초록 ▼

A method of optimizing the design of a chiller involves placing more emphasis on the chiller's performance at part load than at full load and rating the chiller accordingly. In some embodiments, compressor speed and impeller diameter are chosen to optimize the chiller's performance at part load. Wit

A method of optimizing the design of a chiller involves placing more emphasis on the chiller's performance at part load than at full load and rating the chiller accordingly. In some embodiments, compressor speed and impeller diameter are chosen to optimize the chiller's performance at part load. With the chosen impeller diameter, operation at full load is then achieved by increasing compressor speed, opening inlet guide vanes, and perhaps sacrificing some efficiency. If necessary, an inverter over speeds the compressor by driving it at a speed beyond that which the compressor would normally run if it were driven at the nominal line frequency of the electrical power feeding the inverter.

대표청구항 ▼

A method of optimizing the design of a chiller involves placing more emphasis on the chiller's performance at part load than at full load and rating the chiller accordingly. In some embodiments, compressor speed and impeller diameter are chosen to optimize the chiller's performance at part load. Wit

A method of optimizing the design of a chiller involves placing more emphasis on the chiller's performance at part load than at full load and rating the chiller accordingly. In some embodiments, compressor speed and impeller diameter are chosen to optimize the chiller's performance at part load. With the chosen impeller diameter, operation at full load is then achieved by increasing compressor speed, opening inlet guide vanes, and perhaps sacrificing some efficiency. If necessary, an inverter over speeds the compressor by driving it at a speed beyond that which the compressor would normally run if it were driven at the nominal line frequency of the electrical power feeding the inverter. energizing said water valve and continuing said alternate cooling routine. 2. A method according to claim 1, wherein a timer is initiated upon the initiation of said alternate cooling routine and said alternate cooling routine is terminated when said timer reaches said predetermined time. 3. A method of maximizing ice production with an alternate cooling routine in a refrigeration appliance having a freezer compartment with an ice making device therein, comprising a mold for receiving water in which to form ice bodies and an ice storage bin, and a fresh food compartment, said fresh food compartment and said freezer compartment being cooled by means of a refrigeration system including an evaporator in thermal communication with said freezer compartment and said fresh food compartment and an evaporator fan, driven by an evaporator fan motor, arranged to direct a stream of air over said evaporator and through said freezer compartment and ice making device and said fresh food compartment, comprising the steps of: monitoring a fill level of said ice storage bin and when it is detected that the fill level is below a predetermined full level, dispensing a charge of water into said mold; initiating said alternate cooling routine by energizing said evaporator fan motor for a sufficient period of time to freeze said water in said mold, controlling a temperature in said freezer compartment by energizing and de-energizing said compressor, controlling a temperature in a fresh food compartment by selectively allowing and preventing said air stream from passing through said fresh food compartment, dispensing said ice bodies from said mold to said storage bin upon a completion of said sufficient period of time, and determining whether said storage bin is filled and if so, terminating said alternate cooling routine and if not, redispensing said charge of water into said mold and continuing said alternate cooling routine. 4. A method according to claim 3, wherein said ice making device further comprises a water supply and an electronically controlled water supply valve and said step of dispensing a charge of water into said mold comprises energizing said water supply valve for a time sufficient to fill said mold a desired amount. 5. A method according to claim 3, wherein said freezer compartment includes a temperature selection input device and a first temperature sensor and said step of controlling a temperature in said freezer compartment comprises comparing a signal from said first temperature sensor with a signal from said temperature selection input device and energizing said compressor when said signal from said first temperature sensor indicates that a temperature in said freezer compartment is above a temperature selected by said temperature selection input device. 6. A method according to claim 5, wherein said fresh food compartment includes a second temperature selection input device and a second temperature sensor and said step of controlling a temperature in said fresh food compartment comprises comparing a signal from said first temperature sensor with a signal from said second temperature selection input device and opening an air flow passage in a circuit between said evaporator and said fresh food compartment when said signal from said second temperature sensor indicates that a temperature in said fresh food compartment is above a temperature selected by said second temperature selection input device. 7. A method according to claim 6, wherein said circuit includes said freezer compartment. 8. A method according to claim 3, wherein said fresh food compartment includes a temperature selection input device and a temperature sensor and said step of controlling a temperature in said fresh food compartment comprises comparing a signal from said temperature sensor with a signal from said temperature selection input device and opening an air flow passage in a circuit between said evaporator and said fresh food compartment wh