Direct current supply geothermal heating device

Abstract

The invention relates to a direct current supply geothermal heating device, and relates to the technical field of electric heating. The heating device comprises a heating unit (1), a temperature controller (2) and a rectifier (3), wherein a live wire L is connected with one end of the temperature controller (2); the other end of the temperature controller (2) is connected with the 1st end of the rectifier (3); the 4th end of the rectifier (3) is connected with one end of the heating unit (1); the other end of the heating unit (1) is connected with the 3rd end of the rectifier (3); and the 2nd end of the rectifier (3) is connected with a zero line N. The heating device provided by the invention has the advantages of reasonable design, and simple structure; direct current supply technology is adopted, the problems of leakage current of an electric heating system and electromagnetic radiation are simultaneously solved, the security of the electric heating system is improved, and the electric heating system is a development tendency of the electric heating system in future.

Description

Technical field: [0001] The invention relates to the technical field of electric heating, in particular to a geothermal heating device powered by direct current. Background technique: [0002] Electric geothermal heating has become one of the important heating methods in my country. It has many advantages such as convenient construction, simple control, convenient adjustment, energy saving, and maintenance-free, and is more and more valued and favored by people. Through patent retrieval, it is found that the patent requirements for electric heating technology are mostly concentrated on the research on the material, shape, and structure of heating elements (cables, electric heating films, etc.). For example: Patent Application No. 200610027098.5 discloses a nano-intelligent temperature control cable and its preparation method and a geothermal heating system using it; Patent Application No. 200910066661.3 discloses a geothermal cable; Geothermal heating system with rod-shaped...

AI Technical Summary

Problems solved by technology

[0003] At present, all electric heating systems use AC power supply. Due to the capacitive effect of the electrothermal film, leakage current will be generated, and the leakage current is relatively large, which is often greater than the operating current of the leakage protection device (the requirements for electrical equipment in my country must be within the load line of the equipment. There is a leakage protection device at the front end), which has certain potential safety hazards

In addition, since the heating system uses AC power supply, electromagnetic radiation problems will inevitably occur, and long-term use will also have a certain impact on human health

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