CN106055051B - A kind of device and fan wall of anti-return - Google Patents
A kind of device and fan wall of anti-return Download PDFInfo
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- CN106055051B CN106055051B CN201610483836.0A CN201610483836A CN106055051B CN 106055051 B CN106055051 B CN 106055051B CN 201610483836 A CN201610483836 A CN 201610483836A CN 106055051 B CN106055051 B CN 106055051B
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- 230000002265 prevention Effects 0.000 claims description 119
- 230000005389 magnetism Effects 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
- F04D29/524—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps shiftable members for obturating part of the flow path
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- Engineering & Computer Science (AREA)
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- Theoretical Computer Science (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of device of anti-return and fan walls, comprising: fan, anti-return component, fixation member；Wherein, when the fan is in first state and gas is discharged towards first direction, the anti-return component is fixed at first position by the fixation member；When the anti-return component is at the first position, the anti-return component does not block the fan discharge gas；When the fan is in the second state without supporting for gas to be discharged towards first direction, the fixation member discharges the anti-return component and the anti-return component is made to be in the second place；At the second place, the anti-return component blocks the fan and gas is hindered to flow to the fan towards second direction the anti-return component.
Description
Technical Field
The invention relates to the technical field of intelligent household appliances, in particular to a backflow prevention device and a fan wall.
Background
A fan wall is generally disposed in an electronic device such as a rack server, and the fan wall is composed of a plurality of fans arranged in a row. When the fan wall normally works, higher air pressure is generated on one side of the air outlet of the fan wall to push airflow to flow forwards, so that heat dissipation is performed on the mainboard.
The air inlet and the air outlet of the fan in the fan wall have certain air pressure difference, when one or more fans in the fan wall fail to work, airflow can flow back at the failed fan due to the air pressure difference, air leakage of the whole fan wall is caused, and the heat dissipation effect is poor.
In the prior art, a method for solving the problem of air leakage of a fan wall is to install shutters at air outlets of fans. When the fan works normally, the louver is opened by 90 degrees; when the fan fails, the louvers close, blocking the backflow of air. However, although the louver may prevent the air from flowing back when the fan fails, it may cause severe wind resistance to the fan when the fan is normally operated, resulting in wind flow loss and increased power consumption of the fan.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present invention provide a backflow prevention device and a fan wall.
The backflow prevention device provided by the embodiment of the invention comprises: a fan, a backflow prevention part, and a fixing part; wherein,
the fixing member fixes the backflow preventing member at a first position when the fan is in a first state to discharge the gas in a first direction; when the backflow preventing component is at the first position, the backflow preventing component does not shield the fan exhaust gas;
when the fan is in the second state and does not support the discharge of the gas in the first direction, the fixing part releases the backflow preventing part to enable the backflow preventing part to be in the second position; when the backflow preventing component is at the second position, the backflow preventing component shields the fan and blocks air from flowing to the fan in a second direction.
In the embodiment of the invention, the backflow preventing component is of a sheet structure, and the area of the sheet structure is adaptive to the area of the fan blade of the fan;
when the backflow preventing component is at the second position, the sheet structure covers the fan surface of the fan, so that air cannot flow to the fan in the second direction.
In the embodiment of the invention, the first end of the backflow preventing component is rotationally connected with the first end of the fan; when the second end of the backflow prevention component rotates around the first end of the backflow prevention component, the backflow prevention component can be switched between the first position and the second position.
In an embodiment of the present invention, when the backflow prevention member is at the first position, a line connecting the second end of the backflow prevention portion and the first end of the backflow prevention member is perpendicular to the fan, and the position of the second end of the backflow prevention member is fixed by the fixing member.
In the embodiment of the invention, when the fan is in the first state and exhausts the gas towards the first direction, the gas pushes the second end of the backflow prevention component to rotate around the first end of the backflow prevention component, so that the backflow prevention component moves to the first position; when the backflow prevention part moves to the first position, the fixing part fixes the second end of the backflow prevention part and keeps fixed.
In the embodiment of the invention, when the fan is in the second state and does not support the discharge of the gas in the first direction, the fixing part releases the second end of the backflow preventing part, so that the second end of the backflow preventing part falls back to the second end position of the fixing part; when the second end of the backflow prevention component falls back to the second end position of the fixing component, the backflow prevention component blocks the air from flowing to the fan in the second direction.
