Fire hole plate, burner and gas water heater

Abstract

The utility model relates to a water heater and discloses a fire hole plate, a burner and a gas water heater, a plurality of fire hole groups are arranged on the top wall of the fire hole plate, the plurality of fire hole groups are arranged at intervals along the length direction of the fire hole plate, and the fire hole groups comprise a first fire hole pair, a second fire hole pair and a flame stabilizing hole pair which are arranged at intervals along the length direction of the fire hole plate. A pair of first fire hole pairs and a pair of second fire hole pairs are distributed on the two sides of the flame stabilizing hole pairs in the length direction of the fire hole plate; the two first fire holes, the two second fire holes and the two flame stabilizing holes are symmetrically distributed at intervals along the center line in the length direction of the fire hole plate, and the length of the first fire holes is larger than that of the second fire holes and smaller than that of the flame stabilizing holes. The flame stabilizing holes are long, the flame stabilizing effect can be achieved, the flowing speeds of premixed gas flowing out of the first fire holes, the second fire holes and the flame stabilizing holes are different, the flame stability can be improved, the tempering and resonance phenomena are reduced, combustion is more sufficient, flame uniformity is good, and flames are more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a flame hole plate, a burner and a gas water heater. Background Art

[0002] The burner is the core component of a gas water heater, and its quality determines the performance of the whole machine, especially the combustion condition and flue gas emission, etc. The burners of existing gas water heaters include a plurality of flame hole plates. A plurality of flame hole groups are formed on the top walls of the flame hole plates ( Figure 1 The part circled by the dotted line in the figure is a flame hole group). Each flame hole group includes a plurality of flame hole pairs arranged at intervals along the length direction of the flame hole plate. The flame hole pairs include two flame holes symmetrically arranged at intervals along the middle line in the length direction of the flame hole plate ( Figure 1 the direction indicated by the arrow in the figure), and the lengths of the flame holes formed on the top walls of the flame hole plates are the same. In addition, flame stabilizing holes are formed on the top walls of the flame hole plates. The flame stabilizing holes extend outward from the outer ends of the middle flame holes and penetrate through the tops of the side walls of the flame hole plate bodies. This design can directly form the flame stabilizing holes while processing the flame holes. Therefore, the processing of the flame holes and the flame stabilizing holes on the top walls of the flame hole plates can be simplified. And because the two flame holes in a flame hole pair are arranged at intervals, the problem that the flame is in a weak state and is prone to bifurcation due to too large a flame hole area can be solved.

[0003] However, in the above-mentioned flame hole plate, since the lengths of the flame holes are equal, the stability of the flame is poor, especially in high-power gas water heaters, and the performance is even worse. For example, flashback may occur during combustion, resonance may be generated, or incomplete combustion may cause the carbon monoxide in the flue gas to exceed the standard. Summary of the Utility Model

[0004] One of the technical problems to be solved by the utility model is to provide a flame hole plate, which effectively solves the problem of poor flame stability caused by the equal lengths of the flame holes on the flame hole plate in the prior art. Especially in high-power gas water heaters, flashback may occur during combustion, resonance may be generated, or incomplete combustion may cause the carbon monoxide in the flue gas to exceed the standard.

[0005] Another technical problem to be solved by the utility model is to provide a burner, which effectively solves the problem of poor flame stability caused by the equal lengths of the flame holes on the flame hole plate of the burner in the prior art. Especially in high-power gas water heaters, flashback may occur during combustion, resonance may be generated, or incomplete combustion may cause the carbon monoxide in the flue gas to exceed the standard.

[0006] The third technical problem solved by the present utility model is to provide a gas water heater, which effectively solves the problem of poor flame stability caused by the equal length of the flame holes on the flame hole plate of the burner in the prior art. Especially in high-power gas water heaters, problems such as flashback, resonance during combustion, or incomplete combustion resulting in excessive carbon monoxide in the flue gas may occur.

