Patent ID: 8973385
Filing Date: 2015-03-10
Classification: A47F,F25B,F25D

Abstract:
1. A temperature controlled case, comprising: an enclosure defining an airspace for receiving products therein; a refrigeration system configured to circulate a refrigerant through an expansion device and at least one cooling element to cool the airspace in one of a low temperature cooling mode and a medium temperature cooling mode; and a control module configured to determine whether the case is intended to operate as a low temperature case associated with the low temperature cooling mode of the refrigeration system or a medium temperature case associated with the medium temperature mode of the refrigeration system, the control module having a first predetermined setpoint corresponding to the low temperature cooling mode and a second predetermined setpoint corresponding to the medium temperature cooling mode; wherein when the control module receives a signal representative of the refrigeration system operating in the low temperature cooling mode, the control module applies the corresponding predetermined first setpoint to modulate a position of the expansion valve to continuously operate the case as the low temperature case, and wherein when the control module receives a signal representative of the refrigeration system operating in the medium temperature cooling mode, the control module applies the corresponding predetermined second setpoint to modulate a position of the expansion valve to continuously operate the case as the medium temperature case.