CN218359297U - Vertical biological safety cabinet - Google Patents

Abstract

The application relates to the technical field of biological safety cabinets and discloses a vertical biological safety cabinet, which comprises: the cabinet body is provided with an accommodating cavity with an opening at the front part and an exhaust port; the operation chamber is arranged at the lower part of the accommodating cavity, an operation space with an operation opening is formed in the operation chamber, the operation opening is arranged corresponding to the opening and provided with a first through hole, so that air in the operation chamber can flow into the accommodating cavity; the purification chamber is arranged above the operation chamber, the upper end of the purification chamber is communicated with the exhaust port, a first filter is arranged at the communication position of the upper end of the purification chamber and the exhaust port, and a second filter is arranged at the communication position of the lower end of the purification chamber and the upper end of the operation chamber; the fan is arranged at the rear part of the purification chamber, an air inlet of the fan is communicated with the accommodating cavity, and a flow channel is formed by the accommodating cavity at the rear part of the operation chamber and the accommodating cavity at the rear part of the purification chamber. This application can promote the air-out homogeneity of biological safety cabinet.

Description

Vertical biological safety cabinet

Technical Field

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

Background

Biological Safety Cabinet (BSC), also called Biological or microbiological Safety Cabinet, is a completely closed ventilated laboratory workspace designed to protect personnel, laboratory environment and samples of the external natural environment, experiments, from exposure to aerosols and spills that may be generated during the above operations, while operating or testing microbiological experiments with infectivity, for the safe handling of contaminated (or potentially contaminated) pathogens requiring materials with defined biosafety levels. There are several different types of biosafety cabinets (i.e., class I, class II, or class III) that are distinguished from each other by the degree of biosafety 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.

The biological safety cabinet comprises a cabinet body enclosed by a left side wall, a right side wall, a top wall, a bottom wall and a rear wall, wherein a middle cross beam and a middle partition wall horizontally arranged along the middle cross beam are arranged in the middle of the cabinet body, the middle partition wall divides the cabinet body into an upper filtering area and a lower working area, a sealing baffle is arranged at the front part of the filtering area, a door body capable of being pushed and pulled up and down is arranged at the front part of the working area, at least a cabinet body part of the working area is provided with a hollow air channel formed by an inner container and an outer wall, a fan communicated with the air channel is arranged in the filtering area, a ventilating filter layer capable of supplying air through the fan is arranged in the top wall and/or the middle partition wall of the cabinet body, and air inlets communicated with the air channel are arranged at least on the outer side of the inner container of the bottom wall of the working area and the middle lower parts of the outer sides of the inner containers of the left side wall and the right side wall.

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:

among the correlation technique, the fan of biological safety cabinet is installed on the left side or the right side of workspace top, can lead to the wind pressure that biological safety cabinet workspace corresponds the regional air-out of fan side to be higher, and workspace both sides air-out is inhomogeneous, sets up a plurality of air intakes moreover, leads to the air flow resistance increase, influences the internal air current of cabinet and flows, can produce great wind and make an uproar, influences user's use and experiences.

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 vertical biological safety cabinet to solve the problem that the air-out of the biological safety cabinet is not uniform and the air-out experience is poor.

Embodiments of a first aspect of the present application provide a vertical biosafety cabinet comprising: the cabinet body constructs an accommodating cavity with an opening at the front part, and an exhaust port is formed at the top end of the cabinet body; the operation chamber is arranged at the lower part of the accommodating cavity, an operation space with an operation opening is formed in the operation chamber, the operation opening is arranged corresponding to the opening so that a user can conveniently stretch a hand into the operation space to operate, and a plurality of first through holes are formed in the rear end of the operation chamber so that air in the operation chamber can flow into the accommodating cavity; the purifying chamber is arranged in the accommodating cavity and is positioned above the operating chamber, the upper end of the purifying chamber is communicated with the exhaust port, a first filter is arranged between the upper end of the purifying chamber and the exhaust port so that air in the purifying chamber can be exhausted out of the cabinet body along the exhaust port after being filtered, and a second filter is arranged at the communication position where the lower end of the purifying chamber is communicated with the upper end of the operating chamber so that the air in the purifying chamber can flow into the operating chamber after being filtered; the fan is arranged in the purifying chamber and positioned at the rear part of the purifying chamber, an air inlet of the fan is communicated with the accommodating cavity, and an air outlet of the fan is arranged in the purifying chamber; the accommodating cavity at the rear part of the operation chamber and the accommodating cavity at the rear part of the purification chamber form a flow passage so that air in the operation chamber can flow into the purification chamber under the driving of the fan.

In some optional embodiments, the vertical biosafety cabinet further comprises: the rear side wall of the purifying chamber is obliquely arranged relative to the cabinet body, so that the air circulation space between the rear part of the purifying chamber and the rear side wall of the cabinet body is enlarged, and the air flow resistance of the air sucked by the fan is reduced.

In some optional embodiments, the fan is a volute-free centrifugal fan, and an air outlet of the volute-free centrifugal fan is arranged in the longitudinal direction, so that the volute-free centrifugal fan uniformly blows air.

In some optional embodiments, the vertical biosafety cabinet further comprises: the supporting seat is arranged between the cabinet body and the bottom end of the operating room, and supporting tables are constructed on two sides of the supporting seat and used for supporting and fixing the operating room; an air circulation channel is defined between the bottom wall of the operation chamber and the support seat, and the air circulation channel is communicated with the flow channel.

In some optional embodiments, the bottom wall of the operation chamber is provided with a second through hole, so that air in the operation chamber can flow into the air circulation channel through the second through hole.

In some alternative embodiments, the decontamination chamber comprises: the shell is provided with a first opening and a second opening, the first opening is arranged corresponding to the exhaust port, and the second opening is arranged corresponding to the operation chamber; wherein, first filter is located first opening with between the gas vent, the second filter is located the second opening with between the control chamber, partly via in the air purification room first filter flows the casing by the gas vent is discharged the cabinet body, another part by the second filter flows the casing flows into the control chamber, the second filter the casing with first filter from the bottom up compresses tightly the setting in proper order.

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

In some optional embodiments, the vertical biosafety cabinet further comprises: the filter screen is arranged in the flow channel and is higher than the first through hole, and is used for filtering larger impurities in the flow channel.

In some optional embodiments, the vertical biosafety cabinet further comprises: and the shielding plate is movably arranged at the air outlet and used for closing or opening the air outlet.

In some optional embodiments, the vertical biosafety cabinet further comprises: the lifting door mechanism is arranged on the front end face of the cabinet body and can move up and down to open or close the opening.

The vertical biological safety cabinet provided by the embodiment of the disclosure can realize the following technical effects:

the vertical biological safety cabinet can enable air flowing into the flow channel from the operation chamber to directly flow upwards into the purification chamber and then flow back into the operation chamber after being filtered, so that the obstruction in the flow channel is less, and the flowing resistance of the air in the flow channel can be effectively reduced; in addition, the fan setting can reduce the length of runner at the rear portion of clean room on the one hand, promotes air current circulation speed, and on the other hand compares in the design of fan setting on the left side or the right side of clean room, promotes the homogeneity of left and right sides air-out when the clean room is to the control chamber air-out with the fan can set up at the rear portion of clean room, promotes biological safety cabinet's air-out effect.

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 an exploded view of a vertical biosafety cabinet from one perspective provided by an embodiment of the present disclosure;

fig. 2 is a schematic diagram of an exploded view of a vertical biosafety cabinet from another perspective provided by an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a vertical biosafety cabinet according to an embodiment of the disclosure;

FIG. 4 is an exploded view of a vertical biosafety cabinet according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a partial structure of a vertical biosafety cabinet according to an embodiment of the disclosure;

fig. 6 is an exploded view of a partial structure of another vertical biosafety cabinet according to an embodiment of the disclosure.

Reference numerals:

10: cabinet body, 101: opening, 102: accommodating chamber, 11: top plate, 111: exhaust port, 12: bottom plate, 13: back plate, 14: left side plate, 15: right side plate, 16: beam, 17: a resilient clamping member,

20: operation room, 201: operation port, 202: first through hole, 203: a second through hole,

30: clean room, 31: first filter, 32: a housing, 321: first opening, 322: second opening, 323: third opening, 33: second filter, 34, first mount, 35, second mount, 36: a pressing piece,

40: fan, 41: fastener, 50: front panel, 60: shielding plate, 70: a filter screen,

80: supporting seat, 801: support table, 802: flanging and 81: a supporting plate,

90: flow passage, 91: an air circulation passage.

Detailed Description

So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit 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 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.

