Calsonic Kansei Corporation

Masahiro Tsuda

Hirotada Shimaguchi

Tatsuya Osaki

Kouji Hirono

Shizuma Kaneko

Toshikatsu Miyaji

Kazumichi Okano

A gas compressor includes a block part inside which a cylinder chamber is formed; a rotor rotatably housed in the cylinder chamber; and vanes provided on an outer circumferential portion of the rotor. The block part has a pressure supply part configured to supply pressure to backpressure spaces behind the vanes. This pressure supply part has an intermediate-pressure supply part which communicates with each backpressure space from an intake cycle to a compression cycle in the compression chamber, a first high-pressure supply part which communicates with the backpressure space from the compression cycle to a discharge cycle in the compression chamber, and a second high-pressure supply part which is formed between the intermediate-pressure supply part and the first high-pressure supply part independently of the first high-pressure supply part and which communicates with the backpressure space in a middle of the compression cycle in the compression chamber.

Gas compressor having block and pressure supply parts communicating with backpressure space

A gas compressor includes at least two first and second discharge ports () which are provided at an upstream side in a rotation direction of a rotor () along a peripheral direction of an inner peripheral surfaceof a cylinder () with respect to a closest area (proximity part ()) where the inner peripheral surface () of the cylinder () and an outer peripheral surface () of the rotor () are closest in a range of one revolution of a rotation shaft () and configured to discharge the refrigerant gas compressed in compression chambers (). Of the first and second discharge ports (), on only the first discharge port () closest to the proximity part (), a cutout groove portion () is provided at a downstream-side edge portion of the first discharge port () in the rotation direction of the rotor ().

Gas compressor

A gas compressor includes a cylinder member, a rotor, and a plurality of vanes, wherein a proximal section is provided between the cylinder member and the rotor, so that a single cylinder room which performs a refrigerant gas compression cycle one-time per one rotation of the rotor is defined, and at least one sub-discharge section which maintains pressure of the refrigerant gas in a compression room in discharge pressure by releasing pressure of the compression room when the pressure of the refrigerant gas in the compression room reaches the discharge pressure.

Gas compressor with discharge section and sub-discharge section

A compressor body is formed such that a compression chamber is divided by a rotor, a cylinder, side blocks and vanes, a housing which covers the compressor body is included, and an outline shape of a cross section of an inner circumferential surface of the cylinder is formed such that, in a period of one rotation of the rotor, (i) a region in which a capacity of the compression chamber increases, (ii) a region in which the capacity of the compression chamber reduces, (iii) a region in which a capacity reduction rate of the compression chamber is smaller than a capacity reduction rate of the region (ii), and (iv) a region in which the capacity reduction rate of the compression chamber is larger than a capacity reduction rate of the region (iii) are consecutively provided in order.

A compressor () has a compressor main body () formed so that one stroke cycle is performed in a compression room () which is partitioned by a rotor (), cylinder (), side blocks (), and vanes () during one revolution of the rotor (). A cyclone block () separates a refrigerant oil (R) from refrigerant gas (G), wherein a second discharge section () which discharge the refrigerant gas (G) when the pressure inside the compression room () reaches the discharge pressure before the compression room () faces a first discharge section () is formed, and a communicating path () which connects a discharge chamber () in the first discharge section () and a discharge chamber () in the second discharge section () is formed on the upper stream side from the cyclone block ().

In a gas compressor, an outline shape of an inner peripheral surface () of a cylinder () is set such that in a point before a first compression chamber (B) adjacent to a second compression chamber (A) in an upstream side in a rotational direction (W) is exposed to a discharge hole () of a primary discharge portion () with rotation of a rotor () in the rotational direction (W) (point where the first compression chamber (B) is positioned upstream of an angular position of being exposed to the discharge hole () of the primary discharge portion ()), a pressure of refrigerant gas (G) inside the compression chamber () reaches a discharge pressure. Therefore, the discharge hole () of the primary discharge portion () always discharges the refrigerant gas (G) from the compression chamber ().

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Saitama, Japan

Masahiro Tsuda