Adsorbent particles and adsorption bed of adsorption refrigeration system

Abstract

This invention discloses an adsorbent particle comprising an adsorbent body, wherein the surface of the adsorbent body forms pits recessed towards the center of the adsorbent body and / or protrusions protruding away from the center of the adsorbent body. In the above-mentioned adsorbent particle, the pits and protrusions create a depth space in the longitudinal direction of the adsorbent particle, which not only effectively increases the adsorption surface area but also enhances the mass and heat transfer effect in the central portion, while simultaneously increasing the overall particle size. In summary, this adsorbent particle effectively solves the problem of poor mass transfer caused by excessively large adsorbent particles in an adsorption bed. This invention also discloses an adsorption bed comprising the above-mentioned adsorbent particle.

Description

Technical Field

[0001] This invention relates to the field of adsorption technology, and more specifically, to an adsorbent particle, and also to an adsorption bed of an adsorption refrigeration system. Background Technology

[0002] The adsorption bed includes an adsorbent and may also be provided with a heat exchange channel, in which the adsorbent and the heat exchange channel are in thermally conductive contact, so that the heat exchange fluid in the heat exchange channel can transfer heat to the adsorbent, and then to the adsorbate in the adsorbent.

[0003] At low temperatures, adsorbents can adsorb or / and bind to gaseous adsorbates. This can be a physical change, such as the gaseous working fluid changing into a liquid state to be adsorbed onto the adsorbent; or a chemical change, where the adsorbate chemically binds to the adsorbent, resulting in the adsorption of the adsorbate. At high temperatures, the adsorbent can absorb heat to generate a gaseous adsorbate, which is then released. This process is the reverse of the above; it can be a change from liquid to gas or a chemical change to release the gaseous working fluid.

[0004] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art: the adsorbent can be laid flat in a layer or scattered in a cage structure. When placed in a cage structure, the pore size of the cage structure cannot be too small due to manufacturing process issues. This requires the use of adsorbent particles with a relatively large particle size. However, if the diameter of the adsorbent particles is too large, it will lead to poor mass transfer and heat transfer effects of the adsorbent particles. Summary of the Invention

[0005] In view of this, the first objective of the present invention is to provide an adsorbent particle that can effectively solve the problem of poor mass transfer caused by excessively large adsorbent particles in an adsorption bed. The second objective of the present invention is to provide an adsorption bed comprising the above-mentioned adsorbent particles.

[0006] To achieve the first objective mentioned above, the present invention provides the following technical solution: An adsorbent particle includes an adsorbent body, the surface of which is formed with pits recessed toward the center of the adsorbent body and / or protrusions protruding away from the center of the adsorbent body.

[0007] In the aforementioned adsorbent particles, multiple particles can be randomly placed within a cavity during use, closely packed together. The raised surfaces allow for larger particle sizes, suitable for large-pore structures. These raised areas also increase surface area, improving adsorption efficiency and mass transfer efficiency in the central region. Similarly, adsorbent particles with surface depressions also increase particle size, suitable for large-pore structures. The depressions further increase surface area, improving adsorption efficiency and enhancing mass transfer through the depressions. The presence of depressions or raised surfaces increases contact area and creates appropriately sized gaps for mass transfer. The combination of depressions and raised surfaces creates depth within the adsorbent particles, effectively increasing the adsorption surface area, enhancing mass and heat transfer in the central region, and expanding the overall particle size. In summary, this adsorbent particle effectively solves the problem of poor mass transfer caused by excessively large adsorbent particles in the adsorption bed.

[0008] In some technical solutions, the depth of the pit is not less than one-eighth of the dimension of the adsorbent body in the depth direction of the pit, and the protrusion height of the protrusion is not less than one-eighth of the dimension of the adsorbent body in the protrusion direction of the protrusion.

[0009] In some technical solutions, the depth of the pit is not less than one-quarter of the dimension of the adsorbent body in the depth direction of the pit, and the protrusion height of the protrusion is not less than one-quarter of the dimension of the adsorbent body in the protrusion direction of the protrusion.

[0010] In some technical solutions, the pit is an arc-shaped pit.

[0011] In some technical solutions, the protrusion is spherical.

[0012] In some technical solutions, the adsorbent body has a spherical structure, and the outer surface of the spherical structure is uniformly arranged with a plurality of pits or a plurality of protrusions.

[0013] In some technical solutions, the spacing between adjacent pits is equal to the width of the pit, and the gap between adjacent protrusions is equal to the thickness of the protrusion.

[0014] In some technical solutions, the adsorbent body comprises a mixed structure of adsorbent powder and metal powder.

[0015] In some technical solutions, the adsorbent body includes foamed metal particles and adsorbents attached to the inside and outside of the foamed metal particles.

[0016] To achieve the second objective mentioned above, the present invention also provides an adsorption bed for an adsorption refrigeration system. This adsorption bed includes any of the aforementioned adsorbent particles, a cage-like frame, and heat transfer tubes passing through the cavity of the cage-like frame. Multiple adsorbent particles are placed within the cavity of the cage-like frame. Since the aforementioned adsorbent particles possess the aforementioned technical effects, the adsorption bed containing these adsorbent particles should also possess corresponding technical effects. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the pitted adsorbent particles provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the half-section structure of the pitted adsorbent particles provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the pitted adsorbent particles provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the protruding adsorbent particles provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of a half-section of the protruding adsorbent particles provided in an embodiment of the present invention. Figure 6 This is a schematic cross-sectional view of the protruding adsorbent particles provided in an embodiment of the present invention.

[0019] The following labels are shown in the attached diagram: Adsorbent body 1, pit 11, convex part 12, central part 13. Detailed Implementation

[0020] This invention discloses an adsorbent particle to effectively solve the problem of poor mass transfer caused by excessively large adsorbent particles in an adsorption bed.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-6 , Figure 1 This is a schematic diagram of the structure of the pitted adsorbent particles provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the half-section structure of the pitted adsorbent particles provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the pitted adsorbent particles provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the protruding adsorbent particles provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of a half-section of the protruding adsorbent particles provided in an embodiment of the present invention. Figure 6 This is a schematic cross-sectional view of the protruding adsorbent particles provided in an embodiment of the present invention.

[0023] In some embodiments, an adsorbent particle is provided for primary application in the adsorption bed of an adsorption refrigeration system. The adsorbent needs to have the function of adsorbing a gaseous working substance; specifically, it should be able to desorb the gaseous working substance when heated to a first preset temperature, and adsorb the gaseous working substance when cooled to a second preset temperature. The adsorption of the gaseous working substance by the adsorbent can be based on physical or chemical principles. The adsorbent itself has tiny pores to allow the gaseous working substance to penetrate deeper into the adsorbent. Similarly, the adsorbent needs to exchange heat with the outside, thereby exchanging heat with the working substance. During desorption, heat is absorbed from the outside to transfer heat to the working substance, causing the gaseous working substance to be desorbed; during adsorption, when the gaseous working substance binds to the adsorbent, heat is released, and this released heat is transferred to the outside through the adsorbent.

[0024] The adsorbent particles, a type of granular structure, generally have an outer diameter of no more than 5 cm, typically between 0.1 cm and 1 cm. However, they can be smaller or larger than 1 cm. When the working medium is water and the adsorption principle is physical adsorption, the diameter of the adsorbent particles is generally between 0.1 cm and 1 cm. The adsorbent particles can be spherical, blocky, or other shapes; there are no limitations on this. In use, the adsorbent particles can be laid flat on a tray, or they can be confined within a cage-like structure.

[0025] To facilitate heat input during desorption and heat removal during adsorption, a heat transfer structure is typically incorporated. Each adsorbent particle engages with this structure through direct or indirect thermal contact. When the adsorbent particles are relatively small, some particles will directly contact the heat transfer structure for direct heat transfer, while others will indirectly connect to the structure via the aforementioned particles. This thermal transfer structure can be exemplified by a heat pipe, which can alternately carry a high-temperature fluid for desorption and a low-temperature fluid for adsorption. Alternatively, the thermal transfer structure can be a solid structure.

[0026] The adsorbent body 1 of the adsorbent particles is a monolithic structure. It may contain only the adsorbent material, or other materials may be added to facilitate internal heat transfer. For example, the adsorbent body 1 can be made solely of silica gel, aluminum phosphate, or a combination of both. In this case, the adsorbent body 1 only contains the adsorbent material, with silica gel and aluminum phosphate being the same adsorbent material. Alternatively, the adsorbent body 1 can be made of a composite material containing both metal powder and adsorbent powder, where the metal powder enhances heat transfer.

[0027] The surface of the adsorbent body 1 has recesses 11 that are concave towards the center of the adsorbent body 1 and / or protrusions 12 that are convex away from the center of the adsorbent body 1. Only recesses 11, only protrusions 12, or a combination of both can be provided. The recesses 11 are characterized by continuous pit walls, while the protrusions 12 can be block-shaped or rod-shaped. Alternatively, the protrusions 12 and recesses 11 can be staggered. The specific arrangement aims to create a longitudinal and transverse pattern along the direction near or away from the center, thus avoiding the problem of low mass transfer efficiency in the middle of large particles.

[0028] The surface of the adsorbent body 1 is formed with pits 11, which can be cylindrical pores or concave groove structures; the specific structure is not limited. By recessing towards the center of the adsorbent body 1, the bottom of the pit 11 is closer to the center of the adsorbent body 1 than its opening. For example, multiple pits 11 can be formed on the surface of a spherical structure, in which case the center of the adsorbent body 1 is the center of the spherical structure; or multiple pits 11 can be formed on the side of a rod-shaped structure, in which case the center of the adsorbent body 1 is the central axis of the rod-shaped structure. The area of ​​the adsorbent body 1 without pits 11 can serve as an adsorption surface, and the walls of the pits 11 can also form adsorption surfaces. An adsorption surface refers to the surface capable of adsorbing gaseous working fluids, such as forming tiny openings in the adsorption surface for adsorbing the working fluid.

[0029] The surface of the adsorbent body 1 has protrusions 12 that bulge away from the center of the adsorbent body 1. Specifically, the adsorbent body 1 may include a central portion 13 and protrusions 12. The protrusions 12 are provided on the surface of the central portion 13, and multiple protrusions 12 that are separated from each other may be uniformly arranged on the surface of the central portion 13. In this case, the portion of the surface of the central portion 13 that is not connected to the protrusions 12 forms an adsorption surface. At this time, the diameter of the central portion 13 is small, which can realize the continued mass and heat transfer towards the center point. At the same time, the surface of the protrusions 12 also constitutes an adsorption surface, thereby increasing the adsorption surface area, and the protrusions 12 facilitate mass and heat transfer. The protrusions 12 can be columnar, blocky, or spherical structures. Specifically, they can be set according to needs.

[0030] In the aforementioned adsorbent particles, during use, multiple adsorbent particles can be randomly placed in a cavity, closely packed together. The surface protrusions allow for a larger particle size, suitable for large-pore structures. The protrusions 12 also increase the surface area, improving adsorption efficiency and mass transfer efficiency at the center 13. Similarly, adsorbent particles with surface pits 11 can also have a larger particle size, suitable for large-pore structures. The surface depressions also increase the surface area, improving adsorption efficiency and enhancing mass transfer through the pits at the center 13. Furthermore, the presence of pits 11 or protrusions increases the contact area between particles while creating appropriately sized gaps to facilitate mass transfer. In the aforementioned adsorbent particles, the pits 11 and protrusions create a depth space along the longitudinal direction of the adsorbent particles. This not only effectively increases the adsorption surface area but also enhances the mass and heat transfer effect of the central part 13, while simultaneously expanding the overall particle size. In summary, these adsorbent particles effectively solve the problem of poor mass transfer caused by excessively large adsorbent particles in the adsorption bed.

