Hermetically sealed compressor and method of manufacturing the same

• US 7,632,082 B2
• Filed: 01/11/2008
• Issued: 12/15/2009
• Est. Priority Date: 03/17/2005
• Status: Active Grant

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Hiruma, Yoshiaki, Kogure, Yoshihisa, Sawabe, Hiroyuki, Nishikawa, Takahiro, Hara, Masayuki, Ogasawara, Hirotsugu
• Primary Examiner(s): Trieu; Theresa
• Application Number:
  US11/972,731
• Publication Number:
  US 20080112831A1
• Time in Patent Office: 704 Days
• Field of Search: 418/11, 418/60, 418/63, 418/88, 418/94, 418/102, 418/DIG.1, 418/270, 184 616- 618
• US Class Current: 418/99
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 29/023 Lubricant distribution through a hollow driving shaft F04C29/025 takes precedence
• CPC Class Codes: F04C 29/028 Means for improving or restricting lubricant flow

Abstract

In a hermetically sealed compressor 100 including a rotary compressing element (4) having at least one cylinder (43A, 43B), and a roller (45) provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element (2) for driving the roller (45) and a hermetically sealed container in which the rotary compressing element and the electrically-driven element are accommodated, oil (8) being stocked in the hermetically sealed container (1), the oil (8) in the hermetically sealed container (1) is injected into the compression chamber (43) when refrigerant is sucked into the compression chamber (43) of the cylinder.

Claims

1. A hermetically sealed compressor for compressing refrigerant, comprising:

a rotary compressing element including at least two cylinders, each cylinder having a compression chamber for compressing the refrigerant and a roller that is provided in the cylinder so as to be freely eccentrically rotatable;

an electrically-driven element for driving the roller;

a hermetically sealed container for accommodating the rotary compressing element and the electrically-driven element therein, oil being stocked in the hermetically sealed container;

an oil supply device for supplying oil stocked in the hermetically sealed container to a rubbing portion between the electrically-driven element and the rotary compressing element;

an oil stocking portion disposed between the cylinders and proximate the rubbing portion; and

an oil path for leading the oil supplied from the oil stocking portion to the compression chamber in connection with a suction of refrigerant into the compression chamber of the cylinder.

2. The hermetically sealed compressor according to claim 1, wherein the cross-section area of the oil path is determined so that a ratio between the cross-section area of the oil path and the displacement volume of the compression chamber is between 0.004 to 0.030 mm²/cc.

3. The hermetically sealed compressor according to claim 1, further comprising a plate-shaped member sandwiched by the cylinders.

4. The hermetically sealed compressor according to claim 3, wherein the oil path comprises a primary oil path including a groove formed into at least one of an upper and a lower surface of the cylinders and a secondary oil path extending from the oil stocking portion to the groove through the plate-shaped member.

5. The hermetically sealed compressor according to claim 1, wherein the oil supply device includes a spiral oil flow path, the oil supply device being integrally rotatable with the electrically-driven element such that the oil stocked in the hermetically sealed container is drawn upwards through the spiral flow path by the rotation of the electrically-driven element.

6. A hermetically sealed compressor for compressing refrigerant, comprising:

a rotary compressing element including at least two cylinders, each having a compression chamber for compressing the refrigerant and a roller that is provided in the cylinder so as to be freely eccentrically rotatable;

an electrically-driven element for driving the roller;

a hermetically sealed container for accommodating the rotary compressing element and the electrically-driven element therein, oil being stocked in the hermetically sealed container;

a primary oil path formed into the cylinder for supplying oil to a low-pressure side of the compression chamber in connection with the suction of the refrigerant into the compression chamber of the cylinder,

wherein the ratio between the cross-section area of the oil path and the displacement volume of the compression chamber is between 0.004 to 0.030 mm²/cc;

an oil supply device for supplying the oil stocked in the hermetically sealed container to a rubbing place between the electrically-driven element and the rotary compressing element;

an oil stocking portion that is disposed proximate the rubbing portion to stock the oil supplied from the oil supply device and to supply the oil to the primary oil path;

a plate-shaped member sandwiched by the cylinders; and

a first oil path extending from the oil stocking portion to the primary oil path through the plate-shaped member.

7. The hermetically sealed compressor according to claim 6, wherein the oil supply device includes a spiral oil flow path, the oil supply device being integrally rotatable with the electrically-driven element such that the oil stocked in the hermetically sealed container is drawn upwards through the spiral flow path by the rotation of the electrically-driven element.