Gas valve and gas stove
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Solution Overview
Problem
Existing gas valves for stoves lack a cost-effective and user-friendly solution for regulating gas flow rates, as they often require complex designs and materials that increase production costs and do not provide a progressive and linear adjustment of gas flow.
Innovation Solution
A gas valve with a cylindrical gas regulating unit having multiple gas outlet openings of varying cross-sectional areas, allowing for stepwise adjustment of gas flow rates by rotating the unit into different flame positions, simplifying production and improving ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cone-shaped plug is used in the gas valve, then the gas flow can be regulated, but the production complexity and costs increase
Solution Approach 1:
The gas valve is divided into a valve body and a separate gas regulating unit that can be rotated independently. This segmentation allows the gas regulating unit to be manufactured as a simple cylindrical component with multiple gas outlet openings, eliminating the need for complex cone-shaped plugs while maintaining flow regulation functionality through rotational positioning of different opening sizes.
Solution Approach 2:
Instead of using a conventional cone-shaped plug that moves linearly to regulate flow, the invention inverts the approach by using a cylindrical body with multiple gas outlet openings of different cross-sectional areas that are positioned around the circumference. Rotation of this cylindrical unit brings different openings into alignment with the gas inlet, achieving flow regulation through a simpler geometric form.
2Manufacturing precision
If a cylindrical gas regulating unit with multiple gas outlet openings is used, then production costs are reduced, but the gas flow regulation precision may be affected
Solution Approach 1:
Different gas outlet openings are designed with different local qualities - specifically, different cross-sectional areas tailored to specific flame positions. Each opening is precisely calibrated to provide the exact gas flow rate needed for its designated flame position (e.g., minimum flame, medium flame, maximum flame), ensuring manufacturing precision is maintained despite the simplified cylindrical geometry.
Solution Approach 2:
The invention changes the parameter of gas outlet opening cross-sectional area to achieve different flow rates. By varying this parameter across multiple openings and selecting which opening is active through rotation, the system achieves precise gas flow regulation. The cross-sectional areas are specifically designed to provide progressive and linear flow control for different cooking requirements.
3Ease of operation
If the gas regulating unit is rotatable into multiple flame positions, then user control is improved, but the device complexity increases
Solution Approach 1:
The cylindrical gas regulating unit serves multiple functions simultaneously: it acts as a flow regulator, a position indicator, and a selection mechanism. By rotating the unit to different angular positions, a single component controls multiple gas flow rates corresponding to different flame positions (minimum, medium, maximum). This multi-functionality eliminates the need for separate control mechanisms for each flame level, reducing overall device complexity while improving ease of operation.
Data Source
AI summary
A gas valve for a gas stove, comprising a valve housing, wherein the valve housing has a gas inlet and a gas outlet, and a gas regulating unit, wherein the gas regulating unit has a cylindrical outer surface, wherein the gas regulating unit is rotatable supported in the valve housing by means of the outer surface, wherein the gas regulating unit has a plurality of gas outlet openings, wherein the gas regulating unit is rotatable into a plurality of flame positions, wherein each gas outlet opening is assigned to one determined flame position, wherein in each flame position the gas inlet is connected to the gas outlet by means of the gas outlet opening which is assigned to the one determined flame position, and wherein the gas outlet openings have cross-sectional areas which differ from each other in order to achieve different flow rates of gas through the gas valve in the individual flame positions.