WO2019227911A1 - 室外机及空调系统 - Google Patents

室外机及空调系统 Download PDF

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Publication number
WO2019227911A1
WO2019227911A1 PCT/CN2018/122912 CN2018122912W WO2019227911A1 WO 2019227911 A1 WO2019227911 A1 WO 2019227911A1 CN 2018122912 W CN2018122912 W CN 2018122912W WO 2019227911 A1 WO2019227911 A1 WO 2019227911A1
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Prior art keywords
heat exchange
outdoor
outdoor heat
communication
outdoor unit
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PCT/CN2018/122912
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English (en)
French (fr)
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张仕强
武连发
焦华超
张明祥
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珠海格力电器股份有限公司
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Publication of WO2019227911A1 publication Critical patent/WO2019227911A1/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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles

Definitions

  • the present application relates to the technical field of air treatment equipment, in particular to an outdoor unit and an air conditioning system.
  • the condenser and the evaporator are interchanged at this time.
  • the indoor unit fan needs to be stopped.
  • the heating and defrosting is performed.
  • the indoor temperature fluctuates greatly and affects comfort.
  • an auxiliary heater electric heating
  • the auxiliary heating components have high energy consumption and low defrosting efficiency, and the electric heating components are often in an environment covered by frost and water, and their service life is limited.
  • an outdoor unit and an air-conditioning system with an increased defrosting effect are provided.
  • An outdoor unit includes a compressor, two outdoor heat exchange units, a liquid pipe, a high-pressure gas pipe, and a low-pressure gas pipe.
  • the high-pressure gas pipe is in communication with an exhaust port of the compressor, and the low-pressure gas pipe is in communication with the compressor.
  • one of the outdoor heat exchange units has a first state in which one end communicates with the high-pressure gas pipe and the other end communicates with the liquid pipe and has one end communicates with the low-pressure gas pipe and the other end communicates with the liquid pipe
  • the second state of communication the other outdoor heat exchange unit has a third state where one end communicates with the liquid pipe and the other end communicates with the high pressure gas pipe, and one end communicates with the liquid pipe and the other end communicates with the low pressure
  • the outdoor unit further includes a defrosting unit, one end of the defrosting unit is in communication with the high-pressure air pipe, and the other end is in communication with the low-pressure air pipe.
  • both of the outdoor heat exchange units are disposed above the defrosting unit.
  • the two outdoor heat exchange units are arranged up and down.
  • a first solenoid valve is provided between each of the outdoor heat exchange units and the high-pressure gas pipe, and a second solenoid valve is provided between the outdoor heat exchange unit and the low-pressure gas pipe.
  • a third solenoid valve is provided between the defrost unit and the low-pressure air pipe.
  • the outdoor unit further includes a gas-liquid separator, an inlet of the gas-liquid separator is in communication with the low-pressure gas pipe, and a gaseous outlet is in communication with a suction port of the compressor.
  • the outdoor unit further includes a refrigeration four-way valve, the D end of the refrigeration four-way valve is in communication with the exhaust port of the compressor, and the S end of the refrigeration four-way valve is in communication with the low-pressure air pipe,
  • the C terminal is in communication with the two outdoor heat exchange units, respectively.
  • the E end of the four-way refrigeration valve is in communication with the suction port of the compressor through a throttling device or the E end of the four-way refrigeration valve is closed.
  • the outdoor unit includes a heat exchanger, and the heat exchanger is divided into two parts, and the heat exchanger of each part forms one outdoor heat exchange unit.
  • An air conditioning system includes the outdoor unit described above.
  • the outdoor unit and air-conditioning system can use the defrosting pipeline to defrost the outdoor heat exchange unit by using the defrosting pipeline, avoid the installation of electric heaters and other devices for defrosting, and increase the service life of the outdoor unit.
  • two outdoor heat exchange units are provided, which can continuously heat one outdoor heat exchange unit while the outdoor unit is defrosting, and the other outdoor heat exchange unit performs defrosting, thereby achieving the purpose of all defrosting, and defrosting
  • the pipeline is set under the two outdoor heat exchangers, which not only defrosts the outdoor heat exchanger, but also removes the frost that is difficult to melt at the bottom of the heat exchanger, prolongs the frosting time in the next cycle, and improves indoor comfort.
