Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Panasonic Appliances Refrigeration Devices Singapore

Noboru Iida

Kiyoshi Sawai

Akira Hiwata

Hiroyuki Fukuhara

Yoshiyuki Futagami

Atsushi Sakuda

Hidenobu Shintaku

Shigeru Muramatsu

Ko Inagaki

Hiroyuki Kawano

Tsuyoshi Karino

Ryuichi Ohno

Takashi Morimoto

Teruyuki Akazawa

Yoshinori Ishida

Tatsuya Nakamoto

Hirofumi Yoshida

Sadayuki Yamada

Shingo Oyagi

Hiroaki Nakai

Takeshi Hashimoto

Yutaka Ikeda

Masao Nakano

Hideki Murakami

Daisuke Funakoshi

Ryutan Akizuki

Hiroshi Sugiura

Takamasa Sakimoto

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

A hermetic compressor includes an electric motor element driving a compression element that includes a crankshaft including a main shaft, an eccentric shaft, and a flange, a cylinder block having a cylinder bore, and a piston configured to reciprocate in the cylinder bore. The crankshaft further includes a communicating oil supply passage provided in the flange, a main shaft oil supply passage, and an eccentric shaft oil supply passage.

Hermetic compressor and refrigeration device

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.

Hermetic compressor

An operation for reconnecting a mobile information terminal and a base unit, which is performed when a user returns home, is made easier, and a matter that has occurred in the base unit during his absence is displayed on the mobile information terminal. The mobile information terminal enters a sleep state when receiving no signal from the base unit. When the user performs a predetermined operation, the mobile information terminal returns from the sleep state, then searches for the base unit, and displays, on a display section, information relating to the matter that has occurred during his absence, the information being transmitted from the base unit when the terminal is reconnected to the base unit. Accordingly, the user can know, through a simple operation, the record of an incoming call received through a wired network, or an answering machine message that has occurred during his absence from the base unit.

Radio communication system and mobile information terminal

In a rotary compressor of a vane rotary type, an outer peripheral surface of an eccentric portion of a shaft on a side adjacent to a center of the shaft is located radially inwardly of an outer peripheral surface of a main shaft inserted in a main bearing and that of an auxiliary shaft inserted in an auxiliary bearing. Also, a back clearance means used in mounting a piston on the shaft is provided in each of an inner peripheral surface of the piston and the eccentric portion of the shaft. Such configurations can reduce a diameter of the eccentric portion. A reduction in diameter of the eccentric portion can reduce a viscous force of oil acting between the eccentric portion of the shaft and the inner peripheral surface of the piston to thereby reduce a rotational moment about a center of the eccentric portion of the shaft, which rotational moment acts on the piston in a direction of rotation of the shaft, thus making it possible to reduce a sliding loss that is generated by a reciprocating motion of a vane in a vane groove.

Rotary compressor

A scroll compressor employs therein a refrigerant having a small global warming potential and a small ozone depletion potential and mainly comprising hydrofluoroolefin having a carbon-carbon double bond. A stationary scroll has and end plate and a discharge port defined in the end plate at a central portion thereof so as to open into a discharge chamber. The stationary scroll also has a bypass hole defined in the end plate to allow a plurality of compression chambers to communicate with the discharge chamber before the compression chambers communicate with the discharge port. A check valve is provided on the bypass hole to allow the refrigerant to flow from the compression chambers to the discharge chamber. This construction can restrain a baneful influence on the global environment, reduce a temperature increase caused by excessive compression, and restrain decomposition of the refrigerant even in long-term use.

Scroll compressor with bypass holes

A compressor, characterized in that a steel is used as the base material for the other sliding material vaneand nitrided, a CrN or DLC film is formed on the surface by PVD treatment, and a Ni&#x2014;Cr&#x2014;Mo cast iron is used for the other corresponding sliding material piston. It is possible in such a configuration to suppress the temperature rise by sliding friction of the sliding materials, such as the vane tip regionand the peripheral region of pistonthat are vigorously slid, relax decomposition of the refrigerant, and suppress corrosion by hydrogen fluoride generated in reaction with water and oxygen, and thus to provide a compressor higher in reliability.

Compressor with steel and cast iron sliding materials

Lifetime required of mobile-use fuel cells is secured and prolonged, stabilized pump performance is maintained by preventing bearing seizure and abnormal wear. The shaft () of a pump mechanism section () and the shaft () of a motor section () are integrated, and the shafts () are supported by two or more ball bearings disposed in the pump mechanism section (), thereby making it possible to fill grease in the closed spaces of the ball bearings (), and secure a sufficient lifetime basically with almost no possibility of the grease leaking out, even if it is used at a relatively high environmental temperature.

Air pump

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 scroll compressor in which a scroll fixed lap rising from a fixed plate of a fixed scroll and a scroll orbiting lap rising from an orbiting plate of an orbiting scroll are combined with each other to form compression chambers therebetween, the fixed scroll is made of iron-based material, the orbiting scroll is made of aluminum-based material, at least the plate back surface of the orbiting scroll is subjected to surface processing.

Scroll compressor with surface processed orbiting scroll plate back surface

It is an object of the present invention to provide a vane rotary type air pump in which a pump mechanism and a drive motor are directly connected to each other and low noise is realized. In the vane rotary type air pump in which a cylinder (), a rotor () and a vane () are sandwiched between a front plate (not shown) and a rear plate (not shown), an opened end () of the vane groove () is provided in a reversed rotation direction region of the rotor () with respect to straight line connecting a center O of the rotor () and the closed end () of the vane groove (). That is, a 'stroke' type vane disposition is employed. With this noise of the air pump is reduced.

Oilless rotary vane pump having open ends of vane grooves being inclined rearward in the rotation direction

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

According to the present invention, an oil supply passage is formed in a suction space of a fixed scroll part, and an oil collision part is provided in the suction space. The oil collision part is provided in the suction space, an amount of oil to be supplied is controlled, refrigerant and lubricant oil are sufficiently mixed with each other. Tangents of ends of the oil collision part are made acute angle to smoothen the flow of the refrigerant.

Scroll compressor

A scroll compressor, whose back pressure is easily controlled and compression efficiency is high, is provided. The scroll compressor includes a plurality of compression chambers formed by engaging a fixed-scroll wrap and an orbiting-scroll wrap, and a back pressure chamber formed at an opposite side of the orbiting-scroll wrap of a orbiting-scroll. The scroll compressor additionally includes a high pressure chamber and a middle pressure chamber, which are formed by dividing the back pressure chamber using a seal. Moreover, the scroll compressor includes a first path for supplying lube oil from the high pressure chamber to the middle pressure chamber, and a second path for supplying the lube oil from the middle pressure chamber to an suction chamber of the compression chambers. The first path is intermittently opened by orbit of the orbiting-scroll.

Growing community of inventors

Shiga, Japan

Noboru Iida