Abstract: To provide a high-voltage apparatus control device capable of judging the connection state of a connector and discharging residual charge in a short time. A control device 1 controls an electric compressor and is provided with an interlock loop 4 annexed to a connector 9 for connecting the electric compressor to an HV battery 17. The control device 1 detects connection/disconnection of the connector 9 on the basis of the state of the interlock loop 4 and forcibly discharges residual charge in an internal smoothing capacitor 14 when disconnection of the connector 9 is detected.
Abstract: [Problem] To reduce imbalance among all movable components of a scroll compressor including a drive shaft and components fixed or connected to the drive shaft. In a scroll compressor 10, a shaft balancer 31 integrated with a drive shaft 30 includes a first weight 33 disposed on the opposite side from an eccentric pin 71 with respect to a center line CL0 of the drive shaft 30, and a bushing balancer 721 integrated with an eccentric bush 72 includes a second weight 723 disposed on the radially outer side of the eccentric bush 72 and on the opposite side from a center line CL1 of the eccentric pin 71 with respect to a center line CL2 of the eccentric bush 72. In a view from the axial direction of the drive shaft 30, the second weight 723 is symmetric with respect to a virtual line passing through the center of the drive shaft 30 and the center of the eccentric bush 72, and the first weight 33 is asymmetric with respect to the virtual line.
Abstract: A vehicle air conditioning apparatus including: a refrigerant circuit includes: a compressor to compress refrigerant; a heat absorbing device to absorb heat from air to be supplied to a vehicle compartment; and a temperature-adjusted subject heat exchanger; a device temperature adjustment circuit connected to the refrigerant circuit via the temperature-adjusted subject heat exchanger, and configured to adjust a temperature of a temperature-adjusted subject mounted in a vehicle by the temperature-adjusted subject heat exchanger; and a controller configured to control the refrigerant circuit and the device temperature adjustment circuit.
Abstract: Reduction of a rotational moment that occurs in an orbiting scroll is suppressed. A scroll compressor 10 includes: a fixed scroll 51; an orbiting scroll 52; an anti-rotation mechanism 300; and a back pressure chamber H5. A spiral orbiting wrap 522 of the orbiting scroll 52 is meshed with a spiral fixed wrap 512 of the fixed scroll 51. A first compression chamber C1 is formed by an inner wall surface 522a of the orbiting wrap 522 and an outer wall surface 512b of the fixed wrap 512. A second compression chamber C2 is formed by an inner wall surface 512a of the fixed wrap 512 and an outer wall surface 522b of the orbiting wrap 522. The orbiting base plate 521 of the orbiting scroll 52 includes a first through hole 701 capable of communicating the first compression chamber C1 with the back pressure chamber H5 and a second through hole 702 capable of communicating the second compression chamber C2 with the back pressure chamber H5.
Abstract: To suppress reduced rotational moments that occur at a movable scroll. A scroll compressor (1) includes a fixed scroll (2), a movable scroll (3), and an anti-rotation mechanism (30). A spiral movable wrap (3b) of the movable scroll (3) meshes with a spiral fixed wrap (2b) of the fixed scroll (2). A first compression chamber (C1) is formed by an inner wall surface (3b1) of the movable wrap (3b) and an outer wall surface (2b2) of the fixed wrap (2b). A second compression chamber (C2) is formed by an inner wall surface (2b1) of the fixed wrap (2b) and an outer wall surface (3b2) of the movable wrap (3b). After a winding terminal end (3f) of the movable wrap (3b) contacts the outer wall surface (2b2) of the fixed wrap (2b) and the first compression chamber (C1) is thereby closed, a winding terminal end (2f) of the fixed wrap (2b) contacts the outer wall surface (3b2) of the movable wrap (3b) and the second compression chamber (C2) is thereby closed.
Abstract: A power conversion device is provided which is capable of balancing impedance relatively easily and suppressing noise caused by a common mode current when a three-phase AC output is applied to drive a motor.
November 17, 2021
January 11, 2024
SANDEN CORPORATION, KYUSHU INSTITUTE OF TECHNOLOGY
Kohei TAKADA, Koji KOBAYASHI, Tohlu MATSUSHIMA
Abstract: Lubricant is satisfactorily supplied to a bearing that supports an eccentric bush. A scroll compressor (100) includes a fixed scroll (122) fixed to a housing (140), an orbiting scroll (124) that orbits with respect to the fixed scroll, and a conversion mechanism (300) that mutually converts a rotary motion of a drive shaft (166) and an orbiting motion of the orbiting scroll. The converting mechanism includes an eccentric shaft (260) that is provided on an end surface of the drive shaft and is eccentric with respect to the drive shaft, an eccentric bush (270) having a through hole (271) into which the eccentric shaft is fitted, and a bearing (280) that is press-fitted into a boss portion (250) formed on the orbiting scroll and supports an outer peripheral surface (272) of the eccentric bush. A lubricant supply passage (350) for supplying lubricant to the bearing is penetratingly formed in the eccentric bush.
Abstract: [Problem] A scroll compressor is provided which is capable of effectively reducing a pressure loss in a pathway extending from a discharge space to a discharge port. [Solution] The scroll compressor includes a discharge space 27 formed in a compressing mechanism cover 9 of a housing 11, a discharge hole 26 which is formed in a fixed scroll 21 and discharges a compressed refrigerant to the discharge space, a discharge port 51 which discharges the refrigerant to the outside of the housing, a relief passage 71 which communicates the discharge space and the discharge port with each other, and a differential pressure valve 74 which is provided in the relief passage and opens in accordance with a pressure difference between the discharge space and the discharge port. The relief passage opens in the discharge space above the discharge hole.
Abstract: The vehicle air conditioning device includes a compressor, a radiator, an outdoor heat exchanger, and an air conditioning controller, and a cabin is, air conditioned with power supplied from a battery. The air conditioning controller can perform air conditioning operation that causes a refrigerant from the compressor to radiate heat in the radiator, decompresses the refrigerant, causes the refrigerant to absorb heat in the outdoor heat exchanger so as to heat the cabin, and defrosting operation that causes the refrigerant from the compressor to radiate heat in the outdoor heat exchanger so as to defrost the outdoor heat exchanger, and determines whether it is possible to perform the defrosting operation on the basis of outside humidity.
Abstract: An inverter device is provided which is based on a discontinuous modulation method and makes it possible to further reduce common mode noise. A control device L includes a phase voltage command operation unit 33 which calculates a continuous modulation voltage command value, an inter-line modulation operation unit 34 which calculates a discontinuous modulation voltage command value which fixes an ON/OFF state of a switching element of one phase of an inverter circuit 28 and modulates an ON/OFF state of switching elements of the other two phases, and a PWM signal generation unit 36 which performs PWM control on the inverter circuit. The control device synchronizes switching timings of the switching elements of the two phases in which the ON/OFF state is modulated, and cancels out a change in a phase voltage applied to a motor 8 by a change in another phase voltage.
Abstract: There is provided an inverter-integrated electric compressor which makes it possible to effectively suppress noise caused by a common mode current while achieving a size reduction. The inverter-integrated electric compressor includes an inverter device 3 which has upper and lower arm switching elements 13 and 16 and applies a three-phase AC output to a motor M. The inverter-integrated electric compressor injuries a control board which controls the switching of the upper and lower arm switching elements 13 and 16, and a bus bar assembly 22 provided to establish wiring among a battery 24, the control board, the upper and lower arm switching elements 13 to 18, and the motor M. A normal mode coil 40, a three-phase common mode coil 41, a ferrite core 42, reflux capacitors 43 and 44, and a snubber circuit 52 are arranged in the bus bar assembly 22.
November 17, 2021
December 14, 2023
Kohei TAKADA, Koji KOBAYASHI, Atsuhiro TADENUMA
Abstract: Provided is a variable displacement compressor that is directed to cost reduction and productivity enhancement of a second control valve that adjusts an opening degree of a discharge passage for discharging a refrigerant in a controlled pressure chamber to a suction chamber. The variable displacement compressor includes the second control valve (400) configured to decrease an opening degree of the discharge passage to a minimum value when a first end surface (421a) of a valve body (420) accommodated in a valve chamber (410) comes into contact with a first end wall surface (411) of the valve chamber (410) to close a second port (432) and a third port (433), and configured to increase the opening degree of the discharge passage to a maximum value when the first end surface (421a) of the valve body (420) separates from the first end wall surface (411) of the valve chamber (410) to open the second port (432) and the third port (433).
Abstract: A vehicle air conditioning apparatus 1 installed between a part under a seat and a floor of a vehicle includes a blower unit 2 including a blower, and a heat exchanger unit 3 including a heat exchanger. The blower unit and the heat exchanger unit are connected with one another to form an air flow path along the floor of the vehicle. The blower unit is detachably connected with the heat exchanger unit in a direction crossing the air flow path and being along the floor of the vehicle.
Abstract: Provided is an electric compressor that can ensure necessary stiffness for stacked members including a supporting plate and a control board, without increasing the number of components. An inverter circuit portion of an inverter-equipped electric compressor includes busbars 6a (61, 62, and 63) that are each formed by a thin plate member made of metal and that each constitutes part of the wiring of the inverter circuit portion, and includes a plate-like supporting plate 6b that is formed by a resin member molded integrally with the busbars 6a. Each of the busbars 6a (61, 62, and 63) has an embedded portion (a U-phase embedded portion 611, a V-phase embedded portion 621, or a W-phase embedded portion 631) that is embedded in the supporting plate 6b.
Abstract: A heat management system includes: a refrigerant circuit; a high-temperature heat medium circuit through which heat medium is heated to a high temperature by heat released from the refrigerant, and circulated; a low-temperature heat medium circuit through which heat medium is cooled to a low temperature by absorbing heat into the refrigerant, and circulated; a temperature adjustment heat exchanger to adjust a temperature of a heat management subject; a heat medium mixer connected to an upstream side of the temperature adjustment heat exchanger to mix high-temperature heat medium and low-temperature heat medium at a ratio depending on a target temperature of the heat management subject; and a branch connected to a downstream side of the temperature adjustment heat exchanger to return the heat medium having gone through the temperature adjustment heat exchanger to the high-temperature heat medium circuit and the low-temperature heat medium circuit.
Abstract: A vehicle air-conditioning apparatus heat pump system configured so that an excessive increase in the temperature (superheat degree) of refrigerant discharged from a compressor can be prevented in air-heating operation. The heat pump system (HP) includes a compressor (C) and an indoor heat exchanger (HXC2) on a refrigerant circuit (RC). A first branched flow path (BC1) on which a first expansion mechanism (EX1) with an adjustable opening degree and a first heat absorption heat exchanger (HXA1) are arranged in series and a second branched flow path (BC2) on which a second expansion mechanism (EX2) with an adjustable opening degree and a second heat absorption heat exchanger (HXA2) are arranged in series, where the first branched flow path (BC1) and the second branched flow path (BC2) are arranged in parallel on the refrigerant circuit extending from the indoor heat exchanger to the compressor.
Abstract: A vehicle air conditioning device executes an air conditioning operation for heating inside of a cabin by causing a refrigerant discharged from a compressor 2 to dissipate heat in a radiator 4, decompressing the refrigerant, and then causing the refrigerant to absorb heat in an outdoor heat exchanger 7, and includes an equipment temperature adjusting device 61 capable of adjusting, using the refrigerant, the temperature of a battery 55 and the temperature of a traveling motor 65, which is a temperature-adjusted object other than the battery, the battery 55 and the traveling motor 65 being mounted on a vehicle. An air conditioning controller has a heating/waste heat recovery mode for cooling the traveling motor 65 without cooling the battery with the refrigerant by controlling the equipment temperature adjusting device 61 in the air conditioning operation for heating the inside of the cabin.
Abstract: It is an object to provide an inverter device capable of appropriately protecting power semiconductor elements and further realizing an optimal operation considering a withstand voltage. The inverter device includes a junction temperature estimate calculating unit 32 which adds a temperature rise value ?T obtained from a loss P of power semiconductor elements 16U to 17W to a temperature Tth detected by a temperature sensor 22 to estimate a junction temperature Tj. When the junction temperature Tj is estimated, the junction temperature estimate calculating unit 32 performs a correction in the direction of excluding an influence of heat generation of other electronic components other than the power semiconductor elements 16U to 17W, and a wiring pattern of a control board 11 on a temperature sensor 22.
Abstract: [Problem] A scroll compressor is provided which effectively suppresses the occurrence of localized contact caused by deformation of a fixed scroll or a movable scroll due to the influence of a compressive reaction force or thermal expansion and shortens a break-in time. [Solution] Laps 24 and 32 of a fixed scroll 21 and a movable scroll 22 are constituted to have a plurality of step portions between a winding end portion at an outermost periphery and a winding start portion at an innermost periphery and decrease stepwise in height toward the winding start portion from the winding end portion. The position and height of each step portion are set so that when the spiral laps 24 and 32 are expanded on a predetermined plane, a base point of each step portion is placed on a predetermined arc drawn on the plane.
Abstract: To provide a vehicle air conditioning apparatus capable of smoothly performing temperature adjustment of a battery and a temperature-adjusted object other than the battery that are mounted on a vehicle. A vehicle air conditioning apparatus includes an equipment temperature adjusting device 61 for circulating a heating medium to a battery 55 and a traveling motor 65 to adjust the temperature of the battery 55 and the temperature of the traveling motor 65. The equipment temperature adjusting device includes circulating pumps 62, 63, and 87 for circulating the heating medium to the battery and the temperature-adjusted object, a refrigerant-heating medium heat exchanger 64 for exchanging heat between a refrigerant and the heating medium, an air-heating medium heat exchanger 67 for exchanging heat between outdoor air and the heating medium, and three-way valves 81 to 83 for controlling circulation of the heating medium to the battery and the traveling motor.