JP2017194240A - Bathroom air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique which eliminates ineffectual waste of heat of a heat medium due to heat radiation from a liquid-liquid heat exchanger.SOLUTION: A controller carries out, in the following sequence, a process in which a first heat medium valve 31 is put into an open state at a start of a mist operation, while a second heat medium valve 32 and a mist valve 51 are in a closed state, a process in which the second heat medium valve 32 is put into an open state when a temperature of a heat medium detected by a heat medium temperature sensor 7 reaches a predetermined reference heat medium temperature Ta, and a process in which the mist valve 51 is put into an open state.SELECTED DRAWING: Figure 2

Description

  The technology disclosed in this specification relates to a bathroom air conditioner.

  The bathroom air conditioner disclosed in Patent Document 1 includes a gas-liquid heat exchanger, a liquid-liquid heat exchanger connected in parallel to the gas-liquid heat exchanger, and a first that sends a heat medium to the gas-liquid heat exchanger. Water is sent to the heat medium forward path, the second heat medium forward path that branches from the first heat medium forward path and flows through the first heat medium forward path to the liquid-liquid heat exchanger, and water to the liquid-liquid heat exchanger A first water channel is provided. In addition, the bathroom air conditioner includes a mist nozzle and a second water supply channel that sends water from the liquid-liquid heat exchanger to the mist nozzle. The bathroom air conditioner detects the temperature of the first heat medium valve that opens and closes the first heat medium forward path, the second heat medium valve that opens and closes the second heat medium forward path, and the temperature of the heat medium flowing through the first heat medium forward path. A heating medium temperature sensor, a mist valve that opens and closes the second water supply channel, a bathroom temperature sensor that detects the temperature in the bathroom, and a control means. This bathroom air conditioner can perform mist operation. In the mist operation, the gas-liquid heat exchanger heats the air sent into the bathroom by the heat medium sent to the gas-liquid heat exchanger through the first heat medium forward path. Moreover, a liquid-liquid heat exchanger heats the water sent to the liquid-liquid heat exchanger by the 1st water supply path with the heat medium sent to the liquid-liquid heat exchanger by the 2nd heat-medium forward path. Also, the mist nozzle sprays the water sent from the liquid-liquid heat exchanger to the mist nozzle through the second water supply channel into the bathroom in the form of mist.

  In the bathroom air conditioner of Patent Document 1, the control means opens the first heat medium valve and the second heat medium valve while keeping the mist valve closed at the start of the mist operation. When the first heat medium valve is opened, the heat medium flows through the first heat medium forward path and is sent to the gas-liquid heat exchanger. When the second heat medium valve is opened, the heat medium flows through the second heat medium forward path and is sent to the liquid-liquid heat exchanger.

  The control means then opens the mist valve when the temperature in the bathroom detected by the bathroom temperature sensor reaches a predetermined reference bathroom temperature. When the mist valve is opened, water is sent from the liquid-liquid heat exchanger to the mist nozzle, and mist-like water is sprayed from the mist nozzle into the bathroom.

  In the bathroom air conditioner of Patent Document 1, both the first heat medium valve and the second heat medium valve are opened at the start of the mist operation, and the heat medium is present in both the gas-liquid heat exchanger and the liquid-liquid heat exchanger. Sent. In the gas-liquid heat exchanger, air is heated by the heat medium, and in the liquid-liquid heat exchanger, water is heated by the heat medium. Therefore, in the bathroom air conditioner of Patent Document 1, both air and water are heated by the heat medium immediately after the start of the mist operation.

JP 2006-071143 A

  In the bathroom air conditioner of Patent Document 1, the heat medium is sent to both the gas-liquid heat exchanger and the liquid-liquid heat exchanger at the start of the mist operation, and both air and water are simultaneously applied by the heat medium immediately after the start of the mist operation. Heated. Therefore, the heat of the heat medium is wasted in the liquid-liquid heat exchanger. In other words, in a bathroom air conditioner capable of performing mist operation, it is not necessary to heat water with a liquid-liquid heat exchanger immediately after the start of mist operation, and liquid and liquid after the stage of spraying mist-like water into the bathroom. What is necessary is just to heat water with a heat exchanger. Therefore, when water is heated by the liquid-liquid heat exchanger in the previous stage, the heat of the heat medium is wasted in the liquid-liquid heat exchanger.

  Therefore, the present specification provides a technique that does not waste the heat of the heat medium due to heat radiation from the liquid-liquid heat exchanger.

  The bathroom air conditioner disclosed in this specification includes a gas-liquid heat exchanger, a liquid-liquid heat exchanger connected in parallel to the gas-liquid heat exchanger, and a first heat medium that sends a heat medium to the gas-liquid heat exchanger. A forward liquid, a first heat medium return path that returns the heat medium from the gas-liquid heat exchanger, and a part of the heat medium that branches off from the first heat medium forward path and flows through the first heat medium forward path The second heat medium forward path to be sent to the first heat medium and the first heat medium return path are joined together, the second heat medium return path to return the heat medium from the liquid-liquid heat exchanger, and the first feed to send water to the liquid-liquid heat exchanger Has a waterway. In addition, the bathroom air conditioner includes a mist nozzle and a second water supply channel that sends water from the liquid-liquid heat exchanger to the mist nozzle. The bathroom air conditioner includes a first heat medium valve that opens and closes the first heat medium forward path or the first heat medium return path, a second heat medium valve that opens and closes the second heat medium forward path or the second heat medium return path, A heat medium temperature sensor for detecting the temperature of the heat medium flowing through one heat medium forward path, a mist valve for opening and closing the first water supply path or the second water supply path, a bathroom temperature sensor for detecting the temperature in the bathroom, and a control means. I have. This bathroom air conditioner can perform mist operation. In the mist operation, the gas-liquid heat exchanger heats the air sent into the bathroom by the heat medium sent to the gas-liquid heat exchanger by the first heat medium forward path, and the liquid-liquid heat exchanger passes by the first water path. The water sent to the liquid-liquid heat exchanger is heated by the heat medium sent to the liquid-liquid heat exchanger by the second heat medium forward path, and the mist nozzle is discharged from the liquid-liquid heat exchanger by the second water path. The water sent to is made into a mist and sprayed in the bathroom. The control means includes a process of opening the first heat medium valve while the second heat medium valve and the mist valve are closed at the start of the mist operation, and the temperature of the heat medium detected by the heat medium temperature sensor is predetermined. When the reference heat medium temperature is reached, the process for opening the second heat medium valve and the process for opening the mist valve are performed in this order.

