Combustion head, combustor and water heater

Abstract

The utility model belongs to the technical field of combustion devices, and particularly discloses a combustion head, a combustor and a water heater. The combustion head comprises a combustion head body and a plurality of fire hole sets. The multiple fire hole sets are arranged in the length direction of the combustion head body at intervals, and each fire hole set comprises a first fire hole pair and a second fire hole pair which are arranged in the length direction of the combustion head body at intervals. The first fire hole pair comprises two first fire holes which are symmetrical along the center line in the length direction of the combustion head body and distributed at intervals, and the second fire hole pair comprises two second fire holes which are symmetrical along the center line in the length direction of the combustion head body and distributed at intervals. The ends, away from the center line in the length direction of the combustion head body, of the second fire holes extend to penetrate through the side wall of the combustion head body and form flame stabilizing holes. The machining steps are simple.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion devices, in particular to a combustion head, a burner and a water heater. Background Art

[0002] A gas water heater, also known as a gas water boiler, is a gas appliance that uses gas as fuel and transfers heat to cold water flowing through a heat exchanger through combustion heating to achieve the purpose of preparing hot water.

[0003] The burner is one of the key components of a gas water heater. The gas is transported to the burner and mixed with air to form a mixed gas. The burner head is provided with a fire hole. The mixed gas burns at the burner head. The heat generated by the combustion can heat the water to increase the water temperature and meet the user's demand for hot water.

[0004] like Figure 1 and Figure 2 As shown, in the prior art, a plurality of fire hole groups 11' are provided on the burner head 1', and four flame stabilizing holes 12' are provided on each fire hole group 11'. When processing the burner head 1' of this structure, it is necessary to process the plurality of fire holes and the flame stabilizing holes 12' of the fire hole group 11' one by one, which results in cumbersome processing steps and affects the processing efficiency. Utility Model Content

[0005] One of the technical problems solved by the utility model is to provide a burner head, which can effectively solve the technical problem of complicated processing of the burner head in the prior art.

[0006] The second technical problem solved by the present invention is to provide a burner which can effectively solve the technical problem of complicated processing of the combustion head of the burner in the prior art.

[0007] The thirtieth technical problem solved by the present utility model is to provide a water heater which can effectively solve the technical problem of complicated processing of the combustion head of the burner of the gas water heater in the prior art.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] Combustion head, including:

[0010] Burner head body;

[0011] A plurality of fire hole groups are arranged at intervals along the length direction of the burner head body, each of the fire hole groups includes a first fire hole pair and a second fire hole pair arranged at intervals along the length direction of the burner head body, the first fire hole pair includes two first fire holes that are symmetrical and spaced apart along the center line of the length direction of the burner head body, the second fire hole pair includes two second fire holes that are symmetrical and spaced apart along the center line of the length direction of the burner head body, the second fire hole extends from one end of the center line of the length direction of the burner head body to the side wall that passes through the burner head body and forms a flame stabilizing hole.

[0012] Compared with the background technology, the burner head of the utility model has the following beneficial effects:

[0013] When processing the second fire hole of the second fire hole pair of the fire hole group, the burner head extends one end of the second fire hole away from the center line of the length direction of the burner head body to the side wall that penetrates the burner head body, and directly forms a flame stabilizing hole at the side wall of the burner head body. That is, the flame stabilizing hole is directly formed while processing the fire hole group, avoiding the technical problem of the prior art that the fire hole group and the flame stabilizing hole need to be processed separately, resulting in cumbersome processing steps.

[0014] At the same time, the two first fire holes of the first fire hole pair are symmetrically and spaced apart along the midline of the length direction of the burner head body, that is, the two first fire holes are independent of each other and are not arranged through-connected; such an arrangement can avoid the technical problems of the first fire hole being too large, resulting in a decrease in the thermal intensity of the first fire hole, the flame being easily weak, and easy to bifurcate.

[0015] In one embodiment, each of the fire hole groups includes one second fire hole pair and a plurality of first fire hole pairs, and along the length direction of the burner head body, at least one first fire hole pair is disposed on each side of the second fire hole pair.

[0016] In one embodiment, the length of each of the first fire holes is the same.

[0017] In one embodiment, the interval between two adjacent groups of fire holes is 3.5 mm-4.5 mm.

[0018] In one embodiment, there are multiple pairs of first fire holes, and in each of the fire hole groups, the distance between two adjacent pairs of the first fire holes is 0.6 mm-1 mm; and / or

[0019] In each of the fire hole groups, the distance between adjacent first fire hole pairs and second fire hole pairs is 0.6 mm-1 mm.

[0020] In one of the embodiments, the width of the burner head body is no greater than 10.6 mm.

[0021] In one embodiment, the upper surface of the burner head body includes a first plate and a second plate arranged at an angle, the connection between the first plate and the second plate is the midline position of the length direction of the burner head body, the first plate and the second plate are arranged to form a V-shaped groove, and the depth of the V-shaped groove is 1.3mm-2mm.

[0022] The above second technical problem is solved by the following technical solution:

[0023] The burner comprises a burner body and the above-mentioned combustion head, wherein the combustion head is installed on the burner body.

[0024] Compared with the background technology, the burner described in the utility model has the following beneficial effects:

[0025] When processing the second fire hole of the second fire hole pair of the fire hole group, the burner head of the burner extends one end of the second fire hole away from the center line of the length direction of the burner head body to the side wall that penetrates the burner head body, and directly forms a flame stabilizing hole at the side wall of the burner head body. That is, the flame stabilizing hole is directly formed while processing the fire hole group, avoiding the technical problem of the prior art that the fire hole group and the flame stabilizing hole need to be processed separately, resulting in cumbersome processing steps.

[0026] At the same time, the two first fire holes of the first fire hole pair are symmetrically and spaced apart along the midline of the length direction of the burner head body, that is, the two first fire holes are independent of each other and are not arranged through-connected; such an arrangement can avoid the technical problems of the first fire hole being too large, resulting in a decrease in the thermal intensity of the first fire hole, the flame being easily weak, and easy to bifurcate.

[0027] In one of the embodiments, the burner includes a plurality of the combustion heads, and the plurality of the combustion heads are arranged at equal intervals, and a secondary air supply gap is formed between two adjacent combustion heads.

[0028] The third technical problem mentioned above is solved by the following technical solution:

[0029] The water heater comprises a shell and the above-mentioned burner, wherein the burner is installed in the shell.

[0030] Compared with the background technology, the water heater of the utility model has the following beneficial effects:

[0031] When processing the second fire hole of the second fire hole pair of the fire hole group, the burner head of the water heater extends one end of the second fire hole away from the center line of the length direction of the burner head body to the side wall that penetrates the burner head body, and directly forms a flame stabilizing hole at the side wall of the burner head body. That is, the flame stabilizing hole is directly formed while processing the fire hole group, avoiding the technical problem of the prior art that the fire hole group and the flame stabilizing hole need to be processed separately, resulting in cumbersome processing steps.

[0032] At the same time, the two first fire holes of the first fire hole pair are symmetrically and spaced apart along the midline of the length direction of the burner head body, that is, the two first fire holes are independent of each other and are not arranged through-connected; such an arrangement can avoid the technical problems of the first fire hole being too large, resulting in a decrease in the thermal intensity of the first fire hole, the flame being easily weak, and easy to bifurcate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a combustion head in the prior art;

[0034] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0035] Figure 3 A schematic diagram of the structure of a burner head provided in the first embodiment of the utility model;

[0036] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0037] Figure 5 for Figure 3 A top view of

[0038] Figure 6 for Figure 5 Schematic diagram of some structures;

[0039] Figure 7 for Figure 3 Side view of

[0040] Figure 8 for Figure 7 Schematic diagram of some structures;

[0041] Fig. 9 for Figure 7 Schematic diagram of the CC section;

[0042] Fig.10 A schematic diagram of the exploded structure of a burner provided in the second embodiment of the present utility model;

[0043] Fig.11 This is a top view of the burner provided in Example 2 of the utility model.

[0044] Description of labels:

[0045] Figure 1 and Figure 2 middle:

[0046] 1', combustion head; 11', fire hole group; 12', flame stabilizing hole;

[0047] Figure 3-Figure 11 middle:

[0048] 10. Burner body; 20. Secondary air supply gap;

[0049] 1. Burner head body; 11. First plate; 12. Second plate;

[0050] 2. Fire hole group; 21. First fire hole pair; 211. First fire hole; 22. Second fire hole pair; 221. Second fire hole; 23. Flame stabilizing hole. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] Embodiment 1

[0056] See also Figure 1 and Figure 2In the prior art, a plurality of fire hole groups 11' are provided on the burner head 1', and four flame stabilizing holes 12' are provided on each fire hole group 11'. When processing the burner head 1' with this structure, it is necessary to process the plurality of fire holes and the flame stabilizing holes 12' of the fire hole group 11' one by one, which results in complicated processing steps and affects the processing efficiency.

