Heat exchanger for vehicle

摘要

A heat exchanger for a vehicle may include a heat radiating portion provided with first and second connecting lines formed alternately by stacking plates, and receiving first and second operating fluids into the first and second connecting lines. The heat exchanger also includes a bifurcating portion connecting an inflow hole for flowing one operating fluid of the first and second operating fluids with an exhaust hole for exhausting the one operating fluid, and the bifurcating portion is adapted for the one operating fluid to bypass the heat radiating portion according to a temperature of the one operating fluid. The heat exchanger further includes a valve unit mounted corresponding to the inflow hole and adapted to flow the one operating fluid selectively to the heat radiating portion or the bifurcating portion according to the temperature of the one operating fluid flowing in the inflow hole.

主权项

1. A heat exchanger for a vehicle, comprising:
a heat radiating portion provided with first and second connecting lines formed alternately by stacking a plurality of plates, and receiving first and second operating fluids into the first and second connecting lines respectively, the first and second operating fluids heat-exchanging with each other during passing through the first and second connecting lines; a bifurcating portion fluid-connecting an inflow hole for flowing one operating fluid of the first and second operating fluids with an exhaust hole for exhausting the one operating fluid, and adapted for the one operating fluid to bypass the heat radiating portion according to a temperature of the one operating fluid; and a valve unit mounted corresponding to the inflow hole and adapted to flow the one operating fluid selectively to the heat radiating portion or the bifurcating portion according to the temperature of the one operating fluid flowing in the inflow hole, wherein the first operating fluid flows into the heat radiating portion through a first inflow hole and flows out from the heat radiating portion through a first exhaust hole, and the first inflow hole is connected to the first exhaust hole through the first connecting line, wherein the second operating fluid flows into the heat radiating portion through a second inflow hole and flows out from the heat radiating portion through a second exhaust hole, and the second inflow hole is connected to the second exhaust hole through the second connecting line, wherein the first and second inflow holes are formed at both sides of a surface of the heat radiating portion along a length direction of the heat radiating portion, wherein the first and second exhaust holes are distanced from the first and second inflow holes and are formed at the both sides of the surface of the heat radiating portion along the length direction of the heat radiating portion, wherein the valve unit includes a mounting cap fixedly mounted at the other end of the heat radiating portion corresponding to the first inflow hole, and a deformable member inserted in the mounting cap and adapted to extend or contract in the first inflow hole according to the temperature of the operating fluid, wherein the deformable member is formed by overlapping and contacting a plurality of ring members with each other in a coil spring shape, and wherein the one operating fluid flowing into the inflow hole flows to the bifurcating portion when two adjacent ones of the ring members directly contact with each other such that a gap between the two adjacent ring members is closed and thus the two adjacent ring members themselves physically seal the first connecting line of the heat radiating portion, and the one operating fluid flows into the first connecting line of the heat radiating portion through the gap between the two adjacent ones of the ring members when the two adjacent ones of the ring members are spaced apart from each other, wherein the ring members directly contact with each other as the temperature of the one operating fluid increases and separate as the temperature of the one operating fluid decreases.