CN105178831A - Optimization designing method of sunshade and light-guiding louver blades of louver - Google Patents

Abstract

The invention discloses an optimization designing method of sunshade and light-guiding louver blades of a louver. When the sunshade and light-guiding louver blades designed according to the method are applied to the louver having fixed pitch, no matter the sun is at a high position or a low position, sunlight irradiated to a light guiding portion of each louver blade can be guided deep into a room, and sunlight irradiated to a light reflecting portion of each louver blade can be reflected to the outside of the room without being reflected to the back of an upper adjacent louver blade, so that dazzling can be eliminated without specially treating the back of each louver blade; when the sunshade and light-guiding louver blades designed according to the method are applied to the louver variable in pitch, a proportion, accounting for width of cross section of the corresponding whole louver blade, of the light guiding portion of each louver blade can be increased, so that the louver can reflect more needless sunlight in summer and guide in more sunlight for heating in winter, and better energy saving effect is realized. In addition, transparency of the louver variable in pitch can be maintained optimal.

Description

The Optimization Design of the guide-lighting louvre blade of a kind of shutter sunshade

Technical field

The present invention relates to a kind of louvre blade method for designing, more particularly, it relates to the Optimization Design of the guide-lighting louvre blade of a kind of shutter sunshade.

Background technology

As everyone knows, minute surface orienting reflex louvre blade is made up of light-reflecting portion and light guide section, light-reflecting portion by the sunlight orienting reflex that irradiates on it to outdoor, the sunlight orientation of irradiating on it is imported to indoor by light guide section, usual light guide section is the minute surface cylinder be bent upwards, light-reflecting portion then has the cylinder form of two kinds of varying cross-sections, and a kind of is the arc cylinder be bent upwards of primary event, and another kind is zigzag cylinder with the cross section of secondary reflection.Such as German patent DE 19503293A1, DE19543812A1, DE10260711A1 discloses the cambered surface louvre blade be bent upwards that light-reflecting portion and light guide section all for once reflect, the defect of this class louvre blade is that rated wind velocity is poor, when shutter is closed, louvre blade cannot be completely closed, the sunlight being irradiated to louvre blade light guide section when the sun is in lower is made to reflex to the back side of a slice louvre blade and be transferred to indoor, thus fail to reach the state of indoor complete darkness, in order to overcome these defects, DE19828542A1, DE19929138A1, DE102010005054A1 discloses a kind of Z-shaped minute surface louvre blade.But, the minute surface louvre blade of above-mentioned patent application publication has a defect, namely when the sun is in lower, the sunlight being irradiated to minute surface louvre blade light-reflecting portion all can reflex to the back side of an adjacent louvre and causes dazzle and solar heat is stayed within, quite a few sunlight is not blocked by louvre blade and directly enters indoor simultaneously, when the sun is in eminence, the sunlight being irradiated to minute surface louvre blade light guide section cannot import to indoor vertical-depth.Above-mentioned minute surface louvre blade is generally all only applied to traditional fixed knot on shutter, once louvre blade overturns a little outward, then the sunlight be irradiated on louvre blade according to the opticpath reflection preset and cannot import.In order to overcome this defect, Chinese invention patent CN102839909B, CN101818616B successively disclose several variable pitch window shutter, adapt to dynamic sunlight by the change of louvre blade spacing and the rotary fine adjustment of louvre blade, make the sunlight be irradiated on louvre blade reflect according to the opticpath preset and import.But when above-mentioned Z-shaped minute surface louvre blade is applied to variable pitch window shutter, there will be equally be in lower sun altitude solar radiation to minute surface louvre blade time, the sunlight dropping on louvre blade light-reflecting portion can reflex to the back side of an adjacent louvre and causes dazzle and solar heat is stayed within, when the sun is in eminence, the sunlight being irradiated to minute surface louvre blade light guide section cannot be directed to indoor vertical-depth.

Summary of the invention

The invention provides the Optimization Design of the guide-lighting louvre blade of a kind of shutter sunshade, when the guide-lighting louvre blade of the sunshade designed according to this optimization method is applied to fixed knot apart from shutter, no matter when the sun is in eminence or lower, the sunlight being irradiated to this louvre blade light guide section can be directed to indoor vertical-depth, the sunlight being irradiated to this louvre blade light-reflecting portion also can be reflected to outdoor and no longer be reflected to the back side of an adjacent louvre blade, makes the louvre blade back side just can eliminate dazzle without the need to carrying out specially treated; And when being applied to variable pitch window shutter according to the guide-lighting louvre blade of this method design sunshade out, the ratio that the light guide section of louvre blade can be accounted for the cross-sectional width of whole louvre blade brings up to about 70%, make shutter can reflect more how unwanted sunlight in summer, the more sunlight for warming oneself is imported in winter, obtain better energy-saving effect, in addition, no matter the sun is in eminence or lower, and variable pitch window shutter can keep best transparency.

