Refrigeration equipment

Abstract

This utility model provides a refrigeration device, including a housing that constitutes the outer shell of the refrigeration device; a liner disposed within the housing, the liner having a refrigeration chamber, the liner having a bottom wall and a first side wall, the first side wall being disposed on one side of the bottom wall, the bottom of the first side wall being connected to one side of the bottom wall; an air duct cover plate disposed above the bottom wall, the air duct cover plate, the first side wall and one side of the bottom wall forming an evaporator compartment; an evaporator disposed within the evaporator compartment; wherein, the air duct cover plate and the first side wall are spaced apart to form a first interval area, the side of the air duct cover plate near the first side wall having a first return air inlet facing the first interval area, the first interval area connecting the first return air inlet and the refrigeration chamber, the refrigeration device of this application can prevent the return air inlet in the refrigeration chamber from being blocked, improving the air circulation efficiency in the refrigeration chamber.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration electrical technology, and mainly to a refrigeration device. Background Technology

[0002] Refrigeration equipment is a device that maintains a constant low temperature to store goods, and it is widely used in modern life and industrial production. For example, a refrigerator has a refrigeration compartment that creates a refrigerated environment for storing items.

[0003] In a frost-free horizontal refrigerator, cold air is blown from the air supply vent into the cooling compartment and then returns to the evaporator via the first return air vent. Since the first return air vent is usually located at the bottom of the refrigerator, items placed at the bottom of the refrigerator can easily block the return air vent, affecting the air circulation in the cooling compartment and thus reducing the cooling effect.

[0004] Currently, the main solution is to add shelf components inside the refrigeration compartment to prevent the bottom air return vent from being blocked. However, shelf components increase costs. For air-cooled horizontal refrigerators, adding shelf components will take up product volume inside the refrigerator, and the shelf components are not well integrated with the product, which will also affect the overall appearance of the product. Utility Model Content

[0005] The purpose of this invention is to provide a refrigeration device that can prevent the return air vents in the refrigeration room from being blocked, thereby improving the air circulation efficiency in the refrigeration room.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] One aspect of this application provides a refrigeration device, including a housing constituting the outer shell of the refrigeration device; a liner disposed within the housing, the liner having a refrigeration chamber, the liner having a bottom wall and a first side wall, the first side wall being disposed on one side of the bottom wall, the bottom of the first side wall being connected to one side of the bottom wall; an air duct cover plate covering the bottom wall, an evaporator compartment being formed between the air duct cover plate, the first side wall, and one side of the bottom wall; an evaporator disposed within the evaporator compartment; wherein the air duct cover plate and the first side wall are spaced apart to form a first interval area, the side of the air duct cover plate near the first side wall having a first return air inlet facing the first interval area, the first interval area connecting the first return air inlet and the refrigeration chamber.

[0008] The above technical solution has the following advantages or beneficial effects: The first interval area formed by the spaced arrangement of the duct cover plate and the first side wall can serve as a reserved duct path for return air. Since the first interval area is located close to the side wall of the refrigeration chamber, it is far from the main area where items are placed at the bottom of the refrigeration chamber, which effectively reduces the possibility of items obstructing the first interval area. By providing a first return air inlet facing the first side wall on the duct cover plate, the first return air inlet is offset from the main area where items are placed at the bottom of the refrigeration chamber in the horizontal direction. Moreover, the opening direction of the first return air inlet is a side opening or an oblique opening, which avoids being directly set on the bottom plane of the refrigeration chamber. This effectively prevents items from directly covering or sticking to the first return air inlet, thus greatly reducing the risk of being obstructed by items. During the operation of the refrigeration unit, the air in the refrigeration chamber can enter the first interval area downward along the first side wall, and then flow into the evaporator compartment through the first return air inlet.

[0009] In some embodiments of this application, a refrigeration device is provided, wherein the duct cover includes a duct top plate disposed transversely above the bottom wall of the refrigeration device; a duct side plate disposed vertically within the refrigeration chamber of the refrigeration device, the duct side plate extending downward from one side of the duct top plate; an evaporator compartment formed between the duct top plate, the duct side plate, the first side wall, and the bottom wall; the duct top plate and the first side wall are spaced apart to form a first interval area, and the first return air inlet is disposed on the side of the first side wall and the duct top plate near the first side wall.

