Ceramic heating device

Abstract

The utility model provides a ceramic heating device which comprises a ceramic heating body, the ceramic heating body comprises an upper ceramic chip, a heating resistor, a lower ceramic chip and a lead, the heating resistor is located between the upper ceramic chip and the lower ceramic chip, the lead is electrically connected with the heating resistor, and the heating resistor is electrically connected with the lead. The ceramic heating plate is characterized by further comprising a nano-composite ceramic coating layer, the surface of the ceramic heating body is covered by the nano-composite ceramic coating layer, one end of the lead is fixedly arranged between the upper ceramic plate and the lower ceramic plate, and the other end of the lead penetrates through the nano-composite ceramic coating layer and is led out. The technical scheme of the utility model has the beneficial effects or advantages that the nano-composite ceramic coating is sprayed on the surface of the ceramic heating body through the spray gun, and is dried and cooled to form a coating layer, so that the insulating property, the heat dissipation property and the surface uniformity are good.

Description

TECHNICAL FIELD

[0001] The utility model relates to ceramic heating device technical field. BACKGROUND

[0002] The ceramic heating sheet is a new generation of high efficiency, green and environmental protection heating device, which is widely used in industrial and agricultural technology, communication, medical treatment, daily life and other various heating device products, and is used for providing heat source for heating component or directly used as heating component.

[0003] The ceramic heating body on the market at home and abroad is a flat plate structure composed of upper ceramic sheet, heating resistance, lower ceramic sheet and lead wire, the heating resistance is located between the upper ceramic sheet and the lower ceramic sheet, and the lead wire is electrically connected with the heating resistance. The main material of the upper ceramic sheet and the lower ceramic sheet is alumina. The ceramic heating body has the following defects: poor insulation, poor heat dissipation and poor surface uniformity.

[0004] Therefore, the technical field needs a ceramic heating device with good insulation, good heat dissipation and good surface uniformity. INVENTION CONTENTS

[0005] The utility model solves the technical problem, and provides a ceramic heating device.

[0006] The utility model is such a realization: a ceramic heating device, including ceramic heating body, the ceramic heating body includes upper ceramic sheet, heating resistance, lower ceramic sheet and lead wire, the heating resistance is located between the upper ceramic sheet and the lower ceramic sheet, the lead wire is electrically connected with the heating resistance, still include nanometer composite ceramic coating layer, the surface of the ceramic heating body is covered with the nanometer composite ceramic coating layer, one end of the lead wire is fixedly arranged between the upper ceramic sheet and the lower ceramic sheet, the other end of the lead wire passes through the nanometer composite ceramic coating layer and leads outwards.

[0007] Further, the heating resistance is a bent line circuit shape.

[0008] Further, the line circuit two ends of the heating resistance are connected with positive electrode and negative electrode respectively, the positive electrode and the negative electrode are also connected with two lead wires respectively, and the positive electrode and the negative electrode are located at the front end of the ceramic heating body.

[0009] Further, the thickness of the nanometer composite ceramic coating layer is 5 to 50 microns.

[0010] Compared with the background art, the beneficial effects or advantages of the technical scheme of the utility model are: the nano-composite ceramic coating is sprayed on the surface of the ceramic heating body by a spray gun, and a coating layer is formed after drying and cooling, and the ceramic heating device has good insulation, good heat dissipation and good surface uniformity; the gap between the upper ceramic sheet and the lower ceramic sheet, and the connection between the lead wire and the heating resistor are sealed by the nano-composite ceramic coating layer, and the insulation is improved; the heat generated by the heating resistor is transmitted to the nano-composite ceramic coating layer through the upper ceramic sheet and the lower ceramic sheet, and then dispersed to the surrounding, and the heat dissipation is improved; the nano-composite ceramic coating layer has low surface roughness, and thus has good surface uniformity, which is beneficial to uniform heat dissipation. BRIEF DESCRIPTION OF DRAWINGS

[0011] The utility model will be further described below with reference to the drawings and embodiments.

[0012] Figure 1 is a structural schematic view of the ceramic heating device of the utility model.

[0013] Figure 2 is Figure 1 the sectional view in A-A direction.

[0014] Reference signs: upper ceramic sheet 1; heating resistor 2; lower ceramic sheet 3; nano-composite ceramic coating layer 4; lead wire 5; positive electrode 6; negative electrode 7. DETAILED DESCRIPTION

[0015] The embodiment of the utility model provides a kind of ceramic heating device, and the general idea of technical scheme is as follows:

[0016] Using existing spraying technology, nano-composite ceramic coating is sprayed on the surface of the ceramic heating body by a spray gun, and a coating layer is formed after drying and cooling as the surface layer of the ceramic heating device, and the obtained ceramic heating device has good insulation, good heat dissipation and good surface uniformity, which improves the quality of product.

[0017] In order to better understand the above technical scheme, the above technical scheme will be described in detail below in conjunction with the drawings of the specification and specific embodiments.

[0018] Reference Figure 1 with Figure 2 , preferred embodiment of the utility model.

