Air duct structure and refrigerator

By adopting a two-in-one air duct structure in the refrigerator, the assembly process of the air duct structure is simplified, and the problems of complex and cumbersome assembly of the existing refrigerator air duct structure are solved, thereby achieving smaller assembly space and simpler installation steps.

CN222504588UActive Publication Date: 2025-02-18HEFEI HUALING CO LTD +2
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Patent Information

Application Number
CN202420503218.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-14
Publication Date
2025-02-18
Estimated Expiration
2034-03-14

AI Technical Summary

Technical Problem

The existing refrigerator air duct has a complex structure and a large number of pipelines, resulting in large assembly space and cumbersome installation steps.

Method used

A two-in-one air duct structure is adopted, and the air outlet section is connected through the first air inlet section and the second air inlet section to form an air outlet section, reducing the overall number of pipelines, and connecting the shell structure through plug-in connection Simplify the assembly process.

Benefits of technology

The space and steps required for assembly of the air duct structure are reduced, the simplicity and efficiency of assembly are improved, and the air duct is sealed and the air duct is sealed or air vent or return air is guaranteed.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an air duct structure and refrigerator relates to refrigerator field, the air duct structure includes body, body includes first air inlet section, second air inlet section and air outlet section, the first air inlet section has first air inlet, the second air inlet section has second air inlet, the air outlet section has air outlet, according to the air duct structure, air enters the air duct through the first air inlet of the first air inlet section, air enters the air duct through the second air inlet of the second air inlet section, and meanwhile, the air inlet section and the second air inlet section are communicated with the air outlet section to form the air duct. Air flow in the first air inlet section and air flow in the second air inlet section can flow to the air outlet section at the same time and flow out of the air duct through the air outlet, and therefore the two-in-one air duct structure is formed, the number of overall pipelines of the air duct structure is reduced, the space needed for assembly is reduced, and assembly is easy.
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Description

Technical Field

[0001] The utility model relates to the technical field of refrigerators, in particular to an air duct structure and a refrigerator. Background Art

[0002] With the rapid development of science and technology and the continuous improvement of people's living standards, refrigerators and other household appliances are being used more and more widely in people's daily lives, bringing great convenience to people's daily lives.

[0003] A refrigerator generally has multiple compartments, such as a refrigerator and a freezer. The evaporator of the refrigerator's refrigeration system is generally located on the freezer side and connected to the refrigerator air duct for air supply and return. The air supply method of an air-cooled refrigerator is that cold air is drawn out from the evaporator through the air outlet duct, enters the refrigerator, and after heat exchange is completed, returns to the evaporator through the return air duct.

[0004] In the related art, the evaporator forms a large number of supply and return air pipelines for the supply and return air of different compartments, requires a large installation space, and has many installation steps. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an air duct structure and a refrigerator, forming a two-in-one air duct, reducing the assembly space required for the air duct structure and making the installation simple.

[0006] The utility model also provides a refrigerator with the air duct structure.

[0007] The air duct structure according to the first embodiment of the utility model includes:

[0008] The main body comprises a first air inlet section, a second air inlet section and an air outlet section;

[0009] The first air inlet section has a first air inlet, the second air inlet section has a second air inlet, the air outlet section has an air outlet, and the first air inlet section and the second air inlet section are both connected to the air outlet section to form an air duct.

[0010] The air duct structure according to the embodiment of the utility model has at least the following beneficial effects:

[0011] Air is taken into the air duct through the first air inlet of the first air inlet section, and air is taken into the air duct through the second air inlet of the second air inlet section. At the same time, the airflow in the first air inlet section and the airflow in the second air inlet section can flow to the air outlet section at the same time, and flow out of the air duct through the air outlet, thereby forming a two-in-one air duct structure, forming one air outlet section for multiple air inlet sections, reducing the overall number of pipelines in the air duct structure, reducing the space required for assembly, and simplifying assembly.

[0012] According to some embodiments of the utility model, the main body includes a first shell and a second shell covering each other, the first shell has a first matching portion on a side facing the second shell, the second shell has a second matching portion on a side facing the first shell, and the first matching portion is sealedly connected to the second matching portion.

[0013] According to some embodiments of the present invention, the first mating portion and the second mating portion are plug-connected.

[0014] According to some embodiments of the utility model, in each pair of the first mating portion and the second mating portion that are matingly connected to each other, the first mating portion has a plurality of first assembly grooves, the second mating portion has a plurality of first mating protrusions, and the plurality of first assembly grooves are arranged at intervals, one of the first mating protrusions is inserted in each of the first assembly grooves, and at least one side outer surface of the first mating protrusion abuts against the groove wall of the first assembly groove.

[0015] According to some embodiments of the present invention, in each pair of the first matching portion and the second matching portion that are matched and connected to each other, the first matching portion has a plurality of second matching protrusions, and one second matching protrusion is provided between each two adjacent first assembly grooves;

[0016] The second mating portion has a plurality of second assembly grooves, one of which is provided between every two adjacent first mating protrusions, one of which is inserted into each of the second assembly grooves, and at least one side outer surface of the second mating protrusion abuts against the groove wall of the second assembly groove.

[0017] According to some embodiments of the present invention, in each pair of the first matching portion and the second matching portion that are matched and connected to each other, the first matching portion has three second matching protrusions that are spaced apart, and a first assembly groove is formed between every two second matching protrusions;

[0018] And / or, the second matching portion has three first matching protrusions arranged at intervals, and a second assembly groove is formed between every two of the first matching protrusions.

[0019] According to some embodiments of the present invention, in each pair of the first matching portion and the second matching portion that are matched and connected to each other, the first matching portion has three second matching protrusions that are spaced apart, and a first assembly groove is formed between every two second matching protrusions;

[0020] And / or, the second matching portion has three first matching protrusions arranged at intervals, and a second assembly groove is formed between every two of the first matching protrusions.

[0021] According to some embodiments of the present utility model, the air duct structure further includes a first connecting portion and a second connecting portion;

[0022] The first connection portion is provided on the second shell and is located outside the air duct, and the second connection portion is provided on the first shell and is located outside the air duct;

[0023] The first connecting portion is cooperatively connected with the second connecting portion.

[0024] According to some embodiments of the present invention, an extension direction of the first air inlet section intersects with the air outlet section, and / or an extension direction of the second air inlet section intersects with the air outlet section.

