WO2017134807A1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
WO2017134807A1
WO2017134807A1 PCT/JP2016/053458 JP2016053458W WO2017134807A1 WO 2017134807 A1 WO2017134807 A1 WO 2017134807A1 JP 2016053458 W JP2016053458 W JP 2016053458W WO 2017134807 A1 WO2017134807 A1 WO 2017134807A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
defrosting operation
outdoor heat
unit
outdoor
Prior art date
Application number
PCT/JP2016/053458
Other languages
French (fr)
Japanese (ja)
Inventor
将広 高村
雅史 冨田
和樹 岡田
瑞朗 酒井
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201680079374.4A priority Critical patent/CN108603706B/en
Priority to PCT/JP2016/053458 priority patent/WO2017134807A1/en
Priority to US15/780,336 priority patent/US20180356138A1/en
Priority to JP2017565360A priority patent/JP6611829B2/en
Priority to EP16889293.3A priority patent/EP3412992A4/en
Publication of WO2017134807A1 publication Critical patent/WO2017134807A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/01—Timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/17—Speeds
    • F25B2700/171—Speeds of the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air

Definitions

  • This invention relates to the air conditioning apparatus which defrosts the frost adhering to an outdoor heat exchanger.
  • an air conditioner including a refrigerant circuit in which a compressor, a flow path switching unit, an outdoor heat exchanger, an expansion unit, and an indoor heat exchanger are connected by piping is known.
  • the pressure saturation temperature of the outdoor heat exchanger acting as an evaporator is equal to or lower than the dew point temperature of the outdoor air and equal to or lower than the freezing point of water, frost adheres to the outdoor heat exchanger.
  • the air conditioner performs a defrosting operation to remove the frost adhering to the outdoor heat exchanger, thereby reducing the heat exchange performance of the outdoor heat exchanger due to frost formation. Is suppressed.
  • Patent Document 1 discloses an air conditioner including an outdoor heat exchange temperature sensor, an outside air temperature sensor, and a human body detection sensor.
  • the defrosting operation is started when the output of the outdoor heat exchange temperature sensor and the output of the outdoor air temperature sensor satisfy the start condition of the defrosting operation, and further, when the absence is detected by the human body detection sensor. Thereby, it suppresses that defrosting operation is performed when a person is in the room, and tries to maintain comfort.
  • Patent Document 1 cannot accurately determine whether or not a defrosting operation is necessary.
  • the present invention has been made to solve the above-described problems, and provides an air conditioner that improves the accuracy of determining whether or not a defrosting operation is necessary.
  • the air conditioner according to the present invention includes a refrigerant circuit in which a compressor, a flow path switching unit, an outdoor heat exchanger, an expansion unit, and an indoor heat exchanger are connected by piping, and through which refrigerant flows, heating operation and defrosting operation.
  • the defrosting operation is started when the determination means, the changing means for changing the start condition of the defrosting operation, and the start condition of the defrosting operation are satisfied based on the determination result of the determination means.
  • Switching means for switching the flow path switching unit is started when the determination means, the changing means for changing the start condition of the defrosting operation, and the start condition of the defrosting operation are satisfied based on the determination result of the determination means.
  • the start condition of the defrosting operation is changed based on the determination result in the operation information. Therefore, it is possible to accurately determine whether the defrosting operation is necessary.
  • FIG. 1 is a circuit diagram showing an air conditioner 1 according to Embodiment 1 of the present invention.
  • the air conditioner 1 will be described with reference to FIG.
  • the air conditioner 1 includes an outdoor unit 2, an indoor unit 3, and a remote controller 4.
  • the outdoor unit 2 is installed outdoors, and includes a compressor 6, a flow path switching unit 7, an outdoor heat exchanger 8, an outdoor blower 8a, an expansion unit 9, an outdoor temperature detection unit 21, and an outdoor heat exchange temperature detection unit. 22 and the outdoor control board 30a.
  • the indoor unit 3 is installed indoors, and includes an indoor heat exchanger 10, an indoor blower 10a, an indoor temperature detection unit 23, a human body detection unit 24, and an indoor control board 30b.
  • the compressor 6, the flow path switching unit 7, the outdoor heat exchanger 8, the expansion unit 9, and the indoor heat exchanger 10 are connected by a pipe to configure the refrigerant circuit 5 through which the refrigerant flows.
  • the control part 30 is comprised from the outdoor control board 30a and the indoor control board 30b.
  • the compressor 6 compresses the refrigerant.
  • the flow path switching unit 7 switches the flow direction of the refrigerant in the refrigerant circuit 5.
  • the flow path switching unit 7 switches whether the refrigerant discharged from the compressor 6 flows to the outdoor heat exchanger 8 or the indoor heat exchanger 10, thereby allowing cooling operation, heating operation, or defrosting operation. Both are done.
  • the outdoor heat exchanger 8 exchanges heat between outdoor air and the refrigerant.
  • the outdoor blower 8a blows outdoor air to the outdoor heat exchanger 8.
  • the expansion part 9 expands and depressurizes the refrigerant, and is, for example, an electromagnetic expansion valve whose opening degree is adjusted.
  • the indoor heat exchanger 10 exchanges heat between indoor air and the refrigerant.
  • the indoor blower 10a blows indoor air to the indoor heat exchanger 10.
  • the outdoor temperature detector 21 detects the outdoor temperature.
  • the outdoor heat exchanger temperature detector 22 detects the temperature of the outdoor heat exchanger 8.
  • the indoor temperature detector 23 detects the indoor temperature.
  • the human body detection unit 24 detects the presence or absence of a human body.
  • the outdoor control board 30a controls each device of the outdoor unit 2, and the indoor control board 30b controls each device of the indoor unit 3.
  • the outdoor control board 30a and the indoor control board 30b are connected by an internal / external communication line 30c, and signals are transmitted / received via the internal / external communication line 30c.
  • the remote controller 4 is connected to the indoor control board 30b via the remote control line 4a, and signals are transmitted to and received from the indoor control board 30b via the remote control line 4a.
  • the remote controller 4 transmits a stop signal for stopping the operation of the refrigerant circuit 5 to the indoor control board 30b. Thereby, the indoor unit 3 and the outdoor unit 2 are stopped.
  • the remote controller 4 transmits a start signal for starting the operation of the refrigerant circuit 5 to the indoor control board 30b. Thereby, the indoor unit 3 and the outdoor unit 2 start operation.
  • FIG. 2 is a block diagram showing the control unit 30 of the air-conditioning apparatus 1 according to Embodiment 1 of the present invention.
  • the control unit 30 is, for example, a CPU, and includes the outdoor control board 30a and the indoor control board 30b as described above.
  • the control unit 30 may be a single control board. In this case, it may be provided in either the outdoor unit 2 or the indoor unit 3.
  • the control unit 30 may be provided outside the outdoor unit 2 and the indoor unit 3.
  • the control unit 30 includes a storage unit 31, a determination unit 32, a change unit 33, and a switching unit 34.
  • the storage means 31 stores an outdoor heat exchange temperature threshold value and the like necessary for the start condition of the defrosting operation.
  • the start condition of the defrosting operation is that the temperature of the outdoor heat exchanger 8 is equal to or less than the outdoor heat exchange temperature threshold when the heating operation in which the outdoor heat exchanger 8 acts as an evaporator is performed.
  • the pressure saturation temperature of the outdoor heat exchanger 8 acting as an evaporator is lowered.
  • frost adheres to the outdoor heat exchanger 8.
  • the air conditioner 1 When frost adheres to the outdoor heat exchanger 8, the air conditioner 1 performs a defrosting operation for removing the frost attached to the outdoor heat exchanger 8, whereby the heat of the outdoor heat exchanger 8 due to a frost formation phenomenon is performed. A decrease in exchange performance is suppressed.
  • the start condition of the defrosting operation is a decrease in the temperature of the outdoor heat exchanger 8, but is not limited to this, and may be a decrease in the outdoor temperature or the like.
  • the determination means 32 determines whether or not it is necessary to change the start condition of the defrosting operation based on the operation information of the refrigerant circuit 5 when the heating operation is being performed.
  • the operation information is a temperature detected by the outdoor temperature detection unit 21. That is, the determination unit 32 determines whether or not the temperature detected by the outdoor temperature detection unit 21 is equal to or lower than the outdoor temperature threshold value.
  • the changing means 33 changes the defrosting operation start condition based on the determination result of the determining means 32.
  • the operation information is a temperature detected by the outdoor temperature detection unit 21. That is, the changing unit 33 changes the defrosting operation start condition when the determination unit 32 determines that the temperature detected by the outdoor temperature detection unit 21 is equal to or lower than the outdoor temperature threshold.
  • the start condition of the defrosting operation is that the temperature of the outdoor heat exchanger 8 is the outdoor heat when the outdoor heat exchanger 8 is operating as an evaporator. It is that it is below the crossing temperature threshold.
  • the changing means 33 changes the outdoor heat exchange temperature threshold to an outdoor heat exchange temperature relaxation threshold higher than the outdoor heat exchange temperature threshold based on the operation information of the refrigerant circuit 5 when the heating operation is being performed. is there.
  • the outdoor heat exchange temperature threshold is Thex1
  • the outdoor heat exchange temperature relaxation threshold is Thex2, Thex1 ⁇ Thex2.
  • the outdoor heat exchange temperature relaxation threshold Thex2 arrives faster than the outdoor heat exchange temperature threshold Thex1. That is, the outdoor heat exchange temperature relaxation threshold value Thex2 has a relaxed defrosting operation start condition and the defrosting operation is started earlier than the outdoor heat exchange temperature threshold value Thex1.
  • the outdoor heat exchange temperature threshold is changed to the outdoor heat exchange temperature relaxation threshold.
  • the changing means 33 further has a function of changing the start condition of the defrosting operation based on the detection result of the human body detection unit 24.
  • the changing unit 33 sets the outdoor heat exchange temperature threshold as the outdoor heat exchange temperature threshold when the human body detection unit 24 detects that a person is absent. To a higher outdoor heat exchange temperature relaxation threshold. Thereby, when there is no person, it is determined that there is a high possibility that the heating operation is unnecessary, and the defrosting operation is easily performed.
  • the switching unit 34 switches the flow path switching unit 7 so that the defrosting operation is started.
  • the start condition of the defrosting operation is that the temperature of the outdoor heat exchanger 8 is equal to or less than the outdoor heat exchange temperature threshold when the outdoor heat exchanger 8 is performing a heating operation that acts as an evaporator. is there.
  • the switching unit 34 when the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detection unit 22 is equal to or less than the outdoor heat exchanger temperature threshold, The flow path switching unit 7 is switched.
  • the switching means 34 is the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detection part 22 is below the outdoor heat exchanger temperature relaxation threshold, when the defrost operation start conditions are changed by the changing means 33.
  • control unit 30 also performs thermo-off and thermo-on operations. This compares the actual room temperature U: i ° C. and the set temperature V: j ° C. to determine whether or not to continue the operation of the outdoor unit 2 and the indoor unit 3.
  • the actual room temperature U is a temperature detected by the room temperature detector 23.
  • the set temperature V is a target room temperature set by the user or the like using the remote controller 4.
  • the control unit 30 configured by the outdoor control board 30a and the indoor control board 30b has the heating capability required by the user.
  • the thermo-off operation is performed to temporarily stop the operation. At that time, the stopped indoor unit 3 transmits a thermo-off signal to the control unit 30.
  • thermo-on operation continues even when the thermo is off.
  • the control unit 30 configured by the outdoor control board 30a and the indoor control board 30b has insufficient heating capacity required by the user.
  • the thermo-on operation is resumed.
  • the indoor unit 3 that has resumed operation transmits a thermo-on signal to the control unit 30.
  • the air conditioner 1 has a cooling operation, a heating operation, and a defrosting operation as operation modes.
  • the refrigerant flows in the order of the compressor 6, the flow path switching unit 7, the outdoor heat exchanger 8, the expansion unit 9, and the indoor heat exchanger 10, and indoor air is heat-exchanged with the refrigerant in the indoor heat exchanger 10. It is to be cooled.
  • the refrigerant flows in the order of the compressor 6, the flow path switching unit 7, the indoor heat exchanger 10, the expansion unit 9, and the outdoor heat exchanger 8, and indoor air is heat-exchanged with the refrigerant in the indoor heat exchanger 10. It is to be heated.
  • the defrosting operation the refrigerant flows in the order of the compressor 6, the flow path switching unit 7, the outdoor heat exchanger 8, the expansion unit 9, and the indoor heat exchanger 10, and removes frost adhering to the outdoor heat exchanger 8. is there.
  • the cooling operation will be described.
  • the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 6 passes through the flow path switching unit 7 and flows into the outdoor heat exchanger 8.
  • the outdoor heat exchanger 8 In the outdoor heat exchanger 8, the outdoor air blown by the outdoor fan 8 a Heat exchanges with air and condensates.
  • the condensed refrigerant in the liquid state flows into the expansion unit 9 and is expanded and depressurized in the expansion unit 9 to be in a gas-liquid two-phase state.
  • the refrigerant in the gas-liquid two-phase state flows into the indoor heat exchanger 10, and in the indoor heat exchanger 10, heat is exchanged with room air to evaporate gas. At this time, the room air is cooled and cooling is performed.
  • the evaporated refrigerant in the gas state passes through the flow path switching unit 7 and is sucked into the compressor 6.
  • the heating operation will be described.
  • the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 6 passes through the flow path switching unit 7 and flows into the indoor heat exchanger 10.
  • the indoor heat exchanger 10 the room is blown by the indoor fan 10 a. Heat exchanges with air and condensates. At this time, room air is warmed and heating is performed.
  • the condensed refrigerant in the liquid state flows into the expansion unit 9 and is expanded and depressurized in the expansion unit 9 to be in a gas-liquid two-phase state.
  • the gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 8, and in the outdoor heat exchanger 8, heat is exchanged with outdoor air to evaporate.
  • the evaporated refrigerant in the gas state passes through the flow path switching unit 7 and is sucked into the compressor 6.
  • the defrosting operation In the air conditioner 1, when heating operation is performed, frost may adhere to the outdoor heat exchanger 8. In order to remove this frost, a defrosting operation is performed.
  • the defrosting operation the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 6 passes through the flow path switching unit 7, flows into the outdoor heat exchanger 8, and melts frost attached to the outdoor heat exchanger 8.
  • the refrigerant is condensed and liquefied by exchanging heat with outdoor air.
  • the condensed liquid refrigerant flows into the expansion section 9.
  • the expansion part 9 is fully opened, and the refrigerant flows into the indoor heat exchanger 10 in a liquid state. Then, the liquid refrigerant flows into the indoor heat exchanger 10, and in the indoor heat exchanger 10, heat is exchanged with room air to evaporate. The evaporated refrigerant in the gas state passes through the flow path switching unit 7 and is sucked into the compressor 6.
