A high-power ceramic heating element

Abstract

The invention relates to the technical field of ceramic heating units, in particular to a large power ceramic heating unit. The large power ceramic heating unit comprises an aluminum oxide ceramic core and an aluminum oxide ceramic substrate, thick film heating circuits are printed on the inner side face of the aluminum oxide ceramic substrate, the thick film heating circuits are of a reciprocating inflection structure, the distance H is formed between two adjacent thick film heating circuits, the aluminum oxide substrate wraps the outer side face of the aluminum oxide ceramic core in a reeling shape, the width L of wires of the thick film heating circuits is 0.3-1.3mm, and the ratio H / L of the distance H formed by the thick film heating circuits and the width L of the wires of the thick is 0.5-1.5; the thickness T of the aluminum oxide substrate is 0.3-0.8 mm, and the ratio W / T of the thickness of the wall of the aluminum oxide ceramic core and the thickness T of the aluminum oxide substrate is 2-5. When the large power ceramic heating unit works, the power of the large power ceramic heating unit can be more than 3000W, the breakthrough that a small-sized heating unit carries out large-power heating is achieved, the temperature of the surface of the heating unit is kept uniform, generated bubbles are small and are not prone to being attached to the surface of the heating unit, and durability is extraordinary.

Description

Technical field [0001] The invention relates to the technical field of ceramic heating elements, in particular to a high-power ceramic heating element. Background technique [0002] At present, ceramic heating tubes are mainly used in smart toilets, storage-type electric water heaters and storage-type drinking fountains. The ceramic heating tube is a kind of metal with high melting point such as W, Re, Mo, etc. printed on a ceramic sheet to form heating resistors and lead electrodes. Then the surface where the heating resistors are printed is used as the inside, and then wound on the outside of the ceramic tube. The two are compressed by vacuum hot pressing or hydraulic process, and then the whole is fired into one body. The electrode lead-out part outside the ceramic sheet connects the heating circuit and the electrode pad through the through hole formed on the ceramic sheet. Inject the conductor solder as needed, and then solder the lead on the pad. [0003] Smart toilets and s...

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Problems solved by technology

[0003] Smart toilets and storage-type electric water heaters have relatively low power requirements (generally below 2000W), but in recent years, energy-saving and environmentally friendly instant electric water heaters have gradually been introduced to the market. Therefore, the power requirements for ceramic heating tubes also increase, and the power of a single heating tube needs to be at least 3000W. The existing low-power heating tubes can no longer meet the requirements.

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