Upper air inlet annular fire burner

Abstract

The invention discloses an upper air inlet annular fire burner, which belongs to the technical field of gas cookers and comprises an upper air inlet ejector, a top cover, a base and an annular fire cover. An air inlet pipe is arranged on the lower side of the base and is communicated with the upper air inlet ejector; the top cover is arranged on the upper side of the base to form a premixing cavity, and an air inlet gap is formed between the inner side of the top cover and the base; the lower side of the annular fire cover is connected with the base, an annular fire channel is formed between the annular fire cover and the top cover, the annular fire channel is communicated with the air inlet gap, and an annular fire hole is formed in the end, away from the air inlet gap, of the annular fire channel. The top cover is provided with air passing holes which are rotationally symmetrical and evenly distributed, and the premixing cavity is communicated with the annular fire channel through the air passing holes. The upper air inlet annular fire combustor solves the problem that an existing combustor is insufficient in combustion.

Description

Technical Field

[0001] The invention relates to the technical field of gas cookers, and in particular to an upper air inlet annular fire burner. Background Art

[0002] The existing burners have two combustion modes: straight fire and annular fire. The annular fire burns close to the bottom of the pot, forming a rotating fire surface. The annular fire has a large combustion area, relatively high thermal efficiency, fast heating, and relatively concentrated firepower. For annular fire burners, the following problems are common: insufficient air enters the premixing chamber, resulting in insufficient premixing of the gas, which leads to incomplete combustion. Summary of the invention

[0003] In order to overcome the defects of the prior art, the present invention provides an upper air inlet annular fire burner to solve the above-mentioned problems.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an upper air inlet annular fire burner, comprising an upper air inlet ejector, a top cover, a base and an annular fire cover; an air inlet pipe is arranged on the lower side of the base, and the air inlet pipe is connected with the upper air inlet ejector; The top cover is arranged on the upper side of the base to form a premixing chamber, and an air intake gap is formed between the inner side of the top cover and the base; The lower side of the annular fire cover is connected to the base, an annular fire channel is formed between the annular fire cover and the top cover, the annular fire channel is connected to the air intake gap, and an annular fire hole is provided at one end of the annular fire channel away from the air intake gap; The top cover is provided with rotationally symmetrical and evenly distributed air holes, and the premixing chamber is connected with the annular fire channel through the air holes.

[0005] Preferably, an annular circulation channel is provided on the upper side of the base, and the base cooperates with the annular fire cover through the annular circulation channel to form a premixing chamber with an annular structure.

[0006] Optionally, an air intake groove is also provided on the upper side of the base, and the air intake groove is recessed downward relative to the annular circulation channel. One end of the air intake groove is connected to the annular circulation channel, and the other end of the air intake groove is provided with an annular fire air intake hole, and the annular fire air intake hole is connected to the air intake pipe.

[0007] Specifically, the top cover is provided with a shielding portion extending downward, and the air intake gap is formed between the shielding portion and the base.

[0008] It is worth noting that the wall surface of the annular fire cover and the wall surface of the top cover that form the annular fire channel are inclined from bottom to top and from inside to outside, and the air holes are opened on the inclined wall surface of the top cover.

[0009] Specifically, a central fire cover is provided in the middle of the base, and the inner cavity of the central fire cover is connected to the air inlet pipe through the central fire air inlet hole in the middle of the base.

[0010] Preferably, the center fire cover is provided with upper inclined holes and lower inclined holes, wherein the upper inclined holes are evenly distributed on the circumferential wall surface of the center fire cover, the lower inclined holes are evenly distributed on the circumferential wall surface of the center fire cover, and the upper inclined holes are located above the lower inclined holes.

[0011] Specifically, the upper inclined hole is an inclined structure from bottom to top and from inside to outside.