  • FIG. 1 is a schematic structural diagram of an outdoor unit according to an embodiment of an outdoor unit and an air conditioning system provided by this application;
  • FIG. 1 is a schematic structural diagram of an outdoor unit according to an embodiment of an outdoor unit and an air conditioning system provided by this application;
  • FIG. 2 is a refrigerant flow diagram of a cooling state of an outdoor unit and an outdoor unit according to an embodiment of an air conditioning system provided by the present application;
  • FIG. 3 is a refrigerant flow diagram of an outdoor unit and an outdoor unit of an air-conditioning system according to an embodiment of the present application entering a first stage of defrosting;
  • FIG. 4 is a refrigerant flow diagram of an outdoor unit and an outdoor unit of an air-conditioning system according to an embodiment of the present application entering a second stage of defrosting;
  • FIG. 5 is a refrigerant flow diagram of an outdoor unit and an outdoor unit of an air conditioning system according to an embodiment of the present application entering a third stage of defrost;
  • FIG. 6 is a refrigerant flow diagram of a heating state of an outdoor unit and an outdoor unit according to an embodiment of the air conditioning system provided by this application;
  • the outdoor unit shown in FIG. 1 includes a compressor 1, two outdoor heat exchange units 2, a liquid pipe 3, a high-pressure gas pipe 4, and a low-pressure gas pipe 5.
  • the high-pressure gas pipe 4 is in communication with the exhaust port of the compressor 1.
  • the low-pressure gas pipe 5 is in communication with the suction port of the compressor 1, and one outdoor heat exchange unit 2 has a first state in which one end communicates with the high-pressure gas pipe 4 and the other end communicates with the liquid pipe 3 and There is a second state in which one end communicates with the low-pressure gas pipe 5 and the other end communicates with the liquid pipe 3; the other outdoor heat exchange unit 2 has one end communicated with the liquid pipe 3 and the other end communicates with the high-pressure gas pipe A third state where 4 is in communication and a fourth state where one end is in communication with the liquid pipe 3 and the other end is in communication with the low-pressure gas pipe 5.
  • the two outdoor heat exchange units 2 are in a first state and a third state, respectively, and the refrigerant is along the compressor 1, the high-pressure air pipe 4, the outdoor heat exchange unit 2,
  • the liquid pipe 3, the indoor unit, the low-pressure gas pipe 5, and the compressor 1 form a refrigeration cycle.
  • the two outdoor heat exchange units 2 are in a second state and a fourth state, respectively. 3.
  • Two outdoor heat exchange units 2, a low-pressure air pipe 5 and a compressor 1 form a heating cycle.
  • one of the outdoor heat exchange units 2 is in the first state and the other outdoor heat exchange unit 2 is in the fourth state or one of the outdoor heat exchange units 2 is in the second state and the other outdoor heat exchange unit 2 is in a third state, that is, one of the outdoor heat exchange units 2 is in a heating mode, and the other outdoor heat exchange unit 2 is in a defrosting mode, so that the defrosting is performed without stopping the heating mode, and the corresponding
  • the states of the two outdoor heat exchange units 2 are switched, and the outdoor heat exchange unit 2 that has not been defrosted is defrosted, and finally the purpose of defrosting is achieved.
  • the outdoor unit further includes a defrosting unit 6, one end of which is in communication with the high-pressure air pipe 4, and the other end is in communication with the low-pressure air pipe 5.
  • a defrosting unit 6 one end of which is in communication with the high-pressure air pipe 4, and the other end is in communication with the low-pressure air pipe 5.
  • the two outdoor heat exchange units 2 are disposed above the defrosting unit 6, and the hot air rises away, and the heat of the defrosting unit 6 is used to defrost the two outdoor heat exchange units 2, and
  • the frosting process of the outdoor unit is frosting from the lower part of the heat exchanger to the upper part of the heat exchanger. Therefore, the defrost unit 6 can remove the frost at the bottom of the heat exchanger to achieve the purpose of complete defrost. In addition, it can remove the frost that is difficult to melt at the bottom of the heat exchanger, extend the frosting time in the next cycle, and improve indoor comfort.
