EP2615388A1 - Klimaanlage - Google Patents

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Publication number
EP2615388A1
EP2615388A1 EP11823167.9A EP11823167A EP2615388A1 EP 2615388 A1 EP2615388 A1 EP 2615388A1 EP 11823167 A EP11823167 A EP 11823167A EP 2615388 A1 EP2615388 A1 EP 2615388A1
Authority
EP
European Patent Office
Prior art keywords
defrosting
heat exchanger
air conditioner
indoor
cycle
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP11823167.9A
Other languages
English (en)
French (fr)
Other versions
EP2615388B1 (de
EP2615388A4 (de
Inventor
Takashi Sugio
Masatoshi Takahashi
Daisuke Kawazoe
Kouji Oka
Noriaki Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Panasonic Corp
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 Panasonic Corp filed Critical Panasonic Corp
Publication of EP2615388A1 publication Critical patent/EP2615388A1/de
Publication of EP2615388A4 publication Critical patent/EP2615388A4/de
Application granted granted Critical
Publication of EP2615388B1 publication Critical patent/EP2615388B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • 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
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/24—Storage receiver heat
    • 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
    • F25B2700/2104—Temperatures of an indoor room or compartment

Definitions

  • the present invention relates to an air conditioner that includes an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, and a compressor and that is capable of melting frost deposited onto the outdoor heat exchanger.
  • a heat pump type air conditioner that performs defrosting by switching a four-way valve from heating cycle to cooling cycle when an outdoor heat exchanger is frosted in a heating operation.
  • This defrosting method has a defect in that users' sense of being heated is lost because cool air is gradually released from an indoor unit though an indoor fan is stopped. As an indoor heat exchanger is then cooled by the cooling cycle, it takes much time until heating capacity thereof is fully exercised after return from the cooling cycle to the heating cycle.
  • an air conditioner has been known that performs defrosting, while remaining in heating cycle, when an outdoor heat exchanger is frosted.
  • This defrosting method involving no loss of the sense of being heated, has a defect in that the defrosting takes much time because the outdoor heat exchanger is supplied with only a small quantity of heat.
  • the defrosting takes particularly much time under conditions of low temperature of outside air, low output of a compressor and/or the like.
  • an air conditioner disclosed in Patent Literature 1 has a bypass tube for directly supplying an outdoor heat exchanger with a portion of refrigerant, outputted from a compressor and having a high temperature, without passing it through an indoor heat exchanger when defrosting for the outdoor heat exchanger is performed.
  • both benefits and defects are caused whether the cooling cycle or the heating cycle is performed in the defrosting of the outdoor heat exchanger. That is, assignment of priority to the heating capacity causes decrease in capacity for the defrosting of the outdoor heat exchanger, while assignment of priority to the defrosting capacity causes decrease in the heating capacity. Accordingly, it is desired to more efficiently perform heating of inside of a room and the defrosting of the outdoor heat exchanger.
  • the invention has been made in consideration of such problems the prior arts have and an object of the invention to more efficiently perform heating of inside of a room and defrosting of an outdoor heat exchanger.
  • an air conditioner that includes an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, and a compressor and that performs defrosting by melting frost deposited on the outdoor heat exchanger by refrigerant heated by the compressor, the air conditioner having:
  • the heating of inside of the room and the defrosting of the outdoor heat exchanger can efficiently be performed by selection and performance of either the defrosting with the heating cycle or the defrosting with the cooling cycle on the basis of the indoor wall temperature.
  • the invention provides an air conditioner that includes an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, and a compressor and that performs defrosting by melting frost deposited on the outdoor heat exchanger by refrigerant heated by the compressor, the air conditioner having indoor wall temperature detecting means for detecting temperature of a wall in a room, and defrosting means for performing the defrosting by selecting either a heating cycle or a cooling cycle on the basis of the indoor wall temperature detected by the indoor wall temperature detecting means and controlling the four-way valve so as to allow the selected cycle to be performed, when it is determined that the defrosting is required.
  • heating of inside of the room and the defrosting of the outdoor heat exchanger can efficiently be performed by the selection and performance of either the defrosting with the heating cycle or the defrosting with the cooling cycle on the basis of the indoor wall temperature.
