Carbon fiber based air duct sealing plate and refrigerator

Abstract

This invention provides a carbon fiber-based air duct sealing plate and a refrigerator. The carbon fiber-based air duct sealing plate includes: a first breathable membrane, an activated carbon fiber sheet, and a second breathable membrane; the first breathable membrane is stacked sequentially with the activated carbon fiber sheet and the second breathable membrane; the pore diameter of the first breathable membrane and the pore diameter of the second breathable membrane are both 0.1μm-10μm; the activated carbon fiber sheet has a multi-layer composite structure, including at least two carbonized fiber layers and airflow channels disposed between adjacent carbonized fiber layers. Odor molecules are guided into the refrigerator through the first breathable membrane, and the multi-layer structure of the activated carbon fiber sheet and the airflow channels prolong odor retention and increase contact. The odor is efficiently adsorbed by the multi-layered carbonized fibers, solving the problem of odors when the refrigerator is opened.

Description

Technical Field

[0001] This application relates to the field of home appliance technology, and in particular to a carbon fiber-based air duct sealing plate and a refrigerator. Background Technology

[0002] In frost-free refrigerators, the air duct components are used to seal the air ducts and guide the flow of cold air. Among them, the air duct sealing plate, as a key component of the frost-free refrigerator's air duct system, directly affects the flow path of cold air and the uniformity of cooling. The material selection and structural design of the air duct sealing plate have a significant impact on the overall user experience of the refrigerator.

[0003] To achieve uniform cooling across all compartments of a frost-free refrigerator, the industry standard commonly incorporates duct sealing plates into the refrigerator's air duct assembly. These sealing plates tightly cover the surface of pre-designed duct grooves, physically sealing the cold air generated by the evaporator along a predetermined path within the duct grooves to different compartments such as the freezer and refrigerator compartments. This prevents cold air leakage, which can lead to reduced cooling efficiency or uneven temperature distribution. Regarding the material selection for the duct sealing plates, frost-free refrigerators primarily use KT board. The main structure of the KT board is made of expanded polystyrene substrate. To improve surface strength and adhesion, the outer surface of the duct sealing plate is typically coated with a high-impact polystyrene film, while the inner surface is coated with hot melt adhesive for a secure connection to the air duct assembly.

[0004] However, the air duct sealing plate is made of KT board, which will continuously release irritating small molecule gases during the storage and transportation stages after the refrigerator is manufactured. The small molecule gases, combined with the odors released by other plastic parts and glues inside the refrigerator, become the source of the odor when opening a new refrigerator. Utility Model Content

[0005] This application provides a carbon fiber air duct sealing plate and a refrigerator to solve the problem of odors when the refrigerator is opened.

[0006] In a first aspect, this application provides a carbon fiber-based air duct sealing plate, used as a sealing plate in a refrigerator, comprising:

[0007] A first breathable membrane, an activated carbon fiber sheet, and a second breathable membrane; the first breathable membrane is stacked sequentially with the activated carbon fiber sheet and the second breathable membrane; the pore diameter of the first breathable membrane and the pore diameter of the second breathable membrane are both 0.1μm-10μm; the activated carbon fiber sheet is a multi-layer composite structure, the activated carbon fiber sheet includes at least two carbonized fiber layers and airflow channels disposed between adjacent carbonized fiber layers.

[0008] Optionally, the micropore diameter of the carbonized fiber layer is gradient-distributed, and the micropore diameter of the carbonized fiber layer gradually decreases from the side closer to the first breathable membrane to the side closer to the second breathable membrane.

[0009] Optionally, the edge of the activated carbon fiber sheet is provided with a serrated adsorption flange, the height of which is the same as the thickness of the activated carbon fiber sheet.

[0010] Optionally, the temperature resistance range of the first breathable membrane and the second breathable membrane is both -40℃ to 180℃, and when the temperature resistance range is within the range, the change rate of the pore diameter of the first breathable membrane and the second breathable membrane is less than or equal to a preset threshold.

[0011] Optionally, the thickness of both the first breathable membrane and the second breathable membrane is 20μm-50μm, and the thickness deviation between the first breathable membrane and the second breathable membrane is less than or equal to a preset deviation threshold.

[0012] Optionally, the airflow channel has a honeycomb cross-section, and the cross-sectional diameter of the airflow channel is 0.5mm-2mm.

[0013] Optionally, the specific surface area of ​​the activated carbon fiber sheet is 800 m². 2 / g-1500m 2 / g; the micropore diameter of the activated carbon fiber sheet is 1nm-5nm.

[0014] Optionally, it may also include a sol layer coated on the side of the second breathable membrane away from the first breathable membrane.

[0015] Optionally, the sol layer is a hot melt adhesive; the melting temperature of the hot melt adhesive is 80℃-150℃, and the coating thickness of the hot melt adhesive on the side of the second breathable membrane away from the activated carbon fiber sheet is within a preset coating thickness range.

[0016] Secondly, this application provides a refrigerator, including the carbon fiber-based air duct sealing plate described in the first aspect.

[0017] As can be seen from the above technical solutions, this application provides a carbon fiber-based air duct sealing plate and a refrigerator. The carbon fiber-based air duct sealing plate includes: a first breathable membrane, an activated carbon fiber sheet, and a second breathable membrane; the first breathable membrane is stacked sequentially with the activated carbon fiber sheet and the second breathable membrane; the pore diameter of the first breathable membrane and the pore diameter of the second breathable membrane are both 0.1μm-10μm; the activated carbon fiber sheet has a multi-layer composite structure, including at least two carbonized fiber layers and airflow channels disposed between adjacent carbonized fiber layers. Odor molecules are guided into the refrigerator through the first breathable membrane, and the multi-layer structure of the activated carbon fiber sheet and the airflow channels prolong odor retention and increase contact. Through efficient adsorption by the multi-layered carbonized fibers, the problem of odors when opening the refrigerator is solved. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a carbon fiber-based air duct sealing plate structure provided in an embodiment of this application;

[0020] Figure 2 A schematic diagram of the carbon fiber-based air duct sealing plate structure provided in an embodiment of this application in yet another embodiment;

[0021] Figure 3 This is a schematic diagram of the activated carbon fiber sheet structure provided in an embodiment of this application.

[0022] Figure label:

[0023] Wherein, 1-first breathable membrane; 2-activated carbon fiber sheet; 3-second breathable membrane; 4-sol layer; 21-carbonized fiber layer; 22-airflow channel; 23-adsorption flange. Detailed Implementation

[0024] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0025] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0026] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0027] Refrigerators use a lot of plastic parts, glue, and sponge. Newly manufactured refrigerators may accumulate a high concentration of pungent odors inside during production and transportation, causing customers to smell an odor when they receive the new refrigerator and subsequently complain.

[0028] The air duct assembly of the frost-free refrigerator uses a sealing plate. The function of the sealing plate is to cover the designed air duct grooves, so that the cold air generated by the refrigerator can flow to each compartment inside the refrigerator according to the predetermined grooves, achieving a uniform cooling effect.

[0029] In some embodiments, air-cooled refrigerators mainly use KT boards as air duct sealing plates. The main material of KT boards is expanded polystyrene, with a HIPS film covering the surface and hot melt adhesive on the back. All KT board materials emit a pungent odor, which, together with other plastic parts in the refrigerator, constitutes the main source of refrigerator odor when the refrigerator is opened.

[0030] Therefore, to solve the problem of odors when the refrigerator door is opened, such as Figure 1 As shown in the illustration, this application provides a carbon fiber-based air duct sealing plate, which is applied to a refrigerator. The carbon fiber-based air duct sealing plate includes:

[0031] A first breathable membrane 1, an activated carbon fiber sheet 2, and a second breathable membrane 3; the first breathable membrane 1 is stacked sequentially with the activated carbon fiber sheet 2 and the second breathable membrane 3; the pore diameter of the first breathable membrane 1 and the pore diameter of the second breathable membrane 3 are both 0.1μm-10μm; the activated carbon fiber sheet 2 is a multi-layer composite structure, and the activated carbon fiber sheet 2 includes at least two carbonized fiber layers 21 and airflow channels 22 disposed between adjacent carbonized fiber layers 21.

