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Fujitsu General Limited patents


Recent patent applications related to Fujitsu General Limited. Fujitsu General Limited is listed as an Agent/Assignee. Note: Fujitsu General Limited may have other listings under different names/spellings. We're not affiliated with Fujitsu General Limited, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "F" | Fujitsu General Limited-related inventors


Rotary compressor and refrigeration cycle device

A rotary compressor includes: a closed upright cylindrical compressor housing including an upper portion provided with a discharge section of refrigerant and a body portion provided with an intake section of the refrigerant; a compression section disposed at a lower part in the compressor housing and configured to compress the refrigerant suctioned by the intake section to discharge the refrigerant from the discharge section; and a motor disposed at an upper part in the compressor housing and configured to drive the compression section. The motor has a rotor disposed on an inner side and a stator disposed on an outer side, the refrigerant is hfo1123 refrigerant or a refrigerant mixture containing the hfo1123 refrigerant, and an inner welded portion formed by welding using flux is provided within a projection area of the rotor at the upper portion of the compressor housing.. ... Fujitsu General Limited

Heat exchanger and refrigeration cycle device

A heat exchanger includes: a heat transfer pipe in which refrigerant flows; and a spiral groove formed at an inner peripheral surface of the heat transfer pipe. A height of an inner wall of the groove in a radial direction of the heat transfer pipe is equal to or greater than 0.1 [mm], and when a wetted edge length of the heat transfer pipe is s, an inclination angle between a pipe axis direction of the heat transfer pipe and a longitudinal direction of the groove in a section of the heat transfer pipe parallel with the pipe axis direction is —0, and a length of the heat transfer pipe is l, the inclination angle θ is an acute angle, and a wetted area s×l/cos θ of the heat transfer pipe satisfies s×l/cos θ≥0.5 [m2].. ... Fujitsu General Limited

Rotary compressor

In a rotary compressor, s1>s3, s2>s3, and s2′>s3′ are satisfied when a sectional area of a refrigerant path hole on a lower endplate is s1, a sectional area of the refrigerant path hole in a lower cylinder is s2, a sectional area of the refrigerant path hole on an intermediate partition plate is s3, an area in which a section of the refrigerant path hole on the lower end plate and a section of the refrigerant path hole in the lower cylinder overlap each other is s2′, and an area in which a section of the refrigerant path hole in the lower cylinder and a section of the refrigerant path hole on the intermediate partition plate overlap each other is s3′.. . ... Fujitsu General Limited

Rotary compressor

In a rotary compressor, a refrigerant path hole communicates with a lower discharge chamber concave portion while at least a part thereof overlaps the lower discharge chamber concave portion, is positioned between a lower vane groove and a first insertion hole in a lower cylinder, and is configured of a plurality of holes which are disposed between the upper vane groove and the first insertion hole in the upper cylinder, and a sectional area of a cross section which is closest to the lower vane groove and the upper vane groove of the plurality of holes is the smallest compared to the sectional area of the cross section of the other holes.. . ... Fujitsu General Limited

Rotary compressor

An upper piston of a rotary compressor is formed to satisfy 0.7×hcy1/1000≤δro≤1.2×hcy1/1000, cro1≤0.1, cro2≤0.1, and cro1×cro2≤0.007. Here, cro1 indicates a length (mm) of an upper side piston outer circumferential chamfer portion in a height direction, and cro2 indicates a length (mm) of the upper side piston outer circumferential chamfer portion in a normal line direction of a piston outer circumferential surface. ... Fujitsu General Limited

Compressor

A compressor includes a shaft, a motor portion, and a compressor portion. The motor portion rotates the shaft. ... Fujitsu General Limited

Axial fan and outdoor unit including the same

An axial fan includes: a cutout in a rear edge part of each of the plurality of blades, the rear edge part being opposite to a front edge part of the each of the plurality of blades in a rotational direction of the each of the plurality of blades, the cutout extending from the rear edge part toward the front edge part such that the cutout divides the rear edge part into an outer rear edge part and an inner rear edge part; a rib in a blade surface of the each of the plurality of blades, the rib extending from the hub toward an outer circumference of the each of the plurality of blades along the front edge part; and a first thickness-reduced part adjacent to an end of the rib, the end of the rib being closer to the outer circumference, the each of the plurality of blades being thinned in the first thickness-reduced part.. . ... Fujitsu General Limited

Axial fan and outdoor unit

An axial fan includes: a hub; a plurality of blades arranged in a circumferential direction of the hub; a cutout in a rear edge part of each of the plurality of blades, the cutout divides the rear edge part into an outer rear edge part and an inner rear edge part; a first groove part disposed in the outer rear edge part, the first groove part including a plurality of grooves extending toward the front edge part; and a second groove part disposed in the inner rear edge part, the second groove part including a plurality of grooves extending toward the front edge part, the plurality of grooves of the first groove part and the plurality of grooves of the second groove part having different shapes when viewed in a rotational axis direction of the hub.. . ... Fujitsu General Limited

Three-phase/single-phase matrix converter

A configuration for the object includes: a bidirectional switch circuit which turns on/off supply of input three-phase ac power to a load ld; and a control unit which performs virtual ac/dc conversion processing in which a plurality of interline voltage generation sections selecting two phases among the input three-phase ac power are obtained according to a plurality of modes classified according to a magnitude relationship between voltages of respective phases in the input three-phase ac power within a predetermined switching cycle and generates a switching pattern of the bidirectional switch circuit so as to perform virtual dc/ac conversion processing corresponding to the plurality of interline voltage generation sections from a second carrier waveform pattern according to the plurality of modes and a u-phase control signal and a v-phase control signal corresponding to a phase of an output side.. . ... Fujitsu General Limited

Rotary compressor

A rotary compressor includes a sealed longitudinal compressor housing which is provided with a discharge portion of a refrigerant at an upper portion thereof, is provided with an inlet portion of a refrigerant at a lower portion thereof, and in which lubricant oil is stored; a compressing unit which is disposed in the compressor housing, compresses a refrigerant sucked from the inlet portion and discharges the refrigerant from the discharge portion; a motor which is disposed in the compressor housing and drives the compressing unit via a rotation shaft; and an accumulator which is attached to a side portion of the compressor housing and is connected to the inlet portion of the refrigerant. When an inner diameter of a cylinder constituting the compressing unit is referred to as dc, a height of the cylinder is referred to as hc, and an eccentric amount of an eccentric portion of the rotation shaft is referred to as e, dc, hc, and e are set so that a value obtained by an expression (e+hc)·(dc−e)1/3/(e·hc)2/3 is less than 4.1.. ... Fujitsu General Limited

Rotary compressor

In a rotary compressor, a lower end plate cover is formed in a shape of a flat plate, and has a through hole that is provided to penetrate in the thickness direction of the lower end plate cover and that communicates with a communication groove. When a sectional area of the communication groove which passes through a center line of a rotation shaft, and is on a section along the rotation shaft direction is s1 [mm2], an area in which the through hole and the communication groove overlap each other on a plane orthogonal to the rotation shaft is s2 [mm2], and an excluding capacity of a lower cylinder chamber is v [cc], each of 0.10≦(s2/v)≦0.50, and 1.0≦(s2/s1)≦7.0 is satisfied.. ... Fujitsu General Limited

Air conditioner

An air conditioner includes: an outdoor unit; a plurality of indoor units respectively including indoor heat exchangers; expansion valves respectively provided to the plurality of indoor units, the expansion valves being configured to adjust flow rates of a refrigerant in the indoor heat exchangers; and a controller for executing a refrigerant amount balance control for adjusting opening degrees of the expansion valves so that operation state amounts, with which the indoor heat exchangers exert heat exchange amounts, of the plurality of indoor units become equal to each other.. . ... Fujitsu General Limited

Outdoor unit of air conditioner

There is provided an outdoor unit of an air conditioner which receives a load which is applied to a top panel using an entirety of a housing, and the top panel and a fan guard do not easily deform. A lower end of a bell mouth is fixed to a front beam and a rear beam of the housing, and an upper end of the bell mouth is caused to come into contact with a back face of the top panel to support the load which is applied to the top panel with the bell mouth.. ... Fujitsu General Limited

Outdoor unit of air conditioner

An outdoor unit of an air conditioner which is capable of increasing mechanical strength of a fan guard to suppress deformation of the fan guard, and further, is capable of preventing generation of a chattering sound is provided. A diameter of wire rods which configure a lateral rail portion of the fan guard is greater than a diameter of wire rods which configure a longitudinal rail portion of the fan guard, cross-sectional crank shaped fixing plates are provided on both left and right end portions of the lateral rail portion, and the fan guard is screwed to the top panel via the fixing plates.. ... Fujitsu General Limited

