A clean bench with replaceable filter core

Abstract

This utility model discloses a clean workbench with a quick-replaceable filter element, comprising a main body, an air inlet chamber at the top of the main body, several air inlets at the top of the air inlet chamber, a fan at a corresponding position below the air inlets, a primary filtration device at the top of the air inlets, and several detachable filtration devices at the bottom of the air inlet chamber. Each detachable filtration device includes an outer frame, and several filter units are horizontally arranged within the outer frame. Each filter unit includes filter paper, a connecting frame, and a perforated plate. A workbench surface is provided on the main body, and a return air chamber is provided below the workbench surface. An airflow control plate is provided on the duct. This utility model has a reasonable structural design. When a partial filter unit needs to be replaced, it can be directly pulled out for replacement. When overall maintenance is required, the entire detachable filtration device can be removed by a snap-fit ​​method to maintain and replace the parts. Return air can be adjusted according to the required return air ratio. The operation is convenient and the maintenance time is short.

Description

Technical Field

[0001] This utility model relates to clean benches, and in particular to a clean bench with a quick-change filter element. Background Technology

[0002] Currently, clean benches are divided into two types: horizontal flow and vertical flow. Vertical flow clean benches are frequently used in biological dressing experiments, cutting, and production. They are used for experimental cell culture to prevent microbial contamination and ensure the accuracy of experiments. During use, when the filter cartridge of the original workbench needs to be replaced due to contamination, the front panel and filter cartridge need to be disassembled with screws. Since they are all fixed with bolts, the space at the far end of the bolts is narrow and not easy to operate, making filter cartridge replacement troublesome. Sometimes, the entire filtration device needs to be disassembled, resulting in long maintenance time and high replacement difficulty. Utility Model Content

[0003] To address the aforementioned technical problem of cumbersome filter replacement, this utility model provides a clean workbench with quick filter replacement capabilities. The workbench includes a main body, an air inlet chamber at its top, several air inlets at the top of the air inlet chamber, a fan positioned below each air inlet, a primary filtration device at the top of each air inlet, and several detachable filtration devices at the bottom of the air inlet chamber. Each detachable filtration device has slots on both sides, which are fixed to the main body. A rotating locking plate is located at the end of each slot to hold the detachable filtration device in place. Each detachable filtration device includes an outer frame, within which several filter units are horizontally arranged. Each filter unit includes filter paper and a connecting frame, with the filter paper positioned in the center of the connecting frame. A workbench surface is provided on the main body, and a return air chamber is located below the workbench surface. Ventilation holes are located at the front and rear ends of the workbench surface, communicating with the return air chamber. The return air chamber is connected to the air inlet via a pipe, and an airflow control plate is installed on the pipe.

[0004] The air inlet cavity includes a front panel, which is detachable. A hook is provided on the front panel, and a hook seat is provided on the main body at the position corresponding to the hook.

[0005] A filter screen is installed at the outlet of the return air chamber.

[0006] The rotating plate includes a rotating shaft, a handle, and a plate, with the handle and plate respectively located on both sides of the rotating shaft.

[0007] The plug-in frame includes a left plug-in frame and a right plug-in frame. The plug-in of the left plug-in frame faces upward and the plug-in of the right plug-in frame faces downward. The filter units are connected end to end in the left and right direction, and adjacent left plug-in frames and right plug-in frames are plugged into each other.

[0008] The filter unit includes a mesh plate, which is positioned above and below the filter paper and is connected and fixed to the insertion frame. Sealing caps are provided at both the front and rear ends of the filter unit.

[0009] The primary filtration device is a filter screen.

[0010] The present invention has the following technical effects: The present invention has a reasonable structural design. When a partial filter unit needs to be replaced, it can be directly pulled out for replacement. When overall maintenance is required, the entire detachable filter device can be removed by snap-fit ​​to maintain and replace the parts. Return air can be adjusted according to the required return air ratio. The operation is convenient and the maintenance time is short. Attached Figure Description

[0011] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: In the diagram: 1. Main body; 1.1. Slot; 1.2. Workbench; 1.3. Ventilation hole; 2. Air inlet cavity; 2.1. Front panel; 2.2. Hook; 2.3. Hook seat; 3. Air inlet; 4. Fan; 5. Primary filter device; 6. Detachable filter device; 6.1. Outer frame; 6.2. Filter unit; 6.3. Filter paper; 6.4. Insert frame; 6.5. Left insert frame; 6.6. Right insert frame; 6.7. Mesh plate; 6.8. Sealing cover; 7. Rotating plate; 7.1. Rotating shaft; 7.2. Handle; 7.3. Plate; 8. Return air cavity; 9. Pipe; 9.1. Air volume control panel.

