Outer ring fire cap

Abstract

This invention discloses an outer ring burner cap, relating to the field of burner technology. The outer ring burner cap includes an upper burner cap and a lower burner cap. The upper burner cap fits onto the lower burner cap to form an inner ring of flame holes, located on the radially inner sidewall of the outer ring burner cap. The inner ring of flame holes includes a first flame hole and a second flame hole. In the circumferential direction of the outer ring burner cap, the upper burner cap can rotate relative to the lower burner cap between a first extreme position and a second extreme position to change the difference in size between the first and second flame holes. When the upper burner cap rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring burner cap, the first flame hole gradually enlarges, and the second flame hole gradually decreases, thereby changing the difference in size between the first and second flame holes. This changes the overall flame height of the inner ring of flame holes, thus altering the degree of heating of the inner ring of the pot bottom and preventing uneven heating of the food inside the pot due to uneven heat distribution between the inner and outer rings.

Description

Technical Field

[0001] This invention relates to the field of burner technology, and in particular to an outer ring burner cap. Background Technology

[0002] Currently, most burners on the market use a combination of inner and outer burner caps. These two caps create two separate flames to ignite the cookware. Typically, the inner ring bears a lower load than the outer ring, resulting in uneven heat output and insufficient heat from the inner ring. This leads to uneven heating of the cookware. Users often experience a situation where the outer ring of the food in the pot boils continuously, while the food in the center of the inner ring remains sluggish, resulting in a poor cooking experience. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect of uneven heat distribution in the inner and outer rings of the burner cap in the prior art, which leads to uneven heating of food in the pot, and to provide an outer ring burner cap.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] The present invention provides an outer ring flame cap, which includes an upper flame cap and a lower flame cap. The upper flame cap covers the lower flame cap to form an inner ring flame hole, and the inner ring flame hole is located on the radial inner sidewall of the outer ring flame cap.

[0006] The inner ring flame hole includes a first flame hole and a second flame hole. In the circumferential direction of the outer ring flame cap, the upper flame cap can rotate relative to the lower flame cap between a first limit position and a second limit position to change the difference in flame hole size between the first flame hole and the second flame hole.

[0007] When the upper flame cap rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring flame cap, the first flame hole gradually increases in size, and the second flame hole gradually decreases in size.

[0008] In this design, based on Bernoulli's principle, at a constant air pressure, the smaller the cross-sectional area of ​​the fluid channel, the faster the fluid velocity. Therefore, the smaller the flame holes, the longer the flame, the closer the flame is to the bottom of the pot, and the easier it is for the pot to heat up. The inner ring of flame holes includes a first flame hole and a second flame hole. When the position of the upper burner cap relative to the lower burner cap changes between a first and a second extreme position, the difference in size between the first and second flame holes changes. Since the total size of the inner ring of flame holes is constant—that is, the total size of the first and second flame holes is constant—changing the difference in size between the first and second flame holes can change the overall flame height of the inner ring of flame holes. Specifically, the closer the sizes of the first and second flame holes are, the closer their flame heights are to a moderate level, and the lower the overall flame height of the inner ring flame holes. Conversely, the greater the difference in size between the first and second flame holes, the higher the flame height of the relatively smaller hole, leading to a higher overall flame height of the inner ring flame holes and making it easier for the flame to reach the bottom of the pot. When the upper burner lid rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring burner lid, the first flame hole gradually enlarges while the second flame hole gradually decreases, thus changing the difference in size between the first and second flame holes. This alters the overall flame height of the inner ring flame holes, thereby changing the degree of heating of the inner ring pot bottom and preventing uneven heating of the food inside the pot due to uneven heat distribution between the inner and outer rings.

[0009] Preferably, the upper flame cap, when fitted onto the lower flame cap, also forms an outer ring of flame holes, which are located on the radially outer sidewall of the outer ring flame cap.

[0010] The outer ring flame hole includes a third flame hole and a fourth flame hole. When the upper flame cap rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring flame cap, the third flame hole gradually decreases and the fourth flame hole gradually increases.

