CN102833988A - Data center heat dissipation scheme - Google Patents
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- CN102833988A CN102833988A CN2012103466663A CN201210346666A CN102833988A CN 102833988 A CN102833988 A CN 102833988A CN 2012103466663 A CN2012103466663 A CN 2012103466663A CN 201210346666 A CN201210346666 A CN 201210346666A CN 102833988 A CN102833988 A CN 102833988A
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Abstract
The invention discloses a data center heat dissipation scheme. A case is involved and comprises a front wall and a rear wall which are parallel to each other, a left side wall and a right side wall which are connected with the front wall and the rear wall, an upper wall and a lower wall which are perpendicular to a cabinet, and a backboard parallel to the front wall and the rear wall of the case; the backboard partitions the case into a front space and a rear space, namely a first space and a second space; the first space and the second space in the case are partitioned into a plurality of cabinets, namely equipment arrangement regions and fan chambers, by a plurality of heat exchangers arranged side by side; a server system is arranged in one of the equipment arrangement regions; the cabinets in the case, which are close to the two side walls, are the fan chambers without the backboard, and the corresponding fan chambers are arranged on the middle cabinet according to an air volume requirement; and the heat exchangers are evaporators of a multi-stage heat pipe and heat pump combined system. By the data center heat dissipation scheme, due to combination of multiple stages of heat pipe and heat pump refrigeration devices, the air supply cooling efficiency is improved, the refrigeration energy consumption is reduced, and influence of dust on the server system is avoided.
Description
Technical field
The present invention relates to a kind of data center, particularly a kind of data center heat sink conception.
Background technology
Be accompanied by rapid development of Internet, the IT application in enterprises paces are constantly accelerated.Deep change is just taking place in the application of IT resource and management mode, is the service type innovation resources of carrying platform with progressively developing into the data center from functionality resources independent, that disperse.Data center is large-scale concentrated computing facility, and it is bearing functions such as calculating, storage, application, and it will become the new focus and the core content of informatization.Arriving along with the data explosion epoch; Also had higher requirement in the data center; Stack more multiserver hardware in limited space domestic demand, it comprises a large amount of servers, and these servers are positioned over frame; Because server system is more and all be arranged at data center, the whole heat sink conception of data center becomes quite important.For the scheme that adopts the traditional mechanical refrigeration; Increase the way of cooler; Though can guarantee the fail safe of interior space cooling, the golf calorific value space is owing to need all-year-around cooling, and air conditioning energy consumption is very high; Can't fundamentally realize the energy saving in running of air-conditioning, also bring the problem of electric power and cost simultaneously.The research report of IDC points out that in the cost that hardware is dropped into, power supply and cooling device will occupy half the cost, and data center's cooling system has occupied 40% of data center's total power consumption.
Domestic conventional data centers often exists aspect physical environment: integral layout is unreasonable, and refrigerating system can not be distributed by the needs of physical device, causes overall energy waste high and have a problem of local overheating; Aspect information technoloy equipment; The statistics of IDC shows that in the Asian-Pacific area, data center server power consumption is with the speed increase in every year 23%; Compare with world's balanced growth level of annual 16%, the power consumption growth rate of Asia-Pacific data center has far exceeded world average level.
Such present situation also impels enterprise to explore better radiating mode always, and as hardware all is submerged in oil or the liquid, because hardware immerses wherein fully, oil cooling can better be derived the heat of assembly and hardware facility.Though oil cooling can provide higher radiating efficiency; And the permission server is quieter and intensive operation; But also have some problems simultaneously: (1) oil cooling mode causes the weight of hardware more much bigger than server in the general data center, and this just needs the floor can bear enough weight; (2) initial cost of installation water pump radiator and the connecting tube of necessity is very expensive; (3) hardware device that means that is immersed in fully in the oil cooling equipment will be difficult to upgrading, and this needs extra technical training.
What is more adopts Peltier to cool off the mode of (semiconductor chilling plate), also can adopt dry ice or liquid nitrogen to guarantee that they need not to worry that hardware quits work because temperature is too high when limit overclocking.In fact some the time processor cross in temperature and also can quit work when low, for example then Core 2 Extreme QX9650 spend-90 and will cut off the power supply automatically when spending-60.
