CN208984237U - Temperature sensor - Google Patents

Abstract

Disclose a kind of temperature sensor, comprising: NTC thermistor, two parallel wires being bonded respectively with the NTC thermistor both ends, two parallel wires are isolated by the first insulating materials；Second insulation material layer at least covers the NTC thermistor and first insulating materials.

Description

Temperature sensor

Technical field

The present invention relates to a kind of temperature sensor, especially a kind of high temperature or low temperature deep water temperature sensor.

Background technique

Existing NTC (Negative Temperature Coefficient) temperature sensor is obtained by following process : electric wire is cut into required length first, after peeling, NTC thermistor chip in welding, then to being welded with NTC thermistor The electric wire head of chip carries out epoxy resin encapsulation.Some are inserted into various shells and carry out epoxy resin encapsulation once again.This is with regard to band Carry out a problem, since the plastic cement of epoxy resin and electric wire is not same substance, two kinds of substance intermiscibilities exist always is asked Topic.So for most of NTC temperature sensors in wet environment, some months that has more than is needed will be because of NTC temperature sensor on the market It is immersed by water and causes to fail.

Summary of the invention

In view of one or more problems in the prior art, a kind of temperature sensor is proposed.

In one aspect of the invention, it proposes, a kind of temperature sensor, comprising: NTC thermistor；Respectively with it is described Two parallel wires of NTC thermistor both ends bonding, two parallel wires are isolated by the first insulating materials；Second absolutely Edge material layer at least covers the NTC thermistor and first insulating materials.

According to some embodiments of the present invention, the first insulating materials includes glue, plastic cement, fiber, pcb board, rubber, electricity At least one of wood, film, second insulation material layer include polyvinyl chloride, crosslinked PVC, crosslinking PE, polyethylene, polyethers At least one of ester, polyurethane, thermoplastic colloidality elastomer, polypropylene, propylene oxide, silica gel, rubber or polytetrafluoroethylene (PTFE).

According to some embodiments of the present invention, the NTC thermistor includes single-ended glass seal thermistor, diode-type heat Quick resistance, bare die type thermistor or patch-type thermistor.

According to some embodiments of the present invention, the thickness of the second insulation material layer are as follows: 0.1mm~4mm.

According to some embodiments of the present invention, there is plating metal in the second insulating layer that the NTC thermistor is covered Layer, or it is cased with metal tube, or be stained with metal sticker.

In another aspect of this invention, a kind of temperature sensor is proposed, comprising: the first NTC thermistor；2nd NTC Thermistor；First conducting wire, the second conducting wire and privates parallel to each other, wherein one end of first NTC thermistor It is bonded to the first conducting wire, the other end of first NTC thermistor and one end of the second NTC thermistor are bonded to together Two conducting wires, the other end of second NTC thermistor are bonded to privates, first conducting wire, the second conducting wire and third Conducting wire is isolated by the first insulating materials；Second insulation material layer at least covers first NTC thermistor, the 2nd NTC heat Quick resistance and first insulating materials.

According to some embodiments of the present invention, first insulating materials include glue, plastic cement, fiber, pcb board, rubber, At least one of bakelite, film, second insulation material layer include polyvinyl chloride, crosslinked PVC, crosslinking PE, polyethylene, gather At least one of ether-ether, polyurethane, thermoplastic colloidality elastomer, polypropylene, propylene oxide, silica gel, rubber or polytetrafluoroethylene (PTFE).

According to some embodiments of the present invention, either one or two of first NTC thermistor and the 2nd NTC thermistor Including single-ended glass seal thermistor, diode type thermistor, bare die type thermistor or patch-type thermistor.

According to some embodiments of the present invention, the thickness of the second insulation material layer are as follows: 0.1mm~4mm.

According to some embodiments of the present invention, first NTC thermistor and the 2nd NTC thermistor are covered There is electroplated metal layer in second insulating layer, or be cased with metal tube, or is stained with metal sticker.

The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention, And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.

