US20230080132A1 - Box for preservation under vacuum and vacuum-application system comprising such a box - Google Patents
Box for preservation under vacuum and vacuum-application system comprising such a box Download PDFInfo
- Publication number
- US20230080132A1 US20230080132A1 US17/798,311 US202117798311A US2023080132A1 US 20230080132 A1 US20230080132 A1 US 20230080132A1 US 202117798311 A US202117798311 A US 202117798311A US 2023080132 A1 US2023080132 A1 US 2023080132A1
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- US
- United States
- Prior art keywords
- container
- box
- cavity
- lid
- inner volume
- 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.)
- Abandoned
Links
- 238000004321 preservation Methods 0.000 title abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 235000013305 food Nutrition 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 239000005416 organic matter Substances 0.000 claims description 7
- 239000005388 borosilicate glass Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 33
- 239000011368 organic material Substances 0.000 description 15
- 239000007787 solid Substances 0.000 description 4
- VKLKXFOZNHEBSW-UHFFFAOYSA-N 5-[[3-[(4-morpholin-4-ylbenzoyl)amino]phenyl]methoxy]pyridine-3-carboxamide Chemical compound O1CCN(CC1)C1=CC=C(C(=O)NC=2C=C(COC=3C=NC=C(C(=O)N)C=3)C=CC=2)C=C1 VKLKXFOZNHEBSW-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009920 food preservation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000021268 hot food Nutrition 0.000 description 1
- 238000005511 kinetic theory Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
- B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
- B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
- B65D81/2015—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum in an at least partially rigid container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
- B65D81/3802—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a barrel or vat
- B65D81/3806—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a barrel or vat formed with double walls, i.e. hollow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
- B65D81/3813—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container
- B65D81/3818—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container formed with double walls, i.e. hollow
Definitions
- the invention relates to a vacuum storage box and to a vacuum storage system comprising such box.
- vacuum technology is increasingly being used for storing organic materials, in particular food.
- This vacuum technology prevents the oxidation of organic materials by reducing the amount of oxygen in contact thereof.
- the vacuum method best preserves the organoleptic properties and vitamins of food.
- WO-2018 189 351-A1 It is known from WO-2018 189 351-A1 how to use a box with a container and a lid, the container comprising a tube, formed in the walls of the container, which allows vacuum to be created inside the container when the container is placed on a base comprising a vacuum pump.
- the tube is connected to a system of ducts and valves built-in into the lid, which, overall, provides satisfaction.
- WO-2018 189 351-A1 is however silent about food preservation when a particular temperature, either cold or hot, is required.
- DE-296 17 720-U1 describes, e.g. an insulating box with a double-wall forming a vacuum cavity, for keeping food warm. DE-296 17 720-U1 does not discuss food preservation.
- the invention more particularly addresses a way to remedy such problems, by proposing a vacuum storage box which is less sensitive to temperature variations.
- the present invention relates to a vacuum storage box, comprising a container and a lid for closing the container.
- the container comprises a body with an inner wall and an outer wall, the inner wall delimiting an inner volume of the container, wherein the inner volume is open upwards when the container is placed on a horizontal surface.
- the inner and outer walls are connected to each other at an edge and define therebetween a first cavity, the edge having a closed contour.
- the lid comprises a body with a boundary having a closed contour and intended to press tightly against the edge of the container when the lid is assembled with the container in a closed configuration of the box.
- the first cavity leads to the outer environment through at least one opening, each opening comprising a first non-return valve, which lets the gas flow from the first cavity to the outside and prevents the gas from flowing from the outside towards the first cavity, while the first cavity leads to the inner volume through at least one passage.
- the container is thermally insulating when the vacuum is created inside the first cavity.
- heat exchange is limited between the food housed inside the inner volume of the container and the outer environment, which increases the shelf life for food sensitive to temperature.
- the cold is maintained longer; in contrast, when hot food is put in the vacuum storage box, the food remains hot for several hours and can be eaten without the need to be heated up, e.g. using an oven.
- such a vacuum storage box may include one or more of the following characteristics taken according to any technically permissible combination:
- the present invention relates to a system for storing under vacuum, a quantity of organic material, in particular a food, comprising a box as described above and a base for receiving the box.
- the base comprises a vacuum pump connected to a duct, the duct being intended to be connected to the opening of the container when the box is received by the base.
- the base comprises a pattern in relief for centering the duct of the base with respect to one of the openings of the container of the box.
- FIG. 1 is a section of a vacuum system according to a first embodiment of the invention, comprising a vacuum storage box according to a first embodiment of the invention;
- FIG. 2 is a larger scale view of the detail II shown in FIG. 1 ,
- FIG. 3 is a larger scale view of the detail III shown in FIG. 1 ,
- FIG. 4 is a perspective view of a vacuum storage box according to a second embodiment of the invention.
- FIG. 5 is a perspective and sectional view of a vacuum storage box according to a third embodiment of the invention.
- FIG. 6 is a perspective and sectional view of a vacuum storage box according to a fourth embodiment of the invention.
- FIG. 7 is a perspective and sectional view of a vacuum storage box according to a fifth embodiment of the invention.
- a vacuum system 2 is shown in FIG. 1 .
- the system 2 comprises a base 20 and a box 40 , the box 40 comprising a container 60 and a lid 80 .
- the box 40 is intended to receive a quantity of organic material, in particular food 42 , which may be liquid and/or solid.
- the container 60 and the lid 80 are made of a material suitable for contact with food, non-porous so as to prevent the diffusion of gases through materials, and sufficiently rigid so as not be deformed when a partial vacuum is created in the box 40 , as explained hereafter in the present description.
- the container 60 and the lid 80 are e.g. made of metal, e.g. steel, in particular stainless steel, or of a vitreous material, e.g. a simple glass, such as a soda-lime glass, or a glass which resists thermal shocks, such as borosilicate glass, or even of plastic or elastomer.
- the food 42 is not part of the invention but contributes to illustrate the principle thereof.
- the food 42 comprises both a solid and a liquid portion.
- the base 20 is shown on a surface S which is assumed to be horizontal, which corresponds to normal use of the system 2 .
- the base 20 comprises an upper surface 22 , which is horizontal in the figures and on which the container 60 is placed.
- the base 20 comprises a centering pattern in relief 24 , which is provided on the upper surface 22 and which mates with a matching pattern in relief 63 of the container 60 , in order to provide a correct positioning of the container 60 with respect to base 20 when a bottom 65 of the container 60 is placed on the upper surface 22 of the base 20 .
- the centering pattern in relief 24 is provided and protrudes from the surface 22 and has a truncated cone shape centered on an axis A 24 , which is vertical here, while the matching pattern in relief 63 of the container 60 is arranged as a recess on the bottom 65 of that container.
- the base 20 further comprises a pump 26 and a duct 28 .
- the duct 28 consists of a first end 282 , which is connected to the pump 26 , and a second end 284 , opposite the first end, which leads to the upper surface 22 . It is understood that the pump 26 is configured for aspirating a quantity of air through the duct 28 and to discharge said quantity of air toward the outside environment.
- the duct 28 leads from the surface 22 to the center of the pattern in relief 24 , i.e. the second end 284 is aligned with the axis A 24 .
- the container 60 comprises a body 62 with an inner wall 64 and an outer wall 66 .
- the inner 64 and outer 66 walls are connected to each other at an edge 68 , which has a closed contour.
- the container 60 has an overall revolution form about an axis A 60 which is merged with the axis A 24 when the container 60 is placed on the base 20 , with the edge 68 having a truncated cone shape centered on the axis A 60 and flared upwards.
- the axis A 60 is thus vertical when the bottom 65 of the box 60 is placed on a horizontal surface.
