Cooling fan and control method thereof

Abstract

The present application relates to a kind of cold fan and its control method, a kind of cold fan control method includes: whether the user issues humidification control instruction is judged;When the user does not issue humidification control instruction, control wet curtain is in initial position unmoved, initial position is parallel to the air outlet direction of head position;When the user issues humidification control instruction, control wet curtain rotates.A kind of above-mentioned cold fan control method in cold fan includes body, head and wet curtain, head is rotatably arranged in one end of body, and wet curtain is rotatably arranged in head.In above-mentioned cold fan and its control method, when the user does not issue humidification control instruction, control wet curtain is in initial position unmoved, to reduce the obstruction of wet curtain to air inlet, guarantee the larger air intake, so that the blowing effect is better;When the user issues humidification control instruction, control wet curtain rotates, to increase the contact area of air and wet curtain, let the humidity of the wind blown out be greater, so that the cooling effect is better.

Description

Technical Field

[0001] This invention relates to the field of fan technology, and in particular to a cooling fan and its control method. Background Technology

[0002] Currently, the air coolers on the market are direct evaporative cooling and humidifying devices. Their working principle is that a water pump sends water from the water tank to the wet curtain. When the air passes through the wet curtain, it carries moisture and uses the principle of water evaporation to absorb heat, thereby achieving the purpose of cooling and humidifying.

[0003] However, existing evaporative air coolers cannot match different humidification and cooling effects according to the user's usage scenario, resulting in a poor user experience. Summary of the Invention

[0004] Therefore, it is necessary to provide a cooling fan and its control method to address the problem that existing cooling fans cannot match different humidification and cooling effects according to the user's usage scenario.

[0005] A method for controlling an air cooler, the air cooler including a fan head and an evaporative cooling pad disposed within the fan head, the method comprising: determining whether a user issues a humidification control command; when the user does not issue a humidification control command, controlling the evaporative cooling pad to remain stationary in an initial position, the initial position being a position parallel to the air outlet direction of the fan head; and when the user issues a humidification control command, controlling the evaporative cooling pad to rotate.

[0006] The aforementioned control method for the evaporative air cooler can control whether the evaporative cooling pad rotates based on whether the user issues a humidification control command. When the user does not issue a humidification control command, the evaporative cooling pad remains stationary in its initial position to reduce obstruction of the air inlet, ensuring a larger air intake and better blowing effect. When the user issues a humidification control command, the evaporative cooling pad rotates to increase the contact area between the air and the evaporative cooling pad, resulting in higher humidity of the blown-out air and better cooling effect.

[0007] In one embodiment, when a user issues a humidification command, the step of controlling the rotation of the wet curtain includes: when the user issues a humidification control command, determining whether the user issues a head-shaking control command; when the user issues a humidification control command but does not issue a head-shaking control command, controlling the wet curtain to rotate to a first position and then fixing it stationary; when the user issues both a humidification control command and a head-shaking control command, controlling the rotation mode and rotation angle of the wet curtain according to the head-shaking control command.

[0008] In one embodiment, when the user issues a humidification control command and an oscillation control command, the step of controlling the rotation mode and rotation angle of the wet curtain according to the oscillation control command includes: when the user issues a humidification control command and an oscillation command (left and right), controlling the wet curtain to rotate to the first position and then fixing it stationary, the first position being a position perpendicular to the air outlet direction of the unit head; when the user issues a humidification control command and an oscillation command (up and down), controlling the rotation mode and rotation angle of the wet curtain according to the up and down oscillation angle.

[0009] In one embodiment, when the user issues a humidification control command and an up-and-down oscillation command, the step of controlling the rotation mode and rotation angle of the wet curtain according to the up-and-down oscillation angle includes: when the up-and-down oscillation angle is less than 35 degrees, controlling the wet curtain to rotate synchronously with the machine head; when the up-and-down oscillation angle is greater than 35 degrees and less than 90 degrees, controlling the wet curtain to rotate to a first preset angle and then fixing it.

[0010] In one embodiment, the first preset angle is less than 45 degrees.

[0011] In one embodiment, the first preset angle is 35 degrees.

[0012] In one embodiment, before determining whether the user has issued a humidification control command, the following steps are included: when a power-on control command is received, the position information of the wet curtain is obtained, and the wet curtain is controlled to return to the initial position.

[0013] The cooling fan in the above-mentioned control method includes a body, a fan head, and an evaporative cooling pad. The fan head is rotatably disposed at one end of the body, and the evaporative cooling pad is rotatably disposed inside the fan head.

