Hill Phoenix, Inc.

Lyman W Wycoff

Jules G Choueifati

Larry C Howington

A temperature-controlled display device includes a temperature-controlled space and a refrigeration circuit configured to provide cooling for the temperature-controlled space. The refrigeration circuit is configured to operate in multiple cooling modes including a normal refrigeration mode and an anti-ingression mode. A proximity sensor is configured to detect an object such as a human hand or forearm within a detection zone adjacent to a door handle of the temperature-controlled display device. A controller estimates a distance between the handle and the detected object using an input from the proximity sensor. The controller causes the refrigeration circuit to transition between the multiple cooling modes based on the estimated distance.

Refrigeration control using a door handle proximity sensor

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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Chester, VA, United States of America

Lyman W Wycoff