CA2109558A1 - Stove-top and oven fire extinguisher - Google Patents
Stove-top and oven fire extinguisherInfo
- Publication number
- CA2109558A1 CA2109558A1 CA002109558A CA2109558A CA2109558A1 CA 2109558 A1 CA2109558 A1 CA 2109558A1 CA 002109558 A CA002109558 A CA 002109558A CA 2109558 A CA2109558 A CA 2109558A CA 2109558 A1 CA2109558 A1 CA 2109558A1
- Authority
- CA
- Canada
- Prior art keywords
- stove
- extinguishant
- nozzle
- carbon dioxide
- activator
- 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.)
- Abandoned
Links
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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/006—Fire prevention, containment or extinguishing specially adapted for particular objects or places for kitchens or stoves
Landscapes
- 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
ABSTRACT
A fire extinguisher system for attachment to a stove, having a stove-top including at least one heating element, comprising: a container for pressurized fire extinguishant; a conduit having a receiving end for receiving pressurized fire extinguishant from the container and a distributing end connected to at least one nozzle for distributing fire extinguishant adjacent a stove-top heating element; and an activator for releasing the extinguishant into the receiving end of the conduit. This invention avoids the problems associated with overhead systems which may cause hot burning liquids on the stove-top to splash onto nearby people or objects, which may cause injury or further fires.
A fire extinguisher system for attachment to a stove, having a stove-top including at least one heating element, comprising: a container for pressurized fire extinguishant; a conduit having a receiving end for receiving pressurized fire extinguishant from the container and a distributing end connected to at least one nozzle for distributing fire extinguishant adjacent a stove-top heating element; and an activator for releasing the extinguishant into the receiving end of the conduit. This invention avoids the problems associated with overhead systems which may cause hot burning liquids on the stove-top to splash onto nearby people or objects, which may cause injury or further fires.
Description
1239-~ 2~0~
ST~VE-TOP AND OVEN ~E EX~INGV~8~R
FIELD OF INVEN'rION
This invention relates to a built-in fire extinguisher for extinguishing stove-top and oven fires.
~CKGROUND OF THE INVENTION
.: ,; , ~ , Stove-top fires, which are often grease fires, are among the most common and dangerous types of fire. Typically, i-a frying pan or wok is left unattended, and the contents thereof, which often contain oil, will overheat and ignite. Often, a pot of flammable liquid, such as oil, boils over onto a stove element ~ -and ignites. Because stove elemen-ts provide a continuing sourcs ~ ~ ~
of heat, stove-top fires generally progress and spread quickly. ,-?
Cupboards above the stove often catch fire, and burning Iiquid often spill onto the floor in front of the stove.
A common precaution against stove-top fires is to equip a kitchen with a portable fire extinguisher and/or a fire blanket. The problem of unattended fires remains unsolved, however, and fire blankets, which are often installed between the ','''A',.
stove elements and the oven, may be rendered inaccessible by a serious fire.
In industrial kitchens, and in some residential -kitchens, automatically activated fire extinguishers are generally installed above a stove. Commonly referred to as deluge systems, they include a pressurized extinguishant, usually ~;~
a dry chemical extinguishant, which is directed down onto the stove-top through nozzIes mounted above the stove. Such systems are often activated by a heat sensor mounted above the stove, and generally include a mechanism for shutting off the heat source, ~ ~
that is, the electricity or gas. ~ ;
Several problems are associated with overhead systems. ~ ;
First, the downwardly directed extinguishant may cause hot or
ST~VE-TOP AND OVEN ~E EX~INGV~8~R
FIELD OF INVEN'rION
This invention relates to a built-in fire extinguisher for extinguishing stove-top and oven fires.
~CKGROUND OF THE INVENTION
.: ,; , ~ , Stove-top fires, which are often grease fires, are among the most common and dangerous types of fire. Typically, i-a frying pan or wok is left unattended, and the contents thereof, which often contain oil, will overheat and ignite. Often, a pot of flammable liquid, such as oil, boils over onto a stove element ~ -and ignites. Because stove elemen-ts provide a continuing sourcs ~ ~ ~
of heat, stove-top fires generally progress and spread quickly. ,-?
