Adsorption device and refrigerator comprising same

Abstract

The utility model provides an adsorption device and a refrigerator comprising the same, the adsorption device comprises a container, the inner cavity of the container is divided into at least two adsorption chambers, the two adjacent adsorption chambers are communicated, and the adsorption chambers are filled with adsorption materials; a gas inlet in the container is communicated with the adsorption chamber at the gas flow starting end; the first gas outlet is communicated with the adsorption chamber positioned at the gas flowing tail end and is used for discharging unadsorbed gas; the second gas outlet is formed in the communication part of the two adjacent adsorption chambers and is used for discharging the adsorbed gas. According to the adsorption device and the refrigerator comprising the same, the flowing path of the raw material gas in the adsorption chamber is prolonged, so that the adsorbable gas is more sufficiently adsorbed, the adsorption effectiveness is improved, and the concentration and purity of the prepared gas are improved. During desorption, adsorbed gas in the two adjacent adsorption chambers can be discharged through the second gas outlet located in the middle, the gas release path is shortened, the exhaust efficiency is improved, the subsequent adsorption efficiency is not affected, and therefore the overall adsorption performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of adsorption gas production, in particular to an adsorption device and a refrigerator comprising the same. Background Art

[0002] As we all know, fruit and vegetable storage and preservation is one of the core functions of refrigerators. In order to improve the preservation effect, all refrigerator manufacturers have worked hard to develop new technologies so that the refrigerator can achieve a long-term and effective preservation effect. The long-term preservation of fruits and vegetables is inseparable from a low-oxygen environment. Therefore, PSA (Pressure Swing Adsorption) nitrogen production technology, which can perform efficient nitrogen and oxygen separation and quickly create a low-oxygen environment, has become the focus of refrigerator manufacturers.

[0003] In the prior art, a molecular sieve adsorption tower is generally used to separate the raw gas and produce nitrogen, which is used to preserve food. The structure of the traditional molecular sieve adsorption tower has the following characteristics:

[0004] 1. The adsorption tower is a cylinder with a circular inner wall section;

[0005] 2. The raw air inlet and nitrogen outlet are located at the two ends of the adsorption tower in the axial direction, that is, the raw air enters from one end of the adsorption tower and moves forward in a straight line along its axial direction. During this period, oxygen is adsorbed by the molecular sieve and nitrogen is discharged from the other end of the adsorption tower.

[0006] Traditional molecular sieve adsorption towers are more suitable for industrial nitrogen production, but are not suitable for placement in refrigerators for the following reasons: refrigerators are typical shell-shaped containers with very compact space from the inner wall to the outer wall, and require the arrangement of air ducts, foam, evaporators, copper tubes, hardware back panels and other components. The area where the adsorption tower can be placed is large but very thin (common thickness is about 20 mm); traditional adsorption towers are circular in cross-section, with a diameter generally ≥45 mm (tower length is about 200 mm), which is difficult to meet the thickness requirements of refrigerators; and in order to quickly create a high-nitrogen, low-oxygen environment in the refrigerator, the PSA nitrogen production module needs to have a good nitrogen production capacity, that is, the adsorption tower needs to have a larger volume to fill enough molecular sieves. If the diameter of the adsorption tower is 20 mm, although the thickness requirement is met, the corresponding length needs to be extended to 800 mm to 1000 mm, which is also difficult to meet the requirements on refrigerators and greatly increases the difficulty of assembly and mounting.

[0007] In addition, the traditional molecular sieve adsorption tower has the following defects: during the adsorption process, the airflow path is short, resulting in insufficient adsorption of oxygen, and some oxygen is still discharged together with nitrogen, resulting in low nitrogen concentration and purity. During the desorption process, when releasing the adsorbed oxygen, the efficiency of oxygen discharge is low, and some oxygen still remains in the molecular sieve and other adsorption materials, affecting the subsequent adsorption effect. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the defects of poor adsorption effectiveness, low gas production concentration and low exhaust efficiency during desorption of adsorption devices such as adsorption towers in the prior art, and to provide an adsorption device and a refrigerator including the same.

