CN218379800U - A purify subassembly and biohazard safety equipment for biohazard safety equipment - Google Patents

Abstract

The application relates to the technical field of biological safety cabinets and discloses a purification assembly for a biological safety cabinet, which comprises: the shell is provided with a first opening and a second opening; the first filter is arranged at the upper end of the shell and corresponds to the first opening; the second filter is arranged at the lower end of the shell and corresponds to the second opening; the casing first filter with the second filter encloses jointly and closes out the casing, the second filter the casing with first filter from the bottom up compresses tightly the installation setting in proper order to reduce the installation and purify the installation time of subassembly. This application is through compressing tightly the installation setting with first filter, casing and second filter from the bottom up in proper order, compares in the mode that sets up air inlet system and air-out system respectively, can promote the installation effectiveness who purifies the subassembly, and convenient to use user dismantles and purifies the subassembly, changes first filter and second filter. The application also discloses a biosafety cabinet.

Description

A purify subassembly and biological safety cabinet for biological safety cabinet

Technical Field

The application relates to the technical field of biological safety cabinets, for example to a purification assembly for a biological safety cabinet and the biological safety cabinet.

Background

Biological Safety Cabinets (BSCs), also known as Biological or microbiological Safety cabinets, are microbiological tests with infectivity in operation or in testing, designed to protect personnel, laboratory environment and samples of the external natural environment, experiments, from exposure to aerosols and spilled substances that may be produced during the above operations, a completely enclosed ventilated laboratory working space designed for safe handling of contaminated (or potentially contaminated) pathogens requiring materials with a determined level of biosafety. There are several different types of biosafety cabinets (i.e. class I, II or III) which are distinguished from each other by the degree of biological protection required. The main purpose of the biosafety cabinet is to serve as a primary means of protecting laboratory workers and the surrounding environment from pathogens.

Disclosed in the related art is a biosafety cabinet including: the front side of the cabinet body is provided with a front opening; the front door mechanism is arranged at the front opening and comprises an upper door cover, and the upper door cover is arranged at the upper part of the front opening and is detachably connected with the cabinet body; the air exhaust mechanism is arranged at the top in the cabinet body; the working box body is arranged in the cabinet body, and the front side and the top of the working box body are both opened; the air inlet high-efficiency filter is suitable for being arranged at the top of the working box body; the air inlet box body is provided with an opening at the bottom and is provided with an air inlet fan, the air inlet box body is suitable for being hinged with the cabinet body through a second connecting mechanism, the bottom of the air inlet box body is abutted against or separated from the top of the air inlet high-efficiency filter by rotating the air inlet box body, the second connecting mechanism is detachably connected with the cabinet body, and the air inlet box body and the air inlet high-efficiency filter are suitable for being taken out from the upper part of the front opening; and the fixing clip is suitable for pressing and sealing the bottom of the air inlet box body and the top of the air inlet high-efficiency filter.

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 biosafety cabinet in the correlation technique needs to install the air inlet box body, the air inlet high-efficiency filter and the exhaust mechanism respectively to complete the air purification in the biosafety cabinet, the installation of the purification component is more complicated, and a large amount of time needs to be consumed when the whole assembly is carried out.

SUMMERY OF THE UTILITY MODEL

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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a purification assembly for a biological safety cabinet and the biological safety cabinet, which aim to solve the problem that the installation time is long due to the complex installation of the purification assembly of the biological safety cabinet.

Embodiments of a first aspect of the present application provide a decontamination assembly for a bio-safety cabinet, the decontamination assembly for a bio-safety cabinet comprising: the shell is provided with a first opening and a second opening; the first filter is arranged at the upper end of the shell and corresponds to the first opening; the second filter is arranged at the lower end of the shell and corresponds to the second opening; the casing first filter with the second filter encloses jointly and closes out the casing, the second filter the casing with first filter from the bottom up compresses tightly the installation setting in proper order to reduce the installation and purify the installation time of subassembly.

In some optional embodiments, the decontamination assembly for a biosafety cabinet further comprises: and the elastic pressing block is arranged at the edges of the upper end and the lower end of the first filter and the second filter so as to press and install the first filter and the second filter.

In some optional embodiments, a flange is provided at an edge of the second opening, and the flange extends toward the inside of the housing, so that the second opening can press the elastic pressing block of the second filter.

