阅读说明：本技术 一种陶瓷电热塞 (Ceramic electric heating plug ) 是由 雷彼得 于 2021-09-29 设计创作，主要内容包括：本申请涉及发动机电热装置技术领域,公开了一种陶瓷电热塞,包括壳体和发热体,所述发热体设置在所述壳体内部,正极导线与所述发热体顶部连接,所述壳体包括上壳体和下壳体,正极导线和负极导线同时穿过所述上壳体,所述负极导线与发热体连接。具有抗电磁干扰的优点。(The application relates to the technical field of engine electric heating devices, and discloses a ceramic glow plug, including casing and heat-generating body, the heat-generating body sets up inside the casing, positive wire with the heat-generating body top is connected, the casing includes casing and lower casing, and positive wire and negative wire pass simultaneously go up the casing, the negative wire is connected with the heat-generating body. Has the advantage of anti-electromagnetic interference.)

1. The utility model provides a ceramic glow plug, includes casing and heat-generating body (2), heat-generating body (2) set up inside the casing, anodal wire (5) with heat-generating body (2) top is connected, its characterized in that: the shell comprises an upper shell (3) and a lower shell (1), a positive electrode lead (5) and a negative electrode lead (4) penetrate through the upper shell (1) at the same time, and the negative electrode lead (4) is connected with the heating body (2).

2. The ceramic glow plug of claim 1, wherein: the lower shell (1) is provided with a notch (6).

3. The ceramic glow plug of claim 2, wherein: the notch (6) is arranged at the top of the lower shell (1).

4. The ceramic glow plug of claim 3, wherein: the negative electrode lead (4) penetrates through the notch (6) to be in conductive connection with the middle part of the heating body (2).

5. The ceramic glow plug of claim 1 or 4, wherein: an insulating layer is arranged between the heating body (2) and the lower shell (1).

6. The ceramic glow plug of claim 5, wherein: an insulating layer is arranged between the heating body (2) and the upper shell (3).

7. The ceramic glow plug of claim 1, wherein: and insulating materials are filled in gaps between the heating body (2) and the upper shell (3).

8. A ceramic glow plug according to claim 2 or 3, wherein: the upper shell (3) wraps the notch (6).

Technical Field

The invention relates to the technical field of engine electric heating devices, in particular to a ceramic glow plug.

Background

The conventional glow plug of diesel engine or burner adopts single wire structure, and the metal shell body connected with equipment body is connected with negative pole of power supply to form loop, for example, the patent with application number of CN96230894.3 discloses a ceramic glow plug, which comprises shell body, metal cap, heating wire and heating body, and the wire is connected with metal cap, and formed into loop with shell body to make heating body be electrified. Also, for example, US5880432A discloses a ceramic heating device, which adopts a single-wire structure, and forms a loop by conducting electricity through a housing, so that the ceramic heater generates heat.

Disclosure of Invention

The invention aims to provide a ceramic glow plug to solve the problem of electromagnetic interference.

In order to achieve the above object, the present invention adopts the following technical solutions.

The utility model provides a ceramic glow plug, includes casing and heat-generating body, the heat-generating body sets up inside the casing, anodal wire with the heat-generating body top is connected its characterized in that: the shell comprises an upper shell and a lower shell, the positive electrode lead and the negative electrode lead penetrate through the upper shell simultaneously, and the negative electrode lead is connected with the heating body.

In order to facilitate the connection of the negative electrode lead to the heating body, a notch is provided on the lower case.

Further, the notch is arranged at the top of the lower shell.

Furthermore, the negative electrode lead penetrates through the notch to be in conductive connection with the middle of the heating body.

In order to stabilize the heating element and simultaneously avoid the contact between the negative electrode lead and the shell from interfering, an insulating layer is arranged between the heating element and the lower shell.

Further, an insulating layer is arranged between the heating body and the upper shell.

Furthermore, the gap between the heating body and the upper shell is filled with insulating materials.

