JP5187373B2 - Air conditioner - Google Patents

Air conditioner Download PDF

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JP5187373B2
JP5187373B2 JP2010235855A JP2010235855A JP5187373B2 JP 5187373 B2 JP5187373 B2 JP 5187373B2 JP 2010235855 A JP2010235855 A JP 2010235855A JP 2010235855 A JP2010235855 A JP 2010235855A JP 5187373 B2 JP5187373 B2 JP 5187373B2
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indoor
flow path
heat exchanger
refrigerant
radiation panel
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JP2012087998A (en
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敏浩 木澤
裕記 藤岡
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Daikin Industries Ltd
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Daikin Industries Ltd
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Priority to JP2010235855A priority Critical patent/JP5187373B2/en
Priority to EP11834368.0A priority patent/EP2631560B1/en
Priority to ES11834368T priority patent/ES2776986T3/en
Priority to CN201180049916.0A priority patent/CN103168205B/en
Priority to AU2011319038A priority patent/AU2011319038B2/en
Priority to PCT/JP2011/073988 priority patent/WO2012053529A1/en
Publication of JP2012087998A publication Critical patent/JP2012087998A/en
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    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
    • F24F1/0073—Indoor units, e.g. fan coil units with means for purifying supplied air characterised by the mounting or arrangement of filters
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56—Remote control
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0089—Systems using radiation from walls or panels
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/005—Outdoor unit expansion valves
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/006—Compression machines, plants or systems with reversible cycle not otherwise provided for two pipes connecting the outdoor side to the indoor side with multiple indoor units
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/021—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit
    • F25B2313/0213—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit the auxiliary heat exchanger being only used during heating

Description

本発明は、室内熱交換器と輻射パネルが並列に配置された空気調和機に関するものである。   The present invention relates to an air conditioner in which an indoor heat exchanger and a radiation panel are arranged in parallel.

空気調和機として、室内熱交換器および輻射パネルを有する室内機と、室内熱交換器および輻射パネルに冷媒を循環供給する室外機とを備えたものが知られている（例えば特許文献１参照）。この空気調和機の冷媒回路では、室内熱交換器が設けられた流路と、輻射パネルが設けられた流路が並列になっており、それぞれの流路に、冷媒回路内の圧力を調整するための膨張弁（減圧機構）が設けられている。   As an air conditioner, one having an indoor unit having an indoor heat exchanger and a radiation panel and an outdoor unit that circulates and supplies a refrigerant to the indoor heat exchanger and the radiation panel is known (see, for example, Patent Document 1). . In the refrigerant circuit of this air conditioner, the flow path provided with the indoor heat exchanger and the flow path provided with the radiation panel are arranged in parallel, and the pressure in the refrigerant circuit is adjusted to each flow path. An expansion valve (pressure reduction mechanism) is provided.

特開平５−２８０７６２号公報Japanese Patent Application Laid-Open No. 5-280762

この空気調和機では、例えば圧縮機の吐出温度制御を行う場合には、上述した２つの流路に設けられた２つの膨張弁を共に制御する必要があり、制御が複雑であった。そのため、適正な制御を短時間で行うことが困難であった。   In this air conditioner, for example, when controlling the discharge temperature of the compressor, it is necessary to control the two expansion valves provided in the two flow paths described above, and the control is complicated. For this reason, it is difficult to perform appropriate control in a short time.

そこで、本発明の目的は、容易に制御できる空気調和機を提供することである。   Accordingly, an object of the present invention is to provide an air conditioner that can be easily controlled.

第１の発明に係る空気調和機は、室内機と室外機とを接続する冷媒回路を備えた空気調和機であって、前記室内機が、その内部においてファンに対向するように設けられた室内熱交換器と、その表面に設けられた輻射パネルとを有しており、前記冷媒回路が、減圧機構、室外熱交換器及び圧縮機が順に設けられた主流路と、暖房運転時、前記主流路の前記圧縮機の下流側で且つ前記室内機の内部に設けられた分岐部と、前記減圧機構の上流側で且つ前記室内機の内部に設けられた合流部とを接続すると共に、前記室内熱交換器が設けられた第１流路と、暖房運転時、前記分岐部と前記合流部とを前記第１流路と並列に接続すると共に、前記輻射パネルが設けられた第２流路とを有しており、前記第１流路に電動弁が設けられておらず、且つ、暖房運転時、前記第２流路において前記輻射パネルの下流側に、前記輻射パネルの温度を制御するために前記輻射パネルに供給される冷媒の流量を調整する電動弁が設けられると共に、前記室外機が、前記圧縮機、前記室外熱交換器及び前記減圧機構を有し、前記室内機が、前記電動弁を有していることを特徴とする。 An air conditioner according to a first aspect of the present invention is an air conditioner including a refrigerant circuit that connects an indoor unit and an outdoor unit, wherein the indoor unit is provided so as to face a fan inside the air conditioner. A heat exchanger and a radiation panel provided on the surface thereof, wherein the refrigerant circuit includes a main flow path in which a decompression mechanism, an outdoor heat exchanger, and a compressor are provided in order, and the mainstream during heating operation. said compressor branch part provided and the inside of the indoor unit on the downstream side of the road, along with connecting the merging part and provided inside the indoor unit on the upstream side of the pressure reducing mechanism, the indoor A first flow path provided with a heat exchanger, and a second flow path provided with the radiation panel while connecting the branching section and the merging section in parallel with the first flow path during heating operation; the has an electric valve is not provided in the first flow path, and, An electric valve for adjusting the flow rate of the refrigerant supplied to the radiation panel for controlling the temperature of the radiation panel is provided on the downstream side of the radiation panel in the second flow path during the cell operation. A machine has the compressor, the outdoor heat exchanger, and the pressure reduction mechanism, and the indoor unit has the motor-operated valve.

