CN2377792Y

CN2377792Y - Thermoelectric sheet

Info

Publication number: CN2377792Y
Application number: CN 99226705
Authority: CN
Inventors: 陈树链
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-21
Filing date: 1999-05-21
Publication date: 2000-05-10
Anticipated expiration: 2009-05-21

Abstract

The utility model discloses a thermoelectric sheet, which mainly comprises an insulating sheet body and a conductive sheet. The utility model is characterized in that the width degree on each section of the conductive sheet is different, and preset area range controls the raise of temperature, to satisfy the specific requirements of various applications for raising temperature. The utility model effectively overcomes the defects that when the thermoelectric sheet is applied to demist the surface of car glass, because of temperature difference phenomenon, the car glass is easy to generate cracking, when applied to the occasion of mould, etc., which need to enhance temperature averagely, the qualities of mould finished products are different, the utility model has high industrial utility value.

Description

Electric heating piece

The utility model is relevant with resistance-type heating sheet, specifically, refers to a kind of variation of leaning on electric current by the path especially, and the resistance value difference when electric current is passed through further reaches the electric heating piece of controlling the degree of heat that zones of different produces.

See also Fig. 1, the electric heating piece of present visible a kind of sheet type, it is to unroll in the insulating trip surface to arrange the continous way circuit, this circuit is to be made by the metal material of the suitable resistance value of tool, when these circuit two ends are communicated with power supply by lead, when making electric current flow through this circuit formation path, utilize the resistance of this circuit, make electric current by the time produce heat energy, the common application of these electric heating pieces is installed in vehicle glass, characteristic by the heating of energising back is evaporated the aqueous vapor that is attached to glass surface, avoids aqueous vapor to form vaporific obstruction pilot's line of vision attached to the vehicle glass surface, and this kind application implementation generally is commonly referred to as the demist hot line; Certainly, the common electric heating piece of this kind also is widely used in other various occasions and equipment.For example: the heating of mould or heat, with thermal source as heating.

Because the width homogeneous in this each section of circuit path on these electric heating piece surfaces, cause the heat energy of this each section of circuit generation suitable, can't be preestablished according to the needed heating-up temperature of practical application, and, when electric current passes through this circuit, this each section of circuit is all owing to the resistance effect is generated heat, heat energy and to this circuit neighboring area with radiation, modes such as conduction are transmitted, for this electric heating piece, its middle section produces the heat energy except this circuit of being located at this zone, more accepted to transmit and next heat energy around the zone thus, and this electric heating piece neighboring area is except the heat energy that this circuit of being located at this zone produces, the influence of the heat energy that transmitted by regional thus one-sided limit and come, cause this electric heating piece middle section faster than the intensification of neighboring area, the temperature difference phenomenon that formation temperature differs, if this electric heating piece is affixed on vehicle glass when being applied to demist, because the temperature difference of this electric heating piece easily makes this vehicle glass produce crack performance, or for the vehicle glass that posts sheathing paper and Yan Shiyou because the too high situation that causes the sheathing paper burning that heats up, and if when being applied to mould etc. and needing the average occasion that heats up, the aforementioned electric backing is owing to be difficult to control the heating rate of each several part, easily cause mould each several part temperature inconsistent, cause the quality of molded product to differ; In addition, see also Fig. 2, Fig. 3, it is to show other two kinds of electric heating pieces commonly used, though its application scenario is with shown in Figure 1 different, yet the path width of its each section resistance circuit is all identical, and is difficult to control the each several part temperature to adapt to the needs of various heat temperature raising conditions.

Main purpose of the present utility model is to provide a kind of electric heating piece, and it utilizes the sectional area that changes conducting strip, when electric current is passed through, utilizes the difference of different cross-sectional current flux, and the height that control heat energy produces is for the intensification of control specific region.

The technical solution of the utility model is, a kind of electric heating piece, mainly comprise an insulation lamellar body and a conducting strip, wherein, this conducting strip is the continuity metal lamellar body of the suitable resistance value of tool, this conducting strip unrolls and arranges in this insulation lamellar body, and these conducting strip two ends are respectively terminals, imports electric current formation path so as to being communicated with power supply; Its characteristics are: the width degree difference of this each section of conducting strip, heat up with the control of predeterminable area scope.

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

Fig. 1 is the schematic diagram of electric heating piece commonly used;

Fig. 2 is the schematic diagram of another electric heating piece commonly used;

Fig. 3 is the schematic diagram of another electric heating piece commonly used;

Fig. 4 is the vertical view of the utility model preferred embodiment one;

Fig. 5 is the vertical view of the utility model preferred embodiment two;

Fig. 6 is the vertical view of the utility model preferred embodiment three;

Fig. 7 is the vertical view of the utility model preferred embodiment four.

