Absorption device

Abstract

The invention relates to the technical field of acid mist recovery, in particular to an absorption device. The absorption device comprises a shell, the shell is made of a transparent insulating material, the shell comprises an air inlet end and an air outlet end, and a first water absorption layer, a first absorption layer and a second absorption layer are sequentially arranged in the shell in a stacked mode in the direction from the air inlet end to the air outlet end; wherein the first absorption layer comprises a reactant and a color developing agent, the reactant is used for reacting with a to-be-recycled object, and the color developing agent is used for displaying different colors according to the concentration of the reactant; the second absorption layer comprises an adsorption material, and the adsorption material is used for absorbing to-be-recycled materials which do not participate in the reaction. The absorption device is small and exquisite in structure, safe to use, convenient to operate and high in detection efficiency, and the to-be-recycled amount participating in the reaction can be speculated by directly observing the color of the color developing agent with naked eyes.

Description

Technical Field

[0001] The invention relates to the technical field of acid mist recovery, in particular to an absorption device. Background Art

[0002] Valve-regulated lead-acid batteries are commonly used as backup power sources in data centers because of their stability, maintenance-free, and high economic benefits. However, during use, valve-regulated lead-acid batteries will release gas and acid mist due to their own performance degradation. The acid mist will accumulate in the room, which is not good for the health of the staff in the computer room and may corrode electrical equipment in severe cases. In addition, the manufacturing process of single batteries in the same batch is also different. After a long period of use, the contact surface of the negative pole connector of some batteries will rust. Once arcing occurs, it is very easy to ignite the escaped gas stored in the battery, causing an explosion.

[0003] At present, the related devices used to detect and absorb the acid mist emitted by lead-acid batteries are usually complex in structure, bulky in size and have low detection efficiency. For example, some devices require the installation of battery sleeves for each single battery in turn to wrap the single battery inside, which is difficult to construct. Moreover, when the battery pack emits acid mist, the maintenance personnel need to test all the single batteries in the battery pack in turn to find the single battery whose capacity does not meet the regulations, which is a large and arduous workload. Summary of the invention

[0004] The invention provides an absorption device, which is used to solve the problems that the existing absorption device for acid mist emitted from lead-acid batteries has a complex structure and low detection efficiency.

[0005] In the first aspect, an embodiment of the present application provides an absorption device, which includes a shell, the shell is made of transparent insulating material, the shell includes an air inlet end and an exhaust end, and in the direction from the air inlet end to the exhaust end, a first water absorption layer, a first absorption layer and a second absorption layer are sequentially stacked in the shell; wherein the first absorption layer includes a reactant and a color developer, the reactant is used to react with the recyclable material, and the color developer is used to display different colors according to the concentration of the reactant; the second absorption layer includes an adsorption material, and the adsorption material is used to absorb the recyclable material that has not participated in the reaction.

[0006] During use, the recyclables, such as the acid mist and gas emitted by the lead-acid battery, can enter the interior of the shell through the air inlet end, the first water absorbing layer absorbs the moisture in the recyclables, the reactants in the first absorbing layer can react with the acid mist, and at the same time, the developer can change color according to the concentration of the reactants. Therefore, the concentration of the reactants can be judged by the color of the developer, so as to calculate the amount of acid mist reacting with the reactants. In addition, a small amount of unabsorbed acid mist can be absorbed by the second absorbing layer, and the gas that does not participate in the reaction and is not absorbed can be discharged to the outside of the shell through the exhaust end. The above-mentioned absorption device has a compact structure and is safe to use. Moreover, the amount of the recyclables that participate in the reaction can be inferred by directly observing the color of the developer with the naked eye. It is easy to operate and has a high detection efficiency.

[0007] In a possible implementation manner, the first absorption layer further includes a porous material for carrying reactants and color developers, the reactants are alkaline solutions; and / or the color change range of the color developer corresponds to a pH range of 4-10.

[0008] In a possible implementation manner, the liquid content in the first absorption layer is less than 20%; and / or the porous material is a fiber material or a molecular sieve.

[0009] In a possible implementation manner, the alkaline solution is selected from at least one of potassium hydroxide solution, sodium hydroxide solution, calcium hydroxide solution and sodium carbonate solution; and / or the color developer is selected from at least two of methyl red, bromocresol green, fuchsin, bromothymol blue and phenolphthalein.

