Outer ring fire cover

Abstract

The invention discloses an outer ring fire cover, and relates to the technical field of combustors. The outer ring fire cover comprises an upper fire cover body and a lower fire cover body, the upper fire cover body covers the lower fire cover body to form inner ring fire holes, and the inner ring fire holes are located in the radial inner side wall of the outer ring fire cover body. The inner ring fire holes comprise first fire holes and second fire holes, and in the circumferential direction of the outer ring fire cover, the upper fire cover can rotate between a first limit position and a second limit position relative to the lower fire cover so as to change the difference value of the sizes of the first fire holes and the second fire holes. When the upper fire cover rotates from a first limit position to a second limit position in the circumferential direction of the outer ring fire cover, the first fire holes are gradually enlarged, and the second fire holes are gradually reduced, so that the difference between the sizes of the first fire holes and the sizes of the second fire holes is changed, the overall flame height of the inner ring fire holes is changed, and the heating degree of the inner ring pot bottom is changed; and the condition of non-uniform heating of food in the pot caused by non-uniform fire of the inner ring and the outer ring is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of burners, in particular to an outer ring fire cover. Background Art

[0002] At present, the burners on the market are usually composed of an inner ring fire cover and an outer ring fire cover. The inner ring fire cover and the outer ring fire cover form two groups of flames to burn the pot. Usually, the inner ring has a small load and the outer ring has a large load, which leads to uneven output of the inner and outer ring firepower and insufficient inner ring firepower, which in turn leads to uneven heating of the pot. When using the pot, users often encounter the situation that the outer ring of the ingredients in the pot is constantly boiling, but the ingredients in the center of the inner ring are always difficult to boil, resulting in a poor cooking experience for users. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an outer ring fire cover to overcome the defect that the fire power of the inner and outer rings of the fire cover of the burner in the prior art is uneven, resulting in uneven heating of food in the pot.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides an outer ring fire cover, the outer ring fire cover comprises an upper fire cover and a lower fire cover, the upper fire cover is covered on the lower fire cover to form an inner ring fire hole, the inner ring fire hole is located on the radial inner side wall of the outer ring fire cover;

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

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

[0008] In this solution, 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 length of the flame is longer, the flame is closer to the bottom of the pot, and the pot is more easily heated. The inner circle fire hole includes a first fire hole and a second fire hole. When the position of the upper fire cover relative to the lower fire cover changes between the first extreme position and the second extreme position, the difference in the size of the fire hole of the first fire hole and the second fire hole changes. Since the total amount of the fire hole size of the inner circle fire hole is constant, that is, the total amount of the fire hole size of the first fire hole and the second fire hole is constant, the change in the difference in the size of the fire hole between the first fire hole and the second fire hole can change the overall flame height of the inner circle fire hole. Specifically, when the sizes of the first fire hole and the second fire hole are closer, the flame heights of the first fire hole and the second fire hole are closer to the medium level, and the overall flame height of the inner ring fire hole is lower, and when the difference in the sizes of the first fire hole and the second fire hole is larger, the flame height of the relatively smaller fire hole of the first fire hole and the second fire hole is higher, which in turn leads to a higher overall flame height of the inner ring fire hole, and the flame is more likely to burn the bottom of the pot. When the upper fire cover rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring fire cover, the first fire hole gradually increases and the second fire hole gradually decreases, thereby changing the difference in the sizes of the first fire hole and the second fire hole, so that the overall flame height of the inner ring fire hole changes, and then the degree of heating of the inner ring pot bottom changes, avoiding uneven heating of the food in the pot due to uneven firepower of the inner and outer rings.

