CN102620854A

CN102620854A - Temperature sensor

Info

Publication number: CN102620854A
Application number: CN2012100713724A
Authority: CN
Inventors: 陈建平
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-19
Filing date: 2012-03-19
Publication date: 2012-08-01

Abstract

The invention discloses a temperature sensor, particularly a temperature sensor with a sintering type thermistor for a temperature sensitive element. The temperature sensor comprises a metal shell for encapsulating the sintering type thermistor or a metal vessel or a pipeline for placing a medium, the sintering type thermistor and two metal leads, wherein one side of the sintering type thermistor is directly welded on the inner side of the metal shell for encapsulating the sintering type thermistor or the outer side of the metal vessel or the pipeline for placing the medium, and the other end of the sintering type thermistor is welded with one metal lead; and any side of the metal shell for encapsulating the sintering type thermistor or the outer side of the metal vessel or the pipeline for placing the medium is welded with the other metal lead. The temperature sensor has low cost and high reliability, is easy to process, can quickly induce the constantly changed actual temperature of the medium to be detected and can be widely applied to occasions with requirements on higher control accuracy or higher reaction speed.

Description

A kind of temperature sensor

Technical field

The present invention relates to a kind of temperature sensor, particularly temperature-sensing element (device) adopts the temperature sensor of slug type thermistor.

Background technology

Temperature sensor is widely used in industry and civilian various needs carry out temperature survey and temperature controlled occasion; The sensitive element of common temperature sensor has thermopair, RTD, copper resistance, slug type thermistor, semiconductor PN etc., wherein the slug type thermistor have that cost is low, the high outstanding advantage of sensitivity and being widely used.Slug type thermistor both sides all have good weldability; Each face down bonding connects a metal lead wire; Two direct cut-in temperature testing circuits of metal lead wire; The slug type thermistor temperature sensor of two metal lead wires of welding generally has two kinds of packing forms, and the one, with the metal shell encapsulation, the one, use resin-encapsulated.The slug type thermistor temperature sensor general container of medium to be detected or tapping of pipeline of inserting when using with the metal shell encapsulation; At least across metal shell and insulation-encapsulated material, and the insulation-encapsulated material all belongs to the material of heat conductivility difference between slug type thermistor and the medium to be detected; The slug type thermistor temperature sensor of resin-encapsulated generally directly places medium to be detected when using; In air; Across the resin-encapsulated layer, the resin of encapsulation usefulness also belongs to the material of heat conductivility difference between same slug type thermistor and the medium to be detected; And when the temperature that needs to detect canister or pipeline internal medium; But inconvenient perforate on canister or the pipeline; And when the slug type thermistor temperature sensor can not directly place medium to be detected; Then can only the slug type thermistor temperature sensor be close to the outside surface of canister or pipeline; All exist in using the slug type thermistor can not sense the shortcoming of the actual temperature that medium to be detected constantly changes rapidly at above these, cause having relatively high expectations or reaction velocity requires faster occasion can not use this type temperature sensor in some control accuracies.

Summary of the invention

The technical matters that the present invention will solve is the deficiency that overcomes prior art, provides a kind of and can sense the constantly slug type thermistor temperature sensor of the actual temperature of variation of medium to be detected rapidly.

In order to solve above technical matters, the technical scheme that the present invention adopted is:

It comprises the metal shell of slug type thermistor, packaging sintering type thermistor, two metal lead wires a kind of temperature sensor; Slug type thermistor one side directly is welded on inside of metal outershell; A metal lead wire is welded on the opposite side of slug type thermistor and stretches out metal shell; Another root metal lead wire is welded on inside of metal outershell and stretches out metal shell or directly be welded on the metal shell outside, and the metal shell opening part has the resene material to fill.

It comprises slug type thermistor, canister or pipeline, two metal lead wires a kind of temperature sensor; Slug type thermistor one side directly is welded on the canister or the pipeline outside; A metal lead wire is welded on the opposite side of slug type thermistor; Another root metal lead wire is welded on the canister or the pipeline outside, and slug type thermistor, two metal lead wire welding ends have the resene material to cover.

