Abstract: The present disclosure provides a display panel including a plurality of pixel units and a plurality of common electrode line. The pixel units include a color resist block, the color resist block includes a first opening, each of the common electrode lines includes a first segment and a second segment that are arranged at intervals and respectively located on opposite sides of the first opening, the first segment and the second segment are electrically connected through a first connecting line, and an orthographic projection of the first connecting line on the base substrate does not coincide with an orthographic projection of the first opening on the base substrate.

Abstract: The present invention belongs to the technical field of energy conversion devices, which provides an rGO-PEI/PVDF pyroelectric thin film, and the method for preparing the film, as well as a self-energized bracelet produced based on such film, which utilizes the reduced graphite oxide after modified by polyethyleneimine (PEI) (rGO-PEI) as photothermal conversion material, and the silver-plated polarized polyvinylidene fluoride (PVDF) film as pyroelectric conversion material. The rGO-PEI photothermal material is fixed to the surface of the PVDF through a transparent film, and prepare the self-energized bracelet based on it. The obtained bracelet has an output power of up to 21.

Abstract: A variable refrigerant volume system includes: a compressor; a four-way valve; an indoor unit; a liquid tube, the first end thereof being connected to the indoor unit, the second end thereof being connected to the third valve port of the four-way valve, and a condenser being provided on the liquid tube; a low pressure air pipe, the first end thereof being connected to the indoor unit, and the second end thereof being connected to the fourth valve port of the four-way valve; a refrigerant adjustment tank, the first port thereof being connected to the liquid tube, the second port thereof being connected to the low pressure air pipe, and the third port thereof optionally communicating with the liquid tube or the low pressure air pipe.

Abstract: A variable refrigerant volume system and control method thereof. The variable refrigerant volume system comprises: a compressor (1); a four-way valve (19); an indoor unit; a liquid tube (22), the first end thereof being connected to the indoor unit, the second end thereof being connected to the third valve port of the four-way valve (19), and a condenser (18) being provided on the liquid tube (22); a low pressure air pipe (23), the first end thereof being connected to the indoor unit, and the second end thereof being connected to the fourth valve port of the four-way valve (19); a refrigerant adjustment tank (6), the first port thereof being connected to the liquid tube (22), the second port thereof being connected to the low pressure air pipe (23), and the third port thereof optionally communicating with the liquid tube (22) or the low pressure air pipe (23).