Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Estir Co., Ltd.

Yanmar Co., Ltd.

Japan Aerospace Exploration Agency

National Maritime Research Institute

National Institute of Maritime, Port and Aviation Technology

Teruyuki Akazawa

Sadao Kawahara

Akihiko Shimizu

Noboru Iida

Kiyoshi Sawai

Akira Hiwata

Yoshifumi Abe

Nobuaki Ogawa

Yoshiyuki Futagami

Osamu Sakamoto

Taeko Tahara

Tsutomu Nakatsuka

Takashi Morimoto

Hiroshi Hasegawa

Masahiko Makino

Hidenobu Shintaku

Tatsuhisa Taguchi

Yasuhiro Asaida

Masaru Nagaike

Masafumi Fukushima

Kunio Iwanami

Sugimatsu Hasegawa

Takao Fujita

Masakuni Kawada

Koichi Hirata

Takeshi Hoshino

Takeshi Japan Aerospace Hoshino

Koichi c/o National Maritime Res Inst Hirata

Masakuni c/o National Maritime Res Inst Kawada

The present invention provides a The vibration-based electric power generator in which one of ends of a magnet holding memberand one of ends of an outer yokeare connected to each other through a first support springwhich is a leaf spring, the other end of the magnet holding memberand the other end of the first support springare connected to each other through a second support springwhich is a leaf spring, and the outer yokeor the magnet holding memberis fixed to a structuresuch as a wall surface, a road sign, a vehicle body and a railway bridge for generating electric power from vibration of the structure. The vibration-based electric power generator has excellent durability and can generate electric power even by slight vibration.

Vibration-based electric power generator

The present invention provides a Stirling engine capable of effectively recovering heat from exhaust gas flowing through a flue, and capable of connecting a heating portionand a regeneration portionwith each other through an operation gas tube without providing a flow passage separating portion, and as the removing mode, number of revolutions of the Stirling engine is reduced, an operation of the Stirling engine is stopped, an amount of generated electricity at the Stirling engine is reduced, or the Stirling engine is reversely rotated.

Stirling engine and method of removing impurities in a heat-transfer tube group in a power device or a power-generating device which uses a stirling engine

The present invention provides a Stirling engine capable of effectively recovering heat from exhaust gas flowing through a flue, and connecting a heating portionand a regeneration portionwith each other through an operation gas tube without providing a flow passage separating portion, and the heating portionincludes a heating portion headand a heat-transfer tube group, the heating portion headincludes first through holesR and second through holesS, the first through holesR are formed closer to a center region of the heating portion headas compared with the second through holesS, one ends of U-shaped tubes are mounted in the first through holesR and the other ends of them are mounted in the second through holesS, and parallel exhaust gas flow passages is formed between the U-shaped tubes.

Stirling engine

a First gap () in a thrust direction between teeth bottoms of a fixed mirror plate () and teeth tips of an orbiting lap (), and a second gap () in the thrust direction between teeth bottoms of an orbiting mirror plateand teeth tips of a fixed lap () are formed such as to gradually increase from an outer peripheral side to an inner peripheral side of a scroll compressor, the first gap () is made greater than the second gap (). Contact surface pressures of the laps () and () are kept low with respect to pressure formation, contact pressure of the teeth tips of the fixed scroll part () and the teeth bottoms of the orbiting scroll part ()are equally maintained. With this loads applied to the scroll parts () and ()are equally received by a thrust surface.

Scroll compressor having a fixed scroll part and an orbiting scroll part

A high efficient stirling engine with excellent thermal efficiency, which can increase the heating temperature of a high temperature section, is obtained by preventing the heat from being lost in a member connecting the high temperature section and a low temperature section. The high temperature sectionand the member (a regenerator housing) connecting the high temperature section and the low temperature section are formed to have a split configuration by using different materials for the each, in which the high temperature sectionis formed of a heat resistant/high heat conductive material having high heat resistance property and high heat conductivity, the regenerator housingconnecting the high temperature sectionand the low temperature sectionis formed of a heat resistant/low heat conductive material having low heat conductivity, and the both are bonded integrally to each other to obtain an integral sealed structure.

A back pressure chamber () provided on a back surface of an orbiting scroll () is divided into an inner region () and an outer region () by an annular seal (). A diameter d of the annular seal () is set 0.5 times or more of a diameter D of an orbiting mirror plate (). With this, plus thrust force can be applied to the orbiting scroll () irrespective of magnitude of a discharge pressure Pd applied to the inner region (). Therefore, it is possible to push the orbiting scroll () against the fixed scroll () only by back pressure of discharge pressure. A set pressure Pm of the outer region () is reduced to a value close to a suction pressure Ps, a pressure adjusting mechanism () is swiftly opened after a scroll compressor is started. With this, lubricant oil is supplied from the outer region () to the suction space () without a time lag.

Scroll compressor with certain pressure ratio between discharge pressure and suction pressure and with certain ratio of diameter of orbiting mirror plate and outer diameter of the annular seal

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.

Linear compressor with vibration canceling spring arrangement

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.

Linear compressor

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.

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.

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.

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.

A linear compressor comprises a cylinder,, a piston,, a linear motor comprising a movable member,as well as a stationary member,, a piston body,, a discharge mechanism,, a spring mechanism,, a vessel,, a supporting mechanism,and the like. A cylindrical holding member,is contact with a flange,connected to the piston and supported concentrically with the piston,. A permanent magnet,is sandwiched between the cylindrical holding member,and a cylindrical body,. Cylindrical inner yoke,and outer yoke,of the stationary member,are fixed to the cylinder,, and held concentrically with the piston,. With the above structure, the movable,is smoothly moved together with the piston,, and a fine gap between the movable member,and the stationary member,is always maintained stationary. Further, since the linear motor is in contact with the piston,, the overall length of the linear compressor is shortened, and the linear compressor is reduced in size. Therefore, it is possible to easily mount the movable member to the piston with high precision, and it is possible to easily mount the permanent magnet of the movable member with high precision.

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.

Scroll compressor having a horseshoe-shaped partition wall on the

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.

Growing community of inventors

Shiga, Japan

Teruyuki Akazawa