EP4203667A1 - A crop storage container - Google Patents
A crop storage containerInfo
- Publication number
- EP4203667A1 EP4203667A1 EP21786541.9A EP21786541A EP4203667A1 EP 4203667 A1 EP4203667 A1 EP 4203667A1 EP 21786541 A EP21786541 A EP 21786541A EP 4203667 A1 EP4203667 A1 EP 4203667A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- storage
- fluid
- storage module
- air
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000003860 storage Methods 0.000 title claims abstract description 98
- 239000012530 fluid Substances 0.000 claims abstract description 42
- 230000004888 barrier function Effects 0.000 claims abstract description 11
- 230000037361 pathway Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 15
- 238000009423 ventilation Methods 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 8
- QNLZIZAQLLYXTC-UHFFFAOYSA-N 1,2-dimethylnaphthalene Chemical compound C1=CC=CC2=C(C)C(C)=CC=C21 QNLZIZAQLLYXTC-UHFFFAOYSA-N 0.000 description 4
- 235000002595 Solanum tuberosum Nutrition 0.000 description 3
- 244000061456 Solanum tuberosum Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 235000012015 potatoes Nutrition 0.000 description 2
- 239000005973 Carvone Substances 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- 239000005647 Chlorpropham Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 206010061217 Infestation Diseases 0.000 description 1
- 235000006679 Mentha X verticillata Nutrition 0.000 description 1
- 235000002899 Mentha suaveolens Nutrition 0.000 description 1
- 235000001636 Mentha x rotundifolia Nutrition 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000000843 anti-fungal effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- CWJSHJJYOPWUGX-UHFFFAOYSA-N chlorpropham Chemical compound CC(C)OC(=O)NC1=CC=CC(Cl)=C1 CWJSHJJYOPWUGX-UHFFFAOYSA-N 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F25/00—Storing agricultural or horticultural produce; Hanging-up harvested fruit
- A01F25/14—Containers specially adapted for storing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/066—Movable chambers, e.g. collapsible, demountable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
- F26B9/063—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers for drying granular material in bulk, e.g. grain bins or silos with false floor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/06—Grains, e.g. cereals, wheat, rice, corn
Definitions
- the present invention relates to a storage container for retaining a crop, allowing fluid flow across the crop.
- the container can be linked to like containers allowing the fluid to flow from one container to a fluidly linked container.
- the crop needs to be kept under controlled conditions, possibly to dry off excess water and then to maximise the quality of the crop over the storage period. For example, conditions need to be controlled to prevent the crop from drying out more than required, but also to reduce the occurrence of fungal or other microbial growth.
- the present invention seeks to address the above problem by, in effect, dividing a larger storage volume into a plurality of smaller unit volumes in which air flow can be more easily controlled.
- a storage module for crops comprising a storage volume having a floor on which a crop rests; an inlet chamber separated from the storage volume by a fluid barrier, the barrier including fluid inlets providing controlled fluid flow between the storage volume and the inlet chamber; an outlet chamber separated from the storage volume by a fluid barrier, the barrier including fluid outlets providing controlled fluid flow between the storage volume and the outlet chamber.
- the size of a fluid inlet can be varied to control the flow of fluid.
- the size of a fluid outlet can be varied to control the flow of fluid.
- the location of a fluid inlet can be changed to control flow of fluid.
- the location of a fluid outlet can be changed to control flow of fluid.
- the storage module is preferably cuboidal, including rectangular cuboidal to facilitate location of storage units in a space-efficient manner and with the inlets/outlets on adjacent storage modules in close proximity to each other to facilitate formation of a continuous fluid pathway between storage modules through linkage of fluid inlet and outlet chambers.
- At least one inlet and/or outlet chamber extends along one edge of a module allowing storage modules to be linked at corner edges.
- an inlet or an outlet chamber is located beneath a storage volume and where the storage module is cuboidal extends across the lower in-use face of the storage module.
- an inlet or an outlet chamber is located above a storage volume and where the storage module is cuboidal extends across the upper in-use face of the storage module.
- the storage module preferably includes a heat-exchanger to remove or add thermal energy into the fluid flow.
- Figures la, lb and lc illustrate ventilation ports in a container
- Figure 2 illustrates passive air flow through a container
- Figures 3a, 3b further illustrates passive air flow through a container to cool /heat respectively;
- Figure 4 illustrates mechanical air flow through a container
- Figure 5 illustrates passive air flow through a stacked plurality of containers
- Figure 6 illustrates forced air flow through a plurality of containers
- Figures 7a, 7b illustrate embodiments of a stacked plurality of containers, each including a heat exchanger with the embodiment of Figure 7a provided with cooling and that of Figure 7b with heating;
- Figures 8a, 8b illustrate an array of containers having external common mechanical heating /cooling system and integrated ventilation ports
- Figures 9a, 9b compare the current invention (Figure 9a) with a prior art arrangement ( Figure 9b) of storage units.