[0057] In the prior art, the fire hole group 11' includes five fire holes, and the five fire holes are in a structure of three long and two short, and each fire hole extends from one side of the center line of the length direction of the combustion head 1' to the other side of the center line; this results in a longer length of the fire hole, and then a larger area of ​​the fire hole. During the combustion process, the strength of the fire hole is likely to decrease, the flame is prone to be weak and easy to fork, and the flame is unstable, which may cause the water outlet temperature of the gas water heater to be unstable, affecting the user experience.

[0058] This embodiment provides a combustion head, which is applied to a burner of a gas water heater.

[0059] Specifically, see Figure 3 and Figure 4 The burner includes a combustion head body 1 and a plurality of fire hole groups 2.

[0060] A plurality of fire hole groups 2 are arranged at intervals along the length direction of the burner head body 1. Each fire hole group 2 includes a first fire hole pair 21 and a second fire hole pair 22 arranged at intervals along the length direction of the burner head body 1, the first fire hole pair 21 includes two first fire holes 211 symmetrically and spaced apart along the center line of the length direction of the burner head body 1, the second fire hole pair 22 includes two second fire holes 221 symmetrically and spaced apart along the center line of the length direction of the burner head body 1, and one end of the second fire hole 221 away from the center line of the length direction of the burner head body 1 extends to the side wall that passes through the burner head body 1 and forms a flame stabilizing hole 23.

[0061] Specifically, in Figure 4 In FIG. 1 , a dot-dash line m represents a center line of the burner head body 1 in the longitudinal direction.

[0062] Optionally, in this embodiment, the number of the fire hole groups 2 is 13. Of course, in other embodiments, the number of the fire hole groups 2 can also be other, which can be set as needed, and no excessive restrictions are made here.

[0063] In the burner head provided in this embodiment, when processing the second fire hole 221 of the second fire hole pair 22 of the fire hole group 2, the end of the second fire hole 221 away from the center line in the length direction of the burner head body 1 is extended to the side wall that passes through the burner head body 1, and the flame stabilizing hole 23 is directly formed at the side wall of the burner head body 1. That is, the flame stabilizing hole 23 is directly formed while processing the fire hole group 2, avoiding the technical problem of the prior art that the fire hole group and the flame stabilizing hole need to be processed separately, resulting in cumbersome processing steps.

[0064] At the same time, in the present embodiment, the two first fire holes 211 of the first fire hole pair 21 are symmetrically and spaced apart along the midline of the length direction of the burner head body 1, that is, the two first fire holes 211 are independent of each other and are not arranged through-connected; this arrangement can avoid the technical problems of the first fire hole 211 being too large, which may lead to a decrease in the thermal intensity of the first fire hole 211, a weak flame, and easy bifurcation.

[0065] Furthermore, in one embodiment, each fire hole group 2 includes a second fire hole pair 22 and a plurality of first fire hole pairs 21 , and along the length direction of the burner head body 1 , at least one first fire hole pair 21 is disposed on each side of the second fire hole pair 22 .

[0066] Such an arrangement enables the flame stabilizing holes 23 of each fire hole group 2 to effectively stabilize the flame of the fire hole group 2 , thereby ensuring the combustion stability of each fire hole group 2 .

[0067] In one embodiment, the length of each first flame hole 211 is the same. This arrangement can avoid the situation where the gas output of multiple first flame holes 211 is inconsistent under high power conditions, resulting in uneven flames.

[0068] More specifically, in this embodiment, the length of the second fire hole 221 is the length of the first fire hole 211 plus the length of the flame stabilizing hole 23. This arrangement can better adapt to high-power requirements, fully ensure that the gas output of all fire holes in the fire hole group 2 is basically the same, and ensure flame stability during combustion.

[0069] Furthermore, in one of the embodiments, the interval between two adjacent fire hole groups 2 is 3.5 mm-4.5 mm.

