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Heating element, and preparation method thereof and electric heater

A heating element and electric heating technology, applied in the field of electric heaters, can solve the problems of short heat transfer distance, poor economy, poor heat storage, etc.

Pending Publication Date: 2021-07-06
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these heaters have their own disadvantages: for example, the heat transfer distance of the quartz tube heater is relatively short, the heating wire is easily deformed, and the quartz tube is easy to be broken; Electricity, the economy is relatively poor; carbon fiber heaters heat up quickly, but the heat storage is poor, and the cost is more expensive; electric film heaters have high heating efficiency and fast heating speed, but the electric heating film has poor reliability and short life
Thereby, present heater related technology still needs to be improved

Method used

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  • Heating element, and preparation method thereof and electric heater
  • Heating element, and preparation method thereof and electric heater
  • Heating element, and preparation method thereof and electric heater

Examples

Experimental program
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Effect test

Embodiment 1

[0076] Thermal spraying on a stainless steel substrate to form a thickness of 200 microns, a porosity of less than 2%, and a specific heat capacity of 0.75×10 3 J / (kg*K) aluminum oxide insulating heat storage layer; on the surface of the aluminum oxide insulating heat storage layer away from the stainless steel substrate, spraying forms a FeCrAl heating layer with a thickness of 50 microns (the atomic percentage of oxygen is 25at%, power density 50w / cm 2 ); then print and form silver electrodes (comprising the first electrode and the second electrode) on the surface of the heat generating layer away from the stainless steel base material, and then spray on the surface of the aluminum oxide insulating heat storage layer away from the stainless steel base material to form a covering heat generating layer, Infrared heat storage layer with a single-layer structure (containing alumina and infrared emitting coatings, with a thickness of 300 microns and a specific heat capacity of 1....

Embodiment 2

[0077] Same as Example 1, the difference is that the infrared heat storage layer has a double-layer structure, including an alumina ceramic layer (thickness is 200 microns, porosity Less than 2%, the specific heat capacity is 0.8×10 3 J / (kg*K)), and an infrared emitting layer (thickness 300 microns) located on the surface of the alumina layer ceramic layer away from the substrate. Among them, the arithmetic average deviation of the interface profile of the stainless steel substrate and the alumina insulating heat storage layer is 30 microns, the arithmetic mean deviation of the interface profile of the alumina insulating heat storage layer and the heating layer is 25 microns, and the alumina ceramic layer and The arithmetic mean deviation of the profile of the interface profile between the heat generating layer is 20 microns, the arithmetic mean deviation of the profile of the interface profile between the alumina ceramic layer and the insulating heat storage layer of the alum...

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Abstract

The invention provides a heating element, and a preparation method thereof and an electric heater. The heating element comprises: a base material; a first insulating heat storage layer which is arranged on one surface of the base material; a heating layer which is arranged on the surface, far away from the base material, of the first insulating heat storage layer; an infrared heat storage layer which is arranged on the side, away from the base material, of the first insulation heat storage layer and covers the heating layer. The heating element has the high heating speed and the good heat storage performance at the same time, safety is high, and miniaturization and convenience of the electric heater can be achieved easily.

Description

technical field [0001] The invention relates to the technical field of electric heaters, in particular to a heating element, a preparation method thereof, and an electric heater. Background technique [0002] At present, common electric heaters can be divided into quartz tube heaters, electric heating wire heaters, fan heaters (PTC) heaters, oil heaters, carbon fiber heaters, far-infrared heaters, electrothermal film heaters, Convection heaters, foot warmers, etc. But these heaters have their own disadvantages: for example, the heat transfer distance of the quartz tube heater is relatively short, the heating wire is easily deformed, and the quartz tube is easy to be broken; Electricity, the economy is relatively poor; carbon fiber heaters heat up quickly, but the heat storage is poor, and the cost is more expensive; electric heating film heaters have high heating efficiency and fast heating speed, but the electric heating film has poor reliability and short life. Thereby, ...

Claims

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Application Information

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IPC IPC(8): H05B3/28H05B3/02
CPCH05B3/28H05B3/02H05B1/0277H05B2203/002
Inventor 曹达华万鹏杨玲李洪伟李兴航
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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