Adsorption components, adsorption bed and adsorption refrigeration unit

Abstract

This invention discloses an adsorption component for an adsorption bed, comprising: a multi-layer flat-plate channel layer with heat exchange channels; a honeycomb skeleton, wherein adsorbent is disposed within the honeycomb pores of the honeycomb skeleton and mass transfer channels extending along a first direction are provided; the honeycomb skeleton is a thermally conductive structure; at least one of the honeycomb skeletons is in thermal contact with the plate surface of the flat-plate channel layer on both sides in a second direction; the first direction is perpendicular to the second direction; the thickness direction of the flat-plate channel layer is the second direction; and the honeycomb pores extend along the first direction. By using a honeycomb skeleton as both the support structure and the thermally conductive structure for the adsorbent, a larger adhesion area is achieved, and heat transfer is more uniform, effectively solving the problem of poor adsorbent arrangement in adsorption beds. This invention also discloses an adsorption bed including the above-mentioned adsorption component, and an adsorption refrigerator including the above-mentioned adsorption bed.

Description

Technical Field

[0001] This invention relates to the field of adsorption technology, and more specifically, to an adsorption component for an adsorption bed, an adsorption bed including the above-mentioned adsorption component, and an adsorption refrigerator including the above-mentioned adsorption bed. Background Technology

[0002] Adsorption refrigeration systems mainly consist of an adsorption bed, an evaporator, and a condenser. The working principle of an adsorption refrigeration system is based on the adsorption capacity of solid adsorbents (such as zeolite, activated carbon, etc.) for certain refrigerant vapors (such as water, methanol, etc.). Heating the adsorbent causes the refrigerant in the adsorbent to desorb, and the desorbed vapor releases heat and condenses into liquid in the condenser. Cooling the adsorbent allows it to regain its adsorption capacity, and the adsorption causes the refrigerant liquid in the evaporator to evaporate. The evaporation in the evaporator absorbs heat, thus achieving refrigeration.

[0003] The adsorption bed, as the core component of the adsorption refrigeration system, is the site where the adsorbent undergoes adsorption and desorption reactions, and its heat and mass transfer performance affects the overall performance of the adsorption refrigeration system. In existing adsorption bed technologies, the contact heat transfer between the adsorbent and the heat exchange surface and the heat transfer within the adsorbent have the greatest impact on the heat transfer of the adsorption bed. When enhancing the heat and mass transfer performance of the adsorption bed, it is difficult to simultaneously consider the adsorbent loading amount and structural compactness.

[0004] For example, Chinese patent CN113041779A discloses a constant-temperature compact cross-flow solid adsorption dehumidification method and dehumidification bed. It achieves a more compact and efficient adsorption dehumidification bed structure design through an improved cross-flow plate-fin sensible heat exchanger. A porous solid adsorption particle material layer is formed by bonding solid desiccant particles to metal thermally conductive fins, which, together with metal partitions, constitutes a dehumidification channel layer. However, even with a single layer of corrugated metal fins between the metal partitions, the adsorption particles still adhere to the fin walls, resulting in low loading capacity and easy detachment.

[0005] Therefore, in the process of realizing this invention, the inventors discovered that the prior art has at least the following problem: the adsorbent arrangement effect of the adsorption bed is not good. Summary of the Invention

[0006] In view of this, the first objective of the present invention is to provide an adsorption component for an adsorption bed that can effectively solve the problem of poor adsorbent arrangement in the adsorption bed. The second objective of the present invention is to provide an adsorption bed including the above-mentioned adsorption component. The third objective of the present invention is to provide an adsorption refrigeration machine including the above-mentioned adsorption bed.

[0007] To achieve the first objective mentioned above, the present invention provides the following technical solution: An adsorption component for an adsorption bed, comprising: Multi-layer flat-plate channel layer with heat exchange channels; A honeycomb skeleton is provided with an adsorbent in the honeycomb pores and has a mass transfer channel extending along a first direction. The honeycomb skeleton is a thermally conductive structure. At least one of the honeycomb skeletons is in thermal contact with the plate surface of the flat channel layer on both sides in a second direction. The first direction is perpendicular to the second direction. The thickness direction of the flat channel layer is the second direction. The honeycomb pores extend along the first direction.

[0008] In operation, a heat exchange fluid flows through the heat exchange channel. Taking desorption as an example, a heat source fluid flows through the heat exchange channel to provide heating. The heat source fluid enters the heat exchange channel and transfers heat through thermal conduction to the flat channel layer, then to the honeycomb skeleton, and finally to the adsorbent, heating the adsorbent and causing it to desorb the adsorbent working substance. The adsorbent then flows out through the designated mass transfer channels. During adsorption, a cooling fluid flows through the heat exchange channel. The external adsorbent working substance enters the mass transfer channel, is adsorbed by the adsorbent, and the released heat passes sequentially through the honeycomb skeleton and the flat channel layer, exchanging heat with the cooling fluid in the heat exchange channel to release the heat. In the above adsorption component, a honeycomb skeleton is used as both the support structure and the heat-conducting structure for the adsorbent. The honeycomb skeleton is characterized by its multiple longitudinally and transversely distributed honeycomb holes, providing a larger adhesion area and more uniform heat transfer. Furthermore, flat channel layers are correspondingly arranged on both sides of the honeycomb skeleton. This ensures uniform heat distribution between these two flat channel layers through the honeycomb skeleton, minimizing localized temperature drops and guaranteeing better synchronous desorption of the adsorbent throughout the bed, thus significantly improving the desorption efficiency. In summary, the adsorption components of the adsorption bed effectively solve the problem of poor adsorbent arrangement in adsorption beds.

