Commercial air conditioner

Abstract

The invention relates to a commercial air conditioner. The air conditioner consists of one or more outdoor units and indoor units connected with each other through refrigerant pipes, wherein a joint of a header pipe and each branch pipe on each refrigerant pipe is provided with a bifurcated pipe; the bifurcated pipe is integrally formed by a straight pipe and an inclined pipe, and one end of the inclined pipe is connected with the outer circumferential surface of the straight pipe; and one outer port of the straight pipe is connected with the header pipe, while the other outer port of the straight pipe and the outer port of the inclined pipe are connected with one branch pipe respectively. The commercial air conditioner has the advantages that the bifurcated pipe is integrally formed by the straight pipe and the inclined pipe, and the inclined pipe is made through extrusion forming on the outer circumferential surface of the straight pipe by means of a precise instrument; the machining mode ensures that the pipe wall thickness at the joint of the straight pipe and the inclined pipe is identical to those of other parts; the part does not blow out due to different pipe wall thicknesses during longtime operation, thereby improving product quality; in addition, because no lack of weld and unsoldering is caused during welding, no refrigerant leakage occurs.

Description

technical field [0001] The invention relates to an air conditioner, in particular to a commercial air conditioner. Background technique [0002] An air conditioner is a device that makes its internal refrigerant undergo a refrigeration or heating cycle consisting of a compression process, condensation process, expansion process, and evaporation process, and is usually divided into two types: split type and integrated type. Wherein the split type air conditioner is usually composed of an outdoor unit and an indoor unit which are connected to each other through refrigerant pipes and are arranged outdoors and indoors respectively. When the split type air conditioner is in the refrigeration cycle, the refrigerant compressed by the compressor and turned into a high-temperature and high-pressure state first flows into the outdoor heat exchanger, where the refrigerant will dissipate heat to the outside, then flow to the expansion valve, and flow through The expansion valve signifi...

AI Technical Summary

Problems solved by technology

However, there is the following problem in this prior art one-to-many air conditioner: because the pipe wall of the clamped part B on the branch pipe 80 will be thinned during the above-mentioned clamped process, the compressive capacity of this position is relatively insufficient , the strength test can only withstand the pressure of 55kgf / cm*G, and the high-pressure refrigerant flows inside it, so that it is only suitable for low-pressure systems, and if it is used in high-pressure systems, the wall thickness must be increased. As a result, the production cost increases, and in the long-term operation process, this part often bursts, which seriously affects the quality of the product

In addition, when the port of the branch pipe 83 is welded to the branch pipe connected to the indoor unit, since the distance between the welding part and the clamped part B is very close, it is easy to cause missing welding and desoldering.

In addition, due to the small size of the welding joint, it is difficult to find it during inspection, so there may be refrigerant leakage after a period of operation, resulting in insufficient pressure in the system, and in serious cases, it may cause the compressor to burn out due to overheating

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