Combustion system, gas equipment and combustion control method

Abstract

The invention relates to a combustion system, gas equipment and a combustion control method, a gas supply device comprises a gas inlet assembly, a first air inlet assembly and a second air inlet assembly, the second air inlet assembly and the gas inlet assembly communicate with a mixing device, and the first air inlet assembly communicates with a combustion device; at least one of the first air inlet assembly and the second air inlet assembly can be conducted. The gas equipment comprises the combustion system. The combustion control method comprises the steps that the heat load demand quantity is obtained, and the first air inlet assembly and / or the second air inlet assembly are / is conducted according to the heat load demand quantity. According to the combustion system, the fuel gas equipment and the combustion control method, at least one air inlet assembly corresponding to the heat load demand quantity is selected according to the heat load demand quantity, so that air and fuel gas are not mixed or mixed before entering the combustion device, and the air and the fuel gas are switched to different combustion modes; therefore, the combustion requirements of the combustion system under different thermal loads are met.

Description

Technical Field

[0001] The present application relates to the technical field of hot water equipment, and in particular to a combustion system, a gas equipment and a combustion control method. 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 system, gas equipment and combustion control method to address the problem that the existing combustion system cannot adapt to the heat load requirements of multiple working conditions.

[0004] A combustion system includes a combustion device, a mixing device and an air supply device, wherein the air supply device includes an air intake assembly, a first air intake assembly and a second air intake assembly, wherein the second air intake assembly and the air intake assembly are both connected to the mixing device, and the first air intake assembly is connected to the combustion device; wherein at least one of the first air intake assembly and the second air intake assembly can be connected.

[0005] In the above-mentioned combustion system, the air supply device has two different air inlet components. The user can select at least one corresponding air inlet component according to the heat load demand, so that the air and gas are not mixed or mixed before entering the combustion device, so that the air and gas can be switched to different combustion modes, thereby adapting to the combustion requirements of the combustion system under different heat loads.

[0006] In one embodiment, the air intake component includes a second air supply component for supplying fuel gas, and the air supply device includes a first air supply component 210 for supplying combustion-supporting gas, the first air supply component has an air inlet end, a first air outlet end and a second air outlet end, the first air outlet end is connected to the first air intake component, the second air outlet end is connected to the second air intake component, and at least one of the first air outlet end and / or the second air outlet end can be connected.

[0007] In one embodiment, the air supply device also includes a control valve arranged on the first air supply part, and the control valve is used to control the first air outlet and / or the second air outlet to be turned on or off; when the heat load demand is less than the preset heat load amount, the control valve turns on the first air outlet; when the heat load demand is greater than or equal to the preset heat load amount, the control valve turns on the second air outlet.

[0008] In one embodiment, the combustion device includes a first combustion zone and a second combustion zone, the second combustion zone is connected to the mixing device, and the first combustion zone is connected to the first air inlet assembly.

[0009] In one embodiment, the mixing device includes a first mixer arranged outside the combustion device and a second mixer arranged inside the combustion device, the air outlet end of the second mixer is connected to the second combustion zone, the air inlet end of the second mixer is connected to the air outlet end of the first mixer, the second air inlet assembly and the air inlet assembly are both connected to the air inlet end of the first mixer, and the first mixer is a Venturi structure.

[0010] In one embodiment, the first air inlet assembly includes a first air inlet member and a distribution unit, one end of the first air inlet member is connected to the first air outlet end and the other end is connected to one end of the distribution unit, and the other end of the distribution unit is connected to the first combustion zone.

[0011] 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 inlet member and the other end 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.

[0012] In one embodiment, the first distribution member is disposed outside the combustion device, and the second distribution member is disposed inside the second mixer.

[0013] In one embodiment, the first combustion zone includes a first combustion hole, and 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 is connected to one end of the diverter, and the other end of the diverter is connected to the first distribution member.

[0014] In one embodiment, the second combustion zone includes at least two second combustion holes, and the first combustion zone includes at least two first combustion holes. The first combustion holes and the second combustion holes are distributed in the same direction to form a sub-combustion zone. The sub-combustion zone is arranged downstream of the diverter, and the number of the diverter corresponds one-to-one to the number of the sub-combustion zones.

[0015] In one embodiment, the second combustion zone includes at least two second combustion holes, and the first combustion zone includes at least two first combustion holes, the first combustion holes form a sub-combustion zone, and the second combustion holes form another sub-combustion zone, the sub-combustion zones formed by the first combustion holes and the sub-combustion zones formed by the second combustion holes are arranged alternately, and the sub-combustion zones are arranged downstream of the diverter, and the number of the diverters corresponds one-to-one to the number of sub-combustion zones formed by the first combustion holes.