[0010] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: the side of the air duct top plate near the first side wall is arranged at an interval with the first side wall to form a first interval area, so that the air in the refrigeration room can enter the first return air vent through the first interval area. The first interval area is located near the side edge of the refrigeration room. Even if some items are placed close to the first side wall when the air duct top plate is placed, the setting of the first interval area can prevent the items from getting closer to the first return air vent, thereby reducing the possibility of partial obstruction. The air in the refrigeration room can enter the first return air vent more smoothly.

[0011] In some embodiments of this application, a refrigeration device is provided, wherein the first sidewall is provided with an anti-shading rib, the anti-shading rib extends along the height direction of the refrigeration device, and the lower end of the anti-shading rib extends to the first interval area; there are multiple anti-shading ribs, the multiple anti-shading ribs are arranged at intervals, and a return air gap is formed between two adjacent anti-shading ribs, the lower end of the return air gap is connected to the first interval area.

[0012] Another technical solution described above has the following advantages or beneficial effects: In actual use, users may place items near the first side wall of the refrigeration room, potentially obstructing the first partition area. By arranging multiple anti-obstruction ribs at intervals, with return air gaps formed between any adjacent ribs, the vertical structure of the anti-obstruction ribs can create spatial interference with the placement of items, making it difficult for large items to completely adhere to the first side wall, thus avoiding the formation of a continuous surface that obstructs the entire return air area. Furthermore, the return air gaps formed by the multiple anti-obstruction ribs are arranged at intervals; even if some return air gaps are unusable due to obstruction by items, the other unobstructed return air gaps can still serve as airflow channels to compensate for the return air, thereby ensuring that the air in the refrigeration room can effectively return to the evaporator compartment. Moreover, by extending the anti-obstruction ribs along the height direction of the refrigeration unit, the anti-obstruction ribs form a continuous anti-obstruction structure in the vertical space. For taller or stacked items, the anti-obstruction ribs can effectively prevent them from obstructing the top of the first partition area in the height direction.

[0013] In some embodiments of this application, a refrigeration device is provided, wherein a support cover is provided on the top surface of the air duct top plate, and a first return air inlet is provided on the side of the support cover facing the first side wall.

[0014] Another technical solution described above has the following advantages or beneficial effects: the raised support cover makes it difficult for items placed on top of the duct cover to completely adhere to the top surface of the duct cover, while also facilitating the creation of more return air space between the items and the first side wall, reducing the obstruction of the return air path by the items. By forming the first return air inlet below the support cover and facing the first side wall, the first return air inlet is positioned facing the first side wall, thus avoiding direct exposure of the first return air inlet on the supporting surface of the duct top plate, reducing the risk of obstruction by items. Simultaneously, the first return air inlet is higher than the top surface of the duct top plate, which facilitates more efficient and rapid return of air from the refrigeration room to the evaporator compartment through the side-opening first return air inlet.

[0015] In some embodiments of this application, a refrigeration device is provided, wherein the duct side plate is arranged at a distance from the first side wall to form a second interval area, the second interval area being connected to the refrigeration chamber; the side of the duct side plate near the first side wall facing the second interval area is provided with a second return air inlet, the second return air inlet being connected to the second interval area and the evaporator compartment.

[0016] Another technical solution described above has the following advantages or beneficial effects: the second interval area formed by arranging the duct side plate and the first side wall at intervals can serve as a reserved duct path for return air. Since the second interval area is located close to the side wall of the refrigeration chamber, it is far from the main area where items are placed at the bottom of the refrigeration chamber, effectively reducing the possibility of items obstructing the second interval area. By providing a second return air inlet facing the first side wall on the duct side plate, with the inlet opening to the side or at an angle, the second return air inlet is positioned away from the main area where items are placed at the bottom of the refrigeration chamber, thus avoiding direct placement on the bottom plane of the refrigeration chamber and reducing the risk of obstruction by items. Furthermore, the second return air inlet is located on the duct side plate, and its distribution is staggered from the first return air inlet, which helps guide cold air from different areas back to the evaporator compartment, thereby increasing the amount of return air flowing from the refrigeration chamber to the evaporator compartment and further improving the return air efficiency of the refrigeration unit.

[0017] In some embodiments of this application, a refrigeration device is provided, wherein a first interval region extends along the side edge of the bottom wall near the first side wall; a second interval region extends along the height direction of the refrigeration device, and the upper end of the second interval region is connected to one end of the first interval region.

[0018] Another technical solution described above has the following advantages or beneficial effects: the second partition is arranged along the height direction and located on the side of the air duct side panel close to the first side wall. This does not affect the placement space of items in the refrigeration room, and the first and second partitions can serve as hidden return air vents, ensuring the return air volume in the refrigeration room. Furthermore, the upper end of the second partition is connected to the first partition, and the connection point between the second and first partitions is located at a corner. The corner is difficult to be blocked by items. Even if items placed on the top plate of the air duct block the first or second partition, the air in the refrigeration room can still enter the first or second return air vent through the connection point between the first and second partitions.

[0019] In some embodiments of this application, a refrigeration device is provided, wherein a plurality of ribs are provided on the side of the duct side plate away from the evaporator compartment, and the plurality of ribs are arranged at intervals; the duct side plate is provided with a third return air inlet, the third return air inlet is located between two adjacent ribs, and the third return air inlet connects the refrigeration compartment and the evaporator compartment.

[0020] Another technical solution described above has the following advantages or beneficial effects: By adding a third return air inlet, the return air volume of the evaporator compartment can be effectively increased. Furthermore, the opening direction of the third return air inlet differs from the opening positions of the first and second return air inlets, further increasing the multi-angle airflow return paths within the refrigeration room. Moreover, since multiple ribs are spaced apart on the side of the duct sideplate away from the evaporator compartment, and the third return air inlet is formed between two adjacent ribs, the ribs can effectively separate items located on one side of the duct sideplate from the third return air inlet, thereby preventing items on one side of the duct sideplate from directly blocking the third return air inlet and avoiding the situation where items completely cover the third return air inlet, leading to poor airflow.

[0021] In some embodiments of this application, a refrigeration device is provided, the refrigeration device further comprising a heat insulation component disposed within the evaporator compartment. The heat insulation component includes a first heat insulation portion covering the top of the evaporator, the first heat insulation portion being disposed between the top plate of the air duct and the top of the evaporator; and a second heat insulation portion covering one side of the evaporator, the second heat insulation portion being disposed between the side plate of the air duct and the evaporator. The side of the first heat insulation portion near the first side wall is spaced apart from the first side wall to form a first gap space, the first gap space connecting the first return air inlet and the evaporator compartment. The side of the second heat insulation portion near the first side wall is spaced apart from the first side wall to form a second gap space, the second gap space connecting the second return air inlet and the evaporator compartment.

[0022] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: The first insulation part, near the first sidewall, forms a first space between itself and the first sidewall. This first space connects the first return air inlet and the evaporator compartment, thus preventing the first insulation part from occupying the return air path. While achieving good insulation for the evaporator, the first insulation part allows the airflow entering the first return air inlet to smoothly return to the first space through the first space. The second insulation part, near the first sidewall, forms a second space between itself and the first sidewall. This second space connects the second return air inlet and the evaporator compartment. This prevents the second insulation part from occupying the return air path. While achieving good insulation for the evaporator, the second insulation part allows the airflow entering the second return air inlet to smoothly return to the first space through the first space, thus enabling cold air to smoothly enter the evaporator compartment and exchange heat with the evaporator, improving return air efficiency and accelerating the refrigeration cycle.

[0023] In some embodiments of this application, a refrigeration device is provided, wherein the bottom wall includes a first stepped wall arranged laterally along the refrigeration device, the first stepped wall being disposed on the side of the top plate of the air duct away from the side plate of the air duct; a second stepped wall extending downward from the side of the first stepped wall near the top plate of the air duct; and a third stepped wall spaced below the top plate of the air duct, the third stepped wall extending downward from the lower end of the second stepped wall toward the side plate of the air duct; the second stepped wall, the third stepped wall, the top plate of the air duct, and the side plate of the air duct together form the evaporator compartment.

