Totally-enclosed rotor type refrigerating compressor with compression cycle of cold cylinder

Abstract

A present totally-enclosed rotor type refrigerating compressor has two vicious cycles. The effects of a hot cylinder are as follows: a high-temperature motor rotor and compressing heat emission are accumulated at an air cylinder, expansion is caused after air suction and heating, the temperature of compressed exhaust air is increased, the power of a motor is increased, and the like. The cold damage is as follows: when a cold cylinder and an air suction pipeline are under high temperature and pressure, the compressed exhaust air is sucked into an air chamber for evaporation and heat absorption after condensing dilute lubricating oil, and the like. Therefore, only 50% of cold quantity can be obtained. The realizing steps of the compression cycle (virtuous) of the cold cylinder are as follows: 1. compression of the cold cylinder: the hot cylinder is cooled, eliminates compression and releases heat to reduce net compression work and condensation load; 2. air suction of the cold cylinder: the characteristic of low temperature of an air suction chamber is realized by continuous low-temperature air suction and low-temperature cooling of the hot cylinder so as to increase the cold quantity; 3. improvement of an oil channel: the air suction force is increased; 4. the overheating of the exhaust air and the heat emission of the motor are used for heating the lubricating oil with absorbing property, and an absorbent has low differential pressure and good absorbing property on the surface of the cooled air chamber, so as to further increase the cold quantity and reduce the net compression work. The efficiency is that the power of the motor is reduced by more than 30% and the cold quantity is increased by 2 times.

Description

technical field [0001] A vapor compression refrigeration compressor, in particular a fully enclosed rotor refrigeration compressor. technical background [0002] The fully enclosed rotor refrigeration compressor has been widely used, but its industrial technology has two major technical faults that affect efficiency: hot cylinder effect and cold damage. [0003] The working temperature of the motor winding is about 130°C, and there is an auxiliary cooling of the casing, while the motor rotor has no auxiliary cooling of the casing, the working temperature should be about 150°C, and it is directly transmitted to the cylinder through the spindle, forming a strong thermal cylinder effect, and the compression heat release also forms a thermal cylinder Effect, the hot cylinder effect makes the working temperature of the cylinder wall rise. On the one hand, the intake air is heated and expands to lose cooling capacity, and on the other hand, it further strengthens the compression a...

AI Technical Summary

Problems solved by technology

[0005] Due to the dual effects of hot cylinder effect and chilling injury, the cooling capacity is greatly lost, and only about 50% of the cooling capacity can be obtained

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