WO2018061188A1 - Unité intérieure et climatiseur - Google Patents

Unité intérieure et climatiseur Download PDF

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Publication number
WO2018061188A1
WO2018061188A1 PCT/JP2016/079048 JP2016079048W WO2018061188A1 WO 2018061188 A1 WO2018061188 A1 WO 2018061188A1 JP 2016079048 W JP2016079048 W JP 2016079048W WO 2018061188 A1 WO2018061188 A1 WO 2018061188A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
refrigerant
indoor heat
air
indoor
Prior art date
Application number
PCT/JP2016/079048
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English (en)
Japanese (ja)
Inventor
雄亮 田代
早丸　靖英
中川　直紀
孔明 仲島
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 EP16917738.3A priority Critical patent/EP3521716A4/fr
Priority to CN201680089124.9A priority patent/CN109790992B/zh
Priority to JP2018541839A priority patent/JP6751150B2/ja
Priority to PCT/JP2016/079048 priority patent/WO2018061188A1/fr
Publication of WO2018061188A1 publication Critical patent/WO2018061188A1/fr

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    • 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
    • F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
    • 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
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • 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
    • 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
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • 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
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0232—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses
    • 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
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • 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
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0234—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in series arrangements
    • 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
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02732—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two three-way 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves

Definitions

  • the present invention relates to an indoor unit and an air conditioner.
  • the indoor unit that includes a plurality of indoor fans that blow air to an indoor heat exchanger (see, for example, Patent Document 1).
  • This invention is made in view of such a point, and it aims at providing the indoor unit and air conditioner which can form the blowing air from which temperature differs even if the air volume is made the same.
  • the indoor unit which concerns on this invention is installed in the housing
  • casing which has an inlet and a blower outlet, a 1st heat exchanger, a 2nd heat exchanger, a 1st heat exchanger, and a 2nd heat exchanger.
  • a refrigerant circuit connected to the refrigerant exchange capacity changing device for varying the refrigerant temperature in the pipe, and a fan installed in the housing for blowing air to the first heat exchanger and the second heat exchanger.
  • the outlet has a first outlet from which air that has passed through the fan and the first heat exchanger is blown out, and a second outlet from which air that has passed through the fan and the second heat exchanger is blown out.
  • the refrigerant exchange capacity changing device has a switching device that switches at least the flow of refrigerant in the refrigerant circuit, and either or both of the refrigerant temperature and the refrigerant flow rate in the first heat exchanger and the second heat exchanger by the refrigerant exchange capacity changing device. Different from each other from the first outlet and the second outlet. In is performed two temperature blowout operation for blowing out different temperatures of the air.
  • the air conditioner according to the present invention includes an indoor unit and an outdoor unit.
  • the refrigerant exchange capacity changing device for changing the refrigerant temperature in the first heat exchanger and the second heat exchanger is provided in the refrigerant circuit, so that blown air having different temperatures is formed even with the same air volume. Is possible.
  • FIG. 2 is a schematic vertical sectional view taken along line AA of FIG. It is a disassembled perspective view of the indoor unit of the air conditioner according to Embodiment 1 of the present invention. It is a figure which shows the refrigerant circuit of the air conditioner which concerns on Embodiment 1 of this invention.
  • FIG. 3 is a Ph diagram during normal heating operation in the air conditioner according to Embodiment 1 of the present invention. It is a Ph diagram at the time of double condensation operation in the air conditioner according to Embodiment 1 of the present invention.
  • FIG. 3 is a Ph diagram during one-way heating operation in the air conditioner according to Embodiment 1 of the present invention.
  • FIG. 3 is a Ph diagram during normal cooling operation in the air conditioner according to Embodiment 1 of the present invention. It is a figure which shows the flow of the refrigerant
  • FIG. 5 is a Ph diagram during one-way cooling operation in the air conditioner according to Embodiment 1 of the present invention. It is a figure which shows the refrigerant circuit of the modification 1 of the air conditioner which concerns on Embodiment 1 of this invention. It is a Ph diagram at the time of double condensation operation in Modification 1 of the air conditioner according to Embodiment 1 of the present invention.
  • FIG. 1 is a perspective view of the whole indoor unit of an air conditioner according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic longitudinal sectional view taken along line AA of FIG.
  • FIG. 3 is an exploded perspective view of the indoor unit of the air conditioner according to Embodiment 1 of the present invention. Note that “upper”, “lower”, “left”, “right”, “front”, and “rear” used in the following description mean directions when the indoor unit is viewed from the front side unless otherwise specified.
  • the indoor unit 100 supplies conditioned air (air that has been heat-exchanged by an indoor heat exchanger described later) to an air-conditioning target area such as a room by using a refrigeration cycle that circulates refrigerant.
  • a housing 100 a of the indoor unit 100 includes a base 1 fixed to the indoor wall surface and a design panel 2 attached to the front surface of the base 1.
  • a suction port 3 for sucking room air into the interior is formed on the upper surface of the design panel 2.
  • chamber interior is formed in the lower surface of the design panel 2, and the blower outlet 4 is open
  • the wind direction adjusting device includes upper and lower wind direction plates 2a and 2b for controlling the vertical wind direction of the blown air and left and right wind direction plates 1a and 1b for controlling the left and right wind directions of the blown air.
  • the up / down wind direction plate 2a and the left / right wind direction plate 1a are arranged on the right side of the air outlet 4, and the up / down air direction plate 2b and the left / right air direction plate 1b are arranged on the left side of the air outlet 4, and the right side and the left side in the air outlet 4 are independent.
  • the wind direction can be adjusted.
  • the housing 100a includes indoor heat exchangers 10a and 10b arranged adjacent to the left and right, and indoor fans 20a and 20b provided corresponding to the indoor heat exchangers 10a and 10b, respectively. Yes.
  • the housing 100a further includes fan motors 30a and 30b (30b not shown) for driving the indoor fans 20a and 20b, respectively.
  • the indoor heat exchangers 10a and 10b are fin-and-tube heats provided with a plurality of fins 11 arranged at intervals, and a plurality of heat transfer tubes 12 that pass through the plurality of fins 11 and through which the refrigerant passes. Consists of exchangers.
  • the indoor heat exchangers 10a and 10b have a W-shape when viewed from the right side or the left side, but this shape is merely an example, and is not limited to this shape.
  • the indoor fans 20a and 20b are disposed on the downstream side of the suction port 3 and on the upstream side of the indoor heat exchangers 10a and 10b, and are configured by, for example, a propeller fan or a line flow fan.
  • the air path from the inlet 3 to the outlet 4 is roughly divided into a right air path 5a and a left air path 5b.
  • the indoor heat exchanger 10a and the indoor fan 20a are arrange
  • the indoor heat exchanger 10b and the indoor fan 20b are arrange
  • the blower outlet 4 has the right blower outlet 4a connected to the right wind path 5a, and the left blower outlet 4b connected to the left wind path 5b.
  • each indoor fan 20a, 20b passes through the corresponding indoor heat exchanger 10a, 10b, and the air direction is controlled independently by each air direction adjusting device, and the right air outlet 4a and the left air outlet 4b. It is configured to be supplied indoors.
  • a partition plate may or may not be provided between the right air passage 5a and the left air passage 5b.
  • the indoor unit 100 configured as described above has a configuration in which two sets of an indoor heat exchanger and an indoor fan are provided on the left and right. For this reason, by changing the rotation speed of the indoor fans 20a and 20b on the left and right, it is possible to blow out blown air having different temperatures at the right outlet 4a and the left outlet 4b. Further, the first embodiment is characterized in that it is possible to blow out blown air having different temperatures at the right outlet 4a and the left outlet 4b even when the rotational speeds of the indoor fans 20a and 20b are the same. And Hereinafter, the refrigerant circuit configuration that enables this will be described.
  • FIG. 4 is a diagram showing a refrigerant circuit of the air conditioner according to Embodiment 1 of the present invention.
  • the air conditioner includes an indoor unit 100 and an outdoor unit 200.
  • the indoor unit 100 includes a switching device 40 in addition to the indoor heat exchangers 10a and 10b and the indoor fans 20a and 20b.
