Anti-backflow duct device and computer equipment

Abstract

The present invention relates to the field of computer technology, and discloses an anti-backflow air duct device and a computer device to solve the problem of poor heat dissipation effect of the power supply of the equipment caused by the backflow effect of the heat dissipation air inside the computer. The air duct member of the anti-backflow air duct device has an air duct cavity and a first vent and a second vent that are sequentially connected to the two ends of the air duct cavity. The air guide component includes a grille plate and a guide member, the grille plate is located at one end of the air duct cavity close to the first vent, and the grille plate is connected to the air duct member through the guide member. The air guide component has a diversion state and an anti-backflow state. When the air guide component is in the diversion state, the grille plate is located in the air duct cavity. When the air guide component is in the anti-backflow state, the grille plate is at least partially moved to the outside of the air duct cavity through the first vent to increase the diversion length of the air duct cavity. The anti-backflow air duct device provided by the present application can improve the heat dissipation and cooling effect inside the chassis.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to an anti-backflow air duct device and computer equipment. Background Art

[0002] Air-cooled servers mainly rely on fans inside the server to dissipate heat. Figure 1 and Figure 2 As shown in the figure, along the Y direction, the system fan located at the rear of the chassis draws air from the front window of the chassis, and the air flows through the motherboard module and the front window peripherals and is blown out from the rear window. In addition to the system fan, the server power supply also has a built-in fan (i.e., power supply fan), whose main function is to dissipate heat from the internal circuit of the power supply. The power supply fan and the system fan are set relatively independently.

[0003] Reference Figure 1 ,Since the system fan and power supply are set close to the rear window of the server chassis along the Y direction and are distributed in sequence along the X direction. In the heat dissipation control strategy, the speed control factor of the power supply fan involves the power supply air inlet temperature and the power supply internal circuit temperature. If the power supply air inlet and the power supply internal circuit temperature are high, the power supply fan speed is increased to achieve power supply temperature control.

[0004] However, when the system fan and the power supply fan are placed side by side in the X direction, there is usually a backflow problem. When the system temperature rises, the system fan quickly increases its speed to quickly ventilate and dissipate the increased temperature of the motherboard module. As the system fan speed increases, the air volume drawn by the system fan also increases, and the wind pressure on the air inlet side of the system fan and the air inlet side of the power supply have a high pressure difference. Based on this, if Figure 2 As shown in the figure, in addition to the original airflow path at the front of the chassis, a portion of the air volume will be drawn from the air duct of the power supply fan, that is, at least part of the air in the original power supply air flow path will be drawn and flow to the system fan. At this time, a backflow effect occurs, causing the amount of air drawn by the power supply fan to flow through the internal circuit of the power supply to be sharply reduced, that is, the heat dissipation effect of the power supply is sharply reduced, which will cause the power supply to overheat, alarm, or even burn out. Summary of the invention

[0005] In view of this, the present invention provides an anti-backflow air duct device and a computer device to solve the problem of poor heat dissipation effect of the device power supply caused by the backflow effect of the heat dissipation air inside the computer.

[0006] In a first aspect, the present invention provides an anti-backflow air duct device, comprising an air duct member and a guide assembly. The air duct member has an air duct cavity and a first vent and a second vent that are sequentially connected to the two ends of the air duct cavity. The guide assembly comprises a grille plate and a guide member, the grille plate is located at one end of the air duct cavity close to the first vent, and the grille plate is connected to the air duct member through the guide member. The guide assembly has a guide state and an anti-backflow state. When the guide assembly is in the guide state, the grille plate is located in the air duct cavity. When the guide assembly is in the anti-backflow state, the grille plate is at least partially moved to the outside of the air duct cavity through the first vent to increase the guide length of the air duct cavity.

[0007] Beneficial effect: The anti-backflow air duct device provided by the embodiment of the present invention has an air duct member enclosing an air duct cavity for air diversion, and the air is allowed to flow in the air duct cavity through the first vent and the second vent at both ends of the air duct cavity. An air diversion assembly including a grille plate and a guide is provided at one end of the air duct cavity close to the first vent, and the grille plate is connected to the air duct member through the guide so that the air diversion assembly can switch and adjust between a diversion state and an anti-backflow state. When the air diversion assembly is in the diversion state, the grille plate is located in the air duct cavity so that air can flow smoothly through the air duct cavity. When the air diversion assembly is in the anti-backflow state, the grille plate is at least partially moved to the outside of the air duct cavity through the first vent to increase the diversion length of the air duct cavity, thereby avoiding the backflow effect caused by the large wind pressure difference near the periphery of the first vent.

[0008] For example, the higher wind pressure at the first vent causes the air at the first vent to flow to the position with lower wind pressure on the surrounding side, thereby reducing the air flow rate flowing into the air duct cavity through the first vent. In the process of heat dissipation and cooling by air, the above situation will cause the air flow rate flowing out of the air duct cavity through the second vent to decrease, thereby greatly weakening the original heat dissipation and cooling effect of the components, thereby causing the corresponding components to overheat, alarm or even burn out. However, by arranging a guide assembly including a grille plate and a guide member in the air duct member, the anti-backflow air duct device can be applied to computer equipment such as servers to improve the backflow effect.

[0009] For example, the anti-backflow duct device is installed at the power supply air inlet at the rear window of the server. When the speed of the system fan increases rapidly so that the wind pressure on the air inlet side of the system fan is much lower than the wind pressure at the power supply air inlet, the guide assembly is moved from the guide state to the anti-backflow state so that the grille plate moved outside the air duct cavity can increase the guide length of the air duct cavity. This is equivalent to extending the position of the power supply air inlet from the first vent upstream. Since the wind pressure difference between the extended power supply air inlet and the wind pressure upstream of the system fan at this position is greatly reduced or there is no pressure difference, the air at the power supply air inlet is prevented from being sucked in by the high-speed rotating system fan, or the suction amount is reduced so that the power supply fan can continue to draw sufficient air for heat dissipation and cooling. That is, by weakening or avoiding the backflow effect, the power supply of the equipment can maintain a good heat dissipation effect.

[0010] In an optional embodiment, the backflow prevention duct device further includes a driving mechanism, the driving mechanism is connected to the duct member and / or the guide member, and one end of the driving mechanism is connected to the grille plate. Taking the plane where the first vent is located as the reference plane, within the reference plane, the wind pressure at the first vent is defined as the first wind pressure, and the wind pressure outside the first vent is defined as the second wind pressure. The driving mechanism is configured as:

[0011] When the first wind pressure is higher than the second wind pressure preset pressure value, the driving mechanism drives the grille plate to move from the diversion state to the backflow prevention state. Otherwise, the driving mechanism drives the grille plate to be in the diversion state.

[0012] In an optional embodiment, the guide member includes a rotating shaft, and the grille plate is rotatably connected to the air duct member via the rotating shaft, so that the grille plate can be rotatably adjusted between the flow guiding state and the backflow preventing state.

[0013] In an optional embodiment, the guide member includes at least one of a first stopper and a second stopper. The first stopper is connected to the air duct member, and when the grille plate rotates from the flow guiding state to the backflow prevention state, the first stopper contacts the grille plate to prevent the grille plate from continuing to rotate. The second stopper is connected to the air duct member, and when the grille plate rotates from the backflow prevention state to the flow guiding state, the second stopper contacts the grille plate to prevent the grille plate from continuing to rotate.

[0014] In an optional embodiment, the driving mechanism includes an elastic member. One end of the elastic member is connected to the guide member and / or the air duct member, and the other end of the elastic member is connected to the grille plate. When the grille plate is in the backflow prevention state, the elastic member is in a stretched state or a compressed state and accumulates elastic potential energy. When the grille plate is in the flow diversion state, the elastic potential energy of the elastic member decreases.

[0015] In an optional embodiment, when the grille plate is in the backflow prevention state, the wind pressure acting on the grille plate by the pressure difference between the first wind pressure and the second wind pressure is greater than or equal to the elastic force of the elastic member.

[0016] In an optional embodiment, when the guide member includes a rotating shaft, the driving mechanism further includes a torsion spring, which is plug-connected and installed with the rotating shaft along the axial direction of the rotating shaft, one end of the torsion spring contacts the grille plate, and the other end of the torsion spring contacts the air duct member, and when the grille plate is in a backflow prevention state, the torsion spring accumulates elastic potential energy. When the grille plate is in a flow diversion state, the elastic potential energy of the torsion spring decreases.

[0017] In some embodiments, the elastic force F1 of the torsion spring acting on the grille plate is k×θ×L / 2. The pressure difference between the first wind pressure and the second wind pressure acts on the grille plate as a pressure difference force F2=△P×S. When the pressure difference force is greater than the elastic force, that is, F2≥F1, the grille plate is rotated from the diversion state to the backflow prevention state. Among them, k is the stiffness coefficient of the torsion spring, θ is the rotation angle of the grille plate compared to the diversion state, S is the area of ​​the grille plate, and △P is the difference between the first wind pressure and the second wind pressure.

[0018] In an optional embodiment, the air duct cavity is extended along the first straight line direction at least at the first vent. There are multiple grille plates, and one grille plate is connected to the air duct member through at least one guide. When the flow guide assembly is in the flow guide state and / or the backflow prevention state, the multiple grille plates are spaced apart along the second straight line direction. The first straight line direction is perpendicular to the second straight line direction.

[0019] In an optional embodiment, when the flow guiding assembly is in the flow guiding state and / or the backflow preventing state, the length dimension of the grid plate along the first straight line direction is smaller than the spacing dimension between two adjacent grid plates along the second straight line direction.

[0020] In an optional embodiment, the driving mechanism further includes a power member and an adjustment module, one end of the power member is connected to the air duct member, and the other end of the power member is connected to the grille plate. The adjustment module is connected to the power member, and the adjustment module is configured as follows:

[0021] When the first wind pressure is higher than the second wind pressure preset pressure value, the regulating module controls the power component to drive the grille plate to move from the diversion state to the backflow prevention state. Otherwise, the regulating module controls the power component to keep the grille plate in the diversion state.

[0022] In an optional embodiment, the power member includes a drive motor, and the regulating module is control-connected to the drive motor. The output end of the drive motor is used to drive the grid plate to move and switch between the diversion state and the backflow prevention state.

[0023] In an optional embodiment, the power member further includes a driving connecting rod and a driving cylinder, one end of the driving connecting rod is connected to the air duct member, and the other end of the driving connecting rod is connected to the grille plate. The driving cylinder is connected between the driving connecting rods, or the driving cylinder is connected between the driving connecting rod and the air duct member. The regulating module is control-connected to the driving cylinder to control the grille plate to move and switch between the diversion state and the backflow prevention state.

[0024] In a second aspect, the present invention provides a computer device, including a chassis, a power module, a chassis fan, and the anti-backflow air duct device in the previous aspect. A accommodating chamber is provided in the chassis, and an air outlet is provided at one end of the accommodating chamber along a first straight line direction. The power module is installed in the accommodating chamber and is arranged close to the air outlet along the first straight line direction. Along the first straight line direction, the end of the power module away from the air outlet is the air inlet end, and the air inlet end is connected to the second vent. A module fan is provided in the power module to drive air to flow into the power module through the air duct along the first straight line direction. In the accommodating chamber, along the first straight line direction, the chassis fan is arranged close to the air inlet end of the power module to drive air to flow through the chassis fan along the first straight line direction. And the chassis fan is arranged on one side of the power module along the second straight line direction, and the second straight line direction is arranged perpendicular to the first straight line direction.

[0025] Beneficial effect: By setting the anti-backflow air duct device, the position state of the grille plate in the computer equipment chassis can be flexibly switched between the diversion position state and the anti-backflow position state. When the speed of the chassis fan increases rapidly, the grille plate is switched to the anti-backflow state to prevent the leakage of air on the air inlet side of the power module, thereby ensuring that there is sufficient air inside the power module for heat dissipation and cooling. When the speed of the chassis fan decreases, the grille plate automatically returns to the diversion state, which will not affect the heat dissipation effect of the system motherboard and the power module.

[0026] Furthermore, since the computer device is a structural side solution corresponding to the anti-backflow air duct device in the above aspect, the computer device has all the beneficial effects of the above-mentioned anti-backflow air duct device, which will not be repeated here.

[0027] In an optional embodiment, the computer device further includes a main control module, which is connected to at least the chassis fan and the module fan. The main control module is configured to: when the internal temperature of the chassis is less than or equal to a preset temperature, the main control module adjusts the rotation speed of the chassis fan and the rotation speed of the module fan so that the wind pressure difference between the air inlet side of the chassis fan and the first vent is less than the preset wind pressure value. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the first air duct structure of the power supply and system fan inside the server in the related art;

[0030] Figure 2 It is a schematic diagram of the second air duct structure of the power supply and system fan inside the server in the related art;

[0031] Figure 3 A schematic structural diagram of a first anti-backflow air duct device in a flow guiding state provided by an embodiment of the present invention;

[0032] Figure 4 A schematic structural diagram of a first anti-backflow air duct device provided in an embodiment of the present invention in an anti-backflow state;

[0033] Figure 5 A schematic structural diagram of a second anti-backflow air duct device provided by an embodiment of the present invention in a flow guiding state;

[0034] Figure 6 A schematic structural diagram of a second anti-backflow air duct device provided by an embodiment of the present invention in an anti-backflow state;

[0035] Figure 7 A schematic diagram of the partial structure of a third anti-backflow air duct device provided in an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of a connection structure of a driving mechanism provided by an embodiment of the present invention;

[0037] Fig. 9 The anti-backflow air duct device provided in the embodiment of the present invention includes a schematic diagram of the structure of a driving motor;

[0038] Fig.10 The anti-backflow air duct device provided for the embodiment of the present invention includes a structural schematic diagram of a driving cylinder;

[0039] Fig.11 A schematic diagram of a structure of a computer device in a diversion state provided by an embodiment of the present invention;

[0040] Fig.12 A schematic diagram of a structure of a computer device in an anti-backflow state provided by an embodiment of the present invention;

[0041] Fig.13 A computer device provided in an embodiment of the present invention includes a schematic diagram of a connection structure of a main control module;

[0042] Fig.14 It is a curve relationship diagram of fan speed and wind pressure.

