CN105587200A - Cold channel for computer room of data center - Google Patents

Cold channel for computer room of data center Download PDF

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Publication number
CN105587200A
CN105587200A CN201510331595.3A CN201510331595A CN105587200A CN 105587200 A CN105587200 A CN 105587200A CN 201510331595 A CN201510331595 A CN 201510331595A CN 105587200 A CN105587200 A CN 105587200A
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CN
China
Prior art keywords
frame
rotating
data center
cold passage
fixed
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.)
Pending
Application number
CN201510331595.3A
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Chinese (zh)
Inventor
高利擎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Lang Wei Electric Mechanical Co Ltd
Original Assignee
Suzhou Lang Wei Electric Mechanical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzhou Lang Wei Electric Mechanical Co Ltd filed Critical Suzhou Lang Wei Electric Mechanical Co Ltd
Priority to CN201510331595.3A priority Critical patent/CN105587200A/en
Publication of CN105587200A publication Critical patent/CN105587200A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a cold channel for a computer room of a data center. The cold channel for the computer room of the data center comprises a pair of cabinet lines arranged in parallel, wherein each cabinet line consists of a plurality of cabinets which are adhered to one another in the front-back direction; space between the cabinet lines is served as the cold channel; closing doors are respectively arranged at two ends of the cold channel; a plurality of closed skylight assemblies which are arranged along the trend of the cold channel are arranged on the top of the cold channel; and the adjacent skylight assemblies are spliced to one another in a closed manner. The skylight assemblies of the cold channel for the computer room of the data center are designed in a modular manner, can be spliced to one another, are made of transparent plates, and can meet requirements of acquisition of rotating ring monitoring images, rotating frames of the skylight assemblies can rotate and reset relative to a top frame, skylights are opened in a nondestructive manner, can be reset at any time, and are opened rapidly, the opening angles of the skylights are 90 degrees and particularly meet requirements of fire fighting, the transparent plates are convenient to maintain, clean and change at ordinary times, and a motor case is further arranged to protect a chain wheel, a chain, a retractable rod and a push rod motor, so that the skylight assemblies can be used for a long time.

