To put it simply, it is a mobile water heater used for bathing. Introduction: The water tank cover on the top of the water tank is equipped with a power switch and a bathing/heating switch. The heater and water pump are installed in the base of the water tank. The heater and water pump are connected to the external low-voltage DC power socket and power cord respectively through signal lines. The inlet of the water pump is connected to the water tank, and the outlet of the water pump is connected to the shower head through the water supply hose; heating The device is relatively fixed to the bottom wall of the water tank. The elastic power cord take-up box is placed at the bottom of the water tank. The power switch on the water tank cover is connected to the external low-voltage DC power socket and power cord through signal lines, and the bathing/heating switch on the water tank cover is connected to the water pump and heater through signal lines. Inventor: Yu Huaxin, patent number: 201220149408.1