With the rise in living standards and the growing focus on quality of life, air purifiers and water purifiers have become essential for many households. Especially in urban areas, where air quality is a major concern, air purifiers play a crucial role in maintaining a healthy living environment. However, not all air purifiers are equally effective when it comes to air purification.
A recent report from the Shanghai Municipal Bureau of Quality and Technical Supervision tested 39 air purifier models available in the market. While all products passed the safety tests, several failed to meet the required performance standards, particularly in terms of formaldehyde and toluene removal efficiency.
Several well-known brands, including Perry, Amami, TOSOT, and NATURE CLEAN, had products that did not meet the expected levels for formaldehyde purification. Similarly, some models from Daikin, Changhong CHiQ, Irene, and NATURE CLEAN struggled with toluene purification energy efficiency. This raises concerns about the actual effectiveness of these devices, especially when compared to their advertised claims.
One example is the RéFinAIR AP-C120A model, which was labeled as suitable for rooms up to 30 square meters, but testing revealed it only worked effectively in spaces as small as 8 square meters. This discrepancy highlights the importance of verifying product specifications before purchasing.
In addition, the purification energy efficiency — a measure of how much clean air a unit can produce — is a key factor in determining the performance and energy savings of an air purifier. Several models, such as F200, KJZ-280, KJ200F-A01, and AC-L35GG, fell short of the required energy efficiency standards for both formaldehyde and toluene removal.
For instance, the Perry KJZ-280 model claimed a 95% formaldehyde removal rate, but the actual measured efficiency was just 14%. This gap between marketing and real-world performance can mislead consumers and undermine trust in the industry.
Following the release of the test results, reporters reached out to several companies, but responses were limited. Some companies said they were still investigating, while others denied any knowledge of the issue. Notably, the unqualified Perry KJZ-280 model remained on sale online, with misleading claims about its performance.
Industry experts suggest that manufacturers should take responsibility by improving product testing and ensuring transparency. As the market continues to evolve, there is a clear demand for more reliable and efficient air purification solutions, especially in newly renovated homes where harmful gases like formaldehyde are common.
At the AWE exhibition, health-focused appliances remain a hot topic, with air purifiers continuing to draw attention. Experts emphasize the importance of choosing products that are not only effective but also safe, energy-efficient, and cost-effective.
As the industry matures, it’s expected that more rational competition and innovation will drive better quality and consumer confidence. The two net products — air purifiers and water purifiers — are now seen as new growth opportunities for the Chinese home appliance market, offering a promising future for healthier living.
Power Inverter
First, basic concepts
A Power Inverter is a power electronic device whose primary function is to convert direct current (DC) to alternating current (AC). This conversion is critical in a variety of application scenarios, especially where DC power (such as solar panels, battery packs, etc.) needs to be converted to AC power for use by household appliances, industrial equipment, or power systems.
Second, the working principle
The inverter is quickly switched through internal electronic switching devices (such as MOSFETs, IGBTs, etc.) to produce alternating current close to sine waves. These switching devices operate according to specific control strategies to ensure that the output AC has a stable voltage, frequency and waveform quality.
3. Key parameters
The performance of the inverter can be evaluated by the following key parameters:
Rated power: The maximum power that the inverter can continuously output.
Conversion efficiency: The proportion of energy lost during the conversion of direct current to alternating current by the inverter.
Output voltage/frequency: The voltage and frequency of the AC output by the inverter.
Waveform distortion: The degree of difference between the inverter output waveform and the standard sine wave.
Protection function: inverter built-in overload protection, short circuit protection, overtemperature protection and other safety functions.
Solar system inverter, solar power inverter, DC power inverter
Foshan Keylewatt Technology Co., LTD , https://www.klwenergy.com