An air conditioner NTC temperature sensor

Abstract

This invention belongs to the field of sensor technology, and specifically discloses an air conditioner NTC temperature sensor. The air conditioner NTC temperature sensor includes a mounting base with a detection probe at the bottom for detecting temperature changes; a lead wire connected to the detection probe via the mounting base for signal transmission; and a protective component disposed at the connection between the mounting base and the lead wire. This invention, through the action of a buffer sleeve and a limiting ring, ensures that the high-frequency vibrations of the air conditioner fan and compressor are transmitted to the root of the lead wire. The elastic deformation of the buffer sleeve absorbs the vibration energy, dispersing the vibration stress throughout the entire buffer sleeve rather than concentrating it at the connection end between the lead wire and the mounting base, thus extending the lead wire's service life. Furthermore, the limiting ring and moving structure not only solve the problem of vibration or tensile damage at the lead wire root but also prevent excessive deformation of the buffer sleeve, addressing the issue of buffer function attenuation. This ensures long-term stable protection of the lead wire root and maintains the accuracy of signal transmission.

Description

Technical Field

[0001] This invention belongs to the field of sensor technology, and specifically relates to an air conditioner NTC temperature sensor. Background Technology

[0002] The NTC temperature sensor mainly consists of a housing, an NTC thermistor, and waterproof insulated wires. The housing protects the internal NTC thermistor, and the waterproof insulated wires connect to the air conditioning unit. The response time of the temperature sensor is crucial for the rapid cooling or heating of an air conditioner. The air conditioner's NTC temperature sensor is a core sensing component in the air conditioning control system. Essentially a negative temperature coefficient thermistor, it senses temperature changes and converts them into electrical signals, providing control information for the air conditioner's compressor, fan, throttling components, and other actuators. It is a key component for achieving precise temperature regulation, energy-saving operation, and safety protection.

[0003] In existing technologies, air conditioner fans and compressors generate high-frequency vibrations during operation. During use, the root of the sensor lead is subjected to fatigue stress for a long time, which can cause the lead to break, leading to sensor open circuit and air conditioner shutdown, making it inconvenient to use.

[0004] Therefore, it is necessary to invent an air conditioner NTC temperature sensor to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an air conditioner NTC temperature sensor to solve the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An air conditioner NTC temperature sensor includes a mounting base, and a detection probe is provided at the bottom of the mounting base for detecting temperature changes; The lead wire, connected to the detection probe via the mounting base, is used to transmit signals; A protective component is installed at the connection between the mounting base and the lead wire. The protective component includes: The system includes a mounting sleeve, a buffer sleeve, a mounting plate, and a limiting mechanism. The mounting sleeve is located at the top of the mounting base, with the lead wire in the middle for protection. The buffer sleeve is located at the connection end between the lead wire and the mounting base for buffering the vibration force experienced by the lead wire and the mounting base. The buffer sleeve is connected to the top of the mounting base via the mounting plate. The limiting mechanism is located on the mounting plate and the buffer sleeve for limiting the position of the buffer sleeve.

[0007] Furthermore, the buffer sleeve, mounting plate, and limiting mechanism are all located inside the mounting sleeve. The top of the buffer sleeve is located inside the bottom of the limiting ring. The buffer sleeve is made of silicone rubber, and the inner wall of the buffer sleeve is provided with axial anti-slip texture to ensure tight contact with the lead wire and increase friction.

[0008] Furthermore, the limiting mechanism includes a limiting ring, a moving ring, and a moving structure. The limiting ring is located at the top of the buffer sleeve and is used to limit the position of the buffer sleeve. The moving ring is fixedly connected to the middle of the buffer sleeve. The moving structure is located between the limiting ring and the mounting plate and is symmetrically arranged with respect to the center of the moving ring.

[0009] Furthermore, an annular protrusion is provided in the middle of the limiting ring. The limiting ring is made of silicone. The annular protrusion is on the outside of the buffer sleeve. The outer wall of the buffer sleeve and the annular protrusion form a gap fit, which is used to absorb stress through the elastic deformation of the buffer sleeve when it is pulled.

