Fan

Abstract

The present invention provides a fan, comprising: a frame-shaped shell, comprising a first group of opposite sides and a second group of opposite sides forming a hollow frame, the frame-shaped shell defines an internal channel, the first group of opposite sides are each provided with at least one air inlet and at least one air outlet, and at least one side of the first group of opposite sides and the second group of opposite sides away from the periphery of the central through hole is provided with a first magnetic attraction component; two cross-flow fans, respectively located in the internal channels of the first group of opposite sides, and placed downstream of the air inlet, the impellers of the cross-flow fans rotate to draw airflow through the air inlet into the internal channel, and at least a part of the airflow is emitted from the air outlet; a support seat, the upper surface of the support seat is provided with a second magnetic attraction component, which is magnetically attracted and supported by the magnetic attraction component of the first group of opposite sides or one of the first magnetic attraction components of the second group of opposite sides. The present invention can quickly switch between multiple air outlet use states, effectively expand the air outlet width based on the horizontal plane, and enhance the use scenario of the fan.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration equipment, in particular to a fan. Background Art

[0002] Traditional fans usually include a motor, blades, a base or a fixing frame, a power supply, etc. When the power is turned on, the motor rotates, driving the blades on the motor shaft to rotate. The rotating blades generate airflow, so as the heat is taken away by convection and evaporation, the user feels the cooling effect within the range of the airflow.

[0003] However, due to the limitation of the working principle of the vertical impeller, the core component of a conventional cross-flow fan, the air is discharged in vertical strips, which makes the air outlet width based on the horizontal plane narrow, and it is difficult to obtain a wide air outlet range based on the horizontal plane; if the angle of the air outlet is simply diffused, the air pressure at the air outlet will decrease rapidly, the wind force will be significantly weakened, or a high-speed motor will be required, which increases noise.

[0004] Therefore, the present invention provides a fan. Summary of the invention

[0005] In response to the problems in the prior art, the purpose of the present invention is to provide a fan that overcomes the difficulties of the prior art, can quickly switch between multiple air outlet usage states, effectively expands the air outlet width based on the horizontal plane, and enhances the use scenarios of the fan.

[0006] An embodiment of the present invention provides a fan, comprising

[0007] A frame-shaped shell, comprising a first set of opposite sides and a second set of opposite sides forming a hollow frame, the frame-shaped shell defining an internal passage, the first set of opposite sides each having at least one air inlet and at least one air outlet, and the first set of opposite sides and the second set of opposite sides each having at least one side facing away from the periphery of the central through hole having a first magnetic attraction component;

[0008] two crossflow fans, respectively located in the internal passages of the first set of opposite sides and placed downstream of the air inlet, the impellers of the crossflow fans rotating to draw airflow through the air inlet into the internal passages, and at least a portion of the airflow being emitted from the air outlet;

[0009] A support base, wherein the upper surface of the support base is provided with a second magnetic component, which is magnetically attracted to and supported by one of the magnetic components of the first group of opposite sides or the first magnetic components of the second group of opposite sides.

[0010] Preferably, the first magnetic attraction component and the second magnetic attraction component are respectively a first magnetic attraction array and a second magnetic attraction array formed by a plurality of magnetic attraction points arranged in an array with the same spacing, and the area of the first magnetic attraction array is smaller than the area of the second magnetic attraction array.

[0011] Preferably, the upper surface of the support seat is provided with an arc groove, and the second magnetic attraction array is embedded in the arc groove;

[0012] The first group of opposite sides and the second group of outer circumferences are respectively provided with arc shells, the first magnetic attraction array is embedded in the arc shells, and the arc shells are magnetically attracted to the arc grooves and in surface contact.

[0013] Preferably, as the arc housing rotates along the arc groove, the air outlet angle of the crossflow fan based on the vertical plane is changed.

