The Principle behind the Patent
Denk has protected the Wax Burner by law. The following explanations are intended to help the user understand how it works.
The function can be illustrated schematically by means of the following sketch. The flame of the wick heats the burner and thus conducts the heat energy into the wax surrounding the burner. The wax melts and is transported by the glass-fibre wick upwards for burning. This cycle continues for as long as there is wax to act as a fuel.
The simple concept is the result of three years of development before we were able to launch our invention onto the market. The Wax Burner is the sum of many details which we would like to explain in the next drawing.
1. The burner is made of aircraft aluminium and is located centrally in the crucible. In order to ensure that the heat is conducted evenly, the burner must have the same wall thickness throughout and be manufactured in one piece. This requires a very special manufacturing process which, among other things, is employed in the precise manufacture of aluminium parts in the aviation industry. Particularly important is not just the shape and workmanship quality of the burner but also the quality of the aluminium used.
2. In contrast to normal candles, the wax burner uses a non-burnable permanent wick. This permanent wick consists of homogeneous, linear glass-fibre filaments of a defined thickness. The glass-fibre wicks are manufactured especially to our specifications. Only this set-up enables the liquid wax to be transported from the bottom upwards for burning. Our glass-fibre wicks are made of large, continuously long filaments, which make them not only robust and durable but also harmless to health. The glass fibres are not damaged during the burning process as the melting temperature of the glass is not reached.
3. The glass-fibre wick is also surrounded by a thermal metal coil. This also represents an innovation. It means we can ensure that additional heat is directed into the wick and thus guarantee a fast and even transport of the wax.
4. The wax burner is made of heat resistant CeraNatur®, CeraLava® or Granicium® ceramics. Although the liquid wax has a temperature of just 65°C, the ceramic material must be heat resistant precisely at the contact point with the burner. Fracture caused by heat would lead to the liquid wax leaking out.
5. The shape of the Wax Burner is essential for the correct functioning of the device. Size, surface and shape of the aluminium burner are precisely tailored to the volume and surface of the crucible. If, for example, the burner was placed in a vessel that was too small, the wax could be overheated and would in certain circumstances even reach its self-ignition temperature. Equally, the melting cycle would also not function properly in a vessel that was too large because the melting effect would be insufficient.