Refrigerator

Abstract

The utility model relates to the technical field of refrigeration equipment, in particular to a refrigerator. The refrigerator comprises a first refrigerator body, a second refrigerator body and an air duct body, a foaming layer is arranged between the first refrigerator body and the second refrigerator body, the air duct body is embedded in the foaming layer, the two ends of the air duct body are provided with an air inlet and an air outlet which are communicated respectively, the air inlet allows cold air to flow in, and the air outlet allows cold air to flow out. A first slope face and a second slope face which are connected are arranged on the bottom wall of the air duct body, the first slope face is obliquely arranged upwards in the direction from the air inlet to the air outlet, and the second slope face is obliquely arranged downwards in the direction from the air inlet to the air outlet. According to the refrigerator, the first slope face and the second slope face which are connected are arranged on the bottom wall of the air duct body, through matching of the upper gradient and the lower gradient, if condensation water is formed, the condensation water is not prone to stop at a certain position of the bottom of the air duct body and can be discharged or dispersed along the slopes due to gradient changes, and therefore the possibility of water accumulation and frosting is reduced, and the service life of the refrigerator is prolonged. And frost blockage forming conditions can be reduced.

Description

Technical Field

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

[0002] Currently, most frost-free refrigerators on the market employ a return air duct design to maintain temperature uniformity between the freezer and refrigerator compartments. However, existing duct designs have some drawbacks. A common approach is to directly attach heating wires to the duct or the refrigerator liner surface, such as installing heating wires directly at the refrigerator return air vent to prevent frost buildup, or laying heating wires over a large area at the bottom of the duct to prevent overcooling of refrigerated items. However, these methods are prone to insecure heating wire attachment due to limitations in the duct itself and its materials, affecting the long-term stability of the refrigerator. Furthermore, heating wires directly attached to the duct foam are limited by the foam's properties, reducing heating capacity and failing to completely prevent frost and ice buildup, leading to frost blockage and increased refrigerator maintenance costs. Utility Model Content

[0003] The purpose of this invention is to at least solve the problem of frost blockage in existing air ducts. This purpose is achieved through the following technical solution:

[0004] This utility model proposes a refrigerator, comprising:

[0005] A first box, wherein a refrigeration compartment is defined within the first box;

[0006] The second cabinet has a foam layer between the first cabinet and the second cabinet, and a freezer compartment is defined inside the second cabinet;

[0007] The air duct body is embedded in the foam layer. The two ends of the air duct body are respectively provided with a connected air inlet and an air outlet. The air inlet is for cold air to flow in, and the air outlet is for cold air to flow out. The bottom wall of the air duct body is provided with a first slope and a second slope connected to each other. Along the direction from the air inlet to the air outlet, the first slope is inclined upward and the second slope is inclined downward.

[0008] According to this invention, a refrigerator features a first and second inclined surface connected to each other on the bottom wall of the air duct body. Along the direction from the air inlet to the air outlet, the first inclined surface is initially set upwards, and then the second inclined surface is set downwards. This arrangement reduces the accumulation of frost caused by water vapor condensing in the cold airflow within the air duct body. When airflow enters from the air inlet, the upward-sloping first surface slightly lifts the airflow, helping to distribute the water-containing cold air more evenly and reducing the chance of condensation in low-lying areas. Subsequently, the downward-sloping second surface changes the airflow direction again, helping to break the long-term stagnation of water vapor in the same location, making it less likely for water vapor to accumulate and form frost in a single location. Through the combination of the upper and lower slopes, if condensation forms, it is less likely to stagnate at a certain position at the bottom of the air duct body, but will be discharged or dispersed along the slope due to the change in slope, thereby reducing the possibility of water accumulation and frost formation. This, to a certain extent, reduces the conditions for frost blockage. Meanwhile, embedding the duct body within the foam layer not only provides insulation but also creates thermal insulation between the duct and the low-temperature external environment, thereby reducing the occurrence of localized overcooling within the duct and lowering the likelihood of water vapor rapidly condensing into frost on the duct surface.