[0009] The utility model solves the above technical problems through the following technical solutions:

[0010] An adsorption device, comprising a container, wherein the inner cavity of the container is divided into at least two mutually connected adsorption chambers, the connection between each two adjacent adsorption chambers is configured so that the sum of the paths through which gas flows through all the adsorption chambers is greater than the path through which gas flows through any one of the adsorption chambers, and each of the adsorption chambers is filled with an adsorption material;

[0011] The container is provided with an air inlet at the start of the gas flow, and a first air outlet at the end of the gas flow, and the adsorption flow path is that the gas enters from the air inlet, flows through the mutually connected adsorption chambers in sequence, and finally discharges the gas not adsorbed by the adsorption material from the first air outlet;

[0012] The container is provided with a second gas outlet near or directly opposite to the connection between each two adjacent adsorption chambers, and the desorption flow path is from each adsorption chamber to the adjacent second gas outlet, and the gas adsorbed by the adsorption material is discharged from the second gas outlet.

[0013] In this scheme, the adsorption device realizes the adsorption and desorption of at least two gases in the raw gas by controlling the opening or closing combination of the air inlet, the first air outlet and the second air outlet. During adsorption, the air inlet and the first air outlet are opened, the second air outlet is closed, and the raw gas flows along the adsorption flow path, that is, it enters the adsorption chamber from the air inlet and flows through each adsorption chamber in sequence. The adsorbable gas in the raw gas is adsorbed by the adsorption material, and the non-adsorbable gas is discharged from the first air outlet; during desorption, the air inlet and the first air outlet are closed, the second air outlet is opened, the adsorbable gas adsorbed by the adsorption material is released, flows along the desorption flow path, and is discharged from the second air outlet. The adsorption device separates the container into at least two mutually connected adsorption chambers, and adjusts the position of the connection between each two adsorption chambers so that the sum of the paths of the gas flowing through all the adsorption chambers is greater than the gas flow path of any one adsorption chamber, thereby extending the flow path of the raw gas in multiple adsorption chambers, so that the adsorbable gas can be more fully adsorbed, improving the adsorption effectiveness and adsorption capacity, thereby improving the concentration and purity of the gas production. By arranging the second gas outlet near or directly opposite to the connecting point between each two adjacent adsorption chambers, during desorption, the adsorbed gas in the two adjacent adsorption chambers can be discharged through the second gas outlet in the middle, thereby shortening the desorption flow path when the adsorbed gas is released, improving the exhaust efficiency during desorption, and not leaving uncleanly discharged gas to affect the subsequent adsorption efficiency, thereby improving the overall adsorption performance.

[0014] Preferably, the connection point between at least one group of two adjacent adsorption chambers is arranged at a position higher than half of the length of the container along the gas flow direction.

[0015] In this solution, the connection point between at least one group of two adjacent adsorption chambers is located higher than half of the length of the container along the gas flow direction, so that the sum of the paths of the gas flowing through all the adsorption chambers is greater than the gas flow path of any one of the adsorption chambers, thereby extending the gas flow path and preventing the gas from entering the next adsorption chamber too early.

[0016] Preferably, the adsorption device is provided with at least one end cover, and the end cover is detachably connected to the container; two adjacent adsorption chambers are separated by a spacer, and the spacer is arranged along the air inlet direction;

[0017] The two ends of the spacer along the air inlet direction are respectively a flush end and a retracted end, the flush end is flush with one end shell of the container or the end cover, and the retracted end is spaced apart from the other end shell of the container or the end cover.

[0018] In this solution, the adsorption device is filled with adsorption material through the end cap detachably connected to the container, and multiple adsorption chambers are formed through the separation of the spacer. Through the above-mentioned setting of the two ends of the spacer, the adsorption chamber is not connected at the flush end of the spacer, and a space connecting two adjacent adsorption chambers is formed at the interval between the indented end and the shell or the end cap, so that during desorption, the adsorbed gas in the two adjacent adsorption chambers can be discharged from the second gas outlet at the indented end, shortening the flow path of the released gas and improving the exhaust efficiency of desorption.

[0019] Preferably, the inner cavity of the container is divided into two adsorption chambers, namely a first adsorption chamber and a second adsorption chamber, and a front end cover and a rear end cover are provided at both ends of the adsorption device, and the front end cover and the rear end cover are respectively detachably connected to the container;

[0020] The flush end is flush with the front end cover, and the indented end is spaced apart from the rear end cover;

[0021] The air inlet is arranged at a position of the front end cover corresponding to the first adsorption chamber, the first air outlet is arranged at a position of the front end cover corresponding to the second adsorption chamber, and the second air outlet is arranged on the rear end cover.

[0022] In this solution, the raw gas enters from the air inlet of the front cover, and the non-adsorbable gas flows from the first adsorption chamber through the second adsorption chamber, and then flows out from the first air outlet of the front cover on the same side. Compared with only one adsorption chamber, the gas flow path is doubled, and the adsorption is more sufficient. The second air outlet is located in the center of the gas flow path through the above arrangement, and the gas release flow path of the two adsorption chambers is the same, which improves the desorption and exhaust efficiency.

[0023] Preferably, the container is provided with a diverter plate near the air inlet, the diverter plate is arranged perpendicular to the air inlet direction, a plurality of diverter holes are arranged on the diverter plate, and the diverter plate is spaced apart from the shell or the end cover at one end of the container near the air inlet;

[0024] And / or, the container is provided with a diverter plate near the first air outlet, the diverter plate is arranged perpendicular to the air inlet direction, a plurality of diverter holes are provided on the diverter plate, and the diverter plate is spaced apart from the end shell or the end cover of the container near the first air outlet.

[0025] In this solution, through the above arrangement, when the container is provided with a diverter plate near the air inlet, the raw gas is buffered between the diverter plate and the end cover or end shell of the container, and the gas will not directly impact the surface of the adsorption material, reducing the impact of the incoming gas on the adsorption material, which is conducive to ensuring the adsorption capacity of the adsorption material; at the same time, the diverter holes on the diverter plate divide the raw gas into small streams, which is conducive to dispersed adsorption and improves the adsorption effectiveness. When the container is provided with a diverter plate near the first air outlet, the dispersed airflow is discharged from the first air outlet without causing blockage.

[0026] Preferably, the container is provided with a filter at the first air outlet or the second air outlet, the filter is arranged perpendicular to the air inlet direction, and the filter is arranged on the surface of the adsorption material.

[0027] In this solution, impurities in the flowing gas are filtered out by the filter arranged as above, and the gas is purer.

[0028] Preferably, an elastic member is provided between the filter and an end shell or the end cover of the container at the first air outlet or the second air outlet, and the elastic member is used to press the filter onto the adsorption material.

[0029] In this solution, the filter is pressed onto the adsorption material by the elastic member so that the adsorption material will not be too loose, thereby ensuring the effectiveness of adsorption.

[0030] Preferably, the container comprises a cross section perpendicular to the air inlet direction, and the length of the container along the air inlet direction is not less than three times the width of the cross section;

[0031] and / or,

[0032] The width of the cross section is not less than twice the thickness of the cross section.

[0033] In this solution, the length of the container along the air inlet direction is not less than three times the width of the cross section, and the container forms a slender structure, which is suitable for narrow and long installation spaces. The width of the cross section is not less than twice the thickness of the cross section, and the container forms a flat and wide structure, which is suitable for installation spaces with a small thickness.

[0034] Preferably, the adsorption device is provided with at least one end cap detachably connected to the container; two adjacent adsorption chambers are separated by a spacer, and the two ends of the spacer along the air inlet direction are respectively a flush end and a retracted end, the flush end is flush with one end shell or the end cap of the container, and the retracted end is spaced apart from the other end shell or the end cap of the container, the air inlet is provided on the end cap at the flush end, and the second air outlet is provided on the end cap at the retracted end;

[0035] The retracted length of the retracted end is no more than 2% of the length of the container along the air inlet direction.

[0036] In this solution, the above-mentioned indentation length ratio setting is adopted so that the indentation amount is much smaller than the container length, and the raw gas will not flow into the next adsorption chamber from the indentation end too quickly, and a longer flow path is still guaranteed without affecting the adsorption effect.

[0037] A refrigerator is provided with the above-mentioned adsorption device to generate gas for preserving food in the refrigerator.

[0038] In this solution, the refrigerator uses the above-mentioned adsorption device to extend the flow path of the raw gas in the adsorption chamber, so that the adsorbable gas can be more fully adsorbed, improve the adsorption effectiveness and adsorption capacity, and thus improve the concentration and purity of the gas production. During desorption, the adsorbed gas in the two adjacent adsorption chambers can be discharged through the second gas outlet located in the middle, shortening the flow path of the adsorbed gas when it is released, improving the exhaust efficiency during desorption, and not leaving uncleanly discharged gas to affect the subsequent adsorption efficiency, thereby improving the overall adsorption performance.

[0039] The positive and progressive effect of the utility model is that the adsorption device and the refrigerator including the same extend the flow path of the raw gas in the adsorption chamber, so that the adsorbable gas can be more fully adsorbed, the adsorption effectiveness and adsorption capacity are improved, and thus the concentration and purity of the gas production are improved. During desorption, the adsorbed gas in two adjacent adsorption chambers can be discharged through the second gas outlet located in the middle, shortening the flow path of the adsorbed gas when it is released, improving the exhaust efficiency during desorption, and not leaving uncleanly discharged gas to affect the subsequent adsorption efficiency, thereby improving the overall adsorption performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a half-section view of the adsorption device of Example 1 of the utility model.

