Combustor and stove

Abstract

The invention relates to the field of kitchen utensils, and particularly discloses a combustor and a kitchen range. The outer ring fire cover sequentially comprises an upper ring, a middle ring and a lower ring; a first fire outlet circular seam is formed between the upper ring and the middle ring, and a second fire outlet circular seam is formed between the middle ring and the lower ring; a plurality of grooves which are evenly distributed in the circumferential direction are formed in the peripheral edge of the middle ring. Through the mode that the grooves are additionally formed in the middle ring, the speed of local flames is reduced to be too high, the problem that large-flow low-resistance airflow is unstable is solved, and stable and high-speed spreading of the flames is achieved. When airflow flows out from the bottom of the first fire outlet circular seam and the bottom of the second fire outlet circular seam, part of airflow flows out from the grooves, under the deceleration effect of the grooves, the airflow on the two sides are mutually stable and balanced, the effects of large flow and low resistance of the circular seams under the flow can be guaranteed, meanwhile, stable airflow can be generated, and the flame stabilizing effect is better.

Description

Technical Field

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

[0002] In the existing slit fire hole burner, the fire cover has a plurality of annular air outlets, and there are connecting structures between the annular air outlets, and the airflow flows out from the mixing chamber through the annular air outlets. The larger the circumference of the annular air outlet, the smaller the resistance of the airflow, the faster the airflow speed, the higher the flame speed, and the better the heat exchange effect. Reducing the circumference will increase the resistance and reduce the flame speed. Generally, 3-6 connecting or guiding structures are selected.

[0003] When the primary air is greater than 0.7, the flame speed of the fire cover structure with annular gap air outlet is relatively large, and the flame forms a ring curtain shape. The gap flame has poor guiding and limiting effects in the annular direction (the circumference of the circular outlet hole is guided and restricted by the circular hole, and the flame is relatively stable). When the local pressure is uneven and unstable, some flames will shake violently, be inconsistent in height, or fall off the flame, which will have a great impact on the performance. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to ensure low resistance effect and stability under the condition of large flow rate of the annular air outlet, and to provide a burner and a stove.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A burner, comprising: an outer ring fire cover;

[0007] The outer ring fire cover comprises in sequence: an upper ring, a middle ring and a lower ring;

[0008] A first fire-out ring gap is formed between the upper ring and the middle ring, and a second fire-out ring gap is formed between the middle ring and the lower ring;

[0009] The outer peripheral edge of the middle ring is provided with a plurality of grooves evenly arranged along the circumferential direction.

[0010] In this solution, by adding grooves on the middle ring, the local flame speed is reduced, the unstable state of large flow and low resistance airflow is solved, and the flame is stably propagated at high speed. When the airflow flows out from the bottom of the first fire outlet ring gap and the second outlet ring gap, part of the airflow flows out from the groove. Under the deceleration effect of the groove, the airflows on both sides are stabilized and balanced with each other, which can ensure the large flow and low resistance effect of the ring gap under the flow rate, and at the same time can generate stable airflow, and the flame stabilization effect is better.

[0011] Preferably, the groove is a trapezoidal structure and converges toward the bottom of the groove.

[0012] In this solution, the groove is a trapezoidal structure, which is more conducive to the airflow flowing out of the groove.

[0013] Preferably, there is a protrusion between adjacent grooves, and the protrusion is a trapezoidal structure.

[0014] In this solution, the outer peripheral edge of the middle ring is a convex and concave structure, which facilitates the uniform arrangement of the grooves.

[0015] Preferably, a plurality of supporting portions are provided on the surface of the middle ring facing the upper ring, the supporting portions abut against the upper ring, and a plurality of notches are provided at the portions of the supporting portions abutting against the upper ring.

[0016] In this solution, the position between the upper ring and the middle ring is fixed by the support part, and a plurality of notches are provided on the support part to facilitate the outflow of airflow and avoid uneven airflow out of the first fire ring gap.

[0017] Preferably, the first fire ring slit and the second fire ring slit both extend in the radial direction of the outer fire ring cover toward the center and downward of the outer fire ring cover.

[0018] Preferably, the lower end of the middle ring is provided with a plurality of through holes arranged along the circumference of the outer ring fire cover, and the through holes connect the first fire outlet ring seam and the second fire outlet ring seam.