In conjunction with fig. 1-6, in which arrows indicate the direction of airflow, embodiments of the present disclosure provide a vertical biosafety cabinet comprising: the cabinet comprises a cabinet body 10, an operation chamber 20, a purification chamber 30 and a fan 40, wherein the cabinet body 10 forms an accommodating cavity 102 with an opening 101 at the front part, and the top end of the cabinet body 10 is provided with an exhaust port 111; the operation chamber 20 is arranged at the lower part of the accommodating cavity 102, the operation chamber 20 forms an operation space with an operation opening 201, the operation opening 201 is arranged corresponding to the opening 101 so that a user can conveniently stretch a hand into the operation space to operate, and the rear end of the operation chamber 20 is provided with a plurality of first through holes 202 so that air in the operation chamber 20 can flow into the accommodating cavity 102; the purifying chamber 30 is arranged in the accommodating cavity 102 and above the operating chamber 20, an air outlet 111 at the upper end of the purifying chamber 30 is communicated, a first filter 31 is arranged between the upper end of the purifying chamber 30 and the air outlet 111 so that the air in the purifying chamber 30 can be filtered and then discharged out of the cabinet body 10 along the air outlet 111, and a second filter 33 is arranged at the communication position where the lower end of the purifying chamber 30 is communicated with the upper end of the operating chamber 20 so that the air in the purifying chamber 30 can flow into the operating chamber 20 after being filtered; the fan 40 is arranged in the purification chamber 30 and positioned at the rear part of the purification chamber 30, an air inlet of the fan 40 is communicated with the accommodating cavity 102, and an air outlet of the fan 40 is arranged in the purification chamber 30; the rear partial accommodation cavity 102 of the operation chamber 20 and the rear partial accommodation cavity 102 of the clean room 30 form a flow channel 90, so that air in the operation chamber 20 can flow into the clean room 30 under the driving of the fan 40.

By adopting the vertical biological safety cabinet provided by the embodiment of the disclosure, the cabinet body 10 is arranged, and the accommodating cavity 102 with the opening 101 is formed in the cabinet body 10, so that other components can be conveniently placed in the cabinet body 10 and air circulation can be conveniently carried out; an opening 101 is formed in the front wall of the cabinet 10, so that a user can conveniently place objects into the accommodating cavity 102 from the opening 101, the operation chamber 20 and the purification chamber 30 are arranged in the accommodating cavity 102 of the cabinet 10 and are arranged along the vertical direction, an operation space is formed in the operation chamber 20, a purification space is formed in the purification chamber 30, the remaining space part in the accommodating cavity 102 forms the flow channel 90, and as shown in fig. 3, the accommodating cavity 102 at the rear part of the operation chamber 20 and the accommodating cavity 102 at the rear part of the purification chamber 30 form the flow channel 90 which is communicated with each other; a plurality of first through holes 202 are formed at the rear end of the operating chamber 20, so that the operating space is communicated with the flow channel 90, that is, air in the operating chamber 20 can flow into the flow channel 90 along the first through holes 202; the upper end of the clean room 30 is communicated with the exhaust port 111, a first filter 31 is disposed between the upper end of the clean room 30 and the exhaust port 111, the air in the clean room 30 can flow out of the cabinet 10 through the exhaust port 111 after being filtered by the first filter 31, a second filter 33 is disposed at a communication position where the lower end of the clean room 30 is communicated with the upper end of the operation room 20, the air in the clean room 30 can flow into the operation room 20 after being filtered by the second filter 33, the fan 40 is disposed in the clean room 30 and located at the rear portion of the clean room 30, the air inlet of the fan 40 is communicated with the accommodating cavity 102, the air outlet of the fan 40 is disposed in the clean room 30, that is, the air in the flow channel 90 can flow into the air inlet of the fan 40 and flow into the clean room 30 through the air outlet of the fan 40.

The flow channel 90 in this embodiment enables the air flowing into the flow channel 90 from the operation chamber 20 to directly flow upwards into the purification chamber 30, and then flow back into the operation chamber 20 after being filtered, so that the obstruction in the flow channel 90 is less, and the resistance of the air flowing in the flow channel 90 can be effectively reduced; in addition, fan 40 sets up at the rear portion of clean room 30, can reduce runner 90's length on the one hand, promotes the air current circulation rate, and on the other hand compares in the design that fan 40 set up on the left side or the right side of clean room 30, and the homogeneity of left and right sides air-out when promoting clean room 30 to the air-out of control chamber 20 with fan 40 can set up at the rear portion of clean room 30 promotes the air-out effect of biosafety cabinet.

