Abstract: In a manufacturing method of a fin unit for a heat sink for dissipating a heat from a heat source, the fin unit includes a plurality of fins radially arranged about its center axis, and a fin supporting portion connecting inner ends of the fins and supporting the fins. First, metal is heated. The heated metal is extruded and/or drawn through a die to obtain a metal body. One of the die and the metal body obtained through the die is rotated relative to the other about a center axis of a die hole of the die. The metal body is then cut, thereby obtaining the fin unit.

Abstract: A medium storage apparatus writes data for stream type commands on a medium, and improves the reliability of the write data while maintaining the execution time of the commands. The apparatus has a buffer for storing the write data of the write stream type commands, a controller for sequentially writing the data of the buffer to the medium by a head, and a processing unit for skipping the writing of erred sectors for continuing the processing which normally ends if an error occurs, and writing the data to the skipped sector after command execution. By this, the error is corrected such that the medium is correctly read in the next and later read processing, while maintaining the write time specified by the command.

Abstract: A medium storage device reads device specific information from a medium to a memory and performs read/write operation to the medium, which allows receiving commands from a host even if a read error of the device specific information occurs. When an error occurs during the device specific information read processing of the medium storage device after power ON, the alternate data stored in the medium is developed so as to recover the power ON error artificially. For this alternate data, the data at factory shipment is saved in a ROM or a system area of a medium in advance, and is developed from here when necessary. Since commands can be received and executed, a disabled startup of the host system can be prevented.

Abstract: A compressor has a discharge passage, an oil separation mechanism, an oil supply passage, and a valve mechanism. The oil supply passage supplies the separated lubrication oil into an oil recovery region. The valve mechanism is formed in the oil supply passage and includes a valve chamber, a spool and an urging member. The spool separates the valve chamber into a first pressure sensing chamber and a second pressure sensing chamber. The amount of the lubrication oil supplied to the oil recovery region is adjusted in such a manner that as the pressure differential between the first and the second pressure sensing chambers increases, the spool slides in the valve chamber and the opening degree of the oil supply passage increases to the maximum and then decreases, and that when the compressor is stopped, the opening degree of the oil supply passage is minimized by the urging force of the urging member.

Abstract: A compressor connected to an external refrigerant circuit is disclosed. The compressor is provided with a housing, a passage forming member coupled to an outer surface of the housing, and a differential pressure type flow rate detector provided in the passage forming member. The flow rate detector obtains the pressure in an upstream passage and the pressure in a downstream passage to detect a refrigerant flow rate within the refrigerant passage. The flow rate detector is provided with an accommodation chamber, a partition body, a compression spring, and a spring seat defining a maximum stroke amount of the partition body. The spring seat exists closer to the passage forming member side than a partition surface comparting the housing and the passage forming member, and is in contact with the partition surface.

Abstract: The compressor has a differential pressure type flow rate detector that obtains the pressure in an upstream passage and the pressure in a downstream passage to detect a refrigerant flow rate within a refrigerant passage. The detector has an accommodation chamber, and a partition body slidably accommodated within the accommodation chamber. The partition body comparts the accommodation chamber into a high pressure chamber to which the pressure in the upstream passage is introduced, and a low pressure chamber to which the pressure in the downstream passage is introduced. The compressor has an oil separator having an oil introduction passage connected to the oil separating chamber and a high pressure introduction passage introducing the pressure in the upstream passage to the high pressure chamber. The oil introduction passage introduces the oil separated from the refrigerant by the oil separator to a pressure zone other than a discharge pressure zone.

Abstract: A heat sink for dissipating a heat from an object includes a plurality of fins. The fins are arranged radially about a center axis to be spaced away from one another, and extend outward in a radial direction substantially perpendicular to the center axis. Each fin is branched at least two different positions in the radial direction into at least three fin end portions spaced away from one another.

