Dressing room floor heating system

Abstract

To provide a dressing room floor heating system capable of performing dressing room floor heating reliably and preventing an occurrence of a cold water sandwich phenomenon while reducing running costs by utilizing hot water discharged from a bathroom for dressing room floor heating.SOLUTION: A dressing room floor heating system includes: a dressing room underfloor hot water flowing unit 3 provided under the floor of a dressing room 2; an operation control unit 4 for executing a dressing room floor heating operation; a hot water supply source switching unit 17 for switching a hot water supply source between a heat source unit 5 and a bathroom drainage unit 9; and a bathroom drainage detection unit 18 for detecting hot water drainage from the bathroom drainage unit 9. The operation control unit 4 executes, as the dressing room floor heating operation, a bathroom drainage floor heating operation in which the supply source of the hot water to the dressing room underfloor hot water flowing unit 3 is set to the bathroom drainage unit 9 while the hot water is discharged from the bathroom drainage unit 9, and executes a heat source unit hot water floor heating operation in which the supply source of the hot water to the dressing room underfloor hot water flowing unit 3 is set to the heat source unit 5 while the hot water is not discharged from the bathroom drainage unit 9.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a changing room floor heating system comprising a changing room underfloor hot water circulation section provided under the floor of a changing room adjacent to a bathroom, and an operation control section capable of executing changing room floor heating operation to supply hot water to the changing room underfloor hot water circulation section to heat the floor of the changing room. [Background technology]

[0002] In recent years, from the viewpoint of preventing heat shock and the like, it has been considered to provide floor heating in changing rooms using hot water generated by a heat source machine. However, using hot water generated by a heat source machine to heat the floor of a changing room increases the amount of energy consumed by the floor heating, resulting in higher running costs, so there is room for improvement in reducing running costs. Therefore, for floor heating in changing rooms, a wastewater-utilizing floor heating system has been proposed that uses hot water above a certain temperature from sources that use hot water, such as sinks and bathrooms, thereby reducing running costs (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 3-61211 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the wastewater-utilizing floor heating device described in Patent Document 1, the floor heating of the dressing room is performed only when hot water is discharged from the sink, bathroom, etc., so if there is no or little hot water discharged from the sink, bathroom, etc., the floor heating of the dressing room may not be performed sufficiently.

[0005] Furthermore, for example, when taking a bath in a bathroom, if the use of a hot water tap or shower (sometimes simply referred to as a "shower" in this application) is temporarily stopped and then restarted, it is known that hot water is initially discharged but quickly becomes cold, and then the temperature gradually returns to the appropriate level, which is known as the "cold water sandwich" phenomenon. Therefore, in order to make bathing using a shower in a bathroom more comfortable, it is desirable to prevent the occurrence of the cold water sandwich phenomenon.

[0006] In view of this situation, the main objective of the present invention is to provide a changing room floor heating system that can reliably heat the changing room floor while reducing running costs by utilizing hot water discharged from the bathroom, and that can prevent the occurrence of the cold water sandwich phenomenon. [Means for solving the problem]

[0007] The first characteristic configuration of the present invention is a changing room underfloor hot water circulating part provided under the floor of a changing room adjacent to a bathroom; an operation control unit capable of supplying hot water to the underfloor hot water circulator in the dressing room to perform a dressing room floor heating operation for heating the floor of the dressing room; a hot water supply source switching unit that switches the source of hot water supplied to the underfloor hot water circulator in the dressing room between a heat source machine that generates hot water and a bathroom drainage unit that discharges hot water from the bathroom; a bathroom drain detection unit that detects the discharge of hot water from the bathroom drain unit, The operation control unit performs, as the changing room floor heating operation, a bathroom drain floor heating operation in which, while the bathroom drain detection unit detects the discharge of hot water from the bathroom drain unit, the hot water supply source switching unit sets the hot water supply source for the changing room underfloor hot water circulation unit to the bathroom drain unit, and, while the bathroom drain detection unit does not detect the discharge of hot water from the bathroom drain unit, the operation control unit performs a heat source machine hot water floor heating operation in which, while the bathroom drain detection unit detects the discharge of hot water from the bathroom drain unit, the hot water supply source switching unit sets the hot water supply source for the changing room underfloor hot water circulation unit to the heat source machine.

