Multi-channel air knife

Abstract

A multi-channel air knife comprises a shell, a ventilation cavity is formed in the shell, a main ventilation cavity and an auxiliary ventilation cavity which are not communicated with each other are formed in the ventilation cavity, the main ventilation cavity is a high-speed airflow channel, and the auxiliary ventilation cavity is a low-speed airflow channel; the main ventilation cavity is provided with a main ventilation opening formed in the length direction of the ventilation cavity, and the auxiliary ventilation cavity is provided with a plurality of air uniformizing holes used for air outlet. An air nozzle communicated with the ventilation cavity is arranged at the bottom of the shell; compared with the prior art, through the physical isolation design of the main ventilation cavity and the auxiliary ventilation cavity, independent control over auxiliary uniform flow of high-speed airflow and low-speed airflow is achieved, the airflow speeds of different areas are accurately adjusted, and more flexible wind power distribution is achieved; and the start-stop or the air volume of the two channels of the main ventilation cavity and the auxiliary ventilation cavity is independently controlled according to actual requirements.

Description

Technical Field

[0001] The invention relates to the technical field of air knives, and in particular to a multi-channel air knife. Background Art

[0002] Wind knife, also known as air knife, is a device specially used to blow out strong and high-speed airflow. It is mainly used for applications such as air blowing to remove water, air blowing to remove dust, and cooling. The wind knife is driven by a motor to suck air and pass it through specially designed blades or nozzles to produce a high-speed rotating airflow. The high-speed rotating airflow forms a strong airflow beam due to the centrifugal force. The airflow beam passes through a special flow channel or nozzle outlet, forming a high-speed airflow shear boundary at the outlet. When this boundary contacts the object to be processed, it generates a strong shear force, thereby achieving the effect of cutting, clearing or separation.

[0003] As modern industry's demand for precision machining, efficient cleaning and surface treatment continues to increase, air knife technology, as a core process based on high-speed airflow control, has been widely used in the fields of automobile manufacturing, electronic assembly, semiconductor packaging, metal processing, etc. Traditional air knife equipment usually adopts a single-channel airflow design. In order to ensure a wide range of coverage requirements, the air knife needs to maintain high-speed airflow continuously, which consumes a lot of energy; it also cannot flexibly respond to complex surfaces or diversified process requirements.

[0004] A Chinese patent with application number 202321684578.4 discloses a wind knife and a corona machine. The wind knife disclosed above includes: a wind knife body and a flow duct adjustment plate; the wind knife body is provided with an air inlet on one side along its length direction, and an air outlet on the upper side; the flow duct adjustment plate is arranged in the wind knife body, and is located between the air outlet and the air inlet, dividing the interior of the wind knife body into two upper and lower areas; the flow duct adjustment plate is provided with a plurality of ventilation holes along its length direction, and the aperture of the ventilation holes gradually increases along the air inlet in a direction away from the air inlet and / or the distribution density of the ventilation holes gradually increases along the air inlet in a direction away from the air inlet. A Chinese patent with application number 202022173121.X discloses a wind knife, and the above-disclosed wind knife includes: a wind knife body; two air inlet holes, respectively arranged at the left and right ends of the wind knife body; an air collecting chamber, arranged in the wind knife body and extending in the left and right directions, and both ends of the air collecting chamber are connected with the air inlet holes; a flow guide chamber, arranged in the wind knife body and extending in the left and right directions; a flow passage, arranged in the wind knife body and arranged in plurality in the left and right directions, one end of the flow passage is connected with the air collecting chamber, and the other end is connected with the flow guide chamber; a jet hole, arranged on the wind knife body and arranged in plurality in the left and right directions, and each jet hole is connected with the flow guide chamber.

[0005] In the above-mentioned prior art disclosed, the wind knife adopts a single-channel setting, and the ventilation holes are gradually set along the air inlet direction. However, the traditional single-channel wind knife is limited by the single flow channel structure, and there is an airflow attenuation phenomenon in the length direction, which leads to a significant reduction in the wind speed at the end. The gradual design of the ventilation holes still cannot completely compensate for the pressure drop, and it is difficult to ensure the uniformity during large-area processing. In particular, when processing special-shaped surfaces, the traditional structure cannot flexibly adjust the airflow distribution according to regional requirements; at the same time, the single-channel system needs to continuously maintain high-pressure airflow to ensure the terminal wind speed, resulting in energy waste. Although multiple flow channels are used in the above-mentioned scheme, the separation control of the main and auxiliary airflows is not realized, and the output power cannot be dynamically adjusted according to the working conditions. Summary of the invention

[0006] The present invention aims to overcome the defects in the above-mentioned prior art and provide a multi-channel wind knife capable of realizing a multi-channel structure to achieve independent control of airflows with different flow rates and flexible distribution of wind force.

[0007] In order to achieve the above-mentioned invention objectives, the present invention adopts the following technical scheme: a multi-channel wind knife, comprising a shell, a ventilation cavity is arranged in the shell, the ventilation cavity is provided with a main ventilation cavity and an auxiliary ventilation cavity which are not connected to each other, the main ventilation cavity is a high-speed airflow channel, and the auxiliary ventilation cavity is a low-speed airflow channel; the main ventilation cavity is provided with a main ventilation port arranged along the length direction of the ventilation cavity, and the auxiliary ventilation cavity is provided with a plurality of uniform air holes for air outlet; the bottom of the shell is provided with a wind nozzle connected to the ventilation cavity.

[0008] As a preferred solution of the present invention, the main ventilation cavity is located in the middle of the ventilation cavity, the main ventilation cavity is arranged along the length direction of the ventilation cavity, and the volume of the main ventilation cavity is greater than the volume of the auxiliary ventilation cavity.

[0009] As a preferred solution of the present invention, the main vent is a through groove arranged on the ventilation cavity, and the main vent is located at the top of the ventilation cavity.

[0010] As a preferred solution of the present invention, the auxiliary ventilation cavity is arranged along the length direction of the ventilation cavity, and the auxiliary ventilation cavity is a circular ring structure arranged around the main ventilation cavity.

[0011] As a preferred solution of the present invention, a plurality of the uniform air holes are distributed in an array on the outer wall of the auxiliary ventilation cavity.

[0012] As a preferred solution of the present invention, a connecting hole is provided on the shell, and an auxiliary air inlet is provided on the auxiliary ventilation cavity, which passes through the connecting hole and extends to the outside of the shell.

[0013] As a preferred solution of the present invention, sealing plates for sealing the auxiliary ventilation cavity are provided at both ends of the shell, and a through hole communicating with the main ventilation cavity is formed on the sealing plate.

[0014] As a preferred solution of the present invention, a main air inlet communicating with the main ventilation cavity is provided at the end of the shell.

[0015] As a preferred solution of the present invention, the air nozzle includes two air nozzle plates symmetrically arranged along the length direction of the shell, the top of the air nozzle plate is provided with a connecting portion extending outward, and the bottom of the shell is provided with a lap portion matching the connecting portion.

[0016] As a preferred solution of the present invention, an air outlet channel connected to the main air vent and the air uniforming hole is formed between the two air nozzle plates.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the physical isolation design of the main ventilation cavity and the auxiliary ventilation cavity, the independent control of high-speed airflow and low-speed airflow auxiliary uniform flow is realized, the airflow speed in different areas is accurately adjusted, and a more flexible wind force distribution is achieved. The start and stop or air volume of the two channels of the main ventilation cavity and the auxiliary ventilation cavity are controlled separately according to actual needs; at the same time, the main ventilation port on the main ventilation cavity is arranged along the length direction of the ventilation cavity, which increases the length of the main ventilation cavity outlet, thereby facilitating the rapid outflow of high-speed airflow, and then providing high-impact airflow to remove impurities; a number of uniform air holes are arranged on the auxiliary ventilation cavity, and the low-speed airflow flows out through the uniform air holes, which improves the uniformity of the airflow; 2. Furthermore, the main ventilation cavity is arranged in the middle of the ventilation cavity and the volume of the main ventilation cavity is larger than that of the auxiliary ventilation cavity. The main ventilation cavity is larger in volume and arranged in the middle along the length direction of the ventilation cavity, which can store more high-pressure gas and effectively reduce the pressure attenuation of the airflow during long-distance transportation. By increasing the volume buffering capacity of the main airflow, the pressure drop along the way can be balanced to ensure the consistency of the wind speed at the end and the starting end, thereby solving the problem of significant drop in wind speed at the end of the traditional single-channel wind knife; 3. Furthermore, a plurality of uniform air holes are arranged in an array on the outer wall of the auxiliary ventilation cavity, so as to discretize the auxiliary airflow into multiple micro-jets, reduce the impact of local airflow, reduce energy consumption and realize uniform heat dissipation or dust removal over a large area; 4. Furthermore, the main air vent adopts a top slot design, which uses gravity and flow channel structure to optimize airflow guidance, so that the main airflow forms a concentrated, stable high-speed airflow layer, reduces turbulent interference, and improves cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural exploded diagram of the present invention; Figure 3 It is a structural schematic diagram of the air nozzle of the present invention; Figure 4 This is a schematic diagram of the ventilation cavity structure. Figure markings: shell 1, connecting hole 101, sealing plate 102, through hole 1021, main air inlet 103, overlapping part 104, air nozzle 2, air nozzle plate 201, connecting part 2011, air outlet channel 202, ventilation cavity 3, main ventilation cavity 301, main ventilation port 3011, auxiliary ventilation cavity 302, uniform air hole 3021, auxiliary air inlet 3022. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-Figure 4 As shown, a multi-channel wind knife includes a shell 1, a ventilation cavity 3 is arranged in the shell 1, a main ventilation cavity 301 and an auxiliary ventilation cavity 302 which are not connected to each other are arranged on the ventilation cavity 3, the main ventilation cavity 301 is a high-speed airflow channel, and the auxiliary ventilation cavity 302 is a low-speed airflow channel; the main ventilation cavity 301 is provided with a main ventilation port 3011 arranged along the length direction of the ventilation cavity 3, and the auxiliary ventilation cavity 302 is provided with a plurality of uniform air holes 3021 for air outlet; a wind nozzle 2 which is connected to the ventilation cavity 3 is arranged at the bottom of the shell 1.

