Patent ID: 7891211

Claim:
A cold storage tank unit for a refrigeration cycle apparatus having an evaporator, the cold storage tank unit being arranged in series with the evaporator on a low pressure side after pressure-reduced in the refrigeration cycle apparatus, the cold storage tank unit comprising: a cold storage heat exchanger including a plurality of tubes extending in a tube longitudinal direction in which refrigerant flows, and a pair of first and second tanks connected to longitudinal ends of the tubes at two end sides in the tube longitudinal direction to communicate with the tubes; a cold storage material tank which accommodates at least the tubes of the cold storage heat exchanger; and a cold storage material filled in the cold storage material tank, the cold storage material being cold-stored by refrigerant or being cold-released to cool gas refrigerant evaporated in the evaporator, wherein the second tank has a lower end portion that is positioned lower than a lower end portion of the first tank, and the second tank has a tank capacity capable of storing a predetermined liquid refrigerant condensed by cold storage heat of the cold storage material; and the cold storage heat exchanger includes a first partition member which partitions an inner space of the first tank into a first space and a second space, an inflow portion, communicating with the first space, for introducing refrigerant into the first space, and an outflow portion, communicating with the second space, for flowing out refrigerant.