Ceramic heating sheet with single heating layer

Abstract

The utility model provides a ceramic heating sheet with a single heating layer, which comprises an upper ceramic sheet, a heating unit and a lower ceramic sheet which are sequentially connected. The heating device is characterized in that the heating unit comprises a positive electrode, a negative electrode, a head longitudinal heating resistor, a tail longitudinal heating resistor, at least one middle longitudinal heating resistor and a plurality of transverse heating resistors; one end of the head longitudinal heating resistor is connected with the positive electrode, one end of the tail longitudinal heating resistor is connected with the negative electrode, and the other end of the head longitudinal heating resistor, the multiple middle longitudinal heating resistors and the other end of the tail longitudinal heating resistor are sequentially connected through the multiple transverse heating resistors. And the width of the transverse heating resistor is greater than that of the middle longitudinal heating resistor, so that the heating of the heating sheet is uniform, and the service life of the ceramic heating sheet is prolonged.

Description

Technical Field

[0001] The utility model relates to a ceramic heating sheet, in particular to a ceramic heating sheet with a single-layer heating layer. Background Art

[0002] The ceramic heating sheet is a new generation of high-efficiency and green environmental protection heating device, which is widely used in various heating products such as industrial and agricultural technologies, communications, medical treatment, and daily life, and is used to provide heat sources for heating components or directly used as heating components.

[0003] At present, the ceramic heating sheets on the domestic and foreign markets are flat structures composed of ceramic sheets, heating resistors, and leads. The heating resistors are located between two ceramic sheets, and the leads are electrically connected to the heating resistors. Limited by the heating power, the heating area of each heating sheet is small, and the heating area is concentrated in the middle of the ceramic heating sheet, which makes the volume of the ceramic heating sheet large, but the heating area is small; and because it is concentrated in the middle of the ceramic heating sheet for a long time, the service life of the ceramic heating sheet is further reduced. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a ceramic heating sheet with a single-layer heating layer, so that the heating of the heating sheet is uniform and the service life of the ceramic heating sheet is improved.

[0005] The utility model is realized as follows: A ceramic heating sheet with a single-layer heating layer includes an upper ceramic sheet, a heating unit, and a lower ceramic sheet. The upper ceramic sheet, the heating unit, and the lower ceramic sheet are connected in sequence. The heating unit includes a positive electrode, a negative electrode, a first longitudinal heating resistor, a tail longitudinal heating resistor, at least one intermediate longitudinal heating resistor, and a plurality of transverse heating resistors;

[0006] One end of the first longitudinal heating resistor is connected to the positive electrode, one end of the tail longitudinal heating resistor is connected to the negative electrode, and the other end of the first longitudinal heating resistor, a plurality of intermediate longitudinal heating resistors, and the other end of the tail longitudinal heating resistor are sequentially connected through a plurality of transverse heating resistors;

[0007] The width of the transverse heating resistor is greater than the width of the intermediate longitudinal heating resistor.

[0008] Further, the ratio of the width of the transverse heating resistor to the width of the intermediate longitudinal heating resistor is: 1.1-1.2:1.

[0009] Further, the first longitudinal heating resistor, the tail longitudinal heating resistor, and at least one intermediate longitudinal heating resistor have the same width.

[0010] Further, the upper ceramic sheet, the heating unit, and the lower ceramic sheet form a flat plate structure, a curved plate structure, or an annular plate structure.

[0011] The advantages of the present utility model are as follows: A ceramic heating sheet with a single-layer heating layer in the present utility model enables the ceramic heating sheet to generate heat evenly and does not concentrate in the middle of the ceramic heating sheet; furthermore, due to the even heat generation, the ceramic is not easily damaged, and the service life of the ceramic heating sheet is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present utility model will be further described below with reference to the accompanying drawings in conjunction with embodiments.

[0013] Figure 1 is a schematic diagram of a ceramic heating sheet with a single-layer heating layer of the present utility model Figure 1 .

[0014] Figure 2 is a schematic diagram of a heating unit of a ceramic heating sheet with a single-layer heating layer of the present utility model.

[0015] Figure 3 is a schematic diagram of a ceramic heating sheet with a single-layer heating layer of the present utility model Figure 2 .

