CA2186579C - Flammable fluid heating apparatus - Google Patents
Flammable fluid heating apparatus Download PDFInfo
- Publication number
- CA2186579C CA2186579C CA002186579A CA2186579A CA2186579C CA 2186579 C CA2186579 C CA 2186579C CA 002186579 A CA002186579 A CA 002186579A CA 2186579 A CA2186579 A CA 2186579A CA 2186579 C CA2186579 C CA 2186579C
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- CA
- Canada
- Prior art keywords
- combustion chamber
- air
- heater
- flammable fluid
- primary combustion
- Prior art date
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- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/002—Stoves
- F24C3/006—Stoves simulating flames
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F24B1/00—Stoves or ranges
- F24B1/18—Stoves with open fires, e.g. fireplaces
- F24B1/1808—Simulated fireplaces
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
- Resistance Heating (AREA)
- Solid-Fuel Combustion (AREA)
- Gas Burners (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
This invention provides a flammable fluid fuelled heater providing a direct opening into the primary combustion chamber to provide an unobstructed view of the fire. Any circulating means such as a fan may be provided adjacent the opening so as to provide an air curtain across the opening. This may limit the flow of air through the opening to reduce overall throughput as well as reducing spillage out the opening. In addition, the artificial log assembly in the fire may be arranged so that at least some of the logs meet collective surfaces at right angles so as to provide a visual continuity into the reflective surface and thereby provide a larger visual appearance to the fire.
Description
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(i) Figlfl of the 2avenCioa This invention relates to flammable fluid fuelled heaters and, in particular, although not neceseaxily solely, gaa fuelled heaters.
(ii,) Deacrinr on og the Pr p,r Art Traditional flammable fluid fuelltd heaters such as gas fuelled heaters comprise a combustion chamber into which the flammqblQ fluid ie supplied and may be provided with an exhaust into the room into which the heater is housed. Such #luelees unite may bQ provided with catalytic converters forming a secondary combustion chamber above the primary combustion chamber to reduce the emiasions in the exhaust. However, in trying to provide such units with an open front wall to provide an unobstructed view of the flames in accordance with a conventional fireplace, some difficulties might arise in minimi ing the size of that catalytic converter duQ to the large open front area for the drawing of air into the primary combustion unit increasing the overall throughput of the heater. A catalytic convertez of reduced sixe causes a obstruction to the flow of air through the heater and this may lead to spilling of emissions directly from the primary combustion out through the open front of the unit and into the room into which the unit in housed. This can cause problems with such emissions reaching levels that are either unaafe or at least outside regulatory guidelines.
006493732123 PAt3E.002 - - - -~ Y3V S 5 : T T 9 fi '!D 2 ~
c c d Another aspect of traditional fireplaces is attempts to provide a realistic artificial log assembly in the combustion chamber. There may be a preference for a primary combustion chamber and associated artificial log assembly which attempts to provide a visually larger fire than is physically present so that the overall size of the heater unit may be minimised by still providing a relatively large apparent fire area. Such traditional technology has included the provision of a mirror behind the artificial log assembly and primary combustion chamber. However, the reflected image in the mirror does not always provide a realistic appearance if there is a visually apparent division between the real image and the reflected image The present invention provides a flammable fluid fuelled heater which may overcome or minimise any one or more of these disadvantages or at least provide the public with a useful choice.
Accordingly, in a first aspect, the invention comprises a flammable fluid fueled heater comprising:
a primary combustion chamber having an opening in at least one side thereof for providing a view of a substantial portion of the primary combustion chamber;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantial portion of yellow flame, wherein upon combustion exhaust gases are generated;
a secondary combustion chamber in communication with the primary combustion chamber for receiving exhaust gases generated in the primary combustion chamber, the secondary combustion chamber comprising a catalytic converter;
an exhaust port in communication with the secondary combustion chamber for redirecting at least a portion of the exhaust gases received into the secondary combustion chamber into a room where the heater is located;
(i) Figlfl of the 2avenCioa This invention relates to flammable fluid fuelled heaters and, in particular, although not neceseaxily solely, gaa fuelled heaters.
(ii,) Deacrinr on og the Pr p,r Art Traditional flammable fluid fuelltd heaters such as gas fuelled heaters comprise a combustion chamber into which the flammqblQ fluid ie supplied and may be provided with an exhaust into the room into which the heater is housed. Such #luelees unite may bQ provided with catalytic converters forming a secondary combustion chamber above the primary combustion chamber to reduce the emiasions in the exhaust. However, in trying to provide such units with an open front wall to provide an unobstructed view of the flames in accordance with a conventional fireplace, some difficulties might arise in minimi ing the size of that catalytic converter duQ to the large open front area for the drawing of air into the primary combustion unit increasing the overall throughput of the heater. A catalytic convertez of reduced sixe causes a obstruction to the flow of air through the heater and this may lead to spilling of emissions directly from the primary combustion out through the open front of the unit and into the room into which the unit in housed. This can cause problems with such emissions reaching levels that are either unaafe or at least outside regulatory guidelines.
006493732123 PAt3E.002 - - - -~ Y3V S 5 : T T 9 fi '!D 2 ~
c c d Another aspect of traditional fireplaces is attempts to provide a realistic artificial log assembly in the combustion chamber. There may be a preference for a primary combustion chamber and associated artificial log assembly which attempts to provide a visually larger fire than is physically present so that the overall size of the heater unit may be minimised by still providing a relatively large apparent fire area. Such traditional technology has included the provision of a mirror behind the artificial log assembly and primary combustion chamber. However, the reflected image in the mirror does not always provide a realistic appearance if there is a visually apparent division between the real image and the reflected image The present invention provides a flammable fluid fuelled heater which may overcome or minimise any one or more of these disadvantages or at least provide the public with a useful choice.
Accordingly, in a first aspect, the invention comprises a flammable fluid fueled heater comprising:
a primary combustion chamber having an opening in at least one side thereof for providing a view of a substantial portion of the primary combustion chamber;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantial portion of yellow flame, wherein upon combustion exhaust gases are generated;
a secondary combustion chamber in communication with the primary combustion chamber for receiving exhaust gases generated in the primary combustion chamber, the secondary combustion chamber comprising a catalytic converter;
an exhaust port in communication with the secondary combustion chamber for redirecting at least a portion of the exhaust gases received into the secondary combustion chamber into a room where the heater is located;
and an air circulating means for providing a stream of air across at least a portion of said opening.
Accordingly, in a second aspect, the invention comprises a flammable fluid fueled heater comprising:
a primary combustion chamber having an opening in at least on side thereof to provide a view of at least a substantial portion of said primary combustion chamber;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantial portion of yellow flame and generate products of combustion;
a secondary combustion chamber in communication with the primary combustion chamber for receiving products of combustion from the primary combustion chamber said secondary combustion chamber comprising a catalytic converter;
an air circulating means for assisting in the drawing of the products of combustion through said secondary combustion chamber; and an exhaust port in communication with the secondary combustion chamber for receiving the products of combustion and exhausting at least a portion of said products into a room where the heater is located.
The present invention also provides a flammable fluid fueled heater comprising:
a housing having an opening;
a primary combustion chamber within the housing, the primary combustion chamber having an opening in at least one side thereof aligned with the housing opening providing a view of the combustion chamber from a location external to the housing;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantially yellow flame;
a secondary combustion chamber comprising, an intake in communication with the primary combustion chamber for receiving products of combustion from the primary combustion chamber, a catalytic converter, and an exhaust for exhausting the products of combustion;
Accordingly, in a second aspect, the invention comprises a flammable fluid fueled heater comprising:
a primary combustion chamber having an opening in at least on side thereof to provide a view of at least a substantial portion of said primary combustion chamber;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantial portion of yellow flame and generate products of combustion;
a secondary combustion chamber in communication with the primary combustion chamber for receiving products of combustion from the primary combustion chamber said secondary combustion chamber comprising a catalytic converter;
an air circulating means for assisting in the drawing of the products of combustion through said secondary combustion chamber; and an exhaust port in communication with the secondary combustion chamber for receiving the products of combustion and exhausting at least a portion of said products into a room where the heater is located.
The present invention also provides a flammable fluid fueled heater comprising:
a housing having an opening;
a primary combustion chamber within the housing, the primary combustion chamber having an opening in at least one side thereof aligned with the housing opening providing a view of the combustion chamber from a location external to the housing;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantially yellow flame;
a secondary combustion chamber comprising, an intake in communication with the primary combustion chamber for receiving products of combustion from the primary combustion chamber, a catalytic converter, and an exhaust for exhausting the products of combustion;
5 a duct between the housing and the primary combustion chamber for receiving air from a source external to the heater, the duct providing a flow of air over the exhaust; and an air circulating means for increasing the circulation of air through said duct for creating an air stream across the secondary combustion chamber exhaust for increasing the throughput through the catalytic converter.
Further aspects of this invention will become apparent to those skilled in the art upon reading the following description.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described with reference to the following drawings in which:
Figure 1 shows a cross-sectional view through one possible embodiment of the apparatus; and Figure 2 shows a front elevational view of the apparatus of Figure 1.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Preferred forms of the invention may be seen with reference to the figures in which a flammable fluid fuelled heater 1 having a primary combustion chamber 2 is provided. The primary combustion chamber is provided with a flammable fluid fuel supply 3 to provide a flammable fluid such as liquidified petroleum gas or compressed natural gas or other such fuels for combustion in the primary combustion chamber.
4U,4Cf.ly'JU 10. J'J DALUffIIY oUll a Utth4C 21 86579 1tv.1uid t, b,cl An outer housin9 4 may be providad to hous4 the apparatus and, in at least this preferred form of the invention, the primary combustion chamber 2 and outer housing 4 are provided with an opening 5 providing an unobstructed view of a subatAntial portion of the primary coenbuetion chamber 2 and, in particular, that region in which combustion is occurring.
To provide a viaually aesthetic fire, the fuel supply through the inlet 3 and the combustion characteristics within the primary combuation chamber 2 are such ao to provide a flame having a substantially yellow appearance. To achieve this, the primary combustion chamber 2 must be depleted of vxygem content and this requires strict control over the inlet of oxygenated air into the primary combustion chamber 2 as well as the mixture of the fuel provided through the inlet 3.
The yellow flame characteristic providing a more aeathetically pleasing fireplace, also requires some incomplete combuation of the fuel in the primary combustion chamber. The emissions from'such aesthetically pleasing flames are higher than a comparable heater a,esembly which is configured to burn with a substantially clean blue flame. Therefore, there is some risk that spillage of the products of the primary combustion through the open front 5 may lead to the room in which the heater is housed, having raised levels of carbon monoxide and carbon dioxide.
SEP 26 '96 00108 006493732123 PAtiE.006 LOd m2-~r9S : i T 96 '9Z '60 .. .__ ~..M..rw cu. icr, lyyo Io= nnLunld avtr a Uncr 218(~!579 Iyu. tuI d c, ,lcl Although it ia perhaps possibla to reduce such spillage through increasing the throughput through the apparatus 1 such that the large opening 5into the primary combustion chamber 2 has sufficient draught to inhibit the exiting of the products of primary combustion through that opening, such a throughput leads to difficulty in achieving the yellow flames while still operating efficient3.y. Further, a large throughput requires a larger = catalytic converter to accommodate the air flow. Also this increased throughput will have a cooling effect on a catalyst which ittcreases the difficulty in achieving light off temperature.
The present invention provides an air circulating means 6 which may be of any convenient type to create an airstream or draught ", in thia preferred form, ia provided as a fan. The circulating means 6 is provided to create a stream of air 7 which projects acroQS the opening S. Such an air,stream both reduces the effective size of the opening 5 for air inlet which improves the ability to deplete the oxygeri within the primary combustion chamber ao well as inhibiting the spillage of the products of combustion adjacent the upper edge of the opening S. This is particularly the case when the airstream 7 is provided to project downwardly from an upper edge of the opening 5 as indicated in Figure 1.