Technical scheme of the present invention is: the Optimization Design of the guide-lighting louvre blade of a kind of shutter sunshade, be applied on the guide-lighting shutter of the sunshade with high-order louvre blade and low level louvre blade, high-order louvre blade and low level louvre blade all have the light-reflecting portion by outside and the light guide section by indoor, light-reflecting portion and light guide section are arcwall face, and the method comprises the following steps:

A. determine a design point according to shutter axial dimension and louvre blade pitch requirements, setting design point place sun altitude is H _d, the angle of light-reflecting portion outer end reflection ray and horizontal plane is γ on high-order louvre blade cross section _a, the angle of light-reflecting portion summit place's reflection ray and horizontal plane is γ on high-order louvre blade cross section _b, the summit place reflection ray of light guide section and the angle of horizontal plane are β on high-order louvre blade cross section _b, the inner reflection ray of light guide section and the angle of horizontal plane are β on high-order louvre blade cross section _d1, partition plane on low level louvre blade cross section between light-reflecting portion and light guide section and vertical plane angle be δ ₂, on low level louvre blade cross section, at the bottom of light guide section, the angle of some place's reflection ray and horizontal plane is β _c, the angle of the inner reflection ray of light guide section and horizontal plane is β on low level louvre blade cross section _d2;

B. choose louver sheet be in open mode under horizontal attitude, inner as measuring initial point on high-order louvre blade cross section, the horizontal range setting extremely high-order louvre blade the inner, summit on actual high-order louvre blade cross section is L _bd, to measure initial point to the horizontal range of high-order louvre blade outer end be L;

C. the angle α of string plane that between summit and high-order louvre blade the inner, line is formed and horizontal plane is determined on high-order louvre blade cross section according to following optimization formula ₁, between summit and high-order louvre blade outer end, line is formed on high-order louvre blade cross section string plane and vertical plane angle δ ₁, light-reflecting portion cambered surface radius R _ab, light guide section cambered surface radius R _bd:

${\mathrm{\α}}_1=\frac{2H_d-({\mathrm{\β}}_b+{\mathrm{\β}}_{d1})}{4}$

${\mathrm{\δ}}_1=\frac{2H_d+({\mathrm{\γ}}_a+{\mathrm{\γ}}_b)}{4}$

${\stackrel{\‾}{R}}_{bd}=\frac{{\stackrel{\‾}{L}}_{bd}}{2{\mathrm{cos\α}}_1\sin \frac{{\mathrm{\β}}_{d1}-{\mathrm{\β}}_b}{4}}$

${\stackrel{\‾}{R}}_{ab}=\frac{1-{\stackrel{\‾}{L}}_{bd}}{2{\mathrm{sin\δ}}_1\sin \frac{{\mathrm{\γ}}_a-{\mathrm{\γ}}_b}{4}}$

In formula ${\stackrel{\‾}{R}}_{bd}=R_{bd}/L,{\stackrel{\‾}{R}}_{ab}=R_{ab}/L,{\stackrel{\‾}{L}}_{bd}=L_{bd}/L;$

D. same method, the string plane formed according to line between following optimization formula determination low level louvre blade cross section upper base point and low level louvre blade the inner and the angle α of horizontal plane ₂, light guide section cambered surface radius R on low level louvre blade cross section _cd:

${\mathrm{\α}}_2=\frac{-2H_d+({\mathrm{\β}}_c+{\mathrm{\β}}_{d2})}{4}$

${\stackrel{\‾}{R}}_{cd}=\frac{{\stackrel{\‾}{L}}_{bd}(1-{\mathrm{tan\α}}_1{\mathrm{tan\δ}}_2)}{2(1+{\mathrm{tan\α}}_2{\mathrm{tan\δ}}_2){\mathrm{cos\α}}_2\sin \frac{{\mathrm{\β}}_{d2}-{\mathrm{\β}}_c}{4}}$

