CN219186948U

CN219186948U - Biological safety cabinet

Info

Publication number: CN219186948U
Application number: CN202222567811.2U
Authority: CN
Inventors: 岳刚; 刘飞飞; 关文慧; 赵逢安; 孙培元; 王艳; 张文慧; 孔维益
Original assignee: Qingdao Haier Biomedical Co Ltd
Current assignee: Qingdao Haier Biomedical Co Ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-06-16
Anticipated expiration: 2032-09-27

Abstract

The application relates to the technical field of medical equipment and discloses a biosafety cabinet which comprises a box body, a diaphragm plate, a workbench and a water receiving box, wherein the box body is provided with a containing space; the diaphragm plate is arranged in the box body to divide the accommodating space into a filtering space and an operating space, the filtering space is positioned above the operating space, and an operating window communicated with the operating space is formed in the first side surface of the box body; the workbench is transversely arranged in the operation space, the rear end of the workbench is hinged to the inner wall of the operation space, and the workbench can rotate up and down between a first angle and a second angle; the water receiving box is arranged below the workbench and is used for receiving water falling from the workbench.

Description

Biological safety cabinet

Technical Field

The present application relates to the technical field of medical devices, for example, to a biosafety cabinet.

Background

The biosafety cabinet is widely applied to the fields of medical treatment and health, disease prevention and the like, and can reduce the exposure risk of operators in the operation of infectious experimental materials such as primary cultures, bacterial strains and diagnostic specimens. The biosafety cabinet needs to keep the workbench clean during use to avoid sample contamination.

In the related art, a biosafety cabinet is disclosed, including the cabinet body, electrified motor air discharge fan, be provided with the operation chamber on the cabinet body, the high minimum chamber wall in operation chamber position is the workstation, be provided with the glass cabinet door on the cabinet body, the workstation below is provided with and connects the cistern, connect and form the waste liquid chamber between cistern and the workstation, it has a plurality of weeping holes with operation chamber and waste liquid chamber intercommunication to distribute on the workstation, connect to be connected with on the cistern and be used for the waste liquid pipe of being connected with the waste liquid bucket, waste liquid pipe and waste liquid chamber intercommunication. When the biosafety cabinet is used, an experimenter performs experiments on the workbench and above the liquid leakage hole, the experimental liquid tank is placed on the workbench, and if liquid leaks in the experiment, the experimenter only needs to wipe the liquid to the liquid leakage hole by using the rag, so that the liquid enters the liquid waste cavity, and the workbench is kept clean.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the liquid receiving groove is arranged below the workbench, after the experiment is finished, the workbench is not easy to detach to thoroughly clean the liquid receiving groove, the operation of detaching the workbench to clean the liquid receiving groove is troublesome, and operators have exposure risks.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

Embodiments of the present disclosure provide a biosafety cabinet to solve the problem of how to better clean the biosafety cabinet.

In some embodiments, the biosafety cabinet comprises a box body, a diaphragm plate, a workbench and a water receiving box, wherein the box body is configured with an accommodating space; the diaphragm plate is arranged in the box body to divide the accommodating space into a filtering space and an operating space, the filtering space is positioned above the operating space, and an operating window communicated with the operating space is formed in the first side surface of the box body; the workbench is transversely arranged in the operation space, the rear end of the workbench is hinged to the inner wall of the operation space, and the workbench can rotate up and down between a first angle and a second angle; the water receiving box is arranged below the workbench and is used for receiving water falling from the workbench.

In some embodiments, the biosafety cabinet further comprises a stop portion disposed in the operation space, and the workbench is overlapped with an upper surface of the stop portion when rotated to the first angle.

In some embodiments, the water receiving box comprises a water receiving box side frame and a water receiving box bottom plate, wherein the water receiving box side frame and the workbench are positioned at a first angle, and the bottom of the workbench is lapped on the upper surface of the water receiving box side frame; the bottom plate of the water receiving box is enclosed with the side frames to form a water storage space.

In some embodiments, the biosafety cabinet further comprises a gas spring, a first end is rotatably connected to the table, a second end is rotatably connected to an inner wall of the water receiving box, and the gas spring is compressed when the table is rotated downward to a first angle.

In some embodiments, the biosafety cabinet further comprises a first mounting assembly and a second mounting assembly, wherein the first mounting assembly extends downward from a lower surface of the table, the first mounting assembly is provided with a first mounting hole; the second installation component extends upwards from the water receiving box bottom plate, and a second installation hole is formed in the second installation component; the first end of the gas spring is provided with a first rotating shaft, the first rotating shaft is rotatably arranged in the first mounting hole, the second end of the gas spring is provided with a second rotating shaft, and the second rotating shaft is rotatably arranged in the second mounting hole.

