Power supply fan system and server

Abstract

The invention provides a power supply fan system and a server, and the system comprises a power supply unit which is provided with a power supply fan; the synchronous brake is movably contacted with the power supply fan; wherein the synchronous brake and the power supply unit share a circuit, or the synchronous brake and the power supply fan share a part of rotation path; when the power supply fan rotates forwards, the synchronous brake is separated from the power supply fan; and before the power supply fan rotates reversely or when the power supply fan starts to rotate reversely, the synchronous brake is clamped with the power supply fan. The synchronous brake utilizes a pure mechanical braking principle, so that the action of the synchronous brake is always consistent with the state of the power supply fan, and quick intervention can be realized before the power supply fan reverses or just reverses. When the PSU breaks down or the power supply fan stops rotating, the synchronous brake responds immediately, braking is carried out before the fan rotates reversely, transmission and processing of electronic signals are not needed, the response speed is higher, and preventive protection is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of server architecture, and in particular to a power supply fan system and a server. Background Art

[0002] With the diversification of system layouts, there are more and more designs where the system fan is placed in the same row or near the PSU (Power Supply Unit). Therefore, when the PSU input loses power, the power supply fan generally does not rotate by default to save energy, and the system fan speeds up. Because the wind force is too strong, negative wind pressure is formed at the air inlet of the PSU. When the wind pressure reaches a certain level, the rotor of the stopped power supply fan will be rotated by the system wind pressure, and the direction is opposite to the normal direction. The reversal of the power supply fan can easily cause PSU failure.

[0003] Regarding the challenges of power supply fan reliability, the anti-reversal technology provided today mainly relies on electronic protection strategies, which require sensors to obtain the rotation status of the power supply fan before taking corresponding actions. However, such measures require additional circuit startup protection after the PSU loses power and rely on external signals, which are complex and costly to design. In addition, its braking trigger mechanism is after the power supply fan reverses, lagging behind the power supply fan status, with a delayed response time. The power supply fan has already reversed to a certain extent, and the potential fault problem caused by the reversal of the power supply fan has not been fundamentally solved. Summary of the invention

[0004] The embodiments of the present application provide a power supply fan system and a server to solve the problem that the anti-reversal of the power supply fan of the PSU on the server is not synchronized, preventive protection cannot be achieved, and there is a potential fault.

[0005] One of the purposes of the present application is to provide a power supply fan system, comprising:

[0006] A power supply unit, equipped with a power supply fan;

[0007] a synchronous brake in active contact with the power supply fan;

[0008] Wherein, the synchronous brake shares a circuit with the power supply unit, or shares a part of the rotation path with the power supply fan;

[0009] When the power supply fan rotates forward, the synchronous brake is out of contact with the power supply fan;

[0010] Before the power supply fan rotates reversely or starts to rotate reversely, the synchronous brake is engaged with the power supply fan.

[0011] Optionally, the synchronous brake comprises a magnetic force generator and an electromagnetic mechanical arm connected to each other;

[0012] Wherein, the power supply unit and the magnetic force generator share a circuit, and the power supply fan and the power supply unit are powered off synchronously;

[0013] When the power supply unit supplies power normally, the power supply fan rotates forward, and the magnetic force generator is attracted to the electromagnetic mechanical arm, so that the electromagnetic mechanical arm is not in contact with the power supply fan;

[0014] When the power supply unit loses power, the power supply fan stops rotating, and the magnetic force generator is disconnected from the electromagnetic mechanical arm, so that the electromagnetic mechanical arm is engaged with the power supply fan.

[0015] Optionally, the synchronous brake further comprises an elastic member, and the magnetic force generator is connected to the electromagnetic mechanical arm via the elastic member;

[0016] Wherein, the elastic member is in a compressed state during normal power supply.

[0017] Optionally, at least a portion of the electromagnetic robotic arm is made of magnetic material.

[0018] Optionally, at least one magnetic block is provided on the electromagnetic mechanical arm.

[0019] Optionally, the magnetic force generator and the electromagnetic mechanical arm are both arranged on the periphery of the power supply fan, and the electromagnetic mechanical arm extends into or exits the power supply fan through a hole provided on a fan shell of the power supply fan.

[0020] Optionally, the power supply unit is used to be assembled to the rear end of the server, the air inlet of the power supply fan is located in the same row or near the system fan in the server, and the synchronous brake is adjacent to the power supply fan;

[0021] Wherein, the magnetic force generator includes a magnetic core and a coil, the coil is connected in series with the power supply circuit of the power supply unit, and the magnetic core is connected to the electromagnetic mechanical arm through a spring, so that:

[0022] The magnetic core generates magnetic attraction to the electromagnetic mechanical arm when the power supply unit supplies power, so that the electromagnetic mechanical arm is in a contracted state;

[0023] The magnetic core releases the electromagnetic mechanical arm when the power supply unit loses power, so that the electromagnetic mechanical arm extends into the power supply fan under the action of the spring;

