Abstract: To provide a structure capable of securing satisfactory induction coupling efficiency and high reliability in manufacturing an induction coupling apparatus used in power line carrier communication, the induction coupling apparatus having a magnetic core formed from a first core element part and a second core element part so that a gap would be formed between the core element parts, includes: a core parallel moving mechanism for carrying out relative and parallel movement of the first core element part and the second core element part in a direction that the length of the gap varies; and a predetermined gap length regulating member for limiting parallel movement in a direction that the first core element part and the second core element part approach each other to regulate the gap length to the predetermined gap length in the case that the core parallel moving mechanism is used for the parallel movement.

Abstract: To provide a structure capable of securing satisfactory induction coupling efficiency and high reliability in manufacturing an induction coupling apparatus used in power line carrier communication, the induction coupling apparatus having a magnetic core formed from a first core element part and a second core element part so that a gap would be formed between the core element parts, includes: a core parallel moving mechanism for carrying out relative and parallel movement of the first core element part and the second core element part in a direction that the length of the gap varies; and a predetermined gap length regulating member for limiting parallel movement in a direction that the first core element part and the second core element part approach each other to regulate the gap length to the predetermined gap length in the case that the core parallel moving mechanism is used for the parallel movement.

Abstract: A semiconductor laser light source device and light source unit according to the present invention include a first plate-like member made of metal, to which a semiconductor laser array is joined along the end portion, a second plate-like member made of metal, in which an inlet opening portion, which introduces cooling fluid, and a cooling fluid draining channel, and a third plate-like member made of metal, which is formed along the area corresponding to the end portion and to which at least one cooling channel is provided through which cooling fluid flows in the longitudinal direction of the semiconductor laser array by communicating the cooling fluid introducing channel and the cooling fluid draining channel. Thus, the sectional area of the channel can be larger than that in the construction of the related art and the processing cost is reduced by comparison with the construction of the related art.

Abstract: To eliminate a fear of electrolytic corrosion even in the case where a heat exchanger to be connected to the outside of the plate-type heat exchanger has a copper piping, and to prevent any damage from being given to the brazed portions of the plate-type heat exchanger at the time of joining pipes and to prevent faults from being generated in joined portions. An intermediate pipe made of a material in which the value of polarization potential becomes lower than that generated between a body of the plate-type heat exchanger and the copper piping is interposed between the plate-type heat exchanger body and the copper piping. Further, the plate-type heat exchanger body is disposed in a position out of a vertical line of a joined portion between the copper piping and the intermediate pipe.

Abstract: An air conditioning system of the present invention has a refrigerant circuit including a compressor, an oil separator, a condenser, a expansion device, an evaporator, a first accumulator, and a second accumulator which are connected in order by piping, said evaporator, said first accumulator, said second accumulator, and said compressor being connected in series; a first oil return bypass for connecting said oil separator and a connection pipe between said first and second accumulators; and a second oil return bypass for connecting said first accumulator and a connection pipe between said second accumulator and said compressor.

Abstract: To eliminate a fear of electrolytic corrosion even in the case where a heat exchanger to be connected to the outside of the plate-type heat exchanger has a copper piping, and to prevent any damage from being given to the brazed portions of the plate-type heat exchanger at the time of joining pipes and to prevent faults from being generated in joined portions. An intermediate pipe made of a material in which the value of polarization potential becomes lower than that generated between a body of the plate-type heat exchanger and the copper piping is interposed between the plate-type heat exchanger body and the copper piping. Further, the plate-type heat exchanger body is disposed in a position out of a vertical line of a joined portion between the copper piping and the intermediate pipe.

Abstract: A method for manufacturing a heat transfer surface is disclosed wherein the surface of powder or string-shaped copper core material is coated with a coating material of a nickel compound or silver so as to form a coat treatment material which is deposited on a substrate. The coating material has a lower fusing point than the core material, and the coat treatment material is heated to a temperature between the fusing points of the core material and the coating material such that only the coating material is caused to fuse to the substrate so as to form a porous heat transfer material which exhibits improved bending strength.

Abstract: An apparatus for preventing lubricating oil from rising to the working spaces of a Stirling engine has a first and a second oil-absorbing member disposed within a cylindrical member in which a rod reciprocates. The first oil-absorbing member is secured to the rod with its outer periphery in sliding contact with the inner wall of the cylindrical member, and the second oil-absorbing member is secured to the cylindrical member with its inner periphery in sliding contact with the rod. A first baffle plate having a hole which is larger than the rod is secured to the cylindrical member immediately below and in intimate contact with the second oil-absorbing member. The first baffle plate makes the flow speed of gas through the second oil-absorbing member higher from above to below than from below to above. As a result, oil is continually blown downwards by a blast of accelerated gas and is returned to the crankcase of the engine.

Abstract: A heat exchanger for a Stirling engine has a domed cylinder which serves as a high-temperature cylinder and a regenerator housing. The domed cylinder has a smoothly-changing cross-sectional shape so that stress concentrations will not develop therein. A thin inner liner which is inserted into the domed cylinder divides the inside of the domed cylinder into an expansion space and a regenerator space. A cylindrical regenerator is coaxially disposed inside the regenerator space. A cylindrical cooler is coaxially disposed below the regenerator with its inner surface forming the outer periphery of the compression space of the engine. The expansion space and the regenerator space are connected with one another by a plurality of heater tubes which are secured to the domed cylinder.