In the embodiment of the invention, the second end of the backflow prevention component is provided with a first magnetizer; the fixing part comprises a second magnetizer and a coil wound on the second magnetizer;
when the fan is in a first state, the coil is electrified, so that the second magnetizer generates magnetism to attract the first magnetizer at the second end of the backflow-preventing component; when the fan is in the second state, the coil is powered off to enable the second magnetizer to release magnetism, and the second end of the backflow preventing component falls back to the second end position of the fixing component.
The fan wall provided by the embodiment of the invention comprises more than two fan devices, wherein each fan device is provided with: a fan, a backflow prevention part, and a fixing part; wherein,
the fixing member fixes the backflow preventing member at a first position when the fan is in a first state to discharge the gas in a first direction; when the backflow preventing component is at the first position, the backflow preventing component does not shield the fan exhaust gas;
when the fan is in the second state and does not support the discharge of the gas in the first direction, the fixing part releases the backflow preventing part to enable the backflow preventing part to be in the second position; when the backflow preventing component is at the second position, the backflow preventing component shields the fan and blocks air from flowing to the fan in a second direction.
In the embodiment of the invention, the backflow preventing component is of a sheet structure, and the area of the sheet structure is adaptive to the area of the fan blade of the fan;
when the backflow preventing component is at the second position, the sheet structure covers the fan surface of the fan, so that air cannot flow to the fan in the second direction.
In the embodiment of the invention, the first end of the backflow preventing component is rotationally connected with the first end of the fan; when the second end of the backflow prevention component rotates around the first end of the backflow prevention component, the backflow prevention component can be switched between the first position and the second position.
In an embodiment of the present invention, when the backflow prevention member is at the first position, a line connecting the second end of the backflow prevention portion and the first end of the backflow prevention member is perpendicular to the fan, and the position of the second end of the backflow prevention member is fixed by the fixing member.
In the embodiment of the invention, when the fan is in the first state and exhausts the gas towards the first direction, the gas pushes the second end of the backflow prevention component to rotate around the first end of the backflow prevention component, so that the backflow prevention component moves to the first position; when the backflow prevention part moves to the first position, the fixing part fixes the second end of the backflow prevention part and keeps fixed.
In the embodiment of the invention, when the fan is in the second state and does not support the discharge of the gas in the first direction, the fixing part releases the second end of the backflow preventing part, so that the second end of the backflow preventing part falls back to the second end position of the fixing part; when the second end of the backflow prevention component falls back to the second end position of the fixing component, the backflow prevention component blocks the air from flowing to the fan in the second direction.
In the embodiment of the invention, the second end of the backflow prevention component is provided with a first magnetizer; the fixing part comprises a second magnetizer and a coil wound on the second magnetizer;
when the fan is in a first state, the coil is electrified, so that the second magnetizer generates magnetism to attract the first magnetizer at the second end of the backflow-preventing component; when the fan is in the second state, the coil is powered off to enable the second magnetizer to release magnetism, and the second end of the backflow preventing component falls back to the second end position of the fixing component.
In the technical solution of the embodiment of the present invention, the apparatus includes: a fan, a backflow prevention part, and a fixing part; wherein the fixing member fixes the backflow preventing member at a first position when the fan is in a first state to discharge the gas in a first direction; when the backflow preventing component is at the first position, the backflow preventing component does not shield the fan exhaust gas; when the fan is in the second state and does not support the discharge of the gas in the first direction, the fixing part releases the backflow preventing part to enable the backflow preventing part to be in the second position; when the backflow preventing component is at the second position, the backflow preventing component shields the fan and blocks air from flowing to the fan in a second direction. So, when the fan broke down, the backward flow of air has been blockked to the anti-return parts, has ensured the fan and has not leaked out to, when the fan normally worked, the anti-return parts do not shelter from fan exhaust gas, and the anti-return parts can not bring the windage for the fan, thereby can not increase fan power consumption yet.
