CN2176625Y

CN2176625Y - Electric heating sheet

Info

Publication number: CN2176625Y
Application number: CN 93244889
Authority: CN
Inventors: 屠卫东
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-22
Filing date: 1993-11-22
Publication date: 1994-09-07
Anticipated expiration: 2003-11-22

Abstract

The utility model relates to an electric heating element, particularly a flaky electric heating element using high molecular materials with positive temperature coefficient (abbreviation is PTC) as a heating element, which is used for the field of large area heating and thermal insulation. The utility model is characterized in that two electric conduction poles fixed on the surface layer of flaky high molecular PTC materials integrally covered by insulation heat conducting materials or in the flaky high molecular PTC materials are in multi-row arrangement. Heat conducting pores are arranged on the PTC materials, and one side of the PTC materials covered by the insulation heat conducting materials are laid with an insulation thermal insulation layer. The utility model has the advantages of automatic constant temperature, self-regulated power and large heated area. Various shapes are arranged to adapt to a heated object, and the flaky electric heating element can be fixed on the heated object by a fixing and connecting piece of the flaky electric heating element.

Description

Electric heating sheet

The utility model relates to electric heating element, particularly with high molecular positive temperature coefficient (be called for short: PTC) material, as the sheet electrical heating element of heater element.

The heater element of traditional electric heater generally is to adopt metallic resistance material as heater, and its resistivity varies with temperature not quite, therefore its power is constant basically, change or stable temperature as required power, just must add control appliance, as temperature-sensing element, relay element etc.Abroad invented the beginning of the sixties with low pressure polyethylene filling carbon black and made polymer composite, found that its resistivity has positive temperature coefficient (Positive Temperature Coeffscient) characteristic, be called for short ptc material with conducting function.Its resistivity is directly proportional with temperature, and sharply increases several magnitude at specific warm area, to such an extent as to the blocking-up electric current has the characteristic of thermoswitch.This specific warm area is called the switch temperature (TS) of ptc material, and this (TS) temperature is with the technology of material and prescription and difference, and has determined this automatic maximum heating temperature (TR) that limits by the made heating element of ptc material therefrom.Domestic research about the high molecular PTC material has also obtained a lot of achievements with application since the eighties.As China's invention 87102932, invent 8710-2924 etc. about the China that the high molecular PTC material is used about ptc material itself.And to develop (TR) in succession be that the commodity of seriations such as 65 degree, 70 degree, 80 degree, 105 degree are from the siding temperaturing heating belt product.Because this heating tape has automatic constant-temperature, the property of power self-regulated has been widely used in numerous heat tracings field.But in use it is found that and thisly only lay the high molecular PTC material from siding temperaturing heating belt and constitute by two parallel poles, width is no more than two centimetres, unit length power is little, generally below 60W/M, heat is not concentrated, heating area is little, and shape is single, need carry out special insulation processing to its other end bare electrode during use, heating element itself is not with and is connected and fixed part, uses deficiencies such as inconvenience, therefore is difficult to promote in civilian daily.

The purpose of this utility model is to provide a kind of integral insulation to coat, with the electric heating sheets of sheet high molecular PTC material as heater, it can make heat concentrate with bigger heating area, there is multiple shape to adapt to by the object of heating, and by self with fixed connecting piece be fixed on the heating object, be convenient for people to use.

The purpose of this utility model is achieved in that being multirow at two electrodes by the sheet high molecular PTC material surface of insulating heat-conduction material integral coating or its inside arranges.Whole like this sheet PTC heater just can evenly generate heat to its (TS) temperature, and electric heating sheets just can reach its (TR) temperature.

The utility model is owing to be laminated structure, and shape is various, and heating area is bigger, and heat is concentrated easy to use.

Concrete structure of the present utility model is provided by the following drawings and embodiment.

Fig. 1 is that the utility model electrode is the equidistant multi-circle spiral flow shape schematic diagram of arranging.

Fig. 2 is that the utility model electrode is equidistantly " E " font cross arrangement schematic diagram.

Fig. 3 is the profile that the utility model electrode is arranged respectively on the ptc material two sides.

Fig. 4 is the schematic diagram that the utility model has the single face heat-insulation layer.

