CN103687446B - The high efficiency and heat radiation air-conditioning system of rack-mount server rack - Google Patents

The high efficiency and heat radiation air-conditioning system of rack-mount server rack Download PDF

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Publication number
CN103687446B
CN103687446B CN201310651716.3A CN201310651716A CN103687446B CN 103687446 B CN103687446 B CN 103687446B CN 201310651716 A CN201310651716 A CN 201310651716A CN 103687446 B CN103687446 B CN 103687446B
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air
rack
cabinet
conditioning
dividing plate
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CN201310651716.3A
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Chinese (zh)
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CN103687446A (en
Inventor
韩晓红
任彬
王学会
马仁飞
杨璋璋
乔晓刚
陈光明
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浙江大学
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Abstract

The present invention discloses a kind of high efficiency and heat radiation air-conditioning system of rack-mount server rack, comprise refrigeration module, cabinet with air inlet, refrigeration module carries cold air by air inlet to cabinet, dividing plate is provided with in cabinet, the side of this dividing plate is air channel, and opposite side is the spatial accommodation for placing server, and the cross section in air channel reduces along air flow gradient, dividing plate is placed with some air inlets along air flow, and each air inlet is equipped with arc deflector.The cross section being realized air channel by dividing plate is reduced along air flow gradient, such that the speed of the cold air entering each wind gap is equal, air quantity is equal, realizes Homogeneouslly-radiating; By arranging insulation material layer on housing, arranging arc-shaped transition plate and arrange arc deflector in air inlet reduce noise in cabinet corner, when making system works, noise is less.

Description

The high efficiency and heat radiation air-conditioning system of rack-mount server rack

Technical field

The present invention relates to a kind of air-conditioning system field, particularly a kind of high efficiency and heat radiation air-conditioning system of rack-mount server rack.

Background technology

Along with the high speed development of the technology of semiconductor chips, the arithmetic speed of computer processor chip increases exponentially and volume significantly reduces, but the thing followed is the heat dissipation problem of server golf calorific value.In the informationalized epoch, knowledge information enters into the industry-by-industry of society with explosive growth speed.Increasing office, study, public arena have be unable to do without the process of information.Multiple server can be assembled in the rack-mount server in a rack, easy to use, thus had in a large number information processing need but the occasion of non-extensive concentrated message process widely use.As being all equipped with server cabinet in a lot of enterprise, school library.Although a lot of blade servers have employed the processor of low-power consumption in the design, heat density is still very high.This makes 4kW, 6kW, 8kW, 10kW, or even 12kW rack occurs in succession.The heat dissipation problem that these high density server racks face, seriously constrains the development of server cabinet.How to improve the heat-sinking capability of rack?

For the large-scale data such as Large-scale Data Rooms, server host center, water-cooling is adopted can effectively to improve cooling machine cabinet amount.IBM Corporation have employed Water Cooling Technology on mainframe, and by test chart bright water-cooled cabinet, rack server is dispelled the heat and reduce half, water-cooled can save the power consumption of 10%-30%, and cooling effect is better than current traditional cooling means.But water-cooling pattern needs incidentally corresponding cold water heat exchange coil, handpiece Water Chilling Units, and scale is huger, is not suitable for miniaturization.So seldom use water cooled heat radiating in mini standards server cabinet.

Existing separate standards rack major part adopts Air flow heat radiation.Standard rack type server cabinet carries refrigerating system to cool server, machine heat radiation is taken away by the circulation of air-flow in rack.Rack is provided with air inlet, air outlet, and the gas in rack enters into kind of refrigeration cycle by air outlet and lowers the temperature, and the cold air after cooling delivers to interior of equipment cabinet by air inlet.Circulation like this realizes the transmission externally of rack heat.

But the refrigerating capacity that cabinet air conditioner provides is by the restriction of space, noise etc.The small volume of rack own is the limited space that air-conditioning provides.To try one's best in this limited space and reasonably arrange the air supply rate of large gauge, will series of problems be caused.Compressor is in narrow space, and its heat cannot fall apart to the external world in time, and compressor temperature can be higher.Increase condenser, evaporator heat exchange amount, and more heat can be taken away from interior of equipment cabinet, the air quantity of blower fan need be increased, and Wind Volume fan noise will certainly be very large.Air quantity is large, causes the flow velocity of air in air channel to strengthen, and noise strengthens, and have a strong impact on the use of server cabinet, this just proposes very large challenge to the design of air-conditioning system.