  • the defrosting means performs the defrosting with the cooling cycle on condition that the indoor wall temperature is higher than a specified temperature or performs the defrosting with the heating cycle on condition that the indoor wall temperature is lower than the specified temperature, when it is determined that the defrosting is required.
  • the air conditioner further has heating means for heating the outdoor heat exchanger in the defrosting with the heating cycle.
  • heating means for heating the outdoor heat exchanger in the defrosting with the heating cycle.
  • the air conditioner further has heat storage means for storing waste heat from the compressor and supplying the waste heat to the refrigerant in the defrosting with the heating cycle.
  • heat storage means for storing waste heat from the compressor and supplying the waste heat to the refrigerant in the defrosting with the heating cycle.
  • the air conditioner further has human detecting means for detecting whether any or no human beings exist in the room, and the defrosting means performs the defrosting with the heating cycle when the human detecting means detects any human beings or performs the defrosting with the cooling cycle when the human detecting means detects no human being.
  • Fig. 1 shows a configuration of an air conditioner including a refrigeration cycle device in accordance with an embodiment 1 of the invention, and the air conditioner is composed of an outdoor unit 2 and an indoor unit 4 that are connected to each other through refrigerant pipes.
  • a compressor 6, a four-way valve 8, a strainer 10, an expansion valve 12, and an outdoor heat exchanger 14 are provided in the outdoor unit 2
  • an indoor heat exchanger 16 is provided in the indoor unit 4, and those elements configure an refrigerating cycle by being connected to one another through refrigerant pipes.
  • the compressor 6 and the indoor heat exchanger 16 are connected through a refrigerant pipe 18 in which the four-way valve 8 is provided, and the indoor heat exchanger 16 and the expansion valve 12 are connected through a refrigerant pipe 20 in which the strainer 10 is provided.
  • the expansion valve 12 and the outdoor heat exchanger 14 are connected through a refrigerant pipe 22, and the outdoor heat exchanger 14 and the compressor 6 are connected through a refrigerant pipe 24.
  • the four-way valve 8 is placed in middle part of the refrigerant pipe 24, and an accumulator 26 for separation into liquid phase refrigerant and vapor phase refrigerant is provided in the refrigerant pipe 24 on refrigerant intake side of the compressor 6.
  • the compressor 6 and the refrigerant pipe 22 are connected through a refrigerant pipe 28, and the refrigerant pipe 28 is provided with a first solenoid valve 30.
  • a heat storage tank 32 is provided around the compressor 6, inside of the heat storage tank 32 is provided with a heat-storage heat exchanger 34 and is filled with latent heat storage material (e.g., ethylene glycol aqueous solution) 36 for heat exchange with the heat-storage heat exchanger 34, and a heat storage device is composed of the heat storage tank 32, the heat-storage heat exchanger 34, and the heat storage material 36.
  • the heat storage material 36 stores waste heat from the compressor 6.
  • the refrigerant pipe 20 and the heat-storage heat exchanger 34 are connected through a refrigerant pipe 38, the heat-storage heat exchanger 34 and the refrigerant pipe 24 are connected through a refrigerant pipe 40, and the refrigerant pipe 38 is provided with a second solenoid valve 42.
  • a blower fan (not shown), upper-lower vanes (not shown), and left-right vanes (not shown), in addition to the indoor heat exchanger 16, are provided in the indoor unit 4, and the indoor heat exchanger 16 performs heat exchange between indoor air taken by the blower fan into the indoor unit 4 and the refrigerant flowing in the indoor heat exchanger 16, so that the air heated by the heat exchange is blown into the room in a heating operation, or so that the air cooled by the heat exchange is blown into the room in a cooling operation.
  • the upper-lower vanes alter direction of the air, blown off from the indoor unit 4, to upper or lower direction as required and the left-right vanes alter the direction of the air, blown off from the indoor unit 4, to leftward or rightward direction as required.
  • an outdoor heat exchanger temperature sensor 44 for detecting temperature in the outdoor heat exchanger 14 is provided in the air conditioner in accordance with the embodiment.
