JP4268541B2 - Bathroom heating dryer with mist sauna function - Google Patents

Description

  The present invention relates to a bathroom heater / dryer having a mist sauna function.

  Conventionally, in order to realize a mist sauna, there has been one in which water is heated, a small amount of water is sprayed from a mist nozzle, and heated by warm air so that a mist sauna bath can be made in a bathroom.

  As an example, there is known a hot water jetting device provided with hot water jetting means for jetting a mist or a shower toward a human body location where a bather is expected to exist (see, for example, Patent Document 1).

By the way, in mist operation, 40 ° C. is preferred for a mild mist sauna (mist spray amount of 0.5 liter / min, for example), and 43 ° C. for a hard mist sauna (mist spray amount of 1.0 liter / min, for example). Is preferred. Therefore, generally, it is necessary to satisfy the required temperature of the bathroom of 38 ° C. to 46 ° C. (preferably 40 ° C. to 43 ° C.) during the mist operation. However, the heat load of the bathroom varies greatly depending on the size of the bathroom, its thermal insulation performance, and changes in the outside air temperature due to the four seasons. In addition, the temperature conditions of the comfortable mist sauna differ depending on the difference between men and women, constitution and age. Conventionally, the user manually adjusts the bathroom temperature, and the manual operation is troublesome, and the adjustment is performed by hand. Therefore, it has been difficult to maintain a comfortable bathroom temperature according to the user's preference.
JP 2002-336155 A

  The present invention has been invented in view of the above-described conventional problems, and automatically controls the required temperature (38 ° C. to 46 ° C.) of the bathroom regardless of the size of the bathroom and the change in the outside air temperature due to the four seasons. Therefore, it is an object of the present invention to provide a bathroom heater / dryer with a mist sauna function that can easily obtain a comfortable sauna effect without being aware of the adjustment of the bathroom temperature.

In order to solve the above problems, a bathroom heating dryer with a mist sauna function according to the present invention includes a heating dryer body 2 that supplies hot air into the bathroom 13, a mist spraying device 3 that sprays hot water in a mist form, The heating / drying machine main body 2 includes a circulation fan 5, a hot air heat exchanger 7 that heats the air from the circulation fan 5 with hot water, and a hot air It has a hot air control valve 8 that adjusts the amount of hot water supplied to the heat exchanger 7, and a bathroom temperature sensor 9 that detects the bathroom temperature near the ceiling. A mist nozzle 10 for spraying water, a mist heat exchanger 11 for heating water supplied to the mist nozzle 10, and a mist control valve 12 for adjusting the amount of hot water supplied to the mist heat exchanger 11. Then, the control unit 4 adjusts to the target set temperature. That bath temperature of bath temperature detected by the sensor 9 temperature deviation Delta] t (= bath temperature is detected by the full temperature sensor 9 - target setting temperature) of the circulation fan 5 in accordance with temperature deviation Delta] t is increased if less than a predetermined level A hot air volume control mode for controlling the air volume level to be lowered stepwise is automatically executed. When the temperature deviation Δt is larger than a predetermined level, the opening degree of the mist control valve 12 is increased as the temperature deviation Δt increases. It is characterized by automatically executing a mist temperature control mode in which the mist temperature is adjusted to be lowered step by step .

  By adopting such a configuration, the hot air volume control mode and the mist temperature control mode are automatically executed according to the magnitude of the temperature deviation. It is possible to prevent an excessive decrease in the temperature below the bathroom where the bather is present, and a troublesome switching operation by manual operation is not required, and a mist operation according to the heat load of the bathroom 13 can be realized. Moreover, regardless of the size of the bathroom 13, its heat insulating performance, and the change in the outside air temperature due to the four seasons, the user is not required to adjust the bathroom temperature, and the required temperature of the bathroom 13 is 38 ° C to 46 ° C (preferably 40 ° C to 43 ° C. ) Can be satisfied.

  In the mist temperature control mode, it is preferable to monitor the outlet temperature of the mist heat exchanger 11 and control the opening degree of the mist control valve 12 so as to gradually decrease the mist spray temperature. In this case, by adjusting the opening of the mist control valve 12 by monitoring the mist spray temperature, the bathroom temperature can be adjusted appropriately even when the heating load is small (when the temperature deviation is large).