The number of patent application of applicant's previous application is 201210319421.1 the energy consumption big problem of patent for existing in the solution heat pump; And provided a kind of simple in structure, implement easily, the multi-stage heat pipe heat pump hybrid systems of energy-saving and emission-reduction; According to indoor and outdoor temperature and indoor load situation; Unit is optionally with multi-stage heat pump circulation or the operation of multi-stage heat pipe circulation pattern; In the target that guarantees to have realized under the prerequisite that room temperature lowering requires energy-saving run, this multi-stage heat pipe heat pump hybrid system not only makes the heat pump refrigerating heat transfer technology of heat pipe merge each other, than the existing annual cooling scheme of various needs; Multi-stage heat pipe heat pump compound-refrigerating technology has obvious superiority ability (comprising fractional energy savings and room temperature controlling performance); Not only can realize the mutual supplement with each other's advantages of heat pipe and heat pump refrigerating technology, and can make full use of the power-saving technology of nature heat exchange, and can solve the low problem of existing single-stage heat pipe hot pump refrigerating plant the heat transfer temperature difference big and total heat exchange efficiency of loss.
Therefore seek a kind of how the input under the prerequisite with air-conditioning, ensure effective radiating effect in limited space, with the quantity that realizes rack maximize and rack in the maximized heat sink conception of quantity of server extremely urgent.
Summary of the invention
In order to solve the problems of the technologies described above; The present invention provides a kind of can provide the uniformity of cold air, the changeability of cooling amount and energy-conservation heat abstractor according to the temperature of server system radiating in the rack, and a kind of data center's heat sink conception that comprises above-mentioned heat abstractor also is provided.
Technical solution problem of the present invention adopts following technical scheme:
A kind of data center heat sink conception, the some server cabinets, heat exchanger, fan room, air-supply arrangement, damping device and the circuit controling element that comprise a cabinet, are arranged in this casing constitute; Said cabinet comprise the front and rear wall that is parallel to each other, the left and right sides wall that connects front and rear wall, vertical said cabinet last lower wall, with the parallel backboard of said cabinet front and rear wall; Said backboard is partitioned into former and later two spaces with said cabinet, is respectively first, second space; First, second space of said cabinet inside is isolated into some racks each other by some heat exchangers that are arranged side by side, and is respectively equipment rest area and fan room; Said server system is arranged in the said equipment rest area; Said air-supply arrangement and air humidifying device are placed on said fan room; Said each rack all is provided with Yishanmen; Rack near first, second space of two side in the said cabinet is the fan room that does not have backboard, both can be the server system air-supply and the humidification in first, second space, air flow that again can first, second space of conducting; Said intermediate server system area can be provided with corresponding fan room according to the air quantity demand; Said heat exchanger is the evaporator of multistage heat pipe hot pump hybrid system, and side-walls that it is installed in each group server cabinet is slit into some server apparatus rest areas and fan room to first, second spatial; Beginning in the air channel the left wall heat exchanger of first group the server system in direction first space of wind from the left side wall fan room in first space of cabinet like this discharges cold air and gets into server system; The air of the heat that server system produces gets into its right side wall heat exchanger and cools off; The air of cooling gets into next group server system; Repeating successively flows down is circulated to the right side wall sidewall fan room in first space, gets into the second space right side wall fan room then, carries out the kind of refrigeration cycle in second space; It is identical with the first space circulation pattern; The left side wall fan room that after wind is admitted to second space with first space exchange, has then just accomplished the inner loop of a sealing.
The above heat exchanger is the evaporator of multi-stage heat pipe heat pump hybrid system, and the side-walls that it is installed in each group server cabinet is slit into some server systems district and fan room to first, second spatial; The evaporator of said each group multi-stage heat pipe heat pump hybrid system is arranged side by side by the evaporator that is no less than two heat pipe hot pump recombiner units and constitutes; And the evaporator of each grade heat pipe hot pump recombiner unit has the independent input/output terminal of oneself respectively; The condenser of the heat pipe hot pump recombiner unit corresponding with it is connected; Form one by one independently partial circulating loop, they have independent compressed machine and circulating pump, are independent of each other mutually during its work operation.
