Combustor base, combustor and stove

Abstract

The invention relates to the field of kitchen utensils, and particularly discloses a burner base, a burner and a kitchen range. An outer ring injection channel and an outer ring gas cavity which are communicated with each other are arranged in the shell, a flow guide face is arranged in the outer ring gas cavity, and the flow guide face extends upwards from the connecting position of the outer ring injection channel and the outer ring gas cavity to form an upwards-protruding parabola shape. The flow guide face between the outer ring injection channel and the outer ring fuel gas cavity is designed to be in the shape of the parabola protruding upwards, the pneumatic performance of fuel gas is reserved, vortexes are reduced, the injection performance is improved, and therefore the combustion efficiency of the combustor is improved.

Description

Technical Field

[0001] The invention relates to the field of kitchen appliances, and in particular to a burner base, a burner and a stove. Background Art

[0002] The burner base is the intermediate structure connecting the ejector tube and the gas mixing chamber, and is mainly used to rectify the mixture of gas and air. Usually, the burner base consists of an inner ring gas channel and an outer ring gas channel, the inner ring gas channel is located in the center, and the outer ring gas channel surrounds the outer side of the inner ring gas channel.

[0003] The outer ring gas channel of the existing base rises from the outside, and the rising slope is not designed reasonably, resulting in a large cavity of the outer ring gas channel, a decrease in the aerodynamic performance of the gas in the cavity, and easy generation of vortex 10, such as Figure 1 As shown, the ejection performance is reduced.

[0004] At the same time, when the fire is turned off or reduced, the air flow velocity drops rapidly, and at the same time, a lot of combustible gas remains in the large cavity, causing the flame to spread into the cavity, which is prone to flashback in the burner. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art that the starting performance of gas in the cavity is reduced and eddy currents are easily generated, and to provide a burner base, a burner and a stove.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] A burner base, comprising: a shell;

[0008] An outer ring ejection channel and an outer ring gas cavity which are interconnected are provided in the shell, and a guide surface is provided in the outer ring gas cavity. The guide surface extends upward from the connection between the outer ring ejection channel and the outer ring gas cavity and forms an upwardly protruding parabolic shape.

[0009] In this solution, by designing the guide surface between the outer ring injection channel and the outer ring gas cavity to be an upwardly convex parabolic shape, the aerodynamic performance of the gas is retained, the vortex is reduced, the injection performance is improved, and the combustion efficiency of the burner is improved.

[0010] Preferably, the axis of the outer ring ejection channel is perpendicular to the upward extension direction of the guide surface.

[0011] A coordinate system is established with the axis of the outer ring ejection channel as the origin, the vertical direction as the Y axis, and the direction perpendicular to the axis of the outer ring ejection channel as the X axis.

[0012] The cross-sectional radius of the outer ring ejection channel is R, the bottom coordinate of the guide surface is (R, 0), and the vertex coordinate of the guide surface is (6R, ac).

[0013] The height from the origin to the vertex of the burner base is a, the height from the vertex of the guide surface to the vertex of the burner base is c, and the height from the guide surface to the vertex of the burner base at the midpoint on the X-axis between the origin and the vertex of the guide surface is b.

[0014] Wherein, the curve equation of the guide surface is:

[0015] X= * + - *y+R,

[0016] Among them, a > b > 0.6a > c> 0.75b, where a∈[2.5R, 3R]; b∈[1.5R, 1.8R]; c∈[1.125R, 1.35R].

[0017] In this solution, it is obtained through calculation that the above curve equation can obtain better combustion efficiency. Through the above curve equation, the guide surface can be easily formed, thereby facilitating the manufacture of the burner.

[0018] Preferably, the burner base is used for a downdraft burner.

[0019] In this scheme, the lower air inlet burner is different from the upper air inlet burner. The upper air inlet burner has a primary injection above the panel, and the distance from the gas ejected from the nozzle to the fire hole of the fire cover is very short, resulting in a smaller mixing chamber for the gas and air, which is prone to unevenness and needs to be expanded. The burner base is used for the lower air inlet burner, and the distance from the gas ejected from the nozzle to the fire hole of the fire cover is longer, which is prone to flow dead zones and backflow. The upward convex guide surface structure reduces the capacity space, which in turn has a better effect and reduces the occurrence of flow dead zones and backflow.

[0020] Preferably, the guide surface is the entire bottom surface of the outer ring gas cavity.

[0021] Preferably, the side of the outer ring ejection channel connected to the outer ring fuel gas cavity is open.

[0022] In this embodiment, such an arrangement enables the gas to be supplied from the entire side of the outer ring gas cavity, and the gas supply amount is relatively high.

[0023] Preferably, the outer peripheral edge of the outer ring gas cavity is provided with one or more protrusions protruding toward the outer peripheral side, and the inner cavity of the protrusion is communicated with the outer ring gas cavity.

[0024] In this solution, when the flame reignites, it will gather into a vortex at the protrusion, which is not easy to spread. It will go out after being depleted of oxygen and will not continue to burn.

[0025] Preferably, the plurality of protrusions are evenly arranged along the circumferential direction.

[0026] Preferably, the protrusion comprises two protrusions which are arranged at intervals and protrude toward the outer circumference, and the inner cavity of the protrusion is communicated with the outer ring gas cavity.

[0027] A burner comprises the burner base as described above.

[0028] A cooker comprises the burner as described above.

[0029] The positive and progressive effect of the present invention is that the burner base not only retains the aerodynamic performance of the gas, but also reduces the vortex and improves the injection performance, thereby improving the combustion efficiency of the burner. The burner and stove having the above-mentioned burner base have the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a simulation effect diagram showing the internal gas flow of the burner base in the prior art.

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of a burner according to an embodiment of the present invention.

[0032] Figure 3 Schematic diagram of the exploded structure of a burner according to an embodiment of the present invention.

[0033] Figure 4 It is a schematic diagram of the cross-sectional structure of a burner according to an embodiment of the present invention.

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of a burner base according to an embodiment of the present invention.

[0035] Figure 6 FIG. 1 is another schematic diagram of the three-dimensional structure of a burner base according to an embodiment of the present invention.

[0036] Figure 7 It is a schematic diagram of the side structure of a burner base according to an embodiment of the present invention.

[0037] Figure 8 The figure is a schematic cross-sectional structural diagram of a burner base according to an embodiment of the present invention.

[0038] Fig. 9It is a schematic diagram of the cross-sectional structure of a burner base with an accompanying coordinate system according to an embodiment of the present invention.

[0039] Fig.10 It is a comparison diagram of the simulation effects of this embodiment and the comparative example.

[0040] Explanation of the reference numerals: burner 100; fire cover 110; middle layer 120; ejector 130; burner base 140; shell 141; outer ring ejector channel 151; inner ring ejector channel 152; outer ring gas cavity 153; guide surface 154; inner ring gas cavity 155; outer ring gas mixing chamber 157; protrusion 158; projection 159. DETAILED DESCRIPTION

[0041] The present invention is further described below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0042] like Figure 2-4 As shown, this embodiment provides a burner 100, which includes a fire cover 110, an intermediate layer 120, a burner base 140, and an ejector 130. The fire cover 110, the intermediate layer 120, and the burner base 140 are arranged in sequence from top to bottom, and the ejector 130 includes an outer ring ejector tube and an inner ring ejector tube, which are respectively connected to an outer ring ejector channel 151 and an inner ring ejector channel 152 of the burner base 140.

[0043] like Figure 5-8 As shown, the burner base 140 includes: a shell 141; an outer ring injection channel 151 and an outer ring gas cavity 153 which are interconnected are provided in the shell 141, a guide surface 154 is provided in the outer ring gas cavity 153, and the guide surface 154 extends upward from the connection between the outer ring injection channel 151 and the outer ring gas cavity 153 and is formed into an upwardly protruding parabolic shape.

[0044] By designing the guide surface 154 between the outer ring injection channel 151 and the outer ring gas cavity 153 to be an upwardly convex parabolic shape, the aerodynamic performance of the gas is retained, the vortex is reduced, the injection performance is improved, and the combustion efficiency of the burner 100 is improved.

