Air conditioner compressor discharge pipe joint assembly and manufacturing method thereof

Abstract

The invention discloses a connector assembly of an exhaust pipe of an air-conditioner compressor. The connector assembly comprises an exhaust copper pipe and a steel flange. The exhaust copper pipe is fixedly connected with the steel flange through phosphorous-copper brazing. The steel flange comprises a steel flange body. A through hole used for penetrating through the exhaust copper pipe is formed in the steel flange body in the axial direction, and a conical surface is arranged on the portion, located on the large end face of the steel flange body, of the through hole. Copper-tin alloy layers are arranged on the conical surface and between the steel flange body and the exhaust copper pipe correspondingly. According to the connector assembly of the exhaust pipe of the air-conditioner compressor, the steel flange in the connector assembly of the exhaust pipe is fixed to the exhaust copper pipe after being coated with the copper-tin alloy layers so that hydrogen-shielding brazing can be conducted on the assembly through phosphorous-copper solder at a temperature not higher than the recrystallization temperature of the exhaust copper pipe, environmental friendliness is achieved, the consistency is good, no chemical cleaning procedure is needed, and the brazing strength and the airtightness can be effectively ensured; and the grain size of the copper pipe is smaller than or equal to 0.2 mm, and the service life greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of precision machinery manufacturing, and in particular relates to an air-conditioning compressor exhaust pipe joint assembly and a manufacturing method thereof. Background technique [0002] The discharge pipe joint is one of the most critical parts of the air conditioner compressor. It connects the high-temperature and high-pressure refrigerant compressed by the compressor to the copper pipe of the air conditioner through the discharge pipe joint, and sends the refrigerant to the evaporator to cool the environment. For this reason, the exhaust pipe joint should have the characteristics of high strength, vibration resistance, reliable airtightness and no leakage, etc., which requires that the weld filler metal has dense spreading and excellent metallurgical bonding, and there is no volatile element in the filler metal to ensure the strength of the weld seam And airtight performance, that is, the grain size ...

AI Technical Summary

Problems solved by technology

Since the automatic rotary flame brazing is a single-piece process, the production efficiency is low, and the brass solder needs to volatilize a large amount of steam during the brazing process, which not only affects the airtight performance of the brazing but also causes pollution, which is very harmful to the health of employees, and the flame After brazing, chemical cleaning must be carried out to remove residual flux, which not only pollutes the environment but also increases production costs, and the brazing temperature of brass solder is about 950°C, resulting in a large grain size of the copper tube at the brazing seam. The failure rate is also relatively high during use

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