[0010] In a possible implementation manner, the adsorption material is a porous material; and / or, along the direction from the air inlet end to the exhaust end, the size of the second absorption layer is 1.5-2 times the size of the first absorption layer.

[0011] In a possible implementation manner, the shell is a silica gel shell; and / or the exhaust end includes a plurality of exhaust holes penetrating the shell.

[0012] In a possible implementation manner, the air inlet end comprises a breathable material layer, the breathable material layer is arranged on a side of the first water absorbing layer away from the first absorption layer, and the breathable material layer and the shell are surrounded to form a closed accommodating cavity.

[0013] In a possible implementation manner, the absorption device includes a first waterproof layer disposed between the first water absorption layer and the first absorption layer; and / or the absorption device includes a second waterproof layer disposed between the first absorption layer and the second absorption layer.

[0014] In a possible implementation manner, the absorption device further includes a second water absorption layer disposed between the second waterproof layer and the second absorption layer.

[0015] In a possible implementation manner, the first waterproof layer is a neutral fiber layer; and / or, the second waterproof layer is a neutral fiber layer; and / or, the first water-absorbing layer is a silica gel particle layer; and / or, the second water-absorbing layer is a silica gel particle layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of an absorption device provided in one embodiment of the present application;

[0017] Figure 2 A schematic structural diagram of an absorption device provided in another embodiment of the present application;

[0018] Figure 3 A schematic structural diagram of an absorption device provided in yet another embodiment of the present application;

[0019] Figure 4 A schematic diagram of the structure of an absorption device provided in yet another embodiment of the present application;

[0020] Figure 5 A front view of an absorption device installed on a battery provided in one embodiment of the present application;

[0021] Figure 6 A top view of an absorption device installed on a battery provided in one embodiment of the present application;

[0022] Figure 7 A front view of an absorption device installed on a battery provided in another embodiment of the present application;

[0023] Figure 8 A top view of an absorption device installed on a battery according to another embodiment of the present application.

[0024] Reference numerals: 100 - housing; 110 - air inlet end; 120 - exhaust end; 200 - first water absorption layer; 300 - first absorption layer; 400 - second absorption layer; 500 - breathable material layer; 600 - first waterproof layer; 700 - second waterproof layer; 800 - second water absorption layer;

[0025] 10-absorption device; 20-battery; 21-first pole; 22-second pole;

[0026] 01-exhaust hole; 02-intake hole; 03-outlet hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] Figure 1 This is a schematic diagram of the structure of an absorption device provided in an embodiment of the present application, referring to Figure 1 The embodiment of the present application provides an absorption device 10, which includes a shell 100, which is made of transparent insulating material. The shell 100 includes an air inlet end 110 and an air outlet end 120. Along the direction D1 from the air inlet end 110 to the air outlet end 120, a first water absorption layer 200, a first absorption layer 300 and a second absorption layer 400 are sequentially stacked in the shell 100. Among them, the first absorption layer 300 includes a reactant and a color developer, the reactant is used to react with the recyclable material, and the color developer is used to display different colors according to the concentration of the reactant; the second absorption layer 400 includes an adsorption material, and the adsorption material is used to absorb the recyclable material that has not participated in the reaction.

[0029] The recyclables may be acid mist released by lead-acid batteries, or waste gas generated by automobile exhaust, coal combustion, etc. It is understandable that for different recyclables, suitable reactants and display agents can be selected. Later, the staff can compare the color of the first absorption layer 300 with the color card to determine the amount of recyclables absorbed by the first absorption layer 300.

[0030] It is understandable that the housing 100 is made of a transparent material, which is convenient for the staff to observe the color of the developer. In addition, when the recyclable material is the acid mist released by the lead-acid battery, the absorption device 10 needs to be installed on the surface of the lead-acid battery, and the housing 100 is made of an insulating material to avoid interference between the housing 100 and the lead-acid battery. Exemplarily, the housing 100 can be a silica gel shell.

[0031] The first water absorbing layer 200 can absorb water vapor to prevent the water vapor from affecting the first absorbing layer 300. The first water absorbing layer 200 can be a silica gel particle layer or other water absorbing materials.

