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US 5,807,098 AGranted
Gas heater with alarm system
AssigneeDESA International, Inc.
InventorDavid Deng
Life of this patent
Estimating the term…
Abstract
A heater including a housing, a heating assembly having a burner, and at least one of an oxygen level detection assembly adapted to distinguish between a relatively normal oxygen level, a relatively low oxygen level and relatively unsafe oxygen, a carbon monoxide sensor and a combustible gas sensor. The heater may also include an indicator adapted to produce at least one of an audible indication and a visible indication in response to a detection of a relatively low oxygen level, a detection of a predetermined level of carbon monoxide, or a detection of combustible gas.
Claims29
A heater for use in an environment containing air, the air defining an oxygen content, the heater comprising:
- a housing defining an interior and an exterior;
- a heating assembly adapted to receive fuel from a fuel source and including at least one burner adapted to burn the fuel and a pilot adapted to produce a pilot flame movable between three spaced predetermined locations which correspond to the oxygen level in the environment in which the heater is used;
- an oxygen level detection assembly adapted to distinguish between at least three predetermined oxygen levels of the air in the environment in which the heater is used by determining which one of the three predetermined locations that the pilot flame is located in, the first oxygen level corresponding to a relatively normal oxygen content, the second oxygen level corresponding to a relatively low oxygen content and the third oxygen level corresponding to a relatively unsafe oxygen content;
- a carbon monoxide sensor adapted to determine the level of carbon monoxide in the air in the environment in which the heater is used;
- a combustible gas sensor adapted to detect the presence of combustible gas in the air in the environment in which the heater is used;
- and
- an indicator adapted to produce at least one of an audible indication and a visible indication in response to at least one of a detection of the second oxygen level by the oxygen level detection assembly, a detection of a predetermined level of carbon monoxide by the carbon monoxide sensor, and a detection of combustible gas by the combustible gas sensor.
4 more elements
A heater, comprising:
- a pilot having a nozzle;
- an ignitor having an ignition electrode located in spaced relation to the nozzle;
- a first temperature sensitive flame detector positioned in a first predetermined location in spaced relation to the pilot and ignitor;
- and
- a second temperature sensitive flame detector positioned in a second predetermined location in spaced relation to the pilot and ignitor.
2 more elements
A heater, comprising:
- a pilot having a nozzle;
- an ignitor having an ignition electrode located in spaced relation to the nozzle;
- a first flame detector positioned substantially between the pilot and the ignitor and facing a first side of the ignition electrode;
- and
- a second flame detector positioned in a second predetermined location in spaced relation to the pilot and ignitor and associated with a second side of the ignition electrode.
2 more elements
A heater, comprising:
- a pilot having a nozzle;
- an ignitor having an ignition electrode located in spaced relation to the nozzle;
- a first flame detector positioned in a first predetermined location in spaced relation to the pilot and ignitor;
- and
- a second flame detector positioned in a second predetermined location in spaced relation to the pilot and ignitor;
- wherein the nozzle, ignition electrode, first flame detector, and second flame detector are respectively located such that a flame produced by the pilot will remain in a substantially fixed position, for a predetermined period of time, in response to an oxygen level substantially equal to approximately between 19.2% and 19.0%, the substantially fixed position being one in which the first flame detector will not detect a flame and the second flame detector will detect a flame.
3 more elements
A heater for use in an environment containing air, the heater comprising:
- a housing defining an interior and an exterior, the interior of the housing defining an upper portion, a lower portion substantially separated from the upper portion, at least one air outlet associated with the upper portion and at least one air inlet associated with the lower portion;
- a heating assembly located within the upper portion of the interior and adapted to receive fuel from a fuel source and including at least one burner adapted to burn the fuel;
- a carbon monoxide sensor located substantially within the lower portion of the interior and adapted to determine the level of carbon monoxide in the air in the environment in which the heater is used;
- and
- an indicator operably connected to the carbon monoxide sensor, the indicator being adapted to produce at least one of an audible indication and a visible indication in response to a detection of a predetermined level of carbon monoxide by the carbon monoxide sensor.
2 more elements
A heater for use in an environment containing air, the heater comprising:
- a housing defining an interior and an exterior, the interior of the housing defining an upper portion, a lower portion substantially separated from the upper portion, at least one air outlet associated with the upper portion and at least one air inlet associated with the lower portion;
- a heating assembly located within the upper portion of the interior and adapted to receive fuel from a fuel source and including at least one burner adapted to burn the fuel;
- a combustible gas sensor located within the lower portion of the interior and adapted to detect the presence of combustible gas in the air in the environment in which the heater is used;
- and
- an indicator operably connected to the combustible gas sensor, the indicator being adapted to produce at least one of an audible indication and a visible indication in response to a detection of combustible gas by the combustible gas sensor.
2 more elements
Dependencies are inferred from the claim text.