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EP1911497A1 - A water mist nozzle and a method of guiding air in a water mist nozzle - Google Patents

A water mist nozzle and a method of guiding air in a water mist nozzle Download PDF

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Publication number
EP1911497A1
EP1911497A1 EP07388074A EP07388074A EP1911497A1 EP 1911497 A1 EP1911497 A1 EP 1911497A1 EP 07388074 A EP07388074 A EP 07388074A EP 07388074 A EP07388074 A EP 07388074A EP 1911497 A1 EP1911497 A1 EP 1911497A1
Authority
EP
European Patent Office
Prior art keywords
release element
heat release
water mist
mist nozzle
fins
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
Application number
EP07388074A
Other languages
German (de)
French (fr)
Other versions
EP1911497B1 (en
Inventor
Carsten Palle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VID FIRE-KILL APS
Original Assignee
VID ApS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by VID ApS filed Critical VID ApS
Priority to PL07388074T priority Critical patent/PL1911497T3/en
Publication of EP1911497A1 publication Critical patent/EP1911497A1/en
Application granted granted Critical
Publication of EP1911497B1 publication Critical patent/EP1911497B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
    • A62C37/10—Releasing means, e.g. electrically released
    • A62C37/11—Releasing means, e.g. electrically released heat-sensitive

Definitions

  • the invention concerns a water mist nozzle and method for guiding air in a water mist nozzle for the improvement of time response time index on automatic fire sprinklers classified as Fast Response Sprinkler Heads in accordance with ISO standards for automatic fire sprinklers, and US standards NFPA 13 and NFPA 13R, NFPA 13D, EN 12845, EN-12259-1, Factory Mutual Class No. 5560 and similar installation and approval standards for land based sprinklers and water mist sprinklers for fire protection, as well as the International Maritime Organisation's Resolution A800 etc.
  • the sprinkler heads For an automatic sprinkler head to be recognized and approved to have Fast Response Characteristics in accordance with the mentioned standards, the sprinkler heads must pass a series of standardized time response tests in a standardized test tunnel at various air flow velocities with various air temperatures and with the sprinkler heads installed in various positions to the air flows.
  • a problem with this type of concealed sprinkler heads is that it is necessary to provide a flow of hot air flowing through the gap between the cover plate and out through the vent holes in the cup to be able to obtain fast response characteristics for the sprinkler heads and, furthermore, that insulating material and dust very often block the vent holes and the air gap and thereby prevent the sprinkler heads from having true fast response characteristics when installed in ceilings.
  • Sprinklers and water mist heads for installation in corrosive environments such as saltine atmospheres and atmospheres containing ammonia etc. are often made of brass and later coated with wax. Another method is to manufacture the heads in stainless steel or other metals, which are little affected by the corrosive atmosphere.
  • Sprinkler and water mist heads for installation in locations with vapours and splash, such as for example above fat fryers, which my cause clogging in the sprinkler head, are often designed as open nozzles which are protected with a cap, and with temperature release from a detector external to the sprinkler or water mist nozzle.
  • the object of the invention is to overcome the mentioned problems in relation to automatic concealed sprinkler and water mist heads by decreasing the response time of automatic sprinkler heads and water mist nozzles having a heat release element being a glass bulb, a solder link, or a shape memory alloy in a horizontal position when being tested in an air tunnel, and hereby the invention makes it possible for concealed sprinkler and water mist nozzles to obtain classification, as having Fast Response Characteristics.
  • the invention may also comprise a screen between the ambient and the sprinkler nozzle interiors to provide the sprinkler heads with an architecturally closed design, and to protect the sprinkler head interiors from vapours and impurities in the ambient which may cause corrosion or clogging and thus malfunction of the sprinkler head.
  • the invention is characterized in comprising one or more fins positioned on an automatic sprinkler or water mist nozzle, where each fin is positioned with its length line 90° ⁇ 45° to the length line of the heat release element of the sprinkler head or water mist nozzle having a horizontally positioned heat release element or a heat release element positioned ⁇ 45° to the horizontal level, and where the distance between the fin and the heat release element is 0 - 5 mm.
  • the fin guides the air flow to the close surrounding of the heat release element, which causes a faster heating of the heat response element causing a fast release of the automatic sprinkler or water mist nozzle.
  • the fin or fins are arranged on a plate or thin foil, which is located on the outlet flange of a sprinkler or water mist nozzle, and each fin is positioned with its length line 90° ⁇ 45° to the length line of the heat release element of a sprinkler head or water mist nozzle having a horizontally positioned heat release element or a heat release element positioned ⁇ 45° to the horizontal level, and where the distance between the fin and the heat release element is 0-5 mm, the plate or thin foil will serve as a shielding of the sprinkler or water mist nozzle interior, protecting the interior from the surrounding environment, and when the sprinkler or water mist head is time response tested in an air tunnel, the plate guides the air flow to the close surrounding of the heat release element, which causes a faster heating of the heat response element causing a fast release of the automatic sprinkler or water mist nozzle.
