CN219186959U - Biological safety cabinet capable of adjusting air quantity - Google Patents
Biological safety cabinet capable of adjusting air quantity Download PDFInfo
- Publication number
- CN219186959U CN219186959U CN202320117376.5U CN202320117376U CN219186959U CN 219186959 U CN219186959 U CN 219186959U CN 202320117376 U CN202320117376 U CN 202320117376U CN 219186959 U CN219186959 U CN 219186959U
- Authority
- CN
- China
- Prior art keywords
- adjusting plate
- air
- adjusting
- plate
- air inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Ventilation (AREA)
- Air-Flow Control Members (AREA)
Abstract
The utility model belongs to the technical field of electric appliances, concretely relates to biological safety cabinet of adjustable amount of wind, including bellows and fan, set up on the bellows with the first gas inlet that the air outlet of fan is connected, still including installing first regulating plate, second regulating plate and the elasticity regulating part in the bellows, first regulating plate with the second regulating plate rotates to be connected, in order to first regulating plate with form the regulation chamber between the second regulating plate, be provided with on the regulation chamber with the second gas inlet just to first gas inlet, just the lateral wall of first gas inlet with form the gas inlet and get into between first regulating plate, the second regulating plate the air inlet gap of bellows. The elastic adjusting piece is connected with the first adjusting plate and the second adjusting plate; the biological safety cabinet with the adjustable air quantity can automatically adjust the size of the second air inlet, change the wind resistance of the air outlet of the fan and adjust the air quantity of the fan.
Description
Technical Field
The application belongs to the technical field of biological experiment equipment, and particularly relates to a biological safety cabinet capable of adjusting air quantity.
Background
When the biosafety cabinet is used, air is mainly introduced into the bellows through the fan, and then filtered by the filter to enter the working area or leave the biosafety cabinet.
The fan used by the biosafety cabinet is basically a single alternating current fan, when the voltage of a laboratory is unstable, the input voltage of the fan is also unstable, so that the rotating speed of the fan fluctuates, the air output of the fan is large and small, and accordingly the descending air flow and the inflow air flow of the biosafety cabinet can fluctuation, and personnel protection, product protection and cross infection protection of the biosafety cabinet are affected.
Currently, for this problem, a thyristor is generally added to keep the input voltage or rotation speed of the fan stable. However, when the silicon controlled rectifier is used, a sensor is needed to feed back, such as a voltage sensor, a wind speed sensor and the like, so that the silicon controlled rectifier has a plurality of parts and is complex in overall structure and control.
Disclosure of Invention
The application provides a biological safety cabinet with adjustable air quantity to solve the inconvenient problem of current biological safety cabinet fan air output adjustment.
The technical scheme adopted by the application is as follows:
the biosafety cabinet comprises an air box and a fan, wherein a first gas inlet connected with an air outlet of the fan is formed in the air box;
the air inlet device comprises an air box, and is characterized by further comprising a first adjusting plate, a second adjusting plate and an elastic adjusting piece which are arranged in the air box, wherein the first adjusting plate is connected with the second adjusting plate in a rotating mode, an adjusting cavity is formed between the first adjusting plate and the second adjusting plate, a second air inlet opposite to the first air inlet is formed in the adjusting cavity, an air inlet gap for air to enter the air box is formed between the side wall of the first air inlet and the first adjusting plate and between the side wall of the first air inlet and the second adjusting plate, and the elastic adjusting piece is connected with the first adjusting plate and the second adjusting plate so as to adjust the size of the second air inlet according to the change of the air pressure of an air outlet of the fan.
In one possible design, the elastic adjustment member includes a second spring fixed between the first adjustment plate and the side wall of the bellows and a third spring fixed between the second adjustment plate and the side wall of the bellows.
In one possible design, the elastic adjustment member comprises a first spring located between the first adjustment plate and the second adjustment plate.
In one possible design, the length direction of the first adjusting plate and the length direction of the second adjusting plate are parallel or perpendicular to the air inlet direction of the bellows.
In one possible design, the length direction of the first adjusting plate and the second adjusting plate is parallel to the air inlet direction of the bellows, and the elastic adjusting member further comprises a limiting member for keeping the second air inlet opposite to the first air inlet.