[0041] Figure 2 This is a half-section view of the container of Example 1 of the present utility model.

[0042] Figure 3 It is a front view of the cross section of the container in Example 1 of the utility model.

[0043] Figure 4 This is a schematic structural diagram of the flush end of the container in Example 1 of the utility model.

[0044] Figure 5 This is a schematic structural diagram of the indented end of the container in Example 1 of the utility model.

[0045] Description of reference numerals:

[0046] Adsorption device 1

[0047] Container 2

[0048] The first adsorption chamber 201

[0049] The second adsorption chamber 202

[0050] Air Inlet 203

[0051] First air outlet 204

[0052] Second air outlet 205

[0053] The connection point 206 between two adjacent adsorption chambers

[0054] Rib 207

[0055] Flush end 208

[0056] Indent end 209

[0057] Front cover 3

[0058] Rear end cover 4

[0059] Divider plate 5

[0060] Filter cotton 6

[0061] Spring 7

[0062] Screw holes 8

[0063] Inlet direction A DETAILED DESCRIPTION

[0064] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0065] Example 1

[0066] The present embodiment provides an adsorption device 1, specifically an adsorption tower, which is filled with molecular sieves or other adsorption materials and is used in equipment such as refrigerators that require adsorption gas production. The raw gas enters the adsorption tower, and the molecular sieve can adsorb the oxygen in the raw gas, and separate the nitrogen in the raw gas (nitrogen is an unadsorbed gas), so that the nitrogen required for preservation in the refrigerator can be produced. When such a molecular sieve adsorption tower is used in a refrigerator, it can perform efficient nitrogen and oxygen separation and quickly create a low-oxygen environment, and can be used to improve the preservation effect of stored fruits and vegetables and other foods. This technology that can perform efficient nitrogen and oxygen separation and quickly create a low-oxygen environment is called pressure swing adsorption nitrogen production technology PSA (Pressure Swing Adsorption).

[0067] like Figure 1-5As shown, the adsorption device 1 includes a container 2, the inner cavity of the container 2 is divided into two adsorption chambers, namely a first adsorption chamber 201 and a second adsorption chamber 202; two adjacent adsorption chambers are connected, and each adsorption chamber is filled with adsorption material.

[0068] An air inlet 203, a first air outlet 204 and a second air outlet 205 are provided on the end cover of the container 2. The container 2 is provided with an air inlet 203 at the starting end of the gas flow, and the air inlet 203 is connected to the first adsorption chamber 201; the container 2 is provided with a first air outlet 204 at the end of the gas flow, and the first air outlet 204 is connected to the second adsorption chamber 202. The adsorption flow path is that the gas enters from the air inlet 203, flows through each interconnected adsorption chamber in turn, and finally discharges the gas not adsorbed by the adsorption material from the first air outlet 204; the container 2 is provided with a second air outlet 205 at the connecting point 206 near the two adjacent adsorption chambers. During desorption, the desorption flow path is from each adsorption chamber to the adjacent second air outlet 205, and the gas adsorbed by the adsorption material is discharged from the second air outlet 205.

[0069] The adsorption device 1 realizes the adsorption and desorption of two gases in the raw gas by controlling the opening or closing combination of the air inlet 203, the first air outlet 204 and the second air outlet 205. During adsorption, the air inlet 203 and the first air outlet 204 are opened, and the second air outlet 205 is closed. The raw gas flows along the adsorption flow path, that is, it enters the adsorption chamber through the air inlet 203 and flows through each adsorption chamber in sequence. The gas pressure in the two adsorption chambers rises accordingly, and the oxygen (adsorbable gas or adsorbed gas) in the raw gas is adsorbed by the molecular sieve material, and the nitrogen (non-adsorbable gas) is discharged from the first air outlet 204, so the first air outlet 204 is also called a nitrogen outlet or a nitrogen outlet. During desorption, the air inlet 203 and the first air outlet 204 are closed, and the second air outlet 205 is opened. The oxygen adsorbed by the molecular sieve material is released, flows along the desorption flow path, and is discharged from the second air outlet 205. Therefore, the second air outlet 205 is also called an oxygen exhaust port or an oxygen exhaust port.

[0070] The adsorption device 1 extends the flow path of the raw material gas in the multiple adsorption chambers by separating the container 2 into two mutually connected adsorption chambers, so that oxygen can be more fully adsorbed, the adsorption effectiveness and adsorption capacity are improved, and thus the concentration and purity of the produced nitrogen are improved. By arranging the second gas outlet 205 at the connecting point 206 of two adjacent adsorption chambers, during desorption, the adsorbed gas in the two adjacent adsorption chambers can be discharged through the second gas outlet 205 in the middle, shortening the flow path of the adsorbed gas when it is released, improving the exhaust efficiency during desorption, and not leaving the gas that is not exhausted to affect the subsequent adsorption efficiency, thereby improving the overall adsorption performance.

[0071] In other embodiments, the size of the adsorption device 1 and the need for the adsorption effect may require more than two adsorption chambers, and multiple connected adsorption chambers may form an S-shaped, multi-tortuous flow path, which can further prolong the process of oxygen adsorption. In this case, multiple second air outlets 205 (oxygen exhaust ports) may be provided between the air inlet 203 and the first air outlet 204, and a second air outlet 205 may be provided between every two adjacent adsorption chambers. In order to improve the adsorption effect or other air intake and outlet needs, multiple air inlets 203 and first air outlets 204 may also be provided. Different adsorption materials may be selected according to the needs of the type of gas production. For example, other types of adsorption materials are used so that the adsorbable gas is nitrogen, and the separated gas is oxygen.

[0072] like Figure 3-5 As shown, the container 2 is specifically a flat, slender tank body, and its cross section reflects a special-shaped structure, that is, a tank body made of an irregularly structured profile. The cross section is divided into two dimensions, width and thickness, and the width of the cross section is not less than twice the thickness of the cross section (size relationship one), and the container 2 forms a flat structure. In this case, the thickness of its cross section can usually be about 20 mm, which conforms to the space characteristics of large-plane and thin-thickness accessories such as refrigerators, is suitable for carrying, and has strong applicability. And adopting such a size relationship ratio ensures a larger volume to accommodate enough molecular sieves.

[0073] At the same time, the length of the container 2 along the air inlet direction is not less than three times the width of the cross section of the container 2 (size relationship two), and the container 2 forms a slender structure suitable for the narrow and long installation space in the refrigerator.

[0074] In this embodiment, the above two size relationships are mainly adapted to the flat, narrow and long installation space in the refrigerator. However, in other embodiments, depending on the different environments in which the adsorption device 1 is used, the size relationship of its shape and cross section can be adjusted according to the needs of the application environment.

[0075] Two adjacent adsorption chambers are separated by a spacer. In this embodiment, the spacer is a rib 207. The rib 207 is arranged along the air inlet direction A and is connected to the inner wall of the container 2 in a direction perpendicular to the air inlet direction A.

[0076] In practical applications, when refrigerators and other electrical appliances use PSA pressure swing adsorption nitrogen production technology, the optimal pressure of PSA pressure swing adsorption is about 0.6-0.8MPa. Under this pressure, the irregular cross-section is more likely to deform than the circular cross-section. For example, an aluminum alloy adsorption tower with a width of 70mm, a thickness of 20mm, and a wall thickness of 2mm will bend and deform perpendicular to the width direction, and the deformation in the central position is the largest. According to calculations, the maximum deformation can reach 1.4mm. Considering the periodic filling and deflation characteristics of the adsorption tower, this is obviously easy to cause fatigue and assembly problems. In this embodiment, the adsorption device 1 is divided into two smaller adsorption chambers by the isolation of the rib 207; and the width and thickness of each adsorption chamber are nearly equal, which improves the strength of the container 2. Preferably, the thickness of the inner wall of the adsorption chamber is set to 20-25mm, which is less than the conventional 45mm thickness, so that the strength of the adsorption chamber and the adsorption tower as a whole is greatly increased, and there is almost no deformation problem. Among them, by connecting the ribs 207 to the inner wall of the container 2, the overall structural strength of the adsorption device 1 is enhanced, making it less likely to deform and able to withstand adsorption treatment at a higher gas pressure, thereby improving the adsorption and desorption processing capabilities.

[0077] In other embodiments, as required, the spacers between the adsorption chambers may also adopt other shapes and structures instead of ribs.

[0078] Among them, Figure 1 As shown, the adsorption device 1 is further provided with two end covers along the air inlet direction, namely a front end cover 3 and a rear end cover 4. The front end cover 3 and the rear end cover 4 are respectively detachably connected to the container 2.

[0079] Two ends of the rib 207 along the air intake direction are a flush end 208 and a retracted end 209 , respectively. The flush end 208 is flush with the front end cover 3 , and the retracted end 209 is spaced apart from the rear end cover 4 .

[0080] The air inlet 203 is provided at a position of the front end cover 3 corresponding to the first adsorption chamber 201 , the first air outlet 204 is provided at a position of the front end cover 3 corresponding to the second adsorption chamber 202 , and the second air outlet 205 is provided on the rear end cover 4 .

[0081] In other embodiments, the adsorption device 1 may also have only one end cap, and the other end is the end shell of the container 2; open the end cap, fill the adsorption material into the container 2 from the end cap, and then cover the end cap to seal the container 2. When there is only one end cap, the air inlet 203 or the air outlet can be directly set on the shell. The end shell can be at the front end of the air inlet, and the flush end 208 of the rib 207 is flush with the end shell; the end shell can also be at the end of the air inlet, and the indented end 209 of the rib 207 is spaced from the end shell.

[0082] However, in this embodiment, the adsorption device 1 adopts the form of having end caps at both ends, providing a more flexible assembly structure, and both ends can be filled with adsorption materials. Both ends are respectively provided with diversion and filtering materials to obtain better adsorption effect and discharge pure gas. The raw gas enters from the air inlet 203 of the front end cover 3, and the nitrogen flows from the first adsorption chamber 201 through the second adsorption chamber 202, and then flows out from the first air outlet 204 of the front end cover 3 on the same side. Compared with only one adsorption chamber, the gas flow path is doubled, and the adsorption is more sufficient. Through the above-mentioned setting of the two ends of the rib 207, the adsorption chamber is not conductive at the flush end 208 of the rib 207, and the interval between the indented end 209 and the rear end cover 4 forms a space that connects the two adjacent adsorption chambers, so that during desorption, the adsorbed gas in the two adjacent adsorption chambers can be discharged from the second air outlet 205 at the indented end 209, shortening the flow path of the released gas and improving the exhaust efficiency of desorption. The second gas outlet 205 is arranged at the center of the gas flow path, and the gas release flow paths of the two adsorption chambers are the same, thereby improving the desorption and exhaust efficiency.

[0083] In other embodiments, when there are more than two adsorption chambers, multiple connected adsorption chambers form a multiple tortuous flow path, and the setting position of the connection 206 between each two adjacent adsorption chambers can be adjusted accordingly as needed, as long as the sum of the paths of the gas flowing through all the adsorption chambers is greater than the gas flow path of any one of the adsorption chambers, the flow path is also extended compared to the case of a single adsorption chamber. In order to ensure the extension of the gas adsorption flow path, preferably, at least one group of the connection between two adjacent adsorption chambers is set at a position higher than half of the length of the container along the gas flow direction (here, the gas flow direction is the inlet direction A), so that the sum of the paths of the gas flowing through all the adsorption chambers can still ensure that the gas flow path is greater than that of one adsorption chamber, and will not enter the next adsorption chamber too early. In addition, when the connection 206 is set near the end cover of the container, the connection 206 can be close to the front cover 3 or the rear cover 4; at this time, the position of the second gas outlet 205 can be on the front cover 3, on the rear cover 4, or on both end covers to meet the needs of rapid exhaust. At this time, the first gas outlet 204 (nitrogen exhaust port) is not necessarily located on the front end cover 3, but is located on the end cover at the end of the air flow. However, in this embodiment, the air inlet 203 and the first gas outlet 204 are located on the same end cover (front end cover), which is convenient for unified control and simultaneous opening or closing.

[0084] In this embodiment, the indentation length of the indentation section is preferably 10 mm, which is much smaller than the length of the adsorption tower container 2. Due to the high fluidity of the gas, this size does not hinder the turning and circulation of the gas, and at the same time improves the gas flow path as much as possible. In other embodiments, the indentation length can be adjusted accordingly according to the effect requirements, but generally, the indentation length of the indentation end 209 is not greater than 2% of the length of the container 2 along the gas flow direction, so that the indentation amount is much smaller than the length of the container 2, and the raw gas will not flow into the next adsorption chamber from the indentation end 209 too quickly, and a longer flow path is still guaranteed without affecting the adsorption effect.

[0085] In this embodiment, the connecting point 206 between two adjacent adsorption chambers is arranged at the end of the container 2 along the air inlet direction A, that is, at the end of the first adsorption chamber 201 along the gas flow direction (the gas flow direction of the first adsorption chamber is the air inlet direction A), instead of setting a connecting structure at a certain position in the middle of the rib 207 along the air inlet direction A, to ensure that the path of the airflow in the adsorption chamber is the longest path, and will not enter the next adsorption chamber too early. Such a connecting point position is a better setting choice.

[0086] In this embodiment, the connecting space between two adjacent adsorption chambers is realized by the spacing between the indented end of the rib and the end cover, but in other embodiments, there are various structures for connecting the two adsorption chambers, for example, holes can be opened on the rib or connecting pipes can be added.

[0087] like Figure 1 As shown, the two adsorption chambers are further provided with a diverter plate 5 perpendicular to the air inlet direction near the front end cover 3. The diverter plates 5 of the two adsorption chambers are respectively close to the air inlet 203 and the first air outlet 204. A plurality of diverter holes are provided on the diverter plate 5. The diverter plate 5 is spaced apart from the front end cover 3.

[0088] Through the above-mentioned splitter plate 5, the raw gas is buffered between the splitter plate 5 and the front cover 3, reducing the impact of the incoming gas on the adsorption material, which is conducive to ensuring the adsorption capacity of the adsorption material. By setting a plurality of splitter holes on the splitter plate 5, the raw gas is divided into small streams, which is conducive to rapid and full adsorption and improves the adsorption effectiveness.

[0089] like Figure 1 As shown, the container 2 is provided with a filter at the second air outlet 205. In this embodiment, the filter is specifically filter cotton. In other embodiments, other materials or components with filtering functions may also be used. The filter cotton 6 is arranged perpendicular to the air inlet direction, the filter cotton 6 is arranged on the surface of the adsorption material, and the filter cotton 6 is spaced apart from the rear end cover 4.

[0090] The filter cotton 6 provided above filters impurities in the flowing gas, making the gas purer.

[0091] Among them, an elastic member is provided between the rear end cover 4 and the filter cotton 6. In this embodiment, the elastic member is specifically a spring 7, which is used to press the filter cotton 6 onto the adsorption material. The filter cotton 6 is pressed onto the adsorption material by the spring 7, so that the adsorption material is not too loose, thereby ensuring the effectiveness of adsorption.

[0092] like Figure 1 As shown, the adsorption device 1 has a plurality of screw holes 8 arranged inside the container 2 along the width direction in addition to the two ends in the width direction, which are used to lock and fix with the end cover; this can increase the fixing strength of the end cover and prevent the end cover from being compressed and warped when the adsorption device 1 is inflated and pressurized.

[0093] When the adsorption device 1 of the above structure is used to produce gas, the adsorption device 1 works as follows:

[0094] First, on one side of the adsorption device 1, the air inlet 203 and the first air outlet 204 (nitrogen production port) on the front cover 3 are opened, and on the other end of the adsorption device 1, the second air outlet 205 (oxygen exhaust port) on the rear cover 4 is closed, and the raw material air enters the first adsorption chamber 201, and enters the second adsorption chamber 202 along the air inlet direction at the end of the first adsorption chamber 201 and the connection with the second adsorption chamber 202, and turns to flow. Due to the entry of the raw material gas, the gas pressure in the two adsorption chambers rises, and the oxygen component is adsorbed by the molecular sieves in the two adsorption chambers. The remaining nitrogen flows out through the nitrogen production port and is collected and used;

[0095] After a certain period of time, on one side of the adsorption device 1, the air inlet 203 and the nitrogen production port on the front cover 3 are closed, and on the other end of the adsorption device 1, the oxygen exhaust port on the rear cover 4 is opened, and the oxygen adsorbed by the molecular sieves in the two adsorption chambers is desorbed and released, and discharged to the outside through the oxygen exhaust port on the rear cover 4;

[0096] By cyclically carrying out the above two steps, nitrogen can be produced continuously and used in the refrigerator to create a high-nitrogen and low-oxygen environment for storing fruits and vegetables.

[0097] In other embodiments, the adsorption device can also be applied to other equipment that requires adsorption gas production. According to the type and size of the equipment, the size, shape, number of adsorption chambers, etc. of the adsorption device can be adjusted accordingly.

