Anti-reversion cooling fan and server

Abstract

The invention discloses an anti-reversal cooling fan and a server, and relates to the technical field of cooling fans. The anti-reversion cooling fan comprises a motor stator, a motor rotor, fan blades and a one-way limiting device. The fan blades are arranged on the peripheral side surface of the motor rotor; the one-way limiting device is arranged between the motor rotor and the motor stator; when the one-way limiting device is located at the first position, the motor rotor can rotate in the forward direction or the reverse direction relative to the motor stator. When the one-way limiting device is located at the second position, the motor rotor can rotate in the forward direction relative to the motor stator and is locked in the reverse direction. The one-way limiting device is arranged, so that the motor rotor can rotate in the forward direction and be locked in the reverse direction relative to the motor stator, the motor rotor is prevented from reversing relative to the motor stator, and the anti-reversing cooling fan can be effectively protected; the anti-reversion cooling fan can be normally started under the condition that the surrounding airflow direction is opposite to the forward rotation airflow direction.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling fans, and in particular to an anti-reversal cooling fan. In addition, the present invention also relates to a server comprising the anti-reversal cooling fan. Background Art

[0002] The cooling fan is usually installed on the rear window of the server. As the power density of the server increases, the heat generated in the server increases, and the required system fan speed also increases accordingly. During the hot-swap maintenance of the fan, when the fan is inserted into the system, the fan inserted into the system will cause the fan to reverse due to the negative wind pressure in the system because the speed of other fans in the system is very high. The fan may not start normally due to the high reverse speed, or even cause damage to the fan. If the fan is always in a faulty state, the server system airflow cannot remove the heat, which will cause the temperature of the internal components of the server to rise, affecting the performance and service life of the components, and may even cause over-temperature protection and downtime.

[0003] In summary, how to prevent the cooling fan from being reversed when inserted into the system is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide an anti-reverse cooling fan, which can limit the motor rotor to rotate only in the forward direction relative to the motor stator through a one-way limit device, thereby preventing the cooling fan from reversing when inserted into the system.

[0005] In addition, another object of the present invention is to provide a server including the above-mentioned anti-reversal heat dissipation fan.

[0006] In order to solve the above technical problems, the present invention provides an anti-reverse cooling fan, comprising:

[0007] Motor stator;

[0008] A motor rotor, rotatably sleeved on the outer periphery of the motor stator around the axial direction of the motor;

[0009] Fan blades are arranged on the outer peripheral side of the motor rotor;

[0010] A one-way limit device, disposed between the motor rotor and the motor stator, the one-way limit device being switchable to a first position or a second position;

[0011] When the one-way limit device is located at the first position, the motor rotor can rotate relative to the motor stator in the forward direction or the reverse direction; when the one-way limit device is located at the second position, the motor rotor can rotate relative to the motor stator in the forward direction and be locked in the reverse direction.

[0012] On the one hand, the one-way limiting device comprises:

[0013] A first slot is provided on one of the motor rotor or the motor stator;

[0014] A first stop structure, movably disposed on the other of the motor rotor or the motor stator between the first position and the second position;

[0015] A first elastic supporting structure, one end of which is connected to the first stop structure, and the other end of which is connected to the first adjusting device;

[0016] The first adjustment device is disposed on the other of the motor rotor or the motor stator, and is used to adjust the telescopic state of the first elastic support structure so that the first stop structure switches to the first position or the second position.

[0017] On the other hand, the first adjustment device includes a limit ring and a limit block arranged on the limit ring, the limit ring is rotatably arranged on the other of the motor rotor or the motor stator between a first angle position and a second angle position; the first stop structure is rotatably arranged on the limit ring;

[0018] When the limiting ring rotates to the first angular position, the first elastic supporting structure is in a stretched state, and the first stopping structure is in the first position;

[0019] When the limiting ring rotates to the second angular position, the first elastic support structure is in a compressed state, the first stop structure is in the second position, and the first stop structure is in contact with the limiting block to limit the first stop structure from rotating toward the side close to the limiting block.

[0020] On the other hand, the limiting ring is sleeved on the outer circumference of the motor stator; the first adjustment device also includes an angle position adjustment component for controlling the rotation of the limiting ring, and the angle position adjustment component includes:

[0021] A first elastic member, one end of which is connected to the limiting ring, and the other end of which is connected to the motor stator;

[0022] A first electromagnet, wherein one of the limiting ring and the motor stator is provided with the first electromagnet, and the other of the limiting ring and the motor stator is provided with a first magnetic attraction member for being attracted to the first electromagnet;

[0023] When the first electromagnet is energized, the first electromagnet is attracted to the first magnetic attraction member, and the limit ring rotates to the first angular position; when the first electromagnet is de-energized, the first electromagnet is de-engaged from the first magnetic attraction member, and the limit ring rotates to the second angular position under the elastic force of the first elastic member.

[0024] On the other hand, it also includes:

[0025] A first information acquisition device, used to acquire the speed information and first direction information of the motor rotor;

[0026] A second information acquisition device, used to acquire the position information of the limit ring;

[0027] A controller is used to adjust the position of the limit ring according to the rotation speed information, the first steering information and the position information.

[0028] On the other hand, the first adjustment device includes a telescopic limiting structure, one end of the telescopic limiting structure is connected to the first stop structure, and the other end is connected to the other of the motor rotor or the motor stator; the first stop structure is rotatably disposed on the other of the motor rotor or the motor stator;

[0029] When the telescopic limiting structure is in an extended state, the first stopping structure rotates to the second position;

[0030] When the telescopic limiting structure is in a retracted state, the first stopping structure rotates to the first position.

[0031] On the other hand, the other end of the telescopic limit structure is connected to the motor stator; the first adjustment device also includes a second electromagnet for controlling the extension of the telescopic limit structure, the second electromagnet is arranged on one of the telescopic limit structure and the motor stator, and the other of the telescopic limit structure and the motor stator is provided with a second magnetic attraction member for attracting the second electromagnet;

[0032] When the second electromagnet is energized, the second electromagnet is attracted to the second magnetic attraction member, and the telescopic limiting structure is in a retracted state; when the second electromagnet is de-energized, the second electromagnet is de-engaged from the second magnetic attraction member, and the telescopic limiting structure is in an extended state under the elastic force of the first elastic supporting structure.

