CN105935680B - A kind of ventilation hoods for laboratories - Google Patents
A kind of ventilation hoods for laboratories Download PDFInfo
- Publication number
- CN105935680B CN105935680B CN201610411443.9A CN201610411443A CN105935680B CN 105935680 B CN105935680 B CN 105935680B CN 201610411443 A CN201610411443 A CN 201610411443A CN 105935680 B CN105935680 B CN 105935680B
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- temperature
- control device
- cabinet
- air draft
- pattern
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- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Ventilation (AREA)
Abstract
The invention discloses the invention discloses a kind of ventilation hoods for laboratories, including：Cabinet, air exhausting device, control device；Cabinet keeps closing by cabinet door；Cabinet is internally provided with temperature sensor, for the temperature in detecting box body；Control device is communicated to connect with temperature sensor and air exhausting device；Control device obtains the actual temperature T in cabinet by temperature sensor, and dynamically controls air exhausting device work according to the value of above-mentioned T；It is preset in control device there are three air draft pattern and three temperature models, three air draft patterns and three temperature models correspond；Further, when the temperature in cabinet is in lower temperature model, control device further judges the rate of change of cabinet body temperature, if temperature is in the state constantly risen, control device selects more higher leveled air draft pattern, if under more higher leveled air draft pattern, the rate of change surface temperature of cabinet body temperature is constantly lowered, control device be then restored to before relatively low air draft pattern.
Description
Technical field
The present invention relates to laboratory equipment technical field more particularly to a kind of ventilation hoods for laboratories.
Background technology
Laboratory ventilation is an indispensable component part in lab design.In order to make laboratory worker not
The chemical substance and organism that some are toxic or toxicity is unknown are sucked, there should be good ventilation in laboratory.Vent cabinet is real
Most common a kind of intermittent local ventilation in room is tested, type is various, since the condition that its structure is different and uses does not have to, air draft
Effect also differs.
Operation in vent cabinet is generally directed to electricity consumption or even open firing, and misoperation can usually cause fire, that is, make
At the loss of life safety and property safety.Therefore, very necessary to the monitoring for in-cabinet temperature of divulging information.Existing vent cabinet is set
In meter, temperature monitoring unit and ventilation equipment are equipped with, temperature of such ventilation equipment in vent cabinet is relatively low and is adopted compared with Gao Shijun
It is worked with same power, in this way, when in-cabinet temperature of divulging information is relatively low, when ventilation equipment are worked using firm power
It can cause the waste of the energy；When in-cabinet temperature of divulging information is higher, ventilation equipment may be made when being worked using above-mentioned power
At the problem that row of wind degree is inadequate, to make the temperature in vent cabinet constantly increase, it is easy that there are fire incident hidden danger.
Invention content
Technical problems based on background technology, the present invention propose a kind of ventilation hoods for laboratories.