The existing patent major part about optimizing in interior of equipment cabinet heat radiation adopts optimizes interior of equipment cabinet air current composition, with limited refrigerating capacity, realize best radiating effect, cold air is uniformly distributed in rack, and be unlikely to the phenomenon that occurs that local temperature is too high.Application publication number be CN102566711A patent document discloses a kind of server cabinet, before this patent, before back side panel and server, an inlet channel and an exhaust passage is formed respectively between rear both sides, inlet channel and exhaust passage are connected with air inlet and exhaust outlet respectively, the air inlet of this server cabinet and exhaust outlet are used for being connected respectively with the air outlet of an aircondition and air intake vent, make the cold airflow blown out by aircondition enter inlet channel from this air inlet and flow in this aircondition to form airflow circulating by exhaust passage and exhaust outlet after flowing through each server via described ventilation hole.But general server cabinet is all higher, the flow direction of its cooling blast is served out or upper entering and lower leaving under being, and due to the louvre size on the front side board of server cabinet identical, this will cause the cooling blast be located near the server cabinet top of aircondition or the server place of bottom superfluous, then not enough to the cooling blast be located at away from the server cabinet bottom of aircondition or the server place on top, be unfavorable for the reasonable distribution of cooling blast and effectively distributing of heat.

Application publication number be CN102478926A patent document discloses a kind of server cabinet, the diameter of this patent to the hole on orifice plate designs, hole near air conditioning air outlet part is little, bore dia away from air conditioning air outlet progressively increases, more even with the amount realizing the air entering each position of rack.Application publication number be CN102480897A patent document discloses a kind of server cabinet, it arranges one and comprises rotating shaft and roll up draw curtain in rotating shaft in the front side of rack, curtain is drawn to be provided with some through holes, the distance of drawing curtain to launch to bottom by this regulates the air quantity entering rack, avoids the air quantity near air conditioning air outlet part excessive.Application publication number be CN102478927A patent document discloses a kind of server cabinet, orifice plate is arranged to rotate around jack shaft by it, the duct cross-section that orifice plate and rack wall form just can progressively become large from the near to the remote, realizes being uniformly distributed of air-flow equally.Above three patent documentations are on the basis that application publication number is the patent documentation of CN102566711A, the air flow method of Optimized Service device inside is carried out from more detailed angle, to the angle of the diameter in hole, plate on the orifice plate of rack air-supply, arrange, make the amount of the cold air delivering to each layer of rack equal.But they do not have corresponding sound-silencing measures, server cabinet noise is comparatively large, and in order to make the amount of the cold air entering each layer of rack equal, heat radiation evenly, also have further room for improvement.

Summary of the invention

For the problems referred to above, the invention provides a kind of high efficiency and heat radiation air-conditioning system of rack-mount server rack.This system can make the noise of cabinet type server less, can make that the air quantity of the cold air entering each layer of rack is equal, wind speed is equal, and cold air has larger wind speed, good heat dissipation effect.

The technical scheme that the present invention takes is as follows:

A kind of high efficiency and heat radiation air-conditioning system of rack-mount server rack, comprise refrigeration module, cabinet with air inlet, described refrigeration module carries cold air by air inlet to cabinet, dividing plate is provided with in described cabinet, the side of this dividing plate is air channel, and opposite side is the spatial accommodation for placing server, and the cross section in air channel reduces along air flow gradient, described dividing plate is placed with some air inlets along air flow, and each air inlet is equipped with arc deflector.

By arc deflector, air-flow can be made more steady, and air flow resistance is less.

As preferably, the evaporator in described refrigeration module, compressor, condenser are arranged in same housing, and the inwall of this housing is provided with insulation material layer.Refrigeration module comprises evaporator, compressor, condenser and choke valve, and they are installed in housing, by arranging insulation material layer in housing, and can effective noise reduction function.

As preferably, described evaporator comprises conduit, and described conduit arc-shaped transition is connected to air inlet.

As preferably, the surface of described insulation material layer has tapered protrusion.This can obtain better soundproof effect.

As preferably, described insulation material layer is deadening felt or fiber board.

Being placed with multiple servers in described spatial accommodation, is wind gap between adjacent two-server, and each air inlet is towards a wind gap of correspondence.

As preferably, one end of described arc deflector and dividing plate tangent fixing, the other end stretches to corresponding wind gap.

As preferably, also comprise the wind outlet section be made up of described arc deflector and cabinet inwall, the inlet face of wind outlet section is to the air flow in air channel, and the outlet of wind outlet section is towards the wind gap of correspondence.Cold air is sent on each server by the wind outlet section be provided with by air inlet, realizes the shunting of cold air.

As preferably, the front, rear, left and right side plate that described cabinet comprises the top board that is parallel to each other and base plate, is connected with base plate with top board, described dividing plate closes on front side board, and described air channel is between front side board and dividing plate.

As preferably, described air inlet is located on base plate or top board, and described back side panel is provided with exhaust outlet away from one end of air inlet.

More preferred, described air inlet is opened on base plate, front side board and and dividing plate between.

As preferably, described exhaust outlet is provided with ventilating fan.Fast air can be expelled to outside cabinet by ventilating fan.

As preferably, the corner of described cabinet inwall is provided with arc-shaped transition plate.Arc-shaped transition plate can ventilate more smooth and easy, and can reduce noise.As preferably, the evaporator in described refrigeration module, compressor, condenser are arranged in same housing, and the inside of this housing is provided with insulation material layer.Noise can be reduced by insulation material layer.

The invention has the beneficial effects as follows:

1. rack air outlet is sleeve configuration air port, and arranges arc deflector to reduce air flow resistance, air port particular design, and cold air can be kept steadily to enter into rack with larger wind speed.

2. the diversion Design in air port makes cold air comparatively large by speed during server, and cold air can be sent to the place farther from air port, and radiating effect is better.

3. the cross section realizing air channel by the distance adjustment of dividing plate and rack wall reduces along air flow gradient, ensure that in air channel, wind speed is stablized, makes the speed of the cold air entering each layer wind gap, air quantity equal, realize the Homogeneouslly-radiating of whole rack.

4., by arranging insulation material layer on housing, arranging the transition of arc water conservancy diversion and the particular design in air port in rack corner, reduce the noise that air flowing produces, improve the air current composition in rack.

Accompanying drawing explanation

Fig. 1 is the schematic cross-section of the high efficiency and heat radiation air-conditioning system of rack-mount server rack of the present invention;

Fig. 2 is that inlet channel air flow moves schematic diagram;

Fig. 3 is refrigeration module vertical view;

Fig. 4 is that in refrigerating system, quieter material arranges vertical view;

Fig. 5 is air handling process figure.

In figure, each Reference numeral is:

1. cabinet, 2. server, 3. back side panel, 4. ventilating fan, 5. exhaust outlet, 6. arc-shaped transition plate, 7. front side board, 8. air inlet, 9. arc deflector, 10. dividing plate, 11. wind gaps, 12. air channels, 13. air inlets, 14. refrigeration modules, 15. base plates, 16. condenser air outlets, 17. condensers, 18. condenser air inlets, 19. evaporator air outlets, 20. evaporators, 21. evaporator air inlets, 22. compressors, 23. insulation material layers, 24. spatial accommodations, 25. top boards.

Embodiment

As shown in Figure 1, a kind of high efficiency and heat radiation air-conditioning system of rack-mount server rack, comprise cabinet 1 and carry the refrigeration module 14 of cold air gas to cabinet 1, front side board 7, back side panel 3, left plate, right plate that cabinet 1 comprises the top board 25 that is parallel to each other and base plate 15, is connected with base plate with top board, dividing plate 10 is provided with in cabinet, dividing plate 10 is made up of polylith segmented plate, and each segmented plate closes on and parallel with front side board 7, and the distance of each segmented plate and front side board 7 reduces from the bottom to top successively.Base plate 15 is provided with the air inlet 13 be connected with refrigeration module 14, and air inlet 13 is opened on base plate, front side board 7 and and dividing plate 10 between.The side of dividing plate is air channel 12, opposite side is the spatial accommodation 24 for placing server, air channel 12 is between front side board and dividing plate, the cross section in air channel reduces in gradient along air flow, air flow refer to air come in from air inlet after the flow direction in air channel, namely the present embodiment air flow to being along front side board direction from the bottom to top.