Detailed description of the invention

It for a better understanding of the present invention, will the present invention will be described in detail according to the following drawings:

Figure 1A and Figure 1B is according to an embodiment of the present invention to be shown using NTC diode glass envelope type thermistor, single branch line It is intended to；

Fig. 2A and Fig. 2 B is according to an embodiment of the present invention using NTC bare die type thermistor, the schematic diagram of parallel lines；

Fig. 3 A and Fig. 3 B are that according to an embodiment of the present invention printed using NTC bare die type, conducting wire is sprayed on showing on pcb board It is intended to；

Fig. 4 A and Fig. 4 B are according to an embodiment of the present invention using NTC single-ended glass seal type thermistor, insulating materials isolation The schematic diagram of parallel wire；

Fig. 5 A and Fig. 5 B are according to an embodiment of the present invention using NTC diode glass envelope type thermistor, NTC bare die type heat Quick resistance, two double doublings, two groups of deep water temperature sensor schematic diagrames；

Fig. 6 A and Fig. 6 B are according to an embodiment of the present invention using NTC single-ended glass seal type thermistor, NTC diode glass envelope Two groups of deep water temperature sensor schematic diagrames that type thermistor, a double doublings and a single branch line are formed.

Specific embodiment

Specific embodiments of the present invention are described more fully below, it should be noted that the embodiments described herein is served only for illustrating Illustrate, is not intended to restrict the invention.In the following description, in order to provide a thorough understanding of the present invention, a large amount of spies are elaborated Determine details.It will be apparent, however, to one skilled in the art that: this hair need not be carried out using these specific details It is bright.In other instances, in order to avoid obscuring the present invention, well known structure, material or method are not specifically described.

Throughout the specification, meaning is referred to " one embodiment ", " embodiment ", " example " or " example " : a particular feature, structure, or characteristic described in conjunction with this embodiment or example is comprised at least one embodiment of the invention. Therefore, the phrase " in one embodiment ", " in embodiment ", " example " occurred in each place of the whole instruction Or " example " is not necessarily all referring to the same embodiment or example.Furthermore, it is possible in any suitable combination and/or sub-portfolio will be specific Feature, structure or characteristic combine in one or more embodiment or examples.In addition, those of ordinary skill in the art should manage Solution, term "and/or" used herein includes any and all combinations for the project that one or more correlations are listed.

What NTC temperature sensor can be obtained by following process: electric wire is cut into required length first, after peeling, weldering NTC thermistor chip is connected, epoxy resin encapsulation then is carried out to the electric wire head for being welded with NTC thermistor chip.Some It is inserted into various shells and carries out epoxy resin encapsulation once again.But above-mentioned process bands carry out a problem, due to epoxy resin and electricity The plastic cement of line is not same substance, and two kinds of substance intermiscibilities have problem always.So most of NTC temperature pass on the market In wet environment, some months that has more than is needed will cause to fail sensor because NTC temperature sensor is immersed by water；And in the market The method of common solution be exactly extension housing length perhaps between shell and conducting wire add the heat-shrinkable T bush pyrocondensation with glue or It selects and mixes preferable epoxide-resin glue with PVC material, it is expected that the time for immersing water extends, passed to extend NTC temperature The service life of sensor.(NTC thermistor connects conducting wire and is NTC temperature sensor by voltage-withstand test and performance test)

The present inventor once tested, and two parallel conducting wires is allowed to burn-on NTC thermistor, after cutting respectively into Enter injection molding machine injection molding.As a result, it has been found that: due to pressure powerful in injection molding machine, two parallel conducting wires can not be infused at all in injection molding machine Remain unchanged keeping parallelism after modeling, therefore in view of the above-mentioned problems, present invention aims to solve the deficiencies of the prior art, and provides a kind of a kind of complete New method.

According to an embodiment of the invention, a kind of high temperature deep water type NTC temperature sensor, including several be at least welded with it is single The parallel lines of NTC thermistor, certain length gradually enter injection molding machine through guide frame and are molded once again, with same thawing Rear PVC (Poly Vinyl Chioride polyvinyl chloride), XLPVC (crosslinked PVC), XLPE (crosslinking PE), PE (polyethylene), PU (polyether ester, polyurethane), TPE (thermoplastic colloidality elastomer), PP (polypropylene), PO (propylene oxide), silica gel, rubber and/or In polytetrafluoroethylene (PTFE) any plastic cement be connected to NTC thermistor and with this certain length parallel lines it is fully wrapped around live, It is connect by after traction, peeling, the later process operation such as beat terminal, jack base with external circuit by the way that water is cooling.

