Universal PTC liquid heater

Abstract

The invention discloses a universal PTC liquid heater comprising a round tube-shaped metal shell, a PTC heating core and a sealing flange, wherein one end of the metal shell in contact with water is welded and sealed, and the sealing flange is installed on the other end of the metal shell; the PTC heating core is arranged in the metal shell, the PTC heating core comprises a PTC heating element, electrode slices and insulating films, the PTC heating element is formed by connecting one or more special high temperature resistant and high voltage resistant PTC ceramic pieces in parallel, the electrode slices are adhered on the two side faces of the PTC ceramic pieces by heat conduction silica gel, conducting wires or connectors are connected to conducting wire connection portions of the electrode slices, the insulating films are wrapped at the outside of the electrode slices, heat conduction bars are respectively arranged on the two sides of the insulating films, the heat conduction bars take the shape of aluminum semicircular strips and are combined into cylinder shapes with the PTC heating core, and the size of the cylinder is matched with the inside diameter of the metal shell. Theuniversal PTC liquid heater disclosed by the invention is used for heating general liquids, and has the characteristics of long service life, low attenuation rate, dry burning, easy installation and low breakdown rate.

Description

technical field [0001] The invention belongs to the technical field of electronic component manufacturing, and in particular relates to a general-purpose PTC liquid heater. Background technique [0002] At present, as an emerging heating source, PTC ceramics are widely used in various fields such as white goods, integrated ceilings, automobiles, and kitchen appliances. They have excellent characteristics such as slow attenuation, stable operation, and no open flames. However, some specific fields, such as submerged liquid heating or places with special requirements for installation structure and installation space, are difficult to install with heaters manufactured by traditional PTC heating core processing methods. It is close to the traditional heating wire heating tube, but the heating performance is expected to reach the level of PTC ceramic heating, so it is necessary to develop a PTC ceramic heater whose shape is close to the traditional heating wire heating tube. At ...

AI Technical Summary

Problems solved by technology

At present, there are similar heaters on the market, but the interior is filled with magnesia powder for flake PTC ceramics. While solving the shape and heating performance of these products, it also brings about the fatal phenomenon of increasing the breakdown ratio of PTC ceramics.

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