Hermetically sealed compressor

• US 20060210408A1
• Filed: 03/16/2006
• Published: 09/21/2006
• 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, Kogure, Yoshihisa, Hashimoto, Akira, Hara, Masayuki, Ogasawara, Hirotsugu, Yoshida, Hiroyuki
• Granted Patent: US 7,581,936 B2
• Time in Patent Office: Days
• US Class Current: 417/410.300
• 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 23/001 of similar working principle
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 28/08 characterised by varying the rotational speed
• CPC Class Codes: F04C 29/02 Lubrication of machines or engines in general F01M; Lubricant separation separation in general B01D

Abstract

A hermetically sealed rotary compressor 100 including an electrically-driven element 2, a rotary compressing element 4 equipped with a cylinder 41 having a compression chamber 43 and a hermetically sealed container 1 in which oil 8 is stocked, is equipped with and oil path 62 for injecting the oil 8 into the compression chamber 43 when refrigerant is sucked into the compression chamber 43, and an opening/closing valve 80 for opening/closing the oil path 62 in accordance with the discharge pressure of the rotary compressing element 4 of the pressure of the compressed refrigerant compressed by the rotary compressing element 4.

Claims

1. A hermetically sealed compressor comprising:

an electrically-driven element;

a rotary compressing element driven by the electrically-driven element to compress refrigerant;

the rotary compressing element having at least one cylinder including a compression chamber in which the refrigerant is compressed;

a hermetically sealed container in which the electrically-driven element and the rotary compressing element are accommodated and oil is stocked,

an oil path for injecting the oil into the compression chamber when the refrigerant is sucked into the compression chamber of the cylinder constituting the rotary compressing element; and

an opening/closing valve for opening/closing the oil path in accordance with the refrigerant discharge pressure of the rotary compressing element or the pressure of the compressed refrigerant compressed by the rotary compressing element.

2. The hermetically sealed compressor according to claim 1, wherein the opening/closing valve is opened/closed in accordance with the differential pressure between the refrigerant suction pressure and the reference discharge pressure of the compression chamber, and set to an open state when the differential pressure is low.

3. The hermetically sealed compressor according to claim 1, wherein the opening/closing valve is opened/closed in accordance with the pressure of the compressed refrigerant, and is set to an open state when the pressure of the compressed refrigerant is low.

4. The hermetically sealed compressor according to claim 3, further comprising a compressed refrigerant introducing path for applying the pressure of the compressed refrigerant discharged from the discharge pipe of the hermetically sealed container to the opening/closing valve.

5. A hermetically sealed compressor including an electrically-drive element, a rotary compressing element that is driven by the electrically-driven element and has at least one cylinder including a compression chamber in which the refrigerant is compressed, and a hermetically sealed container in which the electrically-driven element and the rotary compressing element are accommodated, further comprising:

an oil supply pipe for supplying oil;

an oil path that is connected to the oil supply pipe and injects the oil into the compression chamber when the refrigerant is sucked into the compression chamber; and

an electromagnetic valve that is provided to the oil supply pipe and opened/closed in accordance with a driving frequency of the rotary compressing element.

6. The hermetically sealed compressor according to claim 5, wherein the electromagnetic valve is set to an open state when the rotary compressing element is set to a low load power area.

7. The hermetically sealed compressor according to claim 5, wherein the oil is stocked in the hermetically sealed container and the oil is supplied to the oil path through the oil supply pipe.

8. The hermetically sealed compressor according to claim 5, further comprising a refrigerant circuit having an oil separator, wherein the oil supply pipe is connected to the oil separator, and the oil separated from the refrigerant by the oil separator is led through the oil supply pipe to the oil path.

9. The hermetically sealed compressor according to claim 8, further comprising a pressure reducing unit that is provided between the oil separator and the electromagnetic valve and reducing the pressure of the oil supplied from the oil separator.