Abstract: Disclosed is a wobble plate type variable displacement compressor that uses a constant velocity universal joint mechanism, which comprises an inner ring and an outer ring, balls that are held between guide grooves of the inner ring and the outer ring to transmit power, wherein a wobble plate is connected and fixed to the outer ring. In the compressor, the connecting structure for the outer ring and the wobble plate is formed by providing a plurality of concave portions arranged in a circumferential direction on one member, by plastically deforming the other member partially at locations corresponding to the concave portions such that it fits into the concave portions, and by fixing both members to each other in the axial direction and in the rotational direction by means of the plastic deformation.

Abstract: A motor control device that can improve stability of sensorless control of a permanent magnetic synchronous motor. Rotor position detection (10) includes motor parameter correction (30) for correcting a parameter (winding resistance of a coil, a magnetic flux amount of a permanent magnet), which is a machine constant of a motor, in order to eliminate an induced voltage difference between a detected induced voltage peak value and a detected estimated induced voltage peak value. The rotor position is detected on the basis of the corrected parameter.

Abstract: A displacement control system (A) of a variable displacement compressor sets a target for pressure in an intake chamber or a crank chamber, on the basis of a detected evaporator-outlet air temperature and a target for evaporator-outlet air temperature. The pressure of a refrigerant in a high-pressure section is detected, and a regulating current is supplied to a solenoid (316) of a displacement control valve, on the basis of the pressure of the refrigerant in the high-pressure section and the target for pressure.

Abstract: This variable displacement compressor comprises: a housing; a piston; a drive shaft rotatably supported by the housing; a rotor that rotates in unison with the drive shaft; a swash plate that rotates in synchronism with the rotation of the rotor connected via a connecting means; a conversion mechanism that converts the rotation of the swash plate into a reciprocating motion of the piston; and a pressure control valve that is capable of controlling the internal pressure of a crank chamber. The variable displacement compressor is characterized in that: the connecting means directly or indirectly connects a first arm projecting from the rotor and a second arm projecting from the swash plate; and the drive shaft is eccentrically inserted into a through-hole that is perforated through the swash plate.

Abstract: Heating device includes: heater (2) with heating portion (6) generating heat by energization; housing (4) contains the heating portion and forms passage (18) for a heating medium between the housing and the heating portion; temperature detection means (26) detects, in the passage, temperature (T) inside the housing due to heat of the heating medium and the heating portion; and energization controlling means (40) for turning energization of the heater on/off depending on the temperature detected inside the housing. Energization of the heater is turned off to put the heater in an energization standby state if temperature detected inside the housing is equal to or greater than a first specified threshold (TS1), and is turned off to put the heater in an energization complete stop state if the temperature detected inside the housing in the energization standby state is equal to or greater than a second specified threshold (TS2).

Abstract: In order to perform overheating protection of a controller for water-heating heaters 3A and 38 for in-vehicle heating, an energization circuit for a heater 3 (3A, 38) includes IGBTs 11 and 12 as switching devices that are disposed therein to be in series with the heater 3, and a first temperature sensor (first thermistor) 21 which measures temperature of these IGBTs 11,12. A comparator 25 is provided to transmit a signal when the temperature of the IGBTs 11,12 is equal to or greater than a predetermined temperature. Then, the IGBTs 1112 can be forcibly turned OFF via the IGBT driver 13 in response to a signal from the comparator 25 without a microprocessor 14 intervening therebetween.

Abstract: A motor control device has an overcurrent test unit to send a first test voltage Vt1 lower than a reference voltage Vref for overcurrent determination and a second test voltage Vt2 not lower than the reference voltage Vref to an overcurrent determination unit when a synchronous motor is not rotated. The motor control device determines that an abnormality occurs in the overcurrent detection unit when the overcurrent determination unit determines that the first test voltage Vt1 causes an overcurrent on the basis of a comparison result, or the second test voltage Vt2 causes no overcurrent on the basis of the comparison result.

