CN102538146A - Air conditioner air supply method utilizing air port special structure to realize equal air speed and tepefaction difference - Google Patents
Air conditioner air supply method utilizing air port special structure to realize equal air speed and tepefaction difference Download PDFInfo
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Abstract
The invention discloses an air conditioner air supply method utilizing an air port special structure to realize equal air speed and tepefaction difference. In the method, air outlet grooves with different angles, different vane quantities and different effective flow areas and guide vanes of corresponding diversion angles are designed and deployed for air ports according to different installation air port areas or different installation manners and air supply manners indoors, so that the sent airflow bundles are nearly equal in speed; and the air supply airflow frequency width is increased, the covering region of the tail end of air supply airflow is ensured to be large and the mixing intensity of the air supply airflow and indoor air is high. The method can ensure that the tail ends of the air supply airflow bundles reaching a person active region are nearly equal in air speed, thereby reducing the temperature difference caused by the speed distribution difference of the tail ends of the airflow bundles, and promoting the distribution uniformity of a speed field and a thermal field of the air supply airflow; and meanwhile, the overlay area of an air supply airflow uniform speed airflow region is increased, the air supply airflow of a designed room is filled and distributed at every nook and corner of the room to the greatest extent, and the comfortability of an air conditioner field person active region is improved.
Description
Technical field
the present invention relates to a kind of air-conditioning air supply method that utilizes wind speed tepor differences such as air port special construction realization.
Background technology
air-conditioned room air current composition depends primarily on the jet state of air-supply air-flow and restrictive condition is installed with air-supply stream flow pattern, and the version of air outlet, size and change in size will directly influence and determine mixability, diffusion, air supply direction, air-supply coverage and the air-supply stream of the stream distribution shape at its each section.Generally, need consider back selection decision outlet style to combined factors such as place Temperature and Humidity Control required precision, location of air supply inlet, building decoration requirements according to air-conditioning system.
The general structure of
air-conditioning air outlet device in the market is normally: add the parallel some guide vanes that equidistantly are arranged in the end frame by the end frame and constitute, its material mainly contains two kinds: promptly aluminium alloy extrusions or galvanized sheet form through machine-shaping.
Yet the deficiency that existing air-conditioning air outlet device exists is as follows:
1) after single air outlet device is made moulding; Guide vane is identical section and angle; Each interlobate air-flow air-supply angle of promptly flowing through is identical; And because the air-supply air-flow has identical speed when flowing out air outlet, so it is narrower and small to make that the air-supply air-flow is delivered to personnel activity's institute's coverage rate of regional time.
2) track of each particle actual motion of air-supply stream is that air-flow particle air supplying distance is different; Its terminal wind speed will have very big speed poor when the stream of therefore blowing arrives the personnel activity zone; Promptly being has a VELOCITY DISTRIBUTION poor (being velocity field), and is producing the process of energy exchange when following air motion in the air-flow transverse movement process.So the temperature of each point also must be and has difference promptly to have a Temperature Distribution poor (being the temperature field) in the personnel zone of action under air-conditioning system nature service condition; When situation is serious; When personnel pass by the air outlet zone, will obviously feel to have the blowing feeling and the temperature difference of air-supply air-flow, thereby cause the comfort property in air-conditioning place personnel activity zone to reduce greatly.
Summary of the invention
The present invention seeks to: a kind of air-conditioning air supply method that utilizes wind speed tepor differences such as air port special construction realization is provided; Its terminal wind speed was almost consistent when this method can guarantee to blow stream arrival personnel activity zone; Thereby reduce the temperature difference that difference causes because the stream tip speed distributes; Promote the velocity field of air-supply air-flow and the distributing homogeneity in temperature field, increase the overlay area of air-supply constant speed air-flow band simultaneously, maximum limit
Make the air-supply air-flow in institute design room be full of each corner that is distributed to the room
degree, improve the comfortableness in air-conditioning place personnel activity zone.
technical scheme of the present invention is: a kind of air-conditioning air supply method that utilizes wind speed tepor differences such as air port special construction realization; It is characterized in that: according to indoor different installation region, air port or different mounting means and air supply modes; Be the different wind directions of air port design configurations, different blade quantity, the air-out groove of different valid circulation area and the guide vane of corresponding channelization angle; Make the stream of seeing off be almost equal speed; And increase air-supply air-flow bandwidth, the terminal overlay area of the air-flow of guaranteeing to blow is big and high with the room air mixing intensity.
