JP4612363B2 - Mist sauna equipment - Google Patents

Description

  The present invention relates to a mist sauna apparatus capable of spraying hot water in a mist form in a bathroom to make a mist sauna bath.

  In recent years, in a bathroom heater / dryer that is installed on the ceiling of a bathroom, etc. to heat the bathroom, dry the bathroom, ventilate the bathroom, or blow the bathroom, it is possible to make a mist sauna bath by spraying hot water into the mist. A bathroom heater / dryer with a mist sauna function (see, for example, Patent Document 1) is provided.

In such a bathroom heater / dryer with a mist sauna function, a hot water circulation pipe connected to the heat source machine for circulating hot water supplied from the heat source machine and hot air for generating hot air arranged in the hot water circulation pipe Mist heating pipe provided in a hot water circulation pipe, a mist nozzle for spraying hot water for a mist sauna in the bathroom in a mist form, and water supply for mist supplying clean water to the mist nozzle A mist heating pipe for heating the water flowing through the mist water supply line with hot water flowing through the mist heating pipe, And a mist heat exchanger provided between the mist water supply pipe. When the heat source is operated and hot water is circulated through the hot water circulation line, the water supply on / off valve is opened and water is supplied to the mist water supply line. The water flowing through the pipe is heated, and hot water is sprayed in a mist form from a mist nozzle so that a mist sauna bath can be made.
JP 2003-334230 A

The mist heat exchanger is a liquid-liquid heat exchanger, and a plate heat exchanger is often used as the liquid-liquid heat exchanger. However, in the plate heat exchanger, the primary side (warm water circulation pipeline side) and the secondary side (mist water supply pipeline side) are only divided by the plate, and there is no cracking, corrosion, or poor brazing of the plate. When this occurs, there is a leak between the primary side and the secondary side, causing the following problems.
(1) When the tap water pressure for supplying water to the water supply pipe for mist is high, tap water flows into the hot water circulation pipe and overflows from the heat source machine side. That is, it becomes the overflow state of the makeup water of the heat source machine.
(2) When the tap water pressure for supplying water to the mist water supply line is low, the circulating water flowing through the hot water circulation line may flow into the secondary side, and there is a risk that unclean water will be sprayed as mist, especially antifreeze. Has a problem that the antifreeze is sprayed as mist.

  The present invention has been invented in view of the above-described conventional problems, and can detect a leak between a primary side and a secondary side in a heat exchanger for mist, It is an object of the present invention to provide a mist sauna device capable of quickly stopping leakage of water supply to the heat source machine side or preventing the circulating water in the hot water circulation pipe from being sprayed as mist.

In order to solve the above-described problems, the mist sauna apparatus of the present invention is connected to the heat source unit 1 and the hot water circulation pipe 2 through which the hot water supplied from the heat source unit 1 circulates, and hot water for the mist sauna in the bathroom 3. A mist nozzle 4 for spraying in the form of a mist, a mist water supply line 5 for supplying clean water to the mist nozzle 4, mist opening / closing valves 21a, 21b provided in front of the mist nozzle 4 in the mist water supply line 5, A water supply on / off valve 6 disposed in the mist water supply line 5 for opening and closing the water supply, and a hot water circulation line 2 and mist for heating water flowing in the mist water supply line 5 with hot water flowing in the hot water circulation line 2 A mist heat exchanger 7 provided between the water supply pipe 5 and the hot water flow from the heat source unit 1 to the hot water circulation pipe 2 with the water supply opening / closing valve 6 closed prior to the mist sauna operation. Perform hot water circulation operation, water supply line for mist 5 Mist heat exchanger 7 and the mist-off valve 21a, mist heat exchanger by have line monitoring of the temperature of the water, the temperature rise of the water mist water supply pipe 5 is found greater than a predetermined value between the 21b when the hot water circulation pipe 2 in vessel 7 has detected a leak flowing out to the mist water supply pipe 5, characterized by comprising a safety device to stop the operation. With this configuration, even if there is a leak between the primary side (hot water circulation pipeline 2 side) and the secondary side (mist water supply pipeline 5 side) of the heat exchanger 7 for mist, the leak is detected. Thus, the operation can be stopped, and even when a leak occurs, the leak to the heat source unit 1 side can be stopped quickly, or the circulating water in the hot water circulation pipe 2 can be prevented from being sprayed as mist. In this case, a leak from the primary side to the secondary side can be easily detected (if hot water having a high temperature leaks from the hot water circulation pipe 2 to the mist feed pipe 5, the temperature of the water in the mist feed pipe 5 suddenly increases. By stopping the operation upon detection of this leak, it is possible to prevent the adverse effect that the circulating water in the hot water circulation pipe 2 is sprayed as mist.

