Novel PTC heating assembly

Abstract

The invention discloses a novel PTC heating assembly, and belongs to the technical field of electric heating, the novel PTC heating assembly comprises a heating shell, a protective sleeve, a PTC thermistor element and an electrode plate, and a first accommodating cavity is arranged in the heating shell; the protective sleeve is of a U-shaped structure made of an insulating material, a limiting crack is formed in the center of the protective sleeve in the height direction, and the protective sleeve is correspondingly inserted into the first containing cavity of the heating shell. The PTC thermistor element is of a sheet-shaped structure, and the two electrode plates are correspondingly attached to the large faces of the two sides of the PTC thermistor element and electrically connected with the first electrode lug block and the second electrode lug block respectively. And the PTC thermistor element and the two electrode plates are correspondingly embedded in the limiting crack. According to the PTC heating assembly, the protection sleeve structure integrating the functions of the insulation pad, the support and the wedge block is adopted, the part manufacturing cost is saved, the assembly time of the heating assembly is shortened, the part size requirement of the heating assembly is lowered accordingly, and the assembly efficiency is improved.

Description

Technical Field

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

[0002] At present, most of the PTC heating components in the electric vehicle industry are composed of heating elements, electrode sheets, brackets, insulating pads, and wedge blocks. The assembly method is: fix the two electrode sheets and the heating element with glue, wrap the insulating pads on the surface of the two electrode sheets, and then insert them into the bracket and insert them into the heating groove of the heating shell, and then press the wedge block between the heating groove and the bracket to make the heating element and the electrode sheet fully contact to improve the heating effect. However, the existing heating components are composed of many parts and the unit price of the parts is high, resulting in high part costs and long assembly time. 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 component, which can improve the assembly efficiency and heat transfer performance of the PTC heating component.

[0004] Technical solution: A novel PTC heating component described in the present invention comprises: A heating shell, wherein a first accommodating cavity is disposed in the heating shell; The protective cover is a U-shaped structure made of insulating material, with a limited gap in the center along its height; 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; Wherein, the PTC thermistor element and the two electrode sheets are correspondingly embedded in the limiting gap.

[0005] Preferably, the large surfaces on both sides of the U-shaped structure are respectively and parallelly provided with a plurality of wedge-shaped ribs along the height direction thereof, and the thickness of the wedge-shaped ribs gradually decreases from top to bottom.

[0006] Preferably, the two electrode sheets are respectively embedded in the inner side surfaces of the two side walls of the U-shaped structure, and the area of ​​the electrode sheets is smaller than the area of ​​the side walls of the U-shaped structure; the PTC thermistor element is tightly clamped between the two electrode sheets.

[0007] Preferably, connection blocks are respectively provided at the top of the two electrode sheets, and the connection blocks pass through the top of the corresponding side walls of the U-shaped structure, and the first electrode ear block and the second electrode ear block are respectively electrically connected to the corresponding electrode sheets through the connection blocks.

[0008] Preferably, the first electrode lug block and the second electrode lug block are arranged at different positions in a horizontal plane.

[0009] Compared with the prior art, the present invention has at least the following beneficial effects: The PTC heating assembly of the present invention eliminates structures such as a bracket, an insulating pad, and a wedge-shaped block, and adopts a protective cover structure that integrates the functions of an insulating pad, a bracket, and a wedge-shaped block, which not only saves the manufacturing cost of parts and reduces the assembly time of the heating assembly, but also reduces the size requirements of the heating assembly parts, thereby improving the assembly efficiency. 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 a 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 It is a schematic diagram of the three-dimensional structure of the PTC heating component of the present invention; Figure 2 for Figure 1 The top view of the structure of the PTC heating component; Figure 3 for Figure 2 The structural cross-section view of the PTC heating component in the AA direction; Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the middle protective cover and its internal components; Figure 5 for Figure 4 A top view of the middle protective cover and its internal components; Figure 6 for Figure 5 Structural cross-section view along BB direction; Figure 7 for Figure 5 Structural cross-section view in CC direction; Figure 8 for Figure 1 Schematic diagram of the three-dimensional structure of the middle electrode sheet; Fig. 9 for Figure 8 Cross-sectional view of the middle electrode sheet and its internal structure.

[0012] Figure numerals: 100, PTC heating component; 1, heating shell; 11, first accommodating cavity; 2, protective cover; 21, U-shaped structure; 22, wedge-shaped ribs; 23, limiting gap; 3, first electrode ear block; 4, second electrode ear block; 5, electrode sheet; 51, connecting block; 6, PTC thermistor element. 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 9 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 Figures 1 to 6 As shown, a new type of PTC heating component of an embodiment of the present invention, the PTC heating component 100 includes a heating shell 1, a protective cover 2, a PTC thermistor element 6 and an electrode sheet 5. A first accommodating cavity 11 is arranged in the heating shell 1. The protective cover 2 is a U-shaped structure 21 made of insulating material, and a limited position gap 23 is opened in the center along its height. The large surfaces on both sides of the U-shaped structure 21 are respectively arranged in parallel along its height direction. The thickness of the wedge-shaped ribs 22 gradually decreases from top to bottom. The protective cover structure integrating the functions of an insulating pad, a bracket and a wedge block is adopted, which not only saves the manufacturing cost of parts and reduces the assembly time of the heating component, but also reduces the size requirements of the heating component parts, thereby improving the assembly efficiency. The PTC thermistor element 6 is a sheet structure, and the electrode sheet 5 includes two sheets correspondingly arranged on the large surfaces on both sides of the PTC thermistor element 6, and the two electrode sheets 5 are respectively electrically connected to the first electrode ear block 3 and the second electrode ear block 4, and the PTC thermistor element 6 and the two electrode sheets 5 are correspondingly embedded in the limited position gap 23. During assembly, the protective cover 2 is correspondingly inserted into the first accommodating cavity 11 of the heating shell 1. 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. The press-fitting of the protective cover and the heating shell reduces the thermal resistance and achieves higher thermal efficiency.

[0015] In a preferred embodiment, if Figures 6 to 9 As shown, two electrode sheets are respectively embedded in the inner side surfaces of the two side walls of the U-shaped structure 21, and the area of ​​the electrode sheets is smaller than the area of ​​the side walls of the U-shaped structure 21; the PTC thermistor element is tightly clamped between the two electrode sheets. The two electrode sheets and the PTC thermistor element are integrally injection molded to form an integral heating component. The specific processing method is: first, the PTC thermistor element is respectively bonded to the two electrode sheets, and then placed in a mold and injected with insulating material to obtain a protective cover. The protective cover and its internal components are pressed into the first accommodating cavity of the heating shell by interference pressing, and then the gap between the first accommodating cavity and the protective cover is filled with thermal conductive glue.

[0016] In a preferred embodiment, if Figures 6 to 9 As shown, connecting blocks 51 are respectively provided at the top of the two electrode sheets, and the connecting blocks 51 pass through the top of the corresponding side walls of the U-shaped structure 21, and the first electrode ear block 3 and the second electrode ear block 4 are respectively electrically connected to the corresponding electrode sheets through the connecting blocks 51, and the first electrode ear block 3 and the second electrode ear block 4 are arranged in an offset manner in the horizontal plane. This arrangement is beneficial to the wiring of the PTC heating component and reduces the risk of short circuit.

[0017] 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 component, characterized in that: The PTC heating component (100) comprises: A heating shell (1), wherein a first accommodating cavity (11) is provided in the heating shell (1); A protective cover (2), the protective cover (2) being a U-shaped structure (21) made of insulating material, with a limiting gap (23) provided in the center along its height; the protective cover (2) is correspondingly inserted into the first accommodating cavity (11) of the heating shell (1); A PTC thermistor element (6), wherein the PTC thermistor element (6) is a sheet-like structure; An electrode sheet (5), the electrode sheet (5) comprising two sheets correspondingly arranged on the large surfaces on both sides of the PTC thermistor element (6), and the two electrode sheets (5) are electrically connected to the first electrode ear block (3) and the second electrode ear block (4) respectively; The PTC thermistor element (6) and the two electrode sheets (5) are correspondingly embedded in the limiting gap (23).

2. The novel PTC heating component according to claim 1 is characterized in that: The large surfaces on both sides of the U-shaped structure (21) are respectively and parallelly provided with a plurality of wedge-shaped ribs (22) along the height direction thereof, and the thickness of the wedge-shaped ribs (22) gradually decreases from top to bottom.

3. The novel PTC heating component according to claim 1 is characterized in that: The two electrode sheets are respectively embedded in the inner side surfaces of the two side walls of the U-shaped structure (21), and the area of ​​the electrode sheets is smaller than the area of ​​the side walls of the U-shaped structure (21); the PTC thermistor element is tightly clamped between the two electrode sheets.

4. The novel PTC heating component according to claim 3 is characterized in that: A connection block (51) is respectively provided at the top of the two electrode sheets, and the connection block (51) passes through the top of the corresponding side wall of the U-shaped structure (21), and the first electrode ear block (3) and the second electrode ear block (4) are respectively electrically connected to the corresponding electrode sheets through the connection block (51).

5. The novel PTC heating component according to claim 4 is characterized in that: The first electrode lug block (3) and the second electrode lug block (4) are arranged at different positions in a horizontal plane.

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