Abstract: A compressor includes a housing; a suction region and a discharge region which are formed in the housing in a partitioned manner. The compressor also includes a shaft which is pivotally supported in the inside of the housing. The compressor further includes a compression mechanism which sucks a refrigerant from the suction region and discharges the refrigerant to the discharge region due to a rotational motion of the shaft. The compressor further includes a bypass passage which makes the suction region and the discharge region communicate with each other, a valve element 41 which is capable of closing the bypass passage 40 from a discharge region side, and a spring which biases the valve element toward the discharge region side.

Abstract: At a housing, a first gas passage I and a second gas passage II extending along the axial direction, a third gas passage III formed substantially symmetrical to the first gas passage I relative to a plane containing a drive shaft, a fourth gas passage IV formed substantially symmetrical to the second gas passage II and communicating with the second gas passage II and an external component that includes an intake port and an outlet port are disposed. Either the first gas passage or the third gas passage is made to communicate with the intake port to supply a working fluid to a front-side intake chamber and a rear-side intake chamber, and either the second gas passage or the fourth gas passage is made to communicate with a front-side outlet chamber and a rear-side outlet chamber with the gas passage not in communication with the outlet chambers made to communicate with the outlet port.

Abstract: A reciprocating compressor includes a cylinder block having formed therein a plurality of cylinders, pistons that make reciprocal movement inside the cylinders, a first cylinder head fixed to one end of the cylinder block via a valve plate, a second cylinder head fixed to another end of the cylinder block via a valve plate, a first delivery chamber formed at the first cylinder head, into which a working fluid let out from a first compression space formed toward one end inside each of the cylinders is guided, a second delivery chamber formed at the second cylinder head, into which a working fluid let out from a second compression space formed toward another end inside each of the cylinders is guided, a plurality of delivery passages formed at the cylinder block and an outlet port located at the cylinder block or the cylinder head.

Abstract: At a housing, a first gas passage I and a second gas passage II extending along the axial direction, a third gas passage III formed substantially symmetrical to the first gas passage I relative to a plane containing a drive shaft, a fourth gas passage IV formed substantially symmetrical to the second gas passage II and communicating with the second gas passage II and an external component that includes an intake port and an outlet port are disposed. Either the first gas passage or the third gas passage is made to communicate with the intake port to supply a working fluid to a front-side intake chamber and a rear-side intake chamber, and either the second gas passage or the fourth gas passage is made to communicate with a front-side outlet chamber and a rear-side outlet chamber with the gas passage not in communication with the outlet chambers made to communicate with the outlet port.

Abstract: A reciprocating compressor comprising a cylinder block (3) having formed therein a plurality of cylinders (11), a shaft rotatably passing through the cylinder block and pistons engaged in reciprocating movement inside the cylinders (11) as the shaft rotates, which is installed by fastening mounting leg parts (31) disposed at the cylinder block (3) at mounting positions, is characterized in that the mounting leg parts are each constituted with a connecting portion (31a) extending from the cylinder block 3 and a projected portion (31b) formed continuously to the connecting portion to project on one side or both sides of the connecting portion along the tightening direction and that the projected portion (31b) has a lower level of rigidity compared to the connecting portion (31a).

Abstract: The lubrication between a shoe and a shoe pocket is improved without having to perform a complicated forming process. In a swash plate compressor comprising a swash plate locked to a drive shaft, which rotates together with the drive shaft, a shoe 31 that slidably contacts the swash plate, a piston 13 slidably disposed within a bore defining a compression space and a shoe pocket 36 that is formed as an integrated part of the piston 13 and slidably fits with the shoe 31, a beveled portion 41 is formed at an edge of an opening at the shoe pocket 36. A recessed portion 40 of the shoe pocket 36 is formed so as to achieve a constant curvature, whereas a projecting portion 32 of the shoe 31 is formed so as to achieve at least two different curvatures. The shoe pocket is designed so that a tangent point 46 of the recessed portion 40 and the beveled portion 41 is set within a strip range 45 over which the projecting portion 32 and the recessed portion 40 achieve contact with each other.

