US20020141879A1 - Hot-pluggable cooling fan system with an interference safety device - Google Patents
Hot-pluggable cooling fan system with an interference safety device Download PDFInfo
- Publication number
- US20020141879A1 US20020141879A1 US09/823,304 US82330401A US2002141879A1 US 20020141879 A1 US20020141879 A1 US 20020141879A1 US 82330401 A US82330401 A US 82330401A US 2002141879 A1 US2002141879 A1 US 2002141879A1
- Authority
- US
- United States
- Prior art keywords
- fan
- chassis
- fan assembly
- hot
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
- F04D29/602—Mounting in cavities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
Definitions
- This invention relates to heat dissipation from electronic components, and more particularly to a hot-pluggable cooling fan system.
- the electronic components and central processing units used in computer systems often generate heat, which could influence the system performance or result in damage to the components.
- one or more cooling fans are used to dissipate heat from the components and maintain a satisfactory operating temperature.
- Many computer systems that employ cooling fans for heat removal are vital to the user, so it is undesirable to eliminate power to the computer system for repair or replacement of a cooling fan.
- One solution to this problem is to use hot-pluggable parts.
- the hot-plugging technique sometimes known as hot swapping, enables the repair or replacement of computer system parts without disturbing the operation of the system.
- Hot-pluggable cooling fans can be removed or inserted into a computer system without eliminating the power to the system, but the fan blades often remain spinning when the fan is removed from the system.
- the fan is usually surrounded by finger guards that prevent the person from touching the rotating fan blades.
- the finger guards add to the cost of the fan assembly, impede airflow under normal fan operating conditions, and add to the thickness of the fan assembly.
- FIG. 1 is an exploded view of a hot-pluggable cooling fan system in accordance with the invention.
- FIG. 2 is a perspective view of an embodiment of the invention having three of the hot-pluggable cooling fan systems of FIG. 1.
- FIG. 3 is a perspective view of the embodiment shown in FIG. 2 from a different perspective, and with a section removed.
- FIG. 4 is a perspective view of a further embodiment of the mechanical stopper in accordance with the invention.
- FIGS. 2 and 3 show an embodiment of the invention having three hot-pluggable cooling fan systems 5 configured in a row.
- the hot-pluggable cooling fan system 5 includes a chassis assembly 10 and a fan assembly 15 .
- Each fan assembly 15 is insertable into, and removable from, the chassis assembly 10 .
- the left-most fan assembly 15 is shown partially removed from its normal operating position inside its corresponding chassis assembly 10 , while the other two fan assemblies 15 to the right are shown inside their corresponding chassis assemblies 10 .
- the fan assembly 15 includes a square-shaped fan unit 20 having a number of fan blades 25 .
- the fan assembly 15 also includes a handle piece 30 with two tongues 32 and 34 that fit around, and affix to, corresponding sides 36 and 38 of the fan unit 20 .
- a gap 41 (see FIG. 2) is formed between a top 40 of the handle piece 30 and a top 42 of the fan unit 20 .
- the handle piece 30 has two holes 44 in its top 40 which allow a user to grasp the handle piece 30 and to easily insert and remove the fan assembly 15 into and from the chassis assembly 10 .
- the fan assembly 15 does not have finger guards or similar structure to prevent the user's fingers from coming into contact with moving fan blades 25 , because such protective structure is not needed for this invention.
- the chassis assembly 10 includes two sidewalls 50 and 52 and a hinged door piece 54 that extends between the two sidewalls 50 and 52 .
- the chassis thus forms the chamber into which the fan assembly 15 is inserted.
- the chassis assembly 10 may be, for example, an integral part of a computer server assembly (not shown). Other structure from the computer server may also form part of the chassis structure, for example, some structure is needed to serve as a stop for the fan assembly 15 when the fan assembly 15 is placed in the chassis assembly 10 .
- a sidewall, such as sidewall 35 may serve as a common sidewall for two chassis assemblies 10 .
- the door 54 in FIG. 1 (and also in the leftmost fan system 5 in FIG. 2) is shown in an open position, thus making it possible for a user to insert, or to remove, the fan assembly 20 into, or from, the chassis assembly 10 .
- the chassis assembly 10 also includes a pair of brushes 56 and 58 .
- the brushes 56 and 58 are positioned on opposing sides of the chassis assembly 10 such that the bristles extend into the chamber formed by the chassis assembly 10 .
- the bristles of brush 56 extend toward the bristles of brush 58 , and in this particular embodiment, the bristles have similar thickness and flexibility to bristles on a paintbrush.
