Wind turbines, wind power generation equipment, and buildings

Abstract

The present invention provides a wind turbine, a wind power generation device, and a building that can suitably perform wind power generation using wind from multiple directions. [Solution] A wind turbine 100 that rotates around a rotation axis, comprising: a savonius section 130 that rotates in the direction of wind turbine rotation with respect to wind force in a direction perpendicular to the axial direction of the rotation axis; and a propeller section 140 provided on at least one of the axial directions of the savonius section 130 and the other side, and that rotates in the direction of wind turbine rotation with respect to wind force in the axial direction.

Description

Technical Field

[0001] The present invention relates to wind turbines, wind power generation devices, and buildings.

Background Art

[0002] Conventionally, technologies related to wind power generation using wind turbines are known. For example, it is as described in Patent Document 1.

[0003] Patent Document 1 describes a wind power generation device installed in a building such as a high-rise building. The wind power generation device described in Patent Document 1 includes a rotating blade rotatably supported around an axis whose axial direction is in the horizontal direction, and generates electricity by rotating the rotating blade. The body that supports the rotating blade is supported by a rotating table that can rotate around an axis whose axial direction is in the vertical direction. Thereby, the wind power generation device can change the horizontal direction of the rotating blade according to the direction of the wind. According to the wind power generation device, power generation using the building wind blowing in the horizontal direction can be performed.

[0004] Here, it is desired to install a wind power generation device not only in high-rise buildings but also, for example, in houses. When applying a wind power generation device to a house, it is assumed that the wind power generation device is installed in a place such as a roof or an outer wall that is easily affected by wind. However, since the portion where the roof of the house is formed has a relatively complex shape, the direction of the wind hitting the roof or the like changes moment by moment, and the wind may blow upward or downward. Therefore, a technology that can preferably perform wind power generation using winds in a plurality of directions including not only the horizontal direction but also the vertical direction is desired.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] This invention has been made in view of the above circumstances, and the problem it aims to solve is to provide a wind turbine, a wind power generation device, and a building that can suitably perform wind power generation using wind from multiple directions. [Means for solving the problem]

[0007] The problems that this invention aims to solve are as described above, and the means for solving these problems will now be explained.

[0008] That is, claim 1 provides a wind turbine that rotates around a rotating shaft, comprising: a first part that rotates in a predetermined direction by wind force in a direction perpendicular to the axial direction of the rotating shaft; and a second part provided on at least one of the one side and the other side of the first part in the axial direction, which rotates in the predetermined direction by wind force in the axial direction.

[0009] In claim 2, the second portion is provided on one side and the other side of the first portion in the axial direction, respectively.

[0010] In claim 3, the first part comprises a Savonius blade section constituting a Savonius wind turbine, and the second part comprises a propeller blade section constituting a propeller wind turbine.

[0011] Claim 4 provides a fixing portion which is positioned between the first portion and the second portion and to which the first portion and the second portion are each fixed, and the fixing portion has an opening which connects a space partitioned by the Savonius blade portion and the fixing portion and a space partitioned by the propeller blade portion and the fixing portion.

[0012] In claim 5, the first portion, the second portion on one side in the axial direction, and the second portion on the other side in the axial direction are all the same in dimensions in the axial direction, and the portion of the first portion, the second portion on one side in the axial direction, and the second portion on the other side in the axial direction that constitutes the outer shell of the wind turbine is formed by a curve that follows a hypothetical sphere.

[0013] Claim 6 comprises a wind turbine as described in any one of claims 1 to 5, and a power generation unit that generates electricity using the rotational force of the wind turbine.

[0014] Claim 7 is a building having a roof and an exterior wall, wherein the wind power generation device described in Claim 6 is installed on at least one of the roof and the exterior wall. [Effects of the Invention]

[0015] The present invention provides the following effects:

[0016] In this invention, wind power generation using wind from multiple directions can be suitably performed. [Brief explanation of the drawing]

[0017] [Figure 1] A schematic front view showing a wind power generation device according to one embodiment of the present invention. [Figure 2] (a) A schematic front view showing a house with a wind turbine installed. (b) A schematic side view showing a house with a wind turbine installed. [Figure 3] A schematic perspective view showing a house equipped with a wind turbine. [Figure 4] A perspective view showing a wind turbine from the front. [Figure 5] A perspective view showing a wind turbine seen from above. [Figure 6] A perspective view showing the shaft and the fixing part. [Modes for carrying out the invention]

[0018] Hereinafter, the windmill 100, the wind power generation device 10, and the building 1 according to an embodiment of the present invention will be described. The drawings from FIG. 1 to FIG. 3 are schematic views, and for convenience of explanation, the dimensions and shapes of each part are exaggerated as appropriate.