The above heat exchanger is the evaporator of multi-stage heat pipe heat pump hybrid system; And the evaporator of the multi-stage heat pipe heat pump hybrid system of each group is arranged side by side by the evaporator that is no less than two heat pipe hot pump recombiner units and constitutes; It has the condenser of the heat pipe hot pump recombiner unit of own correspondence to be connected respectively; Form one by one independently heat pipe hot pump hybrid system refrigeration partial circulating, and can optionally move the intermittent work of part partial circulating unit phase trans-substitution in each group multi-stage heat pipe heat pump hybrid system according to the heat radiation needs of server system.Because the fin temperature of the evaporator of the multi-stage heat pipe heat pump hybrid system of cabinet sidewalls is lower than the temperature of flowing gas in the cabinet; Reach its dew point temperature after can making the steam of flowing gas the inside run into fin; Be condensed into liquid water, thus the humidity in the reduction cabinet that can be spontaneous.
In the middle of being set near the rack in first, second space of left and right sides wall in the above cabinet is four fan room that do not have backboard to separate; Said fan room is provided with air-supply arrangement and damping device; Said intermediate server system area can be provided with corresponding fan room according to the air quantity demand, and the dense degree of its fan room is set according to the demand of server system.
Be provided with air-supply arrangement in the above fan room; The number of the air-supply arrangement in each fan room and the size of air output are decided according to the demand of the server system between two fan room; If a plurality of server systems are arranged between the fan room; Then can increase the number of air-supply arrangement in the centre or accelerate the rotating speed of each air-supply arrangement, the cold air of the evaporator of farthest server system sidewall is sent in the space, server system place.
Be provided with damping device in the above fan room, the size of the unlatching of damping device and humidification amount is regulated through the feedback information of corresponding sniffer according to the demand of the server system of each group automatically.
The placement of each server will be along the wind direction in whole space in the above server system; Can not keep out the wind; The cross-sectional area that is server is parallel with the wind direction in the air channel; The cold air of sending into from the sidewall evaporator is got into, and the hot-air that server system sheds gets into next group evaporator along wind direction and cools off.
Segment space is left in the top and the bottom of above-described cabinet, supplies the pipeline such as feed tube, power line, holding wire of refrigeration working medium turnover evaporator and the placement of circuit.
The above circuit control section is being controlled the circuit logic computing and the equipment operation switch of whole device; Mainly be some variations in temperature of monitoring hot environment and low temperature environment through some temperature testing equipments; Optionally move multi-stage heat pump refrigeration work pattern or multi-stage heat pipe refrigeration work pattern; And can avoid the situation of " low load with strong power " as required; Selection makes the intermittent work of part unit phase trans-substitution of heat pump refrigerating mode of operation or heat-pipe refrigerating mode of operation, has also prolonged the useful life of whole system so to a certain extent.
The present invention compared with prior art; To use with the evaporator of multi-stage heat pipe heat pump hybrid system sidewall as rack in the cabinet; Make server system in each rack all have one can provide supply cold wind device and one of different cold blast rates to draw the shed device of the hot blast that comes of server system according to radiating requirements; Promptly can fix a point provides uniform refrigerating gas to server system in the rack; So just guarantee the abundance and the preference temperature of refrigerating gas in each rack, got rid of the interference of extraneous mist.Multi-stage heat pipe heat pump compound-refrigerating technology has obvious superiority ability (comprising fractional energy savings and room temperature controlling performance); Not only can realize the mutual supplement with each other's advantages of heat pipe and heat pump refrigerating technology; Can realize heat pipe and two kinds of patterns of heat pump refrigerating with same set of equipment; The power-saving technology of nature heat exchange can not only be made full use of, and the low problem of existing single-stage heat pipe hot pump refrigerating plant the heat transfer temperature difference big and total heat exchange efficiency of loss can be solved.When winter, outdoor temperature was low, hybrid system generally ran on the heat pipe pattern, and compressor is in stopped status always, and energy-saving effect is best; In transition season, because outdoor temperature is higher, the cooling ability of heat pipe reduces, and unit generally is in the alternate run pattern of heat pump and heat pipe, and energy-saving effect is more remarkable; When summer, outdoor temperature was higher, unit generally ran on heat pump mode, but also can operate in the alternate run pattern of heat pump and heat pipe at night and rainy weather, still had good energy-saving effect.Therefore this data center heat sink conception has improved the air-supply cooling effectiveness through the fusion of multi-stage heat pipe heat pump refrigerating device; Reduced energy consumption for cooling; Not only can satisfy the demand of data center inside to refrigeration; And avoided the influence of dust to server system, the whole proposal simplicity of design is reasonable, floor space is little, utilance is high, easy to use.
