Combustion device, combustion system and gas water heating equipment

Abstract

The invention relates to a combustion plate, a combustion system and gas water heating equipment. The combustion device comprises a combustion plate, the combustion plate comprises a first combustion hole and a second combustion hole, the combustion plate comprises a first combustion mode and / or a second combustion mode, in the first combustion mode, the first combustion hole outputs one of fuel gas and combustion-supporting gas, and the second combustion hole outputs the other of the fuel gas and the combustion-supporting gas, or in the second combustion mode, the second combustion hole outputs the other of the fuel gas and the combustion-supporting gas. In the first combustion mode, fuel gas in the first combustion holes flows into the second combustion holes and is output after being mixed with combustion-supporting gas in the second combustion holes, and in the second combustion mode, the second combustion holes output mixed gas of the fuel gas and the combustion-supporting gas. The cooling piece is connected to the combustion plate; wherein the first combustion holes and the second combustion holes are arranged in the same direction to form a combustion hole group, the cooling parts and the combustion holes in the combustion hole group are alternately arranged, and / or the cooling parts and the combustion hole group are alternately arranged. According to the combustion plate, the combustion system and the gas water heating equipment, tempering is not prone to occurring.

Description

Technical Field

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

[0002] Premixed combustion technology refers to a combustion technology that mixes gas and air in advance and burns them at one time. The combustion flame formed by premixed combustion technology has the advantages of high combustion intensity and strong propagation ability. At present, premixed combustion technology has been widely used in gas water heaters.

[0003] However, in the existing gas water heaters using premixed combustion technology, the combustion flame is prone to backfire and the combustion stability is relatively weak. Summary of the invention

[0004] In view of the above problems, according to various embodiments of the present application, a combustion plate, a combustion system and a gas water heater are provided.

[0005] A combustion device, comprising:

[0006] A combustion plate, comprising a first combustion hole and a second combustion hole, wherein the combustion plate comprises a first combustion mode and / or a second combustion mode; in the first combustion mode, the first combustion hole outputs one of a fuel gas and a combustion-supporting gas, and the second combustion hole outputs the other of the fuel gas and the combustion-supporting gas, or the fuel gas in the first combustion hole flows into the second combustion hole and is mixed with the combustion-supporting gas in the second combustion hole before being output; in the second combustion mode, the second combustion hole outputs a mixed gas of the fuel gas and the combustion-supporting gas;

[0007] A cooling member connected to the combustion plate;

[0008] Wherein, the first combustion holes and the second combustion holes are arranged in the same direction as a combustion hole group, the cooling element and the combustion holes in the combustion hole group are arranged alternately, and / or the cooling element and the combustion hole group are arranged alternately.

[0009] In some embodiments, the first combustion holes and the second combustion holes are arranged as a combustion hole group along a first direction, and the cooling elements and the combustion hole groups are arranged alternately along a second direction;

[0010] The first direction intersects the second direction.

[0011] In some embodiments, the first combustion holes and the second combustion holes in the combustion hole group are alternately arranged along the first direction.

[0012] In some of the embodiments, the combustion hole groups include at least two groups arranged at intervals along the length direction and / or width direction of the combustion plate, and at least one cooling member is arranged between each two adjacent groups of the combustion hole groups.

[0013] In some of the embodiments, the cross-sectional area of ​​the second combustion hole gradually increases along the flow direction of the gas.

[0014] In some embodiments, a cooling channel is formed in the cooling member, and the combustion device also includes a liquid inlet pipe assembly and a liquid outlet pipe assembly, the liquid inlet pipe assembly is assembled at the liquid inlet of the cooling channel, and the liquid outlet pipe assembly is assembled at the liquid outlet of the cooling channel.

[0015] A combustion system comprises a combustion device as described in any one of the above embodiments.

[0016] In some embodiments, a mixing device and an air supply device are further included, wherein the mixing device is communicated with the second combustion hole, the air supply device includes a first ventilation component, a second ventilation component and a third ventilation component, the second ventilation component and the third ventilation component are both communicated with the mixing device, and the first ventilation component is communicated with the first combustion hole;

[0017] Among them, the first ventilation assembly and the second ventilation assembly are both used to transport one of the fuel gas or the combustion-supporting gas, the third ventilation assembly is used to transport the other of the fuel gas or the combustion-supporting gas, and at least one of the first ventilation assembly and the second ventilation assembly can be conducted.

