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公开(公告)号：US20210348819A1
公开(公告)日：2021-11-11
申请号：US16868707
申请日：2020-05-07
申请人： Hill Phoenix, Inc.
摘要： A refrigerated display case having a housing defining a temperature controlled space and a refrigeration system coupled to the housing is provided. The refrigeration system is configured to be operable to affect a temperature of the temperature controlled space. The refrigeration system includes an actuator, a controller, and a sensor. The controller is configured to continuously update a stored position of the actuator based on measurement of an electric current provided to the actuator, retrieve the stored position after a power failure, and restart control based on the stored position of the actuator. The sensor is configured to communicate with the controller.
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公开(公告)号：US20210348818A1
公开(公告)日：2021-11-11
申请号：US16868730
申请日：2020-05-07
申请人： Hill Phoenix, Inc.
IPC分类号： F25B49/00 , F25B41/06 , F25B40/06 , G01M13/003
摘要： A method of detecting electrical failure in a refrigeration system is provided. The method includes determining whether a present superheat of the refrigeration system is between a maximum superheat and a minimum superheat for the refrigeration system, the maximum superheat and the minimum superheat defining a normal operating range. The method also includes detecting an electrical property of an expansion valve assembly of the refrigeration system responsive to the superheat being outside the normal operating range. The method further includes determining whether the expansion valve assembly as experienced an electrical failure based on at least the electrical property. A signal indicating that the expansion valve has experienced an electrical failure is generated based on a determination that the expansion valve assembly has experienced the electrical failure.
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