[0009] In some technical solutions, a mixing chamber is also included, with one end of the multi-layer flat channel extending into the mixing chamber to communicate with the heat exchange channel; the heat exchange channel extends along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0010] In some technical solutions, an inlet tank and an outlet tank that both extend along the second direction are also included. The cavity of the inlet tank and the cavity of the outlet tank are both the mixing chambers. One end of each of the flat channel layers passes through the cavity of the inlet tank to achieve communication, and the other end passes through the cavity of the outlet tank to achieve communication.

[0011] In some technical solutions, the two opposite directions of the second direction are the forward direction and the backward direction, respectively. The inlet of the liquid inlet tank is located at the front end of the liquid inlet tank, and the outlet of the liquid outlet tank is located at the rear end of the liquid outlet tank.

[0012] In some other technical solutions, the inlet of the liquid inlet tank is located on the front end of the liquid inlet tank on the third direction, the liquid inlet direction of the liquid inlet tank is perpendicular to the second direction, and the liquid inlet of the liquid inlet tank is offset from the flat channel layer in the second direction. The outlet of the liquid outlet tank is located on the third-direction side of the rear end of the liquid outlet tank. The liquid outlet direction of the liquid outlet is perpendicular to the second direction. The liquid outlet of the liquid outlet tank is offset from the flat channel layer in the second direction.

[0013] In some other technical solutions, the inlet of the liquid inlet tank and the outlet of the liquid outlet tank are located on the same side facing upwards.

[0014] In some other technical solutions, the honeycomb skeleton has a plate-like structure, and multiple layers of the plate-type channel layer and multiple honeycomb skeletons are alternately stacked along the second direction.

[0015] In some other technical solutions, the honeycomb skeleton is provided with at least five rows of honeycomb holes along the second direction and at least ten columns of honeycomb holes along the third direction; the adsorbent is uniformly attached to the circumferential walls of the honeycomb holes so that a cavity is formed at the radial center of the honeycomb holes to serve as the mass transfer channel.

[0016] In some other technical solutions, both the inlet tank and the outlet tank are circular tubes extending along a second direction, with both ends of the circular tubes being closed.

[0017] In some other technical solutions, the flat channel layer has a dimension between 1.5 mm and 3 mm in the second direction; the honeycomb skeleton has a dimension between 5 mm and 7 mm in the second direction; the adsorbent thickness attached to the pore walls of the honeycomb pores is between 0.1 mm and 1 mm; and the dimensions of the honeycomb pores in the second direction and in the third direction are both between 0.2 mm and 2.5 mm.

[0018] In some technical solutions, the cross-section of the honeycomb cells is triangular, quadrilateral, pentagonal, hexagonal, or heptagonal.

[0019] In some technical solutions, the cross-section of the honeycomb holes is in the shape of an equilateral triangle, square, trapezoid, or regular hexagon.

[0020] In some technical solutions, the honeycomb skeleton and the flat channel layer are integrally formed and connected.

[0021] In some other technical solutions, the flat channel layer includes a heat-conducting plate, and along the first direction, the heat-conducting plate is provided with a plurality of heat exchange channels arranged in parallel.

[0022] In some other technical solutions, along the first direction, the heat exchange channel located on the outer side protrudes from the corresponding side of the honeycomb skeleton.

[0023] In some other technical solutions, the heat-conducting plate has an outwardly convex arc-shaped structure on both sides in the first direction.

[0024] To achieve the second objective mentioned above, the present invention also provides an adsorption bed comprising any of the aforementioned adsorption components, including a shell, wherein a mass transfer port communicating with a cavity in the shell is provided on the shell, and the adsorption component is located within the cavity, such that the mass transfer channel of the adsorption component communicates with the cavity. Since the aforementioned adsorption components possess the aforementioned technical effects, the adsorption bed having these adsorption components should also possess corresponding technical effects.

[0025] To achieve the second objective mentioned above, the present invention also provides an adsorption refrigerator, which includes any of the aforementioned adsorption beds and an evaporator, wherein the adsorption bed is connected to the working fluid outlet of the evaporator through the mass transfer port. Since the aforementioned adsorption beds possess the aforementioned technical effects, the adsorption refrigerator with such adsorption beds should also possess the corresponding technical effects. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the structure of the adsorption component in the desorption state provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the adsorption component in the adsorption state provided in an embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of the adsorption component in the adsorption state provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the heat exchange of the adsorption component in the adsorption state provided in an embodiment of the present invention; Figure 5 A schematic diagram of a partial third-direction end structure of an adsorption component in an adsorption state provided in an embodiment of the present invention; Figure 6A schematic diagram of a partial first-direction end structure of an adsorption component in an adsorption state provided in an embodiment of the present invention; Figure 7 A schematic diagram of a partial first-direction end structure of a honeycomb skeleton in an adsorption state provided in an embodiment of the present invention; Figure 8 A schematic diagram of the honeycomb pore structure of another honeycomb skeleton in the adsorption state provided in an embodiment of the present invention; Figure 9 A partial schematic diagram of a trapezoidal honeycomb pore combination of another honeycomb skeleton in an adsorption state provided in an embodiment of the present invention; Figure 10 A partial schematic diagram of a triangular honeycomb pore combination of another honeycomb skeleton in an adsorption state provided in an embodiment of the present invention; Figure 11 This is a partial schematic diagram of a hexagonal honeycomb pore combination in an adsorption state provided by an embodiment of the present invention.

[0028] The following labels are shown in the attached diagram: 1. Flat plate channel layer; 2. Honeycomb skeleton; 3. Adsorbent; 4. Inlet tank; 5. Outlet tank; 6. Heat exchange fluid; 7. Refrigerant; 8. Mixing chamber. Heat exchange channel 11, arc surface structure 12; 21. Honeycomb holes; 22. Mass transfer channels; 23. Strip-shaped components; Inlet 41; Liquid outlet 51.

[0029] First direction X, second direction Y, second direction Z.

[0030] The arrows indicate the direction of fluid flow. Detailed Implementation

[0031] This invention discloses an adsorption component for an adsorption bed, which can effectively solve the problem of poor adsorbent arrangement in the adsorption bed.

[0032] 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.

[0033] Please see Figures 1-11 , Figure 1 This is a schematic diagram of the structure of the adsorption component in the desorption state provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the adsorption component in the adsorption state provided in an embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of the adsorption component in the adsorption state provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the heat exchange of the adsorption component in the adsorption state provided in an embodiment of the present invention; Figure 5 A schematic diagram of a partial third-direction end structure of an adsorption component in an adsorption state provided in an embodiment of the present invention; Figure 6 A schematic diagram of a partial first-direction end structure of an adsorption component in an adsorption state provided in an embodiment of the present invention; Figure 7 A schematic diagram of a partial first-direction end structure of a honeycomb skeleton in an adsorption state provided in an embodiment of the present invention; Figure 8 A schematic diagram of the honeycomb pore structure of another honeycomb skeleton in the adsorption state provided in an embodiment of the present invention; Figure 9 A partial schematic diagram of a trapezoidal honeycomb pore combination of another honeycomb skeleton in an adsorption state provided in an embodiment of the present invention; Figure 10 A partial schematic diagram of a triangular honeycomb pore combination of another honeycomb skeleton in an adsorption state provided in an embodiment of the present invention; Figure 11 This is a partial schematic diagram of a hexagonal honeycomb pore combination in an adsorption state provided by an embodiment of the present invention.

[0034] In some embodiments, an adsorption component for an adsorption bed is provided, which can serve as an adsorption module of the adsorption bed, so that multiple such adsorption components can be arranged within the adsorption bed for side-by-side use. Alternatively, the adsorption bed may include only one adsorption component.

[0035] In some embodiments, the provided adsorption component mainly includes a flat channel layer 1 and a honeycomb skeleton 2. A heat exchange fluid 6 flows inside the flat channel layer 1, and an adsorbent 3 is attached to the honeycomb skeleton 2. The honeycomb skeleton 2 and the flat channel layer 1 are in heat exchange contact, thereby enabling heat transfer between the heat exchange fluid 6 and the adsorbent 3.

[0036] In some embodiments, a flat-plate channel layer 1 is provided, which can have a flat-plate structure to form flat-plate channels, thereby providing a flow area and ensuring the contact area between the flat-plate channel layer 1 and the honeycomb skeleton 2. It should be noted that the flat-plate channel can be a single channel or multiple channels arranged laterally, with the walls between the channels providing reinforcement. The flat-plate channel layer 1 can be a single plate structure with flat-plate heat exchange channels 11 or multiple parallel flat-plate heat exchange channels 11. The flat-plate channel layer 1 can also include multiple heat exchange boxes arranged in parallel with a plate structure; in this case, the heat exchange boxes can be square or circular in cross-section.

[0037] The multi-layer flat-plate channel layer 1 is arranged in parallel along the thickness direction to form a multi-layer flow domain, thereby further increasing the flow domain area and enabling efficient heat exchange with the honeycomb skeleton 2. The honeycomb skeleton 2 can be set between adjacent layers of flat-plate channel layer 1 so that both sides can be connected to the flat-plate channel layer 1, allowing heat to be obtained from both sides.

[0038] In some embodiments, a honeycomb skeleton 2 is provided, which is a honeycomb structure characterized by having an array of holes, referred to as honeycomb cells 21. The arrangement of the honeycomb cells 21 can be a circular array, a square array, or other arrangements. The cross-sectional size of each honeycomb cell 21 can be equal or different, generally slightly different, and can be set as needed. The density of the arrangement is generally uniform or can vary, such as having different densities, and can be set as needed.

[0039] The honeycomb-shaped framework 2 contains adsorbent 3 within its honeycomb pores 21. This allows the adsorbent 3 to exchange heat with the heat exchange fluid 6 after passing through the solid portion of the flat channel layer 1, and then with the honeycomb framework 2. The adsorbent 3 then exchanges heat through the honeycomb framework 2 and the adsorbent 3, achieving adsorption and desorption between the adsorbent 3 and the working fluid. The honeycomb framework 2 creates a larger adhesion surface, allowing for the attachment of more adsorbent 3. Furthermore, the honeycomb framework 2, with its heat-conducting components, provides better heat transfer. Moreover, the honeycomb framework 2 not only improves heat transfer efficiency but also ensures uniform heat distribution between the two flat channel layers 1, enabling the adsorbent 3 within the distribution area to simultaneously undergo desorption and adsorption.

[0040] The honeycomb pores 21 contain adsorbent 3. Complete filling of the pores 21 should be avoided as much as possible, leaving a mass transfer channel 22 extending along the first direction. This ensures a relatively large pore depth within the honeycomb pores 21, allowing the adsorbent 3 to better adsorb and desorb the working fluid through the mass transfer channel 22. The first direction refers to the extension direction of the honeycomb pores 21. In this direction, the adsorbent 3 does not completely fill each cross-section of the honeycomb pores 21. Instead, a uniform layer of adsorbent 3 adheres to the pore walls, with the central portion serving as the mass transfer channel 22. Alternatively, adsorbent 3 can adhere to one side of the pore wall, forming a mass transfer channel 22 between the adsorbent 3 and the other side wall. The specific adhesion method of the adsorbent 3 to the pore walls of the honeycomb pores 21 can be spraying, dipping, or other methods.

[0041] The honeycomb skeleton 2 is a heat-conducting structure, forming heat-conducting parts in the walls of the honeycomb holes 21. The honeycomb skeleton 2 is in close contact with the flat channel layer 1 on one side in the second direction to facilitate heat transfer. At least one honeycomb skeleton 2 is in heat-conducting contact with the plate surface of the flat channel layer 1 on both sides in the second direction, ensuring that at least one honeycomb skeleton 2 can be heated on both sides in the second direction, thus guaranteeing the heating effect of the honeycomb skeleton 2 and further ensuring uniform temperature distribution throughout the second direction. The thickness direction of the flat channel layer 1 (consistent with the layer thickness direction) is the second direction, while the honeycomb holes 21 extend along the first direction. The first and second directions are perpendicular, thus offsetting the mass transfer direction from the thickness direction of the flat channel layer 1 to avoid interference.

[0042] In some embodiments, an adsorption component for an adsorption bed is provided. During use, a heat exchange fluid 6 flows through the heat exchange channel 11. Taking desorption as an example, a heat source fluid flows through the heat exchange channel 11 to provide heating. The heat source fluid enters the heat exchange channel 11 and transfers heat through thermal conduction to the flat channel layer 1, then to the honeycomb skeleton 2, and finally to the adsorbent 3, heating the adsorbent 3 to desorb the adsorbent working substance. The adsorbent working substance then flows out through the reserved mass transfer channel 22. During adsorption, a cooling fluid flows through the heat exchange channel 11. External adsorbent working substance enters the mass transfer channel 22 and is adsorbed by the adsorbent 3. The released heat passes sequentially through the honeycomb skeleton 2 and the flat channel layer 1 to exchange heat with the cooling fluid in the heat exchange channel 11, thus releasing the heat.

[0043] In the aforementioned adsorption component, a honeycomb framework 2 is used as the supporting structure and heat-conducting structure for the adsorbent 3. The honeycomb framework 2 is characterized by multiple honeycomb holes 21 distributed longitudinally and laterally, providing not only a large adhesion area but also more uniform heat transfer. Furthermore, flat plate channel layers 1 are correspondingly arranged on both sides of the honeycomb framework 2, ensuring uniform heat distribution between these two layers through the honeycomb framework 2. This minimizes the problem of localized low temperatures, thereby ensuring better and more synchronized desorption of the adsorbent 3 throughout the adsorption bed, significantly improving the desorption efficiency. In summary, the adsorption component of the adsorption bed effectively solves the problem of poor adsorbent 3 arrangement in the adsorption bed.

[0044] In some embodiments, when multiple flat plate channel layers 1 are provided, the heat exchange channels 11 of the multiple flat plate channel layers 1 can be arranged in parallel or in series, depending on the specific requirements. Regardless of whether they are connected in series or in parallel, a mixing chamber 8 is generally provided for easy connection, so that the ends of the multiple flat plate channel layers 1 extend into the mixing chamber 8, thereby connecting the heat exchange channels 11 of the flat plate channel layers 1 to the mixing chamber 8, thus achieving series or parallel connection. The ends of the flat plate channel layers 1 can be inserted into the mixing chamber 8 for easy connection; or the ends of the flat plate channel layers 1 can be connected to corresponding holes on the wall of the mixing chamber 8 for connection.

[0045] Furthermore, the heat exchange channels 11 can be arranged to extend along a third direction, and the first, second, and third directions are arranged perpendicular to each other. This allows them to be staggered and avoids mutual interference.

[0046] Generally speaking, the first direction, the second direction, and the third direction can all be up or down, but the second direction is preferred here.

[0047] In some embodiments, to facilitate the formation of the mixing chamber 8, an inlet tank 4 and an outlet tank 5, both extending along the second direction, may be included, with the cavity of the inlet tank 4 and the cavity of the outlet tank 5 serving as the mixing chamber 8. One end of each of the flat-plate channel layers 1 extends into the cavity of the inlet tank 4 for communication, and the other end extends into the cavity of the outlet tank 5 for communication, thereby forming a parallel relationship among the flat-plate channel layers 1. This reduces the flow path length, makes the temperature more uniform along the second direction, reduces the temperature difference, and improves the desorption efficiency.

[0048] The inlet tank 4 and outlet tank 5 can be formed into a box structure by combining shell structures, such as a cuboid box structure.

[0049] For ease of manufacturing, it is preferable that the inlet tank 4 and the outlet tank 5 be tubular structures, such as extending in the second direction into a strip shape, to accommodate the multi-layer flat channel layer 1 and the multi-layer honeycomb skeleton 2. The tubular structure can be a square tube structure, a round tube structure, etc.

[0050] The inlet tank 4 and outlet tank 5 can be made of circular tubes, meaning both are circular tubes extending along the second direction. The ends of the circular tubes can be sealed to create openings on the sides. Using circular tubes is less expensive and facilitates fluid flow, reducing flow resistance.

[0051] In some embodiments, in order to ensure that the heat exchange fluid 6 is uniformly distributed in each of the flat plate channel layers 1 in the second direction, and to avoid the problem of uneven local distribution,

[0052] It is preferable that the inlet 41 of the liquid inlet tank 4 and the outlet 51 of the liquid outlet tank 5 are respectively located at different ends in the second direction. Compared with setting them at the same end, this can avoid the problem that the flow rate of the flat plate channel layer 1, which is far from the inlet 41, is difficult to guarantee.

[0053] Specifically, the two opposite directions of the second direction are the forward direction and the backward direction. The inlet 41 of the inlet tank 4 is located at the front end of the inlet tank 4, while the outlet 51 of the outlet tank 5 is located at the rear end of the outlet tank 5. The heat exchange fluid 6 in the inlet tank 4 flows in two directions, initially backward, and then gradually separates into three directions to enter the various flat-plate channel layers 1, thus achieving flow splitting. Similarly, the heat exchange fluid 6 in the outlet tank 5 also flows in two directions, initially backward, and then gradually merges into three directions as it flows out of the various flat-plate channel layers 1. Therefore, the inlet tank 4 can use a flow splitter with good flow splitting effect, while the outlet tank 5 can use a flow collector with good flow merging effect, thereby controlling the flow resistance during the flow collection and splitting processes.

[0054] In some embodiments, the liquid inlet 41 of the liquid inlet tank 4 can be in the second direction, such as the rearward direction; similarly, the liquid outlet 51 of the liquid outlet tank 5 can be in the second direction, such as the rearward direction. However, the above arrangement is not conducive to the uniform distribution of the heat exchange fluid 6 in each layer of the flat channel layer 1. Based on this, the liquid inlet 41 of the liquid inlet tank 4 can be located on the front end of the liquid inlet tank 4 in the third direction. In this case, the liquid inlet 41 of the liquid inlet tank 4 is perpendicular to the second direction, such as the first direction and the third direction. Furthermore, it is also necessary to offset the liquid inlet 41 of the liquid inlet tank 4 from the flat channel layer 1 in the second direction to avoid the liquid inlet 41 of the liquid inlet tank 4 directly connecting to the end of part of the flat channel layer 1, especially when the liquid inlet 41 is in the third direction.

[0055] Furthermore, the outlet 51 of the liquid outlet tank 5 can also be located on the third side of the rear end of the liquid outlet tank 5, and the liquid outlet direction of the outlet 51 of the liquid outlet tank 5 is perpendicular to the second direction, such as the first direction or the third direction. At the same time, the outlet 51 of the liquid outlet tank 5 is offset from the flat plate channel layer 1 in the second direction to prevent some of the fluid discharged from the flat plate channel layer 1 from flowing directly to the outlet 51.

[0056] Specifically, in the second direction, each multi-layer flat plate channel layer 1 is disposed between the liquid outlet 51 of the liquid outlet tank 5 and the liquid inlet 41 of the liquid inlet tank 4.

[0057] In some embodiments, the outlet 51 of the outlet tank 5 and the inlet 41 of the inlet tank 4 can both extend in the third direction, so that the pressure is uniform at all points on the flow cross section.

[0058] Specifically, the inlet 41 of the liquid inlet tank 4 and the outlet 51 of the liquid outlet tank 5 can be located on the same side facing upwards to facilitate the connection of external pipes.

[0059] In some embodiments, the honeycomb skeleton 2 can also be a plate-like structure, stacked with multiple flat channel layers 1 to form a multi-layer structure. For example, the multiple flat channel layers 1 and multiple honeycomb skeletons 2 can be alternately stacked along the second direction, so that at least one flat channel layer 1 has a honeycomb skeleton 2 thermally connected to both sides along the thickness direction. This arrangement avoids the flat channel layers 1 and honeycomb skeleton 2 from being too large, thus ensuring heat transfer effect and avoiding excessively large heat transfer paths, resulting in a more uniform heat distribution.

[0060] Along the second direction, the outermost flat channel layer 1 located on both sides can be left open without being attached to the honeycomb skeleton 2, or it can be attached to the honeycomb skeleton 2. The size of the honeycomb skeleton 2 attached to the outer side in the second direction is preferably smaller than the size of the inner honeycomb skeleton 2 in the second direction, such as the former being half of the latter.

[0061] Alternatively, the outermost flat channel layer 1 on both sides can be directly attached with an adsorbent layer 3.

[0062] In some embodiments, the honeycomb frame 2 has a plurality of honeycomb holes 21, which can be arranged in an array, i.e., forming multiple rows and columns of honeycomb holes 21, such as at least two rows and two columns of honeycomb holes 21. Preferably, the honeycomb frame 2 has at least five rows of honeycomb holes 21 along the second direction and at least ten columns of honeycomb holes 21 along the third direction. As shown in the figure, the honeycomb frame 2 has ten rows of honeycomb holes 21 along the second direction and ninety-seven columns of honeycomb holes 21 along the third direction.

[0063] Furthermore, it is preferable that each honeycomb pore 21 is uniformly attached to the circumferential wall of the pore to form an annular adsorbent 3 layer, so that a cavity is formed in the radial center of the honeycomb pore 21 as a mass transfer channel 22, that is, the inner cavity of the annular adsorbent 3 layer serves as the adsorbent 3 layer.

[0064] For the circular array of honeycomb holes 21, the size of the honeycomb skeleton 2 in the second direction can be made not less than 5 times the diameter of the honeycomb hole 21, so that it has a sufficient span to provide multiple honeycomb holes 21.

[0065] In addition, the size of the honeycomb skeleton 2 in the third direction can be no less than 10 times the diameter of the honeycomb hole 21, so as to have sufficient span to provide multiple honeycomb holes 21.

[0066] In some embodiments, the flat channel layer 1 may have a dimension between 1.5 mm and 3 mm in the second direction, such as 2 mm; the honeycomb skeleton 2 may have a dimension between 5 mm and 7 mm in the second direction, such as 6 mm; and the adsorbent 3 attached to the pore walls of the honeycomb pores 21 may have a thickness between 0.1 mm and 1 mm, primarily the thickness of the adsorbent on one side of the pore wall. The dimensions of the honeycomb pores 21 in both the second and third directions are between 0.2 mm and 2.5 mm. The heat exchange channel 11 of the flat channel layer 1 is a microchannel structure.

[0067] In some embodiments, the flat channel layer 1 may have a dimension of no more than 2 mm in the second direction, and the honeycomb skeleton 2 may have a dimension of no more than 6 mm in the second direction.

[0068] In some embodiments, the cross-section of the honeycomb cells 21 can be polygonal, such as triangular, quadrilateral, pentagonal, hexagonal, or heptagonal, to facilitate the formation of a good honeycomb structure. Triangular, quadrilateral, pentagonal, or hexagonal shapes are preferred for easier arrangement.

[0069] In some embodiments, the cross-section of the honeycomb holes 21 can be equilateral triangles, squares, trapezoids, or regular hexagons to make heat transfer more uniform in all directions.

[0070] The preferred shape here is a regular hexagon, which ensures sufficient roundness and avoids adjacent corners being too small, which would be detrimental to the adhesion of the adsorbent 3. It also facilitates regular placement.

[0071] In some embodiments, the honeycomb skeleton 2 and the flat channel layer 1 can be integrally formed and connected. This can better reduce the contact thermal resistance between the honeycomb skeleton 2 and the flat channel layer 1, resulting in better heat transfer. Specific connection methods include extrusion molding, CNC machining, casting, additive manufacturing, etc. Preferably, both the honeycomb skeleton 2 and the flat channel layer 1 are metal structures to have better thermal conductivity.

[0072] In some embodiments, a honeycomb skeleton 2 can be formed by sintering and connected to a flat channel layer 1 to form a porous microchannel structure.

[0073] In some embodiments, the honeycomb skeleton 2 can be integrally formed or formed by combining multiple strips 23.

[0074] In some embodiments, for ease of installation, the flat channel layer 1 may include a heat-conducting plate. Specifically, along the first direction, the heat-conducting plate may have multiple heat exchange channels 11 arranged in parallel. The walls between adjacent heat exchange channels 11 can provide reinforcement, while also facilitating uniform fluid distribution and preventing mutual interference.

[0075] In some embodiments, along the first direction, the heat exchange channel 11 located on the outer side protrudes from the corresponding side of the honeycomb skeleton 2 to ensure uniform heating on both sides of the honeycomb skeleton 2 and avoid uneven heating at the ends. The heat-conducting plate has an outwardly convex arc surface structure 12 on both sides of the first direction to provide good guidance for the gaseous adsorption working fluid. Correspondingly, along the first direction, the outermost honeycomb hole 21 can have an arc surface structure 12 on its outermost wall to adapt to changes in the outer surface.

[0076] In some of the above embodiments, an adsorption bed is provided, specifically a high-efficiency and compact adsorption bed. It can be described as a high-efficiency and compact adsorption bed based on a parallel-flow microchannel heat exchanger, with an improved parallel-flow microchannel cross-flow adsorption bed structure design, achieving both enhanced heat and mass transfer performance of the adsorption bed and good balance between adsorbent loading and structural compactness. The adsorption bed is the site where the adsorbent 3 undergoes adsorption and desorption reactions: the heat exchange fluid 6 enters the inlet 41 of the inlet 4 and, as the heat exchange fluid 6 continuously accumulates in the inlet 4, flows sequentially into the flat channel layer 1 connected to the inlet 4; since the flat channel layer 1 and the honeycomb skeleton 2 are alternately connected, the heat exchange fluid 6 exchanges heat with the honeycomb skeleton 2 as it flows along the flat channel layer 1, and desorption or adsorption reactions occur within the honeycomb skeleton 2; the desorption reaction is endothermic, and the refrigerant 7 vapor leaves the adsorption bed, and the temperature of the heat exchange fluid 6 flowing out of the outlet 51 of the outlet 5 is lower than when it flows in through the inlet 41 of the inlet 4; the adsorption reaction is exothermic, and the refrigerant 7 vapor enters the adsorption bed, and the temperature of the heat exchange fluid 6 flowing out of the outlet 51 of the outlet 5 is higher than when it flows in through the inlet 41 of the inlet 4.

[0077] Desorption process: When a hot fluid with low-grade thermal energy flows in through the inlet 41 of the inlet tank 4, the heat exchange fluid 6 accumulates in the inlet tank 4 and flows into the flat plate channel layer 1 connected to it through the heat exchange fluid 6 channel. At this time, the heat exchange fluid 6 with a higher temperature flows in the flat plate channel layer 1. Due to the low heat transfer resistance of the microchannel geometry, the heat of the heat exchange fluid 6 is quickly transferred to the flat plate channel layer 1. Then, the heat of the flat plate channel layer 1 is quickly transferred to the honeycomb skeleton 2 connected to it. Subsequently, the heat of the honeycomb skeleton 2 is transferred to the adsorbent 3. The adsorbent 3 absorbs heat, the temperature rises, and a desorption reaction occurs. The refrigerant 7 in the adsorbent 3 is desorbed to form vapor, which quickly leaves the adsorption bed through the refrigerant 7 mass transfer channel 22. This process is called the adsorption bed desorption process.

[0078] Adsorption process: When the cold fluid flows in through the inlet 41 of the inlet tank 4, the heat exchange fluid 6 gathers in the inlet tank 4 and flows into the flat plate channel layer 1 connected to it. At this time, the heat exchange fluid 6 with a lower temperature flows in the flat plate channel layer 1, the temperature of the flat plate channel layer 1 decreases, the temperature of the honeycomb skeleton 2 also decreases, the temperature of the adsorbent 3 decreases and the adsorption capacity is restored, and an adsorption reaction occurs. The refrigerant 7 vapor of the adsorbent 3 quickly enters the adsorption bed through the refrigerant 7 mass transfer channel 22, and the adsorbent 3 absorbs the refrigerant 7 vapor, completing the adsorption process.

[0079] In some of the above embodiments, the heat exchange liquid side adopts a flat plate channel layer 1 (parallel flow microchannel structure): this reduces the heat transfer resistance of the heat exchange liquid side, which significantly improves the flow and heat transfer performance of the heat exchange liquid in the channel, and achieves a high-efficiency and compact heat transfer effect.

[0080] The adsorbent 3 side adopts a honeycomb skeleton 2, which is also a microchannel structure: the metal inner wall of the honeycomb pores 21 of the honeycomb skeleton 2 is coated with a thin layer of adsorbent 3 of sub-millimeter (0.1-1mm). The heat required to regenerate the adsorbent 3 layer is transferred through the thin wall of the microchannel, which reduces the parasitic heat loss of the adsorbent 3 and the supporting structure, and minimizes the inherent heat transfer resistance of the adsorption bed.

[0081] The honeycomb skeleton 2 and the flat channel layer 1 are stacked in a multi-layered and tightly arranged manner: the coating loading is increased, the cooling capacity per unit volume is improved, and the adsorbent 3 in the adsorption bed is heated evenly; the coating on the microchannel wall has good adhesion and bonding strength, and the mass transfer channel 22 can be naturally formed in the middle of the microchannel, so that the refrigerant 7 can enter or leave the adsorption bed in time during the desorption / adsorption process, thereby improving the mass transfer efficiency.

[0082] Based on the adsorption components provided in the above embodiments, the present invention also provides an adsorption bed, which includes any one of the adsorption components in the above embodiments and further includes a shell. The shell is provided with a mass transfer port communicating with the shell cavity. The adsorption component is located inside the shell cavity, so that the mass transfer channel 22 of the adsorption component communicates with the shell cavity. Since this adsorption bed uses the adsorption components in the above embodiments, the beneficial effects of this adsorption bed are explained in the above embodiments.

[0083] The adsorption components are set as modular structures in the adsorption bed, and the adsorption bed can be equipped with multiple adsorption components.

[0084] Based on the adsorption bed provided in the above embodiments, the present invention also provides an adsorption refrigerator, which includes any one of the adsorption beds in the above embodiments, includes an evaporator, and the adsorption bed is connected to the working fluid outlet of the evaporator through the mass transfer port. Since this adsorption refrigerator uses the adsorption bed in the above embodiments, the beneficial effects of this adsorption refrigerator are explained in the above embodiments.

[0085] A condenser may also be provided, with the mass transfer port of the adsorption bed connected to the condenser. During the adsorption stage, the vapor outlet of the evaporator is connected to the mass transfer port to supply gaseous refrigerant 7 into the outer shell cavity. During the desorption stage, the vapor inlet of the condenser is connected to the mass transfer port to supply gaseous refrigerant 7 to the condenser.