[0009] Preferably, the upper fire cover is covered on the lower fire cover to form an outer ring fire hole, and the outer ring fire hole is located on the radial outer side wall of the outer ring fire cover;

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

[0011] In the present scheme, in addition to the inner ring fire holes, the outer ring fire cover is also provided with an outer ring fire hole, and the outer ring fire holes are located on the radial outer side wall of the outer ring fire cover. The outer ring fire cover includes a third fire hole and a fourth fire hole. When the upper fire cover rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring fire cover, the third fire hole gradually decreases and the fourth fire hole gradually increases, thereby changing the difference in the size of the third fire hole and the fourth fire hole, so that the overall flame height of the outer ring fire hole changes, and then the heating degree of the outer ring pot bottom changes. The outer ring firepower can be adjusted while adjusting the inner ring firepower, further improving the effect of adjusting the firepower of the outer ring fire cover.

[0012] Preferably, in the first extreme position, the first fire hole and the second fire hole are equal in size, the third fire hole is in the maximum state, and the fourth fire hole is in the minimum state;

[0013] In the second extreme position, the first fire hole is in the maximum state, the second fire hole is in the minimum state, and the sizes of the third fire hole and the fourth fire hole are equal.

[0014] In this scheme, at the first extreme position, the sizes of the first fire hole and the second fire hole are equal, the flame heights of the first fire hole and the second fire hole are equal, and the overall flame height of the inner ring fire hole is relatively low, which reduces the heating of the inner ring of the pot. At this time, the third fire hole is in the maximum state, and the fourth fire hole is in the minimum state. The flame height of the third fire hole is relatively low, and the flame height of the fourth fire hole is relatively high. The outer ring fire hole increases the difference in the size of the fire holes between the third fire hole and the fourth fire hole, thereby making the partial flame height higher. The overall flame height of the outer ring fire hole is higher, making it easier to heat the bottom of the pot located in the outer ring, thereby supplementing the heat obtained by the outer ring of the pot.

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

[0016] Preferably, the first fire holes and the second fire holes are arranged alternately and spaced along the circumference of the outer ring fire cover;

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

[0018] In this solution, the first fire hole and the second fire hole are alternately arranged along the circumference of the outer ring fire cover, so that the flames of the inner ring fire holes are more balanced in the circumference of the outer ring fire cover, and the inner ring of the pot is heated more evenly. Similarly, the third fire hole and the fourth fire hole are alternately arranged along the circumference of the outer ring fire cover, so that the flames of the outer ring fire holes are more balanced in the circumference of the outer ring fire cover, and the outer ring of the pot is heated more evenly.

[0019] Preferably, the upper fire cover comprises an upper fire cover body and a plurality of first protrusions spaced apart along the circumferential direction of the outer ring fire cover, the first protrusions extending downward from the lower end of the upper fire cover body, and a first groove is formed between two adjacent first protrusions;

[0020] The lower fire cover is provided with a lower fire cover body and a plurality of second protrusions spaced apart along the circumferential direction of the outer ring fire cover, the second protrusions extending upward from the upper end of the lower fire cover 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 fits the bottom surface of the second groove; the second protrusion is accommodated in the first groove, and the upper surface of the second protrusion fits the bottom surface of the first groove; the first fire hole and the second fire hole are respectively formed between the first protrusion and the second protrusions located on both sides of the first protrusion in the circumferential direction of the outer ring fire cover.

[0022] In the present scheme, by setting the first protrusion and the 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, the lower surface of the first protrusion fits the bottom surface of the second groove, and the second protrusion is accommodated in the first groove, the upper surface of the second protrusion fits the bottom surface of the first groove, so that the first fire hole and the second fire hole are respectively formed between the first protrusion and the second protrusions located on both sides of the outer ring fire cover in the circumferential direction. The overall structure of the outer ring fire cover is relatively simple, which is convenient for production and manufacturing, and it is convenient to clean the upper fire cover and the lower fire cover separately after disassembly.

[0023] Preferably, the upper fire cover further comprises a plurality of third protrusions spaced apart along the circumferential direction of the outer ring fire cover, the third protrusions extending downward from the lower end of the upper fire cover body, and a third groove is formed between two adjacent third protrusions;

[0024] The lower fire cover also includes a plurality of fourth protrusions spaced apart along the circumferential direction of the outer ring fire cover, the fourth protrusions extending upward from the upper end of the lower fire cover 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 fits the bottom surface of the fourth groove; the fourth protrusion is accommodated in the third groove, and the upper surface of the fourth protrusion fits the bottom surface of the third groove; the third fire hole and the fourth fire hole are respectively formed between the third protrusion and the fourth protrusions located on both sides of the third protrusion in the circumferential direction of the outer ring fire cover.

[0026] In the present scheme, by setting the third protrusion and the 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, the lower surface of the third protrusion fits the bottom surface of the fourth groove, and the fourth protrusion is accommodated in the third groove, the upper surface of the fourth protrusion fits the bottom surface of the third groove, so that the third fire hole and the fourth fire hole are respectively formed between the third protrusion and the fourth protrusions located on both sides of it in the circumferential direction of the outer ring fire cover. The overall structure of the outer ring fire cover is relatively simple, which is convenient for production and manufacturing, and it is easy to clean the upper fire cover and the lower fire cover after disassembly.

[0027] Preferably, for the first fire hole and the second fire hole arranged adjacent to the first protrusion in the circumferential direction of the outer ring fire cover, the first fire hole is arranged on the side of the second fire hole in the circumferential direction of the outer ring fire cover facing the first direction;

[0028] For the third fire hole and the fourth fire hole arranged adjacent to the third protrusion in the circumferential direction of the outer ring fire cover, the third fire hole is arranged on the side of the fourth fire hole in the circumferential direction of the outer ring fire cover facing the second direction;

[0029] The first direction and the second direction are opposite to each other in the circumferential direction of the outer ring fire cover.

[0030] In the present scheme, by setting the first direction and the second direction in the circumferential direction of the outer ring fire cover to be opposite, the difference in fire hole size between the inner ring fire holes and the outer ring fire holes changes in the opposite way, that is, when the difference in fire hole size between the first fire hole and the second fire hole increases, the difference in fire hole size between the third fire hole and the fourth fire hole decreases, thereby making the overall flame heights of the inner ring fire holes and the outer ring fire holes change in the opposite way. When the inner ring flame becomes larger, the outer ring flame becomes smaller, and conversely, when the inner ring flame becomes smaller, the outer ring flame becomes larger, which is more convenient for adjusting 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 of the outer ring fire cover in the circumferential direction;

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

[0033] In this solution, by setting the first groove and the second groove at both ends of the outer ring fire cover in the circumferential direction as arc shapes, and setting the third groove and the fourth groove at both ends of the outer ring fire cover in the circumferential direction as arc shapes, it is easier to clean the outer ring fire cover after disassembly.

[0034] Preferably, the lower fire cover comprises an inner ring part, an outer ring part and a connecting piece, the second protrusion is arranged on the inner ring part, the fourth protrusion is arranged on the outer ring part, and the two ends of the connecting piece are respectively connected to the inner ring part and the outer ring part.

[0035] In this solution, by setting the lower fire cover as an inner circle part and an outer circle part, and connecting the inner circle part and the outer circle part through a connecting piece, the overall material consumption of the lower fire cover is reduced, the overall weight of the lower fire cover is reduced, the production cost is saved, and it is also easier to clean the lower fire cover.

[0036] Preferably, in the direction from the radial inner side to the radial outer side of the outer ring fire cover, the outer ring fire hole extends obliquely upward;

[0037] And / or, in the direction from the radial outer side to the radial inner side of the outer ring fire cover, the inner ring fire holes extend obliquely upward.

[0038] In this solution, the outer circle fire holes and the inner circle fire holes are arranged to extend obliquely upward, thereby making it easier for the flames to burn the bottom of the pot upward, thereby achieving a better heating effect on the bottom of the pot.

