Wind wheel and fan

Abstract

The invention relates to the technical field of household appliances, and discloses a wind wheel and a fan. The multiple fan blades are arranged in the circumferential direction of the middle shaft, the first ends of the fan blades are connected with the middle shaft, the second ends of the fan blades are suspended, and the fan blades are bent in the rotating direction of the fan blades from the first ends to the second ends. When the fan is used, the middle shaft is vertically arranged, 360-degree horizontal air outlet can be achieved when the middle shaft is driven by the motor to rotate, due to the fact that the first ends of the fan blades are connected with the middle shaft, the second ends of the fan blades are suspended, and the fan blades are bent in the rotating direction from the first ends to the second ends, the fan blades can hold air and throw the air out in the rotating process, and the fan blades are prevented from falling off. Air can be stirred more flexibly, the air flowing efficiency is higher, and the air volume is larger.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a wind wheel and a fan. Background Art

[0002] In the related art, the fan uses a vortex wind wheel to blow air from one side to the other. Although the fan can shake its head, it is difficult to achieve 360° horizontal air discharge.

[0003] The tower fan in the related art can achieve 360° horizontal air outlet, but the wind wheel blades of the tower fan are mostly straight plate-shaped, resulting in low air flow efficiency and low air volume. Summary of the invention

[0004] In view of this, the present invention provides a wind wheel and a fan to solve the problem of low air flow efficiency of the fan in the related art.

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

[0006] Central axis;

[0007] A plurality of fan blades are arranged along the circumference of the central axis, wherein the first end of the fan blade is connected to the central axis, the second end is suspended in the air, and the fan blade is bent toward its rotation direction from the first end to the second end.

[0008] Beneficial effects: When in use, the central axis is set vertically. When the central axis rotates under the drive of the motor, 360° horizontal air outlet can be achieved. Since the first end of the fan blade is connected to the central axis, the second end is suspended in the air, and from the first end to the second end, the fan blade is bent toward its rotation direction, it can encircle the air and throw it out when rotating, which can stir the air more flexibly, making the air flow more efficient and the air volume larger.

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

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

[0011] In an optional embodiment, along the axial direction of the central axis, the width of the fan blade increases first and then decreases.

[0012] Beneficial effect: along the axial direction of the central axis, the width of the fan blade increases first and then decreases. The wind wheel is in the shape of an American football as a whole, which is wide in the middle and pointed at both ends. When rotating, it can stir the air in the middle more flexibly, making the air flow more efficient. Compared with the straight-plate fan blades in the related technology, the fan blades are wider and have a larger air volume.

[0013] In an optional embodiment, the thickness of the fan blade increases first and then decreases from the first end to the second end of the fan blade.

[0014] Beneficial effect: By increasing the thickness of the fan blade first and then decreasing from the first end to the second end of the fan blade, the fan blade can be bent more easily, and the friction between the edge of the fan blade and the air is smaller, thereby reducing wind resistance.

[0015] In an optional embodiment, the wind wheel further includes a central support, and the plurality of wind blades are fixed to the central support at positions close to the central axis.

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

[0017] In an optional embodiment, the central support includes at least one rib, and the rib surrounds the central axis.

[0018] Beneficial effects: The central support includes at least one rib, which occupies a small space, can reduce the obstruction to the air flow, and is conducive to reducing the overall weight of the wind wheel.

[0019] In a second aspect, the present invention further provides a fan, comprising:

[0020] The wind wheel, the central axis is arranged vertically:

[0021] A protective cover is arranged on the outer side of the wind wheel;

[0022] The motor is arranged in the protective cover, and the motor is connected to the first end of the central shaft and is used for driving the central shaft to rotate.

[0023] Beneficial effects: When the fan is working, the central axis rotates under the drive of the motor, and 360° horizontal air discharge can be achieved. Since 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 its rotation from the first end to the second end, it can scoop up the air and throw it out when rotating, which can stir the air more flexibly, making the air flow more efficient and the air volume larger. The setting of the protective cover can prevent users from touching the rotating fan blades, which is safer.

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

[0025] Beneficial effect: The arrangement of the bearing can make the impeller rotate smoothly and at high speed in the protective cover.

