CN114260031A - Biological safety cabinet - Google Patents
Biological safety cabinet Download PDFInfo
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- CN114260031A CN114260031A CN202011022245.6A CN202011022245A CN114260031A CN 114260031 A CN114260031 A CN 114260031A CN 202011022245 A CN202011022245 A CN 202011022245A CN 114260031 A CN114260031 A CN 114260031A
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- 238000001914 filtration Methods 0.000 claims abstract description 38
- 230000009471 action Effects 0.000 claims abstract description 14
- 238000009423 ventilation Methods 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 5
- 230000003749 cleanliness Effects 0.000 abstract description 9
- 230000000903 blocking effect Effects 0.000 description 5
- 244000052769 pathogen Species 0.000 description 3
- 230000001717 pathogenic effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010353 genetic engineering Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000003761 preservation solution Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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- Accommodation For Nursing Or Treatment Tables (AREA)
Abstract
The application discloses biological safety cabinet includes: a cabinet body having an interior cavity; the first window is arranged on the cabinet body and communicated with the inner cavity, and articles can enter and exit the inner cavity by opening the first window; the second window is arranged on the cabinet body and communicated with the inner cavity, articles can enter and exit the inner cavity by opening the second window, and the second window and the first window are arranged on different wall surfaces of the cabinet body; the air filtering system arranged on the cabinet body can enable filtered clean air to enter the inner cavity, and the filtered clean air enters the air filtering system again through the airflow channel after flowing through the inner cavity, and can prevent the external air of the cabinet body from entering the inner cavity through the opened second window under the action of negative pressure suction of the airflow channel. The biological safety cabinet has more windows for the articles to pass in and out on the premise of ensuring that the cleanliness in the cabinet is not influenced, so that the articles can pass in and out the biological safety cabinet in a plurality of different directions, and the biological safety cabinet can meet more diversified use requirements.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a biological safety cabinet with a rear window.
Background
The biological safety cabinet is a box-type air purification negative pressure safety device capable of preventing aerosol from dissipating due to dangerous or unknown biological particles in the experimental operation and treatment process, is widely applied to scientific research, teaching, clinical examination and production in the fields of microbiology, biomedicine, genetic engineering, biological products and the like, and is the most basic safety protection equipment of a primary protection barrier in laboratory biological safety.
The existing biological safety cabinet is only provided with a window for transferring articles on one side of the cabinet body, so that the use of the biological safety cabinet is limited, and more diversified use requirements cannot be met.
Disclosure of Invention
In view of this, the present application provides a biosafety cabinet having more windows for articles to enter and exit, so that the biosafety cabinet can satisfy more diversified use requirements.
In order to achieve the above purpose, the present application provides the following technical solutions:
a biosafety cabinet comprising:
a cabinet body having an interior cavity;
the first window is arranged on the cabinet body and communicated with the inner cavity, and articles can enter and exit the inner cavity by opening the first window;
the second window is arranged on the cabinet body and communicated with the inner cavity, articles can enter and exit the inner cavity by opening the second window, and the second window and the first window are arranged on different wall surfaces of the cabinet body;
the air filtering system is arranged on the cabinet body and can enable filtered clean air to enter the inner cavity and flow through the inner cavity and then enter the air filtering system again through the airflow channel, and the outside air of the cabinet body can be prevented from entering the inner cavity through the opened second window under the action of negative pressure suction of the airflow channel.
Preferably, in the biosafety cabinet, the first window is disposed on a front wall of the cabinet body, and the second window is disposed on a rear wall parallel to the front wall.
Preferably, in the biosafety cabinet, the window assembly constituting the second window includes:
the first window piece comprises a first cylindrical part and a first flange part protruding out of the outer surface of the first cylindrical part, a first through vent hole is formed in the side wall of the first cylindrical part, and the first flange part is used for being connected with the wall surface of the cabinet body;
the second window piece comprises a second cylindrical part which can be sleeved in the first cylindrical part, and a through second vent hole is formed in the side wall, sleeved with the first cylindrical part, of the second cylindrical part and communicated with the first vent hole and the airflow channel;
a filter ring provided between the first cylindrical portion and the second cylindrical portion so as to cover the first ventilation hole and/or the second ventilation hole, the filter ring filtering air flowing from the second ventilation hole to the first ventilation hole;
and the annular barrier is connected with the first window piece to block the filter ring from falling out of the space between the first cylindrical part and the second cylindrical part.
