Abstract: A heating device is presented for surface heating of a body so as to maintain a required temperature of the body. The heating device comprises an electrical heating element and a power source for supplying a required voltage thereto. The heating element comprises first and second conductors, wherein the first conductor is made of a material with relatively high specific resistivity as compared to that of the second conductor, and the second conductor is made of a material with high heat conductivity. The first and second conductors are accommodated in spaced-apart parallel relationship along their lengths such that, when they are connected to the power source, electric currents flow in the conductors in opposite directions, and magnetic fields created in the vicinity of the first and second conductors are completely compensated. The first conductor thus serves as a heater and the second conductor as a heat diffuser.

Abstract: An electrical heating unit is presented for use in a heating device for heating an object to a required temperature and enabling maintaining this temperature of the object. The heating unit may have the following configuration: first and second elements each made of a material with a specific resistivity in a range of about 0.01-0.

Abstract: An electrical heating unit is presented for use in a heating device for heating an object to a required temperature and enabling maintaining this temperature of the object. The heating unit may have the following configuration: first and second elements each made of a material with a specific resistivity in a range of about 0.01-0.

Abstract: Heating device having a substantially flat heating element with specifically selected physical parameters is provided for heating an object to a required temperature. The physical parameters are selected such as to, at a given power and at a selected voltage supply to the heating element, provide as low as desired temperature gradient between the temperature of the outer surface of the heating element through which beat is dissipated and the required temperature of the object. Heating devices of the invention may be implemented in domestic heaters, in food cooking devices, in medical devices, etc. Also provided is a method for designing heating elements for use in such devices.

Abstract: A heating device is presented for surface heating of a body so as to maintain a required temperature of the body. The heating device comprises an electrical heating element and a power source for supplying a required voltage thereto. The heating element comprises first and second conductors, wherein the first conductor is made of a material with relatively high specific resistivity as compared to that of the second conductor, and the second conductor is made of a material with high heat conductivity. The first and second conductors are accommodated in spaced-apart parallel relationship along their lengths such that, when they are connected to the power source, electric currents flow in the conductors in opposite directions, and magnetic fields created in the vicinity of the first and second conductors are completely compensated. The first conductor thus serves as a heater and the second conductor as a heat diffuser.

Abstract: Heating device having a substantially flat heating element with specifically selected physical parameters is provided for heating an object to a required temperature. The physical parameters are selected such as to, at a given power and at a selected voltage supply to the heating element, provide as low as desired temperature gradient between the temperature of the outer surface of the heating element through which beat is dissipated and the required temperature of the object. Heating devices of the invention may be implemented in domestic heaters, in food cooking devices, in medical devices, etc. Also provided is a method for designing heating elements for use in such devices.

Abstract: Heating device having a substantially flat heating element with specifically selected physical parameters is provided for heating an object to a required temperature. The physical parameters are selected such as to, at a given power and at a selected voltage supply to the heating element, provide as low as desired temperature gradient between the temperature of the outer surface of the heating element through which heat is dissipated and the required temperature of the object. Heating devices of the invention may be implemented in domestic heaters, in food cooking devices, in medical devices, etc. Also provided is a method for designing heating elements for use in such devices.