JP6116284B2 - Wind power generator wind power generator - Google Patents

Description

  The present invention relates to a wind power generator of an ecological wind power generator using natural energy.

  In the proposed wind power generator (wind power generator), the present invention receives natural wind efficiently and uses the received wind (wind) to rotate an impeller (wind turbine); Countermeasures for strong winds are an important issue, and by clearing this problem, the effectiveness of this type of wind power generator is established. Therefore, in the present invention, “I” natural wind is efficiently captured by the omnidirectional wind tunnel and sent to the windmill, efficient power generation, “B” at the converging part of the wind tunnel, and Adopting a flywheel method (a paired windmill method that moves in relation to each other) that captures at the top of the roof slope, “C” Controls the strong wind with a diffuser and makes it possible to adjust the air volume, It is intended to avoid noise, scattering, etc., and “d” to install a windmill in the annular windmill room to avoid noise generation, prevent inconvenience to the neighborhood at night, and eliminate environmental destruction.

  Although there is no document specifically showing the wind tunnel structure and the combination structure of the wind tunnel and the wind turbine intended by the present invention, the prior document considered to be a related ecological wind power generator is considered.

  Document (1) is Japanese Patent Application Laid-Open No. 2003-129951, in which a crossflow type fan (horizontal type horizontal axis windmill) is installed in the direction of a rooftop, takes in a large amount of natural wind, and rises on an inclined roof. It is intended to generate power efficiently. The present invention has a structure in which a crossflow type fan is simply installed on the roof, and it is considered that a special effect cannot be expected. It is also impractical and considered to be a lack of countermeasures during strong winds.

  Document (2) is Japanese Patent Application Laid-Open No. 2005-207288 in which a plurality of cross-flow fans are provided at the end of a single-flow roof (eave edge in the rooftop direction) and in the direction of the ridge. It intends to accumulate wind, collect wind effects, and achieve efficient power generation. However, the present invention has the same problem as in the document (1).

  Reference (3) is Japanese Patent Application Laid-Open No. 2002-257029, in which a wind collecting duct and a cross-flow type fan are installed in the direction of the roof (ridgeline) to take in a large amount of natural wind and wind on an inclined roof. It is intended to use the flow of air to focus wind and to generate power efficiently. However, the present invention simply has a structure in which a crossflow type fan or the like is installed on the roof. Moreover, this invention has the same problem as literature (1).

  Reference (4) is disclosed in Japanese Patent Application Laid-Open No. 11-107907, in which a tubular body that generates warm convection or ascending airflow is provided, a fan is installed in the tubular body, and the generator is generated through the rotation of the fan. It is the structure which drives and generates electricity. However, according to the present invention, the fan is rotated by warm convection flowing through the tubular body or by an ascending airflow, and the amount of power generation is very small.

JP 2003-129941 A JP-A-2005-207288 Japanese Patent Laid-Open No. 2002-257029 JP-A-11-107907

  As described above, in the literature (1) to the literature (4), the reception of the natural wind is not reliable and efficient, and the expansion of the power generation amount is not expected. In particular, it is considered that the impeller is not a structure adapted to the flow direction of natural wind, and the amount of wind is naturally reduced.

  Therefore, the present invention achieves the intentions (effects) of “i” to “d” that could not be achieved in the documents (1) to (4).

  For this purpose, the present invention proposes the following claims 1 to 9. This proposal is shown below.

Claim 1 includes a wind tunnel formed in the space of the building frame and the roof, an impeller chamber formed in a converging portion of the wind tunnel, an impeller fixed to the impeller chamber, and the impeller with a and interlocking the rotary shaft generator, and the該風Do, by opening in all directions of the roof, regardless of the wind direction, introducing air into該風cylinder, achievable constant power generation amount In the wind power generator
The impeller is provided on a rotating shaft provided in a direction orthogonal to the main shaft on a housing-shaped main shaft pivotally supported in the impeller chamber, and includes a pair of blades provided at both ends of the rotating shaft. And the impeller rotates about the main shaft in the impeller chamber, and the pair of blades rotate in the impeller chamber .

Claim 2 is the wind power generator according to claim 1,
The wind tunnel is a first unit of chevron shape provided on the precursor of the building, constituted by a second unit which is fitted to the first unit, an impeller chamber formed by the first and second units The wind power generator according to claim 1, wherein the impeller is arranged.