[0019] Preferably, the bottom of the second fire outlet annular slit is closed, and a gas supply port is provided at the bottom of the first fire outlet annular slit, and the gas supply port is connected to the gas mixing chamber of the burner.

[0020] In this solution, the outlet gas of the second fire ring gap is supplied by the first fire ring gap, which plays a role in stabilizing the flame.

[0021] Preferably, the burner further comprises a base, wherein the base is arranged below the outer ring fire cover, and an air mixing chamber is arranged in the base.

[0022] Preferably, the upper part of the first ignition ring gap forms an annular gap cavity, and the lower part of the first ignition ring gap forms a mixing cavity, the radial dimension of the mixing cavity is larger than the radial dimension of the annular gap cavity, the perforation is arranged corresponding to the position of the mixing cavity, and the gas supply port is connected to the mixing cavity.

[0023] In this solution, the gas is mixed before being ejected from the fire ring gap, thereby making the flame more stable.

[0024] A cooker comprises the burner as described above.

[0025] The positive and progressive effect of the present invention is that by adding grooves on the middle ring, the local flame speed is reduced, the unstable state of large flow and low resistance airflow is solved, and the flame is stably propagated at a high speed. When the airflow flows out from the bottom of the first fire outlet ring seam and the second outlet ring seam, part of the airflow flows out from the groove. Under the deceleration effect of the groove, the airflows on both sides are stabilized and balanced with each other, which can ensure the large flow and low resistance effect of the ring seam under the flow rate, and at the same time can produce a stable airflow, and the flame stabilization effect is better. The stove with this burner has the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of a burner according to an embodiment of the present invention.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of a burner according to an embodiment of the present invention.

[0028] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A.

[0029] Figure 4 FIG. 4 is a schematic diagram of the three-dimensional structure of an upper ring according to an embodiment of the present invention.

[0030] Figure 5 FIG. 4 is a schematic diagram of the three-dimensional structure of a middle ring according to an embodiment of the present invention.

[0031] Figure 6 Schematic diagram of the top view of the middle ring according to an embodiment of the present invention.

[0032] Figure 7 Schematic diagram of the three-dimensional structure of the lower ring according to an embodiment of the present invention.

[0033] Figure 8 FIG. 4 is a schematic diagram of a three-dimensional structure of a base according to an embodiment of the present invention.

[0034] Explanation of the reference numerals: burner 100; inner ring fire cover 110; outer ring fire cover 120; upper ring 121; fire transfer hole 1211; middle ring 122; groove 1221; protrusion 1222; support portion 1223; notch 1224; bottom cover 1225; gas supply port 1226; lower ring 123; bottom plate 1231; gas through hole 1233; base 130; mixing chamber 131; first fire outlet ring gap 140; first ring gap cavity 141; first mixing cavity 142; second fire outlet ring gap 150; second ring gap cavity 151; second mixing cavity 152; through hole 170. DETAILED DESCRIPTION

[0035] 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.

[0036] like Figure 1-8 As shown, this embodiment provides a burner 100 , which includes: an inner ring fire cover 110 and an outer ring fire cover 120 .

[0037] The outer ring fire cover 120 includes, from top to bottom, an upper ring 121 , a middle ring 122 and a lower ring 123 .

[0038] A first ignition annular gap 140 is formed between the upper ring 121 and the middle ring 122 , a second ignition annular gap 150 is formed between the middle ring 122 and the lower ring 123 , and a plurality of grooves 1221 evenly arranged along the circumferential direction are provided on the outer peripheral edge of the middle ring 122 .

[0039] By adding the groove 1221 on the middle ring 122, the local flame speed is reduced, the unstable state of the large flow and low resistance airflow is solved, and the flame is stably propagated at a high speed. When the airflow flows out from the first fire outlet ring gap 140 and the bottom of the second outlet ring gap, part of the airflow flows out from the groove 1221. Under the deceleration effect of the groove 1221, the airflows on both sides are stabilized and balanced with each other, which can ensure the large flow and low resistance effect of the ring 123 under the flow rate, and at the same time can generate a stable airflow, and the flame stabilization effect is better.

