阅读说明：本技术 气象传感装置 (Meteorological sensing device ) 是由 李军 杨靖 王浩 王露 曾祥豹 王音心 母江东 陈超 文境潇 于 2020-12-29 设计创作，主要内容包括：本发明涉及一种气象传感装置,属于气象监测领域。该装置包括基座、螺旋式通风防辐射罩、气流加速罩、超声波风传感器和温湿度传感器,温湿度传感器设置于螺旋式通风防辐射罩的内部,超声波风传感器和温湿度传感器均与基座内设置的控制电路通信,以实现风信息和温湿度的采集与控制；螺旋式通风防辐射罩包括多个层叠设置的螺旋环状的防辐射片,相邻防辐射片之间存在间隙,形成螺旋通风道；防辐射片的下边缘向外扩大,形成倾斜面；气流加速罩包括与螺旋通风道相通的水平延伸的气流加速腔,以及分别位于气流加速腔两端的敞口,敞口的截面积朝气流加速腔逐渐减小。该装置集成度高、体积小、重量轻、防辐射强、测量精度高、抗污、防水、防尘、易于维护。(The invention relates to a meteorological sensing device, and belongs to the field of meteorological monitoring. The device comprises a base, a spiral type ventilation radiation-proof cover, an airflow accelerating cover, an ultrasonic wind sensor and a temperature and humidity sensor, wherein the temperature and humidity sensor is arranged inside the spiral type ventilation radiation-proof cover, and the ultrasonic wind sensor and the temperature and humidity sensor are both communicated with a control circuit arranged in the base so as to realize the collection and control of wind information and temperature and humidity; the spiral type ventilation radiation-proof shield comprises a plurality of spiral annular radiation-proof sheets which are stacked, and a gap is formed between every two adjacent radiation-proof sheets to form a spiral ventilation channel; the lower edge of the radiation-proof sheet is expanded outwards to form an inclined plane; the airflow accelerating cover comprises an airflow accelerating cavity which is communicated with the spiral ventilating duct and horizontally extends, and openings which are respectively positioned at two ends of the airflow accelerating cavity, wherein the cross section of each opening is gradually reduced towards the airflow accelerating cavity. The device has the advantages of high integration level, small volume, light weight, strong radiation protection, high measurement precision, pollution resistance, water resistance, dust prevention and easy maintenance.)

1. Meteorological sensing device, its characterized in that: the intelligent wind and humidity sensor comprises a base, a spiral ventilation radiation-proof cover, an airflow accelerating cover, an ultrasonic wind sensor and a temperature and humidity sensor, wherein the temperature and humidity sensor is arranged inside the spiral ventilation radiation-proof cover, and the ultrasonic wind sensor and the temperature and humidity sensor are both communicated with a control circuit arranged in the base so as to realize the collection and control of wind information and temperature and humidity; the spiral type ventilation radiation-proof shield comprises a plurality of spiral annular radiation-proof sheets which are stacked, and a gap is formed between every two adjacent radiation-proof sheets to form a spiral ventilation channel; the lower edge of the radiation-proof sheet is expanded outwards to form an inclined plane; the airflow accelerating cover comprises an airflow accelerating cavity which is communicated with the spiral ventilating duct and horizontally extends, and openings which are respectively positioned at two ends of the airflow accelerating cavity, wherein the cross section of each opening is gradually reduced towards the airflow accelerating cavity.

2. The weather sensing apparatus of claim 1, wherein: the base, the spiral type ventilation radiation protection cover, the airflow acceleration cover and the ultrasonic wind sensor are sequentially connected from bottom to top, airflow in the spiral ventilation channel spirally faces upwards, and the temperature and humidity sensor is installed on the base.

3. The weather sensing apparatus of claim 2, wherein: and power supply and communication cables of the ultrasonic wind sensor penetrate through the threading groove of the airflow accelerating cover and the threading channel of the spiral ventilation radiation-proof cover and are connected to corresponding wire connectors of a control circuit of the base.

4. The weather sensing apparatus of claim 2, wherein: the lower extreme of temperature and humidity sensor inserts the mounting hole on the base, fastens through fastening nut to seal through the sealing washer, so as to prevent that the base from leaking.