[0007] The above first technical problem is solved by the following technical solutions:

[0008] A flame hole plate, on the top wall of the flame hole plate, a plurality of flame hole groups are provided. The plurality of flame hole groups are arranged at intervals along the length direction of the flame hole plate. The flame hole group includes a first flame hole pair, a second flame hole pair, and a flame stabilizing hole pair arranged at intervals along the length direction of the flame hole plate. Along the length direction of the flame hole plate, a pair of the first flame hole pairs and a pair of the second flame hole pairs are distributed on both sides of the flame stabilizing hole pair; the first flame hole pair, the second flame hole pair, and the flame stabilizing hole pair respectively include two first flame holes, two second flame holes, and two flame stabilizing holes. The two first flame holes, the two second flame holes, and the two flame stabilizing holes are symmetrically and spaced apart along the midline of the length direction of the flame hole plate. The length of the first flame hole is greater than the length of the second flame hole and less than the length of the flame stabilizing hole.

[0009] The flame hole plate of the present utility model has the following beneficial effects compared with the background technology:

[0010] Along the length direction of the flame hole plate, a pair of the first flame hole pairs and a pair of the second flame hole pairs are distributed on both sides of the flame stabilizing hole pair, and the length of the first flame hole in the first flame hole pair is greater than the length of the second flame hole in the second flame hole pair and less than the length of the flame stabilizing hole, so that there is a flow velocity difference in the premixed gas flowing out from the first flame hole, the second flame hole, and the flame stabilizing hole. Therefore, the flame stability can be improved, flashback and resonance phenomena can be reduced, and the phenomenon of excessive carbon monoxide in the flue gas caused by incomplete combustion can be reduced. In addition, since the length of the flame stabilizing hole pair is relatively long, the gas outlet area is large, and the flame gas flow velocity is small, the first flame hole pair and the second flame hole pair on both sides can be stabilized. Moreover, since the two first flame holes, the two second flame holes, and the two flame stabilizing holes are symmetrically and spaced apart along the midline of the length direction of the flame hole plate, the uniformity of the flame is good and it can be more stable.

[0011] In one embodiment, the distance between two adjacent fire hole groups is 2 mm to 4 mm; and / or, the first fire hole pair, the second fire hole pair, and the flame stabilizing hole pair are collectively referred to as fire hole pairs, and the distance between two adjacent fire hole pairs is 0.5 mm to 1.2 mm, and / or, the inner ends of the first fire holes, the inner ends of the second fire holes, and the inner ends of the flame stabilizing holes are equidistant from the midline in the length direction of the fire hole plate, and the distance L between the inner ends of the two first fire holes in the width direction of the fire hole plate is 0.5 mm to 2 mm.

[0012] In one embodiment, the first fire hole is 0.5 mm to 1.5 mm longer than the second fire hole, and the flame stabilizing hole is 0.2 mm to 2 mm longer than the first fire hole.

[0013] In one embodiment, in the same fire hole group, the first fire hole pairs and the second fire hole pairs on both sides of the flame stabilizing hole pair are symmetrically distributed, the second fire hole pair is located between the first fire hole pair and the flame stabilizing hole pair, and the outer end of the flame stabilizing hole faces away from the midline in the length direction of the fire hole plate and penetrates through the top of the side wall of the fire hole plate.

[0014] The above second technical problem is solved by the following technical solutions:

[0015] A burner includes a burner body and a plurality of the aforementioned fire hole plates. The burner body includes a housing and a plurality of fire rows arranged side by side and spaced apart in the housing. The plurality of fire hole plates are respectively installed on the plurality of fire rows in a position corresponding manner, and an air supplement channel is provided between two adjacent fire hole plates.

