Burner control system
First Claim
1. A burner control system for heating, ventilating and air condition (HVAC) comprising:
- a combustion chamber;
an air channel having an output coupled to the combustion chamber;
a fuel channel having an output coupled to the combustion chamber;
a bypass channel having a first end connected to one or more of the air channel and the fuel channel and a second end coupled to the combustion chamber;
an air mover coupled to the air channel;
a fuel valve coupled to an input of the fuel channel;
a first sensor configured to sense a measure in the air channel;
a second sensor configured to sense a measure in the fuel channel;
a third sensor configured to sense a measure in the combustion chamber;
a forth sensor having a port connected to the bypass channel;
a controller connected to the first sensor, the second sensor, the third sensor, and the fourth sensor;
wherein the controller receives a signal from each of the first sensor, the second sensor, the third sensor, and the fourth sensor indicating a magnitude of a parameter sensed by the respective sensor; and
wherein the controller sends a signal to a control mechanism to adjust an amount of fuel provided to the fuel channel and/or to adjust an amount of air provided to the air channel based, at least in part, on the signal from the fourth sensor, so as to cause the parameter to approach a predetermined magnitude for achieving a certain fuel to air ratio of a fuel air mixture in the combustion chamber.
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Accused Products
Abstract
A burner control system for improving burner performance and efficiency. The system may determine fuel and air channel or manifold parameters. Determination of parameters may be performed with a sensor connected across the air and fuel channels. A signal from the sensor may control the parameters which in turn affect the amounts of fuel and air to the burner via a controller. Parameter control of the fuel and air in their respective channels may result in more accurate fuel and air ratio control. One or more flow restrictors in fuel and/or air bypass channels may further improve accuracy of the fuel and air ratio. The channels may be interconnected with a pressure or flow divider. Byproducts of combustion in the exhaust, temperatures of gas and air, flame quality and/or other items may be monitored and adjusted with control of the fuel and air ratio for optimum combustion in the burner.
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Citations
18 Claims
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1. A burner control system for heating, ventilating and air condition (HVAC) comprising:
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a combustion chamber; an air channel having an output coupled to the combustion chamber; a fuel channel having an output coupled to the combustion chamber; a bypass channel having a first end connected to one or more of the air channel and the fuel channel and a second end coupled to the combustion chamber; an air mover coupled to the air channel; a fuel valve coupled to an input of the fuel channel; a first sensor configured to sense a measure in the air channel; a second sensor configured to sense a measure in the fuel channel; a third sensor configured to sense a measure in the combustion chamber; a forth sensor having a port connected to the bypass channel; a controller connected to the first sensor, the second sensor, the third sensor, and the fourth sensor; wherein the controller receives a signal from each of the first sensor, the second sensor, the third sensor, and the fourth sensor indicating a magnitude of a parameter sensed by the respective sensor; and wherein the controller sends a signal to a control mechanism to adjust an amount of fuel provided to the fuel channel and/or to adjust an amount of air provided to the air channel based, at least in part, on the signal from the fourth sensor, so as to cause the parameter to approach a predetermined magnitude for achieving a certain fuel to air ratio of a fuel air mixture in the combustion chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A burner control system comprising:
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a chamber; an air channel having an output coupled to the chamber; a fuel channel having an output coupled to the chamber; a bypass channel having a first end coupled to the fuel channel and having a second end coupled to the chamber; an air mover coupled to the air channel; a fuel valve coupled to an input of the fuel channel; a first sensor configured to sense a measure in the air channel upstream of an end of the air channel adjacent the chamber and downstream of the air mover; a second sensor configured to sense a measure in the fuel channel upstream of an end of the fuel channel adjacent the chamber and downstream of the fuel valve; a third sensor having a first port coupled to the air channel and having a second port coupled to the bypass channel; and a controller connected to the first sensor, the second sensor, the third sensor, and one or more of the air mover and the fuel valve. - View Dependent Claims (13, 14, 15, 16)
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17. A method of controlling an air to fuel ratio provided to a combustion chamber, the method comprising:
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sensing a measure in an air flow channel with a first sensor, wherein the measure is sensed at a position downstream of an air flow mover coupled to the air flow channel and upstream of an output of the air flow channel into a combustion chamber; sensing a measure in a fuel channel with a second sensor, wherein the measure is sensed at a position downstream of a fuel valve coupled to the fuel channel and upstream of an output of the fuel channel into the combustion chamber; sensing a measure in a bypass channel with a third sensor between a first port coupled to the air channel and a second port coupled to the bypass channel, wherein the bypass channel has a first end coupled to the fuel channel, and having a second end coupled to the chamber; and adjusting with a controller connected to the first sensor, the second sensor and the third sensor one or more of the air flow mover to adjust an amount of air provided to the combustion chamber and the fuel valve to adjust an amount of fuel provided to the combustion chamber. - View Dependent Claims (18)
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Specification