[0024] Wherein, the electromagnetic mechanical arm is a guide rod, and the inner diameter of the electromagnetic mechanical arm is smaller than the aperture of the heat dissipation hole on the side of the fan shell of the power supply fan; so that:

[0025] When the electromagnetic mechanical arm is retracted, the electromagnetic mechanical arm extends out of the power supply fan through the heat dissipation hole, allowing the power supply fan to rotate forward without additional mechanical constraints;

[0026] When the electromagnetic mechanical arm is released, the electromagnetic mechanical arm is inserted between the blades of the power supply fan through the heat dissipation hole to prevent the power supply fan from reversing;

[0027] The power supply unit is provided with a metal shielding shell, and the magnetic force generator and the electromagnetic mechanical arm are accommodated in the metal shielding shell; and the metal shielding shell has a hole on one side close to the power supply fan, so as to allow the electromagnetic mechanical arm to move freely in the hole;

[0028] A fixing bracket is arranged in the metal shielding shell, the fixing bracket is used to support the electromagnetic mechanical arm, and the fixing bracket is made of non-magnetic material.

[0029] Optionally, the synchronous brake shares part of the rotation path with the power supply fan, and the synchronous brake includes a check bearing, which is used to allow the power supply fan to rotate freely in the forward direction and be locked when reversed; or, the synchronous brake includes a ratchet and pawl mechanism, the ratchet is arranged on the fan shaft of the power supply fan, the pawl is arranged on the fan housing, and the meshing direction of the ratchet and pawl is set to the reverse direction of the power supply fan.

[0030] Optionally, the power supply unit is provided with a power secondary control microcontroller, and the power secondary control microcontroller is used to detect the main output of the power supply unit, and the power supply unit is connected to the server via an output gold finger.

[0031] The second object of the present application is to provide a server, wherein the server is equipped with a power supply fan system as provided in one of the objects of the present application.

[0032] Compared with the prior art, this application has the following advantages:

[0033] An embodiment of the present application provides a power supply fan system, comprising: a power supply unit, which is equipped with a power supply fan; and a synchronous brake, which is in active contact with the power supply fan; wherein the synchronous brake shares a circuit with the power supply unit, or shares a partial rotation path with the power supply fan; when the power supply fan rotates forward, the synchronous brake disengages from the power supply fan; and before the power supply fan reverses or starts to reverse, the synchronous brake engages with the power supply fan.

[0034] By adopting the technical solution of the present application, the synchronous brake utilizes the pure mechanical braking principle so that the action of the synchronous brake is always consistent with the state of the power supply fan, and can intervene quickly before or just after the power supply fan reverses. As soon as the PSU fails or the power supply fan stops, the synchronous brake responds immediately and applies brakes before the fan reverses. Without the need for the transmission and processing of electronic signals, the response speed is faster, and preventive protection is achieved. It also effectively prevents system failures or performance degradation caused by the reversal of the power supply fan, avoids unexpected system shutdowns, thereby improving the reliability of the entire system and ensuring data security and business continuity. At the same time, since sensor detection and controller processing are omitted, the overall design is simplified, the number of components is reduced, and the overall manufacturing and maintenance costs are reduced.

[0035] The server provided in the embodiment of the present application has the same advantages as the above-mentioned system over the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0037] Figure 1 It is a schematic diagram of the overall structure of a PSU in the related art;

[0038] Figure 2 A diagram showing the position relationship between a power supply fan and a system fan in a PSU in the related art;

[0039] Figure 3 A schematic diagram of the status of a power supply fan when a PSU fails and loses power in the related art;

[0040] Figure 4 A schematic diagram of the overall structure of a PSU in which the PSU provided in an embodiment of the present application is normally powered;

[0041] Figure 5 A schematic diagram of the overall structure of a PSU when a PSU fails and loses power according to an embodiment of the present application;

[0042] Figure 6 A schematic diagram of the status of the power supply fan when the PSU fails and loses power according to an embodiment of the present application.

[0043] Reference numerals:

[0044] 1. Server; 2. PSU; 21. Power supply fan; 3. System fan; 4. Power supply secondary control microcontroller; 5. Synchronous brake; 51. Magnetic generator; 52. Elastic part; 53. Electromagnetic robotic arm. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] It is understandable that server 1 provides computing or application services for various types of clients in the network. With the increasing diversity of application scenarios and the explosive growth of users, many specific requirements have been given to the system architecture design of server 1. In the previous server system design, the system fan 3 was mainly located between the motherboard and the front hard disk, close to the front side of the chassis, and located at the back side of the server 1 chassis. The operation of the power supply fan 21 of PSU2 will not be affected by the system wind direction. With the upgrading of system architecture, such as Figure 3 and Figure 6 As shown, many current server 1 designs tend to arrange the air inlets of the system fan 3 and the power supply fan 21 of the PSU 2 in the same row or very close to each other, and the system wind direction of the system fan 3 is closely related to the operation of the power supply fan 21. The reliability of the power supply fan 21 is one of the key factors to ensure the long-term stable operation of the PSU 2. A power supply fan 21 with high reliability is extremely important for maintaining the long-term, stable and efficient working state of the PSU 2 and even the entire system.

