JP2014031971A - Mist sauna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mist sauna device which prevents contamination of water supply caused by backflow and excessive rise of internal pressure of a channel for spraying, which can be easily installed as drain pipes are removed and which is compact.SOLUTION: A first electromagnetic valve 10 is provided at a channel 7 for spraying on the upstream side of a fluid-fluid heat exchanger 11. A second electromagnetic valve 12 is provided at the channel 7 for spraying on the downstream side of the fluid-fluid heat exchanger 11. At the channel for spraying on the upstream side of the first electromagnetic valve 10, a check valve 9 is provided for allowing the flow of water directed toward the first electromagnetic valve 10 and for preventing backflow directed from the first electromagnetic valve 10 toward the upstream direction. A first overpressure escaping means 20 is provided for escaping internal pressure of the channel 7 for spraying between the first electromagnetic valve 10 and the check valve 9 when the first electromagnetic valve 10 is closed. A second overpressure escaping means 22 is provided for escaping internal pressure of the channel 7 for spraying between the first electromagnetic valve 10 and the second electromagnetic valve 12 when both the first electromagnetic valve 10 and the second electromagnetic valve 12 are closed.

Description

  The present invention relates to a mist sauna apparatus in which hot water is sprayed from a spray head arranged in a bathroom so as to obtain a sauna effect.

  Conventionally, as this type of mist sauna device, a heat source device, a spray head arranged in a bathroom, and a liquid-liquid heat exchanger interposed in a spray flow channel connected to the spray head, water supplied to the spray head is provided. It is known that a mist operation is performed in which warm water is sprayed from a spray head by heating with a heat medium supplied from a heat source device to a liquid-liquid heat exchanger via a heat medium circuit (for example, Patent Document 1). reference).

  In this device, two electromagnetic valves are provided in series in the spraying channel on the downstream side of the liquid-liquid heat exchanger, and a drain pipe that branches from a portion between both electromagnetic valves of the spraying channel is provided. . The drain pipe is for draining the inside of the spraying channel to the outside, and an electromagnetic valve for opening and closing the drain pipe is interposed.

  In the liquid-liquid heat exchanger, circulating water for hot water heating in the bathroom is generally supplied from a heat source device as a heat medium for the heat medium circulation path. A hole may be opened due to corrosion or the like at a portion where the path is in contact with each other, and the spraying channel and the heat medium circulation channel may be short-circuited.

  Circulating water for bathroom heating may be water or a liquid in which an antifreeze such as propylene glycol is mixed in the water. If the above short circuit occurs in the liquid-liquid heat exchanger, the water for spraying is used. There is a risk that the circulating water for bathroom heating will be mixed into the water pipe and will flow backward to the water pipe connected to the upstream end of the spraying channel and contaminate the water supply. In order to prevent this, a check valve is provided in the spraying channel upstream of the liquid-liquid heat exchanger.

  Moreover, only the bathroom heating operation may be performed without performing the mist operation. In this case, if the two solenoid valves of the spray channel and the solenoid valve of the drain pipe are closed, the liquid-liquid heat exchanger and its surroundings are in a high-temperature atmosphere without any water flow in the spray channel. Therefore, the internal pressure of the spray flow path between each solenoid valve and the check valve may increase. When the internal pressure of the spraying flow path becomes high, problems such as the inability to smoothly open the solenoid valves occur. For this reason, when only the bathroom heating operation is performed without performing the mist operation, only the solenoid valve of the drain pipe is opened, or the connection pipe connecting the spray flow path downstream of the check valve and the drain pipe is provided. Provided, an overpressure relief means is provided in the connecting pipe.

JP 2010-194341 A (FIG. 4)

  By the way, since the conventional mist sauna device includes a drain pipe for draining from the spray channel to the outside, not only a space for providing a drain pipe inside the mist sauna device is required, but also the above-mentioned. The structure becomes complicated because the drainage solenoid valve, the connecting pipe, and the overpressure relief means are provided. For this reason, there has been a disadvantage that the mist sauna device cannot be made compact and low in cost. Furthermore, when installing the mist sauna apparatus, since piping construction for connecting the drain pipe is necessary, there is a disadvantage that the efficiency during the installation work is lowered.

