CN101072491A - Straight-air radiating device and its control method - Google Patents
Straight-air radiating device and its control method Download PDFInfo
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- CN101072491A CN101072491A CNA2007101227440A CN200710122744A CN101072491A CN 101072491 A CN101072491 A CN 101072491A CN A2007101227440 A CNA2007101227440 A CN A2007101227440A CN 200710122744 A CN200710122744 A CN 200710122744A CN 101072491 A CN101072491 A CN 101072491A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
- H05K7/20618—Air circulating in different modes under control of air guidance flaps
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
- H05K7/207—Thermal management, e.g. cabinet temperature control
Abstract
The heat sink includes following parts: cabinet; insertion frame for equipment setup at central area of the cabinet; both of first air inlet and first air outlet positioned at first side of the cabinet; being setup at gap between first side of the cabinet and insertion frame for equipment, the shield plate is in use for obstructing connection at the gap between first air inlet and first air outlet; being connecting first air inlet and first air outlet, first air channel is formed from gaps between other three side surfaces of the cabinet and insertion frame for equipment. The invention also discloses method for controlling the heat sink in type of conduction through. Features are: reasonable overall arrangement for air channel, and no reversed-flow region.
Description
Technical field
The present invention relates to the electronic communication field, relate in particular to straight-air radiating device and control method thereof.
Background technology
Along with the diversification of the market demand, more and more higher to the functional requirement of outdoor equipment in every profession and trades such as chemical industry, HVAC, machinery, communication, cause the allocating power of equipment also to increase thereupon.Yet the equipment electric energy that the overwhelming majority consumes in running can be converted into heat energy, and the overheated meeting of equipment causes the decline of equipment performance so that cause damage.In order to ensure the operate as normal of equipment, must allow the residing temperature of equipment within allowed band, press for the heat dissipation problem in the solution equipment.The product miniaturization is the trend place in current market, the more heat that leaves in littler space, and surging heat-sinking capability has become one of core competitiveness of outdoor equipment.
At present, common temperature control scheme is that temperature conditioning unit is installed in equipment, and general temperature conditioning unit has: heat exchanger and air-conditioning.Realize because heat exchanger and air-conditioning heat transfer mechanism are the inside and outside circulations by two sealings, therefore device interior and external environment are isolated into two systems fully, the protective capacities of good dust, salt etc. is arranged.Air themperature when adopting heat exchanger in the equipment can be higher than external environment all the time, the ability of the high ambient temperature that has reduced so not only that equipment interior device can bear, and heat transfer temperature difference reduce make Energy Efficiency Ratio not high.The shortcoming of air-conditioning is that reliability is low, and needs to consume a large amount of electric energy, operating cost height.In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:
Use these two kinds of common temperature conditioning units to solve the scheme of equipment cooling, the shortcoming that has jointly is that they need for example heat exchange unit of supplementary equipment therefore, cooling device, and this makes, and the entire equipment maintenance cost increases, weight increases, total energy consumption increases.Therefore, temperature conditioning unit can take very big volume, increases the load-carrying of equipment, and the maintainability of equipment is poor, changes difficulty, and noise problem is outstanding, runs counter to device miniaturization, cost performance height, energy-conservation design concept.
All unfavorable based on temperature control scheme commonly used, industry bring into use a kind of with the external environment air directly introducing equipment solve scheme--the direct ventilation heat sink conception of heat radiation.In realizing process of the present invention, the inventor finds:
The use of direct ventilation heat sink conception has increased heat transfer temperature difference greatly, uses the littler systematic air flow more heat that leaves, and has its unique practicality, at communication apparatus business-like case has been arranged, and has caused numerous equipment suppliers' concern.The direct ventilation heat sink conception is compared with the heat exchanger scheme, can abatement apparatus inside and environment between extra temperature gradient, help heat radiation; Compare with the air-conditioning scheme, the energy that cooling system consumes is minimum, cuts operating costs.The direct ventilation heat sink conception can reduce noise of equipment, reduces volume, the weight of equipment, makes equipment compact more, and the cost of cooling system reaches minimum.Yet the direct ventilation heat sink conception still is faced with many application problems: the response time of the preventing dust of the optimization of matching of heat radiation air quantity and device temperature, equipment, waterproof and cold start-up etc.
