Electric heating device and fault detection method and control device thereof

Abstract

The invention relates to an electric heating device and a fault detection method and a control device thereof; the electric heating device comprises an electric heating loop composed of three heatingpipes which are connected in a star shape, a current detection module, heating detection modules, a temperature detection module and a processing module, wherein one ends of the three heating pipes are connected to a common end in a star shape, and the other ends are electrically connected with U, V and W three-phase access ends of an alternating current power supply through relays, and the commonend is electrically connected with an N end through a fourth relay; the current detection module comprises a current detection element which is coupled between the common end and the N end; the threegroups of heating detection modules are used for carrying out fault detection on heating tubes and relays connected with the heating tubes, and the heating detection modules output detection voltagesignals of different voltage grades under different working modes and different fault conditions; and the temperature detection module is used for detecting the heating temperature of the electric heating loop. According to the electric heating device, the fault component can be quickly and accurately judged, an alarm signal is sent to a user in time, timely maintenance is facilitated, and higherloss of a customer caused by the situation that the fault maintenance is not timely carried out can be avoided.

Description

technical field [0001] The invention relates to the technical field of electric heating equipment, in particular to an electric heating device, a fault detection method and a control device thereof. Background technique [0002] The existing three-phase electric heating adopts three or more heating tubes in star or delta connection, and when heating, multiple heating tubes work at the same time. When the temperature reaches a critical value or only heat preservation is required, multiple heating tubes will operate at the same time, causing excessive loss and shortening the life of the heating tubes. [0003] The basic control circuit of electric heating adopts thermistor, relay, and heating tube. When the thermistor is abnormal or the relay is stuck in the current electric heating equipment, the controlled heating tube will continue to heat, which will cause the heating tube to burn or cause a fire. Security risks [0004] Most of the three-phase electric heating equipment...

AI Technical Summary

Problems solved by technology

When the temperature reaches a critical value or only heat preservation is required, multiple heating tubes will also operate at the same time, causing excessive loss and shortening the life of the heating tubes

[0003] The basic control circuit of electric heating adopts thermistor, relay, and heating tube. When the thermistor is abnormal or the relay is stuck in the current electric heating equipment, the controlled heating tube will continue to heat, which will cause the heating tube to burn or cause a fire. Securi

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