JP2021139524A - Hot water supply system, hot water supply device, and method of controlling hot water supply system - Google Patents

Abstract

To provide a hot water supply system capable of raising the temperature in a bathtub up to a desired temperature before a person soaks in the bathtub.SOLUTION: A hot water supply system 100 according to one embodiment of the present invention comprises: a bathtub 2 in which bath water is collected; a heat exchanger 15 for bath which raises the temperature of the bath water; a bathtub return temperature sensor 1 which detects the temperature of the bath water; person-in-undressing room detection means 81 which detects a person being in an undressing room 300; and a control part 43 which controls the heat exchanger 15 for bath. The control part 43 is configured to: raise, when acquiring information indicating a determination on presence of a person in the undressing room 300 from the person-in-undressing room detection means 81, the temperature of the bath water by the heat exchanger 15 if the temperature of the bath water acquired from the bathtub return temperature sensor 18 becomes lower than a predetermined first threshold temperature; and not raise, when acquiring information indicating a determination on absence of a person in the undressing room 300 from the person-in-undressing room detection means 81, the temperature of the bath water by the heat exchanger 15 for bath.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a hot water supply system, a hot water supply device, and a control method for the hot water supply system.

As a conventional hot water supply device, for example, as in Patent Document 1, a hot water storage tank that stores water heated by a heating means (corresponding to the heat pump unit of Patent Document 1) and a high temperature stored in the upper part of the hot water storage tank. A hot water supply device that sends water to a bathtub is known.

Further, the hot water supply device described in Patent Document 1 detects a bath heating means for performing a reheating operation for heating the hot water in the bathtub, a temperature detecting means in the bathtub for detecting the temperature of the hot water in the bathtub, and a person in the bathroom. It has a person detecting means, and when the person detecting means detects a person, the reheating operation is started before the temperature detecting means in the bathtub detects the temperature of the hot water, and the person detecting means does not detect the person. In that case, the reheating operation is started after the temperature detecting means in the bathtub detects the temperature of the hot water. Further, the water heater described in Patent Document 1 is controlled to lengthen the interval of hot water temperature monitoring operation when the person detecting means does not detect a person as compared with the case where the person detecting means detects a person. Control is performed to lower the reheating start temperature.

Japanese Unexamined Patent Publication No. 2010-210227

The hot water supply device of Patent Document 1 detects a person in the bathroom where the bathtub is installed, and then switches the control. In addition, the person who enters the bathroom is already ready to take a bath such as undressing, and may be immersed in the bathtub immediately after the person enters the bathroom. Therefore, in the hot water supply device of Patent Document 1 in which the control is switched after detecting a person in the bathroom, it may not be possible to raise the temperature of the hot water in the bathtub to a desired temperature before the person is immersed in the bathtub.

An object of the present disclosure is to obtain a hot water supply system, a hot water supply device, or a control method of a hot water supply system capable of raising the temperature of hot water in a bathtub to a desired temperature before a person is immersed in the bathtub.

The hot water supply system according to one aspect of the present disclosure includes a bath water temperature raising means for raising the temperature of the bath water stored in the bath water, a bath water temperature detecting means for detecting the temperature of the bath water, and a bathroom in which the bath water is arranged. The undressing room person detection means that detects the information that determines whether or not a person is present in the undressing room adjacent to the bath water temperature detection means, the bath water temperature information from the bath water temperature detection means, and the undressing room person detection means It is equipped with a control unit that acquires information to determine whether or not a person is present in the room and controls the bath water temperature rising means, and the control unit performs control based on the information acquired from the undressing room person detecting means. For control based on the information acquired from the undressing room person detecting means, the bath water temperature is detected when the control unit acquires information from the undressing room person detecting means to determine that a person is present in the undressing room. Control to raise the temperature of the bath water by the bath water temperature raising means when the temperature of the bath water obtained from the means becomes lower than the predetermined first threshold temperature, and the control unit from the undressing room person detecting means When the information that it is judged that no person is not present in the dressing room is acquired, the bath water temperature is not increased by the bath water temperature raising means, or the bath water temperature obtained from the bath water temperature detecting means is the first. This includes control of raising the temperature of the bath water by means for raising the temperature of the bath water when the temperature becomes lower than the second threshold temperature set to a value lower than the threshold temperature of.

The hot water supply device according to one aspect of the present disclosure includes a bath water temperature raising means for raising the temperature of bath water stored in a bathtub arranged in a bathroom, and a person is present in a dressing room adjacent to the bathroom. Sometimes, when the temperature of the bath water becomes lower than the predetermined first threshold temperature, the temperature of the bath water is raised by means for raising the bath water temperature, and when no person is present in the dressing room, the bath water temperature rises. The temperature of the bath water is not raised by the means, or the temperature of the bath water is raised by the means for raising the temperature of the bath water when the temperature of the bath water becomes lower than the second threshold temperature set to a value lower than the first threshold temperature. To raise.

The control method of the hot water supply system according to one aspect of the present disclosure includes a first step of determining whether or not a person is present in a dressing room adjacent to a bathroom in which a bathtub is arranged, and a first step of undressing. When it is determined that a person is present in the room and the temperature of the bath water stored in the bath water becomes lower than the predetermined first threshold temperature, the temperature of the bath water is raised by the bath water temperature raising means. In the second step of raising the temperature, and when it is determined in the first step that no one is present in the dressing room, the bath water temperature is not raised by the bath water temperature raising means, or the bath water temperature is the first. A third step of raising the temperature of the bath water by means for raising the temperature of the bath water when the temperature becomes lower than the second threshold temperature set to a value lower than the threshold temperature is provided.

The hot water supply system, the hot water supply device, and the control method of the hot water supply system according to one aspect of the present disclosure can raise the temperature of the bath water when a person enters the dressing room preparing to take a bath, and the person is immersed in the bathtub. It has the effect of raising the temperature of hot water in the bathtub to a desired temperature.

It is the schematic of the hot water supply system which concerns on Embodiment 1. FIG. It is the schematic of the hot water supply device which concerns on Embodiment 1. FIG. It is the schematic at the time of the boiling operation of the hot water supply device which concerns on Embodiment 1. FIG. It is the schematic at the time of the hot water filling operation of the hot water supply device which concerns on Embodiment 1. FIG. It is the schematic at the time of the reheating operation of the hot water supply device which concerns on Embodiment 1. FIG. It is a flowchart of the control after hot water filling in the hot water supply system which concerns on Embodiment 1. FIG. It is the schematic at the time of the reheating operation of the hot water supply device which concerns on the 1st modification of Embodiment 1. FIG. It is a flowchart of the control after hot water filling of the hot water supply system which concerns on the 2nd modification of Embodiment 1. It is a flowchart of the hot water filling control in the hot water supply system which concerns on Embodiment 2. It is the schematic of the hot water supply system which concerns on Embodiment 3. FIG. It is a flowchart of the threshold temperature change control in the hot water supply system which concerns on Embodiment 3. It is a flowchart of the hot water filling temperature change control in the hot water supply system which concerns on Embodiment 4. FIG. It is a flowchart of the control at the time of bathing in the hot water supply system which concerns on Embodiment 5. It is a flowchart of the control at the time of bathing in the hot water supply system which concerns on Embodiment 6.

The hot water supply system, the hot water supply device, and the control method of the hot water supply system according to the embodiment of the present disclosure will be described with reference to the drawings. The present disclosure is not limited to the following embodiments, and can be modified or omitted without departing from the spirit of the present disclosure. Further, it is also possible to appropriately combine the configurations of the hot water supply system, the hot water supply device and the hot water supply system, and the additional configurations according to the respective embodiments and modifications. Further, common elements in each figure are designated by the same reference numerals, and duplicate description will be omitted.

Embodiment 1.
FIG. 1 is a schematic view of a hot water supply system according to the first embodiment. The hot water supply system 100 includes a hot water supply device 1, a bathtub 2, a bathtub going pipe 3, a bathtub return pipe 4, a first remote control device 5, a second remote control device 6, a bathroom air conditioner 7, and a dressing room. The air conditioner 8 and the external communication device 9 are provided. The hot water supply system 100 is installed in a building having a bathroom 200 and a dressing room 300. The dressing room 300 is adjacent to the bathroom 200. Further, the bathtub 2, the first remote controller 5, and the bathroom air conditioner 7 are arranged in the bathroom 200. Further, the dressing room air conditioner 8 is arranged in the dressing room 300.

FIG. 2 is a schematic view of the hot water supply device according to the first embodiment. Next, the hot water supply device 1 and the bathtub 2 will be described with reference to FIG. The hot water supply device 1 is a device that heats low-temperature water and boils it into high-temperature water to supply high-temperature water to the bathtub 2. The bathtub 2 stores water inside so that a person can take a bath. Here, the water stored in the bathtub 2 will be referred to as bath water in the following description. Further, one end of the bathtub going pipe 3 and one end of the bathtub returning pipe 4 are connected to the hot water supply device 1. The other end of the bathtub going pipe 3 and the other end of the bathtub returning pipe 4 are connected to the bathtub 2. Therefore, water can be circulated by the hot water supply device 1, the bathtub 2, the bathtub going pipe 3, and the bathtub returning pipe 4.

The hot water supply device 1 includes a heating unit 11, a hot water storage tank 12, a heat source pump 13, a bath circulation pump 14, a bath heat exchanger 15, a flow rate sensor 16, a bath going temperature sensor 17, and a bath returning temperature sensor. It includes 18, a water level sensor 19, and a flow switch 20.

The heating unit 11 heats water. As a means for the heating unit 11 to heat water, for example, a means for heating water by using a heat pump that circulates a refrigerant to transfer the heat of the atmosphere to water, a means for burning fuel such as gas, and heating the water by combustion heat. Examples thereof include means for heating water using an electric heater that generates heat when electric power is supplied, and means for collecting heat from the sun to heat water.

The hot water storage tank 12 stores water inside. The hot water storage tank 12 is provided with a plurality of inflow ports. In the hot water storage tank 12 of the first embodiment, the first tank upper inflow outlet 12a, the second tank upper inflow outlet 12b, the tank middle inflow outlet 12c, the first tank lower inflow outlet 12d, and the second A tank lower inflow port 12e and a third tank lower inflow port 12f are formed. The first tank upper inflow port 12a and the second tank upper inflow port 12b are the tank middle inflow port 12c, the first tank lower inflow port 12d, the second tank lower inflow port 12e, and the third tank lower inflow port. It is formed above 12f. Further, the tank central inflow port 12c is formed above the first tank lower inflow port 12d, the second tank lower inflow port 12e, and the third tank lower inflow port 12f.

The heat source pump 13 and the bath circulation pump 14 each send water to form a flow of water.

In the bath heat exchanger 15, two water channels, a first water channel and a second water channel, are formed inside, and between the water flowing through the first water channel and the water flowing through the second water channel. Have heat exchange performed. In the following description, when it is described that the bath heat exchanger 15 is controlled, the inflow / outflow amount of water flowing through the first water flow path or the inflow / outflow amount of water flowing through the second water flow path is controlled. It is shown that.

The flow rate sensor 16 detects the flow rate of water flowing into the bathtub 2. The bathtub going temperature sensor 17 detects the temperature of the water flowing into the bathtub 2. The bathtub return temperature sensor 18 detects the temperature of the bath water flowing out of the bathtub 2. The water level sensor 19 detects the pressure of the bath water flowing out of the bathtub 2, and measures the water level of the bath water stored in the bathtub 2 from the detected pressure. The flow switch 20 detects the flow of bath water flowing out of the bathtub 2.

Further, the heating unit 11, the hot water storage tank 12, and the bath heat exchanger 15 are connected via various pipes and various valves. Next, the piping and valves inside the hot water supply device 1 will be described. The hot water supply device 1 includes a pressure reducing valve 21, a first four-way valve 22, a second four-way valve 23, a three-way valve 24, a mixing valve 25, an electromagnetic valve 26, a first water supply pipe 27, and a first. The second water supply pipe 28, the tank lower water outlet pipe 29, the heating unit forward pipe 30, the heating unit return pipe 31, the bypass pipe 32, the first hot water pipe 33, and the second hot water pipe 34. The third hot water pipe 35, the fourth hot water pipe 36, the fifth hot water pipe 37, the hot water outlet pipe 38, the bath pipe 39, the hot water supply device inner bathtub going pipe 40, and the hot water supply device inner bathtub return pipe. 41 and a circulation pipe 42 are provided. The three-way valve 24 is a valve having three ports, a port, b port, and c port. The four-way valve is a valve having four ports, a port, b port, c port, and d port. The mixing valve 25 is provided with a first inlet, a second inlet, and an outlet, and is a valve that mixes the water flowing in from the first inlet and the water flowing in from the second inlet and discharges the water from the outlet.

One end of the first water supply pipe 27 is connected to a water source such as a water supply. The other end of the first water supply pipe 27 is connected to the first tank lower inflow port 12d. One end of the second water supply pipe 28 is connected in the middle of the first water supply pipe 27, and a branch point is formed at the connection point. The other end of the second water supply pipe 28 is connected to the second inlet of the mixing valve. Further, a pressure reducing valve 21 is provided between one end of the first water supply pipe 27 and the branch point. The pressure reducing valve 21 decompresses the water that has flowed into the hot water supply device 1 from the water source.

One end of the tank lower water outlet pipe 29 is connected to the second tank lower inflow port 12e. The other end of the tank lower water outlet pipe 29 is connected to the a port of the three-way valve 24.

One end of the heating unit forward pipe 30 is connected to the c port of the three-way valve 24. The other end of the heating unit forward pipe 30 is connected to the inflow port of the heating unit 11. One end of the heating unit return pipe 31 is connected to the outlet of the heating unit 11. The other end of the heating unit return pipe 31 is connected to the b port of the first four-way valve 22. One end of the bypass pipe 32 is connected in the middle of the heating unit going pipe 30, and a branch point is formed at the connection point. The other end of the bypass pipe 32 is connected to the a port of the first four-way valve 22. Further, a heat source pump 13 is provided between one end of the heating unit going pipe 30 and the branch point. The heat source pump 13 is provided so that water flows from one end of the heating unit going pipe 30 to the branch point.

One end of the first hot water pipe 33 is connected to the c port of the first four-way valve 22. The other end of the first hot water pipe 33 is connected to the third tank lower inflow port 12f. One end of the second hot water pipe 34 is connected to the d port of the first four-way valve 22. The other end of the second hot water pipe 34 is connected to the a port of the second four-way valve 23. One end of the third hot water pipe 35 is connected to the b port of the second four-way valve 23. The other end of the third hot water pipe 35 is connected to the first tank upper inflow port 12a. One end of the fourth hot water pipe 36 is connected to the d port of the second four-way valve 23. The other end of the fourth hot water pipe 36 is connected to the second tank upper inflow port 12b. One end of the fifth hot water pipe 37 is connected to the c port of the second four-way valve 23. The other end of the fifth hot water pipe 37 is connected to the tank middle inflow port 12c.

One end of the hot water outlet pipe 38 is connected in the middle of the fourth hot water pipe 36, and a branch point is formed at the connection point. The other end of the hot water outlet pipe 38 is connected to the first inlet of the mixing valve 25. One end of the bath pipe 39 is connected to the outlet of the mixing valve 25. The other end of the bath pipe 39 is connected to the solenoid valve 26. Further, a flow rate sensor 16 is provided in the middle of the bath pipe 39. That is, the flow rate sensor 16 detects the flow rate of water flowing through the bath pipe 39.

One end of the bathtub going pipe 40 in the water heater is connected to the solenoid valve 26. The other end of the bathtub going pipe 40 in the hot water supply device is connected to one end of the bathtub going pipe 3. One end of the bathtub return pipe 41 in the hot water supply device is connected to one end of the bathtub return pipe 4. The other end of the bathtub return pipe 41 in the hot water supply device is connected in the middle of the bathtub going pipe 40 in the hot water supply device, and a branch point is formed at the connection point. Further, a bathtub going temperature sensor 17 is provided between the branch point of the bathtub going pipe 40 in the hot water supply device and the other end. That is, the bathtub going temperature sensor 17 detects the temperature of the water flowing through the bathtub going pipe 40 in the hot water supply device. Further, a bath circulation pump 14, a second water flow path of the bath heat exchanger 15, a bathtub return temperature sensor 18, a water level sensor 19, and a flow switch 20 are provided in the middle of the bathtub return pipe 41 in the hot water supply device. The bathtub return temperature sensor 18 is provided on one end side of the bathtub return pipe 41 in the hot water supply device with respect to the second water flow path of the bath heat exchanger 15. That is, the bathtub return temperature sensor 18 detects the temperature of the water flowing out of the bathtub 2 before flowing into the bath heat exchanger 15. Further, the bath circulation pump 14 is provided in a direction in which water flows from one end of the bathtub return pipe 41 in the hot water supply device to the other end.

One end of the circulation pipe 42 is connected in the middle of the third hot water pipe 35, and a branch point is formed at the connection point. The other end of the circulation pipe 42 is connected to the b port of the three-way valve 24. Further, a first water flow path of the bath heat exchanger 15 is provided in the middle of the circulation pipe 42.

The hot water supply device 1 has a control unit 43. The control unit 43 controls the hot water supply device 1. Specifically, the control unit 43 in the first embodiment includes a heating unit 11, a heat source pump 13, a bath circulation pump 14, a first four-way valve 22, a second four-way valve 23, a three-way valve 24, a mixing valve 25, and a solenoid valve. 26 and is controlled. Further, since the flow rate of water flowing in and out of the bath heat exchanger 15 can be controlled by controlling the heat source pump 13 and the bath circulation pump 14, the control unit 43 can also control the bath heat exchanger 15.

In addition, the control unit 43 can acquire information including physical quantities detected or measured from various sensors provided in the hot water supply device 1. Specifically, the control unit 43 in the first embodiment can acquire information from the flow rate sensor 16, the bathtub going temperature sensor 17, the bathtub return temperature sensor 18, the water level sensor 19, and the flow switch 20. Further, as shown in FIG. 1, the control unit 43 is connected to the first remote controller 5, the second remote controller 6, the bathroom air conditioner 7, the undressing room air conditioner 8, and the external communication device 9 by wire or wirelessly so as to be able to communicate with each other. Will be done.

Further, the control unit 43 has a processor, a memory, a hardware interface, and a timer (not shown). The processor executes control or data processing of various controlled objects of the water heater 1. The processor is, for example, a CPU (Central Processing Unit). The memory stores various data used for the program or control for operating the processor. The memory is a non-volatile or volatile semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), or a flash memory. The hardware interface is connected to various sensors, a first remote controller 5, a second remote controller 6, a bathroom air conditioner 7, a dressing room air conditioner 8, and an external communication device 9 by wire or wireless communication. The hardware interface converts the control information generated by the processor into a control signal and transmits it, or receives a signal including information acquired by various sensors and converts it into a format that can be processed by the processor. The hardware interface is, for example, a wired or wireless interface. The timer measures the elapsed time from the start of any measurement.

Next, the bathtub 2 will be described. As shown in FIG. 2, a bathtub water inlet 2a and a bathtub water outlet 2b are formed in the bathtub 2. The other end of the bathtub going pipe 3 is connected to the bathtub water inlet 2a. The other end of the bathtub return pipe 4 is connected to the bathtub water outlet 2b.

The first remote control device 5 and the second remote control device 6 shown in FIG. 1 will be described. The first remote control device 5 and the second remote control device 6 include operation units 51 and 61 and notification units 52 and 62, respectively. The first remote control device 5 is installed in the bathroom, and the second remote control device 6 is installed in a place different from the bathroom and the dressing room, such as the kitchen. The second remote controller 6 may be a portable smartphone or tablet terminal.

The operation units 51 and 61 accept user operations such as operation operation commands and changes in set values. For example, the operation units 51 and 61 receive a command to start the hot water filling operation of filling the bathtub 2 or a change of the set value of the temperature of the hot water filled in the bathtub 2. Further, the operation units 51 and 61 accept an operation of selecting the bathroom air conditioner 7 or the dressing room air conditioner 8 constituting the hot water supply system 100. Examples of the operation units 51 and 61 include push buttons and touch panels.

The notification units 52 and 62 notify the user of information such as the operating status of the hot water supply system. The notification units 52 and 62 also notify information about the bathroom air conditioner 7 or the dressing room air conditioner 8 constituting the hot water supply system 100. Further, as a method of notifying the user by the notification unit 45, a method of outputting information in characters or symbols, a method of outputting information in sound or voice, and the like can be mentioned. Examples of the notification units 52 and 62 include a liquid crystal panel or a speaker.

The bathroom air conditioner 7 will be described. The bathroom air conditioner 7 harmonizes the air in the bathroom 200 by heating or dehumidifying the air in the bathroom 200. Examples of the bathroom air conditioner 7 include an electric heater type bath dryer or a heat pump type air conditioner.

The dressing room air conditioner 8 will be described. The dressing room air conditioner 8 harmonizes the air in the dressing room 300 by heating or dehumidifying the air in the dressing room 300. Examples of the dressing room air conditioner 8 include an electric heater type dressing room heater or a heat pump type air conditioner. Further, the dressing room air conditioner 8 is provided with the dressing room person detecting means 81. The dressing room person detecting means 81 detects information that is determined by the control unit 43 whether or not a person is present in the dressing room 300. Examples of the dressing room person detecting means 81 include various sensors such as an infrared sensor that detects the temperature distribution in the dressing room 300 with infrared rays and an illuminance sensor that detects the illuminance in the dressing room 300.

The external communication device 9 will be described. The external communication device 9 is communicably connected to an external line such as the Internet. That is, the control unit 43 can communicate with the external communication device 9 and the server outside the building via the external line.

Next, with reference to FIGS. 2 to 5, the flow of water in various operations of the hot water supply device 1 and the flow of water when water is supplied to the hot water storage tank 12 from the water source will also be described. The hot water supply device 1 is a boiling operation for boiling water in the hot water storage tank 12 to a high temperature depending on the state of the first four-way valve 22, the state of the second four-way valve 23, the state of the three-way valve 24, the mixing valve 25, and the solenoid valve 26. A hot water filling operation for supplying the water of the hot water storage tank 12 to the bathtub 2 and a reheating operation for heating the bath water can be performed.

First, the flow of water when water is supplied to the hot water storage tank 12 from the water source will be described with reference to FIG. The water from the water source passes through the first water supply pipe 27 and flows into the inside of the hot water storage tank 12 from the first tank lower inflow outlet 12d. Therefore, the water flowing into the hot water storage tank 12 from the water source is stored in the lower part of the hot water storage tank 12.

FIG. 3 is a schematic view of the hot water supply device according to the first embodiment during the boiling operation. In FIG. 3, the flow path through which water passes is shown by a thick line. Next, the flow of water in the boiling operation will be described with reference to FIG. In the boiling operation, the first four-way valve 22 communicates the b port and the d port and closes the a port and the c port. Further, the second four-way valve 23 is in a state where the a port and the b port are connected and the c port and the d port are closed. Further, the three-way valve 24 is in a state where the a port and the c port are communicated with each other and the b port is closed. Further, the state of the mixing valve 25 and the solenoid valve 26 may be any state.

When the heat source pump 13 operates, the low-temperature water stored in the lower part of the hot water storage tank 12 flows out from the second tank lower inflow port 12e in the boiling operation. The low-temperature water that has flowed out of the hot water storage tank 12 passes through the tank lower water outlet pipe 29 and the heating unit going pipe 30 and flows into the heating unit 11. The water that has flowed into the heating unit 11 is heated to become hot water and flows out of the heating unit 11. The high-temperature water flowing out of the heating unit 11 passes through the heating unit return pipe 31, the second hot water pipe 34, and the third hot water pipe 35, and flows into the inside of the hot water storage tank 12 from the first tank upper inflow outlet 12a. .. Therefore, the high-temperature water heated by the heating unit 11 is stored in the upper part of the hot water storage tank 12.

Generally, the higher the temperature, the lower the density of water, and the lower the temperature, the higher the density. Therefore, water from a water source having a relatively low temperature flows in from the lower part of the hot water storage tank 12, and high-temperature water heated by the heating unit 11 having a relatively high temperature flows in from the upper part of the hot water storage tank 12, so that the hot water storage tank 12 It is possible to form a temperature stratification inside the water having a high temperature on the upper side and a low temperature on the lower side.

FIG. 4 is a schematic view of the hot water supply device according to the first embodiment during hot water filling operation. In FIG. 4, the flow path through which water passes is shown by a thick line. Next, the flow of water in the hot water filling operation will be described with reference to FIG. In the hot water filling operation, the mixing valve 25 is in a state in which water flows in from the first inlet and the second inlet and water flows out from the outlet. Further, the solenoid valve 26 is in an open state.

In the hot water filling operation, the high-temperature water stored in the upper part of the hot water storage tank 12 flows out from the second tank upper inflow outlet 12b. The water flowing out of the hot water storage tank 12 passes through the hot water outlet pipe 38 and flows into the mixing valve 25 from the first inlet. Further, low-temperature water from the water source passes through the first water supply pipe 27 and the second water supply pipe 28 and flows into the mixing valve 25 from the second inlet. The high-temperature water in the hot water storage tank 12 that has flowed into the mixing valve 25 and the low-temperature water in the water source are mixed and flow out from the outlet of the mixing valve 25. Here, the water mixed by the mixing valve 25 is hereinafter referred to as mixed water. The mixed water flowing out from the mixing valve 25 passes through the bath pipe 39, the bathtub going pipe 40 in the hot water supply device, and the bathtub going pipe 3, and flows into the bathtub 2 from the bathtub water inflow port 2a.

In the hot water filling operation, the opening degree of the first inlet and the opening degree of the second inlet of the mixing valve 25 are controlled by the control unit 43. The control unit 43 controls the opening degree of the first inlet and the opening degree of the second inlet of the mixing valve 25 so that the mixed water reaches a preset temperature, so that the high temperature water of the hot water storage tank 12 and the low temperature of the water source are lowered. Control the mixing ratio of water. The larger the ratio of the hot water in the hot water storage tank 12, the higher the temperature of the mixed water, and the larger the ratio of the low temperature water in the water source, the lower the temperature of the mixed water.