  • the heat release element is a glass bulb, a solder link, or a shape memory alloy the element will be sensitive to heat.
  • the fin or fins are positioned on the cover plate of an automatic sprinkler or water mist nozzle, where each fin is positioned with its length line 90° ⁇ 45° to the length line of the heat release element of a sprinkler head or water mist nozzle having a horizontally positioned heat release element or a heat release element positioned ⁇ 45° to the horizontal level, and where the distance between the fin and the heat release element is 0-5 mm, the fin guides the air flow to the close surrounding of the heat release element, which causes a faster heating of the heat response element causing a fast release of the automatic sprinkler or water mist nozzle.
  • the fin guides the air flow to the close surrounding of the heat release element, which causes a faster heating of the heat response element causing a fast release of the automatic sprinkler or water mist nozzle.
  • FIG. 1A shows an example of the invention where a fin 6 is positioned on an automatic nozzle head in the shape of a sprinkler or a water mist head 2.
  • the fin 6 is placed above a horizontally positioned heat release element 4, which is fixed between a first holder 3 and a second holder 5 and concealed by a cover plate 8.
  • the heat release element may be a glass bulb 4 or a similar device that is sensitive to heat.
  • the nozzle head When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the longitudinal axis of the heat element 4 is positioned at an angle of ⁇ 20° with respect to the direction of the heated air flow 1.
  • the first holder 3 shades the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • the air flow 1 hits the fin 6 outside the shade area of the first holder 3, and the fin 6 directs some of the hot air to flow along the fin and around the surface of the heat release element 4 as indicated by the arrow 7.
  • the heat release element 4 is thereby heated more quickly, causing the nozzle to show a faster time response.
  • FIG 2 shows another embodiment of the invention showed in figure 1A.
  • the fin 6 is a part of a plate or thin foil 9 that covers the outlet 10 of the water nozzle and thereby protects the interior of the automatic nozzle head in the shape of a sprinkler or a water mist nozzle.
  • the nozzle When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the first holder 3 shields the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • the air flow 1 hits the fin 6 outside the area shielded by the holder 3, and the fin 6 directs some of the hot air stream 7 to flow along the fin and the plate surface to surround the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.
  • Figure 3 shows an example of the invention where a fin 6 is formed to surround the heat release element 4.
  • the air flow 1 hits the fin 6 outside the area shielded by the holder 3, and the fin 6 directs some of the hot air stream 7 to flow along the fin 6 and around the surface of the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.
  • Figure 4 shows a further embodimenet of the invention where a fin 6 is positioned on a cover plate 8, which is positioned below the heat release element 4 of an automatic sprinkler or water mist nozzle.
  • the nozzle When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the first holder 3 shields the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • the air flow 1 hits the fin 6 outside the area shielded by the holder 3, and the fin 6 directs some of the hot air stream 7 to flow along the fin 6 and around the surface of the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.
  • Figure 5 shows an example of the invention where two fins 6a, 6b are positioned in a vertical position at the sides of the vertically positioned heat release element 4 of a sprinkler or water mist nozzle having two yoke arms 3,5, and a deflector 8, and with the fins 6a,6b positioned perpendicularly to the nozzle yoke.
  • the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the one holder 3 shielding the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • the air flow 1 hits the fins 6 outside the area shielded by the holder 3, and the fins 6 direct some of the hot air stream 7 to flow along the fins and around the surface of the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.
  • Figure 6 shows yet another embodiment of the invention where three or more fins 6 are positioned in a vertical position at the side of a hollow cup 11 with holes or slots in which the heat release element 4 of an automatic spray or water mist nozzle is positioned.
  • the nozzle When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the cup material 11 shields the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • the air flow 1 hits the fins 6 and the fins direct the hot air through the slots or holes in to the hollow space of the cup 11 and around the surface of the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Abstract

A water mist nozzle for fire extinguishing and method for guiding a stream of hot air in a water mist nozzle, where the water mist nozzle comprises a water head (2) for releasing water, a heat release element (4) which is heat sensitive, one ore more holders (3,5) for holding the heat release element (4), and one or more fins (6) positioned on the nozzle (2) with an angle of 90° ± 45° between the longitudinal axis of each fin (6) and the longitudinal axis of the heat release element (4) and a distance of 0-5 mm between a fin (6) and the heat release element (4) so that the fins (6) direct air flow (1) to the heat release element (4).

