Combustor and water heater comprising same

Abstract

The utility model provides a burner and a water heater including the same, including the casing and set up the burning plate on the top of casing, be equipped with the combustion component mixing chamber that mixes fuel gas and air in the casing, be equipped with a plurality of air inlet on the at least one side of casing, the air inlet corresponds with the external nozzle, the casing is equipped with first baffle at the air inlet, and the first baffle is equipped with second baffle at the air outlet. The first baffle comprises a first shielding part spaced from the first side face, the first shielding part at least partially shields the air inlet in the air inlet direction, and the first shielding part and the bottom face of the shell are arranged in a spaced mode. According to the burner and the water heater comprising the burner, gas with a certain mixing ratio is introduced into each gas inlet, and mutual influence of airflow among the gas inlets is avoided. A zigzag flowing mode is formed through the first baffle plate, so that the mixing time is prolonged, and the mixing is more sufficient; and the mixed gas is blocked at the gas inlet to form turbulent flow, so that the mixing uniformity is improved, the heat value of combustion is improved, and the combustion efficiency is improved.

Description

Technical Field

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

[0002] The burner is one of the core components of the water heater. Currently on the market, the burner technology solutions adopted by different companies mainly differ in structure and primary air ratio. Among them, in terms of structure, the traditional technology uses multiple fire grates to form a burner as a whole. After the gas enters the inner cavity of the burner, the gas diffuses unevenly to multiple fire grates. When the combustion effect of a single fire grate is debugged, when the other multiple fire grates are debugged synchronously, they often affect each other (that is, the flames will stick and shake). Such burners adopt a one-cavity-one-nozzle structure. In terms of primary air ratio, the traditional technology adopts a partial premixing method to maximize the intensity of combustion heat.

[0003] However, the combustion chamber height required by this type of burner consisting of multiple fire bars is relatively high, and the overall burner component size is relatively large. In the current market competition environment, the burner with a larger structure size is not conducive to the structural optimization of the whole water heater; when the heat load is large, the structure of the fire bar burner is relatively bulky; and it is difficult to install multiple fire bars. When the technical solution of partial premixed combustion is adopted, the heat intensity of the burner's fire hole and the combustion temperature will be subject to certain restrictions.

[0004] In the prior art, there is also a burner structure that mixes gas and air before burning to replace the burner structure composed of fire bars. For example, patent document CN102032572B discloses a burner, which includes a gas mixing chamber for mixing gas and air. After the gas and air are mixed, they flow to the cover plate (i.e., the combustion plate) to burn, and flames pass through the fire holes of the cover plate. However, the gas and air directly enter the gas mixing chamber through the guide pipe, and the mixing effect is poor, so the combustion efficiency is low. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the defect of low combustion efficiency of the burner of the water heater in the prior art, and to provide a burner and a water heater including the burner.

[0006] The utility model solves the above technical problems through the following technical solutions:

[0007] A burner, comprising a shell and a combustion plate arranged on the top of the shell, wherein a combustion component mixing chamber for mixing gas and air is arranged in the shell, and a plurality of through holes are arranged on the combustion plate.

[0008] A plurality of air inlets connected to the combustion component mixing chamber are provided on at least one side surface of the shell, and the air inlets correspond to the external nozzles. A first baffle is provided on the first side surface of the shell at the air inlet, and the first baffle includes a first shielding portion spaced apart from the first side surface, a projection of the first shielding portion on the first side surface along the air intake direction at least partially shields the air inlet, and the first shielding portion is spaced apart from the bottom surface of the shell.

[0009] In this scheme, the burner corresponds to the nozzle through the above-mentioned air inlet, and the gas ejected from the nozzle drives the surrounding air at a certain flow rate and speed to enter the combustion component mixing chamber at a certain mixing ratio for mixing. By configuring the number of nozzles to correspond to each air inlet one by one, each air inlet is fed with gas of a certain mixing ratio, thereby avoiding the mutual influence of airflows between multiple air inlets. Through the above-mentioned first baffle, on the one hand, the mixed gas forms a tortuous flow pattern from the air inlet to the combustion component mixing chamber, prolonging the mixing time and making the mixing more complete; on the other hand, the mixed gas is blocked at the air inlet to form turbulence (turbulence refers to the formation of airflows in different directions after the gas is blocked), and then flows into the mixing chamber together for further mixing, thereby improving the uniformity of mixing, improving the calorific value of combustion, and thus improving the combustion efficiency. When the shell is provided with air inlets and the first baffle of the above-mentioned structure on multiple sides, it is beneficial to improve the overall air intake efficiency of the burner; at the same time, the uniformity of mixing is further improved, thereby further improving the combustion efficiency.

[0010] Preferably, the first shielding portion is parallel to the first side surface.

[0011] In this solution, the first shielding portion is parallel to the first side surface, so that the first baffle forms a relatively regular structure, which is easy to manufacture and improves the effect of blocking airflow.

[0012] Preferably, the housing further comprises a second side surface opposite to the first side surface.

[0013] A second baffle is disposed on the inner wall of the second side surface. The second baffle is spaced apart from the first side surface. The second baffle is perpendicular or inclined to the second side surface. The height of the second baffle is not less than that of the first baffle.

[0014] In this solution, by setting a first baffle on the first side of the shell and a second baffle on the second side, the two baffles are arranged in the above manner, which further extends the path of the mixed gas flowing in the combustion component mixing chamber, undergoes two obstructions in succession, forms turbulence, and further improves the uniformity of mixing. Among them, the second baffle is perpendicular or inclined to the second side, which can effectively block the mixed gas flowing upward from the bottom surface of the shell; by the height of the second baffle is not less than the height of the first baffle, more mixed gas can be blocked to form a more uniform turbulence.

[0015] Preferably, a plurality of the second baffles are provided on the inner wall of the second side surface, and the heights of the plurality of the second baffles are unequal.

[0016] In this solution, by providing a plurality of second baffles of different heights on the inner wall of the second side surface of the shell, the airflow at different positions in the combustion component mixing chamber is blocked in different directions and to different degrees, which is beneficial to improving the uniformity of mixing.

[0017] Preferably, the second baffle and the first shielding portion are arranged at intervals in the horizontal direction.

[0018] In this solution, the second baffle and the first shielding portion are spaced apart in the horizontal direction, forming a space between the two through which air can rise directly from the bottom surface, so that part of the mixed gas can rise directly from the bottom surface, and part of the mixed gas flows to the second baffle and is blocked. The blocked airflow is then mixed with the rising airflow to form turbulence, which is beneficial to improving the uniformity of mixing.

[0019] Preferably, the combustion component mixing chamber includes a first mixing chamber and a second mixing chamber which are arranged in sequence from bottom to top along the height direction and separated by a flow equalizing plate, and the flow equalizing plate is provided with a plurality of through holes; the air inlet is arranged on the first side surface of the first mixing chamber.

[0020] In this solution, the combustion component mixing chamber is divided into a first mixing chamber and a second mixing chamber in the upper and lower parts by a flow equalizing plate, so that after the gas and air are mixed in the first mixing chamber to form turbulent flows with different flow directions, they are cut and guided by a number of through holes on the flow equalizing plate to form a mixed gas with a unified vertical flow. After the mixed gas burns, the flames are neatly directed upward, forming effective combustion and improving the combustion effect.

[0021] Preferably, the first mixing chamber and the second mixing chamber are divided into a plurality of compartments in the horizontal direction, and the first side surface is provided with unequal numbers of the air inlets in the plurality of compartments of the first mixing chamber.

[0022] In this solution, through the above-mentioned multiple compartments, the user can select one or more compartments to mix gas and then burn according to the needs of combustion calorific value and combustion effect. The selection is diverse and the adaptability of the burner is improved.

