Novel high-leakproofness non-pipe air purification type ventilation cabinet

Abstract

The utility model discloses a novel high-leakproofness non-pipe air purification type ventilation cabinet which comprises a main cabinet body chamber, a working inner groove is formed in the front face of the main cabinet body chamber, a working table top is fixedly arranged at the bottom in the working inner groove, a back plate is fixedly arranged on the front face in the working inner groove, and a plurality of evenly-distributed air inlets are fixedly formed in the back plate. According to the novel high-leakproofness non-pipe air purification type ventilation cabinet, a large-area horizontal laminar flow mode is adopted, so that air flow in the cabinet is stably, smoothly, uniformly and thoroughly discharged; air flow dead angles are eliminated, turbulent flow and reverse flow are prevented from being formed, and the use safety is improved; the HEPA filter and the chemical gas filter are used in a combined mode, particulate matter and chemical gas in working airflow are removed at the same time, and the adaptability of equipment is improved; the permanent HEPA filter is introduced, double insurance is provided for particulate matter filtering, and meanwhile the requirement of'bag-in and bag-out 'when the HEPA filter is replaced is perfectly met.

Description

Technical Field

[0001] The utility model relates to the technical field of fume hoods, in particular to a novel highly airtight, ductless, clean air fume hood. Background Art

[0002] In specialized laboratories for drug development, virus research, criminal investigation, and fine chemical engineering, highly biologically active and toxic powder and liquid samples often require manipulation (weighing, dissolving, diluting, packaging, and transferring). Handling these samples generates gaseous pollutants such as dust, aerosols, and volatilized chemical gases. If left uncontrolled, these pollutants can not only directly impact the health of laboratory workers but also pollute the laboratory's indoor air and atmosphere. Therefore, specialized equipment is required to provide a safe, reliable, and high-performance operating environment for these samples. While ensuring the timely and efficient removal and disposal of pollutants, these equipment also places higher demands on airtightness to prevent air leaks. For samples with higher risk, the airtightness of handling equipment must meet the OEB (Occupational Exposure Boundary) Level 5 sample handling specifications, and HEPA filter replacement must comply with "bag-in, bag-out" regulations to prevent harmful dust from escaping and causing secondary contamination of the indoor air. Because conventional full-exhaust or clean-air fume hoods cannot meet these airtight requirements, expensive and inconvenient equipment such as glove boxes are the only alternative.

[0003] Traditional fume hoods have the following defects:

[0004] (1) The first type of full-exhaust duct ventilation equipment: including full-exhaust fume hoods, universal suction hoods and various duct-type special ventilation equipment. The airflow in this type of equipment is non-laminar. Generally, the chemical gases and particulate waste gases generated by the experiment are pumped through the ventilation ducts inside the building to a fixed location for centralized filtration and treatment before being discharged into the atmosphere. The prominent disadvantages of this type of technology are: high equipment installation costs, requiring a large number of ventilation ducts and engineering operations; reliability is difficult to guarantee, and the sealing of each device and its connecting parts along the entire ventilation path must be very reliable to ensure the reliability of the system; high energy consumption and low energy utilization, especially when the indoor constant temperature airflow is replaced by outdoor air, which brings a lot of air conditioning energy consumption; poor mobility, once installed and positioned, there is almost no possibility of movement;

[0005] (2) The second type of ductless clean air fume hood equipped with a single filter zone: the gas transmission pipeline and exhaust gas treatment device of the full-exhaust fixed ventilation system are replaced with a built-in gas filtration system to treat the polluted gas generated by the experiment on site. The disadvantages of this technology are: the airtightness of the equipment and the smoothness of the air flow cannot meet the requirements of high-risk sample operation; the filter replacement needs to be completed in the off state, and the particulate matter components adsorbed on the filter may bring a certain degree of secondary pollution risk to the air environment in the ductless fume hood and the laboratory, which does not meet the "bag in bag out" specification requirements. Utility Model Content