[0032] Continue to refer to Figure 1 The exhaust end 120 includes a plurality of exhaust holes 01 penetrating the shell 100, so that the gas that does not participate in the reaction and is not absorbed is discharged from the exhaust holes 01 to the outside of the shell 100. The gas emitted from the lead-acid battery along with the acid mist mainly includes hydrogen and oxygen. Hydrogen and oxygen do not react with the reactants and cannot be absorbed by the second absorption layer 400, and can be discharged through the exhaust holes 01.

[0033] In a possible implementation, the air inlet 110 includes a breathable material layer 500, which is disposed on a side of the first water absorbing layer 200 that is away from the first absorption layer 300, and the breathable material layer 500 and the housing 100 are arranged to form a closed accommodation cavity, and the first water absorbing layer 200, the first absorption layer 300, and the second absorption layer 400 are all located in the above accommodation cavity. The breathable material layer 500 allows the gas to be recovered to enter the accommodation cavity through the breathable material layer 500.

[0034] Exemplarily, the material of the air permeable material layer 500 includes but is not limited to fiber material, cotton cloth, non-woven fabric, etc. Optionally, the material of the air permeable material layer 500 is an antistatic insulating material to avoid interference between the air permeable material layer 500 and the lead-acid battery.

[0035] Figure 2 A schematic diagram of the structure of an absorption device provided in another embodiment of the present application, referring to Figure 2 The shell 100 is arranged to form a closed accommodating cavity, the exhaust end 120 includes a plurality of exhaust holes 01 penetrating the shell 100, and the air inlet end 110 also includes a plurality of air inlet holes 02 penetrating the shell 100, and the air inlet holes 02 allow the gas to be recovered to enter the interior of the shell 100 from the air inlet holes 02.

[0036] In a possible implementation, the first absorption layer 300 further includes a porous material for carrying reactants and color developers, wherein the porous material may be a fiber material or a molecular sieve, which can not only carry reactants and color developers, but also absorb the gas to be recovered.

[0037] Optionally, the reactant is an alkaline solution. Specifically, the alkaline solution is selected from at least one of a potassium hydroxide solution, a sodium hydroxide solution, a calcium hydroxide solution and a sodium carbonate solution.

[0038] In a possible implementation manner, the color change range of the color developer corresponds to a pH range of 4-10. The color developer is selected from organic weak acids or organic weak bases such as methyl red, bromocresol green, bromothymol blue and phenolphthalein. Exemplarily, the color developer may include methyl red, bromocresol green and bromothymol blue.

[0039] The constituent materials of the first absorption layer 300 are introduced above, and the preparation method of the first absorption layer 300 is described below.

[0040] Optionally, the reactant in the first absorption layer 300 is an alkaline solution, such as a mixed solution of KOH and NaOH. The color developer includes methyl red, bromocresol green, bromothymol blue, etc. The porous material is a neutral fiber layer. The preparation method of the first absorption layer 300 includes the following steps:

[0041] 1) Dissolve 400 mg of alkaline solid in distilled water and dilute to 1 liter to prepare an alkaline solution with a concentration of 0.01 mol / L;

[0042] 2) Alkaline solution is mixed with a developer to obtain a dark blue-purple solution, and the neutral fiber layer is soaked with the solution, and the liquid content is controlled to be below 20% to obtain an alkaline fiber layer, which is the first absorption layer 300 .

[0043] When the escaped gas carrying acid mist enters the containing cavity through the air inlet end 110, the alkaline fiber layer undergoes an acid-base neutralization reaction, and the color of the color developer changes with the pH value of the solution. The staff can judge whether the battery has acid mist escape by distinguishing the color of the alkaline fiber layer during the inspection. Among them, the initial color of the alkaline fiber layer is dark blue-purple, and it will gradually turn into blue, dark green, and finally orange-yellow after absorbing the acid mist. The different colors reflect the content of acid mist absorbed by the first absorption layer 300. When the alkaline fiber layer turns dark green, the absorption device 10 fails and needs to be replaced with a new absorption device 10.

