Hot Water Tank

Abstract

Disclosed is a hot water tank ( 10 ) comprising an outer container ( 14 ) and an inner container ( 12 ) that is disposed inside the outer container ( 14 ), is used for receiving hot water, and is located at a distance from the outer container ( 14 ). A heat insulation layer ( 26 ) is placed between the inner container ( 12 ) and the outer container ( 14 ). The inner container ( 12 ) is provided with planar polygonal walls ( 22 a, 22 b, 28, 28 b ) while the outer container ( 14 ) is provided with planar polygonal walls ( 24 a, 24 b, 30 a, 30 b ). The inner container ( 12 ) and/or the outer container ( 14 ) are equipped with supporting elements ( 16 ) which are configured so as to counteract an internal pressure of the hot water tank ( 10 ) in order for the hot water tank ( 10 ) to maintain the shape thereof.

1 . A hot water tank, with an outer container,
 an inner container which is arranged in the outer container and which serves for the reception of hot water and is spaced apart from the outer container, and   a heat insulation layer which is arranged between the inner container and the outer container,   characterized in that the inner container has planar polygonal walls,   the outer container has planar polygonal walls, and   the planar polygonal walls of the inner container and/or of the outer container have supporting elements which are designed such that they counteract an internal pressure of the hot water tank so that the hot water tank preserves its shape.   
   
   
       2 . The hot water tank of  claim 1 , characterized in that the inner container has at least two polygonal walls which lie opposite one another and are parallel to one another, and the outer container has at least two polygonal walls which lie opposite one another and are parallel to one another. 
   
   
       3 . The hot water tank of  claim 1  characterized in that the inner container has at least four polygonal walls, of which in each case two lie opposite one another and are parallel to one another, and the outer container has at least four polygonal walls, of which in each case two lie opposite one another and are parallel to one another. 
   
   
       4 . The hot water tank of  claim 1 , characterized in that at least two polygonal walls of the inner container which lie opposite one another are congruent with one another, and at least two polygonal walls of the outer container which lie opposite one another are congruent with one another. 
   
   
       5 . The hot water tank of  claim 1 , characterized in that the polygonal walls are rectangular. 
   
   
       6 . The hot water tank of  claim 1 , characterized in that the supporting elements are arranged at least partially on one wall of the outer container. 
   
   
       7 . The hot water tank of  claim 1 , characterized in that the supporting elements are designed at least partially as stamped-out portions of the walls of the outer container. 
   
   
       8 . The hot water tank, characterized in that the inner container consists of a noncorrosive material. 
   
   
       9 . The hot water tank of  claim 1 , characterized in that the inner container consists of a high-grade steel. 
   
   
       10 . The hot water tank of  claim 1 , characterized in that the outer container consists of a metal. 
   
   
       11 . The hot water tank of  claim 1 , characterized in that the outer container consists of a material which is selected from a group composed of aluminum and aluminum compounds. 
   
   
       12 . The hot water tank of  claim 1 , characterized in that the outer container consists of extruded aluminum or an extruded aluminum compound. 
   
   
       13 . The hot water tank of  claim 1 , characterized in that the outer container has a first part in the form of a half shell and a second part in the form of a half shell. 
   
   
       14 . The hot water tank of  claim 1 , characterized in that the heat insulation layer has a polyurethane foam. 
   
   
       15 . The hot water tank of  claim 1 , characterized in that the heat insulation layer has a synthetic fiber material. 
   
   
       16 . A method for producing a hot water tank of  claim 1 , with the following steps:
 provision of a first part in the form of a half shell and of a second part in the form of a half shell of the outer container,   application of foamable plastic materials to an inner side of the first part and an inner side of the second part of the outer container,   introduction of the inner container between the first part in the form of a half shell and the second part in the form of a half shell of the outer container,   bracing of the inner container with the first part and the second part of the outer container by means of a bracing device and action upon the inner container with an internal pressure above atmospheric pressure, until the heat insulation layer is formed by the foaming and curing of the plastic materials between the inner container and the first and second parts in the form of a half shell of the outer container, reduction of the internal pressure in the inner container to ambient pressure, and removal of the bracing device.