The application problem that relates to more than facing, a kind of settling mode in the correlation technique are the temperature control system of a suitable direct ventilation heat radiation of design and the air channel of coupling, and Fig. 1 shows the structure in this air channel.Utilize special-purpose air channel, front and back, go up lower air duct, solve temperature control problem and part heat dissipation problem, and increase dustproof facilities, solve dirt problems.In the middle of this method, make full use of the direct cooling device of external environment air, under the prerequisite that satisfies heat radiation, reduced the air quantity of system, reach the purpose that reduces noise.
In this direct ventilation heat dissipation technology scheme, air channel before and after equipment uses, equipment by ventilated membrane 1 prevent dust, waterproof, air inlet 2 place's mounted fan 3 are bled, and the whole system air quantity is provided.The control of the rotating speed of fan mainly is that the air themperature TEXH by air outlet determines that setting two temperature value Tm, Th such as Fig. 2 are represented in the rotation speed of the fan controlling schemes:
1. as the air themperature TEXH≤Tm of air outlet, fan keeps minimum speed;
2. as the air themperature Tm＜TEXH＜Th of air outlet, the rotating speed of fan is with air-out
The linear variation of air themperature of mouth;
3. as the air themperature TEXH＞Th of air outlet, fan keeps changeing at full speed.
In this scheme, settled two temperature sensors at air inlet 2, air outlet 6 places, report three heaters 8 of temperature T in, Tout control by it, carry out cold start-up, its temperature control mode as shown in Figure 3: whole cold start-up must be guaranteed Tout＜10 ℃.
1. when Tin＜0 ℃ and Tout＜10 ℃, open a heater;
2. when Tin＜-10 ℃ and Tout＜10 ℃, open two heaters;
3. when Tin＜-25 ℃ and Tout＜10 ℃, open three heaters;
4. air inlet 2 uses air door control, has shortened heating time effectively, has reduced the response time of cold start-up.
In this technical scheme; the shortcoming that exists recirculating zone 7 can cause the air intake drag losses to increase, in the heat radiation process, the speed governing employing of fan and air outlet temperature sensor report temperature T out Linear Control; this does not help the protection of fan, shortens the useful life of fan.The shortcoming that the needed rotating speed of fan increases.
Summary of the invention
The embodiment of the invention provides a kind of straight-air radiating device and control method thereof, can solve the problem that the air channel design in the related art scheme exists the recirculating zone to cause windage to increase.
One embodiment of the present of invention provide a kind of straight-air radiating device, comprising: rack (16); Equipment interpolation frame (15) is arranged on the middle section of rack (16); First air inlet (3,6) and first air outlet (10), it all is positioned at first side of rack (16); Deep bead (14), it is arranged on first side of rack (16) and the gap between the equipment interpolation frame (15), cuts off first air inlet (3,6) and first air outlet (10) being communicated with at this gap location; First air channel (19), it connects first air inlet (3,6) and first air outlet (10), is formed by the gap between other three sides that are positioned at rack (16) and the equipment interpolation frame (15).
Another embodiment of the present invention of the present invention provides a kind of control method of straight-air radiating device, may further comprise the steps: the ambient temperature outside the leaving air temp in the air outlet of measurement straight-air radiating device and the air inlet of straight-air radiating device; Calculate the temperature difference between leaving air temp and the ambient temperature; And the rotating speed of controlling the fan that is used to form radiating airflow in the straight-air radiating device according to the temperature difference.
Another embodiment of the present invention of the present invention provides a kind of control method of straight-air radiating device, may further comprise the steps: the inlet temperature in the air inlet of measurement straight-air radiating device; According to the temperature difference control air inlet of inlet temperature and ambient temperature and the air door of air outlet; And the work of controlling the heater strip that is used for cold-starting in the straight-air radiating device according to inlet temperature.
Another embodiment of the present invention of the present invention provides a kind of control method of straight-air radiating device, have ventilated membrane before the air inlet of straight-air radiating device, may further comprise the steps: measure the air intake pressure of air intake surface of ventilated membrane and ventilated membrane outlet air surface go out wind pressure; Calculate air intake pressure and go out pressure reduction between the wind pressure; And according to the user mode of pressure reduction measuring and calculating ventilated membrane to determine whether to change ventilated membrane.
