Float valve motion detection device, pot cover assembly and pressure cooking appliance
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Solution Overview
Problem
The existing float valve motion detection systems in pressure cooking appliances are costly due to the need for magnetically conductive materials and complex processing procedures, which increases production costs and reduces efficiency.
Innovation Solution
A float valve motion detection device using a valve core made of materials with permeability unequal to that of air, which eliminates the need for magnetically conductive materials and simplifies the production process by changing the structure of the valve core and using a hollow inductance coil to detect changes in pressure, thereby reducing production costs and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetically conductive materials are fixed on the valve core and processed with grooves, then the float valve motion detection function is achieved, but the production cost increases and production efficiency decreases
Solution Approach 1:
The patent extracts the magnetically conductive materials and groove processing from the valve core design, eliminating these complex manufacturing steps while maintaining the motion detection function through alternative means
Solution Approach 2:
The patent changes the material parameter of the valve core from requiring magnetically conductive materials with grooves to using ordinary materials without grooves, fundamentally altering the manufacturing approach
2Measurement precision
If magnetically conductive materials are processed and pressed into the valve core groove, then the motion detection accuracy is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent removes the magnetically conductive materials and groove structures from the valve core, eliminating the complex assembly process while preserving detection functionality through the hollow inductance coil mechanism
Solution Approach 2:
The patent merges the valve core with the hollow inductance coil structure, where the valve core itself becomes part of the detection mechanism rather than requiring separate magnetically conductive components
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 reduces production costs and improves production efficiency by eliminating the need for magnetically conductive materials and complex processing procedures, while ensuring safe operation by accurately detecting pressure changes within the pot.
Implementation Method 1
the detection circuit converts the change of the inductance into an electric signal
Implementation Method 2
a valve core made of materials having permeability unequal to that of air
Data Source
AI summary
The present disclosure provides a float valve motion detection device, a pot cover assembly and a pressure cooking appliance, the float valve motion detection device comprising: a float valve, a hollow inductance coil and a detection circuit. A valve core of the float valve is made of materials having permeability unequal to that of air. When the valve core is pushed by the pressure in a pot from a first position to a second position, the volume of the valve core in the hollow inductance coil changes, which changes the inductance of the hollow inductance coil. A detection circuit determines the position of the valve core by means of detecting the change in the inductance of the hollow inductance coil so as to determine whether it is safe to uncover at the current time.