Abstract: A linear compressor is provided in which a driving spring and an elastic supporting member for supporting a compressing mechanism portion are disposed such that a piston and the compressing mechanism portion move in opposite phases such that vibration of a hermetic vessel is canceled out. The linear compressor comprises a hermetic vessel having a compressing mechanism portion and a linear motor therein. The compressing mechanism portion includes a piston-side mechanism and a cylinder-side mechanism, the former includes the piston and the mechanism member which is movable together with the piston, the latter includes the cylinder and the stator which connects with the cylinder. The cylinder-side mechanism member is elastically supported at opposite ends in the hermetic vessel by a first elastic member, and a reciprocating force in the axial direction is given the piston-side mechanism by a second elastic member whose one end is supported by the hermetic vessel.

Abstract: A linear compressor includes a cylinder supported in a hermetic vessel by a support mechanism. A piston is supported concentrically with the cylinder such that the piston can move in an axial direction of the cylinder. A compression chamber is formed between the cylinder and the piston. A linear motor portion has a moving member connected to the piston through a holding member. A stator is fixed to the cylinder to form a magnetic path between the stator and the moving member. The linear motor portion generates thrust for moving the piston in the axial direction. A sensor detects a displacement of the axial length center of the moving member and a DC bias current is fed to the linear motor to align the axial length of the moving member and the axial length of the stator with each other at the time of operation.

Abstract: It is an object of the present invention to provide a high-efficiency linear compressor in which even if a compression chamber is defined utilizing an inner space of the linear motor to reduce its size, an amount of heat transmitted from the linear motor to the compression chamber can be reduced by forming a space between the linear motor and a cylinder which defines the compression chamber. The linear compressor comprises a cylinder having a flange and a cylindrical portion supported in a hermetic vessel by a support mechanism, a piston movably supported in the cylindrical portion along an axial direction thereof, a spring member applying an axial direction to the piston, and a linear motor having a stator fixed to the flange of the cylinder and disposed around an outer periphery of the cylindrical portion and a moving member coupled to the piston, wherein a space is formed between the stator and the cylindrical portion.

Abstract: It is an object of the present invention to provide a linear compressor in which a driving spring and a elastic supporting member for supporting a compressing mechanism portion are disposed such that a piston and the compressing mechanism portion move in reversed phases so that vibration of a hermetic vessel is canceled out. The linear compressor comprises a hermetic vessel having a compressing mechanism portion and a linear motor therein.

Abstract: An object of the present invention is to provide a high-efficiency and reliable linear compressor in which even when a pressing force is applied to its piston, the piston is turnably connected and supported through a connecting rod so that sliding surface pressure between the piston and a cylinder is not increased. The invention provides a linear compressor comprising a cylinder supported in a hermetic vessel by a support mechanism, a piston slidably supported by the cylinder along its axial direction, a spring member for applying an axial force to the piston, a connecting mechanism for connecting the piston and the spring member with each other, and a linear motor having a stator coupled to the cylinder and a moving member coupled to the piston, wherein and the connecting mechanism is connected to the piston such the connecting mechanism can rock with respect to the piston.

Abstract: It is an object of the present invention to provide an efficient and reliable linear compressor in which an axial length center of the moving member connected to a piston is previously deviated toward a compression chamber with respect to an axial length center of the stator, the axial length center of the moving member and the axial length center of the stator are substantially aligned with each other at the time of operation.

Abstract: It is an object of the present invention to provide a high-efficiency linear compressor in which even if a compression chamber is defined utilizing an inner space of the linear motor to reduce its size, an amount of heat transmitted from the linear motor to the compression chamber can be reduced by forming a space between the linear motor and a cylinder which defines the compression chamber. The linear compressor comprises a cylinder having a flange and a cylindrical portion supported in a hermetic vessel by a support mechanism, a piston movably supported in the cylindrical portion along an axial direction thereof, a spring member applying an axial direction to the piston, and a linear motor having a stator fixed to the flange of the cylinder and disposed around an outer periphery of the cylindrical portion and a moving member coupled to the piston, wherein a space is formed between the stator and the cylindrical portion.

