Temperature sensor with waterproof function

Abstract

The application relates to the technical field of intelligent temperature sensors, in particular to a temperature sensor with a waterproof function, which comprises an intelligent sensor outer shell body, one side of the intelligent sensor outer shell body is connected with a transmission lead, and a connecting seat is fixed at the end, away from the intelligent sensor outer shell body, of the transmission lead; the quick-release balance assembly can realize stable air pressure balance between the inner cavity of the waterproof cover and the atmosphere, can eliminate the condensation generation in the sensor under the temperature alternating environment from the source, can avoid the circuit short circuit, temperature measurement signal drift distortion and other faults caused by the condensation, can greatly improve the operation stability and detection precision of the temperature sensor, can always maintain the waterproof effect of the intelligent temperature sensor by cooperating with the multilayer sealing structure, can realize tool-free quick replacement of the waterproof and breathable film without sacrificing the original waterproof performance, can prolong the overall service life of the intelligent temperature sensor without overall scrapping of the sensor, and can improve long-term use reliability.

Description

Technical Field

[0001] This invention relates to the field of intelligent temperature sensor technology, specifically to a temperature sensor with waterproof function. Background Technology

[0002] Intelligent temperature sensors are core temperature measuring devices in industrial automation, environmental monitoring, and intelligent equipment. Mainstream types include platinum resistance thermometers, thermocouples, and NTC thermistors. Their working principle relies on the thermophysical properties of the materials themselves to convert the temperature signal of the measured medium into detectable electrical signals such as resistance and voltage, thus achieving temperature acquisition and transmission. To adapt to harsh working conditions such as humidity, spraying, and underwater environments, existing waterproof temperature sensors generally adopt a structure design with an external waterproof cover. Typically, stainless steel is used as the main body of the waterproof cover, completely encapsulating the sensor probe and internal circuitry. Simultaneously, epoxy resin is used to seal the lead wire exit points, enabling the probe to achieve an overall IP67 or IP68 protection rating. This prevents external liquid water, oil, and dust from directly intruding into the sensor. This structure is a common technical solution for waterproof protection of temperature sensors in the industry and is widely used in water conservancy, chemical, HVAC, and many other scenarios.

[0003] Existing intelligent temperature sensors with a fully enclosed external waterproof cover, while preventing the intrusion of external liquid water, suffer from unavoidable technical drawbacks. The fully enclosed structure creates a sealed cavity. During actual operation, a temperature difference easily arises between the measured medium and the sensor's internal environment. The air and trace amounts of water vapor remaining inside the cavity reach their dew point temperature under alternating temperature conditions, causing condensation on the temperature sensing element, solder joints, and lead surfaces—a phenomenon known as condensation. Accumulated condensation can directly lead to internal circuit short circuits and temperature signal drift distortion, severely impacting the sensor's operational stability. Simultaneously, the internal and external pressure differences generated by thermal cycling continuously affect the sealed structure, accelerating the aging and cracking of the potting compound, further exacerbating internal condensation and failure risks. This problem has become a common industry challenge hindering the long-term reliable operation of waterproof temperature sensors. Summary of the Invention

[0004] The purpose of this invention is to provide a waterproof temperature sensor to solve the problem mentioned in the background art of existing intelligent temperature sensors with a fully enclosed structure of an external waterproof cover. These sensors form a sealed cavity inside, and temperature fluctuations can easily cause the air and trace amounts of water vapor inside the cavity to reach the dew point, forming condensation on the temperature sensing element, solder joints, and lead wire surfaces. This can lead to short circuits, signal drift and distortion, and seriously affect the stability of the sensor.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a waterproof temperature sensor, comprising a smart sensor housing, a transmission wire connected to one side of the smart sensor housing, a connector fixed to the end of the transmission wire away from the smart sensor housing, a temperature probe fixed to the middle of the end of the connector away from the transmission wire, a waterproof cover covering the temperature probe, a through hole formed inside one side of the waterproof cover, a vertical placement groove formed inside the side of the waterproof cover near the through hole, a protective self-cleaning component disposed inside the through hole, and a quick-release balancing component disposed inside the placement groove; the quick-release balancing component includes a limiting block and a waterproof and breathable membrane, the limiting block being slidably and sealingly inserted into the placement groove, and the waterproof and breathable membrane being disposed inside the side of the placement groove near the through hole.

[0006] Furthermore, a mounting base is fixedly installed on one side of the smart sensor housing, and a display module is embedded inside the side of the smart sensor housing away from the mounting base. A control button is installed at the bottom of the display module, and several friction blocks are fixedly arranged around the outside of the connecting base.

