Alternating jet flow generating device and foreign matter removing equipment
Through the innovative design of the jet deflection cavity and resonant cavity, the structure of the alternating jet generator is simplified, solving the problems of high reliability and cost of traditional devices, and achieving efficient foreign matter removal and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INPAI BATTERY TECH CO LTD
- Filing Date
- 2026-02-06
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional alternating jet generators have complex structures and contain easily damaged moving parts, resulting in low reliability and high cost.
By employing a jet deflection cavity and a resonant cavity design, the structure is simplified and the dependence on an external power source is eliminated. The high-speed airflow and the periodic oscillation of ultrasonic waves work together to remove foreign objects.
This improved the reliability of the device and reduced production, maintenance and usage costs, while also enhancing the removal of foreign objects.
Smart Images
Figure CN121993464A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of fluid mechanics, and more specifically, to an alternating jet generating device and a foreign matter removal device. Background Technology
[0002] Alternating jet generators are typically used to apply the energy of fluids such as gases or liquids to a target object in a directional and periodically varying manner to achieve purposes such as efficient cleaning and enhanced mixing.
[0003] Traditional alternating jet generators are mainly mechanically driven, which use external power sources such as motors, solenoid valves or piezoelectric ceramics to periodically switch the flow channel or change the nozzle direction, thereby outputting jets with alternating directions.
[0004] However, traditional alternating jet generators of this type suffer from problems such as low reliability and high cost due to their complex structure and the presence of easily damaged moving parts. Summary of the Invention
[0005] The purpose of this application is to provide an alternating jet generator and a foreign object removal device. By setting up a jet deflection cavity and a resonant cavity, the structure of the alternating jet generator can be simplified and the dependence on an external power source can be eliminated, thereby improving the reliability of the alternating jet generator and reducing the production, maintenance and use costs of the alternating jet generator.
[0006] In a first aspect, this application provides an alternating jet generator, comprising at least M jet deflection cavities and at least two resonant cavities; wherein M > 0; each jet deflection cavity includes a main pipe, two sets of branch pipes located on both sides thereof, and a return pipe; the exit end of the main pipe is connected to the entrance ends of the two branch pipes respectively; the exit end of the return pipe is connected to the middle section of the main pipe, the entrance end of the return pipe is connected to the exit end of the main pipe, and the exit end of the return pipe and the entrance end of the opposite branch pipe face each other; each resonant cavity includes a shell and a resonant pipe; the shell has a top, a bottom, and an internal cavity; the top faces the jet deflection cavity; the resonant pipe penetrates the top and bottom of the shell, and a plurality of through holes are distributed on the pipe wall of the resonant pipe, the through holes connecting the cavity and the interior of the resonant pipe; wherein, among the M jet deflection cavities, X branch pipes of the jet deflection cavities are connected to the incident ends of the main pipes of other jet deflection cavities, and the exit ends of the remaining MX branch pipes of the jet deflection cavities are connected to one end of the resonant pipe of the resonant cavity; X≥0; the other end of the resonant pipe of the resonant cavity connected to the branch pipe is connected to the resonant pipe of other resonant cavities.
[0007] The aforementioned alternating jet generator simplifies its structure by incorporating a jet deflection cavity and a resonant cavity, eliminating reliance on an external power source. This improves the reliability of the alternating jet generator and reduces its production, maintenance, and operating costs. In particular, when the alternating jet generator provided in this embodiment is used to clean foreign objects, the synergistic effect of the high-speed airflow emitted by the alternating jet generator and the periodically oscillating ultrasonic waves overcomes the adhesion between the particles of the foreign object and the target surface, thereby improving the cleaning effect.
[0008] In conjunction with the first aspect, optionally, the two return pipes are symmetrical about the length direction of the main pipe.
[0009] The aforementioned alternating jet generator, through the symmetrical design of two return pipes, further ensures that the frequency of the airflow is equal when it alternately approaches the inner wall of the main pipe, thereby further ensuring the stability of the frequency of the airflow when it comes out of the output end of the alternating jet generator.
[0010] In conjunction with the first aspect, the return pipe may optionally be arc-shaped.
[0011] The aforementioned alternating jet generator, with its arc-shaped return pipe design, is smoother than other curved shapes. This arc shape further suppresses local noise or vortex-induced vibration, resulting in lower flow resistance and energy loss. This also further ensures the stability of the airflow frequency as it exits the alternating jet generator.