In the technique scheme, the back of first air channel (19) slave unit interpolation frame is walked around, and the inside of second air channel (20,21) slave unit interpolation frame is passed, thus there is not recirculation zone in the design of air channel, relatively rationally.
In addition, the control method that provides in the technique scheme is controlled the rotating speed of fan according to the temperature difference, makes the service efficiency of fan higher.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the structure chart according to the straight-air radiating device of correlation technique;
Fig. 2 shows the control curve chart according to the rotation speed of the fan of correlation technique;
Fig. 3 shows the structure chart according to the straight-air radiating device of the embodiment of the invention;
Fig. 4 shows the structure chart according to another straight-air radiating device of the embodiment of the invention;
Fig. 5 shows the structure chart according to the another straight-air radiating device of the embodiment of the invention;
Fig. 6 shows the generalized section according to the double-deck orifice plate of the embodiment of the invention;
Fig. 7 shows the flow chart according to the control method of the straight-air radiating device of the embodiment of the invention;
Fig. 8 shows the temperature control curve figure according to the fan speed-regulating deltT of the embodiment of the invention;
Fig. 9 shows the heater starting control curve chart according to the embodiment of the invention;
Figure 10 shows the air door control curve chart according to the embodiment of the invention;
Figure 11 shows the ventilated membrane pressure differential detection curve chart according to the embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 3 shows the structure chart according to the straight-air radiating device of the embodiment of the invention, comprising: rack 16; Equipment interpolation frame 15 is arranged on the middle section of rack 16; First air inlet 3 or 6 and first air outlet 10 all are positioned at first side of rack 16; Deep bead 14, it is arranged on first side of rack 16 and the gap between the equipment interpolation frame 15, cuts off first air inlet 3,6 and first air outlet 10 being communicated with at this gap location; First air channel 19, it connects first air inlet 3,6 and first air outlet 10, by forming in other three sides of rack 16 and the gap between the equipment interpolation frame 15.
This embodiment has optimized the air channel design, uses upper and lower air channel to eliminate recirculating zone among correlation technique Fig. 1, to realize that resistance is as far as possible little, can allow the power of fan reduce like this, plays effect energy-conservation, noise reduction.This makes system under identical heat dissipation capacity, and it is minimum that the needed air quantity of system itself reaches.
Can there be multiple implementation in first air channel 19.Among the embodiment shown in the figure, first air inlet has two openings 3 and 6, yet in other embodiments of the invention, opening can be one or more than two.The open amount of first air outlet is unrestricted equally.
In addition, equipment interpolation frame 15 can be a plurality of, and also gapped each other, these gaps can ventilate, and as the branch in first air channel 19, is used for the effect of cross-ventilation around equipment interpolation frame 15.
In addition, first air inlet, 3,6 places can be provided with fan 4,5, to promote air flows.
Fig. 4 shows the structure chart according to another straight-air radiating device of the embodiment of the invention.Increased second air channel 20 newly with respect to Fig. 3 in this embodiment, specifically, having comprised: second air inlet 21 is positioned at the position of equipment interpolation frame 15 near first air inlet 3,6; Second air outlet 22 is positioned at the position of equipment interpolation frame 15 near first air outlet 3,6; Second air channel 20, it connects second air inlet 21 and second air outlet 22, passes the inside of equipment interpolation frame 15.Owing to increased by second air channel 20, so strengthened radiating effect.Second air inlet 21 can be same air inlet with first air inlet, and second air outlet and first air outlet also can be same air outlet; Second air channel 20 and first air channel can be interconnected, and being connected the place can be at the bottom or the top of rack, also can be up and down between two adjacent equipment interpolation frames.
In at least one that can be in first air outlet 10, second air inlet 20,21 and second air outlet 22 fan is set, this helps quickening air flows, strengthens radiating effect.
Fig. 5 shows the structure chart according to the another straight-air radiating device of the embodiment of the invention.
As shown in Figure 5, fan tray 9 can be set in second channel, and fan is set, this can be used for quickening the air flows in second air channel 20,21.
