Heating systems – Automatic control – Heat source is a reverse cycle refrigerating system or heat...
Patent
1993-07-21
1994-09-27
Bennett, Henry A.
Heating systems
Automatic control
Heat source is a reverse cycle refrigerating system or heat...
237 123C, 1231425R, G05D 2300
Patent
active
053501144
ABSTRACT:
A diesel heater includes a combustion chamber and a fuel pump for pumping diesel fuel to the combustion chamber. An air supply device supplies combustion air to the combustion chamber. An igniter ignites the diesel fuel to generate combustion heat. A heat exchange fluid supplying device supplies fluid in heat exchange relationship with the combustion heat. A thermal sensor in contact with the heat exchange fluid generates a temperature signal related to the temperature of the heat exchange fluid. A flame detector detects an ignited diesel fuel flame and generates a flame signal in response thereto. A microprocessor includes a memory and a plurality of input/output ports wherein the input/output ports are electrically connected to the thermal sensor, the fuel pump, the heat transfer fluid supplying device, the igniter, the combustion air supply device, and the flame detector. The memory stores a normal operating sequence, a start-up sequence, and a tail start period for the start-up sequence. An input device allows the current day and current time to be entered into the microprocessor memory. The microprocessor thereafter updates the current day and current time. A lower threshold temperature for the heat exchange fluid is entered into the microprocessor memory by the input device. A start day and start time are also entered into the microprocessor memory by the input device. The microprocessor automatically initiates the start-up sequence when the heat transfer fluid falls below the lower threshold temperature or when the current day and the current time equal the start day and the start time. The microprocessor executes the normal operating sequence when the flame signal is received.
REFERENCES:
Gordon Kelling, Kirk Nelson and Bill Byrnes, SAE Technical Paper Series No. 922434 "Diesel Fuel Fired Heaters", Nov. 16, 1992.
Byrnes William A.
Nelson Kirk A.
Bennett Henry A.
The Budd Company
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