Parallel circulation system with hot gas defrosting and cooling capacity recovery for two-temperature refrigerator

Abstract

The invention relates to a parallel circulation system with hot gas defrosting and cooling capacity recovery for a two-temperature refrigerator. A compressor outlet is divided into two ways connectedwith a condenser inlet and a three-way valve inlet; a condenser, a drying filter and a three-way valve are connected sequentially; two outlets of the three-way valve are connected with a refrigeratingchamber capillary inlet and a freezing chamber capillary inlet; a refrigerating chamber capillary outlet is connected with a refrigerating chamber evaporator inlet; a refrigerating chamber evaporatoroutlet is connected with a pipeline of a three-way valve outlet so as to be connected with a compressor inlet; a freezing chamber capillary is provided with two paths of outlets; one path is connected with a freezing chamber evaporator inlet and a one-way valve inlet; a one-way valve outlet is connected with a pipeline between the three-way valve outlet and the refrigerating chamber capillary inlet; the other path is connected with the freezing chamber evaporator inlet; a freezing chamber evaporator outlet is connected with one connector of the three-way valve; and the other connector of thethree-way valve is connected with the refrigerating chamber evaporator outlet so as to be connected with a compressor air suction port. According to the parallel circulation system with hot gas defrosting and cooling capacity recovery for the two-temperature refrigerator provided by the invention, the defrosting efficiency of a freezing chamber is improved, and meanwhile, a cooling performance thefreezing energy efficiency of a cooling system are further improved remarkably.

Description

technical field [0001] The invention belongs to the technical field of refrigeration of refrigerators, and in particular relates to a parallel cycle system for dual-temperature refrigerators with hot gas defrosting and cooling capacity recovery. Background technique [0002] Dual-temperature refrigerators are indispensable household appliances in modern families. The dual-temperature refrigerator has two storage rooms, a refrigerator and a freezer, and uses a vapor compression refrigeration system to achieve the required refrigeration and freezing temperatures. When the refrigerator is running, due to the low temperature of the evaporator in the freezer, frost will form on its surface, and the thickness of the frost layer will increase continuously. This results in a significant reduction in the refrigeration performance of the refrigerator. Therefore, the development of related defrosting technology in the field of refrigerators has always been a research topic that has b...

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Problems solved by technology

Obviously, this method complicates the structure and operation of the refrigeration system, so the current practical application is very limited

In hot gas bypass defrosting, a bypass valve is used to directly introduce the compressor refrigerant exhaust into the evaporator to melt the frost; however, the hot refrigerant gas will condense into liquid while melting the frost layer, which may cause compression The machine sucks the liquid, which reduces its working reliability; on the other hand, the frost layer itself stores cold energy, and this cold energy cannot be effectively used, which also makes the energy efficiency of the refrigeration system low.

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