[0031] In some embodiments, to achieve better depth in the pit 11, the depth D of the pit 11 is not less than one-eighth of the dimension L of the adsorbent body 1 in the depth direction of the pit 11, i.e., D ≥ 0.125L, and preferably D < L, with D ≤ 0.5L. The depth D of the pit 11 refers to the distance between the bottom and the top of the pit in the concave direction. This distance is very important, indicating the depth to which the gaseous adsorbent can freely enter (free entry means very little resistance), and also indicating the distance from the center to the nearest adsorption surface. Compared to the overall size of the adsorbent body 1: the depth D of the pit 11 should not be too large, as this results in a small overall adsorption capacity and low overall adsorption efficiency, as seen in structures with larger pit depths, such as groove-shaped structures; similarly, the depth D of the pit 11 should not be too small, as this makes desorption and adsorption at the central 13-position difficult, leading to longer desorption and adsorption times and thus low efficiency, as seen in structures with smaller pit depths, such as golf ball structures. The direction of the depression, that is, the depth direction of the pit 11, can be the perpendicular direction of the plane where the pit opening of the pit 11 is located, or the orientation of the pit opening of the pit 11, or it can be an angle, but the standard is to reflect the distance from the pit opening to the bottom of the pit.

[0032] The dimension L of the adsorbent body 1 in the depth direction of the pit 11 refers to the distance between the two sides of the adsorbent body 1 in the same direction as determined by D above. For example, when two pits 11 are arranged opposite each other about the center, with their openings facing opposite directions, the distance between the openings of these two pits 11 is the dimension L of the adsorbent body 1 in the depth direction of the pit 11. By comparing the depth D of the pit 11 with the overall solid dimension L of the adsorbent body 1 through the direction of the depression, the effect is to determine whether the distance from the lateral center part to the bottom of the nearest pit 11 meets the requirements.

[0033] In some embodiments, the depth D of the pit 11 can be not less than one-quarter of the depth dimension L of the adsorbent body 1 in the pit 11, where D ≥ 0.25L, and further, 0.5L ≥ D ≥ 0.25L. It should be noted that the depth dimension L of the adsorbent body 1 in the pit 11 should not be too large, generally between 0.1 cm and 1 cm.

[0034] As attached Figure 1 , 2 As shown in Figure 3, for the adsorbent body 1, which is spherical in shape, multiple pits 11 can be uniformly arranged on its surface. Each pit 11 preferably has a spherical bottom, or a bowl shape. This method of forming pits 11 is simple and facilitates demolding during the casting process. The depth of the spherical pit 11 refers to the farthest distance between the bottom and the opening of the pit 11, and the direction of this distance is generally understood as the direction of the depression.

[0035] Of course, in addition to the arc-shaped recess 11, the recess 11 can also be a square recess 11 or an irregular recess 11. Compared with other recesses 11, the arc-shaped recess 11 is not only conducive to demolding, but also avoids the problem of adsorbent particles breaking.

[0036] In some embodiments, to achieve better depth of the protrusion 12, it is preferable that the protrusion height H of the protrusion 12 is not less than one-eighth of the dimension L of the adsorbent body 1 in the protrusion direction of the protrusion 12, i.e., H ≥ 0.125 L, and of course, H < L, preferably H is less than 0.4 L. The protrusion height H of the protrusion 12 refers to the distance in the direction of the line connecting the top and bottom of the protrusion and the center 13 of the adsorbent body 1. If the protrusion extends radially, then the height is the radially upward distance between the top and bottom. This distance is of great significance, as it indicates the longitudinal depth into which the gaseous adsorbent can freely penetrate, and also indicates the distance from the center position to the nearest adsorption surface. Compared to the overall size of the adsorbent body 1: the height H of the protrusion 12 should not be too large, otherwise the overall adsorption capacity will be small, resulting in low overall adsorption efficiency; similarly, the height H of the protrusion 12 should not be too small, otherwise desorption and adsorption in the central part 13 will be difficult, resulting in longer desorption and adsorption times, and therefore low efficiency. Structures with smaller protrusion heights, such as yoga ball structures with protrusions, are suitable. Specific structures can be referenced from virus-type structures.

[0037] The dimension L of the adsorbent body 1 in the convex direction of the protrusion 12 refers to the distance between the two sides of the adsorbent body 1 in the same direction as determined by H above, including the dimension of the protrusion 12 itself. For example, when two protrusions 12 are arranged opposite each other about the center, the distance between the tops of the two protrusions 12 is the dimension L of the adsorbent body 1 in the convex direction of the protrusion 12. By comparing the protrusion height H with the overall solid dimension L of the adsorbent body 1 through the protrusion direction, the effect is to determine whether the distance between the transverse center part 13 and the bottom of the nearest pit 11 meets the requirements.

[0038] In some embodiments, the height H of the protrusion can be not less than one-quarter of the dimension L of the adsorbent body 1 in the protrusion direction of the protrusion 12, H ≥ 0.25L, and further 0.4L ≥ H ≥ 0.25L. It should be noted that the dimension L of the adsorbent body 1 in the protrusion direction of the protrusion 12 should not be too large, generally between 0.1 cm and 1 cm.

[0039] As attached Figure 4 , 5As shown in Figure 6, the adsorbent body 1 includes a central portion 13 and multiple protrusions 12. The central portion 13 can be spherical, and the outer surface of the protrusions 12 is spherical. In this case, the surface of the central portion 13 not covered by the protrusions 12 is the adsorption surface, and similarly, the outer surface of the protrusions 12 is the adsorption surface, so that multiple surfaces can adsorb. Preferably, the width of the protrusions 12 is consistent with the protrusion height of the protrusions 12. Generally, the width W of the protrusions 12 can be between half and twice the protrusion height H, that is, 2H ≥ W ≥ 0.5H.

[0040] Furthermore, the diameter of the central part 13 can be made equal to the height of the protrusion H. If the central part 13 is far away from both of them having protrusions 12, then the dimension L of the adsorbent body 1 in the protrusion direction of the protrusion 12 is equal to 3H.

[0041] In some embodiments, the protrusion 12 can be spherical, and preferably the radius of the protrusion 12 is smaller than the protrusion height H, so that the root is in a constricted state to facilitate the flow of the gaseous adsorbent. Specifically, the radius r of the protrusion 12 can be between 0.8H and 0.9H.

[0042] In some embodiments, the adsorbent body 1 may be in the form of a spherical structure, and the outer surface of the spherical structure may be uniformly provided with a plurality of the said pits 11 or a plurality of said protrusions 12.

[0043] In some embodiments, the spacing J between adjacent pits 11 can be equal to the width W of the pit 11. If the former is too large, the adsorption efficiency will be low; if the former is too small, the adsorption amount will be too small. The spacing J between adjacent pits 11 refers to the distance between the boundaries of adjacent pits 11. The width W of the pit 11 refers to the distance between two points far apart from the pit opening. For example, in a spherical pit 11, where the pit opening is circular, the width is the diameter of the pit opening.

[0044] In some embodiments, the gap J between adjacent protrusions 12 can be equal to the roughness C of the protrusion 12. If the former is too large, the adsorption capacity is low; if the former is too small, the adsorption efficiency is not high. Specifically, the gap J between adjacent protrusions 12 refers to the distance between the boundaries of adjacent protrusions 12. The roughness C of the protrusion 12 refers to the farthest distance between the two sides of the protrusion 12 in the lateral direction. For example, for a spherical protrusion 12, the cross-section at its widest position is circular, so the width is the diameter of the cross-section at its widest position.

[0045] In some embodiments, in order to better ensure heat transfer inside the adsorbent body 1, the adsorbent body 1 can be a mixed structure of adsorbent powder and metal powder, wherein the adsorbent powder plays an adsorption role, and the metal powder can accelerate heat transfer to ensure the heat transfer effect.

[0046] The proportion of metal powder added to the adsorbent powder should not be too high; too high a proportion will result in low adsorption efficiency, while too low a proportion will result in poor adsorption performance. Furthermore, to improve the overall mass and heat transfer effect, the adsorbent powder can be located only on the outer surface of the adsorbent body 1, such as the surface without the pits 11 or the surface of the protrusions 12, to increase heat transfer with other adsorbent particles. Other parts then do not need to have thermal contact with other adsorbent particles, thus eliminating the need for heat transfer and allowing them to contain little or no metal powder.

[0047] In some embodiments, to better ensure heat transfer within the adsorbent body 1, the adsorbent body 1 may include a foamed metal and an adsorbent attached to the foamed metal. The foamed metal may be, for example, foamed copper or foamed aluminum. In this case, the foamed metal may have a block structure, such as a plate structure, and multiple through holes may be arranged along the plate's extension direction. The foamed metal may also form a protrusion 12 structure and a central structure.

[0048] Based on the adsorbent particles provided in the above embodiments, the present invention also provides an adsorption bed for use in an adsorption refrigeration system. The adsorption bed includes any of the adsorbent particles described in the above embodiments, comprising a cage-like frame and heat transfer tubes penetrating the cavity of the cage-like frame. Multiple adsorbent particles are placed within the cavity of the cage-like frame, wherein the heat transfer tubes are used for alternating flow of a high-temperature fluid for desorption and a low-temperature fluid for adsorption. Since this adsorption bed uses the adsorbent particles described in the above embodiments, the beneficial effects of this adsorption bed are explained in the above embodiments.

[0049] The cage-like frame can contain multiple adsorbent particles of the same type, or it can contain two different shapes of adsorbent particles. Mixing these two different shapes prevents the adsorbent particles from being too tightly packed together, which could lead to poor mass transfer. Specifically, the cage-like frame can contain adsorbent particles with recesses 11 and adsorbent particles with protrusions 12, which can be mixed together. The number of adsorbent particles with recesses 11 can be equal to the number of adsorbent particles with protrusions 12.

[0050] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adsorbent particle, characterized in that, Includes an adsorbent body (1), the surface of which is formed with a pit (11) that is recessed toward the center of the adsorbent body (1) and / or a protrusion (12) that is raised away from the center of the adsorbent body (1).

2. The adsorbent particles according to claim 1, characterized in that, The depth of the pit (11) is not less than one-eighth of the dimension of the adsorbent body (1) in the depth direction of the pit (11), and the protrusion height of the protrusion (12) is not less than one-eighth of the dimension of the adsorbent body (1) in the protrusion direction of the protrusion (12).

3. The adsorbent particles according to claim 1, characterized in that, The depth of the pit (11) is not less than one-quarter of the dimension of the adsorbent body (1) in the depth direction of the pit (11), and the protrusion height of the protrusion (12) is not less than one-quarter of the dimension of the adsorbent body (1) in the protrusion direction of the protrusion (12).

4. The adsorbent particles according to claim 3, characterized in that, The pit (11) is an arc-shaped pit (11).

5. The adsorbent particles according to claim 3, characterized in that, The protrusion (12) is spherical.

6. The adsorbent particles according to claim 3, characterized in that, The adsorbent body (1) has a spherical structure, and the outer surface of the spherical structure is uniformly arranged with a plurality of pits (11) or a plurality of protrusions (12).

7. The adsorbent particles according to claim 3, characterized in that, The spacing between adjacent pits (11) is equal to the width of the pit (11), and the gap between adjacent protrusions (12) is equal to the roughness of the protrusion (12).

8. The adsorbent particles according to any one of claims 1-6, characterized in that, The adsorbent body (1) comprises a mixed structure of adsorbent powder and metal powder.

9. The adsorbent particles according to any one of claims 1-6, characterized in that, The adsorbent body (1) includes foamed metal particles and adsorbents attached inside and outside the foamed metal particles.

10. An adsorption bed for an adsorption refrigeration system, comprising a cage-type frame and heat transfer tubes passing through the cavity of the cage-type frame, characterized in that, It also includes adsorbent particles as described in any one of claims 1-8, wherein a plurality of the adsorbent particles are placed in the cavity of the cage-shaped frame.

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