  • the indoor heat exchanger 10a, the indoor heat exchanger 10b, and the switching apparatus 40 are connected by piping, and the indoor side refrigerant circuit is comprised. More specifically, the indoor heat exchanger 10a and the indoor heat exchanger 10b are connected in parallel to form a parallel circuit, and the switching device 40 is connected to one end of the parallel circuit so that the indoor refrigerant circuit is It is configured.
  • the switching device 40 is a device that switches the flow of the refrigerant in the indoor refrigerant circuit, and specifically, a flow rate adjustment valve that distributes the refrigerant flowing into the indoor unit 100 to the indoor heat exchanger 10a and the indoor heat exchanger 10b. It consists of As will be described in detail below, in the first embodiment, the heat exchange capacity of the indoor heat exchangers 10a and 10b is increased by changing the flow rate of the refrigerant flowing through the indoor heat exchanger 10a and the indoor heat exchanger 10b using the flow rate adjusting valve. I try to make them different from each other.
  • the refrigerant exchange capacity changing device of the present invention has at least a switching device for switching the refrigerant flow in the indoor refrigerant circuit, and the switching device 40 corresponds to the switching device.
  • the outdoor unit 200 includes a compressor 201, a four-way valve 202, an outdoor heat exchanger 203, an outdoor fan 204, and a pressure reducing device 205. And the compressor 201, the four-way valve 202, the outdoor heat exchanger 203, and the pressure reduction device 205 are connected by piping, and the outdoor side refrigerant circuit is comprised.
  • Compressor 201 sucks refrigerant and compresses the refrigerant to a high temperature and high pressure state.
  • the compressor 201 may have a variable operating capacity (frequency) or may have a constant capacity.
  • the four-way valve 202 switches the refrigerant circulation direction between the cooling operation and the heating operation.
  • the outdoor heat exchanger 203 is configured by a fin-and-tube heat exchanger.
  • the decompression device 205 is composed of an expansion valve whose opening degree can be adjusted.
  • the expansion valve may be an electronic expansion valve that can variably adjust the opening of the throttle by a stepping motor (not shown).
  • a mechanical expansion valve employing a diaphragm for the pressure receiving portion or a temperature expansion valve may be used.
  • the decompression device 205 may be of other types as long as it plays a similar role, such as a capillary tube.
  • the outdoor refrigerant circuit and the indoor refrigerant circuit are connected by piping to form a refrigerant circuit.
  • the refrigerant circuit thus configured is sealed.
  • HFC-R32 is sealed in the first embodiment, but other refrigerants may be used.
  • HFC-R410A, HFO-1234yf, HFO-1234ze, CO 2 , etc. may be used any refrigerant if the refrigerant used in the refrigeration cycle.
  • the air conditioner is further provided with a control device 300 that controls the entire air conditioner.
  • FIG. 4 illustrates a configuration in which the control device 300 is provided only in the outdoor unit 200.
  • the indoor unit 100 is provided with an indoor control device having a part of the function of the control device 300, and You may make it the structure which performs a cooperation process by performing data communication between control apparatuses.
  • the control device 300 can be configured by hardware such as a circuit device that realizes the function, or can be configured by an arithmetic device such as a microcomputer or a CPU and software executed thereon.
  • the control device 300 performs the operation by switching between the cooling operation and the heating operation by switching the four-way valve 202. Further, the control device 300 switches to the normal heating operation, the double condensation operation, and the one-way heating operation by switching the switching device 40 of the indoor unit 100 in a state where the four-way valve 202 is switched to the heating operation side. In addition, the control device 300 switches to the normal cooling operation, the double evaporation operation, and the one-way cooling operation by switching the indoor unit switching device 40 in a state where the four-way valve 202 is switched to the cooling operation side.
  • the two-condensing operation and the two-evaporating operation correspond to the two-temperature blowing operation of the present invention.
  • the first embodiment is characterized in that it is possible to blow out blown air having different temperatures while keeping the rotation speeds of the indoor fans 20a and 20b the same. It is performed by operation and divaporation operation.
  • the operation of the air conditioner for each operation performed by the air conditioner including these operations will be described.
  • Heating operation Hereinafter, (1) normal heating operation, (2) double condensation operation, and (3) one-way operation will be described in order.
  • the four-way valve 202 is switched to the state shown by the solid line in FIG. This is common to all the operations (1) to (3).
  • the normal heating operation is an operation in which the condensing temperatures in the indoor heat exchangers 10a and 10b are the same, and the hot air blowing temperatures in the right outlet 4a and the left outlet 4b are the same. .
  • FIG. 5 is a Ph diagram during normal heating operation in the air conditioner according to Embodiment 1 of the present invention.
  • the horizontal axis indicates enthalpy [kJ / kg], and the vertical axis indicates pressure [MPa].
  • the heat exchanger in the process is also illustrated in the vicinity of lines indicating the condensation process and the evaporation process. That is, the heat exchanger with dots indicates the indoor heat exchangers 10a and 10b, and the heat exchanger without dots indicates the outdoor heat exchanger 203.
  • the dotted line in FIG. 5 has shown the isothermal line, and has shown the standard temperature conditions at the time of heating operation.
  • the upper dotted line is the standard room temperature (for example, 20 ° C.)
  • the lower dotted line is the standard outside air temperature (for example, 7 ° C.). This dotted line is the same in each Ph diagram of the heating operation below.
  • the switching device 40 is switched so that the refrigerant flowing into the indoor unit 100 is evenly distributed between the indoor heat exchanger 10a and the indoor heat exchanger 10b.
  • the refrigerant discharged from the compressor 201 (state A) passes through the four-way valve 202 and is then equally divided into two, and each refrigerant flows into the indoor heat exchangers 10a and 10b, respectively.
  • the refrigerant flowing into the indoor heat exchangers 10a and 10b exchanges heat with the air from the indoor fans 20a and 20b to be condensed and liquefied (state B), and merges at the switching device 40.
  • the refrigerant joined by the switching device 40 is decompressed by the decompression device 205 (state C).
  • the refrigerant decompressed by the decompression device 205 flows into the outdoor heat exchanger 203, exchanges heat with the air from the outdoor fan 204 and evaporates (state D), and then returns to the compressor 201 via the four-way valve 202. End one cycle.
  • the room is heated by repeating the above cycle continuously.
  • the condensing temperature in each is the same. For this reason, warm air of the same temperature is blown out from each of the right outlet 4a and the left outlet 4b in a state where the indoor fans 20a and 20b are operating at the same rotational speed.
  • the two-condensation operation forms hot air having different temperatures at the same air flow rate by changing the refrigerant flow amount distributed to each of the indoor heat exchanger 10a and the indoor heat exchanger 10b during the heating operation. Driving.
  • FIG. 6 is a Ph diagram at the time of the double condensation operation in the air conditioner according to Embodiment 1 of the present invention.
  • FIG. 6 shows a case where the refrigerant is distributed by the switching device 40 so that the refrigerant flows to the indoor heat exchanger 10a less than the indoor heat exchanger 10b.
  • ⁇ indicates the refrigerant state in the indoor heat exchanger 10a
  • ⁇ indicates the refrigerant state in the indoor heat exchanger 10b.
  • the refrigerant (state A) discharged from the compressor 201 in the two-condensing operation passes through the four-way valve 202 and is then distributed to the indoor heat exchanger 10a and the indoor heat exchanger 10b. Then, each refrigerant flows into the indoor heat exchangers 10a and 10b functioning as condensers, exchanges heat with the air from the indoor fans 20a and 20b, and condenses, so that the high-pressure liquid refrigerant (state B1) and the high-pressure two-phase refrigerant are condensed. (State B2). Each refrigerant is merged by the switching device 40 and then depressurized by the decompression device 205 to become a low-pressure two-phase refrigerant (state C).
  • the low-pressure two-phase refrigerant flows into the outdoor heat exchanger 203, exchanges heat with the air from the outdoor fan 204 and evaporates (state D), returns to the compressor 201 via the four-way valve 202, and completes one cycle. .