[0024] Another technical solution described above has the following advantages or beneficial effects: the second-step wall, the third-step wall, the top plate of the air duct, and the side plate of the air duct enclose and form an evaporator compartment, thereby creating a relatively independent installation space for the evaporator, allowing the evaporator to be rationally arranged within it. Specifically, the first-step wall, the second-step wall, and the third-step wall constitute a stepped structure of the bottom wall. This stepped structure of the bottom wall, together with the top plate of the air duct and the side plate of the air duct, can enclose the evaporator compartment, thus increasing the connection points and contact area between the bottom wall and the air duct cover plate, making the connection between the bottom wall and the top and side plates of the air duct more robust and stable.

[0025] In some embodiments of this application, a refrigeration device is provided. The liner further includes a second sidewall, which is disposed opposite to the first sidewall. The lower end of the second sidewall is connected to the side of the bottom wall away from the first sidewall. The refrigeration device also includes an air supply housing, which is disposed on the second sidewall. An air supply duct is formed between the air supply housing and the second sidewall. The air supply duct extends along the height direction of the refrigeration chamber. The lower end of the air supply duct communicates with the evaporator compartment. An air outlet is provided at the upper end of the air supply housing. Air in the evaporator compartment can be transported upward through the air supply duct and blown into the refrigeration chamber through the air outlet, and then returned to the evaporator compartment through the first interval area and the first return air outlet.

[0026] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: by setting the air supply housing on the second side wall and forming an air supply duct on one side of the second side wall, the air supply duct is connected to the evaporator compartment, so that the cold air generated in the evaporator compartment can be transported upward through the air supply port to the refrigeration room. The cold air in the refrigeration room naturally sinks and flows back to the evaporator compartment through the first interval area set near the first side wall. In this way, the airflow can be more comprehensively distributed in the entire refrigeration room, thereby forming a more stable convection circulation in the refrigeration room. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the principles of this application.

[0028] Figure 1 This is a schematic diagram of a refrigeration device according to an embodiment of this application;

[0029] Figure 2 for Figure 1 A partial schematic diagram;

[0030] Figure 3 for Figure 2 A three-dimensional image;

[0031] Figure 4 for Figure 2 A cross-sectional schematic diagram;

[0032] Figure 5 for Figure 1 A cross-sectional schematic diagram;

[0033] Figure 6 for Figure 1 Another cross-sectional view;

[0034] Figure 7 for Figure 6 Enlarged view of a portion at point A;

[0035] Figure 8 for Figure 2 A three-dimensional schematic diagram of the air duct cover;

[0036] Figure 9 for Figure 2 Schematic diagram of the inner chamber;

[0037] Figure 10 for Figure 9 Another cross-sectional schematic diagram;

[0038] The correspondence between the reference numerals and the component names is as follows:

[0039] 1. Housing; 101. Compressor compartment; 11. Door; 12. Evaporator; 13. Compressor; 14. Drain pipe; 15. Drain tray;

[0040] 2. Inner chamber; 201. Refrigeration compartment; 202. Evaporator compartment; 202. First partition area; 203. Second partition area; 204. First partition space; 205. Second partition space; 21. Bottom wall; 211. First stepped wall; 212. Second stepped wall; 213. Third stepped wall; 22. First side wall; 23. Second side wall;

[0041] 3. Duct cover; 301. First return air inlet; 3011. First sub-return air inlet; 302. Second return air inlet; 3021. Second sub-return air inlet; 303. Third return air inlet; 31. Duct top plate; 32. Duct side plate; 33. First partition plate; 34. Support cover; 35. Second partition plate; 36. Rib;

[0042] 4. Anti-shading ribs; 401. Return air gap;

[0043] 5. Insulation component; 51. First insulation section; 52. Second insulation section;

[0044] 6. Air supply casing; 601. Air supply duct; 602. Air outlet; 61. Refrigeration fan. Detailed Implementation

[0045] This utility model provides a refrigeration device. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0046] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] The refrigeration device in the embodiments of the present invention can be a freezer, refrigerator or other refrigeration cabinet. The following uses a freezer as an example to describe in detail the improved technical solution of the refrigeration device in the embodiments of the invention.

[0049] Figure 1 This is a schematic diagram of a refrigeration device according to an embodiment of this application.

