Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd.

Mitsubishi Heavy Industries Thermal Systems, Ltd.

Shiro Matsubara

Koji Nakano

Nobuya Nakagawa

Satoshi Kominami

Hidetaka Sato

Keiji Nagasaka

Naoto Kunieda

Tomoyasu Adachi

Yoshihiro Hashizume

Kenji Shimizu

Noriyuki Chikagawa

Yasunari Tanaka

Hideto Noyama

Hideya Nishijima

Kiyotaka Sumito

In a heating-medium heating unit equipped with a first heating-medium circulation box and a second heating-medium circulation box which are in close contact with both surfaces of a PTC heater, in which heating-medium circulation passages are formed in the interior, and which are joined to each other in a liquidtight manner, wherein joining surfaces are sealed with liquid gaskets, the heating-medium circulation passages are provided with joining-surface cooling channels that cool the joining surface which is sealed with a liquid gasket and on which the heat from the PTC heater acts. The joining-surface cooling channels are provided at positions closer to the joining surface than to the PTC heater.

Heating-medium heating unit and vehicle air conditioner using the same

A heater control device includes a current calculating unit () which calculates a third value of current based on a first value of current flowing through a first PTC element of a first PTC heater which is in an energized state and a second value of current estimated to flow through a second PTC element of a second PTC heater which is to be newly put into an energized state next, and a switching control unit () which maintains a non-energized state of the second PTC element of the second PTC heater until it is determined that the third value of current calculated by the current calculating unit () is less than a predetermined maximum allowable value of current and puts the second PTC element of the second PTC heater into an energized state when the third value of current is less than the predetermined maximum allowable value of current.

Heater control device, and control method and control program for heater control device

A heater control device having at least two PTC heaters having PTC elements includes switching units which are provided so as to correspond to the PTC heaters and which switch an energized state and a non-energized state of the PTC elements by being turned ON and OFF, pattern information which defines state combination patterns of the energized state and the non-energized state of the PTC elements with respect to a required power value for the heater unit, and a ratio controlling unit which when the required power for the heater unit is at an intermediate value of the required power values defined in the pattern information, controls a ratio of the energized state to the non-energized state of the PTC elements based on a ratio of ON time to OFF time for which an average power within a certain period matches the required power.

Heater control device, method and program

Provided is a heat-transfer-medium heating apparatus including: a first heat-transfer-medium circulating box and a second heat-transfer-medium circulating box, which are attached to each other in a fluid-tight manner, in which heat-transfer-medium circulating paths are formed therein in close contact with both surfaces of a PTC heater; an electrical-component cooling wall member that is provided in, for example, the first heat-transfer-medium circulating box so as to be located adjacent to the heat-transfer-medium circulating path; and an electrical component that is fixed on the electrical-component cooling wall member, wherein a protruding portion is formed on the surface at the heat-transfer-medium circulating path side of the electrical-component cooling wall member so as to be positioned at exactly behind an installation position of the electrical component and to extend towards the heat-transfer-medium circulating path.

Heat-transfer-medium heating apparatus and vehicle air conditioning apparatus using the same

In a vehicle air conditioner () employing an air-mix method, airflow which passed through a bypass channel () and airflow which passed through a heated air channel () are mixed in an air-mix area () located downstream of an air-mix damper () and the airflow is guided to a foot outlet () through a foot channel () provided on the back side of a partition wall (A) constituting the heated air channel (). The vehicle air conditioner includes a mixing enhancement portion () that makes airflow flowing along the partition wall (A) flow toward the air-mix area () and an introduction portion () that is continuous with the mixing enhancement portion () and smoothly guides the airflow after air mixing to the foot channel () are provided at an end () of the partition wall (A) constituting an outlet of the heated air channel ().

Vehicle air conditioner

The invention provides an air mixing damper apparatus and an air conditioning apparatus for vehicles where the temperature of discharged air can be changed linearly with respect to the operation of an actuator lever. A rotation speed adjustment mechanism is disposed between a plate door type air mixing damper A for opening and closing an air introducing face of a heater core , and a rotation type lever for an actuator driving the air mixing damper A, for adjusting the rotation speed at an initial opening stage X and a final opening stage Z of the air mixing damper A, to a speed lower than at an intermediate opening stage Y.

Air mix damper device and vehicle air conditioner

A damper attaching structure which enables a damper provided with a thin rotational shaft to be assembled inside a casing or the like by employing an opening formed in the casing, is obtained by providing a concave groove which is formed in the inner surface of wall member and which is continuous from a casing opening; a positioning plate provided at the base of a damper thin shaft on the damper side thereof; a shaft hole which opens at the concave groove and which is larger than the cross section of the damper thin shaft; and a shaft fixing member which is provided on a lever, and which has an engaging hole into which the damper thin shaft is inserted and which engages the damper thin shaft member to enable torque transmission, and rotatably inserted into the shaft hole. The concave groove has a larger shape than the positioning member, the positioning member is inserted into the concave groove at the attachment position of the damper, and the positioning member adjusts the position of the damper along the shaft direction by intersection with the concave groove at the rotation position of the damper.

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Tokyo, Japan

Shiro Matsubara