- the present invention is intended primarily for the agricultural sector in relation to crop storage.
- Modern farming and food distribution systems now often require that when a crop has been harvested, it is then stored for prolonged periods, possibly over months, before being sent to a retail distribution outlet. It is imperative therefore that the conditions under which the crop is stored minimise the degradation of the crop, including preventing microbial growth, and also controlling any growth or development of the crop.
- the present invention addresses this in providing a modular unit which can be assembled with other units to provide a working volume whose overall size and configuration can be changed to suit the particular needs at the time.
- the invention can provide a standalone facility, having its own in-built ventilation control system, for example on a farm or also on transport such as a lorry or ship, or be incorporated into an already existing structure and ventilation system, enabling the structural volume to be effectively divided up into smaller, fluidly independent volumes.
- Figure la illustrates a first embodiment of a storage box 10 in which product is stored on the floor of a product volume 11.
- the embodiment of Figure la is provided with corner ventilation ports 12a, 12b and 13a and 13b.
- the ports 12a, 12b are designated as inlet ports 13a, 13b as outlet ports.
- the inlets and outlets are diagonally opposite corners.
- An inlet or an outlet port can be provided with a closure to at least partially close the port when not required or to divert air flow in a desired path.
- the storage box 20 has a product volume or container 21 on which product is stored and side ventilation ports 22, 23 of which the port 22 is designated as an inlet port and the port 23 an outlet port.
- the product volume 31 is surmounted by a ventilation port 32 and is above a second ventilation port 33. Either of ports 32, 33 can serve as the ventilation inlet port.
- the storage box can either be used by itself to store crop, or it can be combined with other storage boxes in such a way that the inlet and outlet ports of individual boxes combine together to form a flow path, which takes in each box, and is suitable for the crop being stored.
- Ventilation air can be provided by a built-in distribution system internal to one or more boxes or can be externally provided to the flow path from a separate distribution unit such as an HVAC or other air handling unit such as a mechanical fan or a compressed air source, a cooling or heating system including a heat pump or dehumidifier.
- the air supply can also be a passive air supply. Such a passive air supply can cause airflow through a box by convection currents created by pressure differences, typically arising from temperature differences.
- a storage box can be provided in an overall shape to suit the use and intended location.
- a convenient shape for a box is cuboidal including rectangular cuboidal. This allows efficient use of space when locating boxes adjacent other boxes in rows and/or stacks.
- the air supply itself can be from a bottled source or taken directly from the atmosphere. Additionally or alternatively, controlled gases or fluidised chemicals can be added to the flow, for example chlorine dioxide or chlorpropham can be added into the air supply where the stored crop is the potato. Other chemicals which can be used are ethylene gas, dimethylnaphthalene (DMN), Mint Oil (including R-carvone) and others which are commonly used in sprout prevention and control. Controlled atmospheres such as high CO? or N2 / low O2 environments also aids this, and also with other crops and fruits, slowing ripening or preventing their decay.
- controlled gases or fluidised chemicals can be added to the flow, for example chlorine dioxide or chlorpropham can be added into the air supply where the stored crop is the potato.
- Other chemicals which can be used are ethylene gas, dimethylnaphthalene (DMN), Mint Oil (including R-carvone) and others which are commonly used in sprout prevention and control. Controlled atmospheres such as high CO? or N2 / low O2 environments also aids
- a box of dimensions 300 x 300 x 200mm 3 can be used, whilst for potatoes, a box of 3000 x 3000 x 2000mm 3 can be contemplated.
- the walls of a box are made of materials known in the art and manufactured using conventional methodology.
- the air supply enters a box at an inlet point.
- the air then flows into the interior volume of the box by means of an opening, flap, floor or wall grating or the like to engage the crop.
- the air then exits the interior volume via an outlet.
- the air is either vented to atmosphere or can flow to the inlet of a neighbouring box, or is recirculated, for example via a heat exchanger, dehumidifier, chemical purifier and back into the box via the box's inlet.
- FIG 2 this illustrates passively caused air flow through a storage box 40 in which movement of the air, shown by arrows A, through the box 40 is not brought about by mechanical means, but air movement is by means of convection forces.
- This embodiment is suitable for tubers such as potatoes, which because they are living and breathing creating a heat output driving the air current roughly >50w/Ton.