[0014] Preferably, the first magnetic attraction component is a magnetic bearing socket, and the second magnetic attraction component includes a magnetic plug rod, and the magnetic plug rod is rotatably plugged into and magnetically attracted to the magnetic bearing socket.

[0015] Preferably, the air inlet is a plurality of strip-shaped holes parallel to each other along the first direction;

[0016] The air outlet is a plurality of strip-shaped holes parallel to each other along a second direction, and the second direction is perpendicular to the first direction.

[0017] Preferably, the frame-type shell includes a front shell and a rear shell connected to each other, the cavity formed by the front and rear shells forms the internal channel, the air inlet is located on the rear shell, the air outlet is located at least on the front shell, and the area of the air inlet is larger than the area of the air outlet.

[0018] Preferably, the air inlet is an L-shaped opening, and the L-shaped opening includes a first strip hole arranged on a side away from the air outlet and a second strip hole arranged on the periphery.

[0019] Preferably, the impellers of the crossflow fans have the same rotation speed and opposite rotation directions.

[0020] Preferably, a filter and a heating device are provided in the frame-shaped shell, the filter is located downstream of the air inlet and between the air inlet and the cross-flow fan, and the heating device is located upstream of the air outlet and between the air outlet and the cross-flow fan.

[0021] Preferably, the air outlet is provided with a transverse air guide grille and a longitudinal air guide grille, and a motion detection sensor is provided in the frame-type shell. When it detects that the frame-type shell is rotated 90° based on the horizontal axis, the first control signal for controlling the transverse air guide grille is exchanged with the second control signal for controlling the longitudinal air guide grille.

[0022] The fan of the present invention can quickly switch between a variety of air outlet usage states, effectively expand the air outlet width based on the horizontal plane, and enhance the use scenarios of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non - limiting embodiments read in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the first usage state of the fan of the present invention.

[0025] Figure 2 is Figure 1 The sectional view along the A - A direction in

[0026] Figure 3 It is a side view of the fan of the present invention.

[0027] Figure 4 It is a schematic diagram of the second usage state of the fan of the present invention.

[0028] Figure 5 It is a schematic diagram of the fan of the present invention having a plurality of first magnetic attraction arrays.

[0029] Figure 6 It is a side view of the third usage state of the arc - shaped housing and arc - shaped groove of the fan of the present invention in cooperation.

[0030] Figure 7 It is a schematic diagram of the second magnetic attraction array.

[0031] Figure 8 It is a schematic diagram of the first magnetic attraction array.

[0032] Figure 9 is Figure 6 The schematic diagram of the magnetic attraction alignment between the first magnetic attraction array and the second magnetic attraction array in

[0033] Figure 10 It is a side view of the fourth usage state of the arc - shaped housing and arc - shaped groove of the fan of the present invention in cooperation.

[0034] Figure 11 is Figure 10 The schematic diagram of the magnetic attraction alignment between the first magnetic attraction array and the second magnetic attraction array in

[0035] Figure 12 It is a perspective view of the first usage state of another fan of the present invention.

[0036] Figure 13 It is a combined view of the first usage state of another fan of the present invention.

[0037] Figure 14 It is a front view of the first usage state of another fan of the present invention.

[0038] Figure 15 is Figure 14 The sectional view along the B - B direction in

[0039] Figure 16 is Figure 14 a sectional view along the C-C direction in

[0040] Figure 17 a sectional view of the first use state of another fan of the present invention.

[0041] Figure 18 an exploded view of another fan of the present invention.

[0042] Figure 19 a combined view of the second use state of another fan of the present invention.

[0043] Figure 20 a front view of the second use state of another fan of the present invention.

[0044] Figure 21 is Figure 20 a sectional view along the D-D direction in

[0045] Figure 22 a schematic diagram of a cross-flow fan in another fan of the present invention.

[0046] Figure 23 an exploded view of a cross-flow fan in another fan of the present invention.

[0047] Reference numerals

[0048] 1 Frame-shaped housing

[0049] 10 Central through hole

[0050] 11 Cross-flow fan

[0051] 111 Bearing fixing silica gel ring

[0052] 112 Impeller

[0053] 113 Shock-absorbing buffer

[0054] 114 Motor

[0055] 115 Bearing

[0056] 12 Air inlet

[0057] 121 Second strip-shaped hole

[0058] 122 First strip-shaped hole

[0059] 13 Air outlet

[0060] 14 Arc-shaped housing

[0061] 15 First magnetic attraction array

[0062] 151 - 153 Magnetic attraction points

[0063] 16 Air outlet housing

[0064] 17 Outer housing

[0065] 18 Middle frame

[0066] 19 Rear shell

[0067] 191 Impeller fixing bracket

[0068] 2 Support seat

[0069] 21 Second magnetic attraction array

[0070] 211 - 217 Magnetic attraction points

[0071] 22 Arc groove

[0072] 31 First pair of opposite sides

[0073] 32 Upper edge part

[0074] 33 Lower edge part

[0075] 41 Magnetic plug

[0076] 42 Magnetic bearing socket

[0077] 43 Magnetic bearing socket

[0078] 51 PCB bracket

[0079] 52 First PCB board

[0080] 53 Second PCB board

[0081] 54 Power cord Detailed implementation manners

[0082] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus their repetitive description will be omitted.

[0083] Figure 1 It is a schematic diagram of the first usage state of the fan of the present invention. Figure 2 is Figure 1 a sectional view taken along the A - A direction. Figure 3 It is a side view of the fan of the present invention. As Figures 1 to 3As shown, the fan of the present invention comprises: a frame-shaped housing 1, two cross-flow fans 11 and a support base 2. The frame-shaped housing 1 comprises a first set of opposite sides 31 and a second set of opposite sides (including an upper side portion 32 and a lower side portion 33) forming a hollow frame, the frame-shaped housing 1 defines an internal channel, the first set of opposite sides 31 are each provided with at least one air inlet 12 and at least one air outlet 13, and the first set of opposite sides 31 and the second set of opposite sides are each provided with a first magnetic attraction component on at least one side of the outer periphery away from the central through hole 10. The two cross-flow fans 11 are respectively located in the internal channel of the first set of opposite sides 31 and are placed downstream of the air inlet 12. The impellers of the cross-flow fans 11 rotate to draw airflow through the air inlet 12 into the internal channel. The impellers of the cross-flow fans 11 rotate at the same speed and in opposite directions, and at least a portion of the airflow is emitted from the air outlet 13. The upper surface of the support seat 2 is provided with a second magnetic attraction component, which is magnetically attracted to and supported by the magnetic attraction component of the first group of opposite sides 31 or one of the first magnetic attraction components of the second group of opposite sides. In this embodiment, the first magnetic attraction component and the second magnetic attraction component are respectively a first magnetic attraction array 15 and a second magnetic attraction array 21 formed by a plurality of magnetic attraction points arranged in an array with the same spacing, but the present invention is not limited thereto.

[0084] See also Figure 1 In the first usage state (equivalent to vertical use), the second magnetic attraction component on the upper surface of the support seat 2 is magnetically aligned with the magnetic attraction component on the lower edge 33 and supports the entire frame-type shell 1. At this time, the air outlet 13 of the fan extends along the plumb line, and the horizontal air outlet width is narrow.

[0085] In a preferred embodiment, the air inlet 12 is a plurality of strip-shaped holes parallel to each other along a first direction, and the air outlet 13 is a plurality of strip-shaped holes parallel to each other along a second direction, and the second direction is perpendicular to the first direction.

[0086] In a preferred embodiment, the frame-type shell 1 includes a front shell and a rear shell connected to each other, the cavity formed by the front and rear shells forms an internal channel, the air inlet 12 is located on the rear shell, and the air outlet 13 is located at least on the front shell, and the area of the air inlet 12 is larger than the area of the air outlet 13.