In some optional embodiments, the decontamination module for a biosafety cabinet further comprises: the base is arranged below the second filter and used for supporting and fixing the second filter; the pressing piece is vertically arranged on one side of the second filter, one end of the pressing piece is connected with the shell, the other end of the pressing piece extends to the upper portion of the base and is connected with the base, a gap exists between the other end of the pressing piece and the top surface of the base, and the gap between the other end of the pressing piece and the top surface of the base is reduced by screwing bolts and nuts so as to press the shell and the second filter.

In some optional embodiments, the decontamination module for a biosafety cabinet further comprises: the compressing block is arranged at the top end of the first filter and corresponds to the elastic compressing block of the first filter, and the compressing block is suitable for being arranged on the top wall of the biological safety cabinet so as to compress the first filter and the shell by fastening the top wall of the biological safety cabinet.

In some optional embodiments, the decontamination assembly for a biosafety cabinet further comprises: the positioning block is arranged on the upper end face of the shell and surrounds the first opening, so that the first filter and the first opening can be quickly positioned.

In some optional embodiments, the decontamination module for a biosafety cabinet further comprises: the fan is arranged in the shell, and an air outlet of the fan penetrates through the side wall of the shell, so that air outside the shell flows into the shell under the driving of the fan and flows out of the shell from the first opening and the second opening.

In some alternative embodiments, the air flow area of the first opening is smaller than the air flow area of the second opening.

Embodiments of a second aspect of the present application provide a biosafety cabinet comprising: a cabinet body; a decontamination module for a biosafety cabinet as claimed in any one of the above alternative embodiments, disposed within the cabinet body.

In some optional embodiments, the biosafety cabinet further comprises: the first fixing piece is arranged on the rear side of the shell; the second fixing piece is arranged on the cabinet body and corresponds to the first fixing piece, and a groove is formed in the second fixing piece; the first fixing piece is provided with a rotating shaft, and the rotating shaft is matched with the groove, so that the first fixing piece is connected with the second fixing piece and can rotate relative to the second fixing piece.

The purification component for the biological safety cabinet and the biological safety cabinet provided by the embodiment of the disclosure can realize the following technical effects:

the first filter, the shell and the second filter are sequentially pressed and installed from bottom to top, the sealing requirement of the purification assembly can be met by pressing and installing, and air in the shell is effectively prevented from flowing out from a gap between the first filter and the shell and/or a gap between the second filter and the shell; in addition, compared with the arrangement mode of respectively arranging the air inlet system and the air outlet system, the installation efficiency of the purification assembly can be improved, and a user can conveniently detach the purification assembly and replace the first filter and the second filter; the installation space required by the purification component can be effectively reduced, and the volume of the biological safety cabinet can be further reduced, so that the biological safety cabinet is more miniaturized.

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 in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic diagram of a decontamination module for a biosafety cabinet according to an embodiment of the disclosure;

FIG. 2 is a schematic cross-sectional view of a decontamination module for a biosafety cabinet according to an embodiment of the disclosure;

FIG. 3 is an exploded schematic view of a decontamination module for a biosafety cabinet from one perspective provided by an embodiment of the disclosure;

FIG. 4 is an exploded schematic view of a decontamination module for a biosafety cabinet from another perspective provided by embodiments of the present disclosure;

FIG. 5 is a schematic cross-sectional view of a biosafety cabinet according to an embodiment of the disclosure;

FIG. 6 is a schematic diagram illustrating a partial structure of a biosafety cabinet according to an embodiment of the disclosure;

fig. 7 is an enlarged schematic view of a portion a in fig. 6 provided in an embodiment of the present disclosure.

Reference numerals:

10: a housing, 101: first opening, 102: second opening, 1021: flanging and 103: third opening, 11: base, 20: first filter, 30: second filter, 40: elastic pressing block, 50: pressing member, 60: compact block, 70: positioning block, 80: fan, 81: fastener, 90: cabinet body, 91: first fixing member, 911: rotating shaft, 92: second mounting, 921: groove 922: and avoiding the space.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. 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 be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can 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. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

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

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. E.g., a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

With reference to fig. 1-7, embodiments of the present disclosure provide a decontamination module for a biosafety cabinet, comprising: the filter comprises a shell 10, a first filter 20 and a second filter 30, wherein the shell 10 is provided with a first opening 101 and a second opening 102, and the first opening 101 and the second opening 102 are oppositely arranged; the first filter 20 is disposed above the housing 10 and corresponding to the first opening 101; the second filter 30 is disposed below the housing 10 and corresponding to the second opening 102; casing 10, first filter 20 and second filter 30 enclose jointly and close out casing 10, and second filter 30, casing 10 and first filter 20 compress tightly the installation setting from the bottom up in proper order to reduce the installation and purify the required installation time of subassembly.

By adopting the purification assembly for the biosafety cabinet, which is provided by the embodiment of the disclosure, the second filter 30, the shell 10 and the first filter 20 are sequentially pressed and installed from bottom to top, the sealing requirement of the purification assembly can be met by pressing and installing, and air in the shell 10 can be effectively prevented from flowing out from gaps between the first filter 20 and the shell 10 and/or between the second filter 30 and the shell 10; the installation space required by the purification component can be effectively reduced, and the volume of the biological safety cabinet can be further reduced, so that the biological safety cabinet is more miniaturized.

Optionally, the first filter 20 and/or the second filter 30 may be a high efficiency air filter, and may also be an ultra high efficiency air filter.

Illustratively, the first filter 20 and the second filter 30 are both high-efficiency air filters, the high-efficiency air filters adopt special fireproof materials as frames, the frames are divided into grid shapes by corrugated aluminum sheets, and emulsified glass fiber submicron particles are filled in the grid shapes, so that the filtering efficiency of the high-efficiency air filters can reach 99.99% -100%.

In this way, it can be ensured that the cleanliness of the air filtered by the first filter 20 or the second filter 30 meets the air flow cleanliness standard of the biosafety cabinet.

In some optional embodiments, the decontamination assembly for a biosafety cabinet further comprises: and the elastic pressing blocks 40 are arranged at the edges of the upper end and the lower end of the first filter 20 and the second filter 30, so that the first filter 20 and the second filter 30 can be installed in a pressing mode.

By adopting the purification assembly for the biosafety cabinet provided by the embodiment of the disclosure, through the arrangement of the elastic pressing block 40, when the second filter 30 is pressed and installed at the second opening 102, the elastic pressing block 40 at the upper end of the second filter 30 is pressed by the housing 10, the elastic pressing block 40 of the second filter 30 can fill the gap between the second filter 30 and the housing 10, so that the connection tightness of the second filter 30 can be ensured, and air is prevented from flowing out of the housing 10 without being purified, similarly, when the first filter 20 is pressed and installed at the first opening 101, the elastic pressing block 40 at the lower end of the first filter 20 is pressed by the housing 10, the elastic pressing block 40 of the first filter 20 can fill the gap between the first filter 20 and the housing 10, so that the connection tightness of the first filter 20 can be ensured, and air is prevented from flowing out of the housing 10 without being purified.

Alternatively, the elastic pressing block 40 may be pressing cotton, and may be foamed plastic.

In some alternative embodiments, a flange 1021 is provided at the edge of the second opening 102, and the flange 1021 is provided extending inward of the housing 10, so that the second opening 102 can compress the elastic compression block 40 of the second filter 30.

By adopting the purification assembly for the biosafety cabinet provided by the embodiment of the disclosure, the flanging 1021 is arranged at the second opening 102, so that the connection stability of the second filter 30 and the shell 10 can be ensured, the elastic pressing block 40 is pressed on the flanging 1021 to ensure the sealing property between the second filter 30 and the shell 10, and the air flow can be effectively prevented from flowing out from between the second filter 30 and the shell 10.

In some optional embodiments, the decontamination module for a biosafety cabinet further comprises: the base 11 is arranged below the second filter 30, and the base 11 is used for supporting and fixing the second filter 30; the pressing piece 50 is vertically arranged on one side of the second filter 30, one end of the pressing piece 50 is connected with the shell 10, the other end of the pressing piece 50 extends to the upper side of the base 11 and is connected with the base 11, a gap exists between the other end of the pressing piece 50 and the top surface of the base 11, and the gap between the other end of the pressing piece 50 and the top surface of the base 11 is reduced by screwing bolts and nuts so as to press the shell 10 and the second filter 30.