A kind of low temperature deep water type NTC temperature sensor is provided in other embodiments, including several are at least welded (bonding) There are the parallel lines of single NTC thermistor, certain length, gradually enters injection molding machine through guide frame and be molded once again, use is same PVC (Poly Vinyl Chioride polyvinyl chloride), XLPVC (crosslinked PVC), PVC (Poly Vinyl after thawing Chioride polyvinyl chloride), any plastic cement is connected certain length to NTC thermistor and with this in XLPVC (crosslinked PVC) Parallel lines it is fully wrapped around live, by water it is cooling by after traction, peeling, the later process operation such as beat terminal, jack base and External circuit connection.

In other embodiments, providing a kind of priority scheme is the thickness of the plastic cement according to needing waterproofing grade to be achieved It is determined to determine the plastic cement most thin thickness being molded on deep water type NTC temperature sensor once again and plastic material characteristic；Generally For, waterproofing grade is higher, and plastic cement thickness is thicker.The deep water type NTC temperature sensor refers to the NTC to the complete sealing of water Temperature sensor.

There is provided the conducting wire that a kind of priority scheme is the parallel lines in other embodiments is conductive metal solid or through changing Metal contact wires after learning corrosion, and pass through metal contact wires after printing or spraying plating.

It is between two parallel wires with insulation that provide a kind of priority scheme in other embodiments, which be the parallel lines, Material separates, or has two single open traverses to keep parallel always after insulating materials is isolated.Its insulating materials include glue, The materials such as plastic cement, fiber, pcb board, rubber, bakelite, film.

It is single-ended glass seal thermistor, two that provide a kind of priority scheme in other embodiments, which be the NTC thermistor, Pole pipe type thermistor, bare die type thermistor or patch-type thermistor.

There is provided a kind of priority scheme in other embodiments is that the deep water type NTC temperature sensor is containing NTC temperature-sensitive There is electroplated metal layer in resistance injection surface position, or is cased with metal tube, or be stained with metal sticker.

It is with same plastic cement through thermosol injection molding, cooling due to being covered in the present invention on NTC thermistor and parallel lines After formed, be not present two kinds of substances.And plastic cement waterproof performance currently on the market is very excellent, as long as therefore controlling and infusing again The plastic cement thickness of modeling, can directly control the waterproofing grade of NTC temperature sensor.Very tight temperature is required to pass waterproofing grade Sensor, the present invention are known as deep water type temperature sensor.

High temperature deep water type temperature sensor and low temperature deep water type temperature sensor are the completely new new productions of NTC temperature sensor Product will generate many completely new purposes for its purposes.That is not only it covers common NTC temperature currently on the market The basic purposes of sensor is spent, and many unexpected breakthroughs can be brought.

Currently used for manufacturing the plastic cement of common wiring, waterproofing grade itself has been very terrible, of the invention invention People did following experiments: in experiment to boil water, the time to boil water generally surpasses only the NTC temperature sensor encapsulated with epoxy resin 300 hours, insulation resistance was just already less than 1,000,000；And with 26#PVC electric wire, in its experiment to boil water, the time to boil water is more than 1000 hours, insulation resistance was still greater than 100,000,000.Therefore such as we also need the higher temperature sensor of waterproofing grade, only The parallel lines for being welded with single NTC thermistor, certain length need to be entered injection molding machine through guide frame to be molded once again, make to cover Plastic cement most thin thickness on deep water temperature sensor thickeies, so that it may easily meet the requirements.

