A refrigerant system capable of operating at multiple capacity modes includes an evaporator, a multi-stage compressor assembly, a first fluid flow path, a second fluid flow path, a first valve, and a second valve. The multi-stage compressor assembly has a first stage and a second stage. The first fl
A refrigerant system capable of operating at multiple capacity modes includes an evaporator, a multi-stage compressor assembly, a first fluid flow path, a second fluid flow path, a first valve, and a second valve. The multi-stage compressor assembly has a first stage and a second stage. The first fluid flow path extends from the evaporator to the first stage of the multi-stage compressor assembly. The second fluid flow path connects to the first fluid flow path and to the multi-stage compressor assembly between the first stage and the second stage.
대표청구항▼
1. A refrigerant system capable of operating at multiple capacity modes, the system comprising: an evaporator;a multi-stage compressor assembly having a first stage and a second stage;a first fluid flow path extending between the evaporator and the first stage;a second fluid flow path connected to t
1. A refrigerant system capable of operating at multiple capacity modes, the system comprising: an evaporator;a multi-stage compressor assembly having a first stage and a second stage;a first fluid flow path extending between the evaporator and the first stage;a second fluid flow path connected to the first fluid flow path and connected to the multi-stage compressor assembly between the first stage and the second stage;a first valve disposed along the first fluid flow path at or between the connection between the first fluid flow path and the second fluid flow path and the first stage, the first valve being arranged upstream from the multi-stage compressor assembly and responsive to control signals to selectively regulate flow of refrigerant to the first stage; anda second valve disposed along the second fluid flow path and responsive to control signals to selectively regulate flow of refrigerant along a bypass line;a heat exchanger, an economizer heat exchanger, and an expansion device;a main flow line extending from the multi-stage compressor assembly serially through the heat exchanger, economizer heat exchanger, and expansion device, and the evaporator;an economizer line connected to the main flow line and extending through the economizer heat exchanger to connect either directly to the bypass line or to the multi-stage compressor assembly between the first stage and the second stage;an economizer line valve disposed on the economizer line and movable between an open and closed position in response to control signals to selectively regulate flow of refrigerant along the economizer line;wherein the multiple capacity modes includes a first capacity mode and a second capacity mode, a capacity of the system in the first capacity mode being 150% the capacity of the system in the second capacity mode. 2. The system of claim 1, wherein the first valve is responsive to control signals to selectively regulate flow of refrigerant to the first stage of the multi-stage compressor assembly and the second valve is responsive to control signals to selectively regulate flow of refrigerant along the second fluid flow path to and from an inter-stage of the multi-stage compressor assembly. 3. The system of claim 2, wherein in the first capacity mode the first valve is open to allow refrigerant to the first stage, the second valve is closed, and the economizer line valve is open to allow for vapor injection of refrigerant between the first stage and second stage of the compressor assembly. 4. The system of claim 2, wherein in the second capacity mode the first valve is open to allow refrigerant to the first stage of the compressor assembly and the second and economizer line valves are closed. 5. The system of claim 2, wherein in a third capacity mode the first valve is open to allow refrigerant to the first stage, the second valve is open to allow a portion of the refrigerant to flow along the second fluid flow path, and the economizer line valve is closed. 6. The system of claim 2, wherein in a fourth capacity mode the first valve is closed and the second valve is open to allow the refrigerant to bypass the first stage, and the economizer line valve is closed. 7. The system of claim 2, wherein in a fifth capacity mode the first valve is closed and the second valve and economizer line valve are open. 8. The system of claim 2, wherein in a sixth capacity mode the first valve, second valve and economizer line valve are all open. 9. The system of claim 2, wherein the second fluid flow path is connected to the economizer line. 10. The system of claim 1, wherein the economizer line is connected to the main flow line between the heat exchanger and the economizer heat exchanger. 11. The system of claim 1, wherein the economizer line valve is disposed on the economizer line between the heat exchanger and economizer heat exchanger. 12. The system of claim 2, wherein the first valve, the second valve, and the economizer line valve are solenoid valves and a controller electrically connects to and selectively energizes the first valve, the second valve, and the economizer line valve to regulate the opening and closing of the valves. 13. The system of claim 1, wherein the multi-stage compressor assembly comprises a first compressor having a single compressive stage arranged in series with a second compressor having a single compressive stage. 14. The system of claim 13, wherein the first valve, the second valve, and the economizer line valve receive control signals and in response thereto are opened and/or closed in various combinations to provide the refrigerant system multiple capacity modes. 15. A method of operating a refrigerant system at multiple capacity modes, the method comprising: compressing a refrigerant in at least one of a first stage or a second stage in a multi-stage compressor assembly;vaporizing the refrigerant in an evaporator;providing a first fluid flow path extending from the evaporator to the first stage and a second fluid flow path connected to the first fluid flow path and extending to between the first stage and the second stage;disposing a first valve along the first fluid flow path at or between the connection between the first fluid flow path and second fluid flow path and the first stage, the first valve being arranged upstream from the multi-stage compressor assembly;operating the first valve to selectively allow for compression of the refrigerant in the first stage of the multi-stage compressor assembly;disposing a second valve along the second fluid flow path; andoperating the second valve to selectively allow the refrigerant to allow refrigerant to fluidly communicate with the multi-stage compressor assembly between the first stage and the second stage;operating an economizer line valve to selectively allow a portion of the refrigerant to pass from a main flow line between a heat exchanger and an economizer heat exchanger, through the economizer heat exchanger and be vapor injected into the multi-stage compressor assembly between the first stage and the second stage;wherein the first valve, second valve, and economizer valve are selectively controlled to open and/or close in various combinations to provide the multiple capacity modes, the multiple capacity modes including a first capacity mode and a second capacity mode such that a capacity of the refrigerant system in the first capacity mode is 150% the capacity of the refrigerant system in the second capacity mode. 16. The method of claim 15, further comprising: operating the economizer line valve to selectively allow a portion of the refrigerant to pass through the economizer heat exchanger and be vapor injected into the multi-stage compressor assembly between the first stage and the second stage. 17. The method of claim 15, wherein the first valve, the second valve, and the economizer line valve comprise solenoid valves that can be opened and/or closed in various combinations to provide the refrigerant system with at least one of six distinctive capacity modes. 18. The method of claim 16, wherein the multi-stage compressor assembly comprises a first compressor having a single compressive stage arranged in series with a second compressor having a single compressive stage.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (14)
Dormer Michael J. (Fabius NY) Kaido Peter F. (Verona NY), Capacity control for multi-stage compressors.
Lifson Alexander ; Karpman Boris, Method of optimizing cooling capacity, energy efficiency and reliability of a refrigeration system during temperature pull down.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.