Ventilation hoods for laboratories proposed by the present invention, including：Cabinet, air exhausting device, control device；
Cabinet keeps closing by cabinet door；Cabinet is internally provided with temperature sensor, for the temperature in detecting box body；Control
Device is communicated to connect with temperature sensor and air exhausting device；Control device obtains the practical temperature in cabinet by temperature sensor
T is spent, and air exhausting device work is dynamically controlled according to the value of above-mentioned T；
It is preset in control device there are three air draft pattern, respectively the first air draft pattern, the second air draft pattern and third are arranged
Wind pattern；When control device selects the first air draft pattern, the operating power that control device adjusts air exhausting device is P1；Control device
When selecting the second air draft pattern, the operating power that control device adjusts air exhausting device is P2；Control device selects third air draft mould
When formula, the operating power that control device adjusts air exhausting device is P3；Wherein, P3>P2>P1；
Temperature model there are three being preset in control device, respectively the first temperature model, second temperature pattern and third temperature
Degree pattern；When temperature in cabinet is in the first temperature model, control device selects the first air draft pattern；At temperature in cabinet
When second temperature pattern, control device selects the second air draft pattern；When temperature in cabinet is in third temperature model, control
Device selects third air draft pattern；
Three temperature values, respectively the first temperature value T are stored in control device1, second temperature value T2With third temperature value
T3；If T≤T1, then the temperature in cabinet be in the first temperature model；If T1<T≤T2, then the temperature in cabinet is in the second temperature
Degree pattern；If T2<T≤T3, then the temperature in cabinet be in third temperature model；Wherein, T3>T2>T1；
Period there are four being preset in control device：t1、t2、t3、t4；And four rate temperature changes：V1、V2、V3、
V4；
When the temperature in cabinet is in the first temperature model, control device calculates arbitrary t1Temperature sensing in period
The rate of change V of the detected value of device, if V>V1, control device the second air draft pattern of selection；Control device is obtained above-mentioned second
Arbitrary t under air draft pattern2The rate of change V of temperature sensor detected value in period, if V<V2, control device selection first row
Wind pattern；
When the temperature in cabinet is in second temperature pattern, control device calculates t3Temperature sensor in period
The rate of change V of detected value, if V>V3, control device selection third air draft pattern；Control device is obtained in above-mentioned third air draft
Arbitrary t under pattern4The rate of change V of the detected value of temperature sensor in period, if V<V4, control device the second air draft of selection
Pattern.
Preferably, further include exhaust outlet, exhaust outlet is set on cabinet, equipped with filter at exhaust outlet, for filtering from row
Impurity in the gas being discharged at air port.
Preferably, the exhaust outlet is connected with discharge duct, and discharge duct is made of corrosion resistant stainless-steel pipe.
Preferably, the filter includes：Sour absorbed layer, Alkali absorption layer, activated carbon adsorption layer and drying layer.
Preferably, further include alarm, alarm and control device communication connection；If the detected value T of temperature sensor>
T3, control device obtain the information and instruct control alarm alarm.
Preferably, the alarm is audible-visual annunciator.
Preferably, further include display screen；Display screen is set to inside cabinet, and display screen is communicated to connect with control device；Control
Device obtains the detected value T of temperature sensor and T is sent to display screen and shows.
Temperature sensor, air exhausting device and control device are equipped in the present invention；Control device is according to the inspection of temperature sensor
The difference of survey dynamically controls air exhausting device work；When the detected value of temperature sensor is in the first temperature model, control dress
The first air draft pattern of selection is set, i.e. the operating power of instruction control air exhausting device remains P1；When the detected value of temperature sensor
When in second temperature pattern, control device selects the second air draft pattern, the i.e. operating power of instruction control air exhausting device to keep
For P2；When the detected value of temperature sensor is in third temperature model, control device selects third air draft pattern, i.e. instruction control
The operating power of air exhausting device processed remains P3.Further, when the detected value of temperature sensor be in the first temperature model and
When temperature is in the state constantly risen, control device selects the second air draft pattern；When the detected value of temperature sensor is in the
When two temperature models and temperature are in the state constantly risen, control device selects third air draft pattern；In this way, control device root
According to the operating power of the height grading control air exhausting device of ventilation in-cabinet temperature, more accurately the temperature of vent cabinet is controlled
System, the drawback for avoiding the waste for causing resource when temperature is relatively low and causing air draft dynamics inadequate when temperature is higher；And
And the temperature in vent cabinet, when being in continuous raised state, control device automatically selects more higher leveled air draft pattern, with
The raising for coping with temperature ahead of time, preferably carries out air draft to vent cabinet.The present invention is additionally provided with alarm, when cabinet body temperature is continuous
When increasing and being more than preset value, control device obtains the information and control alarm is instructed to alarm, to remind operating personnel
Take counter-measure in time.The present invention is equipped with display screen, and display screen can carry out real-time display, operator to the temperature in vent cabinet
Member can intuitively observe the temperature in operation cabinet, be conducive to operating personnel and carry out control to the temperature in vent cabinet, protect
Demonstrate,prove the safety of experimental implementation.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of ventilation hoods for laboratories；
Fig. 2 is a kind of structural schematic diagram of the control device of ventilation hoods for laboratories.
