Laboratory air supplement type ventilation cabinet
By designing partition assembly and fan assembly in the fume hood to form a hot and cold air flow surrounding the operating chamber, the problem of temperature instability of the fume hood under specific temperature conditions is solved, and the accuracy and safety of the experimental results are improved.
Patent Information
- Application Number
- CN202421969716.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-14
AI Technical Summary
During experimental operations under specific temperature conditions, existing fume hoods cannot effectively maintain the temperature stability of the operating area, which affects the accuracy and safety of the experimental results.
A laboratory air-filling fume hood is designed, which divides the housing chamber into an operating chamber and a ventilation chamber through a partition assembly. The air conditioner in the fan assembly inputs cooling or heating gas to form a cold or hot air flow surrounding the operating chamber. The mixed gas is quickly extracted with the deflector and the exhaust fan, keeping the temperature of the operating chamber stable, and the experimental progress is observed through the observation window.
Effectively maintain the temperature environment of the operating chamber, improve the accuracy and safety of the experiment, prevent the spread of harmful substances, and ensure the comfort and health of the experimenter.
Smart Images
Figure CN223077226U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of experimental equipment, and particularly relates to a laboratory make-up air type fume hood. Background Art
[0002] The laboratory make-up air type fume hood is a ventilation device widely used in various laboratories, mainly used to protect laboratory staff from toxic and harmful gases and ensure the cleanliness and safety of the experimental environment. This fume hood introduces outdoor air to supplement the air discharged indoors, thereby maintaining the balance of indoor air and reducing energy consumption.
[0003] The existing make-up air type fume hoods are divided into external make-up air type and internal make-up air type. The external make-up air type usually sets the make-up air inlet at the glass window, and the air flow flows from outside the cabinet into the cabinet and is then extracted by the fan pipeline; the working principle of the internal make-up air type fume hood is to set a make-up air inlet inside the fume hood, so that the air flows downward from the make-up air inlet, passes through the workbench surface, and then is sucked away and discharged by the fan.
[0004] However, for some experimental operations, especially those that require specific temperature conditions, maintaining a stable temperature environment is crucial. However, the existing fume hoods cannot effectively reduce the temperature of the operation area during the experimental operation, which may affect the accuracy of the experimental results. Summary of the Utility Model
[0005] The main purpose of the utility model is to propose a laboratory make-up air type fume hood, aiming to effectively maintain the temperature environment of the operation chamber and improve the accuracy and safety of the experiment.
[0006] To achieve the above object, a laboratory make-up air type fume hood proposed by the utility model includes:
[0007] A cabinet body, which has an accommodation cavity;
[0008] A partition assembly, which is accommodated in the accommodation cavity and divides the accommodation cavity into a connected operation chamber and a ventilation chamber. The ventilation chamber is arranged around the operation chamber, and an operation opening communicating with the operation chamber is provided on the outer side wall of the cabinet body;
[0009] A fan assembly, which includes an air conditioner and an exhaust fan arranged in the ventilation chamber. The air conditioner is used to absorb external gas and input cooling gas or heating gas into the ventilation chamber, and the exhaust fan is used to extract the mixed gas in the operation chamber to the outside; and
[0010] An observation window, which is installed on the cabinet body and at least partially covers the operation opening.
[0011] In one embodiment, the partition assembly includes a first partition, a second partition, a third partition, and a fourth partition that are sequentially connected end to end. The first partition, the second partition, the third partition, and the fourth partition and the opposite side walls of the accommodation cavity enclose an operation cavity; the sides of the first partition, the second partition, the third partition, and the fourth partition facing away from the operation cavity and the cavity wall of the accommodation cavity enclose a ventilation cavity;
[0012] Wherein, the first partition and the third partition are arranged opposite to each other left and right, and the second partition and the fourth partition are arranged opposite to each other up and down; the third partition is provided with an air extraction port communicating with the air extraction end of the exhaust fan, and the fourth partition is provided with a first air blowing port communicating with the ventilation cavity and the operation cavity.