Abstract: A reciprocating compressor includes a front-side delivery chamber 18a formed at a front-side cylinder head 6, a rear-side delivery chamber 18b formed at a rear-side cylinder head 8, a plurality of delivery passages 12a and 12b formed at cylinder blocks 2 and 4 and an outlet port 16 that communicates between one of the delivery passages and an external circuit. The other delivery passage 12b that is not in communication with the outlet port 16 is made to communicate with the front-side delivery chamber 18a and the rear-side delivery chamber 18b and is also made to communicate with the delivery passage 12a in communication with the outlet port 16 via a guide passage 17.

Abstract: An inlet port 15 is divided into a plurality of holes 15a, 15b, 15c, 15 by ribs 61a, 61b, 61c. For example, when liquid refrigerant is compressed within a compression chamber, the inlet valve 21 receives excessive load which is about to bend the inlet valve 21 largely toward the suction chamber side. However, the inlet valve 21 is supported by the ribs 61a, 61b, 61c, and therefore the inlet valve 21 is hardly bent, but the inlet port 21 is positively closed.

Abstract: The lubrication between a shoe and a shoe pocket is improved without having to perform a complicated forming process. In a swash plate compressor comprising a swash plate locked to a drive shaft, which rotates together with the drive shaft, a shoe 31 that slidably contacts the swash plate, a piston 13 slidably disposed within a bore defining a compression space and a shoe pocket 36 that is formed as an integrated part of the piston 13 and slidably fits with the shoe 31, a beveled portion 41 is formed at an edge of an opening at the shoe pocket 36. A recessed portion 40 of the shoe pocket 36 is formed so as to achieve a constant curvature, whereas a projecting portion 32 of the shoe 31 is formed so as to achieve at least two different curvatures. The shoe pocket is designed so that a tangent point 46 of the recessed portion 40 and the beveled portion 41 is set within a strip range 45 over which the projecting portion 32 and the recessed portion 40 achieve contact with each other.

Abstract: An inlet port 15 is divided into a plurality of holes 15a, 15b, 15c, 15 by ribs 61a, 61b, 61c. For example, when liquid refrigerant is compressed within a compression chamber, the inlet valve 21 receives excessive load which is about to bend the inlet valve 21 largely toward the suction chamber side. However, the inlet valve 21 is supported by the ribs 61a, 61b, 61c, and therefore the inlet valve 21 is hardly bent, but the inlet port 21 is positively closed.

Abstract: A main stopper recess 70 for supporting a protuberance 21d of an inlet valve 21 during the suction stroke and sub-stopper recesses 71, 72 for supporting side protuberances 21e, 21f of the inlet valve 21 during the suction stroke are formed at an opening edge 6a of the cylinder bore. Due to this construction, even when the area of inlet port 15 is increased, large twisting load is not applied to the inlet valve 21 during the suction stroke, and vibrations of the inlet valve 21 are prevented.

Abstract: A refrigerant compressor has a first high pressure chamber formed in the rear head, a second high pressure chamber formed on the outer peripheral surface of the cylinder block, and a discharge passage communicating between the two. The discharge passage comprises at least one through hole through which a corresponding through bolt extends, at least one communication passage between the through hole and the first high pressure discharge chamber, at least one communication hole in the cylinder block communicating the through hole to the second high pressure chamber. Alternate embodiments include an oil reservoir and means for separating lubricant carried by the fluid flow within the discharge passage.

