Air conditioning system

Abstract

The invention provides an air conditioning system. The air conditioning system comprises a compressor (1), a condenser (2), a throttling device (3) and an evaporator (4); the evaporator (4) comprises a vertical air collecting pipe (5); the top of the vertical air collecting pipe (5) is connected to an air suction port of the compressor (1) through an air suction pipe (6); a liquid return pipe (7) is arranged at the bottom of the vertical air collecting pipe (5); the other end of the liquid return pipe (7) is connected to the air suction pipe (6); a control valve (8) is arranged on the liquid return pipe (7); and the control valve (8) opens the liquid return pipe (7) when the air conditioning system reaches a preset condition. According to the air conditioning system provided by the invention, the problems that refrigerant liquid at the bottom of the evaporator is likely to directly return to the air suction pipe of the compressor through the oil return pipe and even reaches an oil pool of the compressor, the compressor is started with liquid in the next starting process, and liquid impact is likely to happen can be effectively solved.

Description

technical field [0001] The present application relates to the technical field of refrigeration, in particular to an air conditioning system. Background technique [0002] In the current vapor compression refrigeration cycle, the compressor is an important component. It is used as the power source of the refrigerant flow in the system cycle. Most compressors in the refrigeration cycle need sufficient lubrication to ensure the movement of the crankshaft, bearings, connecting rods, etc. The lubrication of the parts can also strengthen the sealing of the moving surface in the compression chamber. [0003] However, there are phenomena such as mutual solubility and separation between lubricating oil and refrigerant, and it is easy to retain lubricating oil in the refrigeration system. It is often impossible to achieve sufficient lubricating oil return flow in some harsh operating conditions, resulting in the lack of oil for the compressor to operate, which in turn leads to a decre...

AI Technical Summary

Problems solved by technology

[0009] Therefore, the technical problem to be solved in this application is to provide an air conditioning system, which can effectively solve the problem that the refrigerant liquid at the bottom of the evaporator is easy to return directly to the suction pipe of the compressor through the oil return pipe, or even reach the oil pool of the compressor. It will cause the problem that the compressor starts with liquid and is prone to liquid shock

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