[0013] In one embodiment, the first partition is provided with a second air blowing port communicating with the operation cavity, and the second air blowing port is arranged opposite to the air extraction port;
[0014] The laboratory make-up air type fume hood further includes a deflector, which is accommodated in the ventilation cavity and connected to the first partition. The deflector is used to direct part of the cooling gas or the heating gas in the ventilation cavity to the second air blowing port, so that the cooling gas or the heating gas moves towards the air extraction port.
[0015] In one embodiment, the first partition is provided with a plurality of the second air blowing ports along the up and down direction;
[0016] The laboratory make-up air type fume hood further includes a plurality of deflectors, and the plurality of deflectors are arranged in one-to-one correspondence with the plurality of second air blowing ports. Among them, among the adjacent two deflectors, the deflector area of the deflector located above is smaller than the deflector area of the deflector located below.
[0017] In one embodiment, the partition assembly further includes a fifth partition and a sixth partition arranged in the ventilation cavity. The fifth partition and the sixth partition are connected to the upper and lower sides of the first partition, and both are provided with air passing holes;
[0018] Wherein, the first partition, the fifth partition and the cavity wall of the accommodation cavity jointly enclose a first device cavity; the fifth partition, the first partition, the sixth partition and the cavity wall of the accommodation cavity enclose a diversion cavity; the sixth partition, the fourth partition and the cavity wall of the accommodation cavity enclose a second device cavity;
[0019] The first device cavity, the diversion cavity and the second device cavity are sequentially communicated to form the ventilation cavity; both the first device cavity and the second device cavity are used for installing electrical components.
[0020] In one embodiment, the first partition board, the fifth partition board, and the sixth partition board are all filter boards.
[0021] In one embodiment, the laboratory makeup air type fume hood further includes a front curtain blowing device, which is arranged on the outer side wall of the cabinet body where the operation opening is provided and above the observation window, and is used for blowing downward to form an air curtain.
[0022] In one embodiment, the front curtain blowing device includes an air guide box and a pipeline. The air guide box is connected to the cabinet body, and the pipeline passes through the cabinet body and is communicated with the air conditioner.
[0023] In one embodiment, the laboratory makeup air type fume hood further includes a filter pipe, which is communicated with the air outlet end of the exhaust fan. Along the gas flow direction, a filter screen and an activated carbon layer are sequentially arranged in the filter pipe.
[0024] In one embodiment, the laboratory makeup air type fume hood further includes a diversion fan, which is arranged in the ventilation cavity to accelerate the air flow in the ventilation cavity.
[0025] The laboratory makeup air type fume hood provided by the present application divides the accommodation cavity into an operation cavity and a ventilation cavity through a partition assembly, and the ventilation cavity is arranged around the operation cavity. Such a structure can effectively guide the flow of cooling gas or heating gas. The air conditioner absorbs the external gas and inputs the cooling gas or heating gas into the ventilation cavity to form a cold air flow or a hot air flow surrounding the operation cavity. This helps to keep the temperature of the operation environment stable when conducting experiments or operations in the laboratory, thereby more evenly reducing or increasing the temperature of the operation cavity, avoiding overheating or overcooling from affecting the experimental results or operation safety. Moreover, after passing through the ventilation cavity, the cold air flow or hot air flow can enter the operation cavity, and then the toxic gases and waste gases in the operation cavity are quickly and effectively extracted to the outside by the exhaust fan, which helps to maintain the air quality in the operation cavity, ensure the safety of experimental personnel, and prevent the diffusion of harmful substances in the laboratory. The setting of the observation window not only facilitates the experimental personnel to observe the progress of the experiment without opening the fume hood, but also can avoid the direct entry of uncooled or unheated air from the outside into the operation cavity when the laboratory needs to be sealed, maintaining the temperature balance in the operation cavity. Generally speaking, the design of the laboratory makeup air type fume hood provided by the present application effectively maintains the temperature environment of the operation cavity by introducing cooling gas or heating gas and extracting the mixed gas, improves the accuracy and safety of the experiment, and at the same time ensures the comfort and health of the experimental personnel. Description of the Drawings
[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0027] Figure 1 It is a schematic structural diagram of an embodiment of a laboratory air make-up type fume hood provided by the present invention;
[0028] Figure 2 It is a schematic structural diagram of another embodiment of a laboratory air make-up type fume hood provided by the present invention;
[0029] Figure 3 It is a schematic structural diagram of yet another embodiment of a laboratory air make-up type fume hood provided by the present invention;
[0030] Figure 4 It is a schematic structural diagram of still another embodiment of a laboratory air make-up type fume hood provided by the present invention;
[0031] Figure 5 It is a schematic structural diagram of an embodiment of a filter tube provided by the present invention.