[0008] According to this configuration, when performing the changing room floor heating operation, when the shower is started in the bathroom and hot water is discharged from the bathroom drain, the bathroom drain detection unit detects the discharge of hot water from the bathroom drain. Then, while the discharge of hot water from the bathroom drain is detected, the operation control unit performs the bathroom drain floor heating operation as the changing room floor heating operation, and supplies the hot water discharged from the bathroom drain to the changing room underfloor hot water circulator to heat the changing room floor. In other words, while hot water is being discharged from the bathroom drain, the bathroom drain floor heating operation is carried out, and the discharged hot water is used to heat the floor of the changing room, thereby reducing the amount of energy consumed to heat the floor of the changing room and, accordingly, reducing running costs.

[0009] Furthermore, when the shower in the bathroom is temporarily stopped and hot water no longer flows from the bathroom drain, the bathroom drain detector no longer detects the hot water being discharged from the bathroom drain. While hot water is not detected being discharged from the bathroom drain, the operation controller executes the heat source machine hot water floor heating operation as the changing room floor heating operation, and supplies the hot water generated by the heat source machine to the changing room underfloor hot water circulator to heat the changing room floor. In other words, while no hot water is being discharged from the bathroom drain, the heat source machine's hot water floor heating operation is performed, and the hot water generated by the heat source machine is used to heat the floor of the changing room, ensuring that the floor heating of the changing room can continue.

[0010] While the shower is temporarily stopped, hot water is no longer discharged from the bathroom drain, allowing the heat source unit to continue producing hot water as a floor heating system. When the shower is resumed, hot water at the appropriate temperature produced by the heat source unit is instantly supplied to the shower, preventing the cold water sandwich phenomenon caused by the temporary stoppage of shower use.

[0011] As a result, a changing room floor heating system can be provided that can reliably heat the changing room floor while reducing running costs by utilizing the hot water discharged from the bathroom to heat the changing room floor and prevent the cold water sandwich phenomenon from occurring.

[0012] A second characteristic configuration of the present invention is that the operation control unit starts executing the changing room floor heating operation when the bathroom drain detection unit detects that hot water has started to be discharged from the bathroom drain unit after receiving a command to start the changing room floor heating operation.

[0013] With this configuration, even if the time between receiving a command to start the changing room floor heating operation and the start of hot water discharge from the bathroom drain is relatively long, the change room floor heating operation, which would be a heat source unit hot water floor heating operation, is prohibited during that time. This prevents unnecessary changing room floor heating using hot water from the heat source unit, thereby improving energy conservation.

[0014] A third characteristic configuration of the present invention is a bathroom drainage system including a drainage heater that can heat the hot water discharged from the bathroom drainage section, The operation control unit controls the operation of the drain heating unit so that the temperature of the hot water flowing through the underfloor hot water flow unit in the dressing room becomes the set hot water temperature when the bathroom drain floor heating operation is performed.

[0015] With this configuration, even if the temperature of the hot water discharged from the bathroom drain section is lower than the desired set hot water temperature required for floor heating in the changing room, the hot water from the bathroom drain section is heated in the drain heating section so that the hot water temperature becomes the set hot water temperature, so that hot water at the set hot water temperature can be supplied to the hot water circulation section under the floor of the changing room, thereby more reliably implementing floor heating in the changing room.

[0016] A fourth characteristic configuration of the present invention is that after the changing room floor heating operation is completed, the operation control unit sets the hot water supply source for the changing room underfloor hot water circulation section to the heat source machine using the hot water supply source switching unit, and performs a cleaning operation to supply hot water from the heat source machine to the changing room underfloor hot water circulation section and clean the changing room underfloor hot water circulation section.