  • the two outdoor heat exchange units 2 are arranged up and down, so that the two outdoor heat exchange units 2 can fully receive the heat of the defrosting unit 6, preferably, because the degree of frost formation on the outdoor heat exchange unit 2 above is the lowest. Therefore, when defrosting, first defrost the outdoor heat exchange unit 2 above, which can achieve the fastest defrost purpose of the outdoor heat exchange unit 2 above, and prevent the frost from being changed outdoors after melting again. Frosting on the thermal unit 2 increases the defrosting efficiency.
  • Figure 3 is the refrigerant flow diagram of the first stage, and most of the refrigerant passes through in sequence.
  • a high-pressure air pipe, an indoor unit, a liquid pipe, an outdoor heat exchange unit, a low-pressure air pipe, and a compressor form a heating cycle.
  • Part of the refrigerant passes through the high-pressure air pipe, another outdoor heat exchange unit, liquid pipe, and outdoor heat exchange in the heating cycle.
  • the heat unit, the low-pressure air pipe and the compressor form a defrost cycle of the upper outdoor heat exchange unit; the remaining refrigerant passes through the high-pressure air pipe, the defrost unit, the low-pressure air pipe and the compressor to form a defrost cycle;
  • Figure 4 is the refrigerant flow diagram in the second stage. After the defrosting of the uppermost outdoor heat exchange unit is completed, it enters the second stage. The outdoor heat exchange unit in the heating cycle performs defrosting, and the other outdoor heat exchange unit enters the heating mode. At this time, the defrost unit continues to defrost;
  • Figure 5 is the refrigerant flow diagram in the third stage. After the defrost structure of the outdoor heat exchange unit in the middle, the third stage is entered. Both outdoor heat exchange units enter the heating mode and the defrost unit. Defrost continuously to remove the frost from the bottom of the outdoor unit.
  • first solenoid valve 7 is provided between each of the outdoor heat exchange units 2 and the high-pressure gas pipe 4
  • second solenoid valve 8 is provided between the low-pressure gas pipe 5 and the first solenoid valve 7
  • the second solenoid valve 8 and the second solenoid valve 8 switch between the first state or the second state and the third state or the fourth state of the outdoor heat exchange unit 2.
  • a third electromagnetic valve 9 is provided between the defrost unit 6 and the low-pressure air pipe 5, and the third electromagnetic valve 9 is used to control the working state of the defrost unit 6.
  • the outdoor unit further includes a gas-liquid separator, an inlet of the gas-liquid separator is in communication with the low-pressure gas pipe 5, and a gaseous outlet is in communication with the suction port of the compressor 1.
  • the outdoor unit further includes a refrigeration four-way valve, the D end of the refrigeration four-way valve is in communication with the exhaust port of the compressor 1, and the S end of the refrigeration four-way valve is connected to the low-pressure air pipe 5 The two ends are in communication with the two outdoor heat exchange units 2 respectively.
  • the E end of the refrigeration four-way valve is communicated with the suction port of the compressor 1 through a throttling device or the E end of the refrigeration four-way valve is closed.
  • the outdoor unit includes a heat exchanger, and the heat exchanger is divided into two parts, and the heat exchanger of each part forms one outdoor heat exchange unit 2, that is, a heat exchanger is divided into two by pipes. Outdoor heat exchange unit 2 to facilitate defrosting of the heat exchanger.
  • An air conditioning system includes the outdoor unit described above.