[0087] In a preferred embodiment, the air inlet 12 is an L-shaped opening, and the L-shaped opening includes a first strip hole 121 arranged on a side away from the air outlet 13 and a second strip hole 122 arranged on the periphery.

[0088] In a preferred embodiment, a filter (not shown in the figure) and a heating device (not shown in the figure) are provided in the frame-shaped shell 1. The filter is located downstream of the air inlet 12 and between the air inlet 12 and the cross-flow fan 11. The heating device is located upstream of the air outlet 13 and between the air outlet 13 and the cross-flow fan 11.

[0089] Figure 4FIG. 1 is a schematic diagram of a second use state of the fan of the present invention. Figure 1 and 4 As shown, after the second magnetic attraction component of the support base 2 is separated from the magnetic attraction component of the lower edge 33, the second magnetic attraction component on the upper surface of the support base 2 is magnetically aligned with the magnetic attraction component of the first group of opposite sides 31 to realize the second usage state (equivalent to horizontal use), and the support base 2 can still support the frame-type shell 1. At this time, the air outlet 13 of the fan extends along the horizontal line, and the air outlet width in the horizontal direction is greatly widened. Therefore, the present invention can change the extension direction of the air outlet 13 of the fan by changing the long side or short side of the support base 2 and the frame-type shell 1 for magnetic attraction, thereby quickly switching between two air outlet states with different uses, greatly enhancing the use scenario of the fan.

[0090] In another preferred embodiment, the air outlet 13 is provided with a transverse air guide grille (not shown in the figure) and a longitudinal air guide grille (not shown in the figure), and the fan can be used with a dedicated remote control or a mobile phone remote control, but because the fan can be switched between vertical and horizontal positions, this will cause the actual functions of the transverse air guide grille and the longitudinal air guide grille used to control the wind direction of the air to be replaced. In order to overcome this technical problem, a motion detection sensor is also provided in the frame-type housing 1 of the present invention, which can detect the motion posture of the frame-type housing 1 relative to the horizontal axis. When it is detected that the frame-type housing 1 rotates 90° based on the horizontal axis, the first control signal for controlling the transverse air guide grille and the second control signal for controlling the longitudinal air guide grille can be automatically exchanged, so that the first control signal originally controlling the transverse air guide grille is applied to the longitudinal air guide grille, and the second control signal originally controlling the longitudinal air guide grille is applied to the transverse air guide grille. Therefore, when switching between vertical and horizontal positions, the control signals for the transverse air guide grille and the longitudinal air guide grille can also be switched in time, ensuring that the user's experience is not disturbed by the switching of the fan's use state (vertical use or horizontal use).

[0091] Figure 5 FIG. 1 is a schematic diagram of a fan of the present invention having a plurality of first magnetic attraction arrays. Figure 5 As shown, in a preferred case, the fan of the present invention may also be provided with a first magnetic array 15 on both sides of the first group of opposite sides 31 and the second group of opposite sides respectively facing away from the outer periphery of the central through hole 10, so that the second magnetic array 21 of the support seat 2 can be magnetically attracted to any edge of the frame shell 1 to provide a blind plug effect.

[0092] The cooperation between the first magnetic component and the second magnetic component in the present invention can not only provide a rotation effect of the air outlet, but also realize the change of the air outlet angle based on the vertical plane through the limiting cooperation of the magnetic attraction between the first magnetic component and the second magnetic component.