Preferably, in the biosafety cabinet, the second window is provided with a sliding door, and the sliding door slides relative to the second window to open and close the second window.
Preferably, in the biosafety cabinet, the air filtering system includes:
a fan for driving air to flow;
the airflow channel, the airflow channel includes: the head end and the tail end of the circulating air duct are communicated with the inner cavity so as to realize a circulating air duct in which air in the inner cavity circularly flows, the negative pressure value in the circulating air duct is greater than that in the inner cavity, and the first vent hole and the second vent hole are communicated with the circulating air duct; an exhaust air duct communicated with the circulating air duct to exhaust part of the air out of the cabinet body;
the first high-efficiency filter screen is arranged at an air inlet of the inner cavity;
and the second high-efficiency filter screen is arranged in the exhaust air duct.
Preferably, in the biosafety cabinet, the first vent holes are a plurality of and are uniformly distributed around the ring of the first cylindrical part; the second vent holes are multiple and are uniformly distributed around the ring shape of the second cylindrical part.
Preferably, in the biosafety cabinet, a plurality of third ventilation holes are uniformly formed around the second window in an annular shape, and the third ventilation holes are communicated with the airflow channel so as to prevent air outside the cabinet body from entering the inner cavity through the opened second window under the action of negative pressure suction of the airflow channel.
Preferably, in the biosafety cabinet, a communication channel surrounding the second window is arranged on the outer side of the annular periphery of the second window, and the communication channel is communicated with the airflow channel so as to suck air outside the cabinet body into the air filtering system under the action of negative pressure suction of the airflow channel.
Preferably, in the biosafety cabinet, the second window is a tapered opening, so that a size of an opening of the second window facing the outside of the cabinet body is smaller than a size of an opening facing the inside of the cabinet body.
The utility model provides a biosafety cabinet, not only have the first window that supplies the article business turn over, but also have the second window that supplies the article business turn over, and the second window still communicates with air filtration system's airflow channel, thereby can make airflow channel realize breathing in second window department through air filtration system, so just can inhale away from the air that the external side of cabinet got into the second window when the second window is opened, avoid the direct air that enters into the inner chamber and cause the pollution to the air in the inner chamber of unfiltered outside air, the cleanliness factor of inner chamber has been guaranteed, can guarantee the cleanliness factor in the biosafety cabinet when expanding biosafety cabinet service function again. The biological safety cabinet has more windows for the articles to pass in and out on the premise of ensuring that the cleanliness in the cabinet is not influenced, so that the articles can pass in and out the biological safety cabinet in a plurality of different directions, and the biological safety cabinet can meet more diversified use requirements.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is an isometric view of a biosafety cabinet provided in an embodiment of the present application;
FIG. 2 is a front view of the biosafety cabinet;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a cross-sectional view B-B of FIG. 3;
FIG. 5 is an exploded view of the window assembly of the second window;
FIG. 6 is an assembly view of the window assembly of the second window;
FIG. 7 is a schematic structural view of a third vent hole formed in the first window assembly;
FIG. 8 is a schematic view of a first window assembly having a communication channel formed therein;
fig. 9 is a schematic structural view of the first window assembly in which the first cylindrical portion is a cone.
In fig. 1-9:
1-cabinet body, 2-inner cavity, 3-first window, 4-second window, 5-first window piece, 6-second window piece, 7-filter ring, 8-annular blocking piece, 9-sliding door, 10-fan, 11-circulating air duct, 12-exhaust air duct, 13-first high-efficiency filter screen, 14-second high-efficiency filter screen, 15-third air vent, 16-communicating channel, 17-mechanical arm;
501-a first cylindrical portion, 502-a first flange portion, 503-a first vent hole, 601-a second cylindrical portion, 602-a second flange portion, 603-a second vent hole.