In formula ${\stackrel{\‾}{R}}_{cd}=R_{cd}/L.$

The sunshade light-guiding function of louvre blade is realized the reflection of sunlight by light-reflecting portion, light guide section.Though high-order louvre blade is identical with low level louvre blade light-reflecting portion shape, but overall structure is different, high-order louvre blade is generally splayed, and low level louvre blade is generally Z-shaped, on low level louvre blade, a branch of reflection ray of light guide section is larger than the minimum angle of a branch of reflection ray of light guide section and horizontal plane on high-order louvre blade with the minimum angle of horizontal plane, therefore light-reflecting portion, the cambered surface radius at the high-order light guide section of louvre blade and light guide section three place of low level louvre blade needs to be optimized design respectively, shutter is made farthest to shield light when not needing photo-thermal and to eliminate dazzle, and farthest light imported indoor when needs photo-thermal and eliminate dazzle, if by the method for repeatedly testing progressively amendment design to reach optimum efficiency, huge time and expense can be expended undoubtedly, and use method provided by the invention, only need by the more given design parameters easily surveying easily control, just can be accurately, determine the cambered surface radius at three places easily, greatly save time and expense, reduce design cost, shorten product development cycle.

As preferably, span be 0.5 ~ 0.8, reflect the choice of louvre blade light import volume, value is larger, and light import volume is larger.

As preferably, design point place sun altitude H _dspan be 35 ° ~ 45 °, choose this value and designed louvre blade can be allowed within the scope of high sun altitude and low sun altitude two, to reach the reflective of optimization and light guide effect better.

As preferably, γ _aspan be 70 ° ~ 88 °, γ _bspan be 40 ° ~ 50 °.Determine that these spans are in order to louvre blade meets actual requirement better, avoid light reflection to the back side of a upper adjacent louvre.

As preferably, β _bspan be 0 ~ 20 °, β _d1span be 55 ° ~ 85 °.Determine that these spans are in order to louvre blade meets actual requirement better, avoid light reflection to the back side of a upper adjacent louvre.

As preferably, β _cspan be 45 ° ~ 55 °, β _d2span be 80 ° ~ 88 °.Determine that these spans are in order to louvre blade meets actual requirement better, avoid light reflection to the back side of a upper adjacent louvre.

As preferably, δ ₂span be 10 ° ~ 45 °.Determine that these spans are in order to louvre blade meets actual requirement better, avoid the partition plane of louvre blade to produce light and interfere.

As preferably, after completing steps A-D, the light guide section of high-order louvre blade is done vertical down translation with the light guide section of low level louvre blade, increases the position drop between light guide section and light-reflecting portion.By this design change, a branch of reverberation of the light guide section of high-order louvre blade and the light guide section of low level louvre blade and the minimum angle of horizontal plane can be adjusted as required, also can strengthen the flexural strength of high-order louvre blade.

The invention has the beneficial effects as follows:

The present invention can make louvre blade obtain optimized design, the louvre blade produced like this can import the light needed indoor, and unnecessary light is effectively shielded, thus meet the requirement of people to indoor thermal comfort and visual adaptability, obtain better energy-saving effect.

Accompanying drawing explanation

The cross-sectional view of the high-order louvre blade of Fig. 1 shutter and geometric parameter;

The cross-sectional view of Fig. 2 shutter low level louvre blade and geometric parameter;

The high-order louvre blade cell cross-section of Fig. 3 single two points of variable pitch window shutter and geometric parameter;

Fig. 4 single two points of variable pitch window shutter low level louvre blade cell cross-section and geometric parameter;

When Fig. 5 single two points of variable pitch window shutter are in space D/2, high-order louvre blade unit is at sun altitude design point H _dreflective and the light guide effect figure at=45 ° of places;

When Fig. 6 single two points of variable pitch window shutter are in space D/2, low level louvre blade unit is at sun altitude design point H _dreflective and the light guide effect figure at=45 ° of places.

Fig. 7 a-7b single two points of variable pitch window shutter change the reflective and light guide effect figure of the high-order louvre blade of pitch and the louvre blade anglec of rotation when different sun altitude.

Fig. 8 a-8b single two points of variable pitch window shutter change the reflective and light guide effect figure of the low level louvre blade of pitch and the louvre blade anglec of rotation when different sun altitude.

Fig. 9 fixed knot changes the reflective and light guide effect figure of the high-order louvre blade of pitch and the louvre blade anglec of rotation apart from shutter when different sun altitude.