[0010] Furthermore, the mounting sleeve is located at the top of the placement groove, and the mounting plate and the moving ring are also provided with support components. The support components and the moving structure are arranged in a cross shape at the top of the mounting plate to support and limit the buffer sleeve.

[0011] Furthermore, the supporting components include: The mounting plate has a movable block, a first spring, and a telescopic support rod. The movable block is located on the side of the mounting plate near the movable structure. The movable block is connected to the mounting plate by the first spring. The top of the mounting base has a placement groove. The movable block is slidably connected to the inner wall of the bottom of the placement groove. The top of the movable block is hinged to the movable ring. The telescopic support rod is located between the buffer sleeves in a figure-eight configuration.

[0012] Furthermore, a sealing block is provided on the outside of the mounting sleeve. The sealing block is fixedly connected to the top of the mounting base. Two insertion holes are opened on the top of the sealing block, and limiting members are provided on both sides of the sealing block.

[0013] Furthermore, at least one positioning groove is provided on the side wall of the telescopic rod, and the limiting member passes through the side wall of the sealing block and engages with the positioning groove to fix the telescopic position of the telescopic rod.

[0014] Furthermore, a retaining ring is fixedly connected to the top of the lead wire, and telescopic rods are fixedly connected to the bottom of both ends of the retaining ring. The bottom of the telescopic rods is inserted into the socket to keep the lead wire vertical.

[0015] Furthermore, the inner wall of the fixing ring is provided with an elastic buffer layer, which is in contact with the outer wall of the detection probe to absorb vibration stress.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention, through the action of the buffer sleeve and the limiting ring, ensures that the high-frequency vibration of the air conditioner fan and compressor is transmitted to the root of the lead wire. The vibration energy is absorbed by the elastic deformation of the buffer sleeve itself, dispersing the vibration stress throughout the buffer sleeve rather than concentrating it at the connection end between the lead wire and the mounting base. This significantly reduces fatigue damage to the core wire at the root of the lead wire, extends the service life of the lead wire, and, through the limiting ring and the moving structure, solves the problem of vibration or tensile damage at the root of the lead wire while also preventing excessive deformation of the buffer sleeve, solving the problem of buffer function attenuation. This ensures long-term stable protection of the root of the lead wire and maintains the accuracy of signal transmission.

[0017] 2. The present invention uses a sealing block to keep the connection between the mounting sleeve and the mounting base sealed, preventing the insulation layer at the root of the lead wire from absorbing water and softening, and preventing short circuits in the wire core. Furthermore, the fixed ring and the telescopic rod keep the telescopic rod in a vertical state, preventing the lead wire from tilting due to vibration or installation pulling, and reducing bending stress concentration at the connection end. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a structural diagram of the lead wire, mounting base, and retaining ring according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the mounting sleeve and mounting base according to an embodiment of the present invention; Figure 4 This is the present invention. Figure 3 Enlarged view of point A; Figure 5 This is a structural diagram of the protective component according to an embodiment of the present invention; Figure 6 This is a structural diagram of the movable structure and support components according to an embodiment of the present invention; Figure 7 This is the present invention. Figure 6 Enlarged view of point B; Figure 8 This is a structural diagram of the sealing block and limiting member according to an embodiment of the present invention.