[0043] In the figure:

[0044] 100. Computer equipment;

[0045] 10. Anti-backflow air duct device;

[0046] 11. air duct member; 111. air duct cavity; 112. first vent; 113. second vent;

[0047] 12. flow guide assembly; 121. grille plate; 122. guide member; 1221. rotating shaft; 1222. guide portion; 1223. first stop member; 1224. second stop member;

[0048] 13. Driving mechanism; 131. Elastic member; 132. Torsion spring; 133. Power member; 1331. Driving motor; 1332. Driving connecting rod; 1333. Driving cylinder; 134. Adjusting module;

[0049] 20. chassis; 21. receiving chamber; 22. air outlet;

[0050] 30. Power module; 31. Module fan; 32. Power board;

[0051] 40. Chassis fan; 50. Main control module; 60. System main board. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0053] Air-cooled servers mainly rely on fans inside the server to dissipate heat. Figure 1 and Figure 2 As shown, Figure 1 It is a schematic diagram of the first air duct structure of the power supply and system fan inside the server in the related art. Figure 2This is a schematic diagram of the second air duct structure of the power supply and system fan inside the server in the related art. Along the Y direction, the system fan located at the rear of the chassis draws air from the front window of the chassis, and the air flows through the motherboard module and the front window peripherals and blows out from the rear window. In addition to the system fan, the server's power supply will also have a built-in fan (i.e., the power supply fan), whose main function is to dissipate heat from the internal circuit of the power supply. The power supply fan and the system fan are relatively independent.

[0054] Reference Figure 1 ,Since the system fan and power supply are set close to the rear window of the server chassis along the Y direction and are distributed in sequence along the X direction. In the heat dissipation control strategy, the speed control factor of the power supply fan involves the power supply air inlet temperature and the power supply internal circuit temperature. If the power supply air inlet and the power supply internal circuit temperature are high, the power supply fan speed is increased to achieve power supply temperature control.

[0055] However, when the system fan and the power supply fan are placed side by side in the X direction, there is usually a backflow problem. When the system temperature rises, the system fan quickly increases its speed to quickly ventilate and dissipate the increased temperature of the motherboard module. As the system fan speed increases, the air volume drawn by the system fan also increases, and the wind pressure on the air inlet side of the system fan and the air inlet side of the power supply have a high pressure difference. Based on this, if Figure 2 As shown in the figure, in addition to the original airflow path at the front of the chassis, a portion of the air volume will be drawn from the air duct of the power supply fan, that is, at least part of the air in the original power supply air flow path will be drawn and flow to the system fan. At this time, a backflow effect occurs, causing the amount of air drawn by the power supply fan to flow through the internal circuit of the power supply to be sharply reduced, that is, the heat dissipation effect of the power supply is sharply reduced, which will cause the power supply to overheat, alarm, or even burn out.

[0056] Combine the following Figures 3 to 14 The invention describes an anti-backflow air duct device and a computer device provided by the present invention, so as to solve the problem that the backflow effect of the heat dissipation air inside the computer causes the heat dissipation effect of the device power supply to deteriorate.

[0057] On the one hand, an embodiment of the present invention provides an anti-backflow air duct device, such as Figure 3 and Figure 4 As shown, the anti-backflow air duct device 10 includes an air duct member 11 and a guide assembly 12. The air duct member 11 has an air duct cavity 111 and a first vent 112 and a second vent 113 that are sequentially connected to both ends of the air duct cavity 111. The guide assembly 12 includes a grille plate 121 and a guide member 122, the grille plate 121 is located at one end of the air duct cavity 111 close to the first vent 112, and the grille plate 121 is connected to the air duct member 11 through the guide member 122.

[0058] The flow guide assembly 12 has Figure 3 The diversion status and Figure 4When the flow guide assembly 12 is in the anti-backflow state Figure 3 In the diversion state shown, the grille plate 121 is located in the air duct cavity 111. When the diversion assembly 12 is in the backflow prevention state, the grille plate 121 at least partially moves outside the air duct cavity 111 through the first vent 112 to increase the diversion length of the air duct cavity 111.

[0059] The anti-backflow duct device 10 provided in the embodiment of the present invention has an air duct member 11 which is surrounded by an air duct cavity 111 for air diversion, and the air is allowed to flow in the air duct cavity 111 through the first vent 112 and the second vent 113 at both ends of the air duct cavity 111. An air diversion assembly 12 including a grille plate 121 and a guide member 122 is provided at one end of the air duct cavity 111 close to the first vent 112. The grille plate 121 is connected to the air duct member 11 through the guide member 122, so that the air diversion assembly 12 can be switched between the diversion state and the anti-backflow state. When the air diversion assembly 12 is in Figure 3 In the diversion state shown, the grille plate 121 is located in the air duct cavity 111, so that air can flow smoothly through the air duct cavity 111. Figure 4 In the backflow prevention state shown, the grille plate 121 is at least partially moved outside the air duct cavity 111 through the first vent 112 to increase the flow guide length of the air duct cavity 111, thereby avoiding the backflow effect caused by the large wind pressure difference around the first vent 112.

[0060] For example, the first vent 112 has a relatively high wind pressure, so that part of the air in the first vent 112 is lost to the position with lower wind pressure on the surrounding side, thereby reducing the air flow rate flowing into the air duct cavity 111 through the first vent 112. In the process of heat dissipation and cooling by air, the above situation will cause the air flow rate flowing out of the air duct cavity 111 through the second vent 113 to be reduced, so as to greatly weaken the original heat dissipation and cooling effect of the components, thereby causing the corresponding components to overheat, alarm or even burn out. However, by arranging a guide assembly 12 including a grille plate 121 and a guide member 122 in the air duct member 11, the anti-backflow air duct device 10 can be applied to computer equipment such as servers to improve the backflow effect.

[0061] For example, the anti-backflow duct device 10 is installed at the power supply air inlet at the rear window of the server. When the rotation speed of the system fan increases rapidly so that the wind pressure on the air inlet side of the system fan is much lower than the wind pressure at the power supply air inlet, the guide component 12 is moved from the guide state to the anti-backflow state, so that the grille plate 121 moved outside the air duct cavity 111 can increase the guide length of the air duct cavity 111. This is equivalent to extending the position of the power supply air inlet from the first vent 112 upstream. Since the wind pressure difference between the extended power supply air inlet and the wind pressure upstream of the system fan at this position is greatly reduced or there is no pressure difference, the air at the power supply air inlet is prevented from being sucked in by the high-speed rotating system fan, or the suction amount is reduced, so that the power supply fan can continue to draw sufficient air for heat dissipation and cooling. That is, by weakening or avoiding the backflow effect, the power supply of the equipment can maintain a good heat dissipation effect.

[0062] In some embodiments, Figure 3 and Figure 4 As shown, the backflow prevention duct device 10 also includes a driving mechanism 13, which is connected to the duct member 11 and / or the guide member 122, and one end of the driving mechanism 13 is connected to the grille plate 121. Taking the plane where the first vent 112 is located as the reference plane, within the reference plane (i.e., the plane perpendicular to the Y direction at the first vent 112), the wind pressure at the first vent 112 is defined as the first wind pressure, and the wind pressure outside the first vent 112 is defined as the second wind pressure. The driving mechanism 13 is configured as:

[0063] When the first wind pressure is higher than the second wind pressure preset pressure value, Figure 3 As shown, it can be considered that the first wind pressure at K1 is higher than the second wind pressure preset value at K2, which will cause part of the air that originally flows into the air duct cavity 111 through the first vent 112 to flow to K2, so that the amount of air entering the air duct cavity 111 is reduced. Figure 3 The diversion state shown moves to Figure 4 The anti-backflow state shown can reduce the amount of air leakage toward K2 along the X direction. Otherwise, the driving mechanism 13 drives the grille plate 121 to be in the diversion state. At this time, the grille plate 121 in the diversion state (i.e., located inside the air duct cavity 111) will not hinder the air at K2 from flowing to the air duct cavity 111 through the first vent 112. Fig.11 , which is beneficial to increase the air flow rate flowing through the air duct cavity 111.

[0064] In this way, the configuration of the driving mechanism 13 enables the grille plate 121 to automatically switch and move between the diversion state and the anti-backflow state. For example, when the wind pressure at the first vent 112 is small, so that the first wind pressure is higher than the second wind pressure preset air pressure value, the driving mechanism 13 can drive the grille plate 121 to move from the diversion state to the anti-backflow state, thereby preventing the air near the first vent 112 from being extracted at high speed by other fan structures on the surrounding side, or reducing the extraction amount. In other cases, the driving mechanism 13 drives the grille plate 121 to maintain the diversion state of the initial position. In this way, through the automatically switched driving mechanism 13 and the diversion assembly 12, the anti-backflow air duct device 10 can automatically switch and adjust the diversion state and the anti-backflow state according to the preset conditions, so as to respond immediately to the change of the pressure difference.

[0065] Alternatively, the grid plate 121 may be switched between the flow guiding state and the backflow preventing state through manual operation by the user.

[0066] In some embodiments, Figure 3 and Figure 4 As shown, the air duct cavity 111 is extended along a first straight line direction at least at the first vent 112, and the first straight line direction is the Y direction in the figure. Alternatively, the air duct cavity 111 can also be a straight air duct structure arranged along the Y direction.

[0067] When the flow guide component 12 is in Figure 3 The diversion state shown or Figure 4 In the backflow prevention state shown, a grille plate 121 is arranged along the second straight line direction close to one side of the air duct member 11, and the second straight line direction is the X direction in the figure. That is, the grille plate 121 in the flow guiding state or the backflow prevention state is arranged parallel to the first straight line direction and perpendicular to the second straight line direction. The first straight line direction is arranged perpendicular to the second straight line direction.

[0068] Here, it is taken as an example that air flows sequentially through the first vent 112 , the air duct cavity 111 and the second vent 113 along the Y direction. In this case, the first vent 112 is the air inlet of the air duct cavity 111 , and the second vent 113 is the air outlet of the air duct cavity 111 .

[0069] When the grille plate 121 is in the flow-guiding state or the backflow prevention state, one grille plate 121 is arranged close to the air duct cavity 111 along the second straight line direction, so that the side of the air duct member 11 can extend upstream of the air flow when the grille plate 121 is in the backflow prevention state, thereby avoiding the backflow phenomenon caused by the large external negative pressure at the periphery of the air duct member 11 in the side direction, or reducing the outflow of air at the first vent 112 during the backflow phenomenon. That is, by adjusting the installation position of the grille plate 121, at least one of the outside of the air duct member 11 is extended, thereby avoiding the situation where the local large negative pressure near the outside causes the air to flow out of the first vent 112, and the structure is simple and effective.

[0070] It should be noted that, in the embodiment of the present invention, when the grid plate 121 automatically switches between the diversion state and the backflow prevention state, since the grid plate 121 has different installation methods, the grid plate 121 has different movement methods during the switching process.

[0071] In some embodiments, Figure 3 and Figure 4 As shown, the guide member 122 includes a rotating shaft 1221, and the grille plate 121 is rotatably connected to the air duct member 11 via the rotating shaft 1221, so that the grille plate 121 can be rotated and adjusted between the flow guiding state and the backflow preventing state. It can also be regarded as that the grille plate 121 is flipped and adjusted between the flow guiding state and the backflow preventing state. Among them, the axis of the rotating shaft 1221 can be set perpendicular to the X direction and the Y direction, which is not limited.

[0072] By setting the rotating shaft 1221, the grid plate 121 can be rotated 180 degrees to switch and adjust between the diversion state and the backflow prevention state, which is relatively convenient.

[0073] Or, if Figure 5 and Figure 6 As shown, the guide member 122 also includes a guide portion 1222, which is arranged along the first linear direction (i.e., the Y direction). Along the third linear direction (not shown in the figure), two guide portions 1222 are respectively arranged on opposite sides of the inner wall of the air duct member 11, and the third linear direction is arranged perpendicular to the first linear direction and the second linear direction. Along the third linear direction, the grille plate 121 is installed between the two guide portions 1222, and the guide portion 1222 can be a guide rail structure or a guide groove structure extending along the Y direction, so that the grille plate 121 can be arranged along the Y direction. Figure 5 The diversion status and Figure 6 Slide to switch between the backflow prevention states shown.

[0074] That is, by setting the guide portion 1222, the grille plate 121 can be partially or completely located in the air duct cavity 111 along the Y direction to maintain the air guiding state. Alternatively, the grille plate 121 can also be slid out of the air duct cavity 111 along the Y direction toward the side away from the second vent 113, so that the grille plate 121 extending upstream increases the extension length of the air duct cavity 111 upstream.

[0075] Wherein, at the first vent 112 of the air duct member 11, the air guide assembly 12 may be provided with a grille plate 121. Take the second straight line direction (i.e., the X direction) as the left-right direction as an example. A grille plate 121 may be installed on the left side of the air duct member 11 to prevent the low pressure source on the left side from extracting the air at the first vent 112. Alternatively, a grille plate 121 may be installed on the right side of the air duct member 11 to prevent the low pressure source on the right side from extracting the air at the first vent 112.

[0076] In some embodiments, there are multiple grille plates 121, and one grille plate 121 is connected to the air duct member 11 through at least one guide member 122. When the air guide assembly 12 is in the air guide state and / or the backflow prevention state, such as Figure 3 and Figure 5 As shown, a plurality of grid plates 121 are distributed at intervals along the second straight line direction.

[0077] In this way, by setting a plurality of grid plates 121 to be spaced apart along the X direction, when the plurality of grid plates 121 are all in the flow-guiding state, the grid plates 121 partially or completely located in the air duct cavity 111 will not prevent the air from flowing smoothly into the air duct cavity 111 through the first vent 112 along the Y direction. When the plurality of grid plates 121 are switched to the anti-backflow state, the plurality of grid plates 121 extending upstream are arranged to facilitate multi-level control of obstruction in the X direction, so as to reduce the leakage of air from the first vent 112 to both ends, which is conducive to maintaining a larger air volume at the second vent 113.

[0078] It should be noted that, when the grille plate 121 is connected to the inner side of the air duct member 11 through the guide portion 1222 so that the grille plate 121 slides forward and backward along the Y direction, along the X direction, the negative pressure source outside the air duct member 11 can be located on the left or right side of the first vent 112, or can exist on both the left and right sides.

