WO2011099323A1 - Reversible receiver, and air conditioner - Google Patents

Reversible receiver, and air conditioner Download PDF

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Publication number
WO2011099323A1
WO2011099323A1 PCT/JP2011/050636 JP2011050636W WO2011099323A1 WO 2011099323 A1 WO2011099323 A1 WO 2011099323A1 JP 2011050636 W JP2011050636 W JP 2011050636W WO 2011099323 A1 WO2011099323 A1 WO 2011099323A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
pipe
container
air conditioner
heat exchanger
Prior art date
Application number
PCT/JP2011/050636
Other languages
French (fr)
Japanese (ja)
Inventor
神原　裕志
佐藤　誠
丈幸 是澤
Original Assignee
三菱重工業株式会社
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Publication date
Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to EP11742072.9A priority Critical patent/EP2535668A4/en
Publication of WO2011099323A1 publication Critical patent/WO2011099323A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/16—Receivers
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/02—Increasing the heating capacity of a reversible cycle during cold outdoor conditions

Definitions

  • the present invention relates to a reversible direction receiver and an air conditioner suitable for application to an air conditioner that is operated in a heat pump refrigeration cycle in which the direction of refrigerant flow is switched.
  • an air conditioner that employs a heat pump refrigeration cycle that switches between a cooling operation and a heating operation by switching the direction in which the refrigerant flows
  • a reversible direction receiver which is a component that temporarily stores (holds) excess refrigerant, so that the amount of refrigerant circulating through the air conditioner is optimized. It is adjusted (for example, refer patent document 1).
  • a refrigerant that is temporarily stored during the cooling operation is temporarily stored (held) in the receiver, and a refrigerant that is excessive during the heating operation.
  • the number of indoor units in the multi-type air conditioner decreases, there is a problem that the refrigerant pressure in the indoor unit during heating operation becomes excessively high. That is, when the number of indoor units decreases, the number of indoor heat exchangers that can be used for holding the refrigerant during the heating operation also decreases. As a result, the ability to adjust the amount of refrigerant circulating during heating operation may be reduced. In other words, since the amount of refrigerant that can be held during the heating operation is reduced, there is a risk that the refrigerant pressure in the portion where the refrigerant becomes high during the heating operation, for example, the refrigerant pressure in the indoor heat exchanger during the heating operation, becomes excessively high.
  • the present invention has been made to solve the above problems, and in a multi-type air conditioner, even if the number of indoor units is reduced, an excessive increase in the refrigerant pressure during heating operation can be suppressed. It aims at providing a reversible direction receiver and an air conditioner.
  • a reversible direction receiver is a reversible direction receiver used in a heat pump type air conditioner in which a refrigerant flow direction can be reversibly switched, and a container that stores the refrigerant therein,
  • One pipe extending from the bottom to the top of the container and having an opening at the upper end, and the air conditioner allows the refrigerant to flow into the container during cooling operation, and causes the refrigerant to flow out from the container during heating operation;
  • the other pipe extending from the bottom to the top of the container and having an opening at the upper end thereof, the air conditioner causes the refrigerant to flow out of the container during cooling operation, and allows the refrigerant to flow into the container during heating operation;
  • the one pipe extends above the other pipe, and the side surface of the region disposed in the container in the one pipe has the above-mentioned Communicating hole is provided for connecting the interior of the pipe and the container of square, the other pipe is connected
  • the reversible direction receiver can temporarily store (hold) the liquid refrigerant during the heating operation or the cooling operation of the air conditioner in which the refrigerant flow direction is switched. That is, during the heating operation, the refrigerant in which the gas refrigerant and the liquid refrigerant decompressed by the throttle mechanism are mixed flows into the reversible direction receiver through the other pipe. The gaseous refrigerant flows into the pipe from the opening formed at the upper end of one pipe and flows out from the reversible receiver. Most of the liquid refrigerant is held inside the container.
  • a part of the liquid refrigerant flows into the pipe together with a lubricant (for example, lubricating oil) contained in the liquid refrigerant from a communication hole formed on the side surface of one pipe and flows out from the reversible receiver. Therefore, the liquid refrigerant can be held in the reversible direction receiver even during the heating operation of the air conditioner.
  • a lubricant for example, lubricating oil
  • the flow direction of the refrigerant is reversed from that during the heating operation, and the liquid refrigerant condensed by the heat exchanger flows into the reversible direction receiver through one pipe.
  • the liquid refrigerant flows into the throttle mechanism through the other pipe.
  • excess liquid refrigerant is accumulated in the reversible receiver. Therefore, the reversible direction receiver can temporarily store the liquid refrigerant during the cooling operation.
  • the opening and the communication hole in the other pipe are arranged in the vicinity of the lower end of the container, and the opening in the one pipe is arranged in the vicinity of the upper end of the container.
  • the amount of liquid refrigerant that can be held by the reversible direction receiver can be increased, and the lubricant contained in the liquid refrigerant can easily flow out of the reversible direction receiver to the outside. . That is, by arranging the opening in one pipe in the vicinity of the upper end of the container, the liquid refrigerant begins to rise to the opening, and the liquid refrigerant flows out of the reversible receiver through the one pipe. In other words, the amount of liquid refrigerant held inside the container is increased. Furthermore, by arranging the communication hole in the vicinity of the lower end of the container, the lubricant that easily accumulates in the lower part of the container can easily flow into one of the pipes through the communication hole.
  • the opening of the other pipe for supplying the refrigerant to the throttle mechanism in the vicinity of the lower end of the container, the opening can be arranged inside the accumulated liquid refrigerant, and it becomes easy to supply the liquid refrigerant to the throttle mechanism. .
  • An air conditioner includes an outdoor unit having an outdoor heat exchanger, an indoor unit having an indoor heat exchanger, and the reversible direction receiver of the present invention, wherein the one pipe is The outdoor heat exchanger and the refrigerant are connected so as to be able to flow, and the other pipe is connected via the throttle mechanism so that the indoor heat exchanger and the refrigerant can flow.
  • a liquid refrigerant can be hold
  • the minimum number of indoor units connected to the outdoor unit can be reduced. In other words, installation variations in the multi-type air conditioner can be increased.
  • one pipe is extended to the upper side of the other pipe, a communication hole is provided on the side surface of the one pipe, and the other pipe is used as a throttle mechanism in the air conditioner.
  • FIGS. 1 and 2 are mimetic diagram explaining composition of an air harmony machine concerning this embodiment.
  • the air conditioner 1 of this embodiment is what is called a multi-type air conditioner provided with four indoor units 4A, 4B, 4C, and 4D with respect to one outdoor unit 2, as shown in FIG. .
  • the number of indoor units may be plural, and may be more or less than the above four, and is not particularly limited.
  • the outdoor unit 2 is mainly provided with a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, and expansion valves (throttle mechanisms) 24A, 24B, 24C, and 24D. ing.
  • Liquid side operation valves 25A, 25B, 25C, 25D and gas side operation valves 26A, 26B, 26C, 26D are provided between the outdoor unit 2 and the indoor units 4A, 4B, 4C, 4D. .
  • the compressor 21 circulates the refrigerant between the one outdoor unit 2 and the four indoor units 4A, 4B, 4C, 4D, sucks and compresses the low-temperature and low-pressure refrigerant, and the high-temperature and high-pressure refrigerant. It is what.
  • An accumulator 27 and a separate accumulator 28 are connected to the suction port of the compressor 21 so that the refrigerant can flow, and a muffler 29 is connected to the discharge port so that the refrigerant can flow.
  • the compressor 21 may be a known compressor such as a scroll compressor, and is not particularly limited.
  • the accumulator 27 and the separate accumulator 28 supply the gas refrigerant to the compressor 21 and temporarily store the liquid refrigerant so that the refrigerant is between one outdoor unit 2 and the four indoor units 4A, 4B, 4C, 4D.
  • the flow rate is adjusted.
  • the accumulator 27 is disposed between the compressor 21 and the separate accumulator 28 and is connected to the suction port of the compressor 21 so as to be able to supply a gaseous refrigerant.
  • the separate accumulator 28 is disposed between the accumulator 27 and the four-way valve 22, and is connected to the accumulator 27 so that a gaseous refrigerant can be supplied.
  • a suction pipe sensor 31 that measures the temperature of the refrigerant sucked into the compressor 21 is disposed in a pipe connecting the accumulator 27 and the separate accumulator 28.
  • the muffler 29 relaxes the pressure fluctuation of the refrigerant discharged from the compressor 21 and suppresses the generation of vibration and noise due to the pressure fluctuation.
  • the muffler 29 is disposed between the compressor 21 and the four-way valve 22 and is connected to the discharge port of the compressor 21 so that the refrigerant can flow.
  • a discharge pipe sensor 32 that measures the temperature of the refrigerant discharged from the compressor 21 is disposed on the pipe connecting the muffler 29 and the compressor 21.
  • the four-way valve 22 controls the outflow destination of the refrigerant discharged from the compressor 21 according to the operating state of the air conditioner 1. Specifically, during the cooling operation, the refrigerant discharged from the compressor 21 is guided to the outdoor heat exchanger 23, and the refrigerant flowing out from the indoor heat exchanger 41 is guided to the compressor 21. During the heating operation, the refrigerant discharged from the compressor 21 is guided to the indoor heat exchanger 41, and the refrigerant flowing out of the outdoor heat exchanger 23 is guided to the compressor 21.
