Lower air inlet annular fire burner

Abstract

The invention discloses a lower air inlet annular fire burner, and belongs to the technical field of gas cooking appliances, the lower air inlet annular fire burner comprises a lower air inlet ejector, a top cover, a base and an annular fire cover, the lower side of the base is provided with a first air inlet, and the first air inlet is communicated with the lower air inlet ejector; the top cover is arranged on the upper side of the base to form a premixing cavity; the lower side of the annular fire cover is connected with the base, and an annular fire channel is formed between the annular fire cover and the top cover; the top cover is provided with air passing holes which are rotationally symmetrical and are uniformly distributed, and the premixing cavity is communicated with the annular fire channel through the air passing holes; the lower air inlet annular fire burner solves the problem that an existing burner is poor in fire outlet effect.

Description

Technical Field

[0001] The invention relates to the technical field of gas cookers, and in particular to a bottom-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 fire. In the existing annular fire burner, the gas is immediately ignited after being input from the air inlet and then forms an annular fire in the annular fire channel. In this case, the gas and air are not fully mixed, resulting in poor combustion effect. Summary of the invention

[0003] In order to overcome the defects of the prior art, the present invention provides a bottom 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: a lower air inlet annular fire burner, comprising a lower air inlet ejector, a top cover, a base and an annular fire cover, wherein a first air inlet is provided on the lower side of the base, and the first air inlet is connected to the lower air inlet ejector; The top cover is arranged on the upper side of the base to form a premixing chamber; the lower side of the annular fire cover is connected to the base, and an annular fire channel is formed between the annular fire cover and the top cover; 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, in the top cover, the width of the air holes arranged at the position toward which the first air inlet is directed is smaller than the width of the air holes at other positions of the top cover.

[0006] It is worth noting that an annular channel is provided on the upper side of the base, and the base cooperates with the annular fire cover through the annular channel to form a premixing chamber with an annular structure.

[0007] Preferably, an air inlet groove is further provided on the upper side of the base, the air inlet groove is recessed downward relative to the annular channel, and the first air inlet is arranged at the bottom of the air inlet groove.

[0008] Optionally, it also includes a central fire cover, a second air inlet is provided in the middle of the base, the lower side of the second air inlet is connected to the lower air inlet ejector, and the upper side of the second air inlet is connected to the central fire cover.

[0009] Specifically, the central fire cover is provided with a first inclined hole and a second inclined hole penetrating through its own circumferential wall surface, and the first inclined hole and the second inclined hole are inclined from bottom to top and from inside to outside.

[0010] Preferably, the first inclined hole is located on the upper side of the second inclined hole, a plurality of first inclined holes are evenly distributed along the circumferential direction of the center fire cover, a plurality of second inclined holes are evenly distributed along the circumferential direction of the center fire cover, and the first inclined holes and the second inclined holes are staggered in the up and down directions.

[0011] Optionally, 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.

[0012] The beneficial effect of the present invention is that in the down-air-inlet annular fire burner, the gas is input from the first air inlet into the premixing chamber through the down-air-inlet ejector. After the gas enters the premixing chamber, the gas can be fully mixed with the air in the premixing chamber, and then the mixed gas is output to the annular fire channel and ignited, thereby forming an annular fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 An exploded view of a bottom air inlet annular fire burner in one embodiment of the present invention; Figure 2 It is a structural schematic diagram of a bottom air inlet annular fire burner in one embodiment of the present invention; Figure 3 A schematic diagram of the structure of a top cover in one embodiment of the present invention; Figure 4 It is a structural schematic diagram of a base in one embodiment of the present invention; Figure 5 It is a schematic structural diagram of a center fire cover in one embodiment of the present invention; Figure 6 A cross-sectional view of a bottom air inlet annular fire burner in one embodiment of the present invention; Figure 7 A top view of a base in one embodiment of the present invention; In the figure: 1 lower air inlet ejector; 2 top cover; 21 air hole; 3 base; 31 first air inlet; 32 annular channel; 33 air inlet groove; 35 second air inlet; 4 annular fire cover; 5 center fire cover; 51 first inclined hole; 52 second inclined hole; 6 premixing chamber; 7 annular fire channel; 8 auxiliary dotted line. DETAILED DESCRIPTION

[0014] 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.

