EP2439467A2 - Elément de refroidissement par sorption - Google Patents

Elément de refroidissement par sorption Download PDF

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Publication number
EP2439467A2
EP2439467A2 EP11007777A EP11007777A EP2439467A2 EP 2439467 A2 EP2439467 A2 EP 2439467A2 EP 11007777 A EP11007777 A EP 11007777A EP 11007777 A EP11007777 A EP 11007777A EP 2439467 A2 EP2439467 A2 EP 2439467A2
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EP
European Patent Office
Prior art keywords
evaporator
cooling element
cooling
sorbent
working fluid
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.)
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EP11007777A
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German (de)
English (en)
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EP2439467A3 (fr
Inventor
Peter Dr. Maier-Laxhuber
Ralf Dr. Schmidt
Andreas Becky
Manfred Binnen
Gert Richter
Norbert Weinzierl
Reiner Dipl.-Ing. Wörz
Bianca Berrang
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Zeo Tech Zeolith Technologie GmbH
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Zeo Tech Zeolith Technologie GmbH
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Application filed by Zeo Tech Zeolith Technologie GmbH filed Critical Zeo Tech Zeolith Technologie GmbH
Publication of EP2439467A2 publication Critical patent/EP2439467A2/fr
Publication of EP2439467A3 publication Critical patent/EP2439467A3/fr
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B17/00—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type
    • F25B17/08—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type the absorbent or adsorbent being a solid, e.g. salt
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D5/00—Devices using endothermic chemical reactions, e.g. using frigorific mixtures
    • F25D5/02—Devices using endothermic chemical reactions, e.g. using frigorific mixtures portable, i.e. adapted to be carried personally
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D31/00—Other cooling or freezing apparatus
    • F25D31/006—Other cooling or freezing apparatus specially adapted for cooling receptacles, e.g. tanks
    • F25D31/007—Bottles or cans

Definitions

  • the invention relates to sorption cooling elements for cylindrical vessels with a gas-tight multilayer film for cooling vessels in which is produced by evaporation of a working fluid and sorption of the working fluid vapor in a sorbent under vacuum cold and method for producing and starting these cooling elements.
  • Adsorption devices are devices in which a solid adsorbent sorbs a second, boiling at lower temperatures, the vaporous working medium, under heat release (sorption). The working fluid evaporates in an evaporator while absorbing heat.
  • Adsorption apparatus for cooling with solid sorbents are from EP 0 368 111 and the DE-OS 34 25 419 known. Sorbent container, filled with sorbents, thereby absorb working agent vapor, which is produced in an evaporator, and sorb it under heat release. This sorption heat must be removed from the sorbent.
  • the chillers can be used to cool and keep food warm in thermally insulated boxes.
  • the WO 01/10738 A1 describes a self-cooling beverage can with an evaporator inside and a sorber outside the can.
  • the cooling is started by opening a steam channel between evaporator and sorber.
  • the cold generated in the evaporator is discharged through the surfaces of the drink to be cooled within the can.
  • the heat generated in the sorbent is stored in a heat buffer.
  • the self-cooling beverage can is heavily modified over an ordinary can and expensive to manufacture.
  • the mass ratio between sorbent and PCM is 1: 1.5; i.e. to a mass of 100 g of active sorbent, add 150 g of PCM.
  • the total mass is thus 250 g.
  • the maximum amount of refrigerant that can be generated amounts to 37 KJ. Even if this amount of refrigerant would be transferred lossless on a drink, so that a can with 330 ml content can be cooled by a maximum of 27 K. Consequently, in all known technical solutions, the additional volume and additional weight almost reach that of the beverage to be cooled. The cost of cooling thus easily exceed the cost of the drink.
  • the US Pat. No. 6,474,100 B1 finally describes a self-cooling cooling element on the outside of a bag for liquids or bulk materials.
  • the sorbent is enclosed in a flexible, multi-layered film.
  • the contact with the hot sorption filling is reduced to a minimum by insulation and flow materials as well as by heat storage masses lying between them.
  • the temperature compensation between the hot sorber filling and the cold evaporator, which are opposed over a large area, must be reduced by an elaborate insulation.
  • the EP 08008007 describes cooling elements for cooling a glass bottle from 25 ° C to 10 ° C within a period of 20 minutes.
  • the working fluid is introduced in two separate subsets. Cooling is possible twice.
  • the glass bottle can be separated from the cooling element.
  • the object of the invention are cost-effective sorption cooling elements and methods for their preparation and for cooling.
  • the cooling element according to the invention does not use heat storage materials.
  • the released heat of adsorption is rather buffered in an amount of sorbent at least four times excessive.
  • the cooling elements can cool not only once but at least four times in succession, provided that heat is transferred to the environment in between.
  • an inventive Cooling system can be cooled four beverage cans.
  • To cool four beverages with the prior art four separate refrigeration systems are necessary.
  • the invention thus saves the entire, additional heat storage mass, three evaporator structures, three valves and the necessary connection and insulation elements. Based on the cooled beverage volume, this means a significant material and cost savings.
  • the user is also free to select and cool the beverage can to be cooled himself. Vessel and cooling do not form an indivisible unit in the invention.
  • the sorbent, the evaporator and the feed device are enveloped by a multilayer film.
  • the evaporator contains at least one fleece and a flexible, vapor-permeable structural material. Both together form under vacuum a smooth as possible, flexible design that can be pressed accurately and large area of the vessel to be cooled.
  • the structural material distributed at the start of cooling the liquid working fluid over a large area in the fleece and directs the working medium vapor in the sorbent.
  • the structural material leaves open a flow cross section which is dimensioned such that the working medium in the nonwoven fabric can not normally freeze during the cooling process. This is especially important when working with water. Ice significantly reduces the heat transfer from the vessel to the evaporator.
  • the evaporator By using a structural material that can be produced at low cost, on the one hand, a flexible construction of the evaporator can be realized, which can be optimally adapted to particular cylindrical geometries.
  • the necessary flow channel from the evaporator to the sorbent can be realized in the required cross-section.
  • the flow cross-section In order to achieve a sufficiently rapid cooling, the flow cross-section must have at least an area of 1 cm 2 . at Water as a working medium can thus be achieved a cooling capacity of up to 50 watts.
  • the multi-layer film used for the gastight vacuum envelope encloses all components necessary for operation and storage time. It can be manufactured in one piece and allows the necessary bending freedom under vacuum to the internal flexible components. With an aluminum barrier layer in the multilayer film, storage times of more than two years are possible without an excessively large amount of gas diffusing through the film during this period.
  • the evaporator surface of the cooling element is pressed onto the outer surface of the vessel according to the invention.
  • the evaporator is designed to be flexible and pressed the cold evaporator surface by means of separate, elastic pressing means flat on the outer surface of the liquid container to use a large part of the sometimes structured surface of the container for heat exchange.
  • Suitable pressing agents are, for example, detachable adhesive tapes, rubber bands or hook-and-loop fasteners of any kind.
  • plastic structural materials can advantageously be used, which are adapted to the respective cooling task.
  • the prerequisite is, however, that the structural materials do not outgas during the storage time and thereby impair the vacuum.
  • polycarbonate (PA), polyethylene terephthalate (PET) or polypropylene (PP) are used, since these materials were heated to higher temperatures before and during the manufacturing process and thereby degassed.
  • Plastic structural materials can be inexpensively manufactured by the usual manufacturing techniques such as deep drawing, extruding, weaving or blowing.
  • Extruded meshes and meshes of polypropylene which are used in one or more layers, have proven to be particularly effective, on the one hand providing the necessary flexibility with respect to deformation and, on the other hand, providing rigidity against the air pressure applied from outside over the multilayer film.
  • Particularly suitable polypropylene structural materials are sold by Tenax Germany.
  • the product OS 102 is a rhomboidal grid that leaves ideal geometries open for the lattice-plane working fluid vapor and the externally applied multi-layer film is supported. Single or multi-layer layers of this grid can be used particularly advantageous as a structural material.
  • a stabilizing cover plate can likewise be inserted in order to bridge over too long carrier spacings of the structural material with respect to the outer atmospheric pressure.
  • PP films having a thickness of approximately 0.5 mm have proven to be suitable for the cover plate.
  • the structural material should consist of one piece and fulfill all supporting functions self-supporting.
  • vessels all common containers such as bottles, cans, barrels, bags, jugs, etc. are understood, which serve to hold liquids such as drinks, medicines but also chemical products.
  • the vessel may also contain solid or free-flowing products. Basically it does not have to be changed compared to its usual form and equipment. Thus, all previously common manufacturing processes, filling devices and distribution channels for the vessels can be kept unchanged.
  • the evaporator together with the internal structural material and fleece is pressed around the cylindrical outer jacket of the vessels. Since the inner radius of the all-enveloping multilayer film is thus smaller than the outer radius, it is particularly important to ensure that the resulting difference between the outer and inner circumference of the film geometry is recorded. In order to avoid wrinkles along the shorter inner circumference, the foil blank along the vessel sheath is made segmentally wider than would be geometrically necessary. The supernatant film material can then compensate for the length differences by folding in this area. The relevant contact surfaces for the heat transfer remain wrinkle-free. These compensation surfaces to accommodate the differences in length can be turned over in the course of the manufacturing process in less disturbing or non-visible areas.
  • Sorbents can reach temperatures of over 100 ° C during the sorption process. For such high temperatures, the multilayer films commonly used in the packaging sector are less suitable. In particular, the polyethylene layers frequently used for sealing become soft even at 80 ° C and leave the shell Be leaking under vacuum. Polypropylene sealing layers, on the other hand, can withstand significantly higher temperatures. Its melting point is above 150 ° C. At higher temperatures, sharp edges on the sorbent and structural material can easily lead to inadmissible leaks. This risk can be met according to the invention by polyamide and / or polyester sheaths within the multilayer film. Polyester and polyamide films are particularly tear and puncture resistant. The actual gas barrier is ensured by a layer of thin metal foils or metallized layers.
  • Thin aluminum foils with a layer thickness of 7 ⁇ m and above have proven to be suitable for this purpose. Less dense are metallized plastic films. Nevertheless, with short storage periods, the use of these metallized films is possible, especially since they are cheaper compared to the metal foils.
  • the individual layers of a multilayer film are bonded together by adhesive.
  • Commercially available adhesives contain solvents which are not completely removed from the adhesive layer during bonding. Over long periods of time, these solvents then diffuse through the internal layers, particularly the polypropylene layer, and affect the vacuum within the cooling element. The diffusion is enhanced at higher temperatures, such as occur in the sorption and manufacturing process of the cooling elements.
  • the adhesive used must therefore also be designed for high temperatures and vacuum.
  • multilayer films with polyester or polyamide layer thicknesses of 12 to 50 ⁇ m, an aluminum layer thickness of at least 7 ⁇ m and a polypropylene layer thickness of 50 to 100 ⁇ m are used. Use find such films z. As in the packaging of foods that are sterilized after packaging for preserving at temperatures of about 120 ° C. Even more stable multilayer films are obtained when a further approximately 15 microns thick polyester or polyamide layer is bonded between the aluminum and the polypropylene layer. Sharp or pointed sorbent particles then can not penetrate to the gas barrier, the aluminum layer.
  • Inventive multilayer films are z. B. via the companies Cellpack, Switzerland or Pawag, Austria.
  • cooling elements with a leakage rate of less than 1x10 high-7 mbarl / sec are possible.
  • the shelf life thus reaches several years, without the cooling effect is limited.
  • the sorbent used is advantageously zeolite. This can reversibly sorb in its regular crystal structure up to 36% by mass of water. In the application according to the invention, the technically feasible water absorption is between 16 and 20 percent by mass, since the sorbent is not filled in completely dry. In practice, a moisture content of more than 3 percent by mass is to be assumed before the first cooling step.
  • the sorbent with water vapor of about 7 mbar (evaporator temperature about 1 ° C) in contact. Zeolites adsorb under heat release water vapor to thermodynamic equilibrium. The equilibrium is reached when the maximum zeolite temperature reached under the prevailing vapor pressure.
  • the first cooling step commercially available zeolites without heat removal and under 7 mbar steam pressure heated to a maximum of 125 ° C.
  • the maximally adsorbable amount of water vapor is then 4% by mass. Together with the initial load, this results in an intermediate load of about 7 percent by mass.
  • the next adsorption phase can be started. Again, the temperature rises, but only to about 98 ° C.
  • the amount of adsorbed water vapor is but again about 4 percent by mass.
  • less adsorption could be buffered in the sorbent (heating only to 98 ° C and not to 125 ° C), also about 4 percent by mass of water vapor are adsorbed.
  • the zeolite mass for 8 vessels of 648g is divided into eight conventional, self-cooling beverage cans. The then additionally necessary heat buffer mass adds up to nearly 1kg.
  • zeolite can absorb a maximum of 4% by mass without additional heat buffering.
  • One after the other (with intermediate cooling) at least four coolings are possible, so that together at least 16% by mass of water vapor adsorption can be realized.
  • the necessary amount of water to be evaporated is calculated. This amount of water can then amount to a maximum of 4% of the zeolite.
  • the minimum amount of zeolite is easy to calculate. For at least four coolings is then always sufficient sorbent available.
  • Zeolite is a crystalline mineral that consists of a regular skeletal structure of silicon and aluminum oxides. This framework structure contains cavities in which water molecules can be sorbed by releasing heat. Within the scaffold structure, the water molecules are exposed to strong field forces whose strength (and thus the heat of adsorption) of the already contained in the scaffold structure Amount of water and the temperature of the zeolite depends.
  • synthetic zeolite types especially the types A, X and Y are used, each in their inexpensive Na form.
  • zeolites For all types of zeolites, there is a risk that, depending on the synthesis processes and starting materials, they contain admixtures which release gaseous constituents in a vacuum, and in particular at elevated temperatures, which influence the cooling process.
  • the problem of gas release is solved by the fact that zeolites are heated in the manufacture of the cooling element at least to the later sorbent temperature and at the same time placed under the then prevailing vacuum. In this procedure, zeolites can release their interfering constituents according to the invention. This thermal treatment is particularly efficient if at the same time the presorbed water can be evaporated off.
  • the gas-tight multilayer films with an inner polypropylene layer and at least one polyester layer are used according to the invention.
  • the sorbent amount is to be arranged so that only a minimal pressure drop within the sorbent must be overcome for the incoming water vapor.
  • the pressure drop should be less than 5 mbar, in particular for water as working fluid.
  • the sorbent must provide the inflowing agent vapor sufficient surface for attachment.
  • particularly sorbent granules have been proven. Granule diameters between 3 and 10 mm show the best results. These are easy to pack in multilayer films. After evacuation, they form a hard, pressure and dimensionally stable sorption container that retains the shape required for evacuation.
  • zeolite powder preformed, stable zeolite blocks in which the flow channels are incorporated and whose shape is adapted to the desired cooling element geometry.
  • the stable zeolite blocks may have voids in the region of the later steam opening to the flow not obstructed by the steam channel.
  • the heat of adsorption is discharged through the film to the outside.
  • the heat will be dissipated to the surrounding air.
  • It is also very efficient to cool the sorption container by means of liquids, in particular with water. The waiting time before the following cooling process can thus be shortened.
  • the heat transfer to an air flow from the outside of the multilayer film is of the same order of magnitude as the heat transfer of a sorbent granulate to the inside of the film, in principle large film surfaces without ribbing are recommended, for example in cylinder, plate or tube geometries.
  • the sorption containers are to be designed so that the average heat conduction within the sorbent does not exceed 5 cm.
  • thermal insulation can be combined with the pressing means.
  • Insulation materials often have a resilient restoring force against compression.
  • This restoring force can be used according to the invention as a resilient compensation medium in order to distribute pressure forces applied on one side more uniformly to the entire evaporator contact surface.
  • the working fluid can be distributed at least to four individual bags, since the amount of sorbent can adsorb at least four times until the maximum loading width is reached.
  • the entire working fluid can be stored in only one reservoir within the feeding device.
  • the individual subsets must then be divided with other dosing techniques known in principle.
  • the feeding device can be carried out particularly expediently if the filling and emptying valves contained therein are actuated by the already necessary actuation of the pressing means.
  • the vaporizer may be loaded with the sorbent within a single, all-enveloping, multilayer film. Only when the liquid working fluid flows from the feed device to the evaporator, it can evaporate from there and continue to flow vapor to the sorbent. It is even more advantageous if only a relatively small flow cross-section is required for the liquid working medium.
  • a disadvantage is that the working fluid must sufficiently homogeneously wet the evaporator without being entrained in liquid form in the sorber or even on exiting the opening of the working fluid bag to ice and thus to block the further inflow.
  • a homogeneous distribution of the working fluid can be achieved according to the invention by a separate, finely branched channel structure, which distributes the working fluid after flowing out of the feed device homogeneously, before it could be entrained liquid by the steam flow.
  • An inexpensive distribution can e.g. be achieved by a layer of finely delaminated film which is arranged around the outlet opening.
  • a particularly efficient and at the same time cost-effective solution is achieved when the liquid working fluid is homogeneously distributed through the structural material of the steam channel in the evaporator fleece.
  • the working fluid is pressed into the structural material after the feed device has been opened by the overpressure acting from outside on the multilayer film.
  • a part of the working fluid evaporates and tears the still liquid working fluid at high speed.
  • shaping of the structural material the liquid working fluid is deflected several times on the way to the sorbent and thrown repeatedly against the adjacent nonwoven material. This absorbs the liquid components of the working fluid and fixes this against the inflowing agent vapor.
  • the evaporator fleece is wetted in a very short time homogeneously with the optimum amount of working fluid.
  • the transport of the liquid working fluid is therefore not within the evaporator fleece but via the steam channel within the structural material.
  • the evaporator is flooded from its one end with the liquid working fluid while the pure working medium vapor flows out of the evaporator at the other, far end.
  • the evaporator does not necessarily have to be upright.
  • the feed of the liquid working fluid can also take place from above while the working medium vapor flows out from below.
  • the amount of evaporator fleece is to be adjusted to the volume of the liquid working medium.
  • the area of the evaporator fleece which is in contact with the vessel to be cooled, recorded the necessary amount of working fluid and evenly distributed. But that does not mean that the fleece itself must be distributed homogeneously. In particular, it may be made thinner in the dosing device. Forcibly guided, the entire working fluid flows through this area. This also moisturizes the structural material, the knitted fabric and other fixtures. To ensure even cooling, the fleece can be thinned out at these areas. Consequently, the fleece can also be made thicker at other locations. In particular, where the vessel can deliver more heat by internal, thermal redistribution, this measure increases the cooling rate.
  • the working medium is distributed and fixed in the fleece by capillary forces or hygroscopic effects.
  • Particularly inexpensive nonwoven materials contain absorbent papers, as they are used in a wide variety for household and industrial for absorbing liquids.
  • Particularly absorbent nonwovens consist of polypropylene microfibers. Equipped with special wetting agents, they can absorb and fix a multiple of their own weight in water.
  • the manufacturing method for cooling elements according to the invention can proceed as follows. In a pre-sealed tube made of multilayer film, all evaporator components including the feed device are inserted at defined positions. Even before the evacuation, the evaporator area of the geometry of the vessel to be cooled is reshaped. Thereafter, hot sorbent is filled and the cooling element evacuated either in the vacuum chamber or at atmospheric pressure by means of a suction adapter and then sealed.
  • the sealing of the multi-layer film is usually carried out by pressing hot welding bar on the outer surfaces of the film until the internally superimposed polypropylene layers are liquid and merge together.
  • welding processes using ultrasound have also proven successful.