Description

    The prior art
  • The invention concerns a water mist nozzle and method for guiding air in a water mist nozzle for the improvement of time response time index on automatic fire sprinklers classified as Fast Response Sprinkler Heads in accordance with ISO standards for automatic fire sprinklers, and US standards NFPA 13 and NFPA 13R, NFPA 13D, EN 12845, EN-12259-1, Factory Mutual Class No. 5560 and similar installation and approval standards for land based sprinklers and water mist sprinklers for fire protection, as well as the International Maritime Organisation's Resolution A800 etc. for automatic fire sprinklers, and water mist sprinklers for maritime fire protection, as well as for sprinkler and water mist heads for installation in corrosive environments, and environments with vapours, splash and sprays which may cause risks of clogging and similar malfunctions on sprinkler and water mist nozzle heads.
  • For an automatic sprinkler head to be recognized and approved to have Fast Response Characteristics in accordance with the mentioned standards, the sprinkler heads must pass a series of standardized time response tests in a standardized test tunnel at various air flow velocities with various air temperatures and with the sprinkler heads installed in various positions to the air flows.
  • Automatic sprinkler heads with Fast Response characteristics are known from traditional sprinkler heads as in CA2289974 by Oliver applying a vertically positioned heat release element in the shape of a glass bulb with a diameter of 3 mm or smaller, or a fast response solder link, which is vertically positioned between two open yoke arms, which when installed in ceilings are positioned below or partly below the ceiling surface.
  • A problem with these designs is that the sprinkler heads are fully visible in the ceilings.
  • An attempt to solve this problem is made in concealed style sprinkler heads as in US4977963 by Simons . In this type of automatic sprinkler heads an automatic yoke style applying a vertically positioned glass bulb with a diameter of 3 mm or less, or a quick response solder link, and a water deflector positioned on two drop pins, are installed in a cup with the large opening facing downwards, and with vent holes at the top of the cup. A cover plate is soldered on to the cup opening with a solder having a low melting point, typically 50°C to 60°C, in a way that leaves an air gap of approximately 1-5 mm between the cup flange and the surface of the cover plate.
  • A problem with this type of concealed sprinkler heads is that it is necessary to provide a flow of hot air flowing through the gap between the cover plate and out through the vent holes in the cup to be able to obtain fast response characteristics for the sprinkler heads and, furthermore, that insulating material and dust very often block the vent holes and the air gap and thereby prevent the sprinkler heads from having true fast response characteristics when installed in ceilings.
  • An attempt to solve these problems is made in the flush style sprinkler heads as in US4757865 by Simons . Here a heat collector arrangement is attached to the release element, or a heat collector arrangement is built into the release element. The collector arrangement collects the heat of a fire and transfers the heat through its material directly to the release element.
  • The problems with the arrangements are that the sprinkler heads consist of many parts, and that the sprinkler heads become complicated to manufacture.
  • Sprinklers and water mist heads for installation in corrosive environments such as saltine atmospheres and atmospheres containing ammonia etc. are often made of brass and later coated with wax. Another method is to manufacture the heads in stainless steel or other metals, which are little affected by the corrosive atmosphere.
  • Problems with the mentioned methods are that wax coating affects the architectural design of the sprinkler heads, and it complicates storage and installation of the sprinkler heads. Corrosion-resistant metals cause a significant cost increase in the manufacturing of most sprinkler heads.
  • Sprinkler and water mist heads for installation in locations with vapours and splash, such as for example above fat fryers, which my cause clogging in the sprinkler head, are often designed as open nozzles which are protected with a cap, and with temperature release from a detector external to the sprinkler or water mist nozzle.
  • The problem with this design is that the protection tends to fall off and, furthermore, that the external release mechanism causes an extra and more complicated installation and control of the sprinkler and water mist heads.
    • The object of the invention
  • The object of the invention is to overcome the mentioned problems in relation to automatic concealed sprinkler and water mist heads by decreasing the response time of automatic sprinkler heads and water mist nozzles having a heat release element being a glass bulb, a solder link, or a shape memory alloy in a horizontal position when being tested in an air tunnel, and hereby the invention makes it possible for concealed sprinkler and water mist nozzles to obtain classification, as having Fast Response Characteristics.
  • Furthermore, the invention may also comprise a screen between the ambient and the sprinkler nozzle interiors to provide the sprinkler heads with an architecturally closed design, and to protect the sprinkler head interiors from vapours and impurities in the ambient which may cause corrosion or clogging and thus malfunction of the sprinkler head.
  • The invention is characterized in comprising one or more fins positioned on an automatic sprinkler or water mist nozzle, where each fin is positioned with its length line 90° ± 45° to the length line of the heat release element of the sprinkler head or water mist nozzle having a horizontally positioned heat release element or a heat release element positioned ±45° to the horizontal level, and where the distance between the fin and the heat release element is 0 - 5 mm.
  • When the sprinkler or water mist head is time response tested in an air tunnel, the fin guides the air flow to the close surrounding of the heat release element, which causes a faster heating of the heat response element causing a fast release of the automatic sprinkler or water mist nozzle.
  • When, as stated in claim 2, the fin or fins are arranged on a plate or thin foil, which is located on the outlet flange of a sprinkler or water mist nozzle, and each fin is positioned with its length line 90° ± 45° to the length line of the heat release element of a sprinkler head or water mist nozzle having a horizontally positioned heat release element or a heat release element positioned ±45° to the horizontal level, and where the distance between the fin and the heat release element is 0-5 mm, the plate or thin foil will serve as a shielding of the sprinkler or water mist nozzle interior, protecting the interior from the surrounding environment, and when the sprinkler or water mist head is time response tested in an air tunnel, the plate guides the air flow to the close surrounding of the heat release element, which causes a faster heating of the heat response element causing a fast release of the automatic sprinkler or water mist nozzle.
  • When, as stated in claim 3, the heat release element is a glass bulb, a solder link, or a shape memory alloy the element will be sensitive to heat.
