Water heating blanket intrinsically safe control circuit

Abstract

The invention relates to a water heating blanket intrinsically safe control circuit. A DC voltage V+1 supplies power to a water level safety control circuit (6) for avoiding out-of-control ignition. The DC voltage line V+3 output by the water level safety control circuit (6) for avoiding out-of-control ignition supplies power to an anti-out-of-control water temperature controller (8) respectively.The two ends of a water temperature detector (7) are connected to the two input ends of the anti-out-of-control water temperature controller (8) respectively. The output of the water level safety control circuit (6) for avoiding out-of-control ignition or the anti-out-of-control water temperature controller (8) controls the G1 end of a protection switch (10). The output of the anti-out-of-controlwater temperature controller (8) drives a temperature control switch (9). The inlet and the outlet of the protection switch (10) are connected to power lines X1 and X2. The inlet and the outlet of the temperature control switch (9) are connected to power lines X2 and X3. The power of an electric water heater (5) is input by the power lines X4 and X3. The water heating blanket intrinsically safe control circuit can prevent out-of-control ignition during water shortage power outage, and ensures the intrinsically safe control.

Description

technical field [0001] The invention belongs to the field of safety control of water heating blankets or water heating blankets, and particularly relates to a device that can reliably and effectively obtain power-off protection under abnormal fault conditions, prevent water shortage protection functions from failing or run out of control and cannot be powered off, and avoid continuous water shortages. Finally, dry burning is formed and a fire accident is caused, ensuring that the water heating blanket or the water heating blanket must be a real and safe control circuit. Therefore, the present invention is abbreviated as: a water heating blanket real safety control circuit. [0002] The present invention can be used as a water-shortage and power-off protection safety control circuit for electric water heaters such as water heating blankets or circulating hot water control boxes for water heating blankets, electric water heaters for showers, electric heaters for tap water, publi...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to design or provide a control circuit that can reliably and effectively cut off the power supply when there is a lack of water even in an abnormal fault state, so as to ensure that electric water heater products (including water heating blankets or water heating blankets) must be truly safe; Solve the technical problems that the water shortage protection function of electric water heaters in the existing market fails or the power cannot be cut off when they are out of control, completely avoid fire accidents caused by dry burning after continuous water shortage, and completely eliminate safety hazards and defects

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