CN213812642U - High-precision miniature NTC temperature sensor - Google Patents
High-precision miniature NTC temperature sensor Download PDFInfo
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- CN213812642U CN213812642U CN202023303679.1U CN202023303679U CN213812642U CN 213812642 U CN213812642 U CN 213812642U CN 202023303679 U CN202023303679 U CN 202023303679U CN 213812642 U CN213812642 U CN 213812642U
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Abstract
The utility model discloses a high-precision micro NTC temperature sensor, which comprises a protective shell and a connecting block; protecting the shell: a clapboard is arranged at the center of the inner part of the thermal insulation board, a thermistor is arranged on the left side surface of the clapboard, a through hole is arranged at the center of the clapboard, and a resistance lead arranged on the right side surface of the thermistor penetrates through the through hole and extends to the right side of the clapboard; connecting a block: the resistor wire is arranged in an installation port in the middle of the right side face of the protective shell, the left side face of the connecting block is provided with wiring grooves which are symmetrical up and down, the resistor wire is fixedly connected with the wiring grooves corresponding to the same side, the right side face of the connecting block is provided with power supply leads which are symmetrical up and down, and the right end of each power supply lead is fixedly connected with an interface on the left side of the power supply connector; this miniature NTC temperature sensor of high accuracy, completion temperature detection work that can be quick to further accelerate thermistor's response speed through high-efficient heat conduction function, guarantee the accuracy of temperature measurement work.
Description
Technical Field
The utility model relates to an electric elements technical field specifically is a miniature NTC temperature sensor of high accuracy.
Background
The NTC temperature sensor is a thermistor and a probe, and the principle is as follows: the resistance value decreases rapidly with increasing temperature. NTC temperature sensors are typically composed of 2 or 3 metal oxides, mixed in a fluid-like clay, and fired to a dense sintered ceramic in a high temperature furnace. The physical dimensions are quite flexible and they can be as small as 0.01 inch or smaller in diameter. The maximum size is almost unlimited, but is typically less than half an inch. In the partial application of NTC temperature sensor, need to ensure that ambient temperature can control in suitable interval, so there is very high requirement to NTC temperature sensor's measurement accuracy, and current NTC temperature sensor, most response speed is comparatively general, can't guarantee the accuracy of temperature measurement work when quick completion temperature detects the work, consequently, in order to solve above-mentioned problem, we have designed a miniature NTC temperature sensor of high accuracy.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome current defect, provide a miniature NTC temperature sensor of high accuracy, completion temperature detection work that can be quick to further accelerate thermistor's response speed through high-efficient heat conduction function, guarantee the accuracy of temperature measurement work, can effectively solve the problem in the background art.
In order to achieve the above object, the utility model provides a following technical scheme: a high-precision miniature NTC temperature sensor comprises a protective shell and a connecting block;
protecting the shell: a clapboard is arranged at the center of the inner part of the thermal insulation board, a thermistor is arranged on the left side surface of the clapboard, a through hole is arranged at the center of the clapboard, and a resistance lead arranged on the right side surface of the thermistor penetrates through the through hole and extends to the right side of the clapboard;
connecting a block: it sets up in the installing port at protecting sheathing right flank middle part, and the left surface of connecting block is equipped with the wiring groove of longitudinal symmetry, and the wiring groove fixed connection that resistance wire and homonymy correspond, and the right flank of connecting block is equipped with the power lead of longitudinal symmetry, and the right-hand member and the left interface fixed connection of power lead, completion temperature detection work that can be quick to further accelerate thermistor's response speed through high-efficient heat conduction function, guarantee the accuracy of temperature measurement work.
Further, be equipped with the plastic hose of longitudinal symmetry between the right flank of connecting block and the left flank of power connection, the outside of power lead is located to the plastic hose cover, and the right side inner wall of wiring groove all is equipped with the ceramic hard tube with between thermistor's the right flank, and the outside of resistance wire is located to the ceramic hard tube cover, can provide insulation protection function for interconnecting link.
Furthermore, the inside left side of protecting sheathing is filled with heat conduction insulation casting glue, and the inside right side of protecting sheathing is filled with the aerogel, can make thermistor respond rapidly and make self resistance value change, guarantees the accuracy of temperature measurement work.
Furthermore, the side left end all is equipped with evenly distributed's dovetail groove around protective housing, and protective housing's inside left side is equipped with evenly distributed's heat conduction pole, and both ends run through protective housing's lateral wall and extend to the dovetail groove that the homonymy corresponds inside around the heat conduction pole, can further accelerate thermistor's response speed.
Furthermore, the protective housing is an alumina protective housing, and can rapidly transfer heat of the external environment to the inside of the protective housing.
