Tower fan

Abstract

The present application relates to the technical field of air temperature adjustment. Provided is a tower fan, comprising: a main body formed with an air output window; and an air output grille mounted on the air output window, wherein the air output grille comprises at least two swing vane assemblies, with each swing vane assembly comprising a plurality of swing vanes extending in a vertical direction; the swing vanes swing in the width direction of the air output window; and the orientations of the swing vanes in at least some of the swing vane assemblies are not synchronized. Since the tower fan according to the embodiments of the present application comprises at least two swing vane assemblies, and the orientations of the swing vanes of the swing vane assemblies are not completely synchronized, it can be ensured that the swing vanes of a plurality of swing vane assemblies can successively reach a corresponding area, thereby increasing the blowing frequency of the tower fan. For a user, the swing vanes of different swing vane assemblies sequentially blow airflow to an area where the user is located, such that the blowing frequency experienced by the user can be multiplied, thereby greatly increasing the effective air supply time of the tower fan, and improving an air blowing effect.

Description

Tower Fan

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application No. 202520157638X, filed on January 22, 2025, entitled “Tower Fan”, which is incorporated herein by reference in its entirety. Technical Field

[0003] This application relates to the field of air temperature control technology, and more particularly to tower fans. Background Technology

[0004] Tower fans are generally larger in height than in other directions, especially in width, where the air outlet is relatively small. To increase the air outlet width, related technologies incorporate swivel blades in the air outlet grille, which expand the airflow area by oscillating left and right. However, the swivel blades take a relatively long time to complete one round trip, resulting in insufficient effective airflow time and negatively impacting the user experience. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the related art. To this end, this application proposes a tower fan that can improve the effective air delivery time.

[0006] The tower fan according to an embodiment of this application includes:

[0007] The body has air outlet windows;

[0008] An air outlet grille is installed at the air outlet window. The air outlet grille includes at least two sway blade assemblies. Each sway blade assembly includes multiple sway blades extending in a vertical direction. The sway blades swing along the width direction of the air outlet window, and the sway blades in at least some of the sway blade assemblies are not aligned synchronously.

[0009] According to the embodiments of this application, the tower fan includes at least two oscillating blade assemblies, and the oscillating blades of the assemblies are not completely synchronized. This ensures that the oscillating blades of multiple assemblies can reach the corresponding areas sequentially, thereby increasing the airflow frequency of the tower fan. For the user, the airflow frequency experienced by the oscillating blades of different assemblies blowing air towards the user's area sequentially can be multiplied, greatly extending the effective airflow time of the tower fan and improving the airflow effect.

[0010] According to one embodiment of this application, the oscillating blade assembly includes an upper oscillating blade assembly and a lower oscillating blade assembly. The air outlet window is equipped with an air outlet frame, which includes a top crossbeam and a bottom crossbeam. A middle crossbeam is fixed in the middle of the air outlet frame. The upper oscillating blade assembly is installed between the top crossbeam and the middle crossbeam, and the lower oscillating blade assembly is installed between the bottom crossbeam and the middle crossbeam.

[0011] According to one embodiment of this application, the central crossbeam is detachably installed on the air outlet frame.

[0012] According to one embodiment of this application, fixing blocks are provided at both ends of the central crossbeam, and fixing holes are provided in the air outlet frame, with the fixing blocks fixed in the fixing holes.

[0013] According to one embodiment of this application, the top of the air outlet frame is provided with a first opening groove, the bottom of the air outlet frame is provided with a second opening groove, the upper surface of the middle crossbeam is provided with a first pin, the lower surface of the middle crossbeam is provided with a second pin, the top of the blades of the upper blade assembly is provided with a first rotating shaft that can be installed into the first opening groove, the bottom of the blades of the upper blade assembly is provided with a first mounting hole that rotatably engages with the first pin, the top of the blades of the lower blade assembly is provided with a second mounting hole that engages with the second pin, and the bottom of the blades of the lower blade assembly is provided with a second rotating shaft that can be installed into the second opening groove.

[0014] According to one embodiment of this application, both the first opening groove and the second opening groove are provided with a guide section and a rotating section. Both the first rotating shaft and the second rotating shaft enter the rotating section along the guide section and are rotatably mounted on the rotating section.

