CN105588302A - CIT dead-zone-free rapid pressure regulation system - Google Patents
CIT dead-zone-free rapid pressure regulation system Download PDFInfo
- Publication number
- CN105588302A CN105588302A CN201510968867.0A CN201510968867A CN105588302A CN 105588302 A CN105588302 A CN 105588302A CN 201510968867 A CN201510968867 A CN 201510968867A CN 105588302 A CN105588302 A CN 105588302A
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- air
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- cit
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
Abstract
The invention discloses a CIT dead-zone-free rapid pressure regulation system. The system comprises a blower, an exhaust fan, a main air supply pipe and at least one air control mechanism, wherein each air control mechanism comprises air distribution pipes and exhaust pipes. According to the CIT dead-zone-free rapid pressure regulation system, the opening degree of inlet air valves is set in advance, so that when an air supply and exhaust system is shared, different laboratories can have different air flow. Besides, the opening degree of the inlet air valves is set in advance, whether the laboratories are ventilated or not is realized by controlling opening and closing of inlet electric air valves, thus, change of the opening degree due to frequent opening of the inlet air valves can be avoided, and the stability of the air flow of the laboratories can be guaranteed.
Description
Technical field
The present invention relates to pressure regulation technology field, relate in particular to a kind of CIT without dead band rapid pressure regulating system.
Background technology
The different laboratories of function that use, except requiring certain air mass flow, also require to reach the gas of regulationPress, to ensure that between adjacent laboratory, air-flow direction in accordance with regulations flows. When multiple laboratories share a set ofWhen air-supply and exhaust system, often producing the laboratory air quantity having can not meet the demands, and some laboratoriesPressure can not meet the demands, and even can not regulate pressure, produces pressure and regulates dead band. For ensureing to ownThe air quantity in laboratory and pressure can meet the requirements of numerical value, need a kind of CIT to adjust without dead band rapid pressureJoint system.
Summary of the invention
The technical problem existing based on background technology, the present invention proposes a kind of CIT and adjusts without dead band rapid pressureJoint system.
A kind of CIT that the present invention proposes without dead band rapid pressure regulating system, is characterized in that, comprising: sendBlower fan, exhaust blower, main ajutage and at least one wind control mechanism; Wind control mechanism comprises point airduct and exhaust duct;
Main ajutage is connected with pressure fan, and the two ends of point airduct connect respectively main ajutage and laboratory air inlet,The two ends of exhaust duct connect respectively laboratory air outlet and exhaust blower; Pressure fan is by main ajutage and point airductTo the air-supply of each laboratory, exhaust blower is extracted the air in laboratory and is got rid of by exhaust duct;
Air velocity transducer for detection of wind speed is installed in main ajutage, a point airduct be provided with import air-valve andImport Electric air valve, is provided with the pressure sensor for detection of room pressure in laboratory, exhaust duct is provided withOutlet air-valve;
Adjuster is respectively with pressure fan, air velocity transducer, import Electric air valve, pressure sensor with go out one's intention as revealed in what one saysValve connects; The gas flow that the aperture of import air-valve can need according to laboratory is preset, adjuster basisThe working state control import Electric air valve in laboratory is opened or is closed, according to the control of pressure sensor detected valueOutlet valve area, and according to the aperture control pressure fan wind of the detected value of pressure sensor and outlet air-valveSpeed.
Preferably, be preset with aperture higher limit and aperture lower limit in adjuster, adjuster is according to outlet air-valveAperture and the wind speed of the comparative result control pressure fan of aperture higher limit and aperture lower limit.
Preferably, after laboratory is enabled, import Electric air valve corresponding to adjuster control opened, then basisThe detected value of air velocity transducer calculates air quantity, and according to the rotating speed of air quantity control pressure fan; It is default that air quantity reachesAfter airflow value, by the indoor atmospheric pressure value of pressure sensor test experience, when atmospheric pressure value is positioned at default air pressure modelIn enclosing, detect one's intention as revealed in what one says valve opening, and according to the Measuring opening result of outlet air-valve, pressure fan rotating speed is enteredRow regulates; When atmospheric pressure value exceeds default extruding scope, the aperture of outlet air-valve is regulated, and according toThe Measuring opening result of outlet air-valve regulates the rotating speed of pressure fan.
Preferably, the aperture higher limit of outlet air-valve is directly proportional to the laboratory quantity of enabling, outlet air-valveAperture lower limit is inversely proportional to the laboratory quantity of enabling.
