FR3099979A1 - Hygienic cabinet with hidden magnetic articulation and heating or cooling double jacket space. - Google Patents

Abstract

Hygienic cabinet with hidden magnetic articulation and heating or cooling double jacket space. The present invention relates to a metal cabinet and preferably of stainless steel (100), characterized in that its internal volume (V2) intended to receive products, is refrigerated or heated by a stirring of air operated inside a room. double envelope constituting it, in such a way that no deformation, arrangement, equipment or accessory liable to retain impurities, appears on the walls of said internal volume (V2). It consists of an interior envelope (120) placed in the center of an exterior envelope (110) forming between them a residual free space (V1r) closed by a face plane (117), the interior surfaces of the planes (117) (111) (112) (113) (114) and (115) constituting the outer casing (110), are covered with a thermal insulation (130), the outer surfaces of the planes (121) (122) (123) (124) and (125) of the inner casing (120) remain bare and without thermal insulation. The residual free space (V1r) has inside the evaporator (160) a refrigeration installation, the other components of which, the compressor (140), the condenser (150) and the expansion valve are placed outside the unit. the outer casing (110). A sealed and insulated door called a magnetic door (200) closes the interior volume (V2) of the interior envelope (120). On contact with the evaporator (160) or the heating element, the air contained in the closed residual free space (V1r) transfers the temperature constantly and regularly to the inner envelope (120). Figure for the abstract: Fig. 2

Description

Hygienic cabinet with concealed magnetic joint and heating or cooling jacket space.

The present invention relates to a metal and preferably stainless steel piece of furniture, characterized on the one hand in that its useful internal space intended to receive products, is refrigerated or heated by a circulation of air inside a free volume consisting of a double sealed wall outside said useful internal space, and on the other hand in that the door closing said useful internal space is animated around non-visible magnetic joints, in such a way that no arrangement, equipment or accessory likely to retain impurities and/or make disinfection and cleaning imperfect, does not appear on the walls of said useful internal space.

We know that certain industrial sectors such as the food sector, aeronautics and space or even medicine, require a very high level of cleanliness both for human intervention and for the devices and furniture used. , implying for the latter frequent cleaning, severe disinfection and consecutively numerous checks.

The quest for a maximum level of cleanliness for furniture subject to frequent handling on a daily basis implies the essential absence in the useful internal space of fittings such as holes, grooves, grooves, etc., of visible mechanical elements such as hinges , screw or bolt heads, uprights and shelf supports etc., or equipment such as evaporator block, ventilation openings, heating element, etc.

It is known to date in the trade of refrigerators, refrigerated cabinets, cold rooms and other storage units whose operation is mainly based on thermodynamics driven by an electric motor, the other techniques used such as absorption or Peltier effect being reserved for more modest applications and less demanding in terms of performance.

Most often, this domestic or industrial equipment works like heat pumps by taking heat from the side where you want to obtain a low temperature to reject it in the outside atmosphere, according to a cycle called the CARNOT cycle based on the change of phase of a heat transfer liquid.

1. La compression: Le fluide réfrigérant à l’état de vapeur est compressé et sort du compresseur à haute pression et haute température,
2. La condensation: La vapeur très chaude (et compressée) passe dans un condenseur (ou échangeur de chaleur) où elle va céder de la chaleur au milieu ambiant, ce qui va lui permettre de se liquéfier, c'est-à-dire passer de l'état vapeur (gazeux) à l'état liquide,
3. La détente: A la sortie du condenseur le liquide sous haute pression est détendu en faisant baisser rapidement la pression dans un détendeur (passage du fluide au travers d'un orifice de petit diamètre). Cette subite baisse de pression a pour effet de vaporiser une partie du fluide. Le réfrigérant est alors à son état le plus froid du cycle,
4. L’évaporation: Le fluide froid et partiellement vaporisé circule dans un évaporateur qui se place dans l’espace à refroidir pour soustraire la chaleur qui s’y trouve. En absorbant la chaleur, le fluide s’évapore complètement pour se retrouver dans l’état du début de cycle.