- the bottom 65 is part of the outer wall 66 , which further comprises a peripheral wall 67 .
- the inner wall 64 comprises a bottom 642 and a side wall 644 , which delimit an inner volume V 64 of the container 60 , while the inner wall 64 and the outer wall 66 define therebetween, a first cavity V 66 , which is closed, i.e. isolated from the outside by the walls 64 and 66 and by the edge 68 .
- the container 60 is placed on the upper surface 22 of the base, which is horizontal, and the inner volume V 64 is open upwards.
- the first cavity V 66 leads to the outer environment through an opening 70 equipped with a non-return valve 72 , as shown schematically on a larger scale in FIG. 3 .
- the opening 70 is aligned with the axis A 60 , so that when the container 60 is placed on the base 20 , the opening 70 is aligned with the second end 284 of the duct 28 through the upper surface 22 .
- the non-return valve 72 has a built-in plugging component 722 , which has here the shape of a ball and which is loaded by an elastic component 724 , shown here as a spring.
- the non-return valve 72 of each opening 70 allows the gas to flow from the cavity V 66 toward the outside and prevents the gas from flowing from the outside toward the cavity V 66 .
- the second end 284 of the duct 28 is equipped with a nipple—which is not shown—which fluidically connects the duct 28 with the opening 70 .
- the cavity V 66 leads to the inner volume V 64 through a passage 74 .
- the passage 74 is provided through the edge 68 near a junction corner 682 between the edge 68 and the inner wall 64 .
- the air is not prevented from flowing through the passage 74 when the lid 80 is fitted onto the container 60 in a closed configuration of the box 40 , as shown in FIGS. 1 and 2 .
- a flap 76 is provided in the passage 74 which leads directly to the inner volume V 64 .
- the valve 76 allows the gas to flow from the inner volume V 64 toward the cavity V 66 but is configured so as to prevent the organic materials 42 contained in the container 60 from penetrating into the cavity V 66 . More particularly, when the organic materials 42 comprise a liquid portion, the valve 76 prevents the liquid from flowing from the inner volume V 64 toward the cavity V 66 .
- valve 76 is also the “non-return” type, with a similar structure to the valve 72 .
- a non-return type valve 76 is shown schematically and on a larger scale in FIG. 2 , the valve 76 comprising a plugging component 762 , shown in the form of a ball, loaded by an elastic component 764 , shown here by a spring.
- the non-return valve is in free-flow from the inner volume V 64 toward the cavity V 66 and no-flow in the opposite direction.
- valves 76 Other types are also conceivable.
- the container 60 has a maximum level graduation 78 , which is shown as a dotted-dashed line in FIG. 1 .
- the graduation 78 indicates to a user a level not to exceed when a user fills the container 60 with a quantity of organic materials.
- the graduation 78 is thus a horizontal line when the container 60 is placed on a horizontal surface.
- the graduation 78 is preferentially indicated on the inner wall 64 of the container 60 .
- the graduation 78 is printed on the surface of the inner wall 64 , or is embossed during the fabrication of the container 60 .
- the graduation 78 can be integrated into a mold for manufacturing the container 60 .
- a distance d 78 between the bottom 642 of the inner wall 64 and the graduation 78 , measured parallel to the axis A 60 is equal to 75% of a height h 64 between the bottom 642 of the inner wall 64 and the junction corner 682 of the edge 68 with the inner wall 64 .
- the value of the ratio d 78 /h 64 can vary between 0.5 and 0.95, depending on the height of the container 60 .
- Each passage 74 is located, at height, between the graduation 78 and the lid 80 assembled with the container 60 in the closed configuration of the box 40 , so as to prevent the liquid to flow from the inner volume V 64 toward the first cavity V 66 .
- the lid 80 comprises a body 82 with a boundary 84 .
- the boundary 84 has a closed contour.
- the lid 80 is configured for pressing tight against the edge 68 of the container 60 .
- the boundary 84 has a truncated cone shape, with an angle at the vertex which is the identical to the angle of the edge 68 .
- the junction between the lid 80 and the container 60 is considered to be leaktight, i.e. no liquid or gas can pass between the edge 68 and the boundary 84 .
- FIGS. 1 and 2 show a cross-sectional representation of the box 40 , with the edge 68 facing the boundary 84 being both represented by straight and parallel segments.
- a sealing component 86 is fitted therebetween the boundary 84 of the lid 80 and the edge 68 of the container 60 .
- the sealing component 86 is housed here inside a groove 840 provided in the boundary 84 of the lid 80 .
- the sealing component 86 can be housed on the edge 68 of the container 60 , in particular in a groove in the edge 68 .
- the sealing component 86 is advantageously removable, so as to facilitate the cleaning of the lid 80 and of the sealing component 86 , and to make it possible to replace the sealing component 86 when same is damaged.
- the sealing compound 86 is here an O-ring with a rectangular section, with two opposite sides 862 arranged parallel to the boundary 84 of the lid 80 , and two other opposite sides 864 arranged orthogonal to the boundary 84 .
- a width L 86 of the sealing compound 86 is defined as a distance between the two opposite sides 864 , measured parallel to the boundary 84 .
- a thickness E 86 of the sealing component 86 is defined as a distance between the two opposite sides 864 of the sealing component 86 measured orthogonal to the boundary 84 of the lid 80 .
- the sealing compound 86 is preferentially made of a material suitable for contact with food and resistant to the flowing of gases.
- the sealing component 86 is preferentially made of silicone, preferentially manufactured by pressure molding, so as to reduce the porosity of the material.
- the sealing component 86 has the largest possible ratio L 86 /E 86 between the width L 86 thereof divided by the thickness E 86 thereof.
- the ratio between the width L 86 divided by the thickness E 86 is greater than 5, preferentially greater than 8, preferentially greater than 12.
- the ratio L 86 /E 86 is kept smaller than or equal to 50, preferentially to 25.
- the lid 80 comprises an inner wall 88 and an outer wall 90 , opposite the inner wall 88 .
- the lid 80 has a double-skin.
- the inner wall 88 faces the inner volume V 64 of the container 60 .
- the inner wall 88 and outer wall 90 are joined to each other by the boundary 84 and define therebetween a cavity V 80 .
- the cavity V 80 is closed, and a partial vacuum is created inside the cavity V 80 so that the lid 80 is thermally insulating.
- the temperature of a gas and the thermal conductivity of a gas depend on the collisions between the molecules of said gas.
- the pressure of the gas decreases and a partial vacuum is created, the probability of collision between the gas molecules decreases, and so does the thermal conductivity.
- a partial vacuum is created in a closed volume, such as the cavity V 80 , said volume becomes thermally insulating.
- the partial vacuum in the cavity V 80 is created at the factory when the lid 80 is manufactured, unlike the partial vacuum created by a user in the cavity V 66 or in the inner volume V 64 , as explained herein.
- the lid 80 further comprises a valve 92 which connects the outer environment to the inner volume V 64 in the closed configuration of the box 40 .
- the valve 92 is configured for being handled by a user at the opening of the box 40 ; from the outside of the closed box, so as to allow air to flow from the outside environment toward the inner volume V 64 of the box 40 when the box 40 is in a closed configuration, i.e. so as to re-pressurize the inner volume V 64 . Without the intervention of a user, the valve 92 does not allow air to flow through.
- a user places the container 60 on the upper surface 22 of the base 20 , so that the pattern in relief 24 corresponds with a matching pattern in relief provided in the outer wall 66 of the container 60 .
- the duct 28 of the base is thus aligned with the opening 70 of the container 60 .
- the pattern in relief 24 is a centering pattern in relief of the duct 28 of the base with respect to one of the openings 70 of the container 60 .
- the user then places a quantity of organic matter 42 which they wish to preserve in the inner volume V 64 of the container 60 , taking care not to exceed the graduation 78 , and then close the container 60 with the lid 80 .
- the user can also fill the container 60 and assemble the lid 80 with the container 60 before installing the container 60 on the base 20 .
- the vacuum system 2 is then in the configuration shown in FIG. 1 , with the boundary 84 of the lid 80 pressing tight between the edge 68 of the container 60 , the sealing component 86 being fitted in-between the boundary 84 and the edge 68 .
- the base 20 comprises a sensor 30 configured for detecting the presence of the container 60 on the base and/or automatically controls the start of the pump 26 , as considered in WO-2018/189351-A1.
- the pump 26 thus draws the gas contained in the cavity V 66 via the duct 28 which is fluidically connected to the cavity, through the non-return valve 72 which allows free-flow in this direction.
- the gas contained within the inner volume V 64 is sucked up into the cavity V 66 , via the passage 74 and through the non-return valve 76 which allows free-flow in this direction, due to the partial vacuum created inside the cavity.
- the air coming from the inner volume V 64 is discharged outwards through the non-return valve 72 , the duct 28 , and the pump 26 .
- a partial vacuum is created both inside the cavity V 66 and inside the inner volume V 64 .
- the pump 26 stops and the user can remove the box 40 from the base 20 . Due to the non-return valve 72 , the outside air cannot flow from the outside toward the cavity V 66 .
- the partial vacuum is maintained in the cavity V 66 and in the inner volume V 64 , and the partial vacuum inside the inner volume V 64 holds the lid 80 in place over the container 60 , by compressing the seal 86 which efficiently isolates the inner volume V 64 from the outside environment.
- the cavity V 66 Due to the partial vacuum in the cavity V 66 , the cavity V 66 is thermally insulating, i.e. heat transfers between the inner volume V 64 and the outside environment are reduced.
- the organic matter is both preserved by the vacuum and maintained longer at low temperature due to the thermally insulating character of the container 60 . The preservation of organic matter is thus extended.
- the box 40 of the first embodiment is intended to be used for food packaging in a household or a professional kitchen. Same is intended to be handled by hand, on a counter, to be placed it in a refrigerator, freezer, dish warmer or oven, and the inner volume V 64 thereof has a size between a few cubic centimeters and a few liters.
- a vacuum storage box 240 is shown in FIG. 4 .
- the box 240 comprises a container 260 and a lid for closing the container 260 , the lid not being shown.
- One of the main differences between the container 260 of the second embodiment and the container 60 of the first embodiment is that, in the second embodiment, the container 260 is a container with high capacity, intended to receive large quantities of organic matter.
- the container 260 has here a capacity of several tens or even several hundreds of liters or a few cubic meters, and is intended to receive liquid organic materials, e.g. oil, or solid organic materials, e.g. fruits.
- the container 260 is shown here on a pallet 261 , configured for being moved by means of a handling tool, which is not shown, such as a pallet truck or a forklift.
- the pallet 261 comprises passages 261 A for receiving handling forks, which are not shown.
- the pallet 261 is not part of the invention, it is just used to specify the context thereof.
- the container 260 has a substantially parallelepiped shape, symmetrical with respect to an axis of symmetry A 260 .
- the container 260 comprises a body 262 with an inner wall 264 and an outer wall 266 .
- the inner wall delimits an inner volume V 264 of the container 260 , the inner volume V 264 being open upwards when the container 260 and the pallet 261 are placed on a horizontal surface S.
- the inner 264 and outer 266 walls are connected to each other at an edge 268 and define therebetween a cavity V 266 , which is closed.
- the lid of the box 240 comprises a body with a boundary which mates with the edge 268 so as to press tightly against the edge 268 of the container 260 when the lid is assembled with the container 260 .
- the container 260 and the lid thereof together form a box in the shape of a barrel or cask with a circular section.
- the cavity V 266 leads to the outside environment through at least one opening 270 .
- an opening 270 is provided in a peripheral wall 267 of the outer wall 266 .
- the opening or each opening 270 comprises a non-return valve 272 , which allows gas to flow from cavity V 266 outwards and prevents gas from flowing from the outside toward cavity V 266 .
- the cavity V 266 leads directly to the inner volume V 264 through at least one passage 274 , which is located here on edge 268 , near the corner between the edge 268 and the inner wall 264 .
- Each passage 274 leads to the inner volume V 264 when the lid is assembled with the container 260 and is located between a graduation 278 of maximum level and the lid assembled with the container 260 .
- each passage 274 comprises a second valve 276 , where each second valve is configured for preventing the flow of liquid from the inner volume V 264 toward the first cavity V 266 , while allowing the gas to flow from the inner volume toward the first cavity.
- the containers 60 and 260 work overall in the same way, i.e. each comprises a cavity V 66 or V 266 wherein it is possible to create a partial vacuum and which is connected by at least one passage 74 or 274 to the inner volume V 64 or V 264 of the box which can thus be depressurized with said cavity.
- the other elements of the vacuum system 2 are adapted accordingly, e.g. the sizing of the pump, the choice of the materials of the container 260 and of the associated lid.
- the container 260 and the associated lid e.g. are made of stainless steel, which is suitable for contact with food.
- a vacuum storage box 340 is shown in FIG. 5 .
- the box 340 has a similar shape and size to the box 40 of the first embodiment, with a container 60 and a lid 80 for closing the container 60 .
- the cavity V 66 defined between the inner 64 and outer 66 walls of the container 60 leads to the inner volume V 64 through the lid 80 , by a passage 74 provided through a top edge 68 of the container 60 which is fluidically connected to a duct 328 provided in the lid 80 .
- the duct 328 comprises a first end 328 A, which is positioned opposite to, and fluidically connected to the passage 74 of the container 60 , and a second end 328 B, opposite the first end 328 A, which leads to the inner volume V 64 through an orifice 96 .
- a sealing component optional and similar to the sealing component 86 of the first embodiment, but not shown in FIG. 5 , is fitted in-between the edge 84 of the lid 80 and the edge 68 of the container 60 .
- the sealing component 86 is designed not to obstruct the flows of gas between the passage 74 and the duct 328 .
- the lid 80 of the third embodiment comprises a valve 376 , which is arranged in the vicinity of the second end 328 B of the duct 328 , here in the hole 96 .
- the valve 376 is located, with respect to the passage 74 , opposite the cavity V 66 .
- the valve 376 comprises of a rotary plugging component 377 .
- the valve 376 is configured for preventing the liquid to flow from the inner volume V 64 toward the first cavity V 66 through the duct 328 and the passage 74 , while allowing the gas to flow from the inner volume V 64 toward the first cavity V 66 .
- a vacuum pump which is not shown, is fluidically connected to the opening 70 and aspirates a certain quantity of gas
- a partial vacuum is created in the cavity V 66 and, via the duct 328 , in the inner volume V 64 , the valve 376 allows the gases to flow from the inner volume V 64 toward the cavity V 66 through the duct 328 and the passage 74 .
- a partial vacuum is present both in the cavity V 66 , which is thermally insulating, and in the inner volume V 64 , which makes it possible to preserve the organic materials that are placed therein.
- a vacuum storage box 440 is shown in FIG. 6 .
- the box 440 is similar in size to box 240 of the second embodiment, with a container 260 and a lid 280 for closing container 260 .
- the lid 280 has here a double-skin and a structure similar to that of the lid 80 of the first embodiment, i.e. with an inner wall 88 and an outer wall 90 which delimit therebetween, a cavity V 80 , which is closed and wherein a partial vacuum is created, so that the lid 280 is thermally insulating.