[0018] In some embodiments, the third ventilation component includes a first air supply component, and the air supply device includes a second air supply component, and the second air supply component can be connected to the first ventilation component and / or the second ventilation component.

[0019] In some embodiments, the air supply device also includes a control valve, which is used to control the connection or disconnection of the second air supply member and the first ventilation component; and / or, the control valve is used to control the connection or disconnection of the second air supply member and the second ventilation component; when the heat load demand is less than the preset heat load amount, the control valve connects the second air supply member and the first ventilation component; when the heat load demand is greater than or equal to the preset heat load amount, the control valve connects the second air supply member and the second ventilation component.

[0020] A gas water heater comprises a combustion system as described in any one of the above embodiments.

[0021] The above-mentioned combustion plate, combustion system and gas water heating equipment, the cooling elements and the combustion holes in the combustion hole group are arranged alternately, and / or the cooling elements and the combustion hole group are arranged alternately, so that the combustion plate 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 combustion plate is in the first combustion mode or the second combustion mode. Since the cooling elements, the first combustion holes and the second combustion holes are evenly distributed on the combustion plate, the cooling fluid in the cooling element can evenly reduce the temperature of the combustion holes or the flames in the combustion holes. Moreover, the cooling element can fully cool the gas in the first combustion hole and the second combustion hole in the combustion hole group, while avoiding the problem of uneven temperature reduction of the gas in each combustion hole due to uneven temperature of the cooling fluid, and flashback of some combustion holes, thereby achieving better combustion stability.

[0022] 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

[0023] 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:

[0024] Figure 1 This is a schematic diagram of the structure of the combustion device in some embodiments of the present application.

[0025] Figure 2 for Figure 1 A top view of the combustion device is shown.

[0026] Figure 3 for Figure 1 The combustion device shown is a cross-sectional view along the AA direction.

[0027] Figure 4 It is a cross-sectional view of the combustion device along the AA direction in other embodiments of the present application.

[0028] Figure 5 This is a schematic diagram of the structure of the combustion system in some embodiments of the present application.

[0029] Figure Number:

[0030] 1. Combustion system;

[0031] 10. Combustion device; 11. Combustion plate; 111. Combustion hole; 111a. First combustion hole; 111b. Second combustion hole; 12. Cooling element; 121. Cooling channel; 13. Liquid inlet pipeline assembly; 131. Liquid inlet manifold; 132. Liquid inlet branch pipe; 14. Liquid outlet pipeline assembly; 141. Liquid outlet manifold; 142. Liquid outlet branch pipe;

[0032] 20. Mixing device;

[0033] 30. Air supply device; 31. First ventilation assembly; 311. First control valve; 312. First ventilation pipe; 32. Second ventilation assembly; 321. Second control valve; 322. Second ventilation pipe; 33. Third ventilation assembly; 331. First air supply member; 332. Third ventilation pipe. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Please also read Figure 1 and Figure 2 The present application provides a combustion device 10, which includes a combustion plate 11 and a cooling member 12. The combustion plate 11 includes a first combustion hole 111a and a second combustion hole 111b, and the combustion plate 11 includes a first combustion mode and / or a second combustion mode; in the first combustion mode, the first combustion hole 111a outputs one of the fuel gas and the combustion-supporting gas, and the second combustion hole 111b outputs the other of the fuel gas and the combustion-supporting gas, or the fuel gas in the first combustion hole 111a flows into the second combustion hole 111b and is mixed with the combustion-supporting gas in the second combustion hole 111b and then output; in the second combustion mode, the second combustion hole 111b outputs a mixed gas of the fuel gas and the combustion-supporting gas.

[0041] The cooling element 12 is connected to the combustion plate 11 .

[0042] The first combustion holes 111a and the second combustion holes 111b are arranged in the same direction as a combustion hole group, the cooling element 12 and the combustion holes 111 in the combustion hole group are arranged alternately, and / or the cooling element 12 and the combustion hole group are arranged alternately.

[0043] Please also read Figure 3 In some embodiments, the first combustion hole 111a and the second combustion hole 111b are independently arranged and are directly connected to the outside. Direct connection means that the connection is not carried out through an intermediate connecting element. In this embodiment, when the first combustion mode is adopted, the fuel gas is output from the first combustion hole 111a, and the combustion-supporting gas is output from the second combustion hole 111b. At this time, the combustion plate 11 is in diffusion combustion, ensuring the flame stability during diffusion combustion; when the second combustion mode is adopted, the first combustion hole 111a does not spray gas, and the second combustion hole 111b outputs a mixed gas of fuel gas and combustion-supporting gas. At this time, the combustion plate 11 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.

