The invention relates to the field of a water dispenser, and provides a car-mounted water dispenser for a passenger car. The car-mounted water dispenser comprises a
water storage tank and a water dispensing
system connected with the
water storage tank, wherein the water dispensing
system comprises a heating inner liner, a
refrigeration inner liner, a water pump, a one-way valve, a three-way valve, a hot water switch and a cold water switch, the water pump conveys water in the
water storage tank to a valve inlet of the three-way valve through the one-way valve, two valve outlets of the three-way valve are respectively communicated with the heating inner liner and the
refrigeration inner liner, the heating inner liner is communicated with the hot water switch, the
refrigeration inner liner is communicated with the cold water switch, the heating inner liner is communicated with the
water storage tank through a water return
pipe, the
water storage tank and the water dispensing
system are of split structures or integral structures, and the water dispensing system also comprises an
ultraviolet disinfection device. When the technical scheme is adopted, the
water storage tank and the water dispensing system adopt the split structures or the integral structures, the installation and the use are convenient, and the
ultraviolet disinfection device can be used for sterilizing and disinfecting drinking water.