JP2019060517A - Air conditioner - Google Patents

Abstract

To provide an air conditioner of excellent reliability, capable of surely detecting leakage of refrigerant to secure safety.SOLUTION: An air conditioner is configured to: when a refrigerant detector detects leaked refrigerant, set a first leakage control mode of issuing alarms and stopping a compressor; when receiving an operation instruction after setting the first leakage control mode; set a second leakage control mode of continuing to issue alarms and test-running the compressor on condition that the refrigerant detector has been inspected; and when the refrigerant detector does not detect refrigerant after setting the second leakage control mode, release the second leakage control mode, or when the refrigerant detector detects refrigerant, reset the first leakage control mode.SELECTED DRAWING: Figure 3

Description

  Embodiments of the present invention relate to an air conditioner using a flammable refrigerant.

  The air conditioner includes a refrigeration cycle in which a refrigerant is circulated by sequentially connecting a compressor, a condenser, a pressure reducer, and an evaporator. For example, R32 refrigerant, which has a smaller global warming potential (GWP) than conventional R410A refrigerants and R407C refrigerants, is used as a refrigerant to be charged into this refrigeration cycle.

  A refrigerant with a small global warming potential has flammability (also referred to as slight flammability). When this refrigerant leaks from piping etc. of the refrigeration cycle and stagnates, the stagnated refrigerant becomes high in concentration and becomes easy to ignite.

  As a safety measure, there is known a control in which a refrigerant detector is disposed in the indoor unit and the operation of the compressor is stopped (abnormal stop) and an alarm is issued when the refrigerant detector detects leaked refrigerant (gas refrigerant). It is done.

Patent No. 602053

  When the above-mentioned alarm is issued, the user or maintenance personnel repairs the refrigerant leak point and refills or recharges the refrigerant as needed.

  However, the refrigerant detector may deteriorate when it comes in contact with a high concentration gas refrigerant, and the performance may be degraded. If the refrigerant detector with degraded performance is used as it is, if the refrigerant leaks next time, or if the operation is resumed with the refrigerant leakage point not completely repaired, the refrigerant leaks again. It can not be detected.

  An object of the embodiments of the present invention is to provide an air conditioner with excellent reliability that can reliably detect refrigerant leakage and ensure safety.

  The air conditioner according to claim 1 includes a refrigeration cycle in which refrigerant discharged from the compressor is returned to the compressor through an outdoor heat exchanger, a decompressor, and an indoor heat exchanger; and leakage of the refrigerant when the refrigerant leaks A refrigerant detector for detecting the refrigerant, and control means. The control means sets a first leak control mode in which an alarm is generated and the compressor is stopped when the coolant detector detects the leaked coolant, and an operation command is issued after setting the first leak control mode. If it is received, the second leakage control mode is set up to test the compressor while continuing the generation of the alarm on condition that the refrigerant detector has been inspected, and after setting the second leakage control mode, The second leakage control mode is released when the refrigerant detector does not detect the refrigerant, and the first leakage control mode is reset when the refrigerant detector detects the refrigerant.

The perspective view which shows the whole structure of 1st and 2nd embodiment. FIG. 5 is a cross-sectional view showing the configuration of the indoor unit of the first and second embodiments. BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the structure of the refrigerating cycle of 1st Embodiment, and a control system. The state transition diagram showing control of a 1st embodiment. The figure which shows the structure of the refrigerating cycle of 2nd Embodiment, and a control system. The state transition diagram showing control of a 2nd embodiment.

[1] First Embodiment
A first embodiment of the present invention will be described with reference to the drawings. The overall configuration is shown in FIG. 1, and the configuration of the indoor unit is shown in cross section in FIG.

  The indoor unit 1 has a ceiling-mounted main body (also referred to as a ceiling cassette type) main body (housing), a panel (also referred to as a decorative panel) 2 that forms the lower surface portion of the main body and faces the indoor space below the ceiling surface A rectangular air inlet 2a formed in the central portion of the panel 2, a suction grill 3 covering the air inlet 2a, and a plurality of rectangular air formed at positions surrounding the air inlet 2a of the panel 2 The air outlet 2b, the louver 4 for wind direction adjustment etc. which are each arrange | positioned at these air outlets 2b are provided.