[0012] In conjunction with the first aspect, optionally, the walls of the two branch pipes are formed with guide cones at the exit end of the main pipe; the conical portion of the guide cone and the exit end of the main pipe face each other.
[0013] The aforementioned alternating jet generator promotes unilateral airflow by obstructing the airflow with a guide cone, thereby making the alternating switching of airflow between the two branch pipes more obvious and ultimately further improving the quality of the ejected alternating jet.
[0014] In conjunction with the first aspect, optionally, a flow-dividing wedge is formed between the outlet end of the return pipe and the inlet end of the branch pipe; the flow-dividing wedge has a tip that points towards the outlet end of the main pipe.
[0015] The aforementioned alternating jet generator, through its pointed flow-dividing wedge design, enhances the guiding effect during flow division and reduces the kinetic energy loss of the fluid during division. This results in a higher energy output from the alternating jet generator, further improving its effectiveness in tasks such as foreign matter removal or enhanced mixing. Furthermore, the conical flow-dividing wedge reduces stress on the wedge, thereby minimizing damage to the jet deflection cavity.
[0016] In conjunction with the first aspect, optionally, where M=3 and X=2.
[0017] The aforementioned alternating jet generator, by specifying three jet deflection cavities arranged with one primary deflection cavity and two secondary deflection cavities, reduces the probability of oscillation instability or frequency drop caused by oscillation and high flow rate output compared to a smaller number of jet deflection cavities. Compared to a larger number of jet deflection cavities, it reduces the accumulation of response delay in the final jet deflection cavity due to signal attenuation at each stage, thus ensuring synchronization. Therefore, it improves the stability of airflow oscillation within the jet deflection cavities and the power of the final output airflow.
[0018] In conjunction with the first aspect, optionally, the shortest distance from the first end of the through hole to the bottom is greater than the shortest distance from the second end to the bottom; wherein, the first end of the through hole connects to the interior of the resonant pipe, and the second end of the through hole connects to the cavity.
[0019] The aforementioned alternating jet generator, through its inclined through-hole design, allows more detachment vortices to propagate from the bottom to the top of the shell, thereby promoting shell resonance, further increasing acoustic pressure, and ultimately further improving the efficiency of particle stripping by the airflow ejected from the output end of the alternating jet generator.
[0020] In conjunction with the first aspect, optionally, the inner diameter of the end of the resonant conduit near the top is smaller than the inner diameter between the ends of the resonant conduit.
[0021] The aforementioned alternating jet generator, by increasing the inner diameter of the resonant pipe, makes the lateral confinement of the airflow disappear more significantly when it enters the resonant pipe, thereby further promoting the lateral diffusion of the airflow, which is more conducive to the formation of the shear layer and causes the shear layer to become unstable, making it easier to form a shear vortex, and ultimately further increasing the acoustic pressure.
[0022] In conjunction with the first aspect, optionally, the number of resonant cavities is 8; wherein, the number of resonant cavities belonging to the resonant pipes connected to the branch pipes is 4, and the ends of the 4 resonant pipes near the bottom are respectively connected to the resonant pipes of the remaining resonant cavities.
[0023] The aforementioned alternating jet generator, by specifying the number of resonant cavities as eight, improves the continuity and uniformity of the sound field coverage, thereby enhancing the performance of the final ejected alternating airflow.
[0024] Secondly, this application provides a foreign object removal device, including an air extraction device and the alternating jet generator described above; the air extraction device has an air extraction port; wherein, during the process of removing foreign objects from a target surface, the output end of the alternating jet generator is used to output an alternating jet, the alternating jet passes through the target surface and is absorbed by the air extraction port.
[0025] The aforementioned foreign object removal device has the same beneficial effects as the first aspect or any optional embodiment of the first aspect, and will not be described in detail here. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 A schematic diagram of a first structure of the alternating jet generator provided in an embodiment of this application; Figure 2 This is a schematic diagram of the resonant cavity in the alternating jet generator provided in the embodiments of this application; Figure 3 This is a schematic diagram of a second structure of the alternating jet generator provided in the embodiments of this application.