Adopt the beneficial effect of technique scheme to be: temperature sensor can be sensed the actual temperature that medium to be detected constantly changes rapidly; And processing is simple, cost is low, reliability is high, can be widely used in that some control accuracies are had relatively high expectations or reaction velocity requires occasion faster.

Description of drawings

Fig. 1 is the sectional view of first embodiment of temperature sensor.

Fig. 2 is the sectional view of second embodiment of temperature sensor.

Embodiment

Below in conjunction with accompanying drawing the present invention is described in further detail.

Fig. 1 is the sectional view of first embodiment of temperature sensor; Metal shell 1 is used for packaging sintering type thermistor 2; The medial surface of metal shell 1 has good weldability, and two sides of slug type thermistor 2 all have good weldability, and the medial surface bottom of metal shell 1 welds together through scolder 5 with a side of slug type thermistor 2; Scolder 5 is the scolder of stanniferous normally; It has good heat-conducting, when metal shell 1 with can be promptly after medium to be detected contacts the actual temperature of medium to be detected be passed to slug type thermistor 2, another side of slug type thermistor 2 is welded with a metal lead wire 3; The medial surface of metal shell 1 is welded with another root metal lead wire 4;

Metal lead wire

3,4 cut-in temperature testing circuits can detect the actual temperature of medium through temperature sensing circuit, and metal shell 1 opening part has resene material 6 to fill; Can be in metal shell 1 with the partial closure of slug type thermistor 2 and

metal lead wire

3,4, can prevent that

metal lead wire

3,4 short circuits and steam from getting into to cause temperature sensor fails.

Fig. 2 is the sectional view of second embodiment of temperature sensor; Hold inconvenient perforate on canister or the pipeline 7 of medium to be detected; But canister or pipeline 7 lateral surfaces have good weldability; A side of canister or pipeline 7 lateral surfaces and slug type thermistor 2 welds together through the scolder 5 with good heat conductive performance, and another side of slug type thermistor 2 is welded with a metal lead wire 3, and canister or pipeline 7 lateral surfaces are welded with another root metal lead wire 4; The welding end of slug type thermistor 2,

metal lead wire

3,4 has resene material 6 to cover; Be used to protect the welding end of slug type thermistor 2 and

metal lead wire

3,4, make full use of the good heat-conducting of canister or pipeline 7 and scolder 5, promptly the actual temperature with medium to be detected passes to slug type thermistor 2.

Equally, the heater of metal shell is arranged, as long as have good weldability like the lateral surface of electric heating tube, just can be the same as its lateral surface welding slug type thermistor formation temperature sensor with second embodiment.

Among second embodiment of temperature sensor; Holding on canister or the pipeline of medium to be detected need be when a plurality of regional detected temperatures; Can weld a plurality of slug type thermistors at canister or pipeline lateral surface; And at another side weld metal lead-in wire of slug type thermistor, canister or pipeline lateral surface only need weld the common port of a metal lead wire as the slug type thermistor.Equally; The metal shell of a plurality of temperature sensors also can be through being connected with the canister or the reliable of pipeline of fixing metal shell among first embodiment of temperature sensor; Form the common port of slug type thermistor, thereby reduce the metal lead wire of each temperature sensor.

Claims

1. temperature sensor; It is characterized in that: it comprises the metal shell of slug type thermistor, packaging sintering type thermistor, two metal lead wires; Slug type thermistor one side directly is welded on inside of metal outershell; A metal lead wire is welded on the opposite side of slug type thermistor and stretches out metal shell, and another root metal lead wire is welded on inside of metal outershell and stretches out metal shell or directly be welded on the metal shell outside, and the metal shell opening part has the resene material to fill.

2. temperature sensor; It is characterized in that: it comprises slug type thermistor, canister or pipeline, two metal lead wires; Slug type thermistor one side directly is welded on the canister or the pipeline outside; A metal lead wire is welded on the opposite side of slug type thermistor, and another root metal lead wire is welded on the canister or the pipeline outside, and slug type thermistor, two metal lead wire welding ends have the resene material to cover.