Boiler control unit
First Claim
1. Boiler control unit for controlling a heating device in a boiler, comprising a delayed cycle controller for activating and deactivating said heating devices, wherein said delayed cycle controller is operated by a thermal relay, providing a temperature responsive signal which is switched on when the temperature in the boiler underpasses a lower temperature level and switched off when the temperature in the boiler exceeds a higher temperature level, and wherein said delayed cycle controllers is arranged to determine the cooling time (□
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1) of the boiler by measuring the time elapsing between the on-to-off transition (□
1) and the off-to-on transition (□
2) of the signal provided by the thermal relay, to determine a delay as a certain percentage of said cooling time (□
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□
1), to deactivate the heating device essentially at the point of time when the thermal relay signal is switched off, and to activate the heating device at a point of time (□
3) given by said delay after the off-to-on transition (□
2) of the signal provided by the thermal relay, said boiler control unit further comprising an input of a signal from a temperature sensor which is arranged to measure the boiler outlet temperature, said percentages being dynamically variable, dependent on the signal from said temperature sensor.
1 Assignment
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Accused Products
Abstract
The invention relates to a boiler control unit (20) for controlling a burner (2) in a heating boiler (1) controlled by a thermal relay (6). The control unit (20) includes a delayed cycle controller (21) which overrides the thermal relay (6) control and thus delays the activating of the boiler. The delay is dynamically alterable by the controller, based on changes in the temperature of the boiler outlet temperature.
10 Citations
20 Claims
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1. Boiler control unit for controlling a heating device in a boiler, comprising a delayed cycle controller for activating and deactivating said heating devices, wherein
said delayed cycle controller is operated by a thermal relay, providing a temperature responsive signal which is switched on when the temperature in the boiler underpasses a lower temperature level and switched off when the temperature in the boiler exceeds a higher temperature level, and wherein said delayed cycle controllers is arranged to determine the cooling time (□ -
2−
□
1) of the boiler by measuring the time elapsing between the on-to-off transition (□
1) and the off-to-on transition (□
2) of the signal provided by the thermal relay,to determine a delay as a certain percentage of said cooling time (□
2−
□
1),to deactivate the heating device essentially at the point of time when the thermal relay signal is switched off, and to activate the heating device at a point of time (□
3) given by said delay after the off-to-on transition (□
2) of the signal provided by the thermal relay,said boiler control unit further comprising an input of a signal from a temperature sensor which is arranged to measure the boiler outlet temperature, said percentages being dynamically variable, dependent on the signal from said temperature sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification