Ceramic heating element and production process
By winding the ceramic substrate with the surface printed heating line to form a ceramic heating body, the problems of slow heating speed and complex production process of traditional ceramic heating pipes are solved, and efficient and intelligent heating and long-life ceramic heating body are achieved.
Patent Information
- Application Number
- CN202010297155.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-04-15
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2040-04-15
AI Technical Summary
Due to the limited printing area between the blank tube and the ceramic tube, the heating speed is slow, it is difficult to set up a variety of protection circuits and temperature control circuits. The production process is complex and the cost is high. The bonding is not tight due to inconsistent molding process during high temperature co-firing, which easily generates internal stress and affects product performance.
The ceramic heating body formed by a ceramic substrate with a heating line printed on the surface is wound into two layers and more than two layers, then pressed and then co-fired by high temperature. The first heating line is sealed and sintered between any two layers of the ceramic substrate to achieve efficient heating, and is formed by winding the same ceramic substrate in the production process, sintering synchronously to reduce internal stress.
It improves the heating speed and efficiency of the ceramic heating body, realizes intelligent heating, extends service life, and reduces production costs.
Smart Images
Figure CN111417223B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of heating bodies, in particular to a ceramic heating body and a production process. Background Art
[0002] The traditional ceramic heating tube includes a blank tube and a ceramic tube sleeved outside the blank tube. A heating circuit is sealed between the ceramic tube and the blank tube. The heating circuit is connected to an external power supply through a lead. When the heating circuit is heated, the heating circuit transfers heat to the blank tube and the ceramic tube, and the blank tube and the ceramic tube heat the external object. Since the printing area between the blank tube and the ceramic tube is limited, the heating circuit set between the blank tube and the ceramic tube is limited, and the heating speed of the blank tube and the ceramic body cannot be increased quickly; at the same time, in a limited space, it is difficult to set a variety of protection circuits and temperature control circuits for the heating circuit, and it is difficult for the ceramic heating body to meet the requirements of intelligence. At the same time, the manufacturing process of the traditional ceramic heating tube is to print the heating circuit and the electrode on a ceramic substrate, then roll and press it onto a ceramic blank tube for high-temperature co-firing, and finally braze the lead wire. Since the blank tube and the substrate are formed by different processes, the blank tube is generally formed by isostatic pressing or extrusion, and the substrate is tape-casting. Different forming processes lead to inconsistent shrinkage rates of the two during high-temperature co-firing, resulting in loose bonding, and easy to generate internal stress, affecting product performance, and the processing of the center blank tube is complex and costly. Summary of the invention
[0003] The purpose of the present invention is to solve the deficiencies of the prior art and provide a ceramic heating element and a production process.
[0004] A technical solution of the present invention:
[0005] A ceramic heating body includes a tube body, which is formed by winding a first ceramic substrate with a first heating circuit printed on the surface into two or more layers, pressing them together and then co-firing them at high temperature. At this time, the first heating circuit is sealed and sintered between any two layers of the ceramic substrate.
[0006] A preferred solution is that a blank tube is arranged in the tube body.
[0007] A preferred solution is that the green tube is formed by winding the second ceramic substrate into one or more layers, pressing them together, and then co-firing them at a high temperature.
[0008] A preferred solution is that a second heating circuit is printed on the inner wall of the tube body, the second heating circuit is sealed and wrapped between the inner wall of the tube body and the outer wall of the blank tube, and the first heating circuit is connected to the second heating circuit.
[0009] A preferred solution is that both side edges of the first ceramic substrate are inclined surfaces, the innermost edge of the first ceramic substrate is pressed flatly against the inner wall of the tube body, and the outermost layer of the first ceramic substrate is pressed flatly against the outer wall of the tube body.
[0010] A preferred solution is that the first heating circuit is connected with a lead wire, and the lead wire is arranged between any two layers of the first ceramic substrate.
[0011] A preferred solution is that the first ceramic substrate is printed with a temperature sensing circuit, and the first ceramic substrate is wound into two or more layers, pressed together, and then co-fired at high temperature so that the temperature sensing circuit is sealed between any two layers.
[0012] Another technical solution of the present invention:
[0013] A production process for a ceramic heating element, comprising:
[0014] Take a first ceramic substrate and print a first heating circuit on the surface of the first ceramic substrate;
[0015] The first ceramic substrate is wound into two layers or more, pressed together, and then co-fired at high temperature, so that the first heating circuit is sealed and wrapped between any two layers of the first ceramic substrate.