Specific implementation mode
As shown in Figure 1 and Figure 2, Fig. 1, Fig. 2 are a kind of ventilation hoods for laboratories proposed by the present invention.
Referring to Fig.1, Fig. 2, ventilation hoods for laboratories proposed by the present invention, including：Cabinet 1, air exhausting device 2, control device；
Cabinet 1 keeps closing by cabinet door 3；Cabinet 1 is internally provided with temperature sensor 4, for detecting the temperature in cabinet 1
Degree；Control device is communicated to connect with temperature sensor 4 and air exhausting device 2；Control device obtains cabinet 1 by temperature sensor 4
Interior actual temperature T, and air exhausting device 2 is dynamically controlled according to the value of above-mentioned T and is worked；
It is preset in control device there are three air draft pattern, respectively the first air draft pattern, the second air draft pattern and third are arranged
Wind pattern；When control device selects the first air draft pattern, the operating power that control device adjusts air exhausting device 2 is P1；Control dress
When setting the second air draft pattern of selection, the operating power that control device adjusts air exhausting device 2 is P2；Control device selects third air draft
When pattern, the operating power that control device adjusts air exhausting device 2 is P3；Wherein, P3>P2>P1；
Temperature model there are three being preset in control device, respectively the first temperature model, second temperature pattern and third temperature
Degree pattern；When temperature in cabinet 1 is in the first temperature model, control device selects the first air draft pattern；Temperature in cabinet 1
When in second temperature pattern, control device selects the second air draft pattern；When temperature in cabinet 1 is in third temperature model,
Control device selects third air draft pattern；
Three temperature values, respectively the first temperature value T are stored in control device1, second temperature value T2With third temperature value
T3；If T≤T1, then the temperature in cabinet 1 be in the first temperature model；If T1<T≤T2, then the temperature in cabinet 1 is in second
Temperature model；If T2<T≤T3, then the temperature in cabinet 1 be in third temperature model；Wherein, T3>T2>T1；
Period there are four being preset in control device：t1、t2、t3、t4；And four rate temperature changes：V1、V2、V3、
V4；
When the temperature in cabinet 1 is in the first temperature model, control device calculates arbitrary t1Temperature passes in period
The rate of change V of the detected value of sensor 4, if V>V1, show that the temperature in cabinet 1 is in continuous raised trend, to avoid temperature
Fast raising is spent, control device selects more higher leveled second air draft pattern；And under the second air draft pattern, control device obtains
Take the arbitrary t under above-mentioned second air draft pattern2The rate of change V of 4 detected value of temperature sensor in period, if V<V2, show
Under more higher leveled air draft pattern, the temperature in cabinet 1 is constantly lowered, when temperature is down to safety value, control device choosing
Select the first air draft pattern；
When the temperature in cabinet 1 is in second temperature pattern, control device calculates t3Temperature sensor 4 in period
Detected value rate of change V, if V>V3, illustrate that the temperature in cabinet 1 is in the state constantly risen, to avoid in cabinet 1
Temperature rise in a short time excessively high, control device selects more higher leveled third air draft pattern, with more quickly by cabinet
Temperature in body 1 is down to safety value；Control device obtains the arbitrary t under above-mentioned third air draft pattern4Temperature sensing in period
The rate of change V of the detected value of device 4, if V<V4, show that the temperature in cabinet 1 has been reduced to safety value, control device then selects
Second air draft pattern.
Present embodiment further includes exhaust outlet 5, and exhaust outlet 5 is set on cabinet 1, and filter 6 is equipped at exhaust outlet 5, is used for
It filters from the impurity in the gas being discharged from exhaust outlet 5, filter 6 includes：Sour absorbed layer, Alkali absorption layer, activated carbon adsorption layer
And drying layer；To carry out more comprehensive absorption to chemical substances such as the gas generated in experimentation, particles, avoid directly
Discharge has an impact atmospheric environment.Exhaust outlet 5 is connected with discharge duct, and discharge duct uses corrosion resistant stainless-steel pipe system
At, avoid remaining chemical substance discharge duct service life.