In additioa, this form of the invention also providers a deflector a running across the airstream to deflect some of the aizstream back into the primary combustion chamber 2 which further SEP 26 196 0Qr@1 006493732123 PACiE.007 .~-i=t v 9 5 : 1 i 9 B ' 9 2 eoa tU. iL(. IyyU 10;Jy D11LUO11r JUIV d~Mrr 2186579 'yU, lUlb r. tlill helps to reduce spillage of products from the primary combust3.on as designated by arrow 9.
Again in the preferred form, the heating apparatus I may be provided as a flueless unit as indicated or, a unit in which at least a portion of the exhaust from the heater is directed into the room in which the heater 1 is housed. To improve the standard of those emissions, a secondary combustion chamber 10 which includes or comprises a catalytic converter may be provided. in this manner, the products of primary combustion may b~ drawn through the catalytic converter 10 and through an exhaust port 11 into the room in which the heater Is houaed and be relatively low in uncombustad bydrocarbons such as carbon monoxide and other pollutanta. With the air inlet being provided at leaat partially by the open front 5, not only are the products of the primary combustion chamber furthsr combusted to improve the exhaust quality but other odoura in the room such as cooking odoure may be removed through the catalytic converter 10.
Ca.talytic'converters for such apparatus are relatively expensive and, therefore, the size of the catalytic converter required can become an important factor in providing a cost efficient heater. The minimieation of the aize of the catalytic converter will also decrease the throughput capable from the catalytic converter 10. It is normal in such units for the catalytic converter 10 to provide the greatest reatriction to flow in the entire apparatus and this tends to increase any potential SEP 26 '96 0Q:e1 006493732123 PACE.608 T
Further aspects of this invention will become apparent to those skilled in the art upon reading the following description.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described with reference to the following drawings in which:
Figure 1 shows a cross-sectional view through one possible embodiment of the apparatus; and Figure 2 shows a front elevational view of the apparatus of Figure 1.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Preferred forms of the invention may be seen with reference to the figures in which a flammable fluid fuelled heater 1 having a primary combustion chamber 2 is provided. The primary combustion chamber is provided with a flammable fluid fuel supply 3 to provide a flammable fluid such as liquidified petroleum gas or compressed natural gas or other such fuels for combustion in the primary combustion chamber.
4U,4Cf.ly'JU 10. J'J DALUffIIY oUll a Utth4C 21 86579 1tv.1uid t, b,cl An outer housin9 4 may be providad to hous4 the apparatus and, in at least this preferred form of the invention, the primary combustion chamber 2 and outer housing 4 are provided with an opening 5 providing an unobstructed view of a subatAntial portion of the primary coenbuetion chamber 2 and, in particular, that region in which combustion is occurring.
To provide a viaually aesthetic fire, the fuel supply through the inlet 3 and the combustion characteristics within the primary combuation chamber 2 are such ao to provide a flame having a substantially yellow appearance. To achieve this, the primary combustion chamber 2 must be depleted of vxygem content and this requires strict control over the inlet of oxygenated air into the primary combustion chamber 2 as well as the mixture of the fuel provided through the inlet 3.
The yellow flame characteristic providing a more aeathetically pleasing fireplace, also requires some incomplete combuation of the fuel in the primary combustion chamber. The emissions from'such aesthetically pleasing flames are higher than a comparable heater a,esembly which is configured to burn with a substantially clean blue flame. Therefore, there is some risk that spillage of the products of the primary combustion through the open front 5 may lead to the room in which the heater is housed, having raised levels of carbon monoxide and carbon dioxide.
SEP 26 '96 00108 006493732123 PAtiE.006 LOd m2-~r9S : i T 96 '9Z '60 .. .__ ~..M..rw cu. icr, lyyo Io= nnLunld avtr a Uncr 218(~!579 Iyu. tuI d c, ,lcl Although it ia perhaps possibla to reduce such spillage through increasing the throughput through the apparatus 1 such that the large opening 5into the primary combustion chamber 2 has sufficient draught to inhibit the exiting of the products of primary combustion through that opening, such a throughput leads to difficulty in achieving the yellow flames while still operating efficient3.y. Further, a large throughput requires a larger = catalytic converter to accommodate the air flow. Also this increased throughput will have a cooling effect on a catalyst which ittcreases the difficulty in achieving light off temperature.
The present invention provides an air circulating means 6 which may be of any convenient type to create an airstream or draught ", in thia preferred form, ia provided as a fan. The circulating means 6 is provided to create a stream of air 7 which projects acroQS the opening S. Such an air,stream both reduces the effective size of the opening 5 for air inlet which improves the ability to deplete the oxygeri within the primary combustion chamber ao well as inhibiting the spillage of the products of combustion adjacent the upper edge of the opening S. This is particularly the case when the airstream 7 is provided to project downwardly from an upper edge of the opening 5 as indicated in Figure 1.
In additioa, this form of the invention also providers a deflector a running across the airstream to deflect some of the aizstream back into the primary combustion chamber 2 which further SEP 26 196 0Qr@1 006493732123 PACiE.007 .~-i=t v 9 5 : 1 i 9 B ' 9 2 eoa tU. iL(. IyyU 10;Jy D11LUO11r JUIV d~Mrr 2186579 'yU, lUlb r. tlill helps to reduce spillage of products from the primary combust3.on as designated by arrow 9.
Again in the preferred form, the heating apparatus I may be provided as a flueless unit as indicated or, a unit in which at least a portion of the exhaust from the heater is directed into the room in which the heater 1 is housed. To improve the standard of those emissions, a secondary combustion chamber 10 which includes or comprises a catalytic converter may be provided. in this manner, the products of primary combustion may b~ drawn through the catalytic converter 10 and through an exhaust port 11 into the room in which the heater Is houaed and be relatively low in uncombustad bydrocarbons such as carbon monoxide and other pollutanta. With the air inlet being provided at leaat partially by the open front 5, not only are the products of the primary combustion chamber furthsr combusted to improve the exhaust quality but other odoura in the room such as cooking odoure may be removed through the catalytic converter 10.
Ca.talytic'converters for such apparatus are relatively expensive and, therefore, the size of the catalytic converter required can become an important factor in providing a cost efficient heater. The minimieation of the aize of the catalytic converter will also decrease the throughput capable from the catalytic converter 10. It is normal in such units for the catalytic converter 10 to provide the greatest reatriction to flow in the entire apparatus and this tends to increase any potential SEP 26 '96 0Q:e1 006493732123 PACE.608 T
8 Od D~Y9~ T 9 B
6.61, -1-1, i JdV IJ.UU lJn6LtI ltf wl! 0 LAltui 2186579 IIU. IUIU C. y,41 problems with spillage of productc directly from the primary combustion chamber.
