CN212988625U - Temperature and humidity NTC sensor - Google Patents
Temperature and humidity NTC sensor Download PDFInfo
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- CN212988625U CN212988625U CN202021790667.3U CN202021790667U CN212988625U CN 212988625 U CN212988625 U CN 212988625U CN 202021790667 U CN202021790667 U CN 202021790667U CN 212988625 U CN212988625 U CN 212988625U
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Abstract
The utility model belongs to the technical field of the sensor, a humiture NTC sensor is related to. The temperature and humidity NTC sensor comprises a first thermistor, a second thermistor and a lead, wherein the first thermistor is a humidity sensing element, the second thermistor is a compensation element, and the lead is electrically connected with the first thermistor and the second thermistor respectively; the first thermistor is fixed at the bottom of the first kovar shell, the second thermistor is fixed at the bottom of the second kovar shell, the first kovar shell and the second kovar shell are fixed on the mounting plate in parallel, the mounting plate divides the first thermistor and the second thermistor into different mounting spaces, and a plurality of small vent holes are formed in the surface of the mounting plate and are arranged on a plate body in contact with the first kovar shell. The temperature and humidity NTC sensor of the structure has the advantages of good stability, difficult oxidation of the internal thermistor, long service life and small occupied space.
Description
Technical Field
The utility model belongs to the technical field of the sensor, concretely relates to humiture NTC sensor.
Background
The sensor is a detection device which is converted into an electric signal or other information output in a required form according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like.
The existing temperature sensor adopts an integrated module such as a built-in counter, a memory and the like to accurately measure temperature, and the humidity sensor also adopts the integrated module. The temperature sensor and the humidity sensor are bound for use, so that the volume is large, and the requirement of electrical miniaturization cannot be met; the existing temperature and humidity sensor adopts a capacitance type sensor, although the accuracy of the capacitance type sensor is high, the sensing speed is high, the oxidation is easy to occur under the corrosion of moisture, the application range is limited, and the service life is short.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: to the above defect, the utility model provides a humiture NTC sensor, stability is good, and inside thermistor is difficult for the oxidation, long service life, and occupation space is little.
The utility model provides a technical scheme that its technical problem adopted as follows: the temperature and humidity NTC sensor comprises a first thermistor, a second thermistor and a lead, wherein the first thermistor is a humidity sensing element, the second thermistor is a compensation element, and the lead is electrically connected with the first thermistor and the second thermistor respectively; the first thermistor is fixed at the bottom of the first kovar shell, the second thermistor is fixed at the bottom of the second kovar shell, the first kovar shell and the second kovar shell are fixed on the mounting plate in parallel, the mounting plate divides the first thermistor and the second thermistor into different mounting spaces, and a plurality of small vent holes are formed in the surface of the mounting plate and are arranged on a plate body in contact with the first kovar shell.
The temperature and humidity NTC sensor introduces a first thermistor and a second thermistor which are fixed on the same mounting plate and are mutually separated into different mounting spaces, the first thermistor used for measuring the humidity is arranged in an environment with a plurality of small air vents, the air in the space can freely circulate, and the second thermistor is arranged in the mounting space sealed by dry air. When the first thermistor and the second thermistor are electrified, the first thermistor and the second thermistor are heated to about 180 ℃ due to joule heat, the self-heating level is used as resistance change for detection, when the two thermistors are both kept in dry air, the resistance values are the same, when the first thermistor is exposed in humid air, due to the difference of thermal conductivity and humidity in proportion, the resistance values of the first thermistor and the second thermistor are different, the resistance difference caused by humidity is equivalent to absolute humidity, and the temperature and humidity measurement accuracy is high, the speed is high, and the stability is good; the first kovar shell and the second kovar shell are adopted, so that the first thermistor and the second thermistor can be prevented from being in a high-temperature and high-humidity environment for a long time, the thermistors are not easy to oxidize, and the service life is long; the first temperature sensor and the second temperature sensor of the temperature and humidity NTC sensor are arranged in parallel, so that the installation space of the sensor can be effectively reduced, and the occupied size is small.
Furthermore, lateral wings are arranged at two ends of the mounting plate, and a mounting hole for fixing is formed in each lateral wing. The two ends of the introduced mounting plate are provided with side wings with mounting holes, the temperature and humidity NTC sensor can be fixed through locking screws penetrating through the mounting holes, the mounting is firm, and the operation is convenient and fast.
Further, the mounting panel border has a plurality of and first kovar shell, the corresponding fixed card of second kovar shell, fixed card is the spring plectrum. Through fixed card with the mounting panel fixed with first kovar shell, second kovar shell, convenient to detach overhauls conveniently.
Further, one end of the lead is provided with a connector. The introduction of the connector can simplify the connection mode between the temperature and humidity NTC sensor and the electrical component, and the installation and maintenance are convenient.
Further, the first thermistor is a gold electrode single-end glass-sealed NTC chip, and the second thermistor is a gold electrode single-end glass-sealed NTC chip. The gold electrode single-end glass-sealed NTC chip is used as a humidity sensing element or a temperature measurement compensation element, so that the stability is good and the reliability is high.
