Built-in electric air pump for inflatable product

A built-in electric air pump, comprising an outer casing, an inner casing, a motor, and an impeller;

• the outer casing having an accommodating cavity therein, the outer casing having a first air opening communicating with the accommodating cavity and an exterior, the outer casing being formed with a second air opening communicating with the accommodating cavity, the second air opening being provided with a tongue configured to close the second air opening or to open the second air opening;
• the inner casing being rotatably disposed in the accommodating cavity, an outer wall of the inner casing being provided with a protruding portion for pushing the tongue so as to open the second air opening, the inner casing including a left casing and a right casing, the left casing and the right casing being assembled and fixed by ultrasonic welding or screws, the left casing and the right casing encircling a mounting cavity and an air cavity, the mounting cavity communicating with the air cavity, the inner casing being formed with a third air opening communicating with the air cavity and the first air opening, the inner casing being formed with a fourth air opening communicating with the air cavity and the second air opening;
• the motor being clamped and fixed between the left casing and the right casing, the motor being located in the mounting cavity;
• the impeller being mounted onto an output shaft of the motor and driven to rotate by the motor, the impeller being located in the air cavity, wherein the outer casing includes a bottom casing and a panel, the panel is arranged on a top of the bottom casing to surround the accommodating cavity, the first air opening is located on the panel, the second air opening is located on the bottom casing, a covering is sleeved on the panel, a sealing cover is connected to the covering, the sealing cover is detachably mounted to the first air opening and configured to hermetically cover the first air opening.