A screwless fixing structure of a refrigerator top cover

Abstract

The utility model relates to the technical field of refrigerator, and disclose a kind of screwless fixing structure of refrigerator top cover, including refrigerator top end, the refrigerator top end top is provided with cover, the refrigerator top end top is fixedly provided with the protruding extension plate, the outer diameter of the extension plate is less than the inner diameter of the cover side plate, respectively set up clamping groove on the extension plate around, four side plates of the cover correspond clamping groove position set up limit slot, fastener is slidably arranged in the limit slot, and the fastener is adapted to the limit slot and clamping groove, fastening mechanism is fixedly arranged on the cover, the fastening mechanism includes magnetic block, the magnetic block is fixedly arranged on the cover top plate inner wall, solve the existing equipment's assembly and disassembly inconvenient, easy to rust, poor fixing stability, poor sealing problem.

Description

Technical Field

[0001] This utility model relates to the field of refrigerator technology, specifically to a screwless fixing structure for a refrigerator top cover. Background Technology

[0002] In the manufacturing and use of refrigerators, the top cover, as an important component, not only protects the internal electrical components and enhances the appearance, but also needs to have good stability to withstand vibration and impact during transportation and daily use. Currently, most refrigerators on the market still use the traditional screw connection structure to fix the top cover, that is, to directly lock the top cover to the top frame or bracket of the refrigerator with multiple screws. This fixing method has gradually revealed many insurmountable defects in long-term use.

[0003] First, the assembly process of screw connections is cumbersome, requiring operators to tighten each screw one by one with the help of screwdrivers and other professional tools. This not only consumes a lot of time and reduces production assembly efficiency, but also poses a risk of screw installation position deviation, affecting the assembly accuracy of the top cover. At the same time, during the later maintenance or repair of the refrigerator, all screws must be removed before the top cover can be taken off. The disassembly process is also time-consuming and laborious, and repeated disassembly can easily lead to wear and stripping of screw holes, which will affect the subsequent re-fixing effect. In some cases, the top cover may not be able to be effectively fixed due to damage to the screw holes, thus reducing the service life of the refrigerator.

[0004] Secondly, screws are prone to corrosion during long-term use due to factors such as environmental humidity and temperature changes. Screws located on the top of the refrigerator are particularly susceptible to corrosion, which may be accelerated by the condensation of water vapor or the accumulation of dust in the air. This not only affects the appearance of the refrigerator, but also causes problems such as jamming and breakage of the rusted screws, further increasing the difficulty of disassembly. In severe cases, it may even be necessary to damage the top cover or the top structure of the refrigerator to complete the disassembly, causing unnecessary losses.

[0005] Therefore, the existing screw fixing structure of the refrigerator top cover has problems such as inconvenient assembly and disassembly, easy corrosion, poor fixing stability, and poor sealing, which makes it difficult to meet the needs of improving refrigerator production efficiency, convenient maintenance, and long-term reliability. Utility Model Content

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a screwless fixing structure for a refrigerator top cover, which has the advantages of easy assembly and disassembly, good stability, and good sealing performance. It solves the problems of inconvenient assembly and disassembly, easy corrosion, poor fixing stability, and poor sealing performance of existing equipment.

[0007] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a screwless fixing structure for a refrigerator top cover, comprising a refrigerator top, a cover body being provided on the top of the refrigerator top, a protruding extension plate being fixedly provided on the top of the refrigerator top, the outer diameter of the extension plate being smaller than the inner diameter of the side plate of the cover body, slots being respectively provided on the extension plate around the perimeter, and limiting grooves being provided on the four side plates of the cover body corresponding to the slot positions, fasteners being slidably provided inside the limiting grooves, and the fasteners being adapted to the limiting grooves and slots, and a fastening mechanism being fixedly provided on the cover body, the fastening mechanism including a magnetic block being fixedly provided on the inner wall of the top plate of the cover body.

[0008] Preferably, the fastening mechanism further includes: An airbag is fitted to the inner wall of the top plate of the cover. An air nozzle is fixedly mounted on the airbag, and a vent hole is provided on the top of the cover, through which the air nozzle passes.

[0009] Preferably, the magnetic block is disposed on the periphery of the airbag, and the fastener and the top of the refrigerator are both made of metal material containing ferromagnetic elements.