[0012] Optionally, the lower inclined hole includes a vertical channel and an inclined channel, one end of the vertical channel is connected to the inner cavity of the center fire cover, the other end of the vertical channel is connected to one end of the inclined channel, and the other end of the inclined channel extends obliquely from bottom to top and from inside to outside; the circumferential outer wall of the center fire cover is provided with a shielding inclined surface between the upper inclined hole and the lower inclined hole to shield the upper side of the inclined channel.

[0013] The beneficial effect of the present invention is that in the upper air inlet annular fire burner, the gas enters the premixing chamber through the upper air inlet ejector and the air inlet pipe, mixes with the air, and is ignited after being output from the air hole. The air hole is a torn shutter type, and the gas enters from the lower side, passes through the air hole, and then exits from the upper side, thereby forming an annular fire in the annular fire channel, and then outputs from the annular fire hole. In this process, the air outside the burner can also enter the premixing chamber through the annular fire hole, the annular fire channel and the air inlet gap in sequence, ensuring that the air in the premixing chamber is sufficient, thereby ensuring that the gas and air are sufficiently premixed, so that the combustion is more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an upper air inlet annular fire burner in one embodiment of the present invention; Figure 2 A cross-sectional view of an upper air inlet annular fire burner according to an embodiment of the present invention; Figure 3 for Figure 2 An enlarged schematic diagram of a dotted circle A; Figure 4 A schematic diagram of the structure of a top cover in one embodiment of the present invention; Figure 5 It is a structural schematic diagram of a base in one embodiment of the present invention; Figure 6 It is a structural schematic diagram of a base in another embodiment of the present invention; Figure 7 It is a schematic structural diagram of a center fire cover in one embodiment of the present invention; Figure 8A cross-sectional view of a center fire cover in one embodiment of the present invention; In the figure: 1 upper air inlet ejector; 2 top cover; 21 air hole; 22 air inlet gap; 23 shielding part; 3 base; 31 air inlet pipe; 32 annular circulation channel; 33 air inlet groove; 34 annular fire air inlet hole; 35 center fire air inlet hole; 4 annular fire cover; 5 center fire cover; 51 upper inclined hole; 52 lower inclined hole; 521 vertical channel; 522 inclined channel; 53 shielding slope; 7 annular fire channel; 8 annular fire hole; 9 premixing chamber. DETAILED DESCRIPTION

[0015] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] like Figure 1-8 As shown, an upper air inlet annular fire burner comprises an upper air inlet ejector 1, a top cover 2, a base 3 and an annular fire cover 4; an air inlet pipe 31 is provided on the lower side of the base 3, and the air inlet pipe 31 is communicated with the upper air inlet ejector 1; like Figure 2 and 3 As shown, the top cover 2 is arranged on the upper side of the base 3 to form a premixing chamber 9, and an air intake gap 22 is formed between the inner side of the top cover 2 and the base 3; The lower side of the annular fire cover 4 is connected to the base 3, an annular fire channel 7 is formed between the annular fire cover 4 and the top cover 2, the annular fire channel 7 is connected to the air intake gap 22, and an annular fire hole 8 is provided at one end of the annular fire channel 7 away from the air intake gap 22; The top cover 2 is provided with rotationally symmetrical and evenly distributed air holes 21 , and the premixing chamber 9 is connected with the annular fire channel 7 through the air holes 21 .

[0017] In the upper air intake annular fire burner, the gas enters the premixing chamber 9 through the upper air intake ejector 1 and the air intake pipe 31, mixes with the air, and is ignited after being output from the air hole 21. Figure 4 As shown, the air hole 21 is a torn shutter type, and the gas enters from the lower side, passes through the air hole 21, and then exits from the upper side thereof, thereby forming an annular fire in the annular fire channel 7, and then outputs from the annular fire hole 8. In this process, the air outside the burner can also enter the premixing chamber 9 through the annular fire hole 8, the annular fire channel 7 and the air intake gap 22 in sequence, ensuring that the air in the premixing chamber 9 is sufficient, thereby ensuring that the gas and air are sufficiently premixed, so that the combustion is more complete.

