CN2437975Y - Improved burner of domestic gas cooker - Google Patents

Abstract

An improved infrared burner for household gas cookers, which is composed of an ejector, a furnace chamber, and a combustion radiation plate. There is a metal bracket under the combustion radiation plate. It is characterized in that the combustion radiation plate has a large porosity and a single It is made of metal fiber sheet with small fire hole area and high hole density. Its advantages are that it does not require forced air blowing by a fan, and all the air required for combustion can be naturally ejected through low-pressure gas. It has good self-adjustment ability, wide adaptability, sufficient combustion, good combustion stability and long service life. Home Gas Cooktop With Radiant Burners. It can be applied to various gas sources such as liquefied petroleum gas, natural gas and artificial gas.

Description

An improved household gas cooker burner

The utility model relates to the improvement of the burner of the household gas cooker, in particular to the improvement of the infrared gas burner.

The known use of porous ceramic plates as the burner of the infrared gas cooker has many advantages compared with the atmospheric gas burner, and has been recognized by the world. But there are still many defects in this infrared burner made of ceramics. These defects are mainly manifested in the low porosity of the porous ceramic plate (generally all below 30%) and large fire hole area (generally above 0.8mm ² ) due to the manufacturing process. Using this type of burner, the combustion of gas is incomplete, the content of carbon monoxide in the flue gas is high, the performance is unstable, the service life is short, and the ability to resist tempering is poor. It is particularly difficult to adapt to the use requirements of artificial gas with fast burning speed.

It is known that there is an infrared burner that uses a metal fiber plate instead of a porous ceramic plate. The service life of this burner is longer than that of the porous ceramic plate, but because of the high density of the metal fiber, the porosity is very low, resulting in large ejection resistance. The air required for combustion can only be injected by forced air supply, or under extremely high gas pressure. Moreover, even if it is used under such conditions, the carbon monoxide content in the stove flue gas is quite high. In China, the gas supply standard is the low-pressure supply in front of the cooker (including: liquefied petroleum gas 280mmH ₂ O, natural gas 200mmH ₂ O, artificial gas 100mmH ₂ O), if the cooker is designed to be more than twice the pressure of this standard, it will not work However, the air blast type forced to supply the air required for combustion requires other supporting devices such as motors, mains power, and impellers. Due to the use of household stoves, multi-stage firepower adjustment is required. In order to ensure the functional requirements of use, it must be equipped with proportional control valves and Electronic controllers, etc. increase the cost, which is generally several times that of the natural injection type. Like this, greatly limit the use and the development of this burner.

The purpose of the utility model is to provide an infrared gas burner which adopts a natural injection method, can adapt to various gas sources, has safe combustion, good combustion stability, long service life and low production cost.

The above purpose of the utility model is achieved in the following way: an infrared gas burner is composed of an injector (1), a furnace cavity (2), a combustion radiation plate (3) and a metal bracket (4), wherein the combustion The radiant plate (3) is made of a metal fiber burning plate with a porosity greater than 40% and a single fire hole area less than ^0.4mm2 , and the metal bracket (4) is placed under the burning radiant plate (3) to prevent the metal fiber from burning The plate (3) is deformed by high temperature during use. In order not to increase the ejection resistance and affect the ejection of the primary air, the specification of the hole of the metal bracket (4) should be below 30 orders, and the porosity should be greater than 80%. According to the above design, enough primary air can be injected under the low-pressure gas, and the mixture of gas and air can pass through many small holes in the metal fiber combustion plate (3) to spread evenly on the surface of the metal fiber radiant plate (3). combustion. Because the surface of the single fire hole on the combustion radiant plate (3) is extremely small, it has extremely strong tempering resistance and good combustion stability, and can be simultaneously applicable to liquefied petroleum gas, natural gas and artificial gas from various places. Even if artificial gas with a combustion potential of 130 is used, there will be no backfire phenomenon. The metal fiber material is used as the combustion plate, its service life is greatly increased, and its quality stability is also very good, and the general collision of long-distance transportation will not affect its product performance. The metal fiber combustion board (3) adopted in the utility model can be a braided metal fiber board or a sintered metal fiber board.

Compared with the ordinary porous ceramic radiant plate infrared burner, the utility model has significant advantages such as long service life, good quality stability, strong tempering resistance and wide application range; Compared with infrared burners, it has the advantages of low production cost and sufficient combustion.

Below in conjunction with the explanation to accompanying drawing and provide embodiment, the utility model is further described:

Fig. 1 is the sectional view of the utility model (without central hole in the burner);

Fig. 2 is the sectional view of the utility model (there is center hole in the burner).

Example 1:

An improved household gas cooker burner is composed of an ejector 1, a furnace cavity 2, and a combustion radiation plate 3. Combustion radiation plate 3 has a porosity of 50%, and a metal fiber combustion plate with a single fire hole area not greater than 0.2 square millimeters. There is a metal bracket 4 under the metal fiber combustion plate 3 . The specification of metal bracket 4 is 15 orders, and the metal bracket net of porosity 90%. Metal fiber combustion board 4 adopts braided metal fiber board, and the shape of its combustion board surface is the garden shape of φ 150mm, and the heat flux of burner is not less than 2500Kcal/h.

Example 2:

Basically the same as embodiment 1, the difference is that there is a central hole with a diameter of about φ25mm in the middle of the burner, and a fire submersion sensing needle, an ignition needle or an ignition channel can be placed in the central hole.

Example 3:

It is basically the same as embodiment 1 or 2, except that the metal fiber combustion board 4 is a sintered metal fiber board.

Claims (4)

1, a kind of modified household gas utensils burner is made up of injector (1), furnace chamber (2), burning radiation plate (3), it is characterized in that burning radiation plate (3) be with porosity greater than 40%, single fire hole area is less than 0.4mm ²The metallic fiber burner plate make, there is a metal bracket (4) below in burning radiation plate (3).

2, modified household gas utensils burner according to claim 1 is characterized in that the specification in the hole of metal bracket (4) is not more than 30 orders, porosity is not less than 80%.

3. modified household gas utensils burner according to claim 1 is characterized in that metallic fiber burning radiation plate (3) can make with Weaving type metallic fiber plate.

4. modified household gas utensils burner according to claim 1 is characterized in that metallic fiber burning radiation plate (3), can make with the sintering type metal fiberboard.

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