[0012] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a frontal full sectional view of the present invention; Figure 3 This is an enlarged view of part A; Figure 4 This is a side sectional view of the present invention; Figure 5 This is an enlarged view of part B; Figure 6 This is a 3D schematic diagram of a detachable filter device. Detailed Implementation

[0013] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0014] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is merely one example of a series of equivalent or similar features.

[0015] like Figures 1-5The clean bench shown includes a body 1, an air inlet chamber 2 at the top of the body 1, several air inlets 3 at the top of the air inlet chamber 2, a fan 4 at a corresponding position below the air inlets 3, a primary filter 5 at the top of the air inlets 3, and several detachable filter devices 6 at the bottom of the air inlet chamber 2. Each detachable filter device 6 has a slot 1.1 on both sides, which is fixed to the body 1. A rotating locking plate 7 is provided at the end of the slot 1.1 to hold the detachable filter device 6. Each detachable filter device 6 includes an outer frame 6.1, and the outer frame 6.1 contains... Several filter units 6.2 are horizontally arranged. Each filter unit 6.2 includes filter paper 6.3 and a connecting frame 6.4. The filter paper 6.3 is located in the middle of the connecting frame 6.4. A workbench 1.2 is provided on the main body 1. A return air chamber 8 is provided below the workbench 1.2. Ventilation holes 1.3 are provided at both the front and rear ends of the workbench 1.2. The ventilation holes 1.3 are connected to the return air chamber 8. The return air chamber 8 is connected to the air inlet 3 through a pipe 9. An air volume control board 9.1 is provided on the pipe 9. The air volume control board 9.1 is controlled by a servo motor. The opening of the air volume control board 9.1 is controlled to control the return air volume.

[0016] like Figure 4 and Figure 5 As shown, the air inlet cavity 2 includes a front panel 2.1, which is detachable. A hook 2.2 is provided on the front panel, and a hook seat 2.3 is provided on the main body 1 at the position corresponding to the hook 2.2. The hook 2.2 has several more rows downward than the hook seat 2.3. When replacing the filter device 6, the bottom hooks can be hung on the hook seat 2.3, leaving an opening and replacement space, without having to remove the front panel 2.1, making the operation more convenient.

[0017] A filter screen is installed at the outlet of the return air chamber 8.

[0018] like Figure 6 As shown, the rotating plate 7 includes a rotating shaft 7.1, a handle 7.2, and a plate 7.3. The handle 7.2 and the plate 7.3 are respectively disposed on both sides of the rotating shaft 7.1. Rotating the handle 7.2 causes the plate 7.3 to lock or release the detachable filter device 6.

[0019] The plug-in frame 6.4 includes a left plug-in frame 6.5 and a right plug-in frame 6.6. The plug of the left plug-in frame 6.5 faces upward and the plug of the right plug-in frame 6.6 faces downward. The filter unit 6.2 is connected end to end in the left and right direction. The adjacent left plug-in frames 6.5 and right plug-in frames 6.6 are plugged into each other. The plug-in structure allows the filter unit 6.2 to be easily pulled out in a drawer-like manner.

[0020] The filter unit 6.2 includes a mesh plate 6.7, which is positioned above and below the filter paper 6.3 and is connected and fixed to the insertion frame 6.4. Sealing caps 6.8 are provided at both ends of the filter unit 6.2, which seal the ends of the filter unit 6.2 to prevent the filtered gas from escaping.

[0021] The primary filtration device 5 is a filter screen.

[0022] The main body is equipped with a windshield, which is positioned above the workbench surface.

