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Single-stage mixed working medium low-temperature refrigeration system and control method thereof

A low-temperature refrigeration system and mixed working fluid technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of the cooling performance decline of the refrigeration system, the high and low pressure when starting up, etc., and solve the problems of slow cooling speed and simple structure. Effect

Inactive Publication Date: 2015-11-18
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, in addition to the above-mentioned high and low pressure problems when starting up, it will also cause the cooling performance of the refrigeration system to decline under high temperature conditions.

Method used

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  • Single-stage mixed working medium low-temperature refrigeration system and control method thereof

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Embodiment

[0026] Such as figure 1 shown. The single-stage mixed working medium low-temperature refrigeration system of the present invention includes a gas-liquid separator unit 1, a compressor unit 2, an oil separator unit 3, an air-cooled condenser unit 4, a dryer unit 5, a regenerator unit 9, a throttling Unit 10, evaporator unit 11;

[0027] The gas-liquid separator unit 1 is sequentially connected to the high-pressure end inlet of the compressor unit 2, the oil separator unit 3, the air-cooled condenser unit 4, the dryer unit 5, and the regenerator unit 9 through pipelines;

[0028] The outlet of the high-pressure end of the regenerator unit 9 is connected to the inlet of the low-pressure end of the regenerator unit 9 through the throttling unit 10 and the evaporator unit 11 in sequence; the outlet of the low-pressure end of the regenerator unit 9 is connected to the gas-liquid through a pipeline. The inlet of the separator unit 1;

[0029] The single-stage mixed working medium ...

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Abstract

The invention discloses a single-stage mixed working medium low-temperature refrigeration system and a control method thereof. The single-stage mixed working medium low-temperature refrigeration system comprises a gas-liquid separator unit, a compressor unit, an oil separator unit, an air-cooling condenser unit, a dryer unit, a re-heater unit, a throttle unit and an evaporator unit, and further comprises a regulating system for refrigerant mass flow and circulating component concentration, wherein the regulating system comprises a first normally closed solenoid valve, a third normally closed solenoid valve, a high-boiling-point working medium regulating tank, a fourth normally closed solenoid valve, a control unit, a second normally closed solenoid valve and a low-boiling-point working medium regulating tank. The control unit acquires air suction and discharge pressure of the compressor unit as well as pressure parameters of the regulating tank, and outputs a control instruction to the solenoid valves to regulate the mixed working medium flow and component proportion in the refrigeration system, so that the single-stage mixed working medium low-temperature refrigeration system can efficiently and stably produce a low temperature.

Description

technical field [0001] The invention relates to low-temperature refrigeration technology, in particular to a single-stage mixed working medium low-temperature refrigeration system and a control method thereof. Background technique [0002] The single-stage mixed working medium throttling refrigeration system uses a single compressor to compress the mixed working medium, and then the high-pressure and high-temperature mixed working medium is condensed into a gas-liquid two-phase through the condenser, and then enters the regenerator to further reduce the temperature, and finally passes through The throttling device throttles the flow and lowers the temperature, so as to obtain low temperature. Due to the simple structure, small pressure ratio, high cooling efficiency and no moving parts at the low temperature end, this refrigeration technology has been widely used in the fields of biomedicine, vacuum coating and petrochemical industry. [0003] In the cooling process of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B41/04F25B49/02F25B41/20F25B41/30
CPCF25B1/00F25B49/02F25B41/20
Inventor 刘金平庞伟强何家基许雄文
Owner SOUTH CHINA UNIV OF TECH
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