Sanyo Electric Co., Ltd.

Takashi Harako

Kazuya Sato

Takahiro Nishikawa

Hiroshi Nishikawa

Takayuki Mizuno

Yasuo Sakamoto

Eiji Fukuda

Tetsuya Kato

The purpose of the present invention is to provide a multi-cylinder compressor permitting to increase a gas inflow into the housing without enlarging the intake ports of the bearing plate. The bearing platebearing the crankshaftis provided with plural intake portsat regular intervals in the circumferential direction. The substantially inversely-dished cover memberis mounted on the top of the bearing plate, and it not only covers the plural intake ports, but also forms a sealed space S between the cover member and the bearing plate, and is further provided with an introducing openinglarger than the intake portat the center top of the cover member. The introducing openingis fitted with the gas supply pipeto be connected to the gas supply source (not illustrated).

Multi-cylinder compressor having plural intake ports in a bearing plate and a cover member forming a sealed space over the bearing plate

A reciprocating compressor of un-lubricating type, equipped with a cooling device including a cooling fan beneath a motor and provided with four gas compressors, each having a cylinder and a piston. The pistons of each gas compressor cooperate by converting a rotating motion of a crankpin of a crankshaft provided on an electric drive source via two yokes having a phase difference of 90 degrees therebetween to a reciprocating motion by a scotch yoke mechanism. The flows of compressed gases from each gas compressor are joined to one place by connecting tubes to be discharged. The lengths of each connecting tube are selected such that pressure waves of the compressed gases compete with each other at the joining point for a time period encompassing one rotation of the crankpin, whereby a pulsation resulting from gas flow discharged in concentration is decreased.

Reciprocating compressor

A reciprocating compressor provided with a plurality of gas compression means having a cylinder and a piston. The piston of each gas compression means is cooperated with the compressor by converting a rotating motion of a crankshaft provides on an electric drive source to a reciprocating motion by a scotch yoke mechanism. A cylindrical attachment portion of a flywheel has an outer diameter corresponding to an inner diameter of a rotor shaft hole of the electric drive source, and the cylindrical attachment portion of the flywheel is inserted into the rotor shaft hole to contact with a lower end surface of the crankshaft. The fly wheel may be fastened to the crankshaft via a fastening bolt.

Flywheel attachment for a compressor motor

A plurality of gas compression means including a cylinder and a piston in which the piston is cooperated with a compressor by conversion of the rotating motion of a crankshaft provided on a driving source to a reciprocating motion using a scotch yoke mechanism. An expansion muffler is attached to an outlet port of at least one of the gas compression means. Four gas compression means are disposed in opposite one another in a cross shape. Gases compressed by three of the gas compression means are discharged into a cylinder head of the other gas compression means by a connecting tube, and are joined with the flow of gas compressed by the other gas compression means, to be discharged in concentration from the cylinder head of the other gas compression means. The expansion muffler is attached to the outlet port of the cylinder head of the other gas compression means.

Reciprocating parallel flow compressor with discharge muffler

A reciprocating compressor provided with a plurality of gas compression means having a cylinder and a piston, the piston of each gas compression means is cooperated with the, compressor by converting a rotating motion of a crankshaft provided on an electric drive source to a reciprocating motion by a scotch yoke mechanism, wherein an increase of the volume of discharged gas can be achieved without designing a gas compression means to be wide or without increasing the number thereof, a pulsation of discharged gas can be decreased by an attachment of an expression muffler on the cylinder head so as to decrease a vibration and noise of the compressor, an attachment of the fly wheel to the crankshaft and an adjustment of the shaft with the crankshaft can be improved easily, further compressed gas flows are joined and discharged in concentration, thereby the pulsation of discharged gas can be restrained.

Growing community of inventors

Osaka-fu, Japan

Takashi Harako