[0040] The upper ring 121 is provided with a fire transfer hole 1211 , through which the fire in the inner ring is transferred to the fire in the outer ring.

[0041] The groove 1221 is a trapezoidal structure and converges toward the bottom of the groove 1221. The groove 1221 is a trapezoidal structure, which is more conducive to the airflow flowing out of the groove 1221. Optionally, the groove 1221 can also be other shapes, such as semicircular, rectangular, etc.

[0042] There are protrusions 1222 between adjacent grooves 1221, and the protrusions 1222 are trapezoidal structures. The outer peripheral edge of the middle ring 122 is a convex and concave structure, which facilitates the uniform arrangement of the grooves 1221.

[0043] like Figure 5 As shown, a plurality of supporting portions 1223 are provided on the surface of the middle ring 122 facing the upper ring 121 . The supporting portions 1223 abut against the upper ring 121 . A plurality of notches 1224 are provided at the portion of the supporting portions 1223 abutting against the upper ring 121 .

[0044] The position between the upper ring 121 and the middle ring 122 is fixed by the support portion 1223 , and a plurality of notches 1224 are provided on the support portion 1223 to facilitate the outflow of airflow and avoid uneven airflow out of the first fire ring gap 140 .

[0045] The first fire ring slit 140 and the second fire ring slit 150 both extend toward the center and downward of the outer fire ring cover 120 in the radial direction of the outer fire ring cover 120 .

[0046] The lower end of the middle ring 122 is provided with a plurality of through holes 170 arranged along the circumference of the outer ring fire cover 120, and the through holes 170 are connected to the first fire ring slit 140 and the second fire ring slit 150. The through holes 170 are circular holes. Through these through holes 170, the first fire ring slit 140 and the second fire ring slit 150 are opened, and the fire of the two fire ring slits can be realized by supplying air to one of the fire ring slits.

[0047] The bottom of the second ignition annular slit 150 is closed, and a gas supply port 1226 is provided at the bottom of the first ignition annular slit 140, and the gas supply port 1226 is connected to the gas mixing chamber 131 of the burner 100. The gas of the second ignition annular slit 150 is supplied by the first ignition annular slit 140, which plays a role in stabilizing flame.

[0048] The burner 100 further includes a base 130 , which is disposed below the outer ring fire cover 120 , and a gas mixing chamber 131 is disposed in the base 130 .

[0049] The gas supply port 1226 is provided at the bottom cover 1225 of the middle ring 122, which corresponds to the position of the gas through hole 1233 on the bottom plate 1231 of the lower ring 123, and the gas supply port 1226 and the gas through hole 1233 correspond to the position of the gas mixing chamber 131 in the base 130. After the gas enters the gas mixing chamber 131, it is mixed and then supplied to the first ignition annular gap 140 through the gas through hole 1233 and the gas supply port 1226.

[0050] The upper portion of the first ignition annular slit 140 forms a first annular slit cavity 141, and the lower portion of the first ignition annular slit 140 forms a first mixing cavity 142. The radial dimension of the first mixing cavity 142 is greater than the radial dimension of the first annular slit cavity 141. The through hole 170 is arranged corresponding to the position of the first mixing cavity 142, and the gas supply port 1226 is connected to the first mixing cavity 142. The support portion 1223 is arranged between the first mixing cavity 142 and the second mixing cavity 152.

[0051] A second annular gap cavity 151 is formed at the upper part of the second fire annular gap 150, and a second mixing cavity 152 is formed at the lower part of the second fire annular gap 150. The radial dimension of the second mixing cavity 152 is greater than the radial dimension of the second annular gap cavity 151. The second mixing cavity 152 is arranged at a position corresponding to the first mixing cavity 142, and the first mixing cavity 142 and the second mixing cavity 152 are connected through the through hole 170.

[0052] After the gas flowing out of the gas supply port 1226 enters the first mixing chamber 142, a part of it is supplied to the first annular gap chamber 141, and the other part is supplied to the second mixing chamber 152 through the perforation 170, and then supplied from the second mixing chamber 152 to the second annular gap chamber 151. The gas first enters the mixing chamber with a larger size and then enters the annular gap chamber, and can be diffused and evenly distributed in the mixing chamber, so that the gas outlet is more uniform, thereby obtaining a more stable flame.