[0025] According to some embodiments of the present utility model, the body further includes a mixing section, and the first air inlet section and the second air inlet section are both connected to the air outlet section through the mixing section;

[0026] The mixed flow section, the second shell forming the first air inlet section, and the second shell forming the second air inlet section are connected into an integrated structure;

[0027] The side of the mixed flow section facing the air outlet section has a third matching portion, and the side of the air outlet section facing the mixed flow section has a fourth matching portion, in each pair of the third matching portions and the fourth matching portions that are matched and connected to each other, the third matching portion has a plurality of third assembly grooves, the fourth matching portion has a plurality of third matching protrusions, and the plurality of third assembly grooves are arranged at intervals, each of the third assembly grooves is inserted with a third matching protrusion, and at least one side of the outer surface of the third matching protrusion abuts against the groove wall of the third assembly groove.

[0028] According to the second aspect of the present invention, the refrigerator comprises a box, a refrigeration system and the air duct structure described in the above embodiment, wherein the refrigeration system comprises an evaporator, and the air duct structure is located outside the box;

[0029] The box body includes a refrigerating chamber and a temperature-changing chamber, the air outlet section is connected to the evaporator through the air outlet, the refrigerating chamber is connected to the first air inlet section through the first air inlet, and the temperature-changing chamber is connected to the second air inlet section through the second air inlet.

[0030] According to some embodiments of the present utility model, the box body includes a rear panel and a first bottom plate, the rear panel and the first bottom plate are intersected and connected, the box body also includes a chassis, the chassis is protruded relative to the first bottom plate and has an assembly space in the chassis, the evaporator is arranged in the assembly space, the first air inlet section and the second air inlet section are arranged on one side of the rear panel, the air outlet section is arranged on one side of the first bottom plate, the air outlet section is arranged in parallel with the chassis and one end is connected to the assembly space;

[0031] The box body includes a first side panel and a front panel, the front panel is opposite to the rear panel, and the first side panel is intersected and connected with the rear panel and the bottom panel;

[0032] The chassis comprises a second side panel and a third side panel, the second side panel and the first side panel face the same side, and the third side panel and the front panel face the same side;

[0033] The air outlet section includes a first air outlet portion and a second air outlet portion which are connected to each other, the first air outlet portion is arranged in parallel with the second side panel, the second air outlet portion is arranged in parallel with the third side panel and one end is connected to the third side panel, and the orthographic projection of the second air outlet portion toward the first bottom panel all falls into the first bottom panel.

[0034] According to some embodiments of the utility model, the refrigeration system includes a condensing module, wherein at least a compressor and a condenser are provided in the condensing module;

[0035] The condensing module is arranged in parallel with the second air outlet and is located on a side of the second air outlet facing the front panel, and the orthographic projection of the condensing module toward the first bottom plate falls entirely into the first bottom plate; and / or,

[0036] The chassis has a second bottom plate, the second bottom plate and the first bottom plate face the same side, the second bottom plate is provided with a drain port, the drain port is communicated with the assembly space, and the second bottom plate is tilted toward one side of the drain port, the box body also includes a drain pipe, the condensation module has an evaporating dish, the condenser transfers heat to the evaporator, and the drain pipe is communicated between the drain port and the evaporating dish.

[0037] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0039] Figure 1 This is a schematic diagram of the back structure of a refrigerator according to an embodiment of the utility model;

[0040] Figure 2 for Figure 1 The front structure diagram of the refrigerator;

[0041] Figure 3 for Figure 1 A schematic structural diagram of the refrigerator from another perspective;

[0042] Figure 4 This is a schematic diagram of the structure of an air duct structure according to an embodiment of the utility model;

[0043] Figure 5 for Figure 4 The first partial structural diagram of the air duct structure in

[0044] Figure 6 for Figure 4 A cross-sectional schematic diagram of the air duct structure in FIG.

[0045] Figure 7 for Figure 4 A schematic structural diagram of the first matching part and the second matching part of the air duct structure in the first embodiment;

[0046] Figure 8 for Figure 4 A schematic structural diagram of the first matching part and the second matching part of the air duct structure in the second embodiment;

[0047] Fig. 9 for Figure 4 A schematic structural diagram of a first matching part and a second matching part of the air duct structure in a third embodiment;

[0048] Fig.10 for Figure 4 A partial enlarged view of the

[0049] Fig.11 for Fig.10 A schematic diagram of the decomposition structure of the first part in FIG.

[0050] Fig.12 for Figure 4 A second partial structural schematic diagram of the air duct structure;

[0051] Fig.13 for Fig.12 A schematic diagram of the decomposition structure of the second part in FIG.

[0052] Fig.14 for Figure 4 A schematic diagram of the first-person perspective structure of the air duct structure and the refrigerator local coordination;

[0053] Fig.15 for Figure 4 A second perspective structural diagram of the air duct structure and the refrigerator local coordination;

[0054] Fig.16 for Figure 1 A schematic diagram of the structure of the evaporator and condensing module layout of the refrigerator;

[0055] Fig.17 for Fig.16 Schematic diagram of the structure of the condensation module.

[0056] Figure Number:

[0057] 100. Refrigerator;

[0058] 10. Box body; 11. Rear panel; 12. First side panel; 13. First bottom panel; 14. Chassis; 141. Second bottom panel; 142. Second side panel; 143. Assembly space; 144. Drain port; 145. Third side panel; 15. Front panel; 16. Refrigerating room; 17. Variable temperature room; 18. Freezing room; 19. Drain pipe;

[0059] 20. Air duct structure; 21. Main body; 21a. First air inlet section; 21b. First air inlet; 21c. Second air inlet section; 21d. Second air inlet; 21e. Air outlet section; 21k. First air outlet; 21n. Second air outlet; 21f. Air outlet; 21g. Mixing section; 21h. Third matching part; 21m. Fourth matching part; 211. First shell; 2111. First matching part; 2111a. First assembly groove; 2111b. Second matching convex part; 212. Second shell; 2121. Second matching part; 2121a. First matching convex part; 2121b. Second assembly groove; 22. Connecting assembly; 221. First connecting part; 223. Second connecting part; 24. Air duct; 30. Evaporator;

[0060] 40. Condensation module; 41. Compressor; 42. Evaporating dish; 43. Condenser; 44. Control panel installation box. DETAILED DESCRIPTION

[0061] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0062] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0063] In the description of the utility model, "a plurality" means more than two. If there is a description of "a first" or "a second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0064] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0065] The present application provides a refrigerator 100, referring to Figures 1 to 3 , including a box body 10, a refrigeration system and an air duct structure 20. The refrigeration system includes but is not limited to conventional components such as a compressor, an evaporator 30, and a condenser. The box body 10 includes at least one refrigeration compartment. The air duct structure 20 is arranged outside the box body 10 and communicates between the refrigeration compartments for supplying or returning air.

