Heavy load type modularized negative pressure workstation

Abstract

The invention discloses a heavy load type modular negative pressure workstation. According to the technical scheme, a bearing module and an airflow regulation and control module are arranged on a rack, the bearing module comprises a physicochemical plate working table top used for bearing a pipetting workstation and a table top supporting frame arranged below the physicochemical plate working table top, and the table top supporting frame comprises structural reinforcing ribs; the table top supporting frame is fixedly arranged on the rack; the airflow regulation and control module comprises an outer shell arranged on the bearing module in a covering mode, an inner cavity and a negative pressure cavity are formed in the outer shell, the negative pressure cavity comprises a bottom rectangular supporting frame, and a left upper L-shaped cover plate and a right upper L-shaped cover plate are symmetrically arranged on one pair of edges of the bottom rectangular supporting frame. And a left lower L-shaped bracket and a right lower L-shaped bracket are symmetrically arranged on the pair of sides. According to the scheme, the bearing capacity is high, and the transportation and installation convenience is improved.

Description

Technical Field

[0001] This invention relates to the field of negative pressure equipment technology, and in particular to a heavy-duty modular negative pressure workstation. Background Technology

[0002] In fields such as biopharmaceuticals, clinical testing, and life science experiments, large-scale pipetting workstations are widely used for precision operations such as batch sample processing and reagent transfer. During these operations, aerosols containing pathogenic microorganisms and harmful particles are easily generated. If these aerosols diffuse into the outside world, they can endanger the health of operators and contaminate the experimental environment. Therefore, it is necessary to use negative pressure equipment to create a safe operating space. Currently available conventional negative pressure workstations have several shortcomings: firstly, their worktables generally have low load-bearing capacity, making them unsuitable for heavy-duty pipetting workstations; secondly, existing negative pressure equipment is generally quite tall, making transportation and on-site installation inconvenient. Therefore, there is an urgent need to develop a heavy-duty modular negative pressure workstation that is highly adaptable, reliably protected, and capable of modular assembly. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the main objective of this invention is to provide a heavy-duty modular negative pressure workstation with strong load-bearing capacity and improved convenience of transportation and installation.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a heavy-duty modular negative pressure workstation, comprising a frame, on which a load-bearing module and an airflow control module are mounted. The load-bearing module includes a phenolic resin plate workbench for supporting the pipetting workstation and a workbench support frame disposed below the workbench. The workbench support frame includes structural reinforcing ribs and is fixedly mounted on the frame. The airflow control module includes an outer shell covering the load-bearing module. The outer shell contains an inner cavity and a negative pressure chamber. The load-bearing module is disposed in the inner cavity. Two brushless DC downdraft fans are disposed at the top of the inner cavity, blowing downdraft airflow towards the pipetting workstation below. Two brushless DC exhaust fans are disposed between the outer shell and the inner cavity, drawing gas out of the equipment through ventilation holes at the bottom of the inner cavity, creating a negative pressure in the inner cavity. The downdraft airflow carries away gas generated in the operating area of ​​the inner cavity. After the aerosol and harmful particles are removed, they are simultaneously extracted and discharged from the equipment by two DC brushless exhaust fans. The negative pressure chamber includes a bottom rectangular support frame. A left upper L-shaped cover plate and a right upper L-shaped cover plate are symmetrically arranged on a pair of sides of the bottom rectangular support frame. A left lower L-shaped bracket and a right lower L-shaped bracket are also symmetrically arranged on the same pair of sides. Two front panels and two rear panels are respectively arranged on the other pair of sides of the bottom rectangular support frame. Support columns connected to the bottom rectangular support frame by bolts are respectively arranged between the two front panels and the two rear panels. The left upper L-shaped cover plate and the right upper L-shaped cover plate are respectively bolted to the support columns to form the top cover and half of the side wall of the negative pressure chamber. The left lower L-shaped bracket and the right lower L-shaped bracket are respectively bolted to the bottom rectangular support frame and then connected to the left upper L-shaped cover plate and the right upper L-shaped cover plate to form a pair of side walls of the negative pressure chamber. The two front panels and the two rear panels are respectively fixedly connected to the support columns and side walls by compression door locks.

[0005] Preferably, the outer casing is provided with transparent PC panels on both sides and the front portion, which can block 254nm ultraviolet rays.

[0006] Preferably, the upper left L-shaped cover plate and the lower left L-shaped bracket are respectively provided with connecting plates with bolt holes, and the upper left L-shaped cover plate and the lower left L-shaped bracket are fastened together by bolts; the upper right L-shaped cover plate and the lower right L-shaped bracket are respectively provided with connecting plates with bolt holes, and the upper right L-shaped cover plate and the lower right L-shaped bracket are fastened together by bolts.

[0007] Preferably, a mesh-like airflow diffuser is installed below each of the two DC brushless sinking fans.

[0008] Compared with existing technologies, this invention has the following advantages: It employs a dual-fan redundant design, with two units each for the sinking fan and the exhaust fan. If one fan fails, the other can independently maintain negative pressure protection, significantly improving reliability and avoiding the risk of single-point failure. The scientifically designed airflow organization ensures that the sinking fan stably maintains vertical airflow velocity for efficient aerosol capture, while the exhaust fan powerfully extracts air to ensure that the negative pressure value and inflow airflow velocity meet standards, providing double protection against contaminant leakage. The structural reinforcement of the tabletop support frame significantly enhances load-bearing capacity, making it compatible with various heavy-duty pipetting workstations and expanding its application range. The outer casing uses transparent PC boards that block 254nm ultraviolet rays on both sides and the front, allowing visual monitoring while shielding radiation and protecting the health of operators. A mesh airflow diffuser is added below the sinking fan to make airflow distribution more uniform, avoiding turbulence or dead zones and improving contaminant entrainment efficiency. A hazardous waste bin is recessed at one end of the phenolic resin worktable for easy disposal of experimental waste, reducing open operations and lowering the risk of cross-contamination. Overall, this equipment integrates high reliability, efficient protection, strong adaptability, and ease of operation, providing excellent safety assurance for pipetting workstations. Its modular design significantly improves the convenience of transportation and installation; components can be disassembled and packaged separately, reducing space occupation and adapting to narrow passages or standard freight requirements, thus lowering handling costs and risks. On-site assembly is flexible and efficient, using mechanical connections such as bolts, eliminating the need for professional welding or complex processes, shortening the installation cycle, and allowing adjustments based on actual space conditions. Structural maintenance and replacement are simple; individual modules (such as the front panel and L-shaped cover) can be independently disassembled, facilitating cleaning, maintenance, or partial upgrades, extending the overall service life. It features excellent sealing and stability; compression door locks ensure a tight fit between the panel and frame, while support columns and connecting plates strengthen the overall structural integrity, ensuring airtightness and operational safety in negative pressure environments. This design balances functionality and economy, meeting the aerosol containment requirements of biopharmaceuticals, testing, and other fields while reducing production costs and inventory pressure through standardized modules, making it highly marketable and worthy of promotion. Attached Figure Description

[0009] Figure 1 This is a structural schematic diagram of a heavy-duty modular negative pressure workstation according to the present invention; Figure 2 This is a partial exploded view of a heavy-duty modular negative pressure workstation according to the present invention. Figure 1 ; Figure 3 This is a partial exploded view of a heavy-duty modular negative pressure workstation according to the present invention. Figure 2 ; Figure 4 This is an exploded view of the negative pressure chamber of the present invention.

[0010] In the diagram: 1. Frame; 2. Chemical-resistant board work surface; 3. Work surface support frame; 4. Structural reinforcing rib; 5. Outer shell; 6. Inner cavity; 7. DC brushless sinking fan; 8. DC brushless exhaust fan; 9. Transparent PC board; 10. Airflow diffuser; 11. Hazardous waste bin; 12. Liquid handling workstation; 13. Negative pressure chamber; 14. Bottom rectangular support frame; 15. Upper left L-shaped cover; 16. Upper right L-shaped cover; 17. Lower left L-shaped bracket; 18. Lower right L-shaped bracket; 19. Front panel; 20. Rear panel; 21. Support column; 22. Compression door lock; 23. Connecting plate. Detailed Implementation

[0011] The invention will now be further described with reference to the accompanying drawings.

[0012] like Figure 1As shown, a heavy-duty modular negative pressure workstation includes a frame 1, on which a support module and an airflow control module are mounted. The support module includes a phenolic resin plate worktable 2 for supporting a pipetting workstation 12 and a worktable support frame 3 disposed below the worktable 2. The worktable support frame 3 includes structural reinforcing ribs 4 and is fixedly mounted on the frame 1. The airflow control module includes an outer shell 5 covering the support module, and the outer shell 5 contains an inner cavity 6 and a negative pressure chamber 13. The supporting module is installed in the inner cavity 6. Two brushless DC sinking fans 7 are installed at the top of the inner cavity 6. The two brushless DC sinking fans 7 blow sinking airflow downwards to the liquid transfer workstation 12. Two brushless DC exhaust fans 8 are installed between the outer shell 5 and the inner cavity 6. The two brushless DC exhaust fans 8 draw the gas out of the equipment from the ventilation holes at the bottom of the inner cavity 6, creating a negative pressure in the inner cavity 6. The sinking airflow carries aerosols and harmful particles generated in the operating area of ​​the inner cavity 6, and is then simultaneously exhausted by the two brushless DC exhaust fans 8. The equipment is extracted and discharged; the negative pressure chamber 13 includes a bottom rectangular support frame 14, on which a left upper L-shaped cover plate 15 and a right upper L-shaped cover plate 16 are symmetrically arranged on one pair of sides, and a left lower L-shaped bracket 17 and a right lower L-shaped bracket 18 are also symmetrically arranged on the same pair of sides; two front panels 19 and two rear panels 20 are respectively arranged on the other pair of sides of the bottom rectangular support frame 14, and the two front panels 19 and the two rear panels 20 are respectively connected to the bottom rectangular support frame 14 by bolts. The supporting column 21; the upper left L-shaped cover plate 15 and the upper right L-shaped cover plate 16 are respectively bolted to the supporting column 21 to form the top cover and half of the side wall of the negative pressure chamber 13; the lower left L-shaped bracket 17 and the lower right L-shaped bracket 18 are respectively bolted to the bottom rectangular support frame 14 and then connected with the upper left L-shaped cover plate 15 and the upper right L-shaped cover plate 16 to form a pair of side walls of the negative pressure chamber 13; the two front panels 19 and the two rear panels 20 are respectively fixedly connected to the supporting column 21 and the side walls by compression door locks 22.

[0013] Preferably, the outer casing 5 is provided with transparent PC boards 9 on both sides and the front part, which can block 254nm ultraviolet rays.

[0014] Preferably, the upper left L-shaped cover plate 15 and the lower left L-shaped bracket 17 are respectively provided with connecting plates 23 with bolt holes, and the upper left L-shaped cover plate 15 and the lower left L-shaped bracket 17 are fastened together by bolts; the upper right L-shaped cover plate 16 and the lower right L-shaped bracket 18 are respectively provided with connecting plates 23 with bolt holes, and the upper right L-shaped cover plate 16 and the lower right L-shaped bracket 18 are fastened together by bolts.

[0015] Preferably, a mesh-like airflow diffuser 10 is provided below each of the two DC brushless sinking fans 7.

[0016] Its technical principle is based on a dual-fan coordinated airflow control mechanism and a reinforced load-bearing structure to create an efficient and stable negative pressure operating environment. The core of the equipment includes a frame 1, a load-bearing module, and an airflow control module: the load-bearing module adopts a high-strength phenolic resin board workbench 2, with a workbench support frame 3 below it. The frame is embedded with structural reinforcing ribs 4, which significantly improves the load-bearing capacity through mechanical reinforcement, ensuring stable support for the heavy-duty liquid handling workstation 12; the airflow control module forms a closed inner cavity 6 by covering the load-bearing module with an outer shell 5. Two DC brushless downward fans 7 are installed side by side on the top of the inner cavity 6 to continuously blow a uniform downward airflow. At the same time, two DC brushless exhaust fans 8 are arranged between the outer shell 5 and the inner cavity 6 to continuously draw air out of the equipment from the ventilation holes at the bottom of the inner cavity 6, thereby establishing a constant negative pressure in the inner cavity 6. During operation, the descending airflow fully covers the operating area, powerfully entraining aerosols containing pathogenic microorganisms or harmful particles generated during liquid handling. This forces contaminants downwards, where they are then simultaneously drawn in and safely discharged by two exhaust fans, forming a closed-loop airflow from top to bottom. This ensures the operating area remains under negative pressure, effectively preventing contaminant leakage. The negative pressure chamber 13 utilizes a modular design that breaks down the traditional monolithic negative pressure chamber 13 into multiple independent components, including a bottom rectangular support frame 141, paired L-shaped covers (upper left and upper right) and L-shaped brackets (lower left and lower right), a front panel 19, a rear panel 20, and support columns 21. The components are primarily connected by bolts and secured with compression locks 22. The L-shaped covers and L-shaped brackets are joined together by connecting plates 23 with bolt holes to form a complete sidewall. The support columns 21 are connected to the bottom support frame by bolts and provide fixed support for the top cover and panels, thus creating a sealed negative pressure operating space after assembly. This structure transforms the dispersed state during transportation into a unified structure during use. Its core lies in reducing the overall size through on-site assembly of prefabricated modules, thus solving the transportation and access problems caused by the high height of traditional negative pressure equipment.

[0017] Advantages include: a dual-fan redundant design with two fans for both the sinking and exhaust fans; in case of failure of either fan, the other can independently maintain negative pressure protection, significantly improving reliability and avoiding single-point failure risks; a scientifically designed airflow organization, with the sinking fan maintaining a stable vertical airflow velocity for efficient aerosol capture, and the exhaust fan providing strong suction to ensure that the negative pressure value and inflow airflow velocity meet standards, providing double protection against contaminant leakage; structural reinforcing ribs 4 of the tabletop support frame 3 significantly enhance load-bearing capacity, making it compatible with various heavy-duty pipetting workstations 12 and expanding its application range; transparent PC boards 9 that block 254nm ultraviolet rays are used on both sides and the front of the outer casing 5, allowing visual monitoring while shielding radiation and protecting the health of operators; a mesh airflow diffuser 10 is added below the sinking fan to make the airflow distribution more uniform, avoiding turbulence or dead zones and improving contaminant entrainment efficiency; a hazardous waste bin 11 is recessed at one end of the phenolic board worktable 2 for easy direct disposal of experimental waste, reducing open operations and lowering the risk of cross-contamination. Overall, this equipment integrates high reliability, efficient protection, strong adaptability, and ease of operation, providing excellent safety for the pipetting workstation 12. Its modular design significantly improves the convenience of transportation and installation; components can be disassembled and packaged separately, reducing space occupation and adapting to narrow passages or standard freight requirements, thus lowering handling costs and risks. On-site assembly is flexible and efficient, using mechanical connections such as bolt locking, eliminating the need for professional welding or complex processes, shortening the installation cycle, and allowing adjustments based on actual space conditions. Structural maintenance and replacement are simple; individual modules (such as the front panel 19 and L-shaped cover) can be independently disassembled, facilitating cleaning, maintenance, or partial upgrades, extending the overall service life. It possesses excellent sealing and stability; the compression door lock 22 ensures a tight fit between the panel and frame, while the supporting columns 21 and connecting plates 23 strengthen the overall structural integrity, ensuring the airtightness of the cavity and operational safety under negative pressure. This design balances functionality and economy, meeting the aerosol containment requirements of biopharmaceutical, testing, and other fields while reducing production costs and inventory pressure through standardized modules, making it highly marketable and worthy of promotion.

[0018] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A heavy-duty modular negative pressure workstation, characterized in that: The system includes a frame, on which a support module and an airflow control module are mounted. The support module includes a phenolic resin workbench for supporting the pipetting workstation and a workbench support frame located below the workbench. The workbench support frame includes structural reinforcing ribs and is fixedly mounted on the frame. The airflow control module includes an outer shell covering the support module. The outer shell contains an inner cavity and a negative pressure chamber. The support module is located in the inner cavity. Two brushless DC downdraft fans are located at the top of the inner cavity, blowing downdraft airflow towards the pipetting workstation below. Two brushless DC exhaust fans are located between the outer shell and the inner cavity, drawing gas out of the inner cavity through ventilation holes at the bottom, creating a negative pressure inside the inner cavity. The downdraft airflow, carrying aerosols and harmful particles generated in the inner cavity's operating area, is then exhausted by the two brushless DC exhaust fans. The fan synchronously extracts and discharges the equipment; the negative pressure chamber includes a bottom rectangular support frame, on which a left upper L-shaped cover plate and a right upper L-shaped cover plate are symmetrically arranged on a pair of sides, and a left lower L-shaped bracket and a right lower L-shaped bracket are also symmetrically arranged on the same pair of sides; on the other pair of sides of the bottom rectangular support frame, two front panels and two rear panels are respectively arranged, and a support column connected to the bottom rectangular support frame by bolts is respectively arranged between the two front panels and the two rear panels; the left upper L-shaped cover plate and the right upper L-shaped cover plate are respectively bolted to the support column to form the top cover and half of the side wall of the negative pressure chamber; the left lower L-shaped bracket and the right lower L-shaped bracket are respectively bolted to the bottom rectangular support frame and then connected to the left upper L-shaped cover plate and the right upper L-shaped cover plate to form a pair of side walls of the negative pressure chamber; the two front panels and the two rear panels are respectively fixedly connected to the support column and the side walls by compression door locks.

2. The heavy-duty modular negative pressure workstation according to claim 1, characterized in that: The outer casing is provided with transparent PC panels on both sides and the front, which can block 254nm ultraviolet rays.

3. The heavy-duty modular negative pressure workstation according to claim 1, characterized in that: The upper left L-shaped cover plate and the lower left L-shaped bracket are respectively provided with connecting plates with bolt holes, and the upper left L-shaped cover plate and the lower left L-shaped bracket are fastened together by bolts; the upper right L-shaped cover plate and the lower right L-shaped bracket are respectively provided with connecting plates with bolt holes, and the upper right L-shaped cover plate and the lower right L-shaped bracket are fastened together by bolts.

4. The heavy-duty modular negative pressure workstation according to claim 1, characterized in that: Both of the DC brushless sinking fans are equipped with mesh airflow diffusers below them.

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