[0017] According to this configuration, by executing the cleaning operation after the completion of the changing room underfloor heating operation, hot water from the heat source unit can be supplied to the changing room underfloor hot water conduit to clean the changing room underfloor hot water conduit, thereby suppressing the accumulation of impurities contained in the hot water discharged from the bathroom drain in the changing room underfloor hot water conduit and deterioration of the changing room underfloor hot water conduit due to the accumulation of impurities. [Brief explanation of the drawings]

[0018] [Figure 1] Vertical cross section showing the configuration of the changing room floor heating system [Figure 2] Horizontal cross section showing the configuration of the changing room floor heating system [Figure 3] Flowchart for controlling floor heating in the changing room DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment of a dressing room floor heating system according to the present invention will be described below with reference to the drawings.

[0020] As shown in Figure 1, the changing room floor heating system illustrated in this embodiment is equipped with a changing room underfloor hot water circulation section 3 located under the floor of a changing room 2 adjacent to a bathroom 1, and an operation control section 4 capable of performing changing room floor heating operation by supplying hot water to this changing room underfloor hot water circulation section 3 to heat the floor of the changing room 2.

[0021] Bathroom 1 is equipped with a hot water tap 7 and shower 8, which receive hot water from a heat source machine 5 that generates hot water through hot water supply piping 6, a bathroom drain 9 that discharges the hot water discharged into bathroom 1 from bathroom 1, and a bathroom remote control 10. Dressing room 2 is equipped with a dressing room remote control 11 and the like.

[0022] As shown in Figures 1 and 2, drainage pipe 12 is connected to bathroom drainage section 9, and guides the hot water discharged from bathroom drainage section 9 to changing room underfloor hot water circulation section 3. A hot water pipe 13, which branches off from hot water supply pipe 6 and guides hot water from heat source unit 5 to changing room underfloor hot water circulation section 3, is connected to the connection point of drainage pipe 12 with changing room underfloor hot water circulation section 3.

[0023] The changing room underfloor hot water circulation section 3 is equipped with a hot water circulation space 14 formed under the floor of the changing room 2, and a distribution and discharge section 15 that distributes and discharges hot water guided by the hot water piping 13 and the drainage piping 12 into the hot water circulation space 14. As a result, the changing room underfloor hot water circulation section 3 is configured to distribute and discharge hot water generated by the heat source unit 5 or hot water discharged from the bathroom drainage section 9 from the distribution and discharge section 15 into the hot water circulation space 14 and cause it to circulate in the hot water circulation space 14, thereby providing underfloor heating for the changing room 2. A water gradient is provided on the bottom surface of the hot water circulation space 14 so that the hot water dispersed and discharged from the distribution and discharge section 15 is guided to and discharged from the drain outlet 16 of the hot water circulation space 14. Furthermore, instead of the hot water flow space 14, the changing room underfloor hot water circulation section 3 may be provided with, for example, a heat dissipation pipe that is laid in a serpentine manner under the floor of the changing room 2, and the hot water generated by the heat source unit 5 or the hot water discharged from the bathroom drain section 9 may be passed through the heat dissipation pipe to perform floor heating for the changing room 2.

[0024] The bathroom remote control 10 and the changing room remote control 11 are provided with operation switches 10A and 11A for starting and stopping the changing room floor heating operation. That is, when a start operation is performed on operation switch 10A or 11A to stop the changing room floor heating operation, the bathroom remote control 10 and the changing room remote control 11 send an operation start command for the changing room floor heating operation to the operation control unit 4, and when a stop operation is performed on operation switch 10A or 11A to stop the changing room floor heating operation while the changing room floor heating operation is being performed, the bathroom remote control 10 and the changing room remote control 11 send an operation stop command for the changing room floor heating operation to the operation control unit 4.

