Energy harvesting device

Abstract

An energy harvesting device is provided, one embodiment of which includes a housing, a blade, and a power generation unit, which may include a power generation motor and a piezoelectric power generation portion. In an energy harvesting device according to one embodiment, electrical energy can be generated using rotation of a slip flow generated during driving of a motor vehicle through a blade. Pressure and impacts generated during rotation of the blades can additionally generate electrical energy. When the blade rotates at a high speed as the driving speed of the motor vehicle increases, it is possible to reduce pressure and impact, thereby preventing damage to the blade or the piezoelectric element, and thus improving durability thereof.

Description

Technical Field

[0001] The invention relates to an energy harvesting device for a motor vehicle. Background Art

[0002] There are many ways to produce the energy needed to drive vehicles such as trains, cars and ships, and research into new energy sources such as hydrogen, solar and wind energy is ongoing.

[0003] This new energy is a typical environmentally friendly energy suitable for transportation, and research is being actively conducted to apply it to hydrogen-powered vehicles and electric vehicles equipped with batteries with improved functions. However, vehicles using hydrogen energy have the disadvantage that they must be refilled and are costly.

[0004] On the other hand, systems using wind or solar energy do not require recharging and are easy to manage. In particular, with the depletion of fossil energy resources and the acceleration of environmental pollution caused by fossil energy, wind and solar energy are attracting attention as new renewable alternative energy and environmentally friendly energy.

[0005] Various transportation vehicles such as trains, cars, ships and airplanes generate slipstreams around them when they are in operation, and can be equipped with wind power generation equipment that uses the slipstreams.

[0006] Generally, a wind power generation device generates electric energy by performing a power generation operation of a motor using the rotation of a fan. However, it is difficult to generate a sufficient amount of electric energy using a wind power generation device. In addition, when a large number of fans are installed therein, the volume of the wind power generation device may be too large.

[0007] In addition, the wind power generation equipment can generate electric energy by rotating the fan using a slipstream. The wind power generation equipment can be configured so that the rotation speed of the fan increases as the driving speed of the motor vehicle increases. However, conventional wind power generation equipment does not provide a structure or method for preventing the fan from being damaged due to its high-speed rotation.

[0008] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms known relevant art. Summary of the invention

[0009] The present invention relates to an energy harvesting device which uses a slipstream induced during travel of a motor vehicle to generate electrical energy.

[0010] An embodiment of the present invention has been made in view of the above problems. One embodiment of the present invention can provide an energy collection device that generates electric energy using a slipstream caused during the running of a motor vehicle and maximizes the efficiency of generating electric energy using the slipstream.

[0011] According to one embodiment of the present invention, the above and other advantages can be achieved by providing an energy collection device, which includes: a shell, which is divided into a flow space for air flow and a power generation space for power generation, and a rotating shaft that passes through the flow space and the power generation space is arranged in the shell; blades are arranged in the flow space to be connected to the rotating shaft, and the blades are configured to rotate due to air flow; and a power generation unit is arranged in the power generation space, the power generation unit includes a pressure generating part and a power generation part, the pressure generating part is connected to the rotating shaft and is configured to rotate together with the rotating shaft, and the power generation part is fixed to the power generation space, and the power generation part is configured to generate electrical energy when the pressure generating part rotates and hits the power generation part.

[0012] In the housing, the flow space and the power generation space may be located in a straight line. The flow space may include an inlet and an outlet for air flow, and the power generation space may be configured to be isolated from the outside.

[0013] The housing may further include a generator motor connected to the rotating shaft, and the generator motor may be configured to convert the rotational power of the rotating shaft into electrical energy.

[0014] The pressure generating portion may include a guide member and a striking member. The guide member may be coupled to the rotating shaft and configured to be rotatable together with the rotating shaft. The striking member may be movably provided on the guide member and may have a striking protrusion.

[0015] The inner circumferential surface of the striking member and the outer circumferential surface of the guide member may be configured to be partially angled and configured to match each other.

[0016] The striking protrusion of the striking member may be provided in plurality, and the plurality of striking protrusions may be configured to be spaced apart from each other in a length direction and a rotation direction.

[0017] The power generation space of the housing may be divided into a first space and a second space. The power generation unit may be located in the first space, the guide member may be configured to extend from the first space to the second space, and the impact member may be configured to move along the guide member by centrifugal force according to the rotation speed of the rotating shaft, so that the contact position between the impact protrusion and the power generation unit changes.

[0018] The impact member may further include a weight and an elastic body. The weight may be located on the impact member and configured to rotate together with the impact member and may be spaced apart from the impact protrusion. The elastic body may be disposed in the second space to elastically support the impact member toward the first space.

[0019] The guide member may include a plurality of steps on an outer circumferential surface thereof, and the striking member may include a locking protrusion on an inner circumferential surface thereof and configured to be selectively caught by one of the plurality of steps.

[0020] The plurality of impact protrusions may be provided, and the plurality of impact protrusions may be located on the outer peripheral surface of the impact member. The spacing distance between the plurality of impact protrusions may be equal to the spacing distance between the plurality of steps.

[0021] The housing may be provided in plurality, the rotating shaft may extend through the plurality of housings, and the blades and the power generation unit may share the rotating shaft to generate electric energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0023] Figure 1 is a top view showing a motor vehicle to which an energy collection device according to an embodiment of the present invention is applied;

[0024] Figure 2 is a perspective view showing an energy collection device according to one embodiment of the present invention;

[0025] Figure 3 It is shown Figure 2 A partial perspective view of the energy harvesting device shown in ;

[0026] Figure 4 yes Figure 2 An exploded view of the energy harvesting device shown in;

[0027] Figure 5 is a cross-sectional view showing an initial position of an energy harvesting device according to one embodiment of the present invention;

[0028] Figure 6 is a perspective view showing an initial position of an energy harvesting device according to one embodiment of the present invention;

[0029] Figure 7 is a cross-sectional view showing a state in which a large amount of slipstream is introduced into an energy collection device according to one embodiment of the present invention;

[0030] Figure 8 is a perspective view showing a state in which a large amount of slipstream is introduced into an energy collection device according to one embodiment of the present invention;

[0031] Fig. 9 is a perspective view showing an energy collection device according to an embodiment of the present invention; and

[0032] Fig.10 It is shown Fig. 9 A cross-sectional view of the internal structure of the energy harvesting device is shown. DETAILED DESCRIPTION

[0033] The embodiments of the present specification will be described in detail with reference to the accompanying drawings, and the same or similar elements may be denoted by the same reference numerals even though they may be shown in different drawings and their redundant description may be omitted.

[0034] Regarding constituent elements, the suffixes "module" and "section" are used to simplify the description and do not necessarily have meanings or functions distinguished from each other.

[0035] In the following description of the embodiments of this specification, when the known functions and structures incorporated herein may make the embodiment subject matter disclosed in this specification unclear, the detailed description thereof may be omitted. In addition, the accompanying drawings are provided to better understand the embodiments of this specification, and are not intended to limit the technical ideas disclosed in this specification. Therefore, it is understood that the embodiments may include all modifications, equivalents and alternatives within the scope and spirit of the present invention.

[0036] It will be understood that although the terms "first", "second", etc. may be used herein to describe various components, these components are not necessarily limited by these terms. These terms may be used to distinguish one component from another.

[0037] It will be understood that when a component is referred to as being "connected to" or "coupled to" another component, it may be directly connected to, coupled to, or coupled to the other component, or intervening components may be present. On the other hand, when a component is referred to as being "directly connected to" or "directly coupled to" another component, there are no intervening components.

[0038] As used herein, singular forms may also include plural forms unless the context clearly indicates otherwise.

[0039] It can be further understood that the terms "includes", "comprising", "having" and / or "having" when used in this document specify the presence of stated features, numbers, steps, operations, elements, parts or a combination thereof, but do not exclude the presence or combination of one or more other features, numbers, steps, operations, elements, parts or a combination thereof.

