Ultrasonic wind meter and anti-freezing method thereof

Abstract

The invention relates to the anti-freezing technical field of anemometers, in particular to an ultrasonic anemometer and an anti-freezing method thereof.The ultrasonic anemometer comprises an anemometer lower shell, a plurality of detection elements located at the top end of the anemometer lower shell and an upper cover, and the anemometer lower shell and the upper cover are detachably connected through a plurality of connecting columns; the multiple connecting columns are all located on the outer side of the detection element, annular sealing blocks capable of sliding in the longitudinal direction are installed on the portions, located on the outer sides of the connecting columns, of the anemoscope lower shell, and a sealing block lifting device used for controlling the annular sealing blocks is arranged in the anemoscope lower shell. The interior of the closed space is heated through the heating pipeline, compared with an open type heating device, heat loss can be reduced, centralized utilization of heat is facilitated, and therefore lower power is adopted on the premise that the anti-freezing effect is guaranteed; synchronous movement of a plurality of components is achieved through a threaded rod, a tooth-shaped synchronous belt and the like, and the moving synchronism and stability of the annular sealing block are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of anemometer antifreezing, and in particular to an ultrasonic anemometer and an antifreezing method thereof. Background Art

[0002] Ultrasonic anemometers use multiple transducers to measure the propagation time of ultrasonic waves in the air to calculate wind speed and direction. They are used to monitor wind speed and direction in real time and provide data for weather forecasts and climate research.

[0003] When ice forms on the transducer surface, it will change the shape and smoothness of the ultrasonic transmitting / receiving surface, causing sound wave scattering or refraction, and increasing the error in propagation time calculation. When the protective cover or guide groove is blocked by ice, the accumulation of condensed water inside the device may cause a circuit short circuit. In heavy snow or freezing rain, the device may be completely wrapped in ice, causing the wind speed data of the meteorological station to be interrupted, affecting weather forecasts and disaster warnings. At this time, the transmission heating element may not be able to melt the ice on the surface of the equipment. As the ice covering time increases, hardware damage may occur.

[0004] Therefore, it is necessary to invent an ultrasonic anemometer and an anti-freezing method thereof to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an ultrasonic anemometer and an anti-freezing method thereof, by providing a liftable annular sealing block to form a closed space that can be heated, and by physical isolation, to prevent hardware damage when the equipment is covered by ice.

[0006] To achieve this object, the present invention adopts the following technical solutions: Provided is an ultrasonic anemometer; comprising an anemometer lower shell, a plurality of detection elements located at the top of the anemometer lower shell, and an upper cover; the anemometer lower shell and the upper cover are detachably connected via a plurality of connecting columns, the plurality of connecting columns are located on the outside of the detection elements, an annular sealing block capable of sliding in the longitudinal direction is installed on the outside of the connecting columns of the anemometer lower shell, a sealing block lifting device for controlling the annular sealing block is arranged inside the anemometer lower shell, and an annular stopper capable of fitting with the outer wall of the annular sealing block is installed at the bottom end of the upper cover; heating pipes for heating are installed inside the anemometer lower shell and the upper cover, and heating coils for heating the heating pipes are arranged on the outside of some heating pipes; When the annular sealing block is in the jacking state, the annular sealing block fits with the annular stopper, and the area where the detection element is located is in a sealed state; When the annular sealing block is in the storage state, the top end of the annular sealing block is flush with the top end of the lower shell of the anemometer.

[0007] As a preferred solution of an ultrasonic anemometer, the sealing block lifting device includes a threaded rod, a pulley, a toothed synchronous belt and a driving device. A plurality of guide grooves are formed inside the lower housing of the anemometer. A plurality of the threaded rods are rotatably installed inside the guide grooves. The pulley is sleeved on the extended end at the bottom of the threaded rod. The toothed synchronous belt is meshed with a plurality of pulleys at the same time. A plurality of threaded connection blocks are installed at the bottom end of the annular sealing block. The threaded connection blocks are slidably located inside the guide grooves and are threadedly connected with the threaded rods.