[0032] Specifically, the carbon fiber-based air duct sealing plate includes a first breathable membrane 1, an activated carbon fiber sheet 2, and a second breathable membrane 3. The first breathable membrane 1 and the second breathable membrane 3 serve as the two side surfaces of the sealing plate, respectively. The first breathable membrane 1 is sequentially connected to the activated carbon fiber sheet 2 and the second breathable membrane 3, forming a three-layer structure of first breathable membrane 1-activated carbon fiber sheet 2-second breathable membrane 3. The pore diameters of both the first breathable membrane 1 and the second breathable membrane 3 are limited to 0.1μm-10μm, where 0.1μm-10μm is a submicron-level pore size. The pore diameters of the first breathable membrane 1 and the second breathable membrane 3 are larger than the size of common odor molecules in refrigerators, such as formaldehyde (0.3nm) and benzene compounds (0.5-0.8nm), ensuring that odor molecules released from plastic parts and adhesives in the air duct and refrigerator body can easily penetrate the breathable membrane and enter the interior of the activated carbon fiber sheet 2. The pore diameter of the first breathable membrane 1 and the second breathable membrane 3 is smaller than the minimum aggregation diameter of condensed water vapor in the refrigerator. This effectively blocks water vapor from penetrating the activated carbon fiber sheet 2, preventing water vapor from damaging the microporous structure on the surface of the carbon fiber and causing the adsorption capacity to decrease, thus providing a stable structural basis for odor adsorption.

[0033] Meanwhile, the activated carbon fiber sheet 2 adopts a multi-layer composite structure, including at least two carbonized fiber layers 21 and airflow channels 22 disposed between adjacent carbonized fiber layers 21. The design of the honeycomb airflow channels 22 optimizes the adsorption path of odor molecules. When odor molecules penetrate the first breathable membrane 1, they diffuse orderly along the honeycomb channels instead of directly and quickly passing through the activated carbon fiber sheet 2. This prolongs the residence time of odor molecules in the carbonized fiber layers 21, increases the contact area between odor molecules and carbonized fibers, solves the problem of insufficient contact and local adsorption saturation of odor molecules in single-layer carbon fiber structures, and ensures that odor molecules can be fully captured.

[0034] In some embodiments, the micropore diameter of the carbonized fiber layer 21 is gradient-distributed, and the micropore diameter of the carbonized fiber layer 21 gradually decreases from the side near the first breathable membrane 1 to the side near the second breathable membrane 3.

[0035] Specifically, the micropores near the first breathable membrane 1 have a diameter of 3nm-5nm, while those near the second breathable membrane 3 have a diameter of 1nm-3nm. This gradient design enables graded adsorption. Larger odor molecules within the air duct, such as some ester molecules, are first captured by the larger micropores near the first breathable membrane 1, while smaller odor molecules, such as formaldehyde and acetaldehyde, can penetrate into the smaller micropores near the second breathable membrane 3 and be adsorbed. This avoids the problem of incomplete adsorption of specific molecules by a single-pore micropore, further improving the overall odor removal rate.

[0036] In some embodiments, such as Figure 3 As shown, the edge of the activated carbon fiber sheet 2 is provided with a serrated adsorption flange 23, and the height of the adsorption flange 23 is consistent with the thickness of the activated carbon fiber sheet 2.

[0037] Considering that odor retention blind spots can easily form at the edges of the air duct grooves, the activated carbon fiber sheet 2 has serrated adsorption flanges 23 along its edges. The height of the adsorption flanges 23 is consistent with the thickness of the activated carbon fiber sheet 2. For example, if the thickness of the activated carbon fiber sheet 2 is 1-3mm, the height of the adsorption flanges 23 is also 1-3mm. The tooth spacing of the adsorption flanges 23 is controlled at 1mm-3mm, and the tooth tips are rounded to avoid damage during cutting. The adsorption flanges 23 can directly and tightly contact the inner wall of the air duct groove. Compared with traditional straight edges, the adsorption flanges 23 can effectively capture odor molecules in the edge area of ​​the air duct, eliminate adsorption blind spots, and ensure that the entire air duct assembly is free of odor residue.

