Patent ID: 7207184
Filing Date: 2007-04-24
Classification: F25B

Abstract:
1. A method for regulating a most loaded circuit in a multi circuit refrigeration system comprising the steps of: a. providing a refrigeration system having a compressor rack including at least one compressor and two or more circuits, each of the circuits including at least one refrigeration case and having an electronic evaporation pressure regulator valve coupled to the circuit; b. providing at least one controller in communication with the electronic evaporation pressure regulator valves for monitoring each circuit, including sensor dependant signals, in particular temperature signals and for issuing command signals to the electronic evaporator pressure regulator valves and the at least one compressor; c. calculating a load signal for each circuit based on said monitored sensor dependant signals; d. comparing the load signals for each circuit and determining the most loaded circuit; e. adjusting the electronic evaporation pressure regulator valve associated with the most loaded circuit to be approximately 100 percent open and controlling a suction pressure of the at least one compressor in response to commands issued from the at least one controller in order to move a circuit temperature of the most loaded circuit to a target temperature; and f. repeating steps c through e after a predetermined period of time.