HERMETICALLY SEALED COMPRESSOR AND METHOD OF MANUFACTURING THE SAME

• US 20080112831A1
• Filed: 01/11/2008
• Published: 05/15/2008
• 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: Nishikawa, Takahiro, Hara, Masayuki, Hiruma, Yoshiaki, Ogasawara, Hirotsugu, Kogure, Yoshihisa, Sawabe, Hiroyuki
• Granted Patent: US 7,632,082 B2
• Time in Patent Office: Days
• US Class Current: 418/97
• 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 one 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; and

a hermetically sealed container for accommodating the rotary compressing element and the electrically-driven element therein, oil being stocked in the hermetically sealed container, wherein the oil stocked in the hermetically sealed container is injected into the compression chamber when the refrigerant is sucked into the compression chamber in the cylinder.

2. :

The hermetically sealed compressor according to claim 1, further comprising 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, and an oil path for leading the oil supplied from the oil supply device to the compression chamber in connection with the suction of the refrigerant into the compression chamber of the cylinder.

3. :

The hermetically sealed compressor according to claim 2, further comprising an oil stocking portion that is disposed at the rubbing portion to stock the oil supplied from the oil supply device and supplies the oil to the oil path.

4. :

The hermetically sealed compressor according to claim 2, further comprising a bearing member that is disposed in the hermetically sealed container to support the cylinder, and supports a rotating shaft extending from the electrically-driven element, wherein the oil path has a through hole penetrating through the bearing member so as to extend from the rotational shaft side to the outer peripheral surface of the bearing member, and when the bearing member is welded and fixed to the hermetically sealed container from the outside of the hermetically sealed container, an opening end of the through hole at the outer peripheral surface side of the bearing member is closed by the welded portion.

5. :

The hermetically sealed compressor according to claim 1, further comprising a primary bearing member and a secondary bearing member that sandwich the cylinder therebetween and support a rotating shaft extending from the electrically-driven element, and an oil path for leading oil stocked in the hermetically sealed container to the compression chamber, wherein, the oil path comprises a groove formed within at least one of the contact face between cylinder and the primary bearing member and the contact face between the cylinder and the secondary bearing member, and the oil stocked in the hermetically sealed container is led through the oil path to the compression chamber in connection with the suction of the refrigerant into the compression chamber of the cylinder.

6. :

The hermetically sealed compressor according to claim 5, wherein the groove is formed at the cylinder side.

7. :

The hermetically sealed compressor according to claim 1, wherein the rotary compressing element has two cylinders.

8. :

The hermetically sealed compressor according to claim 7, further comprising a plate-shaped member sandwiched by the two cylinders, and an oil path for leading oil stocked in the hermetically sealed container to the compression chamber, wherein the oil path comprises a groove formed within the contact face between at least one of the cylinders and the plate-shaped plate, and the oil stocked in the hermetically sealed container is led through the oil path to the compression chamber in connection with the suction of the refrigerant into the compression chamber of the cylinder.

9. :

The hermetically sealed compressor according to claim 1, wherein the cross-section area of the oil path is determined so that the ratio between the cross-section area of the oil path and the displacement volume of the compression chamber is within a predetermined range.

10. :

The hermetically sealed compressor according to claim 2, further comprising a fit-in piece that is loosely fitted in a passage of the oil path, wherein the amount of the oil to be injected into the compression chamber is adjustable on the basis of the size of the clearance between the passage of the oil path and the fit-in piece.

11. :

The hermetically sealed container according to claim 10, wherein the oil path comprises a secondary oil path for leading the oil supplied to the rubbing place to at least one of the upper and lower surfaces of the cylinder, a vertical hole penetrating through the cylinder in the vertical direction and intercommunicating with the secondary oil path, and an injection port that intercommunicates with the vertical hole and is opened to the inner surface of the cylinder, and the fit-in piece is loosely fitted in the vertical hole.

12. :

The hermetically sealed compressor according to claim 10, wherein the size of the clearance is determined on the basis of the displacement volume of the compression chamber.

13-14. -14. (canceled)