  According to such a configuration, at the start of the mist operation, the second heat medium valve is in a closed state, so the heat medium in the second heat medium forward path does not flow. Therefore, no heat medium is sent to the liquid-liquid heat exchanger at the start of the mist operation. When the control means opens the first heat medium valve in this state, the heat medium in the first heat medium forward path flows and the heat medium is sent to the gas-liquid heat exchanger. Thus, according to said structure, a heat medium can be sent to a gas-liquid heat exchanger in the state in which a heat medium is not sent to a liquid-liquid heat exchanger. Therefore, at the start of the mist operation, the heat medium can be concentrated and sent to the gas-liquid heat exchanger without being sent to the liquid-liquid heat exchanger, and waste of heat due to heat radiation from the heat medium in the liquid-liquid heat exchanger is wasted. Consumption can be prevented. In this case, there is heat dissipation from the heat medium in the gas-liquid heat exchanger, but since heat dissipation in the gas-liquid heat exchanger is used for subsequent heating in the bathroom, heat is wasted. There is no end to it. Thereafter, the control means opens the second heat medium valve when the temperature of the heat medium detected by the heat medium temperature sensor reaches a predetermined reference heat medium temperature, and then opens the mist valve. Thereby, after the temperature of the heat medium becomes high, the heat medium can be sent to the liquid-liquid heat exchanger, and the water sent to the mist nozzle can be heated by the heat medium.

  As described above, according to the above configuration, the heat medium is first sent only to the gas-liquid heat exchanger, and then the heat medium is sent to the liquid-liquid heat exchanger. The heat of the heating medium is not wasted.

  The bathroom air conditioner may further include a circulation fan that circulates air between the gas-liquid heat exchanger and the bathroom. In addition, the control means performs a process of opening the first heat medium valve while the circulation fan is stopped at the start of the mist operation, and the temperature of the heat medium detected by the heat medium temperature sensor becomes a predetermined reference heat medium temperature. When reaching, the process of driving the circulation fan may be executed in this order.

  According to such a configuration, since the circulation fan is stopped at the start of the mist operation, air does not circulate between the inside of the bathroom and the gas-liquid heat exchanger before the heat medium becomes high temperature. Therefore, low-temperature air that is not heated so much by the gas-liquid heat exchanger is not sent into the bathroom. Thereafter, the circulation fan is driven when the temperature of the heat medium detected by the heat medium temperature sensor reaches the reference heat medium temperature. Thereby, air heated by a high-temperature heat medium can be sent into the bathroom, and warm air can be sent into the bathroom.

  In the bathroom air conditioner described above, the control means performs the first operation when the temperature in the bathroom detected by the bathroom temperature sensor after the process of driving the circulation fan reaches the predetermined first reference bathroom temperature in the mist operation. You may be comprised so that the process which makes 2 heat-medium valve open may be performed.

  According to such a configuration, the heating medium can be sent to the liquid-liquid heat exchanger after the temperature in the bathroom detected by the bathroom temperature sensor reaches the first reference bathroom temperature. Therefore, the heating medium can be concentrated and sent only to the gas-liquid heat exchanger without sending the heating medium to the liquid-liquid heat exchanger until the temperature in the bathroom becomes high. Thereby, the air sent into the bathroom can be preferentially heated by the gas-liquid heat exchanger until the temperature in the bathroom becomes high. Thereafter, after the air in the bathroom is warmed, the heat medium can be sent to the liquid-liquid heat exchanger. And the water for sending to a mist nozzle in a liquid-liquid heat exchanger is heated with a heat medium. As described above, first, the air sent into the bathroom is preferentially heated by the gas-liquid heat exchanger, so that the rate of temperature rise in the bathroom can be increased.

  In the bathroom air conditioner described above, the control means performs a process of driving the circulation fan in the mist operation, and the temperature in the bathroom detected by the bathroom temperature sensor is higher than the first reference bathroom temperature. It may be configured to execute a process of opening the mist valve when the 2 standard bathroom temperature is reached.

  According to such a configuration, water can be sent from the liquid-liquid heat exchanger to the mist nozzle after the temperature in the bathroom detected by the bathroom temperature sensor reaches the second reference bathroom temperature. Therefore, mist-like water can be sprayed in the bathroom after the temperature in the bathroom becomes high.

  In the bathroom air conditioner described above, the control means performs a process of opening the mist valve when a predetermined time has elapsed after performing the process of opening the second heat medium valve in the mist operation. It may be configured.

  According to such a configuration, even if the temperature in the bathroom detected by the bathroom temperature sensor cannot be used for control by the controller, the temperature in the bathroom increases after the second heat medium valve is opened. Time to do. And after the temperature in a bathroom becomes high, water can be sent to a mist nozzle from a liquid-liquid heat exchanger. Therefore, mist-like water can be sprayed in the bathroom after the temperature in the bathroom becomes high.

It is a figure which shows schematic structure of the bathroom air conditioner and gas heat source machine of an Example. It is a flowchart which shows the process of 1st Example which a controller performs. It is a timing chart of the process of 1st Example. It is a flowchart which shows the process of the other Example which a controller performs. It is a flowchart which shows the process of 2nd Example which a controller performs. It is a timing chart of the process of 2nd Example. It is a timing chart of the process of a prior art.

  As shown in FIG. 1, the bathroom air conditioner 1 according to the embodiment is used by being connected to a gas heat source device 100. First, the configuration of the gas heat source device 100 will be described. The gas heat source device 100 includes a cistern 101, a gas burner 102, and a heat exchanger 103. The gas heat source apparatus 100 includes a heating heat medium path 104, a feeding heat medium path 105, a return heat medium path 106, and a pump 107.

  The cistern 101 stores a heat medium therein. As the heat medium, for example, water or antifreeze can be used. The gas burner 102 burns gas to heat the heat exchanger 103. The heat exchanger 103 heats the heat medium by heat exchange between the combustion gas and the heat medium. Heat exchange is performed in the process in which the heat medium flows through the heat exchanger 103.

  One end of the heating heat medium path 104 is connected to the cistern 101. The other end of the heating heat medium path 104 is connected to the heat exchanger 103. The heating heat medium path 104 sends the heat medium from the cistern 101 to the heat exchanger 103.

  One end of the feed heat medium path 105 is connected to the heat exchanger 103. The other end of the feed heat medium path 105 is connected to a first heat medium forward path 21a of the bathroom air conditioner 1 described later. The feed heat medium path 105 sends the heat medium from the heat exchanger 103 to the first heat medium forward path 21 a of the bathroom air conditioner 1.

  One end of the return heat medium path 106 is connected to a first heat medium return path 21b of the bathroom air conditioner 1 described later. The other end of the return heat medium path 106 is connected to the cistern 101. The return heat medium path 106 sends the heat medium from the first heat medium return path 21 b of the bathroom air conditioner 1 to the cistern 101.

  The pump 107 is provided in the heating heat medium path 104. The pump 107 extrudes the heat medium in the heating heat medium path 104 with pressure, and circulates the heat medium in the heating heat medium path 104, the feed heat medium path 105, and the return heat medium path 106.

  Next, the configuration of the bathroom air conditioner 1 will be described. The bathroom air conditioner 1 is a device that performs air conditioning in the bathroom 5. For example, the bathroom air conditioner 1 performs heating and drying in the bathroom 5. The bathroom air conditioner 1 can execute a mist operation in which mist-like water is sprayed into the bathroom 5.

  The bathroom air conditioner 1 includes a first heat medium path 21, a heat medium temperature sensor 7, and a gas-liquid heat exchanger 2. The bathroom air conditioner 1 includes a circulation fan 4, a ventilation fan 9, and a bathroom temperature sensor 8.

  The first heat medium path 21 includes a first heat medium forward path 21a and a first heat medium return path 21b. One end of the first heat medium forward path 21 a is connected to the feed heat medium path 105 of the gas heat source device 100. The other end of the first heat medium forward path 21 a is connected to the gas-liquid heat exchanger 2. The first heat medium forward path 21 a sends the heat medium from the heat medium path 105 of the gas heat source device 100 to the gas-liquid heat exchanger 2.

  One end of the first heat medium return path 21 b is connected to the gas-liquid heat exchanger 2. The other end of the first heat medium return path 21 b is connected to the return heat medium path 106 of the gas heat source device 100. The first heat medium return path 21 b sends the heat medium from the gas-liquid heat exchanger 2 to the return heat medium path 106 of the gas heat source apparatus 100.

  A first heat medium valve 31 is provided in the first heat medium forward path 21a. The first heat medium valve 31 is a heat operated valve. The first heat medium valve 31 opens and closes the first heat medium forward path 21a. When the first heat medium valve 31 is opened, the heat medium is sent from the gas heat source device 100 to the gas-liquid heat exchanger 2 through the first heat medium forward path 21a, and the first heat medium is transmitted from the gas-liquid heat exchanger 2 to the first heat medium. The heat medium is returned to the gas heat source device 100 via the return path 21b. When the first heat medium valve 31 is closed, the gas heat source device 100 is sent to the gas-liquid heat exchanger 2 via the first heat medium forward path 21a, and the gas-liquid heat exchanger 2 passes through the first heat medium return path 21b. The flow of the heat medium that is returned to the gas heat source device 100 via the flow stops.

  The heat medium temperature sensor 7 is provided in the first heat medium forward path 21a. The heat medium temperature sensor 7 detects the temperature of the heat medium flowing through the first heat medium forward path 21a. The heat medium temperature sensor 7 detects the temperature of the heat medium that has been heated by the gas heat source device 100 and has not been heat exchanged by the gas-liquid heat exchanger 2. As the heat medium temperature sensor 7, a thermistor whose resistance value changes with temperature change can be used.

  The gas-liquid heat exchanger 2 is, for example, a hot water coil. The gas-liquid heat exchanger 2 heats air by heat exchange between a heat medium and air. The gas-liquid heat exchanger 2 heats the air sent into the bathroom 5 by the heat of the heat medium heated by the gas heat source device 100 and sent to the gas-liquid heat exchanger 2. Heat exchange is performed in the process in which the heat medium flows through the gas-liquid heat exchanger 2.

  The circulation fan 4 is disposed adjacent to the gas-liquid heat exchanger 2. Circulation fan 4 is driven by motor 4a. The circulation fan 4 blows air by rotating. The circulation fan 4 sends the air in the bathroom 5 to the gas-liquid heat exchanger 2 and sends the air heated by the gas-liquid heat exchanger 2 into the bathroom 5. That is, the circulation fan 4 circulates air between the gas-liquid heat exchanger 2 and the bathroom 5. A variable louver 87 is arranged in the middle of the path from the circulation fan 4 to the bathroom 5. The variable louver 87 can change the air direction of the air blown into the bathroom 5 by the circulation fan 4. The variable louver 87 is driven by a motor 87a.

  The ventilation fan 9 is driven by a motor 9a. The ventilation fan 9 ventilates the air in the bathroom 5 by rotating. The ventilation fan 9 exhausts the moist air in the bathroom 5 to the outside of the bathroom 5.

  The bathroom temperature sensor 8 is disposed adjacent to the gas-liquid heat exchanger 2. The bathroom temperature sensor 8 is provided at a position facing the bathroom 5. The bathroom temperature sensor 8 detects the temperature in the bathroom 5. More specifically, the bathroom temperature sensor 8 detects the temperature of the air when the circulation fan 4 sends the air in the bathroom 5 to the gas-liquid heat exchanger 2. As the bathroom temperature sensor 8, a thermistor whose resistance value changes according to a temperature change can be used.

  The bathroom air conditioner 1 includes a second heat medium path 22 and a liquid-liquid heat exchanger 3. Furthermore, the bathroom air conditioner 1 includes a first water supply channel 41, a second water supply channel 42, a mist nozzle 6, and a controller 90 (an example of control means).

  The second heat medium path 22 includes a second heat medium forward path 22a and a second heat medium return path 22b. One end of the second heat medium forward path 22a is connected to the upstream side of the first heat medium valve 31 and the heat medium temperature sensor 7 of the first heat medium forward path 21a. The second heat medium forward path 22a is branched from the first heat medium forward path 21a. A part of the heat medium flowing through the first heat medium forward path 21a flows to the second heat medium forward path 22a. The other end of the second heat medium forward path 22 a is connected to the liquid-liquid heat exchanger 3. The second heat medium forward path 22 a sends the heat medium from the first heat medium forward path 21 a to the liquid-liquid heat exchanger 3.

  One end of the second heat medium return path 22 b is connected to the liquid-liquid heat exchanger 3. The other end of the second heat medium return path 22b is connected to the first heat medium return path 21b. The second heat medium return path 22b merges with the first heat medium return path 21b. The second heat medium return path 22b sends the heat medium from the liquid-liquid heat exchanger 3 to the first heat medium return path 21b. The heat medium flowing through the second heat medium return path 22b joins the heat medium flowing through the first heat medium return path 21b.

  A second heat medium valve 32 is provided in the second heat medium return path 22b. The second heat medium valve 32 is a flow control valve. The second heat medium valve 32 opens and closes the second heat medium return path 22b. When the second heat medium valve 32 is opened, the heat medium is sent from the first heat medium forward path 21a to the liquid-liquid heat exchanger 3 via the second heat medium forward path 22a, and the second liquid medium heat exchanger 3 then The heat medium is returned to the first heat medium return path 21b via the heat medium return path 22b. When the second heat medium valve 32 is closed, the first heat medium forward path 21a is sent to the liquid-liquid heat exchanger 3 via the second heat medium forward path 22a, and the liquid-liquid heat exchanger 3 sends the second heat medium return path. The flow of the heat medium returned to the first heat medium return path 21b via 22b stops.

  The liquid-liquid heat exchanger 3 is, for example, a plate type heat exchanger. The liquid-liquid heat exchanger 3 heats low-temperature water by heat exchange between a high-temperature heat medium and low-temperature water. The liquid-liquid heat exchanger 3 is connected in parallel to the gas-liquid heat exchanger 2. A part of the heat medium sent to the gas-liquid heat exchanger 2 by the first heat medium forward path 21a is sent to the liquid-liquid heat exchanger 3 by the second heat medium forward path 22a. The heat medium after heat exchange in the liquid-liquid heat exchanger 3 is sent to the first heat medium return path 21b through the second heat medium return path 22b. The liquid-liquid heat exchanger 3 heats the water sent to the mist nozzle 6 by the heat of the heat medium heated by the gas heat source device 100 and sent to the liquid-liquid heat exchanger 3. Heat exchange is performed in the process in which the heat medium flows through the liquid-liquid heat exchanger 3.

  One end of the first water channel 41 is connected to a tap water supply source (not shown), and the tap water is supplied to the first water channel 41. The other end of the first water supply passage 41 is connected to the liquid-liquid heat exchanger 3. The first water passage 41 sends tap water to the liquid-liquid heat exchanger 3.

  A check valve 53 and a water supply valve 52 are provided in the first water supply passage 41. The check valve 53 prevents the backflow of water flowing through the first water supply path 41. The water supply valve 52 is an electromagnetic valve. The water supply valve 52 opens and closes the first water supply path 41. When the water supply valve 52 is opened, water flows through the first water supply path 41. When the water supply valve 52 is opened, water is sent to the liquid-liquid heat exchanger 3 through the first water supply passage 41. When the water supply valve 52 is closed, the flow of water in the first water supply passage 41 stops.

  In addition, a bypass 43 is connected to the first water supply channel 41. One end of the detour path 43 is connected to the first water supply path 41 on the upstream side of the water supply valve 52. The other end of the bypass 43 is connected to the first water supply path 41 on the downstream side of the water supply valve 52. The bypass 43 sends water from the first water supply path 41 upstream of the water supply valve 52 to the first water supply path 41 downstream of the water supply valve 52.

  The bypass circuit 43 is provided with a first overpressure relief valve 55. The first overpressure relief valve 55 opens and closes the bypass circuit 43. When the first overpressure relief valve 55 is opened, water flows into the bypass 43. When the first overpressure relief valve 55 is closed, the flow of water in the bypass 43 stops. The first overpressure relief valve 55 is opened when the water pressure between the water supply valve 52 and the check valve 53 becomes excessively high. When the 1st overpressure relief valve 55 will be in an open state, the water pressure in the 1st water supply path 41 will fall.

  One end of the second water supply path 42 is connected to the liquid-liquid heat exchanger 3. The other end of the second water supply path 42 is connected to the mist nozzle 6. The second water passage 42 sends water from the liquid-liquid heat exchanger 3 to the mist nozzle 6. A mist temperature sensor 81 is provided in the second water supply path 42. The mist temperature sensor 81 detects the temperature of the water flowing through the second water supply path 42. The mist temperature sensor 81 detects the temperature of water after heat exchange is performed in the liquid-liquid heat exchanger 3. As the mist temperature sensor 81, a thermistor whose resistance value changes with temperature changes can be used.

  A mist valve 51 is provided in the second water supply passage 42. The mist valve 51 is a solenoid valve. The mist valve 51 opens and closes the second water supply path 42. When the mist valve 51 is opened, water flows through the second water supply passage 42. When the mist valve 51 is opened, water is sent from the liquid-liquid heat exchanger 3 to the mist nozzle 6. When the mist valve 51 is closed, the flow of water in the second water supply passage 42 stops.

  A water discharge channel 44 is connected to the second water supply channel 42. One end of the water discharge channel 44 is connected to the second water supply channel 42 upstream of the mist valve 51. The other end of the water discharge channel 44 is open. The water discharge channel 44 discharges a part of the water flowing through the second water supply channel 42 to the outside.

  A second overpressure relief valve 56 is provided in the water discharge passage 44. The second overpressure relief valve 56 opens and closes the water discharge passage 44. When the second overpressure relief valve 56 is in the open state, water flows into the water discharge passage 44 and water is discharged. When the second overpressure relief valve 56 is in a closed state, water does not flow into the water discharge passage 44 and water is not released. The second overpressure relief valve 56 is opened when the water pressure between the mist valve 51 and the liquid-liquid heat exchanger 3 becomes excessively high. When the second overpressure relief valve 56 is opened, the water pressure in the second water supply passage 42 decreases.

  The mist nozzle 6 sprays the water sent to the mist nozzle 6 through the second water supply passage 42 in the form of a mist. The mist nozzle 6 is arranged so as to face the bathroom 5. The mist nozzle 6 sprays mist-like water into the bathroom 5.

  The controller 90 controls the operation of each component of the bathroom air conditioner 1. The control by the controller 90 will be described later.

  Next, operation | movement of said bathroom air conditioner 1 is demonstrated. The processing executed by the controller 90 will be described with reference to the flowchart of FIG. 2 and the timing chart of FIG.

(First embodiment)
First, in the initial state, the heat medium heated by the gas heat source apparatus 100 is sent to the first heat medium forward path 21 a of the bathroom air conditioner 1 by the feeding heat medium path 105. In the initial state, it is assumed that the first heat medium valve 31 provided in the first heat medium forward path 21a of the bathroom air conditioner 1 is in a closed state. Further, it is assumed that the second heat medium valve 32 provided in the second heat medium return path 22b is in a closed state. In this case, the heat medium in the first heat medium path 21 (the first heat medium forward path 21a and the first heat medium return path 21b) does not flow, and the heat medium is not sent to the gas-liquid heat exchanger 2. Further, the heat medium in the second heat medium path 22 (second heat medium forward path 22a and second heat medium return path 22b) is not flowing, and the heat medium is not sent to the liquid-liquid heat exchanger 3. .