Figure 10 fixed knot changes the reflective and light guide effect figure of the low level louvre blade of pitch and the louvre blade anglec of rotation apart from shutter when different sun altitude;

Reflective and light guide effect figure after the light guide section of the high-order louvre blade of Figure 11 vertically moves down;

Reflective and light guide effect figure after the light guide section of Figure 12 low level louvre blade vertically moves down.

Detailed description of the invention

Below in conjunction with accompanying drawing specific embodiment, the invention will be further described.

Embodiment 1:

The Optimization Design of the guide-lighting louvre blade of a kind of shutter sunshade, be applied to and have on the high-order louvre blade from flooring more than 1.7m and the guide-lighting shutter of the sunshade from the low level louvre blade between the 1m to 1.7m of flooring, high-order louvre blade cross section is splayed, low level louvre blade cross section is Z-shaped, high-order louvre blade and low level louvre blade all have the light-reflecting portion 11 by outside and the light guide section by indoor, light-reflecting portion 11 and light guide section are arcwall face, and the method comprises the following steps:

A. determine a design point according to shutter axial dimension and louvre blade pitch requirements, setting design point place sun altitude is H _d, the angle of light-reflecting portion 11 outer end reflection ray and horizontal plane is γ on high-order louvre blade cross section _a, the angle of light-reflecting portion 11 summit place's reflection ray and horizontal plane is γ on high-order louvre blade cross section _b, the summit place reflection ray of high-order louvre blade light guide section 12 and the angle of horizontal plane are β on high-order louvre blade cross section _b, the inner reflection ray of high-order louvre blade light guide section 12 and the angle of horizontal plane are β on high-order louvre blade cross section _d1, partition plane 24 on low level louvre blade cross section between light-reflecting portion 11 and low level louvre blade light guide section 22 is δ with the angle of vertical plane ₂, on low level louvre blade cross section, the angle of light guide section 12 end point place's reflection ray and horizontal plane is β _c, the angle of the inner reflection ray of light guide section 12 and horizontal plane is β on low level louvre blade cross section _d2;

B. choose louver sheet be in open mode under horizontal attitude, namely attitude when pitch reaches maximum and do not deflect between each louvre blade, inner as measurement initial point on high-order louvre blade cross section, the horizontal range setting summit to high-order louvre blade the inner on actual high-order louvre blade cross section is L _bd, measure that initial point to the horizontal range of high-order louvre blade outer end is L, to measure initial point to the vertical distance on summit be h _ab;

C. the angle δ of light-reflecting portion string plane 11 ' that between summit and high-order louvre blade outer end, line is formed and vertical plane is determined on high-order louvre blade cross section according to following optimization formula ₁, light-reflecting portion 11 cambered surface radius R _ab, high-order louvre blade light guide section 12 cambered surface radius R _bd:

${\mathrm{\α}}_1=\frac{2H_d-({\mathrm{\β}}_b+{\mathrm{\β}}_{d1})}{4},$

${\mathrm{\δ}}_1=\frac{2H_d+({\mathrm{\γ}}_a+{\mathrm{\γ}}_b)}{4},$

${\stackrel{\‾}{R}}_{bd}=\frac{{\stackrel{\‾}{L}}_{bd}}{2{\mathrm{cos\α}}_1\sin \frac{{\mathrm{\β}}_{d1}-{\mathrm{\β}}_b}{4}},$

${\stackrel{\‾}{R}}_{ab}=\frac{1-{\stackrel{\‾}{L}}_{bd}}{2{\mathrm{sin\δ}}_1\sin \frac{{\mathrm{\γ}}_a-{\mathrm{\γ}}_b}{4}},$

In formula ${\stackrel{\‾}{R}}_{bd}=R_{bd}/L,{\stackrel{\‾}{R}}_{ab}=R_{ab}/L,{\stackrel{\‾}{L}}_{bd}=L_{bd}/L;$

D. after determining high-order louvre blade, the basis of high-order louvre blade is designed low level louvre blade, because the light-reflecting portion of low level louvre blade is identical with the light-reflecting portion of high-order louvre blade, only need the several parameter alpha determining low level louvre blade light guide section ₂and R _cd.The partition plane 24 of given low level louvre blade and the angle δ of vertical plane ₂, then the low level louvre blade light guide section string plane 22 ' that can be formed according to line between following optimization formula determination low level louvre blade cross section upper base point and low level louvre blade the inner and the angle α of horizontal plane ₂, light guide section 22 cambered surface radius R on low level louvre blade cross section _cd:

${\mathrm{\α}}_2=\frac{-2H_d+({\mathrm{\β}}_c+{\mathrm{\β}}_{d2})}{4},$

${\stackrel{\‾}{R}}_{cd}=\frac{{\stackrel{\‾}{L}}_{bd}(1-{\mathrm{tan\α}}_1{\mathrm{tan\δ}}_2)}{2(1+{\mathrm{tan\α}}_2{\mathrm{tan\δ}}_2){\mathrm{cos\α}}_2\sin \frac{{\mathrm{\β}}_{d2}-{\mathrm{\β}}_c}{4}},$

In formula ${\stackrel{\‾}{R}}_{cd}=R_{cd}/L.$

Fig. 1 shows cross-sectional view and the geometric parameter of the high-order louvre blade of shutter, high-order louvre blade is made up of light-reflecting portion 11 and high-order louvre blade light guide section 12 two parts, light-reflecting portion 11 and high-order louvre blade light guide section 12 are arcwall face, and in Fig. 1, a is the outer end of high-order louvre blade, d ₁for the inner of high-order louvre blade, high-order louvre blade summit b is the intersection of high-order louvre blade light-reflecting portion 11 and light guide section 12, and L is high-order louvre blade outer end a and inner d ₁between cross-sectional width, L _bdfor b is to the horizontal range of the inner d of high-order louvre blade, α ₁for high-order louvre blade summit b and inner d ₁the angle of the high-order louvre blade light guide section string plane 12 ' that formed of line and horizontal plane, δ ₁for the light-reflecting portion string plane 11 ' of high-order louvre blade and the angle of vertical plane, R _abfor the radius of high-order louvre blade light-reflecting portion 11, R _bdfor the radius of high-order louvre blade light guide section 12, h _abfor the vertical distance of high-order louvre blade outer end a to summit b, be referred to as the visual field barrier height of high-order louvre blade; Fig. 2 shows the cross-sectional view that shutter low level louvre blade and high-order louvre blade are combined, low level louvre blade is made up of light-reflecting portion 11, low level louvre blade light guide section 22 and partition plane 24 3 part, the light-reflecting portion 11 of low level louvre blade is identical with the light-reflecting portion 11 of high-order louvre blade, and the partition plane 24 of low level louvre blade is one is δ with vertical plane angle ₂clinoplain, the light guide section 22 of low level louvre blade is arcwall face, and outer end a, the summit b of low level louvre blade overlap with high-order louvre blade, the inner d of high-order louvre blade ₁with the inner d of low level louvre blade ₂coincide with d point, the end point c of low level louvre blade is low level louvre blade light guide section 22 and the junction cutting off plane 24, α ₂for end point c and the inner d of low level louvre blade ₂the angle of the low level louvre blade light guide section string plane 22 ' that formed of line and horizontal plane, R _cdfor the cambered surface radius of low level louvre blade light guide section 22.

Fig. 3 shows the high-order louvre blade cell cross-section figure of single two points of variable pitch window shutter and geometric parameter, wherein organize a main louvre blade 90, organizing two main louvre blades 90 ' is main louvre blade, 91 is group louvre blade, two adjacent main louvre blades 90, the pitch of 90 ' is D, organizing a louvre blade 91 can move up and down until the main louvre blade 90 of two adjacent main louvre series one between two adjacent main louvre blades, organize two main louvre blade 90 ' centre positions, i.e. D/2, the outdoor end of each louvre blade is followed successively by a, a ', a ", the indoor end of each louvre blade is followed successively by d, d ', d ", the incident ray of design point is followed successively by 41, 42, 43, each light is irradiated on the outer end of each louvre blade respectively, the sun altitude of design point is H _d, a place reflection ray 51 of louvre blade light-reflecting portion 11 is γ with the angle of horizontal plane _a, the b place reflection ray 52 of louvre blade light-reflecting portion 11 is γ with the angle of horizontal plane _b, the b place reflection ray 61 of louvre blade light guide section 12 is β with the angle of horizontal plane _b, the d of louvre blade light guide section 12 ₁place's reflection ray 62 is β with the angle of horizontal plane _d1.