[0047] It should be understood that the system fan 3 is mainly used for the heat dissipation of the entire system, exhausting hot air from the inside of the chassis to reduce the system temperature. The heat dissipation targets include the CPU, GPU, memory and other components. The system fan 3 is usually designed with high speed and high flow to ensure the thermal balance of the entire system, so the system fan 3 will form wind pressure in the chassis. The power supply fan 21 is a fan inside the PSU2, which is specially used for the heat load inside the PSU2 and the heat dissipation requirements of the power supply module. Therefore, if the thermal management failure caused by the reversal of the power supply fan 21 is serious, it will cause the system to shut down.

[0048] like Figure 1 As shown, Figure 1 It is a schematic diagram of the overall structure of PSU2 in the related technology; in the current design architecture of PSU2, the internal power supply fan 21 is only controlled by the internal DSP (Digital Signal Processor), and the rotor body of the fan is always in a waiting state and rotates with the action of external force.

[0049] When Figure 2 As shown, Figure 2 It is a position relationship diagram of the power supply fan 21 and the system fan 3 in the PSU2 in the related technology; when the inputs of the two PSU2s in the server 1 are normal or the PSU2 has no other faults and can output normally, the power supply fan 21 inside the PSU2 rotates forward, the air intake of the PSU2 is normal, and even if there is system back pressure, the PSU2 fan can ensure its normal forward rotation by increasing the speed.

[0050] When Figure 3 As shown, Figure 3 Schematic diagram of the state of the power supply fan 21 when the PSU2 fails and loses power in the related art. When any input of the two PSU2 in the server 1 loses power due to a fault, the power supply fan 21 stops rotating. At this time, the power supply fan 21 is affected by the system wind direction, the system fan 3 generates back pressure, the PSU2 is against the wind, and the power supply fan 21 reverses.

[0051] If PSU2 resumes power supply when the power supply fan 21 reverses, the power supply fan 21 will instantly recover from reverse rotation to forward rotation. Due to the large change in the rotor direction, the power supply fan 21 is prone to failure and damage, and both the power supply fan 21 and PSU2 cannot be used normally, reducing the reliability of the system power supply.

[0052] Even if the reversal stops and the fan 21 in the server 1 switches to forward rotation from the stopped state, the shaft and blades of the power supply fan 21 in the server 1 are designed with structural features according to the working direction before molding. Since the fan has reversed, the force on the fan during the reversal process is different from that in the normal rotation, which will increase the wear of the bearings and the stress concentration of the blades. Frequent reversals may even cause bearing damage and blade fracture and deformation. As a key component of the server system, the failure of PSU2 can easily lead to the collapse of the entire system. The failure of the entire machine requires troubleshooting the fault point and repairing or replacing the fan, which increases the maintenance cost and downtime of the system.

[0053] There are still many deficiencies in the improvement measures for fan anti-reversal in related technologies:

[0054] 1. It is necessary to add forward and reverse sensors and matching controller hardware, which makes the overall design complex and costly;

[0055] 2. The system will trigger the action only after detecting that the fan has reversed, and it relies on additional signal acquisition and processing. The sensor detection and controller processing time are delayed from the rotation state of the power supply fan 21, and the potential failure of the server system caused by the fan reversal is still not avoided;

[0056] 3. The structure of the fan itself needs to be modified, while the accessories of the server system have been standardized. The modification of the power supply fan 21 needs to consider the compatibility of the power supply fan 21 with the PSU 2 and other components, resulting in additional design and verification work, increasing the complexity and cost of production;

[0057] 4. It is fixedly installed on the power supply fan 21. In order to prevent the fan from rotating when it is reversed, it is always in physical contact with the rotating parts of the fan, but it will interfere with the rotation performance of the fan when the fan rotates normally.

[0058] In view of this, if Figure 4-Figure 6 As shown, Figure 4 The overall structural diagram of the PSU 2 of the present application when the PSU 2 is normally powered is shown; Figure 5 The overall structure diagram of the PSU2 of the present application is shown when the PSU2 fails and loses power; Figure 6 Schematic diagram showing the state of the power supply fan 21 when the PSU2 of the present application fails and loses power. Figure 4 and Figure 5 As shown, the first aspect of the embodiment of the present application is to provide a power supply fan system, including: a power supply unit, configured with a power supply fan 21; a synchronous brake 5, in active contact with the power supply fan 21; wherein, the synchronous brake 5 shares a circuit with the power supply unit, or shares a rotation path with the power supply fan 21; when the power supply fan 21 rotates forward, the synchronous brake 5 disengages from the power supply fan 21; when the power supply fan 21 is before reversing or starts to reverse, the synchronous brake 5 engages with the power supply fan 21.

[0059] Specifically, the power supply fan system provided in the embodiment of the present invention can be assembled on the server 1 to become a component of the server 1, so as to obtain a server 1 with a high reliability power supply. Among them, PSU2 is one of the core components of the server system, providing a stable power output to ensure that server components such as CPU, memory, storage devices and peripheral devices can operate normally. The internal components of PSU2 will generate a lot of heat when working, and the power supply fan 21 is set on PSU2 to discharge the heat and keep the temperature inside PSU2 within a safe range.

