Combustion plate, combustion device, combustion system and gas equipment

Abstract

The invention relates to a combustion plate, a combustion device, a combustion system and gas equipment, the combustion plate is provided with at least one first combustion channel, the combustion plate further comprises at least one combustion part, one end of each combustion part correspondingly extends into one first combustion channel, and each combustion part is provided with a second combustion channel; a protruding part is arranged on the side wall of the end, stretching into the first combustion channel, of at least part of the combustion part in a protruding mode, and the sectional area of the protruding part is larger than that of the rest part, without the protruding part, of the combustion part. According to the burner, the protruding part arranged on the side wall of the burning part in the protruding mode can disturb air flow flowing along the first burning channel, so that the flame stabilizing effect of dragging is achieved on flames generated by burning, the backfire phenomenon and the blow-off phenomenon are effectively prevented, the impurity preventing effect can be achieved to a certain degree, and the service life of the burner is prolonged. And the advantages of premixed combustion and diffusive combustion are fully exerted.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange equipment, and particularly to a combustion plate, a combustion device, a combustion system and a gas appliance. Background Art

[0002] With the development of science and technology and the gradual improvement of people's living standards, people's requirements for the quality of life are getting higher and higher. As a small thermal equipment that uses the heat released by gas combustion to heat domestic water to the required temperature through a heat exchanger, a gas water heater has many advantages such as high efficiency, fast water output, stable water temperature adjustment, and continuous use, and has become the first choice for people's hot water products. Among them, small-sized and low-emission gas water heaters have gradually become a new market demand. Therefore, as a very widely used gas appliance, the gas water heater plays a crucial role in the efficient utilization of gas resources.

[0003] A gas water heater mainly consists of a combustion system, a heat exchange system, a smoke exhaust system and a temperature control system. The combustion system and the heat exchange system usually occupy two-thirds of the height of the entire gas water heater. Most traditional combustion systems adopt three combustion methods: diffusion combustion, atmospheric combustion and premixed combustion. Among them, diffusion combustion is that gas burns directly in the atmosphere, while the atmospheric combustion commonly used in existing gas water heaters is partial premixed combustion. Gas and air are pre-mixed in a certain proportion in advance and then burn in the atmosphere. The combustion is relatively stable, but the combustion flame is long, the combustion efficiency is low, the combustion is incomplete, and the contents of NOx and CO in the flue gas are relatively high. Premixed combustion is that gas and air are completely mixed in a certain proportion and then burn in the air. Its combustion intensity is high, the flame propagation ability is strong, and the flame is short. However, when high-temperature air and gas are mixed and enter combustion, problems such as unstable combustion will occur, and both flashback phenomenon and blowout phenomenon are likely to occur, thus affecting the normal use of the gas water heater. Summary of the Invention

[0004] In view of the problem of unstable combustion of gas water heaters, the present application provides a combustion plate, a combustion device, a combustion system and a gas appliance, which can achieve the technical effect of improving combustion stability.

[0005] A combustion plate, the combustion plate has at least one first combustion channel, and the combustion plate further includes at least one combustion part. One end of each combustion part correspondingly extends into one of the first combustion channels, and each combustion part is provided with a second combustion channel;

[0006] Wherein, at least part of the side wall of the end of the combustion part extending into the first combustion channel is convexly provided with a protruding part, and the cross-sectional area of the protruding part is larger than the cross-sectional area of the remaining part of the combustion part without the protruding part.

[0007] In one embodiment, the protruding portion circumferentially surrounds the second combustion channel.

[0008] In one embodiment, the protruding portion is located at one end of the combustion portion near the gas outlet end of the first combustion channel.

[0009] In one embodiment, the protruding portion is located in the middle section in the axial direction of the combustion portion.

[0010] In one embodiment, in the axial direction of the first combustion channel, the cross-sectional area of the protruding portion is equal everywhere.

[0011] In one embodiment, in the direction from the gas inlet end to the gas outlet end of the first combustion channel, the cross-sectional area of the protruding portion gradually increases.