Preferably, when the laboratory quantity of enabling is 2-3, the aperture higher limit of outlet air-valve is 75%, goes outThe aperture lower limit 50% of one's intention as revealed in what one says valve.
Preferably, when the laboratory quantity of enabling is 4-6, the aperture higher limit of outlet air-valve is 80%, goes outThe aperture lower limit 45% of one's intention as revealed in what one says valve.
Preferably, adjuster is by acquisition that the sectional area of the detected value of air velocity transducer and main ajutage is multiplied each otherAir quantity.
Preferably, adjuster is also connected with exhaust blower, and it is according to laboratory gas flow demand control exhaust blowerAnd/or pressure fan work.
Preferably, import Electric air valve is positioned at the side near laboratory on point airduct.
CIT provided by the invention is without dead band rapid pressure regulating system, by the aperture of default import air-valve,Can make in the time of shared a set of air-supply and exhaust system, different experiments chamber can obtain different air mass flows. And,Import air-valve preset in advance aperture, whether laboratory ventilation is realized by the switch of controlling import Electric air valve,Thereby, can avoid changing due to import air-valve is opened to the aperture causing frequently, thus favourableIn ensureing the stable of each laboratory air mass flow.
In the present invention, import Electric air valve is while coming into operation in laboratory, is controlled completely and is beaten by adjusterOpen, when laboratory is stopped using, close completely, its duty is consistent with the duty in laboratory,Be conducive to improve the operating efficiency of air-supply exhaust system, realize the automation of laboratory air-supply air draft.
In the present invention, adjuster can identify the aperture signal of one's intention as revealed in what one says valve, and can control its aperture,So, in conjunction with the detected value of pressure sensor, the aperture of outlet air-valve is controlled, can further be regulatedAir pressure in laboratory, thus the demand of the air pressure in guarantee laboratory especially can meet and share a set of air-supplyDuring with exhaust system, the demand of different experiments chamber to different air pressure. In the present invention, adjuster also can be to air-supplyThe wind speed of machine regulates, thereby avoids the aperture that exports air-valve to occur dead band, improves the flexible of system worksProperty, the aperture of using one's intention as revealed in what one says valve maintains in " threshold range " all the time, regulates without dead band thereby reach pressureObject.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of CIT of proposing of the present invention without dead band rapid pressure regulating system;
Fig. 2 is the control structure schematic diagram of a kind of CIT of proposing of the present invention without dead band rapid pressure regulating system;
Fig. 3 is that a kind of CIT of proposing of the present invention is without dead band rapid pressure regulating system workflow schematic diagram.
Detailed description of the invention
As shown in Figure 1 and Figure 2, Fig. 1, Fig. 2 are that a kind of CIT that the present invention proposes adjusts without dead band rapid pressureJoint system.
With reference to Fig. 1, Fig. 2, what the present invention proposed is a kind of for regulating laboratory 4 air mass flows and pressureCIT, without dead band rapid pressure regulating system, comprising: pressure fan 1, exhaust blower 2, main ajutage 3 and at leastA wind control mechanism; Wind control mechanism is arranged in laboratory 4, and it comprises point airduct 5 and exhaust duct 6.
Main ajutage 3 is connected with pressure fan 1, and the two ends of point airduct 5 connect respectively main ajutage 3 and experimentChamber 4 air inlets, the two ends of exhaust duct 6 connect respectively laboratory 4 air outlets and exhaust blower 2; Pressure fan 1 is logicalCross main ajutage 3 and a point airduct 5 and blow to each laboratory 4, exhaust blower 2 extracts experiment by exhaust duct 6Air in chamber 4 is also got rid of.
Air velocity transducer 7 for detection of wind speed is installed in main ajutage 3, and a point airduct 5 is provided with import windValve 8 and import Electric air valve 9, be provided with the pressure sensor 10 for detection of room pressure in laboratory 4,Exhaust duct 6 is provided with outlet air-valve 11, and outlet air-valve 11 apertures are adjustable, thereby by adjusting one's intention as revealed in what one says valve11 aperture can be controlled the air-out speed in laboratory 4.
The air-flow in laboratory 4 is provided by pressure fan 1, and the size of the gas flow in laboratory can be on the offensive in advanceThe moving import air-valve 8 of adjusting sets, and makes the gas flow in laboratory 4 obtain appropriate distribution.
