Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Refrigeration Company

Panasonic Appliances Refrigeration Devices Singapore

Ko Inagaki

Ichiro Morita

Yoshinori Ishida

Masanori Kobayashi

Akira Nakano

Noboru Iida

Hiroyuki Kawano

Kenji Kinjo

Terumasa Ide

Yu Haraki

Akira Inoue

Makoto Katayama

Hidenori Kobayashi

Masaru Matsui

Masaaki Nagai

Ichiro Kita

Fuminori Sakima

Yasushi Hayashi

Masakazu Yamaoka

Tomio Maruyama

Tsuyoshi Matsumoto

Jun Yoshida

Takahiro Kondou

Akira Hayashi

Yoko Sugamoto

Shunji Moriwaki

Yasuhiro Bonkobara

Shigeo Aoyama

Yohei Matsunami

Kazuhito Nakatani

The present invention includes: an electric component; a compression component driven by the electric component; and a sealed container accommodating the electric component and the compression component. The compression component includes: a shaft part rotated by the electric component; and a bearing part slidingly contacting the shaft part. A film having hardness equal to or more than hardness of a sliding surface of the bearing part is provided on a sliding surface of the shaft part. The sliding surface of the bearing part includes a curved-surface portion having an inner diameter that continuously increases, or the sliding surface of the shaft part includes a curved-surface portion having an outer diameter that continuously decreases.

Refrigerant compressor and freezer including same

Sealed container () houses electric unit () equipped with stator () and a rotor (), and compression unit () disposed above electric unit (). Compression unit () includes shaft () that includes main shaft portion () and eccentric shaft portion (), and cylinder block (). Compression unit () further includes connection portion () that connects piston () reciprocatively inserted into cylinder () and eccentric shaft portion (), and a thrust bearing that supports a load of shaft () in a vertical direction. The thrust bearing includes an upper race in contact with a flange portion of shaft (), a lower race in contact with a thrust surface of cylinder block (), and a rolling element. An overall height of sealed container () is sized not to exceed a length six times larger than a diameter of piston ().

Sealed compressor and freezer device or refrigerator equipped with same

A closed compressor includes: a compressor body; and a closed vessel in which the compressor body is accommodated and oil is stored. The compressor body has an electric element and a compression element that is driven by the electric element. The compression element has a cylinder block that forms a cylinder, a piston that performs a reciprocating motion in the cylinder, and a crankshaft that actuates the piston. The cylinder block configures a bearing that pivotally supports the crankshaft. The cylinder forms a compression chamber. The compressor body has a support that forms a curved surface. A contact portion, at which the curved surface comes into contact with a receiving surface in the closed vessel, is formed.

Closed compressor and refrigeration device

A hermetic compressor () includes an electric element (), a compression element (), and a hermetic container (). The compression element includes a shaft (), a cylinder block (), a piston (), a connection section (), and an oil supply mechanism (). The piston has a columnar seal section () in sliding contact with an inner peripheral face of the cylinder, two extension sections () that have circular arc faces each having the same radius as a radius of the seal section and extend from the seal section to the bottom dead center side in the axial direction with a circumferential gap therebetween, and a columnar capture section () that extends further toward the bottom dead center side than the extension section and has a smaller radius than the radius of the seal section.

Hermetic compressor and refrigerator

A hermetic compressor includes a closed vessel for storing lubricating oil, an electric-driving element, and a compressing element driven by the electric-driving element. The compressing element includes a cylinder block forming a compression chamber, a piton that reciprocates inside the compression chamber, and an oiling device for supplying the lubricating oil to an outer circumference of the piston. A first oil groove is concavely formed on the outer circumference of the piston, and a second oil groove is concavely formed on a side opposite to the compression chamber relative to the first oil groove. The second oil groove has a spatial volume same or greater than that of the first oil groove. An expanded clearance portion is provided such that a clearance between the piston and the cylindrical hole portion broadens from a top dead point to a bottom dead point.

Hermetic compressor

A hermetic compressor includes: a main bearing () which supports a main shaft () of a shaft (); and a thrust ball bearing at an upper end portion of the main bearing (). A rotor () is fixed to the main shaft () via a flange. A rotor core () has a magnetic center displaced upward relative to the magnetic center of a stator core () so that a downward magnetic attractive force is applied between the rotor () and the stator (). Accordingly, a contact load between steel balls and upper and lower races in the thrust ball bearing is appropriately maintained.

A sealed compressor of the present invention comprises an electric component (); a compression component (); a sealed container () which accommodates the electric component () and the compression component () and stores lubricating oil () therein; and a suction pipe () which is provided to penetrate a wall portion of the sealed container (), and through which a refrigerant gas suctioned into the sealed container () flows; wherein the compression component () includes a compression chamber () formed within a cylinder () and a suction muffler () through which the refrigerant gas flows; wherein the suction muffler () includes a muffling space (), an exit pipe (), an inlet pipe (), whose suction port () opens in a substantially horizontal direction in the interior of the sealed container (), a funnel-shaped refrigerant receiver section () provided to surround the suction port (); and wherein the suction port () is placed such that its center (A) is located above than a center (A) of the refrigerant receiver section ().

Sealed compressor

Provided is a reciprocating compressor having a structure in which friction losses between a shaft and a bearing can be reduced without impairing the ability of the bearing to support the shaft. A reciprocating compressor () includes a cylinder (), a piston (), a connecting rod (), a shaft (), and a bearing (). The shaft () has a journal portion () as a portion covered by the bearing (). The journal portion () has a first journal portion () located closer to the connecting rod () with respect to a midpoint M of the journal portion () in a direction parallel to a rotational axis and a second journal portion () located farther from the connecting rod () with respect to the midpoint M. The bearing () has a first sliding portion () for supporting the first journal portion () and a second sliding portion () for supporting the second journal portion (). The first sliding portion () has a first recessed portion () in at least one range selected from a range of 0&#xb0; to 180&#xb0; and a range of 270&#xb0; to 360&#xb0; in a rotational direction of the shaft () from a reference position.

Reciprocating compressor

A hermetic compressor includes a thrust ball bearing () on the thrust face () of the main bearing (). The thrust ball bearing () includes balls () held in a holder (), an upper race () and a lower race () arranged respectively on and beneath the balls (), and an elastic support member () below the balls (). The hermetic compressor is prevented from causing a load to be applied unevenly to the balls (), thereby achieving high efficiency, low noise level, and high reliability.

There is disclosed a sealed compressor in which a compressive component housed inside of a sealed container comprises a block, a suction valve, a piston, and a suction muffler, the suction muffler including a muffler body defining a muffler space and an outlet tube communicating the muffler space with the suction valve, the outlet tube having a bent portion bent in a middle portion between an opening exposed to the muffler space and an opening in a vicinity of the suction valve, a first outlet tube portion extending from the bent portion toward the muffler space, and a second outlet tube portion extending from the bent portion toward the suction valve, wherein a close sided space is formed in a vicinity of the bent portion, the close sided space having one end in communication with the outlet tube and the other end closed.

Sealed compressor and refrigeration device

A compression element is provided with a block, a piston, a valve plate arranged in an opening end of a compression chamber and forming a suction hole, a suction valve, a suction muffler forming a sound absorbing space and provided with a communication pipe, and a cylinder head, the communication pipe has a suction muffler outlet portion communicated with the suction hole, is arranged in such a manner as to extend in a vertical direction with respect to a center line passing through the suction hole, and is arranged in such a manner that a part of the suction muffler outlet portion covers a part of the suction hole in the suction muffler outlet portion positioned in a downstream side of refrigerant gas flowing through the communication pipe, in the case of projection the suction muffler outlet portion in a direction of a center line.

A hermetic compressor has a hermetic container storing oil, and a compressing element accommodated in the hermetic container and compressing a refrigerant gas. The compressing element has a compression chamber, a cylinder forming the compression chamber, a piston inserted into the cylinder for reciprocation, and a suction muffler whose one end communicates with the compression chamber. The suction muffler has a sound deadening space, a gas flow forming part forming a gas flow flowing in a constant direction in the sound deadening space, and an oil discharge opening provided in a downstream side of the gas flow in a lower part of the sound deadening space. By this construction, there is realized a hermetic compressor in which the oil does not readily remain in the suction muffler, whose noise is lower, and whose performance is stabilized.

Growing community of inventors

Shiga, Japan

Ko Inagaki