この空気調和機では、主流路に設けられた減圧機構を制御するだけで、冷媒回路内の圧力を減圧できるので、第１流路と第２流路にそれぞれ減圧機構を設ける場合に比べて、制御（例えば、圧縮機の吐出温度に基づく制御など）を容易に行うことができる。また、第１流路および第２流路の一方に弁機構が設けられているため、室内熱交換器または輻射パネルを流れる冷媒の流量を調整することができる。   In this air conditioner, since the pressure in the refrigerant circuit can be reduced only by controlling the pressure reducing mechanism provided in the main flow path, compared with the case where the pressure reducing mechanisms are provided in the first flow path and the second flow path, respectively. Control (for example, control based on the discharge temperature of the compressor) can be easily performed. Moreover, since the valve mechanism is provided in one of the first flow path and the second flow path, the flow rate of the refrigerant flowing through the indoor heat exchanger or the radiation panel can be adjusted.

この空気調和機では、弁機構が第２流路に設けられているため、輻射パネルを流れる冷媒の流量を調整することができる。また、弁機構を閉弁することで、輻射パネルに冷媒を流さずに、室内熱交換器にのみ冷媒を流すことができる。   In this air conditioner, since the valve mechanism is provided in the second flow path, the flow rate of the refrigerant flowing through the radiation panel can be adjusted. Further, by closing the valve mechanism, it is possible to flow the refrigerant only through the indoor heat exchanger without flowing the refrigerant through the radiation panel.

この空気調和機では、暖房運転時の冷媒の流れ方向に関して輻射パネルの下流側に弁機構を設けているため、輻射パネルの上流側に弁機構を設ける場合よりも、弁機構を通過する冷媒の温度を低くできる。そのため、弁機構の耐久性を向上させることができる。また、弁機構を閉弁して冷房運転を行う際、低温の冷媒が輻射パネルに流れ込むのを完全に遮断できるため、輻射パネルの結露を防止できる。   In this air conditioner, since the valve mechanism is provided on the downstream side of the radiation panel in the flow direction of the refrigerant during the heating operation, the refrigerant that passes through the valve mechanism is disposed more than in the case where the valve mechanism is provided on the upstream side of the radiation panel. The temperature can be lowered. Therefore, the durability of the valve mechanism can be improved. Further, when the valve mechanism is closed and the cooling operation is performed, the low-temperature refrigerant can be completely blocked from flowing into the radiant panel, so that dew condensation on the radiant panel can be prevented.

この空気調和機では、減圧機構が室外機に設けられているので、減圧機構の切り換えに伴う音は、室内では聞こえない。つまり、減圧機構の切り換え時に、室内での騒音を防止できる。   In this air conditioner, since the decompression mechanism is provided in the outdoor unit, the sound accompanying switching of the decompression mechanism cannot be heard indoors. That is, indoor noise can be prevented when the pressure reducing mechanism is switched.

以上の説明に述べたように、本発明によれば、以下の効果が得られる。   As described above, according to the present invention, the following effects can be obtained.

第１の発明では、主流路に設けられた減圧機構を制御するだけで、冷媒回路内の圧力を減圧できるので、第１流路と第２流路にそれぞれ減圧機構を設ける場合に比べて、制御（例えば、圧縮機の吐出温度に基づく制御など）を容易に行うことができる。また、第１流路および第２流路の一方に弁機構が設けられているため、室内熱交換器または輻射パネルを流れる冷媒の流量を調整することができる。   In the first invention, since the pressure in the refrigerant circuit can be reduced only by controlling the pressure reducing mechanism provided in the main flow path, compared with the case where the pressure reducing mechanisms are provided in the first flow path and the second flow path, respectively. Control (for example, control based on the discharge temperature of the compressor) can be easily performed. Moreover, since the valve mechanism is provided in one of the first flow path and the second flow path, the flow rate of the refrigerant flowing through the indoor heat exchanger or the radiation panel can be adjusted.

第１の発明では、弁機構が第２流路に設けられているため、輻射パネルを流れる冷媒の流量を調整することができる。また、弁機構を閉弁することで、輻射パネルに冷媒を流さずに、室内熱交換器にのみ冷媒を流すことができる。   In the first invention, since the valve mechanism is provided in the second flow path, the flow rate of the refrigerant flowing through the radiation panel can be adjusted. Further, by closing the valve mechanism, it is possible to flow the refrigerant only through the indoor heat exchanger without flowing the refrigerant through the radiation panel.

第１の発明では、暖房運転時の冷媒の流れ方向に関して輻射パネルの下流側に弁機構を設けているため、輻射パネルの上流側に弁機構を設ける場合よりも、弁機構を通過する冷媒の温度がを低くできる。そのため、弁機構の耐久性を向上させることができる。また、弁機構を閉弁して冷房運転を行う際、低温の冷媒が輻射パネルに流れ込むのを完全に遮断できるため、輻射パネルの結露を防止できる。   In the first invention, since the valve mechanism is provided on the downstream side of the radiant panel with respect to the flow direction of the refrigerant during the heating operation, the refrigerant that passes through the valve mechanism is provided rather than the valve mechanism provided on the upstream side of the radiant panel. The temperature can be lowered. Therefore, the durability of the valve mechanism can be improved. Further, when the valve mechanism is closed and the cooling operation is performed, the low-temperature refrigerant can be completely blocked from flowing into the radiant panel, so that dew condensation on the radiant panel can be prevented.