[0025] 1 , hot water piping 13, which conducts hot water from the heat source unit 5 to the changing room underfloor hot water circulator 3, is provided with an on-off valve 17 that can interrupt the supply of hot water from the heat source unit 5 to the changing room underfloor hot water circulator 3. The on-off valve 17 provided on this hot water piping 13 functions as a hot water supply source switching unit that can switch the source of hot water supplied to the changing room underfloor hot water circulator 3 between the heat source unit 5 that generates hot water and the bathroom drain 9 that discharges hot water from the bathroom 1. In other words, by closing the on-off valve 17, the water supply from the heat source unit 5 to the changing room underfloor hot water circulator 3 is stopped, and the source of hot water supplied to the changing room underfloor hot water circulator 3 is set to the bathroom drain 9 only. In addition, by opening the on-off valve 17, hot water is supplied from the heat source unit 5 to the changing room underfloor hot water circulating section 3, and the heat source unit 5 becomes a source of hot water for the changing room underfloor hot water circulating section 3. In this embodiment, when the on-off valve 17 is open, hot water can be supplied from the bathroom drain section 9 to the changing room underfloor hot water circulation section 3; however, an on-off valve may be provided upstream of the connection point with the hot water piping 13 in the drainage piping 12, and by closing the on-off valve, the supply of hot water from the bathroom drain section 9 to the changing room underfloor hot water circulation section 3 may be prohibited. Furthermore, the on-off valve 17 may be, for example, a three-way valve that is provided at the connection between the changing room underfloor hot water flow section 3, the drainage pipe 12, and the hot water pipe 13, thereby allowing the source of hot water supply to the changing room underfloor hot water flow section 3 to be switched between the heat source unit 5 and the bathroom drainage section 9.

[0026] Drain pipe 12 is equipped with bathroom drain detection unit 18 that detects the discharge of hot water from bathroom drain section 9, water temperature detection unit 19 that detects the temperature of the hot water flowing through drain pipe 12, and drain heating unit 20 that can heat the hot water discharged from bathroom drain section 9. Drain heating unit 20 can be a heat exchanger that heats the hot water discharged from bathroom drain section 9 by exchanging heat with hot water generated by heat source unit 5, or an electric heater that heats the hot water discharged from bathroom drain section 9 with an electric heating wire.

[0027] The operation control unit 4 is equipped with a changing room floor heating control means 4A that starts changing room floor heating operation when it receives a command to start changing room floor heating operation transmitted from the bathroom remote control 10 or the changing room remote control 11, and ends changing room floor heating operation when it receives a command to stop changing room floor heating operation transmitted from the bathroom remote control 10 or the changing room remote control 11. The changing room floor heating control means 4A is configured to be able to selectively execute two changing room floor heating operations that can be executed in changing room floor heating control: a bathroom drainage floor heating operation that uses hot water discharged from the bathroom drain unit 9 to heat the floor of the changing room 2, and a heat source unit hot water floor heating operation that uses hot water generated by the heat source unit 5 to heat the floor of the changing room 2.

[0028] That is, in the bathroom drainage floor heating operation, the supply of hot water from the heat source unit 5 to the changing room underfloor hot water circulation section 3 is stopped by closing the on-off valve 17, which functions as the hot water supply source switching section, and the hot water supply source for the changing room underfloor hot water circulation section 3 is set to the bathroom drainage section 9. The hot water discharged from the bathroom drainage section 9 is supplied to the changing room underfloor hot water circulation section 3, and the floor heating of the changing room 2 is performed. On the other hand, during heat source machine hot water floor heating operation, hot water is supplied from the heat source machine 5 to the changing room underfloor hot water circulation section 3 by opening the on-off valve 17, which functions as a hot water supply source switching section, and with the hot water supply source for the changing room underfloor hot water circulation section 3 set to the heat source machine 5, the hot water generated by the heat source machine 5 is supplied to the changing room underfloor hot water circulation section 3 to perform floor heating for the changing room 2.

[0029] The changing room floor heating control means 4A determines whether or not hot water is being discharged from the bathroom drain section 9 based on detection by the bathroom drain detection section 18. Then, the changing room floor heating control means 4A performs the above-mentioned bathroom drain floor heating operation while the bathroom drain detection section 18 detects that hot water is being discharged from the bathroom drain section 9, and performs the above-mentioned heat source machine hot water floor heating operation while the bathroom drain detection section 18 does not detect that hot water is being discharged from the bathroom drain section 9. Then, when the bathroom drain floor heating operation is being performed, the control means 4A for changing room floor heating determines, based on detection by the water temperature detection unit 19, whether the temperature of the hot water supplied from the bathroom drain unit 9 to the changing room underfloor hot water circulation unit 3 has reached the set hot water temperature, and if the set hot water temperature has not been reached, controls the operation of the drain heating unit 20 to perform a discharge hot water heating process to heat the hot water supplied from the bathroom drain unit 9 to the changing room underfloor hot water circulation unit 3 so that the hot water temperature supplied to the changing room underfloor hot water circulation unit 3 becomes the set hot water temperature.