Cupboards above the stove often catch fire, and burning Iiquid often spill onto the floor in front of the stove.
A common precaution against stove-top fires is to equip a kitchen with a portable fire extinguisher and/or a fire blanket. The problem of unattended fires remains unsolved, however, and fire blankets, which are often installed between the ','''A',.
stove elements and the oven, may be rendered inaccessible by a serious fire.
In industrial kitchens, and in some residential -kitchens, automatically activated fire extinguishers are generally installed above a stove. Commonly referred to as deluge systems, they include a pressurized extinguishant, usually ~;~
a dry chemical extinguishant, which is directed down onto the stove-top through nozzIes mounted above the stove. Such systems are often activated by a heat sensor mounted above the stove, and generally include a mechanism for shutting off the heat source, ~ ~
that is, the electricity or gas. ~ ;
Several problems are associated with overhead systems. ~ ;
First, the downwardly directed extinguishant may cause hot or
- 2 - ;~
2:~0~
;~urning li4ulds on the stove-tc~p to spLash onto ne~rby pe~op:Le or objects, which may cause injury or further fires.
Second, the dry chemical extinguishant normally used has little cooling effect. Consequently, since the fire is extinguished primarily through smothering, large amounts of ; -extinguishant are required. Reignition is also possible if the ;~
fire extinguishing system does not include a device to shut off the heat source.
' ' ~ ''':
Third, since the extinguishant is directed from above, ~ -overhead systems are largely ineffective at transporting extinguishant to areas underneath large cooking utensils, even ~
though these somewhat inaccessible locations are often involved ~ ~-in a stove-top fire.
Fourth, the dry chemical extinguishant used with overhead systems necessitates extensive clean-up after activation. In particular, a fine chemical powder may permeate the house or other building, staying in rugs, drapes, furnace ducts, and the like for months or years.
."
Finally, overhead systems have little or no effect on oven fires. ;
. .
, S~MMARY OF T~E INVENTION
,, ' .:
.. ...
The object of the invention is to provide an improved ~ fire extinguisher ~or ovens and stoves.
::
According to the invention, there is provided a fire extinguisher system for attachment to a stove, having a stove-top including at least one heating element, comprising: a container for pressurized fire extinguishant; a conduit having a receiving end for receiving pressurized fire extinguishant from the container and a distributing end connected to at least one nozzle for distributing fire extinguishant adjacent a stove-top heating ... ~ .,; .
2:~0~
;~urning li4ulds on the stove-tc~p to spLash onto ne~rby pe~op:Le or objects, which may cause injury or further fires.
Second, the dry chemical extinguishant normally used has little cooling effect. Consequently, since the fire is extinguished primarily through smothering, large amounts of ; -extinguishant are required. Reignition is also possible if the ;~
fire extinguishing system does not include a device to shut off the heat source.
' ' ~ ''':
Third, since the extinguishant is directed from above, ~ -overhead systems are largely ineffective at transporting extinguishant to areas underneath large cooking utensils, even ~
though these somewhat inaccessible locations are often involved ~ ~-in a stove-top fire.
Fourth, the dry chemical extinguishant used with overhead systems necessitates extensive clean-up after activation. In particular, a fine chemical powder may permeate the house or other building, staying in rugs, drapes, furnace ducts, and the like for months or years.
."
Finally, overhead systems have little or no effect on oven fires. ;
. .
, S~MMARY OF T~E INVENTION
,, ' .:
.. ...
The object of the invention is to provide an improved ~ fire extinguisher ~or ovens and stoves.
::
According to the invention, there is provided a fire extinguisher system for attachment to a stove, having a stove-top including at least one heating element, comprising: a container for pressurized fire extinguishant; a conduit having a receiving end for receiving pressurized fire extinguishant from the container and a distributing end connected to at least one nozzle for distributing fire extinguishant adjacent a stove-top heating ... ~ .,; .