Main theory basis and the method detailed process that the present invention relates to are following:
1) design and installation highly is that H, throat's width (perhaps height) are Bo, and guide vane quantity is i-1, and air-supply air flow stream groove quantity is i air port between blade, i>=4; According to the concrete operating mode of air-supply; Guide vane quantity that design configurations is different and channelization angle and two interlobate bore size (promptly through regulating between control two blades the size of throat's width and the size of length direction) along the air port along the air port; Thereby obtain i the circulation groove that valid circulation area varies in size, the wind speed V3i that flows to each guide vane according to following formula adjusting control is different with the air-supply air-flow wind speed V2i that flows out each guide vane;
The formula of foundation is bernoulli (Bnulie) equation for the steady flow energy equation:
P1+1/2*(R*S1*V1
2
)+Z1=?P2+1/2*(R*S2i*V2i
2
)+Z2+1/2*R*S3i*V3i
2
P1 in the formula, P2 represent to blow air-flow respectively into and out of the static pressure in air port, and V1 representes the air-supply air-flow wind speed of air inlet; S1 is the resistance coefficient of air inlet air-supply air-flow; The V2i air-flow of representing to blow flows out the wind speed of each guide vane; R representes atmospheric density, Z1, Z2 represent respectively the to blow potential energy of air-flow inlet and outlet; V3i is the wind speed during the perforate effective area between air-supply airflow passes each guide vane; S3i, S2i are respectively between air-supply airflow passes blade and the resistance coefficient when flowing out blade, and P2 also is the space air static pressure simultaneously; In view of generally, the difference in height that the air-supply air-flow is positioned at inlet and outlet is very little, and promptly potential energy changes very little; Above-mentioned secondary cause is ignored the back expression formula can be developed into:
P1+1/2*(RS1*V1
2
)=1/2*(R*S2i*V2i
2
)+1/2*R*S3i*V3i
2
；
Above-mentioned expression formula has reflected the wind speed V3i of valid circulation area between each guide vane of air-supply airflow passes and has flowed out the wind speed V2i of air port blade and the functional relation between corresponding coefficient of partial resistance S2i and the S3i;
are through being provided with the size of valid circulation area between guide vane; The coefficient of partial resistance S2i of this guide vane groove, the size of S3i have also been regulated, confirmed simultaneously to the adjusted control air-supply stream air quantity of this guide vane groove of flowing through to a great extent; The wind speed V2i that finally regulates and controlling the air-supply stream of this guide vane realizes having between the different blade grooves re-set target of different air-out wind speed, air supplying distance, air supply direction.
2) calculating the regional center wind speed of guaranteeing to flow out between each guide vane that belongs to the cross section of stream arrival personnel activity according to following plane free jet axle core velocity attenuation expression formula equates:
Vxi/V2io=1.2/〔(ai*Xi/boi)+0.41〕
1/2
In the formula: Vxi: expression air-supply air flow stream air outlet arrives the AnchorPoint wind speed in cross section, arbitrfary point xi place; The Xi value is the air-supply air-flow and flows out the air supplying distance that arrives personnel activity zone (being each interlobate air-supply stream of outflow of desired design) behind each flow deflector;
V2io: the mean wind speed during each blade of statement air-supply air flow stream air outlet;
Ai: the turbulence factor of each guide vane air outlet place cross section air-supply air-flow of corresponding air port;
Boi: the height in each cross section, guide vane air outlet place, air port;
3) obtain the angle of flare of air-supply air-flow under the plane jet operating mode through following formula, and then flow through stream between each guide vane of assessment when needed arrives the distribution situation of personnel activity zone (the terminal wind speed of corresponding air-supply air-flow);
tanq=2.44*ai
Q is air-supply air-flow main paragraph air-flow angle of flare, the turbulence factor when ai flows out between each guide vane effective flow area for the air-supply air-flow, and its value depends on the changing value and the shape of effective flow area value of each blade and flow area; The size of the channelization angle of said blade is to confirm and limit the air supply direction of air-supply air-flow, and the size in each cross section is confirmed the valid circulation area of each blade of air-supply air flow stream air outlet between blade;
4) utilize the angle of flare q value that obtains further to assess the diffusion profile situation of air-supply air-flow; The distance L of regulating and control air-supply stream zone from the air outlet to personnel activity through the air supply direction differential seat angle and the air-out speed of air-supply airflow passes each guide vane; Also be the distance L between the air-supply stream central point of each guide vane, the big young pathbreaker of its value regulates control constant speed air-flow bandwidth;
5) calculate through following formula and know that air-supply air-flow arbitrary section overdraught Temperature Distribution and VELOCITY DISTRIBUTION concern: ⊿ Tx/ ⊿ To=0.73 * (Vxi/V2io)
In the formula: ⊿ Tx is apart from poor for the jet axis temperature at x place and room mean temperature of air outlet distance.
