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Sealed gas heater with forced draft and regulation by microprocessor

  • US 4,519,540 A
  • Filed: 08/13/1982
  • Issued: 05/28/1985
  • Est. Priority Date: 08/27/1981
  • Status: Expired due to Term
First Claim
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1. A control device for a simple or mixed gas boiler with forced draft in which a sealed enclosure encloses a burner, a heating body, an evacuation hood for the burned gases and an extraction fan, fresh air that is needed for the combustion of the burner being admitted from an air distribution box placed at the upper section of said enclosure, said boiler including a burner gas inlet, electrovalve that is connected to a disconnecting box, a reverse valve distributing primary water either towards a long circuit during the heating operation, or towards a short circuit during a drawing, a circulation pump and a lighter, the boiler being furthermore equipped with a plurality of sensors or detectors that are designed to collect temperature, output or operation data, characterized by the fact that the overall control, safety and uninterrupted dependency functions of air output to gas output are ensured by a control box (26) with a microprocessor which centralizes the data received from the various sensors, converts them into digital signals ready to operate the lighter (24), the circulation pump (19), the gas inlet electro valve (12) and the extraction fan (6), according to control data that are pre-programmed and memorized by the microprocessor.

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