  In the initial state, tap water is sent to the first water supply passage 41 of the bathroom air conditioner 1. Moreover, suppose that the water supply valve 52 provided in the 1st water supply path 41 is a closed state. Further, it is assumed that the mist valve 51 provided in the second water supply passage 42 is in a closed state. In this case, the water in the 1st water supply path 41 and the 2nd water supply path 42 is not flowing, and it is in the state where water is not sent to the mist nozzle 6.

  In the initial state, the circulation fan 4 is stopped. Therefore, the air is not circulating between the gas-liquid heat exchanger 2 and the bathroom 5, and the air heated by the gas-liquid heat exchanger 2 is not sent into the bathroom 5. The temperature in the bathroom 5 is detected by a bathroom temperature sensor 8. In the initial state, the temperature in the bathroom detected by the bathroom temperature sensor 8 (detected temperature Tr of the bathroom temperature sensor 8) is still low.

  When the mist operation starts from the initial state, the controller 90 of the bathroom air conditioner 1 executes the following processing.

  As shown in FIGS. 2 and 3, first, in S <b> 11, the controller 90 opens the first heat medium valve 31 provided in the first heat medium forward path 21 a of the bathroom air conditioner 1. When the first heat medium valve 31 is opened, the heat medium in the first heat medium path 21 (the first heat medium forward path 21a and the first heat medium return path 21b) starts to flow. Therefore, the heat medium is sent from the feed heat medium path 105 of the gas heat source device 100 to the first heat medium forward path 21a, and flows through the first heat medium forward path 21a to the gas-liquid heat exchanger 2.

  When the heat medium flows through the first heat medium forward path 21a, the temperature of the heat medium is detected by the heat medium temperature sensor 7 provided in the first heat medium forward path 21a. At the time of S11, the temperature of the heat medium detected by the heat medium temperature sensor 7 (the detection temperature Tw of the heat medium temperature sensor 7) is still low. Thereafter, the detected temperature Tw of the heat medium temperature sensor 7 increases with time (see FIG. 3).

  In the gas-liquid heat exchanger 2, the air sent into the bathroom 5 is heated by the heat medium sent to the gas-liquid heat exchanger 2 from the first heat medium forward path 21a. Air is heated by heat exchange between the heat medium and air. At this time, since the circulation fan 4 is stopped, the air heated by the gas-liquid heat exchanger 2 is not sent into the bathroom 5. Therefore, the temperature in the bathroom 5 (detected temperature Tr of the bathroom temperature sensor 8) detected by the bathroom temperature sensor 8 is still low (see FIG. 3). The heat medium after heat exchange in the gas-liquid heat exchanger 2 flows through the first heat medium return path 21b. The heat medium after the heat exchange is sent to the return heat medium path 106 of the gas heat source device 100 through the first heat medium return path 21b.

  In subsequent S12, the controller 90 determines whether or not the detected temperature Tw of the heat medium temperature sensor 7 is equal to or higher than a predetermined reference heat medium temperature Ta. The predetermined reference heat medium temperature Ta is 40 ° C., for example. If the detected temperature Tw of the heat medium temperature sensor 7 is equal to or higher than a predetermined reference heat medium temperature Ta (40 ° C.), the controller 90 determines Yes in S12 and proceeds to S13. When the detected temperature Tw of the heat medium temperature sensor 7 is not equal to or lower than the predetermined reference heat medium temperature Ta (40 ° C.), the controller 90 determines No in S12 and waits.

  In subsequent S13, the controller 90 drives the circulation fan 4. When the circulation fan 4 is driven, air circulates between the gas-liquid heat exchanger 2 and the bathroom 5, and the air heated by the gas-liquid heat exchanger 2 is sent into the bathroom 5. At the time of S13, the temperature of the heat medium is higher than that at the time of S11. Air heated by a high-temperature heat medium is sent into the bathroom 5. As a result, the temperature in the bathroom 5 increases and the detection temperature Tr of the bathroom temperature sensor 8 increases (see FIG. 3).

  In subsequent S14, the controller 90 opens the second heat medium valve 32 provided in the second heat medium return path 22b. Note that the order of the procedures of S13 and S14 is not particularly limited, and the circulation fan 4 may be driven after the second heat medium valve 32 is opened. Moreover, you may perform both simultaneously. When the second heat medium valve 32 is opened in S14, the heat medium in the second heat medium path 22 (the second heat medium forward path 22a and the second heat medium return path 22b) starts to flow. In addition, since the second heat medium forward path 22a is connected to the first heat medium forward path 21a, a part of the heat medium flowing through the first heat medium forward path 21a flows to the second heat medium forward path 22a. The heat medium that has flowed through the second heat medium forward path 22 a is sent to the liquid-liquid heat exchanger 3.

  A heat medium is sent to the liquid-liquid heat exchanger 3 from the second heat medium forward path 22a. In the liquid-liquid heat exchanger 3, the water in the liquid-liquid heat exchanger 3 is heated by the heat medium sent to the liquid-liquid heat exchanger 3 through the second heat medium forward path 22a. Water is heated by heat exchange between the heat medium and water. The heat medium after heat exchange in the liquid-liquid heat exchanger 3 flows through the second heat medium return path 22b. The heat medium after the heat exchange is sent to the first heat medium return path 21b through the second heat medium return path 22b.

  In subsequent S15, the controller 90 determines whether or not the detected temperature Tr of the bathroom temperature sensor 8 is equal to or higher than a predetermined reference bathroom temperature Tb. The predetermined reference bathroom temperature Tb is, for example, 25 ° C. If the detected temperature Tr of the bathroom temperature sensor 8 is equal to or higher than a predetermined reference bathroom temperature Tb (25 ° C.), the controller 90 determines Yes in S15 and proceeds to S16. On the other hand, if the detected temperature Tr of the bathroom temperature sensor 8 is not equal to or lower than the predetermined reference bathroom temperature Tb (25 ° C.), the controller 90 determines No in S15 and waits.

  In subsequent S16, the controller 90 simultaneously opens the water supply valve 52 provided in the first water supply passage 41 and the mist valve 51 provided in the second water supply passage 42. When the water supply valve 52 and the mist valve 51 are opened, the water in the first water supply passage 41 and the second water supply passage 42 starts to flow. The water that has flowed through the first water supply path 41 is sent to the liquid-liquid heat exchanger 3. Further, the water flowing through the second water supply passage 42 is sent to the mist nozzle 6. Water heated by the liquid-liquid heat exchanger 3 is sent to the mist nozzle 6. The mist nozzle 6 sprays the water sent to the mist nozzle 6 through the second water supply passage 42 into the bathroom 5 in the form of a mist. Water heated by the liquid-liquid heat exchanger 3 is sprayed into the bathroom 5. Thereafter, mist-like water is sprayed into the bathroom 5 until the mist operation is completed.

  The configuration and operation of the bathroom air conditioner 1 have been described above. As is apparent from the above description, the bathroom air conditioner 1 includes a gas / liquid heat exchanger 2, a liquid / liquid heat exchanger 3 connected in parallel to the gas / liquid heat exchanger 2, and a gas / liquid heat exchanger 2. The first heat medium forward path 21a for sending the heat medium, the first heat medium return path 21b for returning the heat medium from the gas-liquid heat exchanger 2, and the first heat medium forward path 21a are branched, and the first heat medium forward path 21a. The second heat medium forward path 22a for sending a part of the heat medium flowing through the liquid-liquid heat exchanger 3 and the first heat medium return path 21b are joined together to return the second heat medium from the liquid-liquid heat exchanger 3 The heat medium return path 22b and the 1st water supply path 41 which sends water to the liquid-liquid heat exchanger 3 are provided. The bathroom air conditioner 1 also includes a mist nozzle 6 and a second water supply path 42 that sends water from the liquid-liquid heat exchanger 3 to the mist nozzle 6. The bathroom air conditioner 1 also flows through the first heat medium valve 31 that opens and closes the first heat medium forward path 21a, the second heat medium valve 32 that opens and closes the second heat medium return path 22b, and the first heat medium forward path 21a. A heat medium temperature sensor 7 that detects the temperature of the heat medium, a mist valve 51 that opens and closes the second water supply path 42, a bathroom temperature sensor 8 that detects the temperature in the bathroom 5, and a controller 90 are provided. This bathroom air conditioner 1 can perform mist operation. In the mist operation, the gas-liquid heat exchanger 2 heats the air sent into the bathroom 5 by the heat medium sent to the gas-liquid heat exchanger 2 through the first heat medium forward path 21a, and the liquid-liquid heat exchanger 3 The water sent to the liquid-liquid heat exchanger 3 by the first water supply path 41 is heated by the heat medium sent to the liquid-liquid heat exchanger 3 by the second heat medium forward path 22a, and the mist nozzle 6 The water sent from the liquid-liquid heat exchanger 3 to the mist nozzle 6 by the water channel 42 is sprayed into the bathroom 5 in the form of mist. The controller 90 performs a process of opening the first heat medium valve 31 while the second heat medium valve 32 and the mist valve 51 are closed at the start of the mist operation (see S11 in FIG. 2), a heat medium temperature sensor. 7 to open the second heat medium valve 32 when the temperature of the heat medium detected by 7 reaches a predetermined reference heat medium temperature Ta (see S12 and S14 in FIG. 2), and open the mist valve 51. The processing for setting the status is executed in this order (see S16 in FIG. 2).

  According to such a configuration, since the second heat medium valve 32 is closed at the start of the mist operation, the heat medium in the second heat medium forward path 22a is not flowing. Therefore, the heat medium is not sent from the second heat medium forward path 22a to the liquid-liquid heat exchanger 3. When the controller 90 opens the first heat medium valve 31 in this state, the heat medium in the first heat medium forward passage 21 a flows and the heat medium is sent to the gas-liquid heat exchanger 2. Thus, according to said structure, while the heat medium sent from the gas heat source apparatus 100 is low temperature, it heats to the gas-liquid heat exchanger 2 in the state in which the heat medium is not sent to the liquid-liquid heat exchanger 3. The medium can be sent. Therefore, at the start of the mist operation, the heat medium can be concentrated and sent to the gas-liquid heat exchanger 2 without being sent to the liquid-liquid heat exchanger 3, and the heat generated by the heat radiation from the heat medium in the liquid-liquid heat exchanger 3 can be sent. Can prevent wasteful consumption. In this case, although heat dissipation from the heat medium in the gas-liquid heat exchanger 2 exists, the heat dissipation in the gas-liquid heat exchanger 2 is used for subsequent heating in the bathroom 5, so heat is wasted. Will not be consumed. Further, while the heat medium sent from the gas heat source device 100 is at a low temperature, the water staying in the liquid-liquid heat exchanger 3 is not heated unnecessarily. It is possible to suppress an increase in internal water pressure. Thereafter, the controller 90 opens the second heat medium valve 32 when the temperature of the heat medium detected by the heat medium temperature sensor 7 reaches the reference heat medium temperature Ta, and then opens the mist valve 51. To do. Thereby, after the temperature of the heat medium sent from the gas heat source device 100 becomes high, the heat medium can be sent to the liquid-liquid heat exchanger 3 and the water sent to the mist nozzle 6 can be heated.

  As mentioned above, according to said bathroom air conditioner 1, by sending a heat medium only to the gas-liquid heat exchanger 2 at the time of the start of mist operation, and sending a heat medium also to the liquid-liquid heat exchanger 3 after that, The heat of the heat medium is not wasted by heat radiation from the liquid-liquid heat exchanger 3.

  On the other hand, in the bathroom air conditioner of the prior art, as shown in FIG. 7, the first heat medium valve 31 is opened and the second heat medium valve 32 is opened at the start of the mist operation. . Therefore, the heat medium is sent to both the gas-liquid heat exchanger 2 and the liquid-liquid heat exchanger 3 at the start of the mist operation. In the gas-liquid heat exchanger 2, the air in the vicinity of the gas-liquid heat exchanger 2 is heated by the heat medium, and in the liquid-liquid heat exchanger 3, the water staying in the liquid-liquid heat exchanger 3 is heated by the heat medium. The From the start of the mist operation, both air and water are heated by the heat medium. For this reason, heat is wasted due to heat dissipation in the liquid-liquid heat exchanger 3, and water staying in the liquid-liquid heat exchanger 3 rises in temperature, leading to an increase in water pressure. In the prior art, the water pressure in the liquid-liquid heat exchanger 3, the first water supply passage 41, and the second water supply passage 42 is increased. Therefore, as shown in S201 of FIG. 7, the first overpressure relief valve 55 and the second overpressure valve It is necessary to open the pressure relief valve 56.

  Further, as is apparent from the above description, the bathroom air conditioner 1 further includes a circulation fan 4 that circulates air between the gas-liquid heat exchanger 2 and the bathroom 5. Further, the controller 90 opens the first heat medium valve 31 while the circulation fan 4 is stopped at the start of the mist operation (see S11 in FIG. 2), and the heat medium detected by the heat medium temperature sensor 7. When the temperature reaches the predetermined reference heat medium temperature Ta, the process of driving the circulation fan 4 is executed in this order (see S12 and S13 in FIG. 2).

  According to such a configuration, since the circulation fan 4 is stopped at the start of the mist operation, air is circulated between the bathroom 5 and the gas-liquid heat exchanger 2 before the heat medium becomes high temperature. There is no. Therefore, low-temperature air that is not heated so much by the gas-liquid heat exchanger 2 is not sent into the bathroom 5. Thereafter, the circulation fan 4 is driven when the temperature of the heat medium detected by the heat medium temperature sensor 7 reaches the reference heat medium temperature Ta. Thereby, air heated by a high-temperature heat medium can be sent into the bathroom 5, and warm air can be sent into the bathroom 5.

  Although one embodiment has been described above, the specific mode is not limited to the above embodiment. In the following description, the same components as those described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the above embodiment, the controller 90 determines whether or not the detected temperature Tr of the bathroom temperature sensor 8 is equal to or higher than a predetermined reference bathroom temperature in S15, and opens the mist valve 51 in S16 according to the determination result. However, it is not limited to this configuration. In another embodiment, as shown in FIG. 4, the controller 90 may determine whether or not a predetermined time has elapsed since the second heat medium valve 32 was opened in S15. If the predetermined time has elapsed since the second heat medium valve 32 is opened, the controller 90 determines Yes in S15 and proceeds to S16. On the other hand, if the predetermined time has not elapsed since the second heat medium valve 32 is opened, the controller 90 determines No in S15 and waits.

  In the bathroom air conditioner 1 described above, the controller 90 performs the process of opening the mist valve 51 when a predetermined time has elapsed after performing the process of opening the second heat medium valve 32 in the mist operation. (Refer to S15 and S16 in FIG. 4).

  According to such a configuration, even when the temperature in the bathroom 5 detected by the bathroom temperature sensor 8 cannot be used for the control by the controller 90, the bathroom 5 after the second heat medium valve 32 is opened. The time during which the temperature rises can be secured. And after the temperature in the bathroom 5 becomes high, the mist valve 51 can be opened and water can be sent from the liquid-liquid heat exchanger 3 to the mist nozzle 6. Therefore, mist-like water can be sprayed in the bathroom 5 after the temperature in the bathroom 5 becomes high.

(Second embodiment)
In the second embodiment, as shown in FIGS. 5 and 6, after the controller 90 drives the circulation fan 4 in S <b> 13 and before opening the second heat medium valve 32 in S <b> 14, in S <b> 31, the bathroom It is determined whether or not the detected temperature Tr of the temperature sensor 8 is equal to or higher than a predetermined first reference bathroom temperature Tb1. The predetermined first reference bathroom temperature Tb1 is 20 ° C., for example. If the detected temperature Tr of the bathroom temperature sensor 8 is equal to or higher than a predetermined first reference bathroom temperature Tb1 (20 ° C.), the controller 90 determines Yes in S31 and proceeds to S14. On the other hand, if the detected temperature Tr of the bathroom temperature sensor 8 is not equal to or lower than the predetermined first reference bathroom temperature Tb1 (20 ° C.), the controller 90 determines No in S31 and waits.

  In S15 following S14, the controller 90 determines whether or not the detected temperature Tr of the bathroom temperature sensor 8 is equal to or higher than a predetermined second reference bathroom temperature Tb2. The predetermined second reference bathroom temperature Tb2 is, for example, 25 ° C. If the detected temperature Tr of the bathroom temperature sensor 8 is equal to or higher than a predetermined second reference bathroom temperature Tb2 (25 ° C.), the controller 90 determines Yes in S15 and proceeds to S16. On the other hand, if the detected temperature Tr of the bathroom temperature sensor 8 is not equal to or lower than the predetermined second reference bathroom temperature Tb2 (25 ° C.), the controller 90 determines No in S15 and waits. The second reference bathroom temperature Tb2 (25 ° C.) is higher than the first reference bathroom temperature Tb1 (20 ° C.).

  In the bathroom air conditioner 1 described above, the controller 90 performs a process of driving the circulation fan 4 in the mist operation, and the temperature Tr in the bathroom 5 detected by the bathroom temperature sensor 8 is a predetermined first reference bathroom temperature Tb1. The process is performed to open the second heat medium valve 32 when it reaches (see S31 and S14 in FIG. 5).

  According to such a configuration, the heating medium can be sent to the liquid-liquid heat exchanger 3 after the detection temperature Tr of the bathroom temperature sensor 8 reaches the first reference bathroom temperature Tb1. Therefore, the heat medium can be concentrated and sent only to the gas-liquid heat exchanger 2 without sending the heat medium to the liquid-liquid heat exchanger 3 until the temperature in the bathroom 5 becomes high. Thereby, until the temperature in the bathroom 5 becomes high, the air sent into the bathroom 5 by the gas-liquid heat exchanger 2 can be preferentially heated. Then, after the air in the bathroom 5 is warmed, the heat medium can be sent to the liquid-liquid heat exchanger 3. And the water for sending to the mist nozzle 6 in the liquid-liquid heat exchanger 3 is heated. As described above, first, the air sent into the bathroom 5 is preferentially heated by the gas-liquid heat exchanger 2, so that the temperature rise rate in the bathroom 5 can be increased as shown in FIG.

  Moreover, according to said structure, a heating medium is not sent to the liquid-liquid heat exchanger 3 until the detection temperature Tr of the bathroom temperature sensor 8 reaches 1st reference | standard bathroom temperature Tb1 (20 degreeC). Accordingly, the water to be sent to the mist nozzle 6 is not heated by the liquid-liquid heat exchanger 3, so that the water temperature and the water pressure do not increase. Thereby, the water pressure in the liquid-liquid heat exchanger 3 and the water pressure in the first water supply passage 41 and the second water supply passage 42 do not increase.

  As shown in FIGS. 3 and 6, when the second embodiment is compared with the first embodiment, in the second embodiment, the rising speed of the detected temperature Tr of the bathroom temperature sensor 8 is faster than that in the first embodiment. Therefore, in the second embodiment, the air in the bathroom 5 can be warmed faster.

