EP1276541A1 - Volumetric control for blower filter devices - Google Patents
Volumetric control for blower filter devicesInfo
- Publication number
- EP1276541A1 EP1276541A1 EP01933612A EP01933612A EP1276541A1 EP 1276541 A1 EP1276541 A1 EP 1276541A1 EP 01933612 A EP01933612 A EP 01933612A EP 01933612 A EP01933612 A EP 01933612A EP 1276541 A1 EP1276541 A1 EP 1276541A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- measuring points
- fan
- behind
- volume control
- measuring
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/006—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort with pumps for forced ventilation
Definitions
- the invention relates to a volume control for blower filter devices, which is particularly suitable for a hood connection for ventilation.
- Blower filter devices according to the known prior art have the problem that the flow rate of the air that is supplied to the hood varies depending on the degree of clogging of the filter. If the filter is new and clean, more air will pass through the filter than required by the standards in a given individual case. Similar problems arise when using different filters.
- Another problem is that the air volume flow is influenced by the type of breathing connection.
- EP 0352938 A2 proposes to measure the difference zdrack between a measuring point in front of and a measuring point behind the fan wheel of the fan and to use this signal to control the fan speed.
- EP 0 62 10 56 AI provides for the back pressure to be measured at the outlet of the blower filter device.
- the dynamic pressure is generated by the flow resistance of the hood and can also serve as a measure of the air volume flow.
- another sensor in the form of a thermistor in a secondary duct, which is to monitor the specified limit values for the air volume flow and to trigger an alarm signal when the temperature falls below.
- FI 80606 From FI 80606 an arrangement is known which uses the fan motor as a detector, so that the electrical control circuit measures the current required by the fan motor and the effective voltage at its poles.
- the arrangement uses the properties centrifugal fan such that the flow rate of the air flowing through the fan per unit of time is proportional to the torque of the rotor and, moreover, the pressure difference is proportional to the speed of rotation.
- This solution is further developed by DE 195 02 360 AI in such a way that the performance of the fan is regulated on the basis of the current and the rotational speed of the fan.
- the object of the invention is to keep the volume flow constant within limit ranges regardless of the filters and hoods used. This object is achieved with the characterizing features of claim 1, advantageous embodiments are the subject of the dependent claims.
- the invention provides that at least two measuring points in the air flow behind the fan wheel and in front of the consumer, in particular the respiratory protection hood are arranged.
- the measuring points in the air flow are located inside the housing filter device behind the fan wheel and in front of the fan filter device outlet.
- the pressure measuring sensors as well as the control technology with energy supplier can be optimally combined with the blower filter unit in a compact unit.
- the pressure difference is compared in the control unit with predefined limit values. If the pressure difference is outside the specified limit values, a change in the fan output attempts to regulate the air volume flow to the desired level (e.g. 125 1 / min to 140 1 / min). If this does not succeed, a signaling device is activated which warns the user. This can be done via a measuring device which is coupled to the fan in such a way that the signal device is activated when the limit values of the fan power are exceeded or fallen below, or the signal device is coupled to the control unit in such a way that it is activated when a predetermined differential pressure exceeds - or falls below.
- a measuring device which is coupled to the fan in such a way that the signal device is activated when the limit values of the fan power are exceeded or fallen below, or the signal device is coupled to the control unit in such a way that it is activated when a predetermined differential pressure exceeds - or falls below.
- the volume control for blower filter devices consists of measuring points 1, 2, which are located in the air flow within the housing filter device behind the air wheel 3 and in front of the blower filter device outlet to the breathing hose 8.
- Pressure sensors are arranged at the measuring points 1, 2, the differential pressure of which is determined by a control unit 5 and converted into a control signal for the fan power. If leveling of the air volume flow to a desired level is not possible in this way, a signal device 6 is activated.
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Compressor (AREA)
- Measuring Volume Flow (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000121581 DE10021581B4 (en) | 2000-04-27 | 2000-04-27 | Volume control for fan filter units |
DE10021581 | 2000-04-27 | ||
PCT/DE2001/001456 WO2001080952A1 (en) | 2000-04-27 | 2001-04-06 | Volumetric control for blower filter devices |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1276541A1 true EP1276541A1 (en) | 2003-01-22 |
EP1276541B1 EP1276541B1 (en) | 2008-11-05 |
Family
ID=7640673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01933612A Expired - Lifetime EP1276541B1 (en) | 2000-04-27 | 2001-04-06 | Volumetric control for blower filter devices |
Country Status (6)
Country | Link |
---|---|
US (1) | US6953318B2 (en) |
EP (1) | EP1276541B1 (en) |
AT (1) | ATE413213T1 (en) |
AU (2) | AU2001260062B2 (en) |
DE (2) | DE10021581B4 (en) |
WO (1) | WO2001080952A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7332275B2 (en) | 1999-10-13 | 2008-02-19 | Sequenom, Inc. | Methods for detecting methylated nucleotides |
US7810492B2 (en) | 2003-03-27 | 2010-10-12 | Helmet Integrated Systems Limited | Respirator |
GB2399758A (en) * | 2003-03-27 | 2004-09-29 | Helmet Integrated Syst Ltd | Respirator with means for controlling a fan in response to a measured flow rate |
ES2767176T3 (en) * | 2009-07-17 | 2020-06-16 | CleanSpace IP Pty Ltd | Respirator |
GB2472592A (en) | 2009-08-11 | 2011-02-16 | 3M Innovative Properties Co | A control unit for respirator |
GB2474917B (en) * | 2009-11-02 | 2015-12-23 | Scott Health & Safety Ltd | Improvements to powered air breathing apparatus |
US8453646B2 (en) * | 2009-12-22 | 2013-06-04 | Honeywell International Inc. | Sensor apparatus and method to regulate air flow in a powered air purifying respirator |
US9192795B2 (en) | 2011-10-07 | 2015-11-24 | Honeywell International Inc. | System and method of calibration in a powered air purifying respirator |
US9808656B2 (en) | 2012-01-09 | 2017-11-07 | Honeywell International Inc. | System and method of oxygen deficiency warning in a powered air purifying respirator |
DE102013006915B4 (en) | 2013-04-20 | 2018-07-19 | Dräger Safety AG & Co. KGaA | PAPR |
DE102013016600B4 (en) * | 2013-10-07 | 2019-03-21 | Dräger Safety AG & Co. KGaA | Blower filter device, respiratory protection system and method |
DE102015003385B4 (en) | 2015-03-17 | 2018-07-19 | Dräger Safety AG & Co. KGaA | Powered Air Purifying Respiratory System |
DE102015122316A1 (en) * | 2015-12-18 | 2017-06-22 | Alfred Kärcher Gmbh & Co. Kg | Portable custom air purification system |
US10888721B2 (en) * | 2016-07-28 | 2021-01-12 | Design West Technologies, Inc. | Breath responsive powered air purifying respirator |
US10960237B2 (en) | 2017-07-19 | 2021-03-30 | Honeywell International Inc. | Powered air-purifying respirator (PAPR) with eccentric venturi air flow rate determination |
CN113842528B (en) * | 2020-06-28 | 2023-08-22 | 南京理工大学 | Differential pressure controlled high flow ventilation method and system |
CN112169207B (en) * | 2020-09-29 | 2022-04-15 | 深圳市大雨创新实业有限公司 | Automatic air quantity speed regulating method |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60247095A (en) * | 1984-05-22 | 1985-12-06 | Matsushita Electric Ind Co Ltd | Fan |
FI80606C (en) | 1987-10-05 | 1990-07-10 | Kemira Oy | FOERFARANDE FOER REGLERING AV LUFTMAONGDEN SOM MATAS IN I EN GASMASK SAMT EN GASMASK SOM GENOMFOER DENNA FOERFARANDE. |
EP0352938B1 (en) * | 1988-07-26 | 1993-10-06 | RACAL HEALTH & SAFETY LIMITED | Breathing apparatus |
FR2680467B1 (en) * | 1991-08-21 | 1997-04-04 | Intertechnique Sa | RESPIRATORY PROTECTION EQUIPMENT AGAINST POLLUTANTS. |
DE4207533C2 (en) | 1992-03-10 | 1994-03-31 | Draegerwerk Ag | Respirator with breathing air return |
GB9307733D0 (en) * | 1993-04-14 | 1993-06-02 | Msa Britain Ltd | Respiratory protective device |
JPH0874787A (en) * | 1994-09-09 | 1996-03-19 | Miura Co Ltd | Blast quantity control method of blower |
DE19502360C1 (en) | 1995-01-26 | 1996-03-07 | Becker Gmbh | Rapid access method for programme-specific data in broadcasting equipment |
AUPN191095A0 (en) * | 1995-03-23 | 1995-04-27 | Safety Equipment Australia Pty Ltd | Positive air-purifying respirator management system |
AUPO163896A0 (en) * | 1996-08-14 | 1996-09-05 | Resmed Limited | Determination of respiratory airflow |
-
2000
- 2000-04-27 DE DE2000121581 patent/DE10021581B4/en not_active Expired - Fee Related
-
2001
- 2001-04-06 AT AT01933612T patent/ATE413213T1/en not_active IP Right Cessation
- 2001-04-06 AU AU2001260062A patent/AU2001260062B2/en not_active Ceased
- 2001-04-06 US US10/258,224 patent/US6953318B2/en not_active Expired - Fee Related
- 2001-04-06 WO PCT/DE2001/001456 patent/WO2001080952A1/en active IP Right Grant
- 2001-04-06 DE DE50114472T patent/DE50114472D1/en not_active Expired - Lifetime
- 2001-04-06 AU AU6006201A patent/AU6006201A/en active Pending
- 2001-04-06 EP EP01933612A patent/EP1276541B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0180952A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE413213T1 (en) | 2008-11-15 |
DE10021581A1 (en) | 2001-11-15 |
AU2001260062B2 (en) | 2005-08-18 |
US6953318B2 (en) | 2005-10-11 |
WO2001080952A1 (en) | 2001-11-01 |
US20030180149A1 (en) | 2003-09-25 |
DE10021581B4 (en) | 2005-01-13 |
AU6006201A (en) | 2001-11-07 |
EP1276541B1 (en) | 2008-11-05 |
DE50114472D1 (en) | 2008-12-18 |
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