CN201008787Y - Intelligent air quantity varying laboratory ventilated closet - Google Patents
Intelligent air quantity varying laboratory ventilated closet Download PDFInfo
- Publication number
- CN201008787Y CN201008787Y CNU2007200932213U CN200720093221U CN201008787Y CN 201008787 Y CN201008787 Y CN 201008787Y CN U2007200932213 U CNU2007200932213 U CN U2007200932213U CN 200720093221 U CN200720093221 U CN 200720093221U CN 201008787 Y CN201008787 Y CN 201008787Y
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- cpu
- cabinet door
- cabinet
- leading block
- transducer
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Abstract
The utility model provides an intelligent variable air volume laboratory ventilation cabinet. The top of the ventilation cabinet noumenon is provided with a blower and a draught; the middle part is an operation cabinet door, the tail part of a haulage rope operating the cabinet door is provided with a pullback weight to form a kinematic pair with a guide sheave. The blower adopts a transduction motor and a CPU as a chief control circuit, wherein a cabinet door displacement detection device is connected with a signal input end of the CPU; a CPU mainboard is connected with a transducer plate directly; a power supply is connected with the input end of the transducer; the blower is connected with the output end of the transducer; an alarm and a caution light are connected to the corresponding output terminals of the CPU. The CPU gives an instruction to control the transducer and change the running speed of the wing machine to realize the transduction timing after a computing processing of collected information of various sensors. The ventilation cabinet is provided with the variable air volume control function by utilizing the variable frequency control technique, which can detect accurately the noxious gas discharged from ventilation cabinet and can reduce the power consumption and the noise, and even work without noise.
Description
Technical field
The utility model discloses a kind of intelligent variable air rate laboratory ventilation cabinet, is to the improvement in existing laboratory ventilation cabinet, belongs to the laboratory equipment technical field.
Background introduction
Vent cabinet is one of safety means important in the laboratory, is mainly used in and discharges produce in the experimentation poisonous, is harmful to, has flavor gas, ensures experimenter's physical and mental health, the working environment of Creating Comfort safety.But existing fume hood mostly is simple frame for movement, and the ventilation of blower fan immobilizes during work, can not open its ventilation of size adjustment with the experimental implementation door, has not only wasted electric energy, influences the operation experiments effect toward contact.
Summary of the invention
The utility model is for overcoming the existing changeless defective of Ventilating cabinet ventilation, a kind of intelligent variable air rate laboratory ventilation cabinet is provided, utilize variable-frequency control technique to make Ventilating cabinet have variable air rate control function, not only can finish the function that the laboratory ventilation cabinet exhales pernicious gases exactly, can also cut down the consumption of energy, reduce noise even noise-free operation.
The utility model adopts following technical solution: the Ventilating cabinet upper part of body is blower fan and air outlet, the middle part is operation cabinet door, in body, be provided with the leading block group, one end of pull rope is connected with the top of operation cabinet door, its tail end is provided with counterweight, constitute kinematic pair with the leading block group, blower fan is selected variable-frequency motor for use, adopt CPU as control circuit, wherein, displacement sensor device is located at respectively on operation cabinet door and the frame diverse location, be connected with the signal input part of the CPU of control circuit, the signal output part of CPU links with the signal input part of frequency converter, and power supply connects the frequency converter input, and blower fan connects inverter output terminal; Baroceptor P, gas sensor Q, human-body infrared sensing device H are connected with analog input end QY, QT, the RT of CPU respectively; Warning lamp L, alarm bell S are connected with analog output QL, the QS of CPU respectively.CPU after the calculation process, sends instruction control frequency converter by gathering the information of various sensors, changes the running speed of blower fan, realizes frequency control.
Above-mentioned cabinet door displacement detector adopts one or more of following structure:
1, slide rheostat method:
Leading block has two pulleys to constitute, one of them is connected with potentiometer is coaxial, drive potentiometer and rotate the change resistance value, the formation transmission of counterweight pull rope and leading block, the slip of potentiometer becomes the resistance end and is connected with the input end of analog signal V2 of CPU, when the cabinet door moves up and down, rotates by band action-oriented pulley and potentiometer, change the V2 input terminal voltage of CPU, directly control rotation speed of fan by the CPU output order.The current potential of V2 changes in the 10V scope continuously 0, finishes wind speed by zero adjusting to maximum.