Abstract: In a swash plate type variable capacity compressor that changes a stroke of a piston by controlling the pressure of a crank chamber (6), lubrication oil contained in refrigerant gas is maximally prevented from being circulated outside the compressor. Some of discharged refrigerant gas in a discharge chamber (22) flows into the crank chamber (6) through a communication passage (25) (25a and 25b) and a control valve (27), while some of the discharged refrigerant gas flows out to a suction chamber (21) from the crank chamber (6) through a second communication passage (26) and an orifice (28), and the pressure of the crank chamber (6) is controlled through a balance between an inflow amount and an outflow amount. Oil storage chamber (30) extends downstream of the control valve (27) on the first communication passage (25) to separate oil and store the separated oil. Oil return passage (31) returns the oil stored in the oil storage chamber (30) to the crank chamber (6).

Abstract: Disclosed is a wobble plate type variable displacement compressor that uses a constant velocity universal joint mechanism, which comprises an inner ring and an outer ring, balls that are held between guide grooves of the inner ring and the outer ring to transmit power, wherein a wobble plate is connected and fixed to the outer ring. In the compressor, the wobble plate is provided with a cylindrical part which extends in the axial direction of a swash plate, and in the relative rotation structure between the swash plate, and the wobble plate and the outer ring, the swash plate is supported to be able to relatively rotate only in relation to the wobble plate via a bearing interposed at least between the cylindrical part and the inner diameter portion of the swash plate, without being supported to be able to rotate relative to the outer ring.

Abstract: A fluid machine includes: a first shaft; a compressor/expander fluid machine; a planetary gear mechanism having a sun gear connected to a second shaft rotating in synchronization with the compressor/expander fluid machine, a ring gear connected to the first shaft, a planetary gear, and a planetary carrier; a first clutch that locks/releases the planetary carrier and one of the ring gear and the sun gear; a second clutch that locks/releases the planetary carrier and the housing; a clutch control unit that controls locking/releasing of the first and second clutches depending on whether the compressor/expander fluid machine operates as an expander or a compressor.

Abstract: Cooling performance is secured by reducing a compression loss when a high-pressure gas refrigerant is allowed to flow without heat exchange on cooling in a vehicle interior heat exchanger. In the vehicle interior heat exchanger, an upstream header and a downstream header are communicated and connected with the same end side of the refrigerant circulation tubes of an upstream tube group and a downstream tube group where the refrigerant circulation tubes are stacked. Internal spaces of the upstream header and the downstream header are communicated and connected with each other via communication holes in the boss portions of the connecting member. In the vehicle interior heat exchanger, the total opening area of the communication holes is set such that the percentage thereof, with respect to the total opening area of the channel on the uppermost stream side of the upstream tube group, is in the range of 38% to 93%.

Abstract: Provided is a fluid machine which can be produced to have an increased weld strength and an increased reliability, at a reduced production cost. A first and a second shells (78, 80), each having a rim and a sealing portion constituting part of the rim, are butted together with the rims (78a, 80a) held together to form a groove (82) and with the sealing portions (96, 98) in contact with each other, and joined together by a weld (84) formed in the groove over the entire length of the groove to be separated from the sealing portions by a space (100).

Abstract: A waste heat utilization device (2) for an internal combustion engine has a Rankine cycle (8) that recovers waste heat from an internal combustion engine (4), a generator (30) that is rotationally driven by an expander (14) and converts a rotational drive force into electric power, a converter (32) that controls the rotational speed of the expander (14) through the generator (30), refrigerant-condition detecting means (22, 24, 26, 28) that detects the pressure and temperature of a refrigerant passing through the expander (14), and a controller (34) that calculates pressure ratio Rp of the refrigerant in the immediate upstream and downstream of the expander (14) and specific heat ratio K of the refrigerant passing through the expander (14) on the basis of the pressure and temperature of the refrigerant, which have been detected by the refrigerant-condition detecting means (22, 24, 26, 28), calculates a preset pressure ratio Rps of the pressure ratio Rp by multiplying predetermined volume ratio Rv of the expand

Abstract: A Rankine circuit (40) includes, as a plurality of heat exchangers, an EGR cooler (36) of an EGR circuit and an exhaust gas heat exchanger (41) associated with an exhaust passage. The EGR cooler and the exhaust gas heat exchanger are arranged such that the EGR cooler is located upstream of the exhaust gas heat exchanger as viewed in the flowing direction of a working fluid in the Rankine circuit. The amount of heat transferred from EGR gas to the working fluid in the EGR cooler is controlled by a control unit (60) so that the temperature of the EGR gas detected by an EGR gas temperature detector (39) may fall within a predetermined temperature range (e.g., 150° C. to 200° C.).

