Wireless Temperature Container With Inductive Power Isolation
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Solution Overview
Problem
Existing wireless temperature maintenance containers for food expose electric elements to moisture and gases, leading to oxidation and reduced service life due to reliance on wired power transmission for heating or cooling circuits.
Innovation Solution
A wireless temperature maintenance container design that incorporates a transmitter circuit and a receiver circuit with a predetermined distance between them, using wireless power transmission based on electromagnetic induction to power a temperature controller, such as a heater or cooler, within an accommodating space at the bottom of the container, protected by housing to prevent exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired power transmission is used to power the heating or cooling circuit, then the temperature maintenance function can be achieved, but the electric elements are exposed to moisture and gases causing oxidation and reduced service life
Solution Approach 1:
The patent replaces the wired mechanical power transmission system with a wireless electromagnetic power transmission system. The transmitter circuit and receiver circuit use electromagnetic fields to transmit power without physical electrical connections, eliminating the exposure of electric elements to moisture and gases through sealed housing structures.
Solution Approach 2:
The patent introduces electromagnetic fields as an intermediary medium to transmit power from the transmitter circuit to the receiver circuit. This intermediary allows power transmission without direct electrical contact, protecting the electric elements from harmful environmental factors while maintaining functionality.
2Reliability
If wireless power transmission is implemented, then electric elements are protected from moisture and gases, but the device structure becomes more complex with additional transmitter and receiver circuits
Solution Approach 1:
The patent merges the power transmission and temperature control functions into an integrated wireless system. The transmitter circuit, receiver circuit, and temperature control circuit work together as a unified system, where the wireless power transmission components are seamlessly integrated with the existing temperature control functionality, reducing overall system complexity despite adding wireless capabilities.
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 effectively maintains the temperature of contents within the container while protecting the electric elements from moisture and gases, enhancing their service life and safety by eliminating direct electrical contact and using standardized wireless power transmission protocols like WPC, PMA, or A4WP.
Implementation Method 1
The transmitter coil receives a first direct current and generates a magnetic field based on the electromagnetic induction
Implementation Method 2
The magnetic field passes the receiver coil and an alternating current is generated based on the electromagnetic induction
Data Source
Figure 1
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AI summary
A wireless temperature maintenance container has an accommodating space accommodating a transmitter circuit (10) and a receiver circuit (12). The transmitter circuit (10) comprises a first power processing circuit (20) and a transmitter coil (22). The first power processing circuit (20) receives a utility power and outputs a first direct current. The transmitter coil (22) receives the first direct current and generates a magnetic field. The receiver circuit (12) comprises a receiver coil (24), a second power processing circuit (26) and a temperature controller (28). The magnetic field passes the receiver coil (24) and an alternating current is generated. The second power processing circuit (26) receives the alternating current and outputs a second direct current. The temperature controller (28) receives the second direct current to control the temperature of the container. The transmitter circuit (10) is on the first circuit board, and the receiver circuit (12) is on the second circuit board. Distance between the first circuit board and the second board is 2mm-4mm.