Gas mixing structure and combustion equipment

Abstract

The invention relates to a gas mixing structure and combustion equipment, and the gas mixing structure comprises a gas mixing shell which is provided with a gas mixing channel, a first gas inlet and a gas outlet, and the first gas inlet and the gas outlet are both located in the gas mixing channel and are arranged at intervals in the first direction; and at least part of the gas inlet piece extends into the mixed gas inlet channel, a second gas inlet is formed in the part, extending into the mixed gas inlet channel, of the gas inlet piece, and the second gas inlet is located in the side, facing the gas outlet in the first direction, of the gas inlet piece. Due to the fact that the second gas outlet is formed in the side, facing the gas outlet, of the gas inlet piece in the first direction, the combustion-supporting gas is prevented from entering the second gas inlet to cause backflow of the combustible gas, and meanwhile the combustible gas can be fully mixed with the decelerated and diffused combustion-supporting gas to form mixed gas; the mixed gas can be fully combusted after entering the combustor through the gas outlet, so that the combustion efficiency of the combustor is improved, and pollutants discharged by combustion of combustible gas are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of gas water heaters, and particularly to a gas mixing structure and a combustion device. Background Art

[0002] A gas water heater uses gas as an energy source, heats water by the heat generated by gas combustion, and makes the water temperature meet the requirements of life, heating, production processes, etc. In order to achieve better combustion effect of the gas water heater, the air and gas for combustion on the burner generally need to be mixed first and then flow to the burner.

[0003] In existing gas water heaters, gas and air usually rely only on their own diffusion for mixing, with poor mixing effect, and it is impossible to ensure uniform mixing of air and gas. Especially when the flow rates of air and gas are relatively large, there will be a situation where some air and gas enter the burner directly without being mixed, resulting in a reduction in the combustion efficiency of the burner. Summary of the Invention

[0004] Based on this, in view of the problem of poor mixing effect of gas and air in existing gas water heaters, it is necessary to provide a gas mixing structure and a combustion device.

[0005] A gas mixing structure includes:

[0006] A gas mixing housing, which is provided with a gas mixing channel, a first air inlet and an air outlet. The first air inlet and the air outlet are both located in the gas mixing channel and are arranged at intervals along a first direction.

[0007] An air inlet member, at least a part of which extends into the gas mixing channel. The part of the air inlet member extending into the gas mixing channel is located between the first air inlet and the air outlet, and a second air inlet is provided on the part of the air inlet member extending into the gas mixing channel. The second air inlet is located on the side of the air inlet member facing the air outlet in the first direction.

[0008] In one embodiment, the second air inlet includes a plurality of second air inlets, and the plurality of second air inlets are arranged at intervals on the same side of the air inlet member.

[0009] In one embodiment, the air inlet member includes an air outlet arc surface protruding towards the air outlet, and all the second air inlets are located on the air outlet arc surface.

[0010] In one embodiment, all the second air inlets are spirally distributed on the air outlet arc surface.

[0011] In one embodiment, the air inlet member further includes a blocking arc surface protruding towards the first air inlet.

[0012] In one embodiment, the air inlet member includes a fixed base and an air inlet pipe connected to each other. One end of the air inlet pipe extends into the air mixing channel and is provided with the second air inlet.

[0013] In one embodiment, the air inlet pipe is cylindrical.

[0014] In one embodiment, the first air inlet is used to input combustible gas, and the second air inlet is used to input combustion-supporting gas.

[0015] In one embodiment, the air mixing housing is further provided with a diffusion chamber, and the diffusion chamber is communicated with the air outlet.

[0016] A combustion device includes the air mixing structure as described in any one of the above.

