching device for switching whether to flow water to the decompression device or to flow water to the bypass path;
A high-temperature water supply device that is connected to the water supply channel on the downstream side of the decompression device and the bypass channel and supplies the high-temperature water to the hot-water mixing device using the pressure of water supplied from the water supply channel When,
A controller for controlling the operation of the hot and cold water mixing device, the water supply path switching device and the high temperature water supply device,
The high temperature water supply device includes a hot water storage tank that stores hot water as the high temperature water, and a heating device that generates the high temperature water by heating hot water stored in the hot water storage tank or water supplied from the water supply channel. And
The high-temperature water supply device includes:
A first inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank, or a second inflow state in which water flowing through the water supply channel is supplied to the heating device without passing through the hot water storage tank, or An inflow state switching device for switching to a third inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank and also supplied to the heating device without passing through the hot water storage tank; and
A first outflow state in which hot water stored in the hot water storage tank flows out to the hot water mixing device through the heating device, or hot water stored in the hot water storage tank without passing through the heating device. An outflow state switching device that switches to a second outflow state that causes the hot water and water mixing device to flow out;
When the hot water is supplied to the heat consuming device by supplying the high temperature water to the hot water mixing device via the hot water storage tank, the control device causes the water to flow through the bypass passage. Operate the switching device,
When the consumption of hot water in the heat consuming device ends when hot water is supplied to the heat consuming device by supplying the hot water to the hot water mixing device via the hot water storage tank, the inflow state The switching device is operated in the second inflow state or the third inflow state .

According to the above characteristic configuration, the high-temperature water supply device is connected to the water supply channel and supplies hot water to the heat consuming device using the pressure of the water supplied from the water supply channel. In addition, in the middle of the water supply path connected to the high-temperature water supply apparatus, there is provided a water supply path switching device for switching whether to flow water to the decompression device or to flow water to the bypass path. That is, when water is supplied to the decompression device by the water supply path switching device, the pressure of the water supplied to the high temperature water supply device can be relatively lowered. As a result, although the pressure of the hot water supplied to the heat consuming device is relatively low, the water pressure applied to the hot water inside the high temperature water supply device can be kept relatively low, so there is a problem such as a failure due to the water pressure. Can be avoided. On the other hand, when water is caused to flow through the bypass path by the water supply path switching device, the pressure of the water supplied to the high temperature water supply device can be relatively increased. As a result, since the pressure of hot water supplied to the heat consuming device is relatively high, when supplying hot water to a heat consuming device such as a shower, hot water with a relatively high water pressure can be supplied. It is easy to use, and users can get satisfaction.
Further, a predetermined state switching device is provided on the inflow side and the outflow side. When the inflow state switching device switches to the first inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank, the pressure of the water supplied from the water supply channel is added to the hot water stored in the hot water storage tank. . As a result, the hot water stored in the hot water storage tank can be supplied to the hot water mixing device using the pressure of the water supplied from the water supply channel.
When the inflow state switching device switches to the second inflow state where the water flowing through the water supply channel is supplied to the heating device without going through the hot water storage tank, the hot water heated by the heating device is supplied from the water supply channel. The water pressure can be supplied to the hot water mixing device. Moreover, since the pressure of the water supplied from a water supply channel is not added to the hot water stored in the hot water storage tank, the problem that a hot water storage tank breaks down by the pressure of the water supplied from a water supply channel can also be avoided.
When the inflow state switching device switches to the third inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank and also supplied to the heating device without passing through the hot water storage tank, the hot water stored in the hot water storage tank In addition, by adding the pressure of the water supplied from the water supply channel, the hot water stored in the hot water storage tank can be supplied to the hot water mixing device using the pressure of the water supplied from the water supply channel and heated. Hot water after being heated by the apparatus can be supplied to the hot water mixing apparatus by using the pressure of the water supplied from the water supply channel.
In addition, according to the above characteristic configuration, when the outflow state switching device is switched to the first outflow state in which the hot water stored in the hot water storage tank flows out to the hot water mixing device via the heating device, the hot water storage tank The stored hot water can be supplied to the heat consuming device after the temperature is raised by the heating device. That is, even if the amount of heat stored in the hot water storage tank is small, sufficient heat can be supplied to the heat consuming device.
When the outflow state switching device is switched to the second outflow state in which hot water stored in the hot water storage tank flows out to the hot water mixing device without going through the heating device, the heating device does not raise the temperature of the hot water. Hot water stored in the hot water storage tank can be supplied to the heat consuming device.

Furthermore, according to the above-described characteristic configuration, the control device supplies hot water to the hot water mixing device via the hot water storage tank so that the hot water is supplied to the heat consuming device so that the water flows through the bypass passage. Operate the water supply path switching device. That is, in a state where hot water is supplied to the heat consuming device by supplying high temperature water to the hot water mixing device via the hot water storage tank, hot water flows out to the heat consuming device via the hot water storage tank, The water pressure inside the hot water tank does not become very high. As a result, even if relatively high-pressure water that has passed through the bypass passage is supplied to the hot water storage tank, the problem that the hot water storage tank breaks down due to water pressure can be avoided, and a relatively high pressure is applied to the heat consuming device. High temperature water can be supplied.
In addition, the control device supplies the hot water to the hot water mixing device via the hot water storage tank, and when the hot water is consumed in the heat consuming device while the hot water is supplied to the heat consuming device, the inflow state is reached. The switching device is operated to the second inflow state or the third inflow state. In other words, since the pressure of water applied from the water supply channel to the high temperature water supply device is dispersed toward the heating device, when the consumption of hot water in the heat consumption device is finished, Even if the water pressure increases, the pressure increase does not occur only in the hot water storage tank. As a result, the problem that the hot water storage tank breaks down due to water pressure can be avoided.

Another characteristic configuration of the hot water supply system according to the present invention is:
A plurality of the heat consuming devices including a bathtub are connected in parallel via a proportional valve on the downstream side of the hot water / water mixing device,
The controller supplies hot water to at least one heat consuming device other than the bathtub among the plurality of heat consuming devices by supplying the hot water to the hot water mixing device via the hot water storage tank. The water supply path switching device is operated so that water flows through the bypass path,
Consumption of hot water in the at least one heat consuming device is completed in a state where hot water is supplied to the at least one heat consuming device by supplying the high temperature water to the hot water mixing device via the hot water storage tank. When this is done, the proportional valve is operated so that hot water is supplied to the bathtub .

According to the above characteristic configuration, the control device causes the water to flow through the bypass when the hot water is supplied to at least one heat consuming device by supplying high temperature water to the hot water mixing device via the hot water storage tank. The water supply path switching device is operated. That is, when hot water is supplied to at least one heat consuming device by supplying high temperature water to the hot water mixing device via the hot water storage tank, the hot water is supplied to at least one heat consuming device via the hot water storage tank. Since the water is flowing out, the water pressure inside the hot water storage tank does not become very high. As a result, even if relatively high-pressure water passing through the bypass passage is supplied to the hot water storage tank, the problem that the hot water storage tank fails due to water pressure can be avoided, and relative to at least one heat consuming device. High pressure water with high pressure can be supplied.
In addition, the control device supplies the hot water to the hot water mixing device via the hot water storage tank so that the hot water is supplied to at least one heat consumption device other than the bathtub. When consumption of hot water is finished, the proportional valve is operated so that hot water is supplied to the bathtub. In other words, since the pressure of water applied from the water supply channel to the high-temperature water supply device is dispersed toward the bathtub, the hot water supply device ends when the consumption of hot water in at least one heat consumption device is finished. Even if the water pressure in the tank rises, the pressure rise will not occur only in the hot water storage tank. As a result, the problem that the hot water storage tank breaks down due to water pressure can be avoided. In addition, since the hot water supplied to the bathtub is hot water after the temperature is adjusted by the hot water mixing device, even if hot water is supplied to the bathtub at a timing not intended by the user, the user is damaged. The possibility of reaching can be lowered.

Still another characteristic configuration of the hot water supply system according to the present invention is as follows:
A hot and cold water mixing device for mixing hot water with relatively high temperature and low temperature water with relatively low temperature to produce hot water at a set temperature to be supplied to the heat consuming device;
A water supply channel through which water supplied at a predetermined water supply pressure from a water supply source flows;
A pressure reducing device that is provided in the middle of the water supply channel and that flows to the downstream side after reducing the pressure of water supplied from the upstream side at the predetermined water supply pressure;
A bypass for bypassing the pressure reducing device and flowing water;
A water supply path switching device for switching whether to flow water to the decompression device or to flow water to the bypass path;
A high-temperature water supply device that is connected to the water supply channel on the downstream side of the decompression device and the bypass channel and supplies the high-temperature water to the hot-water mixing device using the pressure of water supplied from the water supply channel When,
A controller for controlling the operation of the hot and cold water mixing device, the water supply path switching device and the high temperature water supply device,
The high temperature water supply device includes a hot water storage tank that stores hot water as the high temperature water, and a heating device that generates the high temperature water by heating hot water stored in the hot water storage tank or water supplied from the water supply channel. And
A plurality of the heat consuming devices including a bathtub are connected in parallel via a proportional valve on the downstream side of the hot water / water mixing device,
The controller supplies hot water to at least one heat consuming device other than the bathtub among the plurality of heat consuming devices by supplying the hot water to the hot water mixing device via the hot water storage tank. The water supply path switching device is operated so that water flows through the bypass path,
Consumption of hot water in the at least one heat consuming device is completed in a state where hot water is supplied to the at least one heat consuming device by supplying the high temperature water to the hot water mixing device via the hot water storage tank. When this is done, the proportional valve is operated so that hot water is supplied to the bathtub .

According to the above characteristic configuration, the high-temperature water supply device is connected to the water supply channel and supplies hot water to the heat consuming device using the pressure of the water supplied from the water supply channel. In addition, in the middle of the water supply path connected to the high-temperature water supply apparatus, there is provided a water supply path switching device for switching whether to flow water to the decompression device or to flow water to the bypass path. That is, when water is supplied to the decompression device by the water supply path switching device, the pressure of the water supplied to the high temperature water supply device can be relatively lowered. As a result, although the pressure of the hot water supplied to the heat consuming device is relatively low, the water pressure applied to the hot water inside the high temperature water supply device can be kept relatively low, so there is a problem such as a failure due to the water pressure. Can be avoided. On the other hand, when water is caused to flow through the bypass path by the water supply path switching device, the pressure of the water supplied to the high temperature water supply device can be relatively increased. As a result, since the pressure of hot water supplied to the heat consuming device is relatively high, when supplying hot water to a heat consuming device such as a shower, hot water with a relatively high water pressure can be supplied. It is easy to use, and users can get satisfaction.
In addition, the control device switches the water supply path so that when hot water is supplied to at least one heat consuming device by supplying high temperature water to the hot water mixing device via the hot water storage tank, water flows through the bypass passage. Operate the device. That is, when hot water is supplied to at least one heat consuming device by supplying high temperature water to the hot water mixing device via the hot water storage tank, the hot water is supplied to at least one heat consuming device via the hot water storage tank. Since the water is flowing out, the water pressure inside the hot water storage tank does not become very high. As a result, even if relatively high-pressure water passing through the bypass passage is supplied to the hot water storage tank, the problem that the hot water storage tank fails due to water pressure can be avoided, and relative to at least one heat consuming device. High pressure water with high pressure can be supplied.
In addition, the control device supplies the hot water to the hot water mixing device via the hot water storage tank so that the hot water is supplied to at least one heat consumption device other than the bathtub. When consumption of hot water is finished, the proportional valve is operated so that hot water is supplied to the bathtub. In other words, since the pressure of water applied from the water supply channel to the high-temperature water supply device is dispersed toward the bathtub, the hot water supply device ends when the consumption of hot water in at least one heat consumption device is finished. Even if the water pressure in the tank rises, the pressure rise will not occur only in the hot water storage tank. As a result, the problem that the hot water storage tank breaks down due to water pressure can be avoided. In addition, since the hot water supplied to the bathtub is hot water after the temperature is adjusted by the hot water mixing device, even if hot water is supplied to the bathtub at a timing not intended by the user, the user is damaged. The possibility of reaching can be lowered.