In one possible design, a rotating shaft is arranged in the bellows, and the first adjusting plate and the second adjusting plate are both rotationally connected with the rotating shaft.
In one possible design, the pivot with bellows fixed connection, the locating part is including being located first locating lever between the first regulating plate with the second regulating plate, first locating lever with the air inlet direction of bellows is parallel, be provided with on the first locating lever with first locating lever sliding connection's sliding sleeve, articulated on the sliding sleeve have first regulation pole, second regulation pole, one adjust pole with first regulating plate articulates, the second adjust pole with the second regulating plate articulates, first spring housing is established on the first locating lever, just first spring one end with the sliding sleeve is connected, the other end with first locating lever is connected.
In one possible design, the limiting member includes a second positioning rod, the second positioning rod extends along the vertical direction of the bellows and is fixedly connected with the bellows, the first adjusting plate and the second adjusting plate are close to one end of the first gas inlet and are slidably connected with the second positioning rod, the rotating shaft can move along the direction of the second positioning rod, one end of the first spring is connected with the first adjusting plate, and the other end of the first spring is connected with the second adjusting plate.
In one possible design, a sliding groove which coincides with the moving track of the rotating shaft is arranged on the side wall of the air box, and the rotating shaft is in sliding connection with the sliding groove.
In one possible design, the adjustment chamber is of V-shaped configuration.
The beneficial effects of this application: the biological safety cabinet with the adjustable air quantity comprises a first adjusting plate, a second adjusting plate and an elastic adjusting piece, wherein the first adjusting plate and the second adjusting plate are connected in a rotating mode to form an adjusting cavity, a second air inlet on the adjusting cavity is opposite to a first air inlet on an air box, an air inlet gap is formed between the adjusting cavity and the air box wall, when the voltage of a fan is increased, the air quantity of an air outlet of the fan is correspondingly increased when the rotating speed of the fan is increased, the pressure borne by the first adjusting plate and the second adjusting plate is increased, so that the first adjusting plate and the second adjusting plate are moved, the second air inlet is increased, the air inlet gap is reduced, the air outlet resistance of the fan is increased, and finally the air quantity of an air outlet of the fan is reduced, so that the air quantity is effectively adjusted; when the voltage of the secondary fan is reduced and the rotating speed of the fan is reduced, the air quantity of the air outlet of the fan is correspondingly reduced, the first adjusting plate and the second adjusting plate move under the action of the elastic adjusting piece, so that the size of the second air inlet is reduced, the air inlet gap is enlarged, the air resistance of the air outlet of the fan is reduced, the air quantity of the fan is enlarged, and the air quantity is effectively adjusted; in addition, the air outlet quantity of the fan is effectively regulated, and meanwhile, the proportion relation between the descending air flow and the inflow air flow is not changed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic view of a first use state structure of a biosafety cabinet according to an embodiment of the disclosure;
FIG. 2 is a schematic view of a second usage state structure of the biosafety cabinet according to an embodiment of the disclosure;
FIG. 3 is a first embodiment of a resilient adjustment member of a biosafety cabinet provided in accordance with an embodiment of the application;
FIG. 4 is a second embodiment of a resilient adjustment member of a biosafety cabinet provided in accordance with an embodiment of the application;
FIG. 5 is a third embodiment of an elastic adjustment member of a biosafety cabinet provided in accordance with an embodiment of the application;
fig. 6 is a fourth embodiment of an elastic adjustment member of a biosafety cabinet provided in an embodiment of the application.
Reference numerals:
100-bellows, 200-fan, 300-first gas inlet, 400-air inlet gap, 501-first regulating plate, 502-second regulating plate, 503-regulating cavity, 504-second gas inlet, 505-rotating shaft, 601-second spring, 602-second spring, 603-first spring, 604-second positioning rod, 605-first positioning rod, 606-sliding sleeve, 607-first regulating rod, 608-second regulating rod.
Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application, and it is apparent that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein.
