Combustor, combustion system and gas equipment

Abstract

The invention relates to a combustor, a combustion system and gas equipment. The combustor comprises a main shell provided with an air duct; the first combustion module and the second combustion module are mutually nested in the first direction, the first combustion module is connected to one end of the main shell in a matched mode, at least part of the first combustion module is located in the air duct, the first combustion module is provided with at least one first combustion hole, the second combustion module is provided with at least one second combustion hole, and each second combustion hole is located in one first combustion hole; a gap formed between the hole wall of the first combustion hole and the hole wall of the second combustion hole forms a first combustion channel, the second combustion hole forms a second combustion channel, and one of the first combustion channel and the second combustion channel is communicated with the air duct; the combustion chamber is connected to the main shell in a matched mode and located outside the air flue, and the combustion chamber is provided with a combustion cavity communicating with the first combustion channel and the second combustion channel. The burner is simple in structure and convenient to assemble, and therefore better sealing can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of gas heat exchange equipment, and particularly to a burner, a combustion system and a gas equipment. 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 also 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, a 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 fully 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. Fully premixed combustion is that gas and air are completely mixed in a certain proportion and then burn in the air, which has the advantages of high combustion intensity, strong flame propagation ability and short flame, so it is more and more widely used in gas water heaters.

[0004] However, at present, the structure of the combustion system of a gas water heater adopting fully premixed combustion is relatively complex, the assembly process is complicated, the clearance between each part is large, and there is residual air entering the interior of the combustion system during the combustion process, which not only affects the combustion effect, but also increases the load on the blower and reduces the service life of the blower. Summary of the Invention

[0005] Based on this, in view of the problems of relatively complex structure, complicated assembly process and large clearance between each part of the combustion system of a gas water heater, it is necessary to provide a burner, a combustion system and a gas equipment.

[0006] A burner, comprising:

[0007] A main housing provided with an air duct;

[0008] A first combustion module and a second combustion module nested with each other in a first direction, are connected to one end of the main housing and are at least partially located in the air duct. The first combustion module is provided with at least one first combustion hole, and the second combustion module is provided with at least one second combustion hole. Each second combustion hole is located within a first combustion hole, and a gap formed between the hole wall of the first combustion hole and the hole wall of the second combustion hole forms a first combustion channel, and the second combustion hole forms a second combustion channel. One of the first combustion channel and the second combustion channel is communicated with the air duct; and

[0009] A combustion chamber, is connected to the main housing and is located outside the air duct. The combustion chamber has a combustion cavity communicating the first combustion channel and the second combustion channel.

[0010] In one embodiment, the main housing includes a first sub-housing and a second sub-housing. The first sub-housing and the second sub-housing are connected to each other in a second direction intersecting the first direction to jointly enclose and form the air duct.

[0011] In one embodiment, the second combustion module is connected to the main housing and is at least partially received in the air duct. The first combustion module is nested on a side of the second combustion module close to the combustion cavity. The edges of the main housing, the edges of the first combustion module, and the edges of the combustion chamber are stacked and connected along the first direction.

[0012] In one embodiment, a contact medium is provided between the edge of the main housing and the edge of the first combustion module, and / or

[0013] A contact medium is provided between the edge of the first combustion module and the edge of the combustion chamber.

[0014] In one embodiment, a limiting portion is provided inside the main housing, and a supporting portion is provided at the edge of the second combustion module. The supporting portion supports and connects to the limiting portion.

[0015] In one embodiment, the second combustion module includes a distribution portion. An opening groove is provided on a side of the main housing away from the combustion chamber. The distribution portion at least partially penetrates through the opening groove. The limiting portion is provided on the circumference of the opening groove, and the supporting portion is provided on the distribution portion. The supporting portion supports and connects to the limiting portion.

[0016] 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. The supporting portion is provided on the first distribution portion, and the first distribution portion at least partially penetrates through the opening groove.

[0017] In one embodiment, at least a part of the second combustion channels are distributed in the same direction and form a sub-combustion zone, and the number of the sub-combustion zones corresponds to the number of the second distribution parts.

