A biosafety cabinet with ultraviolet disinfection lamp

Abstract

This invention discloses a biosafety cabinet with an ultraviolet (UV) disinfection lamp, comprising a cabinet body and an air filtration device disposed above the cabinet body. Below the air filtration device is a working area. A sliding window is provided on the front side of the cabinet body. The key feature is that an UV lamp device is provided within the working area. The UV lamp device includes a flip-up plate, a traction mechanism, and a mounting compartment. A partition chamber is provided between the inner side panel of the working area and the back panel of the cabinet body. The mounting compartment is located within the partition chamber, with one end hinged to the inner side panel via the flip-up plate, and the other end connected to the sliding window via the traction mechanism. The UV lamp is disposed within the mounting compartment and gains the freedom to rotate from the partition chamber to the working area through the rotation of the flip-up plate. In this invention, the UV lamp switches between the partition chamber and the working area via the mounting compartment, avoiding interference with airflow and improving the safety of UV disinfection.

Description

Technical Field

[0001] This invention relates to a biosafety cabinet, and more particularly to a biosafety cabinet equipped with an ultraviolet disinfection lamp. Background Technology

[0002] Biosafety cabinets are devices used in biosafety laboratories and other laboratories for biosafety protection and isolation. They are classified into Class I and Class II biosafety cabinets according to their safety performance and purpose. To ensure operator safety and prevent accidental injury, operators can operate within the biosafety cabinet through the front operating window. The negative pressure airflow drawn in through the front operating window protects the operator; the descending airflow filtered by a high-efficiency filter protects the experimental materials inside the biosafety cabinet; and the airflow, after being filtered again by a high-efficiency filter, is discharged from the biosafety cabinet to protect the environment.

[0003] The operating area of ​​a biosafety cabinet requires regular cleaning, and ultraviolet (UV) light disinfection is a common method. In existing technology, the UV disinfection lamp 30 is typically mounted on the back panel 31 (e.g., Figure 1 For example, the Chinese utility model patent "A Biosafety Cabinet" (CN 205109658 U) controls the opening and closing of the ultraviolet disinfection lamp via a control panel on the front window. However, this type of external ultraviolet disinfection lamp has the following problems:

[0004] 1. Airflow interference problem:

[0005] The external UV lamp protrudes from the back panel, blocking the vertical unidirectional flow (ISO) generated by the HEPA filter.

[0006] The 5-level clean airflow creates a vortex in the space below the UV disinfection lamp, affecting the overall laminar flow pattern of the work area and increasing the risk of pollutant retention.

[0007] 2. Cleanliness obstacles:

[0008] The protruding structure creates cleaning dead zones on the inner wall of the cabinet, making it difficult to completely remove biological contaminants.

[0009] 3. Easily damaged:

[0010] During internal cleaning, the ultraviolet disinfection lamps are frequently encountered, which can damage the lamp tubes in severe cases. Summary of the Invention

[0011] The purpose of this invention is to provide a biosafety cabinet with an ultraviolet disinfection lamp. Through structural improvements, the problem of exposed ultraviolet disinfection lamps is solved, making it safer to use and not affecting the airflow direction, thus improving equipment performance.

[0012] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a biosafety cabinet with an ultraviolet disinfection lamp, comprising a cabinet body and an air filtration device disposed above the cabinet body. The area below the air filtration device is a working area, and clean airflow passes through the working area to the operating platform below. An operating window is provided on the front side of the cabinet body, and a sliding window is provided on the corresponding operating window. An ultraviolet lamp device is provided in the working area. The ultraviolet lamp device includes a flip plate, a traction mechanism, and an installation compartment. An interval chamber is provided between the inner side panel of the working area and the back panel of the cabinet body. The installation compartment is located in the interval chamber, and one end of it is hinged to the inner side panel through the flip plate, and the other end is connected to the sliding window through the traction mechanism. The ultraviolet lamp is disposed in the installation compartment and obtains the degree of freedom of rotation from the interval chamber to the working area by rotating the flip plate.

[0013] The traction mechanism includes a traction rope, a plurality of fixed pulleys and a hook. One end of the traction rope is fixed to the installation compartment, and the other end is fixedly connected to the hook. After changing direction through the fixed pulleys, it extends to the top edge of the sliding window. A hanging hole is opened on the top edge of the sliding window, and the hook is connected to the hanging hole.

[0014] By moving the sliding window up and down, the traction rope is pulled in or out, causing the installation compartment to switch between the partition chamber and the working area.

[0015] In the above technical solution, a disinfection window is provided on the inner side panel, and the ultraviolet lamp irradiates ultraviolet light into the working area through the disinfection window.

[0016] A further technical solution is that a roller shutter is provided at the disinfection window, the roller shutter covers the disinfection window, when the ultraviolet lamp turns to the working area, the roller shutter rolls up to open the disinfection window, when the ultraviolet lamp turns into the partition chamber, the roller shutter pulls down to close the disinfection window, the roller shutter is driven by a roller shutter shaft set above the disinfection window, and the roller shutter shaft is pulled synchronously with the traction rope by a pull rope.

[0017] A further technical solution is that a touch switch is provided on the inner side plate, and the touch switch is connected to the roller shutter shaft. When the installation compartment flips towards the working area, it contacts the touch switch, the roller shutter retracts, and the disinfection window opens. Conversely, when the installation compartment resets and flips towards the partition chamber, the installation compartment moves away from the touch switch, the roller shutter lowers, and the disinfection window is blocked.

[0018] In the above-mentioned technical solution, a safety touch switch is provided below the sliding window. The safety touch switch is electrically connected to the ultraviolet lamp. When the sliding window moves down to close, the safety touch switch contacts the operating platform, and the ultraviolet lamp is turned on. Conversely, when the sliding window moves up to open, the safety touch switch leaves the operating platform, and the ultraviolet lamp is turned off.

[0019] In the above technical solution, the traction mechanism is located on the left and right sides of the installation compartment, respectively in the interlayer space between the inner side panel and the cabinet in the working area. The fixed pulleys are fixed on the corresponding inner side panels, including a first fixed pulley above the corresponding disinfection window and a second fixed pulley above the corresponding sliding window. The traction rope passes through the first fixed pulley, passes above the working area to the second fixed pulley, and is fixed to the hanging hole on the upper edge of the sliding window.

[0020] In the above technical solution, the flip plate includes a first plate fixed on the inner side plate, a second plate fixed on the installation compartment, and a pin connecting the two plates. The second plate has the freedom to rotate about the first plate with the pin as the axis of rotation. The cabinet back plate is provided with a limiting protrusion, and the installation compartment rests on the limiting protrusion when it is located in the partition chamber.

[0021] In the above technical solution, the cabinet side plate of the partition chamber is provided with a traction rope guide plate, and the traction rope guide plate is provided with an oval horizontal guide hole in the middle, through which the traction rope passes.

[0022] In the above technical solution, the installation compartment is Ω-shaped, the ultraviolet lamp is fixed in the groove of the Ω-shape, the lower flange of the Ω-shape is connected to the flip plate, and the upper flange of the Ω-shape is connected to the traction rope.

[0023] A further technical solution is that the cabinet side panel of the partition chamber is provided with an arc-shaped guide plate, and the edge of the upper flange of the installation compartment rotates along the extension trajectory of the arc-shaped guide plate.

[0024] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0025] 1. In this invention, a rigid traction rope is connected to an opening in a sliding window, and the other end of the rigid traction rope is connected to the installation chamber of the ultraviolet disinfection lamp. A fixed pulley is installed inside the cabinet to allow the traction rope to slide. When the sliding window is completely closed, the traction rope pulls the installation chamber from the partition chamber to face the work area, and the ultraviolet lamp is turned on to disinfect the work area with ultraviolet light. Conversely, when the sliding window is opened, the traction rope is released, the installation chamber flips back to its original position, the ultraviolet lamp is turned off and returns to the partition cavity, and the work area can work normally. This achieves the concealment of the ultraviolet lamp, ① during its non-working phase, it does not interfere with the airflow in the work area and does not affect the laminar flow pattern, resulting in better airflow in the work area; ② it also provides protection, preventing injury to personnel from accidental activation of the ultraviolet light; ③ it also makes internal cleaning more convenient, avoiding accidental contact with the ultraviolet lamp and damage to it.

[0026] 2. A roller shutter is installed to cover the disinfection window. The retraction and descent of the roller shutter shaft is controlled by the engagement or disengagement of a touch switch. When the installation compartment flips and engages with the touch switch, the roller shutter shaft starts, retracting the shutter and opening the disinfection window, allowing ultraviolet light to enter the work area. When the installation compartment moves away from the touch switch, the roller shutter shaft rotates in the opposite direction, lowering the shutter and covering the disinfection window, thus protecting the work area. In this way, even if the interlock function between the ultraviolet lamp device and the sliding window malfunctions, it can still protect personnel and improve safety during use.