[0019] First, the building 1 will be described. In this embodiment, the building 1 is assumed to be a two - to three - story house (a single - family house). The building 1 includes a roof 2 and an outer wall 3. As shown in FIGS. 2(a) and 3, the roof 2 has portions (eaves) that project on both the left - and right - hand sides in the lateral direction with respect to the outer wall 3. Note that the building 1 is not limited to a single - family house, and for example, a low - rise apartment building can also be adopted.

[0020] Next, the wind power generation device 10 will be described. The wind power generation device 10 generates electricity using wind power. The wind power generation device 10 is installed in the building 1. The electric power generated by the wind power generation device 10 can be used in the building 1. The wind power generation device 10 can be connected to, for example, a power storage device installed in the building 1.

[0021] In FIGS. 1 and 2, an example in which the wind power generation device 10 is installed on the soffit (the underside of the eaves) at the front - and rear - end portions in the lateral direction of the roof 2 of the building 1 is shown. As shown in FIGS. 2(b) and 3, a plurality of wind power generation devices 10 are provided along the front - and rear - direction and installed at the eaves. The wind power generation device 10 includes a windmill 100 and a power generation unit 200.

[0022] The windmill 100 shown in FIGS. 1 and FIGS. 4 to 6 rotates by wind power. As shown in FIG. 1, the windmill 100 is formed to rotate around a rotation axis whose axis is oriented in the vertical direction. The windmill 100 according to this embodiment is formed to rotate counterclockwise in a plan view. Hereinafter, the rotation direction of the windmill 100 will be referred to as the "windmill rotation direction". A detailed description of the configuration of the windmill 100 will be described later.

[0023] The power generation unit 200 shown in Figure 1 generates electricity by the rotation of a wind turbine 100. The power generation unit 200 is attached to the building 1 (the underside of the roof 2 in the example shown in Figure 1). The power generation unit 200 has a shaft 210 to which the wind turbine 100 is attached, and which is rotatable around a rotation axis with its axis oriented vertically. The power generation unit 200 generates electricity as the shaft 210 rotates. A suitable motor can be used for the power generation unit 200. In the example shown, the power generation unit 200 is shown to be directly attached to the roof 2, but it is also possible to attach the power generation unit 200 to the roof 2 via a predetermined jig. It is also possible to cover the power generation unit 200 with a predetermined case (cover).

[0024] The details of the wind turbine 100's configuration will be explained below using Figures 4 to 6. The wind turbine 100 is formed in a roughly circular shape when viewed from the front. The wind turbine 100 comprises a shaft section 110, a fixed section 120, a savonius section 130, and a propeller section 140.

[0025] The shaft portion 110 constitutes the rotation axis of the wind turbine 100. The shaft portion 110 is positioned so that its axial direction is vertical. As shown in Figure 6, the shaft portion 110 is formed in a roughly cylindrical shape that is elongated vertically. The end of the shaft portion 110 (the upper end in the example shown in Figure 1) is fixed to the shaft 210 of the power generation unit 200.

[0026] The fixing portion 120 is used to fix the savonius portion 130 and the propeller portion 140, which will be described later, to the shaft portion 110. The fixing portion 120 is formed in a substantially plate shape with the plate surface direction oriented vertically. The fixing portion 120 is also formed in a substantially circular shape when viewed from above.

[0027] As shown in Figure 6, two fixing parts 120 are provided, spaced apart in the vertical direction. Each fixing part 120 is fixed to the shaft part 110 in the vertical direction. Hereafter, the upper fixing part 120 will be referred to as "upper fixing part 120A" and the lower fixing part 120 as "lower fixing part 120B" as needed. The fixing part 120 comprises a shaft fixing part 121, an outer circumference part 122, and a connecting part 123.

[0028] The shaft fixing portion 121 is the part that is fixed to the shaft portion 110. The shaft fixing portion 121 constitutes the radially central part of the fixing portion 120 in a plan view (hereinafter simply referred to as "the radial direction of the fixing portion 120"). The shaft fixing portion 121 is formed in a substantially annular shape in a plan view. A hole is formed in the substantially central part of the shaft fixing portion 121 in a plan view through which the shaft portion 110 is inserted. The shaft fixing portion 121 is fixed to the shaft portion 110 with the shaft portion 110 inserted through the hole.