[0039] The positive and progressive effects of the present invention are:

[0040] The inner circle fire hole includes a first fire hole and a second fire hole. When the position of the upper fire cover relative to the lower fire cover changes between the first extreme position and the second extreme position, the difference in the fire hole size of the first fire hole and the second fire hole changes. Since the total amount of the fire hole size of the inner circle fire hole is constant, that is, the total amount of the fire hole size of the first fire hole and the second fire hole is constant, the change in the difference in the fire hole size between the first fire hole and the second fire hole can change the overall flame height of the inner circle fire hole. Specifically, when the fire hole sizes of the first fire hole and the second fire hole are closer, the flame heights of the first fire hole and the second fire hole are closer to the medium level, and the overall flame height of the inner circle fire hole is lower, and when the difference in the fire hole size of the first fire hole and the second fire hole is larger, the flame height of the relatively smaller fire hole in the first fire hole and the second fire hole is higher, which in turn leads to a higher overall flame height of the inner circle fire hole, and the flame is more likely to burn the bottom of the pot. When the upper fire cover rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring fire cover, the first fire hole gradually increases and the second fire hole gradually decreases, thereby changing the difference in size between the first fire hole and the second fire hole, so that the overall flame height of the inner ring fire hole changes, and further changes the heating degree of the inner ring pot bottom, avoiding uneven heating of the food in the pot due to uneven firepower of the inner and outer rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of the outer ring fire cover in the first extreme position according to an embodiment of the present invention.

[0042] Figure 2 It is a schematic diagram of the three-dimensional structure of the outer ring fire cover in the second extreme position according to an embodiment of the present invention.

[0043] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of an outer ring fire cover according to an embodiment of the present invention.

[0044] Figure 4 The figure is a schematic diagram of the three-dimensional structure of the upper fire cover according to an embodiment of the present invention.

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

[0046] Description of reference numerals:

[0047] Outer ring fire cover 100

[0048] Radially inner wall 110

[0049] Radially outer side wall 120

[0050] Fire cover 200

[0051] Lid body 210

[0052] The first protrusion 220

[0053] First groove 230

[0054] The third protrusion 240

[0055] The third groove 250

[0056] Lower fire cover 300

[0057] Lower fire cover body 310

[0058] The second protrusion 320

[0059] Second groove 330

[0060] Fourth protrusion 340

[0061] Fourth groove 350

[0062] Inner circle 360

[0063] Outer ring part 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] The third fire hole 510

[0070] Fourth fire hole 520

[0071] The first direction a

[0072] The second direction b DETAILED DESCRIPTION

[0073] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the following examples.

[0074] like Figure 1 and Figure 2As shown, this embodiment provides an outer ring fire cover 100, which includes an upper fire cover 200 and a lower fire cover 300. The upper fire cover 200 is covered on the lower fire cover 300 to form an inner ring fire hole 400, and the inner ring fire hole 400 is located on the radial inner side wall 110 of the outer ring fire cover 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 length of the flame is longer, the flame is closer to the bottom of the pot, and the pot is more easily heated.

[0076] The inner ring fire hole 400 includes a first fire hole 410 and a second fire hole 420. In the circumferential direction of the outer ring fire cover 100, the upper fire cover 200 can rotate between a first limit position and a second limit position relative to the lower fire cover 300 to change the difference in fire hole size between the first fire hole 410 and the second fire hole 420. Since the total amount of fire hole sizes of the inner ring fire holes 400 is constant, that is, the total amount of fire hole sizes of the first fire holes 410 and the second fire holes 420 is constant, the change in the difference in fire hole size between the first fire hole 410 and the second fire hole 420 can change the overall flame height of the inner ring fire holes 400. Specifically, when the fire hole sizes of the first fire hole 410 and the second fire hole 420 are closer, the flame heights of the first fire hole 410 and the second fire hole 420 are closer to the medium level, and the overall flame height of the inner circle fire holes 400 is lower. When the difference in fire hole sizes of the first fire hole 410 and the second fire hole 420 is greater, the flame height of the relatively smaller fire hole in the first fire hole 410 and the second fire hole 420 is higher, which in turn causes the overall flame height of the inner circle fire holes 400 to be higher, and the flame is more likely to burn the bottom of the pot.