- the bristles of the brushes 56 and 58 are also positioned such that when the fan assembly 15 is removed from the chassis assembly 10 , the brushes 56 and 58 will act as a mechanical stopper and come into contact with fan blades 25 (see the left-most fan system 5 in FIGS. 2 and 3), so that if the fan blades 25 are still rotating, that rotation will be stopped.
- the fan assembly 15 is a hot-pluggable, electrically powered device. When the fan assembly 15 is inserted into the chassis 10 , it becomes plugged into electrical power in a conventional way, for example, by a conventional electrical connection (not shown) at a bottom 60 (FIG. 1) of the fan assembly 15 . As such, when the fan assembly 15 is removed while the apparatus the fan is cooling (for example, a computer server) is still in operation, power will not be shut off to the fan assembly 15 until the fan assembly 15 first becomes unplugged.
- a conventional electrical connection not shown
- a user opens the door 54 of the chassis assembly 10 and grasps the fan assembly 15 through holes 44 .
- the user pulls the fan assembly 15 out of the chassis assembly 10 .
- the bristles of brushes 56 and 58 come into contact with fan blades 25 , which stops the fan blades 25 from rotating.
- the fan blades 25 are stopped from continued rotation before the spinning blades 25 are exposed in a way that presents a safety hazard.
- the door 54 may be spring-loaded. Once the fan assembly 15 is completely removed from the chassis assembly 10 , the door 54 automatically closes and prevents the user from contacting the adjacent fan assembly 15 and hazardous energy sources.
- a safe, hot-pluggable fan system is thus possible without the need for finger guards as with the prior art.
- the invention thus may have one or more of the following advantages: a savings in cost, improved airflow, and reduced thickness of the fan assembly.
- a number of embodiments of the invention have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention.
- a single stopper be it a brush ( 56 or 58 ) or a flexible finger, may be used.
- Another embodiment may use a mechanical stopper to contact only the hub of the fan unit instead of the fan blades 25 .
- a further embodiment may use a brush ( 56 or 58 ) mounted on the door 54 .
- embodiments of the invention may include any number of fan systems 5 , for example, an embodiment with three such systems 5 as shown in FIGS. 2 and 3. Accordingly, other embodiments are within the scope of the following claims.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A cooling fan system has a fan assembly that is removably housed in a chassis. The fan assembly receives electrical power, and the fan blades rotate when housed inside the chassis. As the fan assembly is removed from an opening in the chassis, the power to the fan assembly is disconnected, but the fan blades may continue to rotate. A mechanical stopper, such as a row of bristles that extends into the opening in the chassis, interferes with the rotation of the fan blades as the fan assembly is removed from the chassis. The mechanical stopper stops rotation of the fan blades, thereby preventing harm to the user removing the fan assembly. After the fan assembly is completely removed from the chassis, a spring-loaded door closes the opening in the chassis further protecting the user from contacting adjacent spinning fan blades or hazardous energy sources within the chassis.
Description
- This invention relates to heat dissipation from electronic components, and more particularly to a hot-pluggable cooling fan system.
- The electronic components and central processing units used in computer systems often generate heat, which could influence the system performance or result in damage to the components. Typically, one or more cooling fans are used to dissipate heat from the components and maintain a satisfactory operating temperature. Many computer systems that employ cooling fans for heat removal are vital to the user, so it is undesirable to eliminate power to the computer system for repair or replacement of a cooling fan. One solution to this problem is to use hot-pluggable parts. The hot-plugging technique, sometimes known as hot swapping, enables the repair or replacement of computer system parts without disturbing the operation of the system.
- Hot-pluggable cooling fans can be removed or inserted into a computer system without eliminating the power to the system, but the fan blades often remain spinning when the fan is removed from the system. In order to avoid any harm to a person removing the hot-pluggable cooling fan, the fan is usually surrounded by finger guards that prevent the person from touching the rotating fan blades. However, the finger guards add to the cost of the fan assembly, impede airflow under normal fan operating conditions, and add to the thickness of the fan assembly.
- FIG. 1 is an exploded view of a hot-pluggable cooling fan system in accordance with the invention.
- FIG. 2 is a perspective view of an embodiment of the invention having three of the hot-pluggable cooling fan systems of FIG. 1.
- FIG. 3 is a perspective view of the embodiment shown in FIG. 2 from a different perspective, and with a section removed.
- FIG. 4 is a perspective view of a further embodiment of the mechanical stopper in accordance with the invention.