By adopting the purification assembly for the biosafety cabinet provided by the embodiment of the disclosure, as shown in fig. 1 to 4, by arranging the base 11, the second filter 30 can be fixed on the base 11, by arranging the pressing piece 50, one end of the pressing piece 50 is connected with the shell 10, the other end of the pressing piece 50 is connected with the base 11, a certain gap exists between the plane where the other end of the pressing piece 50 is located and the top surface of the base 11, and the pressing degree of the shell 10 and the second filter 30 can be changed by changing the size of the gap between the two. In addition, the pressing member 50 may fix the position of the housing 10 to prevent the housing 10 from being displaced with respect to the second filter 30.

Optionally, a vertical upward hem is provided at the edge of the top end of the base 11 to fix the second filter 30. Like this, through setting up the hem, the hem encloses the space of closing out and the bottom looks adaptation of second filter 30, that is to say, the bottom of second filter 30 can just place in the hem and enclose the space of closing out, can prevent through setting up the hem that second filter 30 from taking place the displacement for base 11, guarantees that base 11 and second filter 30's connection is stable.

Alternatively, the pressing member 50 may be provided in plural numbers, and may be uniformly arranged along the circumferential direction of the housing 10, so as to press the housing 10 and the second filter 30 from plural directions. In this way, by disposing the plurality of pressing members 50 at the outer side of the housing 10 at regular intervals, all directions of the housing 10 can be pressed against the second filter 30, and the sealing of the joint of the housing 10 and the second filter 30 can be sufficiently ensured.

In some optional embodiments, the decontamination assembly for a biosafety cabinet further comprises: and the pressing block is arranged at the top end of the first filter 20 and is arranged corresponding to the elastic pressing block 40 of the first filter 20, and the pressing block is suitable for being arranged on the top wall of the biological safety cabinet so as to press the first filter 20 and the shell 10 by fastening the top wall of the biological safety cabinet.

By adopting the purification assembly for the biosafety cabinet, provided by the embodiment of the disclosure, the pressure is applied to the first filter 20 from the upper part by arranging the compression block, so that the connection between the first filter 20 and the shell 10 is tighter, the gas in the shell 10 is prevented from flowing out from the gap between the first filter 20 and the shell 10, and the connection tightness between the shell 10 and the first filter 20 is ensured.

In some optional embodiments, the decontamination assembly for a biosafety cabinet further comprises: the positioning block 70 is disposed on the upper end surface of the housing 10 and surrounds the first opening 101, so that the first filter 20 and the first opening 101 can be quickly positioned.

Adopt the purification component for biosafety cabinet that this disclosed embodiment provided, through setting up locating piece 70, locating piece 70 is located the top of casing 10 and is located first opening 101 all around, the breach that locating piece 70 formed is with the bottom size looks adaptation of first filter 20, so that the bottom of first filter 20 can be located the breach, locating piece 70 is injectd all around the bottom of first filter 20, prevent that first filter 20 from taking place to shift in use or the installation, the condition that leads to the air in the casing 10 to reveal from first opening 101 takes place.

In some optional embodiments, the decontamination assembly for a biosafety cabinet further comprises: the fan 80 is disposed in the casing 10, and an air inlet of the fan 80 is communicated with the outside of the casing 10, so that air outside the casing 10 flows into the casing 10 and flows out of the casing 10 from the first opening 101 and the second opening 102 under the driving of the fan 80.

By adopting the purification assembly for the biosafety cabinet provided by the embodiment of the disclosure, through the arrangement of the fan 80, the fan 80 can drive outside air to flow into the housing 10, and can provide flowing power for the air in the housing 10, so that under the driving of the fan 80, a part of the air in the housing 10 flows out of the housing 10 from the first filter 20, and the other part of the air flows out of the housing 10 from the second filter 30. In addition, with the setting of traditional double fan 80 system, this application only need set up a fan 80 and can satisfy the requirement that purifies the subassembly, can reduce the system complexity that purifies the subassembly effectively, can also reduce the cost that purifies the subassembly.

Optionally, a third opening 103 is formed in a rear side wall of the housing 10, the third opening 103 is adapted to an air inlet of the blower 80, and the air inlet of the blower 80 is communicated with the outside air through the third opening 103.

