Power failure controller for an electronically controlled...

Details Power failure controller for an electronically controlled... Power failure controller for an electronically controlled...

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 49/02 (2006.01)

Patent

CA 2696105

The present application relates to a power failure controller for an electronically controlled expansion valve in a refrigeration system. The valve is controlled by a valve controller configured to close the valve as a part of a power-up routine when the valve controller is first powered-up from a powered-down state. The power failure controller includes a circuit configured to allow the valve controller to enter the powered-down state when a power failure is detected and to subsequently provide power to the valve controller from a capacitor bank coupled to the circuit so that the valve controller conducts the power-up routine and closes or mostly closes the valve.

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