[0093] Figure 6The third usage state side view of the arc-shaped outer shell and the arc-shaped groove of the fan of the present invention. Figure 7 Schematic diagram of the second magnetic attraction array. Figure 8 Schematic diagram of the first magnetic attraction array. Figure 9 For Figure 6 Schematic diagram of the magnetic attraction alignment of the first magnetic attraction array and the second magnetic attraction array in Figures 6 to 9 As shown, in the fan of the present invention, the first magnetic attraction component and the second magnetic attraction component are respectively the first magnetic attraction array 15 and the second magnetic attraction array 21 formed by arranging a plurality of magnetic attraction points in an array with the same pitch. An arc-shaped groove 22 is provided on the upper surface of the support base 2, and the second magnetic attraction array 21 is embedded in the arc-shaped groove 22. Arc-shaped outer shells 14 are respectively provided on the outer circumferences of the first set of opposite sides 31 and the second set, and the first magnetic attraction array 15 is embedded in the arc-shaped outer shell 14. The arc-shaped outer shell 14 and the arc-shaped groove 22 are magnetically attracted and in surface contact.

[0094] In this embodiment, along the direction of air passing through the fan, the first magnetic attraction array 15 successively includes 9 magnetically attracted points arranged in a 3-row and 3-column matrix (including 3 rows of magnetically attracted points 151, 152, 153), and the second magnetic attraction array 21 successively includes 21 magnetically attracted points arranged in a 7-row and 3-column matrix (including 7 rows of magnetically attracted points 211, 212, 213, 214, 215, 216, 217). The sizes and pitches of all the magnetically attracted points in the first magnetic attraction array 15 and the second magnetic attraction array 21 are equal. Refer to Figure 9 , in the third usage state, the first magnetic attraction array 15 (3 rows of magnetically attracted points 151, 152, 153) is magnetically attracted to the 3 central rows of magnetically attracted points (3 rows of magnetically attracted points 213, 214, 215) of the second magnetic attraction array 21. At this time, the air F is ejected from the fan in the horizontal direction.

[0095] Figure 10 The fourth usage state side view of the arc-shaped outer shell and the arc-shaped groove of the fan of the present invention. Figure 11 For Figure 10 Schematic diagram of the magnetic attraction alignment of the first magnetic attraction array and the second magnetic attraction array in Figure 10 And 11, To adjust the air outlet angle of the cross-flow fan 11, the arc-shaped housing 14 is rotated along the arc groove 22, and the first magnetic attraction array 15 is slid from the three central magnetic attraction points (the three magnetic attraction points 213, 214, 215) of the second magnetic attraction array 21 to the three outermost magnetic attraction points (the three magnetic attraction points 215, 216, 217) of the second magnetic attraction array 21. As the arc-shaped housing 14 rotates along the arc groove 22, the air outlet angle of the cross-flow fan 11 based on the vertical plane is gradually changed. Thanks to the damping brought by the suction force jointly provided by the magnetic attraction points between the magnetic attraction arrays during the entire sliding process, the frame-shaped housing 1 can maintain the inclined fourth usage state, thereby achieving the effect of blowing air upward. Thus, without the need to install a wind guide, the air outlet angle in the vertical direction can also be changed, further improving the function of the fan and enhancing the usage scenarios of the fan.

