Panasonic Intellectual Property Management Co., Ltd.

Yusuke Imai

Takashi Morimoto

Atsushi Sakuda

Sadayuki Yamada

Takeshi Ogata

Hidenobu Shintaku

Akihiro Hayashi

Osamu Aiba

Hiroyuki Kawano

Yoshiyuki Futagami

Hirofumi Yoshida

Yoshinori Ishida

Takeshi Hashimoto

Satoshi Iitsuka

Tatsuya Nakamoto

Shiho Furuya

Akinori Fukuda

Takeshi Hiratsuka

Akifumi Hyodo

Yusaku Araki

A rotary compressorincludes a drive shafthaving an eccentric shaft, a pistonfitted onto the eccentric shaft, a cylinderthat receives the eccentrically rotating piston, an upper end plateand a lower end platethat close the upper and lower opening surfaces of the cylinder, a vanethat divides a space formed by the cylinder, the piston, the upper end plate, and the lower end plateinto a suction chamberand a compression chamber, a discharge spacethat is formed by causing the coverto close a recessed portionobtained by recessing a surface of either the upper end plateor the lower end plateon the opposite side to the cylinderand where discharge gas flows in from the compression chamberand directly flows out to the outside of the compressor, and spatial volume of the discharge spacehaving 10 times enclosed volume of the cylinder, thereby reducing noise and vibration due to discharge pulsation as well as improving efficiency and reliability and reducing cost.

Rotary compressor

It is assumed that a distance between a center portion of fixed scroll end plate and an outer peripheral portion at a distal end of fixed spiral wrap of fixed scroll is Ds, and that a distance between a center portion of orbiting scroll end plate and a portion included in a bottom face of an orbiting spiral wrap of orbiting scroll and facing the outer peripheral portion at the distal end of the fixed spiral wrap of the fixed scroll is Do. Further, assuming that an orbiting radius of orbiting scroll is &#x3b5;, the orbiting radius being a distance between a center of eccentric shaft and a center of driving shaft, a relationship Ds+&#x3b5;&#x2264;Do is satisfied.

Scroll compressor with integral driving shaft and eccentric shaft

A scroll compressor according to the present disclosure includes a partition wall that divides a sealed vessel into a high-pressure space and a low-pressure space, a non-orbiting scroll provided in the low-pressure space, an orbiting scroll that forms a compression chamber between the orbiting scroll and the non-orbiting scroll, and a rotational shaft. The scroll compressor further includes a main bearing that supports the orbiting scroll, an elastic body that biases one of the non-orbiting scroll and the orbiting scroll so as to separate the non-orbiting scroll and the orbiting scroll from each other, and a plurality of columnar members that are fixed at one ends of the columnar members and are movable at the other ends of the columnar members, and are disposed in a circumferential direction. The non-orbiting scroll or the orbiting scroll that is biased by the elastic body is movable between the partition wall and the main bearing in an axial direction of the rotational shaft. The elastic body is disposed between the plurality of columnar members in the circumferential direction.

Scroll compressor

A scroll compressor includes a pillar-shaped member that is inserted into a scroll-side engagement section formed on a stationary scroll. A lower end-face of an engagement section between the pillar-shaped member and the scroll-side engagement section is located above a lap end-face of a stationary spiral lap.

A scroll compressor according to the present invention includes a partition plate that partitions a sealed container into a high-pressure space and a low-pressure space, a fixed scroll adjacent to the partition plate, a orbiting scroll, a rotation restrictor, and a main bearing. The sealed scroll compressor further includes a pillar member having a lower end portion secured in a bearing-side engagement portion provided in the main bearing, and an upper end portion inserted in a scroll-side engagement portion provided in the fixed scroll. The axial distance from the upper end portion of the pillar member to the partition plate is smaller than the length by which the pillar member and the bearing-side engagement portion are coupled together.

Compressor with main bearing, partition plate, and fixed and orbiting scrolls therebetween

A scroll compressor includes partition plate () that partitions an inside of sealed container () into high-pressure space () and low-pressure space (), and fixed scroll () adjacent to partition plate (). The scroll compressor includes orbiting scroll () that meshes with fixed scroll () to form compression chamber (), rotation restrictor () that prevents rotation of orbiting scroll (), and main bearing () that supports orbiting scroll (). Fixed scroll (), orbiting scroll (), rotation restrictor (), and main bearing () are disposed in low-pressure space (), and fixed scroll () and orbiting scroll () are disposed between partition plate () and main bearing (). The scroll compressor includes bearing coupler () provided in main bearing (), scroll coupler () provided in fixed scroll (), and pillar member () having a lower end and an upper end, the lower end being inserted in bearing coupler () and the upper end being inserted in scroll coupler (). A coupling region where pillar member () couples with scroll coupler () is in intersecting relationship with a horizontal plane positioned at a center of a scroll wrap height of fixed scroll ().

