Throttling and refrigerating freezing storage box with two-stage fractional condensation and separation reheating type mixed working medium

Abstract

The invention discloses a throttling and refrigerating freezing storage box with a two-stage fractional condensation and separation reheating type mixed working medium, and the freezing storage box consists of a refrigerating system, a control system and a box body. Needed cold energy is provided by a throttling and refrigerating system with the two-stage fractional condensation and separation reheating type mixed working medium; a high-pressure outlet of a compressor module of the refrigerating system is connected with a high-pressure inlet of a reheating heat exchanger module; a high-pressure outlet of the reheating heat exchanger module is connected with a high-pressure inlet of a throttling module; a low-pressure outlet of the throttling module is connected with an inlet of an evaporation heat exchange module; an outlet of the evaporation heat exchange module is connected with a low-pressure inlet of the reheating heat exchanger module; a low-pressure outlet of the reheating heat exchanger module is connected with a low-pressure inlet of a refrigerating compressor module; the reheating heat exchanger module of the refrigerating system comprises two fractional condensation and separation sub-modules; needed refrigerating output is supplied to the inside of the box body with a heat insulating layer through the evaporation heat exchange module; and the control system implements the running control of a low-temperature freezing storage box through the operations to the compressor module and the throttling module by using the internal temperature of the box body as a target value and combining the running parameters and the working condition of the refrigerating system.

Description

Technical field [0001] The invention relates to a low-temperature refrigerating storage box adopting mechanical refrigeration, in particular to a refrigerating storage box with a two-stage condensate separation and regenerative mixed working fluid throttling refrigeration. Background technique [0002] Low-temperature cryopreservation is the most important method for maintaining the activity of biological materials, and cryogenic storage tanks have become important basic equipment in the fields of biomedical engineering, agriculture, animal husbandry, and aquaculture. A low-temperature freezer storage box generally refers to a mechanical refrigerated low-temperature freezer storage device with an effective storage temperature below -30°C, which is also commonly known as a low-temperature refrigerator or an ultra-low-temperature refrigerator. The mechanical refrigeration cryogenic freezer storage tank is an organic combination of refrigeration and cryogenic technology and scientif...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a refrigerated storage tank with two-stage condensate separation and heat-regenerating mixed working medium throttling refrigeration, which is driven by a conventional oil-lubricated single-stage compressor, and by adding an appropriate temperature zone at a low temperature in the refrigeration system The method of one-stage condensate separator solves the problem of the flammability of the working fluid well, and also takes into account the problem that methane working fluid cannot be used in the series in the low temperature area, which reduces the refrigeration efficiency of the system

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