  • the four-way valve 22 is connected so that the refrigerant can flow out toward the separate accumulator 28 and the refrigerant can flow in from the muffler 29. Furthermore, the refrigerant is connected to the outdoor heat exchanger 23 and the indoor heat exchangers 41 of the indoor units 4A, 4B, 4C, and 4D so that the refrigerant can flow in or out.
  • a known valve can be used as the four-way valve 22 and is not particularly limited.
  • the outdoor heat exchanger 23 performs heat exchange between the outdoor air and the refrigerant. Specifically, during the cooling operation, the heat of the refrigerant is dissipated to the outdoor air, and during the heating operation, the heat of the outdoor air is absorbed by the refrigerant.
  • the outdoor heat exchanger 23 is disposed between the four-way valve 22 and a receiver (reversible direction receiver) 50, and is connected so as to allow the refrigerant to flow therethrough.
  • an outdoor heat exchanger sensor 34 that measures the temperature of the outdoor heat exchanger 23 and an outdoor air temperature sensor 35 that measures the temperature of outdoor air are arranged.
  • FIG. 2 is a front view illustrating the configuration of the receiver of FIG.
  • the receiver 50 is disposed between the outdoor heat exchanger 23 and the expansion valves 24A, 24B, 24C, and 24D, and is connected so as to allow the refrigerant to flow therethrough.
  • the receiver 50 supplies liquid refrigerant to the expansion valves 24A, 24B, 24C, and 24D during the cooling operation, and stores (holds) excess liquid refrigerant during the heating operation.
  • the receiver 50 is provided with a container 51, a first pipe (one pipe) 52A, and a second pipe (the other pipe) 52B.
  • the container 51 stores liquid refrigerant or gas refrigerant therein, and in this embodiment, the container 51 will be described by applying to an example in which the container 51 is formed in a cylindrical shape with both ends closed.
  • the first pipe 52 ⁇ / b> A is a pipe that connects the container 51 and the outdoor heat exchanger 23 so that the refrigerant can flow therethrough.
  • the first pipe 52 ⁇ / b> A is inserted into the container 51 from the lower end of the container 51.
  • the first pipe 52 ⁇ / b> A extends inside the container 51 toward the upper end of the container 51, and the opening 53 ⁇ / b> A connected to the inside of the container 51 in the first pipe 52 ⁇ / b> A is arranged near the upper end of the container 51.
  • a communication hole 54 that connects the inside of the first pipe 52A and the inside of the container 51 is provided on the side surface of the first pipe 52A.
  • the communication hole 54 is a hole through which the lubricating oil (lubricant) of the compressor 21 stored in the container 51 flows into the first pipe 52A.
  • the communication hole 54 is formed below the region of the first pipe 52 ⁇ / b> A disposed inside the container 51, in other words, near the lower end of the container 51.
  • the communication hole 54 is formed in the vicinity of the opening 53B of the second pipe 52B.
  • the diameter of the communication hole 54 is determined based on a target value of the amount of liquid refrigerant held in the container 51 during the heating operation. That is, it is determined based on the flow rate of the liquid refrigerant flowing into the container 51 during the heating operation and the flow rate of the liquid refrigerant flowing into the communication hole 54.
  • the second pipe 52B is a pipe that connects the refrigerant between the container 51 and the expansion valves 24A, 24B, 24C, and 24D.
  • the pipe connects the container 51 and the indoor heat exchanger 41 so that the refrigerant can flow therethrough.
  • the second pipe 52 ⁇ / b> B is inserted into the container 51 from the lower end of the container 51.
  • An opening 53 ⁇ / b> B connected to the inside of the container 51 in the second pipe 52 ⁇ / b> B is disposed in the vicinity of the lower end of the container 51.
  • the expansion valves 24A, 24B, 24C and 24D are for adiabatically expanding the refrigerant passing therethrough, and for reducing the temperature and pressure of the refrigerant.
  • the expansion valves 24A, 24B, 24C, and 24D are arranged corresponding to the indoor units 4A, 4B, 4C, and 4D, in other words, are connected so that the refrigerant can flow therethrough.
  • the expansion valves 24A, 24B, 24C, and 24D are respectively arranged in four pipes that branch from one pipe extending from the receiver 50 in correspondence with the indoor units 4A, 4B, 4C, and 4D. .
  • the liquid side operation valves 25A, 25B, 25C, and 25D are portions connected to pipes extending from the indoor units 4A, 4B, 4C, and 4D, and are arranged corresponding to the indoor units 4A, 4B, 4C, and 4D, respectively. It is an operated valve.
  • the liquid side operation valves 25A, 25B, 25C, and 25D are disposed corresponding to the expansion valves 24A, 24B, 24C, and 24D, and a sound deadening capillary 36 and a strainer 37 are disposed therebetween.
  • the gas side operation valves 26A, 26B, 26C, and 26D are portions connected to pipes extending from the indoor units 4A, 4B, 4C, and 4D, and are arranged corresponding to the indoor units 4A, 4B, 4C, and 4D, respectively. It is an operated valve.
  • the gas side operation valves 26A, 26B, 26C, and 26D are connected to the four-way valve 22 through the manifold 38 so that the refrigerant can flow therethrough.
  • the indoor units 4A, 4B, 4C, and 4D are mainly provided with an indoor heat exchanger 41, a suction sensor 42, a central heat exchange sensor 43, and a cooling outlet heat exchange sensor 44. It has been.
  • the indoor heat exchanger 41 is disposed in each of the indoor units 4A, 4B, 4C, and 4D, and performs heat exchange between the indoor air and the refrigerant. Specifically, the heat of the room air is absorbed by the refrigerant during the cooling operation, and the heat of the refrigerant is radiated to the room air during the heating operation.
  • the indoor heat exchanger 41 of the indoor units 4A, 4B, 4C, and 4D allows refrigerant to flow through the liquid side operation valves 25A, 25B, 25C, and 25D and the gas side operation valves 26A, 26B, 26C, and 26D, respectively. It is connected.
  • the indoor heat exchanger 41 includes a suction sensor 42 that measures the temperature of indoor air sucked into the indoor units 4A, 4B, 4C, and 4D, and a central heat exchange sensor that measures the temperature of the central portion of the indoor heat exchanger 41. 43 and a cooling outlet heat exchange sensor 44 that measures the end temperature of the indoor heat exchanger 41 that serves as a refrigerant outlet during cooling.
  • the four-way valve 22 When the cooling operation is performed, as shown in FIG. 1, the four-way valve 22 is switched, the discharge port of the compressor 21 and the outdoor heat exchanger 23 are connected, and the suction port of the compressor 21 and the indoor heat exchange are connected.
  • the device 41 is connected.
  • the high-temperature and high-pressure refrigerant discharged from the compressor 21 flows into the outdoor heat exchanger 23 through the muffler 29 and the four-way valve 22.
  • the refrigerant releases heat to the outdoor air and condenses to become a liquid refrigerant.
  • the high-pressure liquid refrigerant is led from the outdoor heat exchanger 23 to the expansion valves 24A, 24B, 24C, and 24D via the receiver 50.
  • the high-pressure liquid refrigerant undergoes adiabatic expansion when passing through the expansion valves 24A, 24B, 24C, and 24D, and becomes a low-temperature and low-pressure refrigerant.
  • the low-temperature and low-pressure refrigerant flows into the indoor heat exchanger 41 of the indoor units 4A, 4B, 4C, and 4D through the silencer capillary 36, the strainer 37, and the liquid side operation valves 25A, 25B, 25C, and 25D.
  • the refrigerant absorbs heat from indoor air in the indoor heat exchanger 41 and evaporates to become a gaseous refrigerant. On the other hand, the indoor air is deprived of heat and cooled.
  • the gaseous refrigerant is sucked into the suction port of the compressor 21 through the gas side operation valves 26A, 26B, 26C, and 26D, the manifold 38, the four-way valve 22, the separate accumulator 28, and the accumulator 27.
  • the sucked refrigerant is compressed by the compressor 21 and discharged from the discharge port as a high-temperature and high-pressure refrigerant. Thereafter, the cooling operation is continued by repeating the above-described process.
  • the four-way valve 22 When the heating operation is performed, as shown in FIG. 1, the four-way valve 22 is switched, the discharge port of the compressor 21 and the indoor heat exchanger 41 are connected, and the suction port of the compressor 21 and the outdoor heat exchange are connected.
  • the device 23 is connected.
  • the high-temperature and high-pressure refrigerant discharged from the compressor 21 flows into the indoor heat exchanger 41 through the muffler 29 and the four-way valve 22.
  • the indoor heat exchanger 41 the refrigerant releases heat to the indoor air and condenses to become a liquid refrigerant.
  • indoor air absorbs heat and is heated.
  • the high-pressure liquid refrigerant is guided from the indoor heat exchanger 41 to the expansion valves 24A, 24B, 24C, and 24D via the liquid side operation valves 25A, 25B, 25C, and 25D, the strainer 37, and the sound-eliminating capillary 36.
  • the high-pressure liquid refrigerant undergoes adiabatic expansion when passing through the expansion valves 24A, 24B, 24C, and 24D, and becomes a low-temperature and low-pressure refrigerant.