[0027] 3. Install a safety trigger switch to further link the activation of the ultraviolet lamp with the position of the sliding window. The ultraviolet lamp will not be turned on when the sliding window has not reached the operating platform, thus enhancing the protection of personnel.

[0028] 4. This invention mechanically determines the activation status or irradiation area of ​​the ultraviolet lamp, avoiding full reliance on automated control programs and improving safety during use. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of the background technology of this invention;

[0030] Figure 2 This is a schematic diagram of the structure of the ultraviolet lamp in the off state in one embodiment of the present invention;

[0031] Figure 3 yes Figure 2 A schematic diagram of the structure of a medium ultraviolet lamp in operation;

[0032] Figure 4 This is a partially enlarged schematic diagram of the ultraviolet lamp device in another embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the ultraviolet lamp position switching process in an embodiment of the present invention;

[0034] Figure 6 It is self Figure 5 A schematic diagram of the traction mechanism shown in direction A.

[0035] The components include: 1. Cabinet; 2. Air filtration device; 3. Working area; 4. Operating platform; 5. Operating window; 6. Sliding window; 7. Flip-up panel; 8. Traction mechanism; 9. Installation compartment; 10. Inner side panel; 11. Cabinet back panel; 12. Partitioned chamber; 13. Ultraviolet lamp; 14. Traction rope; 15. Hook; 16. Roller blind; 17. Roller blind shaft; 18. Touch switch; 19. Mezzanine space; 20. First fixed pulley; 21. Second fixed pulley; 22. First plate; 23. Second plate; 24. Pin; 25. Limiting protrusion; 26. Traction rope guide plate; 27. Horizontal guide hole.

[0036] 30. Ultraviolet disinfection lamp; 31. Back panel. Detailed Implementation

[0037] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Furthermore, the terms "vertical," "horizontal," "top," "bottom," "front," "back," "upper," "lower," "inner," and "outer," etc., mentioned in the embodiments of the present invention, indicate orientation or positional relationships based on the appendix. Figure 2 The orientations or positional relationships shown, or the orientations or positional relationships in which the product is usually placed during use, are only for the purpose of facilitating the description of the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. The following will refer to the appendix... Figure 2-6 The present invention will be described in detail with reference to the embodiments.

[0038] One embodiment: See Figures 2-6 As shown, a biosafety cabinet with an ultraviolet disinfection lamp includes a cabinet body 1 and an air filter device 2 disposed above the cabinet body 1. Below the air filter device 2 is a working area 3. Clean airflow passes through the working area 3 to reach the operating platform 4 below. An operating window 5 is provided on the front side of the cabinet body 1, and a sliding window 6 is provided on the corresponding operating window 5. An ultraviolet lamp device is provided in the working area 3. The ultraviolet lamp device includes a flip plate 7, a traction mechanism 8, and an installation compartment 9. An partition chamber 12 is provided between the inner side plate 10 of the working area 3 and the back plate 11 of the cabinet body. The installation compartment 9 is located in the partition chamber 12, and one end of it is hinged to the inner side plate 10 through the flip plate 7, and the other end is connected to the sliding window 6 through the traction mechanism 8. An ultraviolet lamp 13 is disposed in the installation compartment 9 and obtains the degree of freedom to rotate from the partition chamber 12 to the working area 3 by rotating the flip plate 7.

[0039] The traction mechanism 8 includes a traction rope 14, a plurality of fixed pulleys and a hook 15. One end of the traction rope 14 is fixed to the installation chamber 9, and the other end is fixedly connected to the hook 15. After changing direction through the fixed pulleys, it extends to the top edge of the sliding window 6. A hanging hole is opened on the top edge of the sliding window 6, and the hook 15 is connected to the hanging hole.

[0040] By moving the sliding window 6 up and down, the traction rope 14 is pulled in or out, thereby driving the installation compartment 9 to switch between the partition chamber 12 and the working area 3.

[0041] A disinfection window is provided on the inner side panel 10, and the ultraviolet lamp 13 shines ultraviolet light into the working area 3 through the disinfection window.

[0042] To enhance protection, a roller shutter 16 is provided at the disinfection window, which covers the disinfection window. When the ultraviolet lamp 13 is turned to the working area 3, the roller shutter 16 rolls up to open the disinfection window. When the ultraviolet lamp 13 moves into the partition chamber 12, the roller shutter 16 pulls down to close the disinfection window.

[0043] One way to open the roller blind is as follows: the roller blind 16 is driven by the roller blind shaft 17 located above the disinfection window. The roller blind shaft 17 is pulled synchronously by the pull rope and the traction rope 14. When the traction rope 14 is actuated, the roller blind shaft 17 is also pulled, and the roller blind 16 is rolled up synchronously. Conversely, the roller blind 16 is lowered.

[0044] Another method is as follows: A touch switch 18 is provided on the inner side plate 10. The touch switch 18 is connected to the roller shutter shaft 17. When the mounting chamber 9 flips towards the working area 3, it contacts the touch switch 18, causing the roller shutter 16 to retract and the disinfection window to open. Conversely, when the mounting chamber 9 returns to its original position and flips towards the partition chamber 12, the mounting chamber 9 moves away from the touch switch 18, and the roller shutter 16 lowers, blocking the disinfection window. The touch switch 18 can be an electromagnetic switch. When it contacts the mounting chamber 9, it is activated, driving the roller shutter shaft 17 to roll upwards. When the mounting chamber 9 moves away from the touch switch 18, the roller shutter shaft 17 loses its retraction force and lowers under gravity, returning to its initial state.

[0045] The traction mechanism 8 is located on the left and right sides of the installation compartment 9, respectively in the interlayer space 19 between the inner side panel of the working area 3 and the cabinet 1. The fixed pulleys are fixed on the corresponding inner side panels, including a first fixed pulley 20 above the corresponding disinfection window and a second fixed pulley 21 above the corresponding sliding window 6. The traction rope 14 passes through the first fixed pulley 20, passes above the working area 3 to the second fixed pulley 21, and is fixed to the hanging hole on the upper edge of the sliding window 6.

[0046] The flip plate 7 includes a first plate 22 fixed on the inner side plate 10, a second plate 23 fixed on the mounting chamber 9, and a pin 24 connecting the two plates. The second plate 23 has the degree of freedom to rotate about the first plate 22 with the pin 24 as the axis of rotation.

[0047] In another embodiment, to improve stability, a limiting protrusion 25 is provided on the cabinet back panel 11. When the installation compartment 9 is located in the partition chamber 12, it rests on the limiting protrusion 25, reducing the damage caused by prolonged tension on the traction rope 14, hooks, etc. Figure 4 .

[0048] The installation compartment 9 is Ω-shaped, such as Figure 4 , 5 As shown, the ultraviolet lamp 13 is fixed in an Ω-shaped groove, the lower flange of the Ω-shape is connected to the flip plate 7, and the upper flange of the Ω-shape is connected to the traction rope 14. The ultraviolet lamp 13 is placed in the groove to prevent damage.

[0049] The cabinet side panel of the partition chamber 12 is equipped with a traction rope guide plate 26, which is divided into left and right sides, such as... Figure 6 As shown, the traction rope guide plate has an oval horizontal guide hole 27 in the middle. The traction rope 14 passes through the guide hole to limit the left and right direction of the traction rope 14, avoid swaying during pulling, and make the operation more stable.

[0050] In another embodiment: a biosafety cabinet with an ultraviolet disinfection lamp. In this embodiment, most of the structure and working principle are similar to those of the previous embodiments. The difference is that, in order to further improve the safety of use, a safety touch switch is provided below the sliding window 6. The safety touch switch is electrically connected to the ultraviolet lamp 13. When the sliding window 6 moves down to close, the safety touch switch contacts the operating platform 4, and the ultraviolet lamp 13 is turned on; conversely, when the sliding window 6 moves up to open, the safety touch switch leaves the operating platform 4, and the ultraviolet lamp 13 is turned off.

[0051] In addition to using the traction rope guide plate 26 in Embodiment 1, the traction rope 14 can also be guided by the dynamic trajectory of the installation compartment. Specifically, the cabinet side plate of the partition chamber 12 is provided with an arc-shaped guide plate, and the edge of the upper flange of the installation compartment rotates along the extension trajectory of the arc-shaped guide plate. The installation compartment 9 rotates within the range of the arc-shaped guide plate, ensuring smooth rotation and avoiding deviation or jamming of the traction rope 14.

[0052] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A biosafety cabinet with an ultraviolet disinfection lamp, comprising a cabinet body and an air filtration device disposed above the cabinet body, wherein the area below the air filtration device is a working area, and clean airflow passes through the working area to the operating platform below; an operating window is provided on the front side of the cabinet body, and a sliding window is provided corresponding to the operating window; characterized in that: The working area is equipped with an ultraviolet lamp device, which includes a flip plate, a traction mechanism, and an installation compartment. An interval chamber is provided between the inner side panel of the working area and the back panel of the cabinet. The installation compartment is located in the interval chamber, and one end of the compartment is hinged to the inner side panel through the flip plate, while the other end is connected to the sliding window through the traction mechanism. The ultraviolet lamp is placed in the installation compartment and gains the freedom to rotate from the interval chamber to the working area through the rotation of the flip plate. The traction mechanism includes a traction rope, a plurality of fixed pulleys and a hook. One end of the traction rope is fixed to the installation compartment, and the other end is fixedly connected to the hook. After changing direction through the fixed pulleys, it extends to the top edge of the sliding window. A hanging hole is opened on the top edge of the sliding window, and the hook is connected to the hanging hole. By moving the sliding window up and down, the traction rope is pulled in or out, thereby switching the installation compartment between the partition chamber and the working area.

2. The biosafety cabinet with ultraviolet disinfection lamp according to claim 1, characterized in that: A disinfection window is provided on the inner side panel, through which the ultraviolet lamp irradiates ultraviolet light into the working area.

3. The biosafety cabinet with an ultraviolet disinfection lamp according to claim 2, characterized in that: A roller shutter is provided at the disinfection window, which covers the disinfection window. When the ultraviolet lamp is turned to the working area, the roller shutter rolls up to open the disinfection window. When the ultraviolet lamp is turned into the partition chamber, the roller shutter pulls down to close the disinfection window. The roller shutter is driven by a roller shutter shaft set above the disinfection window. The roller shutter shaft is pulled synchronously with the traction rope by a pull rope.

4. The biosafety cabinet with ultraviolet disinfection lamp according to claim 3, characterized in that: A touch switch is provided on the inner side plate. The touch switch is connected to the roller shutter shaft. When the installation compartment flips towards the working area, it contacts the touch switch, the roller shutter retracts, and the disinfection window opens. Conversely, when the installation compartment resets and flips towards the partition chamber, the installation compartment moves away from the touch switch, the roller shutter lowers, and the disinfection window is blocked.

5. The biosafety cabinet with an ultraviolet disinfection lamp according to claim 1 or 2, characterized in that: A safety touch switch is provided below the sliding window. The safety touch switch is electrically connected to the ultraviolet lamp. When the sliding window is moved down and closed, the safety touch switch contacts the operating platform, and the ultraviolet lamp is turned on. Conversely, when the sliding window moves upward and opens, the safety touch switch moves away from the operating platform, and the ultraviolet lamp turns off.

6. The biosafety cabinet with ultraviolet disinfection lamp according to claim 1, characterized in that: The traction mechanism is located on the left and right sides of the installation compartment, respectively in the interlayer space between the inner side panel and the cabinet in the working area. The fixed pulleys are fixed on the corresponding inner side panels, including a first fixed pulley above the corresponding disinfection window and a second fixed pulley above the corresponding sliding window. The traction rope passes through the first fixed pulley, passes above the working area to the second fixed pulley, and is fixed to the hanging hole on the upper edge of the sliding window.

7. The biosafety cabinet with ultraviolet disinfection lamp according to claim 1, characterized in that: The flip plate includes a first plate fixed to the inner side plate, a second plate fixed to the installation compartment, and a pin connecting the two plates. The second plate has the freedom to rotate about the pin as the axis of rotation to the side of the first plate. The cabinet back plate is provided with a limiting protrusion, and the installation compartment rests on the limiting protrusion when it is located in the partition chamber.

8. The biosafety cabinet with ultraviolet disinfection lamp according to claim 1, characterized in that: The cabinet side panel of the partition chamber is provided with a traction rope guide plate, and the traction rope guide plate has an oval horizontal guide hole in the middle, through which the traction rope passes.

9. The biosafety cabinet with ultraviolet disinfection lamp according to claim 1, characterized in that: The installation chamber is Ω-shaped, the ultraviolet lamp is fixed in the groove of the Ω-shape, the lower flange of the Ω-shape is connected to the flip plate, and the upper flange of the Ω-shape is connected to the traction rope.

10. The biosafety cabinet with ultraviolet disinfection lamp according to claim 9, characterized in that: The cabinet side panel of the partition chamber is provided with an arc-shaped guide plate, and the edge of the upper flange of the installation compartment rotates along the extension trajectory of the arc-shaped guide plate.

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