Adsorption and vapor compression cascade type refrigeration device and control method thereof

Abstract

The invention relates to an adsorption and vapor compression cascade type refrigeration device and a control method thereof. The refrigeration device comprises a two-stage adsorption refrigeration system, a phase-change cold storage system and a vapor compression refrigeration system, wherein the two-stage adsorption refrigeration system realizes refrigeration under the drive of low-grade heat energy, a first evaporator in the two-stage adsorption refrigeration system is coupled with a second condenser in the vapor compression refrigeration system through the phase-change cold storage system and thereby vapor compression refrigerant of the vapor compression refrigeration system can emit heat outwards at lower condensing temperature. Under the situation that the same refrigeration temperature is realized, compared with the single-stage vapor compression refrigeration device, the electric energy consumption of the adsorption and vapor compression cascade type refrigeration device is greatly reduced. The phase-change cold storage system is arranged on the first evaporator of the two-stage adsorption refrigeration system, the phase-change cold storage system can store partial cold energy to guarantee that the vapor compression refrigerant of the vapor compression refrigeration system is at stable condensing temperature, and the vapor compression refrigeration system can realize lower evaporating temperature.

Description

technical field [0001] The invention relates to an adsorption and vapor compression cascade refrigeration device and a control method thereof, which belong to the field of heat energy utilization and refrigeration and air conditioning. Background technique [0002] The low temperature in refrigeration technology refers to the temperature on the evaporator side, and the range of low temperature varies in different applications. In industrial refrigeration, the temperature in the evaporator is -45°C to -50°C, which is considered low temperature. In the field of cryogenic medicine and cryogenic biology, the range of low temperature is -73°C to -123°C. [0003] Compression refrigeration is an effective way to achieve low temperature. Usually, due to the limitation of ambient temperature, the single-stage compression refrigeration method requires a higher compression ratio to achieve low temperature refrigeration. The increase in the compression ratio will cause the air transmiss...

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Problems solved by technology

Through the retrieval of low-temperature compression refrigeration technology, it was found that Japan Sanyo Electric Co., Ltd. applied for the patent No. CN00813328.X, and the patent name is "multi-stage compression refrigeration device". Stage side compression mechanism, condenser, first decompression mechanism, intercooler, second decompression mechanism and evaporator, this device can achieve a lower evaporation temperature, but the device adopts multi-stage compression with high power consumption and structure complex and costly

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