Single loop premix burner

Abstract

The application relates to the technical field of burners and discloses a single-ring premix burner which comprises a base, one side of the base is provided with an air inlet, the upper end of the air inlet is provided with a nozzle seat, a burner head is installed on the base, the burner head is internally provided with a single-ring air groove, a fire cover assembly is arranged on the upper cover of the single-ring air groove, the bottom surface of the single-ring air groove is in a stepped shape, the lower end of the burner head is formed into a protruding part, one side of the protruding part is provided with a premix pipe which is communicated with the single-ring air groove, one end of the premix pipe is provided with a premix inlet which is corresponded to the nozzle seat, the inner side of the single-ring air groove is provided with a premix gas hole which is communicated with the premix pipe, and the premix gas hole is located at the lower end of the single-ring air groove which is in a stepped shape. The single-ring premix burner makes the space on the side of the single-ring air groove which is far away from the premix gas hole smaller, ensures the output pressure of the primary premix gas on the side of the single-ring air groove which is far away from the premix gas hole, and ensures that the annular flame curtain has the same height and that the temperature around the flame curtain is more uniform when the gas is output and combusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of burners, in particular to a single-ring premix burner. BACKGROUND

[0002] Single-ring fire burners, which are usually provided with a fire cover having a ring on the burner head, are generally simpler in structure than multi-ring burners and are more suitable for use in small kitchens.

[0003] A single-ring fire burner disclosed in Chinese patent document CN108180508A belongs to the technical field of cookers, which comprises a burner head and a fire cover arranged on the burner head. A coarse injection pipe and a fine injection pipe are arranged on the burner head. The coarse injection pipe is connected to an annular air channel. An auxiliary chamber is independently arranged in the annular air channel and is connected to the fine injection pipe. A gas supply port of the auxiliary chamber is arranged in correspondence with an ignition assembly. The present application controls the size of fire by two injection pipes, so that the burner can accurately adjust the large and small fires.

[0004] According to the above disclosed prior art, the existing single-ring fire burners are directly connected to one end of the internal annular air channel through the injection pipe, so that the premixed gas enters from one end of the annular air channel. However, since the single-ring fire burner is relatively thin, the premixed gas is easily output from the gap between the one end of the annular air channel close to the injection pipe, and the far end is insufficient in gas output pressure, thereby causing uneven fire curtain and uneven temperature around the single-ring fire curtain. SUMMARY

[0005] In order to overcome the defects of the prior art, the present application provides a single-ring premix burner to solve the problems in the prior art.

[0006] The technical scheme adopted by the present application to solve its technical problems is as follows: a single-ring premix burner, comprising:

[0007] a base, one side of the base is provided with an air inlet, and an upper end of the air inlet is provided with a nozzle seat;

[0008] a burner head, the burner head is installed on the base, the burner head has a single-ring air groove therein, a fire cover assembly is arranged on the single-ring air groove, a bottom surface of the single-ring air groove is in a stepped shape, a lower end of the burner head forms a protruding portion, one side of the protruding portion is provided with a premix pipe connected to the single-ring air groove, one end of the premix pipe is provided with a premix inlet corresponding to the nozzle seat, and the single-ring air groove is provided with a premix gas hole connected to the premix pipe, the premix gas hole is located at the lower end of the single-ring air groove in the stepped shape.

[0009] The beneficial effects of the present application are that by installing the nozzle in the nozzle seat, the gas is input from the air inlet, and then the gas is sprayed into the premix inlet through the nozzle, the air is pressed into the premix inlet together, the gas and the air are premixed in the premix pipe, the premixed gas enters the lower end of the single-ring gas tank, the premixed gas fills in the single-ring gas tank, and the secondary premixing is carried out in the single-ring gas tank, so that the gas premixing is more sufficient, and the combustion is more uniform, preventing the appearance of yellow flame phenomenon, and at the same time, due to the ladder shape of the single-ring gas tank, the space of the single-ring gas tank far from the premixing hole is less, so that the output pressure of the premixed gas far from the premixing hole in the single-ring gas tank can be ensured, so that the annular flame curtain can ensure the same height when the gas is output and combusted, and the temperature around the flame curtain is more uniform.

[0010] Further, the single-ring gas tank is respectively provided with a first tank bottom, a second tank bottom and a third tank bottom, the heights of the first tank bottom, the second tank bottom and the third tank bottom are sequentially increased, the first tank bottom makes the lower end of the burner head form the convex part, and the premixing hole is located on one side of the first tank bottom.

[0011] After adopting the above further structure, after the premixed gas enters from the first tank bottom, due to the relatively less vertical space of the second tank bottom and the third tank bottom, the premixed gas can fill in the entire single-ring gas tank faster, and during the filling process, the premixed gas can further be secondary premixed, so that the mixing is more sufficient, and the gas output pressure above the second tank bottom and the third tank bottom gradually increases, so that the output pressure of the side far from the premixing hole can be ensured.