[0023] During operation, clean benches that have been used for a long time need to be replaced because the filter cartridges have weakened filtration function. Lift the front panel 2.1 upwards, hook the bottom hook 2.2 onto the hook seat 2.3 to expose the removable filter device 6, remove the end sealing cover 6.8, pull out the filter unit 6.2, and replace it with a new filter unit 6.2. The filter unit 6.2 can be replaced separately, which can achieve the purpose of minor maintenance. The reverse process can restore the installation and the machine can be used again. The old filter unit can be reused after replacing the filter paper 6.3. When the detachable filter device 6 requires overall maintenance or pipeline inspection and cleaning, the detachable filter device 6 can be quickly removed as a whole. Lift the front panel 2.1 upwards to disengage the hook 2.2 and remove it. Rotate the rotating plate 7 to release the detachable filter device 6. The entire detachable filter device 6 can be pulled out from the slot 1.1 for external maintenance and inspection. Staff can clean and maintain the internal fan 4 and primary filter device 5 through the opening of the front door panel 2.1. The reverse process can restore the installation. This invention reuses gas through the return air chamber 8, and adjusts the amount of gas reused by the air volume control board 9.1. Since the reused gas is the gas that has been filtered before, there will be less dust than fresh air, which extends the service life of the filter unit. When the concentration of medicine in the return air is high, or the concentration of flue gas is high, fresh air can be introduced for use, and the adjustment is convenient.

[0024] This utility model has a reasonable structural design. When a partial filter unit needs to be replaced, it can be directly pulled out for replacement. When overall maintenance is required, the entire detachable filter device can be removed by snap-fit ​​to maintain and replace the parts. Return air can be adjusted according to the required return air ratio. It is easy to operate and has a short maintenance time.

[0025] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A clean workbench with a quick-change filter element, comprising a body (1), characterized in that, The main body (1) has an air inlet cavity (2) at the top, and the air inlet cavity (2) has several air inlets (3) at the top. A fan (4) is provided at the corresponding position below the air inlets (3). A primary filter device (5) is provided at the top of the air inlets (3). Several detachable filter devices (6) are provided at the bottom of the air inlet cavity (2). The detachable filter devices (6) have slots (1.1) on both sides. The slots (1.1) are fixed to the main body (1). A rotating plate (7) for locking the detachable filter device (6) is provided at the end of the slots (1.1). The detachable filter device (6) includes an outer frame (6.1). Several filter units (6.2) are horizontally arranged inside the frame (6.1). The filter unit (6.2) includes filter paper (6.3) and a plug frame (6.4). The filter paper (6.3) is arranged in the middle of the plug frame (6.4). A workbench (1.2) is provided on the main body (1). A return air cavity (8) is provided below the workbench (1.2). Ventilation holes (1.3) are provided at the front and rear ends of the workbench (1.2). The ventilation holes (1.3) are connected to the return air cavity (8). The return air cavity (8) is connected to the air inlet (3) through a pipe (9). An air volume control plate (9.1) is provided on the pipe (9).

2. The clean workbench with a quickly replaceable filter element according to claim 1, characterized in that, The air inlet cavity (2) includes a front panel (2.1), which is detachable. A hook (2.2) is provided on the front panel, and a hook seat (2.3) is provided on the main body (1) at the position corresponding to the hook (2.2).

3. A clean workbench with a quickly replaceable filter element according to claim 1, characterized in that, A filter screen is installed at the outlet of the return air chamber (8).

4. A clean workbench with a quickly replaceable filter element according to claim 1, characterized in that, The rotating plate (7) includes a rotating shaft (7.1), a handle (7.2) and a plate (7.3), with the handle (7.2) and the plate (7.3) respectively located on both sides of the rotating shaft (7.1).

5. A clean workbench with a quickly replaceable filter element according to claim 1, characterized in that, The plug-in frame (6.4) includes a left plug-in frame (6.5) and a right plug-in frame (6.6). The plug-in of the left plug-in frame (6.5) faces upward, and the plug-in of the right plug-in frame (6.6) faces downward. The filter unit (6.2) is connected end to end in the left and right directions. The adjacent left plug-in frames (6.5) and right plug-in frames (6.6) are plugged into each other.

6. A clean workbench with a quickly replaceable filter element according to claim 1, characterized in that, The filter unit (6.2) includes a mesh plate (6.7), which is positioned above and below the filter paper (6.3) and is connected and fixed to the insertion frame (6.4). The filter unit (6.2) is provided with sealing caps (6.8) at both ends.

7. A clean workbench with a quickly replaceable filter element according to claim 1, characterized in that, The primary filtration device (5) is a filter screen.

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