CN100422648C - Control device for a fume extraction device - Google Patents
Control device for a fume extraction device Download PDFInfo
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- CN100422648C CN100422648C CNB2004800095699A CN200480009569A CN100422648C CN 100422648 C CN100422648 C CN 100422648C CN B2004800095699 A CNB2004800095699 A CN B2004800095699A CN 200480009569 A CN200480009569 A CN 200480009569A CN 100422648 C CN100422648 C CN 100422648C
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- pressure
- room
- ventilating fan
- air
- interior
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Sampling And Sample Adjustment (AREA)
- Saccharide Compounds (AREA)
Abstract
A fume extraction device comprises a fan (3) for extracting fume-laden air from a room (5) and for conveying the extracted air to an area (9) located outside of the room (5). The fume extraction device comprises a pressure difference detection device (10) for detecting the pressure difference (Pd) between the inside pressure (Pi) in the room (5) and the outside pressure (Pa) in the area (9) located outside the room (5). The fume extraction device also comprises a control device (11) for controlling the air conveying capacity of the fan (3) according to the pressure difference (Pd).
Description
The present invention relates to a kind of fume extraction device and a kind of method that is used to control a fume extraction device.
In order to see the air that has smog and moisture off, preferably fume extraction device is installed in the top of cooking position in the kitchen from cooking position.Therefore, people are divided into fume extraction device circulating air cover and hood usually, and described circulating air cover is taken the locational air of the cooking away, this air filtered and it is led get back in the room; And hood is taken described air away, this air is filtered and is sent to outside the room.
A kind of hood in the existing room is worked above an open cooking stove, therefore has the danger in the waste gas suction room that the cooking stove place is produced.For fear of this situation occurring, background technology has proposed a variety of solutions.
DE 10028333A1 provides a kind of safe wireless electric switchgear that air-exhaust type smog is discharged cover that is used for, and wherein after finding out that air-supply valve or other air outlet, for example window or door are closed, cuts off smog and discharges cover.Realized sending with wireless system about the signal of whether closing air-supply valve, air-supply window or door.
DE 3040051A1 provides a kind of control device that air draft-air circulation-smog is discharged cover that is used for, and wherein controls air draft or air circulation according to the pressure of air in the room.
JP 08170846A provides a kind of smog to discharge cover, wherein is provided with a pressure sensor in air exhaust passage.When the pressure of air draft is lower than a predetermined value, do not open the control of kitchen window or door, and then make the Air Blast fan running, so that air is imported in the kitchen, avoid occurring in the kitchen excessive negative pressure.
JP 06347081A provides a kind of kitchen air-supply exhaust system that smog is discharged cover that has, and wherein controls described air-supply by an air-supply throttle, so that avoid occurring in the kitchen negative pressure.
DE 9208718U1 provides a kind of smog that has an air exhaust passage and a circulation canal to discharge cover, and this discharge cover is connected to each other by a choke valve.If the pressure in the kitchen sharply descends, the gas of discharge will directly flow back in the circulation canal by choke valve and also get back in the kitchen thus.
DE 9101095U1 provides a kind of fume extraction device that has the volume flow measuring mechanism, and this volume flow measuring mechanism is by the pressure differential acquired information between blast pipe and the hood surrounding environment, and the air volume flow of determining to pass hood thus.This mechanism monitors the air-flow of discharging by exhaust, and when air volume flow surpass or be lower than the limit and make hood be in can not trouble free service state the time, warn the user of hood with acoustics and optical mode.
DE 3925975C2 provides a kind of and has been used for that smog is discharged cover to adopt circulating air to drive still be the conversion equipment that exhaust gas drive is selected, wherein automatically handle a converter by a control device of under the duty of the heater that links to each other with chimney, surveying, like this, make smog discharge cover in the heater in being in work and convert the circulating air driving to.Described converter can be valve that is driven for example.
DE 1781986U1 provides a kind of air valve that is used for fan, and described fan is installed in the room with oil oven, and a valve that makes ventilation of room wherein is set, and this valve is opened when fan starts, so that air the room.
The scheme that these background technologies are described is because all very bothersome mostly, therefore unsatisfactory.
