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, in a first combustion mode, one of fuel gas and combustion-supporting gas is output through the first combustion hole, and the other of the fuel gas and the combustion-supporting gas is output through the second combustion hole; and in the second combustion mode, mixed gas of the fuel gas and the combustion-supporting gas is output through the second combustion hole or the first combustion hole. 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, when the heat load demand quantity is small, the first combustion mode is started, and backfire is not prone to being generated; and when the heat load demand is large, the second combustion mode is started, and waste gas can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of combustion 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 burners. 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 usage 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 includes a first combustion hole and a second combustion hole, and the combustion plate has a first combustion mode and / or a second combustion mode. In the first combustion mode, one of fuel gas and combustion-supporting gas is output from the first combustion hole, and the other of fuel gas and combustion-supporting gas is output from the second combustion hole; in the second combustion mode, a mixture of fuel gas and combustion-supporting gas is output from the second combustion hole or the first combustion hole.

[0005] The above-mentioned combustion plate has a first combustion hole and a second combustion hole, and can output airflow through the corresponding fire holes. The same combustion plate can simultaneously meet the needs of different combustion modes, thereby improving the applicability of the combustion plate. When the heat load demand is small, the first combustion mode is turned on, and backfire 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.

[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 both at least two, and the first combustion holes and the second combustion holes are alternately arranged along the same direction.

[0009] In one embodiment, the first combustion holes and the second combustion holes are alternately arranged along the length direction and / or width direction of the combustion plate.

[0010] 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 arranged in partitions along the same direction.

[0011] The first combustion holes and the second combustion holes are arranged in partitions along the length direction and / or width direction of the combustion plate.

[0012] In one embodiment, the combustion plate includes a combustion body and a fire bar, the second combustion hole is arranged on the combustion body, and the first combustion hole is arranged on the fire bar.

[0013] 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.

[0014] In the above-mentioned combustion device, the combustion plate can simultaneously meet the needs of different combustion modes, thereby improving the application range of the combustion plate; when the heat load demand is small, turning on the first combustion mode will not easily cause backfire; when the heat load demand is large, turning on the second combustion mode can effectively reduce the generation of exhaust gas.

[0015] In one of the embodiments, the combustion device further comprises a cooling element, wherein the cooling element is connected to the combustion plate.

[0016] In one of the embodiments, the first combustion holes and / or the second combustion holes 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 element is provided between adjacent sub-combustion zones.

[0017] A combustion system comprises the above combustion device.

[0018] In the above-mentioned combustion system, the combustion plate can simultaneously meet the needs of different combustion modes, thereby improving the application range of the combustion plate; 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.

[0019] In one embodiment, the combustion device further includes a mixing device and an air supply device, the mixing device is communicated with the second combustion zone, the air supply device includes a first ventilation component, a second ventilation component and a third ventilation component, the second ventilation component and the third ventilation component are both communicated with the mixing device, and the first ventilation component is communicated with the first combustion zone;

[0020] Among them, the third ventilation assembly is used to transport one of fuel gas and combustion-supporting gas, the first ventilation assembly and the second ventilation assembly are both used to transport the other of fuel gas or combustion-supporting gas, and at least one of the first ventilation assembly and the second ventilation assembly can be conducted.

[0021] In one embodiment, the third ventilation component includes a first air supply component, the air supply device includes a second air supply component, the first air supply component is provided with the third ventilation component, and the second air supply component can be connected to the first ventilation component and / or the second ventilation component.

[0022] 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 ventilation component and / or the second ventilation component; when the heat load demand is less than the preset heat load amount, the control valve connects the second air supply member and the first ventilation component; when the heat load demand is greater than or equal to the preset heat load amount, the control valve connects the second air supply member and the second ventilation component.

[0023] 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 outlet end of the second mixer is connected to the second combustion zone, the inlet end of the second mixer is connected to the outlet end of the first mixer, the second ventilation assembly and the third ventilation assembly are both connected to the inlet end of the first mixer, and the first mixer is a Venturi structure.

[0024] In one embodiment, the first ventilation assembly includes a first air inlet and a distribution unit, one end of the first air inlet is connected to the second air supply member 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.

[0025] 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.

[0026] In one embodiment, the first distribution member is disposed outside the combustion device, and the second distribution member is disposed inside the second mixer.