- Like reference symbols in the various drawings indicate like elements.
- A hot-pluggable
cooling fan system 5 in accordance with the invention is shown by exploded view in FIG. 1, and also by perspective views in FIGS. 2 and 3. FIGS. 2 and 3 show an embodiment of the invention having three hot-pluggablecooling fan systems 5 configured in a row. As best shown in FIG. 1, the hot-pluggablecooling fan system 5 includes achassis assembly 10 and afan assembly 15. Eachfan assembly 15 is insertable into, and removable from, thechassis assembly 10. In FIGS. 2 and 3, theleft-most fan assembly 15 is shown partially removed from its normal operating position inside itscorresponding chassis assembly 10, while the other two fan assemblies 15 to the right are shown inside theircorresponding chassis assemblies 10. - The
fan assembly 15, as best shown in FIG. 1, includes a square-shaped fan unit 20 having a number offan blades 25. Thefan assembly 15 also includes ahandle piece 30 with twotongues corresponding sides fan unit 20. When thehandle piece 30 is so affixed to thefan unit 20, a gap 41 (see FIG. 2) is formed between atop 40 of thehandle piece 30 and atop 42 of thefan unit 20. Thehandle piece 30 has twoholes 44 in itstop 40 which allow a user to grasp thehandle piece 30 and to easily insert and remove thefan assembly 15 into and from thechassis assembly 10. Notably, thefan assembly 15 does not have finger guards or similar structure to prevent the user's fingers from coming into contact with movingfan blades 25, because such protective structure is not needed for this invention. - The
chassis assembly 10 includes twosidewalls door piece 54 that extends between the twosidewalls fan assembly 15 is inserted. Thechassis assembly 10 may be, for example, an integral part of a computer server assembly (not shown). Other structure from the computer server may also form part of the chassis structure, for example, some structure is needed to serve as a stop for thefan assembly 15 when thefan assembly 15 is placed in thechassis assembly 10. Also, when there areadjacent fan systems 5 as in the FIG. 2 and 3 embodiments, a sidewall, such assidewall 35, may serve as a common sidewall for twochassis assemblies 10. Thedoor 54 in FIG. 1 (and also in theleftmost fan system 5 in FIG. 2) is shown in an open position, thus making it possible for a user to insert, or to remove, thefan assembly 20 into, or from, thechassis assembly 10. - The
chassis assembly 10 also includes a pair ofbrushes brushes chassis assembly 10 such that the bristles extend into the chamber formed by thechassis assembly 10. The bristles ofbrush 56 extend toward the bristles ofbrush 58, and in this particular embodiment, the bristles have similar thickness and flexibility to bristles on a paintbrush. The bristles of thebrushes fan assembly 15 is removed from thechassis assembly 10, thebrushes left-most fan system 5 in FIGS. 2 and 3), so that if thefan blades 25 are still rotating, that rotation will be stopped. When thefan assembly 15 is fully inserted into itschassis assembly 10, the bristles of thebrushes brushes fan blades 25. In FIG. 3 thebrush 56 of theright-most fan system 5 was removed to show the location of the bristles of thebrush 58 in thegap 41. - The
fan assembly 15 is a hot-pluggable, electrically powered device. When thefan assembly 15 is inserted into thechassis 10, it becomes plugged into electrical power in a conventional way, for example, by a conventional electrical connection (not shown) at a bottom 60 (FIG. 1) of thefan assembly 15. As such, when thefan assembly 15 is removed while the apparatus the fan is cooling (for example, a computer server) is still in operation, power will not be shut off to thefan assembly 15 until thefan assembly 15 first becomes unplugged. - To remove a
fan assembly 15 while the apparatus the fan is cooling is still in operation, and hence thefan blades 25 are rotating, a user opens thedoor 54 of thechassis assembly 10 and grasps thefan assembly 15 throughholes 44. The user pulls thefan assembly 15 out of thechassis assembly 10. As this is being done, the bristles ofbrushes fan blades 25, which stops thefan blades 25 from rotating. Thefan blades 25 are stopped from continued rotation before thespinning blades 25 are exposed in a way that presents a safety hazard. Thedoor 54 may be spring-loaded. Once thefan assembly 15 is completely removed from thechassis assembly 10, thedoor 54 automatically closes and prevents the user from contacting theadjacent fan assembly 15 and hazardous energy sources. - A safe, hot-pluggable fan system is thus possible without the need for finger guards as with the prior art. The invention thus may have one or more of the following advantages: a savings in cost, improved airflow, and reduced thickness of the fan assembly. A number of embodiments of the invention have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention. For example, instead of
brushes plastic fingers 66 and 68 (FIG. 4) may be used to interfere with thefan blades 25 as afan assembly 15 is removed from thechassis assembly 10, or further yet, a single stopper, be it a brush (56 or 58) or a flexible finger, may be used. Another embodiment may use a mechanical stopper to contact only the hub of the fan unit instead of thefan blades 25. A further embodiment may use a brush (56 or 58) mounted on thedoor 54. Also, embodiments of the invention may include any number offan systems 5, for example, an embodiment with threesuch systems 5 as shown in FIGS. 2 and 3. Accordingly, other embodiments are within the scope of the following claims.
Claims (17)
1. A hot-pluggable cooling fan system comprising:
a fan assembly having a plurality of fan blades; and
a chassis to removably house the fan assembly, comprising:
an opening through which the fan assembly can be inserted; and
a mechanical stopper to interfere with the motion of the fan blades as the fan assembly is removed from the chassis.
2. The hot-pluggable cooling fan system of claim 1 , wherein the mechanical stopper includes bristles that extend into the opening.
3. The hot-pluggable cooling fan system of claim 1 , wherein the mechanical stopper includes a flexible plastic finger that extends into the opening.
4. The hot-pluggable cooling fan system of claim 1 , wherein the mechanical stopper contacts the fan blades from only one side of the plane of rotation of the fan blades.
5. The hot-pluggable cooling fan system of claim 1 , wherein the mechanical stopper contacts the fan blades from both sides of the plane of rotation of the fan blades.
6. The hot-pluggable cooling fan system of claim 1 , further comprising a door to cover the opening.
7. The door of claim 6 , wherein the door is a spring-loaded door to cover the opening after the fan assembly is removed from the chassis.
8. A hot-pluggable fan assembly for user insertion into and removal from a chassis, the fan assembly being electrically powered when inside the chassis and comprising a fan blade that is exposed to a user when outside the chassis, wherein, as the fan assembly is removed from the chassis, a mechanical stopper associated with the chassis stops any continued rotation of the fan blade.
9. The hot-pluggable cooling fan assembly of claim 8 , wherein the mechanical stopper includes bristles that extend into the opening and contact the fan blade only as the fan assembly is removed from the chassis.
10. The hot-pluggable cooling fan assembly of claim 8 , wherein the mechanical stopper includes a flexible plastic finger that extends into the opening and contacts the fan blade only as the fan assembly is removed from the chassis.
11. The hot-pluggable cooling fan assembly of claim 8 , wherein the mechanical stopper contacts the fan blades from only one side of the plane of rotation of the fan blades.
12. The hot-pluggable cooling fan assembly of claim 8 , wherein the mechanical stopper contacts the fan blades from both sides of the plane of rotation of the fan blades.
13. A method for removing a fan assembly from a hot-pluggable cooling fan system that includes a fan assembly having a plurality of blades, and a chassis to removably house the fan assembly, the method comprising guiding the fan assembly out of the chassis through an opening in the chassis, thus causing a mechanical stopper associated with the chassis to interfere with the motion of the fan blades as the fan assembly is guided through the opening.
14. The method as defined by claim 13 , wherein the mechanical stopper includes bristles that extend into the opening.
15. The method as defined by claim 13 , wherein the mechanical stopper includes a flexible plastic finger that extends into the opening.
16. The method as defined by claim 13 , further comprising a door to cover the opening.
17. The method as defined by claim 17 , wherein the door is a spring-loaded door to cover the opening after the fan assembly is removed from the chassis.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/823,304 US20020141879A1 (en) | 2001-03-29 | 2001-03-29 | Hot-pluggable cooling fan system with an interference safety device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/823,304 US20020141879A1 (en) | 2001-03-29 | 2001-03-29 | Hot-pluggable cooling fan system with an interference safety device |
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Publication Number | Publication Date |
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US20020141879A1 true US20020141879A1 (en) | 2002-10-03 |
Family
ID=25238365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/823,304 Abandoned US20020141879A1 (en) | 2001-03-29 | 2001-03-29 | Hot-pluggable cooling fan system with an interference safety device |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7639496B2 (en) | 2008-01-16 | 2009-12-29 | Huawei Technologies Co., Ltd. | Hot pluggable fan system and connection apparatus |
US20100169585A1 (en) * | 2008-12-31 | 2010-07-01 | Robin Steinbrecher | Dynamic updating of thresholds in accordance with operating conditons |
US20130195688A1 (en) * | 2012-01-30 | 2013-08-01 | Hon Hai Precision Industry Co., Ltd. | Hot plug fan and electronic device having the same |
US8814504B2 (en) | 2011-09-30 | 2014-08-26 | International Business Machines Corporation | Fan brake |
US20160169237A1 (en) * | 2014-12-10 | 2016-06-16 | International Business Machines Corporation | Protective cover assembly for air-moving assembly |
US9629284B2 (en) | 2014-09-29 | 2017-04-18 | International Business Machines Corporation | Interlock assembly for air-moving assembly |
US9861010B2 (en) | 2014-09-29 | 2018-01-02 | International Business Machines Corporation | Protective louver assembly for air-moving assembly |
US9907211B2 (en) | 2014-09-29 | 2018-02-27 | International Business Machines Corporation | Locking louver assembly for air-moving assembly |
US9941041B2 (en) | 2015-04-08 | 2018-04-10 | International Business Machines Corporation | Electromechanical assembly controlled by sensed voltage |
US11326621B2 (en) * | 2018-09-07 | 2022-05-10 | International Business Machines Corporation | Implementing electronic enclosure cooling containment for concurrent maintenance actions |
-
2001
- 2001-03-29 US US09/823,304 patent/US20020141879A1/en not_active Abandoned
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7639496B2 (en) | 2008-01-16 | 2009-12-29 | Huawei Technologies Co., Ltd. | Hot pluggable fan system and connection apparatus |
US20100169585A1 (en) * | 2008-12-31 | 2010-07-01 | Robin Steinbrecher | Dynamic updating of thresholds in accordance with operating conditons |
US7984250B2 (en) | 2008-12-31 | 2011-07-19 | Intel Corporation | Dynamic updating of thresholds in accordance with operating conditons |
US8814504B2 (en) | 2011-09-30 | 2014-08-26 | International Business Machines Corporation | Fan brake |
US20130195688A1 (en) * | 2012-01-30 | 2013-08-01 | Hon Hai Precision Industry Co., Ltd. | Hot plug fan and electronic device having the same |
US9861010B2 (en) | 2014-09-29 | 2018-01-02 | International Business Machines Corporation | Protective louver assembly for air-moving assembly |
US9648786B2 (en) | 2014-09-29 | 2017-05-09 | International Business Machines Corporation | Interlock assembly for air-moving assembly |
US9907211B2 (en) | 2014-09-29 | 2018-02-27 | International Business Machines Corporation | Locking louver assembly for air-moving assembly |
US11197394B2 (en) | 2014-09-29 | 2021-12-07 | International Business Machines Corporation | Protective louver assembly for air-moving assembly |
US9968006B2 (en) | 2014-09-29 | 2018-05-08 | International Business Machines Corporation | Locking louver assembly for air-moving assembly |
US9629284B2 (en) | 2014-09-29 | 2017-04-18 | International Business Machines Corporation | Interlock assembly for air-moving assembly |
US10299409B2 (en) | 2014-09-29 | 2019-05-21 | International Business Machines Corporation | Protective louver assembly for air-moving assembly |
US11147190B2 (en) | 2014-12-10 | 2021-10-12 | International Business Machines Corporation | Protective cover assembly for air-moving assembly |
US20160169237A1 (en) * | 2014-12-10 | 2016-06-16 | International Business Machines Corporation | Protective cover assembly for air-moving assembly |
US10271459B2 (en) * | 2014-12-10 | 2019-04-23 | International Business Machines Corporation | Protective cover assembly for air-moving assembly |
US10128032B2 (en) | 2015-04-08 | 2018-11-13 | International Business Machines Corporation | Electromechanical assembly controlled by sensed voltage |
US10600543B2 (en) | 2015-04-08 | 2020-03-24 | International Business Machines Corporation | Electromechanical assembly controlled by sensed voltage |
US9941041B2 (en) | 2015-04-08 | 2018-04-10 | International Business Machines Corporation | Electromechanical assembly controlled by sensed voltage |
US11326621B2 (en) * | 2018-09-07 | 2022-05-10 | International Business Machines Corporation | Implementing electronic enclosure cooling containment for concurrent maintenance actions |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTEL CORPORATION, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WINKEL, CASEY;VAN SLEET, DONOVAN;STEINBRECHER, ROBIN A.;REEL/FRAME:011964/0974 Effective date: 20010622 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |