CN110771487A - Atomization generating device for atomization cultivation and atomization cultivation method - Google Patents

Abstract

The invention provides an atomization generating device for atomization cultivation, which can realize the particle size sorting of liquid drops generated by an atomization device in a low-cost mode so as to control the particle size applied to the liquid drops within a desired range according to requirements. Further, an atomization cultivation method using the atomization generation device for atomization cultivation is also provided.

Description

Atomization generating device for atomization cultivation and atomization cultivation method

Technical Field

The invention relates to the technical field of soilless culture, in particular to an atomization generating device for aerial fog culture or atomization culture.

Background

The atomization cultivation is a brand new cultivation mode based on engineering technology, biotechnology and computer control technology, particularly aiming at hygrophilous plants such as dendrobium officinale, strawberries, orchids and the like, the cultivation method can enable the plants to grow in an optimal state, and has unique technical advantages for accelerating the growth speed of the plants, shortening the growth period and improving the yield.

Although the atomization cultivation has the advantages, the cultivation method still has unsatisfactory effect in practical use, and particularly, compared with the existing cultivation method with soil, the cultivation method with atomization cultivation is more prone to fester or lesion, such as powdery mildew, of the hygrophilous plants such as dendrobium officinale, strawberries, orchids and the like, so that the yield and the quality of cultivation are affected. Due to the problems, many farmers are doubtful about applying the atomization cultivation technology to the preferential wet plants such as dendrobium officinale, strawberries, orchids and the like, which greatly influences the popularization and the spread of the atomization cultivation technology.

Therefore, there is still a need in the industry to provide a satisfactory cultivation method by atomization and an atomization generating device for cultivation by atomization.

Disclosure of Invention

The present invention is to provide an atomization generator and an atomization cultivation method for atomization cultivation, which can solve at least some of the above-mentioned disadvantages of the prior art.

According to an aspect of the present invention, there is provided an atomization generator for cultivation by atomization for forming liquid droplets having a droplet size suitable for cultivation by atomization of a hygrophilous plant, wherein the atomization generator comprises: a housing, the housing being generally concave bowl-shaped; a classifier disposed within the housing, the classifier being generally convex spherical; the outlet end of the shell is connected to the shell to form an inner space for accommodating the separator, and a plurality of holes for liquid drops to escape are formed in the outlet plate; and an atomizing nozzle located below the classifier, wherein the atomizing nozzle is configured to eject a stream of liquid toward the classifier surface, the stream of liquid impacting the classifier surface to form droplets having a first droplet size flowing in a first direction and droplets having a second droplet size flowing in a second direction, wherein the first direction is opposite the second direction, and the first droplet size is larger than the second droplet size.

After long-term intensive research and comparative experiments, the inventor finds that festering or pathological changes of hygrophilous plants such as dendrobium officinale, strawberries and orchids are mainly caused by the fact that the particle size of fog drop particles generated by an atomizing device is too large, the too large particles can be deposited on the leaf surfaces of the plants under the action of gravity and cannot evaporate in time, so that the temperature control of the plants is influenced, and the hygrophilous plants cannot be guaranteed to live in the adaptive external environment all the time, so that the festering or pathological changes are easy to occur. Based on this, the present inventors have achieved, in a low-cost manner, particle size sorting of droplets produced by an atomizing device to control the particle size applied to the droplets within a desired range as needed, using the above means.

In a preferred embodiment, the sorter has on its inner surface: a buffer layer consisting of aqueous agar; a moisture-retaining layer coated on the buffer layer and composed of silicone oil. Thus, with such a design, bouncing of droplets due to droplet deposition after a period of operation of the sorter can be avoided in a very simple manner, allowing the sorter to operate without degradation of performance for a long period of time.

In a preferred embodiment, the second droplet has a particle size of less than 40 microns. Therefore, the liquid drops with the particle sizes are particularly suitable for the atomization cultivation of the dendrobium officinale.

In a preferred embodiment, a plurality of holes in the escape plate are arranged around the atomizing nozzle, and the size of the holes is equal to or smaller than the second droplet size. Thereby, droplets having a particle diameter of 40 μm or more are effectively trapped in the inner wall surface or the internal space of the housing 11.

In a preferred embodiment, the method further comprises: the oscillating element is arranged close to the escape plate and drives the escape plate to oscillate back and forth, so that when the oscillating element drives the escape plate to oscillate, the inner space is rapidly increased or reduced due to the oscillation of the escape plate, when the inner space is increased, the liquid drops with the second liquid drop particle size can be sucked to the escape plate, and when the inner space is reduced, the liquid drops are compressed to be ejected from the holes of the escape plate. Thereby, a better atomization effect is achieved in a simple and cost-effective manner.

In a preferred embodiment, the oscillation element is made of a piezoelectric material and is configured to generate rapid oscillation when electrically conducted.

In a preferred embodiment, the oscillating element is substantially annular and is circumferentially arranged around the nozzle.

In a preferred embodiment, the method further comprises: a droplet exporter, wherein said droplet exporter comprises: at least one outlet port; a deflection surface arranged around the outlet opening, wherein the deflection surface extends radially outward with respect to a droplet flow direction within the outlet opening, so that the droplets are deflected radially outward by means of the coanda effect. The more uniform and extensive outward delivery of droplets by the aerosol generating device is achieved in a simple and cost-effective manner, which effectively avoids the deposition of too many droplets at local locations on the foliage of the plant, thereby avoiding the occurrence of ulcerations or lesions.

According to another aspect of the invention, the atomization cultivation method is characterized in that a support is erected at the upper part of a cultivation groove, a planting plate provided with a plurality of planting holes is arranged below the support, the hygrophilous plants are inserted into the planting holes and fixed, and atomized liquid drops are sprayed to the hygrophilous plants at regular time through an atomization generating device, wherein the atomization generating device is the atomization generating device.

Additional features and advantages of the invention will be set forth in part in the description which follows, and in part will be apparent to those having ordinary skill in the art upon examination of the following, or may be learned from the practice of the invention.

Drawings

Embodiments of the invention are described in detail below with reference to the attached drawing figures, wherein:

fig. 1 shows a cross-sectional view of an aerosol generating device according to the invention, wherein the aerosol generating device is in an operating state.

Description of the reference numerals

1. Atomization generating device 11, shell 12, separator 13 and escape plate

131. Hole 14, atomizing nozzle 141, spray outlet

15. Oscillating element 16. droplet discharger

D1. First droplet size D2. second droplet size F1 first Direction

F2. Flow in a second direction L

Detailed Description

Referring now to the drawings, a schematic version of the disclosed aerosol generating device will be described in detail. Although the drawings are provided to present some embodiments of the invention, the drawings are not necessarily to scale of particular embodiments, and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the present disclosure. The position of some components in the drawings can be adjusted according to actual requirements on the premise of not influencing the technical effect. The appearances of the phrase "in the drawings" or similar language in the specification are not necessarily referring to all drawings or examples.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "supported" or "supported" on another element, it can be directly supported or supported on the other element or intervening elements may also be present. Certain directional terms used hereinafter to describe the drawings, such as "transverse," "vertical," "front," "rear," "inner," "outer," "above," "below," and other directional terms, will be understood to have their normal meaning and refer to those directions as normally contemplated by the drawings. Unless otherwise indicated, the directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In fig. 1, an atomization generating device 1 according to the invention is depicted, and here, by way of example, the atomization generating device 1 is used for atomization cultivation of dendrobium officinale, although it will be understood by those skilled in the art that the atomization generating device 1 of the invention is not limited to the above application, which is merely exemplary or illustrative, and that the atomization generating device 1 can also be used for other types of hygrophilous plants.

It is known that dendrobium officinale has good medicinal efficacy and thus becomes a promising commercial crop. Because the dendrobium officinale is favored to grow in warm, humid, semi-yin and semi-yang environments, the dendrobium officinale is better to grow in subtropical deep mountain old forests with annual rainfall more than 1000 mm, air humidity more than 80% and average temperature of 1 month higher than 8 ℃, so in order to realize large-scale planting, the dendrobium officinale is increasingly cultivated by adopting an artificial atomization cultivation method by medicinal growers at present. According to the living characteristics, the root atomization cultivation technology is generally adopted, and the method is characterized in that the dendrobium officinale is fixed on an atomization cultivation bed in a greenhouse for cultivation. Likewise, the tank type aeroponic culture is a common mode in aeroponic culture technology. However, in practice, the modes are found to have a certain degree of ulceration or lesion, so that the popularization and the spread of the atomization cultivation technology are influenced.

After long-term intensive research and comparative experiments, the inventor of the application finds that festering or pathological changes occur to hygrophilic plants such as dendrobium officinale, strawberries and orchids mainly because the particle size of fog droplet particles generated by the atomizing device is too large, the too large particles can be deposited on the leaf surfaces of the plants under the action of gravity and cannot evaporate in time, so that the temperature control of the plants is influenced, and the hygrophilic plants cannot be guaranteed to live in the adaptive external environment all the time, so that the festering or pathological changes easily occur. In order to propose the atomization generator 1 according to the present invention, it will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, an atomization generating device 1 for forming liquid drops with a particle size suitable for atomizing dendrobium officinale is shown, wherein the particle size of the liquid drops is preferably less than 40 micrometers. However, for different hygrophilous plants, the droplet size can be chosen to be appropriate according to the actual growth characteristics. The aerosol generating device 1 comprises a housing 11 which is substantially concave bowl-shaped, where the housing 11 does not have to be strictly hemispherical, but a substantially semi-ellipsoidal shape or a spherical segment is also feasible, wherein a hook for hanging is provided at the bottom vertex of the hemisphere (i.e. at the bowl bottom position of the concave bowl). The housing 11 may be made of plastic or the like.

Further, an escape plate 13 for enclosing an internal space together with the casing 11 is disposed below the concave bowl-shaped casing 11, wherein the escape plate 13 is substantially flat and connected to a lower outlet end of the casing 11 to form the internal space. And a plurality of holes for allowing droplets having a second droplet size D2 described below to escape are provided in the escape plate 13, wherein the holes penetrate the escape plate 13 and communicate with the interior space. Preferably, a plurality of holes in the escape plate 13 are arranged around the atomizing nozzle 14, which is described in detail below, wherein the size of the holes is equal to or smaller than the second droplet size D2.

In this case, a classifier 12 for classifying the particle size of the droplets is arranged in the interior enclosed by the housing 11 and the escape plate 13, wherein the classifier 12 is a part which is substantially convex spherical, wherein the classifier 12 is preferably arranged in the center of the interior enclosed by the housing 11, wherein the classifier 12 is oriented such that the lower part of the convex circular-arc surface faces the opening in the escape plate 13 and the two side parts of the convex circular-arc surface face the inner surface of the housing 11. In this embodiment, the sorter 12 is a separate component from the housing 11, and the two may be attached to each other by means of fasteners or adhesives.

Further, at the intermediate position of the escape plate 13, there is a mounting hole through which the atomizing nozzle 14 is pierced, and the atomizing nozzle 14 projects its ejection port 141 into the internal space by means of the mounting hole, and here the ejection port 141 is located directly below the circular arc convex surface of the classifier 12. The supply end 142 of the atomizing nozzle 14 is exposed to the escape plate 13 and can be connected to a fluid source (not shown in the figures) by means of a pipe. Thus, a fluid (e.g., water or a culture nutrient solution) from a fluid source is supplied under pressure to the discharge port 141 by a high-pressure water pump and is discharged to a lower portion of the circular arc convex surface of the sorter 12.

Preferably, the atomizing nozzle 14 may be connected to an adjusting mechanism, not shown in the drawings, which allows the position of the atomizing nozzle 14 to be adjusted, and the adjusting mechanism may adjust the distance between the ejection port 141 and the apex of the circular-arc convex surface of the classifier 12, thereby allowing the pressurized fluid to be accurately ejected toward the apex of the circular-arc convex surface, which allows the impact of the classifier 12 on the fluid to be maximized, thereby obtaining atomized liquid droplets having a finer particle size.

When the liquid flows L from the ejection ports 141 of the atomizing nozzle 14 are ejected in the direction of the arrow shown in fig. 1, these liquid flows L are broken up into a plurality of droplets having different droplet diameters by colliding against the circular-arc convex surface of the sorter 12 at this time. Due to the law of conservation of momentum and the impact characteristics of the aerosol, droplets having different droplet sizes (and correspondingly different masses) can now be caused to drift in different directions, in particular: the droplets having the larger first droplet size D1 will drift toward the inner wall surface of the housing 11 in a direction shown by the first direction F1, and the droplets having the smaller second droplet size D2 will drift toward the hole of the escape plate 13 in a second direction F2 opposite to the first direction F1. Therefore, the droplets with the required small droplet size D2 can be allowed to float out of the shell 11 through the escape plate 13, and the droplets with the undesirable large droplet size D1 are intercepted in the shell 11, thereby achieving the effect of automatically sorting the droplet sizes. Here, by adjusting the speed of the liquid flow L flowing out of the ejection port 141 of the atomizing nozzle 14, the distance between the ejection port 141 and the vertex of the arc convex surface of the classifier 12, the aperture of the ejection port 141, and other factors, it is possible to realize that the second liquid droplets with the droplet size of less than 40 micrometers are concentrated on the path shown by the arrow F2 along the impacted air flow, and finally escape to the outside of the housing 11 through the holes on the escape plate 13 under the action of the air flow and enable the satisfactory liquid droplets to naturally flow onto the leaf surface of the dendrobium officinale. While the first drops with a drop size greater than 40 microns collect on the path shown by the arrow F1 and are eventually intercepted by the inner surface of the shell 11, the drops accumulating on the inner surface of the shell 11, after coalescence, slide down by gravity along the inner surface of the shell 11 and are returned to the source of fluid or discharged to the environment by means of a recovery device, not shown, connected to the shell 11.

The inventors found that the object of automatically sorting the particle diameters of the liquid droplets can be achieved by the sorter 12 and the housing 11 in combination with the velocity of the liquid flow L flowing out of the ejection port 141 of the atomizing nozzle 14, the distance of the ejection port 141 from the apex of the circular-arc convex surface of the sorter 12, the aperture of the ejection port 141, and the circular-arc convex surface of an appropriate size. As an example, when the aperture of the ejection port 141 is 0.15 mm, the flow velocity of the liquid flow ejected from the ejection port 141 is 35 m/s, the distance between the ejection port 141 and the arc convex spherical surface of the classifier 12 is 5 mm, and the housing 11 having a semicircular arc bowl shape with a radius of 100 to 150 mm and the classifier 12 having an arc convex spherical surface having a semicircular arc bowl shape with a radius of 50 mm are combined, the second droplet D2 having a droplet particle size of less than 40 μm can be obtained. Further, it is also conceivable to adjust the above-mentioned respective sizes if it is desired to obtain droplets of different sizes to meet the growth characteristics of different hygrophilous plants.

In summary, according to the non-limiting aerosol generating apparatus shown in fig. 1, the generated droplets are sorted in size in a very simple and low-cost manner by using the law of conservation of momentum and the impact property of the aerosol, for example, droplets having a size equal to or greater than 40 μm are guided due to their mass and adhere to the inner side wall of the housing 11 so as to be trapped in the inner space of the housing 11, and droplets having a size smaller than 40 μm are discharged from the circular arc convex spherical surface of the sorter 12 out of the housing 11 from the hole 131 of the escape plate 13 in a moving direction of particles different from large particles and escape into the surrounding environmental space, and such droplets having a desired size are very suitable for the aerosol cultivation of economic crops such as dendrobium officinale. Moreover, because the particle size of the liquid drops provided by the atomization generating device disclosed herein is small enough, the liquid drops do not condense into water drops on the surface of the dendrobium officinale or cause plant diseases and insect pests due to overhigh humidity, thereby avoiding various defects in the prior art.

Further, the inventors have found that, although the particle size sorting of the droplets is possible by means of the circular arc convex spherical surface, it is found that, when the pressure of the liquid stream L of the atomizing nozzle is too high or there is a certain inclination in the angle of the atomizing nozzle, a phenomenon occurs in which droplets having a small particle size (less than 40 μm) as required are irregularly moved to some extent, which may adversely affect the generation amount and generation efficiency of the small-particle-size droplets of the atomization generating device to some extent. Although the cause of such irregular movement of the liquid droplet is rather complicated, it is believed that the bouncing of the liquid droplet at the surface of the circular arc convex spherical surface is linked.

Based on this, it is desirable to suppress the bouncing of the liquid droplets on the circular arc convex spherical surface, thereby suppressing such irregular motion. In particular, it is desirable to have a certain adhesion capacity on the surface of the convex spherical surface of the circular arc to attach droplets having an extremely large size (here, for example, greater than 100 μm) and to allow the speed of movement of the droplets leaving the convex spherical surface of the circular arc to be reduced in such a way as to deform and dissipate the kinetic energy of the droplets. Based on this concept, after long-term comparative experiments, the inventor finds that the way of coating the moisturizing layer composed of silicone oil on the surface of the arc convex spherical surface is a simple and feasible solution. On the one hand, the silicone oil has good hydrophobic property and smaller surface tension, so that when being impacted by the liquid flow L, the silicone oil can generate adsorption, deformation and dissipation effects to a certain extent. On the other hand, the silicone oil is colorless, tasteless, nontoxic and nonvolatile liquid, and cannot cause adverse effects on farmers and cultivated plants when being used in a large amount in an atomization cultivation room.

The inventors have also found that, in the case where a moisturizing layer composed of silicone oil is coated on a circular-arc convex spherical surface, there occurs a phenomenon in which, in the case of long-term use, visible water droplets gradually accumulate on the surface of the moisturizing layer and the performance of preventing the liquid droplets from bouncing decreases. It is believed that this is due to the hydrophobic nature of the silicone oil itself, since some of the droplets will, under some momentum impact, enter and accumulate in the moisturizing layer of silicone oil. After the number of liquid drops accumulated in the moisture-retaining layer reaches a certain degree, the deformation capacity, the adhesion capacity and the like of the silicone oil can be deteriorated to a certain degree, and at the moment, the new moisture-retaining layer composed of the silicone oil may need to be replaced in time, which is not favorable for the long-term stable operation of the atomization generating device.

For this purpose, the inventors propose to coat a buffer layer consisting of aqueous agar under a moisture-retaining layer consisting of silicone oil. By superposing the buffer layer consisting of the water-containing agar and the moisture-retaining layer consisting of the silicone oil, when the atomization generating device works for a long time and liquid drops are continuously attached, the accumulated liquid drops can gradually penetrate through the moisture-retaining layer consisting of the silicone oil and enter the buffer layer consisting of the water-containing agar. On the other hand, since the moisture-retaining layer is coated on top of the hydrous agar, it is possible to prevent the hydrous agar from drying.

For the volume ratio of agar to water in the aqueous agar that constitutes the buffer layer, the following factors need to be considered: if the water content is high, the stability of the water-containing agar is poor, and the shape of the water-containing agar is not easy to maintain; on the contrary, if the water content is too low, the water-soluble film is too hard, not only is difficult to prepare, but also is easy to rapidly dehydrate and dry in the long-time sampling process, thereby causing flat shrinkage. After comparative study, it is found that the aqueous agar with the following agar with different volume concentrations (for example, 3%, 6% and 10% respectively) in the buffer layer is prepared, and the phenomenon that the aqueous agar is rapidly hardened and is not easy to prepare is found when the volume concentration of the agar is more than 6%, so that the highest concentration is selected to prepare 6%. And below 3%, it was found that a stable shape could not be maintained in the buffer layer. In other words, the volume solubility of agar in the aqueous agar constituting the buffer layer is preferably selected to be 3 to 6%.

As another improvement for improving the generation efficiency of small-diameter droplets of the atomization generating device, there may be further included an oscillating element 15 shown in fig. 1, where the oscillating element 15 is disposed around the outer periphery of the escape plate in a substantially annular manner, specifically, the oscillating element 15 is disposed closely to the escape plate 13 and drives the escape plate 13 to oscillate back and forth. As known to those skilled in the art, since the inner space of the housing 11 is communicated with the external environment through the plurality of holes on the escape plate 13, when the oscillating element 15 drives the escape plate 13 to oscillate back and forth, the inner space of the housing 11 is rapidly increased or decreased in distance between the inner side surface of the escape plate 13 and the housing 11 due to the oscillation of the escape plate, thereby causing the volume of the inner space to be rapidly increased or decreased. As a result, when the inner space is enlarged, the low pressure generated in the vicinity of the escape plate 13 can suck the droplets having the second droplet size suspended in the inner space to the escape plate 13, and when the inner space is reduced, the droplets having the second droplet size are compressed to be ejected from the plurality of holes of the escape plate. Thus, the purpose of providing the generation efficiency of the small-diameter liquid drops of the atomization generation device is achieved. The oscillating element 15 can be a commercially available piezoelectric material, for example, which, when subjected to electrical conduction, can generate a rapid oscillation that brings the escape plate 13 into corresponding reciprocal oscillation.

In order to achieve a more uniform and extensive outward delivery of droplets from the atomization generating device, as a further improvement, a droplet delivery device 16 is inserted at each hole, as shown in fig. 1, for ejecting droplets having a second droplet size D2 from the inner space outward in the radial direction of the hole, so that the outward delivered droplets have a motion component in the radial direction not only in the vertical direction but also in a part along the periphery of the hole. The liquid drops output in this way can more uniformly spray atomized liquid drops, and excessive liquid drops are prevented from being deposited at local positions on the leaf surfaces of plants, so that fester or lesion is easy to occur.

As a solution, the droplet discharge device described here has at least one discharge opening and deflection surfaces arranged around the discharge opening, wherein the deflection surfaces extend radially outward with respect to the direction of droplet flow in the discharge device, so that the droplets are deflected radially outward by means of the coanda effect known from fluidic physics. Specifically, in accordance with the coanda effect, the stream of droplets follows the flow on the convex deflecting surface rather than having a tendency to break away from the convex deflecting surface and continue to move in the original direction of flow.

It is to be noted that different deflection angles of the deflection surface with respect to the direction of flow of the droplets constitute different states. For example, if the deflection angle is smaller than the minimum deflection angle, a full coanda effect can be observed, which means that substantially all of the stream of droplets will be directed towards the deflection plane and against the deflection plane, so that the stream of droplets flowing towards the deflection plane will all be deflected with respect to its original flow direction. I.e. there is only a deflected drop stream thereafter. If the deflection angle lies between the minimum deflection angle and the maximum deflection angle, a so-called "quasi-stationary" state results in which a part of the droplets will steadily form a deflected air jet depending on the ambient conditions, while another part of the droplets will steadily form an undeflected stream of droplets. If the deflection angle is greater than the maximum deflection angle, the coanda effect cannot be observed, i.e. no deflection of the droplets flowing towards the deflection surface occurs, so that the droplets flowing towards the deflection surface continue their original flow direction.

It should be noted here that the minimum deflection angle and the maximum deflection angle are influenced by different parameters of the deflection surface (for example surface properties, in particular roughness), the flow speed of the drops flowing toward the deflection surface and the like, and can be derived, for example, experimentally. At the same time, the deflection angle can then be coordinated with the flow speed of the liquid drops flowing toward the deflection surface by the shape and arrangement of the deflection surface, so that the deflection angle is preferably between the minimum deflection angle and the maximum deflection angle. The specific deflection angle is preferably between 30 and 45 degrees. As an example of a low cost, the deflection surface may be an at least partially convex or planar blade.

Next, an atomization cultivation method using the atomization generating device of the invention is introduced, specifically, a support is erected on the upper portion of a cultivation groove, wherein a planting plate provided with a plurality of planting holes is arranged below the support, the dendrobium officinale is inserted into the planting holes and fixed, the atomization generating device is hung above the dendrobium officinale by means of a lifting hook on a shell 11 of the atomization generating device, and atomized liquid drops (the particle size of the liquid drops is less than 40 micrometers) are sprayed to the hygrophilous plants at regular time. According to the growth habit of the dendrobium officinale, the atomization spraying frequency of the atomization generating device 1 is 4-5 minutes every 3 minutes in the daytime, and 4-5 minutes every 10 minutes in the nighttime.

It is to be understood that while the specification has been described in terms of various embodiments, it is not intended that each embodiment comprises a separate embodiment, and such descriptions are provided for clarity only and should be taken as a whole by those skilled in the art, and that the embodiments may be combined to form other embodiments as will be apparent to those skilled in the art.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Equivalent alterations, modifications and combinations will occur to those skilled in the art without departing from the spirit and principles of the invention.

Claims (10)

1. An atomization generator for cultivation by atomization, which is used for forming liquid droplets having a particle diameter suitable for atomizing cultivation of humiture plants, comprising:

a housing, the housing being generally concave bowl-shaped;

a classifier disposed within the housing, the classifier being generally convex spherical;

the outlet end of the shell is connected to the shell to form an inner space for accommodating the separator, and a plurality of holes for liquid drops to escape are formed in the outlet plate; and

an atomizing nozzle located below the classifier, wherein the atomizing nozzle is configured to eject a stream of liquid toward the classifier surface that impacts the classifier surface to form droplets having a first droplet size flowing in a first direction and droplets having a second droplet size flowing in a second direction, wherein the first direction is opposite the second direction and the first droplet size is greater than the second droplet size.

2. The aerosol generating device of claim 1, wherein the convex spherical surface of the classifier has:

a buffer layer consisting of aqueous agar;

a moisture-retaining layer coated on the buffer layer and composed of silicone oil.

3. The aerosol generating device of claim 1 or 2, wherein the second droplets have a particle size of less than 40 microns.

4. The aerosol generating device of claim 1 or 2, wherein a plurality of holes in the exit plate are disposed around the atomizing nozzle, and the size of the holes is equal to or smaller than the second droplet size.

5. The aerosol generating device according to any one of claims 1 to 4, further comprising: the oscillating element is arranged close to the escape plate and drives the escape plate to oscillate back and forth, so that when the oscillating element drives the escape plate to oscillate, the inner space is rapidly increased or reduced due to the oscillation of the escape plate, when the inner space is increased, the liquid drops with the second liquid drop particle size can be sucked to the escape plate, and when the inner space is reduced, the liquid drops are compressed to be ejected out of the holes of the escape plate.

6. The aerosol generating device of claim 5, wherein the oscillating element is made of a piezoelectric material and is configured to produce rapid oscillations when electrically conductive.

7. The aerosol generating device of claim 5 or 6, wherein the oscillating member is substantially annular and is disposed around the periphery of the exit plate.

8. The aerosol generating device according to any one of claims 1 to 7, further comprising: a droplet exporter, wherein said droplet exporter comprises:

at least one outlet port;

a deflection surface arranged along the outer circumference of the outlet opening, wherein the deflection surface extends radially outward with respect to the direction of flow of the liquid droplets in the outlet opening, so that the liquid droplets are deflected radially outward by means of the coanda effect.

9. An atomization cultivation method is characterized in that a support is erected at the upper part of a cultivation groove, a field planting plate provided with a plurality of field planting holes is arranged below the support, humidful plants are inserted into the field planting holes to be fixed, atomized liquid drops are sprayed to the humidful plants at regular time through an atomization generating device, and the atomization generating device is the atomization generating device as claimed in any one of claims 1 to 8.

10. The cultivation method by atomization according to claim 9, wherein the frequency of atomization spraying is 4 to 5 minutes every 3 minutes in the daytime and 4 to 5 minutes every 10 minutes in the nighttime.

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