CN111112272A - Variable air volume ventilation cabinet - Google Patents
Variable air volume ventilation cabinet Download PDFInfo
- Publication number
- CN111112272A CN111112272A CN201911384223.1A CN201911384223A CN111112272A CN 111112272 A CN111112272 A CN 111112272A CN 201911384223 A CN201911384223 A CN 201911384223A CN 111112272 A CN111112272 A CN 111112272A
- Authority
- CN
- China
- Prior art keywords
- fan
- air supply
- fume hood
- fume
- switch
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L9/00—Supporting devices; Holding devices
- B01L9/02—Laboratory benches or tables; Fittings therefor
Abstract
The invention discloses a variable air volume fume hood, which comprises a fume hood body, wherein an air exhaust device is arranged at the top of the fume hood body, the air exhaust device comprises a fan, a gas collecting hood, a frequency converter, a temperature sensor and a PID (proportion integration differentiation) regulator, the gas collecting hood is arranged on the inner side of the top of the fume hood body, the fan is connected with the gas collecting hood through a connecting pipe, the fan is connected with an exhaust pipe, the temperature sensor is arranged inside the fume hood body, the temperature sensor is connected with the PID regulator, the PID regulator is connected with the frequency converter, the frequency converter is connected with the fan, an air supply outlet is arranged in the fume hood body and is connected with the air supply device, the air supply device comprises an air supply fan, an air supply pipe and a fan switch, the air supply fan is connected with the air supply pipe, the fume hood body is provided with a liftable cabinet door and a cabinet door frame, the opening and closing of, the distance sensor is connected with the control device, and a fan switch and a main switch are arranged on the ventilation cabinet body.
Description
Technical Field
The invention relates to the technical field of laboratory equipment, in particular to a variable air volume ventilation cabinet.
Background
When carrying out chemistry or chemical examination class experiment in the laboratory, often can involve harmful gas, foul smell, moisture and easily fire, explosive, among the test of corrosive substance, in order to protect experiment operating personnel and whole laboratory staff's safety, prevent that the pollutant that produces during the experiment from diffusing to the laboratory, the experimental process of this kind of experiment will be accomplished in the fume chamber usually, consequently, it becomes very important to carry out thorough ventilation in the fume chamber, ventilation unit in the current fume chamber adopts invariable wind speed and fixed size tuber pipe to carry out the exhaust, the size of its amount of wind also can not change, when fume chamber internal temperature is lower, ventilation unit uses this kind of power to carry out the exhaust and leads to the fact the wasting of resources easily, when fume chamber internal temperature is higher, ventilation unit uses invariable power to carry out the operation of airing exhaust probably to cause the exhaust not thoroughly, The problem of insufficient exhaust force, and when some chemical substances are heated or subjected to organic chemical reaction experiments, the temperature in the cabinet body is relatively high, and at the moment, if measures are not taken in time, accidents are easily caused.
Ventilating device in the fume chamber on the existing market adopts invariable wind speed and the tuber pipe of fixed size to air exhaust, and the size of its amount of wind also can not change, and when the internal temperature of fume chamber cabinet was lower, ventilating device used this kind of power to air exhaust and caused the wasting of resources easily, and when the internal temperature of fume chamber cabinet was higher, ventilating device used invariable power probably caused the problem that air exhaust thoroughly, the dynamics of airing exhaust is not enough when airing device used the operation of airing exhaust to air exhaust.
However, in the prior art, the ventilation device in the fume hood exhausts air by using the air pipe with constant air speed and fixed size, which easily causes resource waste or insufficient exhaust.
Disclosure of Invention
The invention aims to provide a variable air volume ventilation cabinet, which can change the air speed of a fan in an exhaust device, save power resources and exhaust more fully.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a variable air volume fume hood comprises a fume hood body, wherein an exhaust device is arranged at the top of the fume hood body, the exhaust device comprises a fan, a gas collecting hood, a frequency converter, a temperature sensor and a PID (proportion integration differentiation) regulator, the gas collecting hood is arranged on the inner side of the top of the fume hood body, the fan is connected with the gas collecting hood through a connecting pipe, the fan is connected with an exhaust pipe, the temperature sensor is arranged inside the fume hood body, the temperature sensor is connected with the PID regulator, the PID regulator is connected with the frequency converter, the frequency converter is connected with the fan, an air supply opening is formed in the fume hood body and is connected with an air supply device, the air supply device comprises an air supply fan, an air supply pipe and a fan switch, the air supply fan is connected with the air supply pipe, and the fume hood body is provided with a liftable cabinet door and a cabinet door frame, the opening and closing of the cabinet door are controlled by a control device, an air supply fan switch is arranged at the bottom of the cabinet door frame, a distance sensor is arranged on the ventilation cabinet body, the distance sensor is connected with the control device, and a fan switch and a master switch are arranged on the ventilation cabinet body.