Claim 3 is the wind power generator according to claim 1,
The wind turbine according to claim 1, wherein the wind tunnel is configured to have a combined structure of a receiving passage and an exhaust passage.

Claim 4 is the wind power generator according to claim 1,
2. The wind power generator according to claim 1, wherein the exhaust passage provided in the wind tunnel is configured to be connected to a chimney that is erected toward the space.

Claim 5 is the wind power generator according to claim 1,
2. The wind power generator according to claim 1, wherein the wind tunnel has a structure in which rain receiving means is provided in each of a receiving passage and an exhaust passage.

Claim 6 is the wind power generator according to claim 2 ,
The wind turbine generator according to claim 2 , wherein the first and second units and the impeller are made of resin.

Claim 7 is the wind power generator according to claim 1,
2. The wind power generator according to claim 1, wherein a diffuser, a shutter, and a collision plate are provided in an opening direction of the wind tunnel so that the wind and rain amount can be adjusted.

The invention of claim 1 includes a wind tunnel formed in skeleton and space the roof of a building, an impeller chamber which is formed in yield歛部the wind tunnel, and impeller sealed shaft to the impeller chamber, rotation of the impeller comprising a power generator in tandem on the shaft, and a wind tunnel, by opening in all directions of the roof, regardless of the wind direction, introducing air into wind tunnel, wind power generator to be achieved a certain amount of power generation In
The impeller includes a pair of blades provided at both ends of the rotating shaft, and is provided on a rotating shaft provided in a direction orthogonal to the main shaft on a housing-shaped main shaft that is pivotally supported in the impeller chamber. In the impeller chamber, a pair of blades is a wind power generator that rotates around the main shaft and rotates in the impeller chamber .

Therefore, in claim 1, the following effects are obtained.
“I” Efficient power generation can be achieved by capturing natural wind efficiently with a wind tunnel that opens in all directions and sending it to the impeller (windmill).
“B” It is possible to adopt a flywheel system (a pair of windmill systems that move in relation to each other) that is captured at the converging part of the wind tunnel and at the top of the roof slope.
“C” Strong winds can be controlled with a diffuser, shutter, etc., and the air volume can be adjusted to avoid damage to equipment, noise and scattering.
By deploying an impeller that can turn and rotate in the "D" impeller chamber , noise generation can be avoided, inconvenience to the neighborhood at night, and environmental destruction can be eliminated.

Claim 2 is the wind power generator according to claim 1,
The wind tunnel is composed of a mountain-shaped first unit provided in the building housing and a second unit fitted into the first unit, and the impeller is formed in the impeller chamber formed by the first and second units. The wind power generator according to claim 1, which is configured to be deployed.

Therefore, the second aspect of the present invention has the following effects in addition to the “i” to “d”.
“E” It is possible to provide a wind tunnel structure that can achieve the above-mentioned “a” to “d”.

The invention of claim 3 is the wind power generator according to claim 1,
The wind tunnel is a wind power generator according to claim 1, wherein the wind tunnel is configured to have a combined structure of a receiving passage and an exhaust passage.

Therefore, the third aspect of the present invention has the following effects in addition to the “i” to “d”.
“F” It is possible to provide a wind tunnel mechanism that can achieve the objectives “A” to “D”.

The invention of claim 4 is the wind power generator according to claim 1,
2. The wind power generator according to claim 1, wherein the exhaust passage provided in the wind tunnel is configured to be connected to a chimney that is erected toward the space.

Accordingly, the fourth aspect of the present invention has the following effects in addition to the “i” to “d”.
“G” It is possible to provide a wind tunnel exhaust passage structure that can achieve the above-mentioned objectives “a” to “d”.

The invention of claim 5 is the wind power generator according to claim 1,
The wind tunnel is a wind power generator according to claim 1, wherein the wind tunnel has a structure in which rain receiving means is provided in each of the receiving passage and the exhaust passage.

Accordingly, the fifth aspect of the present invention has the following effects in addition to the “i” to “d”.
“Chi” It is possible to provide a wind tunnel rain closing structure that can achieve the above-mentioned “I” to “D” objectives.

Claim 6 is the wind power generator according to claim 2 ,
The wind turbine generator according to claim 2 , wherein the first and second units and the impeller are made of resin.