- 3 - ~ ~ ;
. ;,;.
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`element; and an activa-tor for releasing the extinguishan-t into the receiving end of the conduit. ;~
In a preferred embodiment, the invention includes a thermally sensitive activator, whereby the fire extinguishant is released to deal with an unattended fire.
In a further preferred option, fire extinguishant is distributed generally upwardly in-the vicinity of every stove-top heating element, and in a more preferred embodiment, into an oven if present.
,~j; , .., :, In a more detailed embodiment of the invention, there is provided a fire extinguisher system for a stove having a stove-top including at least one stove element and optionally an oven, comprising: a container holding carbon dioxide under pressure; an activator for releasing the carbon dioxide; a conduit having a receiving end for receiving compressed carbon dioxide, and including pipes for conducting the carbon dioxide to at least one nozzle, each of which at least one nozzle is adapted to distribute carbon dioxide generally upwardly from underneath a stove element; at least one further nozzle adapted to distribute carbon dioxide into the oven if present; a switch means for de-activating the stove heating elements, including the oven iP present; wherein both the activator and the switch means are activated by a fusible link locatable above the ~tove.
The nature of each of these parts of the system to a certain extent depends on the type of stove to which they are fitted. The following discussion is concerned with the conventional domestic !stovel~ which generally has four top burners, an oven~ and sometimes a separate grilling unit. As will be readily apparent, the system can be altered to fit other types o~ stove, for example domestic units in which the stove-top and oven are separate units.
~."~ ~ '. '''"' ~ l o ~ rr~
; Although other types o~ e extingul~han~ such a~
pressurized dry powder, can be used, pressur:Lzed carbon dloxld~
is the preferred extinguishant. The technology to handle pressurized carbon dioxide is well known and readily available.
Carbon dioxide is clean in use, leaving no messy or -toxic residues. Carbon dioxide cools the fire area as well as -~
extinguishing the fire, thus inhibiting re-ignition.
The heat sensitive device used to activate the release of the fire extinguishant can be selected from several available devices. Preferably, a simple device is used, mainly to ensure reliability. A common one used in fire detection systems, and ~ ~
which is useable here, is a fusible link, which serves to hold ~ /;
two wires together under tension: sufficient heat causes the link to melt, thus activating the system by allowing the wires to move. Other devices which can be used are modified ;~ conventional fire detectors, which sense either temperature or ~ s combustion products in the atmosphere. In addition to sounding ~-an alarm, the device is modified to activate the fire extinguishing system. A device of this type can also be integrated into a general house security system monitored from ;~ ;;
outside the building.
; It is preferred that the system include a means to shut down the stove, thus diminishing significantly the possibility of reignition. The shut-off means used will depend on the type of stove~in use. For an electrical stove, all that is needed is a suitable resettable switch device. For a gas stove, which burns either natural gas, a town gas supply, or propane, a resettable gas valve unit is required. It is also desirable to provide a resettable electrical switch as well, since many gas stoves include both electrical ignition devices, a clock, and timer devices. - ~
,''';', :''"
It iq preferred that most of the system, particularly the carbon dioxide piping, the activator, and the nozzles, be -~
included in a stove when it is built, with the heat sensitive _ 5 - ~ ~
'', ;:
~109~
device being provided for mounting separately. Alternatlvely, the system can be provided as a kit of parts which are added to an existing stove unit.
BRI~F D~SCRIP~ION OF TE~ DRAWINGS
, ,. ~ ,., The embodiments of the invention will now be described ~ -with reference to the accompanying drawings in which~
Figure 1 shows a conventional domestic stove including the fire extinguishing system; - -~:
Figure 2 shows in more detail a fusible link device;
Figure 3 shows the activator and carbon dioxide cylinder; ~
Figure 4 shows the nozzle arrangement beneath a stove-top i -element;
Figure 5 shows the nozzle of Figure 9 in operation; and Figures 6, 7 and 8 show schematically the progression of a stove-top fire.
