WO2019134509A1 - 室外机、空调系统及控制方法 - Google Patents

室外机、空调系统及控制方法 Download PDF

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Publication number
WO2019134509A1
WO2019134509A1 PCT/CN2018/121879 CN2018121879W WO2019134509A1 WO 2019134509 A1 WO2019134509 A1 WO 2019134509A1 CN 2018121879 W CN2018121879 W CN 2018121879W WO 2019134509 A1 WO2019134509 A1 WO 2019134509A1
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WIPO (PCT)
Prior art keywords
compressor
heat exchanger
communication
valve
outdoor unit
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PCT/CN2018/121879
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English (en)
French (fr)
Inventor
曹朋
李立民
冯涛
张仕强
武连发
金孟孟
朱世强
黄文豪
周潮
李华杰
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珠海格力电器股份有限公司
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Publication of WO2019134509A1 publication Critical patent/WO2019134509A1/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
    • 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
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/021—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit
    • F25B2313/0211—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit the auxiliary heat exchanger being only used during defrosting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles

Definitions

  • the present application relates to the technical field of air conditioners, and in particular to an outdoor unit, an air conditioner system and a control method.
  • an outdoor unit an air conditioning system, and a control method for non-stop defrosting are provided.
  • An outdoor unit comprising a first connecting pipe and a second connecting pipe communicating with an indoor unit, further comprising a compressor, two heat exchangers, two reversing valves and two throttling devices, one of the heat exchangers Communicating with one of the reversing valves, and each of the reversing valves has a first position for communicating the heat exchanger with an exhaust port of the compressor and is the heat exchanger and the compression a second position in which the suction port of the machine is connected, and one end of each of the heat exchangers away from the reversing valve is respectively communicated with the first connecting pipe through one of the throttling devices, and the second connecting pipe is far away
  • Two solenoid valves are disposed in parallel at one end of the indoor unit, and one of the solenoid valves is in communication with an intake port of the compressor, and the other of the solenoid valves is in communication with an exhaust port of the compressor.
  • the reversing valve is a four-way valve, the first communication port of the four-way valve is in communication with the exhaust port of the compressor, the second communication port is in communication with the corresponding heat exchanger, and the third communication port is The air inlet of the compressor is connected, the fourth communication port is closed, and when the four-way valve is in the first position, the first communication port is in communication with the second communication port, the four-way The second communication port is in communication with the third communication port when the valve is in the second position.
  • the reversing valve is a three-way valve, the first communication port of the three-way valve is in communication with the exhaust port of the compressor, the second communication port is in communication with the corresponding heat exchanger, and the third communication port is The suction port of the compressor is in communication, and when the three-way valve is in the first position, the first communication port is in communication with the second communication port, and the three-way valve is in the second position The second communication port is in communication with the third communication port.
  • the two solenoid valves are respectively a heating solenoid valve and a cooling solenoid valve, one end of the heating solenoid valve is in communication with the second connecting pipe, and the other end is in communication with an exhaust port of the compressor, the cooling One end of the solenoid valve is in communication with the second connecting pipe, and the other end is in communication with an intake port of the compressor.
  • the outdoor unit further includes an oil separator, an inlet port of the oil separator is in communication with an exhaust port of the compressor, an oil outlet is connected to a return port of the compressor, and an air outlet and the first port
  • the two communicating tubes and/or the reversing valve are in communication.
  • the outdoor unit further includes a gas-liquid separator, the air inlet of the gas-liquid separator is in communication with the second connecting pipe and/or the switching valve, and the air outlet and the suction port of the compressor Connected.
  • the first connecting pipe is provided with a first electromagnetic valve
  • the second connecting pipe is provided with a second electromagnetic valve
  • the two heat exchangers include a first heat exchanger and a second heat exchanger, and the first heat exchanger is disposed above the second heat exchanger.
  • the two reversing valves include a first reversing valve and a second reversing valve
  • the two throttling devices include a first throttling device and a second throttling device
  • the first reversing valve and the The first throttling device is disposed in series with the first heat exchanger
  • the second diverting valve and the second throttling device are disposed in series with the second heat exchanger.
  • An air conditioning system includes an indoor unit and an outdoor unit, wherein the outdoor unit is the outdoor unit, and the outdoor unit communicates with the indoor unit through the first connecting pipe and the second connecting pipe to form a refrigerant circulation aisle.
  • the indoor unit includes a third throttle device, and the third throttle device is in communication with the first connecting pipe.