[0030] In addition, at the end of the changing room floor heating operation, the control means 4A for floor heating in the changing room opens the on-off valve 17, which functions as a hot water supply source switching unit, for example for a predetermined period of time, thereby supplying hot water from the heat source unit 5 to the changing room underfloor hot water circulation unit 3, and with the hot water supply source for the changing room underfloor hot water circulation unit 3 set to the heat source unit 5, a cleaning operation is performed in which hot water is supplied from the heat source unit 5 to the changing room underfloor hot water circulation unit 3 to clean the changing room underfloor hot water circulation unit 3. In this embodiment, the cleaning operation is performed when the changing room floor heating operation is completed, but this is not limited to this. For example, the cleaning operation may be performed by any operation of an operation switch that commands the execution of the cleaning operation, or the cleaning operation may be omitted.

[0031] Hereinafter, the details of the changing room floor heating control executed by the changing room floor heating control means 4A will be described based on the flowchart of FIG.

[0032] In response to the input of an operation start command (yes in step #01), the changing room floor heating control means 4A performs an operation start determination (step #02) to determine whether or not to start changing room floor heating operation. In this operation start determination (step #02), the start of changing room floor heating operation is prohibited from the time the operation start command is input until the bathroom drain detection unit 18 detects the first discharge of hot water from the bathroom drain unit 9 (no in step #02), and the start of changing room floor heating operation is permitted when the bathroom drain detection unit 18 detects the first discharge of hot water from the bathroom drain unit 9 (yes in step #02).

[0033] If the start of the undressing room floor heating operation is permitted by the above operation start determination (yes in step #02), a hot water discharge determination (step #03) is performed to determine whether the bathroom drain detection unit 18 has detected the discharge of hot water from the bathroom drain unit 9. Then, during this hot water discharge determination (step #03), while the discharge of hot water from the bathroom drain unit 9 is detected (yes in step #03), the bathroom drain floor heating operation (step #04) described above is executed as the undressing room floor heating operation. Furthermore, while the bathroom drain detection unit 18 has not detected the discharge of hot water from the bathroom drain unit 9 (no in step #03), the heat source machine hot water floor heating operation (step #05) described above is executed as the undressing room floor heating operation.

[0034] Then, during bathroom drain floor heating operation (step #04), the aforementioned discharge hot water heating process is performed appropriately to maintain the temperature of the hot water supplied from the bathroom drain section 9 to the changing room underfloor hot water circulation section 3 at the set hot water temperature.

[0035] Thereafter, during execution of the above-mentioned bathroom drain floor heating operation (step #04) or heat source machine hot water floor heating operation (step #05), if a command to stop the changing room floor heating operation is received from the bathroom remote control 10 or the changing room remote control 11 (yes in step #06), the changing room floor heating operation being executed is terminated (step #07), and after that is terminated, the above-mentioned cleaning operation (step #08) is executed to clean the changing room underfloor hot water circulator 3 using the hot water generated by the heat source machine 5. Also, if a command to stop the changing room floor heating operation is not received (no in step #06), the process proceeds to the hot water discharge determination in step #03 and execution of the changing room floor heating operation continues.

[0036] As described above, in the changing room floor heating system exemplified in this embodiment, for example, when a user performs an operation start operation operation on operation switches 10A, 11A of bathroom remote control 10 or changing room remote control 11, changing room floor heating operation is started by operation control unit 4. Thereafter, for example, when use of shower 8 is started in bathroom 1 and hot water is discharged from bathroom drain unit 9, bathroom drain detection unit 18 detects the discharge of hot water from bathroom drain unit 9. Then, in response to this detection, execution of changing room floor heating operation is permitted by operation control unit 4, and while the discharge of hot water from bathroom drain unit 9 is detected, operation control unit 4 executes bathroom drain floor heating operation as changing room floor heating operation, supplying the hot water discharged from bathroom drain unit 9 to changing room underfloor hot water circulator 3 to heat the floor of changing room 2.

