A detachable air knife with uniform air output

Abstract

The present invention discloses a detachable wind knife with uniform air outlet, comprising a wind knife body, the wind knife body comprising an air inlet pipe with one end closed and the other end open and connected to a fan, a connecting plate fixed from the bottom on the side of the air inlet pipe, an air outlet plate fixed at the bottom of the connecting plate, an air outlet provided on the air outlet plate, and an equalizing air cavity for evenly guiding the airflow in the air inlet pipe to the air outlet provided between the air inlet pipe, the connecting plate and the air outlet plate. The wind knife of the present invention has a simple structure, and improves the flow direction of the internal airflow and increases stability by changing the internal equalizing air cavity structure, thereby improving the problems of uneven blowing wind force and easy deformation of the wind knife.

Description

[Technical field]

[0001] The invention relates to the technical field of wind knives, and in particular to a detachable wind knife with uniform air output. [Background technology]

[0002] Air knives are widely used in the fields of drying and cleaning such as liquid removal and dust removal in industry. An air inlet pipe is installed at one end of the air knife. When this method is used on a long air knife, it is easy for the air outlet far away from the end of the air inlet pipe to have a smaller wind force, resulting in uneven wind force from the air knife. The air knife has a long and thin air outlet. Under the action of the internal high-pressure airflow and the friction between the high-speed airflow and the two walls of the air outlet, the air outlet of the air knife is easily deformed, resulting in uneven wind force from the air knife, which can easily reduce the cleaning and drying effect, and there will be liquid residue and unclean cleaning.

[0003] The present invention is made based on this situation. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to provide a detachable wind knife with simple structure and uniform air output, which improves the flow direction of the internal airflow and increases the stability by changing the internal flow uniformity air cavity structure, thereby improving the problems of uneven blowing wind force and easy deformation of the wind knife.

[0005] In order to solve the above-mentioned technical problems, the present invention discloses a detachable wind knife with uniform air outlet, comprising a wind knife body, wherein the wind knife body comprises an air inlet pipe with one end closed and the other end open and connected to a fan, a connecting plate is fixed from the bottom on the side of the air inlet pipe, an air outlet plate is fixed at the bottom of the connecting plate, an air outlet is arranged on the air outlet plate, and an equalizing air chamber is arranged between the air inlet pipe, the connecting plate and the air outlet plate for uniformly guiding the airflow in the air inlet pipe to flow out of the air outlet.

[0006] As described above, a detachable wind knife with uniform air outlet is provided, the air outlet area of ​​the air inlet duct is provided with a first air duct for directing the airflow entering the air inlet duct to the connecting plate, the connecting plate is provided with a second air duct for directing the airflow entering the connecting plate to the air outlet plate, the air outlet plate is provided with a third air duct for directing the airflow entering the air outlet plate to the air outlet, the first air duct, the second air duct and the third air duct are connected to form a uniform flow air cavity.

[0007] As described above, a detachable wind knife with uniform air output, the first air duct includes strip-shaped first air outlet holes evenly spaced in the air outlet area at the bottom of the air inlet pipe, and a first spacing strip is provided between two adjacent first air outlet holes.

[0008] In the detachable wind knife with uniform air output as described above, the second air duct is a cavity that runs through the upper and lower sides of the connecting plate, and the cavity is sealed and connected to the entire first air duct.

[0009] As described above, a detachable wind knife with uniform air outlet, the third air duct includes upper air inlets evenly spaced in the upper part of the air outlet plate, middle air holes evenly spaced in the middle part of the air outlet plate and lower air outlets evenly spaced at the bottom of the middle air holes, a second spacing bar is arranged between two adjacent upper air inlets, and a third spacing bar is arranged between two adjacent middle air holes.

[0010] As described above, a detachable wind knife with uniform air output, the total ventilation area of ​​the first air duct is smaller than the total ventilation area of ​​the second air duct, the total ventilation area of ​​the upper air inlet in the third air duct is smaller than the total ventilation area of ​​the second air duct, and the total ventilation area of ​​the middle air holes is smaller than the total ventilation area of ​​the upper air inlet.

[0011] In the detachable wind knife with uniform air output as described above, the second spacer is located directly above the third spacer, the second spacer and the third spacer have the same width, and the spacing between two adjacent second spacers is more than twice the spacing between two adjacent third spacers.

[0012] In the detachable wind knife with uniform air output as described above, the upper air inlet is a strip-shaped hole, the middle air hole is a cylindrical hole, and the lower air outlet is a conical hole.

[0013] As described above, a detachable wind knife with uniform air outlet, the air outlet is a slit structure that is inclined away from the center line toward one side of the air outlet plate and has an inclination relative to the third air duct.

[0014] As described above, a detachable wind knife with uniform air outlet is provided, wherein the connecting plate and the air outlet plate are detachably connected and fixed, the bottom of the connecting plate is provided with a T-shaped groove with an opening facing downward, and the top of the air outlet plate is provided with a T-shaped boss matching the T-shaped groove, and the T-shaped boss of the air outlet plate is embedded in the T-shaped groove and fixed to the connecting plate by screws.

[0015] As described above, the detachable wind knife with uniform air output has a metal reinforcement cover for strengthening the rigidity of the air outlet pipe on the outer side of the wind knife body.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. An even-flow air chamber for evenly guiding the airflow in the air inlet duct to the air outlet is provided between the air inlet duct, the connecting plate and the air outlet plate of the present invention. The even-flow air chamber is formed by connecting the first air duct, the second air duct and the third air duct, wherein the first air duct comprises a plurality of groups of first strip-shaped air outlet holes uniformly spaced at the bottom of the air inlet duct, a first spacing bar is provided between two adjacent first air outlet holes, the second air duct is a cavity running through the upper and lower sides of the connecting plate, the cavity is sealed and connected to the entire first air duct, the third air duct comprises upper air inlets uniformly spaced at intervals at the upper part of the air outlet plate, middle air holes uniformly spaced at intervals at the middle part of the air outlet plate and lower air outlets uniformly spaced at the bottom of the middle air holes, a second spacing bar is provided between the two adjacent upper air inlets, a third spacing bar is provided between the two adjacent middle air holes The wind knife body is in the shape of a long strip. After the high-speed wind flow enters the air inlet pipe, the wind flow at the end far from the air inlet pipe flows back out from the first air duct, thereby increasing the wind force at the position far from the air inlet pipe. The high-speed wind flow is divided and flows out from the multiple groups of strip-shaped first air outlet holes in the first air duct, and then enters the cavity in the connecting plate. The wind flow is mixed in the cavity, and the pressure difference between the front and rear ends in the entire air cavity becomes smaller, and the wind force is balanced, and then enters the third air duct in the air outlet plate. The wind flow passes through multiple groups of upper air inlets, middle air holes and densely distributed lower air outlets in turn. At this time, the pressure difference between the front and rear ends in the entire air outlet plate is very small, and the overall air outlet is stable and uniform. The provision of the first, second and third spacer strips can greatly increase the overall strength of the wind knife, thereby reducing the deformation of the wind knife under the extrusion of high-pressure gas.

[0018] 2. The ventilation area of ​​the uniform flow air cavity of the present invention changes from small to large and then to small, that is, the total ventilation area of ​​the first air duct is smaller than the total ventilation area of ​​the second air duct, the total ventilation area of ​​the upper air inlet in the third air duct is smaller than the total ventilation area of ​​the second air duct, and the total ventilation area of ​​the middle air holes is smaller than the total ventilation area of ​​the upper air inlet, so that the air outlet is more uniform.

[0019] 3. The lower air outlet of the present invention is a conical opening, which accelerates the wind flow and can also increase the rigidity of the lower air outlet, reduce the impact of friction and heat between the lower air outlet and the high-speed air flow, and maintain the consistency of the size of the lower air outlet, thereby improving the overall stability of the wind knife and the stability of the lower air outlet.

[0020] 4. The air outlet of the present invention is a slit structure that is inclined toward one side of the air outlet plate and has an inclination relative to the third air duct. The high-speed airflow rubs against the inclined air outlet and generates a hot airflow, which dries the liquid on the surface of the object without the need for an external heater.

[0021] 5. The outer side of the wind knife body of the present invention is covered with a metal reinforcement cover for strengthening the rigidity of the air outlet pipe. The air outlet area of ​​the air inlet pipe is covered with a reinforcement cover made of metal material. The air outlet area is located in the middle section of the wind knife and is in the shape of a slender strip. The metal reinforcement cover can increase the rigidity of the air outlet area, so that the wind knife can maintain sufficient rigidity when it is long, and can also increase the tolerance to changes in ambient temperature, thereby avoiding bending and deformation of the air inlet pipe due to long-term use.