  • the temperature in the outdoor heat exchanger 14 corresponds to quantity of frost deposited on the outdoor heat exchanger 14, and thus the frost (quantity of frost) deposited on the outdoor heat exchanger 14 can be detected on the basis of the temperature detected by the outdoor heat exchanger temperature sensor 44.
  • the outdoor heat exchanger temperature sensor 44 outputs a signal, corresponding to the detected temperature, to a control device for the air conditioner.
  • An indoor wall temperature sensor 46 for detecting temperature of a wall in the room and a motion sensor 48 for detecting presence of any human beings in the room are provided in the indoor unit 4.
  • the indoor wall temperature sensor 46 is a sensor that detects the temperature of the wall in the room where the indoor unit 4 is provided and may be an infrared sensor, for instance.
  • the indoor wall temperature sensor 46 outputs a signal, corresponding to the detected temperature, to the control device for the air conditioner.
  • a temperature sensor for detecting temperature of an intake port may be substituted for the indoor wall temperature sensor 46, on condition that the indoor wall temperature can accurately be reckoned from the temperature of the intake port of the indoor unit 4.
  • the motion sensor 48 is a sensor that detects the presence of any human beings (users) in the room and may be an infrared sensor, an ultrasonic sensor, an illuminance sensor or the like, for instance. Upon detection of the presence of any human beings in the room, the motion sensor 48 outputs a signal to the control device (not shown) for the air conditioner.
  • the control device for the air conditioner is configured so as to receive the signals outputted from the outdoor heat exchanger temperature sensor 44, the indoor wall temperature sensor 46, and the motion sensor 48 that have been described above, so as to control the compressor 6, the four-way valve 8, the expansion valve 12, the solenoid valves 30, 42, the blower fan, the upper-lower vanes, the left-right vanes and the like on the basis of the received signals, and so as to perform various operations.
  • the defrosting operation is an operation for melting frost that adheres onto the outdoor heat exchanger 14, and the control device for the air conditioner in accordance with the invention selects either the heating cycle or the cooling cycle according to conditions and performs the defrosting operation with the selected cycle.
  • the control device functions as defrosting means.
  • the defrosting operation in which the heating cycle is selected will be referred to as "heating cycle/defrosting operation”.
  • the defrosting operation with the selection of the cooling cycle will be referred to as "cooling cycle/defrosting operation”.
  • the selection of the cycle will be described later.
  • heating cycle refers to a cycle in which the refrigerant moves from the compressor 6 through the four-way valve 8 to the indoor heat exchanger 16, that is, a cycle in which heating is performed and the term “cooling cycle” refers to a cycle in which the refrigerant moves from the indoor heat exchanger 16 through the four-way valve 8 to the compressor 6, that is, a cycle in which cooling is performed.
  • the control device for the air conditioner exerts control for opening the first solenoid valve 30 and the second solenoid valve 42 and controls the four-way valve 8 so as to perform the heating cycle.
  • a portion of the vapor phase refrigerant outputted from a discharge port of the compressor 6 flows into the refrigerant pipe 18 and the remainder thereof flows into the refrigerant pipe 28.
  • both the first solenoid valve 30 and the second solenoid valve 42 are controlled so as to be closed.
  • the vapor phase refrigerant having entered the refrigerant pipe 18 from the compressor 6 passes through the four-way valve 8, reaches the indoor heat exchanger 16, and undergoes heat exchange therein with indoor air through the indoor heat exchanger 16.
  • the refrigerant condensed with heat thereof taken by the heat exchange flows in the refrigerant pipe 20, splits at between the indoor heat exchanger 16 and the strainer 10 in the refrigerant pipe 20, and flows into the refrigerant pipes 22 and 38.
  • the refrigerant flowing in the refrigerant pipe 38 passes through the second solenoid valve 42, enters the heat-storage heat exchanger 34, and assumes vapor phase by absorbing heat from the heat storage material 36 and being evaporated.
  • the refrigerant having vapor-phased passes through the refrigerant pipe 40, merges into the refrigerant flowing in the refrigerant pipe 24, and enters an intake port of the compressor 6 through the accumulator 26.
