JP2009293841A - Bathroom heating device with misting function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cool hot water flowing in a drain passage to a prescribed temperature or less without supplying a large amount of water from a bypass passage in a bathroom heating device with a misting function for supplying steam to a bathroom by spraying and evaporating hot water from a mist nozzle toward an evaporator, in which the water before heating, supplied to the mist nozzle, is partially guided to the drain passage for recovering the hot water dropping from the evaporator, through the bypass passage to cool the hot water flowing in the drain passage. <P>SOLUTION: A controller 5 detects a temperature of the water supplied to a mist water passage 33 by a misting water temperature sensor 33d (STEP 4) in a state that heating by a liquid-liquid heat exchanger 34 of the water flowing in the mist water passage 33 before start of an operation of a misting mechanism 3 is stopped, and makes a preset temperature variable on the basis of the detected water temperature so that the hot water flowing in a drain passage 35 has a prescribed temperature or lower during the operation of the misting mechanism 3 (STEP 5, 6, STEP 9, 10, STEP 11). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bathroom heating device with a mist function that sprays hot water toward an evaporator to evaporate it and supplies steam, steam, etc. to a bathroom or the like.

  Conventionally, a heat source unit having a heating heat exchanger, a heating radiator, a circulation fan that sucks air in the bathroom and blows the air heated by the heating radiator into the bathroom, and heat exchange for heating of the heat source unit A heating mechanism having a main heating medium circulation path for circulating the heating medium heated by the heater to the heating radiator, a subsidiary heating medium circulation path branched from the main heating medium circulation path of the heating mechanism, and a subsidiary heating medium circulation An evaporator installed in the channel, a mist nozzle that sprays water toward the evaporator, a mist water channel connected to the mist nozzle, and water sprayed from the mist nozzle is dropped without being evaporated by the evaporator There is known a bathroom heating device with a mist function that includes a mist mechanism having a drainage channel that collects and drains hot water to be used so that steam mist can be enjoyed in the bathroom (for example, see Patent Document 1).

  By the way, in the said bathroom heating apparatus with a mist function, the hot water which flows through a drainage channel is guide | induced to the bathroom drain pan etc. which were provided in the bathroom, and is discharged | emitted out of the bathroom. At this time, if the temperature of the hot water flowing through the drainage channel is too high, the temperature exceeds the heat-resistant temperature of the bathroom drain pan or the like, and the durability of the bathroom drain pan or the like may be reduced.

  Therefore, in the bathroom heating apparatus with a mist function of Patent Document 1, a bypass path connected from the mist channel to the drainage channel is provided, and cooling water is supplied to the hot water flowing through the drainage channel via the bypass channel, so Is prevented from exceeding a predetermined temperature.

  Here, as the mist mechanism, in addition to the above-described one, a liquid heat exchanger is interposed in the second auxiliary heat medium circulation path branched from the main heat medium circulation path, and the mist water channel is formed by the liquid heat exchanger. It is also known to improve the humidifying ability of the mist mechanism by heating the water flowing through the mist into hot water and spraying the hot water on the evaporator from the mist nozzle.

And it is possible to cool the hot water which flows through a drainage path by providing the bypass path of the said patent document 1 in the bathroom heating apparatus provided with this mist mechanism. However, in this mist mechanism, since the hot water heated by the liquid-liquid heat exchanger is sprayed from the mist nozzle to the evaporator, the temperature of the hot water flowing through the drainage channel is higher than that of Patent Document 1. For this reason, in order to make the hot water flowing through the drainage channel below a predetermined temperature, it is necessary to supply a large amount of water from the bypass channel to the drainage channel.
JP 2007-82905 A

  An object of this invention is to provide the bathroom heating apparatus with a mist function which can cool the hot water which flows through a drainage channel, without supplying a lot of water from a bypass channel in view of the above point.