[0015] According to one embodiment of this application, the tower fan includes a power-coupled motor and a drive link. The drive link is provided with a third opening slot, and the oscillating blade is provided with a connecting rod. The third opening slot and the connecting rod correspond one-to-one and are rotatably engaged. The connecting rod is not coaxial with the first rotating shaft or the second rotating shaft.

[0016] According to one embodiment of this application, the tower fan includes a first motor and a second motor, and the drive linkage includes a first drive linkage and a second drive linkage. The first motor is connected to the first drive linkage, and the second motor is connected to the second drive linkage. The first drive linkage is disposed at the top of the upper swing blade assembly, and the second drive linkage is disposed at the bottom of the lower swing blade assembly.

[0017] According to one embodiment of this application, the drive link is provided with a mounting groove, and the output end of the motor is connected to an eccentric wheel. The eccentric wheel and the inner surface of the mounting groove cooperate to swing the drive link.

[0018] According to one embodiment of this application, when the blades of the upper blade assembly swing to a first limit angle of the air outlet window, the blades of the lower blade assembly swing to a second limit angle of the air outlet window, wherein the first limit angle and the second limit angle are limit angles in opposite directions along the width direction of the air outlet window.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is an exploded schematic diagram of the tower fan provided in an embodiment of this application.

[0022] Figure 2 is a magnified view of part A in Figure 1.

[0023] Figure 3 is a magnified view of part B in Figure 1.

[0024] Figure 4 is a magnified view of part C in Figure 1.

[0025] Figure 5 is a perspective view of the tower fan provided in an embodiment of this application.

[0026] Figure 6 is a schematic diagram of the assembly of the oscillating blade assembly according to an embodiment of this application.

[0027] Reference numerals: 100, Body; 110, Air outlet window; 200, Air outlet grille; 210, Oscillator assembly; 211, Upper oscillator assembly; 2111, First rotating shaft; 2112, First mounting hole; 212, Lower oscillator assembly; 2121, Second rotating shaft; 2122, Second mounting hole; 213, Connecting rod; 214, Oscillator; 300, Air outlet frame; 310, Top crossbeam; 311, First opening slot; 3111, Guide section; 3112, Rotating section; 320, Bottom crossbeam; 321, Second opening slot; 330, Fixing hole; 340, Fixing slot; 400, Middle crossbeam; 410, First pin; 420, Second pin; 430, Fixing block; 431, Guide surface; 500, First motor; 600, Second motor; 700, Drive linkage; 710, Lever; 711, Mounting slot; 720, Third opening slot; 800, Eccentric wheel. Detailed Implementation

[0028] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0029] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application 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 the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0031] In the embodiments of this application, unless otherwise expressly 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," "on top of," and "over" 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.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] Because existing tower fans suffer from short effective air delivery time, this application provides a tower fan, as shown in Figure 1, which includes a body 100 and an air outlet grille 200. The body 100 has an air outlet window 110, and the air outlet grille 200 is installed in the air outlet window 110. The air outlet grille 200 includes at least two oscillating blade assemblies 210, each of which includes multiple oscillating blades 214 extending vertically. The oscillating blades 214 swing along the width of the air outlet window 110, and at least some of the oscillating blades 214 in the oscillating blade assembly 210 have different orientations.

[0034] According to the embodiments of this application, the tower fan includes at least two oscillating blade assemblies 210, and the oscillating blades 214 of the oscillating blade assemblies 210 are not completely synchronized. This ensures that the oscillating blades 214 of multiple oscillating blade assemblies 210 can reach the corresponding areas sequentially, thereby increasing the airflow frequency of the tower fan. For the user, the oscillating blades 214 of different oscillating blade assemblies 210 blow airflow toward the user's area sequentially, which can multiply the airflow frequency experienced by the user, greatly extending the effective airflow time of the tower fan and improving the airflow effect.

[0035] When there are two sets of oscillating blade assemblies 210, the airflow frequency for the user experience can be doubled. The increase in frequency is more pronounced when there are more oscillating blade assemblies 210. Clearly, the number of oscillating blade assemblies 210 is not limited; two sets result in a relatively simple structure, but the number can also be three or more. Considering that tower fans generally have a larger dimension in the height direction, multiple sets of oscillating blade assemblies 210 can be distributed along the height direction as shown in Figure 1. Alternatively, multiple sets of oscillating blade assemblies 210 can also be distributed along the width direction of the air outlet window 110.

[0036] Furthermore, "the orientation of the blades 214 in at least some of the blade assemblies 210 is not synchronized" includes the following situations: the orientation of the blades 214 in all blade assemblies 210 is not synchronized; or, the orientation of the blades 214 in some blade assemblies 210 is synchronized, while the orientation of the blades 214 in some blade assemblies 210 is not synchronized. For example, when three sets of blade assemblies 210 are arranged along the height direction, the middle blade assembly 210 may swing in one direction, while the blade assemblies 210 at the upper and lower positions may swing in another direction.

[0037] It is worth mentioning that the frequencies of the multiple oscillating blade components 210 can be completely synchronized, in which case the oscillation period or period variation of the different oscillating blade components 210 is exactly the same. Of course, the multiple oscillating blade components 210 can also have different frequencies, in which case the oscillation frequency of some oscillating blade components 210 is higher than that of others. For example, the oscillation frequency of the upper oscillating blade component 210 can be lower than that of the lower oscillating blade component 210, thus the user will feel a relatively lower airflow frequency on their head, which can improve comfort while ensuring the airflow effect.

[0038] According to one embodiment of this application, referring to Figure 2, the oscillating blade assembly 210 includes an upper oscillating blade assembly 211 and a lower oscillating blade assembly 212. In this case, the oscillation direction of the oscillating blades 214 of the upper oscillating blade assembly 211 can be exactly opposite to the oscillation direction of the oscillating blades 214 of the lower oscillating blade assembly 212. That is, when the oscillating blades 214 of the upper oscillating blade assembly 211 oscillate to the first limit angle of the air outlet window 110, the oscillating blades 214 of the lower oscillating blade assembly 212 oscillate to the second limit angle of the air outlet window 110. The first limit angle and the second limit angle are limit angles in opposite directions along the width direction of the air outlet window 110. In this case, the airflow frequency of each area is relatively uniform, which can ensure a better airflow experience for the user.

[0039] Referring to Figures 1 and 2, the air outlet window 110 is equipped with an air outlet frame 300. The air outlet frame 300 includes a top crossbeam 310 and a bottom crossbeam 320. A middle crossbeam 400 is fixed in the middle of the air outlet frame 300. The upper swashplate assembly 211 is installed between the top crossbeam 310 and the middle crossbeam 400, and the lower swashplate assembly 212 is installed between the bottom crossbeam 320 and the middle crossbeam 400. The air outlet frame 300 and the middle crossbeam 400 facilitate the overall disassembly and assembly of the air outlet grille 200. The air outlet grille 200, along with the air outlet frame 300, can be removed from the unit body 100. Alternatively, the air outlet grille 200 can be pre-installed onto the air outlet frame 300 during installation, facilitating disassembly, assembly, and cleaning of the air outlet grille 200. Similarly, when the sway vane assembly 210 includes a left sway vane assembly 210 and a right sway vane assembly 210, a central vertical beam can be fixed in the middle of the air outlet frame 300, and the left sway vane assembly 210 can be installed between the left vertical beam and the central vertical beam, while the right sway vane assembly 210 can be installed between the right vertical beam and the central vertical beam.

[0040] According to an embodiment of this application, the central crossbeam 400 is detachably mounted to the air outlet frame 300. In this case, the upper swashplate assembly 211 and the lower swashplate assembly 212 can be disassembled and assembled as a single unit via the central crossbeam 400. Alternatively, if it is desired to disassemble and assemble the upper swashplate assembly 211 and the lower swashplate assembly 212 separately, two central crossbeams 400 can be provided.

[0041] Referring to Figure 2, fixing blocks 430 are provided at both ends of the central crossbeam 400, and fixing holes 330 are provided in the air outlet frame 300. The fixing blocks 430 are fixed in the fixing holes 330. The fit between the fixing blocks 430 and the fixing holes 330 facilitates the assembly and disassembly of the central crossbeam 400, and the structure is simple. The two sides of the fixing blocks 430 are inclined to form guide surfaces 431, that is, the horizontal cross section of the fixing blocks 430 has a trapezoidal structure, and its dimension is smaller on the side facing the fixing holes 430, to facilitate the installation of the fixing blocks 430. Furthermore, in Figure 2, the middle part of the central crossbeam 400 can be embedded into the fixing groove 340 to ensure installation reliability.

[0042] Please refer to Figures 3 and 4. In conjunction with Figure 2, the top of the air outlet frame 300 is provided with a first opening groove 311, and the bottom of the air outlet frame 300 is provided with a second opening groove 321. The upper surface of the middle crossbeam 400 is provided with a first pin 410, and the lower surface of the middle crossbeam 400 is provided with a second pin 420. The top of the blades 214 of the upper blade assembly 211 is provided with a first rotating shaft 2111 that can be installed into the first opening groove 311. The bottom of the blades 214 of the upper blade assembly 211 is provided with a first mounting hole 2112 that rotatably engages with the first pin 410. The top of the blades 214 of the lower blade assembly 212 is provided with a second mounting hole 2122 that engages with the second pin 420. The bottom of the blades 214 of the lower blade assembly 212 is provided with a second rotating shaft 2121 that can be installed into the second opening groove 321. In other words, for the upper swing blade assembly 211, during installation, the first pin 410 is first inserted into the first mounting hole 2112, and then the swing blade 214 is rotated so that the first rotating shaft 2111 rotates into the first opening groove 311. Thus, both ends of the upper swing blade assembly 211 are positioned by the cooperation of the first pin 410 and the first mounting hole 2112, and are assembled and disassembled by the cooperation of the first rotating shaft 2111 and the first opening groove 311, making assembly and disassembly convenient. Clearly, the positions of the first pin 410 and the first mounting hole 2112 can be interchanged; that is, the first pin 410 can be located at the bottom of the blade 214 of the upper blade assembly 211, and the first mounting hole 2112 can be located on the middle crossbeam 400. Similarly, the positions of the first rotating shaft 2111 and the first opening slot 311 can be interchanged; that is, the first rotating shaft 2111 can be located on the top crossbeam 310, and the first opening slot 311 can be located at the top of the blade 214 of the upper blade assembly 211. Alternatively, the first pin 410 and the first mounting hole 2112 can be located at the top of the upper blade assembly 211, while the first rotating shaft 2111 and the first opening slot 311 can be located at the bottom of the upper blade assembly 211. As for the lower blade assembly 212, like the upper blade assembly 211, the positions of the second pin 420, the second mounting hole 2122, the second rotating shaft 2121, and the second opening slot 321 are not limited by the current drawing, and their positions can also be interchanged.

[0043] The first rotating shaft 2111 and the first pin 410 are coaxial to ensure that the blades 214 of the upper blade assembly 211 oscillate around the first rotating shaft 2111 and the first pin 410. Similarly, the second rotating shaft 2121 and the second pin 420 are coaxial to ensure that the blades 214 of the lower blade assembly 212 oscillate around the second rotating shaft 2121 and the second pin 420.

[0044] Please refer to Figures 3 and 4. Both the first opening groove 311 and the second opening groove 321 are provided with a guide section 3111 and a rotating section 3112. The first rotating shaft 2111 and the second rotating shaft 2121 both enter the rotating section 3112 along the guide section 3111 and are rotatably mounted on the rotating section 3112. The guide section 3111 is tapered towards the rotating section 3112 so that the rotating shaft (the first rotating shaft 2111 or the second rotating shaft 2121) can enter the guide section 3111 through a wider opening and enter the rotating section 3112 under the action of the tapered guide section 3111.

