A burner

Abstract

The present invention belongs to a gas stove, specifically referring to a burner, which comprises a base, a flow guide seat and a burner cap arranged together in sequence from bottom to top. The burner cap includes an inner burner cap and an outer burner cap, and the outer burner cap surrounds the inner burner cap. An exhaust gas port is formed on the flow guide seat, and the exhaust gas port is located between the inner burner cap and the outer burner cap. An exhaust gas gap is formed between the flow guide seat and the base, and the exhaust gas gap communicates with the exhaust gas port. The present invention provides a burner that facilitates the discharge of exhaust gas.

Description

Technical Field

[0001] The present invention belongs to gas stoves, and particularly refers to a burner. Background Art

[0002] A gas stove refers to a kitchen appliance that uses gaseous fuels such as liquefied petroleum gas, artificial gas, and natural gas for direct-fire heating. The following is a brief introduction to its working principle: When the gas stove is working, gas enters the stove from the gas inlet pipe. The gas first mixes with a part of air (this part of air is called primary air) on the base (also known as the stove rack, support). The mixed gas is then ejected from the fire holes of the burner and ignited by the ignition device to form a flame (the air required for combustion is called secondary air).

[0003] There is a conventional upward air intake burner, which includes a base and a mixer. The mixer is installed on the base, and an outer fire cover and an inner fire cover are installed on the mixer. A secondary air inlet is provided on the side wall of the mixer, and an outer annular groove is formed on the mixer. Gas can flow into the outer annular groove. The outer annular groove is located above the secondary air inlet. The design of the secondary air inlet facilitates air to enter between the inner fire cover and the outer fire cover, achieving the effects of assisting combustion and improving thermal efficiency.

[0004] However, the existing technology is not perfect. The waste gas (mainly carbon dioxide) generated by the combustion of fuel on the inner fire cover and the outer fire cover cannot be discharged in time, which will play a role in flame retardation and incomplete combustion. Therefore, there is a problem of low thermal efficiency. Summary of the Invention

[0005] To overcome the deficiencies and problems of the existing technology, the present invention provides a burner that facilitates the discharge of waste gas.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A burner includes a base, a flow guide seat, and a fire cover that are sequentially arranged together from bottom to top. The fire cover includes an inner fire cover and an outer fire cover. The outer fire cover surrounds the inner fire cover. An exhaust gas port is provided on the flow guide seat. The exhaust gas port is located between the inner fire cover and the outer fire cover. An exhaust gas gap is formed between the flow guide seat and the base, and the exhaust gas gap communicates with the exhaust gas port.

[0008] Preferably, at least three stepped portions are formed at the upper end of the base, and a counterbore is provided on the flow guide seat. Three or more stepped portions are inserted into the counterbore.

[0009] Preferably, the thickness of the exhaust gas gap is between 3 - 10 mm.

[0010] Preferably, a first gas channel and a second gas channel are formed on the base. A first nozzle is connected to the first gas channel, and a second nozzle is connected to the second gas channel. A first gas mixing hole is formed on the flow guide seat. The inner fire cover and the first nozzle are respectively connected to two ends of the first gas mixing hole. A second gas mixing hole is further formed on the flow guide seat. The second gas mixing hole is located outside the first gas mixing hole. The second nozzle is connected to one end of the second gas mixing hole. A diffusion groove and an air port are further formed on the flow guide seat. The other end of the second gas mixing hole is connected to the diffusion groove. The outer fire cover is arranged on the diffusion groove. External air can flow to the first nozzle and the second nozzle through the air port. The diffusion groove and the air port are located on the same circumferential direction centered on the first gas mixing hole.

[0011] Preferably, there are at least two second nozzles. The second gas mixing holes and the diffusion grooves respectively correspond to the second nozzles one by one. Two or more diffusion grooves are connected end to end.

[0012] Preferably, a flow guiding surface is formed on the inner bottom of the diffusion groove. The overall structure of the flow guiding surface is spiral. The flow guiding surface surrounds the outside of the first gas mixing hole. The lower end of the flow guiding surface is connected to the second gas mixing hole.

[0013] Preferably, the first gas channel has a first air outlet section and a first air inlet section connected together. The first nozzle is connected to the first air outlet section. The second gas channel has a second air inlet section and two air outlet sections. The two second air outlet sections are respectively connected to the second air inlet section. The second nozzle is connected to the second air outlet section. The first air inlet section and the second air inlet section are stacked together. The first air inlet section and the second air inlet section are respectively machined at one time by a drill bit.

[0014] Preferably, a first protrusion and a second protrusion are formed at the lower end of the base body. The thickness of the first protrusion is less than that of the second protrusion. The first protrusion and the second protrusion intersect. The first air inlet section is formed on the first protrusion, and the second air inlet section is formed on the second protrusion.

[0015] Preferably, a third protrusion and two fourth protrusions are formed at the upper end of the base. The first air outlet section is formed on the third protrusion. The outer end of the first air outlet section is located at the upper end of the third protrusion. The two second air outlet sections are respectively formed on the two fourth protrusions. The outer end of the second air outlet section is located at the upper end of the fourth protrusion.

[0016] Preferably, the second air outlet section includes a second straight hole section and a second side hole section. The second side hole section, the second straight hole section and the second air inlet section are connected in sequence. The outer end of the second side hole section faces one side of the base. The second nozzle is connected to the outer end of the second side hole section. The second straight hole section and the second side hole section are respectively machined at one time by a drill bit.

[0017] The prominent and beneficial technical effects of the present invention compared with the prior art are as follows:

[0018] (1) When using this burner, the fuel burns on the outer fire cover and the inner fire cover to generate waste gas (mainly carbon dioxide). Since the density of the waste gas is relatively large, the waste gas can automatically sink under its own weight. The waste gas is discharged outward through the waste gas port and the waste gas gap in sequence, avoiding the retention of the waste gas near the outer fire cover and the inner fire cover. Therefore, this burner has the advantages of convenient waste gas discharge, high thermal efficiency, and reasonable structural design.

[0019] (2) The diffusion groove and the air port are located on the same circumferential direction centered on the first mixing air hole, and the diffusion groove and the air port are located at the same height position, thereby reducing the overall height of the mixing burner. Compared with the prior art, the height can be reduced by 15 - 20 mm. Therefore, this mixing burner has the advantages of compact structure, reduced product height, and small occupied space.

[0020] (3) The first air inlet hole section and the second air inlet hole section are stacked on top of each other, making the overall structure more compact and reducing the occupied space. The first air inlet hole section and the second air inlet hole section are respectively processed by a drill bit at one time. Compared with the prior art, the number of processes is reduced, and the processing cost is lowered. Moreover, the inner surfaces of the first air inlet hole section and the second air inlet hole section processed by drilling are smooth and have a small resistance when the gas passes through, improving the smoothness of gas transmission. Therefore, this burner has the advantages of simple structure, low processing cost, and small occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structure schematic diagram of the present invention;

[0022] Figure 2 is an exploded structure schematic diagram of the present invention;

[0023] Figure 3 is a structure schematic diagram of the base of the present invention;

[0024] Figure 4 is one of the sectional structure schematic diagrams of the base of the present invention;

[0025] Figure 5 is one of the sectional structure schematic diagrams of the base of the present invention;

[0026] Figure 6 is a structure schematic diagram of the flow guide seat of the present invention;

[0027] In the figure: 1 - base, 2 - flow - guiding seat, 3 - inner burner cap, 4 - outer burner cap, 5 - first nozzle, 6 - second nozzle, 7 - igniter, 8 - thermocouple, 9 - exhaust gas gap, 11 - first air - intake hole section, 12 - first air - outlet hole section, 13 - second air - intake hole section, 14 - second straight hole section, 15 - second side hole section, 16 - first protrusion, 17 - second protrusion, 18 - third protrusion, 19 - fourth protrusion, 20 - step portion, 21 - first mixing air hole, 22 - second mixing air hole, 23 - diffusion groove, 24 - air port, 25 - exhaust gas port, 26 - counterbore, 231 - flow - guiding surface. Detailed implementation mode

[0028] For the convenience of those skilled in the art to understand, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] As Figures 1 to 6 shown, a burner includes a base 1, a flow - guiding seat 2 and a burner cap which are arranged together in sequence from bottom to top. The burner cap includes an inner burner cap 3 and an outer burner cap 4. The overall structures of the inner burner cap 3 and the outer burner cap 4 are both in a circular shape. The inner burner cap 3 and the outer burner cap 4 are respectively arranged at the upper end of the flow - guiding seat 2, and the outer burner cap 4 surrounds the outer side of the inner burner cap 3.

[0030] The base 1 can be cast from cast iron. The base 1 is provided with a first gas channel and a second gas channel. The first gas channel and the second gas channel are independent of each other. The first gas channel is used to introduce gas onto the inner burner cap 3 of the gas stove, and the second gas channel is used to introduce gas onto the outer burner cap 4 of the gas stove. A first nozzle 5 is connected to the first gas channel, and a second nozzle 6 is connected to the second gas channel. The external gas pipeline can be connected to the first gas channel and the second gas channel, and the gas can be sprayed out through the first nozzle 5 and the second nozzle 6 respectively.

[0031] The flow - guiding seat 2 is provided with a first mixing air hole 21. The axial direction of the first mixing air hole 21 is consistent with the vertical direction. The inner burner cap 3 and the first nozzle 5 are respectively connected to the upper and lower ends of the first mixing air hole 21. The inner burner cap 3 covers the upper end of the first mixing air hole 21, and the first nozzle 5 faces the lower end of the first mixing air hole 21. The first mixing air hole 21 plays a role in diffusing, reducing the flow rate, increasing the static pressure and homogenizing the mixed gas of air and gas, so as to form a uniform, continuous and stable flame on the inner burner cap 3.

[0032] The flow - guiding seat 2 is also provided with a second mixing air hole 22. The second mixing air hole 22 is horizontally arranged on the flow - guiding seat 2. The second mixing air hole 22 is located outside the first mixing air hole 21. The second nozzle 6 is connected to one end of the second mixing air hole 22. The first mixing air hole 21 also plays a role in diffusing, reducing the flow rate, increasing the static pressure and homogenizing the mixed gas of air and gas.

[0033] The diversion seat 2 is also provided with a diffusion groove 23 and an air port 24. The air port 24 is located on the side surface of the diversion seat 2. The opening of the diffusion groove 23 faces upward. The other end of the second mixing air hole 22 is connected to the diffusion groove 23. The mixed gas in the second mixing air hole 22 can enter the diffusion groove 23 for diffusion. The outer fire cap 4 is covered on the diffusion groove 23. The diffused mixed gas in the diffusion groove 23 flows outwards through the outer fire cap 4, so as to form a flame on the outer fire cap 4.

[0034] External air can flow through the air port 24 to the first nozzle 5 and the second nozzle 6. The design of the air port 24 has the effect of facilitating air circulation. External air can be timely supplemented to the first nozzle 5 and the second nozzle 6 through the air port 24, making the fuel burn more fully and improving the thermal efficiency of the fuel.

[0035] The diffusion groove 23 and the air port 24 are located on the same circumferential direction centered on the first mixing air hole 21, and the diffusion groove 23 and the air port 24 are located at the same height position, thereby reducing the overall height of the mixing burner. Compared with the prior art, the height can be reduced by 15 - 20 mm. Therefore, this mixing burner has the advantages of compact structure, reduced product height and small occupied space.

[0036] The first mixing air hole 21, the second mixing air hole 22, the diffusion groove 23 and the air port 24 are also located at the same height position, thereby further reducing the height of the product and improving the structural compactness.