  In order to achieve the above object, in the present invention, a heat source device having a heating heat exchanger, a heating radiator, and a circulation fan that sucks air in the bathroom and blows out the air heated by the heating radiator to the bathroom. And a heating mechanism having a main heating medium circulation path for circulating the heating medium heated by the heating heat exchanger of the heat source unit to the heating radiator, and a first branched from the main heating medium circulation path of the heating mechanism A secondary heat medium circulation path, an evaporator interposed in the first secondary heat medium circulation path, a mist nozzle spraying hot water toward the evaporator, a mist water path connected to the mist nozzle, and a main heat medium circulation A second sub-heat medium circulation path branched from the passage, a liquid heat exchanger interposed in the second sub-heat medium circulation path for heating water flowing through the mist water path, and the second sub-heat medium circulation path A flow control valve that controls the flow rate of the heat medium and a mistake that detects the temperature of hot water sprayed from the mist nozzle A water temperature sensor, a mist mechanism having a drainage channel for collecting and draining hot water dripping from the evaporator among hot water sprayed from the mist nozzle, and the temperature of the hot water detected by the water temperature sensor for mist are set to a predetermined value. A controller for controlling a flow rate control valve interposed in the second auxiliary heat medium circulation path so as to have a temperature, and a bypass path connected to the drainage path from the upstream side of the liquid heat exchanger of the mist channel, A bathroom heating apparatus with a mist function for guiding a part of the water supplied to the mist channel to the drainage channel via the bypass channel and cooling the hot water flowing through the drainage channel is improved as follows.

  That is, in the bathroom heating device with a mist function of the present invention, the controller uses the mist water temperature sensor to stop the heating by the liquid heat exchanger of the water flowing through the mist channel before starting the operation of the mist mechanism. The temperature of the water supplied to the mist mechanism is detected, and during the operation of the mist mechanism, based on the detected temperature of the water, the set temperature is varied so that the temperature of the hot water flowing through the drainage channel becomes a predetermined temperature or less. Features.

  According to the present invention, the temperature of the water supplied by the water temperature sensor for mist is detected before being heated by the liquid heat exchanger, and the temperature of the hot water flowing through the drainage channel is determined based on the detected temperature of the water. The set temperature is varied so as to be equal to or lower than the temperature. For example, when the temperature of the water supplied to the mist channel is low, the temperature of the cooling water supplied from the bypass channel to the drain channel is also low. Even when the temperature of the hot water flowing into the drainage channel is increased by heating to the set temperature, the temperature of the hot water flowing through the drainage channel can be set to a predetermined temperature or less by the cooling water supplied from the bypass channel.

  On the contrary, when the temperature of the water supplied to the mist channel is high, the temperature of the cooling water supplied from the bypass channel to the drain channel is also increased. In this case, by lowering the set temperature, the temperature of the hot water flowing into the drainage channel can also be lowered, and even a relatively high temperature cooling water can be lowered to a predetermined temperature or less without increasing the flow rate. it can.

  Therefore, according to the bathroom heating device with a mist function of the present invention, the hot water flowing through the drainage channel can be cooled to a predetermined temperature or less without supplying a large amount of cooling water from the bypass channel, and the cooling performance by the bypass channel can be improved. The amount of water used can be reduced without lowering.

  Here, it is considered that when the set temperature is lowered, the humidifying ability of the mist mechanism is lowered. However, as a result of experiments, it was found that even when the set temperature was lowered, the humidifying ability of the mist mechanism did not change so much. This is because when the set temperature is lowered, the temperature of the water supplied to the mist channel is high, and when the temperature of the supplied water is high, the outside air temperature is also high. This is because it is easy to evaporate even if the temperature is not so high.

  Therefore, according to the bathroom heating device with a mist function of the present invention, steam mist can be enjoyed in the bathroom without significantly reducing the humidifying ability of the mist mechanism.

  Embodiment of the bathroom heating apparatus with a mist function of this invention is described with reference to FIGS. Reference numeral 1 shown in FIGS. 1 and 2 is a bathroom heating device with a mist function, and includes a heating mechanism 2, a steam mist mechanism 3, and a heat source unit 4, as shown in FIG. The heat source device 4 includes a heating heat exchanger 4b heated by a burner 4a.

As shown in FIG. 1, the heating mechanism 2 is disposed in the ceiling BR ₁ of the bathroom BR, and has a suction port 21a and a blowout port 21b on the lower surface, and defines a ventilation path extending from the suction port 21a to the blowout port 21b. Ventilation case 21, circulation fan 22 that is arranged in ventilation case 21 and circulates the air in bathroom BR through the ventilation path in ventilation case 21, and a radiator for heating that is arranged in ventilation case 21 and heats the air 23. The air in the bathroom BR sucked into the ventilation case 21 from the suction port 21a by the circulation fan 22 is heated by the radiator 23 for heating, and is blown out from the blowout port 21b to the bathroom BR.

  As shown in FIG. 2, a main heat medium circulation path 24 connected to the heating heat exchanger 4 b of the heat source unit 4 is connected to the heating radiator 23. A heating medium valve 24a, a cistern 24b, and a circulation pump 24c are provided in the main heating medium circulation path 24. The heating medium (water, water, water) is opened by opening the heating medium valve 24a and operating the circulation pump 24c. Antifreeze etc.) circulates. The heat medium is heated by the heating heat exchanger 4b of the heat source unit 4 and supplied to the heating radiator 23. After being radiated by the heating radiator 23, the heat medium returns to the heating heat exchanger 4b of the heat source unit 4 again. Heated.