Still another characteristic configuration of the hot water supply system according to the present invention is as follows:
The high-temperature water supply device includes:
A first inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank, or a second inflow state in which water flowing through the water supply channel is supplied to the heating device without passing through the hot water storage tank, or An inflow state switching device for switching to a third inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank and also supplied to the heating device without passing through the hot water storage tank; and
A first outflow state in which hot water stored in the hot water storage tank flows out to the hot water mixing device through the heating device, or hot water stored in the hot water storage tank without passing through the heating device. It has the outflow state switching device that switches to the second outflow state that flows out to the hot water mixing device .

According to the above characteristic configuration, the predetermined state switching device is provided on the inflow side and the outflow side. When the inflow state switching device switches to the first inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank, the pressure of the water supplied from the water supply channel is added to the hot water stored in the hot water storage tank. . As a result, the hot water stored in the hot water storage tank can be supplied to the hot water mixing device using the pressure of the water supplied from the water supply channel.
When the inflow state switching device switches to the second inflow state where the water flowing through the water supply channel is supplied to the heating device without going through the hot water storage tank, the hot water heated by the heating device is supplied from the water supply channel. The water pressure can be supplied to the hot water mixing device. Moreover, since the pressure of the water supplied from a water supply channel is not added to the hot water stored in the hot water storage tank, the problem that a hot water storage tank breaks down by the pressure of the water supplied from a water supply channel can also be avoided.
When the inflow state switching device switches to the third inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank and also supplied to the heating device without passing through the hot water storage tank, the hot water stored in the hot water storage tank In addition, by adding the pressure of the water supplied from the water supply channel, the hot water stored in the hot water storage tank can be supplied to the hot water mixing device using the pressure of the water supplied from the water supply channel and heated. Hot water after being heated by the apparatus can be supplied to the hot water mixing apparatus by using the pressure of the water supplied from the water supply channel.
In addition, according to the above characteristic configuration, when the outflow state switching device is switched to the first outflow state in which the hot water stored in the hot water storage tank flows out to the hot water mixing device via the heating device, the hot water storage tank The stored hot water can be supplied to the heat consuming device after the temperature is raised by the heating device. That is, even if the amount of heat stored in the hot water storage tank is small, sufficient heat can be supplied to the heat consuming device.
When the outflow state switching device is switched to the second outflow state in which hot water stored in the hot water storage tank flows out to the hot water mixing device without going through the heating device, the heating device does not raise the temperature of the hot water. Hot water stored in the hot water storage tank can be supplied to the heat consuming device.

  Still another feature of the hot water supply system according to the present invention is that the control device supplies hot water to the heat consuming device by supplying the hot water to the hot water mixing device via the hot water storage tank. When hot water is supplied to the heat consuming device by operating the water supply path switching device to flow water through the bypass passage and supplying the hot water to the hot water mixing device via the hot water storage tank. When the consumption of hot water in the heat consuming device is completed in a state where the water supply is switched, the water supply path switching device is operated so that water flows through the pressure reducing device.

According to the above characteristic configuration, the control device supplies the high-temperature water to the hot water mixing device via the hot water storage tank so that when the hot water is supplied to the heat consuming device, the water supply route flows the water through the bypass. Operate the switching device. That is, in a state where hot water is supplied to the heat consuming device by supplying high temperature water to the hot water mixing device via the hot water storage tank, hot water flows out to the heat consuming device via the hot water storage tank, The water pressure inside the hot water tank does not become very high. As a result, even if relatively high-pressure water that has passed through the bypass passage is supplied to the hot water storage tank, the problem that the hot water storage tank breaks down due to water pressure can be avoided, and a relatively high pressure is applied to the heat consuming device. High temperature water can be supplied.
In addition, the control device supplies the high-temperature water to the hot water mixing device via the hot water storage tank, and when the consumption of hot water in the heat consuming device is completed while hot water is supplied to the heat consuming device, the pressure reducing device The water supply path switching device is operated so that water flows through the water. That is, the pressure of the water supplied to the hot water storage tank can be relatively lowered. As a result, the problem that the hot water storage tank breaks down due to water pressure can be avoided.

It is a figure explaining roughly the composition of a hot-water supply system. It is a figure explaining the composition of a hot-water supply system concretely. It is a figure explaining the example of a path | route through which hot water flows. It is a figure explaining the example of a path | route through which hot water flows. It is a figure explaining the example of a path | route through which hot water flows. It is a figure explaining the example of a path | route through which hot water flows. It is a figure explaining the example of a path | route through which hot water flows. It is a figure explaining the example of a path | route through which hot water flows. It is a figure which illustrates concretely the composition of the hot-water supply system of another embodiment.

  The hot water supply system according to the present invention will be described below with reference to the drawings. FIG. 1 is a diagram schematically illustrating the configuration of a hot water supply system. As shown in the figure, the hot water supply system includes a hot water / water mixing device 13, a water supply channel 1, a decompression device 12, a bypass 9, a water supply route switching device 11, a high-temperature water supply device 20, and a control device C. The control device C controls the operation of the hot water / water mixing device 13, the water supply path switching device 11, and the high temperature water supply device 20.