The heat transfer fluid phase change cycle takes place in four stages:

1. Compression: The refrigerant in the vapor state is compressed and leaves the compressor at high pressure and high temperature,
2. Condensation: The very hot (and compressed) vapor passes through a condenser (or heat exchanger) where it will give up heat to the ambient environment, which will allow it to liquefy, i.e. to pass from the vapor (gaseous) state in the liquid state,
3. Expansion: At the outlet of the condenser, the liquid under high pressure is expanded by rapidly lowering the pressure in an expansion valve (passage of the fluid through a small diameter orifice). This sudden drop in pressure has the effect of vaporizing part of the fluid. The refrigerant is then at its coldest state in the cycle,
4. Evaporation: The cold and partially vaporized fluid circulates in an evaporator which is placed in the space to be cooled to subtract the heat which is there. By absorbing the heat, the fluid evaporates completely to find itself in the state of the beginning of the cycle.

This technique commonly used today therefore leads to placing inside the space to be cooled, the evaporator of the circuit whose function is to extract the heat and therefore lower the temperature. If the drop in temperature proves to be effective, the temperature obtained in the useful internal space is not evenly distributed and the readings show significant differences between the environment close to the evaporator and the zones further away from it. On the other hand, if the drop in temperature is significant, it leads to negative temperatures, the formation of frost on the walls of the useful internal space, this implying the provision of periodic defrosting and the evacuation of the water resulting from this operation.

In addition to these verified findings, the presence of the evaporator and the pipes connected to it in the internal volume of the refrigerated space goes against the cleanliness requirements, these obstacles naturally accumulating impurities and dirt during operation, making consecutively more difficult and less effective cleaning and disinfection operations.

It is also known in the trade for cupboards, furniture and other equipment which on the contrary generate positive heat inside their useful internal space, so as to keep certain products and articles frost-free or bring these products and articles to use or consumption temperatures.

Most often, these materials and equipment simply use at least one heating resistor placed inside said useful internal space, to generate the rise or maintain the desired temperature. The rise to certain temperatures by this means can lead to the deformation of the envelope of the internal space, which implies a limitation in the use of the equipment.

In addition to this consequence, the presence of resistors in the useful internal space goes against cleanliness requirements, as this equipment naturally accumulates impurities and dirt during operation and hinders cleaning and disinfection operations.

Anxious to optimize the storage conditions offered by most refrigerated or heated furniture while minimizing the fittings and technical elements present inside the internal space and hindering cleanliness and/or the means of obtain, the author of the present invention has already filed several patents of invention of close or similar orientation, including for example the patent of invention number FR 3019206 of 02/10/2015 describing a principle of magnetic articulation integrated into inside the wall of metal furniture, to avoid traditional hinges commonly exposed to dust, dirt and various stains,

Continuing his research after the concrete application of his previous inventions, the author of this patent imagined a refrigerated or heated cabinet with an integral internal volume, that is to say an internal volume of geometric shape such as a polyhedron. regular or irregular whose walls constituting it are flat, smooth and free of shapes, fittings, accessories or added equipment, likely to constitute obstacles retaining impurities, stains or dirt and to make cleaning and disinfection of the internal space imperfect . The refrigerated or heated cabinet of the invention uses for the closure of its useful internal space a sealed door provided with non-apparent magnetic joints called magnetic door, subject to patent FR 3019206 of 02/10/2015 mentioned above and can receive one or more removable shelves arranged on magnetic uprights themselves removable to be easily removed and thus facilitate cleaning and perfect disinfection of the internal volume.

According to the preferred method of manufacture of the invention, the refrigerated or heated cabinet called hygienic cabinet is preferably made of metal and more precisely of stainless steel, preferably in the shape of a regular polyhedron such as a hexahedron or cube or even an irregular polyhedron such as a rectangular parallelepiped. It consists on the one hand of a first structure called the outer envelope inside which is preferably centrally arranged a second structure preferably of the same shape called the inner envelope.

According to this preferred method of manufacture of the invention, the outer casing consists of two superposed rigid planes including an upper plane called the high plane and a lower plane called the low plane separated from each other by three successive peripheral planes, perpendicular and joined together by a on their sides to the side corresponding to the top plane and the bottom plane, including a plane called the bottom plane and two opposite planes called the side planes, so as to leave an access plane called the outer envelope access plane to its interior volume.