Brief Description of the Drawings

[0022] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 is a cross-sectional view of the present invention along the radial direction of the air inlet pipe;

[0025] Figure 3 is a cross-sectional view of the present invention along the axial direction of the air inlet pipe;

[0026] Figure 4 The present invention Figure 3 The enlarged view of the cross-sectional view B shown;

[0027] Figure 5 It is a structural schematic diagram of the air outlet plate of the present invention;

[0028] Figure 6 The present invention Figure 5 The enlarged view of the structure schematic diagram A shown;

[0029] Figure 7 It is a schematic diagram of an installation method of the present invention. [Specific implementation method]

[0030] The present invention will be further described below in conjunction with the accompanying drawings:

[0031] like Figure 1-6 A detachable wind knife with uniform air outlet is shown, comprising a wind knife body 1, wherein the wind knife body 1 comprises an air inlet pipe 2 with one end closed and the other end open and connected to a fan, a connecting plate 3 is fixed from the bottom on the side of the air inlet pipe 2, an air outlet plate 4 is fixed at the bottom of the connecting plate 3, an air outlet plate 4 is provided on the air outlet plate 4, an air outlet 41 is provided, and an equalizing air cavity for evenly guiding the airflow in the air inlet pipe 2 to flow out of the air outlet 41 is provided between the air inlet pipe 2, the connecting plate 3 and the air outlet plate 4. After the high-speed airflow enters from one end of the air inlet pipe, it flows out through the equalizing air cavity, and the air outlet is uniform.

[0032] The air outlet area of ​​the air inlet pipe 2 is provided with a first air duct 5 for conducting the airflow entering the air inlet pipe 2 to the connecting plate 3, the connecting plate 3 is provided with a second air duct 6 for conducting the airflow entering the connecting plate 3 to the air outlet plate 4, the air outlet plate 4 is provided with a third air duct 7 for conducting the airflow entering the air outlet plate 4 to the air outlet 41, the first air duct 5, the second air duct 6 and the third air duct 7 are connected to form a uniform flow air cavity, the wind knife body is long and strip-shaped, after the high-speed airflow enters the air inlet pipe, the airflow at the end far from the air inlet pipe refluxes and flows out from the first air duct, thereby increasing the wind force at a position far from the air inlet pipe, and the airflow flows out through multiple air ducts in the uniform flow air cavity, and the air outlet is uniform.

[0033] Preferably, the air outlet area is located in the middle of the air inlet pipe, and the length of the air outlet area is smaller than the length of the air inlet pipe.

[0034] The first air duct 5 includes strip-shaped first air outlet holes 51 that are evenly spaced in the air outlet area at the bottom of the air inlet pipe 2, and a first spacing bar 52 is arranged between two adjacent first air outlet holes 51. After the high-speed airflow enters the air inlet pipe from one end along the axial direction of the air inlet pipe, the airflow at the front and rear ends of the air inlet pipe is diverted and flows out from the multiple groups of strip-shaped first air outlet holes of the air inlet pipe. The arrangement of the spacing bar can greatly increase the strength of the air outlet area of ​​the air inlet pipe, thereby reducing the deformation caused by the extrusion of the high-pressure gas.

[0035] The second air duct 6 is a cavity 61 that runs through the upper and lower sides of the connecting plate 3. The cavity 61 seals and connects the entire first air duct 5. The high-speed airflow is diverted from the first air duct and enters the second air duct. The airflow is mixed in the cavity, and the pressure difference between the front and rear ends in the entire air cavity becomes smaller, so that the wind force is balanced.

[0036] The third air duct 7 includes upper air inlets 71 evenly spaced in the upper section of the air outlet plate 4, middle air holes 72 evenly spaced in the middle section of the air outlet plate 4, and lower air outlets 721 evenly spaced at the bottom of the middle air holes 72. A second spacing bar 74 is provided between two adjacent upper air inlets 71, and a third spacing bar 75 is provided between two adjacent middle air holes 72. The wind flow entering the third air duct passes through multiple groups of upper air inlets, middle air holes and densely distributed lower air outlets in sequence and flows out. At this time, the pressure difference between the front and rear ends of the entire air outlet plate is very small, and the overall air outlet is stable and uniform. The second spacing bar and the third spacing bar can greatly increase the overall strength of the air outlet plate, thereby reducing the deformation caused by the extrusion of high-pressure gas.