  • a method for controlling the above outdoor unit or the above air conditioning system comprising:
  • both of the reversing valves are in the first position, the heating solenoid valve is closed, the refrigerating solenoid valve is opened, and the refrigerant discharged from the compressor passes through the first heat exchanger and the second heat exchange respectively And then flow to the indoor unit for cooling;
  • the two reversing valves are both in the second position, the refrigerating solenoid valve is closed, the heating solenoid valve is opened, and the refrigerant discharged from the compressor passes through the indoor mechanism heat and then passes through the first The heat exchanger and the second heat exchanger are returned to the compressor;
  • the first reversing valve is in a second position, the second reversing valve is in a first position, the heating solenoid valve is open, the refrigerating solenoid valve is closed, The refrigerant discharged from the compressor is respectively heated by the indoor unit and the first heat exchanger, and is returned to the compressor through the second heat exchanger;
  • the second directional control valve is in a second position
  • the first directional control valve is in a first position
  • the heating solenoid valve is open
  • the refrigeration solenoid valve is closed
  • the refrigerant discharged from the compressor is separately heated by the indoor unit and the second heat exchanger, and is returned to the compressor through the first heat exchanger.
  • the second reversing valve In the low temperature cooling mode, when the outdoor environment is lower than the first set temperature, and the system low pressure is lower than the first set value, the second reversing valve is in the second position, the first reversing valve is in the first position, and the refrigerating solenoid valve is opened The second throttle device and the heating solenoid valve are closed, and the refrigerant discharged from the compressor is sequentially returned to the compressor through the first reversing valve, the first heat exchanger and the indoor unit;
  • the second reversing valve when the outdoor environment is higher than the first set temperature, and the system low pressure is higher than the second set value, the second reversing valve is in the second position, and the first reversing valve is in the first Position, the heating solenoid valve is opened, the second throttling device and the refrigerating solenoid valve are closed, and the refrigerant discharged from the compressor is sequentially returned to the compressor through the indoor unit, the first heat exchanger and the first reversing valve.
  • the first set temperature is 0 ° C
  • the first set value is -2 ° C
  • the second set temperature is 30 ° C
  • the second set value is 55 ° C.
  • both the first heat exchanger and the second heat exchanger detect the defrosting signal, enter the second heat exchanger defrosting mode, and after the defrosting of the second heat exchanger is completed, enter The first heat exchanger defrosting mode.
  • the outdoor unit, the air conditioning system and the control method provided by the present application by setting two heat exchangers, a part of the high-temperature refrigerant enters the internal machine when the outdoor unit of the air conditioner enters the defrosting process, and the internal machine does not stop when the external machine is defrosted. Heating, so as to ensure the unit's heat, maintain the indoor side of the air temperature and comfort, and in the case of high temperature heating or low temperature cooling, only use the first heat exchanger to work, properly adjust the system high and low pressure, better Guarantee unit reliability and comfort.
  • FIG. 1 is a schematic structural view of an air conditioner system of an outdoor unit, an air conditioning system, and a control method provided by the present application;
  • FIG. 2 is a refrigerant flow diagram of a cooling mode of an air conditioning system of an outdoor unit, an air conditioning system, and a control method according to the present application;
  • FIG. 3 is a refrigerant flow diagram of a heating mode of an air conditioner system of an outdoor unit, an air conditioning system, and a control method according to the present application;
  • FIG. 4 is a refrigerant flow diagram of a first heat exchanger defrosting mode of an air conditioner system of an outdoor unit, an air conditioning system, and a control method according to the present application;
  • FIG. 5 is a refrigerant flow diagram of a second heat exchanger defrosting mode of an air conditioner system of an outdoor unit, an air conditioning system, and a control method according to the present application;
  • FIG. 6 is a refrigerant flow diagram of a low-temperature cooling mode of an air-conditioning system of an outdoor unit, an air-conditioning system, and a control method according to the present application;
  • Fig. 7 is a refrigerant flow diagram of a high-temperature heating mode of an air-conditioning system of an outdoor unit, an air-conditioning system, and a control method according to the present application.
  • the outdoor unit shown in FIGS. 1 to 7 includes a first connecting pipe 1 and a second connecting pipe 2 that communicate with the indoor unit 101, and further includes a compressor 3, two heat exchangers 4, and two reversing valves 5 And two throttling devices 6, one of the heat exchangers 4 is in communication with one of the reversing valves 5, and each of the reversing valves 5 has a heat exchanger 4 and the compressor 3 a first position in which the exhaust port communicates and a second position in which the heat exchanger 4 communicates with the intake port of the compressor 3, and each end of the heat exchanger 4 away from the reversing valve 5 is respectively
  • the first connecting pipe 1 is communicated by one of the throttling devices 6, and the second connecting pipe 2 is disposed in parallel with one end of the indoor unit 101 with two electromagnetic valves 7, and one of the electromagnetic valves 7 and the
  • the suction port of the compressor 3 is in communication
  • the other solenoid valve 7 is in communication with the exhaust port of the compressor 3, the two heat exchangers
  • the reversing valve 5 is a four-way valve, the first communication port of the four-way valve is in communication with the exhaust port of the compressor 3, and the second communication port is in communication with the corresponding heat exchanger 4, and the third The communication port is in communication with the air inlet of the compressor 3, the fourth communication port is closed, and when the four-way valve is in the first position, the first communication port is in communication with the second communication port.
  • the second communication port is in communication with the third communication port
  • the fourth communication port of the four-way valve is sealed, so that when the four-way valve is in the first position
  • the third communication port is in communication with the fourth communication port, the third communication port cannot communicate with other structures to achieve the effect of closing the third communication port.
  • the first communication port It communicates with the fourth communication port to achieve the effect of closing the first communication port.
  • the reversing valve 5 is a three-way valve, the first communication port of the three-way valve is in communication with the exhaust port of the compressor 3, and the second communication port is in communication with the corresponding heat exchanger 4, and the third The communication port is in communication with the air inlet of the compressor 3, and when the three-way valve is in the first position, the first communication port is in communication with the second communication port, and the three-way valve is in the In the second position, the second communication port communicates with the third communication port, and the state in which the heat exchanger 4 communicates with the intake port or the exhaust port of the compressor 3 can be adjusted by the position where the three-way valve is located.
  • the two solenoid valves 7 are respectively a heating solenoid valve 71 and a refrigerating solenoid valve 72.
  • One end of the heating solenoid valve 71 is in communication with the second connecting pipe 2, and the other end is exhausted from the compressor 3.
  • One end of the cooling solenoid valve 72 is in communication with the second connecting pipe 2, and the other end is in communication with the intake port of the compressor 3, and the second connection is made through the cooling solenoid valve 72 and the heating solenoid valve 71.
  • the outdoor unit further includes an oil separator 8, an inlet port of the oil separator 8 is in communication with an exhaust port of the compressor 3, and an oil outlet is connected to a return port of the compressor 3, and an air outlet Communicating with the second communication tube and/or the reversing valve 5.
  • the outdoor unit further includes a gas-liquid separator 9, the air inlet of the gas-liquid separator 9 is in communication with the second connecting pipe 2 and/or the switching valve 5, the air outlet and the compressor The suction port of 3 is connected.
  • the first connecting pipe 1 is provided with a first electromagnetic valve 73
  • the second connecting pipe 2 is provided with a second electromagnetic valve 74.
  • the indoor unit can be connected. 101 or maintenance, the connection between the outdoor unit and the indoor unit 101 is completely disconnected, and when the outdoor unit in which the refrigerant is charged is moved, the first electromagnetic valve 73 and the second electromagnetic valve 74 are closed to prevent the refrigerant from leaking at the outdoor unit. .
  • the two heat exchangers 4 include a first heat exchanger 41 and a second heat exchanger 42, and the first heat exchanger 41 is disposed above the second heat exchanger 42.
  • the The outdoor unit includes a casing, and the first heat exchanger 41 and the second heat exchanger 42 and the compressor 3 are both disposed inside the casing, and the second heat exchanger 42 is disposed at the first Below the heat exchanger 41, in general, the lower heat exchanger 4 has a relatively thick frost and a large heat exchange effect.
  • the two reversing valves 5 include a first reversing valve 51 and a second reversing valve 52
  • the two throttling devices 6 include a first throttling device 61 and a second throttling device 62
  • the a reversing valve 51 and the first throttling device 61 are disposed in series with the first heat exchanger 41, the second reversing valve 52 and the second throttling device 62 and the second heat exchange
  • the units 42 are arranged in series.
  • An air conditioning system including an indoor unit 101 and an outdoor unit, the outdoor unit being the outdoor unit described above, and the outdoor unit passing through the first connecting pipe 1 and the second connecting pipe 2 and the indoor unit 101 Connected to form a refrigerant circulation channel.
  • the indoor unit 101 includes a third throttling device, and the third throttling device is in communication with the first connecting pipe, and the third throttling device is always in an automatic adjusting working state.
  • a method for controlling the above outdoor unit or the above air conditioning system comprising:
  • both of the switching valves 5 are in the first position, the heating solenoid valve 71 is closed, the cooling solenoid valve 72 is opened, and the refrigerant discharged from the compressor 3 passes through the first heat exchanger 41, respectively. And the second heat exchanger 42 is concurrently flowed into the indoor unit 101 for cooling;
  • both of the switching valves 5 are in the second position, the cooling solenoid valve 72 is closed, the heating solenoid valve 71 is opened, and the refrigerant discharged from the compressor 3 is passed through the indoor unit 101. After being heated, the first heat exchanger 41 and the second heat exchanger 42 are respectively returned to the compressor 3;
  • the first heat exchanger 41 is in a defrosting mode, the first reversing valve 51 is in the second position, the second reversing valve 52 is in the first position, the heating solenoid valve 71 is open, and the refrigerating solenoid valve is 72 is closed, the refrigerant discharged from the compressor 3 is respectively heated by the indoor unit 101 and the first heat exchanger 41, and flows back to the compressor 3 through the second heat exchanger 42;
  • the second heat exchanger 42 is in a defrosting mode, the second reversing valve 52 is in the second position, the first reversing valve 51 is in the first position, the heating solenoid valve 71 is open, and the refrigerating solenoid valve is 72, the refrigerant discharged from the compressor (3) is heated by the indoor unit (101) and the second heat exchanger (42), and flows back to the compressor (3) through the first heat exchanger (41).