  • FIG. 3 is a flowchart showing the operation of the air-conditioning apparatus 1 according to Embodiment 1 of the present invention. Next, operation
  • the determination unit 32 determines whether or not the temperature detected by the outdoor temperature detector 21 is equal to or lower than the outdoor temperature threshold (step ST1). When the temperature detected by the outdoor temperature detector 21 is larger than the outdoor temperature threshold (No in step ST1), the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detector 22 is equal to or less than the outdoor heat exchanger temperature threshold. It is determined whether or not there is (step ST2).
  • step ST2 When the temperature of the outdoor heat exchanger 8 is equal to or lower than the outdoor heat exchange temperature threshold (Yes in step ST2), the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started. On the other hand, when the temperature of the outdoor heat exchanger 8 is higher than the outdoor heat exchange temperature threshold (No in step ST2), the process returns to step ST1.
  • step ST3 when the temperature detected by the outdoor temperature detection unit 21 is equal to or lower than the outdoor temperature threshold value (Yes in step ST1), the presence or absence of a human body is detected by the human body detection unit 24 (step ST3).
  • the process proceeds to step ST2.
  • the changing unit 33 changes the outdoor heat exchange temperature threshold value to an outdoor heat exchange temperature relaxation threshold value that is higher than the outdoor heat exchange temperature threshold value. It is determined whether the temperature of the outdoor heat exchanger 8 detected by the temperature detection unit 22 is equal to or less than the outdoor heat exchange temperature relaxation threshold (step ST4).
  • step ST4 When the temperature of the outdoor heat exchanger 8 is equal to or lower than the outdoor heat exchanger temperature relaxation threshold (Yes in step ST4), the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started. On the other hand, when the temperature of the outdoor heat exchanger 8 is higher than the outdoor heat exchanger temperature relaxation threshold (No in step ST4), the process returns to step ST1.
  • the start condition of the defrosting operation is changed based on the determination result in the operation information.
  • an air conditioner in which the start condition of the defrost operation is unchanged is known.
  • the defrost operation is not performed even if the start condition of the defrost operation is satisfied.
  • the heat exchange capability of the heat exchanger 8 is reduced. This makes it impossible to accurately determine whether or not the defrosting operation is necessary.
  • Embodiment 1 since the start condition of the defrosting operation is changed based on the determination result of the operation information, it is possible to accurately determine whether or not the defrosting operation is necessary.
  • an air conditioner that determines the start of a defrosting operation based only on the presence or absence of a person.
  • the setting is such that the defrosting operation is easily performed when absent, the outdoor temperature is temporarily high.
  • the defrosting operation frequently occurs and there is a possibility that the room temperature is lowered.
  • the first embodiment suppresses frequent occurrence of defrosting that is an unnecessary defrosting operation. it can.
  • the human body detection part 24 which detects the presence or absence of a human body is further provided, and the change means 33 changes the start condition of a defrost operation based on the determination result of the determination means 32, and based on the detection result of the human body detection part 24. Is.
  • the defrosting operation is positively performed when heating capacity is not required as in the absence of a person in a range where air defrosting does not occur frequently. Therefore, the comfort of the user is not impaired when in the room.
  • the outdoor heat exchanger temperature detection part 22 which detects the temperature of the outdoor heat exchanger 8 is further provided, and the defrosting operation start condition is that the temperature detected by the outdoor heat exchanger temperature detection part 22 is equal to or less than the outdoor heat exchange temperature threshold value. Therefore, the changing means 33 relaxes the outdoor heat exchange temperature threshold that is higher than the outdoor heat exchange temperature threshold based on the operation information of the refrigerant circuit 5 when the heating operation is performed. The threshold value is changed. Thus, the necessity of defrosting can be judged by judging the temperature of the outdoor heat exchanger 8.
  • the outdoor temperature detection part 21 which detects outdoor temperature is further provided
  • operation information is the temperature detected by the outdoor temperature detection part 21
  • the determination means 32 is the temperature detected by the outdoor temperature detection part 21.
  • the change means 33 determines whether or not the temperature detected by the outdoor temperature detection unit 21 is less than or equal to the outdoor temperature threshold value in the determination means 32. The start condition of operation is changed. Thus, the necessity of defrosting can be judged more accurately by judging the outdoor temperature.
  • FIG. FIG. 4 is a block diagram showing the control unit 130 of the air-conditioning apparatus 100 according to Embodiment 2 of the present invention.
  • the second embodiment is different from the first embodiment in that the operation information is the operation frequency of the compressor 6.
  • the same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The description will focus on differences from the first embodiment.
  • the air conditioning apparatus 100 includes a frequency detection unit 125.
  • the frequency detector 125 detects the operating frequency of the compressor 6.
  • the driving information is the driving frequency detected by the frequency detection unit 125.
  • the determination unit 132 determines whether or not the operating frequency detected by the frequency detection unit 125 is equal to or higher than the frequency threshold value.
  • the operating frequency of the compressor 6 is high, the amount of heat exchange in the outdoor heat exchanger 8 is also increased, so that it is estimated that the amount of frost formation in the outdoor heat exchanger 8 increases accordingly.
  • the operation frequency of the compressor 6 is high, it is determined that there is a high possibility that frost is attached to the outdoor heat exchanger 8, and the changing unit 133 is configured so that the defrosting operation is easily performed.
  • the determination unit 132 determines that the operating frequency detected by the frequency detector 125 is equal to or higher than the frequency threshold, the outdoor heat exchange temperature threshold is changed to an outdoor heat exchange temperature relaxation threshold higher than the outdoor heat exchange temperature threshold. .
  • the frequency detection unit 125 that detects the operation frequency of the compressor 6 is further provided, the operation information is the operation frequency detected by the frequency detection unit 125, and the determination unit 132 detects the frequency. It is determined whether or not the operating frequency detected by the unit 125 is equal to or higher than the frequency threshold value.
  • the changing unit 133 determines in the determining unit 132 that the operating frequency detected by the frequency detecting unit 125 is equal to or higher than the frequency threshold value. If it is, the start condition of the defrosting operation is changed. As described above, even when the operation information is set as the operation frequency of the compressor 6, the same effects as those of the first embodiment can be obtained.
  • FIG. FIG. 5 is a block diagram showing the control unit 230 of the air-conditioning apparatus 200 according to Embodiment 3 of the present invention.
  • the third embodiment is different from the first and second embodiments in that the operation information is the operation time of the defrosting operation.
  • the same parts as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted. The description will focus on differences from the first and second embodiments.
  • the air conditioner 200 includes a time measuring unit 226.
  • the time measuring unit 226 measures the operation time of the defrosting operation.
  • the operation information is the operation time of the defrosting operation measured by the time measurement unit 226.
  • the determination unit 232 determines whether or not the operation time of the previous defrost operation measured by the time measurement unit 226 is equal to or greater than the time threshold. When the operation time of the last defrost operation is long, it is estimated that the amount of frost formation of the outdoor heat exchanger 8 still increases even now.
  • the changing means is configured to facilitate the defrosting operation.
  • the determination unit 232 determines that the operation time of the previous defrosting operation measured by the time measurement unit 226 is equal to or greater than the time threshold value
  • the outdoor heat exchange temperature threshold value is higher than the outdoor heat exchange temperature threshold value. Change to heat exchange temperature relaxation threshold.
  • the time measurement unit 226 that measures the operation time of the defrosting operation is further provided, the operation information is the operation time measured by the time measurement unit 226, and the determination unit 232 measures the time.
  • the operation time of the last defrost operation measured by the part 226 is determined whether it is more than a time threshold value, and the operation of the last defrost operation measured by the time measurement part 226 in the determination means 232 is determined.
  • the defrosting operation start condition is changed.
  • FIG. FIG. 6 is a block diagram showing the control unit 330 of the air-conditioning apparatus 300 according to Embodiment 4 of the present invention.
  • the fourth embodiment is different from the first embodiment in that the control unit 330 includes a signal determination unit 335.
  • the same parts as those in the first to third embodiments are denoted by the same reference numerals, and the description thereof will be omitted. The description will focus on the differences from the first to third embodiments.
  • the control unit 330 has signal determination means 335.
  • the signal determination means 335 permits the start of the defrosting operation when the stop signal is received from the remote controller 4, and continues the heating operation when the stop signal is not received from the remote controller 4.
  • the start condition of the defrosting operation is changed based on the temperature detected by the outdoor temperature detection unit 21 that is operation information, and is based on the detection result of the human body detection unit 24. Will not be changed.
  • the defrosting operation when the defrosting operation start condition is changed, even if the defrosting operation start condition is satisfied, the defrosting operation is set to the standby state. And when the stop signal is received by the signal determination means 335, the defrost operation standby state is canceled, and before the operation of the air conditioning apparatus 300 is stopped, the defrost operation is started. On the other hand, when the stop signal is not received by the signal determination unit 335, the standby state of the defrosting operation is maintained, and the operation of the air conditioner 300 is stopped as it is.
  • FIG. 7 is a flowchart showing the operation of the air-conditioning apparatus 300 according to Embodiment 4 of the present invention. Next, operation
  • the heating operation is started, it is determined whether the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detection unit 22 is equal to or lower than the outdoor heat exchanger temperature threshold (step ST11). ).
  • the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started.
  • step ST11 when the temperature of the outdoor heat exchanger 8 is larger than the outdoor heat exchanger temperature threshold (No in step ST11), whether or not the temperature detected by the outdoor temperature detector 21 in the determination unit 32 is equal to or lower than the outdoor temperature threshold. Is determined (step ST12).
  • the signal determination unit 335 determines whether a stop signal is received from the remote controller 4 (step ST13). .
  • the stop signal is received (Yes in step ST13)
  • the operation of the air conditioner 300 is stopped. This is because it is estimated that the outdoor heat exchanger 8 is not frosted because the outdoor temperature is high.
  • the stop signal has not been received (No in step ST13)
  • the process returns to step ST11.
  • step ST12 when the temperature detected by the outdoor temperature detection unit 21 is equal to or lower than the outdoor temperature threshold (Yes in step ST12), the outdoor heat exchange temperature threshold is higher than the outdoor heat exchange temperature threshold by the changing unit 33. It is determined whether the temperature of the outdoor heat exchanger 8 that has been changed to the AC temperature relaxation threshold and detected by the outdoor heat exchanger temperature detector 22 is equal to or lower than the outdoor heat exchanger temperature relaxation threshold (step ST14). When the temperature of the outdoor heat exchanger 8 is equal to or less than the outdoor heat exchanger temperature relaxation threshold (Yes in step ST14), the signal determination unit 335 determines whether a stop signal is received from the remote controller 4 (step ST15). .
  • step ST15 When the stop signal is received (Yes in step ST15), the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started. Thereafter, the operation of the air conditioner 300 stops.
  • the stop signal has not been received (No in step ST15)
  • the process returns to step ST11. This is because the outdoor heat exchanger 8 is presumed to be frosted because the outdoor temperature is low.
  • the signal determination unit 335 determines whether a stop signal has been received from the remote controller 4 (step S14). ST16). When the stop signal is received (Yes in step ST16), the operation of the air conditioner 300 is stopped. When the stop signal has not been received (No in step ST16), the process returns to step ST11. This is because the outdoor heat exchanger 8 is presumed to be frosted because the outdoor temperature is low, but since the stop signal has not been received, the user seeks the heating operation. By guessing.
  • the remote controller 4 that further transmits a stop signal for stopping the operation of the refrigerant circuit 5 is further provided.
  • the control unit 330 receives the stop signal from the remote controller 4, the defrosting operation starts.
  • the switching unit 34 switches the flow path switching unit 7 so that the defrosting operation is started when the signal determining unit 335 permits the start of the defrosting operation. It is.
  • the defrosting operation is actively performed, so that the heating capacity when the heating operation is necessary again can be ensured. Therefore, in addition to the effects obtained in the first embodiment, the user's comfort can be further improved.
  • the change in the defrosting operation start condition is not only based on the operation information, but also based on the detection result of the human body detection unit 24. Good.
  • the operation information may be the operation frequency of the compressor 6 as in the second embodiment, and the operation information may be the operation time of the defrosting operation as in the third embodiment. Good.
  • FIG. FIG. 8 is a block diagram showing control unit 430 of air-conditioning apparatus 400 according to Embodiment 5 of the present invention.
  • the fifth embodiment is different from the fourth embodiment in that the signal determining means 435 determines permission of the defrosting operation based on whether or not the thermo-off signal is received.
  • the same parts as those in the first to fourth embodiments are denoted by the same reference numerals, and the description thereof will be omitted. The description will focus on the differences from the first to fourth embodiments.
  • the control unit 430 has signal determination means 435.
  • the signal determination means 435 permits the start of the defrosting operation when the thermo-off signal is received from the indoor unit 3, and continues the heating operation when the thermo-off signal is not received.
  • the start condition of the defrosting operation is changed based on the temperature detected by the outdoor temperature detection unit 21 that is operation information, and is based on the detection result of the human body detection unit 24. Will not be changed.
  • the defrosting operation when the defrosting operation start condition is changed, even when the defrosting operation start condition is satisfied, the defrosting operation is set to the standby state. Then, when a thermo-off signal is received by the signal determination unit 435, the defrosting operation standby state is canceled, and before the operation of the air conditioning apparatus 400 is stopped, the defrosting operation is started. On the other hand, when the thermo-off signal is not received by the signal determination unit 435, the standby state of the defrosting operation is maintained, and the operation of the air conditioner 400 is stopped as it is.
  • FIG. 9 is a flowchart showing the operation of the air-conditioning apparatus 400 according to Embodiment 5 of the present invention. Next, operation
  • the heating operation is started, it is determined whether or not the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detection unit 22 is equal to or lower than the outdoor heat exchanger temperature threshold (step ST21). ).
  • the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started.
  • step ST21 when the temperature of the outdoor heat exchanger 8 is higher than the outdoor heat exchange temperature threshold (No in step ST21), whether or not the temperature detected by the outdoor temperature detector 21 in the determination unit 32 is equal to or lower than the outdoor temperature threshold. Is determined (step ST22).
  • the signal determination unit 435 determines whether a thermo-off signal is received from the indoor unit 3 (step ST23). .
  • the thermo-off signal is received (Yes in step ST23)
  • the operation of the outdoor unit 2 and the indoor unit 3 is stopped. This is because it is estimated that the outdoor heat exchanger 8 is not frosted because the outdoor temperature is high.
  • the thermo-off signal is not received (No in step ST23)
  • the process returns to step ST21.