⊿ To is poor for air-supply air-flow air outlet mean temperature and room temperature;
Vxi is the speed of air-supply air-flow at arbitrary section point;
V2io goes out the average speed of blade profile for the air-supply air flow stream.
The technological argument that the present invention can set up:
A, for a certain specific monoblock type slot outlet, constant speed air-flow bandwidth (area of effective coverage that the prompt delivery general mood flows) requirement that requires according to the air supplying distance and the expection of its installation site confirmed and requirement; Can be through to designing in advance, confirm that methods such as different sizes, blade lead angle and variation, valid circulation area size realize regulating effectively and controlling between the different blades in same air port.
B, because the differential static pressure of perforate cross section two sides is equal basically in the air port, therefore between two different blades of same air port, because the difference of its valid circulation area, its air quantity of flowing through is also different under the equal static pressure effect.
C, because the valid circulation area in each interlobate air-supply air flow stream of flowing through goes out blade cross section, time place can have adjustable performance as required, thereby the air-out wind speed that obtains air-supply stream between different blades is different.Air supplying distance requires air-out wind speed far away bigger, otherwise then wind speed is less.
D, just because of above-mentioned condition, prompt delivery general mood stream flows out each interlobate stream and has different speed, thus stream flows out air supplying distance behind each blade also with difference.We can set: require under the identical prerequisite of the terminal wind speed of air-supply air-flow (promptly overhead the calculating plane at 1.7 meters places), set the air speed value that flows out each blade stream according to the air supplying distance desired value.Because each blade is provided with certain channelization angle, have different air-out speed, air supplying distance and air supply direction on the other hand thereby accomplish the interlobate stream of respectively blowing of air-supply airflow passes.Reach desired design target with bigger constant speed air-flow center wind speed width band.
Advantage of the present invention is:
1, the inventive method are fit to top air-supply and two kinds of different air-conditioning supply air systems of side air-supply, according to the air port different install and use position or setting height(from bottom); For same air port; But design configurations has the air-out groove of different wind directions, different guide vane quantity, different valid circulation area and has the guide vane of corresponding channelization angle, make the stream seen off when arriving the personnel activity zone with almost equal speed, different air supply direction, air-supply air-flow band broad, the terminal institute of air-supply air-flow overlay area is big and characteristics such as air-flow mixing intensity height.
2, the inventive method can make the air-supply air-flow in institute design room be full of each corner that is distributed to the room to greatest extent, i.e. the velocity field and the uniform distribution of temperature field performance of room air-supply air-flow obtain effectively obviously promoting.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Fig. 1 is the structural representation (side air-supply, four air ports) of a kind of air port layout embodiment;
Fig. 2 is the section structure sketch map in single air port in Fig. 1 embodiment;
Fig. 3 is a single air port air-supply stream axis speed line running orbit distribution schematic diagram in Fig. 1 embodiment;
Fig. 4 illustrates the room wind speed/temperature detection sample position distribution schematic diagram of case for Fig. 1;
Fig. 5 is the air port section structure sketch map of another embodiment of the present invention;
Fig. 6 is constant speed air-supply air-flow bandwidth size sketch map under the side air-supply operating mode;
The terminal constant speed air-flow of air-flow width band L size sketch map when Fig. 7 implements with the top air supply mode for adopting air port shown in Figure 5;
Fig. 8 is that return air air-conditioning supply air system mounting structure sketch map is gone up in top of the present invention air-supply;
Fig. 9 is a return air air-conditioning supply air system mounting structure sketch map under the side air-supply homonymy of the present invention;
Figure 10 is return air air-conditioning supply air system mounting structure sketch map on the side air-supply homonymy.
