Application scheme of PPTC in humidifier

Application scheme in humidifier
With the rapid development of business society, various types of modern office spaces are increasing day by day. In order to realize their dreams, a group of white-collar workers are under intense and busy work tasks and face computers all day long. , we spend more and more time in crowded offices. How to effectively improve working conditions, create a warm and comfortable office environment, and improve work efficiency? This has become a question that many managers often think about.
Of course, the first thing we thought of was to place some green plants in the office to adjust the atmosphere. However, as time went by, we unfortunately found that the air quality inside the office was not high, and we relied on the fresh air brought by the air conditioner. The air is too dry and the human body feels uncomfortable. Because the humidity environment for human health is:.
So, we naturally think of putting a humidifier in the room. Within the appropriate humidity range: human body physiology and thinking are in good condition, and work and rest have better effects. Healthy humidity can not only inhibit the growth and spread of germs, but also improve immunity.
The humidifier uses clean tap water to flow into the water tank through the water inlet pipe. When the humidifier is working, the circulating water pump circulates the water in the water pipe. The water is transported to the water distributor at the top of the humidifier, which evenly distributes the water to the evaporation wet film. The water penetrates downward from the top of the evaporation wet film and is absorbed by the evaporation wet film to form a uniform water film. When the dry air is blown by the fan When it is sucked into the humidifier, part of the water comes into contact with dry air and absorbs heat to vaporize, making the air moist (humidity increases).
It can be seen that humidifiers usually work for a long time. Due to the humid environment inside, it is extremely easy to short-circuit and cause malfunctions. Therefore, it is more important to design a resettable fuse for the humidifier.
As a polymer material, the recoverable fuse relies on Joule's law =^*R* to operate. It can be seen that the heat generated inside it is proportional to the square of the current flowing through it. When the current increases a little, the internal heat will increase by The relationship increases sharply with the square of the current.
When the humidifier is working normally, the accumulated heat is not enough to cause action, so false protection will not occur. Once the load is short-circuited, the current at this moment is several times the normal operating current. As long as the current flowing is normal The protection can be activated at times of the operating current.
After protection, manual intervention is required to cut off the power, so that the heat can be dissipated and then it can be restored to the factory low resistance value. If the current is not cut off, a small residual current will always flow through to maintain the high resistance value, ensuring User’s personal safety.
Since there is no distinction between polarity, it only needs to be connected in series in the load circuit. It is not limited by space, and the installation location is extremely flexible and convenient, so it has been recognized by more and more customers. (Recommended reading: Application of self-restoring fuse in lightning protection of R communication port)