2, actuating doors displacement transducer method:
Some groups of actuating doors displacement transducers (comprising fixed position sensors such as magnetic switch, optocoupler or hall device) are located at respectively on operation cabinet door and the frame diverse location, displacement to the cabinet door detects, the output signal of displacement transducer is connected on switching signal input D1～D6 of CPU, and the needed wind speed input of each point computer can be accomplished accurate controlled wind speed.
3, ultrasonic ranging method:
In body, the analog signal end CS that its signal output part meets CPU sends the high low signal that opens the door that records into computer with the ultrasonic ranging transmitter device, finishes wind speed control.
Good effect of the present utility model is: adopted frequency control blower fan and operation cabinet door displacement transducer to make Ventilating cabinet have hommization and controlled function automatically, end user's body sensor is opened exhaust system automatically and is discharged gas when personnel enter the workspace; Use the pernicious gas sensor during unmanned, to detect harmful gas concentration automatically, when gas leaks, open exhaust system automatically and discharge gas.Start sound and light alarm simultaneously and remind the relevant personnel to note, solve the blower fan problem of operating at full capacity for a long time, power consumption noise reduction sound is saved in the air quantity precise control.Use the actuating doors displacement transducer monitoring actuating doors size of opening the door, regulate the wind speed air quantity automatically.Sealed internal light source has bright, soft, characteristics such as safety, longevity.
Description of drawings
Fig. 1 is the utility model structure principle chart.
Fig. 2 is the utility model circuit theory diagrams.
1, body; 2, operation cabinet door; 3, displacement sensor device; 4, power supply; 5, control circuit; 6, base; 7, blower fan; 8, air outlet; 9, leading block group; 10, pull rope; 11, counterweight.
The specific embodiment
According to shown in Figure 1, the top of Ventilating cabinet body 1 is blower fan 7 and air outlet 8, the middle part is operation cabinet door 2, the bottom is a base cabinet 6, in body 1, be provided with leading block group 9, one end of pull rope 10 is connected with the top of operation cabinet door 2, its tail end is provided with counterweight 11, constitute kinematic pair with leading block group 9, blower fan 7 is selected variable-frequency motor for use, adopt CPU as control circuit 5, wherein, displacement sensor device 3 is located at respectively on operation cabinet door 2 and the frame diverse location, be connected D1～D6 (with reference to Fig. 2) with the cpu signal input of control circuit 5, the control end O of CPU is connected with the signal input part I of frequency converter, and power supply meets frequency converter input R, S, T, blower fan M meets inverter output terminal U, V, W; Baroceptor P, gas sensor Q, human-body infrared sensing device H are connected with analog input end QY, QT, the RT of CPU respectively; Warning lamp L, alarm bell S are connected with analog output QL, the QS of CPU respectively.CPU after the calculation process, sends instruction control frequency converter by gathering the information of various sensors, changes the running speed of blower fan, realizes frequency control.
When cabinet door displacement detector 3 adopts the slide rheostat method:
Leading block 9 has two pulleys to constitute, one of them is connected with potentiometer W is coaxial, drive potentiometer W and rotate the change resistance value, the formation transmission of counterweight pull rope 10 and leading block 9, the slip of potentiometer W becomes the resistance end and is connected with the input end of analog signal V2 of CPU, when cabinet door 2 moves up and down, drives leading block 9 and potentiometer W rotation by pull rope 10, change the V2 input terminal voltage of CPU, directly control blower fan M rotating speed by the CPU output order.
Cabinet door displacement detector 3 adopts the optocoupler detection methods, and the mating plate of cutting of light idol is installed on the leading block 9, and optocoupler is fixed on the relative position of directive wheel 9 of body 1, and CPU detects light idol signal, provides the controlled wind speed instruction by setup program.
In like manner also can adopt Hall element or magnetic switch to replace light idol sensor to realize cabinet door displacement detection function.
Claims (2)
1. intelligent variable air rate laboratory ventilation cabinet, the Ventilating cabinet upper part of body is blower fan and air outlet, the middle part is operation cabinet door, it is characterized in that: in body, be provided with the leading block group, one end of pull rope is connected with the top of operation cabinet door, its tail end is provided with counterweight, constitute kinematic pair with the leading block group, blower fan is selected variable-frequency motor for use, adopts CPU as control circuit, wherein, displacement sensor device is located at respectively on operation cabinet door and the frame diverse location, is connected with the signal input part of the CPU of control circuit, and the signal output part of CPU links with the signal input part of frequency converter, power supply connects the frequency converter input, and blower fan connects inverter output terminal; Baroceptor, gas sensor, human-body infrared sensing device are connected with the analog input end of CPU respectively; Warning lamp, alarm bell are connected with the analog output of CPU respectively.
