Automobile short-circuit protection, indication and alarm device

Abstract

The invention relates to an automobile short-circuit protection, indication and alarm device. The invention provides an automobile short-circuit protection, indication and alarm device which can be connected on the original circuit of the automobile, is convenient to use, and can not only effectively protect the electric parts of the automobile but also sound and displace on a screen to indicate the fault of the automobile. The automobile short-circuit protection, indication and alarm device comprises a short-circuit protection device, an indication device and an alarm device, wherein the short-circuit protection device comprises a plurality of short-circuit protection circuits which are connected in parallel; the short-circuit protection device is connected with the indication device which comprises a plurality of indication circuits connected in parallel; and the indication device is connected with the alarm device through a resistor R. The automobile short-circuit protection, indication and alarm device is convenient to connect and can be connected onto the parts of the original circuit of the automobile. Through the indication device and the alarm device, in the case of short circuit or big leakage fault, the faulted circuit can be powered off and at the same time a voice alarm can be given, and the name of the faulted circuit can be precisely displayed.

Description

technical field [0001] The invention relates to an automobile circuit short circuit protection and indication alarm device. Background technique [0002] Cars have become an indispensable means of transportation for people in today's society. Now the vast majority of drivers have only obtained a driver's license after one to three months of assault training. The fault alarm device does not have the function of directly prompting which circuit of the car has a problem. When a fault occurs in a car circuit, it is not known where the fault is, let alone what countermeasures to take. During the driving process of the car, due to the influence of many factors such as hot weather, rainy and snowy weather, complex road conditions, and frequent temperature changes, the car circuit is prone to short-circuit or leakage faults, which may cause spontaneous combustion of the car from time to time. However, in off-the-shelf automotive circuits, circuit protection devices are rarely used...

AI Technical Summary

Problems solved by technology

During the driving process of the car, due to the influence of many factors such as hot weather, rainy and snowy weather, complex road conditions, and frequent temperature changes, the car circuit is prone to short-circuit or leakage faults, which may cause spontaneous combustion of the car from time to time. However, in off-the-shelf automotive circuits, circuit protection devices are rarely used, and electronic protection devices are even less used. Moreover, in existing electronic protection devices, a resistor (called a sampling resistor) is added between the consumer and the ground terminal. Resistance) to obtain the sampling voltage, when the current in the circuit is abnormal, it will cause the abnormal sampling voltage, make the protection device work and cut off the power supply, and achieve the method of protecting electrical appliances

In actual repairs, it has been found that most of the short-circuit or leakage faults in automobile circuits are caused by the grounding of the positive terminal of the power supply——the wire between the output terminal of the fuse and the electrical appliance is damaged. At this time, the sampling resistor does not work at all, causing the protection device fail

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