Ejecting system and combustor

Abstract

The utility model relates to the field of kitchen utensils, in particular to an injection system and a burner, the injection system comprises an injection pipe, a gas nozzle and an air door structure, and the gas nozzle is arranged towards a gas inlet of the injection pipe; the air door structure comprises a baffle arranged around the gas nozzle, an air inlet is formed in the baffle, and the baffle can be rotated to adjust the opening degree of the air inlet. According to the injection system, the baffle is arranged around the gas nozzle, the amount of primary air entering from the circumferential direction of the injection pipe can be adjusted by adjusting the opening degree of the air inlet of the baffle, the adjustment amplitude is easier to grasp through rotary adjustment, and therefore fine adjustment of the opening degree of the air door is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of kitchen utensils, in particular to a kind of injection system and combustor. BACKGROUND

[0002] The existing combustor is mixed with oxygen and gas for the first time by high-speed gas ejected from the nozzle to inject the surrounding low-speed air. The flow of primary air is adjusted by adjusting the relative distance between the damper blade and the end face of the injection pipe. Generally, stronger primary injection capacity is conducive to efficient combustion.

[0003] Especially for the combustor with multiple gas nozzles on the outer ring injection pipe, the multi-injection has strong injection capacity, and the speed momentum of the primary air sucked is larger. Fine adjustment of the damper opening degree will cause a large change in the flow of primary air, resulting in poor adjustment of the combustion condition. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of overcoming the defect that the damper opening degree is not easy to adjust in the prior art, and provides an injection system and a combustor.

[0005] The utility model solves the above technical problems by the following technical solutions:

[0006] An injection system includes an injection pipe, a gas nozzle and a damper structure,

[0007] The gas nozzle is arranged towards the air inlet of the injection pipe.

[0008] The damper structure includes a baffle arranged around the gas nozzle, the baffle is provided with an air inlet, and the baffle can be rotated to adjust the opening degree of the air inlet.

[0009] In the scheme, the injection system is provided with a baffle around the gas nozzle. By adjusting the opening degree of the air inlet of the baffle, the amount of primary air entering from the circumference of the injection pipe can be adjusted, and the adjustment range can be easily grasped by rotation adjustment, so as to realize fine adjustment of the damper opening degree.

[0010] Preferably, the end face of the baffle close to the injection pipe is separated from the inlet end of the absorption section of the injection pipe by a predetermined distance.

[0011] In the scheme, the baffle is separated from the inlet end of the absorption section of the injection pipe by a predetermined distance, so that even if the air inlet is adjusted to be completely closed, the injection pipe can still suck primary air, providing air guarantee for successful ignition of the combustor.

[0012] Preferably, the damper structure further includes a support member connected to the nozzle. The end of the support member facing the ejector tube is provided with a plurality of circumferentially spaced protrusions. The baffle is arranged around the protrusions. The air inlet is arranged corresponding to the protrusions. The baffle can be rotated to adjust the overlap between the air inlet and the protrusions.

[0013] In this solution, the opening of the air inlet is adjusted by the degree of overlap between the air inlet and the protrusion. This adjustment method can be achieved with a relatively simple structure, thereby reducing the total manufacturing cost of the ejector system.

[0014] Preferably, the damper structure further includes a bracket, which connects the supporting member and the ejector tube respectively.

[0015] In this design, a bracket is used to connect the support components and the ejector tube, thereby ensuring that the damper structure can be reliably fixed to the ejector tube.

[0016] Preferably, the support member includes a connecting tube and a kit, the kit being fitted onto the end of the connecting tube near the ejector tube, the protrusion being provided on the end face of the kit facing the ejector tube, and the nozzle being connected to the end of the connecting tube near the ejector tube.

[0017] Preferably, the support member further includes an elastic element that presses the kit in the direction toward the ejector tube, the kit being threadedly connected to the connecting tube.

[0018] In this solution, by setting the elastic element of the pressing kit, the kit threaded to the connecting pipe can be limited to prevent it from loosening and displacing.

[0019] Preferably, the baffle is a ring-shaped structure and has multiple air inlets spaced apart circumferentially, and the outer circumferential surface of the baffle is also provided with an operating handle.

[0020] In this design, the baffle can be easily rotated by setting an operating handle, thereby adjusting the opening of the air inlet.

[0021] Preferably, the end of the protrusion facing the ejector tube is provided with a circumferentially outwardly protruding limiting portion, and the baffle is limited between the end face of the kit facing the ejector tube and the limiting portion.

[0022] In this design, the baffle is confined between the end face of the ejector tube and the limiting part, so that the baffle will not detach from the connecting tube when it is rotated.

[0023] Preferably, one ejector tube corresponds to multiple gas nozzles.

[0024] In this design, the ejector tube equipped with multiple gas nozzles has a stronger ejection capability and a greater velocity momentum of the entrained primary air. The fine adjustment of the air inlet opening achieved by rotation further improves this ejector system.

[0025] A burner comprising the ejector system described above.

[0026] In this design, the burner's ejector system has a baffle around the gas nozzle. By adjusting the opening of the baffle's air inlet, the amount of primary air entering from the circumference of the ejector tube can be adjusted. Furthermore, the adjustment range is easier to control through rotation, thus enabling fine-tuning of the damper opening.

[0027] The significant advantages of this invention are as follows: the ejector system has a baffle around the gas nozzle. By adjusting the opening of the baffle's air inlet, the amount of primary air entering circumferentially from the ejector tube can be adjusted. Furthermore, the adjustment range is easier to control through rotation, thus enabling fine-tuning of the damper opening. Burners equipped with this ejector system achieve the same effects. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural schematic diagram of an ejector system according to an embodiment of the present invention.

[0029] Figure 2 This is a top view of an ejector system according to an embodiment of the present invention.

[0030] Figure 3 This is a side view of an ejector system according to an embodiment of the present invention.

[0031] Figure 4 For along Figure 3 A schematic diagram of the cross-sectional structure of the ejector system taken from the AA line.

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of a support member according to an embodiment of the present invention.

[0033] Figure 6 This is a three-dimensional structural diagram of a support member according to an embodiment of the present invention.

[0034] Figure 7 This is a schematic diagram of the cross-sectional structure of an ejector tube according to an embodiment of the present invention.

[0035] Figure 8 This is a first comparison diagram of the fluid flow state in the ejector tube of the present invention, simulated using simulation software, and the fluid flow state in the ejector tube of the present invention.

[0036] Figure 9This is a second comparative diagram showing the flow state of fluid inside the ejector tube of the present invention, simulated using simulation software, and the flow state of fluid inside the ejector tube of the present invention.

[0037] Figure 10 This is a third comparative diagram showing the flow state of fluid inside the ejector tube of the present invention, simulated using simulation software, and the flow state of fluid inside the ejector tube of the present invention.

[0038] Explanation of reference numerals in the attached drawings: Ejector system 100; Ejector tube 110; Straight pipe section 111; Absorption section 112; Inlet end 1121; Gas nozzle 120; Damper structure 130; Baffle 131; Operating handle 1311; Air inlet 1312; Support member 132; Connecting pipe 1321; Kit 1322; Protrusion 1323; Limiting part 1325; Elastic element 1327; Bracket 133. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments, but the present invention is not limited to the scope of the embodiments described herein.

[0040] like Figures 1-7 As shown, this embodiment provides an ejector system 100, which includes an ejector tube 110, a gas nozzle 120, and a damper structure 130.

[0041] The gas nozzle 120 is positioned toward the air inlet of the ejector tube 110; the damper structure 130 includes a baffle 131 surrounding the gas nozzle 120, and an air inlet 1312 is provided on the baffle 131. The baffle 131 can be rotated to adjust the opening of the air inlet 1312.

[0042] The ejector system 100 is provided with a baffle 131 around the gas nozzle 120. By adjusting the opening of the air inlet 1312 of the baffle 131, the amount of primary air entering from the circumference of the nozzle can be adjusted. Moreover, the adjustment range is easier to control by rotating the baffle, thereby enabling fine adjustment of the damper opening.

[0043] The end face of the baffle 131 near the ejector tube 110 is separated from the inlet end 1121 of the absorption section 112 of the ejector tube 110 by a predetermined distance. The predetermined distance between the baffle 131 and the inlet end 1121 of the absorption section 112 of the ejector tube 110 ensures that even if the air inlet 1312 is adjusted to be completely closed, the ejector tube 110 can still draw in primary air, providing air guarantee for successful burner ignition.

[0044] In this embodiment, the damper structure 130 further includes a support member 132, which is connected to the nozzle. The end of the support member 132 facing the ejector tube 110 is provided with a plurality of protrusions 1323 spaced circumferentially around the axis of the gas nozzle 120. A baffle 131 is provided around the protrusions 1323, and an air inlet 1312 is provided corresponding to the protrusions 1323. The baffle 131 can be rotated to adjust the overlap between the air inlet 1312 and the protrusions 1323.

[0045] The opening of the air inlet 1312 can be adjusted by the degree of overlap between the air inlet 1312 and the protrusion 1323. This adjustment method can be achieved with a relatively simple structure, thereby reducing the total manufacturing cost of the ejector system 100.

[0046] In other embodiments, a sliding plate can be provided on the air inlet 1312 of the baffle 131 to adjust the opening of the air inlet 1312. Those skilled in the art can also use other existing structures that can adjust the opening of the air inlet 1312 as needed.

[0047] The damper structure 130 also includes a bracket 133, which is connected to the support member 132 and the ejector tube 110 respectively.

[0048] By designing a bracket 133 to connect the support member 132 and the ejector tube 110, the damper structure 130 can be reliably fixed to the ejector tube 110.

[0049] The support member 132 includes a connecting pipe 1321 and a fitting 1322. The fitting 1322 is sleeved on the end of the connecting pipe 1321 near the ejector tube 110. The end face of the fitting 1322 facing the ejector tube 110 is provided with a protrusion 1323. The nozzle is connected to the end of the connecting pipe 1321 near the ejector tube 110.

[0050] The support member 132 also includes an elastic element 1327, which presses the kit 1322 in the direction toward the ejector tube 110. The kit 1322 is threaded to the connecting tube 1321.

[0051] By setting the elastic element 1327 of the pressing kit 1322, the kit 1322 threaded to the connecting pipe 1321 can be limited to prevent it from loosening and displacing.

[0052] In this embodiment, the elastic element 1327 is a spring. The spring is sleeved on the connecting tube 1321 and abuts against the end face of the kit 1322 away from the ejector tube 110, and is in a compressed state.

[0053] In other embodiments, the elastic element 1327 may also employ other existing structures.

[0054] One end of the kit 1322 is closed and a hole is opened in the center to connect to the gas nozzle 120, and the other end of the kit 1322 is connected to the gas inlet pipe.

[0055] The baffle 131 has a ring-shaped structure and multiple air inlets 1312 are arranged at intervals around the periphery. The outer periphery of the baffle 131 is also provided with an operating handle 1311.

[0056] By setting the operating handle 1311, the baffle 131 can be rotated conveniently, thereby adjusting the opening of the air inlet 1312.

[0057] Alternatively, the operating handle 1311 may not be provided; instead, the baffle 131 may be rotated directly, or the baffle 131 may be driven to rotate by a motor or other means.

[0058] The protrusion 1323 has a limiting part 1325 that protrudes outward in a circumferential direction at one end facing the ejector tube 110, and the baffle 131 is limited between the end face (first end face 1322a) of the kit 1322 facing the ejector tube 110 and the limiting part 1325.

[0059] The baffle 131 is confined between the end face of the ejector tube 110 and the limiting part 1325, so that the baffle 131 will not detach from the connecting tube 1321 when it is rotated.

[0060] One ejector tube 110 corresponds to multiple gas nozzles 120.

[0061] The ejector tube 110, equipped with multiple gas nozzles 120, has a stronger ejection capability and a greater velocity momentum of the entrained primary air. The fine-tuning of the opening of the air inlet 1312, achieved through rotation, further enhances the improvement of this ejector system 100.

[0062] In this embodiment, the ejector system 100 has two ejector tubes 110, namely an outer ring ejector tube 110 and an inner ring ejector tube 110. The inner ring ejector tube 110 is provided with one gas nozzle 120, while the outer ring ejector tube 110 is provided with two gas nozzles 120. The outer ring ejector tube 110 requires more primary air; therefore, multiple gas nozzles 120 are provided to improve the ejection capacity of the outer ring ejector tube 110.

[0063] like Figure 7 As shown, the ejector tube 110 is divided into an absorption section 112 and a straight tube section 111. The funnel-shaped part of the inlet of the ejector tube 110 is the absorption section 112 of the ejector tube 110, and the straight tube section 111 is connected to the constriction port (outlet end) of the absorption section 112.

[0064] The inner surface 112a of the absorption section 112 of the ejector tube 110 is a continuous arc-shaped surface that protrudes inward.

[0065] The inner surface of the absorption section 112 of the ejector tube 110 of the ejector system 100 is an inwardly protruding curved surface. Compared with the straight plate structure of the absorption section 112 of the existing ejector tube 110, it reduces the flow separation and backflow of the absorption section 112, improves the ejection performance of the ejector tube 110, provides more oxygen for combustion, achieves more complete combustion, and reduces the emission of toxic and harmful gases such as CO and NO.

[0066] The inlet end 1121 of the absorption section 112 of the ejector tube 110 is rounded.

[0067] By setting the inlet end 1121 to a rounded corner, the primary air intake is guided in more smoothly.

[0068] The inner surface of the outlet end of the absorber section 112 of the ejector tube 110 is tangent to the inner surface of the throat of the straight section 111 of the ejector tube 110.

[0069] The inner surface of the outlet end of the absorber section 112 of the ejector tube 110 is tangent to the inner surface of the throat of the straight section 111 of the ejector tube 110, allowing the mixture of primary air and fuel gas to pass smoothly through the ejector tube 110.

[0070] The absorption section 112 is the air intake part of the ejector tube 110, and the diameter of the absorption section 112 gradually decreases from the air intake port of the ejector tube 110 toward the direction away from the air intake port. The end of the absorption section 112 away from the air intake port is connected to the throat of the straight pipe section 111.

[0071] In this embodiment, the damper structure 130 is configured such that primary air enters the ejector tube 110 in the radial direction.

[0072] In other embodiments, the damper structure 130 may also be configured such that primary air enters the ejector tube 110 from the axial direction, in which case the air inlet 1312 of the damper structure 130 is oriented axially.

[0073] The design of the inner surface of the absorption section 112 of the ejector tube 110 as a continuous arc-shaped surface protruding inward is also applicable to the ejector system 100 that absorbs primary air from the axis.

[0074] The following is based on Figures 8-10 This describes the effect of the arc-shaped curved surface of the absorption section in this invention.

[0075] Figure 8 The left figure is a simulation diagram of the fluid flow state inside the ejector tube of this invention, using simulation software. Figure 8The right figure shows the fluid flow state within an ejector tube in the prior art, simulated using simulation software. Each ejector tube in the figure is equipped with a corresponding gas nozzle, and the air intake is radial, with the intake configuration consistently set. The only difference between the ejector tube of this invention in the left figure and the prior art ejector tube in the right figure is that the inner surface of the absorption section of the former is a continuous, inwardly protruding arc-shaped surface, while the inner surface of the absorption section of the latter is a straight plate.

[0076] Figure 8 The fluid velocity is higher in the part of the color that is closer to red, and lower in the part of the color that is closer to blue. See the velocity-color scale above.

[0077] like Figure 8 As shown in the left and right figures, the gas nozzle ejects a high-speed gas flow into the ejector tube (corresponding to the red area in the figure). The high-speed gas flow drives the primary air flow entering from the periphery of the ejector tube to accelerate into the ejector tube (corresponding to the dark blue to blue area in the figure).

[0078] Comparing the left and right images, we can see that in the left image, a light blue accelerated flow region V1 is formed near the inner surface of the ejector tube at the inlet, while in the right image, a blue accelerated flow region V2 is formed near the inner surface of the ejector tube at the inlet. The light blue accelerated flow region V1 is only formed near the gas injection position close to the center of the ejector tube. The gas velocity in accelerated flow region V1 is greater than that in accelerated flow region V2. Therefore, the velocity of the primary air entering through the curved inner surface of the ejector tube in the left image is higher than that of the primary air entering through the non-curved inner surface of the ejector tube in the right image. This can be seen from the displayed flow velocity of the airflow entering the straight section of the ejector tube; the dark red region entering the straight section in the left image is larger than that in the right image. Under the same damper opening, according to the flow formula Q=V*A (V is velocity, A is area), the greater the velocity, the more air is mixed per unit time. The ejector tube shown in the left figure has stronger ejection performance, which is improved by about 10%, providing more oxygen for combustion, achieving more complete combustion, and reducing the emission of toxic and harmful gases such as CO and NO.

[0079] Referring to the arrows indicating the direction of fluid flow in the left figure, the primary airflow in the left figure always flows close to the inner surface of the ejector tube without forming a split, thus being smoothly carried into the ejector tube by the high-speed gas flow. However, referring to the arrows indicating the direction of fluid flow in the right figure, the accelerated flow region V2 formed after the primary airflow is accelerated by the high-speed gas flow does not flow close to the inner surface of the ejector tube, but rather separates from it (region V3), resulting in flow separation. Flow separation introduces uncertainty into the flow, such as generating eddies, resulting in high flow resistance and ultimately reducing the ejection volume.

[0080] Figure 9 The left figure is a simulation diagram of the fluid flow state inside the ejector tube of this invention, using simulation software. Figure 9 The right figure in the diagram shows the fluid flow state within an ejector tube in the prior art, simulated using simulation software. Both the left and right figures show two ejector tubes: an outer ring ejector tube and an inner ring ejector tube. The outer ring ejector tube has two corresponding gas nozzles, and the inner ring ejector tube has one corresponding gas nozzle. Both ejector tubes in the left and right figures draw air radially, and the air intake state is set identically in both figures. The only difference between the ejector tube of this invention in the left figure and the prior art ejector tube in the right figure is that the inner surface of the absorption section of the former ejector tube is a continuous, inwardly protruding arc-shaped surface, while the inner surface of the absorption section of the latter ejector tube is a straight plate.

[0081] Figure 9 The fluid velocity is higher in the part of the color that is closer to red, and lower in the part of the color that is closer to blue. See the velocity-color scale above.

[0082] like Figure 9 As shown in the left and right figures, the gas nozzle ejects a high-speed gas flow into the ejector tube (corresponding to the red area in the figure). The high-speed gas flow drives the primary air flow entering from the periphery of the ejector tube to accelerate into the ejector tube (corresponding to the dark blue to blue area in the figure).

[0083] Comparing the left and right images, we can see that in the left image, a light blue accelerated flow region V1 is formed near the inner surface of the ejector tube at the inlet, while in the right image, a blue accelerated flow region V2 is formed near the inner surface of the ejector tube at the inlet. The light blue accelerated flow region V1 is only formed near the gas injection position close to the center of the ejector tube. The gas velocity in accelerated flow region V1 is greater than that in accelerated flow region V2. Therefore, the velocity of the primary air entering through the curved inner surface of the ejector tube in the left image is higher than that of the primary air entering through the non-curved inner surface of the ejector tube in the right image. This can be seen from the displayed flow velocity of the airflow entering the straight section of the ejector tube; the dark red region entering the straight section in the left image is larger than that in the right image. Under the same damper opening, according to the flow formula Q=V*A (V is velocity, A is area), the greater the velocity, the more air is mixed per unit time. The ejector tube shown in the left figure has stronger ejection performance, which is improved by about 10%, providing more oxygen for combustion, achieving more complete combustion, and reducing the emission of toxic and harmful gases such as CO and NO.

[0084] Referring to the arrows indicating the direction of fluid flow in the left figure, the primary airflow in the left figure always flows close to the inner surface of the ejector tube without forming a split, thus being smoothly carried into the ejector tube by the high-speed gas flow. However, referring to the arrows indicating the direction of fluid flow in the right figure, the accelerated flow region V2 formed after the primary airflow is accelerated by the high-speed gas flow does not flow close to the inner surface of the ejector tube, but rather separates from it (region V3), resulting in flow separation. Flow separation introduces uncertainty into the flow, such as generating eddies, resulting in high flow resistance and ultimately reducing the ejection volume.

[0085] Furthermore, comparing the left and right figures, the surface design of the ejector tube of this invention significantly improves the ejection effect of the outer ring ejector tube. The flow rate of the outer ring ejector tube is significantly greater than that of the inner ring ejector tube. In other words, the surface design of the ejector tube of this invention significantly improves the ejection effect of the ejection system with a larger flow rate.

[0086] Figure 10 The image above is a simulation of the fluid flow state inside an ejector tube in existing technology, using simulation software. Figure 10 The lower figure below is a simulation of the fluid flow state within the ejector tube of this invention, generated using simulation software. Each ejector tube is equipped with a corresponding gas nozzle, and air enters from the axial direction, with the air intake configuration consistently set. The only difference between the ejector tube of this invention in the lower figure and the prior art ejector tube in the upper figure is that the inner surface of the absorption section of the former is a continuous, inwardly protruding arc-shaped surface, while the inner surface of the absorption section of the latter is a straight plate.

[0087] Figure 10 The fluid velocity is higher in the part of the color that is closer to red, and lower in the part of the color that is closer to blue. See the velocity-color scale in the lower left corner.

[0088] like Figure 10 As shown in the upper and lower figures, the gas nozzle ejects a high-speed gas flow into the ejector tube (corresponding to the red area in the figure). The high-speed gas flow drives the primary air flow entering from the periphery of the ejector tube to accelerate into the ejector tube (corresponding to the dark blue to blue area in the figure).