As shown in the figure, also can comprise: heater 7,8, it is positioned at fan 4,5 next doors, and this can be used for the cold-starting of equipment.Air inlet 3,6 can be a plurality of air inlets, has fan separately, and each fan next door is provided with heater, and this can quicken heating process.
As shown in Figure 5, first air inlet, 3,6 front sides can be provided with ventilated membrane 1, are used for blocks dust.Air inlet 3,6 can be near the middle part of ventilated membrane 1, better effects if like this.As shown in the figure, ventilated membrane 1 can be positioned at an edge regions of air inlet 3,6 residing sides of straight-air radiating device, and air outlet 10 can be in and this edge regions another zone side by side, does not influence air-out like this.
As shown in Figure 5, double-deck orifice plate 2 can also be set before ventilated membrane 1, it comprises a pair of mutual plate towards parallel dislocation perforate.Though that ventilated membrane self has is dustproof, the ability of waterproof, but in order to improve the reliability of equipment, can make outside air pass behind the ventilated membrane double-deck orifice plate 2 through a dislocation perforate, its generalized section is as shown in Figure 6: bulky grain objects such as the dust that outside air carries, aqueous vapor begin precipitation in double-deck orifice plate module, strengthen the equipment protection ability, improved the reliability of cooling system.
At least one also can have air door first air inlet 3,6, first air outlet 10, second air inlet 20,21 and second air outlet 22, as shown in the figure, air inlet 3,6 and air outlet 10, opening 21,20 have air door, and this is used in automatic open close in the straight-air radiating device cold-starting process.Air door is provided with and is beneficial to control heating process, and concrete control method will be described below.
The operational environment complexity of outdoor equipment, high temperature can reach 45～55 ℃, device in the equipment need just can be guaranteed performance in normal working temperature, solved the high temperature heat dissipation problem well at embodiment shown in Figure 5: outside air is by centrifugal fan 4, the 5 suction equipment at air inlet place, air at first enters ventilated membrane, and dustproof, waterproof effect that ventilated membrane has is in order to improve the reliability of protection, air needs after by ventilated membrane to play more effective waterproof action through double-deck orifice plate 2.Air by band air door air inlet 3,6 access arrangements is divided into three part access arrangement interpolation frames 15: the direct slave unit interpolation frame of portion of air 15 fronts enter, portion of air is entered by equipment interpolation frame 15 bottoms, some air is flow through by the back of equipment interpolation frame, in order to prevent that the air in the equipment interpolation frame 15 from producing backflow phenomenon and causing local radiating effect sharply to descend, and increases the heat-sinking capability that fan tray 9 strengthens equipment at the interpolation frame middle part.The air that is come out by the equipment interpolation frame is by air outlet 10 device for transferring, in order to prevent to come out hot air reflow to the air inlet of equipment interpolation frame 15 by equipment interpolation frame 15, uses deep bead 14 to isolate into and out of the air port runner.
As shown in the figure, also can comprise: temperature sensor 11,12,13, it is arranged in position, following at least one place: before air inlet 3,6, air outlet 10 and the ventilated membrane 1, it can be used for measuring the temperature of this position.Can use the temperature of these positions to control rotation speed of the fan.
Fig. 7 shows the flow chart according to the control method of the straight-air radiating device of the embodiment of the invention, may further comprise the steps:
Step S10, the ambient temperature outside the leaving air temp in the air outlet of measurement straight-air radiating device and the air inlet of straight-air radiating device;
Step S20 calculates the temperature difference between leaving air temp and the ambient temperature; And
Step S30 controls the rotating speed of the fan that is used to form radiating airflow in the straight-air radiating device according to the temperature difference.
Measure leaving air temp and ambient temperature by in air outlet and outside the air inlet, temperature sensor being set respectively.Use the leaving air temp T in the air outlet
ExternalWith the ambient temperature T outside the air inlet
AmbientTemperature difference deltT control benchmark as fan speed-regulating, the air quantity of entire heat dissipation system is by the fan speed-regulating control at two air inlet places, not only can make equipment under extraneous environmental change, system provides minimum air quantity to guarantee to satisfy the heat radiation requirement constantly, and can prolong the useful life of fan.Above-mentioned control method can be applied to various straight-air radiating devices, for example, can be applied to the straight-air radiating device shown in Fig. 1,3,4,5.To adopt straight-air radiating device shown in Figure 5 to be illustrated below, but the low-temperature starting control method that this embodiment provided is not limited to straight-air radiating device shown in Figure 5.
Fig. 8 shows the temperature control curve figure according to the fan speed-regulating deltT of the embodiment of the invention, and wherein abscissa is represented ambient temperature T
Ambient, ordinate is represented leaving air temp T
InternalOr both temperature difference deltT, wherein: deltT=T
Internal-T
Ambient
The temperature difference that adopts leaving air temp and ambient temperature is the speed governing strategy that datum mark is set fan.
In above-mentioned control method, the speed governing strategy comprises: when judging leaving air temp greater than ambient temperature, fan increases predetermined rotating speed; When judging leaving air temp less than ambient temperature, fan reduces predetermined rotating speed; Constantly adjust, equal ambient temperature up to leaving air temp.In the heat radiation process, the rotating speed of fan adopts leaving air temp T
InternalWith ambient temperature T
AmbientTemperature difference deltT be that datum mark is set, specifically comprise: with ambient temperature T
AmbientIn the change procedure, the change curve of deltT uses the PID controller to control, and this controller is constantly regulated rotation speed of the fan up to the air outlet temperature T
InternalReach set point T, make precision improve a lot like this.A PID controller has 10 control point I
n, as shown in Figure 8: each control point I
nThe fan control strategy difference of following PID can provide minimum air quantity according to radiating requirements, has fully mated the rotating speed of fan.
So not only can increase the useful life of fan greatly, and solve the accurately problem of control of ventilation quantity, solution is obtained the little ventilation of trying one's best and is satisfied the equipment cooling demand and can reduce the dust that enters rack, the useful life of prolongation ventilated membrane.
Can measure the inlet temperature in the air inlet of straight-air radiating device; According to the temperature difference control air inlet of inlet temperature and ambient temperature and the air door of air outlet; And the work of controlling the heater strip that is used for cold-starting in the straight-air radiating device according to inlet temperature.The embodiment of the invention provides a kind of control method of cold-starting, is described in detail below.
As the ambient temperature T that records by temperature sensor 11
AmbientCold-starting temperature spot T greater than apparatus settings
1When (for example, 10 ℃), the air door in air inlet 3, air inlet 6,10 3 air ports of air outlet all keeps initial opening, as the ambient temperature T that is recorded by temperature sensor 11
AmbientCold-starting temperature spot T less than apparatus settings
1When (10 ℃), the air door in air inlet 3, air inlet 6,10 3 air ports of air outlet is closed.Fan tray is started working, air is by air port, front, the bottom tuyeres access arrangement interpolation frame 15 of equipment interpolation frame 15 in the rack 16, and form the closed-loop path with the fan tray of inside, significantly reduced the response time of cold start-up, in addition, the air door of air outlet 10 is closed the air that causes the air outlet zone and produce to be refluxed, so the air outlet temperature T that records of the temperature sensor 13 of air outlet
InternalMore near the internal temperature of equipment interpolation frame 15, reduced with equipment interpolation frame 15 in the temperature difference of device start-up temperature, so also just strengthened the reliability of cold start-up.
Obviously, adopt above-mentioned method, when ambient temperature is lower than cold-starting temperature spot T
1, for example reach-30 ℃～-40 ℃, even during lower temperature, above-mentioned method heats by cold-starting, air heat to 5 ℃～10 ℃ of ability are guaranteed rack internal unit reliably workings.
Fig. 9 shows the heater starting control curve chart according to the embodiment of the invention.In the cold-starting process, in order to reduce the consumed power of heater, heater starting control adopts the air outlet temperature sensor to report temperature T
InternalAs the control point.There are two heaters in the entire heat dissipation system: Heat 1#7 and Heat 2#, it controls curve as shown in the figure: when the air outlet temperature T
InternalReach H
1When (for example, 5 ℃), Heat1# starts automatically, if the air outlet temperature T
InternalRising H
D(for example, 5 ℃), then Heat1# closes automatically; If air outlet temperature T
InternalStill continue to descend, up to H
2(10 ℃), Heat2# starts automatically, after Heat2# starts, air outlet temperature rising H
DAfter, Heat2# will close automatically.
Settle air door at air intake, air outlet place, can make equipment in the cold-starting process, automatic open close forms inner closed circulation and realizes shortening the device start time.The control mode of air door and the control mode of fan speed-regulating are somewhat similar, also be to adopt the deltT control mode, but the datum mark of air door control are according to the inlet temperature T in the air inlet
SupplyWith ambient temperature T
AmbientTemperature difference deltT
SupplySet.
Figure 10 shows the air door control curve chart according to the embodiment of the invention.As ambient temperature T
AmbientWhen reaching K1 (for example, 20 ℃), air door is controlled inlet temperature T by the anglec of rotation
SupplyWith ambient temperature T
AmbientTemperature difference deltT keep 10 ℃ of temperature difference; As ambient temperature T
AmbientWhen reaching K2 (for example, 40 ℃), air door is all opened, and is predetermined value to keep temperature difference deltT, and for example 1～2 ℃, that is, the temperature difference was probably between 1～2 ℃ after air passed ventilated membrane.As outside air temperature T
AmbientWhen taking place to rise suddenly, the temperature T of equipment air inlet appears
Supply＜ambient temperature T
AmbientPhenomenon the time, close air door immediately.Such as rising to 70 ℃ suddenly from 40 ℃, air door can be closed immediately, and this has also just played the high temperature protection effect to equipment.Simultaneously, after air door is closed, because the air channel is closed air channel in the equipment, the temperature T of air inlet
SupplyTo continue to rise, be 1～2 ℃ owing to will keep temperature difference deltT, so when intake air temperature rose to 72 ℃, air door will be opened.
The embodiment of the invention also provides a kind of control method of changing ventilated membrane, is described in detail below.As shown in Figure 5, straight-air radiating device also can comprise: pressure sensor 17,18, it lays respectively at before the ventilated membrane 1 and afterwards, it is used to measure the pressure of this position.
Figure 11 shows the ventilated membrane pressure differential detection curve chart according to the embodiment of the invention.The initial resistance of ventilated membrane when brand-new is after use 2 months, because pressure reduction increases before and after the ventilated membrane that the laying dust phenomenon on surface causes, in Figure 11, be embodied in the angular deflection of differential pressure curve (differential pressure curve of ventilated membrane is zeroaxial oblique line), when that is to say that working as the pressure reduction of being surveyed surpasses default end of a period pressure reduction (the end of a period pressure reduction of ventilated membrane is to determine by the required minimum air quantity of system radiating), just think that ventilated membrane needs to change, i.e. the intersection point of ventilated membrane end of a period pressure reduction and fan curve is the alarm point that ventilated membrane is changed.
The minimum air quantity q that system radiating is required
Vmin(m
3/ h) be:
q
vmin＝Q
Filter/(C
p·ρΔt)＝3.34Q
Filter/Δt
Untimely replacing ventilated membrane may cause: when brand-new ventilated membrane is started working, front and back pressure reduction changes greatly, after operation a period of time, change slowly, but when pressure reduction reaches end of a period pressure reduction before and after the ventilated membrane, change in resistance will sharply rise, therefore when the front and back of ventilated membrane pressure reduction reaches end of a period pressure reduction, should in time change, otherwise falling sharply of systematic air flow will cause apparatus overheat, influence the complete machine operate as normal, even burn out device and veneer.
Δ P=KQ
Filter(K is a resistance coefficient, is determined by material, size and the air pollution grade of ventilated membrane, because ventilated membrane is along with the variation of service time, the pollution level increase on ventilated membrane surface causes the K value can become greatly, thus the pressure reduction of increase ventilated membrane.)
The embodiment of the invention provides a kind of employing direct ventilation radiating mode equipment, air channel design and temperature controlling schemes by uniqueness, air themperature in the control appliance, both guaranteed the heat dispersion of equipment, again can be so that equipment possess dustproof, waterproof and acceleration cold-starting response time, the reliability height of equipment, maintainable strong.Because do not adopt conventional temperature conditioning unit such as heat exchanger and air-conditioning, this scheme can reduce the volume and the noise of equipment, all has advantage on performance and cost, meets the theory of energy-saving design.