[0044] Please also read Figure 4 In some embodiments, there are at least two second combustion holes 111b, and a first combustion hole 111a is disposed between every two adjacent second combustion holes 111b. The first combustion hole 111a has two branch gas outlets, and each branch gas outlet is connected to a corresponding second combustion hole 111b. In this embodiment, the first combustion hole 111a is formed in the combustion plate 11, and the first combustion hole 111a is connected to the outside through the two second combustion holes 111b connected thereto.

[0045] In this embodiment, when the first combustion mode is adopted, the fuel gas in each first combustion hole 111a can flow into the corresponding second combustion hole 111b through the branch outlet, and be mixed with the combustion-supporting gas in the corresponding second combustion hole 111b and then ejected from the second combustion hole 111b. In this way, premixing of gases during diffusion combustion is achieved, thereby improving combustion efficiency. When the second combustion mode is adopted, the first combustion hole 111a does not spray gas, and the mixed gas of fuel gas and combustion-supporting gas is output from the second combustion hole 111b, which can shorten the flame length during premixed combustion, achieve stable combustion, and help improve combustion efficiency.

[0046] Of course, in some other embodiments, in the same combustion hole group, the first combustion holes 111a and the second combustion holes 111b may also be arranged non-alternatingly, for example, the first combustion holes 111a and the second combustion holes 111b are the same in number and correspond one to one, each first combustion hole 111a is connected to the corresponding second combustion hole 111b, and in the first combustion mode, the fuel gas in each first combustion hole 111a flows into the corresponding second combustion hole 111b, and is mixed with the combustion-supporting gas in the corresponding second combustion hole 111b and then ejected from the second combustion hole 111b. When the first combustion mode is used, the combustion plate 11 is diffuse combustion, ensuring that the flame is stable during diffusion combustion; when the second combustion mode is used, the first combustion hole 111a does not spray gas, and the second combustion hole 111b outputs the mixed gas of fuel gas and combustion-supporting gas. At this time, the combustion plate 11 is 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 will not easily cause backfire; when the heat load demand is large, turning on the second combustion mode can effectively reduce the generation of exhaust gas.

[0047] Optionally, the fuel gas is fuel gas, and the combustion-supporting gas is air and / or oxygen.

[0048] The above-mentioned combustion plate 11 has a first combustion hole 111a and a second combustion hole 111b. The same combustion plate 11 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.

[0049] The first combustion holes 111a and the second combustion holes 111b are arranged in the same direction to form a combustion hole group. The direction may be the length direction of the combustion plate 11 (eg Figure 1 The direction indicated by the X arrow), width direction (such as Figure 1 The direction indicated by the Y arrow in the figure), or other directions intersecting both the length direction and the width direction. The first combustion holes 111a and the second combustion holes 111b are arranged along the length direction of the combustion plate 11 to form a combustion hole group, and the first combustion holes 111a and the second combustion holes 111b are arranged along the width direction of the combustion plate 11 to form a combustion hole group.

[0050] 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.

[0051] For example, refer to Figure 1 The first combustion holes 111a and the second combustion holes 111b are alternately arranged along the length direction of the combustion plate 11 to form a row of combustion holes. From left to right along the length direction of the combustion plate 11, the first one is the second combustion hole 111b, the second one is the first combustion hole 111a, the third one is the second combustion hole 111b, and the fourth one is the first combustion hole 111a....

[0052] For example, refer to Figure 2 The first combustion holes 111a and the second combustion holes 111b are alternately arranged along the width direction of the combustion plate 11 to form a column of combustion holes. From top to bottom along the width direction of the combustion plate 11, the first one is the second combustion hole 111b, the second one is the first combustion hole 111a, the third one is the second combustion hole 111b, and the fourth one is the first combustion hole 111a.

[0053] The cooling element 12 is a tube row structure, which can be a single row or multiple rows. Single row means that the cooling element 12 includes a single cooling pipe, and multiple rows means that the cooling element 12 includes multiple cooling pipes arranged in parallel. The inner wall of each cooling pipe is surrounded to form a cooling channel 121. The cooling fluid flows in the cooling channel 121 and can absorb the heat of the combustion plate 11 to cool the combustion plate 11. The cross-sectional shape of each cooling pipe can be circular, square or other shapes. Here, the pipe diameter and wall thickness of the cooling element 12 are not specifically limited.

