Indoor environment detection device

Abstract

The utility model is suitable for the technical field of indoor environment detection, and provides an indoor environment detection device, which comprises a shell, wherein a partition plate is fixedly arranged on the inner wall of the shell; the air inlet is formed in the shell; the metal separation net and the fan are arranged on the air inlet; the air outlet is formed in the top of the shell; the environment detection mechanism is arranged on the partition plate, and the environment detection mechanism is used for detecting the indoor environment; and the adsorption fixing mechanism is arranged on the shell and is used for adsorbing and fixing the device on an indoor plane. According to the indoor environment detection device provided by the scheme, the indoor environment can be monitored through the environment detection mechanism, the device can be conveniently mounted on an indoor plane through the adsorption fixing mechanism, and the device can be conveniently dismounted.

Description

Technical Field

[0001] The utility model belongs to the technical field of indoor environment detection, and in particular relates to an indoor environment detection device. Background Art

[0002] Indoor environment includes living rooms, office buildings, transportation, cultural and entertainment sports venues, hospital wards, school kindergarten classrooms and activity rooms, restaurants, hotels and other places. The quality of all indoor environments is closely related to health. Here we first talk about the home environment that everyone is exposed to. The home environment is an artificial micro-environment for family reunion, rest, study and housework. The quality of home environment and sanitation directly affects the morbidity and mortality of residents. Environmental protection is increasingly valued by people, but many people have not yet realized the impact of indoor environmental quality on health. Urban residents work, study and live indoors for about 90% of the whole day, and some elderly people and children stay indoors for even longer. Therefore, the relationship between the living environment and human health and children's growth and development is extremely close.

[0003] Although the existing indoor environment detection device can detect the indoor environment, it is often not convenient to install it on the indoor plane (wall, inner glass of the window), and it is inconvenient to disassemble it. Utility Model Content

[0004] In order to solve the technical problem that the existing indoor environment detection devices are inconvenient to install and disassemble, the utility model provides an indoor environment detection device.

[0005] The utility model is implemented as follows: an indoor environment detection device comprises: an outer shell with a partition fixedly installed on the inner wall; an air inlet opened on the outer shell; a metal partition and a fan arranged on the air inlet; an exhaust outlet opened on the top of the outer shell; an environment detection mechanism arranged on the partition, the environment detection mechanism is used to detect the indoor environment; an adsorption and fixing mechanism arranged on the outer shell, the adsorption and fixing mechanism is used to adsorb and fix the device on an indoor plane; a negative pressure mechanism arranged on the inner wall of the outer shell, the negative pressure mechanism is used to control a plurality of suction cups to be adsorbed on the indoor plane; a driving mechanism arranged on the inner wall of the outer shell, the driving mechanism is used to drive the negative pressure mechanism.

[0006] Preferably, the environment detection mechanism includes: a circuit board arranged on the partition and having a dust sensor, a PM2.5 sensor, a temperature and humidity sensor, a carbon monoxide sensor and a formaldehyde sensor; and a light intensity sensor and a touch screen arranged on the housing.

[0007] Preferably, the adsorption and fixing mechanism includes: a plurality of suction cups arranged on one side of the shell; a plurality of connecting tubes arranged on the suction cups and extending to the inside of the shell; and a negative pressure tube arranged on the plurality of connecting tubes.

[0008] Preferably, the negative pressure mechanism comprises: a negative pressure cylinder fixedly mounted on the inner wall of the shell and connected to the negative pressure tube; and a piston slidably mounted on the inner wall of the negative pressure cylinder and provided with a push-pull rod.

[0009] Preferably, the driving mechanism includes: a servo motor fixedly mounted on the inner wall of the shell; a screw fixedly mounted on the output shaft of the servo motor and rotatably connected to the inner wall of the shell; and a sliding plate threadedly sleeved on the screw and fixedly connected to the push-pull rod.

[0010] Preferably, a limit rod is fixedly mounted on the inner wall of the shell, and the limit rod is slidably connected to the sliding plate.