第１の発明では、減圧機構が室外機に設けられているので、減圧機構の切り換えに伴う音は、室内では聞こえない。つまり、減圧機構の切り換え時に、室内での騒音を防止できる。   In the first invention, since the decompression mechanism is provided in the outdoor unit, the sound accompanying switching of the decompression mechanism cannot be heard indoors. That is, indoor noise can be prevented when the pressure reducing mechanism is switched.

本発明の実施形態に係る空気調和機の概略構成を示す回路図であって、室内電動弁を閉弁して冷房運転または暖房運転を行っているときの冷媒の流れを示す図である。It is a circuit diagram showing the schematic structure of the air harmony machine concerning the embodiment of the present invention, and is a figure showing the flow of the refrigerant at the time of closing the indoor motor operated valve and performing the cooling operation or the heating operation. 本発明の実施形態に係る空気調和機の概略構成を示す回路図であって、室内電動弁を開弁して暖房運転を行っているときの冷媒の流れを示す図である。It is a circuit diagram showing the schematic structure of the air conditioner concerning the embodiment of the present invention, and is a figure showing the flow of the refrigerant when opening the indoor motor operated valve and performing the heating operation. 空気調和機を制御する制御部の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the control part which controls an air conditioner. 本発明の他の実施形態に係る空気調和機の概略構成を示す回路図である。It is a circuit diagram which shows schematic structure of the air conditioner which concerns on other embodiment of this invention.

以下、本発明に係る空気調和機１の実施の形態について説明する。   Hereinafter, an embodiment of an air conditioner 1 according to the present invention will be described.

図１および図２に示すように、本実施形態の空気調和機１は、室内に設置される室内機２と、室外に設置される室外機３と、リモコン４（図３参照）とを備えている。
室内機２は、室内熱交換器２０と、室内熱交換器２０の近傍に配置された室内ファン２１と、輻射パネル２２と、室内電動弁（弁機構）２３と、室内の気温を検出するための室内温度センサ２４とを備えている。また、室外機３は、圧縮機３０と、四路切換弁３１と、室外熱交換器３２と、室外熱交換器３２の近傍に配置された室外ファン３３と、室外電動弁（減圧機構）３４とを備えている。室内機２と室外機３とは環状の冷媒回路１０で接続されている。冷媒回路１０は、主流路１１と第１流路１２と第２流路１３を有している。 As shown in FIGS. 1 and 2, the air conditioner 1 of the present embodiment includes an indoor unit 2 installed indoors, an outdoor unit 3 installed outdoor, and a remote controller 4 (see FIG. 3). ing.
The indoor unit 2 detects an indoor heat exchanger 20, an indoor fan 21 disposed in the vicinity of the indoor heat exchanger 20, a radiation panel 22, an indoor electric valve (valve mechanism) 23, and an indoor air temperature. The indoor temperature sensor 24 is provided. The outdoor unit 3 includes a compressor 30, a four-way switching valve 31, an outdoor heat exchanger 32, an outdoor fan 33 disposed in the vicinity of the outdoor heat exchanger 32, and an outdoor electric valve (decompression mechanism) 34. And. The indoor unit 2 and the outdoor unit 3 are connected by an annular refrigerant circuit 10. The refrigerant circuit 10 includes a main channel 11, a first channel 12, and a second channel 13.

主流路１１には、室外電動弁３４、室外熱交換器３２、および圧縮機３０がこの順に設けられている。また、主流路１１には、四路切換弁３１が設けられており、四路切換弁３１を切り換えることにより、圧縮機３０の吐出側と吸入側のいずれかが室外熱交換器３２が接続される。主流路１１における圧縮機３０の吸入側と四路切換弁３１との間にはアキュムレータ３５が設けられており、主流路１１における圧縮機３０の吐出側と四路切換弁３１との間には、吐出温度センサ３６が設けられている。また、室外熱交換器３２には、室外熱交温度センサ２８が付設されている。室外電動弁３４は、その開度を変更可能であって、減圧機構として機能する。また、主流路１１において、圧縮機３０の吸入側が室外熱交換器３２に接続されたとき（図２に示した暖房運転時）に、圧縮機３０の下流側には、分岐部１１ａが設けられており、室外電動弁３４の上流側には、合流部１１ｂが設けられている。   The main flow path 11 is provided with an outdoor electric valve 34, an outdoor heat exchanger 32, and a compressor 30 in this order. Further, the four-way switching valve 31 is provided in the main flow path 11, and by switching the four-way switching valve 31, either the discharge side or the suction side of the compressor 30 is connected to the outdoor heat exchanger 32. The An accumulator 35 is provided between the suction side of the compressor 30 in the main flow path 11 and the four-way switching valve 31, and between the discharge side of the compressor 30 in the main flow path 11 and the four-way switching valve 31. A discharge temperature sensor 36 is provided. An outdoor heat exchanger temperature sensor 28 is attached to the outdoor heat exchanger 32. The outdoor electric valve 34 can change its opening degree and functions as a pressure reducing mechanism. Further, in the main flow path 11, when the suction side of the compressor 30 is connected to the outdoor heat exchanger 32 (at the time of heating operation shown in FIG. 2), the branch portion 11 a is provided on the downstream side of the compressor 30. A junction portion 11b is provided on the upstream side of the outdoor electric valve 34.

