Combustion system and gas water heating equipment

Abstract

The invention relates to a combustion system and gas water heating equipment. The combustion system comprises a combustion device which comprises a combustion assembly, and the combustion assembly comprises a combustion plate and a cooling flow channel used for cooling the combustion plate; and the combustion chamber structure is internally provided with a combustion inner cavity and a first heat exchange runner surrounding the combustion inner cavity, and the cooling runner communicates with the first heat exchange runner. The combustion system and the gas water heating equipment are high in heat utilization rate and heat exchange efficiency.

Description

Technical Field

[0001] The present application relates to the field of hot water technology, and in particular to a combustion system and a gas hot water device. Background Art

[0002] Gas water heaters are popular due to their superior hot water performance and are widely used in people's lives. The working principle of traditional gas water heaters to form hot water is: water flow exchanges heat with the flame and flue gas generated by combustion to form hot water for room heating, daily washing, etc. However, the heat utilization rate of traditional gas water heaters is not high and the heat exchange efficiency is low. Summary of the invention

[0003] In view of the above problems, according to various embodiments of the present application, a combustion system and a gas water heater are provided.

[0004] A combustion system, comprising:

[0005] A combustion device, comprising a combustion assembly, wherein the combustion assembly comprises a combustion plate and a cooling channel for cooling the combustion plate; and

[0006] The combustion chamber structure comprises a combustion inner cavity and a first heat exchange flow channel surrounding the combustion inner cavity, and the cooling flow channel is connected to the first heat exchange flow channel.

[0007] In some embodiments, a heat exchange device is further included, wherein a second heat exchange channel is disposed in the heat exchange device, and the second heat exchange channel is connected to the first heat exchange channel.

[0008] In some embodiments, the combustion chamber structure includes a coil, the inner surface of the coil defines the first heat exchange flow channel, the coil includes a plurality of circles of pipe segments, all of the sub-pipe segments are arranged axially along the combustion chamber structure and connected end to end in sequence, all of the sub-pipe segments define the combustion cavity, and two adjacent circles of the sub-pipe segments are sealed and connected.

[0009] In some embodiments, the combustion chamber structure includes an inner shell and an outer shell covering the inner shell, wherein the outer surface of the inner shell and the inner surface of the outer shell are either recessed in a direction away from the other and define the first heat exchange channel with the other, the first heat exchange channel extends along the circumference of the inner shell, and the inner surface of the inner shell encloses the combustion cavity;

[0010] The partition structure is arranged in the first heat exchange channel and divides the first heat exchange channel into at least two sub-channels arranged along the width direction of the first heat exchange channel.

[0011] In some of the embodiments, the combustion plate is provided with combustion holes, and the combustion holes are independent of the cooling flow channel.

[0012] In some of the embodiments, the cooling channel is arranged around the combustion hole.

[0013] In some of the embodiments, the combustion holes are arranged in the same direction as a combustion hole group; the cooling flow channels are arranged alternately with the combustion holes in the combustion hole group, and / or the cooling flow channels are arranged alternately with the combustion hole group.

[0014] In some of the embodiments, the combustion holes are arranged as the combustion hole groups along the length direction of the combustion plate, and the cooling channels and the combustion hole groups are alternately arranged along the width direction of the combustion plate; and / or the combustion holes are arranged as the combustion hole groups along the width direction of the combustion plate, and the cooling channels and the combustion hole groups are alternately arranged along the length direction of the combustion plate.

[0015] In some of the embodiments, the combustion device further comprises a flame stabilizing net, and the flame stabilizing net covers the combustion holes of the combustion plate.

[0016] A gas water heater comprises a combustion system as described in any one of the embodiments.

[0017] The above combustion system and gas water heater can fully utilize and reuse the heat in the flame combustion process by providing a cooling channel connected to the first heat exchange channel, and the heat utilization rate and heat exchange efficiency are effectively improved.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0020] Figure 1 This is a schematic structural diagram of the coordination of a combustion device, a combustion chamber structure and a heat exchange device of a combustion system in some embodiments of the present application.

[0021] Figure 2 for Figure 1The combustion device, combustion chamber structure and heat exchange device shown are schematically shown in another perspective after being coordinated.

[0022] Figure 3 for Figure 1 The front view of the combustion device, combustion chamber structure and heat exchange device after coordination is shown.

[0023] Figure 4 This is a schematic diagram of the structure of the combustion assembly in some embodiments of the present application.

[0024] Figure 5 This is a schematic diagram of the structure of the combustion assembly in other embodiments of the present application.

[0025] Figure 6 This is an overall schematic diagram of the combustion chamber structure in some embodiments of the present application.

[0026] Figure 7 for Figure 6 The combustion chamber structure shown is a cross-sectional view along the AA direction.

[0027] Figure 8 This is an overall schematic diagram of the combustion chamber structure in other embodiments of the present application.

[0028] Fig. 9 for Figure 8 An exploded view of the combustion chamber structure is shown.