According to this preferred method of manufacture of the invention, the inner casing consists of two superposed rigid planes including an upper plane called upper plane and a lower plane called lower plane separated from each other by three successive peripheral planes, perpendicular and joined by a on their sides to the corresponding side of the upper plane and of the lower plane, including a plane called the end plane and two opposite planes called the side planes, so as to leave a common free access plane called the inner envelope access plane at its interior volume.

According to this preferred method of manufacture of the invention, the connection edges of the three peripheral planes between them as well as the connection edges of the latter with the upper plane and the lower plane of the inner casing present over their entire length, a radius called cleanliness radius of suitable dimensions to avoid the accumulation of dust, dirt and various dirt and facilitate the cleaning and disinfection of the internal space of the inner envelope.

According to a different manufacturing method of the invention, the connecting edges of the side planes with the upper plane and the lower plane of the inner envelope, have over their entire length, a radius called cleanliness radius of dimensions adapted to avoid the accumulation of dust, dirt and various dirt and facilitate the cleaning and disinfection of the internal space of the inner envelope, said cleanliness radius extending outside the access plane of the inner envelope and over a precise length, being obtained by the method of manufacture to form at each corner of said access plane an integrated metal tab called a corner tab. Said corner lugs extending beyond the access plane of the inner envelope, the cleanliness radii interconnecting the side planes, upper plane and lower plane of said envelope, allow by their arcuate shape of a radius equivalent to that of the cleanliness departments, the rapid installation and maintenance of a seal around and outside the access plane of the inner envelope, opposite the magnetic door, closing said access plane .

According to the preferred method of manufacture of the invention, the inner envelope is placed and immobilized in the center of the inner volume of the outer envelope so as to leave a residual free space between the outer face of the inner envelope and the inner face of the outer envelope. Said residual free space is closed between the outer envelope and the inner envelope on the combined access plane of the two envelopes, by a peripheral plane called the face plane.

According to this preferred method of manufacture of the invention, the inner faces of the upper plane, lower plane, end plane and side planes of the inner envelope are free of any form, relief, arrangement, accessory or equipment likely to retain dust, impurities, dirt, dirt and/or hinder the cleaning and total disinfection of the interior volume of the inner envelope.

According to this preferred method of manufacture of the invention, the interior surfaces of the top plane, bottom plane, bottom plane, side plane and front plane of the outer casing are covered, according to the intended use of the sanitary furniture, with a thermal insulating material, for example polyurethane foam, rock wool or any other suitable thermal insulation, the outer surfaces of the upper plane, lower plane, end plane and side planes of the inner envelope remain bare and without thermal insulation for a optimum conductivity of cold and heat.

According to this preferred method of manufacture of the invention, the residual free space receives between the insulated inner surface of the outer casing and the uninsulated outer surface of the inner casing and at a precise location and for example between the plane of bottom and end plane, the evaporator of a thermodynamic installation according to the so-called CARNOT cycle, the other functional elements of which, i.e. a compressor, a condenser, an expansion valve and the pipes connecting them to each other, are located outside the the outer casing and preferably close to the bottom plane thereof, preferably facing the evaporator.

According to this preferred method of manufacture of the invention, the evaporator is made in the form of a compact block, placed inside the residual free space between the insulated inner surface of the outer casing and the outer surface not isolated from the inner envelope and at a precise location, for example between the bottom plane and the end plane. The air contained in the residual free space then cools on contact with the evaporator and moves inside said residual free space, driven by a ventilation device integrated into said evaporator thus generating a mixing enveloping all the walls of the inner envelope and optimizing the exchange surface and the desired temperature uniformity.

According to another manufacturing method of the invention, the evaporator inside the residual free space between the insulated inner surface of the outer casing and the uninsulated outer surface of the inner casing is placed at a place precise and for example between the bottom plane and the end plane of the hygienic unit. The air contained in the residual free space then cools on contact with the evaporator and moves inside said residual free space, by natural convection, the cold air falling downwards and the hot air rising upwards, thus enveloping all the walls of the inner envelope. This embodiment of the invention is rather reserved for equipment requiring only low cooling capacities.

According to a different method of manufacture of the invention, the residual free space between the insulated inner surface of the outer casing and the uninsulated outer surface of the inner casing, has one or more specific locations adapted and compatible and by example between the bottom plane and the end plane, at least one heating element and preferably at least one heating resistor. The air contained in the residual free space then heats up on contact with said heating element and moves inside said residual free space, animated naturally or by one or more added ventilation devices, thus generating a mixing enveloping all the walls of the inner envelope and optimizing the exchange surface and the desired temperature uniformity.

According to the preferred method of manufacture of the invention, the residual free space between the insulated inner surface of the outer casing and the uninsulated outer surface of the inner casing, has at several specific locations adapted and compatible and in particular jointly with the outer surface of at least one of the upper, lower, side planes and/or the inner surface of the front plane of the inner envelope and preferably opposite each of the two side planes of the inner envelope, magnetic assemblies consisting of one or more magnets associated or separated from each other, to cooperate by simple magnetic attraction with the magnetic assemblies of the magnetic door closing the access plane of the inner casing.

According to the preferred method of manufacture of the invention, the residual free space between the insulated inner surface of the outer casing and the uninsulated outer surface of the inner casing, has at several precise locations adapted and compatible, sets magnets made up of one or more magnets associated or separated from each other, preferably secured to the outer surface of at least one of the upper plane, lower plane, end plane and side planes of the inner casing, to allow to receive attached by simple magnetic attraction and in correspondence on the inner surface of these planes inside the volume of the inner casing, a plurality of removable accessories such as uprights, wedges, stops, shelves, rails, etc. Thus, said accessories are removed by simple pulling to free all the surfaces of the volume and allow cleaning and complete disinfection of said surfaces.

According to a particular method of manufacture of the invention, the side planes of the inner casing receive on their outer face and inside the residual free volume, a plurality of magnetic assemblies attached to certain suitable and compatible places, for receive opposite on each plane and by simple magnetic attraction on the inner surface of these planes inside the volume of the inner envelope, at least one upright preferably of a height close to that of said side planes, provided with at at least one support block to receive support at least one shelf. Thus, the shelf is lifted and removed and the uprights are detached from the surfaces of the volume by simple traction, freeing all the interior surfaces of said volume to allow them to be cleaned and fully disinfected.

The following description with reference to the accompanying drawings by way of non-limiting examples will make it easier to understand how the invention can be put into practice.

schematically represents the two dissociated envelopes in lateral section.

schematically shows the cabinet of the invention in side section.

schematically shows the cabinet of the invention in section and in top view.

schematically shows the cabinet of the invention in partial section seen from above, part of which shows a shelf placed on the upright support stops and the other part the method of installation of said uprights.

schematically shows the cabinet of the invention in partial sectional front view, one part of which shows a shelf installed on the upright stops and the other part shows the method of installation of said shelf.

schematically shows the cabinet of the invention in side section, the residual free space being equipped with heating elements.

shows schematically and in top view the cabinet of the invention, the front plane connecting the outer casing and the inner casing being equipped on its inner surface with magnetic assemblies to cooperate with the magnetic assemblies of the magnetic door closing the interior volume of the inner envelope.

shows in perspective the clean radii of the connecting edges of the three peripheral planes together as well as the connecting edges of the latter with the upper plane and the lower plane of the inner casing.

schematically represents in perspective the clean radius of the connecting edges of the three peripheral planes between them as well as the connecting edges of the latter with the upper plane and the lower plane of the inner envelope, said clean radius extending beyond the access plan by a corner leg.

According to the preferred manufacturing method of the invention, the refrigerated or heated cabinet called hygienic cabinet (100) is preferably made of metal and more precisely of stainless steel, preferably in the shape of a regular polyhedron such as a hexahedron. or cube or even an irregular polyhedron such as a rectangular parallelepiped. It consists on the one hand of a first structure called outer envelope (110) of interior volume (V1) inside which is preferably centrally arranged a second structure preferably of identical shape and of identical or similar material called envelope interior (120) of interior volume (V2), the hygienic unit (100) is made accessible or inaccessible by means of a door with non-apparent, sealed and insulated magnetic joints called magnetic door (200).