FIG. 5 is a schematic view of the hot water supply device according to the first embodiment during the reheating operation. In FIG. 5, the flow path through which water passes is shown by a thick line. Next, the flow of water in the reheating operation will be described with reference to FIG. In the reheating operation, the first four-way valve 22 communicates the a port and the d port and closes the b port and the c port. Further, the second four-way valve 23 is in a state where the a port and the c port are communicated with each other and the b port and the d port are closed. Further, the three-way valve 24 is in a state where the b port and the c port are communicated with each other and the a port is closed. Further, the solenoid valve 26 is in a closed state. Further, the mixing valve 25 may be in any state.

By operating the heat source pump 13 and the bath circulation pump 14, the high-temperature water stored in the upper part of the hot water storage tank 12 flows out from the first tank upper inflow port 12a in the reheating operation, and the bath stored in the bathtub 2 Water flows out from the bathtub water outlet 2b. The high-temperature water flowing out of the hot water storage tank 12 passes through the circulation pipe 42 and flows into the first water flow path of the bath heat exchanger 15. Further, the bath water flowing out from the bathtub 2 passes through the bathtub return pipe 4 and the bathtub return pipe 41 in the hot water supply device, and flows into the second water flow path of the bath heat exchanger 15. As described in the above-mentioned hot water filling operation, the water supplied to the bathtub 2 is a mixed water obtained by mixing the high temperature water of the hot water storage tank 12 and the low temperature water of the water source, and the temperature of the bath water stored in the bathtub 2. Is lower than the temperature of the hot water in the hot water storage tank 12. Therefore, the bath water passing through the second water flow path of the bath heat exchanger 15 is heated by the high temperature water of the hot water storage tank 12 passing through the first water flow path of the bath heat exchanger 15. The bath water heated by the bath heat exchanger 15 passes through the bathtub going pipe 40 and the bathtub going pipe 3 in the hot water supply device, and flows into the bathtub 2 again from the bathtub water inflow port 2a. Further, the water that has passed through the first water flow path of the bath heat exchanger 15 whose temperature has been lowered by heating the bath water is the circulation pipe 42, the heating unit going pipe 30, the bypass pipe 32, and the second hot water pipe 34. It passes through the fifth hot water pipe 37 and flows into the hot water storage tank 12 from the central inflow port 12c of the tank.

FIG. 6 is a flowchart of post-hot water control in the hot water supply system according to the first embodiment. Next, the post-filling control performed after the bathtub 2 is filled with enough bath water so that a person can take a bath will be described with reference to FIG.

After the start of control after filling with hot water, the process proceeds to step S101. In step S101, the control unit 43 obtains the information detected by the dressing room person detecting means 81 and determines whether or not a person is present in the dressing room 300. Examples of the judgment method include the following methods. Generally, the body temperature of a person is higher than the temperature of the air in the dressing room 300. Therefore, when the person detecting means 81 in the dressing room is an infrared sensor, the temperature distribution detected by the infrared sensor is higher than the ambient temperature. If the location is detected, it is determined that a person is present in the dressing room 300, and if there is no place where the temperature is higher than the ambient temperature, no person is present in the dressing room 300. Judge. Further, in general, the lighting of the dressing room 300 is turned on while a person is present in the dressing room 300. Therefore, when the undressing room person detecting means 81 is an illuminance sensor, it is emitted from the lighting of the dressing room 300. When the illuminance sensor detects an illuminance equal to or greater than the threshold illuminance set to be smaller than the illuminance of the light to be generated, it is determined that a person is present in the dressing room 300, and the illuminance sensor detects an illuminance smaller than the threshold illuminance. It is determined that no one is present in the dressing room 300.

If the control unit 43 determines that a person is present in the dressing room 300 in the process of step S101 (steps S101 and YES), the process proceeds to step S102. In step S102, the control unit 43 acquires the temperature Tb of the bath water. In step S102 of the hot water supply system 100 according to the first embodiment, the control unit 43 acquires the temperature detected by the bathtub return temperature sensor 18 as the bath water temperature Tb. When the bath circulation pump 14 is not operating in step S102, the temperature detected by the bathtub return temperature sensor 18 after operating the bath circulation pump 14 and operating the bath circulation pump 14 is the temperature of the bath water. Obtained as Tb.

After the process of step S102, the process proceeds to the process of step S103. In step S103, the control unit 43 determines whether or not the temperature Tb of the bath water acquired in step S102 is lower than the first threshold temperature Tb1. That is, in step S103, the control unit 43 determines whether or not the condition of Tb <Tb1 is satisfied. The first threshold temperature Tb1 is set in advance by the control unit 43 to a temperature equal to or lower than the set temperature Ts, and is stored in the memory of the control unit 43. The set temperature Ts is determined by, for example, being input by the user of the hot water supply system 100 by the operation units 51 and 61, and is stored in the memory of the control unit 43. For example, when the set temperature Ts is set to 40 degrees, the first threshold temperature Tb1 is set by the control unit 43 so as to satisfy the relationship of Tb1 ≦ 40 degrees.

When the control unit 43 determines that the temperature Tb of the bath water is lower than the first threshold temperature Tb1 in the process of step S103 (steps S103, YES), the process proceeds to the process of step S104. In step S104, the control unit 43 controls each configuration of the hot water supply device 1 so as to perform the reheating operation. That is, when the reheating operation is performed immediately before the processing in step S104, the control unit 43 continues the reheating operation, and when the reheating operation is not performed immediately before the processing in step S104, various valves are pressed. As described above, the switching heat source pump 13 and the bath circulation pump 14 are operated.

After the process of step S104, the process returns to step S101, and the control unit 43 again determines whether or not a person is present in the dressing room 300.

When the control unit 43 determines that the temperature Tb of the bath water is equal to or higher than the first threshold temperature Tb1 in the process of step S103 (steps S103, NO), the process proceeds to step S105. In step S105, the control unit 43 controls each configuration of the hot water supply device 1 so as not to perform the reheating operation. That is, when the reheating operation is performed immediately before the processing in step S105, the control unit 43 stops the heat source pump 13 and the bath circulation pump 14 to stop the reheating operation, and follows immediately before the processing in step S105. When the heating operation is not performed, the control unit 43 proceeds to the next process without performing the reheating operation.

After the process of step S105, the process returns to step S101, and the control unit 43 again determines whether or not a person is present in the dressing room 300.

In the process of step S101, when the control unit 43 determines that no person is present in the dressing room 300 (steps S101 and NO), the process proceeds to the process of step S105, and the control unit 43 does not perform the reheating operation. Control each configuration of the hot water supply device 1. That is, when no person is present in the dressing room 300, the reheating operation is not performed.

The post-filling control is terminated when the post-filling control end condition is satisfied. The cases where the control end condition after hot water filling is satisfied are, for example, when a command to stop the control after hot water filling is input from the operation units 51 and 61, when the predetermined control end time after hot water filling is reached, or For example, a predetermined time has elapsed from the start of control after filling with hot water.

As described above, the configuration of the hot water supply system 100 according to the first embodiment includes a bath water temperature raising means for raising the temperature of the bath water stored in the bath water 2 (corresponding to the bath heat exchanger 15) and bath water. The bath water temperature detecting means for detecting the temperature (corresponding to the bath return temperature sensor 18) and the information for determining whether or not a person is present in the dressing room 300 adjacent to the bathroom 200 in which the bath 2 is arranged are provided. Information on the temperature of the bath water is acquired from the undressing room person detecting means 81 for detecting and the bath water temperature detecting means, and information for determining whether or not a person is present in the undressing room 300 is acquired from the undressing room person detecting means 81. A control unit 43 for controlling the bath water temperature raising means is provided, and the control unit 43 performs control based on the information acquired from the undressing room person detecting means 81, and controls based on the information acquired from the undressing room person detecting means 81. Is a bath water temperature detecting means when the control unit 43 has acquired information from the undressing room person detecting means 81 that determines that a person is present in the undressing room 300 (corresponding to steps S101 and YES). When the temperature Tb of the bath water obtained from is lower than the predetermined first threshold temperature Tb1 (corresponding to steps S103 and YES), the temperature of the bath water is raised by the bath water temperature raising means (step S104). When the control and the control unit 43 acquire information from the undressing room person detecting means 81 that it is determined that no person is present in the undressing room 300 (corresponding to steps S101 and NO), the bath is used. The configuration includes a control that does not raise the temperature of the bath water by the water temperature raising means (corresponding to step S105). In this configuration, when the control unit 43 acquires information from the undressing room person detecting means 81 that determines that a person is present in the undressing room 300, the temperature of the bath water acquired from the bath water temperature detecting means. The hot water supply system 100 of the first embodiment prepares to take a bath by providing a configuration in which the temperature of the bath water is raised by the bath water temperature raising means when the Tb becomes lower than the predetermined first threshold temperature Tb1. The temperature of the bath water can be raised when a person enters the dressing room 300, and the temperature of the hot water in the bath can be raised to a desired temperature before the person is immersed in the bath. Further, in the configuration, when the control unit 43 acquires information from the dressing room person detecting means 81 that determines that no person is present in the dressing room 300, the bath water temperature is raised by the bath water temperature raising means. By providing a configuration that does not raise the temperature, the hot water supply system 100 of the first embodiment is unnecessary because the reheating operation is not performed in a state where no person is present in the dressing room 300 and the bath is not immediately performed. It has the effect of suppressing the reheating operation and reducing the energy consumption.

Further, in the hot water supply system 100 according to the first embodiment, as an additional configuration, the control unit 43 controls the person from the undressing room person detecting means 81 to the undressing room 300 for control based on the information acquired from the undressing room person detecting means 81. Control to acquire information on the temperature of the bath water from the bath water temperature detecting means (corresponding to step S102) when the information is acquired to be determined to be in the room (corresponding to steps S101 and YES). When the information indicating that no person is present in the undressing room 300 is acquired from the undressing room person detecting means 81 (corresponding to steps S101 and NO), the bath water temperature is detected from the bath water temperature detecting means. It has a configuration including a control that does not raise the temperature of the bath water by means for raising the temperature of the bath water without acquiring information on the above. With the additional configuration, the hot water supply system 100 according to the first embodiment has an effect of suppressing the acquisition of unnecessary information. In particular, when a bath water temperature raising means is provided in the middle of the pipe as in the bathtub return temperature sensor 18 of the hot water supply system 100 according to the first embodiment, the pump is operated so that the bath water does not flow into the pipe. Since the temperature of the bath water cannot be detected, the operating time of the pump can be shortened by the additional configuration, and the energy consumption can be reduced.

Further, the configuration of the hot water supply device 1 according to the first embodiment includes a bath water temperature raising means (corresponding to the bath heat exchanger 15) for raising the temperature of the bath water stored in the bath water 2 arranged in the bathroom 200. When a person is present in the dressing room 300 adjacent to the bathroom 200 (corresponding to steps S101 and YES), the bath water temperature Tb becomes lower than the predetermined first threshold temperature Tb1. When the temperature of the bath water is raised by the bath water temperature raising means (corresponding to step S104) in (steps S103 and YES are applicable) and no person is present in the dressing room 300 (corresponding to steps S101 and NO). Is a configuration in which the temperature of the bath water is not raised by the means for raising the temperature of the bath water. The hot water supply device 1 according to the first embodiment can exhibit the same effect as the effect described in the configuration of the hot water supply system 100 according to the first embodiment by the configuration.

Further, the hot water supply device 1 according to the first embodiment includes a hot water storage tank 12 for storing water having a temperature higher than that of the bath water as an additional configuration, and the bath water temperature raising means is a first water flow path and a second water flow path. It is a heat exchanger (corresponding to the bath heat exchanger 15) in which a water flow path is formed and heat is exchanged between the water flowing through the first water flow path and the bath water flowing through the second water flow path. The water flowing through the water flow path of the above has a structure in which the temperature of the water is higher than that of the bath water flowing out of the hot water storage tank 12. With this configuration, high-temperature water boiled during a time when the electricity rate is low can be used for reheating operation, and the cost of reheating operation can be reduced.

Further, the configuration of the control method of the hot water supply system 100 according to the first embodiment is the first step of determining whether or not a person is present in the dressing room 300 adjacent to the bathroom 200 in which the tub 2 is arranged (1st step). When it is determined that a person is present in the dressing room 300 in the first step (corresponding to step S101) and when it is determined in the first step (corresponding to steps S101 and YES), the temperature Tb of the bath water stored in the bath 2 is changed. When the temperature becomes lower than the predetermined first threshold temperature Tb1 (corresponding to steps S103 and YES), the temperature of the bath water is raised by the bath water temperature raising means (corresponding to the bath heat exchanger 15). When it is determined that no person is present in the dressing room 300 in the step (corresponding to step S104) and in the first step (corresponding to steps S101 and NO), the temperature of the bath water is adjusted by the bath water temperature raising means. The configuration includes a third step (corresponding to step S105) in which the temperature is not raised. The control method of the hot water supply system 100 according to the first embodiment can produce the same effect as the effect described in the configuration of the hot water supply system 100 according to the first embodiment by the configuration.

Next, a modified example of the first embodiment will be described.

FIG. 7 is a schematic view of the hot water supply device according to the first modification of the first embodiment during the reheating operation. In FIG. 7, the flow path through which water passes is shown by a thick line. In the hot water supply system 100 and the hot water supply device 1 of the first embodiment, the bath water is heated by the high temperature water stored in the upper part of the hot water storage tank 12, but the bath water is not limited to this. For example, a reheating operation for heating the bath water may be performed using the heating unit 11 as in the hot water supply system 100a and the hot water supply device 1a of the first modification of the first embodiment shown in FIG. 7.

The flow of water in the reheating operation of the hot water supply system 100a according to the first modification of the first embodiment will be described. The configuration of the hot water supply system 100a according to the first modification of the first embodiment differs only in the flow of water circulating in the hot water supply device 1a in the reheating operation, and other such as the flow of bath water in the reheating operation. Since the configuration is the same as that of the hot water supply system 100 of the first embodiment, the description of the same configuration will be omitted. In the reheating operation, the first four-way valve 22 communicates the b port and the d port and closes the a port and the c port. Further, the second four-way valve 23 is in a state where the a port and the b port are communicated with each other and the c port and the d port are closed. Further, the three-way valve 24 is in a state where the b port and the c port are communicated with each other and the a port is closed. Further, the solenoid valve 26 is in a closed state. Further, the mixing valve 25 may be in any state. By operating the heat source pump 13 and the bath circulation pump 14, the water accumulated in the pipe flows into the heating unit 11 by the heat source pump 13 in the reheating operation. The water flowing into the heating unit 11 is heated to become high-temperature water, passes through the heating unit return pipe 31, the second hot water pipe 34, the third hot water pipe 35, and the circulation pipe 42, and is a heat exchanger for the bath. It flows into the first water flow path of 15. The temperature of the hot water heated by the heating unit 11 is higher than the temperature of the bath water stored in the bathtub 2. Therefore, the bath water passing through the second water flow path of the bath heat exchanger 15 is heated by the high temperature water heated by the heating unit 11 passing through the first water flow path of the bath heat exchanger 15. .. Further, the water that has passed through the first water flow path of the bath heat exchanger 15 whose temperature has been lowered by heating the bath water has passed through the circulation pipe 42 and the heating unit going pipe 30 and is heated again by the heating unit 11. NS.

The hot water supply system 100a and the hot water supply device 1a according to the first modification of the first embodiment include a heating unit 11 for heating water as an additional configuration, and the bath water temperature raising means includes a first water flow path and a first water flow path. It is a heat exchanger (corresponding to the bath heat exchanger 15) in which a second water flow path is formed and heat is exchanged between the water flowing through the first water flow path and the bath water flowing through the second water flow path. The water flowing out from the heating unit 11 flows into the first water flow path, and the water flowing out from the first water flow path flows into the heating unit 11. With this configuration, the reheating operation can be performed without using the water stored in the hot water storage tank 12, and it is possible to suppress the destruction of the temperature stratification formed inside the hot water storage tank 12.

FIG. 8 is a flowchart of post-filling control of the hot water supply system according to the second modification of the first embodiment. In the hot water supply system 100 of the first embodiment, when the control unit 43 determines that no person is present in the dressing room 300 (steps S101, NO), the reheating operation is not performed, but the present invention is not limited to this. For example, as in the hot water supply system 100b according to the second modification of the first embodiment shown in FIG. 8, the temperature Tb of the bath water changes when the control unit determines that no person is present in the dressing room 300. The reheating operation may be performed when the temperature becomes lower than the second threshold temperature Tb2, which is set to a value lower than the first threshold temperature Tb1.

The post-filling control of the hot water supply system according to the second modification of the first embodiment will be described. The hot water supply system 100b and the hot water supply device 1b according to the second modification of the first embodiment are processed when the control unit 43 determines that no person is present in the dressing room 300 in the process of step S101. Since the other configurations such as the processes from step S101 to step S105 are the same as the post-filling control of the hot water supply system 100 of the first embodiment, the description of the same configuration will be omitted.

If the control unit 43 determines that no person is present in the dressing room 300 in the process of step S101 (steps S101 and NO), the process proceeds to step S106. In step S106, the control unit 43 acquires the temperature Tb of the bath water. In step S106 of the hot water supply system 100b according to the second modification of the first embodiment, similarly to step S102, the control unit 43 acquires the temperature detected by the bathtub return temperature sensor 18 as the bath water temperature Tb. When the bath circulation pump 14 is not operating in step S106, the temperature detected by the bathtub return temperature sensor 18 after operating the bath circulation pump 14 and operating the bath circulation pump 14 is the temperature of the bath water. Obtained as Tb.

After the process of step S106, the process proceeds to the process of step S107. In step S107, the control unit 43 determines whether or not the temperature Tb of the bath water acquired in step S106 is lower than the second threshold temperature Tb2. That is, in step S107, the control unit 43 determines whether or not the condition of Tb <Tb2 is satisfied. The second threshold temperature Tb2 is set in advance by the control unit 43 to a temperature lower than the first threshold temperature Tb1, and is stored in the memory of the control unit 43. Further, as described above, the first threshold temperature Tb1 is set to be equal to or lower than the set temperature Ts. Therefore, for example, when the set temperature Ts is 40 degrees, the first threshold temperature Tb1 and the second threshold temperature Tb2 are determined by the control unit 43 so as to satisfy the relationship of Tb2 <Tb1 ≦ 40 degrees.

When the control unit 43 determines that the temperature Tb of the bath water is lower than the second threshold temperature Tb2 in the process of step S107 (steps S107, YES), the process proceeds to the process of step S108. In step S108, similarly to step S104, the control unit 43 controls each configuration of the hot water supply device 1b so as to perform the reheating operation. That is, when the reheating operation is performed immediately before the processing of step S108, the control unit 43 continues the reheating operation, and when the reheating operation is not performed immediately before the processing of step S108, the various valves are opened. As described above, the switching heat source pump 13 and the bath circulation pump 14 are operated.

When the control unit 43 determines that the temperature Tb of the bath water is equal to or higher than the second threshold temperature Tb2 in the process of step S107 (steps S107, NO), the process proceeds to the process of step S109. In step S109, the control unit 43 controls each configuration of the hot water supply device 1b so as not to perform the reheating operation. That is, when the reheating operation is performed immediately before the processing in step S109, the control unit 43 stops the heat source pump 13 and the bath circulation pump 14 to stop the reheating operation, and follows immediately before the processing in step S105. When the heating operation is not performed, the control unit 43 proceeds to the next process without performing the reheating operation.

After the process of step S108 or step S109, the process returns to step S101, and the control unit 43 again determines whether or not a person is present in the dressing room 300.

As described above, the configuration of the hot water supply system 100b according to the second modification of the first embodiment corresponds to the bath water temperature raising means (bath heat exchanger 15) for raising the temperature of the bath water stored in the bath water 2. ), The bath water temperature detecting means for detecting the temperature of the bath water (corresponding to the bath water return temperature sensor 18), and whether or not a person is present in the dressing room 300 adjacent to the bathroom 200 in which the bath water 2 is arranged. Information on the temperature of the bath water from the undressing room person detecting means 81 that detects the information to be determined, and the bath water temperature detecting means, and the undressing room person detecting means 81 to determine whether or not a person is present in the undressing room 300. The control unit 43 includes a control unit 43 that acquires the information to be used and controls the bath water temperature rising means, and the control unit 43 performs control based on the information acquired from the undressing room person detecting means 81 and acquires the information from the undressing room person detecting means 81. The control based on the information is performed when the control unit 43 acquires information from the undressing room person detecting means 81 to determine that a person is present in the undressing room 300 (steps S101 and YES correspond to). Is the temperature of the bath water by the bath water temperature raising means when the temperature Tb of the bath water obtained from the bath water temperature detecting means becomes lower than the predetermined first threshold temperature Tb1 (corresponding to steps S103 and YES). (Applicable to step S104) and when information is acquired from the undressing room person detecting means 81 to determine that no person is present in the undressing room 300 (corresponding to steps S101 and NO). Is when the temperature Tb of the bath water obtained from the bath water temperature detecting means becomes lower than the second threshold temperature Tb2 defined to be lower than the first threshold temperature Tb1 (steps S107 and YES correspond to). The configuration includes a control for raising the temperature of the bath water by means for raising the temperature of the bath water (corresponding to step S108). In this configuration, when the control unit 43 acquires information from the undressing room person detecting means 81 that determines that a person is present in the undressing room 300, the temperature of the bath water acquired from the bath water temperature detecting means. By providing a configuration in which the temperature of the bath water is raised by the bath water temperature raising means when Tb becomes lower than the predetermined first threshold temperature Tb1, the hot water supply of the second modification of the first embodiment is provided. The system 100b can raise the temperature of the bath water when a person enters the dressing room 300 preparing to take a bath, and can raise the temperature of the hot water in the bath to a desired temperature before the person is immersed in the bath. It works. Further, in the configuration, when the control unit 43 acquires information from the undressing room person detecting means 81 that determines that no person is present in the undressing room 300, the bath is acquired from the bath water temperature detecting means. By providing a configuration in which the temperature of the bath water is raised by the bath water temperature raising means when the temperature Tb of the water becomes lower than the second threshold temperature Tb2 set to a value lower than the first threshold temperature Tb1. The hot water supply system 100b of the second modification of the first embodiment is more than a case where there is a person in the dressing room 300 in a state where no person is present in the dressing room 300 and the bath is not immediately performed. Since the threshold temperature for reheating operation is low, it has the effect of suppressing unnecessary reheating operation and reducing energy consumption, and until the temperature of the bath water drops significantly, such as a long time from filling to bathing, until a person is immersed in the bathtub. In addition, it has the effect of suppressing the temperature of hot water in the bath from being unable to rise to a desired temperature.

Further, the configuration of the hot water supply device 1b according to the second modification of the first embodiment is a bath water temperature raising means (heat exchange for bath) for raising the temperature of the bath water stored in the bath water 2 arranged in the bathroom 200. When a person is present in the dressing room 300 adjacent to the bathroom 200 (corresponding to steps S101 and YES), the bath water temperature Tb is a predetermined first threshold temperature. When the temperature is lower than Tb1 (corresponding to steps S103 and YES), the temperature of the bath water is raised by the bath water temperature raising means (corresponding to step S104), and when no person is present in the dressing room 300 (step S101). , NO), when the temperature Tb of the bath water is lower than the second threshold temperature Tb2, which is set to a value lower than the first threshold temperature Tb1 (corresponding to steps S107 and YES). The structure is such that the temperature of the bath water is raised by the temperature raising means. The hot water supply device 1b of the second modification of the first embodiment can exhibit the same effect as the effect described in the configuration of the hot water supply system 100b according to the second modification of the first embodiment by the configuration.

Further, the configuration of the control method of the hot water supply system 100b according to the second modification of the first embodiment determines whether or not a person is present in the dressing room 300 adjacent to the bathroom 200 in which the bathtub 2 is arranged. In the first step (corresponding to step S101) and when it is determined in the first step that a person is present in the dressing room 300 (corresponding to steps S101 and YES), the water is stored in the bathtub 2. When the bath water temperature Tb becomes lower than the predetermined first threshold temperature Tb1 (corresponding to steps S103 and YES), the bath water temperature is determined by the bath water temperature raising means (corresponding to the bath heat exchanger 15). The temperature of the bath water rises in the second step (corresponding to step S104) and when it is determined in the first step that no person is present in the dressing room 300 (corresponding to steps S101 and NO). When the temperature becomes lower than the second threshold temperature Tb2 defined to be lower than the first threshold temperature Tb1 (corresponding to steps S107 and YES), the bath water temperature Tb is raised by the bath water temperature raising means. The configuration includes three steps (corresponding to step S108). The control method of the hot water supply system 100b according to the second modification of the first embodiment has the same effect as the effect described in the configuration of the hot water supply system 100b according to the second modification of the first embodiment. Can be done.

In the hot water supply system 100 of the first embodiment, the bath water temperature raising means is the bath heat exchanger 15, and the temperature of the bath water is raised by exchanging heat between the water having a temperature higher than that of the bath water and the bath water. However, the present invention is not limited to this, and the bath water temperature raising means may be any means for raising the bath water temperature. For example, the temperature of the bath water may be raised by supplying hot water having a temperature higher than that of the bath water to the bathtub 2. In this case, the bath water temperature raising means is a mixing valve that mixes the water of the hot water storage tank 12 for storing water having a temperature higher than that of the bath water, the water of the water source, and the water of the hot water storage tank 12 and supplies the water having a temperature higher than that of the bath water to the bathtub 2. 25 corresponds to this.

In the hot water supply system 100 of the first embodiment, the bath water temperature detecting means is the bathtub return temperature sensor 18, but the bath water temperature detecting means may be any means for detecting the temperature of the bath water. For example, the bathtub 2 is provided with a temperature sensor that directly detects the temperature of the bath water stored in the bathtub 2, and the temperature sensor may be used as the bath water temperature detecting means.

Embodiment 2.
Next, the hot water supply system 100c according to the second embodiment will be described. The hot water supply system 100c and the hot water supply device 1c according to the second embodiment are different from the hot water supply system 100 and the hot water supply device 1 according to the first embodiment in that they newly perform hot water filling control. Since the hot water supply system 100c according to the second embodiment has the same configuration as the hot water supply system 100 according to the first embodiment except that the hot water filling control is performed, the same part will be omitted.

FIG. 9 is a flowchart of hot water filling control in the hot water supply system according to the second embodiment. Next, a hot water filling control for storing bath water in the bathtub 2 so that a person can take a bath will be described with reference to FIG. Hot water filling control is started when any predetermined hot water filling start condition is satisfied. When the hot water filling start condition is satisfied, for example, when a command to start the hot water filling operation of filling the bathtub 2 is input from the operation units 51 and 61, or a predetermined hot water filling start time is reached. There are cases.

After the start of the hot water filling control, the process proceeds to step S201. In step S201, the control unit 43 controls each configuration of the hot water supply device 1b so as to start the hot water filling operation. That is, the control unit 43 switches the various valves as described in the hot water filling operation of the first embodiment, and supplies the water mixed by the mixing valve 25 to the bathtub 2.

After the process of step S201 is completed, the process proceeds to step S202. In step S202, the control unit 43 obtains the information detected by the dressing room person detecting means 81 and determines whether or not a person is present in the dressing room 300. Since the method of determination in step S202 is the same as the method described in step S101 of the first embodiment, the description thereof will be omitted.

If the control unit 43 determines in the process of step S202 that a person is present in the dressing room 300 (steps S202, YES), the process proceeds to step S203. In step S203, the control unit 43 controls the hot water filling temperature Tf, which is the temperature of the water supplied to the bathtub 2, so that it becomes the first hot water filling temperature Tf1. Here, the first hot water filling temperature Tf1 is set in advance by the control unit 43 to a temperature equal to or lower than the set temperature Ts, and is stored in the memory of the control unit 43. In the hot water supply system 100c according to the second embodiment, the hot water filling temperature Tf is controlled by controlling the ratio of the water of the water source in the mixed water and the ratio of the water in the hot water storage tank 12. More specifically, in the hot water supply system 100c according to the second embodiment, control is performed as follows. The control unit 43 acquires the temperature detected by the bathtub going temperature sensor 17 as the current hot water filling temperature Tfn. When the acquired current hot water filling temperature Tfn is smaller than the first hot water filling temperature Tf1 (Tfn <Tf1), the control unit 43 increases the ratio of the water in the hot water storage tank 12 of the mixed water flowing out from the mixing valve 25 to the water source. The mixing valve 25 is controlled so that the ratio of water is reduced. When the acquired current hot water filling temperature Tfn is larger than the first hot water filling temperature Tf1 (Tfn> Tf1), the control unit 43 reduces the ratio of the water in the hot water storage tank 12 of the mixed water flowing out from the mixing valve 25 to the water source. The mixing valve 25 is controlled so as to increase the ratio of water. When the acquired current hot water filling temperature Tfn is the same as the first hot water filling temperature Tf1 (Tfn = Tf1), the control unit 43 controls the mixing valve 25 so as to maintain the ratio of the mixed water flowing out from the mixing valve 25.

If the control unit 43 determines in the process of step S202 that no person is present in the dressing room 300 (steps S202, NO), the process proceeds to step S204. In step S204, the control unit 43 controls the hot water filling temperature Tf so that it becomes the second hot water filling temperature Tf2. Here, the second hot water filling temperature Tf2 is set in advance by the control unit 43 to a temperature lower than the first hot water filling temperature Tf1, and is stored in the memory of the control unit 43. Since the specific control method is the same as the content in which the first hot water filling temperature Tf1 of the control method described in step S203 is replaced with the second hot water filling temperature Tf2, the description thereof will be omitted.

After the process of step S203 or step S204, the process of step S205 is performed. In step S205, the control unit 43 determines whether or not the hot water filling end condition is satisfied. When the hot water filling end condition is satisfied, for example, when the water level of the bath water stored in the bathtub 2 measured by the water level sensor reaches a predetermined threshold water level, or when the hot water filling end time is set in advance. For example, when it reaches.

If the control unit 43 determines that the hot water filling end condition is not satisfied in the process of step S205 (steps S205, NO), the process returns to step S202 and the control unit 43 again has a person in the dressing room 300. Judge whether or not.

If the control unit 43 determines in the process of step S205 that the hot water filling end condition is satisfied (steps S205, YES), the process proceeds to step S206. In step S206, the control unit 43 controls each configuration of the hot water supply device 1b so as to end the hot water filling operation. That is, the control unit 43 closes the solenoid valve 26 and ends the supply of water to the bathtub 2.

After the process of step S206 is completed, the control unit 43 ends the hot water filling control.

As described above, the configuration of the hot water supply system 100c according to the second embodiment is adjacent to the hot water filling means for supplying water to the bathtub 2 (corresponding to the hot water storage tank 12 and the mixing valve 25) and the bathroom 200 in which the bathtub 2 is arranged. The undressing room person detecting means 81 that detects information for determining whether or not a person is present in the undressing room 300, and whether or not a person is present in the undressing room 300 from the undressing room person detecting means 81. A control unit 43 that acquires the determined information and controls the temperature of the water supplied from the hot water filling means to the bathtub 2 is provided, and the control unit 43 performs control based on the information acquired from the undressing room person detecting means 81. For control based on the information acquired from the undressing room person detecting means 81, when the control unit 43 acquires the information determined that a person is present in the undressing room 300 from the undressing room person detecting means 81. The control unit 43 determines from the undressing room person detecting means 81 that no person is present in the undressing room 300 based on the temperature of the water supplied from the hot water filling means to the bathtub 2 (corresponding to the first hot water filling temperature Tf1). The configuration includes a control for setting the temperature of the water supplied from the hot water filling means to the bathtub 2 (corresponding to the second hot water filling temperature Tf2) to a lower value when the information is acquired. In this configuration, the control unit 43 obtains information from the undressing room person detecting means 81 that determines that a person is present in the undressing room 300, and the water supplied to the bathtub 2 from the hot water filling means. The temperature of the water supplied from the hot water filling means to the bathtub 2 is lower than the temperature when the information that the undressing room person detecting means 81 determines that no person is present in the undressing room 300 is acquired. The hot water supply system 100c according to the second embodiment can suppress energy consumption due to heat dissipation of bath water.

Further, the configuration of the hot water supply device 1c according to the second embodiment includes hot water filling means (corresponding to the hot water storage tank 12 and the mixing valve 25) for supplying water to the bathtub 2 arranged in the bathroom 200, and is adjacent to the bathroom 200. When no person is present in the dressing room 300 than the temperature of the water supplied to the bathtub 2 from the hot water filling means (corresponding to the first hot water filling temperature Tf1) when a person is present in the dressing room 300. The temperature of the water supplied from the hot water filling means to the bathtub 2 (corresponding to the second hot water filling temperature Tf2) is lower. The hot water supply device 1c according to the second embodiment can exhibit the same effect as the effect described in the configuration of the hot water supply system 100c according to the second embodiment by the configuration.

Further, the configuration of the control method of the hot water supply system 100c according to the second embodiment is the first step of determining whether or not a person is present in the dressing room 300 adjacent to the bathroom 200 in which the bathtub 2 is arranged. Step S202 is applicable) and when it is determined in the first step that a person is present in the dressing room 300, the temperature is predetermined by the hot water filling means (corresponding to the hot water storage tank 12 and the mixing valve 25). When it is determined in the fourth step (corresponding to step S203) of supplying water having the first hot water filling temperature Tf1 to the bathtub 2 and in the first step, no person is present in the dressing room 300. The configuration includes a fifth step (corresponding to step S204) of supplying water having a second hot water filling temperature Tf2 whose temperature is lower than the first hot water filling temperature Tf1 from the hot water filling means to the bathtub 2. The control method of the hot water supply system 100c according to the second embodiment can produce the same effect as the effect described in the configuration of the hot water supply system 100c according to the second embodiment by the configuration.

Further, the configuration of the hot water supply system 100c according to the second embodiment, the configuration of the hot water supply device 1c according to the second embodiment, and the configuration of the control method of the hot water supply system 100c according to the second embodiment are related to the above-described first embodiment. The configuration of the hot water supply system 100, the configuration of the hot water supply device 1, the configuration of the control method of the hot water supply system 100, the configuration of the hot water supply system 100b according to the second modification of the first embodiment, the configuration of the hot water supply device 1b, and the control of the hot water supply system 100b. It may be an additional configuration to the configuration of the method.

Embodiment 3.
Next, the hot water supply system 100d according to the third embodiment will be described. In the hot water supply system 100d and the hot water supply device 1d according to the third embodiment, the undressing room air conditioner 8 has the undressing room temperature sensor 82 as compared with the hot water supply system 100 and the hot water supply device 1 according to the first embodiment. The difference is that the threshold temperature change control for changing the threshold temperature Tb1 is performed. The hot water supply system 100d and the hot water supply device 1d according to the third embodiment exclude the point that the undressing room air conditioner 8 has the undressing room temperature sensor 82 and the point that the threshold temperature change control for changing the first threshold temperature Tb1 is performed. Since other configurations are the same as those of the hot water supply system 100 and the hot water supply device 1 according to the first embodiment, the same parts will not be described.

FIG. 10 is a schematic view of the hot water supply system according to the third embodiment. The dressing room temperature sensor 82 detects the room temperature of the dressing room 300. Specifically, the undressing room temperature sensor 82 is provided inside the undressing room air conditioner 8 and detects the temperature of the air in the undressing room 300 before the undressing room air conditioner 8 sucks and harmonizes the air.

Further, the control unit 43 is communicably connected to the dressing room temperature sensor 82, and can acquire the room temperature of the dressing room 300 detected by the dressing room temperature sensor 82.

FIG. 11 is a flowchart of threshold temperature change control in the hot water supply system according to the third embodiment. Next, the threshold temperature change control for changing the first threshold temperature Tb will be described. The threshold temperature change control starts at the same time as the post-filling control described in the first embodiment, and ends at the same time as the post-filling control.

After starting the threshold temperature change control, the process proceeds to step S301. In step S301, the control unit 43 acquires the dressing room room temperature Td, which is the temperature of the air in the dressing room 300. In step S301 of the hot water supply system 100d according to the third embodiment, the control unit 43 acquires the room temperature of the dressing room 300 detected by the dressing room temperature sensor 82 as the dressing room room temperature Td.

After the process of step S301, the process proceeds to the process of step S302. In step S302, it is determined whether or not the dressing room room temperature Td acquired in step S301 is larger than the predetermined first threshold dressing room room temperature Tdt1. That is, in step S302, the control unit 43 determines whether or not the condition of Td <Tdt1 is satisfied. The first threshold dressing room room temperature Tdt1 is stored in the memory of the control unit 43.

If the control unit 43 determines that the dressing room room temperature Td is larger than the first threshold dressing room room temperature Tdt1 in the process of step S302 (steps S302, YES), the process proceeds to step S303. In step S303, the control unit 43 sets a predetermined high temperature threshold temperature Tb1a as the first threshold temperature Tb1.

If the control unit 43 determines in the process of step S302 that the dressing room room temperature Td is equal to or less than the first threshold dressing room room temperature Tdt1 (steps S302 and NO), the process proceeds to step S304. In step S304, the control unit 43 sets a predetermined low temperature threshold temperature Tb1b as the first threshold temperature Tb1. Here, the low temperature threshold temperature Tb1b is set to a temperature lower than the high temperature threshold temperature Tb1a. Further, as described in the first embodiment, the first threshold temperature Tb1 must satisfy the condition that the set temperature Ts or less. That is, the high temperature threshold temperature Tb1a and the low temperature threshold temperature Tb1b are defined so as to satisfy the condition of Ts ≧ Tb1a> Tb1b.

After the process of step S303 or step S304, the process returns to step S301 and the control unit 43 again acquires the dressing room room temperature Td.

By performing the threshold temperature change control at the same time as the post-filling control described in the first embodiment, the first threshold temperature Tb1 in the post-filling control step S103 shown in FIG. Can be changed. More specifically, when the dressing room room temperature Td is equal to or less than the first threshold undressing room room temperature Tdt1, the first threshold temperature Tb1 is lower than when the dressing room room temperature Td is larger than the first threshold undressing room room temperature Tdt1. The temperature Tb of the bath water that is set and the reheating operation is performed in the control after filling with hot water is also lowered. Therefore, when comparing the case where the dressing room room temperature Td is equal to or less than the first threshold undressing room room temperature Tdt1 and the case where the dressing room room temperature Td is larger than the first threshold undressing room room temperature Tdt1, the former is the bath water temperature Tb. Will be low.

