Matsushita Refrigeration Company

Panasonic Corporation

Takahide Nagao

Makoto Katayama

Takeshi Kojima

Takashi Kakiuchi

Hirotaka Kawabata

Yoshinori Ishida

Akira Nakano

Akihiko Kubota

Hironari Akashi

Kenji Kinjo

Terumasa Ide

Seigo Yanase

Junichiro Yabiki

Hiroshi Sasano

Kosuke Tsuboi

Toshihiko Ota

Takafumi Horiguchi

A Inlet pipe () communicating the space inside the hermetic enclosure with sound absorbing space () of inlet muffler () is provided so as to be inclined downward from inlet-pipe inlet () toward inlet-pipe outlet (). Outlet pipe () communicating sound absorbing space () with an inlet valve includes outlet-pipe inlet () and outlet-pipe outlet (). Inlet-pipe inlet () and outlet-pipe inlet () are formed at substantially same height. Herewith, introducing a refrigerant gas to outlet-pipe inlet () making efficient use of potential energy of the refrigerant improves the compression efficiency and stabilizes the performance of the compressor.

Hermetic compressor

A refrigerating compressor includes a compressing element and a hermetic container accommodating the compressing element, which includes a compressing chamber where refrigerant gas is compressed, and a suction muffler () having a sound deadening space () and communicating with the compressing chamber. The suction muffler () includes a tail tube () having a first end open into the hermetic container and a second end open into the sound deadening space (), and a resonating chamber () formed attached to the tail tube () and having a resonance frequency substantially agreeing with a specific resonance frequency of the hermetic container. This structure allows the resonating chamber () to deaden the noises coming from vibration sounds of a suction valve or ripple sounds of refrigerant gas.

Refrigerating compressor

A refrigerant compressor includes a compressor section, driver, a first contact section and a second contact section. The compressor section is accommodated in a closed container for compressing refrigerant gas. The driver drives the compressor section. The first and second contact sections are brought into contact with each other or they slide with each other by driving the compressor section. On the surface of each one of the contact sections, at least one of plural recesses uniformly placed or a mixed layer, to which molybdenum disulfide (MoS) is bound, is formed. The foregoing structure allows increasing the abrasion resistance of the first and second contact sections.

Refrigerant compressor, and refrigerating machine using the same

A hermetic electric compressor is capable of efficiently pumping up a necessary amount of lubricating oil even at low-speed rotation and has a simple constitution to provide an excellent workablity in assembling. The hermetic electric compressor includes an oil pump. The oil pump includes (i) a slanting channel formed in the lower portion of a main shaft and slanting from the lower portion to the upper portion thereof outwardly, (ii) a throttle formed at the bottom end of the main shaft and having an inlet port of diameter smaller than the section of the slanting channel at the center thereof, and (iii) a lower communicating passage for providing a communication between the bottom end of a spiral groove and the slanting channel. This constitution is capable of effectively lift the head of the lubricating oil.

Sealed type electrically driven compressor

A closed motor-driven compressor includes a closed vessel containing a lubricating oil collected in a bottom portion thereof, a compression section accommodated in the closed vessel, and a motor section accommodated in the closed vessel for driving the compression section. The compression section includes a crankshaft driven by the motor section and having a lower end submerged in the lubricating oil, and a block for rotatably supporting the crankshaft. The block has a cylinder formed therewith and having an open end. The block also has a rib formed therewith, a generally flat shoulder portion formed on one side of the cylinder, and a leg formed below the generally flat shoulder portion. The compression section also includes a cylinder head secured to the rib for covering the open end of the cylinder. An oil guide is formed with the block for guiding to the bottom portion of the closed vessel a lubricating oil that is sucked up from the lower end of the crankshaft, caused to spout out from the upper end of the crankshaft, and collected on the generally flat shoulder portion. The oil guide prevent the oil from dropping on and flowing over a suction muffler disposed below the rib, and also prevents the oil from dropping directly on the bottom portion of the closed vessel.

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Kanagawa, Japan

Takahide Nagao