Dustproof and antifouling structure of refrigerator sealing strip
By combining a triple-sealed core structure with antibacterial and antistatic layers, the problem of refrigerator seals easily absorbing dust and stains is solved, maintaining airtightness, extending service life, and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU YUHANG BOLU PLASTIC PROD FACTORY
- Filing Date
- 2025-07-16
- Publication Date
- 2026-05-19
AI Technical Summary
Existing refrigerator sealing strips have a simple design, which easily attracts dust and stains, making them difficult to clean. Furthermore, their elasticity weakens over long-term use, reducing their sealing performance, leading to cold air leakage, increased energy consumption, and a shortened lifespan.
It adopts a triple-sealed core structure, combining an antibacterial layer and an antistatic layer, and forms a sealing strip through a composite co-extrusion process. The antibacterial layer contains uniformly dispersed silver ion antibacterial agent, the surface of the antistatic layer is designed with a micro-rough structure, and the support layer provides elastic support to prevent dust adsorption and bacterial growth.
It effectively prevents dust and stains from adhering, maintains airtightness, extends service life, reduces energy consumption, and improves cleaning convenience and sealing performance.
Smart Images
Figure CN224262045U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigerator sealing strip technology, and in particular to a dustproof and dirt-proof structure for refrigerator sealing strips. Background Technology
[0002] The refrigerator door seal is a crucial component installed on the edge of the refrigerator door. It primarily uses the magnetic force of an internal strip to tightly adhere to the refrigerator body, effectively sealing the gap between the door and the body. It effectively prevents cold air from escaping, reducing energy loss, while also blocking external heat, dust, and insects from entering, maintaining a stable low-temperature environment inside the refrigerator, and preventing food from absorbing odors or becoming contaminated. It is a vital component for ensuring the refrigerator's cooling performance, energy efficiency, and hygiene. If it ages, deforms, or leaks air, it will directly affect the refrigerator's preservation performance and overall efficiency.
[0003] Currently, refrigerator door seals on the market generally suffer from a lack of design variety, with surfaces typically being smooth or having simple textured surfaces. This design makes the seals highly susceptible to accumulating dust, spills, and other stains, especially in corners and crevices, making cleaning difficult and prone to bacterial growth. Furthermore, with frequent opening and closing of the refrigerator door, the seals gradually lose elasticity due to bending and aging. Combined with dirt accumulation, this reduces the seal's adhesion to the door frame, significantly compromising its sealing performance. This not only causes cold air leakage but also increases energy consumption and shortens the refrigerator's lifespan. Therefore, we propose a dust- and stain-resistant structure for refrigerator door seals to address these issues. Utility Model Content
[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.
[0005] Therefore, the purpose of this utility model is to provide a dust-proof and stain-proof structure for refrigerator sealing strips, which can solve the problem of the generally simple design of refrigerator sealing strips on the market. Their surfaces are mostly smooth or have simple uneven structures. This structure makes the sealing strips very easy to absorb dust, soup, and other stains, especially in the corners and crevices, which are difficult to clean and prone to bacterial growth. Moreover, during the long-term and frequent opening and closing of the refrigerator door, the sealing strip gradually loses its elasticity due to continuous bending and aging. Coupled with the corrosion of stains, the fit between the sealing strip and the refrigerator door frame decreases, resulting in a significant reduction in sealing performance. This not only causes cold air to leak out but also increases the refrigerator's energy consumption and shortens its service life.
[0006] To solve the above-mentioned technical problems, this utility model provides a dustproof and anti-fouling structure for refrigerator sealing strips, which adopts the following technical solution: it includes a sealing strip body, the sealing strip body includes a first sealing core, a second sealing core and a third sealing core arranged sequentially from front to back, and the first sealing core, the second sealing core and the third sealing core are formed into a complete sealing assembly through a composite co-extrusion process, and the first sealing core, the second sealing core and the third sealing core are all provided with dustproof and anti-fouling components inside.
[0007] Preferably, the dustproof and anti-fouling component includes an antibacterial layer and an antistatic layer, with the antistatic layer located outside the antibacterial layer.
[0008] Preferably, the antibacterial layer is made by mixing an antibacterial agent with a rubber material, wherein the antibacterial agent particles are uniformly dispersed inside the rubber material by mechanical stirring.
[0009] Preferably, the antistatic layer is made of polyacrylic acid rare earth antistatic agent material.
[0010] Preferably, the inner main body of the first sealing core, the second sealing core and the third sealing core includes a support layer, which is made of thermoplastic elastomer material.
[0011] Preferably, the support layer is located inside the antibacterial layer.
[0012] In summary, this utility model has at least one of the following beneficial effects: 1. A triple protective barrier is formed by the first, second, and third sealing cores arranged in front, middle, and rear in sequence: the first sealing core with a lip-shaped structure actively removes dust from the door frame by scraping the lip edge; the second sealing core with a bubble tube shape fills the gaps by elastic deformation, reducing the dust intrusion channel; and the third sealing core with a fitting shape stores the pollutants that have entered through the groove design, preventing diffusion.