Detailed Description
The application provides a biological safety cabinet, it has more windows that supply article business turn over to make biological safety cabinet can satisfy more diversified user demand.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1-9, the embodiment of the present application provides a biosafety cabinet, which mainly includes a cabinet body 1, a first window 3, a second window 4 and an air filtering system, wherein the cabinet body 1 is a main body component of the biosafety cabinet, which encloses an inner cavity 2 of the biosafety cabinet, the inner cavity 2 is a clean room for storing articles and having negative pressure, and air in the inner cavity is filtered, the first window 3 is a sliding window which is unique to a conventional biosafety cabinet and is communicated with the inner cavity 2, articles enter and exit the clean room through the opened sliding window, the second window 4 is a structure which is added in the present application and has the same function as the first window 3, namely is also communicated with the inner cavity 2 and is used for articles to enter and exit the inner cavity 2 when opened, the shape of the second window 4 can be any shape such as a circle, an ellipse, a polygon and the like which can ensure normal entry and exit of articles, on the basis of additionally arranging the second window 4, the original air filtering system of the biosafety cabinet is correspondingly improved, specifically, an air flow channel (specifically, a circulating air channel 11 described later) of the air filtering system is communicated with the first window 3, so that the improved air filtering system can enable filtered clean air to enter the inner cavity 2 and enter the air filtering system again through the air flow channel after flowing through the inner cavity 2, and can prevent air outside the cabinet body 1 from entering the inner cavity 2 through the opened second window 4 under the action of negative pressure suction of the air flow channel, namely, the air flow channel can be used for sucking air at the second window 4 through the work of the air filtering system, so that the air entering the second window 4 from the outer side of the cabinet body 1 can be sucked away when the second window 4 is opened, and the air outside the cabinet body 1 is prevented from entering the inner cavity 2 through the opened second window 4 to influence the cleanliness of the inner cavity .
In the biological safety cabinet, the second window 4 is additionally arranged on the cabinet body 1, so that the biological safety cabinet has more passages for articles to enter and exit, and the air filtering system can suck air at the second window 4 to prevent external air from entering the inner cavity 2 through the second window 4, that is, on the premise of ensuring that the cleanliness in the cabinet is not influenced, the biological safety cabinet has more windows for articles to enter and exit, so that the articles can enter and exit the biological safety cabinet in a plurality of different directions, so that the biological safety cabinet can meet more diversified use requirements, for example, in a vehicle-mounted mobile laboratory, the second window 4 of the biological safety cabinet faces the outside of the vehicle (namely, is aligned with the window of the vehicle), the first window 3 faces the inside of the vehicle, the robot acquisition throat system (namely, the mechanical arm 17) is integrated in the biological safety cabinet, a detected person can stand outside the vehicle and is aligned with the second window 4, the mechanical arm 17 holds the throat swab to extend out of the second window 4 and collects the pathogen of the throat swab of the person to be detected outside the vehicle, and then the collected pathogen of the throat swab is placed into a specified preservation solution in the biological safety cabinet (the collection operation can also be realized by manually replacing the mechanical arm 17, namely, a person outside the vehicle can transfer the collected pathogen of the throat swab to a clean room through the second window 4).
Preferably, as shown in fig. 1 to 4, the first window 3 is provided on a front wall of the cabinet 1, and the second window 4 is provided on a rear wall parallel to the front wall. The second window 4 is preferably arranged on the rear wall opposite to the front wall where the first window 3 is arranged, so that the arrangement is more favorable for mutual isolation of a detected person and a worker, for example, the worker can work in a vehicle (namely, the space on one side of the front wall), the detected person is positioned outside the vehicle (namely, the space on one side of the rear wall), and the two persons are isolated through the interval between the biological safety cabinet and the vehicle body, so that the probability of mutual infection is reduced, and the arrangement also can enable the two persons to conveniently take and place. The second window 4 may be formed in another wall surface of the cabinet 1 depending on the actual placement position and angle of the biosafety cabinet, for example, when the biosafety cabinet is placed at a corner position of the vehicle interior space, the second window 4 may be formed in a side wall of the biosafety cabinet facing the window.