- the box 440 comprises passages 461 A for handling, similar to the passages 261 A of the pallet 261 , but which are provided directly in a bottom 265 of the container 260 .
- the box 440 is in the form of a pallet.
- the box 440 can thus be moved by means of a handling tool (not shown), such as a trolley equipped with forks, and can be placed on a base provided for this purpose for an automatic fluidic connection of the opening 270 to an end piece of a duct connected to a vacuum pump of the base, the base not being shown.
- the lid 280 here has a parallelepiped shape, the lid 280 pressing tight against the edge 268 at the boundary 284 , which is here a peripheral portion of the inner wall 88 .
- the cavity V 266 provided in-between the inner 264 and outer 266 walls of the container 260 , leads to the outside environment through an opening 270 , which is provided in the bottom 265 of the container 260 .
- the opening 270 comprises a non-return valve ( 272 ), which allows gas to flow from the cavity V 266 to the outside and prevents gas from flowing from the outside toward the cavity V 266 .
- the cavity V 266 leads directly into the inner volume V 264 through a passage 274 , which is provided here in the inner wall 264 and is located between a graduation 278 of maximum level and the lid 280 assembled with the container in the closed configuration of the box 440 .
- a vacuum storage box 540 is shown in FIG. 7 .
- the box 540 has a similar shape and size to those of the box 440 of the fourth embodiment, with a container 260 and a lid 280 wherein a cavity V 80 is provided.
- the cavity V 266 of the container 260 does not lead directly to the inner volume V 264 , but is fluidically connected to the cavity V 80 of the lid, the cavity V 80 leading to the inner volume through a main hole 96 provided in the inner wall 88 of the lid 280 .
- the cavity V 80 of the lid 80 extends the cavity V 66 , in a similar way to the duct 328 of the third embodiment.
- two passages 274 are provided through the edge 268 which connects the inner 264 and outer 266 walls to each other.
- the box 540 is in a closed configuration, wherein the lid 280 rests tightly against the container 260 .
- a peripheral hole 94 is provided around the boundary 284 of the lid 280 , so that the gases can flow between the cavity V 80 of the lid 280 and the cavity V 266 of the container 260 .
- the main hole 96 is provided here in the inner wall 88 in the middle of the two peripheral holes 94 .
- the cavity V 266 leads to the inner volume V 264 through each passage 274 and through the peripheral holes 94 , the cavity V 80 and the main hole 96 .
- a valve 376 is housed in the main hole 96 .
- the valve 376 is configured for preventing the liquid from flowing from the inner volume V 264 toward the cavity V 80 of the lid 280 . Since the cavity V 80 is fluidically connected to the cavity V 266 of the container, the valve 376 also prevents the flow of liquid from the inner volume V 264 toward the cavity V 266 of container 260 .
- the valve 376 is located opposite the cavity V 266 and prevents the flow of liquid from the inner volume V 264 toward the cavity V 266 while allowing the gas to flow from the inner volume V 264 toward the cavity V 266 of the container 260 , through the main hole 96 , the cavity V 80 , the peripheral holes 94 , and the passages 274 .
- a vacuum pump (not shown), is fluidically connected to the opening 270 and sucks up a certain quantity of gas, a partial vacuum is created in the cavity V 66 and, via the passages 274 which are fluidically connected to the opposite peripheral holes 94 , a partial vacuum is further created in the cavity V 80 of the lid 280 . Since the cavity V 80 is further open through the main hole 96 towards the inner volume V 264 , a partial vacuum is created in the inner volume V 264 .
- a plurality of passages of the type of the passage 74 or 274 may be provided for connecting the cavity V 66 or V 266 to the inner volume V 64 or V 264 , each passage being equipped, if appropriate, with a non-return valve of the type of the valve 76 or 276 .
- a pressure drop can be produced more quickly in the inner volume V 64 or V 264 from the pressure drop created in the cavity V 66 or V 266 .
- Such different passages can be distributed over the edge 68 or 268 , about the axis A 60 or V 260 , or at the upper part of the inner wall 64 or 264 .
- a plurality of holes of the type of the holes 96 can be provided in the third and the fifth embodiments.
- a valve blocking liquids and solids, but letting through gases in both directions is mounted in each passage 74 or 274 or in the hole 96 .
- said passage or passages are not equipped with a non-return valve.
- a plurality of openings of the type of the opening 70 or 270 can be provided for connecting the cavity V 66 or V 266 to the outside, each being equipped with a non-return valve of the type of the valve 72 or 272 .
- a pressure drop can be more rapidly achieved in the cavity V 66 or V 266 , in particular by using a plurality of pumps 26 and a plurality of ducts 28 .
- the opening(s) 70 or 270 and equivalent openings can be provided on the bottom 65 or on the peripheral wall 67 or 267 of the container 60 or 260 .
- a seal of the type of the seal 86 in the first embodiment can be provided in each of the other embodiments.
- the geometry thereof is suitable for not obstructing the flow of gas through the passage(s) 74 or 274 .
- the lid 80 or 280 of the first and the fourth embodiments or the lid (not shown) of the second embodiment can have only one skin.
- the lids of the boxes of the second to the fifth embodiments can each be equipped with a valve of the type of the valve 92 of the first embodiment, allowing the inner volume V 64 and the cavity V 66 to be re-pressurized when it is appropriate to open the box.
- such valve can be mounted on the container 60 or an equivalent container, in particular on the outer wall 66 thereof instead of being mounted on the lid.
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Abstract
Description
- This application claims benefit under 35 USC § 371 of PCT Application No. PCT/EP2021/054107 entitled BOX FOR PRESERVATION UNDER VACUUM AND VACUUM-APPLICATION SYSTEM COMPRISING SUCH A BOX, filed on Feb. 19, 2021 by inventor Jean-Françis Bourrec. PCT Application No. PCT/EP2021/0554107 claims priority of French Patent Application No. 20 01708, filed on Feb. 20, 2020.
- The invention relates to a vacuum storage box and to a vacuum storage system comprising such box.
- In the food-processing field, vacuum technology is increasingly being used for storing organic materials, in particular food. This vacuum technology prevents the oxidation of organic materials by reducing the amount of oxygen in contact thereof. Compared to other sterilization methods, in particular heat sterilization, the vacuum method best preserves the organoleptic properties and vitamins of food.
- For organic materials which are sensitive to temperature variations, storage boxes, in addition to being under vacuum, have to be placed in specific enclosures, either cold or hot as appropriate, in order to preserve the organic materials contained in such containers. The preservation of organic materials thus requires maintaining, accordingly, either a cold chain or a hot chain, which is restrictive.
- It is known from WO-2018 189 351-A1 how to use a box with a container and a lid, the container comprising a tube, formed in the walls of the container, which allows vacuum to be created inside the container when the container is placed on a base comprising a vacuum pump. The tube is connected to a system of ducts and valves built-in into the lid, which, overall, provides satisfaction. WO-2018 189 351-A1 is however silent about food preservation when a particular temperature, either cold or hot, is required.
- DE-296 17 720-U1 describes, e.g. an insulating box with a double-wall forming a vacuum cavity, for keeping food warm. DE-296 17 720-U1 does not discuss food preservation.
- The invention more particularly addresses a way to remedy such problems, by proposing a vacuum storage box which is less sensitive to temperature variations.
- For this purpose, the present invention relates to a vacuum storage box, comprising a container and a lid for closing the container. The container comprises a body with an inner wall and an outer wall, the inner wall delimiting an inner volume of the container, wherein the inner volume is open upwards when the container is placed on a horizontal surface. The inner and outer walls are connected to each other at an edge and define therebetween a first cavity, the edge having a closed contour. The lid comprises a body with a boundary having a closed contour and intended to press tightly against the edge of the container when the lid is assembled with the container in a closed configuration of the box. According to the invention, the first cavity leads to the outer environment through at least one opening, each opening comprising a first non-return valve, which lets the gas flow from the first cavity to the outside and prevents the gas from flowing from the outside towards the first cavity, while the first cavity leads to the inner volume through at least one passage.