5. The weather sensing apparatus of claim 4, wherein: the temperature and humidity sensor is provided with a boss which is clamped on the upper surface of the base so as to prevent water from accumulating on the base.

6. The weather sensing apparatus of claim 2, wherein: a spiral annular flow guide sleeve is embedded in a central cavity at the upper edge of the radiation-proof sheet, and the flow guide sleeve is spiral along with the radiation-proof sheet to form a spiral ventilation duct together; one side of the guide sleeve facing the spiral ventilating duct is provided with a guide surface which guides the flow upwards in a spiral manner.

7. The weather sensing apparatus of claim 1, wherein: the base, the airflow accelerating cover, the spiral ventilation radiation-proof cover and the ultrasonic wind sensor are sequentially connected from bottom to top, and airflow in the spiral ventilation channel is spiral downward.

8. The weather sensing apparatus of claim 7, wherein: a spiral annular flow guide sleeve is embedded in a central cavity at the upper edge of the radiation-proof sheet, and the flow guide sleeve is spiral along with the radiation-proof sheet to form a spiral ventilation duct together; one side of the guide sleeve facing the spiral ventilating duct is provided with a guide surface for guiding the flow downwards in a spiral mode, and the horizontal inclination angle of the guide surface for guiding the flow downwards in the spiral mode is different from the horizontal inclination angle of the inclined surface of the radiation-proof sheet.

9. The weather sensing apparatus of claim 1, wherein: the airflow accelerating cavity is communicated with the spiral ventilating duct through more than one ventilating sieve holes, and the filtering net is arranged at the ventilating sieve holes.

10. The weather sensing apparatus of claim 1, wherein: the connection part of the airflow accelerating cavity and the opening is in smooth transition.

Technical Field

The invention belongs to the field of meteorological monitoring, and relates to a meteorological sensing device.

Background

The accurate and reliable measurement information of the weather sensing device has very wide influence on the production, life and social fields of the public. The mobile special weather station is weather equipment capable of monitoring field weather such as cities, regions and roads in real time when major disastrous weather events such as floods, hurricanes, sand storms, storm snow and the like occur. The timeliness and the evaluation accuracy of the equipment directly influence disaster-resistant command and life safety of people; meanwhile, the system can carry out on-site real-time meteorological monitoring and provide meteorological matching guarantee capability in national important activities (including major projects, scientific experiments, large international meetings and the like).

The integrated vehicle-mounted weather station is one of the mobile special weather stations, and needs to have the characteristics of small size, light weight, low power consumption, strong expansibility of observation elements, high installation and erection speed, strong environmental adaptability, multiple power supply modes and the like. The wind speed and direction elements are mostly used by mechanical anemorumbometers, and although the method is simple and reliable, the measuring part of the method is easy to wear under the working environment exposed outdoors for a long time due to the fact that the measuring part is provided with mechanical movable parts, the service life is limited, the maintenance cost is high, and the detection precision is not high.

In addition, the temperature and humidity sensor used for observing the atmospheric temperature and humidity can be subjected to solar radiation and ground reflected radiation, so that the measured value of the temperature and humidity sensor is higher than the real atmospheric temperature and humidity value. Among factors causing temperature and humidity measurement errors, the temperature and humidity sensor device and the matched system are 1-2 orders of magnitude lower than the measurement errors caused by radiation temperature rise, so that radiation becomes a main source influencing the temperature and humidity measurement errors. In the practical application process, a shutter or a spiral ventilation radiation-proof cover and other equipment are usually used for reducing the influence of external radiation on the measurement accuracy of the temperature and humidity sensor. The common louver box consists of a plurality of layers of blades, the natural spiral type ventilation radiation-proof cover consists of a plurality of layers of ring blades, the natural spiral type ventilation radiation-proof cover is provided with an umbrella-shaped upper plate and a lower plate with a radiation-proof function, and the temperature and humidity sensor is placed inside the louver box or the natural spiral type ventilation radiation-proof cover. However, the multilayer blade and ring structure of the traditional louver box and the natural radiation protection cover have the problems of being not beneficial to air flow circulation and poor radiation protection effect. Therefore, forced-air spiral-type ventilation radiation shields with fans have appeared, which are bulky and cannot support the power requirements of the fans by the solar power supply systems of most field weather stations, although they can generate higher-speed air flows to enhance the ventilation effect. Moreover, the reliability of the high-power fan in the field cannot be guaranteed for a long time due to environmental factors such as dust, ice, snow, insects and the like.

