ROTARY COMPRESSOR

• US 20110027117A1
• Filed: 07/28/2010
• Published: 02/03/2011
• Est. Priority Date: 07/31/2009
• Status: Abandoned Application

• Current Assignee: Fujitsu General Company Limited (Fujifilm Holdings Corporation)
• Original Assignee: Fujitsu General Company Limited (Fujifilm Holdings Corporation)
• Inventors: Tanaka, Junya, Ueda, Kenshi, Fujino, Masaki, Morozumi, Naoya, Morishita, Taku
• Application Number:
  US12/845,351
• Publication Number:
  US 20110027117A1
• Time in Patent Office: Days
• US Class Current: 418/88
• CPC Class Codes: F04C 18/3564 the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
• CPC Class Codes: F04C 2230/60 Assembly methods
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 29/025 using a lubricant pump

Abstract

According to one embodiment, a rotary compressor includes a compressor housing, a compressing unit, a motor, and an oil supply mechanism. The compressor housing has an inlet and an outlet of refrigerant. The compressing unit compresses refrigerant sucked in from the inlet. The motor drives the compressing unit through a rotation shaft. The oil supply mechanism supplies lubricant oil to the compressing unit through an oil supply hole of the rotation shaft. The oil supply mechanism includes a housing hole, a pump case, and a pump vane. The housing hole is communicated with the oil supply hole. The pump case is fitted in the housing hole. The pump vane is housed in the pump case, and includes a large width portion which is locked by the upper inner surface of the pump case.

Claims

1. A rotary compressor comprising:

a hollow compressor housing that is provided with an inlet and an outlet of refrigerant;

a compressing unit that is located in a lower part of the compressor housing to compress refrigerant sucked in from the inlet;

a motor that is located in an upper part of the compressor housing to drive the compressing unit through a rotation shaft; and

an oil supply mechanism that supplies lubricant oil retained in a lower part of the compressor housing to a sliding portion of the compressing unit through an oil supply hole of the rotation shaft, wherein the oil supply mechanism includes

a housing hole that has an opening in a lower end of the rotation shaft and is communicated with the oil supply hole,

a pump case that includes a lubricant oil inlet in a lower end and an opening in an upper end, the pump case configured to be fitted in the housing hole, and

a pump vane that has a plate-like shape and is housed in the housing hole and the pump case, the pump vane including a large width portion at a longitudinal center, which is locked by an upper inner surface of the pump case.

2. The rotary compressor according to claim 1, wherein a longitudinal end portion of the pump vane housed in the pump case is configured to be in contact with an inner surface of the pump case to position the pump vane.

3. The rotary compressor according to claim 2, wherein a longitudinal end portion of the pump vane housed in the housing hole is separate from an inner surface of the housing hole.

4. The rotary compressor according to claim 1, wherein the longitudinal center of the pump vane bulges in at least one width direction to form a bulge that allows the large width portion to have a width equal to or wider than an inner diameter of the pump case.

5. The rotary compressor according to claim 4, wherein an inclined portion is formed between the bulge and a side of the pump vane.

6. The rotary compressor according to claim 1, wherein the pump vane is twisted by a predetermined degree in a circumference direction and is made of a material that allows the pump vane to be elastically deformable in a direction in which the pump vane is twisted.

7. The rotary compressor according to claim 1, wherein the pump case is deformable at least in a radial direction.