Combustor fire cover, combustor and gas stove comprising combustor fire cover

Abstract

The utility model provides a burner fire cover, burner and gas stove including the burner fire cover, the burner fire cover comprises an inner ring fire cover and a cap, the side wall of the inner ring base is provided with a plurality of main fire holes, the cap is covered on the top of the inner ring base, the bottom wall of the cap extends downwards to form a first ring wall, the first ring wall is provided with a plurality of main fire holes, and the second ring wall is provided with a plurality of main fire holes. The first ring wall is located on the inner side of the side wall of the inner ring base, first air outlet channels arranged in the circumferential direction of the first ring wall are formed in the first ring wall, and the opening area of the first air outlet channels in the inner wall face of the first ring wall is smaller than the opening area of the first air outlet channels in the outer wall face of the first ring wall. The inner side opening area of the first gas outlet channel is smaller than the outer side opening area of the first gas outlet channel, so that gas is expanded when passing through the first gas outlet channel, the gas speed is reduced, the flame stabilizing performance is improved, and the problem that gas leaves flame due to the fact that the gas flow speed is too high can be solved.

Description

Technical Field

[0001] The utility model relates to a burner fire cover, a burner and a gas stove comprising the same. Background Art

[0002] In the prior art, the gas is introduced from the bottom of the inner ring fire cover, and the gas after entering the inner ring fire cover flows out from the fire hole for combustion. When the burner load needs to be increased, the gas valve opening is generally increased, which will cause the gas flow rate entering the inner ring fire cover to be too high, and the gas flow rate through the fire hole to be too fast, which is easy to reduce the flame stability and thermal efficiency of the stove during operation, and also easily cause the problem of gas flame separation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defect in the prior art that the gas flowing out of the fire hole of the inner ring fire cover is too fast, which easily reduces the flame stability and thermal efficiency of the stove during operation and easily causes the gas flame to separate, and provides a burner fire cover, a burner and a gas stove containing the same.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The utility model provides a burner fire cover, the burner fire cover comprising:

[0006] An inner ring base, wherein a plurality of main fire holes are provided on the side wall of the inner ring base;

[0007] A cap cover is arranged on the top of the inner ring base, and a first ring wall is extended downward from the bottom wall of the cap cover, and the first ring wall is located on the inner side of the side wall of the inner ring base. A first air outlet channel is opened on the first ring wall and arranged along the circumference of the first ring wall, and the opening area of ​​the first air outlet channel on the inner wall surface of the first ring wall is smaller than the opening area on the outer wall surface of the first ring wall.

[0008] In the present embodiment, the above-mentioned structural form is adopted, and at least part of the gas passes through the first gas outlet channel in the first ring wall, and then flows out from the main fire hole opened on the inner ring base for combustion, wherein the inner opening area of ​​the first gas outlet channel is smaller than the outer opening area thereof, so that the gas expands when passing through the first gas outlet channel, thereby reducing the gas velocity and improving the flame stabilization performance, thereby solving the problem of gas flame separation caused by excessive gas flow rate; it also enables the gas to be fully burned, thereby improving the thermal efficiency of the gas.

[0009] Preferably, along the axial direction of the first ring wall, at least two circles of the first air outlet channels are arranged on the first ring wall.

[0010] In the present solution, the above-mentioned structural form is adopted, and by providing multiple rows of first gas outlet channels, the gas velocity can be further reduced, thereby achieving the effect of enhancing flame stabilization and ensuring the stability of combustion.

[0011] Preferably, along the axial direction of the first annular wall, the opening area of ​​the first air outlet channel on the inner wall surface of the first annular wall gradually increases from bottom to top.

[0012] In this solution, the above-mentioned structural form is adopted. As the gas flows upward, the inner opening area of ​​the first gas outlet channel is gradually increased to ensure that the gas outlet pressures of multiple first gas outlet channels along the axis of the first ring wall are approximately the same, thereby improving the stability of gas outflow.

