The utility model relates to a direct drinking
water heater which comprises a water container, a
heat exchanger, a cold
water pipe and a
warm water pipe. The water container is a closed container body, a heating device is arranged at the bottom in the water container, a cold water leading-in
pipe is arranged on the side wall, and a boiled water leading-out
pipe is arranged at the top and provided with a first switch
branch pipe and a second boiled water
branch pipe. The inner
diameter of an outer pipe of the
heat exchanger is larger than the outer
diameter of an inner pipe, the water inlet end of a cold
water pipe communicates with a municipal
tap water pipe, the water outlet end communicates with the outer pipe at the first end of the
heat exchanger, and the outer pipe at the second end of the heat exchanger communicates with the water inlet end of a cold water ingress pipe. The water inlet end of the
warm water pipe is communicated with the inner pipe at the second end of the heat exchanger; the inner pipe at the first end of the heat exchanger is communicated with the water outlet end of the second boiled water
branch pipe; more than two
warm water branch pipes are arranged at the water outlet end of the warm
water pipe, the inner
diameter of each warm water branch pipe is smaller than that of the warm water pipe, and the ratio of the sum of the inner diameters of all the warm water branch pipes to the inner diameter of the warm water pipe is not larger than 5: 3. According to the utility model, a plurality of warm water faucets can obtain more stable water yield at the same time.