According to this preferred method of manufacture of the invention, the outer casing (110) consists of two superposed rigid planes including an upper plane called the high plane (111) and a lower plane called the low plane (112), separated from each other by three successive peripheral planes, perpendicular and joined by their free sides to the corresponding sides of the top plane (111) and the bottom plane (112), including a plane called the bottom plane (113) and two opposite planes called the side planes (114) and (115), so as to leave a free access plane called outer envelope access plane (116) to its interior volume (V1).

According to this preferred method of manufacture of the invention, the inner casing (120) consists of two superposed rigid planes including an upper plane called upper plane (121) and a lower plane called lower plane (122) separated from each other by three successive peripheral planes, perpendicular and secured by their sides to the corresponding sides of the upper plane (121) and the lower plane (122), including a plane called the end plane (123) and two opposite planes called the side planes (124) and ( 125), so as to leave a common free access plan called inner envelope access plan (126) to its interior volume (V2).

According to the preferred method of manufacture of the invention, the outer surfaces of the outer casing (110) are the surfaces of the top plane (111), bottom plane (112), bottom plane (113), side planes (114) (115) and face plane (117) oriented towards the external environment of the hygienic cabinet (100) and the interior surfaces of the outer casing (110) are the surfaces of the top plane (111), bottom plane (112), bottom plane (113), side planes (114) (115) and front plane (117) oriented towards the interior of the residual free space (V1r).

According to the preferred method of manufacture of the invention, the outer surfaces of the inner shell (120) are the surfaces of the upper plane (121), lower plane (122), end plane (123) and side planes (124 ) (125), facing the interior of the residual free space (V1r) and the interior surfaces of the interior envelope (120) are the surfaces of the upper plane (121), lower plane (122), end plane (123), side planes (124) (125) oriented towards the interior volume (V2) of the interior casing (120).

According to this preferred method of manufacture of the invention, the connection edges of the three peripheral planes (123) (124) (125) between them as well as the connection edges of the latter with the upper plane (121) and the lower plane (122) of the inner casing (120), have over their entire length a so-called cleanliness radius (127) of suitable dimensions to prevent the accumulation of dust, dirt and various dirt and to facilitate cleaning and disinfection of the interior volume (V2) of the inner casing (120).

According to a different manufacturing method of the invention, the connecting edges of the side planes (124) (125) with the upper plane (121) and the lower plane (122) of the inner casing (120), present on their entire length, a so-called cleanliness radius (127) of suitable dimensions to prevent the accumulation of dust, dirt and various types of dirt and to facilitate the cleaning and disinfection of the interior volume (V2) of the interior envelope (120), said cleanliness radius (127) extending outside the access plane (126) of the inner casing (120) and over a precise length, being obtained by the method of manufacture to form at each corner of said access plane (126) an integrated metal leg called corner leg (128). Said corner lugs (128) extending beyond the access plane (126) of the inner casing (120) the cleanliness shelves (127) interconnecting the side planes (124) (125), upper plane ( 121) and lower plane (122) of said inner casing (120), allow by their shape in arc of a circle of radius equivalent to that of the cleanliness radii (127), the rapid installation and the maintenance in position of a joint sealing around and outside the access plane (126) of the inner casing (120), facing the magnetic door (200), closing said access plane (126).

According to the preferred method of manufacture of the invention, the inner casing (120) is placed and immobilized preferably in the center of the inner volume (V1) of the outer casing (110) so as to constitute around the inner casing (120) a residual free space (V1r) between the outer face of the inner casing (120) and the inner face of the outer casing (110). Said residual free space (V1r) is closed between the outer envelope (110) and the inner envelope (120) on the coincident access plane (116) (126) of the two envelopes (110) (120), by a peripheral plane called face plane (117).

According to the preferred method of manufacture of the invention, the interior surfaces of the upper plane (121), lower plane (122), end plane (123) and side planes (124) (125) of the inner casing (120 ) constituting the volume (V2), are free of any deformation, any relief, any arrangement and/or presence of accessory or integrated or attached equipment likely to retain dust, impurities, stains, dirt and/or hinder cleaning and total disinfection of the interior volume (V2) of the interior envelope (120).