[0040] An energy harvesting device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0041] like Figures 1 to 4 As shown, an energy collection device according to an embodiment of the present invention includes a shell 100, blades 200 and a power generation unit 300, the shell 100 is divided into a flow space 110 in which air flows and a power generation space 120 for generating electricity, and a rotating shaft 130 is provided therein so as to pass through the flow space 110 and the power generation space 120, the blades 200 are provided in the flow space 110, connected to the rotating shaft 130 and configured to rotate by air flow, the power generation unit 300 is provided in the power generation space 120, and includes: a pressure generating part 310 connected to the rotating shaft 130 and configured to rotate together with the rotating shaft 130; and a power generation part 320, the power generation part 320 is fixed to the power generation space 120, and is configured to generate electrical energy when the pressure generating part 310 rotates and hits the power generation part 320.

[0042] The housing 100 may be further provided with a generator motor 400 to which the rotating shaft 130 is connected. The generator motor 400 can convert the rotational power of the rotating shaft 130 into electrical energy.

[0043] The energy collection device of the present invention may be a device that generates electrical energy using a slipstream caused during the driving process of a motor vehicle. The energy collection device of the present invention may be located at a position in a motor vehicle where a slipstream may be introduced, such as the front side or roof of the motor vehicle.

[0044] For example, Figure 1 As shown, the housing 100 can be located at the front side of the motor vehicle. In order to avoid interference with other components of the motor vehicle, the housing 100 can be arranged in pairs, and the pair of housings 100 can be located on both sides of the front bumper of the motor vehicle.

[0045] The inner space in the housing 100 may be divided into a flow space 110 and a power generation space 120. The housing 100 may include a housing 100a defining the flow space 110 internally and a cover 100b coupled to the housing 100a and defining the power generation space 120 internally.

[0046] The rotating shaft 130 may penetrate the flow space 110 and the power generation space 120 in the housing 100 , and the blades 200 and the power generation unit 300 may be connected to the rotating shaft 130 .

[0047] In the housing 100 , the flow space 110 , the power generation space 120 , and the power generation motor 400 may be located in a straight line so that a single rotation shaft 130 may be connected to the blades 200 , the power generation unit 300 , and the power generation motor 400 .

[0048] The flow space 110 may be provided with an inlet and an outlet for air circulation. During the travel of the motor vehicle, the slipstream may enter the flow space 110 through the inlet, and may flow out of the flow space 110 through the outlet after rotating the blades 200. The housing 100 may be configured such that the inlet of the flow space 110 is oriented in the traveling direction of the motor vehicle, and the outlet of the flow space 110 is oriented in the direction opposite to the traveling direction of the motor vehicle.

[0049] The power generation space 120 may be configured to be isolated from the outside to prevent the power generation unit 300 disposed therein from being polluted from the outside.

[0050] The blade 200 may be located in the flow space 110 of the housing 100, the power generation unit 300 may be located in the power generation space 120 of the housing 100, and the generator motor 400 may be installed outside the housing 100. Accordingly, the blade 200, the power generation unit 300, and the generator motor 400 may be connected to each other via a single rotating shaft 130, and are configured to be interlocked with each other.

[0051] In addition, because the blades 200, the power generation unit 300 and the generator motor 400 are positioned on a straight line along the rotating shaft 130, and the rotating shaft 130 rotates by rotating the blades 200 through air flow, the generator motor 400 generates electrical energy using the rotational force, and the power generation unit 300 operates in a manner linked to the rotation of the rotating shaft 130 and generates electrical energy in a piezoelectric manner.

[0052] As described above, the power generation unit 300 includes the pressure generating part 310 and the power generation part 320. The pressure generating part 310 is coupled to the rotating shaft 130 and is configured to rotate together with the rotating shaft 130. The power generation part 320 generates electric energy by being struck by the pressure generating part 310 rotating in a state fixed in the power generation space 120. The pressure generating part 310 may include an striking structure, and the power generation part 320 may be configured as a piezoelectric element.

[0053] Piezoelectric energy harvesting using a piezoelectric element converts mechanical energy such as vibration, pressure, or impact into electrical energy. When the pressure generating part 310 rotates together with the rotating shaft 130 and hits the power generating part 320, the power generating part 320 can generate electrical energy.

[0054] In this manner, according to the present invention, when the blades 200 provided to the housing 100 rotate due to the slip flow, the generator motor 400 and the power generation unit 300 connected to the rotating shaft 130 both generate electric energy, thereby being able to improve the efficiency of generating electric energy.

