CN213350128U - Novel fume chamber of amount of wind adjustable - Google Patents
Novel fume chamber of amount of wind adjustable Download PDFInfo
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- CN213350128U CN213350128U CN202022238579.9U CN202022238579U CN213350128U CN 213350128 U CN213350128 U CN 213350128U CN 202022238579 U CN202022238579 U CN 202022238579U CN 213350128 U CN213350128 U CN 213350128U
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Abstract
The utility model relates to a novel ventilation cabinet with adjustable air volume, wherein the cabinet body comprises a lower storage area and an upper experimental area, the front side of the upper experimental area is provided with a liftable transparent cabinet door, and the cabinet body is provided with a displacement sensor for detecting the opening height of the transparent cabinet door; the air outlet pipe is provided with a pitot tube sensor, a butterfly valve and a butterfly valve actuating mechanism, the top of the cabinet body is also provided with a controller, and the controller controls the opening angle of the butterfly valve through the actuating mechanism according to detection signals of the displacement sensor and the pitot tube sensor. The novel fume chamber of amount of wind adjustable in this application, the controller can calculate current air output according to the air flow rate that pitot tube sensor surveyed and the sectional area of outlet duct, and the actual required amount of wind of fume chamber can be calculated according to the opening height of transparent cabinet door to the controller, then adjusts the air output of fume chamber through the angle of actuating mechanism regulation butterfly valve's valve block, can adjust the amount of wind of fume chamber according to the opening size of transparent cabinet door from this.
Description
Technical Field
The utility model belongs to the technical field of the fume chamber technique and specifically relates to a novel fume chamber of amount of wind adjustable.
Background
The fume hood is an indispensable important device in a biochemical laboratory, can discharge harmful gas generated in an experiment, and ensures the life safety of experimenters; the performance of the fume hood is mainly determined by the speed of air flow (air flow) in the fume hood. For example, chinese patent document CN209879024U discloses a "detecting device for foreign matter in a window of a ventilation cabinet and a ventilation cabinet", which eliminates the original blind areas detected on both sides and controls the lifting of an automatic window and the operation of a fan of the ventilation cabinet by detecting foreign matter, compared with the conventional detecting device for foreign matter. The fume hood disclosed in the document has the problem that the air quantity is not adjustable and the automatic window is unreliable in lifting, so that improvement is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel fume chamber of amount of wind adjustable for solve the current fume chamber amount of wind problem of can not adjusting.
In order to solve the problems, the utility model provides a novel ventilation cabinet with adjustable air volume, the cabinet body comprises a lower storage area and an upper experimental area, the upper side of the cabinet body is provided with an air outlet pipe communicated with the upper experimental area, the front side of the upper experimental area is provided with a transparent cabinet door capable of being lifted, and the cabinet body is provided with a displacement sensor for detecting the opening height of the transparent cabinet door; the air outlet pipe is provided with a pitot tube sensor, the cabinet body is further provided with a butterfly valve at the joint of the air outlet pipe, an actuating mechanism for controlling the opening angle of the butterfly valve is arranged outside a valve body of the butterfly valve, the top of the cabinet body is further provided with a controller, the controller is connected with a displacement sensor, the pitot tube sensor and the actuating mechanism in an electrical mode, and the controller is used for controlling the opening angle of the butterfly valve according to the displacement sensor and the detection signal of the pitot tube sensor.
The utility model provides a novel fume chamber of amount of wind adjustable still has following technical characteristic:
further, still be equipped with the control on the cabinet body the elevating system that the transparent cabinet door goes up and down, elevating system includes drive chain, elevator motor and counterweight plate, drive chain's one end with the upside of transparent cabinet door links to each other, drive chain's the other end with the upside of counterweight plate links to each other, elevator motor passes through drive chain drive transparent cabinet door rises or descends.
Furthermore, a first guide groove is formed in the front side of the cabinet body, the transmission chain penetrates through the first guide groove, and a vertical opening for avoiding the transparent cabinet door is further formed in the first guide groove; the rear side of the cabinet body is provided with a second guide rail, and the side edge of the counterweight plate is provided with a guide slide block matched with the second guide rail.
Furthermore, a first rotating shaft is arranged on the front side of the top of the cabinet body, a second rotating shaft is arranged on the rear side of the top of the cabinet body, transmission fluted discs are respectively fixed at two ends of the first rotating shaft and the second rotating shaft, and the transmission chain is meshed with the transmission fluted discs; the end part of the first rotating shaft is also provided with a transmission gear, and the lifting motor drives the first rotating shaft to rotate through the rack conveyor belt and the transmission gear.
Further, a hanging rack is further installed on the rear wall of the upper experiment area.
Further, the cabinet body is also provided with a monitoring screen connected with the controller.
The utility model discloses following beneficial effect has: through setting up the displacement sensor who detects transparent cabinet door opening height, set up pitot tube sensor and the butterfly valve that has actuating mechanism that detects air flow rate, the controller can calculate current air output according to the air flow rate that pitot tube sensor surveyed and the sectional area of outlet duct, the controller can calculate the actual required amount of wind of fume chamber according to the opening height of transparent cabinet door, then adjust the air output of fume chamber through the angle of actuating mechanism regulation butterfly valve block, can adjust the amount of wind of fume chamber according to the opening size of transparent cabinet door from this.
Drawings
Fig. 1 is a front view of a novel ventilation hood with adjustable air volume according to an embodiment of the present invention;
fig. 2 is a perspective view of the novel ventilation hood with adjustable air volume according to the embodiment of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
fig. 4 is a partially enlarged view of a portion B in fig. 2.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In an embodiment of the novel ventilation hood with adjustable air volume of the present invention as shown in fig. 1 to 4, a cabinet body 10 of the novel ventilation hood with adjustable air volume of the embodiment includes a lower storage area 11 and an upper experimental area 12, an air outlet pipe 20 communicated with the upper experimental area 12 is arranged on an upper side of the cabinet body 10, a transparent cabinet door 30 capable of being lifted is arranged on a front side of the upper experimental area 12, and a displacement sensor 501 for detecting an opening height of the transparent cabinet door 30 is arranged on the cabinet body 10; the air outlet pipe 20 is provided with a pitot tube sensor 502, the connection part of the cabinet body 10 and the air outlet pipe 20 is further provided with a butterfly valve 40, an actuating mechanism 401 for controlling the opening angle of the butterfly valve 40 is arranged on the outer side of a valve body of the butterfly valve 40, the top of the cabinet body 10 is further provided with a controller 50, the controller 50 is electrically connected with the displacement sensor 501, the pitot tube sensor 502 and the actuating mechanism 401, and the controller 50 controls the opening angle of the butterfly valve 40 through the actuating mechanism 401 according to detection signals of the displacement sensor 501 and the pitot tube sensor 502.
Above-mentioned embodiment air volume adjustable's novel fume chamber, through setting up the displacement sensor who detects transparent cabinet door opening height, set up the pitot tube sensor that detects air flow rate and the butterfly valve that has actuating mechanism, the controller can calculate current air output according to the air flow rate that pitot tube sensor surveyed and the sectional area of outlet duct, the actual required amount of wind of fume chamber can be calculated according to the opening height of transparent cabinet door to the controller, then adjust the air output of fume chamber through the angle of actuating mechanism regulation butterfly valve block, can adjust the amount of wind of fume chamber according to the opening size of transparent cabinet door from this. Specifically, the air volume of the air outlet pipe is measured by a pitot tube sensor, and according to a Bernoulli equation, the dynamic pressure is in direct proportion to the square of the flow velocity, and the air volume can be calculated by combining the sectional area of the measured point according to the dynamic pressure (Pa) =1/2 rho V; the real-time height of the transparent cabinet door is measured by the displacement sensor, the actually required air volume of the fume hood is calculated, the actually required air volume measured by the displacement sensor is used as a real-time given value of PID control through PID control of the PLC, the air volume value measured by the pitot tube sensor is used as a process feedback value of the PID control, an output value is calculated through the PID control and is sent to an executing mechanism of the butterfly valve, and the opening angle of the butterfly valve is adjusted through the executing mechanism so as to achieve variable air volume adjustment of the fume hood; the actuating mechanism of the butterfly valve is provided with valve plate angle feedback, the angle feedback value is sent to the ventilation PLC controller to analyze the feedback position of the valve plate, so that the rotating speed control of the fan is optimized, and the HMI screen of the air cabinet is used for displaying information such as real-time air quantity or air speed of the air cabinet.
In one embodiment of the present application, preferably, the cabinet body 10 is further provided with a lifting mechanism for controlling the transparent cabinet door 30 to lift, the lifting mechanism includes a transmission chain 61, a lifting motor 62 and a weight plate 63, one end of the transmission chain 61 is connected to the upper side of the transparent cabinet door 30, the other end of the transmission chain 61 is connected to the upper side of the weight plate 63, and the lifting motor 62 drives the transparent cabinet door 30 to lift or lower through the transmission chain 61. Preferably, a first guide groove 601 is arranged on the front side of the cabinet body 10, the transmission chain 61 is arranged in the first guide groove 601 in a penetrating manner, and a vertical opening avoiding the transparent cabinet door 30 is further arranged on the first guide groove 601; the rear side of the cabinet body 10 is provided with a second guide rail 602, and the side of the counterweight plate 63 is provided with a guide slide block 631 matched with the second guide rail 602, so that the transparent cabinet door 30 can be lifted reliably.
