Two-stage compression refrigeration system, refrigeration control method and refrigeration equipment

Abstract

The invention discloses a two-stage compression refrigeration system, a refrigeration control method and refrigeration equipment. The two-stage compression refrigeration system comprises a first-stagecompression unit, a second-stage compression unit, a condenser, a first-stage throttling element, a first evaporator and a second evaporator which are connected in sequence. An exhaust port of the first-stage compression unit is connected with an air suction port of the second-stage compression unit through an intermediate cooling pipeline, an outlet of the first evaporator is connected with theintermediate cooling pipeline, an outlet of the second evaporator is connected with the air suction port of the first-stage compression unit, the first evaporator is connected with a switching module,refrigerants sequentially flow through the condenser, the throttling element and the switching module, and the switching module can be switched to feed the liquid refrigerant or the gaseous refrigerant into the first evaporator. Switching can be carried out when different refrigeration requirements are met, and the energy consumption of the system is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a two-stage compression refrigeration system capable of switching between different refrigeration demands, a refrigeration control method and refrigeration equipment. Background technique [0002] Refrigeration equipment is widely used in daily life. Refrigeration equipment generally adopts a single-stage compression refrigeration system or a two-stage compression refrigeration system. As one of the most common refrigeration equipment, refrigerators have various forms of refrigeration systems. For example, the publication number is CN205351841U The utility model patent of the patent discloses a two-stage compression refrigerator system. By using two-stage compression, the evaporation temperature matching the room temperature of the two chambers of the refrigerator is respectively formulated. When the temperature of the refrigerator chamber meets the requirements, o...

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Problems solved by technology

[0002] Refrigeration equipment is widely used in daily life. Refrigeration equipment generally adopts a single-stage compression refrigeration system or a two-stage compression refrigeration system. As one of the most common refrigeration equipment, refrigerators have various forms of refrigeration systems. For example, the publication number is CN205351841U The utility model patent of the patent discloses a two-stage compression refrigerator system. By using two-stage compression, the evaporation temperature matching the room temperature of the two chambers of the refrigerator is respectively formulated. When the temperature of the refrigerator chamber meets the requirements, only a small amount of cooling capacity is actually required. It is enough to maintain the temperature of the refrigerating room. However, the refrigerating evaporator of this compression refrigerator system can only evaporate and cool through the liquid refrigerant after the first stage of throttling. After continuous operation, the actual temperature of the refrigerating room will be lower than the set temperature. Compensate the temperature of the refrigerator, resulting in increased energy consumption of the refrigerator

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