Recently, the Chongqing Municipal Administration of Industry and Commerce monitored the quality of room air conditioners in the circulation area. After being commissioned by Chongqing Electronic and Electrical Products Quality Supervision and Inspection Station, there were 3 groups of samples that failed. The main unqualified items found in the monitoring were energy efficiency ratios. According to reports, the energy efficiency ratio is the ratio of the cooling capacity to the effective input power when the air conditioner is performing cooling operation under rated working conditions and specified conditions, reflecting the actual working efficiency of the air conditioner. Energy-efficient air conditioners are energy-efficient, and air conditioners with low energy efficiency ratios waste resources. The industry and commerce department reminds consumers to pay attention to the following points when purchasing a room air conditioner: check whether it has a 3G certification mark, and the 3G mark is generally attached to the product body or printed on the product nameplate. Check the energy efficiency label for the energy efficiency rating, cooling capacity, power and energy efficiency ratio of the model. The energy efficiency rating is a grading method that indicates the difference in energy efficiency of the room air conditioner product. According to the "GB12021.3-2010 room air conditioner energy efficiency limit value and energy efficiency rating", the commonly used household room air conditioner energy efficiency rating It is three levels of 1, 2, and 3, and level 1 indicates the highest energy efficiency. When purchasing air conditioner products, the capacity of selecting an air conditioner is generally calculated according to the cooling capacity of 200 W per square meter of the housing area. Usually, a room of about 10 square meters, can use 2500W cooling wall-mounted air conditioner; more than 30 square meters of living room or room, need to use more than 5000W cooling floor-standing air conditioner. At the same time, it is necessary to consider the layout of the room, the degree of openness, the intensity of the sun's illumination, the ventilation, the number of personnel, etc., such as connecting with other places, or the space where the sun is shining strongly, the air conditioner with a larger cooling capacity should be purchased. Zirconium ceramics are white in color and yellow or gray when containing impurities. They generally contain HfO2 and are not easily separated. There are three crystal states of pure ZrO2 under normal pressure. The production of zirconia ceramics requires the preparation of powders with high purity, good dispersion, ultrafine particles and narrow particle size distribution. There are many preparation methods for zirconia ultrafine powders. The purification of zirconia mainly includes chlorination and thermal decomposition, and alkali metals. Oxidative decomposition method, lime melting method, plasma arc method, precipitation method, colloid method, hydrolysis method, spray pyrolysis method, and the like. Zirconia Ceramics,Silicon Nitride Ceramic Roller,Zirconia Ceramics Processing,Zirconia Ceramic Parts Dongguan Haikun New Material Co., Ltd. , https://www.hkceram.com