[0050] like Figure 1As shown, the refrigeration device provided in this embodiment of the present invention includes a housing 1. The housing 1 can adopt a hollow structure such as a cuboid. The housing 1 forms the outer shell of the refrigeration device. It should be noted that the housing 1 can also adopt a hollow shell structure of other shapes.

[0051] Figure 2 for Figure 1 A partial schematic diagram; Figure 3 for Figure 2 A 3D diagram. It should be noted that... Figure 2 for Figure 1 A schematic diagram of the hidden door 11.

[0052] like Figure 2 and Figure 3 As shown, in some embodiments, the interior of the housing 1 may form a refrigeration chamber 201 with a top opening. Multiple refrigeration chambers 201 may be provided.

[0053] In some embodiments, multiple refrigeration compartments 201 can serve as independent storage spaces, such as freezers, refrigerators, and variable temperature compartments, to meet different refrigeration needs such as freezing, refrigeration, and variable temperature according to different types of food, and to store items that require refrigeration or freezing. The multiple refrigeration compartments 201 can be arranged vertically or horizontally.

[0054] like Figure 2 As shown, in some embodiments, the refrigeration device may include a liner 2. The liner 2 may be disposed inside the housing 1. A refrigeration chamber 201 may be provided inside the liner 2. A foaming space is formed between the liner 2 and the housing 1. When the foaming material is filled into the foaming space, it can effectively insulate the refrigeration chamber 201.

[0055] like Figure 1 As shown, in some embodiments, the refrigeration device may include a door 11. The door 11 is disposed on the top front side of the housing 1 and covers the opening of the refrigeration compartment 201 for opening and closing the refrigeration compartment 201.

[0056] It should be noted that multiple doors 11 can be installed. Each door 11 can be installed in a one-to-one correspondence with a refrigeration room 201. Multiple doors 11 can open and close a single refrigeration room 201 simultaneously. A single door 11 can also open and close multiple refrigeration rooms 201 simultaneously.

[0057] In some embodiments, the refrigerator includes a refrigeration system. The refrigeration system may be located inside the refrigerator body 1. The refrigeration system is used to provide cold air to the interior of the refrigerator to maintain a low-temperature environment in each refrigeration compartment 201.

[0058] Figure 4 for Figure 1 A cross-sectional schematic diagram.

[0059] like Figure 4 As shown, in some embodiments, the refrigeration system includes a compressor 13. The compressor 13 serves as the power source for the refrigeration cycle, drawing in low-temperature, low-pressure refrigerant gas and compressing it into a high-temperature, high-pressure gas. The compressor 13 can deliver the high-temperature, high-pressure refrigerant to the condenser.

[0060] In some embodiments, the refrigeration system includes a condenser (not shown). The condenser can be used to receive refrigerant flowing out of compressor 13, cooling the high-temperature, high-pressure refrigerant gas from compressor 13 and converting it into a liquid state. The condenser can transfer heat from the refrigerant to the surrounding air, thereby lowering the temperature of the refrigerant.

[0061] In some embodiments, the refrigeration system includes a throttling device (not shown). The condenser can deliver the condensed refrigerant to the throttling device. The throttling device may be a capillary tube. The throttling device can be used to reduce the pressure of the refrigerant.

[0062] like Figure 4 As shown, in some embodiments, the refrigeration system includes an evaporator 12. A throttling device can deliver a throttled and depressurized refrigerant into the evaporator 12. The evaporator 12 can be used for refrigerant vapor to evaporate and boil, thereby absorbing heat from the surrounding medium.

[0063] In some embodiments, the compressor 13, condenser, throttling device, and evaporator 12 can be connected in sequence to form a refrigeration circuit. The refrigerant can circulate within the refrigeration circuit to achieve refrigeration of the refrigeration chamber 201.

[0064] like Figure 3 As shown, in some embodiments, the liner 2 may be provided with a bottom wall 21 and a first side wall 22. The bottom wall 21 is located at the bottom of the liner 2, and the first side wall 22 may be arranged to extend vertically along the refrigeration chamber 201. The first side wall 22 is located on one side of the bottom wall 21, and the bottom of the first side wall 22 is connected to one side of the bottom wall 21.

