CN2217288Y - Variable power electric heater - Google Patents

Abstract

The utility model relates to an electric heater with variable power, which comprises a casing and a sealing cover, wherein, the inner of the casing is provided with a heat insulating skeleton with a cavity. The center of the skeleton is provided with an electrode leading wire hole. The cavity is orderly provided with a lower electrode plate, a PTC heating element and an upper electrode plate. Connector lugs of the upper electrode plate and the lower electrode plate are mutually staggered and are extended into the leading wire hole to be connected with power supply wires. The utility model has the characteristics of compact structure, safety, high heat efficiency, etc. The utility model is an ideal energy saving heater.

Description

The variable power electric heater

The utility model belongs to the electric type technical field, is a kind of variable power electric heater.

The conventional electric heating device mostly adopts resistance wire to directly act on container and heats, and as electric cup etc., owing to adopt the resistance wire heating, is easy to generate the excess temperature phenomenon, burns out apparatus; For firing equipments such as electric furnaces, because resistance wire is exposed at appearance, gets an electric shock easily and cause danger, and the outside to be unlimited semiclosed, it is bigger that electrical heat energy is scattered and disappeared, and wastes electric heating widely.

The utility model is at above-mentioned situation, adopts advanced technologic material---PTC heater element, makes heat energy all act on variable power electric heater on the heating container, heat efficiency height, adjustable power and provide a kind of by shell enclosure.

Variable power electric heater of the present utility model is realized in the following manner: it includes shell, capping, joint, the heat-resisting skeleton of insulation with die cavity is housed in the enclosure, skeleton central authorities have electrode lead hole, lower electrode plate, PTC heater element, electric pole plate are housed in the die cavity successively, the connector lug of upper and lower battery lead plate staggers mutually and puts in fairlead and power line joins, and is coated with high-temperature insulation paper and is lived by the capping tight enclosing at the skeleton upper surface; Electric pole plate is two, and two connector lugs are arranged respectively, so that regulate the power of heater.

The utility model is owing to adopt the PTC heater element, has characteristics such as safe and reliable, heat efficiency height; Battery lead plate and PTC heater element are equipped with in the skeleton die cavity, and compact conformation, heat energy are difficult for scattering and disappearing, and can economize on electricity reaches 30%, and long service life is a kind of desirable energy-saving heater.

Following being described with reference to the accompanying drawings:

Fig. 1 is a top view of the present utility model;

Fig. 2 is A-A cutaway view of Fig. 1;

Fig. 3 is the bottom view of electric pole plate;

Fig. 4 is B-B cutaway view of Fig. 2;

Fig. 5 is the top view of lower electrode plate;

Referring to Fig. 1,2, variable power electric heater of the present utility model, include shell 1, capping 2, the heat-resisting skeleton 4 of the insulation with die cavity 42 closely is housed in shell 1, can add one deck insulating paper between skeleton 4 and the shell 1, there is electrode lead hole 41 in the central authorities of skeleton 4, the outer casing bottom appropriate section also has the hole, can joint 3 be housed at place, shell bottom lead hole according to operating position, so that be connected with other apparatus, also can leg be housed, use separately at the shell bottom outer surface.Lower electrode plate 5, PTC heater element 6, electric pole plate 7 are housed in the die cavity 42 from the bottom up successively, and the connector lug of upper and lower battery lead plate 7,5 staggers mutually and puts in fairlead 41 and join with power line.Electric pole plate 7 surfaces after the assembling are consistent with the skeleton upper surface; Also can make electric pole plate 7 surfaces and the upper surface of skeleton 4 differ certain distance, on electric pole plate, cover one deck insulating paper 9 and heat-transfer metal guide plate 10 then, make it consistent, referring to Fig. 2 with the skeleton upper surface.Be coated with high-temperature insulation paper 8 backs at skeleton 4 upper surfaces and lived by metal cover 2 tight enclosings, electric pole plate is two 71,72, and two connector lugs are arranged respectively, so that regulate the power of heater according to practical situation.For easy to use, capping 2 preferably strikes out recessed inwards circular arc plate.

Referring to Fig. 4,5, described lower electrode plate 5 has 3-8 electrode plectanes 52 that evenly are connected on the electrode retaining collar 51 on the electrode retaining collar 51, and electrode connection head 53 is positioned on the electrode retaining collar 51.Referring to Fig. 1,3, electric pole plate 71 is the Circular Plate that a monoblock is not sealed, and electric pole plate 72 is the plectane consistent with bottom electrode plectane 52.The circular arc degree maximum of the annulus of electric pole plate 71 can not surpass all quantity with bottom electrode plectane 52 and subtract and the pairing circular arc degree of at least one number, and the global shape of upper and lower battery lead plate is correspondence mutually.According to above-mentioned said battery lead plate shape, the skeleton die cavity is the cavity that satisfies above-mentioned lower electrode plate shape, and the top of die cavity (with the electric pole plate corresponding position) should satisfy the shape of electric pole plate, so that upper and lower battery lead plate can closely be contained in the die cavity.Heater element 6 is clipped between two electrode plate, in order to guarantee its stability more, PTC heater element 6 is embedded between the upper and lower battery lead plate, the caulking groove 73 or 54 that indent is arranged on the battery lead plate, referring to accompanying drawing 2,4, the section of heater element 6 is more smaller than electroplax plectane like this, has space slightly around it, has guarantor's heat effect.

One backing plate 11 can be housed in the above-mentioned outer casing bottom.

Claims (6)

1, a kind of variable power electric heater, include shell 1, capping 2, it is characterized in that: the heat-resisting skeleton 4 of the insulation with die cavity is housed in the enclosure, there is electrode lead hole 41 in the central authorities of skeleton 4, the connector lug of lower electrode plate 5, PTC heater element 6, electric pole plate 7, upper and lower battery lead plate 7,5 is housed in the die cavity 42 successively, staggering mutually puts in fairlead 41 and joins with power line, is coated with high-temperature insulation paper 8 backs at the skeleton upper surface and is lived by capping 2 tight enclosings; Electric pole plate is two 71,72, and two connector lugs are arranged respectively, so that regulate the power of heater.

2, variable power electric heater according to claim 1, it is characterized in that: capping 2 strikes out recessed inwards arc plate.

3, variable power electric heater according to claim 1 is characterized in that: lower electrode plate 5 has 3-8 electrode plectanes 52 that evenly are connected on the electrode retaining collar 51 on the electrode retaining collar 51, and electrode connection head 53 is positioned on the electrode retaining collar 51; Electric pole plate 71 is the Circular Plate that a monoblock is not sealed, and electric pole plate 72 is the plectane consistent with bottom electrode plectane 52.

4, according to claim 1 or 3 described variable power electric heaters, it is characterized in that: the PTC heater element is embedded between the power-on and power-off pole plate.

5, variable power electric heater according to claim 1 is characterized in that: a backing plate 11 is housed in the bottom of shell.

6, variable power electric heater according to claim 1 is characterized in that: insulating paper is coated with insulating paper 9 utmost point heat transfer guide plates 10 for 8 times on electric pole plate.

Images