AT403845B

AT403845B - Absorber for a solar collector

Info

Publication number: AT403845B
Application number: AT0260493A
Authority: AT
Original assignee: Goedl Albin
Priority date: 1993-12-23
Filing date: 1993-12-23
Publication date: 1998-05-25
Also published as: ATA260493A

Abstract

The invention relates to an absorber for a solar collector, with tubes 1 parallel to one another, in each case two of the adjacent tubes 1 being connected alternately to the top side and the underside by means of absorber plates 2, 3, the ends of which are bent around the tube casing so as partially to surround the latter, there being arranged on the underside of the absorber 4, between the ends 2', bent around the tube casings of adjacent tubes 1, of the lower absorber plates 2, clamping plates 5 of U-shaped cross-section, which bear with their legs 6 on the bends 2' of two adjacent lower absorber plates 2 and with their base 7 on the underside of the upper absorber plate 3 located between them. <IMAGE>

Description

       

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   Die Erfindung betrifft einen Absorber für einen Sonnenkollektor, mit zueinander parallelen Rohren, wobei jeweils zwei benachbarte Rohre abwechselnd an der Ober- bzw. Unterseite mittels Absorberblechen verbunden sind, deren Enden um den Rohrmantel, diesen teilweise umschliessend, gebogen sind. 



   Bei Absorbern dieser Art wurde es bekannt   (US 4, 351. 321   A) hakenförmige Absorberbleche vorzusehen, welche die zueinander parallelen Rohre des Absorbers einmal von der Oberseite und einmal von der Unterseite her, teilweise umfassen. 



  Diese Ausführungsform hat den Nachteil, dass die Lage der einzelnen Rohre nicht gesichert ist. 



   Aufgabe der Erfindung ist es, hier Abhilfe zu schaffen. erwähnten Art vor, dass an der Unterseite des Absorbers, zwischen den um die Rohrmäntel benachbarter Rohre gebogenen Enden der unteren Absorberbleche, im Querschnitt U-förmige, mit ihren Schenkeln an den Umbiegungen zweier benachbarter, unten liegender Absorberbleche und mit ihrer Basis an der Unterseite des dazwischen liegenden oberen Absorberbleches anliegende Spannblech angeordnet sind. 



   Die erfindungsgemäss vorgesehenen Spannblech sichern hiebei die Lage der Absorberrohre und verbessern zusätzlich noch die Wärmeleitfähigkeit des Absorbers. Die Anordnung der Spannblech erlaubt es darüberhinaus noch, bei der Fertigung grössere Toleranzen zuzulassen. 



   In weiterer Ausgestaltung ist vorgesehen, dass die freien Enden der Schenkel der Spannblech bis zur Ebene der unteren   Absorberbleche   ragen. Damit wird sichergestellt, dass die Absorberbleche von den Spannblechen nach aussen nicht überragt werden. 



  Als Material für die Absorberbleche wird vorzugsweise Kupfer verwendet, für die Spannblech vorzugsweise Aluminium. 



  Die Absorberrohre bestehen bevorzugt aus Kupfer. Mit ihren Enden sind sie in Sammelrohren eingelötet und bilden ein Rohrregister. 



   Die Erfindung wird nachstehend anhand der Zeichnung näher erläutert : 
 EMI1.1 
 
1Fig. 1. 



   Der Absorber ist als ganzes mit 4 bezeichnet. Er besitzt Absorberrohre 1, die mit ihren freien Enden in Sammelrohre 8 eingelötet sind. Die Rohre 1 sind dabei parallel zu einander angeordnet, wobei jeweils zwei benachbarte Rohre 1 abwechselnd an der Ober- bzw. Unterseite mittels Absorberblechen 2, 3 verbunden sind, deren Enden um den Rohrmantel, diesen teilweise umschliessend, gebogen sind. An der Unterseite des Absorbers 4 sind Spannblech 5 angeordnet. Die Spannblech 5 sind im Querschnitt U-förmig ausgebildet und liegen zwischen den um die Rohrmäntel benachbarter Rohre 1 gebogenen Enden 2'der unteren   Absorberbleche   2. Die Spannblech 5 liegen mit ihren Schenkeln 6 an den Umbiegungen 2'zweier benachbarter, unten liegender Absorberbleche 2 an. Die freien Enden der Schenkel 6 der Spannblech 5 ragen bis zur Ebene der unteren Absorberbleche 2. 



  

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   The invention relates to an absorber for a solar collector, with mutually parallel tubes, two adjacent tubes alternately connected on the top and bottom by means of absorber plates, the ends of which are bent around the tube shell, partially enclosing it.



   In the case of absorbers of this type, it has become known (US Pat. No. 4,351,321 A) to provide hook-shaped absorber plates which partially encompass the mutually parallel tubes of the absorber, one from the top and one from the bottom.



  This embodiment has the disadvantage that the position of the individual tubes is not secured.



   The object of the invention is to remedy this. mentioned type that on the underside of the absorber, between the ends of the lower absorber sheets bent around the pipe jackets of adjacent pipes, U-shaped in cross section, with their legs on the bends of two adjacent absorber sheets below and with their base on the underside of the intermediate tension plate are arranged between the upper absorber plate.



   The tensioning plate provided according to the invention secure the position of the absorber tubes and additionally improve the thermal conductivity of the absorber. The arrangement of the clamping plate also allows greater tolerances to be allowed during production.



   In a further embodiment it is provided that the free ends of the legs of the tensioning plate protrude to the level of the lower absorber plates. This ensures that the absorber sheets are not overlooked by the tensioning sheets.



  Copper is preferably used as the material for the absorber sheets, and aluminum is preferably used for the tensioning sheet.



  The absorber tubes are preferably made of copper. With their ends they are soldered into collecting pipes and form a pipe register.



   The invention is explained in more detail below with reference to the drawing:
 EMI1.1
 
1Fig. 1.



   The absorber is designated as a whole by 4. It has absorber tubes 1, which are soldered into header tubes 8 with their free ends. The tubes 1 are arranged parallel to one another, with two adjacent tubes 1 being connected alternately on the top and bottom by means of absorber plates 2, 3, the ends of which are bent around the tube shell, partially enclosing it. Clamping plate 5 are arranged on the underside of the absorber 4. The clamping plate 5 are U-shaped in cross-section and lie between the ends 2 ′ of the lower absorber plates 2 bent around the pipe jackets of adjacent pipes 1. The legs 6 of the clamping plate 5 rest against the bends 2 ′ of two adjacent, below-lying absorber plates 2 . The free ends of the legs 6 of the clamping plate 5 protrude to the level of the lower absorber plates 2.

Claims

1. Absorber for a solar collector, with tubes parallel to each other, with two adjacent ones Pipes alternately on the top or The underside is connected by means of absorber sheets, the ends of which are bent around the tube jacket, partially enclosing it, characterized in that on the underside of the absorber (4) is bent between the tubes (1) adjacent to the tube jacket Ends (2 ') of the lower absorber sheets (2) U-shaped in cross section, with their legs (6) on the Bends (2 ') of two adjacent, lower-lying absorber plates (2) and with their base (7) on the underside of the upper absorber plate (3) lying between them are arranged clamping plates (5). ** WARNING ** End of DESC field may overlap beginning of CLMS **.

2. Absorber according to claim 1, characterized in that the free ends of the legs (6) of the The tension plate (5) protrude to the level of the lower absorber plates (2). ** WARNING ** End of CLMS field knows overlap beginning of DESC **.