[0044] The amount of reactants used is calculated as follows:

[0045] The national standard GB / T 19638.1-2014 "Stationary Valve-regulated Lead-acid Batteries Part 1 Technical Requirements" requires that the amount of acid mist precipitated for every 1Ah of battery charging capacity should not exceed 0.025mg. According to the amount of acid mist precipitated for every 1Ah of battery charging capacity is 0.025mg, the reactant is a monobasic alkali, and the stoichiometric ratio of the monobasic alkali to sulfuric acid is 2:1, it can be calculated according to the chemical equilibrium equation:

[0046]

[0047] Where:

[0048] V OH ——volume of lye, ml;

[0049] I——floating charge current, A;

[0050] 24×30——float charge time, 24 hours×30 days;

[0051] n 单 ——Number of battery cells, pieces;

[0052] c——alkali solution concentration, mol / L;

[0053] 49.04——The molar mass of 0.5 mol of sulfuric acid, g / mol.

[0054] Therefore, the maximum amount of acid precipitation per month can be calculated based on the actual working parameters of the battery, and the corresponding volume of alkaline solution can be prepared and loaded into the absorption device. When the alkaline fiber layer changes from alkaline color (dark blue-purple) to neutral color (dark green), it means that the battery has reached the maximum amount of acid precipitation and needs to be replaced as soon as possible.

[0055] According to the double sulfation theory, the gassing of lead-acid batteries is caused by the sulfation of the plates during the charge and discharge process, which causes the battery to lose water, resulting in an increase in internal resistance and a decrease in battery capacity. Therefore, by studying parameters such as the amount of acid precipitation, current, and voltage, a model of the change in battery internal resistance can be obtained. Considering that current, voltage, and acid precipitation also have mutual influences on each other, this application uses ridge regression analysis to process the acid precipitation, current, and voltage data to obtain a model of the change in battery internal resistance with the amount of acid precipitation. The specific model establishment method is as follows:

[0056] Ridge regression sets the internal resistance of the battery as Y, the influencing variables are current X1, voltage X2, acid precipitation amount X3, and establishes a multivariate linear variable regression model: Y = C + C1X1 + C2X2 + C3X3;

[0057] Among them, the appropriate ridge parameter k is set, and the ridge regression analysis method is used to calculate the C1, C2, and C3 values. 2 Determine whether the result is reasonable. If not, adjust the ridge parameter k and recalculate. If reasonable, the relationship model between the change of battery internal resistance and current, voltage and acid precipitation parameters can be obtained.

[0058] It is understandable that the second absorption layer 400 is used to absorb the unreacted recyclables. Optionally, the adsorption material in the second absorption layer 400 may be a porous material. Specifically, the adsorption material may be activated carbon or molecular sieve.

[0059] Continue to refer to Figure 1 and Figure 2 , along the direction D1 from the air inlet end 110 to the exhaust end 120, the size of the second absorption layer 400 is 1.5-2 times the size of the first absorption layer 300, and the size of the second absorption layer 400 is relatively large, so as to more fully absorb the recyclables that have not participated in the reaction. Optionally, along the direction from the air inlet end 110 to the exhaust end 120, the size of the first absorption layer 300 and the first water absorption layer 200 are the same. It can be understood that by controlling the appropriate size (height) of each layer so that the absorption device 10 in the present application has a suitable height, thereby saving space, when recycling the recyclables, the probability of interference with other components can be reduced, thereby better adapting to different detection environments.

[0060] Figure 3 A schematic diagram of the structure of an absorption device provided in another embodiment of the present application, referring to Figure 3The absorbent device 10 includes a first waterproof layer 600 disposed between the first water absorbing layer 200 and the first absorbing layer 300. The first waterproof layer 600 can not only isolate the first water absorbing layer 200 and the first absorbing layer 300 to prevent the moisture in the first water absorbing layer 200 from entering the first absorbing layer 300, but also support the first absorbing layer 300. Optionally, the first waterproof layer 600 can be a neutral fiber layer or other breathable waterproof material layer.

[0061] Continue to refer to Figure 3 The absorption device 10 further includes a second waterproof layer 700 disposed between the first absorption layer 300 and the second absorption layer 400. The second waterproof layer 700 can isolate the first absorption layer 300 and the second absorption layer 400 to prevent moisture in the second absorption layer 400 from entering the first absorption layer 300. Optionally, the second waterproof layer 700 is a neutral fiber layer or other waterproof and breathable material layer 500.

