Energy harvesting device

Abstract

In an embodiment, an energy harvesting device includes a housing, a first power generation unit, and a second power generation unit. In an energy harvesting device according to an embodiment, electrical energy may be generated by rotating blades by an airflow generated during travel of a moving vehicle. Electric energy may be additionally generated by pressure and impact forces generated during rotation of the blades. When the blades rotate at a high speed as the driving speed of the moving vehicle increases, the pressure and impact force can be reduced, thereby avoiding damage to the blades or the piezoelectric element, thereby improving durability thereof.

Description

Technical Field

[0001] The present disclosure relates to an energy harvesting device for a mobile vehicle. Background Art

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

[0003] This type of new energy is a typical environmentally friendly energy suitable for transportation, and research is currently being actively conducted to apply this type of energy to hydrogen vehicles and electric vehicles equipped with batteries with improved functions. However, vehicles using hydrogen energy have the disadvantages of having to recharge and high costs.

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

[0005] Various vehicles such as trains, cars, ships, and airplanes cause slipstreams in the surroundings when operating, and may have wind power generation equipment using the slipstreams.

[0006] Generally, a wind power generation device generates electric energy by operating a motor to generate electricity using the rotation of a fan. However, it is difficult to generate sufficient electric energy using a wind power generation device. In addition, when a large number of fans are installed, the volume of the wind power generation device may increase unexpectedly.

[0007] In addition, wind power generation equipment can generate electricity by rotating a fan using airflow. The wind power generation equipment can be configured so that as the speed of the moving vehicle increases, the speed of the fan also increases. However, conventional wind power generation equipment does not have a structure or method to prevent the fan from being damaged due to high-speed rotation.

[0008] The information disclosed in this background technology section is only used to enhance the understanding of the general background context of the present disclosure and should not be regarded as an admission or any form of implication that this information constitutes the disclosed related art. Summary of the invention

[0009] The present disclosure relates to an energy harvesting device that uses slipstream induced during the travel of a moving vehicle to generate electrical energy.

[0010] The embodiments of the present disclosure are proposed in view of the above problems. The embodiments of the present disclosure can provide an energy collection device that generates electric energy using airflow caused during the travel of a moving vehicle and maximizes the efficiency of generating electric energy using the airflow.

[0011] According to an embodiment of the present disclosure, the above-mentioned advantages and other advantages can be achieved by providing an energy collection device, which includes: a shell, which includes: a flow channel formed in the shell and allowing air to flow through; a first power generation unit, which is installed to the shell, includes a rotating part and a power generation part, and is configured so that when the rotating part is rotated by air flowing through the flow channel, the power generation part uses the rotational force to generate electrical energy; and a second power generation unit, which is installed to the shell, configured to be contactable with the rotating part, and configured so that when the rotating part rotates, the power generation unit is struck by the rotating part to generate electrical energy.

[0012] The rotating part of the first power generation unit may include blades and a rotating shaft. The blades and the power generation unit may be connected to each other via the rotating shaft, and the second power generation unit may generate electric energy by contacting the blades.

[0013] The second power generation unit may include a piezoelectric plate and a support plate. The piezoelectric plate may be configured to be contactable with the blade, may be arranged to be movable in the flow channel, and may generate electrical energy by contacting the blade. The support plate may elastically support the piezoelectric plate.

[0014] The piezoelectric plate may be formed to extend in a rotation direction of the blade, and may include: a through hole formed in the piezoelectric plate so that air flows through the through hole and flows into the flow channel.

[0015] The blade may include an impact protrusion protruding from a surface of the blade facing the piezoelectric plate. The piezoelectric plate may include a first piezoelectric element disposed on a first surface of the piezoelectric plate facing the blade.

[0016] A plurality of first piezoelectric elements may be provided, and the plurality of first piezoelectric elements may be arranged to be spaced apart from each other in a rotation direction of the blade.

[0017] The first piezoelectric element may be formed to have an inclined surface whose height gradually increases in a rotation direction of the blade.

[0018] The piezoelectric plate may include a second piezoelectric element disposed on a second surface of the piezoelectric plate facing the support plate.

[0019] The support plate may include an elastic member disposed on a surface of the support plate facing the piezoelectric plate, and the elastic member may be configured to match the second piezoelectric element.

[0020] The support plate may include a guide pin formed on a surface of the support plate facing the piezoelectric plate. The guide pin may pass through the piezoelectric plate to guide movement of the piezoelectric plate, and the elastic member may be disposed around the guide pin and may be interposed between the piezoelectric plate and the support plate.

[0021] A plurality of second piezoelectric elements may be provided, and the plurality of second piezoelectric elements may be configured to be spaced apart from each other in a rotation direction of the blade. A plurality of elastic members may be provided to match the plurality of second piezoelectric elements.

[0022] The rotating part of the first power generation unit may include blades and a rotating shaft. The blades and the power generation unit may be connected to each other via the rotating shaft, and the second power generation unit may generate electric energy by contacting the blades.

[0023] The housing may be divided into a flow channel and a power generation space. The blades may be located in the flow channel, and the second power generation unit and the power generation part may be located in the power generation space.

[0024] The rotating shaft may extend through the flow channel and the power generation space and may be connected to the blades and the power generation part, and may include: an impact part extending radially from the rotating shaft in the power generation space. The second power generation unit may be located within a rotation radius of the impact part in the power generation space.

[0025] The impact part may include: a rounded distal end that may be configured to be contactable with the second power generation unit. The second power generation unit may include: a portion that faces the impact part when the impact part rotates, and the portion may be configured to be inclined.

[0026] The second power generation unit may be configured to generate electric energy by elastic deformation. A plurality of second power generation units may be provided, and the plurality of second power generation units may be located around the power generation portion and configured to be spaced apart from each other along the periphery of the power generation portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above features and other advantages of the present disclosure may be more clearly understood through the following detailed description in conjunction with the accompanying drawings, in which:

[0028] Figure 1 is a view showing a moving vehicle to which an energy harvesting device according to an embodiment of the present disclosure is applied;

[0029] Figure 2 is a view showing an energy collection device according to an embodiment of the present disclosure;

[0030] Figure 3 yes Figure 2 An exploded view of the energy harvesting device shown in;

[0031] Figure 4 It is shown Figure 2 A perspective view of a piezoelectric plate of the energy harvesting device shown in FIG.

[0032] Figure 5 It is shown Figure 2 A perspective view of a blade of the energy harvesting device shown in;

[0033] Figure 6 It is shown Figure 2 A cross-sectional view of a piezoelectric plate and a support plate of the energy harvesting device shown in ;

[0034] Figure 7 It is shown Figure 2A perspective view of a support plate of the energy harvesting device shown in;

[0035] Figure 8 is a perspective view showing an energy collection device according to an embodiment of the present disclosure;

[0036] Fig. 9 It is shown Figure 8 A cross-sectional view of the interior of the energy harvesting device shown in;

[0037] Fig.10 is a perspective view showing an energy collection device according to an embodiment of the present disclosure; and

[0038] Fig.11 It is shown Fig.10 A cross-sectional view of the interior of the energy harvesting device shown in FIG. DETAILED DESCRIPTION

[0039] Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, and even though they may be depicted in different drawings, the same or similar elements may be denoted by the same reference numerals and their redundant description may be omitted.

[0040] In the following description, for constituent elements used in the following description, suffixes “module” and “unit” may be used for description, but do not necessarily have meanings or functions distinguished from each other.

[0041] In the description of the following embodiments, when the detailed description of the known functions and configurations incorporated herein may make the subject matter of the embodiments unclear, the description may be omitted. In addition, the drawings are provided only for a better understanding of the embodiments disclosed in this specification, and are not necessarily intended to limit the technical ideas disclosed in this specification. Therefore, it is understood that the drawings include all modifications, equivalents, and substitutes within the scope and spirit of the present disclosure.

[0042] 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 are only used to distinguish one component from another.

[0043] It is understood that when a component is referred to as being "connected to" or "coupled to" another component, it may be directly connected to or coupled to the other component, or intermediate components may exist. On the other hand, when a component is referred to as being "directly connected to" or "directly coupled to" another component, there are no intermediate components.

[0044] As used herein, the singular forms may be intended to include the plural forms unless the context clearly indicates otherwise.

[0045] It will also be understood that the terms “comprises / comprising” and “includes / including” used herein indicate the presence of stated features, integers, steps, operations, elements, components or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components or combinations thereof.

[0046] With reference to the accompanying drawings, an energy harvesting device according to an embodiment of the present disclosure is described.

[0047] like Figures 1 to 3 As shown, the energy collection device according to an embodiment of the present disclosure includes: a shell 100, which includes a flow channel 110 formed therein to allow air to flow through; a first power generation unit 200, which is installed to the shell 100, includes a rotating part 210 and a power generation part 220, and is configured so that when the rotating part 210 is rotated by air flowing through the flow channel 110, the power generation part 220 generates electrical energy using the rotational force; and a second power generation unit 300, which is installed to the shell 100, is configured to be in contact with the rotating part 210, and is configured so that when the rotating part 210 rotates, electrical energy is generated by being hit by the rotating part 210.

[0048] The energy collection device according to an embodiment of the present disclosure may be a device that generates electrical energy using airflow caused during the travel of a moving vehicle. The energy collection device according to an embodiment of the present disclosure may be located at a location in a moving vehicle where airflow can be introduced, such as the front side or top of the moving vehicle.

[0049] For example, Figure 1 As shown, the energy collection device may be located at the front side of the moving vehicle. To avoid interference with other components of the moving vehicle, the energy collection device may be arranged in pairs, and the paired power generation units 200 may be located on both sides of the front bumper of the moving vehicle.

[0050] The inlet and the outlet of the housing 100 may communicate with each other through a flow channel 110 formed in the housing 100 , so that air may flow through the flow channel 110 .

[0051] The housing 100 may be provided with a first power generation unit 200 including a rotating part 210 and a power generation part 220. The rotating part 210 may be configured to rotate by air flowing through the flow channel 110, and the power generation part 220 may be configured to generate electric energy using the rotation force of the rotating part 210.

[0052] The rotating part 210 may include blades 211 configured to be rotated by the flow of air, and the power generation part 220 may be implemented as a generator motor.

[0053] In addition, the housing 100 may be further provided with a second power generation unit 300 configured to be in contact with the rotating portion 210. When the rotating portion 210 rotates, the second power generation unit 300 may be in contact with the rotating portion 210. When the rotating portion 210 rotates, the second power generation unit 300 may be struck by the rotating portion 210 and generate electric energy in a piezoelectric manner.

[0054] The second power generating unit 300 may include a piezoelectric element. Piezoelectric energy harvesting using a piezoelectric element may convert mechanical energy such as vibration, pressure, or impact into electrical energy.

[0055] According to an embodiment of the present disclosure including a first power generation unit 200 and a second power generation unit 300, when the rotating portion 210 of the first power generation unit 200 is rotated by the airflow, the power generation portion 220 can generate electric energy, and the rotating portion 210 can impact the second power generation unit 300, so that the second power generation unit 300 can generate electric energy in a piezoelectric manner, thereby improving the efficiency of generating electric energy.

[0056] Figures 2 to 8 An embodiment of the present disclosure is shown.

[0057] The rotating part 210 of the first power generation unit 200 may include blades 211 and a rotating shaft 212, and the blades 211 and the power generation unit 220 may be connected to each other via the rotating shaft 212. The second power generation unit 300 may generate electric energy by contact with the blades 211.

[0058] The rotating part 210 and the power generation part 220 may be disposed in the flow channel 110 in the housing 100, and the rotating shaft 212 may be connected to the blades 211 and the power generation part 220. Therefore, when the blades 211 rotate, the power generation part 220 may receive the rotational force and generate electric energy using the rotational force.

[0059] In addition, the second power generation unit 300 may be located in the flow channel 110 in the housing 100 and configured to be contactable with the blades 211. Therefore, when the blades 211 rotate and hit the second power generation unit 300, the second power generation unit 300 may generate electrical energy using mechanical energy such as vibration or impact.

[0060] The second power generating unit 300 may include a piezoelectric plate 310 and a support plate 320 .

[0061] The piezoelectric plate 310 may be configured to be contactable with the blade 211, and may be configured to be movable in the flow channel 110. The piezoelectric plate 310 may generate electric energy by contacting the blade 211, and the support plate 320 may elastically support the piezoelectric plate 310.

[0062] The piezoelectric plate 310 may be located behind the blade 211 based on the direction in which air flows through the flow channel 110 , and may reciprocate in the front-rear direction by the rotating blade 211 .

[0063] In addition, the piezoelectric plate 310 may be configured to convert mechanical energy (such as vibration, pressure, or impact force) generated by contact with the blade 211 into electrical energy.

[0064] The support plate 320 may be located behind the piezoelectric plate 310 to elastically support the piezoelectric plate 310. Even when the piezoelectric plate 310 is hit and pushed by the blade 211, the support plate 320 may return the piezoelectric plate 310 to its original position so that the piezoelectric plate 310 is continuously hit by the blade 211.

[0065] The piezoelectric plate 310 may be formed to extend in the rotation direction of the blade 211 , and may include a through hole 311 to allow air to flow into the flow channel 110 through the through hole.

[0066] like Figure 4 As shown, due to the through hole 311 , the piezoelectric plate 310 may be formed into a circular shape or an inverted U-shape including a rotation radius of the blade 211 .

[0067] Therefore, when the blade 211 rotates, the piezoelectric plate 310 may be continuously hit by the blade 211 , and air may flow into the flow channel 110 through the through hole 311 formed in the piezoelectric plate 310 .

[0068] In addition, if Figure 5 As shown, the blade 211 may include a striking protrusion 211 a protruding from a surface thereof facing the piezoelectric plate 310 .

[0069] like Figure 5 As shown, since the impact protrusion 211 a is formed on the blade 211 , when the blade 211 rotates, the impact protrusion 211 a may impact the piezoelectric plate 310 , so that the piezoelectric plate 310 may generate electric energy.

[0070] Since the impact protrusion 211a can impact the piezoelectric plate 310, the rotation performance of the blade 211 can be prevented from being deteriorated due to damage to the edge of the blade 211. In addition, the impact force applied to the piezoelectric plate 310 can be increased by contact with the impact protrusion 211a. Therefore, the power generation efficiency of the piezoelectric plate 310 can be improved.

[0071] The piezoelectric plate 310 may include a first piezoelectric element 312 disposed on a first surface 1 a of the piezoelectric plate facing the blade 211 .

[0072] When the blade 211 rotates, the first piezoelectric element 312 disposed on the first surface 1 a of the piezoelectric plate 310 may collide with the blade 211 , thereby generating electric energy.

[0073] A power line A, through which current may flow when the first piezoelectric element 312 generates electric energy, may be connected to the piezoelectric plate 310 .

[0074] As described above, when the blade 211 rotates, the piezoelectric plate 310 can convert mechanical energy generated by the collision between the first piezoelectric element 312 and the blade 211 into electrical energy. In addition, the piezoelectric plate 310 can be elastically supported by the support plate 320, so that it can be continuously hit by the rotating blade 211, thereby generating electrical energy.

[0075] A plurality of first piezoelectric elements 312 may be provided, and the plurality of first piezoelectric elements 312 may be configured to be spaced apart from each other in a rotation direction of the blade 211 .

[0076] Since the piezoelectric plate 310 may include a plurality of first piezoelectric elements 312 , the amount of electric energy generated by the first piezoelectric elements 312 may increase.

[0077] Furthermore, since the first piezoelectric elements 312 may be spaced apart from each other at intervals in the rotation direction of the blade 211 , the first piezoelectric elements 312 may collide with the blade 211 at intervals, thereby reducing damage to the blade 211 due to irregular impacts thereto.

[0078] In addition, each of the first piezoelectric elements 312 may be formed to have an inclined surface whose height gradually increases in the rotation direction of the blade 211 .

[0079] The first piezoelectric element 312 may protrude from the piezoelectric plate 310 toward the blade 211, and a protruding surface of the first piezoelectric element 312 may be inclined so as to gradually increase in height in a rotation direction of the blade 211. Therefore, the blade 211 may move along the inclined surface of the first piezoelectric element 312.

[0080] Therefore, when the blade 211 rotates and contacts the first piezoelectric element 312 , the blade 211 may apply an impact to the first piezoelectric element 312 and may move along the inclined surface of the first piezoelectric element 312 , thereby reducing the rotation resistance of the blade 211 .

[0081] Since the blade 211 can move along the inclined surface of the first piezoelectric element 312, it is possible to prevent the blade 211 from being stuck by the first piezoelectric element 312 and becoming unrotatable, and reduce damage to the blade 211 caused by collision between the blade 211 and the first piezoelectric element 312.

[0082] In addition, if Figure 6 As shown, the piezoelectric plate 310 may include a second piezoelectric element 313 disposed on a second surface 1 b of the piezoelectric plate facing the support plate 320 .

[0083] like Figure 3 and 6As shown, since the second piezoelectric element 313 may be disposed on the second surface 1b of the piezoelectric plate 310, when the piezoelectric plate 310 reciprocates in the front-rear direction by the rotating blade 211, the second piezoelectric element 313 may collide with the support plate 320, thereby generating electric energy.

[0084] The second piezoelectric element 313 may be electrically connected to a power line A provided on the piezoelectric plate 310 to transmit electric energy to an external power source. The second piezoelectric element 313 may be implemented as a piezoelectric film.

[0085] When the blade 211 rotates, the piezoelectric plate 310 may reciprocate and collide with the support plate 320, and the second piezoelectric element 313 may convert mechanical energy generated by the collision into electrical energy, thereby generating electrical energy.

[0086] like Figure 6 and 7 As shown, the support plate 320 may include an elastic member 321 disposed on a surface of the support plate facing the piezoelectric plate 310 . The elastic member 321 may be configured to match the second piezoelectric element 313 .

[0087] The elastic member 321 may be implemented as a spring. The elastic member 321 may be located between the piezoelectric plate 310 and the support plate 320 to elastically support the piezoelectric plate 310 to the support plate 320.

[0088] Therefore, even if the piezoelectric plate 310 is struck and pushed by the blade 211 , the elastic member 321 returns the piezoelectric plate 310 to its original position, so that the piezoelectric plate 310 can be struck by the blade 211 continuously or repeatedly.

[0089] The elastic member 321 may be configured to match the second piezoelectric element 313 in number and position, and may be in contact with the second piezoelectric element 313 .

[0090] In addition, the support plate 320 may include a guide pin 322 formed on a surface of the support plate facing the piezoelectric plate 310. The guide pin 322 may pass through the piezoelectric plate 310 to guide the movement of the piezoelectric plate 310. The elastic member 321 may be placed around the guide pin 322 and may be interposed between the piezoelectric plate 310 and the support plate 320.

[0091] The guide pins 322 may be fixed to the support plate 320 , and may extend toward the piezoelectric plate 310 and be configured to pass through the piezoelectric plate 310 , so that the piezoelectric plate 310 may move along the guide pins 322 .

[0092] In addition, the guide pin 322 may be inserted into the elastic member 321 so that the elastic member 321 is interposed between the piezoelectric plate 310 and the support plate 320. The elastic member 321 may be implemented as a spring, and its position may be maintained between the piezoelectric plate 310 and the support plate 320 due to the guide pin 322 inserted therein.

[0093] Since the piezoelectric plate 310 is movable along the guide pin 322, the piezoelectric plate 310 may move along the guide pin 322 when struck by the blade 211. In addition, since the elastic member 321 may be located around the guide pin 322 and elastically support the piezoelectric plate 310, the piezoelectric plate 310 may reciprocate along the guide pin 322.

[0094] The second piezoelectric element 313 may be provided, and a plurality of the second piezoelectric elements 313 may be configured to be spaced apart from each other in the rotation direction of the blade 211. A plurality of elastic members 321 may also be configured to match the plurality of second piezoelectric elements 313.

[0095] Since a plurality of second piezoelectric elements 313 may be provided on the piezoelectric plate 310 , the amount of electric energy generated by the second piezoelectric elements 313 may be increased.

[0096] Since the second piezoelectric elements 313 may be spaced apart from each other at intervals in the rotation direction of the blade 211 and the elastic member 321 may match the second piezoelectric elements 313 , the elastic member 321 may elastically support the piezoelectric plate 310 and the second piezoelectric elements 313 in a balanced manner.

[0097] In addition, the second piezoelectric element 313 can generate electric energy using impact, vibration or pressure generated by contacting the elastic member 321. Since the elastic member 321 is deformable when contacting the second piezoelectric element 313, the amount of vibration energy generated can be increased, thereby improving the efficiency of generating electric energy.

[0098] According to one embodiment of the present disclosure, Figure 8 and 9 As shown, the rotating part 210 of the first power generation unit 200 may include blades 211 and a rotating shaft 212 , the blades 211 and the power generation unit 220 may be connected to each other via the rotating shaft 212 , and the second power generation unit 300 may generate electric energy by contacting the rotating shaft 212 .

[0099] When the blades 211 constituting the rotating part 210 of the first power generation unit 200 rotate by airflow, the rotating shaft 212 may rotate to generate power from the power generation part 220. In addition, the second power generation unit 300 may be struck by the rotating rotating shaft 212 to generate power in a piezoelectric manner.

[0100] The housing 100 may be divided into a flow channel 110 and a power generation space 120 . The blades 211 may be disposed in the flow channel 110 , and the second power generation unit 300 and the power generation part 220 may be located in the power generation space 120 .

[0101] Therefore, the blades 211 of the rotating part 210 may be rotated by the air in the flow channel 110 flowing through the inlet and outlet of the housing 100. The power generation space 120 accommodating the second power generation unit 300 and the power generation part 220 may be sealed to prevent external contamination.

[0102] The energy collection device according to an embodiment may be configured to cause the rotating shaft 212 to hit the second power generation unit 300 while rotating.

[0103] The rotating shaft 212 may extend so as to pass through the flow channel 110 and the power generation space 120, and may be connected to the blades 211 and the power generation part 220, and may include: an impact part 213 extending radially from the rotating shaft in the power generation space 120. The second power generation unit 300 may be disposed within the rotation radius of the impact part 213 in the power generation space 120.

[0104] Since the rotating shaft 212 may pass through the flow channel 110 and the power generation space 120, the rotating shaft 212 may be connected to the blades 211 in the flow channel 110 and the power generation part 220 in the power generation space 120. In addition, since the impact part 213 may extend radially in the power generation space 120, the impact part 213 may contact the second power generation unit 300 when rotating.

[0105] Since the second power generation unit 300 may be located within the rotation radius of the impact portion 213 in the power generation space 120 , as the rotation shaft 212 rotates, the second power generation unit 300 may be impacted by the impact portion 213 rotating at the rotation radius, thereby converting mechanical energy generated by the collision into electrical energy.

[0106] The impact part 213 may include a rounded distal end configured to be contactable with the second power generation unit 300. The second power generation unit 300 may include a portion facing the impact part 213 when the impact part 213 rotates, and the portion may be formed to be inclined.

[0107] Since the impact portion may extend from the rotating shaft 212 and include a rounded distal end, and the portion of the second power generation unit 300 in contact with the impact portion 213 may be bent to tilt, the impact portion 213 in contact with the second power generation unit 300 may slide on the bent portion of the second power generation unit 300, thereby reducing the rotational resistance of the impact portion 213.

[0108] Therefore, when the impact part 213 rotates and contacts the second power generation unit 300, the impact part 213 may apply an impact to the second power generation unit 300 and then may slide on the curved portion of the second power generation unit 300, thereby avoiding being stuck by the second power generation unit 300 and becoming unrotatable.

[0109] In addition, the second power generation unit 300 may be configured to generate electric energy by elastic deformation thereof. A plurality of second power generation units 300 may be provided and may be located around the power generation portion 220 and configured to be spaced apart from each other along the outer circumference of the power generation portion 220 .

[0110] Each of the plurality of second power generating units 300 may be implemented as a piezoelectric element. When the striking portion 213 rotates and contacts the second power generating unit 300, the second power generating unit 300 may convert mechanical energy into electrical energy.

[0111] Since the plurality of second power generating units 300 can be arranged to be spaced apart from each other along the periphery of the power generating portion 220, the amount of electric energy generated can be increased proportionally with the increase in the number of second power generating units 300 contacting the impact portion 213. In addition, by optimizing the placement of the power generating portion 220 and the second power generating units 300, the overall size of the device can be reduced.

[0112] Therefore, the power generation part 220 may convert the rotation force of the single rotating shaft 212 into electric energy, and at the same time, the striking part 213 may rotate with the rotation of the rotating shaft 212 and may strike the second power generation unit 300, so that the second power generation unit 300 may also generate electric energy.

[0113] like Figure 8 and 9 As shown, the energy collection device according to the embodiment can be placed in a horizontal direction to generate electric energy using airflow introduced in a direction opposite to the travel direction of the moving vehicle. Fig.10 and 11 As shown, the energy harvesting device according to the embodiment can be placed in a vertical direction, and thus can be installed at different positions of a mobile vehicle to generate electrical energy.

[0114] As is apparent from the above description, according to the energy collection device of the above configuration, electric energy can be generated by rotating the blades by the airflow generated during the running of the moving vehicle. In addition, electric energy can also be additionally generated by the pressure and impact force generated during the rotation of the blades. Therefore, the amount of electric energy generated can be increased.

[0115] Furthermore, when the blades rotate at a high speed as the traveling speed of a moving vehicle increases, pressure and impact can be reduced to avoid damage to the blades or the piezoelectric element, thereby improving durability thereof.

[0116] Although the embodiments of the present disclosure 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 disclosure as disclosed in the accompanying claims.

Claims

1. An energy harvesting device, in, include: A housing, comprising: a flow channel formed in the housing and configured to allow air to flow through; a first power generation unit mounted to the housing, the first power generation unit including a rotating portion and a power generation portion, the first power generation unit being configured such that when the rotating portion is rotated by air flowing through the flow passage, the power generation portion generates electric energy using a rotational force; and The second power generation unit is mounted to the housing and is configured to be contactable with the rotating portion. The second power generation unit is configured to generate electric energy by being struck by the rotating portion when the rotating portion rotates.

2. The device according to claim 1, wherein: The rotating part of the first power generation unit includes blades and a rotating shaft, wherein the blades and the power generation unit are connected to each other via the rotating shaft, and Wherein, the second power generation unit is configured to generate electrical energy by contacting the blade.

3. The device according to claim 2, wherein: The second power generation unit includes a piezoelectric plate and a support plate, The piezoelectric plate is configured to be in contact with the blade, to be movable in the flow channel, and to generate electrical energy by contacting the blade, and Wherein, the support plate elastically supports the piezoelectric plate.

4. The device according to claim 3, wherein: The piezoelectric plate extends along a rotation direction of the blade, and wherein the piezoelectric plate includes a through hole formed in the piezoelectric plate, so that air flows through the through hole and flows into the flow channel.

5. The device according to claim 3, wherein: The blade includes an impact protrusion protruding from a surface of the blade facing the piezoelectric plate.

6. The device according to claim 3, wherein: The piezoelectric plate includes a first piezoelectric element disposed on a first surface of the piezoelectric plate facing the blade.

7. The device according to claim 6, wherein: A plurality of the first piezoelectric elements are provided, and the plurality of first piezoelectric elements are arranged to be spaced apart from each other in a rotation direction of the blade.

8. The device according to claim 6, wherein: The first piezoelectric element is formed to have an inclined surface whose height gradually increases in the rotation direction of the blade.

9. The device according to claim 3, wherein: The piezoelectric plate includes a second piezoelectric element disposed on a second surface of the piezoelectric plate facing the support plate.

10. The device according to claim 9, wherein: The support plate includes an elastic member provided on a surface of the support plate facing the piezoelectric plate, and Wherein, the elastic member is configured to match the second piezoelectric element.

11. The device according to claim 10, wherein: The support plate includes: guide pins formed on a surface of the support plate facing the piezoelectric plate, wherein the guide pin passes through the piezoelectric plate to guide the movement of the piezoelectric plate, and Wherein, the elastic member is located around the guide pin and between the piezoelectric plate and the support plate.

12. The device according to claim 10, wherein: A plurality of the second piezoelectric elements are provided, and the plurality of second piezoelectric elements are arranged to be spaced apart from each other in the rotation direction of the blade, and Wherein, a plurality of the elastic components are configured to match the plurality of second piezoelectric elements.

13. An energy harvesting device, in, include: A housing, comprising: a flow channel formed in the housing and configured to allow air to flow through; a first power generation unit mounted to the housing, the first power generation unit including a rotating portion and a power generation portion, the first power generation unit being configured such that when the rotating portion is rotated by air flowing through the flow passage, the power generation portion generates electric energy using a rotational force; and; a second power generation unit mounted to the housing and configured to be contactable with the rotating portion, the second power generation unit being configured to generate electric energy by being struck by the rotating portion when the rotating portion rotates, wherein the rotating part of the first power generation unit comprises blades and a rotating shaft, wherein the blades and the power generation part are connected to each other via the rotating shaft, and Wherein, the second power generation unit is configured to generate electrical energy by contacting the rotating shaft.

14. The device according to claim 13, wherein: The housing is divided into a flow channel and a power generation space. Wherein, the blade is located in the flow channel, and Wherein, the second power generation unit and the power generation part are located in the power generation space.

15. The device according to claim 14, wherein: The rotating shaft extends to pass through the flow channel and the power generation space and is connected to the blades and the power generation portion, wherein the rotating shaft includes: an impact portion extending from the rotating shaft in a radial direction in the power generation space, and Wherein, the second power generation unit is located within the rotation radius of the impact part in the power generation space.

16. The device according to claim 15, wherein: The impact portion includes: a circular distal end configured to be contactable with the second power generation unit, and Wherein, the second power generation unit includes: when the impact part rotates, the inclined part faces the impact part.

17. The device according to claim 14, wherein: The second power generation unit is configured to generate electrical energy by elastic deformation, and There are a plurality of second power generation units, which are located around the power generation part and are arranged to be spaced apart from each other along the periphery of the power generation part.

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