- Air enters a box 40 via the inlet chamber 41. Where the flow is based on differences in temperature then the inlet is preferably located towards the base of the box 40. The air then flows into the product volume 42 of the box 40 and flows in the direction indicated by the arrow. The air exits the product volume 42 and enters the exhaust chamber 43.
- the outlet from the exhaust chamber 43 preferably located towards the upper region of the box 40, instead of venting to atmosphere, the exhaust air can pass into a recirculation chamber 44.
- the recirculation chamber 44 preferably includes a heat exchanger which removes heat energy from the exhaust air. The cooled air can then flow directly into the inlet chamber 41 and back into the product volume 42.
- FIG. 3a which illustrates a self-contained box 50 operating by heat difference to drive air flow
- the cooled air from a heat exchanger 51 falls through the cold air inlet channel 52.
- Cold air then flows in the lower conduit 53 beneath the product volume 54.
- the cooled air enters the product volume 54 via air inlets 55.
- the now warmed air flows upwards and out of the return vent 56 and into the return conduit 57.
- the air in the return conduit 57 is cooled by passing through the heat-exchanger 51, before flowing back into the cold air inlet channel 52.
- An inlet chamber or conduit typically extends across a face of the product volume to ensure airflow can reach all parts of the product volume.
- the size of an air inlet or an air outlet can be changed to provide the airflow required.
- the location of an air inlet or an air outlet can be moved: again to provide the required flow characteristics through a storage volume.
- FIG. 3b illustrates a storage box 60, operating similarly to the box 50 in driving air flow by temperature difference, but provides instead for a warmed air feed.
- a heat exchanger 61 located in the base of the box 60 heats air which flows up the inlet channel 62 and along the top conduit 63.
- the warmed air enters the product volume 64 through the chamber inlet 65 flowing thence through the product in the volume 64, losing heat to the product as it does so.
- the cooled air exits the volume 64 by the outlets 66 and the lower conduit 67.
- the cooled air in the conduit 67 is then reheated by the heat exchanger 61 before passing again into the inlet channel 62.
- the mechanical means can be incorporated into one or both of heat exchangers 71 or 72 which respectively cool circulating air or heat circulating air within the storage box 70 in the conduits 73, 74, 75.
- one or both of the mechanical means and the heat exchangers can be housed in a separate unit fluidly attachable to a storage box.
- the separate unit can be part of a larger structure in which the product boxes are utilised. It can be envisaged therefore that a building be provided with one or more inbuilt heat exchangers and/or mechanical means to drive air flow, to which storage boxes as described herein can be fluidly attached.
- the array of storage boxes illustrated in Figure 5 has three storage boxes 80a to 80c in a stacked arrangement.
- the boxes 80a to 80c are arranged such that the inlet ports 22 of the boxes 80a to 80c cooperate to form a fluid path and similarly the outlet ports 23.
- Cooled air from the recirculation chamber 81 can therefore reach any of the boxes 80a to 80c and similarly, warmed air exiting each of the boxes 80a to 80c combines together into a single air flow to return to the recirculation chamber 81 for cooling.
- the boxes which are the subject of the present invention enable, in effect, a storage volume to be enlarged or reduced to suit a particular crop being stored.
- individual storage boxes can be assembled together to accommodate the crop.
- individual boxes can be removed from the assembly, and reused for another crop being harvested.
- the stacking together can also offer, where required, a lower heat loss than three individual boxes due to the smaller external surface area of the assembled boxes compared with the same number of boxes individually stored.
- FIG. 6 The arrangement of boxes 90a to 90c in Figure 6 is similar to that shown in Figure 5.
- two of the boxes 90b, 90c are of the type shown in Figure lb
- the box 90a is of the type shown in Figure 4 and includes mechanical drives 91, 92 to drive air through the arrangement.
- the drives can be incorporated into, or coupled with, heat exchangers which act to remove /add heat to the air being circulated.
- the drives /heat exchangers can be incorporated into the building in which the boxes are housed.
- a storage box having integrated drives/heat exchangers can be permanently installed within a structure, with removable storage boxes then being added to the permanently installed box as and when required.
- Figures 7a, 7b show arrangements of storage boxes in which two stacks of storage boxes are arranged adjacent each other and ventilation /heat exchange is provided by one or more units, to both stacks.
- the arrangements of Figures 7a, 7b are representational as to how boxes can be combined. Arrangements can be designed for any number of boxes stacked and only limited by the method of stacking or height of the store.
- an array of two stacks 100, 101 each comprising three storage boxes 100a to 100c, 101a to 101c are each connected to a mechanical cooling unit 102.
- the two stacks are provided such that each defines and is served by a separate fluid flow path, beginning and ending with the cooling unit 102.
- the two stacks are separated by a dividing wall 103, across which air does not flow. This facilitates partial disassembly of the array to remove, for example, boxes 100a to 100c but leaving the other stack in place.
