Annular thin flame burner for gas stove

Abstract

The application discloses a gas stove annular thin fire combustor, which comprises an injection pipe and a head part, the head part is provided with an annular fire cover to form a ring of uniform open upward annular fire hole channels of mixed gas communication cavities, the included angle alpha between the axis of the annular fire hole channels and the central axis of the fire cover is 45-65 degrees, the upper opening part of the annular fire hole channels is an annular fire hole, and the hollow part of the fire cover is a secondary air channel. The application has the advantages of simple structure, more sufficient gas combustion, reduced negative influence of flue gas, improved thermal efficiency, and more environmental protection and energy saving.

Description

TECHNICAL FIELD

[0001] The present application relates to a gas stove, more particularly to a gas stove burner. BACKGROUND

[0002] The gas stove is an important kitchen appliance in the cooking process, and the burner is an important device for the gas stove to achieve the purpose of cooking. Heat efficiency and CO concentration in dry flue gas are two important indicators of household gas stoves. Taking the atmospheric embedded stove as an example, the national standard GB16410-2020 "Household Gas Stove" stipulates that the heat efficiency is greater than or equal to 55%, and the CO concentration in dry flue gas is less than or equal to 0.05%; GB30720-2014 "Household Gas Stove Energy Efficiency Limit Value and Energy Efficiency Grade" stipulates that the first level energy efficiency heat efficiency is greater than or equal to 63%; and the group standard T / CNHA1023-2020 "Leader Standard Evaluation Requirements Household Gas Stove" stipulates that the advanced level requires heat efficiency to be greater than or equal to 70%, and the CO concentration in dry flue gas is less than or equal to 0.03%. Therefore, how to make the gas fully burn, reduce the emission of harmful flue gas, and improve the heat efficiency of the stove is very important.

[0003] Compared with direct fire and rotational flow fire, annular fire has more advantages in improving the above performance. Chinese patent authorization announcement No. CN208871626U discloses a gas stove annular fire rotational flow burner. There is a gap between the annular fire cover and the burner cover to form an annular fire hole passage opening upward. The burner cover in the annular fire hole passage is provided with a plurality of straight strip gap air outlet holes which are rotationally symmetrical and uniformly distributed. The flame is annular and narrow. The secondary air can be fully supplemented from both sides of the flame, so that the gas burns more fully, the CO content in the flue gas is reduced, the heat conduction and radiation heat transfer of the flame to the fire cover are also reduced, and the heat load is improved. However, the burner cover structure with a plurality of straight strip gap air outlet holes increases the flow resistance of the gas, weakens the air induction performance of the burner, and the CO concentration in the flue gas caused by gas combustion is still high. Moreover, the shape of the burner cover is complex, the processing technology is complicated, and the manufacturing cost is high. SUMMARY

[0004] The purpose of the present application is to improve the defects of the prior art, and to provide an annular thin fire burner with simple structure, energy saving and environmental protection.

[0005] To achieve the above purpose, the following technical scheme is adopted. An annular thin fire burner for a gas stove includes an injection pipe and a head portion. The head portion is provided with an annular fire cover to form a ring of uniformly connected gas mixing cavities, and an annular fire hole passage opening upward. The angle α between the axis of the annular fire hole passage and the central axis of the fire cover is 45°~ 65°. The upper opening portion of the annular fire hole passage is an annular fire hole. The hollow portion of the fire cover is a secondary air passage.

[0006] Further, the angle a between the axis of the annular fire hole channel and the central axis of the fire cover is 60°.

[0007] Further, the head further comprises an annular burner cover, which is high inside and low outside, and the annular fire hole channel is a uniform gap between the burner cover and the fire cover.

[0008] Further, the above-mentioned burner central part is further provided with a small fire burner, and a gap between the fire cover and the small fire burner is a secondary air channel.

[0009] Further, the small fire burner comprises a small fire injection pipe and a small fire burner head, the small fire burner head is provided with an annular small fire cover to form a ring of uniform open upward small fire annular fire hole channel of the gas mixture cavity, the angle β between the axis of the small fire annular fire hole channel and the central axis of the small fire cover is 20°-60°, the upper opening part of the small fire annular fire hole channel is a small fire annular fire hole, and the hollow part of the small fire cover is a secondary air channel.

[0010] Further, the angle β between the axis of the small fire annular fire hole channel and the central axis of the annular fire cover is 40°.

[0011] Further, the small fire burner head further comprises an annular small fire burner cover, which is high inside and low outside, and the small fire annular fire hole channel is a uniform gap between the small fire burner cover and the small fire cover.

[0012] Further, the small fire burner head further comprises an annular small fire cover outer ring, and the small fire annular fire hole channel is a uniform gap between the small fire cover outer ring and the small fire cover.

[0013] Further, the small fire cover is provided with two fire guide grooves.

[0014] Further, the small fire burner is a straight fire small fire cover.

