Composite sensor structure, waterproof and dustproof assembly and waterproof and dustproof method thereof

Abstract

The invention relates to the technical field of sensors, in particular to a composite sensor structure, a waterproof and dustproof assembly and a waterproof and dustproof method thereof.The waterproof and dustproof assembly comprises a mounting shell, the mounting shell is arranged at the top of a shell, a through hole is formed in the middle of the mounting shell, and a rotating shaft is rotationally arranged in the mounting shell; a through hole is formed in the outer shell, a soft filter screen is arranged in the mounting shell and wound on the outer sides of the two rotating shafts, a connecting pipe is arranged between the mounting shell and the outer shell and communicates with the through hole, the heat dissipation copper plate is located in the connecting pipe, and the top of the heat dissipation copper plate is arranged to be in an arc shape. When a detection value of the temperature sensor reaches a first threshold value, the fan blades rotate to generate wind power, auxiliary heat dissipation is carried out on the heat dissipation copper plate under the action of the wind power, and hot air is discharged from the air outlet groove, so that impurity removal and drying are carried out between the base and the PCB, and short circuit of pins is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a composite sensor structure, a waterproof and dustproof component and a waterproof and dustproof method thereof. Background Art

[0002] At present, there are many sensors on the market, but general sensors, when used in a humid environment, are very likely to cause a short circuit inside the device and then be damaged. The pins of the device are easily interfered by external debris, causing a short circuit in the sensor, which seriously affects the normal use of the device and reduces the use effect of the device.

[0003] The Chinese patent application number CN202410532074.3 is a nanoscale eddy current sensor with a waterproof and dustproof structure, including a column, a probe is fixed on the top of the column, and a groove plate is glued to the bottom of the column. The outer wall of the block is inserted into the inner wall of the groove through the glue connection of the sleeve column and the dustproof plate, so that the dustproof plate can block the debris and dust close to the probe surface, avoiding the pollution of the probe surface by external debris, thereby effectively improving the dustproof effect of the device on the probe. However, when the device is in use, when the equipment is abnormally hot, the connection of the device cannot be cut off in time, which can easily cause a fire.

[0004] A waterproof, corrosion-resistant and dust-proof magnetic angular displacement sensor with Chinese patent application number CN201910922001.4 includes a magnet, a printed circuit board assembly, a shaft, an upper sealing cover, a shell, and a lower sealing cover. The shaft is rotatably installed in the shell, and the top of the shaft passes through the upper sealing cover; a sealing cavity is opened in the upper part of the shell, and a sealing part is installed in the sealing cavity of the shell, and a bearing B matched with the shaft is installed in the lower part of the shell. However, when the device is used, the dust of the equipment cannot be cleaned, which may easily cause high temperature of the equipment and affect the use of the equipment.

[0005] At the same time, there is often a gap between the sensor and the PCB board, which is conducive to the heat dissipation of the sensor. If the sensor is used in a high-humidity and high-dust environment, dust is likely to accumulate between the sensor and the PCB board. In addition, due to the use of the gap in the sensor, there is a temperature change between the sensor and the PCB board, which makes it easy for water droplets to condense between the sensor and the PCB board, and easily cause the pins of the sensor body to short-circuit with each other, thereby damaging the sensor body. In addition, dust accumulated on the heat dissipation copper plate and heat dissipation fins will also affect the heat dissipation of the sensor. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a composite sensor structure, a waterproof and dustproof component and a waterproof and dustproof method thereof.

[0007] A composite sensor structure of the present invention comprises a shell, a base is arranged at the lower end of the shell, a sensor body is arranged inside the shell on the top of the base, pins are arranged at the lower end of the sensor body, the pins pass through the base, heat dissipation fins are arranged at the external side end of the shell, a heat dissipation copper plate is arranged at the top of the shell, and supporting feet are arranged at the side ends of the base, and mounting holes are arranged on the supporting feet.