Adjuster 12 respectively with pressure fan 1, air velocity transducer 7, import Electric air valve 9, pressure sensor10 are connected with outlet air-valve 11. The gas flow that the aperture of import air-valve 8 can need according to laboratory 4 carries outDefault, adjuster 12 opens or cuts out, root according to the working state control import Electric air valve 9 in laboratory 4Export the aperture of air-valve 11 according to the detected value control of pressure sensor 10, and according to the inspection of pressure sensor 10The wind speed of the aperture control pressure fan 1 of measured value and outlet air-valve 11.
Air velocity transducer 7 is arranged near in the main ajutage 3 of pressure fan 1, for measuring main ajutage 3Interior wind speed, and the wind velocity signal of measurement is sent to adjuster 12. Pressure sensor 10 is for experiments of measuringAir pressure size in chamber 4, adjuster 12, according to the measured value of pressure sensor 10, controls to adjust out one's intention as revealed in what one saysValve 11, makes the air pressure in laboratory 4 meet the requirements of numerical value.
Import air-valve 8 is arranged on the side near pressure fan 1 on point airduct 5, and import Electric air valve 9 is positioned atDivide the side near laboratory 4 on airduct 5, to adjust for the air intake in laboratory 4 more fastControl. Adjuster 12, according to the use state in laboratory 4, calculates the size of the gas flow of demand, then withActual gas flow comparison, and by regulating the duty of pressure fan 1, make actual gas flow withThe gas flow of demand is consistent; Meanwhile, measured value is sent to adjuster 12, adjuster by pressure sensor 1012 remove to control outlet air-valve 11 according to measured value, make the air pressure in laboratory 4 meet the requirements of numerical value.
In present embodiment, import Electric air valve 9 is while coming into operation in laboratory 4, by adjuster 12Control and open completely, when laboratory 4 is stopped using, close completely. Outlet air-valve 11 is electric adjustable nodal patternEquipment, adopts quick electric operation, and be about 5 seconds its omnidistance running time, to ensure that pressure adjusting can be fastSpeed is carried out.
In adjuster 12, be preset with aperture higher limit and aperture lower limit, adjuster 12 is according to outlet air-valve 11Aperture and the wind speed of the comparative result control pressure fan 1 of aperture higher limit and aperture lower limit. Go out one's intention as revealed in what one saysThe aperture higher limit of valve 11 is directly proportional to laboratory 4 quantity of enabling, outlet air-valve 11 aperture lower limits withLaboratory 4 quantity of enabling are inversely proportional to.
With reference to Fig. 3, after laboratory 4 is enabled, adjuster 12 is controlled import Electric air valve 9 and is opened, then rootDetected value according to air velocity transducer 7 calculates gas flow, and according to the rotating speed of gas flow control pressure fan 1.Adjuster 12 is multiplied by the sectional area of main ajutage 3 by the wind speed that air velocity transducer 7 is measured, calculate realityGas flow in the main ajutage 3 in border.
Gas flow reaches after default gas flow value, by the gas in pressure sensor 10 testing laboratories 4Pressure value, when atmospheric pressure value is in default air pressure range, 12, adjuster detects the aperture of one's intention as revealed in what one says valve 11, andAccording to the testing result of the aperture of outlet air-valve, the rotating speed of pressure fan 1 is regulated; When atmospheric pressure value exceeds in advanceIf air pressure range, 12, adjuster detects the aperture of one's intention as revealed in what one says valve 11, and according to the aperture inspection of outlet air-valveSurveying result regulates the rotating speed of pressure fan 1.
In present embodiment, outlet air-valve 11 is with the output of valve area signal, and adjuster 12 is according to thisThe size of aperture signal, dynamically revises the speed of pressure fan 1, uses the aperture of one's intention as revealed in what one says valve 11 all the timeMaintain in " threshold range ", this " threshold range " refers within the scope of 50%-80%, when outlet air-valveWhen 11 aperture exceedes 80%, the speed of 12 correction pressure fans 1 of adjuster makes its rising; Work as outletWhen the aperture of air-valve 11 is less than 50%, the speed of 12 correction pressure fans 1 of adjuster reduces it, fromRegulate the object without dead band and reach pressure.
