A refrigeration device has an electrical device part which emits noise during operation. A controller operates the electrical device part in a normal operating power range. A noise sensor detects an intensity of the emitted noise from the electrical device part. The controller is configured to change an operating power of the electrical device part within the normal operating power range and to determine a minimum value of the noise intensity which is detected by the noise sensor and to determine a noise-reduced operating power in order to operate the electrical device part at the noise-reduced operating power.

Operating a vapor compression system including determining a total heat delivered by the vapor compression system, determining a total electrical energy consumed by the vapor compression system while delivering heat, maintaining a total electrical energy consumed by the vapor compression system during a defrosting cycle, determining a cumulative coefficient of performance of the vapor compression system based on the total heat delivered, the total electrical energy consumed by the vapor compression system while delivering heat, and the total electrical energy consumed by the vapor compression system during the defrosting cycle, and initiating a defrosting cycle based the cumulative coefficient of performance.

A display case includes multiple walls that define an inner volume, a door, a door actuator, a gesture sensor, and a controller. The door is transitionable between an open position for access to the inner volume and a closed position. The door actuator is configured to transition the door between the open position and the closed position. The gesture sensor is configured to detect a gesture performed by a user. The controller includes a processing circuit configured to obtain sensor data from the gesture sensor that indicates the gesture performed by the user. The processing circuit is further configured to determine if the user has performed a reference gesture using the sensor data. The processing circuit is further configured to operate the door actuator to transition the door between the open position and the closed position in response to determining that the user has performed the reference gesture.

A refrigerator light-sensing system capable of saving energy and reducing noise comprising a refrigerator, a lower door hinge cover arranged at the lower end of the refrigerator, and a light-sensing device installed in the lower door hinge cover. The light-sensing device is electrically connected to the refrigerator through a wireless transmission or a wire connection mode. The light-sensing device is internally provided with a light-sensing element, a power supply module, a controller, a refrigerator refrigeration system and a light intensity storage module. The light-sensing element is configured to convert a detected light signal into an electrical signal and transmit the electrical signal to the controller. The controller may then determine a target temperature according to the intensity of the converted electrical signal. Through the refrigerator light-sensing system, the power consumption of the refrigerator can be reduced, and the noise can be reduced, providing a better user experience.

A transportation refrigeration system and a CAN ID allocation method for a transportation refrigeration system. The transportation refrigeration system includes: a refrigeration circuit including a compressor, a condenser, and a plurality of evaporators connected in parallel, all of which are connected to form a loop; a plurality of chambers, each of the evaporators being located in one of the chambers to adjust the chamber; a plurality of sensors of the same type, each of the sensors being installed in one of the chambers respectively; and a control unit, after being installed in place and energized, the plurality of sensors send their own identification codes to the control unit, and the control unit allocates a CAN ID to each of the sensors after receiving the identification codes of the sensors, so that the identification code of each sensor is bound to the corresponding CAN ID respectively.

An insulated structure comprises a first panel and a second panel coupled to the first panel. The first and second panels define an insulating cavity therebetween. A port is defined by the second panel. The port is an opening into the insulating cavity. A connector is coupled to the second panel. A tube is coupled to the connector and extends parallel along the second panel.

A hatch device comprised by a main support body, a flow guide piece and an optional plug, which allows for minimum modifications in the service hatch cover's structure during installation.

An insulated structure comprises a first panel and a second panel coupled to the first panel. The first and second panels define an insulating cavity therebetween. A port is defined by the second panel. The port is an opening into the insulating cavity. A connector is coupled to the second panel. A tube is coupled to the connector and extends parallel along the second panel.

An appliance includes a metallic liner and an outer metallic wrapper. An insulating cavity is defined between the metallic liner and outer metallic wrapper. The appliance further includes a pressure sensing device disposed within the cavity. The pressure sensing device is located to detect a pressure status and transmit the pressure status through at least one of the metallic liner and outer metallic wrapper.

A refrigeration appliance includes a freezer compartment fluidly coupled to an ice maker compartment via an ice maker return duct. An internal sensor is positioned within the freezer compartment and configured to sense a first condition within the freezer compartment. An external sensor is coupled to said refrigeration appliance and configured to sense a second condition external to said refrigeration appliance. A return fan is positioned within the ice maker return duct. A controller is operably coupled to the internal and external sensors to receive sensed first and second conditions. The controller is configured to determine a differential between the sensed first condition within the freezer compartment and the sensed second condition external to said refrigeration appliance. The controller activates the return fan to blow air from the ice maker compartment into the freezer compartment in response to the differential.