A biosafety cabinet with a multi-head suction device

Abstract

This application relates to the field of experimental equipment, specifically disclosing a biosafety cabinet with a multi-head aspirator. The cabinet includes a cabinet body, a multi-head aspirator, a fixing mechanism, and an air circulation system. A workbench is installed inside the cabinet. The multi-head aspirator includes a suction mechanism, a negative pressure mechanism, and a pressure-distributing mechanism. The suction mechanism, located inside the cabinet, includes multiple suction pens. The negative pressure mechanism, located outside the cabinet, includes a vacuum pump. The pressure-distributing mechanism includes a pressure-distributing cylinder connected between the vacuum pump and the multiple suction pens, used to evenly distribute negative pressure to each suction pen. The fixing mechanism is used to detachably fix the suction pens to the inner wall of the cabinet body. The air circulation system is used to circulate air inside and outside the cabinet. The multi-head aspirator provided in this application, through the coordinated operation of multiple suction ports, can meet the needs of rapid aspiration over large areas, thus helping to improve experimental efficiency.

Description

Technical Field

[0001] This application relates to the field of laboratory equipment, and in particular to a biosafety cabinet with a multi-head suction device. Background Technology

[0002] A biosafety cabinet is a crucial box-type air-purifying negative pressure safety device. Its core function is to prevent the generation of aerosols from hazardous or unknown biological particles during experiments, which could then escape into the external environment or the operator's area. As a fundamental safety device in the laboratory biosafety barrier, biosafety cabinets play a vital role in scientific research and clinical testing in fields such as biology and medicine.

[0003] In the daily use of biosafety cabinets, the aspirator is an important built-in functional component used to aspirate waste liquids in cell experiments. Most of the aspirators configured in existing biosafety cabinets are single-head designs, that is, they have only one suction port. Due to the limited number of suction ports, such single-head aspirators have the following shortcomings: (1) The effective suction coverage area of ​​a single suction port is limited, making it difficult to meet the needs of rapid suction over a large area; (2) When using a single suction port to aspirate different types of waste liquids, it is necessary to frequently change the pipette head to avoid cross-contamination, which affects experimental efficiency. Utility Model Content

[0004] To address the shortcomings of single-head suction devices in biosafety cabinets, this application provides a biosafety cabinet with multi-head suction devices.

[0005] The biosafety cabinet with a multi-head suction device provided in this application adopts the following technical solution:

[0006] A biosafety cabinet with a multi-head suction device includes:

[0007] The cabinet contains a workbench;

[0008] A multi-head suction device includes a suction mechanism, a negative pressure mechanism, and a pressure-distributing mechanism. The suction mechanism is located inside the cabinet and includes multiple suction pens. The negative pressure mechanism is located outside the cabinet and includes a vacuum pump. The pressure-distributing mechanism includes a pressure-distributing cylinder connected between the vacuum pump and the multiple suction pens, and the pressure-distributing cylinder is used to evenly distribute negative pressure to each suction pen.

[0009] A fixing mechanism is provided for detachably fixing the attracting pen to the inner wall of the cabinet.

[0010] An air circulation system is used to circulate air inside and outside the cabinet.

[0011] Furthermore, a telescopic hose is connected between the suction pen and the pressure-distributing cylinder.

[0012] Furthermore, a negative pressure pipe is connected between the vacuum pump and the pressure dividing cylinder.

[0013] Furthermore, the number of the attracting pens is no less than three.

[0014] The negative pressure generated by the vacuum pump is evenly distributed to each suction pen through the pressure dividing cylinder. On the one hand, this improves the applicability of the suction device, not only meeting the needs of conventional single-point small-area suction, but also allowing for parallel suction operations at multiple points when large-area rapid suction is required, thus shortening the waste liquid aspiration time. On the other hand, multiple suction pens and independent flow channels enable "one pen for one use". When aspirating different types of waste liquid in the same experiment, there is no need to frequently change the pipette tip, which helps to improve experimental efficiency.

[0015] Furthermore, the fixing mechanism includes multiple locking blocks fixedly disposed on the inner side wall of the cabinet, each locking block having a slot for accommodating the suction pen.

[0016] Furthermore, the number of the card blocks is the same as the number of the attraction pens.

[0017] Furthermore, the slot is an arc-shaped slot, and its inner circumferential contour is adapted to the outer circumferential contour of the suction pen.

[0018] Multiple suction pens can be fixed in the slots of the card block one by one, thereby avoiding contact between the suction head and the inner wall of the workbench or cabinet, reducing the risk of suction head contamination.

[0019] Furthermore, an elastic anti-slip pad is fixedly provided on the inner circumference of the slot.

[0020] The elastic anti-slip pad increases the friction between the card slot and the suction pen, allowing the suction pen to be stably fixed on the card block.

[0021] Furthermore, the opening of the card slot faces the operator.

[0022] Furthermore, the multiple card blocks are distributed at intervals along the vertical direction.