[0027] 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 is connected to one end of the diverter, and the other end of the diverter is connected to the first distribution member.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] A gas-burning device comprises the above-mentioned combustion system.

[0032] In the above-mentioned gas equipment, the combustion plate can meet the needs of different combustion modes at the same time, thereby improving the application range of the combustion plate; when the heat load demand is small, turning on the first combustion mode is not easy to cause backfire; when the heat load demand is large, turning on the second combustion mode can effectively reduce the generation of exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of a combustion device in one embodiment.

[0034] Figure 2 for Figure 1 Schematic diagram of the combustion plate in the combustion device shown.

[0035] Figure 3 for Figure 2 Schematic diagram of the combustion plate shown.

[0036] Figures 4 to 5 Schematic diagram of a combustion plate in some embodiments.

[0037] Figure 6 Schematic diagram of the combustion plate in some other embodiments.

[0038] Figure 7 Schematic diagram of the combustion plate in some other embodiments.

[0039] Figure 8 for Figure 7 Schematic diagram of the fire row in the combustion plate shown.

[0040] Fig. 9 for Figure 1 Schematic diagram of the mixer in the combustion device shown.

[0041] Reference numerals:

[0042] 100, combustion device; 110, combustion plate; 101, first combustion hole; 102, second combustion hole; 111, combustion body; 112, fire grate; 120, cooling element; 200, air supply device; 201, first air inlet; 202, second ventilation assembly; 210, first air supply; 211, air inlet; 212, air outlet; 220, control valve; 300, mixing device; 310, first mixer; 311, first air inlet end; 312, second air inlet end; 313, air outlet end; 320, second mixer; 400, distribution unit; 410, first distribution element; 420, second distribution element; 421, diverter; 422, connecting element. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] Please refer to Figure 1 and Figure 2 In one embodiment, the combustion plate 110 includes a first combustion hole 101 and a second combustion hole 102. The combustion plate 110 has a first combustion mode and / or a second combustion mode. In the first combustion mode, one of the fuel gas and the combustion-supporting gas is output from the first combustion hole 101, and the other of the fuel gas and the combustion-supporting gas is output from the second combustion hole 102; in the second combustion mode, a mixture of the fuel gas and the combustion-supporting gas is output from the second combustion hole 102 or the first combustion hole 101.

[0050] For example, when the first combustion mode is adopted, the fuel gas is output from the first combustion hole 101, and the combustion-supporting gas is output from the second combustion hole 102. At this time, the combustion plate is in diffusion combustion, ensuring the flame stability during diffusion combustion; when the second combustion mode 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. At this time, the combustion plate is in premixed combustion, which can shorten the flame length during premixed combustion and achieve stable combustion. In addition, when the heat load demand is small, turning on the first combustion mode is not easy to cause flashback; when the heat load demand is large, turning on the second combustion mode can effectively reduce the generation of exhaust gas.

[0051] Optionally, the fuel gas is fuel gas, and the combustion-supporting gas is air and / or oxygen.

[0052] The above-mentioned combustion plate 110 has a first combustion hole 101 and a second combustion hole 102, and can output airflow through the corresponding fire holes. The same combustion plate 110 can simultaneously meet the needs of different combustion modes, thereby improving the applicability of the combustion plate 110; when the heat load demand is small, turning on the first combustion mode will not easily cause backfire; when the heat load demand is large, turning on the second combustion mode can effectively reduce the generation of exhaust gas.

[0053] Specifically, please refer to Figure 2 , along the flow direction of the gas, the cross-sectional area of ​​the second combustion hole 102 gradually increases.

[0054] Here, the gas flow direction of the second combustion hole 102 is Figure 2 In the Z direction, the cross-sectional area of ​​the second combustion hole 102 is Figure 2 The cross-sectional area on the XY plane shown, where the XY plane is perpendicular to the Z direction. Figure 2 In the Z direction shown, the cross-sectional area of ​​the second combustion hole 102 may vary linearly or nonlinearly.

[0055] More specifically, please refer to Figure 2 , along the flow direction of the gas, the cross-sectional areas of the first combustion holes 101 are equal.

