Abstract: A display substrate and a display device. A first opening region includes a first opening and a first opening peripheral region surrounding the first opening; a display region surrounds the first opening region the first signal lines extend along the first direction; the second signal lines extend along a second direction; the second signal lines pass through the first opening peripheral region along the second direction, each second signal line includes a longitudinal winding portion in the first opening peripheral region; the longitudinal winding portion partially surrounds the first opening; the longitudinal winding portion closest to the first opening among longitudinal winding portion of the plurality of second signal lines is an edge longitudinal winding portion, and the first floating electrode is in a same layer as the edge longitudinal winding portion and is at a side of the edge longitudinal winding portion close to the first opening.

Abstract: A control method includes: setting a set water temperature for each subunit, acquiring a total outlet water temperature; according to an operating mode of the unit, judging whether the total outlet water temperature meets a first unloading condition, and if so, controlling the subunit with the lowest operating frequency to perform an unloading action; acquiring the total outlet water temperature in real time, and judging whether the total outlet water temperature meets a second unloading condition, and if so, controlling the subunit with the lowest operating frequency to perform the unloading action; judging whether the total outlet water temperature meets a start-up loading condition in real time, and if so, controlling the first subunit with the shortest accumulative operating time of the subunits performing the unloading action to perform a start-up loading action; and judging whether the total outlet water temperature meets the start-up loading condition every a specified time.

Abstract: A control device and method for a DC fan of an air source heat pump system/air conditioning system is described. The method comprises: presetting a heat exchanger to be on an evaporating side and on a condensing side, respectively, and presetting a dataset of preset target pressure values at different ambient temperatures; judging whether the DC fan is on the evaporating side or on the condensing side; according to a judgment result of a judgment module, an ambient temperature of an environment in which the DC fan operates and the dataset of preset target pressure values, obtaining a preset target pressure value of the heat exchanger corresponding in position to the DC fan at the ambient temperature; detecting an actual pressure Pa of the heat exchanger; and adjusting the speed of the DC fan according to a comparison result between the actual pressure Pa and the preset target pressure value.

Abstract: A control method and control device for an electronic expansion valve and an air source heat pump system. The control method includes obtaining a frequency of a compressor, calculating a target exhaust gas temperature according to the frequency, and controlling an opening degree of the electronic expansion valve according to the target exhaust gas temperature; and obtaining an exhaust gas superheat degree of the compressor, and correcting the opening degree of the electronic expansion valve according to a comparison result between the exhaust gas superheat degree and a preset superheat degree value, so that the exhaust gas superheat degree meets superheat degree requirements.