JP5005739B2 - Mist sauna equipment - Google Patents

Description

  The present invention relates to a mist sauna apparatus in which hot water is sprayed in a bathroom to obtain a sauna effect.

  Conventionally, as this type of mist sauna device, a heat source machine, a mist nozzle, a mist water supply channel connected to the mist nozzle, a liquid heat exchanger with a secondary side interposed in the mist water supply channel, and a heat source device A mist heat medium circulation path that circulates the heated heat medium through the primary side of the liquid-to-liquid heat exchanger by the operation of a circulation pump provided in the heat source machine, and the water supplied to the mist nozzle is subjected to heat-to-liquid exchange It is known that the apparatus is heated by a heat medium that is circulated in the heat medium circulation path for mist and sprays hot water from a mist nozzle.

  In this, a water supply valve interposed in the mist water supply channel portion upstream of the liquid heat exchanger, a mist valve interposed in the mist water supply channel portion downstream of the liquid heat exchanger, A flow rate adjusting valve interposed in the heat medium circulation path for mist and a secondary side temperature sensor for detecting the water temperature on the secondary side of the liquid-liquid heat exchanger are provided. When a mist operation start command is issued, the heat medium is heated by the heat source unit and the circulation pump is operated, and the flow rate control valve is opened while the water supply valve and the mist valve are closed, and the liquid heat exchange is performed. Preheat operation is performed to circulate the heat medium to the primary side of the unit, and then the water supply valve and mist valve are opened to start the mist operation. Thereafter, the detected temperature of the secondary temperature sensor is a predetermined temperature corresponding to the room temperature. Thus, temperature control is performed to adjust the flow rate of the heat medium flowing to the primary side of the liquid heat exchanger with the flow rate adjustment valve.

  By the way, when the mist sauna apparatus is used for a long period of time, a leak between the primary side and the secondary side may occur due to internal corrosion of the liquid-liquid heat exchanger or the like. Then, the mist sauna apparatus which has a function which test | inspects the leak generation | occurrence | production of a liquid heat exchanger is also known (for example, refer patent document 1). In this device, a primary temperature sensor for detecting the temperature of the heat medium on the primary side of the liquid heat exchanger is provided, the mist valve and the water supply valve are closed, the mist operation is terminated, and the water supply valve is once opened. Leak inspection control for determining whether or not a leak has occurred is performed based on a change in temperature detected by the heat medium temperature sensor after the water supply valve is opened. Here, if a leak occurs, water flows from the secondary side to the primary side of the liquid heat exchanger when the water supply valve is opened, the temperature detected by the primary temperature sensor decreases, and there is a leak. It is determined.

  However, it has been found that such leak inspection control causes the following problems. That is, in the leak inspection control, since the water supply valve is once opened with the mist valve closed, when the water supply valve is closed when the leak inspection control is completed, the water supply valve is placed between the water supply valve and the mist valve. Water is contained while the water supply pressure is applied. Here, when the room temperature rises above the set temperature during the mist operation, the water temperature (mist temperature) on the secondary side of the liquid heat exchanger is lowered by temperature control, and when the mist operation ends, The water temperature on the secondary side of the heat exchanger may be relatively low. In this case, when the pre-heating operation is issued after the leak inspection control is completed and the pre-heating operation is performed, the water temperature on the secondary side of the liquid heat exchanger will be much higher than the water temperature at the end of the previous mist operation. The water pressure between the water supply valve and the mist valve may rise to a pressure that greatly exceeds the water supply pressure. In such a situation, the valve body of the mist valve is strongly pressed to the closed side by this water pressure, and when the preheating operation is completed, the mist valve cannot be opened, and hot water cannot be sprayed.

JP 2007-212096 A

  In view of the above points, an object of the present invention is to provide a mist sauna device that can prevent a mist valve from becoming unopenable.