Drawings
FIG. 1 is a schematic view of a fan wall according to an embodiment of the present invention;
FIG. 2 is a schematic view of a fan louver;
FIG. 3 is a first schematic view of a backflow prevention device according to an embodiment of the present invention;
FIG. 4 is a second schematic view of a backflow prevention device according to an embodiment of the present invention;
FIG. 5 is a third schematic view of a backflow prevention device according to an embodiment of the present invention;
FIG. 6 is a fourth schematic view of a backflow prevention device in accordance with an embodiment of the present invention;
fig. 7 is a fifth schematic view of a backflow prevention device according to an embodiment of the present invention.
Detailed Description
So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.
Referring to fig. 1, fig. 1 is a schematic view of a fan wall. A Fan wall is generally disposed in an electronic device such as a rack server, and as shown in fig. 1, the Fan wall is composed of a plurality of fans (Fan) arranged in a row. When the fan wall normally works, higher air pressure is generated at one side of the air outlet of the fan wall to push airflow to flow forwards, so that heat dissipation is performed on the main board (Mainboard). In the server shown in fig. 1, there is a Power Supply Unit (PSU), and the PSU of the server is a Power Supply Unit component of the server. The server shown in fig. 1 further includes a Hard Disk Drive (HDD), which is a memory.
Referring to the left drawing in fig. 1, all fans in the fan wall operate normally, and a certain air pressure difference exists between the air inlet and the air outlet of the fan in the fan wall, so that a higher air pressure is generated at one side of the air outlet of the fan wall to push the air flow to flow forward, thereby dissipating heat of the main board.
Referring to the right diagram of fig. 1, when a fan fails, due to the existence of air pressure difference, airflow may generate backflow at the failed fan, which causes air leakage of the whole fan wall and deteriorates the heat dissipation effect.
Therefore, the method for solving the air leakage of the fan wall is to install shutters at the air outlets of the fans. Referring to fig. 2, fig. 2 is a schematic view of a louver of the fan, as shown in the right view of fig. 2, when the fan is normally operated, the louver is opened by 90 degrees; as shown in the left drawing of fig. 2, when the fan is stopped, the louver is closed, blocking the backflow of air. However, although the louver may prevent the air from flowing back when the fan fails, it may cause severe wind resistance to the fan when the fan is normally operated, resulting in wind flow loss and increased power consumption of the fan.
Based on this, the embodiment of the present invention provides a backflow prevention device, which is shown in fig. 3 and includes: a fan 31, a backflow prevention member 32, a fixing member 33; wherein,
when the fan 31 is in the first state to discharge the gas in the first direction, the fixing member 33 fixes the backflow preventing member 32 at the first position; when the backflow preventing member 32 is in the first position, the backflow preventing member 32 does not block the exhaust gas of the fan 31.
Here, the first state refers to a normal operation state, and when the fan 31 is in the normal operation state, the fan can discharge the gas in the first direction. Specifically, a set of blades of the fan 31 is fixed on the same rotor, and the set of blades rotates along with the rotor to form a wind flow, and the wind flow has a certain direction.
When the fan 31 is normally operated, the fixing member 33 fixes the backflow preventing member 32 at the first position, as shown in the c position. Thus, the entire backflow preventing member 32 does not overlap the fan 31, and does not block the air discharged from the fan 31. In one embodiment, the entire backflow prevention device 32 is vertically disposed to the fan 31 so that the gas discharged from the fan 31 is not blocked by the backflow prevention device 32.
When the fan 31 is in the second state without supporting the discharge of the gas in the first direction, the fixing member 33 releases the backflow preventing member 32 to place the backflow preventing member 32 at the second position; when the backflow preventing member 32 is in the second position, the backflow preventing member 32 blocks the fan 31 to block the air from flowing toward the fan 31 in the second direction.
Here, the second state refers to a failure or failure state in which the fan 31 cannot discharge the gas in the first direction when the fan is in the failure state. At this time, the fixing member 33 releases the backflow preventing member 32 so that the backflow preventing member 32 is at the second position, as shown in the a position. Thus, the entire backflow preventing member 32 blocks the fan 31 to block the flow of the gas toward the fan 31 in the second direction. Here, the second direction is an opposite direction to the first direction.
In one embodiment, the backflow prevention member 32 has a sheet structure, and the area of the sheet structure is adapted to the area of the fan blade of the fan 31;
when the backflow-preventing component 32 is in the second position, the sheet-shaped structure covers the fan surface of the fan 31, so that air cannot flow to the fan 31 in the second direction.
In one embodiment, a first end of the backflow prevention component 32 is rotatably connected to a first end of the fan 31; when the second end of the backflow prevention member 32 rotates around the first end of the backflow prevention member 32, the backflow prevention member 32 can be switched between the first position and the second position.
As shown in fig. 4, the backflow prevention member 32 has a rectangular sheet structure, and the fan surface formed by the entire blades of the fan 31 also has a rectangular structure. The first end of the backflow prevention component 32 is rotatably connected to the first end of the fan 31, where the second end of the backflow prevention component 32 rotates around the first end of the backflow prevention component 32, the first position is an a position as shown in the figure, and the second position is a c position as shown in the figure, and the second end of the backflow prevention component 32 rotates between the a position and the c position, for example, moves from the a position to the b position and then moves to the c position. Or, the position c is moved to the position b and then moved to the position a.
In one embodiment, referring to fig. 5, when the backflow preventing member 32 is at the first position, a line connecting the second end of the backflow preventing portion and the first end of the backflow preventing member 32 is perpendicular to the fan 31, and the position of the second end of the backflow preventing member 32 is fixed by the fixing member 33.
In one embodiment, referring to fig. 5, when the fan 31 is in the first state to exhaust the gas to the first position, the gas pushes the second end of the backflow prevention part 32 to rotate around the first end of the backflow prevention part 32, so that the backflow prevention part 32 moves to the first position; when the backflow preventing member 32 is moved to the first position, the second end of the backflow preventing member 32 fixed by the fixing member 33 remains fixed.
In one embodiment, referring to fig. 6, when the fan 31 is in the second state without supporting the discharge of the gas in the first direction, the fixing member 33 releases the second end of the backflow preventing member 32, and the second end of the backflow preventing member 32 falls back to the second end position of the fixing member 33; when the second end of the backflow preventing member 32 falls back to the second end position of the fixing member 33, the backflow preventing member 32 blocks the flow of the gas toward the fan 31 in the second direction.
In one embodiment, referring to fig. 7, the second end of the backflow prevention part 32 has a first magnetic conductor; the fixing part 33 includes a second magnetic conductor and a coil wound around the second magnetic conductor;
when the fan 31 is in the first state, the coil is energized to make the second magnetizer generate magnetic attraction to the first magnetizer at the second end of the backflow-preventing component 32; when the fan 31 is in the second state, the coil is de-energized to make the second magnetizer release magnetism, and the second end of the backflow preventing component 32 falls back to the second end position of the fixing component 33.
In the technical scheme of the embodiment of the invention, when the fan works normally, the electromagnet in the fixing part 33 in fig. 7 is electrified, and the backflow preventing part 32 is adsorbed to the horizontal position due to the magnetic force, so that the air flow can flow normally, the resistance of the traditional shutter design to the fan is avoided, and the power consumption of the fan is saved.
In the technical scheme of the embodiment of the invention, when the fan fails, the electromagnet in the fixed part 33 in fig. 7 is powered off, the electromagnetic force disappears, and the backflow preventing part 32 is adjusted to the vertical position due to the self gravity, so that the purpose of preventing backflow is achieved.
An embodiment of the present invention further provides a fan wall, as shown in fig. 1, the fan wall includes two or more fan devices, where each fan device includes: a fan, a backflow prevention part, and a fixing part; wherein,
the fixing member fixes the backflow preventing member at a first position when the fan is in a first state to discharge the gas in a first direction; when the backflow preventing component is at the first position, the backflow preventing component does not shield the fan exhaust gas;
when the fan is in the second state and does not support the discharge of the gas in the first direction, the fixing part releases the backflow preventing part to enable the backflow preventing part to be in the second position; when the backflow preventing component is at the second position, the backflow preventing component shields the fan and blocks air from flowing to the fan in a second direction.
In the embodiment of the invention, the backflow preventing component is of a sheet structure, and the area of the sheet structure is adaptive to the area of the fan blade of the fan;
when the backflow preventing component is at the second position, the sheet structure covers the fan surface of the fan, so that air cannot flow to the fan in the second direction.
In the embodiment of the invention, the first end of the backflow preventing component is rotationally connected with the first end of the fan; when the second end of the backflow prevention component rotates around the first end of the backflow prevention component, the backflow prevention component can be switched between the first position and the second position.