[0032] Explanation of the reference numerals in the drawings:
[0033] 100, laboratory air make-up type fume hood; 1, cabinet body; 11, operation chamber; 12, ventilation chamber; 121, first device chamber; 122, second device chamber; 123, diversion chamber; 13, operation port; 2, partition assembly; 21, first partition; 211, second air blowing port; 22, second partition; 23, third partition; 231, air extraction port; 24, fourth partition; 241, first air blowing port; 25, fifth partition; 26, sixth partition; 3, fan assembly; 31, air conditioner; 32, exhaust fan; 4, observation window; 5, deflector; 6, front curtain air blowing device; 61, air guiding box; 62, pipeline; 7, filter tube; 8, activated carbon layer; 9, filter net.
[0034] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the drawings. Specific embodiments
[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.
[0036] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0038] The present utility model provides a laboratory makeup air type fume hood 100.
[0039] Please refer to Figures 1 to 5 , in an embodiment of the present utility model, the laboratory makeup air type fume hood 100 includes a cabinet body 1, a partition assembly 2, a fan assembly 3, and an observation window 4. The cabinet body 1 has a receiving cavity; the partition assembly 2 is disposed in the receiving cavity and divides the receiving cavity into a connected operation cavity 11 and a ventilation cavity 12. The ventilation cavity 12 surrounds the operation cavity 11, and an operation port 13 communicating with the operation cavity 11 is opened on the outer side wall of the cabinet body 1; the fan assembly 3 includes an air conditioner 31 and an exhaust fan 32 disposed in the ventilation cavity 12. The air conditioner 31 is used to absorb external gas and input cooling gas or heating gas into the ventilation cavity 12, and the exhaust fan 32 is used to extract the mixed gas in the operation cavity 11 to the outside; the observation window 4 is installed on the cabinet body 1 and at least part of its structure covers the operation port 13. The present utility model aims to effectively maintain the temperature environment of the operation cavity 11 and improve the accuracy and safety of the experiment.
[0040] The laboratory air make-up type fume hood 100 provided by the present application divides the accommodation cavity into an operation cavity 11 and a ventilation cavity 12 through a partition assembly 2, and the ventilation cavity 12 is arranged around the operation cavity 11. Such a structure can effectively guide the flow of cooling gas or heating gas. The air conditioner 31 absorbs external gas and inputs cooling gas or heating gas into the ventilation cavity 12 to form a cold air flow or a hot air flow surrounding the operation cavity 11. This helps to maintain the temperature stability of the operation environment during experiments or operations in the laboratory, thereby more evenly reducing or increasing the temperature of the operation cavity 11, avoiding overheating or overcooling from affecting the experimental results or operation safety. Moreover, after passing through the ventilation cavity 12, the cold air flow or hot air flow can enter the operation cavity 11, and then the toxic gases and waste gases in the operation cavity 11 are quickly and effectively extracted to the outside by the exhaust fan 32, which helps to maintain the air quality in the operation cavity 11, ensure the safety of experimental personnel, and prevent the diffusion of harmful substances in the laboratory. The setting of the observation window 4 not only facilitates experimental personnel to observe the progress of the experiment without opening the fume hood, but also can prevent the uncooled or unheated air from the outside from directly entering the operation cavity 11 when the laboratory needs to be sealed, maintaining the temperature balance in the operation cavity 11. Generally speaking, the design of the laboratory air make-up type fume hood 100 provided by the present application effectively maintains the temperature environment of the operation cavity 11 by introducing cooling gas or heating gas and extracting the mixed gas, improves the accuracy and safety of the experiment, and at the same time ensures the comfort and health of experimental personnel.