[0008] As a preferred solution of an ultrasonic anemometer, the driving device includes a rotating motor, a driving bevel gear and a driven bevel gear. The rotating motor is installed at the bottom end of the lower housing of the anemometer. The driven bevel gear is installed at the bottom end of one of the threaded rods. The driving bevel gear is installed at the output end of the rotating motor and meshes with the driven bevel gear. A motor mounting bracket for fixing the motor is detachably installed at the bottom end of the lower housing of the anemometer.

[0009] As a preferred solution of an ultrasonic anemometer, the heating duct includes an upper ventilation duct and a lower ventilation duct. The lower ventilation duct is installed inside the lower housing of the anemometer. A wind supply component is installed at the bottom end of the lower housing of the anemometer. The wind supply component is used to drive the gas flow inside the lower ventilation duct. The upper ventilation duct is located inside the upper cover. An air outlet for discharging excess gas is provided at the top end thereof. A rain-proof cap for preventing rainwater from entering the air outlet is provided at the top end of the upper cover.

[0010] As a preferred solution of an ultrasonic anemometer, threaded connections with opposite helix directions are respectively provided at both ends of the connecting column and are threadedly connected with the lower housing and the upper cover of the anemometer respectively. A hollow duct is formed in the middle of the connecting column. The upper ventilation duct and the lower ventilation duct are communicated through the hollow duct.

[0011] As a preferred solution of an ultrasonic anemometer, an installation block for reducing the connection difficulty of the heating duct is sleeved on the outside of the connecting column.

[0012] As a preferred solution of an ultrasonic anemometer, a plurality of annular ducts are provided in the heating duct. The heating coil is installed on the outside of the annular duct.

[0013] As a preferred solution of an ultrasonic anemometer, a sensor assembly is provided inside the annular blocking block to control the opening and closing of the heating coil when the annular sealing block contacts it.

[0014] Provide an anti-freezing method for an ultrasonic anemometer. Step S1: When encountering extremely low temperature weather, the sensor assembly controls the rotating motor to drive the threaded rod and the pulley to rotate. The pulley drives the toothed synchronous belt to rotate, and multiple threaded rods rotate synchronously. The annular sealing block moves upward, and the annular sealing block fits with the annular stop block. The detection element and the connecting column are in a closed space. Step S2: When the position sensor in the sensor assembly detects that the annular sealing block fits with the annular stop block, control the opening of the air supply assembly and the heating coil. The air supply assembly injects air into the lower ventilation duct. The air is heated by the heating coil and is transported to the inside of the upper ventilation duct through the hollow pipe. Step S3: Due to the shielding of the annular sealing block, the heat inside the closed space accumulates, so that the closed space is in a relatively stable temperature range for a long time. By physically isolating the wind and snow, it is avoided that ice and snow cover the surface of the sensor, thereby improving the anti-freezing effect.

[0015] Step S4: When encountering normal low temperature weather, the top of the annular sealing block is flush with the top of the lower housing of the anemometer. The heat transmitted through the hollow pipe, the upper ventilation duct and the lower ventilation duct heats the detection element by thermal radiation to prevent the detection element from freezing.

[0016] The beneficial effects of the present invention: Through the setting of the annular sealing block and the annular stop block, a closed space can be formed at extremely low temperatures, and the attachment of ice and snow and the conduction path of low temperature can be physically blocked to achieve the anti-freezing effect of the anemometer. The setting of the hollow pipe of the connecting column and the connecting threads at both ends facilitates the connection between the upper ventilation duct and the lower ventilation duct, so that the heated air can be transported upward, and then the area where the detection element is located can be heated. By heating the inside of the closed space through the heating pipe, compared with the open heating device, the heat loss can be reduced, which is conducive to the centralized utilization of heat, so that a lower power can be adopted on the premise of ensuring the anti-freezing effect; by using threaded rods, toothed synchronous belts, etc. to realize the synchronous movement of multiple components, the synchronism and stability of the movement of the annular sealing block are ensured. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments of the present invention. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the annular sealing block in the contracted state of the present invention.

