Fire distributor and upper air inlet inner flame burner thereof

Abstract

The distributor comprises a distributor body, a central cavity with an upper opening and a lower opening and a first air cavity with an upward opening, the central cavity is arranged at the central position of the distributor body, and the first air cavity is arranged on the periphery of the central cavity and provided with a first end and a second end which are oppositely arranged; and the first injection pipe is transversely arranged at the bottom of the distributor body, the air inlet end of the first injection pipe is located at the bottom of the first end of the first air cavity, and the air outlet end of the first injection pipe stretches across the bottom of the center cavity and is communicated with the second end of the first air cavity. According to the distributor, the primary air coefficient and the secondary air coefficient can be increased, combustion is more sufficient, the heat efficiency is higher, and CO emission is lower. The utility model further provides an upper air inlet inner flame burner.

Description

Technical Field

[0001] The utility model relates to the technical field of stoves, in particular to a fire distributor and an upper air inlet inner flame burner thereof. Background Art

[0002] Existing upper air inlet burners, especially upper air inlet inner flame burners, often lead to insufficient secondary air supply due to the flame gathering toward the center of the burner, resulting in incomplete combustion, low thermal efficiency, and high CO content in the flue gas. Summary of the invention

[0003] The utility model aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the utility model proposes a flame distributor that can improve the primary air coefficient and secondary air, so as to make the combustion more complete, the thermal efficiency higher and the CO emission lower. The utility model also provides an upper air inlet inner flame burner.

[0004] According to the above-mentioned fire distributor, it is realized by the following technical solution:

[0005] A fire divider comprises: a fire divider body, having a central cavity with upper and lower openings and a first air cavity with an upward opening, wherein the central cavity is arranged at the central position of the fire divider body, and the first air cavity is arranged at the periphery of the central cavity and has a first end and a second end arranged oppositely; and a first ejector tube, which is transversely arranged at the bottom of the fire divider body, wherein the air inlet end of the first ejector tube is located at the bottom of the first end of the first air cavity, the air outlet end spans the bottom of the central cavity and is connected to the second end of the first air cavity, and the bottom opening of the central cavity is divided into two parts by the first ejector tube.

[0006] In some embodiments, side openings are respectively provided on two opposite side walls of the first ejector tube, and the side openings are located below the central cavity and communicated with the bottom opening of the central cavity.

[0007] In some embodiments, a premixing chamber extending downward and opening upward is provided at the bottom of the second end of the first air cavity, and the gas outlet end of the first ejector pipe penetrates the inner annular wall of the premixing chamber and is connected to the first air cavity through the premixing chamber.

[0008] In some embodiments, an annular boss extending toward the interior of the central cavity is provided on the circumference of the cavity wall of the central cavity, and a positioning notch is provided on the annular boss.

[0009] In some embodiments, the ignition divider body also has a second air cavity opening upward, and the second air cavity is arranged on the periphery of the first air cavity; at least one second ejector tube is provided at the bottom of the ignition divider body, and the air inlet end of at least one second ejector tube is connected to the bottom of the first air cavity, and the air outlet end is connected to the second air cavity; the first ejector tube and the second ejector tube are arranged in parallel and in the same or opposite directions.

[0010] In some embodiments, the air inlet end of the first ejector tube extends outward to the bottom of the second air cavity and is fixedly connected to the bottom of the second air cavity.

[0011] In some embodiments, an upwardly open air cavity is formed between the second air cavity and the first air cavity, and a secondary air passage located outside the first ejector tube and connected to the air cavity is provided at the bottom of the air cavity.

[0012] In some embodiments, a limiting support is further included. The limiting support is disposed in the secondary air passage and fixedly connected to the second ejector tube, and an assembly hole is provided on the limiting support.

[0013] In some embodiments, the number of the second ejector tubes is two, and the two second ejector tubes are respectively arranged on two relatively outer sides of the first ejector tube; the limiting support is arranged between the two second ejector tubes and includes two connecting arms, and the fixed ends of the two connecting arms are respectively fixedly connected to the two second ejector tubes, and the assembly hole is formed between the free ends of the two connecting arms.