[0012] Further, the first tank bottom and the second tank bottom are connected through a first arc surface, and the second tank bottom and the third tank bottom are connected through a second arc surface.

[0013] After adopting the above further structure, under the guidance of the first arc surface and the second arc surface, the premixed gas flows faster in the single-ring gas tank.

[0014] Further, screw holes are formed in the base, supporting feet corresponding to the screw holes are arranged at the lower end of the burner head, and the supporting feet are installed on the base through the screw holes.

[0015] After adopting the above further structure, the burner head can be conveniently installed on the base, and after the burner head is fixed, the nozzle can be better aligned with the air inlet, so that the gas can be accurately sprayed into the premixing pipe, and the overall assembly is more convenient.

[0016] Further, the base is respectively provided with a striking needle and an induction needle, the middle part of the burner head is hollow, the premixing pipe is arranged at the lower end of the middle part of the burner head, the two sides of the premixing pipe are respectively provided with a connecting sheet, the connecting sheet is provided with a needle hole and an air hole, and the striking needle and the induction needle are respectively arranged in the needle holes.

[0017] After the above further structure, since the striking needle and the induction needle are respectively arranged in the needle holes, the accuracy of the nozzle and the corresponding premixing pipe can be further improved after the burner head is installed on the base, the installation is more convenient, and the problem of position deviation during assembly or disassembly and reassembly can be prevented.

[0018] Further, the outer side of the single-ring gas groove is provided with an outer wall ring, and the inner side is provided with an inner wall ring, the fire cover assembly comprises a separation ring and a fire cover, the separation ring is arranged on the outer wall ring and the inner wall ring, and the fire cover is arranged on the inner wall ring, so that the premixing cavity is formed between the separation ring and the fire cover, the premixing cavity is communicated with the single-ring gas groove, and the inner wall of the upper part of the separation ring and the outer wall of the fire cover are not in contact and form an out-of-fire ring groove.

[0019] After the above further structure, under the action of the separation ring on the fire cover assembly, the secondary premixing gas in the single-ring gas groove can enter the premixing cavity, and then the three times of premixing can be further carried out, and then the three times of premixing gas is output from the out-of-fire ring groove for combustion, so that the flame combustion is more sufficient, and since the secondary premixing gas enters the premixing cavity, the surrounding gas pressure can be ensured, and the pressure reduction of the secondary premixing gas entering the premixing cavity can be prevented.

[0020] Further, the separation ring comprises a bottom ring, the outer edge of the bottom ring is provided with a hanging ring, the inner edge of the bottom ring is provided with a first supporting ring, the hanging ring is arranged on the outer wall ring, and the first supporting ring is arranged on the inner wall ring, so that the bottom ring is hung on the single-ring gas groove, and a plurality of communication holes are arranged on the bottom ring.

[0021] After the above further structure, the installation of the separation ring is more convenient, so as to facilitate disassembly, washing or assembly.

[0022] Further, the inner wall of the fire cover is provided with a second supporting ring, and the second supporting ring is arranged on the inner wall ring.

[0023] After the above further structure, the installation of the fire cover is more convenient, so as to facilitate disassembly, washing or assembly. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the single-ring premixing burner.

[0025] Figure 2 It is an exploded structural schematic diagram of the base and the burner head.

[0026] Figure 3 is a schematic view of the bottom structure of the burner head.

[0027] Figure 4 is a schematic view of the internal structure of the burner head.

[0028] Figure 5 is a schematic view of the internal structure of the burner head.

[0029] Figure 6 is a schematic view of the internal structure of the burner head.

[0030] Figure 7 is a schematic view of the three-dimensional structure of the fire cap assembly.

[0031] Figure 8 is a schematic view of the exploded structure of the fire cap assembly.

[0032] In the figure: base 1, burner head 2, air inlet 3, nozzle seat 4, threaded hole 5, ignition needle 6, induction needle 7, premix inlet 8, support leg 9, protruding part 10, premix pipe 11, connecting sheet 12, needle hole 13, first groove bottom 14, second groove bottom 15, third groove bottom 16, partition ring 17, fire cap 18, outer wall ring 19, inner wall ring 20, air hole 21, fire ring groove 22, hanging ring 23, bottom ring 24, first support ring 25, second support ring 26, first arc surface 27, second arc surface 28. DETAILED DESCRIPTION

