CN108104300B - Porous permeable fresh air preheating solar wall - Google Patents

Abstract

The invention discloses a porous permeable fresh air preheating solar wall, which includes a heat collection and heat storage system and an airflow conveying system; the heat collection and heat storage system includes a solar wall panel, and a space is left between the solar wall panel and the building outer wall. an air space; an air cabin communicated with the air space is arranged above the solar wall panel, an air outlet is provided on the outer wall of the air cabin, and an air outlet is movably installed on the air outlet for adjusting the opening of the air outlet. The air guide plate; the air inlet holes are distributed on the solar wall plate, the outer wall of the solar wall plate is provided with a heat-absorbing coating; the outer wall of the solar wall plate is provided with a shading device; the airflow conveying system It includes a fresh air duct, an air valve and an axial flow fan are installed on the fresh air duct, an air supply port is arranged on the side wall of the fresh air duct, and one end of the fresh air duct is communicated with the air cabin. The invention can not only obtain fresh air in winter but also maintain a suitable indoor temperature, and can not only meet the requirements of energy saving but also meet the requirements of indoor air quality.

Description

Porous permeable fresh air preheating solar wall

technical field

The invention belongs to the field of solar thermal utilization and building heating, and in particular relates to a porous permeable fresh air preheating and heating integrated solar wall system, which is used for fresh air preheating and indoor heating in classrooms, office buildings, etc. in winter, and mainly solves the problem of opening large windows in winter. difficult, poor indoor air quality and other practical problems.

Background technique

my country's building energy consumption accounts for about a quarter of the total social energy consumption, of which heating and air conditioning energy consumption accounts for 40% to 50% of building energy consumption. Solar energy is an inexhaustible clean energy, so using solar energy to improve the indoor thermal environment of buildings can effectively reduce conventional energy consumption.

The cold air infiltration heat load is the main part of the heating load in winter, which often requires the building to have good airtightness. The following problems are: small indoor fresh air volume and serious air pollution, which directly affect the work and learning efficiency of indoor personnel. Therefore, it is difficult for classrooms, offices and other buildings to obtain fresh air in winter to maintain indoor air quality and reduce cold air infiltration to reduce heating load. Finding a balance between indoor air quality and saving heating energy is the focus of research on such issues.

At present, many scholars have done a lot of in-depth research on the commonly used passive solar technology such as direct benefit windows, heat collection and heat storage walls and additional solar cells. The results show that these passive solar heating technologies can effectively improve indoor temperature and reduce heating heat in winter. load, but these technologies are difficult to take into account the improvement of indoor air quality in winter. The existing fresh air heat recovery, preheating and other systems can improve indoor air quality, but the equipment system is more complicated and the investment is high.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a porous permeable fresh air preheating solar wall based on passive solar energy utilization, which can simultaneously solve the dual problems of improving indoor air quality in winter and reducing heating energy consumption.

In order to realize the above-mentioned tasks, the present invention adopts the following technical solutions:

A porous permeable fresh air preheating solar wall, comprising a heat collection and heat storage system and an airflow conveying system;

The heat collection and heat storage system includes a solar wall panel arranged outside the building exterior wall and parallel to the building exterior wall, and an air space is left between the solar wall panel and the building exterior wall; the upper part of the solar wall panel is arranged There is an air cabin that is communicated with the air space, an exhaust port is provided on the outer wall of the air cabin, and a deflector for adjusting the opening of the exhaust port is movably installed on the exhaust port; There are air intake holes whose opening direction is inclined to the horizontal plane, and the outer wall of the solar wall panel is provided with a heat-absorbing coating; the outer wall of the solar wall panel is provided with a shading device for blocking sunlight;

The air conveying system includes a fresh air duct arranged on the upper part of the room in the building, a damper and an axial flow fan are installed on the fresh air duct, an air supply port is arranged on the side wall of the fresh air duct, and one end of the fresh air duct is opened on the outer wall of the building. The air inlet on the upper is communicated with the air compartment.

Further, the outer surface of the solar wall panel is provided with a convex part and a concave part, and the air inlet hole is opened on the convex part.

Further, the solar wall panel adopts galvanized steel sheet, and the solar wall panel is connected with the building exterior wall by bolts.

Further, the middle part of the exhaust port is provided with a rotating shaft parallel to the horizontal plane, and the guide plate is mounted on the rotating shaft.

Further, in the fresh air duct, an air filter screen and a fire damper are arranged in sequence between the building outer wall and the air valve, and a wet film humidifier and a muffler are arranged in sequence on the rear side of the axial flow fan; the axial flow fan Both ends of the duct are connected in series on the fresh air duct through a flexible connecting pipe.

Further, an adjusting valve for adjusting the air volume is installed on the air supply port.

Further, the outside of the air inlet is provided with a shielding edge, and the shielding edge includes an inclined plate and two end plates, wherein the inclined plate is inclined to the horizontal plane, and one side of the inclined plate is fixed on the solar wall above the air intake hole. On the board, there is a gap between the other side and the air inlet hole; the end board is located at both ends of the inclined board, one side of the end board is connected with the solar wall board, and the other side is connected with the end of the inclined board.

Further, the shading device includes a pair of support frames arranged at the top of the outer wall of the solar wall panel, a roller is installed between the pair of support frames, and the roller shaft is parallel to the solar wall panel; Drawcord-driven breathable blackout roller blinds.

Further, the breathable light-shielding roller blind includes a pair of soft sidebands, a plurality of rectangular light-shielding sheets are arranged at intervals between the pair of sidebands, and the light-shielding sheets are inclined to the horizontal plane; the upper edge of the light-shielding sheet is The length direction of the shading sheet is provided with a connecting hole, and a connecting rope is arranged through the connecting hole, and both ends of the connecting rope are respectively connected with the pair of sidebands.

The present invention has the following technical characteristics:

1. The fresh air preheating effect is good

Compared with the traditional Trombe wall, the solar wall can send the preheated fresh air into the room through the ventilation system, which effectively improves the indoor air quality, keeps the indoor environment comfortable, and is beneficial to the health of indoor personnel. Combined with the airflow delivery system, not only can the fresh air flow, flow rate and temperature be controlled by axial fans and dampers, but also heated air can be delivered to the room at any location by using air supply ducts. In this way, not only the south-facing rooms can use solar energy for heating, but also the north-facing rooms can enjoy the warmth of the sun, which better meets the needs of building heating, which is the uniqueness of the porous solar wall system.

2. Higher solar thermal utilization efficiency

Compared with the traditional passive glass heat collection method, the solar heat utilization efficiency of the present invention is higher, because the glass will reflect 15% of sunlight and thus weaken the utilization of sunlight, and the porous solar wall panel in this design can Absorb and utilize 80% of solar energy.

3. Prevent indoor overheating in summer

By using the breathable shading roller blinds, the solar radiation entering the air layer in summer can be reduced; when the air in the interlayer is heated by convection and radiation, the temperature increases and the density decreases, and the hot pressure exhaust effect is formed by the buoyancy force, which plays a role in The role of exhaust heat dissipation.

4. Simple structure and wide range of use

Because the solar wall is simple in structure, beautiful and durable, and easy to maintain and manage, it has a wide range of applications and can be used in any building that needs auxiliary heating, ventilation or supplementary fresh air, including industrial, commercial, residential, office, school, warehouse, etc.

5. The operating condition control is easy to operate

According to different seasonal working conditions, users can make corresponding adjustments according to the outdoor temperature, open and close corresponding components, and realize automatic control according to working conditions. In spring, summer and autumn, the system mainly focuses on removing waste heat to cool down. The deflector of the exhaust system is opened, the ventilation shading shutter is lowered, and the air valve of the air supply system is induced to close; when the outdoor temperature is lower than 5 ℃, the winter working condition When it is started, the system mainly uses solar energy to preheat the fresh air. The deflector of the exhaust system closes the ventilating shading shutter and raises it, and induces the air valve of the air supply system to open. Throughout the process, the dampers, deflectors and breathable blackout roller blinds are manually operated.

6. Good economic and environmental benefits

The solar wall fresh air preheating heating system uses porous solar wall panels to collect heat, and the power system has no other power equipment except the fan, and is integrated with the building exterior wall, so the cost is low; Operation to reduce building operating costs; rational and efficient use of solar energy, a clean energy source, to reduce environmental pollution.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the top view of the A-A section of the system of the present invention;

3 is a schematic diagram of the working state of each component of the present invention under summer conditions;

4 is a schematic diagram of the working state of each component of the present invention under winter conditions;

Fig. 5 is the front view of the multi-space solar wall panel of the present invention;

Fig. 6 is the side view of the multi-space solar wall panel of the present invention;

7 is a cross-sectional view of a multi-space solar wall panel of the present invention;

Fig. 8 is the installation detail view of the multi-space solar wall panel of the present invention;

Fig. 9 is the installation detail view of the breathable shading roller blind of the present invention;

FIG. 10 is a schematic structural diagram of the air-permeable shading roller blind of the present invention.

The symbols in the figure represent: 1—flash shield, 2—breathable shading roller shutter, 3—solar wall panel, 4—air inlet, 41—inclined plate, 42—end plate, 5—fresh air duct, 6—deflector , 7—exhaust port, 8—air inlet, 9—air filter, 10—air valve, 11—soft connecting pipe, 12—axial flow fan, 13—wet film humidifier, 14—muffler, 15—fireproof Valve, 16—regulating valve, 17—air supply port, 18—air interlayer, 19—air cabin, 20—insulation layer, 21—building exterior wall, 22—bolt and nut, 23—glass tape, 24—support frame, 25 - Pulling rope, 26 - rotating shaft, 27 - side band, 28 - shading sheet, 29 - connecting rope.

Detailed ways

As shown in FIGS. 1 to 10 , the present invention discloses a porous permeable fresh air preheating solar wall, including a heat collection and heat storage system and an airflow conveying system;

The heat collection and heat storage system includes a solar wall panel 3 arranged outside the building exterior wall 21 and parallel to the building exterior wall 21, an air space 18 is left between the solar wall panel 3 and the building exterior wall 21, and the solar wall panel 3 is fixedly connected with the building exterior wall 21 through bolts and nuts 22; an air chamber 19 communicated with the air interlayer 18 is arranged above the solar wall panel 3, and an air outlet 7 is provided on the outer wall of the air chamber 19, A deflector 6 for adjusting the opening of the exhaust port 7 is movably installed on the exhaust port 7. The baffle plate 6 can completely block the exhaust port 7 or partially block the exhaust port 7 to meet the needs of Use requirements under different working conditions; the solar wall panel 3 is distributed with air intake holes 4 whose opening directions are inclined to the horizontal plane, and the air intake holes 4 point to the ground direction, for example, at an angle of 30° to 60° with the horizontal plane; The outer wall of the solar wall panel 3 is provided with a heat-absorbing coating, which can be a multi-layer black paint brushed on the solar wall panel 3; High solar absorption rate.

The outer wall of the solar wall panel 3 is provided with a shading device for blocking sunlight, and the shading device is mainly used to block sunlight in summer to reduce the absorption of solar energy by the solar wall panel 3; the shading device adopts a retractable structure. , folds away when not in use in winter and unfolds in summer.

The air conveying system includes a fresh air duct 5 arranged in the upper part of the room in the building, for example, the fresh air duct 5 can be arranged above the ceiling of the room; an axial fan 12 is installed on the fresh air duct 5, and a side wall of the fresh air duct 5 is provided with The air supply port 17 and one end of the fresh air duct 5 are communicated with the air chamber 19 through the air inlet 8 opened on the building outer wall 21 .

As shown in FIG. 9 , the shading device includes a pair of support frames 24 arranged at the top of the outer wall of the solar wall panel 3 , and a roller is installed between the pair of support frames 24 , and the roller shaft is parallel to the solar wall panel 3 The roller is provided with the breathable shading roller blind 2 driven by the drawstring 25; in summer, the breathable shading roller blind 2 is lowered by the drawstring 25; around the roller. There are gaps on the air-permeable shading roller blinds 2 to allow outside air to pass through the gaps and enter the air space layer 18 from the air inlet holes 4 .

Specifically, as shown in FIG. 10 , the breathable light-shielding roller blind 2 includes a pair of soft sidebands 27 , and a plurality of rectangular light-shielding sheets 28 are arranged at intervals between the pair of sidebands 27 . 28 is inclined to the horizontal plane, for example, at an angle of 30° to 60° with the horizontal plane; the shading sheet 28 is provided with a connecting hole along the length direction of the shading sheet 28, and a connecting rope 29 is arranged through the connecting hole. The two ends are respectively connected with the pair of sidebands 27 ; two connecting ropes 29 may be provided on each light shielding sheet 28 to prevent the light shielding sheet 28 from rotating relative to the sidebands 27 . The side straps 27 may be rubber straps or plastic straps. During installation, one end of the pair of sidebands 27 is connected to the roller, and then the drawstring 25 is also connected to the roller, so that by pulling the drawstring 25, the ventilating shade 2 can be retracted or lowered. The above structure of the ventilating shading roller blind 2 involves leaving a gap for ventilation between the adjacent shading sheets 28 , which facilitates the introduction of outside air and can effectively block sunlight from irradiating on the solar wall panel 3 .

