摘要:
A loop heat pipe includes: a first evaporator and a second evaporator each of which vaporizes a liquid-phase working fluid and converts the liquid-phase working fluid to a vapor-phase working fluid; a first condenser and a second condenser each of which condenses the vapor-phase working fluid and converts the vapor-phase working fluid back to the liquid-phase working fluid; a first vapor line through which the working fluid converted to the vapor phase is transported to the first condenser; a first liquid line through which the working fluid converted to the liquid phase is transported to the second evaporator; a second vapor line through which the working fluid converted to the vapor phase is transported to the second condenser; and a second liquid line through which the working fluid converted to the liquid phase is transported to the first evaporator.
摘要:
A power tool including: a base slidable on a workpiece, and an opening provided through the base; a main unit supported to the base and movable in a first direction substantially perpendicular to the base, the main unit including an electric motor; a cutter driven by the electric motor, the cutter being capable of protruding through the opening from the base; a stopper pole supported to a housing coupled to the main unit, the stopper pole being movable in the first direction, the stopper pole having one end protruding from the housing toward the base, thereby regulating a moving distance of the cutter; a digital display unit including a moving distance detection portion for detecting a moving distance of the stopper pole and a digital display portion for displaying the moving distance; and a dust prevention member provided between a part of the stopper pole protruding toward the base and the moving distance detection portion, thereby preventing dust from entering into the housing.
摘要:
A solution for removing an aluminum oxide film from an aluminum or aluminum alloy surface, which includes a salt or oxide of a metal capable of substituting aluminum, a solubilizing agent for ions of the metal, and an alkali, and which has a pH Of 10 to 13.5.The removing solution makes it possible to form a film of the metal derived from the metal salt or oxide contained in the removing solution by dissolving away the oxide film from the aluminum or aluminum alloy surface at a low temperature and a high speed while restraining, as securely as possible, erosion of the aluminum or aluminum alloy surface. Besides, the removing solution ensures that even in the case where the thickness of the aluminum or aluminum alloy basis material is very small, the aluminum or aluminum alloy surface can be activated while assuredly leaving the aluminum or aluminum alloy basis material.
摘要:
A soldering technology, particularly a lead-free soldering technology, that can secure the reliability of a whole electronic device is provided. In a method for manufacturing a printed circuit board for electronic devices with a substrate to which a plurality of electronic parts having connection terminals with different metal compositions are connected by soldering, a plurality of solder pastes comprising solder components with different compositions are used, and when the electronic parts are connected by soldering to the substrate, a solder paste having a solder component with a different composition is used for each of the metal compositions for the connection terminals of the electronic parts.
摘要:
A cooling structure for electronic equipment is designed for cooling a heat-generating body (2a) disposed inside a case (20) by recovering heat generated by the heat-generating body (2a) and dissipating the heat to the outside of the case (20). The cooling structure includes a heat-receiving section (4) for recovering heat generated in the heat-generating body (2a), a thermally insulated space (6) provided with an air inflow orifice (42a) and an air outflow orifice (42b) and thermally insulated from the heat-generating body (2a) and heat-receiving section (4) by a thermally insulating member (40), a heat-dissipating section (7) provided inside the thermally insulated space (6), a heat transfer member (5) for transferring the heat recovered in the heat-receiving section (4) to the heat-dissipating section (7), and a fan (22) for generating forcibly an air flow in the thermally insulated space (6). The heat generated by the heat-generating body (2a) is transferred to the heat-dissipating section (7) via the heat-receiving section (4) and heat transfer member (5) and dissipated in a concentrated fashion by using the fan (22) inside the thermally insulated space (6).
摘要:
A power tool has a base, a main unit, a cutter, a bolt, an engagement member, and a unit. The base has a sliding surface slidable on a workpiece, another surface opposite to the sliding surface, and an opening in the base. The main unit is movable in a first direction substantially perpendicular to the sliding surface. The cutter is driven by a electric motor in the main unit to protrude through the opening from the sliding surface during an operation. The bolt extends in the first direction on the first side, a first male thread, and one end supported by the base. The bolt is rotatable about the longitudinal axis. The engagement member has a first female thread threadably engaged with the male thread. The engagement member is movable between an engaged position with the boot and a disengaged position therewith. The unit maintains the engagement member at the disengaged position in a second direction. The rotation of the bolt causes the first male thread portion to thread with respect to the first male thread portion, thereby moving the main unit in the first direction and adjusting a distance of the main unit to the sliding surface.
摘要:
A plurality of carbon fibers having a surface having a metal-plated layer (Cu-plated layer) are stood vertically on a flat plate-like provisional substrate by electrostatic flocking, and one end of the carbon fibers is provisionally adhered to the provisional substrate with an adhesive. The other end of the carbon fibers which is not provisionally adhered is contacted with a substrate (Cu plate) having a surface coated with a solder paste and, in this state, a brazing material (solder) is melted and cooled, and carbon fibers and a substrate are brazed (soldered). After completion of mechanical and thermal connection between the substrate and the carbon fibers, this is immersed in an organic solvent, and the provisionally adhered provisional substrate is peeled from the carbon fibers to manufacture a radiating fin.
摘要:
A portable electrical tool includes a tip tool; a cylindrical housing accommodating a motor including a chuck attachably and detachably holding the tip tool at tip end of a rotation shaft; a base including a surface plate which slides on an upper surface of work material, and which allows the tip tool to protrude from the surface plate downwardly, a cylindrical portion including a cutout portion, and a lever having a cam surface, and rotatable to a fixed position and a release position. When the lever is in the fixed position, a gap at the cutout portion is narrowed to stop movement of the cylindrical housing. When the lever is in the release position, the cylindrical housing is movable by weight in the cylindrical portion. The tool includes a stopper to stop a rotation of the lever between the fixed position and the release position.
摘要:
There is provided a loop heat pipe which includes an evaporator that internally includes at least one wick built, a condenser, a liquid pipe and a vapor pipe that connect the evaporator and the condenser to each other, and a heat dispersion cavity that is formed inside the evaporator, and disperses a vapor, wherein the wick includes, a first wick that is porous, a second wick that is porous, the second wick being inserted into the first wick from the liquid pipe side and including a pore size larger than the first wick, and a vapor channel that is defined between the first wick and the second wick. The vapor channel is connected at an end on the liquid pipe side to the heat dispersion cavity.