[0065] like Figure 4 As shown, the refrigeration device may include a duct cover 3, which is disposed on the bottom wall 21. An evaporator 12 chamber is formed between the duct cover 3, the first side wall 22, and the bottom wall 21, and the evaporator 12 is disposed within the evaporator 12 chamber. The evaporator 12 chamber is connected to the refrigeration chamber 201. Since the refrigerant in the evaporator 12 can absorb heat from the surrounding medium during the vaporization process, it can cool the air in the evaporator 12 chamber and form low-temperature air in the evaporator 12 chamber. The low-temperature air is transported to the refrigeration chamber 201 to cool the refrigeration chamber 201.

[0066] Figure 5 for Figure 1A cross-sectional schematic diagram; Figure 6 for Figure 1 Another cross-sectional view; Figure 7 for Figure 6 A magnified view of part A.

[0067] like Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the duct cover 3 is spaced apart from the first sidewall 22 to form a first interval area 202. The first interval area 202 can extend along the side edge of the duct cover 3 near the first sidewall 22 and is connected to the refrigeration chamber 201. The first interval area 202 formed by the spaced-apart arrangement of the duct cover 3 and the first sidewall 22 can serve as a reserved duct path for return air. Since the first interval area 202 is located close to the sidewall of the refrigeration chamber 201, it is far from the main area where items are placed at the bottom of the refrigeration chamber 201, effectively reducing the possibility of items obstructing the first interval area 202.

[0068] The duct cover 3 is provided with a first return air inlet 301 facing the first partition area 202 on the side near the first side wall 22. The first partition area 202 connects the first return air inlet 301 with the cooling room 201.

[0069] The system features a first return air inlet 301 on the duct cover 3, facing the first side wall 22. The inlet 301 opens laterally or at an angle. Compared to existing upward-facing openings, the first return air inlet 301 is located near the side edge of the duct cover 3 close to the first side wall 22, thus horizontally offset from the main item placement area at the bottom of the refrigeration chamber 201. Furthermore, its orientation towards the first side wall 22 avoids direct placement on the bottom plane of the refrigeration chamber 201, effectively preventing items from directly covering or adhering to it, significantly reducing the risk of obstruction. During operation, air from the refrigeration chamber 201 flows downwards along the first side wall 22 into the first partition area 202, and then through the first return air inlet 301 into the evaporator 12 compartment.

[0070] In current air-cooled horizontal refrigerators, cold air is blown from the air inlet 602 into the cooling compartment 201 and then flows back to the evaporator 12 via the first return air inlet 301. Since users often place items directly at the bottom of the refrigerator, the return air inlet can easily be completely or partially blocked by these items.

[0071] In this application's technical solution, by spaced apart between the duct cover 3 and the first side wall 22, a first partition area 202 is formed, connecting the refrigeration chamber 201 and the evaporator 12 compartment. The first partition area 202 can serve as a hidden air vent, acting as the main area away from the bottom of the refrigeration chamber 201 where items are placed. Since the first return air vent 301 faces the first partition area 202 and is located between the duct cover 3 and the first side wall 22, even if items are placed on the duct cover 3, they will not directly block the first return air vent 301. This effectively reduces the risk of items obstructing the first partition area 202 and the first return air vent 301, facilitating the return of air from the refrigeration chamber 201 to the evaporator 12 compartment. This achieves an efficient return air process between the refrigeration chamber 201 and the evaporator 12 compartment, improving the refrigeration efficiency of the refrigeration unit. Compared to the technical solution of using shelving components to avoid obstructing the return air vent, this reduces manufacturing costs and improves the space utilization within the refrigeration chamber 201.

[0072] In some embodiments, the inner liner 2 may include a second sidewall 23. The second sidewall 23 and the first sidewall 22 may be disposed at a distance from each other, and the lower end of the second sidewall 23 is connected to the side of the bottom wall 21 away from the first sidewall 22. The first sidewall 22 and the second sidewall 23 are respectively disposed on opposite sides of the bottom wall 21.