[0086] 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.

[0087] 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 adsorption component for an adsorption bed, characterized in that, include: The multi-layer flat channel layer (1) has heat exchange channels (11). A honeycomb skeleton (2) is provided with an adsorbent (3) in the honeycomb holes (21) and a mass transfer channel (22) extending along the first direction is provided. The honeycomb skeleton (2) is a thermally conductive structure. At least one of the honeycomb skeletons (2) is in thermal contact with the plate side of the flat channel layer (1) on both sides of the second direction. The first direction is perpendicular to the second direction. The thickness direction of the flat channel layer (1) is the second direction. The honeycomb holes (21) extend along the first direction.

2. The adsorption component according to claim 1, characterized in that, It also includes a mixing chamber (8), one end of the multi-layer flat channel layer (1) extends to the mixing chamber (8) so that the heat exchange channel (11) communicates with the mixing chamber (8); the heat exchange channel (11) extends along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

3. The adsorption component according to claim 2, characterized in that, It also includes an inlet tank (4) and an outlet tank (5) that both extend along the second direction. The cavity of the inlet tank (4) and the cavity of the outlet tank (5) are both the mixing chamber (8). One end of each of the flat channel layers (1) is inserted into the cavity of the inlet tank (4) to achieve communication, and the other end is inserted into the cavity of the outlet tank (5) to achieve communication.

4. The adsorption component according to claim 3, characterized in that, With the two opposite directions of the second direction being the forward direction and the backward direction, the inlet (41) of the inlet tank (4) is located at the front end of the inlet tank (4), and the outlet (51) of the outlet tank (5) is located at the rear end of the outlet tank (5).

5. The adsorption component according to claim 4, characterized in that, The inlet (41) of the liquid inlet tank (4) is located on the front end of the liquid inlet tank (4) on the third direction. The liquid inlet (41) of the liquid inlet tank (4) is perpendicular to the second direction. The liquid inlet (41) of the liquid inlet tank (4) is offset from the flat channel layer (1) in the second direction. The outlet (51) of the liquid outlet tank (5) is located on the third side of the rear end of the liquid outlet tank (5). The liquid outlet (51) of the liquid outlet tank (5) is perpendicular to the second direction. The outlet (51) of the liquid outlet tank (5) is offset from the flat channel layer (1) in the second direction.

6. The adsorption component according to claim 5, characterized in that, The inlet (41) of the liquid inlet tank (4) and the outlet (51) of the liquid outlet tank (5) are located on the same side facing upwards.

7. The adsorption component according to claim 6, characterized in that, The honeycomb skeleton (2) has a plate-like structure, and multiple layers of the flat channel layer (1) and multiple honeycomb skeletons (2) are alternately stacked along the second direction.

8. The adsorption component according to claim 7, characterized in that, The honeycomb skeleton (2) has at least five rows of honeycomb holes (21) along the second direction and at least ten columns of honeycomb holes (21) along the third direction; the adsorbent (3) is uniformly attached to the circumferential wall of the honeycomb hole (21) so that a cavity is formed in the radial center of the honeycomb hole (21) to serve as the mass transfer channel (22).

9. The adsorption component according to claim 8, characterized in that, Both the inlet tank (4) and the outlet tank (5) are circular tubes extending along the second direction, and the two ends of the circular tubes are closed.

10. The adsorption component according to claim 8, characterized in that, The flat channel layer (1) has a dimension between 1.5 mm and 3 mm in the second direction; the honeycomb skeleton (2) has a dimension between 5 mm and 7 mm in the second direction; the adsorbent (3) attached to the pore wall of the honeycomb pore (21) has a thickness between 0.1 mm and 1 mm; and the dimensions of the honeycomb pore (21) in the second direction and in the third direction are both between 0.2 mm and 2.5 mm.

11. The adsorption member according to any one of claims 1-10, characterized in that, The cross-section of the honeycomb hole (21) is triangular, quadrilateral, pentagonal, hexagonal or heptagonal; or, the cross-section of the honeycomb hole (21) is equilateral triangle, square, trapezoid or regular hexagonal; And / or, the honeycomb skeleton (2) is integrally formed and connected with the flat channel layer (1).

12. The adsorption member according to any one of claims 1-10, characterized in that, The flat channel layer (1) includes a heat-conducting plate body, and along the first direction, the heat-conducting plate body is provided with a plurality of heat exchange channels (11) arranged in parallel in sequence.

13. The adsorption component according to claim 12, characterized in that, Along the first direction, the heat exchange channel (11) located on the outer side protrudes from the corresponding side of the honeycomb skeleton (2); And / or, the heat-conducting plate has an outwardly convex arc surface structure on both sides in the first direction (12).

14. An adsorption bed, comprising a shell, wherein a mass transfer port communicating with a cavity in the shell is provided on the shell, characterized in that, Includes an adsorption member as described in any one of claims 1-13, wherein the adsorption member is located within the shell cavity such that the mass transfer channel (22) of the adsorption member communicates with the shell cavity.

15. An adsorption refrigeration machine, comprising an evaporator, characterized in that, Includes the adsorption bed as described in claim 14, wherein the adsorption bed is connected to the working fluid outlet of the evaporator through the mass transfer port.

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