[0015] Compared with the prior art, the structure of the burner cover is optimized, the strip-shaped gap hole is cancelled, the processing technology is simplified, the manufacturing cost is reduced, the air induction capacity of the burner is improved, the angle of the annular fire hole is optimized, the flame form adopts annular thin fire, the gas combustion is more sufficient, the negative influence of the flue gas is reduced, the thermal efficiency is improved, and the product is more environmentally friendly and energy-saving. The burner adopts main fire and small fire double annular thin fire, the annular fire cover and the burner cover use thin plate cold punching process, can be sleeved with materials, improves the material utilization rate, and reduces the product cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic structural view of the annular thin fire main burner of the present application.

[0017] Figure 2is the schematic structural diagram of the annular thin fire main burner and small fire burner of the present application.

[0018] Figure 3 is Figure 2 the bottom view structural diagram.

[0019] Figure 4 is the schematic structural diagram of the annular thin fire main burner and another small fire burner of the present application. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below with reference to the accompanying drawings.

[0021] As Figure 1 , Figure 2 shown, an annular thin fire main burner, completely updraft burner, comprises a main ejector pipe 11 and a head, the head comprises a disc-shaped main burner seat 12, an annular main burner cover 13 and an annular main fire cover 14, the main burner cover 13 and the main fire cover 14 are respectively in sealing cooperation with the outer edge and the inner ring of the main burner seat 12, the main burner seat 12, the main burner cover 13 and the main fire cover 14 enclose a gas mixing cavity 15, the uniform gap between the main burner cover 13 and the main fire cover 14 is a main annular fire hole passage 16, the main annular fire hole passage 16 communicates with the gas mixing cavity 15, and the upper opening part of the main annular fire hole passage 16 is a whole-circle main annular fire hole 17. The hollow part of the main fire cover 14 is a secondary air passage 18; the main burner cover 13 is high inside and low outside, facilitating the secondary air to be supplemented from the four sides of the burner to the main annular fire hole 17. The main ejector pipe 11 is arranged below the main burner seat 12, the gas and the primary air enter the gas mixing cavity 15 in the tangential direction, are fully mixed and then are sprayed out from the main annular fire hole 17 of the main annular fire hole passage 16 to burn, the burning flame is in the form of upward annular thin fire, the secondary air can be fully supplemented from both sides of the flame, the secondary air is supplemented from the four sides of the burner and the secondary air passage 18 respectively, the gas burning is more sufficient, the CO content in the flue gas is reduced, the main annular fire hole 17 is located at the upper side, the flame is relatively narrow and does not adhere to the main fire cover 14, therefore the heat conduction and the radiation heat transfer of the flame to the main fire cover 14 are reduced, the radiation heat transfer below the burner is also reduced, the temperature rise of each component below the burner is obviously reduced compared with the general burner, the thermal efficiency is improved, and the reliability and the service life of the stove are also improved.

[0022] The flame angle is determined by the main annular flame hole passage 16, which has a great influence on the performance of gas combustion. If the included angle a between the axis of the annular flame hole passage 16 and the central axis of the main flame cover 14 is too small, the flame will contact a larger area of the pot bottom upward, and the heat efficiency will be improved, but the flue gas content will also be higher. If the included angle a is too large, the flame will contact a smaller area of the pot bottom upward, and more heat will be lost to the periphery, so the flue gas content will decrease, and the heat efficiency will become lower. In order to balance the two important indicators of heat efficiency and CO concentration in flue gas, the included angle a is selected to be 45°-65°, and 60° is the optimal value.

[0023] As shown in Figure 2 , Figure 3 A double annular thin flame burner, a complete updraft burner, comprises the main burner described above, and further comprises a small flame burner located at the central part of the main burner. The small flame burner comprises a small flame injector 21 and a small flame burner head. The small flame burner head comprises a disc-shaped small flame burner seat 22, an annular small flame burner cover 23, and an annular small flame cover 24. The small flame burner cover 23 and the small flame cover 24 are respectively in sealing cooperation with the outer edge and the inner ring of the small flame burner seat 22. The small flame burner seat 22, the small flame burner cover 23, and the small flame cover 24 enclose a small flame gas mixing chamber 25. The uniform gap between the small flame burner cover 23 and the small flame cover 24 is a small flame annular flame hole passage 26. The small flame annular flame hole passage 26 is connected to the gas mixing chamber 25. The upper part of the small flame annular flame hole passage 26 is a complete circle of small flame annular flame holes 27. The hollow part of the small flame cover 24 is a secondary air passage two 28. The small flame burner and the main burner are connected by a secondary air passage one 18. The small flame burner cover 23 is high inside and low outside, which facilitates the supply of secondary air to the small flame annular flame hole 27 from the secondary air passage one 18. The small flame injector 21 is arranged below the small flame burner seat 22. Gas and primary air enter the small flame gas mixing chamber 25 in a tangential direction, mix fully, and then burn out of the small flame annular flame holes 27 of the small flame annular flame hole passage 26. The combustion flame is in the form of an annular thin flame. Secondary air can be fully supplemented from both sides of the flame. Secondary air is supplemented from the secondary air passage one 18 and the secondary air passage two 28 (at this time, the secondary air passage one 18 also provides secondary air to the main flame and the small flame), so that the gas burns more fully, and the purpose of reducing flue gas content and improving heat efficiency is achieved, just like the main burner. Similarly to the main burner, the included angle β between the axis of the small flame annular flame hole passage 26 and the central axis of the small flame cover 24 needs to be limited. In order to prevent the main flame and the small flame from interfering with each other and causing insufficient combustion, the included angle β is selected to be 20°-60°, and 40° is the optimal value. The ignition needle and thermocouple of the stove are arranged in the secondary air passage two 28. Two ignition grooves 29 are provided in the small flame cover 24 correspondingly. Through testing, the two indicators of heat efficiency and CO concentration in dry flue gas completely meet and are superior to the requirements of national standards and first-class energy efficiency.