  • the low-temperature and low-pressure refrigerant flows into the outdoor heat exchanger 23 via the receiver 50.
  • the refrigerant absorbs heat from the outdoor air in the outdoor heat exchanger 23 and evaporates to become a gaseous refrigerant.
  • the gaseous refrigerant is sucked into the suction port of the compressor 21 through the four-way valve 22, the separate accumulator 28 and the accumulator 27.
  • the sucked refrigerant is compressed by the compressor 21 and discharged from the discharge port as a high-temperature and high-pressure refrigerant. Thereafter, the cooling operation is continued by repeating the above-described process.
  • the refrigerant flow and storage in the receiver 50 which is a feature of the present embodiment, will be described.
  • the storage of the liquid refrigerant in the receiver 50 during the heating operation in other words, the holding of the liquid refrigerant by the receiver 50 will be described.
  • the refrigerant in which the gas refrigerant and the liquid refrigerant decompressed by the expansion valves 24A, 24B, 24C, 24D are mixed flows into the receiver 50 through the second pipe 52B.
  • the gaseous refrigerant flows into the pipe from the opening 53A formed at the upper end of the first pipe 52A and flows out from the receiver 50. Therefore, most of the liquid refrigerant is held inside the container.
  • a part of the liquid refrigerant flows into the pipe together with the lubricating oil contained in the liquid refrigerant from the communication hole 54 formed on the side surface of the first pipe 52 ⁇ / b> A and flows out from the receiver 50.
  • the flow rate of the liquid refrigerant flowing into the container 51 from the second pipe 52B is small. Also, the liquid refrigerant is held in the receiver 50.
  • the opening 53A in the first pipe 52A is arranged in the vicinity of the upper end of the container 51, so that the liquid refrigerant begins to rise up to the opening 53A, and the liquid refrigerant goes out of the receiver 50 through the first pipe 52A. leak. In other words, the amount of liquid refrigerant held in the container 51 is increased. Furthermore, by arranging the communication hole 54 in the vicinity of the lower end of the container 51, the lubricating oil that tends to accumulate below the container 51 easily flows into one pipe through the communication hole 54.
  • the flow direction of the refrigerant is reversed from that during the heating operation, and the liquid refrigerant condensed by the outdoor heat exchanger 23 flows into the receiver 50 through the first pipe 52A.
  • the liquid refrigerant flows into the expansion valves 24A, 24B, 24C, and 24D through the second pipe 52B.
  • the excess liquid refrigerant Accumulates in the receiver 50. Therefore, the liquid refrigerant is temporarily stored in the receiver 50 during the cooling operation.
  • the liquid refrigerant accumulates downward, and the gas refrigerant easily accumulates upward.
  • the opening 53B of the second pipe 52B for supplying the refrigerant to the expansion valves 24A, 24B, 24C, 24D in the vicinity of the lower end of the container 51, the opening 53B can be arranged inside the accumulated liquid refrigerant, It becomes easy to supply the liquid refrigerant to the expansion valves 24A, 24B, 24C, and 24D.
  • the liquid refrigerant can be held in the receiver 50 even during heating operation, and the number of indoor units 4A, 4B, 4C, 4D connected to the outdoor unit 2 can be reduced.
  • the minimum number of indoor units 4A, 4B, 4C, 4D in the air conditioner 1 can be reduced, the number of installation variations in the air conditioner 1 can be increased, and air that meets market needs in a wider range.
  • the harmony machine 1 can be provided.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

Provided are a reversible receiver and an air conditioner wherein it is possible to suppress the refrigerant pressure in a multi-type air conditioner from rising excessively during a heating operation even when the number of indoor units are reduced. Specifically, disclosed is an air conditioner provided with: a container (51) for storing a refrigerant; a pipe (52A) which extends from the bottom side to the upper side of the container (51), has an opening (53A) on the upper edge, is used to introduce the refrigerant to the container (51) when the air conditioner is in a cooling operation, and is used to remove the refrigerant from the container (51) when the air conditioner is in a heating operation; and another pipe (52B) which extends from the bottom side to the upper side of the container (51), has an opening (53B) on the upper edge, is used to remove the refrigerant from the container (51) when the air conditioner is in a cooling operation, and is used to introduce the refrigerant to the container (51) when the air conditioner is in a heating operation. Pipe (52A) extends further upward than pipe (52B). A communication hole (54) for connecting pipe (52A) and the inside of the container (51) is provided on the side surface of pipe (52A) and on a region positioned within the container (51).

Description

可逆方向レシーバおよび空気調和機Reversible direction receiver and air conditioner
　本発明は、冷媒の流れる方向が切り替えられるヒートポンプ式冷凍サイクルで運転される空気調和機に適用して好適な可逆方向レシーバおよび空気調和機に関する。 The present invention relates to a reversible direction receiver and an air conditioner suitable for application to an air conditioner that is operated in a heat pump refrigeration cycle in which the direction of refrigerant flow is switched.
　一般に、冷媒が流れる方向を切り替えることにより冷房運転と暖房運転とを切り替えるヒートポンプ式冷凍サイクルを採用する空気調和機にあっては、最適冷媒量が変化することが知られている。そのため、このような空気調和機には、余剰になる冷媒を一時的に貯留する（ホールドする）構成要素である可逆方向レシーバが設けられ、空気調和機を循環する冷媒量が最適になるように調節されている（例えば、特許文献１参照。）。 Generally, in an air conditioner that employs a heat pump refrigeration cycle that switches between a cooling operation and a heating operation by switching the direction in which the refrigerant flows, it is known that the optimum amount of refrigerant changes. Therefore, such an air conditioner is provided with a reversible direction receiver, which is a component that temporarily stores (holds) excess refrigerant, so that the amount of refrigerant circulating through the air conditioner is optimized. It is adjusted (for example, refer patent document 1).
　例えば、１台の室外機に対して複数台の室内機を備えるマルチ型空気調和機では、冷房運転時に余剰となる冷媒をレシーバに一時的に貯留（ホールド）し、暖房運転時に余剰となる冷媒を暖房運転が停止されている室内機に関する電子膨張弁を僅かに開けて（微開して）室内熱交換器にホールドすることにより、循環する冷媒量が最適になるように制御されている。 For example, in a multi-type air conditioner that includes a plurality of indoor units for one outdoor unit, a refrigerant that is temporarily stored during the cooling operation is temporarily stored (held) in the receiver, and a refrigerant that is excessive during the heating operation. Is controlled so that the amount of circulating refrigerant is optimized by slightly opening (slightly opening) the electronic expansion valve relating to the indoor unit in which the heating operation is stopped and holding it in the indoor heat exchanger.
特開平１０－１７０１０７号公報JP-A-10-170107
　しかしながら、マルチ型空気調和機における室内機の数が少なくなると、暖房運転中の室内機における冷媒圧力が過剰に高くなる問題があった。
　つまり、室内機の数が少なくなると、暖房運転時に冷媒のホールドに用いることができる室内熱交換器の数も少なくなる。すると、暖房運転時における循環する冷媒量の調節能力が低下するおそれがあった。言い換えると、暖房運転時にホールドできる冷媒量が減るため、暖房運転時に冷媒が高圧になる部分、例えば、暖房運転中の室内熱交換器における冷媒圧力が過剰に高くなるおそれがあった。 However, when the number of indoor units in the multi-type air conditioner decreases, there is a problem that the refrigerant pressure in the indoor unit during heating operation becomes excessively high.
That is, when the number of indoor units decreases, the number of indoor heat exchangers that can be used for holding the refrigerant during the heating operation also decreases. As a result, the ability to adjust the amount of refrigerant circulating during heating operation may be reduced. In other words, since the amount of refrigerant that can be held during the heating operation is reduced, there is a risk that the refrigerant pressure in the portion where the refrigerant becomes high during the heating operation, for example, the refrigerant pressure in the indoor heat exchanger during the heating operation, becomes excessively high.
　本発明は、上記の課題を解決するためになされたものであって、マルチ型空気調和機において、室内機の数を減らしても暖房運転時における冷媒圧力の過剰な上昇を抑制することができる可逆方向レシーバおよび空気調和機を提供することを目的とする。 The present invention has been made to solve the above problems, and in a multi-type air conditioner, even if the number of indoor units is reduced, an excessive increase in the refrigerant pressure during heating operation can be suppressed. It aims at providing a reversible direction receiver and an air conditioner.
　上記目的を達成するために、本発明は、以下の手段を提供する。
　本発明の一態様に係る可逆方向レシーバは、冷媒の流れ方向が可逆的に切替可能なヒートポンプ式の空気調和機に用いられる可逆方向レシーバであって、内部に前記冷媒を貯留する容器と、前記容器の下方から上方に向かって延びるとともに上端に開口を有し、前記空気調和機が冷房運転時に前記容器に前記冷媒を流入させ、暖房運転時に前記容器から前記冷媒を流出させる一方の配管と、前記容器の下方から上方に向かって延びるとともに上端に開口を有し、前記空気調和機が冷房運転時に前記容器から前記冷媒を流出させ、暖房運転時に前記容器に前記冷媒を流入させる他方の配管と、が設けられ、前記一方の配管は前記他方の配管よりも上方まで延びるとともに、前記一方の配管における前記容器内に配置された領域の側面には、前記一方の配管および前記容器の内部をつなぐ連通孔が設けられ、前記他方の配管は、前記空気調和機における前記冷媒の圧力を減圧させる絞り機構に接続されている。 In order to achieve the above object, the present invention provides the following means.
