Adsorption bed and its heat transfer means

Abstract

This invention discloses a heat transfer component for an adsorption bed, including a partition with several pores. A plurality of first adsorbent particles and a plurality of second adsorbent particles are dispersed on one side of the partition. The first adsorbent particles are positioned between the second adsorbent particles and the partition to block the second adsorbent particles. The first adsorbent particles are larger than the pores to restrict their passage through the pores, while the second adsorbent particles are no larger than the pores. Because the first adsorbent particles, with larger particle sizes, are positioned closer to the partition than the second adsorbent particles, they can be effectively blocked. The increased pore size provides a larger inlet area, facilitating the passage of both external and internal adsorbents, thus improving mass transfer efficiency. This invention also discloses an adsorption bed including the above-described heat transfer component.

Description

Technical Field

[0001] This invention relates to the field of adsorption technology, and more specifically, to a heat transfer component for an adsorption bed, and to an adsorption bed including the aforementioned heat transfer component. 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 pores of the cage structure cannot be too large, otherwise the adsorbate particles will easily leak out; if they are too small, mass transfer will be impaired. Similarly, if the adsorbate particles are enlarged, the adsorption effect of the adsorbent particles will be poor, resulting in low efficiency. Summary of the Invention

[0005] In view of this, the first objective of the present invention is to provide a heat transfer component for an adsorption bed that can effectively solve the problem of poor mass transfer performance in current adsorption beds. The second objective of the present invention is to provide an adsorption bed including the above-mentioned heat transfer component.

[0006] To achieve the first objective mentioned above, the present invention provides the following technical solution: A heat transfer component for an adsorption bed includes a partition with several holes. A plurality of first adsorbent particles and a plurality of second adsorbent particles are dispersed on one side of the partition. The first adsorbent particles are arranged between the second adsorbent particles and the partition to block the second adsorbent particles. The first adsorbent particles are larger than the holes to be restricted from passing through the holes, and the second adsorbent particles are not larger than the holes.

[0007] In the aforementioned adsorption bed, during use, larger first adsorbent particles are arranged on the side of the second adsorbent particles closest to the partition, allowing the pores to be larger than or equal to the size of the second adsorbent particles. Because of the obstruction of the first adsorbent particles, they do not move to the pores and thus do not flow out through them. The increased pore size results in a larger inlet area, facilitating the passage of both external and internal adsorbents, thus improving mass transfer. Regarding adsorption, smaller second adsorbent particles still exist, thus achieving a good adsorption effect with at least a portion of the adsorbent. In summary, this adsorption bed effectively solves the problem of poor mass transfer in current adsorption beds.

[0008] In some technical solutions, the particle size of the second adsorbent particles is not smaller than the interparticle spacing of the first adsorbent particles.

[0009] In some technical solutions, a plurality of the first adsorbent particles are dispersed to form a first adsorbent layer, and a plurality of the second adsorbent particles are dispersed to form a second adsorbent layer, wherein the second adsorbent layer, the first adsorbent layer, and the spacer are arranged sequentially.

[0010] In some technical solutions, the first adsorbent particles are spherical, spindle-shaped, or cylindrical, and the cross-section of the pores is square.

[0011] In some technical solutions, the first adsorbent particles are square, and the cross-section of the pores is circular.

[0012] In some technical solutions, the surface of the first adsorbent particles is formed with pits and / or protrusions.

[0013] In some technical solutions, the first adsorbent particles form through-holes.

[0014] In some technical solutions, the first adsorbent particle is spherical, the pore cross-section is circular, and the diameter of the pore is smaller than the diameter of the first adsorbent particle.

[0015] In some technical solutions, the spacer is a mesh spacer, and the mesh openings of the spacer are the holes.

[0016] To achieve the second objective mentioned above, the present invention also provides an adsorption bed, which includes any of the aforementioned heat transfer components and a chamber, wherein the heat transfer component is disposed in the chamber. Since the aforementioned heat transfer components possess the above-mentioned technical effects, the adsorption bed having such heat transfer components 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 an adsorption bed provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another adsorption bed structure provided in an embodiment of the present invention; Figure 3 for Figure 1 , 2 Enlarged structural diagram at point A; Figure 4 A schematic diagram of the side structure of the partition provided in an embodiment of the present invention; Figure 5 A schematic diagram illustrating the obstruction of the first adsorbent particles by the spacer provided in an embodiment of the present invention; Figure 6 This is a schematic diagram illustrating the obstruction of a second adsorbent particle by a first adsorbent particle according to an embodiment of the present invention.

[0019] The following labels are shown in the attached diagram: 1. Spacer; 2. First adsorbent particles; 3. Second adsorbent particles; 4. Heat exchange channel; Hole 11. Detailed Implementation

[0020] This invention discloses a heat transfer component for an adsorption bed, which effectively solves the problem of poor mass transfer performance in current adsorption beds.

[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 an adsorption bed provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another adsorption bed structure provided in an embodiment of the present invention; Figure 3 for Figure 1 , 2 Enlarged structural diagram at point A; Figure 4 This is a side view of the partition 1 provided in an embodiment of the present invention; Figure 5 A schematic diagram showing the obstruction of the first adsorbent particles 2 by the spacer 1 provided in an embodiment of the present invention; Figure 6 This is a schematic diagram showing the first adsorbent particle 2 blocking the second adsorbent particle 3 according to an embodiment of the present invention.

[0023] In some embodiments, this embodiment provides an adsorption bed, specifically, the adsorption bed includes a spacer 1 and adsorbent particles. The adsorption bed can be applied to adsorption refrigeration technology.

[0024] The spacer 1 has several holes 11. Adsorbent particles are placed on one side of the spacer 1, and a mass transfer channel is formed on the other side. The "mass" refers to the working fluid, which forms an adsorbent-working fluid pair with the adsorbent. During use, when adsorption occurs, the external gaseous working fluid enters the mass transfer channel, then passes through the holes 11 to reach the other side of the spacer 1, approaching the adsorbent, and is then adsorbed by it. The adsorption can take the form of physical adsorption, where the gaseous working fluid transforms into a liquid state; it can also be a combination of physical and chemical adsorption; or, if chemical adsorption conditions permit, only chemical adsorption may be used. During the desorption phase, the working fluid desorbs from the adsorbent, forming a gaseous working fluid, which can then pass through the holes 11 into the mass transfer channel for discharge.

[0025] In all adsorbent particles, some are first adsorbent particles 2, and some are second adsorbent particles 3. Alternatively, only first adsorbent particles 2 and second adsorbent particles 3 may exist, and a third adsorbent particle can also be added. The particle size of the first adsorbent particle 2 is the first particle size, and the particle size of the second adsorbent particle 3 is the second particle size, which is smaller than the first particle size. The adsorbent particles have a granular structure, also known as a particulate structure. A granular structure refers to a structure with a relatively small volume, which can be like a grain of rice or a stone. Specific shapes include spherical, cylindrical, ellipsoidal, cubic, irregular blocky, or other shapes. The term granular structure generally arises because the adsorption bed contains a large number of small-volume monomer structures; these monomer structures are called granular structures, and thus adsorbent particles. The particle size of an adsorbent particle generally refers to the distance between the two farthest points of this monomer structure. For example, for a spherical particle, the particle size refers to its diameter; for a cubic particle, the particle size refers to the distance between its diagonal points.

[0026] Several first adsorbent particles 2 and several second adsorbent particles 3 are scattered on one side of the spacer 1. That is, a mass transfer channel is provided on one side of the spacer 1, and the first adsorbent particles 2 and the second adsorbent particles 3 are provided on the other side. The first adsorbent particles 2 are arranged between the second adsorbent particles 3 and the spacer 1 to block the second adsorbent particles 3 and prevent them from moving into the pores 11 of the spacer 1. Specific placement methods: One simple method is a layered distribution, where several first adsorbent particles 2 are scattered to form a first adsorbent layer, and several second adsorbent particles 3 are scattered to form a second adsorbent layer. The second adsorbent layer, the first adsorbent layer, and the spacer 1 are arranged sequentially, with the first adsorbent layer blocking the second adsorbent layer and the spacer 1. Another placement method is to have the first adsorbent particles 2 scattered to form a multi-cavity structure, while the second adsorbent particles 3 are located in the cavities within the cavity structure. It should be noted that "scattered" means that the adsorbent particles are not constrained and can be separated, ensuring a more compact bond between them, and the arrangement method is simple.

[0027] The first adsorbent particle 2 is larger than the pore 11 to be restricted from passing through the pore 11. The measure of "large" is that it cannot pass through the pore 11. One way to measure this is that the maximum cross-sectional profile of the first adsorbent particle 2 in any direction of extension is larger than the minimum profile of the pore 11, so that the first adsorbent particle 2 cannot pass through the pore 11 regardless of its orientation.

[0028] The second adsorbent particle 3 is no larger than the pore 11 so that it can pass through the pore 11. The ability to pass through the pore 11 is used to define the particle size of the second adsorbent particle 3, not to describe its positional relationship. Because the first adsorbent particle 2 is too large to pass through the pore 11, while the second adsorbent particle 3 is small enough to pass through the pore 11, it can be seen that the second adsorbent particle 3 is smaller than the first adsorbent particle 2. The smaller the volume, the better the mass and heat transfer effect.

[0029] One configuration involves making the first particle size larger than the width of the pore 11 to prevent the first adsorbent particle 2 from passing through the pore 11, while the second particle size is smaller than the width of the pore 11. Due to the obstruction of the first adsorbent particle 2, even if the second adsorbent particle 3 has a relatively small particle size, it cannot pass through the width of the pore 11. The width of the pore 11, such as the width of a cylindrical pore 11, is the diameter of the pore 11. Generally, the width of the pore 11 refers to the width of its cross-section.

[0030] In the aforementioned adsorption bed, during use, because the second adsorbent particles 3 are positioned closer to the partition 1, the first adsorbent particles 2, with a larger particle size, are arranged so that the pores 11 can be larger than or equal to the second adsorbent particles 3. Due to the obstruction of the first adsorbent particles 2, they will not move to the pores 11 and thus will not flow out through them. The increased pore size of the pores 11 results in a larger inlet area, allowing both external and internal adsorbents to pass through easily, thus improving mass transfer. For adsorption, the smaller second adsorbent particles 3 still exist, thus forming a good adsorption effect with at least a portion of the adsorbent. In summary, this adsorption bed effectively solves the problem of poor mass transfer in current adsorption beds.

[0031] In some embodiments, the smaller the particle size of the second adsorbent particle 3, the better; however, it cannot be too small, otherwise it will pass through the interparticle gaps formed on the first adsorbent particle 2. Specifically, the particle size of the second adsorbent particle 3 can be not smaller than the interparticle gaps of the first adsorbent particle 2. These interparticle gaps can be formed between the first adsorbent particles 2 or within the first adsorbent particles 2.

[0032] In some embodiments, as described above, a plurality of the first adsorbent particles 2 can be dispersed to form a first adsorbent layer, and a plurality of second adsorbent particles 3 can be dispersed to form a second adsorbent layer, with the second adsorbent layer, the first adsorbent layer, and the spacer 1 arranged sequentially. The first adsorbent layer should not be too thick, as the adsorption effect of the first adsorbent particles 2 is not as good as that of the second adsorbent particles 3. While using irregularly shaped first adsorbent particles 2 can improve the adsorption effect, it also increases the cost. Therefore, too many and / or irregularly shaped first adsorbent particles 2 will result in poor adsorption performance and / or high cost for the entire adsorption bed. Therefore, the thickness of the first adsorbent layer is preferably between two and four times the particle size of the first adsorbent particles 2, ensuring both a barrier effect and avoiding an excessive number. Furthermore, the thickness of the first adsorbent layer can be less than the thickness of the second adsorbent layer.

[0033] During the spread-out molding process, a thinner isolation structure, such as a thin film structure, can be set to form a first cavity between the isolation structure and the spacer 1, in which the first adsorbent particles 2 are placed to form a first adsorbent layer. Then, a second adsorbent particle 3 is placed on the side of the isolation structure away from the first adsorbent particle 2 to form a second adsorbent layer. Then, the thin film structure is removed. If the thickness of the thin film structure is sufficiently small, even if the second adsorbent particle 3 falls, it will not fall too much. Of course, if there is enough space, a flat laying method can also be used.

[0034] In some instances, to prevent the first adsorbent particles 2 from blocking the pores 11, the first adsorbent particles 2 can be made so that they cannot cover or block the pores 11 in any way. This ensures that there is always a gap between the first adsorbent particles 2 and the pores 11 to avoid complete blockage. The pores 11 can be made elongated.

[0035] Specifically, the first adsorbent particles 2 can be spherical, spindle-shaped, or cylindrical, with the cross-section of the pores 11 being square. This ensures that the pores 11 will not be blocked regardless of how the first adsorbent particles 2 are placed, thus guaranteeing mass transfer efficiency. The square shape of the pores 11 refers to their square or circular cross-section. This structure results in relatively low molding costs for the first adsorbent particles 2.

[0036] For spherical first adsorbent particles 2, their diameter should be greater than the side length of the cross-section of the aperture 11; for spindle-shaped first adsorbent particles 2, their maximum cross-sectional diameter should be greater than the side length of the cross-section of the aperture 11; for cylindrical first adsorbent particles 2, their cross-sectional diameter should be greater than the side length of the cross-section of the aperture 11.

[0037] In some embodiments, the first adsorbent particle 2 can be square, while the cross-section of the pore 11 is circular, which still avoids the first adsorbent particle 2 clogging the pore 11. Specifically, the diagonal length of the first adsorbent particle 2 can be greater than the diameter of the cross-section of the pore 11, while the side length of the first adsorbent particle 2 is smaller than the diameter of the cross-section of the pore 11. This is especially true for cubic first adsorbent particles 2, which can better prevent clogging. This structure is relatively easy to implement in terms of cost for the pore 11.

[0038] In some embodiments, the reason why the first adsorbent particle 2 cannot pass through the pore 11 is partly because the particle size of the first adsorbent particle 2 is relatively large. If the particle size of the adsorbent is too large, the distance between the central adsorbent and the outer surface will be too large, making it easier for the outer adsorbent to adsorb the working fluid. This results in a longer adsorption time and desorption time for a single first adsorbent particle 2.

[0039] Based on this, pits or protrusions can be formed on the surface of the first adsorbent particles 2. The pitted structure increases the surface area and reduces adsorption / desorption time; while the protruding structure increases the particle size. This means that for particles of the same size, those with protruding structures have a larger adsorption surface area, making the adsorption amount easier to control, thus reducing adsorption / desorption time. For pitted structures, such as those found on golf balls, the proportion of pits in the overall structure can be larger than that of a golf ball, resulting in a deeper pit structure. For protruding structures, such as those found on viruses, the first adsorbent particles 2 can be formed through growth, such as spherical particles. First, a spherical matrix is ​​formed, then a fluid adsorbent slurry is attached to the surface of the spherical matrix. The adsorbent slurry drips under gravity, and some of it remains on the surface, gradually forming a protruding structure. The spherical matrix tumbles, with different faces downwards, forming protrusions in different directions.

[0040] In some embodiments, considering that even with a concave or convex structure, the solid middle portion still exhibits slow adsorption, a through-hole can be formed in the middle of the first adsorbent particle 2. This through-hole allows mass transfer, enabling the external adsorbent to enter the interior and accelerate the internal adsorption effect. On the other hand, the gap between the first adsorbent particle 2 and the pore 11 may be insufficient, affecting the mass transfer effect. However, a through-hole is formed in the middle of the first adsorbent particle 2, with only one end facing the pore 11. This allows the adsorbent to be transferred not only through the gap between the first adsorbent particle and the pore 11, but also through the through-hole. Generally, the first adsorbent particle 2 can form only one through-hole or multiple through-holes, but this results in weaker strength and more difficult processing.