In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
The biological safety cabinet basically uses an alternating current fan, and in the use process of the biological safety cabinet, the voltage fluctuation condition can not be avoided, at the moment, the input voltage of the fan can be fluctuated, so that the rotating speed of the fan is changed, the air output of the fan is finally caused to be large and small, the descending air flow and the inflow air flow of the biological safety cabinet can be fluctuated, and the personnel protection, the product protection and the cross infection protection of the safety cabinet are affected
The wind resistance of the traditional biosafety cabinet is basically constant, so that the problem of fan rotation speed fluctuation is basically solved, the problem of complicated installation and control is basically solved by considering the direction of stabilizing the fan rotation speed, for example, the method for stabilizing the fan rotation speed by adopting a silicon controlled rectifier is commonly used at present.
In this application, a new direction is found: the wind resistance of the biosafety cabinet is changed adaptively according to the rotating speed of the fan, so that the fan can adjust the air output of the fan, and the biosafety cabinet is realized only through a simple mechanical structure, so that the biosafety cabinet is high in reliability and extremely simple to use.
Referring to fig. 1 and 2, the biosafety cabinet with adjustable air volume provided in this embodiment is basically identical to the existing biosafety cabinet in structure, and includes a bellows 100, a fan 200, a working area, an air supply filter, an air exhaust filter, and the like, and a first air inlet 300 connected to an air outlet of the fan 200 is provided on the bellows 100.
The present embodiment is different in that it further includes a first regulating plate 501, a second regulating plate 502, and an elastic regulating member installed in the bellows 100.
The first adjusting plate 501 is rotatably connected with the second adjusting plate 502, that is, one end of the first adjusting plate 501 is in contact with one end of the second adjusting plate 502 and is connected with the other end of the first adjusting plate 501 and the other end of the second adjusting plate 502 in a rotating connection manner, an adjusting cavity 503 is formed between the first adjusting plate 501 and the second adjusting plate 502, a second air inlet 504 opposite to the first air inlet 300 is formed on the adjusting cavity 503, an air inlet gap 400 for air entering the bellows 100 is formed between the side wall of the first air inlet 300 and the first adjusting plate 501 and the second adjusting plate 502, and an elastic adjusting piece is connected with the first adjusting plate 501 and the second adjusting plate 502 to adjust the size of the second air inlet 504 according to the wind pressure change of the wind outlet of the fan 200.
Wherein, the first adjusting plate 501 and the second adjusting plate 502 can be connected with the wall of the bellows 100, at this time, the adjusting cavity 503 only has one opening of the second gas inlet 504, and the gas can only enter the bellows 100 from the air inlet gaps 400 at two sides of the adjusting cavity 503; of course, the first adjusting plate 501 and the second adjusting plate 502 may not be connected to the wall of the bellows 100, and at this time, the two ends of the adjusting cavity 503 are also open, so that gas may enter the bellows 100 from the periphery of the adjusting cavity 503, and may be specifically selected according to the actual design situation of the biosafety cabinet.
When the fan 200 is in use, the fan 200 is out of air, and the first adjusting plate 501 and the second adjusting plate 502 are subjected to the combined action of wind pressure and the elastic adjusting piece, so that the fan is in the following two states:
as shown in fig. 1, when the voltage increases, the rotation speed of the blower 200 increases, the air volume of the air outlet of the blower 200 increases, and the second air inlet 504 is opposite to the first air inlet 300, so that the pressures received by the first adjusting plate 501 and the second adjusting plate 502 increase, and the movable ends of the first adjusting plate 501 and the second adjusting plate 502 relatively move, so that the second air inlet 504 increases, the air inlet gap 400 correspondingly decreases, and the air outlet resistance of the blower 200 increases, so that the air volume of the air outlet of the blower 200 decreases;
as shown in fig. 2, when the voltage decreases, the rotation speed of the blower 200 decreases, the air volume of the air outlet of the blower 200 decreases, the positive pressure to the first adjusting plate 501 and the second adjusting plate 502 decreases, the first adjusting plate 501 and the second adjusting plate 502 move under the driving of the elastic adjusting member, the second air inlet 504 decreases, the air inlet gap 400 correspondingly increases, and the air outlet resistance of the blower 200 decreases, thereby increasing the air volume of the air outlet of the blower 200.
The shapes of the first adjusting plate 501 and the second adjusting plate 502 may be arbitrarily set, so long as they can be rotationally connected with each other, and an adjusting cavity 503 may be formed between the first adjusting plate 501 and the second adjusting plate 502, which are exemplary, the first adjusting plate 501 and the second adjusting plate 502 may be all plates with shapes of L-shaped plates, arc-shaped plates, and the like.
Of course, the first adjusting plate 501 and the second adjusting plate 502 may be square plates, at this time, one ends of the first adjusting plate 501 and the second adjusting plate 502 are rotationally connected, the formed adjusting cavity 503 is a V-shaped cavity, and the sides of the first adjusting plate 501 and the second adjusting plate 502 far away from each other may play a role in gradually expanding the air inlet gap 400 and guiding the air into the bellows 100. Of course, an arc-shaped guiding portion may be disposed at one end of the first adjusting plate 501 and the second adjusting plate 502 near the first gas inlet 300, and the gas may be guided from the gas inlet gap 400 into the bellows 100 through the arc-shaped guiding portion.
In addition, the elastic adjusting member may adjust the positions of the first adjusting plate 501 and the second condition plate in various structures or manners.
Illustratively, the elastic adjusting member is a second spring 602601 and a third spring, the second spring 602601 is fixed between the first adjusting plate 501 and the side wall of the bellows 100, the third spring is fixed between the second adjusting plate 502 and the side wall of the bellows 100, that is, one end of the second spring 602601 is fixedly connected to the first adjusting plate 501, the other end is fixedly connected to the side wall of the bellows 100, one end of the third spring is fixedly connected to the second adjusting plate 502, and the other end is fixedly connected to the side wall of the bellows 100.
Specifically, at this time, the first adjusting plate 501 and the second adjusting plate 502 may be vertically or horizontally disposed, one end of the first adjusting plate 501 and one end of the second adjusting plate 502 away from the first gas inlet 300 are hinged or rotationally connected through a rotating shaft 505, and of course, the rotationally connected position of the first adjusting plate 501 and the rotationally connected position of the second adjusting plate 502 are rotationally connected with the wall of the bellows 100, that is, the rotationally connected position of the first adjusting plate 501 and the rotationally connected position of the second adjusting plate 502 relative to the bellows 100 only rotates in the original position, and displacement in the front-back, left-right directions cannot occur, for example, the first adjusting plate 501 and the second adjusting plate 502 are connected through the rotating shaft 505, and at this time, the first adjusting plate 501 and the second adjusting plate 502 are rotationally connected with the rotating shaft 505 and fixedly connected with the wall of the bellows 100, so that the first adjusting plate 501 and the second adjusting plate 502 rotate around the rotating shaft 505 as to change the size of the second gas inlet 504.
If the first adjusting plate 501 and the second adjusting plate 502 are disposed in the bellows 100 along the vertical direction, that is, the length direction of the first adjusting plate 501 and the second adjusting plate 502 is perpendicular to the air inlet direction of the bellows 100, the positions of the first adjusting plate 501 and the second adjusting plate 502 opposite to the side away from the adjusting cavity 503 are the side walls of the bellows 100.
If the length directions of the first adjusting plate 501 and the second adjusting plate 502 extend along the horizontal direction, as shown in fig. 3, the position of the first adjusting plate 501 opposite to the side away from the adjusting cavity 503 is the top of the bellows 100, and the position of the second adjusting plate 502 opposite to the side away from the adjusting cavity 503 is the bottom of the bellows 100.
When the fan 200 is in use, air exhausted from the air outlet of the fan 200 enters the adjusting cavity 503 to generate positive pressure on the first adjusting plate 501 and the second adjusting plate 502, and when the positive pressure is larger than the pushing force generated by the second spring 602601 and the third spring on the first adjusting plate 501 and the second adjusting plate 502, the first adjusting plate 501 and the second adjusting plate 502 can rotate towards the directions away from each other, so that the size of the second air inlet 504 is increased, the wind resistance of the air outlet of the fan 200 is increased, and the air output of the fan 200 is reduced; when the positive pressure is smaller than the pushing force generated by the second spring 602601 and the third spring to the first adjusting plate 501 and the second adjusting plate 502, the first adjusting bar and the second adjusting plate 502 can move towards the directions close to each other, so that the size of the second air inlet 504 is reduced, the wind resistance of the air outlet of the fan 200 is reduced, and the air output of the fan 200 is increased.
Illustratively, the resilient adjustment member includes a first spring 603, the first spring 603 being located between the first adjustment plate 501 and the second adjustment plate 502.
