Ventilation cabinet with fresh air purification function
By introducing a fan filter unit and an exhaust fan into the fume hood, combined with a clean chamber and a multi-stage filtration device, the problem of traditional fume hoods being unable to purify fresh air is solved, achieving air purification and effective removal of harmful gases within the clean chamber.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN AILANTE TECH CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-07
AI Technical Summary
Traditional fume hoods cannot meet the purification requirements for fresh air entering the hood, especially when harmful gases need to be exhausted, they cannot provide clean fresh air.
A fume hood with fresh air purification function was designed. It uses a fan filter unit and an exhaust fan, combined with a clean chamber, and uses activated carbon perforated plate, photocatalytic filter and ultraviolet lamp to perform multi-stage filtration and purification of gas, and then discharges it outdoors through the baffle assembly.
It achieves high air cleanliness within the clean chamber, effectively purifying harmful gases such as formaldehyde, benzene, toluene, xylene, ammonia, and TVOC, ensuring the safety of the experimental environment, and facilitating the replacement of filter components.
Smart Images
Figure CN224463401U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fume hood technology, specifically a fume hood with a fresh air purification function. Background Technology
[0002] Cabinet-type exhaust hoods, commonly known as fume hoods, are similar to sealed hoods. Chemical laboratory fume hoods are a typical structure of cabinet-type exhaust hoods. Traditional fume hoods are open on one side and usually have sliding doors. When researchers are conducting experiments inside, the airflow from the laboratory, i.e., the fresh air from the fume hood, enters directly through the open side where the researcher is standing, and then exhausts toxic and harmful gases to the outside through the exhaust duct, ensuring the safety and health of the researchers. However, the air entering the fume hood is not purified or filtered. In experiments that generate harmful gases requiring exhaust and where purification of the incoming fresh air is necessary, traditional fume hoods cannot meet the requirements. Currently, existing fume hoods do not have a clean fresh air function; therefore, providing a fume hood that combines clean fresh air functionality is a problem that this invention urgently needs to solve. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a fume hood with a fresh air purification function, which has the characteristics of compact structure and cleanliness function.
[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a fume hood with a fresh air purification function, the fume hood with a fresh air purification function includes a fume hood cabinet body, a fan filter unit installed on the fume hood cabinet body and connected to an air inlet channel located inside the fume hood cabinet body, and an exhaust fan installed on the fume hood cabinet body and connected to an air outlet channel located inside the fume hood cabinet body. The fume hood cabinet body is provided with a clean chamber located inside the fume hood cabinet body, and the clean chamber is connected to the air inlet channel and the air outlet channel respectively.
[0005] The fume hood is equipped with a control panel that synchronously controls the air intake of the fan filter unit and the air output of the exhaust fan.
[0006] The fan filter unit includes a housing, which is fixedly installed on the fume hood cabinet. A circular groove is opened inside the housing, and a second magnetic block is fixedly installed inside the circular groove. A first magnetic block is magnetically attracted to the second magnetic block. An ultraviolet lamp is fixedly installed on the inner wall of the housing. A fixing frame is fixedly installed inside the housing, and a fan is fixedly installed inside the fixing frame.
[0007] The housing has an internal bracket with three slots. The three slots are equally spaced and are connected in sequence from top to bottom to a first activated carbon perforated plate, a second activated carbon perforated plate, and a photocatalytic filter. A cover plate is fixedly installed on the bracket, and a filter is fixedly installed on the cover plate. A handle is fixedly installed on the cover plate. The first magnetic block is fixedly installed at the bottom of the bracket.
[0008] Preferably, the clean chamber is located in the middle of the fume hood, the air inlet channel is located on the side of the fume hood, and the air outlet channel is located at the top of the fume hood.
[0009] Preferably, the bottom of the air inlet channel is flush with the bottom of the clean chamber, or the bottom of the air inlet channel extends beyond the bottom of the clean chamber; an air inlet is provided on the side of the air inlet channel closest to the clean chamber.
[0010] Preferably, the air inlet is provided with an air intake grille.
[0011] Preferably, the width of the air intake grille is equal to or less than the width of the cleanroom.
[0012] Preferably, two fan filter units are symmetrically arranged on the fume hood body, opposite to the exhaust fan. The two fan filter units are respectively connected to the clean chamber through corresponding air inlet channels, and the two air inlet channels are respectively located on the left and right sides of the fume hood body.