[0008] The present invention also provides a waterproof and dustproof component of a composite sensor structure, comprising a mounting shell, wherein the mounting shell is arranged at the top of the outer shell, a through hole is arranged in the middle of the mounting shell, a rotating shaft is rotatably arranged in the mounting shell, a soft filter is arranged in the mounting shell, and the soft filter is wound around the outsides of two rotating shafts, a connecting pipe is arranged between the mounting shell and the outer shell, the connecting pipe is connected with the through hole, the heat dissipation copper plate is located in the connecting pipe, the top of the heat dissipation copper plate is arranged in an arc shape, and an air hole is arranged at the side end of the connecting pipe.

[0009] By arranging components such as a soft filter, a fan blade, a cleaning sleeve and an electromagnet, when the detection value of the temperature sensor reaches a first threshold value, the fan blade rotates to generate wind force, and under the action of the wind force, the heat dissipation copper plate is assisted in heat dissipation, and the hot air is discharged from the air outlet slot, thereby removing impurities and drying between the base and the PCB board to avoid short circuit of the pins. When the detection value of the temperature sensor reaches a second threshold value, the soft filter is moved to clean the soft filter, and the cleaning sleeve is moved on the fan blade to clean impurities on the fan blade, ensuring that the rotation of the fan blade generates stable wind force to ensure stable heat dissipation. When the detection value of the temperature sensor reaches a third threshold value, the rotation speed of the fan blade is accelerated, the flow rate of the gas discharged from the air outlet slot is increased, the limit rod is separated from the air outlet slot, and the scraper is used to cut off the pins with the assistance of the spring, thereby cutting off the power to the sensor body to avoid fire caused by abnormally high temperature of the sensor body.

[0010] Furthermore, an air duct is provided in the shell, the air hole is connected with the air duct, an air outlet groove is provided at the lower end of the base, the air outlet groove is connected with the air duct, two slide grooves are also provided at the lower end of the base, a slider is slidably provided in the slide groove, a spring is provided between the slider and the side wall of the slide groove, a scraper is provided at the lower end of the slider, a limiting rod is provided on the side of the slider away from the spring, the limiting rod is inserted into the air outlet groove, a slope is provided on one side of the limiting rod located at the air outlet groove, and a protrusion is provided on one side of the limiting rod in the air outlet groove.

[0011] Furthermore, a scraper is provided on the soft filter screen, and the scraper is made of elastic material. There are multiple scrapers on the soft filter screen, and the scrapers on the soft filter screen are evenly arranged.

[0012] Furthermore, a first motor is arranged in the mounting shell, and the first motor is arranged on the inner wall of the through hole of the mounting shell. A turntable is arranged at the output end of the first motor, and fan blades are arranged at the side end of the turntable. A cleaning sleeve is arranged on the fan blades, and the cleaning sleeve is magnetic. An electromagnet is also arranged in the mounting shell.

[0013] Furthermore, a second motor is arranged outside the mounting shell, an output end of the second motor is connected to the rotating shaft, and a temperature sensor is also arranged inside the shell, and the temperature sensor is arranged at a side end of the sensor body.

[0014] Furthermore, after the electromagnet is energized, the side of the electromagnet close to the cleaning sleeve is at level N, and the side of the cleaning sleeve close to the electromagnet is at level S.

[0015] The present invention also provides a waterproof and dustproof method for a waterproof and dustproof component, comprising the following steps:

[0016] Step 1: The temperature of the sensor body is detected with the assistance of the temperature sensor. When the detection value of the temperature sensor reaches the first threshold, the first motor is started to rotate the fan blades to generate wind force. Under the action of the wind force, the heat dissipation copper plate is assisted to dissipate the heat, and the air outlet groove discharges hot air to remove dust and dry the space between the base and the PCB board;

[0017] Step 2: As the detection value of the temperature sensor rises and reaches the second threshold, the system controls the soft filter to move in a circular motion. When the soft filter moves, the mounting shell and the scraper work together to clean the soft filter.

[0018] Step 3: After step 2 is completed, when the detection value of the temperature sensor continues to rise, the system controls the electromagnet to be energized, so that the cleaning sleeve moves on the fan blades under the action of magnetic force, thereby cleaning the fan blades to ensure that the fan blades rotate to generate stable wind force;

[0019] Step 4: After step 3 is completed, if the detection value of the temperature sensor still rises to the third threshold value, the system determines that the sensor body has a fault. At this time, the system controls the first motor to operate at maximum power, increasing the gas flow rate discharged from the air outlet groove, thereby increasing the force acting on the limit rod, causing the limit rod to separate from the air outlet groove, so that the scraper cuts off the pin under the action of the spring, and the sensor body is powered off to avoid fire caused by high temperature.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention is provided with a temperature sensor, a first motor, a fan blade, an air outlet slot and other components. When the detection value of the temperature sensor reaches a first threshold value, the first motor is started, and the fan blade rotates to generate wind force. Under the action of the wind force, the heat dissipation copper plate is assisted to dissipate heat, and the hot air is discharged from the air outlet slot, thereby removing impurities and drying between the base and the PCB board to avoid short circuit of the pins.

[0022] 2. The present invention is provided with components such as a temperature sensor, a soft filter, a scraper and a cleaning sleeve. When the detection value of the temperature sensor reaches a second threshold value, the soft filter is moved to clean the soft filter, and the cleaning sleeve is moved on the fan blade to clean the impurities on the fan blade, thereby ensuring that the rotation of the fan blade generates stable wind force to ensure stable heat dissipation.

[0023] 3. The present invention is provided with components such as a temperature sensor, a scraper, a spring and a limit rod. When the detection value of the temperature sensor reaches the third threshold value, the rotation speed of the fan blade is accelerated, so that the flow rate of the gas discharged from the air outlet groove is increased, the limit rod is separated from the air outlet groove, and the scraper is used with the assistance of the spring to cut off the pin, thereby cutting off the power to the sensor body to avoid fire caused by abnormally high temperature of the sensor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of another viewing angle of the present invention;

[0026] Figure 3 The present invention Figure 2 The structural diagram at A in the middle;

[0027] Figure 4 It is a structural schematic diagram of the mounting housing and the first motor and other components of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the fan blades and soft filter screen and other components of the present invention;

[0029] Figure 6 It is a schematic structural diagram of components such as the air outlet groove and the limit rod of the present invention.

[0030] Figure numerals: 1. shell; 2. base; 3. sensor body; 4. pin; 5. heat dissipation fin; 6. heat dissipation copper plate; 7. support foot; 8. mounting hole; 9. mounting shell; 901. through hole; 902. rotating shaft; 903. soft filter; 904. connecting pipe; 905. air hole; 906. air outlet groove; 907. slide groove; 908. slider; 909. spring; 910. scraper; 911. limit rod; 912. scraper; 913. first motor; 914. turntable; 915. fan blade; 916. cleaning sleeve; 917. electromagnet 917; 918. second motor. DETAILED DESCRIPTION

[0031] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0032] like Figure 1 to Figure 2 As shown, a composite sensor structure of the present invention comprises a shell 1, a base 2 is arranged at the lower end of the shell 1, a sensor body 3 is arranged at the top of the base 2 in the shell 1, a pin 4 is arranged at the lower end of the sensor body 3, the pin 4 passes through the base 2, a heat dissipation fin 5 is arranged at the outer side end of the shell 1, a heat dissipation copper plate 6 is arranged at the top of the shell 1, a support leg 7 is arranged at the side end of the base 2, and a mounting hole 8 is arranged on the support leg 7. The shell 1 is mainly used to protect the sensor body 3. When the PCB board on which the sensor is installed is hit, the shell 1 can prevent foreign objects from directly hitting the sensor body 3, thereby ensuring that the sensor body 3 It can operate normally. Screws are set in the mounting holes 8 on the legs 7, so that the sensor can be fixed on the PCB board. The pin 4 is used to electrically connect the sensor body 3 with the PCB board, so that the sensor body 3 is integrated into the circuit of the PCB board. The legs 7 can prevent the sensor from moving when it is hit, so that the pin 4 is disconnected to ensure the normal use of the sensor body 3. The sensor body 3 will generate heat when it is powered on. The heat dissipation fins 5 and the heat dissipation copper plate 6 can assist in the heat dissipation of the sensor body 3, so that the operation of the sensor body 3 is more stable.

[0033] During the use of the sensor, there is often a gap between the base 2 and the PCB board, which is beneficial to the heat dissipation of the sensor. If the sensor is used in a high-humidity and high-dust environment, dust is likely to accumulate between the base 2 and the PCB board. In addition, due to the use of the gap in the sensor, there is a temperature change between the base 2 and the PCB board, so that water droplets are easily condensed between the base 2 and the PCB board, which is easy to cause the pins 4 of the sensor body 3 to short-circuit each other, thereby damaging the sensor body 3. In addition, dust accumulated on the heat dissipation copper plate 6 and the heat dissipation fins 5 will also affect the heat dissipation of the sensor. Therefore, the following solutions are proposed:

[0034] like Figures 1 to 6 As shown, the waterproof and dustproof component of the composite sensor structure of the present invention includes a mounting shell 9, the mounting shell 9 is arranged on the top of the housing 1, a through hole 901 is arranged in the middle of the mounting shell 9, a rotating shaft 902 is rotatably arranged in the mounting shell 9, a soft filter 903 is arranged in the mounting shell 9, and the soft filter 903 is wound around the outside of the two rotating shafts 902, a connecting pipe 904 is arranged between the mounting shell 9 and the housing 1, and the connecting pipe 904 is connected to the through hole 901, a heat dissipation copper plate 6 is located in the connecting pipe 904, and the top of the heat dissipation copper plate 6 is arranged in an arc shape, and the connecting pipe 9 04 The side end is provided with an air hole 905, and external dust will not adhere to the heat dissipation copper plate 6 through the blocking of the soft filter 903, and the heat of the heat dissipation copper plate 6 can be discharged through the soft filter 903. When the soft filter 903 is blocked due to excessive dust, the rotating shaft 902 is rotated to make the soft filter 903 circulate. When the blocked soft filter 903 enters the installation shell 9, the installation shell 9 will scrape off the dust accumulated on the soft filter 903, thereby cleaning the soft filter 903 and ensuring its normal use.

[0035] A first motor 913 is arranged in the mounting shell 9, and the first motor 913 is arranged on the inner wall of the through hole 901 of the mounting shell 9. A turntable 914 is arranged at the output end of the first motor 913, and a fan blade 915 is arranged at the side end of the turntable 914. A cleaning sleeve 916 is arranged on the fan blade 915, and the cleaning sleeve 916 is magnetic. An electromagnet 917 is also arranged in the mounting shell 9. After the first motor 913 is started, the output end of the first motor 913 will drive the rotation of the turntable 914, and the rotation of the turntable 914 will drive the fan blade The rotation of 915 and the rotation of the fan blades 915 will generate downward wind force, and the wind force will pass through the soft filter 903 and act on the heat dissipation copper plate 6 to assist in heat dissipation, and the wind force will also enter the air hole 905. After the electromagnet 917 is energized, a magnetic attraction will be generated between the electromagnet 917 and the cleaning sleeve 916, so that the cleaning sleeve 916 moves away from the turntable 914, and the movement of the cleaning sleeve 916 can scrape off the impurities on the fan blades 915, ensuring that the rotation of the fan blades 915 generates stable wind force.