[0096] Figure 12 Is a perspective view of another first usage state of the fan of the present invention. Figure 13 Is a combined view of another first usage state of the fan of the present invention. Figure 14 Is a front view of another first usage state of the fan of the present invention. Figure 15 Is Figure 14 The cross-sectional view along the B-B direction in Figure 16 Is Figure 14 The cross-sectional view along the C-C direction in Figure 17 Is a cross-sectional view of another first usage state of the fan of the present invention. Figure 18 Is an exploded view of another fan of the present invention. As Figures 12 to 18As shown, another fan of the present invention is provided, comprising: a frame-type housing 1, two cross-flow fans 11, a support seat 2, a PCB bracket 51, a first PCB board 52, a second PCB board 53 and a power cord 54. The frame-type housing 1 comprises an air outlet housing 16, an outer housing 17, a middle frame 18 and a rear housing 19 which are connected and assembled along the airflow direction, and the rear housing 19 is provided with an impeller fixing frame 191 for fixing the cross-flow fan 11. The frame-type housing 1 comprises a first group of opposite sides 31 and a second group of opposite sides (including an upper side portion 32 and a lower side portion 33) forming a hollow frame, the frame-type housing 1 defines an internal channel, the first group of opposite sides 31 are respectively provided with at least one air inlet 12 and at least one air outlet 13, and the first group of opposite sides 31 and the second group of opposite sides are respectively provided with a first magnetic attraction component on at least one side of the outer periphery away from the central through hole 10. The two crossflow fans 11 are respectively located in the internal channels of the first group of opposite sides 31 and are placed downstream of the air inlet 12. The impellers of the crossflow fans 11 rotate to draw airflow through the air inlet 12 into the internal channels. The impellers of the crossflow fans 11 rotate at the same speed and in opposite directions. At least a portion of the airflow is emitted from the air outlet 13. A second magnetic attraction component is provided on the upper surface of the support seat 2, which is magnetically attracted and supported by the magnetic attraction component of the first group of opposite sides 31 or one of the first magnetic attraction components of the second group of opposite sides. In this embodiment, the magnetic attraction component of the first group of opposite sides 31 is a magnetic bearing socket 43, and the magnetic attraction component of the second group of opposite sides is a magnetic bearing socket 42. The second magnetic attraction component includes a magnetic plug rod 41, which is rotatably plugged and magnetically attracted to one of the magnetic bearing sockets 42 and 43, so that the frame-type shell 1 can rotate horizontally based on the magnetic plug rod 41.

[0097] See also Figure 15 When the magnetic plug rod 41 and the magnetic bearing socket 42 are rotatably plugged in and magnetically attracted, the support base 2 supports one side of the second set of opposite sides (short sides), which is equivalent to vertical use. The support base 2 supports the entire frame-type shell 1. At this time, the air outlet 13 of the fan extends along the plumb line, and the air outlet width in the horizontal direction is narrow.

[0098] Figure 19 This is a combination diagram of another fan in the second use state of the present invention. Figure 20 This is a front view of another fan of the present invention in a second usage state. Figure 21 for Figure 20 The cross-section along the DD direction in Fig. Figures 19 to 21As shown, when the magnetic plug 41 is rotatably inserted into and magnetically attracted to the magnetic bearing socket 43, the support base 2 supports one side of the first set of opposite sides (long sides). It is equivalent to using the support base 2 horizontally and still being able to support the frame-shaped housing 1. At this time, the air outlet 13 of the fan extends along the horizontal line, and the air outlet width in the horizontal direction is greatly broadened. Therefore, the present invention can change the magnetic attraction between the support base 2 and the long side or short side of the frame-shaped housing 1 to change the extension direction of the air outlet 13 of the fan, so as to quickly switch between two different air outlet states for different uses, greatly enhancing the usage scenarios of the fan.

[0099] Figure 22 It is a schematic diagram of a cross-flow fan in another fan of the present invention. Figure 23 It is an exploded view of a cross-flow fan in another fan of the present invention. See Figures 22 to 23 As shown, the cross-flow fan in the fan of the present invention includes a bearing fixing silica gel ring 111, an impeller 112, a shock-absorbing buffer body 113, a motor 114, and a bearing 115. The upper end of the impeller 112 is connected to the bearing 115 and the bearing fixing silica gel ring 111 for fixing the bearing 115. The lower end of the impeller 112 is provided with a shock-absorbing buffer body 113 and a motor 114 for driving the impeller 112 to rotate. When the cross-flow fan 11 works, the rotation speeds of the two impellers 112 are the same and the rotation directions are opposite, driving the air flow to spray out from the air outlet.

[0100] In summary, the purpose of the present invention is to provide a fan that can quickly switch between multiple air outlet usage states, effectively expand the air outlet width based on the horizontal plane, and enhance the usage scenarios of the fan.

[0101] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A fan, characterized in that, include: A frame-shaped shell (1), comprising a first group of opposite sides (31) and a second group of opposite sides forming a hollow frame, the frame-shaped shell (1) defining an internal channel, the first group of opposite sides (31) each being provided with at least one air inlet (12) and at least one air outlet (13), the first group of opposite sides (31) and the second group of opposite sides each being provided with a first magnetic attraction component on at least one side of the outer periphery away from the central through hole (10), the second group of opposite sides comprising an upper side portion (32) and a lower side portion (33), the air outlet (13) being provided with a transverse air guide grille and a longitudinal air guide grille, a motion detection sensor being provided inside the frame-shaped shell (1), and exchanging a first control signal for controlling the transverse air guide grille with a second control signal for controlling the longitudinal air guide grille when detecting that the frame-shaped shell (1) is rotated 90° based on a horizontal axis; two cross-flow fans (11), respectively located in the internal passages of the first set of opposite sides (31) and placed downstream of the air inlet (12), the impellers of the cross-flow fans (11) rotating to draw airflow through the air inlet (12) into the internal passages, and at least a portion of the airflow being emitted from the air outlet (13); and A support base (2), wherein the upper surface of the support base (2) is provided with a second magnetic component, which is magnetically attracted to and supported by the magnetic components of the first group of opposite sides (31) or one of the first magnetic components of the second group of opposite sides. In a first use state, the second magnetic component on the upper surface of the support base (2) is magnetically aligned with the magnetic component of the lower side (33), and the second magnetic component on the upper surface of the support base (2) is magnetically aligned with the magnetic component of the first group of opposite sides (31) to achieve a second use state.

2. The fan according to claim 1, wherein The first magnetic attraction component and the second magnetic attraction component are respectively a first magnetic attraction array (15) and a second magnetic attraction array (21) formed by a plurality of magnetic attraction points arranged in an array with the same spacing, and the area of the first magnetic attraction array (15) is smaller than the area of the second magnetic attraction array (21).

3. The fan according to claim 2, characterized in that The upper surface of the support seat (2) is provided with an arc groove (22), and the second magnetic attraction array (21) is embedded in the arc groove (22); The first group of opposite sides (31) and the second group of opposite sides are respectively provided with arc shells (14) on their outer peripheries, the first magnetic attraction array (15) is embedded in the arc shells (14), and the arc shells (14) are magnetically attracted to and in surface contact with the arc grooves (22).

4. The fan according to claim 3, wherein As the circular arc housing (14) rotates along the circular arc groove (22), the air outlet angle of the cross flow fan (11) based on the vertical plane changes.

5. The fan according to claim 1, characterized in that, The first magnetic attraction component is a magnetic bearing socket (42, 43), and the second magnetic attraction component comprises a magnetic insertion rod (41), and the magnetic insertion rod (41) and the magnetic bearing socket (42, 43) are rotatably plugged and magnetically attracted.

6. The fan according to claim 1, characterized in that, The air inlet (12) is a plurality of strip-shaped holes parallel to each other along a first direction; The air outlet (13) is a plurality of strip-shaped holes parallel to each other along a second direction, the second direction being perpendicular to the first direction, and the impellers of the cross-flow fans (11) have the same rotation speed and opposite rotation directions.

7. The fan according to claim 1, wherein, The frame-shaped shell (1) comprises a front shell and a rear shell connected to each other, the cavity formed by the front and rear shells forms the internal channel, the air inlet (12) is located on the rear shell, the air outlet (13) is located at least on the front shell, and the area of the air inlet (12) is larger than the area of the air outlet (13).

8. The fan according to claim 7, characterized in that, The air inlet (12) is an L-shaped opening, and the L-shaped opening comprises a first strip-shaped hole (121) arranged on a side away from the air outlet (13) and a second strip-shaped hole (122) arranged on the periphery, which are connected to each other.

9. The fan according to claim 1, characterized in that: A filter and a heating device are provided in the frame-shaped housing (1); the filter is located downstream of the air inlet (12) and between the air inlet (12) and the cross-flow fan (11); and the heating device is located upstream of the air outlet (13) and between the air outlet (13) and the cross-flow fan (11).

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