CN210361406U

CN210361406U - Biosafety cabinet with good sealing performance

Info

Publication number: CN210361406U
Application number: CN201921238057.XU
Authority: CN
Inventors: 曹逸然; 张日民; 吴烨
Original assignee: Yixing Baiao Precision Nuclear Biotechnology Co Ltd
Current assignee: Yixing Baiao Precision Nuclear Biotechnology Co Ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-04-21
Anticipated expiration: 2029-08-02

Abstract

The utility model discloses a biosafety cabinet with good sealing performance, which comprises a cabinet body, wherein the cabinet body comprises a middle cabinet, an upper cabinet is arranged above the middle cabinet, inclined glass is hermetically arranged on the front surface of the middle cabinet, an air inlet is arranged at a position close to the upper side of one side of the middle cabinet, a first HEPA filter layer is arranged inside the air inlet, a protruding cabinet is arranged on the rear surfaces of the upper cabinet and the middle cabinet, a negative pressure channel is arranged inside the protruding cabinet, a negative pressure fan is arranged inside the upper cabinet, a pollutant collecting device is detachably arranged at the air outlet pipe end of the negative pressure fan, the utility model discloses only the HEPA filter layer is arranged above a positive pressure area, thus all airflow of the positive pressure area is discharged out of the cabinet body, which avoids secondary pollution caused by the airflow of the positive pressure area entering the negative pressure area again, the utility model is provided with a pollutant collecting device, pollutant collection device can collect the pollutant in the air current, and then conveniently handles the pollutant in unison.

Description

Biosafety cabinet with good sealing performance

Technical Field

The utility model relates to a biosafety cabinet technical field specifically is a biosafety cabinet that leakproofness is good.

Background

The biological safety cabinet is a box-shaped air purification negative pressure safety device which can prevent aerosol from dissipating when some dangerous or unknown biological particles are contained in the experimental operation and treatment process. The protective screen is widely applied to scientific research, teaching, clinical examination and production in the fields of microbiology, biomedicine, genetic engineering, biological products and the like, and is the most basic safety protective equipment in the primary protective screen in the biological safety of a laboratory;

the biosafety cabinet in the prior art has the following defects:

HEPA filter layers are generally arranged above and below a positive pressure region of the existing biological safety cabinet, air filtered by the HEPA filter layer above generally escapes from the cabinet body, air filtered by the HEPA filter layer below generally returns to a negative pressure region, and air returned to the negative pressure region is generally residual pollutants after being filtered by the HEPA filter layer, so that secondary pollution is generated to the operation of the negative pressure region;

the HEPA filter layers on the upper side and the lower side of the conventional biological safety cabinet are directly used for filtering, so that pollutants are difficult to collect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a biosafety cabinet that leakproofness is good to solve the air that sends back the negative pressure zone among the prior art and generally still remaining pollutant after being filtered by HEPA filter layer, produce secondary pollution and be difficult to the problem that the pollutant was collected to the operation of negative pressure zone.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a biosafety cabinet that leakproofness is good, the intelligent cabinet temperature adjusting device comprises a cabinet body, the cabinet body is including well cabinet, the top of well cabinet is provided with the cabinet, the glass of slope is installed to the front surface sealing of well cabinet, the air intake has been seted up to the position that one side of well cabinet is close to the top, the internally mounted of air intake has first HEPA filter layer, go up the rear surface mounting of cabinet and well cabinet and have protruding cabinet, the inside of protruding cabinet sets up to negative pressure channel, the internally mounted of going up the cabinet has negative-pressure air fan, negative-pressure air fan's air-out pipe end detachable installs pollutant collection device, pollutant collection device includes aluminum alloy support and cube-shaped HEPA filter layer, cube-shaped HEPA filter layer installs the inside at aluminum alloy support, but the one side mid-mounting that goes up the cabinet.

Preferably, a lower cabinet is arranged below the middle cabinet, and supporting legs are fixed at four corners of the lower surface of the lower cabinet.

Preferably, two side-by-side gloves are mounted on the glass.

Preferably, the aluminum alloy support is a cubic frame, one side of the cubic HEPA filter layer is provided with an internal thread cylinder, and the internal thread cylinder is rotatably connected with the air outlet pipe through threads.

Preferably, a second HEPA filter layer is arranged above the inside of the upper cabinet, an upper opening is formed in the upper surface of the upper cabinet, and a positive pressure area is formed in an area between the lower surface of the second HEPA filter layer and the inner lower bottom surface of the upper cabinet.