[0041] In an embodiment of the present application, the partition assembly 2 includes a first partition 21, a second partition 22, a third partition 23, and a fourth partition 24 that are sequentially connected end to end. The first partition 21, the second partition 22, the third partition 23, and the fourth partition 24 enclose an operation chamber 11 with the opposite side walls of the accommodation chamber; on the side of the first partition 21, the second partition 22, the third partition 23, and the fourth partition 24 facing away from the operation chamber 11, they enclose a ventilation chamber 12 with the chamber wall of the accommodation chamber; it should be noted that according to the shape of the square body of the cabinet body 1, the chamber wall of the accommodation chamber refers to all the side walls that enclose the accommodation chamber, including multiple side walls in the up-down, left-right, front-back directions, and the opposite side walls of the accommodation chamber refer to two side walls in a relative position among all the side walls, that is, the front and back side walls, the left and right side walls, or the up and down side walls. With such a setting, the ventilation chamber 12 can have four interconnected chambers in the up-down, front-back directions. During the process of cold air or hot air entering the operation chamber 11 along the ventilation chamber 12, it can cool or heat the surrounding environment of the operation chamber 11, which is equivalent to always placing the operation chamber 11 in an environment with a stable temperature, and the effect is excellent. In this embodiment, considering that the waste located in the operation chamber 11 needs to be taken out, the two side walls in the relative position mentioned above refer to the front and back side walls. Specifically, the first partition 21 and the third partition 23 are arranged relatively left and right, and the second partition 22 and the fourth partition 24 are arranged relatively up and down; the fan assembly 3 is arranged on the side of the third partition 23 facing away from the operation chamber 11, that is, on the left or right side of the cabinet body 1. During installation, the operator can install it through the cabinet door provided on the left or right side. Further, the third partition 23 is provided with an air extraction port 231 that communicates with the air extraction end of the exhaust fan 32, and the fourth partition 24 is provided with a first air blowing port 241 that communicates with the ventilation chamber 12 and the operation chamber 11. The air extraction port 231 provided on the third partition 23 enables the mixed gas in the operation chamber 11 to be effectively extracted and discharged, thereby maintaining the air quality in the operation chamber 11 and preventing harmful gases from escaping into the laboratory environment. The first air blowing port 241 provided on the fourth partition 24 allows the cooling gas or heating gas to flow from the ventilation chamber 12 into the operation chamber 11, further reducing the temperature of the operation area, and at the same time providing a supplement of fresh air, improving the experimental operation environment.
[0042] In an embodiment of the present application, the first partition plate 21 is provided with a second air outlet 211 communicating with the operation chamber 11. The second air outlet 211 is disposed opposite to the air suction port 231. Therefore, after waste gas is generated in the operation chamber 11, the cooling or heating gas blown in through the second air outlet 211 entangles the waste gas from left to right to the air suction port 231, thereby accelerating the extraction speed of the waste gas, further ensuring the safety of the experimental personnel, and preventing harmful substances from diffusing in the laboratory. Further, the laboratory makeup air type fume hood 100 further includes a flow guide plate 5. The flow guide plate 5 is accommodated in the ventilation chamber 12 and connected to the first partition plate 21. The flow guide plate 5 is used to direct a part of the cooling gas or heating gas in the ventilation chamber 12 to the second air outlet 211, so that the cooling gas or heating gas moves toward the air suction port 231. The flow guide plate 5 can be a straight plate or an arc plate. Through the flow guide plate 5, the cooling or heating gas can be guided from the ventilation chamber 12 to the second air outlet 211 and move toward the air suction port 231, avoiding local temperature gradients and dead corners, and ensuring the temperature uniformity in the operation chamber 11.
[0043] In an embodiment of the present application, the first partition plate 21 is provided with a plurality of second air outlets 211 along the up and down direction; the arrangement of the plurality of second air outlets 211 can form a plurality of lateral movement airflows in the operation chamber 11, which helps to more quickly guide the gas in the operation chamber 11, and can more evenly distribute the cooling or heating gas, providing a more stable experimental environment. The laboratory makeup air type fume hood 100 further includes a plurality of flow guide plates 5. The plurality of flow guide plates 5 are arranged in one-to-one correspondence with the plurality of second air outlets 211. Among them, among two adjacent flow guide plates 5, the flow guide area of the flow guide plate 5 located above is smaller than the flow guide area of the flow guide plate 5 located below. The increasing of the flow guide area can enable each flow guide plate 5 to play a role.
[0044] In an embodiment of the present application, the partition plate assembly 2 further includes a fifth partition plate 25 and a sixth partition plate 26 disposed in the ventilation chamber 12. The fifth partition plate 25 and the sixth partition plate 26 are connected to the upper and lower sides of the first partition plate 21, and both are provided with air passing holes. Among them, the first partition plate 21, the fifth partition plate 25 and the chamber wall of the accommodation chamber jointly enclose and form a first device chamber 121; the fifth partition plate 25, the first partition plate 21, the sixth partition plate 26 and the chamber wall of the accommodation chamber enclose and form a flow guide chamber 123; the sixth partition plate 26, the fourth partition plate 24 and the chamber wall of the accommodation chamber enclose and form a second device chamber 122; the first device chamber 121, the flow guide chamber 123 and the second device chamber 122 are sequentially communicated to form the ventilation chamber 12. The first device chamber 121 and the second device chamber 122 are both used for installing electrical components (such as the main unit of the control system, the wireless communication module, the main unit of the camera, etc.). In this way, the electrical components with slightly larger heat generation can be disposed in the first device chamber 121 with a lower temperature, and the electrical components with slightly smaller heat generation can be disposed in the second device chamber 122 with a higher temperature, which not only makes full use of the ventilation chamber 12, but also can play a role in balancing the heat distribution.
[0045] In an embodiment of the present application, the first partition 21, the fifth partition 25, and the sixth partition 26 are all filter plates. Being set as filter plates can effectively maintain the air quality inside the fume hood and reduce the impact of pollutants on experimental operations.
[0046] In an embodiment of the present application, the laboratory makeup air type fume hood 100 further includes a front curtain blowing device 6. The front curtain blowing device 6 is arranged on the outer side wall of the cabinet body 1 where the operation opening 13 is provided and is located above the observation window 4, and is used for blowing downward to form an air curtain. The air curtain can block pollutants, harmful gases, and particulate matters in the external air from directly entering the inside of the fume hood, reduce interference with experimental operations, and also prevent the gas inside the fume hood from escaping from the cabinet body 1, so as to reduce the airflow faced by the operator and improve the operation comfort.
[0047] In an embodiment of the present application, the front curtain blowing device 6 includes an air guide box 61 and a pipeline 62. The air guide box 61 is connected to the cabinet body 1, and the pipeline 62 passes through the cabinet body 1 and is communicated with the air conditioner 31. The air guide box 61 is connected to the cabinet body 1 and is communicated with the air conditioner 31 through the pipeline 62, so that the air processed by the air conditioner 31 can be guided into the air guide box 61 and then blown downward through the air guide box 61 to form an air curtain covering the operation opening 13.
[0048] In an embodiment of the present application, the laboratory makeup air type fume hood 100 further includes a filter pipe 7. The filter pipe 7 is communicated with the air outlet end of the exhaust fan 32. Along the gas flow direction, a filter net 9 and an activated carbon layer 8 are sequentially arranged in the filter pipe 7. For the harmful gases that may be generated in the laboratory, the design of the filter pipe 7 ensures that these gases are effectively treated before being discharged from the laboratory, meeting the requirements of environmental protection and safe emission. The activated carbon layer 8 can adsorb organic matters, odors, and harmful gases in the air, thereby purifying the air discharged from the fume hood. The filter net 9 is located before the activated carbon layer 8 and is used to capture particulate matters in the mixed gas, such as dust, bacteria, viruses, etc., to further purify the discharged air.
[0049] In an embodiment of the present application, the laboratory makeup air type fume hood 100 further includes a guide fan, and the guide fan is arranged in the ventilation cavity 12 to accelerate the air flow in the ventilation cavity 12.
[0050] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.
