Door status monitoring circuit and refrigerator
By using a combination of magnetic switches and delay circuits, the problem of poor refrigerator door status monitoring has been solved, achieving accurate alarms and reduced energy consumption, while improving the lifespan of the door switch and the user experience.
CN224666445UActive Publication Date: 2026-08-21TCL HOME APPLIANCES (HEFEI) CO LTD
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Patent Information
- Application Number
- CN202521370869.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-06-30
AI Technical Summary
Technical Problem
Existing refrigerator door status monitoring solutions are ineffective, leading to increased energy consumption or food spoilage. They mainly rely on mechanical microswitches, infrared sensors, and gravity sensing modules.
Method used
Using a magnetic switch (such as a reed switch) as the door switch, combined with a delay circuit and a control circuit, an alarm is triggered and the lights are turned off after a delay is set, reducing the risk of false alarms and achieving accurate monitoring.
Benefits of technology
Eliminate mechanical wear, extend door opening and closing life, reduce energy consumption, reduce false alarms, achieve excellent monitoring of door status, and improve user experience.
✦ Generated by Eureka AI based on patent content.
Abstract
The embodiment of the application provides a door state monitoring circuit and a refrigerator. The door state monitoring circuit comprises: a detection circuit connected with a door switch, the detection circuit being used for detecting an opening state of the door switch and outputting an opening signal; a delay circuit, an input end of the delay circuit being connected with an output end of the detection circuit, the delay circuit being used for outputting the opening signal after a delay setting time length; a lighting lamp and an alarm; a control circuit, an input end of the control circuit being connected with an output end of the delay circuit, output ends of the control circuit being connected with the lighting lamp and the alarm respectively, the control circuit being used for cutting off the lighting lamp when the opening signal after the delay setting time length is received, and controlling the alarm to alarm. The alarm is performed only after the door is opened for the setting time length, the risk of false alarm caused by normal use of the refrigerator by a user can be reduced, and precise alarm on an adverse problem caused by long-time opening of the door switch can be realized.
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