EP0880767A1 - Vorrichtung und verfahren zum enteisen einer ansaugöffnung - Google Patents
Vorrichtung und verfahren zum enteisen einer ansaugöffnungInfo
- Publication number
- EP0880767A1 EP0880767A1 EP97904439A EP97904439A EP0880767A1 EP 0880767 A1 EP0880767 A1 EP 0880767A1 EP 97904439 A EP97904439 A EP 97904439A EP 97904439 A EP97904439 A EP 97904439A EP 0880767 A1 EP0880767 A1 EP 0880767A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening
- suction
- suction opening
- elastic
- intake
- 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
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000010257 thawing Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 12
- 210000002445 nipple Anatomy 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 34
- 238000010304 firing Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010061216 Infarction Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007574 infarction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
- G08B17/113—Constructional details
Definitions
- the present invention relates to a device and a method for defrosting an intake opening in an intake duct of a fire detection system, through which room or device air is drawn in and fed to a detector for recognizing a fire parameter.
- Fire detection devices are also known, for example, under the technical term "facility protection systems". Typical areas of application for fire detection devices are EDP systems and in particular individual components thereof, and similar electronic devices, such as, for example, measuring, control and regulating systems, switching devices and private branch exchanges and the like.
- the term "fire parameter" is understood to mean physical parameters which are subject to measurable changes in the vicinity of an incipient fire, e.g. the ambient temperature, the solids or liquid or gas content in the ambient air (formation of smoke - particles or aerosols - or steam) or the ambient radiation.
- a fire detection device branches off a representative subset of the device cooling air via a pipeline or duct system or actively draws in room or device air at certain points, and then leads this representative subset to the named one Detector too.
- the intake pipes or ducts are provided with intake openings for drawing in the room or device air.
- Such a fire detection device is, of course, also required in a cold store or cold store if it is a matter of detecting a fire at the earliest stage of its occurrence with a high degree of reliability. An important prerequisite for this is that the fire detection device can continuously suck in a sufficient representative amount of air and supply it to the detector. This required continuity of air supply is in cold rooms and cold stores endangered by icing of the suction openings, and in other rooms or devices by pollution.
- an air intake system of a fire detection device with several intake pipes is known, through which room or device air is drawn in via intake openings.
- the suction openings are cleaned solely with compressed air.
- these are electrically heated as the air flow decreases, in order to prevent icing of the suction openings.
- the disadvantage of this air intake system is that electrical lines have to be laid in the intake pipes or at least thereon in order to feed the heating resistors. The electrical lines have the disadvantage that they are difficult to maintain, can easily lead to an "infarction" of the tubes when dust pipes are installed in the intake pipes, and finally in sensitive electronic systems due to the relative high heating currents and the associated electrical and electromagnetic fields.
- the elastic or flexible element can be used to implement a mechanical deicing device for the intake openings in an intake duct of a fire detection system that is easy to implement.
- the elastic element is fastened on the suction channel in such a way that it covers the suction opening, which is provided in the form of a bore in the suction channel, in such a way that the through-hole Opening is arranged coaxially to this suction opening and thus the diameter of the suction opening is reduced to the diameter of the through opening in the elastic element.
- a compressed air blast is sent through the suction channel by means of a corresponding compressed air device, whereupon the elastic element reversibly expands and deforms and the ice deposit blows off.
- the flexible element is also fastened on the suction channel in such a way that it covers the suction opening except for a remaining through-opening, which for example can also have the shape of an annular gap. If an ice edge attaches itself to the suction opening, the compressed air blast again takes place through the suction channel, whereupon the flexible element lifts off the suction opening and, when springing back, exerts a mechanical impact on the edge of the suction opening and thereby releases the ice deposit. It can initially be left open in which way the flexible element exerts the mechanical impact on the suction opening or its edge. It is only essential that any mechanical build-up on the edge of the suction opening can be eliminated by mechanical action of a flexible impact element.
- the method according to the invention specifies an advantageous method, by means of a blast of compressed air, to stretch a de-icing element of some kind through the intake duct or to lift it off the intake opening, which then suddenly expands or springs back under the effect of a restoring force when the blast of compressed air subsides, and thereby loosens the ice deposit at the suction opening.
- it can initially remain completely open as to how the deicing element is designed in detail. It can be, for example, a membrane made of rubber or rubber-like material in the manner of the elastic element described above, or a resilient tongue in the manner of the flexible element described above.
- the necessity of triggering the compressed air blast is Sensor determined, which is set to a certain target bandwidth of the mass flow of the intake air. If the clear cross section of the intake opening is reduced by icing, the air flow decreases and the air flow sensor detects a system error as soon as the air mass flow rate falls below the threshold value.
- the elastic element is part of the intake duct itself.
- the elastic element is part of a flexible sleeve, which at least partially clamps around the intake duct
- the elastic element consists of an elastic sleeve made of rubber or rubber-like material, which encloses the suction channel.
- the de-icing device can be retrofitted without any problems if the cuff is subsequently applied to the intake duct.
- the elastic element according to the second alternative is fastened to the intake duct by a clamping connection
- it is preferably provided for fastening the elastic sleeve according to the third alternative that it has a hole at one end and a nipple at the opposite end, and that the nipple is for Attach the elastic cuff through the hole and can be locked there.
- the elastic sleeve has the elongated shape of a tab and can be stretched in the longitudinal direction due to the elastic material when the nipple is pushed through the hole.
- the suction opening after the elastic or flexible sleeve has been put on is basically formed from the through opening in the elastic element. Since the intake openings in an intake duct system can have different diameters depending on the requirements, it is provided that elastic elements with through-openings of different sizes are provided. It is thus possible to use suction ducts in the form of tubes by the meter with standardized suction bores, the adaptation to the desired diameter of the suction openings then being carried out by the defrosting sleeve.
- the different deicing sleeves can in turn be manufactured inexpensively, since a single injection mold can be used with different inserts.
- Fig. La - lc each a perspective view of a
- FIG. 2 shows a top view of the elastic deicing cuff according to FIGS. 1b and 1c;
- Fig. 3 shows a vertical section through the elastic
- FIGS. 4a-4c the type of fastening of the elastic defrosting cuff to an intake duct section; 5 shows a cross section through an intake duct section with a clamped deicing collar; 6 again shows a perspective illustration of an intake duct section with a flexible defrosting collar attached and a flexible defrosting element; 7 shows a longitudinal section through the intake duct section according to FIG. 6; and
- FIG. 8 shows a cross section through the intake duct section along the line A-A of FIG. 7.
- Fig. La shows a perspective view of a
- Section of an intake duct 1 in the form of a cylindrical tube This pipe section is part of a pipeline or duct system with which a representative part of the cooling air of a device to be monitored or the room air of a room to be monitored is drawn in and fed to a detector. To draw in the room or device air, the suction pipes or ducts are provided with suction openings 2, only one of which is shown here.
- Fig. Ib shows the same perspective view of the
- Fig. Lc shows the back of the pipe section 1 of Fig. Ib and provides insight into the manner of attachment of the elastic deicing sleeve 5 on the pipe section 1, which will be explained in more detail below with reference to FIGS. 3 to 4c.
- FIG. 2 shows a top view of the elastic deicing collar 5, which has an elongated shape in the manner of a tab. It consists of rubber or rubber-like material, for example also from elastic plastic. In the middle is the penetration already mentioned with reference to FIG. passage opening 3 is provided, which is aligned coaxially with the suction opening 2 when the elastic sleeve 5 is seated correctly. At one end 6, the defrosting collar 5 has an elongated hole 7 and at the opposite end 9 a nipple 10, which, however, can be seen better in FIG. 3.
- FIG. 3 shows a vertical section through the elastic deicing cuff 5 of FIG. 2 along the line A-A.
- This illustration shows the nipple 10 attached to the top of the defrosting collar 5, which is made of the same material as the defrosting collar 5.
- the passage opening 3 has a reinforced edge 11, which increases the load-bearing capacity and thus the durability of the de-icing collar 5.
- FIG. 4a to 4c show the manner in which the elastic defrosting collar 5 is fastened to the intake duct section 1.
- This initially only has the intake opening 2 in the form of a standard bore in the tube 1 (FIG. 4a).
- the elastic deicing cuff 5 it is placed around the intake duct section 1 in such a way that the through opening 3 of the cuff 5 engages with its reinforced edge 11 in the intake opening.
- the defrosting sleeve 5 is wrapped around the pipe section 1, the end 9 of the nipple 10 carrying the underside 12 resting directly on the outer surface of the pipe section 1, while the end 6 with the elongated hole 7 extends over the defrosting sleeve 5 the nipple 10 is pulled and hooked into it.
- the elastic de-cuff 5 on the back of the suction opening 2 can also be closed by a Velcro fastener or the like.
- FIG. 5 shows a cross section of an intake duct section 1 with an intake opening 2 which is covered by another embodiment of a sleeve.
