Cascade air cooling condensing unit

Abstract

The invention belongs to the field of energy and power engineering, and relates to a cascade air cooling condensing unit. The cascade air cooling condensing unit comprises a compressor, an oil gas separator, an air cooling condenser, a liquid storage device, an evaporator and a gas-liquid separator which are connected in sequence. The liquid storage device comprises a separating liquid accumulatorused for separating a high-boiling-point component and a low-boiling-point component which are different in boiling points, and an evaporative condenser used for liquefying the low-boiling-point component. The boiling point of the high-boiling-point component is higher than that of the low-boiling-point component. A liquid phase outlet of the separating liquid accumulator is connected with a first inlet of the evaporative condenser through a first throttling valve. A gas phase outlet of the separating liquid accumulator is connected with a second inlet of the evaporative condenser. A first outlet of the evaporative condenser is connected with a return gas pipe of the compressor. A second outlet of the evaporative condenser is connected with an inlet of the evaporator through a second throttling valve. An outlet of the evaporator is connected with the return gas pipe of the compressor through the gas-liquid separator. The cascade air cooling condensing unit has the advantages of high efficiency and energy conservation.

Description

technical field [0001] The invention belongs to the technical field of energy and power engineering, and in particular relates to a condensing unit, in particular to a cascade air-cooled condensing unit. Background technique [0002] The process of absorbing heat from a space or object below the ambient temperature and transferring it to the ambient medium is called refrigeration. Refrigeration technology is produced and developed to meet people's needs for sub-ambient temperature conditions. According to the classification of the current new textbooks, the range from ambient temperature to 120K is usually called refrigeration, that is, general cooling; the range from below 120K to absolute zero is called low temperature, that is, cryogenic. The machines and equipment necessary to achieve refrigeration are called refrigerators. Taking the most widely used vapor compression refrigerator as an example, the refrigerator includes four basic parts: compressor, condenser, thrott...

AI Technical Summary

Problems solved by technology

[0004] At present, both international and domestic production of vapor compression refrigeration condensing units work according to the reverse Carnot cycle or Lorentz cycle, and generally have the defect of relatively low energy efficiency.

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