[0045] An inner ring gas cavity 155 is further provided in the shell 141 , and the inner ring gas cavity 155 is connected to the inner ring ejection channel 152 .

[0046] The shell 141 is also provided with a connecting hole and an outer ring gas mixing chamber 157. The outer ring gas mixing chamber 157 is provided above the outer ring gas cavity 153. The connecting hole is provided in the middle layer 120 between the outer ring gas mixing chamber 157 and the outer ring gas cavity 153 and connects the outer ring gas mixing chamber 157 and the outer ring gas cavity 153. The gas enters the outer ring gas cavity 153 from the ejector 130 through the outer ring ejection channel 151, is mixed, and then enters the outer ring gas mixing chamber 157 through a plurality of connecting holes, and then flows out from the fire hole of the outer ring fire cover 110.

[0047] The burner 100 of this embodiment is a bottom-inlet burner 100. The burner base 140 is used for the bottom-inlet burner 100. The bottom-inlet burner 100 is different from the top-inlet burner 100. The top-inlet burner 100 has a primary injection above the panel, and the distance from the nozzle to the fire hole of the fire cover 110 is very short, resulting in a smaller mixing chamber of the gas and air, which is prone to unevenness and needs to be expanded. The burner base 140 is used for the bottom-inlet burner 100, and the distance from the nozzle to the fire hole of the fire cover 110 is longer, which is prone to flow dead zones and backflow. The convex guide surface 154 structure reduces the capacity space, which has a better effect and reduces the generation of flow dead zones and backflow.

[0048] The guide surface 154 is the entire bottom surface of the outer ring gas cavity 153, see Figure 7 The guide surface 154 is parabolic in shape when viewed along the axis of the outer ring injection channel 151. The side of the outer ring injection channel 151 connected to the outer ring gas cavity 153 is open. This arrangement allows gas to be supplied from the entire side of the outer ring gas cavity 153, and the gas supply volume is high.

[0049] See also Fig. 9 , on the premise that it is known that the guide surface 154 having a substantially parabolic shape can improve the ejection performance, the curve equation of the parabola is obtained.

[0050] The axis of the outer ring ejection channel 151 is perpendicular to the upward extension direction of the guide surface 154 .

[0051] A coordinate system is established with the axis of the outer ring ejection channel 151 as the origin O, the vertical direction as the Y axis, and the direction perpendicular to the axis of the outer ring ejection channel 151 as the X axis.

[0052] The cross-sectional radius of the outer ring injection channel 151 is R, the bottom point coordinate P1 of the guide surface 154 is (R, 0), the vertex coordinate of the guide surface 154 is P3 (6R, ac), and the point coordinate on the guide surface 154 at the midpoint of P1 and P3 is P2 (3R, ab). P2 is also the intersection of the longitudinal axis of the burner base 140 and the guide surface 154.

[0053] The height from the origin O to the vertex of the burner base 140 is a, the height from the vertex P3 of the guide surface 154 to the vertex of the burner base 140 is c, and the height from the guide surface 154 to the vertex of the burner base 140 at the midpoint on the X-axis between the origin O and the vertex P3 of the guide surface 154 is b.

[0054] Based on the flow control law, the flow heights of the three sections A (initial section), B (middle section), and C (final section) must meet the following requirements:

[0055] a > b > 0.6a > c> 0.75b, where a∈[2.5R, 3R]; b∈[1.5R, 1.8R]; c∈[1.125R, 1.35R].

[0056] Let the curve equation be x=k +m*y+n, where (R, 0), (3R, ab), and (6R, ac) are on the curve

[0057] We can solve: n=Rk= m= -

[0058] So the curve equation can be: X= * + - *y+R

[0059] Therefore, the curve equation of the guide surface 154 is:

[0060] X= * + - *y+R;

[0061] Among them, a > b > 0.6a > c> 0.75b, where a∈[2.5R, 3R]; b∈[1.5R, 1.8R]; c∈[1.125R, 1.35R].