[0018] In one embodiment, one end edge of the main housing has a first flange, and an edge of the first combustion module has a second flange, and the first flange supports and connects to the second flange.

[0019] In one embodiment, an edge of the combustion chamber has a third flange, and the third flange supports and connects to the second flange.

[0020] In one embodiment, the first combustion module has a cooling unit, the first flange has a first sealing part, the third flange has a second sealing part, and the first sealing part and the second sealing part enclose a receiving space for receiving the cooling unit.

[0021] In one embodiment, the first combustion holes are formed in the first combustion module, the second combustion module includes at least one combustion part, each of the second combustion holes is formed in one of the combustion parts, and each of the combustion parts extends into one of the first combustion holes.

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

[0023] In one embodiment, the combustion system includes a gas supply device, the gas supply device includes a first ventilation component, a second ventilation component, and a third ventilation component, the first ventilation component is communicated with the second combustion module, and both the second ventilation component and the third ventilation component are communicated with the air duct;

[0024] Wherein, the third ventilation component is used for transporting one of fuel gas and combustion-supporting gas, the first ventilation component and the second ventilation component are respectively used for transporting 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 second combustion module includes a distribution part, one end of the distribution part is communicated with the second combustion channel, and the other end of the distribution part is communicated with the first ventilation component.

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

[0027] The above burner, the mutually nested first combustion module and the second combustion module form a first combustion channel and a second combustion channel, and gas or a mixture of gas and air can be introduced into the first combustion channel or the second combustion channel, so that the switching between premixed combustion and diffusion combustion can be realized or premixed combustion and diffusion combustion can be carried out simultaneously. Moreover, the burner is mainly formed by assembling a main housing, a first combustion module, a second combustion module and a combustion chamber, with a relatively simple structure and convenient assembly, so that better sealing can be achieved, thereby improving the heat exchange efficiency of the gas water heater and enhancing the user's comfort. Description of the Drawings

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

[0029] Figure 2 is Figure 1 an exploded schematic diagram of the shown burner.

[0030] Figure 3 It is an assembly schematic diagram of a first combustion module and a second combustion module according to an embodiment of the present application.

[0031] Figure 4 It is a schematic structural diagram of a main housing according to an embodiment of the present application.

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

[0033] Figure 6 is Figure 5 a schematic diagram when the shown second combustion module is assembled with the first sub-housing.

[0034] Figure 7 is Figure 5 a schematic diagram after the shown second combustion module is assembled to the first sub-housing.

[0035] Figure 8 It is a schematic structural diagram of a first combustion module according to an embodiment of the present application.

[0036] Figure 9 It is a schematic structural diagram of a combustion chamber according to an embodiment of the present application.

[0037] Description of the Reference Numerals:

[0038] 100, Burner; 20, Main housing; 20a, First sub-housing; 20b, Second sub-housing; 20c, Air duct; 20d, First air inlet; 20e, Second air inlet; 20f, Open slot; 21, Limiting part; 23, First flange; 232, First sealing part; 30, Third ventilation component; 40, First combustion module; 41, Combustion plate; 412, First combustion channel; 414, Second flange; 43, Cooling unit; 60, Second combustion module; 61, First distribution part; 63, Second distribution part; 65, Combustion part; 652, Second combustion channel; 67, Support part; 80, Combustion chamber; 80a, Combustion cavity; 81, Third flange; 812, Second sealing part. Detailed implementation manners

[0039] To make the above objects, features, and advantages of the present application more apparent 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 to facilitate a full understanding of 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.

[0040] In the description of the present application, it should be understood that if such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the 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 thus should not be construed as a limitation of the present application.

[0041] In addition, if such terms as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plural" appears, the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In this application, unless otherwise clearly specified or limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; 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 limited. 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.

[0043] In this application, unless otherwise clearly specified or limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning may be that the first and second features are in direct contact, or the first and second features are indirectly in 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 is at a higher horizontal level 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 is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. If 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. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation manner.

[0045] Refer to Figure 1 , a gas device provided by an embodiment of this application. The gas device 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 burner 100, which can use the heat generated by gas resources to provide hot water for users. Taking a gas water heater as an example below, the structure of the burner 100 in this application will be described. This embodiment is only used as an example for illustration and will not limit the technical scope of this application. It can be understood that in other embodiments, the burner 100 can also be applied to heating devices such as wall-mounted boilers, which are not limited here.

[0046] As Figures 1 to 4 shown, the burner 100 includes a main housing 20, a first combustion module 40, a second combustion module 60, and a combustion chamber 80. The main housing 20 is provided with an air duct 20c. The first combustion module 40 and the second combustion module 60 are arranged along a first direction (i.e., Figure 1They are nested with each other in the Z direction, are fitted to one end of the main housing 20 and are at least partially located in the air duct 20c. The first combustion module 40 is provided with at least one first combustion hole, and the second combustion module 60 is provided with at least one second combustion hole. Each second combustion hole is located in a first combustion hole, and a gap formed between the hole wall of the first combustion hole and the hole wall of the second combustion hole forms a first combustion channel 412. The second combustion hole forms a second combustion channel 652. One of the first combustion channel 412 and the second combustion channel 652 is in communication with the air duct 20c. The combustion chamber 80 is fitted to the main housing 20 and is located outside the air duct 20c. The combustion chamber 80 has a combustion cavity 80a that communicates the first combustion channel 412 and the second combustion channel 652. Fuel gas and combustion-supporting gas can burn in the combustion cavity 80a.

[0047] In this way, the mutually nested first combustion module 40 and second combustion module 60 form a first combustion channel 412 and a second combustion channel 652. Fuel gas and combustion-supporting gas can be introduced into the first combustion channel 412 or the second combustion channel 652, so that the switching between premixed combustion and diffusion combustion can be realized or premixed combustion and diffusion combustion can be carried out simultaneously. Moreover, the burner 100 is mainly assembled from the main housing 20, the first combustion module 40, the second combustion module 60 and the combustion chamber 80. The structure is relatively simple and the assembly is relatively convenient, so that better sealing can be achieved, and further the heat exchange efficiency of the gas water heater can be improved and the user's comfort can be enhanced.

[0048] In some embodiments, the main housing 20 is in the shape of a hollow housing to form an air duct 20c. The air duct 20c has an air inlet end and an air outlet end that are oppositely arranged and communicate with each other. The air inlet end is provided with a first air inlet 20d and a second air inlet 20e. The first air inlet 20d is used to connect the second ventilation assembly, and the second air inlet 20e is provided with a third ventilation assembly 30. The first combustion module 40, the second combustion module 60 and the combustion chamber 80 are all located at the air outlet end of the air duct 20c. In this way, the gas of the second ventilation assembly can enter the air duct 20c through the first air inlet 20d, and air can enter the air duct 20c through the second air inlet 20e under the action of the third ventilation assembly 30, and then flow along the air duct 20c to the air outlet end.

[0049] Specifically, in one embodiment, the main housing 20 is of a split type, including a first sub-housing 20a and a second sub-housing 20b. The first sub-housing 20a and the second sub-housing 20b are mutually fitted to jointly enclose and form the air duct 20c. More specifically, the central axis of the air outlet end of the air duct 20c extends along a first direction, the width direction of the air outlet end of the air duct 20c extends along a second direction (i.e., Figure 1 the X direction in Figure 1extends in the Y direction), the first sub - housing 20a and the second sub - housing 20b are matingly connected to each other along the second direction. Among them, the first direction, the second direction, and the third direction intersect pairwise. As a preferred embodiment, the first direction, the second direction, and the third direction are pairwise perpendicular.

[0050] Further, in some embodiments, a groove is provided on one side edge of the first sub - housing 20a for connecting the second sub - housing 20b, and a protrusion is provided on one side edge of the second sub - housing 20b for connecting the first sub - housing 20a. The protrusion can be inserted into the groove and adhesively bonded to each other with an adhesive. At the same time, fasteners such as screws are used for fastening connection, so as to realize the connection and fixation of the first sub - housing 20a and the second sub - housing 20b, thus forming an integral body.