[0011] In this design, the outer ring burner cap, in addition to the inner ring burner holes, also has an outer ring burner hole. The outer ring burner hole is located on the radial outer side wall of the outer ring burner cap. The outer ring burner cap includes a third burner hole and a fourth burner hole. When the upper burner cap rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring burner cap, the third burner hole gradually decreases and the fourth burner hole gradually increases, thereby changing the difference in the size of the third and fourth burner holes. This causes a change in the overall flame height of the outer ring burner holes, which in turn changes the degree of heating of the outer ring pot bottom. While adjusting the inner ring firepower, the outer ring firepower can also be adjusted, further improving the effect of the outer ring burner cap in adjusting the firepower.

[0012] Preferably, at the first extreme position, the first and second flame holes are of equal size, the third flame hole is at its maximum size, and the fourth flame hole is at its minimum size.

[0013] At the second extreme position, the first flame hole is at its maximum size, the second flame hole is at its minimum size, and the third and fourth flame holes are of equal size.

[0014] In this design, at the first extreme position, the first and second flame holes are of equal size and flame height. The overall flame height of the inner ring flame holes is relatively low, reducing heating of the inner ring of the cookware. At this time, the third flame hole is at its maximum size, and the fourth flame hole is at its minimum size. The flame height of the third flame hole is low, while the flame height of the fourth flame hole is high. The outer ring flame holes increase the difference in size between the third and fourth flame holes, thereby increasing the flame height of some parts of the outer ring flame holes. The overall flame height of the outer ring flame holes is higher, making it easier to heat the bottom of the pot located on the outer ring, thus supplementing the heat gained by the outer ring of the cookware.

[0015] Conversely, at the second extreme position, the first flame hole is at its maximum size, and the second flame hole is at its minimum size. The overall flame height of the inner ring flame holes is higher, making it easier to heat the bottom of the pot located in the inner ring, thereby supplementing the heat obtained by the inner ring of the pot. The third and fourth flame holes are of equal size, resulting in a lower overall flame height of the outer ring flame holes, reducing the heating of the outer ring of the pot.

[0016] Preferably, the first and second flame holes are alternately spaced along the circumference of the outer ring flame cap;

[0017] The third and fourth fire holes are alternately spaced along the circumference of the outer ring fire cover.

[0018] In this design, by alternating the first and second flame holes along the circumference of the outer ring burner cap, the flames from the inner ring flame holes are more evenly distributed around the outer ring burner cap, resulting in more uniform heating of the inner ring of the cookware. Similarly, by alternating the third and fourth flame holes along the circumference of the outer ring burner cap, the flames from the outer ring flame holes are more evenly distributed around the outer ring burner cap, resulting in more uniform heating of the outer ring of the cookware.

[0019] Preferably, the upper flame cap includes an upper flame cap body and a plurality of first protrusions spaced apart along the circumferential direction of the outer ring flame cap. The first protrusions extend downward from the lower end of the upper flame cap body, and a first groove is formed between two adjacent first protrusions.

[0020] The lower flame cap is provided with a lower flame cap body and a plurality of second protrusions spaced apart along the circumferential direction of the outer ring flame cap. The second protrusions extend upward from the upper end of the lower flame cap body, and a second groove is formed between two adjacent second protrusions.

[0021] The first protrusion is accommodated in the second groove, and the lower surface of the first protrusion is in contact with the bottom surface of the second groove; the second protrusion is accommodated in the first groove, and the upper surface of the second protrusion is in contact with the bottom surface of the first groove; the first protrusion and the second protrusion located on both sides of the first protrusion in the circumferential direction of the outer ring flame cap respectively form the first flame hole and the second flame hole.

[0022] In this design, by setting a first protrusion and a second protrusion, a first groove is formed between two adjacent first protrusions, and a second groove is formed between two adjacent second protrusions. The first protrusion is accommodated in the second groove, and the lower surface of the first protrusion is attached to the bottom surface of the second groove. The upper surface of the second protrusion is attached to the bottom surface of the first groove, thereby forming a first flame hole and a second flame hole between the first protrusion and the second protrusions located on both sides of the outer ring flame cap in the circumferential direction. The overall structure of the outer ring flame cap is relatively simple, easy to manufacture, and easy to disassemble for cleaning of the upper and lower flame caps separately.

[0023] Preferably, the upper flame cap further includes a plurality of third protrusions spaced apart along the circumferential direction of the outer ring flame cap, the third protrusions extending downward from the lower end of the upper flame cap body, and a third groove forming between two adjacent third protrusions;

[0024] The lower flame cap also includes a plurality of fourth protrusions spaced apart along the circumferential direction of the outer ring flame cap. The fourth protrusions extend upward from the upper end of the lower flame cap body, and a fourth groove is formed between two adjacent fourth protrusions.

[0025] The third protrusion is accommodated in the fourth groove, and the lower surface of the third protrusion is in contact with the bottom surface of the fourth groove; the fourth protrusion is accommodated in the third groove, and the upper surface of the fourth protrusion is in contact with the bottom surface of the third groove; the third protrusion and the fourth protrusion located on both sides of the third protrusion in the circumferential direction of the outer ring flame cap respectively form the third flame hole and the fourth flame hole.

[0026] In this design, by setting a third protrusion and a fourth protrusion, a third groove is formed between two adjacent third protrusions, and a fourth groove is formed between two adjacent fourth protrusions. The third protrusion is accommodated in the fourth groove, with the lower surface of the third protrusion adhering to the bottom surface of the fourth groove. The upper surface of the fourth protrusion is adhering to the bottom surface of the third groove, thereby forming a third flame hole and a fourth flame hole between the third protrusion and the fourth protrusions located on both sides of the outer ring flame cap in the circumferential direction. The overall structure of the outer ring flame cap is relatively simple, convenient for manufacturing, and easy to disassemble for cleaning of the upper and lower flame caps separately.

[0027] Preferably, for the first flame hole and the second flame hole that are adjacent to the first protrusion in the circumferential direction of the outer ring flame cap, the first flame hole is located on the side of the second flame hole facing the first direction in the circumferential direction of the outer ring flame cap.

[0028] For the third flame hole and the fourth flame hole that are adjacent to the third protrusion in the circumferential direction of the outer ring flame cap, the third flame hole is located on the side of the fourth flame hole facing the second direction in the circumferential direction of the outer ring flame cap.

[0029] The first direction and the second direction are opposite in the circumferential direction of the outer ring fire cap.

[0030] In this design, by setting the first and second directions to be opposite in the circumferential direction of the outer ring burner cap, the difference in the size of the inner and outer ring burner holes changes in opposite directions. That is, when the difference in the size of the first and second burner holes increases, the difference in the size of the third and fourth burner holes decreases, thereby causing the overall flame height of the inner and outer ring burner holes to change in opposite directions. When the inner ring flame becomes larger, the outer ring flame becomes smaller, and vice versa. This makes it easier to adjust the heating conditions of the inner and outer rings of the pot bottom.

[0031] Preferably, the first groove and the second groove are arc-shaped at both ends in the circumferential direction of the outer ring flame cap;

[0032] And / or, the third groove and the fourth groove are arc-shaped at both ends in the circumferential direction of the outer ring fire cap.

[0033] In this solution, by setting the two ends of the first and second grooves in the circumferential direction of the outer ring flame cap to be arc-shaped, and setting the two ends of the third and fourth grooves in the circumferential direction of the outer ring flame cap to be arc-shaped, it is easier to clean the outer ring flame cap after disassembly.

[0034] Preferably, the lower fire cover includes an inner ring portion, an outer ring portion, and a connector, wherein the second protrusion is disposed on the inner ring portion, the fourth protrusion is disposed on the outer ring portion, and the two ends of the connector are respectively connected to the inner ring portion and the outer ring portion.

[0035] In this solution, by setting the lower burner cap into an inner ring and an outer ring, and connecting the inner ring and outer ring with a connector, the overall material usage and weight of the lower burner cap are reduced, production costs are saved, and the lower burner cap is also easier to clean.

[0036] Preferably, in the direction from the radially inner side to the radially outer side of the outer ring flame cap, the outer ring flame hole extends obliquely upward;

[0037] And / or, in the direction from the radially outer side to the radially inner side of the outer ring flame cap, the inner ring flame hole extends obliquely upward.

[0038] In this design, by setting the outer and inner ring flame holes to extend obliquely upwards, it is easier for the flame to burn upwards and scorch the bottom of the pot, thus improving the heating effect of the bottom of the pot.

[0039] The positive and progressive effects of this invention are as follows:

[0040] The inner ring of flame holes includes a first flame hole and a second flame hole. When the position of the upper burner cap relative to the lower burner cap changes between a first and a second extreme position, the difference in size between the first and second flame holes changes. Since the total size of the inner ring of flame holes is constant (i.e., the total size of the first and second flame holes is constant), changes in the size difference between the first and second flame holes can alter the overall flame height of the inner ring. Specifically, the closer the sizes of the first and second flame holes are, the closer their flame heights are to a moderate level, and the lower the overall flame height of the inner ring. Conversely, the greater the size difference between the first and second flame holes, the higher the flame height of the relatively smaller flame hole, resulting in a higher overall flame height for the inner ring and making it easier for the flame to reach the bottom of the pot. When the upper burner lid rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring burner lid, the first burner hole gradually enlarges and the second burner hole gradually decreases, thereby changing the difference in the size of the first and second burner holes. This causes a change in the overall flame height of the inner ring burner holes, which in turn changes the degree of heating of the inner ring bottom of the pot, avoiding uneven heating of the food in the pot caused by uneven heat between the inner and outer rings. Attached Figure Description

[0041] Figure 1 This is a three-dimensional structural diagram of the outer ring fire cap at the first extreme position according to an embodiment of the present invention.

[0042] Figure 2 This is a three-dimensional structural diagram of the outer ring fire cap at the second extreme position according to an embodiment of the present invention.

[0043] Figure 3 This is a cross-sectional three-dimensional structural diagram of the outer ring flame cap according to an embodiment of the present invention.

[0044] Figure 4 This is a three-dimensional structural diagram of the upper heating cap according to an embodiment of the present invention.

[0045] Figure 5 This is a three-dimensional structural diagram of the lower fire cover according to an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] Outer ring fire cap 100

[0048] Radial inner wall 110

[0049] Radial outer wall 120

[0050] Top cover 200

[0051] Lid body 210

[0052] First protrusion 220

[0053] First groove 230

[0054] Third protrusion 240

[0055] Third groove 250

[0056] 300mm lower heat cap

[0057] Lower fire cover body 310

[0058] Second protrusion 320

[0059] Second groove 330

[0060] Fourth protrusion 340

[0061] Fourth groove 350

[0062] 360° inner circle

[0063] Outer ring 370

[0064] Connector 380

[0065] Inner ring fire hole 400

[0066] First fire hole 410

[0067] Second fire hole 420

[0068] Outer ring fire hole 500

[0069] Third fire hole 510

[0070] Fourth fire hole 520

[0071] First direction a

[0072] Second direction b Detailed Implementation

[0073] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the following embodiments.

[0074] like Figure 1 and Figure 2As shown, this embodiment provides an outer ring flame cap 100, which includes an upper flame cap 200 and a lower flame cap 300. The upper flame cap 200 covers the lower flame cap 300 to form an inner ring flame hole 400, which is located on the radial inner sidewall 110 of the outer ring flame cap 100.

[0075] According to Bernoulli's principle, when the air pressure is constant, the smaller the cross-sectional area of ​​the fluid channel, the faster the fluid flow rate. It can be seen that when the fire hole is smaller, the flame length is longer, the flame is closer to the bottom of the pot, and the pot is easier to heat up.

[0076] The inner ring flame holes 400 include a first flame hole 410 and a second flame hole 420. In the circumferential direction of the outer ring flame cap 100, the upper flame cap 200 can rotate relative to the lower flame cap 300 between a first limit position and a second limit position to change the difference in flame hole size between the first flame hole 410 and the second flame hole 420. Since the total size of the inner ring flame holes 400 is constant—that is, the total size of the first flame hole 410 and the second flame hole 420 is constant—changing the difference in flame hole size between the first flame hole 410 and the second flame hole 420 can change the overall flame height of the inner ring flame holes 400. Specifically, the closer the sizes of the first fire hole 410 and the second fire hole 420 are, the closer the flame height of the first fire hole 410 and the second fire hole 420 is to a medium level, and the lower the overall flame height of the inner ring fire hole 400. Conversely, the greater the difference in the sizes of the first fire hole 410 and the second fire hole 420, the higher the flame height of the relatively smaller fire hole in the first fire hole 410 and the second fire hole 420, which in turn leads to a higher overall flame height of the inner ring fire hole 400, making it easier for the flame to scorch the bottom of the pot.