  The bathroom heater / dryer with a mist sauna function according to the present invention can perform mist operation according to the heat load of the bathroom by automatic control of the circulating amount of hot air or automatic control of the mist spray temperature. A mist sauna bath can be made at a comfortable temperature without being aware of the temperature adjustment.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 1 shows an example of a bathroom heater / dryer 1 with a mist sauna function according to the present embodiment, FIGS. 2 (a) and 2 (b) show the operation states of the hot air volume control mode and the mist temperature control mode, and FIG. 4 shows a cross-sectional view of the bathroom heater / dryer 1 with a mist sauna function, and FIG. 5 shows a perspective view of the bathroom heater / dryer 1 with a mist sauna function as viewed from below. 4, 50 is a blower provided with a ventilation fan 51, 52 is a blower provided with a circulation fan 5, 53 is a grill plate, 54 is a hot air outlet, 55 is a movable louver, 56a is a mist spraying device 3 A valve box 57 for storing the nozzle valves 24a, 24b, etc., 57 is a suction port, and 58 in FIG. 5 is different from FIG. 4 in which the ventilation fan 51 is built in the heating / drying machine main body 2 and is of the type that the ventilation fan 51 is built in the fan box 70 and attached to the heating / drying machine main body 2. is there. Reference numeral 71 in FIG. 5 denotes a connection port for exhaust, and 72 and 73 denote connection ports for intake of a dressing room or a toilet.

  The bathroom heater / dryer 1 with a mist sauna function, as shown in FIGS. 1 and 3 to 6, is installed on a ceiling portion of the bathroom 13, and supplies a warm air into the bathroom 13. A mist spraying device 3 that sprays hot water in a mist form and a control unit 4 that controls the bathroom to a predetermined temperature are provided. A heat source 14 with a hot water supply function is installed outside the bathroom 13, and a remote control operation unit 15 is installed on the wall inside the bathroom 13. The remote control operation unit 15 includes, for example, a heating operation switch, a ventilation operation switch, a drying operation switch, a cool air operation switch, a mist operation switch, a switch for setting a target set temperature (38 ° C. to 46 ° C.), and the like. The same applies to the wireless remote controller.

  In the example shown in FIG. 1, the heating dryer body 2 includes a heating hot water pipe 16 that is connected to the heat source device 14 with a hot water supply function (FIG. 3) and in which hot water supplied from the heat source device 14 circulates. A hot air heat exchanger 7 heated by hot water from the heat source device 14 is provided in the middle of the heating hot water pipe 16. A warm air control valve 8 (in this example, a thermal valve 8a) for adjusting the amount of hot water supplied is disposed upstream of the hot air heat exchanger 7. A circulation fan 5 that is rotated by an electric motor is disposed above the hot air heat exchanger 7, and the air from the circulation fan 5 is heated by the hot air heat exchanger 7 by opening the thermal valve 8 a. The hot air blowing port 54 below is supplied into the bathroom 13. Also, a bathroom temperature sensor 9 such as a thermistor for detecting the bathroom temperature is disposed in the heating dryer body 2, and a hot water temperature sensor 17 such as a thermistor for detecting the hot water temperature of the hot water pipe 16 for heating is provided. Has been placed.

  Further, the upstream side and the downstream side of the heating hot water pipeline 6 are bypass-connected via a mist heating pipeline 19. The upstream end of the mist heating pipe 19 is branched and connected to a position upstream of the thermal valve 8 a of the heating hot water pipe 16. The downstream end of the mist heating pipe 19 is connected to the heating hot water pipe 16. The hot air heat exchanger 7 is branched and connected to a downstream position.

