Collecting pipe and processing method thereof

Abstract

The invention discloses a collecting pipe which comprises a main pipe with a branch pipe hole, and a branch pipe and, wherein the branch pipe is welded on the branch pipe hole of the main pipe, and the branch pipe hole has an outward branch pipe hole flanging. The invention also discloses a processing method of the collecting pipe, which comprises the following steps that: a pipe blank is manufactured into the main pipe with the branch pipe hole flanging through punching and edge rolling processes, and then the branch pipe is welded on the main pipe. The collecting pipe overcomes the defect that the opening of the branch pipe is blocked due to capillarity during welding, makes a refrigeration system uniformly and stably distribute liquid, reduces the occurrence probability of refrigeration system faults, and can effectively improve the heat exchange capacity of a heat exchanger so as to increase the overall efficacy.

Description

technical field [0001] The invention relates to the technical field of fluid distribution devices for air-conditioning and refrigeration systems, and more specifically, to a header and a processing method thereof. Background technique [0002] The header is often used in refrigeration systems with multiple refrigerant separation branches, and is the node where multiple refrigerants converge in parallel. According to the phase state of the internal fluid, it can also be divided into a liquid collector and a gas collector. At the inlet and outlet ends of the evaporator of the air conditioning system, header pipes are commonly used to realize the diversion and convergence of refrigerant. The air pipe is then sucked into the compressor of the air conditioner through the main circuit of the refrigeration system. On the condenser or capillary tube of a large cooling capacity air conditioning system, the liquid collecting pipe is also commonly used to realize the diversion and co...

AI Technical Summary

Problems solved by technology

At present, the current collecting pipe of this structure has the following defects: because the matching gap between the branch pipe hole of the collecting pipe and the outer diameter of the branch pipe is very small, when using the brazing process commonly used on refrigeration appliances to weld the branch pipe, it is necessary to melt the metal electrode into a liquid The gap between the branch pipe hole and the branch pipe is full

Even when the branch pipe is a capillary tube, it is easy to cause the entire branch pipe orifice to be completely blocked

Once the branch pipe opening of the collecting pipe is blocked, the branch refrigeration pipes of the condenser or evaporator will have uneven distribution, and the heat exchange capacity will be reduced, which will seriously affect the refrigeration efficiency and even cause the failure of the refrigeration system

On the other hand, the current header blank tube is difficult to locate accurately when the branch pipe is welded, and it is prone to left and right deflection, which reduces the product quality and prevents the welded header from being effectively assembled on each branch refrigeration pipeline.

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