Multiple servers 2 is placed with in spatial accommodation 24, it is wind gap 11 between adjacent two-server, dividing plate is placed with some air inlets 8 along air flow, each air inlet is provided with two pieces of arc deflectors 9, one end of arc deflector and dividing plate tangent fixing, the other end stretches to corresponding wind gap, and arc deflector can make air-flow more steady, and air flow resistance is less.Two pieces of arc deflectors 9 and cabinet inwall constitute wind outlet section, and the inlet face of wind outlet section is to the air flow in air channel, and the outlet of wind outlet section is towards the wind gap of correspondence.Cold air is sent on each server by the wind outlet section be provided with by air inlet, realizes the shunting of air-flow, and arc deflector can make mild the branching in wind gap of cold air, and can reduce noise.

Top board and forward and backward side plate intersection, base plate and forward and backward side plate intersection are equipped with arc arc-shaped transition plate 6.Arc-shaped transition plate can ventilate more smooth and easy, and can reduce noise.Back side panel is provided with exhaust outlet 5 away from one end of air inlet, and this exhaust outlet is provided with ventilating fan 4, can be expelled to outside cabinet by air-flow fast by ventilating fan.

As shown in Figure 3, refrigeration module 14 comprises a housing, evaporator 20, compressor 22, condenser 17, Throttle module (not shown in FIG.) is provided with in housing, condenser air outlet 16, condenser air inlet 18, evaporator air outlet 19, evaporator air inlet 21 is also offered in housing, evaporator comprises conduit, conduit is arc, evaporator air outlet and air inlet is connected.Insulation material layer 23 is all posted in inwall six faces of housing, and see Fig. 4, insulation material layer 23 is deadening felt or fiber board, and surface has tapered protrusion.

The noise of system mainly contains two sources, and one is the noise of refrigeration module, and another is the dynamic noise of air channel air flow, particularly larger at each corner, air inlet noise.For the noise that air flowing produces, the design in the air channel that the arc-shaped transition plate that the present invention is provided with by the wind outlet section that surrounded by arc deflector 9, cabinet inwall corner, sectional area reduce gradually, avoid air quantity in air channel and change the wind speed change brought, reduce noise from noise source; For the noise of refrigeration module, effectively reduce noise by acoustic material.

During real work, provide cold air by refrigeration module.Refrigeration module selects R134a as cold-producing medium, and cold-producing medium is compressed within the compressor, and the cold-producing medium of HTHP within the condenser condensation cooling becomes the cold-producing medium of cryogenic high pressure.Cold-producing medium, through Throttle module throttling, after temperature drops to designed cryogenic temperature, enters into evaporator evaporation endothermic, and cooling enters the air of evaporator, finally enters compressor, completes whole cyclic process.

Enter air channel from evaporator cold air out by air inlet, because the cross section in air channel evenly reduces along air flow, the air of cross section reduction part enters wind gap by wind outlet section, because cross-sectional gradient reduces, air mass flow in wind gap can be realized and speed all equal, realize cold air being uniformly distributed in cabinet, see Fig. 2, cold air cools server after entering wind gap, finally flows into exhaust outlet, is directly discharged to rack outside by ventilating fan.

Relatively effect of the present invention is further illustrated below by embodiment and comparative example.In guarantor unit's time through the air quantity of each wind gap is consistent, comparative example and comparative example are at the wind speed of each air inlet.

Consider that condensation can cause larger impact to server, by the cold-producing medium design evaporating temperature 3 DEG C in evaporator, design heat transfer temperature difference is 8 DEG C, and evaporator air outlet temperature is 11 DEG C, and this can ensure that cold air is delivered in server cabinet and not condense.

The refrigerating capacity that refrigeration module can provide for interior of equipment cabinet is 3.5Kw.

Cabinet inner air circulating treatment procedure can be regarded as and the air in cabinet is processed into O state point from N state point, and wherein, N is the air condition at gas outlet place in cabinet, and O is the air condition at air inlet place, sees Fig. 5.The parameter of each state point is as shown in table 1.

