Pressure Cooker Steam-Release Button With Locking Groove
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Solution Overview
Problem
Current electric pressure cookers require manual operation of a release valve to discharge steam, which can lead to scald injuries due to hot steam exposure, as the valve needs to be continuously pressed and held open.
Innovation Solution
A steam-discharging device with a button assembly featuring a guiding rod and heart-shaped groove mechanism that allows the steam-discharging button to be locked in a position for continuous steam release without needing to be held down, and a spring mechanism to reset the pressure-limiting valve when the button is pressed again.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manually operated release valve is used to discharge steam, then the pressure can be reduced to an acceptable level, but a significant amount of hot steam may cause scald injuries to users
Solution Approach 1:
A guide rod is introduced as an intermediary component between the button and the valve mechanism. The guide rod transmits the button's downward movement to open the valve, then automatically returns to its initial position to close the valve after a predetermined time delay, preventing direct user exposure to hot steam while maintaining pressure reduction functionality
Solution Approach 2:
The guide rod is designed with a predetermined return time that is longer than the steam discharge duration. This preliminary timing mechanism ensures the valve closes automatically before the user can be exposed to harmful steam, proactively preventing scald injuries before they can occur
2Productivity
If the release valve requires continuous pushing and holding to discharge steam, then steam can be discharged, but user effort and operation complexity increase
Solution Approach 1:
The guide rod is designed with a predetermined return time that automatically closes the valve after steam discharge is complete, eliminating the need for users to continuously hold the button. This preliminary timing mechanism automates the valve closing action, reducing user effort while maintaining efficient steam discharge
Solution Approach 2:
The guide rod automatically returns to its initial position and closes the valve without requiring continuous user intervention. The mechanism serves itself by using the button's initial press to trigger the entire discharge sequence, then automatically resetting, thereby reducing operational complexity and user effort
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
Simplifies the steam-discharging process by allowing one-time activation for continuous steam release and automatic return to a closed state, reducing the risk of scald injuries and user effort.
Implementation Method 1
the spring will upwardly bias the steam-discharging button towards an initial position thereof
Data Source
AI summary
A cooking appliance is provided. The lid comprises a pressure-limiting valve, a lever, and a button assembly comprising a steam-discharging button and a button seat, the steam-discharging button being fastened to the button seat and being vertically movable for actuating the lever to activate the pressure-limiting valve for steam discharging. The button assembly comprises a guiding rod, the steam-discharging button comprises a heart-shaped groove. A downward movement of the steam-discharging button causes a first end of the guiding rod to slide within the heart-shaped groove. When the steam-discharging button is released, the first end of the guiding rod slides to a position for lockingly engaging with the heart-shaped groove, to keep the steam-discharging button at a steam-discharging position. Pressing the steam-discharging button once will lock the steam-discharging button for continuous steam discharging without the need to keep holding the button, thereby simplifying the discharging operation over prior art.