[0054] The cooling member 12 is alternately arranged with the combustion holes 111 in the combustion hole group, which means that the cooling member 12 is alternately arranged with the combustion holes 111 along the arrangement direction of the combustion holes 111 in the combustion hole group. For example, taking the first combustion holes 111a and the second combustion holes 111b being alternately arranged along the length direction of the combustion plate 11 to form a row combustion hole group as an example, the cooling member 12 is alternately arranged with the first combustion holes 111a in the row combustion hole group in the length direction of the combustion plate 11, and the cooling member 12 is alternately arranged with the second combustion holes 111b in the row combustion hole group in the length direction of the combustion plate 11.

[0055] The cooling member 12 and the combustion hole group are arranged alternately, which means that the cooling member 12 is arranged alternately with the combustion hole group along the arrangement direction of the combustion hole group. For example, taking the combustion hole group as a row combustion hole group, and at least two groups, all of which are arranged along the width direction of the combustion plate 11 as an example, the cooling member 12 and the row combustion hole group are arranged alternately along the width direction of the combustion plate 11. For another example, taking the combustion hole group as a column combustion hole group, and at least two groups, all of which are arranged along the length direction of the combustion plate 11 as an example, the cooling member 12 and the column combustion hole group are arranged alternately along the length direction of the combustion plate 11.

[0056] The cooling element 12 and the combustion holes 111 in the combustion hole group are arranged alternately, and / or the cooling element 12 and the combustion hole group are arranged alternately, so that the combustion plate 11 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 combustion plate 11 is in the first combustion mode or the second combustion mode. Since the cooling element 12, the first combustion hole 111a, and the second combustion hole 111b are evenly distributed on the combustion plate 11, the cooling fluid in the cooling element 12 can evenly reduce the combustion hole or the flame temperature in the combustion hole, and the cooling element 12 can fully cool the gas in the first combustion hole 111a and the second combustion hole 111b in the combustion hole group, while avoiding the problem of uneven temperature reduction of the gas in each combustion hole due to uneven temperature of the cooling fluid, and flashback of some combustion holes, thereby achieving better combustion stability.

[0057] It is understandable that 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 possibility of flashback is reduced and the combustion stability is better.

[0058] Furthermore, in some embodiments of the present application, the first combustion holes 111a and the second combustion holes 111b are arranged as a combustion hole group along the first direction, and the cooling member 12 and the combustion hole group are alternately arranged along the second direction; the first direction intersects with the second direction.

[0059] The first direction and the second direction can be any of the length direction, width direction, and any direction in a plane where the length direction and the width direction intersect and intersect both the length direction and the width direction of the combustion plate 11, and the first direction intersects the second direction. For ease of description, the following embodiments are described by taking the first direction as the length direction of the combustion plate 11 and the second direction as the width direction of the combustion plate 11 as an example.

[0060] For example, in the width direction of the combustion plate 11, the cooling member 12 and the combustion hole group can be arranged alternately in the manner of cooling member 12, combustion hole group, cooling member 12, combustion hole group..., or the cooling member 12 and the combustion hole group can be arranged alternately in the manner of combustion hole group, cooling member 12, combustion hole group, cooling member 12...

[0061] Under this arrangement, the gas in the combustion holes 111 in each row of combustion hole groups can be cooled by the cooling member 12 adjacent thereto, thereby helping to reduce the possibility of flashback.

[0062] In some embodiments of the present application, the first combustion holes 111 a and the second combustion holes 111 b in the combustion hole group are alternately arranged along the first direction.

[0063] In this way, the first combustion holes 111a and the second combustion holes 111b are arranged alternately along the first direction. When the first combustion mode is turned on, the fuel gas ejected from the first combustion holes 111a can quickly contact the combustion-supporting gas ejected from the adjacent second combustion holes 111b, making the flame more stable during diffusion combustion and avoiding the flame separation phenomenon. Figure 1 Furthermore, in some embodiments of the present application, the combustion hole groups include at least two groups arranged at intervals along the length direction and / or width direction of the combustion plate 11, and at least one cooling member 12 is arranged between each two adjacent groups of combustion hole groups.

[0064] For example, the combustion hole groups include at least two groups arranged at intervals along the width direction of the combustion plate 11, and at least one cooling member 12 is arranged between each two adjacent groups of combustion hole groups. In this embodiment, the cooling member 12 between each two adjacent groups of combustion hole groups can be fully utilized to cool down each two adjacent groups of combustion hole groups, and in the case of fewer cooling members 12, a better cooling and anti-flashback effect is also achieved.

