Lower air inlet annular fire burner

Abstract

The utility model discloses a lower air inlet annular fire burner, which belongs to the technical field of gas cooking appliances, and comprises a lower air inlet ejector, a furnace end, an annular fire cover and an annular premixing component, the lower air inlet ejector is communicated with the bottom of the furnace end, and the lower air inlet ejector is arranged below a cooking range to enable gas to rise from bottom to top; the furnace end is provided with an annular groove, the annular fire cover is arranged on the upper side of the furnace end to form an annular cavity, a fire outlet hole is formed between the edge of the annular fire cover and the edge of the upper side of the furnace end, and the fire outlet hole is communicated with the annular cavity; the annular premixing assembly comprises an isolation piece which is horizontally hung in the annular groove so as to divide the annular cavity into a lower mixing cavity and an upper mixing cavity. According to the lower air inlet annular fire burner, the problem that flames are not ideal due to the fact that gas and air of an existing burner are not fully mixed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas cookers, in particular to a bottom air inlet annular fire burner. Background Art

[0002] The downwind of the burner means that air enters from the bottom of the burner head to help the gas burn fully. The stove made of the downwind burner meets the cooking habits of Chinese people of stir-frying with fierce fire, increases the heat load, and solves the shortcomings of burners that generally require cabinet holes or rely on larger cabinet gaps to supplement the oxygen required for combustion.

[0003] The Chinese invention patent with application number 200910062122.2 discloses a "ventilated tower type bottom air inlet gas stove", which includes a burner and an ejector. The first ejector is connected to the inner and outer mixing chambers of the burner in the tangential direction of the lower end of the outer mixing chamber in the burner to form a whole; the second ejector is connected to the lower end of the inner mixing chamber in the burner to form a whole, so as to achieve the purpose of bottom air inlet. However, each ring fire corresponding to the burner has only one mixing chamber, which will lead to insufficient mixing of the combustion chamber gas and air, resulting in an unsatisfactory flame. Utility Model Content

[0004] In order to overcome the defects of the prior art, the utility model provides a bottom air inlet annular fire burner to solve the above problems.

[0005] The utility model solves the technical problem by adopting the following technical solution: a lower air inlet annular fire burner is arranged on a stove, comprising a lower air inlet ejector, a burner head, an annular fire cover and an annular premixing assembly, wherein the lower air inlet ejector is connected to the bottom of the burner head, and the lower air inlet ejector is arranged below the stove to make the gas rise from bottom to top;

[0006] The burner head is provided with an annular groove, and the annular fire cover is provided on the upper side of the burner head to form an annular cavity, a fire outlet hole is formed between the edge of the annular fire cover and the upper edge of the burner head, and the fire outlet hole is communicated with the annular cavity;

[0007] The annular premixing assembly includes an isolation plate, which is horizontally suspended in the annular groove to divide the annular cavity into a lower mixing cavity and an upper mixing cavity.

[0008] Preferably, the annular premixing assembly further comprises a hook portion, the hook portion is fixedly connected to one end of the isolation plate, and the hook portion is perpendicular to the isolation plate, and the hook portion is hung on the edge of the burner head.

[0009] Optionally, the isolation sheet is evenly provided with a plurality of air holes along the circumferential direction, and the lower mixing chamber is connected with the upper mixing chamber through the air holes.

[0010] Specifically, an air block is provided on the edge of the annular fire cover, a concave groove is formed between the air block and the inner wall of the annular fire cover, and the concave groove is communicated with the upper mixing chamber;

[0011] The air baffle block and the edge of the burner head form the fire outlet.

[0012] It is worth noting that one end of the hook portion close to the isolation plate is attached to the wall surface of the edge of the burner head, and one end of the hook portion is located between the edge of the burner head and the air baffle block, so that the fire outlet extends vertically upward.

[0013] Preferably, an edge of the air baffle block close to the furnace head is provided with a chamfer, and the chamfer is inclined from bottom to top and from inside to outside.