[0077] When the upper burner cap 200 rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring burner cap 100, the first burner hole 410 gradually increases in size and the second burner hole 420 gradually decreases in size. This changes the difference in size between the first burner hole 410 and the second burner hole 420, thereby changing the overall flame height of the inner ring burner hole 400. This, in turn, changes the degree of heating of the inner ring bottom of the pot, avoiding uneven heating of the food in the pot caused by uneven heat distribution between the inner and outer rings.

[0078] The upper burner cap 200, when placed on the lower burner cap 300, forms an outer ring of flame holes 500, located on the radial outer wall 120 of the outer ring burner cap 100. The outer ring of flame holes 500 includes a third flame hole 510 and a fourth flame hole 520. When the upper burner cap 200 rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring burner cap 100, the third flame hole 510 gradually decreases in size, while the fourth flame hole 520 gradually increases in size. This changes the difference in size between the third and fourth flame holes 510, thus altering the overall flame height of the outer ring of flame holes 500. Consequently, it changes the degree of heating of the outer ring pot bottom, allowing for adjustment of both the inner and outer ring heat, further enhancing the heat adjustment effect of the outer ring burner cap 100.

[0079] like Figure 1 As shown, at the first extreme position, the flame sizes of the first flame hole 410 and the second flame hole 420 are equal, and the flame heights of the first flame hole 410 and the second flame hole 420 are equal. The overall flame height of the inner ring flame hole 400 is relatively low, reducing the heating of the inner ring of the cookware. The third flame hole 510 is at its maximum state, and the fourth flame hole 520 is at its minimum state. The flame height of the third flame hole 510 is relatively low, while the flame height of the fourth flame hole 520 is relatively high. The outer ring flame hole 500 increases the difference in flame size between the third flame hole 510 and the fourth flame hole 520, thereby increasing the flame height of some parts of the outer ring flame hole 500. The overall flame height of the outer ring flame hole 500 is higher, making it easier for the bottom of the pot located on the outer ring to be heated, thus supplementing the heat obtained by the outer ring of the cookware.

[0080] like Figure 2 As shown, conversely, at the second extreme position, the first flame hole 410 is at its maximum and the second flame hole 420 is at its minimum. The overall flame height of the inner ring flame holes 400 is higher, making it easier to heat the bottom of the pot located in the inner ring, thereby supplementing the heat obtained by the inner ring of the pot. The flame holes 510 and 520 are of equal size, which results in a lower overall flame height of the outer ring flame holes 500, reducing the heating of the outer ring of the pot.

[0081] As shown in Figure 1, the first flame hole 410 and the second flame hole 420 are alternately spaced along the circumference of the outer ring flame cap 100, thereby making the flame of the inner ring flame hole 400 more evenly distributed around the circumference of the outer ring flame cap 100, and the inner ring of the cookware is heated more evenly. Similarly, the third flame hole 510 and the fourth flame hole 520 are alternately spaced along the circumference of the outer ring flame cap 100, thereby making the flame of the outer ring flame hole 500 more evenly distributed around the circumference of the outer ring flame cap 100, and the outer ring of the cookware is heated more evenly.

[0082] like Figure 4As shown, the upper flame cap 200 includes an upper flame cap body 210 and a plurality of first protrusions 220 spaced apart along the circumferential direction of the outer ring flame cap 100. The first protrusions 220 extend downward from the lower end of the upper flame cap body 210, and a first groove 230 is formed between two adjacent first protrusions 220. The lower flame cap 300 is provided with a lower flame cap body 310 and a plurality of second protrusions 320 spaced apart along the circumferential direction of the outer ring flame cap 100. The second protrusions 320 extend upward from the upper end of the lower flame cap body 310, and a second groove 330 is formed between two adjacent second protrusions 320.

[0083] The first protrusion 220 is accommodated within the second groove 330, with its lower surface adhering to the bottom surface of the second groove 330. The second protrusion 320 is accommodated within the first groove 230, with its upper surface adhering to the bottom surface of the first groove 230. A first flame hole 410 and a second flame hole 420 are formed between the first protrusion 220 and the second protrusions 320 located on either side of the first protrusion 220 in the circumferential direction of the outer ring flame cap 100, respectively. This results in a simpler overall structure of the outer ring flame cap 100, facilitating manufacturing and allowing for easy disassembly and cleaning of the upper flame cap 200 and lower flame cap 300.

