Server cooling fan and server

Abstract

The invention relates to the technical field of servers, and discloses a server cooling fan and a server. The server cooling fan comprises a rotating source, a cooling fan and a cooling device, the rotating part is connected with the power output end of the rotating source; the fan blades are rotatably connected to the rotating part; and the adjusting mechanism is connected with the fan blades and is in communication connection with the rotating source, the inclination angle of the fan blades can be switched from the first attack angle to the second attack angle when the rotating source is powered on, and the air blowing direction of the fan blades at the first attack angle is opposite to the air blowing direction of the fan blades at the second attack angle. After the server cooling fan is powered on, forward rotation of the fan position can be guaranteed without overcoming the reverse torque, and the defects that after the cooling fan is powered on, the forward torque force cannot overcome the force of the reverse torque, the forward rotation speed of the fan is low, and even the fan continuously rotates reversely can be overcome. And heat in the electronic device cannot be effectively discharged.

Description

Technical Field

[0001] This invention relates to the field of server technology, specifically to a server cooling fan and a server. Background Technology

[0002] As server performance improves, the heat output of the electronic components inside the server also increases. To prevent these components from overheating and failing, cooling fans are typically used to dissipate heat from them.

[0003] However, the blades of a server cooling fan may rotate in the opposite direction before power is applied, driven by the external airflow. This results in the forward torque force of the fan blades being unable to overcome the reverse torque force after the server cooling fan is powered on, causing the fan to rotate slowly in the forward direction or even continuously in the reverse direction, thus failing to effectively dissipate the heat inside the electronic components. Summary of the Invention

[0004] In view of this, the present invention provides a server cooling fan and a server to solve the problem in the prior art that, after being powered on, the forward torque force of the server cooling fan cannot overcome the reverse torque force, resulting in a slow forward rotation speed of the fan, or even continuous reverse rotation, which cannot effectively dissipate the heat inside the electronic components.

[0005] In a first aspect, the present invention provides a server cooling fan, comprising:

[0006] Rotation source;

[0007] The rotating part is connected to the power output end of the rotation source;

[0008] The fan blades are rotatably connected to the rotating part;

[0009] The adjustment mechanism is connected to the fan blades and communicates with the rotation source. When the rotation source is powered on, it can switch the tilt angle of the fan blades from the first angle of attack to the second angle of attack. The airflow direction when the fan blades are tilted at the first angle of attack is opposite to the airflow direction when the fan blades are tilted at the second angle of attack.

[0010] Beneficial effects: Before power-on, the server cooling fan of this embodiment of the invention has its blades tilted at a first angle of attack. When the airflow inside the server blows over the blades at this angle of attack, the blades rotate in a first direction. After the server cooling fan is powered on, the adjustment mechanism can switch the tilt angle of the blades from the first angle of attack to a second angle of attack. The rotation source can drive the blades to continue rotating in the first direction, effectively dissipating the heat from the electronic components inside the server.

[0011] Because when the fan blades rotate in the first direction at the second angle of attack, the airflow direction is opposite to that when the fan blades are at the first angle of attack, the rotation direction of the fan blades is the same as the rotation direction caused by the airflow inside the server after the tilt angle of the fan blades is switched to the second angle of attack. This allows the server cooling fan to maintain a forward rotation without having to overcome the reverse torque after power-on. This overcomes the problem in related technologies where the forward torque force cannot overcome the reverse torque force after power-on, resulting in a slow forward rotation speed or even continuous reverse rotation, which fails to effectively dissipate heat from electronic components.

[0012] In addition, when the server cooling fan is not powered on, the external airflow drives the fan blades to rotate, giving the server cooling fan a certain initial speed during startup. This helps to reduce the startup voltage of the server cooling fan, ensuring that the server cooling fan can continue to operate even when the voltage fluctuates or is unstable, thus enhancing the adaptability and reliability of the server cooling fan.

[0013] In one alternative implementation, the adjustment mechanism includes:

[0014] A retaining ring is fixedly sleeved on the outer circumference of the rotating part;

[0015] The movable ring is rotatably sleeved on the outer periphery of the rotating part and is spaced apart from the fixed ring along the axial direction of the rotating part. There are multiple fan blades, which are spaced apart along the circumferential direction of the rotating part. The end of the fan blade facing the rotating part has a first hinge part and a second hinge part. The first hinge part is hinged to the outer periphery of the fixed ring, and the second hinge part is hinged to the outer periphery of the movable ring.

[0016] The drive mechanism is connected to the rotating part, and its power output end is connected to the movable ring, which can drive the movable ring to move circumferentially along the rotating part.

[0017] Beneficial effects: The drive mechanism can drive the movable ring to rotate circumferentially along the rotating part, thereby changing the relative position of the first hinge part and the second hinge part of the fan blade to adjust the angle of attack of the fan blade.

[0018] In one alternative embodiment, a notch is formed on the movable ring, and the drive mechanism includes:

[0019] A magnetic component is located within the notch and connected to the movable ring.

[0020] An electromagnet is connected to the rotating part and is set in the notch. The coil of the electromagnet is connected to the power supply circuit of the rotating source. When the rotating source is energized, the coil can be energized, the electromagnet attracts the magnetic component, and switches the tilt angle of the fan blade from the first angle of attack to the second angle of attack.

[0021] A fixed surface is formed on the rotating part and located within the notch; the fixed surface is located on the side of the electromagnet away from the magnetic component.

[0022] The elastic reset component, which is connected between the second end of the movable ring and the fixed surface, can switch the tilt angle of the fan blade from the second angle of attack to the first angle of attack when the rotation source is de-energized.

[0023] Beneficial effects:

[0024] When the server cooling fan of the present invention is powered by the power supply, the electromagnet can be energized and generate magnetism, thereby attracting the magnetic component. The fixed rod stretches the elastic reset component and makes a movement close to the electromagnet, so that the fan blades rotate around the first hinge part. The tilt angle of the fan blades switches from the first angle of attack to the second angle of attack, so that the server cooling fan can maintain the forward rotation of the fan position without overcoming the reverse torque after being powered on.

[0025] When the power supply is turned off, the electromagnet loses its magnetism, the elastic reset component loses its external force, and pulls the movable ring to rotate in the opposite direction through its own elastic restoring force. The fan blades rotate in the opposite direction around the first hinge, and the tilt angle of the fan blades switches from the second angle of attack to the first angle of attack. This ensures that when the server cooling fan is powered off, the rotation direction of the fan blades driven by the airflow inside the server is consistent with the rotation direction of the server cooling fan when it is working.

[0026] Furthermore, the adjustment mechanism in this embodiment is connected to the power supply circuit of the rotation source, thereby ensuring that the electromagnet is energized at the same time as the rotation source is started, so as to immediately switch the tilt angle of the fan blade from the first angle of attack to the second angle of attack, avoiding the need for the rotation source to overcome the reverse speed due to the untimely switching of the angle of attack; and can immediately switch the tilt angle of the fan blade from the second angle of attack to the first angle of attack when the rotation source is turned off, so that the rotation direction generated by the fan blade under the drive of the airflow inside the server is consistent with the rotation direction of the server cooling fan in the working state.

[0027] In one alternative implementation, the server cooling fan further includes an elastic element connected between the magnetic element and the end of the movable ring.

[0028] Beneficial effects:

[0029] When the power supply starts supplying power, the electromagnet is energized and generates magnetism, thereby attracting the magnetic component. This causes the magnetic component to stretch the elastic component and attract it to the electromagnet. Then, the elastic component can pull the rotating rod through its own elastic restoring force, thereby driving the rotating rod to rotate and switching the tilt angle of the fan blade from the first angle of attack to the second angle of attack.

[0030] In one alternative embodiment, the rotation source includes a stator and a rotor, with the rotating part connected to the rotor.

[0031] Beneficial effects:

[0032] The stator is the stationary part that generates a magnetic field; the rotor is the rotating part that generates induced electromotive force and current in the magnetic field, thereby producing electromagnetic torque, so that it rotates relative to the stator and carries the rotating part and fan blades to rotate.

[0033] In one optional embodiment, a server cooling fan is characterized by further comprising a fan frame, a stator including a fixed shaft, a positive electrode connecting ring, and a negative electrode connecting ring, wherein the fixed shaft is fixedly disposed in the middle of the fan frame, and a drive circuit board is disposed inside the fixed shaft; the positive electrode connecting ring is sleeved outside the fixed shaft and connected to the positive electrode of the drive circuit board; the negative electrode connecting ring is sleeved outside the fixed shaft and spaced apart from the positive electrode connecting ring along the axial direction of the fixed shaft, and connected to the negative electrode of the drive circuit board;

[0034] The rotor includes a rotating sleeve, which is rotatably fitted onto the outside of the rotating sleeve. A first conductive ring and a second conductive ring are provided on the inner circumference of the rotating sleeve. The first conductive ring is slidably connected to the positive terminal connecting ring, and the second conductive ring is slidably connected to the negative terminal connecting ring. The rotating part is fitted onto the rotating sleeve, and the two ends of the electromagnet's coil are respectively connected to the first conductive ring and the second conductive ring.

[0035] Beneficial effects:

[0036] With this configuration, one end of the electromagnet's coil can be electrically connected to the positive terminal of the drive circuit board via the first conductive ring and the positive terminal connecting ring in sequence, and the other end of the electromagnet's coil can be electrically connected to the negative terminal of the drive circuit board via the second conductive ring and the negative terminal connecting ring in sequence. This ensures that the electromagnet's coil can be powered by the server's cooling fan drive circuit, and that the circuit between the coil and the drive circuit board will not interfere with the rotation between the rotor and the stator.

[0037] In one alternative embodiment, the stator further includes a bearing housing disposed at the center of a fixed shaft, and the rotor includes a rotating shaft connected to the center of a rotating sleeve, the rotating shaft being inserted into the bearing housing via a bearing.

[0038] Beneficial effects:

[0039] The shaft is inserted into a bearing housing via bearings. This serves to support the shaft and reduce friction and wear during its movement.

[0040] In one alternative embodiment, the stator further includes stator windings surrounding the bearing housing, and the rotor further includes permanent magnets fixedly mounted on a rotating sleeve.

[0041] In one alternative embodiment, the server cooling fan is characterized by further including a housing surrounding the rotating part and the adjustment mechanism. The housing has a clearance opening and an arc-shaped track. The arc-shaped track is an arc with the clearance opening as the origin and the distance between the first hinge and the second hinge as the radius. The first hinge passes through the clearance opening, and the second hinge passes through the arc-shaped track.