  • step ST22 when the temperature detected by the outdoor temperature detection unit 21 is equal to or less than the outdoor temperature threshold (Yes in step ST22), the outdoor heat exchange temperature threshold is higher than the outdoor heat exchange temperature threshold by the changing unit 33. Whether the temperature of the outdoor heat exchanger 8 is changed to the AC temperature relaxation threshold and detected by the outdoor heat exchanger temperature detection unit 22 is determined to be equal to or lower than the outdoor heat exchanger temperature relaxation threshold (step ST24). When the temperature of the outdoor heat exchanger 8 is equal to or less than the outdoor heat exchanger temperature relaxation threshold (Yes in step ST24), the signal determination unit 435 determines whether a thermo-off signal has been received from the indoor unit 3 (step ST25). .
  • thermo-off signal is received (Yes in step ST25)
  • the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started. Thereafter, the operation of the outdoor unit 2 and the indoor unit 3 is stopped.
  • the thermo-off signal is not received (No in step ST25)
  • the process returns to step ST21. This is because the outdoor heat exchanger 8 is presumed to be frosted because the outdoor temperature is low.
  • thermo-off signal when the temperature of the outdoor heat exchanger 8 is higher than the outdoor heat exchanger temperature relaxation threshold (No in step ST24), it is determined by the signal determining means 435 whether a thermo-off signal has been received from the indoor unit 3 (step). ST26).
  • the thermo-off signal is received (Yes in step ST26)
  • the operation of the outdoor unit 2 and the indoor unit 3 is stopped.
  • the thermo-off signal is not received (No in step ST26)
  • the process returns to step ST21.
  • the controller 430 when the controller 430 receives a thermo-off thermo-off signal that temporarily stops when the actual room temperature is higher than the set temperature, the signal determination unit 435 permits the start of the defrosting operation. Further, the switching unit 34 switches the flow path switching unit 7 so that the defrosting operation is started when the signal determination unit 435 permits the start of the defrosting operation.
  • the change in the defrosting operation start condition is not only based on the operation information, but also based on the detection result of the human body detection unit 24. Good.
  • the operation information may be the operation frequency of the compressor 6 as in the second embodiment, and the operation information may be the operation time of the defrosting operation as in the third embodiment. Good.

Abstract

This air conditioner device is provided with: a refrigerant circuit in which a compressor, a channel-switching unit, an outdoor heat exchanger, an expander, and an indoor heat exchanger are connected by piping, the refrigerant circuit channeling a refrigerant; and a control unit for controlling the operation of the refrigerant circuit so as to switch between a heating operation and a defrosting operation. The control unit is provided with: a determining means for determining, if the heating operation is in progress, whether or not there is a need to change the starting condition for the defrosting operation on the basis of operation information for the refrigerant circuit; a changing means for changing the starting condition for the defrosting operation on the basis of the result of the determination by the determining means; and a switching means for switching the channel switching unit so as to start the defrosting operation when the starting condition for the defrosting operation is satisfied.

Description

空気調和装置Air conditioner
　本発明は、室外熱交換器に付着した霜を除霜する空気調和装置に関する。 This invention relates to the air conditioning apparatus which defrosts the frost adhering to an outdoor heat exchanger.
　従来、圧縮機、流路切替部、室外熱交換器、膨張部及び室内熱交換器が配管により接続された冷媒回路を備える空気調和装置が知られている。暖房運転時において、蒸発器として作用する室外熱交換器の圧力飽和温度が室外空気の露点温度以下で水の凝固点以下の場合、室外熱交換器に霜が付着する。室外熱交換器に霜が付着した場合、空気調和装置において、室外熱交換器に付着した霜を除去する除霜運転が行われることによって、着霜現象による室外熱交換器の熱交換性能の低下が抑制される。 Conventionally, an air conditioner including a refrigerant circuit in which a compressor, a flow path switching unit, an outdoor heat exchanger, an expansion unit, and an indoor heat exchanger are connected by piping is known. During the heating operation, if the pressure saturation temperature of the outdoor heat exchanger acting as an evaporator is equal to or lower than the dew point temperature of the outdoor air and equal to or lower than the freezing point of water, frost adheres to the outdoor heat exchanger. When frost adheres to the outdoor heat exchanger, the air conditioner performs a defrosting operation to remove the frost adhering to the outdoor heat exchanger, thereby reducing the heat exchange performance of the outdoor heat exchanger due to frost formation. Is suppressed.
　特許文献１には、室外熱交温度センサと外気温度センサと人体検知センサとを備えた空気調和機が開示されている。特許文献１は、室外熱交温度センサの出力及び外気温度センサの出力が、除霜運転の開始条件を満たし、更に、人体検知センサによって不在が検知されたとき、除霜運転が開始される。これにより、人が在室しているときに除霜運転が行われることを抑制し、快適性を維持しようとするものである。 Patent Document 1 discloses an air conditioner including an outdoor heat exchange temperature sensor, an outside air temperature sensor, and a human body detection sensor. In Patent Document 1, the defrosting operation is started when the output of the outdoor heat exchange temperature sensor and the output of the outdoor air temperature sensor satisfy the start condition of the defrosting operation, and further, when the absence is detected by the human body detection sensor. Thereby, it suppresses that defrosting operation is performed when a person is in the room, and tries to maintain comfort.
特開２０１１－１８５５３５号公報JP 2011-185535 A
　しかしながら、特許文献１に開示された空気調和機は、除霜運転の開始条件が不変である。このため、人が在室している限り、除霜運転の開始条件を満たしても、除霜運転が行われず、室外熱交換器の熱交換能力が低下してしまう。このように、特許文献１は、除霜運転の要否を正確に判断することができない。 However, in the air conditioner disclosed in Patent Document 1, the start condition of the defrosting operation is unchanged. For this reason, as long as the person is present, even if the start condition of the defrosting operation is satisfied, the defrosting operation is not performed, and the heat exchange capability of the outdoor heat exchanger is reduced. Thus, Patent Document 1 cannot accurately determine whether or not a defrosting operation is necessary.
　本発明は、上記のような課題を解決するためになされたもので、除霜運転の要否の判断精度を高める空気調和装置を提供するものである。 The present invention has been made to solve the above-described problems, and provides an air conditioner that improves the accuracy of determining whether or not a defrosting operation is necessary.
　本発明に係る空気調和装置は、圧縮機、流路切替部、室外熱交換器、膨張部及び室内熱交換器が配管により接続され、冷媒が流れる冷媒回路と、暖房運転と除霜運転とを切り替えるように冷媒回路の動作を制御する制御部と、を備え、制御部は、暖房運転が実施されている場合、冷媒回路の運転情報に基づいて、除霜運転の開始条件の変更の要否を判定する判定手段と、判定手段の判定結果に基づいて、除霜運転の開始条件を変更する変更手段と、除霜運転の開始条件が満たされた場合、除霜運転が開始されるように流路切替部を切り替える切替手段と、を有する。 The air conditioner according to the present invention includes a refrigerant circuit in which a compressor, a flow path switching unit, an outdoor heat exchanger, an expansion unit, and an indoor heat exchanger are connected by piping, and through which refrigerant flows, heating operation and defrosting operation. A control unit that controls the operation of the refrigerant circuit so as to switch, and when the heating operation is performed, the control unit needs to change the start condition of the defrosting operation based on the operation information of the refrigerant circuit The defrosting operation is started when the determination means, the changing means for changing the start condition of the defrosting operation, and the start condition of the defrosting operation are satisfied based on the determination result of the determination means. Switching means for switching the flow path switching unit.
　本発明によれば、運転情報における判定結果に基づいて、除霜運転の開始条件が変更される。従って、除霜運転の要否を正確に判断することができる。 According to the present invention, the start condition of the defrosting operation is changed based on the determination result in the operation information. Therefore, it is possible to accurately determine whether the defrosting operation is necessary.
本発明の実施の形態１に係る空気調和装置１を示す回路図である。It is a circuit diagram which shows the air conditioning apparatus 1 which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置１の制御部３０を示すブロック図である。It is a block diagram which shows the control part 30 of the air conditioning apparatus 1 which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置１の動作を示すフローチャートである。It is a flowchart which shows operation | movement of the air conditioning apparatus 1 which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係る空気調和装置１００の制御部１３０を示すブロック図である。It is a block diagram which shows the control part 130 of the air conditioning apparatus 100 which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係る空気調和装置２００の制御部２３０を示すブロック図である。It is a block diagram which shows the control part 230 of the air conditioning apparatus 200 which concerns on Embodiment 3 of this invention. 本発明の実施の形態４に係る空気調和装置３００の制御部３３０を示すブロック図である。It is a block diagram which shows the control part 330 of the air conditioning apparatus 300 which concerns on Embodiment 4 of this invention. 本発明の実施の形態４に係る空気調和装置３００の動作を示すフローチャートである。It is a flowchart which shows operation | movement of the air conditioning apparatus 300 which concerns on Embodiment 4 of this invention. 本発明の実施の形態５に係る空気調和装置４００の制御部４３０を示すブロック図である。It is a block diagram which shows the control part 430 of the air conditioning apparatus 400 which concerns on Embodiment 5 of this invention. 本発明の実施の形態５に係る空気調和装置４００の動作を示すフローチャートである。It is a flowchart which shows operation | movement of the air conditioning apparatus 400 which concerns on Embodiment 5 of this invention.
実施の形態１．
　以下、本発明に係る空気調和装置の実施の形態について、図面を参照しながら説明する。図１は、本発明の実施の形態１に係る空気調和装置１を示す回路図である。この図１に基づいて、空気調和装置１について説明する。図１に示すように、空気調和装置１は、室外機２と室内機３とリモートコントローラ４とを備えている。室外機２は、室外に設置されるものであり、圧縮機６、流路切替部７、室外熱交換器８、室外送風機８ａ、膨張部９、室外温度検出部２１、室外熱交温度検出部２２及び室外制御基板３０ａを有している。室内機３は、室内に設置されるものであり、室内熱交換器１０、室内送風機１０ａ、室内温度検出部２３、人体検出部２４及び室内制御基板３０ｂを有している。ここで、圧縮機６、流路切替部７、室外熱交換器８、膨張部９及び室内熱交換器１０が配管により接続されて、冷媒が流れる冷媒回路５が構成されている。なお、室外制御基板３０ａと室内制御基板３０ｂとから制御部３０が構成されている。 Embodiment 1 FIG.
Hereinafter, embodiments of an air-conditioning apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram showing an air conditioner 1 according to Embodiment 1 of the present invention. The air conditioner 1 will be described with reference to FIG. As shown in FIG. 1, the air conditioner 1 includes an outdoor unit 2, an indoor unit 3, and a remote controller 4. The outdoor unit 2 is installed outdoors, and includes a compressor 6, a flow path switching unit 7, an outdoor heat exchanger 8, an outdoor blower 8a, an expansion unit 9, an outdoor temperature detection unit 21, and an outdoor heat exchange temperature detection unit. 22 and the outdoor control board 30a. The indoor unit 3 is installed indoors, and includes an indoor heat exchanger 10, an indoor blower 10a, an indoor temperature detection unit 23, a human body detection unit 24, and an indoor control board 30b. Here, the compressor 6, the flow path switching unit 7, the outdoor heat exchanger 8, the expansion unit 9, and the indoor heat exchanger 10 are connected by a pipe to configure the refrigerant circuit 5 through which the refrigerant flows. In addition, the control part 30 is comprised from the outdoor control board 30a and the indoor control board 30b.
　圧縮機６は、冷媒を圧縮するものである。流路切替部７は、冷媒回路５において冷媒の流れる方向を切り替えるものである。流路切替部７は、圧縮機６から吐出された冷媒が室外熱交換器８に流れるか室内熱交換器１０に流れるかを切り替えるものであり、これにより、冷房運転、暖房運転又は除霜運転のいずれもが行われる。室外熱交換器８は、室外空気と冷媒とを熱交換するものである。室外送風機８ａは、室外熱交換器８に室外空気を送風するものである。膨張部９は、冷媒を膨張及び減圧するものであり、例えば開度が調整される電磁膨張弁である。室内熱交換器１０は、室内空気と冷媒とを熱交換するものである。室内送風機１０ａは、室内熱交換器１０に室内空気を送風するものである。 The compressor 6 compresses the refrigerant. The flow path switching unit 7 switches the flow direction of the refrigerant in the refrigerant circuit 5. The flow path switching unit 7 switches whether the refrigerant discharged from the compressor 6 flows to the outdoor heat exchanger 8 or the indoor heat exchanger 10, thereby allowing cooling operation, heating operation, or defrosting operation. Both are done. The outdoor heat exchanger 8 exchanges heat between outdoor air and the refrigerant. The outdoor blower 8a blows outdoor air to the outdoor heat exchanger 8. The expansion part 9 expands and depressurizes the refrigerant, and is, for example, an electromagnetic expansion valve whose opening degree is adjusted. The indoor heat exchanger 10 exchanges heat between indoor air and the refrigerant. The indoor blower 10a blows indoor air to the indoor heat exchanger 10.
　室外温度検出部２１は、室外の温度を検出するものである。室外熱交温度検出部２２は、室外熱交換器８の温度を検出するものである。室内温度検出部２３は、室内の温度を検出するものである。人体検出部２４は、人体の有無を検出するものである。室外制御基板３０ａは、室外機２の各機器を制御するものであり、室内制御基板３０ｂは、室内機３の各機器を制御するものである。室外制御基板３０ａと室内制御基板３０ｂとは、内外通信線３０ｃによって接続されており、内外通信線３０ｃを介して信号の送受信が行われる。 The outdoor temperature detector 21 detects the outdoor temperature. The outdoor heat exchanger temperature detector 22 detects the temperature of the outdoor heat exchanger 8. The indoor temperature detector 23 detects the indoor temperature. The human body detection unit 24 detects the presence or absence of a human body. The outdoor control board 30a controls each device of the outdoor unit 2, and the indoor control board 30b controls each device of the indoor unit 3. The outdoor control board 30a and the indoor control board 30b are connected by an internal / external communication line 30c, and signals are transmitted / received via the internal / external communication line 30c.
　リモートコントローラ４は、リモコン線４ａによって室内制御基板３０ｂに接続されており、リモコン線４ａを介して室内制御基板３０ｂとの間で信号の送受信が行われる。例えば、リモートコントローラ４は、冷媒回路５の運転を停止する停止信号を室内制御基板３０ｂに送信する。これにより、室内機３及び室外機２が停止する。また、リモートコントローラ４は、冷媒回路５の運転を開始する開始信号を室内制御基板３０ｂに送信する。これにより、室内機３及び室外機２が運転を開始する。 The remote controller 4 is connected to the indoor control board 30b via the remote control line 4a, and signals are transmitted to and received from the indoor control board 30b via the remote control line 4a. For example, the remote controller 4 transmits a stop signal for stopping the operation of the refrigerant circuit 5 to the indoor control board 30b. Thereby, the indoor unit 3 and the outdoor unit 2 are stopped. In addition, the remote controller 4 transmits a start signal for starting the operation of the refrigerant circuit 5 to the indoor control board 30b. Thereby, the indoor unit 3 and the outdoor unit 2 start operation.
　図２は、本発明の実施の形態１に係る空気調和装置１の制御部３０を示すブロック図である。次に、制御部３０について説明する。本実施の形態１において、制御部３０は、例えばＣＰＵであり、前述の如く、室外制御基板３０ａと室内制御基板３０ｂとから構成されているが、制御部３０は、単一の制御基板としてもよく、この場合、室外機２及び室内機３のいずれか一方に設けられていてもよい。また、制御部３０は、室外機２及び室内機３の外部に設けられていてもよい。図２に示すように、制御部３０は、記憶手段３１と、判定手段３２と、変更手段３３と、切替手段３４とを有している。 FIG. 2 is a block diagram showing the control unit 30 of the air-conditioning apparatus 1 according to Embodiment 1 of the present invention. Next, the control unit 30 will be described. In the first embodiment, the control unit 30 is, for example, a CPU, and includes the outdoor control board 30a and the indoor control board 30b as described above. However, the control unit 30 may be a single control board. In this case, it may be provided in either the outdoor unit 2 or the indoor unit 3. The control unit 30 may be provided outside the outdoor unit 2 and the indoor unit 3. As shown in FIG. 2, the control unit 30 includes a storage unit 31, a determination unit 32, a change unit 33, and a switching unit 34.
　記憶手段３１は、除霜運転の開始条件に必要な室外熱交換温度閾値等を記憶するものである。除霜運転の開始条件は、室外熱交換器８が蒸発器として作用する暖房運転が行われている場合に、室外熱交換器８の温度が室外熱交温度閾値以下であることである。暖房運転が長時間行われた場合、蒸発器として作用する室外熱交換器８の圧力飽和温度が低下する。そして、室外熱交換器８の圧力飽和温度が室外空気の露点温度以下で水の凝固点以下の場合、室外熱交換器８に霜が付着する。室外熱交換器８に霜が付着した場合、空気調和装置１において、室外熱交換器８に付着した霜を除去する除霜運転が行われることによって、着霜現象による室外熱交換器８の熱交換性能の低下が抑制される。なお、本実施の形態１では、除霜運転の開始条件は、室外熱交換器８の温度の低下とされているが、これに限定されず、室外の温度の低下等としてもよい。 The storage means 31 stores an outdoor heat exchange temperature threshold value and the like necessary for the start condition of the defrosting operation. The start condition of the defrosting operation is that the temperature of the outdoor heat exchanger 8 is equal to or less than the outdoor heat exchange temperature threshold when the heating operation in which the outdoor heat exchanger 8 acts as an evaporator is performed. When the heating operation is performed for a long time, the pressure saturation temperature of the outdoor heat exchanger 8 acting as an evaporator is lowered. And when the pressure saturation temperature of the outdoor heat exchanger 8 is below the dew point temperature of outdoor air and below the freezing point of water, frost adheres to the outdoor heat exchanger 8. When frost adheres to the outdoor heat exchanger 8, the air conditioner 1 performs a defrosting operation for removing the frost attached to the outdoor heat exchanger 8, whereby the heat of the outdoor heat exchanger 8 due to a frost formation phenomenon is performed. A decrease in exchange performance is suppressed. In the first embodiment, the start condition of the defrosting operation is a decrease in the temperature of the outdoor heat exchanger 8, but is not limited to this, and may be a decrease in the outdoor temperature or the like.
　判定手段３２は、暖房運転が実施されている場合、冷媒回路５の運転情報に基づいて、除霜運転の開始条件の変更の要否を判定するものである。本実施の形態１において、運転情報は、室外温度検出部２１によって検出された温度である。即ち、判定手段３２は、室外温度検出部２１によって検出された温度が、室外温度閾値以下であるか否かを判定するものである。 The determination means 32 determines whether or not it is necessary to change the start condition of the defrosting operation based on the operation information of the refrigerant circuit 5 when the heating operation is being performed. In the first embodiment, the operation information is a temperature detected by the outdoor temperature detection unit 21. That is, the determination unit 32 determines whether or not the temperature detected by the outdoor temperature detection unit 21 is equal to or lower than the outdoor temperature threshold value.
　変更手段３３は、判定手段３２の判定結果に基づいて、除霜運転の開始条件を変更するものである。本実施の形態１において、運転情報は、室外温度検出部２１によって検出された温度である。即ち、変更手段３３は、判定手段３２において、室外温度検出部２１によって検出された温度が室外温度閾値以下と判定された場合、除霜運転の開始条件を変更するものである。 The changing means 33 changes the defrosting operation start condition based on the determination result of the determining means 32. In the first embodiment, the operation information is a temperature detected by the outdoor temperature detection unit 21. That is, the changing unit 33 changes the defrosting operation start condition when the determination unit 32 determines that the temperature detected by the outdoor temperature detection unit 21 is equal to or lower than the outdoor temperature threshold.
　前述の如く、本実施の形態１において、除霜運転の開始条件は、室外熱交換器８が蒸発器として作用する暖房運転が行われている場合に、室外熱交換器８の温度が室外熱交温度閾値以下であることである。変更手段３３は、暖房運転が実施されている場合、冷媒回路５の運転情報に基づいて、室外熱交温度閾値を、室外熱交温度閾値よりも高い室外熱交温度緩和閾値に変更するものである。室外熱交温度閾値をＴｈｅｘ１とし、室外熱交温度緩和閾値をＴｈｅｘ２とすると、Ｔｈｅｘ１＜Ｔｈｅｘ２である。これにより、暖房運転が行われて室外熱交換器８の温度が低下していく際、室外熱交温度緩和閾値Ｔｈｅｘ２の方が、室外熱交温度閾値Ｔｈｅｘ１よりも、到達するのが早い。即ち、室外熱交温度緩和閾値Ｔｈｅｘ２の方が、室外熱交温度閾値Ｔｈｅｘ１よりも、除霜運転の開始条件が緩和されており、除霜運転が早く開始される。 As described above, in the first embodiment, the start condition of the defrosting operation is that the temperature of the outdoor heat exchanger 8 is the outdoor heat when the outdoor heat exchanger 8 is operating as an evaporator. It is that it is below the crossing temperature threshold. The changing means 33 changes the outdoor heat exchange temperature threshold to an outdoor heat exchange temperature relaxation threshold higher than the outdoor heat exchange temperature threshold based on the operation information of the refrigerant circuit 5 when the heating operation is being performed. is there. When the outdoor heat exchange temperature threshold is Thex1 and the outdoor heat exchange temperature relaxation threshold is Thex2, Thex1 <Thex2. As a result, when the heating operation is performed and the temperature of the outdoor heat exchanger 8 decreases, the outdoor heat exchange temperature relaxation threshold Thex2 arrives faster than the outdoor heat exchange temperature threshold Thex1. That is, the outdoor heat exchange temperature relaxation threshold value Thex2 has a relaxed defrosting operation start condition and the defrosting operation is started earlier than the outdoor heat exchange temperature threshold value Thex1.
　このように、室外温度検出部２１によって検出された温度が室外温度閾値以下と判定された場合、室外熱交温度閾値が室外熱交温度緩和閾値に変更される。これにより、室外の温度が低い場合に、室外熱交換器８に霜が付着している可能性が高いと判断され、除霜運転が実施され易くなる。 Thus, when it is determined that the temperature detected by the outdoor temperature detector 21 is equal to or lower than the outdoor temperature threshold, the outdoor heat exchange temperature threshold is changed to the outdoor heat exchange temperature relaxation threshold. Thereby, when outdoor temperature is low, it is judged that the possibility that the frost has adhered to the outdoor heat exchanger 8 is high, and it becomes easy to perform a defrosting operation.
　また、変更手段３３は、人体検出部２４の検出結果に基づいて、除霜運転の開始条件を変更する機能を更に有する。本実施の形態１では、変更手段３３は、暖房運転が実施されている場合、人体検出部２４によって人が不在であることが検出された場合、室外熱交温度閾値を、室外熱交温度閾値よりも高い室外熱交温度緩和閾値に変更するものである。これにより、人が不在の場合に、暖房運転が不要である可能性が高いと判断され、除霜運転が実施され易くなる。 Further, the changing means 33 further has a function of changing the start condition of the defrosting operation based on the detection result of the human body detection unit 24. In the first embodiment, when the heating operation is being performed, the changing unit 33 sets the outdoor heat exchange temperature threshold as the outdoor heat exchange temperature threshold when the human body detection unit 24 detects that a person is absent. To a higher outdoor heat exchange temperature relaxation threshold. Thereby, when there is no person, it is determined that there is a high possibility that the heating operation is unnecessary, and the defrosting operation is easily performed.
　切替手段３４は、記憶手段３１に記憶された除霜運転の開始条件が満たされた場合、除霜運転が開始されるように流路切替部７を切り替える。ここで、除霜運転の開始条件は、室外熱交換器８が蒸発器として作用する暖房運転が行われている場合に、室外熱交換器８の温度が室外熱交温度閾値以下であることである。切替手段３４は、変更手段３３によって除霜運転の開始条件が変更されていない場合、室外熱交温度検出部２２によって検出された室外熱交換器８の温度が室外熱交温度閾値以下のとき、流路切替部７を切り替える。また、切替手段３４は、変更手段３３によって除霜運転の開始条件が変更された場合、室外熱交温度検出部２２によって検出された室外熱交換器８の温度が室外熱交温度緩和閾値以下のとき、流路切替部７を切り替える。 When the defrosting operation start condition stored in the storage unit 31 is satisfied, the switching unit 34 switches the flow path switching unit 7 so that the defrosting operation is started. Here, the start condition of the defrosting operation is that the temperature of the outdoor heat exchanger 8 is equal to or less than the outdoor heat exchange temperature threshold when the outdoor heat exchanger 8 is performing a heating operation that acts as an evaporator. is there. When the changing unit 33 does not change the defrosting operation start condition, the switching unit 34, when the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detection unit 22 is equal to or less than the outdoor heat exchanger temperature threshold, The flow path switching unit 7 is switched. Moreover, the switching means 34 is the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detection part 22 is below the outdoor heat exchanger temperature relaxation threshold, when the defrost operation start conditions are changed by the changing means 33. When switching the flow path switching unit 7.
　なお、制御部３０は、サーモオフ及びサーモオンの動作も行う。これは、実際の室温Ｕ：ｉ℃と、設定温度Ｖ：ｊ℃とを比較して、室外機２及び室内機３の運転を継続するか否かを判断するものである。ここで、実際の室温Ｕは、室内温度検出部２３によって検出された温度である。設定温度Ｖは、使用者等がリモートコントローラ４を使用して設定する目標室温である。暖房運転において、実際の室温Ｕが設定温度Ｖ以上（ｉ≧ｊ）の場合、室外制御基板３０ａ及び室内制御基板３０ｂから構成される制御部３０は、使用者が求める暖房能力が確保されていると判断し、運転を一旦停止するサーモオフの動作を行う。その際、停止した室内機３は、制御部３０にサーモオフ信号を送信する。 Note that the control unit 30 also performs thermo-off and thermo-on operations. This compares the actual room temperature U: i ° C. and the set temperature V: j ° C. to determine whether or not to continue the operation of the outdoor unit 2 and the indoor unit 3. Here, the actual room temperature U is a temperature detected by the room temperature detector 23. The set temperature V is a target room temperature set by the user or the like using the remote controller 4. In the heating operation, when the actual room temperature U is equal to or higher than the set temperature V (i ≧ j), the control unit 30 configured by the outdoor control board 30a and the indoor control board 30b has the heating capability required by the user. The thermo-off operation is performed to temporarily stop the operation. At that time, the stopped indoor unit 3 transmits a thermo-off signal to the control unit 30.
　なお、サーモオフのときも、動作は継続される。サーモオフのときにおいて、実際の室温Ｕが設定温度Ｖより低くなった（ｉ＜ｊ）場合、室外制御基板３０ａ及び室内制御基板３０ｂから構成される制御部３０は、使用者が求める暖房能力が不足していると判断し、運転を再開するサーモオンの動作を行う。その際、運転を再開した室内機３は、制御部３０にサーモオン信号を送信する。 The operation continues even when the thermo is off. When the actual room temperature U is lower than the set temperature V (i <j) when the thermo-off is performed, the control unit 30 configured by the outdoor control board 30a and the indoor control board 30b has insufficient heating capacity required by the user. The thermo-on operation is resumed. At that time, the indoor unit 3 that has resumed operation transmits a thermo-on signal to the control unit 30.
　次に、空気調和装置１の運転モードについて説明する。空気調和装置１は、運転モードとして、冷房運転、暖房運転及び除霜運転を有している。冷房運転は、圧縮機６、流路切替部７、室外熱交換器８、膨張部９、室内熱交換器１０の順に冷媒が流れ、室内熱交換器１０において室内空気が冷媒と熱交換されて冷却されるものである。暖房運転は、圧縮機６、流路切替部７、室内熱交換器１０、膨張部９、室外熱交換器８の順に冷媒が流れ、室内熱交換器１０において室内空気が冷媒と熱交換されて加熱されるものである。除霜運転は、圧縮機６、流路切替部７、室外熱交換器８、膨張部９、室内熱交換器１０の順に冷媒が流れ、室外熱交換器８に付着した霜を除去するものである。 Next, the operation mode of the air conditioner 1 will be described. The air conditioner 1 has a cooling operation, a heating operation, and a defrosting operation as operation modes. In the cooling operation, the refrigerant flows in the order of the compressor 6, the flow path switching unit 7, the outdoor heat exchanger 8, the expansion unit 9, and the indoor heat exchanger 10, and indoor air is heat-exchanged with the refrigerant in the indoor heat exchanger 10. It is to be cooled. In the heating operation, the refrigerant flows in the order of the compressor 6, the flow path switching unit 7, the indoor heat exchanger 10, the expansion unit 9, and the outdoor heat exchanger 8, and indoor air is heat-exchanged with the refrigerant in the indoor heat exchanger 10. It is to be heated. In the defrosting operation, the refrigerant flows in the order of the compressor 6, the flow path switching unit 7, the outdoor heat exchanger 8, the expansion unit 9, and the indoor heat exchanger 10, and removes frost adhering to the outdoor heat exchanger 8. is there.
　次に、空気調和装置１の各運転モードの動作について説明する。先ず、冷房運転について説明する。冷房運転において、圧縮機６に吸入された冷媒は、圧縮機６によって圧縮されて高温高圧のガス状態で吐出する。圧縮機６から吐出された高温高圧のガス状態の冷媒は、流路切替部７を通過して、室外熱交換器８に流入し、室外熱交換器８において、室外送風機８ａによって送風された室外空気と熱交換されて凝縮液化する。凝縮された液状態の冷媒は、膨張部９に流入し、膨張部９において膨張及び減圧されて気液二相状態となる。そして、気液二相状態の冷媒は、室内熱交換器１０に流入し、室内熱交換器１０において、室内空気と熱交換されて蒸発ガス化する。このとき、室内空気が冷やされ、冷房が実施される。蒸発したガス状態の冷媒は、流路切替部７を通過して、圧縮機６に吸入される。 Next, the operation of each operation mode of the air conditioner 1 will be described. First, the cooling operation will be described. In the cooling operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 6 passes through the flow path switching unit 7 and flows into the outdoor heat exchanger 8. In the outdoor heat exchanger 8, the outdoor air blown by the outdoor fan 8 a Heat exchanges with air and condensates. The condensed refrigerant in the liquid state flows into the expansion unit 9 and is expanded and depressurized in the expansion unit 9 to be in a gas-liquid two-phase state. The refrigerant in the gas-liquid two-phase state flows into the indoor heat exchanger 10, and in the indoor heat exchanger 10, heat is exchanged with room air to evaporate gas. At this time, the room air is cooled and cooling is performed. The evaporated refrigerant in the gas state passes through the flow path switching unit 7 and is sucked into the compressor 6.
　次に、暖房運転について説明する。暖房運転において、圧縮機６に吸入された冷媒は、圧縮機６によって圧縮されて高温高圧のガス状態で吐出する。圧縮機６から吐出された高温高圧のガス状態の冷媒は、流路切替部７を通過して、室内熱交換器１０に流入し、室内熱交換器１０において、室内送風機１０ａによって送風された室内空気と熱交換されて凝縮液化する。このとき、室内空気が暖められ、暖房が実施される。凝縮された液状態の冷媒は、膨張部９に流入し、膨張部９において膨張及び減圧されて気液二相状態となる。そして、気液二相状態の冷媒は、室外熱交換器８に流入し、室外熱交換器８において、室外空気と熱交換されて蒸発ガス化する。蒸発したガス状態の冷媒は、流路切替部７を通過して、圧縮機６に吸入される。 Next, the heating operation will be described. In the heating operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 6 passes through the flow path switching unit 7 and flows into the indoor heat exchanger 10. In the indoor heat exchanger 10, the room is blown by the indoor fan 10 a. Heat exchanges with air and condensates. At this time, room air is warmed and heating is performed. The condensed refrigerant in the liquid state flows into the expansion unit 9 and is expanded and depressurized in the expansion unit 9 to be in a gas-liquid two-phase state. Then, the gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 8, and in the outdoor heat exchanger 8, heat is exchanged with outdoor air to evaporate. The evaporated refrigerant in the gas state passes through the flow path switching unit 7 and is sucked into the compressor 6.
　次に、除霜運転について説明する。空気調和装置１において、暖房運転が行われると、室外熱交換器８に霜が付着する場合がある。この霜を除去するため、除霜運転が行われる。除霜運転において、圧縮機６に吸入された冷媒は、圧縮機６によって圧縮されて高温高圧のガス状態で吐出する。圧縮機６から吐出された高温高圧のガス状態の冷媒は、流路切替部７を通過して、室外熱交換器８に流入し、室外熱交換器８に付着した霜を溶かす。そして、冷媒は、室外熱交換器８において、室外空気と熱交換されて凝縮液化する。凝縮された液状態の冷媒は、膨張部９に流入する。このとき、膨張部９は全開にされており、冷媒は、液状態のまま室内熱交換器１０に流入する。そして、液状態の冷媒は、室内熱交換器１０に流入し、室内熱交換器１０において、室内空気と熱交換されて蒸発ガス化する。蒸発したガス状態の冷媒は、流路切替部７を通過して、圧縮機６に吸入される。 Next, the defrosting operation will be described. In the air conditioner 1, when heating operation is performed, frost may adhere to the outdoor heat exchanger 8. In order to remove this frost, a defrosting operation is performed. In the defrosting operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 6 passes through the flow path switching unit 7, flows into the outdoor heat exchanger 8, and melts frost attached to the outdoor heat exchanger 8. Then, in the outdoor heat exchanger 8, the refrigerant is condensed and liquefied by exchanging heat with outdoor air. The condensed liquid refrigerant flows into the expansion section 9. At this time, the expansion part 9 is fully opened, and the refrigerant flows into the indoor heat exchanger 10 in a liquid state. Then, the liquid refrigerant flows into the indoor heat exchanger 10, and in the indoor heat exchanger 10, heat is exchanged with room air to evaporate. The evaporated refrigerant in the gas state passes through the flow path switching unit 7 and is sucked into the compressor 6.
　図３は、本発明の実施の形態１に係る空気調和装置１の動作を示すフローチャートである。次に、本実施の形態１に係る空気調和装置１の制御部３０の動作について説明する。図３に示すように、暖房運転が開始されると、判定手段３２において、室外温度検出部２１によって検出された温度が、室外温度閾値以下であるか否かが判定される（ステップＳＴ１）。室外温度検出部２１によって検出された温度が室外温度閾値より大きい場合（ステップＳＴ１のＮｏ）、室外熱交温度検出部２２によって検出された室外熱交換器８の温度が室外熱交温度閾値以下であるかが判断される（ステップＳＴ２）。室外熱交換器８の温度が室外熱交温度閾値以下の場合（ステップＳＴ２のＹｅｓ）、切替手段３４によって、流路切替部７が切り替えられ、除霜運転が開始される。一方、室外熱交換器８の温度が室外熱交温度閾値より大きい場合（ステップＳＴ２のＮｏ）、ステップＳＴ１に戻る。 FIG. 3 is a flowchart showing the operation of the air-conditioning apparatus 1 according to Embodiment 1 of the present invention. Next, operation | movement of the control part 30 of the air conditioning apparatus 1 which concerns on this Embodiment 1 is demonstrated. As shown in FIG. 3, when the heating operation is started, the determination unit 32 determines whether or not the temperature detected by the outdoor temperature detector 21 is equal to or lower than the outdoor temperature threshold (step ST1). When the temperature detected by the outdoor temperature detector 21 is larger than the outdoor temperature threshold (No in step ST1), the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detector 22 is equal to or less than the outdoor heat exchanger temperature threshold. It is determined whether or not there is (step ST2). When the temperature of the outdoor heat exchanger 8 is equal to or lower than the outdoor heat exchange temperature threshold (Yes in step ST2), the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started. On the other hand, when the temperature of the outdoor heat exchanger 8 is higher than the outdoor heat exchange temperature threshold (No in step ST2), the process returns to step ST1.
　ここで、室外温度検出部２１によって検出された温度が室外温度閾値以下の場合（ステップＳＴ１のＹｅｓ）、人体検出部２４によって人体の有無が検出される（ステップＳＴ３）。人の在室が検出された場合（ステップＳＴ３のＮｏ）、ステップＳＴ２に進む。一方、人の不在が検出された場合（ステップＳＴ３のＹｅｓ）、変更手段３３によって、室外熱交温度閾値が、室外熱交温度閾値よりも高い室外熱交温度緩和閾値に変更され、室外熱交温度検出部２２によって検出された室外熱交換器８の温度が室外熱交温度緩和閾値以下であるかが判断される（ステップＳＴ４）。室外熱交換器８の温度が室外熱交温度緩和閾値以下の場合（ステップＳＴ４のＹｅｓ）、切替手段３４によって、流路切替部７が切り替えられ、除霜運転が開始される。一方、室外熱交換器８の温度が室外熱交温度緩和閾値より大きい場合（ステップＳＴ４のＮｏ）、ステップＳＴ１に戻る。 Here, when the temperature detected by the outdoor temperature detection unit 21 is equal to or lower than the outdoor temperature threshold value (Yes in step ST1), the presence or absence of a human body is detected by the human body detection unit 24 (step ST3). When the presence of a person is detected (No in step ST3), the process proceeds to step ST2. On the other hand, when the absence of a person is detected (Yes in step ST3), the changing unit 33 changes the outdoor heat exchange temperature threshold value to an outdoor heat exchange temperature relaxation threshold value that is higher than the outdoor heat exchange temperature threshold value. It is determined whether the temperature of the outdoor heat exchanger 8 detected by the temperature detection unit 22 is equal to or less than the outdoor heat exchange temperature relaxation threshold (step ST4). When the temperature of the outdoor heat exchanger 8 is equal to or lower than the outdoor heat exchanger temperature relaxation threshold (Yes in step ST4), the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started. On the other hand, when the temperature of the outdoor heat exchanger 8 is higher than the outdoor heat exchanger temperature relaxation threshold (No in step ST4), the process returns to step ST1.
　本実施の形態１によれば、運転情報における判定結果に基づいて、除霜運転の開始条件が変更される。従来、除霜運転の開始条件が不変である空気調和機が知られているが、人が在室している限り、除霜運転の開始条件を満たしても、除霜運転が行われず、室外熱交換器８の熱交換能力が低下してしまう。これでは、除霜運転の要否を正確に判断することができない。これに対し、本実施の形態１は、運転情報の判定結果に基づいて、除霜運転の開始条件が変更されるため、除霜運転の要否を正確に判断することができる。また、従来、人の在否のみで除霜運転の開始を判断する空気調和機が知られているが、この場合、不在時に除霜運転が行われ易い設定とすると、仮に室外の温度が高い場合、本来除霜が不要であるときにも、除霜運転が頻発し、室温の低下を招く虞がある。これに対し、本実施の形態１は、運転情報の判定結果に基づいて、除霜運転の開始条件が変更されるため、不要な除霜運転である空霜取りが頻発することを抑制することができる。 According to the first embodiment, the start condition of the defrosting operation is changed based on the determination result in the operation information. Conventionally, an air conditioner in which the start condition of the defrost operation is unchanged is known. However, as long as a person is present, the defrost operation is not performed even if the start condition of the defrost operation is satisfied. The heat exchange capability of the heat exchanger 8 is reduced. This makes it impossible to accurately determine whether or not the defrosting operation is necessary. On the other hand, in Embodiment 1, since the start condition of the defrosting operation is changed based on the determination result of the operation information, it is possible to accurately determine whether or not the defrosting operation is necessary. Conventionally, an air conditioner that determines the start of a defrosting operation based only on the presence or absence of a person is known. In this case, if the setting is such that the defrosting operation is easily performed when absent, the outdoor temperature is temporarily high. In this case, even when the defrosting is originally unnecessary, the defrosting operation frequently occurs and there is a possibility that the room temperature is lowered. On the other hand, since the start condition of the defrosting operation is changed based on the determination result of the operation information, the first embodiment suppresses frequent occurrence of defrosting that is an unnecessary defrosting operation. it can.
　また、人体の有無を検出する人体検出部２４を更に備え、変更手段３３は、判定手段３２の判定結果に基づくと共に人体検出部２４の検出結果に基づいて、除霜運転の開始条件を変更するものである。これにより、空霜取りが頻発しない範囲で、人が不在のときのような暖房能力が不要の場合に、積極的に除霜運転が行われる。従って、在室時において、使用者の快適性を損なわない。 Moreover, the human body detection part 24 which detects the presence or absence of a human body is further provided, and the change means 33 changes the start condition of a defrost operation based on the determination result of the determination means 32, and based on the detection result of the human body detection part 24. Is. As a result, the defrosting operation is positively performed when heating capacity is not required as in the absence of a person in a range where air defrosting does not occur frequently. Therefore, the comfort of the user is not impaired when in the room.
　更に、室外熱交換器８の温度を検出する室外熱交温度検出部２２を更に備え、除霜運転の開始条件は、室外熱交温度検出部２２によって検出された温度が室外熱交温度閾値以下であることであり、変更手段３３は、暖房運転が実施されている場合、冷媒回路５の運転情報に基づいて、室外熱交温度閾値を、室外熱交温度閾値よりも高い室外熱交温度緩和閾値に変更するものである。このように、室外熱交換器８の温度が判断されることにより、除霜の要否を判断することができる。 Furthermore, the outdoor heat exchanger temperature detection part 22 which detects the temperature of the outdoor heat exchanger 8 is further provided, and the defrosting operation start condition is that the temperature detected by the outdoor heat exchanger temperature detection part 22 is equal to or less than the outdoor heat exchange temperature threshold value. Therefore, the changing means 33 relaxes the outdoor heat exchange temperature threshold that is higher than the outdoor heat exchange temperature threshold based on the operation information of the refrigerant circuit 5 when the heating operation is performed. The threshold value is changed. Thus, the necessity of defrosting can be judged by judging the temperature of the outdoor heat exchanger 8.
　更にまた、室外の温度を検出する室外温度検出部２１を更に備え、運転情報は、室外温度検出部２１によって検出された温度であり、判定手段３２は、室外温度検出部２１によって検出された温度が室外温度閾値以下であるか否かを判定するものであり、変更手段３３は、判定手段３２において、室外温度検出部２１によって検出された温度が室外温度閾値以下と判定された場合、除霜運転の開始条件を変更するものである。このように、室外の温度が判断されることにより、除霜の要否をより精度良く判断することができる。 Furthermore, the outdoor temperature detection part 21 which detects outdoor temperature is further provided, operation information is the temperature detected by the outdoor temperature detection part 21, and the determination means 32 is the temperature detected by the outdoor temperature detection part 21. The change means 33 determines whether or not the temperature detected by the outdoor temperature detection unit 21 is less than or equal to the outdoor temperature threshold value in the determination means 32. The start condition of operation is changed. Thus, the necessity of defrosting can be judged more accurately by judging the outdoor temperature.
実施の形態２．
　図４は、本発明の実施の形態２に係る空気調和装置１００の制御部１３０を示すブロック図である。本実施の形態２は、運転情報が圧縮機６の運転周波数である点で、実施の形態１と相違する。本実施の形態２では、実施の形態１と同一の部分は同一の符号を付して説明を省略し、実施の形態１との相違点を中心に説明する。 Embodiment 2. FIG.
FIG. 4 is a block diagram showing the control unit 130 of the air-conditioning apparatus 100 according to Embodiment 2 of the present invention. The second embodiment is different from the first embodiment in that the operation information is the operation frequency of the compressor 6. In the second embodiment, the same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The description will focus on differences from the first embodiment.
　図４に示すように、空気調和装置１００は、周波数検出部１２５を備えている。周波数検出部１２５は、圧縮機６の運転周波数を検出するものである。本実施の形態２において、運転情報は、周波数検出部１２５によって検出された運転周波数である。判定手段１３２は、周波数検出部１２５によって検出された運転周波数が、周波数閾値以上であるか否かを判定するものである。圧縮機６の運転周波数が高い場合、室外熱交換器８における熱交換量も増えるため、その分室外熱交換器８の着霜量が多くなると推測される。このように、圧縮機６の運転周波数が高い場合に、室外熱交換器８に霜が付着している可能性が高いと判断され、除霜運転が実施され易くなるように、変更手段１３３は、判定手段１３２において、周波数検出部１２５によって検出された運転周波数が周波数閾値以上と判定された場合、室外熱交温度閾値を、室外熱交温度閾値よりも高い室外熱交温度緩和閾値に変更する。 As shown in FIG. 4, the air conditioning apparatus 100 includes a frequency detection unit 125. The frequency detector 125 detects the operating frequency of the compressor 6. In the second embodiment, the driving information is the driving frequency detected by the frequency detection unit 125. The determination unit 132 determines whether or not the operating frequency detected by the frequency detection unit 125 is equal to or higher than the frequency threshold value. When the operating frequency of the compressor 6 is high, the amount of heat exchange in the outdoor heat exchanger 8 is also increased, so that it is estimated that the amount of frost formation in the outdoor heat exchanger 8 increases accordingly. Thus, when the operation frequency of the compressor 6 is high, it is determined that there is a high possibility that frost is attached to the outdoor heat exchanger 8, and the changing unit 133 is configured so that the defrosting operation is easily performed. When the determination unit 132 determines that the operating frequency detected by the frequency detector 125 is equal to or higher than the frequency threshold, the outdoor heat exchange temperature threshold is changed to an outdoor heat exchange temperature relaxation threshold higher than the outdoor heat exchange temperature threshold. .
　本実施の形態２によれば、圧縮機６の運転周波数を検出する周波数検出部１２５を更に備え、運転情報は、周波数検出部１２５によって検出された運転周波数であり、判定手段１３２は、周波数検出部１２５によって検出された運転周波数が周波数閾値以上であるか否かを判定するものであり、変更手段１３３は、判定手段１３２において、周波数検出部１２５によって検出された運転周波数が周波数閾値以上と判定された場合、除霜運転の開始条件を変更するものである。このように、運転情報を、圧縮機６の運転周波数としても、実施の形態１と同様の効果を奏する。 According to the second embodiment, the frequency detection unit 125 that detects the operation frequency of the compressor 6 is further provided, the operation information is the operation frequency detected by the frequency detection unit 125, and the determination unit 132 detects the frequency. It is determined whether or not the operating frequency detected by the unit 125 is equal to or higher than the frequency threshold value. The changing unit 133 determines in the determining unit 132 that the operating frequency detected by the frequency detecting unit 125 is equal to or higher than the frequency threshold value. If it is, the start condition of the defrosting operation is changed. As described above, even when the operation information is set as the operation frequency of the compressor 6, the same effects as those of the first embodiment can be obtained.
実施の形態３．
　図５は、本発明の実施の形態３に係る空気調和装置２００の制御部２３０を示すブロック図である。本実施の形態３は、運転情報が除霜運転の運転時間である点で、実施の形態１，２と相違する。本実施の形態３では、実施の形態１，２と同一の部分は同一の符号を付して説明を省略し、実施の形態１，２との相違点を中心に説明する。 Embodiment 3 FIG.
FIG. 5 is a block diagram showing the control unit 230 of the air-conditioning apparatus 200 according to Embodiment 3 of the present invention. The third embodiment is different from the first and second embodiments in that the operation information is the operation time of the defrosting operation. In the third embodiment, the same parts as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted. The description will focus on differences from the first and second embodiments.
　図５に示すように、空気調和装置２００は、時間計測部２２６を備えている。時間計測部２２６は、除霜運転の運転時間を計測するものである。本実施の形態３において、運転情報は、時間計測部２２６によって計測された除霜運転の運転時間である。判定手段２３２は、時間計測部２２６によって計測された前回の除霜運転の運転時間が時間閾値以上であるか否かを判定するものである。前回の除霜運転の運転時間が長い場合、現在も依然として室外熱交換器８の着霜量が多くなると推測される。このように、前回の除霜運転の運転時間が長い場合に、室外熱交換器８に霜が付着している可能性が高いと判断され、除霜運転が実施され易くなるように、変更手段２３３は、判定手段２３２において、時間計測部２２６によって計測された前回の除霜運転の運転時間が時間閾値以上と判定された場合、室外熱交温度閾値を、室外熱交温度閾値よりも高い室外熱交温度緩和閾値に変更する。 As shown in FIG. 5, the air conditioner 200 includes a time measuring unit 226. The time measuring unit 226 measures the operation time of the defrosting operation. In the third embodiment, the operation information is the operation time of the defrosting operation measured by the time measurement unit 226. The determination unit 232 determines whether or not the operation time of the previous defrost operation measured by the time measurement unit 226 is equal to or greater than the time threshold. When the operation time of the last defrost operation is long, it is estimated that the amount of frost formation of the outdoor heat exchanger 8 still increases even now. In this way, when the operation time of the previous defrosting operation is long, it is determined that there is a high possibility that frost has adhered to the outdoor heat exchanger 8, and the changing means is configured to facilitate the defrosting operation. 233, when the determination unit 232 determines that the operation time of the previous defrosting operation measured by the time measurement unit 226 is equal to or greater than the time threshold value, the outdoor heat exchange temperature threshold value is higher than the outdoor heat exchange temperature threshold value. Change to heat exchange temperature relaxation threshold.
　本実施の形態３によれば、除霜運転の運転時間を計測する時間計測部２２６を更に備え、運転情報は、時間計測部２２６によって計測された運転時間であり、判定手段２３２は、時間計測部２２６によって計測された前回の除霜運転の運転時間が時間閾値以上であるか否かを判定するものであり、判定手段２３２において、時間計測部２２６によって計測された前回の除霜運転の運転時間が時間閾値以上と判定された場合、除霜運転の開始条件を変更するものである。このように、運転情報を、除霜運転の運転時間としても、実施の形態１，２と同様の効果を奏する。 According to the third embodiment, the time measurement unit 226 that measures the operation time of the defrosting operation is further provided, the operation information is the operation time measured by the time measurement unit 226, and the determination unit 232 measures the time. The operation time of the last defrost operation measured by the part 226 is determined whether it is more than a time threshold value, and the operation of the last defrost operation measured by the time measurement part 226 in the determination means 232 is determined. When it is determined that the time is equal to or greater than the time threshold, the defrosting operation start condition is changed. Thus, even if the operation information is used as the operation time of the defrosting operation, the same effects as those of the first and second embodiments are obtained.
実施の形態４．
　図６は、本発明の実施の形態４に係る空気調和装置３００の制御部３３０を示すブロック図である。本実施の形態４は、制御部３３０が信号判断手段３３５を有している点で、実施の形態１と相違する。本実施の形態４では、実施の形態１～３と同一の部分は同一の符号を付して説明を省略し、実施の形態１～３との相違点を中心に説明する。 Embodiment 4 FIG.
FIG. 6 is a block diagram showing the control unit 330 of the air-conditioning apparatus 300 according to Embodiment 4 of the present invention. The fourth embodiment is different from the first embodiment in that the control unit 330 includes a signal determination unit 335. In the fourth embodiment, the same parts as those in the first to third embodiments are denoted by the same reference numerals, and the description thereof will be omitted. The description will focus on the differences from the first to third embodiments.
　図６に示すように、制御部３３０は、信号判断手段３３５を有している。信号判断手段３３５は、リモートコントローラ４から停止信号を受信した場合、除霜運転の開始を許可し、リモートコントローラ４から停止信号を受信していない場合、暖房運転を継続するものである。なお、本実施の形態４において、除霜運転の開始条件は、運転情報である室外温度検出部２１によって検出された温度に基づいて変更されるものであり、人体検出部２４の検出結果に基づいて変更されるものではない。 As shown in FIG. 6, the control unit 330 has signal determination means 335. The signal determination means 335 permits the start of the defrosting operation when the stop signal is received from the remote controller 4, and continues the heating operation when the stop signal is not received from the remote controller 4. In the fourth embodiment, the start condition of the defrosting operation is changed based on the temperature detected by the outdoor temperature detection unit 21 that is operation information, and is based on the detection result of the human body detection unit 24. Will not be changed.
　本実施の形態４では、除霜運転の開始条件が変更された場合において、除霜運転の開始条件が満たされた場合でも、除霜運転が待機状態とされる。そして、信号判断手段３３５によって、停止信号が受信された場合に、除霜運転の待機状態が解除され、空気調和装置３００の運転が停止する前に、除霜運転が開始される。一方、信号判断手段３３５によって、停止信号が受信されていない場合には、除霜運転の待機状態が維持され、そのまま、空気調和装置３００の運転が停止する。 In the fourth embodiment, when the defrosting operation start condition is changed, even if the defrosting operation start condition is satisfied, the defrosting operation is set to the standby state. And when the stop signal is received by the signal determination means 335, the defrost operation standby state is canceled, and before the operation of the air conditioning apparatus 300 is stopped, the defrost operation is started. On the other hand, when the stop signal is not received by the signal determination unit 335, the standby state of the defrosting operation is maintained, and the operation of the air conditioner 300 is stopped as it is.
　図７は、本発明の実施の形態４に係る空気調和装置３００の動作を示すフローチャートである。次に、本実施の形態４に係る空気調和装置３００の制御部３３０の動作について説明する。図７に示すように、暖房運転が開始されると、室外熱交温度検出部２２によって検出された室外熱交換器８の温度が室外熱交温度閾値以下であるかが判断される（ステップＳＴ１１）。室外熱交換器８の温度が室外熱交温度閾値以下の場合（ステップＳＴ１１のＹｅｓ）、切替手段３４によって、流路切替部７が切り替えられ、除霜運転が開始される。 FIG. 7 is a flowchart showing the operation of the air-conditioning apparatus 300 according to Embodiment 4 of the present invention. Next, operation | movement of the control part 330 of the air conditioning apparatus 300 which concerns on this Embodiment 4 is demonstrated. As shown in FIG. 7, when the heating operation is started, it is determined whether the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detection unit 22 is equal to or lower than the outdoor heat exchanger temperature threshold (step ST11). ). When the temperature of the outdoor heat exchanger 8 is equal to or lower than the outdoor heat exchange temperature threshold (Yes in step ST11), the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started.
　一方、室外熱交換器８の温度が室外熱交温度閾値より大きい場合（ステップＳＴ１１のＮｏ）、判定手段３２において、室外温度検出部２１によって検出された温度が、室外温度閾値以下であるか否かが判定される（ステップＳＴ１２）。室外温度検出部２１によって検出された温度が室外温度閾値より大きい場合（ステップＳＴ１２のＮｏ）、信号判断手段３３５によって、リモートコントローラ４から停止信号を受信したか否かが判断される（ステップＳＴ１３）。停止信号が受信された場合（ステップＳＴ１３のＹｅｓ）、空気調和装置３００の運転が停止する。これは、室外の温度が高いため、室外熱交換器８が着霜していないと推測されることによる。停止信号が受信されていない場合（ステップＳＴ１３のＮｏ）、ステップＳＴ１１に戻る。 On the other hand, when the temperature of the outdoor heat exchanger 8 is larger than the outdoor heat exchanger temperature threshold (No in step ST11), whether or not the temperature detected by the outdoor temperature detector 21 in the determination unit 32 is equal to or lower than the outdoor temperature threshold. Is determined (step ST12). When the temperature detected by the outdoor temperature detector 21 is larger than the outdoor temperature threshold (No in step ST12), the signal determination unit 335 determines whether a stop signal is received from the remote controller 4 (step ST13). . When the stop signal is received (Yes in step ST13), the operation of the air conditioner 300 is stopped. This is because it is estimated that the outdoor heat exchanger 8 is not frosted because the outdoor temperature is high. When the stop signal has not been received (No in step ST13), the process returns to step ST11.
　ステップＳＴ１２において、室外温度検出部２１によって検出された温度が室外温度閾値以下の場合（ステップＳＴ１２のＹｅｓ）、変更手段３３によって、室外熱交温度閾値が、室外熱交温度閾値よりも高い室外熱交温度緩和閾値に変更され、室外熱交温度検出部２２によって検出された室外熱交換器８の温度が室外熱交温度緩和閾値以下であるかが判断される（ステップＳＴ１４）。室外熱交換器８の温度が室外熱交温度緩和閾値以下の場合（ステップＳＴ１４のＹｅｓ）、信号判断手段３３５によって、リモートコントローラ４から停止信号を受信したか否かが判断される（ステップＳＴ１５）。停止信号が受信された場合（ステップＳＴ１５のＹｅｓ）、切替手段３４によって、流路切替部７が切り替えられ、除霜運転が開始される。その後、空気調和装置３００の運転が停止する。停止信号が受信されていない場合（ステップＳＴ１５のＮｏ）、ステップＳＴ１１に戻る。これは、室外の温度が低いため、室外熱交換器８が着霜している可能性があると推測されることによる。 In step ST12, when the temperature detected by the outdoor temperature detection unit 21 is equal to or lower than the outdoor temperature threshold (Yes in step ST12), the outdoor heat exchange temperature threshold is higher than the outdoor heat exchange temperature threshold by the changing unit 33. It is determined whether the temperature of the outdoor heat exchanger 8 that has been changed to the AC temperature relaxation threshold and detected by the outdoor heat exchanger temperature detector 22 is equal to or lower than the outdoor heat exchanger temperature relaxation threshold (step ST14). When the temperature of the outdoor heat exchanger 8 is equal to or less than the outdoor heat exchanger temperature relaxation threshold (Yes in step ST14), the signal determination unit 335 determines whether a stop signal is received from the remote controller 4 (step ST15). . When the stop signal is received (Yes in step ST15), the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started. Thereafter, the operation of the air conditioner 300 stops. When the stop signal has not been received (No in step ST15), the process returns to step ST11. This is because the outdoor heat exchanger 8 is presumed to be frosted because the outdoor temperature is low.
　一方、室外熱交換器８の温度が室外熱交温度緩和閾値より大きい場合（ステップＳＴ１４のＮｏ）、信号判断手段３３５によって、リモートコントローラ４から停止信号を受信したか否かが判断される（ステップＳＴ１６）。停止信号が受信された場合（ステップＳＴ１６のＹｅｓ）、空気調和装置３００の運転が停止する。停止信号が受信されていない場合（ステップＳＴ１６のＮｏ）、ステップＳＴ１１に戻る。これは、室外の温度が低いため、室外熱交換器８が着霜している可能性があると推測されるものの、停止信号が受信されていないため、使用者が暖房運転を求めていると推測されることによる。 On the other hand, when the temperature of the outdoor heat exchanger 8 is higher than the outdoor heat exchanger temperature relaxation threshold (No in step ST14), the signal determination unit 335 determines whether a stop signal has been received from the remote controller 4 (step S14). ST16). When the stop signal is received (Yes in step ST16), the operation of the air conditioner 300 is stopped. When the stop signal has not been received (No in step ST16), the process returns to step ST11. This is because the outdoor heat exchanger 8 is presumed to be frosted because the outdoor temperature is low, but since the stop signal has not been received, the user seeks the heating operation. By guessing.
　本実施の形態４によれば、冷媒回路５の運転を停止する停止信号を送信するリモートコントローラ４を更に備え、制御部３３０は、リモートコントローラ４から停止信号を受信した場合、除霜運転の開始を許可する信号判断手段３３５を更に有し、切替手段３４は、信号判断手段３３５において除霜運転の開始が許可された場合、除霜運転が開始されるように流路切替部７を切り替えるものである。これにより、使用者が暖房運転を不要としているときに、積極的に除霜運転が行われるため、再度暖房運転が必要となった場合の暖房能力を確保することができる。従って、実施の形態１で得られる効果に加え、更に、使用者の快適性を向上させることができる。 According to the fourth embodiment, the remote controller 4 that further transmits a stop signal for stopping the operation of the refrigerant circuit 5 is further provided. When the control unit 330 receives the stop signal from the remote controller 4, the defrosting operation starts. Is further included, and the switching unit 34 switches the flow path switching unit 7 so that the defrosting operation is started when the signal determining unit 335 permits the start of the defrosting operation. It is. Thereby, when the user does not need the heating operation, the defrosting operation is actively performed, so that the heating capacity when the heating operation is necessary again can be ensured. Therefore, in addition to the effects obtained in the first embodiment, the user's comfort can be further improved.
　なお、本実施の形態４においても、実施の形態１のように、除霜運転の開始条件の変更は、運転情報に基づくだけでなく、人体検出部２４の検出結果に基づくものであってもよい。また、本実施の形態４においても、実施の形態２のように、運転情報を圧縮機６の運転周波数としてもよく、実施の形態３のように、運転情報を除霜運転の運転時間としてもよい。 In the fourth embodiment, as in the first embodiment, the change in the defrosting operation start condition is not only based on the operation information, but also based on the detection result of the human body detection unit 24. Good. Also in the fourth embodiment, the operation information may be the operation frequency of the compressor 6 as in the second embodiment, and the operation information may be the operation time of the defrosting operation as in the third embodiment. Good.
実施の形態５．
　図８は、本発明の実施の形態５に係る空気調和装置４００の制御部４３０を示すブロック図である。本実施の形態５は、信号判断手段４３５が、サーモオフ信号を受信したか否かにおいて、除霜運転の許可を判断している点で、実施の形態４と相違する。本実施の形態５では、実施の形態１～４と同一の部分は同一の符号を付して説明を省略し、実施の形態１～４との相違点を中心に説明する。 Embodiment 5 FIG.
FIG. 8 is a block diagram showing control unit 430 of air-conditioning apparatus 400 according to Embodiment 5 of the present invention. The fifth embodiment is different from the fourth embodiment in that the signal determining means 435 determines permission of the defrosting operation based on whether or not the thermo-off signal is received. In the fifth embodiment, the same parts as those in the first to fourth embodiments are denoted by the same reference numerals, and the description thereof will be omitted. The description will focus on the differences from the first to fourth embodiments.
　図８に示すように、制御部４３０は、信号判断手段４３５を有している。信号判断手段４３５は、室内機３からサーモオフ信号を受信した場合、除霜運転の開始を許可し、サーモオフ信号を受信していない場合、暖房運転を継続するものである。なお、本実施の形態５において、除霜運転の開始条件は、運転情報である室外温度検出部２１によって検出された温度に基づいて変更されるものであり、人体検出部２４の検出結果に基づいて変更されるものではない。 As shown in FIG. 8, the control unit 430 has signal determination means 435. The signal determination means 435 permits the start of the defrosting operation when the thermo-off signal is received from the indoor unit 3, and continues the heating operation when the thermo-off signal is not received. In the fifth embodiment, the start condition of the defrosting operation is changed based on the temperature detected by the outdoor temperature detection unit 21 that is operation information, and is based on the detection result of the human body detection unit 24. Will not be changed.
　本実施の形態５では、除霜運転の開始条件が変更された場合において、除霜運転の開始条件が満たされた場合でも、除霜運転が待機状態とされる。そして、信号判断手段４３５によって、サーモオフ信号が受信された場合に、除霜運転の待機状態が解除され、空気調和装置４００の運転が停止する前に、除霜運転が開始される。一方、信号判断手段４３５によって、サーモオフ信号が受信されていない場合には、除霜運転の待機状態が維持され、そのまま、空気調和装置４００の運転が停止する。 In the fifth embodiment, when the defrosting operation start condition is changed, even when the defrosting operation start condition is satisfied, the defrosting operation is set to the standby state. Then, when a thermo-off signal is received by the signal determination unit 435, the defrosting operation standby state is canceled, and before the operation of the air conditioning apparatus 400 is stopped, the defrosting operation is started. On the other hand, when the thermo-off signal is not received by the signal determination unit 435, the standby state of the defrosting operation is maintained, and the operation of the air conditioner 400 is stopped as it is.
　図９は、本発明の実施の形態５に係る空気調和装置４００の動作を示すフローチャートである。次に、本実施の形態５に係る空気調和装置４００の制御部４３０の動作について説明する。図９に示すように、暖房運転が開始されると、室外熱交温度検出部２２によって検出された室外熱交換器８の温度が室外熱交温度閾値以下であるかが判断される（ステップＳＴ２１）。室外熱交換器８の温度が室外熱交温度閾値以下の場合（ステップＳＴ２１のＹｅｓ）、切替手段３４によって、流路切替部７が切り替えられ、除霜運転が開始される。 FIG. 9 is a flowchart showing the operation of the air-conditioning apparatus 400 according to Embodiment 5 of the present invention. Next, operation | movement of the control part 430 of the air conditioning apparatus 400 which concerns on this Embodiment 5 is demonstrated. As shown in FIG. 9, when the heating operation is started, it is determined whether or not the temperature of the outdoor heat exchanger 8 detected by the outdoor heat exchanger temperature detection unit 22 is equal to or lower than the outdoor heat exchanger temperature threshold (step ST21). ). When the temperature of the outdoor heat exchanger 8 is equal to or lower than the outdoor heat exchange temperature threshold (Yes in step ST21), the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started.
　一方、室外熱交換器８の温度が室外熱交温度閾値より大きい場合（ステップＳＴ２１のＮｏ）、判定手段３２において、室外温度検出部２１によって検出された温度が、室外温度閾値以下であるか否かが判定される（ステップＳＴ２２）。室外温度検出部２１によって検出された温度が室外温度閾値より大きい場合（ステップＳＴ２２のＮｏ）、信号判断手段４３５によって、室内機３からサーモオフ信号を受信したか否かが判断される（ステップＳＴ２３）。サーモオフ信号が受信された場合（ステップＳＴ２３のＹｅｓ）、室外機２及び室内機３の運転が停止する。これは、室外の温度が高いため、室外熱交換器８が着霜していないと推測されることによる。サーモオフ信号が受信されていない場合（ステップＳＴ２３のＮｏ）、ステップＳＴ２１に戻る。 On the other hand, when the temperature of the outdoor heat exchanger 8 is higher than the outdoor heat exchange temperature threshold (No in step ST21), whether or not the temperature detected by the outdoor temperature detector 21 in the determination unit 32 is equal to or lower than the outdoor temperature threshold. Is determined (step ST22). When the temperature detected by the outdoor temperature detection unit 21 is larger than the outdoor temperature threshold (No in step ST22), the signal determination unit 435 determines whether a thermo-off signal is received from the indoor unit 3 (step ST23). . When the thermo-off signal is received (Yes in step ST23), the operation of the outdoor unit 2 and the indoor unit 3 is stopped. This is because it is estimated that the outdoor heat exchanger 8 is not frosted because the outdoor temperature is high. When the thermo-off signal is not received (No in step ST23), the process returns to step ST21.
　ステップＳＴ２２において、室外温度検出部２１によって検出された温度が室外温度閾値以下の場合（ステップＳＴ２２のＹｅｓ）、変更手段３３によって、室外熱交温度閾値が、室外熱交温度閾値よりも高い室外熱交温度緩和閾値に変更され、室外熱交温度検出部２２によって検出された室外熱交換器８の温度が室外熱交温度緩和閾値以下であるかが判断される（ステップＳＴ２４）。室外熱交換器８の温度が室外熱交温度緩和閾値以下の場合（ステップＳＴ２４のＹｅｓ）、信号判断手段４３５によって、室内機３からサーモオフ信号を受信したか否かが判断される（ステップＳＴ２５）。サーモオフ信号が受信された場合（ステップＳＴ２５のＹｅｓ）、切替手段３４によって、流路切替部７が切り替えられ、除霜運転が開始される。その後、室外機２及び室内機３の運転が停止する。サーモオフ信号が受信されていない場合（ステップＳＴ２５のＮｏ）、ステップＳＴ２１に戻る。これは、室外の温度が低いため、室外熱交換器８が着霜している可能性があると推測されることによる。 In step ST22, when the temperature detected by the outdoor temperature detection unit 21 is equal to or less than the outdoor temperature threshold (Yes in step ST22), the outdoor heat exchange temperature threshold is higher than the outdoor heat exchange temperature threshold by the changing unit 33. Whether the temperature of the outdoor heat exchanger 8 is changed to the AC temperature relaxation threshold and detected by the outdoor heat exchanger temperature detection unit 22 is determined to be equal to or lower than the outdoor heat exchanger temperature relaxation threshold (step ST24). When the temperature of the outdoor heat exchanger 8 is equal to or less than the outdoor heat exchanger temperature relaxation threshold (Yes in step ST24), the signal determination unit 435 determines whether a thermo-off signal has been received from the indoor unit 3 (step ST25). . When the thermo-off signal is received (Yes in step ST25), the flow switching unit 7 is switched by the switching unit 34, and the defrosting operation is started. Thereafter, the operation of the outdoor unit 2 and the indoor unit 3 is stopped. When the thermo-off signal is not received (No in step ST25), the process returns to step ST21. This is because the outdoor heat exchanger 8 is presumed to be frosted because the outdoor temperature is low.
　一方、室外熱交換器８の温度が室外熱交温度緩和閾値より大きい場合（ステップＳＴ２４のＮｏ）、信号判断手段４３５によって、室内機３からサーモオフ信号を受信したか否かが判断される（ステップＳＴ２６）。サーモオフ信号が受信された場合（ステップＳＴ２６のＹｅｓ）、室外機２及び室内機３の運転が停止する。サーモオフ信号が受信されていない場合（ステップＳＴ２６のＮｏ）、ステップＳＴ２１に戻る。これは、室外の温度が低いため、室外熱交換器８が着霜している可能性があると推測されるものの、サーモオフ信号が受信されていないため、引き続き暖房運転が必要と推測されることによる。 On the other hand, when the temperature of the outdoor heat exchanger 8 is higher than the outdoor heat exchanger temperature relaxation threshold (No in step ST24), it is determined by the signal determining means 435 whether a thermo-off signal has been received from the indoor unit 3 (step). ST26). When the thermo-off signal is received (Yes in step ST26), the operation of the outdoor unit 2 and the indoor unit 3 is stopped. When the thermo-off signal is not received (No in step ST26), the process returns to step ST21. Although it is estimated that the outdoor heat exchanger 8 may be frosted because the outdoor temperature is low, it is presumed that the heating operation is necessary because the thermo-off signal is not received. by.
　本実施の形態５によれば、制御部４３０は、実際の室温が設定温度より高い場合に一旦停止するサーモオフのサーモオフ信号を受信した場合、前記除霜運転の開始を許可する信号判断手段４３５を更に有し、切替手段３４は、信号判断手段４３５において除霜運転の開始が許可された場合、除霜運転が開始されるように流路切替部７を切り替えるものである。これにより、暖房運転が不要であるときに積極的に除霜運転が行われるため、サーモオンによって暖房運転が再開された場合の暖房能力を確保することができる。従って、実施の形態１で得られる効果に加え、更に、使用者の快適性を向上させることができる。 According to the fifth embodiment, when the controller 430 receives a thermo-off thermo-off signal that temporarily stops when the actual room temperature is higher than the set temperature, the signal determination unit 435 permits the start of the defrosting operation. Further, the switching unit 34 switches the flow path switching unit 7 so that the defrosting operation is started when the signal determination unit 435 permits the start of the defrosting operation. Thereby, since the defrosting operation is actively performed when the heating operation is unnecessary, it is possible to secure the heating capacity when the heating operation is restarted by the thermo-on. Therefore, in addition to the effects obtained in the first embodiment, the user's comfort can be further improved.
　なお、本実施の形態５においても、実施の形態１のように、除霜運転の開始条件の変更は、運転情報に基づくだけでなく、人体検出部２４の検出結果に基づくものであってもよい。また、本実施の形態５においても、実施の形態２のように、運転情報を圧縮機６の運転周波数としてもよく、実施の形態３のように、運転情報を除霜運転の運転時間としてもよい。 Even in the fifth embodiment, as in the first embodiment, the change in the defrosting operation start condition is not only based on the operation information, but also based on the detection result of the human body detection unit 24. Good. Also in the fifth embodiment, the operation information may be the operation frequency of the compressor 6 as in the second embodiment, and the operation information may be the operation time of the defrosting operation as in the third embodiment. Good.
　１　空気調和装置、２　室外機、３　室内機、４　リモートコントローラ、４ａ　リモコン線、５　冷媒回路、６　圧縮機、７　流路切替部、８　室外熱交換器、８ａ　室外送風機、９　膨張部、１０　室内熱交換器、１０ａ　室内送風機、２１　室外温度検出部、２２　室外熱交温度検出部、２３　室内温度検出部、２４　人体検出部、３０　制御部、３０ａ　室外制御基板、３０ｂ　室内制御基板、３０ｃ　内外通信線、３１　記憶手段、３２　判定手段、３３　変更手段、３４　切替手段、１００　空気調和装置、１２５　周波数検出部、１３０　制御部、１３２　判定手段、１３３　変更手段、２００　空気調和装置、２２６　時間計測部、２３０　制御部、２３２　判定手段、２３３　変更手段、３００　空気調和装置、３３０　制御部、３３５　信号判断手段、４００　空気調和装置、４３０　制御部、４３５　信号判断手段。 1 air conditioner, 2 outdoor unit, 3 indoor unit, 4 remote controller, 4a remote control line, 5 refrigerant circuit, 6 compressor, 7 flow switching unit, 8 outdoor heat exchanger, 8a outdoor blower, 9 expansion unit, 10 Indoor heat exchanger, 10a indoor fan, 21 outdoor temperature detector, 22 outdoor heat exchanger temperature detector, 23 indoor temperature detector, 24 human body detector, 30 controller, 30a outdoor control board, 30b indoor control board, 30c inside and outside Communication line, 31 storage means, 32 determination means, 33 change means, 34 switching means, 100 air conditioner, 125 frequency detection part, 130 control part, 132 determination means, 133 change means, 200 air conditioner, 226 time measurement part , 230 control unit, 232 determination means, 233 change means, 300 air conditioner, 330 Control unit, 335 signal judging means, 400 air conditioner, 430 control unit, 435 signal determination means.