Description

The cold passage of data center machine room
Technical field
The present invention relates to the cold passage of data center machine room.
Background technology
Data center machine room is all provided with cold passage mostly, and cold passage can be furnished with skylight, but existing cold passage skylight or be not openable, or open and reset inconvenient.
Summary of the invention
The object of the invention is to overcome defect of the prior art, provide a kind of data center machine room cold passage.
For achieving the above object, technical scheme of the present invention is the cold passage of a kind of data center machine room of design, comprise a pair of rack row of arranging side by side, every row rack be listed as by multiple front and back recline arrange rack form, space between rack row is made as cold passage, two ends at cold passage arrange respectively closing door, and described cold channel roof is provided with some groups and moves towards the airtight day window assembly of arranging, the mutual airtight splicing of window assembly in adjacent day along cold passage;
Within described day, window assembly comprises:
The rectangular top frame of horizontal;
For two perpendicular rectangle carriages of putting that are parallel to each other of support top frame, described two carriages are fixed with a pair of frame being parallel to each other of top frame respectively, and with this, frame are arranged in the same way;
Be individually fixed in the sash of above-mentioned two carriages and with two side plates of the airtight laminating of corresponding sash;
Be located at rotationally in the circle lattice of top and with the rectangle of the airtight laminating of this sash can magnetic rotating frame;
Be fixed in rotating frame sash and with the transparent panel of the airtight laminating of this sash;
Two rotating shafts fixing with rotating frame respectively and rotate for supporting rotating frame, described two rotating shafts are coaxial, be rotationally connected respectively with the above-mentioned a pair of frame of top frame, parallel to frame with another of top frame, and rotating shaft core line and rotating frame center of gravity misplace;
For adsorbing and lock the electromagnetic lock of horizontal rotating frame, this electromagnetic lock is fixed on a frame of top frame, this frame be top frame above-mentioned another to one in frame, and this frame is larger one of place frame centering and rotating shaft core linear distance;
The limiting component that is fixed on the upper surface of rotating shaft place frame and rotates for restricting rotation frame, and described limiting component is between electromagnetic lock place frame and rotating shaft core line;
The sprocket wheel of a fixed cover rotating shaft free end periphery located therein;
The chain rotating with sprocket engagement and for drive sprocket;
Be connected with chain one end and for conduction chain to drive the expansion link of sprocket rotation, the flexible direction of this expansion link is perpendicular to the rotating shaft of sprocket wheel place, and this expansion link and limiting component are divided into the both sides of rotating shaft place vertical plane;
Drive the flexible push-rod electric machine of expansion link;
Be fixed on the travel switch stopping on the frame of top and for controlling push-rod electric machine;
Be fixed on rotating frame and in the time of rotating frame horizontal, trigger the feeler lever of travel switch;
Be fixed on the motor housing of top frame one side, this motor housing wraps up above-mentioned sprocket wheel, chain, expansion link and push-rod electric machine, and the rotating shaft of sprocket wheel place runs through this motor housing;
Wherein, two carriages are fixed with two racks respectively, and these two racks are two corresponding racks in rack row; The corresponding carriage of adjacent day window assembly splices mutually, and the top frame of adjacent day window assembly splices mutually.
Preferably, described top frame and/or carriage are provided with butt hole, trough and cable-through hole.
Preferably, in described motor housing, be provided with for preventing that chain from departing from the pressing plate of sprocket wheel.
Preferably, the other end of described chain and motor housing are directly or indirectly fixing, and this stiff end and expansion link are divided into the both sides of rotating shaft place vertical plane, and this stiff end is positioned at sprocket wheel below.
Preferably, described limiting component comprises the elastic spacing piece that rotating frame is limited in to perpendicular configuration state.
Preferably, on the frame of described top, be also provided with binding post.
Preferably, described motor housing comprises casing and cover plate.
Preferably, described closing door is sliding door.
Preferably, described closing door is furnished with gate control system.
Preferably, described closing door is furnished with inductive switch.
The present invention also provides the course of work of above-mentioned day window assembly:
Under normal conditions, rotating frame is adsorbed by electromagnetic lock and is locked in horizontal state, rotating frame in the airtight state of top frame, skylight normality closure; Now, expansion link is in stretching out state, suitably control chain length, make chain between expansion link and sprocket wheel in relaxed state, be the rectilineal interval that chain length between expansion link and sprocket wheel is greater than expansion link and sprocket wheel, and the difference of this chain length and rectilineal interval is also more than or equal to 1/4 of sprocket wrap girth;
While needing opened skylight, control electromagnetic lock power-off and thread off, rotating frame is because Action of Gravity Field rotates rapidly, and open rapidly in skylight, in the process of rotating at rotating frame, sprocket wheel drives chain to move, and the chain between expansion link and sprocket wheel is tightened up gradually by relaxed state, until rotating frame contact limiting component, and limited component limitations is at perpendicular configuration state, now, the chain length between expansion link and sprocket wheel is in shortest length, and this shortest length is more than or equal to the rectilineal interval of expansion link and sprocket wheel;
When skylight need to be resetted, control electromagnetic lock and switch on to prepare absorption and locking rotating frame, and control push-rod electric machine and move, expansion link is shunk, even if expansion link is away from sprocket wheel, in process at expansion link away from sprocket wheel, expansion link conduction chain also drives sprocket rotation, and then drive rotating frame to reset, rotating frame is during again with the airtight laminating of top frame, feeler lever on rotating frame triggers travel switch, travel switch control push-rod electric machine stops, control again push-rod electric machine reversion, make expansion link return to the above-mentioned state that stretches out, and then make chain between expansion link and sprocket wheel in above-mentioned relaxed state.