Aiming at the problems of easy abrasion, short service life, difficult maintenance and low precision of the mechanical anemorumbometer used for measuring by the meteorological sensing device, the problems of poor air flow circulation and poor radiation protection effect of the traditional natural radiation protection cover and the problems of large volume, large power consumption and difficult maintenance of the forced spiral type ventilation radiation protection cover, a better solution needs to be further explored.

Disclosure of Invention

In view of the above, the present invention provides a weather sensing device to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the meteorological sensing device comprises a base, a spiral ventilation radiation-proof cover, an airflow accelerating cover, an ultrasonic wind sensor and a temperature and humidity sensor, wherein the temperature and humidity sensor is arranged inside the spiral ventilation radiation-proof cover, and the ultrasonic wind sensor and the temperature and humidity sensor are both communicated with a control circuit arranged in the base so as to realize the collection and control of wind information and temperature and humidity; the spiral type ventilation radiation-proof shield comprises a plurality of spiral annular radiation-proof sheets which are stacked, and a gap is formed between every two adjacent radiation-proof sheets to form a spiral ventilation channel; the lower edge of the radiation-proof sheet is expanded outwards to form an inclined plane; the airflow accelerating cover comprises an airflow accelerating cavity which is communicated with the spiral ventilating duct and horizontally extends, and openings which are respectively positioned at two ends of the airflow accelerating cavity, wherein the cross section of each opening is gradually reduced towards the airflow accelerating cavity.

Further, base, spiral ventilation radiation protection cover, air flow acceleration cover and ultrasonic wave wind sensor from supreme consecutive down, and the air flow spiral is upwards in the spiral ventiduct, and temperature and humidity sensor installs on the base.

Furthermore, power supply and communication cables of the ultrasonic wind sensor penetrate through the threading groove of the airflow accelerating cover and the threading channel of the spiral ventilation radiation-proof cover to be connected to corresponding wire connectors of the control circuit of the base.

Further, the lower extreme of temperature and humidity sensor inserts the mounting hole on the base, fastens through fastening nut to seal through the sealing washer, so as to prevent that the base from leaking.

Furthermore, a boss is arranged on the temperature and humidity sensor and clamped on the upper surface of the base to prevent water from accumulating on the base.

Further, a spiral annular flow guide sleeve is embedded in a central cavity at the upper edge of the radiation-proof sheet, and the flow guide sleeve is spiral along with the radiation-proof sheet to form a spiral ventilation duct together; one side of the guide sleeve facing the spiral ventilating duct is provided with a guide surface which guides the flow upwards in a spiral manner.

Further, the base, the airflow accelerating cover, the spiral ventilation radiation-proof cover and the ultrasonic wind sensor are sequentially connected from bottom to top, and airflow in the spiral ventilation channel is spirally downward.

Further, a spiral annular flow guide sleeve is embedded in a central cavity at the upper edge of the radiation-proof sheet, and the flow guide sleeve is spiral along with the radiation-proof sheet to form a spiral ventilation duct together; one side of the guide sleeve facing the spiral ventilating duct is provided with a guide surface for guiding the flow downwards in a spiral mode, and the horizontal inclination angle of the guide surface for guiding the flow downwards in the spiral mode is different from the horizontal inclination angle of the inclined surface of the radiation-proof sheet.

Furthermore, the airflow accelerating cavity is communicated with the spiral ventilating duct through more than one ventilating sieve holes, and the filtering net is arranged at the ventilating sieve holes.

Further, the connection part of the airflow accelerating cavity and the opening is in smooth transition.