11/23/17 / #20170335848

Rotary compressor

In a rotary compressor, a lower end plate cover is formed in a flat plate shape, a lower discharge chamber concave portion is formed in a lower end plate to overlap a lower discharge hole side of a lower discharge valve accommodation concave portion, and the lower discharge chamber concave portion is formed in a fan-like range between a diametrical line passing through a center of a sub-bearing unit and a midpoint of a line segment connecting a center of the lower discharge hole and a center of a lower rivet to each other and a diametrical line opened by a pitch angle 90° in a direction of the lower discharge hole about the center of the sub-bearing unit. At least a portion of a refrigerant path hole overlaps the lower discharge chamber concave portion and is disposed at a position communicating with the lower discharge chamber concave portion.. ... Fujitsu General Limited

10/12/17 / #20170292520

Rotary compressor

A compressor includes: an annular cylinder; a rotation shaft which is rotated by the motor; a piston which revolves along an inner circumferential surface of the cylinder, and forms a cylinder chamber on the inside of the cylinder; a vane which protrudes to the inside of the cylinder chamber from a vane groove provided in the cylinder, and divides the cylinder chamber into an inlet chamber and a compression chamber by abutting against the piston; and an injection hole which injects a liquid refrigerant to the inside of the compression chamber. The center of the injection hole is disposed to be within a fan-like range of which a center angle is equal to or less than 40° toward a side opposite to a connection position between the compressor housing and the inlet unit from a center line of the vane groove in the circumferential direction of the rotation shaft.. ... Fujitsu General Limited

09/28/17 / #20170276135

Rotary compressor

A rotary compressor including a cylindrical compressor housing provided with an inlet unit of a refrigerant and a discharging unit of the refrigerant, a compressing unit which is disposed inside the compressor housing and includes a cylinder and a piston for compressing the refrigerant sucked in from the inlet portion, a rotation shaft provided with the piston of the compressing unit, and a motor which includes a cylindrical stator and a rotor that is provided on another end side of the rotation shaft and that rotates inside the stator, and which drives the compressing unit via the rotation shaft, in which an outer circumferential portion of the stator includes a concave portion and is fixed to an inner circumferential portion of the compressor housing in a transition fit state, and in which the compressor housing includes a weld portion which is joined to the concave portion of the stator.. . ... Fujitsu General Limited

08/31/17 / #20170248331

Outdoor unit of air conditioner

Provided is an outdoor unit of an air conditioner which has good assembly stability by more cheaply and easily increasing mechanical strength of a housing, and in which the cost thereof is further suppressed by reducing the number of components such as screws, as an outdoor unit of a large air conditioner including two blowers. The left front pillar and the right front pillar are fixed between the front beam and the base panel hung between the front ends of the left side panel and the right side panel, and the rear pillar is fixed between the rear beam and the base panel hung between the rear ends of the left side panel and the right side panel. ... Fujitsu General Limited

08/31/17 / #20170248330

Outdoor unit of air conditioner

Provided is an outdoor unit of an air conditioner capable of obtaining stable air blowing performance without enlarging a blower fan and decreasing the amount of air per unit area (wind velocity distribution) passing through the heat exchanger even if the capacity of the heat exchanger is enlarged by optimizing a relative arrangement and a configuration of a heat exchanger and a blower and effectively utilizing the wind of the blower which is conventionally wasted. The rotation shaft of the first blower is disposed closer to the center line in the lateral direction of the housing than the center line in a lateral direction of the left blower chamber, and the rotation shaft of the second blower is disposed closer to the center line in the lateral direction of the housing than the center line in a lateral direction of the right blower chamber.. ... Fujitsu General Limited

08/31/17 / #20170248327

Outdoor unit of air conditioner

Provided is an outdoor unit of an air conditioner capable of obtaining efficient air blowing performance by optimizing a length dimension of a heat exchanger and a relative position of a blower. A front end portion is disposed closer to the left side panel than a rotation shaft of the first blower, and a rear end portion is disposed closer to the right side panel than a rotation shaft of the first blower in the first heat exchanger, and a front end portion is disposed closer to the right side panel than a rotation shaft of the second blower, and a rear end portion is disposed closer to the left side panel than a rotation shaft of the second blower in the second heat exchanger.. ... Fujitsu General Limited