[0060] Among them, the synchronous brake 5 is used to prevent the power supply fan 21 from reversing. It is in active contact with the power supply fan 21. It can be understood that the synchronous brake 5 and the power supply fan 21 switch between a contact state and a separation state. When the power supply fan 21 rotates forward, it is in a separation state and does not prevent the rotation of the power supply fan 21; and when the power supply fan 21 stops, it is in a contact state to achieve braking.

[0061] In some specific embodiments, the synchronous brake 5 shares a circuit with the PSU 2. That is, when the PSU 2 is powered on normally, the synchronous brake 5 is also powered on; when the PSU 2 fails and loses power, the synchronous brake 5 is also powered off. Therefore, once the PSU 2 fails and loses power, the power supply fan 21 is powered off and stops rotating. When the power supply fan 21 has not started to reverse or is about to start to reverse, the synchronous brake 5 is in contact with the power supply fan 21, synchronized with the power supply state of the power supply fan 21, and brakes are immediately implemented.

[0062] In this embodiment, the synchronous brake 5 and the power supply fan 21 only need to be electrically connected, and there is no need to change the structure of the power supply fan 21 itself. When the synchronous brake 5 and the power supply fan 21 are in a separated state, they form a non-contact structure with the power supply fan 21, thereby avoiding direct interference with the fan rotation performance.

[0063] In some specific embodiments, the synchronous brake 5 shares part of the rotation path with the power supply fan 21. That is, the synchronous brake 5 and the rotating parts of the power supply fan 21 rotate in the same direction in the forward direction, and rotate in different directions in the reverse direction. At this time, the rotation paths are different, so the power supply fan 21 is prevented from rotating in a direction different from the rotation direction, and reverse locking is achieved. The specific description of this embodiment can be seen in the relevant part below.

[0064] Therefore, the synchronous brake 5 uses a purely mechanical braking principle to make the action of the synchronous brake 5 always consistent with the state of the power supply fan 21, and can intervene quickly before or just when the power supply fan 21 reverses. As soon as PSU2 fails and loses power or the power supply fan 21 stops, the synchronous brake 5 responds immediately and applies brakes before the fan reverses. Without the need for electronic signal transmission and processing, the response speed is faster, and preventive protection is achieved. This effectively prevents system failures or performance degradation caused by fan reversal, avoids unexpected system shutdowns, and improves the reliability of the entire system, ensuring data security and business continuity. At the same time, since sensor detection and controller processing are omitted, the overall design is simplified, the number of components is reduced, and the overall manufacturing and maintenance costs are reduced.

[0065] This embodiment is used to further illustrate a specific implementation method of the synchronous brake 5 and the power supply unit sharing a circuit.

[0066] The synchronous brake 5 includes a magnetic generator 51 and an electromagnetic mechanical arm 53 that are interconnected; wherein the power supply unit shares a circuit with the magnetic generator 51, and the power supply fan 21 is powered off synchronously with the power supply unit; when the power supply unit is powered normally, the power supply fan 21 rotates forward, and the magnetic generator 51 is attracted to the electromagnetic mechanical arm 53, so that the electromagnetic mechanical arm 53 is not in contact with the power supply fan 21; when the power supply unit is powered off, the power supply fan 21 stops rotating, and the magnetic generator 51 is disconnected from the electromagnetic mechanical arm 53, so that the electromagnetic mechanical arm 53 is engaged with the power supply fan 21.

[0067] Specifically, the magnetic generator 51 may include a magnetic core with high magnetic permeability and a coil wound on the magnetic core, the coil is electrically connected to the PSU2, and when the PSU2 is powered normally, the magnetic generator 51 is powered on to generate a magnetic field, thereby forming a magnetic force that attracts the electromagnetic mechanical arm 53. The electromagnetic mechanical arm 53 may be a metal guide rod / rod that can interact with magnetic force. In some embodiments, the electromagnetic mechanical arm 53 is a metal rod made of a magnetic material (such as iron or steel), which can be attracted by the magnetic generator 51, one end of which is connected to the magnetic core, and the other end can be moved to extend into the interior of the power supply fan 21. When the magnetic generator 51 is powered on, the electromagnetic mechanical arm 53 is attracted, thereby changing its position.

[0068] In this embodiment, the power supply fan 21 is powered off synchronously with the power supply unit, the PSU2 is connected to the power supply through the input terminal, and is connected to the chassis of the server 1 through the output gold finger. The power supply fan 21 can be connected in series with the PSU2. When the PSU2 is supplying power normally, the power supply fan 21 rotates synchronously to dissipate heat. When the PSU2 is powered off, the power supply fan 21 also stops rotating. Of course, the power supply fan 21 can be connected to the single-chip microcomputer of the server 1 to directly control the power supply state and rotation state of the power supply fan 21. When the PSU2 fails and loses power, the single-chip microcomputer can also control the power supply fan 21 to stop rotating to save energy.