[0037] The diversion seat 2 is also provided with an exhaust port 25. The exhaust port 25 faces the base 1. The exhaust port 25 is located between the inner fire cap 3 and the outer fire cap 4. The inner fire cap 3 and the outer fire cap 4 are located at the same height position, while the upper end of the exhaust port 25 is lower than the positions of the inner fire cap 3 and the outer fire cap 4. An exhaust gas gap 9 is formed between the diversion seat 2 and the base 1. The exhaust gas gap 9 is located below the exhaust port 25, and the exhaust gas gap 9 communicates with the exhaust port 25.

[0038] When using this burner, the fuel burns on the outer fire cap 4 and the inner fire cap 3 to generate exhaust gas (mainly carbon dioxide). Due to the relatively large density of the exhaust gas, the exhaust gas can sink automatically. The exhaust gas is discharged outwards through the exhaust port 25 and the exhaust gas gap 9 in sequence, avoiding the exhaust gas staying near the outer fire cap 4 and the inner fire cap 3. Therefore, this burner has the advantages of convenient exhaust gas discharge, high thermal efficiency and reasonable structural design.

[0039] The outer contour of the exhaust gas gap 9 is annular, and the outer contour of the exhaust gas gap 9 is consistent with the outer contour of the diversion seat 2. The exhaust gas can be discharged outwards in all directions, improving the exhaust efficiency.

[0040] At least three stepped portions 20 are formed at the upper end of the base 1. A countersunk head groove 26 is formed on the flow guide base 2. Three or more stepped portions 20 are inserted into the countersunk head groove 26. The flow guide base 2 is erected above the base 1, thereby forming a gap between the base 1 and the flow guide base 2.

[0041] The three or more stepped portions 20 are in the same circumferential direction. The cross-section of the countersunk head groove 26 is circular. The flow guide base 2 can rotate on the base 1, which is convenient for the second nozzle 6 to align with the second gas mixing hole 22 and is convenient for the assembly between the flow guide base 2 and the base 1.

[0042] The thickness of the exhaust gas gap 9 is between 3 - 10 mm. The exhaust gas gap 9 of this size ensures the exhaust gas discharge efficiency on the one hand and avoids impurities entering the interiors of the flow guide base 2 and the base 1 through the exhaust gas gap 9 due to the excessive exhaust gas gap 9 on the other hand.

[0043] There are two second nozzles 6. The second gas mixing holes 22 and the diffusion grooves 23 respectively correspond to the second nozzles 6. The second nozzles 6 are respectively connected to the two second gas mixing holes 22. The two second gas mixing holes 22 are respectively connected to the two diffusion grooves 23. The two diffusion grooves 23 are connected end to end. The two diffusion grooves 23 form a closed loop. The mixed gas can diffuse within the closed loop formed by the two diffusion grooves 23. The mixed gas can flow out in all directions on the outer fire cover 4, thereby forming a uniform annular flame in the circumferential direction of the outer fire cover 4. Thus, the flame on the outer fire cover 4 can heat the cookware in all directions, avoiding the problem of local overheating.

[0044] Air ports 24 are formed between adjacent diffusion grooves 23. The air ports 24 and the diffusion grooves 23 are effectively combined, which not only ensures the efficient flow of air to the first nozzle 5 and the second nozzle 6 but also ensures the efficient diffusion of the mixed gas below the outer fire cover 4.

[0045] A flow guide surface 231 is formed on the inner bottom of the diffusion groove 23. The overall structure of the flow guide surface 231 is spiral. The flow guide surface 231 surrounds the outside of the first gas mixing hole 21. The lower end of the flow guide surface 231 is connected to the second gas mixing hole 22. Under the guidance of the flow guide surface 231, the mixed gas diffuses along the length direction of the diffusion groove 23. Thus, the mixed gas diffuses to the circumferential direction of the outer fire cover 4. The inclined flow guide surface 231 has the effect of reducing the flow rate of the mixed gas and increasing the static pressure, further improving the thermal efficiency. And the spiral directions of the two flow guide surfaces 231 are the same, thereby forming a swirling fire on the outer fire cover 4, increasing the heating area, having a faster heating speed, and burning more completely.

