The invention relates to a water tank structure of an
electric energy,
solar energy or air energy
water heater, which comprises a water tank,
electric heating tubes, an energy accumulating cover or heating water tank, a connecting tube and a
check valve and is characterized in that more than one circular or wing-shaped metallic or nonmetallic tubular body (12) is installed on the water tank (1) or
flange (13) in a firm
welding or mechanical connection mode, wherein each of two ends or one end of each tubular body (12) is opened outwards, an optical wave
electric heating tube (4-1) is arranged in each tubular body (12), and the water tank needs to be sealed; the optical wave
electric heating tubes (4-1) generate heat
radiation after being powered on, so that the metallic or nonmetallic tubular bodies (12) are heated, and the water surrounding the tubular bodies (12) is heated through the
heat transfer of tube walls; and simultaneously, more than one common stainless steel electric heating tube or
silicon carbide tube (4-2) is arranged in the water tank and does not work when the hot water is released. A section of a
vacuum tube heat accumulator is inserted into the water tank of a
solar energy water heater; a condenser or metallic tube
heat exchanger is arranged in the water tank of an air energy
water heater; and for each of the
solar energy water heater and the air energy water heater, an electric
auxiliary heating device is also arranged in the water tank, i.e. the upper part is provided with a rapid-heating electric heating tube, the lower part is provided with a preheating electric heating tube, the heating water tank can also be manufactured on the
flange or other parts, a water pump is connected to an end part, and the
check valve is installed at the water outlet of the water pump.