Description of drawings
Fig. 1 is the cabinet inside space segmentation sketch of data center of the present invention heat sink conception.
Fig. 2 is the cabinet inside structural perspective for this reason.
Fig. 3 is cabinet inside structural upright curve planing surface figure for this reason.
Fig. 4 is the rack execution mode figure of data center's heat sink conception for this reason.
Fig. 5 is the inside and outside heat exchanger linked, diagram of single rack in the cabinet for this reason.
Among the figure: (1) cabinet; (2) backboard; (3) first spaces; (4) second spaces; (5) evaporator of multi-stage heat pipe heat pump hybrid system; (6) fan room; (7) canyon; (8) air supply device; (9) damping device; (10) cabinet door.
Embodiment:
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is carried out detailed description:
A kind of data center heat sink conception; Comprise evaporator (5), fan room (6), canyon (7), air supply device (8), damping device (9), cabinet door (10) and the circuit controling element of cabinet (1), backboard (2), first space (3), second space (4), multi-stage heat pipe heat pump hybrid system, whole system can be made the cabinet that comprises N rack as required;
Fig. 1 is the cabinet inside space segmentation sketch of data center of the present invention heat sink conception.This cabinet (1) comprises the front and rear wall that is parallel to each other, the left and right sides wall that connects front and rear wall, the last lower wall of vertical said cabinet, the backboard (2) parallel with said cabinet front and rear wall; Said backboard (2) is partitioned into former and later two spaces with said cabinet (1); Be respectively first space (3) and second space (4), and leave the conducting district that a passage is first space (3) and second space (4) between the left and right sides sidewall of this backboard (2) and cabinet; The air of whole like this cabinet inside is done the one-period circulation around backboard (2).
Fig. 2 is the cabinet inside structural perspective for this reason.On the basis of Fig. 1, make first space (3) of cabinet inside, second space (4) are isolated into some racks each other by some heat exchangers that are arranged side by side (5), be respectively equipment rest area (7) and fan room (6); This heat exchanger (5) is the evaporator of multistage heat pipe hot pump hybrid system; Can select to make the intermittent work of part unit phase trans-substitution of heat pump refrigerating mode of operation or heat-pipe refrigerating mode of operation according to the demand of load; Can prolong the useful life of heat exchanger like this, improve integrally cooling efficient.Said server system is arranged in the equipment rest area (7), and air-supply arrangement (8) and air humidifying device (9) are placed on fan room (6), and each rack all is provided with Yishanmen (10), requires interior first, second space (3 near the two side of cabinet; 4) not having the rack of backboard is four fan room, and the intermediate server system area can be provided with corresponding fan room (6) according to the air quantity demand in the cabinet, to guarantee server system area in each rack the air quantity gas of capacity is arranged.
Fig. 4 is the rack execution mode figure of data center's heat sink conception for this reason.During this data center line heat sink conception work; Multi-stage heat pipe heat pump hybrid system can be according to the difference of indoor required design temperature and outdoor temperature; Optionally move multi-stage heat pump refrigeration work pattern or multi-stage heat pipe refrigeration work pattern, it all is the same that each mode of operation makes cabinet inside radiating principle and air flow.For Fig. 4 inner loop as figure shown in; Begin the direction of wind in the air channel from the left side wall fan room in first space of cabinet, the heat exchanger of the left side wall of first group the server system in first space discharges cold air and gets into server system, and the air of the heat that server system produces gets into its right side wall heat exchanger and cools off; The air of cooling gets into next group server system; Repeating successively flows down is circulated to the right side wall fan room in first space, gets into the second space right side wall fan room then, carries out the kind of refrigeration cycle in second space; It is identical with the first space circulation pattern; The left side wall fan room that after wind is admitted to second space with first space exchange, has then just accomplished the inner loop of a sealing.
Fig. 5 is the inside and outside heat exchanger linked, diagram of single rack in the cabinet for this reason.When whole system is worked; Evaporator (5) in the cabinet contacts with the high temperature heat source that server system gives out; Liquid working media receives the heating of high temperature heat source and is evaporated to gas in evaporator, and absorbs heat, and the gas of evaporation formation does not have the evaporated liquid intermediate medium in flow at high speed, to mix formation gas-liquid two-phase flow body each other with part; They are exported from evaporator (5) through intermediate equipment and get into condenser (11); Condenser (11) contacts with low-temperature heat source, and gaseous working medium receives the cooling of low-temperature heat source and is condensed into liquid in condenser, and emits heat; The liquid-working-medium that condensation forms circulates through the intermediate equipment entering evaporator (11) of condenser output and evaporator input next time, and whole like this heat-exchange system circulates down always.
This like this multi-stage heat pipe heat pump compound-refrigerating technology has obvious superiority ability (comprising fractional energy savings and room temperature controlling performance); Not only can realize the mutual supplement with each other's advantages of heat pipe and heat pump refrigerating technology; Can realize heat pipe and two kinds of patterns of heat pump refrigerating with same set of equipment; The power-saving technology of nature heat exchange can not only be made full use of, and the low problem of existing single-stage heat pipe hot pump refrigerating plant the heat transfer temperature difference big and total heat exchange efficiency of loss can be solved; This system can optionally move multi-stage heat pump refrigeration work pattern or multi-stage heat pipe refrigeration work pattern according to the difference of indoor required design temperature and outdoor temperature, is guaranteeing that the prerequisite that room temperature lowering requires is issued to energy-saving run; When higher or indoor load is excessive when outdoor temperature; Multi-stage heat pipe heat pump hybrid system operating heat pump refrigeration work pattern; Operation principle is identical with general frequency conversion or non-frequency air-conditioning; Indoor heat is dissipated to the exterior space through vapor-compression refrigerant cycle, reaches the cooling cooling effect of the interior space; When outdoor temperature is lower than the indoor temperature certain value; Compressor bank is closed; Unit gets into the heat-pipe refrigerating mode of operation automatically, brings to condensation heat release in the condenser to gaseous refrigerant through the heat pipe energy-saving module, becomes condensate liquid at last; Condensate liquid flow to evaporator again and absorbs heat under the effect of heat pipe energy-saving module, whole system through the heat pipe energy-saving module with indoor heat to outdoor transmission.
Claims (7)
1. data center's heat sink conception comprises a cabinet (1), is arranged at some server cabinets and a heat abstractor in this casing, it is characterized in that, also comprises heat exchanger (5) and fan room (6); Said cabinet comprises the front and rear wall that is parallel to each other, the left and right sides wall that connects front and rear wall, the last lower wall of vertical said cabinet, the backboard (2) parallel with said cabinet front and rear wall; Said backboard is partitioned into former and later two spaces with said cabinet, is respectively first space (3) and second space (4); First space (3), second space (4) of said cabinet inside are isolated into some racks each other by some heat exchangers that are arranged side by side (5), are respectively equipment rest area (7) and fan room (6); Said server system is arranged in the said equipment rest area (7); Said air-supply arrangement (8) and air humidifying device (9) are placed on said fan room (6); Said each rack all is provided with Yishanmen (10); Interior first, second space (3 of said cabinet near the two side; 4) rack is the fan room that does not have backboard, both can be the server system air-supply and the humidification in first, second space, air flow that again can first, second space of conducting; Said intermediate server system area can be provided with corresponding fan room (6) according to the air quantity demand; Said heat exchanger (5) is the evaporator of multistage heat pipe hot pump hybrid system, and it is installed in side-walls of each group server cabinet, first, second space (3; 4) be divided into some server apparatus rest areas (7) and fan room (6); Begin the direction of wind in the air channel like this from the left side wall fan room in first space of cabinet; The heat exchanger of the left side wall of first group the server system in first space discharges cold air and gets into server system; The air of the heat that server system produces gets into its right side wall heat exchanger and cools off, and the air of cooling gets into next group server system, and repeating successively flows down is circulated to the right side wall fan room in first space; Get into the second space right side wall fan room then; Carry out the kind of refrigeration cycle in second space, it is identical with the first space circulation pattern, and after wind is admitted to the left side wall fan room in second space; With first space exchange, then just accomplished the inner loop of a sealing.