The specific embodiment
embodiment 1: combine Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, the room length of design, detection scheme is respectively: 20*9.5*4.6 (m), air supply mode adopt the air-supply of single face side, and the air port setting height(from bottom) is: 3m (terrain clearance).The air port model specification that adopts is: FK-ZTF/80*1600; 4 of inlet numbers, specifically as shown in Figure 1; Single air port air output is 1200CMH.Terminal constant speed air-flow (center wind speed) the width band of the air-supply air-flow value of calculating through the present invention program is 5.8m.It is 3 that the air port has the guide vane number.The air-supply angle that each interlobate air-supply stream goes out guide vane corresponds to respectively: 9 °, 12 °, 18 ° and 25 °.Prove that according to winter condition it is 28 ℃ that the air-flow wind pushing temperature is promptly arranged, the temperature that the room requires is 18 ℃.Air port mounting condition and wind pushing form: side air-supply, one-sided air-supply, the return air under one side of opposite gone up.The concrete layout sectional schematic diagram in air port is as shown in Figure 2:
(prove according to the present invention imagine various other the relevant concrete schemes that to realize in advance through description) to the design of the following technical parameter of this case and definite engineering.The concrete correlation technique parameter that calculating or explanation are confirmed has: (the preceding no longer repeat specification of having explained of parameter symbol)
The formula that adopts is bernoulli (Bnulie) equation for the steady flow energy equation:
P1+1/2*(R*S1*V1
2
)+Z1=?P2+1/2*(R*S2i*V2i
2
)+Z2+1/2*R*S3i*V3i
2
P1, P2, R, V1, F3i; V3i, Q3i, F2i V2i, ai, Vxi, xi, boi, L, L1, q specifies as follows below:
1) P1 air-conditioning system airduct air-flow gets into the static pressure (provided by system's design, this case maximum static pressure value is 160Pa) in air port, and P2 is room air static pressure (indoor maintenance slight positive pressure state can be regarded as 5Pa usually),
2) the desirable definite value of R atmospheric density is 1.2kg/m
3
,
3) V1 is the preceding wind speed of air-supply air flow stream air inlet,
Its calculated value is Q/F=(1200/3600)/(0.08*1.6) 2.6m/s.
In
formula: 0.08m is an air port throat height net value, and 1.6m is the air port computational length.
4) F3i is confirmed by bore size that for each interlobate valid circulation area of air-supply airflow passes air port concrete size is seen Fig. 2.
F31＝0.0304m
2
，F32＝0.0256m
2
，F33＝0.023m
2
，F34＝0.0186m
2
Get cross section 1-1 and 3-3 for object is discussed, the valid circulation area sum is between each blade:
0.0304+0.0256+0.023+0.0186=0.0976m
2
The mean wind speed of air-supply airflow passes valid circulation area is between blade: 1200/3600*0.0976=3.42m/s. is because each interlobate bore size is different; Therefore the pressure loss during perforate is also different between its air-supply airflow passes blade; Because the static pressure of air has the transmitable characteristics, therefore blowing has difference between each interlobate wind speed of airflow passes and the mean wind speed slightly on the other hand, below is that V3i is the air-supply air-flow that obtains of actual detected in each interlobate mean wind speed value of flowing through:
V31＝3.60m/s,V32=3.5m/s,V33=3.3m/s,V34=3.1m/s.
Each interlobate air quantity of the corresponding air-supply of Q3i airflow passes is:
Q31＝3.60×0.0304*3600＝394m
3
/h, 0.019×1.6 22%
Q32＝3.5*0.0256*3600＝323m
3
/h 0.016×1.6 21.4%
Q33＝3.3*0.023*3600＝273m
3
/h 0.0144×16 18.3％
Q34＝3.1*0.0186*3600＝210m
3
/h 0.0116×1.6 30％
5) F2i is the valid circulation area in each blade exit cross section of air flow stream air outlet, is confirmed by blade water conservancy diversion angle and geomery.Ask for an interview Fig. 2, wherein F21=0.031m
2
, F22=0.030m
2
, F23=0.0298m
2
, F24=0.0256m
2
6) V2i is for flowing out the mean wind speed of valid circulation area between each guide vane
The air-supply air-flow flows out the wind speed V2i (being the 2-2 cross section) of each blade groove
V21＝394/(0.031*3600)=3.53m/s 0.0194*1.6
V22=323/(0.030*3600)=2.99m/s 18.% 0.019*1.6
V23=273/(0.0298*3600)=2.54m/s 13.8% 0.0186*1.6
V24=210/(0.0256*3600)=2.27m/s 11.9％ 0.016*1.6
7) by plane free jet axle core velocity attenuation expression formula
Vxi/V2oi=1.2/〔(ai*Xi/boi)+0.41〕
1/2
And air-supply stream axis speed line running orbit distribution schematic diagram (by the direction of blade channelization angle decision) is promptly shown in Figure 3, and the terminal center air speed value that can calculate four stingy a fluid streams is
Vx1/3.53=1.2/〔(0.16*8.71/0.0194)+0.41〕
1/2?