[0029] Fig.10 for Figure 8 A front view of the combustion chamber structure is shown.

[0030] Fig.11 for Fig.10 The combustion chamber structure shown is a cross-sectional view along the BB direction.

[0031] Fig.12 This is a schematic structural diagram of the coordination of a combustion device, a mixing device and an air supply device of a combustion system in some embodiments of the present application.

[0032] Figure Number:

[0033] 1. Combustion system;

[0034] 10. Combustion chamber structure; 11. Coil; 111. Sub-tube section; 112. First circle tube section; 113. Tail circle tube section; 114. Combustion inner cavity; 12. First heat exchange flow channel; 121. Sub-flow channel; 13. Inner shell; 14. Outer shell; 15. Partition structure; 20. Combustion device; 21. Combustion assembly; 211. Combustion plate; 2111. Combustion hole; 2111a. First combustion hole; 2111b. Second combustion hole; 2112. Cooling flow channel; 212. Flame stabilizing net; 213. Combustion outer shell;

[0035] 30. heat exchange device; 31. heat exchange inner cavity; 32. heat exchange outer shell;

[0036] 40. Air supply device; 41. First ventilation assembly; 411. First control valve; 412. First ventilation pipe; 42. Second ventilation assembly; 421. Second control valve; 422. Second ventilation pipe; 43. Third ventilation assembly; 431. First air supply member; 432. Third ventilation pipe;

[0037] 50. Mixing device. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth 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 violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] 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 be a central 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 a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0044] Please also read Figures 1 to 7 The present application provides a combustion system 1, which includes a combustion device 20 and a combustion chamber structure 10. The combustion device 20 includes a combustion assembly 21, and the combustion assembly 21 includes a combustion plate 211 and a cooling channel 2112 for cooling the combustion plate 211. The combustion chamber structure 10 has a combustion cavity 114 and a first heat exchange channel 12 surrounded by the combustion cavity 114, and the cooling channel 2112 is connected to the first heat exchange channel 12.

[0045] The cooling channel 2112 is connected to an external water source through a pipeline assembly, and the external water source is Fig.12 The direction indicated by the arrow R1 flows into the pipeline component.

[0046] The combustion device 20 includes a combustion casing 213 , and the combustion assembly 21 is disposed in the combustion casing 213 .

[0047] The cooling channel 2112 may be formed in the combustion plate 211, or may be formed in a cooling member in the combustion assembly 21 that is independent of the combustion plate 211. The specific formation of the cooling channel 2112 is not limited herein.

[0048] The combustion plate 211 is used to output fuel gas, or output a mixed gas of fuel gas and combustion-supporting gas in advance, or output unmixed fuel gas and combustion-supporting gas at the same time, so as to burn and form flames and smoke in the combustion cavity 114. Optionally, the fuel gas is fuel gas, and the combustion-supporting gas is air and / or oxygen.

[0049] During the flame combustion process, water flows in the cooling channel 2112 and can absorb the heat of the combustion plate 211 to cool the combustion plate 211. Afterwards, since the cooling channel 2112 is connected to the first heat exchange channel 12, the water that has absorbed the heat of the combustion plate 211 flows into the first heat exchange channel 12 and absorbs the heat of the flame and smoke in the combustion cavity 114 to form hot water with a higher temperature, thereby facilitating the subsequent reuse of the hot water, such as room heating, daily washing, etc.

[0050] It can be seen that in the present application, by providing the cooling channel 2112 in communication with the first heat exchange channel 12, the heat generated during the flame combustion process can be fully utilized and reused, and the heat utilization rate and heat exchange efficiency are effectively improved.

[0051] Moreover, it is worth mentioning that the provision of the first heat exchange flow channel 12 can also reduce the temperature of the combustion chamber structure 10, so that the risk of high-temperature melting deformation of the combustion chamber structure 10 is reduced, and the service life is longer. In addition, the combustion chamber structure 10 with a reduced temperature has a reduced degree of thermal influence on the components (such as the heat exchange device 30, etc.) disposed adjacent thereto. It can be understood that if the temperature of the combustion chamber structure 10 is too high, the heat thereon is easily radiated to the adjacent components, causing the components to melt and deform at high temperature or to have a working failure.

[0052] In some embodiments of the present application, the combustion system 1 further includes a heat exchange device 30 , in which a second heat exchange channel is disposed, and the second heat exchange channel is connected to the first heat exchange channel 12 .

[0053] The heat exchange device 30 includes a heat exchange shell 32, and a heat exchange inner cavity 31 is formed in the heat exchange shell 32. The heat exchange inner cavity 31 is connected to the combustion inner cavity 114, and the smoke formed after combustion enters the heat exchange inner cavity 31 from the combustion inner cavity 114. The second heat exchange flow channel is located in the heat exchange inner cavity 31 and is independently arranged relative to the heat exchange inner cavity 31. After the smoke enters the heat exchange inner cavity 31, the water flow output from the first heat exchange flow channel 12 enters the second heat exchange flow channel and performs heat exchange with the smoke in the heat exchange inner cavity 31.

[0054] The heat exchange cavity 31 is the main heat exchange place in the combustion system 1. The hot water formed after the water flows through the cooling channel 2112 and the first heat exchange channel 12 flows into the second heat exchange channel, and after heat exchange with the flue gas, the heat rises significantly, so that the hot water can be reused later.

[0055] It can be seen that in the present application, by setting the second heat exchange channel to be connected with the first heat exchange channel 12, the water flow can flow through the cooling channel 2112, the first heat exchange channel 12 and the second heat exchange channel in sequence. Under this design, it is conducive to fully utilizing the heat generated during the flame combustion process, and the heat utilization rate and heat exchange efficiency are effectively improved.

[0056] Please refer again Figure 6 and Figure 7 In some embodiments of the present application, the combustion chamber structure 10 includes a coil 11, the inner surface of the coil 11 defines a first heat exchange channel 12, the coil 11 includes a plurality of ring segments 111, all of the sub-segments 111 are arranged along the axial direction of the combustion chamber structure 10 and are connected end to end in sequence, all of the sub-segments 111 define a combustion cavity 114, and two adjacent ring segments 111 are sealed and connected.

[0057] Specifically, the inner surfaces of all the sub-tube segments 111 define a combustion chamber 114 .

[0058] The coil 11 is a hollow structure, and the inner surface of the coil 11 refers to the inner wall surface of the pipe structure surrounding the inside of the coil 11. The pipe structure inside the coil 11 is equivalent to the first heat exchange flow channel 12. The inner surface of the sub-pipe segment 111 refers to the surface of the sub-pipe segment 111 facing the central axis of the combustion chamber structure 10, and the inner surface of the sub-pipe segment 111 is actually part of the outer surface of the coil 11. The extension direction of the central axis of the combustion chamber structure 10 is the axial direction of the combustion chamber structure 10.

[0059] The coil 11 is generally made of a metal material with excellent thermal conductivity and high temperature resistance, such as a copper tube.

[0060] Optionally, each two adjacent circle pipe segments 111 can be sealed together by filling with external components, such as gluing, soldering, etc., or by direct sealing contact, which can be specifically set according to the difficulty of the process.

[0061] The coil 11 has at least two circles of tube segments 111, preferably at least three circles of tube segments 111. The more circles of sub-tube segments 111 there are, the larger the size of the combustion cavity 114 defined by the inner surfaces of all sub-tube segments 111 in the axial direction of the combustion chamber structure 10 is, so as to facilitate the complete accommodation of the flame. For the convenience of description, the following embodiments are all described by taking the coil 11 having at least three circles of tube segments 111 as an example.

[0062] When the inlet of the coil 11 and the outlet of the coil 11 are collinearly arranged on a straight line extending in the axial direction of the parallel combustion chamber structure 10, each circle pipe segment 111 is a complete circle pipe segment arranged around the winding direction of the coil 11. When the inlet of the coil 11 and the outlet of the coil 11 are not collinearly arranged on a straight line extending in the axial direction of the parallel combustion chamber structure 10, there is a sub-pipe segment 111 that is less than one circle among all the sub-pipe segments 111, and the sub-pipe segment 111 that is less than one circle is an intermediate sub-pipe segment connected to the first circle pipe segment 112 and the tail circle pipe segment 113. Among them, the first circle pipe segment 112 and the tail circle pipe segment 113 are two complete circles of sub-pipe segments 111 arranged in the axial direction of the combustion chamber structure 10 and the farthest apart, and each circle pipe segment 111 connected between the first circle pipe segment 112 and the tail circle pipe segment 113 is an intermediate sub-pipe segment.

[0063] The coil 11 is used to provide a space for accommodating water flow, and the inner surfaces of all the sub-pipe sections 111 in the coil 11 define a combustion cavity 114 for accommodating flames and smoke. In actual operation, the gas output by the combustion device 20 burns in the combustion cavity 114 of the combustion chamber structure 10 to form flames and smoke, and the water flow flowing in the coil 11 absorbs the heat of the flames and smoke and heats up to form hot water.

[0064] In the present application, the inner surface of all the sub-tube segments 111 of the coil 11 is directly defined to form a combustion cavity 114, and the inner surface of the coil 11 is defined to form a first heat exchange channel 12. In this way, the heat of the flame and smoke in the combustion cavity 114 can be transferred to the water flow in the first heat exchange channel 12 only through the coil 11, which not only reduces the number of heat transfer parts and simplifies the manufacturing process, but also improves the heat transfer efficiency, heat utilization rate and heat exchange efficiency. In addition, since each adjacent two circle tube segments 111 are sealed and connected, the possibility of the heat of the combustion cavity 114 diffusing to the outside through each adjacent two circle tube segments 111 is reduced, and the heat loss is also reduced, and the heat exchange efficiency is improved.

[0065] See also Figures 8 to 11 In some embodiments of the present application, the combustion chamber structure 10 includes an inner shell 13 and an outer shell 14 covering the inner shell 13. One of the outer surface of the inner shell 13 and the inner surface of the outer shell 14 is recessed in a direction away from the other, and defines a first heat exchange channel 12 with the other. The first heat exchange channel 12 extends along the circumference of the inner shell 13, and the inner surface of the inner shell 13 encloses a combustion cavity 114. The partition structure 15 is disposed in the first heat exchange channel 12, and the first heat exchange channel 12 is partitioned to form at least two sub-channels 121 arranged along the width direction of the first heat exchange channel 12.

[0066] The inner shell 13 and the outer shell 14 are generally made of metal materials with good thermal conductivity and high temperature resistance, such as stainless steel, copper, etc. Preferably, the inner shell 13 and the outer shell 14 are both made of stainless steel. Stainless steel has good corrosion resistance, which can reduce the possibility of corrosion and perforation of the inner shell 13 and the outer shell 14, and has a longer service life.

[0067] After the outer shell 14 is covered on the inner shell 13, the outer shell 14 and the inner shell 13 are first glued together, and then the outer shell 14 and the inner shell 13 are welded. The glue and welding work together to reduce the risk of water leakage in the heat exchange flow channel due to desoldering and welding between the outer shell 14 and the inner shell 13, thereby improving the sealing of the outer shell 14 and the inner shell 13.

[0068] The partition structure 15 may be other structures independent of the inner shell 13 and the outer shell 14, and connected to the inner shell 13 and the outer shell 14 by welding, gluing, detachable connection, etc., so as to separate the first heat exchange flow channel 12 into at least two sub-flow channels 121. Alternatively, the partition structure 15 may also be a structure formed by stamping the inner shell 13 or the outer shell 14.

[0069] When the combustion chamber structure 10 is working, the water flows in the first heat exchange flow channel 12 and absorbs the heat of the flame and smoke in the combustion cavity 114. In this process, the temperature of the inner shell 13 and the outer shell 14 decreases, so that not only the risk of the inner shell 13 and the outer shell 14 being deformed due to high temperature melting is reduced, but also the degree of heat influence of the combustion chamber structure 10 on the components (such as the heat exchange device 30, etc.) located outside the outer shell 14 and adjacent to the outer shell 14 is reduced.

[0070] Exemplarily, there may be one or more partition structures 15, and the number of partition structures 15 is defined as N. All partition structures 15 are arranged at intervals along the width direction of the heat exchange channel, and the heat exchange channel is divided into (N+1) sub-channels 121. For example, taking one partition structure 15 as an example, the first heat exchange channel 12 is divided into two sub-channels 121. For another example, taking two partition structures 15 as an example, the first heat exchange channel 12 is divided into three sub-channels 121.

[0071] The width direction of the first heat exchange channel 12 (eg Figure 8 The arrow C in the middle) can be aligned with the axial direction of the combustion chamber structure 10 (such as Figure 8The width direction of the first heat exchange channel 12 intersects or is parallel to the axial direction of the combustion chamber structure 10. The intersection of the width direction of the first heat exchange channel 12 and the axial direction of the combustion chamber structure 10 means that the angle between the width direction of the first heat exchange channel 12 and the axial direction of the combustion chamber structure 10 is an acute angle, a right angle or an obtuse angle. For the convenience of explanation, the following embodiments are described by taking the case where the width direction of the first heat exchange channel 12 is parallel to the axial direction of the combustion chamber structure 10 as an example.

[0072] Either the outer surface of the inner shell 13 or the inner surface of the outer shell 14 is recessed in a direction away from the other, and defines a first heat exchange channel 12 with the other. The first heat exchange channel 12 may be formed between the recessed area on the outer surface of the inner shell 13 and the inner surface of the outer shell 14, or the first heat exchange channel 12 may be formed between the recessed area on the inner surface of the outer shell 14 and the outer surface of the inner shell 13.

[0073] In the present application, the inner surface of the inner shell 13 defines a combustion cavity 114, and the outer shell 14 and the inner shell 13 enclose a first heat exchange channel 12. This design uses fewer parts and simplifies the construction and processing difficulty of the combustion chamber structure 10.

[0074] In addition, the first heat exchange channel 12 is divided into at least two sub-channels 121, and the cross-sectional area of ​​each sub-channel 121 is smaller than the cross-sectional area of ​​the first heat exchange channel 12. When the flow rate input into the first heat exchange channel 12 remains unchanged, the smaller the cross-sectional area, the greater the flow rate. Therefore, when the flow rate of the water flow input into the combustion chamber structure 10 remains unchanged, the water flow velocity flowing in each sub-channel 121 is faster than the water flow velocity in the undivided first heat exchange channel 12, the heat exchange efficiency of the water flow is improved, and the cooling effect of the combustion chamber structure 10 is also better.

[0075] Please refer again Figure 4 and Figure 5 In some embodiments of the present application, a combustion hole 2111 is opened on the combustion plate 211 , and the combustion hole 2111 is independent of the cooling channel 2112 .

[0076] Preferably, there are multiple combustion holes 2111 , and the combustion holes 2111 are arranged along the length direction and / or width direction of the combustion plate 211 .

[0077] Please also read Fig.12 The combustion holes 2111 on the combustion plate 211 are used to output fuel gas, or to output a mixed gas of fuel gas and combustion-supporting gas in advance, or to output unmixed fuel gas and combustion-supporting gas at the same time, so as to burn in the combustion cavity 114 to form flames and smoke. Optionally, the fuel gas is fuel gas, and the combustion-supporting gas is air and / or oxygen. The combustion system 1 further includes a gas supply device 40, which is used to deliver gas to the combustion holes 2111.

[0078] When the combustion holes 2111 on the combustion plate 211 are used to output fuel gas, the gas supply device 40 delivers fuel gas into the combustion holes 2111. When the combustion holes 2111 on the combustion plate 211 are used to output a mixed gas of fuel gas and combustion-supporting gas mixed in advance, the gas supply device 40 delivers the mixed gas into the combustion holes 2111. When the combustion holes 2111 on the combustion plate 211 are used to simultaneously output unmixed fuel gas and combustion-supporting gas, there are at least two combustion holes 2111, and the gas supply device 40 inputs fuel gas into at least one combustion hole 2111, and inputs combustion-supporting gas into at least one combustion hole 2111. The specific structure of the gas supply device 40 is not limited here, and it only needs to be able to supply gas to the combustion holes 2111 and achieve combustion.

[0079] By setting the combustion hole 2111 and the cooling channel 2112 on the combustion plate 211, the water flowing in the cooling channel 2112 can cool the combustion plate 211. This design can reduce the temperature of the gas output from the combustion hole 2111, and then the temperature of the flame formed by the combustion is also reduced. The propagation speed of the flame is related to its own temperature. The lower the temperature of the flame, the slower its propagation speed. Therefore, when the temperature of the flame is reduced, the speed at which the flame returns to the combustion hole 2111 will also be reduced, the possibility of flashback is reduced, and the combustion stability is better.

[0080] In some embodiments, there are at least two combustion holes 2111, and all the combustion holes 2111 include at least one first combustion hole 2111a and at least one second combustion hole 2111b. The combustion plate 211 includes a first combustion mode and / or a second combustion mode. In the first combustion mode, one of the fuel gas and the combustion-supporting gas is output from the first combustion hole 2111a, and the other of the fuel gas and the combustion-supporting gas is output from the second combustion hole 2111b; in the second combustion mode, a mixed gas of the fuel gas and the combustion-supporting gas is output from the second combustion hole 2111b or the first combustion hole 2111a.

[0081] For example, when the first combustion mode is adopted, the fuel gas is output from the first combustion hole 2111a, and the combustion-supporting gas is output from the second combustion hole 2111b. At this time, the combustion plate 211 is in diffusion combustion, ensuring the flame stability during diffusion combustion; when the second combustion mode is adopted, the first combustion hole 2111a does not spray gas, and the second combustion hole 2111b outputs the mixed gas of fuel gas and combustion-supporting gas. At this time, the combustion plate 211 is in premixed combustion, which can shorten the flame length during premixed combustion and achieve stable combustion. In addition, when the heat load demand is small, turning on the first combustion mode is not easy to cause flashback; when the heat load demand is large, turning on the second combustion mode can effectively reduce the generation of exhaust gas.

[0082] The above-mentioned combustion plate 211 having the first combustion hole 2111a and the second combustion hole 2111b, the same combustion plate 211 can meet the needs of different combustion modes at the same time; when the heat load demand is small, turning on the first combustion mode can realize the premixing of the gas during diffusion combustion, thereby improving the combustion efficiency; when the heat load demand is large, turning on the second combustion mode can effectively reduce the generation of exhaust gas.

[0083] In this embodiment, the combustion system 1 further includes a mixing device 50, which is in communication with the second combustion hole 2111b, and the air supply device 40 includes a first ventilation component 41, a second ventilation component 42 and a third ventilation component 43, the second ventilation component 42 and the third ventilation component 43 are both in communication with the mixing device 50, and the first ventilation component 41 is in communication with the first combustion hole 2111a;

[0084] Among them, the first ventilation assembly 41 and the second ventilation assembly 42 are both used to transport one of the fuel gas or the combustion-supporting gas, and the third ventilation assembly 43 is used to transport the other of the fuel gas or the combustion-supporting gas. At least one of the first ventilation assembly 41 and the second ventilation assembly 42 can be conducted.

[0085] In actual use, the user can select to connect at least one of the first ventilation assembly 41 and the second ventilation assembly 42 according to the heat load demand, that is, the user can select at least one corresponding channel for supplying fuel gas or combustion-supporting gas according to the heat load demand.

[0086] For example, in an embodiment where the third ventilation assembly 43 delivers combustion-supporting gas, and the first ventilation assembly 41 and the second ventilation assembly 42 deliver fuel gas:

[0087] When the heat load is small, the first combustion mode is turned on, and only the first ventilation component 41 is turned on, air flows into the mixing device 50 and is ejected from the second combustion hole 2111b connected to the mixing device 50, and the gas is ejected from the first combustion hole 2111a connected to the first ventilation component 41. After the gas and air are mixed in the combustion device 20, they are ignited by the ignition needle and burn in the combustion chamber of the combustion device 20, so that stable flame combustion can be achieved;

[0088] When the heat load is large, the second combustion mode is turned on, and only the second ventilation assembly 42 is turned on, air flows into the mixing device 50, and the gas flows into the inside of the mixing device 50, the air and the gas are mixed in the mixing device 50, and are ejected from the second combustion hole 2111b connected to the mixing device 50, and the mixed gas is ignited by the ignition needle and burns in the combustion chamber of the combustion device 20, which can achieve full combustion, high combustion efficiency, and less exhaust gas.

[0089] When the first combustion mode and the second combustion mode are turned on at the same time, the first ventilation assembly 41 and the second ventilation assembly 42 are turned on at the same time, the gas is ejected from the first combustion hole 2111a, and the mixture of gas and air is ejected from the second combustion hole 2111b. After the gas is ignited, the air in the mixture of the second combustion hole 2111b can be supplemented to the gas in the first combustion hole 2111a, so that the gas in the first combustion hole 2111a can be ignited to achieve diffusion combustion; the mixture of the second combustion hole 2111b can be directly ignited, and the second combustion hole 2111b achieves premixed combustion. Diffusion combustion and premixed combustion are achieved at the same time, which improves combustion efficiency, ensures stable combustion, and reduces the generation of exhaust gas.

[0090] In some embodiments, the third ventilation component 43 includes a first air supply component 431 , and the air supply device 40 includes a second air supply component (not shown), and the second air supply component is in communication with the first ventilation component 41 and / or the second ventilation component 42 .

[0091] It should be noted that the first gas supply member 431 is used to supply one of the combustion-supporting gas and the fuel gas (the gas inlet direction is as follows: Fig.12 The second gas supply member is used to supply the other of the combustion-supporting gas and the fuel gas (the gas inlet direction is as shown in FIG. Fig.12 (indicated by arrow R2).

[0092] In this embodiment, the first gas supply member 431 is used to supply combustion-supporting gas, for example, the first gas supply member 431 may be a fan. The second gas supply member is used to supply fuel gas.

[0093] In some embodiments, in some embodiments, the air supply device 40 also includes a control valve, which is used to control the connection or disconnection of the second air supply part and the first ventilation component 41; and / or, the control valve is used to control the connection or disconnection of the second air supply part and the second ventilation component 42; when the heat load demand is less than the preset heat load amount, the control valve connects the second air supply part and the first ventilation component 41; when the heat load demand is greater than or equal to the preset heat load amount, the control valve connects the second air supply part and the second ventilation component 42.

[0094] For example, the control valve is a three-way valve, which has a main circuit, a first branch circuit and a second branch circuit inside. The first branch circuit is connected between the main circuit and the first ventilation component 41, and the second branch circuit is connected between the main circuit and the second ventilation component 42. The main circuit is also connected to the second air supply component. When the main circuit is connected to the first branch circuit, the second air supply component is connected to the first ventilation component 41, and when the main circuit is connected to the second branch circuit, the second air supply component is connected to the second ventilation component 42.

[0095] For another example, the control valve includes a first control valve 411 and a second control valve 421, the first ventilation assembly 41 includes a first ventilation pipe 412, and the second ventilation assembly 42 includes a second ventilation pipe 422; the first ventilation pipe 412 is communicated with the first combustion hole 2111a, and the second ventilation pipe 422 is communicated with the mixing device 50;

[0096] The first control valve 411 is connected to the first ventilation pipe 412 and used to control the connection or disconnection between the first ventilation pipe 412 and the second air supply member. The second control valve 421 is connected to the second ventilation pipe 422 and used to control the connection or disconnection between the second ventilation pipe 422 and the second air supply member.

[0097] When the heat load demand is less than the preset heat load amount, the first control valve 411 connects the second air supply part and the first ventilation assembly 41 ; when the heat load demand is greater than or equal to the preset heat load amount, the second control valve 421 connects the second air supply part and the second ventilation assembly 42 .

[0098] Specifically, the third ventilation assembly 43 also includes a third ventilation pipe 432, and the third ventilation pipe 432 is also connected to the mixing device 50. It can be understood that in the embodiment where the third ventilation pipe 432 transports the combustion-supporting gas, and the first ventilation pipe 412 and the second ventilation pipe 422 transport the fuel gas: when the heat load demand is less than the preset heat load, the first control valve 411 conducts the second air supply member and the first ventilation pipe 412, and the second air supply member and the second ventilation pipe 422 are not connected, and the gas is input into the combustion device 10 through the first ventilation pipe 412, and the gas will not enter the mixing device 50 and will not mix with the air. At this time, when the heat load of the combustion system 1 is small, the diffusion combustion mode is adopted, which can achieve flame stability, and no backfire occurs at a low fire;

[0099] When the heat load demand is greater than or equal to the preset heat load amount, the second control valve 421 connects the second air supply member and the second ventilation pipe 422, and the second air supply member and the first ventilation pipe 412 are not connected, and the fuel gas is input into the mixing device 50 through the second ventilation pipe 422, and the fuel gas will be mixed with the air in the mixing device 50. At this time, when the heat load of the combustion system 1 is large, a premixed combustion method is adopted to achieve full combustion, high combustion efficiency, and less exhaust gas generation.

[0100] In some embodiments, the cooling channel 2112 is disposed around the combustion hole 2111 .

[0101] For example, a combustion cavity 114 is provided in the combustion plate 211, and the combustion cavity 114 is structured to form a cooling channel 2112, which is arranged around the combustion hole 2111. For another example, the combustion assembly 21 also includes a cooling member, and a cooling channel 2112 is formed in the cooling member, and the cooling channel 2112 in the cooling member is arranged around the combustion hole 2111.

[0102] The cooling channel 2112 is arranged around the combustion hole 2111, so that the cooling channel 2112 can quickly cool the gas in the combustion hole 2111, thereby helping to further reduce the possibility of flashback.

[0103] In some embodiments, the combustion holes 2111 are arranged in the same direction as a combustion hole group; the cooling channels 2112 are arranged alternately with the combustion holes 2111 in the combustion hole group, and / or the cooling channels 2112 are arranged alternately with the combustion hole group.

[0104] The alternating arrangement of the cooling channels 2112 and the combustion holes 2111 in the combustion hole group means that the cooling members are arranged alternately with the combustion holes 2111 along the arrangement direction of the combustion holes 2111 in the combustion hole group.

[0105] For example, the combustion holes 2111 are arranged along the length direction of the combustion plate 211 (such as Figure 4 or Figure 5 For example, the cooling channels 2112 and the combustion holes 2111 are arranged alternately along the length direction of the combustion plate 211. For another example, the combustion holes 2111 are arranged alternately along the width direction of the combustion plate 211 (eg, Figure 4 or Figure 5 Taking the arrangement of the combustion hole groups in a row (indicated by the middle arrow Y) as an example, the cooling channels 2112 and the combustion holes 2111 are alternately arranged along the width direction of the combustion plate 211.

[0106] The cooling channels 2112 and the combustion hole groups are arranged alternately, which means that the cooling channels 2112 are arranged alternately with the combustion hole groups along the arrangement direction of the combustion hole groups. For example, taking the combustion hole groups as row combustion hole groups, and at least two groups, and arranged along the width direction of the combustion plate 211 as an example, the cooling channels 2112 and the row combustion hole groups are arranged alternately along the width direction of the combustion plate 211. For another example, taking the combustion hole groups as column combustion hole groups, and at least two groups, and arranged along the length direction of the combustion plate 211 as an example, the cooling channels 2112 and the column combustion hole groups are arranged alternately along the length direction of the combustion plate 211.

[0107] Alternating arrangement can be understood as two components being arranged alternately in sequence. For example, two components are defined as the first component and the second component, and alternating arrangement of the first component and the second component means that the first component and the second component are arranged in the order of M1 first components, N1 second components, M2 first components, N2 second components, ..., or N1 second components, M1 first components, N2 second components, M2 first components, .... Wherein M1, M2, ... and N1, N2, ... are all natural numbers greater than 0, and M1, M2, ... or N1, N2, ... can be the same value or different values.

[0108] The cooling channels 2112 and the combustion holes 2111 in the combustion hole group are arranged alternately, and / or the cooling channels 2112 and the combustion hole group are arranged alternately, so that the cooling channels 2112 can fully cool the gas in the combustion holes 2111 in the combustion hole group, reducing the possibility of flashback and improving the combustion stability.

[0109] Furthermore, in some embodiments of the present application, the combustion holes 2111 are arranged as combustion hole groups along the length direction of the combustion plate 211, and the cooling channels 2112 and the combustion hole groups are arranged alternately along the width direction of the combustion plate 211; and / or the combustion holes 2111 are arranged as combustion hole groups along the width direction of the combustion plate 211, and the cooling channels 2112 and the combustion hole groups are arranged alternately along the length direction of the combustion plate 211.

[0110] For example, in the width direction of the combustion plate 211, the cooling channel 2112 and the combustion hole group can be arranged alternately in the manner of cooling channel 2112, combustion hole group, cooling channel 2112, combustion hole group..., or the cooling channel 2112 and the combustion hole group can also be arranged alternately in the manner of combustion hole group, cooling channel 2112, combustion hole group, cooling channel 2112...

[0111] Under this setting, the combustion plate 211 can not only ensure that the fuel gas and the combustion-supporting gas are evenly mixed in the first combustion mode, but also ensure that the possibility of flashback is reduced and the combustion stability is better when the combustion plate 211 is in the first combustion mode or the second combustion mode. Since the cooling channel 2112, the first combustion hole 2111a, and the second combustion hole 2111b are evenly distributed on the combustion plate 211, the cooling fluid in the cooling channel 2112 can evenly reduce the temperature of the combustion hole or the flame in the combustion hole, so that the cooling channel 2112 can fully cool the gas in the first combustion hole 2111a and the second combustion hole 2111b in the combustion hole group, and then, the temperature of the flame formed by the combustion plate 211, whether it is diffusion combustion or premixed combustion, is also reduced, and at the same time, it is avoided that the temperature of the gas in each combustion hole 211 is unevenly reduced due to the uneven temperature of the cooling fluid, and some combustion holes 211 will flash back.

[0112] In some embodiments of the present application, the combustion device 20 further includes a flame stabilizing net 212 , and the flame stabilizing net 212 covers the combustion holes 2111 of the combustion plate 211 .

[0113] Specifically, the flame-stabilizing net 212 is a multi-layer mesh structure made of metal wire. The flame-stabilizing net 212 covers the combustion holes 2111 on the combustion plate 211, which can increase the difficulty of gas output in the combustion holes 2111, so that the gas can burn directly inside the mesh of the flame-stabilizing net 212 and form a stable flame, thereby improving the stability of combustion.

[0114] The present application also provides a gas water heater, which comprises a combustion system 1 as described in any one of the above embodiments.

[0115] Specifically, the gas water heater is a water heater or a wall-mounted boiler. In addition to the combustion system 1 described above, the gas water heater also includes other components such as a housing and a control system.

[0116] The gas water heater has the effects of all the above embodiments, so they will not be described in detail here.

[0117] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0118] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A combustion system, characterized in that: The combustion system comprises: A combustion device (20), comprising a combustion assembly (21), wherein the combustion assembly (21) comprises a combustion plate (211) and a cooling channel (2112) for cooling the combustion plate (211); and A combustion chamber structure (10) comprises a combustion inner cavity (114) and a first heat exchange flow channel (12) surrounding the combustion inner cavity (114); the cooling flow channel (2112) is connected to the first heat exchange flow channel (12).

2. The combustion system according to claim 1, characterized in that: It also comprises a heat exchange device (30), wherein a second heat exchange channel is arranged in the heat exchange device (30), and the second heat exchange channel is connected to the first heat exchange channel (12).

3. The combustion system according to claim 1, characterized in that: The combustion chamber structure (10) comprises a coil (11), the inner surface of the coil (11) defines the first heat exchange flow channel (12), the coil (11) comprises a plurality of circles of tube segments (111), all of the sub-tube segments (111) are arranged along the axial direction of the combustion chamber structure (10) and are connected end to end in sequence, all of the sub-tube segments (111) define the combustion cavity (114), and two adjacent circles of the sub-tube segments (111) are sealed and connected.

4. The combustion system according to claim 1, characterized in that: The combustion chamber structure (10) comprises an inner shell (13) and an outer shell (14) covering the inner shell (13), wherein either the outer surface of the inner shell (13) or the inner surface of the outer shell (14) is recessed in a direction away from the other, and defines the first heat exchange flow channel (12) with the other, the first heat exchange flow channel (12) extends along the circumference of the inner shell (13), and the inner surface of the inner shell (13) encloses the combustion cavity (114); A partition structure (15) is arranged in the first heat exchange channel (12) and divides the first heat exchange channel (12) into at least two sub-channels (121) arranged along the width direction of the first heat exchange channel (12).

5. The combustion system according to claim 1, characterized in that: The combustion plate (211) is provided with a combustion hole (2111), and the combustion hole (2111) is independent of the cooling flow channel (2112).

6. The combustion system according to claim 5, characterized in that: The cooling flow channel (2112) is arranged around the combustion hole (2111).

7. The combustion system according to claim 5, characterized in that: The combustion holes (2111) are arranged in the same direction to form a combustion hole group; the cooling flow channels (2112) and the combustion holes (2111) in the combustion hole group are arranged alternately, and / or the cooling flow channels (2112) and the combustion hole group are arranged alternately.

8. The combustion system according to claim 7, characterized in that: The combustion holes (2111) are arranged along the length direction of the combustion plate (211) to form the combustion hole group, and the cooling flow channels (2112) and the combustion hole group are alternately arranged along the width direction of the combustion plate (211); and / or the combustion holes (2111) are arranged along the width direction of the combustion plate (211) to form the combustion hole group, and the cooling flow channels (2112) and the combustion hole group are alternately arranged along the length direction of the combustion plate (211).

9. The combustion system according to claim 5, characterized in that: The combustion device (20) further comprises a flame stabilizing net (212), wherein the flame stabilizing net (212) covers the combustion holes (2111) of the combustion plate (211).

10. A gas water heater, characterized in that: Comprising a combustion system as described in any one of claims 1 to 9 above.

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