CN220771819U

CN220771819U - Hot air knife structure

Info

Publication number: CN220771819U
Application number: CN202322590905.6U
Authority: CN
Inventors: 刘伟
Original assignee: Shanghai Fuchi Information Technology Co ltd
Current assignee: Shanghai Fuchi Information Technology Co ltd
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-04-12
Anticipated expiration: 2033-09-25

Abstract

The utility model discloses a hot air knife structure, which comprises a hollow shell and an air inlet pipe fixed on the shell, wherein a transversely distributed parting bead is arranged in the shell, the space in the shell is divided into an air inlet cavity and an air homogenizing cavity which are distributed up and down, gaps for communicating the air inlet cavity and the air homogenizing cavity are arranged on the parting bead at equal intervals, an air outlet groove communicated with the air homogenizing cavity is arranged at the bottom of the shell, and an inclined included angle of 10-30 degrees is formed between the air outlet groove and a vertical surface; the air knife has the advantages that the dehumidification effect can be improved, and the blowing is more uniform, so that the defects of large pressure fluctuation, incomplete dehumidification and nonuniform blowing of the existing air knife are overcome.

Description

Hot air knife structure

Technical Field

The utility model relates to the technical field of cleaning of photovoltaic equipment, in particular to a hot air knife structure.

Background

The air knife is widely applied to the industrial field and is mainly used for blowing off impurities such as moisture, dust and the like on the surface of a product, such as blowing off surface moisture of a steel plate, an aluminum alloy, a photovoltaic cell and the like, blowing off moisture of beverage bottles, packaging containers and the like, cleaning a conveyor belt and the like.

In the field of photovoltaic panel processing, particularly in the production process of silicon wafers, the silicon wafers need to be subjected to texturing and etching, after the reaction of the silicon wafers is finished, the silicon wafers need to be subjected to washing, the washing is moist, the moist silicon wafers are easy to pollute, and the moist silicon wafers are difficult to separate after being stacked together, so that the silicon wafers after the texturing and etching are washed and then need to be dried before entering the next process. The hot air knife is used for drying the silicon wafer through strong blowing of wind, compared with a traditional oven, the hot air knife is short in drying time, hot air parameters can be accurately controlled, and production efficiency is improved.

The existing hot air knife structure generally adopts the design that compressed air is directly introduced into a nozzle, compressed air generated by a compressor enters an air chamber of a hot air knife through a pipeline and is sprayed out from a plurality of small holes distributed at the lower part of the air chamber so as to purge a silicon wafer to realize the drying purpose, but the structure has the following defects: 1. the pressure instability affects the drying effect, the traditional hot air knife directly uses compressed air, the pressure of the compressed air often fluctuates, the pressure and the speed of the air flow sprayed out from the air knife are unstable, the blowing force of the air flow is strong and weak, when the blowing force of the air flow cannot be maintained in a proper range, the effect of drying the surface of the silicon wafer is incomplete, the silicon wafer still keeps certain humidity, if water molecules remain on the surface of the silicon wafer, the water molecules are extremely easy to chemically react with the silicon wafer to generate silicate compounds, such as silicon dioxide and other impurities pollute the silicon wafer, the quality and the electrical performance parameters of the silicon wafer are directly reduced, and therefore, the dehumidification effect of the hot air knife is directly related to the quality of a finished product of the silicon wafer; 2. the uneven blowing, because of design or manufacturing problems, the airflow velocity distribution of the traditional hot air knife sprayed out from different air outlets is obviously uneven, the airflow sweeping strength is larger near the air outlets, and the edge part is smaller, so that the effect of drying the silicon wafer is greatly different according to different positions, and the uniform drying of the whole wafer range cannot be realized.

Disclosure of Invention

The utility model aims to solve the problems of the traditional hot air knife, and provides a hot air knife structure which can improve the dehumidification effect and make the blowing more uniform, thereby solving the defects of large pressure fluctuation, incomplete dehumidification and nonuniform blowing of the traditional hot air knife.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a hot air knife structure, includes hollow casing and fixes the air-supply line on the casing, be provided with a transversely distributed parting bead in the casing, will the space separation in the casing is upper and lower air inlet chamber and even wind chamber that distributes, the interval equidistance is provided with on the parting bead and is used for the intercommunication the air inlet chamber with the breach in even wind chamber, the bottom of casing be provided with the air-out groove that even wind chamber is linked together, 10-30 inclined contained angle have between air-out groove and the vertical face.

Preferably, a plurality of air guide grooves communicated with the air homogenizing cavity are further formed in the bottom of the shell at equal intervals.

Preferably, the air guide grooves are distributed at the bottom of the shell in an inclined mode, and an inclined included angle of 15-35 degrees is formed between the air guide grooves and the horizontal plane.

Preferably, the shell comprises a main body part and a side plate, the side plate is detachably and cover-mounted on one side of the main body part, the air outlet groove and the air guide groove are respectively formed in the lower end of the main body part, and the air inlet pipe is connected to the side wall of the side plate.

Preferably, the bottom of the main body portion extends upwards and is fixed with a plurality of reinforcing plates for contacting with the inner wall of the side plate, the reinforcing plates are distributed at equal intervals, mutually independent air outlet areas are formed between adjacent reinforcing plates, and the air guide groove is located in the air outlet areas.

Preferably, a clamping groove is formed in the bottom of the main body portion, a clamping plate is arranged at the lower end of the side plate in a downward extending mode, the clamping plate is inserted into the clamping groove, and the side plate is connected with the main body portion through a plurality of locking bolts.

Preferably, the top of the air inlet cavity is provided with an arc-shaped edge, and the arc-shaped edge is in an arch structure with a middle high and two low sides.

Preferably, the air inlet cavity is provided with a groove at a position corresponding to the outlet of the air inlet pipe.

Preferably, the housing is made of FR4 material.

Compared with the prior art, the utility model has the advantages that: the inner space is divided into an upper cavity and a lower cavity by arranging a transverse parting bead in the shell, so that two sections of ventilation of air in the hot air knife are realized; after the air enters the upper air inlet cavity from the air inlet pipe, the air enters the lower air homogenizing cavity through the notch on the parting bead, and the sectional structural design can play a role in buffering and adjusting, so that the pressure and the speed of the air flow flowing through the air inlet cavity can be homogenized when the air flow enters the air homogenizing cavity, and finally, the adjusted air flow is sprayed out from the air outlet groove at the bottom of the air homogenizing cavity, and a certain angle exists between the air outlet groove and the vertical direction, so that the spraying range of the air flow can be enlarged, and the blowing dead angle is avoided; through the improvement of the design of the internal section and the air outlet groove, the smoothness and the stability of the air flow in the hot air knife can be enhanced, the problem of uneven blowing existing in the existing product is solved, and the drying quality of the silicon wafer is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art are briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2 in accordance with the present utility model;

FIG. 4 is a schematic perspective view of the present utility model in an exploded state;

FIG. 5 is an enlarged partial schematic view of the present utility model at A in FIG. 4;

in the figure, 1, a shell; 2. an air inlet pipe; 3. a parting bead; 4. a notch; 5. an air inlet cavity; 6. a wind homogenizing cavity; 7. an air outlet groove; 8. an air guide groove; 9. a side plate; 10. a main body portion; 11. a clamping groove; 12. a clamping plate; 13. a reinforcing plate; 14. an arc edge; 15. a groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiment one: as shown in the figure, the hot air knife structure comprises a hollow shell 1 and an air inlet pipe 2 fixed on the shell 1, wherein a partition strip 3 which is transversely distributed is arranged in the shell 1, a space in the shell 1 is divided into an air inlet cavity 5 and an air homogenizing cavity 6 which are distributed up and down, gaps 4 used for communicating the air inlet cavity 5 and the air homogenizing cavity 6 are formed in the partition strip 3 at equal intervals, an air outlet groove 7 communicated with the air homogenizing cavity 6 is formed in the bottom of the shell 1, and an inclined included angle of 20 degrees is formed between the air outlet groove 7 and a vertical surface.

Embodiment two: as shown in the figure, unlike the first embodiment, a plurality of air guide grooves 8 communicated with the air homogenizing cavity 6 are also arranged at equal intervals at the bottom of the shell 1.

This design sets up a plurality of wind scoops 8 in casing 1 bottom equidistance interval, has realized communicating of even wind chamber 6 and a plurality of wind scoops 8, and the air-out area of hot-blast sword can be enlarged to this kind of design of a plurality of wind scoops 8, makes more air current follow wind scoops 8 blowout, increases the amount of wind of drying the silicon chip at every turn, and simultaneously, equidistant distribution along casing 1 bottom of a plurality of wind scoops 8 can make the air current of blowing beat on the silicon chip surface more evenly, improves the inhomogeneous problem of blowing that current hot-blast sword easily appears.

In this embodiment, the air guiding grooves 8 are distributed at the bottom of the housing 1 in an inclined manner, and an inclined included angle of 15 ° -35 ° is formed between the air guiding grooves 8 and the horizontal plane.

According to the design, the air guide grooves 8 are arranged at the bottom of the shell 1 in an inclined state and form a certain included angle with the horizontal plane, and the included angle is preferably 25 degrees, so that the angle adjustment of the nozzles of the air guide grooves 8 is realized, the design of the inclined air guide grooves 8 can more effectively control the air flow direction sprayed out of the air guide grooves 8, the air flow is aligned to the surface of a silicon wafer, and the purging contact area between the air flow and the surface of the silicon wafer is increased. Compared with the simple vertical air guide groove 8, the inclined air guide groove 8 can prevent air flow from forming blowing dead angles with the surface of the silicon wafer, ensure that the air flow can cover all areas of the silicon wafer, realize the air flow blowing with proper orientation and strength on the silicon wafer, and improve the adaptability of the hot air knife.

Embodiment III: as shown in the figure, unlike the second embodiment, the housing 1 includes a main body 10 and a side plate 9, the side plate 9 is detachably mounted on one side of the main body 10, the air outlet duct 7 and the air guide duct 8 are respectively opened at the lower end of the main body 10, and the air inlet duct 2 is connected to the side wall of the side plate 9.

In this embodiment, the bottom of the main body 10 extends upwards to fix a plurality of reinforcing plates 13 contacting with the inner wall of the side plate 9, the plurality of reinforcing plates 13 are distributed equidistantly, and mutually independent air outlet areas are formed between adjacent reinforcing plates 13, and the air guide grooves 8 are located in the air outlet areas.

The design realizes the disassembly of the internal structure of the hot air knife by dividing the shell 1 into two parts of a main body part 10 and a detachable side plate 9; the air outlet groove 7 and the air guide groove 8 are arranged at the lower end of the main body part 10 and can be directly butted with the silicon wafer to purge and dry; the air inlet pipe 2 is connected to the side wall of the side plate 9, the air inlet pipe 2 and the internal structure can be maintained through the detachable side plate 9, the split design improves the maintainability of the hot air knife, and the detachable side plate 9 can facilitate the inspection, cleaning and maintenance of the internal structure.

In this embodiment, a clamping groove 11 is formed in the bottom of the main body 10, a clamping plate 12 is disposed at the lower end of the side plate 9 in a downward extending manner, the clamping plate 12 is inserted into the clamping groove 11, and the side plate 9 is connected with the main body 10 through a plurality of locking bolts.

The design realizes the matching connection of the side plate 9 and the main body 10 by arranging the clamping groove 11 at the bottom of the main body 10 and arranging the clamping plate 12 which can be inserted into the clamping groove 11 at the lower end of the side plate 9; after the clamping plate 12 is inserted into the clamping groove 11, the side plate 9 and the main body part 10 are fixed through the plurality of locking bolts, so that the connection strength and stability between the main body part 10 and the side plate 9 can be further enhanced, compared with simple bolt connection, the clamping groove 11 matching technology can control the relative positions of the side plate 9 and the main body part 10 more accurately, meanwhile, the clamping structure can bear shearing force to a certain extent, and the overall rigidity of the hot air knife shell 1 is enhanced. In addition, the clamping structure can be rapidly disassembled and assembled, the side plate 9 can be separated only by loosening bolts during disassembly, and the clamping plate 12 is inserted again after maintenance to complete assembly.

Embodiment four: as shown in the figure, unlike the third embodiment, the top of the air inlet cavity 5 has an arc-shaped edge 14, and the arc-shaped edge 14 has an arch structure with a middle high and two low sides.