In some embodiments, the number of the gas springs is two, and the two gas springs are respectively connected to two sides of the workbench.

In some embodiments, the biosafety cabinet further comprises a spring hinge by which the table is hinged to an inner wall of the operating space, the spring hinge providing a force to rotate the table upward.

In some embodiments, the biosafety cabinet further comprises a damping hinge, one end of the damping hinge is connected to the workbench, the other end of the damping hinge is connected to the inner wall of the operation space, and the workbench is hinged to the inner wall of the operation space through the damping hinge.

In some embodiments, the biosafety cabinet further comprises a first locking member and a second locking member, wherein the first locking member is disposed on the table; the second locking piece is fixed on the box body and matched with the first locking piece to lock the workbench at a first angle.

In some embodiments, the biosafety cabinet further comprises a securing element disposed in the operating space for securing the table at a second angle.

The biosafety cabinet provided by the embodiment of the disclosure can realize the following technical effects:

1. the workbench is rotatably arranged, so that an operator can conveniently clean the water receiving box below the workbench;

2. when liquid is leaked from the surface of the workbench, the workbench can be turned upwards, so that the liquid can flow to the water receiving box along the inclined slope more easily;

3. when the workbench is scoured, the dead angle can be reduced by overturning the workbench, and scour water can better flow downwards along the inclined slope of the workbench, so that splashing is not easy to occur; the workbench rotates upwards to a second angle, and the lower surface of the workbench can be washed.

By using the biosafety cabinet provided by the embodiment of the disclosure, the workbench and the water collecting box below the workbench can be cleaned more conveniently, the biosafety cabinet is cleaned more cleanly, the cleaning difficulty of the biosafety cabinet is reduced, and the biosafety cabinet is convenient for users to use.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic illustration of the structure of a biosafety cabinet provided in an embodiment of the disclosure;

FIG. 2 is a schematic structural view of another biosafety cabinet provided by an embodiment of the disclosure;

FIG. 3 is a schematic cross-sectional view of a biosafety cabinet provided in an embodiment of the disclosure;

fig. 4 is a schematic view of a portion of a biosafety cabinet according to an embodiment of the disclosure.

Reference numerals:

100: a case; 110: a diaphragm; 120: a filtering space; 130: an operation space; 200: a work table; 300: a water receiving box; 310: a water receiving box side frame; 320: a water receiving box bottom plate; 330: a gas spring; 340: a first mounting assembly; 350: a second mounting assembly; 360: a spring hinge.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

Referring to fig. 1 to 4, the disclosed embodiment provides a biosafety cabinet, including a case 100, a diaphragm 110, a table 200, and a water receiving box 300, wherein the case 100 is configured with a receiving space; the diaphragm plate 110 is arranged in the box body 100 to divide the accommodating space into a filtering space 120 and an operating space 130, the filtering space 120 is positioned above the operating space 130, and an operating window communicated with the operating space 130 is formed in the first side surface of the box body 100; the workbench 200 is transversely arranged in the operation space 130, the rear end of the workbench is hinged to the inner wall of the operation space 130, and the workbench 200 can rotate up and down between a first angle and a second angle; the water receiving box 300 is disposed below the table 200 for receiving water falling from the table 200.

In the disclosed embodiment, the case 100 of the biosafety cabinet includes a top plate, a bottom plate, and side plates. The top plate, the bottom plate and the side plates enclose to define a containing space. The side plates comprise a front side plate, a left side edge, a right side plate and a back plate. The biosafety cabinet further includes a diaphragm 110, and the diaphragm 110 divides the receiving space into a filtering space 120 and an operating space 130. The filter space 120 is located above the operation space 130. The front side plate is provided with an operation window corresponding to the operation space 130, so that an operator can conveniently extend hands into the operation space 130 to perform experiments. The workbench 200 is disposed in the operation space 130, and the water receiving box 300 is disposed below the workbench 200. The operator performs experiments by placing experimental equipment such as an experimental object and a test tube above the workbench 200. The waste liquid leaking to the workbench 200 during the experiment flows into the water receiving box 300 below.