[0037] Furthermore, for example, if the use of the shower 8 in the bathroom 1 is temporarily stopped and hot water no longer discharges from the bathroom drain section 9, the bathroom drain detection section 18 will no longer detect the discharge of hot water from the bathroom drain section 9. Then, in response to this detection, while hot water is not being detected being discharged from the bathroom drain section 9, the operation control section 4 executes the heat source machine hot water floor heating operation as the changing room floor heating operation, and uses the hot water generated by the heat source machine 5 to heat the floor of the changing room 2.

[0038] In other words, while hot water is being discharged from the bathroom drain section 9, the bathroom drain floor heating operation is carried out, and the discharged hot water is used to heat the floor of the dressing room 2, thereby reducing the amount of energy consumed to heat the floor of the dressing room 2 and, accordingly, reducing running costs.

[0039] In addition, while no hot water is being discharged from the bathroom drain 9, the heat source machine hot water floor heating operation is carried out, and the hot water generated by the heat source machine 5 is used to heat the floor of the dressing room 2, thereby ensuring that the floor heating of the dressing room 2 can continue.

[0040] While use of the shower 8 in the bathroom 1 is temporarily stopped, hot water is no longer discharged from the bathroom drain 9, and the heat source unit hot water floor heating operation is executed, allowing the heat source unit 5 to continue producing hot water. As a result, when use of the shower 8 in the bathroom 1 is resumed, hot water of the appropriate temperature produced by the heat source unit 5 is instantly supplied to the shower 8, preventing the so-called cold water sandwich phenomenon that occurs when use of the shower 8 is temporarily stopped.

[0041] As a result, a changing room floor heating system can be provided that can reliably heat the floor of the changing room 2 while reducing running costs by utilizing the hot water discharged from the bathroom 1 to heat the floor of the changing room 2 and prevent the occurrence of the cold water sandwich phenomenon.

[0042] Furthermore, in the changing room floor heating system exemplified in this embodiment, the operation control unit 4 will start executing the changing room floor heating operation when it receives a command to start changing room floor heating operation and the bathroom drain detection unit 18 detects that hot water has started to be discharged from the bathroom drain unit 9.

[0043] That is, for example, execution of the changing room floor heating operation is prohibited from the time when a command to start changing room floor heating operation is received until hot water starts to be discharged from the bathroom drain 9. This makes it possible to avoid unnecessary floor heating of the changing room 2 by heat source machine hot water floor heating operation using hot water from the heat source machine 5 from the time when a command to start changing room floor heating operation is received until hot water starts to be discharged from the bathroom drain 9, thereby improving energy conservation.

[0044] Furthermore, even if the temperature of the hot water discharged from the bathroom drain section 9 is lower than the desired set hot water temperature required for floor heating in the changing room 2 when the bathroom drain floor heating operation is performed, when the hot water flows through the drain pipe 12, it is heated in the drain heating section 20 so that the hot water temperature becomes the set hot water temperature, and hot water at the set hot water temperature can be supplied to the changing room underfloor hot water flow section 3, thereby more reliably carrying out floor heating in the changing room 2.

[0045] Then, by executing the cleaning operation after the completion of the changing room underfloor heating operation, hot water from the heat source unit 5 is supplied to the changing room underfloor hot water circulator 3, thereby cleaning the changing room underfloor hot water circulator 3. As a result, it is possible to suppress the accumulation of impurities contained in the hot water discharged from the bathroom drain 9 in the changing room underfloor hot water circulator 3 and the deterioration of the changing room underfloor hot water circulator 3 due to the accumulation of impurities.

[0046] [Another embodiment] Another embodiment of the present invention will now be described. The configurations of the other embodiments described below are not limited to being applied alone, but can also be applied in combination with the configurations of the above-described embodiment or other other embodiments.

[0047] (1) In the above embodiment, the changing room floor heating system is configured so that the drain pipe 12 connecting the bathroom drain section 9 and the changing room underfloor hot water circulation section 3 is always open. However, this is not limited to this, and the system may be configured so that, for example, the drain pipe 12 is open only when the bathroom drain floor heating operation is being performed, and the drain pipe 12 is closed and the bathroom drain section 9 is connected to another drain section when the bathroom drain floor heating operation is not being performed.