[0007] Furthermore, a sealing bottom frame is fixedly installed on one side of the bottom end of the limiting plug, the waterproof and breathable membrane is adhered to one side of the sealing bottom frame, and a sealing pressure frame is pressed onto the outside of the side of the waterproof and breathable membrane away from the sealing bottom frame.

[0008] Furthermore, a sealing strip is fixedly fixed around the outer side of the sealing frame away from the waterproof and breathable membrane, and a fixing seat is symmetrically fixed in the middle of the side of the sealing frame near the limiting plug. A rotating rod is fixedly fixed through the middle of the fixing seat, and rotating seats are rotatably connected to both ends of the rotating rod. One end of the rotating seat is fixedly installed on the outer side of the limiting plug.

[0009] Furthermore, a first sealing ring is embedded at one edge of the connector near the waterproof cover, and a second sealing ring is embedded at one edge of the waterproof cover near the first sealing ring. A threaded groove is formed on the inner wall of the top of the waterproof cover, and a hollow threaded post is fitted on the outer side of the top of the temperature probe. The top of the hollow threaded post is fixedly installed on the outer side of the bottom of the connector, and the hollow threaded post and the waterproof cover are connected by threads.

[0010] Furthermore, an auxiliary groove is provided through the interior of the limiting insert near the top, and a compression spring is symmetrically fixedly installed at the bottom end of the placement groove, with the top end of the compression spring abutting against the bottom end of the sealing base frame.

[0011] Furthermore, the protective self-cleaning component includes several rigid steel wires and a second magnet block. The several rigid steel wires are vertically fixed inside the through hole at equal intervals, and the second magnet block is disposed on one side of the several rigid steel wires.

[0012] Furthermore, a first magnet block is fixedly installed on the side of the bottom of the sealed bottom frame near the second magnet block. The adjacent surfaces of the first magnet block and the second magnet block are arranged with opposite poles. A collar is slidably sleeved on the outside of several of the rigid steel wires.

[0013] Furthermore, a connecting block is fixed between two adjacent collars, and a dredging block is fixed in the middle of the connecting block.

[0014] Furthermore, a connecting post is fixedly installed on the side of the second magnet block near the connecting block, and the end of the connecting post away from the second magnet block is fixedly installed on the outside of the connecting block.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The quick-release balancing assembly of this invention can achieve stable air pressure balance between the internal cavity of the waterproof cover and the external atmosphere, fundamentally eliminating condensation inside the sensor under alternating temperature conditions. This avoids faults such as short circuits and temperature signal drift distortion caused by condensation, significantly improving the operational stability and detection accuracy of the temperature sensor. At the same time, the multi-layer sealing structure can always maintain the waterproof effect of the intelligent temperature sensor without sacrificing the original waterproof performance. It also enables tool-free quick replacement of the waterproof and breathable membrane, eliminating the need to scrap the entire sensor, effectively reducing usage and maintenance costs, extending the overall service life of the intelligent temperature sensor, and improving long-term reliability.

[0016] 2. The protective self-cleaning component of the present invention can construct a physical protective barrier through rigid steel wire, effectively blocking external sharp particles and debris from impacting and scratching the waterproof and breathable membrane, significantly extending the effective service life of the waterproof and breathable membrane. This component can simultaneously complete the automatic unblocking and cleaning of the through holes and the surface of the steel wire during the replacement of the waterproof and breathable membrane, avoiding the accumulation of debris that causes blockage of the breathable channel, ensuring the long-term stable and effective function of internal and external air pressure balance, reducing the frequency of manual periodic cleaning and maintenance, and further reducing the difficulty of later maintenance of the sensor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the waterproof cover and connecting seat of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a three-dimensional structural diagram of the waterproof cover and the limiting block of the present invention; Figure 5 This is a partial cross-sectional perspective view of the waterproof cover and connecting seat of the present invention. Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 This is a three-dimensional structural diagram of the limiting insert and the sealing bottom frame of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point C; Figure 9 This is a partial cross-sectional three-dimensional structural diagram of the sealing bottom frame and the waterproof and breathable membrane of the present invention; Figure 10 This is a partial top view of the limiting insert and the waterproof and breathable membrane of the present invention; Figure 11 This is a partial cross-sectional perspective view of the placement groove and sealing bottom frame of the present invention. Figure 12 For the present invention Figure 11 Enlarged structural diagram at point D; Figure 13 This is a three-dimensional structural diagram of the rigid steel wire and collar of the present invention.

[0018] In the attached diagram, the components represented by each number are as follows: 1. Smart sensor housing; 2. Mounting base; 3. Transmission wire; 4. Waterproof cover; 5. Connecting base; 6. Threaded groove; 7. Hollow threaded column; 8. Temperature probe; 9. First sealing ring; 10. Through hole; 11. Hard steel wire; 12. Placement groove; 13. Limiting block; 14. Sealing bottom frame; 15. Waterproof and breathable membrane; 16. Sealing pressure frame; 17. Sealing strip; 18. Rotating rod; 19. Rotating base; 20. Auxiliary groove; 21. Friction block; 22. Second sealing ring; 23. Compression spring; 24. First magnet block; 25. Collar; 26. Connecting block; 27. Unblocking block; 28. Second magnet block; 29. ​​Connecting column; 30. Display module; 31. Fixing base; 32. Control button. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1 - Figure 11A waterproof temperature sensor includes a smart sensor housing 1. A transmission wire 3 is connected to one side of the smart sensor housing 1. A connector 5 is fixed to the end of the transmission wire 3 away from the smart sensor housing 1. A temperature probe 8 is fixed to the middle of the end of the connector 5 away from the transmission wire 3. A waterproof cover 4 is provided on the outside of the temperature probe 8. A through hole 10 is provided through one side of the waterproof cover 4. A placement groove 12 is vertically provided on the side of the waterproof cover 4 near the through hole 10. A quick-release balancing assembly is provided inside the placement groove 12. The quick-release balancing assembly includes a limiting plug 13 and a waterproof and breathable membrane 15. The limiting plug 13 is slidably and sealingly inserted into the placement groove 12. The waterproof and breathable membrane 15 is provided inside the side of the placement groove 12 near the through hole 10.

[0021] A mounting base 2 is fixedly installed on one side of the smart sensor housing 1. A display module 30 is embedded inside the side of the smart sensor housing 1 away from the mounting base 2. A control button 32 is installed at the bottom of the display module 30. Several friction blocks 21 are fixedly arranged around the outside of the connecting base 5.

[0022] A sealing bottom frame 14 is fixedly installed on one side of the bottom end of the limiting plug 13. A waterproof and breathable membrane 15 is adhered to one side of the sealing bottom frame 14. A sealing pressure frame 16 is pressed onto the outside of the waterproof and breathable membrane 15 away from the sealing bottom frame 14.

[0023] A sealing strip 17 is fixed around the outer side of the sealing frame 16 away from the waterproof and breathable membrane 15. A fixing seat 31 is symmetrically fixed in the middle of the side of the sealing frame 16 near the limiting insert 13. A rotating rod 18 is fixed through the middle of the fixing seat 31. Both ends of the rotating rod 18 are rotatably connected to a rotating seat 19. One end of the rotating seat 19 is fixedly installed on the outer side of the limiting insert 13.

[0024] A first sealing ring 9 is embedded at one edge of the connector 5 near the waterproof cover 4, and a second sealing ring 22 is embedded at one edge of the waterproof cover 4 near the first sealing ring 9. A threaded groove 6 is opened on the inner wall of the top of the waterproof cover 4. A hollow threaded post 7 is fitted on the outside of the top of the temperature probe 8. The top of the hollow threaded post 7 is fixedly installed on the outside of the bottom of the connector 5. The hollow threaded post 7 and the waterproof cover 4 are connected by threads.

[0025] An auxiliary groove 20 is provided through the interior of the limiting insert 13 near the top. A compression spring 23 is symmetrically fixed at the bottom of the placement groove 12, and the top of the compression spring 23 abuts against the bottom of the sealing bottom frame 14.

[0026] In this embodiment, during use, the entire temperature sensor is first fixed at the desired temperature measurement position using the mounting base 2 on one side of the smart sensor housing 1, ensuring a stable installation. Then, the waterproof cover 4 is threadedly connected to the hollow threaded post 7 fitted onto the bottom of the connecting seat 5 via the threaded groove 6 on its inner top wall. During the connection process, the first sealing ring 9 embedded near the edge of the waterproof cover 4 on the connecting seat 5 tightly engages with the second sealing ring 22 embedded on the corresponding edge of the waterproof cover 4, forming a sealed structure. This effectively prevents external liquid water, dust, and oil from intruding into the interior of the waterproof cover 4, ensuring that the temperature probe 8 is in a sealed protective state. This avoids probe damage or signal abnormalities due to poor sealing, providing a fundamental guarantee for the accuracy of temperature detection.