[0079] In addition, when the grille plate 121 is rotatably connected to the air duct member 11 via the rotating shaft 1221, as shown in FIG. Figure 4 As shown, the multiple grid plates 121 rotate (or flip) from the diversion state to the backflow prevention state in the counterclockwise direction as an example. At this time, the negative pressure source outside the air duct member 11 is arranged on the left side of the air duct member 11 along the X direction.

[0080] Alternatively, taking the case where the grid plates 121 rotate clockwise from the flow guiding state to the backflow preventing state, the negative pressure source outside the air duct member 11 is disposed on the right side of the air duct member 11 along the X direction.

[0081] In some embodiments, when the flow guide assembly 12 is in the flow guide state and / or the backflow prevention state, the length dimension of the grid plate 121 along the first straight line direction (ie, the Y direction) is smaller than the spacing dimension between two adjacent grid plates 121 along the second straight line direction (ie, the X direction).

[0082] like Figure 3 and Figure 5 As shown in FIG. 1 , when the grid plate 121 is in the diversion state, the outline dimension of the grid plate 121 in the Y direction is defined as the length dimension of the grid plate 121. Figure 4 and Figure 6 In the backflow prevention state shown, the length dimension of the grid plate 121 is also the outline dimension in the Y direction.

[0083] The above solution can make the multiple grid plates 121 reasonably and spaced apart along the X direction. Figure 3 and Figure 4 Taking the multiple grille plates 121 rotatably connected to the air duct member 11 via the rotating shaft 1221 as an example, by setting the distance between two adjacent grille plates 121 along the X direction to be greater than the length dimension of the grille plate 121, the grille plate 121 can be smoothly rotated and switched between the diversion state and the backflow prevention state.

[0084] In some embodiments, Figure 3 and Figure 4 As shown, the guide member 122 includes at least one of a first stopper 1223 and a second stopper 1224. The first stopper 1223 is connected to the air duct member 11. When the grille plate 121 rotates from the flow guiding state to the backflow preventing state, the first stopper 1223 contacts the grille plate 121 to prevent the grille plate 121 from continuing to rotate. The second stopper 1224 is connected to the air duct member 11. When the grille plate 121 rotates from the backflow preventing state to the flow guiding state, the second stopper 1224 contacts the grille plate 121 to prevent the grille plate 121 from continuing to rotate.

[0085] Taking the case where the grille plate 121 rotates counterclockwise from the diversion state to the backflow prevention state as an example, when the grille plate rotates counterclockwise, the windward side is defined as the outer side and the leeward side is defined as the inner side. Figure 3 Turn the diversion state shown counterclockwise to Figure 4 In the backflow prevention state shown in FIG. 1 , the first stopper 1223 contacts the outer side of the grid plate 121 to prevent the grid plate 121 from continuing to rotate in the counterclockwise direction. Figure 4Turn the backflow prevention position clockwise to Figure 3 In the diversion state shown, the second stopper 1224 contacts the inner side surface of the grid plate 121 to prevent the grid plate 121 from continuing to rotate in the clockwise direction.

[0086] Even if the grille plate 121 is configured to slide and switch between the flow guiding state and the backflow preventing state along the Y direction, the first stopper 1223 and the second stopper 2334 can also prevent the grille plate 121 from continuing to slide along the Y direction toward the side away from the second vent 113 in the backflow preventing state, and prevent the grille plate 121 from continuing to slide along the Y direction toward the side close to the second vent 113 in the flow guiding state.

[0087] That is, by disposing the first limiting member 1223 and the second limiting member 1224 , the grid plate 121 can be accurately switched and adjusted between the flow guiding state and the backflow preventing state.

[0088] It should be noted that the first stopper 1223 and the second stopper 1224 can be installed and set as needed. The first stopper 1223 and the second stopper 1224 can be split components and both are connected to the air duct member 11. Figure 4 The first stopper 1223 is disposed on a side of the rotating shaft 1221 away from the second vent 113 along the Y direction, and the second stopper 1224 is disposed on a side of the rotating shaft 1221 close to the second vent 113 along the Y direction.

[0089] Alternatively, the first limiting member 1223 and the second limiting member 1224 may be provided as an integrated component, which is not limited thereto.

[0090] In some embodiments, Figure 3 and Figure 4 As shown, the driving mechanism 13 includes an elastic member 131, one end of the elastic member 131 is connected to the guide member 122 and / or the air duct member 11, and the other end of the elastic member 131 is connected to the grid plate 121. When the grid plate 121 is in the backflow prevention state, the elastic member 131 is in a stretched state or a compressed state and accumulates elastic potential energy. When the grid plate 121 is in the flow diversion state, the elastic potential energy of the elastic member 131 is reduced.

[0091] Exemplarily, the elastic member 131 may be a structure such as a spring or an elastic rope. The elastic member 131 is arranged around the rotating shaft 1221 in the counterclockwise direction and the two ends are connected to the grid plate 121 and the air duct member 11. When the grid plate 121 is in the diversion state, the elastic member 131 is not subjected to force or is in a slightly stretched state, so that the grid plate 121 maintains a stable diversion state without being subjected to external force or a small external force. When the grid plate 121 rotates counterclockwise from the diversion state under the action of the negative pressure airflow, the elastic member 131 is driven to stretch synchronously. When the grid plate 121 rotates to the anti-backflow state, the elastic member 131 is in a stretched state and accumulates the maximum elastic potential energy. If the external force (such as the force of the negative pressure airflow) weakens or disappears, the elastic member 131 with the accumulated elastic potential energy can drive the grid plate 121 to rotate to the position of the diversion state until the elastic potential energy of the elastic member 131 is reduced or in the initial state.

[0092] Based on this, through the installation of the elastic member 131, the grille plate 121 can be automatically rotated from the diversion position state to the anti-backflow position state under the action of the external negative pressure, thereby reducing the air leakage caused by the external negative pressure at the first vent 112, and maintaining a stable anti-backflow state under the action of the external negative pressure. When the external negative pressure is small, driven by the elastic member 131 that accumulates elastic potential energy, the grille plate 121 can be automatically rotated and switched from the anti-backflow state to the diversion state, and maintain a stable diversion state, thereby realizing the automatic adjustment of the grille plate 121.

[0093] In some embodiments, when the grille plate 121 is in the backflow prevention state, the wind pressure acting on the grille plate 121 due to the pressure difference between the first wind pressure and the second wind pressure is greater than or equal to the elastic force of the elastic member 131 .

[0094] That is, the elastic member 131 with different elastic coefficients is adjusted to adapt to the force of different wind pressures.

[0095] It should be noted that, in the embodiment of the present invention, a grid plate 121 can be rotatably connected to the air duct member 11 through one or more rotating shafts 1221. A grid plate 121 can also be connected and installed around the corresponding rotating shaft 1221 through one or more elastic members 131, so that the grid plate 121 can spontaneously switch and rotate between the diversion state and the backflow prevention state under the action of negative pressure.

[0096] In some other embodiments, the elastic member 131 may also be configured as a compression spring. That is, when the grid plate 121 is in the flow-guiding state, the compression spring is in the initial stress-free state or slightly compressed state. When the grid plate 121 rotates to the backflow prevention state, the elastic member 131 is in a compressed state and accumulates elastic potential energy, and under the action of negative pressure, the grid plate 121 maintains a stable backflow prevention state. When the negative pressure decreases, the compression spring that accumulates the elastic potential energy drives the grid plate 121 to rotate to the flow-guiding state, and reduces the elastic potential energy.

[0097] It should be noted that, during the process of the grid plate 121 switching and moving spontaneously between the backflow prevention state and the flow diversion state by the force of the elastic member 131, the force of the elastic member 131 acting on the grid plate 121 is proportional to the stroke of the elastic member 131 being stretched or compressed. Taking the elastic member 131 as an example, since the side of the spring away from the rotating shaft 1221 is stretched during the stretching process and the side of the spring close to the rotating shaft 1221 is compressed during the compression process, the elastic coefficient of the elastic member 131 can be determined according to actual applications.

[0098] In some other embodiments, such as Figure 7 As shown, when the guide member 122 includes the rotating shaft 1221, the driving mechanism 13 also includes a torsion spring 132, which is plugged and installed with the rotating shaft 1221 along the axial direction of the rotating shaft 1221, one end of the torsion spring 132 contacts the grille plate 121, and the other end of the torsion spring 132 contacts the air duct member 11. When the grille plate 121 is in the anti-backflow state (i.e. Figure 7 When the grid plate 121 is in the flow-guiding state (i.e., the dotted line position in the figure), the torsion spring 132 accumulates elastic potential energy. Figure 7 When the torsion spring 132 reaches the realization position in the torsion spring 132, the elastic potential energy of the torsion spring 132 is reduced.

[0099] For example, in the process of the grid plate 121 rotating and switching from the diversion state to the backflow prevention state, the windward surface of the grid plate 121 is the outer surface. Figure 7 As shown, one end of the torsion spring 132 is arranged in contact with the outer side surface of the grille plate 121, and the other end of the torsion spring 132 is arranged in contact with the air duct member 11 or the first stopper 1223. When the grille plate 121 rotates to the backflow prevention state, the torsion spring 132 is in a compressed state and accumulates elastic potential energy. When the external negative pressure is small, the compressed torsion spring 132 releases energy to drive the grille plate 121 to rotate to the diversion state. At this time, the elastic potential energy of the torsion spring 132 is reduced or there is no elastic potential energy, and the grille plate 121 can also achieve the self-regulation switching between the diversion state and the backflow prevention state.

[0100] It should be noted that the stiffness coefficient k of the torsion spring 132 can be determined according to the specifications, model and material used of the torsion spring 132. In the embodiment of the present invention, the angle of rotation of the torsion spring 132 between the diversion state and the backflow prevention state is θ=180°. It is defined that the force of the torsion spring 132 on the grid plate 121 in the diversion state is zero, then the elastic force of the torsion spring 132 acting on the grid plate 121 is F1=k×θ×L / 2. Among them, L is the length dimension of the grid plate 121 along the Y direction in the diversion state, θ is the rotation angle of the grid plate 121 compared to the diversion state, and the maximum angle is π.

[0101] In addition, the driving mechanism 13 can also actively switch the position state of the grid plate 121 between the flow guiding state and the backflow preventing state.

[0102] In some embodiments, Figure 8 As shown, the driving mechanism 13 also includes a power member 133 and an adjustment module 134. Fig. 9 and Fig.10 One end of the power member 133 is connected to the air duct member 11, and the other end of the power member 133 is connected to the grille plate 121. The adjustment module 134 is connected to the power member 133, and the adjustment module 134 is configured as follows:

[0103] When the first wind pressure is higher than the second wind pressure preset pressure value, the regulating module 134 controls the power member 133 to drive the grille plate 121 to move from the diversion state to the backflow prevention state. Otherwise, the regulating module 134 controls the power member 133 to keep the grille plate 121 in the diversion state.

[0104] That is, through the coordinated arrangement of the adjustment module 134 and the power member 133, the grille plate 121 can be automatically controlled, and the position state of the grille plate 121 can be flexibly switched between the diversion state and the backflow prevention state according to preset conditions. Actively switching and adjusting the position state of the grille plate 121 through the driving mechanism 13 is conducive to improving the stability of the backflow prevention air duct device 10.

[0105] like Figure 8 As shown, the power member 133 includes a driving motor 1331, and the regulating module 134 is controlled and connected to the driving motor 1331. Fig. 9 The output end of the driving motor 1331 is used to drive the grid plate 121 to move and switch between the diversion state and the backflow prevention state.

[0106] Taking the example that the grille plate 121 is configured to be rotatably connected to the air duct member 11, a drive motor 1331 can be set corresponding to a grille plate 121, and the output end of the drive motor 1331 is connected to a position of the grille plate 121 close to the rotating shaft 1221, so that the drive motor 1331 can directly drive the grille plate 121 to switch and rotate between the diversion state and the backflow prevention state.

[0107] Alternatively, a transmission gear can be connected to the grille plate 121 near the rotating shaft 1221, and the transmission gears of multiple grille plates 121 are connected to the driving gear of the same drive motor 1331 through a chain or a transmission belt, so that the drive motor 1331 can drive the multiple grille plates 121 to switch and rotate between the diversion position state and the backflow prevention position state.

[0108] Alternatively, by cooperating with the gear and the rack, the grid plate 121 can also be driven by the driving motor 1331 to slide and switch between the diversion state and the backflow prevention state along the Y direction, which is not limited to this.

[0109] The driving motor 1331 may be a DC motor, an AC motor, a stepping motor or a servo motor, which is not limited.

[0110] In some embodiments, reference Figure 8 and Fig.10 The power member 133 further includes a driving connecting rod 1332 and a driving cylinder 1333. One end of the driving connecting rod 1332 is connected to the air duct member 11, and the other end of the driving connecting rod 1332 is connected to the grille plate 121. The driving cylinder 1333 is connected between the driving connecting rods 1332. Or the driving cylinder 1333 is connected between the driving connecting rod 1332 and the air duct member 11. The adjustment module 134 is control-connected to the driving cylinder 1333 to control the grille plate 121 to move and switch between the diversion state and the backflow prevention state.

[0111] In this way, the drive cylinder 1333 can be controlled to extend or shorten through the adjustment module 134, and the drive connecting rod 1332 can be used to drive the grille plate 121 to rotate between the diversion state and the backflow prevention state, or to slide between the diversion state and the backflow prevention state. The drive cylinder 1333 and the drive connecting rod 1332 can be flexibly configured and installed according to different requirements of the grille plate 121, which is flexible and convenient.

[0112] It should be noted that, in an embodiment of the present invention, when the adjustment module 134 adjusts the position state of the switching grille plate 121 according to different preset conditions, the adjustment module 134 can obtain the first wind pressure and the second wind pressure through the air pressure sensor and adjust the position state of the grille plate 121 by comparing the difference between the first wind pressure and the second wind pressure with the preset air pressure value.

[0113] Alternatively, the regulating module 134 may also determine the values ​​of the first air pressure and the second air pressure according to the different rotation speeds of the power fan, and calculate the difference between the two and the preset air pressure value to adjust the position state of the grid plate 121, which is not limited to this.

[0114] On the other hand, an embodiment of the present invention further provides a computer device, such as Fig.11 and Fig.12 As shown, the computer device 100 includes the anti-backflow duct device 10 in the above aspect, a chassis 20, a power supply module 30 and a chassis fan 40.

[0115] like Fig.11 and Fig.12 As shown, a housing chamber 21 is provided in the chassis 20, and an air outlet 22 is provided at one end of the housing chamber 21 along the first linear direction. The power module 30 is installed in the housing chamber 21 and is arranged near the air outlet 22 along the first linear direction (i.e., the Y direction). Along the first linear direction, the end of the power module 30 away from the air outlet 22 is the air inlet end, and the air inlet end is arranged in conduction with the second vent 113. A module fan 31 is provided in the power module 30 to drive air to flow into the power module 30 through the air duct member 11 along the first linear direction. In the housing chamber 21, along the first linear direction, a chassis fan 40 is arranged near the air inlet end of the power module 30 to drive air to flow through the chassis fan 40 along the first linear direction. The chassis fan 40 is arranged on one side of the power module 30 along the second linear direction, and the second linear direction is arranged perpendicular to the first linear direction.

[0116] That is, by setting the anti-backflow air duct device 10, the position state of the grille plate 121 can be flexibly switched between the diversion position state and the anti-backflow position state in the chassis 20 of the computer device 100. When the speed of the chassis fan 40 increases rapidly, the grille plate 121 is switched to the anti-backflow state to prevent the leakage of air on the air inlet side of the power module 30, thereby ensuring that there is sufficient air inside the power module 30 for heat dissipation and cooling. When the speed of the chassis fan 40 decreases, the grille plate 121 automatically returns to the diversion state, which will not affect the heat dissipation effect of the system motherboard and the power module.

[0117] Furthermore, since the computer device 100 is a structural solution corresponding to the anti-backflow duct device 10 in the above aspect, the computer device 100 has all the beneficial effects of the anti-backflow duct device 10, which will not be described in detail here.

[0118] In some embodiments, Fig.13 As shown, the computer device 100 further includes a main control module 50, which is connected to at least the chassis fan 40 and the module fan 31. The main control module 50 is configured as follows:

[0119] When the internal temperature of the chassis 20 is less than or equal to the preset temperature, the main control module 50 adjusts the rotation speed of the chassis fan 40 and the rotation speed of the module fan 31 so that the wind pressure difference between the air inlet side of the chassis fan 40 and the first vent 112 is less than the preset wind pressure value.

[0120] For example, the main control module 50 may be a component of a baseboard management controller. When adjusting the speed of the chassis fan 40 and the module fan 31, the main control module 50 will detect in advance. Fig.11 and Fig.12 When the current temperature of the system mainboard 60 and the power board 32 is less than or equal to the preset temperature, the main control module 50 adjusts the chassis fan 40 and the module fan 31 so that the second wind pressure and the second wind pressure on the air inlet side of the two are approximately equal, or have a small wind pressure difference, so as to maintain stable heat dissipation of the system mainboard 60 and the power board 32.

[0121] Alternatively, when the temperature at the system mainboard 60 is high, the main control module 50 detects the current temperature at the power board 32. If the temperature of the power board 32 is greater than the preset temperature, the speeds of the chassis fan 40 and the module fan 31 are increased synchronously to dissipate heat synchronously and quickly. If the temperature of the power board 32 is less than or equal to the preset temperature, only the speed of the chassis fan 40 is increased to dissipate heat quickly from the system mainboard 60. In this process, if the first wind pressure is higher than the preset value of the second wind pressure, the grille plate 121 can rotate spontaneously to the anti-backflow state under the action of the wind pressure, or the grille plate 121 can be moved to the anti-backflow state through the adjustment module 134.

[0122] Since the wind pressure of the fan is related to the air volume and speed, the wind pressure of different fans is different. When the chassis fan 40 is running normally, according to the heat dissipation control strategy, the main control module 50 controls the speed of the chassis fan 40 to S. According to the model of the chassis fan 40, Fig.14 The wind pressure value A corresponding to the corresponding speed is found on the PQ curve shown. Similarly, the main control module 50 sets the speed of the module fan 31 to S1, and obtains the wind pressure value B corresponding to the speed according to the model of the main control module 50.

[0123] Under normal working conditions, there is a coefficient relationship n between the wind pressure A of the chassis fan 40 and the wind pressure B of the module fan 31, and A and B can be approximated to satisfy the linear function A=n*B+z. At this time, considering the different structural positions and air duct paths of the chassis fan 40 and the module fan 31, the coefficient n and the constant z have different parameters, so that A and B reach a balance state and no backflow occurs. And the grille plate 121 is not stressed and is in Fig.11 The diversion status shown.

[0124] In order to ensure that the speed of the module fan 31 is adjusted only according to the temperature state of the power module 30 itself, and is not affected by other external factors (here mainly the speed of the chassis fan 40). Since the power consumption of the power module 30 itself remains unchanged, it means that the temperature of the internal power board 32 of the power module 30 is constant. In addition, the internal temperature of the power module 30 is also related to the temperature of the air inlet. When the ambient temperature is constant, it can be regarded as the air inlet temperature is constant.

[0125] Taking the air temperature at the air inlet as 25° as an example, when the temperature of a component inside the system mainboard 60 exceeds the preset temperature, the chassis fan 40 increases its speed, and the main control module 50 sets the speed of the chassis fan 40 to S'. Fig.14 The wind pressure value corresponding to the speed at this time on the PQ curve of the chassis fan 40 is A'. When the speed of the chassis fan 40 is increased from S to the dangerous value S', the speed of the module fan 31 remains unchanged.

[0126] When the wind pressure value of the chassis fan 40 changes from A to A', the second wind pressure value of the chassis fan 40 on the air inlet side will be greatly reduced, so that the first wind pressure at the first vent 112 is higher than the second wind pressure preset pressure value. The resulting wind pressure difference will draw air from the original return path (i.e., the first vent 112 or the air inlet side of the power module 30). However, due to the setting of the grille plate 121, the wind pressure difference is applied to the grille plate 121, driving the grille plate 121 to rotate counterclockwise to Fig.12 Backflow prevention status shown.

[0127] Taking the case where the rotating grille plate 121 switches spontaneously between the diversion state and the backflow prevention state only through the elastic member 131 or the torsion spring 132 as an example, in the above process, the pressure difference force applied by the wind pressure difference on the grille plate 121 is F2=△P×S. Among them, △P can be regarded as the difference between the first wind pressure and the second wind pressure, which is kept stable by the second wind pressure, that is, the change from A to A' through the chassis fan 40 is the difference between the first wind pressure and the second wind pressure. S represents the area of ​​each grille plate 121.

[0128] Based on this, the grid plate 121 is taken as an example of spontaneously switching and rotating between the diversion state and the backflow prevention state through the torsion spring 132. In this process, the pressure difference force F2 is greater than the elastic force F1 of the torsion spring, so that the grid plate 121 spontaneously rotates from the diversion state to the backflow prevention state, and remains stable in the backflow prevention state under the action of the first limiter 1223, so as to prevent leakage from the air inlet side of the power module 30 to the air inlet side of the chassis fan 40. When the grid plate 121 rotates to the backflow prevention state, its rotation angle θ is the largest and is π.

[0129] Correspondingly, when the pressure difference force is smaller than the elastic force of the torsion spring, the grille plate 121 will spontaneously rotate from the anti-return state to the flow diversion state under the action of the torsion spring 132, and remain stable in the flow diversion state under the action of the second limit member 1224, which is beneficial to increase the air flow on the air inlet side of the power module 30.

[0130] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A backflow prevention air duct device, It is characterized in that include: An air duct member having an air duct cavity and a first vent and a second vent sequentially connected to two ends of the air duct cavity; and a guide assembly, the guide assembly comprising a grille plate and a guide member, the grille plate is located at one end of the air duct cavity close to the first vent, and the grille plate is connected to the air duct member through the guide member; The flow guiding component has a flow guiding state and a backflow preventing state; When the air guide assembly is in the air guide state, the grille plate is located in the air duct cavity; When the air guide assembly is in the backflow prevention state, the grille plate is at least partially moved outside the air duct cavity through the first vent to increase the air guide length of the air duct cavity.

2. The backflow prevention duct device according to claim 1, It is characterized in that The anti-backflow air duct device also includes: A driving mechanism, wherein the driving mechanism is connected to the air duct member and / or the guide member, and one end of the driving mechanism is connected to the grille plate; Taking the plane where the first vent is located as a reference plane, within the reference plane, define the wind pressure at the first vent as a first wind pressure, and the wind pressure outside the first vent as a second wind pressure; The drive mechanism is configured as follows: When the first wind pressure is higher than the second wind pressure preset pressure value, the driving mechanism drives the grille plate to move from the flow guiding state to the backflow preventing state; Otherwise, the driving mechanism drives the grid plate to be in the flow guiding state.

3. The backflow prevention duct device according to claim 2, It is characterized in that The guide member comprises a rotating shaft, and the grille plate is rotatably connected to the air duct member via the rotating shaft, so that the grille plate can be rotatably adjusted between the flow guiding state and the backflow preventing state.

4. The backflow prevention air duct device according to claim 3, It is characterized in that The guide member comprises: a first stopper, the first stopper being connected to the air duct member, and when the grille plate rotates from the flow guiding state to the backflow preventing state, the first stopper contacts the grille plate to prevent the grille plate from further rotating; And / or, a second limit member, the second limit member is connected to the air duct member, when the grille plate rotates from the anti-backflow state to the diversion state, the second limit member contacts the grille plate to prevent the grille plate from continuing to rotate.

5. The backflow prevention duct device according to claim 2, It is characterized in that The driving mechanism includes an elastic member; One end of the elastic member is connected to the guide member and / or the air duct member, and the other end of the elastic member is connected to the grille plate; When the grid plate is in the backflow prevention state, the elastic member is in a stretched state or a compressed state and accumulates elastic potential energy; When the grid plate is in the flow-guiding state, the elastic potential energy of the elastic member decreases.

6. The backflow prevention duct device according to claim 5, It is characterized in that When the grille plate is in a backflow prevention state, the wind pressure acting on the grille plate by the pressure difference between the first wind pressure and the second wind pressure is greater than or equal to the elastic force of the elastic member.

7. The backflow prevention air duct device according to claim 2, It is characterized in that In the case where the guide member includes a rotating shaft, the driving mechanism further includes: A torsion spring, wherein the torsion spring is plug-connected and installed with the rotating shaft along the axial direction of the rotating shaft, one end of the torsion spring contacts the grille plate, and the other end of the torsion spring contacts the air duct member; When the grid plate is in a backflow prevention state, the torsion spring accumulates elastic potential energy; When the grid plate is in the flow-guiding state, the elastic potential energy of the torsion spring is reduced.

8. The backflow prevention air duct device according to claim 7, It is characterized in that The elastic force F1 = k×θ×L / 2 of the torsion spring acting on the grid plate; The pressure difference between the first wind pressure and the second wind pressure acts on the grid plate with a pressure difference force F2=△P×S; When the pressure difference force is greater than the elastic force, that is, F2 ≥ F1, the grid plate is rotated from the flow guiding state to the backflow preventing state; Wherein, k is the stiffness coefficient of the torsion spring, θ is the rotation angle of the grille plate compared to the diversion state, S is the area of ​​the grille plate, and ΔP is the difference between the first wind pressure and the second wind pressure.

9. The backflow prevention air duct device according to any one of claims 1 to 8, It is characterized in that The air duct cavity is extended along a first straight line direction at least at the first vent; There are multiple grille plates, and one grille plate is connected to the air duct member via at least one guide member; When the flow guide assembly is in the flow guide state and / or the backflow prevention state, a plurality of the grid plates are spaced apart and distributed along the second straight line direction; The first straight line direction is arranged perpendicular to the second straight line direction.

10. The backflow prevention air duct device according to claim 9, It is characterized in that When the flow guiding component is in the flow guiding state and / or the backflow preventing state; The length dimension of the grid plate along the first straight line direction is smaller than the spacing dimension between two adjacent grid plates along the second straight line direction.

11. The backflow prevention air duct device according to any one of claims 2 to 7, It is characterized in that The driving mechanism further comprises: A power member, one end of which is connected to the air duct member, and the other end of which is connected to the grille plate; and an adjusting module, wherein the adjusting module is connected to the power member and is configured as follows: When the first wind pressure is higher than the second wind pressure preset pressure value, the regulating module controls the power member to drive the grille plate to move from the diversion state to the backflow prevention state; Otherwise, the regulating module controls the power member to place the grille plate in the flow guiding state.

12. The backflow prevention air duct device according to claim 11, It is characterized in that The power part includes a driving motor, and the regulating module is control-connected to the driving motor; The output end of the driving motor is used to drive the grid plate to move and switch between the diversion state and the backflow prevention state.

13. The backflow prevention air duct device according to claim 11, It is characterized in that The power member also includes: A driving connecting rod, one end of which is connected to the air duct member, and the other end of which is connected to the grille plate; and a driving cylinder body, wherein the driving cylinder body is connected between the driving connecting rods, or the driving cylinder body is connected between the driving connecting rods and the air duct member; the regulating module is control-connected with the driving cylinder body, and is used to control the movement and switching of the grille plate between the diversion state and the backflow prevention state.

14. A computer device, It is characterized in that include: A chassis, wherein a receiving cavity is provided in the chassis, and an air outlet is provided at one end of the receiving cavity along a first straight line direction; The anti-backflow air duct device according to any one of claims 1 to 13; A power module, the power module is installed in the accommodating cavity and is arranged near the air outlet along the first straight line direction; along the first straight line direction, the end of the power module away from the air outlet is an air inlet end, the air inlet end is connected to the second air outlet, and a module fan is arranged in the power module to drive air to flow into the power module through the air duct along the first straight line direction; And a chassis fan, within the accommodating cavity, along the first straight line direction, the chassis fan is arranged close to the air inlet end of the power supply module to drive air to flow through the chassis fan along the first straight line direction; and the chassis fan is arranged on one side of the power supply module along the second straight line direction, and the second straight line direction is arranged perpendicular to the first straight line direction.

15. The computer device according to claim 14, It is characterized in that The computer device also includes: A main control module, the main control module is connected to at least the chassis fan and the module fan; the main control module is configured as follows: When the internal temperature of the chassis is less than or equal to a preset temperature, the main control module adjusts the rotation speed of the chassis fan and the rotation speed of the module fan so that the wind pressure difference between the air inlet side of the chassis fan and the first vent is less than a preset wind pressure value.

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