[0029] The outer periphery 122 constitutes the radially outer portion of the fixing portion 120. The outer periphery 122 is formed in a substantially annular shape in plan view and is positioned radially outward from the shaft fixing portion 121.

[0030] The connecting portion 123 is the part that connects the outer peripheral portion 122 and the shaft fixing portion 121. The connecting portion 123 is formed to extend along the radial direction of the fixing portion 120. Multiple connecting portions 123 (three in this embodiment) are provided at regular intervals in the circumferential direction of the fixing portion 120 in a plan view (hereinafter simply referred to as the "circumferential direction of the fixing portion 120"). In this embodiment, each connecting portion 123 is formed such that the phase difference between adjacent connecting portions 123 in the circumferential direction is approximately 120°.

[0031] As described above, the fixing portion 120 has an opening 124 which is the remaining portion after removing the shaft fixing portion 121, the outer peripheral portion 122, and the connecting portion 123. The opening 124 is formed to open in the vertical direction in the fixing portion 120. In this embodiment, the opening 124 is formed in a substantially fan shape in plan view. In this embodiment, three openings 124 are provided along the circumferential direction of the fixing portion 120, flanking the connecting portion 123.

[0032] The Savonius section 130 shown in Figures 4 and 5 rotates in the horizontal direction (a direction perpendicular to the axial direction of the shaft section 110). The Savonius section 130 constitutes a Savonius-type wind turbine. The Savonius section 130 is positioned between the upper fixing section 120A and the lower fixing section 120B.

[0033] The Savonius section 130 is equipped with a plurality (three in this embodiment) of blade sections 131. The blade sections 131 are formed to rotate in the direction of the wind turbine rotation around the rotation axis when subjected to a horizontally blowing wind.

[0034] As shown in Figures 4 and 5, the blade portion 131 is formed to extend from the shaft portion 110 toward the outer circumference 122 of the fixing portion 120, along the radial direction of the fixing portion 120. The blade portion 131 is formed in the shape of a curved plate-shaped member. The blade portion 131 is also arranged so that its plate surface generally faces the direction of rotation of the wind turbine. In the illustrated example, the blade portion 131 is curved so that the surface of the blade portion 131 facing the upstream side (clockwise direction in plan view) in the direction of rotation of the wind turbine is concave in plan view.

[0035] Each blade portion 131 is provided at a constant interval in the circumferential direction of the fixing portion 120. In this embodiment, each blade portion 131 is positioned to correspond to the connection portion 123 of the fixing portion 120 (overlapping with the connection portion 123 when viewed in the vertical direction). The vertical ends of each blade portion 131 are fixed to the upper fixing portion 120A and the lower fixing portion 120B, respectively. In addition, the end of the blade portion 131 on the center side (the end on the radial center side of the fixing portion 120) is fixed to the shaft portion 110.

[0036] As described above, the Savonius section 130 has a Savonius space S formed within it, which is a space partitioned by the wing section 131 and the upper and lower fixing sections 120 (see Figure 4).

[0037] The propeller section 140 shown in Figures 4 and 5 rotates due to wind force in the vertical direction (axis direction of the shaft section 110). The propeller section 140 constitutes a propeller-type wind turbine. The propeller section 140 is provided on the upper surface of the upper fixed section 120A and the lower surface of the lower fixed section 120B, respectively. In the following description, the upper propeller section 140 will be referred to as "upper propeller section 140A" and the lower propeller section 140 as "lower propeller section 140B" as needed. The upper propeller section 140A and the lower propeller section 140B are formed in shapes that are inverted vertically from each other. In the following description, we will focus on the upper propeller section 140A and explain the configuration of the propeller section 140.

[0038] The upper propeller section 140A is equipped with multiple (three in this embodiment) blade sections 141. The blade sections 141 are formed to rotate in the direction of the wind turbine rotation around the rotation axis when subjected to wind blowing from above.

[0039] As shown in Figure 5, the blade portion 141 is formed to extend from the shaft portion 110 toward the outer circumference 122 of the upper fixing portion 120A. The blade portion 141 is formed in a substantially semicircular shape in plan view. The blade portion 141 is also formed in a shape in which a plate-shaped member with its plate surface facing generally in the vertical direction is bent so as to incline upward as it moves downstream in the direction of wind turbine rotation. More specifically, the upstream half of the blade portion 141 in the direction of wind turbine rotation is provided so as to follow the upper surface of the upper fixing portion 120A, and the downstream half in the direction of wind turbine rotation is formed to incline upward.

[0040] Each blade portion 141 is provided at a constant interval in the circumferential direction of the upper fixing portion 120A. In this embodiment, each blade portion 141 is positioned to correspond to the opening 124 of the upper fixing portion 120A (overlapping with the opening 124 when viewed in the vertical direction). The lower surface of the blade portion 141 on the upstream side in the wind turbine rotation direction is fixed to the upper surface of the upper fixing portion 120A so as to cover a part of the opening 124. Of the portion of the blade portion 141 on the downstream side in the wind turbine rotation direction, the portion on the central side of the upper propeller portion 140A (the portion on the radial center side) is fixed to the shaft portion 110.

[0041] The lower propeller section 140B is designed to rotate in the direction of the wind turbine's rotation around its axis of rotation when subjected to wind blowing from below. The lower propeller section 140B is provided on the lower surface of the lower fixed section 120B. The shape of the lower propeller section 140B is the same as the upper propeller section 140A but inverted vertically. Therefore, a description of the shape of the lower propeller section 140B is omitted.

[0042] As described above, the propeller section 140 has a propeller space P formed in which the space is partitioned by the downstream side of the blade section 141 in the direction of wind turbine rotation (the part inclined with respect to the fixed section 120) and the fixed section 120 (see Figure 4).

[0043] In this embodiment, the wind turbine 100 has the above-described parts (shaft part 110, fixing part 120, savonius part 130, upper propeller part 140A, and lower propeller part 140B) integrally fixed. When the wind turbine 100 is made of metal, the parts can be fixed by welding. It is also possible to fix the above parts by adhesive or the like.

[0044] In this embodiment, the wind turbine 100 is constructed such that the vertical dimensions of each part (Savonius section 130, upper propeller section 140A, and lower propeller section 140B) constituting the upper, middle, and lower sections of the wind turbine 100 are approximately the same as those of the lower section. The sum of the vertical dimensions of the Savonius section 130, upper propeller section 140A, and lower propeller section 140B is approximately the same as the outer diameter of the wind turbine 100 (fixed section 120) in a plan view.

[0045] Furthermore, the wind turbine 100 is formed so that its outer shell is roughly spherical. More specifically, the parts of the Savonius section 130, the upper propeller section 140A, and the lower propeller section 140B that constitute the outer shell of the wind turbine 100 are formed by curves that follow the curved surface of a hypothetical sphere (not shown). Here, "outer shell of the wind turbine 100" refers to the outer (opposite-center) end with respect to the center of the wind turbine 100 in the vertical direction and the radial direction of the plan view. The center of the above hypothetical sphere is at roughly the same position as the center of the wind turbine 100 in the vertical direction and the radial direction of the plan view.

[0046] The details of the wind turbine 100's configuration have been described above. The wind turbine 100 can rotate in the direction of wind rotation by receiving wind force from multiple directions (up and down and horizontal). Specifically, the wind turbine 100 can rotate in the direction of wind rotation by receiving wind blowing from the horizontal direction (front, back, left, and right) with the Savonius section 130. It can also rotate in the direction of wind rotation by receiving wind blowing from above with the upper propeller section 140A. Furthermore, it can rotate in the direction of wind rotation by receiving wind blowing from below with the lower propeller section 140B.

[0047] Furthermore, the wind turbine 100 has approximately the same upper and lower dimensions for the Savonius section 130, the upper propeller section 140A, and the lower propeller section 140B, and the overall shape is close to a sphere. This allows the wind turbine 100 to rotate in a balanced manner regardless of the wind direction. Also, this shape allows for efficient capture of wind, so the wind turbine 100 can rotate even with a weak breeze.

[0048] Furthermore, the wind turbine 100 can reduce wind resistance by forming an opening 124 in the fixed part 120. In other words, if the opening 124 were not formed in the fixed part 120, wind blowing horizontally would enter the propeller space P, creating resistance and potentially hindering the rotation of the wind turbine 100 (see Figure 4).

[0049] In the wind turbine 100 according to this embodiment, the propeller space P and the Savonius space S are connected by an opening 124 formed in the fixed part 120. As a result, the wind that enters the propeller space P can escape into the Savonius space S, thereby reducing wind resistance.

