НЕIZКÖRРЕR FÜR ЕINЕ WАRМWАSSЕRНЕIZUNG

The invention refers to a heating element for a hot water heating with a warmth a delivering housing, which exhibits a return of the hot water heating attached flow channels to a Vorund. Well-known heating elements for hot water heatings can be differently trained (CH 682,105 A5, DE 197 43 159 A1, DE 199 25 023 A1, DE 1gg 48,776 A1). These heating elements it is however common to all that they exhibit a housing with vertical flow channels between lower and upper collecting lines, which are on the other hand to the return of the hot water heating attached on the one hand to the advance and. Independently of the kind of connection of the main sewers at the Vorund a convection current stops itself return of the hot water heating over the flow channels between the lower and upper collecting lines with the consequence within the housing that the surface temperature of the housing is largest in the range of the upper main sewer and decreases against the lower main sewer. Although the temperature distribution of the heating elements depends the return of the hot water heating over the housing height on the one hand on the kind of connection of the main sewers at the Vorund and on the other hand on the temperature difference between the Vorund the return as well as the heating element flowing through quantity of water, the fundamental temperature increase from the lower must be taken to the upper collecting line in purchase. This means for example that the lower air layers are subjected not with the inlet temperature, but essentially only over the return temperature, because the heating element makes the inlet temperature available only within the range of the upper collecting line of the housing. Since with the use of housings from at least two with mutual distance ever forming housing situations behind-in-and-suppl.-lined up in each housing situation a similar Temperaturvert.eilung between the lower and the upper collecting line adjust for flow channels, none can be achieved the temperature radiation favouring higher temperature level also within the range of an outside housing situation. The invention is thus the basis the task in such a way to out-arrange a heating element for a hot water heating of the initially described kind that the respective employment of the heating element appropriate temperature distribution can be guaranteed by the housing. The invention solves the task posed thereby that the flow channels are switched into row at least by groups to a channel strand. By connecting the channel strands in row at least to a channel strand a free convection current is prevented by the housing and an obligation current by the channel strand is reached, which guarantees a certain heat distribution depending upon the process of the channel strand by the housing, because the temperature constantly decreases along the channel strand from the inlet side to the expiration operational sequence, attached attached to the advance, to the return. Thus the respective requirements appropriate temperature distribution can be achieved by the process of the channel strand by means of the heat-emitting surfaces of the housing, whereby because of the obligation flow the flow channels do not require vertical adjustment. Rather by horizontal running flow channels particularly favorable heat distributions are reached by means of the housing height, if the lowest flow channel of a channel strand to the advance and the highest flow channel of the horizontal running flow channels are attached to the return of the hot water heating, because in this case a temperature gradient from top to bottom increasing over the housing height will receive, which guarantees favourable warming up conditions for the spatial air which can be warmed up. The flow channels switched to a channel strand into row cannot only with einlagigen heating elements, but also with heating elements with a housing from at least two, ever housing situations with advantage, forming behind-in-and-suppl.-lined up with mutual distance, for flow channels, to be used. The flow channels of the individual housing situations switched to one channel strand each into row can be attached parallel to the Vorund return of the hot water heating, whereby perhaps within the range of the individual housing situations the flow channels can be arranged in different way, in order to be able to consider special warming up conditions due to different heat distributions over the heat-emitting surfaces of the housing situations. In addition, it will possible to subject an outside housing situation with a higher temperature level in order to increase the portion of the radiant heat. For this purpose to one channel strand each into row, the flow channels of an outside housing situation with that channel strand in row switched flow channels of the other housing situation and/or the other housing situations joined in parallel a series connection, connected switched, attached to the advance of the hot water heating, to one with the return, can form 2 RKs 412,671 B at the output in each case. In the design the invention article is for example represented. Show: Fig. 1 a heating element according to invention in a simplified front view, Fig. 2 this heating element in a plan view and the Fig. 3 and 4 two remark examples of the hydraulic connection of the individual housing situations one in the Fig. 1 and 2 of represented three-fold heating element in each case in a simplified block diagram. Into the Fig. 1 and 2 represented heating elements exhibits a housing 1, which is compound from three behind-in-and-suppl.-lined up housing situations of 2, 3 and 4. The individual housing situations of 2, 3, and 4 form in each case a plate-type heat exchanger out of two welded with one another sheet metals, which include formed out flow channels 5 between itself by a deep-drawing or coining/shaping. These flow channels 5 are beside-in-and-suppl.-lined up however not as with conventional heating elements of this kind between a lower and an upper collecting line, but run in horizontal direction one above the other and are per housing situation of 2, 3 and/or 4 to a channel strand 6 into row switched. Uber of connections 7 and 8 is attached the heating element in conventional way to the advance g and the return 10 of a hot water heating, whereby itself according to the Fig. 3 and 4 different hydraulic Verbindungsmöglichkeiten result in. Independently of the represented circuit possibilities the channel strands 6 of the individual housing situations of 2 of being able to use 3 and 4 from bottom to top in each case flowed through, so that a from bottom to top decreasing temperature gradient results in each case, in order the advantage of large a temperature difference between the surface temperature of the plate-type heat exchangers and from downside inflowing, spatial air as possible which can be warmed up. After the Fig. the channel strand 6 of the outside housing situation of 2 attached to the advance 9 is positioned to 3 in series with a parallel connection of the channel strands 6 of the two other housing situations of 3 and 4, so that the outlet temperature by the housing situation of the plate-type heat exchanger of the entrance temperature of the plate-type heat exchangers of the two other housing situations of 3 and 4 formed corresponds to 2, which are at the output to the return 10 attached. This means that the housing situation of 2 with a higher middle temperature than the two other housing situations 3 and 4 is subjected. The heat emission within the range of the housing situation of 2 is supported by this measure by radiation. If the radiant heat is not to be used in such an extent, then become in accordance with the Fig. 4 the coils of pipe 6 of the individual housing situations of 2, 3 and 4 in a parallel connection attached to the advance 9 and the return 10 of the hot water heating, which resembles conditions of temperature within the range of the individual housing situations 2, 3 and/or 4 guarantees. A heating element can be operated by appropriate transfer valves also in the two switching types. The air heating up between the individual housing situations of 2, 3 and 4 can be improved in usual way by convection sheet metals 11, which can be arranged on one or both sides of the plate-type heat exchangers. The invention is naturally not limited to the represented remark example, because due to the obligation current the process of the flow channels 5 can be selected to a large extent freely, without having to fear a free convection current of the heater water within the heating element. From there also vertical flow channels 5 can be beside-in-and-suppl.-lined up, if an even temperature distribution is demanded over the heating element height. In addition the invention can successfully be used also with GliederheJzkörpern, if it is ensured that the individual flow channels are switched into row at least by groups to a channel strand.