Biosafety laboratory waste gas exhaust hood

Abstract

The utility model discloses a waste gas exhaust hood for a biosafety laboratory, and belongs to the technical field of ventilation equipment. The biological safety laboratory waste gas exhaust hood comprises a conical hood body, the conical hood body comprises a conical sector, a plurality of fixing ribs are fixedly installed on the outer side of the bottom end of the conical sector and distributed at equal intervals, an exhaust cylinder is arranged at the bottom end of the conical hood body, and the outer side of the top end of the exhaust cylinder is fixedly connected with the bottom ends of the fixing ribs. The exhaust cylinder is sleeved with a waste gas flow guide cover, an air filter is installed in the exhaust cylinder, a differential pressure sensor used for detecting air pressure at the two ends of the air filter is arranged on one side of the exhaust cylinder, a controller is arranged on one side of the differential pressure sensor, a through hole is formed in the top end of the exhaust cylinder, and the bottom end of the through hole extends to the bottom end of the exhaust cylinder. According to the utility model, the functions of high-efficiency air exhaust, leakage prevention, waste gas purification and intelligent maintenance can be effectively realized, the environment safety of a laboratory is ensured, and the practical value is higher.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, specifically a ventilation cap for exhausting waste gas in a biosafety laboratory. Background Technology

[0002] Vents are an important component of exhaust systems, and their effective airflow organization is crucial for providing efficient ventilation and preventing fugitive emissions. Biosafety laboratory exhaust involves various pathogenic microorganisms, which can escape and spread through exhaust ducts via gases or aerosols. Based on this, the inventors have discovered the following problems: Currently, most exhaust vents have airflow organization unsuitable for biosafety laboratories, lacking proper airflow deflectors or having improperly designed deflectors, resulting in downward emissions of biosafety waste gas.

[0003] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a biosafety laboratory exhaust hood in order to achieve a more practical purpose. Utility Model Content

[0004] The purpose of this utility model is to provide a ventilation cap for exhaust gas in biosafety laboratories, in order to solve the problem mentioned in the background art that most of the current exhaust gas ventilation caps are not suitable for biosafety laboratories in terms of airflow organization, and that the lack of a flow guide or the unreasonable setting of the flow guide has resulted in the downward emission of biosafety exhaust gas.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0006] A biosafety laboratory exhaust hood includes a conical hood with a conical fan-shaped surface. Several fixing ribs are fixedly installed on the outer side of the bottom end of the conical fan-shaped surface, with equal spacing between the fixing ribs. An exhaust cylinder is located at the bottom end of the conical hood. The outer side of the top end of the exhaust cylinder is fixedly connected to the bottom end of the fixing ribs. An exhaust gas guide hood is fitted onto the outer side of the exhaust cylinder. An air filter is installed inside the exhaust cylinder. A differential pressure sensor for detecting the air pressure across the air filter is located on one side of the exhaust cylinder. A controller is located on one side of the differential pressure sensor. A through hole is located at the top end of the exhaust cylinder, with the bottom end of the through hole extending to the bottom end of the exhaust cylinder.

[0007] Furthermore, the exhaust gas guide hood includes a guide base plate, the inner side of which is fixedly connected to the outer side of the exhaust cylinder, and a guide ring is installed on the outer top of the guide base plate.

[0008] The beneficial effect of adopting the above-mentioned further solution is that by installing a guide ring on the outer side of the top of the guide plate, the direction of the exhaust gas flow is further optimized, so that the exhaust gas can be discharged into the atmosphere more smoothly when leaving the conical wind cap, reducing the generation of turbulence, improving the exhaust effect, and ensuring that the laboratory exhaust gas can be discharged in an orderly manner.

[0009] Furthermore, the top of the guide plate is provided with several rainwater drainage holes.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by opening several rainwater drainage holes at the top of the guide plate, the water accumulated on the exhaust gas guide hood can be quickly discharged, ensuring that the exhaust gas guide hood is always in good working condition, without affecting the exhaust gas emission effect, and maintaining the overall stable performance of the wind cap.

[0011] Furthermore, the air filter is internally provided with glass fiber filter paper, which is folded.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by using a folded glass fiber filter paper, the filtration area is greatly increased, achieving efficient interception of fine particulate matter and harmful microorganisms within a limited space. Furthermore, the differential pressure sensor includes a first detection end and a second detection end. One end of the first detection end is connected to a first PU vent tube, one end of which penetrates the interior of the exhaust cylinder and is located at the bottom of the air filter.