[0084] Similarly, the upper flame cap 200 also includes a plurality of third protrusions 240 spaced apart along the circumferential direction of the outer ring flame cap 100. The third protrusions 240 extend downward from the lower end of the upper flame cap body 210, and a third groove 250 is formed between two adjacent third protrusions 240. The lower flame cap 300 also includes a plurality of fourth protrusions 340 spaced apart along the circumferential direction of the outer ring flame cap 100. The fourth protrusions 340 extend upward from the upper end of the lower flame cap body 310, and a fourth groove 350 is formed between two adjacent fourth protrusions 340.

[0085] The third protrusion 240 is accommodated within the fourth groove 350, with its lower surface adhering to the bottom surface of the fourth groove 350. The fourth protrusion 340 is accommodated within the third groove 250, with its upper surface adhering to the bottom surface of the third groove 250. The third protrusion 240 and the fourth protrusions 340 located on either side of it in the circumferential direction of the outer ring flame cap 100 respectively form a third flame hole 510 and a fourth flame hole 520. This makes the overall structure of the outer ring flame cap 100 simpler, easier to manufacture, and facilitates disassembly for cleaning of the upper flame cap 200 and lower flame cap 300.

[0086] like Figure 1As shown, for the first flame hole 410 and the second flame hole 420, which are adjacent to the first protrusion 220 in the circumferential direction of the outer ring flame cap 100, the first flame hole 410 is located on the side of the second flame hole 420 facing the first direction a in the circumferential direction of the outer ring flame cap 100. For the third flame hole 510 and the fourth flame hole 520, which are adjacent to the third protrusion 240 in the circumferential direction of the outer ring flame cap 100, the third flame hole 510 is located on the side of the fourth flame hole 520 facing the second direction b in the circumferential direction of the outer ring flame cap 100. The first direction a and the second direction b are opposite in the circumferential direction of the outer ring burner cap 100, which causes the difference in the size of the inner ring burner holes 400 and the outer ring burner holes 500 to change in opposite directions. That is, when the difference in the size of the burner holes between the first burner hole 410 and the second burner hole 420 increases, the difference in the size of the burner holes between the third burner hole 510 and the fourth burner hole 520 decreases. This causes the overall flame height of the inner ring burner holes 400 and the outer ring burner holes 500 to change in opposite directions. When the inner ring flame becomes larger, the outer ring flame becomes smaller, and vice versa. This makes it easier to adjust the heating conditions of the inner and outer rings of the pot bottom.

[0087] The first groove 230 and the second groove 330 are arc-shaped at both ends in the circumferential direction of the outer ring flame cap 100, and the third groove 250 and the fourth groove 350 are arc-shaped at both ends in the circumferential direction of the outer ring flame cap 100, which makes it easier to clean the outer ring flame cap 100 after disassembly.

[0088] like Figure 5 As shown, the lower burner cap 300 includes an inner ring portion 360, an outer ring portion 370, and a connector 380. A second protrusion 320 is located on the inner ring portion 360, and a fourth protrusion 340 is located on the outer ring portion 370. The two ends of the connector 380 are respectively connected to the inner ring portion 360 and the outer ring portion 370. By setting the lower burner cap 300 into an inner ring portion 360 and an outer ring portion 370, and connecting the inner ring portion 360 and the outer ring portion 370 through the connector 380, the overall material usage of the lower burner cap 300 is reduced, the overall weight of the lower burner cap 300 is reduced, production costs are saved, and the lower burner cap 300 is also easier to clean.

[0089] like Figure 3 As shown, the outer ring flame holes 500 extend obliquely upwards in the radially inward to radially outward direction of the outer ring flame cap 100. The inner ring flame holes 400 extend obliquely upwards in the radially outward to radially inward direction of the outer ring flame cap 100. By setting the outer ring flame holes 500 and inner ring flame holes 400 to extend obliquely upwards, it is easier for the flame to burn upwards and scorch the bottom of the pot, resulting in better heating of the pot bottom.

[0090] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship of the device or element during normal use. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation at any time, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention in this respect.

