Ultra low temperature cool house

Abstract

The invention relates to an ultra low temperature cold storage warehouse, which belongs to the technical field of the structure of the cold storage warehouse. The invention is characterized in that the ammonia is used as the refrigerants and a low-temperature evaporator, and a middle-low temperature evaporator are arranged in the preparatory room and the reservoir pool; the low-temperature evaporator is communicated with an air-liquid separating heat exchange air return regulating station, a freezer with a single engine and a low-pressure circulation barrel through an air return regulating station for ammonia, and the liquid of the low-pressure circulation barrel is communicated with the middle-low temperature evaporator and communicated back to the low-pressure circulation barrel through a liquid pump; the low-temperature evaporator enters the low-pressure circulation barrel 6 through a regulating station for ammonia liquid and the air-liquid separating heat exchange air return regulating station is connected with the low-temperature evaporator through the regulating station for ammonia liquid; the gas of the low-pressure circulation barrel is communicated with a freezer with double engines, to an intermediate cooler and communicated back to the freezer with double engines, and the gas of the freezer with double engines is communicated with an oil separator; the output end of the oil separator is communicated with an evaporative cooler and the air-liquid separating heat exchange air return regulating station, and the evaporative cooler is communicated to a liquid receiver for ammonia; the liquid receiver for ammonia is communicated with the air-liquid separating heat exchange air return regulating station, the low-temperature circulation barrel and the intermediate cooler.

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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