[0012] In one embodiment, the outer diameter of the protruding portion is 3 mm - 25 mm.

[0013] In one embodiment, the thickness of the protruding portion in the axial direction of the first combustion channel is 0.5 mm - 3 mm.

[0014] In one embodiment, the number of the first combustion channels is equal to the number of the combustion portions.

[0015] In one embodiment, there are at least two first combustion channels, and all the first combustion channels are arranged at intervals in the same direction.

[0016] In one embodiment, there are at least two first combustion channels, and all the first combustion channels are arranged at intervals along the length direction and / or width direction of the combustion plate.

[0017] In one embodiment, the combustion plate includes a first combustion module and a second combustion module arranged in a nested manner. The first combustion channel is formed in the first combustion module, and the combustion portion is formed in the second combustion module.

[0018] In one embodiment, the combustion plate further includes a distribution portion, and the distribution portion communicates with the second combustion channel.

[0019] In one embodiment, the distribution portion includes a first distribution portion and a second distribution portion. One end of the second distribution portion communicates with the second combustion channel, and the other end of the second distribution portion communicates with the first distribution portion.

[0020] In one embodiment, a gap formed between the first combustion channel and the second distribution portion is a first gas transmission channel, and the first gas transmission channel communicates with the first combustion channel.

[0021] A combustion device, comprising the above-mentioned combustion plate.

[0022] A combustion system, comprising the above-mentioned combustion device.

[0023] In one embodiment, the combustion system includes a gas supply device and a mixing device. The gas supply device includes a first ventilation component, a second ventilation component, and a third ventilation component. Both the first ventilation component and the third ventilation component are communicated with the intake end of the mixing device. The outlet end of the mixing device is communicated with the first combustion channel, and the second ventilation component is communicated with the second combustion channel;

[0024] Wherein, the third ventilation component is used for conveying one of fuel gas and combustion-supporting gas, both the first ventilation component and the second ventilation component are used for conveying the other of fuel gas and combustion-supporting gas, and at least one of the first ventilation component and the second ventilation component can be conducted.

[0025] In one embodiment, the combustion plate further includes a distribution part, and the second ventilation component is communicated with the second combustion channel through the distribution part.

[0026] A gas equipment, comprising the above-mentioned combustion system.

[0027] For the above-mentioned burner, the protruding part protruding from the side wall of the combustion part can disturb the air flow flowing along the first combustion channel, thereby playing a role of stabilizing the flame by "dragging" the flame generated by combustion, effectively preventing the occurrence of flashback phenomenon and blow-off phenomenon, and can play a role of preventing impurities to a certain extent, and giving full play to the advantages of premixed combustion and diffusion combustion. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of a combustion system according to an embodiment of the present application.

[0029] Figure 2 It is a partial structural schematic diagram of a burner according to an embodiment of the present application.

[0030] Figure 3 It is Figure 1 An exploded schematic diagram of a part of the structure of the shown burner.

[0031] Figure 4 It is a schematic diagram of the first combustion channel and the second combustion channel of a burner according to an embodiment of the present application.

[0032] Figure 5 It is a schematic diagram of a second combustion module according to an embodiment of the present application.

[0033] Figure 6 It is a schematic diagram of the air flow of the first combustion channel of a burner according to an embodiment of the present application.

[0034] Description of the attached drawing reference numerals:

[0035] 100, burner; 110, combustion plate; 120, first combustion module; 121, first combustion channel; 140, second combustion module; 141, combustion part; 1412, second combustion channel; 143, protruding part; 160, water cooling unit; 180, distribution part; 181, first distribution part; 183, second distribution part; 200, gas supply device; 210, first ventilation component; 230, second ventilation component; 250, third ventilation component; 300, mixing device. Detailed implementation manners