[0014] The beneficial effect of the utility model is that in the lower air inlet annular fire burner, air and gas are first premixed in the lower air inlet ejector and then enter the annular cavity, and then a lower mixing chamber and an upper mixing chamber are formed by means of a horizontally suspended isolation plate, the lower mixing chamber is used to premix gas and air for a second time and then enter the upper mixing chamber, after ignition and combustion in the upper mixing chamber, the upper mixing chamber can supplement air to achieve a third mixing, thereby making the combustion more complete, and finally the flame is ejected from the fire outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a bottom air inlet annular fire burner in one embodiment of the utility model;

[0016] Figure 2 It is a structural schematic diagram of a lower air inlet ejector and a furnace head in one embodiment of the utility model;

[0017] Figure 3 It is a structural schematic diagram of a lower air inlet ejector and a furnace head in another embodiment of the utility model;

[0018] Figure 4 It is a cross-sectional view of a bottom air inlet annular fire burner in one embodiment of the utility model;

[0019] Figure 5 for Figure 4 An enlarged schematic diagram of a dotted circle A;

[0020] Figure 6 This is a schematic structural diagram of an annular premixing assembly in one embodiment of the utility model;

[0021] Figure 7 for Figure 6 An enlarged schematic diagram of a dotted circle A;

[0022] In the figure: 1 lower air inlet ejector; 2 burner head; 21 annular groove; 22 lower mixing chamber; 23 upper mixing chamber; 3 annular premixing assembly; 31 isolation plate; 311 air hole; 32 hook portion; 4 annular fire cover; 41 fire outlet hole; 42 air baffle; 421 recessed groove; 422 chamfer. DETAILED DESCRIPTION

[0023] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods 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 each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] like Figure 1-7 As shown, a lower air inlet annular fire burner is arranged in a stove, comprising a lower air inlet ejector 1, a burner head 2, an annular fire cover 4 and an annular premixing component 3, as shown in FIG. Figure 3 As shown, the lower air inlet ejector 1 is connected to the bottom of the burner 2, and the lower air inlet ejector 1 is arranged below the stove to allow the gas to rise from bottom to top;

[0025] like Figure 2 As shown, the burner head 2 is provided with an annular groove 21, and the annular fire cover 4 is provided on the upper side of the burner head 2 to form an annular cavity, and a fire outlet hole 41 is formed between the edge of the annular fire cover 4 and the edge of the upper side of the burner head 2, and the fire outlet hole 41 is connected with the annular cavity; thus, the formed fire outlet hole 41 is annular, so that the flame formed at the fire outlet hole 41 is annular;

[0026] The annular premixing assembly 3 includes an isolation plate 31 , and the isolation plate 31 is horizontally suspended in the annular groove 21 to divide the annular cavity into a lower mixing cavity 22 and an upper mixing cavity 23 .

[0027] In the lower air inlet annular fire burner, air and gas are first premixed in the lower air inlet ejector 1 and then enter the annular cavity. Then, a lower mixing chamber 22 and an upper mixing chamber 23 are formed by using a horizontally suspended isolation plate 31. The lower mixing chamber 22 is used to premix gas and air for a second time and then enter the upper mixing chamber 23. After the upper mixing chamber 23 is ignited and burned, the upper mixing chamber 23 can supplement air to achieve a third mixing, thereby making the combustion more complete. Finally, the flame is ejected from the fire outlet 41.

[0028] In this embodiment, the horizontally suspended annular premixing assembly 3 can increase the space of the upper mixing chamber 23, so that the air and gas are more fully mixed during the third mixing. The hook portion 32 is hung on the edge of the burner 2 and riveted to the outer side of the edge of the burner 2. The riveting can make the annular premixing assembly 3 more stable, and the change of thermal expansion and contraction coefficient can be eliminated during combustion.

[0029] It is worth noting that if Figure 5 As shown, the annular premixing assembly 3 further includes a hook portion 32, the hook portion 32 is fixedly connected to one end of the isolation sheet 31, and the hook portion 32 is perpendicular to the isolation sheet 31, and the hook portion 32 is hung on the edge of the burner head 2. The hook portion 32 is integrally formed with the isolation sheet 31, and after the isolation sheet 31 is hung on the edge of the burner head 2 by the hook portion 32, the isolation sheet 31 can be horizontally arranged to achieve the purpose of horizontal suspension.