The purpose of this invention is to provide a kind of fume extraction device and a kind of method that is used to drive a fume extraction device, wherein can in the room that has an open cooking stove, realize that in mode dependable performance and simple the safety of fume extraction device drives.
This purpose can realize by a kind of control device, promptly be used for one have a ventilating fan, be arranged on the control device that an air-exhaust type fume extraction device in the room uses, this control device comprises: a differential pressure measurement mechanism, and it is used for measuring the interior pressure in room and the pressure reduction between the external pressure in the perimeter, room; A controlling organization, it is used for the power of supplying gas according to the pressure reduction control fume extraction device that records.
This purpose can also realize by a kind of fume extraction device, it comprises a ventilating fan, this ventilating fan is used for taking away the air that has smog in a room, the air of also handle extraction is delivered to a zone of outside, room, one of them differential pressure measurement mechanism, it is used for measuring the interior pressure in room and the pressure reduction between the external pressure in the perimeter, room; A controlling organization, it is used for the power of supplying gas according to the pressure reduction control ventilating fan that records.
This purpose can also realize by a kind of method that is used to drive a kind of fume extraction device, this fume extraction device has a ventilating fan, this ventilating fan is used for extracting the air that has the air of smog and will extract out out from the room and delivers to the zone of outside, room, wherein, measure interior pressure in the room and the pressure reduction between the external pressure in the perimeter, room, and according to the power of supplying gas of the pressure reduction control ventilating fan that records.
Have a ventilating fan and be located in the fume extraction device in the room and can use a control device at one, this control device has differential pressure measurement mechanism and controlling organization that is used for according to the pressure reduction control fume extraction device air transmission power that records of pressure reduction between the external pressure of the interior pressure that is used for measuring in the room and perimeter, room, open cooking stove work in the room, make in the room when negative pressure reaches a kind of degree of danger, can reduce gas pushing quantity by this control device.
In described fume extraction device, will discharge in the room that air delivers into, measure in the zone of interior pressure in this room and outside, room pressure reduction between the external pressure, its advantage is, the influence of air pressure fluctuation or be not subjected to the influence of installation site height in the time of can not being subjected to Changes in weather always keeps the balance between the external pressure of interior pressure in the room and outside, room.That is to say that control device or the fume extraction device that is provided with this class control device can be worked safely and reliably, and do not need to calibrate or readjust on all installation sites.
In addition, described measuring mechanism is very simple, and thereby cost lower.In a preferred embodiment of the invention, described differential pressure measurement mechanism has an interior pressure sensor and outer pressure sensor and one and is used for comparison mechanism that the interior pressure that records and the external pressure that records are compared.
In a preferred embodiment of the present invention, described differential pressure measurement mechanism has a first sensor circuit (Fuehlerleitung) and one second sensor line, this first sensor circuit is installed the room with equipment and is linked to each other, and this second sensor line links to each other with the zone of outside, room.
In a kind of preferred implementation of the present invention, preferably described differential pressure measurement mechanism is installed on the fume extraction device in the room or is installed in the perimeter, room or partly is installed in the room and partly is installed in the perimeter, room.
By means of set structure, the measurement between the external pressure in pressure and the room exterior domain in can realizing very simply.
In a kind of preferred embodiment, described differential pressure measurement mechanism has a film, and this film links to each other with the room by a first sensor circuit on a side and pass through one second sensor line on the another side and links to each other with the room exterior domain.Therefore, this film is subjected to the pressure effect in the room and is subjected to the effect of room external pressure on the another side on a side.This structure is simple especially and cost is low, particularly, when with first and or second sensor line especially true when being designed to a kind of flexible line.
In a kind of preferred implementation, will be used for carrying the pipeline of the air that has smog to be arranged on the zone of outside, room, and second sensor line will be laid along the pipeline in the perimeter, room, or be arranged in the pipeline of this perimeter, room.Therefore, for second sensor line, can utilize a wall-through hole that has existed or a pipeline that is used to lay described sensor line that has existed.
In a kind of preferred implementation, described control device is the control ventilating fan in regulating loop preferably so, press in making and be not less than a kind of predetermined pressure differential threshold that is preferably 4 Pascals with respect to external pressure, perhaps when interior pressure is lower than the predetermined pressure differential threshold that is preferably 4 Pascals with respect to external pressure, ventilating fan is turn-offed, and when interior pressure is higher than predetermined pressure differential threshold once more with respect to external pressure, ventilating fan is connected.
In a kind of preferred implementation of the present invention, be provided with the alarm signal output mechanism, force down when being preferably 4 Pascals' threshold pressure differential when interior, described alarm signal output mechanism produces alarm signal.
The alarm signal of described output can be the audible ringing signal that is preferably interrupted chimes of doom form, or is preferably the optical signalling of flicker ruddiness form, or the prompting user " windows " or the optical signalling of the display format of " ventilation of room ".
Other features and advantages of the present invention can be from following with reference to obtaining the description of accompanying drawing to embodiment.
This accompanying drawing is represented an air-exhaust type fume extraction device in the room.
With reference to the accompanying drawings, described fume extraction device 1 has a shell 2, a ventilating fan 3 and a control device 4.Press in fume extraction device 1 is arranged on and be P
iThe tops of an interior cooking positions 6, a room 5.It is P that the air that fume extraction device 1 will have smog and moisture by a pipeline 7 that passes a porthole 8 is delivered to external pressure
aRoom 5 outside a zone 9 in.
Control device 4 has a differential pressure measurement mechanism 10 and a controlling organization 11, and this controlling organization 11 is used for basis by 10 measured, the interior pressure P of differential pressure measurement mechanism
iWith external pressure P
aBetween pressure reduction control ventilating fan 3.In addition, described control device also has an alarm signal output mechanism 12, and this alarm signal output mechanism is at interior pressure P
iAnd P
aBetween pressure reduction can export an alarm signal when reaching predetermined threshold.
Differential pressure measurement mechanism 10 has a pressure sensor that preferably constitutes as film, and a side of this pressure sensor links to each other with room 5 by a first sensor circuit 14, presses P in being subjected to thus
iEffect; And the another side links to each other with the zone 9 of 5 outsides, room by one second sensor line 15, and is subjected to external pressure P thus
aEffect.Described first and second sensor lines 14 and 15 are made by the flexible line of flexibility.
In this case, differential pressure measurement mechanism 10 can be P by described first sensor circuit 14 and second sensor line, 15 gaging pressures
iRoom 5 and pressure be P
a5 perimeters 9, room in pressure differential between the pressure.Because a fume extraction device extracts a large amount of air from room 5, therefore room 5 in, form a negative pressure, this causes must be by the slit on door and the window the air of 5 extractions draw once again and get back in the room 5 from the room.When the open cooking stove that is provided with in the room 5 with a chimney, the danger of existence is, can suck back in the room 5 through described chimney by the negative pressure that forms in room 5 smog and the waste gas with open cooking stove.Experience shows, the interior pressure P in room 5
iThan the external pressure P in the zone 9 of 5 outsides, room
aWhen hanging down 4 Pascals, in the room, carry the grave danger of waste gas with fume extraction device occurring.
When information that control device 4 is received from differential pressure measurement mechanism 10 shows that negative pressure the room 5 surpasses 4 Pascals' threshold pressure differential, described control device will make ventilating fan disconnect, and, notify user, for example cooking person to open room air-breather, for example window or door thus by alarm signal of alarm output device 12 outputs.When differential pressure measurement mechanism 10 determines, the negative pressure in the room 5 are reduced to 4 Pascals' threshold pressure differential when following once again, and control device 4 will be once again with ventilating fan 3 connections.When surpassing 4 Pascals' threshold pressure differential, replace and disconnect ventilating fan, control device 4 can so turn down ventilating fan 3 rotating speed, and so turn down the gas pushing quantity of ventilating fan 3 thus, thereby make the threshold pressure differential that can not surpass 4 Pascals.In this way, can keep certain rate of air sucked in required, a kind of so-called emergency operation of fume extraction device, wherein guarantee required security simultaneously.
As alarm signal output mechanism 12, can be arranged to preferably produce the buzzer of interrupted chimes of doom, or for example be the optical signalling of flash red light, and/or show for example display of indication such as " room ventilation " or " opening the window " with luminous form.
The control device 4 that comprises differential pressure measurement mechanism 10 and controlling organization 11 can be used as a unit renovation and is equipped in the existing smog discharge cover, wherein need only be laid in the zone 9 of 5 outsides, room, and must correspondingly fan 3 be electrically connected with control device 4 by second sensor line 15 of pipeline 7 with a flexible pipe form.