  In the bathroom air conditioner 1 described above, the temperature 90 in the bathroom 5 detected by the bathroom temperature sensor 8 after the controller 90 executes the process of driving the circulation fan 4 in the mist operation is the first reference bathroom temperature Tb1. When the predetermined second reference bathroom temperature Tb2 is reached, a process for opening the mist valve 51 is executed (see S15 and S16 in FIG. 5).

  According to such a configuration, after the detection temperature Tr of the bathroom temperature sensor 8 reaches the second reference bathroom temperature Tb2, the mist valve 51 is opened and water is sent from the liquid-liquid heat exchanger 3 to the mist nozzle 6. be able to. Therefore, mist-like water can be sprayed in the bathroom 5 after the temperature in the bathroom 5 becomes high.

  In the above-described embodiment, the first heat medium valve 31 is provided in the first heat medium forward path 21a, but is not limited to this configuration. In another embodiment, the first heat medium valve 31 may be provided in the first heat medium return path 21b instead of the first heat medium forward path 21a. The first heat medium valve 31 opens and closes the first heat medium return path 21b. When the first heat medium valve 31 is opened, the heat medium in the first heat medium path 21 (the first heat medium forward path 21a and the first heat medium return path 21b) flows.

  In the above embodiment, the second heat medium valve 32 is provided in the second heat medium return path 22b. However, the present invention is not limited to this configuration. In another embodiment, the second heat medium valve 32 may be provided not in the second heat medium return path 22b but in the second heat medium forward path 22a. The second heat medium valve 32 opens and closes the second heat medium forward path 22a. When the second heat medium valve 32 is opened, the heat medium in the second heat medium path 22 (the second heat medium forward path 22a and the second heat medium return path 22b) flows.

  In the above embodiment, the mist valve 51 is provided in the second water supply passage 42, but the present invention is not limited to this configuration. In another embodiment, the mist valve 51 may be provided in the first water passage 41 instead of the second water passage 42. A mist valve 51 opens and closes the first water supply passage 41. When the mist valve 51 is opened, the water in the first water passage 41 and the second water passage 42 flows.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

1: Bathroom air conditioner 2: Gas-liquid heat exchanger 3: Liquid-liquid heat exchanger 4: Circulating fan 4a: Motor 5: Bathroom 6: Mist nozzle 7: Heat medium temperature sensor 8: Bathroom temperature sensor 9: Ventilation fan 9a: Motor 21: first heat medium path 21a: first heat medium forward path 21b: first heat medium return path 22: second heat medium path 22a: second heat medium forward path 22b: second heat medium return path 31: first heat medium valve 32: 2nd heat transfer valve 41: 1st water supply path 42: 2nd water supply path 43: Detour path 44: Water discharge path 51: Mist valve 52: Water supply valve 53: Check valve 55: 1st overpressure relief valve 56: Second overpressure relief valve 81: Mist temperature sensor 87: Variable louver 87a: Motor 90: Controller 100: Gas heat source device 101: Systern 102: Gas burner 103: Heat exchanger 104: Heating heat path 105: Heat for feeding Medium 106: Ri heat medium passage 107: pump

Claims (5)

A gas-liquid heat exchanger,
A liquid-liquid heat exchanger connected in parallel to the gas-liquid heat exchanger;
A first heat medium forward path for sending a heat medium to the gas-liquid heat exchanger;
A first heat medium return path for returning the heat medium from the gas-liquid heat exchanger;
Branching from the first heat medium forward path, a second heat medium forward path for sending a part of the heat medium flowing through the first heat medium forward path to the liquid-liquid heat exchanger;
A second heat medium return path that joins the first heat medium return path and returns the heat medium from the liquid-liquid heat exchanger;
A first water passage for sending water to the liquid-liquid heat exchanger;
A mist nozzle,
A second water passage for sending water from the liquid-liquid heat exchanger to the mist nozzle;
A first heat medium valve that opens and closes the first heat medium forward path or the first heat medium return path;
A second heat medium valve for opening and closing the second heat medium forward path or the second heat medium return path;
A heat medium temperature sensor for detecting the temperature of the heat medium flowing through the first heat medium forward path;
A mist valve for opening and closing the first water passage or the second water passage;
A bathroom temperature sensor for detecting the temperature in the bathroom;
Control means,
A bathroom air conditioner capable of performing mist operation,
The mist operation is
The gas-liquid heat exchanger heats air sent into the bathroom by a heat medium sent to the gas-liquid heat exchanger by the first heat medium forward path,
The liquid-liquid heat exchanger heats water sent to the liquid-liquid heat exchanger by the first water supply path using a heat medium sent to the liquid-liquid heat exchanger by the second heat medium forward path,
The mist nozzle is an operation of spraying the water sent from the liquid-liquid heat exchanger to the mist nozzle through the second water supply channel into the mist in the bathroom,
The control means is detected by a process of opening the first heat medium valve while the second heat medium valve and the mist valve are closed at the start of the mist operation, and the heat medium temperature sensor. When the temperature of the heat medium reaches a predetermined reference heat medium temperature, the process for opening the second heat medium valve and the process for opening the mist valve are performed in this order. A bathroom air conditioner. A circulation fan for circulating air between the gas-liquid heat exchanger and the bathroom;
The control means includes a process of opening the first heat medium valve while stopping the circulation fan at the start of the mist operation, and the temperature of the heat medium detected by the heat medium temperature sensor is a predetermined reference heat. The bathroom air conditioner according to claim 1, wherein when the medium temperature is reached, the process of driving the circulation fan is executed in this order.   In the mist operation, the control means performs the second operation when the temperature in the bathroom detected by the bathroom temperature sensor reaches a predetermined first reference bathroom temperature after executing the process of driving the circulation fan. The bathroom air conditioner of Claim 2 comprised so that the process which makes a heat-medium valve open may be performed.   In the mist operation, the control means has a predetermined second reference bathroom temperature in which the temperature in the bathroom detected by the bathroom temperature sensor is higher than the first reference bathroom temperature after executing the process of driving the circulation fan. The bathroom air conditioner according to claim 3, wherein the bathroom air conditioner is configured to execute a process of opening the mist valve when the value reaches the value. The control means is configured to execute a process of opening the mist valve when a predetermined time has elapsed after executing the process of opening the second heat medium valve in the mist operation. The bathroom air conditioner according to any one of claims 1 to 3.

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