[0010] Preferably, the fastener includes a slider and a limiting block, the size of the slider is adapted to the size of the slot, the size of the limiting block is adapted to the size of the limiting groove, and the length and width of the limiting groove are greater than the length and width of the slot, respectively. The extension plate has an embedding groove on its outer wall, which is located around the slot. A ring-shaped sealing ring is fixed on the side of the limiting block near the embedding groove, and the ring-shaped sealing ring works in conjunction with the embedding groove.

[0011] Preferably, an annular sealing groove is provided on the bottom inner side of the side plates around the cover, and an elastic sealing strip is provided on the top edge of the top of the refrigerator that is interference-fitted with the sealing groove. The sealing strip is embedded in the sealing groove to form a circumferential seal.

[0012] Preferably, a thermally conductive silicone pad is attached to the lower surface of the airbag. The thickness of the thermally conductive silicone pad is 0.5-1.5 mm, and the area of ​​the thermally conductive silicone pad is the same as the area of ​​the top contact area of ​​the refrigerator.

[0013] Preferably, the top of the air nozzle is provided with a sealing cap, the sealing cap is threadedly connected to the air nozzle, and the inner wall of the sealing cap is provided with an elastic sealing gasket, the elastic sealing gasket being interference-fitted with the air outlet of the air nozzle.

[0014] (III) Beneficial Effects Compared with the prior art, this utility model provides a screwless fixing structure for a refrigerator top cover, which has the following advantages: 1. The screwless fixing structure of this refrigerator top cover involves setting a protruding extension plate at the top of the refrigerator. The cover fits onto the outside of the extension plate, and the inner wall of the side panel fits against the outer wall of the extension plate. After aligning the limiting groove and the slot, the appropriate fastener is inserted. At the same time, the magnetic block on the inner wall of the top plate of the cover forms an auxiliary fixation, realizing a screwless mechanical connection between the cover and the top of the refrigerator. This design completely abandons the traditional screw fixing method. On the one hand, it avoids structural damage to the top of the refrigerator or the cover caused by screw installation. On the other hand, it solves the problems of difficult disassembly and loosening caused by screw corrosion and stripping during long-term use. On the other hand, the close fit between the extension plate and the side plate of the cover, combined with the precise positioning of the fasteners in the limiting groove and slot, ensures the positioning accuracy of the cover after installation. The magnetic attraction further supplements the fixation stability, preventing the cover from shifting laterally and resisting vertical vibration. The overall structure is simple and reliable, requiring no special tools for assembly. Simply align and insert the fasteners to complete the fixation, greatly improving assembly efficiency. At the same time, the disassembly process is convenient, providing great convenience for the later maintenance and repair of the refrigerator, achieving the dual effect of balancing installation stability and operational convenience.

[0015] 2. The screwless fixing structure of the refrigerator top cover utilizes an airbag fitted to the inner wall of the top plate of the cover, along with an air nozzle penetrating the vent hole at the top of the cover. This achieves interference prevention during installation and negative pressure reinforcement after installation. Simultaneously, the elasticity of the airbag and the one-way pressure relief valve built into the air nozzle enable adaptive pressure adjustment. Before installation, the airbag is inflated to a preset expansion state via the air nozzle, providing a suitable gap for the cover assembly and effectively preventing installation interference between the cover and the extension plate or the top of the refrigerator, ensuring a smooth assembly process. After installation and fixing, some of the gas inside the airbag is released to seal the airbag. A negative pressure is created, and the external atmospheric pressure exerts an inward clamping force on the fasteners, making the fasteners fit more tightly with the limiting grooves and slots, significantly improving the fixing strength. In addition, in response to the high-temperature environment during refrigerator operation, the gas in the enclosed space expands due to heat, causing the air pressure to rise. At this time, the one-way pressure relief valve automatically opens, and the airbag releases gas to balance the air pressure, preventing excessive air pressure from causing structural deformation. The elastic sealing characteristics of the airbag also buffer vibration and reduce friction noise between structures, achieving a balance between ease of installation, fixing reliability, and environmental adaptability, thus extending the service life of the structure. 3. The screwless fixing structure of the refrigerator top cover achieves synergistic reinforcement through magnetic adsorption and mechanical snap-fit ​​by placing magnetic blocks around the airbag and using fasteners made of ferromagnetic metal materials to the top of the refrigerator. The vertical attraction generated between the magnetic blocks and the top of the refrigerator allows the cover to fit tightly against the refrigerator top, reducing the gap between them. At the same time, it forms a vertical attraction force on the ferromagnetic fasteners, causing the fastener's limiting block to fit tightly against the upper wall of the limiting groove, and the slider to form lateral compression with the inner wall of the slot, making the fastener connection more secure and preventing the fasteners from loosening due to vibration during long-term use. This linkage design of magnetic adsorption and mechanical snap-fit ​​not only further improves the connection stability between the cover and the top of the refrigerator, but also helps the limiting groove and the slot to quickly align during assembly through magnetic-assisted positioning, improving assembly accuracy and efficiency. At the same time, magnetic reinforcement requires no additional structure, does not increase assembly complexity, and is unaffected by temperature changes, maintaining a stable reinforcement effect over a long period of time, achieving multiple purposes of strengthening fixation, simplifying assembly, and improving structural reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of part of the structure of this utility model after an explosion.

[0018] Figure 3 This is a schematic diagram of an isometric cross-section of part of the structure of this utility model after explosion.

[0019] Figure 4 This is an exploded view of the structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the cover structure of this utility model.

[0021] Figure 6 This is an enlarged schematic diagram of section A of the structure of this utility model.

[0022] In the diagram: 100, cover; 101, sealing groove; 110, limiting groove; 120, fastener; 121, annular sealing ring; 200. Top of refrigerator; 201. Sealing strip; 210. Extension plate; 211. Embedded groove; 220. Slot; 300. Fastening mechanism; 310. Airbag; 320. Air nozzle; 330. Magnetic block. Detailed Implementation

[0023] 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.

[0024] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Example 1: This embodiment provides a screwless fixing structure for a refrigerator top cover, which has the following technical features.

[0028] Please see Figure 1-6A screwless fixing structure for a refrigerator top cover includes a refrigerator top 200, a cover body 100 on the top of the refrigerator top 200, and a protruding extension plate 210 fixedly mounted on the top of the refrigerator top 200. The outer diameter of the extension plate 210 is smaller than the inner diameter of the side plates of the cover body 100. The extension plate 210 is provided with slots 220 on all four sides. The four side plates of the cover body 100 are provided with limiting grooves 110 corresponding to the slots 220. Fasteners 120 are slidably mounted inside the limiting grooves 110 and the slots 220. A fastening mechanism 300 is fixedly mounted on the cover body 100. The fastening mechanism 300 includes a magnetic block 330, which is fixedly mounted on the inner wall of the top plate of the cover body 100.

[0029] It should be noted that by fixing an extension plate 210 to the top periphery of the refrigerator top 200, and fitting the cover 100 onto the outside of the extension plate 210, the inner walls of the side panels of the cover 100 are made to fit against the outer walls of the extension plate 210. After aligning the limiting groove 110 with the slot 220, the fastener 120 is inserted through the limiting groove 110 and the slot 220, so that the cover 100 can be fixed on the refrigerator top 200, and the magnetic block 330 at the top can strengthen the connection between the cover 100 and the refrigerator top 200.

[0030] In an optional embodiment, the fastening mechanism 300 further includes: Airbag 310 is fitted to the inner wall of the top plate of cover 100; An air nozzle 320 is fixedly mounted on the airbag 310, and a vent hole is provided on the top of the cover 100, through which the air nozzle 320 passes.

[0031] It should be noted that the inflation volume of the airbag 310 can be adjusted via the air nozzle 320. Before installation, the airbag 310 should be inflated to the preset expansion state via the air nozzle 320 to ensure that the airbag and the top of the refrigerator maintain a proper fit gap during the assembly of the cover 100, thus avoiding installation interference. After the side panel of the cover 100 is fitted onto the outside of the extension plate 210 and the fastener 120 is engaged in the limiting groove 110 and the slot 220, some of the gas inside the airbag 310 is released via the air nozzle 320. This creates a negative pressure in the enclosed space formed by the cover 100, the extension plate 210, and the top of the refrigerator 200. The external atmospheric pressure then exerts an inward pressing force on the fastener 120, further tightening the fastener 120. Within the limiting groove 110 and the slot 220, the fastener 120 can be further fixed inside the limiting groove 110 and the slot 220, further reinforcing the fixation between the cover 100 and the top of the refrigerator 200. At the same time, under the high temperature environment generated by the normal operation of the refrigerator, the gas in the closed space formed by the cover 100, the extension plate 210 and the top of the refrigerator 200 expands due to heat, the air pressure increases and squeezes the airbag 310. The airbag 310 is made of elastic sealing material, and the air nozzle 320 has a built-in one-way pressure relief valve. When the air pressure in the closed space exceeds the preset threshold, the pressure relief valve opens automatically, and some of the gas in the airbag 310 is discharged through the air nozzle 320, avoiding structural deformation caused by the continuous increase of air pressure in the closed space.

[0032] In an optional embodiment, the magnetic block 330 is disposed around the airbag 310, and the fastener 120 and the top of the refrigerator top 200 are both made of a metal material containing ferromagnetic elements.

[0033] It should be noted that while the magnetic block 330 and the top of the refrigerator 200 are attracted and fixed together, the magnetic block 330 can also be attracted vertically to the fastener 120 containing ferromagnetic elements, so that the limiting block of the fastener 120 is tightly attached to the upper wall of the limiting groove 110. At the same time, the slider and the inner wall of the slot 220 are laterally squeezed, which further improves the clamping effect.

[0034] In an optional embodiment, the fastener 120 includes a slider and a limiting block, the slider being adapted to the size of the slot 220, the limiting block being adapted to the size of the limiting groove 110, and the length and width of the limiting groove 110 being greater than the length and width of the slot 220, respectively. The extension plate 210 has an embedded groove 211 on its outer wall. The embedded groove 211 is located around the slot 220. An annular sealing ring 121 is fixed on the side of the limiting block near the embedded groove 211. The annular sealing ring 121 works in conjunction with the embedded groove 211.

[0035] It should be noted that when the gas inside the airbag 310 is released through the air nozzle 320, the closed space formed by the cover 100, the extension plate 210 and the top of the refrigerator 200 forms a negative pressure lower than the outside atmospheric pressure. This can drive the fasteners 120 around the perimeter to slide inward. At this time, the annular sealing ring 121 can be embedded into the embedding groove 211 to strengthen the seal and make the structure more airtight and secure.

[0036] In an optional embodiment, an annular sealing groove 101 is provided on the bottom inner side of the side plates around the cover 100, and an elastic sealing strip 201 that is interference-fitted with the sealing groove 101 is provided on the top edge of the top of the refrigerator top 200. The sealing strip 201 forms a circumferential seal after being embedded in the sealing groove 101.

[0037] In an optional embodiment, a thermally conductive silicone pad is attached to the lower surface of the airbag 310. The thickness of the thermally conductive silicone pad is 0.5-1.5 mm, and the area of ​​the thermally conductive silicone pad is the same as the area of ​​the top attachment area of ​​the refrigerator top 200.

[0038] It should be noted that the thermally conductive silicone pad can quickly conduct heat from the top of the refrigerator top 200 to the airbag 310, so that the gas temperature in the enclosed space changes synchronously with the working temperature of the refrigerator top 200, avoiding pressure fluctuations caused by local temperature differences. At the same time, the elasticity of the silicone pad can buffer the hard contact between the airbag 310 and the refrigerator top 200, reducing abnormal noises caused by vibration.

[0039] In an optional embodiment, a sealing cap is provided at the top of the air nozzle 320, the sealing cap is threadedly connected to the air nozzle 320, and an elastic sealing gasket is provided on the inner wall of the sealing cap, the elastic sealing gasket being interference-fitted with the air outlet of the air nozzle 320.

[0040] Working principle: During assembly, the air bladder 310 on the inner wall of the top plate of the cover 100 is first inflated to a preset expansion state through the air nozzle 320. Then, the cover 100 is fitted onto the outer side of the extension plate on the top of the refrigerator top 200, so that the inner wall of the side plate of the cover 100 fits against the outer wall of the extension plate. At the same time, the limiting groove 110 of the cover 100 and the slot 210 of the extension plate are aligned, and the appropriate ferromagnetic fasteners are inserted to complete the initial mechanical fixation. Next, the air inside the air bladder 310 is released through the air nozzle 320, so that the closed space formed by the cover 100, the extension plate and the top of the refrigerator top 200 forms a negative pressure. With the help of the external atmospheric pressure, an inward pressing force is generated on the fastener, pushing the annular sealing ring on the fastener into the insertion groove of the extension plate, realizing sealing and further tightening. During the process, the magnetic blocks 330 on the outer periphery of the airbag 310 on the inner wall of the top plate of the cover 100 generate a vertical attraction with the top of the refrigerator top 200 and also attract the ferromagnetic fasteners, so that the fastener limiting blocks are tightly attached to the upper wall of the limiting groove 110 and the slider is laterally pressed against the inner wall of the slot 210, thus strengthening the snap-fit ​​effect. When the refrigerator is working, the gas in the closed space expands due to heat, causing the air pressure to rise. The one-way pressure relief valve built into the air nozzle 320 automatically opens to release pressure and prevent structural deformation. The thermally conductive silicone pad balances the temperature difference and buffers vibration. The interference fit between the elastic sealing strip 201 and the sealing groove 101 ensures circumferential sealing. Finally, through the synergistic effect of mechanical snap-fit, negative pressure reinforcement and magnetic adsorption, a screwless and stable connection between the cover 100 and the refrigerator top 200 is achieved.

[0041] In summary, the screwless fixing structure of this refrigerator top cover achieves a screwless mechanical connection between the cover 100 and the refrigerator top 200 by setting a protruding extension plate on the top of the refrigerator top 200, allowing the cover 100 to fit over the extension plate and the inner wall of the side panel to fit against the outer wall of the extension plate. After aligning the limiting groove 110 and the slot 210, a suitable fastener is inserted. Simultaneously, the magnetic block 330 on the inner wall of the top plate of the cover 100 provides auxiliary fixing, completely eliminating the traditional screw fixing method. This avoids structural damage to the refrigerator top 200 or the cover 100 caused by screw installation and solves the problem of disassembly difficulties caused by screw corrosion and stripping during long-term use. On the one hand, the fit between the extension plate and the side plate of the cover 100, combined with the precise positioning of the fasteners in the limiting groove 110 and the slot 210, ensures the positioning accuracy of the cover 100 after installation. The adsorption effect of the magnetic block 330 further supplements the fixing stability, so that the cover 100 will not shift laterally and can resist vertical vibration. The overall structure is simple and reliable. No professional tools are required for assembly. It can be fixed by simply aligning and inserting the fasteners, which greatly improves the assembly efficiency. At the same time, the disassembly process is convenient, which provides great convenience for the later maintenance and repair of the refrigerator. It achieves the dual effect of balancing installation stability and operation convenience.

[0042] The screwless fixing structure of the refrigerator top cover achieves interference prevention during installation and negative pressure reinforcement after installation by setting a fitted airbag 310 on the inner wall of the top plate of the cover 100, and cooperating with the air nozzle 320 penetrating the vent hole at the top of the cover 100. At the same time, the elasticity of the airbag 310 and the one-way pressure relief valve built into the air nozzle 320 achieve self-adaptive pressure adjustment. Before installation, the airbag 310 is inflated to a preset expansion state through the air nozzle 320 to provide a fitting gap for the cover 100 assembly, effectively avoiding installation interference between the cover 100 and the extension plate and the top of the refrigerator 200, ensuring a smooth assembly process; after installation and fixing, the airbag 310 is released. The internal gas creates a negative pressure in the enclosed space, while the external atmospheric pressure exerts an inward clamping force on the fasteners, resulting in a tighter fit between the fasteners and the limiting groove 110 and the retaining groove 210, significantly improving the fixing strength. Furthermore, in response to the high-temperature environment during refrigerator operation, the gas in the enclosed space expands due to heat, causing the pressure to rise. At this time, the one-way pressure relief valve automatically opens, releasing gas through the airbag 310 to balance the pressure and prevent excessive pressure from causing structural deformation. The elastic sealing characteristics of the airbag 310 also buffer vibrations and reduce frictional noise between structures, achieving a balance between ease of installation, reliable fixing, and environmental adaptability, thus extending the service life of the structure. The screwless fixing structure of the refrigerator top cover achieves a synergistic reinforcement of magnetic adsorption and mechanical snap-fit ​​by placing a magnetic block 330 around the airbag 310 and using a fastener made of a metal material containing ferromagnetic elements to secure it to the top of the refrigerator top 200. The vertical attraction generated between the magnetic block 330 and the top of the refrigerator top 200 tightly adheres to the cover 100 and the refrigerator top 200, reducing the gap between them. At the same time, it forms a vertical adsorption force on the fastener containing ferromagnetic elements, causing the limiting block of the fastener to press tightly against the upper wall of the limiting groove 110, and the slider to form a lateral compression with the inner wall of the groove 210. The fasteners are more securely engaged, preventing loosening due to vibration during long-term use. This combined magnetic adsorption and mechanical engagement design not only further enhances the connection stability between the cover 100 and the top of the refrigerator 200, but also helps the limiting groove 110 and the slot 210 to quickly align during assembly by using magnetic assisted positioning, improving assembly accuracy and efficiency. At the same time, magnetic reinforcement requires no additional structure, does not increase assembly complexity, and is unaffected by temperature changes, maintaining a stable reinforcement effect over a long period of time. This achieves multiple goals: strengthening fixation, simplifying assembly, and improving structural reliability.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] 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 screwless fixing structure for a refrigerator top cover, comprising a refrigerator top cover (200), wherein a cover (100) is provided on the top of the refrigerator top cover (200), characterized in that: The top of the refrigerator (200) is fixedly provided with protruding extension plates (210) around the top. The outer diameter of each extension plate (210) is smaller than the inner diameter of the corresponding side plate on the cover (100). Each extension plate (210) is provided with a slot (220). The four side plates of the cover (100) are provided with limit grooves (110) at the positions corresponding to the slots (220). A fastener (120) is slidably disposed inside the limiting groove (110), and the fastener (120) is adapted to the limiting groove (110) and the slot (220). A fastening mechanism (300) is fixedly disposed on the cover (100), and the fastening mechanism (300) includes a magnetic block (330), which is fixedly disposed on the inner wall of the top plate of the cover (100).

2. The screwless fixing structure for a refrigerator top cover according to claim 1, characterized in that, The fastening mechanism (300) further includes: An airbag (310) is fitted to the inner wall of the top plate of the cover (100); An air nozzle (320) is fixedly mounted on the airbag (310), and a vent hole is provided on the top of the cover (100), through which the air nozzle (320) passes.

3. The screwless fixing structure for a refrigerator top cover according to claim 2, characterized in that, The magnetic block (330) is disposed on the periphery of the airbag (310), and the fastener (120) and the top of the refrigerator top (200) are both made of metal material containing ferromagnetic elements.

4. The screwless fixing structure for a refrigerator top cover according to claim 1, characterized in that, The fastener (120) includes a slider and a limiting block. The size of the slider is adapted to the size of the slot (220), and the size of the limiting block is adapted to the size of the limiting groove (110). The length and width of the limiting groove (110) are greater than the length and width of the slot (220), respectively. The extension plate (210) has an embedded groove (211) on its outer wall. The embedded groove (211) is located around the card slot (220). An annular sealing ring (121) is fixed on the side of the limiting block near the embedded groove (211). The annular sealing ring (121) works in conjunction with the embedded groove (211).

5. The screwless fixing structure for a refrigerator top cover according to claim 1, characterized in that, The bottom inner side of the side panels of the cover (100) is provided with an annular sealing groove (101), and the top edge of the top of the refrigerator (200) is provided with an elastic sealing strip (201) that is interference-fitted with the sealing groove (101). The sealing strip (201) is embedded in the sealing groove (101) to form a circumferential seal.

6. The screwless fixing structure for a refrigerator top cover according to claim 2, characterized in that, A thermally conductive silicone pad is attached to the lower surface of the airbag (310). The thickness of the thermally conductive silicone pad is 0.5-1.5 mm, and the area of ​​the thermally conductive silicone pad is the same as the area of ​​the top attachment area of ​​the refrigerator top (200).

7. The screwless fixing structure for a refrigerator top cover according to claim 2, characterized in that, The top of the air nozzle (320) is provided with a sealing cap, which is threadedly connected to the air nozzle (320), and the inner wall of the sealing cap is provided with an elastic sealing gasket, which is interference-fitted with the air outlet of the air nozzle (320).

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