Patent Application
20230404001
The invention relates to a growing apparatus for plants. The invention also relates to a growing method for the plants using the growing apparatus.
Growing apparatuses, and in particular industrial hydroponic methods for growing plants with liquid nutrient solutions instead of soil typically including artificial illumination are well known in the art. Special embodiments of hydroponics are in particular aquaponics, aeroponics and fogponics. In aquaponic methods fish and water animals are kept in the nutrient solution and their excrements fertilize the plants. In an aeroponic method the nutrient solution is sprayed or fogged on the root side. In a fogponics method the fogging is performed by ultrasonic foggers.
EP 3 409 103 A1 proposes to run the conveyor belt up and down in an alternating pattern in the growing apparatus in order to accelerate plant growth.
In the known growing apparatus, the plants grow through holes in the conveyor belt. The large distance between the plants on the planting side and free surfaces thus created facilitate growth of the plants in a longitudinal direction and a transversal direction of the conveyor belt. The artificial illumination of the free surfaces therefore does not help growth.
US 2008/029 5400 A1 discloses a growing apparatus with a flexible conveyor belt assembled from polyester fleece strips, wherein seeds are placed into grooves between the strips and the grooves are closed thereafter when the conveyor belt is put under tension in the feed direction.
WO 2016/023947 A1 discloses an additional growing apparatus with a flexible conveyor belt which is wound on rollers transversal to a feed direction and placed under tension along the conveying path so that the conveyor belt is successively unwound during operations.
WO 2009/067194A1 discloses a growing apparatus with a conveyor belt that runs endless from the planting side to the harvesting side and back.
U.S. Pat. No. 4,972,627 A discloses a growing apparatus with a conveyor belt made from open pore polyurethane.
U.S. Pat. No. 4,118,891 A discloses a growing apparatus with hoses that feed a nutrient medium to the plants.
It is an object of the invention to make the illumination of the plants more efficient.
Improving upon known growing apparatus the object is achieved by a growing apparatus for plants, the growing apparatus including a planting side; a harvesting side; a flexible conveyor belt including cutouts that transports the plants in the cutouts along a conveying path from the planting side to the harvesting side; a nutrition device that feeds a liquid nutrition medium for the plants to a root side of the flexible conveyor belt so that the plants root at the root side and sprout at an illuminated sprout side of the conveyor belt that is arranged opposite to the root side, wherein the flexible conveyor belt is folded into creases at the planting side wherein the creases extend in a direction transversal to the conveying path, wherein the creases are moved from the planting side to the harvesting side and thus straightened and leveled along the conveying path, wherein the cutouts are respectively arranged on ridge lines of the creases.
On the planting side the plants are moved closer together in the longitudinal direction of the conveying path due to the conveyor belt being folded into creases. This reduces a free surface between the plants that is illuminated without utility. Stretching and straightening the creases along the conveying path releases space in the longitudinal direction as required for a growth of the plant. The creases can be formed wave shaped or by creasing the conveyor belt.
Advantageously the conveyor belt in a growing apparatus according to the invention is essentially made from a plastic foil, further advantageously from polypropylene. The conveyor belt can thus be produced economically in any required shape. Performing an aeroponic method, the conveyor belt according to the invention furthermore prevents an uncontrolled transition of nutrient medium from the root side to the sprout side.
A conveyor belt made from polypropylene cleans easily and is resistant to humidity and light. Alternatively, the plastic foil can also be made from polyethylene (PE) polystyrol (PS), polyvinylchloride (PVC) or polycarbonate (PC) or from plural layers of identical or different materials.
Advantageously the conveyor belt is made from lamellas in a growing apparatus according to the invention wherein the lamellas adjoin in a direction transversal to the conveying path. Thus, the conveyor belt can be configured in a modular manner as required.
Advantageously the conveyor belt according to the invention runs endless from the harvesting side back to the planting side in a growing apparatus according to the invention. Thus, the conveyor belt facilitates continuous operations of the growing apparatus. Alternatively, harvested lamellas of a conveyor belt made from lamellas can be removed at the harvesting side and reapplied at the planting side.
Advantageously the plants are attached in the conveyor belt in an open pore foam material, further advantageously polyurethane foam, in a growing apparatus, according to the invention. On the one had side the foam material retains moisture for the plant and on the other hand side allows air to penetrate in order to prevent formation of mildew. Polyurethane foam has proven useful in hydroponics to attach plants.
Advantageously a growing apparatus according to the invention including a horizontally extending conveyor belt running transversal to the conveying path includes capillary hoses extending from the root side into the nutrition device wherein the capillary hoses feed the nutrient medium to the plants. In an aquaponic method, the capillary hoses supply the young plants at least provisionally or in a supplemental manner with the nutrient medium until the plants have formed their own sufficient roots that reach into the nutrient medium.
Alternatively, the growing apparatus according to the invention advantageously includes a fogger that fogs the nutrient medium and a gas conducting system which feeds the fogged nutrient medium to the root side. Further alternatively the root side can be fogged with the nutrient medium. In particular in aeroponic methods with a conveyor belt that extends vertically and transversal to the conveying path the plants are thus provided with the nutrient medium.
Advantageously a growing apparatus according to the invention includes an illumination device for illuminating the sprout side. The artificial illumination facilitates growing the plants independently from sun radiation and weather with defined environmental conditions.
Advantageously a growing apparatus according to the invention includes support elements at the conveyor belt and a drive device with a plurality of drive dogs that run the support elements along the conveying path. The drive with independent drive dogs facilitates a variation of the distance of the support elements and thus a size of the creases along the conveying path.
Advantageously the conveyor belt in the growing apparatus according to the invention includes guide holes at least at one edge along the conveying path, similar to the Remaliner™ punch holes in endless paper and bars formed as support elements between the support holes. The conveyor belt is then configured in a particularly simple and economical manner. The drive dogs can be mandrels or hooks formed at the drive device that are run through the guide holes.
Alternatively, a growing apparatus according to the invention with an advantageously horizontal or downward sloped conveying path can be operated without drive device when suitable support elements, e.g. clamps or bands keep the support elements at the respective desired distance. Alternatively, or in addition to the support elements, a weight or spring force impacting the conveyor belt, an elastic reset force of the conveyor belt itself and/or forces imparted by the plants upon each other can cause a stretching and leveling of the creases.
Advantageously sequential support elements in a drive device of a growing apparatus according to the invention, have a distance from each other that increases along the conveying path from the planting side to the harvesting side. The creases then have a height that decreases along the conveying path.
Advantageously the conveying path in a growing apparatus according to the invention has segments wherein the support elements respectively have a constant distance from each other within respective segments. The drive dogs of the segments can then be attached at orbiting conveyor chains in a particularly simple manner.
Advantageously the conveying path rises and falls in an alternating manner in the growing apparatus according to the invention. This accelerates plant growth.
Improving upon the known method it is proposed according to the invention that the conveyor belt is folded into creases transversal to the conveying path wherein the creases run from the planting side to the harvesting side and are thus stretched and leveled along the conveying path. The method according to the invention is performed in particular by a growing apparatus according to the invention and is characterized by the advantages recited supra.
Advantageously the plants are respectively placed on ridge lines of the creases in a method according to the invention. Placing only one row of plants on each respective crease generates uniform distances between rows which support uniform plant growth.
Advantageously, the plants are arranged offset from each other transversal to the conveying path on sequential creases in a method according to the invention in order to achieve a uniform distribution on the conveyor belt.
Advantageously planting blocks are attached in the conveyor belt and the plants are attached in the planting blocks according to the method according to the invention. The planting blocks simplify starting and handling the seedlings and cleaning the conveyor belt after harvesting.
Advantageously the conveyor belt is continuously moved from the planting side to the harvesting side according to the method according to the invention. The continuous movement without sudden position change closely corresponds to a natural situation in a field.
The invention is subsequently described based on advantageous embodiments with reference to drawing figures, wherein:
The conveyor belt 1 shown in a detail view in
The lamellas 3 and the conveyor belt 1 have a root side 7 and a sprout side 8, and circular cut outs 9 centrally arranged between the support elements 6 and having a diameter 10 of 40 mm, wherein planting blocks 11 can be inserted into the cut outs as illustrated in
The planting blocks 11 illustrated in detail in
In the first growing apparatus 22 according to the invention schematically shown in
The support element 6 of the conveyor belt 1 contact lateral walls of the first growing apparatus 22, sequential support elements 6 are supported by clamps with different lengths against an elastic reset force of the lamellas 3 and a weight force of plants 20 at a respective distance from each other. The walls and the clamps are not illustrated in the drawing figure.
After a growth period of two days respectively three lamellas 3 are removed respectively at the harvesting side 24 and reapplied at the planting side 23 with the starting distance and new seedlings 19. The distance of the remaining lamellas 3 is increased accordingly by replacing the clamps. The plants 20 are harvested from the initially inserted lamellas 3 after 10 days.
The second growing apparatus 31 according to the invention illustrated in
The conveyor belt 32 is configured from the lamellas 3 known from the first growing apparatus 22, wherein the lamellas 3 are connected by the support element 6, described supra. The lamellas and the support elements are not illustrated in the drawing figure.
The conveyor belt 32 feeds plants 34 along a conveying path 35 during a growth phase of 10 days from a planting side 36 to a harvesting side 37 of the growing apparatus 31. Starting from the planting side 36 where the pre sprouted seedlings 38 are applied to the conveyor belt 32 as described supra the conveying path runs in five segments 39 initially vertically upward and thereafter vertically downward to the harvesting side 37 and from the harvesting side 37 below the segments 39 back to the planting side 36. The segments 39 have increasing distances from each other moving from the planting side 36 to the harvesting side 37 in order to avoid a collision of the plants 34.
The illumination device 33 includes six LED panels 40 respectively arranged at the planting side 36 and the harvesting side 37 and between two respectively adjacent segments 39 and illuminates a sprout side 41 of the lamellas and of the conveyor belt 32 in an artificial day/night rhythm.
The planting blocks correspond essentially to the planting blocks 11 of the first growing apparatus 22, however do not have the capillary hose of the first growing apparatus 22.
The nutrition device 47 includes a reservoir with a liquid nutrition medium for the plants 34, an ultrasound fogger for the nutrition medium and conduits for uniform distribution of the fog, on a root side 42 of the conveyor belt 32 that is opposite to the sprout side 41.
The drive device includes an orbiting conveyor chain with drive dogs for the support elements for each of the segments 39, wherein the distances of the drive dogs and the support elements increase from a starting distance of 5 cm at the planting side 36 in increments of 5 cm respectively to the harvesting side 37 to an end distance of 25 cm between the segments 39.
The second growing apparatus 31 can be operated with a conveyor belt 43 that runs transversal to the conveying path 35 in a horizontal or vertical direction.
A third embodiment of the growing apparatus according to the invention essentially corresponds to the first growing apparatus 22 but includes a different drive device. The conveyor belt 43 of the third embodiment of the growing apparatus shown in
This application is a continuation of International patent application PCT/EP2021/076153 filed on Sep. 23, 2021 claiming priority form German application DE 10 2020 125 581.0 filed on Sep. 30, 2020, both of which are incorporated in their entirety by this reference
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/EP21/76153 | Sep 2021 | US |
| Child | 18125324 | US |
