CN201160018Y

CN201160018Y - Internal-string type thermal resistor

Info

Publication number: CN201160018Y
Application number: CNU2008200284179U
Authority: CN
Inventors: 李可为; 赵仙玲
Original assignee: Xi An Xiwuer Electronic & Information Group Co Ltd
Current assignee: Xi An Xiwuer Electronic & Information Group Co Ltd
Priority date: 2008-02-29
Filing date: 2008-02-29
Publication date: 2008-12-03
Anticipated expiration: 2018-02-28

Abstract

The utility model relates to an internal string type thermal resistor, which is composed of two or more thermal resistor chips which are tightly contacted and connected. The simple internal string type structure of the thermal resistor resolves the problem that the voltage withstanding performance of single-chip thermal resistor is weak. The experiment indicates that the voltage withstanding performance of the internal string type thermal resistor is 1.7 times that of the single-chip thermal resistor. If the internal string type thermal resistor is used for the filament preheating of the integrated energy saving lamp or the electronic ballast, the service life and the quality of the whole lamp can be enhanced greatly, and the internal string type thermal resistor also has the advantages that the structure is simple, the manufacture is easy, and the cost is low.

Description

The inner series thermistor

Technical field

The utility model relates to a kind of thermistor, relates in particular to two or more chip inner series thermistors, and it is mainly used in the filament pre-heating of integrated energy-saving lamp or electric ballast.

Background technology

In prior art, the filament pre-heating resistance of integrated energy-saving lamp or electric ballast etc. is general, and what adopt is a positive temperature coefficient time lagged type thermistor (being called for short PTCR), it be one with the temperature resistance Sensitive Apparatus that its resistance value suddenly increases that raises.During use, it is attempted by in the soft starting circuit of integrated energy-saving lamp, electric ballast, when just turning on light, its resistance value is normal, can form shunting with the resonant circuit of electric ballast, make not starting of oscillation of detuning of resonant circuit, thereby make electric current flow through filament and to its preheating, subsequently, the electric current of pre-thermal resistance of flowing through makes the resistive element heating, and then the resistance of pre-thermal resistance suddenly rises, and blocks its diverter branch, make the resonant circuit starting of oscillation of electric ballast, thereby form the high-frequency and high-voltage of inversion and light fluorescent tube in lamp tube ends.In the thermistor use, when particularly being applied to the T5 electron rectifier, finding that the problem of breakdown inefficacy appears in its regular meeting, thereby influenced the useful life of whole lamp.Because the T5 electron rectifier is to thermistor requirement of withstand voltage height, the withstand voltage properties of monolithic thermistor is difficult to satisfy instructions for use.But, in market and existing document, do not see the good measure that addresses this problem at present.

The utility model content

The purpose of this utility model is at the problem in the prior art, and a kind of inner series thermistor of good pressure-resistant performance is provided, to improve the useful life and the quality of whole lamp.

For achieving the above object, the technical solution of the utility model is as follows:

It is closely contacted by two or more thermistor chips and connects and composes.

The further improved technical scheme of the utility model is as follows:

The thermistor chip that described two or more tight contact connects is a positive temperature coefficient time-delay thermistor, and has identical switch temperature, is provided with leading foot at the two ends of two or more thermistor chip series connection.

The thermistor chip that described a plurality of tight contact connects is positive temperature coefficient time-delay thermistor, wherein by a series connection group of forming by the identical thermistor chip of two or more switch temperatures, also has a series connection group of forming by the different thermistor chip of one or more switch temperatures, and be provided with three or many leading foots, wherein two pins are drawn from the two ends of the thermistor chip series connection group of same switch temperature, and another or many pins are drawn from the series connection terminal point and the series connection intermediate point of the temperature-sensitive electrical chip series connection group of different switch temperatures.

Described tight contact connects and composes two or more thermistor chips outside and is provided with insulating barrier, this insulating barrier for seal, shell dress or cover seal structure.

By technique scheme as can be seen, the utility model carries out internal series-connection with two or more thermistor chips, in order to improve its withstand voltage properties.Experiment shows that the withstand voltage properties of this inner series thermistor is 1.7 times of the one chip thermistor, thereby has improved the life-span and the quality of whole lamp greatly.The utility model has solved the problem of withstand voltage of one chip thermistor with simple inner series structure, and have simple in structure, be easy to make, the characteristics that cost is low have market prospects preferably.

Description of drawings

The structural representation of string in Fig. 1, two chips of the present utility model.

The circuit theory diagrams of Fig. 2, Fig. 1.

The structural representation of string in Fig. 3, three chips of the present utility model.

The circuit theory diagrams of Fig. 4, Fig. 3.

The circuit theory diagrams of string in Fig. 5, a plurality of chip.

Embodiment

Referring to Fig. 1,2, this routine thermistor is made of thermistor chip 1 and thermistor chip 2 tight contact and connection, and wherein closely contact connects and can adopt welding, bonding mode.If this thermistor is used for filament pre-heating, then the switch temperature of chip 1 or chip 2 is selected for use identical, the all-in resistance rate that its resistivity addition separately equals this device gets final product, and its volume size is unrestricted, and leading foot A, B can draw from two end points of two chip series connection.By that analogy, this thermistor can also be made of the tight contact and connection of a plurality of chips, with its withstand voltage properties of further increase.This kind structure both had been applicable to semistor (PTCR), also was applicable to negative tempperature coefficient thermistor (being called for short NTCR).

Referring to Fig. 3; this routine thermistor is the thermistor chip 3 of having connected again on the basis of last example; needs according to the user; sometimes in household electrical appliance, also need a thermistor to carry out overcurrent protection; so at the last example thermistor chip 3 of on the basis, can connecting again; leading foot can be A, B, C, and wherein the thermal-sensitive electric resistance device between A, the

B

1,2 can be used for filament pre-heating, and the thermal-sensitive electric resistance device 3 between B, the C can be used for overcurrent protection.Referring to Fig. 5; by that analogy; a plurality of if desired overcurrent protection thermistors; a plurality of thermistors 4 of then can connecting; 5 ... wherein by thermistor chip 1; 2 form the thermistor series connection group that switch temperature is identical; and by thermistor 3; 4; 5 form the thermistor series connection group that switch temperature is different; and can from the different thermistor series connection group of switch temperature, draw a plurality of leading foots; as can be from series connection terminal point C and a plurality of thermistor 3; 4; series connection point D in the middle of 5; E draws, and makes thermistor 3; 4; 5 can be respectively applied for different overcurrent protections.

Can not adopt external packing at above-mentioned inner series thermistor, make the non-packed type, but for the better protection device, preferably wrap up a layer insulating in its outside, can adopt seal, shell dress or sleeve structure, wherein encapsulating structure is to adopt materials such as epoxy resin, organosilicon or phenolic aldehyde that device is sealed; The shell assembling structure is device to be packed in the inflaming retarding shell into capping or embedding then; The cover seal structure is to seal the device cover with heat-shrinkable T bush or other insulative.

Claims

1, a kind of inner series thermistor is characterized in that: it is closely contacted by two or more thermistor chips (1,2 or 1,2,3,4,5) and connects and composes.

2, inner series thermistor according to claim 1, it is characterized in that: the thermistor chip (1,2) that described two or more tight contacts connect is positive temperature coefficient time-delay thermistor, and have identical switch temperature, be provided with leading foot (A, B) at the two ends of two or more thermistor chips (1,2) series connection.

3, inner series thermistor according to claim 1, it is characterized in that: the thermistor chip that described a plurality of tight contacts connect is positive temperature coefficient time-delay thermistor, wherein there is one by the identical thermistor chip (1 of two or more switch temperatures, 2) the series connection group of Zu Chenging, also has one by the different thermistor chip (3 of one or more switch temperatures, 4,5) the series connection group of Zu Chenging, and be provided with three or many leading foots, wherein two pins are from the two ends (A of the thermistor chip series connection group of same switch temperature, B) draw, another or many pins are from the series connection terminal point (C) of the temperature-sensitive electrical chip series connection group of different switch temperatures and the intermediate point (D that connects, E) draw.

4, according to claim 1,2 or 3 described inner series thermistors, it is characterized in that: described tight contact connects and composes two or more thermistor chips outside and is provided with a layer insulating, and this insulating barrier adopts and seals, shell is adorned or sleeve structure.