KR101080305B1 - Environment-friendly High efficiency household gas range having Surface Combustion type knitted metal fiber mat gas burner - Google Patents

Abstract

The present invention is equipped with a surface combustion gas burner of a premixed combustion method in which combustion air and gas fuel are premixed in a ratio of 1: 1 using a knitted metal fiber mat of a metal fiber woven structure. In the domestic gas stove, the combustion surface material corresponding to the head of the Bunsen-type gas burner, which is mainly used as a burner for a conventional domestic gas stove, is made of a porous metal plate (Knitted Metal Fiber Mat). It is equipped with a high efficiency, high-efficiency surface combustion gas burner with a high preload and high efficiency, and a safe premixed combustion method that not only reduces emissions of pollutants (NOx, CO, etc.) generated during combustion, but also does not cause back fire. To a domestic stove.

Premixed Combustion Method, Surface Combustion Gas Burner, Environment-Friendly, High Efficiency, Household Gas Stove

Description

Environment-friendly High efficiency household gas range having Surface Combustion type knitted metal fiber mat gas burner}

The present invention is equipped with a surface combustion gas burner of a premixed combustion method in which combustion air and gas fuel are premixed in a ratio of 1: 1 using a knitted metal fiber mat of a metal fiber woven structure. In the domestic gas stove, the combustion surface material corresponding to the head of the Bunsen-type gas burner, which is mainly used as a burner for a conventional domestic gas stove, is made of a porous metal plate (Knitted Metal Fiber Mat). It is equipped with a high efficiency, high-efficiency surface combustion gas burner with a high preload and high efficiency, and a safe premixed combustion method that not only reduces emissions of pollutants (NOx, CO, etc.) generated during combustion, but also does not cause back fire. To a domestic stove.

In general, a conventional household gas stove is provided with bunsen gas burners on both sides of the domestic gas stove to form a cooking chamber for cooking fish, etc. between the two inner spaces of the bunsen gas burners, and the upper or left and right sides of the cooking chamber. The ceramic burner or bunsen grill burner is installed in the oven to heat the food.

As described above, most of the gas burners which are widely used in the gas combustion equipment such as the domestic gas stoves mainly adopt the Bunsen gas burner because of the low risk of the flame stability and the backfire of the burners. Gas burners are not only structurally burner long and flame temperature high, but also the amount of heat loss and environmental pollutants caused by the high-temperature exhaust gas because the amount of air required for combustion requires much more air than theoretical air. Due to the large amount of emissions (NOx and CO, etc.), there are some limitations in maximizing the efficiency of gas burning equipments such as household gas stoves and reducing pollutants.

In particular, conventional household gas stoves, which generate a large amount of environmental pollutants such as carbon monoxide (CO) and nitrogen oxides (NOx), are mainly used in indoors with high heat insulation or airtightness to prevent heat loss during heating and cooling. Due to insulation and airtightness, indoor air pollutants generated during combustion of gas stoves and indoor air pollution are caused due to insufficient ventilation due to indoor airtightness. On average, more than 90% of the time For those who send indoors, not only can they cause respiratory failure due to air pollution in the room, but also have a number of adverse effects on health, but conventional household stoves have been used without any serious attention to these problems until now. Coming.

In the case of a Bunsen gas burner (3) installed in a conventional domestic stove, inevitably, about 40% of the air required for combustion is taken as primary combustion air and the remaining about 60% as secondary combustion air. As a result, in the case of the conventional domestic gas stove, the air in the room is taken as primary and secondary combustion air, and when the household gas stove is used, the inside of the room is greatly contaminated.

In general, the thermal efficiency of a domestic stove is expressed as the ratio of heat required to raise the temperature of the water in the measuring pot to the heat corresponding to the amount of gas supplied for a predetermined time, and the thermal efficiency of a conventional stove is about 35 to 45%. In addition, the burner's flame is easily extinguished by the wind or the flame is blown, and the amount of heat applied to the food is lost. In addition to wasting gas fuel, the flame of the gas burner is often extinguished due to the overflowing soup during cooking, and there are many disadvantages that are dangerous for safety such as a gas explosion accident due to leakage of unburned gas. In particular, it is installed on the upper or left and right sides of the cooking chamber for cooking fish, etc. Ceramic gas burners or bunsen grill burners are fragile due to heat brittleness, so they are easily broken by liquid components such as oil or water generated when cooking food inside the cooking chamber, and soups flowing when cooking food is heated. Or the flame is extinguished.

