Combustion plate, combustion device, combustion system and gas equipment

Abstract

The invention relates to a combustion plate, a combustion device, a combustion system and gas equipment, the combustion plate comprises a first combustion hole and a second combustion hole, the gas inlet end of the second combustion hole and the gas inlet end of the first combustion hole are independently arranged, and the gas outlet end of the first combustion hole communicates with the gas outlet end of the second combustion hole and does not communicate with the outside. The combustion device comprises the combustion plate, a first combustion area and a second combustion area, the first combustion area comprises at least two first combustion holes, and the second combustion area comprises at least two second combustion holes. The combustion system comprises the combustion device. The gas equipment comprises the combustion system. According to the combustion plate, the combustion device, the combustion system and the fuel gas equipment, the requirements of different combustion modes can be met at the same time; and when the heat load demand quantity is small, the first combustion mode is started, gas premixing during diffusion combustion can be achieved, and the combustion efficiency is improved.

Description

Technical Field

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

[0002] Fully premixed combustion technology has been widely used in gas heating furnaces and gas water heaters. However, in existing fully premixed gas water heaters, the combustion flame is unstable after the power of the combustion system is adjusted, and the mixing ratio of air and gas cannot meet the use requirements well, and cannot adapt to the heat load requirements of multiple working conditions. Summary of the invention

[0003] Based on this, it is necessary to provide a combustion plate, a combustion device, a combustion system and a gas equipment to address the problem that the existing combustion system cannot adapt to the heat load requirements of multiple working conditions.

[0004] A combustion plate comprises a first combustion hole and a second combustion hole, wherein an air inlet end of the second combustion hole is independently arranged from an air inlet end of the first combustion hole, and an air outlet end of the first combustion hole is connected to an air outlet end of the second combustion hole and is not connected to the outside; wherein, the combustion plate has a first combustion mode and / or a second combustion mode, wherein in the first combustion mode, the fuel gas outputted from the first combustion hole flows into the second combustion hole and is mixed with the combustion-supporting gas in the second combustion hole and is then outputted; and in the second combustion mode, a mixture of the fuel gas and the combustion-supporting gas is outputted from the second combustion hole.

[0005] The above-mentioned combustion plate has a first combustion hole and a second combustion hole, and the same combustion plate can meet the needs of different combustion modes at the same time; the outlet end of the first combustion hole is connected to the outlet end of the second combustion hole and is not connected to the outside world. When the heat load demand is small, the first combustion mode is turned on to achieve premixing of the gas during diffusion combustion, thereby improving the combustion efficiency; when the heat load demand is large, the second combustion mode is turned on to effectively reduce the generation of exhaust gas.

[0006] In one of the embodiments, the cross-sectional area of ​​the second combustion hole gradually increases along the flow direction of the gas.

[0007] In one of the embodiments, the cross-sectional areas of the first combustion holes are equal along the flow direction of the gas.

[0008] In one embodiment, the number of the first combustion holes and the number of the second combustion holes are at least two, and the first combustion holes and the second combustion holes are alternately arranged along the length direction and / or the width direction of the combustion plate.

[0009] In one embodiment, one first combustion hole is provided between every two adjacent second combustion holes, and the gas outlet end of the first combustion hole has two branch channels, and each branch channel is connected to a corresponding second combustion hole.

[0010] In one embodiment, the cross-sectional areas of the two branch channels are equal.

[0011] A combustion device comprises the above-mentioned combustion plate, a first combustion zone and a second combustion zone, wherein the first combustion zone comprises at least two first combustion holes, and the second combustion zone comprises at least two second combustion holes.

[0012] In the above-mentioned combustion device, the same combustion plate can meet the needs of different combustion modes at the same time; the outlet end of the second combustion hole is connected to the outlet end of the first combustion hole. When the heat load demand is small, the first combustion mode is turned on to achieve premixing of the gas during diffusion combustion, thereby improving the combustion efficiency; when the heat load demand is large, the second combustion mode is turned on to effectively reduce the generation of exhaust gas.

[0013] In one of the embodiments, the combustion device further comprises a cooling element, wherein the cooling element is connected to the combustion plate.

[0014] A combustion system comprises the above combustion device.

[0015] In the above-mentioned combustion system, the combustion device can simultaneously meet the needs of different combustion modes; when the heat load demand is small, turning on the first combustion mode can achieve premixing of gases during diffusion combustion, thereby improving combustion efficiency; when the heat load demand is large, turning on the second combustion mode can effectively reduce exhaust gas generation.