[0038] In some embodiments, the temperature resistance range of the first breathable membrane 1 and the second breathable membrane 3 is both -40℃ to 180℃, and when the first breathable membrane 1 and the second breathable membrane 3 are within the temperature resistance range, the rate of change of the pore diameter of the first breathable membrane 1 and the second breathable membrane 3 is less than or equal to a preset threshold.

[0039] To adapt to the extreme operating environment of the refrigerator, for example, the temperature of the freezer compartment air duct is as low as -30℃, and the hot melt adhesive bonding temperature during production is as high as 150℃. The temperature resistance range of the first breathable membrane 1 and the second breathable membrane 3 is set to -40℃ to 180℃; and within the temperature resistance range, the change rate of the pore diameter of the first breathable membrane 1 and the second breathable membrane 3 is less than or equal to a preset threshold. By limiting the change rate of the pore diameter of the first breathable membrane 1 and the second breathable membrane 3, it can be ensured that the microporous structure of the first breathable membrane 1 and the second breathable membrane 3 does not undergo significant shrinkage or expansion during the entire life cycle of the refrigerator. When in the low-temperature environment of the freezer compartment, the breathable membrane will not become brittle and cause micropore blockage; when in the high-temperature environment of hot melt adhesive bonding, the micropores will not melt and become larger in size, losing their water-blocking ability, thus maintaining stable air permeability and water-blocking performance, ensuring that the adsorption effect of the activated carbon fiber sheet 2 does not decrease.

[0040] In some embodiments, the thickness of the first breathable membrane 1 and the second breathable membrane 3 is 20μm-50μm, and the thickness deviation between the first breathable membrane 1 and the second breathable membrane 3 is less than or equal to a preset deviation threshold.

[0041] To balance the physical strength of the breathable membrane with the overall thickness of the sealing plate, and to prevent the carbon fiber-based duct sealing plate from being too thick and affecting the duct fit, the thickness of both the first breathable membrane 1 and the second breathable membrane 3 is limited to 20μm-50μm; and the thickness deviation between the first breathable membrane 1 and the second breathable membrane 3 is less than or equal to a preset deviation threshold. If the thickness of the first breathable membrane 1 and the second breathable membrane 3 is less than 20μm, the first breathable membrane 1 and the second breathable membrane 3 are easily damaged during cutting and installation, leading to moisture intrusion; if the thickness is greater than 50μm, it will increase the overall thickness of the carbon fiber-based duct sealing plate, which may not match the reserved gap in the duct groove, leading to cold air leakage; while controlling the thickness deviation within the preset deviation range can ensure that the air permeability performance on both sides of the sealing plate is uniform and consistent, avoiding differences in the penetration efficiency of odor molecules due to excessive thickness of the breathable membrane on one side, thus affecting the adsorption effect.

[0042] In some embodiments, the cross-section of the airflow channel 22 is honeycomb-shaped, and the cross-sectional diameter of the airflow channel 22 is 0.5mm-2mm.

[0043] The honeycomb-shaped cross-section of the airflow channel 22 increases the air permeable area and improves air permeability, while also enhancing the overall strength of the carbon fiber-based air duct sealing plate. The diameter of the airflow channel 22 is limited to the range of 0.5mm-2mm. If the diameter is less than 0.5mm, airflow will be significantly obstructed, affecting air permeability; if the diameter is greater than 2mm, it may not effectively intercept some odor molecules, reducing the sealing plate's ability to adsorb and filter odors.

[0044] In some embodiments, the activated carbon fiber sheet 2 is made by mixing and carbonizing at least two of the following raw materials: viscose fiber, polyacrylonitrile-based fiber, pitch-based fiber, plant fiber, and special fiber.