第１流路１２および第２流路１３は、分岐部１１ａと合流部１１ｂとの間に設けられ、並列に接続されている。第１流路１２には、室内熱交換器２０が設けられており、第２流路１３には、分岐部１１ａ側から順に、輻射パネル２２および室内電動弁２３が設けられている。本実施形態では、冷媒回路１０において、第１流路１２及び第２流路１３を除いた流路であって、分岐部１１ａと合流部１１ｂとの間の流路が、主流路となる。   The 1st flow path 12 and the 2nd flow path 13 are provided between the branch part 11a and the junction part 11b, and are connected in parallel. The first flow path 12 is provided with an indoor heat exchanger 20, and the second flow path 13 is provided with a radiation panel 22 and an indoor motorized valve 23 in order from the branching portion 11 a side. In the present embodiment, in the refrigerant circuit 10, the flow path excluding the first flow path 12 and the second flow path 13, and the flow path between the branching portion 11 a and the merging portion 11 b becomes the main flow path.

室内熱交換器２０は、室内機２の内部において室内ファン２１と対向するように設けられ、室内ファン２１の風上側に配置されている。したがって、室内機２では、室内熱交換器２０との熱交換により加熱または冷却された空気が、室内ファン２１によって温風または冷風として室内に吹き出されることで、温風暖房または冷房が行われる。また、室内熱交換器２０には、室内熱交温度センサ２７が設けられている。   The indoor heat exchanger 20 is provided inside the indoor unit 2 so as to face the indoor fan 21, and is disposed on the windward side of the indoor fan 21. Therefore, in the indoor unit 2, the air heated or cooled by heat exchange with the indoor heat exchanger 20 is blown into the room as hot air or cold air by the indoor fan 21, so that hot air heating or cooling is performed. . The indoor heat exchanger 20 is provided with an indoor heat exchanger temperature sensor 27.

輻射パネル２２は、室内機２の表面に配置されており、その裏面側には、冷媒が流れる配管が設けられている。したがって、室内機２では、この輻射パネル２２の配管を流れる冷媒の熱が室内に輻射されることで輻射暖房が行われる。また、第２流路１３における輻射パネル２２の両側には、パネル入温度センサ２５と、パネル出温度センサ２６が設けられている。   The radiation panel 22 is disposed on the surface of the indoor unit 2, and a pipe through which a refrigerant flows is provided on the back side thereof. Therefore, in the indoor unit 2, radiant heating is performed by radiating the heat of the refrigerant flowing through the piping of the radiant panel 22 into the room. Further, a panel entry temperature sensor 25 and a panel exit temperature sensor 26 are provided on both sides of the radiation panel 22 in the second flow path 13.

室内電動弁２３は、輻射パネル２２に供給される冷媒の流量を調整するために設けられている。室内電動弁２３は、後述する輻射暖房運転時および輻射微風暖房運転時の冷媒の流れ方向における輻射パネル２２の下流側に設けられている。   The indoor motor operated valve 23 is provided to adjust the flow rate of the refrigerant supplied to the radiation panel 22. The indoor motor-operated valve 23 is provided on the downstream side of the radiation panel 22 in the refrigerant flow direction during a radiation heating operation and a radiation breeze heating operation, which will be described later.

本実施形態の空気調和機１は、冷房運転、温風暖房運転、輻射暖房運転、および輻射微風暖房運転を行うことができる。冷房運転は、輻射パネル２２に冷媒を流さないで室内熱交換器２０に冷媒を流して冷房を行う運転であって、温風暖房運転は、輻射パネル２２に冷媒を流さないで室内熱交換器２０に冷媒を流して温風暖房を行う運転である。輻射暖房運転は、室内熱交換器２０に冷媒を流して温風暖房を行うと共に、輻射パネル２２に冷媒を流して輻射暖房を行う運転である。輻射微風暖房運転は、温風暖房運転時および輻射暖房運転時よりも低風量で且つ一定の風量の温風暖房を行うと共に、輻射パネル２２に冷媒を流して輻射暖房を行う運転である。   The air conditioner 1 of the present embodiment can perform a cooling operation, a warm air heating operation, a radiant heating operation, and a radiant light wind heating operation. The cooling operation is an operation in which the refrigerant is allowed to flow through the indoor heat exchanger 20 without flowing the refrigerant through the radiant panel 22, and the hot air heating operation is the indoor heat exchanger without flowing the refrigerant through the radiant panel 22. 20 is an operation in which a refrigerant is passed through to perform hot air heating. The radiant heating operation is an operation in which the refrigerant is passed through the indoor heat exchanger 20 to perform hot air heating, and the refrigerant is passed through the radiant panel 22 to perform radiant heating. The radiant light breeze heating operation is an operation of performing radiant heating by flowing a refrigerant through the radiant panel 22 while performing a warm air heating with a lower air volume and a constant air volume than during the warm air heating operation and the radiant heating operation.