[0041] Since the first adsorbent particle 2 is relatively large, the method of forming through holes is relatively simple. For example, bead-shaped first adsorbent particles 2 are gradually generated on a line, and then they are separated by thermal expansion and contraction or forced pushing to form a bead-shaped structure.

[0042] When the first adsorbent particle 2 forms a through hole, the first adsorbent particle 2 can be spherical, and the cross-section of the hole 11 is circular. The diameter of the hole 11 is smaller than the diameter of the first adsorbent particle 2.

[0043] Of course, when the first adsorbent particle 2 forms a through hole, the first adsorbent particle 2 can be spherical and the cross-section of the hole 11 is square. At this time, the spacer 1 is a mesh structure and the mesh of the spacer 1 is the hole 11.

[0044] As attached Figure 6 As shown, when both the first adsorbent particle 2 and the second adsorbent particle 3 are spherical, the particle size of the second adsorbent particle 3 is greater than... , where r is the radius of the first adsorbent particle 2.

[0045] In some embodiments, a heat exchange channel 4 is generally provided, which is located on the side of the second adsorbent layer away from the first adsorbent layer. The heat exchange channel 4 is used for the flow of heat exchange fluid. During the adsorption stage, a low-temperature fluid generally flows through it to absorb heat from the adsorbent through the channel wall; while during the desorption stage, a high-temperature fluid generally flows through it to heat the adsorbent through the channel wall.

[0046] Based on the heat transfer components provided in the above embodiments, the present invention also provides an adsorption bed, which includes any one of the heat transfer components in the above embodiments, including a chamber, wherein the heat transfer component is disposed in the chamber. Since this adsorption bed uses the heat transfer components in the above embodiments, the beneficial effects of this adsorption bed are explained in the above embodiments.

[0047] Furthermore, the adsorption bed can be equipped with multiple heat transfer components as modular parts, evenly arranged in the adsorption bed chamber. In this case, each heat transfer component has a multi-port structure at both ends of its heat pipe 1, serving as a collector and a distributor, respectively.

[0048] 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.

[0049] 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. A heat transfer component for an adsorption bed, characterized in that, Includes a partition (1), on which several holes (11) are arranged. Several first adsorbent particles (2) and several second adsorbent particles (3) are scattered on one side of the partition (1). The first adsorbent particles (2) are arranged between the second adsorbent particles (3) and the partition (1) to block the second adsorbent particles (3). The first adsorbent particles (2) are larger than the holes (11) to be restricted from passing through the holes (11), and the second adsorbent particles (3) are not larger than the holes (11).

2. The heat transfer component according to claim 1, characterized in that, The particle size of the second adsorbent particle (3) is not less than the particle gap of the first adsorbent particle (2).

3. The heat transfer component according to claim 2, characterized in that, A number of the first adsorbent particles (2) are dispersed to form a first adsorbent layer, and a number of the second adsorbent particles (3) are dispersed to form a second adsorbent layer. The second adsorbent layer, the first adsorbent layer and the spacer (1) are arranged in sequence.

4. The heat transfer component according to claim 1, characterized in that, The first adsorbent particle (2) is spherical, spindle-shaped or cylindrical, and the cross-section of the pore (11) is square.

5. The heat transfer component according to claim 1, characterized in that, The first adsorbent particle (2) is square, and the cross-section of the pore (11) is circular.

6. The heat transfer component according to claim 1, characterized in that, The surface of the first adsorbent particle (2) has pits and / or protrusions.

7. The heat transfer component according to claim 1, characterized in that, The first adsorbent particle (2) forms a through hole.

8. The heat transfer component according to claim 7, characterized in that, The first adsorbent particle (2) is spherical, and the pore (11) has a circular cross-section. The diameter of the pore (11) is smaller than the diameter of the first adsorbent particle (2).

9. The heat transfer component according to claim 1, characterized in that, The spacer (1) is a mesh spacer (1), and the mesh of the spacer (1) is the eyelet (11).

10. An adsorption bed, comprising a chamber, characterized in that, It also includes the heat transfer member as described in any one of claims 1-9, wherein the heat transfer member is disposed in the chamber.

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