[0023] This makes it easy for the operator to pick up and place the attraction pen.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The multi-head aspirator provided in this application expands the aspiration area to more than three times that of a single-head design by working in concert with multiple suction ports, supports parallel aspiration operations at multiple points, shortens waste liquid aspiration time, and can meet the needs of rapid aspiration over a large area.

[0026] 2. Multiple suction pens with independent flow channels enable "single pen for single use". When aspirating different types of waste liquid in the same experiment, there is no need to frequently change the pipette tip. This not only avoids cross-contamination but also helps to improve experimental efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the rear view of an embodiment of this application;

[0029] Figure 3 This is a schematic diagram used in this application embodiment to illustrate the attraction mechanism;

[0030] Figure 4 This is a bottom view schematic diagram of an embodiment of this application.

[0031] Reference numerals: 1. Cabinet; 2. Workbench; 3. Sample inlet box; 4. Sample box; 5. Handle; 6. Baffle; 7. Sealing plate; 8. Filter; 9. Suction fan; 10. Suction port; 11. Air outlet; 12. Vent; 13. Fixing plate; 14. Exhaust fan; 15. Exhaust duct; 16. Support plate; 17. Vacuum pump; 18. Negative pressure pipe; 19. Pressure dividing cylinder; 20. Telescopic flexible hose; 21. Suction pen; 22. Suction head; 23. Locking block. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] This application discloses a biosafety cabinet with a multi-head suction device. (See also...) Figure 1 A biosafety cabinet with a multi-head suction device includes a cabinet body 1, a multi-head suction device, a fixation mechanism, and an air circulation system.

[0034] Reference Figure 1 The cabinet body 1 and the air circulation system are essential components of a biosafety cabinet. Cabinet body 1 contains a workbench 2, which serves as the operator's work surface for experimental procedures; the air circulation system circulates air inside and outside cabinet body 1. Cabinet body 1 typically has a sliding glass front window on the side closest to the operator. Figure 1 Not shown in the image.

[0035] Reference Figure 2 and Figure 3The multi-head suction device includes a suction mechanism, a negative pressure mechanism, and a pressure-distributing mechanism. The suction mechanism, located inside the cabinet 1, includes at least three suction pens 21, each with a suction head 22 attached to its tip. The negative pressure mechanism includes a vacuum pump 17, which is fixed to a support plate 16 outside the cabinet 1. The pressure-distributing mechanism includes a pressure-distributing cylinder 19 connected between the vacuum pump 17 and the multiple suction pens 21, used to evenly distribute negative pressure to each suction pen 21.

[0036] Reference Figure 2 and Figure 3 The pressure-distributing cylinder 19 is a cylindrical, sealed cavity with a smooth interior and no obstructing components. The pressure-distributing cylinder 19 is installed through the side wall of the cabinet 1. One end of the pressure-distributing cylinder 19 inside the cabinet 1 is connected to the suction pen 21 via multiple spiral-shaped telescopic hoses 20, which are evenly distributed along the circumference of the pressure-distributing cylinder 19. The other end of the pressure-distributing cylinder 19 outside the cabinet 1 is connected to the vacuum pump 17 via a negative pressure pipe 18, located at the center of one end of the pressure-distributing cylinder 19. The ratio of the internal cross-sectional area of ​​the pressure-distributing cylinder 19 to the internal cross-sectional area of ​​the negative pressure pipe 18 is 3:1 to 5:1 to ensure efficient negative pressure transmission. A waste liquid collection container (not shown in the figure) can be connected between the vacuum pump 17 and the negative pressure pipe 18 for collecting waste liquid.

[0037] The negative pressure generated by the vacuum pump 17 is evenly distributed to each suction pen 21 through the pressure dividing cylinder 19 for aspirating waste liquid in cell experiments. This not only meets the needs of routine single-point small-area aspiration, but also allows for multi-point parallel aspiration operations when large-area rapid aspiration is required, which can shorten the waste liquid aspiration time. On the other hand, multiple suction pens 21 and independent flow channels can achieve "one pen for one use". When aspirating different types of waste liquid in the same experiment, there is no need to frequently change the pipette tip 22, which helps to improve experimental efficiency.

[0038] The fixing mechanism is used to detachably fix the suction pen 21 to the inner wall of the cabinet 1, preventing the suction head 22 from contacting the workbench 2 or the inner wall of the cabinet 1, thus reducing the risk of contamination of the suction head 22. (Refer to...) Figure 3 The fixing mechanism includes multiple locking blocks 23 fixedly installed on the inner side wall of the cabinet 1. The number of locking blocks 23 is the same as the number of suction pens 21, and the multiple locking blocks 23 are distributed at intervals along the vertical direction. Each locking block 23 has a slot for receiving the suction pen 21. The slot is an arc-shaped slot, and its inner circumference is adapted to the outer circumference of the suction pen 21. Multiple suction pens 21 can be fixed in their respective slots.

[0039] To ensure stable placement of the suction pen 21, an elastic anti-slip pad is fixedly installed on the inner circumference of the slot. A rubber pad or a silicone pad can be used to increase the friction between the slot and the suction pen 21.

[0040] To facilitate the operator's handling and placement of the suction pen 21, the opening of the slot faces the operator.

[0041] Reference Figure 1 and Figure 4 The air circulation system includes an air inlet and an air outlet located at the top of the cabinet 1. The air inlet is equipped with a suction fan 9 to draw air from outside the cabinet 1 into the cabinet 1, and the air outlet is equipped with an exhaust fan 14 to exhaust air from inside the cabinet 1 to outside the cabinet 1.

[0042] Furthermore, refer to Figure 1 and Figure 4 A filter 8 is installed between the exhaust fan 9 and the cabinet 1 to filter the air entering the cabinet 1 and prevent external pollutants from entering the cabinet 1; a sealing plate 7 is installed between the filter 8 and the top wall of the cabinet 1. The air outlet end of the filter 8 (located at one end inside the cabinet 1) is provided with an air outlet 11, which includes multiple arrayed circular air holes 12.

[0043] Reference Figure 1 and Figure 4 A fixing plate 13 is installed between the exhaust fan 14 and the top wall of the cabinet 1. A filter 8 can also be installed between the exhaust fan 14 and the cabinet 1 to filter the air discharged from the cabinet 1 and prevent harmful substances inside the cabinet 1 from being released into the outside environment. An exhaust duct 15 is installed at the air inlet end of the exhaust fan 14 (located at one end inside the cabinet 1).

[0044] By cooperating with the suction fan 9 and the exhaust fan 14, air can be circulated inside and outside the cabinet 1.

[0045] Furthermore, a sample channel is provided on one side wall of cabinet 1 to facilitate the transfer of samples inside and outside cabinet 1. For details, please refer to... Figure 1 and Figure 2 The sample channel includes a sample inlet box 3 that runs through one side wall of the cabinet 1. The sample inlet box 3 has openings on both its inner and outer sides. A sample box 4 is slidably disposed within the sample inlet box 3, and a handle 5 is fixedly connected to the side of the sample box 4 inside the cabinet 1. A baffle 6 is installed on the side of the sample inlet box 3 outside the cabinet 1 to isolate the environment inside and outside the cabinet 1. In one embodiment, the baffle 6 can be hinged to the sample inlet box 3, and the free end of the baffle 6 is fixed to the sample inlet box 3 by a snap-fit; in another embodiment, the baffle 6 can be detachably installed to the sample inlet box 3 by magnetic attraction. A sealing structure such as a sealing ring can be provided at the connection between the baffle 6 and the sample inlet box 3.

[0046] The sample is placed in the sample box 4, and then the sample box 4 is slid in the sample injection box 3, which can transfer the sample inside the cabinet 1 to the outside of the cabinet 1, or transfer the sample outside the cabinet 1 to the inside of the cabinet 1.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A biological safety cabinet having a multi-head aspirator, characterized by: include: The cabinet contains a workbench; A multi-head suction device includes a suction mechanism, a negative pressure mechanism, and a pressure-distributing mechanism. The suction mechanism is located inside the cabinet and includes multiple suction pens. The negative pressure mechanism is located outside the cabinet and includes a vacuum pump. The pressure-distributing mechanism includes a pressure-distributing cylinder connected between the vacuum pump and the multiple suction pens, and the pressure-distributing cylinder is used to evenly distribute negative pressure to each suction pen. A fixing mechanism is provided for detachably fixing the attracting pen to the inner wall of the cabinet. An air circulation system is used to circulate air inside and outside the cabinet.

2. The biological safety cabinet with multi-head suction device according to claim 1, wherein: A telescopic hose connects the suction pen to the pressure-distributing cylinder.

3. The biological safety cabinet having a multi-head suction device according to claim 1, wherein: A negative pressure pipe is connected between the vacuum pump and the pressure dividing cylinder.

4. The biological safety cabinet having a multi-head suction device according to claim 1, wherein: The number of attraction pens shall not be less than three.

5. The biological safety cabinet having a multi-head suction device according to claim 1, wherein: The fixing mechanism includes multiple locking blocks fixedly disposed on the inner side wall of the cabinet, and each locking block has a slot for accommodating the suction pen.

6. The biological safety cabinet having a multi-head suction device according to claim 5, wherein: The number of the card blocks is the same as the number of the attraction pens.

7. The biological safety cabinet having a multi-head suction device according to claim 5, wherein: The slot is an arc-shaped slot, and its inner circumference is adapted to the outer circumference of the suction pen.

8. The biological safety cabinet having a multi-head aspirator according to claim 7, wherein: An elastic anti-slip pad is fixedly provided on the inner circumference of the slot.

9. A biosafety cabinet with a multi-head suction device according to claim 5, characterized in that: The opening of the card slot faces the operator.

10. The biological safety cabinet having a multi-head aspirator of claim 7, wherein: The multiple card blocks are distributed at intervals along the vertical direction.

Images