阅读说明：本技术 一种基于摩擦电效应的雨水能量收集系统及收集方法 (Rainwater energy collecting system and method based on triboelectric effect ) 是由 周致富 宋德培 黄羿珲 张鹏 夏雨晨 高雨轩 陈斌 于 2020-05-26 设计创作，主要内容包括：本发明一种基于摩擦电效应的水滴能量收集系统及收集方法,系统包括液滴喷雾装置、旋转式液滴发电机和外部负载电路；液滴喷雾装置包括储水罐和雾化喷嘴,雾化喷嘴喷出形成雾状液滴；旋转式液滴发电机包括发电机外壳、叶片、支撑肋、同心圆环电极、正极引出电极和负极引出电极；多个所述叶片沿径向分布在发电机外壳外部；雾状液滴喷向所述叶片表面；多个所述叶片之间电路串联,串联后的正负极分别连接正极引出电极和负极引出电极；同心圆环电极和支撑肋安装在发电机外壳内部,正极引出电极和负极引出电极与同心圆环电极形成电刷；所述外部负载电路与电刷电连接。本发明可以通过液滴的反复撞击或使用压电效应产生电场,实现高效的发电。(The invention relates to a water drop energy collecting system and a water drop energy collecting method based on a triboelectric effect, wherein the system comprises a liquid drop spraying device, a rotary type liquid drop generator and an external load circuit; the liquid drop spraying device comprises a water storage tank and an atomizing nozzle, and the atomizing nozzle sprays out liquid drops to form mist; the rotary liquid drop generator comprises a generator shell, blades, support ribs, concentric ring electrodes, a positive electrode leading-out electrode and a negative electrode leading-out electrode; a plurality of the blades are distributed outside the generator shell in the radial direction; spraying the atomized liquid drops to the surface of the blade; the blades are connected in series through a circuit, and the positive electrode and the negative electrode after being connected in series are respectively connected with a positive electrode leading-out electrode and a negative electrode leading-out electrode; the concentric ring electrode and the supporting ribs are arranged in the generator shell, and the positive electrode leading-out electrode and the negative electrode leading-out electrode form electric brushes with the concentric ring electrode; the external load circuit is electrically connected to the brushes. The invention can generate an electric field by repeated impact of liquid drops or by using a piezoelectric effect, thereby realizing high-efficiency power generation.)

1. A rainwater energy collecting system based on a triboelectric effect is characterized by comprising a liquid drop spraying device (a), a rotary liquid drop generator (b) and an external load circuit (c);

the liquid droplet spraying device (a) comprises a water storage tank (16) and an atomizing nozzle (6), and water in the water storage tank (16) is sprayed out through the atomizing nozzle (6) to form mist-shaped liquid droplets;

the rotary liquid drop generator (b) comprises a generator shell (9), blades (18), support ribs (8), concentric ring electrodes (12), a positive electrode leading-out electrode (10) and a negative electrode leading-out electrode (11);

a plurality of said blades (18) being radially distributed outside the generator casing (9); the atomized liquid drops are sprayed to the surface of the blade (18); the blades (18) are connected in series in a circuit, and the anode and the cathode after being connected in series are respectively connected with the anode leading-out electrode (10) and the cathode leading-out electrode (11);

the concentric ring electrode (12) and the support rib (8) are arranged inside a generator shell (9), the ends of the positive electrode leading-out electrode (10) and the negative electrode leading-out electrode (11) are arranged on the support rib (8), the positive electrode leading-out electrode (10) and the negative electrode leading-out electrode (11) are respectively in contact with inner and outer ring brushes of the concentric ring electrode (12), and the support rib (8) and the concentric ring electrode (12) rotate relatively; the positive electrode leading-out electrode (10) and the negative electrode leading-out electrode (11) and the concentric ring electrode (12) form an electric brush;

the external load circuit (c) is connected to the brush.

2. The rainwater energy collecting system based on the triboelectric effect according to claim 1, wherein the droplet spraying device (a) further comprises a high-pressure nitrogen gas bottle (17), a pressure reducing valve (22), an ion source solution chamber (15) and an ion concentration meter (23), the high-pressure nitrogen gas bottle (17) is connected with the water storage tank (16) through a closed pipeline via the pressure reducing valve (22), the ion source solution chamber (15) is connected with the water storage tank (16), the ion concentration meter (23) is arranged on the water storage tank (16), and a probe of the ion concentration meter (23) is immersed in the water storage tank (16).

3. A rainwater energy collection system based on the triboelectric effect according to claim 1 characterized in that the atomizing nozzle (6) is provided with a control valve (24) for controlling the spray droplet size, velocity and density.

4. The rainwater energy collecting system based on the triboelectric effect according to claim 1, wherein the blade (18) comprises a high polymer film (1), a conductive medium (2), a piezoelectric film (3), an aluminum electrode (4), a positive connecting wire (14) and a negative connecting wire (5), the aluminum electrode (4), the high polymer film (1), the conductive medium (2) and the piezoelectric film (3) are sequentially attached and connected, a positive electrode led out from the piezoelectric film (3) is connected with the conductive medium (2) through the positive connecting wire (14), and a negative electrode led out from the piezoelectric film (3) is connected with the aluminum electrode (4) through the negative connecting wire (5); the blades (18) are connected in series through a positive connecting lead (14) and a negative connecting lead (5).

5. The system according to claim 1, wherein the concentric ring electrodes (12) comprise an insulating substrate (13) and two concentrically arranged ring graphite electrodes, and the two ring graphite electrodes are fixed on the inner and outer rings of the insulating substrate (13).

6. The rainwater energy collecting system based on the triboelectric effect according to claim 5, wherein one end of the supporting rib (8) is connected with the outer shell (9), and the other end is converged to the through-shaft hole (7) at the center of the circumference; a rotating shaft is arranged in the through shaft hole (7), the other end of the rotating shaft is connected with the center of the insulating substrate (13), and the concentric ring electrode (12) is fixed.

7. The rainwater energy collecting system based on the triboelectric effect as claimed in claim 1, wherein the positive lead-out electrode (10) and the negative lead-out electrode (11) are fixed on a set of symmetrical support ribs (8), and the distances between the positive lead-out electrode (10) and the negative lead-out electrode (11) and the centers of the concentric ring electrodes (12) are different, and the rotation tracks form concentric circles.

8. A rainwater energy harvesting system based on the triboelectric effect according to claim 1, characterised in that the external load circuit c comprises an AC-DC circuit (20) and a load (21); the AC-DC conversion circuit (20) is connected to the brushes and the AC-DC circuit is connected to the load (21).

9. The system according to claim 1, wherein the load is a network of LED lamps or other DC loads.

10. A rainwater energy collecting method based on a triboelectric effect is characterized by comprising the following steps:

water in the water storage tank (16) is sprayed out through the atomizing nozzle (6) to form mist-shaped liquid drops;

the spray droplet group impacts the blades (18), the blades (18) rotate to drive the support ribs (8) to rotate, so that the blades (18) alternately receive spray impact, and residual droplets are quickly discharged from the surfaces of the blades (18);

the liquid drop group formed by spraying collides with the blades (18) and generates electric charges by friction, the positive and negative electrodes of the blades (18) are respectively connected to the positive electrode leading-out electrode (10) and the negative electrode leading-out electrode (11) after being connected in series, the positive electrode leading-out electrode (10) and the negative electrode leading-out electrode (11) and the concentric ring electrode (12) form an electric brush, and the generated current is led out to an external load circuit (c).

Technical Field

The invention belongs to the field of nano friction power generation, and particularly relates to a rainwater energy collecting system and method based on a triboelectric effect.

Background

Today, the situation of energy is becoming more serious, how to obtain energy cleanly and efficiently becomes a problem which cannot be ignored, and the abundant rainfall resources and tides in the nature can become a clean energy source. However, conventional hydroelectric power generation mainly uses an electromagnetic generator, which requires sufficient water supply and is heavy and inefficient, and thus is not suitable for collecting energy of small-scale rainwater.

Disclosure of Invention

The invention aims to provide a rainwater energy collecting system and method based on a triboelectric effect, and aims to solve the technical problem that small-scale energy cannot be fully utilized in the prior art. The invention can collect energy from the impinging water droplets, not only can generate a large amount of charges, but also can realize the rapid transfer of the charges. The instantaneous power can be increased by several orders of magnitude compared to existing friction generators. The energy collecting system can be widely applied to collecting rainwater energy.

In order to solve the technical problems, the invention is realized by the following technical scheme:

a rainwater energy collecting system based on triboelectric effect comprises a liquid drop spraying device, a rotary liquid drop generator and an external load circuit;

the liquid drop spraying device comprises a water storage tank and an atomizing nozzle, and water in the water storage tank is sprayed out through the atomizing nozzle to form atomized liquid drops;

the rotary liquid drop generator comprises a generator shell, blades, support ribs, concentric ring electrodes, a positive electrode leading-out electrode and a negative electrode leading-out electrode;

a plurality of the blades are distributed outside the generator shell in the radial direction; the atomized liquid drops are sprayed to the surface of the blade; the blades are connected in series through a circuit, and the positive electrode and the negative electrode after being connected in series are respectively connected with a positive electrode leading-out electrode and a negative electrode leading-out electrode;

the concentric ring electrode and the support rib are arranged in the generator shell, the end parts of the positive electrode leading-out electrode and the negative electrode leading-out electrode are arranged on the support rib, the positive electrode leading-out electrode and the negative electrode leading-out electrode are respectively contacted with the inner ring brush and the outer ring brush of the concentric ring electrode, and the support rib and the concentric ring electrode rotate relatively; the positive electrode leading-out electrode and the negative electrode leading-out electrode form an electric brush with the concentric ring electrode;

the external load circuit is connected to the brushes.

As a further improvement of the invention, the droplet spraying device also comprises a high-pressure nitrogen bottle, a pressure reducing valve, an ion source solution chamber and an ion concentration meter, wherein the high-pressure nitrogen bottle is connected with the water storage tank through a closed pipeline by the pressure reducing valve, the ion source solution chamber is connected with the water storage tank, the ion concentration meter is arranged on the water storage tank, and a probe of the ion concentration meter is immersed in the water storage tank.

As a further improvement of the invention, the atomizing nozzle is provided with a control valve for controlling the size, speed and density of the spray droplets.

As a further improvement of the invention, the blade comprises a high polymer film, a conductive medium, a piezoelectric film, an aluminum electrode, a positive connecting wire and a negative connecting wire, wherein the aluminum electrode, the high polymer film, the conductive medium and the piezoelectric film are sequentially attached and connected, the positive electrode led out by the piezoelectric film is connected with the conductive medium through the positive connecting wire, and the negative electrode led out by the piezoelectric film is connected with the aluminum electrode through the negative connecting wire; the blades are connected in series through a positive connecting wire and a negative connecting wire.

As a further improvement of the invention, the concentric ring electrode comprises an insulating substrate and two concentrically arranged annular graphite electrodes, and the two annular graphite electrodes are fixed on the inner ring and the outer ring of the insulating substrate.

As a further improvement of the invention, one end of the support rib is connected with the shell, and the other end of the support rib is converged to the through-shaft hole at the center of the circumference; a rotating shaft is arranged in the shaft passing hole, the other end of the rotating shaft is connected with the center of the insulating substrate, and the concentric ring electrode is fixed.

As a further improvement of the invention, the anode leading-out electrode and the cathode leading-out electrode are fixed on a group of symmetrical supporting ribs, the anode leading-out electrode and the cathode leading-out electrode are different in distance from the center of the concentric ring electrode, and the rotating tracks form concentric circles.

As a further improvement of the present invention, the external load circuit c includes an AC-DC circuit and a load; the AC-DC conversion circuit is connected with the electric brush, and the AC-DC circuit is connected with the load.

As a further improvement of the invention, the load is a network formed by a plurality of LED lamps or other direct current loads.

A rainwater energy collecting method based on a triboelectric effect comprises the following steps:

spraying water in the water storage tank through an atomizing nozzle to form mist-shaped liquid drops;

the spray liquid drop group impacts the blades, and the blades rotate to drive the support ribs to rotate, so that the blades receive spray impact alternately, and residual liquid drops are discharged from the surfaces of the blades quickly;

the liquid drop group formed by spraying collides with the blades and generates electric charges by friction, the positive and negative electrodes of the blades are respectively connected to the positive electrode leading-out electrode and the negative electrode leading-out electrode after being connected in series, the positive electrode leading-out electrode, the negative electrode leading-out electrode and the concentric ring electrode form electric brushes, and generated current is led out to an external load circuit.

Compared with the prior art, the invention has the beneficial effects that:

compared with the traditional liquid drop generator, the rainwater energy collecting system based on the triboelectric effect can generate an electric field by repeated impact of liquid drops or the piezoelectric effect to promote the electronic exchange between the liquid drops and a high polymer film, so that the charge density of the solid surface is greatly improved, and the solid surface is provided with enough charges to realize efficient power generation. The liquid drop spraying device converts rainwater into fog-like liquid drops, collects energy from the impacted liquid drops through the rotary liquid drop generator, and not only can generate a large amount of charges, but also can realize quick transfer of the charges. The instantaneous power can be increased by several orders of magnitude compared to existing friction generators. The energy collecting system can be widely applied to collecting rainwater energy and supplies power for an external load circuit.

Further, a Field Effect Transistor (FET) like triode structure design is adopted, an aluminum electrode and a conductive medium (such as ITO glass) are respectively equivalent to a source electrode and a drain electrode, a high polymer film (such as polytetrafluoroethylene) is equivalent to a grid electrode, and a liquid drop with ions and the high polymer film form a channel to connect the drain electrode and the source electrode, so that a body effect is generated. When the contact area of the liquid drop and the aluminum electrode is reduced from the maximum to the liquid drop separation, the charge moving direction is turned, and the liquid drop is transferred from the aluminum electrode to the conductive medium. The circuit forms a closed loop during the contact of the droplet with the aluminum electrode, so that a large amount of charge caused by friction is rapidly transferred to form a current.

Furthermore, the motor blade is simple in design, materials with special functions such as super-hydrophobicity are not needed, the generator is directly formed by the conventional PTFE film, the ITO conductive glass plate, the aluminum electrode and the piezoelectric film, water drops can rapidly leave the surface after colliding with the device, charges are separated, and accordingly the negative charge quantity of the PTFE surface is increased. The impeller type structure is adopted to adapt to the impact of large water volume, and under the design, materials with special functions of super hydrophobicity and the like are not needed.

Further, the piezoelectric film is used for realizing pre-charging of the device in the liquid drop impact process, the time required by charge accumulation till saturation is shortened, and the piezoelectric film can be charged enough to realize efficient power generation.

Furthermore, the liquid drop spraying device driven by the air pressure controller is adopted, the back pressure of the outlet of the atomizing nozzle can be accurately controlled, so that the speed and the flow of the fog drops are effectively controlled, stable fog drops are generated, the power generation frequency is greatly improved, and the current is more stable.

Drawings

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

FIG. 1 is a schematic diagram of a rainwater energy collecting system based on a triboelectric effect (taking four blades as an example) according to the present invention;

FIG. 2 is a schematic diagram of an installation of an RDEG plant;

FIG. 3 is a test chart of FIG. 2;

FIG. 4 is a three-dimensional schematic diagram of the structure of an impeller of an RDEG device;

FIG. 5 is a three-dimensional schematic view of the blade structure of the RDEG device.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

The invention is further illustrated by way of example in the following figures.

Referring to fig. 1, the present invention is a rainwater energy collecting system based on a triboelectric effect, which includes a droplet spraying device a, a rotary droplet generator b and an external load circuit c.

The droplet spraying device a is composed of a high-pressure nitrogen cylinder 17, a pressure reducing valve 22, an ion source solution chamber 15, an ion concentration meter 23, a control valve 24, an atomizing nozzle 6 and a water storage tank 16, wherein the high-pressure nitrogen cylinder 17 is connected with the water storage tank 16 through the pressure reducing valve 22 through a closed pipeline, the ion source solution chamber 15 is connected with the water storage tank 16, the ion concentration meter 23 is arranged to monitor the ion concentration in the water storage tank so as to control the amount of solution in the ion source solution chamber, and a probe of the ion concentration meter is immersed in the water storage tank. The atomizing nozzle 6 is provided with a control valve 24 for maintaining the pressure at the upstream of the atomizing nozzle constant, the pressure at the outlet of the atomizing nozzle is atmospheric pressure, and the ionic solution is atomized in the atomizing nozzle 6.

The outlet of a high-pressure nitrogen cylinder 17 in the liquid drop spraying device a is connected with a pressure reducing valve 22, the outlet of the pressure reducing valve is connected with a water storage tank 16 and is connected with a closed pipeline, a control valve 24 is connected below the water storage tank 16, the outlet of the control valve 24 is connected with the inlet of an atomizing nozzle 6, and water in the water storage tank 16 is sprayed out from the control valve 24 and the atomizing nozzle 6 through a connecting pipeline to form atomized liquid drops.

The rotary liquid drop generator b receives the atomized liquid drops, a liquid drop group formed by spraying collides with the high polymer film 1 on the upper surfaces of the blades 18 and rubs to generate electric charges, the anodes and the cathodes of the blades 18 are respectively connected to the anode leading-out electrode 10 and the cathode leading-out electrode 11 after being connected in series, the anode leading-out electrode 10 and the cathode leading-out electrode 11 and the concentric ring electrode 12 form electric brushes, and the electric brushes are connected with an external load circuit c to drive a load 21; the spray droplet group impacts the blades 18, the blades 18 rotate to drive the support ribs 8 to rotate, so that the blades 18 alternately receive spray impact, residual droplets are rapidly discharged from the surface of the high polymer film 1, and the continuity of friction power generation is ensured.

Referring to fig. 2 and 3, the rotary friction generator is composed of blades 18, a support structure and concentric ring electrodes.

The blade 18 comprises a high polymer film 1, a conductive medium 2, a piezoelectric film 3, an aluminum electrode 4, a positive electrode connecting lead 14 and a negative electrode connecting lead 5. The high polymer film 1 may be made of Polytetrafluoroethylene (PTFE), butyl rubber, or the like, and the conductive medium 2 may be made of ITO conductive glass, or the like.

The aluminum electrode 4, the high polymer film 1, the conductive medium 2 and the piezoelectric film 3 are tightly adhered in sequence. The positive pole led out from the piezoelectric film 3 is connected with the conductive medium 2 through a positive pole connecting lead 14, and the negative pole led out from the piezoelectric film 3 is connected with the aluminum electrode 4 through a negative pole connecting lead 5, so that the piezoelectric film 3 is connected in parallel with the blade 18 circuit. The electrodes of the blades 18 are connected in series, the positive and negative electrodes of the blades are respectively connected to the positive electrode leading-out electrode 10 and the negative electrode leading-out electrode 11, and the positive electrode leading-out electrode 10, the negative electrode leading-out electrode 11 and the concentric ring electrode 12 form brush output current.

As a preferred embodiment, the blade 18 includes a Polytetrafluoroethylene (PTFE) film 1, an ITO conductive glass 2, a piezoelectric film 3, an aluminum electrode 4, a negative electrode connection wire 5, and a positive electrode connection wire 14. The PTFE film 1 is prepared by depositing a PTFE precursor on ITO glass 3, heating at 120 ℃ for 15 minutes and curing, wherein the piezoelectric film 3 is adhered to the back side of the ITO conductive glass 2, the anode led out of the piezoelectric film is connected with the ITO conductive glass 2, and the cathode is connected with an aluminum electrode 4.

The support structure comprises a generator shell 9, a support rib 8, a shaft hole 7, a positive electrode extraction electrode 10 and a negative electrode extraction electrode 11. The shaft hole 7 is in interference fit with the rotating shaft, and the positive electrode and the negative electrode of the four blades are respectively connected with the positive electrode leading-out electrode 10 and the negative electrode leading-out electrode 11 after being connected in series. The positive electrode extraction electrode 10 and the negative electrode extraction electrode 11 are fixed on a group of symmetrical ribs, the distances between the two extraction electrodes and the rotating shaft are different, and the rotating tracks form concentric circles.

The concentric ring electrode is composed of inner and outer concentric ring electrodes 12 and an insulating substrate 13. The two annular electrodes of the inner ring and the outer ring are fixed on the inner ring and the outer ring of the insulating substrate, the material is graphite, the two annular electrodes are respectively contacted with a positive electrode leading-out electrode 10 and a negative electrode leading-out electrode 11 of the supporting structure, meanwhile, a shaft passing hole is formed in the center of the insulating substrate and is not matched with the rotating shaft, and the graphite brush is fixed in the working process.

In a preferred embodiment, the number of the blades 18 is multiple, the number of the blades is related to the speed and the density of the sprayed liquid drops, the number of the blades is larger than the minimum number of the blades for maintaining the continuous rotation and the power generation continuity of the device, each blade 18 is uniformly arranged on the circular generator shell 9 along the circumference, one end of the supporting rib 8 is connected with the shell 9, and the other end of the supporting rib is converged to the circumferential central through shaft hole 7.

After the plurality of blades 18 are connected in series, the positive electrode and the negative electrode are respectively connected with the positive electrode extraction electrode 10 and the negative electrode extraction electrode 11. The positive electrode extraction electrode 10 and the negative electrode extraction electrode 11 are fixed on a group of symmetrical support ribs 8, the distances between the two extraction electrodes are different from the center, and the rotation tracks form concentric circles. The concentric ring electrodes 12 are fixed on the insulating substrate 13, the two concentric ring electrodes 12 are respectively contacted with the positive and negative leading- out electrodes 10 and 11, and the insulating substrate 13 is provided with a through-shaft hole 7 at the center which is not matched with the rotating shaft.

Referring to fig. 1, an AC-DC conversion circuit 20 of the present invention is connected to brushes formed by a positive electrode leading electrode 10, a negative electrode leading electrode 11 and a concentric ring electrode 12 for conditioning a high frequency AC signal and converting the high frequency AC signal into a DC signal, and the AC-DC conversion circuit is connected to a load 21, where the external load may be a network formed by a plurality of LED lamps or other DC loads.

Referring to fig. 5, the blade structure of the present invention is shown in fig. 5, where the aluminum electrode 4 is in a shape of a thin sheet or a rod, bent into a serpentine shape, and adhered to the surface of the PTFE layer 1 by an insulating tape, and connected to the negative electrode of the piezoelectric film, the PTFE film is adhered to the ITO conductive glass 2, and the ITO conductive glass plate 2 is connected to the positive electrode of the piezoelectric film 3. The parallel connection mode of the piezoelectric film and the friction power generation device can enhance the driving force of electron transfer between PTFE and rainwater, reduce the impact times required by the saturation of the charge concentration on the PTFE film, and improve the maximum charge concentration on the surface of the PTFE.

The invention adopts an impeller type structure, please refer to fig. 3 and 4, the design is simple, materials with special functions such as super-hydrophobicity and the like are not needed, and a generator is directly formed by a conventional PTFE film 1, an ITO conductive glass plate 2, a piezoelectric film 3 and an aluminum electrode 4, so that water drops can quickly leave the surface after colliding with the device, and the charges are separated. The impeller type structure can improve the power generation frequency, strengthen the surface drainage effect and adapt to the high-frequency impact of liquid drops.

In the invention, a liquid drop spraying device driven by an air pressure controller is adopted, as shown in figure 1, an atomizing nozzle 6 can atomize a solution containing ions, and a control valve 24 of the atomizing nozzle can accurately control the back pressure of an outlet of the atomizing nozzle, so that the speed and the flow of fog drops are effectively controlled, stable fog drops are generated, the power generation frequency is greatly improved, and the current is more stable.

The atomizing nozzle 6 uses a high-pressure nitrogen gas bottle 17 to pressurize and spray the liquid in the water storage tank 16 in a spray form, and atomized liquid drop groups are generated to impact a blade 18. Spray droplet size, velocity and density can be adjusted by pressure relief valves or by varying the atomizing nozzle form and internal diameter.

The water drop energy collecting system based on the triboelectric effect can collect energy from the impacted water drops. The device uses a high polymer film on a conductive medium substrate and an electrode material to form an electric system, and adopts a Field Effect Transistor (FET) like triode structure design, so that a closed loop is formed in the whole power generation process, a large amount of charges can be generated, and the rapid transfer of the charges can be realized. The instantaneous power can be increased by several orders of magnitude compared to existing friction generators. The energy collecting system can be widely applied to collecting rainwater energy.

The droplet spraying device mainly forms spraying droplets through a high-pressure nitrogen cylinder, droplet groups formed by spraying collide with a high polymer film on the upper surface of the rotating blade and generate charges through friction, the charges are transferred through a lead to lead out an electrode, and an external load can be driven through a conversion circuit. The spray droplet group impacts the blades, and the blades rotate to drive the support ribs to rotate, so that the blades are impacted by spray alternately, residual droplets are discharged from the surface of the high polymer film quickly, and the continuity of friction power generation is ensured.

The device uses a conductive medium such as a high polymer film such as a teflon film on an indium tin oxide substrate and an electrode material to form an electrical system to collect energy from impinging water droplets. The Field Effect Transistor (FET) like triode structure design is adopted, so that a closed loop is formed in the whole power generation process, a large amount of charges can be generated, and the charges can be rapidly transferred. The instantaneous power can be increased by several orders of magnitude compared to existing friction generators. The energy collecting system can be widely applied to collecting rainwater energy.

The invention also provides a rainwater energy collecting method based on the triboelectric effect, which comprises the following steps:

water in the water storage tank 16 is sprayed out through the atomizing nozzle 6 to form mist-shaped liquid drops;

the spray droplet group impacts the blades 18, the blades 18 rotate to drive the support ribs 8 to rotate, so that the blades 18 alternately receive spray impact, and residual droplets are quickly discharged from the surfaces of the blades 18;

the liquid drop group formed by spraying collides with the blades 18 and generates electric charges by friction, the positive and negative electrodes of the plurality of blades 18 are respectively connected to the positive electrode leading-out electrode 10 and the negative electrode leading-out electrode 11 after being connected in series, the positive electrode leading-out electrode 10, the negative electrode leading-out electrode 11 and the concentric ring electrode 12 form electric brushes, and generated current is led out to an external load circuit c.

Compared with the traditional liquid drop generator, the liquid drop generator adopts an impeller type structure with a plurality of electrode blades to adapt to the impact of large water volume, and can realize that liquid drops are quickly separated from the surface of an electrode after impacting by utilizing the rotation and the gravity of the liquid drops. And the novel liquid drop generator uses the piezoelectric film to realize the pre-charging of the device in the liquid drop impact process, shortens the time required by charge accumulation until saturation, and enables the liquid drop generator to have enough charges to realize efficient power generation. In addition, the invention adopts the liquid drop spraying device driven by the air pressure controller of the pressurized gas, and can accurately control the speed and the flow of the fog drops, thereby generating stable fog drops.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The terms "first," "second," "third," "fourth," and the like in the description of the application and the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, B, or C, may represent: a, B, C, "A and B", "A and C", "B and C", or "A and B and C", wherein A, B, C may be single or plural.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.