The present invention provides a water cleaning device. Differing from conventional water treatment device, this novel water cleaning device is provided with an accommodating space, and a plurality of transparent photocatalyst units having at least one opening are equidistantly disposed in the accommodating space. Therefore, when the water needing to be treated is injected into the water cleaning device, the water would forward flow along a winding flow path formed by those openings, such that both the flow time of the water in the accommodating space and the sterilizing and cleaning time for the water are obviously increased. Moreover, distinguishing from the conventional photocatalyst glass plate, the present invention also proposes a novel photocatalyst glass plate consisting of a glass substrate, a photocatalyst film, and a protective film, wherein the protective film is made of at least one specific materials possessing excellent water erosion resistance, and used for preventing external water from invading into the glass substrate via the pin holes of the photocatalyst film and then eroding the glass substrate. So that, the glass substrate of the novel photocatalyst glass plate is protected from occurring with the acidification. As a result, it is ensure that the photocatalyst film would not scale from the glass substrate even if the photocatalyst glass plate has been long time used.本發明係提供一種水潔淨裝置。不同於習知的水處理裝置,本發明之水潔淨裝置內部係設計有一容置空間,並且,藉由將複數個具有至少一開口的透明光觸媒單元等間距地設置於該容置空間之中,係能夠導引注入於水潔淨裝置之一待潔淨水,使其沿著一蜿蜒式水流路徑而流動於水潔淨裝置之內部,藉此方式增加該待潔淨水於水潔淨裝置內部之一流動時間,並同時提升待潔淨水於水潔淨裝置內部的一殺菌潔淨時間。此外,不同於習知的光觸媒玻璃板,本發明之光觸媒玻璃板係由一玻璃基板、一光觸媒鍍膜、與一保護膜所組成,其中,保護膜由至少一耐水侵蝕的材料所製成,能夠防止外界水分子經由該光觸媒鍍膜所具有的孔洞侵入而侵蝕該玻璃基板;因此,於本發明所設計之光觸媒玻璃板不會發生玻璃基板吐酸現象;故,即便經過長期使用,鍍於玻璃基板之上的光觸媒鍍膜亦不會發生自玻璃基板之上脫落的現象。1‧‧‧水潔淨裝置11‧‧‧水潔淨主體12‧‧‧透明光觸媒單元110‧‧‧容置空間113‧‧‧入水管114‧‧‧出水管21‧‧‧水族箱22‧‧‧抽水幫浦121‧‧‧開口16‧‧‧雜質過濾單元13‧‧‧紫外燈管
