摘要:
An object-to-be-soldered (92) is accommodated in a sealable chamber (17). An internal pressure (P) of the chamber (17) is raised to a normal pressure (Po) or higher by feeding a reducing gas to the chamber (17). A soldering of a semiconductor element (12) with respect to a circuit board (11) is carried out in the pressurized state. The pressurized state indicating a set pressure (P1) (for example, 0.13 MPa) is maintained in a solder melting period (t3 to t7) until the molten solder (33) is solidified (t7) after the solder (33) starts melting (t3). Accordingly, voids are inhibited from being generated in the solder after being solidified.
摘要:
A heat radiator 1 includes an insulating substrate 3 whose first side serves as a heat-generating-element-mounting side, and a heat sink 5 fixed to a second side of the insulating substrate 3. A metal layer 7 is formed on a side of the insulating substrate 3 opposite the heat-generating-element-mounting side. A stress relaxation member 4 intervenes between the metal layer 7 of the insulating substrate 3 and the heat sink 5. The stress relaxation member 4 is formed of an aluminum plate 10 having a plurality of through holes 9 formed therein, and the through holes 9 serve as stress-absorbing spaces. The stress relaxation member 4 is brazed to the metal layer 7 of the insulating substrate 3 and to the heat sink 5. This heat radiator 1 is low in material cost and exhibits excellent heat radiation performance.
摘要:
A pressure tank includes a liner separated into a cap and a main body. A shell covers the outer surface of the liner. The shell is formed of a fiber reinforced plastic. A heat exchanger is arranged in the liner. A header is connected to the heat exchanger. The heat exchanger is supported on the liner by fastening the header to the cap or the main body.
摘要:
A high pressure tank has a cylindrical liner and a fiber reinforced plastic layer which covers the outer surface of the liner. At least one end of the liner is separable. The liner includes a cylindrical liner body and a lid. An O-ring is located between the contact surfaces of the liner body and the lid in the circumferential direction. Each contact surface has a seal surface which contacts the O-ring. One of the liner body and the lid has a deformable portion which deforms toward the seal surfaces. The structure can securely seal the separated portions of the liner when the high pressure tank is in a high pressure state.
摘要:
In a fuel cell system 10, a refrigerant channel 70 that circulates refrigerant is configured to exchange heat between the refrigerant and each of a fuel cell 30, a hydrogen storage tank 20 having a hydrogen storage alloy, and a radiator 50. The hydrogen storage alloy has a higher absorption temperature at which absorption and release become equilibrium under the predetermined hydrogen pressure than the temperature of the fuel cell 30 in a steady-state operation. The refrigerant after cooling the fuel cell carries the heat generated by hydrogen absorption to the hydrogen storage alloy during storing from the tank 20 and facilitates absorption of hydrogen.
摘要:
A hydrogen-storage container which demonstrates a high hydrogen-storage capacity, which is reduced in mass, and which is suited to be installed in an automobile is provided. In a hydrogen-storage container holding a hydrogen-occlusion alloy in which hydrogen is occluded, an air gap portion formed in the container is filled with hydrogen gas whose pressure is above a plateau equilibrium pressure of hydrogen gas contained in the hydrogen-occlusion alloy at a temperature of a location where the hydrogen-storage container is installed. This hydrogen-storage container has a liner made of metal or resin, and a fiber-reinforced resin layer provided outside the liner.
摘要:
The technique of the invention manufactures a gas storage tank, which includes a gas absorbent/adsorbent and is capable of storing a high-pressure gas. The manufacturing process of a hydrogen storage tank first assembles a heat exchanger unit and packs the particles of hydrogen storage alloy into the heat exchanger unit. The manufacturing process then blocks hydrogen storage alloy filling holes used for packing the hydrogen storage alloy in the heat exchanger unit and attaches a detachable cover member to a hydrogen inlet. The manufacturing process subsequently locates the heat exchange unit filled with the hydrogen storage alloy in a cylindrical tank and narrows both ends of the tank to form joint openings. The manufacturing process then heat-treating the tank under water cooling and detaches the cover member. The manufacturing process attaches joint assemblies to the joint openings and forms a reinforcement layer around the outer circumference of the tank to complete the hydrogen storage tank.
摘要:
A rotation balancing mechanism of an orbiting scroll of a scroll-type compressor that reduces the outer diameter of the compressor housing. A compression mechanism includes a fixed scroll and an orbiting scroll. The compression mechanism is coupled to a support frame at the front of a drive motor. A drive crankshaft is located between the drive shaft of the motor and a base plate of the orbiting scroll. The drive crankshaft causes the orbiting scroll to orbit. Follower crankshafts are located between the support frame and the base plate. The follower crankshafts permit the orbiting scroll to orbit and prevent the orbiting scroll from rotating about its own axis. A central balance weight is located on the drive crankshaft. The central balance weight opposes part of the centrifugal force that is applied to the drive crankshaft when the orbiting scroll orbits. Outer balance weights are attached to the follower crankshafts to oppose the remainder of the centrifugal force.
摘要:
A rod-type three-dimensional weaving method and apparatus sends weft rods from within a rod magazine between groups of warp rods consisting of a large number of warp rods disposed parallel to one another by means of rod pushers substantially continuously by automatically changing a used-up magazine with another one filled with a new set of weft rod groups. To achieve such continuous weaving, a sensor senses a point where one of the rods in the magazine reaches the preset limit for a magazine change, and a control unit acting on the signal from the sensor removes the used-up magazine and brings another magazine filled with a new set of rod groups into the rod filling position. Or the same control unit stops the rod pushers on one side and starts feeding weft rods from the opposite side by employing the magazine and rod pushers on the opposite side of the group of warp rods, with a significant reduction in the weaving time.
摘要:
A method of regulating the tension of warp yarns in a weaving machine is disclosed herein. In a preferred embodiment of the invention, variation in warp yarn tension is detected by a tension roller which is movable with a change in the tension. The speed at which a warp beam is rotated is controlled in dependence upon the manner of the tension roller movement in such a way that its unwinding rotation during normal weaving operation of the machine is speeded up with an increase in the warp yarn tension and slowed down with a decrease therein, and also that its rewinding rotation during reversing operation of the machine is decelerated with an increase in the warp yarn tension and accelerated with a decrease in the tension.