Abstract: An electronic apparatus containing in a rack a plurality of electronic equipments each having heat generating electronic parts, and provided with fins for dispersing heat from the electronic equipment, involves a problem of low heat radiating efficiency.

Abstract: An electronic apparatus receiving therein a plurality of electronic equipments, each of which has heat generating electronic parts and which are spaced from one another, has caused a problem that amounts of an air flowing into wind paths between the respective electronic equipments involve scatter.

Abstract: A machining head of a laser machining apparatus comprises a main assist gas nozzle at the center portion of the machining head for supplying a main assist gas and one or more annular sub assist gas nozzles surrounding the main assist gas nozzle, whose jet outlet of the innermost diameter is larger or equal to the jet outlet of main assist gas. The jet outlet of the main assist gas nozzle is positioned at upstream of said jet outlets of the respective sub assist gas nozzle. According to the above construction, the jet gas pressure and the jet gas velocity vary continuously at the assist gas jet outlet and the jet gas pressure and flow velocity fluctuation of the main assist gas are increased.

Abstract: An air outlet has a plurality of vertical vortex generating structures 21 in a triangular shape arranged so as to be oriented at an angle &thgr; with respect to diffused air.

Abstract: A machining head of a laser machining apparatus comprises a main assist gas nozzle at the center portion of the machining head for supplying a main assist gas and one or more annular sub assist gas nozzles surrounding the main assist gas nozzle, whose jet outlet of the innermost diameter is larger or equal to the jet outlet of main assist gas. The jet outlet of the main assist gas nozzle is positioned at upstream of said jet outlets of the respective sub assist gas nozzle. According to the above construction, the jet gas pressure and the jet gas velocity vary continuously at the assist gas jet outlet and the jet gas pressure and flow velocity fluctuation of the main assist gas are increased.

Abstract: An air outlet has a plurality of vertical vortex generating structures 21 in a triangular shape arranged so as to be oriented at an angle .theta. with respect to diffused air.

Abstract: An opposed flow heat exchanger comprising partitions including a corrugated portion for forming passages in a wavefront direction, and flat portions for taking in or out air flows from a predetermined direction at opposite ends of the corrugated portion in the wavefront direction; and flat shape holding plates having a length in a direction of the passages which is not longer than a length of the partitions; wherein the partitions and the shape holding plates are alternately layered so that the corrugated portion of each of the partitions and the shape holding plates contact together, and the flat portion of each of the partitions faces to the flat portion of a partition adjacent thereto, thereby independently forming the passages through the partitions.

Abstract: A heat exchanger, in which an alternating flow of supply air and exhaust air are supplied in opposite directions between a plurality of stacked heat exchanging members, is characterized in that the heat exchanging members each is composed of a first paper member having a moisture permeability and corrugated in the width direction and having flat portions at the longitudinally opposite ends flattened under pressure, and a pair of second paper members having one end joined to the flat portions and the other end side extending flatly in the longitudinal direction to define a header defining portion for defining a header portion, so that the number of the parts can be decreased and the assembly can be made easier, whereby a heat exchanger with an improved productivity can be provided. A method for manufacturing a heat exchanger is also disclosed.

Abstract: Heat radiating fin plates in a curved shape are radially arranged on a heat radiating surface of a heat transfer plate, and a space is provided so as to be surrounded by inner edges of the heat radiating fin plates. The heat radiating fin plates have sidewalls formed with projections.

Abstract: A machining head of a laser machining apparatus for adjusting flow speed distribution includes a sub assist gas supply inlet; an annular partition for partitioning the inside of the sub assist gas nozzle toward axis direction; an annular flat board which contacts rotatably to the side surface of the down stream of the annular partition wall, and interrupts a part of gas supply inlet, and a part of which is notched; two partition plates which are mounted on both end portions of the annular flat board, partition the inside of the sub assist gas nozzle down stream of the annular partition wall, and rotate with the annular flat board; a driving device for driving the annular flat board; and a control apparatus for operating the driving device.

Abstract: A heat exchange apparatus comprising a heat transfer member; and at least one projecting blade which is arranged to confront the heat transfer member, and which carries out relative motion with respect to the heat transfer member; wherein a distance between the edge of the projecting at the side of the heat transfer member and a heat transfer surface of the heat transfer member is smaller than a value which corresponds to a rising point where an upward gradient of convective heat transfer coefficients rises as the distance decreases.

Abstract: A heat exchange apparatus comprising a heat transfer member; and at least one projecting blade which is arranged to confront the heat transfer member, and which carries out relative motion with respect to the heat transfer member; wherein a distance between the edge of the projecting blade at the side of the heat transfer member and a heat transfer surface of the heat transfer member is smaller than a value which corresponds to a rising point where an upward gradient of convective heat transfer coefficients rises as the distance decreases.