- According to the invention, the container is thermally insulating when the vacuum is created inside the first cavity. In this way, heat exchange is limited between the food housed inside the inner volume of the container and the outer environment, which increases the shelf life for food sensitive to temperature. When food is refrigerated, the cold is maintained longer; in contrast, when hot food is put in the vacuum storage box, the food remains hot for several hours and can be eaten without the need to be heated up, e.g. using an oven.
- According to advantageous but not mandatory aspects of the invention, such a vacuum storage box may include one or more of the following characteristics taken according to any technically permissible combination:
-
- a second valve is arranged in each passage or opposite the first cavity with regard to said passage, whereas each second valve is configured for preventing the flow of fluid from the inner volume toward the first cavity through the passage or a volume connected to said passage, while allowing the gas to flow from the inner volume toward the first cavity;
- the container has a maximum level graduation while each pass is located between the maximum level graduation and the lid assembled with the container in the closed configuration of the box;
- the lid comprises a valve which connects the outer environment to the inner volume in the closed configuration of the box, the valve being configured for being handled by a user when opening the box, so that air can flow from the outer environment to the inner volume of the box, when the box is in a closed configuration;
- a sealing component is fitted therebetween the edge of the lid and the edge of the container, said sealing component being preferentially made of silicone, preferentially manufactured by pressure molding;
- the sealing component has a thickness and a width, the thickness being measured orthogonal to the perimeter of the lid and the width being measured parallel to the perimeter, while the ratio of the width to the thickness is greater than 5, preferentially greater than 8, even preferentially greater than 12;
- the container and/or the lid are made of a material suitable for contact with food and resistant to thermal shocks, such as borosilicate glass, or metal,
- the lid comprises an inner wall and an outer wall opposite the inner wall, while the inner wall faces the inner volume of the container in the closed configuration of the box, wherein the inner and outer walls of the lid are connected to each other by the peripheral boundary and define a second cavity therebetween, wherein the second cavity is closed or in communication with the inner volume and a partial vacuum is created in the second cavity, and
- each passage of the container leads to the inner volume through the lid, in particular through a duct or through the second cavity.
- According to another aspect, the present invention relates to a system for storing under vacuum, a quantity of organic material, in particular a food, comprising a box as described above and a base for receiving the box. The base comprises a vacuum pump connected to a duct, the duct being intended to be connected to the opening of the container when the box is received by the base.
- Advantageously, the base comprises a pattern in relief for centering the duct of the base with respect to one of the openings of the container of the box.
- The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description, of five embodiments for a vacuum box and a vacuum system according to the principle thereof, given only as an example and making reference to the enclosed drawings, wherein:
-
FIG. 1 is a section of a vacuum system according to a first embodiment of the invention, comprising a vacuum storage box according to a first embodiment of the invention; -
FIG. 2 is a larger scale view of the detail II shown inFIG. 1 , -
FIG. 3 is a larger scale view of the detail III shown inFIG. 1 , -
FIG. 4 is a perspective view of a vacuum storage box according to a second embodiment of the invention; -
FIG. 5 is a perspective and sectional view of a vacuum storage box according to a third embodiment of the invention; -
FIG. 6 is a perspective and sectional view of a vacuum storage box according to a fourth embodiment of the invention, and -
FIG. 7 is a perspective and sectional view of a vacuum storage box according to a fifth embodiment of the invention. - A vacuum system 2 is shown in
FIG. 1 . The system 2 comprises abase 20 and abox 40, thebox 40 comprising acontainer 60 and alid 80. Thebox 40 is intended to receive a quantity of organic material, inparticular food 42, which may be liquid and/or solid. For this purpose, thecontainer 60 and thelid 80 are made of a material suitable for contact with food, non-porous so as to prevent the diffusion of gases through materials, and sufficiently rigid so as not be deformed when a partial vacuum is created in thebox 40, as explained hereafter in the present description. Thecontainer 60 and thelid 80 are e.g. made of metal, e.g. steel, in particular stainless steel, or of a vitreous material, e.g. a simple glass, such as a soda-lime glass, or a glass which resists thermal shocks, such as borosilicate glass, or even of plastic or elastomer. - The
food 42 is not part of the invention but contributes to illustrate the principle thereof. In the example shown, thefood 42 comprises both a solid and a liquid portion. - In
FIG. 1 , thebase 20 is shown on a surface S which is assumed to be horizontal, which corresponds to normal use of the system 2. Thebase 20 comprises anupper surface 22, which is horizontal in the figures and on which thecontainer 60 is placed. - The
base 20 comprises a centering pattern inrelief 24, which is provided on theupper surface 22 and which mates with a matching pattern inrelief 63 of thecontainer 60, in order to provide a correct positioning of thecontainer 60 with respect tobase 20 when abottom 65 of thecontainer 60 is placed on theupper surface 22 of thebase 20. - In the example shown, the centering pattern in
relief 24 is provided and protrudes from thesurface 22 and has a truncated cone shape centered on an axis A24, which is vertical here, while the matching pattern inrelief 63 of thecontainer 60 is arranged as a recess on thebottom 65 of that container. - The
base 20 further comprises apump 26 and aduct 28. - The
duct 28 consists of afirst end 282, which is connected to thepump 26, and asecond end 284, opposite the first end, which leads to theupper surface 22. It is understood that thepump 26 is configured for aspirating a quantity of air through theduct 28 and to discharge said quantity of air toward the outside environment. - In the example shown, the
duct 28 leads from thesurface 22 to the center of the pattern inrelief 24, i.e. thesecond end 284 is aligned with the axis A24. - The
container 60 comprises abody 62 with aninner wall 64 and anouter wall 66. The inner 64 and outer 66 walls are connected to each other at anedge 68, which has a closed contour. In the example, thecontainer 60 has an overall revolution form about an axis A60 which is merged with the axis A24 when thecontainer 60 is placed on thebase 20, with theedge 68 having a truncated cone shape centered on the axis A60 and flared upwards. The axis A60 is thus vertical when the bottom 65 of thebox 60 is placed on a horizontal surface. - In the example, the bottom 65 is part of the
outer wall 66, which further comprises aperipheral wall 67. - The
inner wall 64 comprises a bottom 642 and aside wall 644, which delimit an inner volume V64 of thecontainer 60, while theinner wall 64 and theouter wall 66 define therebetween, a first cavity V66, which is closed, i.e. isolated from the outside by thewalls edge 68. - In the configuration shown in
FIGS. 1 to 3 , thecontainer 60 is placed on theupper surface 22 of the base, which is horizontal, and the inner volume V64 is open upwards. - The first cavity V66 leads to the outer environment through an
