A dual-machine rapid cooling low-temperature refrigeration system and method

A low-temperature refrigeration system and refrigeration method technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of slow cooling rate and deviation from operating efficiency, and achieve the effect of ensuring normal operation and stable long-term operation.

Inactive Publication Date: 2017-04-19
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the single-stage mixed working medium throttling refrigeration system is charging the mixed working medium, it is generally based on the optimal ratio of the mixed working medium circulation components under the design working condition, so the refrigeration system is lowered from normal temperature to the designed When the working condition corresponds to low temperature, its efficiency will deviate from its operating efficiency under the suitable proportion of mixed working fluid circulation components, which makes the cooling rate slower

Method used

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  • A dual-machine rapid cooling low-temperature refrigeration system and method
  • A dual-machine rapid cooling low-temperature refrigeration system and method

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Effect test

Embodiment 1

[0030] like figure 1 As shown, a dual-machine rapid cooling low-temperature refrigeration system includes a compressor unit connected by pipelines to form a refrigerant circulation path, an oil separator unit 12, an air-cooled condenser unit 2 with a fan 1, a dryer unit 3, Regenerator unit 5, throttling unit 7, evaporator unit 6, gas-liquid separator unit 15, also includes regulating valve 4, control unit 8, such as figure 2As shown, the compressor unit includes a first compressor 10 and a second compressor 14 connected in parallel, and the input ends of the first compressor 10 and the second compressor 14 are connected to a gas-liquid separator unit 15 through a distributor 9 , the output ports of the first compressor 10 and the second compressor 14 are respectively connected to the oil separator unit 12 through the first one-way valve 11 and the second one-way valve 13, and the inlet of the distributor 9 is also separated from the oil The oil return port of the device unit...

Embodiment 2

[0035] A kind of dual-machine rapid cooling low-temperature refrigeration method based on the above-mentioned system, comprising steps:

[0036] Step 1. Turn on the first compressor 10 and the second compressor 14. The throttling unit 7 is set for the corresponding opening degree under high temperature conditions. The control unit 8 is based on the pressure of the refrigerant at the exhaust end of the compressor unit 1. Adjust the opening of the temperature regulating valve 4 to ensure that the exhaust pressure and temperature of the compressor unit do not exceed the set maximum exhaust pressure and temperature values, so as to realize rapid cooling under high temperature conditions. The high temperature conditions refer to when the evaporator The working condition of the system when the temperature at the outlet of unit 6 is greater than the preset working condition temperature upper limit;

[0037] Step 2. When the temperature of the refrigerant at the outlet of the evaporat...

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Abstract

The invention provides a double-machine rapid cooling and low-temperature refrigeration system, which includes a compressor unit, an oil separator unit, an air-cooled condenser unit, a dryer unit, a regenerator unit, a throttling unit, evaporator unit, regenerator unit, gas-liquid separator unit, and also includes a regulating valve, a control unit, the compressor unit includes a parallel first compressor and a second compressor, the first compressor and The input end of the second compressor is connected to the gas-liquid separator unit through the distributor, and the invention provides a double-machine rapid cooling and low-temperature refrigeration method. The invention collects the exhaust pressure, temperature, power of the compressor unit and the outlet temperature of the evaporator unit through the control unit, and outputs control commands to the throttling unit, the regulating valve and the compressor unit, so that the refrigeration system can run efficiently and stably for a long time. At the same time, when one of the compressors fails, the normal operation of the refrigeration system can still be guaranteed.

Description

technical field [0001] The invention relates to low-temperature refrigeration technology, in particular to a dual-machine rapid cooling low-temperature refrigeration system and method, so as to achieve the purpose of fast, efficient and stable cooling of the low-temperature refrigeration system and normal operation when a single compressor fails. Background technique [0002] The single-stage mixed working medium throttling refrigeration system uses a suitable mixed working medium to obtain low temperature through one throttling under normal pressure ratio. It is an efficient, stable and reliable low temperature refrigeration system. It is used in medicine, biological engineering, chemical industry and other fields have been widely used. [0003] In the use of cryogenic refrigerators, especially in the fields of medicine and bioengineering, it is required that the refrigeration system cannot fail to cool during operation, otherwise the loss may be much greater than that of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B7/00F25B41/00F25B41/04F25B49/02F25B41/20F25B41/40
CPCF25B1/00F25B31/00F25B49/02F25B2400/075F25B41/31
Inventor 刘金平庞伟强何家基许雄文
Owner SOUTH CHINA UNIV OF TECH
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