Xinrui self-recovery fuse in solar insecticidal lamps
According to the development of the existing solar insecticidal lamps and the analysis of the status quo, Xinrui Electronics engineers have developed a method for using solar self-recovering fuses (pptc) to quickly change the characteristics of solar energy insecticidal lamps, increasing and improving solar energy. The overcurrent protection capability of the insecticidal lamp, through the results of the current limiting test, proves that the designed application can quickly and effectively limit the short circuit current and protect the solar insecticidal lamp. This program has a good application prospect.
The function of the solar insecticidal lamp is to trap the pests in a variety of ways at the same time. The types of pests are large and large, and the number of pests can be greatly reduced. The natural enemies of the pests can be protected, and the resistance of the pests can be delayed. harm. Moreover, solar insecticidal lamps are low in cost and convenient to move. To reduce the pollution of the earth's environment and maintain ecological balance, it provides a new choice, providing powerful comprehensive physical management methods for crops with large amount of diseases and insect pests such as vegetables, fruit trees, rice, forests, tea, and cotton.
It has shown considerable ecological, economic and social benefits in pest control, and has a good prospect for practical promotion. It has opened up broad prospects for the production of pollution-free, high-quality agricultural products, ecological protection and green food development. At present, solar insecticidal lamps on the market have four functions of light control, rain control, time control and voltage protection. Solar insecticidal lamps are long-term work in the field, not only to experience the harsh environment of sun, rain, wind and rain, but also for some improper use of man-made, such as handling, installation or other reasons, very It is easy to cause the trap light to be short-circuited, damaged or broken. Since the trap light is installed on the outside, it is easy to cause damage to the trap light due to human or natural factors. If the trap light is damaged or broken, a short circuit is formed at the output end of the control panel, resulting in control. The power switching device of the board is burnt, causing damage to the control board. At this time, the battery generates a very large current discharge through the control board, causing permanent damage to the battery, the solar panel, and the control panel, which is a chain-chain reaction. Since the existing solar insecticidal lamp does not have the function of overcurrent protection, once the trap light is short-circuited (light damage, crushing, etc.), a very large current will be generated, causing burnout or damage of the control circuit and the battery, or even appearing. Some unsafe hidden dangers. It brings unnecessary losses and safety hazards to users, and also brings many after-sales services to manufacturers of solar insecticidal lamps.
Application principle and method: pptc is made by high-polymer, high-temperature, high-temperature, vulcanization reaction, after adding conductive particle materials, after special processing. At normal temperature, when the normal working current passes through the inside of the pptc thermistor, the high-density polymer and the conductive particle material are combined to form a crystal structure, and the pptc thermistor is in a low-resistance molecular state. When there is a short circuit or destructive large current at both ends of the pptc, the self-recovery fuse power consumption in the circuit loop starts to increase, and the square of the current increases. At this time, pptc generates a large amount of heat instantaneously, making the pptc internal. The temperature of the polymer polymer rises rapidly, causing rapid expansion. At the same time, the crystal becomes a gel, and the molecular chain of the conductive particles begins to break, thereby blocking the passage formed by the conductive particle material. At this time, the internal resistance of the pptc reaches KK Ω. Value.
Effectively limit short-circuit current or destructive high current through pptc, the circuit loop is open. At this time, pptc is in a high temperature and high resistance state. When the fault current is removed, the temperature of the internal material of the pptc polymer polymerization switch is lowered, the polymer polymer is recrystallized, the conductive particle material begins to conduct, and the entire working circuit returns to normal, achieving the purpose of protecting the solar insecticidal lamp. 3. Application effect: After experiment, it is proved that pptc is used in solar insecticidal circuit. When the trap light is damaged or short circuit occurs, pptc plays a good role in protecting the control circuit of solar insecticidal lamp. The control panel, battery and solar panel all play a protective role, so that the solar insecticidal lamp can be effectively improved in function, prolonging the service life of the solar insecticidal lamp, and increasing the price at the lowest cost (a few dollars). The overcurrent protection function of the solar insecticidal lamp also reduces the maintenance cost of the solar insecticidal lamp and increases the reliability and safety of the solar insecticidal lamp. 5. Conclusions: (1) An application method using pptc is proposed. (2) Effectively increase and improve overcurrent protection performance by connecting pptc self-recovery overcurrent protectors in the circuit. (3) The test proves that the solution proposed by this paper can solve the overcurrent protection of solar insecticidal lamps and has a good application prospect.