Microporous ceramic heating device for atomizer and preparation process thereof

Abstract

The invention discloses a microporous ceramic heating device for an atomizer, which comprises a microporous ceramic substrate and a heating wire arranged on the microporous ceramic substrate. Wherein, the heating wire is a thin strip-shaped heating wire formed after thick film printing, sintering and molding, and then processing by mechanical cutting, chemical etching or laser lithography. The heating wires are evenly distributed on the heating surface of the ceramic substrate. The preparation process of the microporous ceramic heating device for the atomizer of the present invention includes the following steps: setting a microporous ceramic substrate, the microporous ceramic substrate having a heating surface, and performing thick film printing on the heating surface of the microporous ceramic substrate , drying, sintering treatment. Then, the sintered thick film printing part is processed by mechanical cutting, chemical etching or laser lithography to form thin strip heating wires with a predetermined shape.

Description

technical field [0001] The invention relates to a microporous ceramic heating device for an atomizer, in particular to a microporous ceramic substrate heating device using a thick-film printed resistor as a heating material. [0002] The present invention also relates to a preparation process of the above-mentioned microporous ceramic heating device. Background technique [0003] In the field of electronic cigarette technology, the use of microporous ceramics as the oil-conducting medium has become the mainstream configuration. In the electronic cigarette atomizer that uses microporous ceramics as the oil-conducting medium, it is necessary to make the resistance wire as close as possible to the electronic cigarette liquid in the microporous ceramics. Although the resistance wire away from the e-liquid will also generate heat, when the microporous ceramic is used as the oil-conducting component, the precipitated e-liquid cannot be separated from the surface of the micro-poro...

AI Technical Summary

Problems solved by technology

Generally, one or two heating wires are laid on the heating surface 4. Although some are bent, they still cannot achieve a good uniform atomization effect when placed on the ceramic heating surface 4, so the temperature gradient problem is not very good. the solution

like figure 1 The length and width of the ceramic surface are 5 and 4 mm, and when the width of the heating wire is 0.6 mm, except for two parallel heating wires of 0.6 mm, the rest is used as a heating area, and some points are close to 1 mm from the heating wire, so Will affect the atomization effect

[0009] Secondly, since the thick film resistance wire is formed by sintering the metal paste screen, the uniformity of the resistance wire is not perfect due to the problems of printing technology and sintering deformation, and it is not as uniform as the alloy wire resistance.

formed as image 3 In the state shown, the edge of the printed heating wire 3 is in an alternating state of flange and concave edge 5, that is, the edge is relatively poor and uneven, and there will always be some places that are narrow or uneven in thickness. These unevenness lead to electrification When the current density is uneven, the heating temperature is inconsistent, and the temperature difference will cause the deformation of the resistance wire itself, resulting in warping, bursting and other phenomena, and finally lead to fusing

The local damage of the thick film heating resistor is basically caused by the local concentrated overheating caused by the uneven width

Therefore, although the current thick film resistor technology can print wires to a relatively thin level, such as 0.1 mm, the 0.1 mm wires can be used as ordinary wires and resistors for resistance heating due to high heating temperature. , a thick film resistance wire of such a size is easy to be partially overheated and fused due to heating. In fact, it has been found through experiments that when the width of the thick film printed resistance used for heating is less than 0.5 mm, it is basically the result of a second-off power.

[0010] Thirdly, since the thick-film printed heating wire is printed on the heating surface of the ceramic substrate through the screen, the surface of the wire protrudes from the heating surface, and the protruding wire part is difficult to contact with the e-liquid, which leads to dry burning phenomenon, and the heating wire The thickness will also affect the heating effect

The screen printing directly forms the heating wire pattern, so this printing method cannot be printed after setting grooves on the ceramic surface, otherwise it is difficult to directly correspond the screen pattern to the groove during printing

Images