Regulating device for gas burners
AssigneeHoneywell International Inc.
InventorEnno Vrolijk
Life of this patent
Estimating the term…
Abstract
The invention relates to a control means for gas burners. Control means for gas burners are used for supplying a gas flow and a combustion air flow to a burner. In this procedure, the gas flow is adjustable in dependence on the combustion air pressure. In the case of known control means, pressure measurement is effected by means of a diaphragm, i.e. pneumatically. This pneumatic pressure measurement restricts the scope of application of known control means. In the case of the control means according to the invention, there is provided a sensor (16) which generates an electric or electronic signal 19 which is used for adjusting the gas valve 11 (FIG. 1).
Claims24
A control means for a gas burner system, the gas burner system including a first line through which a gas stream flows from a gas valve to a gas nozzle, and a second line through which a fan forces a combustion air stream, the gas nozzle opening into the second line downstream from a throttle point, the control means comprising, in combination:
- a measuring point on the first line, the measuring point positioned upstream from the gas nozzle;
- a sensor coupled to the measuring point and to a reference point for providing the sensor with a reference pressure, the sensor generating a signal indicating a pressure differential;
- and
- a control unit to provide a control signal to an actuator for controlling the gas valve.
A control means for a gas burner system, the gas burner system including a first line through which a gas stream flows from a gas valve to a gas nozzle, and a second line through which a fan forces a combustion air stream, the gas nozzle opening into the second line downstream from a throttle point, the control means comprising, in combination:
- an evaluation means for generating an auxiliary signal, the auxiliary signal based on a detected auxiliary parameter;
- a sensor coupled to a measuring point on the first line and providing a signal indicating a differential pressure between the measuring point and a reference point;
- a summing means for balancing the signal of the sensor with the auxiliary signal to generate an output signal;
- and
- an actuator operative to receive the output signal and to control the gas valve based on the output signal.
A method for controlling a gas-air mixture to a gas burner system, the gas burner system including a first line through which a gas stream flows from a gas valve to a gas nozzle, and a second line through which a fan forces a combustion air stream, the gas nozzle opening into the second line downstream from a throttle point, comprising in combination:
- providing a signal indicating a differential pressure between a first line and a reference point;
- and
- controlling an actuating drive based on the signal, thereby controlling the gas valve.
A method for controlling a gas-air mixture to a gas burner system, the gas burner system including a first line through which a gas stream flows from a gas valve to a gas nozzle, and a second line through which a fan forces a combustion air stream, the gas nozzle opening into the second line downstream from a throttle point, comprising in combination:
- providing an auxiliary signal based on detecting an auxiliary parameter;
- providing a signal indicating a differential pressure between the first line and a reference point;
- balancing the auxiliary signal with the signal indicating the differential pressure to provide an output signal;
- and
- controlling an actuating drive based on the output signal, thereby controlling the gas valve.
Dependencies are inferred from the claim text.