Patent ID: 9506683
Filing Date: 2016-11-29
CPC Classification: B60H,F25B,F25D,F28D,F28F

Claim Text:
1. A heat exchanger comprising: a tube portion including a plurality of refrigerant tubes in which a refrigerant for exchanging heat with air flows, and a plurality of medium tubes in which a medium for exchanging heat with the refrigerant flows; a plurality of air passages provided between adjacent tubes of the tube portion; and a plurality of fins provided in the air passages and bonded to the adjacent tubes of the tube portion, wherein a first group of the refrigerant tubes and a first group of the medium tubes are disposed on an inflow side for the air of the tube portion, and each of the fins includes a protrusion extending at least in the vicinity of the adjacent medium tube, and protruding toward an upstream side of flow of the air with respect to the medium tube, the medium flowing through the medium tubes is a defrosting medium for supplying heat for a defrosting, one of the first group of the refrigerant tubes is positioned between two of the first group of the medium tubes on an inflow side for the air of the tube portion, the refrigerant tubes and the medium tubes being arranged in parallel, the protrusion protrudes toward an upstream side of the flow of the air with respect to the refrigerant tubes, the two protrusions, with respect to one of the refrigerant tubes disposed therebetween, form a clearance therebetween that allows melt water generated in the defrosting to flow through the clearance on an upstream side of the refrigerant tube, the refrigerant tubes and the medium tubes are arranged to extend in a direction of gravitational force, the clearance extends along the refrigerant tubes, each of the fins is made of a corrugated fin, each of the fins has a plurality of peak portions bonded to an adjacent refrigerant tube, and a width of the refrigerant tube in a stacking direction of the tubes is smaller than a half of a pitch of the plurality of peak portions of the fins.