  • the room is heated by repeating the above cycle continuously.
  • the refrigerant flowing into the indoor unit 100 is distributed to the indoor heat exchanger 10a less than the indoor heat exchanger 10b.
  • the amount of heat exchange in the indoor heat exchanger 10a is smaller than that in the indoor heat exchanger 10b. Therefore, in a state where the indoor fans 20a and 20b are operating at the same rotation speed, the temperature of the air after passing through the indoor heat exchanger 10a is lower than the temperature after passing through the indoor heat exchanger 10b. Therefore, warm air having a temperature lower than that of the left outlet 4b is blown out from the right outlet 4a.
  • the one-side heating operation is an operation for heating only one of the indoor heat exchanger 10a and the indoor heat exchanger 10b.
  • the switching device 40 is switched so that the refrigerant passes through only one of the indoor heat exchanger 10a and the indoor heat exchanger 10b. Further, the operation of the indoor fan corresponding to the indoor heat exchanger through which the refrigerant does not pass is stopped.
  • FIG. 7 is a Ph diagram during one-way heating operation in the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • FIG. 7 shows a case where the switching device 40 is switched so that the refrigerant flows only in the indoor heat exchanger 10a.
  • the refrigerant (state A) discharged from the compressor 201 passes through the four-way valve 202 and then flows into the indoor heat exchanger 10a.
  • the refrigerant flowing into the indoor heat exchanger 10a exchanges heat with the air from the indoor fan 20a to be condensed and liquefied (state B), and then passes through the switching device 40.
  • the refrigerant that has passed through the switching device 40 is decompressed by the decompression device 205 (state C).
  • the refrigerant decompressed by the decompression device 205 flows into the outdoor heat exchanger 203, exchanges heat with the air from the outdoor fan 204 and evaporates (state D), and then returns to the compressor 201 via the four-way valve 202. End one cycle.
  • the room is heated by repeating the above cycle continuously.
  • ZEH Net Zero Energy House
  • the air conditioner of the first embodiment includes two indoor heat exchangers 10a and 10b. From a different point of view, there are two indoor heat exchangers that have conventionally been one in the casing of the indoor unit. The structure is divided into two. For this reason, one-way heating operation is performed, and the refrigerant is theoretically operated at the lowest frequency by causing the refrigerant to flow through only one of the two indoor heat exchangers 10a and 10b. Sometimes it is possible to drop the ability by half. That is, when the air conditioning load is small, it is possible to reduce the capacity of the air conditioner to the capacity commensurate with the air conditioning load, which can contribute to the reduction of power consumption. And by flowing a refrigerant through both the indoor heat exchangers 10a and 10b, it is also possible to supply the ability to cover the starting load when a high-capacity operation is required. This also applies to the one-side cooling operation described later.
  • the normal cooling operation is an operation in which the evaporating temperature in each of the indoor heat exchangers 10a and 10b is the same, and the blowing temperature of the cold air is the same in each of the right outlet 4a and the left outlet 4b.
  • FIG. 8 is a Ph diagram during normal cooling operation in the air conditioner according to Embodiment 1 of the present invention.
  • a dotted line indicates an isotherm, and indicates a standard temperature condition during cooling operation.
  • the upper dotted line is the standard outside air temperature (for example, 25 ° C.), and the lower dotted line is the standard room temperature (for example, 27 ° C.). This dotted line is the same in the Ph diagrams of the following cooling operation.
  • the switching device 40 is switched so that the refrigerant flowing into the indoor unit 100 is evenly distributed between the indoor heat exchanger 10a and the indoor heat exchanger 10b.
  • the refrigerant discharged from the compressor 201 (state A) passes through the four-way valve 202 and then flows into the outdoor heat exchanger 203 that functions as a condenser.
  • the refrigerant flowing into the outdoor heat exchanger 203 exchanges heat with the air from the outdoor fan 204 to be condensed and liquefied (state B).
  • the condensed and liquefied refrigerant is decompressed by the decompression device 205 (state C).
  • the refrigerant decompressed by the decompression device 205 is equally divided into two by the switching device 40, and each refrigerant flows into the indoor heat exchangers 10a and 10b functioning as evaporators.
  • the refrigerant flowing into the indoor heat exchangers 10a and 10b exchanges heat with the air from the indoor fans 20a and 20b and evaporates (state D), and then merges. Then, the merged refrigerant passes through the four-way valve 202 and is again sucked into the compressor 201 to complete one cycle. The room is cooled by repeating the above cycle continuously.
  • the refrigerant that has flowed into the indoor unit 100 is evenly distributed to the indoor heat exchanger 10a and the indoor heat exchanger 10b by the switching device 40, the evaporation temperatures thereof are the same. For this reason, in the state which the indoor fans 20a and 20b operate
  • the two-evaporation operation is an operation for forming cold air having different temperatures at the same air flow rate by differentiating the evaporation temperature in each of the indoor heat exchanger 10a and the indoor heat exchanger 10b during the cooling operation. is there.
  • FIG. 9 is a diagram showing the refrigerant flow during the double evaporation operation in the air conditioner according to Embodiment 1 of the present invention.
  • FIG. 9 shows a case where the refrigerant is distributed by the switching device 40 so that less refrigerant flows through the indoor heat exchanger 10a than the indoor heat exchanger 10b.
  • ⁇ indicates the refrigerant state in the indoor heat exchanger 10a
  • ⁇ indicates the refrigerant state in the indoor heat exchanger 10b.
  • the refrigerant discharged from the compressor 201 passes through the four-way valve 202 and then flows into the outdoor heat exchanger 203 and exchanges heat with the air from the outdoor fan 204 and condenses (state B).
  • the condensed refrigerant is decompressed by the decompression device 205, and then flows into the indoor heat exchanger 10a and the indoor heat exchanger 10b by being distributed by the switching device 40b.
  • the refrigerant in the state C1 distributed to the indoor heat exchanger 10a side and the refrigerant in the state C2 distributed to the indoor heat exchanger 10b side are evaporated by exchanging heat with the air from the indoor fans 20a and 20b.
  • Merge (state D).
  • the merged refrigerant returns to the compressor 201 via the four-way valve 202 and ends one cycle. The room is cooled by repeating the above cycle continuously.
  • the refrigerant flowing into the indoor unit 100 is distributed by the switching device 40 so that the refrigerant flow rate of the indoor heat exchanger 10a is smaller than that of the indoor heat exchanger 10b. For this reason, the amount of heat exchange in the indoor heat exchanger 10a is smaller than that in the indoor heat exchanger 10b. Therefore, the cold air blown out from the right air outlet 4a of the right air passage 5a having the indoor heat exchanger 10a has a temperature higher than the cold air blown out from the left air outlet 4b of the left air passage 5b having the indoor heat exchanger 10b. Get higher.
  • the one-way cooling operation is an operation in which only one of the indoor heat exchanger 10a and the indoor heat exchanger 10b is cooled.
  • the switching device 40 is switched so that the refrigerant flows only in one of the indoor heat exchanger 10a and the indoor heat exchanger 10b. Further, the operation of the indoor fan corresponding to the indoor heat exchanger through which the refrigerant does not pass is stopped.
  • FIG. 10 is a Ph diagram during one-way cooling operation in the air conditioner according to Embodiment 1 of the present invention.
  • the switching device 40 is switched so that the refrigerant flows only in the indoor heat exchanger 10a.
  • the refrigerant (state A) discharged from the compressor 201 passes through the four-way valve 202 and then flows into the outdoor heat exchanger 203.
  • the refrigerant flowing into the indoor heat exchanger 10a exchanges heat with the air from the indoor fan 20a and condenses (state B).
  • the condensed refrigerant is decompressed by the decompression device 205 (state C), and then passes through the switching device 40 and flows into the indoor heat exchanger 10a.
  • the refrigerant flowing into the indoor heat exchanger 10a evaporates by exchanging heat with the air from the indoor fan 20a (state D), then passes through the four-way valve 202 and is again sucked into the compressor 201 to complete one cycle. .
  • the room is cooled by repeating the above cycle continuously.