The invention has the beneficial effects that:

(1) the weather sensing device disclosed by the invention adopts the spiral type ventilation radiation-proof cover to form the spiral ventilation channel, when low wind speed and radiation temperature rise occur, the expansion density of hot air in the weather sensing device is reduced, the hot air can flow upwards along with the spiral ventilation channel in a spiral way, and external air is driven to continuously enter the spiral ventilation channel, so that the air inlet amount is increased, the ventilation performance is improved, the radiation-proof effect is improved, and the adverse effect of radiation on temperature and humidity measurement is reduced. Therefore, compared with the traditional natural radiation shield, the spiral type ventilation radiation shield has strong ventilation performance and good radiation protection effect; compared with a forced ventilation radiation shield, the radiation shield has the advantages of small volume, low power consumption and easy maintenance.

(2) The spiral ventilation radiation-proof cover of the meteorological sensing device disclosed by the invention is flexible in structure, can adopt a single-spiral structure, and can also form a double-spiral or even multi-spiral structure by embedding a flow guide sleeve in the radiation-proof sheet; and the guide surface of the guide sleeve can be designed to guide flow upwards in a spiral manner and can also be designed to guide flow downwards in a spiral manner.

(3) According to the meteorological sensing device disclosed by the invention, the flow guide sleeve plays a role in flow guide, the flow of the air flow is increased, the flow velocity of the air flow is accelerated, the influence of heat radiation, dust, water drops and the like on the internal temperature and humidity sensor can be effectively resisted, and the measurement accuracy of the temperature and humidity sensor is improved.

(4) According to the weather sensing device disclosed by the invention, a gap is reserved between the guide sleeve for guiding the flow downwards in a spiral manner and the corresponding radiation-proof sheet, so that the contact area with the air is increased, and the ventilation efficiency is favorably accelerated.

(5) The meteorological sensing device disclosed by the invention adopts the ultrasonic wind sensor to replace the traditional mechanical anemorumbometer, and has the advantages of high detection precision, durability, reliability and easiness in maintenance.

(6) The meteorological sensing device disclosed by the invention has the advantages of high integral integration level, small volume, light weight and good reliability. Adopt integrated form design, can effectively carry on multiple sensor, realize erectting fast, convenient installation.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of a weather sensing apparatus according to embodiment 1 of the present invention;

FIG. 2 is a schematic sectional view of a weather sensing device according to embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of a spiral ventilation radiation-proof cover I of the weather sensing device in embodiment 1 of the invention;

fig. 4 is a schematic structural view of a radiation-proof sheet of the weather sensing device according to embodiment 1 of the present invention;

FIG. 5 is a schematic view showing the airflow of the weather sensing apparatus according to embodiment 1 of the present invention;

FIG. 6 is a schematic structural view of a spiral ventilation radiation-proof cover II of the weather sensing device in embodiment 2 of the invention;

FIG. 7 is a schematic sectional view of a spiral ventilation radiation-proof cover II of the weather sensing device in embodiment 2 of the invention;

FIG. 8 is a schematic airflow diagram of a spiral ventilation radiation-proof cover II of the weather sensing device in embodiment 2 of the invention;

FIG. 9 is a schematic structural view of a spiral ventilation radiation-proof cover III of the weather sensing device in embodiment 3 of the invention;

FIG. 10 is a schematic sectional view of a spiral ventilation radiation-proof cover III of the weather sensing device in embodiment 3 of the invention;

fig. 11 is a schematic airflow diagram of a spiral ventilation radiation-proof cover III of the weather sensing device in embodiment 3 of the invention.

Reference numerals: the device comprises a spiral ventilation radiation-proof cover I1, a radiation-proof sheet 101, a spiral ventilation duct 102, a connecting hole 103, a base 4, a wire connector 401, a screw hole 402, an ultrasonic wind sensor 5, an airflow accelerating cover 6, an airflow accelerating cavity 601, an opening 602, a ventilation sieve hole 603, a temperature and humidity sensor 7, a boss 701 and a connecting rod 8;

the radiation-proof shield II2 of spiral ventilation, A type guide sleeve 201, the guide surface 202 that the spiral upwards guides the flow, A type stationary plane 203;

III3 of the spiral ventilation radiation-proof cover, a B-shaped guide sleeve 301, a guide surface 302 for guiding the flow downwards in a spiral mode and a B-shaped fixing surface 303.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Please refer to fig. 1 to 5, which are a weather sensing device, comprising a base 4, a spiral ventilation radiation-proof shield I1, an airflow accelerating shield 6 and an ultrasonic wind sensor 5, which are sequentially connected from bottom to top, wherein a temperature and humidity sensor 7 is disposed inside the spiral ventilation radiation-proof shield I1 and is installed on the base 4, and the ultrasonic wind sensor 5 and the temperature and humidity sensor 7 are both in communication with a control circuit disposed in the base 4 to realize the collection and control of wind information and temperature and humidity.

