A bypass refrigeration heat exchange system for single-unit self-cascade refrigeration

Abstract

The invention particularly relates to the field of refrigeration systems, and aims to provide a bypass refrigeration heat exchange system for single-compressor auto-cascade refrigeration, which is low in exhaust pressure, exhaust temperature, power consumption and refrigeration loss, short in refrigeration time and high in refrigeration efficiency. The bypass refrigeration heat exchange system for single-compressor auto-cascade refrigeration comprises a compressor, a condenser, a heat exchanger, an evaporator, a throttling device and a bypass device, wherein an outlet of the compressor is connected with the condenser through an exhaust pipe; the condenser is connected with the inlet end of the heat exchanger through a pipeline; the tail end of the heat exchanger is connected with the inlet end of the evaporator through the throttling device; an inlet of the compressor is connected with the heat exchanger through an air return pipe; the outlet end of the evaporator is connected with the tail end of the heat exchanger through an air outlet pipe of the evaporator; the heat exchanger comprises a plurality of single cascade heat exchangers; the bypass device is led from the air outlet pipe of the evaporator.

Description

technical field [0001] The invention belongs to the field of refrigeration systems, and in particular relates to a bypass refrigeration heat exchange system for single-machine self-cascade refrigeration. Background technique [0002] With the development of refrigeration technology in our country, low temperature of -40°C to -60°C, ultra-low temperature of -86°C, and deep low temperature of -150°C have developed rapidly, and technological progress has driven technological innovation. 150°C), the cost of dual-compressor refrigeration is high, and the refrigeration industry is focusing on research and development of new products with lower cost, more environmental protection and more energy saving. The single-unit self-cascading refrigeration technology was born from this, but the existing single-unit self-cascading refrigeration system has high exhaust pressure, high exhaust temperature, long cooling time, large power consumption, low cooling efficiency, and large cooling los...

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Problems solved by technology

The single-unit self-cascading refrigeration technology was born from this, but the existing single-unit self-cascading refrigeration system has high exhaust pressure, high exhaust temperature, long cooling time, large power consumption, low cooling efficiency, and large cooling loss during operation. a series of questions

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