  • When, as stated in claim 4, the fin or fins are positioned on the cover plate of an automatic sprinkler or water mist nozzle, where each fin is positioned with its length line 90° ± 45° to the length line of the heat release element of a sprinkler head or water mist nozzle having a horizontally positioned heat release element or a heat release element positioned ±45° to the horizontal level, and where the distance between the fin and the heat release element is 0-5 mm, the fin guides the air flow to the close surrounding of the heat release element, which causes a faster heating of the heat response element causing a fast release of the automatic sprinkler or water mist nozzle.
  • It is expedient to position the one or more thin fins in a vertical position along a vertically positioned heat release element with a distance of 0-5 mm from the fin to the surface of the release element of an automatic sprinkler or an automatic water mist nozzle as stated in claim 5.
  • Finally, as stated in claim 6, it is advantageous if the fins are wider than the yoke arms or cup with holes holding the heat release element in place.
  • Thereby, when the sprinkler or water mist head is time response tested in an air tunnel, the fin guides the air flow to the close surrounding of the heat release element, which causes a faster heating of the heat response element causing a fast release of the automatic sprinkler or water mist nozzle.
    • The drawing
  • The invention will be described more fully below with references to the drawing, in which
    • Fig. 1A
    shows an example of the invention with a fin positioned on an automatic sprinkler or water mist head above a horizontally positioned heat release element being a glass bulb,
    Fig. 1B
    shows the same as figure 1A, but from a different angle,
    Fig. 2
    shows an example of the invention where a fin is formed in a plate or foil, which provides a screen at the entrance to the nozzle interior, and where the fin is positioned above a horizontally positioned release element being a glass bulb,
    Fig. 3
    shows an example of the invention where a fin is formed to cover around the heat release element of an automatic sprinkler or water mist nozzle, which is concealed by a plate,
    Fig. 4
    shows an example of the invention where a fin is positioned on the cover plate of an automatic sprinkler or water mist nozzle having a horizontally positioned heat release element in the shape of a glass bulb,
    Fig. 5
    shows an example of the invention where two fins are positioned on an automatic sprinkler or water mist head with a vertically installed heat release element in the shape of a glass bulb positioned in a yoke having two arms, and
    Fig. 6
    shows an example of the invention where four fins are positioned on a water mist nozzle having a vertically positioned release element positioned in a yoke having multiple legs.
    Description of exemplary embodiments
  • Figure 1A shows an example of the invention where a fin 6 is positioned on an automatic nozzle head in the shape of a sprinkler or a water mist head 2. The fin 6 is placed above a horizontally positioned heat release element 4, which is fixed between a first holder 3 and a second holder 5 and concealed by a cover plate 8. The heat release element may be a glass bulb 4 or a similar device that is sensitive to heat.
  • When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the longitudinal axis of the heat element 4 is positioned at an angle of ±20° with respect to the direction of the heated air flow 1.
  • In this position the first holder 3 shades the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response. According to the invention the air flow 1 hits the fin 6 outside the shade area of the first holder 3, and the fin 6 directs some of the hot air to flow along the fin and around the surface of the heat release element 4 as indicated by the arrow 7. The heat release element 4 is thereby heated more quickly, causing the nozzle to show a faster time response.
  • Figure 2 shows another embodiment of the invention showed in figure 1A. Here the fin 6 is a part of a plate or thin foil 9 that covers the outlet 10 of the water nozzle and thereby protects the interior of the automatic nozzle head in the shape of a sprinkler or a water mist nozzle.
  • When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the first holder 3 shields the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • With the invention the air flow 1 hits the fin 6 outside the area shielded by the holder 3, and the fin 6 directs some of the hot air stream 7 to flow along the fin and the plate surface to surround the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.
  • Figure 3 shows an example of the invention where a fin 6 is formed to surround the heat release element 4. When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the first holder 3 shields the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • With the invention the air flow 1 hits the fin 6 outside the area shielded by the holder 3, and the fin 6 directs some of the hot air stream 7 to flow along the fin 6 and around the surface of the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.
  • Figure 4 shows a further embodimenet of the invention where a fin 6 is positioned on a cover plate 8, which is positioned below the heat release element 4 of an automatic sprinkler or water mist nozzle.
  • When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the first holder 3 shields the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • With the invention the air flow 1 hits the fin 6 outside the area shielded by the holder 3, and the fin 6 directs some of the hot air stream 7 to flow along the fin 6 and around the surface of the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.
  • Figure 5 shows an example of the invention where two fins 6a, 6b are positioned in a vertical position at the sides of the vertically positioned heat release element 4 of a sprinkler or water mist nozzle having two yoke arms 3,5, and a deflector 8, and with the fins 6a,6b positioned perpendicularly to the nozzle yoke. When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the one holder 3 shielding the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • With the invention the air flow 1 hits the fins 6 outside the area shielded by the holder 3, and the fins 6 direct some of the hot air stream 7 to flow along the fins and around the surface of the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.
  • Figure 6 shows yet another embodiment of the invention where three or more fins 6 are positioned in a vertical position at the side of a hollow cup 11 with holes or slots in which the heat release element 4 of an automatic spray or water mist nozzle is positioned.
  • When the nozzle head is time response tested in an air tunnel, the nozzle is installed in a disadvantageous position where the cup material 11 shields the heated air flow 1 from heating the heat release element 4 with a direct stream of hot air, causing the heat release element of the nozzle to have a delayed time response.
  • With the invention the air flow 1 hits the fins 6 and the fins direct the hot air through the slots or holes in to the hollow space of the cup 11 and around the surface of the heat release element 4, which is thereby heated more quickly by the heated air flow, causing the nozzle to show a faster time response.

Claims (7)

  1. A water mist nozzle for fire extinguishing comprising
    - a water head for releasing water,
    - a heat release element which is heat sensitive and
    - one ore more holders for holding the heat release element (4),
    characterized in that one or more fins (6) are positioned on the nozzle (2) with an angle of 90° ± 45° between the longitudinal axis of each fin (6) and the longitudinal axis of the heat release element (4) and a distance of 0-5 mm between a fin (6) and the heat release element (4) so that the fins (6) directs air flow (1) to the heat release element (4).
  2. A water mist nozzle according to claim 1, characterized in that one or more fins (6) are arranged on a plate or thin foil (9) which is located on a flange leading into to the interior of the water mist nozzle (2).
  3. A water mist nozzle according to claim 1, characterized in that the heat release element (4) is a glass bulb, a solder link, or a shape memory alloy.
  4. A water mist nozzle according to claim 1, characterized in that one or more fins (6) are positioned on the cover plate (8) of the water mist nozzle (2), and that each fin (6) is positioned with its length line 90° ± 45° to the length line of the heat release element (4) having a horizontally or aslant positioned heat release element (4), and that the distance between the fins (6) and the heat release element (4) is 0-5 mm.
  5. A water mist nozzle according to claim 1, characterized in that one or more fins (6) are positioned in a vertical position along a vertically positioned heat release element (4) with a distance of 0-5 mm from the fin (6) to the surface of the heat release element (4) of the water mist nozzle (2).
  6. A water mist nozzle according to claim 5, characterized in that the vertically positioned heat release element (4) is held in place by a hollow cup (11) with holes for holding the heat release element (4), and that the fins (6) are wider than the width of the cup (11) so that the air (1) is directed around the cup (11) towards the heat release element (4) for a faster heating.
  7. A method for guiding a stream of hot air in a water mist nozzle comprising
    - a water head for releasing water,
    - a heat release element which is heat sensitive and
    - one ore more holders for holding the heat release element,
    characterized in that the air (1) is led onto the heat release element (4) by one or more fins (6) which are arranged in the vicinity of the heat release element.
EP07388074.2A 2006-10-13 2007-10-11 A water mist nozzle with air guiding Active EP1911497B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07388074T PL1911497T3 (en) 2006-10-13 2007-10-11 A water mist nozzle with air guiding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DKPA200601329 2006-10-13

