Clean workbench

Abstract

The utility model relates to the technical field of purification equipment, in particular to a clean bench which comprises a frame, a primary filter is fixedly mounted at the top of the frame, a high-efficiency filter is fixedly mounted below the primary filter, an air supply mechanism and a reflecting plate are fixedly mounted in the frame, and the reflecting plate is fixedly mounted below the high-efficiency filter. The air supply mechanism and the reflecting plate are located between the primary filter and the high-efficiency filter, and the reflecting plate is located above the air supply mechanism. The air purifier has the advantages that air output by the centrifugal impeller is blown to the position below the reflecting plate after being turned by the air guide bowl and then spreads to the periphery and the lower portion, so that the air pressure below the fixing plate and above the high-efficiency filter is uniform, the purified air can be uniformly discharged downwards through the high-efficiency filter, air in a working area flows uniformly, and the working efficiency is improved. Laminar flow is not disordered, it is guaranteed that a working area is clean enough, the sponge cushions are arranged on the inner wall of the air guiding bowl and below the reflecting plate, and the sponge cushions can buffer air and reduce noise.

Description

Technical Field

[0001] The utility model relates to the technical field of purification equipment, in particular to a clean workbench. Background Art

[0002] Clean bench is a purification equipment that provides a dust-free working environment. It is easy to use and has a simple structure. It has been widely used in various industrial and scientific research departments such as electronics, precision instruments, meters, and pharmaceuticals.

[0003] According to the direction of air laminar flow, clean workbenches are also divided into horizontal laminar flow clean workbenches and vertical laminar flow clean workbenches. The main structure of the vertical laminar flow clean workbench equipment is a primary filter, a centrifugal fan and a high-efficiency filter from top to bottom. After the centrifugal fan works, the external air is sucked into the space between the primary filter and the high-efficiency filter through the top of the primary filter. After the air is initially purified, it is discharged downward through the high-efficiency filter, thereby making the air on the workbench below the high-efficiency filter clean.

[0004] When the existing clean bench is in use, the air exhausted by the centrifugal fan is usually diffused in the horizontal direction. For example, in a vertical laminar flow clean bench disclosed in Chinese patent CN218658915U, the air exhausted by the centrifugal fan diffuses horizontally through the honeycomb sound absorbing plate. The air hits the side wall of the ventilation area at high speed and diffuses downward and toward the middle, and then is discharged downward through the high-efficiency filter. Therefore, there are the following defects:

[0005] Since the air diffuses horizontally and hits the side walls of the ventilation area before diffusing downward and toward the middle, the wind pressure near the side walls of the ventilation area is greater. Therefore, the air speed passing through the high-efficiency filter downward near the side walls of the ventilation area is faster, so the air flow rate at the side walls above the workbench is greater than the air flow rate in the middle, resulting in uneven air flow above the workbench and disordered laminar flow, which affects the cleanliness above the workbench. Utility Model Content

[0006] The purpose of the utility model is to solve at least one of the technical defects described in the background technology.

[0007] To this end, one purpose of the utility model is to provide a clean workbench, aiming to solve the problem of uneven air flow and disordered laminar flow in the clean workbench in the prior art, which affects the cleanliness level above the workbench.

[0008] In order to achieve the above-mentioned object, an embodiment of one aspect of the utility model provides a clean workbench, comprising a frame, characterized in that a primary filter is fixedly installed on the top of the frame, a high-efficiency filter is fixedly installed below the primary filter, an air supply mechanism and a reflector are fixedly installed inside the frame, the air supply mechanism and the reflector are located between the primary filter and the high-efficiency filter, and the reflector is located above the air supply mechanism;

[0009] The air supply mechanism includes a fixed plate, a motor is fixedly installed below the fixed plate, the output end of the motor passes through the top of the fixed plate, and the output end of the motor is fixedly connected to a centrifugal impeller, the top of the fixed plate is fixedly connected to an air guide bowl, and the opening of the air guide bowl faces upward, a hole groove is opened in the middle of the reflective plate, and an air intake pipe is fixedly connected in the hole groove in the middle of the reflective plate, and the air intake pipe corresponds to the middle of the centrifugal impeller.