[0019] Figure 2It is the assembly schematic diagram of the annular seal block of the present invention in the jacking state.

[0020] Figure 3 It is the structural schematic diagram of the seal block lifting device of the present invention.

[0021] Figure 4 It is the structural schematic diagram of the annular seal block of the present invention.

[0022] Figure 5 It is the structural schematic diagram of the heating pipeline of the present invention.

[0023] Figure 6 It is the structural schematic diagram of the annular stop block of the present invention.

[0024] Figure 7 It is the structural schematic diagram of the threaded rod of the present invention.

[0025] Figure 8 It is the structural schematic diagram of the positional relationship of the connecting column of the present invention.

[0026] Figure 9 It is the structural schematic diagram of the position of the threaded connection block of the present invention.

[0027] In the figure: 1. Lower housing of the anemometer; 2. Upper cover; 3. Rainproof cap; 4. Connecting column; 5. Detection element; 6. Annular stop block; 7. Annular seal block; 8. Air supply assembly; 9. Motor mounting bracket; 10. Rotating motor; 11. Driving bevel gear; 12. Driven bevel gear; 13. Belt pulley; 14. Tooth-shaped synchronous belt; 15. Lower ventilation duct; 16. Threaded rod; 17. Guide groove; 18. Heating coil; 19. Mounting block; 20. Hollow duct; 21. Upper ventilation duct; 22. Connecting thread; 23. Sensor assembly; 24. Threaded connection block. Specific embodiments

[0028] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation of this patent; in order to better illustrate the embodiments of the present invention, some components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] refer to Figures 1 to 9 The present invention provides an ultrasonic anemometer including an anemometer lower shell 1, a plurality of detection elements 5 located at the top of the anemometer lower shell 1, and an upper cover 2, wherein the anemometer lower shell 1 and the upper cover 2 are detachably connected via a plurality of connecting columns 4, and the plurality of connecting columns 4 are located on the outside of the detection elements 5, and the anemometer lower shell 1 is provided with an annular sealing block 7 capable of sliding in the longitudinal direction on the outside of the connecting columns 4, and the anemometer lower shell 1 is provided with a sealing block lifting device for controlling the annular sealing block 7, and the bottom end of the upper cover 2 is provided with an annular stopper 6 capable of fitting with the outer wall of the annular sealing block 7; heating pipes for heating are installed inside the anemometer lower shell 1 and the upper cover 2, and a heating coil 18 for heating the heating pipes is provided on the outside of some heating pipes; When the annular sealing block 7 is in the jacking state, the annular sealing block 7 fits with the annular stopper 6, and the area where the detection element 5 is located is in a sealed state; When the annular sealing block 7 is in the stored state, the top end of the annular sealing block 7 is flush with the top end of the anemometer lower housing 1 .

[0033] The inner wall of the annular sealing block 7 may be provided with an insulation layer for maintaining the temperature inside the enclosed space, and the connecting column 4 may be made of a material with a strong heat dissipation capability, such as copper, for heating the enclosed space by heat radiation.

[0034] The sealing block lifting device includes a threaded rod 16, a belt pulley 13, a toothed synchronous belt 14 and a driving device. A plurality of guiding grooves 17 are formed inside the lower housing 1 of the anemometer. The plurality of threaded rods 16 are rotatably installed inside the guiding grooves 17. The belt pulley 13 is sleeved on the extended end at the bottom of the threaded rod 16. The toothed synchronous belt 14 is meshed with a plurality of belt pulleys 13 simultaneously. A plurality of threaded connection blocks 24 are installed at the bottom end of the annular sealing block 7. The threaded connection blocks 24 are slidably located inside the guiding grooves 17 and are threadedly connected with the threaded rods 16. The toothed synchronous belt 14 drives the plurality of threaded rods 16 to synchronously drive, so as to realize the synchronous lifting of the annular sealing block 7 and ensure its stable pushing out. During the heating process of the lower ventilation duct, the position where the annular sealing block 7 is located can also be heated to prevent it from freezing in the contracted state and avoid the situation where it cannot be pushed out.

