Burner

Abstract

The present invention relates to a burner, the burner comprising: a housing having an opening on a first direction side; a fuel pipe penetratingly inserted into the housing; a fuel nozzle unit connected to the fuel pipe and provided to inject introduced fuel in a first direction; and a cover unit provided to cover the opening formed in the first direction side of the housing. The fuel nozzle unit comprises: a nozzle unit body extending along a second direction intersecting the first direction and disposed inside the housing, the interior of which is connected to the fuel pipe; and a fuel nozzle member protruding from the nozzle unit body in the first direction, communicating with the interior of the nozzle unit body, and including an internal flow path extending along the first direction. The cover unit may comprise: a cover unit body covering the opening; and an air nozzle member protruding from the cover unit body in a tubular shape along the first direction and having the fuel nozzle member disposed therein.

Description

burner

[0001] Cross-citation with related applications

[0002] This invention claims the benefit of priority from Korean Patent Application No. 10-2023-0197431, filed on December 29, 2023, and all contents of the document in that Korean Patent Application are incorporated herein by reference.

[0003] Technology field

[0004] The present invention relates to a burner.

[0005] A water heater is a device that heats water. A water heater can encompass a boiler, which heats water inside a container to heat a desired area, and a water heater, which discharges the heated water.

[0006] Water heaters heat water via burners. Among these, burners that use hydrogen as fuel primarily utilize a premixed structure, where air and hydrogen are premixed inside the fan and then introduced into the burner to form a hydrogen flame.

[0007] However, in the case of burners utilizing a hydrogen premixing method, there was a problem of a high risk of backfire because the combustion speed of hydrogen was faster than the flow rate of the mixed gas.

[0008] Additionally, hydrogen has a wide flammability range and low minimum ignition energy, so there is a high risk of explosion, and there is a problem of high nitrogen oxide (NOx) generation due to high temperature.

[0009] To solve these problems, one could consider using a diffusion flame burner, but this would require replacing the entire burner, which would increase costs and be inconvenient to install.

[0010] Therefore, there is a need to develop a burner that can utilize the burner housing as is and prevent backfire by utilizing a diffusion flame method.

[0011] The object of the present invention is to provide a burner capable of preventing backfire.

[0012] In one example, a burner includes a housing that is configured to allow air to flow into the interior and has an opening on a first direction side, a fuel pipe that is inserted through the housing and is configured to allow fuel to flow into the interior, a fuel nozzle portion that is connected to the fuel pipe and is configured to inject the introduced fuel in the first direction, and a cover portion that is configured to cover the opening formed on the first direction side of the housing, wherein the fuel nozzle portion includes a nozzle portion body that extends along a second direction intersecting the first direction and is disposed inside the housing and has an interior connected to the fuel pipe, and a fuel nozzle member that protrudes from the nozzle portion body along the first direction, is communicated with the interior of the nozzle portion body, and includes an internal passage that extends along the first direction, and wherein the cover portion includes a cover portion body that covers the opening and an air nozzle member that protrudes in a tubular shape from the cover portion body along the first direction and has the fuel nozzle member disposed inside it.

[0013] In another example, the fuel nozzle unit may further include an air passage hole formed to penetrate the nozzle unit body along the first direction and extending along the second direction.

[0014] In another example, in the nozzle body, when the area where the air passage hole is formed is called a passage area and the other area is called a non-pass area, the passage area is formed on the second direction and the opposite direction side of the non-pass area, and the fuel pipe can be connected to the non-pass area.

[0015] In another example, the air nozzle member may be formed in multiple pieces and arranged to overlap the passage area when viewed along the first direction.

[0016] In another example, when the direction intersecting the first direction and the second direction is referred to as a third direction, the air passage holes may be formed in multiple numbers and arranged along the third direction.

[0017] In another example, the burner may further include a distribution plate disposed within the housing and positioned on the opposite side of the first direction of the fuel nozzle portion, and having a plurality of through holes formed therein.

[0018] In another example, when the direction intersecting the first direction and the second direction is referred to as a third direction, the distribution plate may include a first distribution area in which a first through hole having a first diameter among the through holes is arranged, and a second distribution area in which a second through hole having a second diameter larger than the first diameter among the through holes is arranged in the third direction and the opposite direction of the first distribution area.

[0019] In another example, when viewed along the first direction, the distribution plate may be larger in size than the fuel nozzle portion.

[0020] In another example, the housing may include an air inlet opening that is open along the second direction and allows air to flow in along the second direction, and the air inlet opening may be located on the opposite side of the fuel nozzle portion in the first direction.

[0021] In another example, the housing may further include a guide region positioned on the second direction side of the air inlet opening and extending along the first direction to guide air introduced in the second direction to the first direction.

[0022] In another example, the guide region may include a first region extending in an inclined manner in the first direction with respect to the second direction, and a second region extending along the second direction from an end of the first region in the second direction.

[0023] In another example, the first region may have a degree of inclination that gradually decreases in the first direction relative to the second direction.

[0024] In another example, the second region may be spaced apart from the fuel nozzle portion along the first direction.

[0025] In another example, the housing may further include a pipe guide region extending along the first direction, penetrating the guide region, and having the fuel pipe arranged therein.

[0026] In another example, the fuel nozzle member may include a region whose diameter decreases downward.

[0027] According to the present invention, since the burner housing of the conventional premixing method can be utilized while applying the diffusion flame method, the backfire phenomenon can be prevented while reducing costs.

[0028] FIG. 1 is a drawing illustrating a burner according to Example 1 of the present invention.

[0029] Figure 2 is a drawing illustrating the burner of Figure 1.

[0030] FIG. 3 is a drawing showing a portion of the housing in FIG. 1 with the fuel nozzle portion exposed.

[0031] FIG. 4 is a drawing showing a burner according to Example 1 of the present invention with the cover removed.

[0032] Figures 5 and 6 are cutaway perspective views of a burner according to Example 1 of the present invention.

[0033] Figure 7 is a cutaway perspective view of a burner according to Example 2 of the present invention.

[0034] FIG. 8 is a drawing showing a burner according to Embodiment 2 of the present invention with a portion of the housing removed to reveal the distribution plate.

[0035] FIG. 9 is a drawing showing a distribution plate of a burner according to Example 3 of the present invention.

[0036] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When designating components in each drawing, identical components are given the same reference numerals, wherever possible, even if they appear in different drawings. Furthermore, when describing embodiments of the present invention, detailed descriptions of known components or functions will be omitted if they are deemed to hinder understanding of the embodiments of the present invention.

[0037] Example 1

[0038] FIG. 1 is a drawing illustrating a burner according to Embodiment 1 of the present invention. FIG. 2 is a drawing illustrating the burner of FIG. 1. FIG. 3 is a drawing illustrating a portion of the housing in FIG. 1 with the fuel nozzle portion removed so that it is exposed. FIG. 4 is a drawing illustrating a burner according to Embodiment 1 of the present invention with the cover portion removed. FIG. 5 and FIG. 6 are cutaway perspective views of the burner according to Embodiment 1 of the present invention.

[0039] The burner according to Embodiment 1 of the present invention may be a burner used in a boiler. Furthermore, the burner according to Embodiment 1 of the present invention may be a burner that utilizes hydrogen as fuel. However, the type of fuel is not limited thereto, and the user may use various types of combustible fuels as needed.

[0040] For convenience of explanation, a first direction (D1), a second direction (D2), and a third direction (D3) are defined. The second direction (D2) may be a direction intersecting the first direction (D1). The third direction (D3) may be a direction intersecting the first direction (D1) and the second direction (D2). For example, the first direction (D1) may be the direction in which a flame generated from a burner is ejected.

[0041] The burner may include a housing (100), a fuel pipe (200), a fuel nozzle portion (300), and a cover portion (400). The housing (100) may have an opening (110) on the first direction (D1) side, through which air may flow. In this case, the housing (100) may correspond to the structure of the housing (100) of a burner using a premixing method.

[0042] The fuel pipe (200) may be inserted through the housing (100). Fuel may be arranged to flow into the interior of the fuel pipe (200). For example, the fuel pipe (200) may extend along a first direction (D1) so that fuel may flow into the interior along the first direction (D1). However, the present invention is not limited thereto, and the shape of the fuel pipe (200) and the direction in which fuel flows through the fuel pipe (200) may have various modifications depending on the needs of the design, such as when the fuel pipe (200) extends along a third direction (D3).

[0043] The fuel nozzle unit (300) may be connected to the fuel pipe (200) and may be configured to inject the introduced fuel in a first direction (D1).

[0044] The fuel nozzle unit (300) may include a nozzle unit body (310) and a fuel nozzle member (320). The nozzle unit body (310) extends along the second direction (D2), is placed inside the housing (100), and its interior may be connected to a fuel pipe (200).

[0045] The fuel nozzle member (320) may protrude from the nozzle body (310) in a first direction (D1) and may be in communication with the interior of the nozzle body (310). The fuel nozzle member (320) may include an internal flow path extending along the first direction (D1). The fuel nozzle member (320) may include a region whose diameter decreases as it goes downward.

[0046] The cover part (400) may be provided to cover an opening (110) formed on the first direction (D1) side of the housing (100). The cover part (400) may include a cover part body (410) and an air nozzle member (420). The cover part body (410) may cover the opening (110). The cover part body (410) may include a region that is formed to protrude toward the first direction (D1). An air nozzle member (420) to be described later may be placed in the region.

[0047] The air nozzle member (420) may protrude in a tubular shape along the first direction (D1) from the cover body (410). A fuel nozzle member (320) may be arranged inside the air nozzle member (420).

[0048] The air nozzle member (420) may be a passage through which air is discharged. The fuel nozzle member (320) may be a passage through which fuel is discharged. As illustrated in FIG. 2, the burner according to Embodiment 1 of the present invention may have separate passages through which fuel is discharged and through which air is discharged. This may mean that the burner according to Embodiment 1 of the present invention is a diffusion flame burner.

[0049] In more detail, the air nozzle member (420) may be coaxial with the fuel nozzle member (320). This may mean that the central axis of the air nozzle member (420) corresponds to the central axis of the fuel nozzle member (320). The air nozzle member (420) may have a structure that protrudes in the first direction (D1) compared to the fuel nozzle member (320). This structure may be a structure generally used for stable flame formation in a diffusion flame method.

[0050] The fuel nozzle unit (300) may further include an air passage hole (330). The air passage hole (330) may be formed to penetrate the nozzle unit body (310) along a first direction (D1) and may extend along a second direction (D2). The air passage hole (330) may be a hole through which air introduced into the interior of the housing (100) passes.

[0051] Hereinafter, a pass area (311) and a non-pass area (312) are defined for explanation. The pass area (311) may be an area where an air passage hole (330) is formed in the nozzle body (310). The non-pass area (312) may be an area other than the pass area (311).

[0052] The passage area (311) may be formed on the second direction (D2) and the opposite direction side of the non-pass area (312). This may mean that the non-pass area (312) is positioned between the two passage areas (311). For example, the non-pass area (312) may be a central area of ​​the nozzle body (310). The fuel pipe (200) may be connected to the non-pass area (312). In addition, a plurality of fuel nozzle members (320) may be formed in the passage area (311).

[0053] The air passage holes (330) may be formed in multiple numbers and arranged along the third direction (D3). The air nozzle members (420) may be formed in multiple numbers and arranged to overlap the passage area (311) when viewed along the first direction (D1).

[0054] The housing (100) may further include an air inlet opening (120). The air inlet opening (120) may be an opening (110) that opens along the second direction (D2) and through which air is introduced along the second direction (D2). The air inlet opening (120) may be located on the opposite side of the first direction (D1) of the fuel nozzle unit (300).

[0055] The housing (100) may further include a guide region (130). The guide region (130) may be located on the second direction (D2) side of the air inlet opening (120). The guide region (130) may extend along the first direction (D1) to guide air introduced in the second direction (D2) to the first direction (D1).

[0056] The guide region (130) may include a first region (131) and a second region (132). The first region (131) may extend in a slanted manner in the first direction (D1) with respect to the second direction (D2). The degree to which the first region (131) is slanted in the first direction (D1) with respect to the second direction (D2) may gradually decrease.

[0057] The second region (132) may extend along the second direction (D2) from the end of the first region (131) on the second direction (D2). The second region (132) may be spaced apart from the fuel nozzle unit (300) along the first direction (D1).

[0058] The housing (100) may further include a pipe guide region (140). The pipe guide region (140) may extend along the first direction (D1) and penetrate the guide region (130). The pipe guide region (140) may be an region in which a fuel pipe (200) may be arranged.

[0059] For example, a pipe guide area (140) may be connected through a housing (100) of a premixed burner. Unlike the premixed burner, a diffusion flame burner requires a separate pipe for introducing hydrogen as fuel. Therefore, for this purpose, a pipe guide area (140) into which a fuel pipe (200) can be inserted may be additionally formed in the housing (100).

[0060] Hereinafter, the flow of fuel and air introduced into the burner according to Example 1 of the present invention through the above-described structure will be described in detail.

[0061] First, in the case of fuel, it flows in the first direction (D1) through the fuel pipe (200) and flows into the internal space of the nozzle body (310). The fuel flowing into the internal space of the nozzle body (310) is discharged to the outside through a plurality of fuel nozzle members (320).

[0062] In the case of air, it is introduced in the second direction (D2) through the air inlet opening (120). The air introduced in the second direction (D2) is guided in the first direction (D1) through the guide area (130). The air guided in the first direction (D1) passes through the air passage hole (330) in the first direction (D1) and ultimately passes through the plurality of air nozzle members (420).

[0063] Example 2

[0064] Fig. 7 is a cutaway perspective view of a burner according to Embodiment 2 of the present invention. Fig. 8 is a drawing showing a burner according to Embodiment 2 of the present invention with a portion of the housing removed to reveal a distribution plate.

[0065] Hereinafter, a burner according to Embodiment 2 of the present invention will be described with reference to FIGS. 7 and 8. The burner according to Embodiment 2 differs from the burner according to Embodiment 1 in the presence of a distribution plate. Components identical to or substantially equivalent to those of the burner according to Embodiment 1 are given identical or substantially equivalent drawing reference numerals, and detailed descriptions thereof are omitted.

[0066] The burner according to Example 2 may further include a distribution plate (500). The distribution plate (500) may be disposed within the housing (100) and positioned on the opposite side of the first direction (D1) of the fuel nozzle unit (300). A plurality of through holes (510) may be formed in the distribution plate (500). The distribution plate (500) may serve to evenly distribute air flowing into the housing (100). With the distribution plate (500) present, compared to a case where the distribution plate (500) is not present, air concentrated in the center of the housing (100) may be moved in the second direction (D2) and the opposite direction, and in the third direction (D3) and the opposite direction.

[0067] The burner according to Example 2 further includes a distribution plate (500), thereby having the effect of distributing air more evenly concentrated in the center, thereby evenly distributing air to a plurality of air nozzle members (420).

[0068] Example 3

[0069] Fig. 9 is a drawing illustrating a distribution plate of a burner according to Embodiment 3 of the present invention. Hereinafter, the burner according to Embodiment 3 of the present invention will be described with reference to Fig. 9. The burner according to Embodiment 3 differs from the burner according to Embodiment 2 in the arrangement of through holes. The same or equivalent drawing reference numerals are assigned to components identical or equivalent to those of the burner according to Embodiment 2, and a detailed description thereof is omitted.

[0070] The distribution plate (500') may include a first distribution area (501) and a second distribution area (502). The first distribution area (501) may be an area where a first through hole (511) having a first diameter among through holes is arranged. The second distribution area (502) may be an area where a second through hole (512) having a second diameter larger than the first diameter among through holes is arranged. The second distribution area (502) may be located in the third direction (D3) of the first distribution area (501) and in the opposite direction.

[0071] The above description is merely an illustrative illustration of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate, rather than limit, the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

Claims

1. A housing having an opening on the first direction side and allowing air to flow into the interior; A fuel pipe which is inserted through the housing and allows fuel to flow into the interior; A fuel nozzle unit connected to the fuel pipe and configured to inject the supplied fuel in a first direction; and Including a cover part provided to cover an opening formed on the first direction side of the housing, The above fuel nozzle part, A nozzle body extending along a second direction intersecting the first direction, positioned inside the housing and having an interior connected to the fuel pipe; It includes a fuel nozzle member that protrudes from the nozzle body in the first direction, communicates with the interior of the nozzle body, and includes an internal passage extending in the first direction. The above cover part, A cover body covering the above opening; and A burner comprising an air nozzle member that protrudes in a tubular shape along the first direction from the cover body and has the fuel nozzle member arranged inside.

2. In claim 1, The above fuel nozzle part, A burner further comprising an air passage hole formed to penetrate the nozzle body along the first direction and extending along the second direction.

3. In claim 2, In the above nozzle body, when the area where the air passage hole is formed is called the passage area, and the other area is called the non-passage area, The above-mentioned pass zone is formed on the second direction and the opposite direction side of the above-mentioned non-pass zone, The above fuel pipe is connected to the burner through the non-passing area.

4. In claim 3, The above air nozzle member is formed in multiple pieces, A burner, positioned so as to overlap the passage area when viewed along the first direction.

5. In claim 3, When the direction intersecting the first direction and the second direction is called the third direction, A burner wherein the above air passage holes are formed in a plurality and arranged along the third direction.

6. In claim 1, A burner further comprising a distribution plate disposed within the housing and positioned on an opposite side of the first direction of the fuel nozzle portion, the distribution plate having a plurality of through holes formed therein.

7. In claim 6, When the direction intersecting the first direction and the second direction is called the third direction, The above distribution board, A first distribution area in which a first through hole having a first diameter among the through holes is arranged; and A burner comprising a second distribution area, wherein a second through hole having a second diameter greater than the first diameter is arranged in the third direction and in the opposite direction of the first distribution area.

8. In claim 6, A burner in which, when viewed along the first direction, the distribution plate is larger in size than the fuel nozzle section.

9. In claim 1, The above housing, Including an air inlet opening that is opened along the second direction and through which air is introduced along the second direction; The burner, wherein the air inlet opening is located on the opposite side of the first direction of the fuel nozzle section.

10. In claim 9, The above housing, A burner further comprising a guide region positioned on the second direction side of the air inlet opening and extending along the first direction to guide air introduced in the second direction in the first direction.

11. In claim 10, The above guide area is, a first region extending in an inclined manner in the first direction with respect to the second direction; and A burner comprising a second region extending along the second direction from an end portion of the second direction side of the first region.

12. In claim 11, The above first area is, A burner in which the degree of inclination in the first direction with respect to the second direction gradually decreases.

13. In claim 11, The second region is a burner spaced apart from the fuel nozzle section in the first direction.

14. In claim 10, The above housing, A burner further comprising a pipe guide region extending along the first direction, penetrating the guide region, and having the fuel pipe arranged therein.

15. In claim 1, A burner, wherein the fuel nozzle member includes a region whose diameter becomes smaller as it goes downward.

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