Shenzhen Jidiantong Industrial Co., Ltd.

The application of self-restoring fuses in solar insecticidal lamps
Based on the analysis of the development and current situation of existing solar insecticidal lamps, engineers from Jidentong Electronics have developed a self-restoring fuse using self-resetting fuses. The application method of rapid resistance change characteristics in solar insecticidal lamps increases and improves the overcurrent protection capability of solar insecticidal lamps. Through the current limiting test results, it is proved that the designed application solution can quickly and effectively limit short-circuit current and protect solar insecticidal lamps. lamp. This solution has good application prospects.
The function of solar insecticidal lamps is to trap pests in a variety of ways at the same time. There are many types and large quantities of trapped pests, which can greatly reduce the number of eggs dropped by pests. At the same time, it can also protect the natural enemies of pests and delay the occurrence of pesticide resistance. , harmless to humans and animals.
Moreover, solar insecticidal lamps are low in cost and easy to move. It provides a new option for reducing global environmental pollution and maintaining ecological balance, and provides a powerful comprehensive physical management method for vegetables, fruit trees, rice, forests, tea, cotton and other crops with large incidence of pests and diseases and frequent use of pesticides
It has shown considerable ecological, economic and social benefits in pest control, has good prospects for practical promotion, and opened up broad prospects for the production of pollution-free, high-quality agricultural products, ecological protection and the development of green food.
The solar insecticidal lamps currently on the market have four major functions: light control, rain control, time control, and voltage protection. Solar insecticidal lamps work in the field for a long time. Not only do they have to go through the harsh environment of sun, rain, wind and rain, but also the impact of improper human use such as transportation, installation or other reasons, it is very difficult to It is easy to cause the insect trap light to be short-circuited, damaged or broken.
Since the insect trap is installed externally, it is easy to be damaged due to the influence of man-made or natural factors. If the insect trap is damaged or broken, it will form at the output end of the control board. A short circuit causes the power switching device of the control panel to burn out, causing damage to the control panel. At this time, the battery generates a very large current discharge through the control panel, causing permanent damage to the battery, solar panel, and control panel. This is a chain chain. formula reaction.
Since the existing solar insecticidal lamps do not have the function of over-current protection, once the insect trap lamp is short-circuited (the lamp is damaged, broken, etc.), a very large current will be generated, causing the control circuit and battery to be burned or damage or even some unsafe hazards. It brings unnecessary losses and safety hazards to users, and also brings a lot of after-sales service expenses to the manufacturers of solar insecticidal lamps.
, Application Principles and Methods
It is made of high molecular polymer mixed with conductive particle materials under the conditions of high pressure, high temperature and vulcanization reaction, and processed through a special process. At room temperature, when normal operating current passes through the interior of the thermistor, the high-density polymer and conductive particle materials are combined together to form a crystalline structure. At this time, the thermistor is in a low-resistance molecular state.
When a short circuit or destructive large current occurs at both ends, the power consumption R of the self-restoring fuse connected in series in the circuit loop begins to increase, increasing according to the square value of the current. At this time, a large amount of heat is generated instantly, causing the internal high The temperature of the molecular polymer rises rapidly, causing rapid expansion. At the same time, it changes from crystallization to colloid. The molecular chain of the conductive particles begins to break, thereby blocking the path formed by the conductive particle material.
At this time, the internal resistance reaches a series value . It effectively limits short-circuit current or destructive large current, and the circuit loop is in a disconnected state. At this time, it is in a high temperature and high resistance state.
When the fault current is eliminated, the temperature of the internal material of the polymer polymer switch decreases, the polymer recrystallizes, the conductive particle material begins to conduct, and the entire working circuit returns to normal, achieving the purpose of protecting the solar insecticidal lamp.
Application diagram
Application effect
It has been proved through experiments that when used in solar insecticidal circuits, when the insect trap lamp is damaged or short-circuited, the control circuit of the solar insecticidal lamp will be affected. It has a very good protective effect, and also protects the control panel, battery and solar panel, which effectively improves the function of the solar insecticidal lamp and extends the service life of the solar insecticidal lamp.
At the lowest cost price (a few yuan), the overcurrent protection function of the solar insecticidal lamp is added, and the maintenance cost of the solar insecticidal lamp is also reduced, and the reliability and safety of the solar insecticidal lamp are increased.
, Conclusion
⑴ An application method is proposed.
⑵ By connecting a self-restoring overcurrent protector in series in the circuit, the overcurrent protection performance can be effectively increased and improved. ⑶ Tests have proven that the solution proposed in this article can solve the overcurrent protection of solar insecticidal lamps and has good application prospects.