Matsushita Refrigeration Company

Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Matsushita Reika Co., Ltd.

Hidetoshi Nishihara

Akihiko Kubota

Masahiko Osaka

Manabu Motegi

Kazuhito Noguchi

Takeshi Kojima

Toshihiko Ota

Hiroki Awashima

Masahiro Kakutani

Tsuyoshi Matsumoto

Makoto Katayama

Hideki Kawai

Tsuyoshi Ishida

Katsumi Endo

Ichiro Kita

Koji Hamaoka

Ikutomo Umeoka

Hidehisa Tanaka

Tatsuyuki Iizuka

Shuichi Yakushi

Seishi Nakaoka

Tomio Maruyama

Akio Yagi

Yuji Saiki

Yasushi Hayashi

Tomonori Ouchiyama

Yasuhisa Takahashi

Koushi Hamada

A compressor includes a motor driven by a controller and having a rotor and a stator, a compressing unit driven by the motor in a hermetic container in which refrigerant is filled. Driving the motor at a low rpm, the controller practices a feedback control which determines a timing of turning on/off switching elements based on a signal detecting a position of the rotor, and when the motor is driven at a high rpm, the controller practices an open-loop control which outputs a given frequency and drives the motor synchronizing with the given frequency. This structure achieves a compressor working with a fewer noises in PWM driving.

Electric compressor

In a method for assembling an electric compressor which contains a rotor having built-in magnets, magnets in a pre-magnetization state are inserted into a plurality of slots of a magnetizing jib made with a nonmagnetic material. After magnetizing the magnets, the magnetizing jib is fitted to the rotor to have the magnets transferred into magnet slots. A magnetizing method and an assembly method for implementing high reliability electric compressors at low manufacturing cost is implemented.

Magnetizing method using a magnetizing jig and method of assembling an electric compressor by using the jig and the magnetizing method

In a hermetic compressor in a freezing refrigerating system or an air-conditioning system such as a refrigerator or a showcase, a construction is disclosed for intending to provide a low-noise hermetic compressor by effectively attenuating a pressure pulsation having occurred in a compression chamber with a suction muffler. By this construction, since a muffler coverhas a planar simple shape, the deformation upon molding becomes little and it can come into fully close contact with a muffler main body. Therefore, the pressure pulsation hardly leaks through the connecting portion between the muffler main bodyand the muffler cover. The full silencing effect that the suction mufflerhas is obtained and thereby noise can be reduced more effectively.

Hermetic compressor and freezing air-conditioning system

This invention relates to a hermetic compressor used on a refrigerant cycle such as a refrigerator, and discloses a low noise compressor designed to attenuate a resonance sound in a compression chamber and intake pressure pulsing more operatively at a position adjacent to their sources, which intake pressure pulsing occurs at an intake valve port. In the compressor, a resonance spaceis provided adjacent to the intake valve portthat is closer in distance to a noise source. As a result, noise can be reduced more operatively than muffling functions of an intake mufflerdo. In addition, although acoustic characteristics of the intake muffleramplify noises having specific frequencies, such noises can be attenuated before being amplified.

Hermetic compressor with an improved cylinder head-suction muffler assembly

The present invention provides an hermetic electric compressor capable of stably supplying oil to a compression chamber with a low noise level. The hermetic electric compressor has a closed vessel, an electric element, a compressing element that is disposed over the electric element and driven by the electric element, and an oil reservoir. The hermetic electric compressor also has an oil supply mechanism for supplying the oil from the oil reservoir to the compressing element in the closed vessel, and a suction muffler that communicates with a refrigerant suction part for sucking a refrigerant into the compressing element and is formed of a box body having a predetermined spatial volume. The suction muffler is positioned below the position where the oil is supplied into the closed vessel, and the box body has at least one oil suction port used for sucking a predetermined amount of oil.

Hermetic electric compressor having a suction muffler

A sealed electric compressor for use in, for example, an electric refrigerator, generates a little noise and can feed any moving part of its compressing element with refrigerator lubricant. An oil pickup tube is joined by insertion to the lowermost end of a crank shaft and includes a first centrifugal pumping portion and a second centrifugal pumping portion provided continuously and arranged at a smaller angle than that of the first centrifugal pumping portion. The second centrifugal pumping portion arranged at a smaller angle can spin in a pool of the refrigerator lubricant.

Closed type electric compressor

In a hermetic compressor for use on an air-conditioning unit as well as a refrigerating unit such as a refrigerator and a showcase, there is disclosed a constitution designed to provide a silently operated hermetic compressor that has an intake muffler readily assembled thereon. The hermetic compressor including a substantially disk-like elastic member disposed between the intake muffler at an outlet thereof and a cylinder head is provided, in which an outlet orifice of the intake muffler constantly remains pressed against an intake valve port through a gasket.

Closed compressor

A sealed type motor compressor includes a motor section, a compressor section, a sealed enclosure for resiliently supporting therein the motor section and the compressor section, a suction pipe extending through the sealed enclosure, a suction muffler mounted on the compressor section, an insert pipe received at its one end in an inlet port with a slight clearance therebetween, and a closely coiled spring in the form of a cylinder for interposing between the suction pipe and the insert pipe. A communication pipe is adapted to extend through an aperture formed in the muffler and to be forcedly fitted into a suction port formed in a cylinder head, thereby serving to connect the muffler to the cylinder head.

Sealed type motor compressor

Growing community of inventors

Fujisawa, Japan

Hidetoshi Nishihara