[0014] According to the above-mentioned upper air inlet inner flame burner, it is realized by the following technical solution:

[0015] A top-inlet internal flame burner comprises: a flame distributor as described above; and a base, which is arranged at the bottom of the flame distributor, and a first air outlet seat extending upward is provided on the top surface of the base, and the first air outlet seat is connected to the air inlet end of the first ejector tube.

[0016] In some embodiments, a gap is left between the top of the first air outlet seat and the higher end of the bottom of the ignition divider body; and / or a positioning structure is provided between the lower end of the bottom of the ignition divider body and the top surface of the base.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. The utility model of the fire distributor is provided with a central cavity with upper and lower openings and a first air cavity with an upward opening on the fire distributor body, and a first ejector tube is provided at the bottom of the fire distributor body, which spans the bottom of the central cavity and is connected to the first air cavity. Compared with the inner ejector tube of the existing upper air inlet burner, the first ejector tube is long enough, has a stronger ejection capacity, ejects more primary air, and has a higher primary air coefficient. In addition, the central cavity can provide secondary air for the inner ring fire. With the cooperation of the first ejector tube and the central cavity, the combustion is more complete, the thermal efficiency is higher, and the CO emission is lower.

[0019] 2. By adding an upwardly opening premixing chamber at the position of the ignition distributor body corresponding to the gas outlet end of the first ejector tube, the first ejector tube is connected with the first air cavity through the premixing chamber, so that the gas and air are further mixed in the premixing chamber before entering the first air cavity of the ignition distributor, so that the gas and air are mixed more evenly;

[0020] 3. An air cavity is provided between the first air cavity and the second air cavity on the ignition divider body, and a secondary air supplement channel is provided at the bottom of the air cavity. With the cooperation of the secondary air supplement channel and the central cavity, sufficient secondary air is provided for gas combustion, so that the inner and outer ring fires can burn more completely. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the fire distributor in Example 1 of the utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the fire distributor in Example 1 of the utility model. Figure 2 ;

[0023] Figure 3 It is a cross-sectional view of the fire distributor in Example 1 of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the burner in Example 2 of the utility model;

[0025] Figure 5 is a cross-sectional view of a burner in Embodiment 2 of the present utility model;

[0026] Figure 6 It is a structural schematic diagram of the base in Example 2 of the utility model.

[0027] In the figure: 1-fire divider, 11-fire divider body, 111-central cavity, 1112-annular boss, 1113-positioning notch, 112-first air cavity, 1121-premixing chamber, 113-second air cavity, 1131-premixing cavity, 1132-partition, 114-air cavity, 1151-large air inlet, 1152-medium air inlet, 1153-small air inlet, 12-first ejector tube, 121-lateral opening, 13-second ejector tube, 14-limiting support, 141-assembly hole, 15-positioning protrusion, 151-positioning hole;

[0028] 2-base, 211-first air outlet seat, 212-second air outlet seat, 22-installation hole, 23-positioning column, 24-support platform; 31-first fire cover, 32-second fire cover; 4-ignition assembly. DETAILED DESCRIPTION

[0029] The following examples illustrate the present invention, but the present invention is not limited by these examples. Modifications to the specific implementation of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed for protection in the present invention.

[0030] Example 1

[0031] refer to Figure 1-3 The present embodiment provides a fire distributor, the fire distributor 1 comprises a fire distributor body 11, a first ejector tube 12 and a second ejector tube 13. The fire distributor body 11 has a central cavity 111 with upper and lower openings, a first air cavity 112 with an upward opening and a second air cavity 113 with an upward opening. The central cavity 111 is arranged at the central position of the fire distributor body 11, and is used for secondary air to pass through, so as to supplement the secondary air required for combustion for the radial inner side of the inner ring fire of the burner. The second air cavity 113 is arranged at the periphery of the central cavity 111, and is used to provide the outer ring mixed gas required for combustion for the outer ring of the burner. The first air cavity 112 is arranged between the second air cavity 113 and the central cavity 111, and is used to provide the inner ring mixed gas required for combustion for the inner ring of the burner. In the present embodiment, the bottom of the fire distributor body 11 is arranged with one end high and the other end low, and the first air cavity 112 has a first end and a second end arranged oppositely, the first end is arranged close to the lower end of the bottom of the fire distributor body 11, and the second end is arranged close to the higher end of the bottom of the fire distributor body 11.

[0032] refer to Figure 2-3The first ejector tube 12 is disposed transversely at the bottom of the igniter body 11 and is fixedly connected to the igniter body 11. The air inlet end of the first ejector tube 12 is located at the bottom of the first end of the first air cavity 112, and the air outlet end of the first ejector tube 12 spans the bottom of the central cavity 111 and is connected to the second end of the first air cavity 112. In this embodiment, the first ejector tube 12 transversely passes through the central axis of the central cavity 111, and the bottom opening of the central cavity 111 is divided into two parts by the first ejector tube 12. Therefore, compared with the internal ejector tube of the existing upper air inlet burner, the length of the first ejector tube 12 is long enough, the ejection capacity is stronger, the ejected primary air is more, and the primary air coefficient is higher. With the cooperation of the first ejector tube 12 and the central cavity 111, the inner ring fire of the burner burns more fully, the thermal efficiency is higher, and the CO emission is lower.

[0033] refer to Figure 2 At least one second ejector tube 13 is provided at the bottom of the ignition divider body 11, the air inlet end of the at least one second ejector tube 13 is connected to the bottom of the first air cavity 112, and the air outlet end is connected to the second air cavity 113. In this embodiment, there are two second ejector tubes 13, the two second ejector tubes 13 are flush and arranged in the same direction and are respectively arranged at two opposite outer sides of the first ejector tube 12, and the first ejector tube 12 is parallel to the second ejector tube 13 and arranged in the same direction. In other embodiments, the first ejector tube 12 can be designed to be parallel to the second ejector tube 13 and arranged in the opposite direction.

[0034] Furthermore, an annular boss 1112 extending toward the interior of the central cavity 111 is provided on the circumference of the cavity wall of the central cavity 111, see Figure 1 The annular boss 1112 is used to support the first flame cover of the burner. In addition, a positioning notch 1113 is provided on the annular boss 1112. Figure 1 The positioning notch 1113 is used to pre-position the first fire cover of the burner to prevent the first fire cover of the burner from rotating relative to the flame distributor 1.

[0035] Furthermore, lateral openings 121 are respectively provided at positions of the opposite side walls of the first ejector tube 12 corresponding to the central cavity 111, see Figure 3 The lateral opening 121 is located below the central cavity 111 and is connected to the bottom opening of the central cavity 111, thereby increasing the unit air intake area of ​​the secondary air of the central cavity 111 and reducing the impact of the first ejector tube 12 crossing the bottom of the central cavity 111 on the secondary air replenishment of the central cavity 111.

[0036] See also Figure 1-3, a premixing chamber 1121 extending downward and opening upward is integrally formed at the bottom of the second end of the first air cavity 112, so that the bottom of the first air cavity 112 is arranged with one end high and the other end low. The gas outlet end of the first ejector tube 12 penetrates the inner ring wall of the premixing chamber 1121, and it is connected with the first air cavity 112 through the premixing chamber 1121, so that the gas and air are further mixed in the premixing chamber 1121 before entering the first air cavity 112 of the igniter body 11, so that the gas and air are mixed more evenly. In this embodiment, the premixing chamber 1121 is arc-shaped, and its length is greater than 1 / 4 of the circumference of the first air cavity 112 and less than 1 / 2 of the circumference of the first air cavity 112; in addition, the opposite ends of the premixing chamber 1121 are respectively fixedly connected to the two second ejector tubes 13, so as to strengthen the overall strength of the igniter body 11 while making the connection between the igniter body 11 and the second ejector tubes 13 more stable and reliable.

