The invention relates to heat dissipation devices and discloses an enhanced heat dissipation device with pulsating flows and wavy-wall microchannels adopted. The device comprises a microchannel heat dissipation
cold plate, a pulsating pump, a cooler, a liquid working medium injection pipeline and a liquid working medium return pipeline, wherein the liquid working medium injection pipeline and the liquid working medium return pipeline are used for connecting the microchannel heat dissipation
cold plate, the pulsating pump and the cooler together, the microchannel heat dissipation
cold plate is a rectangular thin plate and is composed of a
microchannel heat sink and a
microchannel heat sink cover plate, communicated liquid cavities are formed in the periphery of the
microchannel heat sink, the part surrounded by the liquid cavities is divided into four equal parts by two perpendicular liquid division cavities located on the
axis of symmetry of the rectangular thin plate, wavy-wall microchannels are distributed all over each equal part in the
diagonal direction of the rectangular thin plate, four liquid working medium outlets are formed in the microchannel
heat sink cover plate and connected with the liquid working medium return pipeline, and a liquid working medium inlet is formed in the microchannel
heat sink cover plate and is connected with the liquid working medium injection pipeline. According to the device, the liquid working medium flowing path is fully optimized, and heat exchange efficiency is improved greatly.