WO2016188295A1 - 热回收多联机的室外机及热回收多联机 - Google Patents

热回收多联机的室外机及热回收多联机 Download PDF

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Publication number
WO2016188295A1
WO2016188295A1 PCT/CN2016/080405 CN2016080405W WO2016188295A1 WO 2016188295 A1 WO2016188295 A1 WO 2016188295A1 CN 2016080405 W CN2016080405 W CN 2016080405W WO 2016188295 A1 WO2016188295 A1 WO 2016188295A1
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WO
WIPO (PCT)
Prior art keywords
valve
port
check valve
outdoor unit
heat recovery
Prior art date
Application number
PCT/CN2016/080405
Other languages
English (en)
French (fr)
Inventor
杨国忠
李越铭
Original Assignee
广东美的暖通设备有限公司
美的集团股份有限公司
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Filing date
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Application filed by 广东美的暖通设备有限公司, 美的集团股份有限公司 filed Critical 广东美的暖通设备有限公司
Priority to BR112016030016A priority Critical patent/BR112016030016A2/pt
Priority to US15/325,892 priority patent/US10260785B2/en
Priority to EP16799184.3A priority patent/EP3208547B1/en
Publication of WO2016188295A1 publication Critical patent/WO2016188295A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/04—Desuperheaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • F24F1/10—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F24F1/16—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/147—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with both heat and humidity transfer between supplied and exhausted air
    • 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
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/028—Evaporators having distributing means
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements

Definitions

  • the invention relates to the field of refrigeration equipment, in particular to an outdoor unit for heat recovery multi-connection and a multi-connection of heat recovery.
  • Heat recovery multi-connection In the heating mode, the outdoor heat exchanger as the evaporator can accommodate less refrigerant than the refrigerant that can be contained in the cooling mode, and the excess refrigerant is usually stored in the gas-liquid separator. Specifically, in the heating mode, the refrigerant flows through the refrigerant to the throttling element in the switching device, and the gas-liquid two-phase enters the pipe, and the amount of the refrigerant that can be stored is small due to the large amount of gaseous refrigerant in the pipe. More liquid refrigerant is stored in the gas-liquid separator at this time, and even overflows with the gas-liquid separator, which directly causes the compressor suction superheat to decrease.
  • the exhaust port of the compressor and the return air port are usually communicated through a hot gas bypass solenoid valve.
  • the hot gas bypass solenoid valve is opened to increase the suction superheat.
  • the present invention aims to solve at least one of the technical problems in the related art to some extent.
  • the present invention proposes an outdoor unit for heat recovery multi-connection, which is advantageous for the compressor to obtain the suction superheat, and at the same time, can improve the energy efficiency of the heat recovery multi-connection.
  • the invention also proposes a heat recovery multi-connection, including the above-mentioned outdoor unit of heat recovery multi-connection.
  • the outdoor unit has a first interface and a second interface
  • the outdoor unit includes: a compressor having an exhaust port and a return port; a reversing assembly, The reversing assembly has a first valve port to a fourth valve port, the first valve port is connected to the exhaust port, the second valve port is connected to the air return port, and the third valve port is
  • the first interface is connected to the outdoor heat exchanger, the first end of the outdoor heat exchanger is connected to the fourth valve port, and the second end of the outdoor heat exchanger is connected to the second interface; a one-way valve, each of the one-way valves having a conductive end and a cut-off end, each of the one-way valves being unidirectionally conducting in a direction from the conductive end to the cut-off end, the plurality of singles
  • the valve includes first to sixth one-way valves, a conduction end of the first one-way valve is connected to the fourth valve port, and a cut-off end of the
  • a cut-off end between the second check valve and the third valve port and the fifth check valve is connected between the fourth check valve and the second interface
  • the sixth one-way a conductive end of the valve is connected between the fourth one-way valve and the outdoor heat exchanger
  • a cut-off end of the sixth one-way valve is connected to the first check valve and the fourth valve port a throttling element, the throttling element being connected in series between the third one-way valve and the outdoor heat exchanger
  • a gas-liquid separator comprising a second inlet and a gas outlet, The second inlet is connected to the second valve port, and the gas outlet is connected to the gas return port.
  • the refrigerant flow is completely opened to the throttle element in the switching device, and is connected in series between the third check valve and the outdoor heat exchanger.
  • the throttling element depressurizes the refrigerant before the refrigerant flows into the outdoor heat exchanger, so that the pressure of the two-phase refrigerant in the pipe can be raised and the dryness can be reduced, so that more refrigerant is accumulated in the pipe to reduce the gas.
  • the amount of refrigerant stored in the liquid separator which in turn increases the suction superheat of the compressor, can also improve the energy efficiency of the heat recovery multi-connection to a certain extent.
  • the outdoor heat exchanger includes a plurality of first heat exchange channels arranged in sequence in the up and down direction, and the first end of each of the first heat exchange channels and the first one direction
  • a first control valve for controlling the flow or shutoff of the refrigerant is connected in series between the valves.
  • the heat recovery multi-connected outdoor unit further includes a plurality of seventh check valves, wherein the plurality of seventh check valves are disposed in one-to-one correspondence with the plurality of first heat exchange channels, each of the seventh The conductive end of the one-way valve is connected to the second end of the corresponding first heat exchange passage and the cut-off end of each of the seventh one-way valves is connected to the sixth one-way valve.
  • the outdoor heat exchanger further includes a second heat exchange channel located at a lowermost portion, and two ends of the second heat exchange channel are respectively connected to the exhaust port and the second interface, and the second A second control valve for controlling the circulation or shutoff of the refrigerant is connected in series between the heat exchange passage and the exhaust port.
  • the throttling element is an electronic expansion valve.
  • the heat recovery multi-connected outdoor unit further includes an air supply passage, and two ends of the air supply passage are respectively connected to the exhaust port and the second interface, and the air supply passage is A third control valve for controlling the flow or shutoff of the refrigerant is connected in series.
