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Treatment method and treatment device for oil plugging of air conditioning system, air conditioner

A technology of an air conditioning system and a processing method, which is applied in heating and ventilation control systems, heating and ventilation safety systems, and control inputs involving air characteristics, etc. Oil shortage of fluorine and other problems, to avoid capacity attenuation, improve user experience, and save costs

Active Publication Date: 2018-11-13
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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  • Treatment method and treatment device for oil plugging of air conditioning system, air conditioner
  • Treatment method and treatment device for oil plugging of air conditioning system, air conditioner
  • Treatment method and treatment device for oil plugging of air conditioning system, air conditioner

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Embodiment 1: According to the system pressure value at the preset position of the compressor of the air-conditioning system every first preset time, and then 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 plugging, Specifically, the pressure value can be detected by a pressure detection module arranged at the air outlet or air return port of the compressor of the air conditioning system, wherein, when the preset position is the air return port of the compressor, the value of the preset pressure value The range is -0.1 MPa to 0.1 MPa. When the preset position is the exhaust port of the compressor, the range of the preset pressure value is 0.5 MPa to 2 MPa.

Embodiment 2

[0058] Embodiment 2: by detecting the discharge pressure value at the discharge port of the compressor of the air-conditioning system and the return air pressure value at the return air port of the compressor respectively every first preset time, and then determine the discharge pressure value and the return air pressure value at the air return port of the compressor When the difference (preferably the absolute value) of the return air pressure value is less than or equal to the preset pressure value (for example, 0.1 atmospheric pressure, that is, 0.01 MPa), it is determined that the air conditioning system has oil plugging, specifically by setting the air conditioner The pressure detection module at the exhaust port and return port of the compressor of the system is used to detect the pressure value.

Embodiment 3

[0059] Embodiment 3: by detecting the discharge temperature value at the discharge port of the compressor of the air-conditioning system and the return air temperature value at the return air port of the compressor respectively at the first preset time, and then determine the difference between the discharge temperature value and the When the difference of 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 experienced oil blockage. The temperature detection module to detect the temperature value.

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Abstract

The invention provides a method and a device for treating oil choking of an air conditioning system and an air conditioner. A refrigerant used by the air conditioning system is a flammable refrigerant. The method comprises the steps of detecting whether the air conditioning system in a preset working state is in oil choking or not; recording a current state of a four-way valve of the air conditioning system when the air conditioning system is detected to be in oil choking; switching the four-way valve of the air conditioning system according to a preset period. According to the technical scheme, an oil choking problem can be timely and effectively solved, the air conditioning system is enabled to recover normal operation, a phenomenon that the air conditioning system is in ability attenuation because of oil choking can be avoided, and the service life of a compressor and the air conditioning system can be ensured; meanwhile, the using comfort of the air conditioning system is increased, and the user experience is promoted.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for treating oil plugging in an air conditioning system, a device for treating oil plugging in an air conditioning system, and an air conditioner. Background technique [0002] At present, in the field of air-conditioning and refrigeration technology, R410a refrigerant is mostly used to replace R22 refrigerant, and its advantages are obviously reflected in inverter air conditioners. However, due to the high GWP (Global Warming Potential) of R410a refrigerant, Under the background that the global warming effect is getting worse and countries around the world are paying more and more attention to addressing global climate change, it will be gradually eliminated. Therefore, at present, we are more focused on researching low-GWP refrigerants represented by R32 refrigerant and R290 refrigerant, especially for R290 refrigerant, which has almost no pollution. At the sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/84F24F11/38F24F11/61F24F11/64
CPCF24F11/30F24F11/62F24F11/64F24F11/83F24F11/84F24F2110/00F24F2140/12
Inventor 刘旭
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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