[0036] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are 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. Therefore, it should not be construed as a limitation of the present application.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; 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 components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In this application, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0041] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0042] Refer to Figures 1 to 3 , an embodiment of this application provides a gas device, which can be a water heater or a wall-mounted boiler, and includes a gas system, a housing, a heat exchange system, a control system, a detection system, etc. The gas system includes a combustion device 100, a gas supply device 200 and a mixing device 300. The gas supply device 200 can be directly or indirectly connected to the combustion device 100 and is used to supply fuel gas and / or combustion-supporting gas to the combustion device 100. The mixing device 300 is connected to the combustion device 100 and is used to provide a place for gas mixing. The combustion device 100 includes a combustion plate 110, a water-cooling unit 160 and a distribution part 180. The water-cooling unit 160 is used to reduce the temperature of the combustion plate 110, absorb the heat in the combustion chamber housing, cool the gas and prevent combustion flashback. The distribution part 180 is used to distribute the gas to the combustion plate 110.

[0043] Taking a gas water heater as an example of a gas device, the structure of the combustion device 100 in the present application will be described below. This embodiment is only used as an example and will not limit the technical scope of the present application. It can be understood that in other embodiments, the combustion device 100 can also be applied to heating devices such as wall-mounted boilers, which is not limited herein.

[0044] Please continue to refer to Figures 1 to 3 , the combustion plate 110 includes a first combustion module 120 and a second combustion module 140. The first combustion module 120 and the second combustion module 140 are received in the combustion chamber housing and nested with each other. The first combustion module 120 and the second combustion module 140 divide the combustion chamber housing into a combustion space and an integrated air duct. The water cooling unit 160 is installed on one side of the first combustion module 120 for reducing the temperature of the first combustion module 120, absorbing the heat in the combustion chamber housing, cooling the gas, and preventing combustion flashback. The distribution part 180 is connected to the second combustion module 140 for distributing the gas to each area of the second combustion module 140.

[0045] The first combustion module 120 is generally in a flat plate structure. The first combustion module 120 is provided with at least one first combustion channel 121. Each first combustion channel 121 extends linearly along the thickness direction of the first combustion module 120. The opposite ends of the first combustion channel 121 in the axial direction form an air inlet end and an air outlet end respectively.

[0046] The second combustion module 140 includes at least one combustion part 141. Each combustion part 141 is in a columnar structure. One end of each combustion part 141 correspondingly extends into a first combustion channel 121. Each combustion part 141 is provided with a second combustion channel 1412. The opposite ends of the second combustion channel 1412 in the axial direction form an air inlet end and an air outlet end respectively. The first combustion channel 121 surrounds the second combustion channel 1412 in the circumferential direction. It can be understood that the specific structure of the second combustion module 140 is not limited thereto and can be set as needed. In some embodiments, there are at least two first combustion channels 121, and all the first combustion channels 121 are arranged at intervals in the same direction. Further, in some embodiments, all the first combustion channels 121 are arranged at intervals along the length direction and / or the width direction of the combustion plate 110. Among them, the length direction of the combustion plate 110 is Figure 1 the X direction in Figure 1 and the width direction of the combustion plate 110 is

[0047] Specifically, in one embodiment, all the first combustion channels 121 are arranged at intervals along the length direction of the combustion plate 110. In another embodiment, all the first combustion channels 121 are arranged at intervals along the width direction of the combustion plate 110. In another embodiment, all the first combustion channels 121 are arranged in an array, that is, multiple groups of first combustion channels 121 are arranged at intervals along the length direction of the combustion plate 110, and all the first combustion channels 121 in each group are arranged at intervals along the width direction of the combustion plate 110. Correspondingly, the arrangement mode of the combustion part 141 is adapted to that of the first combustion channel 121, so that the combustion part 141 extends into the first combustion channel 121.

[0048] The shape of the first combustion channel 121 is not limited. The cross-section of the first combustion channel 121 perpendicular to the axial direction can be one or more of regular or irregular shapes such as circular, elliptical, polygonal, etc. Correspondingly, the cross-section of the combustion part 141 perpendicular to the axial direction can also be one or more of regular or irregular shapes such as circular, elliptical, polygonal, etc. In the axial direction, the sizes of the cross-sections of the first combustion channel 121 can be the same or different, and the sizes of the cross-sections of the combustion part 141 can also be the same or different.