[0016] Compared with the background art, the burner of the present utility model has the following beneficial effects:

[0017] Along the length direction of the fire hole plate, a pair of first fire hole pairs and a pair of second fire hole pairs are distributed on both sides of the flame stabilizing hole pair. The flame stabilizing holes in the flame stabilizing hole pair can play a flame stabilizing effect, and the length of the first fire holes in the first fire hole pair is greater than the length of the second fire holes in the second fire hole pair and less than the length of the flame stabilizing holes, so that there is a flow velocity difference in the premixed gas flowing out of the first fire holes, the second fire holes, and the flame stabilizing holes. Therefore, the flame stability can be improved, the flashback and resonance phenomena can be reduced, and the phenomenon of excessive carbon monoxide in the flue gas caused by incomplete combustion can be reduced. In addition, due to the relatively long length and large outlet area of the flame stabilizing hole pair, the flame gas flow velocity is small, so it can play a flame stabilizing effect on the first fire hole pair and the second fire hole pair on both sides. Moreover, since the two first fire holes, the two second fire holes, and the two flame stabilizing holes are symmetrically and spaced apart along the midline in the length direction of the fire hole plate, the uniformity of the flame is good and it can be more stable.

[0018] In one embodiment, the flame hole plate is installed on the burner row of the burner body, and the side wall of the burner row bulges away from the side wall of the flame hole plate body corresponding to the flame stabilizing holes, so as to form a flame stabilizing cavity between the side wall of the burner row and the side wall of the flame hole plate body.

[0019] In one embodiment, the top of the air baffle is offset towards the center of the burner body relative to its bottom, and the position of the top is higher than the position of the top surface of the flame hole plate.

[0020] In one embodiment, the burner further includes two air baffles fixed on the inner side wall of the housing, and the two air baffles are oppositely arranged outside the two ends of the burner row.

[0021] In one embodiment, the burner further includes a lower baffle, the lower baffle is installed at the bottom of the burner body, and a plurality of air inlet holes are formed in the lower baffle corresponding to the air supplementing channel, and the air inlet holes communicate with the air supplementing channel.

[0022] The above third technical problem is solved by the following technical solutions:

[0023] A gas water heater includes a housing, and further includes the aforementioned burner, and the burner is installed in the housing.

[0024] The gas water heater of the present utility model has the following beneficial effects compared with the background technology:

[0025] Along the length direction of the flame hole plate, a pair of first flame hole pairs and a pair of second flame hole pairs are distributed on both sides of the flame stabilizing hole pair. The flame stabilizing holes in the flame stabilizing hole pair can play a flame stabilizing effect, and the length of the first flame holes in the first flame hole pair is greater than the length of the second flame holes in the second flame hole pair and less than the length of the flame stabilizing holes, so that there is a flow velocity difference in the premixed gas flowing out from the first flame holes, the second flame holes, and the flame stabilizing holes. Therefore, the flame stability can be improved, the flashback and resonance phenomena can be reduced, and the phenomenon of excessive carbon monoxide in the flue gas caused by incomplete combustion can be reduced. In addition, due to the long length and large air outlet area of the flame stabilizing hole pair, the flame gas flow velocity is small, so the flame stabilizing effect can be exerted on the first flame hole pair and the second flame hole pair on both sides. Furthermore, since the two first flame holes, the two second flame holes, and the two flame stabilizing holes are symmetrically and spaced along the center line in the length direction of the flame hole plate, the uniformity of the flame is good and the flame can be more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a three-dimensional schematic diagram of the flame hole plate in the prior art;

[0028] Figure 2 It is a top view schematic diagram of the burner in the embodiment of the present invention;

[0029] Figure 3 It is a side view of the burner in the embodiment of the present invention;

[0030] Figure 4 It is a bottom view of the burner in the embodiment of the present invention;

[0031] Figure 5 It is an internal schematic diagram of the burner in the embodiment of the present invention;

[0032] Figure 6 For Figure 5 The enlarged view at position E in;

[0033] Figure 7 It is a three-dimensional exploded schematic diagram of the burner in the embodiment of the present invention;

[0034] Figure 8 It is a partial top view enlarged diagram of the flame hole plate in the embodiment of the present invention;

[0035] Figure 9 For Figure 7 The enlarged view at position D in;

[0036] Figure 10 It is a three-dimensional combined schematic diagram of the burner row and the flame hole plate in the embodiment of the present invention;

[0037] Figure 11 For Figure 10 The enlarged view at position F in.