Preferably, as shown in FIG. 1 , a rain shield 1 is provided above the ventilated shading roller blind 2 to protect the ventilated shading roller blind 2 when it is folded, so as to avoid weathering caused by rain and shorten its life.

Optionally, as shown in FIG. 7 , the outside of the air inlet 4 is provided with a shielding edge, and the shielding edge includes an inclined plate 41 and two end plates 42 , wherein the inclined plate 41 is disposed inclined to the horizontal plane, and the inclined plate 41 One side is fixed on the solar wall panel 3 above the air inlet 4, and there is a gap between the other side and the air inlet 4; the end plate 42 is located at both ends of the inclined plate 41, One side is connected to the solar wall panel 3 , and the other side is connected to the end of the inclined plate 41 . This structure can effectively prevent rainwater from entering the air space layer 18, and also play a role in preventing dust to a certain extent.

5 to 7 are schematic structural diagrams of an optional solar wall panel 3 . The outer surface of the solar wall panel 3 is provided with a convex part and a concave part, and the air inlet hole 4 is opened on the convex part. The solar wall panel 3 is made of galvanized steel sheet, and the solar wall panel 3 is connected with the building exterior wall 21 through bolts.

For example, the solar wall panel 3 can be formed by splicing small pieces of punched porous galvanized steel sheet, and its surface is designed into a regular concave-convex shape, that is, the distance between the protruding part and the building exterior wall 21 is larger. , and the distance between the depression and the building exterior wall 21 is smaller, and this structure is conducive to the penetration of fresh air. A part for fixing and connecting is reserved at the edge of each small steel plate. According to the user's demand for fresh air volume, the required number of steel plates can be reasonably calculated. By drilling threaded holes at the edge of the steel plate and matching the bolts and nuts 22, more pieces of steel plates assembled together.

The air compartment 19 on the upper part of the solar wall panel 3 can be a hollow rectangular body compartment without a bottom surface, the bottom of which is communicated with the air interlayer 18, and the air compartment 19 is used to collect the hot air that has reached the preheating effect. The connection part of the air chamber 19 and the solar wall panel 3 is sealed with glass tape 23, and the joints of pipes and masonry are sealed with glass glue to ensure the airtightness of the cavity and prevent external air from entering the system, causing The system is not working well.

FIG. 3 is a schematic diagram of the working state of each component of the present invention under a summer working condition. In summer, open the deflector 6 on the exhaust port 7 to make the air chamber 19 communicate with the outside world, then put down the ventilating shade 2, and close the air valve 10. At this time, the hot air is under the effect of thermal pressure and wind pressure. It is discharged to the atmosphere through the exhaust port 7.

After putting down the breathable shading roller blind 2, the breathable shading roller blind 2 reflects most of the solar radiation, and only a small amount of solar radiation will penetrate the breathable shading roller blind 2 and fall on the solar wall panel 3, so the air space layer 18 The air in the air is hardly heated by the solar wall panel 3, so that the air in the air space layer 18 can better absorb the heat of the thermal insulation layer 20 on the outer wall 21 of the building. After the air in the air interlayer 18 is heated, it rises under the action of heat pressure and wind pressure, and is discharged into the atmosphere through the exhaust port 7 on the upper part of the air chamber 19 through the deflector 6 to form a convection cycle. It absorbs the heat of the thermal insulation layer 20 on the building outer wall 21, reduces the temperature of the outer surface of the building outer wall 21, and further reduces the heat gain through the building outer wall 21 and reduces the energy consumption of the air conditioner.

Further, in the fresh air duct 5, an air filter 9 and a fire damper 15 are arranged in sequence between the building outer wall 21 and the air valve 10, and a wet film humidifier 13 and a muffler are arranged on the rear side of the axial flow fan 12 in sequence. 14; both ends of the axial flow fan 12 are connected in series on the fresh air duct 5 through a flexible connecting pipe 11, and the flexible connecting pipe 11 can be a corrugated pipe. A regulating valve 16 for adjusting the air volume is installed on the air supply port 17 .

Optionally, an installation method of the deflector 6 may be as follows: a rotating shaft 26 parallel to the horizontal plane is provided in the middle of the exhaust port 7 , and the deflector 6 is installed on the rotating shaft 26 . The rotating shaft 26 can be rotated by a motor to adjust the opening of the exhaust port 7 .

FIG. 4 is a schematic diagram of the working state of the present invention under winter conditions. When the outdoor daily average temperature is lower than 5 ℃, open the air valve 10, open the axial flow fan 12, close the deflector 6, make the deflector 6 completely block the exhaust port 7, and raise the ventilation shading shutter 2, At this time, the outdoor fresh air enters the air space 18 through the air inlet 4, absorbs the heat of the solar wall panel 3, and enters the indoor air supply system through the fresh air duct 5 under the action of wind pressure and heat pressure.

The solar wall panel 3, which has a rough surface and is coated with an endothermic coating, absorbs solar radiation and heats the air in the air interlayer 18, so that the air in the air interlayer 18 is heated and rises under the action of thermal pressure difference and buoyancy , reaches the air chamber 19, and aggregates the hot air. At this time, due to the induction air supply method, the pressure in the fresh air duct 5 is relatively high, and the heated air passes through the air inlet 8, the air filter 9, and the fire prevention. The valve 15, the axial flow fan 12, the wet film humidifier 13, the muffler 14, the regulating valve 16, and the air supply port 17 are sent into the room. In this process, the fresh air is heated through the air interlayer 18, which increases the temperature of the fresh air supply, increases the indoor heat gain, reduces the fresh air load, improves the indoor air quality in winter and reduces the heating energy consumption.

The present invention will be further described below through specific examples.

Taking the climatic conditions of Lhasa as an example, check the "Practical Heating and Air Conditioning Design Manual (Second Edition)" for the meteorological parameters of Lhasa, and the outdoor dry bulb temperature of ventilation in winter is -5.1 ℃. There is a room with a porous solar wall outside the south wall. The room is 2.7m long, 2.4m wide and 2.7m high. The multi-space solar wall panel is 2.1m high, 1.8m wide and 0.01m thick. The diameter of the holes of the perforated solar panel is 20mm, and the number of holes is 17×12 (row×column). The solar radiation intensity is 430W/m ² , and it is assumed that the solar absorptivity of the porous solar wall panel is 0.89.

①Introduction of fresh air volume

L＝V1 _× A1 _× 3600＝n× _V2 × _A2 ×3600

In the formula, L‐‐‐ the fresh air volume entering the room through the air supply duct (m ³ /h);

V ₁ ‐‐‐air supply velocity at the outlet of the fresh air duct (m/S);

A ₁ ‐‐‐ the cross-sectional area of the outlet of the fresh air duct (m ² ) its value is 0.0144m ² ;

n‐‐‐ the number of air intake holes (pieces), its value is 204;

V ₂ ‐‐ the air inlet speed of the air inlet (m/S);

A ₂ ‐‐ the cross-sectional area (m ² ) of the air inlet hole is 0.0004m ² .

②Preheating effect on outdoor air

The radiant heat absorbed by the porous solar wall panel is:

Q=a×E×F

In the formula Q‐‐‐ the radiant heat absorbed by the porous solar panel (W);

E‐‐ solar radiation intensity (W/m ² ), its value is 430W/m ² ;

F‐‐‐perforated solar panel area (m ² ), its value is 3.78m ² ;

a‐‐‐ the absorption rate of the sun by the porous solar panel, its value is 0.89.

Get Q=1446.61W.

Q=3600 ^-1 ×c×ρ×L×(t _i -t _j )

In the formula Q‐‐‐ the radiant heat absorbed by the porous solar panel (W);

c‐‐‐mass specific heat of air, its value is 1010J/(kg.℃);

ρ‐‐density of preheated air (kg/m ³ );

L‐‐ the volume of fresh air entering the room through the air supply duct (m ³ /h);

t _i ‐‐‐ the temperature of the preheated air (°C);

t _j ‐‐‐ventilated outdoor dry bulb temperature in winter, its value is -5.1 ℃.

Check the "National Civil Construction Engineering Design Technical Measures 2009 Edition" the fresh air speed should be 2.0 ~ 4.5m/s.

