For the heating and temperature control of liquids and solids that are intended for consumption, devices exist in the prior art in which the thermal energy input takes place by heating a vessel in which the material to be heated is located or by way of a wired heating device that is inserted into the vessel ( e.g. an immersion heater) or by heating the vessel by exposing it to an external energy source (e.g. infrared or microwave). In many temperature control tasks, such a form of heating or temperature control is not possible or not practicable, for example when controlling the temperature of a drink in disposable dishes (e.g. paper cups). In the case of many heating or temperature control tasks, it is also necessary to adjust a temperature that is accurate to the degree and maintained throughout the heating task and / or does not exceed a certain value on the contact surface where the heat energy is introduced. This requirement for a heating / temperature control task also exists in other life science areas, such as laboratories, in which liquids are heated and tempered in heating and stirring devices. The task here is usually to agitate the liquid.
A method has been developed in which the material to be heated / tempered is heated directly by adding a heating element that is heated by induction. The method enables the temperature in the medium and on the surface of the heating element to be measured continuously and, based on these measured values, which are transmitted by radio transmission to an external control unit, the heat input is controlled. In addition, a process was developed with which such an inductive energy input can be carried out in a very energy-efficient manner and in a very small design. Furthermore, the method can be designed in such a way that the heating element can also be used to agitate the medium. This results in advantages over methods according to the state of art. For example, a temperature control task can be carried out more quickly and always within the same period of time in the case of non-metallic containers which, for example, have different designs or heat transfer. Furthermore, bio-technological or chemical tasks can be carried out with the method, for example by using the heating element as a thermal reactor, especially if the surfaces of the heating element are coated with compounds that require a certain temperature for an optimal effect, such as catalysts.
The process and the devices have been filed for a patent (Patent EP3610699A1).