The sheet ptc material that the utility model is used can be selected the high molecular PTC material of difference (TS) temperature as required for use.As with high pressure polyethylene, industrial carbon black and other additives through the mixing ptc material of making of thermoplastic, with the sheet material that extrusion molding, calendering, method such as crosslinked are made, its thickness generally is limited in the 1CM, is preferably 1-3mm.Its shape can be rectangle, garden shape, annular or other geometries.Institute's cloth electrode can be selected low resistive metal lead, bullion sheet etc. for use, by on the surface of PTC sheet material or it is inner, adopts that compression moulding, conducting resinl are bonding, heat melts method such as bonding and arrange.Its concrete structure is described as follows with reference to drawings and Examples;

Fig. 1. embodiment one: selecting (TS) temperature for use is that 85 ± 5 ℃ PTC sheet material is made heater (2), be of a size of that 1.5mm is thick, 6CM is wide, 1M is long, spacing with 5mm, be the multi-circle spiral flow shape copper cash that two diameters are 1mm of equidistantly arranging and make electrode (3), whole PTC heater (2) is done insulation by the high pressure polyethylene and is coated (4), power line (9) operating voltage 220V ± 20V, (TR) temperature of electric heating sheets (1) is 80 ± 5 ℃.

Fig. 2. embodiment two: selecting (TS) temperature for use is that 85 ± 5 ℃ PTC sheet material is made heater (2), it is thick to be of a size of 1.5mm, 6CM is wide, 1M is long, spacing with 5mm is " E " font and intersects, the two groups of wide copper sheets of the thick 1.7mm of 1.0mm of equidistantly arranging are made conductive electrode (3), whole PTC heater (2) does to coat (4) by polyvinyl chloride, power line (9) operating voltage 220V ± 20V, and (TR) temperature of electric heating sheets is 80 ± 5 ℃.

Fig. 3. in the foregoing description 1-2, when employing is arranged conductive electrode (3) on ptc material (2) surface, for safety, one of two conductive electrode (3) can be arranged in the back side of the surperficial same position of PTC sheet material (2).Take place because of the fixing not firm short circuit phenomenon that produces of electrode with regard to being difficult for like this.

Be to accelerate electric heating sheets (1) heat radiation and improve power, also can be between PTC heater (2) and insulation coating (4) filling insulated heat-conducting medium (6), as silicone oil etc.

Fig. 4. embodiment three: concentrate on the one side of electric heating sheets (1) more for making heat, can be laid with insulated thermal insulating layer (5) in ptc material heater (2) and the one side that insulation coats (4), can make heat pass through heat conduction hole (8) on the ptc material heater (2) like this, focus on the another side of electric heating sheets (1).

For ease of electric heating sheets (1) is fixed on the heating object, in insulation coating (4), be fixed with fixed connecting piece (7), as magnetic adsorption piece, band class connector etc.

Claims

1, a kind of electric heating sheets is coated to form by the positive temperature coefficient that is furnished with electrode (PTC) macromolecular material and insulation and it is characterized in that: arrange being multirow by two conductive electrode (3) on the sheet high molecular PTC material heater (2) of insulating material (4) integral coating.

2, electric heating sheets according to claim 1 is characterized in that: described conductive electrode (3) is multi-circle spiral flow shape and equidistantly arranges.

3, electric heating sheets according to claim 1 is characterized in that: described electrode is " E " font and intersects, and equidistantly arranges.

4, according to claim 1,2 or 3 described electric heating sheets, it is characterized in that: two conductive electrode (3) are arranged respectively on the top layer on ptc material heater (2) two sides.

5, electric heating sheets according to claim 1 is characterized in that: coat filling insulated heat-conducting medium (6) between (4) at ptc material heater (2) and insulation.

6, electric heating sheets according to claim 1 is characterized in that: be laid with insulated thermal insulating layer (5) in ptc material heater (2) and the one side that insulation coats (4).

7, electric heating sheets according to claim 1 is characterized in that: have some heat conduction holes (8) on ptc material heater (2).

8, electric heating sheets according to claim 1 is characterized in that: can coat on (4) in insulation and be fixed with plurality of fixed connector (7).