  The remote controller 20 is connected to the cable 21 derived from the indoor unit 1, and the remote controller 20 is attached to a wall surface or the like in the room. The remote controller 20 has a liquid crystal display unit 20a and an operation unit 20b, sets various operating conditions in accordance with the user's operation on the operation unit 20b, and displays the set operating conditions on the liquid crystal display unit 20b. Do. Alarm devices 31 and 32 are provided in the remote controller 20. The alarm device 31 is a buzzer that emits a sound. The alarm 32 is a light emitting diode that emits light, and emits red light, for example.

  Further, the outdoor unit 40 is connected to the indoor unit 1 via the pair of refrigerant pipes 41 and 42 and the crossover wiring 43.

  As shown in FIG. 2, the main body of the indoor unit 1 is disposed in the space under the ceiling B on the back side of the ceiling surface C through the opening of the ceiling surface C of the air conditioned room. With this arrangement, the panel 2, the air outlets 2b, the rectangular suction grille 3, and the louvers 4 face the indoor space A of the air-conditioned room. In the main body of the indoor unit 1, a bell mouth 6 and a drain pan 7 are disposed at a position facing the air suction port 2a and the suction grille 3, and an air passage 8 is formed inside the bell mouth 6. An indoor fan 5 is accommodated at the back of the ventilation path 8, and an indoor heat exchanger 9 is accommodated on a drain pan 7 around the indoor fan 5. And the ventilation path 10 is formed from the indoor heat exchanger 9 to each air blower outlet 2b. The air passage 8 and the air passage 9 communicate with each other through the indoor fan 5 and the indoor heat exchanger 8.

  By operating the indoor fan 5, as shown by an arrow in FIG. 2, the air in the indoor space A is sucked into the air passage 8 through the suction grille 3 and the air suction port 2a, and the sucked air is indoor fan 5 and indoor It flows into the ventilation path 10 through the heat exchanger 9. The air passing through the indoor heat exchanger 9 exchanges heat with the refrigerant in the indoor heat exchanger 9 and is cooled or heated to become air conditioning air. The air conditioning air that has flowed to the ventilation path 10 is discharged to the indoor space A from each air outlet 2 b.

  A refrigerant detector 12 is attached near the indoor heat exchanger 8 in the main body of the indoor unit 1, for example, in the drain pan 7. The refrigerant detector 12 detects the same refrigerant as the refrigerant (gas refrigerant) filled in the heat pump type refrigeration cycle described later, and the operation and operation of the air conditioner by the power supply voltage of the air conditioner or the built-in battery. It always operates regardless of the stop.

  A heat pump type refrigeration cycle and a control system mounted on the indoor unit 1 and the outdoor unit 40 are shown in FIG.

  In the outdoor unit 40, the outdoor heat exchanger 53 is connected by piping to the discharge port of the compressor 51 via the four-way valve 52, and the outdoor heat exchanger 53 is connected via the expansion valve (depressurizer) 54 and the refrigerant pipe 41 The indoor heat exchanger 8 of the indoor unit 1 is connected. The suction port of the compressor 51 is connected to the indoor heat exchanger 8 via the refrigerant pipe 42, the four-way valve 52, and the accumulator 55. An outdoor fan 56 is disposed in the vicinity of the outdoor heat exchanger 53.

  The compressor 51 sucks in the refrigerant from the suction port, compresses the sucked refrigerant, and discharges the refrigerant from the discharge port. As a refrigerant, for example, an R32 refrigerant having a smaller global warming potential (GWP) than the R410A refrigerant or the R407C refrigerant is used. The R32 refrigerant has a small global warming potential, but has a flammability (also referred to as slight flammability) that is easily ignited (or ignited) when reaching a predetermined concentration.