Claims (8)

  1. 　圧縮機、流路切替部、室外熱交換器、膨張部及び室内熱交換器が配管により接続され、冷媒が流れる冷媒回路と、
    　暖房運転と除霜運転とを切り替えるように前記冷媒回路の動作を制御する制御部と、を備え、
    　前記制御部は、
    　前記暖房運転が実施されている場合、前記冷媒回路の運転情報に基づいて、前記除霜運転の開始条件の変更の要否を判定する判定手段と、
    　前記判定手段の判定結果に基づいて、前記除霜運転の開始条件を変更する変更手段と、
    　前記除霜運転の開始条件が満たされた場合、前記除霜運転が開始されるように前記流路切替部を切り替える切替手段と、を有する
    　空気調和装置。     A refrigerant circuit in which a compressor, a flow path switching unit, an outdoor heat exchanger, an expansion unit, and an indoor heat exchanger are connected by piping, and a refrigerant flows;
    A controller that controls the operation of the refrigerant circuit so as to switch between heating operation and defrosting operation,
    The controller is
    When the heating operation is being carried out, based on the operation information of the refrigerant circuit, determination means for determining whether or not it is necessary to change the start condition of the defrost operation;
    Based on the determination result of the determination means, changing means for changing the start condition of the defrosting operation;
    An air conditioner comprising: switching means for switching the flow path switching unit so that the defrosting operation is started when the defrosting operation start condition is satisfied.
  2. 　人体の有無を検出する人体検出部を更に備え、
    　前記変更手段は、
    　前記判定手段の判定結果に基づくと共に前記人体検出部の検出結果に基づいて、前記除霜運転の開始条件を変更するものである
    　請求項１記載の空気調和装置。     A human body detection unit for detecting the presence or absence of a human body;
    The changing means is
    The air conditioning apparatus according to claim 1, wherein the start condition of the defrosting operation is changed based on the determination result of the determination means and based on the detection result of the human body detection unit.
  3. 　前記冷媒回路の運転を停止する停止信号を送信するリモートコントローラを更に備え、
    　前記制御部は、
    　前記リモートコントローラから前記停止信号を受信した場合、前記除霜運転の開始を許可する信号判断手段を更に有し、
    　前記切替手段は、
    　前記信号判断手段において前記除霜運転の開始が許可された場合、前記除霜運転が開始されるように前記流路切替部を切り替えるものである
    　請求項１記載の空気調和装置。     A remote controller for transmitting a stop signal for stopping the operation of the refrigerant circuit;
    The controller is
    When the stop signal is received from the remote controller, further comprising a signal determination means for permitting the start of the defrosting operation,
    The switching means is
    The air conditioning apparatus according to claim 1, wherein when the signal determination means permits the start of the defrosting operation, the flow path switching unit is switched so that the defrosting operation is started.
  4. 　前記制御部は、
    　実際の室温が設定温度より高い場合に一旦停止するサーモオフのサーモオフ信号を受信した場合、前記除霜運転の開始を許可する信号判断手段を更に有し、
    　前記切替手段は、
    　前記信号判断手段において前記除霜運転の開始が許可された場合、前記除霜運転が開始されるように前記流路切替部を切り替えるものである
    　請求項１記載の空気調和装置。     The controller is
    When receiving a thermo-off signal of a thermo-off that temporarily stops when the actual room temperature is higher than the set temperature, it further has a signal determination means that permits the start of the defrosting operation,
    The switching means is
    The air conditioning apparatus according to claim 1, wherein when the signal determination means permits the start of the defrosting operation, the flow path switching unit is switched so that the defrosting operation is started.
  5. 　前記室外熱交換器の温度を検出する室外熱交温度検出部を更に備え、
    　前記除霜運転の開始条件は、
    　前記室外熱交温度検出部によって検出された温度が室外熱交温度閾値以下であることであり、
    　前記変更手段は、
    　前記暖房運転が実施されている場合、前記冷媒回路の運転情報に基づいて、前記室外熱交温度閾値を、前記室外熱交温度閾値よりも高い室外熱交温度緩和閾値に変更するものである
    　請求項１～４のいずれか１項に記載の空気調和装置。     Further comprising an outdoor heat exchanger temperature detection unit for detecting the temperature of the outdoor heat exchanger,
    The start condition of the defrosting operation is
    The temperature detected by the outdoor heat exchange temperature detector is below the outdoor heat exchange temperature threshold,
    The changing means is
    When the heating operation is performed, the outdoor heat exchange temperature threshold value is changed to an outdoor heat exchange temperature relaxation threshold value higher than the outdoor heat exchange temperature threshold value based on operation information of the refrigerant circuit. Item 5. The air conditioner according to any one of Items 1 to 4.
  6. 　室外の温度を検出する室外温度検出部を更に備え、
    　前記運転情報は、
    　前記室外温度検出部によって検出された温度であり、
    　前記判定手段は、
    　前記室外温度検出部によって検出された温度が室外温度閾値以下であるか否かを判定するものであり、
    　前記変更手段は、
    　前記判定手段において、前記室外温度検出部によって検出された温度が室外温度閾値以下と判定された場合、前記除霜運転の開始条件を変更するものである
    　請求項１～５のいずれか１項に記載の空気調和装置。     It further includes an outdoor temperature detector for detecting the outdoor temperature,
    The driving information is
    A temperature detected by the outdoor temperature detector;
    The determination means includes
    It is determined whether the temperature detected by the outdoor temperature detection unit is an outdoor temperature threshold value or less,
    The changing means is
    The start condition of the defrosting operation is changed when the determination unit determines that the temperature detected by the outdoor temperature detection unit is equal to or lower than an outdoor temperature threshold value. The air conditioning apparatus described.
  7. 　前記圧縮機の運転周波数を検出する周波数検出部を更に備え、
    　前記運転情報は、
    　前記周波数検出部によって検出された運転周波数であり、
    　前記判定手段は、
    　前記周波数検出部によって検出された運転周波数が周波数閾値以上であるか否かを判定するものであり、
    　前記変更手段は、
    　前記判定手段において、前記周波数検出部によって検出された運転周波数が周波数閾値以上と判定された場合、前記除霜運転の開始条件を変更するものである
    　請求項１～５のいずれか１項に記載の空気調和装置。     A frequency detector for detecting an operating frequency of the compressor;
    The driving information is
    The operating frequency detected by the frequency detection unit,
    The determination means includes
    It is to determine whether the operating frequency detected by the frequency detection unit is equal to or higher than a frequency threshold,
    The changing means is
    The start condition of the defrosting operation is changed when the determination unit determines that the operation frequency detected by the frequency detection unit is equal to or higher than a frequency threshold value. Air conditioner.
  8. 　前記除霜運転の運転時間を計測する時間計測部を更に備え、
    　前記運転情報は、
    　前記時間計測部によって計測された運転時間であり、
    　前記判定手段は、
    　前記時間計測部によって計測された前回の除霜運転の運転時間が時間閾値以上であるか否かを判定するものであり、
    　前記判定手段において、前記時間計測部によって計測された前回の除霜運転の運転時間が時間閾値以上と判定された場合、前記除霜運転の開始条件を変更するものである
    　請求項１～５のいずれか１項に記載の空気調和装置。     A time measuring unit for measuring the operating time of the defrosting operation;
    The driving information is
    It is the operation time measured by the time measuring unit,
    The determination means includes
    It is determined whether the operation time of the previous defrost operation measured by the time measurement unit is equal to or greater than a time threshold value,
    The start condition of the defrosting operation is changed when the determination means determines that the operation time of the previous defrosting operation measured by the time measuring unit is equal to or more than a time threshold value. The air conditioning apparatus of any one of Claims.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE1751286A1 (en) * 2017-10-17 2019-04-18 Swegon Operations Ab Defrosting cycle control
WO2019078771A1 (en) * 2017-10-17 2019-04-25 Swegon Operations Ab An air handling unit for a ventilation system in a building and a method for performing a defrosting operation of an air handling unit
JPWO2020240685A1 (en) * 2019-05-28 2020-12-03
EP3617028A4 (en) * 2017-12-27 2021-01-20 CRRC Changchun Railway Vehicles Co., Ltd. Rail train and air conditioning control system thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109458698A (en) * 2018-11-08 2019-03-12 珠海格力电器股份有限公司 Air-conditioning defrosting method and air-conditioning
CN110173824B (en) * 2019-05-31 2021-05-18 广东美的制冷设备有限公司 Operation control method, control device, air conditioner, and computer-readable storage medium
CN112665116B (en) * 2019-10-16 2022-04-12 广东美的制冷设备有限公司 Multi-online defrosting method and device, multi-online air conditioning system and readable storage medium
DE102020122996A1 (en) * 2020-09-03 2022-03-03 Vaillant Gmbh Method for defrosting a component exposed to the ambient air and devices for carrying out the method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61276648A (en) * 1985-05-29 1986-12-06 Daikin Ind Ltd Heat pump type air conditioner
JPH0231300B2 (en) * 1985-09-30 1990-07-12 Daikin Ind Ltd
JPH07104082B2 (en) * 1986-07-24 1995-11-13 ダイキン工業株式会社 Heat pump system
JP2012047423A (en) * 2010-08-30 2012-03-08 Fujitsu General Ltd Air conditioner
JP2013130341A (en) * 2011-12-22 2013-07-04 Daikin Industries Ltd Air conditioner
JP2015183873A (en) * 2014-03-20 2015-10-22 日立アプライアンス株式会社 air conditioner

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5276630A (en) * 1990-07-23 1994-01-04 American Standard Inc. Self configuring controller
JP3378724B2 (en) * 1996-04-09 2003-02-17 三洋電機株式会社 Defrosting control method for air conditioner
US6260365B1 (en) * 2000-01-07 2001-07-17 Traulsen & Company, Inc. Control system and related methods for refrigeration and freezer units
SE516845C2 (en) * 2000-07-10 2002-03-12 Volvo Teknisk Utveckling Ab Anordning och metod för automatisk defroster i bilar
CA2419647A1 (en) * 2003-02-21 2004-08-21 Jean-Pierre Gingras Walk-in cooler control and monitoring system
US8136363B2 (en) * 2005-04-15 2012-03-20 Thermo King Corporation Temperature control system and method of operating the same
US7895845B2 (en) * 2006-12-28 2011-03-01 Steve Every Adaptive defrost control for frozen product dispensers
CN101532705B (en) * 2009-04-21 2011-03-16 海信（山东）空调有限公司 Defrosting method of cold and warm type frequency conversion air conditioner
JP2011185535A (en) * 2010-03-09 2011-09-22 Panasonic Corp Air conditioner
EP2588819B1 (en) * 2010-07-01 2019-12-11 Carrier Corporation Evaporator refrigerant saturation demand defrost
JP5210364B2 (en) * 2010-09-09 2013-06-12 パナソニック株式会社 Air conditioner
US8739563B2 (en) * 2011-04-21 2014-06-03 Hamilton Sundstrand Corporation Adaptable evaporator defrost logic for an aircraft
JP6073652B2 (en) * 2012-11-09 2017-02-01 サンデンホールディングス株式会社 Air conditioner for vehicles
US9719715B2 (en) * 2013-09-27 2017-08-01 Lennox Industries Inc. Using weather data in heat pump defrost control
JP5999171B2 (en) * 2014-12-26 2016-09-28 ダイキン工業株式会社 Air conditioner
CN104833060B (en) * 2015-05-22 2017-10-31 广东美的暖通设备有限公司 the defrosting control method and defrosting control device of air conditioner
JP6119811B2 (en) * 2015-08-18 2017-04-26 ダイキン工業株式会社 Refrigeration equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61276648A (en) * 1985-05-29 1986-12-06 Daikin Ind Ltd Heat pump type air conditioner
JPH0231300B2 (en) * 1985-09-30 1990-07-12 Daikin Ind Ltd
JPH07104082B2 (en) * 1986-07-24 1995-11-13 ダイキン工業株式会社 Heat pump system
JP2012047423A (en) * 2010-08-30 2012-03-08 Fujitsu General Ltd Air conditioner
JP2013130341A (en) * 2011-12-22 2013-07-04 Daikin Industries Ltd Air conditioner
JP2015183873A (en) * 2014-03-20 2015-10-22 日立アプライアンス株式会社 air conditioner

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE1751286A1 (en) * 2017-10-17 2019-04-18 Swegon Operations Ab Defrosting cycle control
WO2019078771A1 (en) * 2017-10-17 2019-04-25 Swegon Operations Ab An air handling unit for a ventilation system in a building and a method for performing a defrosting operation of an air handling unit
EP3698088A4 (en) * 2017-10-17 2021-07-21 Swegon Operations AB An air handling unit for a ventilation system in a building and a method for performing a defrosting operation of an air handling unit
US11486595B2 (en) 2017-10-17 2022-11-01 Swegon Operations Ab Defrosting cycle control
SE542349E (en) * 2017-10-17 2023-05-25 Swegon Operations Ab Method for defrosting of an Air Handling Unit
EP3617028A4 (en) * 2017-12-27 2021-01-20 CRRC Changchun Railway Vehicles Co., Ltd. Rail train and air conditioning control system thereof
JPWO2020240685A1 (en) * 2019-05-28 2020-12-03
WO2020240685A1 (en) * 2019-05-28 2020-12-03 三菱電機株式会社 Control device, air environment adjustment system, air environment adjustment method, program, and recording medium
JP7199529B2 (en) 2019-05-28 2023-01-05 三菱電機株式会社 Control device, air environment adjustment system, air environment adjustment method, program, and recording medium

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JP6611829B2 (en) 2019-11-27
US20180356138A1 (en) 2018-12-13
CN108603706B (en) 2021-03-23
EP3412992A4 (en) 2019-02-13
CN108603706A (en) 2018-09-28
JPWO2017134807A1 (en) 2018-09-13

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