GB1480659A - Circuit for a flame control device of a furnace - Google Patents
Circuit for a flame control device of a furnaceInfo
- Publication number
- GB1480659A GB1480659A GB41418/75A GB4141875A GB1480659A GB 1480659 A GB1480659 A GB 1480659A GB 41418/75 A GB41418/75 A GB 41418/75A GB 4141875 A GB4141875 A GB 4141875A GB 1480659 A GB1480659 A GB 1480659A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- voltage
- flame
- switches
- ignition
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
- F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
- F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/04—Prepurge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2229/00—Flame sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Regulation And Control Of Combustion (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
1480659 Burner controls DANFOSS AS 9 Oct 1975 [9 Oct 1974] 41418/75 Heading F4T An electric circuit for a furnace flame control device comprises a photo resistance LD forming part of a voltage divider which consists of ohmic resistances R 5 , R 6 , and a tapping 6 for controlling an amplifier, i.e. transistors Tr 1 , Tr 2 , which controls a photo-relay including an electromagnetic coil F, which in turn controls switches F 1 , F 2 , the divider lying in parallel with a first storage condenser C 1 , chargeable to a predetermined low D.C. voltage through a rectifier D 1 , and a second storage condenser C 3 , chargeable through at least one sensitivity control terminal A or B that can be connected to receive the A.C. voltage by means of snapaction switch P 1 or P 2 , the second condenser being disposed in a branch circuit which is connected between a point of fixed voltage and a tapping 8 of the voltage divider. In operation, with switches P 1 , F 1 , on rest contacts a, boiler thermostat KT is closed, fan motor M is started, ignition transformer TT and heating coil P of a time relay are energized, terminal A is supplied with mains voltage and this provides for a preignition period during which ventilation of the combustion chamber and a check on a false light takes place. At the end of this period time relay switch P 1 moves to b, magnetic valve MV 1 is opened and oil flows to the pilot burner. Mains voltage is also supplied to terminal B through snap-action switches P 1 , P 2 , and F 2 , so that flame monitor FW becomes less sensitive than normal and will not respond even if a flame is formed at the pilot. At the end of pre-ignition, switch 2 opens, FW becomes more sensitive due to absence of voltage at B and snap-action switches F 1 , F 2 , move to operating contacts b and a mechanical lock FL locks switch P 1 in its operating position; heating coil P and ignition transformer TT are disconnected from supply 3 and a magnetic valve MV 2 is switched-on after cooling of the time relay and return of switch P 2 to its rest position, so that main oil flow commences. Normal operation is interrupted, e.g. when mains voltage fails, by opening boiler thermostat KT, and if the supply voltage fails magnetic valves MV 1 , MV 2 , close to shut off the oil supply and motor MV stops, the photo relay drops off, switches F 1 , F 2 , return to their illustrated positions and lock Fk is released. If no flame occurs during switch on, heating coil P on the time relay remains connected to supply through switch F 1 , until a manually reset safety switch P 3 responds and a fault is indicated at lamp L. After valves MV 1 , MV 2 , are switched off when the flame disappears, a renewed ignition attempt will determine whether the flame is extinguished permanently. If photo resistance LD is subjected to false light, switch F 1 , moves to b and is locked by FL. Coil P continues to be heated and after a safety period switching off is by switch P 3 . Fuel feed may be by valve MV 1 , and a post ignition period may be omitted, so that components P 2 , F 2 , MV 2 , D 5 , and R 7 , are not required. Rectifier D 2 may be dispensed with and the magnetic valves may be replaced by pumps or relays.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2448098A DE2448098C2 (en) | 1974-10-09 | 1974-10-09 | Circuit supplied with alternating voltage for a flame monitor in a combustion system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1480659A true GB1480659A (en) | 1977-07-20 |
Family
ID=5927883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB41418/75A Expired GB1480659A (en) | 1974-10-09 | 1975-10-09 | Circuit for a flame control device of a furnace |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5164641A (en) |
CH (1) | CH597560A5 (en) |
DE (1) | DE2448098C2 (en) |
DK (1) | DK369275A (en) |
FR (1) | FR2287657A1 (en) |
GB (1) | GB1480659A (en) |
IT (1) | IT1047391B (en) |
NL (1) | NL7511816A (en) |
NO (1) | NO140440C (en) |
SE (1) | SE413694B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2852670A1 (en) * | 2003-03-19 | 2004-09-24 | Danfoss As | Oil burner igniting process for heating fixture, involves activating ignition device on one segment of inflammation period, with lower electric power than on other segment of inflammation period |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2557691A1 (en) * | 1975-12-20 | 1977-06-30 | Danfoss As | CONTROL AND MONITORING DEVICE FOR AN OIL OR GAS BURNER |
JPS5351633U (en) * | 1976-10-05 | 1978-05-02 |
-
1974
- 1974-10-09 DE DE2448098A patent/DE2448098C2/en not_active Expired
-
1975
- 1975-08-15 DK DK369275A patent/DK369275A/en unknown
- 1975-09-16 CH CH1200875A patent/CH597560A5/xx not_active IP Right Cessation
- 1975-10-07 NO NO753388A patent/NO140440C/en unknown
- 1975-10-07 JP JP50121213A patent/JPS5164641A/en active Granted
- 1975-10-08 NL NL7511816A patent/NL7511816A/en not_active Application Discontinuation
- 1975-10-08 IT IT69502/75A patent/IT1047391B/en active
- 1975-10-08 SE SE7511267A patent/SE413694B/en unknown
- 1975-10-09 FR FR7530950A patent/FR2287657A1/en active Granted
- 1975-10-09 GB GB41418/75A patent/GB1480659A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2852670A1 (en) * | 2003-03-19 | 2004-09-24 | Danfoss As | Oil burner igniting process for heating fixture, involves activating ignition device on one segment of inflammation period, with lower electric power than on other segment of inflammation period |
Also Published As
Publication number | Publication date |
---|---|
NO140440B (en) | 1979-05-21 |
DK369275A (en) | 1976-04-10 |
JPS5164641A (en) | 1976-06-04 |
SE413694B (en) | 1980-06-16 |
NO140440C (en) | 1979-08-29 |
CH597560A5 (en) | 1978-04-14 |
SE7511267L (en) | 1976-04-12 |
NO753388L (en) | 1976-04-12 |
DE2448098B1 (en) | 1976-03-25 |
FR2287657A1 (en) | 1976-05-07 |
NL7511816A (en) | 1976-04-13 |
IT1047391B (en) | 1980-09-10 |
DE2448098C2 (en) | 1980-07-03 |
FR2287657B1 (en) | 1979-06-29 |
JPS5720525B2 (en) | 1982-04-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |