Laboratory ventilation device
By introducing backflow prevention components and a multi-stage filtration system into the laboratory ventilation system, the problem of harmful gas backflow in the ventilation duct was solved, achieving improvements in safety and environmental protection.
Patent Information
- Application Number
- CN202520415502.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-11
AI Technical Summary
When existing laboratory ventilation systems stop operating, harmful gases in the ventilation ducts can easily flow back into the laboratory, affecting air quality and posing a threat to personnel health.
A laboratory ventilation device was designed, which uses an anti-backflow component to automatically shut off when the exhaust component stops running. Combined with a multi-stage filtration system, including a coarse filter, an activated carbon filter, and a HEPA filter, it prevents exhaust gas from flowing back and ensures that the exhaust gas meets environmental standards.
It effectively prevents the backflow of harmful gases, improves safety in use, and ensures the environmental friendliness of the emitted gases, reducing pollution to the environment.
Smart Images
Figure CN223916257U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a ventilation equipment technical field, concretely relates to a laboratory ventilation device. BACKGROUND
[0002] The laboratory ventilation device is one of the indispensable equipment in the laboratory environment, and its main function is to discharge harmful gas generated in the experiment process to ensure the air quality in the laboratory and ensure the health and safety of the experiment personnel.
[0003] The existing laboratory ventilation device usually discharges waste gas into the ventilation pipeline through the fan driven by the motor each time, however, although the ventilation equipment can effectively output waste gas when running, some harmful gas in the laboratory is easy to remain inside the ventilation pipeline after the equipment stops running, since the harmful gas remains inside the ventilation pipeline, when the ventilation equipment stops running, these residual gas is easy to backflow into the laboratory from the opening of the air suction cover, this backflow phenomenon not only affects the air quality in the laboratory, but also may threaten the health of the experiment personnel, and there is a safety hazard.
[0004] Therefore, the laboratory ventilation device is provided. UTILITY MODEL CONTENTS
[0005] The utility model discloses a laboratory ventilation device.
[0006] The utility model discloses a laboratory ventilation device to realize the following technical scheme in the specific adoption:
[0007] A laboratory ventilation device, comprising an air suction cover, the inner side top of the air suction cover is fixedly installed with an air suction port, the end of the air suction port is fixedly installed with an anti-reverse assembly, the output end of the air suction cover is fixedly connected with an air extraction assembly, the output end of the air extraction assembly is fixedly connected with an exhaust pipe, and the output end of the exhaust pipe is connected with a rear filter to filter and discharge waste gas.
[0008] Further, the inner wall of the air suction cover is fixedly installed with a mesh plate, and the air suction cover and the mesh plate are made of stainless steel material.
[0009] Further, the anti-reverse assembly comprises a sealing end cover fixedly installed at the end of the air suction port, the surface of the sealing end cover is provided with an opening, the top surface of the opening is fixedly installed with a side plate, a spring shaft is rotatably inserted into the side plate, a sealing plate is fixedly sleeved on the surface of the spring shaft, the sealing plate and the opening on the surface of the sealing end cover are correspondingly arranged, and the bottom surface of the sealing plate and the top surface of the sealing end cover are in contact when stopping running.
[0010] Further, the air exhaust assembly comprises a shell fixedly installed at the output end of the air suction cover, an air exhaust pipe fixedly connected to the output end of the shell, and a motor mounting frame fixedly installed on the inner wall of the shell, the inside of the motor mounting frame is fixedly inserted with an electric motor, and the output end of the electric motor is fixedly connected with a fan blade.
[0011] Further, the end of the air exhaust pipe is fixedly connected with a filter box, the inside of the filter box is filled with a coarse filter screen, an activated carbon filter screen and a HEPA filter screen for filtering waste gas, and a metal screen is detachably installed at the end of the filter box.
[0012] Further, the front side wall of the air suction cover is provided with a controller for controlling the on-off and rotating speed of the electric motor.
