CN210675231U

CN210675231U - Biological safety cabinet

Info

Publication number: CN210675231U
Application number: CN201920911735.8U
Authority: CN
Inventors: 刘伟峰; 胥麟毅
Original assignee: Daer Guangzhou Biotechnology Co ltd
Current assignee: Daer Guangzhou Biotechnology Co ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-06-05
Anticipated expiration: 2029-06-17

Abstract

The utility model relates to the technical field of safety cabinets, and provides a biological safety cabinet which comprises a frame body and a first filter, wherein the frame body comprises a containing cavity, the containing cavity is separated by the first filter to form a purifying space and a polluted space, and the polluted space is positioned above the purifying space; the purification space is communicated with the polluted space through an air flow pipeline, and a fan for driving air flow to flow from the purification space to the polluted space is arranged in the air flow pipeline; the air inlet of the air flow pipeline is communicated with the bottom end of the purification space, the air outlet of the air flow pipeline is communicated with the pollution space, and the air flow direction output by the air outlet is in the horizontal direction. Because the air flow direction that the air outlet of the air flow pipeline is output to the polluted space is the horizontal direction, the purified space is positioned below the polluted space, and the air flow in the horizontal direction can not generate local impact in the vertical direction, so that the air in the polluted space can enter the purified space through the first filter more uniformly.

Description

Biological safety cabinet

Technical Field

The utility model belongs to the technical field of the safety cabinet, more specifically say, relate to a biological safety cabinet.

Background

The biological safety cabinet plays an important role in modern biological experiment/production, and generally comprises a purification space (in which an object to be tested is placed) and a polluted space, wherein polluted gas in the purification space is conveyed to the polluted space, then the gas in the polluted space is filtered and injected into the purification space again, however, the gas flow injected into the purification space from the polluted space is generally uneven, and the experiment/production in the purification space is seriously influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a biological safety cabinet to solve the technical problem that the polluted space who exists injects into the inhomogeneous serious influence of air current that purifies the space and purifies the experiment/production in the space.

In order to achieve the above object, the utility model adopts the following technical scheme: the biological safety cabinet comprises a frame body and a first filter, wherein the frame body comprises an accommodating cavity which is partitioned by the first filter to form a purification space and a polluted space, and the polluted space is positioned above the purification space; the purification space is communicated with the polluted space through an airflow pipeline, and a fan for driving airflow to flow from the purification space to the polluted space is arranged in the airflow pipeline; the air inlet of the air flow pipeline is communicated with the bottom end of the purification space, the air outlet of the air flow pipeline is communicated with the pollution space, and the air flow direction output by the air outlet is the horizontal direction.

Further, the purification space and the pollution space are cuboids respectively, and the top area of the purification space and the bottom area of the pollution space are the same.

Further, the airflow output direction of the fan is the same as the extending direction of the airflow pipeline at the fan.

Furthermore, the airflow pipeline is provided with at least one bent part, and each bent part is provided with an air deflector for guiding airflow to flow along the airflow pipeline.

Further, the air deflector is a flat plate or an arc-shaped plate.

Further, the bottom of the purification space is provided with an air inlet communicated with the external space.

Further, an exhaust port is formed in the top of the polluted space, and a second filter is arranged on the exhaust port.

Further, the first filter is a high efficiency filter; and/or the second filter is a high efficiency filter.

Further, the first filter has a filtration rating of H14 or greater; the second filter has a filtration rating of H14 or greater.

Further, in the contaminated space, a ratio of a flow rate of gas discharged through the gas discharge port to a flow rate of gas introduced into the purified space through the first filter is 3: 7.

furthermore, the air purifier also comprises a fan box with an air inlet hole, wherein the fan is fixed on the fan box, and the linear distance between the air inlet hole and the purification space is 200-400 mm.

Further, the accommodating cavity is a cuboid, and the distance between each point on the top surface of the polluted space and the second filter is consistent.

The utility model provides a biosafety cabinet's beneficial effect lies in: compared with the prior art, the biological safety cabinet provided by the utility model has the advantages that the object is placed in the purification space, in the working process of the fan, the gas in the purification space enters the gas flow pipeline from the bottom of the purification space through the gas inlet of the gas flow pipeline, and the gas entering the gas flow pipeline is injected into the polluted space from the gas outlet of the gas flow pipeline after passing through the fan; the gas reaching the polluted space is filtered by the first filter and then is injected into the purification space again from the top of the purification space so as to realize the circular purification of the gas; namely, the top of the purification space continuously receives the airflow filtered by the first filter, and the gas polluted by the objects in the purification space is continuously output from the air inlet of the airflow pipeline; because the air flow direction that the air outlet of the air flow pipeline is output to the polluted space is the horizontal direction, the purified space is positioned below the polluted space, and the air flow in the horizontal direction can not generate local impact in the vertical direction, so that the air in the polluted space can enter the purified space through the first filter more uniformly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic diagram of a schematic structural principle of a front view cross section of a biosafety cabinet provided by an embodiment of the present invention;

fig. 2 is a schematic diagram of a left-side view sectional structure of a biosafety cabinet according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1-a frame body; 11-a containment chamber; 111-a clean space; 112-a contaminated space; 12-an air inlet; 13-an exhaust port; 2-an air flow duct; 21-bending part; 22-a wind deflector; 3, a fan; 41-a first filter; 42-second filter.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and 2 together, the bio-safety cabinet provided by the present invention will now be described. The biological safety cabinet comprises a frame body 1 and a first filter 41, wherein the frame body 1 comprises an accommodating cavity 11, the accommodating cavity 11 is divided by the first filter 41 to form a purifying space 111 and a polluted space 112, and the polluted space 112 is positioned above the purifying space 111; the purification space 111 and the pollution space 112 are communicated through an air flow pipeline 2, and a fan 3 for driving air flow to flow from the purification space 111 to the pollution space 112 is arranged in the air flow pipeline 2; the air inlet of the air flow pipeline 2 is communicated with the bottom end of the purification space 111, the air outlet of the air flow pipeline 2 is communicated with the pollution space 112, and the air flow direction output by the air outlet is a horizontal direction.

Thus, the object is placed in the purification space 111, and in the working process of the fan 3, the gas in the purification space 111 enters the gas flow pipeline 2 from the bottom of the purification space 111 through the gas inlet of the gas flow pipeline 2, and the gas entering the gas flow pipeline 2 is injected into the polluted space 112 from the gas outlet of the gas flow pipeline 2 after passing through the fan 3; the gas reaching the polluted space 112 is filtered by the first filter 41 and then injected into the purified space 111 from the top of the purified space 111 again to realize the circular purification of the gas; that is, the top of the purification space 111 continuously receives the airflow filtered by the first filter 41, and the gas polluted by the objects in the purification space 111 is continuously output from the air inlet of the airflow pipeline 2; because the direction of the air flow output to the polluted space 112 from the air outlet of the air flow pipeline 2 is horizontal, the purified space 111 is located below the polluted space 112, and the air flow in the horizontal direction does not generate local impact in the vertical direction, so that the air in the polluted space 112 can enter the purified space 111 through the first filter 41 more uniformly.

Further, referring to fig. 1 and fig. 2, as a specific embodiment of the biosafety cabinet provided by the present invention, the purification space 111 and the contaminated space 112 are cuboids, respectively, and the top area of the purification space 111 is the same as the bottom area of the contaminated space 112. In this way, the gas in the contaminated space 112 can be more uniformly introduced into the purified space 111.

Optionally, in one embodiment, purge space 111 is 940mm long, 650mm wide, and 650mm high. The air flow velocity at a position 300mm from the bottom surface of the purification space 111 was as follows (one vertex of the top view of the purification space 111 was the origin, the first row was the X coordinate (the longitudinal direction of the cross section of the purification space 111), the first column was the Y coordinate (the width direction of the cross section of the purification space 111), and the numerical value corresponding to each coordinate was the air flow velocity in meters/second)

	150mm	257mm	364mm	471mm	578mm	685mm	792mm
								150mm	0.34	0.37	0.35	0.34	0.37	0.4	0.43
267mm	0.35	0.34	0.31	0.34	0.36	0.36	0.39
								384mm	0.35	0.35	0.34	0.33	0.35	0.38	0.42
501mm	0.35	0.36	0.35	0.37	0.36	0.37	0.39

Specifically, in one embodiment, the average of the airflow velocities at each location is 0.3614m/s and the maximum value of the airflow velocities at each location is 0.45m/s at the table coordinate locations. Specifically, in one embodiment, the minimum value of the airflow velocity at each location is 0.29 m/s. Specifically, in one embodiment, the relative standard deviation of the air flow velocities at each location is 7.29%.

Further, please refer to fig. 1 and fig. 2, as a specific embodiment of the biosafety cabinet provided by the present invention, the airflow output direction of the fan 3 is the same as the extending direction of the airflow pipeline 2 at the fan 3. In this way, the airflow output by the fan 3 can flow along the airflow pipeline 2 more efficiently; in addition, the turbulent flow generated by the wind output by the fan 3 due to the impact on the airflow pipeline 2 is also reduced.

Further, referring to fig. 1 and fig. 2, as a specific embodiment of the biosafety cabinet provided by the present invention, the airflow duct 2 has at least one bending portion 21, and each bending portion 21 is provided with an air deflector 22 for guiding the airflow to flow along the airflow duct 2. Thus, the extending direction of the airflow pipeline 2 is adjusted through the bent part 21; the air flow at the bent portion 21 can flow along the air flow duct 2 more smoothly under the guidance of the air deflector 22.