[0037] The total ventilation area of ​​the first air duct 5 is smaller than the total ventilation area of ​​the second air duct 6, the total ventilation area of ​​the upper air inlet 71 in the third air duct 7 is smaller than the total ventilation area of ​​the second air duct 6, the total ventilation area of ​​the middle air holes 72 is smaller than the total ventilation area of ​​the upper air inlet 71, and the ventilation area of ​​the uniform flow air cavity changes from small to large and then to small, making the air outlet more uniform.

[0038] The number of the upper air inlets 71 in the third air duct 7 is less than the number of the middle air holes 72 .

[0039] The second spacer bar 74 is located directly above the third spacer bar 75. The second spacer bar 74 and the third spacer bar 75 have the same width. The spacing between two adjacent second spacer bars 74 is more than twice the spacing between two adjacent third spacer bars 75. High-speed airflow can smoothly enter the middle air hole 72 from the upper air inlet 71.

[0040] In order to allow the high-speed airflow to pass smoothly in the third air duct, the upper air inlet 71 is a strip hole, the middle air hole 72 is a cylindrical hole, and the lower air outlet 721 is a conical hole. The middle air hole 72 can also be a cylindrical shape. The conical mouth accelerates the airflow and increases the rigidity of the lower air outlet. It can reduce the impact of the friction and heat between the lower air outlet and the high-speed airflow, maintain the consistency of the size of the lower air outlet, thereby improving the overall stability of the wind knife and the stability of the lower air outlet.

[0041] The air outlet 41 is a thin slit structure that is inclined toward one side of the air outlet plate 4 and deviates from the center line, thereby having an inclination relative to the third air duct 7. The high-speed airflow rubs against the inclined thin air outlet and generates a hot airflow, which dries the liquid on the surface of the object without the need for an external heater.

[0042] The connecting plate 3 and the air outlet plate 4 are detachably connected and fixed, and a T-shaped groove with an opening facing downward is provided at the bottom of the connecting plate 3, and a T-shaped boss matching the T-shaped groove is provided at the top of the air outlet plate 4. The T-shaped boss of the air outlet plate 4 is embedded in the T-shaped groove and fixed to the connecting plate 3 by screws 9, so as to facilitate cleaning of the air duct inside the air outlet plate. The air outlet plate 4 can have various heights or various fine air outlets, which can be embedded in the connecting plate 3 and fixed with screws 9 to form various types of wind knives. The air outlet plate can be removed and replaced if the air outlet is severely deformed or blocked after long-term use, so as to reduce maintenance costs.

[0043] The outside of the wind knife body 1 is covered with a metal reinforcement cover 8 for strengthening the rigidity of the air outlet pipe 2. The air outlet area of ​​the air inlet pipe 2 is covered with a reinforcement cover made of metal material. The cross-section of the metal reinforcement cover is trapezoidal. The air outlet area is located in the middle section of the wind knife and is in the shape of a slender strip. The metal reinforcement cover can increase the rigidity of the air outlet area, so that the wind knife can maintain sufficient rigidity when it is long, and can also increase tolerance to changes in ambient temperature to avoid bending and deformation of the air inlet pipe due to long-term use.

[0044] The air inlet pipe 2, the metal reinforcement cover 8, the connecting plate 3 and the air outlet plate 4 are preferably of a centrally symmetrical structure.

[0045] The air knife of the present invention can be installed on the dryer cabinet, such as Figure 7As shown, two upper and lower wind knives can be installed on the dryer housing, and the two ends of the wind knives are fixed on the dryer housing. The air outlets of the two wind knives are aligned with the board inlet direction of the circuit board 10. One end of the air inlet pipe of the wind knife is bonded with a plug 11, and the other end is connected to an external fan. When working, the fan allows the compressed air to enter the air inlet pipe 2 through the quick connector, and the high-speed air flow is diverted and diverted through the first air duct on the air inlet pipe 2 to enter the second air duct of the connecting plate 3, and then enter the third air duct of the air outlet plate 4, and finally blown out evenly from the air outlet 41 with an inclined slit structure. The high-speed air flow rubs against the air outlet and generates a hot air flow to dry and dry the liquid on the surface of the circuit board 10. In addition, the wind speed and pressure can be adjusted by replacing the air outlet plates 4 of different heights to achieve a satisfactory drying effect for circuit boards 10 of different thicknesses.

