Air conditioning system, air conditioner and control method of air conditioner
A technology of an air conditioning system and a control method, which is applied in the directions of air conditioning systems, space heating and ventilation, heating and ventilation control systems, etc., can solve the problems of reduced heat exchange capacity of evaporators, incomplete evaporation of refrigerant flow, and reduced heat exchange efficiency.
Active Publication Date: 2020-06-02
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
When the air-conditioning system runs for a certain period of time, due to the low temperature of the evaporator, frost forms outside the heat exchange tube of the condenser, and the heat exchange capacity of the evaporator gradually decreases.
[0003] The existing air-conditioning system changes the direction of refrigerant flow by adding a four-way valve, but the air-conditioning system does not have refrigeration capacity when it is in reverse operation, which affects the cooling effect and reduces user comfort
Method used
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[0027] Example of air conditioning system
[0028] see figure 1 , figure 1 It is a structural schematic diagram of an embodiment of the air conditioning system of the present invention. The air conditioner provided by the present invention includes an air conditioning system, and the air conditioning system includes a compressor 1, a condenser 2, a first flow limiting device 31, a second flow limiting device 32, an evaporator 4, a pressure sensor 5, a one-way valve 6, an axial flow Fan 71 , centrifugal fan 72 , first nozzle 81 , second nozzle 82 , high pressure switch 83 and low pressure switch 84 . Wherein, the compressor 1 is a horizontal compressor, the first current limiting device 31 is a capillary tube or an electronic expansion valve, and the second current limiting device 32 is an electronic expansion valve.
[0029] The compressor 1, the first nozzle 81, the high pressure switch 83, the condenser 2, the first flow limiting device 31, the one-way valve 6, the evapor...
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The invention provides an air conditioning system, an air conditioner and a control method of the air conditioner. The air conditioning system involves a compressor, a condenser, a first current limiting device and an evaporator which are sequentially connected, and the air conditioning system further involves a second current limiting device and a pressure sensor; and the second current limitingdevice and the first current limiting device are connected in parallel between the condenser and the evaporator, and the pressure sensor is used for detecting internal pressure of the evaporator. Theair conditioner comprises the air conditioning system. The control method of the air conditioner comprises the steps of obtaining a real-time internal pressure value through the pressure sensor; and regulating and controlling the opening degree of the second current limiting device according to the real-time internal pressure value. When the system detects the real-time internal pressure value ofthe evaporator through the pressure sensor and judges that the real-time internal pressure of the evaporator is lower than a threshold value within a period of time, the system turns on the second flow limiting device to preset opening degree, at the moment, high-temperature and high-pressure refrigerants flow to the evaporator from the condenser, and the internal pressure and the temperature of the evaporator are gradually increased, so that defrosting is achieved, and meanwhile, it is guaranteed that the air conditioning system is still in a refrigeration state during defrosting treatment.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioning system, an air conditioner and a control method for the air conditioner. Background technique [0002] There is an air conditioning system in the existing air conditioner, and the air conditioning system includes a compressor, a condenser, an expansion valve and an evaporator connected in sequence. When the air conditioning system runs for a certain period of time, due to the low temperature of the evaporator, frost forms outside the heat exchange tube of the condenser, the heat exchange capacity of the evaporator gradually decreases, the fixed refrigerant flow rate cannot be completely evaporated, the heat exchange efficiency decreases, and the air conditioning effect decreases. [0003] The existing air conditioning system adds a four-way valve to change the flow direction of the refrigerant, but the air conditioning system does not have the cooling...
Claims
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IPC IPC(8): F24F5/00F24F11/43F24F11/64F24F11/65F24F11/84F24F11/88F24F140/12
CPCF24F5/001F24F11/43F24F11/64F24F11/65F24F11/84F24F11/88F24F2140/12
Inventor 张咏贺春辉朱旭张世航
Owner GREE ELECTRIC APPLIANCES INC