Abstract: To provide a scroll-type expander having a relatively simple structure, small energy loss, and high durability and reliability. A pump-integrated expander 27 includes an expansion unit 50 configured as a scroll-type expander. In the expansion unit 50, a working fluid passage 51e extending from a suction port 51c open to the outside to an inlet 51d open to an expansion chamber 54 is formed in a base 51a of a fixed scroll 51. A working fluid supplied from the outside is guided to the expansion chamber 54 by the working fluid passage 51e. In order to receive a thrust force acting on an orbiting scroll 53 and to prevent the rotation of the orbiting scroll 53, a ball-coupling anti-rotation mechanism 56 using balls as rolling members is disposed between a stepped face 52c of an expander housing 52 and a base 53a of the orbiting scroll 53.

Abstract: A motor control device according to the present invention includes: a boost converter circuit 30 that boosts a direct-current voltage; an inverter 40 that generates a drive pulse for a motor 50 from the direct-current voltage of the boost converter circuit 30; and a control section 60 that presets a set value Id_hold obtained by multiplying a set value Id_max by an intermediate current threshold coefficient ?, controls a pulse width of the drive pulse of the inverter 40 based on a speed deviation, controls a d-axis current in the motor 50 based on the speed deviation so that the pulse width of the drive pulse of the inverter 40 does not exceed a threshold value, and controls the direct-current voltage of the boost converter circuit 30 based on the speed deviation so that the d-axis current in the motor 50 does not exceed the set value Id_hold.

Abstract: An electric compressor which compresses a coolant by driving a compression mechanism with a motor which is drive controlled by a drive circuit, said compressor being characterized by having a lead pin connected to a current output section of the drive circuit, and a connector which, by being mounted on the lead pin, can provide electrical continuity between the current output section of the drive circuit and a current input section of the motor, said connector being provided with a connector terminal which contacts the lead pin at the time of mounting on the lead pin, a connector housing which houses the connector terminal, a vacuum flow path that communicates the inside of the connector housing with the outside thereof, and a sealing member which provides a seal between the connector housing and the vacuum flow path.

Abstract: In a vehicle air conditioning apparatus, during a cooling operation, and a cooling and dehumidifying operation, a refrigerant flows through an outdoor heat exchanger, flows through a supercooling radiator, and then flows into a radiator to absorb heat. During a heating operation, the refrigerant flows through a heat exchanger and then is sucked into a compressor without passing through the supercooling radiator. During a first heating and dehumidifying operation, the refrigerant flows through another radiator, flows through the supercooling radiator, and then flows into another heat exchanger to absorb heat.

Abstract: [Object of the Invention] An object of the present invention is to provide a reciprocation compressor comprising an extraction passage connecting a crank chamber with an inlet chamber, an aperture disposed in the extraction passage and a filter capturing foreign matters flowing from the crank chamber to the inlet chamber, wherein the foreign matters captured by the filter is restrained from returning to the crank chamber even if reverse flow of refrigerant from the inlet chamber to the crank chamber is generated, and the filter does not restrict design specifications of other members of the compressor.

Abstract: A vehicle air conditioning apparatus includes an outdoor expansion valve controller configured to control an evaporating temperature of a refrigerant in a heat exchanger by regulating an opening of an outdoor expansion valve during a heating and dehumidifying operation, an evaporating temperature control valve provided in a refrigerant flow passage to an output side of the heat exchanger from which the refrigerant is discharged, and configured to control the evaporating temperature of the refrigerant in the heat exchanger by regulating an amount of the refrigerant flowing through the refrigerant flow passage, a temperature detector configured to detect a temperature of the refrigerant in the heat exchanger, and a control changer configured to change control of the evaporating temperature of the refrigerant in the heat exchanger from by regulating an opening of the outdoor expansion valve to by regulating an opening of the evaporating temperature control valve.