Water filler for water tank

A water filler, comprising a water filling device, and a regulating device, wherein:

• the water filling device includes an inner filling tube, an outer filling tube, and an upper cover;
• the outer filling tube is mounted on the inner filling tube and has an upper end having a center formed with a water inlet communicating with the inner filling tube;
• the upper cover is mounted on the outer filling tube, the upper cover has a top formed with a water outlet and has an inner wall formed with a chamber communicating with the water outlet, the chamber of the upper cover has a center formed with a guide column having a periphery formed with a plurality of channels each communicating with the chamber and each communicating with the water inlet of the outer filling tube;
• the regulating device includes a floating barrel, a sliding barrel, a water support disk, and an adjusting unit;
• the floating barrel is movably mounted on the outer filling tube and has an inside formed with a hollow chamber having a first side formed with a through hole mounted on the outer filling tube and a second side formed with a guide track and an opening communicating with the guide track, the inside of the floating barrel has an upper portion formed with an outer chamber, a lower portion formed with an inner chamber and a mediate portion formed with a passage communicating with the outer chamber and the inner chamber;
• the sliding barrel is movably mounted in the inner chamber of the floating barrel and has an upper portion provided with a recessed connecting portion mounted in the passage of the floating barrel;
• the water support disk is movably mounted in the outer chamber of the floating barrel and has a bottom rested on a bottom of the outer chamber of the floating barrel to block the passage of the floating barrel;
• the adjusting unit includes a support bar, and a press plate;
• the support bar is adjustably mounted in the guide track of the floating barrel;
• the press plate is pivotally mounted on the upper cover and the support bar and has a first end which is moved by pivot of the press plate to block the water outlet of the upper cover;
• the water support disk has a portion that is cooperably secured or associated with the recessed connecting portion that allows the sliding barrel and the water support disk to move as a single valve unit to control fluid flow through the passage of the floating barrel;
• the adjusting support bar allows for the floating barrel to be adjusted at or to achieve different water levels;
• the pivot press plate controls fluid flow from the upper cover, while allowing at least some of the water flow therefrom to flow into the outer chamber to add weight to the floating barrel to change its buoyancy, and relieving the weighted fluid through the passage of the floating barrel when a rising liquid level moves the sliding barrel and the water support disk to an open fluid flow position.