PROBLEM TO BE SOLVED: To suppress interference between each of compressible heat transmission sheets on both surfaces of a PTC heater and a liquid gasket for sealing between heat medium circulation boxes, to prevent delay in hardening of the liquid gasket.SOLUTION: A heat medium heating device comprises: a tabular PTC heater 40 including a PTC element 40a, both surfaces of which are covered with respective compressible heat transmission sheet 40c; a first heat medium circulation box 20, in which a bottom surface of a PTC heat housing recessed part 28a formed at a first matching surface M1 thereof, is tightly contacted with the compressible heat transmission sheet 40c at one surface side of the PTC heater 40; a second heat medium circulation box 50, in which a flat second matching surface M2 is liquid-tightly contacted with the first matching surface M1 through a liquid gasket to block the PTC heater housing recessed part 28a, and a compressible heat transmission sheet 40c at the ground surface side of the PTC heater 40 is tightly contacted with the second matching surface M2; and a barrier part 40e rising from a periphery part 40d of the PTC heater 40 toward the second matching surface M2.SELECTED DRAWING: Figure 9
【課題】PTCヒータの両面の圧縮性熱伝達シートと、複数の熱媒体流通ボックスの間をシールする液状ガスケットとの干渉を抑制し、液状ガスケットの硬化遅延を防止する。【解決手段】熱媒体加熱装置は、PTC素子40aの両面に圧縮性熱伝達シート40cが被装された平板状のPTCヒータ40と、その第1の合わせ面M1に形成されたPTCヒータ収容凹部28aの底面にPTCヒータ40の一面側の圧縮性熱伝達シート40cを密着させる第1の熱媒体流通ボックス20と、その平坦な第2の合わせ面M2が液状ガスケットGを介して第1の合わせ面M1に液密的に接合されることによってPTCヒータ収容凹部28aを閉塞し、第2の合わせ面M2にPTCヒータ40の他面側の圧縮性熱伝達シート40cを密着させる第2の熱媒体流通ボックス50と、PTCヒータ40の周縁部40dから第2の合わせ面M2に向かって起立する障壁部40eと、を有する。【選択図】図9
HEAT MEDIUM HEATING DEVICE AND VEHICLE AIR CONDITIONER USING THE SAME
熱媒体加熱装置およびこれを用いた車両用空調装置
2017-12-14
Patent
Electronic Resource
Japanese
IPC: | B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht / H05B ELECTRIC HEATING , Elektrische Heizung |
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