Abstract: Provided is a piping system for an air conditioner installed in a vehicle that can achieve appropriate weight reduction while ensuring appropriate pressure resistance as the piping system as a whole. A circulation path that connects component devices of an air conditioner (8) in an annular shape to circulate a refrigerant (C) is formed by each pipe body extending between the component devices. At least one of the pipe bodies includes: a resin hose (2) embedded with a non-metal reinforcing material (3f) or a resin pipe (5) embedded with a non-metal reinforcing material (6f), and the resin pipe bodies (2), (5) are employed in 50% or more of a total length of each of the pipe bodies constituting the circulation path.

Abstract: Provided is a piping system for an air conditioner installed in a vehicle that can achieve appropriate weight reduction while ensuring appropriate pressure resistance as the piping system as a whole. A circulation path that connects component devices of an air conditioner (8) in an annular shape to circulate a refrigerant (C) is formed by each pipe body extending between the component devices. At least one of the pipe bodies includes: a resin hose (2) embedded with a non-metal reinforcing material (3f) or a resin pipe (5) embedded with a non-metal reinforcing material (6f), and the resin pipe bodies (2), (5) are employed in 50% or more of a total length of each of the pipe bodies constituting the circulation path.

Abstract: An impeller includes: a cylinder that includes a circular plate-shaped circular plate and a peripheral wall that extends from an outer peripheral edge of the circular plate along a rotation shaft of the impeller; and a blade mounted to an outer peripheral surface of the peripheral wall, the blade being configured to send air. The circular plate has a circular plate opening at a center, the circular plate opening penetrating the circular plate along the rotation shaft, and a sidewall opening is formed at the peripheral wall, the sidewall opening penetrating the peripheral wall along a direction different from a direction parallel to the rotation shaft.

Abstract: A housing of a fan motor according to the invention includes: board members provided at an interval in a rotational axis direction of a fan; a coupling portion which couples the board members to each other; a protrusion portion which is protruded toward a space other than an air course from the coupling portion, the space being between the board members other than the air courses; and a fixing portion which fixes a terminal that is provided in the protrusion portion and is connected to a wiring from a power source that supplies electricity to a motor. Other member, which crosses in an extending direction of the terminal from the protrusion portion to an edge portion of the board member, is not provided.

Abstract: An axial flow fan includes: an impeller, a hub of which is attached to a rotation shaft of a rotation driving device; and a venturi casing that surrounds an outer circumference in a radial direction of the impeller and includes a suction port and a discharge port facing each other in an axial direction of the rotation shaft. A positive pressure surface of a plurality of blades integrally attached to the hub includes a plurality of step portions that is curved so as to comply with a curved shape of a front edge portion in a rotation direction of the blades.

Abstract: An impeller includes: a cylinder that includes a circular plate-shaped circular plate and a peripheral wall that extends from an outer peripheral edge of the circular plate along a rotation shaft of the impeller; and a blade mounted to an outer peripheral surface of the peripheral wall, the blade being configured to send air. The circular plate has a circular plate opening at a center, the circular plate opening penetrating the circular plate along the rotation shaft, and a sidewall opening is formed at the peripheral wall, the sidewall opening penetrating the peripheral wall along a direction different from a direction parallel to the rotation shaft.

Abstract: A control device of a fan motor includes: a voltage sensor that detects a voltage applied to a fan motor; a switching portion that selectively connects to each of coils of the fan motor and a rectifier circuit; and a switching control portion that reduces a duty ratio of a driving pulse applied to the switching portion if the voltage detected by the voltage sensor exceeds a threshold.

Abstract: A press working apparatus for processing a heated workpiece is provided with a base part which is relatively movable so as to advance and retreat with respect to the workpiece, a pad provided on the base part and configured to hold the workpiece, a working tool provided on the base part to pass through the pad and adapted to process the workpiece, and a support member configured to movably support the working tool in a direction perpendicular to an advance and retreat direction of the base part.