[0027] The temperature probe 8 is placed in the medium being measured. Based on its own thermophysical properties, the temperature probe 8 converts the temperature signal of the medium being measured into detectable electrical signals such as resistance and voltage. These signals are transmitted to the inside of the intelligent sensor housing 1 through the transmission wire 3. After processing by the internal circuit, the temperature measurement data is displayed intuitively through the display module 30 embedded on the intelligent sensor housing 1. The operator can use the control button 32 below the display module 30 to turn the sensor on and off and adjust the temperature measurement parameters. Several friction blocks 21 are fixed around the outside of the connecting base 5 to increase the friction when holding it, making it easier for the operator to rotate the connecting base 5 and improving the ease of operation when installing and removing the waterproof cover 4.

[0028] During sensor operation, the quick-release balancing assembly effectively solves the common industry problem of condensation in existing fully enclosed waterproof temperature sensors. The waterproof and breathable membrane 15 is set on the side of the placement groove 12 near the through hole 10, and is firmly fixed by the cooperation of the sealing bottom frame 14 and the sealing pressure frame 16. The sealing strip 17 fixed around the outside of the sealing pressure frame 16 away from the waterproof and breathable membrane 15 fits tightly against the inner wall of the placement groove 12 and the wall of the through hole 10, ensuring the sealing of the installation point of the waterproof and breathable membrane 15 and ensuring the normal operation of the membrane. The waterproof and breathable membrane 15 has both waterproof and breathable properties. External liquid water cannot penetrate the membrane to enter the interior of the waterproof cover 4, which can effectively preserve the waterproof performance of the sensor. At the same time, it can connect the sealed cavity inside the waterproof cover 4 with the external atmosphere, achieving internal and external air pressure balance. This completely solves the problem in existing fully enclosed structures where air and trace amounts of water vapor in the cavity reach the dew point and form condensation when there is a temperature difference between the measured medium and the internal environment of the sensor. It also eliminates faults such as short circuits and temperature signal drift and distortion caused by condensation water accumulating on the temperature probe 8, solder joints and lead wire surfaces, significantly improving the working stability and long-term operational reliability of the sensor.

[0029] As the usage time increases, the waterproof and breathable membrane 15 will fail due to micropore blockage, material aging, fatigue damage, etc. At this time, the quick-release structure of the present invention can realize convenient replacement of the membrane without disassembling the entire sensor, which greatly reduces maintenance costs. During replacement, the operator holds the friction block 21 on the outside of the connecting seat 5, rotates the connecting seat 5, and separates the hollow threaded column 7 from the threaded groove 6 of the waterproof cover 4, thus disassembling the waterproof cover 4 from the connecting seat 5. After disassembly, the compression spring 23 symmetrically fixed at the bottom of the placement groove 12 loses pressure, automatically rebounds, and pushes the sealing bottom frame 14 to move upward. The sealing bottom frame 14 drives the limiting plug 13 to extend upward into the placement groove 12 in sync, so that the auxiliary groove 20 through the top of the limiting plug 13 is fully exposed. The operator can easily grasp the auxiliary groove 20 and remove the limiting plug 13 from the placement groove 12.

[0030] After removing the limiting insert 13, rotate the sealing pressure frame 16. The sealing pressure frame 16 rotates on the rotating seat 19 through the fixing seat 31 symmetrically fixed on one side, around the rotating rod 18 fixed in the middle of the fixing seat 31, and can open the sealing bottom frame 14. Take out the failed waterproof and breathable membrane 15 from the sealing bottom frame 14, and then stick the cut new waterproof and breathable membrane 15 to one side of the sealing bottom frame 14. Rotate the sealing pressure frame 16 in the opposite direction to press and fix the new waterproof and breathable membrane 15 between the sealing bottom frame 14 and the sealing pressure frame 16, to ensure the sealing of the membrane installation point after replacement and prevent water vapor from seeping in from the installation gap.

[0031] After the membrane body is replaced, the limiting insert 13 is reinserted into the placement groove 12. Then, the waterproof cover 4 and the connecting seat 5 are tightened through the threaded engagement of the hollow threaded post 7 and the threaded groove 6, so that the first sealing ring 9 and the second sealing ring 22 are tightly fitted again, completing the entire membrane body replacement process. The entire replacement process requires no special tools, is convenient and efficient, and solves the industry pain point that existing waterproof temperature sensor membranes must be scrapped after failure. It enables the reuse of the sensor body, which not only reduces the user's operating costs, but also quickly restores the sensor's anti-condensation and waterproof performance, ensuring the sensor's continuous and stable operation.

