Abstract: A first casing part (41), a second casing part (42) removable from the first casing part (41), a first screw (38) configured to secure a distal end portion (66A) of a first terminal (66) to a first connection portion (83), and a second screw configured to secure a distal end portion of a second terminal to a second connection portion are provided, the distal end portion (66A) of the first terminal (66) and the first connection portion (83) are disposed facing each other in a Z direction, and the distal end portion of the second terminal and the second connection portion are disposed facing each other in the Z direction.

Abstract: A second inclined portion (51A) including a second inclined face (51a) that expands a diameter of one end of a first communication port (51) is provided, and a width of the second inclined portion (51A) provided to one end of the first communication port (51) is made wider than a width of each of first inclined portions (49A, 50A) that expand diameters of an opening (49) and a recessed portion (50).

Abstract: A heating medium heating device includes: a plate-shaped PTC heater formed by making compressive heat transfer sheets cover individually two surfaces of a PTC element; a first heating medium distribution box including a first matching surface in which a PTC heater accommodating recess is formed, the PTC heater accommodating recess including a bottom surface with which the compressive heat transfer sheet located on a first-surface side of the PTC heater is in close contact; a second heating medium distribution box including a flat second matching surface that closes the PTC heater accommodating recess by being bonded, liquid-tightly via a liquid gasket, to the first matching surface, the second matching surface being a surface with which the compressive heat transfer sheet located on a second-surface side of the PTC heater is in close contact; and a barrier part rising from a peripheral edge part of the PTC heater towards the second matching surface.

Abstract: A heating medium heating device (10) includes: a PTC heater (40); a first heating medium distribution box (20) tightly sealed to one surface side of the PTC heater (40) and having a first heating medium distribution path (41) formed therein; a second heating medium distribution box (50) that is tightly sealed to the other surface side of the PTC heater (40) and having a second heating medium distribution path (42) formed therein, and which is connected to the first heating medium distribution box (20); an inlet header space (44) and outlet header space (45) that respectively connect the upstream ends and downstream ends of the first and second heating medium distribution paths (41, 42); an inlet portion (47) that feeds the heating medium into the inlet header space (44); and an outlet portion (48) that discharges the heating medium from the outlet header space (45).

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention provides a heat-transfer-medium heating apparatus using a PTC heater and a vehicular air-conditioning apparatus using such a heating apparatus, which have superior heat-conducting properties and ease of assembly, which can improve the heating capacity, and which can ensure sufficient electrical insulation. Included are a PTC heater having a stacked construction in which an electrode plate, an incompressible insulating layer, and a compressible heat-conducting layer are sequentially provided on each side of a PTC element so as to sandwich the PTC element; and heat-transfer-medium circulating boxes, respectively disposed in close contact with the two surfaces of the PTC heater and having circulating channels for the heat-transfer-medium formed therein. The heat transfer medium circulating inside the heat-transfer-medium circulating boxes is heated by radiant heat from the two surfaces of the PTC heater.

Abstract: The invention provides a heat-transfer-medium heating apparatus using a PTC heater and a vehicular air-conditioning apparatus using such a heating apparatus, which have superior heat-conducting properties and ease of assembly, which can improve the heating capacity, and which can ensure sufficient electrical insulation. Included are a PTC heater having a stacked construction in which an electrode plate, an incompressible insulating layer, and a compressible heat-conducting layer are sequentially provided on each side of a PTC element so as to sandwich the PTC element; and heat-transfer-medium circulating boxes, respectively disposed in close contact with the two surfaces of the PTC heater and having circulating channels for the heat-transfer-medium formed therein. The heat transfer medium circulating inside the heat-transfer-medium circulating boxes is heated by radiant heat from the two surfaces of the PTC heater.

Abstract: The invention provides a heat-transfer-medium heating apparatus using a PTC heater and a vehicular air-conditioning apparatus using such a heating apparatus, which have superior heat-conducting properties and ease of assembly, which can improve the heating capacity, and which can ensure sufficient electrical insulation. Included are a PTC heater having a stacked construction in which an electrode plate, an incompressible insulating layer, and a compressible heat-conducting layer are sequentially provided on each side of a PTC element so as to sandwich the PTC element; and heat-transfer-medium circulating boxes, respectively disposed in close contact with the two surfaces of the PTC heater and having circulating channels for the heat-transfer-medium formed therein. The heat transfer medium circulating inside the heat-transfer-medium circulating boxes is heated by radiant heat from the two surfaces of the PTC heater.