Vx1＝1.2*3.53?/8.49=0.5m/s
ai1=0.16?
can solve Vx1=0.50m/s, and corresponding guide vane air-supply angle is 9 °.In like manner can solve:
Vx2/2.99＝1.2/〔(0.16*6.27/0.019)+0.41〕
1/2
,
Vx2=1.2*2.99/7.29=0.492m/s ai2=0.16
Vx2=0.492m/s. corresponding guide vane air-supply angle is 12 °.
Vx3/2.54＝1.2/〔(0.16*4.21/0.0186)+0.41〕
1/2
Vx3=1.2*2.54/6.05=0.50m/s ai3=0.16
Vx3=0.50m/s; Corresponding guide vane air-supply angle is 18 °.
Vx4/2.27＝1.2/〔(0.155*3.1/0.016)+0.41〕
1/2
,
Vx4=1.2*2.27/5.52=0.493m/s ai4=0.155
Vx4=0.493m/s; Corresponding guide vane air-supply angle is 25 °;
Ai in
aforementioned calculation process is the corresponding turbulent air flow coefficient of each blade air-supply groove, and its value is a value between 0.15～0.16, the factor of speed degree of irregularity on its each guide vane different cross section of value reflection; Generally can also verify by experiment.
Four little air-supply stream in
visible whole air port are very little in the terminal wind speed difference of design position.
8) assessment air-supply air-flow constant speed air-flow width band L and L1; Can clearly be seen that by Fig. 3 the width L that four little air-supply stream distribute is 61% for (8.6-2.8) 5.8m center wind speed institute covering room beam overall; Consider that the center wind speed is in the process of delivering to the personnel activity zone; Its air-flow has diffusion characteristic; Can learn that by the magnitude relationship between aforementioned air-supply air-flow angle of flare and the turbulence factor angle of flare of this case air-flow is about about 21 °; Its less diffusion radius value is 1.4m, and the overlay length L1 of diffusion institute of promptly actual air-supply air-flow is: it is 90.5% that 5.8+ (2*1.4)=8.6m promptly accounts for room width ratio.Room wind speed/temperature detection sample position distribution schematic diagram is as shown in Figure 4, collects the terminal wind speed of air-supply air-flow and the temperature of 25 test points altogether, and the temperature detection value of each point please see the following form listed in mean wind speed actual detected value that its air-supply air-flow is terminal and the room:
| The test point position | A11 | A12 | A13 | A14 | A15 |
| Test point wind speed (m/s) | 0.33 | 0.32 | 0.32 | 0.31 | 0.3 |
| Test point temperature (° C) | 17.8 | 18.1 | 18.1 | 18 | 17.9 |
| The test point position | A21 | A22 | A23 | A24 | A25 |
| Test point wind speed (m/s) | 0.33 | 0.31 | 0.32 | 0.31 | 0.3 |
| Test point temperature (° C) | 17.8 | 18 | 18.1 | 18 | 17.8 |
| The test point position | A31 | A32 | A33 | A34 | A35 |
| Test point wind speed (m/s) | 0.34 | 0.32 | 0.33 | 0.32 | 0.31 |
| Test point temperature (° C) | 17.9 | 18.2 | 18.1 | 18.1 | 17.9 |
| The test point position | A41 | A42 | A43 | A44 | A45 |
| Test point wind speed (m/s) | 0.33 | 0.32 | 0.32 | 0.31 | 0.31 |
| Test point temperature (° C) | 17.8 | 18.1 | 18.1 | 18 | 17.9 |
| The test point position | A51 | A52 | A53 | A54 | A55 |
| Test point wind speed (m/s) | 0.33 | 0.32 | 0.32 | 0.31 | 0.3 |
| Test point temperature (° C) | 17.8 | 18.1 | 18.1 | 18 | 17.9 |
can be known by above table, and the air-flow velocity behind employing the present invention program in the air-conditioned room distributes and Temperature Distribution all becomes evenly, can make the people produce comfort.