Also provided drainage on-off valve 26 to the mist drainage pipe 25 with branches a mist drainage pipe 25 from the mist water supply pipe 5 on the downstream side of the mist heat exchanger 7, water supply on-off valve 6 and the mist-off With the valves 21a and 21b closed and the drain opening / closing valve 26 opened, the hot water circulation operation is performed prior to the mist sauna operation, and the temperature of the hot water in the hot water circulation line 2 rises to a predetermined temperature, and then the mist water supply pipe mist heat exchanger 7 and the mist-off valve 21a of the road 5, to monitor the temperature of the water between the 21b, mist by the temperature increase of the water mist water supply conduit 5 was observed more than a predetermined value A leak that flows out from the hot water circulation pipe 2 in the heat exchanger 7 into the water supply pipe 5 for mist is detected. Also in this case, the leak from the primary side to the secondary side can be easily detected, and the adverse effect that the circulating water in the hot water circulation pipe 2 is sprayed as mist can be prevented by stopping the operation by detecting the leak. . In this case, since the drain on / off valve 26 is opened and the mist on / off valves 21a and 21b are closed, even if there is a leak, the drain is not drained from the mist drain pipe 25 and sprayed from the mist nozzle 4. Therefore, it is possible to prevent the harmful effect of the circulating water in the hot water circulation pipe 2 being sprayed.

Connected to the heat source device 1, a hot water circulation pipe 2 through which hot water supplied from the heat source device 1 circulates, a mist nozzle 4 for spraying hot water for mist sauna in the bathroom 3, and a mist nozzle 4 Mist water supply line 5 for supplying water, mist opening / closing valves 21a and 21b provided in front of the mist nozzle 4 of the mist water supply line 5, and water supply disposed in the mist water supply line 5 for opening and closing the water supply Mist heat exchange provided between the hot water circulation line 2 and the mist water supply line 5 for heating the water flowing in the mist water supply line 5 with the on-off valve 6 and the hot water flowing in the hot water circulation line 2 A hot water circulation operation in which hot water is passed from the heat source device 1 to the hot water circulation line 2 and the temperature of the hot water in the hot water circulation line 2 rises to a predetermined temperature or higher, and the water supply opening / closing valve 6 is opened. When mist sauna operation is performed, for mist within a predetermined time Mist heat exchanger 7 and the mist-off valve 21a of the water lines 5, by the temperature of the water between the 21b does not become a temperature equal to or higher than the predetermined value, the mist water supply conduit 5 in the mist heat exchanger 7 It is characterized by a safety device that detects a leak that flows out to the hot water circulation pipe 2 and stops the operation when the leak is detected . In this case, a leak from the secondary side to the primary side can be easily detected (if water having a low temperature leaks from the water supply pipe 5 for mist to the hot water circulation pipe 2, the temperature of the hot water in the hot water circulation pipe 2 is detected. The temperature of the water in the mist water supply pipe 5 does not rise, and the operation is stopped by detecting this leak, so that the water flows from the mist water supply pipe 5 into the hot water circulation pipe 2 and the heat source machine 1 Can be prevented from overflowing.