[0011] Preferably, a lithium battery is arranged on the inner wall of the shell, and the lithium battery is electrically connected to the circuit board.

[0012] Preferably, a charging interface is provided at the bottom of the shell, and the charging interface is electrically connected to the lithium battery. A photovoltaic panel is provided on one side of the shell, and the photovoltaic panel is electrically connected to the lithium battery.

[0013] Compared with the related art, the indoor environment detection device provided by the utility model has the following beneficial effects:

[0014] In this solution, a partition is fixedly installed on the inner wall of the shell to provide separation and support for the internal structure of the shell. The air inlet opened on the shell allows indoor air to enter the device for environmental testing. A metal screen and a fan are set on the air inlet. The metal screen plays a role in filtering and blocking large particles of impurities, while the fan is responsible for inhaling air. An exhaust port is also set on the top of the shell to discharge the tested air and maintain air circulation inside the device. An environmental detection mechanism is set on the partition, which is the core part of the device and is responsible for detecting the indoor environment, including parameters such as temperature, humidity, and air quality, to provide users with accurate indoor Environmental information. In addition, an adsorption fixing mechanism is also provided on the shell. The mechanism uses the principle of a suction cup to adsorb and fix the device on a flat surface in the room, such as a wall, glass, etc., thereby avoiding the inconvenience of traditional bracket installation and improving the convenience of use. In order to achieve the adsorption and fixing function, the device is also equipped with a negative pressure mechanism, which is provided on the inner wall of the shell. The mechanism generates negative pressure to enhance the adsorption force of the suction cup, ensuring that the device can be firmly adsorbed on the indoor plane. The driving mechanism is a key component that drives the negative pressure mechanism to work. It is also provided on the inner wall of the shell. It can control the negative pressure mechanism as needed, thereby controlling the adsorption and release of the suction cup.

[0015] To sum up, the indoor environment detection device of the utility model realizes accurate detection of the indoor environment through its unique design, and has a convenient adsorption and fixing function. The environment detection mechanism provides accurate indoor environment information, and the combination of the adsorption and fixing mechanism and the negative pressure mechanism ensures that the device can be stably fixed on the indoor plane, thereby improving the convenience and stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an indoor environment detection device provided by the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the side cross-sectional structure of;

[0018] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A shown in FIG.

[0019] Figure numerals: 1. outer shell; 2. partition; 3. air inlet; 4. metal partition; 5. fan; 6. exhaust outlet; 7. circuit board; 8. dust sensor; 9. PM2.5 sensor; 10. temperature and humidity sensor; 11. carbon monoxide sensor; 12. formaldehyde sensor; 13. light intensity sensor; 14. touch screen; 15. suction cup; 16. connecting pipe; 17. negative pressure pipe; 18. negative pressure cylinder; 19. piston; 20. push-pull rod; 21. servo motor; 22. screw; 23. limit rod; 24. sliding plate; 25. lithium battery; 26. charging interface; 27. photovoltaic panel. DETAILED DESCRIPTION

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] The present utility model provides an indoor environment detection device, such as Figure 1-3 As shown, the indoor environment detection device includes: a shell 1 with a partition 2 fixedly installed on the inner wall; an air inlet 3 opened on the shell 1; a metal partition 4 and a fan 5 arranged on the air inlet 3; an exhaust port 6 opened on the top of the shell 1; an environment detection mechanism arranged on the partition 2, and the environment detection mechanism is used to detect the indoor environment; an adsorption and fixing mechanism arranged on the shell 1, and the adsorption and fixing mechanism is used to adsorb and fix the device on an indoor plane; a negative pressure mechanism arranged on the inner wall of the shell 1, and the negative pressure mechanism is used to control multiple suction cups 15 to be adsorbed on the indoor plane; a driving mechanism arranged on the inner wall of the shell 1, and the driving mechanism is used to drive the negative pressure mechanism.