  In view of the above points, the present invention provides a compact mist sauna device that is easy to install and eliminates drainage pipes after preventing contamination of waterworks due to backflow and excessive increase in the internal pressure of the spray channel. The purpose is to provide.

  In order to achieve such an object, the present invention comprises a heat source device, a spray head arranged in a bathroom, and a liquid-liquid heat exchanger interposed in a spray flow path connected to the spray head, the spray head having In the mist sauna apparatus in which water to be supplied is heated by a heat medium supplied from a heat source device to the liquid-liquid heat exchanger via a heat medium circulation path, and mist operation is performed to spray hot water from the spray head. A first electromagnetic valve for opening and closing the spraying channel upstream of the liquid-liquid heat exchanger; a second electromagnetic valve for opening and closing the spraying channel downstream of the liquid-liquid heat exchanger; and the first A check valve interposed in the spray flow path upstream of the solenoid valve to allow a water flow toward the first solenoid valve and prevent a reverse flow upstream from the first solenoid valve; When the solenoid valve is closed, the spraying between the first solenoid valve and the check valve The first overpressure relief means for releasing the internal pressure of the passage, and when both the first solenoid valve and the second solenoid valve are closed, the first solenoid valve and the second solenoid valve And a second overpressure releasing means for releasing the internal pressure of the spraying channel.

  In the present invention, the first electromagnetic valve is provided in the spraying channel upstream of the liquid-liquid heat exchanger, and the check valve is provided in the spraying channel upstream of the first electromagnetic valve. According to this, since the first solenoid valve is located between the liquid-liquid heat exchanger and the check valve, even if one of the first solenoid valve and the check valve malfunctions, the other operates. Thus, contamination of the water supply can be reliably prevented.

  In addition, when the first solenoid valve is closed, even if the internal pressure of the spray flow path between the first solenoid valve and the check valve increases excessively, the excessive internal pressure at this time is It can be released by pressure relief means. Further, when the first solenoid valve and the second solenoid valve are closed, even if the internal pressure of the spray passage between the two solenoid valves rises excessively, the excessive internal pressure at this time is the second overpressure. It can be escaped by escape means.

  In the first overpressure relief means and the second overpressure relief means, for example, it is conceivable to release the internal pressure of the spray channel inside the housing of the mist sauna device. In this case, the water in the spray channel flows out from the first overpressure relief means and the second overpressure relief means according to the released pressure, but the amount of water at this time is extremely small. It can be quickly evaporated by the high temperature atmosphere inside the housing of the apparatus.

  As described above, even if the internal pressure between the valves provided in the spray flow path is excessively increased, the excessive internal pressure can be smoothly released by the first overpressure relief means and the second overpressure relief means. Therefore, it is not necessary to release the internal pressure of the spraying flow path using a drain pipe as in the prior art, and therefore a drain pipe can be dispensed with.

  And since a drain pipe is unnecessary, a drain pipe can be abolished and the installation operation | work is easy and can provide a compact mist sauna apparatus.

  In the present invention, the spray flow path between the check valve and the first electromagnetic valve, and the spray flow path between the first electromagnetic valve and the second electromagnetic valve, A bypass circuit that bypasses and connects the first solenoid valve is provided, the first overpressure relief means is interposed in the bypass circuit, and the check valve and the first electromagnetic valve that are released by the first overpressure relief means An internal pressure of the spraying channel between the valves is introduced into the spraying channel between the first electromagnetic valve and the second electromagnetic valve through the bypass.

