Solution pressure transformation desorption/compressing refrigeration cycle apparatus

Abstract

The invention relates to a refrigerating system, in particular to a variable pressure desorption-compression refrigeration cycle device which gasifies ammonia in water solution as refrigerant. The device comprises a low pressure generator, a compressor, a heat exchanger, a throttling device, a heat exchanger and a solution pump. The low pressure generator comprises a climbing film desorption tube, a gas channel and a solution channel. An outlet of the gas channel is communicated with an inlet of the compressor by a pipeline. An inlet of the solution channel is communicated with an outlet of the throttling device by a pipeline, and an outlet of the solution channel is communicated with an inlet of the heat exchanger. The gas channel is arranged above the climbing film desorption tube. The solution channel is correspondingly arranged under the climbing film desorption tube. The inside of the gas channel and the solution channel are respectively provided with a dropping device. The refrigerating capacity of unit refrigerant of the refrigerating system is much higher than the traditional evaporating refrigerating capacity. The solution generation pressure and pressure changes are controlled to equalize the refrigerating gas compression power with the traditional vapor compression refrigeration cycle. Therefore, higher refrigerating coefficients are obtained.

Description

technical field [0001] The invention relates to a refrigerating system, in particular to a pressure-swinging desorption-compression refrigerating cycle device which vaporizes ammonia from an aqueous solution as a refrigerant. Background technique [0002] At present, most commonly used refrigeration devices are vapor compression refrigeration cycle devices. The structure of the device is as follows: figure 1 As shown, it is mainly composed of an evaporator 1, a compressor 2, a condenser 3 and a throttling device 4. This device uses hydrocarbons or ammonia as a circulating working medium, that is, a refrigerant, and relies on the working medium in the evaporator 1 The evaporator absorbs heat to produce a cooling effect. The outlet of the evaporator 1 is connected to the inlet of the compressor 2. The steam generated by the evaporator 1 is compressed by the compressor 2 to condense it. The outlet of the compressor 2 is connected to the inlet of the condenser 3. The steam is s...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the refrigeration effect of the existing vapor compression refrigeration cycle device is difficult to improve, and propose a solution pressure swing desorption-compression refrigeration cycle device, which uses the solution to desorb in a low pressure generator at isothermal pressure The refrigeration capacity is generated, and the refrigeration capacity per unit working fluid is much higher than that of traditional evaporative refrigeration. By controlling the pressure and pressure changes of the solution, the compression work of the refrigerant gas can be equivalent to that of the traditional vapor compression refrigeration cycle, thereby obtaining a higher refrigeration coefficient.

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