[0077] When the upper fire cover 200 rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring fire cover 100, the first fire hole 410 gradually increases and the second fire hole 420 gradually decreases, thereby changing the difference in size between the first fire hole 410 and the second fire hole 420, so that the overall flame height of the inner ring fire hole 400 changes, thereby changing the heating degree of the inner ring pot bottom, avoiding uneven heating of the food in the pot due to uneven firepower of the inner and outer rings.

[0078] The upper fire cover 200 is covered on the lower fire cover 300 to form an outer ring fire hole 500, and the outer ring fire hole 500 is located on the radial outer side wall 120 of the outer ring fire cover 100. The outer ring fire hole includes a third fire hole 510 and a fourth fire hole 520. When the upper fire cover 200 rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring fire cover 100, the third fire hole 510 gradually decreases and the fourth fire hole 520 gradually increases, thereby changing the difference in the size of the third fire hole 510 and the fourth fire hole 520, so that the overall flame height of the outer ring fire hole 500 changes, thereby changing the degree of heating of the outer ring pot bottom, and adjusting the outer ring fire power while adjusting the inner ring fire power, further improving the effect of adjusting the fire power of the outer ring fire cover 100.

[0079] like Figure 1 As shown, in the first extreme position, the fire hole sizes of the first fire hole 410 and the second fire hole 420 are equal, the flame heights of the first fire hole 410 and the second fire hole 420 are equal, and the overall flame height of the inner ring fire hole 400 is relatively low, which reduces the heating of the inner ring of the pot. The third fire hole 510 is in the maximum state, and the fourth fire hole 520 is in the minimum state. The flame height of the third fire hole 510 is relatively low, and the flame height of the fourth fire hole 520 is relatively high. The outer ring fire hole 500 increases the difference in the fire hole size between the third fire hole 510 and the fourth fire hole 520, thereby making the partial flame height higher. The overall flame height of the outer ring fire hole 500 is higher, making it easier to heat the bottom of the pot located in the outer ring, thereby supplementing the heat obtained by the outer ring of the pot.

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

[0081] As shown in Figure 1, the first fire hole 410 and the second fire hole 420 are arranged alternately and spaced along the circumference of the outer ring fire cover 100, so that the flames of the inner ring fire hole 400 are more balanced in the circumference of the outer ring fire cover 100, and the inner ring of the pot is heated more evenly. Similarly, the third fire hole 510 and the fourth fire hole 520 are arranged alternately and spaced along the circumference of the outer ring fire cover 100, so that the flames of the outer ring fire hole 500 are more balanced in the circumference of the outer ring fire cover 100, and the outer ring of the pot is heated more evenly.

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

[0083] The first protrusion 220 is accommodated in the second groove 330, and the lower surface of the first protrusion 220 fits the bottom surface of the second groove 330. The second protrusion 320 is accommodated in the first groove 230, and the upper surface of the second protrusion 320 fits the bottom surface of the first groove 230. The first protrusion 220 and the second protrusions 320 located on both sides of the outer ring fire cover 100 in the circumferential direction form a first fire hole 410 and a second fire hole 420, respectively, so that the overall structure of the outer ring fire cover 100 is relatively simple, convenient for production and manufacturing, and easy to clean the upper fire cover 200 and the lower fire cover 300 after disassembly.

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

[0085] The third protrusion 240 is accommodated in the fourth groove 350, and the lower surface of the third protrusion 240 fits the bottom surface of the fourth groove 350. The fourth protrusion 340 is accommodated in the third groove 250, and the upper surface of the fourth protrusion 340 fits the bottom surface of the third groove 250. The third fire hole 510 and the fourth fire hole 520 are respectively formed between the third protrusion 240 and the fourth protrusions 340 located on both sides of the third protrusion 240 in the circumferential direction of the outer ring fire cover 100, so that the overall structure of the outer ring fire cover 100 is relatively simple, convenient for production and manufacturing, and easy to clean the upper fire cover 200 and the lower fire cover 300 after disassembly.