[0030] Preferably, Figure 6 As shown, the isolation sheet 31 is evenly provided with a plurality of air holes 311 along the circumferential direction, and the lower mixing chamber 22 is connected with the upper mixing chamber 23 through the air holes 311. Figure 7 As shown, the air holes 311 are louver-type straight-strip holes, and the air holes 311 are rotationally symmetrical. Gas enters from the bottom, passes through the louver-type straight-strip holes, and exits from the top, so that a rotating fire can be formed after ignition.

[0031] Optional, such as Figure 5 As shown, an air baffle block 42 is provided at the edge of the annular fire cover 4, a recessed groove 421 is formed between the air baffle block 42 and the inner wall of the annular fire cover 4, and the recessed groove 421 is connected to the upper mixing chamber 23; the air baffle block 42 and the edge of the burner head 2 form the fire outlet 41.

[0032] After the gas from the lower mixing chamber 22 enters the upper mixing chamber 23, it will not flow directly to the fire outlet 41, but will Figure 5 As shown by the arrow, it rushes toward the recessed groove 421, and then enters the fire outlet hole 41 after rebounding. In this way, the recessed groove 421 can play a buffering effect. Even if a swirl fire is formed, it will not directly rush out of the fire outlet hole 41, leaving more time for the gas to be mixed with the air for the third time.

[0033] Specifically, Figure 5As shown, one end of the hook portion 32 close to the isolation sheet 31 is attached to the wall surface of the edge of the burner head 2, and one end of the hook portion 32 is located between the edge of the burner head 2 and the air baffle 42, so that the fire outlet 41 extends vertically upward. In this way, the space of the fire outlet 41 extending vertically upward is much smaller than the upper mixing chamber 23. When the mixed gas flows to the fire outlet 41 and burns, the fire outlet 41 will serve as a booster port, using the principle of compression to make the flame ejected straight upward. With the ring-shaped setting, a flame curtain ejected straight upward can be formed, making the flame look more vigorous.

[0034] It is worth noting that if Figure 5 As shown, the edge of the gas blocking block 42 close to the burner head 2 is provided with a chamfer 422, and the chamfer 422 is inclined from bottom to top and from inside to outside. In this embodiment, the inner direction is the direction close to the middle of the burner head 2, and the outer direction is the direction away from the middle of the burner head 2. After the chamfer 422 is provided, the gas can be more easily guided into the fire outlet 41 after colliding with the concave groove 421 and rebounding.

[0035] 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, arranged on a stove, characterized in that: The invention comprises a lower air inlet ejector, a burner, an annular fire cover and an annular premixing assembly, wherein the lower air inlet ejector is connected to the bottom of the burner, and the lower air inlet ejector is arranged below the stove to make the gas rise from bottom to top; The burner head is provided with an annular groove, and the annular fire cover is provided on the upper side of the burner head to form an annular cavity, a fire outlet hole is formed between the edge of the annular fire cover and the upper edge of the burner head, and the fire outlet hole is communicated with the annular cavity; The annular premixing assembly includes an isolation plate, which is horizontally suspended in the annular groove to divide the annular cavity into a lower mixing cavity and an upper mixing cavity.

2. A downward air inlet annular fire burner according to claim 1, characterized in that: The annular premixing assembly further comprises a hook portion, the hook portion is fixedly connected to one end of the isolation plate, the hook portion is perpendicular to the isolation plate, and the hook portion is hung on the edge of the burner head.

3. The bottom-inlet annular fire burner according to claim 1, characterized in that: The isolation plate is evenly provided with a plurality of air holes along the circumferential direction, and the lower mixing chamber is connected with the upper mixing chamber through the air holes.

4. A downward air inlet annular fire burner according to claim 2, characterized in that: An air block is provided at the edge of the annular fire cover, a concave groove is formed between the air block and the inner wall of the annular fire cover, and the concave groove is communicated with the upper mixing chamber; The air baffle block and the edge of the burner head form the fire outlet.

5. The bottom-inlet annular fire burner according to claim 4, characterized in that: One end of the hook portion close to the isolation sheet is attached to the wall surface of the edge of the burner, and one end of the hook portion is located between the edge of the burner and the air baffle, so that the fire outlet extends vertically upward.

6. The bottom-inlet annular fire burner according to claim 4, characterized in that: The edge of the air baffle block close to the furnace head is provided with a chamfer, and the chamfer is inclined from bottom to top and from inside to outside.

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