  In order to solve the above-described problems, the present invention provides a heat source machine, a mist nozzle, a mist water supply channel connected to the mist nozzle, a liquid heat exchanger having a secondary side interposed in the mist water supply channel, and a heat source. A heat medium circulation path for mist that circulates the heat medium heated by the machine through the primary side of the liquid-liquid heat exchanger by the operation of the circulation pump provided in the heat source machine, and the water supplied to the mist nozzle is A mist sauna device that is heated by a heat medium that is circulated in a heat medium circulation path for mist in a heat exchanger and that performs mist operation in which hot water is sprayed from a mist nozzle, the mist on the upstream side of the liquid heat exchanger A water supply valve interposed in the irrigation water supply channel, a mist valve interposed in the mist water supply channel downstream of the liquid heat exchanger, and a flow control valve interposed in the mist heat medium circulation channel , The secondary side temperature to detect the water temperature of the secondary side of the liquid-liquid heat exchanger Sensor, a primary side temperature sensor for detecting the heat medium temperature on the primary side of the liquid-to-liquid heat exchanger, and a leak inspection means for inspecting the occurrence of a leak between the primary side and the secondary side of the liquid-to-liquid heat exchanger. The leak inspection means closes the mist valve and the water supply valve and terminates the mist operation, then opens the water supply valve once and changes the detected temperature of the primary temperature sensor after the water supply valve is opened. Is configured to perform leakage inspection control for determining whether or not leakage has occurred, and when a mist operation end command is issued, the detected temperature of the secondary temperature sensor is less than a predetermined reference temperature. In this case, the leak inspection control is prohibited, and the water supply valve is closed before the mist valve.

  According to the present invention, the leak inspection control is executed only when the water temperature on the secondary side of the liquid-to-liquid heat exchanger at the end of the mist operation is a relatively high temperature equal to or higher than the reference temperature. For this reason, when the mist operation start command is issued after the leak inspection control is completed and the preheating operation is performed, the water temperature on the secondary side of the liquid heat exchanger is higher than the water temperature at the end of the previous mist operation. Even if it rises, the temperature difference becomes slight. Therefore, during the preheating operation, the water pressure between the water supply valve and the mist valve does not increase to a pressure that greatly exceeds the water supply pressure, and it is possible to prevent the mist valve from becoming unopenable when the preheating operation is completed.

  Also, when the water temperature on the secondary side of the liquid heat exchanger at the end of the mist operation is lower than the reference temperature, the water supply valve is closed before the mist valve. The pressure of water confined between the valves is atmospheric pressure. Therefore, even if the water temperature on the secondary side of the liquid-liquid heat exchanger rises above the water temperature at the end of the previous mist operation when the mist operation start command is issued and the preheating operation is performed, the water supply valve The water pressure between the mist valve and the mist valve rises from the atmospheric pressure, and the mist valve does not become unopenable when the preheating operation is completed.

  By the way, when a mist sauna device is incorporated in a bathroom heater, the mist heat medium circulation path is generally a heating medium that supplies a heat medium from a heat source to a heating radiator provided in the bathroom heater. An inflow path branched from the forward path of the circulation path and connected to the primary side inlet of the liquid heat exchanger, and a return path of the heating medium circulation path for returning the heat medium from the radiator to the heat source unit It is comprised with the outflow path connected to the outlet of the primary side of a heat exchanger. A heating medium temperature sensor that detects the temperature of the heating medium supplied to the radiator is disposed in the forward path of the heating circulation path.

  In this case, if the heat medium temperature sensor is also used as the primary temperature sensor, the cost can be reduced. In this case, if the flow control valve is provided in the inflow path, even if water flows from the secondary side to the primary side of the liquid-liquid heat exchanger due to the occurrence of a leak, this water flows into the outflow path, There is a possibility that the temperature detected by the heat medium temperature sensor arranged in the forward path of the heating circulation path that is connected to is not lowered and it is erroneously determined that there is no leakage. On the other hand, if a leak check control is executed with a flow rate control valve provided in the outflow path and the flow rate control valve closed, the leak flows into the primary side from the secondary side of the liquid heat exchanger. It is possible to prevent water from flowing into the outflow path and prevent erroneous determination.