In the present invention, it can be welded by high temperature resistant, Laser Welding, while glass envelope NTC thermistor chip can pass through 300 DEG C of high temperature, and electric wire has the PVC electric wire and high temperature resistant Teflon line, silica gel line of normal low temperature, therefore not only obtains waterproof The high normal low temperature deep water temperature sensor of grade, the also high high temperature deep water temperature sensor of available waterproofing grade.And This two NTC temperature sensors are the blank of entire industry.

It is known, for example, that since high temperature Teflon line is insoluble with other materials, so either epoxy resin or glue Water does not glue higher temperature line always, but according to the scheme of this patent, we can obtain waterproof truly easily The high high temperature deep water temperature sensor of grade.Its heatproof can reach 200 DEG C or more.

It keeps parallel always due to there is insulating materials to support conducting wire between parallel lines, NTC temperature-sensitive electricity is welded with when several The parallel lines of resistance enter injection molding machine through guide frame and are molded once again, although pressure powerful in injection mold still makes in parallel lines Conducting wire keeping parallelism, covered again with plastic rubber material that is stylish, melting NTC thermistor and with this connected parallel lines Lid is cooled down by traction, peeling by water, beats terminal, connect after the later process operation such as jack base with external circuit.Here Emphasis is: entering injection molding machine to be molded once again through guide frame is the very plurality of parallel lines for being only welded with a NTC thermistor, also There is insulating materials to support conducting wire between parallel lines and keep parallel always, is molded once again in this way, entering injection molding machine through guide frame Out be continuous, one whole, but by water it is cooling by traction, peeling, play terminal, the later process operation such as jack base Afterwards, multiple deep water temperature sensors are just born.

Figure 1A and Figure 1B is according to an embodiment of the present invention to be shown using NTC diode glass envelope type thermistor, single branch line It is intended to.As shown in FIG. 1A and 1B, NTC diode glass envelope type thermistor 11 is (flat in two single branch lines 12 with laser welding Capable the first conducting wire and the second conducting wire and be isolated by insulating materials plastic cement or rubber) on, form solder joint 13.Two single branch lines 12 be in parastate, is introduced into the injection mold of injection molding machine by manipulator or guide rail and is molded again, just forms deep water temperature and passes Sensor.Single branch line tail portion in parallel lines 12 after being molded again, by peeling, or beats terminal hole seat and connect with external circuit. The plastic cement being molded again in Figure 1B is expressed as 14, it can be high temperature resistant plastic cement.Material is thus formed high temperature deep water temperature sensing The height of device, waterproofing grade determines that waterproofing grade is got over according to the most thin thickness for being completely covered on deep water temperature sensor plastic cement Height, plastic cement thickness are thicker.

Fig. 2A and Fig. 2 B is according to an embodiment of the present invention using NTC bare die type thermistor, the schematic diagram of parallel lines.Such as Shown in Fig. 2A and Fig. 2 B, by NTC bare die type thermistor 21, with double doublings 22 are soldered to, (parallel the first conducting wire and second is led Line and be isolated by insulating materials plastic cement or rubber) on, be introduced into the injection mold of injection molding machine again by manipulator or guide rail Secondary injection molding forms deep water temperature sensor.The plastic cement 24 being molded again is shown in Fig. 2 B, this example uses NTC bare die type heat Quick resistance 21, has used soldering technology, so the plastic cement 24 being molded again cannot be plastic cement resistant to high temperature, it can only be room temperature modeling Glue or low temperature plastic cement.

Fig. 3 A and Fig. 3 B are that according to an embodiment of the present invention printed using NTC bare die type, conducting wire is sprayed on showing on pcb board It is intended to.As shown in Figure 3A and Figure 3B, (parallel the first conducting wire and the second conducting wire and by insulation material of the copper wire 35 on pcb board 36 The isolation of material pcb board material) it is to be presented on pcb board 36 by printing, NTC bare die type thermistor 31 is used into ultrasonic bonding On conducting wire 35, solder joint 33 is formed, is introduced into the injection mold of injection molding machine by manipulator or guide rail and is molded again, just formed deep Water temperature sensor.Fig. 3 B shows the plastic cement 34 being molded again.

