Heat medium heating unit and vehicle air conditioning apparatus provided with the same
AssigneeMitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd.
InventorSatoshi Kominami
Life of this patent
Estimating the term…
Abstract
Provided is a heat medium heating unit comprising a plurality of flat heat exchange tubes, PTC heaters incorporated between flat tube portions, a heat exchanger pressing member that presses from one side the flat tubes and the PTC heaters against the inner surface of a casing, and a control board that is disposed above the heat exchanger pressing member and that controls the PTC heaters. A terminal extending upwards from an electrode plate directly connects to a terminal supports of the control board. On an inner surface of the casing, since a positioning means that engages with the terminal to position the terminal and the plate, the thermal contact resistance between the flat heat exchanger tubes and the PTC heaters is reduced.
Claims10
A heat medium heating unit comprising:
- a plurality of flat heat exchange tubes each having a flat tube portion which takes a heat medium via an inlet header portion and which discharges the heat medium after having flowed through the flat tube portion via an outlet header portion;
- a PTC heater interposed between the flat tube portions of the plurality of flat heat exchange tubes which are stacked on one another;
- a heat exchanger pressing member for pressing the plurality of flat heat exchange tubes and the PTC heater from one side of the flat heat exchange tube toward an inner surface of a casing so that the plurality of flat heat exchange tubes and the PTC heater come into close contact with one another;
- and
- a control board installed on the heat exchanger pressing member, for controlling the PTC heaters, wherein
- a terminal extended from each of a pair of electrode plates of the PTC heater is directly connected to one or more terminal supports provided in the control board so that the PTC heater and the control board are electrically connected, and
- a positioning section which engages with the terminals to position the terminals and the electrode plates is provided on the inner surface of the casing.
A heat medium heating unit comprising:
- a plurality of flat heat exchange tubes each having a flat tube portion which takes a heat medium via an inlet header portion and which discharges the heat medium after having flowed through the flat tube portion via an outlet header portion;
- a PTC heater interposed between the flat tube portions of the plurality of flat heat exchange tubes which are stacked on one another;
- a heat exchanger pressing member for pressing the plurality of flat heat exchange tubes and the PTC heater from one side of the flat heat exchange tube toward an inner surface of a casing so that the plurality of flat heat exchange tubes and the PTC heater come into close contact with one another;
- and
- a control board installed on the heat exchanger pressing member, for controlling the PTC heaters,
- wherein a terminal extended from each of a pair of electrode plates which are provided on vertically opposite surfaces of the PTC heater is directly connected to one or more terminal supports provided in the control board so that the PTC heater and the control board are electrically connected,
- wherein an insulation wall erected upwardly is provided on the inner surface of the casing and at an external surface side of the terminal which is extended upwardly from the electrode plates, a wiring space is formed at an opposite side of the terminal with respect to the insulation wall, and the wiring space is for a power supply harness and an LV harness connected to the control board.
Dependencies are inferred from the claim text.