[0089] Comparing the top and bottom images, we can see that in the bottom image, a light blue accelerated flow region V1 forms near the inner surface of the ejector tube inlet, while in the top image, a blue accelerated flow region V2 forms near the inner surface of the ejector tube inlet. The light blue accelerated flow region V1 only forms near the gas injection point close to the center of the ejector tube. The gas velocity in accelerated flow region V1 is greater than that in accelerated flow region V2. Therefore, the primary air entering through the curved inner surface of the ejector tube in the bottom image has a higher velocity than the primary air entering through the non-curved inner surface of the ejector tube in the top image. Under the same damper opening, according to the flow formula Q=V*A (V is velocity, A is area), the higher the velocity, the more air is mixed per unit time. The ejector tube shown in the left image has stronger ejection performance, improving it by about 10%, providing more oxygen for combustion, achieving more complete combustion, and reducing the emission of toxic and harmful gases such as CO and NO.

[0090] Referring to the arrows indicating the direction of fluid flow in the diagram below, the primary airflow in the diagram consistently flows along the inner surface of the ejector tube without forming a split, thus being smoothly carried into the ejector tube by the high-speed gas flow. However, referring to the arrows indicating the direction of fluid flow in the diagram above, the accelerated flow region V2 formed after the primary airflow is accelerated by the high-speed gas flow does not adhere to the inner surface of the ejector tube, but rather separates from it (region V3). This flow separation introduces uncertainty into the flow, such as the generation of eddies, resulting in high flow resistance and ultimately reducing the ejection volume. Furthermore, in the diagram above, the primary air also forms a backflow (region V4) after entering the ejector tube, further reducing the ejection volume.

[0091] According to the simulation results above, the surface design of the absorption section of the ejector tube of this invention has a good effect on the ejection effect of the ejector system, and this improvement is not affected by the damper structure. Moreover, the improvement is more significant for ejector systems with larger flow rates.

[0092] It should be understood in the art that the surface design does not affect the improvement of the ejection effect due to the damper structure, and those skilled in the art can choose existing axial or radial damper structures as needed.

[0093] This embodiment also provides a burner that includes the ejector system described above.

[0094] The burner's ejector system has a baffle around the gas nozzle. By adjusting the opening of the baffle's air inlet, the amount of primary air entering radially from the nozzle can be adjusted. Furthermore, the adjustment range is easier to control by rotating the baffle, thus enabling fine-tuning of the damper opening.

[0095] In the description of this utility model, "radial", "circumferential" and "axial" are all based on the central axis of the ejector tube.

[0096] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0097] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. An ejector system comprising an ejector, a gas nozzle and a damper structure, characterized in that, the gas nozzle is arranged towards an air inlet of the ejector; the damper structure comprises a baffle plate arranged around the gas nozzle, the baffle plate is provided with air inlets, and the baffle plate can be rotated to adjust the opening degree of the air inlets.

2. The ejector system of claim 1, wherein An end surface of the baffle plate close to the ejector is separated from an inlet end of an absorption section of the ejector by a predetermined distance.

3. The ejector system of claim 1, wherein, The damper structure further comprises a support member, the support member is connected to the nozzle, an end of the support member towards the ejector is provided with a plurality of protrusions spaced circumferentially, the baffle plate is arranged around the protrusions, the air inlets are arranged corresponding to the protrusions, and the baffle plate can be rotated to adjust the coincidence degree of the air inlets and the protrusions.

4. The ejector system of claim 3, wherein, The damper structure further comprises a bracket, the bracket connects the support member and the ejector respectively.

5. The ejector system of claim 3, wherein, The support member comprises a connecting pipe and a sleeve, the sleeve is sleeved on an end of the connecting pipe close to the ejector, the protrusions are arranged on an end surface of the sleeve facing the ejector, and the nozzle is connected to an end of the connecting pipe close to the ejector.

6. The ejector system of claim 5, wherein, The support member further comprises an elastic member, the elastic member presses the sleeve in a direction towards the ejector, and the sleeve is threadedly connected to the connecting pipe.

7. The ejector system of claim 3, wherein The baffle plate is annular structure, and is provided with a plurality of air inlets spaced circumferentially, and an operating handle is further arranged on an outer circumferential surface of the baffle plate.

8. The ejector system of claim 5, wherein, An end of the protrusion towards the ejector is provided with a limiting portion protruding outward circumferentially, and the baffle plate is limited between the end surface of the sleeve facing the ejector and the limiting portion.

9. The ejector system of claim 1, wherein, One ejector corresponds to a plurality of gas nozzles.

10. A burner characterized by, The ejector system comprises the ejector system according to any one of claims 1-9.

Images