  Even if a mist operation end command is issued, the circulation pump is not stopped immediately, but is continuously operated for a while to prevent post-boiling. Therefore, when the mist operation end command is issued, and the detected temperature of the secondary temperature sensor is equal to or higher than the reference temperature, the time it takes for the circulation pump to stop after the mist operation end command is issued. It is desirable to execute leak inspection control after elapse of a predetermined waiting time set together. According to this, the leakage of water from the secondary side to the primary side of the liquid heat exchanger is not hindered by the water supply pressure by the circulation pump, and it is possible to accurately determine whether or not the leakage has occurred.

  In the embodiment to be described later, the processing from STEP 10 to STEP 22 in FIG. 2 corresponds to the leak inspection means.

Explanatory drawing which shows the whole structure of the mist sauna apparatus of embodiment of this invention. The flowchart which shows the content of the mist driving | operation control containing the leak test | inspection control performed with the mist sauna apparatus of embodiment.

  With reference to FIG. 1, 1 is a heat source machine, 2 is the bathroom heater incorporating the mist sauna apparatus. The heat source device 1 includes a heat exchanger 3 using a burner (not shown) as a heat source. The bathroom heater 2 is installed in the ceiling part BRa of the bathroom BR. The lower surface cover 4 of the bathroom heater 2 is provided with a suction port 5 and an outlet 6 with a variable louver 6a. In the bathroom heater 2, a ventilation path 7 connecting the suction port 5 and the outlet 6 is defined, and a radiator 8 and a circulation fan 9 are disposed in the ventilation path 7.

  The radiator 8 is connected to the heat exchanger 3 of the heat source unit 1 via the heating medium circulation path 10 for heating. The heating medium circulation path 10 for heating is a forward path 10 a for supplying a heat medium (water, antifreeze liquid, etc.) heated by the heat exchanger 3 to the radiator 8, and a heat medium that has passed through the radiator 8 to the heat exchanger 3. And a return path 10b. A cistern 11 and a circulation pump 12 provided in the return path 10b are provided in the heat source unit 1, and a thermal valve 13 provided in the forward path 10a is provided in the bathroom heater 2. Thus, when the circulation pump 12 is operated and the thermal valve 13 is opened, the heat medium heated by the heat exchanger 3 is circulated to the heating heat medium circuit 10 via the radiator 8. Then, the air in the bathroom BR sucked from the suction port 5 by the operation of the circulation fan 9 is heated by the radiator 8 and is blown into the bathroom BR from the blowout port 6 as hot air, thereby heating the bathroom BR. Is called.

  The bathroom heater 2 also includes a room temperature sensor 14 facing the suction port 5 and a heat medium that detects the temperature of the heat medium supplied to the radiator 8 disposed in the forward path 10a of the heating medium circulation path 10. And a temperature sensor 15. The heating medium circulation path 10 is provided with a bypass path 10c that branches from the forward path 10a to reach the systern 6.

  The bathroom heater 2 is further provided with a mist nozzle 16 constituting a mist sauna device, a mist water supply channel 17 connected to the mist nozzle 16, and a liquid heat exchanger 18. The secondary side 18 b of the liquid heat exchanger 18 is interposed in the water supply passage 17 for mist. Then, the heat medium is circulated to the primary side 18a of the liquid heat exchanger 18 via the mist heat medium circulation path 19 branched from the heating heat medium circulation path 10, and the water supplied to the mist nozzle 16 is liquefied. The heat exchanger 18 can be heated by a heat medium.

  The mist heat medium circulation path 19 is branched from the forward path 10a of the heating heat medium circulation path 10 and connected to the inlet of the primary side 18a of the liquid heat exchanger 18, and the heating heat medium circulation path And an outflow passage 19b branched from the ten return passages 10b and connected to the outlet of the primary side 18a of the liquid heat exchanger 18. The outflow path 19b is provided with a flow rate adjustment valve 20 that can adjust the flow rate of the heat medium and can block the flow of the heat medium.