[0017] In the above air mixing structure, part of the air inlet member is arranged between the first air inlet and the air outlet, so that after the combustion-supporting gas is input from the first air inlet, the combustion-supporting gas will pass by the side of the air inlet member far from the air outlet during the movement towards the air outlet, and thus is blocked by the air inlet member, causing the combustion-supporting gas to diffuse towards both sides of the air inlet member. At this time, if the combustible gas is also input from the second air inlet on the air inlet member, the combustible gas will be fully mixed with the combustion-supporting gas that has been decelerated and diffused to form a mixed gas. The mixed gas can be fully burned after passing through the air outlet and entering the burner, so as to improve the combustion efficiency of the burner and reduce the pollutants emitted by the combustion of the combustible gas.

[0018] Among them, since the second air outlet is arranged on the side of the air inlet member facing the air outlet in the first direction, when the combustible gas is output from the second air outlet, the combustible gas will directly move towards the air outlet, avoiding the combustible gas entering the first air outlet along the air mixing channel and finally entering the blowing equipment such as a blower along the first air outlet, causing potential safety hazards.

[0019] At the same time, by arranging the second air outlet on the side of the air inlet member facing the air outlet in the first direction, the combustion-supporting gas input from the first air inlet will contact the closed side of the air inlet member, enabling the air inlet member to both decelerate and diffuse the combustion-supporting gas and avoiding the combustion-supporting gas entering the second air inlet and causing the backflow of the combustible gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a gas device in some embodiments of the present application.

[0021] Figure 2 It is a schematic structural diagram of an air mixing structure in some embodiments of the present application.

[0022] Figure 3 For Figure 2 the front view of the air inlet member of the air mixing structure in

[0023] Figure 4 For Figure 2 The side view of the intake part of the gas mixing structure in

[0024] Figure 5 For Figure 2 The top view of the intake part of the gas mixing structure in

[0025] Explanation of the reference numerals in the drawings:

[0026] Gas mixing structure 100;

[0027] Gas mixing housing 110; gas mixing channel 111; first intake port 112; outlet port 113; diffusion chamber 114;

[0028] Intake part 120; second intake port 121; outlet arc surface 122; blocking arc surface 123; fixed base 124; intake pipe 125; threaded hole 126;

[0029] Burner 130; cold water pipe 140; fan 150;

[0030] First direction X. Detailed implementation manners

[0031] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand 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 departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0033] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In the present application, unless otherwise clearly defined and limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be 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, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of illustration and do not represent the only implementation.

[0037] Refer to Figure 1 and Figure 2 , Figure 1 shows a schematic structural diagram of a gas device in an embodiment of the present application, Figure 2 shows Figure 1Schematic diagram of the gas mixing structure 100 of a gas device. A gas device provided by an embodiment of the present application mainly includes a burner 130 and a gas mixing structure 100. The gas mixing structure 100 is in communication with the intake part of the burner 130. Combustible gas passes through the gas mixing structure 100 and mixes with combustion-supporting gas to form a mixed gas. The mixed gas is input into the intake part of the burner 130 through the gas mixing structure 100 and finally burns in the burner 130 to release heat.

[0038] Among them, the gas mixing structure 100 is mainly used to ensure that the combustible gas and the combustion-supporting gas can be fully mixed, so that the combustible gas does not flash back or blow off during the combustion process of the burner 130, thereby improving the combustion efficiency of the combustible gas in the burner 130.

[0039] For this reason, the gas mixing structure 100 includes a gas mixing housing 110 and an intake member 120. The gas mixing housing 110 is provided with a gas mixing channel 111, a first intake port 112 and an outlet port 113. The first intake port 112 and the outlet port 113 are both located in the gas mixing channel 111 along the gas mixing channel 111 and are arranged at intervals along the first direction X. When gas is input through the first intake port 112, the gas will move along the first direction X to the outlet port 113, thereby forming an air flow moving along the first direction X.