Fig. 4 A and Fig. 4 B are according to an embodiment of the present invention using NTC single-ended glass seal type thermistor, insulating materials isolation The schematic diagram of parallel wire.As shown in Figure 4 A and 4 B shown in FIG., two parallel wires 45 are separated with insulating materials glue 47, and NTC is mono- It holds glass envelope type thermistor 41 on conductor 45, to form solder joint 43 with ultrasonic bonding, injection molding is introduced by manipulator or guide rail It is molded again in the injection mold of machine, just forms deep water temperature sensor, Fig. 4 B shows the plastic cement 44 being molded again.

Fig. 5 A and Fig. 5 B are according to an embodiment of the present invention using NTC diode glass envelope type thermistor, NTC bare die type heat Quick resistance, two double doublings, two groups of deep water temperature sensor schematic diagrames.As shown in Figure 5 A and 5B, by NTC diode glass envelope type heat Quick resistance 51 on two single branch lines 52, forms solder joint 53, the conducting wire in two single branch lines 52 is in parastate with laser welding (parallel the first conducting wire and the second conducting wire and be isolated by insulating materials plastic cement or rubber).By NTC bare die type thermistor 56 are introduced into the injection mold of injection molding machine again with being soldered on parallel lines 55, by this two groups of semi-finished product by manipulator or guide rail Injection molding, is formed two groups of deep water temperature sensors, and single branch line 52 of tail portion, parallel lines 55 pass through stripping after being molded again Skin, or beat terminal hole seat and connect with external cable.

Fig. 5 B shows the plastic cement 54 being molded again.Because this example uses NTC bare die type thermistor 56, and uses Welding technique, so the plastic cement 54 being molded again cannot be plastic cement resistant to high temperature, it can only be room temperature plastic cement or low temperature plastic cement.

Fig. 6 A and Fig. 6 B are according to an embodiment of the present invention using NTC single-ended glass seal type thermistor, NTC diode glass envelope Type thermistor, double doubling (parallel the first conducting wire and the second conducting wire and be isolated by insulating materials plastic cement or rubber) The two groups of deep water temperature sensor schematic diagrames formed with a single branch line (privates).As shown in Figure 6 A and 6B, by NTC bis- One pin electricity consumption of pole pipe glass envelope type thermistor 61 is welded on a single branch line 62, and another pin electricity consumption is welded on On one parallel lines 65,66 electricity consumption of NTC single-ended glass seal type thermistor is welded on parallel lines 65, in parallel lines 65 a line As public solder joint 63, this group of semi-finished product are introduced into the injection mold of injection molding machine and are molded again by manipulator or guide rail, just Form two groups of deep water temperature sensors of share one line.

Fig. 6 B shows the plastic cement 64 being molded again, it can be high temperature resistant plastic cement, due to using glass envelope type resistant to high temperature Thermistor 61,66, while electric welding mode resistant to high temperature is used, then sixth embodiment forms high temperature deep water temperature sensing Device, single branch line 62 of tail portion, double doublings 65 pass through peeling after being molded again, or beat terminal hole seat and connect with external circuit. The resistance to how many temperature of high temperature deep water temperature sensor are decided by the heatproof temperature of high temperature resistant plastic cement, because this example is using resistant to high temperature NTC glass envelope thermistor and electric welding mode resistant to high temperature, sixth embodiment are greater than 200 DEG C, and waterproofing grade is according to cladding Determine that waterproofing grade is got in general with the most thin thickness and plastic material characteristic of encapsulation deep water temperature sensor plastic cement Height, plastic cement thickness are thicker.

Above first into sixth embodiment, outer layer plastic cement (second insulating layer) with a thickness of 0.1mm~4mm, it is excellent It is selected as 0.5-2mm.Specifically, outer layer plastic cement with a thickness of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4.0mm.Those skilled in the art can root Corresponding plastic cement thickness is selected according to different waterproofing grade.

In addition, in the above embodiment of the present invention, 30 degree to 50 degree above freezing under " low temperature " or " room temperature " nulling, " high temperature " nulling Upper 100 degree to 250 degree.

