JP4607021B2 - Mist sauna equipment - Google Patents

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-to-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 heat exchanger via a heat medium circuit (for example, Patent Document 1). reference).

  In this configuration, a water supply valve provided in the portion of the spray flow path upstream of the liquid heat exchanger and a spray valve provided in the portion of the spray flow path downstream of the liquid heat exchanger are provided. In addition, a drainage channel provided with a drainage valve is branched and connected to a portion of the spraying channel between the liquid heat exchanger and the spraying valve. Then, when the supply of the heat medium to the liquid heat exchanger is stopped and switched from the hot water spray to the cold water spray, the spray valve is closed and the drain valve is opened while the water supply valve is opened. The heated residual water remaining in the liquid heat exchanger is drained through the drainage channel, and then the drain valve is closed and the spray valve is opened to start the cold water spray.

By the way, if the drainage flow rate is large, when the drainage valve is closed after drainage, a water hammer phenomenon is likely to occur. In order to eliminate such a problem, it is conceivable to reduce the drainage flow rate by reducing the diameter of the outlet portion of the drainage channel. However, at the outlet part of the drainage channel, precipitates are likely to accumulate due to repeated water thirst. It becomes impossible to drain.
Japanese Patent Laying-Open No. 2005-204712 (0024-0027, FIGS. 1 and 2)

  In view of the above points, the present invention can ensure the drainage of the residual water of the liquid-to-heat exchanger during drainage operation over a long period of time and can also prevent the occurrence of a water hammer phenomenon when drainage is stopped. The problem is to provide a mist sauna device.

In order to solve the above-described problems, the present invention includes a heat source device, a spray head disposed in a bathroom, and a liquid-to-heat exchanger provided in a spray flow channel connected to the spray head, and supplies the spray head. A mist sauna device in which water is heated by a heat medium supplied from a heat source device to a liquid heat exchanger via a heat medium circuit and sprayed with hot water from a spray head. A liquid feed heat exchange valve is provided with a water supply valve interposed in the spray flow path portion upstream of the exchanger and a spray valve interposed in the spray flow path portion downstream of the liquid heat exchanger. A water supply valve in a state in which a drainage passage provided with a drainage valve is branched and connected to a portion of the spraying channel between the container and the spraying valve, and the spraying valve is closed at a predetermined time before the start of mist operation And drainage valve to open residual water from the liquid-to-liquid heat exchanger through the drainage channel. In those comprising cormorants discharge control means, the orifice is provided in a portion of the upstream side of the drainage channel of the drainage valve, the discharge control means, when stopping the drainage operation, to close the drain valve from the by closing the water supply valve It is comprised as follows.

  According to the present invention, the drainage flow rate is reduced by the orifice. Therefore, the occurrence of the water hammer phenomenon when the drainage operation is stopped is prevented. Further, since the position of the orifice is on the upstream side of the drain valve, the orifice is always immersed in water, and the orifice is not clogged with deposits. Therefore, the certainty of drainage of the residual water of the liquid-to-liquid heat exchanger during drainage operation can be ensured for a long time.

  By the way, if it is attempted to close the drain valve in a state where the water supply valve is kept open, that is, in a state where the water supply pressure is applied to the drain valve, the drain valve may chatter and cause water stoppage failure. Here, if the drainage control means is configured to close the drainage valve after closing the feedwater valve when the drainage operation is stopped, the drainage valve is closed without receiving the feedwater pressure. Thus, water stoppage failure due to chattering of the drain valve is prevented.

The predetermined time for performing the water-discharge operation is Ru der before the start of the mist operation. According to this, even if the residual water of the liquid heat exchanger is contaminated for some reason while the mist operation is stopped, the mist operation is started after draining the residual water. Spraying from the spray head can be prevented.

  In the embodiment to be described later, what corresponds to the drainage control means is processing in steps S2 to S5 in FIG.

  Referring to FIG. 1, reference numeral 1 denotes a bathroom. 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. Then, by the operation of the heat source device 5, the heat medium (water, antifreeze liquid, etc.) heated by the heat source device 5 is supplied to the radiator 4 through the heat medium circulation path 6, and the air heated by the radiator 4 circulates. The fan 1 circulates in the bathroom 1 and the bathroom 1 is heated. Note that a heating terminal other than the bathroom heater 3 is also connected to the heat source unit 5 via a separate heat medium circulation path as necessary.