  Water supplied from a water supply source 10 (for example, water supply equipment such as a water supply piping network or a water storage tank) is supplied to the high temperature water supply device 20 and the hot water mixing device 13 via the water supply channel 1. Water supplied from the water supply source 10 at a predetermined water supply pressure flows through the water supply channel 1. A decompression device 12 is provided in the middle of the water supply channel 1. The decompression device 12 is configured to reduce the pressure of water supplied from the upstream side with a predetermined water supply pressure and then flow it downstream. The decompression device 12 is configured using, for example, a decompression valve.

  Connected to the water supply path 1 is a bypass path 9 that bypasses the decompression device 12 and flows water. The water supply path switching device 11 provided in the middle of the water supply path 1 switches whether water flows through the decompression device 12 or water flows through the bypass path 9. In the example shown in FIG. 1, a water supply path switching device 11 is provided in the water supply path 1 upstream of the decompression device 12. Then, starting from the water supply path switching device 11, the bypass path 9 branches from the water supply path 1, and the bypass path 9 merges with the water supply path 1 at the junction 5 in the water supply path 1 on the downstream side of the decompression device 12. . The water supply path switching device 11 is configured using, for example, a three-way valve.

  The water supply channel 1 on the downstream side of the junction 5 is provided with a branching unit 6, and the water supply channel 1 is divided into two from the branching unit 6. One water supply channel 1 is connected to a high-temperature water supply device 20, and the other water supply channel 1 is supplied to a hot water mixing device 13.

  The high temperature water supply device 20 is connected to the water supply channel 1 on the downstream side of the decompression device 12 and the bypass channel 9, and uses the pressure of the water supplied from the water supply channel 1 to supply high temperature water to the hot water mixing device 13. Supply. The high-temperature water supply device 20 and the heat consuming device 14 are connected by the tap water passage 2, and a hot water mixing device 13 is provided in the middle of the tap water passage 2. The high temperature water supply device 20 includes a hot water storage tank 21 that stores hot water as high temperature water, and a heating device 22 that heats hot water stored in the hot water storage tank 21 or water supplied from the water supply path 1 to generate high temperature water. .

  The heating device 22 is configured by using various types of devices such as a combustion water heater that uses the combustion heat of fuel such as gas, an electric water heater, a natural refrigerant heat pump water heater, and a solar heat collector. Is done. Alternatively, a fuel cell or a combined heat and power supply device that includes an engine and a generator driven by the engine and uses the exhaust heat of the engine and the generated power of the generator is used as the heating device 22. You can also. Alternatively, the heating device 22 may include a separate heat and power supply device and an auxiliary heat source device such as a combustion water heater. And then. The heating device 22 is a type capable of heating hot water stored in the hot water storage tank 21 as a heating target, a type capable of heating water supplied from the water supply channel 1 as a heating target, hot water stored in the hot water storage tank 21, and It can be configured in various types such as a type that can heat both water supplied from the water supply channel 1 as a heating target. Further, the heating device 22 performs a hot water storage operation in which hot water (hot water) heated and heated is stored in the hot water storage tank 21, and hot water (high temperature water) heated and heated without passing through the hot water storage tank 21. It is possible to configure various types, such as a type that performs a hot water supply operation for feeding to the hot water supply passage 2 and a type that can perform both a hot water storage operation and a hot water supply operation.

  In the hot water storage tank 21, as shown in FIG. 2, * hot water is stored so as to form a temperature stratification. That is, relatively hot water is stored on the upper side, and relatively low temperature hot water is stored on the lower side. On the side of the hot water storage tank 21, temperature sensors T1 to T4 are provided from the upper side to the lower side. The detection results of these temperature sensors T1 to T4 are transmitted to the control device C. For example, if the temperature of hot water detected by all of the temperature sensors T1 to T4 is high, the control device C can determine that the hot water storage tank 21 is full of hot water. Conversely, when only the temperature sensor T1 detects high temperature hot water and the temperature sensors T2 to T4 detect low temperature hot water, only the hot water in the range detected by the temperature sensor T1 is high. That is, it can be determined that the amount of heat stored in the hot water storage tank 21 is small.

  The hot water mixing device 13 mixes relatively high temperature high temperature water and relatively low temperature low temperature water to produce hot water at a set temperature to be supplied to the heat consuming device 14. In the present embodiment, high temperature water is supplied from the high temperature water supply device 20 to the hot water mixing device 13, and low temperature water is supplied from the water supply channel 1 to the hot water mixing device 13. The hot water mixing device 13 is configured using, for example, a mixing valve. Then, the control device C refers to the detection result of the temperature sensor T5 provided in the hot water outlet 2 downstream of the hot water / water mixing device 13, and the temperature of the hot water produced by the hot water / water mixing device 13 is changed to the heat consuming device 14. The operation of the hot and cold water mixing device 13 is controlled so that the set temperature is supplied to the hot water. The heat consuming apparatus 14 is, for example, a hot water supply application, a bath hot water application (that is, a bathtub), and the like.

  The information input / output device 19 shown in FIG. 1 is a remote control device provided in, for example, a kitchen or bathroom in a general home. The information input / output device 19 can be used to input a set temperature of the heat consuming device 14 (temperature of hot water for hot water supply, temperature of hot water for bathing, etc.).

  As described above, in the present embodiment, the high temperature water supply device 20 is configured to supply high temperature water to the hot water mixing device 13 using the pressure of the water supplied from the water supply channel 1. Then, the control device C supplies hot water to the hot water mixing device 13 via the hot water storage tank 21 so that hot water is supplied to the heat consuming device 14 so that water flows through the bypass passage 9. The switching device 11 is operated. That is, in a state in which high temperature water is supplied to the hot water mixing device 13 via the hot water storage tank 21, the pressure of the water supplied through the water supply channel 1 and the bypass channel 9 (that is, not through the decompression device 12) is Although it is added to the hot water in the hot water storage tank 21, there is also hot water that has escaped from the hot water storage tank 21. Therefore, the water pressure inside the hot water storage tank 21 does not become very large, and the problem that the hot water storage tank 21 is damaged by the water supply pressure does not occur.

