Novel PTC heating device

Abstract

The utility model discloses a novel PTC (Positive Temperature Coefficient) heating device, which belongs to the technical field of electric heating and comprises a heating shell, a protective sleeve, a PTC thermistor element, an electrode plate and an insulating film, a first accommodating cavity is arranged in the heating shell, a second accommodating cavity is arranged in the protective sleeve, 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. According to the utility model, the assembly efficiency and the heat transfer performance of the PTC heating device can be improved.

Description

Technical Field

[0001] This utility model relates to the field of electric heating technology, and in particular to a novel PTC heating device. Background Technology

[0002] Conventional PTC heating devices have a PTC thermistor element, which is usually connected to two conductors in a conductive manner. The two conductors are set and configured to supply power to the PTC thermistor element with different polarities. At the same time, the PTC heating device needs to have an insulator covering the PTC thermistor element. The connection between the heating device and the housing is usually achieved by potting and pressing with fixing blocks. This technical solution uses glue potting, which is inefficient in assembly. Utility Model Content

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

[0004] Technical solution: The present invention provides a novel PTC heating device, comprising:

[0005] A heating shell, wherein a first receiving cavity is provided inside the heating shell;

[0006] A protective sleeve, wherein a second receiving cavity is provided inside the protective sleeve, and the protective sleeve is correspondingly inserted into the first receiving cavity of the heating shell;

[0007] PTC thermistor element, wherein the PTC thermistor element has a chip structure;

[0008] The electrode sheet includes two electrodes that are correspondingly attached to the large surfaces on both sides of the PTC thermistor element, and the two electrode sheets are electrically connected to the first electrode lug and the second electrode lug, respectively.

[0009] An insulating film is provided to seal and cover the PTC thermistor element and the two electrode plates around its perimeter.

[0010] The PTC thermistor element covered with an insulating film and its two electrode plates are inserted into the second receiving cavity inside the protective sleeve.

[0011] Preferably, the protective sleeve has a wedge-shaped structure; the shape of the first receiving cavity is adapted to the shape of the protective sleeve.

[0012] Preferably, the protective sleeve has limiting grooves or limiting protrusions at both ends along the height direction, and the inner wall of the first receiving cavity is provided with matching limiting grooves or limiting protrusions corresponding to the protective sleeve.

[0013] Preferably, the first electrode ear block and the second electrode ear block are disposed in opposite positions in the horizontal plane, and the first electrode ear block and the second electrode ear block are disposed in opposite positions in the height direction.

[0014] Preferably, the heating housing includes a housing and a corresponding support flange disposed at the top of the housing.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The PTC thermistor element and the heating shell of this utility model are insulated; the protective sleeve and the heating shell are connected by press fitting, so that the PTC thermistor element and the electrode plate form a sufficient electrical contact area, ensuring good heat dissipation of the heat generated by the PTC thermistor element, and the press fitting of the protective sleeve and the heating shell reduces thermal resistance and achieves high thermal efficiency.

[0017] 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

[0018] Figure 1 This is a cross-sectional view of the PTC heating device of this utility model along its width.

[0019] Figure 2 for Figure 1 Top view of the structure of the PTC heating device;

[0020] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the protective sleeve.

