A method for installing a multi-connected air-conditioning system

Abstract

The invention discloses a mounting method for a multi-connected type air conditioning system, and relates to the technical field of air conditioning equipment mounting. The mounting method comprises the following steps: step I, mounting an indoor unit; step II, hoisting a secondary refrigerant tube; step III, hoisting a primary refrigerant tube; step IV, welding branch tubes: connecting related refrigerant tubes of each indoor unit to the branch tubes for connecting refrigerant tubes by braze-welding, connecting the primary refrigerant tube to a gas bottle in a sealing mode, and continuously introducing low-pressure nitrogen gas; step V, cleaning pipelines; step VI, mounting an outdoor unit; step VII, detecting and charging a refrigerant; and step VIII, operating, checking and accepting. All secondary refrigerant tubes of the indoor unit are firstly hoisted, the primary refrigerant tube is then hoisted, the primary refrigerant tube is braze-welded, and the related refrigerant tubes andthe connecting refrigerant tubes are finally braze-welded, so that low-pressure nitrogen gas can be continuously introduced in through the primary refrigerant tube, repeated stop and recovery are notneeded, welding efficiency is improved, and cleaning for inner parts of the pipelines is further guaranteed.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment installation, in particular to an installation method of a multi-connected air-conditioning system. Background technique [0002] The multi-connected air conditioning system is an open refrigerant system. One outdoor unit is equipped with multiple indoor units for use. According to the needs of the construction site, each indoor unit is installed on the top wall at different positions indoors, and the outdoor unit is installed outdoors. , all indoor units are connected to outdoor units through refrigerant pipes. Since there is only one outdoor unit, the outdoor unit is usually connected to a main refrigerant pipe to enter the room, and then connected to multiple indoor units after being divided by multiple auxiliary refrigerant pipes. , The branch pipe can connect each auxiliary refrigerant pipe with the main refrigerant pipe, so that the diversion effect is better. [0003] Th...

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Problems solved by technology

[0004] The above existing technical solutions have the following defects: Since the welding of the branch pipe and the refrigerant pipe requires a high-quality oxygen-free environment to reduce the generation of oxides, nitrogen gas needs to be introduced during the welding process, and the number of refrigerant pipes of the multi-connected air conditioner is relatively large. Many, complicated installation steps, it is necessary to transfer the nitrogen inlet position everywhere, resulting in the suspension and interruption of nitrogen gas inlet, low brazing efficiency, and the inside of the pipeline is easily polluted, resulting in pipeline blockage and affecting the installation quality

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