IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0079929
(2005-03-14)
|
등록번호 |
US-7563085
(2009-07-29)
|
우선권정보 |
JP-2004-073229(2004-03-15); JP-2004-191210(2004-06-29) |
발명자
/ 주소 |
- Sakaniwa, Masazumi
- Hashimoto, Akira
- Hara, Masayuki
- Nishikawa, Takahiro
- Ogasawara, Hirotsugu
- Suda, Akihiro
|
출원인 / 주소 |
|
대리인 / 주소 |
Weingarten, Schurgin, Gagnebin & Lebovici LLP
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
5 |
초록
▼
A compressor includes two rotary compressing elements in a vessel. One of the compressing elements operates while the other element is in a non-operating mode. In the non-operating mode, inflow of refrigerant gas into the cylinder of the rotary compressing element is blocked and a suction side press
A compressor includes two rotary compressing elements in a vessel. One of the compressing elements operates while the other element is in a non-operating mode. In the non-operating mode, inflow of refrigerant gas into the cylinder of the rotary compressing element is blocked and a suction side pressure of the rotary compressing element is applied as a back pressure to a vane. A compressing system includes the compressor and a controller and operates in first and second operation modes. In the first operation mode, refrigerant gas flows into a cylinder and an intermediate pressure, a result of flow of the refrigerant gas from between a vane and a guide groove into a back pressure portion, between a suction side pressure and a discharge side pressure, is applied as a back pressure to bias the vane against a roller.
대표청구항
▼
What is claimed is: 1. A multicylinder rotary compressor comprising: a closed vessel; a refrigerant discharge pipe having a first end inside of the closed vessel; first and second rotary compressing elements provided in said closed vessel; said first rotary compressing element including a first cyl
What is claimed is: 1. A multicylinder rotary compressor comprising: a closed vessel; a refrigerant discharge pipe having a first end inside of the closed vessel; first and second rotary compressing elements provided in said closed vessel; said first rotary compressing element including a first cylinder with a first roller configured to rotate in said first cylinder and a first vane accommodated by a first guide groove formed in said first cylinder to compress a refrigerant gas, said first vane being biased against said first roller by a first spring member; said second rotary compressing element including a second cylinder with a second roller configured to rotate in said second cylinder and a second vane accommodated by a second guide groove formed in said second cylinder to compress a refrigerant gas; wherein the second rotary compressing element is not provided with a spring member that biases the second vane against said second roller; wherein each of the first and second rotary compressing elements has a suction side input and a pressure side output; a back pressure pipeline having a first end communicating with a back pressure chamber formed on a back surface side of the second vane; a motor coupled to said first and second rotary compressing elements, said motor configured to rotate said first and second rotary compressing elements; an accumulator tank a first refrigerant pipeline having a first end inserted into an upper portion of the accumulator tank; a first refrigerant introduction pipe having a first end communicating with the suction side input of the first rotary compressing element and a second end opened in the accumulator tank; a second refrigerant introduction pipe having a first end communicating with the suction side input of the second rotary compressing element and a second end opened in the accumulator tank; a second refrigerant pipeline having a first end coupled to a midway portion of the first refrigerant pipeline and a second end coupled to the back pressure pipeline through a first valve; a third refrigerant pipeline having a first end coupled to a midway portion of the refrigerant discharge pipe and second end coupled to the back pressure pipe through a second valve; and a controller coupled to the motor and configured to control a rotating speed of said motor and said first and second rollers, said controller also configured to operate said first and second valves, wherein said controller is configured to operate in a first mode of operation and open the first valve unit and close the second valve unit to cause the second refrigerant pipeline to communicate with the back pressure pipeline such that a part of the suction side refrigerants of the first and second rotary compressing elements, which flow in the first refrigerant pipeline and flow into the accumulator tank, enter the second refrigerant pipeline and flow into the back pressure chamber formed on the back surface side of the second vane through the back pressure pipeline, whereby suction side pressures of both of the first and second rotary compressing elements are applied as the back pressure of the second vane, and wherein said controller is configured to operate in a second mode of operation and close the first valve unit and open the second valve unit to cause the refrigerant discharge pipe and the back pressure pipeline to communicate with each other and a part of the discharge side refrigerants of the first and second rotary compressing elements, which are discharged from the closed vessel and pass through the refrigerant discharge pipe, pass through the third refrigerant pipeline and flow into the back pressure chamber through the back pressure pipeline and the discharge side pressures of the first and second rotary compressing elements are applied as the back pressure of the second vane. 2. A multicylinder rotary refrigerant gas compressor comprising: a closed vessel; a rotary compressing element provided in said closed vessel, said rotary compressing element including first and second compressing elements; said first compressing element having a first cylinder with a first roller configured to rotate in said first cylinder and a first vane accommodated in a first guide groove formed in said first cylinder, said first vane being biased against said first roller by a spring member; said second compressing element having a second cylinder with a second roller configured to rotate in said second cylinder and a second vane accommodated in a second guide groove formed in said second cylinder; a motor operating element coupled to said first and second rollers, said motor operating element configured to rotate said first and second rollers; a communicating pipe having one end opened into said closed vessel and an other end opened in a back pressure portion of the second vane; a branch pipe having one end coupled to a mid portion of the communicating pipe; a three-way valve attached to a branch point of the branch pipe; a controller coupled to the motor operating element and configured to control a rotating speed of said motor operating element and said first and second rollers, said controller also configured to operate said three-way valve; wherein said controller is configured to operate said motor operating element at a first rotating speed, and when operating at said first rotating speed, said controller configures said three-way valve to introduce refrigerant gas compressed by said rotary compressing element in said closed vessel through said communicating pipe to a back pressure portion of said second vane in said second rotary compressing element to press said second vane on said second roller whereby said second rotary compressing element in operation; and wherein said controller is configured to operate said motor operating element at a second rotating speed, said second rotating speed being less than said first rotating speed, and when said controller operates said motor operating element at the second rotating speed, said controller configures said three-way valve to relieve refrigerant gas compressed by said rotary compressing element in the closed vessel to said branch pipe through said communicating pipe thereby shutting off the introduction of refrigerant gas into the back pressure portion of the second vane and wherein said second vane is not pressed onto said second roller thereby operating only said first rotary compressing element. 3. A compressing system comprising: a closed vessel; a refrigerant discharge pipe having a first end inside of the closed vessel; a driving element having a rotating shaft provided in said closed vessel; first and second rotary compressing elements, driven by said driving element and said rotating shaft of said driving element, provided in said closed vessels; said first rotary compressing element comprising a first cylinder, a first roller fitted in an eccentric portion formed in said rotating shaft, and which eccentrically rotates in said first cylinder, a first vane accommodated by a respective guide groove formed in said first cylinder, which abuts on the first roller to define the inside of said first cylinder between a low pressure chamber side and a high pressure chamber side to compress a refrigerant gas, said first vane being biased against said first roller by a spring member; said second rotary compressing element comprising a second cylinder, a second roller fitted in an eccentric portion formed in said rotating shaft, and which eccentrically rotates in said second cylinder, a second vane accommodated by a respective guide groove formed in said second cylinder, which abuts on the second roller to define the inside of said second cylinder between a low pressure chamber side and a high pressure chamber side to compress a refrigerant gas, wherein the second rotary compressing element is not provided with a spring member that biases the second vane against said second roller; wherein each of the first and second rotary compressing elements has a suction side input and a pressure side output; a back pressure pipeline having a first end communicating with a back pressure chamber formed on a back surface side of the second vane; an accumulator tank; a first refrigerant pipeline having a first end inserted into an upper portion of the accumulator tank; a second refrigerant pipeline having a first end coupled to a midway portion of the first refrigerant pipeline and a second end coupled to the back pressure pipeline through a first valve; a third refrigerant pipeline having a first end coupled to a midway portion of the refrigerant discharge pipe and a second end coupled to the back pressure pipeline through a second valve; a first refrigerant introduction pipe having a first end communicating with the suction side input of the first rotary compressing element and a second end opened in the accumulator tank; a second refrigerant introduction pipe having a first end communicating through a third valve with the suction side input of the second rotary compressing element and a second end opened in the accumulator tank; a controller coupled to the motor operating element and configured to control a rotating speed of said motor operating element and said first and second rollers, said controller also configured to operate said first, second and third valves; wherein said controller is configured to operate in a first mode of operation to operate said motor operating element at a first rotating speed, and to open said third valve and close the first and second valves such that the refrigerant gas passes into the second cylinder and an intermediate pressure, which is reached by a flow of some amount of the refrigerant gas in the second cylinder from between the second vane and the guide groove into the back pressure portion connected to the back pressure pipeline between a suction side pressure and a discharge side pressure of the rotary compressing elements is applied as a back pressure to bias the second vane against the second roller. 4. The compressing system of claim 3, wherein: said controller is further configured to operate in a second mode of operation wherein said controller operates said motor operating element at a second rotating speed, and opens the first valve and closes the second and third valves thus the inflow of the refrigerant gas into said second cylinder is blocked and a suction side pressure of said first rotary compressing element is applied as a back pressure of said second vane to be pressed to the back pressure portion side which is a side opposite to the second roller by a pressure of the refrigerant gas in said second cylinder being greater than a pressure of the refrigerant gas in a suction side of both of the first and second rotary compressing elements.
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