Patent ID: 8375734
Filing Date: 2013-02-19
Classification: F25B,F25C,F25D,Y02B

Abstract:
1. A method of controlling a refrigeration system comprising the steps of: sensing a first refrigerant temperature at an exit of an evaporator over a first period of time; providing a first valve located at a point before the inlet of the evaporator; repeatedly adjusting a first control for a variable degree of opening of the first valve by using the first refrigerant temperature to operate an initial refrigerant loading of the evaporator; comparing the first refrigerant temperature to the first period of time to calculate a first slope; comparing the first slope to at least one of a first minimum slope setting, a first target slope setting, or a first maximum slope setting to repeatedly adjust the first control of the first valve; wherein the first valve operates at the first control until the refrigerant at the exit of the evaporator reaches a first refrigerant temperature target; and repeatedly adjusting a second control for a variable degree of opening of the first valve of the opening of the first valve between a fully closed position and a fully open position for operating a post-initial refrigerant loading state of the evaporator by evaluating the first refrigerant temperature and the first slope subsequent to the refrigerant at the exit of the evaporator reaching the first refrigerant temperature target and the initial refrigerant loading being completed.