[0045] To ensure that the activated carbon fiber sheet 2 possesses both high adsorption performance and sufficient structural strength, preventing breakage during installation, the activated carbon fiber sheet 2 is made by mixing and carbonizing at least two raw materials selected from viscose fiber, polyacrylonitrile-based fiber, pitch-based fiber, plant fiber, and special fiber. The preferred ratio is polyacrylonitrile-based fiber: viscose fiber: special fiber = (50-70): (20-40): (5-10). Polyacrylonitrile-based fiber, after carbonization, forms numerous nanoscale micropores, serving as the primary raw material for odor adsorption. Viscose fiber exhibits excellent film-forming properties and flexibility, ensuring that the mixed fiber blank is not prone to cracking during papermaking and carbonization, thus improving the tensile strength of the fiber sheet. Special fibers, such as low-temperature resistant modified polyester fiber, further enhance the weather resistance of the activated carbon fiber sheet 2, making it suitable for low-temperature environments like refrigerators and preventing the fiber sheet from becoming brittle after long-term use.

[0046] In some embodiments, the specific surface area of ​​the activated carbon fiber sheet 2 is 800 m². 2 / g-1500m 2 / g; the micropore diameter of activated carbon fiber sheet 2 is 1nm-5nm.

[0047] Specifically, to quantify the adsorption capacity of activated carbon fiber sheet 2 and ensure that it meets the odor adsorption requirements of the refrigerator, the specific surface area of ​​activated carbon fiber sheet 2 is 800 m². 2 / g-1500m 2 / g. The micropore diameter of activated carbon fiber sheet 2 is 1nm-5nm. Specific surface area directly determines adsorption capacity, 800m 2 A specific surface area of ​​over / g provides ample adsorption sites, capable of adsorbing 10%-15% of its own weight in odor molecules; while a micropore diameter of 1nm-5nm can precisely match the vast majority of odor molecules in the refrigerator, ensuring that odor molecules can smoothly enter the micropores and be fixed, avoiding the problem of molecules not being able to enter due to the micropore diameter being too small, or molecules easily escaping due to the micropore diameter being too large.

[0048] In some embodiments, such as Figure 2 As shown, the carbon fiber-based air duct sealing plate also includes a sol layer 4, which is coated on the side of the second breathable membrane 3 away from the first breathable membrane 1. The sol layer 4 is a hot melt adhesive; the melting temperature of the hot melt adhesive is 80℃-150℃, and the coating thickness of the hot melt adhesive on the side of the second breathable membrane 3 away from the activated carbon fiber sheet 2 is within a preset coating thickness range.

[0049] To ensure reliable fixation between the carbon fiber-based duct sealing plate and the duct groove, the carbon fiber-based duct sealing plate also includes a sol layer 4, which is coated on the side of the second breathable membrane 3 away from the first breathable membrane 1. The sol layer 4 is a hot melt adhesive, with a melting temperature limited to 80℃-150℃. The coating thickness of the hot melt adhesive on the side of the second breathable membrane 3 away from the activated carbon fiber sheet 2 is limited to a preset coating thickness range, specifically 10μm-30μm. Specifically, the melting temperature of 80℃-150℃ is suitable for the automated bonding process of refrigerator duct components, and the bonding strength after cooling can reach over 1.5MPa, ensuring that the carbon fiber-based duct sealing plate remains bonded for a long time without falling off. The coating thickness of 10μm-30μm prevents excessive hot melt adhesive from overflowing into the duct groove and affecting cold air circulation, while also ensuring sufficient bonding area, balancing sealing performance and bonding reliability.

[0050] In addition, to verify the technical effect of the carbon fiber-based air duct sealing plate of this application on solving the odor problem when opening a refrigerator, three sets of comparative experiments were conducted to test the sealing plate itself from three dimensions: no odor, adsorption of other odor sources, and compatibility with actual air duct components. The technical parameters of all experimental samples strictly followed the limitations of the embodiments of this application, and the experimental data and results can directly support the effectiveness of the technical solution of this utility model.

