Kitchen Appliance Lid RFID Detection for Locking State Verification
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Solution Overview
Problem
Existing kitchen appliance lid detection mechanisms are costly, complex, and require significant installation space, with mechanical systems prone to contamination and electrical systems vulnerable to environmental conditions, making them unreliable for detecting the locking state of container arrangements.
Innovation Solution
A container arrangement with a reading antenna and transponder system where the antenna is only activated when the lid is in the locked position, allowing for a robust, simple, and space-efficient detection of the locking state using RFID technology, ensuring that appliance functions can only be released when the lid is properly locked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical detection mechanisms (microswitches, plungers, levers) are used to detect lid locking state, then the locking position can be detected, but the device complexity increases and the risk of contamination rises
Solution Approach 1:
The patent replaces mechanical detection mechanisms (microswitches, plungers, levers) with an RFID-based electromagnetic detection system. The reading antenna emits electromagnetic fields to detect the transponder in the lid, eliminating mechanical moving parts that are prone to contamination and failure. This substitution directly resolves the contradiction by maintaining detection reliability while reducing device complexity and contamination risk.
Solution Approach 2:
The patent introduces an RFID transponder as an intermediary element in the lid that stores locking state information. Instead of direct mechanical contact between detection components, the system uses electromagnetic fields to read the transponder state, providing a non-contact intermediary that eliminates mechanical complexity and contamination issues.
2Reliability
If electrical switches with mechanical transmission elements are used to transmit locking information, then the locking state can be detected, but the risk of contamination and jamming increases
Solution Approach 1:
The patent replaces electrical switches with mechanical transmission elements with an RFID electromagnetic communication system. The reading antenna transmits electromagnetic fields through the pot wall to read the transponder in the lid without any physical contact or transmission path through the appliance base. This eliminates contamination and jamming risks associated with mechanical plungers and levers that traverse the appliance interior.
Solution Approach 2:
The electromagnetic field serves as an intermediary that can penetrate the pot wall material to transmit locking information from the lid to the reading controller in the appliance base without requiring a physical transmission path through the appliance interior, thereby avoiding contamination and jamming.
3Reliability
If RFID reading antenna is continuously activated for lid detection, then the locking state can be detected, but energy consumption increases
Solution Approach 1:
The patent implements periodic activation of the reading antenna only when the lid is in the locking position, rather than continuous activation. The system checks the locking state at relevant moments (e.g., when appliance functions are requested), reducing energy consumption while maintaining reliable detection capability when needed.
Solution Approach 2:
The system performs preliminary detection of the locking state before activating appliance functions. The reading antenna is activated only when there is a need to verify the lid position, performing the detection action in advance of function execution rather than continuously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides a reliable and efficient method for detecting the locking state of kitchen appliance lids, enhancing safety and reducing implementation complexity and space requirements, while preventing unauthorized operation.
Implementation Method 1
The lid (104) comprises at least one reading antenna (106) and at least one transponder (124), wherein the transponder (124) is arranged within a range of the reading antenna (106)
Data Source
AI summary
The application relates to container arrangement for a kitchen appliance including a food receiving element, and at least one lid configured to close an opening of the food receiving element, wherein the lid is movable relative to the food receiving element between a first operating position and a second operating position different from the first operating position, wherein the lid includes at least one reading antenna connected to a first lid contact and a second lid contact, wherein the lid includes at least one transponder positioned within range of the reading antenna, wherein the food receiving element includes at least a first pot connection extending between a first upper pot contact and a first lower pot contact and a second pot connection extending between a second upper pot contact and a second lower pot contact, wherein the first lower pot contact and the second lower pot contact are configured to electrically connect to a reading controller, wherein the first lid contact and the second lid contact are arranged such that an electrical connection is established between the first lid contact and the first upper pot contact and an electrical connection is established between the second lid contact and the second upper pot contact only in the second operating position.