Particularly, the ultrasonic wind sensor 5 is a part for realizing wind information acquisition based on an ultrasonic resonance wind measuring principle, replaces a traditional mechanical anemorumbometer, and is high in detection precision, durable, reliable and easy to maintain. The ultrasonic wind sensor 5 is mounted on the upper surface of the airflow accelerating cover 6 by screws, and power supply and communication cables of the ultrasonic wind sensor 5 are connected to corresponding connectors 401 of the control circuit of the base 4 through the threading slot of the airflow accelerating cover 6 and the threading passage of the spiral ventilation radiation-proof cover I1.

The spiral ventilation radiation-proof cover I1 comprises a plurality of spiral annular radiation-proof sheets 101 which are stacked, a gap is formed between every two adjacent radiation-proof sheets 101 to form a spiral ventilation duct 102, and air flow in the spiral ventilation duct 102 spirals upwards; the lower edge of the radiation shielding sheet 101 is outwardly enlarged to form an inclined surface for ventilation. The horizontal inclination angle of the inclined surface of the radiation-proof sheet 101 ranges from 40 ° to 60 °. The radiation protection sheets 101 are provided with three connecting holes 103 uniformly distributed around the axis, the connecting holes 103 of the radiation protection sheets 101 are aligned, the radiation protection sheets 101 are fixed in a layered manner through the connecting rod 8 inserted in the connecting holes 103, and the lower end of the connecting rod 8 is installed on the base 4.

The radiation-proof sheet 101 is integrally formed by adopting light engineering plastics (such as PC and ASA) through die sinking processing, and is coated with an ultraviolet radiation-proof coating and a hydrophobic coating on the surface. The radiation protection sheet 101 has the advantages of high strength, light weight, good radiation protection performance, small impurity adhesive force and small wind resistance, ensures radiation protection, enhances air circulation, and is beneficial to improving the measurement accuracy and the service life of the temperature and humidity sensor 7 arranged in the radiation protection sheet.

The airflow accelerating cover 6 includes a horizontally extending airflow accelerating cavity 601 communicating with the spiral air duct 102, and openings 602 respectively located at both ends of the airflow accelerating cavity 601, and the sectional area of the opening 602 is gradually reduced toward the airflow accelerating cavity 601. The airflow accelerating cavity 601 performs beam current acceleration on the airflow collected by one opening 602, and the accelerated airflow is discharged from the other opening 602. The junction of the airflow accelerating cavity 601 and the opening 602 is smoothly transited, and the inner surface of the airflow accelerating cover 6 is subjected to surface treatment with low roughness, so as to reduce the obstruction of the airflow flowing through. The lower surface of the airflow accelerating cavity 601 is provided with a plurality of ventilation sieve holes 603, the ventilation sieve holes 603 are communicated with the spiral ventilating duct 102, and the filter screen is arranged at the ventilation sieve holes 603, so that large particle impurities in the airflow are filtered, and the large particle impurities are prevented from falling into the spiral ventilating duct 102.

When low wind speed and radiation temperature rise occur, the expansion density of hot air in the spiral ventilation radiation-proof cover I1 is reduced, the hot air can flow upwards along with the spiral ventilation duct 102 in a spiral mode, and external air is driven to continuously enter the spiral ventilation duct 102, so that the air inlet amount is increased, the ventilation performance is improved, the radiation-proof effect is improved, and the adverse effect of radiation on temperature and humidity measurement is reduced. Meanwhile, dust and impurities attached to the surfaces of the spiral ventilation radiation-proof cover I1 and the temperature and humidity sensor 7 can be taken away by spiral airflow formed by the spiral ventilation air duct 102 of the spiral ventilation radiation-proof cover I1, and the pollution resistance of the spiral ventilation radiation-proof cover I1 and the temperature and humidity sensor 7 is improved and the maintenance frequency is reduced by matching with a hydrophobic coating on the surface of the spiral ventilation radiation-proof cover I1.