[0042] Beneficial effects:

[0043] The housing serves to shield the rotating and adjusting parts, enhancing the aesthetics of the server cooling fan and preventing interference between the adjusting mechanism and external structures during operation. Furthermore, the curved track not only prevents interference between the second hinge and the housing during rotation but also constrains the movement trajectory of the second hinge, ensuring that the fan blade tilt angle accurately switches between the first and second angles of attack.

[0044] Secondly, the present invention also provides a server, comprising:

[0045] Power supply;

[0046] The first aspect of the present invention provides a server cooling fan for dissipating heat from a power supply.

[0047] Beneficial effects:

[0048] The server of the second aspect of the present invention includes or uses the server cooling fan of the first aspect of the present invention, and thus has the beneficial effect that the server cooling fan can ensure the fan position rotates in the forward direction without overcoming the reverse torque after being powered on. This can overcome the problem in the related art that after being powered on, the forward torque force of the server cooling fan cannot overcome the reverse torque force, resulting in the fan rotating slowly in the forward direction or even continuously reversing, and failing to effectively dissipate the heat inside the electronic device.

[0049] In addition, when the server cooling fan is not powered on, the external airflow causes the fan blades to rotate, giving the fan a certain initial speed during startup. This helps to reduce the startup voltage of the server cooling fan, ensuring that the server cooling fan can continue to operate even when the voltage fluctuates or is unstable, thus enhancing the adaptability and reliability of the server cooling fan.

[0050] In one alternative implementation, the server cooling fan is connected to the output of the power supply and can be powered on and blow air toward the power supply after it is powered on.

[0051] Beneficial effects:

[0052] With this configuration, when the power supply starts supplying power, the corresponding server cooling fan can be powered synchronously, so that the electromagnet is powered synchronously through the power supply circuit of the rotation source. This ensures that when the power supply starts supplying power, the tilt angle of the fan blades is immediately switched from the first angle of attack to the second angle of attack, and the server cooling fan can immediately rotate and cool the power supply.

[0053] When the power supply stops supplying power, the corresponding server cooling fan can be powered off simultaneously, so that the electromagnet is powered off synchronously. Moreover, at the same time as the rotation source is turned off, the tilt angle of the fan blades can be switched from the second angle of attack to the first angle of attack immediately, so that the rotation direction of the fan blades driven by the airflow inside the server is consistent with the rotation direction of the server cooling fan in the working state. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the server cooling fan blades tilted at the first angle of attack, according to an embodiment of the present invention.

[0056] Figure 2 The rotating part and fan blades of the server cooling fan are shown in the figure. The tilt angle of the fan blades of the server cooling fan is the first angle of attack.

[0057] Figure 3 This is a schematic diagram of the server cooling fan blades tilted at the second angle of attack, according to an embodiment of the present invention.

[0058] Figure 4 The rotating part and fan blades of the server cooling fan in this embodiment of the invention are shown. The tilt angle of the fan blades of the server cooling fan in the figure is the second angle of attack.

[0059] Figure 5 This is a schematic diagram of the adjustment mechanism of the server cooling fan according to an embodiment of the present invention. In order to facilitate the illustration of the connection relationship between the fixed ring and the movable ring and the fan blade, the fixed ring and the movable ring are shown as strips. The tilt angle of the fan blade in the figure is the first angle of attack.

[0060] Figure 6 This is a schematic diagram of the adjustment mechanism of a server cooling fan according to an embodiment of the present invention. The tilt angle of the fan blades in the figure is the first angle of attack.

[0061] Figure 7 This is a schematic diagram of the adjustment mechanism of the server cooling fan according to an embodiment of the present invention. In order to facilitate the illustration of the connection relationship between the fixed ring and the movable ring and the fan blade, the fixed ring and the movable ring are shown as strips. The tilt angle of the fan blade in the figure is the second angle of attack.

[0062] Figure 8 This is a schematic diagram of the adjustment mechanism of a server cooling fan according to an embodiment of the present invention. The tilt angle of the fan blades in the figure is the second angle of attack.

[0063] Figure 9 This is a cross-sectional view of the adjustment mechanism of the server cooling fan according to an embodiment of the present invention;

[0064] Figure 10 This is a schematic diagram showing the connection relationship between the electromagnet of the server cooling fan and the first conductive ring, the second conductive ring, the positive terminal connection ring, and the negative terminal connection ring in an embodiment of the present invention.

[0065] Explanation of reference numerals in the attached figures:

[0066] 1. Rotating source; 101. Stator; 1011. Fixed shaft; 1012. Positive connecting ring; 1013. Negative connecting ring; 102. Rotor; 1021. Rotating sleeve; 1022. First conductive ring; 1023. Second conductive ring; 2. Rotating part; 3. Fan blade; 301. First hinge part; 302. Second hinge part; 4. Adjusting mechanism; 401. Fixed ring; 402. Movable ring; 403. Electromagnet; 404. Fixed surface; 405. Elastic reset element; 406. Elastic element; 407. Magnetic element. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0068] With the rise of e-commerce, social media, and big data analytics, the demand for massive data transmission and storage on the Internet has made the construction and development of large-scale data centers an immediate solution. The key hardware components of a data center are servers and power distribution facilities.