[0013] Preferably, the air outlet channel includes a guide channel placed inside the clean chamber and located behind the clean chamber, and an air collection hood installed inside the fume hood and connected to the guide channel. The air outlet of the air collection hood is connected to the exhaust fan through an air outlet pipe.
[0014] Preferably, the flow channel includes a vertically arranged flow guide plate assembly and a flow guide back plate disposed on the back of the flow guide plate assembly and forming a gas discharge chamber with the flow guide plate assembly. The flow guide plate assembly is provided with a flow channel inlet for gas to enter the gas discharge chamber through the flow guide plate assembly.
[0015] Preferably, the guide plate assembly consists of at least two guide plates arranged vertically, with a gap between the upper guide plate and the lower guide plate, the gap being the inlet of the guide channel.
[0016] The advantages of this utility model are:
[0017] 1. By adopting the above structure, the natural fresh air at the operation surface of the traditional fume hood is transformed into clean fresh air filtered by the top fan filter unit. By using the fan filter unit and the exhaust fan, a good clean experimental environment is continuously obtained in the clean chamber. After the gas is purified by the fan filter unit, it enters the clean chamber through the air inlet of the clean chamber through the air inlet channels on both sides, which can well ensure the air cleanliness of the clean chamber. Then, it is discharged to the outside through the air outlet channel, air outlet pipe and exhaust fan by the baffle assembly.
[0018] 2. By setting a first activated carbon perforated plate, a second activated carbon perforated plate, and a photocatalytic filter inside the shell, the gas can be filtered and purified in multiple stages. Under the irradiation of ultraviolet lamp, the photocatalytic filter can be excited to generate free radicals with extremely strong oxidizing effect, which oxidize and decompose toxic and harmful pollutants such as formaldehyde, benzene, toluene, xylene, ammonia, and TVOC into harmless CO2 and H2O, thereby achieving the purification of harmful gases.
[0019] 3. When it is necessary to replace the first activated carbon plate, the second activated carbon plate, and the photocatalytic filter in the fan filter unit, the fixing bracket is magnetically fixed inside the housing. The user can lift the cover plate and the fixing bracket from the housing through the handle on the cover plate, which makes it convenient to replace the filter components. Attached Figure Description
[0020] Figure 1 This is a perspective view of a fume hood with a fresh air purification function according to this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of a fume hood with fresh air purification function according to this utility model;
[0022] Figure 3 This is a schematic diagram of the structure of the air guide plate assembly in a fume hood with fresh air purification function according to this utility model;
[0023] Figure 4 This is a schematic diagram of the structure of the fan filter unit of this utility model;
[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the shell of this utility model;
[0025] Figure 6 This is a schematic diagram of the internal structure of the housing of this utility model;
[0026] Figure 7 This is a schematic diagram of the cover plate structure of this utility model;
[0027] Figure 8 This is a schematic diagram of the insert structure of this utility model.
[0028] In the diagram: 1. Fume hood body; 2. Air inlet duct; 3. Fan and filter unit; 301. Shell; 302. Mounting bracket; 303. Fan; 304. Cover plate; 305. Insert bracket; 306. First activated carbon perforated plate; 307. Second activated carbon perforated plate; 308. Photocatalytic filter; 309. Slot; 310. First magnetic block; 311. Slot; 312. Second magnetic block; 313. Ultraviolet lamp; 314. Filter screen; 315. Handle; 4. Air outlet duct; 41. Air guide duct; 411. Air guide plate; 412. Gas exhaust chamber; 413. Air guide back plate; 414. Air guide duct inlet; 42. Gas collection hood; 5. Air outlet duct; 6. Control panel; 7. Air inlet grille; 8. Exhaust fan. Detailed Implementation
[0029] 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.
[0030] Please see Figure 1-8 The technical solution of this utility model is as follows: a fume hood with a fresh air purification function, comprising a fume hood body 1, a fan-filter unit 3 installed on the fume hood body 1 and connected to an air inlet channel 2 located inside the fume hood body 1, and an exhaust fan 8 installed on the fume hood body 1 and connected to an air outlet channel 4 located inside the fume hood body 1. A clean chamber is provided on the fume hood body 1, and the clean chamber is connected to both the air inlet channel 2 and the air outlet channel 4. A control panel 6 is provided on the fume hood body 1 to synchronously control the air intake of the fan-filter unit 3 and the air exhaust of the exhaust fan 8.
[0031] The fan filter unit 3 includes a housing 301, which is fixedly installed on the fume hood cabinet 1. A circular groove 309 is opened inside the housing 301. A second magnetic block 312 is fixedly installed inside the circular groove 309. A first magnetic block 310 is magnetically attracted to the second magnetic block 312. An ultraviolet lamp 313 is fixedly installed on the inner wall of the housing 301. A fixing frame 302 is fixedly installed inside the housing 301. A fan 303 is fixedly installed inside the fixing frame 302.
[0032] The housing 301 contains a mounting bracket 305 with three slots 311 evenly spaced. A first activated carbon perforated plate 306, a second activated carbon perforated plate 307, and a photocatalytic filter 308 are sequentially inserted into the three slots 311 from top to bottom. A cover plate 304 is fixedly mounted on the mounting bracket 305, and a filter 314 is fixedly mounted on the cover plate 304. A handle 315 is also fixedly mounted on the cover plate 304. A first magnetic block 310 is fixedly mounted at the bottom of the mounting bracket 305. By using the first activated carbon perforated plate 306, the second activated carbon perforated plate 307, and the photocatalytic filter 308 inside the housing 301, the gas can be subjected to multiple... The system employs a multi-stage filtration and purification process. Its photocatalytic filter 308, under the irradiation of an ultraviolet lamp 313, generates free radicals with extremely strong oxidizing properties, oxidizing and decomposing toxic and harmful pollutants such as formaldehyde, benzene, toluene, xylene, ammonia, and TVOC into harmless CO2 and H2O, thereby purifying harmful gases. When replacing the first activated carbon perforated plate 306, the second activated carbon perforated plate 307, and the photocatalytic filter 308 in the fan filter unit 3, the fixing bracket 302 is magnetically fixed inside the housing 301. Users can easily remove the cover plate 304 and the fixing bracket 302 from the housing 301 using the handle 315 on the cover plate 304, facilitating the replacement of the filter components.
[0033] By adopting the above structure, the natural fresh air at the operating surface of the traditional fume hood is transformed into clean fresh air filtered by the top fan filter unit 3. Using the fan filter unit 3 and the exhaust fan 8, a continuously clean experimental environment is achieved within the cleanroom. After being purified by the fan filter unit 3, the gas enters the cleanroom through the air inlet vents on both sides 2, effectively ensuring the air cleanliness of the cleanroom. The gas is then discharged outdoors via the baffle assembly, air outlet vent 4, air outlet pipe 5, and exhaust fan 8.
[0034] In this invention, the cleanroom is located in the middle of the fume hood body 1, the air inlet channel 2 is located on the side of the fume hood body 1, and the air outlet channel 4 is located on the top of the fume hood body 1. The bottom of the air inlet channel 2 is flush with the bottom of the cleanroom, or the bottom of the air inlet channel 2 extends beyond the bottom of the cleanroom. An air inlet is provided on the side of the air inlet channel 2 closest to the cleanroom. An air inlet grille 7 is provided on the air inlet, and the width of the air inlet grille 7 is equal to or less than the width of the cleanroom.
[0035] To ensure sufficient airflow, two fan filter units 3 are symmetrically arranged on the fume hood body 1, opposite to the exhaust fan 8. The two fan filter units 3 are connected to the clean chamber through corresponding air inlet channels 2. The two air inlet channels 2 are located on the left and right sides of the fume hood body 1, respectively.
[0036] The air outlet channel 4 of this utility model includes a guide channel 41 placed inside a clean chamber and located behind the clean chamber, and a gas collection hood 42 installed inside the fume hood 1 and connected to the guide channel 41. The air outlet of the gas collection hood 42 is connected to the exhaust fan 8 through an air outlet pipe 5. The guide channel 41 includes a vertically arranged guide plate assembly and a guide back plate 413 installed on the back of the guide plate assembly and forming a gas exhaust chamber 412 with the guide plate assembly. The guide plate assembly is provided with a guide channel inlet 414 for gas to enter the gas exhaust chamber 412 through the guide plate assembly. The guide plate assembly consists of at least two guide plates 411 arranged vertically, with a gap between the upper guide plate 411 and the lower guide plate 411, which is the guide channel inlet 414.