In the present application, as shown in fig. 5, in a preferred structure, the window assembly constituting the second window 4 is made to include: a first window 5, wherein the first window 5 comprises a first cylindrical part 501 and a first flange part 502 protruding the outer surface of the first cylindrical part 501, a first vent hole 503 is formed on the side wall of the first cylindrical part 501, and the first flange part 502 is used for connecting with the wall surface of the cabinet 1; a second window member 6, wherein the second window member 6 comprises a second cylindrical portion 601 (and a second flange portion 602 protruding from the outer surface of the second cylindrical portion 601) which can be fitted into the first cylindrical portion 501, and a second vent hole 603 which penetrates through a side wall of the second cylindrical portion 601 for fitting with the first cylindrical portion 501, the second vent hole 603 communicating with the first vent hole 503, and the first vent hole 503 communicating with the airflow channel; a filter ring 7 provided between the first cylindrical portion 501 and the second cylindrical portion 601 so as to cover the first ventilation hole 503 and/or the second ventilation hole 603, and air flowing from the second ventilation hole 603 to the first ventilation hole 503 is filtered by the filter ring 7; and an annular blocking member 8 connected to the first window member 5 to block the filter ring 7 from coming out from between the first cylindrical portion 501 and the second cylindrical portion 601, wherein the inner space of the first cylindrical portion 501, the second cylindrical portion 601, the filter ring 7 and the annular blocking member is a passage for the articles to enter and exit from the second window 4, and the passage may be a circular passage or a polygonal passage, that is, the first cylindrical portion 501 and the second cylindrical portion 601 may have a cylindrical structure or a square cylindrical structure as shown in fig. 5 to 9. Wherein, if the first vent 503 and the second vent 603 are not provided and are not communicated with the air flow channel of the air filtration system, the clean room (i.e. the inner cavity 2) of the biosafety cabinet is directly communicated with the external environment of the biosafety cabinet through the second window 4 when the second window 4 is opened, because the negative pressure value in the clean room is greater than the negative pressure value outside the clean room under the action of the air filtration system, external air pollutants can enter the clean room without being filtered, so that the air pollution in the clean room is easily caused, and the cleanliness of the clean room is reduced, therefore, to avoid the occurrence of the situation, the using effect of the biosafety cabinet is better ensured, on the basis of opening the second window 4, the second window 4 is further provided with the first vent 503 and the second vent 603 (the first vent 503 and the second vent 603 can also be circular holes, and the first vent 603 can be circular holes, Elliptical hole and polygonal hole, etc.) and make it communicate with the airflow channel of air filtration system, because the negative pressure value in the airflow channel is greater than the negative pressure value in clean room and the clean room outside, when opening second window 4 and gathering the work, air in the external environment can be inhaled in second ventilation hole 603 under the effect of air filtration system when getting into back second window 4, and enter into the airflow channel after passing through first ventilation hole 503, and through the filtration of air filtration system, it is indoor and outdoor to emit into biological safety cabinet clean room, just so avoided the external air that does not filter to directly enter into the clean room and influence the cleanliness factor.
And a filter ring 7 (the filter ring 7 is preferably ring-shaped filter cotton) is arranged between the first cylindrical part 501 and the second cylindrical part 601 and is made to cover the first vent hole 503 and/or the second vent hole 603 (namely, the filter ring 7 has a large enough axial size to cover the first vent hole 503 and/or the second vent hole 603), so that external pollutants can be subjected to primary filtration through the filter ring 7, and then the primarily filtered air is sucked into the air filtering system for secondary filtration through the airflow channel under the action of negative pressure and then enters the clean room of the biological safety cabinet, thereby ensuring clean air of the clean room.
Specifically, the first window member 5, the second window member 6, and the annular barrier member 8 are transparent members. These members are preferably made of a transparent material because they can facilitate the collection operation.
As shown in fig. 1 to 4, the second window 4 is preferably provided with a sliding door 9, and the sliding door 9 slides relative to the second window 4 to open and close the second window 4. The sliding door 9 capable of sliding left and right is installed on the second window 4, so that the second window 4 can be opened and closed, namely, when articles are not required to be transferred from the second window 4 or the mechanical arm 17 does not work through the second window 4, the sliding door 9 can close the second window 4, the clean room is isolated from the outside, and the pollution of the clean room caused by the outside air is prevented.
