Abstract: A method for manufacturing a compressor scroll that appropriately impinges cavitation bubbles on target regions of a scroll. The method includes the step of water jet peening by jetting cavitation bubbles generated underwater by a water jet at a first side of an end plate (13A) of the scroll (13), with a center (P1, P2, P3) of the cavitation bubbles being offset from a center (O) of the spiral shape of a wall portion (13B) on the end plate (13A) and the step portion (13Aa) and the stepped portion (13Ba) positioned at an outer peripheral portion of the cavitation bubbles (C).

Abstract: An object is to provide a motor-driven compressor capable of reducing cost required when a failure occurs in part of components configuring an inverter device. A power substrate assembly 50 is removably fixed to a housing body 10 in an inverter accommodation chamber 13, and a control substrate assembly 70 and a filter circuit assembly 90 are removably fixed to a cover 30. Therefore, when the cover 30 is removed from the housing body 10, the power substrate assembly 50, the control substrate assembly 70, and the filter circuit assembly 90 can be independently removed from the housing body 10 or the cover 30, and new power substrate assembly 50, control substrate assembly 70, and filter circuit assembly 90 can be independently mounted on the housing body 10 or the cover 30.

Abstract: An air conditioning apparatus for a vehicle includes a refrigerant heater 41 that is provided between an internal evaporator 8 and a suction side of an electric compressor 20 to be in parallel with an external evaporator 32, and heats a refrigerant which is suctioned into the electric compressor 20; and an air conditioning control apparatus 50 that determines whether the external evaporator 32 is frosted. While the air conditioning apparatus for a vehicle operates in a heating mode, when the air conditioning control apparatus 50 determines that the external evaporator 32 is frosted, a supply of the refrigerant subject to the heat exchange in an internal condenser 9 to the external evaporator 32 is stopped, and the refrigerant is supplied to the refrigerant heater 41, is heated and then, is suctioned into the electric compressor 20.

Abstract: A heat pump vehicle air conditioning system passes hot gas to a condenser and a vaporizer for the vehicle cabin exterior. Even with low outside air temperature, it can efficiently defrost using the cooling cycle. The system includes a cabin-interior condenser downstream of a cabin-interior vaporizer within an HVAC unit connected via refrigerant switching means to a cooling cycle. Cooling is accomplished by a compressor, cabin-exterior condenser, first decompression unit with on-off valve function, the cabin-interior vaporizer, and an accumulator. A cabin-exterior vaporizer disposed outside of the vehicle cabin is connected with a second decompression unit via an on-off valve function and to the exit-side liquid refrigerant pipe of the cabin-exterior condenser. A bypass circuit having a third decompression unit with on-off function is connected between the accumulator and the exit-side liquid refrigerant pipe of the cabin-exterior condenser.

Abstract: An objective of the present invention is to provide a heat exchanger and a heat pump system which are capable of reducing the amount of a refrigerant that accumulates in an outdoor heat exchanger during heating operation, and of decreasing the appropriate amount of the refrigerant during heating operation. A vehicle-external heat exchanger is provided with a hollow first header, a hollow second header provided facing the first header, and a plurality of tubes provided between the first header and the second header and communicating with the first header and the second header. The first header is provided with a partition plate that divides the interior of the first header. The first header is provided with a first opening formed on a partition plate side between the upper end of the first header and the partition plate.

Abstract: The inverter-integrated electric compressor integrally incorporates an inverter device, and comprises a UVW busbar that conducts three-phase alternating current power converted by an inverter circuit on a circuit board to a glass terminal that penetrates an inverter housing section. The UVW busbar being configured of three long thin plate-shaped conductive material busbars, one end of each being provided with a connector terminal that is connected to the glass terminal, are the three conductive material busbars being housed in and integrated with a resin case. A section of each of the conductive material busbars in at least one location in the length direction thereof is adhered and fixed to the resin case side, using adhesive.

Abstract: A power conversion circuit board (1) is a circuit board on which a power conversion circuit configured to convert a direct current into an alternating current is mounted. A low-voltage circuit (10b) to which a low voltage is applied and a high-voltage circuit (10a) to which a high voltage is applied are separately disposed in different areas on the same circuit board surface. Furthermore, part of wiring of the high-voltage circuit (10a) is formed on the circuit board surface, and the other wiring is constituted by a bus bar provided at a predetermined distance from the circuit board surface.