[0048] (2) In the above embodiment, the changing room floor heating system is exemplified as one in which the operation control unit 4 is configured to start executing the changing room floor heating operation when the bathroom drain detection unit 18 detects that hot water has started to be discharged from the bathroom drain unit 9 after receiving a command to start the changing room floor heating operation. However, this is not limited to this, and for example, the system may be configured to start executing the changing room floor heating operation when the operation control unit 4 receives a command to start the changing room floor heating operation.

[0049] (3) In the above embodiment, the changing room floor heating system is configured to determine whether or not hot water is being discharged from the bathroom drain section 9 based on detection by the bathroom drain detection section 18 provided in the drain pipe 12. However, this is not limited to this, and the system may be configured, for example, to estimate whether or not hot water is being discharged from the bathroom drain section 9 due to the supply of hot water based on detection by a hot water supply detection section that detects the supply of hot water from the heat source unit 5 to the shower 8.

[0050] (4) In the above embodiment, the changing room floor heating system is configured to appropriately heat the hot water discharged from the bathroom drain section 9 in the drain heating section 20 so that the hot water temperature flowing through the changing room underfloor hot water flow section 3 becomes the set hot water temperature. However, this is not limited to this, and the system may be configured to omit heating of the discharged hot water by the drain heating section 20.

[0051] (5) The changing room floor heating system may be configured to use not only the hot water discharged from the bathroom drain 9 when using a shower 8 or the like in the bathroom 1, but also the hot water discharged from the bathtub in the bathroom 1 to the bathroom drain 9 for bathroom drain floor heating operation. [Explanation of symbols]

[0052] 1 bathroom 2 Changing room 3 Hot water flow section under the floor of the changing room 4 Operation control unit 5 Heat source machine 9 Bathroom drainage section 17 Hot water supply source switching unit 18 Bathroom drainage detector 20 Drainage heating section

Claims

1. a hot water circulation section under the floor of the dressing room provided under the floor of the dressing room adjacent to the bathroom; an operation control unit capable of supplying hot water to the underfloor hot water circulator in the dressing room to perform a dressing room floor heating operation for heating the floor of the dressing room; a hot water supply source switching unit that switches the source of hot water supplied to the underfloor hot water circulator in the dressing room between a heat source machine that generates hot water and a bathroom drainage unit that discharges hot water from the bathroom; a bathroom drain detection unit that detects the discharge of hot water from the bathroom drain unit, The operation control unit performs bathroom drainage floor heating operation, in which, while the bathroom drainage detection unit detects the discharge of hot water from the bathroom drainage unit, the hot water supply source switching unit sets the hot water supply source for the changing room underfloor hot water circulation unit to the bathroom drainage unit, and while the bathroom drainage detection unit does not detect the discharge of hot water from the bathroom drainage unit, the operation control unit performs heat source machine hot water floor heating operation, in which, while the bathroom drainage detection unit detects the discharge of hot water from the bathroom drainage unit, the hot water supply source switching unit sets the hot water supply source for the changing room underfloor hot water circulation unit to the heat source machine.This is a changing room floor heating system.

2. The changing room floor heating system of claim 1, wherein the operation control unit starts the changing room floor heating operation when the bathroom drain detection unit detects that hot water has started to be discharged from the bathroom drain unit after receiving a command to start the changing room floor heating operation.

3. The bathroom is equipped with a drainage heater capable of heating the hot water discharged from the bathroom drainage section, The floor heating system for a dressing room according to claim 1 or 2, wherein the operation control unit controls the operation of the drainage heating unit so that the temperature of the hot water flowing through the underfloor hot water flow unit of the dressing room becomes the set hot water temperature when the bathroom drainage floor heating operation is performed.

4. The changing room floor heating system of claim 1 or 2, wherein after the changing room floor heating operation is completed, the operation control unit sets the hot water supply source for the changing room underfloor hot water circulation section to the heat source unit using the hot water supply source switching unit, and performs a cleaning operation to supply hot water from the heat source unit to the changing room underfloor hot water circulation section to clean the changing room underfloor hot water circulation section.

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