CN101706101B - Burner for gas stove - Google Patents

Abstract

The invention discloses a burner for a gas stove, which belongs to kitchen equipment and solves the problem that the traditional swirl burner emits a large amount of CO and NOx and is expected to be further improved in burning efficiency. In the burner, a nozzle is inserted into an induction tunnel fixedly connected with a base, the upper part of the base is a variable-diameter cylinder, a partition board is arranged at the position where the diameter makes a change, base space under the partition board forms a gas mixing chamber, the partition board is provided with N burner tubes which are uniformly distributed along a circumference, N is between 4 and 10, the burner tubes are hollow tubes of which the top ends are sealed and the lower end is communicated with the gas mixing chamber, and the lateral sides of the top ends of the burner tubes are provided with rectangular fire holes outward along the radius of the circumference. The burner has the advantages that: the rectangular fire holes are intensively arranged; heating is uniform; the distance from the fire holes to the bottom of a pan is reduced; the contact time of high-temperature fume and the bottom of the pan is prolonged; an energy gathering ring can be used to prevent air, collect heat and save energy; the radiated heat of the high-temperature fume is reduced; the burning efficiency is greatly improved; and the CO and NOx exhaust emission is reduced. Thus, the burner reaches national standards for energy conservation and environmental protection.

Description

Burner for gas cooker

technical field

The invention belongs to kitchen equipment, in particular to a household gas cooker.

Background technique

Domestic gas stoves used DC burners earlier, and the fire holes are relatively scattered. It is difficult for the combustion flame to fully mix with the secondary air, resulting in a decrease in combustion efficiency. The high CO and NOx emissions in the flue gas will reduce the efficiency of the stove and waste energy. At present, domestically applied or newly developed gas stoves generally use swirl burners. Although swirl burners can use the principle of swirl jets to produce stable internal swirling flame combustion, at the same time, the mixture of gas and flue gas can be compared with secondary air. However, there is still a lot of room for improvement in combustion efficiency, and at the same time, CO and NOx are relatively large in flue gas emissions. Moreover, if the position of the swirling flame hole is not arranged reasonably, the CO content in the flue gas will rise sharply. At present, the efficiency of the mainstream swirl gas stoves sold in the market is about 53%.

Contents of the invention

The invention provides a burner for a gas cooker, which solves the problems of large CO and NOx emissions and further improvement of combustion efficiency of the existing swirl burner, so as to meet the national energy-saving and environmental protection standards.

A burner for a gas cooker according to the present invention includes a nozzle, an injection pipe, and a base, the nozzle is inserted into the injection pipe, and the injection pipe is fixedly connected to the base, and is characterized in that:

The upper part of the base is cylindrical with different diameters, and there is a partition at the place where the diameter changes. The base space below the partition constitutes an air mixing chamber. There are N combustion tubes evenly distributed on the circumference on the partition, and the circumference radius is 50-70mm, N=4-10; the combustion tube is a hollow round tube with a closed top, and its lower end communicates with the gas mixing chamber. outward along the circumference radius.

The burner is characterized in that:

The inner diameter of the combustion tube is 8-14 mm, and the angle of the circumference corresponding to the opening of the rectangular fire hole on the circumference of the combustion tube cylinder is 240°-300°; the outlet of the rectangular fire hole is 3-5 mm away from the top of the combustion tube and 50° ~70mm.

The burner is characterized in that:

The upper diameter cylindrical side of the base is provided with air inlet holes evenly distributed along the circumference; the larger diameter cylindrical shape is supported with a rounded frustum-shaped energy gathering ring, and the upper end of the inner surface of the energy gathering ring is Supports for placing pans are evenly distributed.

When the present invention works, the fuel is ejected from the nozzle, and a part of air (primary air) is injected under a certain pressure into the mixing chamber through the injection pipe, and the secondary air can be supplemented by the air inlet on the upper part of the base. The premixed fuel and air mixture passes through the cylindrical passages of N combustion tubes, and is sprayed out from the upper rectangular fire holes of the cylindrical passages. The conical protrusions on the top of the combustion tubes can improve the gas flow and play a diversion effect. At the same time, an energy gathering ring can be arranged around the rectangular fire hole on the upper part of the base to prevent wind, heat collection and energy saving.

The rectangular fire holes of the present invention are arranged in a concentrated way, and the firepower is relatively concentrated, so that the power of the gas stove is relatively large. At the same time, because the combustion tube reduces the distance between the bottom of the pot and the rectangular fire holes, the distance between the main combustion area and the bottom of the pot is shortened, and the high-temperature flue gas and the bottom of the pot are increased. The contact time of the pot surface reduces the energy loss, makes the heating more uniform and the heat absorption efficiency is higher. Generally, if the distance between the bottom of the pot and the fire hole is reduced, the secondary air supply will be insufficient, the combustion will be incomplete, and black smoke will be generated, resulting in low efficiency and waste of energy. However, the gas cooker of the present invention does not have these problems. When the distance between the rectangular fire hole and the bottom of the pot is close, the CO and NOx emissions are very low. The temperature inside the energy-concentrating circle is higher, and the emission of CO and NOx in the flue gas is reduced. It is proved by experiments that with the gas stove of the present invention, the heat absorption efficiency of the pot surface reaches 65%, and the CO emission is below 100ppm, and the NOx emission is below 100ppm, which are far below the national energy conservation and environmental protection requirements.

Description of drawings

Fig. 1 is a top view of an embodiment of the present invention;

Fig. 2 is A-A sectional view among Fig. 1;

Fig. 3 is a schematic perspective view of an embodiment of the present invention.

Detailed ways

As shown in Figures 1 and 2, in this embodiment, the nozzle 5 is inserted into the injection tube 4, the injection tube 4 is fixedly connected to the base 7, and the upper part of the base 7 is cylindrical with different diameters. There is a baffle, and the base space below the baffle constitutes the air-mixing chamber 3. On the baffle, there are 6 combustion tubes 8 evenly distributed on the circumference, and the radius of the circumference is 60mm. The combustion tube 8 is a hollow circular tube with a closed top, and its lower end It communicates with the gas mixing chamber 3, the top of the combustion tube has a conical protrusion 2, the side of the top of the combustion tube has a rectangular fire hole 1, and its direction is outward along the radius of the circumference, and an energy gathering ring 6 can be arranged around the combustion tube 8 , to prevent wind and heat collection and save energy.

The fuel is ejected from the nozzle 5, and a part of the air (primary air) is injected under a certain pressure into the air mixing chamber 3 from the injection pipe 4, and the secondary air can be supplemented by the air inlet on the upper part of the base 7. The mixture of premixed fuel and air is ejected through the upper rectangular fire holes 1 of the cylindrical passages of six combustion tubes 8 .

The circumference angle corresponding to the opening of the rectangular fire hole on the cylinder circumference of the combustion tube, the distance from the outlet of the rectangular fire hole to the top of the combustion tube, the height from the dividing plate, and the number of combustion tubes can be determined by the power of the gas stove and the type of gas.

In this embodiment, the inner diameter of the combustion tube is 12 mm, the angle of the opening of the rectangular flame hole on the cylinder circumference of the combustion tube is 270°, the outlet of the rectangular flame hole is 4 mm from the top of the combustion tube, and 60 mm from the partition.

The layout position of each rectangular fire hole determines the degree of concentration of firepower and the state of combustion. If the fuel is different and the power of the gas stove is different, the conditions and positions of the formation of CO and NOx are different, and the size parameters of a single rectangular fire hole are different. By adjusting the size of the rectangular fire hole and the size of the cylindrical channel of the combustion tube, the fuel Combustion in a suitable area is not only conducive to complete combustion, but also inhibits the formation of NOx to achieve efficient and clean combustion.

The use of the burner can greatly reduce the emission of CO and NOx in the flue gas, while improving the overall heat absorption efficiency. If the proportion of primary and secondary air is optimally designed, and the position of each fire hole is arranged reasonably, the heat absorption efficiency of the pot surface will be further improved, and the emission of CO and NOx in the flue gas will be further reduced.

Claims (3)

1. A burner for a gas cooker, comprising a nozzle, an ejector pipe, and a base, the nozzle is inserted into the ejector pipe, and the ejector pipe is fixedly connected with the base, and is characterized in that: The upper part of the base is cylindrical with different diameters, and there is a partition at the place where the diameter changes. The base space below the partition constitutes an air mixing chamber. There are N combustion tubes evenly distributed on the circumference on the partition, and the circumference radius is 50-70mm, N=4-10; the combustion tube is a hollow round tube with a closed top, and its lower end communicates with the gas mixing chamber. outward along the circumference radius. 2. The burner according to claim 1, characterized in that: The inner diameter of the combustion tube is 8-14 mm, and the angle of the circumference corresponding to the opening of the rectangular fire hole on the circumference of the combustion tube cylinder is 240°-300°; the outlet of the rectangular fire hole is 3-5 mm away from the top of the combustion tube and 50° ~70mm. 3. The burner according to claim 1 or 2, characterized in that: The upper diameter cylindrical side of the base is provided with air inlet holes evenly distributed along the circumference; the larger diameter cylindrical shape is supported with a rounded frustum-shaped energy gathering ring, and the upper end of the inner surface of the energy gathering ring is Supports for placing pans are evenly distributed.

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