Method for regulating a heating unit, and heating unit

Abstract

A method for regulating a heating unit, and heating unit, are provided. A method is provided for regulating a heating unit, and to a heating unit which includes a combustion chamber, combustion air being introduced into the combustion chamber via a controllable blower. A rotational speed of the blower wheel is detected. The purpose is to make it possible to ascertain an air volume flow with little complexity. The method is characterized in that a static pressure and/or a power consumption of the blower is/are ascertained, a volume flow of the combustion air being determined on the basis of the rotational speed in conjunction with the static pressure or the power consumption. For this purpose, the heating unit includes a rotational speed sensor and a pressure sensor and/or a power sensor.

1 .- 6 . (canceled) 
     
     
         7 . A method for regulating a heating unit that includes a combustion chamber into which combustion air is introduced via a controllable blower having a blower wheel, comprising:
 detecting a rotational speed of the blower wheel;   ascertaining at least one of a static pressure and a power consumption of the blower; and   determining a volume flow of the combustion air on the basis of the rotational speed in conjunction with at least one of the static pressure and the power consumption.   
     
     
         8 . The method as recited in  claim 7 , further comprising ascertaining at least one reference value for at least one of a pressure coefficient and a power coefficient as a function of a volume flow coefficient, wherein the at least one reference value is taken into account when determining the volume flow. 
     
     
         9 . The method as recited in  claim 8 , wherein the at least one reference value includes a plurality of reference values, the method further comprising storing the reference values as at least one of a pressure coefficient characteristic curve and a power coefficient characteristic curve. 
     
     
         10 . The method as recited in  claim 7 , wherein the power consumption of the blower is ascertained from an electrical power consumed by an electric blower motor, a degree of efficiency being taken into account. 
     
     
         11 . The method as recited in  claim 7 , wherein the static pressure is ascertained downstream from the blower in a flow direction. 
     
     
         12 . A heating unit for carrying out a method for regulating a heating unit that includes a combustion chamber into which combustion air is introduced via a controllable blower having a blower wheel, the method including detecting a rotational speed of the blower wheel;
 ascertaining at least one of a static pressure and a power consumption of the blower; determining a volume flow of the combustion air on the basis of the rotational speed in conjunction with at least one of the static pressure and the power consumption, the heating unit being for a heating medium and comprising:   the combustion chamber into which combustion air may be fed via the blower and fuel may be fed via a feed line;   a rotational speed sensor; and   at least one of a pressure sensor and a power sensor.   
     
     
         13 . The device as recited in  claim 12 , wherein the heating medium includes water.