各運転時における冷媒回路１０の冷媒の流れについて図１および図２を用いて説明する。
冷房運転時には、室内電動弁２３が閉弁されると共に、四路切換弁３１が図１中破線で示す状態に切り換えられる。そのため、図１中破線の矢印で示すように、圧縮機３０から吐出された高温高圧冷媒は、四路切換弁３１を通って、室外熱交換器３２に流入する。そして、室外熱交換器３２において凝縮した冷媒は、室外電動弁３４で減圧された後、室内熱交換器２０に流入する。そして、室内熱交換器２０において蒸発した冷媒は、四路切換弁３１およびアキュムレータ３５を介して、圧縮機３０に流入する。 The flow of the refrigerant in the refrigerant circuit 10 during each operation will be described with reference to FIGS. 1 and 2.
During the cooling operation, the indoor electric valve 23 is closed, and the four-way switching valve 31 is switched to the state indicated by the broken line in FIG. Therefore, as indicated by the dashed arrows in FIG. 1, the high-temperature and high-pressure refrigerant discharged from the compressor 30 flows into the outdoor heat exchanger 32 through the four-way switching valve 31. The refrigerant condensed in the outdoor heat exchanger 32 is decompressed by the outdoor motor operated valve 34 and then flows into the indoor heat exchanger 20. Then, the refrigerant evaporated in the indoor heat exchanger 20 flows into the compressor 30 via the four-way switching valve 31 and the accumulator 35.

温風暖房運転時には、室内電動弁２３が閉弁されると共に、四路切換弁３１が図1中実線で示す状態に切り換えられる。そのため、図１中実線の矢印で示すように、圧縮機３０から吐出された高温高圧冷媒は、四路切換弁３１を通って、室内熱交換器２０に流入する。そして、室内熱交換器２０において凝縮した冷媒は、室外電動弁３４で減圧された後、室外熱交換器３２に流入する。そして、室外熱交換器３２において蒸発した冷媒は、四路切換弁３１およびアキュムレータ３５を介して、圧縮機３０に流入する。   During the hot air heating operation, the indoor motor operated valve 23 is closed and the four-way switching valve 31 is switched to the state shown by the solid line in FIG. Therefore, as indicated by the solid arrow in FIG. 1, the high-temperature and high-pressure refrigerant discharged from the compressor 30 flows into the indoor heat exchanger 20 through the four-way switching valve 31. The refrigerant condensed in the indoor heat exchanger 20 is decompressed by the outdoor motor operated valve 34 and then flows into the outdoor heat exchanger 32. The refrigerant evaporated in the outdoor heat exchanger 32 flows into the compressor 30 via the four-way switching valve 31 and the accumulator 35.

輻射暖房運転時および輻射微風暖房運転時には、室内電動弁２３が開弁されると共に、四路切換弁３１が図２中実線で示す状態に切り換えられる。そのため、図２中実線の矢印で示すように、圧縮機３０から吐出された高温高圧冷媒は、四路切換弁３１を通って、室内熱交換器２０と輻射パネル２２に流入する。そして、室内熱交換器２０と輻射パネル２２において凝縮した冷媒は、室外電動弁３４で減圧された後、室外熱交換器３２に流入する。そして、室外熱交換器３２において蒸発した冷媒は、四路切換弁３１およびアキュムレータ３５を介して、圧縮機３０に流入する。   During the radiant heating operation and the radiant breeze heating operation, the indoor motor-operated valve 23 is opened, and the four-way switching valve 31 is switched to the state indicated by the solid line in FIG. Therefore, as indicated by the solid arrows in FIG. 2, the high-temperature and high-pressure refrigerant discharged from the compressor 30 flows into the indoor heat exchanger 20 and the radiation panel 22 through the four-way switching valve 31. Then, the refrigerant condensed in the indoor heat exchanger 20 and the radiation panel 22 is decompressed by the outdoor motor operated valve 34 and then flows into the outdoor heat exchanger 32. The refrigerant evaporated in the outdoor heat exchanger 32 flows into the compressor 30 via the four-way switching valve 31 and the accumulator 35.

リモコン４では、ユーザによって、運転の開始／停止の操作、運転モードの設定、室内温度の目標温度（室内設定温度）の設定、吹出風量の設定などが行われる。温風暖房運転時および冷房運転時には、風量設定として「風量自動」または「強」〜「弱」を選択できる。なお、本実施形態では、輻射暖房運転時および輻射微風暖房運転時には、風量は自動的に制御される。   In the remote controller 4, the user performs operation start / stop operation, operation mode setting, indoor temperature target temperature setting (indoor set temperature), blowing air volume setting, and the like. During the warm air heating operation and the cooling operation, “air volume automatic” or “strong” to “weak” can be selected as the air volume setting. In the present embodiment, the air volume is automatically controlled during the radiant heating operation and the radiant light wind heating operation.

次に、空気調和機１を制御する制御部５について図３を参照しつつ説明する。
図３に示すように、制御部５は、記憶部（記憶手段）５０と、室内電動弁制御部５２と、室内ファン制御部５３と、圧縮機制御部（制御手段）５４と、室外電動弁制御部５５とを有している。 Next, the control part 5 which controls the air conditioner 1 is demonstrated, referring FIG.
As shown in FIG. 3, the control unit 5 includes a storage unit (storage unit) 50, an indoor motorized valve control unit 52, an indoor fan control unit 53, a compressor control unit (control unit) 54, and an outdoor motorized valve. And a control unit 55.

