초록 ▼

A system for providing industrial gas to a use point in relatively small quantities that would otherwise require the use of high pressure gas cylinders, wherein industrial gas is generated from a feed, liquefied using refrigeration generated by a refrigeration system, and stored in a storage vessel

A system for providing industrial gas to a use point in relatively small quantities that would otherwise require the use of high pressure gas cylinders, wherein industrial gas is generated from a feed, liquefied using refrigeration generated by a refrigeration system, and stored in a storage vessel prior to provision to the use point. The preferred refrigeration system is a pulse tube system powered by gas associated with the industrial gas generation system.

대표청구항 ▼

A system for providing industrial gas to a use point in relatively small quantities that would otherwise require the use of high pressure gas cylinders, wherein industrial gas is generated from a feed, liquefied using refrigeration generated by a refrigeration system, and stored in a storage vessel

A system for providing industrial gas to a use point in relatively small quantities that would otherwise require the use of high pressure gas cylinders, wherein industrial gas is generated from a feed, liquefied using refrigeration generated by a refrigeration system, and stored in a storage vessel prior to provision to the use point. The preferred refrigeration system is a pulse tube system powered by gas associated with the industrial gas generation system. comprising: a controller operatively coupled to the damper, the evaporator fan and the fresh food fan, said controller configured to: accept a plurality of control parameter inputs; determine a state of the refrigeration system in a two-dimensional logic control grid based upon the control parameter inputs; and execute an optimal control algorithm for the determined state of the refrigeration system, wherein to execute the optimal control algorithm said controller configured to continue to change the determined state to operate the refrigeration system in a new state until the new state reaches a steady state, the new state having parameters that are different than parameters of the control parameter inputs, the change being based on a set of rules, and the steady state being a state in which the fresh food and the freezer compartments are maintained at target temperatures. 9. A control system in accordance with claim 8, said controller comprising a processor, said processor configured to read data corresponding to a fresh food compartment condition and data corresponding to a freezer compartment condition. 10. A control system in accordance with claim 9, said processor configured to read a fresh food compartment temperature, a freezer compartment temperature, and at least one of an evaporator fan parameter, a fresh food fan parameter, a damper parameter, and a sealed system parameter. 11. A control system in accordance with claim 8 said controller comprising a memory, said memory loaded with said two-dimensional logic grid, said grid configured to contain a selected number of states. 12. A control system in accordance with claim 11 wherein said grid comprises a first axis and a second axis, said first and said second axis of said grids comprising a plurality of partitions, said partitions defining said control grid states. 13. A control system in accordance with claim 8, said controller configured to: input a fresh food compartment temperature and a freezer compartment temperature; and locate an applicable state in said control grid based upon the inputted fresh food compartment temperature and the freezer compartment temperature. 14. A control system in accordance with claim 13, said inputs comprising at least one of an evaporator fan parameter, a fresh food fan parameter, a damper parameter, and a sealed system parameter. 15. A method for controlling a refrigeration system, the refrigeration system including a fresh food compartment and a freezer compartment with a damper establishing flow communication therebetween, a sealed system for forcing cold air through the refrigerator compartments, the sealed system including an evaporator fan and a fresh food compartment fan, the refrigerator further including a controller operatively coupled to the damper, the evaporator fan and the fresh food fan, said method comprising the steps of: accepting a plurality of control inputs; determining a state of the refrigeration system in a two-dimensional logic control grid based upon the control parameter inputs, the grid including a first axis and a second axis; executing an optimal control algorithm for the determined state of the refrigeration system; and configuring the control grid to contain a selected number of states, wherein said step of configuring comprises the step of partitioning the first axis according to ranges of fresh food compartment temperature, the ranges defined by a fresh food compartment lower target temperature, a fresh food compartment upper target temperature, and at least one of a fresh food compartment minimum allowable temperature, a fresh food compartment alarm temperature and a fresh food compartment high temperature. 16. A method in accordance with claim 15 wherein said step of configuring the control grid comprises the step of partitioning the second axis according to ranges of freezer compartment temperature, the ranges defined by a freezer compartment lower target temperature, a fr