Low-interference ignition device for safety protection of gas appliance

Abstract

The invention relates to a low-interference ignition device for safety protection of a gas appliance. The low-interference ignition device comprises a wire electrode, a fire outlet and an induction coupler, wherein the longitudinal distance from the end part of the wire electrode to the top of the fire outlet is 2-6 mm; the transverse distance from the end part of the wire electrode to the inner wall of the fire outlet is 0-3 mm; the center surface in the forward-to-backward direction of the end part of the wire electrode and the center surface in the forward-to-backward direction of the fire outlet are in a same plane, or a deflection distance of 0-2 mm is formed between the forward-to-backward directions of the end part of the wire electrode and the fire outlet; the end face of the fire outlet has an annular structure. The low-interference ignition device has the characteristics that the wire electrode is shortened, so that the gas interference degree is reduced; furthermore, by selecting the proper position of the end part of the wire electrode and designing the corresponding structure of the upper end face of the fire outlet, the left end of the wire electrode can get away from a gas (or flame) region to the maximum extent while an electric spark trace can still pass through the gas (or flame) region; therefore, on the premise of guaranteeing the ignition success rate, the unstable interference of the wire electrode to the oxygen-poor protection performance of an ozone depleting substance (ODS) can be greatly alleviated.

Description

technical field [0001] The invention relates to a low-interference ignition device for safety protection of gas appliances. Background technique [0002] There are two main ways to ignite gas appliances. One is that the electric spark directly ignites the main burner after the igniter is ignited, but this kind of gas appliance does not have the most basic safety functions such as flameout protection. An auxiliary burner is also configured, and the igniter first ignites the auxiliary burner to make it a small fire source that can control the state of burning or extinguishing, and ignites the main burner. [0003] The hypoxia protection device is a common auxiliary burner. In addition to the function of igniting and maintaining the ignition state, it also has the function of hypoxia protection, also known as ODS (see Figure 1-Figure 4 ), its specific function is that when the gas appliance is used in a closed room, as the gas continues to burn, the indoor O2 is continuously c...

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Problems solved by technology

[0013] 4. From the actual measurement results, it often happens that the ODS should be extinguished but the flame hangs on the left end of the electrode wire, and the time from the initial hanging to the final complete detachment and the fire extinguishing to achieve hypoxia protection fluctuates greatly, ranging from 0-2 hours , seriously or even fatally affect the effective hypoxic protection function of ODS

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