記憶部５０には、空気調和機１に関する種々の運転設定や、制御プログラムや、その制御プログラムの実行に必要なデータテーブルなどが記憶されている。運転設定には、室内温度の目標温度（室内設定温度）のように、ユーザによってリモコン４が操作されることで設定されるものと、空気調和機１に対して予め設定されたものとがある。本実施形態の空気調和機１では、輻射パネル２２の目標温度範囲は、予め所定の温度範囲（例えば５０〜５５℃）に設定されている。なお、リモコン４の操作によって輻射パネル２２の目標温度範囲を設定できるようになっていてもよい。   The storage unit 50 stores various operation settings related to the air conditioner 1, control programs, data tables necessary for executing the control programs, and the like. The operation settings include those set by operating the remote controller 4 by the user, such as a target temperature of the room temperature (room set temperature), and those set in advance for the air conditioner 1. . In the air conditioner 1 of this embodiment, the target temperature range of the radiation panel 22 is set in advance to a predetermined temperature range (for example, 50 to 55 ° C.). Note that the target temperature range of the radiation panel 22 may be set by operating the remote controller 4.

室内電動弁制御部５２は、室内電動弁２３の開度を制御する。冷房運転時または温風暖房運転時には、室内電動弁制御部５２は、室内電動弁２３を閉弁する。また、輻射暖房運転時または輻射微風暖房運転時には、室内電動弁制御部５２は、輻射パネル２２の温度に基づいて室内電動弁２３の開度を制御する。具体的には、パネル入温度センサ２５およびパネル出温度センサ２６でそれぞれ検出された温度の平均値に基づいて、輻射パネル２２の表面温度（予測値）を算出し、この輻射パネル２２の表面温度の予測値（以下、単に輻射パネル温度という）が、パネル目標温度範囲（例えば５０〜５５℃）となるように、室内電動弁２３の開度を制御する。なお、本実施形態では、輻射パネル温度を算出するために、パネル入温度センサ２５とパネル出温度センサ２６の検出温度の両方を用いているが、パネル入温度センサ２５の検出温度のみを用いてもよく、パネル出温度センサ２６の検出温度のみを用いてもよい。   The indoor motorized valve control unit 52 controls the opening degree of the indoor motorized valve 23. During the cooling operation or the hot air heating operation, the indoor motor operated valve control unit 52 closes the indoor motor operated valve 23. In addition, during the radiant heating operation or the radiant breeze heating operation, the indoor motor-operated valve control unit 52 controls the opening degree of the indoor motor-operated valve 23 based on the temperature of the radiant panel 22. Specifically, the surface temperature (predicted value) of the radiation panel 22 is calculated based on the average value of the temperatures detected by the panel entry temperature sensor 25 and the panel exit temperature sensor 26, and the surface temperature of the radiation panel 22 is calculated. Of the indoor motor-operated valve 23 is controlled so that the predicted value (hereinafter, simply referred to as “radiant panel temperature”) falls within the panel target temperature range (for example, 50 to 55 ° C.). In this embodiment, in order to calculate the radiation panel temperature, both the detected temperature of the panel input temperature sensor 25 and the panel output temperature sensor 26 are used, but only the detected temperature of the panel input temperature sensor 25 is used. Alternatively, only the temperature detected by the panel temperature sensor 26 may be used.

室内ファン制御部５３は、室内ファン２１の回転数を制御する。
温風暖房運転もしくは冷房運転時の風量自動運転時、または輻射暖房運転時には、室内ファン制御部５３は、室内温度センサ２４で検出される室内温度や室内設定温度等に基づいて、室内ファン２１の回転数を制御する。また、温風暖房運転もしくは冷房運転であって、風量設定として「強」〜「弱」が設定された場合、または輻射微風暖房運転時には、それぞれ予め設定されたファンタップに対応する回転数に室内ファン２１を制御する。 The indoor fan control unit 53 controls the rotational speed of the indoor fan 21.
During the air volume automatic operation during the hot air heating operation or the cooling operation, or during the radiant heating operation, the indoor fan control unit 53 determines whether the indoor fan 21 is in accordance with the indoor temperature or the indoor set temperature detected by the indoor temperature sensor 24. Control the number of revolutions. Also, in the warm air heating operation or the cooling operation, when “strong” to “weak” is set as the air volume setting, or during the radiant light air heating operation, the indoor speed is set to the rotation speed corresponding to each preset fan tap. The fan 21 is controlled.

圧縮機制御部５４は、室内温度や室内設定温度、室内熱交温度センサ２７で検出される熱交温度等に基づいて、圧縮機３０の運転周波数を制御する。   The compressor control unit 54 controls the operating frequency of the compressor 30 based on the indoor temperature, the indoor set temperature, the heat exchange temperature detected by the indoor heat exchange temperature sensor 27, and the like.

室外電動弁制御部５５は、室外電動弁３４の開度を制御する。詳細には、吐出温度センサ３６で検出される温度が、その運転状態での最適温度となるように、室外電動弁３４の開度を制御する。最適温度は、室内熱交温度センサ２７で検出される温度および室外熱交温度センサ２８で検知される温度などに基づいて決定される。   The outdoor electric valve control unit 55 controls the opening degree of the outdoor electric valve 34. Specifically, the opening degree of the outdoor electric valve 34 is controlled so that the temperature detected by the discharge temperature sensor 36 becomes the optimum temperature in the operating state. The optimum temperature is determined based on the temperature detected by the indoor heat exchange temperature sensor 27, the temperature detected by the outdoor heat exchange temperature sensor 28, and the like.