[0013] 2. The silver ion antibacterial agent in the antibacterial layer is evenly dispersed in the rubber. Upon contact with bacteria, the silver ions destroy the bacterial structure and inhibit bacterial growth. It bonds tightly to the rubber, providing long-term antibacterial protection, which is more effective than ordinary materials and also prevents the sealing strip from odoring and corroding. The antistatic layer uses a special honeycomb structure to reduce the contact area with dust, and then uses a polyacrylic acid rare earth antistatic agent to eliminate static electricity, making it difficult for dust to adhere to the surface of the sealing strip. Compared to ordinary sealing strips, it accumulates less dust, is easier to clean, and ages more slowly. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a three-dimensional front view of the overall structure of this utility model;
[0017] Figure 3 This is a side view of the overall structure of this utility model;
[0018] Figure 4 This is a schematic diagram of the dustproof and anti-fouling component structure of this utility model.
[0019] The components represented by each number in the attached diagram are listed below: 1. Sealing strip body; 2. First sealing core; 3. Second sealing core; 4. Third sealing core; 5. Antibacterial layer; 6. Antistatic layer; 7. Support layer. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] The following is in conjunction with the appendix Figure 1 —4. This utility model will be described in further detail.
[0022] In this embodiment, to address the common problem of monotonous design in current refrigerator sealing strips on the market, whose surfaces are mostly smooth or have simple uneven structures, this design makes the sealing strips prone to absorbing dust, soup, and other stains, especially in the corners and crevices, making cleaning difficult and prone to bacterial growth. Furthermore, with frequent opening and closing of the refrigerator door over a long period, the sealing strip gradually loses its elasticity due to constant bending and aging. Combined with the erosion of dirt, the fit between the sealing strip and the refrigerator door frame decreases, resulting in a significant reduction in sealing performance. This not only causes cold air leakage but also increases the refrigerator's energy consumption and shortens its lifespan. Therefore, this utility model discloses a dust-proof and stain-resistant structure for refrigerator sealing strips.
[0023] The sealing strip body 1 includes a first sealing core 2, a second sealing core 3 and a third sealing core 4 arranged sequentially from front to back. The first sealing core 2, the second sealing core 3 and the third sealing core 4 are formed into a complete sealing assembly through a composite co-extrusion process. The first sealing core 2, the second sealing core 3 and the third sealing core 4 are all equipped with dustproof and anti-fouling components inside.
[0024] Specifically, the three sealing cores are connected through a composite co-extrusion process, with a transition layer at the connection point. This transition layer is composed of two materials, ensuring a smooth transition between the different core materials and guaranteeing the overall strength and sealing performance of the sealing strip. Furthermore, an anti-warping structure is added to both sides of the sealing strip body 1. This anti-warping structure consists of a 0.3mm thick elastic rubber sheet, preventing the sealing strip edges from warping and further enhancing its dust and dirt resistance.
[0025] The dustproof and anti-fouling component includes an antibacterial layer 5 and an antistatic layer 6, with the antistatic layer 6 located outside the antibacterial layer 5;
[0026] Specifically, the antibacterial layer 5 and the antistatic layer 6 adopt a layered composite structure and are integrally formed through a co-extrusion process. The two layers are tightly bonded together without obvious gaps between them. The thickness of the antistatic layer 6 is controlled between 0.1-0.3mm, and its surface is specially treated to form a micro-rough structure. This structure can effectively reduce the contact area with dust and other stains, reducing the probability of stain adhesion. The thickness of the antibacterial layer 5 is 0.3-0.5mm, ensuring sufficient antibacterial components and achieving long-lasting antibacterial function.
[0027] The antibacterial layer 5 is made by mixing antibacterial agent with rubber material, wherein the antibacterial agent particles are uniformly dispersed inside the rubber material by mechanical stirring.
[0028] Specifically, during the mixing process, EPDM raw rubber is first fed into an internal mixer for plasticizing to achieve suitable plasticity. Then, surface-modified silver ion antibacterial agent granules are added. The modification treatment uses a silane coupling agent, which enhances the compatibility between the antibacterial agent and the rubber.
[0029] Antistatic layer 6 is made of polyacrylic acid rare earth antistatic agent material;
[0030] Specifically, a high-concentration antistatic masterbatch is prepared by mixing a rare-earth polyacrylic acid antistatic agent with a carrier resin (such as low-density polyethylene) at a ratio of 1:10. During the co-extrusion molding of the sealing strip, the antistatic masterbatch is added to the extruder barrel along with other raw materials in a certain proportion (usually the antistatic masterbatch accounts for 3%-5% of the total raw materials). The rotation of the extruder screw ensures that the antistatic masterbatch is evenly dispersed in the raw materials, and the mixture is extruded at a high temperature (approximately 180°C) to form the antistatic layer 6. The surface resistivity of the molded antistatic layer 6 is controlled at 10 Ω·cm. 6 -109 Ω effectively eliminates surface static electricity and prevents charged particles such as dust from adhering to the surface of the sealing strip.