When the biosafety cabinet is in use, the fan 40 is started, air in the flow passage 90 at the rear part of the purification chamber 30 is sucked into the purification chamber 30, negative pressure is formed in the flow passage 90 at the rear part of the purification chamber 30, that is, the upper flow passage 90 in the cabinet body 10 is in a negative pressure state, at this time, air in the lower flow passage 90 in the cabinet body 10 flows upwards under the action of pressure, the negative pressure region moves downwards, so that air in the operation chamber 20 flows into the flow passage 90 along the first through hole 202, at this time, the pressure in the purification chamber 30 is greater than the pressure in the operation chamber 20, a part of air in the purification chamber 30 flows into the operation chamber 20 through the second filter 33 between the operation chamber 20 and the purification chamber 30, another part of air in the purification chamber 30 is discharged out of the cabinet body 10 through the first filter 31 between the purification chamber 30 and the exhaust port 111, and after the air with viruses or germs is filtered through the first filter 31 or the second filter 33, viruses or germs therein are adsorbed or killed, and become pure air.

Exemplarily, the cabinet 10 is a cubic structure, including cuboid or square structure, and the cabinet 10 includes roof 11, bottom plate 12, backplate 13, left side board 14 and right side board 15, and roof 11, bottom plate 12, backplate 13, left side board 14 and right side board 15 enclose the cabinet 10 that closes the front portion and have uncovered 101, and the middle part at roof 11 is seted up to gas vent 111.

Optionally, the vertical biosafety cabinet further comprises: the front panel 50 is disposed on the front end surface of the cabinet 10 and detachably connected to the front end surface of the cabinet 10 to seal or seal the front opening 101 of the cabinet 10, so that the upper accommodating chamber 102 in the cabinet 10 forms a closed space to prevent air with virus or germs from leaking from the upper opening 101.

Illustratively, the vertical biosafety cabinet further comprises: the elastic clamping piece 17 is arranged on the front end face of the cabinet body 10, one end of the elastic clamping piece 17 is fixedly connected with the front end face of the cabinet body 10, and the other end of the elastic clamping piece 17 is bent back and forth and extends to clamp an object to be clamped; wherein the upper part of the spring clamp 17 can be brought into contact with the front face when there is no object to be clamped between the upper part and the front face.

In this way, by providing the elastic clamping member 17, when the front panel 50 is connected to the cabinet 10, a portion of the front panel 50 is located between the other end of the elastic clamping member 17 and the front end surface of the cabinet 10, and the front panel 50 is fixed to the front end of the cabinet 10 by the force applied to the front panel 50 by the elastic clamping member 17 and the frictional force generated between the front panel 50 and the cabinet 10.

As shown in fig. 5, the elastic clamping member 17 includes a first end and a second end, the first end is connected to the cabinet 10 along the vertical fixation, the second end includes a first connecting plate, a second connecting plate and a third connecting plate, the first connecting plate, the second connecting plate and the third connecting plate are connected in sequence, wherein the first connecting plate extends along the direction departing from the cabinet 10, the second connecting plate extends along the direction towards the cabinet 10, the third connecting plate extends along the direction departing from the cabinet 10, and the joint of the second connecting plate and the third connecting plate contacts with the cabinet 10.

Optionally, the vertical biosafety cabinet further comprises: the limiting plate is arranged in the accommodating cavity 102 and behind the operation chamber 20, the limiting plate is transversely arranged, two ends of the limiting plate are connected with the cabinet body 10, and the limiting plate is used for preventing the operation chamber 20 from moving backwards when the operation chamber 20 is installed. Thus, the operation chamber 20 can be prevented from moving backward by providing the stopper plate.

In some embodiments, the rear sidewall of the clean room 30 is disposed obliquely with respect to the cabinet 10 to increase an air circulation space between the rear portion of the clean room 30 and the rear sidewall of the cabinet 10 and reduce air flow resistance of the air drawn by the blower 40.

The rear side wall of the purification chamber 30 is disposed obliquely with respect to the cabinet 10, as shown in fig. 3, that is, the rear side wall of the purification chamber 30 is disposed obliquely with respect to the vertical plane where the rear side wall of the cabinet 10 is located toward the direction away from the rear side wall of the cabinet 10, that is, the distance between the upper end of the rear side wall of the purification chamber 30 and the rear side wall of the cabinet 10 is greater than the distance between the lower end of the rear side wall of the purification chamber 30 and the rear side wall of the cabinet 10.

