Heat-conducting and insulating temperature sensor with rapid reaction

Abstract

The utility model belongs to the technical field of temperature sensors, and particularly discloses a quick-response heat-conducting and insulating temperature sensor, which comprises an insulating body, a metal shell is arranged on the insulating body, a heat-conducting and insulating plate is accommodated in the metal shell, a temperature sensing element is electrically connected onto the heat-conducting and insulating plate in a patch manner, and the temperature sensing element is electrically connected with the metal shell. One surface of the heat-conducting insulating plate is in conductive connection with the metal shell, and the other surface of the heat-conducting insulating plate is in heat-conducting connection with the temperature sensing element. According to the quick-response heat-conducting insulating temperature sensor, one surface of the heat-conducting insulating plate is in conductive connection with the metal shell, and the other surface of the heat-conducting insulating plate is in heat-conducting connection with the temperature sensing element, so that the temperature sensing element can quickly sense the temperature change through the heat-conducting insulating plate and the metal shell, the response time is shortened, and the insulating and pressure-resistant performance is improved; and the temperature measurement is more sensitive and accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature sensors, and in particular relates to a fast-response thermally conductive insulating temperature sensor. Background Art

[0002] As a key component in industrial automation, environmental monitoring, medical equipment and other fields, the performance requirements of temperature sensors are also increasing.

[0003] At present, the chip thermistor temperature sensing products on the market basically use ordinary PCB board + metal sheet, NTC thermistor + metal sheet, and glue-filled sealed product structure, which has the following defects:

[0004] (1) Limited by the thermal conductivity of the circuit board material, it has a great impact on the sensor response time, test sensitivity and accuracy;

[0005] (2) Traditional SMD thermistors are subject to environmental restrictions and can only sense temperature through heat conduction through air, resulting in extremely low test sensitivity.

[0006] (3) The circuit board assembly method is easily affected by environmental moisture, thus affecting the test accuracy and effect;

[0007] (4) There is no insulating material or little insulating material between the temperature sensing element and the metal sheet, resulting in poor voltage resistance and insulation effect of the product.

[0008] Therefore, the inventor is committed to designing a temperature sensor to solve the above problems. Utility Model Content

[0009] The utility model aims to provide a fast-response thermally conductive insulating temperature sensor, which can improve the reaction time and the insulation withstand voltage performance, and measure temperature more sensitively and accurately.

[0010] In order to achieve the above object, a technical solution adopted by the utility model is:

[0011] A fast-response thermally conductive insulating temperature sensor comprises an insulating body, a metal shell is provided on the insulating body, a thermally conductive insulating plate is accommodated in the metal shell, a temperature sensing element is electrically connected to the thermally conductive insulating plate in the form of a patch, one side of the thermally conductive insulating plate is conductively connected to the metal shell, and the other side of the thermally conductive insulating plate is thermally connected to the temperature sensing element.

[0012] As an improvement of the fast-response thermally conductive insulating temperature sensor of the utility model, the thermally conductive insulating plate includes a circuit board and a thermally conductive foil, the thermally conductive foil covers one surface of the circuit board, the temperature sensing element is thermally connected to the circuit board through the thermally conductive foil, and the temperature sensing element is electrically connected to the circuit board.

[0013] As an improvement of the fast-response heat-conducting insulation temperature sensor of the utility model, the thermal conductivity of the circuit board is 170 W / (m·K).

[0014] As an improvement of the fast-response thermally conductive insulating temperature sensor of the utility model, the thermally conductive insulating plate also includes a conductive foil, which covers the other side of the circuit board. The conductive foil is separated from the thermally conductive foil, and the circuit board is conductively connected to the metal shell through the conductive foil.

[0015] As an improvement of the fast-response thermally conductive insulating temperature sensor of the utility model, the circuit board is welded to the metal plate.

[0016] As an improvement of the fast-response thermally conductive insulating temperature sensor of the utility model, the thermally conductive insulating plate is waterproofly and hermetically connected to the metal shell via a sealing moisture-proof adhesive, and the temperature sensing element is an NTC chip thermistor.

[0017] As an improvement of the fast-response thermally conductive insulating temperature sensor of the utility model, the top of the metal shell is concave to form an arc shape and is exposed from the insulating body.

[0018] As an improvement of the fast-response thermally conductive insulating temperature sensor of the utility model, the bottom of the metal shell is hollowed out to form a receiving groove, the thermally conductive insulating plate and the temperature sensing element are located in the receiving groove, and the two opposite sides of the metal shell extend into the insulating body to form a retaining portion.

[0019] As an improvement of the fast-response thermally conductive insulating temperature sensor of the utility model, two plug pins are arranged on the insulating body at intervals, and the two plug pins are electrically connected to the thermally conductive insulating plate through metal wires respectively.

[0020] As an improvement of the fast-response thermally conductive insulating temperature sensor of the utility model, the insulating body and the two pins are both T-shaped, the metal shell is located in the through groove at the top of the insulating body, the two pins are located at the bottom of the insulating body, and V-shaped side grooves are respectively provided on both sides of the fixed end of the pin.

[0021] Compared with the prior art, the fast-response thermally conductive insulating temperature sensor of the utility model utilizes one side of a thermally conductive insulating plate to be conductively connected to a metal shell, and at the same time, the other side of the thermally conductive insulating plate is thermally connected to a temperature sensing element, so that the temperature sensing element can quickly sense temperature changes through the thermally conductive insulating plate and the metal shell, thereby improving the response time and insulation withstand voltage performance, and making temperature measurement more sensitive and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a three-dimensional diagram of the fast-response thermally conductive insulating temperature sensor of the utility model;

[0023] Figure 2 It is a stereogram of the fast-response thermally conductive insulating temperature sensor of the utility model from another perspective;

[0024] Figure 3 It is a three-dimensional exploded view of the fast-response thermally conductive insulating temperature sensor of the utility model;

[0025] Figure 4 It is a three-dimensional assembly enlarged view of the temperature sensing test part of the temperature sensor of the utility model;

[0026] Figure 5 It is a three-dimensional exploded enlarged diagram of the temperature sensing test part of the temperature sensor of the utility model;

[0027] Figure 6 It is a partial cross-sectional enlarged view of the temperature sensing test part of the temperature sensor of the utility model.

[0028] Illustration Description:

[0029] 1. Insulating body; 11. Bottom groove; 12. Boss; 121. Groove; 2. Pin; 21. Through hole; 22. Side groove; 3. Metal shell; 31. Holding portion; 32. Receiving groove; 4. Thermally conductive insulating plate; 41. Conductive foil; 42. Circuit board; 43. Thermally conductive foil; 5. Temperature sensing element; 6. Metal wire. DETAILED DESCRIPTION

[0030] The following is a detailed description of the implementation of the present invention in conjunction with the accompanying drawings. The accompanying drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of the present invention.

[0031] Reference Figures 1 to 6 A fast-response thermally conductive insulating temperature sensor includes an insulating body 1, a thermally conductive insulating plate 4, a metal shell 3 and a temperature sensing element 5. The metal shell 3 is arranged on the insulating body 1, the thermally conductive insulating plate 4 is accommodated in the inner plate of the metal shell 3, and the temperature sensing element 5 is arranged on the thermally conductive insulating plate 4 in a patch manner so that the temperature sensing element 5 is electrically connected to the thermally conductive insulating plate 4, one side of the thermally conductive insulating plate 4 is conductively connected to the metal shell 3, and the other side of the thermally conductive insulating plate 4 is thermally connected to the temperature sensing element 5.

[0032] Reference Figure 4 , Figure 5 and Figure 6The insulating body 1 is T-shaped as a whole, and bosses 12 are respectively provided at the two ends of the top of the insulating body 1 and a through groove is formed at the top of the insulating body 1. V-shaped bottom grooves 11 are provided at the bottoms of the left and right ends of the insulating body 1, and an arc-shaped groove 121 is provided on each boss 12. Two pins 2 are spaced apart at the bottom of the insulating body 1. The two pins 2 are both T-shaped and sealed by the insulating body 1. V-shaped side grooves 22 are respectively provided on both sides of the fixed end of the pin 2. An elliptical through hole 21 is provided at the plug-in end of the pin 2. The side grooves 22 and the through hole 21 are both located outside the insulating body 1, and the two pins 2 are electrically connected to the thermally conductive insulating plate 4 through metal wires 6.

[0033] Reference Figures 3 to 5 The temperature sensing test part of the temperature sensor of the present invention includes a metal shell 3, a heat-conducting insulating plate 4 and a temperature-sensing element 5. The temperature sensing test part of the temperature sensor is located at the top of the insulating body 1. The metal shell 3 is specifically located in the through groove at the top of the insulating body 1. The top of the metal shell 3 is concave to form an arc and exposed to the insulating body 1. The bottom of the metal shell 3 is hollowed out to form a receiving groove 32. The heat-conducting insulating plate 4 and the temperature-sensing element 5 are both located in the receiving groove 32. The temperature-sensing element 5 of the present invention is specifically an NTC chip thermistor. The two opposite sides of the metal shell 3 extend into the insulating body 1 to form a holding portion 31. The two holding portions 31 and the periphery of the metal shell 3 are all buried in the insulating body 1, which can not only make the metal shell 3 and the insulating body 1 more firmly connected, but also make the periphery of the metal shell 3 and the insulating body 1 sealed, so that the heat-conducting insulating plate 4 and the temperature-sensing element 5 in the metal shell 3 are isolated from the outside world.

[0034] Reference Figure 6 The heat-conducting insulating plate 4 is waterproofly and sealedly connected to the metal shell 3 through a sealing moisture-proof adhesive. The heat-conducting insulating plate 4 includes a circuit board 42 and a heat-conducting foil 43. The thermal conductivity of the circuit board 42 is 170 W / (m·K). The heat-conducting foil 43 covers the lower surface (i.e., the bottom) of the circuit board 42. The temperature sensing element 5 is thermally connected to the circuit board 42 through the heat-conducting foil 43, and the temperature sensing element 5 is electrically connected to the circuit board 42.

[0035] Reference Figure 6 The thermally conductive insulating plate 4 further includes a conductive foil 41, which covers the upper surface (i.e., the top) of the circuit board 42. Since the conductive foil 41 is separated from the thermally conductive foil 43, the thermally conductive foil 43 at the bottom of the circuit board 42 is not connected to the conductive foil 41 on the upper surface, so that the thermally conductive foil 43 at the bottom can play another role in heat conduction. The circuit board 42 is electrically connected to the metal shell 3 through the conductive foil 41. Since the circuit board 42 is a material with high thermal conductivity, the temperature can be sensed through the circuit board 42 with the conductive foil 41, or the circuit board 42 can be directly welded to the metal shell 3 (such as copper, aluminum alloy, etc.), and the temperature can be sensed through the metal shell 3, so that more accurate testing can be achieved.

[0036] The utility model has a fast-response thermally conductive insulating temperature sensor, in which one side of a thermally conductive insulating plate 4 is conductively connected to a metal shell 3, and at the same time, the other side of the thermally conductive insulating plate 4 is thermally connected to a temperature sensing element 5, so that the temperature sensing element 5 can quickly sense temperature changes through the thermally conductive insulating plate 4 and the metal shell 3, thereby improving the reaction time (the reaction time is improved from 8 seconds to within 3 seconds) and the insulation withstand voltage performance, and the temperature measurement is more sensitive and accurate.

[0037] The above disclosure is only a preferred embodiment of the present invention, which cannot be used to limit the scope of protection of the present invention. Therefore, equivalent changes made within the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A fast-response thermally conductive insulating temperature sensor, comprising an insulating body, characterized in that: A metal shell is provided on the insulating body, a heat-conducting insulating plate is accommodated in the metal shell, a temperature sensing element is electrically connected to the heat-conducting insulating plate in the form of a patch, one side of the heat-conducting insulating plate is conductively connected to the metal shell, and the other side of the heat-conducting insulating plate is thermally connected to the temperature sensing element.

2. The fast-response thermally conductive insulating temperature sensor according to claim 1, characterized in that: The heat-conductive insulating plate comprises a circuit board and a heat-conductive foil, wherein the heat-conductive foil covers one surface of the circuit board, the temperature sensing element is heat-conductively connected to the circuit board through the heat-conductive foil, and the temperature sensing element is electrically connected to the circuit board.

3. The fast-response thermally conductive insulating temperature sensor according to claim 2, characterized in that: The thermal conductivity of the circuit board is 170 W / (m·K).

4. The fast-response thermally conductive insulating temperature sensor according to claim 2, characterized in that: The heat-conducting insulating plate further comprises a conductive foil, which covers the other surface of the circuit board, and is separated from the heat-conducting foil. The circuit board is conductively connected to the metal shell via the conductive foil.

5. The fast-response thermally conductive insulating temperature sensor according to claim 2, characterized in that: The circuit board is welded to the metal shell.

6. The fast-response thermally conductive insulating temperature sensor according to claim 1, characterized in that: The heat-conducting insulating plate is connected to the metal shell in a waterproof and sealed manner via a sealing moisture-proof adhesive, and the temperature sensing element is an NTC chip thermistor.

7. The fast-response thermally conductive insulating temperature sensor according to claim 1, characterized in that: The top of the metal shell is concave to form an arc shape and is exposed from the insulating body.

8. The fast-response thermally conductive insulating temperature sensor according to claim 1, characterized in that: The bottom of the metal shell is hollowed out to form a receiving groove, the heat-conducting insulating plate and the temperature sensing element are located in the receiving groove, and two opposite sides of the metal shell extend into the insulating body to form a retaining portion.

9. The fast-response thermally conductive insulating temperature sensor according to claim 1, characterized in that: Two plug pins are arranged on the insulating body at intervals, and the two plug pins are electrically connected to the heat-conducting insulating plate through metal wires respectively.

10. The fast-response thermally conductive insulating temperature sensor according to claim 9, characterized in that: The insulating body and the two plug pins are both T-shaped, the metal shell is located in the through slot at the top of the insulating body, the two plug pins are located at the bottom of the insulating body, and V-shaped side slots are respectively provided on both sides of the fixed ends of the plug pins.

Images