Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Yasushi Hayashi

Makoto Katayama

Ko Inagaki

Hidenori Kobayashi

Kazuhiro Yokota

Yu Haraki

Masakazu Yamaoka

Tsuyoshi Matsumoto

Kazuhiko Ono

A sealed compressor according to the present invention comprises an electric element; a compression element; a sealed container; and a suction pipe. The compression element includes a compression chamber, a piston provided inside of the compression chamber, and a suction muffler communicating with the inside of the sealed container and the compression chamber. The suction muffler is laid out such that an opening portion thereof at the sealed container side faces an opening portion of the suction pipe at the sealed container side. The suction muffler includes: a hood section provided in the vicinity of the opening portion of the suction muffler to extend toward the inside of the sealed container, the hood section being configured to collect cooling medium gas discharged from the suction pipe; and an auxiliary hood fastened to the hood section and formed in a manner to increase a collection area of the hood section.

Sealed compressor

A sealed compressor comprises an electric element; a compression element; and a sealed container accommodating the electric element and the compression element; wherein the compression element includes a cylinder block defining a compression chamber; a piston which is reciprocatable inside the compression chamber; and a valve plate disposed to close an opening end of the compression chamber and having a discharge hole which provides communication between inside and outside of the compression chamber; the piston has a first groove on a tip end surface thereof which faces the valve plate, the first groove having a predetermined width and extending from an outer peripheral edge portion of the tip end surface toward a portion of the tip end surface which faces the discharge hole; and a tip end portion of the first groove is positioned in the portion of the tip end surface which faces the discharge hole and is inclined.

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.

An electric compressor includes a shaft with a forward leading groove and a reverse leading groove both engraved on its outer wall. When a motor rotates forward, the forward leading groove pumps up lubricant through a centrifugal pump thereby lubricating sliding sections of the compressor. The reverse leading groove has a lead directing opposite to that of the forward leading groove, and when the motor rotates reversely due to some reason, the reverse leading groove pumps up the lubricant through the centrifugal pump thereby lubricating the sliding sections.

Growing community of inventors

Shiga, Japan

Yasushi Hayashi