CN203455105U - Temperature sensor - Google Patents

Abstract

The utility model relates to a temperature sensor, including a hollow sleeve pipe, a temperature conduction spare and a temperature sensing subassembly, this sleeve pipe is made with the slower plastic material of heat transfer rate, this temperature conduction spare is then made with the faster metal material of heat transfer rate, this temperature conduction spare sets up in one of them one end upper portion of this sleeve pipe for supply with the surface contact of the object that awaits measuring, a temperature sensing element such as thermistor among this temperature sensing subassembly sets up in this temperature conduction spare and the indirect measurement should await measuring the temperature data of the object that awaits measuring; the temperature conduction piece has the advantages of small volume and high heat transfer rate, and when heat energy is transferred to the temperature conduction piece, the heat energy does not need to be transferred to the whole sleeve, and the temperature sensing element arranged in the temperature conduction piece can quickly measure temperature data.

Description

temperature sensor

technical field

The utility model relates to a temperature sensor, in particular to a temperature sensor which detects temperature data by contacting with the surface of an object to be measured.

Background technique

Sensors (sensors, detectors) are widely used in many industrial technology fields, especially in applications involving automatic control. Different types of sensors are defined according to the physical parameters they sense, such as temperature, pressure, infrared, liquid sensors etc. Please refer to FIG. 4 , one of the existing temperature sensor structures includes a temperature sensing component 60 and a fixed sleeve 70 .

The fixed sleeve 70 is a long straight cylindrical pipe with the same diameter, and a hollow accommodating chamber 71 is formed inside, and one end of the fixed sleeve 70 is a closed end 72; the temperature sensing component 60 is completely arranged in the accommodating chamber 71 , and the front end of the temperature sensing component 60 is in direct contact with the inner surface of the top end of the accommodating chamber 71 .

When the temperature sensor is used to sense the temperature of the object to be measured, the closed end 72 of the fixed sleeve 70 is in contact with the surface of the object to be measured, and the temperature sensing component 60 then indirectly senses the temperature from the fixed sleeve 70 The temperature sensing data of the object to be measured is obtained.

According to the structure of the aforementioned temperature sensor, since the temperature sensing component 60 is a relatively precise electronic component, the function of the fixing sleeve 70 is to allow the temperature sensing component 60 to be stably arranged inside it to protect the temperature sensing component 60 Avoid being affected by external environmental factors to affect the temperature measurement; therefore, the overall size of the fixed sleeve 70 must have a sufficient length to completely accommodate the temperature sensing component 60 .

However, in actual temperature sensing, since the fixed sleeve 70 is in direct contact with the object to be measured, the heat energy must first be evenly transmitted to the entire fixed sleeve 70 before being transferred to the temperature sensing component 60 . However, the fixed sleeve 70 completely covers the entire temperature-sensing assembly. The relative volume of the fixed sleeve 70 is relatively large, and it takes a long time for the heat energy to be evenly transmitted to the entire fixed sleeve 70. The temperature measurement time of the temperature-sensing assembly 60 is also In addition, if the fixed sleeve 70 itself has absorbed too much heat energy, the temperature data measured by the temperature sensing component 60 cannot reflect the actual temperature of the object to be measured, resulting in accurate As the temperature decreases, the temperature error may increase.

Utility model content

The technical problem to be solved by the utility model is that the existing temperature sensor takes a long time to measure the temperature data, and the error is relatively high.

The technical solution adopted for solving the foregoing technical problems is to provide a temperature sensor, which includes:

A casing made of plastic material, a passage is formed inside, and the two ends of the casing respectively have a first through hole and a second through hole communicating with the passage;

A temperature conducting member made of metal material forms an accommodating chamber inside, one end of the temperature conducting member forms a closed temperature sensing portion, and the other end forms an opening communicating with the accommodating chamber, the temperature conducting member is set On the upper part of the first through hole of the bushing, the temperature sensing part can be in contact with the surface of the object to be measured;

A temperature-sensing component includes a temperature-sensing element, wherein the temperature-sensing element is arranged in the accommodating chamber of the temperature-conducting element.

Wherein, the surface of the temperature conducting element forms a concave joint portion.

Wherein, a flange is formed around the opening of the temperature conducting member.

Wherein, the temperature sensing element has pins, and the pins are connected with a signal line.

Among them, the temperature sensor also includes:

a first fixed piece, which has a first through hole;

A second fixed piece, which is relatively combined with the first fixed piece, the second fixed piece has a groove, and a second through hole is formed on the bottom surface of the groove, the first fixed piece and the second fixed piece are formed with Multiple corresponding fixing holes;

A limiting portion is formed on the surface of the sleeve, and a spring is wound on the outer surface between the limiting portion of the sleeve and the second through hole;

Wherein, the two ends of the sleeve respectively pass through the first through hole and the second through hole of the first fixing piece and the second fixing piece; one end of the spring abuts against the limit portion of the sleeve, and the other end It rests on the inner bottom surface of the groove of the second fixed piece.