[0038] Explanation of reference numerals:

[0039] A, Burner; 1, Burner body; 10, Outer shell; 11, Burner grate; 111, Flame stabilization chamber; 1111, Wind baffle; 1112, Bridging plate; 12, Air baffle; 121, Top; 1211, Convex hull; 122, Bottom; 1221, Clamping plate; 12211, Card slot; 13, Lower baffle; 131, Air inlet hole; 2, Burner hole plate; 21, First burner hole; 22, Second burner hole; 23, Flame stabilization hole. Detailed implementation

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present application.

[0042] The terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0043] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0044] Embodiment 1

[0045] As Figures 2 to 11 shown, this embodiment provides a burner hole plate 2, and a plurality of burner hole groups are opened on the top wall of the burner hole plate 2 ( Figure 8It shows a group of flame holes). Multiple groups of flame holes are arranged at intervals along the length direction of the flame hole plate 2. The group of flame holes includes a first pair of flame holes, a second pair of flame holes, and a flame stabilizing hole pair that are arranged at intervals along the length direction of the flame hole plate 2. Along the length direction of the flame hole plate 2, a pair of first flame hole pairs and a pair of second flame hole pairs are distributed on both sides of the flame stabilizing hole pair. The first pair of flame holes includes two first flame holes 21 that are symmetric and spaced along the midline in the length direction of the flame hole plate 2. The second pair of flame holes includes two second flame holes 22 that are symmetric and spaced along the midline in the length direction of the flame hole plate 2. The flame stabilizing hole pair includes two flame stabilizing holes 23 that are symmetric and spaced along the midline in the length direction of the flame hole plate 2. The length of the first flame hole 21 is greater than the length of the second flame hole 22 and less than the length of the flame stabilizing hole 23.

[0046] For the flame hole plate 2 provided in this embodiment, along the length direction of the flame hole plate 2, a pair of first flame hole pairs and a pair of second flame hole pairs are distributed on both sides of the flame stabilizing hole pair, and the length of the first flame hole 21 is greater than the length of the second flame hole 22 and less than the length of the flame stabilizing hole 23, so that there is a flow velocity difference in the premixed gas flowing out of the first flame hole 21, the second flame hole 22, and the flame stabilizing hole 23. Therefore, the flame stability can be improved, flashback and resonance phenomena can be reduced, and the phenomenon of excessive carbon monoxide in the flue gas caused by incomplete combustion can be reduced. In addition, since the length of the flame stabilizing hole pair is relatively long, the air outlet area is large, and the flame gas flow velocity is small, the flame stabilizing effect can be achieved on the first flame hole pair and the second flame hole pair on both sides. Moreover, since the two first flame holes 21, the two second flame holes 22, and the two flame stabilizing holes 23 are symmetric and spaced along the midline in the length direction of the flame hole plate 2, the uniformity of the flame is good and the flame can be more stable.

[0047] In one embodiment, as Figure 7 and Figure 9 shown, the top wall of the flame hole plate 2 is V-shaped, and thus a V-shaped groove is formed at the top wall of the flame hole plate 2, and the opening of the V-shaped groove faces upward. The deeper the depth of the V-shaped groove, the better the flame stabilizing effect; and the shallower the depth of the V-shaped groove, the more conducive to the supplement of secondary air.

[0048] In one embodiment, as Figure 8As shown, the first pair of flame holes, the second pair of flame holes, and the flame stabilizing hole pair are parallel to each other, and the distances from the inner ends of the first flame holes 21, the inner ends of the second flame holes 22, and the inner ends of the flame stabilizing holes 23 to the midline in the length direction of the flame hole plate 2 are equal. The distance L between the inner ends of the two first flame holes 21 in the first pair of flame holes in the width direction of the flame hole plate 2 is 0.5 mm to 2 mm, preferably 1 mm. For the sake of simplicity in description, the first pair of flame holes, the second pair of flame holes, and the flame stabilizing hole pair are collectively referred to as the flame hole pair. The distance between two adjacent said flame hole pairs is 0.5 mm to 1.2 mm, preferably 0.8 mm. The distance between two adjacent said flame hole groups is 2 mm to 4 mm, preferably 3 mm. Here, the inner end refers to one end of the first flame hole 21, the second flame hole 22, and the flame stabilizing hole 23 facing the midline in the length direction of the flame hole plate 2, and the outer end is the end opposite to the inner end.