  With this configuration, when the internal pressure of the spray flow path between the check valve and the first electromagnetic valve increases excessively, the excessive internal pressure at this time is generated by the first overpressure relief means via the detour to the first electromagnetic valve. It introduce | transduces into the flow path for spraying between a valve and the 2nd solenoid valve. Then, the excessive internal pressure introduced into the spray passage between the first electromagnetic valve and the second electromagnetic valve is released by the second overpressure relief means. Thus, by providing the detour with the first overpressure relief means, the discharge outlet for excessive pressure in the spraying channel can be gathered in one place, and the mist sauna device is simple and compact in structure. Can be configured.

Explanatory drawing which shows the circuit of the mist sauna apparatus in embodiment of this invention.

  An embodiment of the mist sauna apparatus of the present invention will be described with reference to FIG. In the bathroom 1, a spray head 2 and a bathroom heater 3 are arranged. The bathroom heater 3 includes a circulation fan (not shown) that circulates the air in the bathroom 1 and a radiator 4. The radiator 4 is connected to a heat source device 5 disposed outside the bathroom 1 (outdoors or the like) via a heat medium circulation path 6.

  Due to the operation of the heat source unit 5, a heat medium heated by the heat source unit 5 (water or a liquid in which an antifreeze is mixed in water) is supplied to the radiator 4 through the heat medium circulation path 6. The heated air is circulated to the bathroom 1 by the circulation fan, and the heating operation of the bathroom 1 is performed. Although schematically shown in FIG. 1, the spray head 2 and the bathroom heater 3 are generally disposed on the ceiling of the bathroom 1.

  Spray water is supplied to the spray head 2 via the spray channel 7. In the spray flow path 7, a drain plug with filter 8, a check valve 9, a first electromagnetic valve 10, a liquid-liquid heat exchanger 11, and a second electromagnetic valve 12 are interposed in this order from the upstream side. A water pipe (not shown) is connected to the upstream end of the spray channel 7.

  The heat medium heated by the heat source device 5 is supplied to the liquid-liquid heat exchanger 11 through the heat medium branch circuit 13 for the liquid-liquid heat exchanger 11 branched from the heat medium circuit 6 for the bathroom heater 3. Is done. The water for spraying toward the spray head 2 is heated by the heat medium in the heat medium branch circuit 13 in the liquid-liquid heat exchanger 11. The mist sauna operation is performed by spraying heated spray water from the spray head 2 to the bathroom 1.

  A thermal valve 14 is interposed in the heating medium circulation path 6, and a flow rate control valve 15 is interposed in the heating medium branch circulation path 13. The thermal valve 14 opens and closes the heat medium circulation path 6, and the flow rate control valve 15 opens and closes the heat medium branch circulation path 13. The heat medium circulation path 6 is provided with a heat medium temperature sensor 16 for detecting the temperature of the heat medium.

  The liquid-liquid heat exchanger 11 is arranged in an upright posture so that the upstream side of the spraying channel 7 is located below and the downstream side is located above. Then, the water supply to the liquid-liquid heat exchanger 11 is shut off when the first electromagnetic valve 10 is closed, and the water supply to the spray head 2 is shut off when the second electromagnetic valve 12 is closed. Between the liquid-liquid heat exchanger 11 and the second electromagnetic valve 12 in the spray channel 7, a spray temperature sensor 17 that detects the temperature of the spray water flowing through the spray channel 7 is provided. The spray channel 7 is not provided with a conventional drain pipe.

  By providing the first electromagnetic valve 10 and the second electromagnetic valve 12 in the spraying flow path 7, the valve is closed by foreign matter being caught in either the first electromagnetic valve 10 or the second electromagnetic valve 12. Even if a defect occurs, the spray channel 7 can be reliably blocked by the other, and useless use of tap water can be prevented.

  Further, by providing the first electromagnetic valve 10 on the upstream side of the liquid-liquid heat exchanger 11, for example, the liquid-liquid heat exchanger 11 is corroded or cracked, and the spray flow path 7 and the heat medium branch circulation path 13 are formed. Can be forcibly stopped by closing the first electromagnetic valve 10 in a state where the two are short-circuited.

