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 heat medium heating device includes: a casing in which the flat heat exchange tubes 12 and the PTC heater 13 are stacked in multiple layers and incorporated; and a control substrate of the PTC heater 13 incorporated in the casing. In the heat medium heating device in which a terminal 25A extending from each electrode plate 25 of the PTC heater 13 is directly connected to a connection portion of the control substrate, the width dimension of the flat heat exchange tubes 12 is greater than a contact surface width in a direction in which the terminal 25A extends from each electrode plate 25 in the PTC element 24 of the PTC heater 13, and the electrode plates 25 and the flat heat exchange tubes 12 excluding the PTC element 24 are superimposed in the wide portion.

Abstract: In an inverter in which noise reducing coils and a smoothing capacitor are provided on a power line to an inverter module to achieve a no-busbar configuration, simplification of the manufacturing process, reduction of the influence on the size of the inverter, enhanced noise reducing function, reduction in cost and so on, the smoothing capacitor is electrically connected, on the inverter module, to the power line in parallel with a power system board, and the noise reducing coils are connected to the power line by directly connecting output lead wires thereof to P-N terminals of the inverter module.

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 heat medium heating device 10 in which a heat exchange element 20 formed by stacking multiple flat heat exchange tubes 21 and multiple pairs of PTC heaters 26 in multiple layers is fastened and fixed into a casing 11 including heat medium outlet and inlet paths 15 and 16, connection portions 48 and 49 between a power supply HV harness and a control LV harness 44 are provided on an outer surface on one surface side where the heat medium outlet and inlet paths 15 and 16 of the casing 11 are provided, and a control substrate 33 that controls energization to the PTC heaters 26 is disposed on an inside on the same side as a surface on which the connection portions 48 and 49 of the casing 11 is provided.

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 are: a heat medium heating device capable of bringing: flat heat exchange tubes and PTC heaters; and inlet/outlet header parts of the flat heat exchange tubes, into sufficiently close contact with each other, and incorporating these components into a casing; and a vehicular air-conditioning device including the same. In a heat medium heating device, flat heat exchange tubes each including a flat tube part and inlet/outlet header parts and PTC heaters are stacked in layers, and a heat exchange holding member presses the flat heat exchange tubes from one side, whereby the stacked structure is incorporated on an inner bottom surface of a casing. In this configuration, at least uppermost one of the flat heat exchange tubes has one surface pressed by the heat exchange holding member, the one surface being formed into a planar shape in which the flat tube part and the inlet/outlet header parts are flattened.

Abstract: A heat medium heating device including flat heat exchange tubes and PTC heaters stacked in a plurality of layers, the heat medium heating device being capable of correctly and accurately detecting the temperature of a circulating heat medium; and a vehicular air-conditioning device including the same. In a heat medium heating device, flat heat exchange tubes each including an inlet header part and an outlet header part and PTC heaters are stacked in a plurality of layers, and are incorporated in a casing including a heat medium inlet path and a heat medium outlet path communicated with the inlet and outlet header parts. In the heat medium heating device thus configured, an inlet temperature sensor and an outlet temperature sensor that detect the temperature of a heat medium are provided around the inlet and outlet header parts of the lowermost flat heat exchange tube in the stacked structure.

Abstract: An object of the present invention is to provide a small, lightweight, and inexpensive heat medium heating apparatus in which a flat tube heat exchanger and a PTC heater are laminated in a multi-layered manner to reduce a thermal contact resistance thereamong, heat transfer performance is improved, and also in which assembling of the flat tube heat exchanger and the PTC heater is made easier.

Abstract: The heating-medium heating unit is provided with a plurality of flat heat-exchange tubes (17) each having an inlet header (22) and an outlet header (23) at one end or both ends of flat tube portions (20) through which a heating medium is circulated; sealing materials (26) that seal the peripheries of communicating holes (24, 25) of the inlet headers (22) and the outlet headers (23) of the stacked flat heat-exchange tubes (17); PTC heaters assembled between the flat tube portions (20) of the flat heat-exchange tubes (17); and a heat-exchange pressing member (16) that presses the alternately stacked flat heat-exchange tubes (17) and PTC heaters into close contact with each other, wherein a deformation-preventing reinforcing portion (29) is provided around each of the communicating holes (24, 25) in the inlet header (22) and the outlet header (23) of each of the flat heat-exchange tubes (17).

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: In an inverter in which noise reducing coils and a smoothing capacitor are provided on a power line to an inverter module to achieve a no-busbar configuration, simplification of the manufacturing process, reduction of the influence on the size of the inverter, enhanced noise reducing function, reduction in cost and so on, the smoothing capacitor is electrically connected, on the inverter module, to the power line in parallel with a power system board, and the noise reducing coils are connected to the power line by directly connecting output lead wires thereof to P-N terminals of the inverter module.

Abstract: The invention provides an integrated-inverter electric compressor and an inverter device thereof which allow handling of the inverter device by neither touching nor holding a CPU substrate. An integrated-inverter electric compressor includes an inverter module integrating a power-related metal substrate on which a power semiconductor switching device is mounted and a resin case integrally insert-molded with a plurality of terminals, and is provided with a CPU substrate on which a control and communication circuit having a device that operates at low-voltage is mounted on the upper surface of the inverter module, wherein the resin case is integrated with a grip which extends in a horizontal direction at an upper edge of a circumference thereof.

Abstract: The invention provides an integrated-inverter electric compressor and an inverter device thereof which allow handling of the inverter device by neither touching nor holding a CPU substrate. An integrated-inverter electric compressor includes an inverter module integrating a power-related metal substrate on which a power semiconductor switching device is mounted and a resin case integrally insert-molded with a plurality of terminals, and is provided with a CPU substrate on which a control and communication circuit having a device that operates at low-voltage is mounted on the upper surface of the inverter module, wherein the resin case is integrated with a grip which extends in a horizontal direction at an upper edge of a circumference thereof.