  In addition, if the high temperature water which escapes from the hot water storage tank 21 does not exist, the pressure added to the hot water inside the hot water storage tank 21 will rise. For this reason, the control device C supplies hot water to the hot water mixing device 13 via the hot water storage tank 21, thereby ending consumption of hot water in the heat consumption device 14 while hot water is being supplied to the heat consumption device 14. When doing so, the water supply path switching device 11 is operated so that water flows through the decompression device 12. For example, the control device C refers to the detection result of the flow sensor 18 provided in the middle of the tap water passage 2 (the tap water passage 2 between the hot water mixing device 13 and the heat consuming device 14 in FIG. 1), and the tap water passage. When the flow rate of hot water in 2 decreases, it can be determined that it is the timing when consumption of hot water in the heat consuming device 14 ends. Alternatively, when the user instructs the information input / output device 19 to end consumption of hot water, the control device C can determine that it is time to end consumption of hot water in the heat consumption device 14. And if it judges with the control apparatus C being the timing when consumption of the hot water in the heat consuming apparatus 14 is complete | finished, the water supply path | route switching apparatus 11 will be operated so that water may flow through the decompression device 12. As a result, the pressure of the water after being depressurized by the decompression device 12 is added to the hot water in the hot water storage tank 21, so that the water pressure in the hot water storage tank 21 does not become very large. There is no problem of breakage.

  Next, the configuration of the hot water supply system will be specifically described with reference to FIG. The hot water supply system shown in FIG. 2 is an example in which the hot water supply system shown in FIG. 1 is embodied, and the same components as those shown in FIG. 1 are denoted by the same reference numerals in FIG.

A pressure reducing valve 12 as a pressure reducing device is provided in the middle of the water supply channel 1. Connected to the water supply channel 1 is a bypass channel 9 that bypasses the pressure reducing valve and flows water. Whether water is allowed to flow through the pressure reducing valve 12 or whether water is allowed to flow through the bypass path 9 is switched by a three-way valve (an example of a water supply path switching device) 11 provided at a branch portion between the water supply path 1 and the bypass path 9. The operation of the three-way valve 11 is controlled by the control device C.
The water supply path 1 is bifurcated at a branching section 6 located downstream of the merge section 5 where the bypass path 9 joins the water supply path 1, and one of the water supply paths 1 a ( 1) and the other is the water supply channel 1b (1) leading to the high temperature water supply device 20.

  Water is supplied to the high-temperature water supply device 20 via the water supply channel 1b. Also, hot water (high temperature water) is supplied from the high temperature water supply device 20 to the mixing valve 13 via the hot water outlet 2.

  Inside the high-temperature water supply device 20, a hot water storage tank 21 and a water heater 22A (22) as the heating device 22 are connected in combination with several flow paths. A water heater 22A as the heating device 22 shown in FIG. 2 is a combustion type water heater. The water supply path 1 b led to the inside of the high-temperature water supply device 20 is connected to the three-way valve 17, and the three-way valve 17 leads to the water supply path 1 b leading to the hot water storage tank 21 and the junction 7 of the connection path 3 and the heating path 4. Branches to the water supply channel 1c (1). The three-way valve 17 includes a first inflow state in which water flowing through the water supply channel 1 b is supplied to the hot water storage tank 21, and a water heater 22 A that passes through the water supply channel 1 c without passing through the hot water storage tank 21. And the third inflow supplied to the water heater 22A through the water supply channel 1c without passing through the hot water storage tank 21 and the water flowing in the water supply channel 1b is supplied to the hot water storage tank 21. It functions as an inflow state switching device that switches between states. The control device C controls the switching operation of the three-way valve 17.

  A three-way valve 15 and a merging portion 8 are sequentially positioned in the middle of the hot water supply path 2 from the hot water storage tank 21 to the mixing valve (hot water mixing apparatus) 13. In the three-way valve 15, the connection path 3 branches from the hot water supply path 2. The three-way valve 15 causes the hot water stored in the hot water storage tank 21 to flow out to the mixing valve 13 via the water heater 22A (that is, via the connection path 3, the heating path 4, and the junction 8). In the first outflow state, the hot water stored in the hot water storage tank 21 does not pass through the water heater 22A (that is, does not pass through the connection path 3 and the heating path 4), and passes through the junction 8 to the mixing valve 13. It functions as the outflow state switching device 15 that switches the second outflow state to flow out. In the middle of the connection path 3, a check valve 24 that prevents hot water from flowing from the junction 7 to the three-way valve 15 is provided. The control device C controls the switching operation of the three-way valve 15.

  A tapping water proportional valve 16 is provided in the tapping channel 2 on the downstream side of the mixing valve (hot water mixing device) 13. The hot water outlet 2 downstream of the hot water proportional valve 16 branches into a hot water outlet 2a (2) and a hot water outlet 2b (2). That is, a plurality of heat consuming devices 14 including a bathtub are connected in parallel via the tap water proportional valve 16 on the downstream side of the mixing valve (hot water mixing device) 13. For example, the hot water supply path 2a is a flow path for supplying hot water to a hot water supply application (an example of the heat consumption apparatus 14), and the hot water supply path 2b is a flow path for supplying hot water to a bath replenishment application (a bathtub as the heat consumption apparatus 14). It is. A flow sensor 18 is provided in the middle of the hot water outlet 2a. As a result, the control device C can determine the use state of the hot water in the hot water supply application with reference to the detection result of the flow sensor 18. A pouring electromagnetic valve 25 whose operation is controlled by the control device C is provided in the middle of the hot water supply passage 2b, and is always closed when hot water is not supplied to the bath replenishment application.