  During cooling, as indicated by the arrows, the refrigerant discharged from the compressor 51 is a four-way valve 52, an outdoor heat exchanger 53, an expansion valve 54, a refrigerant pipe 41, an indoor heat exchanger 9, a refrigerant pipe 42, a four-way valve 52 The air is drawn into the compressor 51 through the accumulator 55. By the flow of the refrigerant, the outdoor heat exchanger 53 functions as a condenser, and the indoor heat exchanger 9 functions as an evaporator. During heating, the refrigerant discharged from the compressor 51 is switched by switching the flow path of the four-way valve 52, the four-way valve 52, the refrigerant pipe 42, the indoor heat exchanger 9, the refrigerant pipe 41, the expansion valve 54, the outdoor heat exchange The air is sucked into the compressor 51 through the vessel 53, the four-way valve 52, and the accumulator 55. With the flow of the refrigerant, the indoor heat exchanger 9 functions as a condenser, and the outdoor heat exchanger 53 functions as an evaporator.

  An indoor control unit 60 is mounted on the indoor unit 1. The indoor controller 60 is connected to the remote controller 20 via the cable 21 and to the ventilating device 11. The ventilation device 11 operates a fan for ventilation when it is on to discharge the air of the conditioned room to the outside, and when it is off, it stops the fan for ventilation. An outdoor control unit 70 is mounted on the outdoor unit 40, and the outdoor control unit 70 and the indoor control unit 60 are connected to each other via the crossover wiring 43. The indoor control unit 60 and the outdoor control unit 70 each include a microcomputer and its peripheral circuit, and control the indoor unit 1 and the outdoor unit 40 in accordance with an instruction from the remote controller 20.

  And the indoor control part 60 has following 1st, 2nd, and 3rd control means as a main function.

  The first control means sets a first leakage control mode for generating an alarm and stopping the compressor 51 when the refrigerant detector 12 detects the refrigerant leaking from the heat pump type refrigeration cycle. The alarm that is generated is a first alarm that continuously turns on or off the alarm unit 31 to emit a large continuous buzzer sound or an intermittent buzzer sound, a second alarm that continuously turns on the alarm device 32 to generate red continuous light, and a remote controller This is a third alarm for displaying, for example, character information "during leak detection" on the 20 liquid crystal display units 20a.

  When the second control means receives an operation command from the remote controller 20 after setting the first leak control mode, the second control means switches to the first leak control mode on condition that the refrigerant detector 12 has been checked, The second leak control mode is set to test the compressor 51 while continuing the generation of the alarm. The trial run of the compressor 51 involves the operation of the indoor fan 8 and the outdoor fan 56. Information on whether or not the refrigerant detector 12 has been inspected is appropriately input by a user operation or a maintenance worker operation on the operation unit 20 b of the remote controller 20. The alarm continuing in the second leakage control mode is a second alarm which turns on the alarm 32 and emits continuous red light, and displays character information "during leak detection" on the liquid crystal display unit 20a of the remote controller 20. It is 3 alarm. The buzzer sound of the alarm device 31 is turned off.

  The third control means cancels the second leakage control mode when the refrigerant detector 12 does not detect the refrigerant after setting the second leakage control mode, and the first control unit detects the refrigerant when the refrigerant detector 12 detects the refrigerant. Reset leak control mode. When the second leak control mode is released, the alarm generation and the test run of the compressor 51 are stopped. In the resetting of the first leak control mode, as the second alarm, a red flashing light for intermittently turning on the alarm 32 is emitted instead of the red continuous light for turning on the alarm 32 continuously.

  Next, control executed by the indoor control unit 60 will be described with reference to the state transition diagram of FIG. 4. In FIG. 4, ○ indicates detection / on / operation, etc., and x indicates non-detection / off / stop or the like.

  When the gas refrigerant leaks from the indoor heat exchanger 9 or a refrigerant pipe in the vicinity thereof, the leaked gas refrigerant stagnates in the main body inner space of the indoor unit 1. When the liquid refrigerant leaks from the indoor heat exchanger 9 or a refrigerant pipe connected to the indoor heat exchanger 9, the leaked liquid refrigerant evaporates and becomes a gas refrigerant, and the gas refrigerant is contained in the main body of the indoor unit 1. Stay in space.

