Mobile heating device, and method for operating a mobile heating device

Abstract

A mobile heating device, comprisinga heater assembly including a fuel chamber, anda fuel supply line for supplying liquid fuel to the heater assembly,where the heater assembly further includes an evaporator receiving arrangement for evaporating liquid fuel, said arrangement comprising an evaporator receiving body for receiving an evaporator element for distributing and evaporating liquid fuel, where the fuel supply line comprises a supply pipe with an inlet for inputting fuel and an outlet for outputting fuel to the combustion chamber,where the fuel supply line further includes an emptying device for partly or completely emptying the fuel supply line through the outlet.

1 : A mobile heating device, comprising
 a heater assembly including a combustion chamber, and   a fuel supply line for supplying liquid fuel to the heater assembly,   wherein the heater assembly comprises an evaporator receiving arrangement for evaporating liquid fuel, said arrangement comprising an evaporator receiving body for receiving an evaporator element for distributing and evaporating liquid fuel,   wherein the fuel supply line comprises a supply pipe having an inlet for inputting fuel and an outlet for outputting fuel to the combustion chamber,   wherein the fuel supply line further comprises an emptying device for at least one of: partially and completely emptying the fuel supply line through the outlet.   
     
     
         2 : The heating device according to  claim 1 , wherein the emptying device comprises a nucleating device including one or more of: at least one rough and at least one structured nucleation surface for forming boiling bubbles. 
     
     
         3 : The heating device according to  claim 2 , wherein the nucleation surface is arranged on at least one of: an inner circumferential surface of the supply pipe, arranged on an inner surface of a connecting piece arranged at the inlet of the supply pipe, and arranged in a component inserted into the fuel supply line,
 wherein the nucleation surface extends in particular over the entire inner circumferential surface of the supply pipe.   
     
     
         4 : The heating device according to  claim 2 , wherein a further element is arranged in the fuel supply line, in the supply pipe, the further element having the nucleation surface, wherein the further element is formed as a displacement wire. 
     
     
         5 : The heating device ( 100 ) according to  claim 2 , wherein the nucleation surface has been produced by at least one of: means of mechanical deformation, means of applying a coating, means of milling, and means of an etching process. 
     
     
         6 : The heating device according to  claim 3 , wherein the supply pipe comprises a first supply pipe and a second supply pipe and the component is at least one of: arranged between the first supply pipe and the second supply pipe and wherein the component comprises one or more bodies arranged therein, wherein at least one of the bodies comprises one or more of: glass and ceramics, wherein a surface of at least one of the bodies forms are part of the nucleation surface. 
     
     
         7 : The heating device according to  claim 1 , wherein the emptying device comprises a heat supply element that is arranged on at least one of: an outer circumferential surface of the supply pipe ( 5 ) and an outer surface of a connecting piece arranged at the inlet of the supply pipe. 
     
     
         8 : The heating device according to  claim 7 , wherein the heat supply element comprises an active heating element. 
     
     
         9 : The heating device according to  claim 7 , wherein the heat supply element comprises a passive heat conducting element which conducts heat from a heat source to at least one of: the outer circumferential surface and outer surface, wherein the passive heat conducting element comprises, a hose clamp. 
     
     
         10 : The heating device according to  claim 1 , wherein the fuel supply line is configured to extend from a fuel source to the heating device as a fuel supply to the heating device, wherein the fuel supply line comprises a first zone and a second zone, wherein the fuel supply line further comprises a back-suction device in the first zone, wherein the back-suction device comprises a fuel reservoir, wherein the back-suction device is designed to suck back fuel from the second zone into the first zone by means of a change in volume of the fuel reservoir. 
     
     
         11 : The heating device according to  claim 10 , wherein the fuel reservoir is formed by at least one cavity and at least one movable piston, such that the fuel sucked back from the second zone can be received at least partially in the fuel reservoir. 
     
     
         12 : The heating device according to  claim 9 , wherein the back-suction device comprises a controller. 
     
     
         13 : The heating device according to  claim 1 , wherein the fuel supply line is welded to the evaporator receiving body. 
     
     
         14 : A method for operating a mobile heating device with an evaporator burner, wherein a complete or partial emptying of a fuel supply line of the heating device takes place, wherein the heating device comprises a supply pipe with an inlet for inputting fuel and an outlet for outputting fuel to a combustion chamber, the method comprising the following steps:
 initiating the termination of a heating process,   terminating a fuel supply through the inlet of the supply pipe,   forming boiling bubbles in the fuel on a nucleation surface and transferring at least a portion of the fuel present in the fuel supply line into the combustion chamber by means of the boiling bubbles, and   burning the transferred portion of the fuel in the combustion chamber.   
     
     
         15 : The method according to  claim 14 , further comprising: back-sucking fuel remaining in a second zone of the fuel supply line into a first zone of the fuel supply line, by a volume change of a fuel reservoir arranged in the first zone of the fuel supply line. 
     
     
         16 : The method according to  claim 15 , wherein the method comprises, after the back-sucking, the steps of:
 initiating another heating process with the heating device;   pushing out the fuel from the fuel reservoir into the fuel supply line;   pushing out at least a portion of the pushed-out fuel.   
     
     
         17 : The method according to  claim 16 , wherein pushing out at least the portion of the pushed-out fuel comprises pushing out all of the pushed-out fuel. 
     
     
         18 : The heating device according to  claim 11 , wherein the fuel reservoir is formed by at least one deformable supply line section, arranged in series in the fuel supply line, such that the fuel sucked back from the second zone can be received at least partially in the fuel reservoir. 
     
     
         19 : The heating device according to  claim 9 , wherein the back-suction device is connected to a controller.