Novel PTC heating device

Abstract

The invention discloses a novel PTC heating device, and belongs to the technical field of electric heating, the novel PTC heating device comprises a heating shell, a protective sleeve, a PTC thermistor element, an electrode plate and an insulating film, the heating shell is internally provided with a first accommodating cavity, the protective sleeve is internally provided with a second accommodating cavity, and the protective sleeve is correspondingly inserted into the first accommodating cavity of the heating shell; the PTC thermistor element is of a sheet-shaped structure; the two electrode plates are correspondingly attached to the large surfaces of the two sides of the PTC thermistor element, and the two electrode plates are electrically connected with the first electrode lug block and the second electrode lug block respectively; the insulating film is hermetically coated around the PTC thermistor element and the two electrode plates; and the PTC thermistor element coated with the insulating film and the two electrode plates are correspondingly inserted into the second accommodating cavity in the protective sleeve. The assembly efficiency and the heat transfer performance of the PTC heating device can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric heating, and in particular to a novel PTC heating device. Background Art

[0002] A conventional PTC heating device has a PTC thermistor element, which is usually connected to two conductors of the PTC thermistor element in a conductive manner. The two conductors are arranged and configured to power the PTC thermistor element with different polarities. At the same time, in order to realize that the PTC heating device has an insulator covering the PTC thermistor element, the heating device is usually connected to the shell by glue potting and fixing block press-fitting. The technical solution uses glue potting, which is less efficient in assembly. Summary of the invention

[0003] Technical problems to be solved: In view of the technical problems existing in the background technology, the present invention provides a novel PTC heating device, which can improve the assembly efficiency and heat transfer performance of the PTC heating device.

[0004] Technical solution: A novel PTC heating device described in the present invention comprises: A heating shell, wherein a first accommodating cavity is disposed in the heating shell; A protective cover, wherein a second accommodating cavity is disposed in the protective cover, and the protective cover is correspondingly inserted into the first accommodating cavity of the heating shell; A PTC thermistor element, wherein the PTC thermistor element is a sheet structure; The electrode sheet includes two sheets correspondingly arranged on the large surfaces on both sides of the PTC thermistor element, and the two electrode sheets are electrically connected to the first electrode ear block and the second electrode ear block respectively; An insulating film, wherein the insulating film is sealed and coated around the PTC thermistor element and the two electrode sheets; The PTC thermistor element covered with an insulating film and the two electrode sheets are correspondingly inserted into the second accommodating cavity in the protective cover.

[0005] Preferably, the protective cover has a wedge-shaped shape; and the shape of the first accommodating cavity matches the shape of the protective cover.

[0006] Preferably, both ends of the protective sleeve are provided with limiting grooves or limiting protrusions along the height direction, and the inner side wall of the first accommodating cavity and the protective sleeve are correspondingly provided with matching limiting grooves or limiting protrusions.

[0007] Preferably, the first electrode lug block and the second electrode lug block are arranged at different positions in the horizontal plane, and the first electrode lug block and the second electrode lug block are arranged at different positions in the height direction.

[0008] Preferably, the heating shell comprises a shell and a supporting flange correspondingly arranged at the top end of the shell.

[0009] Compared with the prior art, the present invention has at least the following beneficial effects: The PTC thermistor element and the heating shell of the PTC heating device of the present invention are designed to be insulated; the protective cover and the heating shell are connected by press-fitting, so that the PTC thermistor element and the electrode sheet form a sufficient electrical contact area, ensuring that the heat generated by the PTC thermistor element is well dissipated, and the press-fitting of the protective cover and the heating shell reduces the thermal resistance, thereby achieving higher thermal efficiency.

[0010] The present invention also has other beneficial effects which are described in the embodiments of the specification and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A cross-sectional view of the structure of the PTC heating device of the present invention along its width; Figure 2 for Figure 1 A top view of the structure of the PTC heating device; Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the middle protective cover.

[0012] Figure numerals: 100, PTC heating device; 1, heating shell; 11, shell; 12, supporting flange; 13, first accommodating cavity; 14, limiting protrusion; 2, protective cover; 21, second accommodating cavity; 22, limiting groove; 3, insulating film; 4, electrode sheet; 5, PTC thermistor element; 6, first electrode ear block; 7, second electrode ear block. DETAILED DESCRIPTION

[0013] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the attached Figures 1 to 3 The technical solutions of the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the described embodiments of the present invention belong to the scope of protection of the present invention.

[0014] like Figure 1As shown, a novel PTC heating device according to an embodiment of the present invention, the PTC heating device 100 comprises a heating shell 1, a protective cover 2, a PTC thermistor element 5, an electrode sheet 4 and an insulating film 3. The heating shell 1 comprises a shell 11 and a supporting flange 12 correspondingly arranged at the top of the shell 11, and a first accommodating cavity 13 is arranged in the heating shell 1. A second accommodating cavity 21 is arranged in the protective cover 2, and the protective cover 2 is correspondingly inserted into the first accommodating cavity 13 of the heating shell 1. The PTC thermistor element 5 is a sheet structure, and the electrode sheet 4 comprises two sheets correspondingly arranged on the large surfaces on both sides of the PTC thermistor element 5, and the two electrode sheets 4 are electrically connected to the first electrode ear block 6 and the second electrode ear block 7 respectively, and the insulating film 3 is sealed and coated around the PTC thermistor element 5 and the two electrode sheets 4; the PTC thermistor element 5 and the two electrode sheets 4 coated with the insulating film 3 are correspondingly inserted into the second accommodating cavity 21 in the protective cover 2, and the protective cover 2 and its internal components are correspondingly inserted into the first accommodating cavity 13 of the heating shell 1. The PTC thermistor element 5 and the heating shell 11 of the PTC heating device of the present invention are designed to be insulated; the protective cover 2 and the heating shell 1 are connected by press-fitting, so that the PTC thermistor element 5 and the electrode sheet 4 form a sufficient electrical contact area, ensuring that the heat generated by the PTC thermistor element 5 is well dissipated, and the press-fitting of the protective cover 2 and the heating shell 1 reduces the thermal resistance and achieves higher thermal efficiency.

[0015] In a preferred embodiment, if Figures 1 to 3 As shown, the protective cover 2 has a wedge-shaped shape, and the shape of the first accommodating cavity 13 matches the shape of the protective cover 2 . This structure can facilitate the convenient and efficient insertion of the protective cover 2 and its internal components into the heating housing 1 .

[0016] In a more preferred embodiment, Figure 2~3 As shown, the two ends of the protective cover 2 are respectively provided with limiting grooves 22 or limiting protrusions 14 along the height direction, and the inner side wall of the first accommodating cavity 13 and the protective cover 2 are correspondingly provided with matching limiting grooves 22 or limiting protrusions 14; if the two ends of the protective cover 2 are respectively provided with limiting grooves 22 along the height direction, the inner side wall of the first accommodating cavity 13 and the protective cover 2 are correspondingly provided with matching limiting protrusions 14, and vice versa. This arrangement can improve the connection efficiency and stability of the protective cover 2 and its internal components with the heating shell 1.

[0017] In a preferred embodiment, if Figure 1 As shown, the first electrode ear block 6 and the second electrode ear block 7 are arranged at different positions in the horizontal plane, and the first electrode ear block 6 and the second electrode ear block 7 are arranged at different positions in the height direction. This arrangement is beneficial for connecting the two electrode sheets of the PTC heating device with the correspondingly arranged copper busbars, and supplying power to the PTC heating device through the copper busbars, thereby reducing the risk of short circuit.

[0018] The above are preferred embodiments 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 should also be regarded as within the scope of protection of the present invention.

Claims

1. A new type of PTC heating device, characterized in that: The PTC heating device (100) comprises: A heating shell (1), wherein a first accommodating cavity (13) is provided in the heating shell (1); A protective sleeve (2), wherein a second accommodating cavity (21) is provided in the protective sleeve (2), and the protective sleeve (2) is correspondingly inserted into the first accommodating cavity (13) of the heating shell (1); A PTC thermistor element (5), wherein the PTC thermistor element (5) is a sheet-like structure; An electrode sheet (4), the electrode sheet (4) comprising two sheets correspondingly arranged on the large surfaces on both sides of the PTC thermistor element (5), and the two electrode sheets (4) are electrically connected to the first electrode ear block (6) and the second electrode ear block (7) respectively; An insulating film (3), the insulating film (3) being sealed and coated around the PTC thermistor element (5) and the two electrode sheets (4); The PTC thermistor element (5) coated with an insulating film (3) and the two electrode sheets (4) are correspondingly inserted into the second accommodating cavity (21) in the protective sleeve (2).

2. The novel PTC heating device according to claim 1 is characterized in that: The outer shape of the protective sleeve (2) is a wedge-shaped structure; and the shape of the first accommodating cavity (13) is adapted to the outer shape of the protective sleeve (2).

3. The novel PTC heating device according to claim 2 is characterized in that: Both ends of the protective sleeve (2) are provided with limiting grooves (22) or limiting protrusions (14) along the height direction, respectively, and the inner side wall of the first accommodating cavity (13) and the protective sleeve (2) are provided with matching limiting grooves (22) or limiting protrusions (14) respectively.

4. The novel PTC heating device according to claim 1 is characterized in that: The first electrode lug block (6) and the second electrode lug block (7) are arranged at different positions in a horizontal plane, and the first electrode lug block (6) and the second electrode lug block (7) are arranged at different positions in a height direction.

5. The novel PTC heating device according to any one of claims 1 to 4, characterized in that: The heating shell (1) comprises a shell (11) and a supporting flange (12) correspondingly arranged at the top end of the shell (11).

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