CN214843684U

CN214843684U - Temperature sensor

Info

Publication number: CN214843684U
Application number: CN202120889186.6U
Authority: CN
Inventors: 吴津宁; 杨广良; 周旋
Original assignee: Guangdong Enaiter Electrical Appliances Co Ltd
Current assignee: Guangdong Enaiter Electrical Appliances Co Ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2021-11-23
Anticipated expiration: 2031-04-27

Abstract

The utility model discloses a temperature sensor, it includes: the pipeline assembly is arranged in a U shape and comprises a lead, a thermistor and at least one layer of first insulating rubber tube, the thermistor is connected on the lead in series, and the first insulating rubber tube is sleeved on the lead and enables the thermistor to be positioned on the inner side of the first insulating rubber tube; the insulating pipe cap is sleeved on the end part of the pipeline assembly, the thermistor is located on the inner side of the insulating pipe cap, and a heat-conducting adhesive layer is filled in the inner cavity of the insulating pipe cap. Through above-mentioned structure, the line skin, first insulating rubber tube, second insulating rubber tube, heat-conducting glue layer and the insulating pipe cap of wire all can form insulation protection, and the sinle silk and the thermistor of wire have and are no less than the three-layer insulation protection, and it can make temperature sensor have good insulating properties, improves its security when using.

Description

Temperature sensor

Technical Field

The utility model relates to a temperature measurement technical field, in particular to temperature sensor.

Background

For some appliances, it is generally necessary to provide a temperature sensor to detect the heating temperature of the appliance or the temperature rise of the appliance itself. Generally, the temperature sensor adopts a thermistor structure, the thermistor has different resistance values along with the change of temperature, and the temperature of the environment where the temperature sensor is located can be converted by detecting the resistance value change of the thermistor. However, some conventional temperature sensors have poor insulating properties, and have low safety because of electric leakage caused by insufficient insulating strength in a long-term use process; some electrical apparatus are provided with ground protection structure, and temperature sensor corresponds the electric wire that is equipped with connection ground protection structure, and when temperature sensor took place the electric leakage, the ground protection structure circular telegram of electrical apparatus probably can make electrical apparatus take place circuit fault (for example burn chip, explode machine, fried board, burn circuit components and parts etc.), has shortened electrical apparatus's life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a temperature sensor, it can have better insulating properties.

In order to solve the above problem, the utility model provides a temperature sensor, it includes: the pipeline assembly is arranged in a U shape and comprises a lead, a thermistor and at least one layer of first insulating rubber tube, the thermistor is connected in series on the lead, and the first insulating rubber tube is sleeved on the lead and enables the thermistor to be positioned on the inner side of the first insulating rubber tube; the insulating pipe cap is sleeved at the end part of the pipeline assembly, the thermistor is located on the inner side of the insulating pipe cap, and a heat-conducting adhesive layer is filled in the inner cavity of the insulating pipe cap.

According to a temperature sensor, the tip of pipeline subassembly is equipped with the insulating rubber tube of second in the inboard cover of insulating tube cap, thermistor is located the inboard of the insulating rubber tube of second.

According to a temperature sensor, the outside cover of insulating tube cap is equipped with the first protective tube cap of looks adaptation, the bottom of insulating tube cap is located the inboard of first protective tube cap.

According to a temperature sensor, first insulation rubber tube and the insulating rubber tube of second stretch out first protection tube cap downwards, and the inboard below of insulating tube cap of first protection tube cap is filled and is provided with the fixed glue film of first insulation.

According to a temperature sensor, the outside cover of insulating tube cap is equipped with the protection tube housing of looks adaptation, the protection tube housing is stretched out to the upper end of insulating tube cap, and the lower extreme is located the inboard of protection tube housing to make thermistor be located the top of protection tube housing.

According to a temperature sensor, first insulation rubber tube and/or the insulating rubber tube of second stretch out the protection tube cover downwards, and the inboard of protection tube cover is filled between the below of insulating pipe cap and is provided with the insulating fixed glue film of second.

According to a temperature sensor, first insulation rubber tube sets up to more than two-layer.