[0056] Here, the gas flow direction of the first combustion hole 101 is Figure 2 In the Z direction, the cross-sectional area of ​​the first combustion hole 101 is Figure 2 The cross-sectional area on the XY plane is shown, where the XY plane is perpendicular to the Z direction.

[0057] It can be understood that when the first combustion mode (i.e., diffusion combustion) is turned on and the combustion-supporting gas is sprayed out from the second combustion hole 102, the cross-sectional area of ​​the second combustion hole 102 gradually increases and the flow rate of the combustion-supporting gas gradually decreases, so that the flame is not easily blown away by the airflow during diffusion combustion, thereby avoiding the flame separation phenomenon; in addition, the flow rate of the combustion-supporting gas is reduced, and the contact time between the combustion-supporting gas and the fuel gas sprayed out from the first combustion hole 101 is increased, so that the combustion is more complete and less exhaust gas is generated.

[0058] When the second combustion mode (i.e. premixed combustion) is turned on and a mixture of fuel gas and combustion-supporting gas is outputted from the second combustion hole 102, the flow rate of the mixture gradually decreases as the cross-sectional area of ​​the second combustion hole 102 gradually increases, 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.

[0059] In this embodiment, the first combustion hole 101 is cylindrical, and the second combustion hole 102 is conical frustum. In other embodiments, the first combustion hole 101 and the second combustion hole 102 may also be in other shapes.

[0060] In some embodiments, please refer to Figures 3 to 5 , 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 arranged alternately along the same direction. In this way, the first combustion holes 101 and the second combustion holes 102 are arranged alternately along the same direction. When the first combustion mode is turned on, the fuel gas ejected from the first combustion hole 101 can quickly contact the adjacent combustion-supporting gas ejected from the second combustion hole 102, so that the flame is more stable during diffusion combustion and the flame separation phenomenon is avoided.

[0061] Specifically, the first combustion holes 101 and the second combustion holes 102 are arranged alternately along the length direction and / or the width direction of the combustion plate 110. Figures 3 to 5 The X direction is shown, and the width direction of the combustion plate 110 is Figures 3 to 5 Y direction shown.

[0062] For example, refer to Figure 3 From left to right along the length direction of the combustion plate 110, the first one is the second combustion hole 102, the second one is the first combustion hole 101, the third one is the second combustion hole 102, and the fourth one is the first combustion hole 101. The first combustion hole 101 and the second combustion hole 102 are arranged alternately along the length direction of the combustion plate 110.

[0063] For example, refer to Figure 4, from top to bottom along the width direction of the combustion plate 110, the first one is the second combustion hole 102, the second one is the first combustion hole 101, the third one is the second combustion hole 102, and the fourth one is the first combustion hole 101. The first combustion holes 101 and the second combustion holes 102 are arranged alternately along the width direction of the combustion plate 110.

[0064] For example, refer to Figure 5 , along the width direction of the combustion plate 110 from top to bottom, the first combustion holes 101 and the second combustion holes 102 are arranged alternately; and along the length direction of the combustion plate 110 from left to right, the first combustion holes 101 and the second combustion holes 102 are arranged alternately along the length direction of the combustion plate 110.

[0065] In other embodiments, please refer to Figure 6 The number of the first combustion hole 101 and the number of the second combustion hole 102 are at least two, and the first combustion hole 101 and the second combustion hole 102 are arranged in the same direction. In this way, the first combustion hole 101 and the second combustion hole 102 are arranged in a zone. 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.

[0066] Specifically, the first combustion holes 101 and the second combustion holes 102 are arranged in partitions along the length direction and / or the width direction of the combustion plate 110 .

[0067] For example, refer to Figure 6 Along the length direction of the combustion plate 110 , all the second combustion holes 102 are arranged in the left area of ​​the combustion plate 110 , and all the first combustion holes 101 are arranged in the right area of ​​the combustion plate 110 .

[0068] In some other embodiments, please refer to Figure 7 and Figure 8 The combustion plate 110 includes a combustion body 111 and a fire bar 112 , the second combustion hole 102 is arranged on the combustion body 111 , and the first combustion hole 101 is arranged on the fire bar 112 .

