A control device for a gas infrared burner

Abstract

A control device for an infrared gas combustor comprises a gas passage formed by a gas control valve (1), a nozzle (3), an injection pipe (6) and a stove chamber (7), and gas passes through the gas control valve (1), the nozzle (3), the injection pipe (6) and the stove chamber (7) sequentially. The gas axially flows in the gas passage to form an axial gas flow which flows to a porous combustion radiant panel (9) and is ignited for combustion by an ignition pin (8) after overflowing. The control device is characterized in that a radial auxiliary nozzle is arranged on the gas passage and used for ejecting a radial gas flow into the gas passage at the beginning of ignition, and ejection is stopped as soon as ignition is completed. The control device has the advantages of fine control performance, ignition performance and combustion performance, high reliability, easiness in installation and wide gas adaptive range. According to repeated experimental verification, ignition is completed instantly, black smoke generated in ignition is avoided, no evident incomplete combustion exists, and ignition efficiency is high.

Description

technical field [0001] The invention relates to a control device for a gas infrared burner, in particular to an ignition control device for a household infrared gas burner. Background technique [0002] With the improvement of people's living standards, gas appliances, including household gas stoves, heaters, barbecues, etc. Performance and other characteristics have been accepted by the majority of home consumers, commercial users and industrial users. Since the infrared gas burner adopts a large primary air coefficient, that is, the gas concentration in the mixed gas after the gas is mixed with the primary air is low, therefore, the gas-air mixture escaped from the fire hole when ignited is fired with pulse electric spark or compressed air. It is difficult to ignite electric ceramics directly, and it is easy to cause deflagration. Generally, the ignition nozzle is used to ignite the main burner by the ignition burner to ignite the main burner. At the same time, for domes...

AI Technical Summary

Problems solved by technology

[0003] 1 The ignition burner is used to ignite the main burner from the periphery of the main burner. The structural design must keep a certain gap between the main burner and the soup plate or stove surface, otherwise it will affect the flame to ignite the main burner. This structure will Obviously affect the appearance of the product, make the product lifeless and have no market value; and the ignition flame beam is very large, which will burn the decorative board or the stove surface around the main burner, seriously affecting the appearance of the product, and there are many burners that do not burn. completely

[0004] 2. The external flame of the main burner with the ignition nozzle placed at the bottom of the main burner is used to ignite the main burner, then a. The main burner needs to be ignited through the central channel of the main burner. Tempering is easy to occur behind the plate, and it burns in front of the ignition nozzle, and the transmission distance is not enough to reach the main fire hole or the main fire plate, resulting in poor ignition or deflagration; b. The main burner needs to be ignited through the central channel, due to the limited diameter of the central channel , has a certain resistance to the propagation of the ignition flame. When the gas pressure of the pipe network is low, the ignition flame cannot overcome the resistance and reach the main fire hole, resulting in misfire; or when the gas pressure of the pipe network is high, the air in the central channel is ignited The generated flue gas is quickly exhausted, and the lack of oxygen in the channel restricts the transmission of the flame; or the ignition flame is relatively large and black and has obvious incomplete combustion, and the gas-air mixture of the main burner reaches the surface of the main combustion fire hole lagging behind. And the concentration is low, the pilot flame will lead to the bottom of the main burner when it cannot be ignited at the moment of ignition, due to the inertia of the flame, the pilot flame cannot be kept on the surface or side of the main combustion fire hole, and the main burner cannot be ignited normally; c. The structure of the ignition nozzle and the ignition bracket is relatively complicated, and it is installed in the narrow space of the bottom of the main burner or the central passage, which is not easy to install, and the reliability and accuracy of the installation are low, resulting in poor ignition performance of the product

[0005] 3. The ignition method in which the ignition spark is directly ignited on the surface of the infrared combustion radiation plate. Due to the large volume of the infrared main burner cavity, it takes a long time for the gas and air mixture to empty the original cavity, and the gas concentration is low. , making it difficult to ignite, and the ignition rate is low, especially when it is ignited with piezoelectric ceramics, it is basically difficult to ignite normally

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