In present embodiment, " threshold range " of outlet air-valve 11 apertures, according to the number in laboratory in systemMeasure and adjust accordingly. If the laboratory of enabling 4 quantity are 2-3, set out the aperture of one's intention as revealed in what one says valve 11Higher limit is 75%, outlet air-valve 11 aperture lower limits 50%. If the laboratory of enabling 4 quantity are 4-6Time, the aperture higher limit that exports air-valve 11 is set to 80%, and outlet air-valve 11 aperture lower limits are set to45％。
In present embodiment, adjuster 12 is also connected with exhaust blower 2, and they also can be according to laboratory 4 air-flow needAsk control exhaust blower 2 to work, particularly, when the aperture of outlet air-valve reaches boundary value, and pressure fan 1When rotating speed also reaches critical value, wind speed that can be by regulating exhaust blower 2 to the gas flow in laboratory 4 andAir pressure regulates.
The above, be only preferably detailed description of the invention of the present invention, but not office of protection scope of the present inventionBe limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in, according to thisThe technical scheme of invention and inventive concept thereof are equal to replaces or changes, and all should be encompassed in protection of the present inventionWithin scope.
Claims (9)
1. CIT, without a dead band rapid pressure regulating system, is characterized in that, comprising: pressure fan (1),Exhaust blower (2), main ajutage (3) and at least one wind control mechanism; Wind control mechanism comprises a point airduct (5)And exhaust duct (6);
Main ajutage (3) is connected with pressure fan (1), and the two ends of point airduct (5) are respectively used to connect main sendingAirduct (3) and laboratory (4) air inlet, the two ends of exhaust duct (6) are respectively used to connect laboratory (4)Air outlet and exhaust blower (2); Pressure fan (1) is by main ajutage (3) and divide airduct (5) to each experimentChamber (4) air-supply, exhaust blower (2) is extracted the air in laboratory and is got rid of by exhaust duct (6);
Air velocity transducer (7) for detection of wind speed is installed, on point airduct (5) in main ajutage (3)Be provided with import air-valve (8) and import Electric air valve (9), laboratory is provided with for detection of Indoor Air in (4)The pressure sensor (10) of pressing, exhaust duct (6) is provided with outlet air-valve (11);
Adjuster (12) respectively with pressure fan (1), air velocity transducer (7), import Electric air valve (9),Pressure sensor (10) is connected with outlet air-valve (11); The aperture of import air-valve (8) can be according to laboratory(4) gas flow needing is preset, and adjuster (12) is according to the duty control of laboratory (4)Import Electric air valve processed (9) is opened or is closed, according to pressure sensor (10) detected value control outlet air-valve(11) aperture, and according to the aperture control of the detected value of pressure sensor (10) and outlet air-valve (11)The wind speed of pressure fan processed (1).
2. CIT as claimed in claim 1, without dead band rapid pressure regulating system, is characterized in that, regulatesIn device (12), be preset with aperture higher limit and aperture lower limit, adjuster (12) is according to outlet air-valve (11)Aperture and the wind speed of the comparative result control pressure fan (1) of aperture higher limit and aperture lower limit.
3. CIT as claimed in claim 2, without dead band rapid pressure regulating system, is characterized in that, experimentAfter chamber (4) is enabled, adjuster (12) is controlled corresponding import Electric air valve (9) and is opened, then basisThe detected value of air velocity transducer (7) calculates air quantity, and according to the rotating speed of air quantity control pressure fan (1); WindAmount reaches after default airflow value, by the atmospheric pressure value in pressure sensor (10) testing laboratory (4), whenAtmospheric pressure value is positioned at default air pressure range, detects one's intention as revealed in what one says valve (11) aperture, and according to outlet air-valveMeasuring opening result regulates pressure fan (1) rotating speed; When atmospheric pressure value exceeds default extruding scope, rightOutlet air-valve (11) aperture regulate, and according to outlet air-valve Measuring opening result to pressure fan (1)Rotating speed regulate.
4. CIT as claimed in claim 3, without dead band rapid pressure regulating system, is characterized in that, outletThe aperture higher limit of air-valve (11) is directly proportional to the laboratory of enabling (4) quantity, outlet air-valve (11)Aperture lower limit is inversely proportional to laboratory (4) quantity of enabling.
5. CIT as claimed in claim 4, without dead band rapid pressure regulating system, is characterized in that, enablesLaboratory (4) quantity while being 2-3, the aperture higher limit of outlet air-valve (11) is 75%, goes out one's intention as revealed in what one saysThe aperture lower limit 50% of valve (11).