[0026] In an optional embodiment, the fan further includes:

[0027] A wet curtain, surrounding the outer side of the wind wheel and located in the protective cover;

[0028] A water tank, disposed at the bottom of the protective cover;

[0029] An annular water tank is arranged on the top of the wet curtain, and the annular water tank is provided with a plurality of water holes, and the water holes face the wet curtain;

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

[0031] Beneficial effect: The water supply structure can send the water in the water tank to the annular water tank. The water in the annular water tank flows to the wet curtain through the water outlet hole to humidify the wet curtain. Since the wet curtain surrounds the outside of the wind wheel, when the air passes through the wet curtain, the air will carry moisture, so the blown wind carries moisture, which can play a role in humidification and cooling after evaporation.

[0032] In an optional embodiment, the fan further includes a plurality of blocking members, each of the blocking members corresponds to the water discharge holes one by one, and the blocking members are suitable for blocking the water discharge holes or leaving the water discharge holes.

[0033] Beneficial effect: By setting the blocking piece, the blocking piece can block the drain hole or leave the drain hole, and some drain holes can be selected to be blocked according to needs, so that only the drain holes above the wet curtain on the side facing the user are not blocked, and the wet curtain on this side is humidified. When the air blows toward the user, the air passes through the wet curtain on this side, so that the wind blowing toward the user is cold air, and no water is wasted.

[0034] Specifically in one embodiment, the sealing member is made of silicone.

[0035] Specifically in one embodiment, the blocking member is columnar.

[0036] In an optional embodiment, the fan further includes a driving structure, and the driving structure is used to drive the blocking member to block or leave the drain hole.

[0037] Beneficial effect: The driving structure can drive the blocking piece to block or leave the drain hole. The user only needs to manipulate the driving structure to control the blocking piece to block or leave the drain hole, which is more convenient for users to use.

[0038] In an optional embodiment, the annular water tank includes a plurality of quadrant areas, each quadrant area is provided with at least one drain hole, and a driving structure can control all the blocking members in the same quadrant area to block or leave the drain hole at the same time.

[0039] Beneficial effect: The annular water tank is divided into multiple quadrant areas, and one driving structure can control all the blocking parts in the same quadrant area to block or leave the drain hole at the same time, which is more convenient for controlling each blocking part, and can also reduce the number of driving structures and avoid complex fan structure.

[0040] Specifically, when the user stands in front of a quadrant area, the driving structure of the quadrant area can be controlled to work so that the blocking parts in the quadrant area leave the drain holes at the same time, and the water in the annular water tank can flow to the wet curtain through the drain holes in the quadrant area, humidifying the wet curtain on that side, and the wind blown out from this side is cold wind. The blocking parts in the other quadrant areas block the corresponding drain holes, and the wind blown out from the other sides does not carry moisture.

[0041] In an optional embodiment, the driving structure includes an electromagnetic lock arranged above a plurality of sealing parts in each quadrant area, and when a current in a first direction is passed through the electromagnetic lock, the sealing part is driven to seal the drain hole, and when a current in a second direction is passed through the electromagnetic lock, the sealing part is driven to leave the drain hole.

[0042] Beneficial effect: When the user stands in front of a quadrant area, an electric current in the second direction can be passed through the electromagnetic lock in the quadrant area to drive multiple sealing parts in the quadrant area to leave the drain holes at the same time, and the water in the annular water tank can flow to the wet curtain through the drain holes in the quadrant area, humidifying the wet curtain on that side, and the wind blown out from this side is cold wind. An electric current in the first direction can be passed through the electromagnetic locks in the remaining quadrant areas, so that the sealing parts in the remaining quadrant areas block the corresponding drain holes, and the wind blown out from the remaining sides does not carry moisture.

[0043] In an optional embodiment, the protective cover is provided with an infrared sensor corresponding to each of the quadrant areas, and the fan further includes a controller, which is communicatively connected to the infrared sensors and the driving structure, and can control the driving structure in the corresponding quadrant area to operate so that the blocking piece in the corresponding quadrant area leaves the drain hole when one of the infrared sensors detects preset information, and can control the driving structures in the remaining quadrant areas to operate so that the blocking pieces in the remaining quadrant areas block the drain hole.