[0024] When the thin plate cold punching process is used for processing, the excess material of the main burner cover 13 can be used to process the small fire burner cover 23 or the small fire cover 24, and the excess material of the main fire cover 14 can be used to process the small fire cover 24, thereby improving the material utilization rate and reducing the product cost.

[0025] As shown in Figure 4 The small fire burner cover 23 of the small fire burner can be replaced by a small fire cover outer ring 30, the small fire annular fire hole passage 26 is a uniform gap between the small fire cover outer ring 30 and the small fire cover 24, the included angle α is 60°, and the included angle β is 55°. The ignition needle and the thermocouple of the cooking appliance are arranged in the secondary air passage 18, and the small fire cover 24 does not need to open an ignition groove. The temperature sensor 31 and the sensor heat insulation sleeve 32 can also be arranged in the secondary air passage 28 to assist in realizing the dry burning prevention or intelligent cooking function of the gas stove. The sensor heat insulation sleeve 32 comprises a support, a support pipe, a heat insulation sleeve and a compression spring, and the heat insulation sleeve can slide up and down along the support pipe.

[0026] A burner, the main burner adopts the above-mentioned annular thin fire burner, and the small fire burner adopts an ordinary straight fire small fire cover. The present application can also adopt other air inlet form burners.

Claims

1. A ring-shaped thin-flame burner for a gas stove, comprising an injector tube and a head, characterized in that, The head includes an annular flame cap (14), an annular burner cap (13), and a disc-shaped burner seat (12); The burner base (12), burner cover (13) and flame cap (14) together form a gas mixing chamber (15); The fire cap has a hollow part, which serves as a secondary air passage (18); The end of the burner cap (13) away from the burner seat (12) and the end of the flame cap (14) away from the burner seat (12) are joined together to form a uniform circumferentially connected annular gap, which serves as an annular flame hole channel. The annular flame hole channel has an upper opening at the upper end and a lower opening at the lower end. The lower opening serves as the inlet of the gas-air mixture and its opening faces downward, communicating with the gas mixing chamber (15). The upper opening serves as the outlet of the gas-air mixture, forming a complete annular flame hole with its opening facing upward. The gas-air mixture in the gas mixing chamber (15) enters from the lower opening of the annular flame hole channel and exits from the annular flame hole at the upper opening. The burner cover is higher inside and lower outside, and the angle α between the axis of the annular fire hole channel and the central axis of the burner cover is 45° to 65°. The burner cover (13) is sealed to the outer edge of the burner seat (12) at one end near the burner seat (12), and the flame cap (14) is sealed to the inner ring of the burner seat (12) at one end near the burner seat (12). The burner cap has a first downward-bending edge at its highest point, and the flame cap has a second outward-bending edge at its highest point. The first and second bending edges define an annular flame hole channel that bends outward.

2. The burner according to claim 1, characterized in that, The angle α between the axis of the annular fire hole channel and the central axis of the fire cap is 60°.

3. The burner according to claim 1 or 2, characterized in that, The burner is also equipped with a small flame burner in the center, and there is a gap between the flame cap and the small flame burner as the secondary air passage (18).

4. The burner according to claim 3, characterized in that, The small flame burner includes a small flame injector tube and a small flame burner head. The small flame burner head is provided with an annular small flame cap to form a uniform ring of small flame annular flame holes that open upwards and connect to the gas mixing chamber. The angle β between the axis of the small flame annular flame hole channel and the central axis of the small flame cap is 20° to 60°. The upper part of the small flame annular flame hole channel is a small flame annular flame hole. The hollow part of the small flame cap is a secondary air channel (28).

5. The burner according to claim 4, characterized in that, The angle β between the axis of the small flame annular flame hole channel and the central axis of the small flame cap is 40°.

6. The burner according to claim 4, characterized in that, The head of the small flame burner also includes an annular small flame burner cover, which is higher inside and lower outside, and the annular flame hole channel is a uniform gap between the small flame burner cover and the small flame cover.

7. The burner according to claim 4, characterized in that, The burner head also includes an annular outer ring of the small flame cap, and the annular flame hole channel is a uniform gap between the outer ring of the small flame cap and the small flame cap.

8. The burner according to claim 4, characterized in that, The small flame cap has two ignition slots.

9. The burner according to claim 3, characterized in that, The small flame burner is a direct flame small flame cap.

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