Accordingly, the present invention is invented to solve the above problems, instead of the bunsen gas burner mounted on both sides of the conventional domestic gas stove and the ceramic gas burner or bunsen grill burner mounted on the upper or left and right sides of the cooking chamber. Pre-mixed surface burner gas burner that uses Knitted Metal Fiber Mat to improve thermal efficiency and emits low pollutants (low CO and low NOx) while improving thermal efficiency compared to conventional domestic gas stoves. It is aimed to greatly reduce the pollution of indoor air by installing

In addition, unlike the case of Bunsen gas burners, the porous body plate, which is a metal fiber woven structure of the premixed surface burner gas burner corresponding to the salt hole of the existing Bunsen gas burner, is strong and uniform generated from the combustion surface by the surface combustion method. It is a high load combustion structure that can simultaneously use the solid radiant energy and the convective low heat effect of high temperature combustion gas.Therefore, the gas burner's flame is not extinguished or the flame is blown by strong wind. The flames do not go out even when the soup overflows when cooking, and the gas explosion caused by the leak of unburned gas can be prevented in advance, and it is more compact than the conventional domestic gas stove, The heat efficiency of the stove is a domestic stove that adopts Bunsen gas burner Compared to the above, it is possible to greatly improve by about 10-25% and to provide a safe, environmentally friendly, high efficiency household gas stove by installing a pre-combustion type surface combustion gas burner.

The present invention for achieving the above object, the front is provided with a knob on both sides, the center is provided with a cooking chamber and the top is open and the gas burner is provided on both sides of the inside, and the upper opening of the main body In a typical domestic household gas stove composed of a top plate that prevents and is installed on both sides of the gas burner, the gas burner is fixed to the main body, is connected to the gas pipe, and the external air flows into the mixing pipe, The burner head is provided on the upper side and the upper portion is opened, and the porous plate of the porous metal fiber woven structure in which the flame is generated through the gas ejected by blocking the upper opening of the burner head.

The present invention is configured to have a structure of less pressure drop and heat loss compared to the conventional domestic gas stove, and to improve the flame stability, uniformity and flame transition of the gas burner and the conventional gas burner for the domestic gas stove ( In addition to the simpler structure than 3), the flame is extinguished due to flashback phenomenon during combustion and the broth overflowing during the heating of wind and food, and the generation of unburned gas and gas explosion accident. In addition, the processability is easy, and the overall performance of the domestic gas stove is greatly improved, and the flame is stabilized, resulting in reduction of combustion noise generated during combustion and installation of surface combustion gas burners. By contributing to low pollution, it also contributes to reducing indoor pollution and enhancing the health of users. By improving the efficiency, it is possible to improve energy efficiency while improving the thermal efficiency of about 10 to 25% or more than conventional household gas stoves.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a perspective view illustrating a gas lens of the present invention, and FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1.

Knob 11 is provided on both sides of the front, and the cooking chamber 2 is provided at the center thereof, and the upper part is opened so that the gas burner 3 is provided at both sides thereof. In a typical domestic household gas stove composed of an upper plate (4) which blocks the upper opening and is mounted through the gas burner (3) on both sides,

The gas burner 3 is fixed to the lower part of the main body and connected to the gas pipe and the outside air flows into the mixing pipe 31, the burner head (top) is provided on the upper side of the mixing pipe 31 is opened ( 32) and a porous plate 33 of a porous metal fiber woven structure in which a flame is generated through a gas emitted by blocking an upper opening of the burner hag.

