A method and controller for a refrigerant pressure effecting component of a cooling system includes providing closed loop control over a pressure effecting component based on an error signal, performing a control algorithm that includes at least one programmably adjustable gain factor, and adaptably
A method and controller for a refrigerant pressure effecting component of a cooling system includes providing closed loop control over a pressure effecting component based on an error signal, performing a control algorithm that includes at least one programmably adjustable gain factor, and adaptably changing the programmably adjustable gain factor by periodically generating a new gain factor. More specifically, the system and method includes monitoring fluctuation in the error signal and generating a numeric value indicative of the percent fluctuation in the error signal over a predetermined period of time, then fuzzifying a numeric value to generate a set of fuzzy input values. A predetermined set of rules are applied to the fuzzy input values to generate a set of fuzzy output values, which are then defuzzified by a combining operation to yield the new gain factor.
대표청구항▼
A method and controller for a refrigerant pressure effecting component of a cooling system includes providing closed loop control over a pressure effecting component based on an error signal, performing a control algorithm that includes at least one programmably adjustable gain factor, and adaptably
A method and controller for a refrigerant pressure effecting component of a cooling system includes providing closed loop control over a pressure effecting component based on an error signal, performing a control algorithm that includes at least one programmably adjustable gain factor, and adaptably changing the programmably adjustable gain factor by periodically generating a new gain factor. More specifically, the system and method includes monitoring fluctuation in the error signal and generating a numeric value indicative of the percent fluctuation in the error signal over a predetermined period of time, then fuzzifying a numeric value to generate a set of fuzzy input values. A predetermined set of rules are applied to the fuzzy input values to generate a set of fuzzy output values, which are then defuzzified by a combining operation to yield the new gain factor. the cooling capacity decreasing as the amount of diverted refrigerant is increased, whereby variable cooling capacity can be achieved without the need to repeatedly adjust the operation of the compressor. 4. A method as described in claim 1, wherein the pressure differential accommodating device is a vacuum generator that creates an evaporator exit pressure substantially lower than the evaporator inlet pressure whereby the evaporator capacity is enhanced. 5. A method as described in claim 1, wherein the pressure differential accommodating device is a vacuum generator that creates a compressor inlet pressure that is higher than the evaporator inlet pressure whereby the pressure lift across the compressor is reduced. 6. A method of operating a zoned refrigeration system with increased efficiency, the system being comprised of a primary refrigerant path including a compressor, a condenser, a primary expansion device, and a plurality of parallel-connected evaporator units located respectively to serve the zones of the space being refrigerated, the components being connected together to form a closed loop system with a refrigerant circulating therein, the method comprising the steps of: separately controlling the flow of refrigerant from the expansion device to each of the evaporator units so that refrigerant only flows through evaporator units which are required to provide cooling at a given time; diverting a portion of the refrigerant exiting the condenser into a bypass refrigerant line; passing the diverted refrigerant through a secondary expansion device in the bypass line; passing the refrigerant exiting the secondary expansion device through a heat exchanger thermally coupled to the primary refrigerant path between the compressor outlet and the condenser inlet to remove heat from the discharge vapor from the compressor, whereby the refrigerant exiting the compressor is at or near its saturation temperature; passing the refrigerant in the bypass path exiting the heat exchanger and the refrigerant exiting the evaporator through a pressure differential accommodating device that mixes two vapors at different pressures; and feeding the refrigerant exiting the pressure differential accommodating device to an inlet of the compressor, the quantity of refrigerant diverted to the bypass line being a predetermined minimum amount necessary to reduce the temperature of the refrigerant exiting the compressor to or near to its saturation temperature, plus an additional amount sufficient to reduce the cooling capacity to a decreased level if required at a given time, whereby variable cooling capacity can be achieved without the need to repeatedly adjust the operation of the compressor. 7. A refrigeration system comprising: a compressor, a condenser, an expansion device, and an evaporator, connected together to form a closed loop system with a refrigerant circulating therein; and a bypass path coupled between an outlet of the condenser and an inlet of the compressor, the bypass path including: a heat exchanger thermally coupled between an outlet of the compressor and an inlet of the condenser; and a pressure differential accommodating device having a first inlet connected to the outlet of the heat exchanger, a second inlet connected to the outlet of the evaporator, and an outlet connected to the inlet of the compressor, the heat exchanger being operative to reduce the temperature of refrigerant exiting the compressor from a superheated temperature to a temperature which is approximately equal to the saturation temperature, thereby reducing the condenser pressure, and consequently, the pressure lift at the compressor, and the compressor work. 8. A refrigeration system as described in claim 7, further including a valve at the inlet end of the bypass path, the valve being adjusted to divert between approximately 10 and approximately 15 percent of the mass flow of the refrigerant exiting the condenser into the bypass path. 9
Suzuki Shinichi (Kariya JPX) Ban Takashi (Kariya JPX) Fukanuma Tetsuhiko (Kariya JPX) Yoshida Tetsuo (Kariya JPX), Apparatus for varying capacity of scroll type compressor.
Szynal Joseph M. (Laporte IN) Maddix Beth A. (Lincoln Township ; Berrien County MI) Guess Ronald W. (Evansville IN), Fuzzy logic adaptive defrost control.
Hindmon ; Jr. James O. (110 Old Hickory La. Powder Springs GA 30073) Hindmon ; Sr. Phillip G. (210 Maple Dr. Cedartown GA 30125), Fuzzy logic based controller for cooling and refrigerating systems.
Alsenz Richard H. (1545 Industrial Rd. Missouri City TX 77489), Method and apparatus for controlling capacity of multiple compressors refrigeration system.
Hagita Naomi (Shimizu JPX) Mizuno Takao (Shimizu JPX), Overheat preventing method for prescribed displacement type compressor and apparatus for the same.
Schaeffer Wayne G. (Ballwin MO) Wehmeier William C. (St. Charles MO) Broccard Terry J. (St. Louis MO) Behr John A. (Defiance MO), Strategic modular commercial refrigeration.
Pham, Hung M.; Singh, Abtar; Caillat, Jean-Luc; Bass, Mark, Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor.
McCollough, Thomas W.; Watts, Russell; Hall, David L.; Comsa, Cornel; Schenk, Dennis; Candeo, Marcelo; Hansen, Dennis Carl, Ice maker control system and method.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.