Preferably, the rear surface of the middle cabinet is provided with an air duct, and an air inlet pipe of the negative pressure fan is inserted into the negative pressure channel.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the HEPA filter layer is only arranged above the positive pressure area, so that air flow of all the positive pressure areas is discharged out of the cabinet body, and secondary pollution caused by the fact that the air flow of the positive pressure areas enters the negative pressure area again is avoided;

2. the utility model discloses set up pollutant collection device, pollutant collection device can collect the pollutant in the air current, and then the convenience is unified to be handled the pollutant.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of a first view structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic structural view of the pollutant collecting device of the present invention;

fig. 4 is a schematic view of a second view structure according to the present invention.

In the figure: 1. an air inlet; 2. a first HEPA filter layer; 3. a cabinet body; 31. loading the cabinet; 311. an upper opening; 32. a middle cabinet; 321. an air duct; 33. a lower cabinet; 34. a protruding cabinet; 341. a negative pressure channel; 4. glass; 5. a glove; 6. a second HEPA filter layer; 7. a negative pressure fan; 71. an air inlet pipe; 72. an air outlet pipe; 8. a contaminant collection device; 81. an aluminum alloy bracket; 82. a cube-shaped HEPA filter layer; 83. an internal threaded barrel; 9. supporting legs; 10. a positive pressure region; 11. a switchable sealing glass.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and 2, in an embodiment of the present invention, a biosafety cabinet with good sealing performance includes a cabinet body 3, the cabinet body 3 includes a middle cabinet 32, an upper cabinet 31 is disposed above the middle cabinet 32, the upper cabinet 31 serves as a filtering area, a second HEPA filter layer 6 is disposed above the inside of the upper cabinet 31, the second HEPA filter layer 6 can filter out contaminants in an air flow, an upper opening 311 is disposed on an upper surface of the upper cabinet 31, the upper opening 311 is used for discharging clean air, a positive pressure area 10 is disposed between a lower surface of the second HEPA filter layer 6 and an inner lower bottom surface of the upper cabinet 31, and the positive pressure area 10 is an air outlet area of the negative pressure fan 7;

referring to fig. 1 and 2, an air duct 321 is formed in the rear surface of the middle cabinet 32, the air duct 321 is used for allowing air inside the middle cabinet 32 to enter the negative pressure channel 341, the inclined glass 4 is hermetically mounted on the front surface of the middle cabinet 32, and the glass 4 can be opened or closed, which is a known technology in the prior art and is not described herein again, the glass 4 can achieve a sealing effect when a worker works, two gloves 5 are mounted on the glass 4 side by side, the length of each glove 5 can be set according to the size of the middle cabinet 32, and when the worker inserts into the gloves 5 at a future time, articles in all areas of the lower surface inside the middle cabinet 32 can be taken;

referring to fig. 1, an air inlet 1 is formed in a position, close to the upper side, of one side of the middle cabinet 32, the air inlet 1 is used for allowing outside air to enter the middle cabinet 32, a first HEPA filter layer 2 is installed inside the air inlet 1 of the air inlet 1, the first HEPA filter layer 2 can conveniently filter the outside air, protruding cabinets 34 are installed on the rear surfaces of the upper cabinet 31 and the middle cabinet 32, a negative pressure channel 341 is formed inside the protruding cabinets 34, and the protruding cabinets 34 are used as channels for air flow;

referring to fig. 1 and 3, a negative pressure fan 7 is installed inside the upper cabinet 31, an air inlet pipe 71 of the negative pressure fan 7 is inserted into the negative pressure channel 341, a pollutant collecting device 8 is detachably installed at an air outlet pipe 72 end of the negative pressure fan 7, the negative pressure fan 7 draws air from the inside of the upper cabinet 32 through the air inlet pipe 71 and sends polluted air into the pollutant collecting device 8 through the air outlet pipe 72, and the pollutant collecting device 8 is used for collecting pollutants in the discharged air flow;