[0086] like Figure 1As shown, for the first fire hole 410 and the second fire hole 420 disposed adjacent to the first protrusion 220 in the circumferential direction of the outer ring fire cover 100, the first fire hole 410 is disposed on the side of the second fire hole 420 facing the first direction a in the circumferential direction of the outer ring fire cover 100. For the third fire hole 510 and the fourth fire hole 520 disposed adjacent to the third protrusion 240 in the circumferential direction of the outer ring fire cover 100, the third fire hole 510 is disposed on the side of the fourth fire hole 520 facing the second direction b in the circumferential direction of the outer ring fire cover 100. The first direction a and the second direction b are opposite in the circumferential direction of the outer ring fire cover 100, so that the difference in fire hole size between the inner ring fire hole 400 and the outer ring fire hole 500 changes in the opposite direction, that is, when the difference in fire hole size between the first fire hole 410 and the second fire hole 420 increases, the difference in fire hole size between the third fire hole 510 and the fourth fire hole 520 decreases, thereby making the overall flame height of the inner ring fire hole 400 and the outer ring fire hole 500 change in the opposite direction. When the inner ring flame becomes larger, the outer ring flame becomes smaller, and conversely, when the inner ring flame becomes smaller, the outer ring flame becomes larger, which is more convenient for adjusting 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 fire cover 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 fire cover 100, which makes it easier to clean the outer ring fire cover 100 after disassembly.

[0088] like Figure 5 As shown, the lower fire cover 300 includes an inner ring portion 360, an outer ring portion 370 and a connecting member 380, the second protrusion 320 is provided on the inner ring portion 360, the fourth protrusion 340 is provided on the outer ring portion 370, and the two ends of the connecting member 380 are respectively connected to the inner ring portion 360 and the outer ring portion 370. By configuring the lower fire cover 300 as the inner ring portion 360 and the outer ring portion 370, and connecting the inner ring portion 360 and the outer ring portion 370 through the connecting member 380, the overall material amount of the lower fire cover 300 is reduced, the overall weight of the lower fire cover 300 is reduced, the production cost is saved, and it is also more convenient to clean the lower fire cover 300.

[0089] like Figure 3 As shown, the outer ring fire hole 500 extends obliquely upward in the direction from the radial inner side to the radial outer side of the outer ring fire cover 100. The inner ring fire hole 400 extends obliquely upward in the direction from the radial outer side to the radial inner side of the outer ring fire cover 100. By setting the outer ring fire hole 500 and the inner ring fire hole 400 to extend obliquely upward, it is easier for the flame to burn upward and burn the bottom of the pot, so that the heating effect of the bottom of the pot is better.

[0090] 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.

[0091] 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. An outer ring fire cover, characterized in that: The outer ring fire cover comprises an upper fire cover and a lower fire cover, wherein the upper fire cover is covered on the lower fire cover to form an inner ring fire hole, and the inner ring fire hole is located on the radial inner side wall of the outer ring fire cover; The inner ring fire hole includes a first fire hole and a second fire hole. In the circumferential direction of the outer ring fire cover, the upper fire cover can rotate relative to the lower fire cover between a first limit position and a second limit position to change the difference in fire hole size between the first fire hole and the second fire hole. When the upper fire cover rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring fire cover, the first fire hole gradually increases, and the second fire hole gradually decreases.

2. The outer ring fire cover according to claim 1, characterized in that: The upper fire cover is covered on the lower fire cover to form an outer ring fire hole, and the outer ring fire hole is located on the radial outer side wall of the outer ring fire cover; The outer ring fire hole includes a third fire hole and a fourth fire hole. When the upper fire cover rotates from the first extreme position to the second extreme position along the circumferential direction of the outer ring fire cover, the third fire hole gradually decreases and the fourth fire hole gradually increases.

