Control or regulating system for automatic gas furnaces of heating plants
AssigneeLandis & Gyr Business Support AG
InventorsAnton Pallek, Michael Oberst
Life of this patent
Estimating the term…
Abstract
A control or regulating system for an automatic heat furnace is disclosed. This control system simplifies the construction of automatic gas furnaces for heating plants. The control system operates the furnaces with a high degree of efficiency and low pollutant emission, even at partial capacity. The adjusting element or mechanism for air is a blower with adjustable rotational speed which is driven by a motor. The motor is controllable by, preferably, digital pulse-width modulated control signals of a control aggregate acted upon by a regulator. A gas valve regulates the pressure of the gas supplied to the burner as a function of the air pressure in the line leading from the blower to the burner.
Claims25
A control system for automatic gas furnaces of heating plants comprising,
- a burner located in a heating boiler to which a combustible fluid is fed,
- a first adjusting means for adjusting pressure of said combustible fluid, and
- a second adjusting means connected to said burner by a connecting line for adjusting pressure of air conveyed in said connecting line, and having a regulator for regulating a quantity of air conveyed in the connecting line,
- said second adjusting means further comprising,
- a blower having adjustable rotational sped for conveying said air through said connecting line to said burner of said heating boiler,
- a d.c. motor for driving said blower,
- a control aggregate for controlling said motor via digital pulse-width modulated control signals acting on said regulator,
- a comparator for comparing actual rotational speed values of said blower with a desired rotational speed value supplied by said regulator as an output signal, and
- wherein said control system is controllable as a function of output signals from said comparator, thereby regulating the rotational speed of said blower.
Dependencies are inferred from the claim text.