[0023] Preferably, the burner comprises a plurality of the combustion plates, and the plurality of the combustion plates respectively cover the plurality of the partition chambers of the second mixing chamber.

[0024] In this solution, by correspondingly arranging a plurality of combustion plates on a plurality of compartments, on the one hand, it meets the needs of mixing and burning of compartments of different combinations, and on the other hand, the use of a plurality of combustion plates makes it easy to manufacture.

[0025] Preferably, the central area of ​​the combustion plate protrudes upward or is recessed downward.

[0026] In this solution, the central area of ​​the combustion plate adopts a structure that protrudes upward or is recessed downward, so that the surface can be prevented from fluctuating during molding or combustion, or the surface of the heated combustion plate can be prevented from being deformed to different heights and affecting the stability of combustion.

[0027] A water heater comprises the burner as described above.

[0028] In this solution, the water heater uses the burner to allow each air inlet to pass through a certain mixed ratio of gas, thereby avoiding the mutual influence of airflows between multiple air inlets. Through the first baffle, a tortuous flow pattern is formed, which prolongs the mixing time and makes the mixing more complete; the mixed gas is blocked at the air inlet to form turbulence, which improves the uniformity of mixing, increases the calorific value of combustion, and thus improves the combustion efficiency.

[0029] The positive and progressive effect of the utility model is that the burner and the water heater including the burner allow each air inlet to pass a gas of a certain mixing ratio, thereby avoiding the mutual influence of airflows between multiple air inlets. Through the first baffle, a tortuous flow pattern is formed, which prolongs the mixing time and makes the mixing more complete; the mixed gas is blocked at the air inlet to form turbulence, thereby improving the uniformity of mixing, increasing the calorific value of combustion, and thus improving the combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the burner of Example 1 of the utility model.

[0031] Figure 2 This is a schematic diagram of the exploded structure of the burner of Example 1 of the utility model.

[0032] Figure 3 This is a top view of the burner of Example 1 of the utility model.

[0033] Figure 4 for Figure 3 Cross-sectional view along the AA direction.

[0034] Figure 5 for Figure 3 Cross-sectional view along direction BB.

[0035] Figure 6 for Figure 3 Cross-sectional view along CC direction.

[0036] Description of reference numerals:

[0037] Burner 1

[0038] Shell 2

[0039] Upper shell 21

[0040] Lower shell 22

[0041] First side 23

[0042] Second side 24

[0043] Combustion component mixing chamber 4

[0044] First mixing chamber 41

[0045] First compartment 411

[0046] Second compartment 412

[0047] The third compartment 413

[0048] Second mixing chamber 42

[0049] Fourth compartment 421

[0050] Fifth compartment 422

[0051] Sixth compartment 423

[0052] Current balancing plate 5

[0053] Air Inlet 6

[0054] First baffle 7

[0055] The first shielding portion 71

[0056] Second baffle 8

[0057] Burning board 3

[0058] First combustion plate 31

[0059] Second combustion plate 32

[0060] The third combustion plate 33

[0061] Inlet direction D DETAILED DESCRIPTION

[0062] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0063] Example 1

[0064] This embodiment provides a burner 1, which is installed in a water heater and is used to mix and burn gas and air in a certain mixing ratio. The heat generated by the combustion heats cold water, so that the water heater can provide hot water.

[0065] like Figure 1-6 As shown, the burner 1 includes a shell 2 and a combustion plate 3 arranged on the top of the shell 2. A combustion component mixing chamber 4 for mixing gas and air is arranged in the shell 2. The combustion plate 3 is arranged on the top of the shell 2. The combustion plate 3 is provided with a plurality of through holes. A plurality of air inlets 6 connected to the combustion component mixing chamber 4 are provided on at least one side of the shell 2. The air inlets 6 correspond to external nozzles (not shown in the figure). The shell 2 is provided with a first baffle 7 on a first side 23 at the air inlet 6. The first baffle 7 includes a first shielding portion 71 spaced apart from the first side 23. The projection of the first shielding portion 71 on the first side 23 along the air intake direction D at least partially shields the air inlet 6, and the first shielding portion 71 is spaced apart from the bottom surface of the shell 2.