As described above, the configuration of the hot water supply system 100d according to the third embodiment includes a bath water temperature raising means for raising the temperature of the bath water stored in the bathtub 2 (corresponding to the bath heat exchanger 15) and bath water. Bath water temperature detecting means for detecting temperature (corresponding to bath return temperature sensor 18) and dressing room room temperature detecting means for detecting room temperature of dressing room 300 adjacent to bathroom 200 in which bath 2 is arranged (dressing room temperature sensor 82). ), And a control unit 43 that acquires information on the temperature of the bath water from the bath water temperature detecting means and information on the room temperature of the dressing room from the dressing room room temperature detecting means and controls the bath water temperature rising means. The unit 43 controls based on the information acquired from the dressing room room temperature detecting means, and the bath water when the temperature Tb of the bath water acquired from the bath water temperature detecting means becomes lower than the predetermined first threshold temperature Tb1. The temperature raising means controls to raise the temperature of the bath water, the first threshold temperature Tb1 is determined by the control unit 43, and the control unit 43 controls the undressing room based on the information acquired from the undressing room room temperature detecting means. When the undressing room room temperature Td obtained from the room temperature detecting means is larger than the predetermined first threshold undressing room room temperature Tdt1, the control unit 43 controls the undressing room room temperature more than the first threshold temperature Tb1 (corresponding to the high temperature threshold temperature Tb1a). The configuration includes a control that sets the first threshold temperature Tb1 (corresponding to the low temperature threshold temperature Tb1b) to a lower value when the undressing room room temperature Td obtained from the detection means is equal to or lower than the first threshold undressing room room temperature Tdt1. be. In the configuration, the control unit 43 has a higher than the first threshold temperature Tb1 when the undressing room room temperature Td acquired by the control unit 43 from the undressing room room temperature detecting means is larger than the predetermined first threshold undressing room room temperature Tdt1. The hot water supply system 100d of the third embodiment has a configuration in which the first threshold temperature Tb1 is set to a lower value when the undressing room room temperature Td obtained from the undressing room room temperature detecting means is equal to or lower than the first threshold undressing room room temperature Tdt1. When the room temperature Td of the dressing room is low, the temperature of the bath water is lowered, so that the effect of suppressing the occurrence of the heat shock phenomenon caused by the sudden temperature change is obtained.

Further, the configuration of the hot water supply device 1d according to the third embodiment includes a bath water temperature raising means (corresponding to the bath heat exchanger 15) for raising the temperature of the bath water stored in the bathtub 2 arranged in the bathroom 200. When the temperature Tb of the bath water becomes lower than the predetermined first threshold temperature Tb1, the temperature of the bath water is raised by the bath water temperature raising means, and the room temperature of the undressing chamber 300 becomes the first threshold undressing. The first when the room temperature of the dressing room 300 adjacent to the bathroom 200 is equal to or less than the first threshold undressing room room temperature Tdt1 than the first threshold temperature Tb1 (corresponding to the high temperature threshold temperature Tb1a) when the room temperature is larger than Tdt1. The threshold temperature Tb1 (corresponding to the low temperature threshold temperature Tb1b) has a lower value. The hot water supply device 1d according to the third embodiment can exhibit the same effect as the effect described in the configuration of the hot water supply system 100d according to the third embodiment by the configuration.

Further, the configuration of the control method of the hot water supply system 100d according to the third embodiment is such that the bath water temperature rises when the temperature Tb of the bath water stored in the bath 2 becomes lower than the predetermined first threshold temperature Tb1. The sixth step (corresponding to step S104) of raising the temperature of the bath water by means (corresponding to the bath heat exchanger 15) and the room temperature of the dressing room 300 adjacent to the bathroom 200 in which the bath 2 is arranged (corresponding to the undressing room). The seventh step (corresponding to steps S301 and S302) and the seventh step of comparing the room temperature of the undressing room 300 obtained by acquiring the room temperature Td) with the first threshold undressing room room temperature Tdt1 and the undressing room 300 in the seventh step. In the eighth step (corresponding to step S303) and the seventh step in which the predetermined high temperature threshold temperature Tb1a is set as the first threshold temperature Tb1 when the room temperature is larger than the first threshold undressing room room temperature Tdt1. When the room temperature of the undressing chamber 300 is equal to or less than the first threshold undressing chamber room temperature Tdt1, the ninth step (the ninth step) in which the low temperature threshold temperature Tb1b set to a value lower than the high temperature threshold temperature Tb1a is set as the first threshold temperature Tb1. Step S304 corresponds to). The control method of the hot water supply system 100d according to the third embodiment can produce the same effect as the effect described in the configuration of the hot water supply system 100d according to the third embodiment by the configuration.

Further, the configuration of the hot water supply system 100d, the configuration of the hot water supply device 1d, and the configuration of the control method of the hot water supply system 100d according to the third embodiment are the configuration of the hot water supply system 100 and the configuration of the hot water supply device 1 according to the above-described first embodiment. The configuration of the control method of the hot water supply system 100, the configuration of the hot water supply system 100b according to the second modification of the first embodiment, the configuration of the hot water supply device 1b, the configuration of the control method of the hot water supply system 100b, and the hot water supply according to the second embodiment. It may be an additional configuration to the configuration of the system 100c, the configuration of the hot water supply device 1c, and the configuration of the control method of the hot water supply system 100c. However, the configuration of the hot water supply system 100d, the configuration of the hot water supply device 1d, and the configuration of the control method of the hot water supply system 100d according to the third embodiment are the configuration of the hot water supply system 100b and the hot water supply device 1b according to the second modification of the first embodiment. It is desirable that the second threshold temperature Tb2 is set to a temperature lower than both the high temperature threshold temperature Tb1a and the low temperature threshold temperature Tb1b in the case of the configuration of the above and the configuration of the control method of the hot water supply system 100b. .. That is, it is desirable that each value is set so as to satisfy the condition of Tb1a> Tb1b> Tb2.

A modified example of the third embodiment will be described. In the third embodiment, the dressing room temperature sensor 82 provided inside the dressing room air conditioner 8 is used as the dressing room room temperature detecting means, but the present invention is not limited to this. For example, the temperature sensor may be independently arranged in the dressing room, and the temperature sensor may be used as the dressing room room temperature detecting means.

Embodiment 4.
Next, the hot water supply system 100e according to the fourth embodiment will be described. In the hot water supply system 100e and the hot water supply device 1e according to the fourth embodiment, the undressing room air conditioner 8 has the undressing room temperature sensor 82 as compared with the hot water supply system 100c and the hot water supply device 1c according to the second embodiment. The difference is that the hot water filling temperature change control for changing the hot water filling temperature Tf1 is performed. The hot water supply system 100e and the hot water supply device 1e according to the fourth embodiment have the same configurations except that the undressing room air conditioner 8 has the undressing room temperature sensor 82 and the hot water filling temperature change control is performed. It is the same as the hot water supply system 100c and the hot water supply device 1c according to the above. Further, in the hot water supply system 100e according to the fourth embodiment, the undressing room air conditioner 8 has the undressing room temperature sensor 82, which is the same as the hot water supply system 100d according to the third embodiment. Therefore, the same parts as those of the other embodiments will be omitted.

FIG. 12 is a flowchart of hot water filling temperature change control in the hot water supply system according to the fourth embodiment. Next, the hot water filling temperature change control for changing the first hot water filling temperature Tf1 will be described with reference to FIG. The hot water filling temperature change control starts at the same time as the hot water filling control described in the second embodiment and ends at the same time as the hot water filling control.

After starting the threshold temperature change control, the process proceeds to step S401. In step S401, the control unit 43 acquires the dressing room room temperature Td, which is the temperature of the air in the dressing room 300. In step S401 of the hot water supply system 100d according to the fourth embodiment, the control unit 43 acquires the temperature detected by the dressing room temperature sensor 82 as the dressing room room temperature Td.

After the process of step S401, the process proceeds to the process of step S402. In step 402, it is determined whether or not the dressing room room temperature Td acquired in step S401 is larger than the predetermined second threshold dressing room room temperature Tdt2. That is, in step S402, the control unit 43 determines whether or not the condition of Td <Tdt2 is satisfied. The second threshold dressing room room temperature Tdt2 is stored in the memory of the control unit 43.

If the control unit 43 determines that the dressing room room temperature Td is larger than the second threshold dressing room room temperature Tdt2 in the process of step S402 (steps S402 and YES), the process proceeds to step S403. In step S403, the control unit 43 sets a predetermined high-temperature hot water filling temperature Tf1a as the first hot water filling temperature Tf1.

If the control unit 43 determines in the process of step S402 that the dressing room room temperature Td is equal to or less than the second threshold dressing room room temperature Tdt2 (steps S402 and NO), the process proceeds to step S404. In step S404, the control unit 43 sets a predetermined low-temperature hot water filling temperature Tf1b as the first hot water filling temperature Tf1. Here, the low temperature hot water filling temperature Tf1b is set to a temperature lower than the high temperature hot water filling temperature Tf1a. Further, the high temperature hot water filling temperature Tf1a and the low temperature hot water filling temperature Tf1b are set to be higher than the second hot water filling temperature Tf2. Further, as described in the second embodiment, the first hot water filling temperature Tf1 is set to the set temperature Ts or less. That is, the high temperature hot water filling temperature Tf1a and the low temperature hot water filling temperature Tf1b are defined so as to satisfy the condition of Ts ≧ Tf1a> Tf1b> Tf2.

After the processing of step S403 or step S404 is completed, the process returns to step S401, and the control unit 43 again acquires the dressing room room temperature Td.

By performing the hot water filling temperature change control at the same time as the hot water filling control described in the second embodiment, the first hot water filling temperature Tf1 in the hot water filling control step S203 shown in FIG. Can be changed. More specifically, when the dressing room room temperature Td is equal to or less than the second threshold undressing room room temperature Tdt2, the first hot water filling temperature Tf1 is higher than when the dressing room room temperature Td is larger than the second threshold undressing room room temperature Tdt2. It is set low, and the temperature of the water supplied to the tub 2 in the hot water filling control becomes low. Therefore, when comparing the case where the dressing room room temperature Td is equal to or less than the second threshold undressing room room temperature Tdt2 and the case where the dressing room room temperature Td is larger than the second threshold undressing room room temperature Tdt2, the former is the bath water temperature Tb. Will be low.

As described above, the configuration of the hot water supply system 100e according to the fourth embodiment is adjacent to the hot water filling means for supplying water to the tub 2 (corresponding to the hot water storage tank 12 and the mixing valve 25) and the bathroom 200 in which the tub 2 is arranged. Information on the room temperature of the undressing room 300 is acquired from the undressing room room temperature detecting means (corresponding to the undressing room temperature sensor 82) that detects the room temperature of the undressing room 300 and the undressing room room temperature detecting means, and is supplied to the bathtub 2 from the hot water filling means. The control unit 43 includes a control unit 43 for controlling the temperature of the water, and the control unit 43 performs control based on the information acquired from the undressing room room temperature detecting means, and controls based on the information acquired from the undressing room room temperature detecting means. From the temperature of the water supplied to the tub 2 from the hot water filling means (corresponding to the high temperature hot water filling temperature Tf1a) when the undressing room room temperature Td obtained from the undressing room room temperature detecting means is larger than the second threshold undressing room room temperature Tdt2. When the undressing room room temperature Td acquired by the control unit 43 from the undressing room room temperature detecting means is equal to or less than the second threshold undressing room room temperature Tdt2, the temperature of the water supplied from the hot water filling means to the bath 2 (low temperature hot water filling temperature Tf1b). Is a configuration that includes control to lower the temperature. Among the above configurations, when the undressing room room temperature Td acquired by the control unit 43 from the undressing room room temperature detecting means is larger than the second threshold undressing room room temperature Tdt2, the temperature of the water supplied from the hot water filling means to the tub 2 is controlled. When the undressing room room temperature Td obtained from the undressing room room temperature detecting means is equal to or lower than the second threshold undressing room room temperature Tdt2, the temperature of the water supplied from the hot water filling means to the bathtub 2 is set to be lower. Therefore, since the hot water supply system 100e of the fourth embodiment lowers the temperature of the bath water when the room temperature of the dressing room is low, it has an effect of suppressing the occurrence of a heat shock phenomenon caused by a sudden temperature change.

Further, the configuration of the hot water supply device 1e according to the fourth embodiment includes a hot water filling means (corresponding to the hot water storage tank 12 and the mixing valve 25) for supplying water to the bathtub 2 arranged in the bathroom 200, and the room temperature of the dressing room 300. Is larger than the second threshold undressing room room temperature Tdt2, the room temperature of the undressing room 300 adjacent to the bathroom 200 is second than the temperature of the water supplied to the bath 2 from the hot water filling means (corresponding to the high temperature hot water filling temperature Tf1a). The temperature of the water supplied to the bathtub 2 from the hot water filling means (corresponding to the low temperature hot water filling temperature Tf1b) is a low value when the room temperature is Tdt2 or less. The hot water supply device 1e according to the fourth embodiment can exhibit the same effect as the effect described in the configuration of the hot water supply system 100e according to the fourth embodiment by the configuration.

Further, the configuration of the control method of the hot water supply system 100e according to the fourth embodiment is the undressing room 300 obtained by acquiring the room temperature of the undressing room 300 adjacent to the bathroom 200 in which the tub 2 is arranged (corresponding to the undressing room room temperature Td). In the tenth step (corresponding to steps S401 and S402) in which the room temperature of the undressing chamber 300 is compared with the second threshold undressing room room temperature Tdt2, and in the tenth step, the room temperature of the undressing chamber 300 is larger than the second threshold undressing room room temperature Tdt2. In this case, the eleventh step (corresponding to step S403) in which the predetermined high-temperature hot water filling temperature Tf1a is set to the temperature of the water supplied from the hot water filling means to the bathtub 2, and the tenth step of the dressing room 300 When the room temperature is equal to or less than the room temperature Tdt2 of the second threshold undressing room, the low temperature hot water filling temperature Tf1b set to a value lower than the high temperature hot water filling temperature Tf1a is set as the temperature of the water supplied to the bath 2 from the hot water filling means. The configuration includes a twelfth step (corresponding to step S404). The control method of the hot water supply system 100e according to the fourth embodiment can produce the same effect as the effect described in the configuration of the hot water supply system 100e according to the fourth embodiment by the configuration.