  When the refrigerant detector 12 detects the leaked gas refrigerant, the indoor control unit 60 sets the first leakage control mode. By setting the first leak control mode, the first alarm by the buzzer sound of the alarm 31, the second alarm by the red continuous light of the alarm 32, and the third alarm by the display of the character information of the liquid crystal display unit 20a are issued. , The compressor 51 is stopped, and the ventilator 11 is turned on.

  A user who notices any of the first alarm, the second alarm, and the third alarm can recognize that the refrigerant leak has occurred, and can request maintenance / inspection. Since the compressor 51 is stopped simultaneously with the occurrence of the alarm, operations such as cooling, dehumidification, heating and the like are not unnecessarily continued while the refrigerant leaks. Since the ventilating device 11 is turned on, even if the leaked refrigerant flows out from the indoor unit 1, the discharged refrigerant can be discharged to the outside without staying in the conditioned room.

  Maintenance personnel who receive a request for maintenance and inspection repair the leaked part of the refrigerant and, if necessary, replenish or refill the heat pump type refrigeration cycle with the refrigerant.

  The refrigerant detector 12 may be degraded when it comes in contact with a high concentration gas refrigerant, and the performance may be degraded. Therefore, at the time of repair, the maintenance worker takes out the refrigerant detector 12 from the indoor unit 1 and checks the taken out refrigerant detector 12.

  The refrigerant detector 12 has performance "1" and performance "2" which can be used continuously by calibration, and performance "3" which must be replaced whenever the refrigerant gas is detected. . The maintenance worker confirms which one of the performance "1", "2" and "3" the taken out refrigerant detector 12 is by the product number etc., and if the performance is "1" or "2", the refrigerant detector 12 Necessary calibration is performed and it is attached to the indoor unit 1, and if the performance is "3", a new refrigerant detector 12 replacing the refrigerant detector 12 is attached to the indoor unit 1.

  After completion of the inspection, the maintenance worker operates the operation unit 20b of the remote controller 20 to input inspection completed information indicating that the inspection of the refrigerant detector 12 is completed to the indoor control unit 60. This input information is stored in the internal memory of the indoor control unit 60.

  After the inspection completion information is input, the maintenance worker operates the operation unit 20b of the remote controller 20 to instruct start of operation. In response to this instruction, an operation command is sent from the remote controller 20 to the indoor control unit 60.

  The indoor control unit 60 that has received the operation command sets the second leakage control mode on condition that there is storage of the inspection completion information. By the setting of the second leak control mode, the second alarm by the red continuous light of the alarm device 32 and the third alarm by the display of the character information of the liquid crystal display unit 20a are continued, and the trial operation of the compressor 51 is started. Turning on of the ventilator 11 is continued.

  In this case, since the first alarm caused by the buzzer sound of the alarm 31 has a large volume and may adversely affect the surrounding environment, the first alarm caused by the buzzer sound of the alarm 31 is stopped.

  The trial run of the compressor 51 is to form the same flow of refrigerant in the heat pump type refrigeration cycle as that at the time of cooling, and the indoor fan 8 and the outdoor fan 56 are also operated. By operating the indoor fan 8 and the outdoor fan 56, it is possible to prevent an abnormal increase in pressure or temperature of the refrigerant in the heat pump type refrigeration cycle.

  If the leakage point of the refrigerant has been reliably repaired by the maintenance personnel, the refrigerant will not leak from the heat pump type refrigeration cycle even if the test operation is started, and therefore the refrigerant detector 12 does not detect the refrigerant. When repair of the leaked portion is insufficient or a new leaked portion is generated, the refrigerant leaks from the heat pump type refrigeration cycle with the start of the test operation, and the refrigerant detector 12 detects the refrigerant.

