Ultra low temperature cool house

Abstract

The invention relates to ultra-low temperature cold storage, which belongs to the technical field of cold storage structure. The feature is that ammonia is used as the refrigerant, and the preparation room and storage are equipped with low-temperature evaporators and sub-low temperature evaporators. The low-temperature evaporator is connected to the gas-liquid separation heat exchange return gas adjustment station, single-unit refrigerator, and low-pressure circulation barrel by the ammonia return gas adjustment station. The liquid in the low-pressure circulation barrel is connected by the liquid pump to the low-temperature evaporator and then back to the low-pressure circulation barrel. The low-temperature evaporator enters the low-pressure circulation barrel 6 from the ammonia liquid regulating station; The gas of the low-pressure circulation barrel is connected to the double-machine refrigerator, to the intercooler, and then connected back to the double-machine refrigerator. The gas of the double-machine refrigerator is connected to the oil separator, and the output end of the oil separator is connected to the evaporative cooler for gas-liquid separation and heat exchange. The return air regulating station, the evaporative cooler is connected to the ammonia liquid storage; the ammonia liquid storage is connected to the gas-liquid separation heat exchange return air regulating station, the low-pressure circulation barrel, and the intercooler. The invention has no destructive effect on the atmospheric ozone layer, and the three-stage compression process solves the problem that the storage tank drops to -60°C.

Description

1. Technical field [0001] The invention relates to an ultra-low temperature cold storage, which belongs to the technical field of cold storage structures. 2. Background technology [0002] At present, the refrigeration above -36°C almost uses ammonia as the refrigerant. The domestic tuna storage at -60°C is 100% imported from Japan, and all of them use Freon cascade refrigeration system, which uses R-22 and R-23. The biggest disadvantage of this kind of refrigeration system is that Freon destroys the ozone layer of the atmosphere, and its production and use will soon be stopped at home and abroad. There is no precedent for the ultra-low temperature of the ammonia system, and the use of ammonia as a refrigerant has no damage to the ozone layer of the atmosphere. 3. Contents of the invention [0003] The object of the present invention is to provide a kind of ultra-low temperature cold storage with no damage effect on the atmospheric ozone layer by the refrigerant, the stor...

AI Technical Summary

Problems solved by technology

[0002] At present, the refrigeration above -36°C almost uses ammonia as the refrigerant. The domestic tuna storage at -60°C is 100% imported from Japan, and all of them use Freon cascade refrigeration system, which uses R-22 and R-23. This kind of refrigeration system, the biggest disadvantage is that Freon destroys the ozone layer of the atmosphere, and the production and use of it will be stopped at home and abroad.

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