Compared with the prior art, the beneficial effects of the utility model are that: this miniature NTC temperature sensor of high accuracy has following benefit:
1. connect power with the outside data detection module and be connected, loop through power lead wire afterwards with the constant current, connecting block and resistance wire input thermistor's inside, constant current is received by outside data detection module again behind the thermistor, can measure the resistance value that thermistor is in under the normal atmospheric temperature condition, when needs carry out temperature detection work, make protective housing be in waiting to detect the environment in, thermistor's resistance value can descend rapidly along with the temperature rise, completion temperature detection work that from this can be quick.
2. In addition, because the thermal conductivity of aluminium oxide and heat conduction insulating casting glue is higher, make protective housing can be fast with the heat transmission of external environment to self inside, the heat transmission is for thermistor to rethread heat conduction insulating casting glue, make thermistor respond rapidly and make self resistance change, guarantee the accuracy of temperature measurement work, because the thermal conductivity of aerogel and ceramic hard tube is lower, can avoid resistance wire to receive the high temperature influence and influence the accuracy of measurement work, trapezoidal groove and heat-conducting rod can further transmit the heat to thermistor, accelerate thermistor's response speed, receive the insulating nature influence of ceramic hard tube and plastic hose, can provide insulating protection function for resistance wire and power supply lead respectively.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is the schematic view of the internal cutting structure of the utility model.
In the figure: 1 protecting sheathing, 2 baffles, 3 thermistors, 4 through-holes, 5 resistance wires, 6 connecting blocks, 7 wiring grooves, 8 power supply leads, 9 power supply connectors, 10 plastic hoses, 11 ceramic hard tubes, 12 heat-conducting insulating pouring sealants, 13 aerogels, 14 trapezoidal grooves and 15 heat-conducting rods.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a high-precision miniature NTC temperature sensor comprises a protective shell 1 and a connecting block 6;
the protective housing 1: a partition plate 2 is arranged at the center of the interior of the thermal insulation board, a thermistor 3 is arranged on the left side face of the partition plate 2, a through hole 4 is arranged at the center of the partition plate 2, a resistor lead 5 arranged on the right side face of the thermistor 3 penetrates through the through hole 4 and extends to the right side of the partition plate 2, and the protective shell 1 is an aluminum oxide protective shell, so that the protective shell 1 can rapidly transmit heat of the external environment to the interior of the protective shell due to the high heat conductivity coefficient of aluminum oxide;
connecting block 6: the constant current detection device is arranged in a mounting hole in the middle of the right side of a protective shell 1, the left side of a connecting block 6 is provided with wiring grooves 7 which are symmetrical up and down, a resistance lead 5 is fixedly connected with the wiring grooves 7 corresponding to the same side, the right side of the connecting block 6 is provided with power leads 8 which are symmetrical up and down, the right end of the power lead 8 is fixedly connected with an interface on the left side of a power connector 9, the power connector 9 is connected with an external data detection module, then constant current is input into a thermistor 3 through the power leads 8, the connecting block 6 and the resistance lead 5 in sequence, the constant current is received by the external data detection module again after passing through the thermistor 3, the resistance value of the thermistor 3 under the normal temperature condition can be measured, when the temperature detection work is required, the protective shell 1 is positioned in an environment to be detected, the resistance value of the thermistor 3 can rapidly decrease along with the temperature rise, therefore, the temperature detection work can be completed quickly.
Wherein: be equipped with the plastic hose 10 of longitudinal symmetry between the right flank of connecting block 6 and the left flank of power connection 9, the outside of power lead 8 is located to plastic hose 10 cover, the right side inner wall of wiring groove 7 all with be equipped with ceramic hard tube 11 between thermistor 3's the right flank, the outside of resistance wire 5 is located to ceramic hard tube 11 cover, receive ceramic hard tube 11 and plastic hose 10's insulating nature influence, can provide insulation protection function for resistance wire 5 and power lead 8 respectively.
Wherein: the inside left side packing of protecting sheathing 1 has heat conduction insulation casting glue 12, the inside right side packing of protecting sheathing 1 has aerogel 13, in addition, because the coefficient of heat conductivity of heat conduction insulation casting glue 12 is higher, make protecting sheathing 1 can be fast with the heat transmission of external environment to self inside, rethread heat conduction insulation casting glue 12 gives thermistor 3 with heat transmission, make thermistor 3 respond rapidly and make self resistance value change, guarantee the accuracy of temperature measurement work, because aerogel 13 and ceramic hard tube 11's coefficient of heat conductivity are lower, can avoid resistance wire 5 to receive the high temperature influence and influence the accuracy of measurement work.