A reversible direction receiver according to an aspect of the present invention is a reversible direction receiver used in a heat pump type air conditioner in which a refrigerant flow direction can be reversibly switched, and a container that stores the refrigerant therein, One pipe extending from the bottom to the top of the container and having an opening at the upper end, and the air conditioner allows the refrigerant to flow into the container during cooling operation, and causes the refrigerant to flow out from the container during heating operation; The other pipe extending from the bottom to the top of the container and having an opening at the upper end thereof, the air conditioner causes the refrigerant to flow out of the container during cooling operation, and allows the refrigerant to flow into the container during heating operation; The one pipe extends above the other pipe, and the side surface of the region disposed in the container in the one pipe has the above-mentioned Communicating hole is provided for connecting the interior of the pipe and the container of square, the other pipe is connected to the pressure of the refrigerant in the air conditioner to the throttle mechanism for decompressing.
　上記態様によれば、可逆方向レシーバは、冷媒の流れ方向が切り替わる空気調和機の暖房運転時や冷房運転時にも液体冷媒を一時的に貯留（ホールド）することができる。
　つまり、暖房運転時には、絞り機構により減圧された気体冷媒および液体冷媒が混合した冷媒が、他方の配管を通じて可逆方向レシーバに流入する。気体冷媒は一方の配管上端に形成された開口から配管内に流入して可逆方向レシーバから流出する。液体冷媒の大半は容器の内部にホールドされる。一部の液体冷媒は、一方の配管の側面に形成された連通孔から、液体冷媒に含まれる潤滑剤（例えば潤滑油）とともに配管内に流入して可逆方向レシーバから流出する。そのため、空気調和機の暖房運転時であっても、液体冷媒を可逆方向レシーバにホールドすることができる。 According to the above aspect, the reversible direction receiver can temporarily store (hold) the liquid refrigerant during the heating operation or the cooling operation of the air conditioner in which the refrigerant flow direction is switched.
That is, during the heating operation, the refrigerant in which the gas refrigerant and the liquid refrigerant decompressed by the throttle mechanism are mixed flows into the reversible direction receiver through the other pipe. The gaseous refrigerant flows into the pipe from the opening formed at the upper end of one pipe and flows out from the reversible receiver. Most of the liquid refrigerant is held inside the container. A part of the liquid refrigerant flows into the pipe together with a lubricant (for example, lubricating oil) contained in the liquid refrigerant from a communication hole formed on the side surface of one pipe and flows out from the reversible receiver. Therefore, the liquid refrigerant can be held in the reversible direction receiver even during the heating operation of the air conditioner.
　その一方で、冷房運転時には、暖房運転時とは冷媒の流れ方向が逆になり、熱交換器により凝縮された液体冷媒が、一方の配管を通じて可逆方向レシーバに流入する。液体冷媒は、他方の配管を通じて絞り機構に流入するが、絞り機構を通過する液体冷媒の流量は制限されているため、余剰な液体冷媒は可逆方向レシーバに溜まる。そのため、可逆方向レシーバは、冷房運転時に液体冷媒を一時的に貯留することができる。
　先行技術文献に記載された可逆方向レシーバと比較して、容器の内部に一方の配管が配置された領域と他方の配管が配置された領域とを区画する仕切り板が設けられていないため、冷媒が可逆方向レシーバを通過する際の流れ抵抗が小さくなる。 On the other hand, during the cooling operation, the flow direction of the refrigerant is reversed from that during the heating operation, and the liquid refrigerant condensed by the heat exchanger flows into the reversible direction receiver through one pipe. The liquid refrigerant flows into the throttle mechanism through the other pipe. However, since the flow rate of the liquid refrigerant passing through the throttle mechanism is limited, excess liquid refrigerant is accumulated in the reversible receiver. Therefore, the reversible direction receiver can temporarily store the liquid refrigerant during the cooling operation.
Compared to the reversible direction receiver described in the prior art document, there is no partition plate that divides the region in which one pipe is arranged and the region in which the other pipe is arranged inside the container. Reduces the flow resistance when passing through the reversible receiver.
　上記態様においては、前記他方の配管における前記開口および前記連通孔は、前記容器の下端近傍に配置され、前記一方の配管における前記開口は、前記容器の上端近傍に配置されてことが望ましい。 In the above aspect, it is preferable that the opening and the communication hole in the other pipe are arranged in the vicinity of the lower end of the container, and the opening in the one pipe is arranged in the vicinity of the upper end of the container.
　上記態様によれば、空気調和機の暖房運転時には、可逆方向レシーバがホールドできる液体冷媒の量を増やすことができ、かつ、液体冷媒に含まれる潤滑剤を可逆方向レシーバから外部に流出させやすくなる。
　つまり、一方の配管における開口を、容器の上端近傍に配置することにより、液体冷媒の液面が当該開口まで上昇して始めて、液体冷媒が一方の配管を通じて可逆方向レシーバの外へ流出する。言い換えると、容器の内部にホールドされる液体冷媒の量が増やされる。さらに、連通孔を容器の下端近傍に配置することにより、容器の下方に溜まりやすい潤滑剤は、容易に連通孔を介して一方の配管の内部に流入することができる。 According to the above aspect, during the heating operation of the air conditioner, the amount of liquid refrigerant that can be held by the reversible direction receiver can be increased, and the lubricant contained in the liquid refrigerant can easily flow out of the reversible direction receiver to the outside. .
That is, by arranging the opening in one pipe in the vicinity of the upper end of the container, the liquid refrigerant begins to rise to the opening, and the liquid refrigerant flows out of the reversible receiver through the one pipe. In other words, the amount of liquid refrigerant held inside the container is increased. Furthermore, by arranging the communication hole in the vicinity of the lower end of the container, the lubricant that easily accumulates in the lower part of the container can easily flow into one of the pipes through the communication hole.
　その一方で、空気調和機の冷房運転時には、絞り機構へ液体冷媒を供給しやすくなる。
　つまり、容器の内部では液体冷媒は下方に溜まり、気体冷媒は上方に溜まりやすい。絞り機構へ冷媒を供給する他方の配管の開口を、容器の下端近傍に配置することにより、当該開口を溜まった液体冷媒の内部に配置させることができ、絞り機構へ液体冷媒を供給しやすくなる。 On the other hand, during the cooling operation of the air conditioner, it becomes easy to supply the liquid refrigerant to the throttle mechanism.
That is, in the container, the liquid refrigerant collects downward and the gas refrigerant easily collects upward. By arranging the opening of the other pipe for supplying the refrigerant to the throttle mechanism in the vicinity of the lower end of the container, the opening can be arranged inside the accumulated liquid refrigerant, and it becomes easy to supply the liquid refrigerant to the throttle mechanism. .
　本発明の一態様に係る空気調和機は、室外熱交換器を有する室外機と、室内熱交換器を有する室内機と、上記本発明の可逆方向レシーバと、が設けられ、前記一方の配管は、前記室外熱交換器と前記冷媒が流通可能に接続され、前記他方の配管は、前記絞り機構を介して前記室内熱交換器と前記冷媒が流通可能に接続されている。 An air conditioner according to an aspect of the present invention includes an outdoor unit having an outdoor heat exchanger, an indoor unit having an indoor heat exchanger, and the reversible direction receiver of the present invention, wherein the one pipe is The outdoor heat exchanger and the refrigerant are connected so as to be able to flow, and the other pipe is connected via the throttle mechanism so that the indoor heat exchanger and the refrigerant can flow.
　上記態様によれば、空気調和機が暖房運転されても、液体冷媒を可逆方向レシーバにホールドすることができる。
　例えば、１台の室外機に複数台の室内機が接続されるマルチ型空気調和機では、室外機に接続される室内機の最小台数を減らすことができる。言い換えると、マルチ型空気調和機における据え付けバリエーションを増やすことができる。 According to the said aspect, even if an air conditioner is heating-operated, a liquid refrigerant can be hold | maintained at a reversible direction receiver.
For example, in a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit, the minimum number of indoor units connected to the outdoor unit can be reduced. In other words, installation variations in the multi-type air conditioner can be increased.
　本発明の可逆方向レシーバおよび空気調和機によれば、一方の配管を他方の配管よりも上方まで延ばすとともに、一方の配管の側面に連通孔を設け、他方の配管を空気調和機における絞り機構に接続することにより、マルチ型空気調和機において、室内機の数を減らしても暖房運転時における冷媒圧力の過剰な上昇を抑制することができるという効果を奏する。 According to the reversible direction receiver and the air conditioner of the present invention, one pipe is extended to the upper side of the other pipe, a communication hole is provided on the side surface of the one pipe, and the other pipe is used as a throttle mechanism in the air conditioner. By connecting, in a multi-type air conditioner, even if it reduces the number of indoor units, there exists an effect that the excessive raise of the refrigerant pressure at the time of heating operation can be suppressed.
本発明の一実施形態に係る空気調和機の構成を説明する模式図である。It is a mimetic diagram explaining composition of an air harmony machine concerning one embodiment of the present invention. 図１のレシーバの構成を説明する正面図である。It is a front view explaining the structure of the receiver of FIG.
　この発明の一実施形態に係る空気調和機について、図１および図２を参照して説明する。
　図１は、本実施形態に係る空気調和機の構成を説明する模式図である。
　本実施形態の空気調和機１は、図１に示すように、１台の室外機２に対して４台の室内機４Ａ，４Ｂ，４Ｃ，４Ｄと、備える、いわゆるマルチ型空気調和機である。室内機の台数は複数であればよく、上述の４台よりも多くても少なくてもよく、特に限定するものではない。 An air conditioner according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
Drawing 1 is a mimetic diagram explaining composition of an air harmony machine concerning this embodiment.
The air conditioner 1 of this embodiment is what is called a multi-type air conditioner provided with four indoor units 4A, 4B, 4C, and 4D with respect to one outdoor unit 2, as shown in FIG. . The number of indoor units may be plural, and may be more or less than the above four, and is not particularly limited.
　室外機２には、図１に示すように、圧縮機２１と、四方弁２２と、室外熱交換器２３と、膨張弁（絞り機構）２４Ａ，２４Ｂ，２４Ｃ，２４Ｄと、が主に設けられている。
　室外機２と室内機４Ａ，４Ｂ，４Ｃ，４Ｄとの間には、液側操作弁２５Ａ，２５Ｂ，２５Ｃ，２５Ｄと、ガス側操作弁２６Ａ，２６Ｂ，２６Ｃ，２６Ｄと、が設けられている。 As shown in FIG. 1, the outdoor unit 2 is mainly provided with a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, and expansion valves (throttle mechanisms) 24A, 24B, 24C, and 24D. ing.
Liquid side operation valves 25A, 25B, 25C, 25D and gas side operation valves 26A, 26B, 26C, 26D are provided between the outdoor unit 2 and the indoor units 4A, 4B, 4C, 4D. .
　圧縮機２１は、１台の室外機２および４台の室内機４Ａ，４Ｂ，４Ｃ，４Ｄの間で冷媒を循環させるものであり、低温低圧の冷媒を吸入して圧縮し、高温高圧の冷媒とするものである。圧縮機２１の吸入口には、アキュムレータ２７および別置アキュムレータ２８が冷媒の流通が可能に接続され、吐出口にはマフラ２９が冷媒の流通が可能に接続されている。
　圧縮機２１としては、スクロール型圧縮機などの公知の圧縮機を用いることができ、特に限定するものではない。 The compressor 21 circulates the refrigerant between the one outdoor unit 2 and the four indoor units 4A, 4B, 4C, 4D, sucks and compresses the low-temperature and low-pressure refrigerant, and the high-temperature and high-pressure refrigerant. It is what. An accumulator 27 and a separate accumulator 28 are connected to the suction port of the compressor 21 so that the refrigerant can flow, and a muffler 29 is connected to the discharge port so that the refrigerant can flow.
The compressor 21 may be a known compressor such as a scroll compressor, and is not particularly limited.
　アキュムレータ２７および別置アキュムレータ２８は、圧縮機２１に気体冷媒を供給するとともに、液体冷媒を一時的に貯留して一つの室外機２および４つの室内機４Ａ，４Ｂ，４Ｃ，４Ｄの間で冷媒の流量を調節するものである。
　アキュムレータ２７は、圧縮機２１と別置アキュムレータ２８との間に配置され、圧縮機２１の吸入口に気体冷媒を供給可能に接続されている。別置アキュムレータ２８は、アキュムレータ２７と四方弁２２との間に配置され、アキュムレータ２７に気体冷媒を供給可能に接続されている。
　アキュムレータ２７と別置アキュムレータ２８とを接続する配管には、圧縮機２１に吸入される冷媒温度を測定する吸入管センサ３１が配置されている。 The accumulator 27 and the separate accumulator 28 supply the gas refrigerant to the compressor 21 and temporarily store the liquid refrigerant so that the refrigerant is between one outdoor unit 2 and the four indoor units 4A, 4B, 4C, 4D. The flow rate is adjusted.
The accumulator 27 is disposed between the compressor 21 and the separate accumulator 28 and is connected to the suction port of the compressor 21 so as to be able to supply a gaseous refrigerant. The separate accumulator 28 is disposed between the accumulator 27 and the four-way valve 22, and is connected to the accumulator 27 so that a gaseous refrigerant can be supplied.
A suction pipe sensor 31 that measures the temperature of the refrigerant sucked into the compressor 21 is disposed in a pipe connecting the accumulator 27 and the separate accumulator 28.
　マフラ２９は、圧縮機２１から吐出される冷媒の圧力変動を緩和するものであり、圧力変動に起因する振動や騒音の発生を抑制するものである。
　マフラ２９は、圧縮機２１と四方弁２２との間に配置され、圧縮機２１の吐出口と冷媒の流通が可能に接続されている。マフラ２９と圧縮機２１とを接続する配管には、圧縮機２１から吐出された冷媒の温度を測定する吐出管センサ３２が配置されている。 The muffler 29 relaxes the pressure fluctuation of the refrigerant discharged from the compressor 21 and suppresses the generation of vibration and noise due to the pressure fluctuation.
The muffler 29 is disposed between the compressor 21 and the four-way valve 22 and is connected to the discharge port of the compressor 21 so that the refrigerant can flow. A discharge pipe sensor 32 that measures the temperature of the refrigerant discharged from the compressor 21 is disposed on the pipe connecting the muffler 29 and the compressor 21.
　四方弁２２は、空気調和機１の運転状態に応じて、圧縮機２１から吐出された冷媒の流出先を制御するものである。
　具体的には、冷房運転時には、圧縮機２１から吐出された冷媒を室外熱交換器２３に導き、室内熱交換器４１から流出した冷媒を圧縮機２１に導くものである。暖房運転時には、圧縮機２１から吐出された冷媒を室内熱交換器４１に導き、室外熱交換器２３から流出した冷媒を圧縮機２１に導くものである。 The four-way valve 22 controls the outflow destination of the refrigerant discharged from the compressor 21 according to the operating state of the air conditioner 1.
Specifically, during the cooling operation, the refrigerant discharged from the compressor 21 is guided to the outdoor heat exchanger 23, and the refrigerant flowing out from the indoor heat exchanger 41 is guided to the compressor 21. During the heating operation, the refrigerant discharged from the compressor 21 is guided to the indoor heat exchanger 41, and the refrigerant flowing out of the outdoor heat exchanger 23 is guided to the compressor 21.
　四方弁２２は、別置アキュムレータ２８に向かって冷媒を流出可能に、かつ、マフラ２９から冷媒が流入可能に接続されている。さらに、室外熱交換器２３および室内機４Ａ，４Ｂ，４Ｃ，４Ｄの室内熱交換器４１に対して冷媒が流入または流出可能に接続されている。
　四方弁２２としては、公知の弁を用いることができ、特に限定するものではない。 The four-way valve 22 is connected so that the refrigerant can flow out toward the separate accumulator 28 and the refrigerant can flow in from the muffler 29. Furthermore, the refrigerant is connected to the outdoor heat exchanger 23 and the indoor heat exchangers 41 of the indoor units 4A, 4B, 4C, and 4D so that the refrigerant can flow in or out.
A known valve can be used as the four-way valve 22 and is not particularly limited.
　室外熱交換器２３は、室外の空気と冷媒との間で熱交換を行うものである。具体的には、冷房運転時には、冷媒の熱を室外の空気に放熱させるものであり、暖房運転時には、室外の空気の熱を冷媒に吸熱させるものである。室外熱交換器２３は、四方弁２２とレシーバ（可逆方向レシーバ）５０との間に配置され、両者と冷媒の流通が可能に接続されたものである。
　室外熱交換器２３には、室外熱交換器２３の温度を測定する室外熱交換器センサ３４と、室外空気の温度を測定する外気温度センサ３５と、が配置されている。 The outdoor heat exchanger 23 performs heat exchange between the outdoor air and the refrigerant. Specifically, during the cooling operation, the heat of the refrigerant is dissipated to the outdoor air, and during the heating operation, the heat of the outdoor air is absorbed by the refrigerant. The outdoor heat exchanger 23 is disposed between the four-way valve 22 and a receiver (reversible direction receiver) 50, and is connected so as to allow the refrigerant to flow therethrough.
In the outdoor heat exchanger 23, an outdoor heat exchanger sensor 34 that measures the temperature of the outdoor heat exchanger 23 and an outdoor air temperature sensor 35 that measures the temperature of outdoor air are arranged.
　図２は、図１のレシーバの構成を説明する正面図である。
　レシーバ５０は、室外熱交換器２３と膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄとの間に配置され、両者と冷媒の流通が可能に接続されたものである。レシーバ５０は、冷房運転時に液体冷媒を膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄに供給するものであり、暖房運転時に余剰な液体冷媒を貯留（ホールド）するものである。
　レシーバ５０には、図２に示すように、容器５１と、第１配管（一方の配管）５２Ａと、第２配管（他方の配管）５２Ｂと、が設けられている。 FIG. 2 is a front view illustrating the configuration of the receiver of FIG.