  A water supply valve 21 and a check valve 22 are provided in the mist water supply path 17 on the upstream side of the liquid heat exchanger 18, and are positioned on the downstream side of the liquid heat exchanger 18. A mist valve 23 is interposed. Further, a mist temperature sensor 24 as a secondary side temperature sensor is provided in a portion of the mist water supply passage 17 between the liquid heat exchanger 18 and the mist valve 23, and the water temperature of the secondary side 18 b of the liquid heat exchanger 18 is provided. Can be detected by the mist temperature sensor 24.

  The detection signals of the room temperature sensor 14, the heat medium temperature sensor 15 and the mist temperature sensor 24 described above are input to the controller 25 for the bathroom heater 2, and the controller 25 causes the circulation fan 9, the thermal valve 13, the flow control valve 20, The water supply valve 21 and the mist valve 23 are controlled. Moreover, the controller 25 for the bathroom heater 2 is connected to the controller 26 for the heat source unit 1 so as to be communicable. Further, a remote controller (not shown) is communicably connected to the controller 25 for the bathroom heater 2, and when the mist switch provided in the remote controller is turned on, the mist operation control by the controller 25 is performed.

  Hereinafter, the mist operation control will be described with reference to FIG. In the mist operation control, first, an operation command is sent to the heat source unit 1 in STEP 1 and the thermal valve 13 is opened. The controller 26 for the heat source unit 1 receives the operation command from the controller 25 for the bathroom heater 2 and operates the circulation pump 12 and burns the burner for the heat exchanger 3. Thus, the heat medium heated by the heat source device 1 is circulated to the heating heat medium circulation path 10 via the radiator 8. Next, the process proceeds to STEP 2 and it is determined whether or not the detected temperature Tn of the heat medium temperature sensor 15 has become equal to or higher than a predetermined heatable temperature YT1 (for example, 40 ° C.) necessary for preventing the blowing of cold air. When Tn ≧ YT1, the circulation fan 9 is operated in STEP 3 to start heating the bathroom.

  Next, in STEP 4, the flow rate control valve 20 is fully opened, the heat medium is flowed to the primary side 18a of the liquid heat exchanger 18, and the preheating operation is started. Thereafter, in STEP 5, it is determined whether or not the detected temperature Tr of the room temperature sensor 14 has become equal to or higher than a predetermined lower limit temperature YT2 (for example, 27 ° C.) at which mist operation is possible. When Tr ≧ YT2, it is determined in STEP 6 whether or not the detected temperature Tm of the mist temperature sensor 24 is equal to or higher than a predetermined preheating completion temperature YT3 (for example, 40 ° C.). Then, when Tm ≧ YT3, the routine proceeds to STEP7, where the mist valve 23 and the water supply valve 21 are opened, and the mist operation for spraying warm water is started. Although not shown in the drawing, the process proceeds to STEP 7 not only when Tm ≧ YT3 but also when the detected temperature Tm of the mist temperature sensor 24 rises by more than a predetermined temperature (for example, 7 ° C.) from the initial detected temperature. Start mist operation.

  When the mist operation is started, the temperature control is performed in STEP8. In the temperature control, when the detected temperature Tr of the room temperature sensor 14 is higher than a set temperature set by the remote controller by a predetermined temperature (for example, 2 ° C.) or more, the detected temperature Tm of the mist temperature sensor 24 is set to a predetermined upper limit temperature (for example, 70 ° C.) to a lower limit temperature (for example, 35 ° C.), the flow rate of the heat medium flowing to the primary side 18a of the liquid heat exchanger 18 is decreased by the flow control valve 20, and a room temperature sensor When the detected temperature Tr of 14 is lower than the set temperature by a predetermined temperature (for example, 2 ° C.) or more, the primary side 18a of the liquid-to-liquid heat exchanger 18 so that the detected temperature Tm of the mist temperature sensor 24 increases stepwise. The flow rate of the heat medium flowing through the flow rate is increased by the flow rate control valve 20.

  Next, in STEP 9, it is determined whether or not a mist operation end command has been issued. The end command is issued when the mist switch is turned off or when a predetermined operation time set by the remote controller has elapsed since the start of the mist operation. Until the end command is issued, the process returns to STEP 8 to continue the temperature control.