[0033] On the other hand, the first clamping groove includes an arc-shaped guide surface and a first limiting plane, the first limiting plane extends along the radial direction of the motor rotor or the motor stator, one end of the arc-shaped guide surface is connected to the first limiting plane, and the other end of the arc-shaped guide surface extends to the inner side surface of the motor rotor or the outer side surface of the motor stator;

[0034] The first stopping structure is provided with an arcuate sliding surface for cooperating with the arcuate guiding surface and a second limiting plane cooperating with the first limiting plane.

[0035] On the other hand, the one-way limiting device is movably arranged along the axial direction of the motor stator; the one-way limiting device comprises a first gear ring and a second gear ring, and the first gear ring and the second gear ring are both sleeved on the outer periphery of the motor stator;

[0036] The outer side surface of the first gear ring is provided with a second stop structure and a second elastic support structure, and the inner side surface of the motor rotor is provided with a second clamping groove for cooperating with the second stop structure; the second stop structure is rotatably arranged on the first gear ring; one end of the second elastic support structure is connected to the second stop structure, and the other end of the second elastic support structure is connected to the first gear ring; when the one-way limiting device is located at the first position, the second gear ring corresponds to the second clamping groove; when the one-way limiting device is located at the second position, the second stop structure cooperates with the second clamping groove;

[0037] The first gear ring is fixedly connected to the second gear ring; the anti-reversal cooling fan also includes a second adjustment device for driving the one-way limit device to switch between the first position and the second position, the second adjustment device includes a third electromagnet, a third magnetic attraction member for being attracted to the third electromagnet, and a third elastic member, one of the third electromagnet and the third magnetic attraction member is arranged on the one-way limit device, and the other of the third electromagnet and the third magnetic attraction member is arranged on the motor stator; one end of the third elastic member is connected to the one-way limit device, and the other end of the third elastic member is connected to the motor stator;

[0038] The anti-reversal cooling fan also includes a steering detection component and an alarm device. The steering detection component is used to obtain second steering information of the fan blades. When the steering detection component detects that the fan blades rotate in the opposite direction, the alarm device sends out a warning message.

[0039] A server, characterized in that it comprises a server body, a heat dissipation module and a power supply module, wherein the heat dissipation module and the power supply module both comprise the anti-reversal heat dissipation fan described in any one of the above items.

[0040] It can be seen from the above technical solution that the anti-reverse cooling fan provided by the present invention includes a motor stator, a motor rotor, fan blades and a one-way limit device. The motor rotor is rotatably sleeved on the outer periphery of the motor stator around the axial direction of the motor; the fan blades are arranged on the outer peripheral side of the motor rotor; the one-way limit device is arranged between the motor rotor and the motor stator, and the one-way limit device can be switched to a first position or a second position; when the one-way limit device is in the first position, the motor rotor can rotate relative to the motor stator in the forward direction or the reverse direction; when the one-way limit device is in the second position, the motor rotor can rotate relative to the motor stator in the forward direction and is locked in the reverse direction.

[0041] In actual use, when the anti-reversal cooling fan is used normally, the one-way limit device can be controlled to be in the first position, and the motor rotor can rotate in the forward or reverse direction relative to the motor stator, and the specific direction of rotation can be determined according to the actual situation; when the anti-reversal cooling fan is inserted into the server system, the one-way limit device is first adjusted to the second position, the motor rotor can rotate in the forward direction relative to the motor stator and is locked in the reverse direction, which can prevent the fan blades from reversing, and then the motor rotor is controlled to drive the fan blades to rotate in the forward direction until the speed of the fan blades is greater than the preset speed. At this time, the one-way limit device is adjusted to the first position, and the motor rotor is controlled to drive the fan blades to continue to rotate in the forward direction. The preset speed mentioned here refers to the minimum speed of the anti-reversal cooling fan that is not affected by the ambient airflow. When the speed of the anti-reversal cooling fan is less than the preset speed, if the one-way limit device is in the first position, the anti-reversal cooling fan will reverse or the speed will decrease due to the influence of the ambient airflow; when the speed of the anti-reversal cooling fan is greater than the preset speed, if the one-way limit device is in the first position, the anti-reversal cooling fan can maintain normal forward rotation and will not be reversed or the speed will decrease due to the influence of the ambient airflow.

[0042] The beneficial effects of the present invention are:

[0043] 1. In the present invention, by providing a one-way limit device, the motor rotor can be rotated in the forward direction relative to the motor stator and locked in the reverse direction, thereby preventing the motor rotor from reversing relative to the motor stator, and further preventing the fan blades from reversing, which can effectively protect the anti-reversal cooling fan, so that the anti-reversal cooling fan can be started normally when the surrounding airflow direction is opposite to the forward rotation airflow direction;

[0044] 2. In the present invention, by switching the position of the one-way limit device, the normal rotation or one-way rotation of the motor rotor relative to the motor stator can be adjusted, which can adapt to different needs and expand the use range of the anti-reverse cooling fan.

[0045] In addition, the present invention also relates to a server comprising the above-mentioned anti-reversal heat dissipation fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A schematic structural diagram of a one-way limit device in an anti-reverse cooling fan provided by an embodiment of the present invention being in a second position.

[0048] Figure 2 A schematic structural diagram of a one-way limit device in an anti-reverse cooling fan provided by an embodiment of the present invention being in a first position.

[0049] Figure 3 A schematic side view of an anti-reverse heat dissipation fan provided in an embodiment of the present invention.

[0050] Figure 4 It is a structural schematic diagram of the motor rotor and fan blades.

[0051] Figure 5 Schematic diagram of the installation position of the first stop structure.

[0052] Figure 6 It is a structural schematic diagram of a one-way limit device.

[0053] Figure 7 Schematic diagram of the control logic for preventing the cooling fan from reversing.

[0054] Figures 1 to 7 In the drawings, the reference numerals are as follows:

[0055] 1- Motor stator;

[0056] 11-rotation axis;

[0057] 2-motor rotor;

[0058] 3- Fan blades;

[0059] 4-One-way limit device;

[0060] 41-first slot; 42-first stop structure; 43-first elastic support structure; 44-first adjustment device; 441-limiting ring; 442-limiting block;

[0061] 5-Fan frame;

[0062] 6- Controller;

[0063] 61-first control unit; 62-second control unit;

[0064] 7- first information acquisition device;

[0065] 8- Second information acquisition device. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] The core of the present invention is to provide an anti-reverse cooling fan, which can limit the motor rotor to rotate only in the forward direction relative to the motor stator through a one-way limit device, thereby preventing the cooling fan from reversing when inserted into the system.

[0068] In addition, another core of the present invention is to provide a server including the above-mentioned anti-reversal cooling fan.

[0069] The anti-reverse cooling fan provided in this specific embodiment includes a motor stator 1, a motor rotor 2, fan blades 3 and a one-way limit device 4. The motor rotor 2 is rotatably sleeved on the outer periphery of the motor stator 1 around the axial direction of the motor; the fan blades 3 are arranged on the outer peripheral side of the motor rotor 2; the one-way limit device 4 is arranged between the motor rotor 2 and the motor stator 1, and the one-way limit device 4 can be switched to a first position or a second position; when the one-way limit device 4 is in the first position, the motor rotor 2 can rotate relative to the motor stator 1 in the forward direction or the reverse direction; when the one-way limit device 4 is in the second position, the motor rotor 2 can rotate relative to the motor stator 1 in the forward direction and be locked in the reverse direction.

[0070] It should be noted that the anti-reversal cooling fan may further include a fan frame 5, which is covered on the outside of the fan blades 3 and is provided with an air inlet and an air outlet. During actual use, the setting of the fan frame 5 can protect the internal fan blades 3, while preventing damage to surrounding components during the rotation of the fan blades 3, thereby improving safety.

[0071] During actual use, when the anti-reverse cooling fan is used normally, the one-way limit device 4 can be controlled to be located in the first position, and the motor rotor 2 can rotate in the forward or reverse direction relative to the motor stator 1, and the specific rotation direction can be determined according to actual conditions.

[0072] When the anti-reverse cooling fan is pulled out, the one-way limit device 4 is controlled to be adjusted to the second position. Due to the effect of inertia, the fan blades 3 continue to rotate in the forward direction until they stop rotating. After the fan blades 3 stop rotating, since the one-way limit device 4 is in the second position, the fan blades 3 can be prevented from rotating in the reverse direction.

[0073] When the anti-reversal cooling fan is inserted into the server system, the one-way limit device 4 is first adjusted to the second position, the motor rotor 2 can rotate relative to the motor stator 1 in the forward direction and locked in the reverse direction, so as to prevent the fan blades 3 from reversing, and then the motor rotor 2 is controlled to drive the fan blades 3 to rotate in the forward direction until the speed of the fan blades 3 is greater than the preset speed, at which time the one-way limit device 4 is adjusted to the first position, and the motor rotor 2 is controlled to drive the fan blades 3 to continue to rotate in the forward direction. The preset speed mentioned in the present application refers to the minimum speed of the anti-reversal cooling fan that is not affected by the ambient airflow. When the speed of the anti-reversal cooling fan is less than the preset speed, if the one-way limit device 4 is in the first position, the anti-reversal cooling fan will reverse or reduce its speed due to the influence of the ambient airflow; when the speed of the anti-reversal cooling fan is greater than the preset speed, if the one-way limit device 4 is in the first position, the anti-reversal cooling fan can maintain normal forward rotation and will not reverse or reduce its speed due to the influence of the ambient airflow.

[0074] When the anti-reverse cooling fan needs to be paused for a period of time, the motor rotor 2 is first controlled to stop rotating; the fan blades 3 will continue to rotate forward due to inertia. When the forward rotation speed of the fan blades 3 is less than the preset speed, the one-way limit device 4 is controlled to switch to the second position until the fan blades 3 stop rotating. When the anti-reverse cooling fan needs to be started again, the fan blades 3 are controlled to rotate forward until the forward rotation speed of the fan blades 3 is greater than the preset speed, the one-way limit device 4 is controlled to switch to the first position, and the fan blades 3 are controlled to continue to rotate forward.

[0075] In the present specific embodiment, by providing a one-way limit device 4, the motor rotor 2 can be rotated in the forward direction and locked in the reverse direction relative to the motor stator 1, thereby preventing the motor rotor 2 from reversing relative to the motor stator 1, and further preventing the fan blades 3 from reversing, which can effectively protect the anti-reversal cooling fan and enable the anti-reversal cooling fan to start normally when the ambient airflow direction is opposite to the forward rotation airflow direction; in the present specific embodiment, by switching the position of the one-way limit device 4, the motor rotor 2 can be adjusted to rotate normally or unidirectionally relative to the motor stator 1, which can adapt to different needs and expand the scope of use of the anti-reversal cooling fan.

[0076] On the basis of the above embodiments, the one-way limit device 4 can include a first slot 41, a first stopping structure 42, a first elastic support structure 43 and a first adjustment device 44, wherein the first slot 41 is arranged in one of the motor rotor 2 or the motor stator 1; the first stopping structure 42 is movably arranged in the other of the motor rotor 2 or the motor stator 1 between the first position and the second position; one end of the first elastic support structure 43 is connected to the first stopping structure 42, and the other end is connected to the first adjustment device 44; the first adjustment device 44 is arranged in the other of the motor rotor 2 or the motor stator 1, and the first adjustment device 44 is used to adjust the telescopic state of the first elastic support structure 43 so that the first stopping structure 42 switches to the first position or the second position.

[0077] During actual use, when it is necessary to adjust the first stop structure 42 to the second position, the first elastic support structure 43 can be put into a compressed state through the first adjusting device 44, and the first elastic support structure 43 pushes the first stop structure 42 to move in a direction close to the first slot 41. Under the elastic force of the first elastic support structure 43, the first stop structure 42 cooperates with the first slot 41 to limit the rotation of the motor rotor 2 relative to the motor stator 1, so that the motor rotor 2 can only rotate in the positive direction relative to the motor stator 1; when it is necessary to adjust the first stop structure 42 to the first position, the first elastic support structure 43 is put into a stretched state through the first adjusting device 44, and the first elastic support structure 43 pulls the first stop structure 42 to move in a direction away from the first slot 41; under the elastic force of the first elastic support structure 43, the first stop structure 42 is released from the first slot 41, and the motor rotor 2 can rotate in the positive or reverse direction relative to the motor stator 1.

[0078] It should be noted that the first adjustment device 44 in this specific embodiment can adjust the telescopic state of the first elastic support structure 43 by rotating to different positions, or the first adjustment device 44 can adjust the telescopic state of the first elastic support structure 43 by telescoping to different positions, or the first adjustment device 44 can adjust the telescopic state of the first elastic support structure 43 by other methods, which is determined according to actual conditions.

[0079] In this specific embodiment, by adjusting the different positions of the first stop structure 42, the first stop structure 42 and the first slot 41 are engaged or released, thereby enabling the motor rotor 2 to achieve unidirectional rotation relative to the motor stator 1 or release the unidirectional rotation restriction. The cooperation between the first stop structure 42 and the first slot 41 achieves unidirectional rotation through a mechanical structure, which can effectively improve the reliability of the unidirectional rotation of the motor rotor 2 relative to the motor stator 1. In addition, the provision of the first elastic support structure 43 can achieve the reset of the first stop structure 42, and the control process is simple and convenient.

[0080] In a specific embodiment, in combination Figure 1 , Figure 2 , Figure 6 As shown, the first adjustment device 44 can include a limit ring 441 and a limit block 442 arranged on the limit ring 441, and the limit ring 441 can be rotatably arranged on the other of the motor rotor 2 or the motor stator 1 between the first angle position and the second angle position; the first stop structure 42 is rotatably arranged on the limit ring 441; when the limit ring 441 is rotated to the first angle position, the first elastic support structure 43 is in a stretched state, and the first stop structure 42 is in the first position; when the limit ring 441 is rotated to the second angle position, the first elastic support structure 43 is in a compressed state, the first stop structure 42 is in the second position, and the first stop structure 42 is in contact with the limit block 442 to limit the first stop structure 42 from rotating toward the side close to the limit block 442.

[0081] like Figure 5 As shown, the first stopping structure 42 is rotatably disposed on the motor stator 1 via the rotating shaft 11 .

[0082] In actual use, when the control limit ring 441 is rotated to the first position, Figure 2 As shown, the first elastic support structure 43 is in a stretched state. Under the pull of the first elastic support structure 43, the first stop structure 42 deflects to a position close to the motor stator 1, and the first stop structure 42 and the first slot 41 are released from the engagement. At this time, the motor rotor 2 can rotate both forward and reverse relative to the motor stator 1. The forward direction is as shown in FIG. Figure 1 , Figure 2 The direction indicated by the arrow; the reverse direction is as follows Figure 1 , Figure 2 When the control limit ring 441 rotates to the second position, as shown in FIG. Figure 1 As shown, the first elastic support structure 43 is in a compressed state or a natural state. Under the push of the elastic force of the first elastic support structure 43, the first stop structure 42 is deflected to a position close to the motor rotor 2, and the first stop structure 42 is engaged with the first slot 41, and at this time the first stop structure 42 is in contact with the limit block 442, which can avoid excessive deflection of the first stop structure 42; at this time, the motor rotor 2 can only rotate forward relative to the motor stator 1. When the motor rotor 2 rotates reversely relative to the motor stator 1 at this time, the first stop structure 42 is engaged with the first slot 41, and the limit block 442 limits the first stop structure 42 from continuing to deflect, which can effectively limit the reverse rotation of the motor rotor 2 relative to the motor stator 1.

[0083] In this specific embodiment, by setting the limit ring 441 and the limit block 442, the position of the first stop structure 42 can be adjusted, and the adjustment process is convenient and easy to operate; in addition, the limit block 442 in this specific embodiment can effectively limit the swing angle of the first stop structure 42. When the first stop structure 42 is in the second position, it can effectively limit the reverse rotation of the motor rotor 2 relative to the motor stator 1, thereby improving the reliability of the unidirectional rotation of the motor rotor 2 relative to the motor stator 1.

[0084] On the basis of the above embodiment, the limit ring 441 is sleeved on the outer periphery of the motor stator 1; the first adjustment device 44 also includes an angle position adjustment component for controlling the rotation of the limit ring 441, and the angle position adjustment component includes a first elastic member, a first electromagnet and a first magnetic member. Among them, one end of the first elastic member is connected to the limit ring 441, and the other end is connected to the motor stator 1; one of the limit ring 441 and the motor stator 1 is provided with a first electromagnet; the other of the limit ring 441 and the motor stator 1 is provided with a first magnetic member for engaging with the first electromagnet; when the first electromagnet is powered on, the first electromagnet is engaged with the first magnetic member, and the limit ring 441 rotates to the first angle position; when the first electromagnet is powered off, the first electromagnet is released from the first magnetic member, and the limit ring 441 rotates to the second angle position under the elastic force of the first elastic member.

[0085] It should be noted that the first magnetic attraction member in this specific embodiment can also be set as an electromagnet. By controlling the difference in the direction of the current passing through the first electromagnet and the electromagnet in the first magnetic attraction member, an attractive force or a repulsive force can be generated between the two, thereby causing the limit ring 441 to rotate to the first angle position or the second angle position.

[0086] In this specific embodiment, by providing the first electromagnet and the first magnetic attraction member, during actual use, the first electromagnet and the first magnetic attraction member can be attracted or released by controlling the on and off of the first electromagnet; the control process is convenient and is conducive to automatic control.

[0087] In a specific embodiment, the anti-reversal cooling fan can also include a first information acquisition device 7, a second information acquisition device 8 and a controller 6, wherein the first information acquisition device 7 is used to obtain the speed information and the first steering information of the motor rotor 2; the second information acquisition device 8 is used to obtain the position information of the limit ring 441; the controller 6 is used to adjust the position of the limit ring 441 according to the speed information, the first steering information and the position information.

[0088] like Figure 7 As shown, the controller 6 further includes a first control unit 61 and a second control unit 62 , wherein the first control unit 61 is used to control the rotation of the motor rotor 2 ; and the second control unit 62 is used to control the rotation of the limit ring 441 .

[0089] During actual use, the speed information and the first steering information of the motor rotor 2 can be obtained through the first information acquisition device 7, and the speed information and the first steering information can be sent to the controller 6; the position information of the limit ring 441 can be obtained through the second information acquisition device 8; the controller 6 controls the rotation of the motor rotor 2 according to the speed information, the first steering information and the position information of the limit ring 441.

[0090] The specific usage process is as follows:

[0091] In the first step, the first information acquisition device 7 acquires the speed information and the first direction information of the motor rotor 2 ; the second information acquisition device 8 acquires the position information of the limit ring 441 .

[0092] In the second step, the controller 6 determines whether the limit ring 441 is at the second angle position according to the position information, and if so, controls the anti-reverse cooling fan to be plugged in.

[0093] In the third step, the first control unit 61 controls the motor rotor 2 to drive the fan blades 3 to rotate in the positive direction.

[0094] In the fourth step, the first information acquisition device acquires the rotation speed information of the motor rotor 2 again.

[0095] In the fifth step, the controller 6 determines whether the rotation speed of the fan blade 3 is greater than the preset rotation speed according to the rotation speed information. If so, it proceeds to the next step; if not, it returns to the third step.

[0096] In the sixth step, the second control unit 62 controls the limiting ring 441 to rotate to the first angle position.

[0097] The anti-reversal cooling fan in this specific embodiment can realize automatic control of the rotation process of the anti-reversal cooling fan by setting the first information acquisition device 7, the second information acquisition device 8 and the controller 6, so as to facilitate timely acquisition of the speed and direction information of the anti-reversal cooling fan, and facilitate timely taking of measures. In addition, the rotation position of the limit ring 441 can be controlled, making the use process of the anti-reversal cooling fan more convenient.

[0098] In a specific embodiment, the first adjustment device 44 includes a telescopic limit structure, one end of the telescopic limit structure is connected to the first stop structure 42, and the other end is connected to the other of the motor rotor 2 or the motor stator 1; the first stop structure 42 is rotatably arranged on the other of the motor rotor 2 or the motor stator 1; when the telescopic limit structure is in an extended state, the first stop structure 42 rotates to the second position; when the telescopic limit structure is in a retracted state, the first stop structure 42 rotates to the first position.

[0099] In actual use, when the position of the first stop structure 42 needs to be adjusted to the first position, the telescopic limit structure can be adjusted to the retracted state. During the retraction process, the telescopic limit structure drives the first stop structure 42 to rotate to the first position, so that the first stop structure 42 and the first slot 41 are released; when the position of the first stop structure 42 needs to be adjusted to the second position, the telescopic limit structure can be adjusted to the extended state. During the extension process, the telescopic limit structure drives the first stop structure 42 to rotate to the second position, so that the first stop structure 42 and the first slot 41 are engaged. When the first stop structure 42 is located at the second position, the first elastic support structure 43 plays a major supporting role for the first stop structure 42. During the reverse rotation of the motor rotor 2 relative to the motor stator 1, the first stop structure 42 and the first slot 41 repeat between engagement and release, and the telescopic limit structure will repeatedly extend and retract in a small stroke to achieve unidirectional limited rotation of the motor rotor 2 relative to the motor stator 1.

[0100] In this specific embodiment, the first adjustment device 44 includes a telescopic limit structure, which adjusts the position of the first stop structure 42 by adjusting the telescopic state, so as to realize the unidirectional limit rotation of the motor rotor 2 relative to the motor stator 1; in addition, compared with the limit ring 441, the telescopic limit structure in this specific embodiment does not need to rotate around the motor stator 1, and the operation process is more convenient.

[0101] On the basis of the above embodiment, the other end of the telescopic limit structure can be connected to the motor stator 1; the first adjustment device 44 also includes a second electromagnet for controlling the extension of the telescopic limit structure, and the second electromagnet is arranged on one of the telescopic limit structure and the motor stator 1, and the other of the telescopic limit structure and the motor stator 1 is provided with a second magnetic attraction member for engaging with the second electromagnet; when the second electromagnet is energized, the second electromagnet is attracted to the second magnetic attraction member, and the telescopic limit structure is in a retracted state; when the second electromagnet is de-energized, the second electromagnet is de-engaged with the second magnetic attraction member, and the telescopic limit structure is in an extended state under the elastic force of the first elastic support structure 43.

[0102] In this specific embodiment, the telescopic state of the telescopic limit structure can be adjusted by controlling the on and off of the second electromagnet, and the adjustment process is convenient, which is conducive to realizing the automation of the working process of the anti-reversal heat dissipation fan. In addition, in this specific embodiment, the first elastic support structure 43 can elastically support the telescopic limit structure, so that when the first stop structure 42 is in the second position, during the rotation of the motor rotor 2 relative to the motor stator 1, the first stop structure 42 can enter the first card slot 41 under the elastic force of the first elastic support structure 43 to achieve the card connection with the first card slot 41. At the same time, when the motor rotor 2 rotates forward relative to the motor stator 1, the first stop structure 42 can compress the first elastic support structure 43 to achieve the temporary release of the card connection between the first stop structure 42 and the first card slot 41.

