Liquid heating method and liquid heating device of short circuit type and electromagnetic induction using a three-phase commercial frequency power

摘要

On the heating method and liquid heating device of short circuit type and electromagnetic induction using [challenge] the three-phase commercial frequency power. There is EI-shaped iron core [MEANS FOR SOLVING PROBLEMS] whole to form a three-phase closed magnetic circuit of one superimposed on the multi-layer silicon steel plates, the core legs of a three-of this EI-shaped iron core, three phase winding a primary coil, respectively The primary coil is formed. Sequentially represented U, V, in W respectively from left to right, and each three-phase primary winding, a star or delta (Y) connection and (Δ) connection, each phase of the three-phase primary coil, and third core The phase primary coil, the whole is enclosed in a metal case, the space of the metal casing, it is a closed structure insulating packing is filled. The installed along the three-phase closed magnetic circuit, by forming a secondary resistance of each phase and surrounds the primary coil 2 of each phase and the iron core, the metal case is made to the main heating element of the liquid heating apparatus , and, heat dissipation and body protection case of three-phase primary coil and iron core also has become. In operation, it induces a high current in the secondary side metal rings each phase of the metal case, is turned by using a metal case of the same, the secondary metal ring of each phase, and a third short circuit between the phases large current is generated in the short circuit phase, the metal case is heated rapidly by the high current of the two, is conducted to the surrounding liquid in the metal case, heat of the metal case, the secondary metal ring each phase vector sum of the short circuit at three phases formed becomes zero, the metal case is safe becomes zero potential. There is a reliable and safe operation and power factor [effect] output is greatly improved, cost and become significantly cheaper