[0021] Furthermore, the ventilation cavity 3 is arranged along the length direction of the shell 1, and the main ventilation cavity 301 and the auxiliary ventilation cavity 302 are physically isolated, that is, the main ventilation cavity 301 and the auxiliary ventilation cavity 302 are not connected to each other, and at the same time, the main ventilation cavity 301 is a high-speed airflow channel, and the auxiliary ventilation cavity 302 is a low-speed airflow channel, thereby realizing independent control of high-speed airflow and low-speed airflow auxiliary uniform flow, accurately adjusting the airflow speed in different areas, realizing more flexible wind force distribution, and separately controlling the start and stop or air volume of the two channels of the main ventilation cavity 301 and the auxiliary ventilation cavity 302 according to actual needs.

[0022] In addition, the main vent 3011 is connected to the main ventilation cavity 301 for blowing out the high-speed airflow in the main ventilation cavity 301. The main vent 3011 on the main ventilation cavity 301 is arranged along the length direction of the ventilation cavity 3, which increases the length of the air outlet of the main ventilation cavity 301, thereby facilitating the rapid outflow of the high-speed airflow, thereby providing a high-impact airflow to remove impurities, and improving the continuity of the airflow blowing; a plurality of uniform air holes 3021 are arranged on the auxiliary ventilation cavity 302, and the low-speed auxiliary airflow in the auxiliary ventilation cavity 302 is blown out from the plurality of uniform air holes 3021, thereby ensuring the uniformity of the airflow blowing. By setting the main ventilation cavity 301 and the auxiliary ventilation cavity 302 that are not connected to each other, the independent control of the main airflow and the auxiliary airflow is realized, and the ratio and output intensity of the two airflows can be dynamically adjusted according to different process requirements, which significantly improves the uniformity and adaptability of the airflow distribution, and is particularly suitable for the treatment of special-shaped surfaces.

[0023] The main ventilation cavity 301 is located in the middle of the ventilation cavity 3. The main ventilation cavity 301 is arranged along the length direction of the ventilation cavity 3, and the volume of the main ventilation cavity 301 is greater than the volume of the auxiliary ventilation cavity 302. Furthermore, the ventilation cavity 3 is a cylindrical structure, and the main ventilation cavity 301 is arranged on the axis of the cylindrical structure. The main ventilation cavity 301 is relatively large and is arranged in the middle along the length direction of the ventilation cavity 3, which can store more high-pressure gas and effectively reduce the pressure attenuation of the airflow during long-distance transportation. By increasing the volume buffering capacity of the main airflow, the pressure drop along the way can be balanced to ensure the consistency of the wind speed at the end and the starting end, thereby solving the problem of a significant decrease in the wind speed at the end of the traditional single-channel wind knife; the central layout of the main ventilation cavity 301 enhances the internal mechanical symmetry of the shell 1, reduces the vibration caused by the impact of the airflow, and at the same time, the large-volume main cavity is deformed less under high pressure, ensuring the geometric accuracy of the air outlet, avoiding shear force fluctuations caused by structural deformation, thereby improving the reliability of equipment operation.