[0055] The pressure generating part 310 includes a guide member 311 and an impact member 312. The guide member 311 may be coupled to the rotating shaft 130 and configured to rotate together with the rotating shaft 130, and the impact member 312 may be movably provided to the guide member 311 and may include an impact protrusion 312a.

[0056] like Figure 5 As shown, the power generation unit 300 includes a pressure generating portion 310 and a power generation portion 320 .

[0057] The power generation unit 320 may be configured as a piezoelectric element, and a plurality of the power generation units 320 may be provided in the power generation space 120 of the housing 100 .

[0058] The pressure generating part 310 includes a guide member 311 and a striking member 312. The guide member 311 is connected to the rotating shaft 130 and is configured to rotate together with the rotating shaft 130, and the striking member 312 is connected to the guide member 311 and is configured to rotate together with the guide member 311.

[0059] For this purpose, the rotating shaft 130 and the guide member 311 may be coupled to each other. Alternatively, the outer circumferential surface of the rotating shaft 130 and the inner circumferential surface of the guide member 311 contacting each other may be configured to be partially angled (inclined), whereby the rotating shaft 130 and the guide member 311 may rotate together.

[0060] The striking member 312 needs to move in the length direction of the guide member 311 while rotating together with the guide member 311. The inner circumference of the striking member 312 and the outer circumference of the guide member 311 may be configured to be partially angled so that the striking member 312 moves along the guide member 311 while rotating together with the guide member 311.

[0061] Accordingly, when the pressure generating portion 310 rotates at a high speed together with the rotating shaft 130 , the striking member 312 moves along the guide member 311 and is configured to be separated from the power generating portion 320 , thereby preventing damage to the power generating portion 320 .

[0062] In detail, the striking member 312 may include a plurality of striking protrusions 312 a , and the striking protrusions 312 a may be configured to be spaced apart from each other in the length direction and the rotation direction.

[0063] That is, the impact protrusions 312a are spaced apart from each other in the longitudinal direction of the impact member 312 and are also spaced apart from each other in the rotation direction of the impact member 312 without overlapping each other, thereby increasing the number of impacts on the power generation unit 320 caused by the rotation of the impact member 312.

[0064] For example, the number of the impact protrusions 312a may be four. The four impact protrusions 312a may be spaced apart from each other at a prescribed interval in the length direction of the impact member 312, and may be spaced apart from each other by 90 degrees in the rotation direction of the impact member 312. The number of the impact protrusions 312a may be determined according to the amount of electric energy generated by the power generation unit 320 and the durability of the power generation unit 320.

[0065] In addition, since the striking member 312 may be movably provided to the guide member 311 , the number of striking protrusions 312 a contacting the power generation part 320 may be changed according to the position where the striking member 312 moves along the guide member 311 .

[0066] like Figure 5 As shown, the power generation space 120 in the housing 100 may be divided into a first space 121 and a second space 122, the power generation portion 320 may be located in the first space 121, and the guide member 311 may be configured to extend through the first space 121 and the second space 122. The impact member 312 may move along the guide member 311 by centrifugal force according to the rotation speed of the rotating shaft 130, so that the contact position between the impact protrusion 312a and the power generation portion 320 may be changed.

[0067] like Figure 5 As shown, the power generation space 120 in the housing 100 may include a first space 121 and a second space 122 , the power generation part 320 is located in the first space 121 , and the second space 122 is another space for accommodating the impact member 312 separated from the power generation part 320 .

[0068] The guide member 311 may be coupled to the rotation shaft 130 and configured to extend through the first space 121 and the second space 122 , whereby the striking member 312 may move from the first space 121 to the second space 122 along the guide member 311 , and vice versa.

[0069] When the impact member 312 is located in the first space 121 of the power generation space 120 in the housing 100, the impact member 312 can contact and impact the power generation part 320, so that the power generation part 320 generates electric energy. When the impact member 312 moves to the second space 122 of the power generation space 120 in the housing 100, the impact member 312 can be separated from the power generation part 320, or the number of contact points between the impact member 312 and the power generation part 320 can be reduced.

[0070] In particular, the striking member 312 may move along the guide member 311 by centrifugal force according to the rotation speed of the rotation shaft 130 .

[0071] The rotating shaft 130 may rotate together with the blade 200 according to the amount of air flowing in the flow space 110 in the housing 100. As the travel speed of the motor vehicle increases, the rotation amount of the blade 200 may increase, and the rotation speed of the rotating shaft 130 may also increase.

[0072] If the impact member 312 rotating at high speed together with the rotating shaft 130 continuously or repeatedly impacts the power generation portion 320, external stress applied to the power generation portion 320 may increase and may cause damage to the power generation portion 320 (i.e., deterioration in durability of the power generation portion 320).

[0073] As the rotation speed of the rotating shaft 130 increases, the impact member 312 can gradually move along the guide member 311 in a direction away from the power generation part 320 due to centrifugal force, thereby reducing the number of contact points between the impact protrusion 312a of the impact member 312 and the power generation part 320, thereby avoiding damage to the power generation part 320.

[0074] The striking member 312 may further include a weight body 313 and an elastic body 314 .

[0075] The weight body 313 may be made of metal or rubber, may be provided at the striking member 312, and may be configured to rotate together with the striking member 312. In addition, the weight body 313 may be spaced apart from the striking protrusion 312a of the striking member 312, and may be provided at a portion of the striking member 312 located in the second space 122.

[0076] The elastic body 314 may be located in the second space 122 to elastically support the impact member 312 or to apply force to the impact member 312 toward the first space 121. The elastic body 314 may be configured as a spring, and may be connected to the counterweight body 313 or the impact member 312 in a bearing structure or may be in contact with the counterweight body 313 or the impact member 312. Accordingly, the elastic body 314 may allow the impact member 312 to rotate relative thereto while elastically supporting or biasing the impact member 312.

[0077] Accordingly, as the rotation speed of the rotation shaft 130 connected to the pressure generating part 310 increases, the weight body 313 provided at the striking member 312 may move from the first space 121 to the second space 122 by centrifugal force.

[0078] When the impact member 312 is located at the initial position, all the impact protrusions 312a can contact the power generation part 320, and as the impact member 312 moves toward the second space 122 in proportion to the increase in the rotation speed, the number of the impact protrusions 312a contacting the generator can gradually decrease. On the other hand, as the rotation speed of the impact member 312 decreases, the impact member 312 can return from the second space 122 to the first space 121 by the elastic supporting force of the elastic body 314.

[0079] Furthermore, the guide member 311 may include a plurality of curved protrusions or steps 311 a formed on an outer circumferential surface thereof, and the striking member 312 may include a locking protrusion 312 b formed on an inner circumferential surface thereof and configured to be selectively caught by one of the steps 311 a .

[0080] As the movement position of the striking member 312 along the guide member 311 changes, the position where the locking protrusion 312 b is caught by one of the step portions 311 a may change.

[0081] Due to the step portion 311 a formed on the guide member 311 , the movement position of the striking member 312 can be fixed in stages.

[0082] The spacing distance between the plurality of impact protrusions 312 a formed on the outer circumferential surface of the impact member 312 may be equal to or correspond to the spacing distance between the step portions 311 a .

[0083] Accordingly, depending on the position where the locking protrusion 312 b of the striking member 312 is caught or restricted by the step portion 311 a of the guide member 311 , the position of each striking protrusion 312 a contacting the power generation part 320 may be adjusted in stages.

[0084] For example, Figures 5 to 9 As shown, four impact protrusions 312a can be formed on the outer circumferential surface of the impact member 312, three step portions 311a can be formed on the guide member 311, and the locking protrusion 312b of the impact member 312 can be configured to be caught or restricted by one of the step portions 311a of the guide member 311.

[0085] like Figure 5 and 6 As shown, when the impact member 312 is located at the initial position, all the impact protrusions 312a of the impact member 312 can be positioned and configured to contact the power generation part 320. Therefore, when the rotating shaft 130 rotates, all the impact protrusions 312a can alternately impact the power generation part 320, thereby maximizing or increasing the amount of electric energy generated by the power generation part 320.

[0086] When the amount of air flowing in the flow space 110 of the housing 100 increases, and thus the rotation speed of the blade 200 and the rotating shaft 130 increases, the impact member 312 can move along the guide member 311, and accordingly, the position where the locking protrusion 312b is stuck or restricted by one of the step portions 311a can change.

[0087] Since the locking protrusions 312 b of the striking member 312 are sequentially caught or restricted by the step portions 311 a of the guide member 311 , the striking member 312 may be moved stepwise, so the number of contact points between the striking protrusion 312 a and the power generating part 320 may be adjusted in stages.

[0088] As the rotation speed of the rotation shaft 130 increases, the impact member 312 may move along the guide member 311. When the rotation speed of the rotation shaft 130 exceeds a set, selected or predetermined level, such as Figure 7 and 8 As shown, the striking member 312 may move in a direction away from the power generation portion 320 , and as a result, only one striking protrusion 312 a may contact the power generation portion 320 .

[0089] External stress applied to the power generation part 320 due to contact with the impact member 312 can be adjusted according to the rotation speed of the rotation shaft 130. Accordingly, fatigue life of the power generation part 320 can be improved, and thus durability of the pressure generation part 310 and the power generation part 320 can be improved.

[0090] According to one embodiment of the present invention, Fig. 9 and 10 As shown, the housing 100 may be provided in plurality, the rotation shaft 130 may extend to penetrate the plurality of housings 100 , and the blades 200 and the power generation unit 300 may share the rotation shaft 130 to generate electrical energy.

[0091] Since the housing 100 is provided in plurality, the blade 200 may be provided in plurality and the plurality of blades 200 may be respectively located in the plurality of housings 100. In addition, since the single rotating shaft 130 penetrates the plurality of housings 100, the plurality of blades 200 and the power generation unit 300 may be connected to each other via the single rotating shaft 130.

[0092] Accordingly, the amount of air flowing into the flow space 110 of the housing 100 can be increased, and thus it is possible to ensure the amount of rotation of the blade 200. In addition, since these components are connected to each other via the single rotation shaft 130, the structure of the device can be simplified.

[0093] The housing 100 may be located at a mounting position of an active damper on the front side of a motor vehicle to selectively generate electricity.

[0094] As is apparent from the above description, according to one embodiment of the energy collection device constructed as described above, electric energy can be generated by rotating the blades by the slipstream generated during the travel of the motor vehicle. In addition, the pressure and impact generated during the rotation of the blades can additionally generate electric energy. Accordingly, the amount of electric energy generated can be increased.

[0095] Furthermore, when the blades rotate at a high speed as the running speed of the motor vehicle increases, pressure and impact can be reduced, thereby preventing damage to the blades or the piezoelectric element and thus improving the durability thereof.

[0096] Although the embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention.

Claims

1. An energy collection device, comprising: a housing, the housing being divided into a flow space for air to flow in and a power generation space for power generation, wherein a rotating shaft penetrating the flow space and the power generation space is provided in the housing; a blade connected to the rotating shaft in the flow space, the blade being configured to rotate due to the flow of air; and The power generation unit in the power generation space includes a pressure generating part and a power generation part, the pressure generating part is connected to the rotating shaft and is configured to rotate together with the rotating shaft, the power generation part is fixed to the power generation space, and the power generation part is configured to generate electrical energy when the pressure generating part rotates and hits the power generation part.

2. The energy harvesting device according to claim 1, wherein: In the housing, the flow space and the power generation space are located in a straight line, The flow space includes an inlet and an outlet for air flow, and The power generation space is configured to be isolated from the outside.

3. The energy harvesting device according to claim 1, wherein: The housing further includes a generator motor to which the rotating shaft is connected, and the generator motor is configured to convert the rotational power of the rotating shaft into electrical energy.

4. The energy harvesting device according to claim 1, wherein: The pressure generating portion includes a guide member and a striking member, The guide member is connected to the rotating shaft so as to be rotatable together with the rotating shaft, and The striking member is movably provided on the guide member and has a striking protrusion.

5. The energy collection device according to claim 4, wherein: The inner peripheral surface of the striking member and the outer peripheral surface of the guide member are configured to partially form an angle and to engage with each other.

6. The energy collection device according to claim 4, wherein: The striking protrusion of the striking member is provided in plurality, and the plurality of striking protrusions are configured to be spaced apart from each other in a length direction and a rotation direction.