[0069] For example, refer to Figure 6 Along the length direction of the combustion plate 110 , the combustion body 111 is arranged on the left area of ​​the combustion plate 110 , the fire bar 112 is arranged on the right area of ​​the combustion plate 110 , all the second combustion holes 102 are arranged on the combustion body 111 , and all the first combustion holes 101 are arranged on the fire bar 112 .

[0070] It should be noted that, combined with reference Figure 8The fire grate 112 has an air inlet end 112a and an air outlet end 112b. The first combustion hole 101 is disposed at the air outlet end 112b of the fire grate 112. In the first combustion mode and the second combustion mode, the air inlet end 112a of the fire grate 112 may be sealed or unsealed. When the air inlet end 112a of the fire grate 112 is sealed, in the first combustion mode, one of the combustion-supporting gas and the fuel gas is ejected from the second combustion hole 102, and the other of the combustion-supporting gas and the fuel gas is ejected from the first combustion hole 101. This is diffusion combustion, ensuring that the flame is stable during diffusion combustion. When the air inlet end 112a of the fire grate 112 is unsealed, in the first combustion mode, part of the air can enter the fire grate 112 through the air inlet end 112a of the fire grate 112. The air and the fuel gas are mixed in the fire grate 112 and then ejected from the first combustion hole 101. This realizes gas premixing during diffusion combustion, thereby improving combustion efficiency.

[0071] In the second combustion mode, regardless of whether the air inlet end 112a of the fire bar 112 is sealed, 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. At this time, the combustion plate 110 is premixed combustion, which can shorten the flame length during premixed combustion and achieve stable combustion. In addition, when the heat load demand is small, turning on the first combustion mode is not easy to cause flashback; when the heat load demand is large, turning on the second combustion mode can effectively reduce the generation of exhaust gas.

[0072] Please refer to Figure 1 and Figure 2 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.

[0073] 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.

[0074] 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 kept within a normal temperature range by heat exchange between the cooling member 120 and the combustion plate 110.

[0075] 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.

[0076] 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.

[0077] Please refer to Figure 1 and Fig. 9 , a combustion system in one embodiment includes the combustion device 100 described above.

[0078] Specifically, please refer to Figure 1 and Fig. 9 The combustion device 100 also includes an air supply device 200 and a mixing device 300. The mixing device 300 is connected to the second combustion zone. The air supply device 200 includes a first ventilation component, a second ventilation component 202 and a third ventilation component. The second ventilation component 202 and the third ventilation component are both connected to the mixing device 300. The first ventilation component is connected to the first combustion zone.

[0079] Among them, the third ventilation assembly is used to transport one of the fuel gas and the combustion-supporting gas, the first ventilation assembly and the second ventilation assembly 202 are both used to transport the other of the fuel gas and the combustion-supporting gas, and at least one of the first ventilation assembly and the second ventilation assembly 202 can be conducted.

[0080] It should be noted that the user can select to connect at least one of the first ventilation component and the second ventilation component 202 according to the heat load demand, that is, the user can select at least one corresponding channel for supplying fuel gas or combustion-supporting gas according to the heat load demand.

[0081] For example, in an embodiment where the third ventilation assembly delivers combustion-supporting gas and the first ventilation assembly and the second ventilation assembly 202 deliver fuel gas:

[0082] When the heat load is small, the first combustion mode is turned on, and only the first ventilation component is turned on. Air flows into the mixing device 300 and is ejected from the second combustion hole 102 connected to the mixing device 300 in the second combustion zone, and the gas is ejected from the first combustion hole 101 in the first combustion zone connected to the first ventilation component. After the gas and air are mixed 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.

[0083] When the heat load is large, the second combustion mode is turned on, and only the second ventilation assembly 202 is turned on, air flows into the mixing device 300, and the gas flows into the mixing device 300, the air and the gas are mixed in the mixing device 300, and are ejected from the second combustion hole 102 connected to the mixing device 300 in the second combustion zone, and the mixed gas is ignited by the ignition needle and burns in the combustion chamber of the combustion device 100, which can achieve full combustion, high combustion efficiency, and less exhaust gas.