  • the third control valve is a solenoid valve.
  • the heat recovery multi-connected outdoor unit further includes an oil separator including a first inlet, a refrigerant outlet, and an oil outlet, the first inlet being connected to the exhaust port, The refrigerant outlet is connected to the first valve port, and the oil outlet is connected to the air return port.
  • an oil separator including a first inlet, a refrigerant outlet, and an oil outlet, the first inlet being connected to the exhaust port, The refrigerant outlet is connected to the first valve port, and the oil outlet is connected to the air return port.
  • the heat recovery multi-connection according to the present invention includes the above-described outdoor unit of heat recovery multi-connection.
  • the suction superheat of the compressor can be improved, and the energy efficiency of the heat recovery multi-connection can be improved.
  • FIG. 1 is a schematic view of an outdoor unit according to an embodiment of the present invention.
  • first interface 11 a first interface 11; a second interface 12;
  • Compressor 2 exhaust port a; return port b;
  • a first check valve 51 a first check valve 51; a second check valve 52; a third check valve 53; a fourth check valve 54; a fifth check valve 55; a sixth check valve 56; a seventh check valve 57;
  • Throttle element 6
  • Oil separator 8 first inlet g; refrigerant outlet h; oil outlet i;
  • Gas-liquid separator 9 Gas-liquid separator 9; second inlet j; gas outlet k.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For The specific meanings of the above terms in the present invention can be understood by those skilled in the art on a case-by-case basis.
  • An outdoor unit 100 for heat recovery multi-connection according to an embodiment of the present invention is described below with reference to FIG. 1, wherein the outdoor unit 100 has a first interface 11 and a second interface 12, and the outdoor unit 100 passes through the first interface 11 and the second interface 12 and the refrigerant.
  • the flow switching device and the plurality of indoor units are collectively assembled into a heat recovery multiple connection for adjusting the indoor temperature.
  • the heat recovery multi-connection has a pure cooling mode, a main cooling mode, a main heating mode, and a pure heating mode.
  • the pure cooling mode refers to that the indoor units in operation are all cooled; the pure heating mode refers to the running indoor units. Heating; the main cooling mode refers to a part of the indoor unit for cooling and a part of the indoor unit for heating, the cooling load is greater than the heating load, and the outdoor heat exchanger 4 is a condenser; the main heating mode refers to a part of the indoor mechanism heat and A part of the indoor unit is cooled, the heating load is greater than the cooling load, and the outdoor heat exchanger 4 is used as an evaporator.
  • the heating mode in the embodiment of the present invention includes a main heating mode and a pure heating mode, and the cooling mode includes a main cooling mode and a pure cooling mode.
  • the outdoor unit 100 for heat recovery multi-connection may include a compressor 2, a reversing unit 3, an outdoor heat exchanger 4, a plurality of check valves, a throttle element 6, and a gas-liquid separator 9, wherein
  • the compressor 2 has an exhaust port a and a return port b. It should be noted that the structure and working principle of the compressor 2 are both prior art and will not be described in detail herein.
  • the reversing assembly 3 has a first valve port c to a fourth valve port f, wherein the first valve port c communicates with one of the third valve port e and the fourth valve port f, and the second valve port d and the third port
  • the other of the valve port e and the fourth valve port f is in communication, that is, when the first valve port c is in communication with the third valve port e, the second valve port d is in communication with the fourth valve port f, when When one valve port c communicates with the fourth valve port f, the second valve port d communicates with the third valve port e.
  • the reversing assembly 3 is a four-way valve, but it will be understood that the reversing assembly 3 may be formed in other configurations as long as it has the first to fourth valve ports c-f and has a reversing function.
  • the first valve port c is connected to the exhaust port a
  • the second valve port d is connected to the air return port b
  • the third valve port e is connected to the first port 11
  • the first end and the fourth port port f of the outdoor heat exchanger 4 Connected the second end of the outdoor heat exchanger 4 is connected to the second interface 12.
  • the outdoor unit 100 may further include a fan for guiding the wind to the outdoor heat exchanger 4 to accelerate the heat exchange efficiency of the outdoor heat exchanger 4.
  • Each one-way valve has a conducting end and a cut-off end, and each one-way valve is unidirectionally guided in a direction from the conducting end to the cut-off end, that is, the refrigerant can only enter the check valve from the conducting end, It flows out from the cut-off end of the check valve and cannot enter the check valve from the cut-off end, so that the check valve functions as a one-way guide.
  • the plurality of one-way valves includes first to sixth one-way valves 51-56, the conduction end of the first one-way valve 51 is connected to the fourth valve port f, and the cut-off end of the first one-way valve 51 is connected to the outdoor heat exchanger The first end of the fourth end is connected, whereby by providing the first check valve 51, the refrigerant can only flow from the fourth valve port f to the first end of the outdoor heat exchanger 4, but not from the first of the outdoor heat exchanger 4 The end flows to the fourth port f.
  • the conductive end of the second check valve 52 is connected to the first port 11 and the cut end of the second check valve 52 is connected to the third port e Further, by providing the second check valve 52, the refrigerant can flow only from the first port 11 to the third port e, and cannot flow from the third port e to the first port 11.
  • the conductive end of the third check valve 53 is connected between the second check valve 52 and the first interface 11 and the cut end of the third check valve 53 is connected to the first end of the outdoor heat exchanger 4, thereby There is a third check valve 53, and the refrigerant can only flow from the first port 11 to the first end of the outdoor heat exchanger 4, and cannot flow from the first end of the outdoor heat exchanger 4 to the first port 11.
  • the conductive end of the fourth check valve 54 is connected to the second end of the outdoor heat exchanger 4 and the cut end of the fourth check valve 54 is connected to the second port 12, so that the fourth check valve 54 is provided, the refrigerant It can only flow from the second end of the outdoor heat exchanger 4 to the second port 12, and cannot flow from the second port 12 to the second end of the outdoor heat exchanger 4.
