Safety cap assembly and a pressure cooker provided therewith
Solution Overview
Problem
Existing pressure cookers face risks of explosion due to clogged safety valves, often caused by forgotten or improperly attached safety caps, which can lead to accidents during use.
Innovation Solution
A safety cap assembly with a pressure release tube, cap securing nut, and mesh casing, designed for easy attachment and removal, featuring a sliding lock key mechanism that ensures secure mounting and prevents accidental disengagement, allowing for vacuum cooking without the need for pouches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a safety cap is provided to prevent clogging of the safety valve, then the reliability of the pressure cooker is improved, but the device complexity increases due to additional components
Solution Approach 1:
The safety cap unit is merged with the pressure release tube through the supporting bridge structure, where the bridge extends from the tube and integrates the mesh casing attachment. This combination reduces the number of separate components while maintaining the safety function of preventing food particle clogging in the safety valve.
Solution Approach 2:
The safety cap assembly is segmented into distinct functional parts: the pressure release tube with channel, the supporting bridge structure, and the mesh casing. This segmentation allows each component to be optimized for its specific function while maintaining overall simplicity of the assembly.
2Reliability
If the safety cap assembly is made secure to prevent accidental removal, then the reliability is improved, but the ease of operation deteriorates as users cannot easily remove it for cleaning
Solution Approach 1:
The attachment mechanism uses a dynamic locking system with the sliding lock key that can transition between locked and unlocked states. The key slides along the pressure release tube, engaging or disengaging the locking position, allowing the safety cap to be securely fixed during use but easily removed when needed for cleaning.
3Reliability
If a sliding lock key mechanism is added to ensure secure mounting, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The sliding lock key mechanism is designed to be operated by the user themselves without requiring additional tools or complex assembly procedures. The key directly engages with the pressure release tube structure, providing self-contained locking functionality that enhances reliability without introducing excessive complexity.
Data Source
Figure 1A~1B
Figure 2~4
Figure 5~6
AI summary
A safety cap assembly to be installed in the lid of a cooking appliance such as a pressure cooker and comprising a pressure release tube having a flange portion at its lower end, a cap securing nut with its outer diameter gradually increasing from the top end to the lower end and provided on the flange portion of the cap securing nut, and a safety cap unit which includes a mesh casing and a supporting bridge in a shallow reversed V-shape and is mounted to the lower portion of the pressure release tube. The safety cap assembly can be installed along with a vacuum adapter including a clogging ball inside to create a vacuum environment inside the pressure cooker.