Heating device

Abstract

A heating device, in particular for heating at least one fluid, includes at least one first heating resistor and at least one supply electronics unit, which is provided for supplying at least the first heating resistor with current provided by at least one first photovoltaic plant. It is proposed that the supply electronics unit is provided for operating at least the first heating resistor in a clocked manner at least in one operating mode.

1 . A heating device, in particular for heating at least one fluid, with at least one first heating resistor and with at least one supply electronics unit, which is provided for supplying at least the first heating resistor with current provided by at least one first photovoltaic plant, wherein the supply electronics unit is provided for operating at least the first heating resistor in a clocked manner at least in one operating mode. 
     
     
         2 . The heating device according to  claim 1 , wherein the supply electronics unit is provided for operating at least the first heating resistor at a frequency between 1 kHz and 100 kHz in at least one operating mode. 
     
     
         3 . The heating device according to  claim 1 , wherein the supply electronics unit is provided for adapting a duty cycle of the clocked operation for setting a power dropping across the heating resistor. 
     
     
         4 . The heating device according to  claim 3 , wherein the supply electronics unit is provided for varying a duty cycle of the clocked operation at least of the first heating resistor for optimizing the power dropping across the first heating resistor. 
     
     
         5 . The heating device according to one of the preceding  claim 1 , wherein the supply electronics unit comprises at least one buffering capacity that is allocated to the first heating resistor and is provided for an at least intermediary storage of energy from the photovoltaic plant. 
     
     
         6 . The heating device according to  claim 5 , wherein the supply electronics unit is provided for measuring a voltage over the buffering capacity to determine a power dropping across the heating resistor. 
     
     
         7 . The heating device according to  claim 4 , wherein the supply electronics unit is provided for selecting the duty cycle of the clocked operation at least depending on an average voltage applied at the buffering capacity. 
     
     
         8 . The heating device according to  claim 5 , wherein the heating resistor is directly connected to a buffering capacity of the supply electronics unit. 
     
     
         9 . The heating device according to  claim 5 , wherein the buffering capacity is provided for being directly connected to the photovoltaic plant. 
     
     
         10 . The heating device according to  claim 1 , wherein the supply electronics unit is provided for varying a frequency of the clocked operation. 
     
     
         11 . The heating device according to  claim 10 , wherein the supply electronics unit is provided for varying the frequency of the clocked operation depending on a power retrievable from the photovoltaic plant. 
     
     
         12 . The heating device according to  claim 1 , wherein the supply electronics unit comprises at least one sensor unit, which is provided for analyzing a frequency of a current retrieved from the photovoltaic plant for the purpose of deducing a behavior typical for an electric arc. 
     
     
         13 . The heating device according to  claim 1 , wherein the supply electronics unit comprises at least one temperature sensor. 
     
     
         14 . The heating device according to  claim 13 , wherein the supply electronics unit is provided for at least reducing an operation at least of the first heating resistor in case a limit temperature is exceeded, via the temperature sensor. 
     
     
         15 . The heating device according to  claim 13 , comprising a fluid transport unit, which is provided for conveying a fluid that is to be heated past the heating resistor and which is controlled and/or supplied by the supply electronics unit. 
     
     
         16 . The heating device according to  claim 1 , wherein the supply electronics unit comprises a supervising unit, which is provided for monitoring at least a serviceability of a control unit that controls the clocked operation at least of the one heating resistor. 
     
     
         17 . The heating device according to  claim 1 , wherein an control electronics unit of the supply electronics unit is provided for being supplied by the photovoltaic plant. 
     
     
         18 . A method for operating a heating device according to  claim 1 . 
     
     
         19 . A system with a photovoltaic plant and with a heating device according to  claim 1 . 
     
     
         20 . The heating device according to  claim 2 , wherein the supply electronics unit is provided for adapting a duty cycle of the clocked operation for setting a power dropping across the heating resistor.