Abstract: A control circuit for an isolated power supply is disclosed, the control circuit includes a secondary-side drive signal generator, a secondary-side transistor switch turn-off detector and a primary-side control signal generator. The primary-side control signal generator is configured to: determine a second turn-on instant referring to an turn-off instant of the secondary-side synchronous rectification transistor from the turn-off acknowledgement signal; determine a first turn-on instant referring to a supposed turn-on instant for the primary-side transistor switch from the feedback signal of the output voltage of the isolated power supply; and determine the turn-on instant for the primary-side transistor switch from the second turn-on instant or the first turn-on instant whichever is later, and responsively generate the primary-side transistor switch control signal.

Abstract: A product display method and device are provided in embodiments of the disclosure is provided in the disclosure, which relates to the technical field of computer processing. The method includes: obtaining, in a first application, at least one product object information corresponding to at least one live room; in response to a display policy being satisfied, displaying a second interface in a first interface of the first application, the second interface including information of the live room and the product object information; and in response to detecting a first trigger signal for the second interface, displaying a detailed information browsing interface corresponding to the product object information, and/or displaying a live room viewing interface, the livestreaming viewing interface including the product object information.

Abstract: An impeller apparatus includes a housing, an impeller, and a heat generation member. The housing includes an air duct formed in the housing. The air duct includes a first air duct and a second air duct successively connected to each other. The second air duct has a non-blocking area. The impeller is arranged in the first air duct. The heat generation member is rotatably arranged in the second air duct and has a blocking state and a non-blocking state. In the blocking state, the heat generation member blocks the second air duct, in the non-blocking state, the heat generation member is accommodated in the non-blocking area and does not block the second air duct.

Abstract: An impeller apparatus includes a housing, an impeller, and a heat generation member. The housing includes an air duct formed in the housing. The air duct includes a first air duct and a second air duct successively connected to each other. The second air duct has a non-blocking area. The impeller is arranged in the first air duct. The heat generation member is rotatably arranged in the second air duct and has a blocking state and a non-blocking state. In the blocking state, the heat generation member blocks the second air duct, in the non-blocking state, the heat generation member is accommodated in the non-blocking area and does not block the second air duct.

Abstract: Provided are a box cover, a water box, a humidification apparatus, and an air blowing device, said box cover including a cover body and a mist outlet passageway running through the cover body, the cover body and the mist outlet passageway are integrally formed. By means of integrally forming the cover body and the mist outlet passageway, and significant reduction of the time required for assembly of a mist outlet tube, while also avoiding the occurrence of water leakage at the joint of the mist outlet tube.