Optionally, the fan 80 is a volute-less centrifugal fan 80, and the volute-less centrifugal fan 80 is disposed on the rear side wall of the housing 10.

Like this, through setting up no spiral case centrifugal fan, compare in adopting spiral case formula centrifugal fan, the noise that produces when can reducing the fan rotation effectively, because no spiral case centrifugal fan's air-out side does not have blockking of spiral case in addition, and no spiral case centrifugal fan air-out side can the even air-out, and then promotes the homogeneity of the air current that casing 10 flows.

Optionally, the decontamination assembly for a biosafety cabinet further comprises: and the fastening part 81 is arranged corresponding to the fan 80 and connected with the rear side wall of the shell 10 to strengthen the connection between the fan and the shell 10.

Referring to fig. 3, the fastening member 81 includes a first folded edge, a second folded edge and a third folded edge, two ends of the second folded edge are respectively connected to one end of the first folded edge and one end of the third folded edge, the other end of the first folded edge and the other end of the third folded edge are both connected to the rear side wall of the housing 10, the second folded edge is connected to the air outlet side of the fan 80, and the connection between the fan 80 and the housing 10 is strengthened.

Thus, by arranging the fastening piece 81, the connection between the fan 80 and the housing 10 can be strengthened, and the condition that the fan 80 vibrates excessively or the fan 80 cannot operate normally due to the unstable connection between the fan 80 and the housing 10 in the operation process of the fan 80 is prevented.

In some alternative embodiments, the air flow area of the first opening 101 is smaller than the air flow area of the second opening 102.

By adopting the purification assembly for the biosafety cabinet provided by the embodiment of the disclosure, by setting the air circulation area of the first opening 101 to be smaller than the air circulation area of the second opening 102, most of the air in the housing 10 can flow out of the housing 10 through the second opening 102, and a small part of the air in the housing 10 flows out of the housing 10 through the first opening 101. By controlling the relative size ratios of the air flow areas of the first opening 101 and the second opening 102, the ratio of the flow distribution of the air flow flowing out of the housing 10 can be controlled.

When the blower 80 is disposed on the rear side wall of the casing 10 as shown in fig. 2, the air flow blown out from the air outlet side of the blower 80 is uniformly blown out vertically in the blower 80, that is, the aerodynamic force of the air flowing toward the first filter 20 and the aerodynamic force of the air flowing toward the second filter 30 in the casing 10 are substantially the same, and at this time, the flow distribution of the air in the casing 10 is mainly determined by the air flow areas of the first opening 101 and the second opening 102.

Preferably, the ratio of the air flow area of the second opening 102 to the air flow area of the first opening 101 is 7 to 3, so that 70% of the air flow in the housing 10 flows out of the housing 10 after flowing through the second filter 30 along the second opening 102, and 30% of the air flow in the housing 10 flows out of the housing 10 from the exhaust port through the first filter 20 along the first opening 101.

As shown in fig. 5, 6 and 7, an embodiment of the present disclosure provides a biosafety cabinet, including: the cabinet body 90 and the purification assembly for a biosafety cabinet according to any one of the above embodiments are provided in the cabinet body 90.

The biosafety cabinet provided by the embodiment of the disclosure has all the beneficial effects of the purification component for the biosafety cabinet in any one of the above embodiments because the purification component for the biosafety cabinet comprises any one of the above embodiments, and the details are not repeated herein.

In some optional embodiments, the biosafety cabinet further comprises: a first fixing member 91 and a second fixing member 92, the first fixing member 91 being provided at the rear side of the housing 10; the second fixing member 92 is disposed on the cabinet 90 and corresponds to the first fixing member 91, and a groove 921 is formed on the second fixing member 92; the first fixing member 91 is provided with a rotating shaft 911, and the rotating shaft 911 is matched with the groove 921, so that the first fixing member 91 is connected with the second fixing member 92 and can rotate relative to the second fixing member 92.

