Patent ID: 9631841
Date: 2017-04-25
CPC Classifications: F25B,F28D

Claim:
1. A refrigerant evaporator in which heat exchange is performed between a subject-to-cooling fluid and a refrigerant, the refrigerant evaporator comprising: a first core portion having a plurality of tubes in which the refrigerant flows, a heat exchange being performed between a part of the subject-to-cooling fluid and a part of the refrigerant in the first core portion; a second core portion having a plurality of tubes in which the refrigerant flows, a heat exchange being performed between another part of the subject-to-cooling fluid and another part of the refrigerant in the second core portion; a third core portion having a plurality of tubes in which the refrigerant flows, and being disposed to overlap at least partly with the first core portion in a flow direction of the subject-to-cooling fluid, a heat exchange being performed between another part of the subject-to-cooling fluid and another part of the refrigerant in the third core portion; a fourth core portion having a plurality of tubes in which the refrigerant flows, and being disposed to overlap at least partly with the second core portion in the flow direction of the subject-to-cooling fluid, a heat exchange is performed between a part of the subject-to-cooling fluid and a part of the refrigerant in the fourth core portion; a first collecting portion provided at refrigerant-downstream ends of the plurality of tubes of the first core portion, the refrigerant being collected in the first collecting portion after passing through the first core portion; a second collecting portion provided at refrigerant-downstream ends of the plurality of tubes of the second core portion, the refrigerant being collected in the second collecting portion after passing through the second core portion; a first distributing portion provided at a refrigerant-upstream end of the third core portion, the refrigerant being distributed from the first distributing portion to the plurality of tubes of the third core portion; a second distributing portion provided at a refrigerant-upstream end of the fourth core portion, the refrigerant being distributed from the second distributing portion to the plurality of tubes of the fourth core portion; and an intermediate tank unit having a first passage through which the first collecting portion and the second distributing portion communicate with each other, and a second passage through which the second collecting portion and the first distributing portion communicate with each other, wherein the intermediate tank unit extends along the first distributing portion, the second passage includes: the first distributing portion is longer than the end passage in a flow direction of the refrigerant flowing in the throttle passage and extends adjacently to both the end passage and the throttle passage, and the throttle passage is directed toward a wall surface of the end portion in the end passage in the extending direction.