Abstract: A linear compressor comprises a cylinder supported in a hermetic vessel by a supporting mechanism, a piston which is concentric with the cylinder and is slidably supported along its axial direction, and a linear motor for generating thrust force by forming a magnetic passage by a movable portion secured to the piston and a stationary portion secured to the cylinder, in which refrigerant introduced into the hermetic vessel from a suction tube is inhaled and compressed by reciprocating motion of the piston driven by the linear motor and the compressed refrigerant is discharged out from the hermetic vessel, wherein the suction tube is provided in the vicinity of a suction port leading to a compression chamber formed by the piston and the cylinder. With this structure, the refrigerant introduced from the suction tube is not heated by a linear motor, and the compressing efficiency can be prevented from being lowered.

Abstract: An object of the present invention is to provide a high-efficiency and reliable linear compressor in which even when a pressing force is applied to its piston, the piston is turnably connected and supported through a connecting rod so that sliding surfaces between the piston and a cylinder. The invention provides a linear compressor comprising a cylinder supported in a hermetic vessel by a support mechanism, a piston slidably supported by the cylinder along its axial direction, a spring member for applying an axial force to the piston, a connecting mechanism for connecting the piston and the spring member with each other, and a linear motor having a stator coupled to the cylinder and a moving member coupled to the piston, wherein and the connecting mechanism is connected to the piston such the connecting mechanism can rock with respect to the piston.

Abstract: A linear compressor disclosed herein includes a cylinder whose axial direction is directed to a horizontal direction. The linear compressor comprises a cylinder supported in a hermetic vessel by a supporting mechanism, a piston slidably supported along an axial direction of the cylinder concentrically with the cylinder, and a linear motor for generating thrust force by forming a magnetic passage by a movable portion secured to the piston and a stationary portion secured to the cylinder. The supporting mechanism comprises first and second coil springs supporting the cylinder from its opposite ends in the hermetic vessel, and at least one of the first and second coil springs comprises a plurality of coil springs which are juxtaposed to each other.

Abstract: A linear compressor comprises a cylinder 10, a piston 20, a linear motor comprising a movable member 40 as well as a stationary member 50, a piston body 28, a discharge mechanism 60, a spring mechanism 70, a vessel 80, a supporting mechanism 90 and the like. A cylindrical holding member 41 is contact with a flange 24 connected to the piston and supported concentrically with the piston 20. A permanent magnet 42 is sandwiched between the cylindrical holding member 41 and a cylindrical body 43. Cylindrical inner yoke 51 and outer yoke 52 of the stationary member 50 are fixed to the cylinder 10, and held concentrically with the piston 20. With the above structure, the movable 40 is smoothly moved together with the piston 20, and a fine gap between the movable member 40 and the stationary member 50 is always maintained stationary. Further, since the linear motor is in contact with the piston 20, the overall length of the linear compressor is shortened, and the linear compressor is reduced in size.

Abstract: A scroll compressor includes stationary and orbiting scroll members in engagement with each other. The stationary scroll member includes a stationary end plate having first and second end surfaces opposite to each other, a stationary scroll wrap protruding axially from the first end surface of the stationary end plate, a discharge port defined in the stationary end plate in the proximity of a center thereof, a generally horseshoe-shaped partition wall protruding axially from the second end surface of the stationary end plate, and spaced apart mounting legs protruding axially from the second end surface of the stationary end plate and continuous with the partition wall in such a manner that the partition wall extends between the mounting legs. Each of the mounting legs has a thickness greater than that of the partition wall and also has a height slightly greater than that of the partition wall.

Abstract: A scroll compressor includes stationary and orbiting scroll members in engagement with each other. The stationary scroll member includes a stationary end plate having first and second end surfaces opposite to each other, a stationary scroll wrap protruding axially from the first end surface of the stationary end plate, a discharge port defined in the stationary end plate in the proximity of a center thereof, and a recess defined in the stationary end plate on the second surface thereof. A check valve is received in the recess so as to open or close the discharge port. The recess has a shape substantially identical to the shape of the check valve and also has a depth greater than a maximum lift of the check valve.

