source:power adapter Popular:adapter release time:2021-09-11 09:25:41 Article author:sznbone
Is the temperature safety problem of the power adapter?
1. Non-standard power plug
We rule household single-phase power plugs in two ways: pole grounding and pole-to-ground. The use of power plugs shown in the section should be able to avoid single-pole penetration. When a latch plug socket is charged with a socket, it cannot be used with other bolts. Visited. The inspection found that the appearance of the latch is long, and the risk of electric shock is added by the long latch, which is caused by the presence of the user during the cooperation process. In addition, the shape of the power plug does not meet the requirements of the more common plugs and sockets used in our country. It is incomplete, and it is very simple to cause electric shock.
2, product symbols are incomplete or non-standard
The label should include the symbol of the product that is correctly installed and correctly guides the important information of the user, so as to ensure the user's personal and industrial safety. After being used and eye-catching, the identification requirement label should not fall off. After normal use, it should be cleaned and the content should be clear and identifiable. The products sold require simplified Chinese symbols, which should include less information: the name of the manufacturer or distributor, trademark or identification symbol, type code or standard type, power supply nature, and additional power supply voltage scale. If the information is incomplete, and consumers are not guided correctly to use it, and some may even misuse and harm their cooperative electronic equipment, one question after another, my country’s symbol, title or trademark, type code or type standard.
3. Heating under normal operating conditions does not meet the requirements
The function of the power adapter is to convert some of the power consumed by the voltage requirement. This is due to the loss in the voltage conversion process. The electric energy in the three cooling modes is converted into heat energy by radiation, convection, and conduction. Some of the heat energy will be distributed. To the surrounding environment, another part of the self-absorbed heat, so the temperature of the power adapter rises. Insulation material method, if the internal temperature of the equipment rises to a certain temperature, it will cause the rapid aging of the insulation material, shorten the life test, and then cause the safety of the function to decrease. For such a power adapter, the normal operating temperature can only be controlled within a reasonable scale to ensure its safety and to perform normal operations.
Supervision and inspection found that under normal operating conditions for some commodities, the temperature of the printed circuit boards and transformer windings of the commodities is too high, which poses a great safety hazard. As a consumer, one should pay close attention to the temperature rise of the product. The simple way is to use the temperature rise of the test case of the product. In the case of the power adapter, the temperature difference between the ambient temperature does not exceed 60°C, even in the hot In summer, the ambient temperature reaches 35, and the shell temperature cannot exceed 95°C. If the temperature of the product rises too high, we should stop using it in time.
4. Products that are dangerous in short-circuit and overload safety functions
The output is short-circuited under the condition of short-circuit fault. Some capacitors or diodes will increase the internal loss of the power adapter rapidly, resulting in the rise of temperature rise in each part. The design and use of electronic circuits should ensure that under abnormal operation and fault conditions, the temperature rise of each part of the product cannot exceed the requirements of the rules, or even not make the surrounding products fire dangerous. The power adapter may be damaged under the fault condition, but you The function of the safety equipment cannot be degraded.
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