  • the indoor heat exchanger 10a and the indoor heat exchanger are changed by changing the refrigerant flow rates between the indoor heat exchanger 10a and the indoor heat exchanger 10b by the switching device 40.
  • Each heat exchange capability with 10b can be changed.
  • the indoor heat exchanger 10a and the indoor heat exchanger 10b are connected in parallel to form a parallel circuit. Since the switching device 40 connected to one end of the parallel circuit is a flow rate adjusting valve, the refrigerant flowing into the indoor unit 100 can be distributed to the indoor heat exchanger 10a and the indoor heat exchanger 10b.
  • the switching device 40 is a flow rate adjusting valve, and the flow rate of the refrigerant distributed to the indoor heat exchanger 10a and the indoor heat exchanger 10b is controlled by controlling the flow rate adjusting valve so that the indoor heat exchanger 10a and the indoor heat are changed.
  • Each heat exchange capability with the exchanger 10b can be changed.
  • blower outlet 4 is divided into right and left and constitutes the right blower outlet 4a and the left blower outlet 4b, the blown air can be individually blown to each user in the room. Can be improved.
  • FIG. 11 is a diagram showing a refrigerant circuit of Modification 1 of the air conditioner according to Embodiment 1 of the present invention.
  • the switching device 40 is configured to be provided downstream of the indoor heat exchangers 10 a and 10 b in the flow of the heating operation.
  • the switching device 40 is provided upstream of the indoor heat exchangers 10 a and 10 b. It has a configuration with.
  • the state change of the refrigerant in the refrigerant circuit of Modification 1 will be described for each of the double condensation operation and the double evaporation operation.
  • the normal heating operation, the normal cooling operation, and the one-side operation are the same as the refrigerant circuit shown in FIG.
  • FIG. 12 is a Ph diagram during two-condensing operation in Modification 1 of the air conditioner according to Embodiment 1 of the present invention.
  • ⁇ indicates the refrigerant state in the indoor heat exchanger 10a
  • ⁇ indicates the refrigerant state in the indoor heat exchanger 10b.
  • the refrigerant (state A) discharged from the compressor 201 in the two-condensing operation passes through the four-way valve 202 and is then distributed to the indoor heat exchanger 10a and the indoor heat exchanger 10b by the switching device 40. Then, each refrigerant flows into the indoor heat exchangers 10a and 10b functioning as condensers, exchanges heat with the air from the indoor fans 20a and 20b, and condenses, so that the high-pressure liquid refrigerant (state B1) and the high-pressure two-phase refrigerant are condensed. (State B2). After merging, the refrigerant is decompressed by the decompression device 205 to become a low-pressure two-phase refrigerant (state C).
  • the low-pressure two-phase refrigerant flows into the outdoor heat exchanger 203, exchanges heat with the air from the outdoor fan 204 and evaporates (state D), returns to the compressor 201 via the four-way valve 202, and completes one cycle. .
  • the room is heated by repeating the above cycle continuously.
  • the refrigerant flowing into the indoor unit 100 is distributed to the indoor heat exchanger 10a less than the indoor heat exchanger 10b.
  • the amount of heat exchange in the indoor heat exchanger 10a is smaller than that in the indoor heat exchanger 10b. Therefore, in a state where the indoor fans 20a and 20b are operating at the same rotation speed, the temperature of the air after passing through the indoor heat exchanger 10a is lower than the temperature after passing through the indoor heat exchanger 10b. Therefore, warm air having a temperature lower than that of the left outlet 4b is blown out from the right outlet 4a.
  • FIG. 13 is a diagram showing the flow of the refrigerant during the two-evaporation operation in Modification 1 of the air conditioner according to Embodiment 1 of the present invention.
  • FIG. 13 shows a case where the refrigerant is distributed by the switching device 40 so that less refrigerant flows in the indoor heat exchanger 10a than in the indoor heat exchanger 10b.
  • ⁇ indicates the refrigerant state in the indoor heat exchanger 10a
  • ⁇ indicates the refrigerant state in the indoor heat exchanger 10b.
  • the refrigerant discharged from the compressor 201 passes through the four-way valve 202 and then flows into the outdoor heat exchanger 203 and exchanges heat with the air from the outdoor fan 204 and condenses (state B).
  • the condensed refrigerant is decompressed by the decompression device 205 (state C).
  • the decompressed refrigerant is distributed and flows into the indoor heat exchanger 10a and the indoor heat exchanger 10b.
  • the refrigerant distributed to the indoor heat exchanger 10a and the indoor heat exchanger 10b exchanges heat with the air from the outdoor fan 204 and evaporates (state D1, state D2), and then merges at the switching device 40.
  • the merged refrigerant returns to the compressor 201 via the four-way valve 202 and ends one cycle.
  • the room is cooled by repeating the above cycle continuously.
  • the refrigerant flowing into the indoor unit 100 is distributed by the switching device 40 so that the refrigerant flow rate of the indoor heat exchanger 10a is smaller than that of the indoor heat exchanger 10b. For this reason, the amount of heat exchange in the indoor heat exchanger 10a is smaller than that in the indoor heat exchanger 10b. Therefore, the cold air blown out from the right air outlet 4a of the right air passage 5a having the indoor heat exchanger 10a has a temperature higher than the cold air blown out from the left air outlet 4b of the left air passage 5b having the indoor heat exchanger 10b. Get higher.
  • Embodiment 2 the two-condensing operation and the two-evaporating operation are performed as the two-temperature blowing operation that forms the blowing air having different temperatures when the air volume is the same.
  • a simultaneous cooling and heating operation in which cool air and warm air are simultaneously blown out from the indoor unit 100 is enabled.
  • FIG. 14 is a diagram showing a refrigerant circuit of the air conditioner according to Embodiment 2 of the present invention.
  • an indoor heat exchanger 10a, an indoor heat exchanger 10b, and a decompression device 50 are connected in parallel to form a parallel circuit, and switching devices 40a and 40b are connected to both ends of the parallel circuit. Are connected.
  • the switching devices 40a and 40b and the decompression device 50 constitute the refrigerant exchange capacity changing device of the present invention.
  • the decompression device 50 is composed of an expansion valve whose opening degree can be adjusted.
  • the expansion valve may be an electronic expansion valve that can variably adjust the opening of the throttle by a stepping motor (not shown).
  • a mechanical expansion valve employing a diaphragm for the pressure receiving portion or a temperature expansion valve may be used.
  • the decompression device 205 may be of other types as long as it plays a similar role, such as a capillary tube. In the following description, it is assumed that an electronic expansion valve is used.
  • the switching devices 40a and 40b are configured by four-way switching valves that can switch the flow path in four directions.
  • the switching devices 40a and 40b switch the connection between the connection ports 101a and 101b of the indoor unit 100 with the outdoor unit 200 and each device constituting the indoor refrigerant circuit.
  • a 1st state is a state connected to the end of the indoor heat exchanger 10a, and the end of the indoor heat exchanger 10b (refer FIG. 15, FIG. 22).
  • the second state is a state in which the connection port 101a is connected to one end of the indoor heat exchanger 10a and one end of the decompression device 50 is connected to one end of the indoor heat exchanger 10b (see FIGS. 17 and 21).
  • the third state is a state in which the connection port 101a is connected to one end of the indoor heat exchanger 10b and one end of the decompression device 50 is connected to one end of the indoor heat exchanger 10a.
  • a 4th state is a state connected to the other end of the indoor heat exchanger 10a, and the other end of the indoor heat exchanger 10b (refer FIG. 15, FIG. 22).
  • the fifth state is a state in which the connection port 101b is connected to the other end of the indoor heat exchanger 10a and the other end of the decompression device 50 is connected to the other end of the indoor heat exchanger 10b (FIGS. 21 and 24).
  • the sixth state is a sixth state in which the connection port 101b is connected to the other end of the indoor heat exchanger 10b and the other end of the decompression device 50 is connected to the other end of the indoor heat exchanger 10a (see FIG. 17). ).
  • the indoor refrigerant circuit is switched between the switching devices 40a and 40b so that the parallel flow path (see FIGS. 15 and 22), the serial flow path (see FIGS. 17 and 24), and the single flow path (see FIGS. 21 and 27). Can be switched to.