The receiver 50 is disposed between the outdoor heat exchanger 23 and the expansion valves 24A, 24B, 24C, and 24D, and is connected so as to allow the refrigerant to flow therethrough. The receiver 50 supplies liquid refrigerant to the expansion valves 24A, 24B, 24C, and 24D during the cooling operation, and stores (holds) excess liquid refrigerant during the heating operation.
As shown in FIG. 2, the receiver 50 is provided with a container 51, a first pipe (one pipe) 52A, and a second pipe (the other pipe) 52B.
　容器５１は、内部に液体冷媒や気体冷媒が貯留されるものであり、本実施形態では、容器５１が、両端が閉じられた円筒状に形成された例に適用して説明する。 The container 51 stores liquid refrigerant or gas refrigerant therein, and in this embodiment, the container 51 will be described by applying to an example in which the container 51 is formed in a cylindrical shape with both ends closed.
　第１配管５２Ａは、図１および図２に示すように、容器５１と室外熱交換器２３との間を冷媒が流通可能に接続する配管である。
　第１配管５２Ａは、図２に示すように、容器５１の下端から容器５１の内部に挿入されている。第１配管５２Ａは容器５１の内部を容器５１の上端に向かって延びて配置され、第１配管５２Ａにおける容器５１内とつながる開口５３Ａは、容器５１の上端近傍に配置されている。 As shown in FIGS. 1 and 2, the first pipe 52 </ b> A is a pipe that connects the container 51 and the outdoor heat exchanger 23 so that the refrigerant can flow therethrough.
As shown in FIG. 2, the first pipe 52 </ b> A is inserted into the container 51 from the lower end of the container 51. The first pipe 52 </ b> A extends inside the container 51 toward the upper end of the container 51, and the opening 53 </ b> A connected to the inside of the container 51 in the first pipe 52 </ b> A is arranged near the upper end of the container 51.
　第１配管５２Ａにおける側面には、第１配管５２Ａの内部と、容器５１の内部とをつなぐ連通孔５４が設けられている。連通孔５４は、容器５１の内部に貯留した圧縮機２１の潤滑油（潤滑剤）を第１配管５２Ａの内部に流入させる孔である。連通孔５４は、第１配管５２Ａにおける容器５１の内部に配置された領域の下方、言い換えると、容器５１の下端近傍に形成されている。本実施形態では、連通孔５４は、第２配管５２Ｂの開口５３Ｂの近傍に形成されている。 A communication hole 54 that connects the inside of the first pipe 52A and the inside of the container 51 is provided on the side surface of the first pipe 52A. The communication hole 54 is a hole through which the lubricating oil (lubricant) of the compressor 21 stored in the container 51 flows into the first pipe 52A. The communication hole 54 is formed below the region of the first pipe 52 </ b> A disposed inside the container 51, in other words, near the lower end of the container 51. In the present embodiment, the communication hole 54 is formed in the vicinity of the opening 53B of the second pipe 52B.
　連通孔５４の径は、暖房運転時における容器５１の内部にホールドする液体冷媒の量の目標値に基づいて定められる。つまり、暖房運転時に容器５１に流入する液体冷媒の流量と、連通孔５４に流入する液体冷媒の流量とに基づいて定められる。 The diameter of the communication hole 54 is determined based on a target value of the amount of liquid refrigerant held in the container 51 during the heating operation. That is, it is determined based on the flow rate of the liquid refrigerant flowing into the container 51 during the heating operation and the flow rate of the liquid refrigerant flowing into the communication hole 54.
　第２配管５２Ｂは、図１および図２に示すように、容器５１と膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄとの間を冷媒が流通可能に接続する配管である。言い換えると、容器５１と室内熱交換器４１との間を冷媒が流通可能に接続する配管である。
　第２配管５２Ｂは、図２に示すように、容器５１の下端から容器５１の内部に挿入されている。第２配管５２Ｂにおける容器５１内とつながる開口５３Ｂは、容器５１の下端近傍に配置されている。 As shown in FIGS. 1 and 2, the second pipe 52B is a pipe that connects the refrigerant between the container 51 and the expansion valves 24A, 24B, 24C, and 24D. In other words, the pipe connects the container 51 and the indoor heat exchanger 41 so that the refrigerant can flow therethrough.
As shown in FIG. 2, the second pipe 52 </ b> B is inserted into the container 51 from the lower end of the container 51. An opening 53 </ b> B connected to the inside of the container 51 in the second pipe 52 </ b> B is disposed in the vicinity of the lower end of the container 51.
　膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄは、通過する冷媒を断熱膨張させるものであり、冷媒の温度および圧力を低下させるものである。膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄは、それぞれ室内機４Ａ，４Ｂ，４Ｃ，４Ｄに対応して配置、言い換えると、冷媒が流通可能に接続されている。具体的には、膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄは、レシーバ５０から延びる１本の配管を室内機４Ａ，４Ｂ，４Ｃ，４Ｄに対応して分岐させた４つの配管にそれぞれ配置されている。 The expansion valves 24A, 24B, 24C and 24D are for adiabatically expanding the refrigerant passing therethrough, and for reducing the temperature and pressure of the refrigerant. The expansion valves 24A, 24B, 24C, and 24D are arranged corresponding to the indoor units 4A, 4B, 4C, and 4D, in other words, are connected so that the refrigerant can flow therethrough. Specifically, the expansion valves 24A, 24B, 24C, and 24D are respectively arranged in four pipes that branch from one pipe extending from the receiver 50 in correspondence with the indoor units 4A, 4B, 4C, and 4D. .
　液側操作弁２５Ａ，２５Ｂ，２５Ｃ，２５Ｄは、室内機４Ａ，４Ｂ，４Ｃ，４Ｄから延びる配管と接続される部分であって、室内機４Ａ，４Ｂ，４Ｃ，４Ｄのそれぞれに対応して配置された操作弁である。液側操作弁２５Ａ，２５Ｂ，２５Ｃ，２５Ｄは、膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄと対応して配置され、両者の間には、音消しキャピラリ３６およびストレーナ３７が配置されている。 The liquid side operation valves 25A, 25B, 25C, and 25D are portions connected to pipes extending from the indoor units 4A, 4B, 4C, and 4D, and are arranged corresponding to the indoor units 4A, 4B, 4C, and 4D, respectively. It is an operated valve. The liquid side operation valves 25A, 25B, 25C, and 25D are disposed corresponding to the expansion valves 24A, 24B, 24C, and 24D, and a sound deadening capillary 36 and a strainer 37 are disposed therebetween.
　ガス側操作弁２６Ａ，２６Ｂ，２６Ｃ，２６Ｄは、室内機４Ａ，４Ｂ，４Ｃ，４Ｄから延びる配管と接続される部分であって、室内機４Ａ，４Ｂ，４Ｃ，４Ｄのそれぞれに対応して配置された操作弁である。ガス側操作弁２６Ａ，２６Ｂ，２６Ｃ，２６Ｄは、マニフォールド３８を介して四方弁２２と冷媒が流通可能に接続されている。 The gas side operation valves 26A, 26B, 26C, and 26D are portions connected to pipes extending from the indoor units 4A, 4B, 4C, and 4D, and are arranged corresponding to the indoor units 4A, 4B, 4C, and 4D, respectively. It is an operated valve. The gas side operation valves 26A, 26B, 26C, and 26D are connected to the four-way valve 22 through the manifold 38 so that the refrigerant can flow therethrough.
　室内機４Ａ，４Ｂ，４Ｃ，４Ｄには、図１に示すように、室内熱交換器４１と、吸込センサ４２と、中央熱交センサ４３と、冷房出口熱交センサ４４と、が主に設けられている。 As shown in FIG. 1, the indoor units 4A, 4B, 4C, and 4D are mainly provided with an indoor heat exchanger 41, a suction sensor 42, a central heat exchange sensor 43, and a cooling outlet heat exchange sensor 44. It has been.
　室内熱交換器４１は、それぞれ室内機４Ａ，４Ｂ，４Ｃ，４Ｄに配置され、室内の空気と冷媒との間で熱交換を行うものである。具体的には、冷房運転時には、室内空気の熱を冷媒に吸熱させるものであり、暖房運転時には、冷媒の熱を室内空気に放熱させるものである。
　室内機４Ａ，４Ｂ，４Ｃ，４Ｄの室内熱交換器４１は、それぞれ液側操作弁２５Ａ，２５Ｂ，２５Ｃ，２５Ｄと、ガス側操作弁２６Ａ，２６Ｂ，２６Ｃ，２６Ｄと、に冷媒が流通可能に接続されている。 The indoor heat exchanger 41 is disposed in each of the indoor units 4A, 4B, 4C, and 4D, and performs heat exchange between the indoor air and the refrigerant. Specifically, the heat of the room air is absorbed by the refrigerant during the cooling operation, and the heat of the refrigerant is radiated to the room air during the heating operation.
The indoor heat exchanger 41 of the indoor units 4A, 4B, 4C, and 4D allows refrigerant to flow through the liquid side operation valves 25A, 25B, 25C, and 25D and the gas side operation valves 26A, 26B, 26C, and 26D, respectively. It is connected.