[0014] The aforementioned evaporative air cooler can control the rotation of the evaporative cooling pad based on whether the user issues a humidification control command. When the user does not issue a humidification control command, the evaporative cooling pad remains stationary in its initial position to reduce obstruction of the air inlet, ensuring a larger airflow and better cooling effect. When the user issues a humidification control command, the evaporative cooling pad rotates to increase the contact area between the air and the pad, resulting in higher humidity in the blown-out air and better cooling effect.

[0015] In one embodiment, the cooling fan further includes a first drive member, a second drive member, and a third drive member. The first drive member is connected to the fan head and is used to drive the fan head to oscillate up and down. The second drive member is connected to the fan head and is used to drive the fan head to oscillate left and right. The third drive member is connected to the evaporative cooling pad and is used to drive the evaporative cooling pad to rotate.

[0016] In one embodiment, the cooling fan further includes a base, a pump body, and a liquid storage tank. The base is located at the end of the machine body away from the machine head. The pump body and the liquid storage tank are located inside the base. The liquid storage tank is connected to the evaporative cooling pad and is used to supply liquid to the evaporative cooling pad. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a cooling fan in one embodiment.

[0018] Figure 2 for Figure 1 The image shows a side view of a cooling fan, with the evaporative cooling pad parallel to the ground.

[0019] Figure 3 for Figure 1 The image shows a side view of a cooling fan, with the evaporative cooling pad perpendicular to the ground.

[0020] Figure 4 for Figure 1 The image shows a side view of a cooling fan, where the evaporative cooling pad is not at a 90-degree angle to the ground.

[0021] Figure 5 for Figure 1 The control logic diagram of the air cooler is shown below.

[0022] Figure label:

[0023] 100, Head unit; 200, Evaporative cooling pad; 300, Body unit; 400, First drive unit; 500, Second drive unit; 600, Base; 700, Support frame. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "initial," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] Please refer to Figure 1 and Figure 2 In one embodiment, the evaporative air cooler includes a fan head 100 and an evaporative cooling pad 200 disposed within the fan head 100. The control method of the evaporative air cooler includes the following steps: determining whether the user issues a humidification control command; when the user does not issue a humidification control command, controlling the evaporative cooling pad 200 to remain stationary in an initial position, the initial position being parallel to the air outlet direction of the fan head 100; when the user issues a humidification control command, controlling the evaporative cooling pad 200 to rotate.

[0031] It should be noted that the compressor head 100 has an air inlet and an air outlet. The evaporative cooling pad 200 is located inside the compressor head 100 and between the air inlet and the air outlet. Air enters the compressor head 100 through the air inlet and flows through the evaporative cooling pad 200 for physical cooling, turning it into cold air. The cold air is then discharged from the air outlet, thus providing cool air to the user. The evaporative cooling pad 200 requires a coolant supply from a liquid storage tank at the bottom of the compressor head 100. The coolant is delivered from below to the evaporative cooling pad 200 to cool the air passing through it.

[0032] refer to Figure 2 When the user does not issue a humidification control command, the evaporative cooling pad 200 remains in its initial position, parallel to the air outlet direction (i.e., the X direction shown in Figure 2) (meaning both the evaporative cooling pad 200 and the air outlet direction are parallel to the ground), to reduce the obstruction of the evaporative cooling pad 200 to the air inlet; (Reference) Figure 3 and Figure 4 When the user issues a humidification control command, the wet curtain 200 is controlled to rotate so that the wet curtain 200 covers the air inlet as large an area as possible, so that the blown air has a higher humidity.

[0033] The aforementioned control method for the evaporative air cooler can control whether the evaporative cooling pad 200 rotates based on whether the user issues a humidification control command. When the user does not issue a humidification control command, the evaporative cooling pad 200 remains stationary in its initial position to reduce the obstruction of the air inlet by the evaporative cooling pad 200, ensuring a larger air intake and better blowing effect. When the user issues a humidification control command, the evaporative cooling pad 200 rotates to increase the contact area between the air and the evaporative cooling pad 200, resulting in higher humidity of the blown-out air and better cooling effect.

[0034] Specifically, in the embodiments, refer to Figures 3 to 5 When a user issues a humidification command, the steps for controlling the rotation of the evaporative cooling pad 200 include:

[0035] When the user issues a humidification control command, determine whether the user has issued an oscillation control command;

[0036] When the user issues a humidification control command but does not issue an oscillation control command, the control wet curtain 200 rotates to the first position and then remains stationary. The first position is a position perpendicular to the air outlet direction of the head unit 100.

[0037] When the user issues a humidification control command and an oscillation control command, the rotation mode and rotation angle of the wet curtain 200 are controlled according to the oscillation control command.