[0066] Specifically, in this embodiment, the shell 2 is a rectangular box bent from sheet metal, and a combustion plate 3 is installed on the top of the shell 2. The combustion plate 3 is a metal plate with a plurality of through holes (not shown in the figure) on its surface. These through holes allow the flames to pass through the through holes after the mixed gas burns, so these through holes are also called fire holes. A plurality of air inlets 6 are provided on one side of the shell 2 near the bottom of the shell 2, and these air inlets 6 are connected to the combustion component mixing chamber 4 in the shell 2. Among the various sides of the shell 2, the side with the air inlet 6 is the first side 23.

[0067] By configuring the same number of nozzles as the air inlet 6, each air inlet 6 corresponds to an external nozzle one-to-one. When in use, adjust the distance between the nozzle and the air inlet 6, the nozzle of the nozzle is facing the air inlet 6, and the nozzle is controlled to spray gas to the air inlet 6 at a certain gas flow rate and a suitable spray speed. At the same time, the fan near the nozzle (not shown in the figure) blows air from both sides of the nozzle at a certain flow rate, and adjusts the blowing speed of the fan and the spray flow rate and speed of the nozzle so that the gas and air are sprayed into the combustion component mixing chamber 4 at the most favorable mixing ratio for combustion. It should be noted here that in the equipment mechanism of the water heater, the application of the nozzle in the burner 1 is a prior art and will not be described in detail here. The mixing ratio of air and gas used in this embodiment is 1.4. In other embodiments, this mixing ratio can be adjusted to the most appropriate ratio according to actual conditions.

[0068] The first baffle 7 is a bent sheet metal part, which is fixedly mounted on the first side surface 23. The first baffle 7 is bent to form a first shielding portion 71 spaced apart from the first side surface 23. The first shielding portion 71 is a flat plate bent and extended from the first baffle 7. The first shielding portion 71 is spaced apart from the bottom surface of the housing 2. In this embodiment, the size and position of the first shielding portion 71 are adjusted so that the projection of the first shielding portion 71 on the first side surface 23 along the air intake direction D partially shields the air intake port 6, that is, a part of the bottom of the air intake port 6 is not shielded by the first shielding portion 71. After the mixed gas enters, most of the airflow is blocked by the first shielding portion 71, changes its flow direction, turns back and flows to the bottom space of the housing 2; while a small part of the airflow directly passes through the unshielded part of the air intake port 6 horizontally along the air intake direction D. The airflow blocked by different positions of the first shielding portion 71 forms different flow directions, and the airflows in different flow directions and the airflows passing horizontally merge and mix in the space near the first shielding portion 71 to form turbulence, and then the turbulence flows from the bottom of the shell 2 to the inner space of the combustion component mixing chamber 4. In other embodiments, under the condition that the first shielding portion 71 is set at a distance from the bottom surface of the shell 2, the first shielding portion 71 can also completely block the air inlet 6 along the air intake direction D without leaving a gap at the bottom of the air inlet 6 for horizontal direct flow. However, this method is not as good as the present embodiment, in which a certain gap is left at the bottom of the air inlet 6 without being blocked, which is conducive to better mixing of the airflow directly flowing in horizontally with other airflows.

[0069] In this embodiment, multiple air inlets 6 are only provided on one side of the shell 2, so as to centralize the air intake and the arrangement of the burner 1 and external components; however, in other embodiments, according to the requirements of the combustion effect, air inlets 6 may be provided on two opposite sides or multiple sides of the shell 2, and correspondingly, nozzles are also arranged on both sides or arranged in a surrounding manner on multiple sides. In this case, the first side 23 includes multiple sides, rather than just one side.