The end of the workbench 200 close to the back plate of the case 100 is a rear end, and the rear end is hinged to the inner wall of the operation space 130, that is, to the back plate of the case 100. The rotation axis is disposed laterally, and the table 200 can be rotated up and down between a first angle and a second angle around the rotation axis. The table 200 is at a first angle in the working state and at a second angle in the cleaning state. An operator may hold the front end of the table 200 upside down while washing the biosafety cabinet. After the table 200 is turned up, the water receiving box 300 under the table 200 can be fully displayed, thereby facilitating the cleaning thereof by the operator. The cleaning mode may be water washing or wiping with a rag, and the cleaning mode is not particularly limited. Regardless of the type of cleaning, the water receiving cartridge 300 may be more conveniently cleaned while the water receiving cartridge 300 may be more cleanly cleaned in a case where the inside of the water receiving cartridge 300 may be sufficiently observed. In addition, when liquid is leaked on the surface of the workbench 200, the workbench 200 can be turned upwards, so that the liquid leaked on the surface of the workbench 200 can flow downwards to the water receiving box 300. When the table 200 is washed, washing water can flow to the water receiving box 300 better along the inclined slope of the table 200, and splashing is not easy.

The workbench 200 is rotatably arranged, so that an operator can conveniently clean the water receiving box 300 below the workbench 200; when liquid is leaked on the surface of the workbench 200, the workbench 200 can be turned upwards, so that the liquid can flow to the water receiving box 300 along the inclined slope more easily; when the workbench 200 is washed, dead angles can be reduced by overturning the workbench 200, washing water can better flow downwards along the inclined slope of the workbench 200, and splashing is not easy to generate; the table 200 is rotated upward to a second angle so that the lower surface of the table 200 can be rinsed as well. By using the biosafety cabinet provided by the embodiment of the disclosure, the workbench 200 and the water collecting box below the workbench 200 can be cleaned more conveniently, and the biosafety cabinet is cleaned more cleanly, so that the cleaning difficulty of the biosafety cabinet is reduced, and the biosafety cabinet is convenient for users to use.

Optionally, the workbench 200 is provided with a drain hole, and the drain hole is located right above the water receiving box 300.

The drain holes are provided to facilitate the controlled inflow of water spilled on the table 200 into the water receiving box 300, and to improve the cleanliness of the inside of the operation space 130.

Optionally, the number of the drain holes is a plurality, and the plurality of drain holes are arranged at intervals.

The plurality of drain holes are arranged at intervals, so that the drain effect of the workbench 200 can be further improved, and the experiment is continuously carried out without being influenced by waste liquid.

Optionally, the biosafety cabinet further includes a stopper disposed in the operation space 130, and overlapping an upper surface of the stopper when the table 200 is rotated to the first angle.

The stop is used to provide the table 200 with a defined initial position. When the table 200 rotates upward, the lower surface is out of contact with the stopper and the distance between the lower surface and the stopper increases gradually, and when the table 200 rotates downward to the first angle, the lower surface abuts against the upper surface of the stopper. The stop portion is provided to make the table 200 more stable at the first angle, thereby ensuring that experiments on the table 200 can be smoothly performed.

Optionally, a stop extends inwardly from a side panel of the case 100.

Thus, the stop is located below the table 200 and at the side. The stopper is fixed to a side plate of the case 100, and the side plate of the case 100 provides a bearing force in a height direction thereof. Thus, the structure is stable, the support for the workbench 200 can be realized without additional auxiliary fixing parts, and the structure is simple and the cost is lower. The stopping part is located at the side, and is not easy to interfere with the cleaning action when cleaning the lower surface of the water receiving box 300 or the working table 200, thereby facilitating the use of the user.

Alternatively, the stoppers are symmetrically disposed at the left and right side plates of the case 100.

With such arrangement, the supporting force of the stopper to the table 200 is relatively uniform, and the structure is relatively stable.

Optionally, the water receiving box 300 includes a water receiving box side frame 310 and a water receiving box bottom plate 320, wherein the bottom of the water receiving box side frame 310 is overlapped with the upper surface of the water receiving box side frame 310 when the workbench 200 is positioned at the first angle; the bottom plate 320 of the water receiving box forms a water storage space with the side frames.

The water receiving box side frame 310 and the water receiving box bottom plate 320 enclose a water storage space together, and water falling from the workbench 200 enters the water storage space. The side frames of the water receiving case 300 serve as stoppers, and can uniformly provide a supporting force to maintain the table 200 at the first angle. The side frame 310 of the water receiving box is used as a supporting part, and the workbench 200 covers the opening at the top of the water receiving box 300 at a first angle, so that the waste liquid in the water receiving box 300 can be prevented from splashing. By adopting the setting mode, the side frame of the water receiving box 300 is used as a stop part, so that the structure of the biosafety cabinet can be simplified, and the cost of the biosafety cabinet can be reduced; in addition, the workbench 200 is matched with the water receiving box 300, so that waste liquid in the water receiving box 300 can be placed to splash, the operation space 130 can be kept clean in the experimental process, and the smooth performance of the experiment is ensured.

Optionally, the biosafety cabinet further includes a gas spring 330, a first end of which is rotatably connected to the table 200 and a second end of which is rotatably connected to an inner wall of the water receiving box 300, and the gas spring 330 is compressed when the table 200 is rotated downward to a first angle.

The gas spring 330 is used to assist the table 200 in turning upward. The two ends of the gas spring 330 are rotatably connected to the inner walls of the table 200 and the water receiving box 300, respectively. When the workbench 200 is forced to rotate downwards, the gas spring 330 is compressed; when the external force applied to the table 200 is removed, the gas spring 330 provides a resilient force, so that the table 200 tends to turn upwards. A gas spring 330 is provided to require a small force to rotate the table 200 upward when the table 200 is turned upward. With such arrangement, the difficulty in opening the table 200 in a narrow space is avoided, and the use by a user is further facilitated.

Optionally, the biosafety cabinet further includes a first mounting assembly 340 and a second mounting assembly 350, wherein the first mounting assembly 340 extends downward from a lower surface of the table 200, and the first mounting assembly 340 is provided with a first mounting hole; a second mounting assembly 350 extending upward from the water receiving box bottom plate 320, the second mounting assembly 350 having a second mounting hole; the first end of the gas spring 330 is provided with a first rotation shaft rotatably disposed in the first mounting hole, and the second end of the gas spring 330 is provided with a second rotation shaft rotatably disposed in the second mounting hole.

The first mounting assembly 340 is fixed to the lower surface of the table 200, and the first mounting assembly 340 is provided with a first mounting hole, and an axis of the first mounting hole is parallel to an axis of the rotation shaft of the table 200. The second mounting assembly 350 extends upwardly from the water receiving box bottom plate 320, and the second mounting assembly 350 defines a second mounting hole having an axis parallel to the axis of the first mounting hole. The first end of the gas spring 330 is provided with a first rotation shaft, and the second end of the gas spring 330 is provided with a second rotation shaft. The first rotation shaft of the first end of the gas spring 330 is disposed in the first mounting hole, and the second rotation shaft of the second end of the gas spring 330 is disposed in the second mounting hole. When the table 200 is rotated from the first angle to the second angle, the distance between the first mounting hole and the second mounting hole increases, and the gas spring 330 releases the stored mechanical energy and expands; when the table 200 is rotated from the second angle to the first angle, the distance between the first mounting hole and the second mounting hole is reduced, and the gas spring 330 is compressed and stores a portion of mechanical energy. With this arrangement, when the table 200 is at the first angle, the gas spring 330 is located below the table 200, and the upper surface of the table 200 is relatively clean. The first and second mounting

assemblies

340 and 350 are provided, and the operation of the gas spring 330 is more stably controlled.

Alternatively, the number of the gas springs 330 is two, and the two gas springs 330 are respectively connected to both sides of the table 200.

A gas spring 330 is provided at both sides of the table 200, respectively, and the force applied by the gas spring 330 to the table 200 can be more uniform. With such an arrangement, the table 200 can be turned over more easily and reliably.

Optionally, the biosafety cabinet further includes a spring hinge 360, the table 200 is hinged to an inner wall of the operation space 130 by the spring hinge 360, and the spring hinge 360 provides a force to rotate the table 200 upward.

Spring hinge 360 stores mechanical energy when table 200 is rotated from the second angle to the first angle. When the table 200 is rotated from the first angle to the second angle, the spring hinge 360 releases the stored mechanical energy, thereby providing a force to rotate the table 200 upward. The spring hinge 360 is arranged, so that the work table 200 can be rotated upwards more labor-saving, and the use of a user is facilitated.

Optionally, the biosafety cabinet further includes a damping hinge, one end of which is connected to the table 200, and the other end of which is connected to the inner wall of the operation space 130, and the table 200 is hinged to the inner wall of the operation space 130 through the damping hinge.

The workbench 200 is connected to the inner wall of the operation space 130 through a damping hinge, and when the workbench 200 rotates to any angle, the damping hinge can provide a certain rotation resistance, so that the workbench 200 is stopped at a preset angle. During cleaning of the table 200 and the water receiving box 300, it is sometimes necessary to rotate the table 200 to a certain angle. Holding the table 200 at this angle can be inconvenient for cleaning operations. The damping hinge is arranged, so that the workbench 200 can be stopped at a preset angle, and the hands of an operator are liberated. With such an arrangement, the operator can further conveniently clean the table 200 and the water receiving box 300.

Optionally, the biosafety cabinet further includes a first locking member and a second locking member, wherein the first locking member is disposed on the workbench 200; the second locking member is fixed to the case 100, and cooperates with the first locking member to lock the table 200 at the first angle.

The first locking piece and the second locking piece work in a matched mode in pairs. The first locking member is disposed on the table 200, and the second locking member is fixed to the case 100. The first locking member and the second locking member can be controlled to switch between a locking state and an unlocking state. When experiments are performed in the operation space 130, the workbench 200 is locked at the first angle through the first locking member and the second locking member, so that the accidental rotation of the workbench 200 is avoided to influence the performance of the experiments. When cleaning the work table 200 and the water receiving box 300, the work table 200 is turned upward by contacting the locking of the first locking member and the second locking member to clean the work table 200 and the water receiving box 300. The first locking piece and the second locking piece are arranged, so that the safety of using the biosafety cabinet can be improved.

Optionally, the biosafety cabinet further includes a fixing member disposed in the operation space 130 for fixing the table 200 at the second angle.

The fixing piece is arranged to fix the workbench 200 at the second angle, so that the danger caused by accidental downward overturning of the workbench 200 can be effectively prevented.

Optionally, the fixing member includes a hook and a hanging buckle, where the hook and the hanging buckle are respectively fixed on the inner walls of the working table 200 and the operation space 130, and the hanging buckle cooperate to fix the working table 200 at the second angle.

By adopting the fixing mode, the structure is simple and the use is convenient.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A biosafety cabinet comprising:

the box body is provided with an accommodating space;

the diaphragm plate is arranged in the box body to divide the accommodating space into a filtering space and an operating space, the filtering space is positioned above the operating space, and an operating window communicated with the operating space is formed in the first side surface of the box body;

the workbench is transversely arranged in the operation space, the rear end of the workbench is hinged to the inner wall of the operation space, and the workbench can rotate up and down between a first angle and a second angle;

the water receiving box is arranged below the workbench and is used for receiving water falling from the workbench.

2. The biosafety cabinet of claim 1, further comprising:

the stop part is arranged in the operation space, and the workbench is lapped on the upper surface of the stop part when rotating to the first angle.

3. The biosafety cabinet of claim 1 wherein said water receiving box comprises:

the workbench is positioned at a first angle, and the bottom of the workbench is lapped on the upper surface of the water receiving box side frame;

the bottom plate of the water receiving box is enclosed with the side frames to form a water storage space.

4. A biosafety cabinet according to claim 3, further comprising:

and the first end of the air spring is rotationally connected with the workbench, the second end of the air spring is rotationally connected with the inner wall of the water receiving box, and the air spring is compressed when the workbench rotates downwards to a first angle.

5. The biosafety cabinet of claim 4 further comprising:

the first mounting assembly extends downwards from the lower surface of the workbench, and a first mounting hole is formed in the first mounting assembly;

the second installation component extends upwards from the water receiving box bottom plate, and a second installation hole is formed in the second installation component;

the first end of the gas spring is provided with a first rotating shaft, the first rotating shaft is rotatably arranged in the first mounting hole, the second end of the gas spring is provided with a second rotating shaft, and the second rotating shaft is rotatably arranged in the second mounting hole.

6. The biosafety cabinet of claim 4 wherein the cabinet is configured to receive a signal from a user,

the number of the gas springs is two, and the two gas springs are respectively connected to two sides of the workbench.

7. The biosafety cabinet of claim 1, further comprising:

and the spring hinge is hinged to the inner wall of the operation space, and provides force for enabling the workbench to rotate upwards.

8. The biosafety cabinet of claim 1, further comprising:

damping hinge, one end connect in the workstation, the other end connect in the inner wall of operating space, the workstation pass through damping hinge articulated in the inner wall of operating space.

9. The biosafety cabinet of any of claims 1-8, further comprising:

the first locking piece is arranged on the workbench;

the second locking piece is fixed on the box body and matched with the first locking piece to lock the workbench at a first angle.

10. The biosafety cabinet of claim 9, further comprising:

the fixing piece is arranged in the operation space and used for fixing the workbench at a second angle.