  Water is supplied to the spraying head 2 through a spraying channel 9 connected to the water pipe 7 through a check valve 8. A liquid heat exchanger 10 is interposed in the spraying channel 9. Then, the heat medium heated by the heat source device 5 is supplied to the liquid-to-liquid heat exchanger 10 via the heat-medium circulation path 11 for the liquid-to-heat exchanger branched from the heat medium circulation path 6 for the bathroom heater 3. The water supplied to the spray head 2 can be heated by the heat medium in the liquid-liquid heat exchanger 10. A heat medium valve 12 is interposed in the heat medium circulation path 11 so that the supply of the heat medium to the liquid-to-liquid heat exchanger 10 is shut off when the heat medium valve 12 is closed. In addition, the heat medium valve 12 of this embodiment is comprised with the flow volume adjustment valve which can adjust the flow volume of a heat medium. The heat medium circulation path 11 is provided with a heat medium temperature sensor 13 for detecting the temperature of the heat medium flowing through the heat medium circulation path 11.

  A water supply valve 14 comprising an electromagnetic valve is interposed in the spraying channel 9 at the upstream portion of the liquid-liquid heat exchanger 10, and is positioned at the downstream portion of the liquid-liquid heat exchanger 10. A spray valve 15 made of an electromagnetic valve is interposed. The water supply to the liquid heat exchanger 10 is shut off by closing the water supply valve 14, and the water supply to the spray head 2 is shut off by closing the spray valve 15. Further, a spray temperature sensor 16 for detecting the temperature of the spray passage 9 is provided in a portion of the spray passage 9 between the liquid heat exchanger 10 and the spray valve 15.

  Further, a drainage channel 17 is branched and connected to a portion of the spraying channel 9 between the liquid heat exchanger 10 and the spray valve 15. In the drainage channel 17, a drainage valve 18 composed of an electromagnetic valve is interposed, and an orifice 19 is interposed in a portion of the drainage channel 17 upstream of the drainage valve 18.

  The liquid heat exchanger 10, the heat medium valve 12, the heat medium temperature sensor 13, the water supply valve 14, the spray valve 15, the spray temperature sensor 16, and the drain valve 18 are incorporated in a spray unit 20 that is separate from the heat source unit 5. Yes. Then, detection signals from the heat medium temperature sensor 13 and the spray temperature sensor 16 are input to the spray controller 21 provided in the spray unit 20, and the heat controller 12, the water supply valve 14, the spray valve 15, and the drain valve 18 are input by the spray controller 21. To control. The spray controller 21 is communicably connected to a controller (not shown) for the heat source unit 5. Further, a remote controller (not shown) is communicably connected to the spray controller 21, and when the mist switch provided on the remote controller is turned on and a mist operation start command is issued, the mist operation control by the spray controller 21 is performed. .

  The details of the mist operation control are as shown in FIG. 2. First, at step S1, it is determined whether or not a mist operation start command has been issued. When the start command is issued, the water supply valve 14 and the drain valve 18 are opened in step S2. Here, the spray valve 15 is maintained in a closed state, and the residual water of the liquid heat exchanger 10 is drained through the drainage channel 17 by opening the water supply valve 14 and the drainage valve 18. Next, in step S3, it is determined whether or not a predetermined time has elapsed from the start of drainage operation by opening the water supply valve 14 and the drain valve 18, and when the predetermined time has elapsed, the water supply valve 14 is turned on in step S4. Next, the drain valve 18 is closed in step S5. The predetermined time is set in accordance with the time necessary for completely draining the residual water of the liquid heat exchanger 10.

  Thus, according to the present embodiment, the residual water in the liquid heat exchanger 10 is drained before the start of the mist operation, and the residual water in the liquid heat exchanger 10 is caused for some reason while the mist operation is stopped. Even if it is contaminated, it is possible to prevent the contaminated residual water from being sprayed from the spray head 2.

  Here, if the drainage flow rate is large, a water hammer phenomenon occurs when the water supply valve 14 is closed to stop the drainage operation. In this embodiment, the orifice 19 is interposed in the drainage channel 17 as described above. Therefore, the drainage flow rate is reduced and the occurrence of the water hammer phenomenon is prevented. Further, since the position of the orifice 19 is the portion of the drainage channel 17 on the upstream side of the drainage valve 18, the orifice 19 is always immersed in water. Accordingly, deposits that are likely to occur at portions where water is often thirsty are not deposited in the orifice 19, and poor drainage due to clogging of the orifice 19 is prevented. As a result, it is possible to ensure the certainty of drainage of the residual water of the liquid heat exchanger 10 during the drain operation for a long period of time.

  It is also conceivable that the drain valve 18 is first closed when the drain operation is stopped. However, in this case, the drain valve 18 is closed in a state of receiving the supply water pressure, and there is a possibility that the drain valve 18 chatters and a water stop failure occurs. On the other hand, in the present embodiment, when the drainage operation is stopped, the water supply valve 14 is closed and then the drainage valve 18 is closed. Therefore, the drainage valve 18 is closed without receiving the water supply pressure. A water stop failure due to chattering of the valve 18 is prevented.