  • the second reversing valve 52 In the low temperature cooling mode, when the outdoor environment is lower than the first set temperature, and the system low pressure is lower than the first set value, the second reversing valve 52 is in the second position, the first reversing valve 51 is in the first position, and the refrigerating electromagnetic
  • the valve 72 is opened, the second throttle device 62 and the heating solenoid valve 71 are closed, and the refrigerant discharged from the compressor 3 passes through the first switching valve 51, the first heat exchanger 41, and the indoor unit 101, and then flows back to the compressor.
  • this can reduce the absorption of cold from the outside, increase the temperature of the inlet pipe of the internal machine, and increase the low pressure of the system, so that the unit can reduce the anti-freeze protection;
  • the second reversing valve 52 In the high temperature heating mode, when the outdoor environment is higher than the first set temperature, and the system low pressure is higher than the second set value, the second reversing valve 52 is in the second position, and the first reversing valve 51 is at In the first position, the heating solenoid valve 71 is opened, the second throttle device 62 and the cooling solenoid valve 72 are closed, and the refrigerant discharged from the compressor 3 sequentially passes through the indoor unit 101, the first heat exchanger 41, and the first exchange.
  • the valve 51 is returned to the compressor 3, which can reduce the heat absorption from the outside, effectively reduce the system high pressure, and reduce the high pressure protection of the unit.
  • the first set temperature is 0 ° C
  • the first set value is -2 ° C
  • the second set temperature is 30 ° C
  • the second set value is 55 ° C.
  • both the first heat exchanger 41 and the second heat exchanger 42 detect the defrosting signal, because the second heat exchanger 42 is under the first heat exchanger 41, and usually, the lower heat exchange
  • the device 4 has a thick frost and a large heat exchange effect. Therefore, it preferentially enters the defrosting mode of the second heat exchanger 42 and enters the defrosting mode of the first heat exchanger 41 after the defrosting of the second heat exchanger 42 is completed.