[0049] As a preferred embodiment, the first combustion module 120 is provided with a plurality of first combustion channels 121, and all the first combustion channels 121 are arranged in an array, that is, multiple groups of first combustion channels 121 are arranged at intervals along the length direction of the combustion plate 110, and all the first combustion channels 121 in each group are arranged at intervals along the width direction of the combustion plate 110. The central axes of all the first combustion channels 121 are parallel to each other, the cross-section of each first combustion channel 121 is circular, and the inner diameters of all the first combustion channels 121 are equal everywhere.

[0050] Correspondingly, the number of the combustion parts 141 is equal to that of the first combustion channels 121, and the arrangement mode of the combustion parts 141 is the same as the arrangement direction of the first combustion channels 121. Specifically, the combustion parts 141 are arranged in an array, that is, multiple groups of combustion parts 141 are arranged at intervals along the length direction of the combustion plate 110, and all the combustion parts 141 in each group are arranged at intervals along the width direction of the combustion plate 110. The central axes of all the combustion parts 141 are parallel to each other, each combustion part 141 is in a cylindrical structure with a diameter equal everywhere, and the diameter of the combustion part 141 is smaller than the inner diameter of the first combustion channel 121. One end of each combustion part 141 extends into a first combustion channel 121 along the axial direction correspondingly, and each first combustion channel 121 is coaxially arranged with a second combustion channel 1412.

[0051] In some other embodiments, the number of the first combustion channels 121 may also be greater than the number of the combustion parts 141. Therefore, only some of the first combustion channels 121 are provided with the combustion parts 141. The first combustion channels 121 provided with the combustion parts 141 and the first combustion channels 121 not provided with the combustion parts 141 may be alternately arranged at intervals in one direction. The first combustion channels 121 provided with the combustion parts 141 and the first combustion channels 121 not provided with the combustion parts 141 may also be located in different regions of the combustion plate 110 respectively.

[0052] In this way, by introducing different types of gases, including air, fuel gas, and a mixture of air and fuel gas, into the first combustion channels 121 and the second combustion channels 1412 respectively, the burner 100 can have different combustion modes to adapt to different usage scenarios.

[0053] Further, in some embodiments, the distribution part 180 includes a first distribution part 181 and at least one second distribution part 183. Specifically, there are a plurality of second distribution parts 183, and the plurality of second distribution parts 183 are arranged in sequence along the width direction of the combustion plate 110. Each second distribution part 183 extends longitudinally along the length direction of the combustion plate 110. The first distribution part 181 is arranged on one side of all the second distribution parts 183 in the height direction of the combustion plate 110 and is located at one end of all the second distribution parts 183 in the length direction of the combustion plate 110. The first distribution part 181 is communicated with an external gas source. A plurality of combustion parts 141 are provided on each second distribution part 183. One end of the second distribution part 183 is communicated with the second combustion channel 1412, and the other end of the second distribution part 183 is communicated with the first distribution part 181. The gap formed between the first combustion channel 121 and the second distribution part 183 is a first gas transmission channel, and the first gas transmission channel is communicated with the first combustion channel 121.

[0054] Among them, as described in the background art, in the premixed combustion mode, due to the high combustion temperature and fast combustion speed, the stability of the flame is poor, and flashback or blowout is likely to occur. It should be noted that the blowout phenomenon refers to the phenomenon that the gas volume in the normal direction of the combustion flame surface of the fuel gas (or the mixture of fuel gas and air) is greater than the flame propagation speed, and the flame is difficult to maintain stability or even goes out. The flashback phenomenon refers to the phenomenon that the component of the fuel gas (or the mixture of fuel gas and air) flow velocity in the normal direction of the combustion flame surface is less than the flame propagation speed, and the flame shrinks into the burner 100 to form incomplete combustion.

[0055] To solve the above problems, in combination with Figure 4 and Figure 5As shown, in the present application, at least one end of the combustion part 141 extending into the first combustion channel 121 has a convex part 143 protruding from the side wall, and the cross-sectional area of the convex part 143 is larger than the cross-sectional area of the remaining part of the combustion part 141 without the convex part 143.

[0056] In this way, as Figure 6 shown, the convex part 143 protruding from the side wall of the combustion part 141 can disturb the airflow flowing along the first combustion channel 121, so as to play a role of stabilizing the flame by "dragging" the flame generated by combustion, effectively preventing the occurrence of flashback and blow-off phenomena, and can play a role in preventing impurities to a certain extent, and giving full play to the advantages of premixed combustion and diffusion combustion.

[0057] In some embodiments, the convex part 143 forms a closed annular structure around the second combustion channel 1412 along the circumferential direction, so as to achieve a good disturbance effect in all circumferential directions. It can be understood that the shape of the convex part 143 is not limited. In some embodiments, the cross-section of the convex part 143 perpendicular to the axial direction of the second combustion channel 1412 is circular. In some other embodiments, the cross-section of the convex part 143 perpendicular to the axial direction of the second combustion channel 1412 can also be triangular, square, polygonal or other regular or irregular shapes, and can also achieve the effect of disturbing the flow direction of the airflow.

[0058] In some other embodiments, the convex part 143 includes a plurality of sub-convex parts 143, and all the sub-convex parts 143 are arranged at intervals along the circumferential direction of the second combustion channel 1412. It can be understood that the number of the sub-convex parts 143 can be set as required, and the shapes and sizes of each sub-convex part 143 can be the same or different, and can be set as required to meet different combustion requirements.

[0059] Please continue to refer to Figure 4 、 Figure 5 and Figure 6 , in some embodiments, the convex part 143 is located at one end of the combustion part 141 close to the air outlet end of the first combustion channel 121, and the end face of the convex part 143 far from the air inlet end of the first combustion channel 121 is flush with one end face of the combustion part 141. Therefore, the airflow flowing through the first combustion channel 121 generates a backflow at the side edge of the convex part 143 far from the air outlet end of the first combustion channel 121, so as to play a good role of stabilizing the flame by "dragging" the flame. In some other embodiments, the convex part 143 is located in the middle section of the combustion part 141 in the axial direction (that is, between the air inlet end and the air outlet end of the first combustion channel 121), so as to enhance the airflow disturbance in advance, generate a certain rotational airflow, and thus strengthen the subsequent combustion effect.

[0060] It can be understood that the specific position of the protruding portion 143 in the axial direction of the combustion portion 141 is not limited, and the specific position of the protruding portion 143 in the axial direction of the combustion portion 141 can be adjusted as needed, so as to produce different combustion effects.

[0061] In some embodiments, in the axial direction of the first combustion channel 121, the cross-sectional area of the protruding portion 143 is equal everywhere. In another embodiment, in the direction from the air inlet end to the air outlet end of the first combustion channel 121, the cross-sectional area of the protruding portion 143 gradually increases, and the side wall of the protruding portion 143 is conical. It can be understood that the shape of the protruding portion 143 is not limited to this, and it can be set as needed to form different combustion effects.

[0062] Please refer to Figure 5 , specifically in one embodiment, the cross-section of the protruding portion 143 is circular, the outer diameter L2 of the protruding portion 143 is 3 mm - 25 mm, preferably 4 mm, and the thickness L4 of the protruding portion 143 in the axial direction of the first combustion channel 121 is 0.5 mm - 3 mm, preferably 0.5 mm. It can be understood that the size of the protruding portion 143 is not limited and can be designed according to the actual size of the second combustion module 140. Specifically, if the outer diameter of the protruding portion 143 is too small, it cannot effectively disturb the air flow. If the outer diameter of the protruding portion 143 is too large, it will affect the normal flow of the air flow.

[0063] Furthermore, please refer to Figure 5 , in some embodiments, the inner diameter L1 of the second combustion channel 1412 is 1 mm - 5 mm, preferably 1 mm, the axial length L5 of the second combustion channel 1412 is preferably 19 mm, and the outer diameter L3 of the part of the combustion portion 141 without a boss is 3 m - 15 mm, preferably 3 mm. It can be understood that the sizes of the combustion portion 141 and the second combustion channel 1412 are not limited and can be designed according to different factors such as the diffusion combustion load to meet different requirements.

[0064] In some embodiments, the gas supply device 200 of the combustion system includes a first ventilation component 210, a second ventilation component 230, and a third ventilation component 250. Both the first ventilation component 210 and the third ventilation component 250 are communicated with the air inlet end of the mixing device 300. The air outlet end of the mixing device 300 is communicated with the first combustion channel 121 through a first gas transmission channel. The second ventilation component 230 is communicated with the second combustion channel 1412 through a distribution portion 180. Among them, the third ventilation component 250 is used to transport one of the fuel gas and the combustion-supporting gas, both the first ventilation component 210 and the second ventilation component 230 are used to transport the other of the fuel gas and the combustion-supporting gas, and at least one of the first ventilation component 210 and the second ventilation component 230 can be conducted.

[0065] Thus, the burner 100 has a premixed combustion mode, a diffusion combustion mode, and a dual combustion mode that integrates premixed combustion and diffusion combustion.

[0066] When the burner 100 is in the premixed combustion mode: the first ventilation component 210 is not conducting, the second ventilation component 230 is conducting, the fuel gas enters the mixing device 300 from the second ventilation component 230, the combustion-supporting gas enters the mixing device 300 through the third ventilation component 250, and after the fuel gas and the combustion-supporting gas are mixed in the mixing device 300, the mixed gas flows out from the first combustion channel 121 and is ignited to achieve premixed combustion.

[0067] When the burner 100 is in the diffusion combustion mode, the second ventilation component 230 is not conducting, the first ventilation component 210 is conducting, after the fuel gas enters the distribution part 180 from the first ventilation component 210, it flows into the second combustion channel 1412 through the distribution part 180, after the combustion-supporting gas enters the mixing device 300 through the third ventilation component 250, the combustion-supporting gas flows out from the first combustion channel 121, and the fuel gas and the combustion-supporting gas are ignited after entering the combustion chamber to achieve diffusion combustion.

[0068] When the burner 100 is in the dual combustion mode, the first ventilation component 210 is conducting, the second ventilation component 230 is conducting, the fuel gas enters the mixing device 300 from the second ventilation component 230, the combustion-supporting gas enters the mixing device 300 through the third ventilation component 250, after the fuel gas and the combustion-supporting gas are mixed in the mixing device 300, they flow out from the first combustion channel 121 and are ignited to achieve premixed combustion. After the fuel gas enters the distribution part 180 from the first ventilation component 210, it flows into the second combustion channel 1412 through the distribution part 180, and the combustion-supporting gas in the mixed gas in the first combustion channel 121 can be ignited with the fuel gas in the second combustion channel 1412 in the combustion chamber to achieve diffusion combustion simultaneously.

[0069] For the above-mentioned combustion plate 110, combustion device 100, combustion system and gas equipment, by providing the protruding part 143 on the combustion part 141, a recirculation airflow can be generated at the air outlet end of the first combustion channel 121 to provide a stable ignition point, and then the flames generated by the burner 100 in the premixed combustion mode and the diffusion combustion mode can be flame-stabilized, effectively preventing the occurrence of flashback and blowout phenomena, giving full play to the advantages of premixed combustion and diffusion combustion, and then the height of the combustion flame can be shortened, stable and efficient combustion can be achieved, the overall volume of the gas water heater can be reduced, the emission of NOx pollutants can be decreased, and the thermal efficiency can be increased.

[0070] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0071] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A combustion plate, characterized in that, The combustion plate has at least one first combustion channel (121), and the combustion plate further includes at least one combustion part (141). One end of each combustion part (141) correspondingly extends into one of the first combustion channels (121), and each combustion part (141) is provided with a second combustion channel (1412). Wherein, at least part of the side wall of the end of the combustion part (141) extending into the first combustion channel (121) is convexly provided with a protruding part (143), and the cross-sectional area of the protruding part (143) is larger than the cross-sectional area of the remaining part of the combustion part (141) without the protruding part (143).

2. The combustion plate according to claim 1, wherein The protruding part (143) surrounds the second combustion channel (1412) in the circumferential direction.

3. The combustion plate according to claim 1, characterized in that, The protruding part (143) is located at one end of the combustion part (141) close to the air outlet end of the first combustion channel (121).

4. The combustion plate according to claim 1, wherein, The protruding part (143) is located in the middle section in the axial direction of the combustion part (141).

5. The burner plate according to claim 1, wherein In the axial direction of the first combustion channel (121), the cross-sectional area of the protruding part (143) is equal everywhere.

6. The combustion plate according to claim 1, characterized in that, In the direction from the air inlet end to the air outlet end of the first combustion channel (121), the cross-sectional area of the protruding part (143) gradually increases.

7. The combustion plate according to claim 1, characterized in that, The outer diameter of the protruding part (143) is 3 mm - 25 mm.

8. The combustion plate according to claim 1, wherein The thickness of the protruding part (143) in the axial direction of the first combustion channel (121) is 0.5 mm - 3 mm.

9. The burner plate according to claim 1, characterized in that The number of the first combustion channels (121) is equal to the number of the combustion parts (141).

10. The combustion plate according to claim 1, characterized in that, The first combustion channels (121) are at least two, and all the first combustion channels (121) are arranged at intervals in the same direction.

11. The combustion plate according to claim 1, characterized in that, The first combustion channels (121) are at least two, and all the first combustion channels (121) are arranged at intervals along the length direction and / or the width direction of the combustion plate.

12. The burner plate according to claim 1, characterized in that, The combustion plate includes a first combustion module (120) and a second combustion module (140) which are nested. The first combustion channels (121) are opened in the first combustion module (120), and the combustion parts (141) are formed in the second combustion module (140).

13. The burner plate according to claim 12, characterized in that, The combustion plate further includes a distribution part (180), and the distribution part (180) communicates with the second combustion channels (1412).

14. The burner plate according to claim 13, wherein, The distribution part (180) includes a first distribution part (181) and a second distribution part (183). One end of the second distribution part (183) communicates with the second combustion channels (1412), and the other end of the second distribution part (183) communicates with the first distribution part (181).

15. The burner plate according to claim 14, wherein, The gap formed between the first combustion channel (121) and the second distribution part (183) is a first gas transmission channel, and the first gas transmission channel communicates with the first combustion channel (121).

16. A combustion device, characterized in that, Including the combustion plate according to any one of claims 1 to 15.

17. A combustion system, characterized in that, Including the combustion device according to claim 16.

18. The combustion system according to claim 17, wherein The combustion system includes a gas supply device (200) and a mixing device (300). The gas supply device (200) includes a first ventilation component (210), a second ventilation component (230), and a third ventilation component (250). Both the first ventilation component (210) and the third ventilation component (250) are communicated with the intake end of the mixing device (300). The outlet end of the mixing device (300) is communicated with the first combustion channel (121). The second ventilation component (230) is communicated with the second combustion channel (1412). Wherein, the third ventilation component (250) is used for conveying one of fuel gas and combustion-supporting gas, and both the first ventilation component (210) and the second ventilation component (230) are used for conveying the other of fuel gas and combustion-supporting gas. At least one of the first ventilation component (210) and the second ventilation component (230) can be conducted.

19. The combustion system according to claim 18, wherein, The combustion plate further includes a distribution part (180). The second ventilation component (230) is communicated with the second combustion channel (1412) through the distribution part (180).

20. A gas device, characterized in that, It includes the combustion system according to any one of claims 17 to 19.

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