Leakage detection method for central air conditioner copper tube

Abstract

The invention discloses a leakage detection method for a central air conditioner copper tube. A differential pressure airtight leakage detection instrument is employed, with a detection mode of double end symmetrical counteraction, one end of a detected copper tube is connected to a detected end of the airtight leakage detection instrument, one end of a low leakage qualified copper tube is connected to the standard end of the airtight leakage detection instrument, high-pressure nitrogen or compressed air is introduced into the air inlet of the differential pressure airtight leakage detection instrument, the other end of each of the detected copper tube and the standard copper tube is sealed through a plugging head, and the detection of gas filling, pressure releasing, balancing, testing and gas discharging processes of the detected copper tube and the standard copper tube is carried out through the airtight leakage detection instrument at the same time. The method gas the advantages of simplicity, rapidness, accurate and reliable data, visibility, and good stability, a test field is clean and easy to maintain, and the disadvantages of the waste of water, high test cost and an easily dirty test field environment in the traditional water detection process can be effectively reduced.

Description

Technical field [0001] The invention relates to the field of pipe leakage detection methods, in particular to a leakage detection method for central air-conditioning copper pipes. Background technique [0002] With the continuous development of the air-tight leak detector industry, the air-tight leak detector uses air as the test medium, low cost of use and low equipment cost, etc., which makes its use in daily leak detection continue to expand. However, central air-conditioning copper Due to the large volume of the tube, the general hole diameter is about 2.2cm, and the length varies from 4.5m to 6m. The required test pressure is 3000kPa. During the high-pressure inflation process, intense heat and pressure interaction changes occur. Copper tubes are good conductors of heat. During the pressure-holding and balancing process of the airtight leak detector after stopping the inflation of the copper tube, the pressure change in the tube is difficult to balance. Summary of the inven...

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Problems solved by technology

[0002] With the continuous development of the air-tight leak detector industry, the use of air-tight leak detectors in daily leak detection continues to expand due to the use of air as the test medium, low cost of use, and low equipment cost. Due to the large volume of the tube, the general aperture is about 2.2cm, and the length varies from 4.5m to 6m. The required test pressure is 3000kPa. During the high-pressure inflation process, there is a severe interaction between heat and pressure. During the process of maintaining the pressure balance of the air-tight leak detector after stopping the inflation of the copper pipe, the pressure change in the pipe is difficult to balance

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