  When a mist operation end command is issued, a stop command is sent to the heat source unit 1 in STEP 10 and the circulation fan 9 is stopped. The controller 26 for the heat source unit 1 receives the stop command from the controller 25 for the bathroom heater 2 and stops the combustion of the burner, and the circulation pump 12 is burnt in the burner to prevent the post-boiling of the heat exchanger 3. Even after stopping, it is stopped for a certain period of time.

  Next, proceeding to STEP 11, it is determined whether or not the detected temperature Tm of the mist temperature sensor 24 is equal to or higher than a predetermined reference temperature YT4 (for example, 60 ° C.). When Tm <YT4, the routine proceeds to STEP12 where the thermal valve 13, the flow rate control valve 20 and the water supply valve 21 are closed, and then the mist valve 23 is closed at STEP13, and the operation is terminated.

  When Tm ≧ YT4, after the mist valve 23, the water supply valve 21 and the flow rate control valve 20 are closed in STEP14, whether or not a predetermined waiting time has elapsed since the mist operation stop command was issued in STEP15. Determine. This waiting time is set to, for example, about 90 seconds in accordance with the time required for the circulation pump 12 to stop after the mist operation end command is issued. Then, when the waiting time has elapsed, the process proceeds to STEP 16 to determine whether or not the detected temperature Tn of the heat medium temperature sensor 15 is equal to or higher than a predetermined inspectable temperature YT5 (for example, 60 ° C.). If Tn <YT5, the thermal valve 13 is closed in STEP 17 and the operation is terminated.

  If Tn ≧ YT5, leak inspection control is executed. In the leak inspection control, first, in step 18, the water supply valve 21 is opened. If a leak occurs between the primary side 18 a and the secondary side 18 b of the liquid heat exchanger 18, the water that has passed through the valve 21 when the water supply valve 21 is opened becomes the second of the liquid heat exchanger 18. The water flows into the primary side 18a from the secondary side 18b, and this water reaches the arrangement part of the heat medium temperature sensor 15, and the detected temperature Tn of the heat medium temperature sensor 15 decreases. Therefore, after the water supply valve 21 is opened, it is determined whether or not a predetermined inspection time (for example, 180 seconds) has elapsed in STEP 19, and when the inspection time has elapsed, the process proceeds to STEP 20 and the water supply valve 21 is opened. It is determined whether or not the amount of decrease ΔTn of the detected temperature Tn of the heat medium temperature sensor 15 from the above is equal to or greater than a predetermined leak determination value YΔ (for example, 30 ° C.). If ΔTn ≧ YΔ, it is determined that a leak has occurred, and an abnormal display for notifying the occurrence of the leak is performed in STEP 21, and then the thermal valve 13 and the water supply valve 21 are closed in STEP 22, and the operation is terminated. If ΔTn <YΔ, it is determined that no leak has occurred, and the process proceeds to STEP 22 without displaying an abnormality.

  Thus, in the leak inspection control, since the water supply valve 21 is once opened with the mist valve 23 closed, when the water supply valve 21 is closed upon completion of the leak inspection control, the water supply valve 21 and the mist valve 23 During this period, the water is contained while the water supply pressure is applied. Here, when the room temperature rises above the set temperature during the mist operation, the water temperature of the secondary side 18b of the liquid-to-liquid heat exchanger 18 is lowered by temperature control (the possibility of being lowered to 35 ° C). In some cases, at the end of the mist operation, the water temperature of the secondary side 18b of the liquid heat exchanger 18 may be relatively low. If the leak inspection control is performed in such a state, when the mist operation start command is subsequently issued and the preheating operation is performed, the water temperature of the secondary side 18b of the liquid heat exchanger 18 is changed to the previous mist operation. The water temperature rises to much higher than the water temperature at the end (the water temperature may rise to 70 ° C. while Tr <YT1), and the water pressure between the water supply valve 21 and the mist valve 23 greatly exceeds the water supply pressure. May rise to pressure. In such a situation, the valve body of the mist valve 23 is strongly pressed to the closed side by this water pressure, and even if the solenoid of the mist valve 23 is energized and opened when the preheating operation is completed, the mist valve 23 is opened. It becomes impossible to spray hot water.

  On the other hand, in the present embodiment, the leak inspection control is executed when the detected temperature Tm of the mist temperature sensor 24 at the end of the mist operation (the water temperature of the secondary side 18b of the liquid heat exchanger 18) is the reference temperature. This is only in the case of a relatively high temperature of YT4 or higher. When Tm <YT4, leak inspection control is prohibited. For this reason, when the pre-heating operation is performed after the leak inspection control is completed and the preheating operation is performed, the water temperature of the secondary side 18b of the liquid heat exchanger 18 is the water temperature at the end of the previous mist operation. Even if it rises above, the temperature difference becomes small. Therefore, during the preheating operation, the water pressure between the water supply valve 21 and the mist valve 23 does not rise to a pressure that greatly exceeds the water supply pressure, and the mist valve 23 is prevented from being unable to open when the preheating operation is completed. it can. In consideration of the possibility that the water temperature of the secondary side 18b of the liquid heat exchanger 18 may rise to 70 ° C. while Tr <YT1 during the preheating operation, the reference temperature YT4 is a relatively high temperature of about 60 ° C. Set to

  In addition, when the water temperature on the secondary side 18b of the liquid heat exchanger 18 at the end of the mist operation is lower than the reference temperature YT4, the water supply valve 21 is closed in STEP 12, and then the mist valve 23 is closed in STEP 13. The pressure of water that is contained between the water supply valve 21 and the mist valve 23 when the mist valve 23 is closed is atmospheric pressure. Therefore, even when the preheating operation is performed after the mist operation start command is issued, the water supply temperature is increased even if the water temperature on the secondary side 18b of the liquid heat exchanger 18 rises above the water temperature at the end of the previous mist operation. The water pressure between the valve 21 and the mist valve 23 will rise from the atmospheric pressure, and the mist valve 23 will not become unopenable when the preheating operation is completed.

  In the present embodiment, the heat medium temperature sensor 15 disposed in the forward path 10a of the heating medium circulation path 10 is used as a secondary side temperature sensor that detects the heat medium temperature of the primary side 18a of the liquid heat exchanger 18. Since it is also used, the cost can be reduced. In this case, if the flow control valve 20 is provided in the inflow passage 19a of the mist heat medium circulation passage 19, water flows from the secondary side 18b of the liquid heat exchanger 18 to the primary side 18a due to the occurrence of a leak. However, this water flows to the outflow path 19b of the mist heat medium circulation path 19, and the detected temperature Tn of the heat medium temperature sensor 15 disposed in the forward path 10a of the heating circulation path 10 connected to the inflow path 19a does not decrease. There is a possibility that it is erroneously determined that there is no leak. On the other hand, in this embodiment, since the flow rate control valve 20 is interposed in the outflow passage 19b and the leak inspection control is executed in a state where the flow rate control valve 20 is closed, the liquid heat exchanger is caused by the leak. Accordingly, it is possible to prevent water flowing into the primary side 18a from the secondary side 18b of the 18 from flowing into the outflow path 19b, thereby preventing erroneous determination.

  Furthermore, in the present embodiment, the leak inspection control is executed after a predetermined waiting time set in accordance with the time required for the circulation pump 12 to stop after the mist operation end command is issued. Therefore, the leakage of water from the secondary side 18b of the liquid heat exchanger 18 to the primary side 18a is not hindered by the water supply pressure by the circulation pump 12, and the presence or absence of leakage can be accurately determined.

  Further, if leak inspection control is performed in a state where the detection temperature Tn of the heat medium temperature sensor 15 is relatively low, the amount of decrease in the detection temperature Tn is small even if a leak occurs, and it may be erroneously determined that no leak has occurred. There is. Therefore, in the present embodiment, when the detected temperature Tn of the heat medium temperature sensor 15 is lower than the inspectable temperature YT5, the leak inspection control is prohibited and erroneous determination is prevented.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above-described embodiment, the heat medium temperature sensor 15 is also used as the secondary side temperature sensor, but the secondary side temperature is separated from the heat medium temperature sensor 15 inside the liquid heat exchanger 18 and the outflow path 19b. A sensor may be arranged. In this case, the leak check control can be executed without waiting for the circulation pump 12 to stop by providing the flow rate adjusting valve 20 in the inflow passage 19a and closing the flow rate control valve 20 in the leak check control. . Moreover, although the said embodiment applies this invention to the mist sauna apparatus integrated in a bathroom heater, this invention is applicable similarly to the mist sauna apparatus provided separately from a bathroom heater.

  DESCRIPTION OF SYMBOLS 1 ... Heat source machine, 2 ... Bathroom heater, 8 ... Radiator, 10 ... Heating medium circulation path for heating, 10a ... Outward path, 10b ... Return path, 12 ... Circulation pump, 15 ... Heat medium temperature sensor (secondary side temperature sensor) ), 16 ... Mist nozzle, 17 ... Mist water supply path, 18 ... Liquid heat exchanger, 18a ... Primary side, 18b ... Secondary side, 19 ... Mist heat medium circulation path, 19a ... Inlet path, 19b ... Outflow 20: Flow control valve, 21: Water supply valve, 23: Mist valve, 24: Mist temperature sensor (primary side temperature sensor), 25: Controller for bathroom heater.

Claims (3)

A heat source device, a mist nozzle, a mist water supply channel connected to the mist nozzle, a liquid heat exchanger having a secondary side in the mist water supply channel, and a heat medium heated by the heat source device are provided in the heat source device. A mist heat medium circulation path that circulates through the primary side of the liquid heat exchanger by the operation of the circulating pump, and circulates water supplied to the mist nozzle to the mist heat medium circulation path in the liquid heat exchanger A mist sauna device that is heated by a heating medium that causes the mist operation to spray hot water from a mist nozzle,
A water supply valve interposed in the mist water supply channel portion upstream of the liquid heat exchanger, a mist valve interposed in the mist water supply channel portion downstream of the liquid heat exchanger, and a mist heat medium A flow rate adjustment valve interposed in the circulation path, a secondary temperature sensor for detecting the water temperature on the secondary side of the liquid heat exchanger, and a primary side temperature for detecting the heat medium temperature on the primary side of the liquid heat exchanger A sensor, and a leak inspection means for inspecting the occurrence of a leak between the primary side and the secondary side of the liquid heat exchanger,
The leak inspection means closes the mist valve and the water supply valve and terminates the mist operation, then opens the water supply valve once and based on the change in temperature detected by the primary temperature sensor after the water supply valve is opened. Are configured to perform leak inspection control to determine whether or not a leak has occurred,
When the mist operation end command is issued, if the temperature detected by the secondary temperature sensor is lower than the specified reference temperature, the leak inspection control is prohibited and the water supply valve is closed before the mist valve. A mist sauna device. The mist sauna device according to claim 1 incorporated in a bathroom heater, wherein the heat medium circulation path for mist supplies a heat medium from the heat source device to a heating radiator provided in the bathroom heater. Branched from the forward path of the heating medium circulation path and branched from the inflow path connected to the primary inlet of the liquid heat exchanger, and from the return path of the heating medium circulation path for returning the heating medium from the radiator to the heat source unit And a heat medium temperature sensor that detects the temperature of the heat medium supplied to the radiator is arranged in the forward path of the heating circulation path. In what
A mist sauna characterized in that a heat medium temperature sensor is also used as the primary side temperature sensor, the flow rate control valve is interposed in an outflow passage, and the leak inspection control is executed with the flow rate control valve closed. apparatus.   If the temperature detected by the secondary temperature sensor is equal to or higher than the reference temperature when the mist operation end command is issued, the time it takes for the circulation pump to stop after the mist operation end command is issued 3. The mist sauna apparatus according to claim 2, wherein the leak inspection control is executed after a predetermined waiting time set according to the time elapses.

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