Air conditioning system and sundry removing method thereof

Abstract

The invention relates to the field of air conditioning systems, and specifically relates to an air conditioning system and a sundry removing method thereof. The low-pressure side of the air-conditioning system is connected with a filter which is large in mesh number and high in filtering effect in parallel, a second control valve and a third control valve are installed on the front portion and the rear portion of the filter, and after the air-conditioning system is installed, forced refrigeration is conducted, and at the moment, the air conditioning system enters a debugging mode. By closing a first control valve on one side of a low-pressure stop valve and opening a second electromagnetic valve and a third electromagnetic valve which are on the two sides of the filter and connected in parallel at the same time, during refrigeration operation, a refrigerant passes an indoor unit from the high-pressure side along an installed pipeline, then reaches the low-pressure stop valve and flows through the filter. The refrigerant returns to a compressor after sundries are removed through the filter. After the air conditioning system runs for preset time, the second control valve and the third control valve which are connected in parallel are closed, the first control valve is opened, it is guaranteed that the air conditioning system can normally run without sundries, and filth blockage of the air conditioning system is effectively prevented.

Description

technical field [0001] The present application relates to the field of air-conditioning systems, and more specifically, to an air-conditioning system and its method for removing impurities. Background technique [0002] When the existing air conditioning system is installed, there will be various impurities such as welding slag and scale in the pipeline, which will easily enter the compressor during the operation of the air conditioner, causing the compressor to burn out or entering various valve bodies or capillary tubes, resulting in dirty system. Blocking. The existing processing method is to install filters 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] Existing air-conditioning system adopts above-mentioned existing processing method to have the following problems: [0004] (1) Various filters are installed in the air conditioning system, resulting...

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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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