In the present invention, an air duct 12 may be provided in ~ communication with the aeoondary combustion chamber or catalytic converter 10 and the exhaust port 11 eo as to creata an aixatre+am across the outlet from the secondary combustion chamber 10. The duct 12 is also in communication with the air circulating means 6 to create the airstream and the flow of this airstream across the exit from the catalytic eonvarter and provides the draft through the catalytic convexter to improve overall throughput. Not only may such an arrangement improve the performance of the catalytic converter but alao xeduce the restriction that the converter provides in the apparatus and therefore decreasing the quantity of circulating products from the primary combustion as indicated by arrow 9.
The ducting 12 may also provide a number of other function$
such as providing a fxe6h cooler airstream within the housing 4 to reduce the temperatures of the outer panels of the overall apparatua 1 forming the housing 4. Furthermore, should it be desired, the housing 4 and ducting 12 may be provided with an inlet 14 for connection to a vent to an area external to the room in which the heater is housed such as to the outside of a building. Such an inlet 14 allows ventilation of the room in conjunction with the heater apparatus 1.
SEP 26 '96 00:01 008493732123 PAGE.009 0 T d 9 : i T 9 B '9 2 'B O
yiy9 cU. 0C1 lyyu IUV DdLUM-ll July d Ml(L'1 2 1 V 6579 NU.lUlu C. IU141 .1o Altarnatively or additionally, the i,nlet for tha ducting 12 may be in the baso of the heater below the primary combustion chamber 2 such as the inlet 15.
The air circulating maans 6 may be provided in a number of forms and aloo in a number of positions. In the preferred apparatus ao shown in figure 1, the air circulating means 6 may be pxovidad anywhere on communication with the ducting 12 to direct the airstream as suggested. This include9 the positioning in a region beneath the primary combustion chamber 2 auch as between the inleCa 15 and 14, It ahould also be noted that the inlet 14 for connection to an external source of air may be provided ae an adjustable inlet so that the proportion of air drawn from an external source and the proportion of air drawn through an i.nlet such as inlet is from within the room can be balanced. This adjuatment may be through the form of a baffle plate or similar which can adjust the size of the opening 14. This adjustment may be provided during manufacture and set to a suitable level or allow some manual or controlled adjustment.
In addition or alternatively to the baffle plate or similar control over the vent, the air circulating means 6 may be provided in the form of a variable speed fan to increase draft through the ducting 12 to increase the drawing of air from the outside. Of course, in a preferred form, it may be desirable to provide separate air circulating meana 6 with at leaat one of these air SEP 26 '36 88:01 008493732193 PA(3E,010 - YtiIY 9 5 : I T 9 B 9 Z ' B O
T T d ca. aer. lyyb ly UU CRLUYIItv SUh d ~xKC7 21$ 65 79 NU. lUid r. 11/~1 - 13. -cxrculating means being primarily to draw air through the inlet 14 from an external source. This additional air circulating means or other form of control over the inlet 14 may be linked to a heater control system (not ahown) to allow variation in the inlet air.
In aoms territories, regulatory requirements eet down levels for ventilation in a room in which such a heater is housed. The air drawn thxough the inlet 34 from an external source may be measured through the inclusion of a suitable air flow sensor to ensure that the adequate ventilation I.avels are being met. This provideo'a verifiable control over the air coming into the room in which the heater is housed which w,i11 force air from within that room out through any available exit. Should the inlet air fall below a minimum limit, the heater can attempt to compensate by increasing the tan spoad, si,ze of the inlet vent or, if necessary, turn the unit off rather than continue to operate below a minimum level. This may involve a link into the gas supply to shut off the unit if the ventilation requirements are not being met.
The contrdl over this inlet air from an external source can also provide other benefits. In a controlled heater which may involve a thermostatic contxol or similar, the quantity of gas being supplied to the unit may be adjusted to control the heat output from the heater. For example, a heating appliance may have a maximum capacity of 25MJ. Once the thermostatic or other controller suggaato that the heater should reduce its output, t,hig may be controlled through control of the quantity of gas supplied into the unit. However, as this gas supp7.y continues to reduce, SEP 26 '96 00002 006493732123 PAGE.011 ---- ~ -2 0 d YSd I 2 : i 0 9 B 19 2'6 0 ~U. VLa, 1o9U IJ.UU UnLLrtllr vvil z 4M1A4;i 2 1 865 79 itU. lU10 1 . lLrL1 -the flame height on the unit may also be effected. Once the gas consumption falls below, for example, half its maximum level, it may be decided that the flame height is now insufficient to provide a visually aesthetic appearance. In circumstances where gas qonsumption is of prime importance, such a reduction in flame height may be of no great concerz'n,. However, if the visual appearanap of the fire is considered more impoxtant, it may be deeirabla to make the unit operate less efficiently so as to inereaae the flame height.
one manner of achieving this can be by again increasing the air flow from outside of the room in which the heater is housed.
This increase of inlet air will effectively dump heated air within the room out through any available means. This dumping of heated air withizi the room allows the unit to continue to operate with a higher gaa flow and greater heat output and hence higher visible flame.
Of course, control of the unit may also alter air flow through the unit and gas consumption as other variables related to the efficiency of the heater, heat autput and flame height.
Flammaba.e fluid fuelled heaters 1 such as shown in the prevsnt invention are also often provided with an artificial log assembly within the primary combustion chamber 2 so as to give the appearance of a wood fire place. Any attempts to minimise the size of the overall heatex 7, lead to sorne compromise being made in SEP 26 '96 00:02 006493732123 PAG6.012 E 0 d wd T 2 : T 0 9 6 '9 7- 'B 0 ~.u, oct, lyyu ly.Ul DRLOr111 M a ~AKC[ 2 1 86579 NV, lUld t', IJ,11 - ~3 -the size of the fire and the artificial log assembly such as the artificial log assembly 16 compriaing artificial logs 17.