[0016] A preferred solution is that the starting and ending ends of the first ceramic substrate are processed into inclined surfaces, the first ceramic substrate is wound into a roll structure with two or more layers, the innermost layer of the first ceramic substrate is pressed against the inner wall of the roll structure, and the outermost layer of the first ceramic substrate is pressed against the outer wall of the roll structure, and then the roll structure is sintered into one by an isostatic pressing process.
[0017] A preferred solution also includes: taking a second ceramic substrate, rolling the second ceramic substrate into a tubular structure and sintering it into a green tube, winding the first ceramic substrate printed with a first heating circuit outside the green tube, and sintering the green tube and the wound first ceramic substrate into an integrated structure.
[0018] In summary, the beneficial effects of the present invention are as follows: the tube body is formed by winding the first ceramic substrate into two layers or more layers and pressing them together and then co-firing them at high temperature; the first heating circuit can be located between any two layers of the first ceramic substrate; since the layers are formed by winding the same ceramic substrate, they shrink synchronously during sintering and the adjacent layers are tightly combined, so no internal stress is generated and the service life is greatly improved; at the same time, the first ceramic substrate is used for rolling and molding with high efficiency and low cost; the heating speed is fast, the first heating circuit has enough printing space, a variety of circuits can be set as needed, and the ceramic heating body can realize intelligent heating.
[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Schematic diagram of the ceramic substrate rolled into a tube in the present invention Figure 1 ;
[0021] Figure 2 The three-dimensional ceramic heating body of the present invention Figure 1 ;
[0022] Figure 3 Schematic diagram of the ceramic substrate rolled into a tube in the present invention Figure 2 ;
[0023] Figure 4 The three-dimensional ceramic heating body of the present invention Figure 2 . DETAILED DESCRIPTION
[0024] To illustrate the concept and purpose of the present invention, the present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0025] The first embodiment, as Figure 1 and Figure 2 As shown, a ceramic heating body includes a tube body 10, which is formed by winding a first ceramic substrate 20 with a first heating circuit 21 printed on the surface into two or more layers, pressing them together and then co-firing them at high temperature. At this time, the first heating circuit 21 is sealed and sintered between any two layers of the ceramic substrate.
[0026] like Figure 1 and Figure 2 As shown, the tube body 10 is formed by rolling a first ceramic substrate 20 into a roll-shaped structure, and a first heating circuit 21 is printed on one side of the first ceramic substrate 20. The first ceramic substrate 20 is rolled into two layers or more and pressed together and then co-fired at high temperature. The first heating circuit 21 is sealed and wrapped between the winding overlapping parts of the first ceramic substrate 20. At this time, the first heating circuit 21 is isolated from the outside. The number of layers of the first ceramic substrate 20 can be set as needed, and two or more layers can be set. One side of the first ceramic substrate 20 has enough printing area, and one side of the first ceramic substrate 20 can print enough first heating circuits 21. When the first ceramic substrate 20 is rolled into a roll-shaped structure, there are first heating circuits 21 between two adjacent layers of the first ceramic substrate 20, which increases the printing area of the first heating circuit 21. Since there are first heating circuits 21 between two adjacent layers of the first ceramic substrate 20, the temperature of the tube body 10 can be quickly increased, the heating capacity is strong, the heating of the tube body 10 is uniform, and the power is easy to adjust. The first heating circuit 21 has enough printing area, and the first heating circuit 21 can be provided with a temperature control circuit, a protection circuit and a circuit for detecting resistance change as required, so that the ceramic heating body meets the requirements of intelligence. The tube body 10 is a roll-shaped structure formed by rolling the first ceramic substrate 20, and the tube wall of the tube body 10 can be made very thin, with a simple structure and low cost.
[0027] like Figure 1 and Figure 2 As shown, since the tube body 10 is rolled into a roll structure by the same first ceramic substrate 20, when heating, the cooling and heating of the tube body 10 are synchronized, thereby increasing the service life of the ceramic heating body.
[0028] Preferably, Figure 1 and Figure 2 As shown, the first ceramic substrate 20 is printed with a temperature sensing circuit, and the first ceramic substrate 20 is wound into two or more layers, pressed together, and then co-fired at high temperature so that the temperature sensing circuit is sealed between any two layers. The temperature sensing circuit can detect the temperature of the tube body 10 and detect the temperature of the tube body 10 in real time.
[0029] The second embodiment, as Figure 3 and Figure 4 As shown, the difference between this embodiment and the first embodiment is that a blank tube 30 is arranged inside the tube body 10. The blank tube 30 is a hollow structure, and the blank tube 30 supports and fixes the tube body 10.
[0030] like Figure 3 and Figure 4 As shown, the blank tube 30 is formed by winding the second ceramic substrate 40 into one or more layers, pressing them together, and then co-firing them at a high temperature.
[0031] like Figure 3 and Figure 4 As shown, the inner wall of the tube body 10 is printed with a second heating circuit, and the second heating circuit is sealed and wrapped between the inner wall of the tube body 10 and the outer wall of the blank tube 30, and the first heating circuit 21 is connected to the second heating circuit. The second heating circuit is printed on one side of the first ceramic substrate 20, and can also be printed on one side of the second ceramic substrate 40. When the tube body 10 is sleeved outside the blank tube 30 and sintered as a whole with the blank tube 30, the second heating circuit is sealed and wrapped between the inner wall of the tube body 10 and the outer wall of the blank tube 30, and the second heating circuit is isolated from the outside. The second heating circuit further increases the heating area of the ceramic heating body, the temperature of the ceramic heating body can be quickly increased, the heating capacity is strong, and the power is easy to adjust. The first ceramic substrate 20 and the second ceramic substrate 40 are made of the same material, the tube body 10 and the blank tube 30 are made of the same material, the cooling and heating of the tube body 10 and the blank tube 30 are synchronized, and the service life of the ceramic heating body is improved.
[0032] The third embodiment, as Figures 1 to 4As shown, the difference between this embodiment and the first embodiment or the second embodiment is that the edges on both sides of the first ceramic substrate 20 are inclined surfaces 23, the innermost edge of the first ceramic substrate 20 is flatly pressed against the inner wall of the tube body 10, and the outermost layer of the first ceramic substrate 20 is flatly pressed against the outer wall of the tube body 10. The edges on both sides of the first ceramic substrate 20 are processed into inclined surfaces 23, so that the surfaces of the inner wall and the outer wall of the tube body 10 are flat and without steps, so as to achieve uniform heat transfer.
[0033] like Figures 1 to 4 As shown, the first heating circuit 21 is connected to a lead wire 22 , and the lead wire 22 is arranged between any two layers of the first ceramic substrate 20 .
[0034] The fourth embodiment, as Figure 1 and Figure 2 As shown, a production process of a ceramic heating body comprises:
[0035] The first step is to take a first ceramic substrate 20 and print a first heating circuit 21 on the surface of the first ceramic substrate 20;
[0036] In the second step, the first ceramic substrate 20 is rolled into two or more layers, pressed together, and then co-fired at high temperature, so that the first heating circuit 21 is sealed and wrapped between any two layers of the first ceramic substrate 20 .
[0037] like Figure 1 and Figure 2 As shown, a first heating circuit 21 is printed on one side of the first ceramic substrate 20. The first ceramic substrate 20 has a sufficient area. The first ceramic substrate 20 is rolled into two layers or more and pressed together and then co-fired at high temperature. The first heating circuit 21 is sealed and wrapped between the winding overlapping parts of the first ceramic substrate 20. At this time, the first heating circuit 21 is isolated from the outside. The number of layers of the first ceramic substrate 20 can be set as needed, and two or more layers can be set. One side of the first ceramic substrate 20 has a sufficient printing area, and one side of the first ceramic substrate 20 can print enough first heating circuits 21. When the first ceramic substrate 20 is rolled into a roll structure, there are first heating circuits 21 between two adjacent layers of the first ceramic substrate 20, which increases the printing area of the first heating circuit 21. Since there are first heating circuits 21 between two adjacent layers, the temperature of the tube body 10 can be quickly increased, the heating capacity is strong, the heating of the tube body 10 is uniform, and the power is easy to adjust. The first heating circuit 21 has enough printing area, and the first heating circuit 21 can be provided with a temperature control circuit, a protection circuit and a circuit for detecting resistance change as required, so that the ceramic heating body meets the requirements of intelligence. The tube body 10 is a roll-shaped structure formed by rolling the first ceramic substrate 20, and the tube wall of the tube body 10 can be made very thin, with a simple structure and low cost.
[0038] like Figure 1and Figure 2 As shown, since the tube body 10 is rolled into a roll structure by the same first ceramic substrate 20, when heating, the cooling and heating of the tube body 10 are synchronized, thereby increasing the service life of the ceramic heating body.
[0039] The fifth embodiment, as Figures 1 to 4 As shown, the difference between this embodiment and the fourth embodiment is that the first ceramic substrate 20 has an inclined surface 23 at the beginning and the end, and the first ceramic substrate 20 is wound into a roll structure with two or more layers, the innermost layer of the first ceramic substrate 20 is pressed against the inner wall of the roll structure, and the outermost layer of the first ceramic substrate 20 is pressed against the outer wall of the roll structure, and then the roll structure is sintered into one by an isostatic pressing process. The surface of the inner wall and the outer wall of the tube body 10 is flat and has no steps, so as to achieve uniform heat transfer.