With the biosafety cabinet provided by the embodiment of the disclosure, as shown in fig. 6 and 7, the first fixing member 91 is disposed on the outer side of the rear side wall of the housing 10, and the second fixing member 92 adapted to the first fixing member 91 is disposed on the rear side wall of the cabinet body 90 corresponding to the first fixing member 91, so that the housing 10 can be quickly fixed and mounted. By providing the groove 921 on the second fixing member 92, the rotating shaft 911 of the first fixing member 91 can slide into the groove 921 from the opening of the groove 921, so that one end of the housing 10 can be limited, the housing 10 can be slightly rotated relative to the second fixing member 92, and the housing 10 can be quickly positioned and installed.

Alternatively, as shown in fig. 7, an upper portion of one end of the second fixing member 92 close to the first fixing member 91 forms an escape space 922 so as to facilitate the rotation of the escape casing 10. Thus, by disposing the second fixing member 92 away from each other, the range of the rotational angle of the housing 10 can be increased.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify 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 illustrated in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A decontamination module for a biosafety cabinet, comprising:

the shell (10) is provided with a first opening (101) and a second opening (102), and the first opening (101) and the second opening (102) are oppositely arranged;

a first filter (20) provided above the housing (10) and disposed corresponding to the first opening (101);

a second filter (30) provided below the housing (10) and corresponding to the second opening (102);

wherein, casing (10) first filter (20) with second filter (30) enclose jointly and close out purification space, second filter (30) casing (10) with first filter (20) from the bottom up compresses tightly the installation setting in proper order to reduce the installation and purify the installation time of subassembly.

2. The decontamination assembly for a biosafety cabinet according to claim 1, further comprising:

and the elastic pressing block (40) is arranged at the edges of the upper end and the lower end of the first filter (20) and the second filter (30) so as to press and install the first filter (20) and the second filter (30).

3. The decontamination assembly for a biosafety cabinet according to claim 2,

and a flange (1021) is arranged at the edge of the second opening (102), and the flange (1021) extends towards the inside of the shell (10) so as to enable the second opening (102) to press the elastic pressing block (40) of the second filter (30).

4. The decontamination assembly for a biosafety cabinet according to claim 3, further comprising:

the base (11) is arranged below the second filter (30) and used for supporting and fixing the second filter (30);

the pressing piece (50) is vertically arranged on one side of the second filter (30), one end of the pressing piece (50) is connected with the shell (10), and the other end of the pressing piece (50) extends to the upper part of the base (11) and is connected with the base (11);

wherein a gap is formed between the other end of the pressing member (50) and the top surface of the base (11), and the gap between the other end of the pressing member (50) and the top surface of the base (11) is reduced by tightening a bolt and a nut to press the housing (10) and the second filter (30).

5. The decontamination assembly for a biosafety cabinet according to claim 4,

the compression block is arranged at the top end of the first filter (20) and corresponds to the elastic compression block (40) of the first filter (20), and the compression block is suitable for being arranged on the top wall of the biological safety cabinet so as to compress the first filter (20) and the shell (10) by fastening the top wall of the biological safety cabinet.

6. The decontamination assembly for a biosafety cabinet according to claim 1, further comprising:

the positioning block (70) is arranged on the upper end face of the shell (10) and surrounds the first opening (101), and can enable the first filter (20) and the first opening (101) to be positioned quickly.

7. The decontamination assembly for a biosafety cabinet according to any one of claims 1 to 6, further comprising:

the fan (80) is arranged in the shell (10), and an air inlet of the fan (80) is communicated with the outside of the shell (10) so that air outside the shell (10) flows into the shell (10) under the driving of the fan (80) and flows out of the shell (10) from the first opening (101) and the second opening (102).

8. The decontamination assembly for a biosafety cabinet according to claim 7,

the air flow area of the first opening (101) is smaller than the air flow area of the second opening (102).

9. A biosafety cabinet, comprising:

a cabinet body (90);

a decontamination assembly for a biosafety cabinet according to any one of claims 1 to 8, disposed within the cabinet body (90).

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

a first fixing member (91) provided on the rear side of the housing (10);

the second fixing piece (92) is arranged on the cabinet body (90) and corresponds to the position of the first fixing piece (91), and a groove (921) is formed in the second fixing piece (92);

the first fixing piece (91) is provided with a rotating shaft (911), and the rotating shaft (911) is matched with the groove (921) so that the first fixing piece (91) is connected with the second fixing piece (92) and can rotate relative to the second fixing piece (92).

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