Performance control system of oxygen-deficit protection device suitable for various flue gas types and gas pressures

Abstract

The invention relates to a performance control system of an oxygen-deficit protection device suitable for various flue gas types and gas pressures. The performance control system comprises an installation rack, an injecting pipe, a thermocouple and an ignition needle, wherein an internal thread and a thread step are arranged in the injecting pipe, and the internal thread is connected with a lower nozzle; the upper step position of the thread is provided with a first mixing channel, and two symmetrical air holes are formed in the step; the hole diameter of each air hole is 2.6+ / -0.2mm, and a second mixing channel of which the inner diameter is smaller than that of the first mixing channel is arranged; a flue gas nozzle is provided with two steps, and the heights of the steps are larger than the inner diameter of the air holes in the injecting pipe; the distance between the top plane of a nozzle gas hole and the bottom of the first mixing channel of the injecting pipe is 1.5-2mm, and the step gap 2 of the top edge of the nozzle is larger than 1mm; the end part of the ignition needle is positioned at the outer side of the inner wall of the top of the injecting pipe. The performance control system of the oxygen-deficit protection device can be simultaneously applied to various flue gas kinds and different flue gas pressures and can also ensure that the cutoff point is qualified.

Description

Technical field [0001] The invention relates to a safety protection system for gas appliances, in particular to a performance control system for an oxygen-deficient protection device suitable for multiple gas types and air pressures. The invention is mainly applied to the safety protection device of gas appliances using gas such as liquefied gas (LPG), natural gas (NG), butane (Butane), etc., so that the gas appliance is extinguished and the gas source is automatically shut off after lack of oxygen to realize safety Protection effect. Background technique [0002] Hypoxia protection device, also called ODS (such as Figure 1-1 to Figure 1-4 Shown are two commonly used ODS in the prior art), which are widely used in indoor gas appliances. Its specific function is that when the gas appliances are used in a closed room, as the gas continues to burn, the indoor O2 is continuously consumed and produced CO2, CO and other gases that are harmful to human health and even affect life safet...

AI Technical Summary

Problems solved by technology

[0016] Most of the current hypoxia protection devices can meet the performance requirements of LPG gas, such as successful ignition and qualified flameout point, etc. The problem that the adjustable range of the flameout point of the structural design of the oxygen protection device is too small is exposed. For example, for butane, either the flameout point is qualified, but it is difficult to ignite or even cannot be ignited, or the ignition is good but the flameout point is unqualified, or Phenomena such as yellow flames appear, such as when the gas is extinguished and the CO2 air percentage is much higher than 1.5% or even more than 2.5%

In the application of NG, the current hypoxia protection device actually cannot meet the CO2 flameout point range of 0.8% to 1.5%, usually at 3% to 5%, so it can only be used as an eternal flame (for Pseudo-hypoxic protection device that provides fire source for gas appliances but does not provide flameout protection function)

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