  • a parallel flow path is a flow path through which a refrigerant flows in parallel to the indoor heat exchangers 10a and 10b.
  • the serial flow path is a flow path in which the refrigerant flows to one of the indoor heat exchangers 10a and 10b and then flows to the other.
  • One channel is a channel through which the refrigerant flows only in one of the indoor heat exchangers 10a and 10b.
  • the operation is performed by switching between the cooling operation and the heating operation by switching the four-way valve 202.
  • the control device 300 switches between the normal heating operation, the double condensation operation, the cooling / heating simultaneous operation, and the one-side heating operation during the heating operation by switching the switching devices 40a and 40b.
  • the operation is switched to the normal cooling operation, the double condensation operation, the simultaneous cooling / heating operation, and the one-way cooling operation.
  • Two-condensing operation, simultaneous cooling / heating operation (during heating), double evaporation operation, and simultaneous cooling / heating operation (during cooling) correspond to the two-temperature blowing operation of the present invention.
  • the two-temperature blowing operation during the heating operation is a two-condensing operation in which both the indoor heat exchangers 10a and 10b function as a condenser, and one of the indoor heat exchangers 10a and 10b functions as a condenser and the other as an evaporator. These operations are switched under the control of the decompression device 50.
  • the two-temperature blowing operation during the cooling operation is a double evaporation operation in which both of the indoor heat exchangers 10a and 10b function as an evaporator, and one of the indoor heat exchangers 10a and 10b is a condenser and the other is an evaporator.
  • the cooling and heating simultaneous operation is performed, and these are switched by the control of the decompression device 50.
  • the control of the decompression device 50 is performed by the control device 300.
  • FIG. 15 is a diagram illustrating a refrigerant flow during normal heating operation in the air conditioner according to Embodiment 2 of the present invention.
  • arrows indicate the flow of the refrigerant.
  • FIG. 16 is a Ph diagram during normal heating operation in the air conditioner according to Embodiment 2 of the present invention.
  • a to D in FIG. 16 indicate refrigerant states at the respective piping positions shown in A to D of FIG.
  • the switching device 40a is switched to the first state and the switching device 40a is switched to the fourth state, thereby forming a parallel flow path. Then, after the refrigerant (state A) discharged from the compressor 201 passes through the four-way valve 202, the refrigerant is equally divided into two by the switching device 40a, and each refrigerant flows into the indoor heat exchangers 10a and 10b, respectively. To do.
  • the refrigerant that has flowed into the indoor heat exchangers 10a and 10b exchanges heat with the air from the indoor fans 20a and 20b to be condensed and liquefied (state B), and then merges in the switching device 40b.
  • the refrigerant that has passed through the switching device 40b is decompressed by the decompression device 205 (state C).
  • the refrigerant depressurized by the decompression device 205 evaporates by exchanging heat with the air from the outdoor fan 204 in the outdoor heat exchanger 203 (state D), then passes through the four-way valve 202 and is sucked into the compressor 201 again. End one cycle.
  • the room is heated by repeating the above cycle continuously.
  • FIG. 17 is a diagram showing the refrigerant flow during the two-condensing operation in the air conditioner according to Embodiment 2 of the present invention.
  • the arrows indicate the flow of the refrigerant.
  • FIG. 18 is a Ph diagram at the time of the double condensation operation in the air conditioner according to Embodiment 2 of the present invention.
  • a to D in FIG. 18 indicate refrigerant states at the respective piping positions shown in A to D of FIG.
  • the switching devices 40a and 40b perform the indoor refrigerant circuit as a series flow path.
  • the double condensation operation will be described using an example in which the first route is set.
  • the refrigerant (state A) discharged from the compressor 201 passes through the switching device 40a after passing through the four-way valve 202.
  • the refrigerant that has passed through the switching device 40a flows into the indoor heat exchanger 10a that functions as a condenser, is condensed by exchanging heat with the air from the indoor fan 20a, and becomes a high-pressure two-phase refrigerant (state B1).
  • the high-pressure two-phase refrigerant is decompressed by the decompression device 50 after passing through the switching device 40b (state B2).
  • the refrigerant decompressed by the decompression device 50 flows into the indoor heat exchanger 10b after passing through the switching device 40a, exchanges heat with the air from the indoor fan 20b, and further condenses (state B3).
  • decompression device 50 decompression is performed in a range that does not fall below the "pressure P1 corresponding to the standard room temperature" so that the indoor heat exchanger 10b functions as a condenser.
  • the refrigerant condensed in the indoor heat exchanger 10b passes through the switching device 40b and is then depressurized by the decompression device 205 (state C).
  • the pressure is reduced to a pressure lower than “pressure P2 corresponding to the standard outside air temperature” so that the outdoor heat exchanger 203 functions as an evaporator.
  • the refrigerant decompressed by the decompression device 205 is evaporated by exchanging heat with the air from the outdoor fan 204 in the outdoor heat exchanger 203 (state D), and then returns to the compressor 201 via the four-way valve 202. End the cycle.
  • the room is heated by repeating the above cycle continuously.
  • the refrigerant flowing out of the indoor heat exchanger 10a is decompressed by the decompression device 50 and flows into the indoor heat exchanger 10b. Therefore, the condensation temperature of the downstream indoor heat exchanger 10b is equal to the upstream indoor heat exchanger. It becomes lower than the condensation temperature of 10a. For this reason, in a state where the indoor fans 20a and 20b are operating at the same rotation speed, the temperature of the air after passing through the indoor heat exchanger 10b is lower than the temperature after passing through the indoor heat exchanger 10a. Therefore, the temperature of the warm air blown from the left outlet 4b is lower than the temperature of the warm air blown from the right outlet 4a.
  • the pressure is reduced by the decompression device 50 provided between the indoor heat exchanger 10a and the indoor heat exchanger 10b in the series flow path, so that the indoor heat exchanger 10a and the indoor heat exchanger 10b are reduced.
  • Each condensing temperature can be changed. As a result, it is possible to form hot air having different temperatures at the same air volume.
  • the indoor side refrigerant circuit is switched to the first forward path of the series flow path by the switching devices 40a and 40b, and the refrigerant flows in the order of the indoor heat exchanger 10a, the decompression device 50, and the indoor heat exchanger 10b.
  • the indoor refrigerant circuit is set to the first forward path through which the refrigerant flows in the order of the indoor heat exchanger 10a, the decompression device 50, and the indoor heat exchanger 10b.
  • FIG. 19 is a plan view showing a preferred indoor environment using the simultaneous cooling and heating operation.
  • a living dining kitchen is required to air-condition both the kitchen 110 and the living room 120 with a single air conditioner.
  • the living room 120 is required to supply hot air as a countermeasure against the cold, and the kitchen 110 that is hot due to the use of cooking appliances is required to supply cold air.
  • Cold air blowing can be performed. As a result, space comfort can be improved.
  • FIG. 20 is a Ph diagram during simultaneous cooling and heating in the air conditioner according to Embodiment 2 of the present invention.
  • the refrigerant flow during the simultaneous cooling and heating operation is the same as that during the double condensation operation shown in FIG. A to D in FIG. 20 indicate refrigerant states at the respective piping positions shown in A to D of FIG.
  • the refrigerant (state A) discharged from the compressor 201 passes through the switching device 40a after passing through the four-way valve 202.
  • the refrigerant that has passed through the switching device 40a flows into the indoor heat exchanger 10a that functions as a condenser, is condensed by exchanging heat with the air from the indoor fan 20a, and becomes a high-pressure two-phase refrigerant (state B1).
  • the high-pressure two-phase refrigerant is decompressed by the decompression device 50 after passing through the switching device 40b (state B2).
  • the refrigerant decompressed by the decompression device 50 flows into the indoor heat exchanger 10b after passing through the switching device 40a, evaporates by exchanging heat with the air from the indoor fan 20b (state B3).
  • the pressure is reduced to a pressure lower than the "pressure P1 corresponding to the standard room temperature" so that the indoor heat exchanger 10b functions as an evaporator.