[0065] Please also read Figure 3 and Figure 4 In some embodiments, along the flow direction of the gas, the cross-sectional area of ​​the second combustion hole 111b gradually increases. The cross-sectional area of ​​the second combustion hole 111b is the cross-sectional area of ​​the second combustion hole 111b perpendicular to the thickness direction of the combustion plate 11 (e.g. Figure 1 The area of ​​the cross section in the direction indicated by the Z arrow.

[0066] In the embodiment where the first combustion hole 111a and the second combustion hole 111b are independently arranged and are directly connected to the outside, the first combustion hole 111a and the second combustion hole 111b are arranged along the thickness direction of the combustion plate 11 (such as Figure 1 The direction indicated by the arrow Z in the figure penetrates the combustion plate 11, and the flow direction of the gas in the first combustion hole 111a is consistent with that in the second combustion hole 111b. Figure 3 For example, the flow direction of the gas in the first combustion hole 111a and the second combustion hole 111b is both in the vertical upward Z direction.

[0067] In an embodiment where the first combustion hole 111a has two branch gas outlet ends, each branch gas outlet end is connected to a corresponding second combustion hole 111b, the second combustion holes 111b penetrate the combustion plate 11 along the thickness direction of the combustion plate 11, and the first combustion hole 111a extends approximately along the length direction or the width direction of the combustion plate 11, and the flow direction of the gas in the first combustion hole 111a is perpendicular or approximately perpendicular to the flow direction of the gas in the second combustion hole 111b.

[0068] by Figure 4 For example, the flow direction of the gas in the first combustion hole 111a is substantially the horizontal M direction, and the flow direction of the gas in the second combustion hole 111b is substantially the vertical Z direction. The cross-sectional area of ​​the second combustion hole 111b may vary linearly or nonlinearly.

[0069] It can be understood that when the first combustion mode is turned on and gas is ejected from the second combustion hole 111b, the cross-sectional area of ​​the second combustion hole 111b gradually increases and the flow rate of the gas gradually decreases, so that the flame is not easily blown away by the airflow during diffusion combustion, thereby avoiding the flame separation phenomenon; in addition, the flow rate of the gas ejected from the second combustion hole 111b decreases, and the contact time between the gas ejected from the second combustion hole 111b and the gas ejected from the first combustion hole 111a increases, or the contact time between the fuel gas flowing from the first combustion hole 111a into the second combustion hole 111b and the combustion-supporting gas in the second combustion hole 111a increases, so that the combustion is more complete and less exhaust gas is generated.

[0070] When the second combustion mode (i.e., premixed combustion) is turned on and a mixture of fuel gas and combustion-supporting gas is outputted from the second combustion hole 111b, the flow rate of the mixture gradually decreases due to the gradual increase in the cross-sectional area of ​​the second combustion hole 111b, thereby avoiding the flame separation phenomenon; in addition, in an embodiment in which the first combustion hole 111a has two branch gas outlet ends, each branch gas outlet end is connected to a corresponding second combustion hole 111b, and the mixture is fully mixed before combustion and then ejected from the second combustion hole 111b, thereby achieving stable combustion and effectively shortening the length of the combustion flame.

[0071] In this embodiment, the first combustion hole 111a is or is approximately cylindrical, and the second combustion hole 111b is in a conical frustum shape. In other embodiments, the first combustion hole 111a and the second combustion hole 111b may also be in other shapes.

[0072] Please refer again Figure 3 In some embodiments, a cooling channel 121 is formed in the cooling member 12, and the combustion device 10 also includes a liquid inlet pipe assembly 13 and a liquid outlet pipe assembly 14, the liquid inlet pipe assembly 13 is assembled at the liquid inlet of the cooling channel 121, and the liquid outlet pipe assembly 14 is assembled at the liquid outlet of the cooling channel 121.

[0073] The liquid inlet pipe assembly 13 is used to input cooling fluid into the cooling channel 121, and the liquid outlet pipe assembly 14 is used to output the cooling fluid in the cooling channel 121, so that the cooling channel 121 can always maintain low-temperature cooling fluid, thereby helping to achieve a better cooling effect.

[0074] The inner wall of each cooling pipe in the cooling element 12 is surrounded to form a cooling channel 121. Taking the cooling element 12 as an example including a single cooling pipe, each cooling element 12 includes a cooling channel 121.