[0036] An air passage is arranged in the housing 1, and the air hole 905 is connected with the air passage. An air outlet groove 906 is arranged at the lower end of the base 2, and the air outlet groove 906 is connected with the air passage. Two slide grooves 907 are also arranged at the lower end of the base 2. A slider 908 is arranged to slide in the slide groove 907. A spring 909 is arranged between the slider 908 and the side wall of the slide groove 907. A scraper 910 is arranged at the lower end of the slider 908. A limit rod 911 is arranged on the side of the slider 908 away from the spring 909. The limit rod 911 is inserted into the air outlet groove 906. The limit rod 911 is arranged with an inclined surface on one side of the air outlet groove 906. The limit rod 911 is arranged with a bump on one side of the air outlet groove 906, and the wind enters the air hole 905. After that, the wind force in the air hole 905 will enter the air channel in the shell 1, and then the wind force in the air channel will be discharged through the air outlet groove 906. The wind force discharged from the air outlet groove 906 will clean the dust between the base 2 and the PCB board. At the same time, when the wind force discharged from the air outlet groove 906 increases and exceeds the threshold, the protrusion can no longer limit the limit rod 911. The wind force will act on the limit rod 911 to move the limit rod 911 in the direction of the pin 4. After the limit rod 911 is separated from the base 2, due to the action of the spring 909, the slider 908 will move quickly in the slide groove 907, so that the scraper 910 will cut off the pin 4, thereby completing the disconnection of the sensor body 3 and the PCB board.

[0037] A scraper 912 is provided on the soft filter 903. The scraper 912 is made of elastic material. There are multiple scrapers 912 on the soft filter 903. The scrapers 912 on the soft filter 903 are evenly arranged. As the soft filter 903 moves, the scraper 912 on the soft filter 903 extends out from the mounting shell 9. The scraper 912 will return to a vertical state due to the elasticity. At this time, the scraper 912 will vibrate with the soft filter 903, and as the scraper 912 moves, impurities at the bottom end of the mounting shell 9 will be scraped to one side by the scraper 912 to ensure the smoothness of the through hole 901.

[0038] A second motor 918 is arranged outside the mounting shell 9, and the output end of the second motor 918 is connected to the rotating shaft 902. A temperature sensor is also arranged inside the outer shell 1, and the temperature sensor is arranged on the side end of the sensor body 3. After the second motor 918 is started, the output end of the second motor 918 will drive the rotation of the rotating shaft 902, thereby making the soft filter 903 move in a circulation, and the temperature sensor is used to detect the temperature of the sensor body 3.

[0039] After the electromagnet 917 is energized, the side of the electromagnet 917 close to the cleaning sleeve 916 is at level N, and the side of the cleaning sleeve 916 close to the electromagnet 917 is at level S, so that after the electromagnet 917 is energized, there is a magnetic attraction between the electromagnet 917 and the cleaning sleeve 916.

[0040] During the use of the present invention, firstly, the pin 4 is passed through the wiring hole on the PCB board and soldered, and then the screw is passed through the mounting hole 8 to connect and fix the support leg 7 to the PCB board. At this time, during the use of the PCB board, the sensor body 3 will also be used.

[0041] During the normal operation of the sensor body 3 , the sensor body 3 will generate heat. The temperature of the sensor body 3 can be detected with the assistance of the temperature sensor.

[0042] When the temperature detection value of the temperature sensor reaches the first threshold value, it indicates that the heat dissipation copper plate 6 and the heat dissipation fins 5 can no longer meet the heat dissipation requirements of the sensor body 3. The system will control the first motor 913 to start, and the output end of the first motor 913 will drive the rotation of the turntable 914. The rotation of the turntable 914 will drive the rotation of the fan blades 915. The rotation of the fan blades 915 will generate downward wind force. Under the action of wind force, the outside air passes through the soft filter 903 from the upper end of the through hole 901 into the through hole 901, and then the air in the through hole 901 passes through the soft filter 903 into the connecting pipe 904.

[0043] When the outside air enters the connecting pipe 904 and acts on the heat dissipation copper plate 6, the dust in the air is filtered with the assistance of the two soft filters 903 to prevent the dust from adhering to the heat dissipation copper plate 6 and affecting the heat dissipation effect of the heat dissipation copper plate 6. Since the top of the heat dissipation copper plate 6 is provided with an inclined surface, when the air entering the connecting pipe 904 acts on the heat dissipation copper plate 6, the gas will diffuse into the air hole 905 and then enter the air channel in the outer shell 1. The air in the air channel will be discharged from the air outlet groove 906. The gas discharged from the air outlet groove 906 will act on the pin 4, thereby cleaning the dust at the pin 4. In addition, since the air will be heated when passing through the heat dissipation copper plate 6 to complete the heat exchange, the air discharged from the air outlet groove 906 is hot air. Under the action of the hot air, the gap between the base 2 and the PCB board can also be dried to prevent water droplets from condensing between multiple pins 4 and then causing a short circuit.

