Variable frequency electromagnetic heating steam engine and scale detecting method

Abstract

The invention provides a variable frequency electromagnetic heating steam engine, which comprises a water storage tank, a radiator, a cooling water pump, a high-pressure water injection pump, a waterinlet pipe and a steam tank. One end of the water storage tank is connected with an external tap water pipe through a water inlet electromagnetic valve, and the other end of the water storage tank conveys cold water in the water storage tank to the water inlet pipe through the high-pressure water injection pump. A water outlet is formed in the upper end of the water inlet pipe. One or more electromagnetic induction heaters connected in parallel or in series are communicated between the water outlet and the steam tank. The variable frequency electromagnetic heating steam engine further comprises a frequency converter, a current detection device and a control board. The current detection device is used for collecting current signals of lines at an input end of the frequency converter and transmitting the current signals to the control board. The invention further provides a scale detecting method for variable frequency electromagnetic heating steam engine. Electromagnetic coils are energized to heat water, and the circulation cooling water is supplied to the radiator to dissipate work heat of the frequency converter; thus, the structure is reasonable, and energy saving and the consumption reduction are realized. Whether scale in an electromagnetic heating pipeline is accumulated to exceed the standard is judged by detecting the abnormality of an electromagnetic heating current value in real time.

Description

technical field [0001] The invention relates to the technical field of electromagnetic heating, in particular to a variable frequency electromagnetic heating steam engine and a scale detection method. Background technique [0002] Electromagnetic heating technology is to use the "eddy current" principle in physics to heat metal materials, that is, high-frequency alternating current generates alternating magnetic fields through electromagnetic coils. When a metal material is placed within the coverage of the magnetic field lines of the coil, the metal body is Alternating magnetic field cutting, the surface generates alternating current (ie eddy current) and heats up rapidly. Because the heating tube of the electromagnetic heating steam engine is soaked in water for a long time or exposed to water vapor, it is easy to scale and affect the heat exchange efficiency. However, to detect the scale in the electromagnetic heating pipeline, it is usually necessary to open the heating ...

AI Technical Summary

Problems solved by technology

Because the heating tube of the electromagnetic heating steam engine is soaked in water for a long time or exposed to water vapor, it is easy to scale and affect the heat exchange efficiency. However, to detect the scale in the electromagnetic heating pipeline, it is usually necessary to open the heating pipeline regularly for manual inspection, which is time-consuming and laborious. At the same time, it is easy Cause abnormal operation or damage to the equipment

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