[0016] 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.

[0017] A gas-burning device comprises the above-mentioned combustion system.

[0018] In the above-mentioned gas equipment, the gas supply device of the combustion system has two different air inlet components. At least one corresponding air inlet component is selected according to the heat load demand, so that the air and gas can be unmixed or mixed before entering the combustion device, so that the air and gas can be switched to different combustion modes, thereby adapting to the combustion requirements of the combustion system under different heat loads.

[0019] A combustion control method is based on the above-mentioned combustion system or based on the above-mentioned gas equipment, and the combustion control method includes: obtaining a heat load demand, and turning on the first air inlet component and / or the second air inlet component according to the heat load demand.

[0020] The above-mentioned combustion control method selects at least one corresponding air inlet component according to the heat load demand, which can make the air and gas not mixed or mixed before entering the combustion device, so that the air and gas can switch to different combustion modes, thereby adapting to the combustion requirements of the combustion system under different heat loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of a combustion system in one embodiment.

[0022] Figure 2 for Figure 1 Schematic diagram of the combustion system diffusion combustion shown.

[0023] Figure 3 for Figure 1 Schematic diagram of the premixed combustion system shown.

[0024] Figure 4 for Figure 1 Schematic diagram of the mixing device in the combustion system shown.

[0025] Reference numerals:

[0026] 100, combustion device; 101, first combustion hole; 102, second combustion hole; 200, air supply device; 201, first air inlet member; 202, air inlet assembly; 210, first air supply member; 211, air inlet end; 212, first air outlet end; 213, second air outlet end; 220, control valve; 300, mixing device; 310, first mixer; 311, mixing chamber; 311, first air inlet end; 312, second air inlet end; 313, air outlet end; 320, second mixer; 321, air inlet end; 322, air outlet end; 400, distribution unit; 410, first distribution part; 420, second distribution part; 421, diverter; 422, connecting part. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Please refer to Figure 1 In one embodiment, the combustion system includes a combustion device 100, a mixing device 300 and an air supply device 200. The air supply device 200 includes an air intake assembly 202, a first air intake assembly and a second air intake assembly. The second air intake assembly and the air intake assembly 202 are both connected to the mixing device 300, and the first air intake assembly is connected to the combustion device 100. At least one of the first air intake assembly and the second air intake assembly can be connected.

[0034] It should be noted that the air inlet assembly 202 is used to supply fuel gas such as fuel gas, and the first air inlet assembly and the second air inlet assembly are both used to supply combustion-supporting gas such as air or oxygen. The user can choose to turn on at least one of the first air inlet assembly and the second air inlet assembly according to the heat load demand, that is, the user can select at least one corresponding component for supplying combustion-supporting gas according to the heat load demand.

[0035] For example, refer to Figure 2When the heat load demand is small, only the first air inlet assembly is turned on, the gas is input into the combustion device 100 through the air inlet assembly 202 and the mixing device 300, and the air is input into the combustion device 100 through the first air inlet assembly. After the air and gas are sprayed into the combustion device 100, they are mixed and burned in the combustion device 100. This is the diffusion combustion mode. Figure 3 When the heat load demand is large, only the second air inlet component is turned on, and the gas input by the air inlet component 202 and the air input by the second air inlet component are premixed in the mixing device 300 and then output to the combustion device 100 for combustion. This is a premixed combustion mode; alternatively, the first air inlet component and the second air inlet component can be turned on at the same time. At this time, there are both premixed combustion mode and diffusion combustion mode in the combustion device 100.

[0036] In the above-mentioned combustion system, the air supply device 200 has two different air inlet components. The user can select at least one corresponding air inlet component according to the heat load demand, which can make the air and gas not mixed or mixed before entering the combustion device 100, so that the air and gas can be switched to different combustion modes, thereby adapting to the combustion requirements of the combustion system under different heat loads.

[0037] In the above embodiment, whether in diffusion combustion mode or premixed combustion mode, the air intake assembly 202 is always the same, that is, the path for supplying fuel gas is the same, so that improvements are made on the basis of retaining the original structure of the air supply device 200, which is conducive to cost savings.

[0038] Please refer to Figure 1 and Figure 2 The air intake component 202 includes a second air supply component for supplying fuel gas, and the air supply device 200 includes a first air supply component 210 for supplying combustion-supporting gas. The first air supply component 210 has an air inlet end 211, a first air outlet end 212 and a second air outlet end 213. The first air outlet end 212 is connected to the first air inlet component, and the second air outlet end 213 is connected to the second air inlet component. At least one of the first air outlet end 212 and the second air outlet end 213 can be conducted.

[0039] In this embodiment, the first air supply member 210 is a fan. In other embodiments, the first air supply member 210 can also be other types of air supply structures.

[0040] In this embodiment, the air inlet 211, the first air outlet 212 and the second air outlet 213 are disposed on different sides of the first air supply member 210. In other embodiments, the air inlet 211, the first air outlet 212 and the second air outlet 213 may also be located on the same side.

[0041] Please refer to Figure 3The air supply device 200 also includes a control valve 220 arranged on the first air supply part, and the control valve 220 is used to control the first air outlet end 212 and / or the second air outlet end 213 to be turned on or off; when the heat load demand is less than the preset heat load amount, the control valve 220 turns on the first air outlet end 212; when the heat load demand is greater than the preset heat load amount, the control valve 220 turns on the second air outlet end 213.

[0042] It can be understood that when the heat load demand is less than the preset heat load amount, the control valve 220 only connects the first air outlet end 212, and air is input into the combustion device 100 through the first air inlet component. The air will not enter the mixing device 300 and will not mix with the gas. At this time, when the heat load demand is relatively small, a diffusion combustion method is adopted to achieve flame stability and no backfire occurs at a low fire. When the heat load demand is greater than the preset heat load amount, the control valve 220 only connects the second air outlet end 213, and air is input into the mixing device 300 through the second air inlet component. The air will mix with the gas in the mixing device 300. At this time, when the heat load demand is relatively large, a premixed combustion method is adopted to achieve full combustion, high combustion efficiency, and less exhaust gas generated.

[0043] 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.

[0044] Please refer to Figure 3 The combustion device 100 includes a first combustion zone and a second combustion zone, the second combustion zone is connected to the mixing device 300, and the first combustion zone is connected to the first air inlet assembly.

[0045] Specifically, please refer to Figure 2 and Figure 3 The mixing device 300 includes a first mixer 310 disposed outside the combustion device 100 and a second mixer 320 disposed inside the combustion device 100. The air outlet end of the second mixer 320 is connected to the second combustion zone, the air inlet end 321 of the second mixer 320 is connected to the air outlet end 313 of the first mixer 310, the second air inlet assembly and the air inlet assembly 202 are both connected to the air inlet end of the first mixer 310, and the first mixer 310 is a Venturi structure.

[0046] 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 4The 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.

[0047] 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 311 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.

[0048] Please refer to Figure 1 The first air inlet assembly includes a first air inlet member 201 and a distribution unit 400. One end of the first air inlet member 201 is connected to the first air outlet end 212 and the other end 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 combustion-supporting gas supplied by the first air supply member can be input into the distribution unit 400 through the first air inlet member 201, and is diverted to the first combustion zone through the distribution unit 400.

[0049] Please refer to Figure 1 The distribution unit 400 includes a first distribution member 410 and a second distribution member 420. One end of the first distribution member 410 is connected to the first air inlet member 201 and the other end is connected to one end of the second distribution member 420. The other end of the second distribution member 420 is connected to the first combustion zone.

[0050] Specifically, the first distribution member 410 is disposed outside the combustion device 100, and the second distribution member 420 is disposed inside the second mixer 320. In this way, the space utilization of the combustion device 100 and the second mixer 320 can be improved.

[0051] In this embodiment, the first distribution member 410 is fixedly connected to the bottom wall of the combustion device 100 by screws. In other embodiments, the first distribution member 410 can also be detachably connected to the outer wall of the combustion device 100 by snap-fitting or plug-in.

[0052] 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.

[0053] Please refer to Figure 1 The first combustion zone includes a first combustion hole 101, and the second distribution member 420 includes a diverter 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 421. The other end of the diverter 421 is connected to the first distribution member 410.

[0054] It can be understood that the combustion-supporting gas supplied by the first gas supply member can be diverted to the first combustion zone 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 a more uniform distribution of the combustion-supporting gas.

[0055] 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.

[0056] In one embodiment, please refer to Figure 1 The second combustion zone includes at least two second combustion holes 102. The first combustion holes 101 and the second combustion holes 102 are distributed along the same direction to form a sub-combustion zone. The sub-combustion zone is arranged downstream of the diverter 421. The number of diverters 421 corresponds to the number of sub-combustion zones.

[0057] 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.

[0058] It should be noted that during diffusion combustion, the control valve 220 conducts the first air outlet 212, opens the first air supply member 210 and the second air supply member, and after the second air supply member supplies the gas to the first mixer 310, the gas flows into the second mixer 320 and is ejected from the second combustion hole 102 of the second combustion zone connected to the second mixer 320. Since the second air outlet 213 is not conducted, the air cannot enter the first mixer 310 and the second mixer 320 from the second air inlet assembly, and the air flows into the first air inlet assembly and is ejected from the first combustion hole 101 of the first combustion zone connected to the first air inlet assembly 101. After the gas and air are mixed for the first time in the combustion device 100, they are ignited by the ignition needle and burn in the combustion chamber of the combustion device 100, so that flame-stable combustion can be achieved.

[0059] During premixed combustion, the control valve 250 connects to the second air outlet end 213, opens the first air supply part 210 and the second air supply part, and the first air supply part 210 supplies air to the first mixer 310. The gas is sucked into the first mixer 310 from the second air inlet end 312 under the negative pressure of the Venturi structure, and the air and gas are premixed in the first mixer 310. The premixed gas enters the second mixer 320 for further mixing and is ejected from the second combustion hole 102 in the second combustion zone connected to the second mixer 320. The mixed gas is ignited by the ignition needle and burns in the combustion chamber of the combustion device 100, thereby achieving full combustion, high combustion efficiency, and less exhaust gas generation.

[0060] Preferably, along the gas flow direction, the second combustion hole 102 is a trumpet-shaped hole with a gradually increasing cross-sectional area. During diffusion combustion, the gas is ejected from the second combustion hole 102. Since the cross-sectional area of ​​the second combustion hole 102 gradually increases, the flow rate of the gas decreases, making it less likely for flame separation to occur during diffusion combustion, and the contact time between the air and the gas ejected from the first combustion hole 101 increases, resulting in more complete mixing before combustion, more complete combustion, and less exhaust gas generated; during premixed combustion, a mixed gas of air and gas is ejected from the second combustion hole 102. Since the cross-sectional area of ​​the second combustion hole 102 gradually increases, the mixing flow rate decreases, making it less likely for flame separation to occur during premixed combustion. In addition, since premixed combustion is only turned on when the combustion heat load demand is large, it is not easy to produce backfire.

[0061] In this embodiment, the first combustion hole 101 and the second combustion hole 102 are arranged along Figure 1 The X direction and / or Y direction are alternately distributed, Figure 1 The X direction is the length direction of the combustion device 100. Figure 1 The Y direction is the width direction of the combustion device 100. In this way, it can effectively ensure that the air ejected from the second combustion hole 102 and the gas ejected from the first combustion hole 101 are evenly distributed during diffusion combustion, which is conducive to the uniform mixing of air and gas, and avoids the shortening of the life of the combustion device 100 due to uneven temperature distribution during combustion of the combustion device 100. At the same time, the first combustion hole 101 and the second combustion hole 102 are alternately distributed along the same direction, which can ensure that the second combustion hole 102 is evenly distributed in the combustion device 100, thereby ensuring that the mixed gas ejected from the second combustion hole 102 is evenly distributed in the combustion device 100, and avoids the shortening of the life of the combustion device 100 due to uneven temperature distribution during combustion of the combustion device 100.

[0062] In other embodiments, the first combustion holes 101 and the second combustion holes 102 may also be distributed in other ways, for example: the first combustion zone formed by the first combustion hole 101 and the second combustion zone formed by the second combustion hole 102 are distributed left and right along the length direction of the combustion device 100 or left and right along the width direction; or there are at least two first combustion zones and at least two second combustion zones, the first combustion zone includes at least two first combustion holes 101, the second combustion zone includes at least two second combustion holes 102, and the first combustion zone or the second combustion zone is evenly distributed on the combustion device 100.

[0063] In another embodiment, please refer to Figure 1 The 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.

[0064] For further information, please refer to Figure 1 Each flow dividing member 421 is connected with 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 dividing member 421. In this way, the air is evenly divided.

[0065] Please refer to Figure 1 , the gas equipment in one embodiment includes the above-mentioned combustion system.

[0066] 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.

[0067] In the above-mentioned gas equipment, the gas supply device 200 of the combustion system has two different air inlet components. At least one corresponding air inlet component is selected according to the heat load demand, so that the air and gas are not mixed or mixed before entering the combustion device 100, so that the air and gas can be switched to different combustion modes, thereby adapting to the combustion requirements of the combustion system under different heat loads.