[0006] The present invention aims to provide a novel, highly airtight, ductless, clean air fume hood to address the first problem of full-exhaust duct ventilation equipment proposed in the above-mentioned background art: including full-exhaust duct ventilation equipment, universal suction hoods, and various duct-type special ventilation equipment. The airflow in such equipment is non-laminar, and chemical gases and particulate matter waste gas generated by the experiment is generally pumped to a fixed location through ventilation ducts inside the building for centralized filtration and treatment before being discharged into the atmosphere. The prominent disadvantages of such technology are: high equipment installation cost, requiring a large amount of ventilation ducts and engineering work; difficulty in ensuring reliability, requiring each device and its connecting parts to be highly sealed along the entire ventilation path to ensure system reliability; high energy consumption and low energy utilization, especially when the indoor constant temperature air flow is replaced by outdoor air, resulting in a large amount of air conditioning energy consumption; poor mobility, once installed and positioned, almost no possibility of movement; second, ductless clean air fume hood with a single filter zone: using a built-in gas filtration system to replace the gas transmission ducts and waste gas treatment equipment of the full-exhaust fixed ventilation system, the polluted gas generated by the experiment is treated on-site. The disadvantages of this technology are: the equipment's airtightness and airflow stability cannot meet the requirements of high-risk sample operations; the filter replacement needs to be completed when the machine is turned off, and the particulate matter adsorbed on the filter may bring a certain degree of secondary pollution risk to the air environment in the ductless fume hood and the laboratory, which does not meet the "bag in bag out" specification requirements.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of highly airtight ductless clean air fume hood, comprising a main cabinet chamber, a working inner groove is provided on the front of the main cabinet chamber, a work surface is fixedly provided at the bottom of the working inner groove, a back plate is fixedly provided on the front of the working inner groove, a plurality of evenly distributed air inlets are fixedly provided on the back plate, a control turn block is fixedly provided on one side of the front of the main cabinet chamber, the main cabinet chamber is made of high-density polypropylene sheet material, a primary pre-filter and a main high-efficiency HEPA filter are fixedly installed in sequence at the lower part of one side of the main cabinet chamber, the An upper installation chamber is fixedly installed on the top of the main cabinet room, a permanent high-efficiency HEPA filter is fixedly installed on the bottom of the upper installation chamber, a bonded activated carbon filter is fixedly installed on the top of the permanent high-efficiency HEPA filter, and a spark-free blower located above the bonded activated carbon filter is fixedly installed on the top of the upper installation chamber. The rotation of the spark-free blower will generate a stable negative pressure in the internal air flow channel; several large-area square ventilation holes covering the entire rear wall are opened on the rear wall of the working area in the cabinet. Within the area of ​​the ventilation holes, the airflow pressure is close to constant, forming an ideal horizontal laminar flow from the front window to the rear wall in the working area.

[0008] Preferably, a storage room is fixedly connected to the bottom of the main cabinet room, and two double doors are hinged on the front of the storage room. The storage room is used to place required items.

[0009] Preferably, a U-shaped handle is fixedly provided on the front of each of the two double doors, and the U-shaped handle is used to open the double doors.

[0010] Preferably, a display light is fixedly provided on one side of the working inner tank, and the display light is used to illuminate the working inner tank.

[0011] Preferably, a meter is placed on the top of the work surface, and a protective wall is snap-connected to the top of the meter. The work surface is used for placing items for use.

[0012] Preferably, a plurality of evenly distributed adding bottles are placed on one side of the top of the work surface, and the adding bottles are used to add required auxiliary materials.

[0013] Preferably, a plurality of evenly distributed five-hole sockets are fixedly provided at the bottom of the front of the main cabinet chamber, wherein a protective shell is snap-connected to the front of one of the five-hole sockets, and the five-hole socket is used for power supply.

