To improve the separation performance between primary and secondary refrigerants in a heat exchange tank in a direct contact type secondary refrigerant refrigeration cycle.
A primary refrigerant inflow section 13 and a secondary refrigerant outflow section 16 are provided perpendicularly below the heat exchange tank 4, a primary refrigerant outflow section 15 and a secondary refrigerant inflow section 14 are provided perpendicularly above the heat exchange tank 4, the end portion of the primary refrigerant inflow section 13 is located perpendicularly above an end portion 16 of the secondary refrigerant outflow section, and at the same time a metal porous body 17 for preventing a primary refrigerant from flowing out is installed perpendicularly below the end portion of the primary refrigerant inflow section 13 in the heat exchange tank 4.
FUNAKURA SHOZO
OKAZA NORIHO
NISHIWAKI FUMITOSHI