According to the preferred method of manufacture of the invention, the inner surfaces of the top plane (111), bottom plane (112), bottom plane (113), side planes (114) (115) of the outer casing (110) and of the face plane (117) are covered with a thermal insulating material, for example polyurethane foam, rock wool or any other thermal insulation suitable for the intended use of the hygienic cabinet, the outer surfaces of the upper planes (121) , lower plane (122), end plane (123) and side planes of (124) (125) of the inner casing (120) remains bare and without thermal insulation to optimize thermal conductivity.

According to this preferred method of manufacture of the invention, the residual free space (V1r) accommodates between the insulated inner surfaces of the outer casing (110) and the uninsulated outer surfaces of the inner casing (120), at a precise location and for example between the bottom plane (113) and the end plane (123), the evaporator (160) of a commonly used refrigeration installation called the Carnot Cycle, the other functional elements of which are: a compressor (140), a condenser (150), an expander (not shown) and certain connecting pipes, are located outside the outer casing (110) and preferably close to the bottom plane (113) thereof. ci, preferably facing the evaporator (160).

According to this preferred method of manufacture of the invention, the evaporator (160) is made in the form of a compact block, placed inside the closed residual free space (V1r) between the insulated interior surfaces of the outer envelope (110) and the non-insulated outer surfaces of the inner envelope (120), at a specific location and for example between the bottom plane (113) and the end plane (123). The air contained in the space (V1r) then cools on contact with the evaporator (160) and is driven inside said space (V1r), by means of at least one ventilation device integrated into said evaporator ( 160) to thus cause a mixing enveloping all the walls of the inner envelope (120) and thus optimize the exchange surface and the uniformity of the desired temperature.

According to another method of manufacture of the invention, the evaporator (160) is placed inside the closed residual free space (V1r) between the insulated inner surfaces of the outer casing (110) and the outer surfaces not isolated from the inner casing (120), at a specific location and for example between the bottom plane (113) and the end plane (123). The air contained in the space (V1r) then cools on contact with the evaporator (160) and starts moving inside said space (V1r), by natural convection the cold air falling downwards and the hot air rising upwards, thus enveloping all the walls of the inner envelope (120). This embodiment of the invention is rather reserved for equipment requiring only low cooling capacities.

According to a different manufacturing method of the invention, the residual free space (V1r) between the insulated inner surfaces of the outer casing (110) and the non-insulated outer surfaces of the inner casing (120), has a or several suitable and compatible precise locations and for example between the bottom plane (113) and the end plane (123), of at least one heating element (165) and preferably of at least one heating resistor. The air contained in the residual free space (V1r) then heats up on contact with said heating element (165) and moves inside said residual free space (V1r), driven naturally or by an attached ventilation device, generating thus a mixing enveloping all the walls of the inner casing (120) and optimizing the exchange surface and the desired temperature uniformity.

According to the preferred manufacturing method of the invention, the residual free space (V1r) between the insulated inner surface of the outer casing (110) and the uninsulated outer surface of the inner casing (120), has several suitable and compatible specific locations and in particular integrally with the inner surface of the front plane (117) and preferably facing each of the two side planes (124) (125) of the inner casing (120), of magnetic assemblies consisting one or more magnets associated or separated from each other, to cooperate by simple magnetic attraction with the magnetic assemblies of the magnetic door (200) closing the access plane (126) of the inner casing (120).

According to the preferred method of manufacture of the invention, the residual free space (V1r) between the insulated inner surfaces of the outer casing (110) and the uninsulated outer surfaces of the inner casing (120), has several suitable and compatible specific locations, of magnetic assemblies (170) consisting of one or more magnets associated or separated from each other, preferably secured to the outer surface of at least one of the upper plane (121), lower plane (122), end plane (123) and side planes (124) (125) of the inner casing (120), to allow receiving added by simple magnetic attraction and in correspondence on the inner surface of these planes (121) (122) (123) (124) (125) and inside the volume (V2) of the inner casing (120), a plurality of removable accessories such as uprights, wedges, stops, shelves, rails, etc. Thus, said accessories are removed by simple pulling to free all the surfaces of the volume (V2) and allow them to be cleaned and fully disinfected.

According to a particular method of manufacture of the invention, the side planes (124) (125) of the inner casing (120) receive on their outer face and inside the closed residual free volume (V1r), a plurality magnetic assemblies (170) added to certain suitable and compatible places, to receive by simple magnetic attraction and facing each plane and on the inner surface of these planes (124) (125) inside the volume (V2) of the inner casing (120), at least one upright (180) preferably of a height close to that of said side planes (124) (125), provided with at least one support wedge (185) to receive abutment on the least one shelf (190). Thus, the shelf (190) is lifted and removed and the uprights (180) are detached from the surfaces of the volume (V2) by simple traction, releasing all the interior surfaces of said volume (V2) to allow them to be cleaned and fully disinfected.

Claims (10)

Hygienic furniture with invisible magnetic articulation and space with a heating or cooling double envelope, characterized in that it consists of two envelopes including an outer envelope (110) of interior volume (V1) and an interior envelope (120) of interior volume ( V2), the inner envelope (120) being placed and immobilized in the center of the inner volume (V1) of the outer envelope (110), so as to constitute around the inner envelope (120), a residual free space ( V1r) closed by a face plane (117), between on the one hand the outer faces of the inner envelope (120) and on the other hand the inner faces of the outer envelope (110), said closed residual free space (V1r) being on the one hand subjected to hot or cold temperature and on the other hand provided on the outer surfaces of the inner casing (120) and/or the inner surface of the face plane (117) with a plurality of magnetic elements (170) to allow the magnetic attraction of the magnetic door (200) and/or added accessories, the interior surfaces of the upper plane (121), lower plane (122), end plane (123) and side planes (124) (125) of the interior volume (V2) of the interior casing (120) being free of any deformation, any relief, any arrangement and/or the presence of integrated or attached accessories or equipment likely to retain dust, impurities, dirt, dirt and/or impede cleaning and disinfection of the interior volume (V2) of the interior casing (120). Hygienic furniture with concealed magnetic articulation and heating or cooling jacketed space according to claim 1, characterized in that the interior surfaces of the top plane (111), bottom plane (112), bottom plane (113), side planes (114 ) (115) of the outer casing (110) and the face plane (117) are covered with a thermally insulating material, in particular polyurethane foam, rock wool or any other thermal insulation suitable for the intended use of the furniture hygienic, the outer surfaces of the upper plane (121), lower plane (122), end plane (123) and side planes of (124) (125) of the inner casing (120) remaining bare and without insulation to optimize thermal conductivity. Hygienic cabinet with concealed magnetic joint and heating or cooling jacketed space according to Claims 1 and 2, characterized in that the residual free space (V1r) accommodates between the insulated inner surfaces of the outer casing (110) and the outer surfaces not isolated from the inner casing (120) and at a precise location and in particular between the bottom plane (113) and the end plane (123), the evaporator (160) of a commonly used refrigeration installation called of the Carnot cycle, the other functional elements of which, namely: a compressor (140), a condenser (150), an expansion valve (not shown) and certain connecting pipes, are located outside the outer casing (110) and close to the bottom plane (113) thereof, in particular facing the evaporator (160). Hygienic cabinet with concealed magnetic joint and heating or cooling jacketed space according to any one of Claims 1 and 3, characterized in that the evaporator (160) is made in the form of a compact block, placed inside of the closed residual free space (V1r) between the insulated inner surfaces of the outer casing (110) and the non-insulated outer surfaces of the inner casing (120) and at a precise location and in particular between the bottom plane ( 113) and the end plane (123), the air contained in the space (V1r) then cooling in contact with the said evaporator (160) and being animated inside the said space (V1r), by natural convection the cold air falling downwards and hot air rising upwards or by means of at least one ventilation device integrated into said evaporator (160) to cause mixing enveloping all the walls of the inner envelope (120) and to optimize thus the exchange surface and the desired temperature uniformity. Hygienic cabinet with concealed magnetic joint and heating or cooling jacketed space according to Claim 1, characterized in that the closed residual free space (V1r) between the insulated inner surfaces of the outer jacket (110) and the outer surfaces not insulated from the inner casing (120), has at one or more specific suitable and compatible locations and in particular between the bottom plane (113) and the end plane (123), at least one heating element (165), the