[0066] In one embodiment, see Figures 3 to 5 The air duct structure 20 includes a main body 21, the main body 21 includes a first air inlet section 21a, a second air inlet section 21c and an air outlet section 21e, the first air inlet section 21a has a first air inlet 21b, the second air inlet section 21c has a second air inlet 21d, the air outlet section 21e has an air outlet 21f, and the first air inlet section 21a and the second air inlet section 21c are both connected to the air outlet section 21e to form an air duct 24.

[0067] Specifically, the first air inlet section 21a takes in air through the first air inlet 21b, and the second air inlet section 21c takes in air through the second air inlet 21d, so that the air duct structure 20 of the present application forms a double air inlet. At the same time, the airflow entering the first air inlet section 21a and the airflow entering the second air inlet section 21c flow into the air outlet section 21e together, and are discharged together through the air outlet 21f along the air outlet section 21e, thereby completing the complete air supply process of the main body 21.

[0068] In this way, the present application forms a double-inlet air inlet (respectively the first air inlet 21b and the second air inlet 21d) and a single outlet air outlet (air outlet 21f) structure through the connection setting of the first air inlet section 21a, the second air inlet section 21c and the air outlet section 21e, forming a two-in-one air inlet and outlet duct structure 20 for air supply, reducing the overall number of pipelines of the air duct structure 20, thereby reducing the space required for the assembly of the air duct structure 20, and simplifying the assembly.

[0069] It can be understood that when the main body 21 also includes other air inlet sections such as the third air inlet section, the third air inlet section can also be connected to the air outlet section 21e, thereby forming a three-in-one air duct structure 20 of air inlet and outlet.

[0070] In one embodiment, see Figure 6The main body 21 includes a first shell 211 and a second shell 212. The second shell 212 and the first shell 211 cover each other and define an air duct 24. The first shell 211 has a first matching portion 2111 on the side facing the second shell 212, and the second shell 212 has a second matching portion 2121 on the side facing the first shell 211. The second matching portion 2121 is sealed and connected to the first matching portion 2111.

[0071] In some embodiments, the second shell 212 and the first shell 211 cover each other, and the second shell 212 and the first shell 211 jointly define the air duct 24 of the body 21 for ventilation. The first shell 211 can be a hollow structure with one end open, and the second shell 212 can be a plate-like structure. The second shell 212 covers the open side of the first shell 211, so that the second shell 212 and the first shell 211 jointly define the air duct 24. The second shell 212 and the first shell 211 can also be hollow structures with one side open, and the open side of the second shell 212 covers the open side of the first shell 211. Of course, the body 21 formed by the first shell 211 and the second shell 212 can be a variety of shapes, such as a cylinder, a cuboid, etc.

[0072] By docking the first shell 211 and the second shell 212, the air duct 24 of the main body 21 is formed through later assembly. When the air duct structure 20 is injection molded, two separate mold injection half shells of the first shell 211 and the second shell 212 can be formed, thereby avoiding direct injection molding of the main body 21, thereby reducing the manufacturing difficulty of the air duct structure 20.

[0073] Furthermore, one or more first matching parts 2111 may be formed on the side of the first shell 211 facing the second shell 212. Similarly, one or more second matching parts 2121 may be formed on the side of the second shell 212 facing the first shell 211. The first matching parts 2111 and the second matching parts 2121 may be connected in a one-to-one matching manner. For example, the first shell 211 may be provided with a first matching part 2111 on each of the two opposite sides of its opening, and the second shell 212 may be provided with a second matching part 2121 on each of the two opposite sides of its opening, thereby forming a sealed connection between two pairs of first matching parts 2111 and second matching parts 2121 to ensure the airtightness of the air duct 24.

[0074] It can be understood that the first air inlet section 21a is formed by covering the first shell 211 and the second shell 212. Similarly, the second air inlet section 21c is formed by covering the first shell 211 and the second shell 212. Similarly, the air outlet section 21e is formed by covering the first shell 211 and the second shell 212. In some embodiments, the first shell 211 forming the first air inlet section 21a, the first shell 211 forming the second air inlet section 21c, and the first shell 211 forming the air outlet section 21e can be an integral structure or can be assembled and connected later. It should be noted that if the three are assembled and connected later, it is necessary to ensure the sealing of the assembly between the first shell 211 and the first shell 211. The same is true for the second shell 212, which will not be repeated here.

[0075] In one embodiment, the first mating portion 2111 and the second mating portion 2121 are plug-connected. In other words, a partial structure of one of the first mating portion 2111 and the second mating portion 2121 will be inserted into the other, thereby achieving a physical connection between the first shell 211 and the second shell 212. The connection is simple and fast and can achieve rapid assembly and disassembly between the first shell 211 and the second shell 212.

[0076] At the same time, after the first matching portion 2111 and the second matching portion 2121 are plugged and connected, the connection between the first matching portion 2111 and the second matching portion 2121 is sealed, which can prevent gas from flowing from the connection, so that the main body 21 can transport gas through the air duct 24.

[0077] In one embodiment, the second matching portion 2121 is matched and connected with the first matching portion 2111 one by one to form one or more pairs of first matching portions 2111 and second matching portions 2121 that are matched and connected to each other, so as to fix the second shell 212 and the first shell 211. It should be noted that, hereinafter, the restrictions on the first matching portion 2111 and the second matching portion 2121 refer to the first matching portion 2111 or the second matching portion 2121 in each pair of the first matching portion 2111 and the second matching portion 2121 that match each other.

[0078] Also, see Figure 6 to Figure 7 In each pair of mutually matingly connected first mating portions 2111 and second mating portions 2121, the first mating portion 2111 has a plurality of first assembly grooves 2111a, the second mating portion 2121 has a plurality of first mating protrusions 2121a, and the plurality of first assembly grooves 2111a are arranged at intervals, a first mating protrusion 2121a is inserted in each first assembly groove 2111a, and at least one side outer surface of the first mating protrusion 2121a is in contact with the groove wall of the first assembly groove 2111a.

[0079] Specifically, the first mating portion 2111 has a plurality of first assembly grooves 2111a, which means that there are a plurality of grooves or openings on the first mating portion 2111, and these grooves or openings are referred to as first assembly grooves 2111a; the second mating portion 2121 has a plurality of first mating protrusions, which means that there are a plurality of protruding parts or structures on the second mating portion 2121, and these protruding parts or structures are referred to as first mating protrusions 2121a; each first mating protrusion 2121a is inserted into a first assembly groove 2111a, thereby forming a plug-in or snap-fitting connection between the second mating portion 2121 and the first mating portion 2111.

[0080] In the process of covering the second shell 212 and the first shell 211 with each other, the first matching portion 2111 and the second matching portion 2121 are opposite to each other, and each first assembly groove 2111a is aligned with a first matching protrusion 2121a for plugging, so that the second shell 212 and the first shell 211 are close to each other, so that each first matching protrusion 2121a is inserted into a first assembly groove 2111a, and at least one side of the outer surface of the first matching protrusion 2121a abuts against the groove wall of the first assembly groove 2111a to complete the assembly, and the assembly of each pair of first matching portions 2111 and second matching portions 2121 is completed.

[0081] The shapes and sizes of the first assembly grooves 2111a and the first matching protrusions 2121a need to be matched to ensure that each first assembly groove 2111a can fully accommodate one first matching protrusion 2121a.

[0082] Further, the entire groove wall of each first assembly groove 2111a forms a first abutment surface, and the entire outer surface of each first mating protrusion 2121a forms a second abutment surface, and the second abutment surface includes one or more outer surfaces, such as the second abutment surface may include a closed conical surface, in which case the first mating protrusion 2121a is conical, and the second abutment surface may include a closed circular curved surface and a circular end face, in which case the first mating protrusion 2121a is cylindrical, such as the second abutment surface may include a plurality of end-to-end connected side faces and a polygonal end face, and each two side faces are connected at an angle, in which case the first mating protrusion 2121a is a polygonal column. When the first shell 211 and the second shell 212 are spliced ​​together, at least one side outer surface of the first abutting surface abuts against the second abutting surface, thereby ensuring the assembly effectiveness of the first mating protrusion 2121a and the first assembly groove 2111a, avoiding the airflow in the air duct 24 from leaking to the outside from between the first mating protrusion 2121a and the first assembly groove 2111a, and ensuring the closed connection between the first shell 211 and the second shell 212.

[0083] In some specific embodiments, the number of first assembly grooves 2111a may include two, three, etc., and similarly, the number of first mating protrusions 2121a may include two, three, etc., thereby forming multiple plug-in fits at the connection positions of each pair of mutually mating second mating portions 2121 and first mating portions 2111, thereby increasing the sealing area and the sealing effect, so that the structural sealing of the air duct structure 20 is better and no flash gaps will appear, thereby ensuring the airtightness of the air duct 24 of the main body 21 for air outlet or return.

[0084] In one embodiment, see Figure 7 In each pair of mutually matingly connected first mating portions 2111 and second mating portions 2121, the first mating portion 2111 has a plurality of second mating protrusions 2111b, a second mating protrusion 2111b is provided between each two adjacent first assembly grooves 2111a, and the second mating portion 2121 has a plurality of second assembly grooves 2121b, a second assembly groove 2121b is provided between each two adjacent first mating protrusions 2121a, a second mating protrusion 2111b is inserted in each second assembly groove 2121b, and at least one side outer surface of the second mating protrusion 2111b abuts against the groove wall of the second assembly groove 2121b.

[0085] Similarly, the first mating portion 2111 has a plurality of second mating protrusions 2111b, which means that a protruding portion or structure is formed between each adjacent two first assembly grooves 2111a on the second mating portion 2121, and these protruding portions or structures are called second mating protrusions 2111b; the second mating portion 2121 has a plurality of second assembly grooves 2121b, which means that a groove or opening is formed between each adjacent two second mating protrusions 2111b on the second mating portion 2121, and these grooves or openings are called second assembly grooves 2121b. Each second mating protrusion 2111b is inserted into a second assembly groove 2121b, thereby forming a plug-in or snap-fitting connection between the second mating portion 2121 and the first mating portion 2111.

[0086] Specifically, in the process of covering the second shell 212 and the first shell 211 with each other, the first matching portion 2111 and the second matching portion 2121 are aligned with each other, each first assembly groove 2111a is aligned with a first matching protrusion 2121a, and each second matching protrusion 2111b is aligned with a second assembly groove 2121b for plugging, so that the second shell 212 and the first shell 211 are close to each other, so that each first matching protrusion 2121a is accurately inserted into a first assembly groove 2111a, and each second matching protrusion 2111b is accurately inserted into the second assembly groove 2121b, at least one side of the outer surface of the first matching protrusion 2121a abuts against the groove wall of the first assembly groove 2111a, and at least one side of the outer surface of the second matching protrusion 2111b abuts against the groove wall of the second assembly groove 2121b, and the assembly is completed.

[0087] The shapes and sizes of the second assembly grooves 2121b and the second matching protrusions 2111b need to be matched to ensure that each second assembly groove 2121b can fully accommodate a second matching protrusion 2111b.

[0088] Furthermore, the entire groove wall of each second assembly groove 2121b forms a third abutment surface, and the entire outer surface of each second mating protrusion 2111b forms a fourth abutment surface. The fourth abutment surface includes one or more outer surfaces. For example, the fourth abutment surface may include a closed conical surface. In this case, the second mating protrusion 2111b is conical. The fourth abutment surface may include a closed circular curved surface and a circular end face. In this case, the second mating protrusion 2111b is cylindrical. For example, the fourth abutment surface may include a plurality of end-to-end connected side faces and a polygonal end face, and each two side faces are connected at an angle. In this case, the second mating protrusion 2111b is a polygonal column. When the first shell 211 and the second shell 212 are spliced ​​together, at least one side outer surface of the third abutting surface abuts against the second abutting surface, thereby ensuring the assembly effectiveness of the second mating protrusion 2111b and the second assembly groove 2121b, avoiding the airflow in the air duct 24 from leaking to the outside from between the second mating protrusion 2111b and the second assembly groove 2121b, and ensuring the closed connection between the first shell 211 and the second shell 212.

[0089] In this way, the present application further increases the sealing area and enhances the sealing effect of the main body 21 by inserting the second matching portion 2121 and the first matching portion 2111 into each other.

[0090] In some specific embodiments, all outer surfaces of the first mating protrusion 2121a abut against the groove wall of the first assembly groove 2111a, and / or all outer surfaces of the second mating protrusion 2111b abut against the groove wall of the second assembly groove 2121b.

[0091] The number of the first mating protrusion 2121a and the second mating protrusion 2111b may be the same or different, the size of the first mating protrusion 2121a and the second mating protrusion 2111b may be the same or different, the outermost sides of the second mating portion 2121 may both be the first mating protrusion 2121a, in which case the outermost sides of the first mating portion 2111 are both the second assembly groove 2121b. Similarly, the outermost sides of the second mating portion 2121 may be the first mating protrusion 2121a on one side and the first assembly groove 2111a on the other side, in which case the outermost sides of the first mating portion 2111 are the first assembly groove 2111a and the first mating protrusion 2121a, respectively.

[0092] In one specific embodiment, see Figure 7 In each pair of mutually matched first matching parts 2111 and second matching parts 2121, the first matching part 2111 has three second matching protrusions 2111b arranged at intervals, and a first assembly groove 2111a is formed between every two second matching protrusions 2111b. In this case, the first matching part 2111 forms an arrangement of the second matching protrusion 2111b, the first assembly groove 2111a, the second matching protrusion 2111b, the first assembly groove 2111a, and the second matching protrusion 2111b. The second matching part 2121 can also form three intervals. The first mating protrusions 2121a are arranged at intervals, and a second assembly groove 2121b is formed between every two first mating protrusions 2121a. At this time, the second mating portion 2121 forms an arrangement of the first mating protrusion 2121a, the second assembly groove 2121b, the first mating protrusion 2121a, the second assembly groove 2121b, and the second mating protrusion 2111b. After the second mating portion 2121 and the first mating portion 2111 are mated and connected, the first mating protrusion 2121a and the second mating protrusion 2111b are located on the outermost sides respectively.

[0093] In other embodiments, Figures 8 to 9 In each pair of mutually matingly connected first mating portions 2111 and second mating portions 2121, the first mating portion 2111 may also have two second mating protrusions 2111b spaced apart and two first assembly grooves 2111a spaced apart, wherein one first assembly groove 2111a is located between the two second mating protrusions 2111b spaced apart, wherein the other first assembly groove 2111a is located on the side of one second mating protrusion 2111b away from the other second mating protrusion 2111b. The second mating portion 2121 forms three first mating protrusions 2121a spaced apart, and a second assembly groove 2121b is formed between every two first mating protrusions 2121a. At this time, the first mating portion 2111 forms an arrangement of the first assembly groove 2111a, the second mating protrusion 2111b, the first assembly groove 2111a, and the second mating protrusion 2111b.

[0094] Alternatively, the first mating portion 2111 may also have two second mating protrusions 2111b arranged at intervals and three first assembly grooves 2111a arranged at intervals, with one second mating protrusion 2111b between every two first assembly grooves 2111a. In this case, the first mating portion 2111 forms an arrangement of the first assembly groove 2111a, the second mating protrusion 2111b, the first assembly groove 2111a, the second mating protrusion 2111b, and the first assembly groove 2111a.

[0095] It can be understood that the second mating portion 2111 can also be formed into an arrangement of the second assembly groove 2121b, the first mating protrusion 2121a, the second assembly groove 2121b, and the second mating protrusion 2111b, or an arrangement of the second assembly groove 2121b, the first mating protrusion 2121a, the second assembly groove 2121b, the second mating protrusion 2111b, and the second assembly groove 2121b. In the above-mentioned mating methods, the overall structure of the first mating portion 2111 and the second mating protrusion 2111b is simple and small in size, so that the first mating portion 2111 and the second mating portion 2121 do not occupy too much space after assembly.

[0096] In some embodiments, Figure 4 and Fig.10 The air duct structure 20 includes a connecting component 22, and the connecting component 22 includes a first connecting portion 221 and a second connecting portion 223. The first connecting portion 221 is disposed in the second shell 212 and is located outside the air duct 24. The second connecting portion 223 is disposed in the first shell 211 and is located outside the air duct 24. The first connecting portion 221 and the second connecting portion 223 are cooperatively connected.

[0097] It can be understood that the first connecting portion 221 and the second connecting portion 223 are themselves arranged outside the air duct 24, which does not affect the formation of the air duct 24 in the main body 21 and the covering of the first shell 211 and the second shell 212. However, after the second matching portion 2121 and the first matching portion 2111 are matched, in order to ensure the connection stability of the first shell 211 and the second shell 212, the first shell 211 and the second shell 212 are fixed in position again from the outside of the air duct 24, so that the first shell 211 and the second shell 212 are fixedly connected.

[0098] Specifically, the connection method between the first connection part 221 and the second connection part 223 can be any form of snap connection, threaded fixed connection, clamping, plug-in, etc. In one example, the first connection part 221 can be a convex part on the first shell 211 that protrudes outward from the air duct 24, and the second connection part 223 can be a hollow clamping ring formed on the convex part of the second shell 212 that protrudes outward from the air duct 24. The clamping ring is sleeved on the convex structure to fix the first shell 211 and the second shell 212 to be fixedly connected. In another embodiment, the first connection part 221 and the second connection part 223 are both mounting holes provided outside the air duct 24, and a special structure connected by external bolts, rivets, etc. passes through the mounting holes and is fixedly connected, thereby realizing the matching connection between the first connection part 221 and the second connection part 223.

[0099] The first connection part 221 may include multiple, and the second connection part 223 may also include multiple. It should be noted that the first connection part 221 and the second connection part 223 need to be matched and exist at the same time, and multiple first connection parts 221 can be set at multiple positions of the main body 21 to evenly apply the tightening effect.

[0100] In one of the embodiments, please refer to Figures 4 to 5 and Figures 10 to 13 The extension direction of the first air inlet section 21a intersects with the air outlet section 21e, and / or the extension direction of the second air inlet section 21c intersects with the air outlet section 21e.

[0101] Specifically, the extension direction of the first air inlet section 21a intersects with the air outlet section 21e, which means that a bend is formed between the first air inlet section 21a and the air outlet section 21e, thereby reducing the length of the body 21 in a certain direction, reducing the linear dimension of the body 21, and reducing the size of the linear dimension of the required assembly space. Similarly, the extension direction of the second air inlet section 21c intersects with the extension direction of the air outlet section 21e, which means that a bend is formed between the second air inlet section 21c and the air outlet section 21e, thereby reducing the length of the body 21 in a certain direction, reducing the linear dimension of the body 21, and reducing the size of the linear dimension of the required assembly space.

[0102] In a specific embodiment, the first air inlet section 21a and the second air inlet section 21c may form a V-shaped connection structure, see Figure 4 and Fig.11 The main body 21 also includes a mixing section 21g, the mixing section 21g, the second shell 212 forming the first air inlet section 21a, and the second shell 212 forming the second air inlet section 21c are connected as an integrated structure, and the first air inlet section 21a and the second air inlet section 21c are both connected to the air outlet section 21e through the mixing section 21g.

