As the summer season approaches, Kaifeng is quickly transitioning into its "summer mode." The intensity of sunlight has noticeably increased, and with the blooming of poplar trees, the city is now filled with flying fluff that affects daily life. These tiny particles have made it harder for people to enjoy outdoor activities, prompting many to seek effective protection. As a result, masks that offer both sun protection and allergy prevention have become increasingly popular.
On May 6th, reporters visited several pharmacies along Yongjing Road, Hanxing Road, Jin'an Road, and Gongyuan Road. They noticed that disposable medical masks and cloth masks were prominently displayed in stores. At one pharmacy on Hanxing Road, two women were seen purchasing masks in bulk. One of them immediately put on a blue mask after checking out. Qiu, one of the customers, explained that she had been experiencing sneezing and an itchy nose while cycling to work recently. After consulting a doctor, she found out it was due to the airborne poplar fluff. “This kind of mask is lightweight and breathable. It helps block the fluff and also provides some sun protection,†she said. “Plus, it’s easy to throw away when you’re done.â€
Pharmacy staff confirmed that during the spring-to-summer transition, demand for disposable masks typically rises. “The main reason is the poplar fluff. Many people are allergic, so they wear masks to stay protected. Compared to cloth masks, disposable ones are more comfortable, hygienic, and convenient,†they added.
According to the reporter’s findings, poplar trees make up the majority of the city's greenery, accounting for about 90% of the forest reserves. From April to May each year, these trees release fluff during their fruiting period, which lasts roughly a month. This seasonal phenomenon has become a common concern for residents, further driving the demand for protective masks.
With the arrival of warmer weather and increasing pollen levels, it's clear that the need for such masks will continue to rise in the coming weeks. Whether for health or comfort, these masks are proving to be an essential part of daily life in Kaifeng.
Pneumatic Valve
Pneumatic valve is a kind of valve controlled by air pressure, which is widely used in industrial automation control system. Its main applications include the following aspects:
1. Fluid control: pneumatic valve can be used to control the flow and direction of liquid or gas, such as controlling the flow in the pipeline, exhaust gas emission, etc.
2. Pressure control: pneumatic valve can be used to control the pressure of fluid, such as controlling the pressure of compressed air, regulating the pressure in the hydraulic system, etc.
3. Temperature control: pneumatic valve can be used to control the temperature of fluid, such as the temperature of heating or cooling system.
4. Automatic control: pneumatic valve can be linked with sensors, PLC and other equipment to realize automatic control, such as automatic production lines, robots, etc.
5. Safety control: pneumatic valve can be used for safety control, such as controlling emergency stop, preventing overload, etc.
In general, pneumatic valve plays an important role in industrial automation control system, which can improve production efficiency, reduce costs, and ensure safety.
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