Off-location ultrasonic cleaning method of heat exchanger of aircraft air conditioning system

Abstract

The invention provides an off-location ultrasonic cleaning method of a heat exchanger of an aircraft air conditioning system. A cleaner is prepared from 10-20 parts of mandarin oil, 30-50 parts of sodium dodecyl sulfate, 10-20 parts of fatty alcohol-polyoxyethylene ether, 10-20 parts of alkyl polyglycoside, 10-20 parts of ethyl alcohol and 100 parts of deionized water. The cleaning method comprises steps as follows: the cleaner is injected into a cleaning tank, acid is added to regulate the pH value of the cleaner to 5, then, the to-be-descaled heat exchanger is placed in the cleaning tank and soaked with the cleaner for at least 24 h, meanwhile, the to-be-descaled heat exchanger is subjected to ultrasonic treatment and then is cleaned with clear water for 6-12 h until dirt on the surface of the heat exchanger is completely removed, and the whole cleaning process can be finished. Compared with a method adopting a common cleaner, the method has the advantages that the dirt on the surface of the heat exchanger of the aircraft air conditioning system at the same pollution level can be effectively removed within the same cleaning time, so that the heat exchange efficiency of the heat exchanger can be improved more greatly, and the degree of pressure drop of the heat exchanger is higher.

Description

technical field [0001] The invention belongs to the technical field of civil aviation, and in particular relates to an out-of-position ultrasonic cleaning method for a heat exchanger of an aircraft air-conditioning system. Background technique [0002] The normal operation of the aircraft air conditioning system is crucial to ensure the safety of the passengers traveling and the safe transportation of the equipment. It not only needs to provide a comfortable environment for the passengers, but also pressurizes the airtight cabin. The heat exchanger is an important component of the aircraft air conditioning system, and its performance is related to the reliability of the entire aircraft air conditioning system. Scaling on the heat dissipation surface of heat exchangers is a common problem in the operation of domestic civil aviation aircraft. Scaling will lead to a rapid decline in the performance of heat exchangers, which in turn will cause failures in aircraft air conditioni...

AI Technical Summary

Problems solved by technology

Therefore, the mechanical agitation or bubbling agitation methods currently used in the cleaning process are difficult to transfer the mechanical power to the parts to be cleaned inside the heat exchanger, and cannot drive the cleaning liquid to flow, and the disintegration effect of the scale is poor.

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