In addition, though being described using plastic cement or PCB material as the first insulating materials in above-described embodiment, still It may occur to persons skilled in the art that using other insulating materials, for example, insulating materials include non-conductive fibre, rubber, bakelite, The materials such as film.Similarly, although using plastic cement as the material of second insulating layer, those skilled in the art in above-described embodiment It is contemplated that using other materials, for example, PVC (Poly Vinyl Chioride polyvinyl chloride), XLPVC (crosslinked PVC), XLPE (crosslinking PE), PE (polyethylene), PU (polyether ester, polyurethane), TPE (thermoplastic colloidality elastomer), PP (polypropylene), PO It is any in (propylene oxide), silica gel, rubber and/or polytetrafluoroethylene (PTFE).

Although exemplary embodiment describes the present invention with reference to several, it is to be understood that, term used is explanation and shows Example property, term and not restrictive.The spirit or reality that can be embodied in a variety of forms due to the present invention without departing from invention Matter, it should therefore be appreciated that above-described embodiment is not limited to any of the foregoing details, and the spirit defined by appended claims It all should be accompanying power with the whole change and modification widely explained, therefore fallen into claim or its equivalent scope in range Benefit requires to be covered.

Claims (10)

1. a kind of temperature sensor characterized by comprising

NTC thermistor；

Two parallel wires being bonded respectively with the NTC thermistor both ends, two parallel wires are by the first insulation material Material is isolated；

Second insulation material layer at least covers the NTC thermistor and first insulating materials.

2. temperature sensor as described in claim 1, which is characterized in that first insulating materials includes glue, plastic cement, fibre At least one of dimension, pcb board, rubber, bakelite, film, second insulation material layer include polyvinyl chloride, crosslinked PVC, friendship Join PE, polyethylene, polyether ester, polyurethane, thermoplastic colloidality elastomer, polypropylene, propylene oxide, silica gel, rubber or polytetrafluoroethyl-ne At least one of alkene.

3. temperature sensor as described in claim 1, which is characterized in that the NTC thermistor includes single-ended glass seal temperature-sensitive Resistance, diode type thermistor, bare die type thermistor or patch-type thermistor.

4. temperature sensor as described in claim 1, which is characterized in that the thickness of the second insulation material layer are as follows: 0.1mm~ 4mm。

5. temperature sensor as described in claim 1, which is characterized in that the second insulation that the NTC thermistor is covered There is electroplated metal layer on layer, or is cased with metal tube, or be stained with metal sticker.

6. a kind of temperature sensor characterized by comprising

First NTC thermistor；

Second NTC thermistor；

First conducting wire, the second conducting wire and privates parallel to each other, wherein one end of first NTC thermistor is bonded to First conducting wire, the other end of first NTC thermistor and one end of the second NTC thermistor are bonded to second together and lead Line, the other end of second NTC thermistor are bonded to privates, first conducting wire, the second conducting wire and privates It is isolated by the first insulating materials；

Second insulation material layer at least covers first NTC thermistor, the 2nd NTC thermistor and first insulation Material.

7. temperature sensor as claimed in claim 6, which is characterized in that first insulating materials includes glue, plastic cement, fibre At least one of dimension, pcb board, rubber, bakelite, film, second insulation material layer include polyvinyl chloride, crosslinked PVC, friendship Join PE, polyethylene, polyether ester, polyurethane, thermoplastic colloidality elastomer, polypropylene, propylene oxide, silica gel, rubber or polytetrafluoroethyl-ne At least one of alkene.

8. temperature sensor as claimed in claim 6, which is characterized in that first NTC thermistor and the 2nd NTC temperature-sensitive Either one or two of resistance includes single-ended glass seal thermistor, diode type thermistor, bare die type thermistor or patch-type temperature-sensitive Resistance.

9. temperature sensor as claimed in claim 6, which is characterized in that the thickness of the second insulation material layer are as follows: 0.1mm~ 4mm。

10. temperature sensor as claimed in claim 6, which is characterized in that first NTC thermistor and the 2nd NTC heat There is electroplated metal layer in the second insulating layer that quick resistance is covered, or be cased with metal tube, or is stained with metal sticker.