opening 70 equipped with anon-return valve 72, as shown schematically on a larger scale inFIG. 3 . In the example shown, theopening 70 is aligned with the axis A60, so that when thecontainer 60 is placed on thebase 20, theopening 70 is aligned with thesecond end 284 of theduct 28 through theupper surface 22. - The
non-return valve 72 has a built-in pluggingcomponent 722, which has here the shape of a ball and which is loaded by anelastic component 724, shown here as a spring. Thenon-return valve 72 of eachopening 70 allows the gas to flow from the cavity V66 toward the outside and prevents the gas from flowing from the outside toward the cavity V66. Thesecond end 284 of theduct 28 is equipped with a nipple—which is not shown—which fluidically connects theduct 28 with theopening 70. - The cavity V66 leads to the inner volume V64 through a
passage 74. In the example shown, thepassage 74 is provided through theedge 68 near ajunction corner 682 between theedge 68 and theinner wall 64. Thus, the air is not prevented from flowing through thepassage 74 when thelid 80 is fitted onto thecontainer 60 in a closed configuration of thebox 40, as shown inFIGS. 1 and 2 . - Advantageously, a
flap 76 is provided in thepassage 74 which leads directly to the inner volume V64. Thevalve 76 allows the gas to flow from the inner volume V64 toward the cavity V66 but is configured so as to prevent theorganic materials 42 contained in thecontainer 60 from penetrating into the cavity V66. More particularly, when theorganic materials 42 comprise a liquid portion, thevalve 76 prevents the liquid from flowing from the inner volume V64 toward the cavity V66. - Optionally, the
valve 76 is also the “non-return” type, with a similar structure to thevalve 72. Anon-return type valve 76 is shown schematically and on a larger scale inFIG. 2 , thevalve 76 comprising a pluggingcomponent 762, shown in the form of a ball, loaded by anelastic component 764, shown here by a spring. In this case, the non-return valve is in free-flow from the inner volume V64 toward the cavity V66 and no-flow in the opposite direction. - Other types of
valves 76 are also conceivable. - The
container 60 has amaximum level graduation 78, which is shown as a dotted-dashed line inFIG. 1 . Thegraduation 78 indicates to a user a level not to exceed when a user fills thecontainer 60 with a quantity of organic materials. Thegraduation 78 is thus a horizontal line when thecontainer 60 is placed on a horizontal surface. Thegraduation 78 is preferentially indicated on theinner wall 64 of thecontainer 60. As appropriate, thegraduation 78 is printed on the surface of theinner wall 64, or is embossed during the fabrication of thecontainer 60. In particular, when thecontainer 60 is made of a vitreous material such as borosilicate glass, thegraduation 78 can be integrated into a mold for manufacturing thecontainer 60. - In the example shown, a distance d78 between the bottom 642 of the
inner wall 64 and thegraduation 78, measured parallel to the axis A60, is equal to 75% of a height h64 between the bottom 642 of theinner wall 64 and thejunction corner 682 of theedge 68 with theinner wall 64. The value of the ratio d78/h64 can vary between 0.5 and 0.95, depending on the height of thecontainer 60. - Each
passage 74 is located, at height, between thegraduation 78 and thelid 80 assembled with thecontainer 60 in the closed configuration of thebox 40, so as to prevent the liquid to flow from the inner volume V64 toward the first cavity V66. - The
lid 80 comprises abody 82 with aboundary 84. Theboundary 84 has a closed contour. Thelid 80 is configured for pressing tight against theedge 68 of thecontainer 60. In this example, theboundary 84 has a truncated cone shape, with an angle at the vertex which is the identical to the angle of theedge 68. Thus, in the closed configuration of the box shown inFIGS. 1 and 2 , the junction between thelid 80 and thecontainer 60 is considered to be leaktight, i.e. no liquid or gas can pass between theedge 68 and theboundary 84.FIGS. 1 and 2 show a cross-sectional representation of thebox 40, with theedge 68 facing theboundary 84 being both represented by straight and parallel segments. - Advantageously, a sealing
component 86 is fitted therebetween theboundary 84 of thelid 80 and theedge 68 of thecontainer 60. The sealingcomponent 86 is housed here inside agroove 840 provided in theboundary 84 of thelid 80. In a variant, the sealingcomponent 86 can be housed on theedge 68 of thecontainer 60, in particular in a groove in theedge 68. - The sealing
component 86 is advantageously removable, so as to facilitate the cleaning of thelid 80 and of the sealingcomponent 86, and to make it possible to replace thesealing component 86 when same is damaged. - The sealing
compound 86 is here an O-ring with a rectangular section, with twoopposite sides 862 arranged parallel to theboundary 84 of thelid 80, and two otheropposite sides 864 arranged orthogonal to theboundary 84. - A width L86 of the sealing
compound 86 is defined as a distance between the twoopposite sides 864, measured parallel to theboundary 84. Similarly, a thickness E86 of the sealingcomponent 86 is defined as a distance between the twoopposite sides 864 of the sealingcomponent 86 measured orthogonal to theboundary 84 of thelid 80. - Since the
box 40 is intended for the preservation under vacuum of organic materials such as food, the sealingcompound 86 is preferentially made of a material suitable for contact with food and resistant to the flowing of gases. Thus, the sealingcomponent 86 is preferentially made of silicone, preferentially manufactured by pressure molding, so as to reduce the porosity of the material. When the vacuum is created in the inner volume V64, the sealingcomponent 86 is compressed between theboundary 84 and theedge 68, since gas infiltrations tend to occur through the sealingcomponent 86 in the direction of the width, i.e. between theopposite sides 864 separated by the width L86. In order to make gas infiltrations through the sealingcomponent 86 as small as possible, the sealingcomponent 86 has the largest possible ratio L86/E86 between the width L86 thereof divided by the thickness E86 thereof. Thus, the ratio between the width L86 divided by the thickness E86 is greater than 5, preferentially greater than 8, preferentially greater than 12. For practical reasons when manufacturing theseal 86, the ratio L86/E86 is kept smaller than or equal to 50, preferentially to 25. - Advantageously, the
lid 80 comprises aninner wall 88 and anouter wall 90, opposite theinner wall 88. In other words, thelid 80 has a double-skin. In the closed configuration of the box, theinner wall 88 faces the inner volume V64 of thecontainer 60. Theinner wall 88 andouter wall 90 are joined to each other by theboundary 84 and define therebetween a cavity V80. The cavity V80 is closed, and a partial vacuum is created inside the cavity V80 so that thelid 80 is thermally insulating. - Schematically, according to the kinetic theory of gases, the temperature of a gas and the thermal conductivity of a gas depend on the collisions between the molecules of said gas. When the pressure of the gas decreases and a partial vacuum is created, the probability of collision between the gas molecules decreases, and so does the thermal conductivity. More generally, when a partial vacuum is created in a closed volume, such as the cavity V80, said volume becomes thermally insulating. The partial vacuum in the cavity V80 is created at the factory when the
lid 80 is manufactured, unlike the partial vacuum created by a user in the cavity V66 or in the inner volume V64, as explained herein. - The
lid 80 further comprises avalve 92 which connects the outer environment to the inner volume V64 in the closed configuration of thebox 40. Thevalve 92 is configured for being handled by a user at the opening of thebox 40; from the outside of the closed box, so as to allow air to flow from the outside environment toward the inner volume V64 of thebox 40 when thebox 40 is in a closed configuration, i.e. so as to re-pressurize the inner volume V64. Without the intervention of a user, thevalve 92 does not allow air to flow through. - The operation of the vacuum system 2 is further described.
