Kabushiki Kaisha Toyota Jidoshokki

Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Tokyu Co., Ltd.

Kabushiki Kaisha Toyota Chuo Kenkyusho

Masakazu Obayashi

Naofumi Kimura

Yasuhiro Kondoh

Kazunori Yoshida

Akira Nakamoto

Masakatsu Kuroishi

Fumitaka Yoshizumi

Takahiro Moroi

Hajime Kurita

Yoshio Kimoto

Masakazu Hashimoto

Satoshi Koumura

Kazuhiro Nomura

Yasushi Suzuki

Takayuki Inoue

Katsuji Abe

Masaki Ota

Yusuke Yamazaki

Hiroyuki Gennami

Nobuaki Hoshino

Akio Saiki

Shinichi Sato

Noritaka Nishimori

Akihiro Nakashima

Etsuko Hori

Masami Ohno

Masahiro Hamanaka

Hirouki Gennami

A compressor has suction reed valves each of which includes a fixation portion fixed to the valve base plate, a basal portion that extends from the fixation portion and is separable from the plate, and a valve flap extending from the basal portion toward the distal end to selectively open and close the suction port. Each suction port has a shape elongated in the width direction, which is orthogonal to the longitudinal direction. The width of the basal portion is greater than that of the suction port. Each valve flap includes an opening-closing portion facing the corresponding suction port and stoppers, which project from the ends in the width direction. The side edges in the width direction are continuous from the stoppers to the basal portion to gradually approach the suction port. The cylinder block has pairs of recessed retainers. The stoppers contact the retainers.

Compressor

A compressor valve structure permits improvement in durability and volumetric efficiency of a compressor and limits power losses. The width of the base portion of each suction reed valve is shorter than the width of the valve flap. The valve base plate has support portions, receiving portions, main coupling portions, and auxiliary coupling portions. Each support portion receives a central area of corresponding one of the valve flaps. The receiving portion receives a distal area of the valve flap. The main coupling portion extends from the support portion and couples the support portion to the receiving portion. The auxiliary coupling portion extends from the support portion. The suction ports are formed through the valve base plate, while leaving the support portions, the receiving portions, the main coupling portions, and the auxiliary coupling portions.

Compressor having suction reed valve and valve plate arrangement

A compressor includes a valve base plate, which is arranged between a suction chamber and a compression chamber and has a suction port. The valve base plate includes a sealing surface, a recessed groove, a receiving surface, and a support surface. The sealing surface is flush with a fixing surface and contacts the valve portion in an annular manner. The recessed groove is located at an outer side of the sealing surface and recessed with respect to the fixing surface. The recessed groove includes a bottom portion and separates an edge portion of the valve portion from the bottom portion. The receiving surface is flush with the fixing surface and capable of contacting a distal zone of the valve portion. The support surface is flush with the fixing surface and capable of contacting a middle zone located at an inner side of the sealing surface of the valve portion.

A compressor includes a housing, compression unit, discharge chamber, outlet, and oil separation structure. The oil separation structure, which is arranged between the discharge chamber and the outlet, includes an oil reservoir, oil separation compartment, intake passage, exhaust passage, and supply passage. The oil separation compartment is located upward from the oil reservoir. The intake passage, which extends upward from the oil separation compartment, draws refrigerant gas into the oil separation compartment from the discharge chamber to separate lubrication oil from the refrigerant gas. The exhaust passage extends upward from the oil separation compartment and discharges the refrigerant gas in the oil separation compartment out of the housing through the outlet. The supply passage extends upward from the oil separation compartment and has a larger cross-sectional area than the intake passage. The supply passage supplies the oil reservoir with lubrication oil from the oil separation compartment.

A compressor includes a discharge chamber, compressor chamber, valve plate, and discharge reed valve. The valve plate includes a fixing surface, exposed to the discharge chamber, and a discharge port, which communicates the discharge chamber and the compression chamber. The discharge reed valve includes a fixed portion, fixed to the fixing surface, a base portion, separable from the valve plate, and a valve portion, which closes the discharge port. The valve plate includes an annular seal surface, recessed groove, receiving surface, and support surface. The seal surface contacts the valve portion around the discharge port. The recessed groove is arranged in the fixing surface outward from the seal surface. The receiving surface is flush with the fixing surface and contacts a distal region of the valve portion. The support surface is flush with the fixing surface and contacts a central region of the valve portion.

The present invention provides a variable displacement swash plate type compressor that reduces wear of cylinder bores and the amount of blow-by gas. Each piston of the compressor has a piston main body, which has a distal portion located at an end corresponding to the compression chamber. A tapering portion and an arcuate portion are formed in the distal portion. The arcuate portion is continuous with an end of the tapering portion that is closer to the compression chamber. The tapering portion and the arcuate portion each have a diameter that increases toward the skirt. The tapering portion has a tapering angle that is in a range from 0.45 degrees to 1.5 degrees. The distance between the distal end of the piston main body and a starting point of the tapering portion on an end closer to the skirt is set in a range from 1.5 mm to 5.0 mm.