[0069] Further, the magnetic generator 51 is connected to the electromagnetic mechanical arm 53 through the elastic member 52, so that the elastic member 52 can transmit force and movement between the electromagnetic mechanical arm 53 and the magnetic generator 51. Specifically, the magnetic core can be fixedly connected to the electromagnetic mechanical arm 53 through a spring, and the elastic member 52 is in a compressed state when the PSU2 is powered normally.

[0070] Therefore, in this embodiment, please continue to refer to Figure 4The power supply unit shares a circuit with the magnetic force generator 51, and the electromagnetic brake is directly synchronized with the state of the power supply fan 21. When the PSU2 is powered normally, the coil is energized, and the magnetic core generates a magnetic field. The magnetic field attracts the electromagnetic mechanical arm 53, and moves the electromagnetic mechanical arm 53 to a position away from the power supply fan 21 until there is no physical contact with the power supply fan 21 and no interference with the normal rotation of the power supply fan 21. The spring is in a compressed state to store elastic force.

[0071] Please continue reading Figure 5 and Figure 6 When PSU2 fails and loses power, the coil loses current supply and the magnetic field disappears. The spring releases the compression force to push the electromagnetic arm 53 out, and the electromagnetic arm 53 bounces to a position close to the power supply fan 21 until it engages with the power supply fan 21. Even if PSU2 is facing against the wind, it can prevent the power supply fan 21 from reversing.

[0072] In this way, the electromagnetic brake works synchronously with the power supply fan 21, braking is applied as soon as it stops, that is, before reversal occurs, and the time delay through sensor detection and controller processing is eliminated, which can significantly improve the protection level of the fan, greatly improve the reliability of the power supply fan 21 of PSU2, and reduce the risk of damage to the power supply fan 21, ultimately ensuring reliable power supply to the server system, especially in application scenarios that have extremely high requirements for power supply continuity and stable system operation.

[0073] In a specific embodiment, part or all of the electromagnetic mechanical arm 53 is made of magnetic material, such as iron or electromagnetic steel. In this embodiment, the electromagnetic mechanical arm 53 itself serves as a metal guide rod, and the magnetic force of the magnetic force generator 51 directly drives the electromagnetic mechanical arm 53.

[0074] As some explanations of this embodiment, the end of the electromagnetic mechanical arm 53, such as the end close to the magnetic force generator 51, can be made of magnetic material, or covered or embedded with magnetic material, so that when the magnetic force generator 51 is powered on, it can generate attraction with the magnetic force generator 51 and drive the entire electromagnetic mechanical arm 53 to move. Therefore, magnetic materials are used only in necessary areas, and non-magnetic materials, such as lightweight and high-strength materials, can be used for the rest. While the electromagnetic mechanical arm 53 can effectively respond to magnetic force, the weight, overall strength and mobility of the electromagnetic mechanical arm 53 can be flexibly controlled.

[0075] In some embodiments, a material with a high friction coefficient, such as silicone or wear-resistant rubber, is used at the portion of the electromagnetic mechanical arm 53 that can extend into the power supply fan 21 to enhance the engagement effect.

[0076] In some embodiments, a plurality of densely arranged engagement grooves are designed in the partial area where the electromagnetic mechanical arm 53 extends into the power supply fan 21. The engagement grooves are adapted to the edges of the blades of the power supply fan 21. The engagement grooves or engagement components cooperate with the fan blades so that the electromagnetic mechanical arm 53 can engage smoothly when extended, thereby improving the stability and reliability of the engagement and improving the effect of preventing reversal.

[0077] In some embodiments, a plurality of micro contact protrusions are designed in the partial area where the electromagnetic mechanical arm 53 extends into the power supply fan 21. The micro contact protrusions have multiple contact points when contacting the fan blades to prevent the blades from slipping.

[0078] In a specific implementation scheme, at least one magnetic block is provided on the electromagnetic mechanical arm 53. In this embodiment, the entire electromagnetic mechanical arm 53 can also be made of non-magnetic materials, and at least one magnetic block is provided on the electromagnetic mechanical arm 53. Among them, the magnetic block can be a small iron component or a block structure with high magnetic permeability, which is used to attract the magnetic generator 51. The use of the magnetic block can concentrate the magnetic field, increase the attraction, and enhance the mobility of the mechanical arm. When the magnetic generator 51 is energized, an electromagnetic field is formed to attract the magnetic block. The magnetic block is fixed on the electromagnetic mechanical arm 53 and attracts the magnetic generator 51, so that it overcomes the tension of the spring and moves in the direction of the magnetic generator 51. The electromagnetic mechanical arm 53 is driven to contract by the magnetic block. On the contrary, the electromagnetic field disappears, the magnetic block loses its attraction, and the electromagnetic mechanical arm 53 pops out into the fan according to the spring.

