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Disposal method and disposal device for greasy blockage of air conditioner system and air conditioner

An air-conditioning system and processing method technology, applied in the direction of heating and ventilation control system, heating and ventilation safety system, control input related to air characteristics, etc., can solve the problem of reducing the service life of compressors and systems, reducing operating power, and lack of oil in the system Fluorine deficiency and other problems can be achieved to improve the comfort of use, ensure the service life and improve the user experience

Inactive Publication Date: 2016-04-06
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for the flammable refrigerant—R290 refrigerant, its viscosity will increase sharply at low temperatures, especially in cooling and heating inverters. The ultra-low temperature refrigerant and lubricating oil need to enter the condenser (outdoor heat exchanger) through a throttling device (such as an electronic expansion valve). At the same time, the amount of flammable refrigerant is less due to safety considerations, so the pressure of the air conditioning system is higher than that of R410a The pressure of the air-conditioning system of refrigerant and R32 refrigerant is much lower, which will cause oil with a relatively high viscosity to block the throttling device, resulting in the inability of flammable refrigerants to participate in the cycle, which will cause the compressor to run idly, the capacity and operating power will decrease, and the system will fail. The oil lacks fluorine, and the motor of the compressor overheats after long-term operation, which greatly reduces the service life of the compressor and the system, and affects the user experience. great influence

Method used

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  • Disposal method and disposal device for greasy blockage of air conditioner system and air conditioner
  • Disposal method and disposal device for greasy blockage of air conditioner system and air conditioner
  • Disposal method and disposal device for greasy blockage of air conditioner system and air conditioner

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Experimental program
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Effect test

Embodiment 1

[0057] Embodiment 1: By using the system pressure value at the preset position of the compressor of the air conditioning system every first preset time, when it is determined that the system pressure value is less than or equal to the preset pressure value, it is determined that the air conditioning system has oil clogging. Specifically, the pressure value can be detected by a pressure detection module provided at the exhaust port or the return port of the compressor of the air conditioning system, wherein when the preset position is the return port of the compressor, the value of the preset pressure value The range is -0.1 MPa ~ 0.1 MPa, when the preset position is the exhaust port of the compressor, the value range of the preset pressure value is 0.5 MPa ~ 2 MPa.

Embodiment 2

[0058] Embodiment 2: By separately detecting the exhaust pressure value at the exhaust port of the compressor of the air conditioning system and the return air pressure value at the return port of the compressor every first preset time, and then determine the exhaust pressure value and When the difference of the return air pressure value (preferably the absolute value) is less than or equal to the preset pressure value (for example, 0.1 atmosphere, that is, 0.01 MPa), it is determined that the air conditioning system has been blocked by oil. Specifically, it can be set in the air conditioner The pressure detection module at the discharge port and return port of the compressor of the system detects the pressure value.

Embodiment 3

[0059] Embodiment 3: The exhaust temperature value at the exhaust port of the compressor of the air conditioning system and the return air temperature value at the return port of the compressor are detected every first preset time, and then the exhaust temperature value is determined When the difference between the return air temperature value is less than or equal to the preset temperature value (for example, 40°C), it is determined that the air conditioning system has been blocked by oil. Specifically, it can be set at the exhaust port and the return air port of the compressor of the air conditioning system The temperature detection module to detect the temperature value.

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Abstract

The invention provides a disposal method for greasy blockage of an air conditioner system, a disposal device for greasy blockage of the air conditioner system, and an air conditioner, wherein a refrigerant used by the air conditioner system is a flammable refrigerant. The method comprises the following steps: when detecting that greasy blockage occurs to the air conditioner system in preset work state, recording the current opening of an electronic expansion valve; adjusting the opening of the electronic expansion valve to preset opening from the current opening, wherein the preset opening is greater than the current opening; counting the accumulated operation time of the electronic expansion valve working in the preset opening; and when the accumulated operation time reaches the preset time, detecting whether greasy blockage occurs to the air conditioner system, and performing corresponding disposal according to the detection result. By adopting the technical scheme, the problem of greasy blockage can be timely and effectively solved so that the air conditioner system can recover to normal operation, and therefore, the phenomenon of capability attenuation caused by greasy blockage of the air conditioner can be avoided, and the service life of a compressor and the air conditioner system can be ensured.

Description

Technical field [0001] The invention relates to the technical field of air conditioners, and in particular to a method for processing oil blockage in an air conditioning system, a device for processing oil blockage in an air conditioning system, and an air conditioner. Background technique [0002] At present, in the field of air conditioning and refrigeration technology, most of the R410a refrigerant is used to replace the R22 refrigerant. Its advantages are obviously reflected in the inverter air conditioner. However, due to the high GWP (Global Warming Potential) of the R410a refrigerant, the current The global greenhouse effect is becoming more and more serious, and countries all over the world are paying more and more attention to global climate change, and they will be gradually eliminated. Therefore, we are currently focusing more on research on low GWP refrigerants represented by R32 refrigerant and R290 refrigerant, especially for R290 refrigerant, which has almost no po...

Claims

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Application Information

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IPC IPC(8): F24F11/00F25B49/02
CPCF24F11/62F24F11/30F24F11/32F24F11/64F24F11/70F24F11/84F24F2110/00F25B49/02F25B2500/04
Inventor 刘旭
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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