[0010] Preferably, any of the above schemes has a sponge pad fixedly connected to the inner wall of the air guide bowl and the bottom of the reflective plate to buffer the wind speed and reduce wind dryness.

[0011] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0012] 1. The air output by the centrifugal impeller is turned by the air guide bowl and blown to the bottom of the reflective plate, and then spreads to the surroundings and downwards, so that the air pressure below the fixed plate and above the high-efficiency filter is uniform. Therefore, the purified air can be evenly discharged downward through the high-efficiency filter, making the air flow in the working area uniform and the laminar flow not turbulent, ensuring that the working area is sufficiently clean.

[0013] 2. By setting a sponge pad on the inner wall of the air guide bowl and under the reflective plate, the sponge pad itself is soft and has dense gaps inside. Therefore, after the air delivered by the centrifugal fan comes into contact with the sponge pad, the sponge pad can buffer the air and reduce the wind speed, thereby reducing the noise to a certain extent.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a structural schematic diagram according to the utility model.

[0017] Figure 2 It is a structural schematic diagram of the framework according to the utility model.

[0018] Figure 3 It is a schematic cross-sectional structure diagram of the air supply mechanism and the reflector according to the utility model.

[0019] Figure 4 It is a structural schematic diagram of a primary filter and a high efficiency filter according to the utility model.

[0020] Wherein: 1. frame, 11. first fixed frame, 12. second fixed frame, 13. sealing ring, 14. threaded hole, 15. supporting leg, 2. primary filter, 21. first positioning frame, 22. first through hole, 3. high efficiency filter, 31. second positioning frame, 32. second through hole, 4. air supply mechanism, 41. fixing plate, 42. motor, 43. centrifugal impeller, 44. air guide bowl, 45. supporting rod, 46. sponge pad, 5. reflecting plate, 51. air inlet pipe, 6. working plate, 7. enclosure, 71. transparent plate, 72. transparent door panel. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The utility model provides a clean workbench.

[0024] Embodiment 1:

[0025] like Figure 1-2 As shown, it includes a frame 1, characterized in that a primary filter 2 is fixedly installed on the top of the frame 1, a high-efficiency filter 3 is fixedly installed below the primary filter 2, an air supply mechanism 4 and a reflector 5 are fixedly installed inside the frame 1, the air supply mechanism 4 and the reflector 5 are located between the primary filter 2 and the high-efficiency filter 3, and the reflector 5 is located above the air supply mechanism 4;

[0026] like Figure 3As shown, the air supply mechanism 4 includes a fixed plate 41, a motor 42 is fixedly installed below the fixed plate 41, the output end of the motor 42 extends to the top of the fixed plate 41, and a bearing is fixedly installed inside the fixed plate 41, the fixed plate 41 is rotatably connected to the output end of the motor 42 through the bearing, and the output end of the motor 42 is fixedly connected to a centrifugal impeller 43, the motor 42 drives the centrifugal impeller 43 to rotate, so that air enters through the shaft core of the centrifugal impeller 43, and then is transported to the surroundings, the top of the fixed plate 41 is fixedly connected to an air guide bowl 44, and the air guide bowl 44 The opening faces upward, and the bowl wall of the air guide bowl 44 is an arc surface. The air transported to the surroundings by the centrifugal impeller 43 passes through the air guide bowl 44 and then turns to blow toward the reflector 5 above. After contacting the reflector 5, the air spreads to the surroundings and downward, gradually squeezing the air below the fixed plate 41 downward to pass through the high-efficiency filter 3. A hole groove is opened in the middle of the reflector 5, and an air intake pipe 51 is fixedly connected to the hole groove in the middle of the reflector 5. The air intake pipe 51 corresponds to the middle of the centrifugal impeller 43, and can guide the air above the reflector 5 to the middle of the centrifugal impeller 43.