3. The outer ring fire cover according to claim 2, characterized in that: When in the first extreme position, the first fire hole and the second fire hole are equal in size, the third fire hole is in the maximum state, and the fourth fire hole is in the minimum state; When in the second extreme position, the first fire hole is in the maximum state, the second fire hole is in the minimum state, and the sizes of the third fire hole and the fourth fire hole are equal.

4. The outer ring fire cover according to claim 2, characterized in that: The first fire holes and the second fire holes are arranged alternately and spaced along the circumference of the outer ring fire cover; The third fire holes and the fourth fire holes are arranged alternately and spaced along the circumference of the outer ring fire cover.

5. The outer ring fire cover according to claim 4, characterized in that: The upper fire cover comprises an upper fire cover body and a plurality of first protrusions spaced apart along the circumferential direction of the outer ring fire cover, the first protrusions extending downward from the lower end of the upper fire cover body, and a first groove is formed between two adjacent first protrusions; The lower fire cover is provided with a lower fire cover body and a plurality of second protrusions spaced apart along the circumferential direction of the outer ring fire cover, the second protrusions extending upward from the upper end of the lower fire cover 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 fits the bottom surface of the second groove; the second protrusion is accommodated in the first groove, and the upper surface of the second protrusion fits the bottom surface of the first groove; the first fire hole and the second fire hole are respectively formed between the first protrusion and the second protrusions located on both sides of the first protrusion in the circumferential direction of the outer ring fire cover.

6. The outer ring fire cover according to claim 5, characterized in that: The upper fire cover also includes a plurality of third protrusions spaced apart along the circumferential direction of the outer ring fire cover, the third protrusions extending downward from the lower end of the upper fire cover body, and a third groove is formed between two adjacent third protrusions; The lower fire cover also includes a plurality of fourth protrusions spaced apart along the circumferential direction of the outer ring fire cover, the fourth protrusions extending upward from the upper end of the lower fire cover 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 fits the bottom surface of the fourth groove; the fourth protrusion is accommodated in the third groove, and the upper surface of the fourth protrusion fits the bottom surface of the third groove; the third fire hole and the fourth fire hole are respectively formed between the third protrusion and the fourth protrusions located on both sides of the third protrusion in the circumferential direction of the outer ring fire cover.

7. The outer ring fire cover according to claim 6, characterized in that: For the first fire hole and the second fire hole which are arranged adjacent to the first protrusion in the circumferential direction of the outer ring fire cover, the first fire hole is arranged on the side of the second fire hole in the circumferential direction of the outer ring fire cover facing the first direction; For the third fire hole and the fourth fire hole arranged adjacent to the third protrusion in the circumferential direction of the outer ring fire cover, the third fire hole is arranged on the side of the fourth fire hole in the circumferential direction of the outer ring fire cover facing the second direction; The first direction and the second direction are opposite to each other in the circumferential direction of the outer ring fire cover.

8. The outer ring fire cover according to claim 6, characterized in that: The first groove and the second groove are arc-shaped at both ends of the outer ring fire cover in the circumferential direction; And / or, the third groove and the fourth groove are arc-shaped at both ends of the outer ring fire cover in the circumferential direction.

9. The outer ring fire cover according to claim 6, characterized in that: The lower fire cover includes an inner ring part, an outer ring part and a connecting piece, the second protrusion is arranged on the inner ring part, the fourth protrusion is arranged on the outer ring part, and the two ends of the connecting piece are respectively connected to the inner ring part and the outer ring part.

10. The outer ring fire cover according to claim 2, characterized in that: In the direction from the radial inner side to the radial outer side of the outer ring fire cover, the outer ring fire hole extends obliquely upward; And / or, in the direction from the radial outer side to the radial inner side of the outer ring fire cover, the inner ring fire holes extend obliquely upward.

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