[0015] like Figure 1-7As shown, a lower air inlet annular fire burner comprises a lower air inlet ejector 1, a top cover 2, a base 3 and an annular fire cover 4, wherein a first air inlet 31 is provided on the lower side of the base 3, and the first air inlet 31 is communicated with the lower air inlet ejector 1; like Figure 1 and 6 As shown, the top cover 2 is arranged on the upper side of the base 3 to form a premixing chamber 6; the lower side of the annular fire cover 4 is connected to the base 3, and an annular fire channel 7 is formed between the annular fire cover 4 and the top cover 2; the top cover 2 is distributed with air holes 21, and the premixing chamber 6 is connected with the annular fire channel 7 through the air holes 21.

[0016] In the down-air annular fire burner, the gas is input from the first air inlet to the premixing chamber through the down-air injector. After the gas enters the premixing chamber, the gas can be fully mixed with the air in the premixing chamber, and then the mixed gas is output to the annular fire channel and ignited, thereby forming an annular fire.

[0017] Specifically, in the top cover 2 , the width of the air hole 21 disposed at the position toward which the first air inlet 31 faces is smaller than the width of the air hole 21 at other positions of the top cover 2 . The gas is input from the first air inlet 31 to the premixing chamber 6 through the lower air inlet ejector 1. After the gas enters the premixing chamber 6, since the gas is input perpendicular to the base 3, after the gas enters, the gas will first contact the air hole 21 set at the position toward which the first air inlet 31 is directed. In the top cover 2, since the width of the air hole 21 set at the position toward which the first air inlet 31 is directed is smaller than the width of the air hole 21 set at the position not toward which the first air inlet 31 is directed, the gas flowing through the air hole 21 at this position will be relatively small, thereby avoiding excessive gas from directly flowing through the air hole 21 set at the position toward which the first air inlet 31 is directed, and a part of the gas will change direction after colliding with the edge wall of the air hole 21 set at the position toward which the first air inlet 31 is directed, and after changing direction, it can move along the premixing chamber 6 to form a circulation, thereby increasing the flow time of the gas in the premixing chamber 6, so that the gas can be fully mixed with the air in the premixing chamber 6. After the gas and air are fully mixed, they flow through the gas holes 21 to the annular fire channel 7. Figure 3 As shown, the air hole 21 is of 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.

[0018] It is worth noting that if Figure 1 and 4As shown, an annular channel 32 is provided on the upper side of the base 3, and the base 3 cooperates with the annular fire cover 4 through the annular channel 32 to form an annular premixing chamber 6. After the gas enters the premixing chamber 6 and collides with the edge wall of the corresponding gas hole 21 to change direction, the gas can flow along the annular channel 32, promoting the gas to form a circular flow, preparing for the formation of an annular flame.

[0019] Optional, such as Figure 4 As shown, the upper side of the base 3 is also provided with an air intake groove 33, which is recessed downward relative to the annular channel 32, and the first air inlet 31 is arranged at the bottom of the air intake groove 33. The air intake groove 33 extends along the length direction of the annular channel 32. After the gas enters from the bottom of the air intake groove 33, it slowly rises along the slope of the air intake groove 33 and finally enters the annular channel 32. At this time, the gas continues to flow along the length direction of the annular channel 32. The air intake groove 33 plays a guiding role, so that the gas can enter the annular channel 32 according to the extension direction designed by the air intake groove 33, so that the gas flow rotates. After the gas enters the annular channel 32, since the air intake groove 33 is recessed downward relative to the annular channel 32, it will not affect the flow of the gas in the annular channel 32.