air contained in the residual free space (V1r) then heating up in contact with said heating element (165) and moving inside said closed residual free space (V1r), driven naturally or by an attached ventilation device, to cause a mixing enveloping all the walls of the inner envelope (120) and thus optimize the exchange surface and the uniformity of the desired temperature. Hygienic cabinet with concealed magnetic joint and heating or cooling jacketed space according to Claim 1, characterized in that the residual free space (V1r) between the insulated inner surface of the outer jacket (110) and the uninsulated outer surface of the inner casing (120), has at several specific suitable and compatible locations, in particular integrally with the outer surface, at least one of the upper (121), lower (122), side planes (124) (125) and/or on the inner surface of the face plane (117) of the inner casing (120) and preferably facing each of the two side planes (124) (125) of the inner casing (120), magnetic assemblies (170) consisting of one or more magnets associated or separated from each other, to cooperate by simple magnetic attraction with the magnetic assemblies of the magnetic door (200) closing the access plane (126) of the interior envelope ( 120). Hygienic cabinet with concealed magnetic joint and heating or cooling jacketed space according to claim 1, characterized in that the residual free space (V1r) between the insulated inner surfaces of the outer jacket (110) and the uninsulated outer surfaces of the inner casing (120), has at several specific suitable and compatible locations, magnetic assemblies (170) consisting of one or more magnets associated or separated from each other, secured to the outer surface of at least one of the planes upper (121), lower plane (122), end plane (123) and side planes (124) (125) of the inner casing (120), to allow receiving reported by simple magnetic attraction and in correspondence on the inner surface of these planes (121) (122) (123) (124) (125) and inside the volume (V2) of the inner casing (120), a plurality of removable accessories such as uprights, wedges , stops, shelves, rails, etc. said accessories being removed by simple traction to free all the surfaces of the volume (V2) and allow them to be cleaned and fully disinfected. Hygienic furniture with concealed magnetic articulation and heating or cooling jacketed space according to claims 1 and 7, characterized in that the side planes (124) (125) of the inner casing (120) receive on their outer face and at inside the residual free volume (V1r), a plurality of magnetic assemblies (170) attached to certain suitable and compatible locations, to receive by simple magnetic attraction and opposite on each plane and on the inner surface of these planes (124 ) (125) inside the volume (V2) of the inner casing (120), at least one upright (180) in particular of height close to that of said side planes (124) (125), provided with at at least one support wedge (185) to receive at least one shelf (190) in support, the shelf (190) being lifted and withdrawn and the uprights (180) being detached from the surfaces of the volume (V2) by simple traction, releasing all the interior surfaces of said volume (V2) to allow their cleaning and their complete disinfection. Hygienic furniture with concealed magnetic articulation and heating or cooling jacketed space according to claim 1, characterized in that the connecting edges of the three peripheral planes (123) (124) (125) between them as well as the connecting edges of these last with the upper plane (121) and the lower plane (122) of the inner casing (120) have over their entire length, a so-called cleanliness radius (127) of dimensions adapted to avoid the accumulation of dust, dirt and various types of dirt and facilitate the cleaning and disinfection of the interior volume (V2) of the interior casing (120). Hygienic furniture with concealed magnetic articulation and heating or cooling jacketed space according to Claim 1, characterized in that the connecting edges of the side planes (124) (125) with the upper plane (121) and the lower plane (122 ) of the inner casing (120), have over their entire length, a so-called cleanliness radius (127) of suitable dimensions to avoid the accumulation of dust, dirt and various dirt and to facilitate cleaning and disinfection of the interior volume ( V2) of the inner casing (120), said cleanliness radius (127) extending outside the access plane (126) of the inner casing (120) and over a precise length, being obtained by the manufacturing method for forming at each corner of said access plane (126) an integrated metal tab called a corner tab (128), said corner tabs (128) extending beyond the access plane (126) of the inner casing (120 ) the cleanliness spokes (127) which interconnect the side planes (124) (125), upper plane (121) and lower plane (122) of said inner envelope (120), allowing by their arcuate shape to radius equivalent to that of the cleanliness spokes (127), the rapid installation and maintenance in position of a seal (129) around and outside the access plane (126) of the inner envelope (120), opposite the magnetic door (200), closing said access plane (126).