  The steam mist mechanism 3 includes a first sub heat medium circuit 25 branched from the main heat medium circuit 24, a heat valve 25 a and an evaporator 31 interposed in the first sub heat medium circuit 25, and an evaporator And a mist nozzle 32 for spraying hot water toward 31. The evaporator 31 and the mist nozzle 32 are disposed in the ventilation case 21 (see FIG. 1). A mist water channel 33 is connected to the mist nozzle 32. In the mist water channel 33, a filter 33a, a check valve 33b, a water supply valve 33c, a liquid heat exchanger 34, a mist water temperature sensor 33d, and a mist valve 33e are provided in this order from the upstream side.

  Tap water is supplied to the liquid heat exchanger 34 via the mist channel 33. The liquid heat exchanger 34 is connected to a second sub heat medium circuit 26 branched from the main heat medium circuit 24, and a flow rate control valve 26 a is interposed in the second sub heat medium circuit 26. ing. Thus, the heat medium heated by the heating heat exchanger 4b of the heat source unit 4 is supplied to the liquid heat exchanger 34 by opening the flow rate control valve 26a, and the water flowing in the mist channel 33 is liquid heat exchanger 34. Then, it is heated by the heat of the heat medium and becomes hot water and sprayed from the mist nozzle 32. Further, the temperature of the hot water supplied to the mist nozzle 32 is changed by changing the flow rate of the heat medium flowing through the liquid heat exchanger 34 by the flow rate control valve 26a.

  The evaporator 31 is supplied with the heat medium heated by the heating heat exchanger 4b of the heat source unit 4 by opening the heat operating valve 25a, and evaporates the hot water sprayed from the mist nozzle 32. Of the hot water sprayed from the mist nozzle 32, hot water that does not evaporate and drops from the evaporator 31 is collected in the drainage channel 35 via the mist drain pan 35a and is provided in the bathroom BR. It drains out of the bathroom through etc.

  A bypass path 36 extending from the upstream side of the liquid heat exchanger 34 in the mist water path 33 is connected to the drain path 35. By the bypass path 36, the tap water before being heated by the liquid heat exchanger 34 is supplied to the drain path 35, and the hot water flowing through the drain path 35 is cooled.

  The bathroom heating device 1 with a mist function includes a controller 5 as shown in FIG. The controller 5 controls the operation of the heating mechanism 2 and the steam mist mechanism 3. The controller 5 is communicably connected to a bathroom remote controller (not shown) and a controller (not shown) of the heat source unit 4.

  When the heating switch of the bathroom remote controller is turned on, the controller 5 sends a heating command for burning the heating burner 4a and operating the circulation pump 24c to the heat source unit 4, and opens the heating medium valve 24a. Then, the heating medium heated by the heating heat exchanger 4b is circulated to the heating radiator 23 via the main heating medium circulation path 24, and the circulation fan 22 is further operated to blow hot air to the bathroom BR. Perform heating operation control.

  Then, when the heating switch is turned off, the controller 5 sends a command to stop the combustion of the heating burner 4a and stop the operation of the circulation pump 24c to the heat source unit 4, and closes the heating medium valve 24a. The heating operation is finished.

  Next, the operation of the controller 5 when the mist switch of the bathroom remote controller is turned on will be described. Here, the flow rate of the bypass path 36 of the embodiment is regulated to 0.15 L / min, and the controller 5 uses the second auxiliary heat medium so that the temperature of the hot water detected by the water temperature sensor 33d for mist becomes the set temperature. The opening degree of the flow control valve 26a of the circulation path 26 is controlled. In addition, the controller 5 supplies water to the mist channel 33 by the mist water temperature sensor 33d in a state where heating by the liquid-liquid heat exchanger 34 of the water flowing through the mist channel 33 is stopped before the mist operation is started. Detect water temperature. During the mist operation, the set temperature is varied based on the detected water temperature so that the temperature of the hot water flowing through the drainage channel 35 is 45 ° C. (predetermined temperature) or less.

  In the bathroom heating device 1 with a mist function of the embodiment, when the water temperature is less than 20 ° C, the water temperature is 20 ° C or more and less than 25 ° C, and the water temperature is 25 ° C or more. As a result of experimentally determining the set temperature at which the drainage temperature is equal to or lower than the predetermined temperature, the set temperature when the water temperature is less than 20 ° C. is set to 70 ° C. The set temperature in the case of 55 ° C. and 25 ° C. or higher is set to 25 ° C.