[0068] Please refer to Figure 1 The combustion control method in one embodiment is based on the above combustion system or based on the above gas equipment, and the combustion control method includes:

[0069] The heat load demand is obtained, and the first air inlet component and / or the second air inlet component is turned on according to the heat load demand.

[0070] The above-mentioned combustion control method selects at least one corresponding air inlet component according to the heat load demand, which can make the air and gas not mixed or mixed before entering the combustion device 100, so that the air and gas can switch to different combustion modes, thereby adapting to the combustion requirements of the combustion system under different heat loads.

[0071] Specifically, the heat load demand of the current user is obtained. When the heat load demand of the user is less than the preset heat load, the first air inlet component is turned on and diffusion combustion is adopted; when the heat load demand of the user is greater than or equal to the preset heat load, the second air inlet component is turned on and premixed combustion is adopted.

[0072] 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.

[0073] 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.

[0074] 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 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.

[0075] 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.

[0076] 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 system, characterized in that: include: A combustion device (100); A mixing device (300); An air supply device (200) comprises an air intake assembly (202), a first air intake assembly and a second air intake assembly, wherein the second air intake assembly and the air intake assembly (202) are both connected to the mixing device (300), and the first air intake assembly is connected to the combustion device (100); Wherein, at least one of the first air inlet component and the second air inlet component can be turned on.

2. The combustion system according to claim 1, characterized in that: The air intake component (202) includes a second air supply component for supplying fuel gas, and the air supply device (200) includes a first air supply component (210) for supplying combustion-supporting gas, the first air supply component (210) having an air inlet end (211), a first air outlet end (212) and a second air outlet end (213), the first air outlet end (212) being connected to the first air intake component, the second air outlet end (213) being connected to the second air intake component, and at least one of the first air outlet end (212) and the second air outlet end (213) being able to be connected.

3. The combustion system according to claim 2, characterized in that: The air supply device (200) further comprises a control valve (220) arranged on the first air supply component, wherein the control valve (220) is used to control the first air outlet end (212) and / or the second air outlet end (213) to be turned on or off; When the heat load demand is less than the preset heat load amount, the control valve (220) opens the first air outlet (212); when the heat load demand is greater than or equal to the preset heat load amount, the control valve (220) opens the second air outlet (213).

4. The combustion system according to claim 2, characterized in that: The combustion device (100) comprises a first combustion zone and a second combustion zone, the second combustion zone is connected to the mixing device (300), and the first combustion zone is connected to the first air inlet assembly.

5. The combustion system according to claim 4, characterized in that: The mixing device (300) comprises a first mixer (310) arranged outside the combustion device (100) and a second mixer (320) arranged inside the combustion device (100); the air outlet end of the second mixer (320) is connected to the second combustion zone; the air inlet end of the second mixer (320) is connected to the air outlet end (313) of the first mixer (310); the second air inlet assembly and the air inlet assembly (202) are both connected to the air inlet end of the first mixer (310); and the first mixer (310) is a Venturi structure.

6. The combustion system according to claim 5, 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 first air outlet end (212) and the other end 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 zone.

7. The combustion system according to claim 6, characterized in that: The distribution unit (400) comprises a first distribution member (410) and a second distribution member (420), one end of the first distribution member (410) is connected to the first air intake member (201) and the other end is connected to one end of the second distribution member (420), and the other end of the second distribution member (420) is connected to the first combustion zone.

8. The combustion system according to claim 7, characterized in that: The first distribution member (410) is arranged outside the combustion device (100), and the second distribution member (420) is arranged inside the second mixer (320).

9. The combustion system according to claim 7, characterized in that: The first combustion zone includes a first combustion hole (101), and 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), and the other end of the diverter member (421) is connected to the first distribution member (410).

10. The combustion system according to claim 9, characterized in that: The 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) and the second combustion holes (102) are distributed along the same direction to form a sub-combustion zone. The sub-combustion zone is 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.

11. The combustion system according to claim 9, characterized in that: The 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 the diverter (421) corresponds one-to-one to the number of the sub-combustion zones formed by the first combustion holes (101).

12. The combustion system according to claim 10 or 11, 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).

13. A gas equipment, characterized in that: Comprising a combustion system as claimed in any one of claims 1 to 12.

14. A combustion control method, characterized in that: Based on the combustion system according to any one of claims 1 to 12 or based on the gas equipment according to claim 13, the combustion control method comprises: A heat load demand is obtained, and the first air inlet component and / or the second air inlet component is turned on according to the heat load demand.

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