Wavelength conversion device

The invention discloses a wavelength conversion device, and the device comprises a sealing body which is provided with a first sealing cavity; the fluorescent wheel assembly is located in the first sealing cavity, the fluorescent wheel assembly comprises a substrate, a rotating shaft and a driving part, the substrate comprises a first surface and a second surface which are opposite, the rotating shaft is arranged on the second surface of the substrate, and the driving part is connected to the rotating shaft; the inner circulation channel is arranged in the first sealing cavity, and the driving piece is located in the inner circulation channel; when the driving piece drives the base plate to rotate, the flowing medium in the first sealing cavity flows to the rotating shaft and returns to the inner circulation channel through the second surface of the base plate. The influence of heat on the laser efficiency of the fluorescent powder is reduced. 本申请公开了一种波长转换装置，波长转换装置包括：密封体，密封体形成有第一密封空腔；荧光轮组件，荧光轮组件位于第一密封空腔内，荧光轮组