The technological argument that said method can be set up:
A, for a certain specific monoblock type slot outlet, constant speed air-flow bandwidth (area of effective coverage that the prompt delivery general mood flows) requirement that requires according to the air supplying distance and the expection of its installation site confirmed and requirement; Can be through to designing in advance, confirm that methods such as different sizes, blade lead angle and variation, valid circulation area size realize regulating effectively and controlling between the different blades in same air port.
B, because the differential static pressure of two sides (being between 1-1 cross section and 3-3 cross section) is equal basically in perforate cross section, air port; Therefore between two different blades of same air port; Because the difference of its valid circulation area, its air quantity of flowing through is also different under the equal static pressure effect.
C, because the valid circulation area in each interlobate air-supply air flow stream of flowing through goes out blade cross section, time place (2-2) can have adjustable performance as required, thereby the air-out wind speed that obtains air-supply stream between different blades is different.Air supplying distance requires air-out wind speed far away bigger, otherwise then wind speed is less.
D, just because of above-mentioned condition, prompt delivery general mood stream flows out each interlobate stream and has different speed, thus stream flows out air supplying distance behind each blade also with difference.We can set: require under the identical prerequisite of the terminal wind speed of air-supply air-flow (promptly overhead the calculating plane at 1.7 meters places), set the air speed value that flows out each blade stream according to the air supplying distance desired value.Because each blade is provided with certain channelization angle, have different air-out speed, air supplying distance and air supply direction on the other hand thereby accomplish the interlobate stream of respectively blowing of air-supply airflow passes.Reach desired design target with bigger constant speed air-flow center wind speed width band.
embodiment 2: as can be seen from Figure 5, this product has seven guide vanes, and each guide vane has different air-supply air flow guiding angles; Eight different effective circulation height (combining to be valid circulation area after the length factor of air port) are being arranged between guide vane.The branch wind pipe of air-conditioning supply air system can be connected with air port throat easily, also can be connected with plenum chamber as required.The special requirement occasion can also dispose volume adjusting apparatus, and to make things convenient for the system debug air balance, concrete computational process is participated in embodiment 1, no longer details.
combine Fig. 5, Fig. 7 visible; With return air air-conditioning supply air system mounting structure under the air-supply of top is example, and 1.7m is highly selected in the personnel activity zone, and cross section, air port to top, personnel activity zone height is H1; The air port throat opening is D1, and finally can draw constant speed air-flow band is L.
embodiment 3: shown in Figure 8 is the present invention's concrete utilization in the return air air-conditioning supply air system in the air-supply of top; In different relatively positions, the air port that different segmentation specifications are installed is D1, D2; D3 etc.; These segmentation air ports have different wind feeding blades numbers and blade channelization angle value, specifically see Fig. 8, make the air-flow in the space of blowing be abound with the uniformity and reach more than 80%.
embodiment 4: shown in Figure 9 is the present invention's concrete utilization in the return air air-conditioning supply air system under side air-supply homonymy; In two relative positions; The air port that different segmentation specifications are installed is C1, C2, and these segmentation air ports have different wind feeding blades numbers and blade channelization angle value; Specifically see Fig. 9, make the air-flow in air-supply space be abound with the uniformity and reach more than 80%.
embodiment 5: shown in Figure 10ly be the present invention's concrete utilization in the return air air-conditioning supply air system on side air-supply homonymy, make the air-flow in air-supply space be abound with the uniformity and reach more than 80%.
the foregoing description certainly only are explanation technical conceive of the present invention and characteristics, and its purpose is to let the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All modifications that the spirit of main technical schemes is done according to the present invention all should be encompassed within protection scope of the present invention.
Claims (3)
1. air-conditioning air supply method that utilizes wind speed tepor differences such as air port special construction realization; It is characterized in that: according to indoor different installation region, air port or different mounting means and air supply modes; Be the different wind directions of air port design configurations, different blade quantity, the air-out groove of different valid circulation area and the guide vane of corresponding channelization angle; Make the stream of seeing off be almost equal speed; And increase air-supply air-flow bandwidth, the terminal overlay area of the air-flow of guaranteeing to blow is big and high with the room air mixing intensity.