[0028] Icons: 100, Alternating jet generator; 110, Jet deflection cavity; 111, Main pipe; 112, Branch pipe; 113, Return pipe; 114, Guide cone; 115, Flow divider wedge; 120, Resonant cavity; 121, Shell; 122, Resonant pipe; 123, Through hole. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0032] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are used only for the convenience of describing this application 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 application. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0035] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the first structure of the alternating jet generator 100 provided in the embodiments of this application; Figure 2This is a schematic diagram of the resonant cavity 120 in the alternating jet generator 100 provided in this application embodiment. The alternating jet generator 100 provided in this application embodiment includes at least M jet deflection cavities 110 and at least two resonant cavities 120. Where M > 0. When M = 1, the number of resonant cavities 120 can be 2, 4, or 6, etc. When the number of resonant cavities 120 is 2, the resonant cavities 120 can be arranged in one row; when the number of resonant cavities 120 is 4, the resonant cavities 120 can be arranged in two rows; when the number of resonant cavities 120 is 6, the resonant cavities 120 can be arranged in three rows; please refer to... Figure 3 , Figure 3 This is a schematic diagram of a second structure of the alternating jet generator 100 provided in this application embodiment. When M=3, the jet deflection cavities 110 can be arranged in a pyramidal pattern, i.e., one in the first row and two in the second row. The number of resonant cavities 120 can be four, eight, or twelve, etc. When there are four resonant cavities 120, they can be arranged in one row; when there are eight resonant cavities 120, they can be arranged in two rows; and when there are twelve resonant cavities 120, they can be arranged in three columns.
[0036] The jet deflection cavity 110 includes a main pipe 111, two sets of branch pipes 112 located on both sides of it, and a return pipe 113. For example, one branch pipe 112 and one return pipe 113 are located to the left of the main pipe 111, while the other branch pipe 112 and the other return pipe 113 are located to the right of the main pipe 111. The exit end of the main pipe 111 is connected to the entrance ends of the two branch pipes 112. That is, the main pipe 111 and the branch pipes 112 generally form a T-junction or a Y-shaped pipe structure.
[0037] The outlet end of the return pipe 113 is connected to the middle section of the main pipe 111, and the inlet end of the return pipe 113 is connected to the outlet end of the main pipe 111. The outlet end of the return pipe 113 and the inlet end of the branch pipe 112 on the opposite side face each other. For example, the outlet end of the left return pipe 113 and the inlet end of the right branch pipe 112 face each other, and the outlet end of the right return pipe 113 and the inlet end of the left branch pipe 112 face each other. The return pipe 113 can be arc-shaped, elliptical, or other curved. The cross-section and length of the two return pipes 113 can be equal.
[0038] The resonant cavity 120 includes a housing 121 and a resonant conduit 122. The housing 121 has a top, a bottom, and an internal cavity. The top faces the jet deflection cavity 110. The resonant conduit 122 passes through the top and bottom of the housing 121, and a plurality of through holes 123 are distributed on the wall of the resonant conduit 122, which connect the cavity and the interior of the resonant conduit 122.
[0039] In this system, of the M jet deflection cavities 110, the branch pipes 112 of X jet deflection cavities 110 are connected to the injection ends of the main pipes 111 of other jet deflection cavities 110, and the exit ends of the branch pipes 112 of the remaining MX jet deflection cavities 110 are connected to one end of the resonant pipe 122 of the resonant cavity 120. X ≥ 0. The other end of the resonant pipe 122 of the resonant cavity 120 connected to the branch pipe 112 is connected to the resonant pipe 122 of other resonant cavities 120. For example, M=1, X=0, and the number of resonant cavities 120 is 2. The two branch pipes 112 of this jet deflection cavity 110 are connected to the resonant pipe 122 of the resonant cavity 120. The injection end of the main pipe 111 of this jet deflection cavity 110 can be used as the input end of the entire alternating jet generator 100, and can be used to receive high-pressure gas. For yet another example, M=3, X=1, and the number of resonant cavities 120 is 8. The three jet deflection cavities 110 can be arranged in a pyramid shape. The two branch pipes 112 of the first jet deflection cavity 110 are connected to the injection ends of the main pipes 111 of the two jet deflection cavities 110 in the second row. The emission ends of the four branch pipes 112 of the two jet deflection cavities 110 in the second row are connected to one end of the resonant pipe 122 of four of the resonant cavities 120. The other ends of the resonant pipes 122 of these four resonant cavities 120 are connected to the resonant pipes 122 of the other four resonant cavities 120 respectively. The injection end of the main pipe 111 of the first jet deflection cavity 110 can serve as the input end of the entire alternating jet generator 100, and can be used to receive high-pressure gas.
[0040] In the resonant cavity 120 furthest from the input end, the end of the resonant pipe 122 facing away from the input end can serve as the fluid outlet of the alternating jet generator 100 for emitting alternating jets.