  Hereinafter, the operation of the controller when performing the mist operation will be described in detail with reference to FIG. When the mist switch of the bathroom remote controller is turned on, the controller 5 checks in STEP 1 whether or not two hours have passed since the previous mist operation.

  When two hours have passed in STEP1, the process proceeds to STEP2, and the water supply valve 33c and the mist valve 33e are opened. Then, the process proceeds to STEP 3 to check whether or not 10 seconds have elapsed since the water supply valve 33c and the mist valve 33e were opened. When 10 seconds have elapsed, the process proceeds to STEP 4 where the temperature of the water supplied to the mist channel 33 is detected by the mist water temperature sensor 33d.

  And it progresses to STEP5 and it is checked whether the temperature of the detected water is less than 20 degree | times. When it is less than 20 degrees, the process proceeds to STEP 6, the set temperature is set to 70 ° C., the process proceeds to STEP 7, the heating operation control described above is performed, and the thermal valve 25a of the first auxiliary heat medium circuit is opened, The opening degree of the flow control valve 26a is controlled so that the temperature of hot water detected by the water temperature sensor 33d for mist becomes a set temperature (70 ° C. in this case). The tap water supplied to the mist channel 33 is heated by the liquid heat exchanger 34 to become hot water, sprayed from the mist nozzle 32 toward the evaporator 31 and evaporated. The evaporated water vapor or steam is blown into the bathroom BR together with warm air from the blowout port 21b by the circulation fan 22, and steam mist can be enjoyed in the bathroom BR.

  Of the hot water sprayed from the mist nozzle 32, the hot water dropped without evaporating is collected by the drain pan 35a for mist, collected by the drainage channel 35, and cooled by tap water supplied through the bypass channel 36, It is discharged out of the bathroom via a bathroom drain pan, etc., not shown in the figure provided in the bathroom BR.

  When the set temperature is 70 ° C., the temperature of the hot water collected in the drainage channel 35 is also high, but since the temperature of tap water supplied through the bypass channel 36 is as low as less than 20 degrees, The temperature of the discharged hot water is 45 ° C. or lower.

  And it progresses to STEP8 and it is checked whether mist operation stop operation was performed with the bathroom remote control. When the mist operation stop operation is performed, the heating operation control is finished, and the thermal operation valve 25a and the flow rate control valve 26a are closed, and the process is finished.

  In STEP5, when the temperature of the detected water is 20 ° C. or more, the process branches to STEP9, and it is checked whether or not the temperature of the water detected in STEP4 is less than 25 ° C. If it is less than 25 degrees, proceed to STEP 10, set the set temperature to 55 ° C., proceed to STEP 7, perform the heating operation control described above, and open the thermal valve 25a of the first auxiliary heat medium circuit, The opening degree of the flow control valve 26a of the second auxiliary heat medium circulation path 26 is controlled so that the temperature of the hot water detected by the water temperature sensor 33d for mist becomes a set temperature (here 55 ° C.). And it progresses to STEP8 and it is checked whether operation stop operation was performed, and when operation stop operation is performed, the thermal operation valve 25a and the flow control valve 26a are closed, and a process is complete | finished.

  When the temperature of the water detected in STEP 9 is 25 degrees or more, the process branches to STEP 11, the set temperature is set to 25 ° C., the process proceeds to STEP 7, and the heating operation control described above is performed, and the first auxiliary heat medium circulation is performed. The flow control valve 26a of the second auxiliary heat medium circulation path 26 is set so that the thermal valve 25a of the path is opened and the temperature of the hot water detected by the water temperature sensor 33d for mist becomes a set temperature (here, 25 ° C.). To control the opening degree. At this time, since the temperature of the water supplied to the mist water channel 33 is equal to or higher than the set temperature (25 ° C.), the flow rate control valve 26a is closed, and the tap water is not heated by the liquid heat exchanger 34 and is used as it is. Spray from 32.

  And it progresses to STEP8 and it is checked whether operation stop operation was performed, and when operation stop operation is performed, while heating operation control is complete | finished, the thermal valve 25a is closed and a process is complete | finished. To do.

  In addition, when two hours or more have not passed in STEP 1, it is considered that the temperature of the tap water supplied to the mist channel 33 has not changed. Therefore, the flow branches to STEP 12 to set the same temperature as the previous time, and to STEP 7. The second operation is performed so that the heating operation control described above is performed, the thermal valve 25a of the first auxiliary heat medium circulation path is opened, and the temperature of hot water detected by the water temperature sensor 33d for mist becomes the set temperature. The opening degree of the flow control valve 26a of the auxiliary heat medium circulation path 26 is controlled.

  According to the bathroom heating device 1 with the mist function of the embodiment, even if the temperature of the cooling water supplied from the bypass passage 36 is high, the temperature of the hot water recovered in the drainage passage 35 is lowered by lowering the set temperature. Therefore, the hot water flowing through the drainage channel 35 can be cooled to 45 ° C. or less without supplying a large amount of cooling water from the bypass channel 36, and the amount of water used can be reduced without degrading the cooling performance. it can.

  Here, it is considered that when the set temperature is lowered, the humidifying ability of the steam mist mechanism 3 is lowered. However, as a result of experiments, it was found that the humidifying ability of the steam mist mechanism 3 does not change so much even when the set temperature is lowered. This is a case where the temperature of the tap water supplied to the mist water channel 33 is high when the set temperature is lowered, and since the outside air temperature is high when the temperature of the tap water is high, the water is sprayed from the mist nozzle 32. This is because it is easy to evaporate even if the temperature of the hot water is not so high.

  Therefore, according to the bathroom heating device 1 with the mist function of the embodiment, the steam mist can be enjoyed in the bathroom BR without significantly reducing the humidifying ability of the steam mist mechanism 3.

  In addition, in embodiment, when the temperature of tap water is less than 20 degreeC, when it is 20 degreeC or more and less than 25 degreeC, it divides into three when it is 25 degreeC or more, and the hot water which flows through the drainage channel 35 in each case However, the present invention can be similarly applied to a case where the temperature is divided into two or four or more.

  Moreover, although predetermined temperature was 45 degreeC in embodiment, it is not restricted to this, You may change suitably according to the heat-resistant temperature etc. of the drain pan for bathrooms.

Explanatory drawing which shows embodiment of the bathroom heating apparatus with a mist function of this invention. Explanatory drawing which shows the bathroom heating apparatus with a mist function of embodiment. The flowchart which shows the process of the controller of embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bathroom heating apparatus with a mist function, 2 ... Heating mechanism, 23 ... Heating radiator, 24 ... Main heating medium circulation path, 25 ... First auxiliary heating medium circulation path, 26 ... Second auxiliary heating medium circulation path, 26a ... Flow control valve, 3 ... Steam mist mechanism, 31 ... Evaporator, 32 ... Mist nozzle, 33 ... Mist water channel, 33d ... Water temperature sensor for mist, 34 ... Liquid heat exchanger, 35 ... Drain channel, 36 ... Bypass channel 4 ... Heat source machine, 4b ... Heat exchanger for heating, 5 ... Controller, BR ... Bathroom.

Claims (1)

A heat source machine having a heat exchanger for heating;
Heating radiator, circulation fan that sucks the air in the bathroom and blows the air heated by the heating radiator to the bathroom, and heat medium heated by the heat exchanger for heating of the heat source machine to the heating radiator A heating mechanism having a main heat medium circulation path to circulate;
A first sub-heat medium circuit branched from the main heat-medium circuit of the heating mechanism, an evaporator interposed in the first sub-heat medium circuit, a mist nozzle that sprays hot water toward the evaporator, Mist water channel connected to the mist nozzle, a second sub heat medium circuit branched from the main heat medium circuit, and liquid heat that heats water flowing through the mist water channel interposed in the second sub heat medium circuit The exchanger, the flow rate control valve for controlling the flow rate of the heat medium circulating in the second auxiliary heat medium circuit, the water temperature sensor for mist for detecting the temperature of hot water sprayed from the mist nozzle, and sprayed from the mist nozzle A mist mechanism having a drainage channel for collecting and draining hot water dripping from the evaporator of hot water;
A controller for controlling a flow rate control valve interposed in the second auxiliary heat medium circuit so that the temperature of hot water detected by the water temperature sensor for mist becomes a predetermined set temperature;
A bypass channel connected to the drainage channel from the upstream side of the liquid heat exchanger of the mist channel,
In a bathroom heating device with a mist function that leads part of the water supplied to the mist channel to the drainage channel via the bypass channel and cools the hot water flowing through the drainage channel,
The controller detects the temperature of the water supplied to the mist channel by the water temperature sensor for mist while the heating by the liquid heat exchanger of the water flowing through the mist channel is stopped before the operation of the mist mechanism is started. The bathroom heating device with a mist function is characterized in that the set temperature is varied so that the temperature of the hot water flowing through the drainage channel is equal to or lower than a predetermined temperature based on the detected water temperature during the operation.