  • the seal has a width of at least 5 mm even better but of 10 mm. The wider the sealed seam, the lower the leakage rate and consequently the longer the storage time of the cooling element.
  • Fig. 1 the main vacuum components of a cooling element are shown.
  • the cooling element is enveloped by a film tube of two multilayer films 1, 2.
  • the two multilayer films 1, 2 can already be cut to size prior to sealing according to the drawing.
  • a cover plate 4 In the area of the evaporator 3, a cover plate 4, a structural material 5 for keeping the steam flow channel free and a knitted fabric 6 made of PET fibers for smoothing a fleece 7 are inserted.
  • the two multilayer films 1, 2 come to lie each with their PP-sealing layer to each other. They are sealed along the two structured side seams 14 by means of non-drawn, hot sealing tools.
  • four compensation surfaces 13 are formed, which can accommodate 3 wrinkles formed during deformation of the evaporator.
  • the two narrow sides of the multilayer films 1, 2 initially remain unsealed.
  • eight water bags 8 are introduced together with a flow channel 9.
  • the water bags 8 are made of a peel-foil and filled with the working fluid water.
  • one of the four sealing seams can burst and the water content can be squeezed out due to the atmospheric pressure applied from the outside.
  • the water content is forwarded to the fabric 6 and distributed homogeneously in the region of the evaporator 3 from the nonwoven 7.
  • the hot zeolite 10 Through the left side opening can be filled after deformation of the evaporator 3, the hot zeolite 10.
  • Fig. 2 shows the loop-like deformation of the evaporator 3 on a cylindrical mold 12, which has the diameter of the later to be cooled vessels. Since the evaporator 3 before deformation already contains the non-visible components (cover plate 4, structural material 5, knitted fabric 6 and fleece 7), the radius of the outer multilayer film 2 is larger by about 3 mm than the radius of the inner multi-layer film 1. Since the Multilayer films 1, 2 are not stretchable, the imposed deformation inevitably leads to wrinkles in the region of the inner radius. In order to prevent the associated poorer heat transfer, the folds are moved in the region of the four compensation surfaces 13. The contact surfaces to the vessels thus remain completely wrinkle-free. By means not shown holding tools, the cooling element 20 is fixed in the drawn shape and position.
  • the eight water bags including flow channel 9 were inserted so that the flow fabric 9 is flush with the knit 6.
  • 750g, 180 ° C hot zeolite type 13X are filled through a hopper 15.
  • the rear side opening is then also sealed while the front side opening still remains open.
  • the hot zeolite material is then molded and fixed into the desired geometry within the multilayer films by means of hot, externally pressed dies (not shown).
  • the entire cooling element 20 together with the above-described forming and holding tools is placed in a vacuum chamber and evacuated for several minutes to a pressure below 6 mbar (abs.). Even in the vacuum chamber then the last still open side opening is sealed behind the water bags 8.
  • the finished, evacuated cooling element 20 now has a shape according to Fig. 3 ,
  • the evaporator 3 is formed after removal of the mold 12 to a flexible, laterally open, cylindrical shell. At both ends of the evaporator 3 is open and can easily accommodate the vessels to be cooled.
  • the folds are located in the folded compensation surfaces 13 along the cylinder outer shape.
  • the hot zeolite material 10 (not visible) is formed into a space-saving zeolite block 19 and communicates fluidically with the evaporator 13 over the entire width of the evaporator 3.
  • the eight water bags 8 together with the flow channel 9, the dosing. It is housed in the upwardly protruding hose end easily accessible.
  • Fig. 4 shows a suitable pressing means 27 in conjunction with a thermal insulation 26th
  • a thermal insulation 26th On a sealable film 21 tabs 22 are sealed on two opposite sides, in which two rods 23 can be threaded. The two parallel bars 23 are connected at one end by means of a wire 24 at a distance of a few millimeters.
  • the thermal insulation 26 consists of a first plan, about 7 mm thick plate of polystyrene, which is adhered to the flat film 21. If you roll this arrangement then over a form cylinder arises in Fig.
  • the insulation 26 can be pressed by means of the rods 23 on the evaporator 3.
  • the vessel can be easily removed again after cooling.
  • the lower rod 23 is pressed into a bore of a disc 31, while the upper rod 23 is guided in a sickle-shaped curved slot 32.
  • the disc 31 is positioned horizontally, so that the two bars 23 are pressed close to each other. If the disc 31 is rotated about the lower rod 23 in a vertical position (arrow A direction), the upper rod 23 runs upwardly within the slot 32 in the direction of arrow B.
  • the pressing force on the evaporator 3 is solved in this position.
  • the vessels to be cooled can be easily inserted and removed in this position. To activate the pressing force, only the disc 31 must be pivoted back to the left.
  • Fig. 5 shows a completed with pressing means 27 cooling element 20 in a sectional view.
  • the vessel 30 to be cooled, a commercial beverage can lies on the side, the gas bubble 35 of the beverage is located at the top.
  • the evaporator 3 is pressed by the insulation 26, which is surrounded by the film 21, by means of the two rods 23 over a large area on the jacket of the vessel 30.
  • the rods 23 press this pliers at the same time on the vapor discharge to the zeolite block 19 and the feed line from the water bags 8.
  • Water bag 8, flow channel 9, zeolite 10 and all internal evaporator components are enclosed by the multilayer films 1, 2.
  • the feed device 40 can be folded out.
  • the structural material 5 and the cover plate 4 are cut so long that they reach far into the zeolite 10.
  • the knitted fabric 6 and the nonwoven fabric 7 are cut so short that the liquid water can not flow into the connecting channel.
  • the knitted fabric 6 protrudes slightly beyond the evaporator surface in the direction of the water bag 8. This achieves a more even distribution of the water content flowing from the water bags 8 via the flow fabric 9.
  • Fig. 6 shows an alternative feed device 40 at the confluence with the evaporator 3.
  • the upper multilayer film 2, the rod 23 and the film of a foil bag 41 are shown transparent.
  • a large film bag 41 is filled with the entire amount of water in this embodiment.
  • a pressure-stable metering volume 42 is accommodated for a single metering amount of 14 ml.
  • the metering volume 42 has an access 43 within the foil bag 41 and a spout 44 outside of the foil bag 41.
  • the access 43 is provided with a flexible, thick-walled silicone tube 48, which opens inside the foil bag 41 and is open, unless it is additional, external Forces is squeezed.
  • Water from the foil bag 41 is therefore always pressed when the access 43 is open, by the upcoming atmospheric pressure from the foil bag 41 into the metering volume 42.
  • a spout 45 is formed, which is sealed gas-tight with the film of the film bag 42.
  • a silicone tube 46 is pushed onto a pipe socket 49, the second end, however, unlike the access 43, with a tight closing, cylindrical plug 47 is closed.
  • the feed device 40 is thus a separate item that can be filled and stored separately. In the design case, for a zeolite filling of 750 g, at least 112 g of water in the foil bag 41 are filled free of gas.
  • the two silicone tubes 46, 48 are so to the knit 6 of the evaporator 3, the rods 23 of the pressing means 27 come to lie transversely on the ends of the silicone tubes 46, 48. How out Fig. 7 can be seen (sectional view along the rods 23), squeeze the two rods 23 in the pressed state on the two ends of the silicone tubes 46, 48.
  • the silicone tube 48 is closed, the silicone tube 46 opens by external pressure two small gaps 50 between the plug 47 and the inner wall of the silicone tube 46.
  • the water filling pushed out of its own vapor pressure from the metering volume 42 in the knitted fabric 6 expire. Only when the rods 23 are released again (arrow C), the additional pressing force disappears on the silicone tubes 46, 48.
  • the outlet 44 closes first and the access 43 opens shortly thereafter.
  • the metering volume 42 is automatically filled again, without allowing water to flow into the evaporator 3. Once the rods 23 are pressed again, the metered amount of water is available for the next cooling again.
  • Fig. 8 finally shows the cooling curve of a 250 ml beverage can with an initial temperature of 31 ° C (thick curve 1).
  • start time minute 2
  • a water bag with 14 ml content is squeezed out.
  • the first temperature in the evaporator (curve 2) drops to approx. 7 ° C.
  • the second measuring point (curve 3)
  • the second measuring point (curve 3)
  • this measuring point shows the expert that in this cooling element more than the minimum amount of zeolite necessary for 4 vessels is filled. With a precisely measured, minimum amount, this measuring point would also be very hot.
  • the beverage can is cooled from 31 ° C to below 7 ° C.
  • the late increase in the two evaporator temperatures shows that the water supply at these points has been used up.
  • the cooled beverage can can then be removed after releasing the pressing means and replaced by a warm can.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Sorption Type Refrigeration Machines (AREA)
EP11007777.3A 2010-10-05 2011-09-23 Elément de refroidissement par sorption Withdrawn EP2439467A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010047371 DE102010047371A1 (de) 2010-10-05 2010-10-05 Sorptions-Kühlelemente

Publications (2)

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EP2439467A2 true EP2439467A2 (fr) 2012-04-11
EP2439467A3 EP2439467A3 (fr) 2013-11-13

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EP (1) EP2439467A3 (fr)
DE (1) DE102010047371A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014008450B4 (de) 2014-06-05 2021-01-21 Airbus Defence and Space GmbH Thermische Konditionierung von Bauteilen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3425419A1 (de) 1984-07-10 1986-01-23 Fritz Dipl.-Ing. Kaubek Adiabatische heiz- und kuehlverfahren und tragbare vorrichtungen nach dem adsorptionsprinzip
EP0368111A2 (fr) 1988-11-08 1990-05-16 ZEO-TECH Zeolith Technologie GmbH Système frigorifique à sorption
US5197302A (en) 1989-01-05 1993-03-30 International Thermal Packaging, Inc. Vacuum insulated sorbent-driven refrigeration device
WO2001010738A1 (fr) 1999-08-04 2001-02-15 Crown Cork & Seal Technologies Corporation Canette a refroidissement integre
US6474100B1 (en) 2001-04-25 2002-11-05 Thermal Products Development Inc. Evacuated sorbent assembly and cooling device
WO2007006065A1 (fr) 2005-07-08 2007-01-18 Peter Lang Echangeur thermique et contenant de temperation comportant un echangeur thermique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1967799B1 (fr) * 2007-03-05 2012-11-21 ZEO-TECH Zeolith Technologie GmbH Elément de refroidissement et de sorption doté d'un organe de réglage et d'une source de chaleur supplémentaire
EP2006616A2 (fr) 2007-06-19 2008-12-24 ZEO-TECH Zeolith Technologie GmbH Eléments de refroidissement de sorption flexibles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3425419A1 (de) 1984-07-10 1986-01-23 Fritz Dipl.-Ing. Kaubek Adiabatische heiz- und kuehlverfahren und tragbare vorrichtungen nach dem adsorptionsprinzip
EP0368111A2 (fr) 1988-11-08 1990-05-16 ZEO-TECH Zeolith Technologie GmbH Système frigorifique à sorption
US5197302A (en) 1989-01-05 1993-03-30 International Thermal Packaging, Inc. Vacuum insulated sorbent-driven refrigeration device
WO2001010738A1 (fr) 1999-08-04 2001-02-15 Crown Cork & Seal Technologies Corporation Canette a refroidissement integre
US6474100B1 (en) 2001-04-25 2002-11-05 Thermal Products Development Inc. Evacuated sorbent assembly and cooling device
WO2007006065A1 (fr) 2005-07-08 2007-01-18 Peter Lang Echangeur thermique et contenant de temperation comportant un echangeur thermique
EP1902261A1 (fr) 2005-07-08 2008-03-26 Peter Lang Echangeur thermique et contenant de temperation comportant un echangeur thermique

Also Published As

Publication number Publication date
EP2439467A3 (fr) 2013-11-13
DE102010047371A1 (de) 2012-04-05

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