[0051] The second combustion module 60 is matingly connected to the main housing 20 and at least partially received in the air duct 20c. The first combustion module 40 is nested on one side of the second combustion module 60 close to the combustion chamber 80a. The edges of the main housing 20, the edges of the first combustion module 40, and the edges of the combustion chamber 80 are stacked and connected to each other along the first direction. In this way, the main housing 20, the first combustion module 40, and the combustion chamber 80 form a flange assembly, and the assembly method is simple and has good sealing performance.

[0052] Further, in some embodiments, a contact medium is provided between the edge of the main housing 20 and the edge of the first combustion module 40, and / or a contact medium is provided between the edge of the first combustion module 40 and the edge of the combustion chamber 80. The contact medium can be formed by using materials such as high - temperature resistant glass fiber, so as to improve the sealing performance between various parts, make the flame in the combustion chamber 80 not easily overflow, and at the same time reduce the load required by the fan, providing a better environment for combustion.

[0053] Please combine Figure 5 、 Figure 6 and Figure 7As shown, in some embodiments, the second combustion module 60 is an integrally formed part, including a distribution part and at least one combustion part 65. One end of the distribution part is communicated with the second combustion channel 652, and the other end of the distribution part is communicated with the first ventilation component. Specifically, the distribution part includes a first distribution part 61 and at least one second distribution part 63. There are multiple second distribution parts 63, and the multiple second distribution parts 63 are arranged in sequence along the second direction. Each second distribution part 63 extends longitudinally along the third direction. The first distribution part 61 is arranged on one side of all the second distribution parts 63 in the first direction and at one end of all the second distribution parts 63 in the third direction. The first distribution part 61 is communicated with an external gas source. Multiple combustion parts 65 are arranged on each second distribution part 63. Each combustion part 65 has a columnar structure. A second combustion hole extending along the first direction is formed in each combustion part 65 to form a second combustion channel 652, and each second combustion channel 652 is communicated with the second distribution part 63. At least part of the second combustion channels 652 are distributed along the length direction of the second distribution part 63 to form sub-combustion areas, and the number of sub-combustion areas corresponds to the number of second distribution parts 63. In this way, the gas in the external gas source can enter all the second distribution parts 63 evenly through the first distribution part 61, and then enter the second combustion channels 652 of each combustion part 65.

[0054] In some embodiments, a limiting part 21 is provided in the main housing 20. The edge of the second combustion module 60 has a supporting part 67. The supporting part 67 supports and connects to the limiting part 21, so as to be limited in the main housing 20.

[0055] Specifically, in one embodiment, one side edge of the first distribution part 61 of the second combustion module 60 in the second direction has a supporting part 67. The supporting part 67 extends from one end of 61 to the other end of 61 along the third direction. On the opposite sides in the third direction inside the air outlet end of the air duct 20c of the main housing 20, limiting parts 21 are respectively provided, and the limiting parts 21 extend along the second direction. In this way, one end of the second distribution part 63 of the second combustion module 60 away from the first distribution part 61 in the third direction is supported on one of the limiting parts 21 of the main housing 20, and the supporting part 67 of the second combustion module 60 is supported on the other limiting part 21 and is connected to this limiting part 21 through fasteners such as screws.

[0056] In some other embodiments, a stepped surface is provided on one side of the main housing 20 away from the combustion chamber 80 in the third direction, and this stepped surface is located at one end of the main housing 20 in the second direction. An opening groove 20f extending along the first direction is formed on the stepped surface. The limiting part 21 is arranged on the circumference of the opening groove 20f. The supporting part 67 is arranged on the first distribution part 61 and surrounds the first distribution part 651 along the circumference. In this way, at least part of the first distribution part 61 penetrates through the opening groove 20f, and the supporting part 67 supports and connects to the limiting part 21, so as to realize the limitation of the second combustion module 60.

[0057] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 8 such that the first combustion module 40 is an integrally formed one-piece part, including a combustion plate 41 and a cooling unit 43. The combustion plate 41 is generally in the shape of a rectangular flat plate structure. The thickness direction of the combustion plate 41 extends along the first direction, the length direction of the combustion plate 41 extends along the third direction, and the width direction of the combustion plate 41 extends along the second direction. A plurality of first combustion holes are formed in the combustion plate 41, and all the first combustion holes are arranged in a matrix. Each first combustion hole extends along the first direction, and each first combustion hole is correspondingly arranged with a combustion part 65 of the second combustion module 60, and the inner diameter of the first combustion hole is larger than the outer diameter of the combustion part 65. The cooling unit 43 is arranged on opposite sides of the combustion plate 41 in the third direction and is communicated with the combustion plate 41, and is used to provide cooling liquid for the combustion plate 41, so as to play roles such as reducing the temperature of the first combustion module 40, absorbing the heat in the combustion chamber 80a, and preventing combustion flashback.

[0058] In this way, when the first combustion module 40 and the second combustion module 60 are nested in the first direction, each combustion part 65 of the second combustion module 60 extends correspondingly into a first combustion hole along the first direction, so as to form a coaxially arranged first combustion channel 412 and second combustion channel 652.

[0059] In some embodiments, one edge of the main housing 20 that forms the outlet end of the air duct 20c has a first flange 23, and the first flange 23 surrounds the main housing 20 in the circumferential direction. The edge of the combustion plate 41 of the first combustion module 40 has a second flange 414, and the second flange 414 surrounds the combustion plate 41 in the circumferential direction. In this way, the second flange 414 is supported on the first flange 23 in the first direction and is connected to the first flange 23 through fasteners such as screws, so as to realize the fixation of the first combustion module 40.

[0060] Please refer to Figure 1 、 Figure 2 and Figure 9 such that in some embodiments, the combustion chamber 80 is in the shape of a hollow rectangular frame structure to form a combustion chamber 80a. The edge of the combustion chamber 80 has a third flange 81, and the third flange 81 surrounds the combustion chamber 80 in the circumferential direction. The third flange 81 is supported and connected to the second flange 414 of the first combustion module 40 and is connected to the main housing 20 through fasteners.

[0061] In this way, the first flange 23 of the main housing 20, the second flange 414 of the first combustion module 40, and the third flange 81 of the combustion chamber 80 are stacked in sequence in the first direction and are connected to each other through fasteners to form a flange fit, so as to have good sealing performance.

[0062] As Figure 1 , Figure 2 , Figure 4 and Figure 9 shown, in some embodiments, the first flanges 23 on the opposite sides of the main housing 20 in the third direction respectively have first sealing portions 232, the first sealing portions 232 are recessed in a direction away from the first combustion module 40, the second sealing portions 812 are respectively provided at the opposite side edges of the combustion chamber 80 in the third direction, the second sealing portions 812 are recessed in a direction away from the first combustion module 40, the first sealing portions 232 and the second sealing portions 812 jointly enclose a receiving space for receiving the cooling unit 43, and the shape of the receiving space matches the shape of the cooling unit 43 to fit with the cooling unit 43, thereby ensuring the sealing performance at the connection of the main housing 20, the first combustion module 40 and the combustion chamber 80.

[0063] In some embodiments, the combustion system further includes a first ventilation assembly, a second ventilation assembly and a third ventilation assembly. The first ventilation assembly is communicated with the second combustion module 60, the second ventilation assembly is communicated with the air duct 20c through the first air inlet 20d, and the third ventilation assembly 30 is communicated with the air duct 20c. Wherein, the third ventilation assembly is used for conveying one of the fuel gas and the combustion-supporting gas, the first ventilation assembly and the second ventilation assembly are respectively used for conveying the other of the fuel gas and the combustion-supporting gas, and at least one of the first ventilation assembly and the second ventilation assembly can be conducted.

[0064] Thus, the burner 100 has a premixed combustion mode, a diffusion combustion mode and a dual combustion mode integrating premixed combustion and diffusion combustion.

[0065] When the burner 100 is in the premixed combustion mode: the first ventilation assembly is not conducted, the second ventilation assembly is conducted, the fuel gas enters the air duct 20c from the second ventilation assembly, the combustion-supporting gas enters the air duct 20c through the third ventilation assembly, after the fuel gas and the combustion-supporting gas are mixed in the air duct 20c, the mixed gas flows out from the first combustion channel 412 and is ignited to achieve premixed combustion.

[0066] When the burner 100 is in the diffusion combustion mode, the second ventilation assembly is not conducted, the first ventilation assembly is conducted, after the fuel gas enters the distribution part from the first ventilation assembly, it flows into the second combustion channel 652 through the distribution part, after the combustion-supporting gas enters the air duct 20c through the third ventilation assembly, the combustion-supporting gas flows out from the first combustion channel 412, and the fuel gas and the combustion-supporting gas enter the combustion chamber 80a and are ignited to achieve diffusion combustion.

[0067] When the burner 100 is in the dual combustion mode, the first air passage component is turned on, the second air passage component is turned on, the fuel gas enters the air duct 20c from the second air passage component, the combustion-supporting gas enters the air duct 20c through the third air passage component. After the fuel gas and the combustion-supporting gas are mixed in the air duct 20c, they flow out from the first combustion channel 412 and are ignited to achieve premixed combustion. After the fuel gas enters the distribution part from the first air passage component, it flows into the second combustion channel 652 through the distribution part. The combustion-supporting gas in the mixed gas in the first combustion channel 412 can be ignited with the fuel gas in the second combustion channel 652 in the combustion chamber 80a to achieve diffusion combustion at the same time.

[0068] As Figure 2 shown, in one embodiment, the installation steps of the above-mentioned burner 100 are as follows:

[0069] First, mate the first sub-shell 20a with the second sub-shell 20b to form a complete main shell 20. Then, install the second combustion module 60 at one end of the main shell 20. After that, sequentially place the first combustion module 40 and the combustion chamber 80 on the second combustion module 60. Finally, assemble and fix the main shell 20, the first combustion module 40, and the combustion chamber 80 with fasteners.

[0070] In another embodiment, the installation steps of the above-mentioned burner 100 are as follows:

[0071] First, mate the first combustion module 40 with the first sub-shell 20a. Then, splice the second sub-shell 20b with the first sub-shell 20a to form a complete main shell 20. After that, sequentially place the first combustion module 40 and the combustion chamber 80 on the second combustion module 60. Finally, assemble and fix the main shell 20, the first combustion module 40, and the combustion chamber 80 with fasteners.

[0072] The above-mentioned burner 100 and the gas water heater provided with it can support two combustion modes, namely premixed combustion and diffusion combustion. Moreover, the main parts are integrally formed, and the flange structure is used for connection and assembly between the main parts, which has good sealing performance and high assembly efficiency, and improves the heat exchange efficiency of the gas water heater and enhances the user's comfort.

[0073] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-mentioned 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 described in this specification.

[0074] 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 patented 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 fall within 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 burner, characterized in that, Comprising: A main housing (20) provided with an air duct (20c); A first combustion module (40) and a second combustion module (60) nested with each other in a first direction, which are connected to one end of the main housing (20) and at least partially located in the air duct (20c). The first combustion module (40) is provided with at least one first combustion hole, and the second combustion module (60) is provided with at least one second combustion hole. Each second combustion hole is located in a first combustion hole, and a gap formed between the hole wall of the first combustion hole and the hole wall of the second combustion hole forms a first combustion channel (412), and the second combustion hole forms a second combustion channel (652). One of the first combustion channel (412) and the second combustion channel (652) is communicated with the air duct (20c); and A combustion chamber (80), which is connected to the main housing (20) and located outside the air duct (20c), and the combustion chamber (80) has a combustion cavity (80a) communicating the first combustion channel (412) and the second combustion channel (652).

2. The burner according to claim 1, characterized in that, The main housing (20) includes a first sub-housing (20a) and a second sub-housing (20b), and the first sub-housing (20a) and the second sub-housing (20b) are connected to each other in a second direction intersecting the first direction to jointly enclose the air duct (20c).

3. The burner according to claim 1, characterized in that, The second combustion module (60) is connected to the main housing (20) and at least partially received in the air duct (20c), and the first combustion module (40) is nested on a side of the second combustion module (60) close to the combustion cavity (80a). The edges of the main housing (20), the first combustion module (40), and the combustion chamber (80) are stacked and connected in the first direction.

4. The burner according to claim 3, characterized in that, There is a contact medium between the edge of the main housing (20) and the edge of the first combustion module (40), and / or There is a contact medium between the edge of the first combustion module (40) and the edge of the combustion chamber (80).

5. The burner according to claim 1, characterized in that, A limiting part (21) is arranged in the main housing (20), and the edge of the second combustion module (60) has a supporting part (67), and the supporting part (67) supports and is connected to the limiting part (21).

6. The burner according to claim 5, characterized in that, The second combustion module (60) includes a distribution part. An opening groove (20f) is arranged on a side of the main housing (20) away from the combustion chamber (80). The distribution part at least partially penetrates through the opening groove (20f), the limiting part (21) is arranged on the circumference of the opening groove (20f), the supporting part (67) is arranged on the distribution part, and the supporting part (67) supports and is connected to the limiting part (21).

7. The burner according to claim 6, characterized in that, The distribution part includes a first distribution part (61) and a second distribution part (63). One end of the second distribution part (63) communicates with the second combustion channel (652), and the other end of the second distribution part (63) communicates with the first distribution part (61). The support part (67) is arranged on the first distribution part (61), and at least part of the first distribution part (61) penetrates through the opening groove (20f).

8. The burner according to claim 7, characterized in that, At least part of the second combustion channels (652) are distributed in the same direction and form sub-combustion zones, and the number of the sub-combustion zones corresponds to the number of the second distribution parts (63).

9. The burner according to claim 1, characterized in that, One end edge of the main housing (20) has a first flange (23), and the edge of the first combustion module (40) has a second flange (414). The first flange (23) supports and connects to the first flange (23).

10. The burner according to claim 9, characterized in that, The edge of the combustion chamber (80) has a third flange (81), and the third flange (81) supports and connects to the second flange (414).

11. The burner according to claim 10, characterized in that, The first combustion module (40) has a cooling unit (43). The first flange (23) has a first sealing part (232), and the third flange (81) has a second sealing part (812). The first sealing part (232) and the second sealing part (812) enclose a receiving space for receiving the cooling unit (43).

12. The burner according to claim 1, characterized in that, The first combustion holes are formed in the first combustion module (40). The second combustion module (60) includes at least one combustion part (65). Each of the second combustion holes is formed in one of the combustion parts (65), and each of the combustion parts (65) extends into one of the first combustion holes.

13. A combustion system, characterized in that, It includes the combustion device according to any one of claims 1 to 12.

14. The combustion system according to claim 13, wherein, The combustion system includes a gas supply device. The gas supply device includes a first ventilation component, a second ventilation component, and a third ventilation component. The first ventilation component communicates with the second combustion module, and both the second ventilation component and the third ventilation component communicate with the air duct; Wherein, the third ventilation component is used for transporting one of the fuel gas and the combustion-supporting gas, the first ventilation component and the second ventilation component are respectively used for transporting the other of the fuel gas and the combustion-supporting gas, and at least one of the first ventilation component and the second ventilation component can be conducted.

15. The combustion system according to claim 14, wherein The second combustion module (60) includes a distribution part. One end of the distribution part communicates with the second combustion channel (652), and the other end of the distribution part communicates with the first ventilation component.

16. A gas device, characterized in that, It includes the combustion system according to any one of claims 13 to 15.

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