  • the conductive end of the fifth check valve 55 is connected between the second check valve 52 and the third valve port e and the cut end of the fifth check valve 55 is connected to the fourth check valve 54 and the second interface 12 Therefore, by providing the fifth check valve 55, the refrigerant can flow only from the third port port e to the second port 12, and cannot flow from the second port 12 to the third port port e.
  • the conductive end of the sixth check valve 56 is connected between the fourth check valve 54 and the outdoor heat exchanger 4 and the cut end of the sixth check valve 56 is connected to the first check valve 51 and the fourth valve port f Therefore, by providing the sixth check valve 56, the refrigerant can only flow from the second end of the outdoor heat exchanger 4 to the fourth valve port f, and cannot flow from the fourth valve port f to the outdoor heat exchanger 4 Two ends.
  • the gas-liquid separator 9 includes a second inlet j and a gas outlet k, the second inlet j is connected to the second valve port d, and the gas outlet k is connected to the gas return port b, thereby passing through the second valve port d and the compressor 2
  • a gas-liquid separator 9 is disposed between the air return ports b, so that the refrigerant discharged from the second valve port d can be separated into the gas-liquid separator 9 by gas-liquid separation, and the separated gaseous refrigerant can be discharged from the gas outlet k to the compression.
  • the liquid refrigerant is stored in the gas-liquid separator 9, thereby avoiding the liquid hammer phenomenon of the compressor 2 and improving the operational reliability of the outdoor unit 100.
  • the throttling element 6 is connected in series between the third check valve 53 and the outdoor heat exchanger 4.
  • the refrigerant flows to the throttling element in the switching device, and the throttling element 6 is in the refrigerant flow.
  • the refrigerant is throttled down, so that the pressure of the two-phase refrigerant in the piping can be raised and the dryness can be reduced, thereby increasing the amount of refrigerant in the piping, thereby reducing the amount of refrigerant in the gas-liquid separator 9.
  • the amount of refrigerant storage increases the suction superheat of the compressor 2, and at the same time improves the energy efficiency of the heat recovery multi-connection.
  • the following describes the application of the outdoor unit 100 in the heat recovery multi-connection, wherein the outdoor unit 100 has two modes: when the heat recovery multiple connection is in the pure cooling mode, the outdoor unit 100 Run the first mode. When the heat recovery multiple connection is in the pure heating mode, the outdoor unit 100 operates the second mode. When a plurality of indoor units simultaneously perform the cooling mode and the heating mode, the outdoor unit 100 operates the first mode or the second mode according to the system judgment.
  • the first mode the first valve port c of the reversing assembly 3 is in communication with the fourth valve port f, and the second valve port d is in communication with the third valve port e.
  • the flow of the heat recovery multi-line refrigerant is: the compressor 2—— First valve port c of the reversing assembly 3 - reversing assembly 3 Fourth valve port f - first check valve 51 - outdoor heat exchanger 4 - fourth check valve 54 - second interface 12 - refrigerant flow direction switching device - indoor unit - first interface 11 - second check valve 52 - third port e of the reversing assembly 3 - second port d of the reversing assembly 3 - compressor 2.
  • the second mode the first valve port c of the reversing component 3 is in communication with the third valve port e and the second valve port d and the fourth valve port f are in communication.
  • the heat recovery is multi-connected to the pure heating mode, the heat recovery is performed.
  • the multi-line refrigerant flow is: compressor 2 - first port c of the reversing assembly 3 - third port e of the reversing assembly 3 - fifth check valve 55 - second interface 12 - Refrigerant flow switching device - indoor unit - first interface 11 - third check valve 53 - throttling element 6 - outdoor heat exchanger 4 - sixth check valve 56 - reversing assembly 3
  • the fourth port f is the second port d of the reversing assembly 3 - the compressor 2.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the outdoor unit 100 passes through the refrigerant flow to the switching device to be condensed into a high-temperature and high-pressure liquid refrigerant in the heating indoor unit, and then divided into two paths, and a part is taken to the cooling chamber.
  • the machine evaporates, a part of the refrigerant flows to the switching device for throttling, and then the two channels merge, and before the return to the outdoor heat exchanger 4, the throttling element 6 is throttled and depressurized, and then returned to the outdoor heat exchanger 4 for evaporation, and then returned. Go to compressor 2.
  • the outdoor unit 100 when there is an indoor unit requiring cooling and heating modes, whether the outdoor unit 100 is in the first mode or the second mode, when the heat recovery is multi-connected in the main cooling mode, the outdoor unit 100 outputs the gas.
  • the liquid mixed refrigerant to the refrigerant flows to the switching device, and the refrigerant flows to the switching device for gas-liquid separation, the superheated gaseous refrigerant enters the heating mechanism, and the supercooled liquid refrigerant enters the refrigeration indoor unit for cooling.
  • the refrigerant output from the outdoor unit 100 is a high-temperature high-pressure gaseous refrigerant.
  • the outdoor unit 100 When the heat recovery is multi-connected in the pure cooling mode, the outdoor unit 100 outputs a liquid refrigerant.
  • the first to sixth check valves 51-56 not only function to separate the flow paths, but also ensure that the refrigerant of the outdoor unit 100 enters the refrigerant flow from the second port 12 to the switching device.
  • the heat recovery multi-connection outdoor unit 100 when the heat recovery multiple connection is in the heating mode, the refrigerant flow is completely opened to the throttle element in the switching device, and the third check valve 53 and the outdoor heat exchange are connected in series.