  • a part of the condensed refrigerant having split at between the indoor heat exchanger 16 and the strainer 10 in the refrigerant pipe 20 passes through the strainer 10 for preventing foreign matter from getting into the expansion valve 12, enters the expansion valve 12, and is expanded (decompressed).
  • the refrigerant decompressed by the expansion valve 12 passes through the refrigerant pipe 22, reaches the outdoor heat exchanger 14, and undergoes heat exchange therein with outside air.
  • the refrigerant having undergone the heat exchange in the outdoor heat exchanger 14 with the outside air flows through the refrigerant pipe 24, the four-way valve 8, and the accumulator 26 and enters the intake port of the compressor 6.
  • the strainer 10 is provided between a part of the refrigerant pipe 20 that bifurcates to the refrigerant pipe 38 and the expansion valve 12, whereas function of preventing foreign matter from getting into the expansion valve 12 can be maintained even if he strainer 10 is provided between the indoor heat exchanger 16 and the bifurcating part for the refrigerant pipe 38 in the refrigerant pipe 20.
  • the strainer 10 causes pressure loss and thus the former of above locations facilitates flow of the refrigerant toward the refrigerant pipe 38 in the bifurcating part of the refrigerant pipe 20 for the refrigerant pipe 38 and increases quantity of circulation through a bypass pipe system extending from the refrigerant pipe 38 through the heat-storage heat exchanger 34 to the refrigerant pipe 40.
  • large quantity of circulation through the heat-storage heat exchanger 34 create difficulty in an occurrence of a phenomenon that it become impossible to heat exchange in a latter half part of the heat-storage heat exchanger 34 due to the latter half part superheated. Consequently, In such conditions, there are advantages that sufficient quantity of the heat exchange in the heat-storage heat exchanger 34 and sufficient defrosting capacity are attained.
  • the heating cycle/defrosting operation is ended once the outdoor heat exchanger temperature sensor 44 detects a temperature (e.g., 8°C) which is higher than the defrosting requiring temperature and at which frost cannot exist.
  • the cooling cycle/defrosting operation Upon detection of the defrosting requiring temperature by the outdoor heat exchanger temperature sensor 44 and fulfillment of conditions (details thereof will be described later) for performance of the cooling cycle/defrosting operation, the cooling cycle/defrosting operation is started.
  • control device for the air conditioner exerts control for closing the first solenoid valve 30 and the second solenoid valve 42 and controls the four-way valve 8 so as to perform the cooling cycle.
  • the vapor phase refrigerant outputted from the discharge port of the compressor 6 flows through the refrigerant pipe 18, the four-way valve 8, and the refrigerant pipe 24 and enters the outdoor heat exchanger 14.
  • the vapor phase refrigerant condenses therein by frost taking heat thereof through the outdoor heat exchanger 14. The frost is melted by the heat.
  • the refrigerant having vapor-phased by taking the heat flows through the refrigerant pipe 18, the four-way valve 8, the refrigerant pipe 24, and the accumulator 26 and thus enters the intake port of the compressor 6.
  • the temperature of the outdoor heat exchanger 14 that was below the freezing point at start of the operation because of the deposition of the frost, is increased by the melting of the frost faster than with the heating cycle/defrosting operation, though the heating capacity is not exercised.
  • the cooling cycle/defrosting operation is ended once the outdoor heat exchanger temperature sensor 44 detects a temperature which is higher than the defrosting requiring temperature and at which frost cannot exist.
  • the control device for the air conditioner selects either the heating cycle/defrosting operation or the cooling cycle/defrosting operation in accordance with a flow chart shown in Fig. 4 .
  • a step S10 initially, the control device determines whether the defrosting of the outdoor heat exchanger 14 is required or not. Specifically, it is determined that the defrosting is required, if the temperature detected by the outdoor heat exchanger temperature sensor 44 as described above is lower than the defrosting requiring temperature. If the defrosting is required, the flow proceeds to a step S20. If not, the flow proceeds to RETURN and goes back to START.
  • a step S20 subsequently, the control device determines whether the indoor wall temperature detected by the indoor wall temperature sensor 46 is lower than a specified wall temperature or not.