For the equipment that adopts the direct ventilation cooling system, the embodiment of the invention provides a whole set of temperature complete, performability, flow control system, not only can guarantee heat dispersion, and the variation by ambient temperature, optimize the control curve of fan, accurately the control ventilation quantity is obtained the purpose that the equipment cooling demand is satisfied in the little ventilation of trying one's best to reach the adjusting rotation speed of the fan.The technical scheme that the embodiment of the invention proposes more can effectively utilize systematic air flow, makes under the systematic air flow of minimum, satisfies heat radiation, has improved the Energy Efficiency Ratio of equipment.Simultaneously, the design of the optimization in air channel and labyrinth type can make equipment possess more reliable dustproof, water resistance.Use temperature difference control air door to reduce the cold-starting response time, make the adaptive capacity to environment of equipment have greatly improved.
Specifically:
1, the temperature difference deltaT with air outlet air themperature and ambient temperature is the temperature control datum mark, use PID controller control rotation speed of the fan, realized under the prerequisite that satisfies the equipment cooling requirement, the air quantity that system is required is transferred to minimum purpose in real time, thereby reached the consumed power that reduces fan, improve the Energy Efficiency Ratio of direct ventilation cooling system, and prolonged the useful life of fan, ventilated membrane;
2, the optimization in air channel has reduced the resistance in system air channel, and has realized that device interior evenly heats in the cold start-up heating process, and air outlet temperature point monitoring reliability strengthens;
3, by the optimal control of air door, use the temperature difference deltaT of air inlet air themperature and ambient temperature to be the temperature control datum mark, not only accelerate the response time of equipment cold start-up, but also had high temperature sudden change defencive function;
4, heater reports the reliability that opens, stops both can improve equipment automatically of temperature by the air outlet temperature sensor, and can energy efficient;
5, use double-deck orifice plate to strengthen dustproof, the waterproof ability of direct ventilation cooling system, good environmental suitability is arranged;
6, can reduce equipment volume and noise, relative and temperature control equipment such as air-conditioning and heat exchanger have the advantage on the cost, meet the demand of operator's low cost operation;
7, by detection, can in time change pressure membrane to pressure before and after the ventilated membrane.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (21)
1. a straight-air radiating device is characterized in that, comprises;
Rack (16);
Equipment interpolation frame (15) is arranged on the middle section of described rack (16);
First air inlet (3,6) and first air outlet (10), it all is positioned at first side of described rack (16);
Deep bead (14), it is arranged on first side of described rack (16) and the gap between the described equipment interpolation frame (15), cuts off described first air inlet (3,6) and described first air outlet (10) being communicated with at this gap location;
First air channel (19), it connects described first air inlet (3,6) and described first air outlet (10), is formed by the gap between other three sides that are positioned at described rack (16) and the described equipment interpolation frame (15).
2. straight-air radiating device according to claim 1 is characterized in that in described first air inlet (3,6), described first air outlet (10), described second air inlet (20,21) and described second air outlet (22) at least one comprises fan.
3. straight-air radiating device according to claim 1 is characterized in that, described second channel comprises:
Fan tray (9) wherein is provided with fan.
4. straight-air radiating device according to claim 1 is characterized in that, also comprises ventilated membrane (1), is positioned at described first air inlet (3,6) front side.
5. straight-air radiating device according to claim 4 is characterized in that, described first air inlet (3,6) is near the middle part of described ventilated membrane (1).
6. straight-air radiating device according to claim 1 is characterized in that, also comprises: double-deck orifice plate (2), and it is arranged at described ventilated membrane (1) before, and it comprises a pair of mutual plate towards parallel dislocation perforate.
7. straight-air radiating device according to claim 1 is characterized in that, described first air inlet (3,6) comprising:
Fan (4,5);
Heater (7,8), it is positioned at described fan (4,5) next door.
8. straight-air radiating device according to claim 7 is characterized in that, described first air inlet (3,6) comprises having fan separately by a plurality of openings, and each described fan next door is provided with described heater.
9. straight-air radiating device according to claim 1 is characterized in that, at least one in described first air inlet (3,6), described first air outlet (10), described second air inlet (20,21) and described second air outlet (22) has air door.