[0019] In the diagram: 1. Mounting base; 2. Lead wire; 3. Detection probe; 4. Mounting sleeve; 5. Buffer sleeve; 6. Mounting plate; 7. Limiting ring; 8. Moving ring; 9. First rack; 10. Second rack; 11. Gear; 12. Second spring; 13. Annular protrusion; 14. Moving block; 15. First spring; 16. Telescopic support rod; 17. Positioning rod; 18. Third spring; 19. Fixing ring; 20. Telescopic rod; 21. Placement groove; 22. Sealing block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0021] This invention provides an air conditioner NTC temperature sensor, such as... Figures 1 to 4 As shown, the device includes a mounting base 1, a lead wire 2, a detection probe 3, and a protective assembly. The detection probe 3 is located at the bottom of the mounting base 1. The detection probe 3 contains an NTC ceramic chip for detecting temperature changes and acquiring temperature data. One end of the lead wire 2 passes through the mounting base 1 and is electrically connected to the pins of the NTC chip; the other end extends to the outside of the mounting base 1 for signal transmission. The protective assembly is located at the connection point between the mounting base 1 and the lead wire 2. The protective assembly includes a mounting sleeve 4, a buffer sleeve 5, a mounting plate 6, and a limiting mechanism. The mounting sleeve 4 is fixedly connected to the top of the mounting base 1, and the lead wire 2 is located within the mounting sleeve 4. In the middle, a buffer sleeve 5 is used to protect the lead wire 2. The buffer sleeve 5 is located at the connection end between the lead wire 2 and the mounting base 1 and is used to buffer the vibration force received by the lead wire 2 and the mounting base 1. The bottom of the buffer sleeve 5 is fixedly connected to the mounting plate 6, which is fixedly connected to the placement groove 21 at the top of the mounting base 1. A limiting mechanism is set on the mounting plate 6 and the buffer sleeve 5 to limit the buffer sleeve 5. The mounting sleeve 4 is located at the top of the placement groove 21. A support component is also set on the mounting plate 6 and the moving ring 8. The support component and the moving structure are arranged in a cross shape at the top of the mounting plate 6 to support and limit the buffer sleeve 5.

[0022] The NTC detection probe 3 at the bottom of the mounting base 1 directly contacts the air conditioner being tested. The NTC ceramic chip built into the detection probe 3 absorbs or releases heat from the tested object. One end of the lead wire 2 passes through the mounting base 1 and is electrically connected to the pin of the NTC chip, transmitting the resistance signal to the air conditioner's main control board. The main control board calculates the actual temperature by recognizing the resistance change, and then controls the air conditioner's cooling, heating, defrosting, and other programs. The mounting sleeve 4 is fixed to the top of the mounting base 1, wrapping the internal buffer sleeve 5, limiting mechanism, and support components to form external protection. This prevents condensate, oil, and dust inside the air conditioner from directly contacting the internal protective components, avoiding wear and corrosion of the buffer sleeve 5. It also limits the installation space of the internal components, preventing component displacement and interference during vibration, and forms radial constraint on the lead wire 2 to prevent excessive swinging of the lead wire 2.

[0023] The cross-shaped support components and moving structure ensure that the support force evenly covers the periphery of the buffer sleeve 5, avoiding wear or displacement of the buffer sleeve 5 caused by uneven local force. When the air conditioner fan or compressor generates high-frequency vibration, the vibration energy is transmitted to the connection end through the mounting base 1. The buffer sleeve 5 responds to the vibration first, undergoing elastic deformation along the axial direction to absorb part of the vibration energy. The buffer sleeve 5 drives the moving ring 8 in the middle to move synchronously. The moving ring 8 causes the support components and moving structure to move, absorbing the remaining vibration energy. The moving structure guides the moving ring 8 to move along the axial direction, preventing the buffer sleeve 5 from tilting and preventing excessive vibration amplitude. The top of the buffer sleeve 5 touches the limiting ring 7, which restricts its continued deformation and prevents the buffer sleeve 5 from failing. When the vibration energy is effectively absorbed and constrained, and the welding point and sealing layer remain intact, the lead wire 2 is in a stable vertical state, and the temperature signal is transmitted without distortion, thereby improving the service life of the lead wire 2.

[0024] like Figures 4 to 6 As shown, the buffer sleeve 5, the mounting plate 6 and the limiting mechanism are all located inside the mounting sleeve 4. The top end of the buffer sleeve 5 is located inside the bottom end of the limiting ring 7. The buffer sleeve 5 is spiral-shaped and made of silicone rubber. The inner wall of the buffer sleeve 5 is provided with axial anti-slip texture to fit tightly with the lead wire 2 and increase friction.

[0025] The mounting plate 6 facilitates the installation of the buffer sleeve 5 and the moving structure, ensuring that the buffer sleeve 5 deforms only along the axial direction. When the buffer sleeve 5 absorbs vibration or tensile force, the mounting plate 6 transmits part of the force to the entire mounting base 1, rather than concentrating it locally at the connection end, further dispersing the stress and providing a stable installation reference for the support assembly, thus ensuring the positioning accuracy of the support assembly.

[0026] When the air conditioner fan and compressor generate high-frequency vibrations, the vibration energy is transmitted to the connection end. The buffer sleeve 5 absorbs the vibration energy through the elastic deformation of its own spiral structure, dispersing the vibration stress concentrated at the root of the lead wire 2 to the entire buffer sleeve, thus avoiding stress concentration that could lead wire 2 to fatigue fracture. If the lead wire 2 is accidentally pulled during installation or wiring, the buffer sleeve 5 will first undergo elastic stretching to offset part of the pulling force, preventing the pulling force from being directly transmitted to the welding point between the lead wire 2 and the detection probe 3, thus preventing the welding point from falling off or the sealant layer from cracking.

[0027] like Figures 4 to 6 As shown, the limiting mechanism includes a limiting ring 7, a moving ring 8, and a moving structure. The limiting ring 7 is located at the top of the buffer sleeve 5 and is used to limit the position of the buffer sleeve 5. The moving ring 8 is fixedly connected to the middle of the buffer sleeve 5. The moving structure is located between the limiting ring 7 and the mounting plate 6 and is symmetrically arranged with respect to the center of the moving ring 8.

[0028] The movable structure includes a first rack 9, a second rack 10, a gear 11, a rotating rod, a fixed frame, and a second spring 12. The first rack 9 is fixedly connected to the bottom of the movable ring 8. The gear 11 is meshed on one side of the first rack 9. The rotating rod is fixedly connected to the middle of the gear 11. The fixed frame is rotatably connected to both ends of the rotating rod. The bottom of the fixed frame is fixedly connected to the top of the mounting plate 6. The second rack 10 is meshed on one side of the gear 11. The top of the second rack 10 is fixedly connected to the bottom of the limiting ring 7. The bottom of both the first rack 9 and the second rack 10 are fixedly connected to the second spring 12. The bottom of the second spring 12 is fixedly connected to the top of the mounting plate 6.

[0029] The limiting ring 7 has an annular protrusion 13 in the middle. The limiting ring 7 is made of silicone. The annular protrusion 13 is on the outside of the buffer sleeve 5. The outer wall of the buffer sleeve 5 and the annular protrusion 13 form a gap fit, which is used to absorb stress by elastic deformation of the buffer sleeve 5 when it is pulled.

[0030] The annular protrusion 13 forms a limit with the buffer sleeve 5, restricting the tensile displacement of the lead wire 2. When the buffer sleeve 5 is deformed by vibration or tension, the moving ring 8 moves axially synchronously with the buffer sleeve 5. The moving structure guides the moving ring 8 to move along a preset trajectory, preventing the buffer sleeve 5 from tilting. When the buffer sleeve 5 is stretched to the bottom of the limiting ring 7, the limiting ring 7 blocks the moving ring 8 from continuing to move, preventing the buffer sleeve 5 from undergoing plastic deformation due to excessive stretching or compression, and maintaining its elastic recovery ability. When the buffer sleeve 5 is stretched upward by vibration or tension, the moving ring 8 moves with the buffer sleeve 5. Synchronously displace upwards; when the buffer sleeve 5 is compressed downwards, the moving ring 8 moves downwards synchronously with the buffer sleeve 5, and is fixed to the mounting plate 6 by the rotating rod and the fixed frame, providing stable support for the gear 11. When the moving ring 8 moves, it drives the first rack 9 to move up or down and the second rack 10 to rotate, so that the gear 11 drives the rotating rod to rotate along the fixed frame, causing the second spring 12 on the corresponding side to be stretched or compressed, generating an elastic restoring force opposite to the direction of movement of the first rack 9 or the second rack 10, which helps to absorb vibration energy and further limits the buffer sleeve 5.