[0075] like Figure 3 As shown, in some embodiments, the liquid inlet pipe assembly 13 includes a liquid inlet manifold 131 and a plurality of liquid inlet branch pipes 132, all of the liquid inlet branch pipes 132 correspond to the cooling channels 121 of all the cooling elements 12, each of the liquid inlet branch pipes 132 is assembled at the liquid inlet of the corresponding cooling channel 121, and is connected between the corresponding cooling channel 121 and the liquid inlet manifold 131. The liquid outlet pipe assembly 14 includes a liquid outlet manifold 141 and a plurality of liquid outlet branch pipes 142, all of the liquid outlet branch pipes 142 correspond to the cooling channels 121 of all the cooling elements 12, each of the liquid outlet branch pipes 142 is assembled at the liquid outlet of the corresponding cooling channel 121, and is connected between the corresponding cooling channel 121 and the liquid outlet manifold 141.

[0076] The cross-sectional shapes of the liquid inlet manifold 131 , the liquid inlet branch pipes 132 , the liquid outlet manifold 141 and the liquid outlet branch pipes 142 may be circular, square or other shapes.

[0077] In this embodiment, the cooling fluid flows in through the inlet manifold 131 (the external cooling fluid flows in through the Figure 5 The liquid flows into the liquid inlet manifold 131 in the direction indicated by the arrow R1 in the figure), and is branched into each cooling channel 121 through each liquid inlet branch pipe 132, and then converges to the liquid outlet manifold 141 through each liquid outlet branch pipe 142 for output.

[0078] See also Figure 1 , and also see Figure 5 The present application also provides a combustion system 1, which includes a combustion device 10 as described in any one of the above embodiments. The combustion system 1 in the present application has the effects of any one of the above embodiments, so it will not be repeated here.

[0079] In some embodiments, the combustion system 1 further includes a mixing device 20 and an air supply device 30, the mixing device 20 is in communication with the second combustion hole 111b, the air supply device 30 includes a first ventilation component 31, a second ventilation component 32 and a third ventilation component 33, the second ventilation component 32 and the third ventilation component 33 are both in communication with the mixing device 20, and the first ventilation component 31 is in communication with the first combustion hole 111a;

[0080] Among them, the first ventilation assembly 31 and the second ventilation assembly 32 are both used to transport one of the fuel gas or the combustion-supporting gas, and the third ventilation assembly 33 is used to transport the other of the fuel gas or the combustion-supporting gas. At least one of the first ventilation assembly 31 and the second ventilation assembly 32 can be conducted.

[0081] In actual use, the user can select to connect at least one of the first ventilation assembly 31 and the second ventilation assembly 32 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.

[0082] For example, in an embodiment where the third ventilation assembly 33 delivers a combustion-supporting gas, and the combustion-supporting gas is air, and the first ventilation assembly 31 and the second ventilation assembly 32 deliver fuel gas:

[0083] When the heat load is small, the first combustion mode is turned on, and only the first ventilation component 31 is turned on, air flows into the mixing device 20 and is ejected from the second combustion hole 111b connected to the mixing device 20, and the gas is ejected from the first combustion hole 111a connected to the first ventilation component 31. After the gas and air are mixed in the combustion device 10, they are ignited and burned by the ignition needle, and flame-stable combustion can be achieved;

[0084] When the heat load is large, the second combustion mode is turned on, and only the second ventilation assembly 32 is turned on, air flows into the mixing device 20, and the gas flows into the inside of the mixing device 20, the air and the gas are mixed in the mixing device 20, and are ejected from the second combustion hole 111b connected to the mixing device 20, and the mixed gas is ignited and burned by the ignition needle, which can achieve full combustion, high combustion efficiency, and less exhaust gas.

[0085] When the first combustion mode and the second combustion mode are turned on at the same time, the first ventilation assembly 31 and the second ventilation assembly 32 are turned on at the same time, the gas is ejected from the first combustion hole 111a, and the mixed gas of the gas and air is ejected from the second combustion hole 111b. After the gas is ignited, the air in the mixed gas of the second combustion hole 111b can be supplemented to the gas of the first combustion hole 111a, so that the gas of the first combustion hole 111a can be ignited to achieve diffusion combustion; the mixed gas of the second combustion hole 111b can be directly ignited, and the second combustion hole 111b 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.

[0086] In some embodiments, the third ventilation component 33 includes a first air supply component 331 , and the air supply device 30 includes a second air supply component (not shown), and the second air supply component is in communication with the first ventilation component 31 and / or the second ventilation component 32 .

[0087] It should be noted that the first gas supply member 331 is used to supply one of the combustion-supporting gas and the fuel gas (the gas intake direction is as follows: Figure 5 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. Figure 5 (indicated by arrow R2).

[0088] In this embodiment, the first gas supply member 331 is used to supply combustion-supporting gas, for example, the first gas supply member 331 may be a fan. The second gas supply member is used to supply fuel gas.

[0089] In some embodiments, the air supply device 30 also includes a control valve, which is used to control the connection or disconnection between the second air supply member and the first ventilation component 31; and / or, the control valve is used to control the connection or disconnection between the second air supply member and the second ventilation component 32; when the heat load demand is less than the preset heat load amount, the control valve connects the second air supply member and the first ventilation component 31; when the heat load demand is greater than or equal to the preset heat load amount, the control valve connects the second air supply member and the second ventilation component 32.

[0090] 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 31, and the second branch circuit is connected between the main circuit and the second ventilation component 32. 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 31, and when the main circuit is connected to the second branch circuit, the second air supply component is connected to the second ventilation component 32.

[0091] For another example, the control valve includes a first control valve 311 and a second control valve 321, the first ventilation assembly 31 includes a first ventilation pipe 312, and the second ventilation assembly 32 includes a second ventilation pipe 322; the first ventilation pipe 312 is communicated with the first combustion hole 111a, and the second ventilation pipe 322 is communicated with the mixing device 20;

[0092] The first control valve 311 is connected to the first ventilation pipe 312 and used to control the connection or disconnection between the first ventilation pipe 312 and the second air supply member. The second control valve 321 is connected to the second ventilation pipe 322 and used to control the connection or disconnection between the second ventilation pipe 322 and the second air supply member.

[0093] When the heat load demand is less than the preset heat load amount, the first control valve 311 connects the second air supply member and the first ventilation pipe 312 ; when the heat load demand is greater than or equal to the preset heat load amount, the second control valve 321 connects the second air supply member and the second ventilation pipe 322 .

[0094] Specifically, the third ventilation assembly 33 further includes a third ventilation pipe 332 , and the third ventilation pipe 332 is also in communication with the mixing device 20 .

[0095] It can be understood that in the embodiment where the third vent pipe 332 delivers combustion-supporting gas, and the first vent pipe 312 and the second vent pipe 322 deliver fuel gas: when the heat load demand is less than the preset heat load, the first control valve 311 conducts the second gas supply member and the first vent pipe 312, and the second gas supply member and the second vent pipe 322 are not connected, and the gas is input into the combustion device 10 through the first vent pipe 312, and the gas does not enter the mixing device 20 and does not mix with the air. At this time, when the heat load of the combustion system 1 is small, the diffusion combustion method is adopted to achieve flame stability, and no backfire occurs at a low fire;

[0096] When the heat load demand is greater than or equal to the preset heat load amount, the second control valve 321 connects the second air supply member and the second ventilation pipe 322, and the second air supply member and the first ventilation pipe 312 are not connected, and the fuel gas is input into the mixing device 20 through the second ventilation pipe 322, and the fuel gas will be mixed with the air in the mixing device 20. 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.

[0097] It should be noted that the hot water outlet temperature T is set by the user. 设定 , and the controller obtains the inlet water temperature T 进水 , water inlet flow q. Heat load demand Q = k·C 水 ·(T 设定 -T 进水 )·q, where k is the correction factor, Cwater is the specific heat capacity of water, (T 设定 -T 进水) is the target temperature difference, and qwater flow is the water inlet flow.

[0098] The preset amount of heat load is preferably the total heat load of the combustion system or gas water heater x preset percentage, the total heat load of the combustion system or gas water heater is the total heat load input or output of the combustion system or gas water heater, wherein the total heat load input of the combustion system or gas water heater = gas calorific value * gas consumption / t, t is the time required to input the corresponding gas consumption, the total heat load output of the combustion system or gas water heater = k·C water·25℃·q standard, wherein k is the correction coefficient, q standard is the water inlet flow rate under the standard test conditions of the corresponding combustion system or gas equipment, such as a 16L gas water heater, the corresponding water inlet flow rate q standard under the standard test conditions is 16L / min.

[0099] In this embodiment, the preset percentage is preferably 10%-30%, that is, the preset amount of heat load is preferably any value in the range of total heat load of the combustion system or gas water heater * 10% to total heat load of the combustion system or gas water heater * 30%, and the preset amount of heat load is preferably total heat load of the combustion system or gas water heater * 20%. In other embodiments, the preset amount of heat load can be any other value. The present application also provides a gas water heater, which includes a combustion system 1 as described in any of the above embodiments.

[0100] Specifically, the gas water heater is a water heater or a wall-mounted boiler. In addition to the combustion system 1, the gas water heater also includes other components such as a housing and a control system. It is worth mentioning that the controller is a component of the control system.

[0101] The gas water heater has the effects of all the above embodiments, so they will not be described in detail here.

[0102] 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.

[0103] 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 device, characterized in that: include: A combustion plate (11), comprising a first combustion hole (111a) and a second combustion hole (111b), wherein the combustion plate (111) comprises a first combustion mode and / or a second combustion mode; in the first combustion mode, the first combustion hole (111a) outputs one of a fuel gas and a combustion-supporting gas, and the second combustion hole (111b) outputs the other of the fuel gas and the combustion-supporting gas, or the fuel gas in the first combustion hole (111a) flows into the second combustion hole (111b) and is mixed with the combustion-supporting gas in the second combustion hole (111b) and then output; in the second combustion mode, the second combustion hole (111b) outputs a mixture of the fuel gas and the combustion-supporting gas; A cooling element (12) connected to the combustion plate (11); The first combustion hole (111a) and the second combustion hole (111b) are arranged in the same direction to form a combustion hole group, the cooling element (12) and the combustion holes (111) in the combustion hole group are arranged alternately, and / or the cooling element (12) and the combustion hole group are arranged alternately.

2. The combustion device according to claim 1, characterized in that: The first combustion holes (111a) and the second combustion holes (111b) are arranged in a first direction to form a combustion hole group, and the cooling element (12) and the combustion hole group are arranged alternately in a second direction; The first direction intersects the second direction.

3. The combustion device according to claim 2, characterized in that: The first combustion holes (111a) and the second combustion holes (111b) in the combustion hole group are arranged alternately along the first direction.

4. The combustion device according to any one of claims 1 to 3, characterized in that: The combustion hole groups include at least two groups spaced apart along the length direction and / or width direction of the combustion plate (11), and at least one cooling member (12) is arranged between each two adjacent groups of the combustion hole groups.

5. The combustion device according to claim 1, characterized in that: Along the flow direction of the gas, the cross-sectional area of ​​the second combustion hole (111b) gradually increases.

6. The combustion device according to claim 1, characterized in that: A cooling channel (121) is formed in the cooling element (12), and the combustion device further comprises a liquid inlet pipe assembly (13) and a liquid outlet pipe assembly (14), wherein the liquid inlet pipe assembly (13) is mounted at the liquid inlet of the cooling channel (121), and the liquid outlet pipe assembly (14) is mounted at the liquid outlet of the cooling channel (121).

7. A combustion system, characterized in that: It comprises a combustion device as described in any one of claims 1 to 6 above.

8. The combustion system according to claim 7, characterized in that: The invention also comprises a mixing device (20) and an air supply device (30), wherein the mixing device (20) is in communication with the second combustion hole (111b), and the air supply device (30) comprises a first ventilation component (31), a second ventilation component (32) and a third ventilation component (33), wherein the second ventilation component (32) and the third ventilation component (33) are both in communication with the mixing device (20), and the first ventilation component (31) is in communication with the first combustion hole (111a); The first ventilation assembly (31) and the second ventilation assembly (32) are both used to transport one of the fuel gas or the combustion-supporting gas, and the third ventilation assembly (33) is used to transport the other of the fuel gas or the combustion-supporting gas. At least one of the first ventilation assembly (31) and the second ventilation assembly (32) can be conducted.

9. The combustion system according to claim 8, characterized in that: The third ventilation component (33) comprises a first air supply component (331), and the air supply device (30) comprises a second air supply component, wherein the second air supply component can be in communication with the first ventilation component (31) and / or the second ventilation component (32).

10. The combustion system according to claim 9, characterized in that: The air supply device (30) further comprises a control valve, the control valve being used to control the connection or disconnection between the second air supply component and the first ventilation component (31); and / or the control valve being used to control the connection or disconnection between the second air supply component and the second ventilation component (32); when the heat load demand is less than a preset heat load amount, the control valve connects the second air supply component and the first ventilation component (31); when the heat load demand is greater than or equal to the preset heat load amount, the control valve connects the second air supply component and the second ventilation component (32).

11. A gas water heater, characterized in that: Comprising a combustion system as claimed in any one of claims 7 to 10 above.

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