[0035] The driving device includes a rotating motor 10, a driving bevel gear 11 and a driven bevel gear 12. The rotating motor 10 is installed at the bottom end of the lower housing 1 of the anemometer. The driven bevel gear 12 is installed at the bottom end of one of the threaded rods 16. The driving bevel gear 11 is installed at the output end of the rotating motor 10 and meshes with the driven bevel gear 12. A motor mounting bracket 9 for fixing the motor is detachably installed at the bottom end of the lower housing 1 of the anemometer. The rotating motor 10 is fixed through the motor mounting bracket 9 and is located at the bottom end of the lower housing 1 of the anemometer, which is convenient for the maintenance and replacement of the rotating motor 10.

[0036] The heating duct includes an upper ventilation duct 21 and a lower ventilation duct 15. The lower ventilation duct 15 is installed inside the lower housing 1 of the anemometer. An air supply component 8 is installed at the bottom end of the lower housing 1 of the anemometer. The air supply component 8 is used to drive the gas flow inside the lower ventilation duct 15. The upper ventilation duct 21 is located inside the upper cover 2, and a vent for discharging excess gas is provided at its top end. A rainproof cap 3 for preventing rainwater from entering the vent is provided at the top end of the upper cover 2. The gas discharged from the vent impacts the bottom end of the rainproof cap 3 and can diffuse in all directions to blow the ice and snow, further avoiding the accumulation of ice and snow on the upper cover 2, thereby reducing the energy consumption required for heating and thawing it.

[0037] Both ends of the connecting column 4 are provided with connecting threads 22 with opposite helix directions and are threadedly connected with the lower housing 1 of the anemometer and the upper cover 2 respectively. A hollow duct 20 is formed in the middle of the connecting column 4. The upper ventilation duct 21 and the lower ventilation duct 15 are communicated through the hollow duct 20. The opposite helix directions of the connecting threads 22 are used to simultaneously connect the lower housing 1 of the anemometer and the upper cover 2 during the installation of the connecting column 4 to avoid loosening.

[0038] An installation block 19 for reducing the connection difficulty of the heating pipeline is sleeved outside the connecting column 4. Multiple protrusions or depressions are arranged on the outer surface of the installation block 19 to increase the friction with the hand, facilitating the rotation of the connecting column 4 during the installation process.

[0039] A plurality of annular pipelines are arranged in the heating pipeline, and the heating coil 18 is installed outside the annular pipeline. The arrangement of the plurality of annular pipelines enables the heated air to flow evenly inside the lower housing 1 and the upper cover 2 of the anemometer, achieving the purpose of uniform heating.

[0040] A sensor assembly 23 is arranged inside the annular block 6 to control the opening and closing of the heating coil 18 when the annular sealing block 7 contacts it. The sensor assembly 23 includes a position sensor for detecting whether the annular sealing block 7 reaches a specified position, and also includes a temperature detection sensor for detecting the temperature inside the enclosed space.

[0041] Provide an anti-icing method for an ultrasonic anemometer. Step S1: When encountering extremely low temperature weather, the sensor assembly 23 controls the rotation motor 10 to drive the threaded rod 16 and the belt pulley 13 to rotate. The belt pulley 13 drives the toothed synchronous belt 14 to rotate, and the plurality of threaded rods 16 rotate synchronously. The annular sealing block 7 moves upward, and the annular sealing block 7 fits with the annular block 6, and the detection element 5 and the connecting column 4 are in a closed space. Step S2: When the position sensor in the sensor assembly 23 detects that the annular sealing block 7 fits with the annular block 6, control the opening of the air supply assembly 8 and the heating coil 18. The air supply assembly 8 injects air into the lower ventilation pipeline 15, and the air is heated by the heating coil 18 and conveyed to the inside of the upper ventilation pipeline 21 through the hollow pipeline 20. Step S3: Through the shielding of the annular sealing block 7, the heat inside the enclosed space therein accumulates, so that the enclosed space is in a relatively stable temperature range for a long time. By physically isolating the wind and snow, the sensor surface is prevented from being covered by ice and snow, thereby improving the anti-icing effect. Step S4: When encountering normal low temperature weather, the top end of the annular sealing block 7 is flush with the top end of the anemometer lower housing 1. The heat transmitted through the hollow pipeline 20, the upper ventilation pipeline 21, and the lower ventilation pipeline 15 heats the detection element 5 through thermal radiation to prevent the detection element 5 from freezing.