See also Fig. 4, electric heating piece preferred embodiment one of the present utility model, mainly comprise an insulation lamellar body 10 and a conducting strip 20, wherein, these insulation lamellar body 10 surfaces outwards are central area 12 from middle body in regular turn, middle battery limit (BL) 14, frontier district 16, should be located on this central area 12 peripheries in middle battery limit (BL) 14, this frontier district 16 is located on this central area 14 peripheries, and its periphery is abutting this insulation lamellar body 10 peripheries, this conducting strip 20 is the continuity lamellar bodies with suitable length and thickness homogeneous, it is to make with the metal with suitable resistance value, this conducting strip 20 is attached at this insulation lamellar body 10, and unroll and be distributed in this central area 12, battery limit (BL) 14 and this frontier district 16 in being somebody's turn to do, these conducting strip 20 two ends are respectively terminals 21, import electric current formation path to be communicated with power supply, this conducting strip 20 is arranged in the width of the width of these central area 12 scopes greater than these battery limit (BL) 14 scopes, this conducting strip 20 is arranged in the width of the width of these battery limit (BL) 14 scopes greater than these frontier district 16 scopes, when making electric current pass through this conducting strip 20 in view of the above, these insulation lamellar body 10 each zones are heated up consistent.

According to the above the utility model preferred embodiment one, it utilizes the sectional area that changes this conducting strip 20, when electric current is passed through, because sectional area difference, the current flux difference of these conducting strip 20 each sections, make the heat of each section generation of different in width have different, with regard to preferred embodiment one, the heat energy that this conducting strip 20 in this central area 12 is produced is lower, the battery limit (BL) 14 interior heat energy that produce are than these central area 12 height in being somebody's turn to do, and battery limit (BL) 14 height during heat energy of these frontier district 16 interior generations are somebody's turn to do are added hot conduction, radiation effect, make this insulation lamellar body 10 surfaces intensification homogeneous everywhere, to reach the purpose that heats up in the control specific region; Preferred embodiment one is because the intensification of may command specific region, when being applied to the surperficial demist of vehicle glass, because its intensification homogeneous of may command makes the phenomenon that the unlikely generation temperature of vehicle glass differs, to avoid glass to produce be full of cracks, and be applied to the occasion that mould is heated or is incubated, can keep the mold temperature unanimity, and have suitable industrial value.See also Fig. 5, it is the utility model preferred embodiment two, wherein, arrange in the conducting strip 20 of insulation lamellar body 10 and can rely on equally by the variation of controlling width, and produce the intensification height of this insulation lamellar body 10 of control in the specific region, to satisfy various different application occasions for the specific demand that heats up.

See also Fig. 6, Fig. 7, it is the utility model preferred embodiment three, four, it can satisfy the demand of controlling the different intensifications of presumptive area equally with aforementioned preferred embodiment, and both difference of preferred embodiment three, four is that preferred embodiment three is to be communicated with power supply with series system, and the preferred embodiment four fundamental rules are to be communicated with power supply with parallel way.

Claims

1, a kind of electric heating piece mainly comprises an insulation lamellar body and a conducting strip, wherein, this conducting strip is the continuity metal lamellar body of the suitable resistance value of tool, this conducting strip unrolls and arranges in this insulation lamellar body, and these conducting strip two ends are respectively terminals, imports electric current formation path so as to being communicated with power supply; It is characterized in that: the width degree difference of this each section of conducting strip.

2, by the described a kind of electric heating piece of claim 1, it is characterized in that: this insulating trip surface outwards is central area, middle battery limit (BL), frontier district in regular turn from middle body, should be located on this central area periphery in middle battery limit (BL), this frontier district is located on this central area periphery, this conducting strip is arranged in the width of the width of this central area scope greater than this battery limit (BL) scope, and this conducting strip is arranged in the width of the width of battery limit (BL) scope greater than this frontier district scope.

3, by the described a kind of electric heating piece of claim 1, it is characterized in that: this insulating trip surface outwards is central area, middle battery limit (BL), frontier district in regular turn from middle body, should be located on this central area periphery in middle battery limit (BL), this frontier district is located on this central area periphery, this conducting strip is arranged in the width of the width of this frontier district scope greater than this battery limit (BL) scope, and this conducting strip is arranged in the width of the width of this battery limit (BL) scope greater than this central area scope.