[0013] Furthermore, one end of the second detection end is connected to a second PU vent pipe, one end of which penetrates the interior of the exhaust cylinder and is located at the top of the air filter. The beneficial effect of this further solution is that, through the arrangement of the first and second PU vent pipes, the air pressure difference across the air filter can be detected in real time and accurately. By monitoring the air pressure difference, the filter's clogging status can be understood promptly. When the pressure difference exceeds a set threshold, it indicates that the filter needs to be replaced or cleaned, ensuring the continuous and efficient operation of the exhaust system.

[0014] Furthermore, a signal line is provided between the controller and the differential pressure sensor, and the controller and the differential pressure sensor are electrically connected through the signal line.

[0015] The beneficial effect of adopting the above-mentioned further solution is that by setting up a signal line between the controller and the differential pressure sensor, electrical signals can be reliably transmitted, ensuring that differential pressure data is accurately and timely transmitted to the controller, guaranteeing the real-time performance and accuracy of the entire monitoring system, and providing a basic guarantee for the intelligent operation of the laboratory exhaust system. Compared with existing technologies, the beneficial effects of this utility model are as follows: This biosafety laboratory exhaust hood, through its conical fan-shaped design, effectively guides airflow, reduces airflow turbulence, and ensures smoother exhaust. Several fixing ribs are fixedly installed on the outer bottom of the conical fan, firmly connecting it to the exhaust cylinder and enhancing the stability of the entire hood structure. An exhaust gas guide hood is fitted onto the outer side of the exhaust cylinder, effectively preventing external debris from entering the exhaust system, protecting internal components, and reducing equipment maintenance costs. A controller is located on one side of the differential pressure sensor to receive real-time data from the sensor and analyze it according to a preset program. A guide ring is installed on the outer top of the guide plate to further optimize the exhaust gas flow direction, allowing the exhaust gas to flow more smoothly upwards into the atmosphere as it leaves the conical hood, reducing turbulence, improving exhaust efficiency, and ensuring orderly discharge of laboratory exhaust gas. Several rainwater drainage holes are located at the top of the guide plate to quickly drain water from the exhaust gas guide hood. Water accumulation ensures the exhaust gas guide hood remains in good working condition, does not affect exhaust gas emission efficiency, and maintains the overall stability of the hood's performance. The folded glass fiber filter paper significantly increases the filtration area, achieving efficient interception of fine particles and harmful microorganisms within a limited space. The first and second PU vent pipes allow for real-time and accurate detection of the air pressure difference across the air filter. Monitoring this difference enables timely assessment of filter blockage; when the pressure difference exceeds a set threshold, it prompts for filter replacement or cleaning, ensuring the continuous and efficient operation of the exhaust system. A signal line between the controller and the pressure difference sensor reliably transmits electrical signals, ensuring accurate and timely transmission of pressure difference data to the controller, guaranteeing the real-time performance and accuracy of the entire monitoring system. This provides a fundamental guarantee for the intelligent operation of the laboratory exhaust system. This invention effectively achieves efficient exhaust, leak prevention, exhaust gas purification, and intelligent maintenance functions, ensuring laboratory environmental safety and possessing high practical value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure disclosed in the embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the conical fan-shaped structure disclosed in the embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the fixing rib structure disclosed in an embodiment of the present utility model;

[0019] Figure 4This is a schematic diagram of the flow guide ring structure disclosed in an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the flow guide base plate structure disclosed in an embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of airflow according to an embodiment of the present invention.