[0050] Furthermore, by using the wind turbine 100 described above, a wind power generation device 10 suitable for installation on a house can be formed. In other words, a wind power generation device 10 equipped with the wind turbine 100 can efficiently generate wind power using wind from multiple directions. This makes it suitable for wind power generation when installed on the eaves of a house or similar location where the wind direction changes easily and the wind is weaker than that of buildings.

[0051] Figures 2(b) and 3 show an example in which multiple wind turbines 10 are installed along the eaves of building 1. With this setup, the combined power generated by the multiple wind turbines 10 can be obtained to produce a substantial amount of electricity.

[0052] The installation location of the wind turbine 10 on building 1 is not limited to under the eaves. For example, as shown in Figure 3, it is also possible to install the wind turbine 10 on the exterior wall 3 of building 1. The example in the figure shows an example where the wind turbine 10 is installed on the corners (outside corners) of multiple exterior walls 3. Also, as shown in Figure 3, it is also possible to install the wind turbine 10 on the apex (ridge) of the roof 2 of building 1. In this case, the wind turbine 10 is installed in an inverted orientation compared to the example shown in Figure 1. Furthermore, the installation location of the wind turbine 10 is not limited to the examples described above, and various locations on building 1 can be used.

[0053] As described above, the wind turbine 100 according to one embodiment of the present invention is A wind turbine 100 that rotates around a rotation axis, The Savonius section 130 (first part) rotates in the wind turbine rotation direction (predetermined direction) by wind force in a direction perpendicular to the axial direction of the aforementioned rotation shaft (horizontal direction), A propeller section 140 (second part) is provided on at least one of the axial sides (upper side) and the other side (lower side) of the Savonius section 130, and rotates in the direction of rotation of the wind turbine by the wind force in the axial direction, It is equipped with the following features.

[0054] This configuration allows for the effective use of wind power generation using wind from multiple directions. Specifically, the wind turbine 100 rotates in the same direction both when subjected to horizontal wind and when subjected to wind force from at least one of the vertical directions. By using the wind turbine 100 configured in this way, wind power generation using wind from multiple directions can be effectively achieved.

[0055] Furthermore, the propeller section 140 (upper propeller section 140A and lower propeller section 140B) These are provided on one side (upper side) and the other side (lower side) of the savonius section 130 in the axial direction, respectively.

[0056] With this configuration, the wind turbine 100 can be rotated by wind coming from both sides in the axial direction (up and down direction).

[0057] Furthermore, the Savonius section 130 is It is equipped with a blade section 131 (Savonius blade section) that constitutes a Savonius wind turbine, The propeller section 140 is, It is equipped with a blade section 141 (propeller blade section) that constitutes a propeller-type wind turbine.

[0058] With this configuration, a Savonius-type wind turbine and a propeller-type wind turbine can be combined to form wind turbine 100.

[0059] Also, Windmill 100 is, The Savonius section 130 and the propeller section 140 are positioned between them and include a fixing section 120 to which the Savonius section 130 and the propeller section 140 are fixed. The aforementioned fixing portion 120 includes, An opening 124 is formed that connects the Savonius space S, which is partitioned by the blade portion 131 and the fixing portion 120, and the propeller space P, which is partitioned by the blade portion 141 and the fixing portion 120.

[0060] This configuration reduces wind resistance. Specifically, when horizontally blowing wind enters the propeller space P, the wind can escape into the Savonius space S through the opening 124. This reduces wind resistance.

[0061] Furthermore, the Savonius section 130, the upper propeller section 140A (the second portion on one side in the axial direction), and the lower propeller section 140B (the second portion on the other side in the axial direction) each have the same dimensions in the axial direction. Of the Savonius section 130, the upper propeller section 140A, and the lower propeller section 140B, the parts that constitute the outer casing of the wind turbine 100 are formed by curves that follow a hypothetical sphere.

[0062] This configuration allows the wind turbine 100 to rotate smoothly regardless of the wind direction.

[0063] Furthermore, the wind power generation device 10 according to one embodiment of the present invention is A wind turbine 100 according to one embodiment of the present invention, The power generation unit 200 generates electricity using the rotational force of the wind turbine 100, It is equipped with the following features.

[0064] This configuration allows for efficient wind power generation using wind from multiple directions.

[0065] Furthermore, Building 1 according to one embodiment of the present invention is A building 1 having a roof 2 and exterior walls 3, A wind power generation device 10 according to one embodiment of the present invention is installed on at least one of the roof 2 and the exterior wall 3.

[0066] This configuration allows for efficient wind power generation using wind from multiple directions.

