Biosafety cabinet with stable structure
By using down-pressure bolt strips and screw clamping brackets in the biosafety cabinet, and reducing gaps through the exhaust mesh plate, the biological leakage problem caused by fan vibration is solved, the air tightness and airflow stability are improved, and the air flow stability is ensured. Operator and environment safety.
Patent Information
- Application Number
- CN202421151958.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The blower of the existing biosafety cabinet is prone to vibration, resulting in a gap between the air outlet and the filter element, and the risk of biological leakage is prone to occur after long-term use.
The fan and the exhaust mesh plate are clamped and fixed by pressing the bolt strip, and pressurized and locked with the screw clamping bracket. The edge of the clamping slot is snapped into the limit slot strip to improve the air between the structures The density prevents shaking and creates structural gaps, and reduces the gap between the filter element and the inner wall of the cabinet through the exhaust mesh plate, so as to evenly distribute the air flow to prevent disturbing flow.
It effectively improves the airtightness of the biosafety cabinet, prevents biological leakage, ensures the safety of the operator and the environment, and reduces the instability of the airflow blown by the fan and the generation of spoiler.
Smart Images
Figure CN222287342U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of biological safety cabinets, and in particular relates to a biological safety cabinet with a stable structure. Background Art
[0002] Biosafety cabinets are equipment used in laboratories to protect experimental operators, experimental samples and the environment from biological hazards. They are designed to meet specific biosafety and bioprotection standards. The basic function of a biosafety cabinet is to provide a safe working environment when conducting microbiological experiments, prevent pathogens in experimental samples from being released into the environment, and protect experimental operators from infection. However, the fan generates vibrations, causing a gap between the air outlet and the filter element to exist over time. This gap may cause microorganisms in the air to escape, increasing the risk to the operator and the environment. In order to solve this problem, the designers of biosafety cabinets have conducted a lot of research and testing, and continuously improved the structure and materials of biosafety cabinets. Utility Model Content
[0003] In order to overcome the problem of existing biological safety cabinets, because the fan is prone to vibration, resulting in a gap between the air outlet and the filter element, the risk of biological leakage is prone to occur during long-term use.
[0004] The technical solution of the utility model is: a biological safety cabinet with a stable structure, including a biological safety cabinet component and a cabinet bracket; the cabinet bracket is arranged at the lower end of the biological safety cabinet component, and the cabinet bracket is fixedly connected to the shell of the biological safety cabinet component; the biological safety cabinet component includes a cabinet body, a negative pressure chamber, a positive pressure filter chamber, a fan, a filter element, an exhaust mesh plate, a ventilation bracket, a downward pressure bolt strip, a screw clamping bracket, a slot clamping edge, and a limit slot strip.
[0005] Preferably, the fan and the exhaust mesh plate are clamped and fixed with the filter element therein by pressing down the bolt strip, and the screw clamping bracket is pressurized and locked. At this time, the clamping edge of the slot on the outer side of the lower end of the pressing down bolt strip is clamped into the inner side of the lower end of the limit slot strip, which effectively improves the air tightness between the structures and prevents shaking from causing structural gaps. This solves the problem of existing biological safety cabinets, because the fan is prone to vibration when blowing, resulting in a gap between the air outlet and the filter element, which poses a risk of biological leakage under long-term use.
[0006] Preferably, a negative pressure chamber is provided inside the cabinet; a positive pressure filter chamber is provided above the negative pressure chamber; a fan is provided inside the positive pressure filter chamber; and a filter element is provided at the lower end of the fan.
[0007] Preferably, an exhaust mesh plate is provided at the lower end of the filter element; downward pressure bolt strips are provided around the filter element, and the upper end of the downward pressure bolt strip is fixedly connected to the casing of the fan, and the bolts of the downward pressure bolt strip are threadedly fixedly connected to the exhaust mesh plate. The exhaust mesh plate effectively reduces the gap between the filter element and the inner wall of the cabinet, and evenly distributes the airflow blown out by the fan downward, thereby improving the airflow stability and preventing the generation of turbulence.
[0008] Preferably, screw clamping brackets are provided on both sides of the filter element, and the lower ends of the screw clamping brackets are threadedly fixedly connected to the exhaust mesh plate, and the upper ends of the screw clamping brackets are pressed down and clamped to the two side edges of the fan.
[0009] Preferably, a ventilation bracket is provided at the lower end of the exhaust mesh plate, and the ventilation bracket is fixedly connected to the inner wall of the positive pressure filter chamber.