[0040] The sixth embodiment, as Figures 1 to 4 As shown, the difference between this embodiment and the fourth embodiment or the fifth embodiment is that the production process of the ceramic heating body also includes: taking the second ceramic substrate 40, rolling the second ceramic substrate 40 into a tubular structure and sintering it into a blank tube 30, winding the first ceramic substrate 20 printed with the first heating circuit 21 outside the blank tube 30, and sintering the blank tube 30 and the wound first ceramic substrate 20 into an integrated structure. The edges of both sides of the second ceramic substrate 40 can also be provided with inclined surfaces 23. When the second ceramic substrate 40 is rolled into a tubular structure and sintered into a blank tube 30, the surfaces of the inner wall and the outer wall of the blank tube 30 are flat and step-free, so as to achieve uniform heat transfer.
[0041] like Figures 1 to 4 As shown, the tube body 10 and the blank tube 30 are made of the same material, and the cooling and heating of the tube body 10 and the blank tube 30 are synchronized, thereby increasing the service life of the ceramic heating body.
[0042] like Figures 1 to 4 As shown, the entire side surface of the first ceramic substrate 20 can be printed with the first heating circuit 21, the first ceramic substrate 20 printed with the first heating circuit 21 is wound outside the blank tube 30, the blank tube 30 and the wound first ceramic substrate 20 are sintered into an integrated structure, the wound first ceramic substrate 20 forms the tube body 10, and the first heating circuit 21 between the inner wall of the tube body 10 and the outer wall of the blank tube 30 forms a second printed circuit.
[0043] like Figures 1 to 4As shown, since the first heating circuit 21 can be printed on the entire side of the first ceramic substrate 20, the first heating circuit 21 can be provided with a temperature control circuit, a protection circuit and a circuit for detecting resistance changes as required, so that the ceramic heating body meets the requirements of intelligence. The tube body 10 is rolled into a roll structure by the first ceramic substrate 20, and the tube wall of the tube body 10 can be made very thin, with a simple structure and low cost. At the same time, since the tube body 10 is rolled into a roll structure by the same first ceramic substrate 20, when heating, the cooling and heating of the tube body 10 are synchronized, which improves the service life of the ceramic heating body.
[0044] The above is a specific implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.
Claims
1. A ceramic heating element, characterized in that: The invention comprises a tube body, wherein the tube body is formed by winding a first ceramic substrate having a first heating circuit printed on the surface into two or more layers, pressing them together and then co-firing at high temperature. At this time, the first heating circuit is sealed and sintered between any two layers of the ceramic substrate. A blank tube is arranged in the tube body, and the blank tube is formed by winding a second ceramic substrate into one or more layers, pressing them together and then co-firing at high temperature. A second heating circuit is printed on the inner wall of the tube body, and the second heating circuit is sealed and wrapped between the inner wall of the tube body and the outer wall of the blank tube. The first heating circuit is connected to the second heating circuit. The edges on both sides of the first ceramic substrate are inclined surfaces respectively. The innermost edge of the first ceramic substrate is pressed flatly against the inner wall of the tube body, and the outermost layer of the first ceramic substrate is pressed flatly against the outer wall of the tube body.
2. The ceramic heating element according to claim 1, characterized in that: The first heating circuit is connected with a lead wire, and the lead wire is arranged between any two layers of the first ceramic substrate.
3. The ceramic heating element according to claim 1 or 2, characterized in that: The first ceramic substrate is printed with a temperature sensing circuit, and the first ceramic substrate is wound into two layers or more, pressed together, and then co-fired at high temperature so that the temperature sensing circuit is sealed between any two layers.
4. A production process for a ceramic heating element, characterized in that: include: Take a first ceramic substrate and print a first heating circuit on the surface of the first ceramic substrate; The first ceramic substrate is wound into two or more layers, pressed together, and then co-fired at high temperature, so that the first heating circuit is sealed and wrapped between any two layers of the first ceramic substrate. The first ceramic substrate is processed into inclined surfaces at the beginning and the end, and the first ceramic substrate is rolled into a roll structure with two or more layers, the innermost layer of the first ceramic substrate is pressed and attached to the inner wall of the roll structure, and the outermost layer of the first ceramic substrate is pressed and attached to the outer wall of the roll structure, and then the roll structure is sintered into one by an isostatic pressing process; The method also includes: taking a second ceramic substrate, rolling the second ceramic substrate into a tubular structure and sintering it into a green tube, winding the first ceramic substrate printed with a first heating circuit outside the green tube, and sintering the green tube and the wound first ceramic substrate into an integrated structure.
Citation Information
Patent Citations
Tubular heater as well as preparation method and application thereof
CN110074461A
Ceramic heating body
CN211909200U