  • the throttling element 6 between the tubes 4 can depressurize the refrigerant before the refrigerant flows into the outdoor heat exchanger 4, so that the pressure of the two-phase refrigerant in the piping can be raised and the dryness can be reduced, thereby making more
  • the refrigerant is accumulated in the piping to reduce the amount of refrigerant stored in the gas-liquid separator 9, thereby increasing the degree of suction superheat of the compressor 2, and also reducing the energy consumption of the compressor, thereby improving the energy efficiency of the heat recovery multi-connection.
  • the outdoor heat exchanger 4 includes a plurality of first heat exchange passages 41 arranged in this order in the up and down direction, and the first end and the first end of each of the first heat exchange passages 41
  • a first control valve 411 for controlling the circulation or shutoff of the refrigerant is connected in series between the one-way valves 51.
  • each of the first heat exchange passages 41 is controlled by the corresponding first control valve 411, and each of the first heat exchange passages 41 is uncorrelated with each other, thereby being able to control more
  • the opening condition of the first control valve 411 controls the number of the plurality of first heat exchange passages 41, thereby adjusting the volume of the outdoor heat exchanger 4, and adapts the outdoor heat exchanger 4 to the compressor 2, the fan and the refrigerant Flow switching device
  • the refrigerant state of the second interface 12, for example, the plurality of first heat exchange channels 41 can be used simultaneously to meet the large capacity requirement, and only one first heat exchange channel 41 can be used to meet the small capacity requirement.
  • the outdoor heat exchanger 4 can be controlled in blocks to meet different capacity requirements and to make the control more precise.
  • each of the first control valves 411 may be a solenoid valve.
  • the outdoor unit 100 further includes a plurality of seventh check valves 57, and the plurality of seventh check valves 57 are disposed in one-to-one correspondence with the plurality of first heat exchange passages 41, and each of the seventh check valves 57 is turned on.
  • the ends are connected to the second end of the corresponding first heat exchange passage 41 and the cut-off end of each of the seventh check valves 57 is connected to the sixth check valve 56. That is, a first heat exchange passage 41 corresponds to a seventh check valve 57, and the refrigerant can only enter from the conduction end of the seventh check valve 57 into the seventh check valve 57 and from the seventh check valve.
  • the cut-off end of 57 flows out, and cannot flow from the cut-off end of the seventh check valve 57 to the seventh check valve 57.
  • the refrigerant can only flow from the first heat exchange passage 41 to the sixth single
  • the valve 56 is flown from the sixth check valve 56 to the first heat exchange passage 41, thereby further ensuring the reliability of the operation of the outdoor unit 100.
  • the outdoor heat exchanger 4 further includes a second heat exchange passage 42 at the lowermost portion, and two ends of the second heat exchange passage 42 are respectively connected to the exhaust port a and the second port 12,
  • a second control valve 421 for controlling the circulation or shutoff of the refrigerant is connected in series between the two heat exchange passages 42 and the exhaust port a. That is, when the circulation of the refrigerant is controlled by the second control valve 421, the refrigerant in the compressor 2 can be directly discharged from the exhaust port a into the second heat exchange passage 42 for heat exchange, and the refrigerant after the heat exchange is The second interface 12 is discharged into the refrigerant flow direction switching device.
  • the outdoor heat exchanger 4 performs defrosting, the high temperature and high pressure refrigerant is directly discharged into the second heat exchange passage 42 when the outdoor heat exchanger 4 is defoamed.
  • the bottom of the outdoor heat exchanger 4 can be heated by the high temperature and high pressure refrigerant, so that the defrosted liquid water can directly leak from the water hole of the chassis located under the outdoor heat exchanger 4 without being blocked by the ice. Water holes cause safety hazards.
  • the throttling element 6 is an electronic expansion valve. Since the electronic expansion valve is sensitive and has a certain energy saving effect, the use of the electronic expansion valve can not only meet the needs of use, but also improve the sensitivity of the throttling element 6 and Reduce energy consumption to a certain extent.
  • the throttling element 6 can also be formed in other configurations, for example the throttling element 6 can be a thermal expansion valve or a series of capillary and control valves.
  • the outdoor unit 100 further includes a supplemental air passage 7 connected to the exhaust port a and the second interface 12 respectively, and the supplemental air passage 7 is connected in series for controlling the circulation of the refrigerant or The third control valve 71 is cut off.
  • the third control valve 71 is a solenoid valve. Since the solenoid valve is simple in structure, low in price, and sensitive in response, setting the third control valve 71 as a solenoid valve can not only meet the needs of use, but also to some extent. Reduce costs and save assembly space. However, it is to be understood that the third control valve 71 may not be limited to a solenoid valve, and may be other components as long as the refrigerant can be turned on or off.
  • the outdoor heat exchanger 4 can be completely closed by closing the first control valve 411, and at this time, discharged from the exhaust port a of the compressor 2.
  • the refrigerant flows only to the second port 12 through the third control valve 71, and the opening degree of the third control valve 71 is adjusted to meet the smaller capacity requirement.
  • the adjustment of the third control valve 71 can supplement the appropriate gaseous refrigerant to the heating indoor unit.
  • the heat recovery multi-connected outdoor unit 100 further includes an oil separator 8 including a first inlet g, a refrigerant outlet h and an oil outlet i, a first inlet g and an exhaust port a is connected, the refrigerant outlet h is connected to the first valve port c, and the oil outlet i is connected to the return port b, so that the oil separator 8 is connected in series between the compressor 2 and the first valve port c, and is discharged from the exhaust port a.
  • an oil separator 8 including a first inlet g, a refrigerant outlet h and an oil outlet i, a first inlet g and an exhaust port a is connected, the refrigerant outlet h is connected to the first valve port c, and the oil outlet i is connected to the return port b, so that the oil separator 8 is connected in series between the compressor 2 and the first valve port c, and is discharged from the exhaust port a.
