Shell, manufacturing method and application of shell

Abstract

The invention relates to a shell, and a manufacturing method and the application of the shell. The shell refers to a liquid accumulator shell for a compressor, a muffler shell for an air conditioner, a gas-liquid separator shell for a central air conditioner or an oil-gas separator shell. The shell is formed by butt welding of at least two parts. A self-fluxing annular weld pass welding process of argon arc welding, plasma welding, positive ion welding, high frequency welding or laser welding is adopted to carry out synchronization self-fluxing butt welding on connector parts. During welding, heat of butt-joint parts of parts of the liquid accumulator shell or the muffler shell is stable and controllable, both sides reach the melting temperature at the same time, so good fusion is realized, the welding quality is improved, welding junctions are smooth and bright, the welding strength can be improved by more than 1.5 times in comparison with that of the traditional stove passing welding, and the production efficiency is improved by 3-6 times in comparison with that of the traditional stove passing welding, and 2-3 times in comparison with that of flashing welding. The force used for removing a pipe section is small during welding, and the clamping force is very small, so the clamping damage to the surface of the pipe section is not caused, and the equipment cost is only 1 / 5 to 1 / 3 that of the flash welding.

Description

technical field [0001] The invention relates to the fields of air conditioners and compressors, in particular to liquid accumulators for compressors, mufflers for air conditioners, gas-liquid separators or oil-gas separators for central air conditioners, and manufacturing methods and applications thereof. Background technique [0002] Compressor accumulator is used to store refrigerant. The main functions of compressor accumulator include realizing gas-liquid separation, removing foreign matter, and controlling the amount of oil returned. The air conditioner muffler, installed inside the air conditioner, is used to eliminate various noises such as the flow of refrigerant during the operation of the air conditioner system, and at the same time play a role in storing a part of the refrigerant. The gas-liquid separator used in the central air conditioner plays the role of gas-liquid separation in the operation of the system. The oil-gas separator for central air-conditioning p...

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Problems solved by technology

[0005] However, there are other problems with the above process: flash welding needs to clamp the various parts of the shell to implement the upsetting force and reach a certain upsetting speed, which is easy to cause clamping damage on the surface; if the shell adopts the above (2) In the case of this structure, due to the limitation of the flash welding process, the parts will be separated and approached during welding, and the three parts cannot be welded at the same time, and the welding needs to be performed twice; due to the multiple separation, contact, and alignment of each part, the welding The time neutrality is poor; due to the upsetting force, the molten iron at the welding part of each part is extruded to both sides, so that there are raised foreign objects on the inner and outer surfaces of the welding part of the shell, and due to the structural limitations of the liquid reservoir, especially the sealing After the ends are welded (the above-mentioned structure (1) is welded in pairs or the above-mentioned structure (2) is welded in the third part at the end), the raised foreign matter that is easy to fall off will be sealed in the shell and cannot be eliminated through subsequent processes. The existence of the liquid reservoir will not be used in the compressor; the welding power requirement is large, so the equipment investment is large; the welding strength is difficult to control, for example, when welding, each part is close to separation, the heat is unstable, and the welding quality is not good. Stable, and the thermal stress is large, the impact force is large, it is easy to cause lattice fracture and thermal cracks, and the end of the butt joint is easy to oxidize during the process, so that the inclusion of oxides in the welding place reduces the welding strength

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