  After setting the second leak control mode, the indoor control unit 60 monitors the detection signal of the refrigerant detector 12. When the refrigerant detector 12 does not detect the refrigerant and a predetermined time for leak determination elapses, the indoor control unit 60 cancels the second leak control mode based on the determination that the repair of the leak portion is completed. With the release of the second leak control mode, the second alarm by the red continuous light of the alarm 32 and the third alarm by the display of the character information of the liquid crystal display unit 20a are stopped, and the test run of the compressor 51 is stopped and ventilation is stopped. The device 11 is turned off.

  If, after the second leak control mode is set, the refrigerant detector 12 detects the refrigerant before a predetermined time for leak determination elapses, the indoor control unit 60 determines that the repair of the leak point has not been completed. At the bottom, reset the first leak control mode. In the first leakage control mode for resetting, the first alarm by the buzzer sound of the alarm 31, the second alarm by the red blinking light of the alarm 32, and the third alarm by the display of the character information of the liquid crystal display unit 20a are issued. , The compressor 51 is stopped, and the ventilator 11 is turned on.

  In the initial setting of the first leak control mode, the red continuous light of the alarm 32 was emitted, but in the reset of the first leak control mode, the red blinking light of the alarm 32 was emitted, and the repair of the leaked part was completed. It warns maintenance personnel and users that there is no such thing.

  On the other hand, there is a possibility that maintenance personnel may instruct the start of the operation without checking the refrigerant detector 12 when repairing the leakage point. In this case, the indoor control unit 60 having received the operation command maintains the setting state of the first leak control mode without setting the second leak control mode because there is no storage of the inspection completion information. That is, the first alarm by the buzzer sound of the alarm device 31, the second alarm by the red continuous light of the alarm device 32, the generation of the third alarm by the display of the character information of the liquid crystal display unit 20a, the stop of the compressor 51, the ventilator 11 Will continue on.

  In this case, the indoor control unit 60 causes the liquid crystal display unit 20a of the remote controller 20 to display, for example, character information "Please check the refrigerant detector", indicating that the refrigerant detector 12 has not been inspected. The maintenance worker recognizes that the refrigerant detector 12 needs to be inspected by looking at this display, and can carry out the work immediately.

  Therefore, there is no problem that the operation of the compressor 51 is started without the refrigerant detector 12 whose performance has been reduced being calibrated or replaced. The refrigerant detector 12 without deterioration in performance can reliably detect the leakage of the refrigerant, thereby improving the reliability of the safety measures against the refrigerant leakage.

[2] Second embodiment
A second embodiment of the present invention will be described. As shown in FIG. 5, the outdoor unit 40 is provided with electromagnetic on-off valves 57 and 58. The on-off valve 57 opens and closes the refrigerant pipe 41 between the expansion valve 54 and the indoor heat exchanger 9. The on-off valve 58 opens and closes the refrigerant pipe 42 between the indoor heat exchanger 9 and the four-way valve 52.

  The indoor control unit 60 has the following first, second, and third control means in place of the first to third control means of the first embodiment.

  When the refrigerant detector 12 detects the refrigerant leaking from the heat pump type refrigeration cycle, the first control means generates a warning and stops the compressor 51 and closes the on-off valves 57 and 58 in a first leakage control mode. Set

  When the second control means receives an operation command from the remote controller 20 after setting the first leak control mode, the second control means switches to the first leak control mode on condition that the refrigerant detector 12 has been checked, While continuing the generation of the alarm, the second leak control mode is set to open the on-off valves 57 and 58 to test the compressor 51.

  The third control means cancels the second leak control mode with the on-off valves 57 and 58 open when the coolant detector 12 does not detect the coolant after setting the second leak control mode, and the coolant detector 12 When the refrigerant is detected, the first leak control mode is reset.

  Control executed by the indoor control unit 60 will be described with reference to the state transition diagram of FIG. 5. In FIG. 6, ○ indicates detection, on, operation, opening, etc., and x indicates non-detection, off, stop, closure, etc.