[0018] Preferably, Figure 5 As shown, the upper side of the base 3 is provided with an annular circulation channel 32, and the base 3 cooperates with the annular fire cover 4 through the annular circulation channel 32 to form an annular premixing chamber 9. After the gas enters the premixing chamber 9 from the air inlet pipe 31, it will move forward along the annular circulation channel 32 to form a cycle before passing through the air hole 21. The forward direction of the gas is Figure 5 In the direction of the arrow, rotation is achieved, which is more conducive to the formation of a ring fire.

[0019] Optional, such as Figure 5 and 6 As shown, an air intake groove 33 is also provided on the upper side of the base 3, and the air intake groove 33 is recessed downward relative to the annular circulation channel 32. One end of the air intake groove 33 is connected to the annular circulation channel 32, and the other end of the air intake groove 33 is provided with an annular fire air intake hole 34, and the annular fire air intake hole 34 is connected to the air intake pipe 31.

[0020] The gas inlet groove 33 extends along the length direction of the annular circulation channel 32. After the gas enters from the other end of the gas inlet groove 33, it slowly rises along the slope of the gas inlet groove 33 and finally enters the annular circulation channel 32. At this time, the gas continues to flow along the length direction of the annular circulation channel 32. The gas inlet groove 33 plays a guiding role, so that the gas can enter the annular circulation channel 32 according to the extension direction designed by the gas inlet groove 33, so that the gas flow rotates. After the gas enters the annular circulation channel 32, since the gas inlet groove 33 is recessed downward relative to the annular circulation channel 32, it will not affect the flow of the gas in the annular circulation channel 32. In this embodiment, two gas inlet grooves 33 are provided on the upper side of the base 3, and the two gas inlet grooves 33 extend along the length direction of one annular circulation channel 32, thereby increasing the intake amount.

[0021] Specifically, if Figure 3 As shown, the top cover 2 is provided with a shielding portion 23 extending downward, and the air intake gap 22 is formed between the shielding portion 23 and the base 3. After the shielding portion 23 is provided, the mixed gas is restricted from flowing from the air intake gap 22 to the annular fire channel 7, so that the mixed gas is concentrated to the air hole 21, and flows from the air hole 21 to the annular fire channel 7, thereby ensuring that the air intake gap 22 is unobstructed.

[0022] It is worth noting that if Figure 2 and 3As shown, the wall surface of the annular fire cover 4 and the wall surface of the top cover 2 that form the annular fire channel 7 are inclined from bottom to top and from inside to outside, and the air hole 21 is opened on the inclined wall surface of the top cover 2. After the mixed gas passes through the air hole 21, it will first hit the wall surface of the top cover 2, thereby reducing the flow speed of the mixed gas. After being ignited, it can prevent the flame from directly escaping from the annular fire hole 8, making the flame more stable.

[0023] Specifically, Figure 2 As shown, a central fire cover 5 is provided in the middle of the base 3, and the inner cavity of the central fire cover 5 is connected to the air inlet pipe 31 through the central fire air inlet hole 35 in the middle of the base 3. There is also a gap between the central fire cover 5 and the annular fire cover 4 to facilitate the flow and replenishment of secondary air, and both fire covers can burn normally without affecting each other.

[0024] Optional, such as Figure 7 and 8 As shown, the center fire cover 5 is provided with upper inclined holes 51 and lower inclined holes 52, wherein the upper inclined holes 51 are evenly distributed on the circumferential wall of the center fire cover 5, and the lower inclined holes 52 are evenly distributed on the circumferential wall of the center fire cover 5, and the upper inclined holes 51 are located above the lower inclined holes 52. After the gas is introduced and mixed with the air in the inner cavity of the center fire cover 5, the mixed gas can be output from the upper inclined holes 51 and the lower inclined holes 52 and ignited, forming a double flame.

[0025] Preferably, the upper inclined hole 51 is an inclined structure from bottom to top and from inside to outside, so as to increase the coverage area of ​​the flame and facilitate heating.

