Liquid cooling device and vehicle

The utility model relates to a liquid cooling device and a vehicle, the liquid cooling device is used for cooling a power module, the liquid cooling device comprises a pre-mixing cavity, an air inlet used for introducing a gas medium and a liquid inlet used for introducing a liquid medium are formed in the end, away from the power module, of the pre-mixing cavity, and the end, away from the power module, of the pre-mixing cavity is provided with an air inlet used for introducing the gas medium and a liquid inlet used for introducing the liquid medium; a jet hole is formed in the end, close to the power module, of the premixing cavity and used for spraying atomized jet towards the power module. Therefore, different from the traditional liquid cooling technology, the premixed gas medium is added in the working medium inlet area to assist in working medium atomization, and the gas medium can perform strong disturbance and enhanced heat exchange on the liquid at the same time, so that the heat flux density of the power module is improved under the condition that the structural space change is not large. By arranging the premixing cavity, the air and the working medium are mixed more uniformly, the jet hole is formed in the position, corresponding to the power module, of the premixing cavity, the working medium can be accurately put into a heat source part needing to be cooled, and the heat exchange effect is improved.