Similar references are used in different Figures to - denote similar components.
, ~:
D~TAILED DXSCRIPTION OF T~E INVENTION
Referring to Figures 1 through 3, the stove shown generally at 10 is equipped with a fire extinguisher system shown generally at 20. The fire extinguisher system 20 can be activated manually by operating lever 30 which, by exerting tension on cable 40, causes a fusible link 50 to break.
Alternatively, the fusible link 50 will melt and part when the air temperature around it rises sufficiently due to the presence o~ a fire on,the stove-top. Breakage or melting o~ the fusible link 50 causes a release of the tension on the link cable 60, which tension had been maintained by a tensioner 90, typically a spring.
Referring to Figure 3, it can be seen that the release of tension on the link cable 60 causes a release of the hammer '', ~'"'~''-",' :~. ~.;
~, ~ ;1 0 ~
80, which is blased towarcl the seal 120 by the hamm~r tensioner 90, typically a spring. ~ punch 100, whlch ls biaqed toward the hammer 80 by a punch spring 110, is thus d:riven downwardly t~
pierce a seal 120 of a container 130. Pressurized carbon dioxide 140 is thereby released into the primary pipe 150. The punch spring 110 serves to prevent the punch inadvertently rupturing the seal 120, and is significantly weaker than the hammer spring 90. After use, the carbon dioxide container 130 is detached by the conventional screw threads 131, and a new sealed container 130 inserted.
"' -. ' '.'.~"' The wire 160, connected to the hammer 80, is also . .
connected to the stove shut-off means 161. Hence, activation of :
the fire extinguishing system also shuts off the stove power supply, either electricity, or gas, or both, as appropriate.
, '.~,, :':
Referring to Figure 1, the carbon dioxide 140 is : :
directed through a main pipe 165 into an oven pipe 167, whereupon the pressure of the carbon dioxide 140 causes the oven flap 170 to pivot upwardly, thus allowing carbon dioxide to enter the oven ;:
180. The flap 170 is lightly biased against the end of pipe 167 to prevent splashes and the like from entering and obstructing ~ . ;
the pipe 162.
At the same time, carbon dioxide 140 is also directed to a distributor 190, where it is distributed among element pipes 200 and nozzles 210. -:
i ,~ l' ' . , ,~', Figure 9 shows one of the nozzles 210 prior to ;~ ;
activation of the extinguisher 20. The nozzle 210 is protected :
from grease and debris with a stopple 220. The nozzles 210 are shaped inteirnally to reléase the carbon dioxide 140 ' in a .-generally upward spray pattern. :~
Figure 5 shows schematically the operation of one of :~
the nozzles 210 following release of carbon dioxide 140 from the cylinder 20. The carbon dioxide 140 is directed upwardly to .
: . :, -- 7 -- :~
",, ','': ' ;',.';' : ., ~ ..
; ', ,: ~:,.:: ;~
:, ~on-tac-t the elernent Z30, and thc ho~-tom of a pot ~hown schematically as 2~0. The bottom o~ the pot 2~0 and the element 230 are cooled, which not only facilitates the extingulshing oP
the fire, but discourages re-igni-tion. Operation of the shut-off means 161 also cuts off the power supply to the electrical ;-element shown.
Figures 6, 7 and 8 illustrate schematically the progression of a typical stove-top fire. In Figure 6, a pot of flammable liquid 250 is seen to be overflowing. The liquid 250 -~
ignites upon contact with the hot element 230 creating a fire -~
251. Figure 7 shows the development of the fire 251 upwardly to include the liquid 250 still in the pot 240. Figure 8 illustrates the activation of the ~ire extinguisher system 20.