Adopt the vertical biosafety cabinet that this disclosed embodiment provided, through the back lateral wall slope setting with clean room 30, can increase the air inlet space of fan 40's air intake department, and then reduce fan 40's the resistance of breathing in, promote fan 40's work efficiency.

In some embodiments, the fan 40 is a volute-less centrifugal fan, and the air outlet of the volute-less centrifugal fan is arranged along the longitudinal direction, so that the volute-less centrifugal fan uniformly blows air.

Adopt the vertical biosafety cabinet that this disclosed embodiment provided, through setting up no spiral case centrifugal fan, compare in adopting spiral case formula centrifugal fan, because there is not blockking of spiral case in no spiral case centrifugal fan's air-out side, no spiral case centrifugal fan air-out side can be towards the even air-out of the circumference of worm wheel, no spiral case centrifugal fan's air outlet sets up along vertically, that is to say, no spiral case centrifugal fan is along vertical even air-out, can make the air of upwards flow in the clean room 30 and the flow of the air of downward flow unanimous basically, and then promote the homogeneity of clean room 30 air-out. In addition, the volute-less centrifugal fan can effectively reduce noise generated when the fan 40 rotates.

Optionally, the vertical biosafety cabinet further comprises: and a fastening member 41, wherein the fastening member 41 is arranged corresponding to the fan 40 and connected with the rear side wall of the purification chamber 30 to reinforce the connection between the fan 40 and the purification chamber 30.

Referring to fig. 3 and 4, the fastening member 41 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 sidewall of the clean room 30, and the second folded edge is abutted to the air outlet side of the fan 40 to enhance the connection between the fan 40 and the clean room 30.

In this way, by arranging the fastening member 41, the connection between the fan 40 and the clean room 30 can be strengthened, and the situation that the fan 40 vibrates too much or the fan 40 cannot operate normally due to the unstable connection between the fan 40 and the clean room 30 in the operation process of the fan 40 can be prevented.

In some embodiments, the vertical biosafety cabinet further comprises: a support base 80 disposed between the cabinet 10 and the bottom end of the operation chamber 20, wherein support tables 801 are configured on two sides of the support base 80 for supporting and fixing the operation chamber 20; wherein, an air circulation passage 91 is defined between the bottom wall of the operation chamber 20 and the support seat 80, and the air circulation passage 91 is communicated with the flow passage 90.

By adopting the vertical biosafety cabinet provided by the embodiment of the disclosure, the supporting seat 80 is arranged between the bottom wall of the cabinet body 10 and the bottom end of the operation chamber 20, so that an air circulation channel 91 is formed between the bottom end of the operation chamber 20 and the bottom end of the cabinet body 10.

Illustratively, as shown in fig. 6, the middle of the supporting seat 80 is recessed to form a cavity, supporting seats 801 are formed on two sides, the left end of the supporting seat 801 on the left side extends vertically upwards to form a flange 802, the right end of the supporting seat 801 on the right side extends vertically upwards to form a flange 802, and the flanges 802 are arranged on two ends of the supporting seat 80, so that the operation chamber 20 can be prevented from being displaced relative to the supporting seat 80 in the left-right direction, and the stable connection between the operation chamber 20 and the supporting seat 80 can be ensured. In addition, the middle of the supporting seat 80 forms an unshielded cavity, which can effectively reduce the resistance of the airflow to ensure the smooth airflow circulation.

Optionally, the vertical biosafety cabinet further comprises: the supporting plate 81 is disposed between the supporting base 80 and the bottom wall of the cabinet 10 and abutted against each other to enhance the supporting strength of the supporting base 801. In this way, by providing one support plate 81 under each of the support bases 801 on the left and right sides, the support strength of the support bases 801 can be effectively enhanced, and the support bases 801 can be prevented from being broken or bent.

In some embodiments, the bottom wall of the operation chamber 20 is opened with a second through hole 203, so that the air in the operation chamber 20 can flow into the air circulation channel 91 through the second through hole 203.

By adopting the vertical biosafety cabinet provided by the embodiment of the disclosure, the second through hole 203 is arranged on the bottom wall of the operation chamber 20, the air in the operation chamber 20 can flow to the air circulation channel 91 below the operation chamber 20 along the second through hole 203, the air discharge speed in the operation chamber 20 is increased, and then a large negative pressure can be formed in the operation chamber 20, so that the external air at the operation port 201 also flows into the operation chamber 20 under the action of pressure, and the air in the operation chamber 20 is prevented from flowing out from the operation port 201 at the front part of the operation chamber 20 to cause harm to an operator.