[0016] In one embodiment, it also includes a mixing device and an air supply device, the mixing device is connected to the second combustion zone, the air supply device includes a first air intake assembly, a second air intake assembly and a third air intake assembly, the second air intake assembly and the third air intake assembly are both connected to the mixing device, and the first air intake assembly is connected to the first combustion zone; wherein the first air intake assembly and the second air intake assembly are both used to transport one of the fuel gas or the combustion-supporting gas, the third air intake assembly is used to transport the other of the fuel gas or the combustion-supporting gas, and at least one of the first air intake assembly and the second air intake assembly can be connected.

[0017] In one embodiment, the combustion device includes a combustion shell, and the mixing device includes a first mixer arranged outside the combustion shell and a second mixer arranged inside the combustion shell, the outlet end of the second mixer is connected to the second combustion hole, the inlet end of the second mixer is connected to the outlet end of the first mixer, the second inlet assembly and the third inlet assembly are both connected to the inlet end of the first mixer, and the first mixer is a Venturi structure.

[0018] In one embodiment, the third air intake component includes a first air supply component, the air supply device includes a second air supply component, and the second air supply component is connected to the first air intake component and / or the second air intake component.

[0019] In one embodiment, the air supply device also includes a control valve arranged on the second air supply member, and the control valve is used to control the connection or blocking of the second air supply member and the first air intake component and / or the second air intake 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 air intake 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 air intake component.

[0020] In one embodiment, the first air intake component includes a first air intake member and a distribution unit, one end of the first air intake member is connected to the second air supply member, and the other end of the first air intake member is connected to one end of the distribution unit, and the other end of the distribution unit is connected to the first combustion hole.

[0021] In one embodiment, the distribution unit includes a first distribution member and a second distribution member, one end of the first distribution member is connected to the first air intake member, the other end of the first distribution member is connected to one end of the second distribution member, and the other end of the second distribution member is connected to the first combustion zone.

[0022] In one embodiment, the first distribution member is disposed outside the combustion housing, and the second distribution member is disposed inside the combustion housing.

[0023] In one embodiment, the second distribution member includes a diverter and a connecting member, one end of the connecting member is connected to the first combustion hole, and the other end of the connecting member is connected to one end of the diverter, and the other end of the diverter is connected to the first distribution member.

[0024] In one embodiment, the first combustion hole and the second combustion hole are distributed in the same direction to form a sub-combustion zone, and the sub-combustion zone is arranged downstream of the diverter, and the number of the diverter corresponds to the number of the sub-combustion zones.

[0025] In one embodiment, the first combustion hole forms a sub-combustion zone, and the second combustion hole forms another sub-combustion zone. The sub-combustion zone formed by the first combustion hole and the sub-combustion zone formed by the second combustion hole are arranged alternately, and the sub-combustion zone is arranged downstream of the diverter. The number of the diverters corresponds one-to-one to the number of the sub-combustion zones formed by the first combustion holes.

[0026] In one of the embodiments, each of the flow dividers is connected to at least two of the connecting members, and the number of the connecting members corresponds one-to-one to the number of the first combustion holes connected to the corresponding flow dividers.

[0027] A gas-burning device comprises the above-mentioned combustion system.

[0028] The combustion system of the above-mentioned gas equipment 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 achieve premixing of gas during diffusion combustion, thereby improving combustion efficiency; when the heat load demand is large, turning on the second combustion mode can effectively reduce exhaust gas generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of a combustion system in one embodiment.

[0030] Figure 2 for Figure 1 Schematic diagram of the mixing device in the combustion system shown.

[0031] Figure 3 for Figure 1 Schematic diagram of the second mixer and distribution unit in the combustion system shown.

[0032] Figure 4 for Figure 3 A cross-sectional view of the second mixer and distribution unit is shown.

[0033] Reference numerals:

[0034] 100, combustion device; 110, combustion plate; 101, first combustion hole; 102, second combustion hole; 103, branch channel; 120, cooling element; 130, ignition needle; 200, air supply device; 201, first air inlet; 202, second air inlet assembly; 210, first air supply; 211, air inlet; 212, air outlet; 220, control valve; 400, distribution unit; 410, first distribution element; 420 , second distribution member; 421, diverter member; 422, connecting member; 300, mixing device; 310, first mixer; 311, first air inlet end; 312, second air inlet end; 313, air outlet end; 320, second mixer; 321, mixing shell; 321a, bottom plate; 321b, first side plate; 321c, second side plate; 322, gas chamber; 322a, through hole; 323, combustion chamber; 324, perspective window. DETAILED DESCRIPTION

[0035] 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.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, the terms "initial", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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 specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a 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. A first feature being “below”, “below”, and “below” a 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.