Heating of the fusible link by the flames 251 causes it to melt, activating the hammer 80 to release carbon dioxide 140. AS shown in Figure 8, the carbon dioxide 140 contacts the underside of the pot 240, the element 230, and is distributed around the pot. But carbon dioxide is also released from beneath the adjacent element -270 as shown schematically at 141, and is directed into the air -around the pot 240, serving both to cool the pot 240 and help extinguish the fire 251. The carbon dioxide subsequently sinks into the pot 240 onto the liquid 250, thus extinguishing any flames remaining in the pot itself. Nozzles 210 may also be placed elsewhere on the stove-top and the stove front to assist in providing an adequate carbon dioxide blanket. Such nozzles 210 !" ~ , are often called "exposure nozzles" as they reduce the risk of the fire spreading to areas surrounding the stove. Exposure nozzles, when used, generally discharge the carbon dioxide in a substantially hemispherical spray pattern.
Numerous modifications, variations, and adaptations may j~ :
be made to the particular embodiment of the invention described above without departing from the scope of the invention, which is defined in the claims. i; :~
,,.":
- 8 - ~ ~
~: ' '"
~'"''''": ' ' ''~"' '' ''''; .', ,,''';", 'i ', '
. ;,;.
,,, "', 21~rj~8 . ;
`element; and an activa-tor for releasing the extinguishan-t into the receiving end of the conduit. ;~
In a preferred embodiment, the invention includes a thermally sensitive activator, whereby the fire extinguishant is released to deal with an unattended fire.
In a further preferred option, fire extinguishant is distributed generally upwardly in-the vicinity of every stove-top heating element, and in a more preferred embodiment, into an oven if present.
,~j; , .., :, In a more detailed embodiment of the invention, there is provided a fire extinguisher system for a stove having a stove-top including at least one stove element and optionally an oven, comprising: a container holding carbon dioxide under pressure; an activator for releasing the carbon dioxide; a conduit having a receiving end for receiving compressed carbon dioxide, and including pipes for conducting the carbon dioxide to at least one nozzle, each of which at least one nozzle is adapted to distribute carbon dioxide generally upwardly from underneath a stove element; at least one further nozzle adapted to distribute carbon dioxide into the oven if present; a switch means for de-activating the stove heating elements, including the oven iP present; wherein both the activator and the switch means are activated by a fusible link locatable above the ~tove.
The nature of each of these parts of the system to a certain extent depends on the type of stove to which they are fitted. The following discussion is concerned with the conventional domestic !stovel~ which generally has four top burners, an oven~ and sometimes a separate grilling unit. As will be readily apparent, the system can be altered to fit other types o~ stove, for example domestic units in which the stove-top and oven are separate units.
~."~ ~ '. '''"' ~ l o ~ rr~
; Although other types o~ e extingul~han~ such a~
pressurized dry powder, can be used, pressur:Lzed carbon dloxld~
is the preferred extinguishant. The technology to handle pressurized carbon dioxide is well known and readily available.
Carbon dioxide is clean in use, leaving no messy or -toxic residues. Carbon dioxide cools the fire area as well as -~
extinguishing the fire, thus inhibiting re-ignition.
The heat sensitive device used to activate the release of the fire extinguishant can be selected from several available devices. Preferably, a simple device is used, mainly to ensure reliability. A common one used in fire detection systems, and ~ ~
which is useable here, is a fusible link, which serves to hold ~ /;
two wires together under tension: sufficient heat causes the link to melt, thus activating the system by allowing the wires to move. Other devices which can be used are modified ;~ conventional fire detectors, which sense either temperature or ~ s combustion products in the atmosphere. In addition to sounding ~-an alarm, the device is modified to activate the fire extinguishing system. A device of this type can also be integrated into a general house security system monitored from ;~ ;;
outside the building.
