Wind wheel and fan

Abstract

The present application relates to the technical field of household appliances, and discloses a wind wheel and a fan, the wind wheel comprising: a middle shaft; a plurality of wind blades arranged along the circumference of the middle shaft, the first end of the wind blade being connected with the middle shaft, the second end being suspended, and the wind blade being curved towards the direction of rotation from the first end to the second end. In use, the middle shaft is vertically arranged, and when the middle shaft rotates under the drive of the motor, 360° horizontal air outlet can be realized. Since the first end of the wind blade is connected with the middle shaft, the second end is suspended, and the wind blade is curved towards the direction of rotation from the first end to the second end, the wind blade can scoop up air and throw it outwards when rotating, can more agilely agitate air, and the air flow efficiency is higher, and the air volume is larger.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, specifically to impellers and fans. Background Technology

[0002] In related technologies, the air outlet method of the fan is to use a vortex impeller to blow air from one side to the other. Although it can oscillate, it is difficult to achieve 360° horizontal air outlet.

[0003] Tower fans in related technologies can achieve 360° horizontal airflow, but the impeller blades of tower fans are mostly straight plates, resulting in low airflow efficiency and low air volume. Summary of the Invention

[0004] In view of this, the present invention provides a wind turbine and a fan to solve the problem of low airflow efficiency in related technologies.

[0005] In a first aspect, the present invention provides a wind turbine, comprising:

[0006] Central axis;

[0007] The fan blades are provided in multiple circumferential directions along the central axis. The first end of the fan blade is connected to the central axis, the second end is suspended, and the fan blade bends in the direction of rotation from the first end to the second end.

[0008] Beneficial effects: When in use, the central shaft is set vertically. When the central shaft rotates under the drive of the motor, it can achieve 360° horizontal air outlet. Since the first end of the fan blade is connected to the central shaft and the second end is suspended, and the fan blade bends in the direction of rotation from the first end to the second end, it can catch the air and throw it outward when rotating, which can more flexibly agitate the air, making the air flow efficiency higher and the air volume greater.

[0009] In one alternative embodiment, the first end of the fan blade extends in a direction parallel to the axis of the central axis.

[0010] Beneficial effect: Since the first end of the fan blade extends in a direction parallel to the axis of the central axis, horizontal airflow can be ensured.

[0011] In one alternative implementation, the width of the fan blade first increases and then decreases along the axial direction of the central axis.

[0012] Beneficial effects: Along the central axis, the width of the blades first increases and then decreases, and the overall shape of the impeller is that of an oval, wide in the middle and pointed at both ends. When rotating, it can more flexibly agitate the air in the middle, making the airflow more efficient. Compared with the straight blades in related technologies, the blades are wider and have a larger air volume.

[0013] In one alternative implementation, the thickness of the fan blade first increases and then decreases from the first end to the second end.

[0014] Beneficial effects: By increasing the thickness of the fan blade from the first end to the second end and then decreasing it, it is easier to bend the fan blade, and the friction between the edge of the fan blade and the air is less, thus reducing wind resistance.

[0015] In one alternative embodiment, the wind turbine further includes a central support, and a plurality of the wind blades are fixed to the central support near the central axis.

[0016] Beneficial effect: The central support can improve the overall structural strength of the wind turbine.

[0017] In one alternative embodiment, the central support includes at least one rib that surrounds the central axis.

[0018] Beneficial effects: The central support includes at least one rib. The rib occupies less space, which can reduce the obstruction to airflow and help reduce the overall weight of the wind turbine.

[0019] Secondly, the present invention also provides a fan, comprising:

[0020] The wind turbine, wherein the central shaft is vertically arranged:

[0021] A protective cover is provided on the outside of the wind turbine;

[0022] The motor is located inside the protective cover and is connected to the first end of the central shaft to drive the central shaft to rotate.

[0023] Beneficial effects: When the fan is working, the central shaft rotates under the drive of the motor, achieving 360° horizontal airflow. Because the first end of the fan blades is connected to the central shaft, while the second end is suspended, and the blades bend in the direction of rotation from the first to the second end, they can scoop up air and throw it outwards during rotation, resulting in more agile airflow, higher air circulation efficiency, and a larger air volume. The protective cover prevents users from touching the rotating blades, enhancing safety.

[0024] In one alternative embodiment, a bearing is provided between the second end of the central shaft and the protective cover.

[0025] Beneficial effect: The bearing configuration allows the impeller to rotate smoothly and at high speed within the protective cover.

[0026] In one alternative implementation, the fan further includes:

[0027] A wet curtain surrounds the outside of the impeller and is located inside the protective cover;

[0028] A water tank is located at the bottom of the protective cover;

[0029] An annular water trough is provided at the top of the wet curtain, and the annular water trough is provided with multiple drainage holes, which face the wet curtain.

[0030] The water supply structure is used to deliver water from the water tank to the annular water trough.

[0031] Beneficial effects: The water supply structure can send water from the water tank to the annular water trough. The water in the annular water trough flows to the wet curtain through the drain hole, humidifying the wet curtain. Since the wet curtain is wrapped around the outside of the fan wheel, the air carries moisture when it passes through the wet curtain. Therefore, the blown air contains moisture, which can play a role in humidification and cooling after evaporation.

[0032] In one alternative embodiment, the fan further includes a plurality of sealing elements, each corresponding to one of the drain holes, and the sealing elements are adapted to block the drain holes or leave the drain holes.

[0033] Beneficial effects: By setting up a sealing component, the sealing component can block or move away from the drain hole. Depending on the needs, some drain holes can be blocked so that only the drain hole above the wet curtain on the side facing the user is not blocked. The wet curtain on that side is humidified. When air blows towards the user, the air passes through the wet curtain on that side, making the air blown towards the user cool air and not wasting water.

[0034] In one specific embodiment, the sealing element is made of silicone.

[0035] In one specific embodiment, the sealing element is cylindrical.

[0036] In one alternative embodiment, the fan further includes a drive structure for driving the sealing element to block or move away from the drain hole.

[0037] Beneficial effects: The drive structure can drive the sealing component to block or move away from the drain hole. Users only need to operate the drive structure to control the sealing component to block or move away from the drain hole, making it more convenient for users to use.

[0038] In one optional embodiment, the annular water tank includes multiple quadrant regions, each quadrant region having at least one drain hole, and a drive structure capable of controlling all sealing elements within the same quadrant region to simultaneously seal or leave the drain hole.

[0039] Beneficial effects: Dividing the annular water tank into multiple quadrant areas allows a single drive structure to control all sealing components within the same quadrant area to simultaneously seal or leave the drain hole, making it easier to control each sealing component. It also reduces the number of drive structures and avoids complex fan structures.

[0040] Specifically, when a user stands in front of a quadrant area, they can control the drive structure of that quadrant area to work, causing the blocking components in that quadrant area to simultaneously leave the drain holes. Water in the annular water tank can flow through the drain holes in that quadrant area to the wet curtain, humidifying the wet curtain on that side. The air blown out from that side is cold air. The blocking components in the other quadrant areas block the corresponding drain holes, and the air blown out from the other sides does not carry moisture.

[0041] In one optional embodiment, the driving structure includes an electromagnetic lock disposed above a plurality of sealing elements in each quadrant region. When the electromagnetic lock is supplied with current in a first direction, it drives the sealing elements to block the drain hole. When the electromagnetic lock is supplied with current in a second direction, it drives the sealing elements to move away from the drain hole.

[0042] Beneficial effects: When a user stands in front of a quadrant area, a second-direction current can be supplied to the electromagnetic lock of that quadrant area, driving multiple sealing components in that quadrant area to simultaneously leave the drain hole. Water in the annular water tank can flow through the drain hole in that quadrant area to the wet curtain, humidifying the wet curtain on that side. The air blown out from that side is cold air. A first-direction current is supplied to the electromagnetic locks in the other quadrant areas, causing the sealing components in the remaining quadrant areas to block the corresponding drain holes. The air blown out from the other sides does not carry moisture.

[0043] In one optional embodiment, the protective cover is provided with an infrared sensor for each quadrant region, and the fan further includes a controller. The controller is communicatively connected to the infrared sensor and the drive structure, and is able to control the drive structure in the corresponding quadrant region to operate when one of the infrared sensors detects preset information, so that the sealing element in the corresponding quadrant region moves away from the drain hole, and control the drive structure in the remaining quadrant regions to operate so that the sealing element in the remaining quadrant regions blocks the drain hole.

[0044] Beneficial effects: By setting up an infrared sensor, when the infrared sensor detects preset information, the controller automatically controls the drive structure in the corresponding quadrant area to work so that the sealing component in the corresponding quadrant area moves away from the drain hole. Water in the annular water tank can flow through the drain hole in that quadrant area to the wet curtain, humidifying the wet curtain on that side. The air blown out from that side is cold air. The controller controls the drive structure in the other quadrant areas to work so that the sealing component in the other quadrant areas blocks the drain hole. Water will not flow downward to the wet curtain in the other quadrant areas, making it more intelligent. Attached Figure Description

[0045] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of a fan without a wet curtain according to an embodiment of the present invention;

[0047] Figure 2 for Figure 1 The fan shown is shown in a top sectional view.

[0048] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0049] Figure 4 This is a schematic diagram of a fan equipped with a wet curtain according to an embodiment of the present invention;

[0050] Figure 5 for Figure 4 A magnified view of part B in the diagram.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1. Central shaft; 2. Fan blade; 3. Central support; 301. Rib; 4. Protective cover; 5. Motor; 6. Bearing; 7. Evaporative cooling pad; 8. Water tank; 9. Annular water trough; 901. Drain hole; 902. Quadrant area; 10. Sealing component; 11. Water pump; 12. Infrared sensor. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] In related technologies, the air outlet method of the fan is to use a vortex impeller to blow air from one side to the other. Although it can oscillate, it is difficult to achieve 360° horizontal air outlet.

[0055] Tower fans in related technologies can achieve 360° horizontal airflow, but the impeller blades of tower fans are mostly straight plates, resulting in low airflow efficiency and low air volume.

[0056] The following is combined Figures 1 to 4The following describes embodiments of the present invention.

[0057] According to an embodiment of the present invention, in one aspect, a wind turbine is provided, including a central shaft 1 and wind blades 2. Multiple wind blades 2 are provided along the circumference of the central shaft 1, a first end of the wind blade 2 is connected to the central shaft 1, a second end is suspended, and from the first end to the second end, the wind blade 2 is bent in its rotational direction.

[0058] In this embodiment, when in use, the central shaft 1 is set vertically. When the central shaft 1 rotates under the drive of the motor 5, it can achieve 360° horizontal air outlet. Since the first end of the fan blade 2 is connected to the central shaft 1 and the second end is suspended, and the fan blade 2 bends in the direction of rotation from the first end to the second end, it can catch the air and throw it outward when rotating, which can more flexibly stir the air, making the air flow efficiency higher and the air volume larger.

[0059] In one embodiment, the first end of the fan blade 2 extends in a direction parallel to the axis of the central shaft 1.

[0060] In this embodiment, since the first end of the fan blade 2 extends in a direction parallel to the axis of the central shaft 1, horizontal airflow can be ensured.

[0061] In an alternative embodiment, the first end of the fan blade 2 may be spirally disposed on the outer surface of the central shaft 1.

[0062] In one embodiment, the width of the fan blade 2 first increases and then decreases along the axial direction of the central axis 1.

[0063] In this embodiment, along the axial direction of the central axis 1, the width of the fan blade 2 first increases and then decreases, combined with... Figure 1 The wind turbine is shaped like a rugby ball, wide in the middle and pointed at both ends. When it rotates, it can more flexibly agitate the air in the middle, making the airflow more efficient. Compared with the straight blade 2 in related technologies, the blade 2 is wider and has a larger air volume.

[0064] It should be noted that the width of the fan blade 2 specifically refers to the distance between the outer edge of the fan blade 2 and the central axis 1.

[0065] In one embodiment, such as Figure 2 As shown, from the first end to the second end of the fan blade 2, the thickness of the fan blade 2 first increases and then decreases.

[0066] In this embodiment, by increasing the thickness of the wind blade 2 from the first end to the second end and then decreasing it, it is easier to bend the wind blade 2, and the friction between the edge of the wind blade 2 and the air is smaller, thus reducing wind resistance.

[0067] In one embodiment, further reference Figure 2 and Figure 3The wind turbine also includes a central support 3, and multiple wind blades 2 are fixed to the central support 3 near the central shaft 1.

[0068] In this embodiment, the central support 3 can improve the overall structural strength of the wind turbine.

[0069] In one embodiment, the central support 3 includes at least one rib 301 that surrounds the central axis 1.

[0070] In this embodiment, the central support 3 includes at least one rib 301. The rib 301 occupies a small space, which can reduce the obstruction to airflow and at the same time help to reduce the overall weight of the wind turbine.

[0071] Specifically, such as Figure 3 As shown, the reinforcing bar 301 is circular.

[0072] In one embodiment not shown in the figure, the rib 301 may be a polygon.

[0073] Specifically, such as Figure 3 As shown, there are three circular ribs 301.

[0074] It should be noted that this embodiment does not limit the shape, number, and diameter of the reinforcing bars 301, which can be determined experimentally according to the requirements of wind speed and air volume.

[0075] According to an embodiment of the present invention, in another aspect, a fan is provided, including the impeller, protective cover 4 and motor 5 provided in the above embodiments.

[0076] The wind turbine's central shaft 1 is vertically arranged; the protective cover 4 is located on the outside of the wind turbine; the motor 5 is located inside the protective cover 4, and the motor 5 is connected to the first end of the central shaft 1 to drive the central shaft 1 to rotate.

[0077] In this embodiment, when the fan is working, the central shaft 1 rotates under the drive of the motor 5, achieving 360° horizontal airflow. Since the first end of the fan blade 2 is connected to the central shaft 1, and the second end is suspended, and the fan blade 2 bends in the direction of rotation from the first end to the second end, it can scoop up air and throw it outwards during rotation, thus more flexibly agitating the air, resulting in higher airflow efficiency and a larger air volume. The protective cover 4 prevents the user from touching the rotating fan blade 2, enhancing safety.

[0078] It should be noted that the fan can be a table fan or a tower fan. When it is a table fan, the height of the impeller is lower, and when it is a tower fan, the height of the impeller is higher, to meet the needs of users.

[0079] In one embodiment, a bearing 6 is provided between the second end of the central shaft 1 and the protective cover 4.

[0080] In this embodiment, the bearing 6 is provided so that the impeller can rotate smoothly and at high speed within the protective cover 4.

[0081] Specifically in one embodiment, such as Figure 1 As shown, the motor 5 is located at the upper end of the central shaft 1, and the bearing 6 is located between the lower end of the bearing 6 and the protective cover 4.

[0082] In an alternative embodiment, the motor 5 can be positioned at the lower end of the central shaft 1, and the bearing 6 can be positioned between the upper end of the bearing 6 and the protective cover 4.

[0083] In one embodiment, such as Figure 4 As shown, the fan also includes an evaporative cooling pad 7, a water tank 8, an annular water trough 9, and a water supply structure. The evaporative cooling pad 7 surrounds the outside of the impeller and is located inside the protective cover 4; the water tank 8 is located at the bottom of the protective cover 4; the annular water trough 9 is located at the top of the evaporative cooling pad 7 and has multiple drainage holes 901 facing the evaporative cooling pad 7; the water supply structure is used to deliver water from the water tank 8 to the annular water trough 9.

[0084] In this embodiment, the water supply structure can send water from the water tank 8 to the annular water tank 9. The water in the annular water tank 9 flows to the wet curtain 7 through the drain hole 901 to humidify the wet curtain 7. Since the wet curtain 7 is wrapped around the outside of the fan wheel, the air will carry moisture when it passes through the wet curtain 7. Therefore, the blown air carries moisture, which can play a role in humidification and cooling after evaporation.

[0085] Specifically, the water tank 8 is located below the wet curtain 7, and the water falling from the wet curtain 7 can flow back into the water tank 8 for reuse.

[0086] Specifically, the water supply structure includes a water pump 11 installed in the water tank 8 and a water supply pipe (not shown in the figure) connected to the outlet of the water pump 11. When the water pump 11 is working, it can transport the water in the water tank 8 to the annular water tank 9 through the water supply pipe.

[0087] In one embodiment, such as Figure 5 As shown, the fan also includes multiple sealing components 10, each of which corresponds to a drain hole 901. The sealing component 10 is adapted to block the drain hole 901 or leave the drain hole 901.

[0088] In this embodiment, by providing a sealing member 10, the sealing member 10 can block the drain hole 901 or leave the drain hole 901. Depending on the needs, some drain holes 901 can be blocked so that only the drain hole 901 above the wet curtain 7 on the side facing the user is not blocked. The wet curtain 7 on that side is humidified. When air blows towards the user, the air passes through the wet curtain 7 on that side, making the wind blowing towards the user cold air and not wasting water.

[0089] In one embodiment, the fan further includes a drive structure for driving the sealing member 10 to block or move away from the drain hole 901.

[0090] In this embodiment, the drive structure can drive the sealing member 10 to block or move away from the drain hole 901. The user only needs to operate the drive structure to control the sealing member 10 to block or move away from the drain hole 901, which is more convenient for the user.

[0091] In one embodiment, the annular water tank 9 includes multiple quadrant regions 902, each quadrant region 902 is provided with at least one drain hole 901, and a drive structure can control all the sealing elements 10 in the same quadrant region 902 to simultaneously block or leave the drain hole 901.

[0092] In this embodiment, the annular water tank 9 is divided into multiple quadrant regions 902. One drive structure can control all the sealing parts 10 in the same quadrant region 902 to simultaneously block or leave the drain hole 901, which makes it easier to control each sealing part 10 and also reduces the number of drive structures, avoiding complex fan structures.

[0093] Specifically, when a user stands in front of a quadrant 902, the drive structure of that quadrant 902 can be controlled to operate, causing the sealing element 10 in that quadrant 902 to simultaneously leave the drain hole 901. Water in the annular water tank 9 can flow through the drain hole 901 in that quadrant 902 to the wet curtain 7, humidifying the wet curtain 7 on that side. The air blown out from that side is cold air. The sealing elements 10 in the other quadrants 902 block the corresponding drain holes 901, and the air blown out from the other sides does not carry moisture.

[0094] In an alternative embodiment, each sealing element 10 can be connected to a drive structure. When a user stands in front of a quadrant region 902, the various drive structures in that quadrant region 902 can be controlled to work simultaneously, so that the sealing elements 10 in that quadrant region 902 are all away from the drain holes 901. The water in the annular water tank 9 can flow through the drain holes 901 in that quadrant region 902 to the wet curtain 7, humidifying the wet curtain 7 on that side. The air blown out from that side is cold air. The sealing elements 10 in the other quadrant regions 902 block the corresponding drain holes 901, and the air blown out from the other sides does not carry moisture.

[0095] In one specific embodiment, each quadrant region 902 is provided with multiple drain holes 901, and a driving structure can control multiple sealing elements 10 in the same quadrant region 902 to simultaneously seal or leave the drain holes 901.

[0096] Specifically, such as Figure 5As shown, the system is divided into four quadrant regions 902. Each quadrant region 902 has three drain holes 901 and three sealing components 10. When a user stands in front of a quadrant region 902, they can control the drive structure of that quadrant region 902 to operate, causing the three sealing components 10 in that quadrant region 902 to simultaneously leave the drain holes 901. Water in the annular water tank 9 can then flow through the drain holes 901 in that quadrant region 902 to the wet curtain 7, humidifying the wet curtain 7 on that side. The air blown out from that side is cold air. The sealing components 10 in the other quadrant regions 902 block the corresponding drain holes 901, and the air blown out from the other sides does not carry moisture.

[0097] In one embodiment, the driving structure includes an electromagnetic lock disposed above each sealing member 10 in each quadrant region 902. When the electromagnetic lock is supplied with current in a first direction, it drives the sealing member 10 to block the drain hole 901. When the electromagnetic lock is supplied with current in a second direction, it drives the sealing member 10 to leave the drain hole 901.

[0098] In this embodiment, when a user stands in front of a quadrant region 902, a second-direction current can be supplied to the electromagnetic lock of the quadrant region 902, driving multiple sealing elements 10 in the quadrant region 902 to simultaneously leave the drain hole 901. Water in the annular water tank 9 can flow through the drain hole 901 in the quadrant region 902 to the wet curtain 7, humidifying the wet curtain 7 on that side. The air blown out from that side is cold air. A first-direction current is supplied to the electromagnetic locks in the other quadrant regions 902, causing the sealing elements 10 in the remaining quadrant regions 902 to block the corresponding drain holes 901. The air blown out from the other sides does not carry moisture.

[0099] It should be noted that the movement of each sealing component 10 is limited by the drain hole 901 and the electromagnetic lock. For example, when it is necessary to move the sealing component 10 in a certain quadrant region 902 away from the drain hole 901, if the sealing component 10 is already in a position away from the drain hole 901, even if a current in the second direction is applied to the electromagnetic lock in that quadrant region 902, the sealing component 10 will not continue to move. Similarly, for example, when it is necessary to block the drain hole 901 with the sealing component 10 in a certain quadrant region 902, if the sealing component 10 is already blocked in the drain hole 901, even if a current in the first direction is applied to the electromagnetic lock in that quadrant region 902, the sealing component 10 will not continue to move downward.

[0100] Specifically, the electromagnetic lock may include a magnet fixed to the top of the sealing member 10, that is, an electromagnet spaced above the magnet. When a current in the first direction is applied to the electromagnet, the lower end of the electromagnet and the upper end of the magnet have the same magnetic polarity, generating a repulsive force and driving the sealing member 10 to move downward. When a current in the second direction is applied to the electromagnet, the lower end of the electromagnet and the upper end of the magnet have opposite magnetic polarities, generating an attractive force and driving the sealing member 10 to move upward.

[0101] In an alternative embodiment, the drive structure may include a cylinder, the end of which is connected to a plurality of plugs 10 within the quadrant region 902.

[0102] In one embodiment, the protective cover 4 is provided with an infrared sensor 12 for each quadrant region 902. The fan also includes a controller, which is communicatively connected to the infrared sensor 12 and the drive structure. When one of the infrared sensors 12 detects preset information, the controller can control the drive structure in the corresponding quadrant region 902 to work so that the sealing member 10 in the corresponding quadrant region 902 leaves the drain hole 901, and control the drive structure in the remaining quadrant regions 902 to work so that the sealing member 10 in the remaining quadrant regions 902 blocks the drain hole 901.

[0103] In this embodiment, by setting an infrared sensor 12, when the infrared sensor 12 detects preset information, the controller automatically controls the drive structure in the corresponding quadrant area 902 to work so that the sealing member 10 in the corresponding quadrant area 902 leaves the drain hole 901. The water in the annular water tank 9 can flow to the wet curtain 7 through the drain hole 901 in the quadrant area 902, humidifying the wet curtain 7 on that side. The air blown out from that side is cold air. The controller controls the drive structure in the other quadrant areas 902 to work so that the sealing member 10 in the other quadrant areas 902 blocks the drain hole 901. No water will flow down to the wet curtain 7 in the other quadrant areas 902, making it more intelligent.

[0104] In one specific embodiment, the preset information is a preset temperature, such as greater than 25°C, or the detection of a concentrated heat source.

[0105] In one specific embodiment, there are four quadrant regions 902, namely the first region, the second region, the third region, and the fourth region. Correspondingly, there are four infrared sensors 12. When the infrared sensor 12 corresponding to the first region detects preset information, the controller automatically controls the drive structure in the first region to work so that the sealing member 10 in the first region leaves the drain hole 901. The water in the annular water tank 9 can flow through the drain hole 901 in the first region to the wet curtain 7, humidifying the wet curtain 7 on the lower side of the first region. The air blown out from this side is cold air. The controller controls the drive structure in the second, third, and fourth regions to work so that the sealing member 10 in the second, third, and fourth regions blocks the drain hole 901. No water will flow downward to the wet curtain 7 in the second, third, and fourth regions.

[0106] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A fan, characterized in that, include: The wind turbine includes: a central shaft (1) which is vertically arranged; and multiple wind blades (2) arranged around the central shaft (1). The first end of each wind blade (2) is connected to the central shaft (1), and the second end is suspended. From the first end to the second end, the wind blade (2) is bent in the direction of rotation. A protective cover (4) is provided on the outside of the wind turbine; A motor (5) is located inside the protective cover (4), and the motor (5) is connected to the first end of the central shaft (1) to drive the central shaft (1) to rotate; the fan also includes: A wet curtain (7) surrounds the outside of the wind turbine and is located inside the protective cover (4); A water tank (8) is located at the bottom of the protective cover (4); An annular water trough (9) is provided on the top of the wet curtain (7). The annular water trough (9) is provided with a plurality of drain holes (901), which face the wet curtain (7). The water supply structure is used to deliver water from the water tank (8) to the annular water trough (9); The fan also includes multiple sealing elements (10), each sealing element (10) corresponding to a drain hole (901), and the sealing element (10) is adapted to block the drain hole (901) or leave the drain hole (901); the fan also includes a drive structure, which is used to drive the sealing elements (10) to block or leave the drain hole (901). The annular water tank (9) includes multiple quadrant regions (902), each quadrant region (902) is provided with at least one drain hole (901), and a drive structure can control all sealing elements (10) in the same quadrant region (902) to simultaneously block or leave the drain hole. (901) The protective cover (4) is provided with an infrared sensor (12) for each quadrant area (902). The fan also includes a controller. The controller is communicatively connected to the infrared sensor (12) and the drive structure. When one of the infrared sensors (12) detects preset information, it can control the drive structure in the corresponding quadrant area (902) to work so that the sealing part (10) in the corresponding quadrant area (902) leaves the drain hole (901), and control the drive structure in the other quadrant areas (902) to work so that the sealing part (10) in the other quadrant areas (902) blocks the drain hole (901).

2. The fan according to claim 1, characterized in that, The first end of the fan blade (2) extends in a direction parallel to the axis of the central shaft (1).

3. The fan according to claim 2, characterized in that, Along the axial direction of the central axis (1), the width of the fan blade (2) first increases and then decreases.

4. The fan according to any one of claims 1 to 3, characterized in that, From the first end to the second end of the fan blade (2), the thickness of the fan blade (2) first increases and then decreases.

5. The fan according to any one of claims 1 to 3, characterized in that, The wind turbine also includes a central support (3), and multiple wind blades (2) are fixed to the central support (3) near the central shaft (1).

6. The fan according to claim 5, characterized in that, The central support (3) includes at least one rib (301) that surrounds the central axis (1).

7. The fan according to claim 1, characterized in that, A bearing (6) is provided between the second end of the central shaft (1) and the protective cover (4).

8. The fan according to claim 1, characterized in that, The drive structure includes an electromagnetic lock above a plurality of sealing elements (10) disposed in each quadrant region (902). When the electromagnetic lock is supplied with current in a first direction, it drives the sealing element (10) to block the drain hole (901). When the electromagnetic lock is supplied with current in a second direction, it drives the sealing element (10) to leave the drain hole (901).

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