Specifically, the first adjustment plate 501 and the second adjustment plate 502 may be disposed in the vertical or horizontal direction as well.
If the first adjusting plate 501 and the second adjusting plate 502 are both disposed along the vertical direction, as shown in fig. 4, one end of the first adjusting plate 501 and one end of the second adjusting plate 502 away from the first gas inlet 300 are hinged or rotationally connected through the rotating shaft 505, of course, the rotationally connected position of the first adjusting plate 501 and the second adjusting plate 502 is rotationally connected with the wall of the bellows 100, that is, the rotationally connected position of the first adjusting plate 501 and the second adjusting plate 502 is rotated relative to the bellows 100 only in the original position, and displacement in the front-back, left-right directions does not occur, one end of the first spring 603 is fixedly connected with the first adjusting plate 501, and the other end is fixedly connected with the second adjusting plate 502.
If the first adjusting plate 501 and the second adjusting plate 502 are both disposed along the horizontal direction, the following structure may be provided:
1. make first spring 603 one end and first regulating plate 501 fixed connection, the other end and second regulating plate 502 fixed connection, first regulating plate 501, second regulating plate 502 are connected through pivot 505, first regulating plate 501, second regulating plate 502 all rotate with pivot 505 and are connected this moment, pivot 505 and bellows 100 wall fixed connection again, thereby make first regulating plate 501, second regulating plate 502 rotate with pivot 505 as the center of rotation, with the size of change second gas inlet 504, be provided with the track with the movement track coincidence of first regulating plate 501, second regulating plate 502 on the lateral wall of bellows 100 this moment, be provided with on first regulating plate 501, the second regulating plate 502 with track complex sliding part.
When the fan 200 is used, the positions of the first adjusting plate 501 and the second adjusting plate 502 are limited by the rotating shaft 505, and the first adjusting plate 501 and the second adjusting plate 502 move along the track under the action of positive pressure generated by the air outlet of the fan 200 and the first spring 603, so that the second air inlet 504 can be always opposite to the first air inlet 300, the size of the second air inlet 504 can be effectively adjusted according to the air pressure adaptability of the fan 200, and the air outlet of the fan 200 can be effectively adjusted.
2. Referring to fig. 5, one end of the first spring 603 is fixedly connected to the first adjusting plate 501, the other end of the first spring is fixedly connected to the second adjusting plate 502, the first adjusting plate 501 and the second adjusting plate 502 are rotatably connected to one end of the first adjusting plate 501 far away from the first gas inlet 300, and the rotating connection ends of the first adjusting plate 501 and the second adjusting plate 502 can move in the bellows 100, at this time, a limiting member needs to be set to limit the positions of the first adjusting plate 501 and the second adjusting plate 502 in the bellows 100. The limiting part can be 1 or more second positioning rods 604, the second positioning rods 604 are fixedly connected with the bellows 100, meanwhile, a connecting part which is in sliding connection with the second positioning rods 604 is arranged on the first adjusting plate 501, namely, a hole for the second positioning rods 604 to pass through is arranged on the connecting part, and the first adjusting plate 501 and the second adjusting plate 502 move up and down along the second positioning rods 604 under the dual actions of the first spring 603 and the wind pressure of the wind outlet of the fan 200, so that the size of the second gas inlet 504 is adjusted.
Of course, in order to better limit the movement track of the first adjusting plate 501 and the second adjusting plate 502, it is preferable that the first adjusting plate 501 and the second adjusting plate 502 are connected by the rotating shaft 505, at this time, the first adjusting plate 501 and the second adjusting plate 502 both rotate around the rotating shaft 505 as a rotation center, a chute overlapping with the movement track of the rotating shaft 505 is formed in the wall of the bellows 100, and the end of the rotating shaft 505 is engaged with the chute and can move back and forth along the chute.
