Air conditioning system, and processing method and device for oil blockage of air conditioning system

Abstract

The invention provides an air conditioning system, and a processing method and device for oil blockage of the air conditioning system. Refrigerants used by the air conditioning system are flammable refrigerants. The processing method used for the air conditioning system includes the steps that when the situation that the air conditioning system in a preset work state has an oil blockage problem is detected, a first flow guide passage and / or a second flow guide passage are / is opened; the first operation time that the first flow guide passage and / or a second flow guide passage are / is opened and in the work state is measured; and when the first operation time reaches first preset time, whether the air conditioning system has the oil blockage problem or not is detected, and corresponding measures are taken according to the detection result. By means of the technical scheme, the oil blockage problem can be effectively solved in time, the air conditioning system is made to recover normal operation, then the capability attenuation phenomenon of the air conditioning system caused by oil blockage is avoided, the service life of a press and the air conditioning system is guaranteed, and meanwhile the use comfort of the air conditioning system is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioning system, a method for treating oil plugs in the air conditioning system, and a device for treating oil plugs in the air conditioning system. Background technique [0002] At present, in the field of air-conditioning and refrigeration technology, most of the R410a refrigerants are used to replace R22 refrigerants, and its advantages are obviously reflected in inverter air conditioners. The global greenhouse effect is becoming more and more serious, and countries around the world are paying more and more attention to global climate change, and 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 same time, the research and development of corresponding compressors is also in pro...

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

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