[0013] The beneficial effects of the utility model are as follows:
[0014] When the air exhaust assembly stops running, the sealing plate of the anti-reverse assembly is automatically closed under the action of the spring shaft, preventing the waste gas in the air exhaust assembly and the air exhaust pipe from flowing back to the laboratory, effectively avoiding the backflow of harmful gas and improving the use safety;
[0015] The end of the air exhaust pipe is connected with the filter box, the inside of which is filled with the coarse filter screen, the activated carbon filter screen and the HEPA filter screen, so that the waste gas can be filtered in multiple stages, ensuring that the discharged waste gas meets the environmental protection standard and reducing the pollution to the environment. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is the three-dimensional structure schematic diagram of the utility model;
[0017] Figure 2 is the bottom view of the utility model;
[0018] Figure 3 is the front sectional view of the utility model;
[0019] Figure 4 is the schematic diagram of the anti-reverse assembly closing of the utility model;
[0020] Figure 5 is the schematic diagram of the anti-reverse assembly opening of the utility model;
[0021] Drawing reference: 1, air suction cover; 11, screen plate; 2, air suction port; 3, anti-reverse assembly; 301, sealing end cover; 302, opening; 303, side plate; 304, spring shaft; 305, sealing plate; 4, air exhaust assembly; 401, shell; 402, motor mounting frame; 403, electric motor; 404, fan blade; 5, air exhaust pipe; 6, rear filter; 601, filter box; 602, coarse filter screen; 603, activated carbon filter screen; 604, HEPA filter screen; 605, metal screen; 7, controller. DETAILED DESCRIPTION
[0022] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.
[0024] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0025] In the description of the embodiments of the present application, it should be noted that the directions or position relationships indicated by the terms "inner", "outer", "upper", etc. are based on the directions or position relationships shown in the drawings, or the directions or position relationships commonly placed when the product of the present application is used, which are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular direction, be constructed and operated in a particular direction, therefore, cannot be understood as limiting the present application.
[0026] As shown in Figures 1 to 5 A laboratory ventilation device, comprising a suction hood 1, a suction port 2 is fixedly installed on the inner top of the suction hood 1, a reverse prevention assembly 3 is fixedly installed at the end of the suction port 2, an air extraction assembly 4 is fixedly connected to the output end of the suction hood 1, an exhaust pipe 5 is fixedly connected to the output end of the air extraction assembly 4, and a rear filter 6 is connected to the output end of the exhaust pipe 5 to filter and discharge waste gas. More specifically, the suction hood 1 is subjected to suction force by the air extraction assembly 4, and the reverse prevention assembly 3 is in an open state (as shown in Figure 5 The laboratory waste enters the exhaust pipe 5 through the suction hood 1, and the rear filter 6 at the end of the exhaust pipe 5 filters and discharges the waste gas, and when the use is stopped, the reverse prevention assembly 3 is in a closed state (as shown in Figure 4As shown in the figure, this prevents the backflow of residual exhaust gas in the exhaust assembly 4 and exhaust pipe 5, thus improving safety during use.
[0027] A mesh plate 11 is fixedly installed on the inner wall of the suction hood 1, and both the suction hood 1 and the mesh plate 11 are made of stainless steel. More specifically, by making the suction hood 1 and the mesh plate 11 of stainless steel, they are corrosion resistant, thus improving safety during use.
[0028] The anti-backflow component 3 includes a sealing end cap 301 fixedly installed at the end of the air intake 2. An opening 302 is formed on the surface of the sealing end cap 301, and a side plate 303 is fixedly installed on the top surface of the opening 302. A spring shaft 304 is rotatably inserted into the side plate 303, and a sealing plate 305 is fixedly sleeved on the surface of the spring shaft 304. The sealing plate 305 and the opening 302 on the surface of the sealing end cap 301 are correspondingly arranged. When operation stops, the bottom surface of the sealing plate 305 contacts the top surface of the sealing end cap 301. More specifically, when the exhaust component 4 operates, the sealing plate 305 is flipped by the side plate 303 under the action of airflow, opening the top of the opening 302. After the exhaust component 4 stops operating, the elastic force of the side plate 303 causes the sealing plate 305 to adhere to the top surface of the sealing end cap 301, sealing the opening 302 and preventing backflow of exhaust gas from the exhaust component 4 and the exhaust pipe 5.