Table 1

Refrigerating capacity needed for unit mass air is:

qqH N-H o=27.69KJ/Kg

Wherein, q is expressed as the refrigerating capacity needed for unit mass air, and HN is the enthalpy of N state point, H ofor the enthalpy of O state point.

The total blast volume needed for refrigerating capacity reaching 3.5Kw is:

m = Q q = Q H N - H o = 3.5 27.69 = 0.1264 Kg / s = 0.103 m 3 / s

The wherein Q refrigerating capacity that can provide for interior of equipment cabinet for refrigeration module, m is for reaching the total blast volume needed for 3.5Kw refrigerating capacity.

The cross section in air channel is rectangle, and the width near that end of air inlet is 500mm, and thickness is 50mm, and wherein the thickness in air channel is the distance of segmented plate to outer panel, and air channel thickness reduces from down to up in gradient.The initial wind speed v in air channel 0for:

v 0 = m 0.5 × 0.05 = 4.12 m / s

Because the thickness in air channel reduces along gradient, thus cause the air of partial-flow can not enter the further part in air channel, but enter wind gap, for server cools by the wind outlet section be made up of arc deflector 9 and cabinet inwall.Wind gap number is 6, for ensureing that air flows into air quantity consistent (1/6 of total blast volume m, the i.e. 0.0172m of each wind gap 3/ s), from the bottom up in air inlet, air channel tranverse sectional thickness is followed successively by 50mm, 41.7mm, 33.4mm, 25.1mm, 16.8mm, 8.5mm.

As shown in table 2, when initial wind speed, each wind gap air quantity are consistent, each parameter comparison of embodiment and comparative example.

Table 2

Can be found by table 2, when initial velocity is consistent with each wind gap flow, the wind speed of each air inlet of comparative example can progressively reduce.And in the present invention, the wind speed of air inlet can keep original speed always, and the wind speed entering into wind gap also can keep each layer identical, air velocity is larger, enter in server gap and can deliver to farther place, air-flow evenly, and can better the heat radiation of takeaway service device.

Claims (7)

1. the high efficiency and heat radiation air-conditioning system of a rack-mount server rack, comprise refrigeration module and the cabinet with air inlet, described refrigeration module carries cold air by air inlet to cabinet, it is characterized in that, be provided with dividing plate in described cabinet, the side of this dividing plate is air channel, opposite side is the spatial accommodation for placing server, the cross section in air channel reduces along air flow gradient, and described dividing plate is placed with some air inlets along air flow, and each air inlet is equipped with arc deflector;
Evaporator in described refrigeration module, compressor and condenser are arranged in same housing, and the inwall of this housing is provided with insulation material layer;
The corner of described cabinet inwall is provided with arc-shaped transition plate.
2. the high efficiency and heat radiation air-conditioning system of rack-mount server rack according to claim 1, it is characterized in that, being placed with multiple servers in described spatial accommodation, is wind gap between adjacent two-server, and each air inlet is towards a wind gap of correspondence.
3. the high efficiency and heat radiation air-conditioning system of rack-mount server rack according to claim 2, is characterized in that, one end of described arc deflector and dividing plate tangent fixing, the other end stretches to corresponding wind gap.
4. the high efficiency and heat radiation air-conditioning system of rack-mount server rack according to claim 3, it is characterized in that, also comprise the wind outlet section be made up of described arc deflector and cabinet inwall, the inlet face of wind outlet section is to the air flow in air channel, and the outlet of wind outlet section is towards the wind gap of correspondence.
5. the high efficiency and heat radiation air-conditioning system of rack-mount server rack according to claim 1, it is characterized in that, the front, rear, left and right side plate that described cabinet comprises the top board that is parallel to each other and base plate and is connected with base plate with top board, described dividing plate closes on front side board, and described air channel is between front side board and dividing plate.
6. the high efficiency and heat radiation air-conditioning system of rack-mount server rack according to claim 5, is characterized in that, described air inlet is located on base plate or top board, and described back side panel is provided with exhaust outlet away from one end of air inlet.
7. the high efficiency and heat radiation air-conditioning system of rack-mount server rack according to claim 6, is characterized in that, described exhaust outlet is provided with ventilating fan.
CN201310651716.3A 2013-12-05 2013-12-05 The high efficiency and heat radiation air-conditioning system of rack-mount server rack CN103687446B (en)

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