refrigerator

Abstract

This application relates to the field of refrigeration equipment technology, and more particularly to a refrigerator. In an embodiment of this application, the air duct assembly includes a front cover plate, a rear cover plate, and a fan. The front cover plate and the rear cover plate are fixedly connected and enclose each other to form an air duct, with the fan located within the air duct. The fan is snapped onto the rear cover plate via a snap-fit ​​structure, which helps ensure the stability of the gap between the fan and the rear cover plate along the depth direction of the refrigerator liner, providing a basis for designing a smaller gap. Moreover, since the fan is fixed to the rear cover plate, deformation of the rear cover plate has minimal impact on the gap between the fan and the rear cover plate. Furthermore, the supporting ribs of the snap-fit ​​structure extend along the airflow direction of the fan, and the end face area of ​​the supporting ribs opposite to the airflow direction is small, which can reduce the interference of the supporting ribs on the airflow of the fan.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and more particularly to a refrigerator. Background Technology

[0002] Refrigerators are an indispensable household appliance. Among them, frost-free refrigerators are widely used due to their frost-free advantage. The air duct system of a frost-free refrigerator is the core component that enables efficient cooling.

[0003] In the relevant technology, the air duct base plate and the air duct cover plate form an air duct, and the air duct base plate forms an air inlet that connects the air duct and the chamber where the evaporator is located. The fan is fixed on the air duct cover plate and is opposite to the air inlet, thereby driving the cold air after heat exchange with the evaporator to enter the air duct through the air inlet and into the storage space of the refrigerator.

[0004] When the duct cover or duct base plate shifts due to material deformation, assembly errors, or other reasons, the distance between the fan and the duct base plate will change, affecting the normal operation of the fan. Utility Model Content

[0005] This application provides a refrigerator to improve the stability of the gap between the fan and the air guide ring.

[0006] In a first aspect, embodiments of this application provide a refrigerator, which includes:

[0007] The box body contains an evaporation chamber and a storage compartment, and an evaporator is installed in the evaporation chamber;

[0008] A door, connected to the box body, is used to open or close the storage compartment;

[0009] An air duct assembly is located between the evaporation chamber and the storage compartment; the air duct assembly includes:

[0010] The air duct front cover faces the storage compartment;

[0011] The rear cover of the air duct faces the evaporation chamber and is configured to form an air inlet communicating with the evaporation chamber; the rear cover of the air duct and the front cover of the air duct are fixedly connected and enclose to form an air duct; the air duct is respectively connected to the air inlet and the storage compartment;

[0012] A fan is located inside the air duct, and the fan is configured to drive the cold air in the evaporation chamber through the air inlet and the air duct into the storage room.

[0013] The fan and the rear cover of the air duct are connected by a snap-fit ​​structure, and the snap-fit ​​structure has a supporting rib, which is located at the radial edge of the fan; the supporting rib extends along the airflow direction of the fan.

[0014] In this embodiment, the fan is snapped onto the rear cover of the duct via a snap-fit ​​structure. This helps ensure the stability of the gap between the fan and the rear cover along the depth of the casing, providing a basis for designing a smaller gap. Furthermore, since the fan is fixed to the rear cover, deformation of the rear cover has minimal impact on the gap between them. Deformation of the rear and front covers affects the gap between the fan and the front cover, but whether this gap is too large or too small has minimal impact on the airflow. Even when the fan contacts the front cover, only the fan bracket contacts the front cover, without affecting the rotation of the fan blades. Moreover, no additional support columns or screws are needed between the front and rear covers, simplifying the structure of the duct assembly and improving assembly efficiency. Furthermore, the support ribs of the snap-fit ​​structure extend along the airflow direction of the fan, and the end face area of ​​the support ribs opposite to the airflow direction is small, which can reduce the interference of the support ribs on the airflow of the fan.

[0015] In some embodiments of this application, the projection of the supporting rib toward the rear cover of the air duct along the depth direction of the housing is a curved surface extending along a first direction;

[0016] The first direction is the involute extension direction with the outer circle of the fan as the base circle.

[0017] This makes the extension direction of the support ribs closer to the airflow direction of the fan, which helps to further reduce the interference of the support ribs on the airflow.

[0018] In some embodiments of this application, the supporting rib has a first end and a second end that are opposite to each other along the axial direction of the fan, and the first end of the supporting rib is fixedly connected to the fan.

[0019] The snap-fit ​​structure also includes:

[0020] The first snap-fit ​​part is fixedly connected to the second end of the support rib part;

[0021] A second snap-fit ​​portion is formed on the rear cover of the air duct; the second snap-fit ​​portion snaps into the first snap-fit ​​portion.

[0022] In this embodiment, a first snap-fit ​​portion is formed at the end of the support rib away from the fan, and a second snap-fit ​​portion is formed on the rear cover plate of the air duct. The snap-fit ​​portion and the second snap-fit ​​portion are used to snap-fit ​​together to achieve the snap-fit ​​installation of the fan and the rear cover plate of the air duct. The structure is simple and easy to implement.

[0023] In some embodiments of this application, the second snap-fit ​​portion is configured to form a snap-fit ​​interface, and the first snap-fit ​​portion is configured to form a snap-fit ​​protrusion;

[0024] The first snap-fit ​​portion is configured to rotate relative to the second snap-fit ​​portion in a first rotation direction, so that the snap-fit ​​protrusion snaps into the snap-fit ​​interface; the first rotation direction is opposite to the rotation direction of the fan.

[0025] The first and second locking parts rotate relative to each other and lock in place, making the installation of the fan more convenient and improving the ease of assembling the duct components. Moreover, it improves the reliability and stability of the locking between the first and second locking parts, avoiding locking failure caused by the rotation of the fan.

[0026] In some embodiments of this application, the snap-fit ​​protrusion has a first end and a second end opposite to each other along the first rotation direction, the first end of the snap-fit ​​protrusion being configured to form a limiting surface, the limiting surface abutting against the end face forming the snap-fit ​​interface;

[0027] The snap-fit ​​protrusion is also configured to form a snap-fit ​​slope, which slopes from the first end to the second end of the snap-fit ​​protrusion toward the rear cover of the air duct.

[0028] The snap-fit ​​protrusion abuts against the end face forming the card interface by setting a limiting surface, preventing the snap-fit ​​protrusion from coming out of the card interface; by setting an insertion slope, the snap-fit ​​protrusion is guided into the card interface, making the rotation and snap-fit ​​of the snap-fit ​​protrusion and the card interface more convenient.

[0029] In some embodiments of this application, the second latching portion includes:

[0030] The snap-fit ​​body is opposite to and spaced apart from the rear cover plate of the air duct along the thickness direction of the rear cover plate of the air duct; the snap-fit ​​body is configured to form the snap-fit ​​interface, or the portion of the rear cover plate of the air duct opposite to the snap-fit ​​body is configured to form the snap-fit ​​interface.

