A kind of method for removing impurities in air conditioning system

Abstract

This application relates to the field of air-conditioning systems, in particular, to an air-conditioning system and its method for removing impurities. A filter with a large number of meshes and a high filtering effect is connected in parallel on the low-pressure side of the air-conditioning system, and a filter is installed before and after the filter. The second and third control valves are installed. After the air conditioning system is installed, forced cooling is performed. At this time, the air conditioning system enters the debugging mode. By closing the first control valve on one side of the low-pressure cut-off valve and opening the two sides of the parallel filter The second and third solenoid valves. At this time, when the refrigeration is running, the refrigerant will pass through the indoor unit from the high-pressure side along the installed pipeline, and then flow through the filter to the low-pressure cut-off valve. The filter will filter out impurities and then return to the compressor. After running to the preset time, close the second and third control valves connected in parallel and open the first control valve to ensure the normal operation of the air conditioning system without impurities and effectively prevent the air conditioning system from being blocked by dirt.

Description

technical field [0001] The present application relates to the field of air conditioning systems, and more particularly, to an air conditioning system and a method for removing impurities. Background technique [0002] When the existing air-conditioning system is installed, there will be welding slag, oxide skin and other impurities in the pipeline. During the operation of the air-conditioning system, it is easy to enter the compressor and cause the compressor to burn out or enter various valve bodies or capillaries, causing the system to be dirty. Blocking. The existing treatment method is that filters are installed before and after various valve bodies, capillary tubes and compressors, so as to filter impurities in the system and ensure the normal operation of the system. [0003] The existing air-conditioning system adopts the above-mentioned existing processing method and has the following problems: [0004] (1) Various filters are installed in the air-conditioning syst...

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Problems solved by technology

[0004] (1) Various filters are installed in the air conditioning system, resulting in excessive pressure loss in the system, reducing the cooling and heating capacity, and excessive impurities will also cause the filter to become dirty and blocked;

[0005] (2) Each valve body, capillary and compressor have different requirements for the mesh number of the filter. If the mesh number is too large, the system resistance will be large and the energy loss will be large. If the mesh number is too small, some fine impurities will easily flow in the system. prone to system damage

[0007] (1) During the installation process of the air-conditioning system, due to the poor sealing of the pipeline, foreign objects or large dust particles enter, resulting in debris in the system;

[0008] (2) During the installation of welding pipelines in the air-conditioning system, due to welding without nitrogen filling or insufficient nitrogen filling, it is easy to form oxide scales

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