　室内熱交換器４１には、室内機４Ａ，４Ｂ，４Ｃ，４Ｄに吸い込まれた室内空気の温度を測定する吸込センサ４２と、室内熱交換器４１における中央部の温度を測定する中央熱交センサ４３と、冷房時における冷媒出口となる室内熱交換器４１の端部温度を測定する冷房出口熱交センサ４４と、が配置されている。 The indoor heat exchanger 41 includes a suction sensor 42 that measures the temperature of indoor air sucked into the indoor units 4A, 4B, 4C, and 4D, and a central heat exchange sensor that measures the temperature of the central portion of the indoor heat exchanger 41. 43 and a cooling outlet heat exchange sensor 44 that measures the end temperature of the indoor heat exchanger 41 that serves as a refrigerant outlet during cooling.
　次に、上記の構成からなる空気調和機１における冷房運転および暖房運転について説明する。 Next, the cooling operation and the heating operation in the air conditioner 1 having the above configuration will be described.
　冷房運転が行われる場合には、図１に示すように、四方弁２２が切り替えられ、圧縮機２１の吐出口と室外熱交換器２３とが接続され、圧縮機２１の吸入口と室内熱交換器４１とが接続される。
　圧縮機２１から吐出された高温高圧の冷媒は、マフラ２９および四方弁２２を介して、室外熱交換器２３に流入する。冷媒は室外熱交換器２３において熱を室外空気に放出して凝縮し、液体冷媒となる。高圧の液体冷媒は、室外熱交換器２３からレシーバ５０を介して膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄに導かれる。 When the cooling operation is performed, as shown in FIG. 1, the four-way valve 22 is switched, the discharge port of the compressor 21 and the outdoor heat exchanger 23 are connected, and the suction port of the compressor 21 and the indoor heat exchange are connected. The device 41 is connected.
The high-temperature and high-pressure refrigerant discharged from the compressor 21 flows into the outdoor heat exchanger 23 through the muffler 29 and the four-way valve 22. In the outdoor heat exchanger 23, the refrigerant releases heat to the outdoor air and condenses to become a liquid refrigerant. The high-pressure liquid refrigerant is led from the outdoor heat exchanger 23 to the expansion valves 24A, 24B, 24C, and 24D via the receiver 50.
　高圧の液体冷媒は、膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄを通過する際に断熱膨張し、低温低圧の冷媒となる。低温低圧の冷媒は、音消しキャピラリ３６、ストレーナ３７および液側操作弁２５Ａ，２５Ｂ，２５Ｃ，２５Ｄを介して室内機４Ａ，４Ｂ，４Ｃ，４Ｄの室内熱交換器４１に流入する。冷媒は室内熱交換器４１において室内空気から熱を吸収して蒸発し、気体冷媒となる。その一方で、室内空気は熱を奪われて冷却される。 The high-pressure liquid refrigerant undergoes adiabatic expansion when passing through the expansion valves 24A, 24B, 24C, and 24D, and becomes a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant flows into the indoor heat exchanger 41 of the indoor units 4A, 4B, 4C, and 4D through the silencer capillary 36, the strainer 37, and the liquid side operation valves 25A, 25B, 25C, and 25D. The refrigerant absorbs heat from indoor air in the indoor heat exchanger 41 and evaporates to become a gaseous refrigerant. On the other hand, the indoor air is deprived of heat and cooled.
　気体冷媒は、ガス側操作弁２６Ａ，２６Ｂ，２６Ｃ，２６Ｄ、マニフォールド３８、四方弁２２、別置アキュムレータ２８およびアキュムレータ２７を介して圧縮機２１の吸入口に吸入される。吸入された冷媒は圧縮機２１により圧縮され、高温高圧の冷媒として吐出口から吐出される。以後、上述の過程が繰り返されることにより冷房運転が継続される。 The gaseous refrigerant is sucked into the suction port of the compressor 21 through the gas side operation valves 26A, 26B, 26C, and 26D, the manifold 38, the four-way valve 22, the separate accumulator 28, and the accumulator 27. The sucked refrigerant is compressed by the compressor 21 and discharged from the discharge port as a high-temperature and high-pressure refrigerant. Thereafter, the cooling operation is continued by repeating the above-described process.
　暖房運転が行われる場合には、図１に示すように、四方弁２２が切り替えられ、圧縮機２１の吐出口と室内熱交換器４１とが接続され、圧縮機２１の吸入口と室外熱交換器２３とが接続される。
　圧縮機２１から吐出された高温高圧の冷媒は、マフラ２９および四方弁２２を介して、室内熱交換器４１に流入する。冷媒は室内熱交換器４１において熱を室内空気に放出して凝縮し、液体冷媒となる。その一方で、室内空気は熱を吸収して加熱される。高圧の液体冷媒は、室内熱交換器４１から液側操作弁２５Ａ，２５Ｂ，２５Ｃ，２５Ｄ、ストレーナ３７および音消しキャピラリ３６を介して膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄに導かれる。 When the heating operation is performed, as shown in FIG. 1, the four-way valve 22 is switched, the discharge port of the compressor 21 and the indoor heat exchanger 41 are connected, and the suction port of the compressor 21 and the outdoor heat exchange are connected. The device 23 is connected.
The high-temperature and high-pressure refrigerant discharged from the compressor 21 flows into the indoor heat exchanger 41 through the muffler 29 and the four-way valve 22. In the indoor heat exchanger 41, the refrigerant releases heat to the indoor air and condenses to become a liquid refrigerant. On the other hand, indoor air absorbs heat and is heated. The high-pressure liquid refrigerant is guided from the indoor heat exchanger 41 to the expansion valves 24A, 24B, 24C, and 24D via the liquid side operation valves 25A, 25B, 25C, and 25D, the strainer 37, and the sound-eliminating capillary 36.
　高圧の液体冷媒は、膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄを通過する際に断熱膨張し、低温低圧の冷媒となる。低温低圧の冷媒は、レシーバ５０を介して室外熱交換器２３に流入する。冷媒は室外熱交換器２３において室外空気から熱を吸収して蒸発し、気体冷媒となる。 The high-pressure liquid refrigerant undergoes adiabatic expansion when passing through the expansion valves 24A, 24B, 24C, and 24D, and becomes a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant flows into the outdoor heat exchanger 23 via the receiver 50. The refrigerant absorbs heat from the outdoor air in the outdoor heat exchanger 23 and evaporates to become a gaseous refrigerant.
　気体冷媒は、四方弁２２、別置アキュムレータ２８およびアキュムレータ２７を介して圧縮機２１の吸入口に吸入される。吸入された冷媒は圧縮機２１により圧縮され、高温高圧の冷媒として吐出口から吐出される。以後、上述の過程が繰り返されることにより冷房運転が継続される。 The gaseous refrigerant is sucked into the suction port of the compressor 21 through the four-way valve 22, the separate accumulator 28 and the accumulator 27. The sucked refrigerant is compressed by the compressor 21 and discharged from the discharge port as a high-temperature and high-pressure refrigerant. Thereafter, the cooling operation is continued by repeating the above-described process.
　次に、本実施形態の特徴であるレシーバ５０における冷媒の流れおよび貯留について説明する。
　最初に暖房運転時におけるレシーバ５０への液体冷媒の貯留、言い換えると、レシーバ５０による液体冷媒のホールドについて説明する。 Next, the refrigerant flow and storage in the receiver 50, which is a feature of the present embodiment, will be described.
First, the storage of the liquid refrigerant in the receiver 50 during the heating operation, in other words, the holding of the liquid refrigerant by the receiver 50 will be described.
　空気調和機１における暖房運転時には、膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄにより減圧された気体冷媒および液体冷媒が混合した冷媒が、第２配管５２Ｂを通じてレシーバ５０に流入する。気体冷媒は第１配管５２Ａの上端に形成された開口５３Ａから配管内に流入してレシーバ５０から流出する。そのため、液体冷媒の大半は容器の内部にホールドされる。一部の液体冷媒は、第１配管５２Ａの側面に形成された連通孔５４から、液体冷媒に含まれる潤滑油とともに配管内に流入してレシーバ５０から流出する。
　第２配管５２Ｂから容器５１に流入する液体冷媒の流量と比較して、連通孔５４を通過して容器５１から流出する液体冷媒の流量は少ないため、空気調和機１の暖房運転時であっても、液体冷媒をレシーバ５０にホールドされる。 During the heating operation of the air conditioner 1, the refrigerant in which the gas refrigerant and the liquid refrigerant decompressed by the expansion valves 24A, 24B, 24C, 24D are mixed flows into the receiver 50 through the second pipe 52B. The gaseous refrigerant flows into the pipe from the opening 53A formed at the upper end of the first pipe 52A and flows out from the receiver 50. Therefore, most of the liquid refrigerant is held inside the container. A part of the liquid refrigerant flows into the pipe together with the lubricating oil contained in the liquid refrigerant from the communication hole 54 formed on the side surface of the first pipe 52 </ b> A and flows out from the receiver 50.
Compared with the flow rate of the liquid refrigerant flowing into the container 51 from the second pipe 52B, the flow rate of the liquid refrigerant flowing through the communication hole 54 and out of the container 51 is small. Also, the liquid refrigerant is held in the receiver 50.