Therefore, the sixth aspect of the present invention has the following effects in addition to the “i” to “d”.
“Le” An impeller material capable of achieving the above-mentioned “I” to “D” can be provided.

Claim 7 is the wind power generator according to claim 1,
The wind power generator according to claim 1, wherein a diffuser, a shutter, and a collision plate are provided in an opening direction of the wind tunnel so that a wind amount can be adjusted.

Accordingly, the seventh aspect has the following effects in addition to the “i” to “d”.
“Wo” It is effective for adjusting the wind and rain amount to the wind tunnel (suction port), protecting the device during heavy winds, and eliminating noise.

The basic structure of the wind power generator of the present invention attached to a building, schematically showing the main part thereof The schematic diagram which showed the 1st Example and decomposed | disassembled and showed an example of the windmill structure of a pair An enlarged schematic diagram showing a configuration in which a diffuser, a shutter, and a collision plate are provided in the opening direction of the wind tunnel around the building (opening and inside), and the amount of wind and rain can be adjusted, and an exploded view of the diffuser Side view of Fig. 1-1 Ii end view of FIG. Ha ha end view of Fig. 2-2 Roll end view of Fig. 2-2 The knee end view of Fig. 2-3 Hoe end view of Fig. 2-3 Front schematic diagram of impeller 2-5 end view of Fig. 2-5 Side view of impeller Tote end view of Fig. 2-6 A schematic plan view showing the flow in the windless state and the rotation of the impeller with respect to the wind tunnel of the first embodiment. A schematic plan view showing the flow in the 45 ° direction and the turning of the impeller with respect to the wind tunnel of the first embodiment. A schematic plan view showing the flow in the direction of 60 ° and the rotation of the impeller with respect to the wind tunnel of the first embodiment. Side schematic diagram of the second embodiment Fig. 4-1. 4-2 End view of the tree in Fig. 4-2 FIG. 4B is an end view showing an example in which a wind passage is formed in the wind tunnel in the second embodiment of FIG. Nu-1 (2) -nu-1 (2) end view of Fig. 4-2 Fig. 4-3 Nu-1-nu-1 end view End view of Nu-2-nu-2 in Fig. 4-3 Front schematic diagram of impeller Rule end view of Fig. 4-5 Side schematic diagram of the third embodiment The end view of FIG. Side view of the fourth embodiment Wafer end view of Fig. 6-1 Side view of the fifth embodiment Schematic showing the wind receiving side of Fig. 7-1 7-1 End view of the main part of FIG. Schematic diagram of a building (roof, wall, etc.) with doorways for repairing and replacing wind power generators The figure explaining the objective of this invention, the flow of a structure, and its characteristics When using a diffuser, a shutter, and a collision plate provided in the opening direction, and a configuration that allows adjustment of the amount of wind and rain in the suction opening, the combination and the features that make this combination easy to understand

  The basic structure and the first embodiment shown in FIGS. 1-1 to 3-3 will be described. FIG. 1-1 is a basic structure and includes important elements of the present invention. That is, a control device is installed for receiving wind B to the wind tunnel described later. That is, a diffuser 1 is provided, and this diffuser 1 is a combination of a horizontal fin 1-1 in the horizontal direction and a vertical fin 1-2 in the straight direction, and this horizontal fin 1-1 and / or The wind is controlled by controlling the vertical fin 1-2 (separator). Specifically, air volume control during strong winds is intended to damage the device and avoid noise. The horizontal fins 1-1 and / or the vertical fins 1-2 use a combination of a wind sensor, human power, automatic control, or the like (not shown), or use independent control. Although schematically shown in FIG. 1-2, the horizontal fin 1-1 and / or the vertical fin 1-2 has a one-way inclination or a special inclination (the center of the opening 200) at the opening 200 of the wind tunnel 2. It is preferable to have an inclination / inclination directionality corresponding to each wind and rain such as vertical and inclined toward the both ends. In the figure, 3 indicates wrinkles. Also, as shown in FIG. 1-2, a space A3 is formed between the building A1 and the roof A2 of the building A, and a mountain-shaped first unit X and a mountain-shaped second unit Y are installed in the space A3. Then, the first and second units X and Y are installed between the casing A1 and the roof A2 using a joining means. Further, between the first and second units Y, the wind tunnel 2 that opens in all directions (the entire opening area of the open end) and the annular impeller chamber 5 are formed. The wind power generator is installed using the space A3 formed between the housing A1 and the roof A2 of the building A (the roof structure, direction, etc. are not limited). In addition, it is beneficial for improving the rain. In addition, a control device is laid for the incoming wind B to the wind tunnel 2, especially the incoming rain (water). For example, the shutter 1a or the collision plate 1b is the optimum direction, and one or several shutters 1a are provided in the vertical direction of the wind tunnel and / or the ridge direction, and various shapes (round holes) are provided in the shutter 1a. , Square holes, slits, etc.) are formed to control rainwater and wind. Further, one or several stages of collision plates 1b are provided on the inclined bottom surface of the wind tunnel. Using this collision plate 1b, rainwater and wind are controlled. Further, there may be a structure in which the inclination angle θ of the collision plate 1b is varied and the flexibility and / or the curvature is changed.

