Heating Appliance Startup Control for Faster Safe Ignition
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Solution Overview
Problem
Existing heating appliances experience delays in meeting heat demands, particularly during hot water requirements, leading to reduced user comfort and inefficiencies due to high power operation and safety periods, which existing commissioning methods fail to address effectively.
Innovation Solution
A method for commissioning a heating device that adjusts the safety period and starting power based on detected heat demand, allowing for safe and efficient ignition by determining a tailored safety period and starting power through a characteristic curve or map, ensuring rapid modulation to meet demand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed safety period is used for all heating demands, then safety is ensured, but user comfort deteriorates due to unnecessary delays in meeting hot water demands
Solution Approach 1:
The patent applies dynamics by making the safety period duration variable rather than fixed. The control device adapts the safety period length based on the detected heat demand type: a shorter safety period for hot water demands and a longer safety period for heating demands. This dynamic adjustment resolves the contradiction by maintaining safety while reducing unnecessary waiting time for hot water applications.
Solution Approach 2:
The patent changes the parameter of safety period duration based on the heat demand characteristics. By detecting whether the demand is for hot water or heating, the system adjusts the safety period parameter accordingly, allowing faster response for hot water while ensuring adequate safety for heating operations.
2Reliability
If a fixed starting power is used for all heating demands, then safe ignition is ensured, but user comfort deteriorates due to delays in meeting high heat demands
Solution Approach 1:
The patent applies dynamics by making the starting power variable rather than fixed. The control device adapts the starting power level based on the detected heat demand type: a higher starting power for hot water demands to meet immediate high heat requirements, and a lower starting power for heating demands. This dynamic adjustment resolves the contradiction by ensuring safe ignition while improving response speed for different applications.
Solution Approach 2:
The patent changes the parameter of starting power based on the heat demand characteristics. By detecting whether the demand is for hot water or heating, the system adjusts the starting power parameter accordingly, allowing faster response and higher productivity for hot water applications while maintaining safe ignition conditions.
3Productivity
If high power operation is used to meet hot water demands quickly, then productivity improves, but harmful factors increase due to noise emissions
Solution Approach 1:
The patent applies local quality by applying different power levels to different operational contexts. Instead of uniformly high power operation, the system uses high starting power specifically for hot water demands where quick response is critical, while using lower power for heating demands where noise is more of a concern. This localized approach to power application resolves the contradiction by targeting high power only where productivity benefits outweigh noise drawbacks.
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 method enables rapid and safe ignition, reducing waiting times and noise emissions, while maintaining safety, and allows existing appliances to be easily adapted without additional components.
Implementation Method 1
A mass flow of fuel corresponding to a predetermined air-fuel ratio is added to this air. The resulting combustion mixture exits a burner (3) located in a combustion chamber (8) of the heating appliance and is ignited by an ignition device (15)
Data Source
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AI summary
The invention relates to a method for commissioning a heating appliance (1). During commissioning, a conveying device (2) of the heating appliance (1) is brought up to a starting power and a mass flow of combustion air corresponding to the starting power is drawn in, to which a mass flow of fuel corresponding to a predetermined air ratio is added via a gas valve (5), and the resulting combustion mixture exits from a burner (3) into a combustion chamber (8) of the heating appliance (1) and is ignited there by an ignition device (15), whereby after the expiry of a safety period beginning with the opening of the gas valve (5), a flame must be detected by a flame monitoring device (12) of the heating appliance (1) so that the heating appliance (1) ends the commissioning and enters free modulation.The procedure includes at least the following steps: a) detecting a heat demand, b) determining at least a safety period duration and a starting power (27, 28) depending on the heat demand detected in step a), c) starting up the heating device (1) with the safety period duration and starting power (27, 28) determined in step b).