[0013] Preferably, the outer wall surface of the first annular wall is provided with a circumferentially spirally encircling groove, the groove having two opposite side walls, the side walls of the two grooves being away from each other in a direction away from the inner wall surface of the first annular wall, and the opening of the first air outlet channel on the outer wall surface of the first annular wall is located in the groove.

[0014] In this solution, the above-mentioned structural form is adopted, and an expansion section is formed at the outlet section of the first gas outlet channel, so that the pressure of the gas is reduced when it flows out through the first gas outlet channel, thereby reducing the gas flow speed. The groove adopts a spirally surrounded structure, which is not only easy to process, but also can guide and drain the outflowing gas, so that the gas is more evenly distributed in the space after flowing out of the inner cavity of the first ring wall.

[0015] Preferably, the burner fire cover also includes a second ring wall, the first ring wall is located on the inner side of the second ring wall, the second ring wall is located on the inner side of the side wall of the inner ring base, and the second ring wall is provided with a second air outlet channel arranged along the circumference of the second ring wall.

[0016] In the present scheme, the above-mentioned structural form is adopted, the second ring wall is arranged on the outside of the first ring wall, and is located on the inner side of the side wall of the inner ring base. At least part of the gas passes through the first gas outlet channel and the second gas outlet channel in sequence, and then flows out from the main fire hole opened on the inner ring base for combustion. The spatial layout is reasonable.

[0017] Preferably, the second air outlet passage comprises a first air outlet section and a second air outlet section which are interconnected, the second air outlet section is located outside the first air outlet section, and the channel cross-sectional area of ​​the second air outlet section is larger than the channel cross-sectional area of ​​the first air outlet section;

[0018] And / or, along the axial direction of the second ring wall, at least two circles of the second air outlet channels are arranged on the second ring wall.

[0019] In this solution, the above structure is adopted, and the gas flow rate drops significantly after flowing from the first gas outlet section into the second gas outlet section, further reducing the gas flow rate, thereby achieving the effect of enhancing flame stabilization. By opening a multi-layer second gas outlet channel, the gas outlet area is increased, the firepower is enhanced, and at the same time, the situation of flame separation caused by increased pressure in the inner cavity of the fire cover due to poor gas outflow is avoided.

[0020] Preferably, a first brim is extended downward from the outer edge of the cap, and the first brim ring is arranged on the outer peripheral side of the inner ring base.

[0021] In the present scheme, the above-mentioned structural form is adopted, and external overflow is easy to drip onto the burner fire cover. By setting a first brim on the cap, the main fire hole on the inner ring base can be covered and protected, and the overflow can drip directly from the bottom of the first brim, avoiding the overflow from blocking the main fire hole, thereby avoiding reducing the combustion efficiency of the burner.

[0022] Preferably, the hat cover further comprises a second brim, wherein the second brim is located on the inner side of the first brim, and the second brim ring is arranged on the outer peripheral side of the inner ring base.

[0023] In this solution, the above-mentioned structural form is adopted, and the combination of the first brim and the second brim can play a double-layer overflow diversion role, allowing the top overflow to flow along the bottom of the first brim and the second brim, and will not flow into the main fire hole, further avoiding blockage of the fire hole.

[0024] The utility model provides a burner, which comprises the burner fire cover as described above.

[0025] The utility model provides a gas stove, which comprises the burner as described above.

[0026] The positive and progressive effects of the utility model are:

[0027] The inner opening area of ​​the first gas outlet channel in the utility model is smaller than the outer opening area thereof, so that the gas expands when passing through the first gas outlet channel, thereby reducing the gas velocity and improving the flame stabilization performance, thereby solving the problem of gas flame separation caused by excessively fast gas flow velocity; it also enables the gas to be fully burned, thereby improving the thermal efficiency of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a burner fire cover according to a preferred embodiment of the utility model.

[0029] Figure 2 It is a schematic structural diagram of the inner ring base of a preferred embodiment of the utility model.

