Heating apparatus and method of operating a heating apparatus

Abstract

A heating apparatus for generating a hot air flow comprises a single fan, a burner heating element and a resistance heating element. In this respect, an air passage that conducts air to be heated and a combustion air passage that leads to a burner adjoin the fan downstream, wherein a combustion air flow in the combustion air passage can be controlled by a control element associated with the combustion air passage.

1 . A heating apparatus for producing a hot air flow, in particular for a camper, having a single fan; a burner heating element; and a resistance heating element, wherein an air passage that conducts air to be heated and a combustion air passage that leads to a burner adjoin the fan downstream; and wherein a combustion air flow in the combustion air passage can be controlled by a control element associated with the combustion air passage. 
     
     
         2 . The heating apparatus of  claim 1  wherein the control element is arranged in the combustion air passage. 
     
     
         3 . The heating apparatus of  claim 1  wherein a backflow line connects the combustion air passage and an inlet of the fan flow-wise. 
     
     
         4 . The heating apparatus of  claim 3  wherein the control element is arranged in the backflow line. 
     
     
         5 . The heating apparatus of  claim 4  wherein the control element allows a flow from the combustion air passage to the inlet and blocks a flow from the inlet to the combustion air passage. 
     
     
         6 . The heating apparatus of  claim 1  wherein it comprises a sensor for detecting the combustion quality at the burner; and in that the sensor is coupled to the control element. 
     
     
         7 . The heating apparatus of  claim 1  wherein the fan comprises a single fan wheel that feeds the air passage and the combustion air passage. 
     
     
         8 . The heating apparatus of  claim 1  wherein the fan comprises a useful air fan wheel that feeds the air passage and a combustion air fan wheel that feeds the combustion air passage. 
     
     
         9 . The heating apparatus of  claim 1  wherein the useful air fan wheel and the combustion air fan wheel are rotatably supported, with a rotational movement of the useful air fan wheel being coupled to a rotational movement of the combustion air fan wheel. 
     
     
         10 . The heating apparatus of  claim 1  wherein the control element is a valve flap or a throttle plate. 
     
     
         11 . The heating apparatus of  claim 1  wherein the control element is a guide element within the fan with which an internal backflow can be released. 
     
     
         12 . A method of operating a heating apparatus for producing a hot air flow, in particular for a camper, having a single fan, wherein an air passage that conducts air to be heated and a combustion air passage that leads to a burner adjoin the fan downstream, said method comprising the following steps:
 a) providing a combustion air flow produced by the fan in the combustion air passage;   b) providing a useful air flow produced by the fan in the air passage, with the useful air flow becoming the hot air flow by heating; and   c) setting the combustion air flow by a control element.   
     
     
         13 . The method of  claim 12  wherein step c) takes place by a complete or partial closing of the combustion air passage. 
     
     
         14 . The method of  claim 12  wherein step c) takes place by a complete or partial channeling away of the combustion air flow to an inlet of the fan. 
     
     
         15 . The method in accordance of  claim 12  wherein the combustion air flow and the useful air flow are provided by a single fan wheel. 
     
     
         16 . The method of  claim 12  wherein the combustion air flow is provided by a combustion air fan wheel and the useful air flow is provided by a useful air fan wheel. 
     
     
         17 . The method of  claim 12  wherein the combustion air flow is set in dependence on the combustion quality at the burner.