Abstract: A ternary composite catalyst of diethylzinc and yttrium trifluoroacetate loaded on chitin for copolymerization of carbon dioxide, epoxy cyclohexane and ethylene oxide is provided. The ternary composite catalyst exhibits strong catalytic activity for the ternary copolymerization of carbon dioxide, cyclohexane oxide and ethylene oxide. A high molecular weight and content of ester chain is maintained. Conventional rare earth ternary catalysts leave residues in the polymer, and the polymer requires rinsing with hydrochloric acid. The ternary composite catalyst can be removed through filtration. The average molecular weight of the resulting polycarbonate is more than 100,000, and the ester chain content is more than 90%. The resulting polymer has a lower metal content. The ternary composite catalyst can be used in agricultural film, disposable packaging and other polymer materials.

Abstract: An air conditioner includes a housing having an air outlet chamber, an air treatment apparatus disposed in the housing, and an air guide mechanism movably disposed in the housing. A vent connecting the air outlet chamber with outside is formed at a sidewall of the air outlet chamber. The air treatment apparatus includes an air treatment unit and has an air inlet. The air guide mechanism is configured to connect an inner cavity of the air treatment unit with outside or isolate the inner cavity of the air treatment unit from outside. When the inner cavity of the air treatment unit is in communication with outside, air entering through the air inlet flows through the air treatment unit and into the air outlet chamber, and then flows out through the vent.

Abstract: Provided are an air purification device (100) and an air conditioner (1000). The air purification device (100) includes a housing (1), a filter module (2), and a plurality of power supply elements (3). The housing (1) has an accommodation cavity (11). The filter module (2) is disposed within the accommodation cavity (11) and has a plurality of electrical connectors (21) provided thereon and arranged at intervals in a first direction. The plurality of power supply elements (3) are arranged at intervals at the housing (1) in the first direction and have a one-to-one correspondence with the plurality of electrical connectors (21). Each of the plurality of power supply elements (3) has a plurality of power supply contacts (31). When the plurality of electrical connectors (21) is in contact with one of the plurality of power supply contacts (31) of each of the plurality of power supply elements (3), the power supply elements (3) is electrically connected to the electrical connectors (21).

Abstract: An air treatment apparatus and an air conditioner are provided. The air treatment apparatus has a housing and one or more air treatment devices. An airflow passage is formed in the housing. A mounting cavity is formed in the airflow passage. A side of the mounting cavity has a mounting opening. Multiple mounting portions are disposed in the mounting cavity. Two opposite sides of each of the mounting portions have a first sliding surface and a second sliding surface, respectively. At least one of the air treatment devices is drawably mounted on the mounting portions through the mounting opening and in slidable fit with the first sliding surface and the second sliding surface. Each of the air treatment device is mountable on one of the mounting portions.

Abstract: The invention relates to a flocking swab for biological sampling quantitatively and a method for making the same. One or two ends of the swab shaft form a loop by injection molding process. Flocking fiber is flocked into a layer on the surface of the loop by conventional electrostatic flocking process. By controlling the diameter of the loop frame, the diameter of the cylinder of the loop, and parameters of flocking fibers, a quantitative swab for biological sampling can be made. The swab disclosed in this invention can be used in quantitative sampling, has large sampling volume and securely attached swab tip. Moreover, it is safe and easy to use.