  • the refrigerant evaporated in the indoor heat exchanger 10b passes through the switching device 40b and is then decompressed by the decompression device 205 (state C).
  • the pressure is reduced to a pressure lower than “pressure P2 corresponding to the standard outside air temperature” so that the outdoor heat exchanger 203 functions as an evaporator.
  • the refrigerant decompressed by the decompression device 205 is evaporated by exchanging heat with the air from the outdoor fan 204 in the outdoor heat exchanger 203 (state D), and then returns to the compressor 201 via the four-way valve 202. End the cycle.
  • the refrigerant flowing out of the indoor heat exchanger 10a is decompressed by the decompression device 50 to a pressure lower than the “pressure P1 corresponding to the standard room temperature”.
  • the indoor heat exchanger 10a on the upstream side functions as a condenser
  • the indoor heat exchanger 10b on the downstream side functions as an evaporator. Therefore, it is possible to form winds having different temperatures when the air volume is the same, and warm air is blown out from the right outlet 4a and cold air is blown out from the left outlet 4b.
  • the indoor side refrigerant circuit is switched to the first forward path of the series flow path by the switching devices 40a and 40b, and the refrigerant flows in the order of the indoor heat exchanger 10a, the decompression device 50, and the indoor heat exchanger 10b.
  • one of the indoor heat exchangers 10a and 10b is used as a condenser and the other is used as an evaporator, so that heating and dehumidification can be performed.
  • the dehumidified and dried hot air can be formed by mixing the wind blown from each of the right outlet 4a and the left outlet 4b with the left and right wind direction plates 1a and 1b. Therefore, by blowing the dehumidified and dried warm air toward, for example, clothes that have been dried in the room, it is effective in promoting clothes drying.
  • the switching devices 40a and 40b are switched so as to form a one-way flow path through which the refrigerant flows only in one of the indoor heat exchangers 10a and 10b. Further, the operation of the indoor fan corresponding to the indoor heat exchanger through which the refrigerant does not pass is stopped.
  • FIG. 21 is a diagram showing a refrigerant flow during one-way heating operation in the air-conditioning apparatus according to Embodiment 2 of the present invention.
  • arrows indicate the flow of the refrigerant.
  • the Ph diagram during one-side heating operation is the same as the one-side heating operation of the embodiment shown in FIG.
  • the state of the refrigerant at each of the piping positions A to D in FIG. 21 is shown in A to D in FIG.
  • an example is shown in which the switching device 40a is switched to the second state and the switching device 40b is switched to the fifth state so that the refrigerant flows only in the indoor heat exchanger 10a. It is the same.
  • the switching device 40a is switched to the third state and the switching device 40b is switched to the sixth state so that the refrigerant flows through the indoor heat exchanger 10b. Good.
  • FIG. 22 is a diagram showing a refrigerant flow during a normal cooling operation in the air conditioner according to Embodiment 2 of the present invention.
  • the arrows indicate the flow of the refrigerant.
  • FIG. 23 is a Ph diagram during normal cooling operation in the air conditioner according to Embodiment 2 of the present invention.
  • a to D in FIG. 23 indicate refrigerant states at the respective piping positions shown in A to D of FIG.
  • the switching device 40a is switched to the first state and the switching device 40a is switched to the fourth state, thereby forming a parallel flow path. Then, the refrigerant (state A) discharged from the compressor 201 passes through the four-way valve 202 and then flows into the outdoor heat exchanger 203. The refrigerant flowing into the outdoor heat exchanger 203 is condensed and liquefied by exchanging heat with the air from the outdoor fan 204 (state B), and then decompressed by the decompression device 205.
  • the refrigerant decompressed by the decompression device 205 is equally divided into two by the switching device 40b, and each refrigerant flows into the indoor heat exchangers 10a and 10b (state C).
  • the refrigerant flowing into the indoor heat exchangers 10a and 10b evaporates by exchanging heat with the air from the indoor fans 20a and 20b, and then merges at the switching device 40a, passes through the four-way valve 202, and again enters the compressor 201.
  • Inhaled (state D), one cycle is completed. The room is cooled by repeating the above cycle continuously.
  • FIG. 24 is a diagram illustrating the refrigerant flow during the two-evaporation operation in the air conditioner according to Embodiment 2 of the present invention.
  • FIG. 25 is a Ph diagram during the double evaporation operation in the air conditioner according to Embodiment 2 of the present invention.
  • a to D in FIG. 25 indicate refrigerant states at the respective piping positions shown in A to D of FIG.
  • the switching devices 40a and 40b perform the indoor refrigerant circuit as a series flow path.
  • the other is to switch the switching device 40a to the second state and switch the switching device 40b to the sixth state as shown in FIG.
  • the refrigerant (state A) discharged from the compressor 201 passes through the four-way valve 202, it flows into the outdoor heat exchanger 203 and exchanges heat with the air from the outdoor fan 204 to be condensed and liquefied (state B).
  • the condensed and liquefied refrigerant is decompressed by the decompression device 205.
  • the pressure is reduced to a pressure lower than the “pressure P1 corresponding to the standard room temperature” so that the indoor heat exchanger 10a functions as an evaporator.
  • the refrigerant decompressed by the decompression device 205 passes through the switching device 40b and flows into the indoor heat exchanger 10a functioning as an evaporator (state C1).
  • the refrigerant that has flowed into the indoor heat exchanger 10a exchanges heat with the air from the indoor fan 20a and evaporates, and then passes through the switching device 40a and flows into the decompression device 50 (state C2).
  • the refrigerant flowing into the decompression device 50 is further decompressed by the decompression device 50, passes through the switching device 40b, and then flows into the indoor heat exchanger 10b functioning as an evaporator (state C3).
  • the refrigerant flowing into the indoor heat exchanger 10b exchanges heat with the air from the indoor fan 20b and evaporates (state D), and then passes through the switching device 40a.
  • the refrigerant that has passed through the switching device 40a returns to the compressor 201 via the four-way valve 202 and ends one cycle. The room is cooled by repeating the above cycle continuously.
  • the refrigerant flowing out of the indoor heat exchanger 10a is decompressed by the decompression device 50 and flows into the indoor heat exchanger 10b. Therefore, the evaporation temperature of the downstream indoor heat exchanger 10b is the upstream indoor heat exchanger. It becomes lower than the evaporation temperature of 10a. For this reason, in a state where the indoor fans 20a and 20b are operating at the same rotation speed, the temperature of the air after passing through the indoor heat exchanger 10b is lower than the temperature after passing through the indoor heat exchanger 10a. Therefore, the temperature of the cold air blown from the left outlet 4b is lower than the temperature of the cold wind blown from the right outlet 4a.
  • the pressure is reduced by the decompression device 50 provided between the indoor heat exchanger 10a and the indoor heat exchanger 10b in the series flow path, so that the indoor heat exchanger 10a and the indoor heat exchanger 10b are reduced.
  • Each evaporation temperature can be changed. As a result, it is possible to form cold air having different temperatures when the air volume is the same.
  • the indoor side refrigerant circuit is switched to the first forward path of the series flow path by the switching devices 40a and 40b, and the refrigerant flows in the order of the indoor heat exchanger 10a, the decompression device 50, and the indoor heat exchanger 10b.
  • the decompression device 50 decompresses the refrigerant pressure to be lower than “pressure P1 corresponding to the standard room temperature”. Accordingly, the downstream side of the indoor heat exchangers 10a and 10b is caused to function as an evaporator. And warm air is blown out from the blower outlet corresponding to an indoor heat exchanger of an upstream side, and cold air is blown out from the blower outlet corresponding to a downstream indoor heat exchanger.
  • the cooling and heating simultaneous operation will be described using an example in which the indoor refrigerant circuit is set to the first forward path through which the refrigerant flows in the order of the indoor heat exchanger 10a, the decompression device 50, and the indoor heat exchanger 10b.
  • FIG. 26 is a Ph diagram during simultaneous cooling and heating in the air conditioner according to Embodiment 2 of the present invention.
  • the refrigerant flow during the simultaneous cooling and heating operation is the same as in FIG. 26A to 26D show refrigerant states at the respective piping positions shown in FIGS. 24A to 24D.