[0053] A demonstration experiment was conducted to demonstrate the improvement effect of the structure of the burner 100 of the present invention, and the experimental results are shown in Table 1 below.

[0054] The difference between the comparative example and the present embodiment is that the present embodiment has a groove 1221 structure on the outer peripheral edge of the middle ring 122 .

[0055] Table 1

[0056]

[0057] According to Table 1, it can be found that the present embodiment after the structural improvement has improvements in flue gas, efficiency, uniformity, flame stabilization effect, uniformity, noise, and fire transmission, among which the improvements in flue gas, uniformity, and flame stabilization effect are particularly obvious. The emission of flue gas is reduced from 357ppm to 310ppm. The maximum pressure required for flame separation is increased from 3100Pa to 3800Pa, and the flame is less likely to separate, so the flame stabilization effect is better. The uniformity is also greatly improved. In the field of gas stoves, the uniformity of the flame refers to whether the height, size, and distribution of the flame are consistent and stable when the gas stove is burning. Specifically, the flame uniformity involves the following aspects: Consistent flame height: After the gas stove is ignited, the flame height of each fire hole should be basically consistent, without obvious height differences. Uniform flame distribution: The flame should be evenly distributed on each fire hole of the burner 100, without the situation where the local flame is too large or too small. Combustion stability: The flame should remain stable during the combustion process, without the phenomenon of flame separation (flame separation from the fire hole), flashback (flame backflow) or flameout. Combustion sufficiency: The flame should be clear blue, indicating that the gas and air are fully mixed and burned completely. The improved structure of this embodiment has a significant improvement in uniformity. When the flame of the first fire ring slit 140 and the flame of the second fire ring slit 150 are uneven, the airflow at the root of the flame is balanced in the bottom area of ​​the groove 1221 of the middle ring 122. When the airflow is too large, the groove 1221 can be used as a fire hole for gas combustion, and the annular flames on both sides can be used as flame stabilizers to stabilize them, which can increase uniformity and improve combustion adaptability.

[0058] This embodiment further provides a stove, which includes the burner 100 as described above.

[0059] 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.

[0060] 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, characterized in that: It includes: Outer ring fire cover; The outer ring fire cover comprises in sequence: an upper ring, a middle ring and a lower ring; A first fire-out ring gap is formed between the upper ring and the middle ring, and a second fire-out ring gap is formed between the middle ring and the lower ring; The outer peripheral edge of the middle ring is provided with a plurality of grooves evenly arranged along the circumferential direction.

2. The burner according to claim 1, characterized in that The groove is a trapezoidal structure and converges toward the bottom of the groove.

3. The burner according to claim 2, characterized in that There are protrusions between adjacent grooves, and the protrusions are of a trapezoidal structure.

4. The burner according to claim 1, characterized in that A plurality of supporting parts are arranged on the surface of the middle ring facing the upper ring, the supporting parts abut against the upper ring, and a plurality of notches are arranged at the parts of the supporting parts abutting against the upper ring.

5. The burner according to claim 1, characterized in that The first fire ring slit and the second fire ring slit both extend toward the center and downward of the outer fire ring cover in the radial direction of the outer fire ring cover.

6. The burner according to claim 1, characterized in that The lower end of the middle ring is provided with a plurality of through holes arranged along the circumference of the outer ring fire cover, and the through holes are connected with the first fire outlet ring seam and the second fire outlet ring seam.

7. The burner according to claim 6, characterized in that The bottom of the second fire outlet annular slit is closed, and a gas supply port is provided at the bottom of the first fire outlet annular slit, and the gas supply port is connected to the gas mixing chamber of the burner.

8. The burner according to claim 7, characterized in that The burner also includes a base, which is arranged below the outer ring fire cover, and a gas mixing chamber is arranged in the base.

9. The burner according to claim 7, characterized in that The upper part of the first ignition annular gap forms an annular gap cavity, and the lower part of the first ignition annular gap forms a mixing cavity. The radial dimension of the mixing cavity is larger than the radial dimension of the annular gap cavity. The perforation is arranged corresponding to the position of the mixing cavity, and the gas supply port is connected to the mixing cavity.

10. A cooking appliance, characterized in that: It comprises the burner according to any one of claims 1-9.

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