- First, a user places the
container 60 on theupper surface 22 of thebase 20, so that the pattern inrelief 24 corresponds with a matching pattern in relief provided in theouter wall 66 of thecontainer 60. Theduct 28 of the base is thus aligned with theopening 70 of thecontainer 60. In other words, the pattern inrelief 24 is a centering pattern in relief of theduct 28 of the base with respect to one of theopenings 70 of thecontainer 60. - The user then places a quantity of
organic matter 42 which they wish to preserve in the inner volume V64 of thecontainer 60, taking care not to exceed thegraduation 78, and then close thecontainer 60 with thelid 80. Of course, the user can also fill thecontainer 60 and assemble thelid 80 with thecontainer 60 before installing thecontainer 60 on thebase 20. The vacuum system 2 is then in the configuration shown inFIG. 1 , with theboundary 84 of thelid 80 pressing tight between theedge 68 of thecontainer 60, the sealingcomponent 86 being fitted in-between theboundary 84 and theedge 68. - The user then actuates the
pump 26 of thebase 20, e.g. via of an on/off button which is not shown. Alternatively, thebase 20 comprises a sensor 30 configured for detecting the presence of thecontainer 60 on the base and/or automatically controls the start of thepump 26, as considered in WO-2018/189351-A1. - The
pump 26 thus draws the gas contained in the cavity V66 via theduct 28 which is fluidically connected to the cavity, through thenon-return valve 72 which allows free-flow in this direction. The gas contained within the inner volume V64 is sucked up into the cavity V66, via thepassage 74 and through thenon-return valve 76 which allows free-flow in this direction, due to the partial vacuum created inside the cavity. The air coming from the inner volume V64 is discharged outwards through thenon-return valve 72, theduct 28, and thepump 26. - Thus, under the action of the
pump 26, a partial vacuum is created both inside the cavity V66 and inside the inner volume V64. When the partial vacuum level reaches a suitable level which is chosen by the user or by acontrol device 32 of the system 2, thepump 26 stops and the user can remove thebox 40 from thebase 20. Due to thenon-return valve 72, the outside air cannot flow from the outside toward the cavity V66. The partial vacuum is maintained in the cavity V66 and in the inner volume V64, and the partial vacuum inside the inner volume V64 holds thelid 80 in place over thecontainer 60, by compressing theseal 86 which efficiently isolates the inner volume V64 from the outside environment. - Due to the partial vacuum in the cavity V66, the cavity V66 is thermally insulating, i.e. heat transfers between the inner volume V64 and the outside environment are reduced. Thus, when a quantity of organic matter initially refrigerated is placed in the
box 40 and then put under vacuum, the organic matter is both preserved by the vacuum and maintained longer at low temperature due to the thermally insulating character of thecontainer 60. The preservation of organic matter is thus extended. - In contrast, if an initially hot quantity of organic matter, e.g. a cooked dish which is still hot, is placed in the
box 40, the placing under vacuum of thebox 40 makes it possible to preserve the dish by reducing the oxidation due to oxygen from the air and to keep the dish warm for longer. It is thus possible to eat the dish hot several hours after the closure of thebox 40, without having to reheat it, which is particularly convenient and saves energy. - The
box 40 of the first embodiment is intended to be used for food packaging in a household or a professional kitchen. Same is intended to be handled by hand, on a counter, to be placed it in a refrigerator, freezer, dish warmer or oven, and the inner volume V64 thereof has a size between a few cubic centimeters and a few liters. - In the other embodiments shown in
FIGS. 4 to 7 , elements similar to the elements of the first embodiment have the same references and work in the same way. The following is mainly devoted to describing the differences between each of the embodiments. - A
vacuum storage box 240, according to a second embodiment of the invention, is shown inFIG. 4 . Thebox 240 comprises acontainer 260 and a lid for closing thecontainer 260, the lid not being shown. One of the main differences between thecontainer 260 of the second embodiment and thecontainer 60 of the first embodiment is that, in the second embodiment, thecontainer 260 is a container with high capacity, intended to receive large quantities of organic matter. - The
container 260 has here a capacity of several tens or even several hundreds of liters or a few cubic meters, and is intended to receive liquid organic materials, e.g. oil, or solid organic materials, e.g. fruits. Thecontainer 260 is shown here on a pallet 261, configured for being moved by means of a handling tool, which is not shown, such as a pallet truck or a forklift. For this purpose, the pallet 261 comprisespassages 261A for receiving handling forks, which are not shown. In this embodiment, the pallet 261 is not part of the invention, it is just used to specify the context thereof. - The
container 260 has a substantially parallelepiped shape, symmetrical with respect to an axis of symmetry A260. Thecontainer 260 comprises abody 262 with aninner wall 264 and anouter wall 266. The inner wall delimits an inner volume V264 of thecontainer 260, the inner volume V264 being open upwards when thecontainer 260 and the pallet 261 are placed on a horizontal surface S. The inner 264 and outer 266 walls are connected to each other at anedge 268 and define therebetween a cavity V266, which is closed. - The lid of the
box 240 comprises a body with a boundary which mates with theedge 268 so as to press tightly against theedge 268 of thecontainer 260 when the lid is assembled with thecontainer 260. - In a variant, the
container 260 and the lid thereof together form a box in the shape of a barrel or cask with a circular section. - The cavity V266 leads to the outside environment through at least one
opening 270. InFIG. 4 , anopening 270 is provided in aperipheral wall 267 of theouter wall 266. - The opening or each
opening 270 comprises anon-return valve 272, which allows gas to flow from cavity V266 outwards and prevents gas from flowing from the outside toward cavity V266. - The cavity V266 leads directly to the inner volume V264 through at least one
passage 274, which is located here onedge 268, near the corner between theedge 268 and theinner wall 264. Eachpassage 274 leads to the inner volume V264 when the lid is assembled with thecontainer 260 and is located between agraduation 278 of maximum level and the lid assembled with thecontainer 260. - Advantageously, each
passage 274 comprises asecond valve 276, where each second valve is configured for preventing the flow of liquid from the inner volume V264 toward the first cavity V266, while allowing the gas to flow from the inner volume toward the first cavity. - More generally, it is understood that despite the difference in size and scale between the
container 260 of the second embodiment and thecontainer 60 of the first embodiment, thecontainers passage container 260 and of the associated lid. Thecontainer 260 and the associated lid e.g. are made of stainless steel, which is suitable for contact with food. - A
vacuum storage box 340, according to a third embodiment the invention, is shown inFIG. 5 . - The
box 340 has a similar shape and size to thebox 40 of the first embodiment, with acontainer 60 and alid 80 for closing thecontainer 60. - One of the main differences between the
box 340 of the third embodiment and thebox 40 of the first embodiment is that, in the third embodiment, the cavity V66 defined between the inner 64 and outer 66 walls of thecontainer 60 leads to the inner volume V64 through thelid 80, by apassage 74 provided through atop edge 68 of thecontainer 60 which is fluidically connected to aduct 328 provided in thelid 80. - More specifically, the
duct 328 comprises afirst end 328A, which is positioned opposite to, and fluidically connected to thepassage 74 of thecontainer 60, and asecond end 328B, opposite thefirst end 328A, which leads to the inner volume V64 through anorifice 96. When a sealing component, optional and similar to thesealing component 86 of the first embodiment, but not shown inFIG. 5 , is fitted in-between theedge 84 of thelid 80 and theedge 68 of thecontainer 60. The sealingcomponent 86 is designed not to obstruct the flows of gas between thepassage 74 and theduct 328. - The
lid 80 of the third embodiment comprises avalve 376, which is arranged in the vicinity of thesecond end 328B of theduct 328, here in thehole 96. In other words, thevalve 376 is located, with respect to thepassage 74, opposite the cavity V66. In the example inFIG. 5 , thevalve 376 comprises of arotary plugging component 377. Thevalve 376 is configured for preventing the liquid to flow from the inner volume V64 toward the first cavity V66 through theduct 328 and thepassage 74, while allowing the gas to flow from the inner volume V64 toward the first cavity V66. - When a vacuum pump, which is not shown, is fluidically connected to the
opening 70 and aspirates a certain quantity of gas, a partial vacuum is created in the cavity V66 and, via theduct 328, in the inner volume V64, thevalve 376 allows the gases to flow from the inner volume V64 toward the cavity V66 through theduct 328 and thepassage 74. Thus, a partial vacuum is present both in the cavity V66, which is thermally insulating, and in the inner volume V64, which makes it possible to preserve the organic materials that are placed therein. - A
vacuum storage box 440, according to a fourth embodiment of the invention, is shown inFIG. 6 . - The
box 440 is similar in size tobox 240 of the second embodiment, with acontainer 260 and alid 280 for closingcontainer 260. Thelid 280 has here a double-skin and a structure similar to that of thelid 80 of the first embodiment, i.e. with aninner wall 88 and anouter wall 90 which delimit therebetween, a cavity V80, which is closed and wherein a partial vacuum is created, so that thelid 280 is thermally insulating. - Among the differences between the
box 440 of the fourth embodiment and the previous embodiments, thebox 440 comprisespassages 461A for handling, similar to thepassages 261A of the pallet 261, but which are provided directly in abottom 265 of thecontainer 260. Thus, thebox 440 is in the form of a pallet. Thebox 440 can thus be moved by means of a handling tool (not shown), such as a trolley equipped with forks, and can be placed on a base provided for this purpose for an automatic fluidic connection of theopening 270 to an end piece of a duct connected to a vacuum pump of the base, the base not being shown. - The
lid 280 here has a parallelepiped shape, thelid 280 pressing tight against theedge 268 at theboundary 284, which is here a peripheral portion of theinner wall 88. - In the fourth embodiment, the cavity V266, provided in-between the inner 264 and outer 266 walls of the
container 260, leads to the outside environment through anopening 270, which is provided in thebottom 265 of thecontainer 260. Theopening 270 comprises a non-return valve (272), which allows gas to flow from the cavity V266 to the outside and prevents gas from flowing from the outside toward the cavity V266. - On the other hand, the cavity V266 leads directly into the inner volume V264 through a
passage 274, which is provided here in theinner wall 264 and is located between agraduation 278 of maximum level and thelid 280 assembled with the container in the closed configuration of thebox 440. - A
vacuum storage box 540, according to a fifth embodiment of the invention, is shown inFIG. 7 . - The
box 540 has a similar shape and size to those of thebox 440 of the fourth embodiment, with acontainer 260 and alid 280 wherein a cavity V80 is provided. - One of the main differences between the
box 540 of the fifth embodiment and thebox 440 of the fourth embodiment, is that in the fifth embodiment, the cavity V266 of thecontainer 260 does not lead directly to the inner volume V264, but is fluidically connected to the cavity V80 of the lid, the cavity V80 leading to the inner volume through amain hole 96 provided in theinner wall 88 of thelid 280. Thus, in this embodiment, the cavity V80 of thelid 80 extends the cavity V66, in a similar way to theduct 328 of the third embodiment. - More precisely, two
passages 274 are provided through theedge 268 which connects the inner 264 and outer 266 walls to each other. - In
FIG. 7 , thebox 540 is in a closed configuration, wherein thelid 280 rests tightly against thecontainer 260. Opposite to eachpassage 274, aperipheral hole 94 is provided around theboundary 284 of thelid 280, so that the gases can flow between the cavity V80 of thelid 280 and the cavity V266 of thecontainer 260. - The
main hole 96 is provided here in theinner wall 88 in the middle of the twoperipheral holes 94. Thus, by extension, the cavity V266 leads to the inner volume V264 through eachpassage 274 and through theperipheral holes 94, the cavity V80 and themain hole 96. - A
valve 376 is housed in themain hole 96. Thevalve 376 is configured for preventing the liquid from flowing from the inner volume V264 toward the cavity V80 of thelid 280. Since the cavity V80 is fluidically connected to the cavity V266 of the container, thevalve 376 also prevents the flow of liquid from the inner volume V264 toward the cavity V266 ofcontainer 260. - In other words, with respect to the
passage 274, thevalve 376 is located opposite the cavity V266 and prevents the flow of liquid from the inner volume V264 toward the cavity V266 while allowing the gas to flow from the inner volume V264 toward the cavity V266 of thecontainer 260, through themain hole 96, the cavity V80, theperipheral holes 94, and thepassages 274. - When a vacuum pump (not shown), is fluidically connected to the
opening 270 and sucks up a certain quantity of gas, a partial vacuum is created in the cavity V66 and, via thepassages 274 which are fluidically connected to the oppositeperipheral holes 94, a partial vacuum is further created in the cavity V80 of thelid 280. Since the cavity V80 is further open through themain hole 96 towards the inner volume V264, a partial vacuum is created in the inner volume V264. - Thus, by means of only one vacuum pump, it is possible to create a partial vacuum both in the cavity V266 of the
container 260 and in the cavity V80 of thelid 280, which are then thermally insulating, and at the same time in the inner volume V264, which helps to preserve the organic materials which are placed thereof. - According to a variant, not shown, of the first to the fourth embodiments of the invention, a plurality of passages of the type of the
passage valve edge inner wall holes 96 can be provided in the third and the fifth embodiments. - In a variant, a valve blocking liquids and solids, but letting through gases in both directions, is mounted in each
passage hole 96. - According to another variant, in particular if it is possible to guarantee that no product is in danger of falling on the passage(s) 74 or 274, said passage or passages are not equipped with a non-return valve.
- According to another not shown variant of the invention, a plurality of openings of the type of the
opening valve pumps 26 and a plurality ofducts 28. - The opening(s) 70 or 270 and equivalent openings can be provided on the bottom 65 or on the
peripheral wall container - In a variant, a seal of the type of the
seal 86 in the first embodiment can be provided in each of the other embodiments. In such a case, the geometry thereof is suitable for not obstructing the flow of gas through the passage(s) 74 or 274. - In a variant, the
lid - The embodiment and the variants mentioned above can be combined with each other so as to generate new embodiments of the invention. In particular, the lids of the boxes of the second to the fifth embodiments can each be equipped with a valve of the type of the
valve 92 of the first embodiment, allowing the inner volume V64 and the cavity V66 to be re-pressurized when it is appropriate to open the box. In a variant, such valve can be mounted on thecontainer 60 or an equivalent container, in particular on theouter wall 66 thereof instead of being mounted on the lid.
Claims (20)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRFR2001708 | 2020-02-20 | ||
FR2001708A FR3107516B1 (en) | 2020-02-20 | 2020-02-20 | Vacuum storage box and vacuum system comprising such a box |
PCT/EP2021/054107 WO2021165445A1 (en) | 2020-02-20 | 2021-02-19 | Box for preservation under vacuum and vacuum-application system comprising such a box |
Publications (1)
Publication Number | Publication Date |
---|---|
US20230080132A1 true US20230080132A1 (en) | 2023-03-16 |
Family
ID=70295439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/798,311 Abandoned US20230080132A1 (en) | 2020-02-20 | 2021-02-19 | Box for preservation under vacuum and vacuum-application system comprising such a box |
Country Status (7)
Country | Link |
---|---|
US (1) | US20230080132A1 (en) |
EP (1) | EP4107089B1 (en) |
KR (1) | KR20220141816A (en) |
CN (1) | CN115151492A (en) |
CA (1) | CA3167243A1 (en) |
FR (1) | FR3107516B1 (en) |
WO (1) | WO2021165445A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3128694B1 (en) * | 2021-11-04 | 2024-02-23 | Seb Sa | Vacuum food storage box |
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Also Published As
Publication number | Publication date |
---|---|
FR3107516A1 (en) | 2021-08-27 |
WO2021165445A1 (en) | 2021-08-26 |
CA3167243A1 (en) | 2021-08-26 |
FR3107516B1 (en) | 2022-03-11 |
KR20220141816A (en) | 2022-10-20 |
EP4107089B1 (en) | 2023-12-27 |
EP4107089A1 (en) | 2022-12-28 |
CN115151492A (en) | 2022-10-04 |
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