2. a kind of air-conditioning air supply method that utilizes wind speed tepor differences such as air port special construction realization according to claim 1 is characterized in that comprising the steps:
1) highly for H, throat's width are Bo, guide vane quantity is i-1 in design and installation, and air-supply air flow stream groove quantity is i air port between blade, i >=4; According to the concrete operating mode of air-supply; Guide vane quantity that design configurations is different and channelization angle and two interlobate bore size; Thereby obtain i the circulation groove that valid circulation area varies in size, the wind speed V3i that flows to each guide vane according to following formula adjusting control is different with the air-supply air-flow wind speed V2i that flows out each guide vane;
Said formula is bernoulli (Bnulie) equation for the steady flow energy equation:
P1+1/2*(R*S1*V1
2)+Z1=?P2+1/2*(R*S2i*V2i
2)+Z2+1/2*R*S3i*V3i
2
P1 in the formula, P2 represent to blow air-flow respectively into and out of the static pressure in air port, and V1 representes the air-supply air-flow wind speed of air inlet; S1 is the resistance coefficient of air inlet air-supply air-flow; The V2i air-flow of representing to blow flows out the wind speed of each guide vane; R representes atmospheric density, Z1, Z2 represent respectively the to blow potential energy of air-flow inlet and outlet; V3i is the wind speed during the perforate effective area between air-supply airflow passes each guide vane; S3i, S2i are respectively between air-supply airflow passes blade and the resistance coefficient when flowing out blade, and P2 also is the space air static pressure simultaneously; In view of generally, the difference in height that the air-supply air-flow is positioned at inlet and outlet is very little, and promptly potential energy changes very little; Above-mentioned secondary cause is ignored the back expression formula can be developed into:
P1+1/2*(RS1*V1
2)=1/2*(R*S2i*V2i
2)+1/2*R*S3i*V3i
2；
2) calculating the regional center wind speed of guaranteeing to flow out between each guide vane that belongs to the cross section of stream arrival personnel activity according to following plane free jet axle core velocity attenuation expression formula equates:
Vxi/V2io=1.2/〔(ai*Xi/boi)+0.41〕
1/2
In the formula: Vxi: expression air-supply air flow stream air outlet arrives the AnchorPoint wind speed in cross section, arbitrfary point xi place;
Xi: value is and arrives the regional air supplying distance of personnel activity after the air-supply air-flow flows out each flow deflector;
V2io: the mean wind speed during each blade of statement air-supply air flow stream air outlet;
Ai: the turbulence factor of each guide vane air outlet place cross section air-supply air-flow of corresponding air port;
Boi: the height in each cross section, guide vane air outlet place, air port;
3) obtain the angle of flare of air-supply air-flow under the plane jet operating mode through following formula, and then assess the regional distribution situation of stream arrival personnel activity between each guide vane of flowing through when needed;
tanq=2.44*ai
Q is air-supply air-flow main paragraph air-flow angle of flare, the turbulence factor when ai flows out between each guide vane effective flow area for the air-supply air-flow, and its value depends on the changing value and the shape of effective flow area value of each blade and flow area; The size of the channelization angle of said blade is to confirm and limit the air supply direction of air-supply air-flow, and the size in each cross section is confirmed the valid circulation area of each blade of air-supply air flow stream air outlet between blade;
4) utilize the angle of flare q value that obtains further to assess the diffusion profile situation of air-supply air-flow; The distance L of regulating and control air-supply stream zone from the air outlet to personnel activity through the air supply direction differential seat angle and the air-out speed of air-supply airflow passes each guide vane; Also be the distance L between the air-supply stream central point of each guide vane, the big young pathbreaker of its value regulates control constant speed air-flow bandwidth;
5) calculate through following formula and know that air-supply air-flow arbitrary section overdraught Temperature Distribution and VELOCITY DISTRIBUTION concern: ⊿ Tx/ ⊿ To=0.73 * (Vxi/V2io)
: ⊿ Tx is apart from poor for the jet axis temperature at x place and room mean temperature of air outlet distance in the formula;
⊿ To is poor for air-supply air-flow air outlet mean temperature and room temperature;
Vxi is the speed of air-supply air-flow at arbitrary section point;
V2io goes out the average speed of blade profile for the air-supply air flow stream.
3. a kind of air-conditioning air supply method that utilizes wind speed tepor differences such as air port special construction realization according to claim 2; It is characterized in that in the said step 1) that size through valid circulation area between guide vane is set to regulate the flow through air quantity of this guide vane groove of control air-supply stream, also regulates the coefficient of partial resistance S2i of this guide vane groove, the size of S3i simultaneously.
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