[0040] Refer to Figure 3 、 Figure 4 and Figure 5 , the intake member 120 can be installed on the gas mixing housing 110 or on other structures of the combustion device. After the intake member 120 is installed, at least part of the intake member 120 can extend into the gas mixing channel 111, and the part of the intake member 120 extending into the gas mixing channel 111 is located between the first intake port 112 and the outlet port 113. At the same time, a second intake port 121 is opened on the part of the intake member 120 extending into the gas mixing channel 111. The second intake port 121 is located on the side of the intake member 120 facing the outlet port 113 in the first direction X.

[0041] That is to say, a second intake port 121 is provided between the first intake port 112 and the outlet port 113 through the intake member 120. When gas is also input through the second intake port 121, the gas input through the second intake port 121 will mix with the gas input through the first intake port 112 to form a mixed gas. The outlet port 113 is in communication with the intake part of the burner 130, so that the mixed gas can finally enter the burner 130 from the outlet port 113 for combustion.

[0042] It should be noted that the first direction X can be the longitudinal extension direction of the gas mixing channel 111, such as Figure 1In the embodiment, the first air inlet 112 and the air outlet 113 are respectively arranged at two ends of the gas mixing channel 111 in the longitudinal direction. In other embodiments, if the first air inlet 112 and the air outlet 113 are not arranged at intervals along the longitudinal direction of the mixing channel 111, the first direction X is only the interval direction between the first air inlet 112 and the air outlet 113, and has nothing to do with the extending direction of the mixing channel 111.

[0043] Among them, according to the use requirements, one of the first air inlet 112 and the second air inlet 121 can be selected to input the combustible gas, and the other is used to input the combustion-supporting gas. The combustible gas can be gas, etc., and the combustion-supporting gas can be air or pure oxygen, etc. For the convenience of description, in the following embodiments, it is taken as an example that the first air inlet 112 is used to input the combustion-supporting gas and the second air inlet 121 is used to input the combustible gas for description.

[0044] And a part of the air inlet member 120 is arranged between the first air inlet 112 and the air outlet 113, so that after the first air inlet 112 inputs the combustion-supporting gas, the combustion-supporting gas will pass through the side of the air inlet member 120 away from the air outlet 113 during the movement towards the air outlet 113, and thus is blocked by the air inlet member 120, causing the combustion-supporting gas to diffuse towards both sides of the air inlet member 120. At this time, if the second air inlet 121 on the air inlet member 120 also inputs the combustible gas at the same time, the combustible gas will be fully mixed with the decelerated and diffused combustion-supporting gas to form a mixed gas. The mixed gas can be fully burned after entering the burner 130 through the air outlet 113, so as to improve the combustion efficiency of the burner 130 and reduce the pollutants emitted by the combustion of the combustible gas.

[0045] Among them, since the second air outlet 113 is arranged on the side of the air inlet member 120 facing the air outlet 113 in the first direction X, when the combustible gas is output from the second air outlet 113, the combustible gas will directly move towards the air outlet 113, avoiding the combustible gas entering the first air outlet 113 along the gas mixing channel 111 and finally entering the blowing equipment such as the blower 150 along the first air outlet 113, causing potential safety hazards.

[0046] At the same time, the second air outlet 113 is arranged on the side of the air inlet member 120 facing the air outlet 113 in the first direction X, and the combustion-supporting gas input by the first air inlet 112 will contact the closed side of the air inlet member 120, so that the air inlet member 120 can both decelerate and diffuse the combustion-supporting gas and avoid the combustion-supporting gas entering the second air inlet 121, causing the backflow of the combustible gas.

[0047] Optionally, in order to enable the intake member 120 to extend into the air-fuel mixing channel 111, an installation port communicating with the air-fuel mixing channel 111 is provided on the outer part of the air-fuel mixing housing 110, and the intake member 120 extends into the air-fuel mixing channel 111 through the installation port. In other embodiments, the intake member 120 can also extend into the air-fuel mixing channel 111 through the first intake port 112 or the outlet port 113.

[0048] In some embodiments of the present application, the second intake ports 121 include a plurality of them, and the plurality of second intake ports 121 are spaced apart and arranged on the same side of the intake member 120, that is, a plurality of second intake ports 121 are provided on the side of the intake member 120 facing the outlet port 113. In this way, the combustible gas input into the intake member 120 will be divided into multiple airflows within the intake member 120 and respectively input into the air-fuel mixing channel 111 through the plurality of second intake ports 121. Dividing the combustible gas into multiple strands can further improve the mixing uniformity of the combustible gas and the combustion-supporting gas in the air-fuel mixing channel 111, and finally improve the combustion efficiency of the burner 130 and reduce the pollutants emitted by the combustion of the combustible gas.

[0049] In some embodiments, the intake member 120 includes an outlet arc surface 122 protruding towards the outlet port 113, and all the second intake ports 121 are located on the outlet arc surface 122. In this way, the orientations of different second intake ports 121 at different positions on the outlet arc surface 122 are all different, so that the multiple airflows formed by the combustible gas passing through the plurality of second intake ports 121 can flow in different directions. After the airflows of the combustible gas in different directions encounter the combustion-supporting gas in the air-fuel mixing channel 111, they can further mix fully with the combustion-supporting gas, improving the mixing uniformity of the combustible gas and the combustion-supporting gas.

[0050] In the actual use process, if the number of second intake ports 121 at a certain place on the outlet arc surface 122 is large, it will cause a high concentration of combustible gas at that place, and finally the concentration of the formed mixed gas will be uneven. For this reason, specifically in some embodiments, all the second intake ports 121 are spirally distributed on the outlet arc surface 122, so that the second intake ports 121 are evenly arranged in both the circumferential and axial directions of the outlet arc surface 122, finally forming a variable cross-section effect, which not only makes the contact between the combustible gas and the combustion-supporting gas more sufficient, but also makes the mixing ratio of the mixed gas formed by the combustible gas and the combustion-supporting gas more uniform.

[0051] Among them, according to the radius of the outlet arc surface 122, the helix angle of the helix formed by all the second intake ports 121, and the pitch of the helix, the flow direction of the airflow formed by the combustible gas is different, the disturbance effect of the combustible gas on the combustion-supporting gas is different, and the mixing effect of the combustible gas and the combustion-supporting gas is different.

[0052] Based on this, after determining the radius of the gas outlet arc surface 122, simulation can be carried out for different helix angles and pitches to confirm the influence of different helix angles and pitches on the mixing effect of combustible gas and combustion-supporting gas. Specifically in some embodiments, the radius of the gas outlet arc surface 122 is 5 mm, the helix angle of the helix formed by all the second air inlets 121 is 30°, and the pitch of the helix is 40 mm.

[0053] In some embodiments of the present application, the air inlet member 120 further includes a blocking arc surface 123 protruding towards the first air inlet 112. The combustion-supporting gas input from the first air inlet 112 will be blocked by the blocking arc surface 123 when passing through the air inlet member 120, which plays a role in slowing down the flow rate of the combustible gas and disturbing the combustible gas. When the combustion-supporting gas passes through the blocking arc surface 123, under the effect of the blocking arc surface 123, it can pass through the blocking arc surface 123 more smoothly, ensuring both the deceleration and diffusion effects and avoiding too strong a blocking effect on the combustion-supporting gas, resulting in poor circulation of the combustion-supporting gas.

[0054] In some embodiments of the present application, the air inlet member 120 includes a fixed base 124 and an air inlet pipe 125 connected to each other. The fixed base 124 is used to be fixed on the mixing gas housing 110 or other structures of the gas equipment, so as to fix the air inlet pipe 125 through the fixed base 124. One end of the air inlet pipe 125 is connected to the fixed base 124, and the other end of the fixed pipe extends into the mixing gas channel 111 and is provided with a second air inlet 121.

[0055] Furthermore, threaded holes 126 are provided on both sides of the fixed base 124. During actual use, the fixed base 124 can be fixed on the mixing gas housing 110 through fasteners such as bolts. The bolt holes can not only play a role in fixing but also be used for positioning the fixed base 124.