7. The energy harvesting device according to claim 4, wherein: The power generation space of the housing is divided into a first space and a second space, The power generation unit is located in the first space, The guide member is configured to extend from the first space to the second space, and The striking member is configured to move along the guide member by centrifugal force according to a rotation speed of the rotating shaft so that a contact position between the striking protrusion and the power generating portion changes.

8. The energy harvesting device according to claim 7, wherein: The impact component further includes a weight body and an elastic body. The weight body is located on the striking member and is configured to rotate together with the striking member and to be spaced apart from the striking protrusion. The elastic body is located in the second space, and is configured to bias the striking member toward the first space by utilizing elasticity.

9. The energy collection device according to claim 4, wherein: The guide member includes a plurality of steps on its outer circumference, and The striking member includes a locking protrusion located on an inner circumferential surface thereof and configured to be selectively caught by one of the plurality of steps.

10. The energy harvesting device according to claim 9, wherein: The striking protrusion is provided in plurality, and the plurality of striking protrusions are located on the outer peripheral surface of the striking member, and A first spacing distance between the plurality of impact protrusions is equal to a second spacing distance between the plurality of steps.

11. The energy harvesting device according to claim 1, wherein: The housing is provided with a plurality of The rotating shaft extends through the plurality of housings, and The blades and the power generating unit share the rotating shaft.

12. An energy collection device comprising: a housing, wherein the housing is divided into a flow space and a power generation space; a rotating shaft located in the housing and extending to the flow space and the power generation space; a blade connected to the rotation shaft in the flow space, the blade being configured to rotate due to the flow of air in the flow space, and the rotation shaft being configured to rotate in accordance with the rotation of the blade; as well as The power generation unit in the power generation space, the power generation space of the housing is divided into a first space and a second space, and the power generation unit includes: a generator motor connected to the rotating shaft, the generator motor being configured to convert the power of the rotating shaft into electrical energy, a piezoelectric power generating unit, the piezoelectric power generating unit being located in the first space and having a piezoelectric element, and A pressure generating part, the pressure generating part includes a guide member and an impact member, the impact member is movably connected to the guide member, the impact member has an impact protrusion extending from it, the guide member is connected to the rotating shaft and is configured to rotate using the rotating shaft, the guide member extends to the first space and the second space, the impact member is configured to move between the first space and the second space relative to the guide member, so that when the impact member is located in the first space, more of the impact protrusions are aligned with the piezoelectric power generation part than when the impact member moves to the second space, and the impact protrusion is configured to impact the piezoelectric power generation part so that the piezoelectric element of the piezoelectric power generation part converts impact energy into electrical energy.

13. The energy harvesting device according to claim 12, wherein: The pressure generating portion includes a spring located in the second space, and the spring is configured to bias the striking member toward the first space.

14. The energy harvesting device according to claim 13, wherein: The striking member is configured to move along the guide member by centrifugal force according to a rotation speed of the rotating shaft, so that the spring is compressed as the rotation speed of the rotating shaft increases and a contact position between the striking protrusion and the piezoelectric power generating section changes.

15. The energy harvesting device according to claim 14, wherein: The pressure generating portion further includes a weight body connected to the striking member and configured to rotate together with the striking member, wherein the weight body is spaced apart from the striking protrusion.

16. The energy harvesting device according to claim 15, wherein: The guide member includes a plurality of steps on its outer circumference, and The striking member includes a locking protrusion located on an inner circumferential surface thereof and configured to be selectively caught by one of the plurality of steps of the guide member.

17. The energy harvesting device according to claim 16, wherein: The first spacing distance between the impact protrusions is equal to the second spacing distance between the plurality of steps.

18. A method for operating an energy collection device, the energy collection device comprising a housing, the housing being divided into a flow space and a power generation space, and having a rotating shaft penetrating the flow space and the power generation space, the energy collection device further comprising a blade connected to the rotating shaft in the flow space, and a power generation unit located in the power generation space, the power generation unit comprising a pressure generating portion connected to the rotating shaft and a power generation portion fixed to the power generation space, the method for operating the energy collection device comprising: Allowing air to flow into the flow space, so that the blades rotate due to the flow of the air; as well as The pressure generating portion rotates and strikes the power generating portion to generate electric energy.

19. The method of operating an energy harvesting device according to claim 18, further comprising: The rotational power of the rotating shaft is converted into electrical energy.

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