In some embodiments, the decontamination chamber 30 includes: a housing 32, a first filter 31 and a second filter 33, wherein the housing 32 is provided with a first opening 321 and a second opening 322, the first opening 321 is arranged corresponding to the exhaust port 111, and the second opening 322 is arranged corresponding to the operation chamber 20; wherein, the first filter 31 is disposed between the first opening 321 and the air outlet 111, the second filter 33 is disposed between the second opening 322 and the operation chamber 20, a part of the air in the clean room 30 flows out of the casing 32 through the first filter 31 and is exhausted out of the cabinet 10 through the air outlet 111, another part of the air flows out of the casing 32 through the second filter 33 and flows into the operation chamber 20, and the second filter 33, the casing 32 and the first filter 31 are sequentially pressed from bottom to top.

By adopting the vertical biological safety cabinet provided by the embodiment of the disclosure, through arranging the shell 32, the first filter 31 and the second filter 33, the air exhausted from the purifying chamber 30 can be ensured to be filtered, and the safety of the air flow flowing out from the purifying chamber 30 is ensured. Through pressing second filter 33, casing 32 and first filter 31 in proper order from the bottom up and installing the setting, pressing the installation and can satisfying the leakproofness requirement of purification subassembly, prevent effectively that the air in the casing 32 from flowing out from the gap between first filter 31 and the casing 32 and/or between second filter 33 and the casing 32. In addition, the installation space required by the purifying chamber 30 can be reduced, and the volume of the vertical biological safety cabinet can be further reduced, so that the vertical biological safety cabinet is more miniaturized.

Optionally, a third opening 323 is formed in a rear side wall of the housing 32, the third opening 323 is adapted to a size of an air inlet of the fan 40, and the third opening 323 is connected to the air inlet of the fan 40, so that the external air flows into the housing 32 along the third opening 323.

Optionally, the vertical biosafety cabinet further comprises: a first fixing member 34 and a second fixing member 35, the first fixing member 34 being provided at the rear side of the housing 32; the second fixing piece 35 is arranged on the back plate 13 of the cabinet body 10 and corresponds to the first fixing piece 34, and a groove is formed in the second fixing piece 35; the first fixing member 34 is provided with a rotating shaft, and the rotating shaft is matched with the groove, so that the first fixing member 34 is connected with the second fixing member 35 and can rotate relative to the second fixing member 35.

Thus, as shown in fig. 3, 4 and 5, the first fixing member 34 is disposed on the outer side of the rear side wall of the casing 32, and the second fixing member 35 adapted to the first fixing member 34 is disposed at the position of the cabinet 10 corresponding to the first fixing member 34, so that the casing 32 can be quickly fixed and installed. By providing the second fixing member 35 with a groove, the rotating shaft of the first fixing member 34 can slide into the groove from the opening of the groove, so that one end of the housing 32 can be limited, the housing 32 can be slightly rotated relative to the second fixing member 35, and the housing 32 can be quickly positioned and installed.

Optionally, the cabinet body is further provided with a cross beam 16, the cross beam 16 is used for fixedly mounting a second filter, and the vertical biological safety cabinet further includes: and the pressing piece 36 is vertically arranged on one side of the second filter 33, one end of the pressing piece 36 is connected with the shell 32, the other end of the pressing piece 36 extends above the cabinet body cross beam 16 and is connected with the cross beam 16, a gap exists between the other end of the pressing piece 36 and the top surface of the cross beam 16, and the gap between the other end of the pressing piece 36 and the top surface of the cross beam 16 is reduced by screwing bolts and nuts so as to press the shell 32 and the second filter 33.

Thus, through the arrangement of the cross beam 16 and the pressing piece 36, one end of the pressing piece 36 is connected with the shell 32, the other end of the pressing piece 36 is connected with the base, a certain gap exists between the plane where the other end of the pressing piece 36 is located and the top surface of the cross beam 16, and the pressing degree of the shell 32 and the second filter 33 can be changed by changing the size of the gap between the two. In addition, the pressing member 36 may also fix the position of the housing 32 against displacement of the housing 32 relative to the second filter 33.

Alternatively, the first filter 31 and the second filter 33 may be high efficiency air filters, and may also be ultra high efficiency air filters.

Thus, the first filter 31 and the second filter 33 can achieve a filtering efficiency of more than 99.99% for dust particles such as particles, smoke, microorganisms and the like, and the cleanliness of the air filtered by the first filter 31 and the second filter 33 can meet the air flow cleanliness standard of the biosafety cabinet.

