| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminated heat exchanger where the deterioration of the sealing performance of a sealing portion of inlet and outlet headers caused by the deformation of the sealing portion can be eliminated, the deformation is generated at the time of having a PTC heater in close contact between flat heat exchanging tubes by sandwiching and pressing the PTC heater between the tubes, and a heat medium heating apparatus and an in-vehicle air conditioning apparatus using the laminated heat exchanger. <P>SOLUTION: The laminated heat exchanger 18 includes: flat heat exchanging tubes 17, each of which is configured by bonding two molded plates 17A, 17B that are provided with the outlet and inlet headers 22, 23 at both ends of a flat tube; and a heat exchanger pressing member 16 which presses and brings the flat heat exchanging tubes 17 to be in close contact with each other, the flat heat exchanging tubes is laminated so that the inlet and outlet header sections 22, 23 communicate with each other through communicating holes 24, 25. With respect to the inlet and outlet header sections 22, 23, at least one of the input position P1 of a pressing force applied by means of the heat exchanger pressing member 16, a position P2 where the pressing force is transmitted to the bonding portion of the two molded plates, and a position P3 where the pressing force is transmitted to the sealing portion between the inlet and outlet header sections is set at a position not on the same line L in the pressing force direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