Abstract

一种室外机及空调系统，包括压缩机（1）、两个室外换热单元（2）、液管（3）、高压气管（4）和低压气管（5），所述高压气管（4）与所述压缩机（1）的排气口连通，所述低压气管（5）与所述压缩机（1）的吸气口连通。通过设置除霜管路对室外换热单元（2）进行除霜，能够避免设置电加热器等装置进行除霜，增加室外机的使用寿命，而且设置两个室外换热单元（2），能够在室外机进行除霜时使一个室外换热单元（2）持续制热，另一室外换热单元（2）进行除霜，进而达到全部除霜的目的，而且将除霜管路设置在两个室外换热单元（2）的下方，不仅对室外换热单元（2）进行除霜，还能除去室外换热单元（2）底部难以融化的冰霜，延长下一周期的结霜时间，提高室内舒适性。

Description

室外机及空调系统
本申请要求于2018年5月29日提交中国专利局、申请号为201820866704.0、发明名称为“室外机及空调系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及空气处理设备技术领域，特别是一种室外机及空调系统。
背景技术
现有的空调系统在进入除霜状态时，此时冷凝器与蒸发器互换，为了避免室内吹冷风则室内机风机需要停机，在环境温度较低且湿度较大时，制热化霜时室内温度波动较大，影响舒适度，而现有技术中采用如在室外换热器上增加辅助加热器(电加热)，虽然此辅助电加热部件能够在不影响室温的情况下对室外换热器进行除霜，但是一般辅助加热部件的能耗高，除霜效率低，而且电加热部件会经常处于有霜、水覆盖的环境下，使用寿命有限。
发明内容
为了解决上述技术问题，而提供一种增加除霜效果的室外机及空调系统。
一种室外机，包括压缩机、两个室外换热单元、液管、高压气管和低压气管，所述高压气管与所述压缩机的排气口连通，所述低压气管与所述压缩机的吸气口连通，一个所述室外换热单元具有一端与所述高压气管连通且另一端与所述液管连通的第一状态和具有一端与所述低压气管连通且另一端与所述液管连通的第二状态，另一所述室外换热单元具有一端与所述液管连通且另一端与所述高压气管连通的第三状态和一端与所述液管连通且另一端与所述低压气管连通的第四状态。
进一步的，所述室外机还包括除霜单元，所述除霜单元一端与所述高压气管连通，另一端与所述低压气管连通。
进一步的，两个所述室外换热单元均设置于所述除霜单元的上方。
进一步的，两个所述室外换热单元上下设置。
进一步的，每一所述室外换热单元与所述高压气管之间设置有第一电磁阀，与所述低压气管之间设置有第二电磁阀。
进一步的，所述除霜单元与所述低压气管之间设置有第三电磁阀。
进一步的，所述室外机还包括气液分离器，所述气液分离器的入口与所述低压气管连通，气态出口与所述压缩机的吸气口连通。
进一步的，所述室外机还包括制冷四通阀，所述制冷四通阀的D端与所述压缩机的排气口连通，所述制冷四通阀的S端与所述低压气管连通，C端分别与两个所述室外换热单元连通。
进一步的，所述制冷四通阀的E端通过节流装置与所述压缩机的吸气口连通或所述制冷四通阀的E端封闭设置。
所述室外机包括换热器，所述换热器分为两部分，且每一部分的所述换热器形成一个所述室外换热单元。
一种空调系统，包括上述的室外机。
本申请提供的室外机及空调系统，通过设置除霜管路，能够利用除霜管路对室外换热单元进行除霜，能够避免设置电加热器等装置进行除霜，增加室外机的使用寿命，而且设置两个室外换热单元，能够在室外机进行除霜时使一个室外换热单元持续制热，另一室外换热单元进行除霜，进而达到全部除霜的目的，而且将除霜管路设置在两个室外换热器的下方，不仅对室外换热器进行除霜，还能除去换热器底部难以融化的冰霜，延长下一周期的结霜时间，提高室内舒适性。
附图说明
图1为本申请提供的室外机及空调系统的实施例的室外机的结构示意图；
图2为本申请提供的室外机及空调系统的实施例的室外机的制冷状态的冷媒流向图；