[0069] Power plants transmit standard AC and high-voltage DC power to large data centers, which then need to be converted into low-voltage DC by power supplies to provide the accurate operating voltage for the servers. If a power supply fails, it will shut down, requiring redundant power supplies to maintain the voltage.

[0070] Since data centers primarily use servers as their hardware architecture, but require power supplies to provide power input, a single server typically requires two to four power supplies to maintain system operation. The overall power consumption can range from 1000W to 6000W.

[0071] In addition, servers are usually equipped with at least two sets of server cooling fans. One set of server cooling fans is the system fan, which is used to dissipate heat from high-power components inside the server (such as central processing unit, hard disk or graphics processor). The system fan is larger, the fan speed is faster, and the airflow generated is larger.

[0072] Another set of server cooling fans is used to cool the power supply. These server cooling fans are smaller, run at a slower speed, and are more susceptible to the airflow from the system fans.

[0073] During operation, the system fan creates an airflow channel inside the server. The power supply is installed inside the server and is located in a closed airflow channel. Since some power supplies are redundant devices, the server cooling fans of these power supplies are normally de-energized. The fan blades 3 of the server cooling fan are easily reversed due to the airflow inside the server, and may reach a speed of nearly 1000 to 3000 rpm. The rotation direction of the server cooling fan caused by the airflow inside the server is opposite to the normal operating direction. This causes the rotation source 1 of the server cooling fan of the power supply to drive the fan blades 3 to rotate in the forward direction when the power supply starts to input voltage.

[0074] At this point, if the reverse torque of fan blade 3 exceeds the forward torque applied by rotation source 1 to fan blade 3, the server cooling fan will be unable to return to forward rotation, or even if it returns to forward rotation, the speed will be affected by the airflow inside the server and will not be able to increase, resulting in the server cooling fan speed being too slow and unable to fully exchange heat with the power supply inside the server. The server cooling fan will be unable to effectively expel the heat source of the internal components of the power supply, eventually triggering the over-temperature protection of the internal components of the power supply, which will affect the operation of the server. In severe cases, it may even damage the power supply and affect the safety of the server circuit.

[0075] The following is combined Figures 1 to 10 The following describes embodiments of the present invention.

[0076] According to an embodiment of the present invention, a server cooling fan is provided, including a rotation source 1, a rotation part 2, fan blades 3, and an adjustment mechanism 4. The rotation part 2 is connected to the power output terminal of the rotation source 1. The fan blades 3 are rotatably connected to the rotation part 2. The adjustment mechanism 4 is connected to the fan blades 3 and communicatively connected to the rotation source 1, and is capable of switching the tilt angle of the fan blades 3 from a first angle of attack to a second angle of attack when the rotation source 1 is powered on. When the rotation direction of the fan blades 3 is the same, the airflow direction when the fan blades 3 are tilted at the first angle of attack is opposite to the airflow direction when the fan blades 3 are tilted at the second angle of attack.

[0077] Before power-on, the server cooling fan of this embodiment has its blades 3 tilted at a first angle of attack. When the airflow inside the server blows over the blades 3 at this angle of attack, the blades 3 rotate in a first direction. After the server cooling fan is powered on, the adjustment mechanism 4 can switch the tilt angle of the blades 3 from the first angle of attack to a second angle of attack. The rotation source 1 can drive the blades 3 to continue rotating in the first direction of attack, and smoothly dissipate the heat from the electronic components inside the server. Figure 2 The direction indicated by the middle arrow is the direction of movement of fan blade 3 as the tilt angle of fan blade 3 changes from the first angle of attack to the second angle of attack.

[0078] Because when the fan blade 3 rotates in the first direction at the second angle of attack, the airflow direction of the fan is opposite to that when the fan blade 3 is at the first angle of attack, the rotation direction of the fan blade 3 is the same as the rotation direction generated by the airflow inside the server after the tilt angle of the fan blade 3 is switched to the second angle of attack. This allows the server cooling fan to maintain a forward rotation without having to overcome the reverse torque after power-on. This overcomes the problem in related technologies where the forward torque force cannot overcome the reverse torque force after power-on, resulting in a slow forward rotation speed of the fan or even continuous reverse rotation, which cannot effectively dissipate the heat inside the electronic components.

[0079] In addition, when the server cooling fan is not powered on, the external airflow drives the fan blades 3 to rotate, so that the server cooling fan has a certain initial speed during the startup process. This helps to reduce the startup voltage of the server cooling fan and ensures that the server cooling fan can still operate when the voltage fluctuates or is unstable, thus enhancing the adaptability and reliability of the server cooling fan.

[0080] The server cooling fan in this embodiment is preferably used to cool the server's power supply, and more preferably to cool redundant power supplies. As an alternative implementation, the server cooling fan can also be used as a system fan to cool high-power devices (such as central processing units, hard disks, or graphics processors) inside the server.