referring to fig. 2 and 3, the pollutant collecting device 8 comprises an aluminum alloy support 81 and a cubic HEPA filter layer 82, the cubic HEPA filter layer 82 is installed inside the aluminum alloy support 81, the aluminum alloy support 81 plays a role in supporting the cubic HEPA filter layer 82, the aluminum alloy support 81 is a cubic frame, one side of the cubic HEPA filter layer 82 is provided with an internal thread cylinder 83, the internal thread cylinder 83 is connected with the cubic HEPA filter layer 82 through adhesive, the cubic HEPA filter layer 82 can filter pollutants and collect the pollutants inside a cavity of the cubic HEPA filter layer, and the internal thread cylinder 83 is rotatably connected with the air outlet pipe 72 through threads;

referring to fig. 4, the openable and closable sealing glass 11 is installed in the middle of one side of the upper cabinet 31 far from the air inlet 1, the openable and closable sealing glass 11 is directly inserted into the side of the upper cabinet 31, the openable and closable sealing glass 11 and the side insertion hole of the upper cabinet 31 should be in interference fit, the four sides of the openable and closable sealing glass 11 are all provided with sealing rings, and the outer surface of the openable and closable sealing glass 11 should be provided with a handle to facilitate the extraction of the openable and closable sealing glass 11;

referring to fig. 1 and 4, a lower cabinet 33 is arranged below the middle cabinet 32, supporting legs 9 are fixed at four corners of the lower surface of the lower cabinet 33, and the lower cabinet 33 and the supporting legs 9 play a supporting role.

The utility model discloses a theory of operation and use flow: when the device is used, a worker inserts a hand into the glove 5 to operate, the negative pressure fan 7 works at the same time, the negative pressure fan 7 draws air from the interior of the middle cabinet 32 through the air inlet pipe 71, the air flow passes through the air duct 321, and then the polluted air is sent into the interior of the pollutant collecting device 8 through the air outlet pipe 72, the cubic HEPA filter layer 82 can filter out pollutants and collect the pollutants into the cavity of the cube, and then the air flow filtered by the cubic HEPA filter layer 82 enters the interior of the positive pressure area 10, is secondarily filtered by the second HEPA filter layer 6 and finally escapes from the upper opening 311;

but use behind this device for a long time the accessible open switch sealing glass 11, tear pollutant collection device 8 open, more renew can.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a biosafety cabinet that leakproofness is good, includes the cabinet body (3), its characterized in that: the cabinet body (3) comprises a middle cabinet (32), an upper cabinet (31) is arranged above the middle cabinet (32), inclined glass (4) is arranged on the front surface of the middle cabinet (32) in a sealing mode, an air inlet (1) is formed in a position, close to the upper side, of one side of the middle cabinet (32), a first HEPA filter layer (2) is arranged inside the air inlet (1), a protruding cabinet (34) is arranged on the rear surface of the upper cabinet (31) and the rear surface of the middle cabinet (32), a negative pressure channel (341) is arranged inside the protruding cabinet (34), a negative pressure fan (7) is arranged inside the upper cabinet (31), a pollutant collecting device (8) is detachably arranged at the end of an air outlet pipe (72) of the negative pressure fan (7), the pollutant collecting device (8) comprises an aluminum alloy support (81) and a cube-shaped HEPA filter layer (82), the cube-shaped HEPA filter layer (82) is arranged inside the aluminum alloy support (81), but go up cabinet (31) and keep away from one side mid-mounting of air intake (1) and switch sealing glass (11).

2. The biosafety cabinet with good sealing performance according to claim 1, wherein: a lower cabinet (33) is arranged below the middle cabinet (32), and supporting legs (9) are fixed at four corners of the lower surface of the lower cabinet (33).

3. The biosafety cabinet with good sealing performance according to claim 1, wherein: two side-by-side gloves (5) are arranged on the glass (4).

4. The biosafety cabinet with good sealing performance according to claim 1, wherein: the aluminum alloy support (81) is a cubic frame, one side of the cubic HEPA filter layer (82) is provided with an internal thread cylinder (83), and the internal thread cylinder (83) is rotatably connected with the air outlet pipe (72) through threads.

5. The biosafety cabinet with good sealing performance according to claim 1, wherein: the inside top of going up cabinet (31) is provided with second HEPA filter layer (6), and goes up the upper surface of cabinet (31) and seted up upper shed (311), and the region between the bottom surface under the lower surface of second HEPA filter layer (6) and the inside of last cabinet (31) sets up to positive pressure district (10).

6. The biosafety cabinet with good sealing performance according to claim 1, wherein: an air duct (321) is formed in the rear surface of the middle cabinet (32), and an air inlet pipe (71) of the negative pressure fan (7) is inserted into the negative pressure channel (341).