In 2016, China experienced eight large-scale episodes of moderate to severe smog, a threefold reduction compared to 2015. Although overall air pollution control has shown some progress in recent years, the Beijing-Tianjin-Hebei region remains one of the most polluted areas in the country. According to the *Urban Blue Book: China Urban Development Report No. 10*, published by the Institute of Urban Development and Environment of the Chinese Academy of Social Sciences, the China Urban Economics Association, and the Social Science Literature Publishing House, this issue continues to be a major concern.
The report highlights that from 2013 to 2016, cities like Shijiazhuang, Tangshan, Baoding, Hengshui, Xingtai, and Handan in Hebei Province consistently ranked among the top ten for poor air quality. Other cities such as Shenyang, Tianjin, Taiyuan, Xi’an, Zhengzhou, and Jinan also appeared on the list, indicating widespread air quality issues across northern China.
Air pollution has become a persistent problem affecting public health, prompting many households to invest in air purification devices. Air purifiers, also known as air cleaners or purifiers, are designed to remove various pollutants from the air, including PM2.5, dust, pollen, odors, formaldehyde, bacteria, and allergens. These devices play an essential role in improving indoor air quality and ensuring a healthier living environment.
When it comes to choosing a reliable air purifier brand, several options stand out for their performance and innovation.
**Ai Jisen Air Purifier** is a leading high-end brand in the industry, often referred to as the "father of air purifiers." With over 30 years of experience, its fifth-generation ATP-HEPA antibacterial peptide technology has set new standards in the market. Ai Jisen currently accounts for 40% of air purifier sales in China. Each product undergoes 36 rigorous inspection procedures, ensuring top-quality performance and durability.
**VOV Air Purifier** focuses on tackling two major pollutants in China: PM2.5 and formaldehyde. Its KJ600G-V1 model features twin-turbo technology and a high-efficiency HEPA filter, capable of cleaning up to 600m³/h of air. This powerful unit can effectively clean spaces up to 72 square meters and includes a five-layer filtration system that captures particles as small as 0.05 microns. It also features real-time PM2.5 monitoring and a four-color air quality indicator for easy tracking.
**Ivy Tree Air Purifier** is part of Qingtengshu Technology, which specializes in smart home solutions. The company aims to provide healthier, smarter, and more eco-friendly living environments through innovative technologies. Their air purifiers integrate smart features with advanced filtration systems, offering users a seamless and intelligent air purification experience.
**Philips Air Purifier** is a global leader in home appliances, known for its long-standing expertise in air purification. With nearly 70 years of research and development, Philips has built a strong reputation for reliability and performance. Its products combine advanced purification technology with user-friendly design, making them a popular choice among consumers worldwide.
**Xiaomi Air Purifier** has gained popularity in China due to its sleek design, affordability, and strong brand presence. Xiaomi's air purifier offers a balance between style and functionality, making it a favorite among tech-savvy users. Its intuitive interface and efficient performance have helped establish Xiaomi as a key player in the domestic air purifier market.
With the increasing awareness of air quality issues, investing in a high-quality air purifier has become more important than ever. Whether you're looking for a premium brand like Ai Jisen or a budget-friendly option like Xiaomi, there’s a wide range of choices available to suit different needs and preferences.
Dual Band Router Module
Dual-band WiFi module refers to the WiFi module that supports both 2.4GHZ and 5GHz bands. The dual-band WiFi module can operate in the 5Ghz band, which is much cleaner and can easily avoid interfering with each other. The advantage of 2.4G is that it has good ability to penetrate the wall, and the disadvantage is that it is easy to be disturbed. The advantages of 5G are strong anti-interference ability, wide band width, high throughput rate, and strong scalability, but the disadvantage is that 5G is only suitable for indoor small-range coverage and outdoor bridge, and the attenuation effect of various obstacles on it is much larger than 2.4g.
Dual-band WiFi module has a stronger and more stable Wifi wireless signal, higher transmission speed, and can make wireless devices more power-saving, to meet the future high-definition and big data wireless transmission needs.
When selecting a dual-frequency WiFi module, we should pay attention to these parameters of the WiFi module: size, package, frequency range, data rate, transmission rate, transmission distance, communication interface, power supply voltage, antenna interface, etc.
Dual frequency WiFi module can well meet the functional needs of users, increase the competitiveness of the product, while the WiFi module is easy to use, can shorten the user product development cycle, speed up the product market! Users can make choices according to actual needs!
Choosing a dual-band WiFi module may need to pay attention to the following points:
(1) Consider the transmission power of the dual-frequency WiFi module
The transmitting power of the WIFI module is generally about 18dBm, and the transmitting power of the high-power WIFI module is about 28dBm.
(2) Transmission rate
Consider whether the dual-band WiFi module supports MIMO technology (that is, allows multiple antennas to send and receive multiple spatial streams simultaneously)
(3) Consider the application interface that dual-band WiFi modules can provide, which is also very important.
(4) According to the requirements of the application scenario to choose the dual-band WiFi module, not the higher the configuration, the better, the application is good, excess waste!
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