  The liquid-liquid heat exchanger 11, the flow rate control valve 15, the heat medium temperature sensor 16, the first electromagnetic valve 10, the second electromagnetic valve 12, the spray temperature sensor 17 and the check valve 9 are sprayed separately from the heat source unit 5. It is accommodated in the housing 18 as a unit.

  A bypass path 19 that bypasses the first electromagnetic valve 10 is provided at a position between the check valve 9 and the liquid-liquid heat exchanger 11. The bypass 19 has an upstream end connected to the spray passage 7 between the check valve 9 and the first solenoid valve 10, and a downstream end connected between the first solenoid valve 10 and the liquid-liquid heat exchanger 11. It is connected to the flow path 7 for spraying.

  The bypass 19 is provided with a first overpressure relief valve 20 (first overpressure relief means). The first overpressure relief valve 20 opens when the internal pressure of the spray passage 7 between the check valve 9 and the first electromagnetic valve 10 becomes excessively high, and releases the pressure downstream of the bypass 19. .

  The interior of the housing 18 tends to be in a high temperature atmosphere due to the heat released from the heat medium circulation path 6 and the liquid-liquid heat exchanger 11 during the heating operation of the bathroom 1. When the mist sauna operation is not performed during the heating operation of the bathroom 1, the first electromagnetic valve 10 is closed, so that the internal pressure of the spray passage 7 between the check valve 9 and the first electromagnetic valve 10 increases. To do. When the internal pressure of the spray flow path 7 between the check valve 9 and the first electromagnetic valve 10 becomes excessively high, the first overpressure relief valve 20 is activated.

  At this time, the downstream end of the bypass circuit 19 provided with the first overpressure relief valve 20 is connected to the spray flow path 7 between the first electromagnetic valve 10 and the liquid-liquid heat exchanger 11. The pressure released by the first overpressure relief valve 20 is introduced into the spray flow path 7 between the first electromagnetic valve 10 and the liquid-liquid heat exchanger 11.

  Further, the upstream end of the branch path 21 is connected to the spray flow path 7 between the liquid-liquid heat exchanger 11 and the second electromagnetic valve 12. The branch path 21 is provided with a second overpressure relief valve 22 (second overpressure relief means). The downstream end of the branch path 21 is opened inside the housing 18. A tray-shaped water receiver 23 is provided at least below the open downstream end of the branch path 21.

  The second overpressure relief valve 22 is opened when the internal pressure of the spray passage 7 between the first solenoid valve 10 and the second solenoid valve 12 becomes excessively high, and the pressure is released from the downstream end of the branch passage 21. Escape into the housing 18. An increase in the internal pressure of the spray passage 7 between the first electromagnetic valve 10 and the second electromagnetic valve 12 also occurs when the inside of the housing 18 becomes a high temperature atmosphere.

  At the downstream end of the branch path 21, the excessive internal pressure of the spray flow path 7 between the first electromagnetic valve 10 and the second electromagnetic valve 12 is released, so that an amount of spray water corresponding to the excessive pressure overflows. . At this time, although the amount of spray water overflowing from the downstream end of the branch path 21 is very small, the spray water dripped downward from the downstream end of the branch path 21 is captured by the water receiver 23. Then, when the inside of the housing 18 becomes a high temperature atmosphere, the spray water accumulated in the water receiver 23 is easily evaporated.

  In the above embodiment, the first overpressure relief valve 20 can relieve excessive internal pressure of the spray flow path 7 between the check valve 9 and the first electromagnetic valve 10, and the second overpressure relief valve. 22 makes it possible to relieve excessive internal pressure of the spray flow path 7 between the first solenoid valve 10 and the second solenoid valve 12, and therefore it is difficult to open both the solenoid valves 10 and 12 due to the pressure. The situation can be prevented.

  In addition, since an excessive increase in the internal pressure of the spray channel 7 can be prevented even if a conventional drain pipe is not provided, the drain pipe can be eliminated and installation work can be facilitated and the apparatus can be made compact. Can be configured.

  Further, the excessive internal pressure of the spraying flow path 7 between the check valve 9 and the first electromagnetic valve 10 is caused by the operation of the first overpressure relief valve 20 and the first electromagnetic valve 10 and the first electromagnetic valve 10 via the bypass circuit 19. 2 is introduced into the spray flow path 7 between the electromagnetic valve 12 and is released from the downstream end of the branch path 21 by the operation of the second overpressure relief valve 22. Thus, since the discharge outlet of the excessive pressure of the spray channel 7 can be gathered in one place, the apparatus can be configured compactly.

  By the way, when used for a long period of time, the heat medium may be mixed into the spray water due to corrosion inside the liquid-liquid heat exchanger 11 or the like. As the heat medium, water or a liquid obtained by mixing water with an antifreeze such as propylene glycol is employed. For this reason, it is not preferable that the heat medium enters the spray channel 7 and is mixed into the spray water. However, even if the heat medium is mixed into the spray water in the spray channel 7, the second electromagnetic valve 12 and the check valve 9 reliably prevent backflow. Therefore, the heat medium is not mixed into the water pipe connected to the upstream end of the spraying flow path 7, and it is possible to reliably prevent the situation where the water is contaminated.

  In the present embodiment, the bypass 19 is provided to reduce the excessive internal pressure of the spray flow path 7 between the check valve 9 and the first solenoid valve 10 to the first solenoid valve 10 and the second solenoid valve 12. Although not shown in the drawing, the downstream end is opened to the spraying channel 7 between the check valve 9 and the first electromagnetic valve 10. A branch path may be connected, and a first overpressure relief valve 20 (first overpressure relief means) may be provided in the branch path. Also in this case, by providing a tray-shaped water receiver below the open downstream end of the branch path, the spray water leaking from the branch path can be evaporated by the high-temperature atmosphere inside the housing 18.

  DESCRIPTION OF SYMBOLS 1 ... Bathroom, 2 ... Spray head, 5 ... Heat source machine, 6 ... Heat-medium circulation path, 7 ... Spray path, 9 ... Check valve, 10 ... 1st solenoid valve, 11 ... Liquid-liquid heat exchanger, 12 2nd solenoid valve, 19 ... detour, 20 ... 1st overpressure relief valve (1st overpressure relief means), 22 ... 2nd overpressure relief valve (2nd overpressure relief means).

Claims (2)

A heat source device, a spray head disposed in a bathroom, and a liquid-liquid heat exchanger interposed in a spray flow path connected to the spray head, and water supplied to the spray head is supplied from the heat source device to a heat medium circulation path. In a mist sauna device that is heated by a heat medium supplied to the liquid-liquid heat exchanger via the mist operation to spray hot water from the spray head,
A first solenoid valve that opens and closes the spray passage upstream of the liquid-liquid heat exchanger;
A second solenoid valve that opens and closes the spray passage downstream of the liquid-liquid heat exchanger;
A check valve interposed in the spray flow path upstream of the first solenoid valve to allow a water flow toward the first solenoid valve and prevent a reverse flow upstream from the first solenoid valve;
First overpressure relief means for releasing the internal pressure of the spray passage between the first solenoid valve and the check valve when the first solenoid valve is closed;
When both the first solenoid valve and the second solenoid valve are closed, a second overpressure relief that relieves the internal pressure of the spray passage between the first solenoid valve and the second solenoid valve. And a mist sauna device. The spraying passage between the check valve and the first solenoid valve and the spraying passage between the first solenoid valve and the second solenoid valve bypass the first solenoid valve. Provide a detour to connect
The first overpressure relief means is provided in the bypass,
The internal pressure of the spray flow path between the check valve and the first solenoid valve released by the first overpressure relief means is passed between the first solenoid valve and the second solenoid valve through the bypass. The mist sauna apparatus according to claim 1, wherein the mist sauna apparatus is introduced into the spraying channel.

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