Illustratively, the first filter 31 and the second filter 33 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 some embodiments, the air flow area of the first opening 321 is smaller than the air flow area of the second opening 322.

By adopting the vertical biosafety cabinet provided by the embodiment of the disclosure, the air circulation area of the first opening 321 is smaller than the air circulation area of the second opening 322, so that most of the air in the clean room 30 flows into the operation room 20 through the second opening 322, and a small part of the air in the clean room 30 is discharged out of the cabinet body 10 through the first opening 321. By controlling the size ratio of the first opening 321 to the second opening 322, on one hand, the flow distribution ratio of the air flowing out of the clean room 30 can be controlled, on the other hand, the air flow of the biosafety cabinet sucking the outside air from the operation opening 201 of the operation room 20 can be reduced by reducing the air flow discharged out of the cabinet body 10, and the air flow of the outside air to be filtered by the first filter 31 and the second filter 33 can be reduced, so that the service lives of the first filter 31 and the second filter 33 can be prolonged.

Preferably, the ratio between the air flow area of the second opening 322 and the air flow area of the first opening 321 is 7 to 3, so that 70% of the air flow in the clean room 30 flows into the operation room 20 after flowing through the second filter 33 along the second opening 322, and 30% of the air flow in the clean room 30 is discharged out of the cabinet 10 from the exhaust port 111 through the first filter 31 along the first opening 321.

In some embodiments, the vertical biosafety cabinet further comprises: the filter screen 70 is disposed in the flow channel 90 and higher than the first through hole 202, and the filter screen 70 is used for filtering larger impurities in the flow channel 90.

By adopting the vertical biosafety cabinet provided by the embodiment of the disclosure, the filter screen 70 is arranged in the flow channel 90, and the filter screen 70 is higher than the first through hole 202, so that the air flowing into the flow channel 90 from the first through hole 202 and the air flowing into the flow channel 90 from the air circulation channel 91 can be subjected to primary filtration, large particles such as dust, debris and fibers contained in the air are filtered, the filtration burden of the first filter 31 and the second filter 33 is reduced, and the service life of the whole first filter 31 and the whole second filter 33 is prolonged.

In some embodiments, the vertical biosafety cabinet further comprises: the shielding plate 60 is movably disposed at the exhaust port 111, and is used for closing or opening the exhaust port 111.

By adopting the vertical biosafety cabinet provided by the embodiment of the disclosure, the movable shielding plate 60 can open or close the air outlet 111 by arranging the shielding plate 60. In the use process of the vertical biological safety cabinet, the user can open the baffle plate 60 to ensure the normal air outlet of the air outlet 111, and in the shutdown process of the vertical biological safety cabinet, the user can close the baffle plate 60 to avoid the particles such as the outside air or dust from falling into the first filter 31 from the air outlet, so that the service life of the first filter 31 is shortened.

Optionally, the top end of the cabinet body 10 is provided with a limiting block, the shielding plate 60 is provided with a sliding groove, the sliding groove is matched with the limiting block, the limiting block is arranged on two sides of the exhaust port 111, the limiting block is located in the sliding groove, and the sliding groove can move along the extending direction of the sliding groove under the limitation of the limiting block, so that the shielding plate 60 can slide relative to the exhaust port 111, and the exhaust port 111 is opened or closed.

In some embodiments, the vertical biosafety cabinet further comprises: the lifting door mechanism is arranged on the front end face of the cabinet body 10 and can automatically lift to open or close the operation opening 201.

By adopting the vertical biological safety cabinet provided by the embodiment of the disclosure, the operation opening 201 can be automatically opened or closed by arranging the lifting door mechanism, when the vertical biological safety cabinet is closed, the operation opening 201 can be closed, and dust or particles with germs outside and the like are prevented from falling into the operation space from the operation opening 201.

Illustratively, the lifting door mechanism comprises two guide rails, a glass door and a driving device, wherein the two guide rails are positioned at two sides of the operation opening 201; the two sides of the glass door are respectively matched with the guide rails on the corresponding sides, are embedded in the guide rails and can reciprocate along the up-down direction of the guide rails; the driving device is arranged at the front part of the cabinet body 10, is positioned above the operation opening 201, and is in driving connection with the glass door, and the driving device is used for driving the glass door to reciprocate along the up-down direction of the guide rail so as to open or close the operation opening 201.

