Enhancing device capable of improving heat-conducting property of thermosensitive element of sensor

Abstract

A reinforcing device capable of improving the heat conduction performance of a sensor thermosensitive element is characterized in that a plug shell is installed in an inner cavity of a protective shell, a connecting plug is installed in the plug shell, a wiring terminal is inserted into the connecting plug, a heat conduction reinforcing device is arranged at the top end of the inner cavity of the protective shell, and a thermosensitive element is installed in the heat conduction reinforcing device; the thermosensitive element is provided with an element guide pin, and the element guide pin is electrically connected with the wiring terminal. The beneficial effects of the utility model are that the heat conduction enhancing device is additionally arranged on the thermosensitive element, and the gap and air between the thermosensitive element and the housing are reduced through the heat conduction enhancing device, so that the thermosensitive element can sense the external temperature change in time, thereby ensuring that the thermosensitive element is more sensitive and accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to an enhancement device capable of improving the thermal conductivity of a thermal sensitive element of a sensor. Background Art

[0002] A temperature sensor is a sensor that can sense temperature and convert it into a usable output signal. A temperature sensor has a thermistor inside that senses temperature. The thermistor is a device made of sensitive materials whose physical properties change with temperature.

[0003] Existing Chinese patent technology 201621486097.2 discloses a thermistor temperature sensor, including a shell, the shell is composed of an insulating tube, a hexagonal nut and a plug, the interior of the shell is provided with a filler, the interior of the plug is provided with a plug and a terminal, the plug is connected to the terminal, a metal lead and a thermistor are provided inside the insulating tube, one end of the metal lead is connected to the terminal, and the other end is connected to the thermistor, a permanent magnet is provided on the thermistor, one side of the permanent magnet is provided with a temperature-sensitive magnetic steel and the other side is provided with a fixed seat, the temperature-sensitive magnetic steel and the fixed seat are located on the inner wall of the insulating tube, a spring is provided between the permanent magnet and the fixed seat, and the permanent magnet is movably arranged inside the insulating tube through the spring. The utility model effectively protects the thermistor from damage by arranging an over-temperature protection device on the thermistor, and has the advantages of simple structure, convenient use, good use effect, etc.

[0004] Although the prior art effectively protects the thermal element from damage by setting an over-temperature protection device on the thermal element, and has the advantages of simple structure, convenient use, and good use effect, there is still a certain gap between the thermal element and the shell, which affects its thermal conductivity, and thus causes the thermal element to be unable to accept its temperature change in the first time. Summary of the invention

[0005] The purpose of the utility model is to provide an enhancement device that can improve the thermal conductivity of the thermistor element of the sensor in view of the shortcomings and defects in the prior art. By adding a thermal conductivity enhancement device to the thermistor, the gap and air between the thermistor element and the shell are reduced through the thermal conductivity enhancement device, so that the thermistor element can timely sense the changes in its external temperature, thereby ensuring that the thermistor element is more sensitive and accurate.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an enhancement device capable of improving the thermal conductivity of a thermistor of a sensor, comprising a protective shell 4, an inner cavity of the protective shell 4 being provided with a plug shell 7, a connecting plug 8 being provided in the plug shell 7, and a connecting terminal 6 being plugged into the connecting plug 8, a thermal conductivity enhancement device 1 being provided at the top of the inner cavity of the protective shell 4, a thermistor 2 being provided in the thermal conductivity enhancement device 1, an element guide pin 3 being provided on the thermistor 2, and the element guide pin 3 being electrically connected to the connecting terminal 6; the thermal conductivity enhancement device 1 comprising a thermal conductive protective layer 15, the thermistor 2 being arranged in the inner cavity of the thermal conductive protective layer 15, a sealing layer 16 being provided between the thermistor 2 and the thermal conductive protective layer 15, a thermal conductive metal layer 13 being adhered to the front end of the thermal conductive protective layer 15, silicone oil 14 being filled between the thermal conductive metal layer 13 and the sealing layer 16, and a silicone protective film 11 being provided at the front end opening of the thermal conductive protective layer 15.

[0007] Furthermore, a connecting wire 5 is installed on the connecting terminal 6, and the connecting wire 5 and the component lead 3 are crimped to each other.

[0008] Furthermore, the silicone oil 14 wraps the thermosensitive element 2 , and the wrapping area is greater than half of the surface area of ​​the thermosensitive element 2 .

[0009] Furthermore, a thermally conductive silicone grease 12 for bonding the silicone protective film 11 and the thermally conductive metal layer 13 is provided between the silicone protective film 11 and the thermally conductive metal layer 13 .

[0010] Furthermore, a heat dissipation cavity A is provided between the end opening of the heat conductive protection layer 15 and the thermosensitive element 2 .

[0011] Furthermore, a mounting thread 401 is provided on the outer wall of the protection shell 4 .

[0012] After adopting the above technical scheme, the beneficial effect of the utility model is as follows: by adding a thermal conductivity enhancement device to the thermistor, the gap and air between the thermistor and the shell are reduced through the thermal conductivity enhancement device, so that the thermistor can sense the external temperature changes in time, thereby ensuring that the thermistor is more sensitive and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0016] Figure 3 It is a structural schematic diagram of the heat conduction enhancement device in the utility model.

[0017] Explanation of the reference numerals: thermal conductivity enhancing device 1, thermistor 2, element guide pin 3, protective shell 4, connecting wire 5, terminal 6, plug shell 7, connecting plug 8, silicone protective film 11, thermal grease 12, thermal metal layer 13, silicone oil 14, thermal protective layer 15, sealing layer 16, heat dissipation cavity A, mounting thread 401. DETAILED DESCRIPTION

[0018] Example: See Figure 1-Figure 3 As shown, the technical solution adopted in this specific embodiment is: it includes a protective shell 4, the inner cavity of the protective shell 4 is installed with a plug shell 7, the plug shell 7 is installed with a connecting plug 8, and the connecting plug 8 is plugged with a terminal 6, and a thermal conductivity enhancement device 1 is provided at the top of the inner cavity of the protective shell 4, and a thermistor 2 is installed in the thermal conductivity enhancement device 1, and the thermistor 2 is provided with an element guide pin 3, and the element guide pin 3 is electrically connected to the terminal 6; the thermal conductivity enhancement device 1 includes a thermal conductive protective layer 15, the thermistor 2 is arranged in the inner cavity of the thermal conductive protective layer 15, a sealing layer 16 is provided between the thermistor 2 and the thermal conductive protective layer 15, and a thermal conductive metal layer 13 is attached to the front end of the thermal conductive protective layer 15, silicone oil 14 is filled between the thermal conductive metal layer 13 and the sealing layer 16, and a silicone protective film 11 is provided at the front end opening of the thermal conductive protective layer 15.

[0019] More specifically, a connecting wire 5 is installed on the connecting terminal 6, and the connecting wire 5 is crimped with the element lead 3. The connecting wire 5 is connected to the element lead 3, so that the electrical signal of the thermistor 2 is quickly transmitted to the connecting terminal 6.

[0020] More specifically, the silicone oil 14 wraps the thermosensitive element 2, and the wrapping area is greater than half of the surface area of ​​the thermosensitive element 2. The silicone oil 14 has good thermal conductivity and stability, and can well conduct its heat energy to the thermosensitive element 2 and effectively protect the thermosensitive element 2.

[0021] To be more specific, a thermally conductive silicone grease 12 for bonding the silicone protective film 11 and the thermally conductive metal layer 13 is provided between the silicone protective film 11 and the thermally conductive metal layer 13 .

[0022] More specifically, a heat dissipation cavity A is provided between the end opening of the heat-conducting protective layer 15 and the thermosensitive element 2. The heat dissipation cavity A can dissipate heat for the thermosensitive element 2 and facilitate the insertion of the element lead pins 3.

[0023] More specifically, an installation thread 401 is provided on the outer wall of the protective housing 4. The installation thread 401 can facilitate the staff to install the sensor, thereby increasing the installation convenience of the staff. Example

[0024] The difference between this embodiment and the first embodiment is that a thermally conductive silicone grease 12 is filled between the thermally conductive metal layer 13 and the thermally conductive protective layer 15. The thermally conductive silicone grease 12 increases the sealing between the thermally conductive metal layer 13 and the thermally conductive protective layer 15, thereby preventing unnecessary leakage of the silicone oil 14.

[0025] The working principle of the utility model is as follows: when installing and using, the staff can directly install the equipment to the designated position. At this time, the external heat will be conducted to the thermally conductive metal layer 13 through the silicone protective film 11, and quickly conducted to the silicone oil 14 through the thermally conductive metal layer 13, so that the thermistor 2 can quickly sense the external temperature change, and transmit the electrical signal to the terminal 6 through the element lead 3 and the connecting wire 5, and the thermally conductive protective layer 15 can also increase the heat conduction and transmit it to the silicone oil 14, which more specifically ensures that the temperature of the thermistor 2 senses the change, wherein the thickness of the thermally conductive metal layer 13 can be changed according to the thickness of the thermistor 2, and the capacity of the silicone oil 14 can also be increased or decreased accordingly, and the thermal conductivity of the thermistor 2 to the outside world is increased by the thermally conductive metal layer 13 and the silicone oil 14, and the air is reduced. When the thermistor 2 is too small, the silicone protective film 11 and the thermally conductive silicone grease 12 can also be appropriately removed.

[0026] The above is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. An enhancement device for improving the thermal conductivity of a thermal sensitive element of a sensor, characterized in that: It comprises a protective shell (4), the inner cavity of the protective shell (4) is equipped with a plug shell (7), a connecting plug (8) is installed in the plug shell (7), and a connecting terminal (6) is plugged into the connecting plug (8), a thermal conductivity enhancement device (1) is provided at the top of the inner cavity of the protective shell (4), a thermal element (2) is installed in the thermal conductivity enhancement device (1), an element guide pin (3) is provided on the thermal element (2), and the element guide pin (3) is electrically connected to the connecting terminal (6); The thermal conductivity enhancing device (1) comprises a thermal conductive protective layer (15), a thermal sensitive element (2) is arranged in the inner cavity of the thermal conductive protective layer (15), a sealing layer (16) is arranged between the thermal sensitive element (2) and the thermal conductive protective layer (15), a thermal conductive metal layer (13) is attached to the front end of the thermal conductive protective layer (15), silicone oil (14) is filled between the thermal conductive metal layer (13) and the sealing layer (16), and a silicone protective film (11) is arranged at the front end opening of the thermal conductive protective layer (15).

2. The device for improving the thermal conductivity of a thermally sensitive element of a sensor according to claim 1, characterized in that: A connecting wire (5) is installed on the connecting terminal (6), and the connecting wire (5) and the component lead pin (3) are crimped together.

3. The device for improving the thermal conductivity of a thermally sensitive element of a sensor according to claim 1, characterized in that: The silicone oil (14) wraps the thermosensitive element (2), and the wrapping area is greater than half of the surface area of ​​the thermosensitive element (2).

4. The device for improving the thermal conductivity of a thermally sensitive element of a sensor according to claim 1, characterized in that: A thermally conductive silicone grease (12) for bonding the silicone protective film (11) and the thermally conductive metal layer (13) is provided between the silicone protective film (11) and the thermally conductive metal layer (13).

5. The device for enhancing the thermal conductivity of a thermally sensitive element of a sensor according to claim 1, characterized in that: A heat dissipation cavity (A) is provided between the end opening of the heat-conductive protective layer (15) and the thermosensitive element (2).

6. The device for improving the thermal conductivity of a thermally sensitive element of a sensor according to claim 1, characterized in that: The outer wall of the protective shell (4) is provided with a mounting thread (401).

7. The device for improving the thermal conductivity of a thermally sensitive element of a sensor according to claim 1, characterized in that: Thermally conductive silicone grease (12) is filled between the thermally conductive metal layer (13) and the thermally conductive protective layer (15).

Images