[0084] When the first combustion mode and the second combustion mode are turned on at the same time, the first ventilation assembly and the second ventilation assembly 202 are turned on at the same time, the gas is ejected from the first combustion hole 101, and the mixture of gas and air is ejected from the second combustion hole 102. After the gas is ignited, the air in the mixture of the second combustion hole 102 can be supplemented to the gas of the first combustion hole 101, so that the gas of the first combustion hole 101 can be ignited to achieve diffusion combustion; the mixture of the second combustion hole 102 can be directly ignited, and the second combustion hole 102 achieves premixed combustion. Diffusion combustion and premixed combustion are achieved at the same time, which improves combustion efficiency, ensures stable combustion, and reduces the generation of exhaust gas.

[0085] For another example, in an embodiment where the third ventilation assembly delivers fuel gas, and the first ventilation assembly and the second ventilation assembly 202 deliver combustion-supporting gas:

[0086] When the heat load is small, the first combustion mode is turned on, and only the first ventilation component is turned on. The gas flows into the mixing device 300 and is ejected from the second combustion hole 102 connected to the mixing device 300 in the second combustion zone, and the air is ejected from the first combustion hole 101 in the first combustion zone connected to the first ventilation component. After the gas and air are mixed 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.

[0087] When the heat load is large, the second combustion mode is turned on, and only the second ventilation assembly 202 is turned on, the gas flows into the mixing device 300, and the air flows into the inside of the mixing device 300, the air and the gas are mixed in the mixing device 300, and are ejected from the second combustion hole 102 connected to the mixing device 300 in the second combustion zone, and the mixed gas is ignited by the ignition needle and burns in the combustion chamber of the combustion device 100, which can achieve full combustion, high combustion efficiency, and less exhaust gas.

[0088] When the first combustion mode and the second combustion mode are turned on at the same time, the first ventilation component and the second ventilation component 202 are turned on at the same time, air is ejected from the first combustion hole 101, and the mixture of gas and air is ejected from the second combustion hole 102. After the gas is ignited, the gas in the mixture of the second combustion hole 102 can be supplemented to the air of the first combustion hole 101, so that the gas in the first combustion hole 101 can be ignited to achieve diffusion combustion; the mixed gas in the second combustion hole 102 can be directly ignited, and the second combustion hole 102 achieves premixed combustion. Diffusion combustion and premixed combustion are achieved at the same time, which improves combustion efficiency, ensures stable combustion, and reduces the generation of exhaust gas.

[0089] Please refer to Figure 1 and Figure 2 The third ventilation component includes a first air supply member 210 , an air supply device 200 and a second air supply member, and the second air supply member is connected to the first ventilation component and / or the second ventilation component 202 .

[0090] 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.

[0091] 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.

[0092] Please refer to Figure 1 The air supply device 200 also includes a control valve 220 arranged on the second air supply part, and the control valve 220 is used to control the connection or blocking of the second air supply part and the first ventilation component and / or the second ventilation component 202; when the heat load demand is less than the preset heat load amount, the control valve 220 connects the second air supply part and the first ventilation 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 part and the second ventilation component 202.

[0093] 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 ventilation component, and the second air supply component and the second ventilation component 202 are not conducted, and the gas is input into the combustion device 100 by the first ventilation component, and the gas does not enter the mixing device 300 and is not mixed 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;

[0094] 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 part and the second ventilation component 202, and the second air supply part and the first ventilation component are not connected, and the gas is input into the mixing device 300 from the second ventilation 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.

[0095] 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.

[0096] 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.

[0097] In this embodiment, the preset percentage is preferably 10%-30%, that is, the preset heat load is preferably any value in the range of the total heat load of the combustion system or gas equipment * 10% to the total heat load of the combustion system or gas equipment * 30%, and the preset heat load is preferably the total heat load of the combustion system or gas equipment * 20%. In other embodiments, the preset heat load can be any other value.

[0098] 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.

[0099] Specifically, please refer to Figure 1 and Figure 2 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 outlet end of the second mixer 320 is connected to the second combustion zone, the inlet end of the second mixer 320 is connected to the outlet end 313 of the first mixer 310, the second ventilation assembly 202 and the third ventilation assembly are both connected to the inlet end of the first mixer 310, and the first mixer 310 is a Venturi structure.

[0100] It should be noted that the first mixer 310 is a Venturi structure, and its use principle is similar to that of a Venturi tube. For example, 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 a negative pressure is generated. 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.

[0101] 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.