[0079] As some explanations of this embodiment, the number, position and size of the magnetic blocks can be adjusted as required to adapt to different magnetic field distributions of the magnetic force generator 51 and / or the structural forms of the electromagnetic mechanical arm 53. For example, a plurality of magnetic blocks can be evenly spaced around the periphery of the electromagnetic mechanical arm 53, and the shape of each magnetic block uses a standard circular or rectangular or other shape.

[0080] In a further technical solution, the magnetic generator 51 and the electromagnetic mechanical arm 53 are both arranged on the periphery of the power supply fan 21, and the electromagnetic mechanical arm 53 extends into or exits the power supply fan 21 through a hole provided on the fan shell of the power supply fan 21.

[0081] In the embodiment of the present application, the magnetic generator 51 and the electromagnetic mechanical arm 53 are both installed in the peripheral position outside the power supply fan 21, rather than inside the fan. When the power supply fan 21 is operating normally, the electromagnetic mechanical arm 53 does not directly physically contact the rotating parts of the fan, and the electromagnetic brake is only activated when needed, thereby avoiding interference with the normal operation of the power supply fan 21 and ensuring that the fan can maintain high efficiency during normal operation.

[0082] It can be known that the specifications of the server 1 and its internal electrical components are usually standardized to ensure compatibility and interchangeability. For example, the size, interface, shape, etc. of the fan. The power supply fan 21 usually has a fan housing, and the fan air inlet and exhaust port are designed on the fan housing, and additional heat dissipation holes are designed to further promote the dissipation of heat and enhance the heat dissipation effect of the fan. The air inlet and exhaust port are usually set on both sides of the fan housing, and the heat dissipation holes are usually set on the side or bottom of the fan housing.

[0083] Therefore, the electromagnetic mechanical arm 53 of the embodiment of the present application is implemented on the basis of the standardized design of the fan, and is applicable to the existing fan design and specifications. According to the reserved holes on the fan housing, such as the air inlet, the exhaust port or the heat dissipation hole, the holes on the fan housing allow the electromagnetic mechanical arm 53 to freely extend into or exit the interior of the power supply fan 21. Since there is no need to modify the fan housing, the cost is reduced, and the applicability and compatibility of the solution are improved.

[0084] In combination with the above embodiments, the magnetic block can be located on one end of the electromagnetic mechanical arm 53 close to the magnetic generator 51, and the distance between it and the end of the electromagnetic mechanical arm 53 close to the power supply fan 21 is greater than the moving stroke of the electromagnetic mechanical arm 53. Therefore, when the magnetic block drives the electromagnetic mechanical arm 53 to extend into the power supply fan 21, the magnetic block is still located outside the power supply fan 21, and the heat dissipation hole and the electromagnetic mechanical arm 53 can be used in coordination.

[0085] As a further explanation of this embodiment, the power supply unit is provided with a power supply secondary control microcontroller 4, which is used to detect the main output of the power supply unit, and the power supply unit is connected to the server 1 through an output gold finger. In this embodiment, the power supply secondary control microcontroller 4 is in synchronization with the PSU2 state, and the power supply secondary control microcontroller 4 is powered on, and the power-on and power-off states of the PSU2 are immediately synchronized. For example, the main output voltage of PSU2 (such as 12V) is a stable voltage provided by PSU2 for the server 1 or other equipment. The power supply secondary control microcontroller 4 monitors this voltage in real time. If the output voltage is detected to be within the normal range, it means that the input power supply of PSU2 is also normal, and no other internal faults have occurred. The fan inside PSU2 is considered to be able to operate normally, and there is no risk of reversal. If the main output voltage is detected to be abnormal, it indicates that the PSU2 has a power outage or other faults. In this case, the fan of PSU2 stops running, indicating that the electromagnetic brake is activated.

[0086] In combination with the above embodiments, in a specific implementation manner, the power supply unit is used to be assembled to the rear end of the server 1, the air inlet of the power supply fan 21 is located in the same row or nearby with the system fan 3 in the server 1, and the synchronous brake 5 is adjacent to the power supply fan 21; wherein the magnetic force generator 51 includes a magnetic core and a coil, the coil is connected in series with the power supply line of the power supply unit, and the magnetic core is connected to the electromagnetic mechanical arm 53 through a spring, so that: the magnetic core generates magnetic attraction to the electromagnetic mechanical arm 53 when the power supply unit supplies power, so that it is in a retracted state; the magnetic core releases the electromagnetic mechanical arm 53 when the power supply unit loses power, so that the electromagnetic mechanical arm 53 extends into the power supply fan 21 under the action of the spring; wherein the electromagnetic mechanical arm 53 is a guide rod, and the inner diameter of the electromagnetic mechanical arm 53 is smaller than that of the power supply fan 21. The aperture of the heat dissipation hole on the side of the fan shell of the fan 21; so that: when the electromagnetic mechanical arm 53 is retracted, the electromagnetic mechanical arm 53 extends out of the power supply fan 21 through the heat dissipation hole, allowing the power supply fan 21 to rotate forward without additional mechanical constraints; when the electromagnetic mechanical arm 53 is released, the electromagnetic mechanical arm 53 is inserted between the blades of the power supply fan 21 through the heat dissipation hole to prevent the power supply fan 21 from reversing; a metal shielding shell is provided on the power supply unit, and the metal shielding shell accommodates the magnetic generator 51 and the electromagnetic mechanical arm 53; and a hole is opened on one side of the metal shielding shell close to the power supply fan 21, which is used to allow the electromagnetic mechanical arm 53 to move freely in the hole; a fixed bracket is provided in the metal shielding shell, and the fixed bracket is used to support the electromagnetic mechanical arm 53, and the fixed bracket is made of non-magnetic material.

[0087] In this embodiment, a metal shielding shell is provided on the PSU 2, and the metal shielding shell covers at least part of the magnetic generator 51 and the electromagnetic mechanical arm 53, allowing the electromagnetic mechanical arm 53 to extend from the hole on the side. After extending out of the metal shielding shell, the outer edge contour of the electromagnetic mechanical arm 53 itself seals the hole, and the metal shielding shell forms a closed space to ensure that the electromagnetic field does not spread outward, and prevents the electromagnetic radiation generated by the magnetic generator 51 from spreading to other electrical components in the server 1. The metal shielding shell can also protect the magnetic generator 51, the electromagnetic mechanical arm 53 and the spring from dust, moisture and other contaminants.

[0088] A fixed bracket is provided to support the movement of the electromagnetic mechanical arm 53 , and the fixed bracket can be made of non-magnetic material to avoid mutual attraction with the magnetic force generator 51 to form an unnecessary magnetic circuit.

[0089] As a specific explanation of this embodiment, the use process of the embodiment of the present invention can be:

[0090] like Figure 4As shown, when the power secondary control microcontroller 4 inside PSU2 starts to detect the main output of PSU2, if the main output is normal, it is considered that the input of PSU2 must be normal (or there is no other abnormal fault). Under this working condition, the power fan 21 of PSU2 can operate normally without the risk of reversal. At this time, the synchronous brake 5 is energized, and the electromagnetic mechanical arm 53 is forced to move in the direction of the magnetic generator 51 and move out of the fan housing. When the power fan 21 rotates, there will be no structural interference with the electromagnetic mechanical arm 53, and there is no operational risk.

[0091] like Figure 5 and Figure 6 As shown, when the power supply secondary control microcontroller 4 inside PSU2 detects that the main output of PSU2 is abnormal, it is considered that the input of PSU2 is abnormal or other reasons are faulty, and the PSU2 fan stops rotating. When the system fan 3 of the server 1 is running at a high speed or full speed, the PSU2 fan is subject to back pressure and tends to rotate in the opposite direction. At this time, the synchronous brake 5 is powered off, and the electromagnetic mechanical arm 53 is not subject to suction and moves toward the power supply fan 21 and is inserted into the power supply fan 21. When the power supply fan 21 is subject to back pressure and is ready to reverse, it is blocked by the electromagnetic mechanical arm 53 and cannot rotate, which plays a role in preventing the power supply fan 21 from reversing from the source.

[0092] When the PSU2 with power failure or abnormal failure resumes normal output, the synchronous brake 5 is powered on again, and the electromagnetic mechanical arm 53 is retracted, allowing the fan to rotate freely. At this time, if the power supply fan 21 has a tendency to reverse due to the previous external force, it will remain in a stopped state due to the timely interception of the electromagnetic mechanical arm 53, and then the PSU2's own startup program controls the fan to start forward, avoiding the sudden change from reverse to forward or from stop to forward, and reducing the risk of damage.

[0093] This embodiment is used to further illustrate the specific implementation of the synchronous brake 5 and the power supply fan 21 sharing a part of the path. The synchronous brake 5 includes a check bearing (not shown in the figure), which is used to allow the power supply fan 21 to rotate freely in the forward direction and lock it when it is reversed; or, the synchronous brake 5 includes a ratchet and pawl mechanism (not shown in the figure), the ratchet is arranged on the fan shaft of the power supply fan 21, the pawl is arranged on the fan housing, and the meshing direction of the ratchet and the pawl is set to the reverse direction of the power supply fan 21.

[0094] Specifically, the rotating bearing of the power supply fan 21 can be removed and replaced with a check bearing, so that the power supply fan 21 can only rotate in the forward direction and will be locked in the reverse direction. The ratchet and pawl mechanism is a device that prevents reversal by meshing ratchet and pawl, the ratchet is fixed on the fan shaft, and the pawl is set on the fan housing. When the fan rotates forward, the ratchet and pawl will not mesh, and the fan can rotate freely. When the fan reverses, the ratchet and pawl mesh, locking the fan shaft, thereby preventing reversal. Therefore, the check bearing or ratchet and pawl mechanism is installed on the power supply fan 21, forming a contact structure with the power supply fan 21, and can automatically lock when the power supply fan 21 just starts to reverse, preventing the fan from rotating in the opposite direction, thereby improving the braking response.

[0095] Based on the same inventive concept, the second aspect of the present application provides a server 1, on which the power supply fan system provided in the first aspect of the present application is configured.

[0096] As for the server 1 embodiment, since it is basically similar to the system embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0097] It should also be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. In the description of this specification, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0098] It should also be noted that, in this article, the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal 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 a process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0099] The technical solution provided by the present invention is described in detail above. The principle and implementation mode of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the present invention, and the content of this specification should not be understood as limiting the present invention. At the same time, for those skilled in the art, according to the present invention, there will be different forms of changes in the specific implementation mode and application scope. It is not necessary and impossible to list all the implementation modes here, and the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A power supply fan system, characterized in that: include: A power supply unit, equipped with a power supply fan; a synchronous brake in active contact with the power supply fan; Wherein, the synchronous brake shares a circuit with the power supply unit, or shares a part of the rotation path with the power supply fan; When the power supply fan rotates forward, the synchronous brake is out of contact with the power supply fan; Before the power supply fan reverses or starts to reverse, the synchronous brake is engaged with the power supply fan.

2. The power supply fan system according to claim 1, characterized in that: The synchronous brake comprises a magnetic force generator and an electromagnetic mechanical arm connected to each other; Wherein, the power supply unit and the magnetic force generator share a circuit, and the power supply fan and the power supply unit are powered off synchronously; When the power supply unit supplies power normally, the power supply fan rotates forward, and the magnetic force generator is attracted to the electromagnetic mechanical arm, so that the electromagnetic mechanical arm is not in contact with the power supply fan; When the power supply unit loses power, the power supply fan stops rotating, and the magnetic force generator is disconnected from the electromagnetic mechanical arm, so that the electromagnetic mechanical arm is engaged with the power supply fan.

3. The power supply fan system according to claim 2, characterized in that: The synchronous brake further comprises an elastic member, and the magnetic force generator is connected to the electromagnetic mechanical arm via the elastic member; Wherein, the elastic member is in a compressed state during normal power supply.

4. The power supply fan system according to claim 2, characterized in that: At least part of the electromagnetic mechanical arm is made of magnetic material.

5. The power supply fan system according to claim 2, characterized in that: At least one magnetic attraction block is arranged on the electromagnetic mechanical arm.

6. The power supply fan system according to claim 2, characterized in that: The magnetic force generator and the electromagnetic mechanical arm are both arranged on the periphery of the power supply fan, and the electromagnetic mechanical arm extends into or exits the power supply fan through a hole provided on a fan shell of the power supply fan.

7. The power supply fan system according to any one of claims 2 to 6, characterized in that: The power supply unit is used to be assembled to the rear end of the server, the air inlet of the power supply fan is located in the same row or near the system fan in the server, and the synchronous brake is adjacent to the power supply fan; Wherein, the magnetic force generator includes a magnetic core and a coil, the coil is connected in series with the power supply circuit of the power supply unit, and the magnetic core is connected to the electromagnetic mechanical arm through a spring, so that: The magnetic core generates magnetic attraction to the electromagnetic mechanical arm when the power supply unit supplies power, so that the electromagnetic mechanical arm is in a contracted state; The magnetic core releases the electromagnetic mechanical arm when the power supply unit loses power, so that the electromagnetic mechanical arm extends into the power supply fan under the action of the spring; Wherein, the electromagnetic mechanical arm is a guide rod, and the inner diameter of the electromagnetic mechanical arm is smaller than the aperture of the heat dissipation hole on the side of the fan shell of the power supply fan; so that: When the electromagnetic mechanical arm is retracted, the electromagnetic mechanical arm extends out of the power supply fan through the heat dissipation hole, allowing the power supply fan to rotate forward without additional mechanical constraints; When the electromagnetic mechanical arm is released, the electromagnetic mechanical arm is inserted between the blades of the power supply fan through the heat dissipation hole to prevent the power supply fan from reversing; The power supply unit is provided with a metal shielding shell, and the magnetic force generator and the electromagnetic mechanical arm are accommodated in the metal shielding shell; and the metal shielding shell has a hole on one side close to the power supply fan, so as to allow the electromagnetic mechanical arm to move freely in the hole; A fixing bracket is arranged in the metal shielding shell, the fixing bracket is used to support the electromagnetic mechanical arm, and the fixing bracket is made of non-magnetic material.

8. The power supply fan system according to claim 1, characterized in that: The synchronous brake shares part of the rotation path with the power supply fan, and the synchronous brake comprises a check bearing, which is used to allow the power supply fan to rotate freely in the forward direction and be locked when reversed; or, the synchronous brake comprises a ratchet and pawl mechanism, the ratchet is arranged on the fan shaft of the power supply fan, the pawl is arranged on the fan housing, and the meshing direction of the ratchet and pawl is set to the reverse direction of the power supply fan.

9. The power supply fan system according to claim 1, characterized in that: The power supply unit is provided with a power secondary control single chip microcomputer, and the power secondary control single chip microcomputer is used to detect the main output of the power supply unit. The power supply unit is connected to the server through an output gold finger.

10. A server, characterized in that: The server is equipped with a power supply fan system as described in any one of claims 1-9.

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