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

Abstract

一种室外机、空调系统及控制方法，包括与室内机连通的第一连接管(1)和第二连接管(2)，还包括压缩机、两个换热器(4)、两个换向阀(5)和两个节流装置(6)，一个所述换热器(4)与一个所述换向阀(5)连通。室外机、空调系统及控制方法，通过设置两个换热器(4)，在空调室外机进入除霜过程中，一部分高温冷媒会进入室内机，实现外机化霜时室内机不停机持续制热，从而有力保证机组制热量，保持室内侧的出风温度与舒适性，而且在高温制热或低温制冷的情况下仅采用第一换热器(41)进行工作，适当调节系统高低压，更好的保证机组可靠性与舒适性。

Description

室外机、空调系统及控制方法
相关申请
本申请要求2018年01月02日申请的，申请号为201810002440.9，名称为“室外机、空调系统及控制方法”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及空调设备技术领域，特别是一种室外机、空调系统及控制方法。
背景技术
当前随着经济高速发展，多联机已经被广泛推广与使用，在医院、超市、体育场等大型场所随处可见，而在沿海地区，冬季气候潮湿，空气湿度较大，空调室外机处于这样潮湿的环境中，在制热运行中外机结霜频率很高，而化霜过程中为了不让内侧吹冷空气，内机将是停机状态，造成房间内制热效果大大降低。
发明内容
为了解决上述技术问题，而提供一种不停机化霜的室外机、空调系统及控制方法。
一种室外机，包括与室内机连通的第一连接管和第二连接管，还包括压缩机、两个换热器、两个换向阀和两个节流装置，一个所述换热器与一个所述换向阀连通，且每一所述换向阀均具有使所述换热器与所述压缩机的排气口连通的第一位置和是所述换热器与所述压缩机的吸气口连通的第二位置，每一所述换热器远离所述换向阀的一端分别通过一个所述节流装置与所述第一连接管连通，所述第二连接管远离室内机的一端并联设置有两个电磁阀，且一个所述电磁阀与所述压缩机的吸气口连通，另一所述电磁阀与所述压缩机的排气口连通。
所述换向阀为四通阀，所述四通阀的第一连通口与所述压缩机的排气口连通，第二连通口与对应的所述换热器连通，第三连通口与所述压缩机的吸气口连通，第四连通口封闭设置，且所述四通阀处于所述第一位置时，所述第一连通口与所述第二连通口连通，所述四通阀处于所述第二位置时，所述第二连通口与所述第三连通口连通。
所述换向阀为三通阀，所述三通阀的第一连通口与所述压缩机的排气口连通，第二连通口与对应的所述换热器连通，第三连通口与所述压缩机的吸气口连通，且所述三通阀处 于所述第一位置时，所述第一连通口与所述第二连通口连通，所述三通阀处于所述第二位置时，所述第二连通口与所述第三连通口连通。
两个所述电磁阀分别为制热电磁阀和制冷电磁阀，所述制热电磁阀的一端与所述第二连接管连通，另一端与所述压缩机的排气口连通，所述制冷电磁阀的一端与所述第二连接管连通，另一端与所述压缩机的吸气口连通。
所述室外机还包括油分离器，所述油分离器的进气口口与所述压缩机的排气口连通，油出口与所述压缩机的回油口连通，出气口与所述第二连通管和/或所述换向阀连通。
所述室外机还包括气液分离器，所述气液分离器的进气口与所述第二连接管连通和/或所述换向阀连通，出气口与所述压缩机的吸气口连通。
所述第一连接管上设置有第一电磁阀，所述第二连接管上设置有第二电磁阀。
两个所述换热器包括第一换热器和第二换热器，且所述第一换热器设置于所述第二换热器的上方。
两个所述换向阀包括第一换向阀和第二换向阀，两个所述节流装置包括第一节流装置和第二节流装置，且所述第一换向阀和所述第一节流装置与所述第一换热器串联设置，所述第二换向阀和所述第二节流装置与所述第二换热器串联设置。
一种空调系统，包括室内机和室外机，所述室外机为上述的室外机，且所述室外机通过所述第一连接管和所述第二连接管与所述室内机连通形成冷媒循环通道。
所述室内机内包括第三节流装置，所述第三节流装置与所述第一连接管连通。
一种上述的室外机或上述的空调系统的控制方法，包括：
制冷模式，两个所述换向阀均处于第一位置，所述制热电磁阀关闭，所述制冷电磁阀打开，所述压缩机排出的冷媒分别经过第一换热器和第二换热器后并流至所述室内机内进行制冷；
制热模式，两个所述换向阀均处于第二位置，所述制冷电磁阀关闭，所述制热电磁阀打开，所述压缩机排出的冷媒经过所述室内机制热后分别经过第一换热器和第二换热器回流至压缩机中；
第一换热器化霜模式，所述第一换向阀处于第二位置，所述第二换向阀处于第一位置，所述制热电磁阀打开，所述制冷电磁阀关闭，所述压缩机排出的冷媒分别经过室内机和第一换热器制热后并流，并经过所述第二换热器回流至压缩机中；
第二换热器化霜模式，所述第二换向阀处于第二位置，所述第一换向阀处于第一位置，所述制热电磁阀打开，所述制冷电磁阀关闭，所述压缩机排出的冷媒分别经过室内机和第二换热器制热后并流，并经过所述第一换热器回流至压缩机中。
还包括：