[0049] In one embodiment, the first flame hole 21 is 0.5 mm to 1.5 mm longer than the second flame hole 22, and the flame stabilizing hole 23 is 0.5 mm to 2 mm longer than the first flame hole 21. Such a design has a better flame stabilizing effect.

[0050] In one embodiment, as Figure 8 and Figure 9 shown, in the same flame hole group, the first pair of flame holes and the second pair of flame holes on both sides of the flame stabilizing hole pair are symmetrically distributed, and the second pair of flame holes is located between the first pair of flame holes and the flame stabilizing hole pair.

[0051] In one embodiment, the outer end of the flame stabilizing hole 23 faces away from the midline in the length direction of the flame hole plate 2 and penetrates through the top of the side wall of the flame hole plate 2. As Figure 11 shown, in this way, the processing of the flame stabilizing hole 23 can be facilitated. And since the flame stabilizing hole 23 penetrates through the top of the side wall of the flame hole plate 2, the length of the flame stabilizing hole 23 is relatively long, which can further reduce the height of the flame, make the mixed gas burn more fully, and further reduce the emission of waste gases such as carbon monoxide.

[0052] Embodiment Two

[0053] As Figures 2 to 11 shown, this embodiment provides a burner A, which includes a burner body 1 and also includes a plurality of flame hole plates 2 in Embodiment One. The burner body 1 includes a housing 10 and a plurality of fire grates 11 arranged side by side and spaced apart in the housing 10. A plurality of flame hole plates 2 are respectively installed on the plurality of fire grates 11 in a position corresponding manner, and an air supplement channel is provided between two adjacent flame hole plates 2.

[0054] In the burner A provided in this embodiment, along the length direction of the flame hole plate 2, a pair of first flame holes and a pair of second flame holes are distributed on both sides of the flame stabilizing hole pair, and the length of the first flame hole 21 is greater than the length of the second flame hole 22 and less than the length of the flame stabilizing hole 23, so that there is a flow velocity difference in the premixed gas flowing out from the first flame hole 21, the second flame hole 22, and the flame stabilizing hole 23. Therefore, the flame stability can be improved, the flashback and resonance phenomena can be reduced, and the phenomenon of excessive carbon monoxide in the flue gas caused by incomplete combustion can be reduced. In addition, since the length of the flame stabilizing hole pair is relatively long, the air outlet area is large, and the flame gas flow velocity is small, the flame stabilizing effect can be achieved on the first flame hole pair and the second flame hole pair on both sides thereof. Moreover, since the two first flame holes 21, the two second flame holes 22, and the two flame stabilizing holes 23 are symmetrically and spaced along the midline of the length direction of the flame hole plate 2, the uniformity of the flame is good and the flame can be more stable.

[0055] In one embodiment, as Figure 9 and Figure 11 shown, the side wall of the burner row 11 bulges towards the side wall away from the flame hole plate 2 at the position corresponding to the flame stabilizing hole 23, so as to form a flame stabilizing cavity 111 between the side wall of the burner row 11 and the side wall of the flame hole plate 2 (as Figure 9 shown), and the setting of the flame stabilizing cavity 111 can further improve the flame stabilizing effect.

[0056] In one embodiment, as Figure 8 and Figure 9 shown, the width of the flame stabilizing cavity 111 is greater than the width of the flame stabilizing hole 23, and the width direction of the flame stabilizing cavity 111 is parallel to the length direction of the flame hole plate 2.

[0057] In one embodiment, as Figure 9 shown, the top ends of the side walls of some of the flame stabilizing cavities 111 extend upward and protrude above the top end of the burner row 11 to form a wind shielding plate 1111, and the top ends of the side walls of some of the flame stabilizing cavities 111 first extend upward and protrude above the top end of the burner row 11 and then bend laterally to form a bridging plate 1112. The bridging plate 1112 can be used for flame transfer on the one hand and as a wind shielding plate 1111 on the other hand. The setting of the wind shielding plate 1111 can prevent the mixed gas from being blown away before being fully burned, thereby improving the combustion sufficiency of the mixed gas.

[0058] In one embodiment, the burner A further includes two air baffles 12 fixed to the inner side wall of the housing 10. Specifically, as Figure 5 and Figure 6As shown in the figure, two air baffles 12 are oppositely arranged outside the two ends of the burner 11. When the power of the water heater is increased, a large amount of secondary air is required for combustion. Adding air baffles 12 outside the two ends of the burner 11 can control the flow of air, forcing the air to supplement the combustion area, facilitating the secondary combustion of the mixed gas, improving the combustion efficiency of the gas water heater, and reducing the emission of harmful gases such as carbon monoxide.

[0059] In one embodiment, as Figure 6 shown, the top 121 of the air baffle 12 is offset towards the center of the burner A relative to the bottom 122, thereby forming a gap between the outer shell of the burner A body and the top 121 of the air baffle 12. Such a design can, on the one hand, produce a converging effect on the flame, and on the other hand, play a heat insulation role. As Figure 6 shown, the position of the top 121 of the air baffle 12 is higher than the position of the fire hole plate 2. There is a convex bump 1211 on the top 121, and the convex bump 1211 protrudes towards the corresponding position on the outer shell 10 to abut against the outer shell 10, thereby ensuring that an appropriate distance is always maintained between the top 121 and the outer shell 10. As Figure 7 shown, the bottom end of the bottom 122 is bent towards the center side of the burner to form a clamping plate 1221, and a plurality of clamping slots 12211 are spaced apart on the clamping plate 1221, and the clamping slots 12211 are clamped with the end of the burner 11.

[0060] In one embodiment, the burner A further includes a lower baffle 13. The lower baffle 13 is installed at the bottom of the burner body 1. A plurality of air inlet holes 131 are opened on the lower baffle 13 corresponding to the air supplement channels, and the air inlet holes 131 communicate with the air supplement channels so that air can enter the burner A to participate in combustion with the least resistance.

[0061] Embodiment 3

[0062] This embodiment provides a gas water heater, including a housing, and further including the burner A in Embodiment 2 (as Figures 2 to 11 shown), and the burner A is installed in the housing.

[0063] Along the length direction of the flame hole plate 2, a pair of first flame holes and a pair of second flame holes are distributed on both sides of the flame stabilizing hole pair. Moreover, the length of the first flame hole 21 is greater than the length of the second flame hole 22 and less than the length of the flame stabilizing hole 23, such that there is a flow velocity difference in the premixed gas flowing out from the first flame hole 21, the second flame hole 22, and the flame stabilizing hole 23. Therefore, the flame stability can be improved, the flashback and resonance phenomena can be reduced, and the phenomenon of excessive carbon monoxide in the flue gas caused by incomplete combustion can be reduced. In addition, since the length of the flame stabilizing hole pair is relatively long, the gas outlet area is large, and the flame gas flow velocity is small, the flame stabilizing effect can be achieved on the first flame hole pair and the second flame hole pair on both sides thereof. Furthermore, since the two first flame holes 21, the two second flame holes 22, and the two flame stabilizing holes 23 are symmetrically and spaced along the midline in the length direction of the flame hole plate 2, the uniformity of the flame is good and the flame can be more stable.

[0064] In the specific content of the above specific embodiment, each technical feature can be combined arbitrarily without contradiction. For the sake of concise description, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features does not exist in contradiction, it should be considered as the scope recorded in this specification.

[0065] The specific content of the above specific embodiment only expresses several embodiments of the present invention, and its description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A fire hole plate, characterized in that: A plurality of fire hole groups are provided on the top wall of the fire hole plate (2), and the plurality of fire hole groups are spaced apart along the length direction of the fire hole plate (2); the fire hole groups include a first fire hole pair, a second fire hole pair, and a flame stabilizing hole pair spaced apart along the length direction of the fire hole plate (2), and along the length direction of the fire hole plate, a pair of the first fire hole pair and a pair of the second fire hole pair are distributed on both sides of the flame stabilizing hole pair; the first fire hole pair, the second fire hole pair, and the flame stabilizing hole pair respectively include two first fire holes (21), two second fire holes (22), and two flame stabilizing holes (23), and the two first fire holes (21), the two second fire holes (22), and the two flame stabilizing holes (23) are symmetrically and spaced apart along the center line of the length direction of the fire hole plate (2), and the length of the first fire hole (21) is greater than the length of the second fire hole (22), and less than the length of the flame stabilizing hole (23).

2. The fire hole plate according to claim 1, characterized in that: The spacing between two adjacent groups of fire holes is 2 mm to 4 mm; and / or, the first fire hole pair, the second fire hole pair and the flame-stabilizing hole pair are collectively referred to as fire hole pairs, and the spacing between two adjacent pairs of fire holes is 0.5 mm to 1.2 mm; and / or, the inner ends of the first fire holes (21), the second fire holes (22) and the flame-stabilizing holes (23) are equidistant from the center line of the length direction of the fire hole plate (2), and the spacing L between the inner ends of the two first fire holes (21) in the width direction of the fire hole plate (2) is 0.5 mm to 2 mm.

3. The fire hole plate according to claim 2, characterized in that: The first fire hole (21) The flame stabilizing hole (23) is 0.5 mm to 1.5 mm longer than the second fire hole (22), and the flame stabilizing hole (23) is 0.5 mm to 2 mm longer than the first fire hole (21).

4. The fire hole plate according to any one of claims 1 to 3, characterized in that: In the same fire hole group, the first fire hole pair and the second fire hole pair on both sides of the flame stabilizing hole pair are symmetrically distributed, the second fire hole pair is located between the first fire hole pair and the flame stabilizing hole pair, the outer end of the flame stabilizing hole (23) faces away from the center line of the length direction of the fire hole plate (2) and passes through the top of the side wall of the fire hole plate (2).

5. A burner, characterized in that: The burner comprises a burner body (1), and a plurality of fire hole plates (2) according to any one of claims 1 to 4, wherein the burner body (1) comprises an outer shell (10), and a plurality of fire bars (11) arranged side by side and spaced apart in the outer shell (10), the plurality of fire hole plates (2) are arranged on the plurality of fire bars (11) in corresponding positions one by one, and an air supply channel is formed between two adjacent fire hole plates (2).

6. The burner according to claim 5, characterized in that The side wall of the fire bar (11) corresponding to the flame stabilizing hole (23) is arched in a direction away from the side wall of the fire hole plate (2), so as to form a flame stabilizing cavity (111) between the side wall of the fire bar (11) and the side wall of the fire hole plate (2).

7. The burner according to claim 6, characterized in that The burner (A) further comprises two air baffles (12) fixed on the inner side wall of the outer shell (10), and the two air baffles (12) are arranged opposite to each other on the outer sides of the two ends of the fire bar (11).

8. The burner according to claim 7, characterized in that The top (121) of the air baffle (12) is offset relative to the bottom (122) thereof toward the center of the burner body (1), and the position of the top (121) is higher than the position of the top surface of the fire hole plate (2).

9. The burner according to any one of claims 5 to 8, characterized in that: The burner (A) further comprises a lower baffle (13), wherein the lower baffle (13) is mounted on the bottom of the burner body (1), and a plurality of air inlet holes (131) are provided on the lower baffle (13) corresponding to the air supply channel, wherein the air inlet holes (131) are connected to the air supply channel.

10. A gas water heater, comprising a housing, characterized in that: It also comprises a burner (A) as claimed in any one of claims 5 to 9, wherein the burner (A) is installed in the shell.

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