Abstract: An electric compressor comprises: a boost converter configured to boost a voltage output from a direct current power supply; an inverter configured to convert the power boosted by the boost converter to an alternating current power; and a motor configured to rotate the electric compressor using the AC power output from the inverter. In the electric compressor, the boost converter and the inverter are provided on the same circuit board, housed in the same inverter case, and cooled by a coolant flowing into the electric compressor. The electric compressor is thereby obtained in which the device size can be prevented from increasing even when the boost converter configured to boost a low voltage from the DC power supply is installed.

Abstract: A centrifugal blower comprises: an impeller (2) provided with blades (12); a casing (3) that houses the impeller (2), surrounds the impeller (2) on an outer side of the impeller (2) in a radial direction of the impeller (2) to form a spiral flow passage (C1) through which air (AR) can flow, and is provided with a nose section (30) forming a start point (S) of the spiral flow passage (C1) and an end point (E) of the spiral flow passage (C1) where one turn of the spiral flow passage (C1) from the start point (S) terminates; a drive unit (4) that rotates the impeller (2) about the center axis (O) of the impeller (2); and a vane (5) that is provided on the bottom plate (22) of the casing (3), divides the spiral flow passage (C1) in the radial direction of the impeller (2), and extends along a circumferential direction of the impeller (2). The rear edge (6) of the vane (5) is located upstream from the nose section (30) in a primary flow direction (DI) of the spiral flow passage (C1).

Abstract: Provided is an inverter-integrated electric compressor which has improved assembly properties and assembly precision, and improved productivity. In this inverter-integrated electric compressor, a P-N terminal is provided on the inverter device main substrate, and a power source-side cable can be connected to the P-N terminal by inserting a connector provided at one end; by arranging and mounting multiple high-voltage electric components on the back of the main substrate in the area where the P-N terminal is arranged, a filter circuit is provided on the main substrate. The multiple high-voltage electric components are integrally coupled via fitting units provided on the housing cases of one another and are arranged in a prescribed position on the back of the main substrate with a positioning means provided on one of the housing cases.

Abstract: An inverter-integrated electric compressor for which an inverter device is integrally incorporated, with a main circuit board being housed while the four corners thereof are supported by boss parts at locations above high-voltage electrical components and semiconductor switching elements. The multiple high-voltage electrical components are arranged in parallel along one side of the main circuit board at one side of an inverter housing part, with one side of the main circuit board being supported from below by the upper surface of these components. The multiple semiconductor switching elements are arranged in parallel along the other side opposing the one side of the main circuit board, at the other side of the inverter housing part, with the other side of the main circuit board being supported from below by multiple lead terminals extending upwards.

Abstract: The purpose of the present invention is to improve responsiveness to short-circuit detection and rapidly cut off power supply to a load when a short circuit occurs. When a short circuit occurs, voltage exceeding the reference voltage of a comparison circuit is inputted as an input signal from a voltage output circuit, and a high signal is outputted from the comparison circuit. An FET is turned on by the output of the comparison circuit changing to the high signal. Consequently, an electric charge stored between the gate and emitter of an IGBT is discharged through a resistor, gate voltage decreases, and thereby the IGBT is turned off. The high signal of the comparison signal is held for a predetermined period by a holding circuit, and the IGBT is maintained in the off state over this period.

Abstract: A power conversion circuit board is a board on which a power conversion circuit which converts direct current to alternating current is mounted. A low voltage circuit to which a low voltage is applied and a high voltage circuit to which a high voltage is applied are separately disposed in different areas on the same board surface. Further, in the high voltage circuit, a part of a wiring is formed on the board surface, and another wiring includes a bus bar which is provided with a predetermined distance from the board surface.

Abstract: An electric compressor motor housing is provided with: a motor housing main body (8), the interior of which is a cylindrical space for internally equipping a motor, and in which a plurality of refrigerant passages are formed around the cylindrical space, in the direction of the motor axis; an inverter accommodating portion (17) provided in an upper portion of the outer periphery of the motor housing main body (8); compressor attachment feet (19) provided in a plurality of locations in upper and lower portions of the outer periphery of the motor housing main body (8); and a refrigerant intake port (16) provided on a side surface toward the rear end of the motor housing main body (8); wherein one or more lines of ribs (24) are provided on the outer peripheral side surface of the motor housing main body (8), protruding outward and extending in the vertical direction.

Abstract: A power conversion circuit board (1) is a board on which a power conversion circuit which converts direct current to alternating current is mounted. A low voltage circuit (10b) to which a low voltage is applied and a high voltage circuit (10a) to which a high voltage is applied are separately disposed in different areas on the same board surface. Further, the high voltage circuit (10a) includes a bus bar in which a part of a wiring is formed on the board surface and another wiring is provided with a predetermined distance from the board surface.

Abstract: Provided is a damper opening/closing mechanism of a vehicle air-conditioning device, the damper opening/closing mechanism being configured such that a pin (28) of a damper lever (26) is fitted in a cam groove (24) of a link plate (22) rotatably driven by a stepping motor and that a damper (19) is opened/closed through the damper lever (26) rotated by rotation of the link plate (22). One end portion of the cam groove (24) for reference positioning of the stepping motor is in such a shape that a connection surface (32) not contacting an outer peripheral surface of the pin (28) connects between the point of contact of the outer periphery of the pin (28) with one end surface of the cam groove (24) and the point with a side wall surface (24A) of the cam groove (24) when the damper (19) is in a closed state.

Abstract: A scroll fluid machine includes a pair of a fixed scroll (15) and an orbiting scroll (16). The scroll fluid machine has an one-side stepped scroll structure in which a stepped part (16E) is provided only at a predetermined position on a tooth bottom surface (16D) of a involute spiral wrap (16B) of one of the fixed scroll (15) and the orbiting scroll (16) in a spiral direction, and a stepped part (15E) corresponding to the stepped part (16E) on the tooth bottom surface (16D) is provided only at a predetermined position on a tooth top surface (15C) of a involute spiral wrap (15B) of the other scroll in a spiral direction. The stepped part (16E) on the tooth bottom surface (16D) is provided at a position on an inner side of a spiral end position (16F) of the involute spiral wrap (16B) at intake closure by an involute angle of n radians in the spiral direction or at a position on an outer side of the inner-side position.

Abstract: This electric compressor includes a compressor which rotates around an axis to compress a fluid, a motor which rotatably drives the compressor around the axis, and a control unit having a first component and a second component and controlling current supply to the motor during driving using the first component and the second component. An allowable current when the first component and the second component are exposed to the same temperature is set to be smaller in the second component than in the first component. The second component is disposed at a place in which cooling capability is greater than that of the first component so that allowable power of the second component at rated use is set to be greater than an allowable power of the first component.

Abstract: In a scroll compressor that forms two suction volume parts by engaging paired fixed scroll and turning scroll with each other while scroll laps respectively erected on end plates of the fixed scroll and the turning scroll are opposed to each other and driving the turning scroll to revolve around the fixed scroll, out of the two suction volume parts, one of the suction volume parts that is formed close to a suction port provided in a housing is made larger than the other suction volume part.

Abstract: The present invention is provided with: an evaporator (6) in which a compressed refrigerant is vaporized; an expansion valve expanding the refrigerant before the refrigerant flows into the evaporator (6); refrigerant pipes (26, 27) that connect the evaporator (6) and the expansion valve to each other; and a unit case (3) housing the evaporator (6), the expansion valve, and the refrigerant pipes (26, 27), and including an air flow channel (4) for passing air through the evaporator (6). A refrigerant pipe housing chamber (31) is disposed in the unit case (3), and housing the refrigerant pipes (26, 27). The refrigerant pipe housing chamber (31) is partitioned while being isolated from the housing section for the evaporator (6) and the air flow channel (4). The outer circumferential surfaces of the refrigerant pipes (26, 27) are separated from the inner wall surface of the refrigerant pipe housing chamber (31).