低温制冷模式，当室外环境低于第一设定温度，且系统低压低于第一设置值时，第二换向阀处于第二位置，第一换向阀处于第一位置，制冷电磁阀打开，第二节流装置和制热电磁阀关闭，所述压缩机排出的冷媒依次经过第一换向阀、第一换热器和室内机后回流至压缩机中；
高温制热模式，当室外环境高于第而设定温度，且系统低压高于第二设定值时，所述第二换向阀处于第二位置，所述第一换向阀处于第一位置，制热电磁阀打开，所述第二节流装置和制冷电磁阀关闭，所述压缩机排出的冷媒依次经过室内机、第一换热器和第一换向阀后回流至压缩机中。
所述第一设定温度为0℃，所述第一设定值为-2℃，所述第二设定温度为30℃，所述第二设定值为55℃。
若所述第一换热器和所述第二换热器均检测到化霜信号时，则进入第二换热器化霜模式，并在所述第二换热器化霜完成后，进入第一换热器化霜模式。
本申请提供的室外机、空调系统及控制方法，通过设置两个换热器，在空调室外机进入除霜过程中，一部分高温冷媒会进入内机，实现外机化霜时内机不停机持续制热，从而有力保证机组制热量，保持室内侧的出风温度与舒适性，而且在高温制热或低温制冷的情况下仅采用第一换热器进行工作，适当调节系统高低压，更好的保证机组可靠性与舒适性。
附图说明
以下将参照附图对根据本申请的室外机、空调系统及控制方法的实施方式进行描述。
图1为本申请提供的室外机、空调系统及控制方法的空调系统的结构示意图；
图2为本申请提供的室外机、空调系统及控制方法的空调系统制冷模式的冷媒流向图；
图3为本申请提供的室外机、空调系统及控制方法的空调系统的制热模式的冷媒流向图；
图4为本申请提供的室外机、空调系统及控制方法的空调系统的第一换热器化霜模式的冷媒流向图；
图5为本申请提供的室外机、空调系统及控制方法的空调系统的第二换热器化霜模式的冷媒流向图；
图6为本申请提供的室外机、空调系统及控制方法的空调系统的低温制冷模式的冷媒流向图；
图7为本申请提供的室外机、空调系统及控制方法的空调系统的高温制热模式的冷媒 流向图。
图中：
1、第一连接管；2、第二连接管；3、压缩机；4、换热器；5、换向阀；6、节流装置；101、室内机；7、电磁阀；71、制热电磁阀；72、制冷电磁阀；8、油分离器；9、气液分离器；73、第一电磁阀；74、第二电磁阀；41、第一换热器；42、第二换热器；51、第一换向阀；52、第二换向阀；61、第一节流装置；62、第二节流装置。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用于解释本申请，并不用于限定本申请。
如图1至图7所示的室外机，包括与室内机101连通的第一连接管1和第二连接管2，还包括压缩机3、两个换热器4、两个换向阀5和两个节流装置6，一个所述换热器4与一个所述换向阀5连通，且每一所述换向阀5均具有使所述换热器4与所述压缩机3的排气口连通的第一位置和是所述换热器4与所述压缩机3的吸气口连通的第二位置，每一所述换热器4远离所述换向阀5的一端分别通过一个所述节流装置6与所述第一连接管1连通，所述第二连接管2远离室内机101的一端并联设置有两个电磁阀7，且一个所述电磁阀7与所述压缩机3的吸气口连通，另一所述电磁阀7与所述压缩机3的排气口连通，两个所述换热器4并列设置，并且每一换热器4均通过一个换向阀5和一个节流装置6设置于压缩机3与第一连接管1之间，能够在室外机处于制冷模式或制热模式状态下通过换向阀5调节换热器4与压缩机3的吸气口或排气口连通，保证冷媒完整循环，通过节流装置6对其对应的换热器4的冷媒进行节流膨胀作用，通过设置两个电磁阀7，能够在室外机处于制冷模式或制热模式状态下调节第二连接管2与压缩机3的吸气口或排气口连通的状态。
所述换向阀5为四通阀，所述四通阀的第一连通口与所述压缩机3的排气口连通，第二连通口与对应的所述换热器4连通，第三连通口与所述压缩机3的吸气口连通，第四连通口封闭设置，且所述四通阀处于所述第一位置时，所述第一连通口与所述第二连通口连通，所述四通阀处于所述第二位置时，所述第二连通口与所述第三连通口连通，将四通阀的第四连通口密封设置，使得在四通阀处于第一位置时，所述第三连通口与所述第四连通口连通时无法与其他结构进行连通，达到关闭第三连通口的效果，同理，所述四通阀处于第二位置时，第一连通口与第四连通口连通，达到将第一连通口关闭的效果。
所述换向阀5为三通阀，所述三通阀的第一连通口与所述压缩机3的排气口连通，第二 连通口与对应的所述换热器4连通，第三连通口与所述压缩机3的吸气口连通，且所述三通阀处于所述第一位置时，所述第一连通口与所述第二连通口连通，所述三通阀处于所述第二位置时，所述第二连通口与所述第三连通口连通，利用三通阀处于的位置能够调节换热器4与压缩机3的吸气口或排气口连通的状态。
两个所述电磁阀7分别为制热电磁阀71和制冷电磁阀72，所述制热电磁阀71的一端与所述第二连接管2连通，另一端与所述压缩机3的排气口连通，所述制冷电磁阀72的一端与所述第二连接管2连通，另一端与所述压缩机3的吸气口连通，通过制冷电磁阀72和制热电磁阀71对第二连接管2与所述压缩机3的吸气口或排气口连通状态的调节。
所述室外机还包括油分离器8，所述油分离器8的进气口口与所述压缩机3的排气口连通，油出口与所述压缩机3的回油口连通，出气口与所述第二连通管和/或所述换向阀5连通。