In addition, the mixing chamber 31 and the mixing chamber boundary in the burner head 32 having an expanded diameter than the mixing tube are mounted at the end of the mixing tube 31 to further mix the primary air and the gas discharged from the mixing tube. The porous plate 34 in a horizontal state in which a plurality of holes 341 are formed to cause vortices is further provided.

Therefore, the porous plate 33 having the porous metal fiber woven structure and the head portion of the surface combustion gas burner are fixed using a bracket method or a spot welding method, and the burner head 32 and the like. Fixing with the mixing tube 31 is fixed by a screw joint method that can be disassembled for cleaning or the like.

In addition, combustion air and gaseous fuel are smoothly mixed inside the surface combustion burner head using the porous plate 34 (Knitted Metal Fiber Mat), which is a porous metal fiber woven structure, through the porous plate 34. It can be distributed evenly without bias.

3 and 4 is an enlarged view of the cooking chamber according to the present invention, wherein the cooking chamber 2 is provided at both sides or the upper center of the inside and is connected to a gas pipe to supply gas and open the mixing chamber duct. And a grill gas burner 21 composed of a porous metal plate 212 of a porous metal fiber woven structure in which a flame is generated through a gas emitted by blocking the inside of the mixing chamber 211. .

Therefore, the porous body plate 212 having the porous metal fiber woven structure and the head portion of the surface combustion gas burner are fixed by using a bracket method or a spot welding method.

In addition, combustion air and gaseous fuel are smoothly mixed inside the surface combustion burner head using the porous plate 34 (Knitted Metal Fiber Mat), which is a porous metal fiber woven structure, through the porous plate 34. It can be distributed evenly without bias.

The following describes the working relationship of the present invention.

As shown in Figs. 1 to 3, a porous plate 33 of a metal fiber woven structure which is mounted as a combustion surface material of a premixed combustion type burner gas burner 3 for a domestic gas stove constituting the present invention; Fiber Mat) is a woven fabric made of a metallic material with a diameter of 50 μm or less and weaved like a fiber structure, and it is used as a combustion surface material of a gas burner for a domestic gas stove and is a combustible premixed gas (combustion air + gas fuel). And the combustion heat of the surface combustion gas burner (3), which is a knitted metal fiber mat (33), which is a metal fiber woven structure, as a heat of combustion, thereby heating the combustion surface of the gas burner (3). A solid radiant energy can be obtained, and the heat loss amount of the exhaust gas is reduced by reducing the amount of excess air for combustion and lowering the temperature of the combustion exhaust gas. The thermal efficiency of the gas stove can be increased, and the effect of suppressing the emission of environmental pollutants (NOx, CO, etc.) can be obtained, and the combustion load range (turndown ratio: TDR) of the surface combustion gas burner 3 can be obtained. ) Is considerably wider than that of the Bunsen gas burner (TDR = 5: 1) installed in the conventional domestic gas stove, and the flame stability is excellent and the structure is simple. It is also widely used as a combustion surface material for gas burners for home, commercial, and industrial use to improve thermal efficiency and reduce pollution.

In addition, the material of the porous plate (Knitted Metal Fiber Mat), which is a porous metal fiber woven structure, is lowered to the ignition temperature below the burner temperature due to the heat treatment effect, so that it is used as a combustion surface material of the gas burner to premix gas. When burning fuel, there is no risk of burner flame flowing back through the small hole of the porous body plate, and the flame does not go out due to the impact of falling of the soup or metallic material that flows during cooking. Known as a safe material that does not generate unburned gas, the surface burner gas burner (2) using a porous metal fiber woven structure (Knitted Metal Fiber Mat) (33) is used for backfire or soup of overflowing foods. There is no need for a separate countermeasure against a gas explosion due to leakage of unburned gas generated by the gas.

In particular, one of the methods for reducing the environmental pollutants (NOx and CO, etc.) and lowering the flame temperature of the gas burner is a premixed combustion method in which air for combustion and gas fuel are mixed in advance. In this combustion method, since the air supply method required for combustion is the first-order method, the primary air forms a high air ratio and prevents the production of both Prompt NOx and Thermal NOx due to the low combustion temperature. There is such an advantage.