[0044] As the detection value of the temperature sensor continues to rise, it indicates that the above measures cannot meet the heat dissipation requirements of the sensor body 3. The system determines that the soft filter 903 is blocked, so that the wind cannot flow smoothly in the equipment. When the detection value of the temperature sensor rises to the second threshold value, the system controls the second motor 918 to start the set time. After the second motor 918 is started, the output end of the second motor 918 drives the rotation of the rotating shaft 902. The rotation of the rotating shaft 902 will cause the soft filter 903 to move in a cycle. One side of the soft filter 903 will enter the mounting shell 9, and the other side of the soft filter 903 will extend from the mounting shell 9, so that the soft filter 903 corresponding to the through hole 901 is replaced to ensure that the wind can pass through the through hole 901 smoothly.

[0045] When the soft filter 903 moves into the mounting shell 9, the mounting shell 9 will scrape off the impurities on the soft filter 903, and the scraper 912 will be bent and enter the mounting shell 9. At the same time, the soft filter 903 on the other side will extend out of the mounting shell 9, and the bent scraper 912 will return to a vertical state under the action of elasticity. In this process, the soft filter 903 will vibrate, which is beneficial for cleaning the soft filter 903 under the action of vibration, and the scraper 912 located at the lower end of the fan blade 915 will scrape the impurities to one side when moving, thereby ensuring the smoothness of the lower part of the through hole 901.

[0046] After performing the above steps, when the temperature detection value of the temperature sensor still remains in an upward state instead of decreasing, the system determines that too much dust and impurities are adhered to the fan blades 915, thereby weakening the wind force generated by the rotation of the fan blades 915. At this time, the system controls the electromagnet 917 in the mounting shell 9 to be energized. After the electromagnet 917 is energized, it generates a magnetic attraction force with the cleaning sleeve 916. As the fan blades 915 rotate, when the cleaning sleeve 916 moves close to the electromagnet 917, the cleaning sleeve 916 will move in the direction away from the turntable 914. When the fan blades 915 rotate away from the electromagnet 917, the cleaning sleeve 916 will move in the direction of the turntable 914 due to the elastic member provided between the cleaning sleeve 916 and the turntable 914. When the cleaning sleeve 916 moves on the fan blades 915, the cleaning sleeve 916 will scrape off the impurities adhered to the fan blades 915, so that the rotation of the fan blades 915 can generate stable wind force for heat dissipation.

[0047] After taking the above measures, when the detection value of the temperature sensor still rises to the third threshold value, the system determines that the sensor body 3 has a fault, causing the temperature abnormality. The system controls the first motor 913 to start running at the highest power, so that the wind force generated by the fan blades 915 is the strongest. Therefore, the air flow rate discharged from the air outlet groove 906 is the largest. After the gas flow rate in the air outlet groove 906 increases, the gas acts on the limit rod 911. At this time, the protrusion can no longer limit the limit rod 911, so that the limit rod 911 moves toward the direction of pin 4. After the limit rod 911 is separated from the base 2, due to the action of the spring 909, the slider 908 will move quickly in the slide groove 907, so that the scraper 910 will cut off the pin 4, thereby completing the disconnection of the sensor body 3 and the PCB board, thereby realizing the power off of the sensor body 3, avoiding fire caused by the abnormally high temperature of the sensor body 3, and improving the safety of equipment use.

[0048] The present invention also provides a waterproof and dustproof method for a waterproof and dustproof component of a composite sensor structure, comprising the following steps:

[0049] Step 1: The temperature of the sensor body 3 is detected with the assistance of the temperature sensor. When the detection value of the temperature sensor reaches the first threshold, the first motor 913 is started to rotate the fan blades 915 to generate wind force. Under the action of the wind force, the heat dissipation copper plate 6 is assisted in heat dissipation, and the air outlet groove 906 discharges hot air to remove dust and dry the space between the base 2 and the PCB board.

