Liquid PTC heating unit whose power is adjusted conveniently

Abstract

The invention provides a liquid PTC heating unit whose power is adjusted conveniently, which comprises two PTC heating sheet assemblies and a heating unit aluminous shell coating the two PTC heating sheet assemblies, wherein each PTC heating sheet assembly comprises a plurality of PTC heating sheets, two insulated layers and a heating sheet assembly aluminous shell; the PTC heating sheets and electrode sheets at the upper ends and the lower ends are coated by the first insulated layer; the first insulated layer is coated by the heating sheet assembly aluminous shell; the heating sheet assembly aluminous shell is coated by the second insulated layer; and a locking mechanism is arranged in the middle of an upper plate and a lower plate of the heating unit aluminous shell for changing contact areas between the upper plate and the lower plate and the PTC heating sheet assemblies. The power of the PTC heating unit can be adjusted, the production cost is reduced, the rejection rate is nearly zero, and the operation is safer and more reliable.

Description

technical field [0001] The invention belongs to the technical field of home appliances, and in particular relates to a liquid PTC heating element which is convenient for power adjustment. Background technique [0002] Since the PTC heating element is generally only provided with a sealed and insulated part in the heating element, it can play the role of insulation in most cases, but accidents cannot be ignored, such as the phenomenon of aging caused by a long time, and water is easy to penetrate into the inside of the PTC heater. , such as penetration into the electrode sheet, resulting in leakage and safety accidents. At the same time, the existing forming process of PTC heating components is mostly press forming. The disadvantage of this process is that the power of the heater is prone to inconsistency after one press, and some require a second press to reach the required power. , thereby increasing production costs. Contents of the invention [0003] The purpose of th...

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Problems solved by technology

[0002] Since the PTC heating element is generally only provided with a sealed and insulated part in the heating component, it can play the role of insulation in most cases, but accidents cannot be ignored, such as the phenomenon of aging caused by a long time, and water is easy to penetrate into the inside of the PTC heater. , such as penetration into the electrode sheet, resulting in leakage and safety accidents

At the same time, the existing forming process of PTC heating components is mostly compression forming. The disadvantage of this process is that the power of the heater is prone to inconsistency after one pressing, and some require a second pressing to reach the required power. , thereby increasing production costs

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