  • the flow proceeds to a step S50 and the cooling cycle/defrosting operation is performed. If the indoor wall temperature is lower than the specified wall temperature, on the other hand, the flow proceeds to a step S30.
  • step S30 initially, the control device determines through the motion sensor 48 whether any or no human beings exist in the room.
  • the heating cycle/defrosting operation is required to be performed so that users' sense of being heated is not lost, when any human beings (users) exist in the room, or the cooling cycle/defrosting operation can be performed, when no human beings exist in the room.
  • the flow proceeds to a step S40 and the heating cycle/defrosting operation is performed. If no human beings exist in the room, on the other hand, the flow proceeds to the step S50 and the cooling cycle/defrosting operation is performed.
  • the heating cycle/defrosting operation and the cooling cycle/defrosting operation are ended once the temperature detected by the outdoor heat exchanger temperature sensor 44 exceeds the defrosting requiring temperature and reaches a temperature at which frost cannot exist.
  • the heating of inside of the room and the defrosting of the outdoor heat exchanger 14 can efficiently be performed by the selection and performance of either the heating cycle/defrosting operation or the cooling cycle/defrosting operation on the basis of the indoor wall temperature.
  • the defrosting with the cooling cycle is performed because a large quantity heat is not taken from the indoor air by the wall.
  • the indoor wall temperature is lower than the specified temperature, on the other hand, the defrosting is performed while decrease in the temperature in the room is suppressed by the performance of the defrosting with the heating cycle, because a large quantity of heat is taken from the indoor air by the wall.
  • Those operations make it possible to perform the defrosting of the outdoor heat exchanger 14 while suppressing the decrease in the temperature in the room, that is, while preventing loss of users' sense of being heated.
  • the heat storage device which composed of the heat storage tank 32, the heat-storage heat exchanger 34, and the heat storage material 36,stores waste heat from the compressor 6 and supplies the waste heat to the refrigerant.
  • the defrosting capacity is increased and the waste heat from the compressor 6 can effectively be utilized.
  • the air conditioner of the embodiment 1 has the heat storage device that makes use of the waste heat from the compressor and that is composed of the heat storage tank 32, the heat-storage heat exchanger 34, and the heat storage material 36, whereas the invention is not limited to the air conditioner having the heat storage device.
  • an air conditioner (embodiment 2 of the invention) shown in Fig. 5 is conceivable.
  • the heat storage tank 32, the heat-storage heat exchanger 34, the heat storage material 36, the refrigerant pipes 38, 40 and the second solenoid valve 42 are removed from the air conditioner shown in Fig. 1 , and a refrigerant pipe 50 is provided that connects a part of the refrigerant pipe 28, which positioned between the first electromagnetic sensor 30 and a part where the refrigerant pipes 28, 22 merge, with a part of the refrigerant pipe 24 positioned between the four-way valve 8 and the accumulator 26.
  • the first solenoid valve 30 is controlled so as to be opened and the four-way valve 8 is controlled so as to perform the heating cycle.
  • the first solenoid valve 30 is controlled so as to be closed.
  • Vapor phase refrigerant having entered the refrigerant pipe 18 from the compressor 6 passes through the four-way valve 8, reaches the indoor heat exchanger 16, and undergoes heat exchange therein with indoor air by the indoor heat exchanger 16.
  • the refrigerant condensed into liquid phase with heat thereof taken by the heat exchange enters the refrigerant pipe 20, passes through the strainer 10, and reaches the expansion valve 12.
  • the refrigerant decompressed by the expansion valve 12 passes through the refrigerant pipe 22 and enters the outdoor heat exchanger 14.
  • vapor phase refrigerant outputted from the discharge port of the compressor 6 and entering the refrigerant pipe 28 flows through the refrigerant pipe 28 and the first solenoid valve 30, a portion thereof flows toward the outdoor heat exchanger 14, and the remainder enters the refrigerant pipe 50.
  • the refrigerant flowing toward the outdoor heat exchanger 14 merges refrigerant flowing in the refrigerant pipe 22, enters the outdoor heat exchanger 14, and undergoes heat exchange with outside air.