2. a kind of data center according to claim 1 heat sink conception; It is characterized in that; Said heat exchanger (5) is the evaporator of multi-stage heat pipe heat pump hybrid system; The side-walls that it is installed in each group server cabinet is slit into some server systems district and fan room to first, second spatial; The evaporator of said each group multi-stage heat pipe heat pump hybrid system is arranged side by side by the evaporator that is no less than two heat pipe hot pump recombiner units and constitutes; And the evaporator of each grade heat pipe hot pump recombiner unit has the independent input/output terminal of oneself respectively; The condenser of the heat pipe hot pump recombiner unit corresponding with it is connected; Form one by one independently partial circulating loop, they have independent compressed machine and circulating pump, are independent of each other mutually during its work operation.
3. according to claim 1 and 2 described a kind of data center heat sink conceptions; It is characterized in that; Said heat exchanger (5) is the evaporator of multi-stage heat pipe heat pump hybrid system; And the evaporator of the multi-stage heat pipe heat pump hybrid system of each group is arranged side by side by the evaporator that is no less than two heat pipe hot pump recombiner units and constitutes, and it has the condenser of the heat pipe hot pump recombiner unit of own correspondence to be connected respectively, forms one by one independently heat pipe hot pump hybrid system refrigeration partial circulating; The combination that can optionally move arbitrarily small cycling element in each group multi-stage heat pipe heat pump hybrid system like this according to the heat radiation needs of server system comes work.
4. a kind of data center according to claim 1 heat sink conception is characterized in that, is four fan room that do not have backboard to separate in the middle of being set near the rack in first, second space of left and right sides wall in the said cabinet; Said fan room is provided with air-supply arrangement and damping device; Said intermediate server system area can be provided with corresponding fan room according to the air quantity demand, and the dense degree of its fan room is set according to the demand of server system.
5. according to claim 1 and 4 described a kind of data center heat sink conceptions; It is characterized in that; Be provided with air-supply arrangement (8) in the said fan room; The number of the air-supply arrangement in each fan room and the size of air output are decided according to the demand of the server system between two fan room; If a plurality of server systems are arranged between the fan room, then can increase the number of air-supply arrangement in the centre or accelerate the rotating speed of each air-supply arrangement, the cold air of the evaporator of farthest server system sidewall is sent in the space, server system place.
6. according to claim 1 and 4 described a kind of data center heat sink conceptions; It is characterized in that; Be provided with damping device (9) in the said fan room, the size of the unlatching of damping device and humidification amount is regulated through the feedback information of corresponding sniffer according to the demand of the server system of each group automatically.
7. a kind of data center according to claim 1 heat sink conception; It is characterized in that; The placement of each server will be in the minimum state that keeps out the wind in the said server system; The largest face of cross-sectional area that is server is parallel with the wind direction in the air channel, and the cold air of sending into from the sidewall evaporator is got into, and the hot-air that server system sheds gets into next group evaporator along wind direction and cools off.
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| CN111173326A (en) * | 2020-01-12 | 2020-05-19 | 苏州浪潮智能科技有限公司 | Multistage refrigerated data center computer lab |
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| CN114020076A (en) * | 2021-10-29 | 2022-02-08 | 国网江苏省电力有限公司苏州供电分公司 | Intelligent temperature control meter box based on ubiquitous power Internet of things |
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| CN103118522B (en) * | 2013-01-31 | 2016-07-06 | 北京德能恒信科技有限公司 | A kind of data center heat dissipation system |
| CN103179847A (en) * | 2013-03-12 | 2013-06-26 | 北京德能恒信科技有限公司 | Data center cooling system |
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| CN110213943B (en) * | 2019-06-03 | 2020-06-19 | 北京纳源丰科技发展有限公司 | Multistage cooling heat pipe economizer system of server rack |
| CN111173326A (en) * | 2020-01-12 | 2020-05-19 | 苏州浪潮智能科技有限公司 | Multistage refrigerated data center computer lab |
| CN111182771A (en) * | 2020-01-20 | 2020-05-19 | 无锡赛思亿电气科技有限公司 | Heat dissipation system of high-power combined electrical cabinet and control method thereof |
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| CN111787773B (en) * | 2020-08-03 | 2022-05-24 | 北京国电恒嘉科技产业集团有限公司 | Fully-prefabricated modular edge data center system |
| CN114020076A (en) * | 2021-10-29 | 2022-02-08 | 国网江苏省电力有限公司苏州供电分公司 | Intelligent temperature control meter box based on ubiquitous power Internet of things |
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