  • the refrigerant discharged from the compressor 201 passes through the four-way valve 202 and then flows into the outdoor heat exchanger 203 and exchanges heat with the air from the outdoor fan 204 and condenses (state B).
  • the condensed refrigerant is decompressed by the decompression device 205.
  • the refrigerant decompressed by the decompression device 205 passes through the switching device 40b and flows into the indoor heat exchanger 10a (state C1).
  • the refrigerant pressure is decompressed within a range that does not fall below the “pressure P1 corresponding to the standard room temperature” so that the indoor heat exchanger 10 a functions as a condenser.
  • the refrigerant flowing into the indoor heat exchanger 10a exchanges heat with the air from the indoor fan 20a and condenses, and then passes through the switching device 40a and flows into the decompression device 50 (state C2).
  • the refrigerant flowing into the decompression device 50 is decompressed, passes through the switching device 40b, and then flows into the indoor heat exchanger 10b (state C3).
  • the pressure is reduced to a pressure lower than the "pressure P1 corresponding to the standard room temperature" so that the indoor heat exchanger 10b functions as an evaporator.
  • the refrigerant flowing into the indoor heat exchanger 10b exchanges heat with the air from the indoor fan 20b and evaporates (state D), and then passes through the switching device 40a.
  • the refrigerant that has passed through the switching device 40a returns to the compressor 201 via the four-way valve 202 and ends one cycle.
  • the refrigerant flowing out of the indoor heat exchanger 10a is reduced to a pressure lower than the “pressure P1 corresponding to the standard room temperature” by the pressure reducing device 50 and flows into the indoor heat exchanger 10b.
  • the indoor heat exchanger 10a on the upstream side functions as a condenser
  • the indoor heat exchanger 10b on the downstream side functions as an evaporator. Therefore, it is possible to form winds having different temperatures when the air volume is the same, and warm air is blown out from the right outlet 4a and cold air is blown out from the left outlet 4b.
  • the indoor side refrigerant circuit is switched to the first forward path of the series flow path by the switching devices 40a and 40b, and the refrigerant flows in the order of the indoor heat exchanger 10a, the decompression device 50, and the indoor heat exchanger 10b.
  • the defrost-dried cold air can be formed by mixing the air blown from the right and left air outlets 4a and 4b with the left and right wind direction plates 1a and 1b. Therefore, indoor dehumidification can be performed by supplying cold air that has been dehumidified and dried to the room.
  • the switching devices 40a and 40b are switched so as to form a one-way flow path through which the refrigerant flows only in one of the indoor heat exchangers 10a and 10b. Further, the operation of the indoor fan corresponding to the indoor heat exchanger through which the refrigerant does not pass is stopped.
  • FIG. 27 is a diagram showing a refrigerant flow during one-way cooling operation in the air conditioner according to Embodiment 2 of the present invention.
  • the arrows indicate the flow of the refrigerant.
  • the Ph diagram during one-way cooling operation is the same as that of the first embodiment shown in FIG.
  • the state of the refrigerant at each of the piping positions A to D in FIG. 27 is shown in A to D in FIG.
  • an example is shown in which the switching device 40a is switched to the second state and the switching device 40b is switched to the fifth state so that the refrigerant flows only in the indoor heat exchanger 10a. It is the same.
  • the switching device 40a is switched to the third state and the switching device 40b is switched to the sixth state so that the refrigerant flows through the indoor heat exchanger 10b. Good.
  • the same effect as in the first embodiment can be obtained, and further, simultaneous cooling and heating operation can be performed, and hot air is supplied from one of the right outlet 4a and the left outlet 4b. It is possible to blow cold air from the other side.
  • the switching devices 40a and 40b and the decompression device 50 are provided as the refrigerant exchange capacity changing device, and the four-way switching valve capable of switching the flow path in four directions is used as the switching devices 40a and 40b.
  • the indoor side heat exchanger 10a, the decompression device 50, and the indoor heat exchanger 10b are connected in parallel to the indoor side refrigerant circuit, and the switching device 40a configured by a four-way switching valve at the junction portion at both ends of the parallel circuit;
  • the switching device 40b is connected separately.
  • the switching device 40a is switched from the first state to the third state, and the switching device 40b is switched from the fourth state to the sixth state.
  • the indoor refrigerant circuit can be switched to the parallel flow path, the serial flow path, and the one-way flow path, and can be switched to the normal heating operation, the double condensation operation, the cooling / heating simultaneous operation, and the one-side heating operation during the heating operation. Further, during cooling operation, it is possible to switch to normal cooling operation, double evaporation operation, simultaneous cooling / heating operation, and one-way cooling operation.
  • the serial flow path is configured by switching the switching device 40a to the second state and switching device 40b to the sixth state, or switching the switching device 40a to the third state and switching device 40b to the fifth state. it can. Then, the controller 300 can control the decompression device 50 to perform the two-temperature blowing operation.
  • one of the indoor heat exchangers 10a and 10b is condensed with a double condensation operation or a double evaporation operation in which both the indoor heat exchangers 10a and 10b function as a condenser or an evaporator. And a simultaneous cooling and heating operation in which the other functions as an evaporator.
  • an electronic expansion valve whose opening degree can be adjusted is used as the pressure reducing device 50 here.
  • the pressure reducing device 50 here.
  • the air conditioner of the second embodiment has a configuration in which the indoor refrigerant circuit includes the indoor heat exchangers 10a and 10b, the decompression device 50, and the switching devices 40a and 40b. You may do it.
  • the circuit connection configuration is changed, and the switching devices 40a and 40b are changed from the four-way switching valve to the three-way valve.
  • FIG. 28 is a diagram showing a refrigerant circuit of Modification 1 of the air conditioner according to Embodiment 2 of the present invention.
  • a parallel circuit in which the indoor heat exchanger 10a and the refrigerant pipe 60a are connected in parallel and a parallel circuit in which the indoor heat exchanger 10b and the refrigerant pipe 60b are connected in parallel are provided.
  • the pressure reduction device 50 is connected in series. And in each parallel circuit, it has the structure which provided switching apparatus 40a, 40b in the junction part on the opposite side to the decompression device 50.
  • FIG. Switching device 40a, 40b is comprised by the three-way valve.
  • the switching device 40a connects the connection port 101a to the indoor heat exchanger 10a or the refrigerant pipe 60a.
  • the switching device 40b connects the connection port 101b to the indoor heat exchanger 10b or the refrigerant pipe 60b.
  • the switching devices 40a and 40b and the decompression device 50 constitute the refrigerant exchange capacity changing device of the present invention.
  • a serial flow path is configured in which the refrigerant flows sequentially to both the indoor heat exchangers 10a and 10b by switching the switching device 40a to the indoor heat exchanger 10a side and the switching device 40b to the indoor heat exchanger 10a side. Is done. Further, by switching the switching device 40a to the indoor heat exchanger 10a side and the switching device 40b to the refrigerant pipe 60b side, a one-way flow path through which the refrigerant flows only in the indoor heat exchanger 10a is configured. Further, by switching the switching device 40a to the refrigerant pipe 60a side and the switching device 40b to the indoor heat exchanger 10b side, a one-way flow path through which the refrigerant flows only in the indoor heat exchanger 10b is configured.
  • the air conditioner of Modification 1 configured as described above can basically operate in the same manner as the air conditioner of Embodiment 2 shown in FIG. That is, in a state where the four-way valve 202 is switched to the solid line side in FIG. 14, normal heating operation, double condensation operation, simultaneous cooling / heating operation, and one-way heating operation are possible, and the four-way valve 202 is switched to the dotted line side in FIG. Thus, normal cooling operation, dual evaporation operation, simultaneous cooling and heating operation, and one-way cooling operation are possible.
  • the air conditioner of Modification 1 differs from the air conditioner of Embodiment 2 in terms of operation as follows. That is, in the air conditioner of the second embodiment, the normal flow operation and the normal cooling operation are performed by dividing the refrigerant flow into two and using parallel flow paths that flow in parallel to the indoor heat exchangers 10a and 10b. However, in the first modification, a parallel flow path cannot be realized. For this reason, when performing the normal heating operation and the normal cooling operation in the first modification, the refrigerant flow path is a serial flow path through which the refrigerant flows in order to the indoor heat exchangers 10a and 10b.