According to a temperature sensor, the outside cover of insulating tube cap is equipped with the second protection tube cap of looks adaptation, the bottom of insulating tube cap is located the inboard of second protection tube cap.

According to a temperature sensor, first insulation rubber tube stretches out second protection pipe cap downwards, and the inboard below of insulating pipe cap of second protection pipe cap is filled and is provided with the insulating fixed glue film of third.

The scheme has at least one of the following beneficial effects: through above-mentioned structure, the line skin, first insulating rubber tube, second insulating rubber tube, heat-conducting glue layer and the insulating pipe cap of wire all can form insulation protection, and the sinle silk and the thermistor of wire have and are no less than the three-layer insulation protection, and it can make temperature sensor have good insulating properties, improves its security when using.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

FIG. 1 is a cross-sectional view of a first embodiment of a temperature sensor;

FIG. 2 is an enlarged view of portion A shown in FIG. 1;

FIG. 3 is a cross-sectional view of a second embodiment of a temperature sensor;

fig. 4 is an enlarged view of a portion B shown in fig. 3;

FIG. 5 is a cross-sectional view of a third embodiment of a temperature sensor;

fig. 6 is an enlarged view of a portion C shown in fig. 5;

FIG. 7 is a cross-sectional view of a pipeline assembly.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper and lower directions, is the orientation or positional relationship shown on the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, a first embodiment of the present invention includes a pipeline assembly 10, an insulating cap 20, a second insulating hose 41, and a first protective cap 42. The pipeline assembly 10 is U-shaped, the pipeline assembly 10 comprises a lead 11, a thermistor 12 and a first insulating rubber tube 13, the thermistor 12 is connected on the lead 11 in series, and the first insulating rubber tube 13 is sleeved on the lead 11 and enables the thermistor 12 to be located on the inner side of the first insulating rubber tube 13. The end of the pipeline assembly 10 is sleeved with the insulating pipe cap 20, the thermistor 12 is located on the inner side of the insulating pipe cap 20, a second insulating rubber pipe 41 is sleeved on the inner side of the insulating pipe cap 20 on the end of the pipeline assembly 10, the thermistor 12 is located on the inner side of the second insulating rubber pipe 14, and the inner cavity of the insulating pipe cap 20 is filled with the heat conducting rubber layer 30.

The outside cover of insulating tube cap 20 is equipped with the first protective tube cap 42 of looks adaptation, and the length of first protective tube cap 42 is greater than the length of insulating tube cap 20 to the bottom of messenger insulating tube cap 20 is located the inboard of first protective tube cap 42. The first insulating rubber pipe 13 and the second insulating rubber pipe 41 extend downwards out of the first protecting pipe cap 42, and a first insulating fixing rubber layer 43 is filled below the insulating pipe cap 20 on the inner side of the first protecting pipe cap 42.

During production, firstly, the first insulating rubber tube 13 is sleeved on the lead 11 and the thermistor 12, then the first insulating rubber tube 13 is heated and shrunk to enable the first insulating sleeve to be tightly attached to the lead 11 and the thermistor 12, and then the lead 11 and the first insulating sleeve are bent into a U shape to form the pipeline assembly 10; sleeving a second insulating rubber tube 41 on the end part of the pipeline assembly 10, and then heating and shrinking the second insulating rubber tube 41; an insulating pipe cap 20 is sleeved at the end part of the pipeline assembly 10, then liquid heat-conducting glue is filled inside the insulating pipe cap 20, and a heat-conducting glue layer 30 is formed after the heat-conducting glue is cured; the first protective cap 42 is sleeved on the insulating cap 20, and then the liquid insulating fixing glue is filled inside the first protective cap 42, and a first insulating fixing glue layer 43 is formed after the insulating fixing glue is cured. Wherein, the outer wall of the insulating cap 20 is in close contact with the inner wall of the first protective cap 42, and the heat transfer between the two can be performed by means of contact.

With the above structure, the first protective cap 42 can protect the inner structure well, and prevent the inner structure from being scratched to cause the reduction of the insulation performance. The first insulating fixing glue layer 43 may encapsulate the lower end opening of the first protection cap 42 and form an insulating seal. The sheath of the wire 11, the first insulating rubber tube 13, the second insulating rubber tube 41, the heat conducting rubber layer 30 and the insulating tube cap 20 can form insulating protection, the wire core of the wire 11 and the thermistor 12 have insulating protection of not less than three layers, the temperature sensor can have good insulating performance, and a grounding wire does not need to be arranged.

Alternatively, in some embodiments, only one of the first insulating hose 13 and the second insulating hose 41 may extend downward out of the protective sleeve 51.

Referring to fig. 3 and 4, a second embodiment of the present invention includes a pipeline assembly 10, an insulating cap 20, a second insulating hose 41, and a protective sleeve 51. The pipeline assembly 10 is U-shaped, the pipeline assembly 10 comprises a lead 11, a thermistor 12 and a first insulating rubber tube 13, the thermistor 12 is connected on the lead 11 in series, and the first insulating rubber tube 13 is sleeved on the lead 11 and enables the thermistor 12 to be located on the inner side of the first insulating rubber tube 13. The end of the pipeline assembly 10 is sleeved with the insulating pipe cap 20, the thermistor 12 is located on the inner side of the insulating pipe cap 20, a second insulating rubber pipe 41 is sleeved on the inner side of the insulating pipe cap 20 on the end of the pipeline assembly 10, the thermistor 12 is located on the inner side of the second insulating rubber pipe 14, and the inner cavity of the insulating pipe cap 20 is filled with the heat conducting rubber layer 30.

The outer side of the insulating pipe cap 20 is sleeved with a matched protective pipe sleeve 51, the upper end of the insulating pipe cap 20 extends out of the protective pipe sleeve 51, the lower end of the insulating pipe cap 20 is located on the inner side of the protective pipe sleeve 51, the thermistor 12 is located above the protective pipe sleeve 51, and the outer wall of the insulating pipe cap 20 is in close contact with the inner wall of the protective pipe sleeve 51. The first insulating rubber hose 13 and the second insulating rubber hose 41 extend downwards out of the protection pipe sleeve 51, and a second insulating fixing glue layer 52 is filled between the inner side of the protection pipe sleeve 51 and the lower part of the insulating pipe cap 20.

With the above structure, the heat source may directly contact the insulative cap 20, so that the thermistor 12 can sense the temperature change and change its resistance value more quickly, and the sensitivity and accuracy of temperature measurement can be improved. The protective sleeve 51 can well protect the inner structure of the protective sleeve, and the insulation performance of the inner structure is prevented from being reduced due to scratching. The second insulating fixing glue layer 52 can encapsulate the lower end opening of the protection pipe sleeve 51 and form an insulating protection. The sheath of the wire 11, the first insulating rubber tube 13, the second insulating rubber tube 41, the heat conducting rubber layer 30 and the insulating tube cap 20 can form insulating protection, the wire core of the wire 11 and the thermistor 12 have insulating protection of not less than three layers, the temperature sensor can have good insulating performance, and a grounding wire does not need to be arranged.

Referring to fig. 5 and 6, a third embodiment of the present invention includes a pipeline assembly 10, an insulating cap 20, and a second protective cap 61. The pipeline assembly 10 is U-shaped, the pipeline assembly 10 comprises a lead 11, a thermistor 12 and a first insulating rubber tube 13, the thermistor 12 is connected on the lead 11 in series, and the first insulating rubber tube 13 is sleeved on the lead 11 and enables the thermistor 12 to be located on the inner side of the first insulating rubber tube 13. The insulating cap 20 is sleeved on the end of the pipeline assembly 10, the thermistor 12 is located inside the insulating cap 20, and the inner cavity of the insulating cap 20 is filled with a thermal conductive adhesive layer 30.

The first insulating rubber tube 13 is provided with two or more layers, for example, three layers. The outside cover of insulating tube cap 20 is equipped with the second protective tube cap 61 of looks adaptation, and the length of second protective tube cap 61 is greater than the length of insulating tube cap 20 to the bottom of insulating tube cap 20 is located the inboard of second protective tube cap 61. The first insulating rubber tube 13 extends downwards out of the second protection tube cap 61, and a third insulating fixing rubber layer 63 is filled below the insulating tube cap 20 on the inner side of the second protection tube cap 61.

The second protective cap 61 can protect the inner structure well, and prevent the inner structure from being scratched to cause the reduction of the insulation performance. The third insulating fixing glue layer 62 can encapsulate the lower end opening of the second protection pipe cap 61 and form an insulating seal. The wire skin of the wire 11, the first insulating rubber tube 13 with more than two layers, the heat conducting rubber layer 30 and the insulating pipe cap 20 can form insulating protection, the wire core of the wire 11 and the thermistor 12 have insulating protection with not less than three layers, the temperature sensor can have good insulating performance, and a grounding wire does not need to be arranged.

In the above embodiments, the insulating pipe cap 20 may be made of high thermal conductivity ceramic, the insulating rubber pipes may be made of high thermal conductivity plastic capable of being processed by thermal shrinkage, and the thermal conductive adhesive layer 30 may be made of high thermal conductivity silicone grease, so that the temperature sensor has good thermal conductivity, the thermal conductivity efficiency is improved, and the detection accuracy and sensitivity of the temperature sensor are further improved. Most of the silicone grease on the market at present has good insulating property, so that the silicone grease can be used as a stable heat conduction material for electronic components. The first protective cap 42, the second protective cap 61 and the protective sleeve 51 may be made of metal such as stainless steel, copper, aluminum, etc.

Of course, in some embodiments, the temperature sensor may not be provided with the first protective cap 42, the second protective cap 61, and the protective sleeve 51 to reduce the cost of the temperature sensor, while still having good insulating properties.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A temperature sensor, comprising:

the pipeline assembly (10) is arranged in a U shape and comprises a lead (11), a thermistor (12) and at least one layer of first insulating rubber tube (13), the thermistor (12) is connected on the lead (11) in series, and the first insulating rubber tube (13) is sleeved on the lead (11) and enables the thermistor (12) to be located on the inner side of the first insulating rubber tube (13);

the insulating pipe cap (20) is sleeved at the end part of the pipeline assembly (10), the thermistor (12) is located on the inner side of the insulating pipe cap (20), and a heat-conducting glue layer (30) is filled in the inner cavity of the insulating pipe cap (20).

2. A temperature sensor according to claim 1, wherein the end of the line assembly (10) is sleeved with a second insulating rubber tube (41) on the inner side of the insulating rubber tube cap (20), and the thermistor (12) is positioned on the inner side of the second insulating rubber tube (41).

3. A temperature sensor according to claim 2, wherein the outside of the insulating cap (20) is sleeved with a first adaptive protecting cap (42), and the bottom of the insulating cap (20) is located inside the first protecting cap (42).

4. A temperature sensor according to claim 3, wherein the first insulating rubber hose (13) and the second insulating rubber hose (41) downwardly extend out of the first protective pipe cap (42), and the inner side of the first protective pipe cap (42) is filled with a first insulating fixing rubber layer (43) below the insulating pipe cap (20).

5. A temperature sensor according to claim 2, characterized in that the insulating cap (20) is provided with a suitable protective sleeve (51) on the outside, the insulating cap (20) extends beyond the protective sleeve (51) at its upper end and is provided with a lower end on the inside of the protective sleeve (51), and the thermistor (12) is arranged above the protective sleeve (51).

6. A temperature sensor according to claim 5, characterized in that the first insulating rubber hose (13) and/or the second insulating rubber hose (41) extends downwards out of the protective pipe sleeve (51), and a second insulating fixing glue layer (52) is filled between the inner side of the protective pipe sleeve (51) and the lower part of the insulating pipe cap (20).

7. A temperature sensor according to claim 1, wherein the first hose (13) is provided in two or more layers.

8. A temperature sensor according to claim 7, wherein the outside of the insulating cap (20) is sleeved with a second adaptive protecting cap (61), and the bottom of the insulating cap (20) is located at the inside of the second protecting cap (61).

9. A temperature sensor according to claim 8, wherein the first insulating rubber tube (13) extends downwards out of the second protective tube cap (61), and the inner side of the second protective tube cap (61) is filled with a third insulating fixing rubber layer (63) below the insulating tube cap (20).