Abstract: Provided are a method and apparatus for determining a blockage of a filter of a clothes dryer and a clothes dryer. The clothes dryer includes a motor. The method includes following steps. An actual rotational speed of the motor is acquired, and an electrical parameter corresponding to a rotational speed range to which the actual rotational speed belongs is determined as a first threshold corresponding to the actual rotational speed; an actual clothes volume in the clothes dryer is acquired, and the first threshold is corrected according to a correction coefficient corresponding to a clothes volume range to which the actual clothes volume belongs so that a second threshold is obtained; and an actual electrical parameter of the motor is acquired, and when it is detected that the actual electrical parameter is less than the second threshold, it is determined that the filter of the clothes dryer is blocked.

Abstract: A fly ash-based fire-prevention and extinguishing material with carbon dioxide mineralized and stored, and a preparation method thereof are provided. The preparation method includes: separately weighing 100 parts to 120 parts of water, 1 part to 3 parts of a solid strong alkali, and 20 parts to 40 parts of a fly ash as raw materials, pouring the raw materials into a reactor successively to obtain a resulting mixture, and stirring the resulting mixture at a high rotational speed; adding 10 parts to 20 parts of a solubilizing agent to the reactor, sealing the reactor, introducing carbon dioxide to the reactor at room temperature to maintain a carbon dioxide pressure to obtain a resulting slurry, and stirring the resulting slurry at a high rotational speed; and further introducing carbon dioxide into the reactor to increase the carbon dioxide pressure, and stirring the resulting slurry at a low rotational speed.

Abstract: A control method for a clothes drying device includes: a load determination stage: determining the size of a load; and a drying stage: on the basis of the size of the load, selectively controlling a drying drum to rotate clockwise and counterclockwise alternately or controlling the drying stage to at least operate for a first preset time. In the embodiments, targeted control can be carried out on different loads: during the drying of a large load by controlling a drying drum to rotate clockwise and counterclockwise alternately, the load is effectively prevented from being knotted and twisted; and during the drying of a small load, the phenomenon of uneven drying of mixed loads is avoided by means of prolonging the drying time.

Abstract: A control method for a clothes drying apparatus that aims to solve the problem of a load being prone to entangling when an existing clothes drying apparatus is used for drying a large load. For this purpose, the control method for a clothes drying apparatus includes: determining the size of a load in a load determining stage; and when the load is a large load, controlling a drying drum to rotate unidirectionally in a first heating stage, and controlling the drying drum to alternately rotate normally and reversely in a second heating stage. Accordingly, a drying effect can be guaranteed while the load is effectively prevented from being knotted and entangled, and the drying time is shortened.