In order to keep the integral appearance complete, the lower shell is connected with the upper shell in a matching mode, and the upper shell wraps the notch of the lower shell.

Has the advantages that: the ceramic glow plug provided by the invention solves the problem of electromagnetic interference electrodes, the electromagnetic interference is generated by any conduction or under the action of electromagnetic field accompanied by voltage and current and can reduce the performance of a certain device, equipment or system, a double-wire system structure is adopted, the positive electrode and the negative electrode are completely isolated from the shell, a circuit to be protected is wrapped in the shell, the interference of an electric field or a magnetic field can be effectively prevented, meanwhile, the two electrodes are electrified to prevent short circuit, and parts such as a wiring terminal, an insulating ring and the like of a single wire system are removed, so that the structure is simpler.

Drawings

FIG. 1 is a sectional view of a ceramic glow plug according to example 1;

FIG. 2 is a three-dimensional schematic view of a ceramic glow plug;

FIG. 3 is a schematic structural view of the lower case;

FIG. 4 is a cross-sectional view of the upper housing;

reference numerals: 1. a lower housing; 2. a heating element; 3. an upper housing; 4. a negative electrode lead; 5. a positive electrode lead; 6. a notch.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the following embodiments are only used for understanding the principle of the present invention and the core idea thereof, and do not limit the scope of the present invention. It should be noted that modifications to the invention as described herein, which do not depart from the principles of the invention, are intended to be within the scope of the claims which follow.

Examples

As shown in fig. 1, 2, 3 and 4, a ceramic glow plug comprises a shell and a heating body 2, the heating body 2 is arranged inside the shell, the shell comprises an upper shell 3 and a lower shell 1, an anode lead 5 and a cathode lead 4 are led in from the upper part of the upper shell 3, the upper shell 3 wraps the anode lead 5 and the cathode lead 4 simultaneously, the anode lead 5 is connected with the top of the heating body 2, the cathode lead 4 is connected with the middle part of the heating body 2, and when the anode lead and the cathode lead are electrified, the heating body 2 forms a loop so that the heating body 2 is rapidly heated.

The top of the lower shell body 1 is provided with a notch 6, the negative electrode wire 4 penetrates through the notch 6 and is welded at the middle part of the heating body 2, the notch 6 provides a channel for connecting the negative electrode wire 4 and the heating body 2, high temperature is generated during welding to melt the negative electrode wire 4 and the heating body 2 and can generate welding spots, the notch 6 provides a space for accommodating the welding spots generated when the negative electrode wire 4 is welded on the heating body 2, the welding is firmer, the conductive capability of the welding is more stable, the traditional single wire system wiring terminal is replaced, and the structure is simpler.

During casting, a ceramic insulating layer is arranged between the heating element 2 and the upper shell 3 and between the heating element and the lower shell 1, the ceramic insulating layer can connect the heating element 2 with the upper shell 3 and the lower shell 1 together and has the functions of isolating the non-conducting, a gap between the heating element 2 and the upper shell 3 is filled with an insulating ceramic cementing material, the ceramic cementing material is heated and gradually solidified to isolate the heating element 2 from the upper shell 3, and a positive and negative electrode wire is wrapped to protect the wire.

The notch is matched with the upper shell 3, and the notch 6 is wrapped by the interface of the upper shell 3, so that the whole appearance is kept complete.

In a severe cold period, when a diesel engine is cooled, a ceramic glow plug is screwed into each combustion chamber wall of the engine, the ceramic glow plug provides heat for improving starting performance, meanwhile, the ceramic glow plug is required to have the characteristics of rapid temperature rise and lasting high-temperature state maintenance, a low-voltage power supply is connected on a positive lead and a negative lead before the engine is started, when current flows through the heating body 2, the heating body 2 is in a red hot state, combustible mixed gas entering a cylinder is compressed when a piston rises, the temperature rises immediately, and the heat of the ceramic glow plug reaches the spontaneous combustion point of the mixed gas, so that the mixed gas starts to combust to generate high-temperature high-pressure gas to push the piston to do work.