In an embodiment of the present invention, when the backflow prevention member is at the first position, a line connecting the second end of the backflow prevention portion and the first end of the backflow prevention member is perpendicular to the fan, and the position of the second end of the backflow prevention member is fixed by the fixing member.
In the embodiment of the invention, when the fan is in the first state and exhausts the gas towards the first direction, the gas pushes the second end of the backflow prevention component to rotate around the first end of the backflow prevention component, so that the backflow prevention component moves to the first position; when the backflow prevention part moves to the first position, the fixing part fixes the second end of the backflow prevention part and keeps fixed.
In the embodiment of the invention, when the fan is in the second state and does not support the discharge of the gas in the first direction, the fixing part releases the second end of the backflow preventing part, so that the second end of the backflow preventing part falls back to the second end position of the fixing part; when the second end of the backflow prevention component falls back to the second end position of the fixing component, the backflow prevention component blocks the air from flowing to the fan in the second direction.
In the embodiment of the invention, the second end of the backflow prevention component is provided with a first magnetizer; the fixing part comprises a second magnetizer and a coil wound on the second magnetizer;
when the fan is in a first state, the coil is electrified, so that the second magnetizer generates magnetism to attract the first magnetizer at the second end of the backflow-preventing component; when the fan is in the second state, the coil is powered off to enable the second magnetizer to release magnetism, and the second end of the backflow preventing component falls back to the second end position of the fixing component.
It will be appreciated by those skilled in the art that the function of each fan in the fan wall shown in fig. 1 can be understood with reference to the description relating to the backflow prevention device of the embodiment of the present invention.
The technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (14)
1. A backflow prevention device, comprising: a fan, a backflow prevention part, and a fixing part; wherein,
the fixing member fixes the backflow preventing member at a first position when the fan is in a first state to discharge the gas in a first direction; when the backflow preventing component is at the first position, the backflow preventing component does not shield the fan exhaust gas;
when the fan is in the second state and does not support the discharge of the gas in the first direction, the fixing part releases the backflow preventing part to enable the backflow preventing part to be in the second position; when the backflow preventing component is at the second position, the backflow preventing component shields the fan and blocks air from flowing to the fan in a second direction.
2. The backflow prevention device as claimed in claim 1, wherein the backflow prevention member is a sheet structure, and the area size of the sheet structure is adapted to the area size of the fan blade;
when the backflow preventing component is at the second position, the sheet structure covers the fan surface of the fan, so that air cannot flow to the fan in the second direction.
3. The backflow prevention device of claim 1 wherein a first end of said backflow prevention component is rotatably coupled to a first end of said fan; when the second end of the backflow prevention component rotates around the first end of the backflow prevention component, the backflow prevention component can be switched between the first position and the second position.
4. The backflow prevention device according to claim 3, wherein when the backflow prevention means is at the first position, a line connecting the second end of the backflow prevention means and the first end of the backflow prevention means is perpendicular to the fan, and the position of the second end of the backflow prevention means is fixed by the fixing means.
5. The backflow prevention device of claim 3 wherein when said fan is in said first condition to exhaust gas in a first orientation, said gas urges said second end of said backflow prevention component to rotate about said first end of said backflow prevention component to move said backflow prevention component to said first position; when the backflow prevention part moves to the first position, the fixing part fixes the second end of the backflow prevention part and keeps fixed.
6. The backflow prevention device of claim 3 wherein when said fan is in a second state that does not support the discharge of gas in a first direction, said securing means releases said second end of said backflow prevention means to allow said backflow prevention means to fall back to said second position; when the backflow prevention component falls back to the second position, the backflow prevention component blocks gas from flowing to the fan in a second direction.
7. The backflow prevention device of claim 3 wherein the second end of the backflow prevention component has a first magnetic conductor; the fixing part comprises a second magnetizer and a coil wound on the second magnetizer;
when the fan is in a first state, the coil is electrified, so that the second magnetizer generates magnetism to attract the first magnetizer at the second end of the backflow-preventing component; when the fan is in the second state, the coil is powered off to enable the second magnetizer to release magnetism, and the second end of the backflow preventing component falls back to the second end position of the fixing component.
8. A fan wall, comprising two or more fan units, wherein each fan unit has: a fan, a backflow prevention part, and a fixing part; wherein,
the fixing member fixes the backflow preventing member at a first position when the fan is in a first state to discharge the gas in a first direction; when the backflow preventing component is at the first position, the backflow preventing component does not shield the fan exhaust gas;
when the fan is in the second state and does not support the discharge of the gas in the first direction, the fixing part releases the backflow preventing part to enable the backflow preventing part to be in the second position; when the backflow preventing component is at the second position, the backflow preventing component shields the fan and blocks air from flowing to the fan in a second direction.
9. The fan wall as claimed in claim 8, wherein the backflow preventing member is a sheet structure, and the area of the sheet structure is adapted to the area of the fan blade;
when the backflow preventing component is at the second position, the sheet structure covers the fan surface of the fan, so that air cannot flow to the fan in the second direction.
10. The fan wall of claim 8, wherein the first end of the backflow prevention component is rotatably coupled to the first end of the fan; when the second end of the backflow prevention component rotates around the first end of the backflow prevention component, the backflow prevention component can be switched between the first position and the second position.
11. The fan wall as claimed in claim 10, wherein when the backflow preventing member is at the first position, a line connecting the second end of the backflow preventing member and the first end of the backflow preventing member is perpendicular to the fan, and the position of the second end of the backflow preventing member is fixed by the fixing member.
12. The fan wall as claimed in claim 10, wherein when the fan is in the first state to exhaust the air toward the first position, the air pushes the second end of the backflow prevention member to rotate around the first end of the backflow prevention member, so that the backflow prevention member moves to the first position; when the backflow prevention part moves to the first position, the fixing part fixes the second end of the backflow prevention part and keeps fixed.
13. The fan wall of claim 10, wherein when the fan is in the second state and does not support the discharge of air in the first direction, the securing member releases the second end of the backflow prevention member and causes the backflow prevention member to fall back to the second position; when the backflow prevention component falls back to the second position, the backflow prevention component blocks gas from flowing to the fan in a second direction.
14. The fan wall of claim 10, wherein the second end of the backflow prevention component has a first magnetic conductor; the fixing part comprises a second magnetizer and a coil wound on the second magnetizer;
when the fan is in a first state, the coil is electrified, so that the second magnetizer generates magnetism to attract the first magnetizer at the second end of the backflow-preventing component; when the fan is in the second state, the coil is powered off to enable the second magnetizer to release magnetism, and the second end of the backflow preventing component falls back to the second end position of the fixing component.
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| CN201610483836.0A CN106055051B (en) | 2016-06-27 | 2016-06-27 | A kind of device and fan wall of anti-return |
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| CN201610483836.0A CN106055051B (en) | 2016-06-27 | 2016-06-27 | A kind of device and fan wall of anti-return |
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| US10995771B2 (en) * | 2019-02-27 | 2021-05-04 | Quanta Computer Inc. | Adjustable cooling fan apparatus |
| CN113365481B (en) * | 2021-06-29 | 2023-04-28 | 西安易朴通讯技术有限公司 | Backflow prevention method and device applied to heat dissipation equipment and heat dissipation system |
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| JP2015034674A (en) * | 2013-08-09 | 2015-02-19 | 新日鉄住金エンジニアリング株式会社 | Server rack indoor system |
| CN105700651A (en) * | 2016-02-29 | 2016-06-22 | 联想(北京)有限公司 | Backflow preventing device and heat dissipating device with same |
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| JP2013191602A (en) * | 2012-03-12 | 2013-09-26 | Nec Computertechno Ltd | Cooling structure, shutter opening/closing structure and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201917864U (en) * | 2010-12-31 | 2011-08-03 | 创新科存储技术有限公司 | Fan radiating device |
| JP2015034674A (en) * | 2013-08-09 | 2015-02-19 | 新日鉄住金エンジニアリング株式会社 | Server rack indoor system |
| CN203590649U (en) * | 2013-09-30 | 2014-05-07 | 杭州华三通信技术有限公司 | Back-flow preventer |
| CN105700651A (en) * | 2016-02-29 | 2016-06-22 | 联想(北京)有限公司 | Backflow preventing device and heat dissipating device with same |
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