[0040] It should be noted that when 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. When 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. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0041] Please refer to Figure 1 In one embodiment, the combustion plate 110 includes a first combustion hole 101 and a second combustion hole 102. The air inlet end of the second combustion hole 102 is independently arranged with the air inlet end of the first combustion hole 101, and is connected with the air outlet end of the first combustion hole 101 and the air outlet end of the second combustion hole 102 and is not connected with the outside world.

[0042] Among them, the combustion plate 110 has a first combustion mode and / or a second combustion mode. In the first combustion mode, the fuel gas output from the first combustion hole 101 flows into the second combustion hole 102, and is mixed with the combustion-supporting gas in the second combustion hole 102 and then output; in the second combustion mode, the mixture of fuel gas and combustion-supporting gas is output from the second combustion hole 102.

[0043] It should be noted that the air inlet end of the second combustion hole 102 is independently arranged from the air inlet end of the first combustion hole 101 , that is, the air inlet end of the second combustion hole 102 is not connected to the air inlet end of the first combustion hole 101 .

[0044] For example, when the first combustion mode (i.e., diffusion combustion) is adopted, the fuel gas outputted from the first combustion hole 101 flows into the second combustion hole 102, and is mixed with the combustion-supporting gas in the second combustion hole 102 and then ejected from the second combustion hole 102, thus realizing the premixing of the gas during diffusion combustion and improving the combustion efficiency;

[0045] When the second combustion mode (i.e., premixed combustion) is adopted, the first combustion hole 101 does not spray gas, and the second combustion hole 102 outputs the mixed gas of fuel gas and combustion-supporting gas, 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 backfire and has high combustion efficiency; when the heat load demand is large, turning on the second combustion mode can effectively reduce the generation of exhaust gas.

[0046] Optionally, the fuel gas is fuel gas, and the combustion-supporting gas is air and / or oxygen.

[0047] The above-mentioned combustion plate 110 has a first combustion hole 101 and a second combustion hole 102. The same combustion plate 110 can meet the needs of different combustion modes at the same time; the outlet end of the first combustion hole 101 is connected to the outlet end of the second combustion hole 102 and is not connected to the outside world. When the heat load demand is small, the first combustion mode is turned on to achieve premixing of the gas during diffusion combustion, thereby improving the combustion efficiency; when the heat load demand is large, the second combustion mode is turned on to effectively reduce the generation of exhaust gas.

[0048] Specifically, please refer to Figure 2 and Figure 3 , along the flow direction of the gas, the cross-sectional area of ​​the second combustion hole 102 gradually increases.

[0049] Here, the gas flow direction of the second combustion hole 102 is Figure 3 In the Z direction, the cross-sectional area of ​​the second combustion hole 102 can change linearly or nonlinearly. Figure 3 The cross-sectional area on the XY plane is shown, where the XY plane is perpendicular to the Z direction.

[0050] More specifically, please refer to Figure 2 and Figure 3 , along the flow direction of the gas, the cross-sectional areas of the first combustion holes 101 are equal.

[0051] Here, the gas flow direction of the first combustion hole 101 includes Figure 3 The cross-sectional area of ​​the first combustion hole 101 is in the Z direction, Z1 direction and Z2 direction. Figure 3 The cross-sectional area on the XY plane is shown, where the XY plane is perpendicular to the Z direction.

[0052] It can be understood that when the first combustion mode (i.e., diffusion combustion) is turned on, the fuel gas output from the first combustion hole 101 flows into the second combustion hole 102, and is mixed with the combustion-supporting gas in the second combustion hole 102 and then ejected from the second combustion hole 102. As the cross-sectional area of ​​the second combustion hole 102 gradually increases, the flow rate of the combustion-supporting gas gradually decreases, making it difficult for the flame to be blown away by the airflow during diffusion combustion, thereby avoiding the occurrence of flame separation. In addition, the flow rate of the combustion-supporting gas decreases, and the contact time between the fuel gas flowing from the first combustion hole 101 into the second combustion hole 102 and the combustion-supporting gas in the second combustion hole 102 increases, so that the combustion is more complete and less exhaust gas is generated.

[0053] When the second combustion mode (i.e. premixed combustion) is turned on, a mixture of fuel gas and combustion-supporting gas is outputted from the second combustion hole 102. As the cross-sectional area of ​​the second combustion hole 102 gradually increases, the flow rate of the mixture gradually decreases, thereby avoiding the flame separation phenomenon. At the same time, the mixture is fully mixed before combustion and then ejected from the second combustion hole 102, thereby achieving stable combustion and effectively shortening the length of the combustion flame.

[0054] In this embodiment, the first combustion hole 101 is cylindrical, and the second combustion hole 102 is conical truncated cone. In other embodiments, the first combustion hole 101 and the second combustion hole 102 may also be in other shapes.

[0055] For details about this embodiment, please refer to Figure 1 The number of the first combustion holes 101 and the number of the second combustion holes 102 are at least two, and the first combustion holes 101 and the second combustion holes 102 are alternately arranged along the length direction and / or the width direction of the combustion plate 110.

[0056] It should be noted that the length direction of the combustion plate 110 is Figure 1 The X direction is shown, and the width direction of the combustion plate 110 is Figure 1 By the above arrangement, when the first combustion mode is turned on, the fuel gas ejected from the first combustion hole 101 can quickly contact with the combustion-supporting gas ejected from the adjacent second combustion hole 102, so that the flame is more stable during diffusion combustion and the flame separation phenomenon is avoided.

[0057] In other embodiments, the first combustion hole 101 and the second combustion hole 102 may also be arranged in zones along the length direction and / or width direction of the combustion plate 110. In this way, the first combustion hole 101 and the second combustion hole 102 are arranged in zones, and when the second combustion mode is turned on, the first combustion hole 101 does not spray gas, and the second combustion hole 102 outputs a mixture of fuel gas and combustion-supporting gas, which can make the area where the second combustion hole 102 sprays gas more concentrated and the combustion more complete.

[0058] For further information, please refer to Figure 3A first combustion hole 101 is provided between every two adjacent second combustion holes 102 , and the gas outlet end of the first combustion hole 101 has two branch channels 103 , and each branch channel 103 is connected to a corresponding second combustion hole 102 .

[0059] It can be understood that when the first combustion mode (i.e., diffusion combustion) is adopted, the fuel gas in each first combustion hole 101 can flow into the corresponding second combustion hole 102 through the branch channel 103, and mix with the combustion-supporting gas in the corresponding second combustion hole 102 before being ejected from the second combustion hole 102, which is beneficial to improving the combustion efficiency.

[0060] In this embodiment, the branch channel 103 may be in a trumpet shape, a cylindrical shape, or other shapes, and the shape of the branch channel 103 is not limited herein.

[0061] For further information, please refer to Figure 3 , the cross-sectional areas of the two branch channels 103 are equal. In this way, the airflow at the outlet end of the first combustion hole 101 is evenly distributed to the corresponding second combustion hole 102 .

[0062] Please refer to Figure 1 In one embodiment, the combustion device 100 includes the above-mentioned combustion plate 110, a first combustion zone and a second combustion zone. The first combustion zone includes at least two first combustion holes 101, and the second combustion zone includes at least two second combustion holes 102.

[0063] The above-mentioned combustion device 100 and combustion plate 110 can simultaneously meet the requirements of different combustion modes, thereby improving the application range of the combustion plate 110; when the heat load demand is small, the first combustion mode is turned on, and flashback is not easy to occur; when the heat load demand is large, the second combustion mode is turned on, which can effectively reduce the generation of exhaust gas.

[0064] For further information, please refer to Figure 2 The combustion device 100 further includes a cooling member 120, which is connected to the combustion plate 110. Thus, the combustion plate 110 is heat-exchanged by the cooling member 120, so that the combustion plate 110 is kept within a normal temperature range.

[0065] Specifically, the first combustion holes 101 and / or the second combustion holes 102 are arranged in the same direction as sub-combustion zones, the number of the sub-combustion zones is at least two, and at least one cooling member 120 is provided between adjacent sub-combustion zones.

[0066] In this embodiment, the tube row of the cooling element 120 may be a single row or multiple rows, and the cross-sectional shape of the cooling element 120 may be circular, square or other shapes, and there is no specific limitation on the tube diameter and wall thickness of the cooling element 120.

[0067] Please refer to Figure 1, a combustion system in one embodiment includes the combustion device 100 described above.

[0068] Specifically, the combustion system also includes an air supply device 200 and a mixing device 300, the mixing device 300 is connected to the second combustion hole 102, the air supply device 200 includes a first air intake component, a second air intake component 202 and a third air intake component, the second air intake component 202 and the third air intake component are both connected to the mixing device 300, and the first air intake component is connected to the first combustion hole 101.

[0069] Among them, the first air intake component and the second air intake component 202 are both used to transport one of the fuel gas or the combustion-supporting gas, and the third air intake component is used to transport the other of the fuel gas or the combustion-supporting gas. At least one of the first air intake component and the second air intake component 202 can be connected.

[0070] It should be noted that the user can turn on the first air intake component and / or the second air intake component 202 according to the heat load demand, that is, turn on at least one corresponding component that supplies combustion-supporting gas or fuel gas.

[0071] Specifically, refer to Figure 1 The combustion device 100 includes a combustion shell, and the mixing device 300 includes a first mixer 310 arranged outside the combustion shell and a second mixer 320 arranged inside the combustion shell. The outlet end of the second mixer 320 is connected to the second combustion hole 102, and the inlet end of the second mixer 320 is connected to the outlet end 313 of the first mixer 310. The second intake assembly 202 and the third intake assembly are both connected to the inlet end of the first mixer 310, and the first mixer 310 is a Venturi structure.

[0072] It should be noted that the first mixer 310 is a Venturi structure, and its operating principle is similar to that of a Venturi tube. Figure 4 The first mixer 310 has a first air inlet end 311, a second air inlet end 312 and an air outlet end 313. After the air enters the first mixer 310 from the first air inlet end 311, the pressure at the throat of the first mixer 310 decreases and generates negative pressure. Under the action of the negative pressure, the gas can be sucked into the first mixer 310 from the second air inlet end 312. At the throat, the air and the gas merge and move together toward the air outlet end 313 of the first mixer 310, playing a role of preliminary mixing. The second mixer 320 is used to further mix the air and the gas so that the premixed combustion can be more fully burned.

[0073] In this embodiment, the first air inlet end 311, the second air inlet end 312 and the air outlet end 313 of the first mixer 310 are arranged on different sides of the first mixer 310, the first air inlet end 311311 is a square opening, and the second air inlet end 312 and the air outlet end 313 are circular openings. In other embodiments, the first air inlet end 311, the second air inlet end 312 and the air outlet end 313 of the first mixer 310 can also be arranged on the same side of the first mixer 310, and the first air inlet end 311, the second air inlet end 312 and the air outlet end 313 can also be in other shapes.

[0074] Specifically, in conjunction with reference Figure 2 , Figure 3 and Figure 4 The second mixer 320 includes a mixing housing 321 and a gas chamber 322 disposed in the mixing housing 321, the gas outlet end of the gas chamber 322 is communicated with the second combustion hole 102, and the gas inlet end of the gas chamber 322 is communicated with the gas outlet end 313 of the first mixer 310. Here, the gas inlet end of the gas chamber 322 is provided with at least two through holes 322a, and the through holes 322a are communicated with the gas outlet end 313 of the first mixer 310. Among them, all the through holes 322a are round holes, square holes or other shapes.

[0075] In this embodiment, reference Figure 2 and Figure 3 The combustion device 100 further includes an ignition needle 130, a combustion plate 110 is accommodated in the mixing housing 321 and divides the mixing housing 321 into a gas chamber 322 and a combustion chamber 323 located at the top of the gas chamber 322, the ignition needle 130 is arranged in the combustion chamber 323, and the first combustion zone and the second combustion zone are arranged in the combustion plate 110. In this way, the gas output from the first combustion zone or the second combustion zone can flow to the combustion chamber 323, be ignited by the ignition needle 130, and burn in the combustion chamber 323.

[0076] In this embodiment, reference Figure 2 and Figure 3 The mixing housing 321 includes a bottom plate 321a, a first side plate 321b and a second side plate 321c. The bottom plate 321a, the first side plate 321b and the second side plate 321c are arranged to form a receiving space. The combustion plate 110 is received in the receiving space and divides the receiving space into a gas chamber 322 and a combustion chamber 323. The combustion chamber 323 is arranged in a height direction (i.e. Figure 3 The bottom plate 321a, the first side plate 321b and the second side plate 321c are fixed by screws and sealed with sealant. Figure 2 A perspective window 324 is provided on the circumferential side wall of the mixing housing 321 , through which the flame state in the combustion chamber 323 can be observed.

[0077] Please refer to Figure 1The third air intake component includes a first air supply component 210 , and the air supply device 200 includes a second air supply component, which can be connected to the first air intake component and / or the second air intake component 202 .

[0078] It should be noted that the first gas supply member 210 is used to supply one of the combustion-supporting gas and the fuel gas, and the second gas supply member is used to supply the other of the combustion-supporting gas and the fuel gas.

[0079] In this embodiment, the first gas supply member 210 is used to supply combustion-supporting gas, and the second gas supply member is used to supply fuel gas. Figure 1 The first air supply member 210 is a fan, and the fan has an air inlet 211 and an air outlet 212, and the air outlet 212 is connected to the first air inlet end 311 of the mixing device 300. When the fan is running, air flows into the fan from the air inlet 211, and is input into the first air inlet end 311 from the air outlet 212, and the air inlet 211 and the air outlet 212 form an air channel. In other embodiments, the first air supply member 210 is used to supply fuel gas, and the second air supply member is used to supply combustion-supporting gas.