[0070] The burner 1 corresponds to the nozzle through the above-mentioned air inlet 6, and the gas ejected from the nozzle drives the surrounding air at a certain flow rate and speed to enter the combustion component mixing chamber 4 for mixing at a certain mixing ratio. By configuring the number of nozzles to correspond to each air inlet 6 one by one, each air inlet 6 is fed with gas of a certain mixing ratio, avoiding the mutual influence of airflows between multiple air inlets 6. In addition, the combustion component mixing chamber 4 adopts a multi-nozzle air intake method, and the air carried by the gas ejected from each air inlet 6 can be more uniform, so that the degree of mixing of gas and air in the combustion component mixing chamber 4 is more sufficient. Through the above-mentioned first baffle 7, on the one hand, the mixed gas forms a tortuous flow from the air inlet 6 to the combustion component mixing chamber 4, which prolongs the mixing time and makes the mixing more sufficient; on the other hand, the mixed gas is blocked at the air inlet 6 to form turbulence, and then flows into the mixing chamber together for further mixing, which improves the uniformity of mixing, improves the calorific value of combustion, and thus improves the combustion efficiency. When the shell 2 is provided with air inlets 6 and the first baffle 7 of the above structure on multiple sides, it is beneficial to improve the overall air intake efficiency of the burner 1; at the same time, the uniformity of mixing is further improved, thereby further improving the combustion efficiency.

[0071] In this embodiment, the first shielding portion 71 is parallel to the first side surface 23, so that the first baffle 7 forms a relatively regular structure and is easy to manufacture; and the horizontally flowing mixed gas is blocked by the vertically arranged first shielding portion 71, which produces a large effective blocking area and improves the effect of blocking the airflow.

[0072] like Figure 4 and Figure 6 As shown, the shell 2 also includes a second side surface 24 relative to the first side surface 23, and a second baffle 8 is provided on the inner wall of the second side surface 24. The second baffle 8 is spaced apart from the first side surface 23, and the second baffle 8 is perpendicular or inclined to the second side surface 24. The height of the second baffle 8 is not lower than the height of the first baffle 7.

[0073] Specifically, the second baffle 8 is an L-shaped sheet metal part, and half of the second baffle 8 is installed and fixed on the second side 24, and the other half of the second baffle 8 is perpendicular to the second side 24 and spaced from the first side 23, and its position is higher than that of the first baffle 7, so that the turbulent flow blocked and mixed by the first baffle 7, a part of it flows upward from the bottom of the shell 2, and flows upward from the space between the first baffle 7 and the second baffle 8, and a part of it flows to the bottom near the second side 24, and then flows upward, and is blocked by the second baffle 8, changing the flow direction, further mixing, and achieving a full mixing effect. The fully mixed turbulent flow flows upward, and finally reaches the combustion plate 3, ignites, generates a combustion flame, and the flame passes through the through hole of the combustion plate 3. The formed flame has the advantages of high combustion intensity and low exhaust gas emission.

[0074] In such a structure, the two baffles provided above further extend the curved flow path of the mixed gas in the combustion component mixing chamber 4, and successively experience two obstructions to form turbulence, further improving the uniformity of the mixing. Among them, the second baffle 8 is perpendicular or inclined to the second side surface 24, which can effectively block the mixed gas flowing upward from the bottom surface of the shell 2; the height of the second baffle 8 is not less than the height of the first baffle 7, which can block more mixed gas and form a more uniform turbulence.

[0075] In other embodiments, according to the needs of the mixing effect, a plurality of second baffles 8 may be provided on the inner wall of the second side surface 24, or the second baffle 8 may be divided into a plurality of sections. The heights of the plurality of second baffles 8 are not equal, forming a structural form of varying heights, thereby improving the airflow at different positions in the combustion component mixing chamber 4 and being blocked in different directions and to different degrees, which is beneficial to improving the uniformity of mixing.

