Two-stage multiplex secondary throttling and intermediate incomplete cooling type refrigerating system

Abstract

The invention discloses a two-stage multiplex secondary throttling and intermediate incomplete cooling type refrigerating system and provides a refrigerating system realizing single-stage compression and two-stage compression circulation through valve switch. The refrigerating system comprises a first evaporator, a second evaporator, a high temperature air suction pipeline, a low temperature air suction pipeline, a medium pressure liquid supply pipeline and a plurality groups of compressor machine sets, wherein each group of compressor machine sets comprises a first compressor, a second compressor, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a condenser, a throttling device and an intermediate cooler. The refrigerating system is formed by the plurality of groups of compressor machine sets connected with the low temperature air suction pipeline, the high temperature air suction pipeline and the medium pressure liquid supply pipeline in parallel, the internal valves are opened or closed to realize the single-stage compression and two-stage compression circulation, and each compressor in double compressor machine sets can be singly used. The refrigerating system is flexible to adjust, and the temperature fluctuation in the refrigerator is small.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a two-stage multi-connection secondary throttling intermediate incomplete cooling refrigeration system. Background technique [0002] The multi-connected air conditioning system composed of multiple outdoor units and multiple indoor units is widely used in the field of air conditioning because of its flexible operation, high energy efficiency ratio, and easy control. However, the existing multi-connected air-conditioning systems are all single-stage compression refrigeration systems, which are only applicable to the air-conditioning field. For multi-temperature cold storage, multi-temperature refrigerated trucks, etc., when a single-stage compression refrigeration system (usually used in high-temperature refrigeration environments) and a two-stage compression refrigeration system (usually used in low-temperature refrigeration environments) coexist, high and low-temperature ...

AI Technical Summary

Problems solved by technology

However, the existing multi-connected air-conditioning systems are all single-stage compression refrigeration systems, which are only applicable to the field of air-conditioning

For multi-temperature cold storage, multi-temperature refrigerated trucks, etc., when a single-stage compression refrigeration system (usually used in high-temperature refrigeration environments) and a two-stage compression refrigeration system (usually used in low-temperature refrigeration environments) coexist, high and low-temperature refrigeration systems need to be The refrigeration system is independently configured in the environment, but they cannot be switched between each other, resulting in a waste of refrigeration device configuration. There is still a technical gap for multi-lines that can be used in single-stage and double-stage compression refrigeration cycles.

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