Present embodiment further includes alarm 7 and display screen 8；Alarm 7 is audible-visual annunciator 7, and alarm 7 is filled with control
Set communication connection；If the detected value T of temperature sensor 4>T3, show that the temperature in cabinet 1 has been more than warning value, it is understood that there may be peace
Full hidden danger, control device obtains the information and control alarm 7 is instructed to alarm, to remind experimenter to take reply in time
Measure；
Display screen 8 is set to inside cabinet 1, and display screen 8 is communicated to connect with control device；Control device obtains temperature sensor
T is simultaneously sent to display screen 8 and shown by 4 detected value T, in this way, experimenter can intuitively observe cabinet on display screen 8
Real time temperature in 1 ensures that experimenter to the control of temperature, ensures that the safety of experimental implementation.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of ventilation hoods for laboratories, which is characterized in that including：Cabinet (1), air exhausting device (2), control device；
Cabinet (1) keeps closing by cabinet door (3)；Cabinet (1) is internally provided with temperature sensor (4), for detecting in cabinet (1)
Temperature；Control device is communicated to connect with temperature sensor (4) and air exhausting device (2)；Control device passes through temperature sensor
(4) the actual temperature T in cabinet (1) is obtained, and air exhausting device (2) work is dynamically controlled according to the value of above-mentioned T；
Air draft pattern there are three being preset in control device, respectively the first air draft pattern, the second air draft pattern and third air draft mould
Formula；When control device selects the first air draft pattern, the operating power that control device adjusts air exhausting device (2) is P1；Control device
When selecting the second air draft pattern, the operating power that control device adjusts air exhausting device (2) is P2；Control device selects third air draft
When pattern, the operating power that control device adjusts air exhausting device (2) is P3；Wherein, P3>P2>P1；
Temperature model there are three being preset in control device, respectively the first temperature model, second temperature pattern and third temperature mould
Formula；When temperature in cabinet (1) is in the first temperature model, control device selects the first air draft pattern；Temperature in cabinet (1)
When in second temperature pattern, control device selects the second air draft pattern；Temperature in cabinet (1) is in third temperature model
When, control device selects third air draft pattern；
Three temperature values, respectively the first temperature value T are stored in control device1, second temperature value T2With third temperature value T3；
If T≤T1, then the temperature in cabinet (1) be in the first temperature model；If T1<T≤T2, then the temperature in cabinet (1) is in second
Temperature model；If T2<T≤T3, then the temperature in cabinet (1) be in third temperature model；Wherein, T3>T2>T1；
Period there are four being preset in control device：t1、t2、t3、t4；And four rate temperature changes：V1、V2、V3、V4；
When the temperature in cabinet (1) is in the first temperature model, control device calculates arbitrary t1Temperature sensor in period
(4) the rate of change V of detected value, if V>V1, control device the second air draft pattern of selection；Control device is obtained above-mentioned second
Arbitrary t under air draft pattern2The rate of change V of temperature sensor (4) detected value in period, if V<V2, control device selection first
Air draft pattern；
When the temperature in cabinet (1) is in second temperature pattern, control device calculates t3Temperature sensor (4) in period
Detected value rate of change V, if V>V3, control device selection third air draft pattern；Control device is obtained to be arranged in above-mentioned third
Arbitrary t under wind pattern4The rate of change V of the detected value of temperature sensor (4) in period, if V<V4, control device selection second
Air draft pattern.
2. ventilation hoods for laboratories according to claim 1, which is characterized in that further include exhaust outlet (5), exhaust outlet (5)
On cabinet (1), filter (6) is equipped at exhaust outlet (5), for filtering from miscellaneous in the gas being discharged at exhaust outlet (5)
Matter.