[0080] Please refer to Figure 1 The air supply device 200 also includes a control valve 220 arranged on the second air supply component, and the control valve 220 is used to control the connection or blocking of the second air supply component and the first air intake component and / or the second air intake component 202; when the heat load demand is less than the preset heat load amount, the control valve 220 connects the second air supply component and the first air intake component; when the heat load demand is greater than or equal to the preset heat load amount, the control valve 220 connects the second air supply component and the second air intake component 202.

[0081] It can be understood that in the embodiment where the third ventilation component delivers combustion-supporting gas, and the first ventilation component and the second ventilation component 202 deliver fuel gas: when the heat load demand is less than the preset heat load, the control valve 220 conducts between the second air supply component and the first air intake component, and the second air supply component and the second air intake component 202 are not conducted, and the gas is input into the combustion device 100 by the first air intake component, and the gas does not enter the mixing device 300 and does not mix with the air. At this time, when the heat load of the combustion system is small, the diffusion combustion mode is adopted, which can achieve flame stability, and no backfire occurs at a low fire;

[0082] When the heat load demand is greater than or equal to the preset heat load amount, the control valve 220 connects the second air supply component and the second air intake component 202, and the second air supply component and the first air intake component are not connected. The gas is input into the mixing device 300 from the second air intake component 202, and the gas will be mixed with the air in the mixing device 300. At this time, when the heat load of the combustion system is large, a premixed combustion method is adopted to achieve full combustion, high combustion efficiency, and less exhaust gas generation.

[0083] 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. Current required heat load Q = k·C 水 ·(T 设定 -T 进水 )·q, where k is the correction factor, C 水 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.

[0084] The preset heat load is preferably the total heat load of the combustion system or gas equipment * preset percentage. The total heat load of the combustion system or gas equipment is the total heat load input or output of the combustion system or gas equipment, wherein the total heat load input of the combustion system or gas equipment = gas calorific value * gas consumption / t, t is the time required to input the corresponding gas consumption, and the total heat load output of the combustion system or gas equipment = k·C 水 ·25℃·q 标准 , where k is the correction factor, q 标准 is the water inlet flow rate under the standard test conditions of the corresponding combustion system or gas equipment, such as the water inlet flow rate q under the standard test conditions of a 16L gas water heater 标准 It is 16L / min.

[0085] In this embodiment, the preset amount of heat load 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 equipment * 10% to total heat load of the combustion system or gas equipment * 30%, and the preset amount of heat load is preferably total heat load of the combustion system or gas equipment * 20%. In other embodiments, the preset amount of heat load can be any other value.

[0086] In this embodiment, the control valve 220 is an electromagnetic proportional valve, that is, the control valve 220 can be opened and closed by electric control. In other embodiments, the control valve 220 can also be a mechanical control valve, that is, the control valve 220 can be opened and closed manually.

[0087] Please refer to Figure 1 The first air intake assembly includes a first air intake member 201 and a distribution unit 400. The first air intake member 201 is connected to the second air supply member. One end of the first air intake member 201 is connected to the second air supply member, and the other end of the first air intake member 201 is connected to one end of the distribution unit 400. The other end of the distribution unit 400 is connected to the first combustion zone. In this way, the fuel gas supplied by the second air supply member can be input into the distribution unit 400 through the first air intake member 201, and is diverted to the first combustion hole 101 through the distribution unit 400.

[0088] Please refer to Figure 1The distribution unit 400 includes a first distribution component 410 and a second distribution component 420. One end of the first distribution component 410 is connected to the first air inlet component 201, the other end of the first distribution component 410 is connected to one end of the second distribution component 420, and the other end of the second distribution component 420 is connected to the first combustion zone.

[0089] Specifically, the first distribution member 410 is disposed outside the combustion shell, and the second distribution member 420 is disposed inside the combustion shell. In this way, the space utilization rate of the combustion device 100 can be improved.

[0090] In this embodiment, the first distribution member 410 is fixedly connected to the bottom wall of the combustion housing by screws. In other embodiments, the first distribution member 410 can also be detachably connected to the outer wall of the combustion housing by means of snap-fitting or plug-fitting.

[0091] In this embodiment, the first distribution member 410 and the second distribution member 420 are split structures and fixed by welding. In other embodiments, the first distribution member 410 and the second distribution member 420 can also be an integrated structure, which has good integrity and is easy to assemble quickly.