  • the refrigerant mixed with the lubricating oil enters the oil separator 8 for separation, and the separated lubricating oil is discharged back to the compressor 2 through the oil outlet i and the return port b, and the separated refrigerant is discharged from the refrigerant outlet h into the reversing assembly. 3. Further, the lubricating oil discharged from the compressor 2 can be recycled, and the compressor 2 can be prevented from malfunctioning due to lack of oil operation, thereby improving the operational reliability of the outdoor unit 100.
  • the suction superheat of the compressor 2 can be improved, and at the same time, the energy efficiency of the heat recovery multi-connection can be improved.
  • the first feature "on” or “under” the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact.
  • the first feature "above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

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Abstract

一种热回收多联机的室外机(100)，室外机(100)包括：压缩机(2)，压缩机(2)具有排气口(a)和回气口(b)；换向组件(3)，换向组件(3)具有第一阀口(c)至第四阀口(f)；室外换热器(4)，室外换热器(4)的第一端与第四阀口(f)相连，室外换热器(4)的第二端与第二接口(12)相连；多个单向阀，每个单向阀具有导通端和截止端，每个单向阀在从导通端到截止端的方向上单向导通；节流元件(6)；气液分离器(9)。同时还提供了具有该室外机的热回收多联机。

Description

热回收多联机的室外机及热回收多联机 技术领域
本发明涉及制冷设备领域，尤其是涉及一种热回收多联机的室外机及热回收多联机。
背景技术
随着空调技术的发展以及人们环保概念的加强，热回收多联机越来越受到市场的欢迎。热回收多联机在制热模式下，室外换热器作为蒸发器所能容纳的冷媒少于制冷模式下作为冷凝器所能容纳的冷媒，多余的冷媒通常储存在气液分离器内。具体而言，在制热模式下，冷媒经冷媒流向切换装置中的节流元件节流降压后形成气液两相进入配管，由于配管内气态冷媒较多导致所能储存的冷媒量很少，较多的液态冷媒此时储存在气液分离器内，甚至满溢气液分离器，这直接导致压缩机吸气过热度降低。
现有技术中为了提高压缩机的吸气过热度，通常将压缩机的排气口与回气口通过热气旁通电磁阀连通。当压缩机的吸气过热度降低时，打开热气旁通电磁阀以提高吸气过热度，然而这种方式直接降低了热回收多联机的能效。
发明内容
本发明旨在至少在一定程度上解决相关技术中的技术问题之一。
为此，本发明提出一种热回收多联机的室外机，所述室外机有利于压缩机获得吸气过热度，同时还可提高热回收多联机的能效。
本发明还提出一种热回收多联机，包括上述的热回收多联机的室外机。
根据本发明的热回收多联机的室外机，所述室外机具有第一接口和第二接口，所述室外机包括：压缩机，所述压缩机具有排气口和回气口；换向组件，所述换向组件具有第一阀口至第四阀口，所述第一阀口与所述排气口相连，所述第二阀口与所述回气口相连，所述第三阀口与所述第一接口相连；室外换热器，所述室外换热器的第一端与所述第四阀口相连，所述室外换热器的第二端与所述第二接口相连；多个单向阀，每个所述单向阀具有导通端和截止端，每个所述单向阀在从所述导通端到所述截止端的方向上单向导通，所述多个单向阀包括第一至第六单向阀，第一单向阀的导通端与所述第四阀口相连且所述第一单向阀的截止端与所述室外换热器的第一端相连，第二单向阀的导通端与所述第一接口相连且所述第二单向阀的截止端与所述第三阀口相连，第三单向阀的导通端连接至所述第二单向阀和所述第一接口之间且所述第三单向阀的截止端与所述室外换热器的第一端相连， 第四单向阀的导通端与所述室外换热器的第二端相连且所述第四单向阀的截止端与所述第二接口相连，第五单向阀的导通端连接至所述第二单向阀和所述第三阀口之间且所述第五单向阀的截止端连接至所述第四单向阀和所述第二接口之间，第六单向阀的导通端连接至所述第四单向阀和所述室外换热器之间且所述第六单向阀的截止端连接至所述第一单向阀和所述第四阀口之间；节流元件，所述节流元件串联在所述第三单向阀和所述室外换热器之间；气液分离器，所述气液分离器包括第二入口和气体出口，所述第二入口与所述第二阀口相连，所述气体出口与所述回气口相连。
根据本发明的热回收多联机的室外机，当热回收多联机处于制热模式时，冷媒流向切换装置中的节流元件全开，串联在第三单向阀和室外换热器之间的节流元件在冷媒流进室外换热器之前，对冷媒节流降压，这样的话可以抬高配管内两相冷媒的压力和减小干度，从而使较多的冷媒积存在配管内以减少气液分离器内的冷媒存储量，进而提高压缩机的吸气过热度，同时还可在一定程度上提高热回收多联机的能效。