3. ventilation hoods for laboratories according to claim 2, which is characterized in that the exhaust outlet (5) is connected with exhaust
Pipeline, discharge duct are made of corrosion resistant stainless-steel pipe.
4. ventilation hoods for laboratories according to claim 2, which is characterized in that the filter (6) includes：Acid absorbs
Layer, Alkali absorption layer, activated carbon adsorption layer and drying layer.
5. ventilation hoods for laboratories according to claim 1, which is characterized in that further include alarm (7), alarm (7)
It is communicated to connect with control device；If the detected value T of temperature sensor (4)>T3, control device, which obtains the information and instructs, controls report
Alert device (7) is alarmed.
6. ventilation hoods for laboratories according to claim 5, which is characterized in that the alarm (7) is sound-light alarm
Device (7).
7. ventilation hoods for laboratories according to claim 1, which is characterized in that further include display screen (8)；Display screen (8)
Internal set on cabinet (1), display screen (8) is communicated to connect with control device；Control device obtains the detected value of temperature sensor (4)
T is simultaneously sent to display screen (8) and shown by T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610411443.9A CN105935680B (en) | 2016-06-03 | 2016-06-03 | A kind of ventilation hoods for laboratories |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610411443.9A CN105935680B (en) | 2016-06-03 | 2016-06-03 | A kind of ventilation hoods for laboratories |
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| Publication Number | Publication Date |
|---|---|
| CN105935680A CN105935680A (en) | 2016-09-14 |
| CN105935680B true CN105935680B (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610411443.9A Active CN105935680B (en) | 2016-06-03 | 2016-06-03 | A kind of ventilation hoods for laboratories |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110196608A (en) * | 2018-02-26 | 2019-09-03 | 北京视联动力国际信息技术有限公司 | A kind of heat dissipation of terminal device and the cooling control method based on heat dissipation of terminal device |
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| CN201351980Y (en) * | 2008-12-30 | 2009-11-25 | 许璟 | Central air conditioner energy-saving control system |
| CN103978003A (en) * | 2014-04-18 | 2014-08-13 | 天长市华盛科技装饰有限公司 | CIT ventilation cabinet with temperature-proof smoke-proof and fire-extinguishing functions |
| CN203900077U (en) * | 2014-04-18 | 2014-10-29 | 天长市华盛科技装饰有限公司 | CIT multipurpose ventilation cabinet |
| CN204396434U (en) * | 2014-12-05 | 2015-06-17 | 安徽华盛科技控股股份有限公司 | CIT automatic control ventilation cabinet |
| CN104741355A (en) * | 2015-03-03 | 2015-07-01 | 安徽华盛科技控股股份有限公司 | CIT intelligent induction fume hood |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060079164A1 (en) * | 2004-09-30 | 2006-04-13 | Decastro Eugene A | Automatic sash safety mechanism |
| US20110244775A1 (en) * | 2010-04-02 | 2011-10-06 | Kewaunee Scientific Corporation | Apparatus and method for controlling and directing flow of contaminated air to filters and for monitoring filter loading in a biological safety cabinet |
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2016
- 2016-06-03 CN CN201610411443.9A patent/CN105935680B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201351980Y (en) * | 2008-12-30 | 2009-11-25 | 许璟 | Central air conditioner energy-saving control system |
| CN103978003A (en) * | 2014-04-18 | 2014-08-13 | 天长市华盛科技装饰有限公司 | CIT ventilation cabinet with temperature-proof smoke-proof and fire-extinguishing functions |
| CN203900077U (en) * | 2014-04-18 | 2014-10-29 | 天长市华盛科技装饰有限公司 | CIT multipurpose ventilation cabinet |
| CN204396434U (en) * | 2014-12-05 | 2015-06-17 | 安徽华盛科技控股股份有限公司 | CIT automatic control ventilation cabinet |
| CN104741355A (en) * | 2015-03-03 | 2015-07-01 | 安徽华盛科技控股股份有限公司 | CIT intelligent induction fume hood |
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| CN105935680A (en) | 2016-09-14 |
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