[0031] The limiting part has one end connected to the snap-fit ​​body and the other end connected to the rear cover of the air duct; the limiting part abuts against the first snap-fit ​​part to limit the position of the first snap-fit ​​part along the first rotation direction.

[0032] With the above configuration, the second snap-fit ​​part forms a receiving space for the first snap-fit ​​part by setting a gap between the snap-fit ​​body and the air duct rear cover plate, and a snap-fit ​​interface is formed on the snap-fit ​​body to cooperate with the snap-fit ​​protrusion; a limiting part is set at one end of the snap-fit ​​body to abut against the first snap-fit ​​part, limiting the screw-in position of the first snap-fit ​​part and ensuring that the snap-fit ​​protrusion cooperates with the snap-fit ​​interface.

[0033] In some embodiments of this application, an air guide ring is formed on the rear cover of the air duct, and the air guide ring surrounds the air inlet;

[0034] The fan bracket and the duct rear cover are connected by the snap-fit ​​structure.

[0035] This design only requires a snap-fit ​​structure between the fan bracket and the duct rear cover to achieve the snap-fit ​​connection, without needing to impose additional restrictions on the structure of the air guide ring. The snap-fit ​​connection between the fan bracket and the duct rear cover ensures a stable gap between the fan body and the air guide ring, guaranteeing the normal operation of the fan.

[0036] In some embodiments of this application, the air duct assembly further includes:

[0037] The fan is fixed to the mounting bracket; the mounting bracket and the rear cover plate of the air duct are snapped together by the snap-fit ​​structure.

[0038] An air guide ring is provided, which encloses and forms the air inlet, and is fixedly connected to the mounting bracket.

[0039] The rear cover of the air duct is provided with an installation port, and one end of the mounting bracket connected to the air guide ring can be matched and installed in the installation port so that at least a portion of the air guide ring is located on the rear side of the rear cover of the air duct.

[0040] The air guide ring is fixed to the mounting bracket, and the fan is also fixed to the mounting bracket. This helps to ensure the stability of the gap between the air guide ring and the fan, so that the deformation of the duct back cover does not affect the gap between the air guide ring and the fan, providing a basis for designing a smaller gap between the air guide ring and the fan.

[0041] In some embodiments of this application, the mounting bracket includes:

[0042] The main body is fixedly connected to the fan;

[0043] A connecting ring that can be matched with the mounting port; the connecting ring and the body are connected to the portion of the snap-fit ​​structure;

[0044] The air guide ring is connected to the side of the connecting ring that is away from the main body.

[0045] In this embodiment, the air guide ring and the connecting ring are fixedly connected, achieving a fixed connection with the mounting bracket. This ensures that both the air guide ring and the fan are fixed relative to the mounting bracket, guaranteeing the stability of the gap between them. Furthermore, deformation of the rear and front covers of the duct does not affect the gap between the air guide ring and the fan, allowing for the design of smaller gaps. The connecting ring can be fitted into the mounting port, ensuring a tight seal between the connecting ring and the mounting port, and guaranteeing that airflow passes through the air guide ring and enters the fan.

[0046] Secondly, embodiments of this application provide a refrigerator, which includes:

[0047] The box body contains an evaporation chamber and a storage compartment, and an evaporator is installed in the evaporation chamber;

[0048] A door, connected to the box body, is used to open or close the storage compartment;

[0049] An air duct assembly is located between the evaporation chamber and the storage compartment; the air duct assembly includes:

[0050] The air duct front cover faces the storage compartment;

[0051] The rear cover of the air duct faces the evaporation chamber and is configured to form an air inlet; the rear cover of the air duct and the front cover of the air duct are fixedly connected and enclose each other to form an air duct; the air duct is respectively connected to the air inlet and the storage compartment;

[0052] A fan is located inside the air duct, and the fan is configured to drive the cold air in the evaporation chamber through the air inlet and the air duct into the storage room;

[0053] The fan is fixed to the mounting bracket; the mounting bracket and the rear cover plate of the air duct are connected by a snap-fit ​​structure, and the snap-fit ​​structure has a supporting rib, which is located at the radial edge of the fan; the supporting rib extends along the airflow direction of the fan.

[0054] In this embodiment, an additional mounting bracket is introduced to securely mount the fan. The mounting bracket is snapped onto the rear cover plate of the duct via a snap-fit ​​structure. This helps ensure the stability of the gap between the fan and the rear cover plate along the depth direction of the casing, providing a basis for designing a smaller gap. Furthermore, since the fan is fixed relative to the rear cover plate, deformation of the rear cover plate has minimal impact on the gap between the fan and the rear cover plate. Additionally, the supporting ribs of the snap-fit ​​structure extend along the airflow direction of the fan, and the small surface area of ​​the supporting ribs opposite to the airflow direction reduces interference from the supporting ribs to the fan's airflow. The additional mounting bracket for the duct assembly eliminates the need to modify the fan structure. Moreover, the mounting bracket structure is relatively small and easy to mold. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the cross-sectional structure of the air duct of a refrigerator in related technologies;

[0056] Figure 2 Cross-sectional schematic diagram of a refrigerator provided for some embodiments of this application;

[0057] Figure 3 Exploded views of air duct components provided in some embodiments of this application;

[0058] Figure 4 for Figure 3Schematic diagram of the structure of a medium-sized fan;

[0059] Figure 5 for Figure 3 Schematic diagram of the structure of a medium-sized fan;

[0060] Figure 6 for Figure 3 Enlarged schematic diagram of region P in the middle;

[0061] Figure 7 for Figure 5 Enlarged schematic diagram of the mid-Q region;

[0062] Figure 8 for Figure 3 Front view of the central air duct assembly with the front cover of the air duct removed;

[0063] Figure 9 for Figure 8 A partial schematic diagram of the AA section.

[0064] Figure 10 Exploded views of duct components provided in other embodiments of this application;

[0065] Figure 11 for Figure 10 A structural diagram showing the removal of the front and rear cover plates of the air duct.

[0066] Figure 12 for Figure 11 A schematic diagram of the cross-section;

[0067] Figure 13 for Figure 10 Rear view of the stroke duct assembly;

[0068] Figure 14 for Figure 13 BB section view in the middle;

[0069] Figure 15 for Figure 14 An enlarged schematic diagram of region M in the diagram.