图3为本申请提供的室外机及空调系统的实施例的室外机进入除霜第一阶段的冷媒流向图；
图4为本申请提供的室外机及空调系统的实施例的室外机进入除 霜第二阶段的冷媒流向图；
图5为本申请提供的室外机及空调系统的实施例的室外机进入除霜第三阶段的冷媒流向图；
图6为本申请提供的室外机及空调系统的实施例的室外机的制热状态的冷媒流向图；
图中：
1、压缩机；2、室外换热单元；3、液管；4、高压气管；5、低压气管；6、除霜单元；7、第一电磁阀；8、第二电磁阀；9、第三电磁阀。
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所示的室外机，包括压缩机1、两个室外换热单元2、液管3、高压气管4和低压气管5，所述高压气管4与所述压缩机1的排气口连通，所述低压气管5与所述压缩机1的吸气口连通，一个所述室外换热单元2具有一端与所述高压气管4连通且另一端与所述液管3连通的第一状态和具有一端与所述低压气管5连通且另一端与所述液管3连通的第二状态，另一所述室外换热单元2具有一端与所述液管3连通且另一端与所述高压气管4连通的第三状态和一端与所述液管3连通且另一端与所述低压气管5连通的第四状态。
如图2所示的在室外机进行正常制冷模式时，两个所述室外换热单元2分别处于第一状态和第三状态，冷媒沿压缩机1、高压气管4、室外换热单元2、液管3、室内机、低压气管5和压缩机1形成制冷循环。
如图6所示的在室外机进行正常制热模式时，两个所述室外换热单元2分别处于第二状态和第四状态，冷媒沿压缩机1、高压气管4、室内机、液管3、两个室外换热单元2、低压气管5和压缩机1形成制热循环。
在室外机进行除霜模式时，其中一个室外换热单元2处于第一状态且另一室外换热单元2处于第四状态或一个室外换热单元2处于第二状态且另一室外换热单元2处于第三状态，也即其中一个室外换热单元2 处于制热模式，另一室外换热单元2进行除霜模式，从而在不停止制热模式的情况下进行除霜，并在对应的换热器除霜结束后，两个室外换热单元2的状态均进行切换，对未除霜的室外换热单元2进行除霜，最终达到除霜目的。
进一步的，所述室外机还包括除霜单元6，所述除霜单元6一端与所述高压气管4连通，另一端与所述低压气管5连通，在室外机进行除霜模式时，能够将高温高压的冷媒送至除霜单元6内，对两个室外换热单元2及其周边结构或环境进行加热，进而达到除霜的目的。
进一步的，两个所述室外换热单元2均设置于所述除霜单元6的上方，利用热气上升远离，利用除霜单元6的热量对两个室外换热单元2进行除霜，而且在室外机结霜过程均是由换热器的下部向换热器的上部进行结霜，因此，除霜单元6能够将换热器的最下方的霜进行去除，从而达到彻底除霜的目的，而且还能够除去换热器底部难以融化的冰霜，延长下一周期的结霜时间，提高室内舒适性。
进一步的，两个所述室外换热单元2上下设置，使两个室外换热单元2能够充分接受除霜单元6的热量，优选的，因为处于上方的室外换热单元2的结霜程度最低，因此在除霜时，先对处于上方的室外换热单元2进行除霜，能够最快速度的实现上方室外换热单元2进行除霜的目的，而且能够防止霜在融化后再次在室外换热单元2上结霜，从而增加除霜效率。
因此，在室外机进行除霜模式时，可以分为三个阶段，第一阶段是对最上层的室外换热单元进行除霜：图3为第一阶段的冷媒流向图，大部分冷媒依次经过高压气管、室内机、液管、一个室外换热单元、低压气管和压缩机形成制热循环，部分冷媒依次经过高压气管、另一室外换热单元、液管、处于制热循环中的室外换热单元、低压气管和压缩机形成上层室外换热单元的除霜循环；剩余的冷媒依次经过高压气管、除霜单元、低压气管和压缩机形成除霜单元除霜循环；
第二阶段，对处于中部的室外换热单元进行除霜：图4为第二阶段的冷媒流向图，在最上层的室外换热单元除霜结束后，进入第二阶段，在第一阶段中处于制热循环中的室外换热单元进行除霜，另一室外换热单元进入制热模式，此时除霜单元继续除霜；