[0103] In a specific embodiment, the first slot 41 can include an arcuate guide surface and a first limiting plane, the first limiting plane extends radially along the motor rotor 2 or the motor stator 1, one end of the arcuate guide surface is connected to the first limiting plane, and the other end of the arcuate guide surface extends to the inner side surface of the motor rotor 2 or the outer side surface of the motor stator 1; the first stopping structure 42 is provided with an arcuate sliding surface for cooperating with the arcuate guide surface and a second limiting plane for cooperating with the first limiting plane.

[0104] Combination Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, in actual use, when the first stopping structure 42 is located at the second position and the motor rotor 2 rotates in the opposite direction relative to the motor stator 1, the first limiting plane is in contact with the second limiting plane, and at this time, the motor rotor 2 cannot rotate relative to the motor stator 1; when the motor rotor 2 rotates forward relative to the motor stator 1, the arcuate guide surface of the first slot 41 slides along the arcuate sliding surface until the first stopping structure 42 escapes from the first slot 41, and when rotating to the next first slot 41, under the action of the elastic force of the first elastic supporting structure 43, the first stopping structure 42 enters the first slot 41, and the motor rotor 2 continues to rotate in the opposite direction relative to the motor stator 1, and the arcuate guide surface of the first slot 41 slides along the arcuate sliding surface until the first stopping structure 42 escapes from the first slot 41, and this is repeated to achieve the rotation of the motor rotor 2 in the opposite direction relative to the motor stator 1.

[0105] In this specific embodiment, by making the first slot 41 include an arcuate guide surface and a first limiting plane, the unidirectional rotation of the motor rotor 2 relative to the motor stator 1 can be limited; in addition, the arcuate guide surface cooperates with the arcuate sliding surface to avoid jamming during the positive rotation of the motor rotor 2 relative to the motor stator 1, thereby ensuring the smoothness of the positive rotation of the motor rotor 2 relative to the motor stator 1.

[0106] In a specific embodiment, the one-way limit device 4 can be movably arranged along the axial direction of the motor stator 1; the one-way limit device 4 includes a first gear ring and a second gear ring, and the first gear ring and the second gear ring are both sleeved on the outer periphery of the motor stator 1.

[0107] The outer side surface of the first ring gear is provided with a second stopping structure and a second elastic supporting structure, and the inner side surface of the motor rotor 2 is provided with a second clamping groove for cooperating with the second stopping structure; the second stopping structure is rotatably arranged on the first ring gear; one end of the second elastic supporting structure is connected to the second stopping structure, and the other end of the second elastic supporting structure is connected to the first ring gear; when the one-way limiting device 4 is in the first position, the second ring gear corresponds to the second clamping groove; when the one-way limiting device 4 is in the second position, the second stopping structure can cooperate with the second clamping groove.

[0108] No other structure is arranged on the outer periphery of the second gear ring to ensure that when the second gear ring corresponds to the position where the second slot is arranged in the motor rotor 2 , the second gear ring will not affect the forward or reverse rotation of the motor rotor 2 relative to the motor stator 1 .

[0109] The first gear ring is fixedly connected to the second gear ring; the anti-reversal cooling fan also includes a second adjustment device for driving the one-way limit device 4 to switch between the first position and the second position, the second adjustment device includes a third electromagnet, a third magnetic attraction member for engaging with the third electromagnet, and a third elastic member, one of the third electromagnet and the third magnetic attraction member is arranged on the one-way limit device 4, and the other of the third electromagnet and the third magnetic attraction member is arranged on the motor stator 1; one end of the third elastic member is connected to the one-way limit device 4, and the other end of the third elastic member is connected to the motor stator 1.

[0110] During actual use, when it is necessary to make the motor rotor 2 rotate unidirectionally relative to the motor stator 1, the third electromagnet can be controlled to be energized, and the third electromagnet and the third magnetic attraction member are attracted. During the process of the third electromagnet and the third magnetic attraction member being attracted, the one-way limit device 4 moves to the second position. At this time, the second stop structure on the outer side surface of the first gear ring corresponds to the second slot; when it is necessary to make the motor rotor 2 rotate in both forward and reverse directions relative to the motor stator 1, the third electromagnet is controlled to be de-energized, and the third electromagnet and the third magnetic attraction member are released. During the process of the third electromagnet and the third magnetic attraction member being released, the one-way limit device 4 moves to the first position under the elastic force of the second elastic support structure. At this time, the second gear ring corresponds to the second slot.

[0111] Of course, the installation position of the second elastic support structure or the third electromagnet can also be adjusted so that when the third electromagnet is powered off, the one-way limit device 4 moves to the second position, and when the third electromagnet is powered on, the one-way limit device 4 moves to the second position under the elastic force of the second elastic support structure; the specific method is determined based on actual conditions and will not be elaborated here.

[0112] In this specific embodiment, the axial position of the first gear ring and the second gear ring is adjusted by controlling the axial movement of the one-way limit device 4 along the motor stator 1. When the first gear ring corresponds to the second slot, the second stop structure will not contact the motor rotor 2 during the rotation of the motor rotor 2 relative to the motor stator 1, which can effectively reduce the friction during the rotation of the motor rotor 2; and the motor rotor 2 can rotate in both the forward and reverse directions relative to the motor stator 1; when the second gear ring corresponds to the second slot, the second stop structure can be engaged with the second slot, so that the motor rotor 2 can only rotate in the forward direction relative to the motor stator 1. In addition, the control process of the one-way limit device 4 moving along the axial direction of the motor stator 1 is relatively simple and easy to carry out.

[0113] On the basis of the above embodiment, the anti-reversal cooling fan may further include a steering detection component and an alarm device. The steering detection component is used to obtain the second steering information of the fan blades 3. When the steering detection component detects that the fan blades 3 rotate in the opposite direction, the alarm device issues a warning message.

[0114] In view of the current situation that some anti-reversal cooling fans can only rotate in the forward direction, in this specific embodiment, by providing a steering detection component and an alarm device, the steering information of the fan blade 3 can be detected in time, and the alarm device sends a warning message when the fan blade 3 rotates in the reverse direction, which is conducive to the staff to take timely measures.