[0092] Please refer to Figure 1 and Figure 4 The second distribution member 420 includes a diverter member 421 and a connecting member 422 . One end of the connecting member 422 is connected to the first combustion hole 101 and the other end is connected to one end of the diverter member 421 . The other end of the diverter member 421 is connected to the first distribution member 410 .

[0093] It can be understood that the gas supplied by the second gas supply member can be diverted to the first combustion hole 101 through the first gas inlet member 201, the first distribution member 410, the diverter member 421 and the connecting member 422, which is conducive to more uniform distribution of the gas.

[0094] In this embodiment, the flow divider 421 and the connecting member 422 are both in the shape of a circular tube. In other embodiments, the flow divider 421 and the connecting member 422 can also be in the shape of a square tube or other shapes.

[0095] In one embodiment, please refer to Figure 4 The first combustion holes 101 and the second combustion holes 102 are distributed in the same direction and form a sub-combustion zone. The sub-combustion zone is arranged downstream of the diverter 421, and the number of the diverter 421 corresponds to the number of the sub-combustion zones.

[0096] Here, the sub-combustion zone is arranged downstream of the diverter 421, which means that along the flow direction of the gas, the gas flows from the diverter 421 to the connecting member 422 and then flows through the sub-combustion zone.

[0097] In another embodiment, please refer to Figure 4The second combustion zone includes at least two second combustion holes 102, and the first combustion zone includes at least two first combustion holes 101. The first combustion holes 101 form a sub-combustion zone, and the second combustion holes 102 form another sub-combustion zone. The sub-combustion zones formed by the first combustion holes 101 and the sub-combustion zones formed by the second combustion holes 102 are arranged alternately, and the sub-combustion zones are arranged downstream of the diverter 421. The number of diverters 421 corresponds one to one to the number of sub-combustion zones formed by the first combustion holes 101.

[0098] For further information, please refer to Figure 4 Each flow divider 421 is connected to at least two connecting members 422, and the number of connecting members 422 corresponds to the number of first combustion holes 101 connected to the corresponding flow divider 421. In this way, the gas is evenly distributed.

[0099] Please refer to Figure 1 , the gas equipment in one embodiment includes the above-mentioned combustion system.

[0100] Specifically, the gas equipment is a water heater or a wall-mounted boiler. In addition to the above-mentioned combustion system, the gas equipment also includes other components such as a shell, a heat exchange system, a control system, and a detection system.

[0101] The above-mentioned gas equipment can meet the needs of different combustion modes at the same time. When the heat load demand is small, the first combustion mode is turned on, and flashback is not easy to occur; when the heat load demand is large, the second combustion mode is turned on, which can effectively reduce the generation of exhaust gas.

[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-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. 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 of the present application shall be subject to the attached claims.

Claims

1. A combustion plate (110), characterized in that: include: A first combustion hole (101); A second combustion hole (102), wherein an air inlet end of the second combustion hole (102) is independently arranged from an air inlet end of the first combustion hole (101), and an air outlet end of the first combustion hole (101) is connected to an air outlet end of the second combustion hole (102) and is not connected to the outside; Wherein, the combustion plate (110) has a first combustion mode and / or a second combustion mode. In the first combustion mode, the fuel gas output from the first combustion hole (101) flows into the second combustion hole (102) and is mixed with the combustion-supporting gas in the second combustion hole (102) and then output; in the second combustion mode, a mixture of fuel gas and combustion-supporting gas is output from the second combustion hole (102).

2. The combustion plate (110) according to claim 1, characterized in that: Along the flow direction of the gas, the cross-sectional area of ​​the second combustion hole (102) gradually increases.

3. The combustion plate (110) according to claim 1, characterized in that: Along the flow direction of the gas, the cross-sectional areas of the first combustion holes (101) are equal.

4. The combustion plate (110) according to claim 1, characterized in that: The number of the first combustion holes (101) and the number of the second combustion holes (102) are both at least two, and the first combustion holes (101) and the second combustion holes (102) are alternately arranged along the length direction and / or the width direction of the combustion plate (110).

5. The combustion plate (110) according to claim 4, characterized in that: A first combustion hole (101) is provided between every two adjacent second combustion holes (102); the gas outlet end of the first combustion hole (101) has two branch channels (103); each branch channel (103) is connected to a corresponding second combustion hole (102).

6. The combustion plate (110) according to claim 5, characterized in that The cross-sectional areas of the two branch channels (103) are equal.

7. A combustion device (100), characterized in that: include: The combustion plate (110), the first combustion zone and the second combustion zone as described in any one of claims 1 to 6, wherein the first combustion zone includes at least two of the first combustion holes (101), and the second combustion zone includes at least two of the second combustion holes (102).

8. The combustion device (100) according to claim 7, characterized in that: The combustion device (100) further comprises a cooling member (120), wherein the cooling member (120) is connected to the combustion plate (110).

9. A combustion system, characterized in that: It comprises the combustion device (100) according to any one of claims 7 to 8.

10. The combustion system according to claim 9, characterized in that: It also includes: a mixing device (300) connected to the second combustion hole (102); An air supply device (200) comprises a first air intake assembly, a second air intake assembly (202) and a third air intake assembly, wherein the second air intake assembly (202) and the third air intake assembly are both connected to the mixing device (300), and the first air intake assembly is connected to the first combustion hole (101); The first air intake component and the second air intake component (202) are both used to transport one of the fuel gas or the combustion-supporting gas, the third air intake component is used to transport the other of the fuel gas or the combustion-supporting gas, and at least one of the first air intake component and the second air intake component (202) can be connected.

11. The combustion system according to claim 10, characterized in that: The combustion device (100) comprises a combustion shell, and the mixing device (300) comprises a first mixer (310) arranged outside the combustion shell and a second mixer (320) arranged inside the combustion shell, the outlet end of the second mixer (320) is connected to the second combustion hole (102), the inlet end of the second mixer (320) is connected to the outlet end (313) of the first mixer (310), the second inlet assembly (202) and the third inlet assembly are both connected to the inlet end of the first mixer (310), and the first mixer (310) is a Venturi structure.

12. The combustion system according to claim 11, characterized in that: The third air intake component comprises a first air supply component (210), and the air supply device (200) comprises a second air supply component, and the second air supply component can be connected to the first air intake component and / or the second air intake component (202).

13. The combustion system according to claim 12, characterized in that: The air supply device (200) further comprises a control valve (220) provided on the second air supply component, wherein the control valve (220) is used to control the connection or blocking between the second air supply component and the first air intake component and / or the second air intake component (202); When the heat load demand is less than the preset heat load amount, the control valve (220) connects the second air supply component and the first air intake component; when the heat load demand is greater than or equal to the preset heat load amount, the control valve (220) connects the second air supply component and the second air intake component (202).

14. The combustion system according to claim 12, characterized in that: The first air intake component comprises a first air intake member (201) and a distribution unit (400), one end of the first air intake member (201) is connected to the second air supply member, and the other end of the first air intake member (201) is connected to one end of the distribution unit (400), and the other end of the distribution unit (400) is connected to the first combustion hole (101).

15. The combustion system according to claim 14, characterized in that The distribution unit (400) comprises a first distribution component (410) and a second distribution component (420), one end of the first distribution component (410) is connected to the first air intake component (201), the other end of the first distribution component (410) is connected to one end of the second distribution component (420), and the other end of the second distribution component (420) is connected to the first combustion zone.

16. The combustion system according to claim 15, characterized in that The first distribution member (410) is arranged outside the combustion housing, and the second distribution member (420) is arranged inside the combustion housing.

17. The combustion system according to claim 15, characterized in that The second distribution member (420) includes a diverter member (421) and a connecting member (422), one end of the connecting member (422) is connected to the first combustion hole (101), and the other end of the connecting member (422) is connected to one end of the diverter member (421), and the other end of the diverter member (421) is connected to the first distribution member (410).

18. The combustion system according to claim 17, characterized in that The first combustion holes (101) and the second combustion holes (102) are distributed along the same direction and form a sub-combustion zone. The sub-combustion zone is arranged downstream of the diverter (421), and the number of the diverter (421) corresponds to the number of the sub-combustion zones.

19. The combustion system according to claim 17, characterized in that: The first combustion hole (101) forms a sub-combustion zone, and the second combustion hole (102) forms another sub-combustion zone. The sub-combustion zone formed by the first combustion hole (101) and the sub-combustion zone formed by the second combustion hole (102) are arranged alternately. The sub-combustion zones are arranged downstream of the diverter (421), and the number of the diverter (421) corresponds one-to-one to the number of the sub-combustion zones formed by the first combustion hole (101).

20. The combustion system according to claim 18 or 19, characterized in that: At least two connecting members (422) are connected to each of the flow dividing members (421), and the number of the connecting members (422) corresponds one-to-one to the number of the first combustion holes (101) connected to the corresponding flow dividing members (421).

21. A gas equipment, characterized in that: Comprising a combustion system as described in any one of claims 9-20.

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