[0062] Figure 4 A schematic diagram of the structure of an absorption device provided in another embodiment of the present application, referring to Figure 4 The absorption device 10 further includes a second water absorbing layer 800 disposed between the second waterproof layer 700 and the second absorption layer 400. The second water absorbing layer 800 can absorb the moisture in the gas that escapes after the reaction of the first absorption layer 300, so as to improve the absorption efficiency of the second absorption layer 400. Optionally, the second water absorbing layer 800 can be a water absorbing material such as a silica gel particle layer, a sponge material or a cotton material.

[0063] It is understandable that the height of the first waterproof layer 600 , the second waterproof layer 700 or the second water absorbing layer 800 is not limited in the present application. Optionally, the height of the first waterproof layer 600 , the second waterproof layer 700 or the second water absorbing layer 800 is the same as the height of the first absorption layer 300 .

[0064] When the detection device is used to absorb acid mist of a lead-acid battery, the width of the detection device can be the same as the width of the lead-acid battery, and the length of the detection device is smaller than the length of the battery, so as to expose the pole of the lead-acid battery.

[0065] Figure 5 A front view of an absorption device installed on a battery provided in one embodiment of the present application, Figure 6 A top view of an absorption device installed on a battery according to an embodiment of the present application, referring to Figure 5 and Figure 6The shape of the air outlet 03 of the battery 20 is rectangular and flush with the surface of the battery 20. The absorption device 10 in the present application can be adhered to the surface of the lead-acid battery 20 and cover the air outlet 03 by using sealant. It should be noted that when the air inlet end 110 is a breathable material layer 500, the sealant can be applied to the shell 100, and the breathable material layer 500 does not need to be applied or the sealant is only applied around the breathable material layer 500. In addition, the absorption device 10 cannot cover the first pole 21 and the second pole 22 of the battery 20.

[0066] Figure 7 A front view of an absorption device installed on a battery provided in another embodiment of the present application, Figure 8 A top view of an absorption device installed on a battery according to another embodiment of the present application, referring to Figure 7 and Figure 8 The gas outlet 03 of the battery 20 is circular in shape and protrudes from the surface of the battery 20. The absorption device 10 in the present application can be adhered to the surface of the lead-acid battery 20 and cover the gas outlet 03 by using sealant. The gas outlet 03 is protruding above the battery 20. Then, the absorption device 10 in the present application can be put on the safety valve and fixed with sealant, and the absorption device 10 cannot cover the first pole 21 and the second pole 22 of the battery 20.

[0067] The absorption device in the present application is described in detail below with reference to the embodiments.

[0068] Example 1

[0069] Example 1 is an absorption device, referring to Figure 4 The absorption device 10 includes a shell 100 made of transparent silica gel, the shell 100 includes an air inlet end 110 and an exhaust end 120, the air inlet end 110 is provided with a breathable and antistatic fiber layer, the fiber layer and the shell 100 are surrounded to form a receiving cavity, the exhaust end 120 is provided with an exhaust hole 01 penetrating the shell 100, and the first water absorption layer 200, the first waterproof layer 600, the first absorption layer 300, the second waterproof layer 700, the second water absorption layer 800 and the second absorption layer 400 are sequentially stacked in the shell 100 along the direction from the air inlet end 110 to the exhaust end 120. Among them, the first absorption layer 300 includes a reactant and a color developer, and the reactant is a mixed solution of KOH and NaOH. The color developer includes methyl red, bromocresol green, bromothymol blue, etc. The porous material is a neutral fiber layer, and the reactant and the color developer infiltrate the neutral fiber layer to form an alkaline fiber layer. The second absorption layer 400 is an activated carbon layer. The first water-absorbing layer 200 and the second water-absorbing layer 800 are both silica gel particle layers, and the first waterproof layer 600 and the second waterproof layer 700 are both neutral fiber layers.

[0070] The absorption device is used to absorb the acid mist of lead-acid batteries. The battery is usually in a floating charge state. The normal floating charge current is generally less than 50mA / 100Ah, and the maximum should not exceed 150mA / 100Ah. Taking the common lead-acid battery on the market as an example, calculate the relevant parameters of the absorption device.