Further, the first kovar shell comprises a first lower bottom plate, a first fixing frame and a first upper fixing sheet, the first fixing frame fixes the first thermistor on the first lower bottom plate, and the first upper fixing sheet is fixed on the outer surface of the mounting plate; the second kovar shell comprises a second lower base plate, a second fixing frame and a second upper fixing plate, the second fixing frame fixes the second thermistor on the second lower base plate, and the second upper fixing plate is fixed on the outer surface of the mounting plate. The first lower base plate, the first fixing frame and the first upper fixing piece are welded by kovar alloy laser, the second lower base plate, the second fixing frame and the second upper fixing piece are welded by kovar alloy laser, the sealing performance and the waterproof performance are good, the first thermistor and the second thermistor can be effectively prevented from being oxidized in high-temperature and high-humidity environments, and the temperature and humidity sensor is long in service life.
Furthermore, the bottom of the first thermistor, which is in contact with the first lower base plate, is coated with heat-conducting silicone grease, and the bottom of the second thermistor, which is in contact with the second lower base plate, is coated with heat-conducting silicone grease. The bottom of the first lower base plate and the bottom of the second lower base plate which are correspondingly contacted with the first thermistor and the second thermistor for temperature measurement are coated with heat-conducting silicone grease, so that the temperature measurement speed is high.
The utility model has the advantages that:
1. the temperature and humidity NTC sensor introduces a first thermistor and a second thermistor which are fixed on the same mounting plate and mutually separated into different mounting spaces, the first thermistor for measuring the humidity is arranged in an environment with a plurality of small air vents, the air in the space can freely circulate, and the second thermistor is arranged in the mounting space sealed by dry air, so that the temperature and humidity measurement accuracy is high, the speed is high, and the stability is good; the first kovar shell and the second kovar shell are adopted, so that the first thermistor and the second thermistor can be prevented from being in a high-temperature and high-humidity environment for a long time, the thermistors are not easy to oxidize, and the service life is long; the first temperature sensor and the second temperature sensor of the temperature and humidity NTC sensor are arranged in parallel, so that the installation space of the sensor can be effectively reduced, and the occupied size is small.
2. The two ends of the introduced mounting plate are provided with side wings with mounting holes, and the temperature and humidity NTC sensor can be fixed through locking screws penetrating through the mounting holes, so that the temperature and humidity NTC sensor is mounted and fastened, and is convenient and fast to operate; the mounting plate is fixed with the first Kovar shell and the second Kovar shell through the fixing cards, so that the mounting plate is convenient to detach and convenient to overhaul; the introduction of the connector can simplify the connection mode between the temperature and humidity NTC sensor and the electrical component, and the installation and maintenance are convenient; the gold electrode single-end glass-sealed NTC chip is used as a humidity sensing element or a temperature measurement compensation element, so that the stability is good and the reliability is high.
3. The first lower base plate, the first fixing frame and the first upper fixing piece are welded by kovar alloy laser, the second lower base plate, the second fixing frame and the second upper fixing piece are welded by kovar alloy laser, the sealing performance and the waterproof performance are good, the first thermistor and the second thermistor can be effectively prevented from being oxidized in a high-temperature and high-humidity environment, and the service life of the temperature and humidity sensor is long; the bottom of the first lower base plate and the bottom of the second lower base plate which are correspondingly contacted with the first thermistor and the second thermistor for temperature measurement are coated with heat-conducting silicone grease, so that the temperature measurement speed is high.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
FIG. 1 is a cross-sectional view of the end of a thermistor according to the present invention;
FIG. 2 is a schematic view of the structure of the present invention;
wherein: 1 is first thermistor, 2 is the second thermistor, 3 is first kovar shell, 3a is first bottom plate, 3b is first mount, 3c is first last stationary blade, 4 is the second kovar shell, 4a is the second bottom plate, 4b is the second mount, 4c is the second and goes up the stationary blade, 5 is the mounting panel, 6 is little air vent, 7 is the flank, 8 is the mounting hole, 9 is fixed card, 10 is the connector, 11 is heat conduction silicone grease, 12 is the wire.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the temperature and humidity NTC sensor includes a first thermistor 1, a second thermistor 2, and a wire 12, where the first thermistor 1 is a humidity sensing element, the second thermistor 2 is a compensation element, the first thermistor 1 is a gold electrode single-ended glass-sealed NTC chip, and the second thermistor 2 is a gold electrode single-ended glass-sealed NTC chip; the lead 12 is respectively electrically connected with the first thermistor 1 and the second thermistor 2, and the other end of the lead 12 is provided with a connector 10; the first thermistor 1 is closely fixed at the bottom of a first kovar shell 3, the second thermistor 2 is closely fixed at the bottom of a second kovar shell 4, the first kovar shell and the second kovar shell are fixed on a mounting plate 5 in parallel, the mounting plate 5 divides the first thermistor 1 and the second thermistor 2 into different mounting spaces, a plurality of small vent holes 6 are arranged on the surface of the mounting plate 5, and the small vent holes 6 are arranged on a plate body contacted with the first kovar shell; two ends of the mounting plate 5 are provided with side wings 7, and each side wing 7 is provided with a mounting hole 8 for fixing; the 5 borders of mounting panel have a plurality of with first kovar shell, the corresponding fixed card 9 of second kovar shell, fixed card 9 is the spring plectrum.