In an embodiment of the present application, preferably, a first rotating shaft 641 is disposed at a front side of the top of the cabinet 10, a second rotating shaft 642 is disposed at a rear side of the top of the cabinet 10, a transmission gear 643 is respectively fixed at two ends of the first rotating shaft 641 and the second rotating shaft 642, and the transmission chain 61 is engaged with the transmission gear 643; the end of the first rotating shaft 641 is further provided with a transmission gear 65, the lifting motor 62 drives the first rotating shaft 641 to rotate through the rack belt 66 and the transmission gear 65, and the first rotating shaft 641 drives the transparent cabinet door to lift through the transmission chain 61.
In one embodiment of the present application, it is preferable that a hanger 13 is further installed on the rear wall of the upper experimental zone 12, thereby facilitating the experimental operation. Preferably, the cabinet 10 is further provided with a monitor 14 connected to the controller 50, and the monitor can display information such as air volume and air speed in real time.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. A novel ventilation cabinet with adjustable air volume is characterized in that a liftable transparent cabinet door is arranged on the front side of the upper experiment area, and a displacement sensor for detecting the opening height of the transparent cabinet door is arranged on the cabinet body; the air outlet pipe is provided with a pitot tube sensor, the cabinet body is further provided with a butterfly valve at the joint of the air outlet pipe, an actuating mechanism for controlling the opening angle of the butterfly valve is arranged outside a valve body of the butterfly valve, the top of the cabinet body is further provided with a controller, the controller is connected with a displacement sensor, the pitot tube sensor and the actuating mechanism in an electrical mode, and the controller is used for controlling the opening angle of the butterfly valve according to the displacement sensor and the detection signal of the pitot tube sensor.
2. The novel ventilation cabinet with the adjustable air volume according to claim 1, is characterized in that: still be equipped with the control on the cabinet body elevating system that the transparent cabinet door goes up and down, elevating system includes drive chain, elevator motor and counterweight plate, drive chain's one end with the upside of transparent cabinet door links to each other, drive chain's the other end with the upside of counterweight plate links to each other, elevator motor passes through the drive chain drive the transparent cabinet door rises or descends.
3. The novel ventilation cabinet with the adjustable air volume according to claim 2, is characterized in that: a first guide groove is formed in the front side of the cabinet body, the transmission chain penetrates through the first guide groove, and a vertical opening for avoiding the transparent cabinet door is further formed in the first guide groove; the rear side of the cabinet body is provided with a second guide rail, and the side edge of the counterweight plate is provided with a guide slide block matched with the second guide rail.
4. The novel ventilation cabinet with the adjustable air volume according to claim 3, is characterized in that: a first rotating shaft is arranged on the front side of the top of the cabinet body, a second rotating shaft is arranged on the rear side of the top of the cabinet body, a transmission fluted disc is fixed at each of two ends of the first rotating shaft and the second rotating shaft, and the transmission chain is meshed with the transmission fluted disc; the end part of the first rotating shaft is also provided with a transmission gear, and the lifting motor drives the first rotating shaft to rotate through the rack conveyor belt and the transmission gear.
5. The novel ventilation cabinet with the adjustable air volume according to claim 1, is characterized in that: and a hanging rack is also arranged on the rear wall of the upper experimental area.
6. The novel ventilation cabinet with the adjustable air volume according to claim 1, is characterized in that: the cabinet body is also provided with a monitoring screen connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022238579.9U CN213350128U (en) | 2020-10-10 | 2020-10-10 | Novel fume chamber of amount of wind adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022238579.9U CN213350128U (en) | 2020-10-10 | 2020-10-10 | Novel fume chamber of amount of wind adjustable |
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| Publication Number | Publication Date |
|---|---|
| CN213350128U true CN213350128U (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022238579.9U Active CN213350128U (en) | 2020-10-10 | 2020-10-10 | Novel fume chamber of amount of wind adjustable |
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| CN (1) | CN213350128U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623597A (en) * | 2022-01-24 | 2022-06-14 | 安徽信盟装备股份有限公司 | Front sealing door assembly of hot air circulating type heating machine |
| CN117348383A (en) * | 2023-12-04 | 2024-01-05 | 广州泛美实验室系统科技股份有限公司 | Fume hood variable air volume control method based on laboratory environment monitoring |
-
2020
- 2020-10-10 CN CN202022238579.9U patent/CN213350128U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623597A (en) * | 2022-01-24 | 2022-06-14 | 安徽信盟装备股份有限公司 | Front sealing door assembly of hot air circulating type heating machine |
| CN117348383A (en) * | 2023-12-04 | 2024-01-05 | 广州泛美实验室系统科技股份有限公司 | Fume hood variable air volume control method based on laboratory environment monitoring |
| CN117348383B (en) * | 2023-12-04 | 2024-03-12 | 广州泛美实验室系统科技股份有限公司 | Fume hood variable air volume control method based on laboratory environment monitoring |
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