Wherein: the side left end all is equipped with evenly distributed's dovetail groove 14 around protecting sheathing 1, and protecting sheathing 1's inside left side is equipped with evenly distributed's heat conduction pole 15, and both ends run through protecting sheathing 1's lateral wall and extend to the dovetail groove 14 that the homonymy corresponds around heat conduction pole 15 inside, and inside dovetail groove 14 and heat conduction pole 15 can be further give thermistor 3 with heat transfer for thermistor 3's response speed.
When in use: the power connector 9 is connected with an external data detection module, then constant current is input into the thermistor 3 through the power lead 8, the connecting block 6 and the resistance lead 5 in sequence, the constant current is received by the external data detection module again after passing through the thermistor 3, the resistance value of the thermistor 3 at normal temperature can be measured, when temperature detection work is required, the protective shell 1 is in an environment to be detected, the resistance value of the thermistor 3 can rapidly decrease along with temperature increase, so that temperature detection work can be rapidly completed, in addition, the thermal conductivity of the aluminum oxide and the heat-conducting insulating potting adhesive 12 is high, so that the protective shell 1 can rapidly transmit the heat of the external environment to the self-interior, and then the heat is transmitted to the thermistor 3 through the heat-conducting insulating potting adhesive 12, so that the thermistor 3 can rapidly respond to change the self-resistance value, guarantee the accuracy of temperature measurement work, because aerogel 13 and ceramic hard tube 11's coefficient of heat conductivity is lower, can avoid resistance wire 5 to receive the high temperature influence and influence the accuracy of measurement work, dovetail groove 14 and heat-conducting rod 15 can be further give thermistor 3 with heat transfer for thermistor 3's response speed, receive the insulating nature influence of ceramic hard tube 11 and plastic hose 10, can provide the insulation protection function for resistance wire 5 and power lead 8 respectively.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a miniature NTC temperature sensor of high accuracy which characterized in that: comprises a protective shell (1) and a connecting block (6);
protective housing (1): a partition plate (2) is arranged at the center of the interior of the thermal insulation board, a thermistor (3) is arranged on the left side face of the partition plate (2), a through hole (4) is formed in the center of the partition plate (2), and a resistor lead (5) arranged on the right side face of the thermistor (3) penetrates through the through hole (4) and extends to the right side of the partition plate (2);
connecting block (6): the resistance wire connecting device is arranged in a mounting hole in the middle of the right side face of a protective shell (1), wiring grooves (7) which are symmetrical up and down are formed in the left side face of a connecting block (6), a resistance wire (5) is fixedly connected with the wiring grooves (7) corresponding to the same side, power leads (8) which are symmetrical up and down are arranged on the right side face of the connecting block (6), and the right end of each power lead (8) is fixedly connected with an interface on the left side of a power connector (9).
2. A high accuracy micro NTC temperature sensor according to claim 1, characterized in that: be equipped with plastic hose (10) of longitudinal symmetry between the right flank of connecting block (6) and the left surface of power connection (9), the outside of power lead (8) is located to plastic hose (10) cover, and the right side inner wall of wiring groove (7) all is equipped with ceramic hard tube (11) with between the right flank of thermistor (3), and the outside of resistance wire (5) is located to ceramic hard tube (11) cover.
3. A high accuracy micro NTC temperature sensor according to claim 1, characterized in that: the heat-conducting insulating pouring sealant (12) is filled on the left side of the interior of the protective shell (1), and the aerogel (13) is filled on the right side of the interior of the protective shell (1).
4. A high accuracy micro NTC temperature sensor according to claim 1, characterized in that: the side left end all is equipped with evenly distributed's dovetail groove (14) around protecting sheathing (1), and the inside left side of protecting sheathing (1) is equipped with evenly distributed's heat conduction pole (15), and both ends run through the lateral wall of protecting sheathing (1) and extend to inside dovetail groove (14) that the homonymy corresponds around heat conduction pole (15).
5. A high accuracy micro NTC temperature sensor according to claim 1, characterized in that: the protective casing (1) is an alumina protective casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023303679.1U CN213812642U (en) | 2020-12-30 | 2020-12-30 | High-precision miniature NTC temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023303679.1U CN213812642U (en) | 2020-12-30 | 2020-12-30 | High-precision miniature NTC temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213812642U true CN213812642U (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023303679.1U Active CN213812642U (en) | 2020-12-30 | 2020-12-30 | High-precision miniature NTC temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213812642U (en) |
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2020
- 2020-12-30 CN CN202023303679.1U patent/CN213812642U/en active Active
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