[0042] When encountering extreme weather, after the existing anemometer device is buried by thick snow, the heating element can only melt the snow layer on the contact surface and may not be able to remove the accumulated snow around in time. However, the enclosed space generated by the annular sealing block 7 in this device can reduce the direct coverage of the sensor surface by snowflakes, significantly improving the anti-icing effect of the anemometer.

[0043] In the present invention, through the provision of the annular sealing block 7 and the annular stop block 6, a sealed space can be formed at extremely low temperatures, and the attachment of ice and snow and the conduction path of low temperature can be physically blocked, achieving the anti-freezing effect of the anemometer. The provision of the hollow pipe 20 of the connecting column 4 and the connecting threads 22 at both ends facilitates the connection between the upper ventilation pipe 21 and the lower ventilation pipe 15, so that the heated air can be conveyed upward, and then the area where the detection element 5 is located can be heated. By heating the inside of the sealed space through the heating pipe, compared with the open heating device, heat loss can be reduced, which is conducive to the centralized utilization of heat, and thus a lower power can be adopted on the premise of ensuring the anti-freezing effect. By using the threaded rod 16, the toothed synchronous belt 14, etc., the synchronous movement of multiple components is realized, ensuring the synchronism and stability of the movement of the annular sealing block 7.

[0044] It should be noted that the above specific embodiments are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art should understand that various modifications, equivalent replacements, changes, etc. can be made to the present invention. However, as long as these transformations do not deviate from the spirit of the present invention, they should be within the protection scope of the present invention. In addition, some terms used in the description and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. An ultrasonic anemometer, characterized in that: The anemometer comprises a lower shell (1), a plurality of detection elements (5) located at the top of the lower shell (1) of the anemometer, and an upper cover (2), wherein the lower shell (1) of the anemometer and the upper cover (2) are detachably connected via a plurality of connecting columns (4), the plurality of connecting columns (4) are all located on the outside of the detection elements (5), an annular sealing block (7) capable of sliding in the longitudinal direction is installed on the outside of the connecting columns (4) of the lower shell (1), a sealing block lifting device for controlling the annular sealing block (7) is arranged inside the lower shell (1) of the anemometer, and an annular stopper (6) capable of fitting with the outer wall of the annular sealing block (7) is installed at the bottom end of the upper cover (2); heating pipes for supplying heat are installed inside the lower shell (1) of the anemometer and the upper cover (2), and heating coils (18) for heating the heating pipes are arranged on the outside of some of the heating pipes; When the annular sealing block (7) is in a lifted state, the annular sealing block (7) fits the annular stopper (6), and the area where the detection element (5) is located is in a sealed state; When the annular sealing block (7) is in the stored state, the top end of the annular sealing block (7) is flush with the top end of the anemometer lower housing (1).

2. An ultrasonic anemometer according to claim 1, characterized in that: The sealing block lifting device comprises a threaded rod (16), a pulley (13), a toothed synchronous belt (14) and a driving device. A plurality of guide grooves (17) are provided inside the anemometer lower housing (1). The plurality of threaded rods (16) are rotatably mounted inside the guide grooves (17). The pulley (13) is sleeved at the bottom extension of the threaded rod (16). The toothed synchronous belt (14) is meshedly connected with the plurality of pulleys (13) at the same time. A plurality of threaded connection blocks (24) are installed at the bottom end of the annular sealing block (7). The threaded connection blocks (24) are located inside the guide grooves (17) and slide, and are threadedly connected to the threaded rods (16).