根据本发明的一些实施例，所述室外换热器包括多个在上下方向下依次排列的第一换热通道，每个所述第一换热通道的第一端与所述第一单向阀之间串联有用于控制冷媒流通或截止的第一控制阀。
进一步地，热回收多联机的室外机还包括多个第七单向阀，所述多个第七单向阀与所述多个第一换热通道一一对应设置，每个所述第七单向阀的导通端与相应的所述第一换热通道的第二端相连且每个所述第七单向阀的截止端与所述第六单向阀相连。
进一步地，所述室外换热器还包括位于最下方的第二换热通道，所述第二换热通道的两端分别与所述排气口和所述第二接口相连，所述第二换热通道与所述排气口之间串联有用于控制冷媒流通或截止的第二控制阀。
进一步地，所述节流元件为电子膨胀阀。
根据本发明的一些实施例，热回收多联机的室外机还包括补气通道，所述补气通道的两端分别与所述排气口和所述第二接口相连，所述补气通道上串联有用于控制冷媒流通或截止的第三控制阀。
进一步地，所述第三控制阀为电磁阀。
根据本发明的一些实施例，热回收多联机的室外机还包括油分离器，所述油分离器包括第一入口、冷媒出口和油出口，所述第一入口与所述排气口相连，所述冷媒出口与所述第一阀口相连，所述油出口与所述回气口相连。
根据本发明的热回收多联机，包括上述的热回收多联机的室外机。
根据本发明的热回收多联机，通过设置上述的热回收多联机的室外机，可提高压缩机的吸气过热度，同时还有利于提高热回收多联机的能效。
附图说明
图1为根据本发明实施例的室外机的示意图。
附图标记：
室外机100；
第一接口11；第二接口12；
压缩机2；排气口a；回气口b；
换向组件3；第一阀口c；第二阀口d；第三阀口e；第四阀口f；
室外换热器4；第一换热通道41；第一控制阀411；第二换热通道42；第二控制阀421；
第一单向阀51；第二单向阀52；第三单向阀53；第四单向阀54；第五单向阀55；第六单向阀56；第七单向阀57；
节流元件6；
补气通道7；第三控制阀71；
油分离器8；第一入口g；冷媒出口h；油出口i；
气液分离器9；第二入口j；气体出口k。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接或彼此可通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于 本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
下面参考图1描述根据本发明实施例的热回收多联机的室外机100，其中室外机100具有第一接口11和第二接口12，室外机100通过第一接口11和第二接口12与冷媒流向切换装置和多个室内机共同装配组合成热回收多联机，以用于调节室内温度。
热回收多联机具有纯制冷模式、主制冷模式、主制热模式和纯制热模式，纯制冷模式指的是运行的室内机都进行制冷；纯制热模式指的是运行的室内机都进行制热；主制冷模式指的是一部分室内机进行制冷且一部分室内机进行制热，制冷负荷大于制热负荷，室外换热器4做冷凝器；主制热模式指的是一部分室内机制热且一部分室内机制冷，制热负荷大于制冷负荷，室外换热器4做蒸发器。为了便于描述，本发明实施例中的制热模式包括主制热模式和纯制热模式，制冷模式包括主制冷模式和纯制冷模式。
根据本发明实施例的热回收多联机的室外机100，可以包括压缩机2、换向组件3、室外换热器4、多个单向阀、节流元件6和气液分离器9，其中，压缩机2具有排气口a和回气口b，需要进行说明的是，压缩机2的结构和工作原理等均为现有技术，这里就不详细描述。
换向组件3具有第一阀口c至第四阀口f，其中，第一阀口c与第三阀口e和第四阀口f中的其中一个连通，第二阀口d与第三阀口e和第四阀口f中的另一个连通，也就是说，当第一阀口c与第三阀口e连通时，第二阀口d则与第四阀口f连通，当第一阀口c与第四阀口f连通时，第二阀口d则与第三阀口e连通。优选地，换向组件3为四通阀，但是可以理解的是，换向组件3还可以形成为其他结构，只要具有第一至第四阀口c-f且具有换向功能即可。
第一阀口c与排气口a相连，第二阀口d与回气口b相连，第三阀口e与第一接口11相连，室外换热器4的第一端与第四阀口f相连，室外换热器4的第二端与第二接口12相连。可以理解的是，室外机100还可以包括用于将风导向室外换热器4的风机，以加快室外换热器4的换热效率。
每个单向阀具有导通端和截止端，每个单向阀在从导通端到截止端的方向上单向导通，也就是说，冷媒只能从导通端进入到单向阀内，并从单向阀的截止端流出，无法从截止端进入到单向阀内，从而使得单向阀起到单向导通的作用。
多个单向阀包括第一至第六单向阀51-56，第一单向阀51的导通端与第四阀口f相连且第一单向阀51的截止端与室外换热器4的第一端相连，由此，通过设置第一单向阀51，冷媒只能从第四阀口f流向室外换热器4的第一端，而不能从室外换热器4的第一端流向第四阀口f。
第二单向阀52的导通端与第一接口11相连且第二单向阀52的截止端与第三阀口e相 连，从而通过设有第二单向阀52，冷媒只能从第一接口11流向第三阀口e，而不能从第三阀口e流向第一接口11。
第三单向阀53的导通端连接至第二单向阀52和第一接口11之间且第三单向阀53的截止端与室外换热器4的第一端相连，从而通过设有第三单向阀53，冷媒只能从第一接口11流向室外换热器4的第一端，而不能从室外换热器4的第一端流向第一接口11。
第四单向阀54的导通端与室外换热器4的第二端相连且第四单向阀54的截止端与第二接口12相连，从而通过设有第四单向阀54，冷媒只能从室外换热器4的第二端流向第二接口12，而不能从第二接口12流向室外换热器4的第二端。
第五单向阀55的导通端连接至第二单向阀52和第三阀口e之间且第五单向阀55的截止端连接至第四单向阀54和第二接口12之间，从而通过设有第五单向阀55，冷媒只能从第三阀口e流向第二接口12，而不能从第二接口12流向第三阀口e。
第六单向阀56的导通端连接至第四单向阀54和室外换热器4之间且第六单向阀56的截止端连接至第一单向阀51和第四阀口f之间，从而通过设有第六单向阀56，冷媒只能从室外换热器4的第二端流向第四阀口f，而不能从第四阀口f流向室外换热器4的第二端。
气液分离器9包括第二入口j和气体出口k，第二入口j与第二阀口d相连，气体出口k与回气口b相连，由此通过在第二阀口d和压缩机2的回气口b之间设置气液分离器9，可使从第二阀口d排出的冷媒进入到气液分离器9中气液分离，且分离出来的气态冷媒可从气体出口k排入到压缩机2中，液态冷媒则存储在气液分离器9中，从而避免了压缩机2发生液击现象，提高室外机100的运行可靠性。
节流元件6串联在第三单向阀53和室外换热器4之间，当多联机处于制热模式时，冷媒流向切换装置内的节流元件全开，通过节流元件6在冷媒流进室外换热器4之前，对冷媒节流降压，这样的话可以抬高配管内的两相冷媒压力和减小干度，从而增加配管内的冷媒量，进而减少了气液分离器9内的冷媒存储量，提高了压缩机2的吸气过热度，同时还可提高热回收多联机的能效。
为了便于对室外机100的冷媒流向进行描述，下面将室外机100应用在热回收多联机中进行描述，其中室外机100具有两种模式：当热回收多联机处于纯制冷模式时，室外机100运行第一种模式。当热回收多联机处于纯制热模式时，室外机100运行第二种模式。当多个室内机同时进行制冷模式和制热模式时，室外机100根据系统判断，运行第一种模式或第二种模式。
第一种模式：换向组件3的第一阀口c与第四阀口f连通且第二阀口d与第三阀口e连通，热回收多联机的冷媒流向为：压缩机2——换向组件3的第一阀口c——换向组件3 的第四阀口f——第一单向阀51——室外换热器4——第四单向阀54——第二接口12——冷媒流向切换装置——室内机——第一接口11——第二单向阀52——换向组件3的第三阀口e——换向组件3的第二阀口d——压缩机2。
第二种模式：换向组件3的第一阀口c与第三阀口e连通且第二阀口d和第四阀口f连通，当热回收多联机为纯制热模式时，热回收多联机的冷媒流向为：压缩机2——换向组件3的第一阀口c——换向组件3的第三阀口e——第五单向阀55——第二接口12——冷媒流向切换装置——室内机——第一接口11——第三单向阀53——节流元件6——室外换热器4——第六单向阀56——换向组件3的第四阀口f——换向组件3的第二阀口d——压缩机2。
当热回收多联机为主制热模式时，室外机100排出的高温高压气态冷媒经过冷媒流向切换装置先去到制热室内机冷凝成高温高压的液态冷媒，然后分两路，一部分去制冷室内机蒸发，一部分在冷媒流向切换装置内节流，然后两路汇合，在返回到室外换热器4之前经节流元件6节流降压，再回到室外换热器4蒸发，然后再回到压缩机2。
同时如上述可知，当同时存在制冷和制热模式需求的室内机时，无论室外机100是第一种模式还是第二种模式，热回收多联机在主制冷模式时，室外机100都输出气液混合态的冷媒到冷媒流向切换装置中，由冷媒流向切换装置进行气液分离，过热气态冷媒进入制热室内机制热，过冷液态冷媒进入制冷室内机制冷。热回收多联机在纯制热模式或主制热模式时，从室外机100输出的冷媒为高温高压的气态冷媒。热回收多联机在纯制冷模式时，室外机100输出的是液态冷媒。第一至第六单向阀51-56不仅起到分隔流路的作用，还能确保室外机100的冷媒由第二接口12进入到冷媒流向切换装置中。
根据本发明实施例的热回收多联机的室外机100，当热回收多联机处于制热模式时，冷媒流向切换装置中的节流元件全开，串联在第三单向阀53和室外换热器4之间的节流元件6可以在冷媒流进室外换热器4之前，对冷媒节流降压，这样的话可以抬高配管内两相冷媒的压力和减小干度，从而使较多的冷媒积存在配管内以减少气液分离器9内的冷媒存储量，进而提高压缩机2的吸气过热度，同时还减少了压缩机的能耗，提高了热回收多联机的能效。
根据本发明的一些实施例，如图1所示，室外换热器4包括多个在上下方向下依次排列的第一换热通道41，每个第一换热通道41的第一端与第一单向阀51之间串联有用于控制冷媒流通或截止的第一控制阀411。也就是说，每个第一换热通道41的使用情况都是通过相应的第一控制阀411进行控制的，每个第一换热通道41之间互不相关，由此，可以通过控制多个第一控制阀411的开启情况，从而控制多个第一换热通道41的使用个数，进而调整室外换热器4的容积，并使室外换热器4配合压缩机2、风机和冷媒流向切换装置调 节第二接口12的冷媒状态，例如，多个第一换热通道41同时使用可以满足大能力需求，只使用一个第一换热通道41可以满足小能力需求。简言之，室外换热器4可以分块控制，可以满足不同的能力需求，使控制更为精确。可选地，每个第一控制阀411可以为电磁阀。
进一步地，室外机100还包括多个第七单向阀57，多个第七单向阀57与多个第一换热通道41一一对应设置，每个第七单向阀57的导通端与相应的第一换热通道41的第二端相连且每个第七单向阀57的截止端与第六单向阀56相连。也就是说，一个第一换热通道41对应一个第七单向阀57，冷媒只能从第七单向阀57的导通端进入到第七单向阀57内并从第七单向阀57的截止端流出，而不能从第七单向阀57的截止端流入第七单向阀57，通过设有第七单向阀57，冷媒只能从第一换热通道41流向第六单向阀56，而不能从第六单向阀56流向第一换热通道41，从而进一步保证了室外机100运行的可靠性。
在本发明的进一步实施例中，室外换热器4还包括位于最下方的第二换热通道42，第二换热通道42的两端分别与排气口a和第二接口12相连，第二换热通道42与排气口a之间串联有用于控制冷媒流通或截止的第二控制阀421。也就是说，当通过第二控制阀421控制冷媒的流通时，压缩机2中的冷媒可直接从排气口a排入到第二换热通道42中进行换热，换热后的冷媒从第二接口12排入到冷媒流向切换装置，因此在室外换热器4进行除霜时，高温高压的冷媒直接排入到第二换热通道42内，当室外换热器4化霜后的冷水下流时，室外换热器4的底部可被高温高压的冷媒加热，使得化霜后的液态水可以直接从位于室外换热器4下方的底盘的水孔漏出，而不会因结冰堵塞水孔而造成安全隐患。
可选地，节流元件6为电子膨胀阀，由于电子膨胀阀反应灵敏，而且具有一定的节能作用，因此使用电子膨胀阀不但可以满足使用需要，还可提高节流元件6的灵敏度，并在一定程度上降低能耗。当然，可以理解的是，节流元件6也可形成为其他结构，例如节流元件6可以是热力膨胀阀或串联的毛细管和控制阀。
根据本发明的一些实施例，室外机100还包括补气通道7，补气通道7的两端分别与排气口a和第二接口12相连，补气通道7上串联有用于控制冷媒流通或截止的第三控制阀71。
可选地，第三控制阀71为电磁阀，由于电磁阀结构简单，价格低廉，而且反应灵敏，因此，将第三控制阀71设置为电磁阀不但可以满足使用需要，还可在一定程度上降低成本，节省装配空间。但是可以理解的是，第三控制阀71可以不限于电磁阀，还可以为其他元件，只要能实现导通或截止冷媒即可。
当打开第三控制阀71时，从压缩机2的排气口a排出的冷媒可以直接流向第二接口12以排出室外机100。因此当室外机100运行第一种模式且热回收多联机的需求更小时，可以通过关闭第一控制阀411而全部关闭室外换热器4，此时从压缩机2的排气口a排出的 冷媒只通过第三控制阀71流向第二接口12，通过调节第三控制阀71的开度以满足更小能力需求。同时通过设有补气通道7，在室外机100运行第一种模式时，利用第三控制阀71的调节可以补充适当的气态冷媒到制热室内机。
在本发明的一些实施例中，热回收多联机的室外机100还包括油分离器8，油分离器8包括第一入口g、冷媒出口h和油出口i，第一入口g与排气口a相连，冷媒出口h与第一阀口c相连，油出口i与回气口b相连，因此通过在压缩机2和第一阀口c之间串联油分离器8，从排气口a排出的混合有润滑油的冷媒进入到油分离器8中进行分离，分离出来的润滑油通过油出口i和回气口b排回到压缩机2中，分离出来的冷媒从冷媒出口h排入换向组件3，进而可以将排出压缩机2的润滑油进行回收利用，避免压缩机2因缺油运行而发生故障，提高室外机100的运行可靠性。
根据本发明实施例的热回收多联机，通过设置上述的热回收多联机的室外机100，可提高压缩机2的吸气过热度，同时还有利于提高热回收多联机的能效。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (9)

  1. 一种热回收多联机的室外机，其特征在于，所述室外机具有第一接口和第二接口，所述室外机包括：
    压缩机，所述压缩机具有排气口和回气口；
    换向组件，所述换向组件具有第一阀口至第四阀口，所述第一阀口与所述排气口相连，所述第二阀口与所述回气口相连，所述第三阀口与所述第一接口相连；
    室外换热器，所述室外换热器的第一端与所述第四阀口相连，所述室外换热器的第二端与所述第二接口相连；
    多个单向阀，每个所述单向阀具有导通端和截止端，每个所述单向阀在从所述导通端到所述截止端的方向上单向导通，所述多个单向阀包括第一至第六单向阀，第一单向阀的导通端与所述第四阀口相连且所述第一单向阀的截止端与所述室外换热器的第一端相连，第二单向阀的导通端与所述第一接口相连且所述第二单向阀的截止端与所述第三阀口相连，第三单向阀的导通端连接至所述第二单向阀和所述第一接口之间且所述第三单向阀的截止端与所述室外换热器的第一端相连，第四单向阀的导通端与所述室外换热器的第二端相连且所述第四单向阀的截止端与所述第二接口相连，第五单向阀的导通端连接至所述第二单向阀和所述第三阀口之间且所述第五单向阀的截止端连接至所述第四单向阀和所述第二接口之间，第六单向阀的导通端连接至所述第四单向阀和所述室外换热器之间且所述第六单向阀的截止端连接至所述第一单向阀和所述第四阀口之间；
    节流元件，所述节流元件串联在所述第三单向阀和所述室外换热器之间；
    气液分离器，所述气液分离器包括第二入口和气体出口，所述第二入口与所述第二阀口相连，所述气体出口与所述回气口相连。
  2. 根据权利要求1所述的热回收多联机的室外机，其特征在于，所述室外换热器包括多个在上下方向下依次排列的第一换热通道，每个所述第一换热通道的第一端与所述第一单向阀之间串联有用于控制冷媒流通或截止的第一控制阀。
  3. 根据权利要求2所述的热回收多联机的室外机，其特征在于，还包括多个第七单向阀，所述多个第七单向阀与所述多个第一换热通道一一对应设置，每个所述第七单向阀的导通端与相应的所述第一换热通道的第二端相连且每个所述第七单向阀的截止端与所述第六单向阀相连。
  4. 根据权利要求2所述的热回收多联机的室外机，其特征在于，所述室外换热器还包括位于最下方的第二换热通道，所述第二换热通道的两端分别与所述排气口和所述第二接口相连，所述第二换热通道与所述排气口之间串联有用于控制冷媒流通或截止的第二控制 阀。
  5. 根据权利要求2所述的热回收多联机的室外机，其特征在于，所述节流元件为电子膨胀阀。
  6. 根据权利要求1-5中任一项所述的热回收多联机的室外机，其特征在于，还包括补气通道，所述补气通道的两端分别与所述排气口和所述第二接口相连，所述补气通道上串联有用于控制冷媒流通或截止的第三控制阀。
  7. 根据权利要求6所述的热回收多联机的室外机，其特征在于，所述第三控制阀为电磁阀。
  8. 根据权利要求1-7中任一项所述的热回收多联机的室外机，其特征在于，还包括油分离器，所述油分离器包括第一入口、冷媒出口和油出口，所述第一入口与所述排气口相连，所述冷媒出口与所述第一阀口相连，所述油出口与所述回气口相连。
  9. 一种热回收多联机，其特征在于，包括根据权利要求1-8中任一项所述的热回收多联机的室外机。
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