Variable-capacity jet compressor and refrigerating system with variable-capacity jet compressor

Abstract

The invention discloses a variable-capacity jet compressor and a refrigerating system with the variable-capacity jet compressor. The variable-capacity jet compressor comprises a compressor body and a jetting device; the compressor body comprises a compression mechanism and a variable-capacity valve arranged in the compression mechanism; the compression mechanism comprises a main bearing, an auxiliary bearing and an air cylinder assembly; the variable-capacity valve can move between the conduction position and the partition position, and when the variable-capacity valve is located at the conduction position, a variable-capacity air suction opening leads a first pressure refrigerant to the variable-capacity compression cavity; when the variable-capacity valve is located at the partition position, a second pressure refrigerant is led to the variable-capacity compression cavity; and the jetting device is suitable for leading a third pressure refrigerant to a constant-capacity compression cavity and the variable-capacity compression cavity, the pressure of the first pressure refrigerant is smaller than that of the third pressure refrigerant, and the pressure of the third pressure refrigerant is smaller than that of the second pressure refrigerant. According to the variable-capacity jet compressor, the size of the compressor body is reduced, occupied space of the compressor body is reduced, the jetting function is achieved, and quasi-second-order compression refrigeration cycle can be achieved.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a variable displacement jet compressor and a refrigeration system with the same. Background technique [0002] In related technologies, insufficient low-temperature heating capacity is a major criticism of current air-conditioning systems, and variable capacity technology is an effective way to solve this problem. However, although the variable capacity technology has changed the basic displacement of the compressor, it has also brought about the problem of low mechanical efficiency of the compressor when operating in a single cylinder, resulting in low overall energy efficiency. Therefore, the promotion of variable capacity technology has been stagnant . In addition, under ultra-low temperature conditions, the pressure ratio is large, the specific volume of the refrigerant is large, and the suction mass flow rate of the compressor is reduced. In addition to causing a significant redu...

AI Technical Summary

Problems solved by technology

However, although the variable capacity technology has changed the basic displacement of the compressor, it has also brought about the problem of low mechanical efficiency of the compressor when operating in a single cylinder, resulting in low overall energy efficiency. Therefore, the promotion of variable capacity technology has been stagnant

In addition, under ultra-low temperature conditions, the pressure ratio is large, the specific volume of the refrigerant is large, and the suction mass flow rate of the compressor is reduced. In addition to causing a significant reduction in the heating capacity of the compressor, at the same time, due to the decrease in mass flow rate, oil return is difficult. , the heat taken away by the refrigerant is reduced, which will easily lead to the wear of the compression mechanism of the compressor and the decrease of the reliability of the motor. This also leads to one of the reasons why the basic displacement becomes larger, but it is also difficult to apply

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