[0044] Beneficial effect: By setting up an infrared sensor, when the infrared sensor detects preset information, the controller automatically controls the driving structure in the corresponding quadrant area to work so that the sealing piece in the corresponding quadrant area leaves the drain hole, and the water in the annular water tank can flow to the wet curtain through the drain hole in the quadrant area, humidifying the wet curtain on that side, and the wind blown out from this side is cold wind. The controller controls the driving structure in the remaining quadrant areas to work so that the sealing pieces in the remaining quadrant areas block the drain holes, and no water will flow downward to the wet curtain in the remaining quadrant areas, which is more intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A schematic diagram of a fan according to an embodiment of the present invention when no wet curtain is provided;

[0047] Figure 2 for Figure 1 A top cross-sectional view of the fan shown;

[0048] Figure 3 for Figure 2 A is a partial enlarged schematic diagram;

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

[0050] Figure 5 for Figure 4 A partial enlarged schematic diagram of B in the figure.

[0051] Description of reference numerals:

[0052] 1. Central axis; 2. Fan blades; 3. Center bracket; 301. Ribs; 4. Protective cover; 5. Motor; 6. Bearings; 7. Wet curtain; 8. Water tank; 9. Annular water tank; 901. Drain hole; 902. Quadrant area; 10. Sealing parts; 11. Water pump; 12. Infrared sensor. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0054] In the related art, the fan uses a vortex wind wheel to blow air from one side to the other. Although the fan can shake its head, it is difficult to achieve 360° horizontal air discharge.

[0055] The tower fan in the related art can achieve 360° horizontal air outlet, but the wind wheel blades of the tower fan are mostly straight plate-shaped, resulting in low air flow efficiency and low air volume.

[0056] Combine the following Figures 1 to 4, describing an embodiment of the present invention.

[0057] According to an embodiment of the present invention, on the one hand, a wind wheel is provided, comprising a central axis 1 and a fan blade 2. A plurality of fan blades 2 are provided along the circumference of the central axis 1, a first end of the fan blade 2 is connected to the central axis 1, a second end is suspended, and from the first end to the second end, the fan blade 2 is bent toward the rotation direction thereof.

[0058] In this embodiment, when in use, the central axis 1 is set vertically. When the central axis 1 rotates under the drive of the motor 5, 360° horizontal air outlet can be achieved. Since the first end of the fan blade 2 is connected to the central axis 1, the second end is suspended in the air, and from the first end to the second end, the fan blade 2 is bent in the direction of rotation. When rotating, it can enclose the air and throw it out, which can stir the air more flexibly, making the air flow more efficient 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 wind discharge can be ensured.

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

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

[0063] In this embodiment, along the axial direction of the central axis 1, the width of the fan blade 2 increases first and then decreases. Figure 1 The wind wheel is in the shape of an American football as a whole, which is wide in the middle and pointed at both ends. When rotating, it can stir the air in the middle more flexibly, making the air flow more efficient. Compared with the straight-plate-shaped wind blades 2 in the related art, the wind blades 2 are wider and have 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, 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, the thickness of the fan blade 2 is increased first and then decreased from the first end to the second end of the fan blade 2, so that the fan blade 2 can be bent easily, and the friction between the edge of the fan blade 2 and the air is smaller, thereby reducing wind resistance.

[0067] In one embodiment, further reference is made to Figure 2 and Figure 3The wind wheel also includes a central support 3, and a plurality of wind blades 2 are fixed to the central support 3 near the central axis 1.

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

[0069] In one embodiment, the central support 3 includes at least one rib 301 , and the rib 301 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 the air flow and help reduce the overall weight of the wind wheel.

[0071] Specific as Figure 3 As shown, the rib 301 is circular.

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

[0073] Specific as Figure 3 As shown, three circular ribs 301 are provided.

[0074] It should be noted that the present embodiment does not limit the shape, number and diameter of the ribs 301 , which can be determined through experiments according to the requirements of wind speed and wind volume.

[0075] According to an embodiment of the present invention, on the other hand, a fan is provided, comprising the wind wheel, the protective cover 4 and the motor 5 provided in the above embodiment.

[0076] The central axis 1 of the wind wheel is vertically arranged; the protective cover 4 is arranged on the outside of the wind wheel; the motor 5 is arranged in the protective cover 4, and the motor 5 is connected to the first end of the central axis 1 for driving the central axis 1 to rotate.