07/13/17 / #20170198943

Air conditioner

When a refrigerant amount balance control is executed, in indoor units where the refrigerant supercooling degree is lower than an average refrigerant supercooling degree, the refrigerant pressure on a downstream side of indoor expansion valves decreases since the degrees of opening of the valves are decreased. On the other hand, in an indoor unit where the refrigerant supercooling degree is higher than the average refrigerant supercooling degree, although the degrees of opening of the valves are made high, the refrigerant pressure on the downstream side of the valves decreases and this decreases the refrigerant pressure on the downstream side of the indoor expansion valve, so that the difference in pressure between on the upstream side and on the downstream side of the indoor expansion valve increases and the liquid refrigerant staying at an indoor heat exchanger of the indoor unit consequently flows out into a liquid pipe.. ... Fujitsu General Limited

06/22/17 / #20170175742

Rotary compressor

In a rotary compressor, a protruding portion which protrudes downward from a bottom end of a rotation shaft and in which an outer diameter is smaller than an outer diameter of a sub-bearing unit is formed on the sub-bearing unit which is provided on a lower end plate, a step portion is formed between the protruding portion and the sub-bearing unit, and a center hole of a lower end plate cover is caused to mate with the protruding portion and is caused to come into close contact with the step portion.. . ... Fujitsu General Limited

05/11/17 / #20170130721

Rotary compressor

A rotary compressor including an attachment leg which is fixed to a bottom portion of a compressor housing and includes three locking holes which are locking holes to which three corresponding elastic supporting members, which support the compressor housing, are locked and which are disposed to be separated from each other in a circumferential direction on an outside in a radial direction of the compressor housing, in which, of the three locking holes, a distance of a first locking hole which is disposed closest to an accumulator from a housing center, is greater than a distance of each of the other two locking holes from the housing center.. . ... Fujitsu General Limited

05/04/17 / #20170126080

Rotor and permanent magnet electric motor

A rotor, which is cylindrically formed of a magnetic body and in which a plurality of magnet embedding holes are annularly formed at predetermined intervals in a circumferential direction, plate-like permanent magnets being embedded in the magnet embedding holes, includes a flux barrier that is disposed toward an outer circumference of the rotor from an circumferential end of each of the magnet embedding holes, and a slit that is disposed to be adjacent to the flux barrier, in which the slit is a long hole extending in a direction of becoming distant from the flux barrier, from an inner circumferential side of the rotor toward an outer circumferential side thereof, and a notch portion is provided on the outer circumference of the rotor opposing the flux barrier in a diameter direction of the rotor.. . ... Fujitsu General Limited

03/16/17 / #20170077772

Rotor of electric motor for compressor

At least three axis direction through-holes arranged at equal intervals in the circumferential direction are provided in a rotor laminated steel plate and a rotor end plate. The rotor laminated steel plate and the rotor end plate are fixed with three rivets for passing through the axis direction through-holes. ... Fujitsu General Limited

03/16/17 / #20170074269

Rotary compressor

On a plane orthogonal to the rotation shaft, an upper muffler chamber has a plurality of flared portions that are flared from a center of a rotation shaft toward between penetrating bolts and a plurality of small-diameter portions that connect between the flared portions, are apart from penetrating bolts, and are formed on a center side of the rotation shaft from the penetrating bolts. A muffler outlet is provided in each flared portion. ... Fujitsu General Limited

01/19/17 / #20170018985

Insulator and brushless dc motor including the same

. . In an insulator to insulate teeth of a stator, which is a three-phase electric motor and which has nine teeth or more, and a conducting wire wound around the teeth, slits for parallel wire connection to be conducting wire extraction parts only in parallel wire connection, slits for serial wire connection to be conducting wire extraction parts only in serial wire connection, and shared slits to be conducting wire extraction parts in both of the serial wire connection and the parallel wire connection are provided.. . ... Fujitsu General Limited

01/05/17 / #20170003057

Rotary compressor

A rotary compressor includes a sealed vertical compressor housing, a compressing unit, and a motor. A refrigerant discharging unit is provided at an upper part and a refrigerant intake unit is provided at a lower part side surface in the sealed vertical compressor housing. ... Fujitsu General Limited








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