[0071] Table 1 Technical parameters of lead-acid batteries

[0072]

[0073] Among them, the distance from the pole to the edge of the lead-acid battery is 50 mm. The height of the first absorption layer (alkaline fiber layer) in the absorption device for the lead-acid battery is calculated according to the above formula:

[0074]

[0075] Assuming that the height of the second absorption layer is twice that of the first absorption layer, and the heights of other layers are consistent with the height of the first absorption layer, the total height of the absorption device is h=3.38×(5+2)=23.66 mm.

[0076] In summary, the absorption device has the following advantages:

[0077] 1) The escaped gas comes into contact with the alkaline fiber layer after passing through the silica gel particle layer and the neutral fiber layer. After the acidic components in the escaped gas undergo a chemical reaction on the surface of the alkaline fiber layer, the unreacted components continue to escape upward to the activated carbon layer. The activated carbon layer is accumulated on the upper part of the device by overfilling, and the remaining acid mist is stored in the activated carbon pores by physical adsorption. The remaining gases (hydrogen and oxygen) that neither participate in the reaction nor can be absorbed by the activated carbon can escape into the environment through the exhaust holes on the shell, which can effectively avoid the problem of indoor accumulation of acid mist emitted by lead-acid batteries, ensure the air environment and quality of the battery room, and protect the personal safety of batteries and maintenance personnel.

[0078] 2) When in use, just stick the absorption device on the upper part of the lead-acid battery, which is easy to operate. Taking the 200Ah battery on the market as an example, according to the battery inspection time of once a month, the height of the absorption device is only 2.4cm, which can meet the on-site installation conditions.

[0079] 3) The manufacturing cost of the absorption device is low. After the absorption device is found to be discolored, the absorption device can be removed and replaced with a new one without special treatment, which saves time and effort.

[0080] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An absorption device, characterized in that: The shell comprises a shell, the shell is made of a transparent insulating material, the shell comprises an air inlet end and an air outlet end, and a first water absorbing layer, a first absorption layer and a second absorption layer are sequentially stacked in the shell in a direction from the air inlet end to the exhaust end; Wherein, the first absorption layer includes a reactant and a color developer, the reactant is used to react with the material to be recycled, and the color developer is used to display different colors according to the concentration of the reactant; The second absorption layer includes an adsorption material, and the adsorption material is used to absorb the to-be-recyclable material that has not participated in the reaction.

2. The absorption device according to claim 1, characterized in that The first absorption layer further comprises a porous material for carrying the reactant and the developer, wherein the reactant is an alkaline solution; And / or, the color change range of the developer corresponds to a pH range of 4-10.

3. The absorption device according to claim 2, characterized in that The liquid content of the first absorbent layer is less than 20%; And / or, the porous material is a fiber material or a molecular sieve.

4. The absorption device according to claim 2, characterized in that The alkaline solution is selected from at least one of potassium hydroxide solution, sodium hydroxide solution, calcium hydroxide solution and sodium carbonate solution; And / or, the color developer is selected from at least two of methyl red, bromocresol green, bromothymol blue, fuchsin and phenolphthalein.

5. The absorption device according to any one of claims 1 to 4, characterized in that: The adsorption material is a porous material; and / or, along the direction from the air inlet end to the air outlet end, the size of the second absorption layer is 1.5-2 times the size of the first absorption layer.

6. The absorption device according to any one of claims 1 to 5, characterized in that: The shell is a silica gel shell; and / or the exhaust end includes a plurality of exhaust holes penetrating the shell.

7. The absorption device according to any one of claims 1 to 6, characterized in that: The air inlet end comprises an air-permeable material layer, which is arranged on a side of the first water-absorbing layer away from the first absorption layer, and the air-permeable material layer and the shell are arranged to form a closed accommodating cavity.

8. The absorption device according to any one of claims 1 to 7, characterized in that: The absorption device comprises a first waterproof layer disposed between the first water-absorbing layer and the first absorption layer; and / or the absorption device comprises a second waterproof layer disposed between the first absorption layer and the second absorption layer.

9. The absorption device according to claim 8, characterized in that The absorption device further comprises a second water absorption layer disposed between the second waterproof layer and the second absorption layer.

10. The absorption device according to claim 9, characterized in that The first waterproof layer is a neutral fiber layer; and / or, the second waterproof layer is a neutral fiber layer; and / or, the first water-absorbing layer is a silica gel particle layer; and / or, the second water-absorbing layer is a silica gel particle layer.

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