Further, the configuration of the hot water supply system 100e, the configuration of the hot water supply device 1e, and the configuration of the control method of the hot water supply system 100e according to the fourth embodiment are the configuration of the hot water supply system 100c and the configuration of the hot water supply device 1c according to the above-described second embodiment. It may be an additional configuration to the configuration of the control method of the hot water supply system 100c. Further, the configuration of the hot water supply system 100e, the configuration of the hot water supply device 1e, and the configuration of the control method of the hot water supply system 100e according to the fourth embodiment are the configuration of the hot water supply system 100d and the configuration of the hot water supply device 1d according to the above-described third embodiment. It may be an additional configuration to the configuration of the hot water supply system 100c, the configuration of the hot water supply device 1c, and the configuration of the control method of the hot water supply system 100c according to the second embodiment to which the configuration of the control method of the hot water supply system 100d is added.

Embodiment 5.
Next, the hot water supply system 100f according to the fifth embodiment will be described. The hot water supply system 100f according to the fifth embodiment is different from the hot water supply system 100 according to the first embodiment in that it controls the bathing time. Since the hot water supply system 100f according to the fifth embodiment has the same configuration as the hot water supply system 100 according to the first embodiment except that the control at the time of bathing is performed, the same part as that of the first embodiment is omitted. do.

FIG. 13 is a flowchart of bathing control in the hot water supply system according to the fifth embodiment. Next, a bathing control that changes the control according to whether or not a person is taking a bath will be described with reference to FIG. The bathing control starts at the same time as the post-hot water filling control described in the first embodiment, and ends at the same time as the hot water filling post-control.

After the start of bathing control, the process proceeds to step S501. In step S501, the control unit 43 determines whether or not a person is present in the bathroom 200. Examples of the judgment method include the following methods. When a person enters the bathtub 2 in which the bath water is stored, the water level of the bath water stored in the bathtub 2 rises. Therefore, the control unit 43 acquires information on the water level from the water level sensor 19, and when the water level included in the acquired information is equal to or higher than a predetermined threshold water level, the control unit 43 determines that a person is present in the bathroom 200. 43 determines, and if the water level included in the acquired information is lower than the predetermined threshold water level, the control unit 43 determines that no person is present in the bathroom 200.

If the control unit 43 determines in the process of step S501 that a person is present in the bathroom 200 (steps S501 and YES), the process proceeds to the process of step S502. In step S502, the control unit 43 stops the acquisition of information from the dressing room person detecting means 81. That is, since the control unit 43 does not acquire information from the dressing room person detecting means 81 after the processing of step S502, the control unit 43 enters the dressing room 300 in step S101 of the post-filling control shown in FIG. The control after filling with hot water is stopped in step S101 without determining whether or not the room is present.

After the process of step S502, the process proceeds to step S503. In step S503, the control unit 43 acquires the temperature Tb of the bath water. Since the specific acquisition method is the same as the content described in step S102 of the control after filling with hot water shown in FIG. 6, the description thereof will be omitted.

After the process of step S503, the process proceeds to the process of step S504. In step S504, the control unit 43 determines whether or not the temperature Tb of the bath water acquired in step S503 is lower than the set temperature Ts. That is, in step S504, the control unit 43 determines whether or not the condition of Tb <Ts is satisfied.

When the control unit 43 determines that the temperature Tb of the bath water is lower than the set temperature Ts in the process of step S504 (steps S504 and YES), the process proceeds to the process of step S505. In step S505, the control unit 43 controls each configuration of the hot water supply device 1f so as to perform the reheating operation. That is, when the reheating operation is performed immediately before the processing of step S505, the control unit 43 continues the reheating operation, and when the reheating operation is not performed immediately before the processing of step S505, various valves are pressed. As described in the first embodiment, the switching heat source pump 13 and the bath circulation pump 14 are operated.

When the control unit 43 determines that the temperature Tb of the bath water is equal to or higher than the set temperature Ts in the process of step S504 (steps S504 and NO), the process proceeds to the process of step S506. In step S506, the control unit 43 controls each configuration of the hot water supply device 1f so as not to perform the reheating operation. That is, when the reheating operation is performed immediately before the processing in step S506, the control unit 43 stops the heat source pump 13 and the bath circulation pump 14 to stop the reheating operation, and follows immediately before the processing in step S506. When the heating operation is not performed, the control unit 43 performs the next process without performing the reheating operation.

After the processing of step S506 or step S505 is completed, the process returns to step S501 and the control unit 43 again determines whether or not a person is taking a bath.

If the control unit 43 determines in the process of step S501 that no person is present in the bathroom (steps S501 and NO), the process proceeds to step S507. In step S507, the control unit 43 acquires information from the dressing room person detecting means 81. That is, when the process of step S507 is performed after the process of step S502, the control unit 43 resumes the acquisition of information from the dressing room person detecting means 81 and stops at step S101 shown in FIG. The post-filling control in the state of being filled with water is performed in step S101.

After the process of step S507 is completed, the process returns to step S501, and the control unit 43 again determines whether or not a person is taking a bath.

As described above, the hot water supply system 100f according to the fifth embodiment is provided with a bathroom person detecting means (corresponding to the water level sensor 19) for detecting the presence of a person in the bathroom 200 as an additional configuration, and the control unit 43 is a bathroom. Information for determining whether or not a person is present in the bathroom 200 is acquired from the person detecting means, and information for determining whether or not a person is present in the bathroom 200 is acquired from the bathroom person detecting means. In the case (corresponding to steps S501 and YES), control based on the information acquired from the dressing room person detecting means 81 (corresponding to step S104 or step S105) is not performed (corresponding to step S502). Due to the additional configuration, the hot water supply system 100f according to the fifth embodiment is a dressing room person while a person is taking a bath even if another person enters or leaves the dressing room 300 while the person is taking a bath. Since control is not performed based on the information acquired from the detection means 81, it is effective in suppressing the person taking a bath from being subject to unnecessary restrictions.

Further, the hot water supply system 100f according to the fifth embodiment includes, as an additional configuration, a bathroom person detecting means (corresponding to the water level sensor 19) for detecting the presence of a person in the bathroom 200, and the control unit 43 detects the bathroom person. When the information for determining whether or not a person is present in the bathroom 200 is acquired from the means, and the information for determining whether or not a person is present in the bathroom 200 is acquired from the bathroom person detection means ( Step S501, YES is applicable) has a configuration in which information is not acquired from the dressing room person detecting means 81 (step S502 is applicable). With the additional configuration, the same effect as that described in the configuration of the hot water supply system 100f according to the fifth embodiment can be obtained.

Further, the control method of the hot water supply system 100f according to the fifth embodiment includes the thirteenth step (corresponding to step S501) of determining whether or not a person is present in the bathroom as an additional configuration, and the thirteenth step (corresponding to step S501). It has a configuration in which the first step (corresponding to step S101) is not executed when it is determined in the thirteen steps that a person is present in the bathroom. The control method of the hot water supply system 100f according to the fifth embodiment can achieve the same effect as the effect described in the configuration of the hot water supply system 100f according to the fifth embodiment by the additional configuration.

Further, the control method of the hot water supply system 100f according to the fifth embodiment includes the thirteenth step (corresponding to step S501) of determining whether or not a person is present in the bathroom as an additional configuration, and the thirteenth step (corresponding to step S501). It has a configuration in which the second step (corresponding to step S104) and the third step (corresponding to step S105) are not executed when it is determined in the thirteenth step that a person is present in the bathroom. The control method of the hot water supply system 100f according to the fifth embodiment can achieve the same effect as the effect described in the configuration of the hot water supply system 100f according to the fifth embodiment by the additional configuration.

Next, a modified example of the hot water supply system 100f according to the fifth embodiment will be described.

In the hot water supply system 100f according to the fifth embodiment, the water level sensor 19 is used as the bathroom person detection means, but the present invention is not limited to this. The bathroom person detection means may be any means for detecting that a person is in the bathroom, and may be, for example, an infrared sensor that detects a person in the bathroom with infrared rays or an illuminance sensor that detects the illuminance in the bathroom.

Further, the bathing control described in the hot water supply system 100f according to the fifth embodiment is the hot water supply system 100a according to the first modification of the first embodiment, the hot water supply system 100b according to the second modification of the first embodiment, and the like. It may be added to the hot water supply system 100c according to the second embodiment, the hot water supply system 100d according to the third embodiment, or the hot water supply system 100e according to the fourth embodiment.

In particular, the hot water supply system according to the modified example of the fifth embodiment in which the bathing control is added to the hot water supply system 100c according to the second embodiment has, as an additional configuration, a bathroom person detecting means for detecting the presence of a person in the bathroom 200. (Corresponding to the water level sensor 19), the control unit 43 acquires information for determining whether or not a person is present in the bathroom 200 from the bathroom person detecting means, and the person is sent to the bathroom 200 from the bathroom person detecting means. When the information determined to be in the room is acquired (steps S501 and YES are applicable), the control based on the information acquired from the undressing room person detecting means 81 (step S203 or step S204 is applicable) is performed. It has a configuration that does not (corresponding to step S502). The hot water supply system according to the modified example of the fifth embodiment can exhibit the same effect as the effect described in the configuration of the hot water supply system 100f according to the fifth embodiment by the additional configuration.

Further, the control method of the hot water supply system according to the modification of the fifth embodiment described above corresponds to the thirteenth step (step S501) of determining whether or not a person is present in the bathroom as an additional configuration. ) And the configuration in which the fourth step (corresponding to step S203) and the fifth step (corresponding to step S204) are not executed when it is determined in the thirteenth step that a person is present in the bathroom. Have. The control method of the hot water supply system according to the modified example of the fifth embodiment can achieve the same effect as the effect described in the configuration of the hot water supply system 100f according to the fifth embodiment by the additional configuration.

Embodiment 6.
Next, 100 g of the hot water supply system according to the sixth embodiment will be described. The hot water supply system 100g according to the sixth embodiment is different from the hot water supply system 100d according to the third embodiment in that it controls the bathing time. The hot water supply system 100g according to the sixth embodiment is the same as the hot water supply system 100d according to the third embodiment except that the hot water supply system 100g is controlled at the time of bathing. Further, the bathing control of the hot water supply system 100g according to the sixth embodiment is the same as the bathing control of the hot water supply system 100f according to the fifth embodiment except for the processing of step S508 and step S509 described later. Therefore, the same parts as those of the other embodiments will be omitted.

FIG. 14 is a flowchart of bathing control in the hot water supply system according to the sixth embodiment. A bathing control that changes the control according to whether or not a person is taking a bath will be described. The bathing control starts at the same time as the post-hot water filling control described in the first embodiment, and ends at the same time as the hot water filling post-control. The threshold temperature change control described in the third embodiment also starts at the same time as the post-filling control and ends at the same time as the post-filling control.

After the process of step S502 is completed, the process proceeds to step S508. In step S508, the control unit 43 stops the acquisition of the dressing room room temperature Td from the dressing room temperature sensor 82. That is, since the control unit 43 does not acquire the dressing room room temperature Td from the dressing room temperature sensor 82 after the processing of step S508, the control unit 43 sets the dressing room room temperature Td in S301 of the threshold temperature change control shown in FIG. It is not acquired, and the threshold temperature change control is stopped in step S301. After the process of step S508 is completed, the process proceeds to step S503.

After the process of step S507 is completed, the process proceeds to the process of step S509. In step S509, the control unit 43 acquires the dressing room room temperature Td from the dressing room temperature sensor 82. That is, when the process of step S507 is performed after the process of step S508, the control unit 43 restarts the acquisition of the dressing room room temperature Td from the dressing room temperature sensor 82 and stops at step S301 shown in FIG. The threshold temperature change control in this state performs the process of step S301.

As described above, the hot water supply system 100g according to the sixth embodiment is provided with a bathroom person detecting means (corresponding to the water level sensor 19) for detecting the presence of a person in the bathroom 200 as an additional configuration, and the control unit 43 is a bathroom. Information for determining whether or not a person is present in the bathroom 200 is acquired from the person detecting means, and information for determining whether or not a person is present in the bathroom 200 is acquired from the bathroom person detecting means. In the case (corresponding to steps S501 and YES), control based on the information acquired from the dressing room room temperature detecting means (corresponding to the dressing room temperature sensor 82) (corresponding to steps S303 and S304) is not performed (corresponding to step S508). Has a configuration. Due to the additional configuration, the hot water supply system 100 g according to the sixth embodiment controls based on the room temperature of the dressing room while the person is bathing even if the temperature of the dressing room 300 changes while the person is bathing. Since it is not performed, it has the effect of suppressing the person taking a bath from being subject to unnecessary restrictions.