  • the flow order of the refrigerant can be switched between the indoor heat exchanger 10a to the indoor heat exchanger 10b and the reverse order by the switching devices 40a and 40b. it can. That is, upstream and downstream can be interchanged.
  • the indoor heat exchanger 10a can be a condenser
  • the indoor heat exchanger 10b can be an evaporator
  • the indoor heat exchanger 10a is an evaporator
  • the indoor heat exchanger 10b is It can also be a condenser.
  • the upstream and downstream cannot be interchanged.
  • the refrigerant flows only in the order from the indoor heat exchanger 10a to the indoor heat exchanger 10b. Therefore, in the simultaneous cooling and heating operation during the heating operation, the warm air is always blown from the indoor heat exchanger 10a and the cold air is blown from the indoor heat exchanger 10b.
  • coolant to either one of indoor heat exchanger 10a, 10b can be comprised by switching of switching apparatus 40a, 40b, about one-side heating operation and one-side cooling operation, it is the said embodiment. Same as 1 and 2.
  • FIG. 29 is a diagram showing a refrigerant circuit of Modification 2 of the air conditioner according to Embodiment 2 of the present invention.
  • the arrangement positions of the switching devices 40a and 40b in the first modification are changed.
  • the switching devices 40a and 40b are provided in the merging portion on the side opposite to the decompression device 50 in each parallel circuit, but in the second modification, the switching device 40a and 40b are provided in the merging portion on the decompression device 50 side.
  • the point which comprises switching apparatus 40a, 40b with a three-way valve is the same as the modification 1.
  • the switching device 40a connects the decompression device 50 to the indoor heat exchanger 10a or the refrigerant pipe 60a.
  • the switching device 40b connects the decompression device 50 to the indoor heat exchanger 10b or the refrigerant pipe 60b.
  • Other configurations are the same as those of the first modification.
  • the switching devices 40a and 40b are separately connected to the confluence portion on the opposite side of the decompression device 50 or the confluence portion on the decompression device 50 side in each parallel circuit. It is not limited. That is, the switching device 40a and the switching device 40b may be separately connected to the confluence portion of each parallel circuit.
  • the switching device 40a is a confluence portion on the opposite side of the decompression device 50, and the switching device 40b is the decompression device. It is good also as a structure connected to the merge part of 50 side.
  • the indoor unit of the present invention is not limited to the above-described structure, and can be variously modified as follows without departing from the gist of the present invention.
  • the example in which the propeller fan is used as the indoor fan and the number of the propeller fans is plural is shown, but the configuration shown in FIG. 30 may be used.
  • FIG. 30 is a diagram illustrating a first modification using a line flow fan in the air conditioner according to the first and second embodiments of the present invention.
  • the line flow fan 20c is used as an indoor fan that blows air into the housing 100b.
  • the indoor fan was provided corresponding to each of two indoor heat exchangers, it is set as the structure provided in common here.
  • indoor heat exchangers 10c and 10d (10d is not shown) are arranged on the left and right in the housing 100b.
  • the indoor heat exchanger has a W shape when viewed from the right side or the left side, but in this modification, it has an inverted V shape.
  • the wind path is divided into upper and lower wind direction plates 2c and 2d, and left and right wind direction plates (not shown) are provided so as to blow right and left.
  • the air sucked from the suction port 3b passes through the indoor heat exchangers 10c and 10d (not shown) and the line flow fan 20c, and then the up and down wind direction plates 2c and 2d and The air direction is controlled by left and right air direction plates (not shown), and the air is blown into the room from the air outlet 4.
  • the number of line flow fans 20c is one, air having different temperatures can be blown to the left and right by performing the two-condensing operation or the two-evaporating operation of the first and second embodiments.
  • FIG. 31 is a diagram showing a second modification using the line flow fan in the air conditioner according to the first and second embodiments of the present invention.
  • the indoor heat exchanger is arranged on the left and right, but in the second modification shown in FIG. 31, the indoor heat exchanger has a structure arranged on the front and rear. That is, the indoor heat exchanger 10e is disposed on the front side in the casing 100b, and the indoor heat exchanger 10f is disposed on the rear side.
  • the point which provided one line flow fan 20c in common with the two indoor heat exchangers 10e and 10f is the same as that of the modification 1.
  • an arrow indicated by a solid line indicates the rotation direction of the line flow fan 20c.
  • arrows A and B indicated by dotted lines in FIG. 31 indicate the flow until the air sucked from the suction port 3b passes through the indoor heat exchanger 10e and the line flow fan 20c and is blown out from the blower outlet 4.
  • An arrow C indicated by a dotted line in FIG. 31 indicates a flow until the air sucked from the suction port 3b passes through the indoor heat exchanger 10f and the line flow fan 20c and is blown out from the blower outlet 4.
  • the heat exchange capacity of the indoor heat exchanger 10f is higher than that of the indoor heat exchanger 10e. Therefore, in the case of the double condensation operation, even when the number of line flow fans 20c is one, the air flow C after passing through the indoor heat exchanger 10f is more than the air flows A and B after passing through the indoor heat exchanger 10e. The temperature rises.
  • the air formed in this way is divided into air paths by the up-and-down air direction plate 2c and the up-and-down air direction plate 2d, and the air direction is controlled to the left and right by the left and right air-direction plates (not shown), whereby a high-temperature air flow C And the low-temperature air flows A and B can be blown to the left and right.
  • the indoor heat exchanger 10f and the indoor heat exchanger 10e may be configured so that the temperature is higher than that.

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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)
  • Signal Processing (AREA)
  • Thermal Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
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Abstract

L'invention concerne une unité intérieure comprenant : une enveloppe comportant une entrée et une sortie ; un circuit de fluide frigorigène disposé dans l'enveloppe et reliant, au moyen d'une tuyauterie, un premier échangeur de chaleur, un second échangeur de chaleur et un dispositif de variation de capacité d'échange de fluide frigorigène destiné à établir une différence entre les températures du fluide frigorigène dans le premier échangeur de chaleur et dans le second échangeur de chaleur ; et un ventilateur disposé dans l'enveloppe et destiné à souffler de l'air vers le premier échangeur de chaleur et vers le second échangeur de chaleur. La sortie comporte une première sortie servant à souffler l'air ayant traversé le ventilateur et le premier échangeur de chaleur, et une seconde sortie servant à souffler l'air ayant traversé le ventilateur et le second échangeur de chaleur. Le dispositif de variation de capacité d'échange de fluide frigorigène comporte un dispositif de commutation servant à commuter l'écoulement de fluide frigorigène dans au moins le circuit de fluide frigorigène. Une mise en œuvre de soufflage à deux températures est effectuée pour souffler de l'air à partir de la première sortie et de la seconde sortie qui sont à des températures différentes, par établissement, au moyen du dispositif de variation de capacité d'échange de fluide frigorigène, d'une différence entre les températures du fluide frigorigène et/ou les débits du fluide frigorigène dans le premier échangeur de chaleur et dans le second échangeur de chaleur.
PCT/JP2016/079048 2016-09-30 2016-09-30 Unité intérieure et climatiseur WO2018061188A1 (fr)

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EP16917738.3A EP3521716A4 (fr) 2016-09-30 2016-09-30 Unité intérieure et climatiseur
CN201680089124.9A CN109790992B (zh) 2016-09-30 2016-09-30 室内机及空气调节机
JP2018541839A JP6751150B2 (ja) 2016-09-30 2016-09-30 室内機及び空気調和機
PCT/JP2016/079048 WO2018061188A1 (fr) 2016-09-30 2016-09-30 Unité intérieure et climatiseur

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JP6751150B2 (ja) 2020-09-02
CN109790992B (zh) 2023-06-30
EP3521716A4 (fr) 2019-10-16
JPWO2018061188A1 (ja) 2019-07-11
EP3521716A1 (fr) 2019-08-07

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