Be used for measuring the interior pressure P in room 5
iAnd the pressure differential P between the external pressure in the zone 9 of 5 outsides, room
dDifferential pressure measurement mechanism 10 can not be arranged to aforesaid film, be used for comparison mechanism that the interior pressure that records and the external pressure that records are compared but have an interior pressure sensor (not shown), outer pressure sensor (not shown) and one.
Claims (27)
1. be used for one have a ventilating fan (3), be arranged on the control device that the air-exhaust type fume extraction device in the room (5) uses, this control device comprises:
A differential pressure measurement mechanism (10), it is used for measuring the interior pressure (P in room (5)
1) and perimeter, room (5) (9) in external pressure (P
a) between pressure reduction (P
d);
A controlling organization (11), it is used for according to the pressure reduction (P that records
d) control fume extraction device the power of supplying gas.
2. fume extraction device, it comprises a ventilating fan (3), this ventilating fan is used for taking away the air that has smog, and an air of extracting out is delivered to an outside zone (9), room (5) in a room (5), it is characterized in that
A differential pressure measurement mechanism (10), it is used for measuring the interior pressure (P in room (5)
1) and perimeter, room (5) (9) in external pressure (P
a) between pressure reduction (P
d);
A controlling organization (11), it is used for according to the pressure reduction (P that records
d) control ventilating fan (3) the power of supplying gas.
3. according to the described device in one of claim 1 or 2, it is characterized in that described differential pressure measurement mechanism (10) has an interior pressure sensor, an outer pressure sensor and an interior pressure that is used for relatively recording and the comparison mechanism of the external pressure that records.
4. according to the described device in one of claim 1 or 2, it is characterized in that, differential pressure measurement mechanism (10) links to each other with room (5) by a first sensor circuit (14), and links to each other with the perimeter (9) of room (5) by one second sensor line (15).
5. device according to claim 1 and 2, it is characterized in that described differential pressure measurement mechanism (10) is arranged in the room (5) or is arranged in the outside zone (9), room (5) or partly is arranged in the room (5) and partly is arranged in the outside zone (9), room (5).
6. device according to claim 1 and 2, it is characterized in that, described differential pressure measurement mechanism (10) has a film, this film links to each other with room (5) by a first sensor circuit (14) on a side, and links to each other by the outside zone (9) in one second sensor line (15) and room (5) on the another side.
7. device according to claim 4 is characterized in that, described first and/or second sensor line (14,15) is a flexible line.
8. device according to claim 4, it is characterized in that, be provided with a pipeline (7) that is used for the air that has smog is directed to outside zone (9), room (5), and described second sensor line (15) is laid or is arranged in this pipeline (7) along the pipeline (7) in room (5) outside zone (9).
9. device according to claim 1 and 2 is characterized in that, described controlling organization (11) control ventilating fan (3) makes external pressure (P
a) and interior pressure (P
1) between pressure reduction be less than or equal to predetermined pressure differential threshold (P
d) be P
a-P
1≤ P
d, or as external pressure (P
a) and interior pressure (P
1) between pressure reduction greater than predetermined pressure differential threshold (P
d) be P
a-P
1＞P
dThe time, ventilating fan is disconnected, as external pressure (P
a) and interior pressure (P
1) between pressure reduction less than predetermined pressure differential threshold (P
d) be P
a-P
1＜P
dThe time, ventilating fan (3) is connected.
10. device according to claim 1 and 2 is characterized in that, is provided with an alarm signal output mechanism (12), as external pressure (P
a) and interior pressure (P
i) between pressure reduction greater than predetermined pressure differential threshold (P
d) be P
a-P
1＞P
dThe time, described alarm signal output mechanism (12) is with output alarm signal.
11. device according to claim 10, it is characterized in that, the alarm signal of described output is a kind of audible ringing signal, and/or is a kind of optical signalling of preferably flash red light form, and/or " opens the window " or the optical signalling of " ventilation of room " form for a kind of demonstration.
12. device according to claim 5, it is characterized in that described differential pressure measurement mechanism (10) is arranged in the room (5) or is arranged in the outside zone (9), room (5) or partly is arranged in the room (5) and partly is arranged in the outside zone (9), room (5).