The above description and the 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 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 (10)

1. A vertical biosafety cabinet, comprising:

the refrigerator comprises a cabinet body (10) and a cabinet body (10), wherein an accommodating cavity (102) with an opening (101) at the front part is formed, and an exhaust port (111) is formed in the top end of the cabinet body (10);

the operation chamber (20) is arranged at the lower part of the accommodating cavity (102), an operation space with an operation opening (201) is formed in the operation chamber (20), the operation opening (201) is arranged corresponding to the opening (101) so that a user can conveniently stretch a hand into the operation space to operate, and a plurality of first through holes (202) are formed in the rear end of the operation chamber (20) so that air in the operation chamber (20) can flow into the accommodating cavity (102);

the purifying chamber (30) is arranged in the accommodating cavity (102) and is positioned above the operating chamber (20), the upper end of the purifying chamber (30) is communicated with the exhaust port (111), a first filter (31) is arranged between the upper end of the purifying chamber (30) and the exhaust port (111) so that air in the purifying chamber (30) can be discharged out of the cabinet body (10) along the exhaust port (111) after being filtered, and a second filter (33) is arranged at the communication position where the lower end of the purifying chamber (30) is communicated with the upper end of the operating chamber (20) so that air in the purifying chamber (30) can flow into the operating chamber (20) after being filtered;

the fan (40) is arranged in the purifying chamber (30) and is positioned at the rear part of the purifying chamber (30), an air inlet of the fan (40) is communicated with the accommodating cavity (102), and an air outlet of the fan (40) is arranged in the purifying chamber (30);

wherein a part of the containing cavity (102) at the rear of the operation chamber (20) and a part of the containing cavity (102) at the rear of the purification chamber (30) form a flow channel (90) so that air in the operation chamber (20) can flow into the purification chamber (30) under the driving of the fan (40).

2. The vertical biosafety cabinet according to claim 1,

the rear side wall of the purifying chamber (30) is obliquely arranged relative to the cabinet body (10) so as to increase the air circulation space between the rear part of the purifying chamber (30) and the rear side wall of the cabinet body (10) and reduce the air flow resistance sucked by the fan (40).

3. The vertical biosafety cabinet according to claim 2,

the fan (40) is a volute-free centrifugal fan (40), and an air outlet of the volute-free centrifugal fan (40) is longitudinally arranged so that air can be uniformly discharged from the volute-free centrifugal fan (40).

4. The vertical biosafety cabinet according to claim 1, further comprising:

the supporting seat (80) is arranged between the cabinet body (10) and the bottom end of the operating room (20), and supporting tables (801) are constructed on two sides of the supporting seat (80) and used for supporting and fixing the operating room (20);

wherein an air circulation channel (91) is defined between the bottom wall of the operation chamber (20) and the support seat (80), and the air circulation channel (91) is communicated with the flow channel (90).

5. The vertical biosafety cabinet according to claim 4,

the bottom wall of the operation chamber (20) is provided with a second through hole (203), so that air in the operation chamber (20) can flow into the air circulation channel (91) through the second through hole (203).

6. The vertical biosafety cabinet according to claim 5, characterized in that said decontamination chamber (30) comprises:

a housing (32) provided with a first opening (321) and a second opening (322), wherein the first opening (321) is arranged corresponding to the exhaust port (111), and the second opening (322) is arranged corresponding to the operation chamber (20);

wherein, first filter (31) locate first opening (321) with between gas vent (111), second filter (33) are located second opening (322) with between control chamber (20), the air in clean room (30) partly via first filter (31) flows out casing (32) and by gas vent (111) discharge cabinet body (10), another part by second filter (33) flow out casing (32) and flow into control chamber (20), second filter (33) casing (32) with first filter (31) from the bottom up compresses tightly the setting in proper order.

7. The vertical biosafety cabinet according to claim 6,

the air flow area of the first opening (321) is smaller than the air flow area of the second opening (322).

8. The vertical biosafety cabinet according to claim 1, further comprising:

the filter screen (70) is arranged in the flow channel (90) and is higher than the first through hole (202) and used for filtering larger impurities in the flow channel (90).

9. The vertical biosafety cabinet according to any one of claims 1 to 8, further comprising:

the shielding plate (60) is movably arranged at the exhaust port (111) and is used for closing or opening the exhaust port (111).

10. The vertical biosafety cabinet according to any of claims 1 to 8, further comprising:

the lifting door mechanism is arranged on the front end face of the cabinet body (10) and can move up and down to open or close the operation opening (201).

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