- Cooled air produced by the mechanical cooling unit 102, is discharged into the cooling duct 104 in the direction of the arrow A. Due to its higher density, the cooled air moves in a generally downward direction. As the cooled air descends, a portion of it diverts beneath each storage box 100a - c, 101a - c and enters a box by means of air inlets 105. As the air encounters product in the product volume 106, the air warms and rises to the top of the storage boxes 100a - c, 101a - c before exiting the box.
- the warmed air then rises to the top of the stacks 100, 101 by means of the fluid path formed by the outlets of the boxes 100a - c, 101a - c, to return to the mechanical cooling unit where the air is cooled and then again enters the cooling duct 104.
- Figure 7b shows a similar arrangement except that the mechanical cooling unit 102 is absent and instead a mechanical heating unit 107 is included towards the base, beneath the stacks 110, 111.
- the heating unit 107 heats the air which then rises up the duct 114, in the direction shown by the arrow B, before entering the inlets at the top of the boxes 110a - c, Illa - c, thence heating the product, before exiting the boxes 110a - c, Illa - c via the outlets 115.
- Figure 8a illustrates an array comprising horizontal rows 120, 121, 122 of boxes 120a - e, 121a - e and 122a - e.
- the boxes in the rows 120, 121, 122 are of the type of box illustrated in Figure 7a and having air inlets 125 in their base regions.
- Each horizontal row 120, 121, 122 is served by an individual duct 123a, 123b, 123c which runs continuously under each of the boxes in an individual row. Unlike the arrangements in Figures 7 therefore, air can flow horizontally across a nominal stack of vertically neighbouring boxes such as that formed by the boxes 120a, 121a, 122a.
- a mechanical cooling unit 126 acts to cool air prior to the air entering a product volume.
- the cooled air therefore leaving the mechanical cooling unit 126 flows downwardly in the duct 127. Portions of the cooled air can flow into the ducts 123a, 123b, 123c from where the air enters a box located over the particular duct through an inlet 125. On leaving the box the air has entered, the air can either continue an upward journey through a box in a higher row or move horizontally along the duct it is now in, reaching the further duct 128 from which it flows back to the mechanical cooling unit 126.
- Figures 9a and 9b illustrate, respectively, an embodiment of the current invention and compares this embodiment with a prior art storage arrangement.
- 4 columns of storage units, with a ventilation unit atop each column require, in effect an area of floorspace equal to the sum overall of the floorspace of each column.
- the loading and unloading of product is provided by a single unloading/loading machine.
- This arrangement compares favourably with that of the prior art arrangement shown in Figure 9b.
- the arrangement of Figure 9b also includes four columns of storage units, served by a central ventilation unit. However, the storage units are separated spatially, horizontally, to allow the unloading/loading machine access. The overall floor space utilized is therefore greater.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Microbiology (AREA)
- Storage Of Harvested Produce (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB2013280.9A GB202013280D0 (en) | 2020-08-25 | 2020-08-25 | A crop storage container |
PCT/GB2021/052204 WO2022043683A1 (en) | 2020-08-25 | 2021-08-25 | A crop storage container |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4203667A1 true EP4203667A1 (en) | 2023-07-05 |
Family
ID=72660741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21786541.9A Withdrawn EP4203667A1 (en) | 2020-08-25 | 2021-08-25 | A crop storage container |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4203667A1 (en) |
GB (1) | GB202013280D0 (en) |
WO (1) | WO2022043683A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5054291A (en) * | 1990-07-25 | 1991-10-08 | Davis Thomas L | Multi-bay system for the forced air postharvest conditioning of agricultural crops |
US5187945A (en) * | 1991-05-13 | 1993-02-23 | Reefco Manufacturing Corporation | Refrigerated container |
US6688018B2 (en) * | 1997-04-02 | 2004-02-10 | Paul B. Soucy | Apparatus for bulk drying of sliced and granular materials |
US20110252663A1 (en) * | 2010-04-19 | 2011-10-20 | Global Seed Dryer Solutions, LLC | Agricultural material dryer |
WO2013082082A1 (en) * | 2011-11-28 | 2013-06-06 | Syngenta Participations Ag | Scalable pilot dryer |
-
2020
- 2020-08-25 GB GBGB2013280.9A patent/GB202013280D0/en not_active Ceased
-
2021
- 2021-08-25 WO PCT/GB2021/052204 patent/WO2022043683A1/en unknown
- 2021-08-25 EP EP21786541.9A patent/EP4203667A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2022043683A1 (en) | 2022-03-03 |
GB202013280D0 (en) | 2020-10-07 |
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