When medium and high wind speed and radiation temperature rise occur, the airflow accelerating cavity 601 compresses the cross section area and accelerates the flow speed of the air entering from the opening 602 in unit time according to the air flowing model in the airflow accelerating cavity. According to the principle of conservation of energy when the bernoulli equation flows in the air gravitational field, the pressure at the communication position with the spiral air duct 102 is reduced by the accelerated air in the airflow acceleration cavity 601, so that the air in the spiral air duct 102 is pumped to the communication position, which is consistent with the direction of the hot air flowing upwards in the spiral air duct 102, and at the moment, the hot air is quickly pumped out of the spiral air duct 102, so that the air supplement from the outside to the spiral air duct 102 is increased, the ventilation effect of the spiral ventilation radiation-proof cover I1 is enhanced, and the measurement error caused by radiation temperature rise is reduced.

The lower extreme of temperature and humidity sensor 7 inserts the mounting hole on base 4, fastens through fastening nut to seal through the sealing washer, improve the leakproofness between temperature and humidity sensor 7 and base 4, prevent that the condition of leaking from appearing in base 4 upper surface. The temperature and humidity sensor 7 is provided with a boss 701, the boss 701 is clamped on the upper surface of the base 4, liquid such as rainwater can be discharged outwards, and the function of preventing the base 4 from accumulating water is achieved. In this embodiment, the temperature and humidity sensor 7 is digital and has a filter, and the material of the filter may be selected from materials such as polybutylene terephthalate (PBT), Polytetrafluoroethylene (PTFE) film, teflon, polyethylene, mesh, wire mesh, and polypropylene according to the protection level.

The base 4 is provided with screw holes 402 which are uniformly distributed, and the base 4 is arranged on a fixed platform (such as the ground) or a moving platform (such as a vehicle and a ship) through screws, so that an opening 602 of the airflow accelerating cover 6 is aligned with the incoming wind direction or the moving direction of the moving platform; the base 4 may also be mounted on a control turntable.

Example 2:

as shown in fig. 6 to 8, the weather sensing device provided in embodiment 2 adopts a spiral ventilation radiation-proof cover II2, and the difference between the spiral ventilation radiation-proof cover II2 and the spiral ventilation radiation-proof cover I1 is mainly that a spiral annular a-shaped flow guide sleeve 201 is embedded in a central cavity at the upper edge of the radiation-proof sheet 101, and the a-shaped flow guide sleeve 201 spirals along with the radiation-proof sheet 101 to form a spiral ventilation duct 102 together. One side of the a-shaped guide sleeve 201 facing the spiral air duct 102 is provided with a guide surface 202 guiding flow upwards in a spiral manner and a downward spiral a-shaped fixing surface 203 vertically intersected with the guide surface 202 guiding flow upwards in a spiral manner, wherein the horizontal inclination angle of the upward spiral guide surface 202 is 45-80 degrees, and the horizontal inclination angle of the downward spiral a-shaped fixing surface 203 is 10-45 degrees. The end where the a-shaped fixing surface 203 is located is attached to the top of the radiation-proof sheet 101, and a through hole corresponding to the connecting hole 103 of the radiation-proof sheet 101 is formed in the a-shaped fixing surface 203 so that the connecting rod 8 can penetrate through the through hole, and connection and layered fixing between the radiation-proof sheet 101 and the corresponding a-shaped flow guide sleeve 201 are achieved. The A-type flow guide sleeve 201 is made of light engineering plastics, and is coated with an ultraviolet radiation resistant coating and a hydrophobic coating.

The radiation-proof sheet 101 and the A-shaped flow guide sleeve 201 are used in combination, so that the airflow channel in the vertical direction is gradually reduced, the airflow is accelerated after entering under the condition of low wind speed, the pressure is reduced, and the supplement of new airflow is increased. After acceleration, the faster air flow spirally flows upwards along with the direction of the guide surface of the A-shaped guide sleeve 201, so that the air exchange between the central cavity of the A-shaped guide sleeve 201 and the air near the temperature and humidity sensor 7 arranged in the central cavity is accelerated, and the generated and accumulated hot air is taken away.

In addition, the A-shaped fixing surface 203 of the A-shaped flow guide sleeve 201 can also block the infringement of heat radiation, dust and water drops on the temperature and humidity sensor 7 arranged in the central cavity, and the capabilities of radiation protection, dust prevention, water prevention and ventilation efficiency are comprehensively improved.

Example 3:

as shown in fig. 9 to 11, the weather sensing device provided in embodiment 3 adopts a spiral ventilation radiation-proof cover III3, the base 4, the airflow acceleration cover 6, the spiral ventilation radiation-proof cover III3, and the ultrasonic wind sensor 5 of the weather sensing device are sequentially connected from bottom to top, and the airflow in the spiral ventilation duct 102 is spiral downward. A ventilation screen hole 603 is provided on the upper surface of the air flow acceleration chamber 601 to communicate with the spiral ventilation flue 102. The difference between the spiral ventilation radiation-proof cover III3 and the spiral ventilation radiation-proof cover I1 is that a spiral annular B-shaped guide sleeve 301 is embedded in a central cavity at the upper edge of the radiation-proof sheet 101, and the B-shaped guide sleeve 301 is spiral with the radiation-proof sheet 101 to form a spiral ventilation duct 102 together. One side of the B-shaped guide sleeve 301 facing the spiral air duct 102 is provided with a guide surface 302 for guiding the air flow downwards in a spiral manner, and is further provided with a B-shaped fixing surface 303 connected with the guide surface 302 for guiding the air flow downwards in a spiral manner, wherein the guide surface 302 for guiding the air flow downwards in a spiral manner is streamline (linear type is also available), the horizontal inclination angle range of the guide surface 302 for guiding the air flow downwards is 55-75 degrees, and the specific value of the horizontal inclination angle is different from that of the inclined surface of the radiation-proof sheet 101. The B-shaped fixing surface 303 is provided with a through hole corresponding to the connecting hole 103 of the radiation-proof sheet 101 for the connecting rod 8 to pass through, so that the radiation-proof sheet 101 and the corresponding B-shaped flow guide sleeve 301 are connected and fixed in a layered manner. The B-shaped guide sleeve 301 is made of light engineering plastics, and is coated with an ultraviolet radiation resistant coating and a hydrophobic coating. A gap is also arranged between the B-shaped guide sleeve 301 and the corresponding radiation-proof sheet 101.

The horizontal inclination angles between the guide surface 302 of the B-shaped guide sleeve 301 for guiding the air downwards in the spiral mode and the inclined surface of the corresponding radiation protection sheet 101 are different, so that the air flow in the B-shaped guide sleeve 301 and the corresponding radiation protection sheet 101 generates flow speed difference, and the air exchange speed and efficiency are improved; and the gap between the B-shaped guide sleeve 301 and the corresponding radiation-proof sheet 101 can increase the contact area with air, thereby further accelerating the ventilation efficiency.

In addition, the structure of the B-shaped flow guide sleeve 301 can effectively resist the influence of heat radiation, dust, water drops and the like on the internal temperature and humidity sensor 7, and improve the measurement accuracy of the temperature and humidity sensor 7.

For the spiral ventilation radiation-proof cover I1, the radiation-proof sheet 101 forms a single spiral structure; for the spiral type ventilation radiation-proof cover II2 and the spiral type ventilation radiation-proof cover III3, the radiation-proof sheet 101 is used as an outer spiral, and the A-shaped guide sleeve 201/B-shaped guide sleeve 301 is used as a corresponding inner spiral to form a double-spiral structure. In practical application, according to the actual size of the required spiral ventilation radiation-proof cover, a plurality of flow guide sleeves can be embedded in the radiation-proof sheet 101 to form a multi-spiral structure.

Certainly, in the above embodiment, under the condition that the actual power consumption requirement is met, the direct current fan can be additionally arranged at the top of the spiral ventilation radiation-proof cover to further improve the ventilation effect.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.