[0070] If the distance between two adjacent fire hole groups 2 is too large, it is not conducive to the fire transfer between the two adjacent fire hole groups 2; if the distance between two adjacent fire hole groups 2 is too small, it is easy for the two adjacent fire hole groups 2 to be connected, resulting in unstable combustion. The distance between two adjacent fire hole groups 2 is 3.5mm-4.5mm, which can facilitate the fire transfer between the fire hole groups 2 and ensure stable combustion.

[0071] Specifically, the interval between two adjacent fire hole groups 2 is: the dimension of the portion between the two fire hole groups 2 on the burner head body 1 along the length direction of the burner head body 1 .

[0072] For example, see Figure 5 and Figure 6 ,exist Figure 6The distance a represents the interval between two adjacent fire hole groups 2; optionally, a can be 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm or 4.5 mm. Preferably, a is 3.7 mm.

[0073] Further, in one embodiment, in each fire hole group 2, the distance between two adjacent first fire hole pairs 21 is 0.6 mm-1 mm; and / or

[0074] In each fire hole group 2, the distance between adjacent first fire hole pairs 21 and second fire hole pairs 22 is 0.6 mm-1 mm.

[0075] Specifically, in each fire hole group 2, the distance between two adjacent first fire hole pairs 21 is 0.6mm-1mm; in each fire hole group 2, the distance between adjacent first fire hole pairs 21 and second fire hole pairs 22 is 0.6mm-1mm. With this size setting, continuous flames of the fire holes can be prevented.

[0076] For example, see Figure 6 , Figure 6 b represents the distance between two adjacent first fire hole pairs 21 in each fire hole group 2 ; c represents the distance between the adjacent first fire hole pair 21 and the second fire hole pair 22 in each fire hole group 2 .

[0077] Optionally, b may be 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm. Optionally, c may be 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0078] Preferably, b is 0.8 mm; c is 0.8 mm.

[0079] Preferably, in one of the embodiments, the width of the burner head body 1 is not greater than 10.6 mm.

[0080] For example, see Figure 6 , d represents the width of the burner head body 1. Exemplarily, d may be 10.1 mm, 10.2 mm, 10.3 mm, 10.4 mm, 10.5 mm or 10.6 mm.

[0081] Preferably, d is 10.6 mm.

[0082] In the prior art, the width of the burner head body is 12.6 mm. The burner generally includes a plurality of burner heads arranged at intervals; a secondary air supply gap is formed between the burner head bodies of two adjacent burner heads to ensure stable combustion of the burner heads. When the burner size and the number of burner heads are constant, the larger the width of the burner head body, the smaller the width of the secondary air supply gap, and the smaller the secondary air supply amount.

[0083] In this embodiment, the width of the burner head body 1 is set to be no more than 10.6 mm; in this way, when the burner size and the number of burner heads are constant, the width of the secondary air replenishment gap becomes larger, and the secondary air replenishment amount is also increased, thereby improving the combustion stability of the burner head. At the same time, it is also possible to reduce the external dimensions of the burner head and the burner, thereby realizing a small-volume design of the product.

[0084] In this embodiment, the two first fire holes 211 of the first fire hole pair 21 are independent of each other and are not set through; at the same time, the two second fire holes 221 of the second fire hole pair 22 are independent of each other and are not set through; this results in that all the fire holes of the fire hole group 2 are small in size, the heat intensity of the fire holes is large, the gas flow rate is high, and the flame separation phenomenon is easy to occur, so it is necessary to set the flame stabilizing hole 23. If the independent flame stabilizing hole in the prior art is used, on the one hand, it will lead to cumbersome processing, and on the other hand, the independent flame stabilizing hole will be too close to the fire hole when it cooperates with the first fire hole 211 or the second fire hole 221, which is easy to cause continuous flame and local high temperature, which is not conducive to the service life of the burner.

[0085] The second fire hole 221 is extended at one end away from the midline of the length direction of the burner head body 1 to the side wall passing through the burner head body 1, and a flame stabilizing hole 23 is directly formed on the side wall of the burner head body 1. This arrangement can not only stabilize the flame root and gather the flame stabilizing effect of the flame cutters on both sides, but also reduce the processing difficulty.

[0086] Specifically, see Figure 7 and Figure 8 When the flame stabilizing hole 23 is formed, if the depth of the flame stabilizing hole 23 penetrating the side wall of the burner body 1 is too shallow, it is not conducive to stabilizing the flame root; if the flame stabilizing hole 23 penetrates too deep, it will cause the flame stabilizing hole 23 to be close to the burner cavity, which is prone to flashback.