The first kovar shell 3 comprises a first lower bottom plate 3a, a first fixing frame 3b and a first upper fixing piece 3c, the first fixing frame 3b fixes the first thermistor 1 on the first lower bottom plate 3a, and the first upper fixing piece 3c is fixed on the outer surface of the mounting plate 5; the second kovar shell 4 comprises a second lower base plate 4a, a second fixing frame 4b and a second upper fixing plate 4c, the second fixing frame 4b fixes the second thermistor 2 on the second lower base plate 4a, the second upper fixing plate 4c is fixed on the outer surface of the mounting plate 5, the bottom of the first thermistor 1 in contact with the first lower base plate 3a is coated with heat-conducting silicone grease 11, and the bottom of the second thermistor 2 in contact with the second lower base plate 4a is coated with heat-conducting silicone grease 11.
The temperature and humidity NTC sensor introduces a first thermistor and a second thermistor which are fixed on the same mounting plate and mutually separated into different mounting spaces, the first thermistor for measuring the humidity is arranged in an environment with a plurality of small air vents, the air in the space can freely circulate, and the second thermistor is arranged in the mounting space sealed by dry air, so that the temperature and humidity measurement accuracy is high, the speed is high, and the stability is good; the first kovar shell and the second kovar shell are adopted, so that the first thermistor and the second thermistor can be prevented from being in a high-temperature and high-humidity environment for a long time, the thermistors are not easy to oxidize, the service life is long, and the reliability is good; the first temperature sensor and the second temperature sensor of the temperature and humidity NTC sensor are arranged in parallel, so that the installation space of the sensors can be effectively reduced, the installation is convenient, and the occupied volume is small; the first thermistor and the second thermistor are close to the bottom of the corresponding Kovar shell, and heat-conducting silicone grease is coated on the bottom of the shell, so that the temperature measuring speed is high.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The temperature and humidity NTC sensor comprises a first thermistor, a second thermistor and a lead, wherein the first thermistor is a humidity sensing element, the second thermistor is a compensation element, and the lead is electrically connected with the first thermistor and the second thermistor respectively; the method is characterized in that: the first thermistor is fixed at the bottom of the first kovar shell, the second thermistor is fixed at the bottom of the second kovar shell, the first kovar shell and the second kovar shell are fixed on the mounting plate in parallel, the mounting plate divides the first thermistor and the second thermistor into different mounting spaces, and a plurality of small vent holes are formed in the surface of the mounting plate and are arranged on a plate body in contact with the first kovar shell.
2. The temperature and humidity NTC sensor of claim 1, wherein: the mounting panel both ends are equipped with the flank, are equipped with a mounting hole that is used for fixing on every flank respectively.
3. The temperature and humidity NTC sensor of claim 1, wherein: the mounting panel border has a plurality of and first kovar shell, the corresponding fixed card of second kovar shell, fixed card is the spring plectrum.
4. The temperature and humidity NTC sensor of claim 1, wherein: one end of the lead is provided with a connector.
5. The temperature and humidity NTC sensor of claim 1, wherein: the first thermistor is a gold electrode single-end glass-sealed NTC chip, and the second thermistor is a gold electrode single-end glass-sealed NTC chip.
6. The temperature and humidity NTC sensor of claim 1, wherein: the first kovar shell comprises a first lower bottom plate, a first fixing frame and a first upper fixing sheet, the first fixing frame fixes the first thermistor on the first lower bottom plate, and the first upper fixing sheet is fixed on the outer surface of the mounting plate; the second kovar shell comprises a second lower base plate, a second fixing frame and a second upper fixing plate, the second fixing frame fixes the second thermistor on the second lower base plate, and the second upper fixing plate is fixed on the outer surface of the mounting plate.
7. The temperature and humidity NTC sensor of claim 6, wherein: the bottom of the first thermistor, which is in contact with the first lower base plate, is coated with heat-conducting silicone grease, and the bottom of the second thermistor, which is in contact with the second lower base plate, is coated with heat-conducting silicone grease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021790667.3U CN212988625U (en) | 2020-08-25 | 2020-08-25 | Temperature and humidity NTC sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021790667.3U CN212988625U (en) | 2020-08-25 | 2020-08-25 | Temperature and humidity NTC sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212988625U true CN212988625U (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021790667.3U Active CN212988625U (en) | 2020-08-25 | 2020-08-25 | Temperature and humidity NTC sensor |
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|---|---|
| CN (1) | CN212988625U (en) |
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2020
- 2020-08-25 CN CN202021790667.3U patent/CN212988625U/en active Active
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