CN2109519U - Fin type large power ceramic heater - Google Patents

Abstract

The utility model discloses a fin type large power heater using the positive temperature coefficient thermistor (PTC) ceramic as the heating element. The heat radiator of the utility model is in an aluminum fin type. The utility model mainly comprises a PTC ceramic sheet, a fin type heat radiator shaped with brazing, 99.99% pure aluminum foil filling material, a thick aluminum plate outside the heat radiator and coating high temperature insulation silicon rubber. The design in the structure of the utility model makes use of the body thermal characteristic of the PTC ceramic thoroughly and effectively and enhances the tight degree of the contact between the heat radiator and the PTC ceramic sheet. The utility model has advantages of high efficiency and reliability, which can be used in the various hot air apparatus.

Description

Fin type large power ceramic heater

The utility model relates to a kind ofly makes heater with semistor (PTC) pottery, and radiator is the high-power heater of aluminium fin shape.

Along with the discovery of semistor (PTC) pottery, carried out the heater research that utilizes its characteristic both at home and abroad, and be developed into various heater.Units such as China South China Science ﹠ Engineering University disclose the high-power heater of a kind of pecten shape in patent No. 90218265.X patent, it adopts a small amount of high-quality PTC element, configuration connects into the thin pecten shape fin of high density, large tracts of land of copolar or polarity, and the filler of high thermal coupling, high-insulativity is housed between fin and insulating support, is nipped into small-sized high-power heater with intense thermal loads ability.It is a kind of easy to manufacture, technology is simple, the life-span is high, cost is low heater.MAT has studied PTC high-output power heater configuration and operation principle in great detail on National Technical Repost Vol.31No.3Jun.1985, and is designed and manufactured into " corrugated " high-output power storage heater.This storage heater is shaped thin aluminum sheet earlier and is corrugated fin, presss from both sides aluminium sheet in two sides of corrugated fin then, and soldering becomes the corrugated radiator in nitrogen.Then,, be solidificated on the PTC potsherd the corrugated radiator is bonding, make the corrugated storage heater at the both sides of PTC pottery coating silicon series sticker.This storage heater heating efficiency height, easy to use, be a kind of ceramic heater preferably.Yet also there is deficiency in these heaters, and design not to the utmost fully rationally.In order to overcome the deficiency on the existing ceramic heater structural design, the utility model improves and provides a kind of PTC of giving full play to ceramic body thermal characteristics, and radiator contacts the good high-power ceramic heater of fin shape with the PTC potsherd.

The purpose of this utility model is in order to prevent the heat radiation of PTC ceramic body hot material surface temperature too fast and fin shape radiator and potsherd loose contact, between between fin shape radiator and the potsherd, set up one deck 99.99% pure aluminum foil filler, and respectively add the thick aluminium sheet of a slice in the fin shape radiator of potsherd two sides outside, with screws clamp, thereby make simple relatively, the reliable high-power ceramic heater of thermal efficiency height, structure.

The utility model heater is by the formations such as high-temperature insulation silicon rubber of thick aluminium sheet, screw and the coated of the radiator outside of 99.99% pure aluminum foil filler between fin shape radiator, PTC potsherd electrode surface and the radiator of semistor (PTC) potsherd, lead welding and shaping, PTC potsherd two sides.As everyone knows, the heating power of PTC pottery storage heater is expressed from the next:

P＝α（Tc－Ta）

Wherein, P is the heater heating power; α is the heating factor; Tc is the Curie temperature of PTC pottery; Ta is the heater environment temperature.By formula as can be known, the heating power that increases heater can improve Tc and α.Yet, Tc is relevant with PTC ceramic body hot material, certain PTC ceramic body hot material has definite Curie temperature, it is certain PTC pottery, after temperature is raised to curie point Tc, the resistance of semistor (PTC) is anxious to be increased, thereby cut-out electric current, stop heating, so available its made control heater, secondly, the heating factor-alpha is relevant with effective design of radiator, the material that promptly depends on fin, the thickness of fin, size, shape, spacing, the heat spreader structures that fin is formed and the way of contact of radiator and PTC potsherd, contact tightness degree or the like.After having studied above-mentioned factor, the utility model is at PTC ceramic body thermal characteristics, by increasing thick alclad improving the skin temperature of PTC body heat pottery, thereby given full play to the performance of PTC pottery, improved the reliability of heater; Simultaneously, the utility model also is further to improve the heating factor, radiator is improved with the tightness degree that pottery contacts, between radiator and PTC ceramic component, increased one deck 99.99% pure aluminum foil filler, and radiator and ceramic component are clamped with screw and thick aluminium sheet, improve radiator and the tightness degree that pottery directly contacts, improved the heat radiation factor-alpha, increased heating power.By improving and effectively design, no matter the utility model heater is heating power, or reliability all improves greatly, is a kind of heating efficiency height, practicality, PTC ceramic heater reliably.

Advantage of the present utility model is apparent in view.Brazing fin shape fansink designs is reasonable, the heating efficiency height; With 99.99% pure aluminum foil is that filler has improved radiator and ceramic tightness degree and the reliability that directly contacts; The thick alclad of setting up has not only improved the skin temperature of PTC ceramic body hot material, and has improved the heater reliability, has simplified technology.Therefore, be relatively reasonably high-efficiency high-power ceramic heater of a kind of design.

Description of drawings:

Fig. 1 (A, B) is the structural map of the utility model heater.Wherein: the 1st, the power supply copper tip; The 2nd, rivet; The 3rd, the power outlet terminal; The 4th, the aluminium alloy radiating fin; The 5th, thick alclad above the radiator; The 6th, thick alclad below the radiator; 7 is 99.99% pure aluminum foil fillers; The 8th, bowl-shape bead; The 9th, spring washer; The 10th, trip bolt; The 11st, semistor (PTC) potsherd; The 12nd, high-temperature insulation silicon rubber.

Describe the embodiment that meets the utility model theme in detail below in conjunction with accompanying drawing.

Embodiment

The utility model heater mainly is made of radiator, semistor 11,99.99% pure aluminum foil filler 7 and thick alclad 5,6.Wherein, radiator is made radiating fin 4 with aluminium sheet, and the aluminium sheet soldering is bonding on the folder makes.The electrode surface of the aluminium fin shape radiator of making is clean with alcohol wash, and riveted joint extraction electrode terminal 3 is put the pure aluminum foil 7 that cleaning is crossed, and the PTC potsherd 11 that again electrode surface was cleaned is placed on the pure aluminum foil 7, the alignment screw hole.Then, equally cleaning aluminium foil 7 is placed on another electrode surface of PTC potsherd 11 again, another aluminium fin shape radiator electrode face subsides of riveting extraction electrode terminal 3 in advance are placed on the aluminium foil 7, thick alclad 5 on radiator two covers, fastening with screw 10.The heater that is tightened to around high-temperature insulation silicon rubber coating PTC potsherd 11, and is put into curing oven and is handled, and just makes the high-power ceramic heater of the utility model aluminium fin shape.The heater of making can be assembled hot air generators such as being applied to storage heater, clothesdrier, air-conditioner, hair dryer, drying box after electric performance test is qualified.

Claims (3)

1, a kind of semistor (PTC) ceramic heater comprises aluminium fin shape radiator, PTC ceramic component and coated high-temperature insulation silicon rubber that soldering is made, it is characterized in that being connected on the radiator thick aluminium sheet.

2, aluminium fin shape ceramic heater according to claim 1 is characterized in that thick aluminium sheet is by the screw clamping heater that spins.

3,, it is characterized in that filling pure aluminum foil contact filler between radiator that thick aluminium sheet clamps and the PTC potsherd according to claim 1,2 described aluminium fin shape ceramic heaters.

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