[0077] In this embodiment, when the fan is working, the central axis 1 rotates under the drive of the motor 5, and 360° horizontal air discharge can be achieved. Since the first end of the fan blade 2 is connected to the central axis 1, the second end is suspended, and the fan blade 2 is bent toward its rotation direction from the first end to the second end, it can scoop up the air and throw it out when rotating, and can stir the air more flexibly, making the air flow more efficient and the air volume larger. The setting of the protective cover 4 can prevent the user from touching the rotating fan blade 2, which is safer.

[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 wind wheel is lower, and when it is a tower fan, the height of the wind wheel is higher to meet user needs.

[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 arrangement of the bearing 6 can enable the impeller to rotate smoothly and at high speed in the protective cover 4 .

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

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

[0083] In one embodiment, Figure 4 As shown, the fan further includes a wet curtain 7, a water tank 8, an annular water tank 9 and a water supply structure. The wet curtain 7 surrounds the outer side of the wind wheel and is located in the protective cover 4; the water tank 8 is arranged at the bottom of the protective cover 4; the annular water tank 9 is arranged at the top of the wet curtain 7, and the annular water tank 9 is provided with a plurality of water holes 901, which face the wet curtain 7; and the water supply structure is used to deliver the water in the water tank 8 to the annular water tank 9.

[0084] In this embodiment, the water supply structure can deliver the water in 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 water outlet hole 901 to humidify the wet curtain 7. Since the wet curtain 7 surrounds the outside of the wind wheel, when the air passes through the wet curtain 7, the air will carry moisture, so the blown wind 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 repeated use.

[0086] Specifically, the water supply structure includes a water pump 11 arranged in the water tank 8 and a water supply pipe (not shown in the figure) connected to the water outlet end 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, Figure 5 As shown, the fan further includes a plurality of blocking members 10 , and the blocking members 10 correspond to the water holes 901 one by one. The blocking members 10 are suitable for blocking the water holes 901 or leaving the water holes 901 .

[0088] In this embodiment, by setting the blocking member 10, the blocking member 10 can block the drain hole 901 or leave the drain hole 901, and some drain holes 901 can be selected to be blocked according to needs, so that only the drain holes 901 above the wet curtain 7 on the side facing the user are not blocked, and the wet curtain 7 on this side is humidified. When the air blows toward the user, the air passes through the wet curtain 7 on this side, so that the wind blowing toward the user is cold air, and no water is wasted.

[0089] In one embodiment, the fan further includes a driving structure, and the driving structure is used to drive the blocking member 10 to block or leave the drain hole 901 .

[0090] In this embodiment, the driving structure can drive the blocking member 10 to block or leave the drain hole 901. The user only needs to manipulate the driving structure to control the blocking member 10 to block or leave the drain hole 901, which is more convenient for users to use.

[0091] In one embodiment, the annular water tank 9 includes a plurality of quadrant areas 902 , each quadrant area 902 is provided with at least one drain hole 901 , and a driving structure can control all the blocking members 10 in the same quadrant area 902 to block or leave the drain hole 901 at the same time.

[0092] In this embodiment, the annular water tank 9 is divided into a plurality of quadrant areas 902, and one driving structure can control all the blocking parts 10 in the same quadrant area 902 to block or leave the drain hole 901 at the same time, which is more convenient for controlling each blocking part 10, and can also reduce the number of driving structures and avoid complex fan structure.

[0093] Specifically, when the user stands in front of a quadrant area 902, the driving structure of the quadrant area 902 can be controlled to work, so that the blocking parts 10 in the quadrant area 902 leave the drain hole 901 at the same time, and 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, and the wind blown out from this side is cold wind. The blocking parts 10 in the other quadrant areas 902 block the corresponding drain holes 901, and the wind blown out from the other sides does not carry moisture.

[0094] In a replaceable embodiment, each blocking member 10 can be connected to a driving structure. When a user stands in front of a quadrant area 902, the driving structures of the quadrant area 902 can be controlled to work simultaneously, so that the blocking members 10 in the quadrant area 902 all leave the drain holes 901, and the water in the annular water tank 9 can flow to the wet curtain 7 through the drain holes 901 in the quadrant area 902, humidifying the wet curtain 7 on that side, and the wind blown out from this side is cold wind. The blocking members 10 in the other quadrant areas 902 block the corresponding drain holes 901, and the wind blown out from the other sides does not carry moisture.

[0095] Specifically in one embodiment, a plurality of drain holes 901 are provided in each quadrant area 902 , and a driving structure can control a plurality of blocking members 10 in the same quadrant area 902 to block or leave the drain holes 901 at the same time.

[0096] Specific as Figure 5As shown, it is divided into four quadrant areas 902, and each quadrant area 902 is provided with three drain holes 901 and three blocking members 10. When the user stands in front of a quadrant area 902, the driving structure of the quadrant area 902 can be controlled to work, so that the three blocking members 10 in the quadrant area 902 leave the drain holes 901 at the same time, and the water in the annular water tank 9 can flow to the wet curtain 7 through the drain holes 901 in the quadrant area 902, humidifying the wet curtain 7 on that side, and the wind blown out from that side is cold wind, and the blocking members 10 in the other quadrant areas 902 block the corresponding drain holes 901, and the wind blown out from the other sides does not carry moisture.

[0097] In one embodiment, the driving structure includes an electromagnetic lock arranged above each sealing member 10 in each quadrant area 902. When a current in a first direction is passed through the electromagnetic lock, the sealing member 10 is driven to seal the drain hole 901. When a current in a second direction is passed through the electromagnetic lock, the sealing member 10 is driven to leave the drain hole 901.

[0098] In this embodiment, when the user stands in front of a quadrant area 902, a current in the second direction can be passed through the electromagnetic lock of the quadrant area 902 to drive the multiple sealing parts 10 in the quadrant area 902 to leave the drain hole 901 at the same time, and 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, and the wind blown out from this side is cold wind. The current in the first direction is passed through the electromagnetic locks in the remaining quadrant areas 902, so that the sealing parts 10 in the remaining quadrant areas 902 block the corresponding drain holes 901, and the wind blown out from the remaining sides does not carry moisture.

[0099] It should be noted that the movement range of each plugging member 10 is limited by the drain hole 901 and the electromagnetic lock. For example, when the plugging member 10 in a certain quadrant area 902 needs to leave the drain hole 901, if the plugging member 10 is originally in a position away from the drain hole 901, even if the electromagnetic lock in the quadrant area 902 is supplied with a current in the second direction, the plugging member 10 will not continue to move. Similarly, for example, when the plugging member 10 in a certain quadrant area 902 needs to block the drain hole 901, if the plugging member 10 is originally blocked in the drain hole 901, even if the electromagnetic lock in the quadrant area 902 is supplied with a current in the first direction, the plugging member 10 will not continue to move downward.

[0100] Specifically, the electromagnetic lock may include a magnet fixed on the top of the blocking member 10, that is, an electromagnet arranged at intervals above the magnet. When an electric current in a first direction is passed through the electromagnet, the polarity of the magnetic pole of the lower end of the electromagnet is the same as that of the upper end of the magnet, generating a repulsive force, thereby driving the blocking member 10 to move downward; when an electric current in a second direction is passed through the electromagnet, the polarity of the magnetic pole of the lower end of the electromagnet is opposite to that of the upper end of the magnet, thereby generating an attractive force, thereby driving the blocking member 10 to move upward.

[0101] In an alternative embodiment, the driving structure may include a cylinder, an end of which is connected to the plurality of blocking members 10 in the quadrant area 902 .

[0102] In one embodiment, the protective cover 4 is provided with an infrared sensor 12 corresponding to each quadrant area 902, and the fan also includes a controller, which is communicatively connected with the infrared sensor 12 and the driving structure. When one of the infrared sensors 12 detects preset information, the controller can control the driving structure in the corresponding quadrant area 902 to operate so that the blocking piece 10 in the corresponding quadrant area 902 leaves the drain hole 901, and control the driving structure in the remaining quadrant areas 902 to operate so that the blocking pieces 10 in the remaining quadrant areas 902 block 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 driving structure in the corresponding quadrant area 902 to operate so that the sealing member 10 in the corresponding quadrant area 902 leaves the drain hole 901, and 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, and the wind blown out from this side is cold wind. The controller controls the driving structure in the remaining quadrant areas 902 to operate so that the sealing members 10 in the remaining quadrant areas 902 block the drain hole 901, and no water in the remaining quadrant areas 902 will flow downward to the wet curtain 7, which is more intelligent.

[0104] Specifically in one embodiment, the preset information is a preset temperature, for example, greater than 25° C. or a concentrated heat source is detected.

[0105] Specifically in one embodiment, there are four quadrant areas 902, namely the first area, the second area, the third area and the fourth area. Correspondingly, there are four infrared sensors 12. When the infrared sensor 12 corresponding to the first area detects preset information, the controller automatically controls the driving structure in the first area to operate so that the sealing member 10 in the first area leaves the drain hole 901, and the water in the annular water tank 9 can flow to the wet curtain 7 through the drain hole 901 in the first area, humidifying the wet curtain 7 on the lower side of the first area, and the wind blown out from this side is cold wind. The controller controls the driving structures in the second area, the third area and the fourth area to operate so that the sealing members 10 in the second area, the third area and the fourth area block the drain hole 901, and no water in the second area, the third area and the fourth area will flow downward to the wet curtain 7.

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

Claims

1. A wind wheel, characterized in that: include: Central axis (1); A plurality of fan blades (2) are provided along the circumference of the central axis (1); a first end of the fan blade (2) is connected to the central axis (1), a second end is suspended in the air, and from the first end to the second end, the fan blade (2) is bent toward its rotation direction.

2. The wind wheel 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 wind wheel 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 wind wheel 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 wind wheel according to any one of claims 1 to 3, characterized in that: The wind wheel also includes a central support (3), and the plurality of wind blades (2) are fixed to the central support (3) at positions close to the central axis (1).

6. The wind wheel according to claim 5, characterized in that: The central support (3) comprises at least one rib (301), wherein the rib (301) surrounds the outside of the central axis (1).

7. A fan, characterized in that: include: The wind wheel according to any one of claims 1 to 6, wherein the central axis (1) is arranged vertically: A protective cover (4) is arranged on the outer side of the wind wheel; A motor (5) is disposed in the protective cover (4); the motor (5) is connected to the first end of the central shaft (1) and is used to drive the central shaft (1) to rotate.

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

9. The fan according to claim 7 or 8, characterized in that: The fan further comprises: A wet curtain (7) surrounds the outer side of the wind wheel and is located inside the protective cover (4); A water tank (8) is arranged at the bottom of the protective cover (4); An annular water trough (9) is arranged on the top of the wet curtain (7), the annular water trough (9) is provided with a plurality of water discharge holes (901), and the water discharge holes (901) face the wet curtain (7); The water supply structure is used to deliver the water in the water tank (8) to the annular water tank (9).

10. The fan according to claim 9, characterized in that The fan further comprises a plurality of blocking members (10), wherein the blocking members (10) correspond to the water discharge holes (901) one by one, and the blocking members (10) are suitable for blocking the water discharge holes (901) or leaving the water discharge holes (901).

11. The fan according to claim 10, characterized in that The fan further comprises a driving structure, wherein the driving structure is used to drive the blocking member (10) to block or leave the drain hole (901).

12. The fan according to claim 11, characterized in that The annular water tank (9) comprises a plurality of quadrant areas (902), each quadrant area (902) being provided with at least one drainage hole (901), and a driving structure being capable of controlling all the blocking members (10) in the same quadrant area (902) to simultaneously block or leave the drainage hole (901).

13. The fan according to claim 12, characterized in that The driving structure comprises an electromagnetic lock disposed above a plurality of blocking members (10) in each quadrant area (902); when a current in a first direction is passed through the electromagnetic lock, the blocking member (10) is driven to block the drain hole (901); and when a current in a second direction is passed through the electromagnetic lock, the blocking member (10) is driven to leave the drain hole (901).

14. The fan according to claim 12 or 13, characterized in that: The protective cover (4) is provided with an infrared sensor (12) corresponding to each of the quadrant areas (902), and the fan further comprises a controller, the controller being in communication connection with the infrared sensor (12) and the driving structure, and being capable of controlling the driving structure in the corresponding quadrant area (902) to operate so that the blocking piece (10) in the corresponding quadrant area (902) leaves the drain hole (901) when one of the infrared sensors (12) detects preset information, and controlling the driving structures in the remaining quadrant areas (902) to operate so that the blocking pieces (10) in the remaining quadrant areas (902) block the drain hole (901).

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