  On the other hand, the mist box 56 of the mist spraying device 3 is mounted on the upper portion of the box of the heating dryer body 2 as shown in FIG. In the mist box 56, a mist water supply line 20 and a mist drain line 21 are piped. An external water pipe is connected to the upstream end of the water supply pipe 20 for mist through a water supply valve 22 such as an electromagnetic valve and a strainer 23. A mist heat exchanger 11 is arranged in the middle of the mist water supply pipe 20, and a pair of spraying hot water for the mist sauna is sprayed downstream of the first and second nozzle valves 24a and 24b. A mist nozzle 10 is provided. Here, one mist nozzle 10 is for obtaining a mild mist sauna (mist spray amount is, for example, 0.5 liter / min), and the other mist nozzle 10 is a hard mist sauna (mist spray amount is 0.5 liter / min). For example, 1.0 liter / min) is obtained. The first and second nozzle valves 24a and 24b are electromagnetic valves that switch between a pair of mist nozzles 10 and 10. In this example, the nozzle valves 24a and 24b are arranged close to the corresponding mist nozzles 10, respectively. Yes.

  For example, as shown in FIG. 7, the mist heat exchanger 11 includes a plate-type liquid / liquid heat exchanger in which a plurality of corrugated heat transfer plates 7a are stacked. A mist heating pipe 19 is connected to the primary side of the mist heat exchanger 11, a mist water supply pipe 20 is connected to the secondary side, and the mist control valve 12 ( In this example, by opening the water proportional valve 12 a), hot water is supplied to the primary side of the mist heat exchanger 11, so that water passing through the secondary side is heated and supplied to the mist nozzle 10. It has become. Further, a mist temperature sensor 18 such as a thermistor for detecting the mist spray temperature is disposed in the mist water supply line 20.

  A mist drain line 21 is branched from between the mist heat exchanger 11 and the nozzle valves 24a, 24b in the mist feed line 20. The mist drain line 21 is connected to an external drain pipe via a drain valve 26 such as an electromagnetic valve and a vacuum breaker 27, and the nozzle valves 24a and 24b are closed when the mist operation starts. By opening the drain valve 26, the water in the mist water supply pipe 20 can be drained through the mist drain pipe 21. The vacuum breaker 27 functions to prevent the dirty water in the mist drain pipe 21 from flowing back to the mist feed pipe 20 side.

On the other hand, as shown in FIG. 6, the control unit 4 that controls the bathroom to a predetermined temperature receives each detection signal from the bathroom temperature sensor 9, the hot water temperature sensor 17, and the mist temperature sensor 18, and from the remote control operation unit 15. It is constituted by a microcomputer that executes a corresponding operation based on a commanded remote control signal. When the temperature deviation Δt is smaller than a predetermined level, the control unit 4 executes a warm air volume control mode for controlling the air volume by changing the rotation speed of the circulation fan 5 and the temperature deviation Δt is less than the predetermined level. When it is larger, the mist temperature control mode for adjusting the opening of the water proportional valve 12a is executed. In the mist temperature control mode of this example, the outlet temperature of the heat exchanger 11 for mist is monitored, and the water proportional valve 12a is controlled so as to decrease the mist spray temperature stepwise. Here, the temperature deviation Δt means the temperature deviation of the bathroom temperature detected by the bathroom temperature sensor 9 with respect to the target set temperature, that is, the target set temperature subtracted from the bathroom temperature detected by the bathroom temperature sensor 9. .

  Next, the bathroom temperature control operation will be described. When the mist operation is started, the inside of the bathroom 13 can be quickly put into a mist sauna state and heated in a short time by hot air blowing and mist spraying. At this time, the bathroom temperature is detected by the bathroom temperature sensor 9, and the air volume level of the circulation fan 5 is adjusted so that the bathroom temperature approaches the target set temperature.

  However, generally, when the air flow level of the circulation fan 5 is lowered, the heat of hot air is trapped near the ceiling of the bathroom 13, and the temperature gap between the vicinity of the ceiling and the lower part of the bathroom where the bather is located increases. On the other hand, since the bathroom temperature sensor 9 installed near the ceiling detects the temperature near the ceiling, the bathroom where the bather is present even though the bathroom temperature detected by the bathroom temperature sensor 9 is higher than the target set temperature. The temperature near the bottom may be too low.

Therefore, in the present invention, in anticipation of the temperature gap, when the temperature deviation Δt is smaller than a predetermined level (when the heating load is large), the warm air amount control mode shown in FIG. In this warm air volume control mode, the air volume level of the circulation fan 5 is controlled stepwise as the temperature deviation Δt increases. In FIG. 2 (a), the air flow level of the circulation fan 5 is divided into seven stages from the maximum air volume stage A1 to the minimum air volume stage A7, and the temperature deviation Δt is set with the mist heat valve 8a fully opened. When 0, the air flow level of the circulation fan 5 is lowered by one step from A1 to A2, and when the temperature deviation Δt is +1, the air flow level of the circulation fan 5 is further lowered by one step from A2 to A3. Similarly, when the temperature deviation Δt is +5, the air flow level of the circulating fan 5 is further lowered by one step from A6 to A7, and finally the thermal valve 8a is fully closed at A7. The circulation fan 5 is rotating even when the thermal valve 8a is fully closed.

On the other hand, when the temperature deviation is larger than a predetermined level (when the heating load is small), the mist temperature control mode shown in FIG. In this mist temperature control mode, the opening degree of the water proportional valve 12a constituting the mist control valve 12 is adjusted stepwise as the temperature deviation Δt increases. In FIG. 2B, the opening degree of the water proportional valve 12a is divided into five stages from the maximum level B5 to the minimum level B5, and the outlet temperature (mist spray temperature) of the mist heat exchanger 11 is supplied to the mist temperature sensor 18. And the degree of opening of the water proportional valve 12a is lowered or raised stepwise (for example, in increments of 5 ° C.). That is, when the temperature deviation Δt is +4, the opening degree of the water proportional valve 12a is reduced by one step from B1 to B2, and when the temperature deviation Δt is +5, the opening degree of the water proportional valve 12a is further reduced by one step from B2 to B3. . Similarly, when the temperature deviation Δt is +7, the opening degree of the water proportional valve 12a is further reduced by one step from B4 to B5.

  In the example of FIG. 2, the control area of the circulation fan and the adjustment area of the water proportional valve 12a are overlapped in the range of +3 <temperature deviation Δt <+5, but may be overlapped in a wider area. It is not always necessary to overlap.

  According to the above configuration, since the hot air volume control mode and the mist temperature control mode are automatically executed according to the magnitude of the temperature deviation Δt, the harmful effect caused by the heat of the hot air remaining near the ceiling of the bathroom 13 (the bather Therefore, automation of the mist operation according to the heat load of the bathroom 13 can be realized. In other words, it is not affected by the size of the bathroom 13, its thermal insulation performance, or the change in outdoor temperature due to the four seasons. For example, when mist (strong) + warm air heating (strong) is used in winter, or mist (strong) in summer Even when warm air heating (weak) or mist (weak) + warm air heating (OFF) is used, the need for the bathroom 13 is eliminated without performing the troublesome manual switching operation as in the prior art. A temperature of 38 ° C to 46 ° C can be satisfied. As a result, the user can obtain a comfortable sauna effect without being aware of the adjustment of the bathroom temperature and without feeling hot or cold regardless of age or sex.

  In this example, since the temperature deviation Δt is used to start the execution of the mist temperature control mode, that is, using the gap between the temperature detected by the bathroom temperature sensor 9 and the temperature near the center of the bathroom where the bather is present. Since this is done, it is easy to grasp the timing of starting execution of the mist temperature control mode, and therefore there is an advantage that the circuit structure of the control unit 4 can be simplified.

  Further, the mist spraying device 3 may not be used for a long time, and water may be contaminated and stay in the mist water supply pipe 20 for supplying water to the mist nozzle 10, but in this example, the mist operation is disclosed. Occasionally, by performing the operation of closing the nozzle valves 24a and 24b and opening the water supply valve 22 and the drain valve 26, the remaining water in the mist water supply pipe 20 can be drained from the mist drain pipe 21 and the dirt It is possible to prevent water and residual water from spraying into the bathroom 13. Further, since the nozzle valves 24a and 24b are arranged close to the corresponding mist nozzles 10, the distance of the pipe portion 28 between the nozzle valves 24a and 24b and the mist nozzle 10 is shortened, and the mist operation is stopped. Then, after the nozzle valves 24a and 24b are closed, the amount of water accumulated in the pipe portion 28 can be reduced as much as possible, thereby reducing the amount of water (dripping water) that naturally escapes from the mist nozzle 10 when the operation is stopped. In addition to being able to reduce the amount of water, it is possible to prevent water contamination due to air replacement in the pipe portion 28. As a result, a sanitary mist sauna bath can be enjoyed.

  In each of the above-described embodiments, the air flow level of the circulation fan 5 is set to seven levels, and the opening level of the water proportional valve 12a is set to five levels. Moreover, although the case where the air volume adjustment of the circulation fan 5 is performed by increasing / decreasing the rotation speed has been described, it is of course possible to use an adjustment method other than the rotation speed.

  In addition, although 40 ° C to 43 ° C has been given as a preferable example of the target set temperature, this numerical value is, of course, an example. It is free.

  FIG. 8 is a modification of FIG. 1 and shows an example in which a check valve 29 is arranged in the pipe portion 28 between the nozzle valves 24 a and 24 b and the mist nozzle 10. The check valve 29 functions as an air replacement prevention valve that is closed when not in use so that air does not flow backward and is opened when a constant water pressure is applied. In this example, since the check valve 29 can prevent air from entering from the mist nozzle 10, the water accumulated in the pipe portion 28 is not contaminated by the air replacement, and as a result, the contaminated water is ejected. No sanitary effect is obtained. Further, in this example, the check valve 29 is housed in a valve box 56a (FIG. 4) built in the heating / drying machine main body 2, and the nozzle valves 24a and 24b are spaced apart from the check valve 29 to be in the mist box 56. Since it is arranged near the mist heat exchanger 11 side, the effect of improving the assemblability of the nozzle valves 24a and 24b made of electromagnetic valves can be obtained.

It is explanatory drawing of the piping structure of the bathroom heating dryer with a mist sauna function of one Embodiment of this invention. (A) is a graph explaining the warm air amount control mode same as the above, and (b) is a graph explaining the mist temperature control mode same as the above. It is a perspective view at the time of installing the bathroom heating dryer with a mist sauna function in the ceiling part of a bathroom same as the above. It is sectional drawing of the bathroom heating dryer with a mist sauna function same as the above. It is the perspective view which looked at the bathroom heating dryer with a mist sauna function same as the above from the lower part. It is a block diagram relevant to the control part same as the above. It is explanatory drawing of the heat-transfer plate of the heat exchanger for mist same as the above. It is explanatory drawing of other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bathroom heating dryer with mist sauna function 2 Heating dryer main body 3 Mist spraying device 4 Control part 5 Circulation fan 7 Heat exchanger for hot air 8 Control valve for hot air 9 Bathroom temperature sensor 10 Mist nozzle 11 Heat exchanger for mist 12 Control valve for mist 13 Bathroom

Claims (2)

A heating dryer body that supplies warm air into the bathroom, a mist spraying device that sprays hot water in a mist form, and a control unit that controls the bathroom to a predetermined temperature, the heating dryer body includes a circulation fan, A hot air heat exchanger that heats the wind from the circulation fan with hot water, a hot air control valve that adjusts the amount of hot water supplied to the hot air heat exchanger, and a bathroom temperature that detects the bathroom temperature near the ceiling The mist spraying device includes a mist nozzle that sprays hot water for a mist sauna, a heat exchanger for mist that heats water supplied to the mist nozzle, and hot water to the mist heat exchanger. A control valve for mist that adjusts the supply amount, and the control unit detects a temperature deviation of the bathroom temperature detected by the bathroom temperature sensor with respect to the target set temperature (= bathroom temperature detected by the bathroom temperature sensor−target set temperature). ) is below a predetermined level If again automatically running Yutakakazeryou control mode for controlling so as gradually stepped down air volume level of the circulating fan as the temperature difference increases, the temperature difference becomes larger when the temperature deviation is greater than a predetermined level mist sauna function bathroom heater dryer, characterized in that automatically executes mist temperature control mode be adjusted to go the opening of the mist control valve stepped down in accordance with.   The mist temperature control mode is characterized by monitoring the outlet temperature of the mist heat exchanger and controlling the opening degree of the mist control valve so as to gradually decrease the mist spray temperature. Bathroom heating dryer with mist sauna function.

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