　ここで、第１配管５２Ａにおける開口５３Ａは、容器５１の上端近傍に配置することにより、液体冷媒の液面が開口５３Ａまで上昇して始めて、液体冷媒が第１配管５２Ａを通じてレシーバ５０の外へ流出する。言い換えると、容器５１の内部にホールドされる液体冷媒の量が増やされる。さらに、連通孔５４を容器５１の下端近傍に配置することにより、容器５１の下方に溜まりやすい潤滑油は、容易に連通孔５４を介して一方の配管の内部に流入する。 Here, the opening 53A in the first pipe 52A is arranged in the vicinity of the upper end of the container 51, so that the liquid refrigerant begins to rise up to the opening 53A, and the liquid refrigerant goes out of the receiver 50 through the first pipe 52A. leak. In other words, the amount of liquid refrigerant held in the container 51 is increased. Furthermore, by arranging the communication hole 54 in the vicinity of the lower end of the container 51, the lubricating oil that tends to accumulate below the container 51 easily flows into one pipe through the communication hole 54.
　空気調和機１における冷房運転時には、暖房運転時とは冷媒の流れ方向が逆になり、室外熱交換器２３により凝縮された液体冷媒が、第１配管５２Ａを通じてレシーバ５０に流入する。液体冷媒は、第２配管５２Ｂを通じて膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄに流入するが、膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄを通過する液体冷媒の流量は制限されているため、余剰な液体冷媒はレシーバ５０に溜まる。そのため、冷房運転時にレシーバ５０には、液体冷媒が一時的に貯留される。
　先行技術文献に記載された可逆方向レシーバと比較して、容器の内部に第１配管５２Ａが配置された領域と第２配管５２Ｂが配置された領域とを区画する仕切り板が設けられていないため、冷媒がレシーバ５０を通過する際の流れ抵抗が小さくなる。 During the cooling operation of the air conditioner 1, the flow direction of the refrigerant is reversed from that during the heating operation, and the liquid refrigerant condensed by the outdoor heat exchanger 23 flows into the receiver 50 through the first pipe 52A. The liquid refrigerant flows into the expansion valves 24A, 24B, 24C, and 24D through the second pipe 52B. However, since the flow rate of the liquid refrigerant that passes through the expansion valves 24A, 24B, 24C, and 24D is limited, the excess liquid refrigerant Accumulates in the receiver 50. Therefore, the liquid refrigerant is temporarily stored in the receiver 50 during the cooling operation.
Compared to the reversible direction receiver described in the prior art document, there is no partition plate that divides the region where the first pipe 52A is arranged and the region where the second pipe 52B is arranged inside the container. The flow resistance when the refrigerant passes through the receiver 50 is reduced.
　ここで、容器５１の内部では液体冷媒は下方に溜まり、気体冷媒は上方に溜まりやすい。膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄへ冷媒を供給する第２配管５２Ｂの開口５３Ｂを、容器５１の下端近傍に配置することにより、開口５３Ｂを溜まった液体冷媒の内部に配置させることができ、膨張弁２４Ａ，２４Ｂ，２４Ｃ，２４Ｄへ液体冷媒を供給しやすくなる。 Here, in the container 51, the liquid refrigerant accumulates downward, and the gas refrigerant easily accumulates upward. By arranging the opening 53B of the second pipe 52B for supplying the refrigerant to the expansion valves 24A, 24B, 24C, 24D in the vicinity of the lower end of the container 51, the opening 53B can be arranged inside the accumulated liquid refrigerant, It becomes easy to supply the liquid refrigerant to the expansion valves 24A, 24B, 24C, and 24D.
　上記の構成によれば、暖房運転時であってもレシーバ５０に液体冷媒をホールドすることができるようになり、室外機２に接続される室内機４Ａ，４Ｂ，４Ｃ，４Ｄの台数を減らしても、室内熱交換器４１などにおける冷媒の圧力が過度に上昇することを防止することができる。言い換えると、空気調和機１における室内機４Ａ，４Ｂ，４Ｃ，４Ｄの最小接続台数を減らすことができ、空気調和機１における据え付けバリエーションを増やすことができ、より広い範囲で市場ニーズに合致した空気調和機１を提供することができる。 According to the above configuration, the liquid refrigerant can be held in the receiver 50 even during heating operation, and the number of indoor units 4A, 4B, 4C, 4D connected to the outdoor unit 2 can be reduced. In addition, it is possible to prevent the refrigerant pressure in the indoor heat exchanger 41 and the like from rising excessively. In other words, the minimum number of indoor units 4A, 4B, 4C, 4D in the air conditioner 1 can be reduced, the number of installation variations in the air conditioner 1 can be increased, and air that meets market needs in a wider range. The harmony machine 1 can be provided.
　１　空気調和機
　２　室外機
　４Ａ，４Ｂ，４Ｃ，４Ｄ　室内機
　２３　室外熱交換器
　２４Ａ，２４Ｂ，２４Ｃ，２４Ｄ　膨張弁（絞り機構）
　４１　室内熱交換器
　５０　レシーバ（可逆方向レシーバ）
　５１　容器
　５２Ａ　第１配管（一方の配管）
　５２Ｂ　第２配管（他方の配管）
　５３Ａ　開口
　５３Ｂ　開口
　５４　連通孔 DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Outdoor unit 4A, 4B, 4C, 4D Indoor unit 23 Outdoor heat exchanger 24A, 24B, 24C, 24D Expansion valve (throttle mechanism)
41 Indoor heat exchanger 50 Receiver (Reversible receiver)
51 container 52A first pipe (one pipe)
52B Second piping (the other piping)
53A opening 53B opening 54 communication hole

Claims (3)

  1. 　冷媒の流れ方向が可逆的に切替可能なヒートポンプ式の空気調和機に用いられる可逆方向レシーバであって、
    　内部に前記冷媒を貯留する容器と、
    　前記容器の下方から上方に向かって延びるとともに上端に開口を有し、前記空気調和機が冷房運転時に前記容器に前記冷媒を流入させ、暖房運転時に前記容器から前記冷媒を流出させる一方の配管と、
    　前記容器の下方から上方に向かって延びるとともに上端に開口を有し、前記空気調和機が冷房運転時に前記容器から前記冷媒を流出させ、暖房運転時に前記容器に前記冷媒を流入させる他方の配管と、
    が設けられ、
    　前記一方の配管は前記他方の配管よりも上方まで延びるとともに、前記一方の配管における前記容器内に配置された領域の側面には、前記一方の配管および前記容器の内部をつなぐ連通孔が設けられ、
    　前記他方の配管は、前記空気調和機における前記冷媒の圧力を減圧させる絞り機構に接続されている可逆方向レシーバ。     A reversible direction receiver used in a heat pump type air conditioner capable of reversibly switching the flow direction of the refrigerant,
    A container for storing the refrigerant therein;
    One pipe extending from the bottom to the top of the container and having an opening at the upper end, and the air conditioner allows the refrigerant to flow into the container during cooling operation and allows the refrigerant to flow out from the container during heating operation; ,
    The other pipe extending from the bottom to the top of the container and having an opening at the upper end thereof, the air conditioner causes the refrigerant to flow out of the container during cooling operation, and allows the refrigerant to flow into the container during heating operation; ,
    Is provided,
    The one pipe extends to a position higher than the other pipe, and a communication hole that connects the one pipe and the inside of the container is provided on a side surface of an area of the one pipe disposed in the container. ,
    The other pipe is a reversible direction receiver connected to a throttle mechanism for reducing the pressure of the refrigerant in the air conditioner.
  2. 　前記他方の配管における前記開口および前記連通孔は、前記容器の下端近傍に配置され、
    　前記一方の配管における前記開口は、前記容器の上端近傍に配置されている請求項１記載の可逆方向レシーバ。     The opening and the communication hole in the other pipe are arranged near the lower end of the container,
    The reversible direction receiver according to claim 1, wherein the opening in the one pipe is disposed in the vicinity of an upper end of the container.
  3. 　室外熱交換器を有する室外機と、
    　室内熱交換器を有する室内機と、
    　請求項１または２に記載の可逆方向レシーバと、
    が設けられ、
    　前記一方の配管は、前記室外熱交換器と前記冷媒が流通可能に接続され、
    　前記他方の配管は、前記絞り機構を介して前記室内熱交換器と前記冷媒が流通可能に接続されている空気調和機。     An outdoor unit having an outdoor heat exchanger;
    An indoor unit having an indoor heat exchanger;
    Reversible direction receiver according to claim 1 or 2,
    Is provided,
    The one pipe is connected so that the outdoor heat exchanger and the refrigerant can flow,
    The other pipe is an air conditioner in which the indoor heat exchanger and the refrigerant are connected to each other through the throttle mechanism.
PCT/JP2011/050636 2010-02-10 2011-01-17 Reversible receiver, and air conditioner WO2011099323A1 (en)

Priority Applications (1)

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JP2010-027738 2010-02-10
JP2010027738A JP2011163674A (en) 2010-02-10 2010-02-10 Reversible receiver and air conditioner

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JP7303172B2 (en) * 2015-07-30 2023-07-04 ダイキン工業株式会社 refrigeration equipment
CN105241132B (en) * 2015-09-17 2017-10-20 芜湖三花制冷配件有限公司 A kind of production technology of reservoir
DE102017107051A1 (en) * 2017-04-01 2018-10-04 Viessmann Werke Gmbh & Co Kg heat pump
US11592216B2 (en) 2018-09-12 2023-02-28 Carrier Corporation Liquid receiver for heating, air conditioning and refrigeration system

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