  Since the present invention is configured as described, even if there is a leak between the primary side and the secondary side of the heat exchanger for mist, the leak can be detected and the operation can be stopped. There is an effect that the leak to the machine side can be stopped quickly and the circulating water in the hot water circulation pipe can be prevented from being sprayed as mist.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. In the example of the present embodiment, an example in which the mist sauna apparatus of the present invention is used in a bathroom heating dryer with a mist sauna (hereinafter simply referred to as a bathroom heating dryer) A will be described. The bathroom heater / dryer A shown in FIG. 1 and FIG. 2 heats the bathroom 3, ventilates the bathroom 3, dries the laundry dried in the bathroom 3, and blows air into the bathroom 3. In addition to the function of performing a mist sauna bath, the bathroom 3 has a function of spraying hot water in a mist state to perform a mist sauna bath. This bathroom heating / drying machine A is mainly composed of a bathroom heating / drying machine main body 10 and a grill plate 11 attached to the lower surface of the bathroom heating / drying machine main body 10. The bathroom heating / drying machine main body 10 is arranged behind the ceiling, is suspended and supported on a ceiling slab by a hanging metal fitting 12 or the like, and the lower surface of the bathroom heating / drying machine main body 10 faces the opening of the ceiling plate 13. . A grill plate 11 is disposed so as to cover the opening from below the ceiling plate 13, and the grill plate 11 is attached to the lower surface side of the bathroom heating / drying machine main body 10. By doing in this way, the grill board 11 is attached so that the peripheral edge of the opening of the ceiling board 13 may be pinched | interposed between the lower surface of the peripheral edge of the bathroom heating dryer main body 10, and the peripheral edge of the grill board 11.

  A hot air heat exchanger 14 and a blower 15 are provided inside the bathroom heater / dryer body 10. This hot air heat exchanger 14 exchanges heat with air flowing outside by passing hot water through the inside. The hot air heat exchanger 14 is arranged in the middle of the hot water circulation pipe 2 piped to the bathroom heater / dryer main body 10, and the hot water circulation pipe 2 is supplied with hot water from the heat source machine 1 such as a hot water heater. Is supplied so that hot water circulates. A heating on / off valve 27 such as a thermal valve that opens and closes the supply of hot water to the hot air heat exchanger 14 is provided in the middle of the hot water circulation pipe 2, and in the middle of the hot water circulation pipe 2. Is provided with a heating hot water thermistor TH2 for detecting the temperature of the hot water flowing through this pipe line. The blower 15 includes a circulation fan 15a and a ventilation fan 15b. A movable louver 17 that opens and closes the air outlet 16 is rotatably mounted at a position corresponding to the air outlet 16 of the bathroom heater / dryer body 10. The grill plate 11 is provided with a suction port 18 for sucking air in the bathroom 3, and a bathroom temperature thermistor TH 3 for detecting the temperature in the bathroom 3 is arranged in the vicinity of the suction port 18. The bathroom heater / dryer A can be operated by an operating device 19 provided on the wall surface of the bathroom 3.

  When the heating operation for heating the inside of the bathroom 3 is performed, the heating on-off valve 27 is opened to supply hot water to the hot air heat exchanger 14, the ventilation fan 15b is stopped, and the circulation fan 15a is driven. Then, the movable louver 17 is opened and the air outlet 16 is opened. Then, the air in the bathroom 3 is sucked into the bathroom heating / drying machine main body 10 from the suction port 18, and hot air heated by exchanging heat with warm water in the hot air heat exchanger 14 is blown out from the air outlet 16. As the air circulates, the inside of the bathroom 3 is heated.

  When the ventilation operation is performed to ventilate the bathroom 3, the heating on-off valve 27 is closed to stop the supply of hot water to the hot air heat exchanger 14, the circulation fan 15a is stopped, and the ventilation fan 15b is driven. Then, the movable louver 17 is closed and the outlet 16 is closed. Then, the air in the bathroom 3 is sucked into the bathroom heating / drying machine main body 10 from the suction port 18 and is exhausted to the outside through the exhaust duct 30, thereby ventilating the bathroom 3.

  When performing a drying operation such as drying the inside of the bathroom 3 or drying the laundry dried in the bathroom 3, the heating on-off valve 27 is opened to supply hot water to the hot air heat exchanger 14 for circulation. The fan 15a and the ventilation fan 15b are driven, the movable louver 17 is opened, and the air outlet 16 is opened. Then, the air in the bathroom 3 is sucked into the bathroom heating / drying machine main body 10 from the suction port 18, and the hot air heated by exchanging heat with warm water in the hot air heat exchanger 14 is blown out from the blowout port 16. On the other hand, a part of the air sucked into the bathroom heating / drying machine main body 10 is exhausted to the outside through the exhaust duct 30. Thereby, the humidity in the bathroom 3 is lowered, and the drying in the bathroom 3 and the laundry dried in the bathroom 3 are performed.

  When blowing cool air into the bathroom 3, the heating on-off valve 27 is closed to stop the supply of hot water to the hot air heat exchanger 14, the ventilation fan 15b is stopped, and the circulation fan 15a is turned off. Driven, the movable louver 17 is opened and the outlet 16 is opened. Then, the air in the bathroom 3 is sucked into the bathroom heating / drying machine main body 10 from the suction port 18, the air circulates so that the air is blown out from the blowout port 16, and cool air is blown into the bathroom 3. .

  Moreover, in this invention, in order to give such a bathroom heating dryer A the function of a mist sauna, the mist sauna part 20 is incorporated. The mist nozzle 4 of the mist sauna unit 20 is arranged in the grill plate 11, and the mist water supply pipe 5 is communicated with the mist nozzle 4. In the case of this example, the mist nozzle 4 includes two mist nozzles 4a and 4b, and each mist nozzle 4a and 4b sprays hot water mist at a flow rate of, for example, about 0.5 liter / min. Mist opening / closing valves 21a and 21b such as electromagnetic valves are provided in front of the mist nozzles 4a and 4b, and mist is selectively sprayed from the mist nozzle 4a and the mist nozzle 4b by opening and closing the mist opening and closing valves 21a and 21b. It has become so. When the mist of hot water is sprayed from the two mist nozzles 4a and 4b, it can be operated with a strong mist sauna, and when the mist of hot water is sprayed from one mist nozzle 4a or the mist nozzle 4b, it can be operated with a weak mist sauna. In the case of this example, the mist sauna unit 20 is mounted on the bathroom heater / dryer body 10.

The mist water supply pipe 5 is supplied with tap water such as tap water, and is provided with a strainer 22 and a water supply opening / closing valve 6 such as an electromagnetic valve on the inlet side. The hot water circulation pipe 2 is provided with a mist heating pipe 23 in parallel with the hot air heat exchanger 14, and the mist heating pipe 23 is provided in the middle of the mist heating pipe 23. A proportional valve 24 for controlling the flow of the flowing hot water is provided. A mist heat exchanger 7, which is a liquid-liquid heat exchanger such as a plate heat exchanger, is disposed between the mist heating pipe 23 and the mist feed pipe 5 of the hot water circulation pipe 2. The water for mist flowing through the water supply pipe for mist 5 is heated by the hot water flowing through the pipe for mist heating 23. The plate heat exchanger as the mist heat exchanger 7 has a flow path for heat exchange by, for example, incorporating a plurality of corrugated heat transfer plates 7a as shown in FIG. A mist drain pipe 25 is branched from the mist feed pipe 5 between the mist heat exchanger 7 and the mist open / close valves 21a, 21b, and water in the mist feed pipe 5 is drained from the mist drain pipe. It can be discharged from the road 25 into the bathroom 3 and out of the bathroom 3. The mist drain line 25 is provided with a vacuum breaker 28 that generates a negative pressure and prevents the drainage from flowing backward by a drainage on-off valve 26 such as an electromagnetic valve. Further, a mist temperature thermistor TH1 for detecting the temperature of hot water flowing through the mist water supply pipe 5 is disposed between the mist heat exchanger 7 and the mist open / close valves 21a and 21b.