[0029] The exhaust assembly 4 includes a housing 401 fixedly installed at the output end of the suction hood 1, an exhaust pipe 5 fixedly connected to the output end of the housing 401, and a motor mounting bracket 402 fixedly installed on the inner wall of the housing 401. A motor 403 is fixedly inserted into the motor mounting bracket 402, and a fan blade 404 is fixedly connected to the output end of the motor 403. More specifically, the motor 403 drives the fan blade 404 to rotate, thereby generating suction in the suction hood 1 and the suction port 2, so that the exhaust gas flows through the exhaust pipe 5 to the post-filter 6.
[0030] A filter box 601 is fixedly connected to the end of the exhaust pipe 5. The filter box 601 is filled with a coarse filter 602, an activated carbon filter 603, and a HEPA filter 604 for filtering exhaust gas. A metal mesh 605 is detachably installed at the end of the filter box 601. More specifically, the exhaust gas is filtered through the coarse filter 602, activated carbon filter 603, and HEPA filter 604 inside the filter box 601 to ensure that the discharged exhaust gas is safe.
[0031] A controller 7 is provided on the front side wall of the suction hood 1 to control the switching and rotation speed of the motor 403. More specifically, the controller 7 enables the switching and rotation speed of the motor 403 to control the suction force for extracting exhaust gas.
[0032] In summary: by the suction assembly 4, and then make the inside of the suction hood 1 produce suction, in the operation of the suction assembly 4, its anti-reverse assembly 3 is in the open state, the laboratory waste is into the exhaust pipe 5 through the suction hood 1, through the filter 6 at the end of the exhaust pipe 5, and then make the exhaust gas filtering treatment, when stop using, at the same time, the anti-reverse assembly 3 is in the closed state, avoid the waste gas in the suction assembly 4 and the exhaust pipe 5 reverse flow, improve the safety when using.
[0033] The basic principle, main characteristics and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.
Claims
1. A laboratory ventilation device, characterized in that, The utility model provides an exhaust hood, including the suction hood (1), the inner side top of suction hood (1) is fixedly installed with the suction port (2), and the end of suction port (2) is fixedly installed with the anti-reverse subassembly (3), the output of suction hood (1) is fixedly connected with the exhaust component (4), the output of exhaust component (4) is fixedly connected with the exhaust pipe (5), and the output of exhaust pipe (5) is connected with the rear filter (6), to filter exhaust emission.
2. A laboratory fume hood as defined in claim 1, wherein, The inner wall of the suction hood (1) is fixedly installed with a mesh plate (11), and the suction hood (1) and the mesh plate (11) are made of stainless steel material.
3. A laboratory fume hood as defined in claim 1, wherein, The anti-reverse subassembly (3) includes a sealing end cover (301) fixedly installed at the end of the suction port (2), the surface of the sealing end cover (301) is provided with an opening (302), the top surface of the opening (302) is fixedly installed with a side plate (303), the side plate (303) is rotatably connected with a spring shaft (304), the surface of the spring shaft (304) is fixedly sleeved with a sealing plate (305), and the sealing plate (305) and the opening (302) on the surface of the sealing end cover (301) are correspondingly arranged, and when the operation is stopped, the bottom surface of the sealing plate (305) is in contact with the top surface of the sealing end cover (301).
4. A laboratory fume hood as defined in claim 1, wherein, The exhaust component (4) includes a housing (401) fixedly installed at the output end of the suction hood (1), the exhaust pipe (5) is fixedly connected at the output end of the housing (401), the inner wall of the housing (401) is fixedly installed with a motor mounting bracket (402), the inside of the motor mounting bracket (402) is fixedly connected with an electric motor (403), and the output end of the electric motor (403) is fixedly connected with a fan blade (404).
5. A laboratory fume hood as defined in claim 1, wherein, The end of the exhaust pipe (5) is fixedly connected with a filter box (601), the inside of the filter box (601) is filled with a coarse filter screen (602), an activated carbon filter screen (603) and a HEPA filter screen (604) for filtering exhaust gas, and the end of the filter box (601) is detachably installed with a metal mesh (605).
6. A laboratory fume hood as defined in claim 4, wherein, The front side wall of the suction hood (1) is provided with a controller (7) for controlling the switch and rotating speed of the electric motor (403).