  In addition, as shown in FIG. 1-2, when the mass of the wind introduced from the opening 200 of the wind tunnel 2 is examined, the following formulas are established at the a position and the b position, and a constant air volume (power generation amount) is obtained. Is possible.

Q = S b (area), V b (wind speed), P b (pressure), hail (density) =
S (area), V (wind speed), P (pressure), and (density)
The first unit X includes a first groove 100 for forming a wind tunnel 2 that opens in all directions. The first groove 100 has a wide open end 100a and a converging part 100b (slightly at the apex). The lower position is a narrow structure, and the flow velocity is increased. Moreover, the lower part recessed part 100c (1st recessed part) of the impeller chamber 5 (shroud) which consists of a spherical shape or cyclic | annular form etc. is formed in the center part of the convergence part 100b. In addition, an inverted chevron-shaped second unit Y is installed in the first unit X. The second unit Y has a second groove 300 for forming the wind tunnel 2 that opens in all directions. The second groove 300 has a wide open end portion 300a and a converging portion 300b (slightly at the apex). The lower position is a narrow structure, and the flow velocity is increased. Moreover, the upper side recessed part 300c (2nd recessed part) of the annular impeller chamber 5 is formed in the center part of the convergent part 300b. For the open ends 100a and 300a, for example, means such as a curved surface shape and a passage hole are adopted in order to avoid wind and rain collision avoidance, sound generation avoidance, and the like. For example, FIG. 3-1 to FIG. 3-3 and FIG. 4-2-2 are shown.

  There is no resistance of the receiving wind B of the first unit X and / or no resistance of the receiving wind B of the second unit Y and the first groove 100 having a structure (hereinafter the same) that generates less sound. And / or the 2nd groove | channel 300 provided with the structure with little generation | occurrence | production of sound (henceforth the same) joins, for example, the mountain-shaped wind tunnel 2 shown to FIGS. 2-2 is formed. This wind tunnel 2 has a structure in which the eaves direction 2a of the roof A2 is wide and the ridge direction 2b is narrow, and the wind flow is smooth, loses resistance, or avoids noise generation, A curved wall is used, and the curved wall faces each other.

  The impeller chamber 5 includes a main shaft 6 having a vertically formed housing shape shown in FIG. 1-2, a cylindrical body orthogonal to the main shaft 6 and supported by the housing, and the cylindrical body. A pair of impellers 8 and 8 is rotatably mounted using a rotary shaft 7 having a bearing provided on the rotary shaft 7. Therefore, the receiving wind B taken into (accepted to) the wind tunnel 2 flows into (flows into) the impeller chamber 5 to rotate the impeller 8. In the figure, 800 indicates a blade. For example, the blade 800 has a small diameter on the outer side and a large diameter in the central direction (the direction of the main shaft 6) so as to match the spherical shape of the impeller chamber 5. That is, the pair of impellers 8 has a generally oval shape (see FIG. 2-5).

  In addition, the housing A1, the first and second units X and Y, and the roof A2 (these are collectively referred to as component members) are intended to be constructed integrally, and the respective components provided on the component members It attaches to the attachment hole 10 with one touch using a connecting tool or an insertion tool (not shown).

  In the figure, reference numeral 12 denotes a generator, and an input shaft 1200 of the generator 12 is suspended by a connecting means 700 such as a belt, a chain, a pulley, and a gear for hanging on the rotation shaft 7. The rotation of the rotary shaft 7 is transmitted to the generator 12 to generate power. Although not shown, a clutch mechanism is provided on the rotary shaft 7 to avoid the impeller 8 slipping as a failure avoidance during a strong wind.