[0033] The specific embodiments of the present application will be further described below with reference to the drawings. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0034] In combination Figures 1 to 8The single ring premix burner shown comprises a base 1 and a burner head 2, the base 1 is provided with an air inlet 3 on one side, and the upper end of the air inlet 3 is provided with a nozzle seat 4; the burner head 2 is installed on the base 1, the burner head 2 has a single ring air groove, a fire cover assembly is arranged on the single ring air groove, the bottom surface of the single ring air groove is in a stepped shape, the lower end of the burner head 2 forms a protruding part 10, one side of the protruding part 10 is provided with a premix pipe 11 which is in communication with the single ring air groove, one end of the premix pipe 11 is provided with a premix inlet 8 which corresponds to the nozzle seat 4, the single ring air groove is provided with a premix gas hole which is in communication with the premix pipe 11, and the premix gas hole is located at the lower end of the single ring air groove which is in a stepped shape; in this embodiment, a nozzle is installed on the nozzle seat 4, so that the gas is input from the air inlet 3, and then the gas is sprayed into the premix inlet 8 through the nozzle, so that the air is pressed into the premix inlet 8 together, so that the gas and the air are premixed in the premix pipe 11, the premixed gas enters the lower end of the single ring air groove, so that the premixed gas fills in the single ring air groove, and the premixed gas is further premixed in the single ring air groove, so that the gas is more fully premixed, the combustion is more uniform, and the yellow flame phenomenon is prevented, and at the same time, due to the stepped shape of the single ring air groove, the space on the side of the single ring air groove which is far away from the premix gas hole is reduced, so that the output pressure of the premixed gas on the side of the single ring air groove which is far away from the premix gas hole can be ensured, so that the annular flame curtain can ensure the same height when the gas is output and combusted, and the temperature around the flame curtain is more uniform.

[0035] In combination Figures 4 to 6 As shown, the single ring air groove of this embodiment is respectively provided with a first groove bottom 14, a second groove bottom 15 and a third groove bottom 16, the heights of the first groove bottom 14, the second groove bottom 15 and the third groove bottom 16 are increased in turn, the first groove bottom 14 makes the lower end of the burner head 2 form a protruding part 10, and the premix gas hole is located on one side of the first groove bottom 14; after the premixed gas enters from the first groove bottom 14, due to the relatively smaller vertical space of the second groove bottom 15 and the third groove bottom 16, the premixed gas can fill in the entire single ring air groove more quickly, and in the filling process, the premixed gas can be further premixed, so that the mixing is more sufficient, and the gas output pressure above the second groove bottom 15 and the third groove bottom 16 gradually increases, so that the output pressure on the side which is far away from the premix gas hole can be ensured.

[0036] It is worth noting that the first groove bottom 14 and the second groove bottom 15 of this embodiment are connected through a first arc surface 27, and the second groove bottom 15 and the third groove bottom 16 are connected through a second arc surface 28; under the guidance of the first arc surface 27 and the second arc surface 28, the premixed gas flows faster in the single ring air groove.

[0037] As Figure 1 and Figure 2As shown, the base 1 of the embodiment is provided with a threaded hole 5, and the lower end of the burner 2 is provided with a supporting leg 9 corresponding to the threaded hole 5, and the supporting leg 9 is installed on the base 1 by screwing through the threaded hole 5; so that the burner 2 can be conveniently installed on the base 1, and after the burner 2 is fixed, the nozzle can be better aligned with the air inlet 3, so that the gas can be accurately injected into the premixing pipe 11, and the overall assembly is more convenient.

[0038] The base 1 is respectively provided with a sparking needle 6 and an induction needle 7, the middle part of the burner 2 is hollow, the premixing pipe 11 is arranged at the lower end of the middle part of the burner 2, and the two sides of the premixing pipe 11 are respectively provided with a connecting piece 12, the connecting piece 12 is provided with a needle hole 13 and an air hole 21, and the sparking needle 6 and the induction needle 7 are respectively arranged in the needle holes 13 on the two sides; since the sparking needle 6 and the induction needle 7 are respectively arranged in the needle holes 13 on the two sides, after the burner 2 is installed on the base 1, the corresponding accuracy of the nozzle and the premixing pipe 11 can be further improved, the installation is more convenient, and the problem of installation position deviation during assembly or disassembly and reassembly can be prevented.

[0039] In combination Figures 4 to 8 As shown, the outer side of the single-ring air slot of the embodiment is provided with an outer wall ring 19, and the inner side is provided with an inner wall ring 20, the fire cover assembly includes a separation ring 17 and a fire cover 18, the separation ring 17 is arranged on the outer wall ring 19 and the inner wall ring 20, and the fire cover 18 is arranged on the inner wall ring 20, so that a premixing chamber is formed between the separation ring 17 and the fire cover 18, the premixing chamber is communicated with the single-ring air slot, and the inner wall of the upper part of the separation ring 17 and the outer wall of the fire cover 18 are not in contact and form an out-fire ring slot 22; under the action of the separation ring 17 on the fire cover assembly, after the secondary premixed gas in the single-ring air slot enters the premixing chamber, the gas can be further premixed for the third time, and then the gas after the third premixing is output from the out-fire ring slot 22 for combustion, so that the flame burns more fully, and since the pressure of the surrounding gas can be ensured when the secondary premixed gas enters the premixing chamber, the pressure of the secondary premixed gas entering the premixing chamber is prevented from being reduced.

