EP0073717B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Tight forced-draught burner with microprocessor regulation
Assignee: Saunier Duval Eau Chaude Chauffage SDECC SA
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Filing: 1982-08-26
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Granted: 1986-06-11
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Expires: 2002-08-26
Abstract
Abstract The invention concerns a control device for gas boilers. The overall functions involving control and safety are ensured by a control box (26) with microprocessor which centralizes data collected from the ambient thermostat (27), the temperature sensor (28) on the duct (21) for heating water return, the air output sensor (19), the drawing contact (31), the extraction fan (6) speed sensor (30), and the lighter (24), and it converts them into digital signals that are made to operate the lighter, the circulation pump (19), the gas inlet electrovalve (12) and the extraction fan according to the control data that the microprocessor has memorized. Application for forced draft steamtight gas boilers.
Inventors
- 👤 Franck Boulle
- 👤 Michel Zveguintzoff
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 10:40
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/06; F23N1/062; F23N1/08; F23N1/10; F23N1/102; F23N5/00; F23N5/18; F23N2005/181; F23N2223/00; F23N2223/06; F23N2223/08; F23N2225/00; F23N2225/08; F23N2225/14; F23N2225/19; F23N2227/00; F23N2227/06; F23N2227/12; F23N2227/20; F23N2227/28; F23N2233/00; F23N2233/02; F23N2233/04; F23N2235/00; F23N2235/12; F23N2235/14; F23N2239/00; F23N2239/04; F23N2241/00; F23N2241/06; F23N3/00; F23N3/08; F23N3/082
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
380 words
1) A regulating device for a gas fuelled single or mixed forced draught boiler wherein a leakproof casing contains: - a burner (5); - a heating unit (3); - a hood for the evacuation of the exhaust gases (2); - an extractor fan (6); and wherein the fresh air necessary for the combustion of the burner is admitted from an air distributor box (11) disposed in the upper portion of the said casing, the said boiler comprising: - an electrovalve (12) for the admission of the gas to the burner connected to a circuit breaker box (14); - a selector valve (15) directing the primary water either towards a long circuit during the heating operation or towards a short circuit during water take-up; - a circulating pump (19); - an igniter (24); - as well as a plurality of sensors or of detectors intended to pick up the data relating to temperature, flow or operation. A boiler wherein the whole of the functions of regulation, of safety and of continuous control of the air flow according to the gas flow is ensured by a microprocessor control box (26) - which centralises the data received from the various sensors; - which converts them into digital signals which are capable of actutating the operation of the igniter (24), of the circulating pump (19), the electrovalve for the gas admission (12) and of the extractor fan (6) according to the preprogrammed control data memorised by the microprocessor characterised in that the microprocessor control box (26) is connected to at least two temperature sensors, the one being constituted by an ambient temperature thermostat (27) and the other sensor (28) being located on the return pipe (21) for the heating water, which is also connected to an airflow sensor (29) mounted on the air passage opening (11) of the air distributor casing (10) which is also connected to a sensor for the speed of rotation (30) mounted on the motor (7) of the extractor fan (6) and which is finally connected to contactors providing a first input regarding the take-up of sanitary water thanks to a take-up contact (31) disposed at the level of the selector valve (15) and a second input regarding the ignition cycle by means of a contact on the igniter (24);
Claim 2
Dependent Claim
380 words
1) A regulating device for a gas fuelled single or mixed forced draught boiler wherein a leakproof casing contains: - a burner (5); - a heating unit (3); - a hood for the evacuation of the exhaust gases (2); - an extractor fan (6); and wherein the fresh air necessary for the combustion of the burner is admitted from an air distributor box (11) disposed in the upper portion of the said casing, the said boiler comprising: - an electrovalve (12) for the admission of the gas to the burner connected to a circuit breaker box (14); - a selector valve (15) directing the primary water either towards a long circuit during the heating operation or towards a short circuit during water take-up; - a circulating pump (19); - an igniter (24); - as well as a plurality of sensors or of detectors intended to pick up the data relating to temperature, flow or operation. A boiler wherein the whole of the functions of regulation, of safety and of continuous control of the air flow according to the gas flow is ensured by a microprocessor control box (26) - which centralises the data received from the various sensors; - which converts them into digital signals which are capable of actutating the operation of the igniter (24), of the circulating pump (19), the electrovalve for the gas admission (12) and of the extractor fan (6) according to the preprogrammed control data memorised by the microprocessor characterised in that the microprocessor control box (26) is connected to at least two temperature sensors, the one being constituted by an ambient temperature thermostat (27) and the other sensor (28) being located on the return pipe (21) for the heating water, which is also connected to an airflow sensor (29) mounted on the air passage opening (11) of the air distributor casing (10) which is also connected to a sensor for the speed of rotation (30) mounted on the motor (7) of the extractor fan (6) and which is finally connected to contactors providing a first input regarding the take-up of sanitary water thanks to a take-up contact (31) disposed at the level of the selector valve (15) and a second input regarding the ignition cycle by means of a contact on the igniter (24);
Claim 3
Dependent Claim
374 words
2) A control method for a gas fuelled single or mixed forced draught boiler wherein a leakprppf casing contains - a burner (5); - a heating unit (3) - a hood for the evacuation of the exhaust gases (2) - an extractor fan (6); and wherein the fresh air necessary for the combustion of the burner is admitted from an air distributor box (10) disposed in the upper portion of the said casing the said boiler comprising: - an electrovalve (12) for the admission of the gas to the burner connected to a circuit breaker box (14); - a selector valve (15) directing the primary water either towards a long circuit during the heating operation, or towards a short circuit during water take-up; - a circulating pump (19); - an igniter (24); - as well as a plurality of sensors or of detectors intended to pick up the data relating to temperature, flow or operation. a boiler wherein the whole of the functions of regulation, safety and of continuous control of the air flow according to the gas flow is ensured by a microprocessor control box (26), - which centralises the data received from the various sensors; - which converts them into digital signals capable of actuating the operation of the igniter (24), the circulating pump (19), the electrovalve for the gas admission (12) and of the extractor fan (6) according to the pre-programmed control data memorised by the microprocessor, characterised in that the insertion of the control inputs into the microprocessor is ensured when the apparatus is energised by causing the extractor fan (6) to operate at its maximum speed and by an input into memory of the value of the air delivery corresponding to the full delivery registered by sensor (29), followed by causing the said fan to operate at the reduced speed corresponding to the air delivery necessary for the functioning of the burner at its minimum power of the planned control range and by inputting the value of this reduced air delivery into memory, and in that the microprocessor periodically reads the temperature data provided by the environment thermostat (27) and of the water take-up provided by the contact (31) at a reading frequency comprised between 0.2 and 0.5 seconds.
Claim 4
Dependent Claim
374 words
2) A control method for a gas fuelled single or mixed forced draught boiler wherein a leakprppf casing contains - a burner (5); - a heating unit (3) - a hood for the evacuation of the exhaust gases (2) - an extractor fan (6); and wherein the fresh air necessary for the combustion of the burner is admitted from an air distributor box (10) disposed in the upper portion of the said casing the said boiler comprising: - an electrovalve (12) for the admission of the gas to the burner connected to a circuit breaker box (14); - a selector valve (15) directing the primary water either towards a long circuit during the heating operation, or towards a short circuit during water take-up; - a circulating pump (19); - an igniter (24); - as well as a plurality of sensors or of detectors intended to pick up the data relating to temperature, flow or operation. a boiler wherein the whole of the functions of regulation, safety and of continuous control of the air flow according to the gas flow is ensured by a microprocessor control box (26), - which centralises the data received from the various sensors; - which converts them into digital signals capable of actuating the operation of the igniter (24), the circulating pump (19), the electrovalve for the gas admission (12) and of the extractor fan (6) according to the pre-programmed control data memorised by the microprocessor, characterised in that the insertion of the control inputs into the microprocessor is ensured when the apparatus is energised by causing the extractor fan (6) to operate at its maximum speed and by an input into memory of the value of the air delivery corresponding to the full delivery registered by sensor (29), followed by causing the said fan to operate at the reduced speed corresponding to the air delivery necessary for the functioning of the burner at its minimum power of the planned control range and by inputting the value of this reduced air delivery into memory, and in that the microprocessor periodically reads the temperature data provided by the environment thermostat (27) and of the water take-up provided by the contact (31) at a reading frequency comprised between 0.2 and 0.5 seconds.
Claim 5
Dependent Claim
49 words
3) A control method according to Claim 2, characterised in that in the absence of any command, the circulating pump (19) remains in the off position and the extractor fan (6) only opcrates very intermittently and at a reduced speed to ensure the air supply of the pilot burner.
Claim 6
Dependent Claim
73 words
4) A control method according to Claim 2, characterised in that the microprocessor commands the opening of the electrovalve (12) and the speed of the extractor fan (6) in a controlled manner when a requirement of calories is detected by the environment thermostat (27) to ensure that the air/gas mixture ratio remains constant and to keep the temperature of the heating water returning via pipe (20) at the temperature which has been pre-set.
Claim 7
Dependent Claim
76 words
5) A control method according to Claim 2, characterised in that the micrprocessor actuates the reversal of the selector valve (15) which then directs the water of the primary circuit (16, 21) into the short circuit when a take up of sanitary water is detected by the water takeup contact (31), and adjusts the temperature of this water to a fixed pre-set value allowing a satisfactory temperature to be obtained on the secondary water take-up circuit.
Claim 8
Dependent Claim
35 words
6) A control method according to Claims 4 and 5, characterised in that in the case of a shut down of burner (5) the microprocessor delays its reignition to avoid repeated ignition and extinction cycles.
Claim 9
Dependent Claim
39 words
7) A control method according to Claims 4 and 5, characterised in that the microprocessor causes the circulating pump (19) and the extractor fan (6) to remain in operation for some time after the burner has been shut down.
Claim 10
Dependent Claim
32 words
8) A control method according to Claim 7, characterised in that the microprocessor only ensures the reignition of the burner after a low delivery stage in order to ensure a silent ignition.
Claim 11
Dependent Claim
42 words
9) A control method according to Claim 2, characterised in that a simulation of the commands sent to the peripheral units according to the data supplied at the inputs is applied to the microprocessor control unit (26) to test its proper functioning.
References Cited (Backward Citations)
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