3. Referring to fig. 6, the first adjusting plate 501 and the second adjusting plate 502 are connected through the rotating shaft 505, at this time, the first adjusting plate 501 and the second adjusting plate 502 are both connected with the rotating shaft 505 in a rotating manner, the rotating shaft 505 is fixedly connected with the wall of the bellows 100, so that the first adjusting plate 501 and the second adjusting plate 502 rotate around the rotating shaft 505 as a rotation center, the size of the second gas inlet 504 is changed, a limiting piece is further arranged in the bellows 100, the limiting piece comprises a first positioning rod 605 located between the first adjusting plate 501 and the second adjusting plate 502, the first positioning rod 605 is parallel to the air inlet direction of the bellows 100, that is, the first positioning rod 605 is arranged along the horizontal direction, and the first positioning rod 605 is fixedly connected with the wall of the bellows 100, meanwhile, a sliding sleeve 606 is arranged on the first positioning rod 605 and is in sliding connection with the first positioning rod 605, a first adjusting rod 607 and a second adjusting rod 608 are hinged to the first adjusting plate 501, the second adjusting rod 608 is hinged to the second adjusting plate 502, a first spring 603 is sleeved on the first positioning rod 603, and the first spring 605 is further arranged on one side of the first positioning rod 603, and the other side of the first positioning rod 605 can be connected with the first positioning rod 605 and the first positioning rod is further away from the first positioning rod 505, and the first positioning rod 605 can be connected with the first positioning rod is further arranged on the first positioning rod 505, and the sliding sleeve is in sliding connection with the sliding sleeve 605.
Taking the example that the first spring 603 is arranged at one side of the sliding sleeve 606 far away from the rotating shaft 505, when the fan 200 is used, if the positive pressure given by the air outlets of the fans 200 received by the first adjusting plate 501 and the second adjusting plate 502 is larger than the acting force given by the first spring 603, the first adjusting plate 501 and the second adjusting plate 502 can rotate towards the direction far away from each other, so that the size of the second air inlet 504 is enlarged, the air resistance of the air outlet of the fan 200 is increased, the sliding sleeve 606 moves towards the direction close to the rotating shaft 505, the first spring 603 is stretched, the rotating speed of the fan 200 is reduced, the sliding sleeve 606 moves towards the direction far away from the rotating shaft 505 under the action of the first spring 603 when the positive pressure is smaller than the acting force of the first spring 603, and the first adjusting plate 607 and the second adjusting plate 608 drive the first adjusting plate 501 and the second adjusting plate 502 to move towards the direction close to each other, so that the size of the second air inlet 504 is reduced, the air resistance of the air outlet of the fan 200 is reduced, and the air outlet is adjusted.
While the present application has been described in connection with the preferred embodiments illustrated in the accompanying drawings, it will be readily understood by those skilled in the art that the scope of the application is not limited to such specific embodiments, and the above examples are intended to illustrate the technical aspects of the application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The biosafety cabinet with adjustable air quantity comprises an air box and a fan, wherein a first air inlet connected with an air outlet of the fan is formed in the air box, and the biosafety cabinet is characterized by further comprising a first adjusting plate, a second adjusting plate and an elastic adjusting piece which are arranged in the air box, wherein the first adjusting plate is rotationally connected with the second adjusting plate so as to form an adjusting cavity between the first adjusting plate and the second adjusting plate, a second air inlet opposite to the first air inlet is formed in the adjusting cavity, and an air inlet gap for air to enter the air box is formed between the side wall of the first air inlet and the first adjusting plate and between the side wall of the first air inlet and the second adjusting plate; the elastic adjusting piece is connected with the first adjusting plate and the second adjusting plate, so that the size of the second gas inlet is adjusted according to the wind pressure change of the air outlet of the fan.
2. The variable air volume biosafety cabinet according to claim 1, wherein the elastic regulating member includes a second spring and a third spring, the second spring being fixed between the first regulating plate and a side wall of the bellows, the third spring being fixed between the second regulating plate and a side wall of the bellows.
3. The variable air volume biosafety cabinet of claim 1 wherein said resilient adjustment member includes a first spring positioned between said first adjustment plate and said second adjustment plate.
4. A biosafety cabinet with adjustable air volume according to claim 2 or 3, wherein the length direction of the first adjusting plate and the length direction of the second adjusting plate are parallel or perpendicular to the air inlet direction of the bellows.
5. The biosafety cabinet with adjustable air volume according to claim 3, wherein the length direction of the first adjusting plate and the second adjusting plate is parallel to the air inlet direction of the bellows, and the elastic adjusting member further comprises a limiting member for keeping the second air inlet opposite to the first air inlet.
6. The biosafety cabinet with adjustable air quantity according to claim 5, wherein a rotating shaft is arranged in the air box, and the first adjusting plate and the second adjusting plate are both in rotating connection with the rotating shaft.
7. The biosafety cabinet with adjustable air quantity according to claim 6, wherein the rotating shaft is fixedly connected with the air box, the limiting piece comprises a first positioning rod located between the first adjusting plate and the second adjusting plate, the first positioning rod is parallel to the air inlet direction of the air box, a sliding sleeve which is slidably connected with the first positioning rod is arranged on the first positioning rod, a first adjusting rod and a second adjusting rod are hinged on the sliding sleeve, the first adjusting rod is hinged with the first adjusting plate, the second adjusting rod is hinged with the second adjusting plate, the first spring is sleeved on the first positioning rod, one end of the first spring is connected with the sliding sleeve, and the other end of the first spring is connected with the first positioning rod.
8. The biosafety cabinet with adjustable air volume according to claim 6, wherein the limiting piece comprises a second positioning rod, the second positioning rod extends along the vertical direction of the air box and is fixedly connected with the air box, one ends of the first adjusting plate and the second adjusting plate, which are close to the first air inlet, are both in sliding connection with the second positioning rod, the rotating shaft can move along the direction which is close to or far away from the second positioning rod, one end of the first spring is connected with the first adjusting plate, and the other end of the first spring is connected with the second adjusting plate.
9. The biosafety cabinet with adjustable air quantity according to claim 8, wherein a chute which coincides with a moving track of the rotating shaft is arranged on a side wall of the air box, and the rotating shaft is connected with the chute in a sliding manner.
10. The air volume adjustable biosafety cabinet according to claim 1, wherein said adjusting chamber is of a V-shaped configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320117376.5U CN219186959U (en) | 2023-01-13 | 2023-01-13 | Biological safety cabinet capable of adjusting air quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320117376.5U CN219186959U (en) | 2023-01-13 | 2023-01-13 | Biological safety cabinet capable of adjusting air quantity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219186959U true CN219186959U (en) | 2023-06-16 |
Family
ID=86720680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320117376.5U Active CN219186959U (en) | 2023-01-13 | 2023-01-13 | Biological safety cabinet capable of adjusting air quantity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219186959U (en) |
-
2023
- 2023-01-13 CN CN202320117376.5U patent/CN219186959U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203859028U (en) | Microswitch | |
| CN219186959U (en) | Biological safety cabinet capable of adjusting air quantity | |
| CN203744726U (en) | Furnace door control mechanism | |
| CN213628052U (en) | Constant power control valve of hydraulic oil pump | |
| CN211233146U (en) | Constant temperature and humidity machine | |
| CN201090765Y (en) | Holder type aperture plate flow regulating valve | |
| CN112718705A (en) | Radiating equipment of dust removal for internet peripheral hardware | |
| CN209638054U (en) | A kind of energy conservation and environmental protection axial flow blower | |
| CN111779564A (en) | Thermostat capable of realizing side bypass sealing | |
| CN205000428U (en) | Adjustable hydraulic pressure flashing valve | |
| CN113389719B (en) | Air compressor machine admission valve with adjustable | |
| CN205805953U (en) | A kind of aerator that can accurately adjust wind direction | |
| CN215332212U (en) | Sliding support hinge | |
| CN201321998Y (en) | Alternating current fan speed regulator | |
| CN208907680U (en) | A kind of movable air outlet structure of mobile air-conditioner and its mobile air-conditioner | |
| CN109185989B (en) | Household air temperature intelligent control device | |
| CN112079063A (en) | Dry quenching rotary seal valve | |
| CN212163867U (en) | Intelligent valve controller | |
| CN213752530U (en) | Pressure type temperature controller acceleration driving device | |
| CN109441880A (en) | The wind shielding structure of electric fan | |
| CN214946744U (en) | Adjustable gas inlet proportional control pressure stabilizing valve | |
| CN210624724U (en) | Fan coil and air conditioning system | |
| CN215763494U (en) | Pressure reducing valve capable of conveniently adjusting pressure | |
| CN220734661U (en) | Tuyere assembly and electric hair drier | |
| CN212775646U (en) | Pressure valve body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |