Abstract: An automatic grinder and a grinding method thereof. The grinder includes a control structure and at least one material container assembly. The control structure includes a driving assembly and a connecting structure connected to the driving assembly. The material container assembly includes a material container body (20), a grinding head (22) fixedly connected to the material container body (20), and a grinding sleeve (25) rotatably connected to the grinding head (22). A recess (201) is provided on the material container body (20), and the connecting structure is engaged with the recess (201). The grinding head (22) is fitted into the grinding sleeve (25), and the grinding head (22) and the grinding sleeve (25) define therebetween a material compartment (40) for accommodating a material. The driving assembly drives, via the connecting structure, the material container body (20) to rotate. The material container body (20) drives the grinding head (22) to rotate.

Abstract: An automatic grinder and a grinding method thereof. The grinder includes a control structure and at least one material container assembly. The control structure includes a driving assembly and a connecting structure connected thereto. The material container assembly includes a material container body (20), a grinding head (22) fixedly connected to the material container body (20), and a grinding sleeve (25) rotatably connected to the grinding head (22). A recess (201) is provided on the material container body (20), engaged with the connecting structure. The grinding head (22) is fitted into the grinding sleeve (25), defining therebetween a material compartment (40) for accommodating a material. The driving assembly drives the material container body (20) to rotate. The material container body (20) drives the grinding head (22) to rotate. The grinding head (22) moves relative to the grinding sleeve (25), such that the material therebetween is ground into powder.

Abstract: A thermal insulation backpack enabling a rapid reduction in temperature without removing a product arranged therein and achieving a thermal insulation effect, and an operation method thereof. The thermal insulation backpack comprises a main body (10) and one or more adapter assembly (30). The main body (10) is provided with a thermal insulation accommodation cavity (102) therein, and provided with a connection hole (101) in communication with the thermal insulation accommodation cavity (102). The adapter assembly (30) is inserted into the connection hole (101), and comprises a fixing frame, a sealing screen (32), and a reset assembly. An outer periphery of the sealing screen (32) is provided with a sealing strip (321) protruding outward. A connection recess (316) and a first through slot (312) are provided in the fixing frame. The first through slot (312) is connected to the thermal insulation accommodation cavity (102). The sealing screen (32) is connected to the reset assembly.

Abstract: A dual-purpose grinder and an operating method thereof. The grinder includes a material container assembly. The material container assembly includes a grinding head (12, 27) fixedly connected to a material container body (10, 20), and a grinding sleeve (15, 26) rotatably connected to the grinding head; the grinding head is fitted in the grinding sleeve, and the grinding head and the grinding sleeve define therebetween a material compartment for accommodating materials; and a connecting structure capable of being connected to an external power assembly is arranged at an upper end of the material container body. According to the dual-purpose grinder, the material container assembly can be individually used to enable manual grinding, the material container assembly can also be combined with the external power assembly to form an automatic grinder, the grinding head and the grinding sleeve move relative to each other by rotation of the material container body.

Abstract: An automatic grinder and a grinding method thereof. The grinder includes a control structure and at least one material container assembly. The control structure includes a driving assembly and a connecting structure connected thereto. The material container assembly includes a material container body (20), a grinding head (22) fixedly connected to the material container body (20), and a grinding sleeve (25) rotatably connected to the grinding head (22). A recess (201) is provided on the material container body (20), engaged with the connecting structure. The grinding head (22) is fitted into the grinding sleeve (25), defining therebetween a material compartment (40) for accommodating a material. The driving assembly drives the material container body (20) to rotate. The material container body (20) drives the grinding head (22) to rotate. The grinding head (22) moves relative to the grinding sleeve (25), such that the material therebetween is ground into powder.

Abstract: A synchronous rectifier driving method, a synchronous rectifier circuit and a switching power supply are provided, and the method includes: detecting an output current in a secondary winding of a transformer unit, and generating a first driving signal according to the output current; obtaining a protection signal according to a voltage signal of the secondary winding of the transformer unit in a synchronous rectifier circuit; correcting the first driving signal by using the obtained protection signal to obtain a second driving signal; and driving a rectifier in the synchronous rectifier circuit according to the second driving signal.

Abstract: A synchronous rectifier driving method, a synchronous rectifier circuit and a switching power supply are provided, and the method includes: detecting an output current in a secondary winding of a transformer unit, and generating a first driving signal according to the output current; obtaining a protection signal according to a voltage signal of the secondary winding of the transformer unit in a synchronous rectifier circuit; correcting the first driving signal by using the obtained protection signal to obtain a second driving signal; and driving a rectifier in the synchronous rectifier circuit according to the second driving signal.