Fig. 4 shows single two points of variable pitch window shutter low level louvre blade cell cross-section figure and geometric parameter, the same with Fig. 3, wherein organize a main louvre blade 90, group two main louvre blades 90 ' are main louvre blade, organizing a louvre blade 91 is time louvre blade, the pitch of two adjacent main louvre blades 90,90 ' is D, organizing a louvre blade 91 can move up and down until two adjacent main louvre blade 90,90 ' centre positions between two adjacent main louvre blades 90,90 ', i.e. D/2, the outer end of each louvre blade is followed successively by a, a ', a ", the inner of each louvre blade is followed successively by d ₂, d ₂', d ₂", the incident ray of design point is followed successively by 44,45, and the sun altitude of design point is H _d, the parameters of louvre blade light-reflecting portion 11 is identical with Fig. 3, and the c place reflection ray 63 of louvre blade light guide section 22 is β with the angle of horizontal plane _c, the d of louvre blade light guide section 22 ₂place's reflection ray 64 is β with the angle of horizontal plane _d2.

The transparency Г of shutter is generally determined by formula below:

$\mathrm{\Γ}=1-\frac{h_{ab}}{D}=1-\frac{1-{\stackrel{\‾}{L}}_{bd}}{\stackrel{\‾}{D}{\mathrm{tan\δ}}_1}$

In formula for shutter pitch ratio.

If it is fixed to get h _d=45 °, γ _a=81.8 °, γ _b=43 °, β _b=9.5 °, β _d1=61 °, β _c=52.6 °, β _d2=86.5 °, δ ₂=41 °, then there is α ₁=4.88 °, α ₂=12.28 °, δ ₁=53.7 °, determine D/L=1.17 if got, then have Г=80%.Fig. 5-6 shows the shape of cross section of high-order louvre blade and the low level louvre blade determined by above-mentioned data and the sun altitude H at design point _dreflective and light guide effect figure when variable pitch window shutter is in D/2 pitch in=45 ° of situations, wherein 4 represent direct sunlight, 5 represent reverberation, 6 represent lead-in light, as seen from the figure, the sunlight irradiated on it can be reflexed to outdoor by the reflective cambered surface 11 of high-order louvre blade and low level louvre blade well, the sunlight exposing to the high-order louvre blade light guide section 12 of high-order louvre blade is fed to indoor, the minimum angle of this importing light and horizontal plane is about 10 °, this show high-order louvre blade light guide section 12 can well by sunlight gathering to indoor vertical-depth, the sunlight exposing to low level louvre blade light guide section 22 is fed to indoor, the minimum angle of this importing light and horizontal plane is 54 °, this show low level louvre blade light guide section 22 can well by sunlight gathering near windows to indoor top in the middle part of.

Fig. 7 a ~ Fig. 8 b shows by designing single two points of variable pitch window shutter that the high-order louvre blade that obtains and low level louvre blade form as stated above at different sun altitude H _dreflective and light guide effect figure in situation, D/L=1.57 herein, then there is maximum transparency Г=86%, as seen from the figure, no matter the sun is in eminence or lower, by the change of the pitch of the louvre blade of variable pitch window shutter and the means of louvre blade rotary fine adjustment, make the light-reflecting portion 11 of high-order louvre blade and low level louvre blade well the sunlight irradiated on it can both be reflexed to outdoor, eliminating on the sunlight irradiated on it can be reflexed to a louvre blade by the Z-shaped louvre blade of low level when the sun is in lower in the past the back side causes dazzle and heat to flow into indoor defect, the minimum angle that the sunlight exposing to high-order louvre blade light guide section 12 is fed to indoor light and horizontal plane is about 10 °, maximum angle is about 60 °, this show high-order louvre blade light guide section 12 can well by the middle part of sunlight gathering to indoor ceiling to vertical-depth, the minimum angle that the sunlight exposing to low level louvre blade light guide section 22 is fed to indoor light and horizontal plane is about 52 °, maximum angle is less than 90 °, this show low level louvre blade light guide section 22 can well by sunlight gathering near windows to ceiling in the middle part of, the back of an adjacent louvre can not be reflexed to again and cause dazzle simultaneously, as seen from the figure, about minimum transparency Г=63% of shutter, dazzle can be eliminated by this variable pitch window shutter people, obtain uniform daylight illumination, satisfied indoor and outdoor eye contact can also be obtained.

By design as stated above the high-order louvre blade that obtains and low level louvre blade be applied to fixed knot apart from shutter time, setting D/L=0.85, then there is maximum transparency Г=75%, Fig. 9-10 shows the reflective and light guide effect figure of shutter in different sun altitude H situation of this pitch, as seen from the figure, the fixed knot be made up of above-mentioned high-order louvre blade and low level louvre blade also can reach the effect similar with above-mentioned single variable pitch window shutter apart from shutter.