Publications (2)

Publication Number Publication Date
EP1911497A1 true EP1911497A1 (en) 2008-04-16
EP1911497B1 EP1911497B1 (en) 2019-01-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07388074.2A Active EP1911497B1 (en) 2006-10-13 2007-10-11 A water mist nozzle with air guiding

Country Status (5)

Country Link
EP (1) EP1911497B1 (en)
DK (1) DK1911497T3 (en)
ES (1) ES2720063T3 (en)
HU (1) HUE044058T2 (en)
PL (1) PL1911497T3 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
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JP2012105952A (en) * 2010-10-21 2012-06-07 Nohmi Bosai Ltd Sprinkler head
CN102494930A (en) * 2011-12-10 2012-06-13 周辉 Electric heating airflow fuming device
EP2542311A2 (en) * 2010-03-04 2013-01-09 VID Fire-Kill ApS A modular automatic spray nozzle
JP2013208146A (en) * 2012-03-30 2013-10-10 Nohmi Bosai Ltd Sprinkler head
JP2015226839A (en) * 2015-08-11 2015-12-17 能美防災株式会社 Sprinkler head
WO2017158215A1 (en) * 2016-03-16 2017-09-21 Pyro Fire Extinction, S.L. Capsule for protecting against fires and method for creating a security zone
CN107261368A (en) * 2017-08-01 2017-10-20 中国人民武装警察部队学院 Cool down glass curtain nozzle specially used
CN110017980A (en) * 2019-05-21 2019-07-16 中国民用航空飞行学院 The test method of hangar heavy pressure fine spray mist characteristic

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Publication number Priority date Publication date Assignee Title
CN111569321A (en) * 2020-05-22 2020-08-25 江苏科技大学 Water curtain fire extinguishing nozzle for water mist of ship

Citations (6)

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US4757865A (en) 1986-11-19 1988-07-19 Star Sprinkler Corporation Fast response sprinkler head
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EP2542311A2 (en) * 2010-03-04 2013-01-09 VID Fire-Kill ApS A modular automatic spray nozzle
JP2012105952A (en) * 2010-10-21 2012-06-07 Nohmi Bosai Ltd Sprinkler head
CN102494930A (en) * 2011-12-10 2012-06-13 周辉 Electric heating airflow fuming device
CN102494930B (en) * 2011-12-10 2014-08-20 周辉 Electric heating airflow fuming device
JP2013208146A (en) * 2012-03-30 2013-10-10 Nohmi Bosai Ltd Sprinkler head
JP2015226839A (en) * 2015-08-11 2015-12-17 能美防災株式会社 Sprinkler head
WO2017158215A1 (en) * 2016-03-16 2017-09-21 Pyro Fire Extinction, S.L. Capsule for protecting against fires and method for creating a security zone
CN107261368A (en) * 2017-08-01 2017-10-20 中国人民武装警察部队学院 Cool down glass curtain nozzle specially used
CN110017980A (en) * 2019-05-21 2019-07-16 中国民用航空飞行学院 The test method of hangar heavy pressure fine spray mist characteristic
CN110017980B (en) * 2019-05-21 2020-12-01 中国民用航空飞行学院 Test method for characteristics of high pressure water mist in hangars

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EP1911497B1 (en) 2019-01-16
HUE044058T2 (en) 2019-09-30
DK1911497T3 (en) 2019-04-23
PL1911497T3 (en) 2019-07-31

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