Abstract: To provide a malfunction diagnosing method and apparatus capable of reliably determining a malfunction even where the malfunction occurs in a common wire connecting a gas sensor and a control circuit for driving it. In a gas concentration measurement unit 1 having a sensor control circuit 50 which is connected to a sensor element 10 including an oxygen pump cell 14 and an oxygen concentration detection cell 24 and controls and drives this sensor element 10, a variation state of a terminal voltage at one connecting point (specifically, a Vs+ terminal) other than connecting points between electrodes facing a measurement chamber of each cell 14 and 24 and a common wire 24 is detected by a malfunction detection circuit 53 and an arithmetic processor 54. Based on this variation state of the terminal voltage, diagnosis of malfunction in the common wire 42 is executed. When the common wire 42 is broken, the terminal voltage at the Vs+ terminal varies with oscillations.

Abstract: A variable displacement compressor includes a housing assembly. A displacement control structure for the variable displacement compressor includes a passage forming member, a flat partition and a displacement control valve. The passage forming member is connected to an exterior surface of the housing assembly for forming a refrigerant passage for allowing the refrigerant to be discharged out from the compressor to an external refrigerant circuit. The flat partition is interposed between the passage forming member and the housing assembly. A throttle penetrates through the partition, which divides the refrigerant passage into an upstream passage and a downstream passage. The displacement control valve is provided in the passage forming member. The displacement control valve senses pressure of refrigerant in the upstream passage and pressure of the refrigerant in the downstream passage to control flow rate of the refrigerant flowing through a supply passage.

Abstract: A structure for sensing refrigerant flow rate in a compressor. The structure includes a passage forming member, a restriction hole, a differential pressure-type flow rate sensor, and a partition plate. The compressor includes a housing connected to an external refrigerant circuit via a refrigerant passage. The passage forming member is connected to an outer surface of the housing and forms a part of the refrigerant passage. The restriction hole divides the refrigerant passage into an upstream passage and a downstream passage. The upstream passage is formed in either the housing or the passage forming member. The sensor is provided in the passage forming member and detects pressure in the upstream passage and pressure in the downstream passage to sense flow rate of refrigerant in the refrigerant passage. The partition plate is disposed between the housing and the passage forming member. The restriction hole is formed in the partition plate to extend through the partition plate.

Abstract: A prober which tests an object to be tested under temperature control is provided. This prober includes a stage base, Z stage, X-Y stage having a frame structure, substrate fixing mechanism arranged on the X-Y stage, a probe card arranged to oppose the substrate fixing mechanism, and a probing stage fixed on the Z stage and arranged in the frame structure of the X-Y stage such that its axis coincides with an extension line vertically extending from the probe center of the probe card. The probing stage includes a probing elevating mechanism, and a temperature controller to heat and cool the object to be tested. The probing stage supports the substrate of the object to be tested from the bottom surface, and controls the temperature of the object to be tested.

Abstract: A gas sensor system includes a gas sensor capable of producing an output signal responsive to the concentration of a specific gas component in measurement gas, a gas concentration determination device that makes electrical connections to the gas sensor and determines the concentration of the specific gas component according to the output signal of the gas sensor, a failure detection device that detects a potential failure in any one of the electrical connections, a sensor temperature determination device that judges whether the gas sensor has been cooled to a predetermined temperature or lower with reference to a sensor temperature parameter and a failure identification device that, when the gas sensor has been cooled to the predetermined temperature or lower, outputs a diagnosis signal to the gas sensor, measures potentials of the electrical connections under the diagnosis signal and identifies in which of the electrical connections the potential failure is occurring based on the measured potentials.

Abstract: A refrigerant gas compressor includes a cylinder block formed with plural cylinder bores, a first housing disposed at the one end of the cylinder block, a second housing disposed at the other end of the cylinder block, a drive shaft supported by the cylinder block and one of the housings, a crank chamber formed in one of the housings, a suction chamber and a discharge chamber formed in one of the housings, a valve plate assembly disposed between the cylinder block and at least one of the housings, a stepped portion formed adjacent to the valve plate assembly to receive a part of the valve plate assembly. A storage chamber is provided for reserving therein oil separated from refrigerant gas. An oil groove is formed by the stepped portion and the valve plate assembly and connecting the storage chamber with one of the crank chamber and the suction chamber.

Abstract: A variable displacement compressor comprises a flange, a movable body, and a detection sensor. The flange is joined to a housing and forms a flange passage for connecting a refrigerant passage and an external refrigerant circuit. The movable body is movably disposed in the flange, is movable according to a flow rate of refrigerant gas in the flange passage, and has a magnet. The detection sensor is fixed to or in the flange for detecting magnetic flux density of the magnet. The flow rate of the refrigerant gas is detected based on the magnetic flux density detected by the detection sensor. The flange is attachable to and detachable from the housing in a state where the flange is provided with the movable body and the detection sensor.

Abstract: A flow meter for a variable displacement compressor comprises a movable body operable to move by differential pressure, a magnet provided in the movable body, a magnetic sensor for detecting change of magnetic flux density of the magnet, a flow passage for refrigerant gas which is discharged from cylinder bores to flow therethrough, a sealed chamber connected perpendicularly to the flow passage and accommodating therein the movable body, an urging member for urging the movable body into the flow passage, a clearance formed between a movable body and an inner wall surface of the flow passage, a by-pass passage opened and closed as the movable body is moved in an axial direction of the movable body, and a communication passage for introducing into the sealed chamber the refrigerant gas in a downstream flow passage of the flow passage which is located downstream of the movable body.

Abstract: The present invention provides a supporting unit of microfluid system having a smaller restriction on the number of the steps and capacity of the reaction and analysis that can be produced easily, and a microfluid-system supporting unit allowing mounting of complicated fluid circuits densely. The present invention relates to a microfluid-system supporting unit, comprising a first supporting plate and at least one hollow filament constituting the channel of the microfluid system, wherein the hollow filament is placed on the first supporting plate in any shape and a particular internal region of the hollow filament has a function.

Abstract: NOx sensor element of oxygen-ion conductive solid electrolyte body 15; flow passage (7, 5, 8, 6) provided within the body for introducing analyte gas; oxygen partial pressure detection cell 3; first oxygen pump cell 1 for controlling oxygen partial pressure of the gas in the flow passage; and nitrogen oxides detection cell 2 for decomposing nitrogen oxides in the gas having a controlled oxygen partial pressure and for causing dissociated oxygen to migrate through the solid electrolyte body (see FIG. 1). Operational amplifier 22b is connected between the nitrogen oxides detection cell 2 and a 12 V battery power source to generate a voltage applied to the nitrogen oxides detection cell 2; and diode 22d connected to a point between the operational amplifier 22b and the nitrogen oxides detection cell. The diode clamps the voltage to an activation voltage higher than the measurement voltage during activation.

Abstract: A refrigerant compressor forms a refrigerant circulation circuit with an external refrigerant circuit, and includes an oil separation structure. The oil separation structure includes a plurality of separation chambers for centrifugally separating oil from refrigerant gas, an oil storage chamber for storing the oil separated in the plurality of separation chambers, a connection passage and an oil passage. The plurality of separation chambers and the oil storage chamber are recessed within thickness of a circumferential wall of a housing component so as to be juxtaposed in a transverse direction passing across the housing component. The connection passage connects the plurality of separation chambers, and extends in the transverse direction along the refrigerant gas flow in a discharge path. The oil passage connects the oil storage chamber and the separation chambers, and extends in the transverse direction.

Abstract: A muffler forming member defines a muffler chamber. Refrigerant discharged from a cylinder bore is sent to the muffler chamber. The muffler forming member is coupled to a circumferential surface of a housing of a compressor. An oil separation chamber is defined in a discharge pressure zone of the compressor. The oil separation chamber separates the oil from the refrigerant discharged from the cylinder bore. The oil separation chamber extends into both the muffler forming member and the housing. The oil separation chamber has a refrigerant inlet through which the refrigerant flows into the oil separation chamber. The refrigerant inlet is formed in the muffler forming member. Therefore, the oil separation chamber is prolonged in the direction from the muffler forming member toward the housing, thereby improving the oil separation performance.