[0091] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An outer ring flame cap, characterized in that, The outer ring flame cap includes an upper flame cap and a lower flame cap. The upper flame cap covers the lower flame cap to form an inner ring flame hole, which is located on the radial inner sidewall of the outer ring flame cap. The inner ring flame hole includes a first flame hole and a second flame hole. In the circumferential direction of the outer ring flame cap, the upper flame cap can rotate relative to the lower flame cap between a first limit position and a second limit position to change the difference in flame hole size between the first flame hole and the second flame hole. When the upper flame cap rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring flame cap, the first flame hole gradually increases in size, and the second flame hole gradually decreases in size. The upper flame cap, when it is placed on the lower flame cap, also forms an outer ring flame hole, which is located on the radial outer side wall of the outer ring flame cap. The outer ring flame hole includes a third flame hole and a fourth flame hole. When the upper flame cover rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring flame cover, the third flame hole gradually decreases and the fourth flame hole gradually increases. The first and second flame holes are alternately spaced along the circumference of the outer ring flame cap; The third and fourth fire holes are alternately spaced along the circumference of the outer ring fire cover; The upper flame cap includes an upper flame cap body and a plurality of first protrusions spaced apart along the circumferential direction of the outer ring flame cap. The first protrusions extend downward from the lower end of the upper flame cap body, and a first groove is formed between two adjacent first protrusions. The lower flame cap is provided with a lower flame cap body and a plurality of second protrusions spaced apart along the circumferential direction of the outer ring flame cap. The second protrusions extend upward from the upper end of the lower flame cap body, and a second groove is formed between two adjacent second protrusions. The first protrusion is accommodated in the second groove, and the lower surface of the first protrusion is in contact with the bottom surface of the second groove; the second protrusion is accommodated in the first groove, and the upper surface of the second protrusion is in contact with the bottom surface of the first groove; the first protrusion and the second protrusion located on both sides of the first protrusion in the circumferential direction of the outer ring flame cap respectively form the first flame hole and the second flame hole. The upper flame cap also includes a plurality of third protrusions spaced apart along the circumferential direction of the outer ring flame cap. The third protrusions extend downward from the lower end of the upper flame cap body, and a third groove is formed between two adjacent third protrusions. The lower flame cap also includes a plurality of fourth protrusions spaced apart along the circumferential direction of the outer ring flame cap. The fourth protrusions extend upward from the upper end of the lower flame cap body, and a fourth groove is formed between two adjacent fourth protrusions. The third protrusion is accommodated in the fourth groove, and the lower surface of the third protrusion is in contact with the bottom surface of the fourth groove; the fourth protrusion is accommodated in the third groove, and the upper surface of the fourth protrusion is in contact with the bottom surface of the third groove; the third protrusion and the fourth protrusion located on both sides of the third protrusion in the circumferential direction of the outer ring flame cap respectively form the third flame hole and the fourth flame hole.

2. The outer ring flame cap as described in claim 1, characterized in that, At the first extreme position, the first and second flame holes are of equal size, the third flame hole is at its maximum size, and the fourth flame hole is at its minimum size. At the second extreme position, the first flame hole is at its maximum size, the second flame hole is at its minimum size, and the third and fourth flame holes are of equal size.

3. The outer ring flame cap as described in claim 1, characterized in that, For the first flame hole and the second flame hole that are adjacent to the first protrusion in the circumferential direction of the outer ring flame cap, the first flame hole is located on the side of the second flame hole facing the first direction in the circumferential direction of the outer ring flame cap. For the third flame hole and the fourth flame hole that are adjacent to the third protrusion in the circumferential direction of the outer ring flame cap, the third flame hole is located on the side of the fourth flame hole facing the second direction in the circumferential direction of the outer ring flame cap. The first direction and the second direction are opposite in the circumferential direction of the outer ring fire cap.

4. The outer ring flame cap as described in claim 1, characterized in that, The first groove and the second groove are arc-shaped at both ends in the circumferential direction of the outer ring fire cap; And / or, the third groove and the fourth groove are arc-shaped at both ends in the circumferential direction of the outer ring fire cap.

5. The outer ring flame cap as described in claim 1, characterized in that, The lower fire cover includes an inner ring portion, an outer ring portion, and a connector. The second protrusion is located on the inner ring portion, the fourth protrusion is located on the outer ring portion, and the two ends of the connector are respectively connected to the inner ring portion and the outer ring portion.

6. The outer ring flame cap as described in claim 1, characterized in that, In the direction from the radially inner side to the radially outer side of the outer ring flame cap, the outer ring flame hole extends obliquely upward; And / or, in the direction from the radially outer side to the radially inner side of the outer ring flame cap, the inner ring flame hole extends obliquely upward.

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