Pilot pressure switch and method for controlling the operation of a furnace
First Claim
Patent Images
1. A pilot pressure switch for a furnace having a continuously burning pilot flame in fluid communication with a furnace gas valve by a pilot line disposed between the pilot flame and the gas valve, the furnace also including a thermostat and a blower control with at least one wire disposed between the thermostat and the blower control, comprising:
- a means for detecting the fluid pressure within the pilot line, the fluid pressure detecting means being disposed in fluid communication with the pilot line; and
a means for controlling the passage of an electrical signal through the at least one wire in response to the fluid pressure detected in the pilot line, whereby if the fluid pressure detected in the pilot line exceeds a predetermined fluid pressure, the electrical signal from the thermostat passes through the at least one wire to the blower control.
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Accused Products
Abstract
A pilot pressure switch for a furnace detects the fluid pressure within the pilot line for a pilot flame, and upon the fluid pressure in the pilot line exceeding a predetermined value, an electrical signal from a thermostat may be passed to a furnace blower control to operate the furnace main blower and furnace vent blower.
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Citations
9 Claims
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1. A pilot pressure switch for a furnace having a continuously burning pilot flame in fluid communication with a furnace gas valve by a pilot line disposed between the pilot flame and the gas valve, the furnace also including a thermostat and a blower control with at least one wire disposed between the thermostat and the blower control, comprising:
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a means for detecting the fluid pressure within the pilot line, the fluid pressure detecting means being disposed in fluid communication with the pilot line; and a means for controlling the passage of an electrical signal through the at least one wire in response to the fluid pressure detected in the pilot line, whereby if the fluid pressure detected in the pilot line exceeds a predetermined fluid pressure, the electrical signal from the thermostat passes through the at least one wire to the blower control. - View Dependent Claims (2, 3, 4)
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5. A method for controlling the operation of a furnace having a continuously burning pilot flame in fluid communication with a furnace gas valve by a pilot line disposed between the pilot flame and the gas valve, the furnace also including a thermostat and a blower control with at least one wire disposed between the thermostat and the blower control, comprising the steps of:
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detecting the fluid pressure within the pilot line; controlling the passage of an electrical signal through the at least one wire in response to the fluid pressure in the pilot line; and permitting the electrical signal to pass through the at least one wire from the thermostat to the blower control when the fluid pressure detected in the pilot line exceeds a predetermined fluid pressure. - View Dependent Claims (6, 7, 8, 9)
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Specification