[0030] Figure 3 It is a cross-sectional view of the inner ring base of a preferred embodiment of the utility model.

[0031] Figure 4 It is a schematic structural diagram of a cap according to a preferred embodiment of the utility model.

[0032] Figure 5 It is a partial structural schematic diagram of the first ring wall of a preferred embodiment of the utility model.

[0033] Figure 6 It is a schematic structural diagram of the second ring wall of a preferred embodiment of the utility model.

[0034] Figure 7 This is a schematic structural diagram of a burner according to a preferred embodiment of the utility model.

[0035] Description of reference numerals:

[0036] Burner fire cover 1

[0037] Inner ring base 11

[0038] Side wall 111

[0039] Main fire hole 1111

[0040] Flame stabilizing hole 1112

[0041] Cap 12

[0042] First ring wall 121

[0043] First air outlet channel 1211

[0044] Groove 1212

[0045] Side wall 12121

[0046] Second ring wall 122

[0047] Second air outlet channel 1221

[0048] First outlet section 12211

[0049] Second outlet section 12212

[0050] First brim 123

[0051] Second brim 124

[0052] Burner 2 DETAILED DESCRIPTION

[0053] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the following embodiments.

[0054] Please combine Figures 1 to 6For understanding, the embodiment of the utility model provides a burner fire cover 1, which includes an inner ring base 11 and a cap 12, a plurality of main fire holes 1111 are provided on the side wall 111 of the inner ring base 11, the cap 12 is provided on the top of the inner ring base 11, a first ring wall 121 is extended downward from the bottom wall of the cap 12, the first ring wall 121 is located on the inner side of the side wall 111 of the inner ring base 11, a first gas outlet channel 1211 arranged along the circumference of the first ring wall 121 is provided on the first ring wall 121, and the opening area of ​​the first gas outlet channel 1211 on the inner wall surface of the first ring wall 121 is smaller than the opening area on the outer wall surface of the first ring wall 121. At least part of the gas passes through the first gas outlet channel 1211 in the first ring wall 121, and then flows out from the main fire hole 1111 provided on the inner ring base 11 for combustion. The inner opening area of ​​the first gas outlet channel 1211 is smaller than the outer opening area thereof, so that the gas expands when passing through the first gas outlet channel 1211, thereby reducing the gas velocity and improving the flame stabilization performance, thereby solving the problem of gas flame separation caused by excessively fast gas flow rate; it also enables the gas to be fully burned, thereby improving the thermal efficiency of the gas.

[0055] In this embodiment, if Figures 1 to 3 As shown, the main fire holes 1111 are evenly distributed along the circumference of the side wall 111. The side wall 111 of the inner ring base 11 is also provided with a flame stabilizing hole 1112, which is arranged between two adjacent main fire holes 1111. The flame stabilizing hole 1112 can improve the stability of the gas flowing out of the burner fire cover, so that the burner fire cover has better flame stability.

[0056] In this embodiment, if Figure 4 As shown, along the axial direction of the first annular wall 121, at least two circles of first gas outlet channels 1211 are arranged on the first annular wall 121. By providing multiple rows of first gas outlet channels 1211, the gas velocity can be further reduced, the flame stabilization effect can be enhanced, and the combustion stability can be ensured.

[0057] For example, along the axial direction of the first annular wall 121, 5 circles of first air outlet channels 1211 are evenly arranged on the first annular wall 121; along the circumference of the first annular wall 121, 8 evenly distributed first air outlet channels 1211 serve as one circle of first air outlet channels 1211. It should be noted that the number of first air outlet channels 1211 can be selected according to actual needs and is not limited here.