  • the refrigerant having undergone the heat exchange in the outdoor heat exchanger 14 with the outside air flows through the refrigerant pipe 24, the four-way valve 8, and the accumulator 26 and enters the intake port of the compressor 6.
  • the refrigerant having entered the refrigerant pipe 50 merges the refrigerant flowing in the refrigerant pipe 24, passes through the accumulator 26, and enters the intake port of the compressor 6.
  • the first solenoid valve 30 is controlled so as to be closed and the four-way valve 8 is controlled so as to perform the cooling cycle.
  • Vapor phase refrigerant having entered the refrigerant pipe 24 from the compressor 6 passes through the four-way valve 8, enters the outdoor heat exchanger 14, and undergoes heat exchange with the outside air.
  • the refrigerant condensed with heat thereof taken by the heat exchange enters the refrigerant pipe 22 and reaches the expansion valve 12.
  • the refrigerant decompressed by the expansion valve 12 passes through the refrigerant pipe 20, enters the indoor heat exchanger 16, and undergoes heat exchange therein with indoor air.
  • the refrigerant having vapor-phased by the heat exchange enters the refrigerant pipe 18, thereafter passes through the four-way valve 8 and the accumulator 26, and enters the intake port of the compressor 6.
  • a heater (not shown) for heating the outdoor heat exchanger 14 may be provided in the air conditioner shown in Fig. 5 , for instance.
  • the air conditioner shown in Fig. 5 which is configured so as not to have a heat storage device, is inferior to the air conditioner shown in Fig. 1 in the defrosting capacity and requires longer defrosting time than the air conditioner of Fig. 1 does. Therefore, the heater for subsidiarily supplying heat to the outdoor heat exchanger 14 in the heating cycle/defrosting operation is provided therein in order to supplement the defrosting capacity.
  • the defrosting capacity equal to that of the air conditioner shown in Fig. 1 and having the heat storage device can be attained.
  • the invention is capable of efficiently performing the heating of inside of a room and the defrosting of the outdoor heat exchanger, when the outdoor heat exchanger is frosted, by the selection of either the heating cycle/defrosting operation or the cooling cycle/defrosting operation on the basis of the indoor wall temperature, and thus can be applied not only to such an air conditioner composed of an outdoor unit and an indoor unit as in the embodiment but also to an integrated type air conditioner in which an outdoor unit and an indoor unit are integrated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)
EP11823167.9A 2010-09-09 2011-03-04 Klimaanlage Not-in-force EP2615388B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010202483A JP5210364B2 (ja) 2010-09-09 2010-09-09 空気調和機
PCT/JP2011/001292 WO2012032681A1 (ja) 2010-09-09 2011-03-04 空気調和機

Publications (3)

Publication Number Publication Date
EP2615388A1 true EP2615388A1 (de) 2013-07-17
EP2615388A4 EP2615388A4 (de) 2016-06-15
EP2615388B1 EP2615388B1 (de) 2017-10-18

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ID=45810295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11823167.9A Not-in-force EP2615388B1 (de) 2010-09-09 2011-03-04 Klimaanlage

Country Status (6)

Country Link
EP (1) EP2615388B1 (de)
JP (1) JP5210364B2 (de)
KR (1) KR20130103712A (de)
CN (1) CN103097824A (de)
BR (1) BR112013005113A2 (de)
WO (1) WO2012032681A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3093586A4 (de) * 2013-10-29 2017-08-23 Mitsubishi Electric Corporation Klimaanlagenvorrichtung
CN108603706A (zh) * 2016-02-05 2018-09-28 三菱电机株式会社 空调装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014013121A (ja) * 2012-07-05 2014-01-23 Panasonic Corp 空気調和機
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CN103097824A (zh) 2013-05-08
WO2012032681A1 (ja) 2012-03-15
EP2615388B1 (de) 2017-10-18
BR112013005113A2 (pt) 2016-04-26
EP2615388A4 (de) 2016-06-15
JP2012057877A (ja) 2012-03-22
JP5210364B2 (ja) 2013-06-12
KR20130103712A (ko) 2013-09-24

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