Pressure detection device with improved control precision of pressure cooking appliance
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Solution Overview
Problem
Existing pressure detection devices in pressure cookers face challenges with complex wire connections that hinder the detachability of the cooker lid, leading to assembly difficulties and increased costs due to the use of wireless power supply and data transmission technologies.
Innovation Solution
A pressure detection device with a simple and compact structure featuring a pressure sensing assembly and a detection unit that uses wireless coupling coils and a movable magnetic core to detect pressure changes, allowing for easy assembly and disassembly, and eliminating the need for complex wire connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wireless power supply and data transmission technologies are used to enable detachable lid, then ease of assembly is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex wireless power supply and data transmission systems with a simple magnetic coupling mechanism. The magnetic core and coil assembly creates electromagnetic coupling between the lid and base, enabling both power transmission and data communication through magnetic field interaction rather than complex wireless electronics.
Solution Approach 2:
The magnetic coupling assembly serves multiple functions simultaneously: it provides mechanical attachment between lid and base, transmits electrical power through electromagnetic induction, and enables data communication through magnetic field modulation. This multi-functionality eliminates the need for separate wireless power and data transmission systems.
2Ease of manufacture
If wireless power supply and data transmission technologies are used to enable detachable lid, then ease of assembly is improved, but production cost increases
Solution Approach 1:
The patent replaces expensive wireless power supply modules, wireless data transmission chips, and associated electronics with a relatively simple magnetic core and coil assembly. This substitution dramatically reduces component costs while achieving the same functional goals of detachable lid operation.
Solution Approach 2:
The magnetic coupling assembly uses inexpensive materials such as ferrite magnetic cores and standard electromagnetic coils that are significantly cheaper than wireless power and communication modules. The simplicity of the design allows for cost-effective mass production.
3Measurement precision
If pressure sensing assembly with movable part is used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex electronic pressure sensors with a magnetic pressure sensing mechanism. A movable magnetic core responds to pressure changes by altering the magnetic coupling between coils, converting pressure measurements into electromagnetic signal variations that are detected and processed electronically.
Solution Approach 2:
The magnetic core acts as an intermediary between the pressure input and the electrical output. Pressure changes physically move the magnetic core, which then modulates the magnetic field and induces voltage changes in the coil, providing a clean mechanical-to-electrical transduction path.
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
The solution enables accurate pressure detection in pressure cookers, ensuring safe and reliable operation, improved user experience, and reduced production costs by simplifying the assembly process and eliminating the need for wireless power and data transmission units.
Implementation Method 1
the movable magnetic core is configured to move relative to the first coil when the pressure change is sensed, so as to cause an inductance value of the first coil to change
Implementation Method 2
a second coupling coil disposed in the housing and wirelessly coupled with the first coupling coil
Data Source
AI summary
Disclosed is a pressure detection device configured to detect pressure intensity in a sealed cavity of a cooking appliance, comprising: a pressure sensing assembly comprising a fixed part and a movable part, in which the movable part moves relative to the fixed part when a pressure change in the sealed cavity is sensed, so as to cause a sensing parameter of the pressure sensing assembly to change; and a detecting unit connecting with the pressure sensing assembly and can acquire the pressure intensity in the sealed cavity according to a current sensing parameter of the pressure sensing assembly. The pressure sensing assembly further comprises a flexible sealing sheet disposed at an open end of the body portion to seal the open end, and configured to be deformed towards the pressure chamber when an air pressure in the sealed cavity is greater than an air pressure in the pressure chamber.