[0058] In this embodiment, if Figure 4As shown, along the axis direction of the first annular wall 121, the opening area of ​​the first gas outlet channel 1211 on the inner wall surface of the first annular wall 121 gradually increases from bottom to top. As the gas flows upward, the inner opening area of ​​the first gas outlet channel 1211 is gradually increased to ensure that the gas outlet pressures of the multiple first gas outlet channels 1211 along the axis direction of the first annular wall 121 are approximately the same, thereby improving the stability of gas outflow.

[0059] In this embodiment, if Figure 5 As shown, the outer wall surface of the first annular wall 121 is provided with a circumferential spiral groove 1212, and the groove 1212 has two opposite side walls 12121. The side walls 12121 of the two grooves 1212 are away from each other in the direction away from the inner wall surface of the first annular wall 121, and the opening of the first gas outlet channel 1211 on the outer wall surface of the first annular wall 121 is located in the groove 1212. With such a design, by forming an expansion section at the outlet section of the first gas outlet channel 1211, the pressure of the gas is reduced when it flows out through the first gas outlet channel 1211, so as to reduce the gas flow speed. The groove 1212 adopts a spiral structure, which is not only easy to process, but also can guide and drain the outflowing gas, so that the gas is more evenly distributed in the space after flowing out of the inner cavity of the first annular wall 121.

[0060] For example, the cross section of the groove 1212 is a triangle, and the angle between the two sidewalls 12121 is set to 30°. Here, the cross-sectional shape of the groove 1212 is not specifically limited, as long as the two sidewalls 12121 in the groove 1212 are configured to move away from each other in a direction away from the inner wall surface of the first annular wall 121, so that the outlet section of the first outlet channel 1211 forms an expansion section. The first outlet channel 1211 is horizontally arranged.

[0061] In another embodiment, the first annular wall 121 is directly composed of a spiral scanning surface with an isosceles triangle cross-section. The opening of the first air outlet channel 1211 on the inner wall surface of the first annular wall 121 is located at the boundary line of the spiral surface. The first air outlet channel 1211 is horizontally arranged, and the opening on the inner wall surface is circular.

[0062] In this embodiment, if Figure 4 and Figure 6As shown, the burner fire cover 1 also includes a second annular wall 122, the first annular wall 121 is located on the inner side of the second annular wall 122, the second annular wall 122 is located on the inner side of the side wall 111 of the inner ring base 11, and the second annular wall 122 is provided with a second gas outlet channel 1221 arranged along the circumference of the second annular wall 122. The second annular wall 122 is arranged on the outer side of the first annular wall 121 and is located on the inner side of the side wall 111 of the inner ring base 11, at least part of the gas passes through the first gas outlet channel 1211 and the second gas outlet channel 1221 in sequence, and then flows out from the main fire hole 1111 opened on the inner ring base 11 for combustion, and the spatial layout is reasonable.

[0063] In some embodiments, Figure 6 As shown, the second gas outlet channel 1221 includes a first gas outlet section 12211 and a second gas outlet section 12212 which are interconnected. The second gas outlet section 12212 is located outside the first gas outlet section 12211, and the channel cross-sectional area of ​​the second gas outlet section 12212 is greater than the channel cross-sectional area of ​​the first gas outlet section 12211. After the gas flows from the first gas outlet section 12211 into the second gas outlet section 12212, the flow rate drops significantly, further reducing the gas flow rate, thereby achieving the effect of enhancing flame stabilization. Along the axial direction of the second annular wall 122, at least two circles of second gas outlet channels 1221 are arranged on the second annular wall 122. By providing multiple layers of the second gas outlet channel 1221, the gas outlet area is increased, the firepower is enhanced, and at the same time, the situation of flame separation caused by the increase of pressure in the inner cavity of the fire cover due to poor gas outflow is avoided. For example, along the axial direction of the second annular wall 122, 5 circles of second air outlet channels 1221 are evenly arranged on the second annular wall 122; along the circumference of the second annular wall 122, 8 evenly distributed second air outlet channels 1221 serve as one circle of second air outlet channels 1221. It should be noted that the number of second air outlet channels 1221 can be selected according to actual needs and is not limited here.