[0031] like Figures 6 to 8 As shown, the support assembly includes a movable block 14, a first spring 15, and a telescopic support rod 16. The movable block 14 is provided on the side of the mounting plate 6 near the movable structure. The movable block 14 is connected to the mounting plate 6 by the first spring 15. The top of the mounting base 1 has a placement groove 21. The movable block 14 is slidably connected to the bottom inner wall of the placement groove 21. The top of the movable block 14 is hinged to the movable ring 8 and the telescopic support rod 16 is provided. The telescopic support rod 16 is arranged in a V-shape between the buffer sleeves 5. A sealing block 22 is provided on the outside of the mounting sleeve 4. The sealing block 22 is fixedly connected to the top of the mounting base 1. The top of the sealing block 22 has two insertion holes, and the sealing block 22 has limiting members on both sides.

[0032] The limiting components include a positioning rod 17 and a third spring 18. The positioning rod 17 is fixedly connected to the inside of the sealing block 22 through the third spring 18. The number of positioning rods 17 and third springs 18 is the same as that of telescopic support rods 16.

[0033] When the sensor is operating in a steady state without significant vibration, the bottom of the telescopic support rod 16 opens in a V-shape, with its top hinged to the moving ring 8 and its bottom connected to the moving block 14, forming two symmetrical support diagonal rods that constrain the position of the buffer sleeve 5 and the lead wire 2. When the air conditioner fan or compressor vibrates, the buffer sleeve 5 deforms axially, causing the moving ring 8 to move synchronously. The telescopic support rod 16 deflects, causing the moving block 14 to slide, which compresses the first spring 15 and assists the buffer sleeve 5 in absorbing vibration stress. When the buffer sleeve 5 is compressed downwards, the moving ring 8 moves downwards, the opening angle of the telescopic support rod 16 increases, the moving block 14 slides away from the center, and the first spring 15 stretches, thus achieving elastic buffering and ensuring that both axial bidirectional deformations can be effectively absorbed. The positioning rod 17 and the third spring 18 are connected to the telescopic rod 20, so that the fixing ring 19 and the telescopic rod 20 can limit the two sides of the lead wire 2, so that the top of the lead wire 2 remains stable, and the protective component, the connection end of the lead wire 2 and the mounting base 1 are protected from external water vapor and oil stains by the protective block 22.

[0034] like Figures 2 to 8 As shown, at least one positioning groove is provided on the side wall of the telescopic rod 20. The limiting member passes through the side wall of the sealing block 22 and engages with the positioning groove to fix the telescopic position of the telescopic rod 20. A fixing ring 19 is fixedly connected to the top of the lead wire 2. The telescopic rod 20 is fixedly connected to the bottom of both ends of the fixing ring 19. The bottom of the telescopic rod 20 is inserted into the insertion hole to keep the lead wire 2 vertical. An elastic buffer layer is provided on the inner wall of the fixing ring 19. The elastic buffer layer is in contact with the outer wall of the detection probe 3 to absorb vibration stress. At the same time, the two telescopic rods 20 are fixed to form a symmetrical support structure, which constrains the lead wire 2 to the center of the fixing ring 19.

[0035] Because the retaining ring 19 is fixed to the top of the lead wire 2, and its inner wall is tightly fitted to the sheath of the lead wire 2, and two telescopic rods 20 are symmetrically distributed at the bottom of both ends of the retaining ring 19 to form a support structure, the lead wire 2 always remains perpendicular to the central axis of the retaining ring 19, avoiding tilting due to vibration or installation tension. The elastic buffer layer on the inner wall of the retaining ring 19 is fitted to the outer wall of the detection probe 3. When the air conditioner vibrates, the vibration energy is transmitted to the elastic buffer layer through the detection probe 3. The buffer layer absorbs part of the vibration energy through its own elastic deformation, preventing the vibration from being directly transmitted to the top of the lead wire 2, reducing stress accumulation at the root of the lead wire 2, and reducing the risk of fatigue fracture of the wire core. The flexibility of the elastic buffer layer can adapt to the thermal expansion and contraction of the detection probe 3 caused by temperature changes, avoiding damage to the detection probe 3 caused by rigid contact, while ensuring the fit between the retaining ring 19 and the probe, maintaining vertical positioning accuracy.