Further, referring to fig. 1 and 2, as a specific embodiment of the biosafety cabinet of the present invention, the air guiding plate 22 is a flat plate or an arc plate.

Further, referring to fig. 1 and fig. 2, as a specific embodiment of the biosafety cabinet provided by the present invention, an air inlet 12 communicated with an external space is disposed at the bottom of the purification space 111. In this way, the outside air can be supplied into the clean space 111 through the intake vent 12.

Further, referring to fig. 1 and 2, as a specific embodiment of the biosafety cabinet provided by the present invention, an exhaust port 13 is opened at the top of the contaminated space 112, and the exhaust port 13 is provided with a second filter 42. In this way, the gas in the contaminated space 112 can be exhausted from the exhaust port 13 through the second filter 42, thereby avoiding environmental pollution.

Further, referring to fig. 1 and fig. 2, as a specific embodiment of the biosafety cabinet provided by the present invention, the first filter 41 is a high efficiency filter; and/or the second filter 42 is a high efficiency filter. Optionally, in one embodiment, the high efficiency filter: a filter capable of collecting particulate dust and various suspended matters of 0.5um or less. Optionally, in one embodiment, the high efficiency filter uses ultrafine glass fiber paper as a filter material, and the materials such as plywood paper and aluminum foil are folded to form a partition plate, and the partition plate is sealed by polyurethane sealant and made of a galvanized plate, a stainless steel plate and an aluminum alloy section as outer frames.

Further, referring to fig. 1 and fig. 2, as a specific embodiment of the biosafety cabinet provided by the present invention, the filtration grade of the first filter 41 is above H14; the second filter 42 has a filtration rating of H14 or greater.

Further, referring to fig. 1 and 2, as an embodiment of the biosafety cabinet provided by the present invention, in the contaminated space 112, the ratio of the air flow discharged through the air outlet 13 to the air flow entering the purified space 111 through the first filter 41 is 3: 7. in this way, most of the gas in the polluted space 112 is circulated into the purified space 111 for further use.

Further, in one embodiment, the biosafety cabinet employs a backward inclined radial fan, and the fan 3 is fixed to a fan box (not shown) having an air inlet opening at a linear distance of 200mm to 400mm from the working area (working area: decontamination space 111).

Further, in one embodiment, the receiving chamber 11 is a rectangular parallelepiped, and the distances between the points on the top surface of the contaminated space 112 and the second filter 42 are the same.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Biological safety cabinet, including support body and first filter, the support body is including holding the chamber, its characterized in that: the accommodating cavity is divided by the first filter to form a purifying space and a polluted space, and the polluted space is positioned above the purifying space; the purification space is communicated with the polluted space through an airflow pipeline, and a fan for driving airflow to flow from the purification space to the polluted space is arranged in the airflow pipeline; the air inlet of the air flow pipeline is communicated with the bottom end of the purification space, the air outlet of the air flow pipeline is communicated with the pollution space, and the air flow direction output by the air outlet is the horizontal direction.

2. The biosafety cabinet according to claim 1, wherein: the purifying space and the polluted space are cuboids respectively, and the top area of the purifying space is the same as the bottom area of the polluted space.

3. The biosafety cabinet according to claim 1, wherein: the airflow output direction of the fan is the same as the extending direction of the airflow pipeline at the fan.

4. The biosafety cabinet according to claim 1, wherein: the airflow pipeline is provided with at least one bent part, and each bent part is respectively provided with an air deflector for guiding airflow to flow along the airflow pipeline.

5. The biosafety cabinet according to claim 4, wherein: the air deflector is a flat plate or an arc-shaped plate.

6. The biosafety cabinet according to claim 1, wherein: and an air inlet communicated with the external space is formed in the bottom of the purification space.

7. The biosafety cabinet according to any of claims 1 to 6, wherein: an exhaust port is formed in the top of the polluted space, and a second filter is arranged on the exhaust port.

8. The biosafety cabinet according to claim 7, wherein: the first filter is a high-efficiency filter; and/or the second filter is a high efficiency filter.

9. The biosafety cabinet according to claim 8, wherein: the first filter has a filtration rating of H14 or greater; the second filter has a filtration rating of H14 or greater.

10. The biosafety cabinet according to claim 7, wherein: in the contaminated space, the ratio of the flow rate of gas discharged through the gas discharge port to the flow rate of gas entering the purified space through the first filter is 3: 7.

11. the biosafety cabinet according to claim 1, wherein: the air purifier also comprises a fan box with an air inlet hole, wherein the fan is fixed on the fan box, and the linear distance between the air inlet hole and the purification space is 200-400 mm.

12. The biosafety cabinet according to claim 7, wherein: the accommodating cavity is a cuboid, and the distance between each point on the top surface of the polluted space and the second filter is consistent.