[0037] In this embodiment, the air inlet end of the first ejector tube 12 extends outward to the bottom of the second air cavity 113 and is fixedly connected to the bottom of the second air cavity 113, so as to further extend the length of the first ejector tube 12. The air inlet of the first ejector tube 12 and the air inlet of the second ejector tube 13 are arranged in the same direction and staggered to reduce the mutual influence between the first and second ejector tubes when ejecting primary air.

[0038] See also Figure 1-3 , a premixing chamber 1131 extending downward and opening upward is integrally formed at the bottom of the second air cavity 113 away from the air inlet end of the second ejector tube 13, so that the bottom of the second air cavity 113 is arranged with one end high and the other end low, thereby making the bottom of the igniter body 11 high at one end and low at the other end. In this embodiment, the premixing chamber 1131 is arc-shaped, and its length is greater than 1 / 2 of the circumference of the second air cavity 113 and less than the circumference of the second air cavity 113. Gentle slopes extending obliquely upward are formed at the opposite ends of the bottom surface of the premixing chamber 1131 to guide the gas. The outlet end of the second ejector tube 13 penetrates the inner ring wall of the premixing chamber 1131, and is connected to the second air cavity 113 through the premixing chamber.

[0039] In this embodiment, a partition 1131 is provided in the premixing chamber 1131, and the partition 1131 divides the premixing chamber 1131 into two parts. The two parts are configured to be connected to the air outlet ends of the two second ejector tubes 13 respectively, so as to reduce the interference between the airflows ejected from the two second ejector tubes 13.

[0040] refer to Figure 1-3The fire distributor body 11 also has an upwardly open air cavity 114, and the air cavity 114 is arranged between the second air cavity 113 and the first air cavity 112. A secondary air channel is provided at the bottom of the air cavity 114, which is located outside the first ejector tube 12 and communicated with the air cavity 114, so as to replenish the secondary air for the air cavity 114 through the secondary air channel, and then replenish the secondary air for combustion for the radial outer side of the inner ring fire and the radial inner side of the outer ring fire, so that the combustion of the inner and outer ring fires is more complete.

[0041] In this embodiment, the secondary air passage includes two large air inlets 1151, a medium air inlet 1152 and two small air inlets 1153, wherein the two large air inlets 1151 are arranged opposite to each other along a first direction, and the medium air inlet 1152 and the two small air inlets 1153 are arranged opposite to each other along a second direction, and the first direction is perpendicular to the second direction, so that the unit replenishment area of ​​the secondary air is increased while realizing the replenishment of the secondary air for the air cavity 114 from multiple directions. Specifically, a large air inlet 1151 is formed between the side of the second ejector tube 12 away from the central cavity 111 and the second air cavity 113; a medium air inlet 1152 located between the two second ejector tubes is formed between the second end of the first air cavity 112 and the second air cavity 113; and a small air inlet 1153 is formed between the air inlet end of the first ejector tube and the second ejector tube.

[0042] refer to Figure 1-3 The ignition distributor 1 also includes a limit support 14, which is arranged in the secondary air channel and fixedly connected to the second ejector tube 13. An assembly hole 141 is provided on the limit support 14 for the ignition component to vertically pass through. By placing the limit support 14 in the secondary air channel, when the secondary air is replenished to the air cavity 114 upward, the ignition component installed on the limit support 14 can be cooled.

[0043] In this embodiment, the limiting support 14 is disposed in the middle air inlet 1152 of the secondary air passage and its opposite ends are respectively fixedly connected to the two second ejector tubes 13, and the middle air inlet 1152 is divided into two parts by the limiting support 14. The limiting support 14 includes two connecting arms (not shown in the figure), the fixed ends of the two connecting arms are respectively fixedly connected to the two second ejector tubes 13, and an assembly hole 141 is formed between the free ends of the two connecting arms.

[0044] refer to Figure 2 At least one positioning protrusion 15 extending downward is integrally formed at the lower end of the bottom of the ignition divider body 11. In the present embodiment, there are two positioning protrusions, and each positioning protrusion 15 is provided with a positioning hole 151 opening downward for positioning the ignition divider 1 on the base of the burner.

[0045] Example 2

[0046] refer to Figure 4-6 , a top-inlet internal flame burner of this embodiment comprises a ignition distributor as described in Example 1, a base 2, a first fire cover 31, a second fire cover 32 and an ignition assembly 4. A first gas outlet seat 211 extending upward and a second gas outlet seat 212 equal in number to the second ejector tubes are provided on one side of the top surface of the base 2. In this embodiment, the first gas outlet seat 211 and the two second gas outlet seats 212 are arranged side by side in the same direction, and a mounting hole 22 is provided on the other side of the top surface of the base 2 for fixing the ignition assembly 22. Inner ring fire holes arranged at intervals in the circumferential direction are provided on the inner ring wall and the top of the first fire cover 31, respectively, so that part of the flame of the inner ring fire gathers toward the center direction of the burner to increase the firepower area of ​​the inner ring fire. In addition, an ignition hole is provided on the outer ring wall of the first fire cover. Outer ring fire holes arranged at intervals in the circumferential direction are provided on the inner ring wall of the second fire cover 32, so that the flame of the outer ring fire gathers toward the center direction of the burner.

[0047] During installation, the igniter 1 is installed on the top of the base 2 and abuts against the top of the second gas outlet seat, the first gas outlet seat 211 is connected to the gas inlet end of the first ejector tube 12, and the second gas outlet seat is connected to the gas inlet end of the corresponding second ejector tube. The first fire cover 31 is arranged on the top of the igniter and covers the top opening of the first air cavity 112, and the second fire cover 32 is arranged on the top of the igniter and covers the top opening of the second air cavity 113. The ignition assembly 4 is arranged between the first air cavity 112 and the second air cavity, and its lower end is connected to the base 2, and the upper end extends to the outside of the side wall of the first fire cover 31, which is used to ignite the gas ejected from the first fire cover 31, and is also used to detect the burning flame at the first fire cover 31.

[0048] refer to Figure 4-6 In this embodiment, the high end of the bottom of the igniter body 11 is in surface contact with the second air outlet seat 212, and a distance is left between the high end of the bottom of the igniter body 11 and the top of the first air outlet seat 211, so that air can pass through this distance, which is more convenient for the first and second ejection tubes to eject primary air. A positioning structure is provided between the low end of the bottom of the igniter body 11 and the top surface of the base 2, so as to position the igniter 1 on the base 2 and prevent the igniter 1 from rotating relative to the base 2. In addition, a gap is left between the low end of the bottom of the igniter body 11 and the top surface of the base 2, so that secondary air can enter the middle air inlet of the secondary air channel through the gap.

[0049] The positioning structure includes a positioning column 23 and a positioning hole. Two positioning protrusions 25 extending downward are integrally formed on the lower side of the bottom of the fire divider body 11. A positioning hole opening downward is provided on the positioning protrusion 25. A positioning column 23 is convexly provided at the position of the positioning hole corresponding to the top surface of the base 2. The positioning column 23 is inserted into the corresponding positioning hole, and the positioning protrusion 25 is in contact with or gap-fitted with the top surface of the base 2 to ensure that there is a gap between the lower end of the bottom of the fire divider body 11 and the top surface of the base 2. Furthermore, a support platform 24 extending outward is provided in the circumferential direction of the lower end of the positioning column 23. The support platform 24 is in surface contact with the positioning protrusion 25 of the fire divider 1, so that the fire divider 1 can be installed on the base 2 more stably, and at the same time, the gap between the lower end of the bottom of the fire divider body 11 and the top surface of the base 2 can be increased.