[0024] The main vent 3011 is a through slot arranged on the ventilation cavity 3, and the main vent 3011 is located at the top of the ventilation cavity 3. Furthermore, the length of the main vent 3011 is the same as the length of the main ventilation cavity 301, and the main vent 3011 is arranged at the top of the ventilation cavity 3, and the main vent 3011 adopts a top through slot design. When the airflow in the main ventilation cavity 301 is blown out from the main vent 3011, the airflow fills the entire shell 1 from top to bottom, and the airflow flows into the wind nozzle 2 at the lower end of the shell 1, and then is blown out from the wind nozzle 2. The gravity and flow channel structure are used to optimize the airflow guidance, so that the main airflow forms a concentrated and stable high-speed airflow layer, reduces turbulent interference, and improves the airflow cleaning efficiency.

[0025] The auxiliary ventilation chamber 302 is arranged along the length direction of the ventilation chamber 3, and the auxiliary ventilation chamber 302 is a circular ring structure arranged around the main ventilation chamber 301. Furthermore, the auxiliary ventilation chamber 302 is arranged on the circumference of the ventilation chamber 3 close to the outer wall, that is, the auxiliary ventilation chamber 302 is arranged around the main ventilation chamber 301, and the auxiliary ventilation chamber 302 is a circular ring structure. The auxiliary ventilation chamber 302 and the main ventilation chamber 301 are coaxially arranged. Through the above arrangement, the space occupancy is reduced, and at the same time, it is ensured that the airflow in the auxiliary ventilation chamber 302 can quickly fill the entire shell 1 and be blown out from the air nozzle 2.

[0026] A plurality of uniform wind holes 3021 are distributed in an array on the outer wall of the auxiliary ventilation cavity 302. Furthermore, a plurality of uniform wind holes 3021 are evenly arranged along the circumferential direction of the ventilation cavity 3, and a plurality of uniform wind holes 3021 are distributed in an array along the length direction of the ventilation cavity 3. The airflow in the auxiliary ventilation cavity 302 is blown out from the uniform wind holes 3021 evenly distributed in an array. The array distribution of the uniform wind holes 3021 is optimized by fluid mechanics to discretize the auxiliary airflow into multiple micro-jets, thereby reducing the impact of local airflow, reducing energy consumption, and realizing large-area uniform heat dissipation or dust removal. It should be noted that the outer wall of the auxiliary ventilation cavity 302 is the outer wall of the ventilation cavity 3.

[0027] A connecting hole 101 is provided on the shell 1, and an auxiliary air inlet 3022 is provided on the auxiliary ventilation cavity 302, which passes through the connecting hole 101 and extends to the outside of the shell 1. Furthermore, the connecting hole 101 is arranged on the side wall of the shell 1, and the auxiliary air inlet 3022 is arranged in the middle of the auxiliary ventilation cavity 302. The auxiliary air inlet 3022 is a tubular structure, which passes through the connecting hole 101 and extends to the outside of the shell 1, and the airflow enters the auxiliary ventilation cavity 302 through the auxiliary air inlet 3022.

[0028] Both ends of the shell 1 are provided with sealing plates 102 for sealing the auxiliary ventilation cavity 302, and the sealing plate 102 is provided with a through hole 1021 connected with the main ventilation cavity 301. Furthermore, the sealing plates 102 are arranged at the opposite ends of the shell 1 to seal the auxiliary ventilation cavity 302, thereby avoiding the auxiliary ventilation cavity 302 from being connected with the main ventilation cavity 301, and at the same time, a through hole 1021 is opened on the sealing plate 102 to achieve connection with the main ventilation cavity 301. The sealing plate 102 is designed to ensure the airtightness of the auxiliary ventilation cavity 302 and avoid the auxiliary airflow interfering with the main airflow path. At the same time, the fluidity of the main ventilation cavity 301 is ensured by the through hole 1021.

[0029] A main air inlet 103 connected to the main ventilation chamber 301 is provided at the end of the shell 1. Furthermore, the main air inlet 103 is arranged at one end of the shell 1. The main air inlet 103 is a tubular structure. High-speed airflow enters the main ventilation chamber 301 from the main air inlet 103. At the same time, the main air inlet 103 is arranged at one end of the shell 1, rather than at both ends of the shell 1. This is to avoid collision between the two air flows when the air flows through the main air inlet 103 into the main ventilation chamber 301, thereby disturbing the air flow path and reducing the flow rate of the air flow.