13. device according to claim 12 is characterized in that, described first and/or second sensor line (14,15) is a flexible line.
14. device according to claim 12, it is characterized in that, be provided with a pipeline (7) that is used for the air that has smog is directed to outside zone (9), room (5), and described second sensor line (15) is laid or is arranged in this pipeline (7) along the pipeline (7) in room (5) outside zone (9).
15. device according to claim 6 is characterized in that, described first and/or second sensor line (14,15) is a flexible line.
16. device according to claim 6, it is characterized in that, be provided with a pipeline (7) that is used for the air that has smog is directed to outside zone (9), room (5), and described second sensor line (15) is laid or is arranged in this pipeline (7) along the pipeline (7) in room (5) outside zone (9).
17. device according to claim 5 is characterized in that, described differential pressure measurement mechanism (10) is arranged on the fume extraction device.
18. device according to claim 9 is characterized in that, ventilating fan (3) is located in the regulating loop, predetermined pressure differential threshold (P
d) be 4 Pascals.
19. device according to claim 10 is characterized in that, predetermined pressure differential threshold (P
d) be 4 Pascals.
20. device according to claim 11 is characterized in that, the alarm signal of described output is a kind of audible ringing signal of interrupted chimes of doom form.
21. be used to drive a kind of method of fume extraction device, this fume extraction device has a ventilating fan (3), this ventilating fan is used for extracting the air that has the air of smog and will extract out out from room (5) to be delivered to the outside zone (9), room (5), it is characterized in that
Measure the interior pressure (P in the room (5)
1) and perimeter, room (5) (9) in external pressure (P
d) between pressure reduction (P
d), and
According to the pressure reduction (P that records
d) control ventilating fan (3) the power of supplying gas.
22. method according to claim 21 is characterized in that, so controls the power of supplying gas of ventilating fan (3): make external pressure (P
a) and interior pressure (P
1) between pressure reduction be less than or equal to predetermined pressure differential threshold (P
d) be P
a-P
1≤ P
d
23. method according to claim 22 is characterized in that,
As external pressure (P
a) and interior pressure (P
1) between pressure reduction greater than predetermined pressure differential threshold (P
d) be P
a-P
1＞P
dThe time, ventilating fan is disconnected, as external pressure (P
a) and interior pressure (P
1) between pressure reduction less than predetermined pressure differential threshold (P
d) be P
a-P
1＜P
dThe time, ventilating fan (3) is connected.
24. according to the described method of one of claim 21 to 22, it is characterized in that,
As external pressure (P
a) and interior pressure (P
1) between pressure reduction greater than predetermined pressure differential threshold (P
d) be P
a-P
1＞P
dThe time, described alarm signal output mechanism (12) is output alarm signal,
As external pressure (P
a) and interior pressure (P
1) between pressure reduction less than predetermined pressure differential threshold (P
d) be P
d-P
1＜P
dThe time, close alarm signal.
25. method according to claim 22 is characterized in that, predetermined pressure differential threshold (P
d) be 4 Pascals.
26. method according to claim 23 is characterized in that, predetermined pressure differential threshold (P
d) be 4 Pascals.
