| 摘要 |
Disclosed is an ultra low temperature freezer in which a double pipe is formed so that the volume of the double pipe for performing heat exchange between a refrigerant discharged from a condenser and a refrigerant discharged from an evaporator is 70% to 130% relative to the volume of an evaporation pipe, thereby rapidly lowering the temperature of the refrigerants to the ultra low temperature as the cooling cycle of the refrigerants is repeated. To this end, the present invention provides an ultra low temperature freezer comprising an evaporator having an evaporation pipe, a compressor, an expansion pipe, and a condenser, the freezer further comprising a first refrigerant pipe which is provided between the condenser and the expansion pipe and which is connected between the condenser and the expansion pipe, and a second refrigerant pipe which receives the first refrigerant pipe therein to form a double pipe and which is connected between the evaporator and the compressor, wherein the volume difference between the volume of the second refrigerant pipe and the volume of the first refrigerant pipe may be 70% to 130% relative to the volume of the evaporation pipe. |