[0014] Preferably, a brand design panel is provided on the top of the front of the main cabinet room, and heat dissipation holes and an inspection panel are fixedly provided on one side of the main cabinet room in sequence, and the inspection panel is used for the inspection of the main cabinet room.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. It adopts a large-area horizontal laminar flow pattern, allowing the airflow in the cabinet to be discharged smoothly, evenly, and thoroughly; 2. It eliminates airflow dead spots, prevents turbulence and backflow, and improves safety in use; 3. By combining a high-efficiency HEPA filter and a chemical gas filter, it simultaneously removes particulate matter and chemical gases from the working airflow, expanding the adaptability of the equipment; 4. The introduction of a permanent HEPA filter provides double protection for particulate matter filtration while perfectly meeting the "bag-in, bag-out" requirement for HEPA filter replacement. This equipment is of great significance to air safety in chemical laboratories, life science laboratories, environmental research laboratories, and criminal investigation laboratories. It effectively protects laboratory operators from toxic and harmful chemical gases and particulate matter (including highly hazardous microbial aerosols, pharmaceutical dust, drug dust, etc.); this innovation not only ensures reliability and safety during normal operation of the equipment, but also ensures extremely high safety during filter replacement and when filter performance deteriorates. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 2 This is a left side sectional view of the main cabinet chamber of the present invention;

[0018] Figure 3 It is an enlarged view of part A of the present invention.

[0019] In the figure: 1. Main cabinet room; 2. Storage room; 3. Double door; 4. U-shaped handle; 5. Working inner groove; 6. Work surface; 7. Display light; 8. Back panel; 9. Air inlet; 10. Meter; 11. Protective wall; 12. Adding bottle; 13. Control switch; 14. Five-hole socket; 15. Protective shell; 16. Heat dissipation hole; 17. Brand design board; 18. Inspection panel; 19. Main high-efficiency HEPA filter; 20. Primary pre-filter; 21. Upper installation chamber; 22. Permanent high-efficiency HEPA filter; 23. Bonded activated carbon filter; 24. Spark-free fan. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-3The utility model provides a new type of highly sealed ductless clean air fume hood, comprising a main cabinet chamber 1, a working inner groove 5 is opened on the front of the main cabinet chamber 1, a work table 6 is fixedly arranged at the bottom of the working inner groove 5, a back plate 8 is fixedly arranged on the front of the working inner groove 5, a plurality of evenly distributed air inlets 9 are fixedly arranged on the back plate 8, a control turn block 13 is fixedly arranged on one side of the front of the main cabinet chamber 1, the main cabinet chamber 1 is made of high-density polypropylene sheet material, a primary pre-filter 20 and a main high-efficiency HEPA filter 19 are fixedly installed in sequence at the bottom of one side of the main cabinet chamber 1, an upper installation chamber 21 is fixedly arranged on the top of the main cabinet chamber 1, a permanent high-efficiency HEPA filter 22 is fixedly installed at the bottom of the upper installation chamber 21, a bonded activated carbon filter 23 is fixedly installed on the top of the permanent high-efficiency HEPA filter 22, and a spark-free fan 24 located above the bonded activated carbon filter 23 is fixedly installed on the top of the upper installation chamber 21.

[0022] When in use, it adopts an innovative "dual filtration zone - multiple filtration" layout. The "dual filtration zone" refers to the main HEPA filtration zone on the rear wall and the auxiliary filtration zone on the top. The "multiple filtration" refers to a set of primary pre-filters 20 in the main HEPA filtration zone, a set of permanent HEPA filters in the auxiliary filtration zone, and an optional set of chemical gas filters.

[0023] The bottom of the main cabinet room 1 is fixedly connected to a storage room 2, and two double doors 3 are hinged on the front of the storage room 2. The front of the two double doors 3 are fixedly provided with a U-shaped handle 4, and a display light 7 is fixedly provided on one side of the working inner groove 5. A meter 10 is placed on the top of the work surface 6, and the top of the meter 10 is snap-connected with a protective wall 11.

[0024] When in use, the bottom of the main cabinet chamber 1 is connected to the storage chamber 2, and two double doors 3 are hinged on the front of the storage chamber 2, and the storage chamber 2 is opened through the double doors 3.

[0025] A plurality of evenly distributed additive bottles 12 are placed on one side of the top of the work surface 6, and a plurality of evenly distributed five-hole sockets 14 are fixedly provided at the bottom of the front of the main cabinet chamber 1. A protective shell 15 is snap-connected to the front of one of the five-hole sockets 14, and a brand design board 17 is provided on the top of the front of the main cabinet chamber 1. A heat dissipation hole 16 and an inspection panel 18 are fixedly provided on one side of the main cabinet chamber 1 in sequence.