As shown in fig. 3 and 4, the air filtering system of the present application includes a fan 10 for driving air to flow, and the air flow channel includes: the head end and the tail end of the circulating air duct 11 are both communicated with the inner cavity 2, so that air in the inner cavity 2 flows circularly, the negative pressure value in the circulating air duct 11 is larger than that in the inner cavity 2, and the first vent hole 503 and the second vent hole 603 are communicated with the circulating air duct 11; an exhaust duct 12 communicating with the circulation duct 11 to discharge a part of the air; a first high efficiency filter 13 arranged at the air inlet of the inner cavity 2; and a second high efficiency filter 14 disposed within exhaust air duct 12. The air filtering system is positioned at the top of the biological safety cabinet, part of the air filtered by the air filtering system is discharged into the clean room of the biological safety cabinet, and part of the air is discharged out of the cabinet body 1 through the air outlet of the exhaust air duct 12. As shown in fig. 3, the circulating air duct 11 is separated from the clean room by a partition, so that the air in the circulating air duct 11 is not mixed with the air in the clean room, and the specific working principle is as follows: under the action of the air filtering system, a part of air in the air sent by the circulating air duct 11 passes through the second high-efficiency filter screen 14 and the filtered clean air is exhausted out of the cabinet body 1 through the air outlet, so that the environment is prevented from being polluted; the clean air that another part air obtained after filtering through first high-efficient filter screen 13 gets into the toilet, and there is the hole that communicates circulation wind channel 11 table top bottom of toilet, because the negative pressure value in circulation wind channel 11 is greater than the negative pressure value of toilet, so the air in the clean room can be inhaled circulation wind channel 11 for circulation wind channel 11 forms two independent spaces that make the air constantly circulate with the toilet, thereby guarantees the cleanliness factor of toilet. Preferably, the first high efficiency filter 13 and the second high efficiency filter 14 are HEPA.
As shown in fig. 5 to 9, the first ventilation holes 503 are preferably plural and uniformly distributed around the ring shape of the first cylindrical portion 501; the second ventilation holes 603 are plural and evenly distributed around the ring shape of the second cylindrical portion 601. So just can carry out more abundant absorption to the outside air that gets into second window 4 around the annular of second window 4 to the air in assurance clean room that can be more thorough can not receive the pollution.
In addition, as shown in fig. 7, in another preferred structure of the second window 4, a plurality of third ventilation holes 15 are uniformly arranged around the ring shape of the second window 4, and the third ventilation holes 15 are communicated with the airflow channel so as to prevent the air outside the cabinet 1 from entering the inner cavity 2 through the opened second window 4 under the action of the negative pressure suction force of the airflow channel. Specifically, in this preferred structure, the basic components constituting the second window 4 may still be the first window 5, the second window 6, the filter ring 7 and the annular blocking member 8, but different from the former preferred structure, in addition to the second window 4 having the first vent hole 503 and the second vent hole 603, a plurality of third vent holes 15 are further added, and these third vent holes 15 are specifically disposed on the first flange portion 502 and uniformly distributed around the first cylindrical portion 501, so that the first vent hole 503, the second vent hole 603 and the third vent holes 15 can all suck the outside air entering the second window 4, thereby more sufficiently preventing the outside air from entering the clean room to pollute the clean room. In another preferred structure, as shown in fig. 8, a communication channel 16 surrounding the second window 4 may be provided outside the annular periphery of the second window 4, and the communication channel 16 is communicated with the airflow channel to suck the air outside the cabinet 1 into the air filtering system under the negative pressure suction force of the airflow channel, so as to prevent the outside air from entering the inner cavity 2 through the opened second window 4. In this structure, the basic components constituting the second window 4 are still the first window 5, the second window 6, the filter ring 7 and the annular blocking member 8, and the communication channel 16 is a channel specially used for communicating the first vent hole 503 with the air flow channel (specifically, the air flow channel is the circulation air channel 11), so that the outside air entering the second window 4 can enter the air filtering system more quickly, conveniently and sufficiently under the action of the negative pressure of the air channel. Specifically, the communication passage 16 is provided at a side of the first cylindrical portion 501 located at the outer surface of the cabinet 1. Further, the communication between the first ventilation hole 503 and the circulation duct 11 may be achieved by extending the circulation duct 11.
In still another preferred structure, on the basis that the basic components constituting the second window 4 are still the first window 5, the second window 6, the filter ring 7 and the annular barrier member 8, as shown in fig. 9, the present application further makes the second window 4 a tapered mouth, that is, a passage for transferring articles (the passage is formed by the first cylindrical portion 501 and the second cylindrical portion 601) surrounded by the second window 4 a tapered cylinder, so that the size of the opening of the second window 4 toward the outside of the cabinet 1 is smaller than the size of the opening toward the inside of the cabinet 1. That is, the second window 4 is preferably designed to be in a bell mouth shape, and a circle of holes (i.e. the first ventilation hole 503 or the second ventilation hole 603) are formed around the bell mouth and are communicated with the circulating air duct 11, so that the outside air can enter the air filtering system more fully under the action of the negative pressure of the air duct, and the clean room is not polluted.
The structure of each part is described in a progressive mode in the specification, the structure of each part is mainly described to be different from the existing structure, and the whole and partial structure of the biological safety cabinet can be obtained by combining the structures of the parts.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A biosafety cabinet, comprising:
a cabinet body having an interior cavity;
the first window is arranged on the cabinet body and communicated with the inner cavity, and articles can enter and exit the inner cavity by opening the first window;
the second window is arranged on the cabinet body and communicated with the inner cavity, articles can enter and exit the inner cavity by opening the second window, and the second window and the first window are arranged on different wall surfaces of the cabinet body;
the air filtering system is arranged on the cabinet body and can enable filtered clean air to enter the inner cavity and flow through the inner cavity and then enter the air filtering system again through the airflow channel, and the outside air of the cabinet body can be prevented from entering the inner cavity through the opened second window under the action of negative pressure suction of the airflow channel.
2. The biosafety cabinet of claim 1, wherein the first window is disposed on a front wall of the cabinet body and the second window is disposed on a rear wall parallel to the front wall.
3. The biosafety cabinet of claim 1, wherein the window assembly constituting the second window comprises:
the first window piece comprises a first cylindrical part and a first flange part protruding out of the outer surface of the first cylindrical part, a first through vent hole is formed in the side wall of the first cylindrical part, and the first flange part is used for being connected with the wall surface of the cabinet body;
the second window piece comprises a second cylindrical part which can be sleeved in the first cylindrical part, and a through second vent hole is formed in the side wall, sleeved with the first cylindrical part, of the second cylindrical part and communicated with the first vent hole and the airflow channel;
a filter ring provided between the first cylindrical portion and the second cylindrical portion so as to cover the first ventilation hole and/or the second ventilation hole, the filter ring filtering air flowing from the second ventilation hole to the first ventilation hole;
and the annular barrier is connected with the first window piece to block the filter ring from falling out of the space between the first cylindrical part and the second cylindrical part.
4. The biosafety cabinet according to claim 1, wherein a sliding door is arranged on the second window, and the sliding door slides relative to the second window to open and close the second window.
5. The biosafety cabinet of claim 3, wherein the air filtration system comprises:
a fan for driving air to flow;
the airflow channel, the airflow channel includes: the head end and the tail end of the circulating air duct are communicated with the inner cavity so as to realize a circulating air duct in which air in the inner cavity circularly flows, the negative pressure value in the circulating air duct is greater than that in the inner cavity, and the first vent hole and the second vent hole are communicated with the circulating air duct; an exhaust air duct communicated with the circulating air duct to exhaust part of the air out of the cabinet body;
the first high-efficiency filter screen is arranged at an air inlet of the inner cavity;
and the second high-efficiency filter screen is arranged in the exhaust air duct.
6. The biosafety cabinet according to claim 3, wherein the first ventilation holes are a plurality of and are evenly distributed around the ring of the first cylindrical portion; the second vent holes are multiple and are uniformly distributed around the ring shape of the second cylindrical part.
7. The biosafety cabinet according to claim 1, wherein a plurality of third ventilation holes are uniformly arranged around the ring of the second window, and the third ventilation holes are communicated with the airflow channel so as to prevent air outside the cabinet body from entering the inner cavity through the opened second window under the action of negative pressure suction of the airflow channel.
8. The biosafety cabinet according to claim 1, wherein a communication channel surrounding the second window is arranged on the outer side of the annular periphery of the second window, and the communication channel is communicated with the airflow channel so as to suck air outside the cabinet body into the air filtering system under the action of negative pressure suction of the airflow channel.
9. The biosafety cabinet of claim 1, wherein the second window is tapered such that an opening of the second window toward an outside of the cabinet is smaller in size than an opening toward an inside of the cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011022245.6A CN114260031A (en) | 2020-09-25 | 2020-09-25 | Biological safety cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011022245.6A CN114260031A (en) | 2020-09-25 | 2020-09-25 | Biological safety cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN114260031A true CN114260031A (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011022245.6A Pending CN114260031A (en) | 2020-09-25 | 2020-09-25 | Biological safety cabinet |
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