[0087] Preferably, the flame stabilizing hole 23 penetrates the side wall of the burner head body 1 to a depth of 1.5 mm to 2 mm, which can avoid flashback and stabilize the flame root.

[0088] Specifically, see Figure 8 ,exist Figure 8Here, e represents the depth of the flame stabilizing hole 23 penetrating the side wall of the burner head body 1, and e is 1.5 mm-2 mm. Optionally, e can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm or 2 mm. Preferably, e is 1.5 mm.

[0089] See also Figure 7-Figure 9 In one embodiment, the upper surface of the burner head body 1 includes a first plate 11 and a second plate 12 arranged at an angle, and the connection between the first plate 11 and the second plate 12 is the midline position of the length direction of the burner head body 1. The first plate 11 and the second plate 12 are arranged to form a V-shaped groove, and the depth of the V-shaped groove is 1.3mm-2mm.

[0090] For example, see Fig. 9 , Fig. 9 In the figure, f represents the depth of the V-shaped groove. f is 1.3 mm to 2 mm. Optionally, f can be 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm or 2 mm.

[0091] Specifically, the burner head is applied to high-power burners. When other structures of the gas water heater remain unchanged, the power of the burner increases, which will cause the smoke to rise. After the V-shaped groove is designed and formed, the deeper the depth of the V-shaped groove, the better the flame stabilization effect; and the shallower the depth of the V-shaped groove, the more conducive to the supplement of secondary air. Setting the depth of the V-shaped groove to 1.3mm-2mm can take into account both the flame stabilization effect and the secondary air supplement. Preferably, f is 1.3mm, and the combustion effect of the burner is best under this size.

[0092] Embodiment 2

[0093] See also Fig.10 and Fig.11 This embodiment provides a burner, which includes a burner body 10 and a combustion head of the first embodiment, and the combustion head is installed on the burner body 10.

[0094] Specifically, the combustion head is welded and arranged on the outer shell of the burner body 10; the fuel gas is introduced into the inlet of the outer shell of the burner body 10 and finally burns at the fire hole group 2 of the combustion head.

[0095] In the burner provided in the embodiment, in the burner head of the burner, when processing the second fire hole 221 of the second fire hole pair 22 of the fire hole group 2, the end of the second fire hole 221 away from the center line in the length direction of the burner head body 1 is extended to the side wall that passes through the burner head body 1, and the flame stabilizing hole 23 is directly formed at the side wall of the burner head body 1. That is, the flame stabilizing hole 23 is directly formed while processing the fire hole group 2, avoiding the technical problem of cumbersome processing steps caused by the need to process the fire hole group and the flame stabilizing hole separately in the prior art.

[0096] The two first fire holes 211 of the first fire hole pair 21 are symmetrically and spaced apart along the midline of the length direction of the burner head body 1, that is, the two first fire holes 211 are independent of each other and are not set through; such a setting can avoid the technical problems of the first fire hole 211 being too large, which leads to a decrease in the thermal intensity of the first fire hole 211, the flame being easily weak, and easy to bifurcate.

[0097] The structure of the burner body 10 belongs to the prior art and will not be described in detail here.

[0098] Specifically, see Fig.11 The burner includes a plurality of combustion heads, which are arranged at equal intervals, and a secondary air supply gap 20 is formed between two adjacent combustion heads.

[0099] The burner head in this embodiment is the burner head in Embodiment 1. In the prior art, the width of the burner head body is 12.6 mm. The burner generally includes a plurality of burner heads arranged at intervals; a secondary air replenishment gap is formed between the burner head bodies of two adjacent burner heads to ensure stable combustion of the burner heads. When the burner size and the number of burner heads are constant, the larger the width of the burner head body, the smaller the width of the secondary air replenishment gap, and the smaller the secondary air replenishment amount.

[0100] In this embodiment, the width of the burner head body 1 is set to be no greater than 10.6 mm; in this way, when the burner size and the number of burner heads are constant, the width of the secondary air replenishment gap 20 becomes larger, and the secondary air replenishment amount also increases, thereby improving the combustion stability of the burner head.

[0101] The burner provided in this embodiment can adapt to greater power requirements. When the power increases, the CO content in the combustion process is too high, which will cause the smoke to exceed the standard. To avoid excessive smoke, in this embodiment, the depth of the V-shaped groove formed by the first plate 11 and the second plate 12 of the burner head is 1.3mm-2mm, and the secondary air supplement is improved, so that the direction of the smoke can be effectively controlled and the smoke performance can be optimized.

[0102] Embodiment 3

[0103] This embodiment provides a water heater. Specifically, the water heater is a gas water heater.

[0104] The water heater comprises a shell and also comprises the burner of the second embodiment, wherein the burner is installed in the shell.

[0105] The water heater provided in this embodiment has a burner disposed in its shell. In the combustion head of the burner, when processing the second fire hole 221 of the second fire hole pair 22 of the fire hole group 2, the end of the second fire hole 221 away from the center line of the length direction of the combustion head body 1 is extended to the side wall that passes through the combustion head body 1, and the flame stabilizing hole 23 is directly formed at the side wall of the combustion head body 1. That is, the flame stabilizing hole 23 is directly formed while processing the fire hole group 2, avoiding the technical problem of the prior art that the fire hole group and the flame stabilizing hole need to be processed separately, resulting in cumbersome processing steps.

[0106] The two first fire holes 211 of the first fire hole pair 21 are symmetrically and spaced apart along the midline of the length direction of the burner head body 1, that is, the two first fire holes 211 are independent of each other and are not set through; such a setting can avoid the technical problems of the first fire hole 211 being too large, which leads to a decrease in the thermal intensity of the first fire hole 211, the flame being easily weak, and easy to bifurcate.

[0107] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. Combustion head, characterized in that: include: Burner head body (1); A plurality of fire hole groups (2), wherein the plurality of fire hole groups (2) are arranged at intervals along the length direction of the burner head body (1), and each of the fire hole groups (2) comprises a first fire hole pair (21) and a second fire hole pair (22) arranged at intervals along the length direction of the burner head body (1), wherein the first fire hole pair (21) comprises two first fire holes (211) which are symmetrically and spaced apart along the center line of the length direction of the burner head body (1), and the second fire hole pair (22) comprises two second fire holes (221) which are symmetrically and spaced apart along the center line of the length direction of the burner head body (1), and the second fire hole (221) extends from one end of the center line of the length direction of the burner head body (1) to a side wall that passes through the burner head body (1) and forms a flame stabilizing hole (23).

2. The burner head according to claim 1, characterized in that Each of the fire hole groups (2) comprises one second fire hole pair (22) and a plurality of first fire hole pairs (21), and along the length direction of the burner head body (1), at least one first fire hole pair (21) is arranged on each side of the second fire hole pair (22).

3. The burner head according to claim 1, characterized in that The length of each of the first fire holes (211) is the same.

4. The burner head according to claim 1, characterized in that The interval between two adjacent fire hole groups (2) is 3.5 mm to 4.5 mm.

5. The burner head according to claim 1, characterized in that The number of the first fire hole pairs (21) is plural, and in each of the fire hole groups (2), the distance between two adjacent first fire hole pairs (21) is 0.6 mm-1 mm; and / or In each of the fire hole groups (2), the distance between adjacent first fire hole pairs (21) and second fire hole pairs (22) is 0.6 mm-1 mm.

6. The burner head according to claim 1, characterized in that The width of the burner head body (1) is no greater than 10.6 mm.

7. The burner head according to any one of claims 1 to 6, characterized in that: The upper surface of the burner head body (1) comprises a first plate (11) and a second plate (12) which are arranged at an angle, wherein the connection point between the first plate (11) and the second plate (12) is the midline position in the length direction of the burner head body (1), and the first plate (11) and the second plate (12) are arranged to form a V-shaped groove, and the depth of the V-shaped groove is 1.3 mm-2 mm.

8. A burner, comprising a burner body (10), characterized in that: It also comprises a burner head as claimed in any one of claims 1 to 7, wherein the burner head is mounted on the burner body (10).

9. The burner according to claim 8, characterized in that The burner comprises a plurality of the burner heads, which are arranged at equal intervals, and a secondary air supply gap (20) is formed between two adjacent burner heads.

10. A water heater comprising a housing, characterized in that It also includes a burner as claimed in claim 8 or 9, wherein the burner is installed in the housing.

Images