[0103] See also Figure 5 and Fig.11 and Fig.12The side of the mixing section 21g facing the air outlet section 21e has a third matching portion 21h, and the side of the air outlet section 21e facing the mixing section 21g has a fourth matching portion 21m. Each pair of third matching portions 21h and fourth matching portions 21m that are matched and connected to each other, the third matching portion 21h has a plurality of third assembly grooves, the fourth matching portion 21m has a plurality of third matching protrusions, and the plurality of third assembly grooves are arranged at intervals, a third matching protrusion is inserted in each third assembly groove, and at least one side of the outer surface of the third matching protrusion is in contact with the third assembly groove.

[0104] Specifically, the mixing section 21g is connected to the second shell 212 forming the first air inlet section 21a and the second shell 212 forming the second air inlet section 21c as an integrated structure. At this time, a part of the second shell 212 forming the first air inlet section 21a, a part of the second shell 212 forming the second air inlet section 21c, and the mixing section 21g can be arranged by integral injection molding to ensure the sealing effect between the first air inlet section 21a and the mixing section 21g, as well as the sealing effect between the second air inlet section 21c and the mixing section 21g.

[0105] The second shell 212 forming the first air inlet section 21a is connected to the air outlet section 21e through the mixing section 21g. Similarly, the second shell 212 forming the second air inlet section 21c is connected to the air outlet section 21e through the mixing section 21g. That is, the connection between the first air inlet section 21a and the second air inlet section 21c and the air outlet section 21e is realized through the mixing section 21g. Therefore, a sealed connection needs to be ensured at the connecting position between the mixing section 21g and the air outlet section 21e to ensure the overall sealing of the main body 21.

[0106] For the specific matching method of the third assembly groove and the third matching protrusion, please refer to the specific description of the first assembly groove 2111a and the first matching protrusion 2121a above, which will not be repeated here. Further, a fourth matching protrusion may be provided between each two adjacent third assembly grooves, and a fourth assembly groove may be provided between each two adjacent third matching protrusions. For the matching method of the fourth assembly groove and the fourth matching protrusion, please refer to the specific description of the second assembly groove 2121b and the second matching protrusion 2111b above.

[0107] It can be understood that the mixing section 21g is a hollow structure that is sealed on all sides and open at both ends, one end of which forms a connection with the first air inlet section 21a and the second air inlet section 21c, and the other end forms a circumferentially arranged third matching portion 21h. The fourth matching portion 21m is simultaneously arranged on the side of the first shell 211 and the second shell 212 of the air outlet section 21e facing the mixing section 21g, so as to cooperate with the third matching portion 21h of the mixing section 21g to form a circumferential seal.

[0108] According to another aspect of the present application, a refrigerator 100 is also provided. The body 10 of the refrigerator 100 includes a refrigerating chamber 16 and a variable temperature chamber 17. The air duct structure 20 is located outside the body 10 and forms an air duct 24 between the evaporator 30 and the refrigerating chamber 16, and between the evaporator 30 and the variable temperature chamber 17. Specifically, the refrigerating chamber 16 is generally used to refrigerate food, and the variable temperature chamber 17 is used to provide flexible temperature control to meet the storage temperature requirements of different foods. The temperature of the variable temperature chamber 17 can be adjusted, usually between -18°C and 6°C. The evaporator 30 is used to supply air to the refrigerating chamber 16 and the variable temperature chamber 17, and return air through the air duct 24 of the air duct structure 20.

[0109] Specifically, the first air inlet section 21a is connected to the refrigerating chamber 16 through the first air inlet 21b, the second air inlet section 21c is connected to the variable temperature chamber 17 through the second air inlet 21d, and the air outlet section 21e is connected to the evaporator 30 through the air outlet 21f, thereby realizing the return air of the evaporator 30 to the refrigerating chamber 16 and the variable temperature chamber 17, and the return air of the refrigerating chamber 16 and the variable temperature chamber 17 are two-in-one. For the refrigerator 100 with a large number of refrigeration compartments, the number of pipelines is reduced, thereby reducing the installation steps.

[0110] In one embodiment, see Figures 1 to 3 and Figure 14 to Figure 15 The box body 10 includes a rear panel 11 and a first bottom plate 13, the rear panel 11 and the first bottom plate 13 are intersected and connected in pairs, and the box body 10 also includes a bottom plate 14, the bottom plate 14 is protruded relative to the first bottom plate 13 and has an assembly space 143 inside, and the evaporator 30 is arranged in the assembly space 143. The first air inlet section 21a and the second air inlet section 21c are arranged on one side of the rear panel 11, and the air outlet section 21e is arranged on one side of the first bottom plate 13, and the air outlet section 21e is arranged in parallel with the bottom plate 14 and one end of the air outlet section 21e is connected to the assembly space 143.

[0111] When the refrigerator 100 is placed on the ground, the bottom plate 14 forms the position of the box body 10 closest to the ground, the first bottom plate 13 faces the ground and forms a gap with the ground, and the height of the gap is determined by the height of the bottom plate 14. It can be understood that, generally, the refrigeration compartment also includes a freezer compartment 18. Generally, the box body 10 of the refrigerator 100 forms a refrigerating chamber 16, a temperature-changing chamber 17, and a freezer compartment 18 from top to bottom, the first bottom plate 13 forms the bottom of the freezer compartment 18, and the bottom plate 14 is located below the freezer compartment 18, so that the evaporator 30 is placed at the bottom of the freezer compartment 18.

[0112] The first air inlet section 21a and the second air inlet section 21c are rearwardly arranged on one side of the rear panel 11 of the housing 10, that is, when the user stands directly in front of the refrigerator 100, the first air inlet section 21a and the second air inlet section 21c are located on the side of the housing 10 away from the user, and then, the main body 21 goes around from one side of the rear panel 11 to the bottom and is arranged in parallel with the chassis 14, that is, the air outlet section 21e is located on the side of the first bottom plate 13 facing the ground and is arranged in parallel with the chassis 14 in the left and right directions of the human body, and then is connected to the chassis 14, and returns air to the assembly space 143 through the air outlet 21f, so as to form an air duct structure 20 from the rear side of the housing 10 to the bottom of the housing 10 for the bottom-mounted evaporator 30, and does not occupy other space.

