CN201319675Y

CN201319675Y - PTC ceramic tubular electric heating element

Info

Publication number: CN201319675Y
Application number: CNU2008202010065U
Authority: CN
Inventors: 魏均倚
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-24
Filing date: 2008-09-24
Publication date: 2009-09-30
Anticipated expiration: 2018-09-24

Abstract

The utility model relates to a PTC ceramic tubular electric heating element, which comprises a heating body, electrode clips, an insulating layer, a section and a metal sleeve which are tightly arranged orderly from the middle to the outside; wherein, a plurality of PTC ceramic heating plates are orderly arranged to form the strip-shaped heating body; the upper and the lower surfaces of each PTC ceramic heating plate are respectively electrically connected with the corresponding electrode clip; and the outer surface of the section is a cambered surface which is matched with the inner surface of the metal sleeve. The structure of the design is compact; the heat efficiency is high; since the heating body is formed by a plurality of PTC ceramic heating plates, during the operation, the applicable voltage range is wide, the operating current is stable, the tubular electric heating element in a dry heating state cannot cause overhigh temperature or damage the heating element, and therefore, the tubular electric heating element can be safely used and is durable.

Description

A kind of PTC ceramic electrical heating tube

Technical field

The utility model relates to electric calorifie installation, particularly a kind of PTC ceramic electrical heating tube.

Background technology

Electrothermal tube is that electric energy converts one of main electrical appliance of heat energy to, difference according to the application scenario, the electrothermal tube that various ways is arranged, electrothermal tubes such as metal, quartz, enamel, carbon fiber are arranged, wherein most widely used electric metal electrothermal tube, exothermic material adopts nickel filament or siderochrome silk, and fill insulant forms in pipe, and that its shortcoming is that heat is imitated is low, power consumption big, poor safety performance, lifetime weak point, burn out easily.To this, the technical staff constantly explores improvement, proposes various technical schemes, makes the performance of electrothermal tube that very big improvement arranged, but still has improvements in actual applications.

The utility model content

In order to overcome the deficiencies in the prior art, it is the electrothermal tube of heater with the PTC potsherd that the utility model provides a kind of, its compact conformation, heat efficiency height, safety durable.

The technical scheme that the utility model adopted is:

A kind of PTC ceramic electrical heating tube, comprise the calandria, electrode intermediate plate, insulating barrier, section bar and the metal sleeve that closely are provided with successively outward by the centre, described calandria is arranged in order by polylith PTC ceramic heating flake forms strip, the upper and lower surface of PTC ceramic heating flake is electrically connected with corresponding electrode intermediate plate respectively, and the outer surface of described section bar is the cambered surface that the inner surface with metal sleeve adapts.

The utility model further improves, and the outer surface of described section bar is provided with groove.

The beneficial effects of the utility model are: electrothermal tube is formed by calandria, electrode intermediate plate, insulating barrier, section bar and the tight pressing of metal sleeve, the outer surface of described section bar is the cambered surface that the inner surface with metal sleeve adapts, its compact conformation, heat-transfer effect is good, in addition, because calandria is made up of polylith PTC ceramic heating flake, the voltage range that is suitable for when work is wide, operating current is stable, and electrothermal tube is can temperature rise when dry-fire condition not too high or damage electric heating element, and is safe in utilization; Can dispose simultaneously the PTC ceramic heating flake of varying number, different temperature-limited values according to power requirement; In addition, when producing, all install after inside the metal sleeve when all parts, for the heat-transfer effect that makes electrothermal tube better, need carry out mechanical compress to outer field metal sleeve, make the diameter of metal sleeve diminish, make the contact-making surface between each part tightr, in order to ensure when extruding is tightened up, not causing the PTC ceramic heating flake to be damaged by pressure, the design is provided with groove at the outer surface of section bar, make that the section bar outer surface has the certain deformation space when extruding, when improving heat transfer efficiency, can guarantee the quality of product again.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the partial sectional view of electrothermal tube;

Fig. 3 is the cross section enlarged diagram of electrothermal tube;

Fig. 4 is the STRUCTURE DECOMPOSITION schematic diagram of electrothermal tube.