Preferably, an exhaust gas treatment device is arranged on the exhaust pipe.
Preferably, the waste gas treatment device comprises an acid-base spray tower.
Preferably, the fume chamber is provided with a laboratory bench, and the laboratory bench is provided with a water tank.
Preferably, the material of laboratory bench is polypropylene board.
Preferably, the air supply fan switch is a jog switch.
Adopt above-mentioned technical scheme, owing to be equipped with exhaust device for gas in the fume chamber can be discharged, owing to be equipped with converter, temperature sensor and PID regulator, make exhaust device can carry out the regulation of the amount of wind, practice thrift electric power resource, it is more abundant to exhaust, owing to be equipped with air supply arrangement, makes the gas in the fume chamber discharge and obtains more thoroughly, forms a circulating air current in the fume chamber.
Drawings
Fig. 1 is a schematic structural view of a variable air volume fume hood of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in figure 1, a variable air volume fume hood comprises a fume hood body 1, an air exhaust device is arranged at the top of the fume hood body 1, the air exhaust device comprises a fan 2, a gas collecting hood 3, a frequency converter, a temperature sensor 4 and a PID regulator, the gas collecting hood 3 is arranged on the inner side of the top of the fume hood body 1, the fan 2 is connected with the gas collecting hood 3 through a connecting pipe 5, the fan 2 is connected with an exhaust pipe 6, the temperature sensor 4 is arranged inside the fume hood body 1, the temperature sensor 4 is connected with the PID regulator, the PID regulator is connected with the frequency converter, the frequency converter is connected with the fan 2, the output end of the temperature sensor 4 is connected with the PID regulator, the temperature sensor 4 is used for sensing the temperature in the fume hood body 1, the PID regulator is connected with the frequency converter, the running speed of the fan 2 is controlled by the frequency converter, and the rotating speed of the fan 2 is changed according to the temperature change, an air supply outlet is arranged in the ventilation cabinet body 1 and is connected with an air supply device, the air supply device comprises an air supply fan 7, an air supply pipe 8 and a fan switch, the air supply fan 7 is connected with the air supply pipe 8, the ventilation cabinet body 1 is provided with a liftable cabinet door and a cabinet door frame, the opening and closing of the cabinet door is controlled by a control device, the bottom of the cabinet door frame is provided with the air supply fan switch, after the cabinet door is closed, an air exhaust device and the air supply device run simultaneously, the inside and the outside of the fume hood body 1 form a circulation, gas generated inside the fume hood body 1 can be better sent out to the outside, a distance sensor 9 is arranged on the fume hood body, the distance sensor 9 is connected with a control device, the distance sensor 9 is used for sensing whether a person stands in front of the fume hood body 1 or not, damage to a human body caused by movement of a cabinet door is avoided, and a fan switch and a main switch are arranged on the fume hood body 1; the exhaust pipe 6 is provided with a waste gas treatment device; the waste gas treatment device comprises an acid-base spray tower 10, so that acid and base mixed in air and generated in the experimental process can be effectively removed, and the outdoor air is prevented from being polluted; the fume hood is provided with a test bench, and a water tank is arranged on the test bench; the experiment table is made of a polypropylene plate; the air supply fan switch is the inching switch, and the inching switch is when the cabinet door is closed promptly, and the air supply fan switches on promptly, and when the experiment was accomplished and need be aired exhaust and handle, switch on master switch promptly, air supply fan began to operate this moment.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (6)
1. The utility model provides a variable blast volume fume chamber, includes the fume chamber cabinet body, its characterized in that: the top of the fume hood body is provided with an exhaust device, the exhaust device comprises a fan, a gas collecting hood, a frequency converter, a temperature sensor and a PID regulator, the gas collecting hood is arranged on the inner side of the top of the fume hood body, the fan is connected with the gas collecting hood through a connecting pipe, the fan is connected with an exhaust pipe, the temperature sensor is arranged inside the fume hood body, the temperature sensor is connected with the PID regulator, the PID regulator is connected with the frequency converter, the frequency converter is connected with the fan, an air supply outlet is arranged in the fume hood body and is connected with the air supply device, the air supply device comprises an air supply fan, an air supply pipe and a fan switch, the air supply fan is connected with the air supply pipe, the fume hood body is provided with a liftable cabinet door and a cabinet door frame, and the opening and closing of the cabinet door are controlled by a control device, the ventilating cabinet is characterized in that an air supply fan switch is arranged at the bottom of the cabinet door frame, a distance sensor is arranged on the ventilating cabinet body, the distance sensor is connected with the control device, and a fan switch and a main switch are arranged on the ventilating cabinet body.
2. A variable air volume fumehood according to claim 1, wherein: and the exhaust pipe is provided with a waste gas treatment device.
3. A variable air volume fumehood according to claim 2, wherein: the waste gas treatment device comprises an acid-base spray tower.