Abstract: A press-die is provided with a lower die and an upper die. The lower die includes a drawing punch, a blank holder, and a cushion part. The upper die includes a drawing die part, and a trimming part. The blank holder includes a first holder part disposed to face to an end portion of the drawing die part, and a second holder part disposed to face to the trimming part. The second holder part has a drawing support portion that supports a first portion of a bottom surface of the first holder part. The drawing punch has a trimming support portion that supports a second portion of the bottom surface of the first holder part. The first holder part has a lower trimming blade at an outer edge thereof. The trimming part has an upper trimming blade at an inner edge thereof.

Abstract: A control device of a fan motor includes: a voltage sensor that detects a voltage applied to a fan motor; a switching portion that selectively connects to each of coils of the fan motor and a rectifier circuit; and a switching control portion that reduces a duty ratio of a driving pulse applied to the switching portion if the voltage detected by the voltage sensor exceeds a threshold.

Abstract: A housing of a fan motor according to the invention includes: board members provided at an interval in a rotational axis direction of a fan; a coupling portion which couples the board members to each other; a protrusion portion which is protruded toward a space other than an air course from the coupling portion, the space being between the board members other than the air courses; and a fixing portion which fixes a terminal that is provided in the protrusion portion and is connected to a wiring from a power source that supplies electricity to a motor. Other member, which crosses in an extending direction of the terminal from the protrusion portion to an edge portion of the board member, is not provided.

Abstract: A lead wire engaging structure includes a first engaging portion and a second engaging portion. One end of the first engaging portion and one end of the second engaging portion are integrally provided at a first mounting portion integrally provided at a second casing wall portion. The first engaging portion forms a first gap between the first engaging portion and the second casing wall portion, and engages four lead wires in cooperation with the second casing wall portion. The first gap allows the four lead wires to pass therethrough. The second engaging portion forms a second gap between the second engaging portion and the first engaging portion. The second gap allows the four lead wires to pass therethrough. The other end portion of the first engaging portion and the other end portion of the second engaging portion are coupled to each other by a coupling portion.

Abstract: A casing of a centrifugal fan includes a suction port forming wall portion, an opposed wall portion opposed to the suction port forming wall portion, and a sidewall portion connecting the suction port forming wall portion and the opposed wall portion. A tongue portion is provided at the sidewall portion. The tongue portion projects into an air passage in the vicinity of a discharge port to form a narrowed air passage portion within the air passage. A leading end surface of the tongue portion is shaped such that the width of the leading end surface increases from the suction port forming wall portion, where the suction port is formed, to the opposed wall portion. The tongue portion is shaped such that the projecting length of the tongue portion into the air passage continuously decreases from the suction port forming wall portion to the opposed wall portion.

Abstract: A press-die is provided with a lower die and an upper die. The lower die includes a drawing punch, a blank holder, and a cushion part. The upper die includes a drawing die part, and a trimming part. The blank holder includes a first holder part disposed to face to an end portion of the drawing die part, and a second holder part disposed to face to the trimming part. The second holder part has a drawing support portion that supports a first portion of a bottom surface of the first holder part. The drawing punch has a trimming support portion that supports a second portion of the bottom surface of the first holder part. The first holder part has a lower trimming blade at an outer edge thereof. The trimming part has an upper trimming blade at an inner edge thereof.

Abstract: A press working method for processing a heated workpiece includes a punching process of punching the heated workpiece using a working tool in a state of urging the workpiece by a pad, a retreating process of retreating the working tool from the punched workpiece, and a holding process of holding the punched workpiece in a state of being urged by the pad after the retreating process.

Abstract: A press working apparatus for processing a heated workpiece is provided with a base part which is relatively movable so as to advance and retreat with respect to the workpiece, a pad provided on the base part and configured to hold the workpiece, a working tool provided on the base part to pass through the pad and adapted to process the workpiece, and a support member configured to movably support the working tool in a direction perpendicular to an advance and retreat direction of the base part.

Abstract: A fan system with enhanced air flow-static pressure characteristics and reduced fan noise compared to the related art is provided. The number of duct blades of a duct is the same as the number of stationary blades of an axial flow fan located in front of the duct, and the duct blades correspond to the stationary blades respectively. An end surface of a rear end portion of each stationary blade and an end surface of a front portion of a duct blade corresponding to the stationary blade have the same shape, and they align together and contact each other to form one composite stationary blade, with a discharge port of each axial flow fan communicating with an inlet port of a duct housing located behind the axial flow fan.