[0010] Preferably, limit slots are provided on the inner sides above both ends of the exhaust mesh plate, and the limit slots are integrally formed with the exhaust mesh plate.
[0011] Preferably, limiting slot strips are arranged around the lower end of the filter element, and the limiting slot strips are fixedly connected to the filter element, and the limiting slot strips are fixedly connected to the limiting slot strip slots. The fan and the exhaust mesh plate are clamped and fixed by pressing down the bolt strips, and the screw clamping bracket is pressurized and locked. At this time, the slot clamping edge on the outer side of the lower end of the pressing down bolt strip is clamped into the inner side of the lower end of the limiting slot strip, which effectively improves the air tightness between the structures and prevents shaking from causing structural gaps.
[0012] Beneficial effects of the utility model:
[0013] The existing biological safety cabinet has a problem that the fan of the existing biological safety cabinet is prone to vibration, resulting in a gap between the air outlet and the filter element, which is prone to the risk of biological leakage in long-term use; the fan and the exhaust mesh plate are clamped and fixed to the filter element by pressing the bolt strip, and the screw clamping bracket is pressurized and locked, at which time the clamping edge of the slot on the outer side of the lower end of the pressing bolt strip is clamped into the inner side of the lower end of the limit slot strip, effectively improving the air tightness between the structures to prevent shaking and causing structural gaps; the problem that the existing biological safety cabinet has a problem that the fan of the existing biological safety cabinet is prone to vibration, resulting in a gap between the air outlet and the filter element, which is prone to the risk of biological leakage in long-term use;
[0014] By setting the exhaust mesh plate, the exhaust mesh plate effectively reduces the gap between the filter element and the inner wall of the cabinet, and evenly distributes the airflow blown out by the fan downward, thereby improving the airflow stability and preventing the generation of turbulence. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 What is shown is a schematic diagram of the overall three-dimensional structure of a biological safety cabinet with a stable structure according to the utility model;
[0016] Figure 2 What is shown is a schematic diagram of the overall internal three-dimensional structure of a biological safety cabinet with a stable structure according to the utility model;
[0017] Figure 3 Shown is a schematic diagram of a three-dimensional structure of a blower, filter element, exhaust screen, and ventilation bracket of a biological safety cabinet with a stable structure of the utility model;
[0018] Figure 4 Shown is a schematic diagram of the three-dimensional structure of an exhaust mesh plate of a biological safety cabinet with a stable structure according to the utility model.
[0019] The markings in the accompanying drawings are: 1. Biosafety cabinet assembly; 2. Cabinet bracket; 101. Cabinet body; 102. Negative pressure chamber; 103. Positive pressure filter chamber; 104. Fan; 105. Filter element; 106. Exhaust mesh plate; 107. Ventilation bracket; 108. Pressing bolt strip; 109. Screw clamping bracket; 110. Slot clamping edge; 111. Limiting slot strip. DETAILED DESCRIPTION
[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0021] See also Figure 1-4 The utility model provides an embodiment: a biological safety cabinet with a stable structure, including a biological safety cabinet component 1, and also including a cabinet bracket 2; the cabinet bracket 2 is provided at the lower end of the biological safety cabinet component 1, and the cabinet bracket 2 is fixedly connected to the shell of the biological safety cabinet component 1; the biological safety cabinet component 1 includes a cabinet body 101, a negative pressure chamber 102, a positive pressure filter chamber 103, a fan 104, a filter element 105, an exhaust mesh plate 106, a ventilation bracket 107, a downward pressing bolt strip 108, a screw clamping bracket 109, a slot clamping edge 110, and a limit slot strip 111.
[0022] See also Figure 1-4 In the present embodiment, a negative pressure chamber 102 is provided inside the cabinet 101; a positive pressure filter chamber 103 is provided above the negative pressure chamber 102; a fan 104 is provided inside the positive pressure filter chamber 103; a filter element 105 is provided at the lower end of the fan 104, and an exhaust mesh plate 106 is provided at the lower end of the filter element 105; press-down bolt strips 108 are provided around the filter element 105, and the upper end of the press-down bolt strips 108 is fixedly connected to the outer casing of the fan 104, and the bolts of the press-down bolt strips 108 are threadedly fixedly connected to the exhaust mesh plate 106.
[0023] See also Figure 1-4In this embodiment, screw clamping brackets 109 are provided on both sides of the filter element 105, and the lower end of the screw clamping bracket 109 is threadedly fixedly connected to the exhaust mesh plate 106, and the upper end of the screw clamping bracket 109 is pressed down and clamped with the two side edges of the fan 104, and the lower end of the exhaust mesh plate 106 is provided with a ventilation bracket 107, and the ventilation bracket 107 is fixedly connected to the inner wall of the positive pressure filter chamber 103, and limiting card groove strips 111 are provided on the inner side above both ends of the exhaust mesh plate 106, and the limiting card groove strips 111 are integrally formed with the exhaust mesh plate 106, and limiting card groove strips 111 are provided around the lower end of the filter element 105, and the limiting card groove strips 111 are fixedly connected to the filter element 105, and the limiting card groove strips 111 are fixedly connected with the limiting card groove strips 111 by card slots.
[0024] When working, the fan 104 and the exhaust mesh plate 106 are clamped and fixed with the filter element 105 therein by pressing down the bolt strip 108, and the screw clamping bracket 109 is pressurized and locked. At this time, the clamping edge 110 of the slot on the outer side of the lower end of the pressing bolt strip 108 is clamped into the inner side of the lower end of the limit slot strip 111, which effectively improves the air tightness between the structures and prevents shaking from causing structural gaps; it solves the problem of the existing biological safety cabinet that the fan is prone to vibration when blowing, resulting in a gap between the air outlet and the filter element, and the risk of biological leakage is prone to occur under long-term use;
[0025] Next, the exhaust mesh plate 106 effectively reduces the gap between the filter element 105 and the inner wall of the cabinet 101, and evenly distributes the airflow blown out by the fan 104 and blows it downward, thereby improving the stability of the airflow and preventing the generation of turbulence.
[0026] Through the above steps, the fan 104 and the exhaust mesh plate 106 are clamped and fixed with the filter element 105 therein by pressing down the bolt strip 108, and the screw clamping bracket 109 is pressurized and locked. At this time, the slot clamping edge 110 on the outer side of the lower end of the pressing bolt strip 108 is clamped into the inner side of the lower end of the limiting slot strip 111, which effectively improves the air tightness between the structures and prevents shaking from causing structural gaps, thereby avoiding the problem of the existing biological safety cabinet, because its fan is prone to vibration, resulting in a gap between the air outlet and the filter element, which is prone to the risk of biological leakage under long-term use.
[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.
Claims
1. A biosafety cabinet with a stable structure, comprising a biosafety cabinet assembly (1), characterized in that: The invention also comprises a cabinet support (2); the cabinet support (2) is arranged at the lower end of the biological safety cabinet assembly (1), and the cabinet support (2) is fixedly connected to the outer shell of the biological safety cabinet assembly (1); the biological safety cabinet assembly (1) comprises a cabinet body (101), a negative pressure chamber (102), a positive pressure filter chamber (103), a fan (104), a filter element (105), an exhaust screen (106), a ventilation support (107), a downward pressure bolt strip (108), a screw clamping support (109), a slot clamping edge (110), and a limit slot strip (111); the cabinet body (101) A negative pressure chamber (102) is provided inside; a positive pressure filter chamber (103) is provided above the negative pressure chamber (102); a fan (104) is provided inside the positive pressure filter chamber (103); a filter element (105) is provided at the lower end of the fan (104); an exhaust mesh plate (106) is provided at the lower end of the filter element (105); downward pressure bolt strips (108) are provided around the filter element (105), and the upper end of the downward pressure bolt strip (108) is fixedly connected to the housing of the fan (104), and the bolts of the downward pressure bolt strip (108) are threadedly fixedly connected to the exhaust mesh plate (106).
2. A biological safety cabinet with a stable structure according to claim 1, characterized in that: Screw clamping brackets (109) are provided on both sides of the filter element (105), and the lower ends of the screw clamping brackets (109) are threadedly fixedly connected to the exhaust mesh plate (106), and the upper ends of the screw clamping brackets (109) are pressed downward and clamped to the edges of both sides of the fan (104).
3. A biological safety cabinet with a stable structure according to claim 1, characterized in that: A ventilation bracket (107) is provided at the lower end of the exhaust mesh plate (106), and the ventilation bracket (107) is fixedly connected to the inner wall of the positive pressure filter chamber (103).
4. A biological safety cabinet with a stable structure according to claim 1, characterized in that: Limiting slots (111) are provided on the inner sides above both ends of the exhaust mesh plate (106), and the limiting slots (111) and the exhaust mesh plate (106) are integrally formed.
5. The biological safety cabinet with a stable structure according to claim 1, characterized in that: Limiting slot bars (111) are arranged around the lower end of the filter element (105), and the limiting slot bars (111) are fixedly connected to the filter element (105), and the limiting slot bars (111) are fixedly connected to the limiting slot bars (111) by slots.