In an attempt to provide a larger visual appearance to the fire, at least one portion of the primary combuation chamber 2 may be provided with a reflective surface such as the back wall 18.
In thia preferred form of the invention, the primary combuati,on chamber 2 ie also provided with side walls 19 and 20 which are also provided as reflective surfaces to give a reflected image of the log aaaelNbly l6 and flames 21.
The problem with such reflective surfaces is often the appearance of two separate or distinet fires being the artificial log aeeeMbly 15 and flames 21 and the reflected image of both.
There is an apparent discontinuity between the two images. In the present preferred embodiment, artificial logs 17 are provided to abut the roflactive surfaces to provide an apparent continuity of the log into the reflective surface.
Refsrring'to tha rear base log 22 of the aaoembly 16, it can be seen that the upper edge 23 of this log is provided to abut the reflective back wall 18. As such the base log 22 is provided as a half round log in the artificial log assembly 16. Upon being abutted to the reflective aurface 18, the reflective surface 18 provides a continuity to this log to give the appearance of a full round log when the real and reflected images of the base log 22 are varied. The base log 22 is provided having a longitudinal axis substantially paxallal to the rear wall le.
SEF' 26 195 M02 006493732123 PA3E.813 isDa mta I 3 : I 0 9B '9Z 'Bd 6,V= ~L 1J9U LUI DnLUvIU dUN R 1dAGI 2186579 LVU, 1~j1Q t. 14/41 Similarly, additional loga 24 may be provided which abut the rear wall ie such that thQ longitudinal axis of the loga 24 is substantially transverse to the plane of the rear wa11 18, in this manner, the length of the log 24 appears to be extended in the reflective image and again providing some continuity into the reflected image.
In this preferred form where aide walls 19 and 20 are also provided with reflective surfaces, the logs abutting those surfacQa rzuch as the front log 17 abut the side wall 20 substantially perpendicular to the plane of that reflective surface to provide some continuity into the reflective surtace-In this pxefRrred form, at least a portion of the flames 21 will be provided intermediate of the loga perpendicular to the rear wall lA such as logs 24 and the side walls 19 and 20 so as not to provide a gap in the flames in the primary combustion chamber and shown in thQ reflective surface of the side walls 19 and 20.
Another feature of the artificial log assembly 16 in this preferred form is that the logs such as log 17 across the heater I
may be provided with a discontinuity such as a burnt out portion 25. Such artificial log aesemblies are often constructed from ceramic fibre logs and these may have substantial variations in shrinkage in production. Therefore, the provision of logs across the heating apparatus 1 to accurately abut against both the side wall,i 19 and 20 can be exceedingly difficult. The provision of SEP 26 186 00s02 006493732123 PRGE.014 9~p d~~ 7/~d T 2 : T 0 9 6 19 2'fi O
4V- w11, tJJV 14.V, ..if 2 18 6 5 7 9"I,U. ~u IQ ,. LJ, L , -is -the burnt out portion 16 allows the transverse log such as log 17 to be providRd with an apparent naturally occurring reason for not extending entirely acros~ the fire and creating the potential for gaps against the side walls 19 and 20 should a tight abutment against both be unable to be achieved.
The provision of the rQflected extension of tha Xoga 17,24, etc., may lead to the selection of loqs having diameters larger than chosen for a normal aaaemb7,y. The diameters are chosen in keeping with those that appear natural for a fixe a4 provided by both the real and reflective images combined and in keeping with the greater apparent length of the logs=
Thus it can be seen that at least the preferred form of thia invention provides a heating apparatus I which may provide an open front S and yet provide some inhibition to the spil],age of gases from the primary combustion chamber 2, In addition, the heater 1 providee an artificial log assembly having reflective surfaces around the perimeter of the primary combustion chamber and the artificial log assembly having logis abutting the reflective surfaces ae as to provide the appearance of continuity into the reflective surfaces.
14'here in the foregoing description reference has been made to specific components or integers of the invention having equivalents then such equivalents are herein incorporated as if individually set forth.
SEP 26 '86 00:03 006493732123 PA(iE.015 .r..~...r.-9 0 d YSd T 2 : T 0 9 6 '9 3 'B O
co, )Lr, lyyb ly Ul tiALUnIN bUIV * ti,RKrY 2186579 NU, lUf8 Y, lbill . 16 -Although this invention hes been descri.bed by way of exmmple and with reference to possible embodimenta thereof it ia to be understood thst modifications or improvements may be made thereto without departing from the scope of the invention.
26 September 1996 SEP 26 '96 00;03 006493732123 PAGE.016 LOd Y+Id T z: T O 9B 9Z BG
6.61, -1-1, i JdV IJ.UU lJn6LtI ltf wl! 0 LAltui 2186579 IIU. IUIU C. y,41 problems with spillage of productc directly from the primary combustion chamber.
In the present invention, an air duct 12 may be provided in ~ communication with the aeoondary combustion chamber or catalytic converter 10 and the exhaust port 11 eo as to creata an aixatre+am across the outlet from the secondary combustion chamber 10. The duct 12 is also in communication with the air circulating means 6 to create the airstream and the flow of this airstream across the exit from the catalytic eonvarter and provides the draft through the catalytic convexter to improve overall throughput. Not only may such an arrangement improve the performance of the catalytic converter but alao xeduce the restriction that the converter provides in the apparatus and therefore decreasing the quantity of circulating products from the primary combustion as indicated by arrow 9.
The ducting 12 may also provide a number of other function$
such as providing a fxe6h cooler airstream within the housing 4 to reduce the temperatures of the outer panels of the overall apparatua 1 forming the housing 4. Furthermore, should it be desired, the housing 4 and ducting 12 may be provided with an inlet 14 for connection to a vent to an area external to the room in which the heater is housed such as to the outside of a building. Such an inlet 14 allows ventilation of the room in conjunction with the heater apparatus 1.
SEP 26 '96 00:01 008493732123 PAGE.009 0 T d 9 : i T 9 B '9 2 'B O
yiy9 cU. 0C1 lyyu IUV DdLUM-ll July d Ml(L'1 2 1 V 6579 NU.lUlu C. IU141 .1o Altarnatively or additionally, the i,nlet for tha ducting 12 may be in the baso of the heater below the primary combustion chamber 2 such as the inlet 15.