所述室外机还包括气液分离器9，所述气液分离器9的进气口与所述第二连接管2连通和/或所述换向阀5连通，出气口与所述压缩机3的吸气口连通。
所述第一连接管1上设置有第一电磁阀73，所述第二连接管2上设置有第二电磁阀74，通过设置第一电磁阀73和第二电磁阀74能够在连接室内机101或维修时，将室外机与室内机101的连接完全断开，而且能够在移动注有冷媒的室外机时，将第一电磁阀73和第二电磁阀74关闭，防止冷媒泄露处室外机。
两个所述换热器4包括第一换热器41和第二换热器42，且所述第一换热器41设置于所述第二换热器42的上方，优选的，所述室外机包括外壳，所述第一换热器41和所述第二换热器42以及压缩机3均设置于所述外壳内部，而且将所述第二换热器42设置于所述第一换热器41下方，通常情况下，下部换热器4霜比较厚，换热影响大。
两个所述换向阀5包括第一换向阀51和第二换向阀52，两个所述节流装置6包括第一节流装置61和第二节流装置62，且所述第一换向阀51和所述第一节流装置61与所述第一换热器41串联设置，所述第二换向阀52和所述第二节流装置62与所述第二换热器42串联设置。
一种空调系统，包括室内机101和室外机，所述室外机为上述的室外机，且所述室外机通过所述第一连接管1和所述第二连接管2与所述室内机101连通形成冷媒循环通道。
所述室内机101内包括第三节流装置，所述第三节流装置与所述第一连接管连通，所述第三节流装置一直处于自动调节工作状态。
一种上述的室外机或上述的空调系统的控制方法，包括：
制冷模式，两个所述换向阀5均处于第一位置，所述制热电磁阀71关闭，所述制冷电磁阀72打开，所述压缩机3排出的冷媒分别经过第一换热器41和第二换热器42后并流至所述室内机101内进行制冷；
制热模式，两个所述换向阀5均处于第二位置，所述制冷电磁阀72关闭，所述制热电磁阀71打开，所述压缩机3排出的冷媒经过所述室内机101制热后分别经过第一换热器41和第二换热器42回流至压缩机3中；
第一换热器41化霜模式，所述第一换向阀51处于第二位置，所述第二换向阀52处于第一位置，所述制热电磁阀71打开，所述制冷电磁阀72关闭，所述压缩机3排出的冷媒分别经过室内机101和第一换热器41制热后并流，并经过所述第二换热器42回流至压缩机3中；
第二换热器42化霜模式，所述第二换向阀52处于第二位置，所述第一换向阀51处于第一位置，所述制热电磁阀71打开，所述制冷电磁阀72关闭，所述压缩机3排出的冷媒分别经过室内机101和第二换热器42制热后并流，并经过所述第一换热器41回流至压缩机3中。
还包括：
低温制冷模式，当室外环境低于第一设定温度，且系统低压低于第一设置值时，第二换向阀52处于第二位置，第一换向阀51处于第一位置，制冷电磁阀72打开，第二节流装置62和制热电磁阀71关闭，所述压缩机3排出的冷媒依次经过第一换向阀51、第一换热器41和室内机101后回流至压缩机3中，这样可以减少从外侧吸收冷量，提升内机进管温度，系统低压升高，使机组减少防冻结保护；
高温制热模式，当室外环境高于第而设定温度，且系统低压高于第二设定值时，所述第二换向阀52处于第二位置，所述第一换向阀51处于第一位置，制热电磁阀71打开，所述第二节流装置62和制冷电磁阀72关闭，所述压缩机3排出的冷媒依次经过室内机101、第一换热器41和第一换向阀51后回流至压缩机3中，这样可以减少从外侧吸收热量，有效地降低系统高压，使机组减少高压保护。
所述第一设定温度为0℃，所述第一设定值为-2℃，所述第二设定温度为30℃，所述第二设定值为55℃。
若所述第一换热器41和所述第二换热器42均检测到化霜信号时，因第二换热器42处于第一换热器41下方，而通常情况下，下部换热器4霜厚，换热影响大，因此，优先进入第二换热器42化霜模式，并在所述第二换热器42化霜完成后，进入第一换热器41化霜模式。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (15)

  1. 一种室外机，包括与室内机(101)连通的第一连接管(1)和第二连接管(2)，其特征在于：还包括压缩机(3)、两个换热器(4)、两个换向阀(5)和两个节流装置(6)，一个所述换热器(4)与一个所述换向阀(5)连通，且每一所述换向阀(5)均具有使所述换热器(4)与所述压缩机(3)的排气口连通的第一位置和使所述换热器(4)与所述压缩机(3)的吸气口连通的第二位置，每一所述换热器(4)远离所述换向阀(5)的一端分别通过一个所述节流装置(6)与所述第一连接管(1)连通，所述第二连接管(2)远离室内机(101)的一端并联设置有两个电磁阀(7)，且一个所述电磁阀(7)与所述压缩机(3)的吸气口连通，另一所述电磁阀(7)与所述压缩机(3)的排气口连通。
  2. 根据权利要求1所述的室外机，其特征在于：所述换向阀(5)为四通阀，所述四通阀的第一连通口与所述压缩机(3)的排气口连通，第二连通口与对应的所述换热器(4)连通，第三连通口与所述压缩机(3)的吸气口连通，第四连通口封闭设置，且所述四通阀处于所述第一位置时，所述第一连通口与所述第二连通口连通，所述四通阀处于所述第二位置时，所述第二连通口与所述第三连通口连通。
  3. 根据权利要求1所述的室外机，其特征在于：所述换向阀(5)为三通阀，所述三通阀的第一连通口与所述压缩机(3)的排气口连通，第二连通口与对应的所述换热器(4)连通，第三连通口与所述压缩机(3)的吸气口连通，且所述三通阀处于所述第一位置时，所述第一连通口与所述第二连通口连通，所述三通阀处于所述第二位置时，所述第二连通口与所述第三连通口连通。
  4. 根据权利要求1所述的室外机，其特征在于：两个所述电磁阀(7)分别为制热电磁阀(71)和制冷电磁阀(72)，所述制热电磁阀(71)的一端与所述第二连接管(2)连通，另一端与所述压缩机(3)的排气口连通，所述制冷电磁阀(72)的一端与所述第二连接管(2)连通，另一端与所述压缩机(3)的吸气口连通。
  5. 根据权利要求1所述的室外机，其特征在于：所述室外机还包括油分离器(8)，所述油分离器(8)的进气口口与所述压缩机(3)的排气口连通，油出口与所述压缩机(3)的回油口连通，出气口与所述第二连通管和/或所述换向阀(5)连通。
  6. 根据权利要求1所述的室外机，其特征在于：所述室外机还包括气液分离器(9)，所述气液分离器(9)的进气口与所述第二连接管(2)连通和/或所述换向阀(5)连通，出气口与所述压缩机(3)的吸气口连通。
  7. 根据权利要求1所述的室外机，其特征在于：所述第一连接管(1)上设置有第一电磁阀(73)，所述第二连接管(2)上设置有第二电磁阀(74)。
  8. 根据权利要求1所述的室外机，其特征在于：两个所述换热器(4)包括第一换热器(41)和第二换热器(42)，且所述第一换热器(41)设置于所述第二换热器(42)的上方。
  9. 根据权利要求8所述的室外机，其特征在于：两个所述换向阀(5)包括第一换向阀(51)和第二换向阀(52)，两个所述节流装置(6)包括第一节流装置(61)和第二节流装置(62)，且所述第一换向阀(51)和所述第一节流装置(61)与所述第一换热器(41)串联设置，所述第二换向阀(52)和所述第二节流装置(62)与所述第二换热器(42)串联设置。
  10. 一种空调系统，包括室内机(101)和室外机，其特征在于：所述室外机为权利要求1-9中任一项所述的室外机，且所述室外机通过所述第一连接管(1)和所述第二连接管(2)与所述室内机(101)连通形成冷媒循环通道。
  11. 根据权利要求10所述的空调系统，其特征在于：所述室内机(101)内包括第三节流装置，所述第三节流装置与所述第一连接管连通。
  12. 一种权利要求1-9中任一项所述的室外机或权利要求10或11所述的空调系统的控制方法，其特征在于：包括：
    制冷模式，两个所述换向阀(5)均处于第一位置，所述制热电磁阀(71)关闭，所述制冷电磁阀(72)打开，所述压缩机(3)排出的冷媒分别经过第一换热器(41)和第二换热器(42)后并流至所述室内机(101)内进行制冷；
    制热模式，两个所述换向阀(5)均处于第二位置，所述制冷电磁阀(72)关闭，所述制热电磁阀(71)打开，所述压缩机(3)排出的冷媒经过所述室内机(101)制热后分别经过第一换热器(41)和第二换热器(42)回流至压缩机(3)中；
    第一换热器(41)化霜模式，所述第一换向阀(51)处于第二位置，所述第二换向阀(52)处于第一位置，所述制热电磁阀(71)打开，所述制冷电磁阀(72)关闭，所述压缩机(3)排出的冷媒分别经过室内机(101)和第一换热器(41)制热后并流，并经过所述第二换热器(42)回流至压缩机(3)中；
    第二换热器(42)化霜模式，所述第二换向阀(52)处于第二位置，所述第一换向阀(51)处于第一位置，所述制热电磁阀(71)打开，所述制冷电磁阀(72)关闭，所述压缩机(3)排出的冷媒分别经过室内机(101)和第二换热器(42)制热后并流，并经过所述第一换热器(41)回流至压缩机(3)中。
  13. 根据权利要求11所述的控制方法，其特征在于：还包括：
    低温制冷模式，当室外环境低于第一设定温度，且系统低压低于第一设置值时，第二换向阀(52)处于第二位置，第一换向阀(51)处于第一位置，制冷电磁阀(72)打开，第二节流装置(62)和制热电磁阀(71)关闭，所述压缩机(3)排出的冷媒依次经过第一换向阀(51)、第一换热器(41)和室内机(101)后回流至压缩机(3)中；
    高温制热模式，当室外环境高于第而设定温度，且系统低压高于第二设定值时，所述第二换向阀(52)处于第二位置，所述第一换向阀(51)处于第一位置，制热电磁阀(71)打开，所述第二节流装置(62)和制冷电磁阀(72)关闭，所述压缩机(3)排出的冷媒依次经过室内机(101)、第一换热器(41)和第一换向阀(51)后回流至压缩机(3)中。
  14. 根据权利要求12所述的控制方法，其特征在于：所述第一设定温度为0℃，所述第一设定值为-2℃，所述第二设定温度为30℃，所述第二设定值为55℃。
  15. 根据权利要求11所述的控制方法，其特征在于：若所述第一换热器(41)和所述第二换热器(42)均检测到化霜信号时，则进入第二换热器(42)化霜模式，并在所述第二换热器(42)化霜完成后，进入第一换热器(41)化霜模式。
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