Accordingly, the surface combustion gas burner 3 which performs premixed combustion according to the present invention has a mixed gas fuel inlet such that a primary air ratio of about 1.4 to 1.7 is introduced as a primary method of supplying combustion air. By adjusting the diameter size of the porous plate 34, the length of the gas nozzle, the diameter of the gas nozzle, and the like, respectively, the high efficiency of the surface burner gas burner 3 is achieved, thereby increasing the efficiency of the domestic gas stove and the surface burning. The internal pressure of the gas burner 3 is configured to have a low pressure drop, and the flame stability and uniformity of the surface-burning gas burner 3 are improved, and the noise generated during combustion is reduced. Compared to the Bunsen gas burner mounted on the stove, the overall performance and stability are improved.

In addition, when the combustion air or fuel gas flows to one side, the equivalence ratio is changed for each part, and eventually the flame on the burner surface is also inclined, resulting in poor combustion performance of the burner, and thus combustion air and gas fuel. The length of the mixing tube to be mixed is as short as possible and the gas fuel and the air for combustion are completely mixed without any bias in the flow of the mixed gas fuel even in a small space.

On the other hand, instead of the ceramic gas burner or bunsen grill burner mounted on the upper or both sides of the cooking chamber 2, a premixed rectangular shape that emits low pollutants (low CO and low NOx) using a porous plate of a metal fiber woven structure. By installing the type surface combustion grill gas burner 21, the pollution of the indoor air is greatly reduced, and at the same time, the porous body plate which is the metal fiber woven structure of the premixed surface combustion gas burner corresponding to the salt hole of the existing bunsen type gas burner ( Unlike the case of Bunsen gas burner, 212) is a high load combustion structure that can simultaneously use the strong and uniform solid radiant energy generated from the combustion surface by the surface combustion method and the convective subheat effect of the hot combustion gas. The gas burner's flame is not extinguished or the flame is not blown, so it can effectively use the heat of gas. D. The flame does not go out even when the soup overflows when the food is heated, and the gas explosion accident caused by the leak of unburned gas can be prevented in advance.

1 is a perspective view showing a gas lens of the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

Figure 3 is an enlarged perspective view of the cooking chamber according to the present invention.

Figure 4 is an enlarged perspective view showing another embodiment of the cooking chamber according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: main body

    11: knob

2: cooking chamber

    21: grill gas burner

         211: mixing chamber duct, 212: porous plate

3: gas burner

    31: mixing tube

    32: burner head

    33: porous plate

    34: perforated plate

         341: hall

Claims (1)

Knob 11 is provided on both sides of the front, and the cooking chamber 2 is provided at the center thereof, and the upper part is opened, and the main body 1 having the gas burner 3 on both sides thereof, and the upper opening part of the main body. In a typical domestic gas stove composed of a top plate (4) to block and to be mounted through the gas burner (3) on both sides, The gas burner 3 is fixed to the main body, is connected to the gas pipe, the mixing pipe 31 and the outside air is introduced, and the burner head 32 is provided on the upper side of the mixing pipe 31 is open And a porous plate 33 of porous metal fiber woven structure in which a flame is generated through a gas ejected by blocking an upper opening of the burner head; The mixing chamber 31 and the mixing chamber boundary in the burner head 32 having a diameter larger than the mixing tube 31 are installed at the end of the mixing tube 31 and discharged from the mixing tube 31. Further provided is a porous plate 34 in a horizontal state in which a plurality of holes 341 are formed so that the gas is further mixed to cause vortices; The cooking chamber 2 is selectively provided at both sides or the center of the inside, and is connected to the gas pipe to close the mixing duct 211 and the inner side of the mixing duct 211 where the gas is supplied and the inside is opened. Equipped with a high-efficiency gas burner of environmentally friendly surface combustion method characterized in that it further comprises a grill gas burner 21 consisting of a porous body plate 212 of a porous metal fiber woven tissue in which a flame is generated through the gas is ejected High efficiency household gas stove.

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