Gas Hob Burner Nozzle Sizing for Temporary Excess Power
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Solution Overview
Problem
Gas hobs lack the ability to generate excess power for short periods, which is desirable in premium cooking applications, due to design limitations that restrict the power output of their gas burners.
Innovation Solution
The method involves gas burners with nozzles having an opening cross-section larger than required for rated power, allowing for increased power output during excess power operation by utilizing the gas valve to adjust throughput, ensuring combustion quality and hygiene conditions are maintained, and limiting excess power operation to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the nozzle opening cross-section is increased to enable excess power operation, then the maximum power output of the gas burner is improved, but the combustion quality and hygiene conditions may deteriorate
Solution Approach 1:
The patent applies parameter changes by increasing the nozzle opening cross-section beyond the rated power requirement. Specifically, the nozzle is designed with an opening cross-section that is 5% to 50% larger than what would be required for rated power operation alone, enabling the gas burner to deliver excess power (boost power) while maintaining acceptable combustion quality through controlled parameter adjustment.
2Quantity of substance
If the gas valve opening cross-section is increased to provide excess power, then the throughput capability is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the gas valve with an opening cross-section that serves multiple functions: it controls gas flow for both rated power operation and excess power operation. The gas valve's opening cross-section is made considerably larger than the nozzle's opening cross-section, allowing a single valve design to handle varying throughput requirements without requiring additional control components.
3Power
If the nozzle opening cross-section is increased for excess power operation, then the maximum throughput is improved, but the rated power operation efficiency may worsen
Solution Approach 1:
The patent applies dynamics by using the gas valve to dynamically adjust the gas flow rate to the nozzle based on operational requirements. During rated power operation, the gas valve is adjusted to provide only the necessary throughput, leaving the nozzle's larger opening cross-section as a reserve capacity. This dynamic control allows the system to maintain efficiency at rated power while having the capability to deliver excess power when needed.
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 enables gas hobs to provide a temporary increase in power output by up to 50% while maintaining combustion quality and adhering to hygiene standards, allowing for efficient and clean cooking without exceeding safe energy limits.
Implementation Method 1
A dedicated gas valve for adjusting a gas supply to the gas burner is associated with each gas burner... an opening cross-section, that is to say the maximum throughput, of the gas valve is advantageously considerably larger than the opening cross-section or maximum throughput of a nozzle
Implementation Method 2
that nozzle which has the largest burner ring or burner ring diameter with which the so-called main position is taken up is considered... the opening cross-section of the nozzle has a limiting effect in respect of maximum gas outlet or gas throughput
Implementation Method 3
Gas burners having a plurality of burner rings or nozzles... each have at least one nozzle... for combustion purposes
Data Source
AI summary
For operating a gas hob having at least two gas burners which can be operated separately and which each have a nozzle, a dedicated gas valve for adjusting a gas supply to the gas burner is associated with each gas burner. The nozzle of a gas burner has an opening cross-section which is 10% to 30% larger than the opening cross-section which is required for the rated power of the gas burner. During normal operation of the gas burner, the associated gas valve is adjusted to a rated throughput. During operation of the gas burner under excess power with full utilization of the full opening cross-section of the nozzle, the gas valve is opened further and adjusted to an excess power throughput.