- the elastic element 4 which contains the passage opening 3 and the Suction opening 2 covers, and thus practically reduced to the passage opening 3, part of a flexible sleeve 8 which grips around the suction duct section 1 almost completely.
- the elastic element 4 also consists of elastic material, so that it can react in the desired manner to a blast of compressed air.
- FIG. 6 again shows a perspective illustration of a section of an intake duct 1 corresponding to FIGS. 1 a to 1 c.
- the cuff 8 is also made of flexible material, as in the embodiment according to FIG. 5.
- a flexible element 13 is provided here, which is designed in the manner of a leaf spring and with a fixed one End 15 is attached to the sleeve 8, while the free end 14 is arranged swingably above the suction opening 2.
- a stopper 18 is provided.
- the sleeve 8, which is made of flexible material clamps around the intake pipe 1 and is formed in one piece with the flexible element 13 and the stopper 18.
- a through opening 3 is again provided in the flexible element 13, through which the room or device air is sucked in exclusively or additionally.
- FIG. 7 shows a longitudinal section through the intake duct section 1 according to FIG. 6.
- the free-swinging end 14 of the flexible element 13 has a firing pin 17 which is formed in one piece with the flexible element 13 and tapers in the shape of a truncated cone towards the suction opening 2.
- the position of the firing pin in the suction opening 2 corresponds to the normal operation of the fire alarm system, during which air is continuously sucked in through the suction opening 2 or through the through opening 3 of the firing pin 17 and fed to a detector (not shown).
- the firing pin 17 partially engages in the suction opening 2 and lies with its conical outer surface 16 on the edge 11 of the suction opening 2.
- the flexible element 13 with the firing pin 17 is arranged in such a way that in the operating state an annular gap remains between the conical surface 16 of the firing pin 17 and the edge 11 of the suction opening 2, through which space, likewise or exclusively, remains - or device air is sucked in.
- FIG. 8 shows a cross section along the line AA of FIG. 7. It is clear from this illustration that the flexible cuff 8 does not completely surround the intake duct section 1, but only partially, so that the cuff 8 easily transversely to the longitudinal direction of the intake duct section 1 can be placed thereon. The intake duct section 1 and the sleeve 8 thus form a clamp connection.
- deicing element is also conceivable. Its design is essentially determined by the reliability in function and the simplicity of assembly and not least by the manufacturing price. It is essential that the deicing element is designed in such a way that it generates a reaction to the compressed air blast, through which the ice deposit at the suction opening is then released.
Landscapes
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Fire-Detection Mechanisms (AREA)
- Water Treatment By Sorption (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Confectionery (AREA)
- Catching Or Destruction (AREA)
- Defrosting Systems (AREA)
- Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
- Treatment Of Fiber Materials (AREA)
- Processing Of Meat And Fish (AREA)
- Fire Alarms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19605842A DE19605842C1 (de) | 1996-02-16 | 1996-02-16 | Vorrichtung und Verfahren zum Enteisen einer Ansaugöffnung |
DE19605842 | 1996-02-16 | ||
PCT/EP1997/000683 WO1997030428A1 (de) | 1996-02-16 | 1997-02-13 | Vorrichtung und verfahren zum enteisen einer ansaugöffnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0880767A1 true EP0880767A1 (de) | 1998-12-02 |
EP0880767B1 EP0880767B1 (de) | 2000-01-12 |
Family
ID=7785628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97904439A Expired - Lifetime EP0880767B1 (de) | 1996-02-16 | 1997-02-13 | Vorrichtung und verfahren zum enteisen einer ansaugöffnung |