第三阶段，持续除霜：图5为第三阶段的冷媒流向图，在中部的室外换热单元除霜结构后进入第三阶段，两个室外换热单元均进入制热模式，除霜单元持续进行除霜，将室外机底部的结霜去除。
进一步的，每一所述室外换热单元2与所述高压气管4之间设置有第一电磁阀7，与所述低压气管5之间设置有第二电磁阀8，利用第一电磁阀7和第二电磁阀8实现室外换热单元2的第一状态或第二状态以及第三状态或第四状态的切换。
进一步的，所述除霜单元6与所述低压气管5之间设置有第三电磁阀9，利用第三电磁阀9控制除霜单元6的工作状态。
进一步的，所述室外机还包括气液分离器，所述气液分离器的入口与所述低压气管5连通，气态出口与所述压缩机1的吸气口连通。
进一步的，所述室外机还包括制冷四通阀，所述制冷四通阀的D端与所述压缩机1的排气口连通，所述制冷四通阀的S端与所述低压气管5连通，C端分别与两个所述室外换热单元2连通。
进一步的，所述制冷四通阀的E端通过节流装置与所述压缩机1的吸气口连通或所述制冷四通阀的E端封闭设置。
所述室外机包括换热器，所述换热器分为两部分，且每一部分的所述换热器形成一个所述室外换热单元2，也即将一个换热器利用管路区分为两个室外换热单元2，从而方便对换热器的除霜。
一种空调系统，包括上述的室外机。
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 (11)

  1. 一种室外机，其特征在于：包括压缩机(1)、两个室外换热单元(2)、液管(3)、高压气管(4)和低压气管(5)，所述高压气管(4)与所述压缩机(1)的排气口连通，所述低压气管(5)与所述压缩机(1)的吸气口连通，一个所述室外换热单元(2)具有一端与所述高压气管(4)连通且另一端与所述液管(3)连通的第一状态和具有一端与所述低压气管(5)连通且另一端与所述液管(3)连通的第二状态，另一所述室外换热单元(2)具有一端与所述液管(3)连通且另一端与所述高压气管(4)连通的第三状态和一端与所述液管(3)连通且另一端与所述低压气管(5)连通的第四状态。
  2. 根据权利要求1所述的室外机，其特征在于：所述室外机还包括除霜单元(6)，所述除霜单元(6)一端与所述高压气管(4)连通，另一端与所述低压气管(5)连通。
  3. 根据权利要求2所述的室外机，其特征在于：两个所述室外换热单元(2)均设置于所述除霜单元(6)的上方。
  4. 根据权利要求3所述的室外机，其特征在于：两个所述室外换热单元(2)上下设置。
  5. 根据权利要求2所述的室外机，其特征在于：每一所述室外换热单元(2)与所述高压气管(4)之间设置有第一电磁阀(7)，与所述低压气管(5)之间设置有第二电磁阀(8)。
  6. 根据权利要求5所述的室外机，其特征在于：所述除霜单元(6)与所述低压气管(5)之间设置有第三电磁阀(9)。
  7. 根据权利要求2所述的室外机，其特征在于：所述室外机还包括气液分离器，所述气液分离器的入口与所述低压气管(5)连通，气态出口与所述压缩机(1)的吸气口连通。
  8. 根据权利要求2所述的室外机，其特征在于：所述室外机还包括制冷四通阀，所述制冷四通阀的D端与所述压缩机(1)的排气口连通，所述制冷四通阀的S端与所述低压气管(5)连通，C端分别与两个所述室外换热单元(2)连通。
  9. 根据权利要求8所述的室外机，其特征在于：所述制冷四通阀的E端通过节流装置与所述压缩机(1)的吸气口连通或所述制冷四通阀的E端封闭设置。
  10. 根据权利要求1所述的室外机，其特征在于：所述室外机包括换热器，所述换热器分为两部分，且每一部分的所述换热器形成一个所述室外换热单元(2)。
  11. 一种空调系统，其特征在于：包括权利要求1至10中任一项所述的室外机。
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