Method for starting up a heating device, computer program, regulating and control device and heating device

Briefly opening the gas valve before activating the delivery system in a hydrogen-powered heating device addresses ignition challenges, enhancing reliability and reducing delays in fuel gas flow stabilization for safe and efficient start-up.

EP4357671B1Active Publication Date: 2026-01-28VAILLANT GMBH(DE)
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Patent Information

Application Number
EP2023202368
Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2022-10-17
Filing Date
2023-10-09
Publication Date
2026-01-28
Estimated Expiration
2043-10-09

AI Technical Summary

Technical Problem

Existing methods for starting a heating device, particularly those using hydrogen as fuel, face challenges such as hard ignition, deflagration, flame flashback, and time delays in fuel gas flow stabilization, leading to unreliable start-up processes and user discomfort.

Method used

A method involving brief opening of the gas valve before activating the delivery system to fill the gas valve with fuel gas, followed by a purge and ignition attempt, ensuring safe and rapid initial ignition, especially for hydrogen-powered appliances.

Benefits of technology

This approach significantly reduces time delays and enhances the reliability of the ignition process, minimizing the risk of misfires and user discomfort by ensuring quick and stable fuel gas flow initiation.

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Abstract

A method for starting a heating appliance (1) is proposed, comprising a conveying device (2) for conveying a combustion mixture of fuel gas and combustion air to a burner (3), an ignition device (12) for the combustion mixture, and a gas valve (5), wherein, prior to the commissioning of the conveying device (2), the gas valve (5) is briefly opened (32), thereby filling the gas valve (5) with fuel gas. The duration of the brief opening (32) of the gas valve (5) can be a maximum of half the regular safety period (35) for commissioning the heating appliance (1). This reduces the influence of time delays, caused by a longer period since the last interruption of burner operation, between the opening of the gas valve (5) and the commencement and stabilization of the fuel gas flow.
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