[0026] When in use, a plurality of evenly distributed five-hole sockets 14 are provided at the bottom of the front of the main cabinet chamber 1 , and the five-hole sockets 14 are used for plugging in.

[0027] In specific use, the utility model is a new type of highly airtight ductless clean air fume hood. When in use, a spark-free fan 24 is provided on the top of the equipment, and the rotation of the fan will generate a stable negative pressure in the internal air flow channel; several large-area square ventilation holes covering the entire rear wall are opened on the rear wall of the working area of ​​the main cabinet room 1; within the ventilation hole area, the air flow pressure is close to constant, and an ideal horizontal laminar flow is formed from the front window to the rear wall in the working area; the airtightness of the main cabinet room 1 and the internal air flow channel is crucial, and gas leakage will seriously affect the safety of the equipment; the structure of the main cabinet room 1 is made of 8mm thick high-density polypropylene sheets that are hot-melt seamlessly welded to eliminate the possibility of gas leakage from each connection, thereby obtaining overall good airtightness. In order to ensure the use requirements of the filtration system in a highly airtight ductless clean air fume hood, an original "double filtration zone-multiple filtration" layout is adopted; "double filtration zone" refers to the main HEPA filtration zone located on the back wall and the auxiliary filtration zone located on the top, and "multiple filtration" refers to a group of primary pre-filters 20 in the main HEPA filtration zone, as well as a group of permanent HEPA filters and a group of optional chemical gas filters in the auxiliary filtration zone. This is the use process of this new type of highly airtight ductless clean air fume hood.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel high-sealing ductless clean air fume hood, comprising a main cabinet chamber (1), characterized in that: The front of the main cabinet chamber (1) is provided with a working inner groove (5), the bottom of the working inner groove (5) is fixedly provided with a working table (6), the front of the working inner groove (5) is fixedly provided with a back plate (8), the back plate (8) is fixedly provided with a plurality of evenly distributed air inlets (9), a control turn block (13) is fixedly provided on one side of the front of the main cabinet chamber (1), the main cabinet chamber (1) is made of a high-density polypropylene sheet, and the lower part of one side of the main cabinet chamber (1) is fixedly provided with A primary pre-filter (20) and a main high-efficiency HEPA filter (19) are provided, an upper installation chamber (21) is fixedly provided on the top of the main cabinet chamber (1), a permanent high-efficiency HEPA filter (22) is fixedly installed on the bottom of the upper installation chamber (21), a bonded activated carbon filter (23) is fixedly installed on the top of the permanent high-efficiency HEPA filter (22), and a spark-free blower (24) located above the bonded activated carbon filter (23) is fixedly installed on the top of the upper installation chamber (21).

2. A novel high-sealed ductless air purification fume hood according to claim 1, characterized in that: The bottom of the main cabinet chamber (1) is fixedly connected to a storage chamber (2), and the front of the storage chamber (2) is hinged with two double doors (3).

3. A novel high-sealing ductless air purification fume hood according to claim 2, characterized in that: A U-shaped handle (4) is fixedly provided on the front of each of the two double doors (3).

4. A novel high-sealing ductless air purification fume hood according to claim 1, characterized in that: A display light (7) is fixedly provided on one side of the working inner tank (5).

5. The novel high-sealed ductless air purification fume hood according to claim 1 is characterized in that: A meter (10) is placed on the top of the work surface (6), and a protective wall (11) is snap-connected to the top of the meter (10).

6. A novel high-sealed ductless air purification fume hood according to claim 1, characterized in that: A plurality of evenly distributed addition bottles (12) are placed on one side of the top of the work surface (6).

7. A novel high-sealed ductless air purification fume hood according to claim 1, characterized in that: A plurality of evenly distributed five-hole sockets (14) are fixedly provided at the bottom of the front of the main cabinet chamber (1), wherein a protective shell (15) is snap-connected to the front of one of the five-hole sockets (14).

8. The novel high-sealed ductless air purification fume hood according to claim 1 is characterized by: A brand design plate (17) is provided on the top of the front of the main cabinet chamber (1), and a heat dissipation hole (16) and an inspection plate (18) are fixedly provided in sequence on one side of the main cabinet chamber (1).

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