Further, the hot water supply system 100 g according to the sixth embodiment is provided with a bathroom person detecting means (corresponding to the water level sensor 19) for detecting the presence of a person in the bathroom 200 as an additional configuration, and the control unit 43 detects the bathroom person. When the information for determining whether or not a person is present in the bathroom 200 is acquired from the means, and the information for determining whether or not a person is present in the bathroom 200 is acquired from the bathroom person detection means ( Step S501 and YES) have a configuration in which information is not acquired from the dressing room room temperature detecting means (corresponding to the dressing room temperature sensor 82) (corresponding to step S508). With the additional configuration, the same effect as that described in the configuration of the hot water supply system 100g according to the sixth embodiment can be obtained.

Further, the control method of the hot water supply system 100 g according to the sixth embodiment includes the thirteenth step (corresponding to step S501) of determining whether or not a person is present in the bathroom as an additional configuration. It has a configuration in which the eighth step (corresponding to step S303) and the ninth step (corresponding to step S304) are not executed when it is determined in the thirteenth step that a person is present in the bathroom. The control method of the hot water supply system 100g according to the sixth embodiment can achieve the same effect as the effect described in the configuration of the hot water supply system 100g according to the sixth embodiment by the additional configuration.

Further, the control method of the hot water supply system 100 g according to the sixth embodiment includes the thirteenth step (corresponding to step S501) of determining whether or not a person is present in the bathroom as an additional configuration. It has a configuration in which the seventh step (corresponding to steps S301 and S302) is not executed when it is determined in the thirteenth step that a person is present in the bathroom. The control method of the hot water supply system 100g according to the sixth embodiment can achieve the same effect as the effect described in the configuration of the hot water supply system 100g according to the sixth embodiment by the additional configuration.

The bathing control described in the hot water supply system 100g according to the sixth embodiment may be added to the hot water supply system 100e according to the fourth embodiment.

That is, as an additional configuration, the hot water supply system according to the modified example of the sixth embodiment in which the bathing time control is added to the hot water supply system 100e according to the fourth embodiment is a bathroom person detection that detects the presence of a person in the bathroom 200. A means (corresponding to the water level sensor 19) is provided, and the control unit 43 acquires information for determining whether or not a person is present in the bathroom 200 from the bathroom person detecting means, and the person in the bathroom 200 is obtained from the bathroom person detecting means. When the information determined to be in the room is acquired (steps S501 and YES are applicable), the control based on the information acquired from the undressing room room temperature detecting means (step S403 or step S404 is applicable) is performed. It has a configuration that does not (corresponding to step S508). The hot water supply system according to the modified example of the sixth embodiment can exhibit the same effect as the effect described in the configuration of the hot water supply system 100 g according to the sixth embodiment by the additional configuration.

Further, the control method of the hot water supply system according to the modified example of the sixth embodiment described above corresponds to the thirteenth step (step S501) of determining whether or not a person is present in the bathroom as an additional configuration. ), And when it is determined in the thirteenth step that a person is present in the bathroom, the eleventh step (corresponding to step S403) and the twelfth step (corresponding to step S404) are not executed. Has a configuration. The control method of the hot water supply system according to the modified example of the fifth embodiment can achieve the same effect as the effect described in the configuration of the hot water supply system 100 g according to the sixth embodiment by the additional configuration.

Further, in the hot water supply systems 100, 100a to 100 g described in the above embodiments 1 to 6, the dressing room person detecting means and the dressing room temperature detecting means are used to perform post-filling control, hot water filling control, and threshold temperature change. Control and hot water filling temperature change control are performed. In addition to that, the bathroom person detecting means for detecting information for determining whether or not a person is present in the bathroom and the bathroom temperature detecting means for detecting the temperature of the bathroom are provided, and the embodiments 1 to 6 have been described. After the second hot water filling, the undressing room person detecting means and the undressing room temperature detecting means of the hot water filling control, the hot water filling control, the threshold temperature change control, and the hot water filling temperature change control are replaced with the bathroom person detecting means and the bathroom temperature detecting means. A configuration may be added to execute the control, the second hot water filling control, the second threshold temperature change control, and the second hot water filling temperature change control. In this case, either one of the post-filling control and the second post-filling control, one of the hot water filling control and the second post-filling control, and one of the threshold temperature change control and the second threshold temperature change control. On the other hand, one of the hot water filling temperature change control and the second hot water filling temperature change control is executed, respectively. Then, which control is executed can be determined by a human operation from the operation units 51 and 61, and the executed control is notified from the notification unit 62. That is, the hot water supply systems 100, 100a to 100g described in the first to sixth embodiments have, as an additional configuration, an operation unit that accepts a person's operation and information for determining whether or not a person is present in the bathroom. It is provided with at least one of a bathroom person detecting means for detecting a bathroom person or a bathroom temperature detecting means for detecting a bathroom temperature, and the control unit uses a bath water temperature raising means or a hot water filling means as a detection content of the bathroom person detecting means or the bathroom temperature detecting means. The bath water temperature rising means or the hot water filling means is controlled from the operation unit based on the detection contents of the dressing room person detecting means or the dressing room temperature controlling means, or the bathroom person detecting means or the bathroom. A configuration may be provided in which a person can operate whether to perform control based on the detection content of the temperature detecting means. Further, the hot water supply systems 100, 100a to 100g described in the first to sixth embodiments have, as an additional configuration, an operation unit that accepts a person's operation and information for determining whether or not a person is present in the bathroom. It is provided with at least one of a bathroom person detecting means for detecting a bathroom person or a bathroom temperature detecting means for detecting a bathroom temperature, and the control unit uses a bath water temperature raising means or a hot water filling means as a detection content of the bathroom person detecting means or the bathroom temperature detecting means. Is the bath water temperature rising means or hot water filling means controlled based on the detection contents of the undressing room person detecting means or the undressing room temperature controlling means from the notification unit? Bathroom person detecting means or bathroom A configuration may be provided for notifying whether or not the control is performed based on the detection content of the temperature detecting means.

1 Hot water supply device, 1a to 1g Hot water supply device, 2 Bathtub, 2a Bathtub water inlet, 2b Bathtub water outlet, 3 Bathtub outflow piping, 4 Bathtub return piping, 5 First remote control device, 6 Second remote control device, 7 Bathroom air conditioning Equipment, 8 undressing room air conditioner, 9 external communication device, 11 heating unit, 12 hot water storage tank, 12a first tank upper inflow port, 12b second tank upper inflow port, 12c tank middle inflow port, 12d first tank Lower inflow port, 12e Second tank lower inflow port, 12f Third tank lower inflow port, 13 Heat source pump, 14 Bath circulation pump, 15 Bath heat exchanger, 16 Flow sensor, 17 Bath going temperature sensor, 18 Bath Return temperature sensor, 19 water level sensor, 20 flow switch, 21 pressure reducing valve, 22 first four-way valve, 23 second four-way valve, 24 three-way valve, 25 mixing valve, 26 electromagnetic valve, 27 first water supply pipe, 28 2nd water supply pipe, 29 tank lower water outlet pipe, 30 heating unit going pipe, 31 heating unit return pipe, 32 bypass pipe, 33 1st hot water pipe, 34 2nd hot water pipe, 35 3rd hot water pipe, 36 4th hot water pipe, 37 5th hot water pipe, 38 hot water outlet pipe, 39 bath pipe, 40 hot water supply device inner bathtub return pipe, 41 hot water supply device inner bathtub return pipe, 42 circulation pipe, 43 control unit, 51 operation unit , 52 Notification unit, 61 Operation unit, 62 Notification unit, 81 Undressing room person detection means, 82 Undressing room temperature sensor, 100 hot water supply system, 100a to 100g hot water supply system, 200 bathroom, 300 undressing room.

Claims (9)

A means for raising the temperature of bath water that raises the temperature of the bath water stored in the bathtub,
The bath water temperature detecting means for detecting the temperature of the bath water and the bath water temperature detecting means
A dressing room person detecting means for detecting information for determining whether or not a person is present in the dressing room adjacent to the bathroom in which the bathtub is arranged, and a dressing room person detecting means.
Information on the temperature of the bath water is obtained from the bath water temperature detecting means, and information on determining whether or not a person is present in the dressing room is obtained from the dressing room person detecting means, and the bath water temperature raising means is used. The control unit to control and
With
The control unit performs control based on the information acquired from the dressing room person detection means.
The control based on the information acquired from the undressing room person detecting means is described when the control unit acquires information from the undressing room person detecting means for determining that a person is present in the undressing room. Control to raise the temperature of the bath water by the bath water temperature raising means and the control when the temperature of the bath water acquired from the bath water temperature detecting means becomes lower than a predetermined first threshold temperature. When the unit acquires information from the undressing room person detecting means that it is determined that no person is present in the undressing room, the bath water temperature raising means does not raise the temperature of the bath water or the bath water. When the temperature of the bath water obtained from the temperature detecting means becomes lower than the second threshold temperature set to a value lower than the first threshold temperature, the temperature of the bath water is lowered by the bath water temperature raising means. With control to raise, and a hot water supply system that includes. The control based on the information acquired from the undressing room person detecting means is described when the control unit acquires information from the undressing room person detecting means for determining that a person is present in the undressing room. Control to acquire information on the temperature of the bath water from the bath water temperature detecting means, and the control unit acquires information from the undressing room person detecting means to determine that no person is present in the undressing room. The hot water supply system according to claim 1, further comprising a control that does not acquire information on the temperature of the bath water from the bath water temperature detecting means and does not raise the temperature of the bath water by the bath water temperature raising means. A hot water filling means for supplying water to the bathtub is provided.
The control unit controls the temperature of the water supplied from the hot water filling means to the bathtub.
The control based on the information acquired from the dressing room person detecting means is performed when the control unit acquires information from the dressing room person detecting means for determining that a person is present in the dressing room. When the control unit acquires information from the dressing room person detecting means that determines that no person is present in the dressing room than the temperature of the water supplied from the hot water filling means to the bathtub, the hot water is obtained. The hot water supply system according to claim 1 or 2, wherein the temperature of the water supplied from the tensioning means to the bathtub is controlled to be lower. A dressing room room temperature detecting means for detecting the room temperature of the dressing room is provided.
The first threshold temperature is determined by the control unit.
The control unit acquires information on the room temperature of the dressing room from the dressing room room temperature detecting means, and performs control based on the information acquired from the dressing room room temperature detecting means.
The control based on the information acquired from the undressing room room temperature detecting means is performed when the room temperature of the undressing room acquired by the control unit from the undressing room room temperature detecting means is larger than the predetermined first threshold undressing room room temperature. The first threshold temperature when the room temperature of the dressing room acquired by the control unit from the dressing room room temperature detecting means is equal to or lower than the first threshold undressing room room temperature is higher than the first threshold temperature. The hot water supply system according to any one of claims 1 to 3, which includes control set to a low value by a control unit. A dressing room room temperature detecting means for detecting the room temperature of the dressing room,
A hot water filling means for supplying water to the bathtub and
With
The control unit acquired information about the room temperature of the dressing room from the dressing room room temperature detecting means, controlled the temperature of water supplied from the hot water filling means to the bathtub, and acquired it from the dressing room room temperature detecting means. Informed control
For control based on the information acquired from the undressing room room temperature detecting means, when the room temperature of the undressing room acquired by the control unit from the undressing room room temperature detecting means is equal to or higher than a predetermined second threshold undressing room room temperature. When the room temperature of the undressing room acquired by the control unit from the undressing room room temperature detecting means is lower than the temperature of the water supplied from the hot water filling means to the bathtub, the hot water is lower than the room temperature of the second threshold undressing room. The hot water supply system according to any one of claims 1 to 4, wherein the temperature of the water supplied from the tensioning means to the bathtub is controlled to be lower. A bathroom person detection means for detecting the presence of a person in the bathroom is provided.
When the control unit acquires information from the bathroom person detecting means that determines that a person is present in the bathroom, the control unit does not perform control based on the information acquired from the dressing room room temperature detecting means. The hot water supply system according to claim 4 or 5. A bathroom person detection means for detecting the presence of a person in the bathroom is provided.
When the control unit acquires information from the bathroom person detecting means that determines that a person is present in the bathroom, the control unit does not perform control based on the information acquired from the dressing room person detecting means. The hot water supply system according to any one of claims 1 to 6. Equipped with a bath water temperature raising means to raise the temperature of the bath water stored in the bathtub arranged in the bathroom,
When a person is present in the dressing room adjacent to the bathroom, when the temperature of the bath water becomes lower than the predetermined first threshold temperature, the temperature of the bath water is raised by the bath water temperature raising means. When the temperature is raised and no person is present in the dressing room, the bath water temperature raising means does not raise the bath water temperature, or the bath water temperature is set to a value lower than the first threshold temperature. A hot water supply device that raises the temperature of the bath water by the bath water temperature raising means when the temperature becomes lower than the second threshold temperature. The first step to determine if a person is in the dressing room adjacent to the bathroom where the bathtub is located,
When it is determined in the first step that a person is present in the dressing room, the bath water is stored in the bathtub when the temperature of the bath water becomes lower than the predetermined first threshold temperature. The second step of raising the temperature of the bath water by the water temperature raising means,
When it is determined in the first step that no person is present in the dressing room, the bath water temperature raising means does not raise the bath water temperature, or the bath water temperature is the first threshold. The third step of raising the temperature of the bath water by the bath water temperature raising means when the temperature becomes lower than the second threshold temperature set to a value lower than the temperature, and
How to control a hot water supply system.

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