[0113] In one embodiment, see Figures 1 to 3 and Figures 14 to 16 The box body 10 also includes a front panel 15 and a first side panel 12. The front panel 15 is opposite to the rear panel 11. The first side panel 12, the rear panel 11 and the first bottom panel 13 are intersected and connected in pairs. When a user stands in front of the refrigerator 100, his face faces the front panel 15, and the first side panel 12 is located on the right hand side or left and right sides of the user standing in front of the refrigerator 100.

[0114] The chassis 14 includes a second side panel 142 and a third side panel 145. The second side panel 142 and the first side panel 12 face the same side, and the third side panel 145 and the front panel 15 face the same side. The air outlet section 21e includes a first air outlet portion 21k and a second air outlet portion 21n that are connected to each other. The first air outlet portion 21k is arranged in parallel with the second side panel 142, and the second air outlet portion 21n is arranged in parallel with the third side panel 145 and one end is connected to the third side panel 145. The orthographic projection of the second air outlet portion 21n toward the first bottom plate 13 falls entirely into the first bottom plate 13.

[0115] With the front panel 15 facing the human body as a reference, the first air outlet 21k is arranged in parallel with the second side panel 142 along the left and right direction of the human body, that is, the first air outlet 21k is arranged on the side of the chassis 14. At this time, the positive projection of the first air outlet 21k toward the first bottom plate 13 can fall completely into the first bottom plate 13, or be partially located inside the first bottom plate 13 and partially located outside the first bottom plate 13, so that the second air outlet 21n is arranged from one side of the first side panel 12 to the outside of the second side panel 142.

[0116] The connecting position of the first air outlet 21k and the second air outlet 21n forms a bend, and the second air outlet 21n is arranged in parallel with the third side panel 145 along the front-to-back direction of the human body and is located on the side of the third side panel 145 close to the human body, that is, the second air outlet 21n is arranged at the front of the chassis 14 so as to be connected with the assembly space 143 in the chassis 14 from the front of the refrigerator, and finally forms an air duct structure 20 which goes around from the rear side of the box body 10 to the side of the chassis 14 and then around the front side of the chassis 14. It can be understood that in one specific embodiment, the air outlet section 21e can extend in a J shape as a whole.

[0117] Moreover, the orthographic projection of the second air outlet 21n toward the first bottom plate 13 falls entirely into the first bottom plate 13. At this time, the second air outlet 21n is entirely hidden at the bottom of the first bottom plate 13 of the box body 10, and no part protrudes from one side of the front panel 15, thereby ensuring the aesthetic appearance of the refrigerator box body 10 without affecting the user's use of the refrigerator box body 10.

[0118] In one embodiment, the chassis 14 also includes a second bottom plate 141, which faces the same side as the first bottom plate 13. When the refrigerator 100 is placed on the ground, the second bottom plate 141 is closer to the ground than the first bottom plate 13. The second side panel 142 and the front panel 15 both face the user standing directly in front of them, and the second side panel 142 and the third side panel 145 are located near the feet. It can be understood that the chassis 14 can also include other side panels such as a fourth side panel, etc. in addition to the second side panel 142 and the third side panel 145. All the side panels are connected end to end and define an assembly space 143 together with the second bottom plate 141. The air outlet section 21e on one side of the chassis 14 extends to the bottom of the box body 10, and extends from the side parallel to the second side panel 142 to the side parallel to the third side panel 145 and is connected to the third side panel 145, thereby connecting the refrigerating chamber 16 with the evaporator 30 at the bottom of the box body 10 and the variable temperature chamber 17 with the evaporator 30 at the bottom of the box body 10, forming a refrigerator with a duct structure 20 that goes from the rear side to the bottom and then returns air from the front side of the freezer chamber 18.

[0119] In one embodiment, see Fig.14 The second bottom plate 141 is provided with a drain port 144, which is connected to the assembly space 143. The second bottom plate 141 is inclined toward one side of the drain port 144. After the air outlet section 21e returns air and carries part of the water into the assembly space 143, the water entering the assembly space 143 can flow to the drain port 144 under the inclined guiding effect of the second bottom plate 141 and be discharged out of the box body 10, thereby effectively draining the water in the air duct structure 20.

[0120] In one specific embodiment, see Fig.14The second bottom plate 141 can form a drainage angle a with a horizontal plane (such as the ground), and the horizontal plane is perpendicular to the direction of gravity, so that the water on the second bottom plate 141 can be drained smoothly.

[0121] Specifically, the drainage angle a satisfies a range of greater than or equal to 5 degrees and less than or equal to 35 degrees, and optionally, can be 7 degrees, so as to effectively drain the water in the assembly space 143 .

[0122] In one embodiment, see Figure 16 to Figure 17 The refrigeration system includes a condensing module 40, in which at least a compressor 41 and a condenser 42 are provided. The connection relationship between the compressor 41 and the condenser 42 and the evaporator 30 is the same as that of a conventional refrigeration system, which will not be repeated here.

[0123] In addition, the condensing module 40 is arranged in parallel with the second air outlet 21n and is located on the side of the second air outlet 21n facing the front panel 15. At this time, with the human body facing the front panel 15 as a reference, the second air outlet 21n and the condensing module 40 are sequentially provided on the side of the third side panel 145 close to the human body. In other words, in the direction from the front panel 15 to the rear panel 11, the third side panel 145, the second air outlet 21n and the condensing module 40 are arranged in parallel. At this time, the evaporator 30 is placed at the bottom of the box body 10 and is located at the rear side of the bottom of the box body 10. The condensing module 40 is placed at the bottom of the box body 10 and is located at the front side of the bottom of the box body 10. The condensing module 40 and the chassis 14 are arranged one after the other in the direction from the front panel 15 to the rear panel 11, thereby making full use of the bottom space of the box body 10, and the compressor 41 and the condenser 42 can use the bottom space of the box body 10 for rapid heat dissipation.

[0124] The orthographic projection of the condensing module 40 toward the first bottom plate 13 falls entirely into the first bottom plate 13. At this time, the condensing module 40 is completely hidden at the bottom of the first bottom plate 13 of the cabinet 10, and no part protrudes from one side of the front panel 15, thereby ensuring the aesthetic appearance of the refrigerator cabinet 10 without affecting the user's use of the refrigerator cabinet 10.

[0125] In one embodiment, the housing 10 further includes a drain pipe 19, the condensation module 40 has an evaporating dish 43, the condenser 42 transfers heat to the evaporating dish 43, the drain pipe 19 is connected between the drain port 144 and the evaporating dish 43, and the water discharged from the assembly space 143 through the drain port 144 on the second bottom plate 141 enters the evaporating dish 43 in the condensation module 40 through the drain pipe 19. It can be understood that the condenser 42 includes a condensing fan. During the condensation process of the condenser 42, heat is discharged through the condensing fan and the water in the evaporating dish 43 is evaporated, thereby processing the accumulated water in the evaporating dish 43.

[0126] In one embodiment, see Fig.17The condensing module 40 further includes a control panel installation box 44, and the control panel installation box 44 is used to install the control main board of the refrigerator 100, so that the condensing module 40 has the functions of refrigeration, installation and treatment of accumulated water.

[0127] According to another aspect of the present application, see Figure 4 , and also provides an air duct structure 20 in any of the above embodiments, forming an air duct structure 20 with two-in-one air inlet and outlet, and improving the sealing of the air duct 24 to ensure the airtightness of the air outlet or return air. Its specific structure and assembly process have been described in detail above, and will not be repeated here.

[0128] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Air duct structure, characterized in that: include: The main body comprises a first air inlet section, a second air inlet section and an air outlet section; The first air inlet section has a first air inlet, the second air inlet section has a second air inlet, the air outlet section has an air outlet, and the first air inlet section and the second air inlet section are both connected to the air outlet section to form an air duct.

2. The air duct structure according to claim 1, characterized in that: The body comprises a first shell and a second shell covering each other, the first shell has a first matching portion on a side facing the second shell, the second shell has a second matching portion on a side facing the first shell, and the first matching portion is sealedly connected to the second matching portion.

3. The air duct structure according to claim 2, characterized in that: The first matching portion and the second matching portion are plug-connected.

4. The air duct structure according to claim 3, characterized in that: In each pair of the first mating parts and the second mating parts that are matingly connected to each other, the first mating parts have a plurality of first assembly grooves, the second mating parts have a plurality of first mating protrusions, and the plurality of first assembly grooves are arranged at intervals, one of the first mating protrusions is inserted in each of the first assembly grooves, and at least one side outer surface of the first mating protrusion abuts against the groove wall of the first assembly groove.

5. The air duct structure according to claim 4, characterized in that: In each pair of the first matching portion and the second matching portion that are matched and connected to each other, the first matching portion has a plurality of second matching protrusions, and one second matching protrusion is provided between each two adjacent first assembly grooves; The second mating portion has a plurality of second assembly grooves, one of which is provided between every two adjacent first mating protrusions, one of which is inserted into each of the second assembly grooves, and at least one side outer surface of the second mating protrusion abuts against the groove wall of the second assembly groove.

6. The air duct structure according to claim 5, characterized in that: In each pair of the first matching portion and the second matching portion that are matched and connected to each other, the first matching portion has three second matching protrusions that are arranged at intervals, and one first assembly groove is formed between every two second matching protrusions; And / or, the second matching portion has three first matching protrusions arranged at intervals, and a second assembly groove is formed between every two of the first matching protrusions.

7. The air duct structure according to claim 2, characterized in that: The air duct structure also includes a first connecting portion and a second connecting portion; The first connection portion is provided on the second shell and is located outside the air duct, and the second connection portion is provided on the first shell and is located outside the air duct; The first connecting portion is cooperatively connected with the second connecting portion.

8. The air duct structure according to claim 2, characterized in that: An extension direction of the first air inlet section intersects with the air outlet section, and / or an extension direction of the second air inlet section intersects with the air outlet section.

9. The air duct structure according to claim 8, characterized in that: The main body further includes a mixing section, and the first air inlet section and the second air inlet section are both connected to the air outlet section through the mixing section; The mixed flow section, the second shell forming the first air inlet section, and the second shell forming the second air inlet section are connected into an integrated structure; The side of the mixed flow section facing the air outlet section has a third matching portion, and the side of the air outlet section facing the mixed flow section has a fourth matching portion, in each pair of the third matching portions and the fourth matching portions that are matched and connected to each other, the third matching portion has a plurality of third assembly grooves, the fourth matching portion has a plurality of third matching protrusions, and the plurality of third assembly grooves are arranged at intervals, each of the third assembly grooves is inserted with a third matching protrusion, and at least one side of the outer surface of the third matching protrusion abuts against the groove wall of the third assembly groove.

10. A refrigerator, characterized in that It comprises a box body, a refrigeration system and the air duct structure according to any one of claims 1 to 9; The refrigeration system includes an evaporator, and the air duct structure is located outside the box; The box body includes a refrigerating chamber and a temperature-changing chamber, the air outlet section is connected to the evaporator through the air outlet, the refrigerating chamber is connected to the first air inlet section through the first air inlet, and the temperature-changing chamber is connected to the second air inlet section through the second air inlet.

11. The refrigerator according to claim 10, characterized in that: The box body includes a rear panel and a first bottom plate, the rear panel is intersected and connected with the first bottom plate, the box body also includes a bottom plate, the bottom plate is protruded relative to the first bottom plate and has an assembly space in the bottom plate, and the evaporator is arranged in the assembly space; The first air inlet section and the second air inlet section are arranged on one side of the rear panel, the air outlet section is arranged on one side of the first bottom plate, the air outlet section is arranged in parallel with the chassis and one end of the air outlet section is connected to the assembly space; The box body includes a first side panel and a front panel, the front panel is opposite to the rear panel, and the first side panel is intersected and connected with the rear panel and the bottom panel; The chassis comprises a second side panel and a third side panel, the second side panel and the first side panel face the same side, and the third side panel and the front panel face the same side; The air outlet section includes a first air outlet portion and a second air outlet portion that are connected to each other, the first air outlet portion is arranged in parallel with the second side panel, the second air outlet portion is arranged in parallel with the third side panel and one end is connected to the third side panel, and the orthographic projection of the second air outlet portion toward the first bottom panel all falls into the first bottom panel.

12. The refrigerator according to claim 11, characterized in that: The refrigeration system comprises a condensing module, wherein the condensing module is provided with at least a compressor and a condenser; The condensing module is arranged in parallel with the second air outlet and is located on a side of the second air outlet facing the front panel, and the orthographic projection of the condensing module toward the first bottom plate falls entirely into the first bottom plate; and / or, The chassis has a second bottom plate, the second bottom plate and the first bottom plate face the same side, the second bottom plate is provided with a drain port, the drain port is communicated with the assembly space, and the second bottom plate is tilted toward one side of the drain port, the box body also includes a drain pipe, the condensation module has an evaporating dish, the condenser transfers heat to the evaporating dish, and the drain pipe is communicated between the drain port and the evaporating dish.