  The flow of wind, the wind tunnel 2, and the rotation and turning of the impeller 8 according to the first embodiment will be described with reference to FIGS. FIG. 3A is a schematic plan view showing the flow in the windless state and the turning of the impeller 8, and the impeller 8 faces the X direction with respect to the ridge A2-2 of the roof A2 (0 °). While it is in a stopped state, there is a light wind on the roof A2, and the receiving wind B flows in this X direction. This receiving wind B is shown by a straight line. 3-2 is directed to the ridge A2-2 of the roof A2 in the 45 ° Y direction (turned in the Y direction) and receives the Y-direction received air B2 in the wind tunnel 2. As a result, the impeller 8 is in a state of turning in the Y direction (22.5 °). This receiving wind B is indicated by a 45 ° oblique line. The incoming wind B is guided to the impeller chamber 5 to generate electricity and generate electricity. The use of electricity can be considered as an example of direct use or an example of storing electricity in means such as a storage battery. Moreover, FIG. 3-3 is directed to the ridge A2-2 of the roof A2 in the Z direction of 60 ° (in a state of turning in the Z direction), and receives the received wind B in the Z direction into the wind tunnel 2. As a result, the impeller 8 is in a state of turning in the Y direction (45 °). This receiving wind B is indicated by a 45 ° oblique line. The incoming wind B is guided to the impeller chamber 5 to generate electricity and generate electricity. Others are the same as the above example.

  A second embodiment shown in FIGS. 4-1 to 4-5 will be described. Since the basic structure conforms to the first embodiment, the different structure will be described. In this second embodiment, the impeller 8 has a standard shape of a water wheel, and has a structure parallel to the casing A4 when the impeller 8 is provided in the impeller chamber 5. The generator 12 is directly connected to the rotating shaft 7 of the impeller 8. In FIG. 4-2-1, the first unit X is appropriately provided with a notch portion X 1 that allows the passage of wind, and the incoming wind B is reliably and promptly guided to the impeller 8. . Although not shown, there may be a structure in which the second unit Y is appropriately provided with a notch (not shown) that allows passage of wind.

  A third embodiment shown in FIGS. 5-1 to 5-2 will be described. Since the basic structure conforms to the first embodiment, the different structure will be described. In the third embodiment, an axial fan (impeller 8) is installed in the impeller chamber 5. The structure in which the impeller 8 is provided conforms to the second embodiment.

  A fourth embodiment shown in FIGS. 6-1 to 6-2 will be described. Since the basic structure conforms to the first embodiment, the different structure will be described. In the fourth embodiment, an axial fan (impeller 8) is installed in the impeller chamber 5. The structure in which the impeller 8 is provided substantially conforms to the first embodiment. In the figure, reference numeral 13 denotes a guard.

  The fifth embodiment shown in FIGS. 7-1 to 7-3 will be described. Since the basic structure conforms to the first embodiment, the different structure will be described. In the fifth embodiment, as shown in FIG. 7A, the wind receiving plate 20 provided on one side sliding in the impeller chamber 5 which has a cylindrical shape when viewed from the side, and the wind receiving plate 20 are opposed to each other. In addition, the impeller 8 (which is an impeller having a flywheel structure) provided on the other side in the impeller chamber 5, the wind receiving plate 20, the crank 21 connecting the impeller 8, and the impeller A generator 12 is provided on the rotating shaft 7 of the vehicle 8. Therefore, the wind receiving plate 20 receives the wind from the wind tunnel 2 (by the receiving wind B), the wind receiving plate 20 moves backward as indicated by an arrow (moves from one side to the other side), and the crank 21 is It swings and the impeller 8 is rotated by this swing. The rotation of the impeller 8 is transmitted to the generator 12 through the rotating shaft 7. Electricity is generated by the rotation of the generator 12.

  And although not shown in the figure, as a measure against no wind, by employing a structure that generates artificial wind using the temperature difference and guides it into the wind tunnel 2, it is possible to generate power at any time, ensuring continuity, In addition, stable power supply and a storage effect can be expected. The generation of this temperature difference employs a physical method, a chemical method, a heater / cold air method, or the like.

  FIG. 8 shows an open / close door A4 provided in the building A (such as the frame A1 “wall” roof A2), and repairs of the wind turbine generator, for example, the impeller 5, the impeller 8, or the support rod 7, the connecting means 700, and the like. Open and close the doorway for replacement.

  FIG. 9 is an explanatory view showing the object of the present invention, the flow of the structure, and the characteristics thereof. The suction opening (wind tunnel 2) is formed by the hole 1a1, the shutter 1a, and the collision plate 1b of the diffuser 1 provided in the opening direction. Is a diagram explaining the combination and the characteristics of the combination in an easy-to-understand manner when using a configuration that allows adjustment of the amount of wind and rain. Control of the elements such as the movement of the horizontal and vertical fins 1-1, 1-2 of the diffuser 1, the form of the hole 1a1 of the shutter 1a, and the change of the angle θ of the collision plate 1b, etc. Achieve power generation optimization, stabilization, and efficiency. In addition, we will ensure stability and a sense of security in our lives, while avoiding power generation equipment failures and improving durability. The illustration of the form of the hole 1a1, the angle θ, etc. is an example, and each combination in each column (vertical axis and / or horizontal axis) is an example and is not limited. Also, set optimal conditions. Since this explanation is explained in the table, details are omitted. It is clear that the above-described combinations and the characteristics of each combination can be achieved and beneficial by implementing and laying the present invention, or contribute widely to human development. .

  FIG. 10 shows the achievement of the object of the present invention and the necessary elements (structure and concept), which can be achieved by providing the wind power generator / wind generator described above. Moreover, the description is fully disclosed.

  Each structure described above is a description of a preferred example of the present invention. Therefore, the present invention is not limited to the above-described embodiments, and structures that change a part of the configuration within the scope of the invention, structures that can achieve the same features and effects, and the like are within the scope of the present invention. It is.

A building A1 housing A2 roof A2-2 building A3 space A4 open / close door B receiving wind X first unit Y second unit 1 diffuser 1-1 horizontal fin 1-2 vertical fin 1a shutter 1a1 hole 1b collision plate θ tilt angle 100 first One groove 100a Open end portion 100b Converging portion 100c Lower concave portion 200 Opening 300 Second groove 300a Open end portion 300b Converging portion 300c Upper concave portion 2 Wind tunnel 2a Eaves direction 2b Building direction 3 樋 5 Impeller chamber 6 Main shaft 7 Rotating shaft 700 Connecting means 8 Impeller 12 Generator 1200 Input shaft 20 Wind receiving plate 21 Crank

Claims (7)

A wind tunnel that is formed on the skeleton and space the roof of a building, an impeller chamber which is formed in yield歛部the wind tunnel, and impeller seals axis the impeller chamber, and interlocking to the axis of rotation of the impeller comprising a generator, and the該風Do, by opening all direction of the roof, regardless of the wind direction, introducing air into該風cylinder, in a wind power generator that enables achieve a constant power generation amount ,
The impeller is provided on a rotating shaft provided in a direction orthogonal to the main shaft on a housing-shaped main shaft pivotally supported in the impeller chamber, and includes a pair of blades provided at both ends of the rotating shaft. And the impeller rotates about the main shaft in the impeller chamber, and the pair of blades rotate in the impeller chamber . The wind power generator according to claim 1,
The wind tunnel is a first unit of chevron shape provided on the precursor of the building, constituted by a second unit which is fitted to the first unit, an impeller chamber formed by the first and second units The wind power generator according to claim 1, wherein the impeller is arranged. The wind power generator according to claim 1,
The wind turbine according to claim 1, wherein the wind tunnel is configured to have a combination structure of a receiving passage and an exhaust passage. The wind power generator according to claim 1,
The wind power generator according to claim 1, wherein the exhaust passage provided in the wind tunnel is configured to be connected to a chimney that is erected toward the space. The wind power generator according to claim 1,
The wind turbine according to claim 1, wherein the wind tunnel has a structure in which rain receiving means is provided in each of a receiving passage and an exhaust passage. The wind power generator according to claim 2 ,
The wind power generator according to claim 2 , wherein the first and second units and the impeller are made of resin. The wind power generator according to claim 1,
The wind power generator according to claim 1, wherein a diffuser, a shutter, and a collision plate are provided in an opening direction of the wind tunnel so that the wind and rain amount can be adjusted.