CN2331142Y

CN2331142Y - High-temperature PTC energy-saving safe long-life exothermic plate

Info

Publication number: CN2331142Y
Application number: CN 98228248
Authority: CN
Inventors: 惠恒荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-02-09
Filing date: 1998-02-09
Publication date: 1999-07-28
Anticipated expiration: 2008-02-09

Abstract

The utility model relates to a high temperature PTC energy saving safe long-life exothermic plate, which belongs to the field of electric heaters. The aim of the utility model is to solve the defects of the existing similar products which have large power consumption, unsafety, short service life and inconvenient use, the existing similar products can not work in wet states or inflammable and explosive environments, and the existing similar products have to provide a forced blowing radiating device, etc. The utility model is characterized in that an exothermic element adopts a semiconductor material with particular parameters, particularly a PTC semiconducting ceramic exothermic sheet; an exothermic body is insulated and sealed, and heat efficiency can be achieved by an inner heat conductive electrode and an outer radiating sheet; the surface temperature of the exothermic plate is designed in the range of room temperature to 250 DEG C; the static exothermic power of the exothermic plate is designed in the range of 100W-20KW /m [2]. The utility model has high electrothermal conversion efficiency, energy saving, safety, long service life, convenience and capability of using in the wet states or the inflammable and explosive environments, and does not need continuously working for a long time under the forced blowing radiating static conditions.

Description

The long-lived heating board of high-temp PTC energy-saving safety

A kind of electric conversion efficiency height, energy-conservation, safety, longevity, convenience, high-temp PTC heating board that can static continuous operation under damp attitude environment.

The utility model is a kind of PTC semiconductor heating board, form by heat generating components, heat conduction electrode, insulating barrier, shell and fin, have electric conversion efficiency height, energy-conservation, safety, long specially, convenient, can be in the characteristics of not having continuous operation under the static conditions of forcing the blowing heat radiation in the damp attitude environment.Belong to the electric heater field, be applicable to industry, agricultural, scientific research and civilian heating constant-temperature system and heating installation.

Existing electric heater, the overwhelming majority all is heater element with the resistance wire, its shortcoming is that electric conversion efficiency is low, power consumption is high, oxidation and fracture easily, life-span are not long, resistance wire temperature overheating overtemperature, cause security incident easily, in damp attitude or inflammable and explosive environment, have more danger, and heater surface temperature height, cause the operational environment temperature difference big, influence effect.The a small amount of PTC heater that has occurred have electric conversion efficiency height, life-span long, than the advantage of resistance wire heating element safety, but, only have general fail safe owing to adopt the structure of insulation sealing, in the environment of damp attitude, can not use; Again owing to must adopt and force the oblongleaf kadsura stem or root thermic devices just can make its safe operate as normal, when lacking pressure oblongleaf kadsura stem or root thermic devices or blowing device and breaking down, then can not work or burnt out the generation security incident.To sum up, be still the resistance wire heating element and account for absolute leading position in each field of national economy, and PTC heater before this is because of its defective, its range of application is severely limited.

The utility model is at above-mentioned defective, utilization PTC semiconductor exothermic material, PTC semiconductive ceramic element particularly, design safe and reliable insulated enclosure formula structure, be developed into electric conversion efficiency height, energy-conservation, safety, longevity, convenience, can be in damp attitude or inflammable and explosive environment, need not force to dry under the static conditions of heat radiation the long-lived heating board of the high-temp PTC energy-saving safety of long time continuous working.Be that heat generating components is that example is illustrated with the PTC semiconductive ceramic below.

High-temp PTC heating board of the present utility model is made up of heat generating components, heat conduction electrode, insulating barrier, shell and fin.Its heat generating components is selected high-temp PTC semiconductive ceramic sheet for use; The heat conduction electrode is selected the high metallic plate of conductive coefficient for use, PTC semiconductive ceramic sheet is bonded in up and down between the heat conduction battery lead plate by solid pressure or high temperature adhesive, two interelectrode spaces isolate with the damp proof insulation material, and heat generating components and heat conduction electrode constitute core component of the present utility model; The insulating barrier that constitutes with the damp proof insulation material around the core component surrounds; Shell selects for use thermal conductivity good, and the sheet metal of moisture-proof anticorrosive erosion is made, and shell is tightly fastening with endosome, forms the heating board matrix; The heating board matrix surface can affixed perfect heat-dissipating fin.Total fastens as one with mechanical means, and reaches good airproof performance, insulating properties is strong, thermal diffusivity is good requirement.The length size of heating board is all unrestricted, and its heating power size and surface temperature also can by how many adjustings of the high-temp PTC semiconductive ceramic sheet of packing into.

High-temp PTC heating board of the present utility model, main design parameters is: PTC sheet Curie point is greater than 280 ℃, and is withstand voltage greater than 450V, and the surface temperature scope of design of heating board matrix is a room temperature to 250 ℃, and its static heating power scope of design is 100W-20KW/m ², less than 0.01mA, other electric property reaches national technical standard to casing insulation resistance greater than 500M Ω, leakage current.Because PTC automatic current limiting constant temperature, the highest substrate temperature is below 350 ℃, so the sorrow of the flames of anger or the accident of igniting.The average life span of PTC semiconductive ceramic sheet was not less than 5000 hours, and this is that any resistance wire heating element can't be compared.Owing to adopted insulation system, not only energy operate as normal under damp attitude, and not water funk or other object contact; The special structure of its inside and the specific of PTC potsherd selected for use, can guarantee is not having static continuous operation under the blowing of the pressure condition; Surface temperature is not high because its surface area is big again, makes the working temperature good uniformity.

High-temp PTC heating board of the present utility model, application is very extensive, and all is that heating or thermostat below about 250 ℃ is all applicable in working temperature.All kinds of baking ovens, drying tunnel and the heat-processing equipment that can be used for fields such as industrial production, scientific experiment, Medical Devices; The bakery that can be used for baking vanish, plastic-blasting, plating, cigarette, tea, silk cocoon, furniture production process and various raw material such as grain, timber and product; Can be used for agricultural, aquaculture, bioengineering and various greenhouse system, can be used for civilian heating installation such as air conditioner, warming machine, warm desktop, warm foot-operated, hand warmer etc.; Can be used for small household appliances and hot furniture production, as electric iron, disinfection cabinet, dryer, warm bed, dim sofa etc.

As mentioned above, goal of the invention of the present utility model all realizes.

High-temp PTC heating board structure of the present utility model is shown in Figure of description.

Among the figure, 1 is fin; 2 is shell; 3 is insulating barrier; 4 are the heat conduction electrode; 5 is PTC semiconductive ceramic sheet; 6 is the electrode gap absciss layer; 7 is electrode outlet line; 8 are the insulation periphery.

Now make embodiment with high-temp PTC heating board as Figure of description.It is the compression moulding of 0.3-0.5mm aluminium sheet that fin is selected thickness for use, it is the aluminium sheet of 1mm or the corrosion resistant plate of 0.8mm that sheathing material is selected thickness for use, it is the micarex of 1mm that insulating barrier is selected thickness for use, it is the mica strip of 3mm that the insulation periphery is selected thickness for use, it is micarex or the aluminosilicate fiber cotton of 0.5mm that separator is selected thickness for use, it is the aluminium sheet of 1mm that the heat conduction battery lead plate is selected thickness for use, and electrode outlet line selects for use heatproof greater than 250 ℃ high temperature wire, puts into the PTC semiconductive ceramic sheet of special parameter between two battery lead plates.To be in place and fasten as one as upper-part, to the special requirement water test or put into also available high-temperature seal adhesive of product or the welding that water works and seal its surface perimeter slit, so far promptly finish high-temp PTC heating board of the present utility model with mechanical means.

Claims

The long-lived heating board of high-temp PTC energy-saving safety, it is characterized in that heater adopts the semiconductor heater element, PTC semiconductive ceramic element particularly, its structure adopts the insulated enclosure formula, heat conduction electrode and shell, fin all select for use the high thermal conductivity metallic plate to make, surround with moistureproof filling insulating material between electrode and around the whole heat generating components, the physical dimension of heating board is unrestricted, and its unit are heating power is adjustable.