[0009] In addition, the refrigerator according to this utility model may also have the following additional technical features:

[0010] In some embodiments of this utility model, the air duct body is further provided with a heating part, the heating part includes a mounting member and a heating element, the mounting member is disposed in the air duct body and located between the air inlet and the air outlet, and the heating element is disposed on the mounting member and spaced apart from the inner wall of the air duct body.

[0011] In some embodiments of this utility model, the duct body is provided with an installation structure inside, the installation structure cooperates with the installation component, and at least a portion of the installation component has a gap with the inner wall of the duct body.

[0012] In some embodiments of this utility model, the mounting structure includes a groove, which is formed on the inner wall of the air duct. The edge of the mounting member engages with the edge of the groove. A gap exists between a portion of the mounting member and the bottom wall of the groove. The heating element is mounted on a portion of the mounting member that is spaced apart from the inner wall of the air duct body.

[0013] In some embodiments of this utility model, the air duct body includes a first air duct and at least two second air ducts. The first end of each of the second air ducts is connected to one end of the first air duct. The second ends of two adjacent second air ducts are spaced apart. The other end of the first air duct is connected to the air inlet. Each second air duct is connected to at least one air outlet.

[0014] In some embodiments of this utility model, the bottom of the first air duct is provided with a receiving cavity, the first end of the second air duct is connected to the receiving cavity, and the heating part is disposed in the receiving cavity.

[0015] In some embodiments of this utility model, the bottom of the first air duct is provided with the first slope surface, and the bottom of each second air duct is provided with the second slope surface.

[0016] In some embodiments of this utility model, the heating element is a heating wire, which is evenly arranged on the mounting component, and the two ends of the heating wire are located on the same side of the mounting component.

[0017] In some embodiments of this utility model, the angle between the first slope surface and the reference surface is in the range of 7° to 8°, the angle between the second slope surface and the reference surface is in the range of 7° to 8°, and the reference surface is perpendicular to the axis of the air outlet.

[0018] In some embodiments of this utility model, the air duct body includes a housing, the housing includes a first housing and a second housing that are detachably connected, and the first housing and the second housing together form the air duct body. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 An exploded structural diagram of the air duct body according to an embodiment of the present invention is shown schematically.

[0021] Figure 2 A schematic diagram of the structure of the heating section according to an embodiment of the present invention is shown.

[0022] Figure 3 A schematic diagram of a partial structure of a refrigerator according to an embodiment of the present invention is shown.

[0023] Figure 4 for Figure 3 The diagram shown is a partial structural schematic of the refrigerator.

[0024] Figure 5 A schematic first-view view of a portion of a refrigerator according to an embodiment of the present invention is shown;

[0025] Figure 6 for Figure 5 A cross-sectional view of the AA plane;

[0026] Figure 7 for Figure 6 Partial sectional view of the BB surface.

[0027] The attached figures are labeled as follows:

[0028] 100. Refrigerator;

[0029] 10. First housing; 101. Opening; 11. Refrigerated air duct; 20. Second housing; 30. Air duct body; 301. Air inlet; 302. Air outlet; 31. First shell; 311. First air duct; 312. Second air duct; 313. Receiving cavity; 32. Second shell; 33. Heating unit; 331. Mounting component; 332. Heating element. Detailed Implementation

[0030] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0031] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0032] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0033] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0034] like Figure 1 and Figure 7 As shown, according to an embodiment of the present invention, a refrigerator 100 is proposed, comprising a first cabinet 10, a second cabinet 20, and an air duct body 30. The first cabinet 10 defines a refrigerator compartment, and a foam layer is provided between the first cabinet 10 and the second cabinet 20. The second cabinet 20 defines a freezer compartment. The air duct body 30 is embedded in the foam layer. The two ends of the air duct body 30 are respectively provided with a connected air inlet 301 and an air outlet 302. The air inlet 301 allows cold air to flow in, and the air outlet 302 allows cold air to flow out. The bottom wall of the air duct body 30 is provided with a connected first slope and a second slope. Along the direction from the air inlet 301 to the air outlet 302, the first slope is inclined upward, and the second slope is inclined downward.

[0035] According to the refrigerator 100 of this embodiment, a first and second inclined surface are connected to each other on the bottom wall of the air duct body 30. Along the direction from the air inlet 301 to the air outlet 302, the first inclined surface is initially set upwards, and then the second inclined surface is set downwards. This arrangement slows down the accumulation of water vapor in the cold airflow within the air duct body 30, preventing condensation. When airflow enters from the air inlet, the upward-sloping first inclined surface slightly lifts the airflow, helping to distribute the water-containing cold air more evenly and reducing the chance of condensation in low-lying areas. Then, the downward-sloping second inclined surface changes the airflow direction again, helping to break the long-term stagnation of water vapor in the same location, making it less likely for water vapor to accumulate in a single location and form frost. Through the combination of the upper and lower slopes, if condensation forms, it is less likely to stagnate at a certain position at the bottom of the air duct body 30, but will be discharged or dispersed along the slope due to the change in slope, thereby reducing the possibility of water accumulation and frost formation. This, to a certain extent, reduces the conditions for frost blockage. Meanwhile, embedding the air duct body 30 within the foam layer not only provides insulation but also creates thermal insulation between the air duct body 30 and the external low-temperature environment. This reduces the occurrence of localized overcooling within the air duct body 30 and lowers the likelihood of water vapor rapidly condensing into frost on the inner surface of the air duct body 30.

[0036] like Figures 3 to 7 As shown, in some embodiments, both the first cabinet 10 and the second cabinet 20 have openings 101. The refrigerator 100 includes two doors, which are respectively installed on the first cabinet 10 and the second cabinet 20, for opening or closing the openings 101 of the first cabinet 10 and the second cabinet 20. Specifically, the first cabinet 10 is located at the bottom of the second cabinet 20. The air duct body 30 is located at the top of the first cabinet 10.

[0037] Understandably, the air outlet 302 is located close to the opening 101, meaning it's near the door. This allows cold air to be more easily transferred to the door area, shortening the cold air delivery path and thus more effectively reducing the temperature of the door and bottle racks, improving the overall cooling efficiency of the refrigerator compartment. Furthermore, the placement of the air outlet 302 near the door ensures that cold air evenly covers the refrigerator compartment, including the bottle racks on the door, reducing temperature differences between areas and improving the temperature uniformity of the refrigerated environment, which helps extend the freshness of food. Additionally, after the refrigerator door is closed, the air duct 30 quickly guides the cold air to the door area, allowing the door temperature to quickly return to the ideal level, maintaining the refrigeration effect and extending the shelf life of food.

[0038] like Figures 1 to 2As shown, in some embodiments, the air duct body 30 includes a heating part 33, which includes a mounting member 331 and a heating element 332. The mounting member 331 is disposed inside the air duct body 30 and located between the air inlet 301 and the air outlet 302. A gap exists between a portion of the structure of the mounting member 331 and the air duct body 30. The heating element 332 is disposed on the mounting member 331 and spaced apart from the inner wall of the air duct body 30. By providing the mounting member 331 and the heating element 332 inside the air duct body 30, and by leaving gaps between the mounting member 331 and the air duct body 30, and between the heating element 332 and the air duct body 30, the heating element 332 is prevented from directly adhering to the foam of the air duct body 30. This effectively prevents unstable heating due to the characteristics of the foam material, thereby solving the problem of easy frost and ice formation in the air duct, and further improving the operational reliability of the refrigerator 100. Meanwhile, the heating element 332 is fixed inside the air duct body 30 by the mounting part 331, and is indirectly connected to the air duct body 30, which avoids the loosening or falling off of the heating element 332 caused by the traditional bonding method, and ensures the long-term stability of the heating part 33.

[0039] In some embodiments, the duct body 30 includes a housing, which is composed of a first housing 31 and a second housing 32 that are detachably connected to each other. The first housing 31 and the second housing 32 together form the duct body 30. One end of the duct body 30 is connected to an air inlet 301, and the other end of the duct is connected to an air outlet 302. The first housing 31 and the second housing 32 are connected by snap-fit ​​to ensure a tight fit and provide convenient disassembly and assembly. Furthermore, a sealing strip or sealing coating is provided at the connection point of the two housings to enhance sealing and prevent air leakage. The detachable connection of the first housing 31 and the second housing 32 makes maintenance, replacement of the heating element, or cleaning of the duct interior more convenient, reducing operating costs and complexity.

[0040] It is understood that the air duct body 30 includes a first air duct 311 and at least two second air ducts 312. The first end of each second air duct 312 is connected to the first air duct 311. The second ends of two adjacent second air ducts 312 are spaced apart. The first air duct 311 is connected to the air inlet 301. Each second air duct 312 is connected to at least one air outlet 302.

[0041] Furthermore, the air duct includes a first air duct 311 and two second air ducts 312. The first ends of each second air duct 312 are connected to the first air duct 311, and the second ends of the two second air ducts 312 are spaced apart. Therefore, the air duct body 30 is Y-shaped. First, through the Y-shaped branch design, the cold air in the first air duct 311 can be evenly distributed to the two second air ducts 312, thereby ensuring uniform airflow distribution in different areas of the refrigerator compartment, especially significantly improving the cooling speed of the area above the door frame. Second, the connection between the first air duct 311 and the second air duct 312 adopts a streamlined airflow guide design, reducing turbulence generation, improving the cold air delivery efficiency, and reducing the energy consumption of the refrigerator 100's refrigeration system.

[0042] Specifically, the included angle between the axes of the two second air ducts 312 is 60°.

[0043] In some embodiments, an installation structure is provided inside the air duct, which cooperates with the mounting member 331 to create a gap between at least a portion of the mounting member 331 and the inner wall of the air duct body 30. By providing a gap between the mounting member 331 and the inner wall of the air duct body, the risk of heat from the heating element 332 being directly transferred to the air duct body 30 during operation is effectively reduced. The gap also acts as insulation, preventing the air duct body 30 from deforming or being damaged due to uneven heating or excessive heat, especially when the air duct body 30 is made of heat-sensitive materials such as foam or plastic. The gap allows heat to be transferred more evenly to the air duct body 30, avoiding localized overheating. This design not only protects the air duct body 30 but also optimizes airflow within the air duct body 30, thereby improving overall heating efficiency and achieving uniform heating.

[0044] Specifically, the mounting structure includes a groove located on the inner wall of the duct body 30, with the edge of the mounting piece 331 abutting against the edge of the groove. The groove is axially oriented along the inner wall of the duct body 30, forming a T-shaped groove. The mounting piece 331 is a T-shaped rigid plastic plate whose shape matches the groove and has smooth edges to prevent jamming during insertion. The plate's thickness is less than the groove depth, ensuring a certain gap between the plate and the bottom wall of the groove after insertion. After installation, the surface of the mounting piece 331 is completely flush with the inner wall of the duct body. Heating wires are integrated into the surface of the T-shaped plate, ensuring the stability of the heating element 33 by tightly fitting against the edge of the groove, while also guaranteeing the heat insulation effect between the T-shaped plate and the duct.

[0045] In some embodiments, the heating element 332 is a heating wire, which is evenly arranged on the mounting member 331, with both ends of the heating wire located on the same side of the mounting member 331. The even arrangement of the heating wire on the surface of the mounting member 331 ensures uniform heat distribution in each area of ​​the mounting member 331, avoiding localized overheating or cold spots. Uniform heating allows the frost layer inside the entire air duct to melt synchronously, reducing localized residue and improving anti-frost performance. Furthermore, the fact that both ends of the heating wire are concentrated on the same side of the mounting member 331 greatly simplifies the electrical wiring design, reducing connection points and circuit complexity. By reducing wiring length, resistance loss is reduced, ensuring higher energy utilization during heating wire operation.

[0046] Specifically, the mounting component 331 has a T-shaped planar structure with a large surface area for mounting heating wires. The heating wires are evenly distributed on the surface of the mounting component 331 in a curved pattern, arranged in an "S" shape. The curves are carefully designed to ensure coverage of the entire effective area of ​​the mounting component 331. The two ends of the heating wires are located on the same side of the mounting component 331 and concentrated at the bottom of the mounting component 331, facilitating connection to the circuit and simplifying electrical wiring and maintenance.

[0047] Specifically, the heating wire is fixed to an aluminum foil sheet, which is then attached to the surface of the mounting component 331. The aluminum foil has good thermal conductivity, which can evenly distribute the heat from the heating wire.

[0048] In some embodiments, along the direction from the air inlet 301 to the air outlet 302, the intersection of the first and second inclined surfaces forms a middle region. The bottom wall of this middle region protrudes inwards into the duct body 30, with the protrusion height of the duct body 30 gradually decreasing from the middle region to the air inlet 301 and from the middle region to the air outlet 302. The middle region of the duct body 30 is the highest point, forming a flow channel structure resembling an inverted "V". This gradually decreasing slope design ensures that condensate or water from melting frost can flow naturally along the direction of gravity to the drainage area near the air inlet 301 or air outlet 302. Firstly, the inverted "V" shape of the duct allows condensate to flow naturally along the direction of gravity towards both ends (air inlet 301 and air outlet 302), preventing moisture from stagnating inside the duct body 30. Condensate is quickly drained through integrated drain channels and holes, reducing the risk of icing or frost blockage caused by water accumulation and improving the long-term operational reliability of the duct body 30. Secondly, the inverted "V" shaped design, combined with the heating element 33, effectively prevents frost buildup at the low points of the duct. Through uniform heating and gravity, the condensate formed after the frost melts can drain smoothly. The heating element 33 is installed in the middle area of ​​the duct, maximizing coverage of the entire duct area and ensuring a frost-free environment within the duct at all times.

[0049] Specifically, the angle between the first slope and the reference plane is between 7° and 8°, and the angle between the second slope and the reference plane is also between 7° and 8°. The reference plane is perpendicular to the axis of the air outlet (which is the horizontal plane in this embodiment). First, both the first and second slopes have angles between 7° and 8° with the horizontal plane. This slope ensures that condensate under gravity can flow rapidly along the plane to both ends (air inlet 301 and air outlet 302). The condensate is collected in the drainage channels or drainage holes at both ends of the duct, preventing water from accumulating in the middle of the duct and reducing frost and ice formation. Second, the slope design of the first and second slopes conforms to the principles of airflow dynamics. The 7° to 8° angle ensures that the cold air flows smoothly from the middle area to both ends. The slope optimizes the cold air flow path, reduces the generation of turbulence and eddies, and improves the airflow delivery efficiency of the duct.

[0050] In some embodiments, a humidity sensor and a temperature sensor are provided in the first air duct 311, and at least one humidity sensor and a temperature sensor are provided in the second air duct 312. The humidity sensor and temperature sensor are arranged at key locations in the first air duct 311 (near the air inlet 301) to monitor the humidity and temperature of the cold air entering the duct. Real-time detection of the initial state of the cold air helps determine the risk of frost blockage or condensation, providing a predictive basis for the heater's operation. A humidity sensor and temperature sensor are arranged near the air outlet 302 in at least one second air duct 312 to monitor the air outlet status. The heating effect is evaluated to ensure timely adjustment of the heating mode. When the humidity at the air outlet is higher than a first preset humidity (e.g., 80%) or the temperature is lower than a first preset temperature (e.g., 0°C), the heating wire is activated to melt the frost. When the humidity drops to a second preset humidity (e.g., 50%) or the temperature rises to a second preset temperature (e.g., 5°C), heating stops. Furthermore, an intermittent mode is used during heating, with a periodic cycle of heating time T0 (e.g., 5 seconds) and stop time T1 (e.g., 15 seconds). Intermittent heating can effectively control the heating temperature and prevent overheating from increasing energy consumption or damaging the air duct.

[0051] It is understood that the air duct body 30 also includes a receiving cavity 313, which is located at the bottom of the first air duct 311. One end of each second air duct 312 is connected to the receiving cavity 313, and the heating element 33 is located in the receiving cavity 313. The receiving cavity 313 is designed in a trapezoidal shape to reduce airflow turbulence. The short side of the trapezoidal receiving cavity 313 faces the air inlet 301, and the two second air ducts 312 are respectively connected to the long side of the trapezoidal receiving cavity 313. The heating element 33 is located in the receiving cavity 313 and is connected to the air duct body 30 through the mounting member 331, forming a suspended or isolated setting of the heating element 332, ensuring that a uniform gap is maintained between the heating element 33 and the inner wall of the air duct body 30. By setting the heating element 33 in the receiving cavity 313, the frost blockage problem caused by the low temperature when cold air flows in the air duct body 30 can be effectively eliminated, ensuring smooth airflow and avoiding performance degradation of the air duct body 30. The receiving cavity 313 serves as the transition area between the first air duct 311 and the second air duct 312. Through streamlined design and air guiding structure, the cold air distribution path is optimized, ensuring uniform airflow distribution within the two second air ducts 312 and improving the cooling efficiency of the cold storage compartment.

[0052] In some embodiments, the refrigerator 100 further includes a freezer air duct and a refrigerator air duct 11. The freezer air duct is located in the side wall of the second compartment 20 away from the opening 101, and the refrigerator air duct 11 is located in the side wall of the first casing 31 away from the opening 101. A fan is installed in the freezer air duct to provide power to the entire cooling system and drive the flow of cold air. The freezer air duct delivers cold air into the freezer compartment through four freezer air vents, achieving rapid cooling of the freezer compartment. Some cold air enters the air duct through the air inlet 301. The air duct is designed with a Y-shaped structure, dividing the cold air into two parts, which enter the refrigerator compartment through two air outlets 302. The refrigerator air duct 11 is located on the rear side wall of the refrigerator compartment and works in conjunction with the air duct body 30 to complete the cold air delivery and return of the refrigerator compartment. The two air outlets 302 at the top of the refrigerator compartment are located above the bottle rack area of ​​the door, and cold air is delivered vertically into the bottle rack area. This design can quickly reduce the temperature of beverages or food in the bottle racks, significantly improving the cooling efficiency of the refrigerator compartment.

[0053] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A refrigerator, characterized in that, include: A first box, wherein a refrigeration compartment is defined within the first box; The second cabinet has a foam layer between the first cabinet and the second cabinet, and a freezer compartment is defined inside the second cabinet; The air duct body is embedded in the foam layer. The two ends of the air duct body are respectively provided with a connected air inlet and an air outlet. The air inlet is for cold air to flow in, and the air outlet is for cold air to flow out. The bottom wall of the air duct body is provided with a first slope and a second slope connected to each other. Along the direction from the air inlet to the air outlet, the first slope is inclined upward and the second slope is inclined downward.

2. The refrigerator according to claim 1, characterized in that, The air duct body is also provided with a heating part, which includes a mounting component and a heating component. The mounting component is located in the air duct body and between the air inlet and the air outlet. The heating component is located on the mounting component and is spaced apart from the inner wall of the air duct body.

3. The refrigerator according to claim 2, characterized in that, The duct body has an internal installation structure that cooperates with the mounting component, and at least a portion of the mounting component has a gap with the inner wall of the duct body.

4. The refrigerator according to claim 3, characterized in that, The mounting structure includes a groove formed on the inner wall of the air duct. The edge of the mounting component engages with the edge of the groove. A gap exists between a portion of the mounting component and the bottom wall of the groove. The heating element is mounted on a portion of the mounting component that is spaced apart from the inner wall of the air duct body.

5. The refrigerator according to claim 2, characterized in that, The air duct body includes a first air duct and at least two second air ducts. The first end of each second air duct is connected to one end of the first air duct. The second ends of two adjacent second air ducts are spaced apart. The other end of the first air duct is connected to the air inlet. Each second air duct is connected to at least one air outlet.

6. The refrigerator according to claim 5, characterized in that, The bottom of the first air duct is provided with a receiving cavity, and the first end of the second air duct is connected to the receiving cavity. The heating part is located in the receiving cavity.

7. The refrigerator according to claim 5, characterized in that, The bottom of the first air duct is provided with the first slope surface, and the bottom of each second air duct is provided with the second slope surface.

8. The refrigerator according to claim 2, characterized in that, The heating element is a heating wire, which is evenly arranged on the mounting component, and both ends of the heating wire are located on the same side of the mounting component.

9. The refrigerator according to any one of claims 1 to 8, characterized in that, The angle between the first slope and the reference surface is in the range of 7° to 8°, the angle between the second slope and the reference surface is in the range of 7° to 8°, and the reference surface is perpendicular to the axis of the air outlet.

10. The refrigerator according to any one of claims 1 to 8, characterized in that, The air duct body includes a housing, which includes a first housing and a second housing that are detachably connected, and the first housing and the second housing together form the air duct body.

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