[0050] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fire distributor, characterized in that: include: A fire divider body (11) having a central cavity (111) opened at the top and bottom and a first air cavity (112) opened upward, wherein the central cavity (111) is arranged at the center of the fire divider body (11), and the first air cavity (112) is arranged at the periphery of the central cavity (111) and has a first end and a second end arranged oppositely; and The first ejector tube (12) is transversely arranged at the bottom of the ignition divider body (11); the air inlet end of the first ejector tube (12) is located at the bottom of the first end of the first air cavity (112); the air outlet end spans the bottom of the central cavity (111) and is connected to the second end of the first air cavity (112); the bottom opening of the central cavity (111) is divided into two parts by the first ejector tube (12).

2. A fire distributor according to claim 1, characterized in that: Side openings (121) are respectively provided on two opposite side walls of the first ejector tube (12); the side openings (121) are located below the central cavity (111) and are in communication with a bottom opening of the central cavity (111).

3. A fire distributor according to claim 1, characterized in that: A premixing chamber (1121) extending downward and opening upward is provided at the bottom of the second end of the first air cavity (112); an air outlet end of the first ejector tube (12) penetrates the inner annular wall of the premixing chamber (1121), and is connected to the first air cavity (112) through the premixing chamber (1121).

4. A fire distributor according to claim 1, characterized in that: An annular boss (1112) extending toward the interior of the central cavity (111) is provided in the circumferential direction of the cavity wall of the central cavity (111), and a positioning notch (1113) is provided on the annular boss (1112).

5. A fire distributor according to any one of claims 1 to 4, characterized in that: The ignition divider body (11) also has a second air cavity (113) which is open upwards, and the second air cavity (113) is arranged at the periphery of the first air cavity (112); at least one second ejector tube (13) is arranged at the bottom of the ignition divider body (11), and the air inlet end of at least one second ejector tube (13) is connected to the bottom of the first air cavity (112), and the air outlet end is connected to the second air cavity (113); the first ejector tube (12) and the second ejector tube (13) are arranged in parallel and in the same direction or in opposite directions.

6. A fire distributor according to claim 5, characterized in that: The air inlet end of the first ejector tube (12) extends outward to the bottom of the second air cavity (113) and is fixedly connected to the bottom of the second air cavity (113).

7. The ignition distributor according to claim 5, characterized in that: An upwardly open air cavity (114) is formed between the second air cavity (113) and the first air cavity (112), and a secondary air passage is provided at the bottom of the air cavity (114) and is located outside the first ejector tube (12) and is connected to the air cavity (114).

8. A fire distributor according to claim 7, characterized in that: It also comprises a limit support (14), wherein the limit support (14) is arranged in the secondary air passage and is fixedly connected to the second ejector tube (13), and an assembly hole (141) is provided on the limit support (14).

9. A fire distributor according to claim 8, characterized in that: The number of the second ejector tubes (13) is two, and the two second ejector tubes (13) are respectively arranged on two opposite outer sides of the first ejector tube (12); The position limiting support (14) is arranged between the two second ejector tubes (13) and comprises two connecting arms, the fixed ends of the two connecting arms are respectively fixedly connected to the two second ejector tubes (13), and the assembly hole (141) is formed between the free ends of the two connecting arms.

10. An upper air inlet inner flame burner, characterized in that: include: A fire distributor as claimed in any one of claims 1 to 9; as well as A base (2) is arranged at the bottom of the ignition distributor, and a first air outlet seat (211) extending upward is provided on the top surface of the base (2), wherein the first air outlet seat (211) is connected to the air inlet end of the first ejector tube (12).

11. The upward air inlet inner flame burner according to claim 10, characterized in that: A spacing is left between the top of the first air outlet seat (211) and the higher end of the bottom of the ignition divider body (11); and / or a positioning structure is provided between the lower end of the bottom of the ignition divider body (11) and the top surface of the base (2).

Images