[0027] Specifically, Figure 1-2 As shown, the frame 1 includes a first fixed frame 11 and a second fixed frame 12, the first fixed frame 11 and the second fixed frame 12 correspond to each other up and down, and the four corners of the first fixed frame 11 and the second fixed frame 12 are fixedly connected with supporting legs 15, the primary filter 2 is fixedly installed in the first fixed frame 11 to fix the primary filter 2, and the high efficiency filter 3 is fixedly installed in the second fixed frame 12 to fix the high efficiency filter 3.

[0028] Furthermore, support rods 45 are fixedly connected at the four corners of the fixed plate 41, and one end of the support rod 45 away from the fixed plate 41 is fixedly connected to the support leg 15 to fix the air supply mechanism 4, and the four corners of the reflective plate 5 are fixedly connected to the support leg 15 to fix the reflective plate 5.

[0029] Further, such as Figure 2 and Figure 4 As shown, threaded holes 14 are provided on the top of the first fixed frame 11 and the bottom of the second fixed frame 12, and the outer surface of the primary filter 2 is fixedly connected with a first positioning frame 21, and a first through hole 22 is provided on the top of the first positioning frame 21. After the primary filter 2 is placed in the first fixed frame 11, bolts are passed through the first through holes 22 and threadedly connected to the threaded holes 14 above the first fixed frame 11, thereby achieving the purpose of fixing the primary filter 2, and the outer surface of the high-efficiency filter 3 is fixedly connected with a second positioning frame 31, and a second through hole 32 is provided on the top of the second positioning frame 31. The high-efficiency filter 3 is inserted from the bottom of the second fixed frame 12, and then bolts are passed through the second through holes 32 and threadedly connected to the threaded holes 14 below the second fixed frame 12, thereby achieving the purpose of fixing the high-efficiency filter 3.

[0030] Furthermore, the inner walls of the first fixed frame 11 and the second fixed frame 12 are fixedly connected with a sealing ring 13. The sealing ring 13 in the first fixed frame 11 contacts the bottom of the primary filter 2, thereby playing a sealing role. The sealing ring 13 in the second fixed frame 12 contacts the top of the high-efficiency filter 3, thereby playing a sealing role.

[0031] Furthermore, a work plate 6 is fixedly connected to the interior of the frame 1. The work plate 6 is located below the high-efficiency filter 3. The work area is located above the work plate 6. A plurality of evenly distributed holes are provided on the work plate 6 for discharging air downward.

[0032] Embodiment 2:

[0033] like Figure 3 As shown, on the basis of the first embodiment, the inner wall of the air guide bowl 44 and the bottom of the reflection plate 5 are both fixedly connected with a sponge pad 46 .

[0034] Embodiment three:

[0035] like Figure 1 As shown, on the basis of Example 1 or Example 2, the first fixed frame 11 and the second fixed frame 12 are fixedly connected with enclosures 7 on all sides, and the primary filter 2 and the high-efficiency filter 3 are provided with a ventilation area. The enclosure 7 is used to close the ventilation area to ensure that the air is transmitted from top to bottom and does not diffuse to the outside. The left and right sides and the back of the second fixed frame 12 and the work board 6 are fixedly connected with transparent panels 71 to facilitate observation of the working area. The front sides of the second fixed frame 12 and the work board 6 are slidably connected with transparent door panels 72. Sliding the transparent door panels 72 can open the working area. The transparent panels 71 and the transparent door panels 72 are both made of transparent glass or transparent acrylic panels, and the connection method of the transparent door panel 72 on the front side is the same as the existing well-known technology without any improvement, so it will not be described in detail in this application.

[0036] The working principle of the utility model is as follows: when in use, the motor 42 is started to drive the centrifugal impeller 43 to rotate, the centrifugal impeller 43 draws air above the reflecting plate 5 through the air inlet pipe 51, and the external air enters above the reflecting plate 5 after being purified by the primary filter 2. The air output by the centrifugal impeller 43 is turned by the air guide bowl 44 and blown to the bottom of the reflecting plate 5, and then spreads to the surroundings and downwards, squeezing the air below the fixed plate 41, so that it passes through the high-efficiency filter 3 and enters the working area above the working plate 6. The air in the working area flows downward with the air above, and is finally discharged downward from the holes on the working plate 6.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. Start the motor 42 to drive the centrifugal impeller 43 to rotate. The air output by the centrifugal impeller 43 is turned by the air guide bowl 44 and blown to the bottom of the reflective plate 5, and then spreads to the surroundings and bottom, squeezing the air under the fixed plate 41, so that it passes through the high-efficiency filter 3 and enters the working area above the working plate 6, so that the air pressure under the fixed plate 41 and above the high-efficiency filter 3 is uniform, so that the purified air can be evenly discharged downward through the high-efficiency filter 3, so that the air flow in the working area is uniform and the laminar flow is not turbulent, ensuring that the working area is sufficiently clean.