[0050] Step 2: As the detection value of the temperature sensor rises to reach the second threshold, the system controls the second motor 918 to start, so that the soft filter 903 moves in a circular motion. When the soft filter 903 moves, the mounting shell 9 and the scraper 912 work together to clean the soft filter 903.

[0051] Step 3: After step 2 is completed, when the detection value of the temperature sensor continues to rise, the system controls the electromagnet 917 to be energized, so that the cleaning sleeve 916 moves on the fan blade 915 under the action of magnetic force, thereby cleaning the fan blade 915 and ensuring that the fan blade 915 rotates to generate stable wind force.

[0052] Step 4: After step 3 is completed, when the detection value of the temperature sensor still rises to the third threshold value, the system determines that the sensor body 3 has a fault. At this time, the system controls the first motor 913 to operate at maximum power, so that the gas flow rate discharged from the air outlet groove 906 increases, thereby increasing the force acting on the limit rod 911, causing the limit rod 911 to separate from the air outlet groove 906, so that under the action of the spring 909, the scraper 910 cuts off the pin 4, so that the sensor body 3 is powered off to avoid fire caused by high temperature.

[0053] The main functions achieved by the present invention are: by setting the soft filter 903, the fan blade 915, the cleaning sleeve 916 and the electromagnet 917 and other components, when the detection value of the temperature sensor reaches the first threshold value, the fan blade 915 rotates to generate wind force, under the action of the wind force, the heat dissipation copper plate 6 is assisted to dissipate heat, and the hot air is discharged from the air outlet groove 906, so as to remove impurities and dry the space between the base 2 and the PCB board, and avoid the short circuit of the pin 4. When the detection value of the temperature sensor reaches the second threshold value, the soft filter 903 is moved to clean the soft filter 903. Clean, and move the cleaning sleeve 916 on the fan blade 915 to clean the impurities on the fan blade 915, ensuring that the rotation of the fan blade 915 generates stable wind force to ensure stable heat dissipation. When the detection value of the temperature sensor reaches the third threshold value, the rotation speed of the fan blade 915 is accelerated, the flow rate of the gas discharged from the air outlet groove 906 is increased, the limit rod 911 is separated from the air outlet groove 906, and the scraper 910 is used with the assistance of the spring 909 to cut off the pin 4, thereby cutting off the power to the sensor body 3 to avoid fire caused by the abnormally high temperature of the sensor body 3.

[0054] The composite sensor structure and the waterproof and dustproof component thereof of the present invention are installed, connected or set in common mechanical ways, and can be implemented as long as they can achieve their beneficial effects.

[0055] All technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0056] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A composite sensor structure, comprising a housing (1), characterized in that: A base (2) is arranged at the lower end of the housing (1); a sensor body (3) is arranged at the top of the base (2) in the housing (1); a pin (4) is arranged at the lower end of the sensor body (3); the pin (4) passes through the base (2); a heat dissipation fin (5) is arranged at the external side end of the housing (1); a heat dissipation copper plate (6) is arranged at the top of the housing (1); a support foot (7) is arranged at the side end of the base (2); and a mounting hole (8) is arranged on the support foot (7).

2. A waterproof and dustproof assembly of a composite sensor structure as claimed in claim 1, comprising a mounting shell (9), characterized in that: The mounting shell (9) is arranged on the top of the outer shell (1); a through hole (901) is arranged in the middle of the mounting shell (9); a rotating shaft (902) is rotatably arranged in the mounting shell (9); a soft filter (903) is arranged in the mounting shell (9); the soft filter (903) is wound around the outsides of two rotating shafts (902); a connecting pipe (904) is arranged between the mounting shell (9) and the outer shell (1); the connecting pipe (904) is connected to the through hole (901); the heat dissipation copper plate (6) is located in the connecting pipe (904); the top of the heat dissipation copper plate (6) is arranged in an arc shape; and an air hole (905) is arranged at the side end of the connecting pipe (904).