; It is preferred that the system include a means to shut down the stove, thus diminishing significantly the possibility of reignition. The shut-off means used will depend on the type of stove~in use. For an electrical stove, all that is needed is a suitable resettable switch device. For a gas stove, which burns either natural gas, a town gas supply, or propane, a resettable gas valve unit is required. It is also desirable to provide a resettable electrical switch as well, since many gas stoves include both electrical ignition devices, a clock, and timer devices. - ~
,''';', :''"
It iq preferred that most of the system, particularly the carbon dioxide piping, the activator, and the nozzles, be -~
included in a stove when it is built, with the heat sensitive _ 5 - ~ ~
'', ;:
~109~
device being provided for mounting separately. Alternatlvely, the system can be provided as a kit of parts which are added to an existing stove unit.
BRI~F D~SCRIP~ION OF TE~ DRAWINGS
, ,. ~ ,., The embodiments of the invention will now be described ~ -with reference to the accompanying drawings in which~
Figure 1 shows a conventional domestic stove including the fire extinguishing system; - -~:
Figure 2 shows in more detail a fusible link device;
Figure 3 shows the activator and carbon dioxide cylinder; ~
Figure 4 shows the nozzle arrangement beneath a stove-top i -element;
Figure 5 shows the nozzle of Figure 9 in operation; and Figures 6, 7 and 8 show schematically the progression of a stove-top fire.
Similar references are used in different Figures to - denote similar components.
, ~:
D~TAILED DXSCRIPTION OF T~E INVENTION
Referring to Figures 1 through 3, the stove shown generally at 10 is equipped with a fire extinguisher system shown generally at 20. The fire extinguisher system 20 can be activated manually by operating lever 30 which, by exerting tension on cable 40, causes a fusible link 50 to break.
Alternatively, the fusible link 50 will melt and part when the air temperature around it rises sufficiently due to the presence o~ a fire on,the stove-top. Breakage or melting o~ the fusible link 50 causes a release of the tension on the link cable 60, which tension had been maintained by a tensioner 90, typically a spring.
Referring to Figure 3, it can be seen that the release of tension on the link cable 60 causes a release of the hammer '', ~'"'~''-",' :~. ~.;
~, ~ ;1 0 ~
80, which is blased towarcl the seal 120 by the hamm~r tensioner 90, typically a spring. ~ punch 100, whlch ls biaqed toward the hammer 80 by a punch spring 110, is thus d:riven downwardly t~
pierce a seal 120 of a container 130. Pressurized carbon dioxide 140 is thereby released into the primary pipe 150. The punch spring 110 serves to prevent the punch inadvertently rupturing the seal 120, and is significantly weaker than the hammer spring 90. After use, the carbon dioxide container 130 is detached by the conventional screw threads 131, and a new sealed container 130 inserted.
"' -. ' '.'.~"' The wire 160, connected to the hammer 80, is also . .
connected to the stove shut-off means 161. Hence, activation of :
the fire extinguishing system also shuts off the stove power supply, either electricity, or gas, or both, as appropriate.
, '.~,, :':
Referring to Figure 1, the carbon dioxide 140 is : :
directed through a main pipe 165 into an oven pipe 167, whereupon the pressure of the carbon dioxide 140 causes the oven flap 170 to pivot upwardly, thus allowing carbon dioxide to enter the oven ;:
180. The flap 170 is lightly biased against the end of pipe 167 to prevent splashes and the like from entering and obstructing ~ . ;
the pipe 162.
At the same time, carbon dioxide 140 is also directed to a distributor 190, where it is distributed among element pipes 200 and nozzles 210. -:
i ,~ l' ' . , ,~', Figure 9 shows one of the nozzles 210 prior to ;~ ;
activation of the extinguisher 20. The nozzle 210 is protected :
from grease and debris with a stopple 220. The nozzles 210 are shaped inteirnally to reléase the carbon dioxide 140 ' in a .-generally upward spray pattern. :~
Figure 5 shows schematically the operation of one of :~
the nozzles 210 following release of carbon dioxide 140 from the cylinder 20. The carbon dioxide 140 is directed upwardly to .
: . :, -- 7 -- :~
",, ','': ' ;',.';' : ., ~ ..
; ', ,: ~:,.:: ;~
:, ~on-tac-t the elernent Z30, and thc ho~-tom of a pot ~hown schematically as 2~0. The bottom o~ the pot 2~0 and the element 230 are cooled, which not only facilitates the extingulshing oP
the fire, but discourages re-igni-tion. Operation of the shut-off means 161 also cuts off the power supply to the electrical ;-element shown.
Figures 6, 7 and 8 illustrate schematically the progression of a typical stove-top fire. In Figure 6, a pot of flammable liquid 250 is seen to be overflowing. The liquid 250 -~
ignites upon contact with the hot element 230 creating a fire -~
251. Figure 7 shows the development of the fire 251 upwardly to include the liquid 250 still in the pot 240. Figure 8 illustrates the activation of the ~ire extinguisher system 20.
Heating of the fusible link by the flames 251 causes it to melt, activating the hammer 80 to release carbon dioxide 140. AS shown in Figure 8, the carbon dioxide 140 contacts the underside of the pot 240, the element 230, and is distributed around the pot. But carbon dioxide is also released from beneath the adjacent element -270 as shown schematically at 141, and is directed into the air -around the pot 240, serving both to cool the pot 240 and help extinguish the fire 251. The carbon dioxide subsequently sinks into the pot 240 onto the liquid 250, thus extinguishing any flames remaining in the pot itself. Nozzles 210 may also be placed elsewhere on the stove-top and the stove front to assist in providing an adequate carbon dioxide blanket. Such nozzles 210 !" ~ , are often called "exposure nozzles" as they reduce the risk of the fire spreading to areas surrounding the stove. Exposure nozzles, when used, generally discharge the carbon dioxide in a substantially hemispherical spray pattern.
Numerous modifications, variations, and adaptations may j~ :
be made to the particular embodiment of the invention described above without departing from the scope of the invention, which is defined in the claims. i; :~
,,.":
- 8 - ~ ~
~: ' '"
~'"''''": ' ' ''~"' '' ''''; .', ,,''';", 'i ', '
Claims (22)
1. A fire extinguisher system for attachment to a stove, having a stove-top including at least one heating element, comprising: a container for pressurized fire extinguishant; a conduit having a receiving end for receiving pressurized fire extinguishant from the container and a distributing end connected to at least one nozzle for distributing fire extinguishant adjacent a stove-top heating element; and an activator for releasing the extinguishant into the receiving end of the conduit.
2. A system as defined in Claim 1, wherein the receiving end of the conduit is adapted to receive a container of pressurized gas extinguishant.
3. A system as defined in Claim 2, wherein the extinguishant is carbon dioxide.
4. A system as defined in Claim 1, wherein the conduit includes one or more pipes for conducting the extinguishant from the receiving end to the or each nozzle.
5. A system as defined in Claim 1, wherein at least one nozzle is locatable underneath each stove element.
b. A system as defined in Claim 5, wherein each nozzle locatable underneath a stove element is adapted to distribute extinguishant in a generally upward conical spray.
7, A system as defined in Claim 1, wherein at least one nozzle is locatable on the stove-top between stove elements for distribution of extinguishant on and above the stove-top.
8. A system as defined in Claim 7, including at least one nozzle locatable on the stove-top which distributes extinguishant in a generally convex upward hemispherical spray.
9. A system as defined in Claim 1, wherein the nozzles are protected by releasable stopples.
10. A system as defined in Claim 1, wherein the stove includes an oven, including a nozzle locatable adjacent the oven door, for distribution of extinguishant in front of the stove.
11. A system as defined in Claim 1, wherein the stove includes an oven and a nozzle locatable therein.
12. A system as defined in Claim 11, including a flap to protect the oven nozzle.
13. A system as defined in Claim 1, wherein the activator is activated by a heat sensitive device.
14. A system as defined in Claim 13, wherein the heat sensitive device includes a fusible link.
15. A system as defined in Claim 13, wherein the activator is manually operable.
16. A system as defined in Claim 15, wherein the heat sensitive device includes a fusible link, and the activator is manually operable by breaking the fusible link.
17. A system as defined in Claim 13, wherein the heat sensitive device is locatable above the stove-top.
18. A system as defined in Claim 1, including a switch means for deactivating the stove, activated by the activator.
19. A system as defined in Claim 1, further including an alarm activated by the activator.
20. A fire extinguisher system for a stove having a stove-top including at least one stove element and optionally an oven, comprising: a container holding carbon dioxide under pressure;
an activator for releasing the carbon dioxide; a conduit having a receiving end for receiving compressed carbon dioxide, and including pipes for conducting the carbon dioxide to at least one nozzle, each of which at least one nozzle is adapted to distribute carbon dioxide generally upwardly from underneath a stove element; at least one further nozzle adapted to distribute carbon dioxide into the oven if present; a switch means for de-activating the stove heating elements, including the oven if present; wherein both the activator and the switch means are activated by a fusible link locatable above the stove.
an activator for releasing the carbon dioxide; a conduit having a receiving end for receiving compressed carbon dioxide, and including pipes for conducting the carbon dioxide to at least one nozzle, each of which at least one nozzle is adapted to distribute carbon dioxide generally upwardly from underneath a stove element; at least one further nozzle adapted to distribute carbon dioxide into the oven if present; a switch means for de-activating the stove heating elements, including the oven if present; wherein both the activator and the switch means are activated by a fusible link locatable above the stove.
21. A fire extinguisher system as defined in Claim 1 in combination with a stove.
22. A fire extinguisher system as defined in Claim 20 in combination with a stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002109558A CA2109558A1 (en) | 1993-11-19 | 1993-11-19 | Stove-top and oven fire extinguisher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002109558A CA2109558A1 (en) | 1993-11-19 | 1993-11-19 | Stove-top and oven fire extinguisher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2109558A1 true CA2109558A1 (en) | 1995-05-20 |
Family
ID=4152510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002109558A Abandoned CA2109558A1 (en) | 1993-11-19 | 1993-11-19 | Stove-top and oven fire extinguisher |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2109558A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3180094A4 (en) * | 2014-08-11 | 2017-08-16 | Shaviv Ben Neria | Fire suppression device |
| WO2019075199A1 (en) * | 2017-10-13 | 2019-04-18 | Carrier Corporation | System and method for delivering fire suppression agent to an obstructed gas appliance |
| WO2019075158A1 (en) * | 2017-10-13 | 2019-04-18 | Carrier Corporation | System and method for delivering a cooling agent to a gas-fueled cooking appliance to aid in fire suppression |
| GR1010120B (en) * | 2021-02-02 | 2021-11-09 | Θωμας Χρυσοστομου Μαλαμιδης | Shut-off valve with valve handle furnished with a specific actuation-operation spring - automatic or manual actuation of the system |
-
1993
- 1993-11-19 CA CA002109558A patent/CA2109558A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3180094A4 (en) * | 2014-08-11 | 2017-08-16 | Shaviv Ben Neria | Fire suppression device |
| WO2019075199A1 (en) * | 2017-10-13 | 2019-04-18 | Carrier Corporation | System and method for delivering fire suppression agent to an obstructed gas appliance |
| WO2019075158A1 (en) * | 2017-10-13 | 2019-04-18 | Carrier Corporation | System and method for delivering a cooling agent to a gas-fueled cooking appliance to aid in fire suppression |
| US11491356B2 (en) | 2017-10-13 | 2022-11-08 | Carrier Corporation | System and method for delivering fire suppression agent to an obstructed gas appliance |
| US11497950B2 (en) | 2017-10-13 | 2022-11-15 | Carrier Corporation | System and method for delivering a cooling agent to a gas-fueled cooking appliance to aid in fire suppression |
| GR1010120B (en) * | 2021-02-02 | 2021-11-09 | Θωμας Χρυσοστομου Μαλαμιδης | Shut-off valve with valve handle furnished with a specific actuation-operation spring - automatic or manual actuation of the system |
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