3. An ultrasonic anemometer according to claim 2, characterized in that: The driving device comprises a rotating motor (10), a driving bevel gear (11), and a driven bevel gear (12); the rotating motor (10) is mounted on the bottom end of the anemometer lower housing (1); the driven bevel gear (12) is mounted on the bottom end of a threaded rod (16) on one side; the driving bevel gear (11) is mounted on the output end of the rotating motor (10) and meshes with the driven bevel gear (12); and a motor mounting frame (9) for fixing the motor is detachably mounted on the bottom end of the anemometer lower housing (1).

4. An ultrasonic anemometer according to claim 1, characterized in that: The heating duct comprises an upper ventilation duct (21) and a lower ventilation duct (15); the lower ventilation duct (15) is installed inside the anemometer lower shell (1); an air supply component (8) is installed at the bottom end of the anemometer lower shell (1); the air supply component (8) is used to drive the internal air flow of the lower ventilation duct (15); the upper ventilation duct (21) is located inside the upper cover (2); an exhaust port for exhausting excess air is provided at the top end thereof; and a rain cap (3) is provided at the top end of the upper cover (2) for preventing rainwater from entering the exhaust port.

5. An ultrasonic anemometer according to claim 4, characterized in that: Both ends of the connecting column (4) are provided with connecting threads (22) with opposite rotation directions, and are respectively threadedly connected to the lower shell (1) and the upper cover (2) of the anemometer. A hollow pipe (20) is provided in the middle of the connecting column (4), and the upper ventilation pipe (21) is connected to the lower ventilation pipe (15) through the hollow pipe (20).

6. An ultrasonic anemometer according to claim 5, characterized in that: The outer side of the connecting column (4) is provided with a mounting block (19) which reduces the difficulty of connecting the heating pipe.

7. An ultrasonic anemometer according to claim 1, characterized in that: A plurality of annular pipes are arranged in the heating pipe, and the heating coil (18) is installed on the outside of the annular pipes.

8. An ultrasonic anemometer according to claim 1, characterized in that: A sensor assembly (23) is provided on the inner side of the annular stopper (6) to control the opening and closing of the heating coil (18) when the annular sealing block (7) contacts the sensor assembly (23).

9. The anti-freezing method according to any one of claims 1 to 8, characterized in that: Step S1: When encountering extremely low temperature weather, the sensor assembly (23) controls the rotating motor (10) to drive the threaded rod (16) and the pulley (13) to rotate, the pulley (13) drives the toothed synchronous belt (14) to rotate, the plurality of threaded rods (16) rotate synchronously, the annular sealing block (7) moves upward, the annular sealing block (7) fits with the annular stopper (6), and the detection element (5) and the connecting column (4) are in a closed space; Step S2: When the position sensor in the sensor assembly (23) detects that the annular sealing block (7) is in contact with the annular stopper (6), the air supply assembly (8) and the heating coil (18) are controlled to be opened, and the air supply assembly (8) injects air into the lower ventilation duct (15). The air is heated by the heating coil (18) and transported to the interior of the upper ventilation duct (21) through the hollow duct (20); Step S3: The heat inside the enclosed space is gathered by shielding the annular sealing block (7), so that the temperature inside the enclosed space is kept in a relatively stable range for a long time. By physically isolating the wind and snow, ice and snow are prevented from covering the surface of the sensor, thereby improving the anti-freezing effect; Step S4: When encountering conventional low temperature weather, the top of the annular sealing block (7) is flush with the top of the lower shell (1) of the anemometer, and the heat transferred by the hollow pipe (20), the upper ventilation pipe (21) and the lower ventilation pipe (15) is used to heat the detection element (5) through thermal radiation to prevent the detection element (5) from freezing.

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