[0051] Example 1

[0052] Take one 10cm×10cm duct sealing plate and one carbon fiber-based duct sealing plate, and place them in 500ml odor bottles numbered ① and ② respectively. Seal the bottles and place them at 70℃ for 24 hours. The odor evaluation team will conduct the evaluation, and the evaluation level will be based on Table 1. The evaluation results are shown in Table 2.

[0053] Table 1. Material Odor Intensity Rating and Description

[0054] 1 Odorless 2 Slight odors are perceptible and acceptable. 3 It has an odor, but it's not irritating and tolerable. 4 It has a strong, unpleasant odor. 5 Strong, unbearable pungent odor

[0055] Table 2 Odor Evaluation Record of Air Duct Sealing Plate

[0056]

[0057] As shown in Table 2, due to the inherent properties of the material, the carbon fiber-based duct sealing panel remains odorless even after being placed in a high-temperature environment. In contrast, traditional duct sealing panels (KT panels) release a significant amount of odor molecules after being placed in a high-temperature environment, resulting in a noticeable and unpleasant odor. Therefore, it is determined that the carbon fiber-based duct sealing panel possesses the inherent odorless characteristic of the material, thus meeting the requirement of improving refrigerator odor upon opening.

[0058] Example 2

[0059] Take one traditional air duct sealing plate (KT board) and one carbon fiber-based air duct sealing plate, each measuring 10cm x 10cm. Place them into 500ml odor bottles numbered 1 and 2, respectively. Then, add equal amounts of EPS foam (5 foam blocks with a volume of 1cm³) and HIPS plastic particles (10g particles) to each odor bottle. Seal the bottles and place them at 70℃ for 24 hours. The odor evaluation team will conduct the evaluation, and the evaluation levels will be based on Table 1. The evaluation results are shown in Table 3.

[0060] Table 3 Odor Evaluation Record of Air Duct Sealing Plate (Part 2)

[0061]

[0062] As shown in Table 3, due to the rich microporous structure of the carbon fiber-based duct sealing plate material, it can effectively adsorb the small odor molecules generated by other odor sources at high temperatures when placed together. Thus, the material not only has the characteristic of being odorless, but also has the effect of deodorizing.

[0063] Example 3

[0064] Two air duct components from a 500L capacity air-cooled refrigerator were taken. The first component, with its original structure intact, was placed in odor chamber #1, which has a volume of 1 cubic meter. The air duct sealing plate on the back of the second component was removed and replaced with a carbon fiber-based air duct sealing plate of the same size and shape, and placed in odor chamber #2, which also has a volume of 1 cubic meter. Both odor chambers were sealed and placed in an environment of 70℃ for 24 hours. Afterwards, an odor evaluation team conducted an evaluation, following the procedures outlined in Table 1. The evaluation results are shown in Table 4.

[0065] Table 4 Odor Evaluation Record of Air Duct Components

[0066]

[0067] As shown in Table 4, replacing the original air duct sealing plate with a carbon fiber-based air duct sealing plate reduces the odor level of the entire air duct assembly by one level. This indicates that, under the combined conditions of various factors, the carbon fiber-based air duct sealing plate can still reduce the overall odor of the air duct assembly and help improve the odor when the refrigerator is opened.

[0068] Secondly, embodiments of this application provide a refrigerator, including the carbon fiber-based air duct sealing plate provided in the above embodiments.

[0069] The refrigerator utilizes a carbon fiber-based air duct sealing plate, effectively reducing the odor level upon opening. In practical use, the carbon fiber-based air duct sealing plate not only maintains the functionality of the original air duct sealing plate but also demonstrates a significant advantage in improving the odor inside the refrigerator. Experimental verification shows that, under the same experimental conditions, refrigerators using carbon fiber-based air duct sealing plates exhibit a significantly lower odor level compared to refrigerators using the original air duct sealing plates, thus providing users with a fresher and more comfortable user experience.