When the mist sauna bath is used, the water supply opening / closing valve 6 is opened to supply water to the mist supply pipe 5 and the proportional valve 24 is opened to circulate hot water through the mist heating pipe 23. As a result, the water flowing through the mist feed pipe 5 is heated by the mist heat exchanger 7, and the hot water flows through the mist feed pipe 5. When the mist open / close valves 21a and 21b are opened in this state, hot water mist is selectively sprayed from the mist nozzles 4a and 4b to perform a mist sauna bath. At this time, if mist is sprayed from both mist nozzles 4a and 4b, the mist sauna can be operated with a strong mist sauna bath, and if mist is sprayed from one mist nozzle 4a or mist nozzle 4b, the mist sauna is weak. You can drive and have a soft mist sauna bath. When the mist sauna bath is performed in this manner, the bathroom heater / dryer A is heated as described above to raise the temperature in the bathroom 3 so that the mist sauna bath can be comfortably performed.

  FIG. 5 shows a control circuit of the bathroom heater / dryer A, which is controlled by the control unit 29 by the operation of the operation unit 19 and operates as described above.

  Incidentally, a mist heat exchanger 7 is provided between the mist heating line 23 and the mist water supply line 5 in the hot water circulation line 2 in order to perform the mist sauna. In the present invention, heat exchange for mist is performed. A function of detecting a leak between the primary side and the secondary side of the vessel 7 is provided, and the operation is terminated when a leak is detected. The leak inspection of the heat exchanger 7 for mist is performed by the following leak inspection sequence. The inspection is performed by the leak inspection sequence after a predetermined time has elapsed after the drying, heating, and mist sauna operation of the bathroom heating dryer A ( For example, the operation is performed only when the mist sauna is operated after 12 hours.

A sequence (1) as an example of the leak inspection sequence will be described. However, the following X is the temperature of the water in the hot water circulation line 2 immediately before the start of the inspection, and Y is the temperature of the water in the water supply line 5 for mist immediately before the start of the inspection. The heat source apparatus 1 is turned on by a mist sauna operation start command (remote control operation by the operation device 19), and the heating on / off valve 27 and the proportional valve 24 are opened to perform the heating operation. Then, the temperature of the hot water circulating in the hot water circulation pipe 2 is monitored by the heating hot water thermistor TH2, and the temperature of the hot water in the hot water circulation pipe 2 has risen to a predetermined temperature (for example, X + 15 ° C.) as a starting point. The temperature of the water in the mist water supply line 5 is monitored at TH1, and by any chance, the temperature rise of the water in the mist water supply line 5 exceeds a predetermined value (for example, Y + 15 ° C.) within a predetermined time (for example, 30 seconds). If it is recognized, it is determined that there is a leak, an abnormality is notified, and the operation is terminated. That is, at the start of the leak inspection sequence, the water supply opening / closing valve 6 is closed, but the drain opening / closing valve 26 or the mist opening / closing valves 21a, 21b are opened (in this example, only the drain opening / closing valve 26 is opened). Therefore, if there is a leak between the primary side and the secondary side of the heat exchanger 7 for mist, the circulating water in the hot water circulation line 2 flows into the water supply line 5 for mist and the water in the water supply line 5 for mist Becomes a predetermined value (for example, Y + 15 ° C.) or more. Therefore, it is possible to determine whether or not there is a leak depending on whether or not the temperature of the water in the mist water supply pipeline 5 is equal to or higher than a predetermined value. As a specific example, when the temperature of the heating hot water thermistor TH2 reaches X + 15 ° C. (eg, 30 ° C. → 45 ° C.), the temperature of the mist temperature thermistor TH1 becomes Y + 15 ° C. (eg, 30 ° C. → 45 ° C.) within 30 seconds. ), It is determined that there is a leak in the heat exchanger 7 for mist. The upper limit of X + 15 ° C. is 60 ° C., the lower limit is 50 ° C., the upper limit of Y + 15 ° C. is 75 ° C., and the lower limit is 40 ° C. In the case of this example, the drain opening / closing valve 26 is open at the start of the leak inspection sequence. However, depending on the device, the mist drain conduit 25 may not be provided. In this case, the mist opening / closing valves 21a, 21b are opened. Yes.

