Gas compressor with discharge section and sub-discharge section

Patent metadata

Field	Value
Publication number	US-9751384-B2
Application number	US-201214358507-A
Country	US
Kind code	B2
Filing date	Nov 22, 2012
Priority date	Nov 24, 2011
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

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.

First claim

The invention claimed is:

1. A gas compressor, comprising:
a hollow cylinder member;
a rotor rotatably disposed inside the hollow cylinder member;
a plurality of vanes attached to the rotor in a projectable and houseable manner, the plurality of vanes including leading ends which are in contact with an inner circumferential surface of the hollow cylinder member, so as to define a plurality of compression rooms inside the hollow cylinder member, wherein:
a cylinder room which changes a volume of each of the plurality of compression rooms, and performs a gas compression cycle is defined between the hollow cylinder member and the rotor,
a suction section which sucks the gas is upstream of the cylinder room,
a discharge section which discharges the gas is downstream of the cylinder room,
a proximal section in which the hollow cylinder member and the rotor come closest to each other is in one position between the hollow cylinder member and the rotor, so that the cylinder room is defined and is a single cylinder room which performs the gas compression cycle one time per one cycle for each of the plurality of compression rooms, the cylinder room has an asymmetric shape such that a distant section in which the inner circumferential surface of the hollow cylinder member is furthest apart from an outer circumferential surface of the rotor is located upstream of a position to which the proximal section faces across a rotation center of the rotor in a rotation direction,
at least one sub-discharge section, which maintains discharge pressure of the gas by releasing pressure of one of the plurality of compression rooms when the pressure of the gas in the one of the plurality of compression rooms reaches the discharge pressure, is upstream of the discharge section,
an interval between the at least one sub-discharge section and the discharge section adjacent to the at least one sub-discharge section is the same as or narrower than an interval between leading ends of an adjacent two of the plurality of vanes, and
in a state in which a downstream one of the adjacent two of the plurality of vanes faces the discharge section, the at least one sub-discharge section is in a position closer to an upstream one of the adjacent two of the plurality of vanes than the downstream one of the adjacent two of the plurality of vanes.

2. The gas compressor according to claim 1 , wherein the at least one sub-discharge section is disposed such that an interval along the inner circumferential surface of the hollow cylinder member between closest end portions of the discharge section and the at least one sub-discharge section next to each other along the rotation direction is shorter than an interval along the inner circumferential surface of the hollow cylinder member between contact points where the leading ends of the adjacent two of the plurality of vanes along the rotation direction are in contact with the inner circumferential surface of the hollow cylinder member.

3. The gas compressor according to claim 1 , wherein the at least one sub-discharge section includes a first sub-discharge section and a second sub-discharge section adjacent to the first sub-discharge section,
an interval between the first sub-discharge section and the second sub-discharge section is the same as or narrower than the interval between the leading ends of the adjacent two of the plurality of vanes, and
in a state in which the downstream one of the adjacent two of the plurality of vanes faces the first sub-discharge section, the second sub-discharge section is in a position closer to the upstream one of the adjacent two of the plurality of vanes than the downstream one of the adjacent two of the plurality of vanes.

4. The gas compressor according to claim 1 , wherein the at least one sub-discharge section includes a first sub-discharge section and a second sub-discharge section next to each other along the rotation direction and,
an interval along the inner circumferential surface of the hollow cylinder member between closest end portions of the first sub-discharge section and the second sub-discharge section next to each other along the rotation direction is shorter than an interval along the inner circumferential surface of the hollow cylinder member between contact points where the leading ends of the adjacent two of the plurality of vanes along the rotation direction are in contact with the inner circumferential surface of the hollow cylinder member.

5. The gas compressor according to claim 1 , wherein the at least one sub-discharge section is disposed such that a total of an opening area of the discharge section and an opening area of the at least one sub-discharge section becomes equal to or larger than an entire opening area of a smaller one of the discharge section and the at least one sub-discharge section when an axis of a downstream facing surface of the upstream one of the adjacent two of the plurality of vanes is overlapped with the at least one sub-discharge section or has contact with an upstream end portion of the at least one sub-discharge section and an axis of an upstream facing surface of the downstream one of the adjacent two of the plurality of vanes is overlapped with the discharge section or has contact with a downstream end portion of the discharge section.

6. The gas compressor according to claim 5 , wherein the at least one sub-discharge section is in a position where the entire at least one sub-discharge section and the entire discharge section are simultaneously open after the axis of the upstream facing surface of the downstream one of the adjacent two of the plurality of vanes has passed through the entire discharge section and before the axis of the downstream facing surface of the upstream one of the adjacent two of the plurality of vanes passes over the at least one sub-discharge section.

7. The gas compressor according to claim 1 , wherein the at least one sub-discharge section is in a position such that a center of an opening of the at least one sub-discharge section is downstream of an axis of a downstream facing surface of an upstream one of the adjacent two of the plurality of vanes when an axis of an upstream facing surface of a downstream one of the adjacent two of the plurality of vanes passes through a center of an opening of the discharge section.

8. The gas compressor according to claim 1 , wherein the distant section is between the proximal section and a position 90 degrees from the proximal portion in the rotation direction.

Assignees

• Calsonic Kansei Corp

Inventors

• Shimaguchi Hirotada
• Hirono Kouji
• Tsuda Masahiro
• Osaki Tatsuya
• Kaneko Shizuma

Classifications

• F01C21/0863

  the fluid being the working fluid · CPC title

• F04C18/3441

  the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation · CPC title

• F04C28/28

  Safety arrangements; Monitoring · CPC title

• F04C2250/30

  of the stator · CPC title

• F04C18/3442

  the surfaces of the inner and outer member, forming the inlet and outlet opening · CPC title