CN209845329U - Non-circular heater - Google Patents

Abstract

The utility model discloses a non-circular heater, including annular shell, heating plate, inner electrode and outer electrode, the interval is provided with the plane changeover portion on the shell, the draw-in groove has been seted up on the plane changeover portion, the heating plate is installed in the draw-in groove, install in annular shell, the interval is provided with the boss with the draw-in groove adaptation on the inner electrode, the outer electrode is installed outside annular shell, the interval is provided with the concave station with the draw-in groove adaptation on the outer electrode. The utility model discloses set up local plane transition in the place of electrode and PTC heating plate contact for the contact surface between PTC and the electrode is level and smooth, and convenient fixed guarantees electric contact and heat-conducting stability.

Description

Non-circular heater

Technical Field

The utility model relates to a heater, concretely relates to non-circular heater.

Background

The traditional circular heater is structurally difficult to realize the better laminating of heating plate and electrode large tracts of land to the electrode can appear very high stress in the part with the PTC contact and can't realize leveling, make unable good contact between heating plate and the electrode lead to heat conductivility greatly reduced, and the PTC heating plate is ceramic material, uses the locking mode of tension on the position of relatively narrow and small space and stress concentration, can lead to the PTC cracked, increases the assembly degree of difficulty and manufacturing cost.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a non-circular heater solves the unable good contact of motor and PTC, the problem of stress unevenness appears easily.

The technical scheme is as follows: non-circular heater, including annular shell, heating plate, inner electrode and outer electrode, the interval is provided with the plane changeover portion on the shell, the draw-in groove has been seted up on the plane changeover portion, the heating plate is installed in the draw-in groove, install in annular shell, the interval is provided with the boss with the draw-in groove adaptation on the inner electrode, the outer electrode is installed outside annular shell, the interval is provided with the concave station with the draw-in groove adaptation on the outer electrode.

The heating plate, the inner electrode and the outer electrode card are fixed in the clamping groove through plastic buckles. The heating plate is a PTC heating plate.

In order to increase the contact area, the boss surface is a flat surface adapted to the PTC heater chip. The concave surface is a plane matched with the PTC heating sheet.

Has the advantages that: the utility model discloses set up local plane transition in the place of electrode and PTC heating plate contact for the contact surface between PTC and the electrode is level and smooth, and convenient fixed guarantees electric contact and heat-conducting stability. The PTC heater plate has good surface contact with the inner electrode and the outer electrode, can solve the problem that the current round shape cannot be in good contact, improves the area of electric contact, simultaneously ensures that heat conduction is better, and improves the heating efficiency of the heater. In the non-circular structure, the product placed in the tank body has the advantages that due to the fact that the PTC and the inner wall of the tank body are spaced by a certain position due to the local plane, fluid can flow through one side of the outer electrode, compared with a circular shell, PTC heat is dissipated through the inner wall of the tank body, the non-circular structure is equivalent to increase of the thermal contact area, heat loss is reduced, and efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a partial assembly structure of the present invention;

FIG. 3 is a schematic structural view of a plastic housing;

FIG. 4 is a schematic diagram of an outer electrode structure;

FIG. 5 is a schematic view of a heater chip configuration;

fig. 6 is a schematic view of a plastic snap structure.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 6, the non-circular heater includes an annular housing 1, a heating plate 3, an inner electrode 5 and an outer electrode 2, wherein a planar transition section is arranged on the housing at intervals, a clamping groove is formed on the planar transition section, the PTC heating plate 1 is installed in the clamping groove and installed in the annular housing, a boss adapted to the clamping groove is arranged on the inner electrode 5 at intervals, the surface of the boss is a plane adapted to the heating plate, the outer electrode is installed outside the annular housing, a concave platform adapted to the clamping groove is arranged on the outer electrode at intervals, and the surface of the concave platform is a plane adapted to the PTC heating plate. The heating plate, the inner electrode 5 and the outer electrode 2 are fixed in the clamping groove through a plastic buckle 5.

Use the utility model discloses the time, under the circular telegram condition, heat for the inside diesel oil of circulation ring, adopt the annular design of non-circular, design out local plane transition in the place of electrode and PTC heating plate contact for contact surface between PTC and the electrode is level and smooth, can provide more possible fastening schemes like this, guarantees electric contact and heat-conducting stability. In a product with a circular structure, due to structural problems, the contact area is small, sometimes even the contact is poor, ablation is generated under the condition that large current passes through, the situation that electrodes are burnt out excessively occurs on the poor contact surface in a product which is not improved before, so that safe use is ensured, and good contact is a necessary condition.

The performance of the circular ring heater and the non-circular ring heater is detected by an American FLIR infrared thermal imager, and the comparison data is as follows:

TABLE 1 Infrared thermography data acquisition and comparison table

It can be derived from FLIR thermal imaging device data acquisition contrast that under the same conditions, non-circular structure is superior to circular structure in the temperature that generates heat, and the temperature difference that produces benefits from the local plane of PTC contact part, and the plane contact provides good area of contact, and PTC generates heat more stably under the good condition of heat conduction and electricity conduction to also reduce circular structure because contact is bad greatly, the risk of the possible electrode of burning out of production.

Claims (5)

1. The utility model provides a non-circular heater, its characterized in that, includes annular shell (1), heating plate (3), inner electrode (5) and outer electrode (2), the interval is provided with the plane changeover portion on annular shell (1), the draw-in groove has been seted up on the plane changeover portion, install in the draw-in groove heating plate (3), the inner electrode is installed in annular shell, the interval is provided with the boss with the draw-in groove adaptation on inner electrode (5), outer electrode (2) are installed outside annular shell (1), the interval is provided with the concave station with the draw-in groove adaptation on outer electrode (2).

2. The non-circular heater according to claim 1, wherein the heating plate (3), the inner electrode (5) and the outer electrode (2) are clamped in the clamping groove by plastic clamping buckles (4).

3. The non-circular heater according to claim 1, wherein the heater chip (3) is a PTC heater chip.

4. The non-circular heater of claim 3, wherein the boss surface is planar to mate with a PTC heating plate.

5. The non-circular heater of claim 3, wherein the recessed land surface is a flat surface that mates with a PTC heating plate.