[0038] Understandably, when a user turns on the humidification function, it is necessary to further determine whether the user has turned on the oscillation function, and to differentiate and control the rotation of the wet curtain 200 based on whether the oscillation function is turned on.

[0039] For example, refer to Figure 3 If the user has not activated the oscillation function, humidification is sufficient. Rotate the evaporative cooling pad 200 to a position perpendicular to the air outlet direction of the unit 100 (i.e., the air outlet direction is parallel to the ground, and the evaporative cooling pad 200 is perpendicular to the ground), and then fix it in place. This allows the evaporative cooling pad 200 to cover the air inlet as large an area as possible, resulting in higher humidity in the blown-out air and better humidification and cooling effects. (Reference) Figure 4 If the user turns on the oscillation function, in addition to humidification, it is also necessary to expand the air blowing range. Select the rotation method and rotation angle of the wet curtain 200 according to the specific oscillation type. On the basis of ensuring the humidification and cooling effect, try to improve the situation of water leakage caused by the wet curtain 200 due to improper rotation angle.

[0040] Further, please refer to Figure 3 and Figure 4 When the user issues a humidification control command and an oscillation control command, the steps for controlling the rotation mode and angle of the wet curtain 200 according to the oscillation control command include:

[0041] When the user issues a humidification control command and a left / right oscillation command, the wet curtain 200 is controlled to rotate to the first position and then remain stationary.

[0042] When the user issues a humidification control command and a tumbling command, the rotation mode and angle of the wet curtain 200 are controlled according to the tumbling angle.

[0043] Understandably, when a user activates the humidification and oscillation functions, the control is differentiated based on the range of oscillation angles. (Reference) Figure 3When the user activates the humidification and left / right oscillation functions, the evaporative cooling pad 200 should be rotated to a position perpendicular to the air outlet direction of the unit head 100 (i.e., the air outlet direction is parallel to the ground, and the evaporative cooling pad 200 is perpendicular to the ground) and then fixed in place. This allows the evaporative cooling pad 200 to cover the air inlet as large an area as possible, resulting in higher humidity in the blown air and better humidification and cooling effects. Here, the pump is only activated when the angle of the evaporative cooling pad 200 is greater than or equal to 35° (this angle can be set after actual measurement based on factors such as the water absorption rate of the evaporative cooling pad 200 and the pump flow rate of different products). The pump is used to deliver the coolant from the liquid storage tank at the bottom of the unit head 100 to the evaporative cooling pad 200, preventing dripping or leakage caused by the coolant not being quickly absorbed by the evaporative cooling pad 200 due to gravity if the angle between the evaporative cooling pad 200 and the air outlet direction is too small.

[0044] For specific implementation details, please refer to the following examples. Figure 3 and Figure 4 When the user issues a humidification control command and a vertical oscillation command, the steps for controlling the rotation method and angle of the wet curtain 200 according to the vertical oscillation angle include:

[0045] When the vertical oscillation angle is less than 35 degrees, control the wet curtain 200 to rotate synchronously with the machine head 100;

[0046] When the vertical oscillation is greater than 35 degrees but less than 90 degrees, the wet curtain 200 is controlled to rotate to the first preset angle and then fixed.

[0047] It should be noted that synchronous rotation can be understood as rotating at the same speed and in the same direction. (Reference) Figure 2 If the evaporative cooling pad 200 is completely parallel to the air outlet direction of the unit head 100, although this can reduce the obstruction of the evaporative cooling pad 200 to the air inlet and increase the air intake, the angle between the evaporative cooling pad 200 and the air outlet direction will be too small, causing the coolant to be unable to be quickly absorbed by the evaporative cooling pad 200 due to gravity, resulting in dripping and leakage. (Reference) Figure 3 If the evaporative cooling pad 200 is completely perpendicular to the air outlet direction of the head unit 100, although it can improve the situation where the coolant cannot be quickly absorbed by the evaporative cooling pad 200 due to gravity, resulting in dripping and leakage, the evaporative cooling pad 200 will greatly obstruct the air inlet, thus reducing the air intake volume.

[0048] In the above embodiments, reference is made to Figure 4When the vertical oscillation angle is less than 35 degrees, the wet curtain 200 is controlled to rotate synchronously with the machine head 100, and the angle of the wet curtain 200 is adjusted within a small range. This can prevent the wet curtain 200 from blocking the air inlet, ensuring the air intake while improving the dripping and leakage of the wet curtain 200. When the vertical oscillation angle is greater than 35 degrees and less than 90 degrees, the angle of the wet curtain 200 is not adjusted within a large range. Instead, the wet curtain 200 is rotated to the first preset angle and then fixed. This can prevent the wet curtain 200 from blocking the air inlet, ensuring the air intake while improving the dripping and leakage of the wet curtain 200.

[0049] In one specific embodiment, please refer to Figure 4 The first preset angle is less than 45 degrees.

[0050] Understandably, the first preset angle is less than 45 degrees, meaning the angle between the evaporative cooling pad 200 and the air outlet direction of the unit 100 is less than 45 degrees. If the evaporative cooling pad 200 is completely parallel to the air outlet direction of the unit 100, although this reduces the obstruction of the evaporative cooling pad 200 to the air inlet and increases the air intake, the small angle between the evaporative cooling pad 200 and the air outlet direction will cause the coolant to be unable to be quickly absorbed by the evaporative cooling pad 200 due to gravity, resulting in dripping and leakage. If the evaporative cooling pad 200 is completely perpendicular to the air outlet direction of the unit 100, although this can improve the situation of the coolant not being quickly absorbed by the evaporative cooling pad 200 due to gravity, the obstruction of the evaporative cooling pad 200 to the air inlet will be greater, reducing the air intake. By making the first preset angle less than 45 degrees, both ensuring the air intake and improving the dripping and leakage of the evaporative cooling pad 200 can be balanced.

[0051] Preferably, please refer to Figure 4 The first preset angle is 35 degrees.

[0052] It should be noted that in other embodiments, the first preset angle may be other numerical ranges.

[0053] For specific implementation details, please refer to the following examples. Figure 5 Before determining whether the user has issued a humidification control command, the following steps are also included:

[0054] When a power-on control command is received, the position information of the wet curtain 200 is obtained, and the wet curtain 200 is controlled to return to its initial position.

[0055] It should be noted that when the air cooler is turned on, the fan head 100 and the evaporative cooling pad 200 are returned to their initial positions to ensure that the fan head 100 and the evaporative cooling pad 200 are in their initial positions (that is, the air outlet direction of the evaporative cooling pad 200 and the fan head 100 is parallel to the ground).

[0056] Please refer to Figure 1 and Figure 2The cooling fan in the above-mentioned cooling fan control method includes a body 300, a fan head 100 and a wet curtain 200. The fan head 100 is rotatably disposed at one end of the body 300, and the wet curtain 200 is rotatably disposed inside the fan head 100.

[0057] It should be noted that the unit 100 has an air inlet and an air outlet. The wet curtain 200 is located inside the unit 100 and between the air inlet and the air outlet. Air enters the unit 100 from the air inlet and flows through the wet curtain 200 for physical cooling, turning into cold air. The cold air is then discharged from the air outlet, thereby achieving the purpose of providing cold air to the user.

[0058] The aforementioned air cooler can control whether the evaporative cooling pad 200 rotates based on whether the user issues a humidification control command. When the user does not issue a humidification control command, the evaporative cooling pad 200 remains stationary in its initial position to reduce the obstruction of the air inlet by the evaporative cooling pad 200, ensuring a larger air intake and better blowing effect. When the user issues a humidification control command, the evaporative cooling pad 200 rotates to increase the contact area between the air and the evaporative cooling pad 200, resulting in higher humidity of the blown air and better cooling effect.

[0059] In this embodiment, the head 100 and the body 300 are detachably connected. For example, one end of the body 300 is provided with a support frame 700, which has two opposing rotating mounting parts. The two sides of the head 100 are respectively rotatably connected to the corresponding rotating mounting parts, thereby enabling the head 100 to be rotatably mounted on the body 300. In other embodiments, the head 100 and the body 300 can also be connected in other ways.

[0060] In this embodiment, the evaporative cooling pad 200 and the machine head 100 are detachably connected. For example, one end of the machine body 300 is provided with a support frame 700, which has a connecting part, and the evaporative cooling pad 200 is rotatably mounted on the connecting part. In other embodiments, the evaporative cooling pad 200 and the machine head 100 can also be connected in other ways.

[0061] For details, please refer to Figure 1 and Figure 2 The cooling fan also includes a first drive unit 400, a second drive unit 500 and a third drive unit. The first drive unit 400 is connected to the head unit 100 and is used to drive the head unit 100 to oscillate up and down. The second drive unit 500 is connected to the head unit 100 and is used to drive the head unit 100 to oscillate left and right. The third drive unit is connected to the wet curtain 200 and is used to drive the wet curtain 200 to rotate.

[0062] It should be noted that the evaporator also includes a controller, which is electrically connected to the first drive unit 400, the second drive unit 500, and the third drive unit. When the user issues humidification control commands, oscillation control commands, and power-on control commands, the controller can receive the user commands and control the operating status and rotation angle of the first drive unit 400, the second drive unit 500, and the third drive unit according to the user commands.

