Ceramic heating sheet with double heating layers

Abstract

The invention provides a ceramic heating sheet with double heating layers, which comprises an upper ceramic sheet, a first heating unit, a middle ceramic sheet, a second heating unit and a lower ceramic sheet which are connected in sequence, the length of the second tail longitudinal heating resistor is equal to that of the first tail longitudinal heating resistor; and the length of the second tail transverse heating resistor is equal to the sum of the length of the second transverse heating resistor and the length of one first transverse 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 invention relates to a ceramic heating sheet, in particular to a ceramic heating sheet with double heating layers. Background Art

[0002] Ceramic heating elements are a new generation of high-efficiency, green and environmentally friendly heating devices. They are widely used in various heating products such as industrial and agricultural technology, communications, medical treatment, and daily life. They are used to provide heat sources for heating components or are used directly as heating components.

[0003] At present, the ceramic heating sheet on the domestic and foreign markets is a flat structure composed of a ceramic sheet, a heating resistor, and a lead. The heating resistor is located between two ceramic sheets, and the lead is electrically connected to the heating resistor. Due to the limitation of 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 larger, but the heating area is smaller; and because it is concentrated in the middle of the ceramic heating sheet for a long time, the life of the ceramic heating sheet is further reduced. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a ceramic heating sheet with a double heating layer, so that the heating sheet generates heat evenly and the service life of the ceramic heating sheet is increased.

[0005] The present invention is implemented as follows: a ceramic heating sheet with a double heating layer comprises an upper ceramic sheet, a first heating unit, a middle ceramic sheet, a second heating unit and a lower ceramic sheet, wherein the upper ceramic sheet, the first heating unit, the middle ceramic sheet, the second heating unit and the lower ceramic sheet are connected in sequence, wherein the first heating unit comprises a first positive electrode, a first negative electrode, a first head longitudinal heating resistor, a first tail longitudinal heating resistor, at least one first intermediate longitudinal heating resistor and a plurality of first transverse heating resistors; one end of the first head longitudinal heating resistor is connected to the first positive electrode, one end of the first tail longitudinal heating resistor is connected to the first negative electrode, and the other end of the first head longitudinal heating resistor, the plurality of first intermediate longitudinal heating resistors and the other end of the first tail longitudinal heating resistor are connected in sequence through the plurality of first transverse heating resistors;

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

[0007] The length of the second tail longitudinal heating resistor is equal to the length of the first tail longitudinal heating resistor; the length of the second tail transverse heating resistor is equal to the length of the second transverse heating resistor plus the length of the first transverse heating resistor.

[0008] Furthermore, the width of the first transverse heating resistor is greater than the width of the first middle longitudinal heating resistor.

[0009] Furthermore, the ratio of the width of the first transverse heating resistor to the width of the first middle longitudinal heating resistor is 1.1-1.2:1.

[0010] Furthermore, the widths of the first leading longitudinal heating resistor, the first trailing longitudinal heating resistor and the first middle longitudinal heating resistor are the same.

[0011] Furthermore, the upper ceramic sheet, the first heating unit, the middle ceramic sheet, the second heating unit and the lower ceramic sheet form a flat plate structure, a curved plate structure or an annular plate structure.

[0012] The advantages of the present invention are as follows: the ceramic heating plate with a double-layer heating layer of the present invention adopts a two-layer heating layer structure, and the two layers of heating complement each other, so that the ceramic heating plate generates heat evenly and the heat is not concentrated in the middle of the ceramic heating plate; furthermore, due to the uniform heating, the ceramic is not easily damaged, so that the service life of the ceramic heating plate is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of a ceramic heating sheet with a double heating layer of the present invention. Figure 1 .

[0015] Figure 2 It is a schematic diagram of a first heating unit of a ceramic heating sheet with a double heating layer according to the present invention.

[0016] Figure 3 It is a schematic diagram of the second heating unit of a ceramic heating sheet with a double heating layer according to the present invention.

[0017] Figure 4 This is a schematic diagram of a ceramic heating sheet with a double heating layer of the present invention. Figure 2 .

[0018] Figure 5 This is a schematic diagram of a ceramic heating sheet with a double heating layer of the present invention. Figure 3 . DETAILED DESCRIPTION

[0019] See also Figures 1 to 3As shown, a ceramic heating sheet with a double heating layer of the present invention comprises an upper ceramic sheet 1, a first heating unit 2, a middle ceramic sheet 3, a second heating unit 4 and a lower ceramic sheet 5, wherein the upper ceramic sheet 1, the first heating unit 2, the middle ceramic sheet 3, the second heating unit 4 and the lower ceramic sheet 5 are connected in sequence, and the first heating unit 2 comprises a first positive electrode 21, a first negative electrode 22, a first head longitudinal heating resistor 23, a first tail longitudinal heating resistor 24, at least one first intermediate longitudinal heating resistor 25 and a plurality of first transverse heating resistors 26; one end of the first head longitudinal heating resistor 23 is connected to the first positive electrode 21, one end of the first tail longitudinal heating resistor 24 is connected to the first negative electrode 22, and the other end of the first head longitudinal heating resistor 23, the plurality of first intermediate longitudinal heating resistors 25 and the other end of the first tail longitudinal heating resistor 24 are connected in sequence through a plurality of first transverse heating resistors 26;

[0020] The second heating unit 4 includes a second positive electrode 41, a second negative electrode 42, a second first longitudinal heating resistor 43, a second tail longitudinal heating resistor 44, at least one second intermediate longitudinal heating resistor 45, a plurality of second transverse heating resistors 46 and a second tail transverse heating resistor 47; one end of the second first longitudinal heating resistor 43 is connected to the second positive electrode 41, one end of the second tail longitudinal heating resistor 44 is connected to the second negative electrode 42, and the other end of the second tail longitudinal heating resistor 44 is connected to one end of the second tail transverse heating resistor 47; the other end of the second first longitudinal heating resistor 43, the plurality of second intermediate longitudinal heating resistors 45 and the other end of the second tail transverse heating resistor 47 are sequentially connected through the plurality of second transverse heating resistors 46;

[0021] The length of the second tail longitudinal heating resistor 44 is equal to the length of the first tail longitudinal heating resistor 24 ; the length of the second tail transverse heating resistor 47 is equal to the length of the second transverse heating resistor 46 plus the length of the first transverse heating resistor 26 .