Abstract: A scroll compressor includes an orbital drive mechanism for causing orbiting of an orbiting scroll relative to a stationary scroll. The orbiting scroll is formed with a generally cylindrical boss extending in a direction away from the stationary scroll. The orbital drive mechanism includes a main shaft rotatably supported by a compressor housing, an eccentric shaft extending from one end face of the main shaft and having a longitudinal axis parallel to, but offset laterally from a longitudinal axis of the main shaft, and an eccentric bush having a socket inserted rotatably into the cylindrical boss. The eccentric shaft, engaged in the socket, is of a non-circular cross-section having short and long axes perpendicular to each other.

Abstract: A scroll compressor includes an orbital drive mechanism for orbiting an orbiting scroll relative to a stationary scroll. The orbiting scroll is formed with a generally cylindrical boss extending in a direction away from the stationary scroll. The orbital drive mechanism includes a main shaft rotatably supported by a compressor housing, an eccentric shaft extending from one end face of the main shaft and having a longitudinal axis parallel to, but offset laterally from a longitudinal axis of the main shaft, and an eccentric bush having a socket inserted rotatably into the cylindrical boss. The eccentric shaft, engaged in the socket, has first and second rounded side faces opposite to each other both having a common center of curvature, while the socket has first and second inner wall portions opposite to each other, each of which has a center of curvature substantially aligned with the common center of curvature of the first and second rounded side faces of the eccentric shaft.

Abstract: A recess is provided in the wrap of a stationary scroll in the vicinity of a terminal end thereof on the side of a suction chamber, so that an orbital scroll can be prevented from collision against the stationary scroll, thereby avoiding breakage of both scroll wraps and occurrence of noises. Further, with the provision of another recess in the orbital scroll wrap in the vicinity of a terminal end thereof, the orbital scroll can be prevented from colliding against the stationary scroll, thereby preventing breakage of both scroll wraps and occurrence of noises.

Abstract: An outlet check valve includes an output valve seat provided at an outlet port or an outlet passage for compressed air in the vicinity of an outlet port of a compression mechanism and an outlet valve body. The valve seat and valve body are biased away from each other by a gravitational force or a spring. With this arrangement, even if a compressor is rotated at a low speed during a start-up operation, it is possible to cause stagnant liquid to undergo reverse flow into an accumulator disposed on the suction side and to store the liquid temporarily, thereby removing the liquid in the compression spaces and the suction passages and facilitating the start-up operation in a normal rotational direction. A pressure difference between the pressures upstream and downstream relative to the valve body is large when the normal rotating operation is stopped. By this pressure difference, the outlet valve body is moved to close the outlet valve seat, thereby to prevent the reverse rotation of the compression mechanism.

Abstract: The space in a closed container is divided into two parts by a partition wall member, gas jetting holes through which a high pressure gas released from a compression mechanism section is passed are formed in the partition wall member and a gas collision plate is disposed in opposed relation to the gas jetting holes, and therefore, there is provided a compressor of high achievement factor which is capable of preventing the discharge of oil from the compressor to a refrigerating cycle from being increased even if operated at high rotational frequency.

Abstract: A scroll-type compressor has a crankshaft connected to the rotor of an electric motor for causing an orbiting motion of an orbiting scroll member and having a main shaft formed at one end thereof and supported by a main bearing, an orbiting drive shaft formed on the side of an orbiting end plate opposite to an orbiting scroll wrap and received in an eccentric bearing disposed at an eccentricity in the main shaft, a rolling type upper bearing supporting the end of the crankshaft opposite to the main shaft, and a lift limiting plate fixed to the lower surface of the upper bearing to prevent excessive lift of the crankshaft. A step is formed on the crankshaft between a portion of a greater diameter at which the crankshaft is connected to the rotor, and a portion of a smaller diameter at which the crankshaft is received in the upper bearing.

Abstract: A swirling spiral impeller portion 13 is structured such that a pressure between the suction and discharge pressures acts on a part of the rear surface thereof. The compressor includes a means for adjusting and cooling the intermediate pressure which acts on a part of the swirling spiral impeller portion 13 by means of the lubricant oil stored in a lubricant oil reservoir 26 to which the discharge pressure in the sealed container acts. The lubricant oil supplied to the compression portion is provided under any pressure condition, and is always supplied stably. As the lubricant oil is cooled, it does not reduce the efficiency greatly.