| 摘要 |
<p>A heat exchanger (28) includes a planar heater (34) and a casing (38). A heater housing space (48) includes a flow passage space (74). The casing has an inflow port (70), an outflow port (72), an inflow passage (50), a communication passage (52), first ribs (76), and a second rib (53). The first ribs project from main surfaces (48a) toward heat transfer surface (36) in the flow passage space and are extended between two side surfaces (48b). The second rib is extended in the communication passage in a direction orthogonal to a direction in which a lower end of the planar heater extends.</p> |
