Double-temperature-area single-grade refrigerating system with expander

Abstract

The invention discloses a double-temperature-area single-grade refrigerating system with an expander. The system comprises a main compressor; a refrigerant outlet of the main compressor communicates with a refrigerant inlet of a condenser; a refrigerant outlet of the condenser communicates with a liquid supply inlet of a liquid storer; a refrigerant outlet of the liquid storer communicates with afirst refrigerant inlet of an economizer and a refrigerant inlet of a second expansion valve; a first refrigerant outlet of the economizer communicates with a refrigerant inlet of a first evaporator through a first expansion valve; a refrigerant outlet of the second expansion valve communicates with a refrigerant inlet of a second evaporator; a refrigerant outlet of the first evaporator communicates with refrigerant inlets of a linkage compressor and the main compressor; and a refrigerant outlet of the second evaporator communicates with refrigerant inlets of the expander and the main compressor. The double-temperature-area single-grade refrigerating system can improve the operating energy efficiency when using one set of refrigerating systems to refrigerate two different temperature areaspace.

Description

technical field [0001] The invention relates to the technical field of refrigeration systems, in particular to a dual-temperature zone single-stage refrigeration system with an expander. Background technique [0002] At present, for refrigeration systems, in refrigeration applications, there are often places with different temperature zones (that is, temperature ranges), for example, there are high-temperature storage (that is, a refrigerator with a storage temperature higher than 0 degrees) and a low-temperature storage (that is, a storage with a low temperature). Cold storage at -15 degrees), sometimes, in order to improve the energy efficiency level of the refrigeration system, it is necessary to use two sets of refrigeration system units to cool the high-temperature storage and the low-temperature storage respectively, but this will increase the primary input cost; and some Sometimes, in order to save the initial investment cost, a set of refrigeration system will be use...

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Problems solved by technology

[0002] At present, for refrigeration systems, in refrigeration applications, there are often places with different temperature zones (that is, temperature ranges), for example, there are high-temperature storage (that is, a refrigerator with a storage temperature higher than 0 degrees) and a low-temperature storage (that is, a storage with a low temperature). Cold storage at -15 degrees), sometimes, in order to improve the energy efficiency level of the refrigeration system, it is necessary to use two sets of refrigeration system units to cool the high-temperature storage and the low-temperature storage respectively, but this will increase the primary input cost; and some Sometimes, in order to save the initial investment cost, a set of refrigeration system will be used to refrigerate the cold storage in two different temperature zones. There is a secondary throttling at the outlet, which makes the energy efficiency level of the refrigeration system low

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