[0040] The separation ring 17 includes a bottom ring 24, the outer edge of the bottom ring 24 is provided with a hanging ring 23, the inner edge of the bottom ring 24 is provided with a first supporting ring 25, the hanging ring 23 is arranged on the outer wall ring 19, and the first supporting ring 25 is arranged on the inner wall ring 20, so that the bottom ring 24 is hung on the single-ring air slot, and a plurality of communication holes are arranged on the bottom ring 24; so that the installation of the separation ring 17 is more convenient, so as to facilitate disassembly, washing or assembly; the inner wall of the fire cover 18 is provided with a second supporting ring 26, and the second supporting ring 26 is arranged on the inner wall ring 20; so that the installation of the fire cover 18 is more convenient, so as to facilitate disassembly, washing or assembly.

[0041] The embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the described embodiments. Various changes, modifications, replacements, and variations of the embodiments can be made by those skilled in the art without departing from the principles and spirit of the present application, and still fall within the scope of the present application.

Claims

1. A single loop premix combustor characterized by, The utility model relates to a gas stove, which comprises a base (1) provided with an air inlet (3) on one side, a burner head (2) installed on the base (1), a single-ring air channel in the burner head (2), a fire cover assembly provided on the single-ring air channel, a stepped bottom surface of the single-ring air channel, a convex part (10) formed at the lower end of the burner head (2), a premixing pipe (11) provided on one side of the convex part (10) and connected to the single-ring air channel, a premixing inlet (8) provided at one end of the premixing pipe (11) and corresponding to the nozzle seat (4), a premixing hole provided in the single-ring air channel and connected to the premixing pipe (11), and the premixing hole being located at the lower end of the single-ring air channel with a stepped bottom surface. The nozzle seat is provided with a nozzle, so that the gas is input from the air inlet (3) and sprayed into the premixing inlet (8) through the nozzle, and the air is also pressed into the premixing inlet (8) to realize the first premixing of the gas and the air in the premixing pipe (11). The single-ring air channel is provided with a first groove bottom (14), a second groove bottom (15) and a third groove bottom (16), the heights of the first groove bottom (14), the second groove bottom (15) and the third groove bottom (16) are gradually increased, the first groove bottom (14) forms the convex part (10) at the lower end of the burner head (2), and the premixing hole is located on one side of the first groove bottom (14). The first groove bottom (14) and the second groove bottom (15) are connected through a first arc surface (27), the second groove bottom (15) and the third groove bottom (16) are connected through a second arc surface (28), the first premixed gas enters the first groove bottom (14), and the first premixed gas can be further subjected to the second premixing. The single-ring air channel is provided with an outer wall ring (19) on the outside and an inner wall ring (20) on the inside, the fire cover assembly comprises a partition ring (17) and a fire cover (18), the partition ring (17) is provided on the outer wall ring (19) and the inner wall ring (20), the fire cover (18) is provided on the inner wall ring (20), so that a premixing cavity is formed between the partition ring (17) and the fire cover (18), the premixing cavity is connected to the single-ring air channel, and the inner wall of the upper portion of the partition ring (17) and the outer wall of the fire cover (18) are not in contact and form an outflow ring groove (22). The partition ring (17) comprises a bottom ring (24), the outer edge of the bottom ring (24) is provided with a hanging ring (23), the inner edge of the bottom ring (24) is provided with a first supporting ring (25), the hanging ring (23) is provided on the outer wall ring (19), and the first supporting ring (25) is installed on the inner wall ring (20), so that the bottom ring (24) is hung on the single-ring air channel, and a plurality of communication holes are formed in the bottom ring (24). The second premixed gas in the single-ring air channel enters the premixing cavity to further perform the third premixing. ​ ​ ​ The base (1) is respectively provided with a sparking needle (6) and an induction needle (7), the middle part of the burner head (2) is hollow, the premixing pipe (11) is arranged at the lower end of the middle part of the burner head (2), the two sides of the premixing pipe (11) are respectively provided with a connecting piece (12), the connecting piece (12) is respectively provided with a needle hole (13) and an air hole (21), and the sparking needle (6) and the induction needle (7) are respectively arranged in the needle holes (13) on the two sides. The inner wall of the fire cover (18) is provided with a second supporting ring (26), and the second supporting ring (26) is arranged on the inner wall ring (20).

2. A single loop premix combustor as claimed in claim 1, wherein, The base (1) is provided with a screw hole (5), the lower end of the burner head (2) is provided with a supporting leg (9) corresponding to the screw hole (5), and the supporting leg (9) is installed on the base (1) by screwing through the screw hole (5).

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