[0016] Figure 4 is a schematic diagram of a ceramic heating sheet with a single-layer heating layer of the present utility model Figure 3 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Please refer to Figure 1 and Figure 2 as shown, a ceramic heating sheet with a single-layer heating layer of the present utility model includes an upper ceramic sheet 1, a heating unit 2, and a lower ceramic sheet 3. The upper ceramic sheet 1, the heating unit 2, and the lower ceramic sheet 3 are connected in sequence. The heating unit 2 includes a positive electrode 21, a negative electrode 22, a first longitudinal heating resistor 23, a last longitudinal heating resistor 24, at least one intermediate longitudinal heating resistor 25, and a plurality of transverse heating resistors 26;

[0018] One end of the first longitudinal heating resistor 23 is connected to the positive electrode 21, one end of the last longitudinal heating resistor 24 is connected to the negative electrode 22, and the other end of the first longitudinal heating resistor 23, a plurality of intermediate longitudinal heating resistors 25, and the other end of the last longitudinal heating resistor 24 are connected in sequence through a plurality of transverse heating resistors 26;

[0019] The width of the transverse heating resistor 26 is greater than the width of the intermediate longitudinal heating resistor 25.

[0020] Since heat dissipation is relatively fast at the positions at both ends of the ceramic heating sheet, the heating temperature at both ends is relatively low, while the heating temperature in the middle of the ceramic heating sheet is high. By setting different heating resistors, the heat generation at both ends is made greater, and thus the heat generation of the entire ceramic heating sheet is made uniform, and the service life of the ceramic heating sheet is improved.

[0021] In this embodiment, preferably, the ratio of the width L1 of the lateral heating resistor 26 to the width L2 of the middle longitudinal heating resistor 25 is: 1.1 to 1.2:1; by setting this ratio, the heating energy of the lateral heating resistor 26 is greater than the heat generation of the middle longitudinal heating resistor 25, making the heat on the entire ceramic heating sheet uniform. A larger width means a larger resistance value, and thus a greater heat generation after being energized.

[0022] In this embodiment, preferably, the first longitudinal heating resistor 23, the tail longitudinal heating resistor 24, and at least one middle longitudinal heating resistor 25 have the same width; since the first longitudinal heating resistor 23, the tail longitudinal heating resistor 24, and at least one middle longitudinal heating resistor 25 are arranged at intervals in sequence, the heat generation in this part is relatively uniform, so their widths can be set to be equal.

[0023] As Figure 1 shown, the upper ceramic sheet 1, the heating unit 2, and the lower ceramic sheet 3 form a flat plate-like structure;

[0024] As Figure 3 shown, the upper ceramic sheet 1, the heating unit 2, and the lower ceramic sheet 3 form a curved plate-like structure;

[0025] As Figure 4 shown, the upper ceramic sheet 1, the heating unit 2, and the lower ceramic sheet 3 form an annular plate-like structure.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments we described are only illustrative, rather than used to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should all be covered by the scope protected by the claims of the present invention.

Claims

1. A ceramic heating sheet with a single-layer heating layer, comprising an upper ceramic sheet, a heating unit, and a lower ceramic sheet, wherein the upper ceramic sheet, the heating unit, and the lower ceramic sheet are connected in sequence, and it is characterized in that: The heating unit includes a positive electrode, a negative electrode, a first longitudinal heating resistor, a last longitudinal heating resistor, at least one intermediate longitudinal heating resistor, and a plurality of transverse heating resistors; One end of the first longitudinal heating resistor is connected to the positive electrode, one end of the last longitudinal heating resistor is connected to the negative electrode, and the other end of the first longitudinal heating resistor, the plurality of intermediate longitudinal heating resistors, and the other ends of the last longitudinal heating resistor are sequentially connected through the plurality of transverse heating resistors; The width of the transverse heating resistor is greater than the width of the intermediate longitudinal heating resistor.

2. The ceramic heating sheet with a single-layer heating layer according to claim 1, characterized in that: The ratio of the width of the transverse heating resistor to the width of the intermediate longitudinal heating resistor is: 1.1～1.2:1。 3. The ceramic heating sheet with a single-layer heating layer according to claim 1, characterized in that: The first longitudinal heating resistor, the last longitudinal heating resistor, and at least one intermediate longitudinal heating resistor have the same width.

4. The ceramic heating sheet with a single-layer heating layer according to claim 1, characterized in that: The upper ceramic sheet, the heating unit, and the lower ceramic sheet form a flat plate-like structure, a curved plate-like structure, or an annular plate-like structure.

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