Wherein, the diameter of the first through hole of the first fixing piece is smaller than the outer diameter of the upper limit portion of the sleeve; the inner diameter of the groove of the second fixing piece is larger than the outer diameter of the limiter portion.

The beneficial effects that can be achieved by the utility model are: use the temperature conduction member made of metal material with a faster heat transfer rate as the heat transfer medium, and use the plastic material with a slower heat transfer rate to make the casing, so that the heat energy can be concentrated as much as possible on the temperature conductor. The volume size of the temperature conducting element is shorter than that of the casing, and heat energy can be quickly transferred to the temperature sensing element through the temperature conducting element without being transferred to the entire casing. Since the volume of the temperature conducting member is smaller than that of the casing, the temperature sensing element can quickly measure the temperature data of the object to be measured, and the obtained temperature data will be more accurate.

Description of drawings

Fig. 1 is a three-dimensional exploded view of the utility model.

Fig. 2 is a combined sectional view of the utility model.

Fig. 3 is a schematic view of the utility model.

FIG. 4 is an exploded plan view of a conventional temperature sensor.

Detailed ways

The technical means adopted by the utility model to achieve the intended purpose of the utility model are further elaborated below in conjunction with the drawings and preferred embodiments of the utility model.

Please refer to Figure 1 and Figure 2, the temperature sensor of the present invention mainly includes a casing 10, a temperature conducting member 20 and a temperature sensing component 30; according to the actual sensing method, the present invention can further include There is a first fixing piece 41 , a second fixing piece 42 and a spring 50 .

The casing 10 is made of plastic material, and a channel is formed inside, and a first through hole 11 and a second through hole 12 communicating with the channel are respectively formed at both ends, and the outer surface of the sleeve 10 forms a channel. The protruding limiting portion 13, the limiting portion 13 in this embodiment is an annular flange.

The temperature conducting member 20 is arranged on the upper part of the first through hole 11 of the aforementioned bushing 10. The temperature conducting member 20 is made of metal material, and an accommodating chamber 21 is formed inside it. One end of the temperature conducting member 20 is closed. The temperature sensing part 22, and the other end of the temperature conducting member 20 forms an opening 23 communicating with the accommodating chamber 21, and the outer periphery of the opening 23 forms a flange 230; Joint 24. Wherein, in a preferred embodiment, the sleeve 10 is made of plastic injection coating technology and combined with the temperature conducting member 20, so that the plastic material can completely cover the joint part 24 and be connected with the The flange 230 forms a concavo-convex combination to improve the bonding strength between the sleeve 10 and the temperature conducting member 20 .

The temperature sensing component 30 includes a temperature sensing element 31 . The temperature sensing element 31 is disposed inside the accommodating chamber 21 through the opening 23 of the temperature conducting member 20 and directly contacts the temperature conducting member 20 . The temperature sensing element 31 can be a negative temperature coefficient thermistor (NTC) or a positive temperature coefficient thermistor (PTC). The temperature sensing element 31 has pins 310 for transmitting signals, and the ends of each pin 310 It is electrically connected with a signal line 311 , and the sensed temperature signal can be transmitted outside through the signal line 311 .

A first through hole 411 is formed on the first fixing piece 41 , and the diameter of the first through hole 411 is smaller than the outer diameter of the upper limit portion 13 of the sleeve 10 .

The second fixing piece 42 forms a groove 420 , and a second through hole 421 is formed in the center of the bottom surface of the groove 420 . The inner diameter of the groove 420 is larger than the outer diameter of the upper limit portion 13 of the sleeve 10 . Fixing holes 412 and 422 may be formed at both ends of the first fixing piece 41 and the second fixing piece 42 .

The spring 50 is arranged inside the aforementioned groove 420 and sleeved on the outer surface of the sleeve 10 , wherein one end of the spring 50 abuts against the limiting portion 13 and the other end abuts against the inner bottom surface of the groove 420 .

After the temperature sensor of the utility model is assembled, as shown in FIG. 2 , when the aforementioned casing 10 , temperature conducting member 20 and temperature-sensing component 30 are assembled, the end of the casing 10 close to the temperature-sensing part 22 passes through the first fixing piece 41 The other end of the sleeve 10 extends outward through the second through hole 421 of the second fixing piece 42 , and the stopper 13 of the sleeve 10 is affected by the spring 50 and can lean against the first fixing 41 , and the two ends of the spring 50 respectively abut against the bottom surface of the limiting portion 13 and the groove 420 . The fixing holes 412 , 422 of the first fixing piece 41 and the second fixing piece 42 are aligned with each other.

As shown in Figure 3, when the utility model is used to sense the temperature data of an object to be measured 100, the temperature sensing portion 22 of the temperature conducting member 20 is flatly attached to the surface of the object to be measured 100; The aligned fixing holes 412 and 422 stably combine the first fixing piece 41 and the second fixing piece 42 on a substrate 101 . Because the temperature-sensing part 22 abuts against the object 100 to be measured, the bushing 10 moves inwardly in the direction away from the object 100 to be measured. At this time, the spring 50 is compressed and exerts a reverse elastic force on the limiting part 13 . The reverse elastic force is applied to the sleeve 10 so that the temperature sensing portion 22 at the front end can be in closer contact with the surface of the object 100 to be measured, thereby improving the temperature sensing effect and making the temperature sensing effect more accurate.

Compared with the structure of the prior art, the utility model uses the temperature conducting member 20 made of metal material with a faster heat transfer rate as the heat transfer medium, and the sleeve 10 is made of plastic material with a slower heat transfer rate. The volume size of the temperature conducting member 20 is shorter than that of the sleeve 10 , and in actual use, heat energy can be quickly transferred to the temperature sensing element 31 through the temperature conducting member 20 instead of being transferred to the entire sleeve 10 . Because the volume of the temperature conducting member 20 is relatively small relative to the bushing 10, the heat transfer rate will be relatively increased, and the temperature sensing element 31 located inside it can quickly measure the temperature data of the object to be measured, and the obtained temperature data will be More precisely, in a preferred embodiment, the material of the temperature conducting member 20 is made of aluminum material with good heat conduction, which can increase the heat conduction rate, so that the temperature sensing element 31 can sense the temperature data more quickly.

The above description is only the preferred embodiment of the present utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above with the preferred embodiment, it is not intended to limit the utility model, and any person in the field Skilled persons, within the scope of the technical solution of the utility model, should be able to use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes. The technical essence of the utility model makes any simple modifications, equivalent changes and modifications to the above embodiments, all still belong to the scope of the technical solution of the utility model.

Claims (8)

1. a temperature-sensitive sticker, is characterized in that, this temperature-sensitive sticker comprises:

The sleeve pipe that one plastic material is made, its inner formation one passage, and sleeve pipe two ends have respectively one first perforation and one second perforation being connected with this passage;

The temperature conduction part that one metal material is made, its inner accommodation chamber that forms, one end of this temperature conduction part forms a temperature-sensitive portion of closed, the other end forms an opening that is communicated with this accommodation chamber, this temperature conduction part is arranged on the first perforation top of sleeve pipe, and this temperature-sensitive portion can supply and object under test Surface Contact;

One the temperature module, includes a temperature sensor, and wherein this temperature sensor is arranged in the accommodation chamber of this temperature conduction part.

2. temperature-sensitive sticker as claimed in claim 1, is characterized in that, the surface of this temperature conduction part forms the joint portion of an indent.

3. temperature-sensitive sticker as claimed in claim 2, is characterized in that, the around openings of this temperature conduction part forms a flange.

4. the temperature-sensitive sticker as described in claim 1,2 or 3, is characterized in that, this temperature sensor has pin, and this pin is connected with a signal wire.

5. the temperature-sensitive sticker as described in claim 1,2 or 3, is characterized in that, this temperature-sensitive sticker also includes:

One first stator, it has one first through hole;

One second stator, itself and the relative combination of this first stator, this second stator has a groove, and this groove floor forms one second through hole, is formed with the coupling hole of a plurality of correspondences on this first stator and this second stator;

The surface of this sleeve pipe forms a limiting section, winding one spring on the limiting section of this sleeve pipe and the outside surface between the second perforation;

Wherein, the two ends of this sleeve pipe pass respectively the first through hole and second through hole of this first stator and the second stator; One end of this spring is supported on the limiting section of sleeve pipe, and the other end is supported on the inner bottom surface of the groove of the second stator.

6. temperature-sensitive sticker as claimed in claim 4, is characterized in that, this temperature-sensitive sticker also includes:

One first stator, it has one first through hole;

One second stator, itself and the relative combination of this first stator, this second stator has a groove, and this groove floor forms one second through hole, is formed with the coupling hole of a plurality of correspondences on this first stator and this second stator;

The surface of this sleeve pipe forms a limiting section, winding one spring on the limiting section of this sleeve pipe and the outside surface between the second perforation;

Wherein, the two ends of this sleeve pipe pass respectively the first through hole and second through hole of this first stator and the second stator; One end of this spring is supported on the limiting section of sleeve pipe, and the other end is supported on the inner bottom surface of the groove of the second stator.

7. temperature-sensitive sticker as claimed in claim 5, is characterized in that, the aperture of the first through hole of this first stator is less than the external diameter of this sleeve pipe upper limit portion; The internal diameter of the groove of this second stator is greater than the external diameter of this limiting section.

8. temperature-sensitive sticker as claimed in claim 6, is characterized in that, the aperture of the first through hole of this first stator is less than the external diameter of this sleeve pipe upper limit portion; The internal diameter of the groove of this second stator is greater than the external diameter of this limiting section.

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