[0026] It is worth noting that the lower inclined hole 52 includes a vertical channel 521 and an inclined channel 522, one end of the vertical channel 521 is connected to the inner cavity of the central fire cover 5, the other end of the vertical channel 521 is connected to one end of the inclined channel 522, and the other end of the inclined channel 522 extends obliquely from bottom to top and from inside to outside; the circumferential outer wall of the central fire cover 5 is provided with a shielding inclined surface 53 between the upper inclined hole 51 and the lower inclined hole 52 to shield the upper side of the inclined channel 522. The mixed gas first passes through the vertical channel 521, collides with the shielding inclined surface 53, and then enters the inclined channel 522, thereby reducing the flow speed of the mixed gas. After being ignited, it can prevent the flame from directly escaping from the orifice of the lower inclined hole 52, making the flame more stable. By providing the shielding inclined surface 53, the upper inclined hole 51 and the lower inclined hole 52 can be separated, and the flames from the upper inclined hole 51 and the lower inclined hole 52 can be prevented from mixing together.

[0027] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An upper air inlet annular fire burner, characterized in that: It includes an upper air inlet ejector, a top cover, a base and an annular fire cover; an air inlet pipe is provided on the lower side of the base, and the air inlet pipe is connected with the upper air inlet ejector; The top cover is arranged on the upper side of the base to form a premixing chamber, and an air intake gap is formed between the inner side of the top cover and the base; The lower side of the annular fire cover is connected to the base, an annular fire channel is formed between the annular fire cover and the top cover, the annular fire channel is connected to the air intake gap, and an annular fire hole is provided at one end of the annular fire channel away from the air intake gap; The top cover is provided with rotationally symmetrical and evenly distributed air holes, and the premixing chamber is connected with the annular fire channel through the air holes.

2. The upward air inlet annular fire burner according to claim 1, characterized in that: An annular circulation channel is arranged on the upper side of the base, and the base cooperates with the annular fire cover through the annular circulation channel to form a premixing chamber with an annular structure.

3. The upward air inlet annular fire burner according to claim 2, characterized in that: An air intake groove is also provided on the upper side of the base, and the air intake groove is recessed downward relative to the annular circulation channel. One end of the air intake groove is connected to the annular circulation channel, and the other end of the air intake groove is provided with an annular fire air intake hole, and the annular fire air intake hole is connected to the air intake pipe.

4. The upward air inlet annular fire burner according to claim 1, characterized in that: The top cover is provided with a shielding portion extending downward, and the air intake gap is formed between the shielding portion and the base.

5. The upward air inlet annular fire burner according to claim 1, characterized in that: The wall surface of the annular fire cover and the wall surface of the top cover that form the annular fire channel are both inclined from bottom to top and from inside to outside, and the air holes are opened on the inclined wall surface of the top cover.

6. The upward air inlet annular fire burner according to claim 1, characterized in that: A central fire cover is arranged in the middle of the base, and an inner cavity of the central fire cover is connected with the air inlet pipe through a central fire air inlet hole in the middle of the base.

7. The upward air inlet annular fire burner according to claim 6, characterized in that: The center fire cover is provided with upper inclined holes and lower inclined holes, wherein the upper inclined holes are evenly distributed on the circumferential wall surface of the center fire cover, and the lower inclined holes are evenly distributed on the circumferential wall surface of the center fire cover, and the upper inclined holes are located above the lower inclined holes.

8. The upward air inlet annular fire burner according to claim 7, characterized in that: The upper inclined hole is an inclined structure from bottom to top and from inside to outside.

9. The upward air inlet annular fire burner according to claim 7, characterized in that: The lower inclined hole includes a vertical channel and an inclined channel, one end of the vertical channel is connected to the inner cavity of the center fire cover, the other end of the vertical channel is connected to one end of the inclined channel, and the other end of the inclined channel extends obliquely from bottom to top and from inside to outside; the circumferential outer wall of the center fire cover is provided with a shielding inclined surface between the upper inclined hole and the lower inclined hole to shield the upper side of the inclined channel.

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