Embodiment 2:

If it is fixed to get h _d=45 °, γ _a=82 °, γ _b=40 °, β _b=5 °, β _d1=62 °, β _c=50 °, β _d2=85 °, δ ₂=40 °, then there is α ₁=5.75 °, α ₂=11.25, δ ₁=53 °, ${\stackrel{\‾}{R}}_{ab}=1.72,{\stackrel{\‾}{R}}_{bd}=1.02,{\stackrel{\‾}{R}}_{cd}=\mathrm{1.31.}$ All the other are with embodiment 1.

Embodiment 3:

In like manner, determine if got h _d=45 °, γ _a=75 °, γ _b=40 °, β _b=10 °, β _d1=62 °, β _c=52 °, β _d2=86.5 °, δ ₂=40 °, then there is α ₁=4.5 °, α ₂=12.13 °, δ ₁=51.25 °, ${\stackrel{\‾}{R}}_{ab}=0.84,{\stackrel{\‾}{R}}_{bd}=1.78,{\stackrel{\‾}{R}}_{cd}=\mathrm{2.16.}$ All the other are with embodiment 1.

Embodiment 4:

In like manner, determine if got h _d=35 °, γ _a=85.5 °, γ _b=46.5 °, β _b=6 °, β _d1=57.5 °, β _c=47.5 °, β _d2=82.5 °, δ ₂=44 °, then there is α ₁=1.63 °, α ₂=15 °, δ ₁=50.5 °, all the other are with embodiment 1.

The light guide section changing the guide-lighting louvre blade of sunshade accounts for the ratio of whole louvre blade cross-sectional width, utilizes above-mentioned formula can obtain the guide-lighting louvre blade of required sunshade.

Embodiment 5:

After completing each step of optimal design, the light guide section of high-order louvre blade is done vertical moving down with the light guide section of low level louvre blade, a branch of reverberation of the light guide section of high-order louvre blade and the light guide section of low level louvre blade and the minimum angle of horizontal plane can be adjusted, Figure 11 with Figure 12 moves down rear acquisition by vertical for the light guide section of the louvre blade in Fig. 5 with Fig. 6, by the high-order louvre blade light guide section in Fig. 5 and Fig. 6 design, low level louvre blade light guide section original position uses dotted line 12 respectively, 22 represent, the high-order louvre blade light guide section of Figure 11 and Figure 12, low level louvre blade light guide section uses solid line 12a respectively, 22a represents, as seen from the figure, a branch of reflection ray of high-order louvre blade light guide section 12 in Fig. 5 and the minimum angle of horizontal plane are 9.52 °, a branch of reflection ray of low level louvre blade light guide section 22 in Fig. 6 and the minimum angle of horizontal plane are 53 °, at the high-order louvre blade light guide section 12 of Fig. 5 and Fig. 6, low level louvre blade light guide section 22 vertically moves down rear become respectively 16.2 ° of Figure 11 and 56.3 ° of Figure 12, in addition, occur after the high-order louvre blade light guide section 12 of Fig. 5 becomes the high-order louvre blade light guide section 12a of Figure 11 after moving down that high-order louvre blade cuts off plane 14, thus the high-order louvre blade cross section in the present embodiment is also in splayed, and it is identical with the angle value of vertical plane with the partition plane 24 of the angle value of vertical plane and the low level louvre blade of Fig. 6 that this high-order louvre blade cuts off plane 14.All the other are with embodiment 1.

Claims (8)

1. the Optimization Design of the guide-lighting louvre blade of shutter sunshade, be applied on the guide-lighting shutter of the sunshade with high-order louvre blade and low level louvre blade, high-order louvre blade and low level louvre blade all have the light-reflecting portion by outside and the light guide section by indoor, light-reflecting portion and light guide section are arcwall face, it is characterized in that comprising the following steps:

A. determine a design point according to shutter axial dimension and louvre blade pitch requirements, setting design point place sun altitude is H _d, the angle of light-reflecting portion outer end reflection ray and horizontal plane is γ on high-order louvre blade cross section _a, the angle of light-reflecting portion summit place's reflection ray and horizontal plane is γ on high-order louvre blade cross section _b, the summit place reflection ray of light guide section and the angle of horizontal plane are β on high-order louvre blade cross section _b, the inner reflection ray of light guide section and the angle of horizontal plane are β on high-order louvre blade cross section _d1, partition plane on low level louvre blade cross section between light-reflecting portion and light guide section and vertical plane angle be δ ₂, on low level louvre blade cross section, at the bottom of light guide section, the angle of some place's reflection ray and horizontal plane is β _c, the angle of the inner reflection ray of light guide section and horizontal plane is β on low level louvre blade cross section _d2;