[0064] Specifically, the second air outlet channel 1221 is horizontally arranged. Of course, in other embodiments, the second air outlet channel 1221 can also be inclined.

[0065] In this embodiment, if Figure 4 As shown, the outer edge of the cap 12 extends downward with a first brim 123, and the first brim 123 is arranged around the outer peripheral side of the inner ring base 11. External overflow is easy to drip onto the burner fire cover 1. By arranging the first brim 123 on the cap 12, the main fire hole 1111 on the inner ring base 11 can be covered and protected, and the overflow can drip directly from the bottom of the first brim 123, so as to avoid the overflow blocking the main fire hole 1111, thereby avoiding reducing the combustion efficiency of the burner.

[0066] In this embodiment, if Figure 4As shown, the cap 12 further includes a second brim 124, which is located inside the first brim 123 and is arranged around the outer periphery of the inner ring base 11. The combination of the first brim 123 and the second brim 124 can play a double-layer overflow diversion role, allowing the top overflow to flow along the bottom of the first brim 123 and the second brim 124 without flowing into the main fire hole 1111, further avoiding clogging the fire hole.

[0067] like Figure 7 As shown, the embodiment of the utility model further provides a burner 2, and the burner 2 includes the burner fire cover 1 as above.

[0068] The embodiment of the utility model further provides a gas stove, which includes the burner 2 as described above.

[0069] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A burner fire cover, characterized in that: The burner fire cover comprises: An inner ring base, wherein a plurality of main fire holes are provided on the side wall of the inner ring base; A cap cover is arranged on the top of the inner ring base, and a first ring wall is extended downward from the bottom wall of the cap cover, and the first ring wall is located on the inner side of the side wall of the inner ring base. A first air outlet channel is opened on the first ring wall and arranged along the circumference of the first ring wall, and the opening area of ​​the first air outlet channel on the inner wall surface of the first ring wall is smaller than the opening area on the outer wall surface of the first ring wall.

2. The burner cap according to claim 1, characterized in that: At least two circles of the first air outlet channels are arranged on the first ring wall along the axial direction of the first ring wall.

3. The burner cap according to claim 2, characterized in that: Along the axial direction of the first ring wall, the opening area of ​​the first air outlet channel on the inner wall surface of the first ring wall gradually increases from bottom to top.

4. The burner cap according to claim 1, characterized in that: The outer wall surface of the first annular wall is provided with a circumferentially spirally encircling groove, and the groove has two opposite side walls. The side walls of the two grooves are away from each other in a direction away from the inner wall surface of the first annular wall, and the opening of the first air outlet channel on the outer wall surface of the first annular wall is located in the groove.

5. The burner cap according to claim 1, characterized in that: The burner fire cover also includes a second ring wall, the first ring wall is located on the inner side of the second ring wall, the second ring wall is located on the inner side of the side wall of the inner ring base, and the second ring wall is provided with a second air outlet channel arranged along the circumference of the second ring wall.

6. The burner cap according to claim 5, characterized in that: The second air outlet channel comprises a first air outlet section and a second air outlet section which are interconnected, the second air outlet section is located outside the first air outlet section, and the channel cross-sectional area of ​​the second air outlet section is larger than the channel cross-sectional area of ​​the first air outlet section; And / or, along the axial direction of the second ring wall, at least two circles of the second air outlet channels are arranged on the second ring wall.

7. The burner cap according to claim 1, characterized in that: A first brim is extended downward from the outer edge of the cap, and the first brim ring is arranged on the outer peripheral side of the inner ring base.

8. The burner cap according to claim 7, characterized in that: The cap also includes a second brim, which is located on the inner side of the first brim and is ring-arranged on the outer peripheral side of the inner ring base.

9. A burner, characterized in that: The burner comprises a burner fire cover as claimed in any one of claims 1-8.

10. A gas stove, characterized in that: The gas stove includes the burner as claimed in claim 9.

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