Next, the sequence (1) will be described more specifically with reference to time charts shown in FIGS. FIG. 6 shows a normal operation start sequence when there is no leak in the mist heat exchanger 7. When the operation is stopped, the heating on-off valve 27 is closed, the circulation fan 15a is off, the proportional valve 24 is fully closed, the water supply on-off valve 6 is closed, the mist on-off valves 21a and 21b are closed, and the drain on-off valve 26 Is closed, but when a leak inspection sequence is initiated by a mist sauna operation start command, the heat source unit 1 is turned on, the heating on-off valve 27 is opened, the circulation fan 15a is on, the proportional valve 24 is fully opened, and the drain on-off valve 26 Becomes open (the water supply on / off valve 6 and the mist on / off valves 21a and 21b remain closed), and the hot water circulates in the hot water circulation conduit 2. It is determined whether the temperature monitored by the mist temperature thermistor TH1 has reached the predetermined temperature (Y + 15 ° C.) 30 seconds after the time when the temperature monitored by the heating hot water thermistor TH2 enters the predetermined temperature (X + 15 ° C.) after entering the leak inspection sequence. . In the case of FIG. 6, since the mist temperature thermistor TH1 does not detect a predetermined temperature (Y + 15 ° C.) or higher, it is determined that there is no leak, and the initial drainage sequence is started. The water that has been supplied and stays in the mist feed pipe 5 is drained from the mist drain pipe 25, and the mist feed pipe 5 is replaced with new water. When 30 seconds have elapsed from the start of the initial drainage sequence, the mist spraying sequence is started, the mist on / off valves 21a and 21b are opened, and then the drain on / off valve 26 is closed. When the mist open / close valves 21a and 21b are opened, mist of hot water is sprayed from the mist nozzles 4a and 4b. At this time, the temperature of the mist is controlled by opening / closing the proportional valve 24.

FIG. 7 shows an operation start sequence when there is a leak in the mist heat exchanger 7. As described above, when the leak inspection sequence is started by the mist sauna operation start command, the heat source unit 1 is turned on, the heating on / off valve 27 is opened, the circulation fan 15a is on, the proportional valve 24 is fully opened, and the drain on / off valve 26 is opened. The temperature monitored by the mist temperature thermistor TH1 30 seconds after the temperature monitored by the heating hot water thermistor TH2 reaches the predetermined temperature (X + 15 ° C.) after the hot water circulates in the hot water circulation pipe 2 and enters the leak inspection sequence. Is determined to be a predetermined temperature (Y + 15 ° C.). For Figure 7, the mist temperature thermistor TH1 detects a predetermined temperature (Y + 15 ℃) temperatures above is determined that there is leakage, abnormal heating on-off valve 27 is closed while being informed, the circulation fans 15a is turned off The proportional valve 24 is fully closed and the drain on / off valve 26 is closed to stop the operation.

As described above, leakage between the primary side and the secondary side of the mist heat exchanger 7 can be detected. However, when the leakage on the primary side and the secondary side is very small, the sequence (1) may not be able to detect the leakage. .
Even if the leak is very small, when the water supply pressure to the mist water supply line 5 is high, there is a large amount of water supply from the secondary side to the primary side in the mist heat exchanger 7 and the overflow tank of the heat source unit 1 A large amount of water is drained from.

  In order to prevent this, a leak is detected in the next sequence (2). When the water supply on / off valve 6 is opened after the mist sauna operation is started and the hot water is circulated through the hot water circulation pipe 2, the mist temperature thermistor TH1 is monitored within a predetermined time after the water supply on / off valve 6 is opened. If the temperature of the water in the mist water supply pipeline 5 does not reach the predetermined temperature, it is determined that the water leaks from the secondary side to the primary side, and the leak can be detected. That is, since a large amount of water flows into the heat source unit 1 by supplying water to the mist water supply line 5, the temperature of the water circulating in the hot water circulation line 2 is lowered even when the heat source unit 1 is operated at maximum. As a result, the temperature of the water in the mist feed pipe 5 detected by the mist temperature thermistor TH1 does not rise to a predetermined temperature. In this case, the temperature of the hot water in the hot water circulation pipe line 2 detected by the heating hot water thermistor TH2 is also detected as a low temperature by opening the water supply opening / closing valve 6. Even when a leak in the heat exchanger 7 for mist is detected in this manner, an abnormal alarm is notified and the operation is stopped.