3. The waterproof and dustproof assembly according to claim 2, characterized in that: An air passage is arranged in the shell (1), the air hole (905) is communicated with the air passage, an air outlet groove (906) is arranged at the lower end of the base (2), the air outlet groove (906) is communicated with the air passage, two slide grooves (907) are also arranged at the lower end of the base (2), a slider (908) is slidably arranged in the slide groove (907), a spring (909) is arranged between the slider (908) and the side wall of the slide groove (907), a scraper (910) is arranged at the lower end of the slider (908), a limiting rod (911) is arranged on the side of the slider (908) away from the spring (909), the limiting rod (911) is inserted into the air outlet groove (906), the limiting rod (911) is provided with an inclined surface on the side of the air outlet groove (906), and the limiting rod (911) is provided with a protrusion on the side of the air outlet groove (906).

4. The waterproof and dustproof assembly according to claim 3, characterized in that: The soft filter screen (903) is provided with a scraper (912), the scraper (912) is made of elastic material, a plurality of scrapers (912) are provided on the soft filter screen (903), and the scrapers (912) on the soft filter screen (903) are evenly arranged.

5. The waterproof and dustproof assembly according to claim 4, characterized in that: A first motor (913) is arranged in the mounting shell (9), and the first motor (913) is arranged on the inner wall of the through hole (901) of the mounting shell (9). A rotating disk (914) is arranged at the output end of the first motor (913), and a fan blade (915) is arranged at the side end of the rotating disk (914). A cleaning sleeve (916) is arranged on the fan blade (915), and the cleaning sleeve (916) is magnetic. An electromagnet (917) is also arranged in the mounting shell (9).

6. The waterproof and dustproof assembly according to claim 2, characterized in that: A second motor (918) is disposed outside the mounting shell (9), and an output end of the second motor (918) is connected to the rotating shaft (902). A temperature sensor is also disposed inside the housing (1), and the temperature sensor is disposed at a side end of the sensor body (3).

7. The waterproof and dustproof assembly according to claim 5, characterized in that: After the electromagnet (917) is energized, the side of the electromagnet (917) close to the cleaning sleeve (916) is at level N, and the side of the cleaning sleeve (916) close to the electromagnet (917) is at level S.

8. A waterproof and dustproof method for a waterproof and dustproof component as claimed in claim 7, characterized in that: The steps include: Step 1: The temperature of the sensor body (3) is detected with the assistance of a temperature sensor. When the detection value of the temperature sensor reaches a first threshold value, the first motor (913) is started to rotate the fan blades (915) to generate wind force, and under the action of the wind force, the heat dissipation copper plate (6) is assisted to dissipate heat, and the air outlet groove (906) discharges hot air to remove dust and dry the space between the base (2) and the PCB board; Step 2: As the detection value of the temperature sensor rises and reaches the second threshold value, the system controls the soft filter (903) to move in a circular motion. When the soft filter (903) moves, the mounting shell (9) and the scraper (912) work together to clean the soft filter (903); Step 3: After step 2 is completed, when the detection value of the temperature sensor continues to rise, the system controls the electromagnet (917) to be energized, so that the cleaning sleeve (916) is moved on the fan blade (915) by the magnetic force, thereby cleaning the fan blade (915) to ensure that the fan blade (915) rotates to generate stable wind force; Step 4: After step 3 is completed, when the detection value of the temperature sensor still rises to the third threshold value, the system determines that the sensor body (3) has a fault. At this time, the system controls the first motor (913) to operate at maximum power, so that the gas flow rate discharged from the gas outlet groove (906) increases, thereby increasing the force acting on the limit rod (911), causing the limit rod (911) to separate from the gas outlet groove (906), so that the scraper (910) cuts off the pin (4) under the action of the spring (909), so that the sensor body (3) is powered off to avoid fire caused by high temperature.

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