[0020] like Figure 7 As shown, the edges of both sides of the first air inlet 31 form auxiliary dotted lines 8 that coincide with the diameter of the circle where the annular channel 32 is located, and a fan-shaped shape is formed between the two auxiliary dotted lines 8. After the top cover 2 is installed on the base 3, when viewed from a top view, the position where the top cover 2 falls into the fan-shaped shape can be used as the position facing the first air inlet 31. Therefore, in this embodiment, after the top cover 2 is installed on the base 3, when viewed from a top view, the width of the air hole 21 framed by the fan-shaped shape will be smaller than the width of the air hole 21 outside the fan-shaped shape. Among them, the air hole 21 set at the position facing the first air inlet 31 is the air hole 21 framed by the fan-shaped shape, and the air holes 21 at other positions of the top cover are the air holes 21 outside the fan-shaped shape.

[0021] Optional, such as Figure 1 , 5 As shown in Figure 6, it also includes a central fire cover 5. A second air inlet 35 is provided in the middle of the base 3. The lower side of the second air inlet 35 is connected to the lower air inlet ejector 1, and the upper side of the second air inlet 35 is connected to the central fire cover 5. A gap is left between the central fire cover 5 and the annular fire cover 4 to facilitate the flow and replenishment of secondary air. Both fire covers can burn normally without affecting each other.

[0022] It is worth noting that if Figure 5As shown, the central fire cover 5 is provided with a first inclined hole 51 and a second inclined hole 52 penetrating its own circumferential wall, and the first inclined hole 51 and the second inclined hole 52 are inclined from bottom to top and from inside to outside. After the gas is introduced and mixed with the air in the inner cavity of the central fire cover 5, the mixed gas can be output from the first inclined hole 51 and the second inclined hole 52 and ignited, forming a double flame, and the flame spreads outward.

[0023] Specifically, the first inclined hole 51 is located above the second inclined hole 52, a plurality of first inclined holes 51 are evenly distributed along the circumference of the central fire cover 5, a plurality of second inclined holes 52 are evenly distributed along the circumference of the central fire cover 5, and the first inclined holes 51 and the second inclined holes 52 are staggered in the vertical direction. By staggered distribution, the coverage of the flame can be increased, thereby increasing the uniformity of heating.

[0024] Preferably, Figure 6 As 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, making the flame more stable.

[0025] 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. A bottom-inlet annular fire burner, characterized in that: It comprises a lower air inlet ejector, a top cover, a base and an annular fire cover, wherein a first air inlet is provided on the lower side of the base, and the first air inlet is communicated with the lower air inlet ejector; The top cover is arranged on the upper side of the base to form a premixing chamber; the lower side of the annular fire cover is connected to the base, and an annular fire channel is formed between the annular fire cover and the top cover; 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. A downward air inlet annular fire burner according to claim 1, characterized in that: In the top cover, the width of the air hole provided at the position toward which the first air inlet is directed is smaller than the width of the air hole at other positions of the top cover.

3. The bottom-inlet annular fire burner according to claim 1, characterized in that: An annular channel is provided on the upper side of the base, and the base cooperates with the annular fire cover through the annular channel to form a premixing chamber with an annular structure.

4. A downward air inlet annular fire burner according to claim 3, characterized in that: An air inlet groove is also provided on the upper side of the base, and the air inlet groove is recessed downward relative to the annular channel. The first air inlet port is arranged at the bottom of the air inlet groove.

5. The bottom-inlet annular fire burner according to claim 1, characterized in that: It also includes a central fire cover, a second air inlet is provided in the middle of the base, the lower side of the second air inlet is connected to the lower air inlet ejector, and the upper side of the second air inlet is connected to the central fire cover.

6. The bottom-inlet annular fire burner according to claim 5, characterized in that: The central fire cover is provided with a first inclined hole and a second inclined hole penetrating through its own circumferential wall surface, and the first inclined hole and the second inclined hole are inclined from bottom to top and from inside to outside.

7. The bottom-inlet annular fire burner according to claim 6, characterized in that: The first inclined hole is located on the upper side of the second inclined hole, multiple first inclined holes are evenly distributed along the circumferential direction of the center fire cover, multiple second inclined holes are evenly distributed along the circumferential direction of the center fire cover, and the first inclined holes and the second inclined holes are staggered in the up and down directions.

8. The bottom-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.

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