The air circulating maans 6 may be provided in a number of forms and aloo in a number of positions. In the preferred apparatus ao shown in figure 1, the air circulating means 6 may be pxovidad anywhere on communication with the ducting 12 to direct the airstream as suggested. This include9 the positioning in a region beneath the primary combustion chamber 2 auch as between the inleCa 15 and 14, It ahould also be noted that the inlet 14 for connection to an external source of air may be provided ae an adjustable inlet so that the proportion of air drawn from an external source and the proportion of air drawn through an i.nlet such as inlet is from within the room can be balanced. This adjuatment may be through the form of a baffle plate or similar which can adjust the size of the opening 14. This adjustment may be provided during manufacture and set to a suitable level or allow some manual or controlled adjustment.
In addition or alternatively to the baffle plate or similar control over the vent, the air circulating means 6 may be provided in the form of a variable speed fan to increase draft through the ducting 12 to increase the drawing of air from the outside. Of course, in a preferred form, it may be desirable to provide separate air circulating meana 6 with at leaat one of these air SEP 26 '36 88:01 008493732193 PA(3E,010 - YtiIY 9 5 : I T 9 B 9 Z ' B O
T T d ca. aer. lyyb ly UU CRLUYIItv SUh d ~xKC7 21$ 65 79 NU. lUid r. 11/~1 - 13. -cxrculating means being primarily to draw air through the inlet 14 from an external source. This additional air circulating means or other form of control over the inlet 14 may be linked to a heater control system (not ahown) to allow variation in the inlet air.
In aoms territories, regulatory requirements eet down levels for ventilation in a room in which such a heater is housed. The air drawn thxough the inlet 34 from an external source may be measured through the inclusion of a suitable air flow sensor to ensure that the adequate ventilation I.avels are being met. This provideo'a verifiable control over the air coming into the room in which the heater is housed which w,i11 force air from within that room out through any available exit. Should the inlet air fall below a minimum limit, the heater can attempt to compensate by increasing the tan spoad, si,ze of the inlet vent or, if necessary, turn the unit off rather than continue to operate below a minimum level. This may involve a link into the gas supply to shut off the unit if the ventilation requirements are not being met.
The contrdl over this inlet air from an external source can also provide other benefits. In a controlled heater which may involve a thermostatic contxol or similar, the quantity of gas being supplied to the unit may be adjusted to control the heat output from the heater. For example, a heating appliance may have a maximum capacity of 25MJ. Once the thermostatic or other controller suggaato that the heater should reduce its output, t,hig may be controlled through control of the quantity of gas supplied into the unit. However, as this gas supp7.y continues to reduce, SEP 26 '96 00002 006493732123 PAGE.011 ---- ~ -2 0 d YSd I 2 : i 0 9 B 19 2'6 0 ~U. VLa, 1o9U IJ.UU UnLLrtllr vvil z 4M1A4;i 2 1 865 79 itU. lU10 1 . lLrL1 -the flame height on the unit may also be effected. Once the gas consumption falls below, for example, half its maximum level, it may be decided that the flame height is now insufficient to provide a visually aesthetic appearance. In circumstances where gas qonsumption is of prime importance, such a reduction in flame height may be of no great concerz'n,. However, if the visual appearanap of the fire is considered more impoxtant, it may be deeirabla to make the unit operate less efficiently so as to inereaae the flame height.
one manner of achieving this can be by again increasing the air flow from outside of the room in which the heater is housed.
This increase of inlet air will effectively dump heated air within the room out through any available means. This dumping of heated air withizi the room allows the unit to continue to operate with a higher gaa flow and greater heat output and hence higher visible flame.
Of course, control of the unit may also alter air flow through the unit and gas consumption as other variables related to the efficiency of the heater, heat autput and flame height.
Flammaba.e fluid fuelled heaters 1 such as shown in the prevsnt invention are also often provided with an artificial log assembly within the primary combustion chamber 2 so as to give the appearance of a wood fire place. Any attempts to minimise the size of the overall heatex 7, lead to sorne compromise being made in SEP 26 '96 00:02 006493732123 PAG6.012 E 0 d wd T 2 : T 0 9 6 '9 7- 'B 0 ~.u, oct, lyyu ly.Ul DRLOr111 M a ~AKC[ 2 1 86579 NV, lUld t', IJ,11 - ~3 -the size of the fire and the artificial log assembly such as the artificial log assembly 16 compriaing artificial logs 17.
In an attempt to provide a larger visual appearance to the fire, at least one portion of the primary combuation chamber 2 may be provided with a reflective surface such as the back wall 18.
In thia preferred form of the invention, the primary combuati,on chamber 2 ie also provided with side walls 19 and 20 which are also provided as reflective surfaces to give a reflected image of the log aaaelNbly l6 and flames 21.
The problem with such reflective surfaces is often the appearance of two separate or distinet fires being the artificial log aeeeMbly 15 and flames 21 and the reflected image of both.
There is an apparent discontinuity between the two images. In the present preferred embodiment, artificial logs 17 are provided to abut the roflactive surfaces to provide an apparent continuity of the log into the reflective surface.
Refsrring'to tha rear base log 22 of the aaoembly 16, it can be seen that the upper edge 23 of this log is provided to abut the reflective back wall 18. As such the base log 22 is provided as a half round log in the artificial log assembly 16. Upon being abutted to the reflective aurface 18, the reflective surface 18 provides a continuity to this log to give the appearance of a full round log when the real and reflected images of the base log 22 are varied. The base log 22 is provided having a longitudinal axis substantially paxallal to the rear wall le.
SEF' 26 195 M02 006493732123 PA3E.813 isDa mta I 3 : I 0 9B '9Z 'Bd 6,V= ~L 1J9U LUI DnLUvIU dUN R 1dAGI 2186579 LVU, 1~j1Q t. 14/41 Similarly, additional loga 24 may be provided which abut the rear wall ie such that thQ longitudinal axis of the loga 24 is substantially transverse to the plane of the rear wa11 18, in this manner, the length of the log 24 appears to be extended in the reflective image and again providing some continuity into the reflected image.