[0019] The utility model discloses a ceramic heating device, including ceramic heating body, the ceramic heating body includes upper ceramic sheet 1, heating resistance 2, lower ceramic sheet 3 and lead 5, the heating resistance 2 is located between the upper ceramic sheet 1 and the lower ceramic sheet 3, the lead 5 is electrically connected with the heating resistance 2, still including nanometer composite ceramic coating layer 4, the surface of the ceramic heating body is covered by nanometer composite ceramic coating layer 4, one end of lead 5 is fixedly arranged between the upper ceramic sheet 1 and the lower ceramic sheet 3, and the other end of lead 5 passes through nanometer composite ceramic coating layer 4 and leads out outward.

[0020] The utility model discloses the beneficial effect or advantage of technical scheme: nanometer composite ceramic coating is through the surface of ceramic heating body and is sprayed in the spray gun, forms coating layer after drying and cooling, and good, good, surface uniformity is good; The gap between the upper ceramic sheet 1 and the lower ceramic sheet 3 and the connecting place of lead 5 and heating resistance 2 are all sealed by nanometer composite ceramic coating layer 4, and the insulation is improved; The heat generated by heating resistance 2 is transmitted to nanometer composite ceramic coating layer 4 through the upper ceramic sheet 1 and the lower ceramic sheet 3, and then disperses to the four directions, and the heat dissipation is improved; The surface roughness of nanometer composite ceramic coating layer 4 is low, so the surface uniformity is good, and it is favorable to uniform heat dissipation.

[0021] Nanometer composite ceramic coating layer 4 is black, which helps to hide the internal structure.

[0022] In the embodiment, the paint used by nanometer composite ceramic coating layer 4 has the following five choices.

[0023] (1) The paint used by nanometer composite ceramic coating layer 4 can refer to the invention patent document with publication number CN105862390B, which discloses a kind of nanometer composite ceramic coating suitable for inorganic fiber.

[0024] (2) The paint used by nanometer composite ceramic coating layer 4 can refer to the invention patent document with publication number CN111218132A, which discloses a kind of graphene heat dissipation coating.

[0025] (3) The paint used by nanometer composite ceramic coating layer 4 can refer to the invention patent document with publication number CN117586687A, which discloses a kind of preparation method of high-efficiency heat dissipation graphene heat dissipation coating.

[0026] (4) The paint used by nanometer composite ceramic coating layer 4 can refer to the invention patent document with publication number CN116462998A, which discloses a kind of water-based low-voltage graphene heating coating containing silicon carbide and its preparation method and use.

[0027] (5) The coating used for the nanocomposite ceramic coating layer 4 can refer to the invention patent document with publication number CN114921119A, which discloses a silicon carbide coating with high thermal conduction and high heat radiation and a preparation method thereof.

[0028] The heating resistor 2 is in a meandering line shape, which helps to improve the uniformity of heat generation.

[0029] The two ends of the heating resistor 2 are connected to the positive electrode 6 and the negative electrode 7, respectively, and the positive electrode 6 and the negative electrode 7 are also connected to the two lead wires 5, respectively, and the positive electrode 6 and the negative electrode 7 are located at the front end of the ceramic heating body. This helps to stably connect the lead wire 5 and the heating resistor 2.

[0030] The thickness of the nanocomposite ceramic coating layer is 5-50 microns.

[0031] The manufacturing method of the ceramic heating body is disclosed in the invention patent document with patent application number 201810853787.4, which discloses a manufacturing method of a ceramic heating sheet, including the following steps: step 1, adding the required substances for the printed circuit into a suspension for a certain number of times of grinding to form a paste-like printing paste, and standing for a certain time; step 2, printing the printing paste on a ceramic sheet; step 3, after printing, placing it in a drying oven for a certain time; step 4, covering a ceramic sheet and performing isostatic pressing; step 5, after completing the isostatic pressing, placing it in a sintering furnace for sintering, and finally performing nickel wire brazing.

[0032] After obtaining the ceramic heating body, the position of the ceramic heating body is fixed, the nanocomposite ceramic coating is sprayed on the surface of the ceramic heating body using a spray gun, and after drying and cooling, the ceramic heating device of the utility model is obtained.

[0033] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that the specific examples described are only illustrative, and are not used to limit the scope of the utility model, and equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the utility model should be covered within the scope of protection of the claims of the utility model.

Claims

1. A ceramic heating device comprising a ceramic heating element, the ceramic heating element comprising an upper ceramic sheet, a heating resistor, a lower ceramic sheet, and a lead wire, the heating resistor being located between the upper ceramic sheet and the lower ceramic sheet, the lead wire being electrically connected to the heating resistor, characterized in that: The surface of the ceramic heating body is covered by a nanocomposite ceramic coating layer, one end of the lead wire is fixedly arranged between the upper ceramic sheet and the lower ceramic sheet, and the other end of the lead wire penetrates through the nanocomposite ceramic coating layer and leads outwards.

2. A ceramic heating device according to claim 1, characterized in that: The heating resistor is in a shape of a bent circuit.

3. A ceramic heating device according to claim 1, characterized in that: The two ends of the circuit of the heating resistor are respectively connected with a positive electrode and a negative electrode, the positive electrode and the negative electrode are respectively connected with two lead wires, and the positive electrode and the negative electrode are located at the front end of the ceramic heating body.

4. The ceramic heating device according to claim 1, characterized in that: The thickness of the nanocomposite ceramic coating layer is 5-50 microns.

Images