B. choose louver sheet be in open mode under horizontal attitude, inner as measuring initial point on high-order louvre blade cross section, the horizontal range setting extremely high-order louvre blade the inner, summit on actual high-order louvre blade cross section is L _bd, to measure initial point to the horizontal range of high-order louvre blade outer end be L;

C. the angle α of string plane that between summit and high-order louvre blade the inner, line is formed and horizontal plane is determined on high-order louvre blade cross section according to following optimization formula ₁, between summit and high-order louvre blade outer end, line is formed on high-order louvre blade cross section string plane and vertical plane angle δ ₁, light-reflecting portion cambered surface radius R _ab, light guide section cambered surface radius R _bd:

${\mathrm{\α}}_1=\frac{2H_d-({\mathrm{\β}}_b+{\mathrm{\β}}_{d1})}{4}$

${\mathrm{\δ}}_1=\frac{2H_d+({\mathrm{\γ}}_a+{\mathrm{\γ}}_b)}{4}$

${\stackrel{\‾}{R}}_{bd}=\frac{{\stackrel{\‾}{L}}_{bd}}{2{\mathrm{cos\α}}_{1}sin\frac{{\mathrm{\β}}_{d1}-{\mathrm{\β}}_b}{4}}$

${\stackrel{\‾}{R}}_{ad}=\frac{1-{\stackrel{\‾}{L}}_{bd}}{2{\mathrm{sin\δ}}_{1}sin\frac{{\mathrm{\γ}}_a-{\mathrm{\γ}}_b}{4}}$

In formula ${\stackrel{\‾}{R}}_{bd}=R_{bd}/L,{\stackrel{\‾}{R}}_{ab}=R_{ab}/L,{\stackrel{\‾}{L}}_{bd}=L_{bd}/L.$

D. according to the string plane of line formation between following optimization formula determination low level louvre blade cross section upper base point and low level louvre blade the inner and the angle α of horizontal plane ₂, light guide section (22) cambered surface radius R on low level louvre blade cross section _cd:

${\mathrm{\α}}_2=\frac{-2H_d+({\mathrm{\β}}_c+{\mathrm{\β}}_{d2})}{4}$

${\stackrel{\‾}{R}}_{cd}=\frac{{\stackrel{\‾}{L}}_{bd}(1-{\mathrm{tan\α}}_1{\mathrm{tan\δ}}_2)}{2(1+{\mathrm{tan\α}}_2{\mathrm{tan\δ}}_2){\mathrm{cos\α}}_2\sin \frac{{\mathrm{\β}}_{d2}-{\mathrm{\β}}_c}{4}}$

In formula ${\stackrel{\‾}{R}}_{cd}=R_{cd}/L.$

2. the Optimization Design of the guide-lighting louvre blade of sunshade according to claim 1, is characterized in that span be 0.5 ~ 0.8.

3. the Optimization Design of the guide-lighting louvre blade of sunshade according to claim 1, is characterized in that design point place sun altitude H _dspan is 35 ° ~ 45 °.

4. the Optimization Design of the guide-lighting louvre blade of sunshade according to claim 1, is characterized in that γ _aspan be 70 ° ~ 88 °, γ _bspan be 40 ° ~ 50 °.

5. the Optimization Design of the guide-lighting louvre blade of sunshade according to claim 1, is characterized in that β _bspan be 0 ~ 20 °, β _d1span be 55 ° ~ 85 °.

6. the Optimization Design of the guide-lighting louvre blade of sunshade according to claim 1, is characterized in that β _cspan be 45 ° ~ 55 °, β _d2span be 80 ° ~ 88 °.

7. the Optimization Design of the guide-lighting louvre blade of sunshade according to any one of claim 1 to 6, is characterized in that δ ₂span be 10 ° ~ 45 °.

8. the Optimization Design of the guide-lighting louvre blade of sunshade according to any one of claim 1 to 6, it is characterized in that after completing steps A-D, the light guide section of high-order louvre blade is done vertical down translation with the light guide section of low level louvre blade, increases the position drop between light guide section and light-reflecting portion.