It is a pipe line figure explaining piping inside a bathroom heating dryer of an example of an embodiment of the invention. It is sectional drawing of a bathroom heating dryer same as the above. It is a partially notched perspective view of the state which installed the bathroom heating dryer same as the above in the bathroom. It is sectional drawing explaining the internal structure of a plate type heat exchanger same as the above. It is a block diagram of the control circuit of a bathroom heating dryer same as the above. It is a time chart of a driving | operation start sequence same as the above, and shows the normal state without a leak. It is a time chart of a driving | operation start sequence same as the above, and shows the abnormal state with a leak.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat source machine 2 Hot water circulation line 3 Bathroom 4 Mist nozzle 5 Water supply line for mist 6 Water supply on-off valve 7 Heat exchanger 21a, 21b Mist on-off valve 25 Mist drain pipe 26 Drain on-off valve

Claims (3)

Connected to a heat source machine, a hot water circulation pipe through which hot water supplied from the heat source machine circulates, a mist nozzle that sprays hot water for mist sauna in the bathroom in a mist form, and for mist that supplies clean water to the mist nozzle Mist with hot water flowing through the hot water circulation pipe, a mist opening / closing valve provided in front of the mist nozzle of the water supply pipe for mist, a water supply opening / closing valve arranged in the water supply pipe for mist to open and close water supply A mist heat exchanger provided between the hot water circulation line and the mist water supply line to heat the water flowing through the water supply line, and the water supply on / off valve was closed prior to the mist sauna operation performed hot water circulation operation to flow the hot water from the heat source unit to the hot water circulation pipe in the state, it has rows monitoring of temperature of the water between the mist water supply pipe mist heat exchanger and mist off valve, water mist The temperature rise of the water in the pipeline is less than a predetermined value Upon detection of a leak which flows from the hot water circulation pipe in the mist heat exchanger to the mist water supply pipe by recognized mist sauna apparatus characterized by comprising a safety device to stop the operation. A mist drain pipe is branched from the mist feed pipe downstream from the mist heat exchanger, and a drain on / off valve is provided on the mist drain pipe, the feed on / off valve and the mist on / off valve are closed, and the drain on / off valve is closed. In the open state, the hot water circulation operation is performed prior to the mist sauna operation, and the temperature of the hot water in the hot water circulation line rises to a predetermined temperature, and then the mist heat exchanger in the mist water supply line and the mist open / close valve Leakage that flows out from the hot water circulation line to the mist water supply line in the heat exchanger for mist when the temperature rise of the water in the mist water supply line is observed over a predetermined value. claim 1 Symbol placement mist sauna apparatus is characterized in that to detect the. Connected to the heat source machine, the hot water circulation pipe through which the hot water supplied from the heat source machine circulates, the mist nozzle that sprays hot water for mist sauna in the bathroom in mist form, and for mist that supplies clean water to the mist nozzle Mist with hot water flowing through the hot water circulation line, a mist opening / closing valve provided in front of the mist nozzle of the water supply pipe line, the mist nozzle of the mist water supply line, a water supply opening / closing valve arranged in the water supply line for mist to open and close the water supply A mist heat exchanger provided between the hot water circulation line and the mist water supply line to heat the water flowing through the water supply line, and the hot water circulation for flowing hot water from the heat source device to the hot water circulation line When the temperature of hot water in the hot water circulation line rises above the specified temperature and the mist sauna is operated by opening the water supply valve, the mist heat exchanger in the mist supply line is operated within the specified time. Of water between the mist and the mist valve By but not to a temperature above a predetermined value, it detects the leakage flowing out of the mist supply water conduit in the mist heat exchanger to the hot water circulation pipe, with a safety device to stop the operation when it detects a leak features and to Rumi Sutosauna device that.

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