Table 1. Supply air volume and supply air temperature under different air supply speeds of fans

Check "Practical Heating and Air Conditioning Design Manual Second Edition"

Table 2. Fresh air demand for ventilation

Application Personnel density (P/100m²) Fresh air demand (L/S.P) classroom 50 8 office 7 10

The area of the room is 6.48 m ² , and referring to Table 2, the population density of the classroom is 3 to 4 people. Then the required fresh air volume is 24-32L/S, that is, 86.4-115.2m ³ /h; for the office, the personnel density is 1 person. Then the required fresh air volume is 10L/S, that is, 36m ³ /h. Referring to Table 1, when the fan air supply speed is 2.0-2.4m/S, the total fresh air volume is 101.66-122.40m ³ /h, which can meet the needs of classroom personnel for fresh air volume; when the fan air supply speed is 2.0m/S When left and right, the total fresh air volume is about 101.66m ³ /h, which can meet the demand of office personnel for fresh air volume. As for the preheating effect of fresh air, when the air supply speed of the fan is 2.0～3.6m/S, the air temperature of the supply air can reach 18.6℃～41.4℃. Therefore, the system can not only meet the demand for fresh air volume, but also achieve the effect of preheating fresh air.

Claims (4)

1. A porous permeable fresh air preheating solar wall is characterized by comprising a heat collection and storage system and an air flow conveying system;

the heat collection and storage system comprises a solar wallboard (3) which is arranged outside the building outer wall (21) and is parallel to the building outer wall (21), and an air space (18) is reserved between the solar wallboard (3) and the building outer wall (21); an air cabin (19) communicated with the air interlayer (18) is arranged above the solar wallboard (3), an exhaust port (7) is formed in the outer wall of the air cabin (19), and a guide plate (6) used for adjusting the opening degree of the exhaust port (7) is movably mounted on the exhaust port (7); air inlets (4) with opening directions inclined to the horizontal plane are distributed on the solar wallboard (3), and a heat absorption coating is arranged on the outer wall of the solar wallboard (3); a shading device for shading sunlight is arranged on the outer wall of the solar wallboard (3);

the air flow conveying system comprises a fresh air pipeline (5) arranged at the upper part of a room in a building, an air valve (10) and an axial flow fan (12) are installed on the fresh air pipeline (5), an air supply outlet (17) is formed in the side wall of the fresh air pipeline (5), and one end of the fresh air pipeline (5) is communicated with an air cabin (19) through an air inlet (8) formed in the outer wall (21) of the building;

the outer surface of the solar wallboard (3) is provided with a convex part and a concave part, and the air inlet hole (4) is formed in the convex part;

the solar wallboard (3) is made of galvanized steel sheets, and the solar wallboard (3) is connected with the building outer wall (21) through bolts;

a shielding edge is arranged outside the air inlet hole (4), the shielding edge comprises an inclined plate (41) and two end plates (42), the inclined plate (41) is arranged in an inclined manner on the horizontal plane, one side of the inclined plate (41) is fixed on the solar wallboard (3) above the air inlet hole (4), and a gap is reserved between the other side of the inclined plate and the air inlet hole (4); the end plates (42) are positioned at two ends of the inclined plate (41), one side of each end plate (42) is connected with the solar wallboard (3), and the other side of each end plate is connected with the end part of the inclined plate (41);

the shading device comprises a pair of supporting frames (24) arranged at the top end of the outer wall of the solar wallboard (3), a rolling shaft is arranged between the pair of supporting frames (24), and the rolling shaft is parallel to the solar wallboard (3); the roller is provided with a breathable shading roller shutter (2) driven by a pull rope (25);

the air-permeable shading roller shutter (2) comprises a pair of soft side bands (27), a plurality of rectangular shading sheets (28) are arranged between the pair of side bands (27) at intervals, and the shading sheets (28) are inclined to the horizontal plane; the anti-dazzling screen is characterized in that a connecting hole is formed in the anti-dazzling screen (28) along the length direction of the anti-dazzling screen (28), a connecting rope (29) penetrates through the connecting hole, and two ends of the connecting rope (29) are connected with the pair of side bands (27) respectively.

2. The porous permeable fresh air preheating solar wall as claimed in claim 1, wherein the middle part of the exhaust port (7) is provided with a rotating shaft (26) parallel to the horizontal plane, and the deflector (6) is installed on the rotating shaft (26).

3. The porous permeable fresh air preheating solar wall as claimed in claim 1, characterized in that an air filter screen (9) and a fire damper (15) are sequentially arranged between the building outer wall (21) and the air valve (10) in the fresh air pipeline (5), and a wet film humidifier (13) and a silencer (14) are sequentially arranged on the rear side of the axial flow fan (12); two ends of the axial flow fan (12) are connected in series on the fresh air pipeline (5) through a flexible connecting pipe (11).

4. The solar wall with porous and permeable fresh air preheating function as claimed in claim 1, wherein the air supply outlet (17) is provided with a regulating valve (16) for regulating the air volume.

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