[0076] Among them, the second baffle 8 is not only spaced apart from the first side surface 23, but also spaced apart from the first shielding portion 71 in the horizontal direction, so that a space is formed between the two (the second baffle 8 and the first shielding portion 71) where the airflow can rise directly from the bottom surface, so that a part of the mixed gas can rise directly from the bottom surface, and a part of the mixed gas flows to the second baffle 8 and is blocked, and the blocked airflow is mixed with the rising airflow to form turbulent flow, which is conducive to improving the uniformity of mixing. In other embodiments, the second baffle 8 can also be extended along the horizontal direction of the flat plate toward the first side surface 23, exceeding the first shielding portion 71, but still spaced apart from the first side surface 23. With such a structure, although the curved flow path of the airflow is extended, it is not conducive to the mixed gas to maintain a certain flow rate, which is not as good as the structural form of this embodiment. While fully mixing, it also maintains a certain flow rate to meet the needs of timely combustion.

[0077] like Figure 2 As shown, the combustion component mixing chamber 4 includes a first mixing chamber 41 and a second mixing chamber 42 which are arranged in sequence from bottom to top along the height direction and separated by a flow equalizing plate 5, and a plurality of through holes are provided on the flow equalizing plate 5. Correspondingly, the shell 2 is also divided into two parts, the lower shell 2 corresponding to the first mixing chamber 41 and the upper shell 2 corresponding to the second mixing chamber 42. The upper shell 2 is larger than the lower shell 2, and the edges of the upper and lower shells 2 are connected by fasteners such as bolts. The combustion plate 3 is larger than the upper shell 2, and its edges are also connected and fixed to the upper shell 2 by bolts. The air inlet 6 is provided on the first side 23 of the lower shell 2 located in the first mixing chamber 41. In this embodiment, the flow equalizing plate 5 and the upper shell 2 are made into an integral structure, and the through holes on the flow equalizing plate 5 are the through holes in the central area of ​​the recessed structure of the upper shell 2. In other embodiments, according to the needs of structural coordination, the flow equalizing plate 5 and the upper shell 2 can also be manufactured separately, and the upper and lower shells 2 can also be manufactured into an integral structure.

[0078] The combustion component mixing chamber 4 is divided into a first mixing chamber 41 and a second mixing chamber 42 in the upper and lower parts by the flow equalizing plate 5, so that after the fuel gas and air are mixed in the first mixing chamber 41 to form a fully mixed gas with different flow directions, they are cut and guided by a number of through holes on the flow equalizing plate 5 to form a mixed gas with a uniform vertical flow in the second mixing chamber 42, and then ignited and burned, with the flames pointing neatly upward to form effective combustion, thereby improving the combustion effect. Therefore, the second mixing chamber 42 is also a combustion chamber.

[0079] The first mixing chamber 41 and the second mixing chamber 42 are divided into a plurality of compartments in the horizontal direction, and the first side surface 23 is provided with unequal numbers of air inlets 6 in the plurality of compartments of the first mixing chamber 41 .

[0080] Specifically, Figure 2 As shown, the first mixing chamber 41 is divided into three compartments, namely the first compartment 411, the second compartment 412 and the third compartment 413. Correspondingly, the second mixing chamber 42 located at the upper layer is also divided into three compartments, namely the fourth compartment 421, the fifth compartment 422 and the sixth compartment 423. The first side 23 is provided with 7 air inlets 6 at the first compartment 411, 2 air inlets 6 at the second compartment 412, and 4 air inlets 6 at the third compartment 413, so that the user can select one or more compartments to mix gas and then burn according to the needs of combustion calorific value and combustion effect, and the selection is diverse, which improves the adaptability of the burner 1. For example, when the water heater needs a large amount of hot water and a high temperature, the three compartments can work at the same time, and when the water heater needs a low amount of hot water and a low temperature, only the first compartment 411 can be selected to work.

[0081] Among them, Figure 2 As shown, the burner 1 includes three combustion plates 3, namely the first combustion plate 3, the second combustion plate 3 and the third combustion plate 3, which respectively cover the fourth compartment 421, the fifth compartment 422 and the sixth compartment 423 of the second mixing chamber 42. On the one hand, it can meet the needs of mixing and burning of compartments of different combinations. On the other hand, it is easy to manufacture by using multiple combustion plates 3.

[0082] Among them, Figure 4-6 As shown, the central area of ​​the combustion plate 3 is protruding upward or concave downward, so that during the molding or combustion process, the surface is prevented from fluctuating up and down, or the surface of the heated combustion plate 3 is not easily deformed to different heights to affect the stability of combustion. The combustion plate 3 of this embodiment adopts a structural form that protrudes upward.

[0083] In this embodiment, the multiple nozzles corresponding to the multiple air inlets 6 are all of the same type, which can effectively control each nozzle to have the same air intake volume. The burner 1 adopts a layout of multiple cavities and multiple combustion plates to perform combustion combinations of different cavities, providing a wide range of combustion power from low to high, which is convenient for users to make corresponding choices according to power needs, without wasting energy, and having a better experience effect.

[0084] Example 2

[0085] This embodiment provides a water heater, which includes a burner 1 as in Embodiment 1, so that each air inlet 6 is fed with a gas of a certain mixing ratio, thereby avoiding mutual influence of airflows between multiple air inlets 6. A tortuous flow pattern is formed by the first baffle 7, which prolongs the mixing time and makes the mixing more complete; the mixed gas is blocked at the air inlet 6 to form turbulence, thereby improving the uniformity of mixing, the calorific value of combustion, and thus the combustion efficiency.

[0086] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A burner, comprising a shell and a combustion plate arranged on the top of the shell, wherein a combustion component mixing chamber for mixing gas and air is arranged in the shell, and a plurality of through holes are arranged on the combustion plate, characterized in that: A plurality of air inlets connected to the combustion component mixing chamber are provided on at least one side surface of the shell, and the air inlets correspond to the external nozzles. A first baffle is provided on the first side surface of the shell at the air inlet, and the first baffle includes a first shielding portion spaced apart from the first side surface, a projection of the first shielding portion on the first side surface along the air intake direction at least partially shields the air inlet, and the first shielding portion is spaced apart from the bottom surface of the shell.

2. The burner according to claim 1, characterized in that The first shielding portion is parallel to the first side surface.

3. The burner according to claim 1, characterized in that The housing further comprises a second side surface opposite to the first side surface, A second baffle is disposed on the inner wall of the second side surface. The second baffle is spaced apart from the first side surface. The second baffle is perpendicular or inclined to the second side surface. The height of the second baffle is not less than that of the first baffle.

4. The burner according to claim 3, characterized in that A plurality of second baffles are disposed on the inner wall of the second side surface, and the heights of the plurality of second baffles are unequal.

5. The burner according to claim 3, characterized in that The second baffle plate and the first shielding portion are arranged at an interval along the horizontal direction.

6. The burner according to any one of claims 1 to 5, characterized in that: The combustion component mixing chamber includes a first mixing chamber and a second mixing chamber which are arranged in sequence from bottom to top along the height direction and separated by a flow equalizing plate, and the flow equalizing plate is provided with a plurality of through holes; the air inlet is arranged on the first side surface of the first mixing chamber.

7. The burner according to claim 6, characterized in that The first mixing chamber and the second mixing chamber are divided into a plurality of compartments in a horizontal direction, and the first side surface is provided with unequal numbers of the air inlets in the plurality of compartments of the first mixing chamber.

8. The burner according to claim 7, characterized in that The burner includes a plurality of combustion plates, and the plurality of combustion plates are respectively covered on the plurality of partition chambers of the second mixing chamber.

9. The burner according to claim 1, characterized in that The central area of ​​the combustion plate is protruding upward or recessed downward.

10. A water heater, characterized in that: The water heater comprises a burner as claimed in any one of claims 1 to 9.

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