以上説明した本実施形態の空気調和機１によると、主流路１１に設けられた減圧機構（室外電動弁）３４を制御するだけで、冷媒回路１０内の圧力を減圧できるので、第１流路１２と第２流路１３にそれぞれ減圧機構を設ける場合に比べて、制御を容易に行うことができる。   According to the air conditioner 1 of the present embodiment described above, the pressure in the refrigerant circuit 10 can be reduced only by controlling the pressure reducing mechanism (outdoor motor operated valve) 34 provided in the main flow path 11, so that the first flow path Compared with the case where a pressure reducing mechanism is provided in each of 12 and the second flow path 13, the control can be easily performed.

また、本実施形態では、室内電動弁２３が第２流路１３に設けられている。そのため、輻射パネル２２を流れる冷媒の流量を調整することができる。また、室内電動弁２３を閉弁することで、輻射パネル２２に冷媒を流さずに、室内熱交換器２０にのみ冷媒を流すことができる。   Further, in the present embodiment, the indoor motor operated valve 23 is provided in the second flow path 13. Therefore, the flow rate of the refrigerant flowing through the radiation panel 22 can be adjusted. In addition, by closing the indoor motor-operated valve 23, the refrigerant can flow only to the indoor heat exchanger 20 without flowing the refrigerant to the radiation panel 22.

また、本実施形態では、輻射暖房運転時および輻射微風暖房運転時の冷媒の流れ方向に関して輻射パネル２２の下流側に、室内電動弁２３を設けている。したがって、輻射パネル２２の上流側に室内電動弁２３を設ける場合よりも、室内電動弁２３を通過する冷媒の温度を低くできる。そのため、室内電動弁２３の耐久性を向上させることができる。また、室内電動弁２３を閉弁して冷房運転を行う際、低温の冷媒が輻射パネル２２に流れ込むのを完全に遮断できるため、輻射パネル２２の結露を防止できる。   Moreover, in this embodiment, the indoor motor operated valve 23 is provided in the downstream of the radiation panel 22 regarding the flow direction of the refrigerant | coolant at the time of a radiation heating operation and a radiation breeze heating operation. Therefore, the temperature of the refrigerant passing through the indoor motor-operated valve 23 can be made lower than when the indoor motor-operated valve 23 is provided upstream of the radiation panel 22. Therefore, the durability of the indoor motor operated valve 23 can be improved. In addition, when the indoor motor-operated valve 23 is closed and the cooling operation is performed, the low-temperature refrigerant can be completely blocked from flowing into the radiation panel 22, so that condensation on the radiation panel 22 can be prevented.

また、従来の空気調和機のように、輻射パネルが設けられた流路と室内熱交換器が設けられた流路にそれぞれ減圧機構が配置された構成において、減圧機構が室内機に設けられる場合、減圧機構の切り換えに伴う騒音が室内で発生するという問題が起こる。また、輻射パネルが設けられた流路と室内熱交換器が設けられた流路との合流部を室外機に設けて、減圧機構を室外機に設けることも可能であるが、この場合、室内機と室外機とを接続する配管の数が増えてしまう。
一方、本実施形態では、主流路１１に室外電動弁３４を設けているため、室内機２と室外機３とを接続する配管の数を増やすことなく、室外電動弁３４を室外機３に設けることができる。そのため、室外電動弁３４の切り換えに伴う音は、室内では聞こえない。つまり、室外電動弁３４の切り換え時に、室内での騒音を防止できる。 In addition, when a pressure reducing mechanism is provided in each of a flow path provided with a radiation panel and a flow path provided with an indoor heat exchanger as in a conventional air conditioner, the pressure reducing mechanism is provided in the indoor unit. There is a problem that noise accompanying the switching of the decompression mechanism is generated indoors. Further, it is possible to provide the outdoor unit with a junction between the flow path provided with the radiant panel and the flow path provided with the indoor heat exchanger, and the pressure reducing mechanism may be provided in the outdoor unit. The number of pipes connecting the machine and the outdoor unit will increase.
On the other hand, in this embodiment, since the outdoor electric valve 34 is provided in the main flow path 11, the outdoor electric valve 34 is provided in the outdoor unit 3 without increasing the number of pipes connecting the indoor unit 2 and the outdoor unit 3. be able to. Therefore, the sound accompanying the switching of the outdoor electric valve 34 cannot be heard indoors. That is, indoor noise can be prevented when the outdoor motor operated valve 34 is switched.

以上、本発明の実施形態について図面に基づいて説明したが、具体的な構成は、これらの実施形態に限定されるものでないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。   As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

上記実施形態では、室内電動弁２３は、輻射暖房運転時および輻射微風暖房運転時の冷媒の流れ方向において輻射パネル２２の下流側に設けられているが、上流側に設けられていてもよい。   In the above embodiment, the indoor motor operated valve 23 is provided on the downstream side of the radiation panel 22 in the refrigerant flow direction during the radiant heating operation and the radiant light wind heating operation, but may be provided on the upstream side.