[0045] According to embodiments of this application, multiple oscillating blade assemblies 210 can be driven by motors (refer to the first motor 500 and the second motor 600 described below), although manual operation is also possible. When the oscillating blade assemblies 210 are connected to motors, different motors are generally used for oscillating blade assemblies 210 with asynchronous orientations to ensure the independence of their driving. Each motor can be equipped with a separate switch for independent control. In this case, different oscillating blade assemblies 210 can be turned on independently, allowing the user to choose to turn on only some of them. For example, in a space where only children are present, a parent can choose to turn on only some of the lower oscillating blade assemblies 210, without turning on the top ones. Alternatively, a single switch can control multiple motors, but at least some of the motors can have asynchronous phases to ensure asynchronous orientations of the oscillating blade assemblies 210. Or, when a single switch controls multiple motors, the motors can also have synchronous phases, in which case a transmission structure can be used to ensure different orientations of the oscillating blade assemblies.

[0046] According to an embodiment of this application, please refer to Figures 3 and 4. The tower fan includes a power-coupled motor and a drive link 700. The drive link 700 is provided with a third opening slot 720, and the oscillating blades 214 are provided with connecting rods 213. The third opening slot 720 and the connecting rod 213 correspond one-to-one and are rotatably coupled. The connecting rod 213 is not coaxial with either the first rotating shaft 2111 or the second rotating shaft 2121. In this embodiment, a single drive link 700 can drive all the oscillating blades 214 of a set of oscillating blade assemblies 210 to swing synchronously. Its structure is simple and highly stable, equivalent to forming a four-bar linkage between the oscillating blades 214, the drive link 700, and the central crossbeam 400. To facilitate the assembly between the third opening slot 720 and the connecting rod 213, the third opening slot 720 may also include a guide section 3111 and a rotating section 3112.

[0047] In Figure 1, the tower fan includes a first motor 500 and a second motor 600. The drive linkage 700 includes a first drive linkage and a second drive linkage. The first motor 500 is connected to the first drive linkage, and the second motor 600 is connected to the second drive linkage. The first drive linkage is located at the top of the upper swashplate assembly 211, and the second drive linkage is located at the bottom of the lower swashplate assembly 212. In this configuration, it is equivalent to having two motors positioned at the upper and lower ends of the air outlet window 110, respectively. The relatively large distance between the two motors helps to ensure the structural stability of the tower fan as much as possible and effectively controls motor noise.

[0048] In this embodiment, a single motor can simultaneously drive two counter-rotating oscillating blade assemblies 210. In this case, a reversing mechanism can be provided at the output end of the motor, allowing the motor to ultimately output two driving forces in opposite directions to drive the upper oscillating blade assembly 211 and the lower oscillating blade assembly 212 respectively. For example, the output shaft of the motor drives the drive link 700 of the upper oscillating blade assembly 211, and the output shaft of the motor is dynamically coupled to the transmission shaft through a reversing gear assembly to ensure that the rotation directions of the transmission shaft and the output shaft are opposite, and the drive link 700 of the lower oscillating blade assembly 212 is connected through the transmission shaft. Alternatively, the output shaft of the motor can be connected to the drive link 700 of the lower oscillating blade assembly 212, and the transmission shaft can be connected to the drive link 700 of the upper oscillating blade assembly 211.

[0049] Furthermore, the motor, drive link 700, and connecting rod 213 can be positioned at any location corresponding to the oscillating blade assembly 210, as long as the oscillating blade assembly 210 can be driven to swing via the connecting rod 213. For example, the first motor 500, the connecting rod 213 of the upper oscillating blade assembly 211, and the drive link 700 can be positioned in the middle or bottom of the upper oscillating blade assembly 211; the second motor 600, the connecting rod 213 of the lower oscillating blade 214, and the drive link 700 can be positioned at the top or middle of the lower oscillating blade assembly 212.

[0050] According to an embodiment of this application, referring to Figures 5 and 6, the drive link 700 is formed with a lever 710, which has a mounting groove 711. An eccentric wheel 800 is connected to the output end of the motor. The inner surface of the eccentric wheel 800 and the mounting groove 711 cooperate to swing the drive link 700. As the eccentric wheel 800 rotates, its surface and the inner surface of the mounting groove 711 become tangent at different positions, causing the drive link 700 to swing. For the upper swing blade assembly 211, during its swing, the first pin 410 and the first rotating shaft 2111 serve as the center of swing. During the swing, the swing blades 214 of the upper swing blade assembly 211 can be well hidden within the air outlet frame 300, ensuring aesthetics and safety. Similarly, for the lower swing blade assembly 212, its swing blades 214 are also hidden within the air outlet frame 300 during the swing.

[0051] Referring to Figures 5 and 6, the motor and drive linkage 700 are installed on the inner side of the air outlet frame 300, which can protect the motor and drive linkage 700.

[0052] In addition to the structure of eccentric wheel 800 and mounting groove 711, embodiments of this application may also use a crank-rocker structure to drive the pendulum 214. The pendulum 214, as the driven rod in the crank-rocker, swings around the rotation center under the action of the driving rod.

[0053] Furthermore, it should be noted that the tower fan in this application embodiment can be used for cooling or for both cooling and heating.

[0054] Finally, it should be noted that the above embodiments are for illustrative purposes only and are not intended to limit the scope of this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the scope of the technical solutions of this application and should be covered by the scope of the claims of this application.

Claims

1. A tower fan, comprising: The body has air outlet windows; An air outlet grille is installed at the air outlet window. The air outlet grille includes at least two sway blade assemblies. Each sway blade assembly includes multiple sway blades extending in a vertical direction. The sway blades swing along the width direction of the air outlet window, and the sway blades in at least some of the sway blade assemblies are not aligned synchronously.

2. The tower fan according to claim 1, wherein, The oscillating blade assembly includes an upper oscillating blade assembly and a lower oscillating blade assembly. The air outlet window is equipped with an air outlet frame, which includes a top crossbeam and a bottom crossbeam. A middle crossbeam is fixed in the middle of the air outlet frame. The upper oscillating blade assembly is installed between the top crossbeam and the middle crossbeam, and the lower oscillating blade assembly is installed between the bottom crossbeam and the middle crossbeam.

3. The tower fan according to claim 2, wherein, The central crossbeam can be detachably installed on the air outlet frame.

4. The tower fan according to claim 2 or 3, wherein, Fixing blocks are provided at both ends of the central crossbeam, and fixing holes are provided in the air outlet frame, with the fixing blocks fixed in the fixing holes.

5. The tower fan according to any one of claims 2 to 4, wherein, The top of the air outlet frame is provided with a first opening slot, and the bottom of the air outlet frame is provided with a second opening slot. The upper surface of the middle crossbeam is provided with a first pin, and the lower surface of the middle crossbeam is provided with a second pin. The top of the blades of the upper blade assembly is provided with a first rotating shaft that can be installed into the first opening slot, and the bottom of the blades of the upper blade assembly is provided with a first mounting hole that rotatably engages with the first pin. The top of the blades of the lower blade assembly is provided with a second mounting hole that engages with the second pin, and the bottom of the blades of the lower blade assembly is provided with a second rotating shaft that can be installed into the second opening slot.

6. The tower fan according to claim 5, wherein, Both the first opening slot and the second opening slot are provided with a guide section and a rotating section. Both the first rotating shaft and the second rotating shaft enter the rotating section along the guide section and are rotatably mounted on the rotating section.

7. The tower fan according to claim 5 or 6, wherein, The tower fan also includes a power-coupled motor and a drive link. The drive link is provided with a third opening slot, and the oscillating blade is provided with a connecting rod. The third opening slot and the connecting rod correspond one-to-one and are rotatably engaged. The connecting rod is not coaxial with the first rotating shaft or the second rotating shaft.

8. The tower fan according to claim 7, wherein, The tower fan also includes a first motor and a second motor. The drive linkage includes a first drive linkage and a second drive linkage. The first motor is connected to the first drive linkage, and the second motor is connected to the second drive linkage. The first drive linkage is located at the top of the upper swing blade assembly, and the second drive linkage is located at the bottom of the lower swing blade assembly.

9. The tower fan according to claim 7 or 8, wherein, The drive link is provided with a mounting groove, and the output end of the motor is connected to an eccentric wheel. The eccentric wheel and the inner surface of the mounting groove cooperate to swing the drive link.

10. The tower fan according to any one of claims 2 to 6, wherein, When the upper blade assembly swings to the first limit angle of the air outlet window, the lower blade assembly swings to the second limit angle of the air outlet window. The first limit angle and the second limit angle are limit angles in opposite directions along the width direction of the air outlet window.

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