[0037] The specific working process is as follows: After the gas is purified by the fan filter unit 3, it enters the clean chamber through the air inlet of the clean chamber via the air inlet 2 on both sides, which can well ensure the air cleanliness of the clean chamber. Then, it is discharged to the outside through the air outlet 4, air outlet 5, and exhaust fan 8 via the baffle assembly.
[0038] This utility model provides a fume hood with a fresh air purification function. There are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.
Claims
1. A fume hood with fresh air purification function, characterized in that: The fume hood with fresh air purification function includes a fume hood body (1), a fan filter unit (3) installed on the fume hood body (1) and connected to the air inlet channel (2) inside the fume hood body (1), and an exhaust fan (8) installed on the fume hood body (1) and connected to the air outlet channel (4) inside the fume hood body (1). The fume hood body (1) is provided with a clean chamber inside the fume hood body (1), and the clean chamber is connected to the air inlet channel (2) and the air outlet channel (4) respectively. The fume hood cabinet (1) is equipped with a control panel (6) that synchronously controls the air intake of the fan filter unit (3) and the air exhaust of the fan (8); The fan filter unit (3) includes a housing (301), which is fixedly installed on the fume hood cabinet (1). A circular groove (309) is provided inside the housing (301). A second magnetic block (312) is fixedly installed inside the circular groove (309). A first magnetic block (310) is magnetically attracted to the second magnetic block (312). An ultraviolet lamp (313) is fixedly installed on the inner wall of the housing (301). A fixing frame (302) is fixedly installed inside the housing (301). A fan (303) is fixedly installed inside the fixing frame (302). The housing (301) is provided with a bracket (305) inside. The bracket (305) has three slots (311) with equal spacing. The first activated carbon perforated plate (306), the second activated carbon perforated plate (307), and the photocatalytic filter (308) are inserted into the three slots (311) from top to bottom. A cover plate (304) is fixedly installed on the bracket (305). A filter (314) is fixedly installed on the cover plate (304). A handle (315) is fixedly installed on the cover plate (304). The first magnetic block (310) is fixedly installed at the bottom of the bracket (305).
2. A fume hood with fresh air purification function as described in claim 1, characterized in that: The clean chamber is located in the middle of the fume hood (1), the air inlet channel (2) is located on the side of the fume hood (1), and the air outlet channel (4) is located on the top of the fume hood (1).
3. A fume hood with fresh air purification function as described in claim 2, characterized in that: The bottom of the air inlet channel (2) is flush with the bottom of the clean chamber, or the bottom of the air inlet channel (2) extends beyond the bottom of the clean chamber; an air inlet is provided on the side of the air inlet channel (2) closest to the clean chamber.
4. A fume hood with fresh air purification function as described in claim 3, characterized in that: An air intake grille (7) is provided on the air intake.
5. A fume hood with fresh air purification function as described in claim 4, characterized in that: The width of the air intake grille (7) is equal to or less than the width of the clean chamber.
6. A fume hood with fresh air purification function as described in claim 1, characterized in that: The fume hood (1) is symmetrically provided with two fan filter units (3) on the left and right sides of the exhaust fan (8). The two fan filter units (3) are respectively connected to the clean chamber through the corresponding air inlet channels (2). The two air inlet channels (2) are located on the left side and the right side of the fume hood (1).
7. A fume hood with fresh air purification function as described in claim 1, characterized in that: The The air outlet duct (4) includes a guide channel (41) placed inside the clean chamber and located behind the clean chamber, and an air collection hood (42) installed inside the fume hood cabinet (1) and connected to the guide channel (41). The air outlet of the air collection hood (42) is connected to the exhaust fan (8) through an air outlet pipe (5).
8. A fume hood with fresh air purification function as described in claim 7, characterized in that: The flow channel (41) includes a vertically arranged flow guide plate (411) assembly and a flow guide back plate (413) arranged on the back of the flow guide plate (411) assembly and forming a gas discharge chamber (412) with the flow guide plate (411) assembly. The flow guide plate (411) assembly is provided with a flow channel inlet (414) for gas to enter the gas discharge chamber (412) through the flow guide plate (411) assembly.
9. A fume hood with fresh air purification function as described in claim 8, characterized in that: The guide plate (411) assembly consists of at least two guide plates (411) arranged vertically. A gap is provided between the upper guide plate (411) and the lower guide plate (411), and the gap is the inlet (414) of the guide channel.