[0067] Furthermore, the Savonius section 130 according to this embodiment is one embodiment of the first part of the present invention. Furthermore, the blade portion 131 according to this embodiment is one form of the Savonius blade portion according to the present invention. Furthermore, the propeller section 140 according to this embodiment is one embodiment of the second part according to the present invention. Furthermore, the blade portion 141 according to this embodiment is one form of the propeller blade portion according to the present invention.

[0068] Although embodiments of the present invention have been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention as described in the claims.

[0069] For example, the shape of the wind turbine 100 according to this embodiment is not limited to the example described above, and various shapes can be adopted from the viewpoint of suitably rotating the wind turbine 100 using wind from multiple directions. Specifically, in this embodiment, the wind turbine 100 is formed in a shape close to a sphere, but it is not limited to the example described above, and for example, the wind turbine 100 can be formed in a substantially elongated spherical shape that is long in the vertical or horizontal direction. It is also possible to form the wind turbine 100 in a substantially cylindrical shape.

[0070] Furthermore, in this embodiment, an example is shown in which the upper and lower dimensions of the Savonius section 130, the upper propeller section 140A, and the lower propeller section 140B of the wind turbine 100 are formed to be approximately the same as those of the other. However, the embodiment is not limited to the example described above. Various values ​​(ratios) can be adopted for each of the above dimensions from the viewpoint of suitably rotating the wind turbine 100 using wind from multiple directions.

[0071] In this embodiment, the number of blades 131 in the Savonius section 130 and the number of blades 141 in the propeller section 140 are set to three, but the example described above is not limited to this case. Various values ​​can be adopted for the number of blades in each section from the viewpoint of optimally rotating the wind turbine 100.

[0072] Furthermore, in this embodiment, an example is shown in which the upper propeller section 140A and the lower propeller section 140B are located on both sides of the Savonius section 130 in the vertical direction, but the invention is not limited to the example described above. For example, only one of the upper propeller section 140A and the lower propeller section 140B may be provided.

[0073] Furthermore, in this embodiment, an example was shown in which the first part of the wind turbine 100 is a Savonius-type wind turbine and the second part is a propeller-type wind turbine. However, the type of wind turbine for each part is not limited to the example described above, and various types can be adopted.

[0074] Furthermore, in this embodiment, an example is shown in which the axis of rotation of the wind turbine 100 is oriented in the vertical direction. However, the orientation of the axis of rotation is not limited to the example described above, and various directions can be adopted.

[0075] Furthermore, although this embodiment shows a residential building as an example of building 1, it is not limited to the example described above. Various types of buildings, such as office buildings, can be used as building 1. [Explanation of Symbols]

[0076] 1. Building 10 Wind power generation equipment 100 windmills 110 Shaft section 120 Fixed part 130 Savonius section 140 Propeller Section 200 Power Generation Unit

Claims

1. A wind turbine that rotates around a rotation axis, A first part that rotates in a predetermined direction by wind force in a direction perpendicular to the axial direction of the aforementioned rotating shaft, A second part is provided on at least one of the axial sides of the first part and rotates in the predetermined direction by the wind force in the axial direction, A windmill equipped with [a certain feature].

2. The aforementioned second part is, The first portion is provided on one side and the other side in the axial direction, respectively. The wind turbine according to claim 1.

3. The aforementioned first part is, It is equipped with Savonius blades, which make up a Savonius wind turbine. The aforementioned second part is, It is equipped with the propeller blades that make up a propeller-type wind turbine. The wind turbine according to claim 2.

4. It is provided with a fixing part that is positioned between the first part and the second part and to which the first part and the second part are each fixed, The aforementioned fixing part includes, An opening is formed that connects the space partitioned by the Savonius blade portion and the fixing portion with the space partitioned by the propeller blade portion and the fixing portion. The wind turbine according to claim 3.

5. The first portion, the second portion on one side in the axial direction, and the second portion on the other side in the axial direction each have the same dimension in the axial direction. Of the first part, the second part on one side in the axial direction, and the second part on the other side in the axial direction, the portion constituting the outer shell of the wind turbine is formed by a curve along a hypothetical sphere. The wind turbine according to claim 2.

6. A wind turbine according to any one of claims 1 to 5, A power generation unit that generates electricity using the rotational force of the wind turbine, A wind power generation device equipped with the following features.

7. A building having a roof and exterior walls, A building on which the wind power generation device described in claim 6 is installed on at least one of the roof and the exterior wall.

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