Carbon dioxide refrigeration device structure

Abstract

The invention relates to a carbon dioxide refrigeration device structure. The carbon dioxide refrigeration device structure is composed of a carbon dioxide compressor, an evaporator, a throttling valve and a condenser, wherein an exhaust port of the carbon dioxide compressor is connected with the condenser, an outlet of the condenser is connected with one end of the throttling valve, the other end of the throttling valve is connected with the evaporator, the other end of the evaporator is connected with a gas inlet of the carbon dioxide compressor, the evaporator is arranged in a refrigeration house body, and the condenser is arranged underground. According to the carbon dioxide refrigeration device structure, a common carbon dioxide refrigeration device structure is improved, single refrigerant carbon dioxide can be adopted, and the carbon dioxide refrigeration device structure is wide in application range, safe, controllable, efficient and capable of saving energy.

Description

Technical field: [0001] The invention relates to a refrigeration device structure, in particular to a refrigeration device structure using carbon dioxide as a refrigerant. Background technique: [0002] Due to the low critical temperature of carbon dioxide (31.1°C), refrigeration units designed to use carbon dioxide as a refrigerant at room temperature generally adopt a cascade structure, that is, a set of refrigeration systems with other refrigerants are used as condensers for refrigeration units with carbon dioxide as a refrigerant , the high-temperature grade uses ammonia (R717) or Freon as the refrigerant, the low-temperature grade uses carbon dioxide as the refrigerant, and the high-temperature grade ammonia (R717) or Freon evaporator is used to cool down the low-temperature carbon dioxide condenser. This conventional structure not only requires the use of two or more refrigerants, complex structure, high failure rate, small application range (only applicable to low-tem...

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Problems solved by technology

[0006] Because the present invention adopts the above technical scheme, the condenser is installed underground, utilizing the characteristics that the underground normal temperature is not higher than the critical temperature of carbon dioxide liquefaction (31.1 degrees Celsius), and the heat of the condenser is conducted below the ground, which not only solves the problem that the condenser is more than carbon dioxide The critical temperature of liquefaction (31.1 degrees Celsius) will cause the problem that the carbon dioxide refrigerant cannot be liquefied, and the efficiency is greatly improved

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