Embodiment

Referring to figs. 1 through Fig. 4, a kind of PTC ceramic electrical heating tube, calandria in the middle of it comprises, described calandria is arranged in order by polylith PTC ceramic heating flake 1 forms strip, on PTC ceramic heating flake 1, lower surface is pressed with electrode intermediate plate 2 respectively, on the PTC ceramic heating flake 1, lower surface forms with corresponding electrode intermediate plate 2 respectively and is electrically connected, coat one deck insulating barrier 3 in the outside of above-mentioned assembly again, the top of insulating barrier 3 and bottom are pressed with section bar 4 respectively, at last metal sleeve 5 is put in above-mentioned part combination, metal sleeve 5 is shunk, make each contact-making surface formation electrothermal tube that closely cooperates mutually, the outer surface of described section bar 4 is cambered surfaces that the inner surface with metal sleeve 5 adapts, and makes the better effects if of transmission of heat by contact.The design's compact conformation, because calandria is made up of polylith PTC ceramic heating flake 1, the voltage range that is suitable for when work is wide, and operating current is stable, and electrothermal tube can the too high or damage electric heating element of temperature rise when dry-fire condition, and is safe in utilization; Can dispose simultaneously the PTC ceramic heating flake of varying number, different temperature-limited values according to the needs of power requirement or different use occasions.

When producing, all install after inside the metal sleeve when all parts, for the heat-transfer effect that makes electrothermal tube better, need carry out mechanical compress to outer field metal sleeve 5, make the diameter of metal sleeve 5 diminish, metal sleeve 5 its pressure when shrinking makes the contact-making surface between each part tightr, in order to ensure when extruding is tightened up, not causing PTC ceramic heating flake 1 to be damaged by pressure, the design is provided with groove 41 at the outer surface of section bar 4, make that section bar 5 outer surfaces have the certain deformation space when extruding, when improving heat transfer efficiency, can guarantee the quality of product again.

Further, the design's PTC ceramic heating flake 1 is considered the characteristic of expanding with heat and contract with cold of this element when arranging, between every adjacent PTC ceramic heating flake 1, remain with certain clearance 11, when heating work, can not damage by pressure mutually between the adjacent PTC ceramic heating flake 1, make more reasonable structure because of expansion.

The electrode intermediate plate is used to connect power supply and PTC ceramic heating flake, the heat that PTC ceramic heating flake 1 sends when energising work sees through electrode intermediate plate 2 and reaches outer field section bar 4, described electrode intermediate plate 2 adopts and conducts heat and the good aluminium electrode slice of conductive effect, in addition, also can adopt scale copper or other metal material.

Similarly, described section bar 4 also can adopt heat-transfer effect good, and has the copper material or the aluminium of certain distortion.

The above be the utility model preferred embodiment, it does not constitute the restriction to the utility model protection range, so long as realize that with essentially identical means the purpose of this utility model all should belong to protection range of the present utility model.

Claims

1. PTC ceramic electrical heating tube, it is characterized in that: this electrothermal tube comprises calandria, electrode intermediate plate (2), insulating barrier (3), section bar (4) and the metal sleeve (5) that closely is provided with successively outward by the centre, described calandria is arranged in order by polylith PTC ceramic heating flake (1) forms strip, the upper and lower surface of PTC ceramic heating flake (1) is electrically connected with corresponding electrode intermediate plate (2) respectively, and the outer surface of described section bar (4) is the cambered surface that the inner surface with metal sleeve (5) adapts.

2. a kind of PTC ceramic electrical heating tube according to claim 1 is characterized in that: the outer surface of described section bar (4) is provided with groove (41).

3. a kind of PTC ceramic electrical heating tube according to claim 1 is characterized in that: be provided with gap (11) between every adjacent PTC ceramic heating flake (1).

4. according to claim 1,2 or 3 described a kind of PTC ceramic electrical heating tubes, it is characterized in that: described electrode intermediate plate (2) is the aluminium electrode slice.

5. according to claim 1,2 or 3 described a kind of PTC ceramic electrical heating tubes, it is characterized in that: described section bar (4) is copper material or aluminium.