[0046] The first gas passage has a first gas outlet section 12 and a first gas inlet section 11 connected together. The first gas outlet section 12 is vertically arranged on the base 1, and the first gas inlet section 11 is horizontally arranged on the base 1. The outer end of the first gas inlet section 11 is used to connect gas fuels such as liquefied petroleum gas, artificial coal gas, and natural gas. The first nozzle 5 is connected to the outer end of the first gas outlet section 12.

[0047] The second gas passage has a second gas inlet section 13 and two gas outlet sections. The two second gas outlet sections are respectively connected to the second gas inlet section 13. The two second nozzles 6 are respectively connected to the outer ends of the two second gas outlet sections. The two gas outlet sections are respectively arranged on both sides of the first gas outlet section 12, and the two gas outlet sections are symmetric with each other with the first gas outlet section 12 as the center.

[0048] The first gas inlet section 11 is located above the second gas inlet section 13. The first gas inlet section 11 and the second gas inlet section 13 are stacked together, making the overall structure more compact, reducing the occupied space. The first gas inlet section 11 and the second gas inlet section 13 are respectively machined in one go with a drill bit. Compared with the prior art, the number of processes is reduced, and the processing cost is lowered. Moreover, the inner surfaces of the first gas inlet section 11 and the second gas inlet section 13 formed by drilling are smooth and have a small resistance when the gas passes through, improving the smoothness of gas transmission. Therefore, this burner has the advantages of a simple structure, low processing cost, and small occupied space.

[0049] At the lower end of the base 1 body, a first protrusion 16 and a second protrusion 17 are formed. The thickness of the first protrusion 16 is less than the thickness of the second protrusion 17. The first protrusion 16 and the second protrusion 17 respectively protrude below the base 1. The first protrusion 16 and the second protrusion 17 are both horizontally arranged at the lower end of the base 1, and the first protrusion 16 and the second protrusion 17 intersect. The first gas inlet section 11 is opened on the first protrusion 16, and the second gas inlet section 13 is opened on the second protrusion 17. The shape design of the first protrusion 16 and the second protrusion 17 reduces the material used for the base 1, lightens the weight of the base 1, and realizes the lightweight of the product.

[0050] A third protrusion 18 and two fourth protrusions 19 are formed at the upper end of the base 1. The third protrusion 18 and the fourth protrusions 19 protrude above the base 1 respectively. The first air outlet section 12 is provided on the third protrusion 18, and the outer end of the first air outlet section 12 is located at the upper end of the third protrusion 18. Two second air outlet sections are respectively provided on the two fourth protrusions 19, and the outer ends of the second air outlet sections are located at the upper ends of the fourth protrusions 19. The designs of the third protrusion 18 and the fourth protrusions 19 serve to raise the heights of the outer ends of the first air outlet section 12 and the second air outlet sections. When using this burner, oil stains, water stains, etc. will accumulate on the upper end of the base 1, and the design of the elevation structure prevents oil stains, water stains, etc. from entering the first air outlet section 12 and the second air outlet sections.

[0051] The second air outlet section includes a second side hole section 15 and a second straight hole section 14. The second side hole section 15 is horizontally provided on the base 1, and the second straight hole section 14 is vertically provided on the base 1. The second side hole section 15, the second straight hole section 14, and the second air inlet section 13 are sequentially connected together. The outer end of the second side hole section 15 faces one side of the base 1, and the second nozzle 6 is connected to the outer end of the second side hole section 15. The second nozzle 6 also faces one side of the base 1, so that a flame in the rotational direction can be formed on the outer burner cap 4, increasing the combustion area of the gas and making the combustion more complete.

[0052] The first air outlet section 12, the second straight hole section 14, and the second side hole section 15 are respectively processed by a drill bit at one time. The first gas channel is processed by three drilling procedures, and the second gas channel is processed by five drilling procedures. The processing procedures are streamlined, further reducing the processing costs of the first gas channel and the second gas channel.

[0053] An igniter 7 and a thermocouple 8 are respectively installed on the base 1. The igniter 7 is used to ignite the fuel, and the thermocouple 8 is used to play a role in flameout protection.

[0054] The above embodiments are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A burner, comprising a base (1), a flow guide base (2) and a burner cap arranged together in sequence from bottom to top. The burner cap includes an inner burner cap (3) and an outer burner cap (4), and the outer burner cap (4) surrounds the inner burner cap (3). Characterized in that an exhaust gas port (25) is formed on the flow guide base (2), the exhaust gas port (25) is located between the inner burner cap (3) and the outer burner cap (4), an exhaust gas gap (9) is formed between the flow guide base (2) and the base (1), the exhaust gas gap (9) communicates with the exhaust gas port (25), the inner burner cap (3) and the outer burner cap (4) are respectively arranged at the upper end of the flow guide base (2), the exhaust gas port (25) faces the base (1), and the exhaust gas gap (9) is located below the exhaust gas port (25); at least three stepped portions (20) are formed at the upper end of the base (1), a countersunk head groove (26) is formed on the flow guide base (2), and three or more stepped portions (20) are inserted into the countersunk head groove (26); a first gas channel and a second gas channel are formed on the base (1), a first nozzle (5) is connected to the first gas channel, a second nozzle (6) is connected to the second gas channel, a first gas mixing hole (21) is formed on the flow guide base (2), the inner burner cap (3) and the first nozzle (5) are respectively connected to two ends of the first gas mixing hole (21), a second gas mixing hole (22) is further formed on the flow guide base (2), the second gas mixing hole (22) is located outside the first gas mixing hole (21), the second nozzle (6) is connected to one end of the second gas mixing hole (22), a diffusion groove (23) and an air port (24) are further formed on the flow guide base (2), the other end of the second gas mixing hole (22) is connected to the diffusion groove (23), the outer burner cap (4) covers the diffusion groove (23), and external air can flow to the first nozzle (5) and the second nozzle (6) through the air port (24), and the diffusion groove (23) and the air port (24) are located on the same circumferential direction centered on the first gas mixing hole (21).

2. A burner according to claim 1 Characterized in that the thickness of the exhaust gas gap (9) is between 3 and 10 mm.

3. A burner according to claim 1 Characterized in that a flow guiding surface (231) is formed on the inner bottom of the diffusion groove (23), the overall structure of the flow guiding surface (231) is spiral, the flow guiding surface (231) surrounds the outside of the first gas mixing hole (21), and the lower end of the flow guiding surface (231) is connected to the second gas mixing hole (22).

4. A burner according to claim 3 Characterized in that the first gas channel has a first gas outlet hole section (12) and a first gas inlet hole section (11) connected together, the first nozzle (5) is connected to the first gas outlet hole section (12), the second gas channel has a second gas inlet hole section (13) and two gas outlet hole sections, the two second gas outlet hole sections are respectively connected to the second gas inlet hole section (13), the second nozzle (6) is connected to the second gas outlet hole section, the first gas inlet hole section (11) and the second gas inlet hole section (13) are stacked together, and the first gas inlet hole section (11) and the second gas inlet hole section (13) are respectively processed by a drill bit at one time.

5. A burner according to claim 4, characterized in that, a first protrusion (16) and a second protrusion (17) are formed at the lower end of the base (1) body, the thickness of the first protrusion (16) is less than the thickness of the second protrusion (17), the first protrusion (16) and the second protrusion (17) intersect with each other, the first air inlet hole section (11) is opened on the first protrusion (16), and the second air inlet hole section (13) is opened on the second protrusion (17).

6. A burner according to claim 4 or 5, characterized in that, the second air outlet hole section includes a second straight hole section (14) and a second side hole section (15), the second side hole section (15), the second straight hole section (14) and the second air inlet hole section (13) are connected in sequence, the outer end of the second side hole section (15) faces one side of the base (1), the second nozzle (6) is connected to the outer end of the second side hole section (15), and the second straight hole section (14) and the second side hole section (15) are respectively machined in one time by a drill bit.

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