[0021] Reference numerals: 100, PTC heating device; 1, heating shell; 11, housing; 12, supporting flange; 13, first receiving cavity; 14, limiting protrusion; 2, protective sleeve; 21, second receiving cavity; 22, limiting groove; 3, insulating film; 4, electrode plate; 5, PTC thermistor element; 6, first electrode lug; 7, second electrode lug. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings. Figures 1-3 The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0023] like Figure 1As shown in the figure, a novel PTC heating device according to an embodiment of the present invention includes a heating shell 1, a protective sleeve 2, a PTC thermistor element 5, an electrode plate 4, and an insulating film 3. The heating shell 1 includes a housing 11 and a support flange 12 correspondingly disposed at the top of the housing 11, and a first receiving cavity 13 is provided inside the heating shell 1. The protective sleeve 2 is provided inside a second receiving cavity 21, and the protective sleeve 2 is correspondingly inserted into the first receiving cavity 13 of the heating shell 1. The PTC thermistor element 5 has a sheet-like structure. The electrode plates 4 include two plates correspondingly attached to the large surfaces on both sides of the PTC thermistor element 5, and the two electrode plates 4 are electrically connected to the first electrode lug 6 and the second electrode lug 7, respectively. An insulating film 3 seals and covers the PTC thermistor element 5 and the two electrode plates 4 around them. The PTC thermistor element 5 covered with the insulating film 3 and the two electrode plates 4 are inserted into the second receiving cavity 21 inside the protective sleeve 2. The protective sleeve 2 and its internal components are inserted into the first receiving cavity 13 of the heating shell 1. In this invention, the PTC thermistor element 5 and the heating shell 11 are insulated. The protective sleeve 2 and the heating shell 1 are connected by a press-fit method, ensuring sufficient electrical contact area between the PTC thermistor element 5 and the electrode plates 4, guaranteeing good heat dissipation from the PTC thermistor element 5. Furthermore, the press-fitting of the protective sleeve 2 and the heating shell 1 reduces thermal resistance, achieving higher thermal efficiency.

[0024] In a preferred embodiment, such as Figures 1-3 As shown, the protective sleeve 2 has a wedge-shaped structure, and the shape of the first receiving cavity 13 is adapted to the shape of the protective sleeve 2. This structure allows the protective sleeve 2 and its internal components to be conveniently and efficiently inserted into the heating shell 1.

[0025] In a more preferred embodiment, such as Figures 2-3 As shown, the protective sleeve 2 has limiting grooves 22 or limiting protrusions 14 at both ends along the height direction. The inner wall of the first receiving cavity 13 is provided with matching limiting grooves 22 or limiting protrusions 14 corresponding to the protective sleeve 2. If the protective sleeve 2 has limiting grooves 22 at both ends along the height direction, then the inner wall of the first receiving cavity 13 is provided with matching limiting protrusions 14 corresponding to the protective sleeve 2, and vice versa. This arrangement can improve the connection efficiency and stability between the protective sleeve 2 and its internal components and the heating shell 1.

[0026] In a preferred embodiment, such as Figure 1 As shown, the first electrode lug 6 and the second electrode lug 7 are positioned out of position in the horizontal plane, and are also positioned out of position in the vertical direction. This arrangement is beneficial for the two electrode plates of the PTC heating device to be connected to the corresponding copper busbars, so that power can be supplied to the PTC heating device through the copper busbars, thereby reducing the risk of short circuit.

[0027] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A novel PTC heating device, characterized in that, The PTC heating device (100) includes: Heating shell (1), wherein a first receiving cavity (13) is provided inside the heating shell (1); The protective sleeve (2) has a second receiving cavity (21) inside, and the protective sleeve (2) is inserted into the first receiving cavity (13) of the heating shell (1); PTC thermistor element (5), wherein the PTC thermistor element (5) is a chip structure; Electrode sheet (4), the electrode sheet (4) includes two pieces that are correspondingly attached to 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 lug (6) and the second electrode lug (7) respectively; An insulating film (3) is sealed around the PTC thermistor element (5) and the two electrode plates (4); Among them, the PTC thermistor element (5) covered with insulating film (3) and the two electrode plates (4) are inserted into the second receiving cavity (21) inside the protective sleeve (2).

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

3. The novel PTC heating device according to claim 2, characterized in that, The protective sleeve (2) has a limiting groove (22) or a limiting protrusion (14) at both ends along the height direction. The inner wall of the first accommodating cavity (13) is provided with a matching limiting groove (22) or limiting protrusion (14) corresponding to the protective sleeve (2).

4. The novel PTC heating device according to claim 1, characterized in that, The first electrode ear block (6) and the second electrode ear block (7) are positioned opposite each other in the horizontal plane, and the first electrode ear block (6) and the second electrode ear block (7) are positioned opposite each other in the height direction.

5. The novel PTC heating device according to any one of claims 1 to 4, characterized in that, The heating shell (1) includes a shell (11) and a support flange (12) corresponding to the top of the shell (11).

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