Country Status (13)
Country | Link |
---|---|
US (1) | US6143090A (de) |
EP (1) | EP0880767B1 (de) |
AT (1) | ATE188797T1 (de) |
CZ (1) | CZ290139B6 (de) |
DE (2) | DE19605842C1 (de) |
ES (1) | ES2142663T3 (de) |
GR (1) | GR3033076T3 (de) |
HU (1) | HU220910B1 (de) |
NO (1) | NO329265B1 (de) |
PL (1) | PL183402B1 (de) |
PT (1) | PT880767E (de) |
SK (1) | SK284906B6 (de) |
WO (1) | WO1997030428A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10035809B4 (de) * | 2000-07-22 | 2010-05-12 | Mann + Hummel Gmbh | Vorrichtung zur Enteisung eines Durchflussquerschnitts |
DE10358531A1 (de) * | 2003-12-13 | 2005-07-28 | Minimax Gmbh & Co. Kg | Vorrichtung und Verfahren zum Detektieren von Entstehungsbränden |
US8973211B2 (en) | 2012-02-04 | 2015-03-10 | Hsi Fire & Safety Group, Llc | Detector cleaner and/or tester and method of using same |
DE102012013474A1 (de) * | 2012-07-09 | 2014-01-09 | Fresenius Medical Care Deutschland Gmbh | Vorrichtung zur Erkennung von Feuchtigkeit für eine Vorrichtung zur Überwachung eines Zugangs zu einem Patienten |
CN105074788B (zh) * | 2013-02-19 | 2019-08-16 | 爱克斯崔里斯科技有限公司 | 抽样点 |
US10463980B2 (en) * | 2016-02-17 | 2019-11-05 | Kyneprox S.R.L. | Multi-dynamic platform |
US10942021B2 (en) * | 2018-06-05 | 2021-03-09 | Honeywell International Inc. | Systems and methods for identifying a diameter of a sampling point |
US11543057B2 (en) | 2019-07-09 | 2023-01-03 | Honeywell International Inc. | Universal pipe sleeve junction for an aspirated smoke detection system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH521649A (de) * | 1970-07-31 | 1972-04-15 | Cerberus Ag | Feuermeldeeinrichtung |
DE3348107C2 (en) * | 1983-08-30 | 1988-01-21 | Securiton Ag, Zollikofen, Bern, Ch | Smoke suction system of a line smoke alarm |
US5035380A (en) * | 1990-01-09 | 1991-07-30 | The B. F. Goodrich Company | De-icer |
US5314145A (en) * | 1992-12-30 | 1994-05-24 | The B.F. Goodrich Company | Compressible nose dynamic de-icer |
US5562265A (en) * | 1994-10-13 | 1996-10-08 | The B. F. Goodrich Company | Vibrating pneumatic deicing system |
-
1996
- 1996-02-16 DE DE19605842A patent/DE19605842C1/de not_active Expired - Fee Related
-
1997
- 1997-02-13 DE DE59701001T patent/DE59701001D1/de not_active Expired - Lifetime
- 1997-02-13 ES ES97904439T patent/ES2142663T3/es not_active Expired - Lifetime
- 1997-02-13 US US09/125,238 patent/US6143090A/en not_active Expired - Lifetime
- 1997-02-13 CZ CZ19982577A patent/CZ290139B6/cs not_active IP Right Cessation
- 1997-02-13 AT AT97904439T patent/ATE188797T1/de active
- 1997-02-13 SK SK1099-98A patent/SK284906B6/sk not_active IP Right Cessation
- 1997-02-13 EP EP97904439A patent/EP0880767B1/de not_active Expired - Lifetime
- 1997-02-13 PL PL97328346A patent/PL183402B1/pl not_active IP Right Cessation
- 1997-02-13 WO PCT/EP1997/000683 patent/WO1997030428A1/de active IP Right Grant
- 1997-02-13 PT PT97904439T patent/PT880767E/pt unknown
- 1997-02-13 HU HU9901015A patent/HU220910B1/hu not_active IP Right Cessation
-
1998
- 1998-08-14 NO NO19983734A patent/NO329265B1/no not_active IP Right Cessation
-
2000
- 2000-03-28 GR GR20000400765T patent/GR3033076T3/el unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9730428A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1997030428A1 (de) | 1997-08-21 |
NO983734D0 (no) | 1998-08-14 |
CZ290139B6 (cs) | 2002-06-12 |
DE19605842C1 (de) | 1997-04-24 |
PL328346A1 (en) | 1999-01-18 |
ES2142663T3 (es) | 2000-04-16 |
CZ257798A3 (cs) | 1999-01-13 |
HUP9901015A3 (en) | 1999-11-29 |
PL183402B1 (pl) | 2002-06-28 |
NO983734L (no) | 1998-08-14 |
SK284906B6 (sk) | 2006-02-02 |
ATE188797T1 (de) | 2000-01-15 |
SK109998A3 (en) | 1999-08-06 |
HU220910B1 (en) | 2002-06-29 |
GR3033076T3 (en) | 2000-08-31 |
EP0880767B1 (de) | 2000-01-12 |
DE59701001D1 (de) | 2000-02-17 |
PT880767E (pt) | 2000-04-28 |
HUP9901015A2 (hu) | 1999-07-28 |
NO329265B1 (no) | 2010-09-20 |
US6143090A (en) | 2000-11-07 |
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