[0041] The specific process of the alternating jet generator 100 provided in this application embodiment generating an alternating jet can be as follows: After the airflow passes through the input end of the alternating jet generator 100, it first enters the jet deflection cavity 110. The initially unbalanced airflow is guided by the inner wall of the main pipe 111, and due to the Coanda effect, the airflow will be deflected to one side. At the intersection of the branch pipe 112 and the return pipe 113 on this side, the airflow will split, with one path flowing to the branch pipe 112 and the other path flowing to the return pipe 113. The flow rate and velocity of the airflow in the return pipe 113 will accumulate over time. When the flow rate and velocity accumulate to a certain level, the airflow entering from the input end will be deflected to the other side. After repeated switching, the airflow alternately flows out of the branch pipe 112 of the jet deflection cavity 110 and flows into the next row of jet deflection cavities 110 or resonant cavities 120.
[0042] If there is one jet deflection cavity 110, the airflow alternately flowing out of the branch pipe 112 of the jet deflection cavity 110 flows directly into the resonant pipe 122 in the resonant cavity 120. If there are three jet deflection cavities 110, the airflow alternately flowing out of the branch pipe 112 of the jet deflection cavity 110 flows into the other two jet deflection cavities 110, undergoes the same process, and finally flows into the resonant pipe 122 in the resonant cavity 120.
[0043] After the airflow enters the resonant cavity 120, the binding force on the airflow surface decreases, and it diffuses towards the edge. The airflow near the inner wall of the resonant pipe 122 forms a shear layer with the airflow at the center of the resonant pipe 122 due to air adhesion. The presence of the shear layer causes shear vortices to form on the airflow surface. These shear vortices pass through the through-holes 123 on the resonant pipe 122 and impact the inner wall of the housing 121, generating sound waves. The sound waves generated by the shear vortices impacting the inner wall of the housing 121 are transmitted along the inner wall of the housing 121 to the incident end of the resonant pipe 122, and impact the outer wall of the incident end of the resonant pipe 122. After being impacted by the sound waves, the resonant pipe 122 further stimulates the airflow surface inside the resonant pipe 122, that is, the surface where the airflow contacts the inner wall of the resonant pipe 122. The superimposed high-frequency pulse form of the airflow generates more shear vortices that impact the inner wall of the housing 121. This further amplifies the sound wave amplitude, ultimately forming a superimposed ultrasonic wave pressure at the exit end of the resonant pipe 122 or the fluid outlet of the alternating jet generator 100. The entire alternating jet generator 100 has at least two fluid outlets, and the airflow from the fluid outlets comes from the same air source. Ultimately, the ultrasonic waves generated by the at least two fluid outlets will generate standing waves in the near field of the air knife.
[0044] This standing wave can be used to remove foreign objects from a target surface or to enhance mixing. Taking the removal of foreign objects from a target surface as an example, when the air knife approaches the target surface, the superposition of the antinodes of the standing wave will push the particulate foreign objects to concentrate towards the nodes. Combined with the three-dimensional wind field of the alternating jet, the particles will be suspended in the near-surface layer of the structural component. The particulate foreign objects collide and deposit with each other to form larger particles, which are then carried away by the sound wave pressure and pulse jet, thereby achieving the removal of foreign objects.
[0045] In the above implementation process, by setting the jet deflection cavity 110 and the resonant cavity 120, the structure of the alternating jet generator 100 is simplified, and the dependence on an external power source is eliminated, thereby improving the reliability of the alternating jet generator 100 and reducing the production, maintenance, and usage costs of the alternating jet generator 100. In particular, when the alternating jet generator 100 provided in this application embodiment is used to clean foreign objects, the synergistic effect of the high-speed airflow emitted by the alternating jet generator 100 and the periodically oscillating ultrasonic waves can overcome the adsorption force between the particles of the foreign object and the target surface, thereby improving the cleaning effect of the foreign object.
[0046] Please continue to refer to Figure 1 or Figure 3 In some alternative implementations, the two return pipes 113 are symmetrical about the length of the main pipe 111.
[0047] In the above implementation process, the symmetrical design of the two return pipes 113 further ensures that the frequency of the airflow is equal when it alternately approaches the inner wall of the main pipe 111, thereby further ensuring the stability of the frequency of the airflow when it comes out of the output end of the alternating jet generator 100.
[0048] Please continue to refer to Figure 1 or Figure 3 In some alternative implementations, the return pipe 113 is arc-shaped.
[0049] Optionally, the two return pipes 113, which are symmetrical about the length of the main pipe 111, are both arc-shaped.
[0050] In the above implementation process, the arc-shaped return pipe 113 is smoother than other curved shapes. This arc shape further suppresses the generation of local noise or vortex-induced vibrations, resulting in lower flow resistance and energy loss. This also further ensures the stability of the airflow frequency as it exits the alternating jet generator 100.
[0051] Please continue to refer to Figure 1 or Figure 3In some alternative embodiments, the walls of the two branch pipes 112 are formed with guide cones 114 at the exit end of the main pipe 111. The tapered portion of the guide cone 114 faces each other to the exit end of the main pipe 111.
[0052] In one embodiment, the tapered portion may be V-shaped.
[0053] In the above process, the obstruction of the airflow by the guide cone 114 promotes the unilateral conduction of the airflow, thereby making the alternation of the airflow between the two branch pipes 112 more obvious, and ultimately further improving the quality of the ejected alternating jet.
[0054] Please continue to refer to Figure 1 or Figure 3 In some alternative embodiments, a diversion wedge 115 is formed between the exit end of the return pipe 113 and the entrance end of the branch pipe 112. The diversion wedge 115 has a tip that points towards the exit end of the main pipe 111.
[0055] In the above-described process, the pointed flow-dividing wedge 115 enhances the guiding effect during flow division and reduces the kinetic energy loss of the fluid during division. This results in a higher energy output from the alternating jet generator 100, further improving the effectiveness of using the alternating jet generator 100 for foreign matter removal or enhanced mixing. Furthermore, the conical flow-dividing wedge 115 reduces the stress on it, thereby minimizing damage to the jet deflection cavity 110.
[0056] Please continue to refer to Figure 3 In some alternative implementations, M=3 and X=2.
[0057] That is, when M=3, the jet deflection cavities 110 can be arranged in a pyramid shape, with one in the first row and two in the second row.
[0058] In the above implementation process, by determining the number of jet deflection cavities 110 to be specifically three, with one primary jet deflection cavity 110 and two secondary deflection cavities 110, the probability of oscillation instability or frequency drop caused by bearing oscillation and large flow output is reduced compared to a smaller number of jet deflection cavities 110. Compared to a larger number of jet deflection cavities 110, the accumulation of response delay in the final jet deflection cavity 110 due to signal attenuation at each stage is reduced, thereby ensuring synchronization. Therefore, the stability of airflow oscillation in the jet deflection cavities 110 and the power of the final output airflow are improved.
[0059] In some alternative embodiments, the shortest distance from the first end of the through-hole 123 to the bottom is greater than the shortest distance from the second end to the bottom. The first end of the through-hole 123 connects to the interior of the resonant pipe 122, and the second end of the through-hole 123 connects to the cavity.
[0060] In other words, the through-hole 123 can be inclined relative to the resonant pipe 122. For example: Figure 2 For example, it tilts downwards.
[0061] In the above implementation process, the inclined through hole 123 design allows more detachment vortices to propagate from the bottom to the top of the housing 121, thereby promoting the resonance of the housing 121, further increasing the acoustic pressure, and ultimately further improving the efficiency of the airflow ejected from the output end of the alternating jet generator 100 in stripping particles.
[0062] In some alternative implementations, the inner diameter of the end of the resonant conduit 122 near the top is smaller than the inner diameter between the ends of the resonant conduit 122.
[0063] That is, the inner diameter of the end of the resonant pipe 122 near the top is smaller than the inner diameter of the rest of the resonant pipe 122.
[0064] In the above implementation process, by increasing the inner diameter of the resonant pipe 122, the lateral confinement of the airflow disappears more significantly when it enters the resonant pipe 122, thereby further promoting the lateral diffusion of the airflow, which is more conducive to the formation of the shear layer and causes the instability of the shear layer, making it easier to form a shear vortex, and ultimately further increasing the acoustic pressure.
[0065] Please continue to refer to Figure 3 In some optional embodiments, the number of resonant cavities 120 is eight. Among them, the number of resonant cavities 120 belonging to the resonant pipe 122 connected to the branch pipe 112 is four, and the bottom end of the four resonant pipes 122 is connected to the resonant pipes 122 of the remaining resonant cavities 120 respectively.
[0066] That is, when M=3, X=2, and the number of resonant cavities 120 is 8, the resonant cavities 120 can be arranged in two rows.
[0067] In the above implementation process, by determining that the number of resonant cavities 120 is specifically 8, the continuity and uniformity of the sound field coverage are improved, thereby improving the performance of the final emitted alternating airflow.