  After stopping the drainage operation as described above, an operation command is sent to the heat source unit 5 in step S6 to operate the heat source unit 5 and open the heat medium valve 12, and the heat heated by the heat source unit 5 The medium is supplied to the liquid-to-liquid heat exchanger 10 via the heat medium circulation path 11. Next, it is determined in step S7 whether or not the detected temperature Tn of the heat medium temperature sensor 13 has risen to a predetermined preheating completion temperature YTn. When Tn ≧ YTn, the water supply valve 14 and the spray are determined in step S8. The valve 15 is opened. As a result, the hot water heated by the liquid heat exchanger 10 is supplied to the spray head 2, and the mist operation for spraying the hot water from the spray head 2 is started. In the present embodiment, the preheating completion timing of the liquid heat exchanger 10 is determined based on the detected temperature Tn of the heat medium temperature sensor 13, but the heat medium temperature sensor 13 is omitted for cost reduction. The preheat completion time of the liquid heat exchanger 10 may be determined based on the detected temperature Tf of the spray temperature sensor 16. In this case, it is determined in step S7 whether or not the detected temperature Tf of the spray temperature sensor 16 has increased by a predetermined temperature (for example, 7 ° C.) from the initial temperature. Proceed to step S8.

  After the water supply valve 14 and the spray valve 15 are opened as described above in step S8 and the mist operation is started, the process proceeds to step S9, and the detected temperature Tf of the spray temperature sensor 16 is maintained at a predetermined set temperature. As described above, the temperature control for controlling the flow rate of the heat medium is performed by the heat medium valve 12. And it is discriminate | determined whether the stop command of mist driving | operation was issued by the step of S10, and temperature control is continued until a stop command is issued.

  When the stop command is issued, the heat medium valve 12, the water supply valve 14, and the spray valve 15 are closed in step S11, and the operation stop command is transmitted to the heat source unit 5 to end the mist operation. In addition, even if the heat source machine 5 receives the operation stop command from the spray controller 21, the operation is continued during the heating operation of the heating terminal including the bathroom heater 3.

  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 embodiment, the drainage operation is performed every time before the start of the mist operation, but the elapsed time from the end of the previous mist operation is measured, and when this elapsed time becomes a predetermined time or more Alternatively, the drainage operation before the start of the mist operation may be performed. In addition, after the mist operation in which the hot water heated by the liquid heat exchanger 10 is sprayed from the spray head 2, the supply of the heat medium to the liquid heat exchanger 10 is stopped and the cold water sprays the cold water from the spray head 2. When performing a mist operation, you may make it drain the drainage operation by the process similar to the step of S2-S5 before the start of cold water mist operation, and drain the heated residual water of the liquid heat exchanger 10.

  Moreover, in the said embodiment, although an operation command is sent to the heat source machine 5 after completion | finish of drainage operation, the heat-medium valve 12 is opened, and the preheating operation of the liquid heat exchanger 10 is started, It is also possible to start preheating operation. Further, in the above embodiment, the heat medium valve 12 is configured by a flow rate control valve, and the temperature for maintaining the detected temperature Tf of the spray temperature sensor 16 at the set temperature by adjusting the flow rate of the heat medium by the heat medium valve 12 during the mist operation. Although the temperature control is performed, the heat medium valve 12 is configured with an on-off valve and the water supply valve 14 is configured with a flow rate control valve, and the temperature control is performed by adjusting the amount of water flow through the water supply valve 14 during mist operation. Also good.

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

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Bath, 2 ... Spray head, 5 ... Heat source machine, 9 ... Spray channel, 10 ... Liquid heat exchanger, 11 ... Heat medium circulation path, 14 ... Water supply valve, 15 ... Spray valve, 17 ... Drainage channel , 18 ... drain valve, 21 ... spray controller.

Claims (1)

A heat source device, a spray head arranged in a bathroom, and a liquid heat exchanger interposed in a spray channel connected to the spray head, and water supplied to the spray head from the heat source device via a heat medium circulation path A mist sauna device that is heated by a heat medium supplied to a liquid heat exchanger and sprays hot water from a spray head, and is a portion of a spray channel upstream of the liquid heat exchanger A spray valve provided between the liquid heat exchanger and the spray valve, and a spray valve provided in the spray channel downstream of the liquid heat exchanger. A drainage channel with a drainage valve is branched and connected to this part, and the water supply valve and drainage valve are opened while the spray valve is closed at a predetermined time before the start of mist operation. In drainage control means that performs drainage operation to drain the residual water of the exchanger through the drainage channel
An orifice is provided in the portion of the drainage channel upstream of the drainage valve, and the drainage control means is configured to close the drainage valve after closing the water supply valve when the drainage operation is stopped. Mist sauna equipment.

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