27. method according to claim 24 is characterized in that, predetermined pressure differential threshold (P
d) be 4 Pascals.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10316571.1 | 2003-04-10 | ||
| DE10316571A DE10316571A1 (en) | 2003-04-10 | 2003-04-10 | Control device for an extractor hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1791771A CN1791771A (en) | 2006-06-21 |
| CN100422648C true CN100422648C (en) | 2008-10-01 |
Family
ID=33038993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800095699A Expired - Fee Related CN100422648C (en) | 2003-04-10 | 2004-04-13 | Control device for a fume extraction device |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20070163570A1 (en) |
| EP (1) | EP1625329B1 (en) |
| CN (1) | CN100422648C (en) |
| AT (1) | ATE434156T1 (en) |
| DE (2) | DE10316571A1 (en) |
| NO (1) | NO20055303L (en) |
| WO (1) | WO2004090426A1 (en) |
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| DE102006024658A1 (en) * | 2006-05-22 | 2007-11-29 | Werner Pauen | Device for extractor hoods for alternating operation between circulating air and extract air, depending on the outside temperature |
| DE102006057545A1 (en) * | 2006-12-06 | 2008-06-12 | BSH Bosch und Siemens Hausgeräte GmbH | Extractor hood with display device |
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| IT1399000B1 (en) * | 2010-03-24 | 2013-03-28 | Tecnowind S P A | HOOD FOR KITCHEN AND RELATIVE METHOD OF CONTROL. |
| DE102011120503B4 (en) | 2011-12-07 | 2013-08-29 | Uwe Woweries | Device for controlling a fume hood with simultaneous operation of an atmospheric fireplace |
| CN102589025B (en) * | 2012-02-17 | 2014-06-11 | 宁波方太厨具有限公司 | Fan speed adaptive regulation device of range hood and control method thereof |
| DE202012006361U1 (en) | 2012-07-03 | 2013-10-09 | Broko Gmbh Elektroproduktion Und Vertrieb | Safety device for an exhaust air system |
| CN104865991A (en) * | 2014-11-21 | 2015-08-26 | 苏州工业园区设计研究院股份有限公司 | Serviced apartment concentrated oil-smoke emission control system and control method thereof |
| CN106287889B (en) * | 2016-09-30 | 2018-11-06 | 宁波方太厨具有限公司 | The rotation speed of fan Automatic adjustment method of range hood and the regulating device for realizing this method |
| DE102018211923A1 (en) * | 2018-07-18 | 2020-01-23 | Robert Bosch Gmbh | Process for operating a ventilation system |
| DK3667176T3 (en) * | 2018-12-11 | 2024-03-04 | Franke Futurum Ab | CAP, METHOD OF OPERATING A CAP |
| CN113494727B (en) * | 2020-04-08 | 2024-05-10 | 杭州老板电器股份有限公司 | Air quantity adjusting method and device of smoke discharging system, terminal and smoke discharging system |
| CN112178720B (en) * | 2020-09-18 | 2022-11-04 | 华帝股份有限公司 | Control method of smoke collection and exhaust machine and smoke collection and exhaust system applying control method |
| CN112426025B (en) * | 2020-10-21 | 2022-04-05 | 华帝股份有限公司 | Exhaust control method of cooking equipment after cooking is finished and cooking equipment |
| CN113864923B (en) * | 2021-10-11 | 2022-11-04 | 广东美的制冷设备有限公司 | Control method of air conditioning apparatus, controller, and computer-readable storage medium |
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- 2003-04-10 DE DE10316571A patent/DE10316571A1/en not_active Withdrawn
-
2004
- 2004-04-13 DE DE502004009615T patent/DE502004009615D1/en not_active Expired - Lifetime
- 2004-04-13 EP EP04726990A patent/EP1625329B1/en not_active Expired - Lifetime
- 2004-04-13 AT AT04726990T patent/ATE434156T1/en active
- 2004-04-13 CN CNB2004800095699A patent/CN100422648C/en not_active Expired - Fee Related
- 2004-04-13 WO PCT/EP2004/003885 patent/WO2004090426A1/en active Application Filing
- 2004-04-13 US US10/552,170 patent/US20070163570A1/en not_active Abandoned
-
2005
- 2005-11-10 NO NO20055303A patent/NO20055303L/en unknown
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| US4552059A (en) * | 1984-09-18 | 1985-11-12 | Cambridge Engineering, Inc. | Flow measurement for exhaust-type canopy and ventilating hood |
| DE9101095U1 (en) * | 1991-01-31 | 1991-04-18 | INVENT GmbH - Entwicklung neuer Technologien, 8520 Erlangen | Device for displaying the respective volume flow in a fume hood |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2004090426A1 (en) | 2004-10-21 |
| CN1791771A (en) | 2006-06-21 |
| EP1625329B1 (en) | 2009-06-17 |
| DE10316571A1 (en) | 2004-10-28 |
| EP1625329A1 (en) | 2006-02-15 |
| DE502004009615D1 (en) | 2009-07-30 |
| NO20055303L (en) | 2005-11-10 |
| US20070163570A1 (en) | 2007-07-19 |
| ATE434156T1 (en) | 2009-07-15 |
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Granted publication date: 20081001 Termination date: 20140413 |