Heating block for an electric continuous flow heater and electric continuous flow heater

Abstract

The invention is directed to a heating block ( 100 ) for a continuous flow heater in which a water flow system with channels is arranged in the heating block ( 100 ). A heating path ( 300 ) of the water flow system forms a hottest channel ( 340 ) with a hottest heating element ( 341 ) during operation of the continuous flow heater. The hottest channel ( 340 ) is arranged downstream of at least one channel ( 310, 320, 330 ) of the heating path ( 300 ) in a flow direction ( 110 ). The hottest channel ( 340 ) of the heating path ( 300 ) is surrounded by at least four channels which are located between an outer surface ( 120 ) of the heating block ( 100 ) and the hottest channel ( 340 ). Accordingly, the hottest channel ( 340 ) of the continuous flow heater is surrounded by at least four channels and is shielded relative to an air space ( 160 ).

1 . Heating block for a continuous flow heater comprising:
 a water flow system,   wherein the water flow system is arranged in the heating block, and has a heating path, a channel of the heating path being the hottest during operation,   wherein a hottest heating element is arranged in the hottest channel, and the hottest channel is arranged downstream of at least one channel of the heating path in a flow direction,   wherein the hottest channel of the heating path is surrounded by at least four channels which are located between an outer surface of the heating block and the hottest channel so that the channel which is hottest during operation of the continuous flow heater is surrounded by at least four channels and is shielded relative to an air space.   
     
     
         2 . Heating block according to  claim 1 , wherein the hottest channel is surrounded by at least two channels which are unheated, and the hottest channel is surrounded by at least two further channels of the heating path so that the hottest channel is shielded relative to an outer surface by at least two unheated channels and by at least two heated channels. 
     
     
         3 . Heating block for a continuous flow heater comprising:
 at least two channels having a heating element in each instance,   wherein the heating channel with the heating element is hotter than heating elements during operation of the continuous flow heater,   wherein at least two unheated channels as insulating leading section are located upstream of channels with heating bodies in a flow direction, and at least two channels as insulating trailing channels are arranged downstream of heating channels in the flow direction,   wherein the hottest channel is surrounded by at least four channels so that the hottest channel is sealed relative to, and sealed off from, an air space by the surrounding channels in case of a defect in the hottest channel.   
     
     
         4 . Heating block according to  claim 3 ,
 wherein the heating path is formed of three channels with a heating element and the hottest heating channel, and   wherein the hottest channel is located downstream of the three channels viewed in flow direction.   
     
     
         5 . Heating block according to  claim 4 .
 wherein the hottest channel is surrounded in the heating block by at least two channels and particularly at least two, three or more than three unheated channels relative to an air space.   
     
     
         6 . Heating block according to  claim 5 , wherein the channels are arranged at least partially parallel to one another and parallel to the hottest channel. 
     
     
         7 . Electric continuous flow heater with a heating block according to  claim 3 .