To suppress the deviation in the temperature of a heat medium.SOLUTION: A heat medium heating device 25 includes a PTC heater which is arranged in a casing 31 having a heat medium channel formed therein to heat the heat medium. The casing 31 includes: a first channel formation member 46 which is formed with a plurality of first channel grooves 70A forming a portion of a first heat medium channel 48; and a substrate storage member 45 which is provided so as to face the first channel groove 70A and is joined to the outer peripheral part of the first channel formation member 46 through a liquid gasket 80A. A first outer channel groove 71 located on the most outer side in the width direction among the plurality of first channel grooves 70A has the shallower channel depth than the first inner channel groove 72 located on the inner side in the width direction with respect to the first outer channel groove 71. When the channel width of the first channel groove 70A is defined as W, and the channel depth is defined as d, the first outer channel groove 71 has the larger value of W/d than the first inner channel groove 72. The channel cross-sectional area of the first outer channel groove 71 is equal to or larger than the channel cross-sectional area of the first inner channel groove 72.SELECTED DRAWING: Figure 5
【課題】熱媒体の温度の偏りを抑える。【解決手段】熱媒体加熱装置25は、熱媒体流路が内部に形成されたケーシング31内に配置され、熱媒体を加熱するPTCヒータを備える。ケーシング31は、第一熱媒体流路48の一部を形成する第一流路溝70Aが複数形成された第一流路形成部材46と、第一流路溝70Aに対向して設けられ、第一流路形成部材46の外周部に液状ガスケット80Aを介して接合される基板収容部材45と、を有する。複数の第一流路溝70Aの中で最も幅方向の外側に位置する第一外側流路溝71は、第一外側流路溝71よりも前記幅方向の内側に位置する第一内側流路溝72よりも流路深さが浅い。第一流路溝70Aの流路幅をW、前記流路深さをdとした場合に、第一外側流路溝71は、第一内側流路溝72よりも、W/dの値が大きい。第一外側流路溝71の流路断面積は、第一内側流路溝72の流路断面積以上の大きさである。【選択図】図5
HEAT MEDIUM HEATING DEVICE AND VEHICLE AIR CONDITIONER
熱媒体加熱装置及び車両用空調装置
2020-03-19
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 |
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