Claims
1. A laboratory makeup air type fume hood, characterized in that, Comprising: A cabinet body having a receiving cavity; A partition assembly received in the receiving cavity and dividing the receiving cavity into a connected operation cavity and a ventilation cavity, the ventilation cavity surrounding the operation cavity, and an operation opening communicating with the operation cavity being provided on an outer side wall of the cabinet body; A fan assembly including an air conditioner and an exhaust fan provided in the ventilation cavity, the air conditioner being configured to absorb external gas and input cooling gas or heating gas into the ventilation cavity, and the exhaust fan being configured to extract the mixed gas in the operation cavity to the outside; and An observation window mounted on the cabinet body and at least partially covering the operation opening.
2. The laboratory makeup air type fume hood according to claim 1, wherein, The partition assembly includes a first partition, a second partition, a third partition, and a fourth partition connected in sequence end to end, and the first partition, the second partition, the third partition, and the fourth partition and opposite side walls of the receiving cavity enclose the operation cavity; A ventilation cavity is formed by enclosing the side of the first partition, the second partition, the third partition, and the fourth partition facing away from the operation cavity and the cavity wall of the receiving cavity; Wherein, the first partition and the third partition are arranged opposite to each other left and right, and the second partition and the fourth partition are arranged opposite to each other up and down; an air extraction opening communicating with the air extraction end of the exhaust fan is provided on the third partition, and a first air blowing opening communicating with the ventilation cavity and the operation cavity is provided on the fourth partition.
3. The laboratory makeup air type fume hood according to claim 2, wherein A second air blowing opening communicating with the operation cavity is provided on the first partition, and the second air blowing opening is arranged opposite to the air extraction opening; The laboratory air supply type fume hood further includes a deflector plate received in the ventilation cavity and connected to the first partition, and the deflector plate is configured to direct part of the cooling gas or the heating gas in the ventilation cavity to the second air blowing opening so that the cooling gas or the heating gas moves towards the air extraction opening.
4. The laboratory makeup air type fume hood according to claim 3, wherein, A plurality of the second air blowing openings are provided on the first partition along the up and down direction; The laboratory air supply type fume hood further includes a plurality of deflector plates, and the plurality of deflector plates are arranged in one-to-one correspondence with the plurality of second air blowing openings. Among them, in two adjacent deflector plates, the deflector area of the deflector plate located above is smaller than the deflector area of the deflector plate located below.
5. The laboratory makeup air type fume hood according to claim 2, wherein The partition assembly further includes a fifth partition and a sixth partition provided in the ventilation cavity, the fifth partition and the sixth partition are connected to the upper and lower sides of the first partition, and both are provided with air passing holes; Wherein, the first partition, the fifth partition and the cavity wall of the receiving cavity jointly enclose a first device cavity; the fifth partition, the first partition, the sixth partition and the cavity wall of the receiving cavity enclose a diversion cavity; the sixth partition, the fourth partition and the cavity wall of the receiving cavity enclose a second device cavity; The first device cavity, the diversion cavity and the second device cavity are sequentially connected to form the ventilation cavity; both the first device cavity and the second device cavity are used for installing electrical components.
6. The laboratory makeup air type fume hood according to claim 5, wherein, The first partition, the fifth partition and the sixth partition are all filter plates.
7. The laboratory makeup air type fume hood according to claim 1, wherein, The laboratory makeup air type fume hood further includes a front curtain blowing device, which is arranged on the outer side wall of the cabinet body where the operation opening is provided, and is located above the observation window, and is used for blowing downward to form an air curtain.
8. The laboratory makeup air type fume hood according to claim 7, wherein The front curtain blowing device includes an air guide box and a pipeline. The air guide box is connected to the cabinet body, and the pipeline passes through the cabinet body and communicates with the air conditioner.
9. The laboratory makeup air type fume hood according to claim 1, wherein, The laboratory makeup air type fume hood further includes a filter pipe, which is communicated with the air outlet end of the exhaust fan. Along the gas flow direction, an activated carbon layer and a filter screen are sequentially arranged in the filter pipe.
10. The laboratory makeup air type fume hood according to claim 1, characterized in that, The laboratory makeup air type fume hood further includes a guide fan, which is arranged in the ventilation cavity to accelerate the air flow in the ventilation cavity.