How to ensure the safety of the power adapter temperature?

The Power Adapter is a tool used in many electrical appliances, but in recent years, it is not uncommon for the power adapter to cause fires. How to ensure the safety of the temperature of the power adapter?

How to ensure the safety of the power adapter temperature?

1. Non-standard power plug

We rule the household single-phase power supply plug pole ground and pole and ground two ways, the use of the power plug shown in should be able to avoid unipolar stabbing, when a latch plug socket live plug sleeve cooperation of other bolts is not accessible. Viewing found that the appearance of the latch is long, the latch is too long and the danger of electric shock is added in the cooperative process by the presence of the user. In addition, the shape of the power plug does not conform to the more common in our country use of plug socket demand is incomplete, it very simple leads to electric shock.

2. Commodity symbols are incomplete or non-standard

Labels should include the correct installation, the correct guidance of the user's important information to indicate the commodity symbol, in order to ensure the user's personal and industrial safety of one of the fundamental ways. After use, eye-catching, identification requirements label should not fall, after normal use, should be cleaned and the content is clear. Goods for sale need a simplified Chinese symbol, which should contain less information such as manufacturer's or distributor's title, trademark or identification symbol, type code or standard type, power supply nature, additional power supply voltage size. If the information is incomplete and does not guide consumers to use it correctly, some will even misuse and endanger their cooperative electronic equipment, a question together, the symbol of our country, title or trademark, type code or type standard.

3. Heating under normal operating conditions does not meet the demand

The role of the power adapter is to transform the voltage needs to consume some of the power, this is due to the loss of the voltage transformation process, by radiation, convection, conduction, three cooling mode of electric energy is converted into heat energy, some of the heat will be distributed to the surrounding environment, self-absorption of the other some of the heat, so the temperature of the power adapter rises. Heat insulation material method, the internal temperature of the equipment increases to a certain temperature will cause the rapid aging of the insulation material, shorten the life of the test, and then cause the function to decline safety. Such a power adapter, the normal operating temperature can only be controlled in a reasonable scale, in order to ensure its safety, ability to work normally.

It is found that under normal operation conditions, the temperature of printed circuit boards and transformer windings of some commodities is too high, which poses great safety risks. As consumers, we should pay close attention to the temperature rise of the product. A simple way is to use the temperature rise of the test housing of the product. In the case of the power adapter, the temperature difference between the ambient temperatures does not exceed 60°C. We should stop using it in time.

4, in short circuit and overload safety function of dangerous goods

Under the condition of short-circuit fault, the output short-circuit, capacitors or other diodes, the internal loss of the power adapter increases sharply, resulting in the rise of temperature in each. Electronic circuit design and use, should ensure that in abnormal operation and fault conditions, the temperature of the product can not exceed the requirements of the rules, and even can not make the surrounding items fire risk, Power Adapters may be damaged under the fault condition, but you can not reduce the function of the safety equipment.

The key component of a power transformer is a safe barrier between the main circuit and the auxiliary circuit of the power adapter. Therefore, the transformer skeleton material and the thickness of the insulation layer have strict requirements to meet the needs of strengthening insulation between primary and secondary. The temperature rise of transformer winding of a single commodity is too high in the fault condition, resulting in bone ablation.