[0032] Example 2: Please refer to Figure 11 - Figure 13 This embodiment further illustrates Example 1, wherein a protective self-cleaning component is provided inside the through hole 10.

[0033] The protective self-cleaning component includes several rigid steel wires 11 and a second magnet block 28. The several rigid steel wires 11 are vertically fixed inside the through hole 10 at equal intervals, and the second magnet block 28 is located on one side of the several rigid steel wires 11.

[0034] A first magnet 24 is fixedly installed on the bottom end of the sealed bottom frame 14 near the side of the second magnet 28. The adjacent surfaces of the first magnet 24 and the second magnet 28 are set with opposite poles. A collar 25 is slidably sleeved on the outside of several rigid steel wires 11.

[0035] A connecting block 26 is fixed between two adjacent collars 25, and a drain block 27 is fixed in the middle of the connecting block 26.

[0036] A connecting post 29 is fixedly installed on the side of the second magnet block 28 near the connecting block 26, and the end of the connecting post 29 away from the second magnet block 28 is fixedly installed on the outside of the connecting block 26.

[0037] In this embodiment, the protective self-cleaning component and the quick-release balancing component work together. Firstly, they provide protection: several rigid steel wires 11 are vertically fixed at equal intervals inside the through-hole 10, forming a dense protective barrier. This effectively prevents impurities from the external environment from entering the placement groove 12 through the through-hole 10, avoiding direct impact and scratches to the waterproof and breathable membrane 15. This prevents the membrane from being punctured, scratched, or blocked by impurities, thus protecting the integrity and performance of the waterproof and breathable membrane 15, extending its service life, and solving the defects of existing ventilation channels lacking protection and membranes easily damaged by impurities. This ensures long-term stable operation of the sensor. Simultaneously, the evenly spaced rigid steel wires 11 do not obstruct the ventilation space of the through-hole 10, and do not affect the core functions of the waterproof and breathable membrane 15 in achieving internal and external air pressure balance and eliminating condensation. This ensures that protection and ventilation do not interfere with each other, balancing practicality and rationality.

[0038] Secondly, the protective self-cleaning component can automatically unclog the through hole 10 without additional manual operation. When the waterproof and breathable membrane 15 fails and needs to be replaced by disassembling the limiting plug 13 according to the procedure in Embodiment 1, as the limiting plug 13 moves upward, it will drive the sealing bottom frame 14 fixedly installed on one side of its bottom end to move upward simultaneously. The first magnet 24 fixed on the side of the sealing bottom frame 14 near the second magnet 28 will rise together with the sealing bottom frame 14. Since the adjacent surfaces of the first magnet 24 and the second magnet 28 are set with opposite poles, according to the principle of opposite poles attracting each other, when the first magnet 24 rises, it will generate an upward attraction force on the second magnet 28, driving the second magnet 28 to move upward simultaneously.

[0039] The second magnet 28 is fixedly connected to the connecting block 26 via a connecting post 29 fixed to its side near the connecting block 26. Therefore, when the second magnet 28 rises, it pulls the connecting block 26 upward through the connecting post 29. Both ends of the connecting block 26 are fixedly connected to the collars 25, and the collars 25 are slidably fitted onto the outside of the rigid steel wire 11. Therefore, when the connecting block 26 moves upward, it will drive all the collars 25 to slide upward synchronously along the length of the rigid steel wire 11. During the sliding of the collars 25, the unblocking block 27 fixed in the middle of the connecting block 26 will move accordingly, which can remove and scrape off the impurities attached between the rigid steel wires 11, completing automatic unblocking and preventing impurities from accumulating and clogging the through holes 10. This ensures that the through holes 10 are breathable, thereby ensuring the breathability efficiency of the waterproof and breathable membrane 15 and preventing the recurrence of condensation problems caused by the unbalanced internal and external air pressure due to the blockage of the through holes 10.

