Abstract: A heat exchange device includes a first heat exchanger and a second heat exchanger. At least one of the first heat exchanger and the second heat exchanger is provided with a spraying device that can be turned off. An air outlet of the first heat exchanger is connected to an air inlet of the second heat exchanger. An atomization device that can be turned off is provided at an air inlet of the first heat exchanger, so that after atomized particles undergo evaporation heat exchange in the first heat exchanger, atomized particles which have not undergone sufficient heat exchange can enter the second heat exchanger for sufficient heat exchange. The provision of both the spraying device and the atomization device in the heat exchange device allows for selecting different cooling modes according to different cooling powers.

Abstract: A dry-wet combined heat exchange device includes a rack, a plate-shaped dry heat exchanger and a plate-shaped wet heat exchanger. A placement cavity is formed in the rack. A first ventilation opening extends vertically through the top of the placement cavity, and a second ventilation opening extends horizontally through one or more sides of the placement cavity. The plate-shaped dry heat exchanger is obliquely arranged in the placement cavity to divide the placement cavity into an upper cavity and a lower cavity, and has an upper plate surface facing the first ventilation opening and a lower plate surface facing at least one second ventilation opening. The plate-shaped wet heat exchanger is disposed at and transverse to the first ventilation opening and/or at least one second ventilation opening.

Abstract: An LED filament lamp comprises a bulb shell and an LED filament component located inside the bulb shell. The LED filament lamp further comprises a driving board, a lamp holder bulb shell and an inside liner. The inside liner is a bulb shell structure made of insulating material and installed inside the lamp holder bulb shell. At least a part of the driving board is located inside the inside liner to make the driving board and the lamp holder bulb shell separate from each other. The LED filament component is electrically connected to the driving board and the lamp holder bulb shell is electrically connected to the driving board. The LED filament lamp has characteristic of simple structure.

Abstract: An LED spotlight includes a lens, a LED light source board and a star shaped or multiple star shaped lighting lined LED light source. The side of the lens is formed as reflective surface. The incident surface is the groove structure of toward away from the sunken of the LED light source. The incident surface includes the first incident portion, the second portion and the transition section between the first incident portion and the second portion. The LED spotlight through setting the incident surface, the exit surface and the reflective surface to become the light allocation structure. The function the light passes through the first incident portion, the second incident portion and the transition section may realize the range between twenty-five degrees and one hundred and twenty in negative degrees adjust. Therefore, the LED spotlight owns the advantage to realize the high efficiency orient light allocation.

Abstract: An LED filament lamp comprises a bulb shell and an LED filament component located inside the bulb shell. The LED filament lamp further comprises a driving board, a lamp holder bulb shell and an inside liner. The inside liner is a bulb shell structure made of insulating material and installed inside the lamp holder bulb shell. At least a part of the driving board is located inside the inside liner to make the driving board and the lamp holder bulb shell separate from each other. The LED filament component is electrically connected to the driving board and the lamp holder bulb shell is electrically connected to the driving board. The LED filament lamp has characteristic of simple structure.