摘要:
The cooling system includes: a frame; a plurality of electronic devices disposed in the frame and operating or functioning independently from each other; fans disposed in the frame and supplying cooling air to the electronic devices; a temperature acquiring portion for acquiring the temperature of the cooling air; an air-flow resistance adjusting portion for adjusting the air-flow resistance to the cooling air; and a controller for controlling the fans and the each air-flow resistance adjusting portion. The controller determines each target cooling air volume required for cooling each electronic device to a predetermined temperature based on temperature information acquired by the temperature acquiring portion and heat generation information on each electronic device, controls each air-flow resistance adjusting portion to set the volume of cooling air to each target cooling air volume, and performs the drive control of the fans to set the volume of cooling air to the minimum necessary.
摘要:
A resistance welding method for welding a stack of three or more workpieces. The method includes the steps of holding a first welding tip in abutment against a first outermost workpiece, holding a second welding tip in abutment against a second outermost workpiece, and holding a pressing member in abutment against the first outermost workpiece. The method also includes the steps of gripping the stacked assembly with the first welding tip, the second welding tip, and the pressing member and passing an electric current between the first welding electrode and the second welding electrode.
摘要:
A package apparatus is for packaging a power semiconductor device that includes a substrate formed, a mold part molded on the substrate, and electrode terminals extended from the mold part to a side opposite from the substrate by a predetermined length; includes: a holding unit that has insertion slots and is to holding the power semiconductor device, the insertion slots each being an opening into which the power semiconductor device is insertable in a direction perpendicular to extending direction of the electrode, edges of the opening being formed to make contact with the mold part and the substrate; and a container box that contains the holding unit. The insertion slots are provided to the holding unit so that an interval between the insertion slots in an extending direction of the electrode terminals of the power semiconductor device inserted is greater than the extending length of the electrode terminals.
摘要:
A resistance welding device is provided with a lower tip and an upper tip that serve as welding tips, and pressing rods that serve as pressing members. The upper tip and the pressing rods press a stacked body, which is to be welded, from the metallic plate side, which is the outermost member of the stacked body. The lower tip presses the stacked body from the lowermost metallic plate side. In this state, and electric current is conducted from the upper tip to the lower tip.
摘要:
A hydrogen production apparatus includes a preferential oxidation unit that preferentially oxidizes carbon monoxide in a reformed gas containing hydrogen, a vaporization flow path that passes water to generate steam, and a gas flow path through which the reformed gas passes. The gas flow path is arranged between the preferential oxidation unit and the vaporization flow path. The reformed gas passes through the gas flow path and thereafter flows into the preferential oxidation unit.
摘要:
A liquid discharge head includes a recording element substrate having a discharge-port surface having a discharge port discharging a liquid, side surfaces on sides of the discharge-port surface, and a back surface of the discharge-port surface having an opening of an ink supplying port supplying ink to the discharge port; a supporting member having a depression accommodating the recording element substrate, the depression including a supporting part disposed at a bottom surface of the depression and supporting the recording element substrate with an adhesive and an opening of an ink channel communicating with the ink supplying port; and an electric wiring substrate disposed on a surface of the supporting member having the depression and having an electric connecting part connecting with a side of the discharge-port surface of the recording element substrate.
摘要:
A resistance welding apparatus includes a welding gun having a first electrode tip serving as a first welding electrode, a second electrode tip serving as a second welding electrode, and a current branching electrode. The current branching electrode has an annular shape and is disposed in surrounding relation to the first electrode tip. The first electrode tip and the current branching electrode abut against a thinnest workpiece disposed on an outermost side of a stacked assembly that is resistance-welded by the resistance welding apparatus, and have opposite polarities to each other. When an electric current is passed from the first electrode tip to the second electrode tip and through the stacked assembly, a branched electric current flows from the first electrode tip to the current branching electrode.
摘要:
The aluminum-nitride-based composite material according to the present invention is an aluminum-nitride-based composite material that is highly pure with the content ratios of transition metals, alkali metals, and boron, respectively as low as 1000 ppm or lower, has AlN and MgO constitutional phases, and additionally contains at least one selected from the group consisting of a rare earth metal oxide, a rare earth metal-aluminum complex oxide, an alkali earth metal-aluminum complex oxide, a rare earth metal oxyfluoride, calcium oxide, and calcium fluoride, wherein the heat conductivity is in the range of 40 to 150 W/mK, the thermal expansion coefficient is in the range of 7.3 to 8.4 ppm/° C., and the volume resistivity is 1×1014 Ω·cm or higher.
摘要:
A package apparatus is for packaging a power semiconductor device that includes a substrate formed, a mold part molded on the substrate, and electrode terminals extended from the mold part to a side opposite from the substrate by a predetermined length; includes: a holding unit that has insertion slots and is to holding the power semiconductor device, the insertion slots each being an opening into which the power semiconductor device is insertable in a direction perpendicular to extending direction of the electrode, edges of the opening being formed to make contact with the mold part and the substrate; and a container box that contains the holding unit. The insertion slots are provided to the holding unit so that an interval between the insertion slots in an extending direction of the electrode terminals of the power semiconductor device inserted is greater than the extending length of the electrode terminals.
摘要:
An ink jet recording head has an array of ink ejection outlets in an ejection outlet forming surface, to which a protection tape is adhered during transportation. The ejection outlet forming surface has an outside area which is outside of each of opposite ends of the array with respect to a direction of the array, and the outside area has a peel resistance, provided by surface modification, which resistance is higher than in another portion of the ejection outlet forming surface.