[0040] When the membrane replacement is completed, the limiting block 13 is reinserted into the placement slot 12 and pressed back to its original position. The sealing bottom frame 14 drives the first magnet block 24 to move downwards synchronously. The attraction force of the first magnet block 24 on the second magnet block 28 gradually weakens. Under its own gravity, the collar 25, connecting block 26, unblocking block 27 and the second magnet block 28 slide down and reset along the rigid steel wire 11. Automatic unblocking is performed again when the membrane is disassembled and replaced next time. The entire self-cleaning process does not require manual intervention and is linked with the quick membrane replacement action to achieve "unblocking when replacing the membrane". The operation is convenient and efficient.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waterproof temperature sensor, comprising a smart sensor housing (1), characterized in that: A transmission wire (3) is connected to one side of the smart sensor housing (1). A connector (5) is fixed to one end of the transmission wire (3) away from the smart sensor housing (1). A temperature probe (8) is fixed to the middle of one end of the connector (5) away from the transmission wire (3). A waterproof cover (4) is provided on the outside of the temperature probe (8). A through hole (10) is provided inside one side of the waterproof cover (4). A placement groove (12) is vertically provided inside the side of the waterproof cover (4) near the through hole (10). A protective self-cleaning component is provided inside the through hole (10). A quick-release balancing component is provided inside the placement groove (12). The quick-release balancing assembly includes a limiting plug (13) and a waterproof and breathable membrane (15). The limiting plug (13) is slidably and sealed inside the placement groove (12), and the waterproof and breathable membrane (15) is disposed inside the placement groove (12) on the side near the through hole (10).

2. A waterproof temperature sensor according to claim 1, characterized in that: A mounting base (2) is fixedly installed on one side of the smart sensor housing (1). A display module (30) is embedded inside the side of the smart sensor housing (1) away from the mounting base (2). A control button (32) is installed at the bottom of the display module (30). Several friction blocks (21) are fixed around the outside of the connecting base (5).

3. A waterproof temperature sensor according to claim 1, characterized in that: A sealing bottom frame (14) is fixedly installed on one side of the bottom end of the limiting plug (13). The waterproof and breathable membrane (15) is adhered to one side of the sealing bottom frame (14). A sealing pressure frame (16) is pressed onto the outside of the side of the waterproof and breathable membrane (15) away from the sealing bottom frame (14).

4. A waterproof temperature sensor according to claim 3, characterized in that: A sealing strip (17) is fixed around the outer side of the sealing frame (16) away from the waterproof and breathable membrane (15). A fixing seat (31) is symmetrically fixed in the middle of the side of the sealing frame (16) close to the limiting plug (13). A rotating rod (18) is fixed through the middle of the fixing seat (31). Both ends of the rotating rod (18) are rotatably connected to a rotating seat (19). One end of the rotating seat (19) is fixedly installed on the outer side of the limiting plug (13).

5. A waterproof temperature sensor according to claim 1, characterized in that: The connecting seat (5) is fitted with a first sealing ring (9) at one end edge near the waterproof cover (4), and the waterproof cover (4) is fitted with a second sealing ring (22) at one end edge near the first sealing ring (9). A threaded groove (6) is opened on the inner wall of the top of the waterproof cover (4). A hollow threaded column (7) is fitted on the outside of the top of the temperature probe (8). The top of the hollow threaded column (7) is fixedly installed on the outside of the bottom of the connecting seat (5). The hollow threaded column (7) and the waterproof cover (4) are connected by threads.

6. A waterproof temperature sensor according to claim 3, characterized in that: The limiting insert (13) has an auxiliary groove (20) through the inside near the top. A compression spring (23) is symmetrically fixed at the bottom of the placement groove (12). The top of the compression spring (23) abuts against the bottom of the sealing bottom frame (14).

7. A waterproof temperature sensor according to claim 3, characterized in that: The protective self-cleaning component includes several rigid steel wires (11) and a second magnet (28). The several rigid steel wires (11) are vertically fixed inside the through hole (10) at equal intervals, and the second magnet (28) is disposed on one side of the several rigid steel wires (11).

8. A waterproof temperature sensor according to claim 7, characterized in that: The first magnet block (24) is fixedly installed on the side of the bottom of the sealed bottom frame (14) near the second magnet block (28). The adjacent surfaces of the first magnet block (24) and the second magnet block (28) are set with opposite poles. A collar (25) is slidably sleeved on the outside of several hard steel wires (11).

9. A temperature sensor with waterproof function according to claim 8, characterized in that: A connecting block (26) is fixed between two adjacent collars (25), and a dredging block (27) is fixed in the middle of the connecting block (26).

10. A waterproof temperature sensor according to claim 9, characterized in that: A connecting post (29) is fixedly installed on the side of the second magnet block (28) near the connecting block (26), and the end of the connecting post (29) away from the second magnet block (28) is fixedly installed on the outside of the connecting block (26).

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