[0056] In some embodiments, the air inlet pipe 125 is cylindrical. In this way, with the diameter perpendicular to the first direction X of the air inlet pipe 125 as the dividing line, the air inlet pipe 125 is divided into two sides opposite to each other in the first direction X, and the outer surface of the air inlet pipe 125 is divided to form two arc surfaces. The arc surface on the side close to the air outlet 113 is the gas outlet arc surface 122, and a second air outlet 113 is provided on the side of the air inlet pipe 125 close to the air outlet 113. The arc surface on the side of the air inlet pipe 125 close to the first air inlet 112 is the blocking arc surface 123, and the blocking arc surface 123 is closed.

[0057] It can be understood that in other embodiments, the air inlet pipe 125 can also be a square pipe. When the air inlet pipe 125 is a square pipe, the plane of the air inlet pipe 125 provided with the second air outlet 113 is a plane, and the surface of the air inlet pipe 125 in contact with the combustion-supporting gas is also a plane.

[0058] In some embodiments of the present application, in order to further improve the mixing uniformity of the combustible gas and the combustion-supporting gas in the gas mixing structure 100, the gas mixing housing 110 is further provided with a diffusion chamber 114. The diffusion chamber 114 is communicated with the air outlet 113, and the diffusion chamber 114 is also communicated with the intake part of the burner 130.

[0059] In this way, the combustion-supporting gas and the combustible gas will be mixed in the gas mixing pipeline to form a mixed gas. After the mixed gas enters the diffusion chamber 114, it will diffuse along the diffusion chamber 114. Through the diffusion method, the combustion-supporting gas and the combustible gas in the mixed gas will be further mixed. Therefore, before the mixed gas enters the burner 130 for combustion, the combustion-supporting gas and the combustible gas can be further fully mixed and homogenized through the diffusion chamber 114, ultimately achieving the effects of improving the gas combustion efficiency, overall reliability, reducing emissions, and reducing the volume of the combustion equipment.

[0060] During the actual use process, the size of the diffusion chamber 114 can be much larger than the size of the intake port, so that the mixed gas input into the intake port can have sufficient volume in the diffusion chamber 114 for diffusion, and finally the combustion-supporting gas and the combustible gas can be fully mixed and homogenized.

[0061] In some embodiments of the present application, the above-mentioned combustion equipment is a gas water heater. The gas water heater further includes a cold water pipe 140. The cold water pipe 140 passes through the burner 130. The mixed gas burns in the burner 130 to release heat. When the cold water in the cold water pipe 140 passes through the burner 130, it will absorb heat to increase the water temperature in the cold water pipe 140, and finally achieve the effect of outputting hot water.

[0062] It should be noted that in other embodiments, the above-mentioned combustion equipment can also be a gas wall-mounted boiler, a gas stove, or other equipment that needs to use gas for combustion, which is not limited herein.

[0063] The above gas mixing structure 100 has at least the following advantages:

[0064] Part of the intake member 120 is arranged between the first intake port 112 and the air outlet 113, so that after the first intake port 112 inputs the combustion-supporting gas, the combustion-supporting gas will pass through the side of the intake member 120 away from the air outlet 113 during the movement towards the air outlet 113, and thus be blocked by the intake member 120, causing the combustion-supporting gas to diffuse towards both sides of the intake member 120. At this time, if the second intake port 121 on the intake member 120 also inputs the combustible gas at the same time, the combustible gas will be fully mixed with the decelerated and diffused combustion-supporting gas to form a mixed gas. The mixed gas can be fully combusted after passing through the air outlet 113 and entering the burner 130, so as to improve the combustion efficiency of the burner 130 and reduce the pollutants emitted by the combustion of the combustible gas.

[0065] Among them, since the second air outlet 113 is arranged on the side of the air inlet member 120 facing the air outlet 113 in the first direction X, when the combustible gas is output from the second air outlet 113, the combustible gas will directly move towards the air outlet 113, avoiding the combustible gas entering the first air outlet 113 along the air mixing channel 111 and finally entering the blower equipment such as the blower 150 along the first air outlet 113, thus causing potential safety hazards.

[0066] At the same time, by arranging the second air outlet 113 on the side of the air inlet member 120 facing the air outlet 113 in the first direction X, the combustion-supporting gas input from the first air inlet 112 will contact the closed side of the air inlet member 120, enabling the air inlet member 120 to both decelerate and disperse the combustion-supporting gas and avoid the combustion-supporting gas entering the second air inlet 121, resulting in the backflow of the combustible gas.

[0067] The air inlet member 120 includes an air outlet arc surface 122 protruding towards the air outlet 113, and all the second air inlets 121 are located on the air outlet arc surface 122. In this way, the orientations of different second air inlets 121 at different positions on the air outlet arc surface 122 are all different, so that the multi-strand airflows of the combustible gas formed by passing through the multiple second air inlets 121 can flow in different directions. After the airflows of the combustible gas in different directions encounter the combustion-supporting gas in the air mixing channel 111, they can further mix fully with the combustion-supporting gas, improving the uniformity of the mixing of the combustible gas and the combustion-supporting gas.

[0068] Moreover, all the second air inlets 121 are spirally distributed on the air outlet arc surface 122, so that the second air inlets 121 are evenly arranged in both the circumferential and axial directions of the air outlet arc surface 122, finally forming a variable cross-section effect, which not only makes the contact between the combustible gas and the combustion-supporting gas more sufficient, but also makes the mixing ratio of the mixed gas formed by the combustible gas and the combustion-supporting gas more uniform.

[0069] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0070] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A gas mixing structure, characterized in that, The gas mixing structure includes: A gas mixing housing (110) is provided with a gas mixing channel (111), a first air inlet (112) and an air outlet (113). The first air inlet (112) and the air outlet (113) are both located in the gas mixing channel (111) and are arranged at intervals along a first direction (X). An air inlet member (120) at least partially extends into the gas mixing channel (111). The part of the air inlet member (120) extending into the gas mixing channel (111) is located between the first air inlet (112) and the air outlet (113). And the part of the air inlet member (120) extending into the gas mixing channel (111) is provided with a second air inlet (121). The second air inlet (121) is located on the side of the air inlet member (120) facing the air outlet (113) in the first direction (X).

2. The gas mixing structure according to claim 1, wherein, The second air inlet (121) includes a plurality of them, and the plurality of second air inlets (121) are arranged at intervals on the same side of the air inlet member (120).

3. The gas mixing structure according to claim 2, characterized in that, The air inlet member (120) includes an air outlet arc surface (122) protruding towards the air outlet (113), and all the second air inlets (121) are located on the air outlet arc surface (122).

4. The gas mixing structure according to claim 3, wherein All the second air inlets (121) are spirally distributed on the air outlet arc surface (122).

5. The gas mixing structure according to claim 1, wherein The air inlet member (120) further includes a blocking arc surface (123) protruding towards the first air inlet (112).

6. The gas mixing structure according to claim 1, characterized in that, The air inlet member (120) includes a fixed base (124) and an air inlet pipe (125) connected to each other. One end of the air inlet pipe (125) extends into the gas mixing channel (111) and is provided with the second air inlet (121).

7. The gas mixing structure according to claim 6, wherein The air inlet pipe (125) is cylindrical.

8. The gas mixing structure according to claim 1, wherein The first air inlet (112) is used to input combustible gas, and the second air inlet (121) is used to input combustion-supporting gas.

9. The gas mixing structure according to claim 1, characterized in that The gas mixing housing (110) is further provided with a diffusion chamber (114), and the diffusion chamber (114) is communicated with the air outlet (113).

10. A combustion device, characterized in that, Including the gas mixing structure (100) according to any one of claims 1-9.

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