[0031] The main body inside the first sealing core 2, the second sealing core 3 and the third sealing core 4 includes a support layer 7, which is made of thermoplastic elastomer material;
[0032] Specifically, the support layer 7 is made of thermoplastic styrene (TPS) with a Shore hardness of 50-60A, exhibiting good elasticity and flexibility while possessing high mechanical strength. The support layer 7 forms a continuous mesh structure within each sealing core, injection molded and tightly bonded to the antibacterial layer 5. Its thickness varies depending on the functional requirements of each sealing core. The support layer 7 of the first sealing core 2 is 0.8-1.2mm thick, primarily providing initial support and positioning; the support layer 7 of the second sealing core 3 is 1.2-1.5mm thick, providing primary elastic support for the sealing strip; and the support layer 7 of the third sealing core 4 is 0.6-0.8mm thick, focusing on adhesion and sealing with the refrigerator door frame.
[0033] The support layer 7 is located inside the antibacterial layer 5;
[0034] Specifically, during the co-extrusion molding process of the sealing strip, the thermoplastic elastomer material of the support layer 7 is first extruded through an independent extrusion channel to form an internal skeleton of a specific shape. Subsequently, the rubber compound material of the antibacterial layer 5 wraps around the support layer 7, and the two are tightly bonded under high temperature and pressure. This structural design allows the support layer 7 to provide stable support for the antibacterial layer 5, preventing the antibacterial layer 5 from deforming or breaking during frequent bending. At the same time, the antibacterial layer 5 protects the support layer 7 from stains, extending the overall service life of the sealing strip.
[0035] The specific working principle is as follows: When the refrigerator door is closed, the first sealing core 2, the second sealing core 3, and the third sealing core 4 sequentially contact the refrigerator door frame and undergo compression deformation. The support layer 7, made of thermoplastic elastomer, provides stable support for the entire sealing strip due to its excellent elasticity and resilience, ensuring a tight fit between the sealing strip and the door frame, forming a multi-layered sealing structure that effectively prevents cold air leakage and the entry of external hot air and dust into the refrigerator. The antistatic layer 6 utilizes the properties of polyacrylic acid rare earth antistatic agents to give the sealing strip surface a weak static charge, which neutralizes the charge carried by dust particles, preventing dust from adhering to the sealing strip surface due to electrostatic adsorption. Simultaneously, the microscopic rough structure of the antistatic layer 6 further reduces the contact area with dust, lowering the adhesion of dust and making it easier to wipe away. The inorganic silver ion antibacterial agent in the antibacterial layer 5 continuously releases silver ions. When bacteria and other microorganisms come into contact with the surface of the antibacterial layer 5, the silver ions destroy the bacterial cell membrane and intracellular enzyme system, inhibiting bacterial growth and reproduction, thereby effectively preventing bacterial growth due to dirt residue. Even if a small amount of soup or other stains adhere to the surface of the sealing strip, the antibacterial layer 5 can still inhibit bacterial growth to a certain extent, keeping the sealing strip clean and hygienic. During frequent opening and closing of the refrigerator door over a long period, the support layer 7 can absorb most of the bending stress, slowing down the aging rate of the antibacterial layer 5 and the antistatic layer 6. At the same time, because the antibacterial layer 5 and the antistatic layer 6 are tightly bonded and possess good wear resistance and stain resistance, they can effectively resist the erosion of stains, maintain the elasticity and sealing performance of the sealing strip, reduce cold air leakage, lower refrigerator energy consumption, and extend the refrigerator's lifespan.
[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A dustproof and dirt-proof structure for a refrigerator sealing strip, comprising a sealing strip body (1), characterized in that: The sealing strip body (1) includes a first sealing core (2), a second sealing core (3) and a third sealing core (4) arranged sequentially from front to back. The first sealing core (2), the second sealing core (3) and the third sealing core (4) are formed into a complete sealing assembly through a composite co-extrusion process. The first sealing core (2), the second sealing core (3) and the third sealing core (4) are all provided with dustproof and anti-fouling components inside.
2. The refrigerator sealing strip dustproof and dirt-proof structure according to claim 1, characterized in that: The dustproof and anti-fouling component includes an antibacterial layer (5) and an antistatic layer (6), with the antistatic layer (6) located outside the antibacterial layer (5).
3. The refrigerator sealing strip dustproof and dirt-proof structure according to claim 2, characterized in that: The antibacterial layer (5) is made by mixing antibacterial agent with rubber material, wherein the antibacterial agent particles are uniformly dispersed inside the rubber material by mechanical stirring.
4. The refrigerator sealing strip dustproof and dirt-proof structure according to claim 3, characterized in that: The antistatic layer (6) is made of polyacrylic acid rare earth antistatic agent material.
5. The refrigerator sealing strip dustproof and dirt-proof structure according to claim 1, characterized in that: The main body of the first sealing core (2), the second sealing core (3) and the third sealing core (4) includes a support layer (7), which is made of thermoplastic elastomer material.
6. The refrigerator sealing strip dustproof and dirt-proof structure according to claim 5, characterized in that: The support layer (7) is located inside the antibacterial layer (5).