Novel PTC heating assembly

Abstract

The utility model discloses a novel PTC (Positive Temperature Coefficient) heating assembly, which belongs to the technical field of electric heating and comprises a heating shell, a protective sleeve, a PTC thermistor element and an electrode plate, 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. The PTC heating assembly of the utility model adopts a protective sleeve structure which integrates the functions of an insulation pad, a support and a wedge block, thereby saving the manufacturing cost of parts, reducing the assembly time of the heating assembly, reducing the size requirements of the parts of the heating assembly, and improving the assembly efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric heating technical field especially relates to a novel PTC heating assembly. BACKGROUND

[0002] At present, most of PTC heating assemblies in electric vehicle industry are composed of heating element, electrode sheet, support, insulating pad and wedge-shaped block, and the assembling mode is as follows: two electrode sheets and heating element are fixed by using glue, the insulating pad is wrapped on the surface of two electrode sheets, then the support is assembled and inserted into the heating groove of the heating shell, and the wedge-shaped block is pressed between the heating groove and the support to make the heating element and the electrode sheet fully contact to improve the heating effect. However, the existing heating assembly is composed of many parts, the unit price of the parts is high, which leads to high cost of the parts and long assembly time. INVENTION CONTENTS

[0003] The technical problem solved by the utility model is that the utility model provides a novel PTC heating assembly, which can improve the assembly efficiency and heat transfer performance of the PTC heating assembly.

[0004] Technical scheme: the utility model discloses a novel PTC heating assembly, and the PTC heating assembly comprises:

[0005] A heating shell is provided with a first accommodating cavity in the heating shell;

[0006] A protective sleeve is made of an insulating material in a U-shaped structure, and a limiting gap is formed in the center along the height of the U-shaped structure; the protective sleeve is inserted into the first accommodating cavity of the heating shell;

[0007] A PTC thermistor element is in a sheet structure;

[0008] An electrode sheet comprises two sheets arranged on the two sides of the PTC thermistor element, and the two electrode sheets are electrically connected with a first electrode lug and a second electrode lug respectively;

[0009] The PTC thermistor element and the two electrode sheets are embedded in the limiting gap.

[0010] Preferably, a plurality of wedge-shaped ribs are arranged on the two large surfaces of the U-shaped structure in parallel along the height direction, and the thickness of the wedge-shaped ribs gradually decreases from top to bottom.

[0011] Preferably, the two electrode sheets are embedded in the inner side surfaces of the two side walls of the U-shaped structure, and the area of the electrode sheet is smaller than the area of the side wall of the U-shaped structure; and the PTC thermistor element is tightly clamped between the two electrode sheets.

[0012] Preferably, each of the two electrode plates has a connecting block at its top, and the connecting block extends from the top of the corresponding side wall of the U-shaped structure. The first electrode lug and the second electrode lug are electrically connected to the corresponding electrode plates through the connecting block.

[0013] Preferably, the first electrode ear block and the second electrode ear block are positioned opposite each other in the horizontal plane.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] This utility model's PTC heating assembly eliminates the need for a bracket, insulating pad, and wedge block, instead employing a protective sleeve structure that integrates the functions of an insulating pad, bracket, and wedge block. This not only saves on component manufacturing costs and reduces assembly time but also lowers the dimensional requirements of the heating assembly components, improving assembly efficiency. The protective sleeve and heating shell are connected by a press-fit method, ensuring sufficient electrical contact area between the PTC thermistor element and the electrode plate. This ensures good heat dissipation from the PTC thermistor element, and the press-fit design reduces thermal resistance, achieving higher thermal efficiency.

[0016] This invention also has other beneficial effects, which are described in the embodiments section of the specification and will not be repeated here. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the PTC heating component of this utility model;

[0018] Figure 2 for Figure 1 Top view of the PTC heating assembly;

[0019] Figure 3 for Figure 2 Cross-sectional view of the PTC heating assembly along line AA;

[0020] Figure 4 for Figure 1 A three-dimensional structural diagram of the protective sleeve and its internal components;

[0021] Figure 5 for Figure 4 Top view of the protective sleeve and its internal components;

[0022] Figure 6 for Figure 5 Sectional view of the structure along the BB direction;

[0023] Figure 7 for Figure 5 Cross-sectional view of the structure along the CC direction;

[0024] Figure 8 for Figure 1The middle electrode sheet three-dimensional structure schematic view;

[0025] Figure 9 For Figure 8 The middle electrode sheet and its internal structure sectional view.

[0026] The figure mark: 100, PTC heating assembly;1, heating shell;11, first containing cavity;2, protective sleeve;21, U-shaped structure;22, wedge-shaped rib;23, limiting clamp gap;3, first electrode lug block;4, second electrode lug block;5, electrode sheet;51, connecting block;6, PTC thermistor element. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the following will combine the attached Figures 1-9 The technical scheme of the utility model embodiment is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the described utility model embodiment, all other embodiments obtained by the person skilled in the art belong to the scope of the utility model protection.

[0028] As Figures 1-6 The utility model embodiment provides a novel PTC heating assembly, which comprises a heating shell 1, a protective sleeve 2, a PTC thermistor element 6 and an electrode sheet 5. The heating shell 1 is provided with a first containing cavity 11. The protective sleeve 2 is a U-shaped structure 21 made of insulating material, a limiting clamp gap 23 is formed in the center of the U-shaped structure 21 along the height thereof, a plurality of wedge-shaped ribs 22 are arranged in parallel along the height direction of the two sides of the U-shaped structure 21 respectively, the thickness of the wedge-shaped ribs 22 gradually decreases from top to bottom, the protective sleeve structure integrating the functions of insulating pad, support and wedge-shaped block not only saves the part manufacturing cost, reduces the heating assembly assembly time, but also reduces the size requirement of the heating assembly parts, improves the assembly efficiency. The PTC thermistor element 6 is a sheet structure, the electrode sheet 5 comprises two sheets arranged correspondingly on the two sides of the PTC thermistor element 6, and the two electrode sheets 5 are electrically connected with the first electrode lug block 3 and the second electrode lug block 4 respectively, and the PTC thermistor element 6 and the two electrode sheets 5 are correspondingly embedded in the limiting clamp gap 23. During assembly, the protective sleeve 2 is inserted into the first containing cavity 11 of the heating shell 1, and the protective sleeve and the heating shell are connected by press fitting, so that the PTC thermistor element and the electrode sheet form sufficient electrical contact area, ensure that the heat generated by the PTC thermistor element is well dissipated, and the press fitting of the protective sleeve and the heating shell reduces the thermal resistance, realizes high thermal efficiency.

[0029] In a preferred embodiment, as Figures 6-9As shown, two pieces of electrode sheets are respectively embedded in the inner side 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 pieces of electrode sheets. The two pieces of electrode sheets and the PTC thermistor element are integrally injection molded to form a whole heating assembly, and the specific processing method is as follows: first, the PTC thermistor element is adhered to the two pieces of electrode sheets respectively, and then is placed in a mold to inject an insulating material to make a protective sleeve; the protective sleeve and the internal components are pressed into the first accommodating cavity of the heating shell by using the interference pressing method, and then the gap between the first accommodating cavity and the protective sleeve is filled with heat-conducting glue.

[0030] In a preferred embodiment, as shown in Figures 6-9 The top end of each of the two pieces of electrode sheets is provided with a connecting block 51, and the connecting block 51 penetrates out from the top end of the corresponding side wall of the U-shaped structure 21; the first electrode lug block 3 and the second electrode lug block 4 are electrically connected to the corresponding electrode sheets through the connecting block 51, and the first electrode lug block 3 and the second electrode lug block 4 are arranged in different positions in the horizontal plane, which is beneficial to the wiring of the PTC heating assembly and reduces the risk of short circuit.

[0031] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A novel PTC heating assembly characterized in that, The PTC heating assembly (100) comprises: a heating shell (1) provided with a first accommodating cavity (11) therein; a protective sleeve (2) made of insulating material in a U-shaped structure (21) with a limiting gap (23) formed along the height thereof; the protective sleeve (2) is inserted into the first accommodating cavity (11) of the heating shell (1) correspondingly; a PTC thermistor element (6) in a sheet structure; electrode sheets (5) comprising two sheets arranged correspondingly on the two sides of the PTC thermistor element (6) and respectively electrically connected with the first electrode lug (3) and the second electrode lug (4); wherein the PTC thermistor element (6) and the two electrode sheets (5) are embedded in the limiting gap (23) correspondingly.

2. The novel PTC heating assembly according to claim 1, characterized in that, The two large faces of the U-shaped structure (21) are respectively provided with a plurality of wedge-shaped ribs (22) in parallel along the height thereof, and the thickness of the wedge-shaped ribs (22) gradually decreases from top to bottom.

3. The novel PTC heating assembly according to claim 1, characterized in that, The two electrode sheets are embedded in the inner side faces of the two side walls of the U-shaped structure (21) respectively, and the area of the electrode sheets is smaller than that 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 assembly according to claim 3, characterized in that, The top ends of the two electrode sheets are respectively provided with connecting blocks (51) which pass through the top ends of the corresponding side walls of the U-shaped structure (21), and the first electrode lug (3) and the second electrode lug (4) are electrically connected with the corresponding electrode sheets through the connecting blocks (51).

5. The novel PTC heating assembly according to claim 4, characterized in that, The first electrode lug (3) and the second electrode lug (4) are arranged in different positions in the horizontal plane.

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