2. Ventilating cabinet according to claim 1, it is characterized in that: leading block is made of two pulleys, one of them is connected with potentiometer is coaxial, the formation transmission of counterweight pull rope and leading block, and the slip of potentiometer becomes the resistance end and is connected with the input end of analog signal V2 of CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200932213U CN201008787Y (en) | 2007-01-26 | 2007-01-26 | Intelligent air quantity varying laboratory ventilated closet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200932213U CN201008787Y (en) | 2007-01-26 | 2007-01-26 | Intelligent air quantity varying laboratory ventilated closet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201008787Y true CN201008787Y (en) | 2008-01-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200932213U Expired - Fee Related CN201008787Y (en) | 2007-01-26 | 2007-01-26 | Intelligent air quantity varying laboratory ventilated closet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201008787Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029203A (en) * | 2010-10-25 | 2011-04-27 | 广州市泛美实业有限公司 | Control system of laboratory variable air volume (VAV) fume hood |
| CN102161009A (en) * | 2011-04-06 | 2011-08-24 | 南品磊 | Combustible product and toxic product storing cabinet of teaching laboratory equipment |
| CN102615079A (en) * | 2012-03-15 | 2012-08-01 | 昆山大百科实验室设备工程有限公司 | Ventilation hood control system |
| CN103272818A (en) * | 2013-06-05 | 2013-09-04 | 广州穗剑实验室科技有限公司 | Novel energy-saving environment-friendly numerical-control fume hood of laboratory |
| CN103326588A (en) * | 2013-06-20 | 2013-09-25 | 苏州汇川技术有限公司 | High-voltage frequency converter and cabinet top fan control device |
| CN105212549A (en) * | 2015-10-30 | 2016-01-06 | 嘉兴市欣欣仪器设备有限公司 | Inflammable poisonous and harmful product smart memory cabinet |
| CN107866434A (en) * | 2016-09-26 | 2018-04-03 | 苏州天弘益华机电有限公司 | A kind of ventilation hoods for laboratories system |
| CN113870534A (en) * | 2021-08-15 | 2021-12-31 | 桂林理工大学 | Structural design method of explosion-proof harmful gas detection fume hood |
-
2007
- 2007-01-26 CN CNU2007200932213U patent/CN201008787Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029203A (en) * | 2010-10-25 | 2011-04-27 | 广州市泛美实业有限公司 | Control system of laboratory variable air volume (VAV) fume hood |
| CN102029203B (en) * | 2010-10-25 | 2013-02-13 | 广州市泛美实业有限公司 | Control system of laboratory variable air volume (VAV) fume hood |
| CN102161009A (en) * | 2011-04-06 | 2011-08-24 | 南品磊 | Combustible product and toxic product storing cabinet of teaching laboratory equipment |
| CN102161009B (en) * | 2011-04-06 | 2012-10-24 | 南品磊 | Combustible product and toxic product storing cabinet of teaching laboratory equipment |
| CN102615079A (en) * | 2012-03-15 | 2012-08-01 | 昆山大百科实验室设备工程有限公司 | Ventilation hood control system |
| CN103272818A (en) * | 2013-06-05 | 2013-09-04 | 广州穗剑实验室科技有限公司 | Novel energy-saving environment-friendly numerical-control fume hood of laboratory |
| CN103326588A (en) * | 2013-06-20 | 2013-09-25 | 苏州汇川技术有限公司 | High-voltage frequency converter and cabinet top fan control device |
| CN105212549A (en) * | 2015-10-30 | 2016-01-06 | 嘉兴市欣欣仪器设备有限公司 | Inflammable poisonous and harmful product smart memory cabinet |
| CN107866434A (en) * | 2016-09-26 | 2018-04-03 | 苏州天弘益华机电有限公司 | A kind of ventilation hoods for laboratories system |
| CN113870534A (en) * | 2021-08-15 | 2021-12-31 | 桂林理工大学 | Structural design method of explosion-proof harmful gas detection fume hood |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080123 Termination date: 20150126 |
|
| EXPY | Termination of patent right or utility model |