[0063] For example, when the user does not issue a humidification control command, the control panel 200 remains in its initial position and does not move. At this time, the controller controls the third drive component to not work.

[0064] When the user issues a humidification control command but does not issue an oscillation control command, the control panel 200 rotates to the first position and then remains stationary. The first position is perpendicular to the air outlet direction of the head unit 100. At this time, the controller controls the third drive component to rotate 90 degrees and then remains stationary. The first drive component 400 and the second drive component 500 do not work.

[0065] When the user issues a humidification control command and an oscillation control command, the controller controls the operating status and rotation angle of the third drive unit, the first drive unit 400, and the second drive unit 500 according to the oscillation control command.

[0066] In this embodiment, the first driving component 400, the second driving component 500, and the third driving component are all motors. The type of motor can be a stepper motor or other motors, and the type of motor is not specifically limited here.

[0067] For more specific details, please refer to Figure 1 The cooling fan also includes a base 600, a pump body, and a liquid storage tank. The base 600 is located at the end of the body 300 away from the head 100. The pump body and the liquid storage tank are located inside the base 600. The liquid storage tank is connected to the evaporative cooling pad 200 and is used to supply liquid to the evaporative cooling pad 200.

[0068] It should be noted that the base 600 is connected to the end of the unit 300 away from the head 100 and is used to support the unit 300. The evaporative cooling pad 200 has a water guide pipe that passes through the unit 300 and connects to the liquid storage tank. The pump body delivers the coolant in the liquid storage tank from below to the evaporative cooling pad 200 so that the evaporative cooling pad 200 cools the air passing through it. The coolant can be pure water or other types of refrigerant.

[0069] In this embodiment, the pump body can be a mechanical pump or other types of electronic pumps, and the specific type of pump body is not limited here.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A control method of a cooling fan, the cooling fan comprising a head (100) and a wet curtain (200) provided in the head (100), characterized in that, The control method for the cooling fan includes: Determine if the user has issued a humidification control command; When the user does not issue a humidification control command, the wet curtain (200) is controlled to remain in the initial position, which is a position parallel to the air outlet direction of the machine head (100); When the user issues a humidification control command, determine whether the user has issued an oscillation control command; When the user issues a humidification control command but does not issue an oscillation control command, the wet curtain (200) is controlled to rotate to a first position and then fixed. The first position is a position perpendicular to the air outlet direction of the head (100). When the user issues a humidification control command and an oscillation control command, the rotation mode and rotation angle of the wet curtain (200) are controlled according to the oscillation control command; When the user issues a humidification control command and a left and right oscillation command, the wet curtain (200) is controlled to rotate to the first position and then remain stationary; When the user issues a humidification control command and a vertical oscillation command, the steps for controlling the rotation mode and rotation angle of the wet curtain (200) according to the vertical oscillation angle include: When the up-and-down oscillation angle is less than 35 degrees, the wet curtain (200) and the machine head (100) are controlled to rotate synchronously; When the vertical oscillation is greater than 35 degrees and less than 90 degrees, the wet curtain (200) is controlled to rotate to the first preset angle and then fixed.

2. The control method of the cold fan according to claim 1, characterized by, The first preset angle is less than 45 degrees.

3. The control method for a cooling fan according to claim 1, characterized in that, The first preset angle is 35 degrees.

4. The control method of the cold fan according to claim 1, characterized by, Before determining whether the user has issued a humidification control command, the following steps are also included: When a power-on control command is received, the position information of the wet curtain (200) is obtained, and the wet curtain (200) is controlled to return to the initial position.

5. A cold fan in a control method of the cold fan as claimed in any one of claims 1 to 4, characterized by include: fuselage (300); The head (100) is rotatably disposed at one end of the body (300); The wet curtain (200) is rotatably disposed inside the machine head (100).

6. The cold fan according to claim 5, wherein The cooling fan also includes a first drive unit (400), a second drive unit (500) and a third drive unit. The first drive unit (400) is connected to the head unit (100) and is used to drive the head unit (100) to oscillate up and down. The second drive unit (500) is connected to the head unit (100) and is used to drive the head unit (100) to oscillate left and right. The third drive unit is connected to the wet curtain (200) and is used to drive the wet curtain (200) to rotate.

7. The cold fan according to claim 5, wherein The cooling fan also includes a base (600), a pump body, and a liquid storage tank. The base (600) is located at one end of the body (300) away from the head (100). The pump body and the liquid storage tank are located inside the base (600). The liquid storage tank is connected to the wet curtain (200) and is used to supply liquid to the wet curtain (200).

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