When the refrigerant detector 12 detects the leaked gas refrigerant, the indoor control unit 60 sets the first leakage control mode. By setting the first leak control mode, the first alarm by the buzzer sound of the alarm 31, the second alarm by the red continuous light of the alarm 32, and the third alarm by the display of the character information of the liquid crystal display unit 20a are issued. , The compressor 51 is stopped, and the ventilator 11 is turned on. At the same time, the user who notices any of the first alarm, the second alarm, and the third alarm that the on-off valves 57 and 58 close can recognize that the refrigerant has leaked and can request maintenance and inspection. Since the compressor 51 is stopped simultaneously with the occurrence of the alarm, operations such as cooling, dehumidification, heating and the like are not unnecessarily continued while the refrigerant leaks. Since the ventilating device 11 is turned on, even if the leaked refrigerant flows out from the indoor unit 1, the discharged refrigerant can be discharged to the outside without staying in the conditioned room. Moreover, since the on-off valves 57 and 58 are closed, the flow of the refrigerant between the outdoor unit 40 and the indoor unit 1 is stopped, and the leakage amount of the refrigerant can be minimized.

  After the inspection of the refrigerant detector 12 is completed, the maintenance worker operates the operation unit 20b of the remote controller 20 to input inspection completed information indicating that the inspection of the refrigerant detector 12 is completed to the indoor control unit 60. This input information is stored in the internal memory of the indoor control unit 60.

  After the inspection completion information is input, the maintenance worker operates the operation unit 20b of the remote controller 20 to instruct start of operation. In response to this instruction, an operation command is sent from the remote controller 20 to the indoor control unit 60.

  The indoor control unit 60 that has received the operation command sets the second leakage control mode on condition that there is storage of the inspection completion information. Due to the setting of the second leak control mode, the second alarm by the red continuous light of the alarm device 32 and the third alarm by the display of the character information of the liquid crystal display unit 20a continue, and the on-off valves 57 and 58 are opened. Trial operation of 51 is started. Turning on of the ventilator 11 is continued.

  If the leakage point of the refrigerant has been reliably repaired by the maintenance personnel, the refrigerant will not leak from the heat pump type refrigeration cycle even if the test operation is started, and therefore the refrigerant detector 12 does not detect the refrigerant. When repair of the leaked portion is insufficient or a new leaked portion is generated, the refrigerant leaks from the heat pump type refrigeration cycle with the start of the test operation, and the refrigerant detector 12 detects the refrigerant.

  After setting the second leak control mode, the indoor control unit 60 monitors the detection signal of the refrigerant detector 12. When the predetermined time for leak determination has elapsed without detecting the coolant by the coolant detector 12, the indoor control unit 60 releases the second leak control mode based on the determination that the repair of the leak location is completed. With the release of the second leak control mode, the second alarm by the red continuous light of the alarm 32 and the third alarm by the display of the character information of the liquid crystal display unit 20a are stopped, and the compressor is opened with the on-off valves 57 and 58 open. The trial operation of 51 stops and the ventilator 11 is turned off.

  After setting the second leak control mode, if the refrigerant detector 12 detects the refrigerant within a predetermined time for leak determination, the indoor control unit 60 determines that repair of the leak location has not been completed, Reset the first leak control mode. In the first leakage control mode for resetting, the first alarm by the buzzer sound of the alarm 31, the second alarm by the red blinking light of the alarm 32, and the third alarm by the display of the character information of the liquid crystal display unit 20a are issued. , The compressor 51 is stopped, and the ventilator 11 is turned on.

  When a maintenance worker instructs the start of operation without checking the refrigerant detector 12 when repairing a leaked part, the indoor control unit 60 sets the second leak control mode because there is no storage of checked information. The setting state of the first leak control mode is maintained. That is, the first alarm by the buzzer sound of the alarm 31, the second alarm by the red continuous light of the alarm 32, the generation of the third alarm by the display of the character information of the liquid crystal display unit 20a, closing of the on-off valves 57 and 58; The stopping of the compressor 51 and the turning on of the ventilator 11 continue.

  Other configurations, controls, and effects are the same as in the first embodiment. Therefore, the description is omitted.

