CN214592013U

CN214592013U - PTC heating element

Info

Publication number: CN214592013U
Application number: CN202023133567.6U
Authority: CN
Inventors: 黄海霞
Original assignee: Shaoxing Donghang Electronic Technology Co ltd
Current assignee: Shaoxing Donghang Electronic Technology Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-11-02
Anticipated expiration: 2030-12-23

Abstract

The utility model belongs to the technical field of the PTC generates heat, concretely relates to PTC heat-generating body, including the shell with be fixed in the heating element within the shell, heating element includes two electrodes and connects in the heating element of two electrodes, heating element still includes two stereoplasm insulators, and the projection space of two stereoplasm insulators covers heating element's both sides and/or two electrodes respectively. The PTC heating element of the utility model solves the defect of low installation efficiency of the polyimide film insulating sleeve through the design of the hard insulating pieces, and the arrangement of the two hard insulating pieces obviously improves the electrical strength of the PTC heating element, the electrical strength depends on the thickness of the hard insulating pieces, thus the ground wire can be cancelled and the production cost can be reduced; and the assembly is simple, and the production efficiency is high.

Description

PTC heating element

Technical Field

The utility model belongs to the technical field of the PTC generates heat, concretely relates to PTC heat-generating body.

Background

The PTC heating element is an automatic constant temperature and electricity-saving electric heater consisting of a PTC ceramic heating element and an aluminum shell, and has the advantages of low thermal resistance and high heat exchange efficiency. The outstanding characteristics of the PTC heating element are realized on the safety performance, namely, the phenomenon of reddening on the surface of an electric heating tube heater can not be generated under any application condition, so that potential safety hazards such as scalding, fire and the like are easily caused.

At present, a PTC heating element is manufactured by mounting a heating element between two electrode plates, then placing the heating element into an insulating sleeve made of polyimide film with an opening, then mounting the heating element in an aluminum case, and pressing the insulating sleeve by pressure equipment; it is insulated by a polyimide film, and the insulation strength depends on the thickness of the polyimide film. However, the conventional PTC heating element is not high in electrical strength because of the limitation of the thickness of the polyimide film, and a ground wire is required. In addition, the polyimide film is formed by a paper winding machine and is hot-ironed to form an insulating sleeve with an opening at one end, then the electrode plate assembly with the heating sheet is manually arranged in the insulating sleeve, and the opening of the insulating sleeve is not completely opened in a natural state, so that the assembly requirement is high, and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

Based on the above-mentioned weak point that exists among the prior art, one of the purposes of the utility model is to solve one or more of the above-mentioned problem that exists among the prior art at least, in other words, one of the purposes of the utility model is to provide one or more PTC heat-generating body that satisfies one or more of the aforesaid needs.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:

a PTC heating body comprises a shell and a heating component fixed in the shell, wherein the heating component comprises two electrodes and a heating element connected with the two electrodes, the heating component further comprises two hard insulating pieces, and projection spaces of the two hard insulating pieces respectively cover two sides of the heating element and the two electrodes. Through the design of the hard insulating pieces, the defect that the installation efficiency of the polyimide film insulating sleeve is low is overcome, and the electric strength of the PTC heating body is obviously improved due to the arrangement of the two hard insulating pieces.

Preferably, the hard insulating member is at least partially attached to the corresponding heating element and/or electrode. The direct attachment is favorable for heat conduction and improves the heating efficiency.

Preferably, the hard insulating member is made of ceramic or glass, and the thickness of the hard insulating member is 0.5-5 mm. The thickness is too thin and difficult to process, and the insulating property is poor; the thickness is too thick, the heat conductivity is poor, and the heating efficiency is low.

Preferably, the heating assembly further comprises a positioning frame, and the heating element and/or the electrode are mounted on the positioning frame. The heating element or the electrode is installed through the positioning frame, and the installation is simple, convenient and stable.

Preferably, at least part of the hard insulating part is attached to the positioning frame, and at least part of the surface of the hard insulating part protrudes out of the positioning frame. The insulating part is attached to the positioning frame for installation, and the installation is simple, convenient and stable; the surface of the hard insulating part is higher than the positioning frame, the compression joint stress is the hard insulating part, and the positioning frame is not easy to deform.

Preferably, the positioning frame is provided with a first accommodating cavity, the heating element is accommodated in the first accommodating cavity, and/or the positioning frame is provided with a second accommodating cavity, and the electrode is accommodated in the second accommodating cavity. The heating element or the electrode is convenient to mount.

Preferably, the positioning frame has two wiring channels for receiving the wiring terminals of the two electrodes respectively. The leading-out and the assembly of the wiring terminal are convenient.

Preferably, the positioning frame is an annular frame structure, and the shape of the positioning frame is matched with that of the hard insulating piece or the shell. Easily assemble with the shell, promote structural stability and compactedness.

Preferably, the housing is provided with a third accommodating cavity, and the heating component is positioned in the third accommodating cavity; the two sides of the third accommodating cavity are provided with bending positions protruding towards the inside or the outside of the third accommodating cavity; and/or the hard insulating piece is provided with a fourth accommodating cavity, and the heating element and/or the electrode are accommodated in the fourth accommodating cavity. The design of the position of buckling is favorable to the shell to warp the direction under the pressure effect, compresses tightly installation heating element, and heating element receives the pressure little, and is not fragile.

Preferably, the shell is made of iron, aluminum, copper, zinc or alloy.

Compared with the prior art, the utility model, beneficial effect is:

the PTC heating element of the utility model solves the defect of low installation efficiency of the polyimide film insulating sleeve through the design of the hard insulating pieces, and the arrangement of the two hard insulating pieces obviously improves the electrical strength of the PTC heating element, the electrical strength depends on the thickness of the hard insulating pieces, thus the ground wire can be cancelled and the production cost can be reduced; and the assembly is simple, and the production efficiency is high.

Drawings

FIG. 1 is an exploded view of a PTC heating element according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a positioning frame according to embodiment 1 of the present invention;

fig. 3 is a schematic structural view of a heating element according to embodiment 1 of the present invention;

FIG. 4 is a schematic view showing the structure of a PTC heating element according to embodiment 1 of the present invention;

fig. 5 is a sectional view showing the structure of a PTC heating element according to embodiment 1 of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention, the following description will explain embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

Example 1:

as shown in fig. 1 to 5, the PTC heating element of the present embodiment includes a case 1 and a heating element mounted in the case 1. Wherein, shell 1 is the aluminum hull, has and holds chamber 1a, and heating element fixes in holding chamber 1a, and the both sides that hold chamber 1a have towards holding the protruding position 1b of buckling in intracavity portion, are convenient for hold the chamber and warp the direction under the pressure effect to fix heating element in the shell. The material of the case 1 is not limited to aluminum, but may be iron, copper, zinc, an alloy, or the like.

Specifically, the heating assembly comprises an upper electrode plate 2, a lower electrode plate 3 and a heating element 4 clamped between the upper and lower electrode plates, and further comprises a positioning frame 5, an upper ceramic plate 6 and a lower ceramic plate 7.

Wherein, the locating rack 5 is a ring-shaped square frame structure and is made of plastic material. The positioning frame 5 has two wiring channels 5a on one side of the width thereof for receiving the wiring terminals of the two electrode sheets, respectively. Specifically, the wiring channel is of a groove structure, penetrates through the inside and the outside of the positioning frame, and facilitates external wiring of the electrode plate. The connecting terminal of the upper electrode plate 2 is connected with an upper lead 8, and the connecting terminal of the lower electrode plate 3 is connected with a lower lead 9, wherein the connecting mode can adopt the existing common connecting mode, such as riveting, welding and the like; in addition, an insulating protective sleeve 10 is sleeved outside the connecting part of the corresponding connecting terminal and the lead, so that insulating protection is realized. More preferably, insulating protective sheath 10 joint is prevented rocking in corresponding wiring passageway 5a, promotes the stability of electricity connection.

Install last electrode piece 2, lower electrode piece 3 and heating element 4 in locating rack 5 according to the order, then attach last potsherd 6 at the upper surface of last electrode piece 2, lower potsherd 7 is attached at the lower surface of lower electrode piece 3, and at least one potsherd is along the top or the bottom with the local protrusion in locating rack 5 of the attached direction of electrode piece (along the stack direction of electrode piece and potsherd promptly), so design, wrap up heating element and electrode piece completely through potsherd and locating rack, then whole heating element packs into the chamber 1a that holds of shell, pressure forming under pressure equipment, thereby firmly fix heating element in the chamber that holds of shell. Therefore, the distance from the shell to the electrode plate is actually the thickness of the ceramic plate, the electrical strength completely depends on the thickness of the ceramic plate, the electrical strength is effectively improved, and more stable use power can be provided.

At least one ceramic plate partially protrudes out of the top or the bottom of the positioning frame 5 along the attaching direction of the electrode plate (i.e. along the stacking direction of the electrode plate and the ceramic plate), so as to avoid the deformation of the positioning frame caused by the contact between the positioning frame and the shell in the pressing process. In addition, the thickness of the ceramic wafer is 0.5-5 mm, the ceramic wafer is too thin and difficult to process, and the insulating property is poor; the thickness is too thick, the heat conductivity is poor, and the heating efficiency is low.

Each ceramic plate of the embodiment completely covers the corresponding electrode plate, namely the size of the ceramic plate is larger than that of the electrode plate, so that the electrical strength and the electrical stability of the PTC heating element are ensured.

Example 2:

the PTC heating element of this embodiment is different from embodiment 1 in that:

the ceramic sheet used as the hard insulating member in embodiment 1 is not limited to a sheet structure, and may be in any shape, and only needs to be attached to the corresponding electrode or heating element, or both the electrode and the heating element, so as to meet the requirements of different applications. The material is not limited to ceramics, and may be a hard insulating material such as glass. The hard insulating part can also be directly formed with an accommodating cavity in the process of machining and forming, is used for accommodating a heating element and/or an electrode, and is convenient to install.

Other structures can refer to embodiment 1.

Example 3:

the positioning frame is only used for positioning the heating element or the electrode, so that the heating element or the electrode is simple, convenient and stable to mount, and the requirements of different application occasions are met.

Other structures can refer to embodiment 1.

Example 4:

the positioning frame is provided with a first accommodating cavity and a second accommodating cavity which are respectively used for accommodating the heating element and the electrode; or the positioning frame is only provided with one accommodating cavity for accommodating the heating element or the electrode; the diversification of the positioning structure is realized so as to meet the requirements of different application occasions.

Other structures can refer to embodiment 1.

Example 5:

the bending positions on the two sides of the accommodating cavity can protrude towards the outside of the accommodating cavity, the deformation guide of the shell under the action of pressure can be realized, and the structural diversification is realized so as to meet the requirements of different application occasions.

Other structures can refer to embodiment 1.

Example 6:

two wiring channels can also be distributed on two sides of the positioning frame, and the requirements of different application occasions are met.

Other structures can refer to embodiment 1.

Example 7:

the locating rack can also be in an annular frame structure such as a circular frame structure, an elliptical frame structure and the like, and accordingly, the structures of the electrode plate and the ceramic wafer are matched with the locating rack, so that structural diversification of the heating assembly is realized, and the requirements of different application occasions are met.

Other structures can refer to embodiment 1.

Example 8:

when the size of the electrode plate is smaller than that of the heating element, the ceramic plate serving as the hard insulating part is attached to the heating element and the electrode, so that structural diversification of the heating assembly is realized, and the requirements of different application occasions are met.

Other structures can refer to embodiment 1.

The foregoing has been a detailed description of the preferred embodiments and principles of the present invention, and it will be apparent to those skilled in the art that variations may be made in the specific embodiments based on the concepts of the present invention, and such variations are considered as within the scope of the present invention.

Claims

1. A PTC heating body comprises a shell and a heating component fixed in the shell, wherein the heating component comprises two electrodes and a heating element connected with the two electrodes.

2. A PTC heating body according to claim 1, wherein the hard insulating members are at least partially attached to the corresponding heating elements and/or electrodes.

3. A PTC heating element according to claim 1, wherein the hard insulating material is made of ceramic or glass and has a thickness of 0.5 to 5 mm.

4. A PTC heating body according to any one of claims 1 to 3, wherein the heating element further comprises a positioning frame, and the heating element and/or the electrode is mounted to the positioning frame.

5. A PTC heating element according to claim 4, wherein the hard insulating member is at least partially attached to a positioning frame, and at least part of the surface of the hard insulating member protrudes from the positioning frame.

6. A PTC heating body according to claim 4, wherein the positioning frame is provided with a first receiving chamber in which the heating element is received, and/or a second receiving chamber in which the electrode is received.

7. A PTC heating element according to claim 4, wherein the positioning frame has two wiring passages for receiving terminals of the two electrodes, respectively.

8. A PTC heating element according to claim 4, wherein the positioning frame is a ring-shaped frame structure, and the shape of the frame is adapted to a hard insulating member or a case.

9. A PTC heating body according to claim 1, wherein the case has a third accommodating chamber, the heating element is located in the third accommodating chamber, and both sides of the third accommodating chamber have bent positions protruding toward the inside or outside of the third accommodating chamber; and/or the hard insulating piece is provided with a fourth accommodating cavity, and the heating element and/or the electrode are accommodated in the fourth accommodating cavity.

10. A PTC heating body according to claim 1 or 9, wherein the material of the case is iron, aluminum, copper, zinc or an alloy.