Next, with reference to FIGS. 3 to 8, a route through which the hot water flows will be described with a specific example.
FIG. 3 is a diagram illustrating an example of a path through which hot water flows immediately after supply of hot water to the heat consuming device 14 is started. In this state, the flow of hot water from the high temperature water supply device 20 to the heat consuming device 14 is not smooth, and a relatively large water pressure is applied to the inside of the hot water storage tank 21. Therefore, the control device C controls the three-way valve 11 so that the entire amount of hot water supplied from the water supply source 10 flows through the pressure reducing valve so that the water pressure inside the hot water storage tank 21 does not become very large. Thereby, the problem that the hot water storage tank 21 breaks down by water pressure can be avoided.

  In the example shown in FIG. 3, since hot water is sufficiently stored in the hot water storage tank 21, all hot water discharged from the high temperature water supply device 20 to the hot water outlet 2 is sent from the hot water storage tank 21. The That is, the control device C operates the three-way valve 17 as the inflow state switching device to the first inflow state where the water flowing through the water supply channel 1b is supplied to the hot water storage tank 21, and the three-way valve 15 as the outflow state switching device. The hot water stored in the hot water storage tank 21 does not pass through the water heater 22A (that is, does not pass through the connection path 3 and the heating path 4), passes through the junction 8 and has a mixing valve (hot water mixing apparatus) 13. To the second outflow state.

  FIG. 4 is a diagram illustrating an example of a route through which hot water flows after a lapse of time since the supply of hot water to the heat consuming device 14 is started. In this state, the flow of hot water from the high-temperature water supply device 20 to the heat consuming device 14 is smooth, and no large water pressure is applied to the inside of the hot water storage tank 21. For example, when the set time elapses after the supply of hot water to the heat consuming device 14 is started or when the flow rate detected by the flow rate sensor 18 exceeds the set flow rate, the control device C shows in FIG. The route example can be switched to the route example shown in FIG. Alternatively, when the user instructs the information input / output device 19 that there is no sudden water stop or flow rate fluctuation in the heat consuming device 14 (for example, a “continuous hot water supply” button or the like is If it is provided and it is turned ON), the control device C can determine that it is time to switch from the route example shown in FIG. 3 to the route example shown in FIG. Then, the control device C operates the three-way valve 11 so that the entire amount of hot water supplied from the water supply source 10 flows through the bypass passage 9 so that hot water with a relatively high water pressure is supplied to the heat consuming device 14. I have control. By performing such control, when hot water stored in the hot water storage tank 21 is supplied for hot water use such as a shower, it can be supplied at a relatively high water pressure, which is convenient for the user and satisfying the user. Can be obtained.

  Also in the example shown in FIG. 4, similarly to the case of FIG. 3, the control device C uses the three-way valve 17 as the inflow state switching device to supply the first inflow in which the water flowing through the water supply channel 1 b is supplied to the hot water storage tank 21. The three-way valve 15 as the outflow state switching device is operated in a state, and the hot water stored in the hot water storage tank 21 is not passed through the water heater 22A (that is, not via the connection path 3 and the heating path 4). The second outflow state is caused to flow through the junction 8 to the mixing valve (hot water mixing device).

  FIG. 5 is a diagram illustrating an example of a path through which hot water flows in a state where supply of hot water to the heat consuming device 14 is completed. For example, the control device C can detect that the flow rate of the hot water in the hot water flow path 2a has ended with reference to the detection result of the flow sensor 18 provided in the middle of the hot water flow path 2a. Alternatively, when the user instructs the information input / output device 19 to end consumption of hot water, the control device C can determine that it is time to end consumption of hot water in the heat consumption device 14. And the control apparatus C complete | finishes consumption of the hot water in the heat consumption apparatus 14 in the state in which the hot water is supplied to the heat consumption apparatus 14 by supplying high temperature water to the mixing valve 13 via the hot water storage tank 21. At this time, the three-way valve 17 is operated to the third inflow state. That is, the control device C increases the pressure inside the high temperature water supply device 20 (the pressure inside the hot water storage tank 21) that occurs when the amount of hot water discharged from the high temperature water supply device 20 decreases to zero. In order to mitigate (rising), the three-way valve 17 serving as an inflow state switching device is connected to the water heater 22A through the water supply channel 1c without passing through the hot water storage tank 21 while water flowing through the water supply channel 1b is supplied to the hot water storage tank 21. The third inflow state is also supplied. Or although illustration is abbreviate | omitted, the control apparatus C supplies the high temperature water to the mixing valve 13 via the hot water storage tank 21, and in the state where the hot water is supplied to the heat consuming apparatus 14, When the consumption of hot water is completed, the three-way valve 17 may be operated to the second inflow state. By such control, the water pressure supplied from the water supply source 10 is distributed to the water supply channel 1c. As a result, the pressure inside the hot water storage tank 21 can be prevented from becoming very large.

  Further, the control device C opens the pouring electromagnetic valve 25 provided in the middle of the tap water passage 2b and increases the amount of hot water supplied from the tap water proportional valve 16 to the tap water passage 2b side to the bathtub ( That is, the hot water is allowed to flow out to the hot water outlet 2b. That is, the control device C supplies high temperature water to the mixing valve (hot water mixing device) 13 via the hot water storage tank 21, so that at least one heat consumption device (for example, a tub other than the bathtub among the plurality of heat consumption devices 14). When hot water is supplied to the hot water supply application), the three-way valve (water supply path switching device) 11 is operated so that water flows through the bypass path 9. In addition, the control device C supplies hot water to the at least one heat consuming device (for example, hot water use) by supplying high temperature water to the mixing valve (hot water mixing device) 13 via the hot water storage tank 21. Then, when consumption of hot water in the at least one heat consuming device (for example, for hot water supply) is completed, the pouring electromagnetic valve 25 and the hot water proportional valve 16 are operated so that hot water is supplied to the bathtub. By such control, the water pressure of the water supplied from the water supply source 10 is also distributed to the hot water outlet 2b (tub). As a result, the pressure inside the hot water storage tank 21 can be prevented from becoming very large.

  FIG. 6 is a diagram illustrating an example of a path through which hot water flows in a state where a sufficient amount of heat is not stored in the hot water storage tank 21. As described above, the control device C refers to the detection results of the temperature sensors T1 to T4 provided in the hot water storage tank 21 to derive the heat storage amount in the hot water storage tank 21, that is, inside the hot water storage tank 21. It is possible to determine whether or not a sufficient amount of heat is stored. In this case, the control device C causes the three-way valve 15 as the outflow state switching device to pass hot water stored in the hot water storage tank 21 via the water heater 22A (that is, the connection path 3, the heating path 4, and the junction 8). To the first spill state that flows out to the mixing valve 13. In addition, the control device C heats the water heater 22A. As a result, the hot water discharged from the hot water storage tank 21 is heated by the water heater 22A via the connection path 3, the heating path 4, and the junction 8, and then supplied to the mixing valve 13 as a hot water mixing apparatus. Is done.

  FIG. 7 is a diagram illustrating an example of a path through which hot water flows in a state where the amount of heat stored in the hot water storage tank 21 is further reduced. In this case, the control device C causes the three-way valve 15 as the outflow state switching device to pass hot water stored in the hot water storage tank 21 via the water heater 22A (that is, the connection path 3, the heating path 4, and the junction 8). And the three-way valve 17 as an inflow state switching device is supplied to the hot water storage tank 21 while the hot water storage tank 21 is supplied with water flowing through the water supply channel 1b. It is made to operate | move to the 3rd inflow state supplied also to water heater 22A through the water supply path 1c, without passing through.

  FIG. 8 is a diagram illustrating an example of a path through which hot water flows in a state where hot water is supplied from the high-temperature water supply device 20 to the heat consuming device 14 without using hot water stored in the hot water storage tank 21. In this case, the control device C uses the three-way valve 17 as the inflow state switching device for the second inflow in which the water flowing through the water supply channel 1b is supplied to the water heater 22A through the water supply channel 1c without passing through the hot water storage tank 21. Operate to the state.

  As described above, the hot water supply system of the present embodiment supplies high-pressure hot water to the heat consuming device 14 using hot water supplied from the high-temperature water supply device 20 having the hot water storage tank 21 and the heating device 22 for storing hot water. In addition to being able to be supplied, even if the pressure of the water supplied from the water supply source 10 is high, it is possible to avoid the problem that the high-temperature water supply device 20 fails due to the pressure.

<Another embodiment>
<1>
In the above embodiment, an example in which the water supply path switching device 11 is configured using a three-way valve has been described, but the water supply path switching device 11 can also be configured using other devices. FIG. 9 is a diagram for specifically explaining the configuration of a hot water supply system according to another embodiment. In this hot water supply system, the water supply path switching device 11 is configured using an electromagnetic valve (open / close valve) 23 provided in the bypass path 9.
When the control device C operates the electromagnetic valve 23 (11) in the closed state, the water flowing through the water supply channel 1 cannot flow through the bypass channel 9, but flows through the pressure reducing valve 12. On the other hand, when the control device C operates the electromagnetic valve 23 (11) in the open state, the water flowing through the water supply channel 1 flows through the bypass channel 9 having a resistance smaller than that of the pressure reducing valve 12. In this way, the control device C can switch using the electromagnetic valve 23 (11) whether water flows through the pressure reducing valve 12 or water flows through the bypass 9.

<2>
In the above-described embodiment, the control device C supplies water via the bypass path 9 (for example, in FIGS. 4 to 8) only when high-temperature water is supplied to the shower as the heat consuming device 14. (Hot water supply as shown) may be performed, and in other cases, control may be performed such that water is supplied via the decompression device 12. Specifically, when the user performs execution or reservation for bathing and bathing in a bathtub as an example of the heat consuming device 14 using the information input / output device 19, the control device C It is determined that the hot water supply within a predetermined period after the execution is completed is heat consumption in the shower. For example, when the control device C completes the bath hot water filling at 19:00, the hot water supply in the shower time zone (from 19:00 to 22:00) for 3 hours (predetermined period) is due to heat consumption in the shower. Judge that there is. Then, when the flow rate sensor 18 detects the hot water supply flow rate during the shower time period, the controller C determines that heat consumption has occurred in the shower, and performs hot water supply as shown in FIGS. . On the other hand, the control device C performs control such that the water supply path switching device 11 supplies water via the pressure reducing device 12 in a time zone other than the shower time zone.

<3>
In the above embodiment, the hot water storage tank 21 and the heating device 22 are illustrated as being included in one high temperature water supply device 20, but the hot water storage tank 21 and the heating device 22 may be installed in separate systems. Good. If the hot water storage tank 21 and the heating device 22 can be operated as the high-temperature water supply device 20 under the control of the control device C, there is no limitation on the classification of packages with actual products.

  INDUSTRIAL APPLICABILITY The present invention can be used in a hot water supply system capable of supplying high-pressure hot water to a heat consuming device using hot water supplied from a high-temperature water supply device having a hot water storage tank for storing hot water and a heating device.

DESCRIPTION OF SYMBOLS 1 Water supply path 2 Hot water supply path 9 Bypass path 10 Water supply source 11 Three-way valve (Water supply path switching device)
12 Pressure reducing device (pressure reducing valve)
13 Hot water mixing device (mixing valve)
14 Heat consumption device 15 Three-way valve (outflow state switching device)
16 Hot water proportional valve (proportional valve)
17 Three-way valve (Inflow state switching device)
18 Flow sensor 19 Information input / output device 20 High temperature water supply device 21 Hot water storage tank 22 Heating device 22A Water heater 25 Pouring solenoid valve C Control device

Claims (5)

A hot and cold water mixing device for mixing hot water with relatively high temperature and low temperature water with relatively low temperature to produce hot water at a set temperature to be supplied to the heat consuming device;
A water supply channel through which water supplied at a predetermined water supply pressure from a water supply source flows;
A pressure reducing device that is provided in the middle of the water supply channel and that flows to the downstream side after reducing the pressure of water supplied from the upstream side at the predetermined water supply pressure;
A bypass for bypassing the pressure reducing device and flowing water;
A water supply path switching device for switching whether to flow water to the decompression device or to flow water to the bypass path;
A high-temperature water supply device that is connected to the water supply channel on the downstream side of the decompression device and the bypass channel and supplies the high-temperature water to the hot-water mixing device using the pressure of water supplied from the water supply channel When,
A controller for controlling the operation of the hot and cold water mixing device, the water supply path switching device and the high temperature water supply device,
The high temperature water supply device includes a hot water storage tank that stores hot water as the high temperature water, and a heating device that generates the high temperature water by heating hot water stored in the hot water storage tank or water supplied from the water supply channel. And
The high-temperature water supply device includes:
A first inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank, or a second inflow state in which water flowing through the water supply channel is supplied to the heating device without passing through the hot water storage tank, or An inflow state switching device for switching to a third inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank and also supplied to the heating device without passing through the hot water storage tank; and
A first outflow state in which hot water stored in the hot water storage tank flows out to the hot water mixing device through the heating device, or hot water stored in the hot water storage tank without passing through the heating device. An outflow state switching device that switches to a second outflow state that causes the hot water and water mixing device to flow out;
When the hot water is supplied to the heat consuming device by supplying the high temperature water to the hot water mixing device via the hot water storage tank, the control device causes the water to flow through the bypass passage. Operate the switching device,
When the consumption of hot water in the heat consuming device ends when hot water is supplied to the heat consuming device by supplying the hot water to the hot water mixing device via the hot water storage tank, the inflow state A hot water supply system for operating a switching device in the second inflow state or the third inflow state. A plurality of the heat consuming devices including a bathtub are connected in parallel via a proportional valve on the downstream side of the hot water / water mixing device,
The controller supplies hot water to at least one heat consuming device other than the bathtub among the plurality of heat consuming devices by supplying the hot water to the hot water mixing device via the hot water storage tank. The water supply path switching device is operated so that water flows through the bypass path,
Consumption of hot water in the at least one heat consuming device is completed in a state where hot water is supplied to the at least one heat consuming device by supplying the high temperature water to the hot water mixing device via the hot water storage tank. The hot water supply system according to claim 1, wherein the proportional valve is operated so that hot water is supplied to the bathtub. A hot and cold water mixing device for mixing hot water with relatively high temperature and low temperature water with relatively low temperature to produce hot water at a set temperature to be supplied to the heat consuming device;
A water supply channel through which water supplied at a predetermined water supply pressure from a water supply source flows;
A pressure reducing device that is provided in the middle of the water supply channel and that flows to the downstream side after reducing the pressure of water supplied from the upstream side at the predetermined water supply pressure;
A bypass for bypassing the pressure reducing device and flowing water;
A water supply path switching device for switching whether to flow water to the decompression device or to flow water to the bypass path;
A high-temperature water supply device that is connected to the water supply channel on the downstream side of the decompression device and the bypass channel and supplies the high-temperature water to the hot-water mixing device using the pressure of water supplied from the water supply channel When,
A controller for controlling the operation of the hot and cold water mixing device, the water supply path switching device and the high temperature water supply device,
The high temperature water supply device includes a hot water storage tank that stores hot water as the high temperature water, and a heating device that generates the high temperature water by heating hot water stored in the hot water storage tank or water supplied from the water supply channel. And
A plurality of the heat consuming devices including a bathtub are connected in parallel via a proportional valve on the downstream side of the hot water / water mixing device,
The controller supplies hot water to at least one heat consuming device other than the bathtub among the plurality of heat consuming devices by supplying the hot water to the hot water mixing device via the hot water storage tank. The water supply path switching device is operated so that water flows through the bypass path,
Consumption of hot water in the at least one heat consuming device is completed in a state where hot water is supplied to the at least one heat consuming device by supplying the high temperature water to the hot water mixing device via the hot water storage tank. A hot water supply system that operates the proportional valve so that hot water is supplied to the bathtub. The high-temperature water supply device includes:
A first inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank, or a second inflow state in which water flowing through the water supply channel is supplied to the heating device without passing through the hot water storage tank, or An inflow state switching device for switching to a third inflow state in which water flowing through the water supply channel is supplied to the hot water storage tank and also supplied to the heating device without passing through the hot water storage tank; and
A first outflow state in which hot water stored in the hot water storage tank flows out to the hot water mixing device through the heating device, or hot water stored in the hot water storage tank without passing through the heating device. The hot-water supply system of Claim 3 which has an outflow state switching apparatus which switches to the 2nd outflow state made to flow out to the said hot-water mixing apparatus. When the hot water is supplied to the heat consuming device by supplying the high temperature water to the hot water mixing device via the hot water storage tank, the control device causes the water to flow through the bypass passage. Operate the switching device,
When the consumption of hot water in the heat consuming device ends when hot water is supplied to the heat consuming device by supplying the high temperature water to the hot water mixing device via the hot water storage tank, the pressure reducing device The hot water supply system according to any one of claims 1 to 4, wherein the water supply path switching device is operated so that water flows through the water supply path.

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