[0022] In the diagram: 1. Conical hood; 101. Conical fan surface; 102. Fixing rib; 2. Exhaust gas guide hood; 201. Guide base plate; 202. Guide ring; 203. Rainwater drain hole; 3. Air filter; 4. Exhaust cylinder; 401. Through hole; 5. Differential pressure sensor; 501. First PU vent pipe; 502. Second PU vent pipe; 6. Controller; 7. Signal line. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-6 This utility model provides a technical solution: a biosafety laboratory exhaust hood, including a conical hood 1, the conical hood 1 including a conical fan surface 101, a plurality of fixing ribs 102 fixedly installed on the outer side of the bottom end of the conical fan surface 101, the plurality of fixing ribs 102 being evenly distributed between each other, an exhaust cylinder 4 provided at the bottom end of the conical hood 1, the outer side of the top end of the exhaust cylinder 4 being fixedly connected to the bottom end of the fixing ribs 102, an exhaust gas guide hood 2 fitted on the outer side of the exhaust cylinder 4, an air filter 3 installed inside the exhaust cylinder 4, a differential pressure sensor 5 for detecting the air pressure at both ends of the air filter 3 provided on one side of the exhaust cylinder 4, a controller 6 provided on one side of the differential pressure sensor 5, and a top end of the exhaust cylinder 4 being... There is a through hole 401, the bottom end of which extends to the bottom end of the exhaust cylinder 4. The conical fan 101 can effectively guide the airflow and reduce airflow turbulence, making the exhaust gas discharge smoother. Several fixing ribs 102 are fixedly installed on the outer side of the bottom end of the conical fan 101 to firmly connect the conical fan 101 to the exhaust cylinder 4, enhancing the stability of the entire wind cap structure. An exhaust gas guide hood 2 is fitted on the outer side of the exhaust cylinder 4 to effectively block external debris from entering the exhaust system, protect internal components, and reduce equipment maintenance costs. A controller 6 is provided on one side of the differential pressure sensor 5 to receive real-time data from the differential pressure sensor and analyze and process it according to a preset program.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 The exhaust gas hood 2 includes a guide plate 201, the inner side of which is fixedly connected to the outer side of the exhaust cylinder 4. A guide ring 202 is installed on the outer top of the guide plate 201. Several rainwater drainage holes 203 are opened at the top of the guide plate 201. The air filter 3 has glass fiber filter paper inside, which is folded. The guide ring 202 installed on the outer top of the guide plate 201 further optimizes the exhaust gas flow direction, so that the exhaust gas flows more smoothly upward when leaving the conical hood 1. The exhaust gas is discharged into the atmosphere, reducing turbulence and improving ventilation. This ensures that laboratory exhaust gas can be discharged in an orderly manner. Several rainwater drainage holes 203 are provided at the top of the guide plate 201 to quickly remove water accumulated on the exhaust gas guide hood 2, ensuring that the exhaust gas guide hood 2 is always in good working condition and does not affect the exhaust gas emission effect. This maintains the overall stability of the hood's performance. The glass fiber filter paper is folded, which greatly increases the filtration area and achieves efficient interception of fine particulate matter and harmful microorganisms in a limited space.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-6The differential pressure sensor 5 includes a first detection end and a second detection end. One end of the first detection end is connected to a first PU vent pipe 501, which penetrates the interior of the exhaust cylinder 4 and is located at the bottom of the air filter 3. One end of the second detection end is connected to a second PU vent pipe 502, which also penetrates the interior of the exhaust cylinder 4 and is located at the top of the air filter 3. A signal line 7 is provided between the controller 6 and the differential pressure sensor 5, and the controller 6 and the differential pressure sensor 5 are connected by the signal line 7. Electrical connection, through the setting of the first PU vent pipe 501 and the second PU vent pipe 502, allows for real-time and accurate detection of the air pressure difference across the air filter 3. By monitoring the air pressure difference, the blockage status of the filter can be understood in a timely manner. When the pressure difference exceeds the set threshold, it prompts that the filter needs to be replaced or cleaned, ensuring the continuous and efficient operation of the exhaust system. A signal line 7 is provided between the controller 6 and the differential pressure sensor 5 to reliably transmit electrical signals, ensuring that the differential pressure data is accurately and timely transmitted to the controller 6, guaranteeing the real-time performance and accuracy of the entire monitoring system, and providing a basic guarantee for the intelligent operation of the laboratory exhaust system.

[0029] Specifically, the working principle of this biosafety laboratory exhaust hood is as follows: During use, the conical fan 101 effectively guides airflow, reducing turbulence and ensuring smoother exhaust. Several fixing ribs 102 are fixedly installed on the outer bottom of the conical fan 101, ensuring a secure connection between the conical fan 101 and the exhaust cylinder 4, enhancing the stability of the entire hood structure. An exhaust gas guide hood 2 is fitted onto the outer side of the exhaust cylinder 4, effectively preventing external debris from entering the exhaust system, protecting internal components, and reducing... To reduce equipment maintenance costs, a controller 6 is installed on one side of the differential pressure sensor 5 to receive real-time data from the sensor and analyze it according to a preset program. A guide ring 202 is installed on the outer side of the top of the guide plate 201 to further optimize the exhaust gas flow direction, allowing the exhaust gas to flow more smoothly upwards into the atmosphere when leaving the conical hood 1, reducing turbulence and improving ventilation efficiency, ensuring that laboratory exhaust gas can be discharged in an orderly manner. Several rainwater drainage holes 203 are opened at the top of the guide plate 201 to quickly remove exhaust gas. The water accumulation on the deflector 2 ensures that the exhaust gas deflector 2 is always in good working condition, does not affect the exhaust gas emission effect, and maintains the overall stability of the hood performance. The folded glass fiber filter paper greatly increases the filtration area, achieving efficient interception of fine particulate matter and harmful microorganisms in a limited space. The setting of the first PU vent pipe 501 and the second PU vent pipe 502 can detect the air pressure difference across the air filter 3 in real time and accurately. By monitoring the air pressure difference, the clogging status of the filter can be understood in time. When the pressure difference exceeds the set threshold, it prompts that the filter needs to be replaced or cleaned, ensuring the continuous and efficient operation of the exhaust system. A signal line 7 is set between the controller 6 and the differential pressure sensor 5 to reliably transmit electrical signals, ensuring that the differential pressure data is accurately and timely transmitted to the controller 6, ensuring the real-time performance and accuracy of the entire monitoring system, and providing a basic guarantee for the intelligent operation of the laboratory exhaust system. This utility model can effectively realize efficient exhaust, leakage prevention, exhaust gas purification and intelligent maintenance functions, ensuring the safety of the laboratory environment and has high practical value.

Claims

1. A ventilation cap for exhaust gas in a biosafety laboratory, characterized in that, The device includes a conical wind cap (1), which includes a conical fan surface (101). Several fixing ribs (102) are fixedly installed on the outer side of the bottom end of the conical fan surface (101). The fixing ribs (102) are evenly distributed. An exhaust cylinder (4) is provided at the bottom end of the conical wind cap (1). The outer side of the top end of the exhaust cylinder (4) is fixedly connected to the bottom end of the fixing ribs (102). An exhaust gas guide hood (2) is fitted on the outer side of the exhaust cylinder (4). An air filter (3) is installed inside the exhaust cylinder (4). A differential pressure sensor (5) for detecting the air pressure at both ends of the air filter (3) is provided on one side of the exhaust cylinder (4). A controller (6) is provided on one side of the differential pressure sensor (5). A through hole (401) is provided at the top end of the exhaust cylinder (4). The bottom end of the through hole (401) extends to the bottom end of the exhaust cylinder (4).

2. The exhaust hood for a biosafety laboratory according to claim 1, characterized in that, The exhaust gas guide hood (2) includes a guide base plate (201), the inner side of the guide base plate (201) and the outer side of the exhaust cylinder (4) are fixedly connected, and a guide ring (202) is installed on the outer side of the top of the guide base plate (201).

3. The exhaust hood for a biosafety laboratory according to claim 2, characterized in that, The top of the guide plate (201) is provided with several rainwater drainage holes (203).

4. The exhaust hood for a biosafety laboratory according to claim 1, characterized in that, The air filter (3) has glass fiber filter paper inside, and the glass fiber filter paper is folded.

5. The exhaust hood for a biosafety laboratory according to claim 1, characterized in that, The differential pressure sensor (5) includes a first detection end and a second detection end. One end of the first detection end is connected to a first PU vent pipe (501). One end of the first PU vent pipe (501) penetrates the interior of the exhaust cylinder (4). One end of the first PU vent pipe (501) is located at the bottom of the air filter (3).

6. The exhaust hood for a biosafety laboratory according to claim 5, characterized in that, One end of the second detection end is connected to a second PU vent pipe (502), one end of the second PU vent pipe (502) penetrates the interior of the exhaust cylinder (4), and one end of the second PU vent pipe (502) is located at the top of the air filter (3).

7. The exhaust hood for a biosafety laboratory according to claim 1, characterized in that, A signal line (7) is provided between the controller (6) and the differential pressure sensor (5), and the controller (6) and the differential pressure sensor (5) are electrically connected through the signal line (7).

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