Variable displacement swash plate type compressor

A compressor includes a discharge chamber, a compression chamber, a partition wall, and a discharge reed valve. The partition wall is arranged between the discharge chamber and the compression chamber and includes a fixing surface facing the discharge chamber. The partition wall includes a discharge port that communicates the discharge chamber and the compression chamber. The discharge reed valve includes a fixed portion, an intermediate portion, and a valve portion. The fixing surface includes a first groove portion, which extends around the discharge port, and a valve seat surface, which is arranged between the discharge port and the first groove portion. The first groove portion extends to a range overlapped with the intermediate portion. A part of the valve portion at a distal side does not close the first groove portion. The valve seat surface includes a receiving portion.

A suction port as a fluid port of a piston type compressor is contoured with reference to a middle line passing through a middle point of a maximum length of the suction port in the longitudinal direction of the suction valve and perpendicularly crossing a reference line extending in the longitudinal direction. The middle line divides the suction port into a first section positioned on the proximal end side and a second section positioned on the distal end side. An area of the second section is greater than an area of the first section. A width increasing region is disposed in which the width of the suction port becomes gradually greater from the proximal end side to the distal end side, and the length of the width increasing region occupies a major part of the maximum length of the suction port.

Piston type compressor having arcuately shaped fluid port

A suction port of a piston type compressor is formed in the shape similar to a portion of a sector with an apex portion of the sector removed. A distal end portion of a suction valve which can open and close the suction port has a contour line including a distal end forming line extending generally parallel to a distal end line of the suction port, and side lines. A gap between the distal end line of the suction port and the distal end forming line of the suction valve is substantially constant, and a gap between the distal end forming line and the circle of the cylinder bore is substantially constant. The ease of the inflow of a gas when the gas is sucked from the suction port to the cylinder bore is improved.

Piston type compressor having suction structure with arcuately shaped suction valve

A mechanism for attenuating torsional vibration in a compressor is described. The compressor includes a swash plate secured to a drive shaft and pistons coupled to the swash plate. Compression of refrigerant gas by the pistons generates torsional vibrations of the drive shaft. The rear end of the drive shaft is coupled to a damper for attenuating torsional vibrations. The damper includes a frictional plate secured to the rear end of the drive shaft, a weight rotatably fitted about the drive shaft, and a coil spring. The coil spring elastically presses the weight against the frictional plate and elastically couples the weight with the drive shaft. When the drive shaft torsionally vibrates, the weight contacts the frictional plate and is vibrated about the axis of the drive shaft by the coil spring. As a result, energy of the torsional vibrations is consumed and the vibrations are attenuated. Further embodiments show similar dampers attached to the exterior of the compressor.

Torsional vibration attenuating structure in compressor

A compressor having a rotating member, which includes a drive shaft and a swash plate. A piston compresses gas and torsionally vibrates the rotating member. A damper is coupled to the shaft to reduce torsional vibrations of the rotating member. The natural frequency of the damper is substantially equal to that of the rotating member. The damper includes a metal pin coupled to the shaft, a weight coupled to the rotating member, and a rubberlike body arranged between the shaft and the weight. The pin functions as a spring acting in the direction of the torsional vibrations and has a spring constant that remains substantially the same within the operating temperature range of the compressor. The weight is vibrated torsionally with the rotating member by the pin to offset the torsional vibrations of the rotating member. The natural frequency of the damper is determined mainly by the mass of the weight and the spring constant of the pin. The rubberlike body absorbs the torsional vibrations of the rotating member and has a spring constant smaller than that of the pin such that the natural frequency of the damper is substantially unaffected by the rubberlike body.

A compressor includes a drive shaft rotatably supported by a housing, a swash plate supported on the drive shaft, a plurality of cylinder bores defined in the housing, a plurality of pistons positioned in associated cylinder bores and a clutch. The clutch engaged and disengaged by a solenoid. A dynamic damper is positioned on the rear side of the drive shaft. The dynamic damper includes an elastic portion made of rubber and a mass portion made of metal. In another embodiment, the mass portion of the dynamic damper has a plurality of radially extending projections. In a further embodiment, the dynamic damper has a ring shape and is fixed to the armature of the clutch.

Vibration torsion system damper for a shaft of a compressor

The surface of a central section of a spiral element formed on a stationary or a movable scroll unit of a scroll type compressor is determined through the steps of locating an outer wall surface changing point G in a first polar coordinate system X, Y having a first origin O, drawing a circle Cs with its center at the first origin O and with a diameter corresponding to the orbital radius e of the orbiting motion of the movable scroll unit, locating a contact point P at a desired contact angle .beta. on the circle Cs, drawing a straight line m passing through the contact point P and the first origin O, drawing a straight line I passing the outer wall surface changing point G and inclined at a predetermined angle .alpha. to the X-axis, determining the intersection point C of the straight lines m and I, and determining a section of the contact curve in a second polar coordinate system having its second origin at the intersection point C by determining a smooth curve interconnecting the outer wall surface changing point G and the contact point P, and smoothly merging into an outer curve at the outer surface changing point G. The compression clearance formed between the scroll elements can be substantially reduced to zero at the final stage of a compression cycle so that the compression efficiency can be improved, the vibration and noise are reduced, and that the operation reliability can be improved.

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Kariya, Japan

Masakazu Obayashi