[3] Modification
In each of the above embodiments, the alarm devices 31 and 32 that emit sound and light are used as alarm means, but not limited to sound and light, it is also possible to transmit alarm information to the user and maintenance manager by wireless communication or network communication. Good.

  In addition, the above embodiments and modifications are presented as examples, and are not intended to limit the scope of the invention. This novel embodiment and modification can be implemented in other various forms, and various omissions, rewrites and changes can be made without departing from the scope of the invention. These embodiments and modifications are included in the scope of the invention in the scope, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Indoor unit, 2 ... Panel, 2a ... Air suction port, 2b ... Air blower outlet, 3 ... Suction grille, 4 ... Louver, 5 ... Indoor fan, 8 ... Ventilation path, 9 ... Indoor heat exchanger, 10 ... Ventilation Road 11 11 Ventilation system 12 Refrigerant detector 20 Remote controller 20a Liquid crystal display 31 31 32 Alarm 40 Outdoor unit 60 Indoor control 70 Outdoor control

Claims (5)

A refrigeration cycle in which the refrigerant discharged from the compressor is returned to the compressor through an outdoor heat exchanger, a decompressor, and an indoor heat exchanger;
A refrigerant detector that detects the leaked refrigerant when the refrigerant leaks;
Control means for controlling the compressor;
Equipped with
The control means
When the refrigerant detector detects the leaked refrigerant, a first leakage control mode is set to generate an alarm and stop the compressor;
When the operation command is received after the setting of the first leak control mode, the second leak control mode of commissioning the compressor while continuing the generation of the alarm on condition that the refrigerant detector has been inspected. Set,
After the second leak control mode is set, the second leak control mode is released when the coolant detector does not detect the coolant, and the first leak control mode is reactivated when the coolant detector detects the coolant. To set
An air conditioner characterized by The control means
When the refrigerant detector detects the leaked refrigerant, a first alarm control mode is set to generate a first alarm and a second alarm and to stop the compressor.
If an operation command is received after setting the first leak control mode, generation of the first alarm is stopped and generation of the second alarm is continued on condition that the refrigerant detector has been inspected. Setting a second leakage control mode to test the compressor;
After the second leak control mode is set, the second leak control mode is released when the coolant detector does not detect the coolant, and the first leak control mode is reactivated when the coolant detector detects the coolant. To set
The air conditioner according to claim 1, characterized in that. The first alarm is a sound,
The second alarm is light,
The air conditioner according to claim 2, characterized in that. An outdoor unit accommodating at least the compressor and the outdoor heat exchanger;
An indoor unit containing at least the indoor heat exchanger;
An on-off valve for opening and closing a refrigerant flow passage between the outdoor unit and the indoor unit in the refrigeration cycle;
And further
The refrigerant detector detects the leaked refrigerant when the refrigerant leaks in the indoor unit,
The control means
When the refrigerant detector detects the leaked refrigerant, an alarm is generated and a first leakage control mode for closing the on-off valve and stopping the compressor is set.
If an operation command is received after setting the first leak control mode, the on-off valve is opened to test-run the compressor while continuing the generation of the alarm on condition that the refrigerant detector has been inspected. Set the second leak control mode,
After the setting of the second leak control mode, when the coolant detector does not detect the coolant, the second leak control mode is released while the on-off valve is open, and the coolant detector detects the coolant. Reset the first leak control mode,
The air conditioner according to claim 1, characterized in that. The control means
When the refrigerant detector detects the leaked refrigerant, a first leakage control mode is generated which generates a first alarm and a second alarm and stops the compressor and closes the on-off valve.
If an operation command is received after setting the first leak control mode, generation of the first alarm is stopped and generation of the second alarm is continued on condition that the refrigerant detector has been inspected. Setting a second leakage control mode for testing the compressor by opening the on-off valve;
After the setting of the second leak control mode, when the coolant detector does not detect the coolant, the second leak control mode is released while the on-off valve is open, and the coolant detector detects the coolant. Reset the first leak control mode,
The air conditioner according to claim 4, characterized in that.

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