[0068] In the manufacturing process of prismatic lithium batteries, the assembly of structural components is mainly done by laser welding. Since foreign matter contamination on the surface of the welding material can cause defects such as explosions and pits in laser welding, the control of foreign matter on structural components is very strict, and non-contact dust removal is required to clean the welding surface of foreign matter.
[0069] Currently, conventional compressed air air knives combined with negative pressure dust removal methods are not very effective due to the formation of a boundary layer caused by the stickiness of particulate matter and the fixed airflow. While brush dust removal can effectively remove foreign matter, it poses a risk of secondary pollution, and the risk management is difficult.
[0070] In view of this, based on the same concept, this application provides a foreign object removal device, including an air extraction device and the alternating jet generator 100 described above. The air extraction device may specifically be a negative pressure suction hood, a fan, etc. The air extraction device has an air extraction port.
[0071] In the process of removing foreign objects from the target surface, the output end of the alternating jet generator 100 is used to output an alternating jet, which passes through the target surface and is absorbed by the air extraction port.
[0072] For example, the vacuum device and the alternating jet generator 100 can be placed on the surface of the welding material, with the suction port of the vacuum device and the output end of the alternating jet generator 100 being parallel and close to the surface of the welding material. After the alternating jet output from the output end of the alternating jet generator 100 passes over the surface of the welding material, it carries away foreign objects on the surface of the welding material and is then drawn away by the vacuum device with the suction port.
[0073] The above implementation process is the same as that of the alternating jet generator 100 described above, and will not be repeated here.
[0074] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An alternating jet generator, characterized in that, It includes at least M jet deflection cavities and at least two resonant cavities; where M > 0; The jet deflection cavity includes a main pipe, two sets of branch pipes located on both sides of it, and a return pipe; the exit end of the main pipe is connected to the entrance ends of the two branch pipes respectively. The outlet end of the return pipe is connected to the middle section of the main pipe, the inlet end of the return pipe is connected to the outlet end of the main pipe, and the outlet end of the return pipe and the inlet end of the branch pipe on the opposite side face each other. The resonant cavity includes a housing and a resonant conduit; the housing has a top, a bottom, and an internal cavity; the top faces the jet deflection cavity; the resonant conduit passes through the top and bottom of the housing, and a plurality of through holes are distributed on the wall of the resonant conduit, the through holes connecting the cavity and the interior of the resonant conduit; Among the M jet deflection cavities, the branch pipes of X jet deflection cavities are connected to the injection end of the main pipe of other jet deflection cavities, and the exit ends of the branch pipes of the remaining MX jet deflection cavities are connected to one end of the resonant pipe of the resonant cavity; X≥0; the other end of the resonant pipe of the resonant cavity connected to the branch pipe is connected to the resonant pipe of other resonant cavities.
2. The alternating jet generator according to claim 1, characterized in that, The two return pipes are symmetrical about the length of the main pipe.
3. The alternating jet generator according to claim 1, characterized in that, The return pipe is arc-shaped.
4. The alternating jet generator according to claim 1, characterized in that, The walls of the two branch pipes form guide cones at the exit end of the main pipe; The tapered portion of the guide cone and the exit end of the main pipe face each other.
5. The alternating jet generator according to claim 1, characterized in that, The outlet end of the return pipe and the inlet end of the branch pipe form a flow-dividing wedge; The diversion wedge has a pointed portion that points towards the exit end of the main pipe.
6. The alternating jet generator according to claim 1, characterized in that, in, M=3, X=2.
7. The alternating jet generator according to claim 1, characterized in that, The shortest distance from the first end of the through hole to the bottom is greater than the shortest distance from the second end to the bottom; wherein, the first end of the through hole connects to the interior of the resonant pipe, and the second end of the through hole connects to the cavity.
8. The alternating jet generator according to claim 1, characterized in that, The inner diameter of the end of the resonant pipe near the top is smaller than the inner diameter between the ends of the resonant pipe.
9. The alternating jet generator according to claim 1, characterized in that, The number of resonant cavities is 8; The number of resonant cavities belonging to the resonant pipes connected to the branch pipes is 4, and the ends of the 4 resonant pipes near the bottom are respectively connected to the resonant pipes of the other resonant cavities.
10. A foreign object removal device, characterized in that, Includes an air extraction device and an alternating jet generator according to any one of claims 1 to 9; The air extraction device has an air extraction port; In the process of removing foreign objects from the target surface, the output end of the alternating jet generator is used to output an alternating jet, which passes through the target surface and is absorbed by the air extraction port.