[0046] The upper air knife of the present invention can be installed between two rollers 12, and the lower air knife can be replaced by one roller 12 to play a supporting role.

Claims

1. A detachable wind knife with uniform air flow, characterized in that: The invention comprises an air knife body (1), wherein the air knife body (1) comprises an air inlet pipe (2) having one end closed and the other end open and connected to a fan, a connecting plate (3) being fixed from the bottom to the side of the air inlet pipe (2), an air outlet plate (4) being fixed at the bottom of the connecting plate (3), an air outlet port (41) being provided on the air outlet plate (4), and an air flow balancing air cavity being provided between the air inlet pipe (2), the connecting plate (3) and the air outlet plate (4) for evenly guiding the air flow in the air inlet pipe (2) to flow out through the air outlet port (41), the air inlet pipe (2) and the connecting plate (3). The air outlet area of ​​the pipe (2) is provided with a first air duct (5) for guiding the airflow entering the air inlet pipe (2) to the connecting plate (3); the connecting plate (3) is provided with a second air duct (6) for guiding the airflow entering the connecting plate (3) to the air outlet plate (4); the air outlet plate (4) is provided with a third air duct (7) for guiding the airflow entering the air outlet plate (4) to the air outlet (41); the first air duct (5), the second air duct (6) and the third air duct (7) are connected to form a uniform flow air cavity; the first air duct (5) comprises Strip-shaped first air outlet holes (51) are evenly spaced in the air outlet area at the bottom of the air inlet pipe (2), a first spacing strip (52) is provided between two adjacent first air outlet holes (51), the second air duct (6) is a cavity (61) that runs through the upper and lower sides of the connecting plate (3), the cavity (61) seals and communicates with the entire first air duct (5), the third air duct (7) comprises an upper air inlet (71) evenly spaced in the upper section of the air outlet plate (4), a middle air hole (71) evenly spaced in the middle section of the air outlet plate (4), and a middle air hole (71) evenly spaced in the middle section of the air outlet plate (4). 2) and lower air outlets (721) evenly distributed at the bottom of the middle air holes (72), a second spacing bar (74) is provided between two adjacent upper air inlets (71), and a third spacing bar (75) is provided between two adjacent middle air holes (72), the wind knife body (1) is in the shape of a long strip, after the high-speed airflow enters the air inlet pipe (2), the airflow at the end far from the air inlet pipe (2) flows back out from the first air duct (5), the air outlet area is located in the middle of the air inlet pipe (2), and the length of the air outlet area is less than the length of the air inlet pipe (2).

2. The detachable air knife with uniform air flow according to claim 1, characterized in that: The total ventilation area of ​​the first air duct (5) is smaller than the total ventilation area of ​​the second air duct (6), the total ventilation area of ​​the upper air inlet (71) in the third air duct (7) is smaller than the total ventilation area of ​​the second air duct (6), and the total ventilation area of ​​the middle air holes (72) is smaller than the total ventilation area of ​​the upper air inlet (71).

3. The detachable air knife with uniform air flow according to claim 2, characterized in that: The second spacer bar (74) is located directly above the third spacer bar (75); the second spacer bar (74) and the third spacer bar (75) have the same width; and the distance between two adjacent second spacer bars (74) is more than twice the distance between two adjacent third spacer bars (75).

4. The detachable wind knife with uniform air flow according to claim 2, characterized in that: The upper air inlet (71) is a strip-shaped hole, the middle air hole (72) is a cylindrical hole, and the lower air outlet (721) is a conical hole.

5. The detachable wind knife with uniform air flow according to claim 1, characterized in that: The air outlet (41) is a slit structure that is inclined away from the center line toward one side of the air outlet plate (4) and has an inclination relative to the third air duct (7).

6. The detachable wind knife with uniform air flow according to claim 1, characterized in that: The connecting plate (3) and the air outlet plate (4) are detachably connected and fixed. The bottom of the connecting plate (3) is provided with a T-shaped groove with an opening facing downward, and the top of the air outlet plate (4) is provided with a T-shaped boss that matches the T-shaped groove. The T-shaped boss of the air outlet plate (4) is embedded in the T-shaped groove and fixed to the connecting plate (3) by screws (9).

7. A detachable wind knife with uniform air flow according to any one of claims 1 to 6, characterized in that: The outer side of the wind knife body (1) is covered with a metal reinforcement cover (8) for reinforcing the rigidity of the air outlet pipe (2).

Images