4. A variable air volume fumehood according to claim 1, wherein: the fume chamber is provided with a test bench, and a water tank is arranged on the test bench.
5. A variable air volume fume hood according to claim 4, characterized in that: the experiment table is made of a polypropylene plate.
6. A variable air volume fumehood according to claim 1, wherein: the air supply fan switch is a inching switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384223.1A CN111112272A (en) | 2019-12-28 | 2019-12-28 | Variable air volume ventilation cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384223.1A CN111112272A (en) | 2019-12-28 | 2019-12-28 | Variable air volume ventilation cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111112272A true CN111112272A (en) | 2020-05-08 |
Family
ID=70505716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911384223.1A Withdrawn CN111112272A (en) | 2019-12-28 | 2019-12-28 | Variable air volume ventilation cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111112272A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827995A (en) * | 2021-03-01 | 2021-05-25 | 湖南长海现代实验室设备有限公司 | PID self-tuning method for variable air volume ventilation cabinet surface air speed |
| CN114247722A (en) * | 2021-11-19 | 2022-03-29 | 北京戴纳实验科技有限公司 | Ventilation experiment cabinet capable of adjusting temperature and air quantity |
| CN114433269A (en) * | 2022-03-01 | 2022-05-06 | 张银花 | Central experiment table that intelligence was ventilated |
| CN117732532A (en) * | 2024-02-19 | 2024-03-22 | 无锡莱姆顿科技有限公司 | Negative pressure type laboratory glassware purifies position |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5665128A (en) * | 1995-12-05 | 1997-09-09 | Nuaire, Inc. | Clean air cabinet with valved exhaust |
| US20140187136A1 (en) * | 2004-01-20 | 2014-07-03 | Greenheck Fan Corporation | Exhaust fan assembly |
| CN203748948U (en) * | 2014-03-27 | 2014-08-06 | 青华科教仪器有限公司 | Constant temperature and humidity safe type storage cabinet |
| CN106269770A (en) * | 2015-06-13 | 2017-01-04 | 江苏荣拓实验设备有限公司 | A kind of Novel fume chamber |
| CN206425324U (en) * | 2016-12-31 | 2017-08-22 | 广州茂润实验室设备科技有限公司 | A kind of energy-saving ventilation cabinet |
| CN207288299U (en) * | 2017-07-26 | 2018-05-01 | 天津睿泽科技发展有限公司 | A kind of Novel fume chamber |
| CN108580498A (en) * | 2018-06-28 | 2018-09-28 | 中绿能汉郁（天津）科技有限公司 | A kind of variable air quantity vent cabinet |
| CN209647181U (en) * | 2019-06-28 | 2019-11-19 | 辜炯益 | A kind of use for laboratory draught cupboard |
-
2019
- 2019-12-28 CN CN201911384223.1A patent/CN111112272A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5665128A (en) * | 1995-12-05 | 1997-09-09 | Nuaire, Inc. | Clean air cabinet with valved exhaust |
| US20140187136A1 (en) * | 2004-01-20 | 2014-07-03 | Greenheck Fan Corporation | Exhaust fan assembly |
| CN203748948U (en) * | 2014-03-27 | 2014-08-06 | 青华科教仪器有限公司 | Constant temperature and humidity safe type storage cabinet |
| CN106269770A (en) * | 2015-06-13 | 2017-01-04 | 江苏荣拓实验设备有限公司 | A kind of Novel fume chamber |
| CN206425324U (en) * | 2016-12-31 | 2017-08-22 | 广州茂润实验室设备科技有限公司 | A kind of energy-saving ventilation cabinet |
| CN207288299U (en) * | 2017-07-26 | 2018-05-01 | 天津睿泽科技发展有限公司 | A kind of Novel fume chamber |
| CN108580498A (en) * | 2018-06-28 | 2018-09-28 | 中绿能汉郁（天津）科技有限公司 | A kind of variable air quantity vent cabinet |
| CN209647181U (en) * | 2019-06-28 | 2019-11-19 | 辜炯益 | A kind of use for laboratory draught cupboard |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827995A (en) * | 2021-03-01 | 2021-05-25 | 湖南长海现代实验室设备有限公司 | PID self-tuning method for variable air volume ventilation cabinet surface air speed |
| CN114247722A (en) * | 2021-11-19 | 2022-03-29 | 北京戴纳实验科技有限公司 | Ventilation experiment cabinet capable of adjusting temperature and air quantity |
| CN114247722B (en) * | 2021-11-19 | 2022-11-08 | 北京戴纳实验科技有限公司 | Ventilation experiment cabinet capable of adjusting temperature and air quantity |
| CN114433269A (en) * | 2022-03-01 | 2022-05-06 | 张银花 | Central experiment table that intelligence was ventilated |
| CN117732532A (en) * | 2024-02-19 | 2024-03-22 | 无锡莱姆顿科技有限公司 | Negative pressure type laboratory glassware purifies position |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200508 |