Multi-cycle compound system for refrigerating and freezing

Abstract

A multi-cycle compound system for refrigerating and freezing is characterized in that the system comprises a multi-cycle common compound power module I, a multi-cycle common compound auxiliary equipment module II, an exo-warehouse multifunctional compound module III and an intra-warehouse multifunctional compound module IV; the multi-cycle common compound power module I is composed of a refrigerating and freezing multi-cycle common compound power subsystem 1, a first electric three-way valve F11 and an eighth electric three-way valve F12; the multi-cycle common compound auxiliary equipment module II is composed of a refrigerating and freezing multi-cycle common compound auxiliary equipment subsystem 2, a fourth electric three-way valve F22 and a fifth electric three-way valve F21; the exo-warehouse multifunctional compound module III is composed of an exo-warehouse subsystem 3, a second electric three-way valve F31, a third electric three-way valve F33, a ninth electric three-way valve F32 and a tenth electric three-way valve F34, specifically, the exo-warehouse subsystem 3 comprises a front multifunctional compound heat exchanger 3-1, a rear multifunctional compound heat exchanger 3-2 and an exo-warehouse side draught fan 3-3; and the intra-warehouse multifunctional compound module IV is composed of an intra-warehouse subsystem 4, a sixth electric three-way valve F43, a seventh electric three-way valve F41, an eleventh electric three-way valve F44 and a twelfth electric three-way valve F42, specifically, the intra-warehouse subsystem 4 comprises a front multifunctional compound heat exchanger 4-1, a rear multifunctional compound heat exchanger 4-2, an intra-warehouse side draught fan 4-3 and a PTC electric heating unit.

Description

technical field [0001] The invention provides a multi-cycle composite system for refrigeration and freezing. The composite system can realize refrigeration and refrigeration cycles, refrigeration and heating cycles, refrigeration and refrigeration cycles, and composite heat exchangers in warehouses according to the actual needs of warehouse refrigeration and freezing operations. Various thermodynamic cycle working modes such as rapid defrosting self-circulation, rapid defrosting self-circulation of compound heat exchanger outside the warehouse, etc. Background technique [0002] With the improvement of national living standards, the refrigeration and freezing of food and medicine have attracted much attention. Therefore, it has become the current research direction of the industry to design a reasonable, efficient, practical, and economically feasible multi-cycle composite system for refrigeration and freezing. Due to the low temperature inside or outside the warehouse, fro...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-cycle composite system for refrigeration and freezing in view of the shortcomings of the above-mentioned prior art, so as to solve the problem of serious frosting on the surface of the evaporator when the current refrigeration and freezing temperature is too low, resulting in replacement The thermal performance is reduced, and the outstanding problems such as failure to meet the temperature requirements of freezing and refrigerating

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