[0102] Please refer to Figure 1 The first ventilation assembly includes a first air inlet 201 and a distribution unit 400. The first air inlet 201 is connected to the second air supply member. One end of the first air inlet 201 is connected to the second air supply member 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 gas supplied by the second air supply member can be input into the distribution unit 400 through the first air inlet 201 and diverted to the first combustion zone through the distribution unit 400.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] Please refer to Figure 1 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 .

[0108] It can be understood that the gas supplied by the second 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 more uniform distribution of the gas.

[0109] 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.

[0110] In one embodiment, please refer to Figure 3 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.

[0111] 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.

[0112] In another embodiment, please refer to Figure 3 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.

[0113] For further information, please refer to Figure 2 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.

[0114] Please refer to Figure 1 , the gas equipment in one embodiment includes the above-mentioned combustion system.

[0115] 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.

[0116] In the above-mentioned gas equipment, the 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 backfire 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.

[0117] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The above-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, the combustion plate (110) has a first combustion mode and / or a second combustion mode. In the first combustion mode, one of the fuel gas and the combustion-supporting gas is outputted from the first combustion hole (101), and the other of the fuel gas and the combustion-supporting gas is outputted from the second combustion hole (102); in the second combustion mode, a mixture of the fuel gas and the combustion-supporting gas is outputted from the second combustion hole (102) or the first combustion hole (101).

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 same direction.

5. The combustion plate (110) according to claim 3, characterized in that: The first combustion holes (101) and the second combustion holes (102) are arranged alternately along the length direction and / or the width direction of the combustion plate (110).

6. 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 arranged in partitions along the same direction.

7. The combustion plate (110) according to claim 6, characterized in that The first combustion holes (101) and the second combustion holes (102) are arranged in partitions along the length direction and / or the width direction of the combustion plate (110).

8. The combustion plate (110) according to claim 1, characterized in that: The combustion plate (110) comprises a combustion body (111) and a fire bar (112); the second combustion hole (102) is arranged on the combustion body (111); and the first combustion hole (101) is arranged on the fire bar (112).

9. 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 8, 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).

10. The combustion device (100) according to claim 9, 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).

11. The combustion device (100) according to claim 10, characterized in that: 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 element (120) is provided between adjacent sub-combustion zones.

12. A combustion system, characterized in that: It comprises the combustion device (100) according to any one of claims 9 to 11.

13. The combustion system according to claim 12, characterized in that: Also includes: a mixing device (300) in communication with the second combustion zone; An air supply device (200) comprises a first ventilation component, a second ventilation component (202) and a third ventilation component, wherein the second ventilation component (202) and the third ventilation component are both connected to the mixing device (300), and the first ventilation component is connected to the first combustion zone; The third ventilation assembly is used to transport one of the fuel gas and the combustion-supporting gas, the first ventilation assembly and the second ventilation assembly (202) are both used to transport the other of the fuel gas and the combustion-supporting gas, and at least one of the first ventilation assembly and the second ventilation assembly (202) can be conducted.

14. The combustion system according to claim 13, characterized in that: The third ventilation component comprises a first air supply component (210), and the air supply device (200) comprises a second air supply component, wherein the second air supply component can be in communication with the first ventilation component and / or the second ventilation component (202).

15. The combustion system according to claim 14, 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 ventilation component and / or the second ventilation 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 ventilation 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 ventilation component (202).

16. The combustion system according to claim 14, 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); an air outlet end of the second mixer (320) is connected to the second combustion zone; an air inlet end of the second mixer (320) is connected to an air outlet end (313) of the first mixer (310); the second ventilation component (202) and the third ventilation component are both connected to the air inlet end of the first mixer (310); and the first mixer (310) is a Venturi structure.

17. The combustion system according to claim 16, characterized in that The first ventilation component comprises a first air inlet (201) and a distribution unit (400), one end of the first air inlet (201) is connected to the second air supply part 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.

18. The combustion system according to claim 17, 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.

19. The combustion system according to claim 18, 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).

20. The combustion system according to claim 18, 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 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).

21. The combustion system according to claim 20, 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.

22. The combustion system according to claim 20, 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).

23. The combustion system according to claim 21 or 22, 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).

24. A gas equipment, characterized in that: Comprising a combustion system as claimed in any one of claims 12-23.

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