[0039] 2. By arranging a sponge pad 46 on the inner wall of the air guide bowl 44 and under the reflector 5, the sponge pad 46 itself is soft and has dense gaps inside. Therefore, after the air transported by the centrifugal fan contacts the sponge pad 46, the sponge pad 46 can buffer the air and reduce the wind speed, thereby reducing the noise to a certain extent.

Claims

1. A clean workbench, comprising a frame (1), characterized in that: A primary filter (2) is fixedly mounted on the top of the frame (1), a high-efficiency filter (3) is fixedly mounted below the primary filter (2), an air supply mechanism (4) and a reflector (5) are fixedly mounted inside the frame (1), the air supply mechanism (4) and the reflector (5) are located between the primary filter (2) and the high-efficiency filter (3), and the reflector (5) is located above the air supply mechanism (4); The air supply mechanism (4) comprises a fixing plate (41), a motor (42) is fixedly mounted below the fixing plate (41), an output end of the motor (42) extends to the top of the fixing plate (41), and a centrifugal impeller (43) is fixedly connected to the output end of the motor (42), an air guide bowl (44) is fixedly connected to the top of the fixing plate (41), and the opening of the air guide bowl (44) faces upward, a hole groove is provided in the middle of the reflecting plate (5), and an air intake pipe (51) is fixedly connected in the hole groove in the middle of the reflecting plate (5), and the air intake pipe (51) corresponds to the middle of the centrifugal impeller (43).

2. The clean bench according to claim 1, characterized in that: The inner wall of the air guide bowl (44) and the bottom of the reflective plate (5) are both fixedly connected with a sponge pad (46).

3. The clean workbench according to claim 1, characterized in that: The frame (1) comprises a first fixed frame (11) and a second fixed frame (12), the first fixed frame (11) and the second fixed frame (12) correspond to each other up and down, and the four corners of the first fixed frame (11) and the second fixed frame (12) are fixedly connected with supporting legs (15), the primary filter (2) is fixedly installed in the first fixed frame (11), and the high efficiency filter (3) is fixedly installed in the second fixed frame (12).

4. The clean workbench according to claim 3, characterized in that: The four corners of the fixing plate (41) are fixedly connected with support rods (45), one end of the support rod (45) away from the fixing plate (41) is fixedly connected to the support leg (15), and the four corners of the reflective plate (5) are fixedly connected to the support leg (15).

5. The clean workbench according to claim 3, characterized in that: The top of the first fixing frame (11) and the bottom of the second fixing frame (12) are both provided with threaded holes (14); the outer surface of the primary filter (2) is fixedly connected to a first positioning frame (21); the top of the first positioning frame (21) is provided with a first through hole (22); the outer surface of the high efficiency filter (3) is fixedly connected to a second positioning frame (31); the top of the second positioning frame (31) is provided with a second through hole (32).

6. The clean workbench according to claim 5, characterized in that: The inner walls of the first fixing frame (11) and the second fixing frame (12) are both fixedly connected with sealing rings (13).

7. The clean workbench according to claim 6, characterized in that: A working plate (6) is fixedly connected to the interior of the frame (1), and the working plate (6) is located below the high-efficiency filter (3).

8. The clean bench according to claim 7, characterized in that: The first fixed frame (11) and the second fixed frame (12) are fixedly connected with enclosure plates (7) on all sides, the left and right sides and the back side of the second fixed frame (12) and the working board (6) are fixedly connected with transparent plates (71), and the front side of the second fixed frame (12) and the working board (6) is slidably connected with a transparent door plate (72).

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