Abstract: A variable capacity wobble plate compressor includes a first spring, fitted on a drive shaft between a hinge ball axially slidably fitted on the drive shaft and a thrust flange rigidly fitted on the drive shaft, for urging the hinge ball toward a cylinder block, and a second spring fitted on the drive shaft between the hinge ball and the cylinder block for urging the hinge ball toward the thrust flange. As the hinge ball is moved toward the thrust flange, a linkage connecting a drive hub slidably mounted on the hinge ball a causes an inclination of the drive hub to be increased to increase capacity of the compressor, and as the hinge ball is moved toward the cylinder block, the linkage causes the inclination of the drive hub to be decreased to decrease the capacity of the compressor. A first stopper blocks the hinge ball from moving toward the thrust flange in excess of a predetermined amount, to thereby restrict an increase in the inclination of the drive hub and set the maximum capacity of the compressor.

Abstract: A variable capacity wobble plate compressor includes a drive shaft, a rotating member rigidly fitted on the drive shaft for rotation in unison with the drive shaft, a tilting rotating member mounted on the drive shaft in a slidable manner, and a pair of link members connecting the rotating member and the tilting rotating member to each other. The rotating member has one radial end portion thereof formed with a pair of link member-holding portions extending in parallel with each other. The pair of link members has one ends thereof pivotally connected to the pair of link member-holding portions by a first connecting member, and other ends thereof connected to the tilting rotating member by a second connecting member.

Abstract: A guide member of a wobble plate compressor is slidably mounted in an inner wall surface of a housing of the wobble plate compressor. The guide member comprises a guide part having a U-shaped cross-section and defining a linear guide groove therein into which is slidably inserted a rotation-preventing member rigidly mounted on the wobble plate, and a pair of half cylinder shaped sliding parts mounted on opposite sides of the guide part for sliding in the inner wall surface of the housing. The inner surface of the guide member is hardened by surface treatment.

Abstract: A refrigerant compressor includes a drive shaft, a pulley fixedly fitted on the drive shaft, over which is passed a torque-transmitting member for transmitting torque from an external drive source to the drive shaft, and a compression rotational member mounted on the drive shaft for rotation in unison with the drive shaft to enable compression of a refrigerant gas. The pulley has a rim in the form of a hollow cylinder, over which is passed the torque-transmitting member, a boss which is fixedly fitted on the drive shaft, and a support member connecting the rim and the boss. A breakaway portion is provided in the support member or the drive shaft for breaking to disconnect the torque-transmitting member from the compression rotational member when a load torque larger than a predetermined value is applied to the breakaway portion.

Abstract: A hinge ball for a variable capacity wobble plate compressor includes a central through hole 27 for permitting a shaft 5 to loosely extend therethrough, and an outer peripheral wall 9b in a convex form for being slidably fit with an inner peripheral wall 43a in a concave form of a boss 43 of a drive hub 41 rotatively fitted on the shaft 5. The shaft 5 is higher in hardness than the hardness of the boss 43 of the drive hub 41, and the outer peripheral surface 9b in sliding contact with the inner peripheral surface 43a of the boss 43 of said drive hub 41 is lower in hardness than the hardness of the shaft 5 and the boss 43 of the drive hub 41 or equal in hardness thereto. The hardness of the inner peripheral wall 9a defining the central through hole 27 is made higher than the hardness of the boss 43 of the drive hub 41.

Abstract: A drive hub-receiving surface 40c of a thrust flange 40 is set substantially at a right angle to the axis of a shaft 5, whereby when the compressor drastically enters the maximum delivery quantity condition, an abutment portion 41c of a drive hub 41 substantially perpendicularly abuts on the drive hub-receiving surface 40c of the thrust flange 40. This prevents load from perpendicularly acting on the shaft 5, causing substantially no elastic deformation of the shaft 5. Further, under the maximum delivery quantity condition, the abutment portion 41c of the drive hub 41 perpendicularly abuts on the drive hub-receiving surface 40c, so that compression reaction forces acting from a piston 7 to the drive hub 41 are absorbed by the drive hub-receiving surface 40c of the thrust flange 40, thereby decreasing the vibration of the drive hub 41.