The design of the arched arc edge can ensure that the pressure and the speed of air are larger than those of two side areas in the middle area of the air inlet cavity 5 when the air flows through the air inlet cavity 5, so that the air flow flowing through the air inlet cavity 5 is converged with the notch 4 and then the pressure and the speed are uniformly distributed in the air homogenizing cavity 6; specifically, the arch structure at the middle high position accelerates the air speed, the low-lying positions at the two sides slow down the air speed, the confluence of the high-speed air and the low-speed air can play a role in turbulent flow, and the pressure and the speed between the air can be balanced. In addition, the arch structure can reduce the negative influence of the strong air injection from the air inlet on the air flow impact. In conclusion, the arched top design of the air inlet cavity 5 is beneficial to the direct injection of buffer air, so that the air is uniformly distributed in the air homogenizing cavity 6, a uniform and stable air outlet effect is generated, and the performance of the hot air knife is improved.

In this embodiment, the air inlet chamber 5 is provided with a recess 15 at a position corresponding to the outlet of the air inlet pipe 2.

The groove 15 can play a certain buffering and adjusting role, so that compressed air can not be violently and directly blown into the air inlet cavity 5 from the air inlet pipe 2, but is buffered through the groove 15, then uniformly enters the air inlet cavity 5, the effect of buffering and adjusting air inlet is achieved, and stable and uniform flow distribution of air in the air inlet cavity 5 is facilitated.

In this embodiment, the housing 1 is made of FR4 material.

FR4 is a glass fiber reinforced epoxy resin board and has the advantages of high mechanical strength, good thermal stability and lower cost; the shell 1 of the hot air knife is made of FR4 materials, so that the shell 1 has enough mechanical strength and rigidity, can bear the impact of internal high air pressure and air flow, and ensures the safe and stable operation of equipment. Compared with metal materials, the FR4 has the characteristics of smaller thermal expansion coefficient, longer service life and good thermal stability, can adapt to higher operating temperature in the hot air knife, and has lower production cost.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides a hot air knife structure, includes hollow casing and fixes the air-supply line on the casing, its characterized in that: the air inlet device comprises a shell, and is characterized in that a transverse division bar is arranged in the shell to divide the space in the shell into an air inlet cavity and an air homogenizing cavity which are distributed up and down, gaps which are used for communicating the air inlet cavity with the air homogenizing cavity are formed in the division bar at equal intervals, an air outlet groove which is communicated with the air homogenizing cavity is formed in the bottom of the shell, and an inclined included angle of 10-30 degrees is formed between the air outlet groove and a vertical surface.

2. The hot air knife structure according to claim 1, wherein: the bottom of the shell is also provided with a plurality of air guide grooves which are communicated with the air homogenizing cavity at equal intervals.

3. The hot air knife structure according to claim 2, wherein: the air guide grooves are distributed at the bottom of the shell in an inclined mode, and an inclined included angle of 15-35 degrees is formed between the air guide grooves and the horizontal plane.

4. A hot air knife structure according to claim 3, characterized in that: the shell comprises a main body part and a side plate, wherein the side plate is detachably and cover-mounted on one side of the main body part, the air outlet groove and the air guide groove are respectively formed in the lower end of the main body part, and the air inlet pipe is connected to the side wall of the side plate.

5. The hot air knife structure according to claim 4, wherein: the bottom of main part upwards extends and is fixed with a plurality of be used for with the reinforcing plate that the inner wall of curb plate contacted, a plurality of the reinforcing plate equidistance distributes, and is adjacent form mutually independent air-out region between the reinforcing plate, the wind-guiding groove is located in the air-out region.

6. The hot air knife structure according to claim 4, wherein: the bottom of main part has seted up a draw-in groove, the lower extreme downwardly extending of curb plate is provided with a cardboard, the cardboard inserts to set up in the draw-in groove, just the curb plate with be connected through a plurality of lock bolts between the main part.

7. The hot air knife structure according to claim 1, wherein: the top of the air inlet cavity is provided with an arc-shaped edge, and the arc-shaped edge is of an arch structure with high middle and low two sides.

8. The hot air knife structure according to claim 1, wherein: the air inlet cavity is provided with a groove at the position corresponding to the outlet of the air inlet pipe.

9. The hot air knife structure according to claim 1, wherein: the housing is made of FR4 material.