[0115] In a specific embodiment, the fan blade 3 is a split structure, and the fan blade 3 includes a first blade unit fixed to the motor rotor 2, a second blade unit that is flippable and arranged on the first blade unit, and a limiting structure for limiting the flipping of the second blade unit along a second direction; the limiting structure includes a first limiting surface arranged on the first blade unit and a second limiting surface arranged on the second blade unit.

[0116] In the initial state, the second blade unit extends along the extension direction of the first blade unit, and the first blade unit and the second blade unit are combined into a fan blade 3; when the fan blade 3 rotates in the forward direction, the first limiting surface contacts the second limiting surface, so that the first blade unit and the second blade unit maintain the initial state; when the fan blade 3 rotates in the reverse direction, the second blade unit flips relative to the first blade unit, and the first limiting surface separates from the second limiting surface; the length of the fan blade 3 is reduced. Specifically, the second blade unit can be flipped to the back of the first blade unit, or the second blade unit can be flipped to a position where the angle between the extension direction and the extension direction of the first blade unit is less than or equal to 90°.

[0117] Furthermore, an elastic reset structure can be provided, one end of the elastic reset structure being connected to the first blade unit, and the other end being connected to the second blade unit; during actual use, when the fan blade 3 stops rotating, under the action of the elastic force of the elastic reset structure, the second blade unit flips to a position where the first limit surface contacts the second limit surface.

[0118] In the present specific embodiment, the fan blades 3 are arranged as a split structure. During actual use, even if the motor rotor 2 rotates in the opposite direction relative to the motor stator 1, the second blade unit flips to a position where the angle between the extension direction and the extension direction of the first blade unit is less than or equal to 90°, which can effectively reduce the force area of ​​the fan blades 3, thereby reducing the rotation speed of the fan blades 3 and reducing the adverse effect of the reverse rotation of the motor rotor 2 relative to the motor stator 1; in case of accidental damage to the one-way limit device 4, the loss can be minimized as much as possible, thereby effectively protecting the anti-reversal cooling fan and related equipment.

[0119] In addition to the above-mentioned anti-reversal cooling fan, the present invention further provides a server including a server body, a cooling module and a power module, wherein the cooling module and the power module both include any of the above-mentioned anti-reversal cooling fans.

[0120] In actual use, when the anti-reverse cooling fan is used normally, the one-way limit device 4 can be controlled to be located at the first position, and the motor rotor 2 can be controlled to rotate in the positive direction relative to the motor stator 1, and the speed can be adjusted according to actual conditions.

[0121] When the anti-reverse cooling fan is pulled out, the one-way limit device 4 is controlled to be adjusted to the second position. Due to the effect of inertia, the fan blades 3 continue to rotate in the forward direction until they stop rotating. After the fan blades 3 stop rotating, since the one-way limit device 4 is in the second position, the fan blades 3 can be prevented from rotating in the reverse direction.

[0122] When the anti-reversal cooling fan is inserted into the server system, the one-way limit device 4 is first adjusted to the second position to prevent the fan blades 3 from reversing, and then the motor rotor 2 is controlled to drive the fan blades 3 to rotate in the forward direction until the speed of the fan blades 3 is greater than the preset speed. At this time, the one-way limit device 4 is adjusted to the first position, and the motor rotor 2 is controlled to drive the fan blades 3 to continue to rotate in the forward direction.

[0123] When software upgrade is required in the server, the anti-reverse cooling fan needs to be paused for a period of time. First, the motor rotor 2 is controlled to stop rotating. The fan blades 3 will continue to rotate forward due to inertia. When the forward rotation speed of the fan blades 3 is less than the preset speed, the one-way limit device 4 is controlled to switch to the second position until the fan blades 3 stop rotating. When the anti-reverse cooling fan needs to be started again, it is first necessary to determine whether the one-way limit device 4 is in the second position. Only when the one-way limit device 4 is in the second position can the fan blades 3 be controlled to rotate forward until the forward rotation speed of the fan blades 3 is greater than the preset speed. The one-way limit device 4 is controlled to switch to the first position, and the fan blades 3 are controlled to continue to rotate forward.

[0124] In the server in this specific embodiment, the above-mentioned anti-reversal cooling fan is provided in both the power module and the heat dissipation module, which is convenient for thermal maintenance; in addition, it can prevent the anti-reversal cooling fan and the power module from being unable to start normally due to fan reversal caused by negative wind pressure in the system after the anti-reversal cooling fan and the power module are inserted into the system; in addition, the present invention can solve the fan reversal problem that may be caused by fan software upgrade and solve the problem of online fan upgrade.

[0125] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0126] The above is a detailed introduction to the anti-reversal cooling fan and server provided by the present invention. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. An anti-reverse cooling fan, characterized in that: include: Motor stator (1); A motor rotor (2) is rotatably sleeved on the outer periphery of the motor stator (1) around the axial direction of the motor; Fan blades (3) are arranged on the outer peripheral side of the motor rotor (2); A one-way limiting device (4) is arranged between the motor rotor (2) and the motor stator (1), and the one-way limiting device (4) can be switched to a first position or a second position; When the one-way limiting device (4) is located at the first position, the motor rotor (2) can rotate in a forward direction or a reverse direction relative to the motor stator (1); when the one-way limiting device (4) is located at the second position, the motor rotor (2) can rotate in a forward direction relative to the motor stator (1) and is locked in a reverse direction.

2. The anti-reversal cooling fan according to claim 1, characterized in that: The one-way limiting device (4) comprises: A first slot (41) is provided on one of the motor rotor (2) or the motor stator (1); A first stop structure (42) movably disposed on the other of the motor rotor (2) or the motor stator (1) between the first position and the second position; A first elastic support structure (43), one end of which is connected to the first stop structure (42) and the other end of which is connected to the first adjustment device (44); The first adjustment device (44) is arranged on the other of the motor rotor (2) or the motor stator (1), and the first adjustment device (44) is used to adjust the telescopic state of the first elastic support structure (43) so that the first stop structure (42) switches to the first position or the second position.

3. The anti-reversal cooling fan according to claim 2, characterized in that: The first adjustment device (44) comprises a limiting ring (441) and a limiting block (442) arranged on the limiting ring (441); the limiting ring (441) is rotatably arranged on the other of the motor rotor (2) or the motor stator (1) between a first angle position and a second angle position; the first stop structure (42) is rotatably arranged on the limiting ring (441); When the limiting ring (441) rotates to the first angular position, the first elastic support structure (43) is in a stretched state, and the first stop structure (42) is in the first position; When the limiting ring (441) rotates to the second angular position, the first elastic support structure (43) is in a compressed state, the first stop structure (42) is in the second position, and the first stop structure (42) is in contact with the limiting block (442) to limit the first stop structure (42) from rotating toward the side close to the limiting block (442).

4. The anti-reversal cooling fan according to claim 3, characterized in that: The limiting ring (441) is sleeved on the outer circumference of the motor stator (1); the first adjustment device (44) further comprises an angle position adjustment component for controlling the rotation of the limiting ring (441), the angle position adjustment component comprising: A first elastic member, one end of which is connected to the limiting ring (441) and the other end of which is connected to the motor stator (1); a first electromagnet, wherein one of the limiting ring (441) and the motor stator (1) is provided with the first electromagnet, and the other of the limiting ring (441) and the motor stator (1) is provided with a first magnetic attraction member for being attracted to the first electromagnet; When the first electromagnet is powered on, the first electromagnet is attracted to the first magnetic attraction member, and the limit ring (441) rotates to the first angular position; when the first electromagnet is powered off, the first electromagnet is de-attracted from the first magnetic attraction member, and the limit ring (441) rotates to the second angular position under the elastic force of the first elastic member.

5. The anti-reversal cooling fan according to claim 4, characterized in that: Also includes: A first information acquisition device (7) for acquiring rotation speed information and first direction information of the motor rotor (2); A second information acquisition device (8) for acquiring position information of the limit ring (441); A controller (6) is used to adjust the position of the limit ring (441) according to the rotation speed information, the first steering information and the position information.

6. The anti-reversal cooling fan according to claim 2, characterized in that: The first adjustment device (44) comprises a telescopic limiting structure, one end of the telescopic limiting structure is connected to the first stop structure (42), and the other end is connected to the other of the motor rotor (2) or the motor stator (1); the first stop structure (42) is rotatably arranged on the other of the motor rotor (2) or the motor stator (1); When the telescopic limiting structure is in an extended state, the first stop structure (42) rotates to the second position; When the telescopic limiting structure is in a retracted state, the first stopping structure (42) rotates to the first position.

7. The anti-reversal cooling fan according to claim 6, characterized in that: The other end of the telescopic limit structure is connected to the motor stator (1); the first adjustment device (44) further comprises a second electromagnet for controlling the extension of the telescopic limit structure, the second electromagnet being arranged on one of the telescopic limit structure and the motor stator (1), and the other of the telescopic limit structure and the motor stator (1) being provided with a second magnetic attraction member for attracting the second electromagnet; When the second electromagnet is powered on, the second electromagnet is attracted to the second magnetic attraction member, and the telescopic limiting structure is in a retracted state; when the second electromagnet is powered off, the second electromagnet is disengaged from the second magnetic attraction member, and the telescopic limiting structure is in an extended state under the elastic force of the first elastic support structure (43).

8. The anti-reversal cooling fan according to claim 2, characterized in that: The first clamping groove (41) comprises an arc-shaped guide surface and a first limiting plane, the first limiting plane extending along the radial direction of the motor rotor (2) or the motor stator (1), one end of the arc-shaped guide surface is connected to the first limiting plane, and the other end of the arc-shaped guide surface extends to the inner side surface of the motor rotor (2) or the outer side surface of the motor stator (1); The first stop structure (42) is provided with an arcuate sliding surface for cooperating with the arcuate guide surface and a second limiting plane cooperating with the first limiting plane.

9. The anti-reversal cooling fan according to any one of claims 1 to 7, characterized in that: The one-way limiting device (4) is movably arranged along the axial direction of the motor stator (1); the one-way limiting device (4) comprises a first gear ring and a second gear ring, and the first gear ring and the second gear ring are both sleeved on the outer circumference of the motor stator (1); The outer side surface of the first gear ring is provided with a second stop structure and a second elastic support structure, and the inner side surface of the motor rotor (2) is provided with a second clamping groove for cooperating with the second stop structure; the second stop structure is rotatably arranged on the first gear ring; one end of the second elastic support structure is connected to the second stop structure, and the other end of the second elastic support structure is connected to the first gear ring; when the one-way limiting device (4) is located at the first position, the second gear ring corresponds to the second clamping groove; when the one-way limiting device (4) is located at the second position, the second stop structure cooperates with the second clamping groove; The first gear ring is fixedly connected to the second gear ring; the anti-reversal cooling fan further comprises a second adjustment device for driving the one-way limiting device (4) to switch between the first position and the second position, the second adjustment device comprising a third electromagnet, a third magnetic attraction member for engaging with the third electromagnet, and a third elastic member, one of the third electromagnet and the third magnetic attraction member is arranged on the one-way limiting device (4), and the other of the third electromagnet and the third magnetic attraction member is arranged on the motor stator (1); one end of the third elastic member is connected to the one-way limiting device (4), and the other end of the third elastic member is connected to the motor stator (1); The anti-reversal cooling fan further comprises a steering detection component and an alarm device, wherein the steering detection component is used to obtain second steering information of the fan blades (3), and when the steering detection component detects that the fan blades (3) are rotating in the reverse direction, the alarm device issues a warning message.

10. A server, characterized in that: It comprises a server body, a heat dissipation module and a power supply module, wherein the heat dissipation module and the power supply module both comprise the anti-reversal heat dissipation fan according to any one of claims 1 to 9.

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