Miniature multipath electric fire disaster monitoring alarm

Abstract

The invention belongs to a minitype multi-path electric fire monitoring alarming device in the field of extinguishers, which is characterized in that: a monitoring alarming circuit is composed of a singlechip, a signal input circuit of a fire detector, an output control circuit of a relay and a power source control circuit, wherein, the signal input circuit of the fire detector, which is respectively connected with N zero-sequence current transformers, is connected with an A / D converting interface of the singlechip; N input ends of the output control circuit of the relay are respectively connected with the output ports of the singlechip, and the output ends of the output control circuit of the relay are respectively connected with a shunt tripping device of the relay; the power source control circuit is connected with a charge control port and a voltage detecting port of the singlechip. The minitype multi-path electric fire monitoring alarming device has reasonable design, can realize simultaneous and uninterrupted leakage current detection of multi-path power lines, can alarm by an acousto-optic way when the detected result exceeds a preset value, can set different running parameters according to the actual requirements of different users, and the application range of the device is extended.

Description

technical field [0001] The invention belongs to the field of fire-fighting equipment, in particular to a miniature multi-channel electrical fire monitoring alarm. Background technique [0002] With the rapid development of the national economy and the improvement of people's living standards year by year, the use of various electrical equipment and household appliances has increased sharply, and the number of electrical fire accidents has also increased sharply. Since the 1990s, electrical fires in many areas of the country have been close to 30% of the total number of fires, ranking among the forefront of various fires, causing huge losses to the national economy and people's lives and property. 80% of electrical fires are caused by building fires. Electrical factors are the primary factor causing building fires. This is due to the aging of cables and other reasons that cause excess current in the cables to leak out. When the leakage current reaches a certain value , it is...

AI Technical Summary

Problems solved by technology

Traditional electrical fire protection mainly adopts two protective measures: one is to add a fuse to the power line. When the current in the power line is too large, the fuse will be blown and the circuit will be cut off to prevent the power line from overheating and fire. The current cannot be detected and prevented; the second is to install some temperature sensors or smoke detectors in the building. When a fire occurs, the above sensors can detect it in time and give an alarm. This method is a remedial measure after the fire occurs

The above two protective measures for electrical fires do not detect and alarm the potential danger of leakage current in the power line, so they cannot meet the requirements of modern fire protection

In recent years, some electrical fire monitoring alarms that detect the leakage current of the power line and give an alarm when the leakage current exceeds the alarm value have appeared on the market. These electrical fire alarm equipment generally have the following problems: (1). The design is not good Reasonable: One alarm can only detect and alarm the leakage current of one power line, that is, one alarm can only detect the leakage current of one power line. If multiple alarms need to be detected, only multiple alarms can be installed, resulting in Improvement of equipment cost; (2). The operating parameters of the alarm are fixed and cannot be modified according to the actual situation of the power line, so its adaptability is narrow and cannot well meet the needs of various users; (3) ). Since the fire alarm is installed together with the circuit breaker and fire detector, the volume is very large, which makes the switch cabinet also increase; (4). The detected leakage current cannot be directly displayed to the user

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