[0062] It is obtained through calculation that the above curve equation can obtain better combustion efficiency. Through the above curve equation, the guide surface 154 can be easily formed, thereby facilitating the manufacture of the burner 100.

[0063] like Fig.10 As shown, the left figure is a comparative example. The difference between the burner base 140 of the comparative example and the burner base 140 of this embodiment is the surface design of the guide surface 154. The guide surface 154 of the burner base 140 of the comparative example is a linear guide surface 154, while the guide surface 154 of this embodiment is a parabolic guide surface 154.

[0064] from Fig.10 It can be clearly seen that in the comparative example, there are multiple vortices in the outer ring gas cavity 153, while there is basically no vortex generated in the outer ring gas cavity 153 of this embodiment. Therefore, the burner base 140 of this embodiment can improve the induced performance and improve the combustion efficiency of the burner 100.

[0065] like Figure 5 As shown, the outer peripheral edge of the outer ring gas cavity 153 is provided with one or more protrusions 158 protruding toward the outer peripheral side 159. The inner cavity of the protrusion 158 is communicated with the outer ring gas cavity 153.

[0066] When the flame reignites, it will gather into a vortex at the protrusion 158, which is difficult to spread. It will be extinguished after being depleted of oxygen and will not continue to burn.

[0067] The protrusion 158 is preferably an irregular shape having a plurality of smaller protrusions 159 , so as to better form a vortex at the protrusions 159 , thereby reducing the probability of backfire. The inner cavity of the protrusion 159 is in communication with the outer ring gas cavity 153 .

[0068] In this embodiment, a plurality of protrusions 158 are uniformly arranged along the circumferential direction. The protrusions 158 include two projections 159 that are spaced apart and protrude toward the outer circumference.

[0069] This embodiment further provides a stove, which includes the burner 100 as described above.

[0070] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship of the device or element in normal use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation at any time, and therefore cannot be understood as a limitation of the present invention in this regard.

[0071] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A burner base, characterized in that: It includes: case; An outer ring ejection channel and an outer ring gas cavity which are interconnected are provided in the shell, and a guide surface is provided in the outer ring gas cavity. The guide surface extends upward from the connection between the outer ring ejection channel and the outer ring gas cavity and forms an upwardly protruding parabolic shape.

2. The burner base according to claim 1, characterized in that The axis of the outer ring ejection channel is perpendicular to the upward extension direction of the guide surface. A coordinate system is established with the axis of the outer ring ejection channel as the origin, the vertical direction as the Y axis, and the direction perpendicular to the axis of the outer ring ejection channel as the X axis. The cross-sectional radius of the outer ring ejection channel is R, the bottom coordinate of the guide surface is (R, 0), and the vertex coordinate of the guide surface is (6R, ac). The height from the origin to the vertex of the burner base is a, the height from the vertex of the guide surface to the vertex of the burner base is c, and the height from the guide surface to the vertex of the burner base at the midpoint on the X-axis between the origin and the vertex of the guide surface is b. Wherein, the curve equation of the guide surface is: X= * + - *y+R , Among them, a > b > 0.6a > c> 0.75b, where a∈[2.5R, 3R]; b∈[1.5R, 1.8R]; c∈[1.125R, 1.35R].

3. The burner base according to claim 1, characterized in that The burner base is used for a downward air inlet burner.

4. The burner base according to claim 1, characterized in that The guide surface is the entire bottom surface of the outer ring gas cavity.

5. The burner base according to claim 1, characterized in that The side of the outer ring ejection channel connected to the outer ring fuel gas cavity is open.

6. The burner base according to claim 1, characterized in that The outer peripheral edge of the outer ring gas cavity is provided with one or more protrusions protruding toward the outer peripheral side.

7. The burner base according to claim 6, characterized in that The plurality of protrusions are evenly arranged along the circumferential direction.

8. The burner base according to claim 6, characterized in that The protrusion includes two projections that are spaced apart and protrude toward the outer circumference.

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

10. A cooking appliance, characterized in that: It comprises a burner as claimed in claim 9.

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