上記実施形態では、空気調和機１が、輻射パネル２２に冷媒を流さないで室内熱交換器２０に冷媒を流して温風暖房を行う温風暖房運転を行うことができるが、この温風暖房運転を行わない場合には、第２流路１３に室内電動弁２３を設ける代わりに、例えば図４に示す空気調和機１０１のように、第１流路１１２に室内電動弁１２３を設けると共に、第２流路１１３における輻射パネル２２と合流部１１ｂとの間に逆止弁１２９を設けてもよい。逆止弁１２９は、第２流路１１３において、輻射パネル２２から合流部１１ｂに向かってだけ冷媒を流し、合流部１１ｂから輻射パネル２２に向かって冷媒を流さないものである。図４中の実線の矢印は、輻射暖房運転時または輻射微風暖房運転時の冷媒の流れを示しており、図４中の破線の矢印は、冷房運転時の冷媒の流れを示している。室内電動弁１２３によって、室内熱交換器２０に供給される冷媒の流量を調整することができる。また、室内電動弁１２３を閉弁することで、室内熱交換器２０に冷媒を流さずに輻射パネル２２にのみ冷媒を流して輻射暖房のみを行うことが可能となる。また、逆止弁１２９によって、冷房運転時に、輻射パネル２２に低温の冷媒が流れるのを防止できる。なお、図４では、室内電動弁１２３を室内熱交換器２０の合流部１１ｂ側に設けているが、分岐部１１ａ側に設けてもよい。   In the above embodiment, the air conditioner 1 can perform the hot air heating operation in which the refrigerant flows through the indoor heat exchanger 20 without causing the refrigerant to flow through the radiation panel 22. In the case where the operation is not performed, instead of providing the indoor electric valve 23 in the second flow path 13, for example, as in the air conditioner 101 shown in FIG. 4, the indoor electric valve 123 is provided in the first flow path 112, A check valve 129 may be provided between the radiation panel 22 and the merging portion 11 b in the second flow path 113. In the second flow path 113, the check valve 129 allows the refrigerant to flow only from the radiation panel 22 toward the merging portion 11b, and does not cause the refrigerant to flow from the merging portion 11b toward the radiating panel 22. A solid line arrow in FIG. 4 indicates the flow of the refrigerant during the radiant heating operation or the radiant breeze heating operation, and a broken line arrow in FIG. 4 indicates the flow of the refrigerant during the cooling operation. The flow rate of the refrigerant supplied to the indoor heat exchanger 20 can be adjusted by the indoor motor operated valve 123. Moreover, by closing the indoor motor operated valve 123, it is possible to perform only the radiant heating by flowing the refrigerant only to the radiation panel 22 without flowing the refrigerant to the indoor heat exchanger 20. Further, the check valve 129 can prevent the low-temperature refrigerant from flowing through the radiation panel 22 during the cooling operation. In addition, in FIG. 4, although the indoor motor operated valve 123 is provided in the junction part 11b side of the indoor heat exchanger 20, you may provide in the branch part 11a side.

本発明を利用すれば、空気調和機の制御を容易に行うことができる。   If this invention is utilized, control of an air conditioner can be performed easily.

１ 空気調和機
２ 室内機
３ 室外機
２０ 室内熱交換器
２２ 輻射パネル
２３ 室内電動弁（弁機構）
３０ 圧縮機
３２ 室外熱交換器
３４ 室外電動弁（減圧機構） DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Indoor unit 3 Outdoor unit 20 Indoor heat exchanger 22 Radiation panel 23 Indoor motor operated valve (valve mechanism)
30 Compressor 32 Outdoor heat exchanger 34 Outdoor motor operated valve (pressure reduction mechanism)

Claims (1)

室内機と室外機とを接続する冷媒回路を備えた空気調和機であって、
前記室内機が、その内部においてファンに対向するように設けられた室内熱交換器と、その表面に設けられた輻射パネルとを有しており、
前記冷媒回路が、
減圧機構、室外熱交換器及び圧縮機が順に設けられた主流路と、
暖房運転時、前記主流路の前記圧縮機の下流側で且つ前記室内機の内部に設けられた分岐部と、前記減圧機構の上流側で且つ前記室内機の内部に設けられた合流部とを接続すると共に、前記室内熱交換器が設けられた第１流路と、
暖房運転時、前記分岐部と前記合流部とを前記第１流路と並列に接続すると共に、前記輻射パネルが設けられた第２流路とを有しており、
前記第１流路に電動弁が設けられておらず、且つ、暖房運転時、前記第２流路において前記輻射パネルの下流側に、前記輻射パネルの温度を制御するために前記輻射パネルに供給される冷媒の流量を調整する電動弁が設けられると共に、
前記室外機が、前記圧縮機、前記室外熱交換器及び前記減圧機構を有し、
前記室内機が、前記電動弁を有していることを特徴とする空気調和機。
An air conditioner including a refrigerant circuit that connects an indoor unit and an outdoor unit,
The indoor unit has an indoor heat exchanger provided so as to face the fan in the interior, and a radiation panel provided on the surface thereof,
The refrigerant circuit is
A main flow path in which a decompression mechanism, an outdoor heat exchanger and a compressor are provided in order;
Heating operation, and the provided inside of and the indoor unit downstream of the compressor of the main flow path branching portion, and said merging portion and provided inside of the indoor unit on the upstream side of the pressure reducing mechanism And a first flow path provided with the indoor heat exchanger,
During the heating operation, the branch portion and the merging portion are connected in parallel with the first flow path, and the second flow path is provided with the radiation panel.
An electric valve is not provided in the first flow path, and is supplied to the radiation panel to control the temperature of the radiation panel downstream of the radiation panel in the second flow path during heating operation. A motorized valve for adjusting the flow rate of the refrigerant to be
The outdoor unit includes the compressor, the outdoor heat exchanger, and the pressure reducing mechanism;
The indoor unit has the motor operated valve.
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CN201180049916.0A CN103168205B (en) 2010-10-20 2011-10-19 Air conditioner
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