In this preferred form where aide walls 19 and 20 are also provided with reflective surfaces, the logs abutting those surfacQa rzuch as the front log 17 abut the side wall 20 substantially perpendicular to the plane of that reflective surface to provide some continuity into the reflective surtace-In this pxefRrred form, at least a portion of the flames 21 will be provided intermediate of the loga perpendicular to the rear wall lA such as logs 24 and the side walls 19 and 20 so as not to provide a gap in the flames in the primary combustion chamber and shown in thQ reflective surface of the side walls 19 and 20.
Another feature of the artificial log assembly 16 in this preferred form is that the logs such as log 17 across the heater I
may be provided with a discontinuity such as a burnt out portion 25. Such artificial log aesemblies are often constructed from ceramic fibre logs and these may have substantial variations in shrinkage in production. Therefore, the provision of logs across the heating apparatus 1 to accurately abut against both the side wall,i 19 and 20 can be exceedingly difficult. The provision of SEP 26 186 00s02 006493732123 PRGE.014 9~p d~~ 7/~d T 2 : T 0 9 6 19 2'fi O
4V- w11, tJJV 14.V, ..if 2 18 6 5 7 9"I,U. ~u IQ ,. LJ, L , -is -the burnt out portion 16 allows the transverse log such as log 17 to be providRd with an apparent naturally occurring reason for not extending entirely acros~ the fire and creating the potential for gaps against the side walls 19 and 20 should a tight abutment against both be unable to be achieved.
The provision of the rQflected extension of tha Xoga 17,24, etc., may lead to the selection of loqs having diameters larger than chosen for a normal aaaemb7,y. The diameters are chosen in keeping with those that appear natural for a fixe a4 provided by both the real and reflective images combined and in keeping with the greater apparent length of the logs=
Thus it can be seen that at least the preferred form of thia invention provides a heating apparatus I which may provide an open front S and yet provide some inhibition to the spil],age of gases from the primary combustion chamber 2, In addition, the heater 1 providee an artificial log assembly having reflective surfaces around the perimeter of the primary combustion chamber and the artificial log assembly having logis abutting the reflective surfaces ae as to provide the appearance of continuity into the reflective surfaces.
14'here in the foregoing description reference has been made to specific components or integers of the invention having equivalents then such equivalents are herein incorporated as if individually set forth.
SEP 26 '86 00:03 006493732123 PA(iE.015 .r..~...r.-9 0 d YSd T 2 : T 0 9 6 '9 3 'B O
co, )Lr, lyyb ly Ul tiALUnIN bUIV * ti,RKrY 2186579 NU, lUf8 Y, lbill . 16 -Although this invention hes been descri.bed by way of exmmple and with reference to possible embodimenta thereof it ia to be understood thst modifications or improvements may be made thereto without departing from the scope of the invention.
26 September 1996 SEP 26 '96 00;03 006493732123 PAGE.016 LOd Y+Id T z: T O 9B 9Z BG
Claims (15)
1. A flammable fluid fueled heater comprising:
a primary combustion chamber having an opening in at least one side thereof for providing a view of a substantial portion of the primary combustion chamber;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantial portion of yellow flame, wherein upon combustion exhaust gases are generated;
a secondary combustion chamber in communication with the primary combustion chamber for receiving exhaust gases generated in the primary combustion chamber, the secondary combustion chamber comprising a catalytic converter;
an exhaust port in communication with the secondary combustion chamber for redirecting at least a portion of the exhaust gases received into the secondary combustion chamber into a room where the heater is located;
and an air circulating means for providing a stream of air across at least a portion of said opening.
a primary combustion chamber having an opening in at least one side thereof for providing a view of a substantial portion of the primary combustion chamber;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantial portion of yellow flame, wherein upon combustion exhaust gases are generated;
a secondary combustion chamber in communication with the primary combustion chamber for receiving exhaust gases generated in the primary combustion chamber, the secondary combustion chamber comprising a catalytic converter;
an exhaust port in communication with the secondary combustion chamber for redirecting at least a portion of the exhaust gases received into the secondary combustion chamber into a room where the heater is located;
and an air circulating means for providing a stream of air across at least a portion of said opening.
2. A flammable fluid fueled heater as claimed in claim 1 wherein said air circulating means comprising at least one fan.
3. A flammable fluid fueled heater as claimed in claim 1 or claim 2 wherein said stream of air is directed over a portion of said opening substantially from an upper edge of said opening.
4. A flammable fluid fueled heater as claimed in claim 1 wherein said apparatus includes a deflector coupled to the exhaust port to deflect at least a portion of said airstream into said opening and into said primary combustion chamber.
5. A flammable fluid fueled heater as claimed in claim 1 wherein said air circulating means provides a stream of air across an outlet formed between said secondary combustion chamber and said exhaust port so as to assist in the drawing of the products of combustion through said secondary combustion chamber.
6. A flammable fluid fueled heater as claimed in claim 5 further comprising a duct for receiving air from a source external to the heater and directing said air toward the exhaust ports, wherein said air circulating means draws air through said duct.
7. A flammable fluid fueled heater as claimed in claim 6 wherein said duct includes an inlet connectable to a source of air externally to the room in which the heater is housed.
8. A flammable fluid fueled heater is claimed in claim 7 wherein air drawn through said inlet connectable to a source of air external to the room in which the heater is housed is adjustable.
9. A flammable fluid fueled heater comprising:
a primary combustion chamber having an opening in at least on side thereof to provide a view of at least a substantial portion of said primary combustion chamber;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantial portion of yellow flame and generate products of combustion;
a secondary combustion chamber in communication with the primary combustion chamber for receiving products of combustion from the primary combustion chamber said secondary combustion chamber comprising a catalytic converter;
an air circulating means for assisting in the drawing of the products of combustion through said secondary combustion chamber; and an exhaust port in communication with the secondary combustion chamber for receiving the products of combustion and exhausting at least a portion of said products into a room where the heater is located.
a primary combustion chamber having an opening in at least on side thereof to provide a view of at least a substantial portion of said primary combustion chamber;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantial portion of yellow flame and generate products of combustion;
a secondary combustion chamber in communication with the primary combustion chamber for receiving products of combustion from the primary combustion chamber said secondary combustion chamber comprising a catalytic converter;
an air circulating means for assisting in the drawing of the products of combustion through said secondary combustion chamber; and an exhaust port in communication with the secondary combustion chamber for receiving the products of combustion and exhausting at least a portion of said products into a room where the heater is located.