[0098] Example 2

[0099] The present embodiment provides a refrigerator, which is equipped with an adsorption device 1 as in Example 1 to generate gas for preservation in the refrigerator. By adopting the above-mentioned adsorption device 1, the refrigerator prolongs the flow path of the raw gas in the adsorption chamber, so that the adsorbable gas can be more fully adsorbed, improves the adsorption effectiveness and adsorption capacity, and thus improves the concentration and purity of the gas production. During desorption, the adsorbed gas in two adjacent adsorption chambers can be discharged through the second gas outlet 205 located in the middle, shortening the flow path of the adsorbed gas when it is released, improving the exhaust efficiency during desorption, and not affecting the subsequent adsorption efficiency, thereby improving the overall adsorption performance.

[0100] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. An adsorption device, characterized in that: The adsorption device comprises a container, wherein the inner cavity of the container is divided into at least two mutually connected adsorption chambers, and the connection point between each two adjacent adsorption chambers is configured so that the sum of the paths through which the gas flows through all the adsorption chambers is greater than the path through which the gas flows through any one of the adsorption chambers, and each of the adsorption chambers is filled with an adsorption material; The container is provided with an air inlet at the start of the gas flow, and a first air outlet at the end of the gas flow, and the adsorption flow path is that the gas enters from the air inlet, flows through the mutually connected adsorption chambers in sequence, and finally discharges the gas not adsorbed by the adsorption material from the first air outlet; The container is provided with a second gas outlet near or directly opposite to the connection between each two adjacent adsorption chambers, and the desorption flow path is from each adsorption chamber to the adjacent second gas outlet, and the gas adsorbed by the adsorption material is discharged from the second gas outlet.

2. The adsorption device according to claim 1, characterized in that: The connecting point between at least one group of two adjacent adsorption chambers is arranged at a position higher than half of the length of the container along the gas flow direction.

3. The adsorption device according to claim 1, characterized in that: The adsorption device is provided with at least one end cap, and the end cap is detachably connected to the container; Two adjacent adsorption chambers are separated by a spacer, and the spacer is arranged along the air intake direction; The two ends of the spacer along the air inlet direction are respectively a flush end and a retracted end, the flush end is flush with one end shell of the container or the end cover, and the retracted end is spaced apart from the other end shell of the container or the end cover.

4. The adsorption device according to claim 3, characterized in that: The inner cavity of the container is divided into two adsorption chambers, namely a first adsorption chamber and a second adsorption chamber. Both ends of the adsorption device are provided with a front cover and a rear cover, and the front cover and the rear cover are respectively detachably connected to the container; The flush end is flush with the front end cover, and the indented end is spaced apart from the rear end cover; The air inlet is arranged at a position of the front end cover corresponding to the first adsorption chamber, the first air outlet is arranged at a position of the front end cover corresponding to the second adsorption chamber, and the second air outlet is arranged on the rear end cover.

5. The adsorption device according to claim 3, characterized in that: The container is provided with a diverter plate near the air inlet, the diverter plate is arranged perpendicular to the air inlet direction, a plurality of diverter holes are arranged on the diverter plate, and the diverter plate is spaced apart from the shell or the end cover at one end of the container near the air inlet; And / or, the container is provided with a diverter plate near the first air outlet, the diverter plate is arranged perpendicular to the air inlet direction, a plurality of diverter holes are provided on the diverter plate, and the diverter plate is spaced apart from the end shell or the end cover of the container near the first air outlet.

6. The adsorption device according to claim 3, characterized in that: The container is provided with a filter at the first air outlet or the second air outlet. The filter is arranged perpendicular to the air inlet direction and is arranged on the surface of the adsorption material.

7. The adsorption device according to claim 6, characterized in that: An elastic member is provided between the filter and the end shell or the end cover of the container at the first air outlet or the second air outlet, and the elastic member is used to press the filter onto the adsorption material.

8. The adsorption device according to any one of claims 1 to 7, characterized in that: The container comprises a cross section perpendicular to the air inlet direction, and the length of the container along the air inlet direction is not less than three times the width of the cross section; And / or, the width of the cross section is not less than twice the thickness of the cross section.

9. The adsorption device according to claim 8, characterized in that: The adsorption device is provided with at least one end cap detachably connected to the container; two adjacent adsorption chambers are separated by a spacer, and the two ends of the spacer along the air inlet direction are respectively a flush end and a retracted end, the flush end is flush with one end shell or the end cap of the container, and the retracted end is spaced apart from the other end shell or the end cap of the container, the air inlet is provided on the end cap at the flush end, and the second air outlet is provided on the end cap at the retracted end; The retracted length of the retracted end is no more than 2% of the length of the container along the air inlet direction.

10. A refrigerator, characterized in that: The refrigerator is equipped with an adsorption device as described in any one of claims 1 to 9 to generate gas for preserving freshness in the refrigerator.

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