CN207835839U - Multi-layer series PTC resistor heat generating core - Google Patents

Abstract

The utility model is related to a kind of Multi-layer series PTC resistor heat generating core, body construction includes：A plurality of PTC resistor component, a metal heat-conducting outer tube, several PTC resistor pieces, a plastic cement posting and external insulation layer；PTC resistor component includes：One plate electrode piece, a U-shaped electrode slice, several PTC resistor pieces, a plastic cement posting and a piece of inner insulating layer.The utility model is conducive to PTC resistor and efficiently plays its performance, is particularly advantageous for occasion of the PTC resistor for higher pressure.

Description

Multi-layer series PTC resistor heat generating core

Technical field

The utility model is related to a kind of Multi-layer series PTC resistor heat generating cores efficiently playing its performance conducive to PTC resistor.

Background technology

PTC thermistor heater has been widely used in gas, liquid etc..It is mostly several pieces even numbers in such applications Ten PTC resistors are arranged in parallel, to meet the requirement of different capacity.Each PTC resistor passes through the parallel connection of two electrode slices wherein Connection, that is to say, that every PTC resistor all bears identical voltage, the i.e. rated voltage of heater.The respective work of each PTC resistor Make, voltage is identical and electric current is possibly different from.This mode avoid be connected in series with because of each PTC resistor performance difference and The difference of environment, heating rate, which differs, causes voltage distribution uneven.The voltage that the faster PTC pieces of heating are born is higher, voltage Higher heating is faster, until the PTC resistor piece for bearing high voltage punctures because of overheat, and bears the PTC resistor piece of low-voltage It hardly generates heat because of brownout.Therefore, all uses of PTC resistor piece are connected in parallel in existing such PTC resistor heater.With That PTC resistor heater application is more and more wider, and the requirement to it is higher and higher, especially PTC resistor heater is in new-energy automobile In application.It is more and more high with the voltage of electric car power supply, it is desirable that the voltage of PTC resistor heater is also higher and higher. PTC resistor piece will bear that voltage is higher, and the thickness of PTC resistor piece is bigger (thicker) (along the strong direction of electricity).PTC resistor piece be with Barium titanate is the semiconductive ceramic of base.This material heat conduction itself is poor, the heat of the bigger PTC resistor piece inner heat of thickness It is more difficult to pass to its surface, then passed on the object heated by electrode slice and shell, PTC resistor piece internal temperature liter at this time Height, resistance become larger, and electric current reduces, and whole heater power is just smaller.PTC resistor thicker simultaneously is to the quick of surrounding environment change Perception is weaker, self distinctive temperature control performance also weakens.It can be seen that thicker PTC resistor piece is more unfavorable for it as hair The application of thermal element.

Utility model content

The purpose of this utility model is to provide a kind of using relatively thin PTC resistor piece, so that PTC resistor efficiently plays The Multi-layer series PTC resistor heat generating core of its performance.

The utility model is a kind of such, Multi-layer series PTC resistor heat generating core, and body construction includes：It is a plurality of PTC resistor component, a metal heat-conducting outer tube, several PTC resistor pieces, a plastic cement posting and external insulation layer.

PTC resistor component includes：One plate electrode piece, a U-shaped electrode slice, several PTC resistor pieces, a plastic cement Posting and a piece of inner insulating layer.Plate electrode piece one end is equipped with a connecting terminal, and plastic cement posting is equipped with several holes PTC position With electrode slice positioning groove, plate electrode piece is placed in positioning in the groove of posting, is provided in the holes PTC position in the above PTC resistor piece, PTC resistor plate electrode face are bonded closely with plate electrode piece；U is installed in the groove of plastic cement posting another side The side face of type electrode slice, and its another side face is placed in the surface of plate electrode piece around posting edge, and at them Between a piece of interior insulation piece is set, to ensure to be electrically insulated between plate electrode piece and U-shaped electrode slice.

PTC resistor piece is put in the holes the PTC position of the posting of middle layer, and respectively setting one is described above in its both sides PTC resistor component, and one side face down of the U-shaped electrode slice in component is made to enter in the groove of interfix frame, makes its U-shaped electrode The face of piece and the electrode surface of PTC resistor piece fit closely, and three layers of PTC resistor piece therein in this way forms similar sandwich knot Structure, then in this one external insulation layer of structural member outer layer covers, overall structure is filled in metal heat-conducting outer tube.It is parallel on outer tube two sides Pressurization, so that outer tube is slightly distorted, above-mentioned component be tightly clamped, each face in them is made to fit closely, ensure PTC resistor piece and Conductive and heat conduction is all good between electrode slice.

Upper, middle and lower-ranking PTC resistor is electrically being connected in series in above-mentioned body construction.Electric current when energization Enter from upper panel electrode slice, the PTC resistor piece through upper layer, the U-shaped electrode slice in upper layer, middle level PTC resistor piece, the U-shaped electricity of lower layer Then pole piece, lower layer's PTC resistor piece are flowed out from lower layer's plate electrode piece.

The designed U-shaped electrode slice in above-mentioned body construction makes the heat for the middle section that PTC resistor piece sent out It is more quickly transmitted to outer tube, and makes each layer PTC resistor piece thermal behavior of upper, middle and lower than more consistent.

U-shaped electrode slice in above-mentioned body construction is also designed to flat-tube type electrode slice, and effect is essentially identical.

The utility model is conducive to PTC resistor and efficiently plays its performance, is particularly advantageous for field of the PTC resistor for higher pressure It closes.

Description of the drawings

Fig. 1 is the broken away view of PTC components in the utility model.

Fig. 2 is the sectional view of PTC components in the utility model.

Fig. 3 is the body construction broken away view of the utility model.

Fig. 4 is the body construction sectional view of the utility model.

Fig. 5 is that U-shaped electrode slice is changed to the body construction sectional view after flat-tube type electrode slice in the utility model.

Fig. 6 is that the utility model applies the structural schematic diagram in air heater.

Symbol description

PTC components -- 1 metal heat-conducting outer tube -- 2 PTC resistor piece -- 3

Plastic cement posting -- 4 external insulation layers -- 5 plate electrode piece -- 6

U-shaped or flat-tube type electrode slice -- 7 inner insulating layer -- 8

Specific implementation mode

Shown in Fig. 1, the PTC components in the utility model include：One plate electrode piece (6), a U Type electrode slice (7), several PTC resistor pieces (3), a plastic cement posting (4) and a piece of inner insulating layer (8).Plate electrode piece (6) One end is equipped with a connecting terminal, to be connect with external power.Plastic cement posting (4) is equipped with hole position and the electrode of several PTC pieces Plate electrode piece (6) is placed in positioning in the groove of posting by piece positioning groove, is put into PTC in the holes PTC position in the above Resistor disc (3) makes PTC resistor plate electrode face be bonded closely with plate electrode piece (6).In the recessed of plastic cement posting (4) another side The side face of the U-shaped electrode slice (7) of installation in slot, and its another side face is placed in plate electrode piece (6) around posting edge Surface, and a piece of interior insulation piece (8) is placed between them, to ensure between plate electrode piece (6) and U-shaped electrode slice (7) It is electrical isolation.The relativeness of each part please refers to Fig. 2.

Shown in Fig. 3, the utility model ontology includes：A plurality of above-mentioned PTC components (1), a metal heat-conducting Outer tube (2), several PTC resistor pieces (3), a plastic cement posting (4) and external insulation layer (5).In the posting (4) of middle layer PTC resistor piece (3) is put in the position of the holes PTC, and respectively places an above-mentioned PTC component (1) in its both sides, and makes the U in component Type electrode slice (7) down enters in the groove of interfix frame (4), makes the electrode in the face and PTC resistor piece (3) of its U-shaped electrode slice (7) Face fits closely.Three layers of PTC resistor piece therein so just forms similar sandwich structure.Again in this component outer layer covers one Layer insulating materials (5), then will integrally fill in metal heat-conducting outer tube (2).In the parallel pressurization in outer tube (2) two sides, make outer tube two Side is slightly distorted, and above-mentioned component is tightly clamped, and each face in them is made to fit closely, and ensures PTC resistor piece (3) and electrode slice Conductive and heat conduction is all good between (6,7).The relativeness of each component please refers to Fig. 4.

Designed U-shaped electrode slice is also designed to flat-tube type electrode slice in above-mentioned ontology, and embodiments thereof is essentially identical. Also flat type pipe electrode piece can be first compressed after the PTC components in implementing the utility model, so that component is more completely combined, after being more convenient for The implementation of continuous ontology.The relativeness of its each component please refers to Fig. 5.

The heat generating member of the utility model can be widely applied to various heating uses, the especially higher occasion of voltage, such as at it Both sides add cooling fin (refering to Fig. 6), you can make air heater, be widely used in automobile-used, household warm air equipment.

Claims (3)

1. a kind of Multi-layer series PTC resistor heat generating core, it is characterised in that：

Its body construction includes：A plurality of PTC resistor component, a metal heat-conducting outer tube, several PTC resistor pieces, a plastic cement Posting and external insulation layer；

PTC resistor component includes：One plate electrode piece, a U-shaped electrode slice, several PTC resistor pieces, a plastic cement positioning Frame and a piece of inner insulating layer；Plate electrode piece one end is equipped with a connecting terminal, and plastic cement posting is equipped with several holes PTC position and electricity Pole piece positioning groove, plate electrode piece are placed in positioning in the groove of posting, and PTC electricity is provided in the holes PTC position in the above Piece is hindered, PTC resistor plate electrode face is bonded closely with plate electrode piece；U-shaped electricity is installed in the groove of plastic cement posting another side The side face of pole piece, and its another side face is placed in the surface of plate electrode piece around posting edge, and between them A piece of interior insulation piece is set, is electrically insulated between plate electrode piece and U-shaped electrode slice；

In the holes the PTC position of the posting of middle layer put PTC resistor piece, and respectively setting one is described above in its both sides PTC resistor component, and one side face down of the U-shaped electrode slice in component is made to enter in the groove of interfix frame, make its U-shaped electrode slice Face and the electrode surface of PTC resistor piece fit closely, three layers of PTC resistor piece therein in this way forms similar sandwich structure, Again in this one external insulation layer of structural member outer layer covers, overall structure is filled in metal heat-conducting outer tube.

2. Multi-layer series PTC resistor heat generating core according to claim 1, it is characterized in that upper, middle and lower three in body construction Layer PTC resistor is electrically being connected in series with.

3. Multi-layer series PTC resistor heat generating core according to claim 1, it is characterized in that U-shaped electrode slice is also designed to Flat-tube type electrode slice.