[0070] As can be seen from the above technical solutions, this application provides a carbon fiber-based air duct sealing plate and a refrigerator. The carbon fiber-based air duct sealing plate includes: a first breathable membrane 1, an activated carbon fiber sheet 2, and a second breathable membrane 3. The first breathable membrane 1 is stacked sequentially with the activated carbon fiber sheet 2 and the second breathable membrane 3. The pore diameter of the first breathable membrane 1 and the pore diameter of the second breathable membrane 3 are both 0.1μm-10μm. The activated carbon fiber sheet 2 has a multi-layer composite structure, including at least two carbonized fiber layers 21 and airflow channels 22 disposed between adjacent carbonized fiber layers 21. Odor molecules are guided into the refrigerator through the first breathable membrane 1. Combined with the multi-layer structure of the activated carbon fiber sheet 2 and the airflow channels 22, odor retention is prolonged and contact is increased. Through efficient adsorption by the multi-layer carbonized fibers, the problem of odors when opening the refrigerator is solved.

[0071] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A carbon fiber base air duct sealing plate applied to a sealing plate of a refrigerator, characterized in that, include: A first breathable membrane (1), an activated carbon fiber sheet (2), and a second breathable membrane (3); the first breathable membrane (1) is stacked sequentially with the activated carbon fiber sheet (2) and the second breathable membrane (3); the pore diameter of the first breathable membrane (1) and the pore diameter of the second breathable membrane (3) are both 0.1μm-10μm; the activated carbon fiber sheet (2) is a multi-layer composite structure, the activated carbon fiber sheet (2) includes at least two carbonized fiber layers (21) and airflow channels (22) disposed between adjacent carbonized fiber layers (21).

2. The carbon fiber based air duct sealing panel according to claim 1, wherein, The micropore diameter of the carbonized fiber layer (21) is distributed in a gradient. The micropore diameter of the carbonized fiber layer (21) gradually decreases from the side closer to the first breathable membrane (1) to the side closer to the second breathable membrane (3).

3. The carbon fiber based air duct sealing panel of claim 1, wherein, The activated carbon fiber sheet (2) has a serrated adsorption flange (23) on its edge, and the height of the adsorption flange (23) is the same as the thickness of the activated carbon fiber sheet (2).

4. The carbon fiber based air duct sealing panel of claim 1, wherein, The temperature resistance range of the first breathable membrane (1) and the second breathable membrane (3) is -40℃ to 180℃, and when the first breathable membrane (1) and the second breathable membrane (3) are within the temperature resistance range, the change rate of the pore diameter of the first breathable membrane (1) and the second breathable membrane (3) is less than or equal to a preset threshold.

5. The carbon fiber based air duct sealing panel of claim 1, wherein, The thickness of the first breathable membrane (1) and the second breathable membrane (3) is 20μm-50μm, and the thickness deviation between the first breathable membrane (1) and the second breathable membrane (3) is less than or equal to a preset deviation threshold.

6. The carbon fiber based air duct sealing panel of claim 1, wherein, The airflow channel (22) has a honeycomb cross-section and a cross-sectional diameter of 0.5mm-2mm.

7. The carbon fiber based air duct sealing panel of claim 1, wherein, The specific surface area of the activated carbon fiber sheet (2) is 800 m 2 / g-1500 m 2 / g; and the micropore diameter of the activated carbon fiber sheet (2) is 1 nm-5 nm.

8. The carbon fiber based air duct sealing panel of claim 1, wherein, It also includes a sol layer (4), which is coated on the side of the second breathable membrane (3) away from the first breathable membrane (1).

9. The carbon fiber-based duct sealing plate according to claim 8, characterized in that, The sol layer (4) is a hot melt adhesive; the melting temperature of the hot melt adhesive is 80℃-150℃, and the coating thickness of the hot melt adhesive on the side of the second breathable membrane (3) away from the activated carbon fiber sheet (2) is within the preset coating thickness range.

10. A refrigerator, characterized in that, Includes the carbon fiber-based duct sealing plate according to any one of claims 1-9.

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