An elastic body is provided which biases one of a fixed scroll and an orbiting scroll in a direction in which the fixed scroll and the orbiting scroll are spaced away from each other. With this, upon the start-up of a compressor, a gap is formed between the fixed scroll and the orbiting scroll, and thus the startability is improved.

Scroll compressor with movable non-orbiting scroll

A scroll compressor of the present invention includes a first discharge portwhich is in communication with a compression chamber, a discharge spaceH which is in communication with the first discharge port, a second discharge portwhich brings the discharge spaceH into communication with a high pressure space, a discharge check valvecapable of closing the second discharge port, a bypass portwhich brings the compression chamberinto communication with the discharge spaceH, and a bypass check valvecapable of closing the bypass port, the fixed scrollcan move in an axial direction of the fixed scroll between the partition plateand the main bearing, a high pressure is applied to the discharge spaceH and according to this, the fixed scrollcan be pressed against the orbiting scroll

Scroll compressor having a fixed scroll pressed in an axial direction against an orbiting scroll

A scroll compressor of the present invention includes a partition plate, a fixed scroll, an orbiting scroll, a rotation-restraining member, a main bearing, a bearing-side concave portion, a scroll-side concave portionand a columnar member. A lower end of the columnar memberis inserted into the bearing-side concave portion, and an upper end of the columnar member is inserted into the scroll-side concave portion. The columnar memberslides with at least one of the bearing-side concave portionand the scroll-side concave portion, thereby moving the fixed scrollin an axial direction between the partition plateand the main bearing. A high pressure is applied to a discharge spaceH, thereby pressing the fixed scrollagainst the orbiting scroll

A scroll compressor of the present invention includes a partition plate, a fixed scroll, an orbiting scroll, a rotation-restraining member, a main bearing, a discharge space, a ring-shaped first seal member and a ring-shaped second seal member. A pressure in the medium pressure space is set lower than that in the discharge space and higher than that in the low pressure space. The first seal member and the second seal member are sandwiched by the partition plate by means of a closing member, the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing. If a high pressure is applied to the discharge space, the fixed scroll can be pressed against the orbiting scroll.

Scroll compressor in which a fixed scroll and an orbiting scroll are placed between a partition plate and a main bearing

A scroll compressor of the present invention includes a partition plate, a fixed scroll, an orbiting scroll, a rotation-restraining memberand a main bearing. An inner wall of a fixed spiral lapof the fixed scrollis formed up to a location close to an ending-end of an orbiting spiral lapof the orbiting scroll, thereby differentiating, from each other, a containment capacity of one (A) of compression chambers and a containment capacity of the other compression chamberB, the fixed scrollcan move in an axial direction of the fixed scroll between the partition plateand a main bearing, and high pressure is applied to a discharge spaceH formed between the partition plateand the fixed scroll. According to this, the fixed scrollcan be pressed against the orbiting scroll

A diameter of a main bearing memberis defined as Dm, a length thereof is defined as Lm, a diameter of the eccentric bearing memberis defined as De and a length thereof is defined as Le. A ratio (=Lm/Dm) of the length and the diameter of the main bearing memberand a ratio (=Le/De) of the length and the diameter of the eccentric bearing memberare set to Le/De&#x2266;Lm/Dm&#x2266;1. Therefore, contact at edge portions of both ends of the eccentric bearing memberdoes not occur, and it is possible to prevent contact at edge portions of both ends of the main bearing membereven if the main shaftinclines, and to reduce a viscosity loss caused by oil. Hence, the present invention provides a scroll compressor securing reliability of the bearing membersandand having high efficiency.

According to a compressor of the present invention, the compressor further comprises an oil separating mechanismwhich separates oil from the refrigerant gas discharged from the compressing mechanism, the oil separating mechanismincludes a cylindrical spacein which the refrigerant gas orbits, an inflow portionfor flowing the refrigerant gas discharged from the compressing mechanisminto the cylindrical space, a sending-out portfor sending out, from the cylindrical spaceto the one container space, the refrigerant gas from which the oil is separated, and an exhaust portfor discharging the separated oil and a portion of the refrigerant gas from the cylindrical space, and a center of the sending-out portis deviated in a direction opposite from the inflow portionfrom a center axis of the cylindrical space

Compressor

According to a compressor of the present invention, the compressor further comprises an oil separating mechanismwhich separates oil from the refrigerant gas discharged from the compressing mechanism, the oil separating mechanismincludes a cylindrical spacein which the refrigerant gas orbits, an inflow portionfor flowing the refrigerant gas discharged from the compressing mechanisminto the cylindrical space, a sending-out portfor sending out, from the cylindrical spaceto the one container space, the refrigerant gas from which the oil is separated, and an exhaust portfor discharging the separated oil from the cylindrical spaceinto the other container space. According to this configuration, efficiency of the electric motoris enhanced, volumetric efficiency is enhanced, and low oil circulation is realized.

Growing community of inventors

Shiga, Japan

Yusuke Imai