The cold passage of data center machine room of the present invention, its day window assembly is modularized design, can mutually splice, its carriage can be fixed with rack, adopt transparent panel, can meet power & environment supervision image acquisition request, its rotating frame can and reset with respect to the rotation of top frame, the unlatching in skylight is nondestructive, can reset at any time, and open rapidly in skylight, skylight opening angle can be 90 degree, be particularly suitable for fire-fighting demand, safeguard at ordinary times, clean, change transparent panel also more convenient, motor housing is also set with protection sprocket wheel, chain, expansion link and push-rod electric machine, ensure the long-term use of day window assembly.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention;
Fig. 2 is the schematic diagram of day window assembly.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described. Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
The concrete technical scheme of implementing of the present invention is:
As shown in Figure 1 and Figure 2, the cold passage of a kind of data center machine room, comprise a pair of rack row A1 arranging side by side, every row rack row A1 by multiple front and back recline arrange rack form, space between rack row A1 is made as cold passage, two ends at cold passage arrange respectively closing door A2, and described cold channel roof is provided with some groups and moves towards the airtight day window assembly A3 arranging, the mutual airtight splicing of window assembly A3 in adjacent day along cold passage;
Within described day, window assembly A3 comprises:
The rectangular top frame 1 of horizontal;
For two perpendicular rectangle carriages 2 of putting that are parallel to each other of support top frame 1, described two carriages 2 are fixing with a pair of frame being parallel to each other 11,12 of top frame 1 respectively, and with this, frame arranged in the same way;
Be individually fixed in the sash of above-mentioned two carriages 2 and with two side plates 21 of the airtight laminating of corresponding sash;
Be located at rotationally in top frame 1 sash and with the rectangle of the airtight laminating of this sash can magnetic rotating frame 3;
Be fixed in rotating frame 3 sashes and with the transparent panel 31 of the airtight laminating of this sash;
And two rotating shafts 41,42 of for support rotating frame 3 rotating fixing with rotating frame 3 respectively, described two rotating shafts 41,42 are coaxial, be rotationally connected respectively with the above-mentioned a pair of frame 11,12 of top frame 1, parallel to frame 13,14 with another of top frame 1, and rotating shaft core line and rotating frame 3 centers of gravity dislocation;
For adsorbing and lock the electromagnetic lock 5 of horizontal rotating frame 3, this electromagnetic lock 5 is fixed on a frame 13 of top frame 1, this frame 13 be top frame 1 above-mentioned another to one in frame 13,14, and this frame 13 be place frame in (13,14) with larger one of rotating shaft core linear distance;
Be fixed on the upper surface of rotating shaft (41 and/or 42) place frame (11 and/or 12) the limiting component 6 rotating for restricting rotation frame 3, and described limiting component 6 is between electromagnetic lock 5 place frames 13 and rotating shaft core line;
The sprocket wheel 7 of fixed cover rotating shaft 41 free end peripheries located therein;
The chain (not shown) that engages and rotate for drive sprocket 7 with sprocket wheel 7;
Be connected with chain one end and for conduction chain the expansion link 71 to rotate with movable sprocket 7, the flexible direction of this expansion link 71 is perpendicular to sprocket wheel 7 place rotating shafts 41, and this expansion link 71 and limiting component 6 are divided into the both sides of rotating shaft 41,42 place vertical planes;
Drive the flexible push-rod electric machine 72 of expansion link 71;
Be fixed on the travel switch 8 stopping on top frame 1 and for controlling push-rod electric machine 72;
Be fixed on rotating frame 3 and in the time of rotating frame 3 horizontal, trigger the feeler lever 32 of travel switch 8;
Be fixed on the motor housing 9 of top frame 1 one sides, this motor housing 9 wraps up above-mentioned sprocket wheel 7, chain, expansion link 71 and push-rod electric machine 72, and sprocket wheel 7 place rotating shafts 41 run through this motor housing 9;
Wherein, two carriages 2 are fixed with two racks respectively, and these two racks are two corresponding racks in rack row A1; The corresponding carriage 2 of adjacent day window assembly A3 splices mutually, and the top frame 1 of adjacent day window assembly A3 splices mutually.
Described top frame 1 and/or carriage 2 are provided with butt hole, trough and cable-through hole.
In described motor housing 9, be provided with for preventing that chain from departing from the pressing plate 91 of sprocket wheel 7.
The other end of described chain and motor housing 9 are directly or indirectly fixing, and this stiff end and expansion link 71 are divided into the both sides of rotating shaft place vertical plane, and this stiff end is positioned at sprocket wheel 7 belows.
Described limiting component 6 comprises the elastic spacing piece that rotating frame 3 is limited in to perpendicular configuration state.
On described top frame 1, be also provided with binding post 15.
Described motor housing 9 comprises casing 92 and cover plate 93.
Described closing door A2 is sliding door.
Described closing door A2 is furnished with gate control system.
Described closing door A2 is furnished with inductive switch.
The present invention also provides the course of work of above-mentioned day window assembly A3:
Under normal conditions, rotating frame 3 is adsorbed by electromagnetic lock 5 and is locked in horizontal state, rotating frame 3 in the airtight state of top frame 1, skylight normality closure; Now, expansion link 71 is in stretching out state, suitably control chain length, make chain between expansion link 71 and sprocket wheel 7 in relaxed state, be the rectilineal interval that chain length between expansion link 71 and sprocket wheel 7 is greater than expansion link 71 and sprocket wheel 7, and the difference of this chain length and rectilineal interval is also more than or equal to 1/4 of sprocket wheel 7 periphery girths;
While needing opened skylight, control electromagnetic lock 5 power-off and thread off, rotating frame 3 is because Action of Gravity Field rotates rapidly, open rapidly in skylight, in the process of rotating at rotating frame 3, sprocket wheel 7 drives chain to move, chain between expansion link 71 and sprocket wheel 7 is tightened up gradually by relaxed state, until rotating frame 3 contacts limiting component 6, and limited parts 6 are limited in perpendicular configuration state, now, the chain length between expansion link 71 and sprocket wheel 7 is in shortest length, and this shortest length is more than or equal to the rectilineal interval of expansion link 71 and sprocket wheel 7;
When skylight need to be resetted, control electromagnetic lock 5 and switch on to prepare absorption and locking rotating frame 3, and control push-rod electric machine 72 and move, expansion link 71 is shunk, even if expansion link 71 is away from sprocket wheel 7, in process at expansion link 71 away from sprocket wheel 7, expansion link 71 conduction chains are also with movable sprocket 7 to rotate, and then drive rotating frame 3 to reset, rotating frame 3 is during again with the airtight laminating of top frame 1, feeler lever 32 on rotating frame 3 triggers travel switch 8, travel switch 8 is controlled push-rod electric machine 72 and is stopped, controlling push-rod electric machine 72 reverses again, make expansion link 71 return to the above-mentioned state that stretches out, and then make chain between expansion link 71 and sprocket wheel 7 in above-mentioned relaxed state.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. the cold passage of data center machine room, comprise a pair of rack row of arranging side by side, every row rack be listed as by multiple front and back recline arrange rack form, space between rack row is made as cold passage, two ends at cold passage arrange respectively closing door, it is characterized in that, described cold channel roof is provided with some groups and moves towards the airtight day window assembly of arranging, the mutual airtight splicing of window assembly in adjacent day along cold passage;
Within described day, window assembly comprises:
The rectangular top frame of horizontal;
For two perpendicular rectangle carriages of putting that are parallel to each other of support top frame, described two carriages are fixed with a pair of frame being parallel to each other of top frame respectively, and with this, frame are arranged in the same way;
Be individually fixed in the sash of above-mentioned two carriages and with two side plates of the airtight laminating of corresponding sash;
Be located at rotationally in the circle lattice of top and with the rectangle of the airtight laminating of this sash can magnetic rotating frame;
Be fixed in rotating frame sash and with the transparent panel of the airtight laminating of this sash;
Two rotating shafts fixing with rotating frame respectively and rotate for supporting rotating frame, described two rotating shafts are coaxial, be rotationally connected respectively with the above-mentioned a pair of frame of top frame, parallel to frame with another of top frame, and rotating shaft core line and rotating frame center of gravity misplace;
For adsorbing and lock the electromagnetic lock of horizontal rotating frame, this electromagnetic lock is fixed on a frame of top frame, this frame be top frame above-mentioned another to one in frame, and this frame is larger one of place frame centering and rotating shaft core linear distance;
The limiting component that is fixed on the upper surface of rotating shaft place frame and rotates for restricting rotation frame, and described limiting component is between electromagnetic lock place frame and rotating shaft core line;
The sprocket wheel of a fixed cover rotating shaft free end periphery located therein;
The chain rotating with sprocket engagement and for drive sprocket;
Be connected with chain one end and for conduction chain to drive the expansion link of sprocket rotation, the flexible direction of this expansion link is perpendicular to the rotating shaft of sprocket wheel place, and this expansion link and limiting component are divided into the both sides of rotating shaft place vertical plane;
Drive the flexible push-rod electric machine of expansion link;
Be fixed on the travel switch stopping on the frame of top and for controlling push-rod electric machine;
Be fixed on rotating frame and in the time of rotating frame horizontal, trigger the feeler lever of travel switch;
Be fixed on the motor housing of top frame one side, this motor housing wraps up above-mentioned sprocket wheel, chain, expansion link and push-rod electric machine, and the rotating shaft of sprocket wheel place runs through this motor housing;
Wherein, two carriages are fixed with two racks respectively, and these two racks are two corresponding racks in rack row; The corresponding carriage of adjacent day window assembly splices mutually, and the top frame of adjacent day window assembly splices mutually.
2. the cold passage of data center machine room according to claim 1, is characterized in that, described top frame and/or carriage are provided with butt hole, trough and cable-through hole.
3. the cold passage of data center machine room according to claim 2, is characterized in that, is provided with for preventing that chain from departing from the pressing plate of sprocket wheel in described motor housing.
4. the cold passage of data center machine room according to claim 3, is characterized in that, the other end of described chain and motor housing are directly or indirectly fixing, and this stiff end and expansion link are divided into the both sides of rotating shaft place vertical plane, and this stiff end is positioned at sprocket wheel below.
5. the cold passage of data center machine room according to claim 4, is characterized in that, described limiting component comprises the elastic spacing piece that rotating frame is limited in to perpendicular configuration state.
6. the cold passage of data center machine room according to claim 5, is characterized in that, on the frame of described top, is also provided with binding post.
7. the cold passage of data center machine room according to claim 6, is characterized in that, described motor housing comprises casing and cover plate.
8. the cold passage of data center machine room according to claim 7, is characterized in that, described closing door is sliding door.
9. the cold passage of data center machine room according to claim 8, is characterized in that, described closing door is furnished with gate control system.
10. the cold passage of data center machine room according to claim 8, is characterized in that, described closing door is furnished with inductive switch.
CN201510331595.3A 2015-06-16 2015-06-16 Cold channel for computer room of data center Pending CN105587200A (en)

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CN201510331595.3A CN105587200A (en) 2015-06-16 2015-06-16 Cold channel for computer room of data center

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Publication Number Publication Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018018747A1 (en) * 2016-07-28 2018-02-01 苏州安瑞可机柜系统有限公司 Modularized server room

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2709481A1 (en) * 1976-03-04 1977-09-15 Reindeer Willemstad Nv SUBDIVISION OF A CONDITIONING ROOM
JPH05156863A (en) * 1991-12-09 1993-06-22 Landis & Gyr Powers Inc Device for obtaining position of movable structure
CN1587602A (en) * 2004-08-27 2005-03-02 孙德岩 Heat insulation sun light house with opening sky light simultaneously
CN201495695U (en) * 2009-08-26 2010-06-02 刘卫明 Automatic fire control movable scuttle
CN202248578U (en) * 2011-10-13 2012-05-30 广州南盾通讯设备有限公司 Air current control device for improving refrigeration efficiency and safety of machine room
CN202273535U (en) * 2011-09-29 2012-06-13 田彩飞 Electric window opener control system
CN202755850U (en) * 2012-08-22 2013-02-27 山东联信能源科技有限公司 Automatic skylight
CN203321180U (en) * 2013-05-07 2013-12-04 南京德威尔信息科技有限公司 Modularization data center automatic skylight device
CN103806704A (en) * 2014-02-13 2014-05-21 深圳市共济科技有限公司 Modularized data center machine room provided with sealed channels
CN204326605U (en) * 2014-10-17 2015-05-13 杭州智廷信息科技有限公司 Modular data center
CN204754567U (en) * 2015-06-16 2015-11-11 苏州朗威电子机械有限公司 Computer room of data center is with cold passageway

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2709481A1 (en) * 1976-03-04 1977-09-15 Reindeer Willemstad Nv SUBDIVISION OF A CONDITIONING ROOM
JPH05156863A (en) * 1991-12-09 1993-06-22 Landis & Gyr Powers Inc Device for obtaining position of movable structure
CN1587602A (en) * 2004-08-27 2005-03-02 孙德岩 Heat insulation sun light house with opening sky light simultaneously
CN201495695U (en) * 2009-08-26 2010-06-02 刘卫明 Automatic fire control movable scuttle
CN202273535U (en) * 2011-09-29 2012-06-13 田彩飞 Electric window opener control system
CN202248578U (en) * 2011-10-13 2012-05-30 广州南盾通讯设备有限公司 Air current control device for improving refrigeration efficiency and safety of machine room
CN202755850U (en) * 2012-08-22 2013-02-27 山东联信能源科技有限公司 Automatic skylight
CN203321180U (en) * 2013-05-07 2013-12-04 南京德威尔信息科技有限公司 Modularization data center automatic skylight device
CN103806704A (en) * 2014-02-13 2014-05-21 深圳市共济科技有限公司 Modularized data center machine room provided with sealed channels
CN204326605U (en) * 2014-10-17 2015-05-13 杭州智廷信息科技有限公司 Modular data center
CN204754567U (en) * 2015-06-16 2015-11-11 苏州朗威电子机械有限公司 Computer room of data center is with cold passageway

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018018747A1 (en) * 2016-07-28 2018-02-01 苏州安瑞可机柜系统有限公司 Modularized server room

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Application publication date: 20160518