[0081] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0082] In one embodiment, the adjusting mechanism 4 includes a fixed ring 401, a movable ring 402, and a driving mechanism. The fixed ring 401 is fixedly sleeved on the outer periphery of the rotating part 2. The movable ring 402 is rotatably sleeved on the outer periphery of the rotating part 2 and is spaced apart from the fixed ring 401 along the axial direction of the rotating part 2. Multiple fan blades 3 are arranged spaced apart along the circumferential direction of the rotating part 2. A first hinge portion 301 and a second hinge portion 302 are formed at the end of the fan blade 3 facing the rotating part 2. The first hinge portion 301 is hinged to the outer periphery of the fixed ring 401, and the second hinge portion 302 is hinged to the outer periphery of the movable ring 402. The driving mechanism is connected to the rotating part 2, and its power output end is connected to the movable ring 402, enabling it to drive the movable ring 402 to move circumferentially along the rotating part 2.

[0083] When the rotation source 1 is energized, the drive mechanism can drive the movable ring 402 to rotate circumferentially along the rotating part 2, thereby changing the relative position of the first hinge part 301 and the second hinge part 302 of the fan blade 3, adjusting the tilt angle of the fan blade 3 from the first angle of attack to the second angle of attack. When the rotation source 1 is de-energized, the drive mechanism can drive the movable ring 402 to rotate in the opposite direction, thereby switching the tilt angle of the fan blade 3 from the second angle of attack to the first angle of attack. The drive mechanism is preferably, but not limited to, a hydraulic cylinder, a pneumatic cylinder, an electric cylinder, a threaded screw, or a combination of a motor and a rack and pinion. To compensate for the tilt angle generated by the movable ring 402 during movement, the power output end of the drive mechanism can be connected to the movable ring 402 via a connecting rod.

[0084] like Figures 5 to 9 As shown, a notch is formed on the movable ring 402. The driving mechanism includes a magnetic component 407, an electromagnet 403, a fixed surface 404, and an elastic reset component 405. The magnetic component 407 is disposed within the notch and connected to the movable ring 402. The electromagnet 403 is connected to the rotating part 2 and disposed within the notch. The coil of the electromagnet 403 is connected to the power supply circuit of the rotating source 1. When the rotating source 1 is energized, the coil is energized, the electromagnet 403 attracts the magnetic component 407, and switches the tilt angle of the fan blade 3 from the first angle of attack to the second angle of attack. The fixed surface 404 is formed on the rotating part 2 and located within the notch, on the side of the electromagnet 403 away from the magnetic component 407. The elastic reset component 405 is connected between the second end of the movable ring 402 and the fixed surface 404, and can switch the tilt angle of the fan blade 3 from the second angle of attack to the first angle of attack when the rotating source 1 is de-energized.

[0085] The server cooling fan of this invention, when powered by the power supply, such as... Figure 5 and Figure 6 As shown, the electromagnet 403 can be energized and generate magnetism, thereby attracting the magnetic component 407. The fixed rod stretches the elastic reset component 405 and moves close to the electromagnet 403, so that the fan blade 3 rotates around the first hinge 301. The tilt angle of the fan blade 3 switches from the first angle of attack to the second angle of attack, so that the server cooling fan can maintain the positive rotation of the fan position without overcoming the reverse torque after being powered on.

[0086] When the power supply is turned off, electromagnet 403 loses its magnetism, such as Figure 7 and Figure 8 As shown, the elastic reset member 405 loses the external force and pulls the movable ring 402 to rotate in the opposite direction through its own elastic restoring force. The fan blade 3 rotates in the opposite direction around the first hinge part 301. The tilt angle of the fan blade 3 switches from the second angle of attack to the first angle of attack, thereby ensuring that the rotation direction generated by the fan blade 3 under the drive of the airflow inside the server is consistent with the rotation direction of the server cooling fan when it is powered off.

[0087] Furthermore, the adjustment mechanism 4 in this embodiment is connected to the power supply circuit of the rotation source 1, thereby ensuring that the electromagnet 403 can not only be energized when the rotation source 1 is started, thereby immediately switching the tilt angle of the fan blade 3 from the first angle of attack to the second angle of attack, avoiding the need for the rotation source 1 to overcome the reverse rotation speed due to untimely angle of attack switching; but also can immediately switch the tilt angle of the fan blade 3 from the second angle of attack to the first angle of attack when the rotation source 1 is turned off, so that the rotation direction generated by the fan blade 3 under the drive of the airflow inside the server is consistent with the rotation direction of the server cooling fan in the working state.

[0088] The magnetic component 407 is preferably, but not limited to, a magnet or lodestone, or a metal such as iron, cobalt, or nickel that can be attracted in a magnetic field. The elastic reset component 405 is preferably, but not limited to, a spring. The rotating part 2 preferably has a protruding abutment portion, one side of which serves as a fixing surface 404 for connecting with the elastic reset component 405, and the other side of which is used to connect with the electromagnet 403 for fixing the electromagnet 403.

[0089] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium.

[0090] As a variable implementation, the adjustment mechanism 4 includes a fixed ring 401, a movable ring 402, an electromagnet 403, and a first permanent magnet. The fixed ring 401 is fixedly sleeved on the outer periphery of the rotating part 2. The movable ring 402 is rotatably sleeved on the outer periphery of the rotating part 2 and is spaced apart from the fixed ring 401 along the axial direction of the rotating part. A magnetic element 407 is connected to the first end of the movable ring 402. A first hinge portion 301 and a second hinge portion 302 are formed at the end of the fan blade 3 facing the rotating part 2. The first hinge portion 301 is hinged to the outer periphery of the fixed ring 401, and the second hinge portion 302 is hinged to the outer periphery of the movable ring 402. The electromagnet 403 is disposed inside the rotating part 2, and the coil of the electromagnet 403 is connected to the power supply circuit of the rotating source 1. When the rotating source 1 is energized, the coil is energized. The first permanent magnet is disposed on the side of the electromagnet 403 away from the magnetic element 407.

[0091] The magnetic component 407 is a second permanent magnet, and the second permanent magnet can repel the first permanent magnet. When the electromagnet 403 is energized, the electromagnet 403 can attract the second permanent magnet and switch the tilt angle of the fan blade 3 to the first angle of attack.

[0092] When the power supply is turned off, the electromagnet 403 loses its magnetism, and the second permanent magnet can repel the first permanent magnet, thereby driving the movable ring 402 to rotate in the opposite direction. The fan blade 3 rotates in the opposite direction around the first hinge 301, and the tilt angle of the fan blade 3 switches from the second angle of attack to the first angle of attack. This ensures that when the server cooling fan is powered off, the rotation direction of the fan blade 3 driven by the airflow inside the server is consistent with the rotation direction of the server cooling fan when it is working.

[0093] With this configuration, the movable ring 402 can be reset without the need for the adjustment mechanism 4 and the use of a spring, thus avoiding the aging of the elastic reset component 405 which could cause the angle switching of the adjustment mechanism 4 to be incomplete.

[0094] In one embodiment, the server cooling fan further includes an elastic element 406 connected between the magnetic element 407 and the end of the movable ring 402.

[0095] When the power supply starts supplying power, the electromagnet 403 is energized and generates magnetism, thereby attracting the magnetic component 407, so that the magnetic component 407 stretches the elastic component 406 and attracts it to the electromagnet 403. Then, the elastic component 406 can pull the rotating rod through its own elastic restoring force, so as to drive the rotating rod to rotate and switch the tilt angle of the fan blade 3 from the first angle of attack to the second angle of attack.

[0096] Among them, the elastic element 406 is preferably, but not limited to, a spring.

[0097] It should be noted that, in this embodiment, the specific number of fan blades 3 on the server cooling fan is not limited, and can be configured according to the heat dissipation requirements of the power supply module. Preferably, as follows: Figure 2 As shown, the server cooling fan comprises seven fan blades 3, which are evenly arranged along the outer periphery of the rotating part 2. Preferably, the fan blades 3 are inclined and curved on the rotating part 2 to cut the air and force it to flow forward or backward. As an alternative implementation, the number of fan blades 3 can also be three, five, or eight, etc.

[0098] In one embodiment, the rotation source 1 includes a stator 101 and a rotor 102, with the rotating part 2 connected to the rotor 102. The stator 101 is a stationary part that can generate a magnetic field; the rotor 102 is a rotating part that can generate induced electromotive force and current in the magnetic field, thereby generating electromagnetic torque to rotate relative to the stator 101 and carry the rotating part 2 and the fan blades 3 to rotate.

[0099] In one embodiment, such as Figure 10 As shown, the server cooling fan also includes a fan frame, and the stator 101 includes a fixed shaft 1011, a positive connecting ring 1012, and a negative connecting ring 1013. The fixed shaft 1011 is fixedly disposed in the middle of the fan frame, and a drive circuit board is disposed inside the fixed shaft 1011. The positive connecting ring 1012 is sleeved on the outside of the fixed shaft 1011 and connected to the positive terminal of the drive circuit board. The negative connecting ring 1013 is sleeved on the outside of the fixed shaft 1011 and is spaced apart from the positive connecting ring 1012 along the axial direction of the fixed shaft 1011, and is connected to the negative terminal of the drive circuit board.

[0100] The rotor 102 includes a rotating sleeve 1021. The rotating sleeve 1021 is rotatably sleeved on the outside of the rotating sleeve 1021. A first conductive ring 1022 and a second conductive ring 1023 are provided on the inner circumference of the rotating sleeve 1021. The first conductive ring 1022 is slidably connected to the positive electrode connecting ring 1012, and the second conductive ring 1023 is slidably connected to the negative electrode connecting ring 1013. The rotating part 2 is sleeved on the rotating sleeve 1021. The two ends of the coil of the electromagnet 403 are respectively connected to the first conductive ring 1022 and the second conductive ring 1023.

[0101] With this configuration, one end of the coil of electromagnet 403 can be electrically connected to the positive terminal of the drive circuit board through the first conductive ring 1022 and the positive terminal connecting ring 1012 in sequence, and the other end of the coil of electromagnet 403 can be electrically connected to the negative terminal of the drive circuit board through the second conductive ring 1023 and the negative terminal connecting ring 1013 in sequence. This ensures that the coil of electromagnet 403 can be powered by the drive circuit of the server cooling fan, and that the circuit between the coil and the drive circuit board will not interfere with the rotation between the rotor 102 and the stator 101.

[0102] The driver circuit board is used to manage the power supply of the hardware modules in the server cooling fan, ensuring their stability and safety.

[0103] As a variable implementation, a first brush and a second brush are spaced apart on the inner circumference of the rotating sleeve 1021. The first brush can be slidably connected to the positive electrode connecting ring 1012, and the second brush can be slidably connected to the negative electrode connecting ring 1013. The two ends of the coil of the electromagnet 403 are respectively connected to the first brush and the second brush.

[0104] Preferably, the fan frame is connected to the fixed shaft 1011 via a connecting strip to fix the stator 101.

[0105] In one embodiment, the stator 101 further includes a bearing housing. The bearing housing is disposed at the center of the fixed shaft 1011, and the rotor 102 includes a rotating shaft connected to the center of the rotating sleeve 1021. The rotating shaft is inserted into the bearing housing via a bearing. This serves to support the rotating shaft and reduce friction and wear during its movement. The bearing is preferably, but not limited to, an oil-impregnated bearing, a hydraulic bearing, or a ball bearing.

[0106] In one embodiment, the stator 101 further includes a stator winding surrounding the bearing housing, and the rotor 102 further includes a permanent magnet fixedly mounted on the rotating sleeve 1021.

[0107] In one embodiment, the server cooling fan further includes a housing, which surrounds the rotating part and the adjustment mechanism 4. The housing has a clearance opening and an arc track. The arc track is an arc with the clearance opening as the origin and the distance between the first hinge part 301 and the second hinge part 302 as the radius. The first hinge part 301 passes through the clearance opening, and the second hinge part 302 passes through the arc track.

[0108] The housing can be used to shield the rotating part and the adjustment mechanism 4 to improve the aesthetics of the server cooling fan, while also preventing the adjustment mechanism 4 from interfering with the external structure during movement. In addition, the arc-shaped track can not only prevent the second hinge part 302 from interfering with the housing during rotation, but also constrain the movement trajectory of the second hinge part 302 to ensure that the tilt angle of the fan blade 3 can accurately switch between the first angle of attack and the second angle of attack.

[0109] Preferably, in this embodiment, when the second hinge portion 302 is at the first end of the arc track, the tilt angle of the fan blade 3 is the first angle of attack, and when the second hinge portion 302 is at the second end of the arc track, the tilt angle of the fan blade 3 is the second angle of attack.

[0110] According to an embodiment of the present invention, in another aspect, a server is also provided, including a power supply and a server cooling fan provided in the first aspect of the present invention, the server cooling fan being used to dissipate heat from the power supply.

[0111] The server of the second aspect of the present invention includes or uses the server cooling fan of the first aspect of the present invention, and thus has the beneficial effect that the server cooling fan can ensure the fan position rotates in the forward direction without overcoming the reverse torque after being powered on. This can overcome the problem in the related art that after being powered on, the forward torque force of the server cooling fan cannot overcome the reverse torque force, resulting in the fan rotating slowly in the forward direction or even continuously reversing, and failing to effectively dissipate the heat inside the electronic device.

[0112] In addition, when the server cooling fan is not powered on, the external airflow drives the fan blades 3 to rotate, so that the fan has a certain initial speed during startup. This helps to reduce the startup voltage of the server cooling fan and ensures that the server cooling fan can continue to operate when the voltage fluctuates or is unstable, thus enhancing the adaptability and reliability of the server cooling fan.

[0113] In one embodiment, the server cooling fan is connected to the output of the power supply and can be powered on and blow air toward the power supply after the power supply is powered on.

[0114] With this configuration, when the power supply starts supplying power, the corresponding server cooling fan can be powered synchronously, so that the electromagnet 403 can be powered synchronously through the power supply circuit of the rotation source 1. This ensures that when the power supply starts supplying power, the tilt angle of the fan blade 3 is immediately switched from the first angle of attack to the second angle of attack, and the server cooling fan can immediately rotate and cool the power supply.

[0115] When the power supply stops supplying power, the corresponding server cooling fan can be powered off simultaneously, so that the electromagnet 403 is powered off synchronously. Moreover, when the rotation source 1 is turned off, the tilt angle of the fan blade 3 can be switched from the second angle of attack to the first angle of attack immediately, so that the rotation direction generated by the fan blade 3 under the drive of the airflow inside the server is consistent with the rotation direction of the server cooling fan in the working state.

[0116] In summary, the server cooling fan of the first aspect and the server of the second aspect of the present invention have the following advantages:

[0117] 1. The server cooling fan of the first aspect and the server of the second aspect of the present invention can fundamentally solve the problem that the fan blades 3 of the current power supply will reverse due to the high-speed fan airflow that performs heat exchange inside the server during the operation of the server.

[0118] 2. The server cooling fan of the present invention, before the power supply is powered on, is driven by the reverse airflow generated by the server cooling fan inside the server, and the direction of the fan blades 3 is consistent with the direction of the server cooling fan when it is powered on and when the power is off.

[0119] 3. Improved power supply stability reduces the maintenance burden on power supply personnel, eliminating the need to control the internal fan speed of the server to reduce airflow and prevent the power supply fan from reversing.

[0120] 4. The above advantages are features that traditional power supplies cannot achieve. Introducing mature technologies into power supplies to add additional functions also makes the maintenance and management of power supplies more convenient.

[0121] 5. In addition to adding value to the power supply, it can also improve the overall power supply stability of the data center and reduce the losses from system crashes. Besides protecting the normal operation of the server, it prevents the entire machine from crashing due to power supply issues or human negligence, thus eliminating the risk of unrecoverable critical and confidential data.

[0122] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A server cooling fan, characterized in that, include: Rotating source (1); Rotating part (2), which is connected to the power output end of the rotating source (1); The fan blade (3) is rotatably connected to the rotating part (2); The adjustment mechanism (4) is connected to the fan blade (3) and communicates with the rotation source (1). When the rotation source (1) is powered on, it can switch the tilt angle of the fan blade (3) from the first angle of attack to the second angle of attack. The air blowing direction when the fan blade (3) is at the first angle of attack is opposite to the air blowing direction when the fan blade (3) is at the second angle of attack.

2. The server cooling fan according to claim 1, characterized in that, The adjustment mechanism (4) includes: A fixing ring (401) is fixedly sleeved on the outer periphery of the rotating part (2); A movable ring (402) is rotatably sleeved on the outer periphery of the rotating part (2) and spaced apart from the fixed ring (401) along the axial direction of the rotating part (2). There are multiple fan blades (3) and they are spaced apart along the circumferential direction of the rotating part (2). The fan blades (3) have a first hinge part (301) and a second hinge part (302) at one end facing the rotating part (2). The first hinge part (301) is hinged to the outer periphery of the fixed ring (401), and the second hinge part (302) is hinged to the outer periphery of the movable ring (402). A drive mechanism is connected to the rotating part (2), and its power output end is connected to the movable ring (402), which can drive the movable ring (402) to move circumferentially along the rotating part (2).

3. The server cooling fan according to claim 2, characterized in that, A notch is formed on the movable ring (402), and the driving mechanism includes: A magnetic component (407) is disposed within the notch and connected to the movable ring (402); An electromagnet (403) is connected to the rotating part (2) and disposed in the notch. The coil of the electromagnet (403) is connected to the power supply circuit of the rotating source (1). When the rotating source (1) is energized, the coil is energized, the electromagnet (403) attracts the magnetic component (407), and switches the tilt angle of the fan blade (3) from the first angle of attack to the second angle of attack. A fixing surface (404) is formed on the rotating part (2) and located in the notch. The fixing surface (404) is located on the side of the electromagnet (403) away from the magnetic element (407). The elastic reset member (405) is connected between the second end of the movable ring (402) and the fixed surface (404), and can switch the tilt angle of the fan blade (3) from the second angle of attack to the first angle of attack when the rotation source (1) is de-energized.

4. The server cooling fan according to claim 3, characterized in that, It also includes an elastic element (406) connected between the magnetic element (407) and the end of the movable ring (402).

5. The server cooling fan according to claim 3 or 4, characterized in that, The rotation source (1) includes a stator (101) and a rotor (102), and the rotating part (2) is connected to the rotor (102).

6. The server cooling fan according to claim 5, characterized in that, It also includes a fan frame. The stator (101) includes a fixed shaft (1011), a positive electrode connecting ring (1012), and a negative electrode connecting ring (1013). The fixed shaft (1011) is fixedly disposed in the middle of the fan frame, and a drive circuit board is disposed inside the fixed shaft (1011). The positive electrode connecting ring (1012) is sleeved on the outside of the fixed shaft (1011) and connected to the positive electrode of the drive circuit board. The negative electrode connecting ring (1013) is sleeved on the outside of the fixed shaft (1011) and is spaced apart from the positive electrode connecting ring (1012) along the axial direction of the fixed shaft (1011). The negative electrode of the drive circuit board is connected to the negative electrode. The rotor (102) includes a rotating sleeve (1021), which is rotatably sleeved on the outside of the rotating sleeve (1021). The inner circumference of the rotating sleeve (1021) is provided with a first conductive ring (1022) and a second conductive ring (1023). The first conductive ring (1022) is slidably connected to the positive electrode connecting ring (1012), and the second conductive ring (1023) is slidably connected to the negative electrode connecting ring (1013). The rotating part (2) is sleeved on the rotating sleeve (1021), and the two ends of the coil of the electromagnet (403) are respectively connected to the first conductive ring (1022) and the second conductive ring (1023).

7. The server cooling fan according to claim 6, characterized in that, The stator (101) also includes a bearing housing, which is disposed in the middle of the fixed shaft (1011). The rotor (102) includes a rotating shaft, which is connected to the middle of the rotating sleeve (1021). The rotating shaft is inserted into the bearing housing through a bearing.

8. The server cooling fan according to claim 7, characterized in that, The stator (101) further includes a stator winding surrounding the bearing housing, and the rotor (102) further includes a permanent magnet, which is fixedly mounted on the rotating sleeve (1021).

9. The server cooling fan according to any one of claims 2 to 4, characterized in that, It also includes a housing, which is arranged around the rotating part (2) and the adjusting mechanism (4). The housing has a clearance opening and an arc track. The arc track is an arc with the clearance opening as the origin and the distance between the first hinge part (301) and the second hinge part (302) as the radius. The first hinge part (301) passes through the clearance opening and the second hinge part (302) passes through the arc track.

10. A server, characterized in that, include: Power supply; The server cooling fan according to any one of claims 1 to 9 is used to dissipate heat from the power supply.

11. The server according to claim 10, characterized in that, The server cooling fan is connected to the output terminal of the power supply and can be powered on and blow air towards the power supply after the power supply is powered on.

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