Electrical heating device and suitable frame

An electrical heating device comprising:

• a frame, which forms on oppositely situated sides openings for the passage of a medium to be heated, and
• a layer structure, which is arranged in the frame and which comprises the layers of corrugated rib elements and heat generating elements, wherein each heat generating element has a PTC element arranged between parallel contact plates,
• wherein the individual layers extend from one opening of the housing to the other in the passage direction of the medium, wherein in the passage direction of the medium to be heated and arranged one behind the other within one single layer of the layer structure at least two corrugated-rib elements are provided, their corrugated ribs being arranged offset laterally to the passage direction of the medium to be heated and within the layer and wherein the PTC elements are arranged in a uniform heat generating element extending over several levels.

A frame for an electrical heating device, which forms openings for the passage of a medium to be heated on oppositely situated sides, the frame including a layer structure comprising layers of corrugated-rib elements and at least one heat generating element which abuts said corrugated-rib element and comprises at least one PTC element arranged between parallel contact plates, the frame comprising:

• two frame elements forming the openings, and
• at least one frame intermediate element arranged between them, which can be joined together by mutually engaging latching elements and that the elements forming the frame are formed such that a frame formed solely by the frame elements forms an accommodation space extending in the passage direction of the medium to be heated, which is appropriately formed for the accommodation of the layer structure with a level of corrugated ribs and heat generating elements, and such that that a frame formed by the frame elements and the frame intermediate element forms an accommodation space extending in the passage direction of the medium to be heated, which is appropriately formed for the accommodation of the layer structure with several levels of corrugated ribs and heat generating elements.