10. straight-air radiating device according to claim 1 is characterized in that, also comprises:
Temperature sensor (11,12,13), it is positioned at position, following at least one place:
In described first air inlet (3,6), described first air outlet (10) neutralizes described ventilated membrane (1) before.
11. straight-air radiating device according to claim 1 is characterized in that, also comprises:
Pressure sensor (17,18), it lays respectively at described ventilated membrane (1) before and afterwards.
12. the control method of a straight-air radiating device is characterized in that, may further comprise the steps:
Measure the ambient temperature outside the air inlet of leaving air temp in the air outlet of described straight-air radiating device and described straight-air radiating device;
Calculate the temperature difference between described leaving air temp and the described ambient temperature; And
Control the rotating speed that is used to form the fan of radiating airflow in the described straight-air radiating device according to the described temperature difference.
13. control method according to claim 12 is characterized in that, measures described leaving air temp and described ambient temperature by in described air outlet and outside the described air inlet temperature sensor being set respectively.
14. control method according to claim 12 is characterized in that, the temperature difference that adopts described leaving air temp and described ambient temperature is the speed governing strategy that datum mark is set fan.
15. control method according to claim 14 is characterized in that, described speed governing strategy comprises:
When judging described leaving air temp greater than described ambient temperature, described fan increases predetermined rotating speed; When judging described leaving air temp less than described ambient temperature, described fan reduces predetermined rotating speed;
Constantly adjust, equal described ambient temperature up to described leaving air temp.
16. the control method of a straight-air radiating device is characterized in that, may further comprise the steps:
Measure the inlet temperature in the air inlet of described straight-air radiating device;
Control the air door of described air inlet and described air outlet according to the temperature difference of described inlet temperature and described ambient temperature; And
Control the work that is used for the heater strip of cold-starting in the described straight-air radiating device according to described inlet temperature.
17. control method according to claim 16, it is characterized in that, measure described leaving air temp and described ambient temperature by in described air outlet and outside the described air inlet, temperature sensor being set respectively, measure described inlet temperature in described air inlet by temperature sensor is set.
18. control method according to claim 16 is characterized in that, the air door of controlling described air inlet and described air outlet according to the temperature difference of described inlet temperature and described ambient temperature specifically comprises:
When described ambient temperature is lower than predetermined value, described air door is closed;
When described ambient temperature rises continuation above described predetermined value, described wind are opened gradually, keeping the described temperature difference is preset value;
When described ambient temperature takes place to rise suddenly, when described inlet temperature occurring and being lower than the phenomenon of described ambient temperature, close described air door, be described preset value up to the described temperature difference.
19. have ventilated membrane before the control method of a straight-air radiating device, the air inlet of described straight-air radiating device, it is characterized in that, may further comprise the steps:
Measure the air intake pressure of air intake surface of described ventilated membrane and described ventilated membrane outlet air surface go out wind pressure;
Calculate described air intake pressure and the described pressure reduction that goes out between the wind pressure; And
The user mode of calculating described ventilated membrane according to described pressure reduction is to determine whether to change ventilated membrane.
20. control method according to claim 19 is characterized in that, measures described air intake pressure and describedly goes out wind pressure by pressure sensor is set in described air intake surface and described outlet air surface.
21. control method according to claim 19 is characterized in that, when described pressure reduction during greater than predetermined pressure difference, determines that the user mode of described ventilated membrane has reached the state of necessary replacing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101227440A CN100563415C (en) | 2007-07-04 | 2007-07-04 | Straight-air radiating device and control method thereof |
| PCT/CN2008/071462 WO2009003396A1 (en) | 2007-07-04 | 2008-06-27 | Direct ventilation heat scattering device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101227440A CN100563415C (en) | 2007-07-04 | 2007-07-04 | Straight-air radiating device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101072491A true CN101072491A (en) | 2007-11-14 |
| CN100563415C CN100563415C (en) | 2009-11-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101227440A Expired - Fee Related CN100563415C (en) | 2007-07-04 | 2007-07-04 | Straight-air radiating device and control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100563415C (en) |
| WO (1) | WO2009003396A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN100563415C (en) | 2009-11-25 |
| WO2009003396A1 (en) | 2009-01-08 |
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