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Hybrid working fluid single compressor double cycle double warmhouse low-temperature refrigeration box

A single compressor, mixed working medium technology, applied in compressors, compressors with multiple evaporators, coolers, etc., to overcome the difficulty of accurately controlling the temperature

Inactive Publication Date: 2005-03-23
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A double-greenhouse low-temperature freezer with a single compressor is not yet available

Method used

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  • Hybrid working fluid single compressor double cycle double warmhouse low-temperature refrigeration box
  • Hybrid working fluid single compressor double cycle double warmhouse low-temperature refrigeration box

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Experimental program
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Embodiment Construction

[0011] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0012] Such as figure 1 As shown, the present invention mainly includes the compressor 1, the condenser 2, the main capillary tube 3, the solenoid valve 4, the auxiliary capillary tube 5, the series connection evaporator 6 of the low-temperature room A, the independent evaporator 7 of the low-temperature room A, and the low-temperature room B Evaporator 8, accumulator 9.

[0013] The outlet of the compressor 1 is connected with the inlet of the condenser 2, the outlet of the condenser 2 is connected with the inlet of the main capillary tube 3, and the outlet of the main capillary tube 3 is connected with the inlet of the solenoid valve 4. One outlet of the solenoid valve 4 is connected to the inlet of the serial evaporator 6 of the low-temperature chamber A, and the outlet of the serial evaporator 6 of the low-temperature chamber A is connect...

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Abstract

The freezer has two low temperature chambers with optionally regulated temperature of -60 to -80 deg.c and -30 to -50 deg.c separately and includes a main circulating loop and an auxiliary circulating loop. The main circulating loop includes compressor, condensator, main capillary, three-way solenoid valve, serial evaporator for low temperature chamber A, low temperature chamber B evaporator and liquid storage; and the auxiliary circulating loop includes compressor, condensator, main capillary, three-way solenoid valve, auxiliary capillary, independent evaporator for low temperature chamber A, and liquid storage. Binary mixed ethylene-propylene working medium is used. The present invention may be used in preserving biological products suitable for two different temperature zones, and has high temperature controlling precision and less irreversible thermodynamic loss.

Description

Technical field [0001] The invention relates to a low-temperature freezer, in particular to a single-compressor, double-cycle, double-greenhouse low-temperature freezer using mixed working fluids, which is used for quick freezing of food and low-temperature storage of biological products, and belongs to the technical field of refrigeration. Background technique [0002] The current low-temperature freezers require the temperature in the box to reach -80°C, and most of them adopt the cascade or two-stage compression type. Due to the addition of a compressor and the increased complexity of the structure, the cost is increased. Although it is possible for the mixed working fluid to achieve a large temperature difference between evaporation and condensation within a small range of pressure changes, how to configure this kind of mixed working fluid for different refrigeration devices remains to be explored. At present, domestic and foreign researches on low-temperature refrigerators u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B5/02F25D11/02
Inventor 丁国良张春路
Owner SHANGHAI JIAOTONG UNIV