Thermistor with thermal expansion protection

Abstract

The utility model belongs to the technical field of thermistors, and particularly relates to a thermistor with thermal expansion protection, which comprises a left shell and a right shell, thermistors are mounted in the left shell and the right shell, and connecting plates are fixedly mounted on the left side and the right side of each thermistor. And the connecting plate is slidably connected with the left and right sides of the surface of the left shell, and mounting boxes are fixedly mounted on the left and right sides of the surface of the left shell. The movable knob drives the threaded rod to rotate, so that the threaded rod can be screwed into the threaded holes, the threaded rod can be connected with different numbers of threaded holes by changing the number of turns of rotation of the threaded rod, and then an external wire is connected with the connecting block. And the resistance value of the thermistor in the product not only can be changed along with the change of the temperature, but also can be changed by connecting the threaded rod with different numbers of connecting plates, so that the resistance value interval of the thermistor can be increased, and the use diversity of the product can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of thermistor technology, specifically relating to a thermistor with thermal expansion protection. Background Technology

[0002] A thermistor is a type of resistive sensor whose resistance changes with temperature. Based on their temperature coefficient, they are classified into positive temperature coefficient (PTC) thermistors and negative temperature coefficient (NTC) thermistors. The resistance of a PTC thermistor increases with increasing temperature, while the resistance of a NTC thermistor decreases with increasing temperature; both are semiconductor devices. The primary reason thermistors require thermal expansion protection is to prevent damage caused by temperature changes.

[0003] The thermistor works on the principle of resistance change caused by temperature variation, and therefore its performance and stability are affected by temperature. This affects its measurement accuracy and reliability. However, in existing technologies, the resistance value of thermistors is within a fixed range, which is determined by temperature and has a small range, making it difficult to adapt to different application requirements. The problem addressed by this device is how to easily expand the resistance value range of the thermistor. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a thermistor with thermal expansion protection, solving the problem of how to easily increase the resistance value range of the thermistor.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a thermistor with thermal expansion protection, comprising a left outer shell and a right outer shell, wherein the thermistor is installed inside the left and right outer shells, and connecting plates are fixedly installed on both sides of the thermistor, and the connecting plates are slidably connected to the left and right sides of the surface of the left outer shell, and mounting boxes are fixedly installed on both sides of the surface of the left outer shell, and the connecting plates are disposed inside the mounting boxes, and three sets of thermistors and connecting plates are provided, and four elastic washers are provided above and below the thermistor, and threaded holes are opened on the surface of the connecting plates, and threaded rods are threadedly installed on the top of the mounting boxes, and the threaded rods are threadedly connected to the inside of the threaded holes, and movable knobs are fixedly installed on the top of the threaded rods, and connecting blocks are fixedly installed on the top of the movable knobs, and wiring holes are opened inside the connecting blocks, and mounting screws are threadedly installed on the surface of the connecting blocks, and two mounting screws are provided on the surface of the connecting blocks.

[0006] Preferably, connecting plates are fixedly installed on the right side of the left outer shell and the left side of the right outer shell, and connecting holes are provided around the perimeter of the surface of the connecting plates.

[0007] Preferably, the internal threads of the connecting hole are fitted with connecting screws, and multiple connecting screws and connecting holes are provided, with the number of connecting screws and connecting holes being the same.

[0008] Preferably, mounting brackets are fixedly installed on the bottom of both the left and right outer shells, and the bottom of the mounting brackets has multiple mounting holes.

[0009] Preferably, the surface of the movable knob is provided with anti-slip grooves, and multiple anti-slip grooves are provided, and the multiple anti-slip grooves are arranged in a circle on the surface of the movable knob.

[0010] Preferably, the elastic gasket is wavy and is movably connected to the inner wall of the left outer casing.

[0011] Preferably, the left outer shell, right outer shell, connecting plate, connecting screws, mounting box and mounting bracket are all made of insulating plastic material.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The threaded rod is rotated by the movable knob, allowing it to be screwed into the threaded hole. By changing the number of rotations, the threaded rod can be connected to different numbers of threaded holes. Then, the external wire is connected to the connecting block. This allows the resistance value of the thermistor in this product to change not only with temperature variations but also by connecting the threaded rod to different numbers of connecting plates. This increases the resistance value range of the thermistor and enhances the versatility of the product's applications. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a first three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a second three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is an internal sectional view of the right-side outer casing of this utility model;

[0018] Figure 4 This is an internal sectional view of the mounting box of this utility model.

[0019] In the diagram: 1. Left outer casing; 2. Right outer casing; 3. Threaded rod; 4. Connecting block; 5. Connecting plate; 6. Connecting screw; 7. Wiring hole; 8. Mounting box; 9. Movable knob; 10. Mounting bracket; 11. Mounting hole; 12. Thermistor; 13. Elastic washer; 14. Connecting plate; 15. Threaded hole; 16. Anti-slip groove; 17. Mounting screw. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides the following technical solution: a thermistor with thermal expansion protection, including a left outer shell 1 and a right outer shell 2. A thermistor 12 is installed inside the left outer shell 1 and the right outer shell 2. A connecting plate 14 is fixedly installed on both the left and right sides of the thermistor 12, and the connecting plate 14 is slidably connected to the left and right sides of the surface of the left outer shell 1. A mounting box 8 is fixedly installed on both the left and right sides of the surface of the left outer shell 1, and the connecting plate 14 is located inside the mounting box 8. There are three sets of thermistors 12 and connecting plates 14. Elastic pads 13 are provided above and below the thermistor 12, and there are four elastic pads 13. A threaded hole 15 is opened on the surface of the connecting plate 14. A threaded rod 3 is threadedly installed on the top of the mounting box 8, and the threaded rod 3 is threadedly connected to the inside of the threaded hole 15. A movable knob 9 is fixedly installed on the top of the threaded rod 3. A connecting block 4 is fixedly installed on the top of the movable knob 9. A wiring hole 7 is opened inside the connecting block 4. A mounting screw 17 is threadedly installed on the surface of the connecting block 4, and there are two mounting screws 17 on the surface of the connecting block 4.

[0022] The threaded rod 3 can be rotated by the movable knob 9. Since the threaded rod 3 is threaded to the bottom of the mounting box 8, the rotation of the threaded rod 3 allows it to move up and down, enabling it to be screwed into the threaded hole 15. By changing the number of rotations, the threaded rod 3 can be connected to different numbers of threaded holes 15. Then, the external wire is inserted into the wiring hole 7 and the mounting screw 17 is tightened to connect the external wire to the connecting block 4. This allows the resistance value of the thermistor 12 in this product to change with temperature. The design can be modified by connecting the threaded rod 3 to different numbers of connecting plates 14, which helps to increase the resistance range of the thermistor 12 and improve the versatility of the product's use. The mounting bracket 10 and mounting holes 11 facilitate the installation and fixation of the product in the required position. The multiple mounting holes 11 ensure the product's secure and reliable installation. The anti-slip grooves 16, arranged circumferentially on the surface of the movable knob 9, increase the surface area of ​​the movable knob 9. Friction prevents the movable knob 9 from slipping when turned. During installation, after installing the thermistor 12 and elastic washer 13 inside the left outer casing 1 and right outer casing 2, the connecting plate 5 on the right side of the left outer casing 1 and the connecting plate 5 on the left side of the right outer casing 2 can fit together, ensuring the connecting holes on the surfaces of the two connecting plates 5 correspond one-to-one. Then, by screwing the connecting screw 6 into the connecting holes, the two connecting plates 5 are easily connected and fixed together, thus completing the installation of the left outer casing 1 and right outer casing 2. The detachable design is advantageous. To increase the ease of use of the product, the wavy shape of the elastic pad 13 allows for greater elasticity, providing better thermal expansion protection for the thermistor 12. The elastic pad 13 can absorb the compressive force generated by the thermal expansion of the thermistor, preventing damage to the thermistor 12 due to compression. Since the left outer shell 1, right outer shell 2, connecting plate 5, connecting screw 6, mounting box 8, and mounting bracket 10 are all made of insulating plastic material, the product is less prone to short circuits or leakage.

[0023] In one aspect of this embodiment, during installation, after the thermistor 12 and the elastic pad 13 are installed inside the left outer shell 1 and the right outer shell 2, the connecting plate 5 on the right side of the left outer shell 1 and the connecting plate 5 on the left side of the right outer shell 2 can be made to fit together, and the connecting holes on the surfaces of the two connecting plates 5 can be made to correspond one-to-one. Then, by screwing the connecting screw 6 into the connecting hole, the two connecting plates 5 can be easily connected and fixed together, thereby completing the installation and assembly of the left outer shell 1 and the right outer shell 2. The detachable design helps to increase the convenience of product use.

[0024] In one aspect of this embodiment, the mounting bracket 10 and mounting holes 11 facilitate the installation and fixation of the product in the required position. Since there are multiple mounting holes 11, it is easy to ensure the firmness and reliability of the product installation. As for the anti-slip grooves 16, since multiple anti-slip grooves 16 are arranged in a circumferential pattern on the surface of the movable knob 9, the friction of the surface of the movable knob 9 can be increased, making it less likely for the movable knob 9 to slip when it is turned.

[0025] In one aspect of this embodiment, the wavy shape of the elastic gasket 13 allows for greater elasticity, providing better thermal expansion protection for the thermistor 12. The elastic gasket 13 absorbs the compressive force generated by the thermal expansion of the thermistor, preventing damage to the thermistor 12 due to compression. Since the left outer shell 1, right outer shell 2, connecting plate 5, connecting screw 6, mounting box 8, and mounting bracket 10 are all made of insulating plastic material, the product is less prone to short circuits or leakage.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A thermistor with thermal expansion protection, comprising a left outer casing (1) and a right outer casing (2), characterized in that: Thermistors (12) are installed inside the left outer shell (1) and the right outer shell (2). Connecting plates (14) are fixedly installed on both sides of the thermistors (12), and the connecting plates (14) are slidably connected to the left and right sides of the surface of the left outer shell (1). Mounting boxes (8) are fixedly installed on both sides of the surface of the left outer shell (1), and the connecting plates (14) are located inside the mounting boxes (8). There are three sets of thermistors (12) and connecting plates (14). Elastic pads (13) are provided above and below the thermistors (12). (13) There are four of them. The surface of the connecting plate (14) is provided with threaded holes (15). The top of the mounting box (8) is threaded with a threaded rod (3), and the threaded rod (3) is threadedly connected to the inside of the threaded hole (15). The top of the threaded rod (3) is fixedly installed with a movable knob (9). The top of the movable knob (9) is fixedly installed with a connecting block (4). The inside of the connecting block (4) is provided with a wiring hole (7). The surface of the connecting block (4) is threaded with a mounting screw (17), and there are two mounting screws (17) on the surface of the connecting block (4).

2. A thermistor with thermal expansion protection according to claim 1, characterized in that: A connecting plate (5) is fixedly installed on the right side of the left outer shell (1) and the left side of the right outer shell (2), and connecting holes are provided around the surface of the connecting plate (5).

3. A thermistor with thermal expansion protection according to claim 2, characterized in that: The internal threads of the connecting hole are fitted with connecting screws (6), and there are multiple connecting screws (6) and connecting holes, and the number of connecting screws (6) and connecting holes is the same.

4. A thermistor with thermal expansion protection according to claim 3, characterized in that: Mounting brackets (10) are fixedly installed on the bottom of the left outer shell (1) and the bottom of the right outer shell (2). The bottom of the mounting brackets (10) is provided with mounting holes (11), and there are multiple mounting holes (11).

5. A thermistor with thermal expansion protection according to claim 1, characterized in that: The surface of the movable knob (9) is provided with anti-slip grooves (16), and there are multiple anti-slip grooves (16), which are arranged in a circle on the surface of the movable knob (9).

6. A thermistor with thermal expansion protection according to claim 1, characterized in that: The elastic gasket (13) is wavy and is movably connected to the inner wall of the left outer shell (1).

7. A thermistor with thermal expansion protection according to claim 4, characterized in that: The left outer shell (1), right outer shell (2), connecting plate (5), connecting screw (6), mounting box (8) and mounting bracket (10) are all made of insulating plastic material.

Images