[0036] The bottom of the telescopic rod 20 passes through the insertion hole of the sealing block 22. The inner wall of the insertion hole and the outer wall of the telescopic rod 20 are in clearance fit, which forms a radial constraint on the telescopic rod 20 to prevent it from swinging radially and ensure that the telescopic rod 20 always remains vertical. Since the telescopic rod 20 can extend and retract axially, during installation, the height of the fixing ring 19 is adjusted by stretching or compressing the telescopic rod 20 so that the length of the lead wire 2 matches the relative position of the mounting base 1 and the detection probe 3, which improves the installation flexibility and adapts to different installation space requirements. When it is necessary to adjust the length of the telescopic rod 20, the positioning rod 17 is pressed against the outside of the sealing block 22 to overcome the preload of the third spring 18.

[0037] Working principle of this invention: Reference Figures 1 to 8 As shown, in use, the buffer sleeve 5 is installed on the connection end between the lead wire 2 and the mounting base 1 via the mounting plate 6, and the limiting mechanism is installed on the mounting plate 6 and the buffer sleeve 5 to limit the buffer sleeve 5. Then, the mounting sleeve 4 and the sealing block 22 are installed to keep the connection between the lead wire 2 and the mounting base 1 sealed. The length of the telescopic rod 20 is adjusted according to the length of the lead wire 2, and the fixing ring 19 is fixed on the top of the lead wire 2. Then, the positioning rod 17 is moved away from the sealing block 22, which drives the third spring 18 to stretch, so that the positioning rod 17 is disengaged from the positioning groove. After adjusting the length of the telescopic rod 20, the telescopic rod 20 is inserted into the insertion hole. The positioning rod 17 is released, and the third spring 18 is reset to push the positioning rod 17 to re-embed into the corresponding positioning groove, and the telescopic rod 20 is fixed again to prevent it from swinging radially. Under the action of the telescopic rod 20, the lead wire 2 is kept in a vertical state.

[0038] When the air conditioner fan or compressor generates high-frequency vibration, the vibration energy is transmitted to the connection end through the mounting base 1. The buffer sleeve 5 responds to the vibration first, undergoing elastic deformation along the axial direction to absorb part of the vibration energy. The buffer sleeve 5 drives the middle moving ring 8 to move synchronously. The moving ring 8 drives the first rack 9 to move up or down, causing the gear 11 to drive the rotating rod to rotate along the fixed frame. This causes the second rack 10 to move up or down synchronously with the gear 11. While driving the limiting ring 7 to move up or down, the top of the buffer sleeve 5 gradually approaches the bottom of the limiting ring 7. The limiting ring 7, through the second rack 10, gear 11, and first rack 9, restrains the continued displacement of the moving ring 8, ultimately preventing the buffer sleeve 5 from being stretched further, thus avoiding plastic deformation or breakage. Part of the vibration energy is absorbed by the elastic deformation of the buffer sleeve 5, and the other part is transmitted to the second spring 12 through the first rack 9, gear 11, and second rack 10, causing the stretching or compression deformation of the second spring 12 to further absorb the vibration energy.

[0039] When the moving ring 8 moves up or down, it causes the telescopic support rod 16 to deflect, causing the moving block 14 to slide along the bottom of the placement groove 21 toward the center or away from the center, causing the first spring 15 to stretch or compress, assisting the buffer sleeve 5 in absorbing vibration stress, thereby improving the buffering effect of the buffer sleeve 5 and increasing the service life of the lead wire 2.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. An air conditioner NTC temperature sensor, characterized in that, include: Mounting base (1), the bottom of which is provided with a detection probe (3) for detecting temperature changes; The lead wire (2) is connected to the detection probe (3) through the mounting base (1) for transmitting signals; A protective assembly is provided at the connection between the mounting base (1) and the lead wire (2). The protective assembly includes a mounting sleeve (4), a buffer sleeve (5), a mounting plate (6), and a limiting mechanism. The mounting sleeve (4) is provided at the top of the mounting base (1). The lead wire (2) is located in the middle of the mounting sleeve (4) and is used to protect the lead wire (2). The buffer sleeve (5) is located at the connection end between the lead wire (2) and the mounting base (1) and is used to buffer the vibration force received by the lead wire (2) and the mounting base (1). The buffer sleeve (5) is connected to the top of the mounting base (1) through the mounting plate (6). The limiting mechanism is provided on the mounting plate (6) and the buffer sleeve (5) and is used to limit the buffer sleeve (5). The buffer sleeve (5), mounting plate (6) and limiting mechanism are all located inside the mounting sleeve (4). The top end of the buffer sleeve (5) is located inside the bottom end of the limiting ring (7). The material of the buffer sleeve (5) is silicone rubber. The inner wall of the buffer sleeve (5) is provided with axial anti-slip texture to fit tightly with the lead wire (2) and increase friction. The limiting mechanism includes a limiting ring (7), a moving ring (8), and a moving structure. The limiting ring (7) is located at the top of the buffer sleeve (5) and is used to limit the position of the buffer sleeve (5). The moving ring (8) is fixedly connected to the middle of the buffer sleeve (5). The moving structure is located between the limiting ring (7) and the mounting plate (6). The moving structure is symmetrically arranged with respect to the center of the moving ring (8). The limiting ring (7) is provided with an annular protrusion (13) in the middle. The limiting ring (7) is made of silicone. The annular protrusion (13) is on the outside of the buffer sleeve (5). The outer wall of the buffer sleeve (5) and the annular protrusion form a gap fit, which is used to absorb stress by elastic deformation of the buffer sleeve (5) when it is pulled. The mounting sleeve (4) is located at the top of the placement groove (21). The mounting plate (6) and the moving ring (8) are also provided with support components. The support components and the moving structure are located at the top of the mounting plate (6) in a cross arrangement to support and limit the buffer sleeve (5). The support components include: The mounting plate (6) is provided with a movable block (14), a first spring (15) and a telescopic support rod (16). The movable block (14) is provided on the side of the mounting plate (6) near the movable structure. The movable block (14) is connected to the mounting plate (6) by the first spring (15). The mounting base (1) has a placement groove (21) at the top. The movable block (14) is slidably connected to the inner wall of the bottom of the placement groove (21). The top of the movable block (14) is hinged to the movable ring (8) and the telescopic support rod (16) is provided. The telescopic support rod (16) is located between the buffer sleeve (5) in a figure-eight arrangement.

2. The air conditioner NTC temperature sensor according to claim 1, characterized in that: A sealing block (22) is provided on the outside of the mounting sleeve (4). The sealing block (22) is fixedly connected to the top of the mounting base (1). Two insertion holes are opened on the top of the sealing block (22). Limiting members are provided on both sides of the sealing block (22).

3. The air conditioner NTC temperature sensor according to claim 2, characterized in that: The top end of the lead wire (2) is fixedly connected to a fixing ring (19), and the bottom ends of the fixing ring (19) are fixedly connected to telescopic rods (20). The bottom of the telescopic rods (20) is inserted into the socket to keep the lead wire (2) vertical.

4. The air conditioner NTC temperature sensor according to claim 3, characterized in that: At least one positioning groove is provided on the side wall of the telescopic rod (20). The limiting member passes through the side wall of the sealing block (22) and engages with the positioning groove to fix the telescopic position of the telescopic rod (20).

5. The air conditioner NTC temperature sensor according to claim 4, characterized in that: The inner wall of the fixed ring (19) is provided with an elastic buffer layer, which is attached to the outer wall of the detection probe (3) to absorb vibration stress.

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