Abstract: A method of manufacturing a rotor core, the method including laminating first laminated steel plates in an axial direction. The first laminated steel plates each include a plurality of flake portions arranged in a circumferential direction with gaps between each other and a plurality of protrusions protruding radially outward from an outer side surface of a base portion and each having at least a portion located in the gap between the flake portions. The method further includes fixing the base portions to each other and fixing the flake portions to each other. The method further includes removing the protrusions of the laminated steel plates radially outward.

Abstract: A rotor includes a rotor core including laminated thin plate cores. A single thin plate core includes an inner plate portion defining a portion of an inner core portion and outer plate portions defining a portion of an outer core portion. At least some of the laminated thin plate cores include a connecting portion. A number of connecting portion is one or a plurality, and, when the number of connecting portions is a plurality, the connecting portions at positions other than both left and right sides of each other in a circumferential direction, and, in plan view, the thin plate core includes the connecting portion at a position different from that of a connecting portion in another thin plate core adjacent in an axial direction.

Abstract: A method of manufacturing a rotor core, the method including laminating first laminated steel plates in an axial direction. The first laminated steel plates each include a plurality of flake portions arranged in a circumferential direction with gaps between each other and a plurality of protrusions protruding radially outward from an outer side surface of a base portion and each having at least a portion located in the gap between the flake portions. The method further includes fixing the base portions to each other and fixing the flake portions to each other. The method further includes removing the protrusions of the laminated steel plates radially outward.

Abstract: A rotor includes a rotor core including laminated thin plate cores. A single thin plate core includes an inner plate portion defining a portion of an inner core portion and outer plate portions defining a portion of an outer core portion. At least some of the laminated thin plate cores include a connecting portion. A number of connecting portion is one or a plurality, and, when the number of connecting portions is a plurality, the connecting portions at positions other than both left and right sides of each other in a circumferential direction, and, in plan view, the thin plate core includes the connecting portion at a position different from that of a connecting portion in another thin plate core adjacent in an axial direction.

Abstract: A heat transfer device that can improve temperature uniformity along the entire length of a pipe line housed in the heat transfer device is provided. The heat transfer device transferring heat to the pipe line in which a fluid flows includes: a heat transfer block of high heat conductivity, surrounding the pipe line, a heat pipe formed in the heat transfer block, along an extending direction of the pipe line, and a heater applying heat to the heat pipe. The heat transfer block includes a plurality of divided blocks dividable along the extending direction of the pipe line. There is provided a proximity portion where the heat transfer block is in proximate to the pipe line at both ends of the heat transfer block in the extending direction of the pipe line.

Abstract: A heating device which transfers heat isothermally to an object to be heated. The heating device includes: a block and a base plate which surround a pipe; a first heat insulating cover which covers an outer periphery of the block and the base plate and forms a first heat insulating layer; and a second heat insulating cover which covers an outer periphery of the first heat insulating cover and forms a second heat insulating layer. The first heat insulating cover includes first heat insulating covers fixed to the block and the base plate respectively. The second heat insulating cover includes second heat insulating covers fixed to each of the first heat insulating covers respectively. The heating device further includes snap locks which detachably fixes the second heat insulating covers.

Abstract: A heat transfer device that can improve temperature uniformity along the entire length of a pipe line housed in the heat transfer device is provided. The heat transfer device transferring heat to the pipe line in which a fluid flows includes: a heat transfer block of high heat conductivity, surrounding the pipe line, a heat pipe formed in the heat transfer block, along an extending direction of the pipe line, and a heater applying heat to the heat pipe. The heat transfer block includes a plurality of divided blocks dividable along the extending direction of the pipe line. There is provided a proximity portion where the heat transfer block is in proximate to the pipe line at both ends of the heat transfer block in the extending direction of the pipe line.

Abstract: A heating device which transfers heat isothermally to an object to be heated. The heating device includes: a block and a base plate which surround a pipe; a first heat insulating cover which covers an outer periphery of the block and the base plate and forms a first heat insulating layer; and a second heat insulating cover which covers an outer periphery of the first heat insulating cover and forms a second heat insulating layer. The first heat insulating cover includes first heat insulating covers fixed to the block and the base plate respectively. The second heat insulating cover includes second heat insulating covers fixed to each of the first heat insulating covers respectively. The heating device further includes snap locks which detachably fixes the second heat insulating covers.

Abstract: An isothermal heating apparatus includes a plate including formed therein a heat pipe circuit in which working fluid is charged, and a heating mechanism heating the working fluid. The heat pipe circuit includes a header portion at which the working fluid is heated and evaporated and a plurality of branch portions in which vapor produced by vaporization of the working fluid exchanges heat with the plate and condensates, the branch portions branching off from the header portion. The heating mechanism is provided on an evaporating surface side of the header portion with which the working fluid is in contact when the heating mechanism heats the working fluid. The isothermal heating apparatus can achieve isothermal heating of a heat-treatment subject and size reduction of the apparatus.

Abstract: A negative ion generating apparatus includes a ground electrode having a nozzle portion and surrounding a discharge electrode at a position spaced from the ground electrode, a power supply for supplying a negative high voltage to the discharge electrode, a ventilator for drawing air from an inlet and blowing the air between the electrodes. A high voltage induces corona discharges between the electrodes. The ionized negative ion particles produced in the discharge are blown out of an outlet. Alternatively, the ground electrode is a cylinder with a smaller downstream cross-section. The discharge electrode increases the velocity of gas flow and the high speed gas is ionized near the discharge electrode, increasing the rate of generation of negative ion particles. The discharge electrode may include needle electrodes to increase the rate of generation of the negative ion particles.