[0022] Since the heat dissipation at the two ends of the ceramic heating plate is relatively fast, the heating temperature at the two ends is relatively low, while the heating temperature in the middle of the ceramic heating plate is high. By arranging the first heating unit 2 and the second heating unit 4 to complement each other in heat, the ceramic heating plate can heat evenly, and the heat is not concentrated in the middle of the ceramic heating plate, so that the life of the ceramic heating plate is improved; the first positive electrode 21, the second positive electrode 41, the first negative electrode 22 and the second negative electrode 42 are led out through the lead wires, and then connected to the power supply for use.

[0023] In this embodiment, preferably, a width L1 of the first transverse heating resistor 26 is greater than a width L2 of the first middle longitudinal heating resistor 25 .

[0024] In this embodiment, preferably, the ratio of the width L1 of the first transverse heating resistor 26 to the width L2 of the first intermediate longitudinal heating resistor 25 is 1.1-1.2:1; by setting this ratio, the heating energy of the first transverse heating resistor 26 is greater than the heating value of the first intermediate longitudinal heating resistor 25, so that the heat on the entire ceramic heating plate is uniform, and the larger the width, the greater the resistance value, and the greater the heat generation after power is turned on; the heating resistors are all set by printing, so their thickness is consistent.

[0025] In this embodiment, preferably, the widths of the first leading longitudinal heating resistor 23 , the first trailing longitudinal heating resistor 24 , and the first middle longitudinal heating resistor 25 are the same.

[0026] like Figure 1 As shown, the upper ceramic sheet 1, the first heating unit 2, the middle ceramic sheet 3, the second heating unit 4 and the lower ceramic sheet 5 form a planar plate structure.

[0027] like Figure 4 As shown, the upper ceramic sheet 1, the first heating unit 2, the middle ceramic sheet 3, the second heating unit 4 and the lower ceramic sheet 5 form a curved plate-shaped structure.

[0028] like Figure 5 As shown, the upper ceramic sheet 1, the first heating unit 2, the middle ceramic sheet 3, the second heating unit 4 and the lower ceramic sheet 5 form an annular plate structure.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and 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 therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0030] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended 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 be included in the scope of protection of the claims of the present invention.

Claims

1. A ceramic heating sheet with a double heating layer, comprising an upper ceramic sheet, a first heating unit, a middle ceramic sheet, a second heating unit and a lower ceramic sheet, wherein the upper ceramic sheet, the first heating unit, the middle ceramic sheet, the second heating unit and the lower ceramic sheet are connected in sequence, characterized in that: The first heating unit includes a first positive electrode, a first negative electrode, a first head longitudinal heating resistor, a first tail longitudinal heating resistor, at least one first intermediate longitudinal heating resistor and a plurality of first transverse heating resistors; one end of the first head longitudinal heating resistor is connected to the first positive electrode, one end of the first tail longitudinal heating resistor is connected to the first negative electrode, and the other end of the first head longitudinal heating resistor, the plurality of first intermediate longitudinal heating resistors and the other end of the first tail longitudinal heating resistor are sequentially connected through the plurality of first transverse heating resistors; The second heating unit includes a second positive electrode, a second negative electrode, a second first longitudinal heating resistor, a second tail longitudinal heating resistor, at least one second intermediate longitudinal heating resistor, a plurality of second transverse heating resistors and a second tail transverse heating resistor; one end of the second first longitudinal heating resistor is connected to the second positive electrode, one end of the second tail longitudinal heating resistor is connected to the second negative electrode, and the other end of the second tail longitudinal heating resistor is connected to one end of the second tail transverse heating resistor; the other end of the second first longitudinal heating resistor, the plurality of second intermediate longitudinal heating resistors and the other end of the second tail transverse heating resistor are sequentially connected through the plurality of second transverse heating resistors; The length of the second tail longitudinal heating resistor is equal to the length of the first tail longitudinal heating resistor; the length of the second tail transverse heating resistor is equal to the length of the second transverse heating resistor plus the length of the first transverse heating resistor.

2. A ceramic heating sheet with a double heating layer as claimed in claim 1, characterized in that: The width of the first transverse heating resistor is greater than the width of the first middle longitudinal heating resistor.

3. A ceramic heating sheet with a double heating layer as claimed in claim 2, characterized in that: The ratio of the width of the first transverse heating resistor to the width of the first middle longitudinal heating resistor is: 1.1～1.2:1。 4. A ceramic heating sheet with a double heating layer as claimed in claim 1, characterized in that: The first leading longitudinal heating resistor, the first trailing longitudinal heating resistor and the first middle longitudinal heating resistor have the same width.

5. A ceramic heating sheet with double heating layers as claimed in claim 1, characterized in that: The upper ceramic sheet, the first heating unit, the middle ceramic sheet, the second heating unit and the lower ceramic sheet form a flat plate structure, a curved plate structure or an annular plate structure.

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