CN103398795A - Water-proof and damp-proof temperature sensor - Google Patents
Water-proof and damp-proof temperature sensor Download PDFInfo
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- CN103398795A CN103398795A CN2013103543791A CN201310354379A CN103398795A CN 103398795 A CN103398795 A CN 103398795A CN 2013103543791 A CN2013103543791 A CN 2013103543791A CN 201310354379 A CN201310354379 A CN 201310354379A CN 103398795 A CN103398795 A CN 103398795A
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Abstract
The invention belongs to the technical field of electronic components, and provides a water-proof and damp-proof temperature sensor, which includes a thermosensitive chip placed in a casing and a connector placed at the outer part of the casing, wherein the thermosensitive chip and the connector are connected through PVC sheathed lines; the thermosensitive chip is provided with three silica gel sealing layers; the thermosensitive chip is wrapped with the first silica gel sealing layer in a sealing manner, and then is wrapped, sealed and solidified by epoxy encapsulating material; the thermosensitive chip, pins and welding points of the thermosensitive chip and the pins with the PVC sheathed lines are wrapped with the second silica gel sealing layer in a sealing manner, and then are wrapped, sealed and solidified by epoxy encapsulating material; the third silica gel sealing layer extends to a protective sheath of the PVC sheathed lines, so as to wrap and seal a sensing head of the entire sensor. Epoxy potting compound is filled in the casing in a sealing manner, and the seal is realized through three layers of silica gel, so that the problem that the testing accuracy and service life are influenced as the temperature sensor is in a damp environment for a long time is solved; as the silica gel seal is adopted, the water-proof and damp-proof temperature sensor is anti-aging, resistant to high temperature, and excellent in water-proof, damp-proof and anti-aging effects, ensures the service life, and can be widely applied in the field of electronic products.
Description
Technical field
The invention belongs to technical field of electronic components, be specifically related to a kind of waterproof and dampproof temperature sensor.
Background technology
Along with the development of society, various electric equipments and Smart Home use more extensive, and each uses territorial environment to be not quite similar, thereby requires each electric equipment and Smart Home to work under various environment, particularly under moist environment.This just requires various electronic devices and components energy moistureproof damp proof; require as the temperature sensor that plays temperature protection, detection, compensation in electric equipment and Smart Home product stricter, with reach to the temperature of working environment accurately survey, protect, the effect of control etc.
As shown in Figure 1, present temperature sensor comprises the temperature-sensitive chip 1 that is arranged in housing and is arranged on the outer connector 7 of housing 3, be provided with two groups of pins 2 on described temperature-sensitive chip 1, and with epoxy encapsulating material 4, seal, described pin 2 is connected by RVV 6 with connector 7, the interior embedding PGL 5 of housing 3, be used for solidifying temperature-sensitive chip 1.The moistureproof wetting resistance of the temperature sensor that prior art is made is poor, is not suitable for the environmental applications in humidity.While working under the environment of humidity, the joint space that water is easy between core 62, insulation course 61, restrictive coating 6 is penetrated into pin 2, insuperior because of the humidity resistance of epoxy encapsulating material own simultaneously, be penetrated into the water of pin 2 again by the direct temperature-sensitive chip contact of infiltration epoxy encapsulating material 4.Because water has certain electric conductivity, when being penetrated into the temperature-sensitive chip, directly can cause in water resistance value to descend or unstable, thus accurate transmission of signal, and while temperature-sensitive chip is silver electrode mostly, when working, the hydrone that penetrates on the temperature-sensitive chip produces electrolysis when electrical equipment.Produce oxidation reaction at anode, silver ion is combined with hydroxide ion and is generated silver hydroxide.Produce reduction reaction, silver hydroxide and hydrogen ion reaction at negative electrode and generate silver and water.Due to electrode reaction, the silver ion of anode constantly becomes discontinuous metal silver granuel to cathodic reduction, connects into tree-shaped anode by moisture film and extends.The silver ion migration does not occur over just the inorganic medium surface; silver ion can also be diffused into inorganic medium inside; thereby cause between electrode and also diminish apart from the resistance value that diminishes; can make dead short between two silver electrodes when serious; affect the accuracy of temperature sensor, can not the satisfied temperature sensor to the requirement of the work such as the protection of the detection of environment, circuit and control.
Summary of the invention
The present invention overcomes the defect of above-mentioned technology, provides a kind of moisture resistance good, the waterproof and dampproof temperature sensor of stable performance.
In order to address the above problem, the present invention is achieved by following technical scheme:
Waterproof and dampproof temperature sensor of the present invention, comprise and be arranged on the interior temperature-sensing element of housing and be connected the connector that housing is outer and with temperature-sensing element, be connected, described temperature-sensing element is provided with two groups of pins that are used for connecting wire, and described temperature-sensing element surface is provided with multilayer and is used for waterproof and dampproof sealant.
Further, aging in order to prevent, increase the service life, described sealant is layer of silica gel.
Good for waterproof and dampproof ageing resistance, described layer of silica gel is three layers, and wherein the ground floor layer of silica gel is with the temperature-sensing element environmental sealing; Second layer layer of silica gel is with whole temperature-sensing element and pad environmental sealing; The 3rd layer of layer of silica gel is with whole temperature-sensing element and two groups of pin environmental sealings; Being provided with the epoxy encapsulating material between every layer of layer of silica gel protects.
Further, in order to ensure its stability, described temperature-sensing element is NTC temperature-sensitive chip.
Further, described pin is connected by the PVC RVV with connector.
Further, for waterproof and dampproof anti-aging better, described the 3rd layer of layer of silica gel extends to an end of PVC RVV, with whole sensing head environmental sealing.
Further, embedding PGL in described housing, be fixed on sensor in housing.
A kind of method of making described waterproof and dampproof temperature sensor is as follows:
1) two groups of pins of NTC temperature-sensitive chip are welded, seal ground floor silica gel, with the complete environmental sealing of NTC temperature-sensitive chip, because silica gel has very strong protection against the tide, high temperature resistant, ageing resistance, silica gel with NTC temperature-sensitive chip environmental sealing after, can effectively prevent infiltrating of moisture, thereby greatly improve the humidity resistance of product.And then bag epoxy encapsulating material is sealed curing protection ground floor silica gel;
2) with packaged NTC temperature-sensitive chips welding on the PVC RVV, seal second layer silica gel,, with NTC temperature-sensitive chip, pin and the whole environmental sealings of pad, stop the moisture content that infiltrates by the joint space between core 62, insulation course 61, restrictive coating 6 to continue again infiltration.And then with the epoxy encapsulating material, seal and solidify protection second layer silica gel, the epoxy encapsulating material just is combined with the protective sleeve of PVC RVV;
3) the 3rd layer of silica gel is set outside second layer epoxy encapsulating material, with the sensing head of whole sensor parcel, the 3rd layer of silica gel extends to PVC RVV protective sleeve position;
4) sensor that will seal three layers of silica gel inserts in housing, then the embedding PGL, is cured;
5) other end in the PVC RVV has welded connector, completes the making of temperature sensor.
Compared with prior art, the invention has the beneficial effects as follows:
1, the layer of silica gel of three layers, realize multilayer proofing,, even temperature sensor is in moist environment for a long time, also do not affect the work quality of element.
2, select silica gel as sealant, anti-aging, guarantee serviceable life, and waterproof and dampproof ageing resistance is very good.
3, silica gel can be high temperature resistant,, even in the liquid below 200 ℃, also can protect NTC temperature-sensitive chip, makes its normal operation.
Description of drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail, wherein:
Fig. 1 is the structural representation of present temperature sensor;
Fig. 2 is the structural representation that the present invention arranges ground floor silica gel;
Fig. 3 is the structural representation that the present invention arranges second layer silica gel;
Fig. 4 is the structural representation that the present invention arranges the 3rd layer of silica gel;
Fig. 5 is structural representation of the present invention.
In figure: 1-NTC temperature-sensitive chip, 2-pin, 3-housing, 4-epoxy resin, 5-PGL, 6-PVC RVV, 61-core insulation course, 62-core, 7-connector, 8-pad, 91-ground floor silica gel, 92-second layer silica gel, the 3rd layer of silica gel of 93-.
Embodiment
As Fig. 2～shown in Figure 5, waterproof and dampproof temperature sensor of the present invention, comprise the NTC temperature-sensitive chip 1 that is arranged in housing 3 and be placed on the outer connector 7 of housing 3, NTC temperature-sensitive chip 1 is connected by PVC RVV 6 with connector 7, be provided with two groups on NTC temperature-sensitive chip 1 and be used for the pin 2 that is connected with wire, the core 62 in PVC RVV 6 is welded to connect with pin 2.
described NTC temperature-sensitive chip 1 surface is provided with three layers of silica gel sealing layer, wherein ground floor silica gel 91 is with NTC temperature-sensitive chip 1 environmental sealing, second layer silica gel 92 is with NTC temperature-sensitive chip 1 and pad 8 environmental sealings, second layer silica gel 92 extends to core insulation course 61 places, the 3rd layer of silica gel 93 is with the sensing head environmental sealing of whole sensor, the 3rd layer of silica gel 93 extends to PVC RVV 6 protective sleeve places, adopt epoxy resin 4 to seal between three layers of silica gel and solidify protection, the described sensor setting of three layers of silica gel that is provided with is in housing 3, and adopt the PGL embedding to solidify protection, reach multiple waterproof and dampproof aging-resistant purpose.
The manufacture method of waterproof and dampproof temperature sensor of the present invention is as follows:
1) two groups of pins 2 of NTC temperature-sensitive chip 1 are welded, seal ground floor silica gel 91, with the complete environmental sealing of NTC temperature-sensitive chip 1, and then with epoxy resin 4, seal and solidify protection ground floor silica gel 91, protection NTC chip 1 is avoided the impact of extraneous mechanical force;
2) packaged NTC temperature-sensitive chip 1 is welded on the interior core 62 of PVC RVV 6, seal second layer silica gel 92, with NTC temperature-sensitive chip 1, pin 2 and the whole environmental sealings of pad 8, second layer silica gel 92 extends to core insulation layer 61 place, and then with epoxy resin 4, solidifying second layer silica gel 92, epoxy resin 4 just is combined with the protective sleeve of PVC RVV 6;
3) the 3rd layer of silica gel 93 is set second layer epoxy resin 4 is outer, with the sensing head of whole sensor parcel, the 3rd layer of silica gel 93 extends to PVC RVV 6 protective sleeve positions;
4) sensor that will seal three layers of silica gel inserts in housing 3, then embedding PGL 5 is cured protection;
5) other end in PVC RVV 6 has welded connector 7, completes the manufacturing of whole temperature sensor.
Other structure of the described waterproof and dampproof temperature sensor of the present embodiment is referring to prior art.
The above, it is only preferred embodiment of the present invention, not the present invention is done any pro forma restriction, therefore every technical solution of the present invention content that do not break away from,, all still belong in the scope of technical solution of the present invention any modification, equivalent variations and modification that above embodiment does according to technical spirit of the present invention.
Claims (8)
1. waterproof and dampproof temperature sensor, comprise and be arranged on the interior temperature-sensing element of housing and be connected the connector that housing is outer and with temperature-sensing element, be connected, described temperature-sensing element is provided with two groups of pins that are used for connecting wire, it is characterized in that: described temperature-sensing element surface is provided with multilayer and is used for waterproof and dampproof sealant.
2. waterproof and dampproof temperature sensor according to claim 1, it is characterized in that: described sealant is layer of silica gel.
3. waterproof and dampproof temperature sensor according to claim 2, it is characterized in that: described layer of silica gel is three layers, and wherein the ground floor layer of silica gel is with the temperature-sensing element environmental sealing; Second layer layer of silica gel is with whole temperature-sensing element and pad environmental sealing; The 3rd layer of layer of silica gel, with whole temperature-sensing element and two groups of pin environmental sealings, is surrounded by the epoxy encapsulating material again and protects between every layer of layer of silica gel.
4. waterproof and dampproof temperature sensor according to claim 1, it is characterized in that: described temperature-sensing element is NTC temperature-sensitive chip.
5. waterproof and dampproof temperature sensor according to claim 3, it is characterized in that: described pin is connected by the PVC RVV with connector.
6. waterproof and dampproof temperature sensor according to claim 3, it is characterized in that: described the 3rd layer of layer of silica gel extends to the top of PVC RVV, with whole sensing head environmental sealing.
7. the described waterproof and dampproof temperature sensor of according to claim 1 to 6 any one is characterized in that: embedding PGL in described housing is fixed on sensor in housing.
8. method of making the described waterproof and dampproof temperature sensor of claim 1 to 7 any one is characterized in that:
1) two groups of pins of NTC temperature-sensitive chip are welded, seal ground floor silica gel, with the complete environmental sealing of NTC temperature-sensitive chip, and then with the epoxy encapsulating material, seal and solidify protection ground floor silica gel;
2) with packaged NTC temperature-sensitive chips welding on the PVC RVV, seal second layer silica gel, with NTC temperature-sensitive chip, pin and the whole environmental sealings of pad, and then with the epoxy encapsulating material, seal and solidify protection second layer silica gel, the epoxy encapsulating material just is combined with the protective sleeve of PVC RVV;
3) the 3rd layer of silica gel is set outside second layer epoxy encapsulating material, with the sensing head of whole sensor parcel, the 3rd layer of silica gel extends to PVC RVV protective sleeve position;
4) sensor that will seal three layers of silica gel inserts in housing, then the embedding PGL, is cured protection;
5) other end in the PVC RVV has welded connector, completes the making of temperature sensor.
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| CN201310354379.1A CN103398795B (en) | 2013-08-14 | 2013-08-14 | A kind of waterproof and dampproof temperature sensor |
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| CN201310354379.1A CN103398795B (en) | 2013-08-14 | 2013-08-14 | A kind of waterproof and dampproof temperature sensor |
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| CN103398795A true CN103398795A (en) | 2013-11-20 |
| CN103398795B CN103398795B (en) | 2015-09-23 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062027A (en) * | 2014-06-13 | 2014-09-24 | 安徽省宁国天成电工有限公司 | Temperature sensor for floor heating |
| CN104964752A (en) * | 2015-06-29 | 2015-10-07 | 苏州工业园区驿力机车科技有限公司 | Temperature sensor applied to automotive engine cooling system and potting method of temperature sensor potting adhesive |
| US20160069750A1 (en) * | 2014-09-10 | 2016-03-10 | Rockwell Automation Technologies, Inc. | Thermal well for transformer and methods |
| CN105865644A (en) * | 2016-05-26 | 2016-08-17 | 句容市博远电子有限公司 | Casing for packaging electronic element and temperature sensor |
| CN106225945A (en) * | 2016-07-26 | 2016-12-14 | 广东爱晟电子科技有限公司 | A kind of waterproof and dampproof temperature sensor and preparation method thereof |
| CN106840426A (en) * | 2017-02-20 | 2017-06-13 | 长沙理工大学 | Flexible water temperature sensor |
| WO2017114084A1 (en) * | 2015-12-31 | 2017-07-06 | 段兆祥 | Manufacturing method for waterproof and moisture-proof temperature sensor, and prepared temperature sensor |
| CN107179134A (en) * | 2017-07-19 | 2017-09-19 | 无锡威孚高科技集团股份有限公司 | A kind of exhaust gas temperature sensor and its manufacture method |
| CN113896512A (en) * | 2021-11-03 | 2022-01-07 | 句容市博远电子有限公司 | Composition for preparing NTC thermistor chip and NTC thermistor prepared from composition |
| CN114097046A (en) * | 2019-10-03 | 2022-02-25 | 株式会社芝浦电子 | Temperature sensor element and method for manufacturing temperature sensor element |
| CN114509171A (en) * | 2022-04-07 | 2022-05-17 | 深圳安培龙科技股份有限公司 | Manufacturing method of temperature sensor and auxiliary device |
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| JP2009115789A (en) * | 2007-10-15 | 2009-05-28 | Denso Corp | Temperature sensor and its manufacturing method |
| CN202048997U (en) * | 2011-05-09 | 2011-11-23 | 肇庆爱晟电子科技有限公司 | Water-proof anti-aging high-reliability temperature sensor |
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| JP2009115789A (en) * | 2007-10-15 | 2009-05-28 | Denso Corp | Temperature sensor and its manufacturing method |
| CN202048997U (en) * | 2011-05-09 | 2011-11-23 | 肇庆爱晟电子科技有限公司 | Water-proof anti-aging high-reliability temperature sensor |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062027A (en) * | 2014-06-13 | 2014-09-24 | 安徽省宁国天成电工有限公司 | Temperature sensor for floor heating |
| US20160069750A1 (en) * | 2014-09-10 | 2016-03-10 | Rockwell Automation Technologies, Inc. | Thermal well for transformer and methods |
| US10317289B2 (en) * | 2014-09-10 | 2019-06-11 | Rockwell Automation Technologies, Inc. | Thermal well for transformer and methods |
| CN104964752A (en) * | 2015-06-29 | 2015-10-07 | 苏州工业园区驿力机车科技有限公司 | Temperature sensor applied to automotive engine cooling system and potting method of temperature sensor potting adhesive |
| WO2017114084A1 (en) * | 2015-12-31 | 2017-07-06 | 段兆祥 | Manufacturing method for waterproof and moisture-proof temperature sensor, and prepared temperature sensor |
| CN105865644A (en) * | 2016-05-26 | 2016-08-17 | 句容市博远电子有限公司 | Casing for packaging electronic element and temperature sensor |
| CN106225945B (en) * | 2016-07-26 | 2018-10-09 | 肇庆爱晟传感器技术有限公司 | A kind of waterproof and dampproof temperature sensor and preparation method thereof |
| CN106225945A (en) * | 2016-07-26 | 2016-12-14 | 广东爱晟电子科技有限公司 | A kind of waterproof and dampproof temperature sensor and preparation method thereof |
| CN106840426A (en) * | 2017-02-20 | 2017-06-13 | 长沙理工大学 | Flexible water temperature sensor |
| CN106840426B (en) * | 2017-02-20 | 2019-07-19 | 长沙理工大学 | Flexible water temperature sensor |
| CN107179134A (en) * | 2017-07-19 | 2017-09-19 | 无锡威孚高科技集团股份有限公司 | A kind of exhaust gas temperature sensor and its manufacture method |
| CN114097046A (en) * | 2019-10-03 | 2022-02-25 | 株式会社芝浦电子 | Temperature sensor element and method for manufacturing temperature sensor element |
| EP3988912A4 (en) * | 2019-10-03 | 2022-09-21 | Shibaura Electronics Co., Ltd. | Temperature sensor element and method for manufacturing temperature sensor element |
| CN114097046B (en) * | 2019-10-03 | 2023-06-06 | 株式会社芝浦电子 | Temperature sensor element and method for manufacturing temperature sensor element |
| CN113896512A (en) * | 2021-11-03 | 2022-01-07 | 句容市博远电子有限公司 | Composition for preparing NTC thermistor chip and NTC thermistor prepared from composition |
| CN114509171A (en) * | 2022-04-07 | 2022-05-17 | 深圳安培龙科技股份有限公司 | Manufacturing method of temperature sensor and auxiliary device |
| CN114509171B (en) * | 2022-04-07 | 2022-07-29 | 深圳安培龙科技股份有限公司 | Manufacturing method of temperature sensor and auxiliary device |
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| CN103398795B (en) | 2015-09-23 |
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Address after: 526020 Guangdong Province, Zhaoqing city Duanzhou District Mu Gang Industrial Zone of Tangxia town Patentee after: GUANGDONG AISHENG ELECTRONIC TECHNOLOGY CO., LTD. Address before: 526020 Guangdong Province, Zhaoqing city Duanzhou District Mu Gang Industrial Zone of Tangxia town Patentee before: EXSENSE Electronics Technology Co., Ltd. |
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Effective date of registration: 20161223 Address after: 526020 Guangdong Province, Zhaoqing city Duanzhou District Mu Gang Industrial Zone of Tangxia town Patentee after: Zhaoqing AI Sheng Sensor Technology Co Ltd Address before: 526020 Guangdong Province, Zhaoqing city Duanzhou District Mu Gang Industrial Zone of Tangxia town Patentee before: GUANGDONG AISHENG ELECTRONIC TECHNOLOGY CO., LTD. |
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