10. A flammable fluid fueled heater as claimed in claim 9 wherein said air circulating means draws the products of combustion from said catalytic converter.
11. A flammable fluid fueled heater as claimed in claim 9 further comprising a duct receiving air from a source external to the heater, wherein said exhaust port receives air from the duct and the products of combustion, and wherein said air circulating means further draws air from said duct.
12. A flammable fluid fueled heater as claimed in claim 11 further comprising means for adjusting the volume of air being received by said duct.
13. A flammable fluid fueled heater as claimed in claims 9, 10, 11 or 12 wherein said air circulating means additionally provides a stream of air across at least a portion of said opening.
14. A flammable fluid fueled heater as claimed in claims 9, 10, 11 or 12 wherein said air circulating means comprises at least one fan.
15. A flammable fluid fueled heater comprising:
a housing having an opening;
a primary combustion chamber within the housing, the primary combustion chamber having an opening in at least one side thereof aligned with the housing opening providing a view of the combustion chamber from a location external to the housing;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantially yellow flame;
a secondary combustion chamber comprising, an intake in communication with the primary combustion chamber for receiving products of combustion from the primary combustion chamber, a catalytic converter, and an exhaust for exhausting the products of combustion;
a duct between the housing and the primary combustion chamber for receiving air from a source external to the heater, the duct providing a flow of air over the exhaust; and an air circulating means for increasing the circulation of air through said duct for creating an air stream across the secondary combustion chamber exhaust for increasing the throughput through the catalytic converter.
a housing having an opening;
a primary combustion chamber within the housing, the primary combustion chamber having an opening in at least one side thereof aligned with the housing opening providing a view of the combustion chamber from a location external to the housing;
a flammable fluid fuel supply to said primary combustion chamber to, upon combustion, provide a substantially yellow flame;
a secondary combustion chamber comprising, an intake in communication with the primary combustion chamber for receiving products of combustion from the primary combustion chamber, a catalytic converter, and an exhaust for exhausting the products of combustion;
a duct between the housing and the primary combustion chamber for receiving air from a source external to the heater, the duct providing a flow of air over the exhaust; and an air circulating means for increasing the circulation of air through said duct for creating an air stream across the secondary combustion chamber exhaust for increasing the throughput through the catalytic converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002542402A CA2542402C (en) | 1995-09-26 | 1996-09-26 | Flammable fluid heating apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NZ280094 | 1995-09-26 | ||
| NZ28009495 | 1995-09-26 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002542402A Division CA2542402C (en) | 1995-09-26 | 1996-09-26 | Flammable fluid heating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2186579A1 CA2186579A1 (en) | 1997-03-27 |
| CA2186579C true CA2186579C (en) | 2008-02-19 |
Family
ID=19925483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002186579A Expired - Fee Related CA2186579C (en) | 1995-09-26 | 1996-09-26 | Flammable fluid heating apparatus |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0766046B1 (en) |
| AT (1) | ATE280930T1 (en) |
| AU (1) | AU701159B2 (en) |
| CA (1) | CA2186579C (en) |
| DE (1) | DE69633704T2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1294552B1 (en) * | 1997-07-07 | 1999-04-12 | Worgas Bruciatori Srl | METHOD FOR REDUCING CO AND NO2 EMISSIONS IN HEATING APPLIANCES, AND RELATED APPLIANCES. |
| CH696708A5 (en) | 2002-02-15 | 2007-10-15 | Niklaus Luethi | A process for separating a hearth from the environment through an air curtain and device for carrying out the process. |
| GB2410324B (en) * | 2004-01-21 | 2009-02-18 | Valor Ltd | Heating apparatus |
| CN105823104A (en) * | 2016-05-05 | 2016-08-03 | 中山七灵电器科技有限公司 | Structure-improved range hood |
| CN112902237B (en) * | 2021-01-26 | 2022-03-08 | 宁波方太厨具有限公司 | Protection device of cooker camera, control method of protection device and cooker system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2632056A1 (en) * | 1976-07-16 | 1978-01-26 | Siegfried Dipl Kfm Ing Gr Vinz | Living room fireplace with circulating air curtain - has gap over front of fire and air entry at bottom rear |
| GB2207235A (en) * | 1987-07-22 | 1989-01-25 | Kevin Francis Sharratt | Simulated solid fuel gas fires |
| NL8901777A (en) * | 1989-07-11 | 1991-02-01 | Helex B V | Gas fired open hearth units - have common exhaust gas chimney for multi-storey building |
| NL9001777A (en) * | 1990-08-06 | 1992-03-02 | Texas Instruments Holland | Transponder with glass housing - is enclosed by flexible cladding |
| NZ245975A (en) * | 1993-02-23 | 1997-05-26 | John Stuart Fleming | Heating apparatus with catalytic converter in secondary combustion chamber and typically for visible flame gas heater |
-
1996
- 1996-09-26 AT AT96307034T patent/ATE280930T1/en not_active IP Right Cessation
- 1996-09-26 DE DE69633704T patent/DE69633704T2/en not_active Expired - Lifetime
- 1996-09-26 AU AU65884/96A patent/AU701159B2/en not_active Ceased
- 1996-09-26 EP EP96307034A patent/EP0766046B1/en not_active Expired - Lifetime
- 1996-09-26 CA CA002186579A patent/CA2186579C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0766046A3 (en) | 1998-04-15 |
| DE69633704T2 (en) | 2005-03-10 |
| EP0766046A2 (en) | 1997-04-02 |
| DE69633704D1 (en) | 2004-12-02 |
| ATE280930T1 (en) | 2004-11-15 |
| AU701159B2 (en) | 1999-01-21 |
| EP0766046B1 (en) | 2004-10-27 |
| AU6588496A (en) | 1997-04-10 |
| CA2186579A1 (en) | 1997-03-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20150928 |