6. CIT as claimed in claim 4, without dead band rapid pressure regulating system, is characterized in that, enablesLaboratory (4) quantity while being 4-6, the aperture higher limit of outlet air-valve (11) is 80%, goes out one's intention as revealed in what one saysThe aperture lower limit 45% of valve (11).
7. CIT as claimed in claim 3, without dead band rapid pressure regulating system, is characterized in that, regulatesDevice (12) is by acquisition that the sectional area of the detected value of air velocity transducer (7) and main ajutage (3) is multiplied each otherAir quantity.
8. the CIT as described in claim 1 to 7 any one is without dead band rapid pressure regulating system, its featureBe, adjuster (12) is also connected with exhaust blower (2), and its gas flow according to laboratory (4) needsAsk exhaust blower (2) and/or pressure fan (1) work controlled.
9. the CIT as described in claim 1 to 7 any one is without dead band rapid pressure regulating system, its featureBe, import Electric air valve (9) is positioned at the upper side near laboratory of a point airduct (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510968867.0A CN105588302A (en) | 2015-12-17 | 2015-12-17 | CIT dead-zone-free rapid pressure regulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510968867.0A CN105588302A (en) | 2015-12-17 | 2015-12-17 | CIT dead-zone-free rapid pressure regulation system |
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| Publication Number | Publication Date |
|---|---|
| CN105588302A true CN105588302A (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510968867.0A Pending CN105588302A (en) | 2015-12-17 | 2015-12-17 | CIT dead-zone-free rapid pressure regulation system |
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| CN (1) | CN105588302A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314494A (en) * | 2017-08-14 | 2017-11-03 | 广州海科电子科技有限公司 | New blower fan |
| CN108249164A (en) * | 2016-12-29 | 2018-07-06 | 贵州中烟工业有限责任公司 | A kind of application method of vacuum control system |
| CN108263862A (en) * | 2016-12-30 | 2018-07-10 | 贵州中烟工业有限责任公司 | A kind of stem blast system and its vacuum control system |
| CN112959870A (en) * | 2021-03-16 | 2021-06-15 | 成都格力新晖医疗装备有限公司 | Mobile laboratory, and negative pressure control method and device for mobile laboratory |
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| CN1727779A (en) * | 2005-04-27 | 2006-02-01 | 杭州科锐净化工程有限公司 | Biologic cleanliness system and pressure control method |
| JP4429840B2 (en) * | 2004-08-10 | 2010-03-10 | 株式会社奥村組 | Inter-room airflow control system |
| CN203541053U (en) * | 2013-09-17 | 2014-04-16 | 安徽华盛科技控股股份有限公司 | CIT energy-saving control system for fume cupboards |
| CN103982974A (en) * | 2014-04-22 | 2014-08-13 | 天长市华盛科技装饰有限公司 | Cit intelligent ventilation control system |
| CN204388297U (en) * | 2014-12-24 | 2015-06-10 | 南京健友生化制药股份有限公司 | A kind of differential pressure self-balancing device |
| CN204695147U (en) * | 2015-05-25 | 2015-10-07 | 上海琨聚电子科技有限公司 | A kind of laboratory environment supervising device |
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| JP4429840B2 (en) * | 2004-08-10 | 2010-03-10 | 株式会社奥村組 | Inter-room airflow control system |
| CN1727779A (en) * | 2005-04-27 | 2006-02-01 | 杭州科锐净化工程有限公司 | Biologic cleanliness system and pressure control method |
| CN203541053U (en) * | 2013-09-17 | 2014-04-16 | 安徽华盛科技控股股份有限公司 | CIT energy-saving control system for fume cupboards |
| CN103982974A (en) * | 2014-04-22 | 2014-08-13 | 天长市华盛科技装饰有限公司 | Cit intelligent ventilation control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249164A (en) * | 2016-12-29 | 2018-07-06 | 贵州中烟工业有限责任公司 | A kind of application method of vacuum control system |
| CN108263862A (en) * | 2016-12-30 | 2018-07-10 | 贵州中烟工业有限责任公司 | A kind of stem blast system and its vacuum control system |
| CN107314494A (en) * | 2017-08-14 | 2017-11-03 | 广州海科电子科技有限公司 | New blower fan |
| CN112959870A (en) * | 2021-03-16 | 2021-06-15 | 成都格力新晖医疗装备有限公司 | Mobile laboratory, and negative pressure control method and device for mobile laboratory |
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Application publication date: 20160518 |