Abstract: A communication device having a communication module as data circuit-terminating equipment connecting to a wireless packet communication network, and a controller interposed between the communication module and a data terminal equipment. The controller controls communication performed by the data terminal equipment using the communication module. The controller extracts, from a communication message sent from the data terminal equipment to a first management server, identification information of the data terminal equipment, stores the extracted identification information in a storage, and transmits the extracted identification information to a second management server by using the communication module when communication is not performed between the data terminal equipment and the first management server.

Abstract: The present invention relates to a fluid machine. A pump integrated expander (29A) includes a pump unit (60) and an expansion unit (50). In the pump unit (60), a casing member (65) supports a gear pump (61), a rotating shaft (28) and a driven crank mechanism (81). In the expansion unit (50), a casing including a main body (51a) and a casing member (54) supports an expander (23) including a fixed scroll (51) and an orbiting scroll (52). The pump integrated expander (29A) is divided into the pump unit (60) and the expansion unit (50) by separating at the fitted portion of a tubular portion (65c) on the pump unit (60) side and a smaller inner diameter portion (54b) on the expansion unit (50) side and by pulling the eccentric bush (83) out of a drive bearing (56).

Abstract: Provided is an inverter-integrated electric compressor wherein the attachability of a coil component has been improved while reliability of a connection state at the electrical joints is ensured by simplifying a mechanism which electrically connects the coil component, such as one for removing electromagnetic noise, to a motor drive circuit.

Abstract: A compressor includes a cylinder block including cylinder bores and pistons within the cylinder bores. A front housing opposes a first cylinder block end face to form a crank chamber accommodating a piston driving mechanism. A valve plate opposes a second cylinder block end face and includes suction and discharge holes. A rear housing includes suction and discharge chambers and opposes the second cylinder block end face with the valve plate there between. Strap-shaped suction valves on the valve plate end face oppose the cylinder block, thereby opening and closing the suction holes at tip portions. Discharge valves on the valve plate end face oppose the rear housing to open and close the discharge holes. Through-bolts join the front housing, the crank chamber, the cylinder block, the valve plate, and the rear housing. The valve plate includes grooves extending from holes accommodating the through-bolts to portions abutting the suction valves.

Abstract: A wabble plate type variable displacement compressor has a wabble plate rotation preventing mechanism including an inner ring axially movable relative to a main shaft, an outer ring connected to the wobble plate, a plurality of balls placed between guide grooves of the inner and outer rings and performing power transmission, and a sleeve axially movably engaged with the inner ring, provided so as to be axially movable together with the inner ring. A shape differs between the axial cross-sectional profiles of substantially concave spherical surfaces formed respectively in the inner periphery of the outer ring and the outer periphery of the sleeve such that the closer to the axial opposite ends of the contact portion between both the surfaces the position is, the greater the clearance between these surfaces. Implementation of the wabble plate rotation preventing mechanism in such a compressor can provide excellent durability and silent performance.

Abstract: Problems to be Solved To provide is a motor control device capable of detecting a rotor position of a synchronous motor under a certain accuracy and a low processing load. Means for Solving the Problems The motor control device detects the rotor position ?m by directly finding a rotor position ?m from a rotor position expression (?m=?i???90°) containing, as a variable, a current electrical angle ?i from among a phase current peak value Ip and a phase current electrical angle ?i detected in a phase current peak value and electrical angle detection unit 19 and an induced voltage peak value Ep and an induced voltage electrical angle ?e detected in an induced voltage peak value and electrical angle detection unit 20, and containing, as a variable, a current phase ? capable of being selected using [a phase current peak value Ip] and [an induced voltage electrical angle ?e?a phase current electrical angle ?i] as parameters from a predefined data table.

Abstract: The present invention relates to a motor control device provided with the function of detecting the rotor position of a synchronous motor in a sensor-less fashion. The motor control device previously stores a current phase ? defined by the two parameters that are an induced voltage peak value Ep and the subtracted value (?e??i) obtained by subtracting an induced voltage electrical angle ?e from a current electrical angle ?i, and based on the actual detected Ep, ?i, and ?e, selects ? by referring to the ? previously stored, and calculates the rotor position ?m by subtracting the selected ? from the actual detected ?i. Then, in case of selecting ?, the actual detected Ep and ?e are corrected according to changes in the current flowing through the coil. As a result, a detection accuracy for the rotor position during a transition period is enhanced.

Abstract: Provided is an inverter-integrated electric compressor having high heat resistance, which is capable of suppressing thermal interference among a plurality of power devices. Specifically provided is an inverter-integrated electric compressor which comprises a built-in motor and a substrate provided with a motor drive circuit including an inverter, an electric component including the substrate being affixed in a housing space surrounded by a compressor housing, wherein a plurality of power semiconductor elements which constitute the motor drive circuit are disposed radially around a drive shaft of the motor in a plane crossing the drive shaft. For example, the planar shape of the power semiconductor element is formed into a rectangle, and a gap having a sectorial planar shape is formed between the power semiconductor elements adjacent to each other.

Abstract: Provided is an inverter control device that can detect momentary abnormality in a power-supply voltage for sure, and return quickly to regular state when the abnormality in the power-supply voltage has been settled. The inverter control device consists of a main power-supply (31); a sub power-supply (22) that converts electric power distributed from the main-power supply (31); a controller (21) that operates with a control power-supply supplied from the sub power-supply (22); a transistor (4) that makes the input signal of the controller (21) turn ON/OFF, by having the current between the emitter and collector made to turn ON/OFF; and a power-supply monitoring circuit (3) that is connected to the main power-supply (31) via at least a resistor (rD), and monitors the voltage of the main power-supply (31).

Abstract: A waste heat utilization device recovering waste heat produced by an internal combustion engine from a heat medium includes a Rankine cycle circuit including an evaporator, an expander, a condenser and a pump serially arranged in a circulation line along which a combustible working fluid circulates. A casing air-tightly encloses the Rankine cycle circuit to chemically inactivate the Rankine cycle circuit.

Abstract: A compressor incorporated with an oil separator having a separation chamber, which is placed adjacent to a discharge chamber, has a space formed in the entire inside of the separation chamber, separates oil-containing gas, being introduced, into gas and oil by centrifugal separation, allows the separated oil to drop downward, and upwardly extracts the separated gas, and also having a lower hole for introducing the separated oil into an oil storing chamber. The oil separator is formed as a joining structure of two compressor forming members, and a portion of the oil storing chamber, other than a portion where the lower hole is opened, is communicated with the separation chamber via a gas release passageway at least a part of which is formed between the two compressor forming members.

Abstract: A device controls power supplied from an inverter having a semiconductor switching element to an electric compressor having an external drive source or a built-in motor. The device includes: an apparatus for calculating a starting current value required for starting the compressor from the pressure at the discharge side circuit of the compressor; an apparatus for calculating a permitted current value of the semiconductor switching element from the temperature of the inverter installation portion; and an apparatus for comparing the calculated compressor starting current value to the permitted current value of the semiconductor switching element so as to determine whether to permit a start of the compressor.

Abstract: A compressor includes a compressing mechanism, a discharge chamber, a housing accommodating the compressing mechanism and the discharge chamber, a discharge port communicating with the discharge chamber through a discharge passage and also with an external refrigerant circuit, a muffler formed by an expanded space disposed on the discharge passage, and a check valve disposed on the discharge passage. The pressure loss caused by the discharge passage is less than that in the known compressor. The check valve is disposed in the muffler to open and close an inlet of the muffler, and the muffler is formed by the housing and a cover independent of and connected to the housing.

Abstract: A motor control device includes feed-forward control means for detecting a change amount of a predetermined monitoring target, which is used for changing the number of revolutions of a motor without depending on revolution number detecting means, and correcting the number of revolutions recognized by a controller.

Abstract: A vehicle air conditioning apparatus is provided to prevent a frost from being formed on a heat exchanger under the condition that the outdoor temperature is low. During a heating and dehumidifying operation, the third solenoid valve 25c is closed when outdoor temperature Tam is predetermined temperature T1 or lower, or when temperature Thex of the refrigerant flowing out of the outdoor heat exchanger 22 is a predetermined temperature T2 or lower and temperature Te detected by the cooled air temperature sensor 44 is temperature Tet-? or lower. By this means, during the heating and dehumidifying operation, when a frost is likely to be formed on the heat exchanger 14, it is possible to prevent the refrigerant from flowing into the heat exchanger 14, and to prevent a frost from being formed on the heat exchanger 14.

Abstract: Provided is an electric compressor whose manufacturing cost is reduced and in which a motor driving circuit can be positively protected. A temperature sensor is provided in the vicinity of a power semiconductor element whose temperature becomes highest among a plurality of power semiconductor elements and control of the number of revolutions of a motor is performed on the basis of temperatures detected by the temperature sensor, whereby it is possible to change the number of revolutions of the motor by using a temperature in the vicinity of a power semiconductor element in a position under the worst temperature conditions as a reference, and it becomes possible to positively protect an inverter circuit without the need for a plurality of temperature sensors.

Abstract: A vehicle air conditioning apparatus is provided that can extend the mileage of a vehicle by reducing the power consumed by the operation of a compressor and a heater. When a required quantity of heating Q_req is acquired, the minimum power sharing ratio between quantity of heat release Q_hpof a water-refrigerant heat exchanger 22 and quantity of heat release Q_htrof a water heater 32 is calculated, which allows the power consumption W_total to be minimized, and a compressor 21 and the water heater 32 is operated based on the result of the calculation.

Abstract: A heat exchanger includes a single refrigerant pipe (44) for introducing a refrigerant into a receiver tank (14) from a condenser header part (20, 26), and a mounting member (40) for mounting the receiver tank to a core (10). The mounting member has a refrigerant inlet passage (56) connecting the refrigerant pipe to the interior of the receiver tank, and a refrigerant outlet passage (58) connecting the interior of the receiver tank to a sub-cooler header part (22, 28).

Abstract: A compressor wherein a valve plate formed with a suction hole and a discharge hole is interposed between a cylinder head and a cylinder block and a discharge valve formed as a reed valve is provided relative to the discharge hole on the valve plate. The discharge hole is formed in a U-shape having a bottom part located at the tip side of the reed valve, and the reed valve is formed as a U-shape extending in correspondence to the U-shape of the discharge hole. The cross-sectional area of flow of discharge gas can be significantly increased to drastically reduce flow path resistance, and excessive compression may be suppressed to greatly improve the efficiency of the compressor.

Abstract: In a cylinder head 104 provided on a head side of a cylinder block 101 with a valve plate 103 interposed therebetween, a suction chamber 119 is formed on the center side and a discharge chamber 120 is formed so as to encircle the suction chamber 119. In the cylinder head 104, an oil storage chamber 132 for storing an oil separated from a discharged refrigerant by an oil separating portion (a separation pipe 130 etc.) is provided. The oil storage chamber 132 extends in the diametric direction of the cylinder head 104 integrally with the cylinder head 104 and has an open end at the outer face of the cylinder head 104, and the open end is occluded by an occluding member 134. Here, the oil storage chamber 132 has a portion bulging into the suction chamber 119.