A corrosion-resistant cooling fin and a corrosion-resistant heating fin

Abstract

The invention provides a corrosion-resistant cooling fin comprising an austenite ferrite stainless steel plate used as a cooling element, and a layered glass ceramic multiphase composite ceramic used as an insulating element. The austenite ferrite stainless steel plate and the layered glass ceramic multiphase composite ceramic are tightly combined together. The invention also provides a corrosion-resistant heating fin comprising an austenite ferrite stainless steel plate used as a cooling element, and a layered glass ceramic multiphase composite ceramic used as an insulating element, wherein the austenite ferrite stainless steel plate and the layered glass ceramic multiphase composite ceramic are tightly combined together. Heat generating elements are embedded in the corrosion-resistant heating fin. The heat generating element has characteristics of high combination intensity, strong thermal shock resistance, a long service life, sensitive temperature control, high temperature resistance and fusion prevention, no electric leakage in humid state, and substantially-increased security. The corrosion-resistant cooling fin and the corrosion-resistant heating fin have characteristics of strong high-temperature corrosion resistance, a uniform heating surface, low thermal inertia, fast heating speed, large heating area per unit volume, high power density, high thermal efficiency, high design flexibility in structural shape and power density, high cost performance, and environmental friendliness and energy conservation.

Description

technical field [0001] The invention relates to a corrosion-resistant cooling fin and a corrosion-resistant heating fin. Background technique [0002] Existing electric radiators mainly include metal substrate radiators and ceramic substrate radiators. Metal substrate radiators are mostly made of aluminum and aluminum alloy substrates, copper substrates, stainless steel substrates and insulating layers. Aluminum expands the heat exchange area, and some heat sinks use graphite with a large thermal conductivity to expand the heat exchange area to achieve the purpose of increasing heat exchange efficiency. [0003] The existing heat sinks in the field of medium and low temperature electric heat exchangers have the following disadvantages. The heat dissipation area of ​​the electric heating pipe radiator is small, uneven, and local overheating is easy. The response speed of the sensing element is relatively slow, the efficiency is relatively low, and the life span is short due ...

AI Technical Summary

Problems solved by technology

[0003] The existing heat sinks in the field of medium and low temperature electric heat exchangers have the following disadvantages. The heat dissipation area of ​​the electric heating pipe radiator is small, uneven, and local overheating is easy. The reaction speed of the sensing element is relatively slow, the efficiency is relatively low, and the life span is short due to the concentration of heat

[0004] Most of the existing work panels of sheet-shaped electric heat sinks use aluminum and aluminum alloy substrates, copper substrates, and ordinary stainless steel substrates. With economic development, environmental pollution has intensified. However, people's requirements for food safety and hygiene are increasing with social progress. Some working panels of electric radiators have unsatisfactory corrosion resistance or poor bonding performance with the insulating layer, which is difficult to meet the use requirements of medium and low temperature electric heating, especially the corrosion resistance decreases with the increase of temperature. For the metal on the cooling face of the heat exchanger, the high temperature corrosion resistance is very important

The application of ordinary ferritic stainless steel is limited due to its unsatisfactory corrosion resistance; ordinary stainless steel, such as the commonly used 304 stainless steel, has a pitting corrosion index (PREN) of only 18 and a large thermal expansion coefficient. It can be screen printed with conductive ink or conductive paste. The combination of electric heating elements formed by the process has poor thermal shock resistance, and is easily damaged due to voltage fluctuations and heating environment changes, and the cost is high, which seriously affects the actual promotion; ordinary martensitic stainless steel has poor welding performance and is difficult to process.

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