CN203206492U - Metal substrate heater - Google Patents

Abstract

The utility model relates to heating devices, and especially relates to a metal substrate heater in the heating devices. The utility model provides a metal substrate heater. The metal substrate heater comprises a metal substrate circuit board, and heating coils forming a loop. The metal substrate circuit board comprises a metal substrate, an insulating thermally-conductive film and a copper foil which are arranged in an up-and-down stacking manner, wherein the insulating thermally-conductive film is located between the metal substrate and the copper foil, the metal substrate and the copper foil are separated by the insulating thermally-conductive film in an insulating manner, and a fusible metal wire is serially connected between the heating coils. The metal substrate heater of the utility model has the following advantages: the constant temperature function can be realized through the metal substrate circuit board, and when an excessive temperature exists, the fusible metal wire is melted, so that the loop formed by the heating coils is disconnected so as to realize the over-temperature protection function.

Description

A kind of metal substrate heater

Technical field

The utility model relates to heater, relates in particular to a kind of metal substrate heater in the heater.

Background technology

In biochemical analysis, instrument and meter, realize the constant temperature function through regular meeting's application of heat device.Existing heater is to do pack into after insulation is isolated metal tube or can with the heating wire; it is bigger to take volume; can not be applied in narrow and small instrument space; and the overheat protector measure generally is the software and hardware circuit protection, but still has heter temperature continuation rising under software, the hardware fault situation and the risk of generation fire.

Another kind of existing heater; be to overlay heating wire at ceramic wafer; the heat that heating wire produces is delivered on the ceramic wafer; ceramic wafer heats other objects again; the overheat protector measure also is to use the software and hardware circuit protection; the risk that has initiation fire equally, and ceramic substrate is cracked easily, expensive.

Summary of the invention

In order to solve the problems of the prior art, the utility model provides a kind of metal substrate heater of realizing the constant temperature function and overheat protector being arranged.

The utility model provides a kind of metal substrate heater, the heating wire that comprises metal substrate wiring board and formation loop, described metal substrate wiring board comprises metal substrate, insulating heat-conductive film and the Copper Foil that stacked on top of one another arranges, described insulating heat-conductive film is between described metal substrate, Copper Foil, described metal substrate, Copper Foil are separated by described insulating heat-conductive film insulation, and described fusible metal silk is series between the described heating wire.

As further improvement of the utility model, described Copper Foil is provided with printed circuit.

As further improvement of the utility model, described insulating heat-conductive film is provided with the insulation resistance that insulation separates described metal substrate, Copper Foil, and the upper and lower surface of described insulating heat-conductive film contacts with described Copper Foil, metal substrate heat conduction respectively.

As further improvement of the utility model, described heating wire is arranged on the described Copper Foil.

As further improvement of the utility model, the two ends of described heating wire are connected with power line respectively.

As further improvement of the utility model, described power line is connected with power supply.

As further improvement of the utility model, the rectangular square wave of described heating wire is arranged.

As further improvement of the utility model, weld with described heating wire respectively at the two ends of described fusible metal silk.

The beneficial effects of the utility model are: by such scheme, can provide the constant temperature function by the metal substrate wiring board, and when temperature is too high, the fusing of fusible metal silk, and then disconnect the formed loop of heating wire, thus realize overheat protector.

Description of drawings

Fig. 1 is the cross-sectional view of the metal substrate wiring board of a kind of metal substrate heater of the utility model;

Fig. 2 is the structural representation of a kind of metal substrate heater of the utility model.

Embodiment

Below in conjunction with description of drawings and embodiment the utility model is further specified.

Drawing reference numeral among Fig. 1 to Fig. 2 is: metal substrate 101, insulating heat-conductive film 102; Copper Foil 103; Metal substrate wiring board 104; Heating wire 105; Fusible metal silk 106; Power supply silk 107.

Extremely shown in Figure 2 as Fig. 1, a kind of metal substrate heater, comprise that metal substrate wiring board 104(metal substrate wiring board 104 is called metal substrate PCB again) and form the heating wire 105 in loop, described heating wire 105 forms the loop with power supply, and described fusible metal silk 106 is series between the described heating wire 105.

As shown in Figure 1, described metal substrate wiring board 104 comprises metal substrate 101, insulating heat-conductive film 102 and the Copper Foil 103 that stacked on top of one another arranges, described insulating heat-conductive film 102 is between described metal substrate 101, Copper Foil 103, and described metal substrate 101, Copper Foil 103 are separated by described insulating heat-conductive film 102 insulation.

As shown in Figure 1, described Copper Foil 103 is provided with printed circuit.

As shown in Figure 1, described insulating heat-conductive film 102 is provided with the insulation resistance that insulation separates described metal substrate 101, Copper Foil 103, and the upper and lower surface of described insulating heat-conductive film 102 contacts with described Copper Foil 103, metal substrate 101 heat conduction respectively.

To shown in Figure 2, described heating wire 105 is arranged on the described Copper Foil 103 as Fig. 1.

To shown in Figure 2, the two ends of described heating wire 105 are connected with power line 107 respectively as Fig. 1.

To shown in Figure 2, described power line 107 is connected with power supply as Fig. 1.

To shown in Figure 2, described heating wire 105 rectangular square waves are arranged as Fig. 1.

To shown in Figure 2, weld with described heating wire 105 respectively at the two ends of described fusible metal silk 106 as Fig. 1.

A kind of metal substrate heater that the utility model provides can provide the constant temperature function by metal substrate wiring board 104, when temperature is too high; 106 fusing of fusible metal silk; and then disconnect heating wire 105 formed loops, cut off the electricity supply, thereby realize overheat protector.

A kind of metal substrate heater that the utility model provides has following advantage:

1, adopt metal substrate wiring board 104, because metal heat-conducting efficient is very high, so governing speed is fast, and substrate temperature field is uniform and stable especially;

2, metal substrate wiring board 104 mechanical strengths are high-leveled and difficult with breaking deformation;

3, metal substrate wiring board 104 belongs to the printed circuit board class, and convenient production in enormous quantities the in enormous quantities processes, mature production technology, simple, and cost is very cheap;

4, one section fusible metal silk 106 of welding between the heating wire 105; when metal substrate 101 continues heating; and temperature continues to rise to the fusing point of fusible metal silk 106; then fusible metal silk 106 can fuse; heating wire 105 loops are interrupted; stop the lasting rising of temperature, realized the protection to heating circuit.

The each several part Design and Features is as follows in a kind of metal substrate heater that the utility model provides.

1, heating wire 105;

(1) heating wire 105 effect: heating wire 105 have electric current by the time produce heat, heat is delivered to metal substrate 101, metal substrate 101 can heat heated object.

(2) arrangement of heating wire 105: heating wire 101 is evenly arranged, so that the heating of whole heater is more even, utilizes the heat conductivility of metal substrate 101 excellences, makes metal substrate 101 temperature error minimum everywhere; During heating wire 105 cablings adjacent heating wire 105 geometries try one's best identical and isometric, and current opposite in direction, the electromagnetic field that adjacent heating wire 105 produces is cancelled each other, and reduces electromagnetic radiation to greatest extent.

2, the fusible metal silk 106;

(1) principle selected of fusible metal silk 106 is that the burning-point that its fusing point is lower than circumferential component gets final product.One little section fusible metal silk 106 series welding is received between the heating wire 105, when metal substrate 101 temperature continue to rise to fusible metal silk 106 fusing points, these fusible metal silk 106 fusing; disconnect heating wire 105 loops, cut off the electricity supply, realize overheat protector; avoid producing fire, meet the standard of zero tolerance.

Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.

Claims (8)

1. metal substrate heater, it is characterized in that: the heating wire that comprises metal substrate wiring board and formation loop, described metal substrate wiring board comprises metal substrate, insulating heat-conductive film and the Copper Foil that stacked on top of one another arranges, described insulating heat-conductive film is between described metal substrate, Copper Foil, described metal substrate, Copper Foil are separated by described insulating heat-conductive film insulation, and described fusible metal silk is series between the described heating wire.

2. metal substrate heater according to claim 1, it is characterized in that: described Copper Foil is provided with printed circuit.

3. metal substrate heater according to claim 1, it is characterized in that: described insulating heat-conductive film is provided with the insulation resistance that insulation separates described metal substrate, Copper Foil, and the upper and lower surface of described insulating heat-conductive film contacts with described Copper Foil, metal substrate heat conduction respectively.

4. metal substrate heater according to claim 1, it is characterized in that: described heating wire is arranged on the described Copper Foil.

5. metal substrate heater according to claim 1, it is characterized in that: the two ends of described heating wire are connected with power line respectively.

6. metal substrate heater according to claim 5, it is characterized in that: described power line is connected with power supply.

7. metal substrate heater according to claim 1 is characterized in that: the rectangular square wave layout of described heating wire.

8. metal substrate heater according to claim 1 is characterized in that: the two ends of described fusible metal silk respectively with described heating wire welding.

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