[0070] Explanation of reference numerals in the attached figures:

[0071] 10: Duct base plate; 11: Airflow inlet; 20: Duct cover plate; 30: Related fans;

[0072] 100: Inner chamber; 101: Storage compartment; 102: Evaporation chamber; 110: Evaporator;

[0073] 200: Duct assembly; 201: Duct; 202: Air inlet; 203: Air outlet; 204: Return air outlet; 210: Fan; 211: Fan body; 212: Fan bracket; 2121: Lug; 220: Front cover of duct; 230: Rear cover of duct; 231: Air guide ring; 2311: Arc-shaped part; 2312: Inclined part; 232: Mounting part; 2321: Mounting port; 2322: Inclined wall part;

[0074] 300: Snap-fit ​​structure; 310: Support rib; 320: First snap-fit ​​part; 321: Snap-fit ​​protrusion; 3211: Limiting surface; 3212: Snap-in slope; 322: Plate part; 330: Second snap-fit ​​part; 331: Snap-fit ​​body; 3311: Snap-fit ​​interface; 3312: Screw-in opening; 332: Limiting part; 333: Guide part;

[0075] 400: Mounting bracket; 410: Body; 420: Connecting ring. Detailed Implementation

[0076] 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.

[0077] 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.

[0078] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0079] like Figure 1 As shown, in related technologies, the air duct structure of a refrigerator includes an air duct cover 20, an air duct base plate 10, and a fan 30. The air duct cover 20 and the air duct base plate 10 are fixedly connected, forming an air duct. The fan 30 is installed inside the air duct. An evaporation chamber for mounting the evaporator is formed on the side of the air duct base plate 10 away from the air duct cover 20, and a storage compartment for the refrigerator is formed on the side of the air duct cover 20 away from the air duct base plate 10. An airflow inlet 11 is formed on the air duct base plate 10, opposite to the fan 30; an airflow outlet is formed on the air duct cover 20 to discharge air towards the storage compartment.

[0080] When the relevant fan 30 is started, the cold air in the evaporation chamber enters the air duct through the air inlet 11 and enters the storage room through the air outlet, so as to form a low temperature storage environment in the storage room.

[0081] The fan 30 is mounted on the duct cover 20, and there is no rigid connection between the fan 30 and the duct base plate 10. When the duct cover 20 or the duct base plate 10 deforms, the distance D between the duct base plate 10 and the fan 30 changes.

[0082] If the spacing D is too small, it may cause interference between the relevant fan 30 and the air duct base plate 10, and friction between the relevant fan 30 and the air duct base plate 10 may generate noise, or even cause the relevant fan 30 to stall, affecting the normal cooling of the refrigerator.

[0083] If the spacing D is too large, it will cause the air delivery efficiency of the relevant fan 30 to decrease, and will also affect the cooling effect of the refrigerator.

[0084] During the rotation of the relevant fan 30, the high-pressure airflow diffuses to the surrounding area of ​​the fan blades. The high-pressure air mass is approximately cylindrical. The normal air pressure of the cylinder is relatively high, while the axial air pressure is relatively low. The air diffuses from the high-pressure area to the low-pressure area, and some of it diffuses between the relevant fan 30 and the edge of the airflow inlet 11 of the duct bottom plate 10.

[0085] The smaller the distance D between the relevant fan 30 and the duct base plate 10, the more difficult the airflow diffusion becomes, and the less likely it is to intersect with the airflow at the air inlet 11. Conversely, the larger the distance D, the easier the airflow diffusion becomes, and the more obvious the intersection with the airflow at the air inlet 11, resulting in a greater impact on performance. Therefore, the design principle of the duct structure is to design the distance D to be as small as possible while ensuring structural safety.

[0086] However, when the spacing D is small, if the duct cover 20 or the duct base plate 10 is deformed, interference between the foundation base plate and the related fan 30 may occur, resulting in noise.

[0087] Therefore, in related technologies, a support column is installed between the duct base plate 10 and the duct cover plate 20, and fixed with screws. However, due to the limitation of screw size, the diameter of the support column is relatively large. For example, in the duct structure of a certain type of refrigerator, the outer diameter of the screw column is 7mm, and the diameter of the support column where the screw head is located is about 14mm. The support column is located in the direction of gas flow, affecting the gas flow.

[0088] Therefore, two support columns are usually provided. Due to the limitation of the number of support columns, when the duct base plate 10 deforms, there is still a possibility that the fan blades of the relevant fan 30 will interfere with the duct base plate 10. For this reason, it is necessary to design a large value for the distance D between the relevant fan 30 and the duct base plate 10, for example, a distance D of 5mm is usually required, which will still sacrifice air supply efficiency.

[0089] In view of this, the air duct assembly of the present application embodiment has an air inlet connecting the air duct and the evaporation chamber on the air duct rear cover plate, and the fan is snapped onto the air duct rear cover plate, which helps to ensure the stability of the distance between the fan and the air duct rear cover plate. In addition, the supporting rib between the fan and the air duct rear cover plate extends along the airflow direction of the fan outlet, reducing the impact on the airflow of the air duct.

[0090] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0091] Combination Figure 2 Some embodiments of this application provide a refrigerator, which includes a cabinet that can be configured to form a storage compartment 101 with an access opening for storing items.

[0092] Multiple storage compartments 101 can be provided to expand storage space. Depending on the storage temperature of the storage compartments 101, they can include at least one refrigerated compartment and at least one frozen compartment. The internal temperature of the refrigerated compartment can be maintained between approximately 0°C and 5°C for storing items in refrigeration mode; the internal temperature of the frozen compartment can be maintained between approximately -30°C and 0°C for storing items in freezing mode.

[0093] In some possible implementations, at least one of the storage chambers 101 may also be configured as a vacuum chamber or a variable temperature chamber, etc., which will not be described in detail in the embodiments of this application.

[0094] For example, two storage compartments 101 can be provided, which can be stacked vertically or arranged side by side horizontally. One of them can be a refrigerator compartment and the other can be a freezer compartment.

[0095] In some embodiments, combined with Figure 2The refrigerator body may include a refrigerator liner 100 and a refrigerator shell. The refrigerator liner 100 may be configured to form a storage compartment 101 with a front opening, which serves as an access port. The refrigerator shell may be attached to the outside of the refrigerator liner 100 to form the appearance of the refrigerator.

[0096] The refrigerator of this embodiment may further include a refrigeration system for reducing the air temperature in the storage compartment 101. Exemplarily, the refrigeration system may be housed within the refrigerator body. The refrigeration system may include a compressor, a condenser, a throttling device, and an evaporator 110 connected in a cycle.

[0097] During refrigeration system operation, the compressor compresses refrigerant vapor to generate high-temperature, high-pressure refrigerant vapor, which is then transported to the condenser. The condenser liquefies the high-temperature, high-pressure refrigerant vapor, generating high-temperature, low-pressure refrigerant liquid, which is then transported to the expansion valve. The expansion valve reduces the pressure of the refrigerant liquid, transforming the high-pressure, low-temperature refrigerant liquid into a low-pressure, low-temperature refrigerant liquid, which is then transported to the evaporator 110. The evaporator 110 receives the low-pressure, low-temperature refrigerant liquid and boils it under isobaric conditions, absorbing heat and vaporizing to form refrigerant vapor, thereby lowering the temperature inside the storage compartment 101.

[0098] The refrigerator in this embodiment may further include a door connected to the cabinet body to open or close the access port. Exemplarily, the door is hinged to the cabinet body.

[0099] Each storage room 101 may be provided with one door; or, each storage room 101 may be provided with two doors, which may rotate in opposite directions to open or close the storage room 101.

[0100] Of course, in some possible implementations, the storage room 101 is equipped with drawers, and the outer end of the drawers forms a door.

[0101] Continue to refer to Figure 2 The box also contains an evaporation chamber, which houses an evaporator 110. The evaporation chamber is located at the rear of the storage compartment 101.

[0102] The refrigerator in this embodiment of the application also includes an air duct assembly 200, which is located between the evaporation chamber and the storage compartment 101. The air duct assembly 200 is located inside the cabinet liner 100, dividing the space inside the cabinet liner 100 into the evaporation chamber and the storage compartment 101. The storage compartment 101 is located on the front side of the air duct assembly 200, and the evaporation chamber is located on the rear side of the air duct assembly 200.

[0103] Continue to refer to Figure 2 The air duct assembly 200 is configured to form an air duct 201, so that cold air in the evaporation chamber can flow into the storage chamber 101 to achieve a low-temperature storage environment in the storage chamber 101.

[0104] The air duct assembly 200 also forms an air inlet 202, which connects the air duct 201 and the evaporation chamber. The air inlet 202 is located on the side of the air duct assembly 200 facing the evaporation chamber. Along the height of the refrigerator, the air inlet 202 is located above the evaporator 110, so that the air inlet 202 communicates with the top of the evaporation chamber. In this way, the cold air after heat exchange in the evaporator 110 can enter the air duct 201 through the air inlet 202.

[0105] The air duct assembly 200 also forms an air outlet 203, which connects the air duct 201 and the storage compartment 101. The air outlet 203 is located on the side of the air duct assembly 200 facing the storage compartment 101. Multiple air outlets 203 can be provided, and the multiple air outlets 203 are arranged in an array on the air duct assembly 200 to improve the temperature uniformity within the storage compartment 101.

[0106] In some embodiments, a gap is formed between the bottom end of the air duct assembly 200 and the inner casing 100 to form a return air vent 204. The return air vent 204 faces the storage compartment 101 and is located below the air outlet 203. The return air vent 204 connects the storage compartment 101 and the bottom end of the evaporator chamber, and the position where the return air vent 204 communicates with the evaporator chamber is located below the evaporator chamber. In this way, the cold air from the return air vent 204 can pass through the evaporator 110 and exchange heat as much as possible.

[0107] The air duct assembly 200 includes a fan 210 located in the air duct 201, which powers the circulation of cold air between the storage compartment 101 and the evaporation chamber. The fan 210 is opposite to the air inlet 202, which creates a negative pressure at the air inlet 202, improving the efficiency of cold air entering the storage compartment 101 from the evaporation chamber.

[0108] For example, the air inlet 202 is a circular opening that matches the shape of the fan 210.

[0109] like Figure 2 As shown, with the above configuration, under the action of the fan 210, the cold air in the evaporation chamber, after heat exchange with the evaporator 110, enters the air duct 201 through the air inlet 202, and then enters the storage chamber 101 through the air outlet 203; the air in the storage chamber 101 returns to the evaporation chamber through the return air inlet 204 and exchanges heat with the evaporator 110. This cycle repeats, lowering the temperature of the storage chamber. Figure 2 The dotted line with an arrow indicates the direction of the cold air flow.

[0110] exist Figure 2 The storage compartment 101 shown is a freezer compartment. A refrigerated air duct 201 is also connected to the top of the air duct assembly 200 to provide cold air to the refrigerated compartment.

[0111] Continue to refer to Figure 2The air duct assembly 200 also includes: an air duct front cover 220 facing the storage compartment 101. An air outlet 203 is formed on the air duct front cover 220.

[0112] The air duct assembly 200 also includes a rear air duct cover 230, which faces the evaporation chamber and forms an air inlet 202. The rear air duct cover 230 is located behind the front air duct cover 220, and the rear air duct cover 230 and the front air duct cover 220 are fixedly connected and enclose the air duct 201. There is a gap between the rear air duct cover 230 and the rear wall of the chamber 100 to form the evaporation chamber.

[0113] For example, the rear cover plate 230 of the air duct is snapped together with the front cover plate 220 of the air duct, and the connection method is simple and reliable.

[0114] like Figure 3 As shown, the rear cover plate 230 of the air duct has an air guide ring 231, which encloses to form an air inlet 202. The air guide ring 231 guides the airflow into the air duct 201.

[0115] Combination Figure 3 The fan 210 and the duct rear cover 230 are connected by a snap-fit ​​structure 300.

[0116] In some embodiments, the fan 210 includes a fan bracket 212 and a fan body 211. The fan body 211 includes a motor and multiple fan blades, and the motor drives the multiple fan blades to rotate. The motor is fixed to the fan bracket 212. The fan bracket 212 is snapped into the rear cover plate 230 of the air duct via a snap-fit ​​structure 300.

[0117] Thus, the fan 210 is snapped into the rear cover plate 230 of the air duct, which helps to ensure the stability of the gap between the fan 210 and the air guide ring 231 along the depth direction of the casing 100, providing a basis for designing a smaller gap. Moreover, since the fan 210 is fixed to the rear cover plate 230 of the air duct, the deformation of the rear cover plate 230 of the air duct has little impact on the relationship between the fan 210 and the air guide ring 231. Furthermore, the deformation of the rear cover plate 230 and the front cover plate 220 of the air duct affects the gap between the fan 210 and the front cover plate 220 of the air duct, but whether this gap is too large or too small has little impact on the flow of cold air. Even when the fan 210 is in contact with the front cover plate 220 of the air duct, it is only the fan bracket 212 that is in contact with the front cover plate 220 of the air duct, which does not affect the rotation of the fan blades of the fan 210.

[0118] Even when the rear cover plate 230 of the air duct deforms, the fan 210 is located in a less convenient position due to the deformation of the rear cover plate 230 of the air duct. The impact on the distance between the fan 210 and the rear cover plate 230 along the depth direction of the box liner 100 is small and can even be ignored.

[0119] Moreover, no additional support columns or screws are needed between the front cover plate 220 and the rear cover plate 230 of the air duct, which simplifies the structure of the air duct assembly 200 and helps to improve the assembly efficiency of the air duct assembly 200.

[0120] This allows for the design of a smaller gap between the fan 210 and the air guide ring 231. For example, the gap between the fan 210 and the air guide ring 231 can be reduced from 5mm to 3mm. This can increase the airflow of the fan 210 by about 4%.

[0121] In some embodiments of this application, the snap-fit ​​structure 300 has a support rib 310 located at the radial edge of the fan 210. The support rib 310 extends along the airflow direction of the fan 210.

[0122] The fan body 211 is located near the rear cover plate 230 of the duct relative to the fan bracket 212, and is situated within the gap between the fan bracket 212 and the rear cover plate 230. When the fan bracket 212 is engaged with the rear cover plate 230 of the duct via the snap-fit ​​structure 300, the snap-fit ​​structure 300 has a supporting rib 310, which is located within the gap between the fan bracket 212 and the rear cover plate 230 of the duct, thereby achieving the snap-fit ​​between the fan bracket 212 and the rear cover plate 230 of the duct.

[0123] In this embodiment, the support rib 310 extends along the airflow direction of the fan 210, and the end face area of ​​the support rib 310 opposite to the airflow direction is small, which can reduce the interference of the support rib 310 on the airflow of the fan 210.

[0124] like Figure 4 As shown, the fan 210 rotates counterclockwise during operation. When the fan 210 rotates, the airflow flows along the involute direction of the outer circumference of the fan 210.

[0125] Among some of the possible implementations, such as Figure 4 As shown, the projection of the support rib 310 toward the rear cover plate 230 of the air duct along the depth direction of the box is a curved surface extending along the first direction A.

[0126] The support rib 310 has a first end and a second end along a first direction A; along a second rotation direction C, the distance between the support rib 310 and the center of the fan 210 increases from the first end to the second end. The second rotation direction C is the rotation direction of the fan 210 during operation.

[0127] Wherein, the first direction A can be the direction of oblique line extension, the direction of arc extension, or the direction of involute extension.

[0128] With this configuration, the angle between the extension direction of the support rib 310 and the direction of the airflow is smaller, which can reduce the contact area between the support rib 310 and the airflow and reduce the interference of the support rib 310 on the airflow of the fan 210.

[0129] In some embodiments of this application, the first direction A is the involute extension direction with the outer circle of the fan 210 as the base circle.

[0130] The involute is the trajectory of any point on a moving straight line (generating line) as it rolls purely along a fixed circle (base circle). The first direction A starts from a point on the outer circle of the fan 210 as the base circle and is formed by rolling in the second rotational direction C when the fan 210 is working.

[0131] This makes the extension direction of the support rib 310 closer to the airflow direction of the fan 210, which helps to further reduce the interference of the support rib 310 on the airflow.

[0132] Among them, the largest circle of the projection of the fan 210 toward the rear cover plate 230 of the air duct along the depth direction of the housing is the outer circle of the fan 210.

[0133] It should be noted here that, as Figure 3 and Figure 4 As shown, three snap-fit ​​structures 300 are provided, and the three snap-fit ​​structures 300 are evenly spaced along the circumference of the fan 210. However, this is not a limitation on the number of snap-fit ​​structures 300; for example, there can be two, four, or more snap-fit ​​structures 300. Multiple snap-fit ​​structures 300 can ensure the stability of the fan 210 snapping onto the rear cover plate 230 of the air duct, and the evenly spaced snap-fit ​​structures 300 help improve the balance of force on the fan 210.

[0134] Reference Figure 5 In some embodiments of this application, the support rib 310 has a first end and a second end that are opposite to each other along the axial direction of the fan 210. The first end of the support rib 310 is fixedly connected to the fan 210.

[0135] The first end of the support rib 310 is fixedly connected to the fan bracket 212. For example, the edge of the fan bracket 212 forms a lug 2121, and the support rib 310 is fixedly connected to the lug 2121 to prevent the setting of the support rib 310 from affecting the rotation of the fan body 211.

[0136] For example, the support rib 310 and the fan bracket 212 are integrally formed, which helps to ensure the reliability of the connection between the support rib 310 and the fan 210; moreover, it makes the support rib 310 easier to form.

[0137] Continue to refer to Figure 5The snap-fit ​​structure 300 further includes a first snap-fit ​​part 320, which is fixedly connected to the second end of the support rib part 310.

[0138] For example, the first snap-fit ​​portion 320 and the support rib portion 310 are integrally formed, which helps to ensure the structural strength between the first snap-fit ​​portion 320, the support rib portion 310 and the fan bracket 212.

[0139] Combination Figure 3 The snap-fit ​​structure 300 also includes a second snap-fit ​​portion 330, which is formed on the rear cover plate 230 of the air duct; the second snap-fit ​​portion 330 snaps with the first snap-fit ​​portion 320.

[0140] The second snap-fit ​​part 330 can be provided on the side of the rear cover plate 230 of the air duct facing the front cover plate 220 of the air duct.

[0141] In this embodiment, a first snap-fit ​​portion 320 is formed at the end of the support rib 310 away from the fan 210, and a second snap-fit ​​portion 330 is formed on the rear cover plate 230 of the air duct. The snap-fit ​​portion 320 and the second snap-fit ​​portion 330 are used to snap-fit ​​together, thereby realizing the snap-fit ​​installation of the fan 210 and the rear cover plate 230 of the air duct. The structure is simple and easy to implement.

[0142] In some possible implementations, the first engaging portion 320 is rotatably engaged with the second engaging portion 330, and the first rotation direction R of the first engaging portion 320 relative to the second engaging portion 330 is opposite to the rotation direction of the fan 210. Thus, when the fan 210 rotates, the first engaging portion 320 is subjected to a force from the second engaging portion 330 in the opposite direction to the rotation of the fan 210, making the engagement between the fan 210 and the duct rear cover 230 more stable and preventing the first engaging portion 320 and the second engaging portion 330 from separating due to vibration of the fan 210.

[0143] Combination Figure 6 The second card connector 330 is configured to form a card interface 3311; combined with Figure 7 The first latching portion 320 is configured to form a latching protrusion 321. The latching protrusion 321 is latched to the second latching portion 330 through the latching interface 3311.

[0144] The first snap-fit ​​portion 320 includes a plate portion 322 and a snap-fit ​​protrusion 321. The plate portion 322 is connected to the support rib portion 310. The plate portion 322 can be arranged parallel to the rear cover plate 230 of the air duct, and the plate portion 322 contacts the rear cover plate 230 of the air duct. The snap-fit ​​protrusion 321 is provided on the plate portion 322. Figure 7 In the middle, the snap-fit ​​protrusion 321 is provided on the side of the plate body 322 facing the support rib 310.

[0145] The first latching portion 320 is configured to rotate relative to the second latching portion 330 in a first rotation direction R, so that the latching protrusion 321 engages with the card interface 3311; the first rotation direction R is opposite to the rotation direction of the fan 210.

[0146] The first snap-fit ​​part 320 and the second snap-fit ​​part 330 are rotated and snap-fitted together, making the installation of the fan 210 more convenient and improving the ease of assembly of the air duct assembly 200. Moreover, it is beneficial to the reliability and stability of the snap-fit ​​between the first snap-fit ​​part 320 and the second snap-fit ​​part 330, and avoids snap-fit ​​failure caused by the rotation of the fan 210.

[0147] Combination Figure 7 The snap-fit ​​protrusion 321 has a first end and a second end relative to each other along the first rotation direction R, and the first end of the snap-fit ​​protrusion 321 is configured to form a limiting surface 3211. Figure 8 and Figure 9 The limiting surface 3211 abuts against the end face of the forming card interface 3311. The limiting surface 3211 is perpendicular to the plate body portion 322.

[0148] The snap-fit ​​protrusion 321 also forms a snap-fit ​​inclined surface 3212, which is inclined from the first end to the second end of the snap-fit ​​protrusion 321 toward the rear cover plate 230 of the air duct.

[0149] exist Figure 7 In the middle, the inclined surface 3212 is inclined from the first end to the second end of the snap-fit ​​protrusion 321 toward the plate body 322.

[0150] Therefore, the snap-fit ​​protrusion 321 abuts against the end face forming the card interface 3311 by setting a limiting surface 3211, preventing the snap-fit ​​protrusion 321 from coming out of the card interface 3311; by setting an insertion inclined surface 3212, the snap-fit ​​protrusion 321 is guided to snap into the card interface 3311, making the rotation and snap-fit ​​of the snap-fit ​​protrusion 321 and the card interface 3311 more convenient.

[0151] Continue to refer to Figure 6 In some embodiments of this application, the second snap-fit ​​portion 330 includes a snap-fit ​​body 331, which is opposite to and spaced from the rear cover plate 230 of the air duct along the thickness direction of the rear cover plate 230. The gap between the snap-fit ​​body 331 and the rear cover plate 230 of the air duct provides a receiving space for the first snap-fit ​​portion 320.

[0152] In some embodiments, the card connector 331 is configured to form a card interface 3311, such as Figure 9 As shown. At this time, the snap-fit ​​protrusion 321 is located on the side of the plate body 322 facing the support rib 310. In this way, the structure of the air duct rear cover 230 is complete, and no opening is required, which helps to ensure the relative sealing of the air duct 201.

[0153] In other embodiments, the portion of the duct rear cover 230 opposite to the snap-fit ​​body 331 forms a snap-fit ​​interface 3311. That is, the snap-fit ​​interface 3311 is formed on the duct rear cover 230, and the snap-fit ​​interface 3311 and the snap-fit ​​body 331 are opposite each other along the thickness direction of the duct rear cover 230. In this case, the snap-fit ​​protrusion 321 is located on the side of the plate portion 322 away from the support rib portion 310. Thus, compared with the snap-fit ​​body 331, the duct rear cover 230 has greater structural strength, ensuring stable snap-fit ​​between the snap-fit ​​protrusion 321 and the snap-fit ​​interface 3311, while reducing the possibility of snap-fit ​​failure due to failure of the surrounding structure of the snap-fit ​​interface 3311.

[0154] Continue to refer to Figure 6 The second snap-fit ​​portion 330 also includes a limiting portion 332. One end of the limiting portion 332 is connected to the snap-fit ​​body 331, and the other end of the limiting portion 332 is connected to the rear cover plate 230 of the air duct. The limiting portion 332 abuts against the first snap-fit ​​portion 320 to limit the position of the first snap-fit ​​portion 320 along the first rotation direction R.

[0155] The limiting part 332 is connected to one end of the snap-fit ​​body 331 along the first rotation direction R, and the other end of the snap-fit ​​body 331 along the first rotation direction R forms a screw-in opening 3312. In this way, the first snap-fit ​​part 320 enters the gap between the snap-fit ​​body 331 and the air duct rear cover plate 230 through the screw-in opening 3312. When the first snap-fit ​​part 320 abuts against the limiting body, the snap-fit ​​protrusion 321 snaps into the snap-fit ​​interface 3311, completing the rotation snap-fit ​​of the fan 210.

[0156] Continue to refer to Figure 6 The second snap-fit ​​portion 330 also includes a guide portion 333. One end of the guide portion 333 is connected to the snap-fit ​​body 331, and the other end of the guide portion 333 is connected to the rear cover plate 230 of the air duct. The guide portion 333 is located on the side of the snap-fit ​​body 331 that is radially opposite to the air guide ring 231. The guide portion 333 extends along the first rotation direction R.

[0157] During the rotation and insertion of the fan 210, the guide part 333 abuts against the plate part 322 of the first snap-fit ​​part 320, limiting and guiding the first snap-fit ​​part 320, so that the snap-fit ​​protrusion 321 can snap into the snap-fit ​​interface 3311.

[0158] Continue to refer to Figure 6 The end of the snap-fit ​​body 331 facing the screw-in opening 3312 is grounded with the support rib 310, further restricting the position of the first snap-fit ​​part 320 screwing into the second snap-fit ​​part 330. Since the support rib 310 is curved, the end face of the snap-fit ​​body 331 facing the rotation opening is also curved and matches the support rib 310.

[0159] With the above configuration, the second snap-fit ​​part 330 forms a receiving space for the first snap-fit ​​part 320 by setting the snap-fit ​​body 331 and the air duct rear cover plate 230 to be spaced apart, and a snap-fit ​​interface 3311 is formed on the snap-fit ​​body 331 to cooperate with the snap-fit ​​protrusion 321; a limiting part 332 is provided at one end of the snap-fit ​​body 331 to abut against the first snap-fit ​​part 320, limiting the screw-in position of the first snap-fit ​​part 320, and ensuring that the snap-fit ​​protrusion 321 cooperates with the snap-fit ​​interface 3311.

[0160] Combination Figure 3 and Figure 5 In some implementations of this application, an air guide ring 231 is formed on the rear cover plate 230 of the air duct, and the air guide ring 231 surrounds and forms an air inlet 202. That is, the air guide ring 231 and the rear cover plate 230 of the air duct are integrally formed.

[0161] The fan bracket 212 of the fan 210 is connected to the rear cover plate 230 of the air duct via a snap-fit ​​structure 300.

[0162] With this configuration, only a snap-fit ​​structure 300 is needed to connect the fan bracket 212 and the rear cover plate 230 of the duct to achieve the snap-fit ​​connection; no additional restrictions are required on the structure of the guide ring 231. The snap-fit ​​connection between the fan bracket 212 and the rear cover plate 230 of the duct ensures a stable gap between the fan body 211 and the guide ring 231, guaranteeing the normal operation of the fan 210.

[0163] Reference Figure 10 In other implementations of this application, the duct assembly 200 further includes a mounting bracket 400, to which the fan 210 is fixed. The mounting bracket 400 is snapped into the duct rear cover plate 230 via a snap-fit ​​structure 300.

[0164] For example, the first snap-fit ​​portion 320 is integrally formed with the mounting bracket 400, which helps to ensure the stability of the connection between the first snap-fit ​​portion 320 and the mounting bracket 400.

[0165] Therefore, the additional mounting bracket 400 is used to fix the fan 210 without requiring any modifications to the structure of the fan 210. Furthermore, as an independent structure, the mounting bracket 400 is small in size, and injection molding deformation is easy to control. Moreover, the mounting bracket 400 can utilize materials with better rigidity and structural strength, ensuring its structural stability, while having a relatively small impact on cost.

[0166] For example, the mounting bracket 400 can be made of ABS+glass fiber material, or it can be made of POM (Polyoxymethylene), etc.

[0167] Therefore, the air duct assembly 200 of this application embodiment additionally introduces a mounting bracket 400, which is fixedly connected to the fan 210, and the mounting bracket 400 is snapped into the air duct rear cover plate 230 through a snap-fit ​​structure 300, so that there is no need to modify the structure of the fan 210. Moreover, the mounting bracket 400 has a relatively small structure, which is easy to form.

[0168] Reference Figure 11 The mounting bracket 400 is ring-shaped and fixedly connected to the fan bracket 212. For example, the mounting bracket 400 and the fan bracket 212 are connected by screws, which can utilize the previous fixed structure of the fan bracket 212 without changing the structure of the fan 210.

[0169] An elastic element can be installed between the mounting bracket 400 and the fan 210. The elastic element absorbs the vibration of the fan 210 during operation and reduces noise.

[0170] For example, refer to Figure 12 The fan bracket 212 has a lug 2121 with a mounting hole, and an elastic plug, acting as an elastic element, passes through the mounting hole. The mounting bracket 400 is constructed to form a connecting post, which has a threaded hole. The connecting post passes through the elastic plug, and a screw is threaded into the threaded hole. One end of the elastic plug forms a washer portion, located between the mounting bracket 400 and the lug 2121; the other end of the elastic plug forms a washer portion, located between the lug 2121 and the head of the screw.

[0171] exist Figure 12 In the illustrated embodiment, the snap-fit ​​protrusion 321 is located on the side of the plate portion 322 opposite to the support rib portion 310; combined with Figure 10 The card interface 3311 is formed on the rear cover plate 230 of the air duct.

[0172] In some embodiments of this application, reference is made to Figure 10 and Figure 11 The rear cover plate 230 of the air duct is provided with an installation port. The installation port is a circular installation port.

[0173] The air duct assembly 200 also includes an air guide ring 231, which encloses and forms an air inlet 202, and the air guide ring 231 is fixedly connected to the mounting bracket 400.

[0174] The air guide ring 231 can be fixedly connected to the mounting bracket 400 via an additional connecting post. Alternatively, the air guide ring 231 can be connected to the mounting bracket 400 via a snap-fit ​​structure 300, thus eliminating the need for an additional connecting structure. This reduces the structural bulk of the radial side of the fan 210, thereby minimizing interference with the outlet airflow.

[0175] For example, the air guide ring 231 is connected to the side of the first snap-fit ​​portion 320 facing the fan 210, thus achieving a fixed connection between the air guide ring 231 and the mounting bracket 400 along the thickness direction of the air duct rear cover plate 230, while also preventing the air guide ring 231 from affecting the snap-fit ​​between the first snap-fit ​​portion 320 and the second snap-fit ​​portion 330.

[0176] Among them, the air guide ring 231, the first snap-fit ​​part 320, the support rib part 310 and the mounting bracket 400 are integrally formed, which not only facilitates processing and forming, but also helps to ensure the stability of the connection between them.

[0177] The end of the mounting bracket 400 connected to the air guide ring 231 can be installed in the mounting port so that the air guide ring 231 extends through the mounting port to the rear side of the air duct cover plate 230 to guide the cold airflow into the fan 210.

[0178] With this configuration, the air guide ring 231 is fixed to the mounting bracket 400, and the fan 210 is fixed to the mounting bracket 400. This helps to ensure the stability of the gap between the air guide ring 231 and the fan 210, so that the deformation of the duct back cover plate 230 does not affect the gap between the air guide ring 231 and the fan 210, and provides the possibility of designing a smaller gap between the air guide ring 231 and the fan 210.

[0179] Continue to refer to Figure 9 In some embodiments, the mounting bracket 400 includes a body portion 410, which is fixedly connected to the fan 210. The body portion 410 is annular and is fixedly connected to the fan 210 by screws.

[0180] The mounting bracket 400 also includes a connecting ring 420 that can be matched with the mounting port. The connecting ring 420 is annular, and the connecting ring 420 and the body portion 410 are connected by a snap-fit ​​structure 300, wherein the first snap-fit ​​portion 320 of the snap-fit ​​structure 300 is connected between the connecting ring 420 and the body portion 410.

[0181] Reference Figures 13 to 15 The air guide ring 231 is connected to the side of the connecting ring 420 away from the main body 410.

[0182] For example, the air guide ring 231, the connecting ring 420, the first snap-fit ​​part 320, the support rib part 310, and the mounting bracket 400 are integrally formed as a single piece.

[0183] The connecting ring 420 can be fitted into the mounting port so that at least a portion of the air guide ring 231 is located on the rear side of the air duct rear cover plate 230.

[0184] Combination Figure 14 and Figure 15The rear cover plate 230 of the air duct defines a mounting portion 232, which encloses a mounting opening. The mounting portion 232 mates with the connecting ring 420.

[0185] The contact surface between the mounting part 232 and the connecting ring 420 is non-planar, ensuring the sealing of the contact between the air duct rear cover 230 and the connecting ring 420.

[0186] For example, a stepped contact surface is formed between the mounting part 232 and the connecting ring 420 to improve the reliability of the surface contact seal between the mounting part 232 and the connecting ring 420.

[0187] For example, a curved contact surface may be formed between the mounting portion 232 and the connecting ring 420; or, the contact surface between the mounting portion 232 and the connecting ring 420 may include a bent surface and a curved surface.

[0188] In some embodiments, combined with Figure 15 The mounting portion 232 defines an inclined wall portion 2322, and the ends of the inclined wall portion 2322 are enclosed to form a mounting opening.

[0189] The air guide ring 231 may include an arc-shaped portion 2311 and an inclined portion 2312. The arc-shaped portion 2311 protrudes rearward, and the inclined portion 2312 is connected to the outer end of the arc-shaped portion 2311. The inclined portion 2312 is connected to the connecting ring 420. The end of the inclined portion 2312 connected to the connecting ring 420 is inclined away from the center of the air inlet 202.

[0190] The inclined wall portion 2322 is located outside the inclined portion 2312 and is in contact with the inclined portion 2312, so that the air guide ring 231 and the mounting portion 232 form a beveled contact to ensure the sealing of the contact between the air guide ring 231 and the mounting portion 232.

[0191] Therefore, in this embodiment, the air guide ring 231 is fixedly connected to the connecting ring 420, thus achieving a fixed connection with the mounting bracket 400. On the one hand, the air guide ring 231 can be integrally formed with the mounting bracket 400, reducing the structural complexity of the rear cover plate 230 of the air duct. On the other hand, both the air guide ring 231 and the fan 210 are fixed relative to the mounting bracket 400, which can ensure the stability of the gap between the air guide ring 231 and the fan 210. Moreover, the deformation of the rear cover plate 230 and the front cover plate 220 of the air duct does not affect the gap between the air guide ring 231 and the fan 210, providing the possibility of designing a smaller gap.

[0192] Even when the mounting edge of the air duct rear cover plate 230 is partially deformed, it can cause the position of the connecting ring 420 of the mounting bracket 400 to change. This position change can be absorbed by the snap-fit ​​structure 300, the connection between the fan 210 and the mounting bracket 400, thereby reducing the impact on the gap between the air guide ring 231 and the fan 210.

[0193] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0194] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that, include: The box body is provided with an evaporation chamber and a storage room (101), and an evaporator (110) is installed in the evaporation chamber; A door, connected to the box body, is used to open or close the storage room (101); A duct assembly (200) is located between the evaporation chamber and the storage compartment (101); the duct assembly (200) includes: The air duct front cover (220) faces the storage compartment (101); The rear cover plate (230) of the air duct faces the evaporation chamber and is configured to form an air inlet (202) communicating with the evaporation chamber; the rear cover plate (230) of the air duct and the front cover plate (220) of the air duct are fixedly connected and enclose to form an air duct (201); the air duct (201) is respectively connected to the air inlet (202) and the storage chamber (101); A fan (210) is located in the air duct (201). The fan (210) is configured to drive the cold air in the evaporation chamber through the air inlet (202) and the air duct (201) into the storage room (101). The fan (210) and the duct rear cover plate (230) are connected by a snap-fit ​​structure (300), and the snap-fit ​​structure (300) has a support rib (310) located at the radial edge of the fan (210); the support rib (310) extends along the airflow direction of the fan (210).

2. The refrigerator according to claim 1, characterized in that, The projection of the supporting rib (310) toward the air duct rear cover plate (230) along the depth direction of the box body is a curved surface extending along the first direction; The first direction is the involute extension direction with the outer circle of the fan (210) as the base circle.

3. The refrigerator according to claim 1, characterized in that, The support rib (310) has a first end and a second end that are opposite to each other along the axial direction of the fan (210), and the first end of the support rib (310) is fixedly connected to the fan (210); The snap-fit ​​structure (300) also includes: The first snap-fit ​​part (320) is fixedly connected to the second end of the support rib part (310); A second snap-fit ​​portion (330) is formed on the rear cover plate (230) of the air duct; the second snap-fit ​​portion (330) snaps into the first snap-fit ​​portion (320).

4. The refrigerator according to claim 3, characterized in that, The second latching portion (330) is configured to form a latching interface (3311), and the first latching portion (320) is configured to form a latching protrusion (321); The first snap-fit ​​portion (320) is configured to rotate relative to the second snap-fit ​​portion (330) in a first rotation direction so that the snap-fit ​​protrusion (321) snaps into the snap-fit ​​interface (3311); the first rotation direction is opposite to the rotation direction of the fan (210).

5. The refrigerator according to claim 4, characterized in that, The snap-fit ​​protrusion (321) has a first end and a second end opposite to each other along the first rotation direction. The first end of the snap-fit ​​protrusion (321) is configured to form a limiting surface (3211), which abuts against the end face forming the snap-fit ​​interface (3311). The snap-fit ​​protrusion (321) is also configured to form a snap-fit ​​ramp (3212), which is inclined from the first end to the second end of the snap-fit ​​protrusion (321) toward the rear cover plate (230) of the air duct.

6. The refrigerator according to claim 4, characterized in that, The second latching part (330) includes: A snap-fit ​​body (331) is provided, wherein the snap-fit ​​body (331) and the rear cover plate (230) of the air duct are opposite to each other along the thickness direction of the rear cover plate (230) and are spaced apart; the snap-fit ​​body (331) is configured to form the snap-fit ​​interface (3311), or the portion of the rear cover plate (230) opposite to the snap-fit ​​body (331) is configured to form the snap-fit ​​interface (3311); A limiting part (332) is provided, one end of which is connected to the snap-fit ​​body (331), and the other end of which is connected to the air duct rear cover plate (230). The limiting part (332) abuts against the first snap-fit ​​part (320) to limit the position of the first snap-fit ​​part (320) along the first rotation direction.

7. The refrigerator according to any one of claims 1-6, characterized in that, An air guide ring (231) is formed on the rear cover plate (230) of the air duct, and the air guide ring (231) surrounds the air inlet (202); The fan bracket (212) of the fan (210) is connected to the rear cover plate (230) of the air duct through the snap-fit ​​structure (300).

8. The refrigerator according to any one of claims 1-6, characterized in that, The air duct assembly (200) also includes: Mounting bracket (400), the fan (210) is fixed to the mounting bracket (400); the mounting bracket (400) and the air duct rear cover plate (230) are snapped together by the snap-fit ​​structure (300); An air guide ring (231) is formed around the air inlet (202), and the air guide ring (231) is fixedly connected to the mounting bracket (400); The rear cover plate (230) of the air duct is provided with an installation port. The end of the mounting bracket (400) connected to the air guide ring (231) can be matched and installed in the installation port so that at least a portion of the air guide ring (231) is located on the rear side of the rear cover plate (230) of the air duct.

9. The refrigerator according to claim 8, characterized in that, The mounting bracket (400) includes: The main body (410) is fixedly connected to the fan (210); A connecting ring (420) is compatible with the mounting port; the connecting ring (420) and the body part (410) are connected to the portion of the snap-fit ​​structure (300); The air guide ring (231) is connected to the side of the connecting ring (420) away from the main body (410).

10. A refrigerator, characterized in that, include: The box body is provided with an evaporation chamber and a storage room (101), and an evaporator (110) is installed in the evaporation chamber; A door, connected to the box body, is used to open or close the storage room (101); A duct assembly (200) is located between the evaporation chamber and the storage compartment (101); the duct assembly (200) includes: The air duct front cover (220) faces the storage compartment (101); The rear cover plate (230) of the air duct faces the evaporation chamber and is configured to form an air inlet (202); the rear cover plate (230) of the air duct and the front cover plate (220) of the air duct are fixedly connected and enclosed to form an air duct (201); the air duct (201) is connected to the air inlet (202) and the storage chamber (101) respectively; A fan (210) is located in the air duct (201), and the fan (210) is configured to drive the cold air in the evaporation chamber through the air inlet (202) and the air duct (201) into the storage room (101); Mounting bracket (400), the fan (210) is fixed to the mounting bracket (400); the mounting bracket (400) and the air duct rear cover plate (230) are connected by a snap-fit ​​structure (300), and the snap-fit ​​structure (300) has a supporting rib (310), the supporting rib (310) is located at the radial edge of the fan (210); the supporting rib (310) extends along the airflow direction of the fan (210).

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