[0030] The air nozzle 2 includes two air nozzle plates 201 symmetrically arranged along the length direction of the shell 1, the top of the air nozzle plate 201 is provided with a connecting portion 2011 extending outward, and the bottom of the shell 1 is provided with a lap portion 104 matching the connecting portion 2011. Furthermore, the cross-sectional width of the two air nozzle plates 201 gradually decreases from top to bottom, the connecting portion 2011 is arranged along the length direction of the air nozzle plate 201, and the connecting portion 2011 is horizontally extended to the outside of the air nozzle plate 201, and the lap portion 104 at the bottom of the shell 1 extends into the shell 1, the lap portion 104 is located on opposite sides of the bottom of the shell 1, and a certain distance is formed between the two lap portions 104 for connecting the air nozzle 2, the lap portion 104 is overlapped on the corresponding connecting portion 2011, and the airflow in the ventilation cavity 3 is blown out through the air nozzle 2.

[0031] An air outlet channel 202 connected to the main vent 3011 and the uniform air hole 3021 is formed between the two air nozzle plates 201 . Furthermore, the air outlet channel 202 is arranged along the length direction of the air nozzle 2 , and the air outlet channel 202 is a ventilation gap between the two air nozzle plates 201 .

[0032] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0033] Although this article uses more of the following terms: housing 1, connecting hole 101, sealing plate 102, through hole 1021, main air inlet 103, overlapping portion 104, air nozzle 2, air nozzle plate 201, connecting portion 2011, air outlet channel 202, ventilation cavity 3, main ventilation cavity 301, main air outlet 3011, auxiliary ventilation cavity 302, uniform air hole 3021, auxiliary air inlet 3022, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A multi-channel air knife, characterized in that: The invention comprises a shell (1), wherein a ventilation cavity (3) is provided in the shell (1), and the ventilation cavity (3) is provided with a main ventilation cavity (301) and an auxiliary ventilation cavity (302) which are not connected to each other, wherein the main ventilation cavity (301) is a high-speed airflow channel, and the auxiliary ventilation cavity (302) is a low-speed airflow channel; the main ventilation cavity (301) is provided with a main ventilation opening (3011) arranged along the length direction of the ventilation cavity (3), and the auxiliary ventilation cavity (302) is provided with a plurality of uniform air holes (3021) for air outlet; and the bottom of the shell (1) is provided with an air nozzle (2) which is connected to the ventilation cavity (3).

2. A multi-channel air knife according to claim 1, characterized in that: The main ventilation cavity (301) is located in the middle of the ventilation cavity (3), the main ventilation cavity (301) is arranged along the length direction of the ventilation cavity (3), and the volume of the main ventilation cavity (301) is greater than the volume of the auxiliary ventilation cavity (302).

3. The multi-channel air knife according to claim 1, characterized in that: The main ventilation opening (3011) is a through groove arranged on the ventilation cavity (3), and the main ventilation opening (3011) is located at the top of the ventilation cavity (3).

4. The multi-channel air knife according to claim 1, characterized in that: The auxiliary ventilation cavity (302) is arranged along the length direction of the ventilation cavity (3), and the auxiliary ventilation cavity (302) is a circular ring structure arranged around the main ventilation cavity (301).

5. The multi-channel air knife according to claim 1, characterized in that: The plurality of uniform air holes (3021) are distributed in an array on the outer wall of the auxiliary ventilation cavity (302).

6. The multi-channel air knife according to claim 1, characterized in that: The shell (1) is provided with a connection hole (101), and the auxiliary ventilation cavity (302) is provided with an auxiliary air inlet (3022) that passes through the connection hole (101) and extends toward the outside of the shell (1).

7. The multi-channel air knife according to claim 1, characterized in that: Both ends of the shell (1) are provided with sealing plates (102) for sealing the auxiliary ventilation cavity (302), and a through hole (1021) communicating with the main ventilation cavity (301) is formed on the sealing plate (102).

8. The multi-channel air knife according to claim 1, characterized in that: The end of the shell (1) is provided with a main air inlet (103) which is in communication with the main ventilation cavity (301).

9. The multi-channel air knife according to claim 1, characterized in that: The air nozzle (2) comprises two air nozzle plates (201) symmetrically arranged along the length direction of the shell (1); a connecting portion (2011) extending outward is provided on the top of the air nozzle plate (201); and a lap joint (104) matching with the connecting portion (2011) is provided on the bottom of the shell (1).

10. The multi-channel air knife according to claim 9, characterized in that: An air outlet channel (202) connected to the main air vent (3011) and the air uniforming hole (3021) is formed between the two air nozzle plates (201).

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