[0023] It should be noted that although the existing indoor environment detection devices can detect the indoor environment, they often need to rely on mounting structures (bolts or mounting frames) to be installed on the indoor plane. Therefore, they are often not conveniently installed on the indoor plane (walls, inner glass of windows and ceilings), and are inconvenient to disassemble.

[0024] In the scheme, a partition 2 is fixedly installed on the inner wall of the shell 1 to provide separation and support for the internal structure of the shell 1. The air inlet 3 opened on the shell 1 allows indoor air to enter the device for environmental detection. The air inlet 3 is provided with a metal screen 4 and a fan 5. The metal screen 4 plays a role in filtering and blocking large particles of impurities, while the fan 5 is responsible for inhaling air. An exhaust port 6 is also opened on the top of the shell 1 to discharge the detected air and maintain air circulation inside the device. An environmental detection mechanism is set on the partition 2, which is the core part of the device and is responsible for detecting the indoor environment, including parameters such as temperature, humidity, and air quality, to provide users with accurate Indoor environment information, in addition, an adsorption fixing mechanism is also provided on the housing 1, which utilizes the principle of the suction cup 15 to adsorb and fix the device on a flat surface in the room, such as a wall, glass, etc., thereby avoiding the inconvenience of traditional bracket installation and improving the convenience of use. In order to achieve the adsorption and fixing function, the device is also equipped with a negative pressure mechanism, which is provided on the inner wall of the housing 1, and enhances the adsorption force of the suction cup 15 by generating negative pressure, ensuring that the device can be firmly adsorbed on the indoor plane. The driving mechanism is a key component that drives the negative pressure mechanism to work, and is also provided on the inner wall of the housing 1. It can control the negative pressure mechanism as needed, thereby controlling the adsorption and release of the suction cup 15;

[0025] To sum up, the indoor environment detection device of the utility model realizes accurate detection of the indoor environment through its unique design, and has a convenient adsorption and fixing function. The environment detection mechanism provides accurate indoor environment information, and the combination of the adsorption and fixing mechanism and the negative pressure mechanism ensures that the device can be stably fixed on the indoor plane, thereby improving the convenience and stability of use.

[0026] In a further preferred embodiment of the utility model, the environmental detection mechanism includes: a circuit board 7 arranged on the partition 2 and having a dust sensor 8, a PM2.5 sensor 9, a temperature and humidity sensor 10, a carbon monoxide sensor 11 and a formaldehyde sensor 12; and a light intensity sensor 13 and a touch screen 14 arranged on the housing 1.

[0027] In this embodiment, a variety of sensors are integrated on the circuit board 7, including a dust sensor 8, a PM2.5 sensor 9, a temperature and humidity sensor 10, a carbon monoxide sensor 11 and a formaldehyde sensor 12. These sensors can respectively detect key parameters such as dust concentration, PM2.5 content, temperature, humidity, carbon monoxide concentration and formaldehyde content in the indoor air. Through the unified management and data processing of the circuit board 7, these sensors can work together to achieve comprehensive detection of the indoor environment. The light intensity sensor 13 is installed on the housing 1 to detect the light intensity in the room. This design enables the device to have a more comprehensive understanding of the indoor environmental conditions. , providing users with more accurate environmental information. The touch screen 14 is also arranged on the housing 1. As a human-computer interaction interface, it can display various data detected by the environmental detection mechanism in real time. The user can intuitively view various parameters of the indoor environment through the touch screen 14, and adjust or take corresponding measures as needed. Through this improvement, the indoor environment detection device of the utility model has higher accuracy and comprehensiveness in environmental detection. The various sensors on the circuit board 7 can work together to achieve comprehensive monitoring of the indoor environment; the addition of the light intensity sensor 13 and the touch screen 14 further enriches the function of the device and the user experience.

[0028] In a further preferred embodiment of the utility model, the adsorption and fixing mechanism includes: a plurality of suction cups 15 arranged on one side of the shell 1; a plurality of connecting tubes 16 arranged on the suction cups 15 and extending to the inside of the shell 1; and a negative pressure tube 17 arranged on the plurality of connecting tubes 16.

[0029] In this embodiment, the adsorption fixing mechanism has been improved and optimized in more detail. The mechanism mainly includes a plurality of suction cups 15 arranged on one side of the housing 1. These suction cups 15 have a strong adsorption force and can firmly adsorb the entire device on a flat surface in the room, such as a wall, glass, etc. The number and layout of the suction cups 15 are carefully designed to ensure that the device has sufficient stability and balance during adsorption. In addition to the suction cups 15, the adsorption fixing mechanism also includes a plurality of connecting pipes 16 arranged on each suction cup 15 and extending to the inside of the housing 1. These connecting pipes 16 serve to connect The function of the suction cup 15 and the negative pressure mechanism enables the negative pressure generated by the negative pressure mechanism to be transmitted to the suction cup 15, thereby enhancing its adsorption force. The design of the connecting tube 16 takes into account sealing and durability to ensure stable performance during long-term use. In addition, the adsorption fixing mechanism is also provided with a plurality of negative pressure tubes 17, which are connected to the connecting tube 16 and are responsible for transmitting the negative pressure generated by the negative pressure mechanism to the connecting tube 16 and the suction cup 15. The material and diameter of the negative pressure tube 17 are carefully selected to ensure that the negative pressure can be transmitted smoothly while reducing energy loss.

[0030] In a further preferred embodiment of the utility model, the negative pressure mechanism includes: a negative pressure cylinder 18 fixedly mounted on the inner wall of the shell 1 and connected to the negative pressure tube 17; a piston 19 slidably mounted on the inner wall of the negative pressure cylinder 18 and having a push-pull rod 20.

[0031] In this embodiment, the negative pressure mechanism is further optimized and improved. The mechanism mainly includes a negative pressure cylinder 18 fixedly mounted on the inner wall of the housing 1, and a piston 19 slidably mounted on the inner wall of the negative pressure cylinder 18. This design enables the negative pressure mechanism to generate a stable negative pressure, thereby driving the adsorption fixing mechanism to be firmly adsorbed on the indoor plane. The negative pressure cylinder 18, as the core component of the negative pressure mechanism, has sufficient strength and sealing to ensure that a stable negative pressure environment can be maintained during the movement of the piston 19. It is connected to the negative pressure tube 17, so that the generated negative pressure can be smoothly transmitted to the adsorption fixing mechanism. The piston 19 is responsible for the negative pressure cylinder. 18 generates negative pressure, it is slidably installed on the inner wall of the negative pressure cylinder 18, and is connected to the external driving mechanism through the push-pull rod 20. When the driving mechanism is working, the push-pull rod 20 will drive the piston 19 to reciprocate in the negative pressure cylinder 18, thereby generating negative pressure. Through this improvement, the indoor environment detection device of the utility model has higher efficiency and stability in generating negative pressure. The coordinated use of the negative pressure cylinder 18 and the piston 19 can generate a sufficiently large negative pressure, so that the adsorption fixing mechanism can be firmly adsorbed on the indoor plane. At the same time, due to the use of a mechanical piston movement method, the negative pressure mechanism also has higher reliability and durability.

[0032] In a further preferred embodiment of the utility model, the driving mechanism includes: a servo motor 21 fixedly mounted on the inner wall of the outer shell 1; a screw rod 22 fixedly mounted on the output shaft of the servo motor 21 and rotatably connected to the inner wall of the outer shell 1; and a sliding plate 24 threadedly sleeved on the screw rod 22 and fixedly connected to the push-pull rod 20.

[0033] In the present embodiment, the design of the driving mechanism has been further improved and optimized. The mechanism mainly includes a servo motor 21 fixedly mounted on the inner wall of the shell 1, and a screw 22 fixedly mounted on the output shaft of the servo motor 21. This design enables the driving mechanism to stably and efficiently drive the negative pressure mechanism to work, thereby realizing precise control of the adsorption fixing mechanism. The servo motor 21, as the power source of the driving mechanism, has the characteristics of high precision and high response speed. By accurately controlling the speed and direction of the servo motor 21, the screw 22 can be accurately driven, thereby controlling the reciprocating motion of the sliding plate 24. The screw 22 is responsible for converting the rotational motion of the servo motor 21 into linear motion. It is fixedly mounted on the output shaft of the servo motor 21 and is connected to the inner wall of the shell 1 for rotation. To ensure stability during rotation, the sliding plate 24 is a connecting component between the driving mechanism and the negative pressure mechanism, which is threadedly sleeved on the screw 22 and fixedly connected to the push-pull rod 20. When the screw 22 rotates, the sliding plate 24 will reciprocate on the screw 22, thereby driving the push-pull rod 20 and the piston 19 to move together. This mechanical transmission method has the advantages of simple structure and high reliability. Through this improvement, the indoor environment detection device of the utility model has higher precision and stability in the driving mechanism. The coordinated use of the servo motor 21 and the screw 22 can achieve precise control of the sliding plate 24 and the push-pull rod 20, thereby ensuring that the negative pressure mechanism can generate stable negative pressure according to preset requirements, which helps to improve the adsorption and fixing effect and service life of the device.

[0034] In a further preferred embodiment of the present invention, a limiting rod 23 is fixedly mounted on the inner wall of the housing 1 , and the limiting rod 23 is slidably connected to the sliding plate 24 .

[0035] In this embodiment, a limit rod 23 is additionally provided on the inner wall of the housing 1, and the limit rod 23 is slidably connected to the sliding plate 24. This design is intended to further improve the stability and reliability of the driving mechanism. The main function of the limit rod 23 is to limit and guide the movement trajectory of the sliding plate 24. When the servo motor 21 drives the screw rod 22 to rotate, the sliding plate 24 reciprocates under the action of the thread of the screw rod 22, and the existence of the limit rod 23 ensures that the sliding plate 24 always moves along the predetermined trajectory, avoiding it from deviating from the track or shaking, thereby improving the stability of the entire driving mechanism. In addition, the limit rod The sliding connection design between 23 and the sliding plate 24 also enhances the connection strength and durability between the two. This sliding connection method enables the sliding plate 24 to slide smoothly along the limit rod 23 during movement, reduces friction and resistance, and improves the efficiency of the driving mechanism. By adding a limit rod 23 and designing a sliding connection for the sliding plate 24, the indoor environment detection device of the utility model achieves higher stability and reliability in the driving mechanism, which not only helps to improve the adsorption and fixing effect of the device, but also prolongs the service life of the device, providing users with a more stable and reliable environmental detection solution.

[0036] In a further preferred embodiment of the present invention, a lithium battery 25 is disposed on the inner wall of the housing 1 , and the lithium battery 25 is electrically connected to the circuit board 7 .

[0037] In this embodiment, a lithium battery 25 is added to the inner wall of the shell 1, and the lithium battery 25 is electrically connected to the circuit board 7. This design provides the device with portability and self-powered capabilities, so that the indoor environment detection device can work independently without an external power supply. As a highly efficient and lightweight energy supply device, the lithium battery 25 provides continuous and stable power support for the device. Through the electrical connection with the circuit board 7, the lithium battery 25 can provide necessary power for the environment detection mechanism, the adsorption and fixing mechanism, the negative pressure mechanism and the driving mechanism, etc., to ensure the normal operation of the device. This self-powered design makes the indoor environment detection device more portable and flexible, and environmental detection can be performed anytime and anywhere. Users do not need to worry about power supply problems. They only need to place the device at the location where detection is required to start working. This greatly improves the ease of use and application scope of the device. At the same time, the addition of the lithium battery 25 also makes the device more environmentally friendly and energy-saving. Compared with traditional devices that use external power supplies, the self-powered design reduces energy consumption and carbon emissions, which is in line with the green and low-carbon development concept of modern society.

[0038] In a further preferred embodiment of the utility model, a charging interface 26 is provided at the bottom of the shell 1, and the charging interface 26 is electrically connected to the lithium battery 25. A photovoltaic panel 27 is provided on one side of the shell 1, and the photovoltaic panel 27 is electrically connected to the lithium battery 25.

[0039] In this embodiment, an external charging cable can be connected through the charging interface 26 to charge the lithium battery 25. When the device is adsorbed and fixed on the inner glass of the window, sunlight shines through the glass onto the photovoltaic panel 27, and the lithium battery 25 can be charged through the photovoltaic panel 27, thereby improving the battery life of the device.

[0040] In summary, in the present invention, the indoor environment can be monitored through the environment detection mechanism, and the device can be conveniently installed on an indoor plane through the adsorption fixing mechanism, and the device can be conveniently disassembled.

[0041] Compared with the related art, in this solution, the fan 5 can allow the airflow to quickly enter the interior of the shell 1, and the environmental detection mechanism can detect multiple indicators such as indoor dust, PM2.5, temperature and humidity, carbon monoxide, light intensity and formaldehyde. The adsorption and fixing mechanism can conveniently install the device on an indoor plane, and make the disassembly of the device more convenient.

[0042] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0043] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. An indoor environment detection device, characterized in that: include: A housing (1) having a partition (2) fixedly mounted on the inner wall; An air inlet (3) provided on the housing (1); A metal screen (4) and a fan (5) arranged on the air inlet (3); An air outlet (6) is provided on the top of the housing (1); An environment detection mechanism is arranged on the partition (2), and is used to detect the indoor environment; An adsorption fixing mechanism installed on the shell (1), the adsorption fixing mechanism is used to adsorb and fix the device on a plane indoors, the adsorption fixing mechanism comprising: a plurality of suction cups (15) arranged on one side of the shell (1); a plurality of connecting pipes (16) arranged on the suction cups (15) and extending into the interior of the shell (1); and a negative pressure pipe (17) arranged on the plurality of connecting pipes (16); A negative pressure mechanism is arranged on the inner wall of the shell (1), and is used to control a plurality of suction cups (15) to be adsorbed on a plane in the room. The negative pressure mechanism comprises: a negative pressure cylinder (18) fixedly mounted on the inner wall of the shell (1) and connected to the negative pressure tube (17); a piston (19) slidably mounted on the inner wall of the negative pressure cylinder (18) and having a push-pull rod (20); A driving mechanism is arranged on the inner wall of the housing (1), the driving mechanism is used to drive the negative pressure mechanism, and the driving mechanism comprises: a servo motor (21) fixedly mounted on the inner wall of the housing (1); a screw rod (22) fixedly mounted on the output shaft of the servo motor (21) and rotatably connected to the inner wall of the housing (1); a sliding plate (24) threadedly sleeved on the screw rod (22) and fixedly connected to the push-pull rod (20); A limiting rod (23) is fixedly mounted on the inner wall of the housing (1), and the limiting rod (23) is slidably connected to the sliding plate (24).

2. The indoor environment detection device according to claim 1, characterized in that: The environmental monitoring mechanism includes: A circuit board (7) disposed on the partition (2) and having a dust sensor (8), a PM2.5 sensor (9), a temperature and humidity sensor (10), a carbon monoxide sensor (11) and a formaldehyde sensor (12); A light intensity sensor (13) and a touch screen (14) are arranged on the housing (1).

3. The indoor environment detection device according to claim 2, characterized in that: A lithium battery (25) is arranged on the inner wall of the housing (1), and the lithium battery (25) is electrically connected to the circuit board (7).

4. The indoor environment detection device according to claim 3, characterized in that: A charging interface (26) is provided at the bottom of the housing (1), and the charging interface (26) is electrically connected to the lithium battery (25). A photovoltaic panel (27) is provided on one side of the housing (1), and the photovoltaic panel (27) is electrically connected to the lithium battery (25).

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