[0073] like Figure 2 and Figure 6 As shown, in some embodiments, the refrigeration device may include an air supply housing 6, which is disposed on the second side wall 23. The air supply housing 6 may be spaced apart from the second side wall 23, and an air supply duct 601 is formed between the air supply housing 6 and the second side wall 23. The air supply duct 601 may extend along the height direction of the refrigeration chamber 201. The lower end of the air supply duct 601 is connected to the evaporator 12 compartment, and the upper end of the air supply housing 6 is provided with an air outlet 602. Air in the evaporator 12 compartment can be transported upward through the air supply duct 601 and blown into the refrigeration chamber 201 through the air outlet 602, and then flow back into the evaporator 12 compartment through the first partition area 202 and the first return air outlet 301.

[0074] Specifically, by placing the air supply housing 6 on the second side wall 23, an air supply duct 601 is formed on one side of the second side wall 23. The air supply duct 601 is connected to the evaporator 12 compartment, so that the cold air generated in the evaporator 12 compartment can be transported upward through the air supply port 602 to the refrigeration chamber 201. The cold air in the refrigeration chamber 201 naturally sinks and flows back to the evaporator 12 compartment through the first interval area 202 set near the first side wall 22. In this way, the airflow can be more comprehensively distributed in the entire refrigeration chamber 201, thereby forming a more stable convection circulation in the refrigeration chamber 201.

[0075] like Figure 6As shown, in some embodiments, the refrigeration device may include a refrigeration fan 61, which may be located in the evaporator 12 chamber or the air supply duct 601. The air supply port 602 is located at the air supply end of the refrigeration fan 61, and the first return air port 301 is located at the return air end of the refrigeration fan 61. When the refrigeration fan 61 is started, the air in the refrigeration chamber 201 can be sequentially transported into the evaporator 12 chamber through the first partition 202 and the first return air port 301, and then transported upward through the air supply duct 601, and finally transported into the refrigeration chamber 201 through the air supply port 602.

[0076] Figure 8 for Figure 2 A three-dimensional schematic diagram of the air duct cover.

[0077] like Figure 5 and Figure 7 As shown, in some embodiments, the duct cover 3 may include a duct top plate 31. The duct top plate 31 is disposed transversely above the bottom wall 21 along the refrigeration device, and the top surface of the duct top plate 31 may form a supporting surface for supporting items. The duct top plate 31 is spaced apart from the first sidewall 22 and forms the first interval area 202.

[0078] The duct cover 3 may include a duct side plate 32, which is disposed within the refrigeration chamber 201 along the height direction of the refrigeration unit. The duct side plate 32 extends downward from one side of the duct top plate 31. The duct side plate 32 and the duct top plate 31 may be connected at a 90° angle, and may form an L-shaped structure. The duct side plate 32 is disposed below the duct cover 3, with one side of the duct side plate 32 positioned close to the first sidewall 22.

[0079] The evaporator 12 compartment can be formed between the top plate 31 of the air duct, the side plate 32 of the air duct, the first side wall 22 and the bottom wall 21. The first return air inlet 301 is located on the side of the first side wall 22 and the top plate 31 of the air duct closer to the first side wall 22.

[0080] Specifically, the duct cover 3 is installed on the bottom wall 21, and the top plate 31 and the side plate 32 of the duct can be located between the first side wall 22 and the second side wall 23. The top plate 31 and the side plate 32 of the duct form a stepped structure on the bottom wall 21. The evaporator 12 compartment is formed between the bottom surface of the top plate 31, the side plate 32 of the duct, the bottom wall 21 and the first side wall 22, thus forming an area for the evaporator 12 to condense air.

[0081] The top plate 31 of the air duct is arranged at intervals with the first side wall 22 to form a first interval area 202, which allows air in the refrigeration chamber 201 to enter the first return air vent 301 through the first interval area 202. The first interval area 202 is located near the side edge of the refrigeration chamber 201. Even if some items are placed close to the first side wall 22 when the top plate 31 of the air duct is placed, the first interval area 202 can prevent the items from getting closer to the first return air vent 301, thereby reducing the possibility of partial obstruction. The air in the refrigeration chamber 201 can enter the first return air vent 301 more smoothly.

[0082] like Figure 3 As shown, in some embodiments, the first return air vent 301 can be arranged to extend along the length of the side edge of the duct top plate 31 near the first side wall 22. The duct top plate 31 can be provided with multiple first partition plates 33, which can be spaced apart along the length of the side edge of the duct top plate 31 near the first side wall 22. The first partition plates 33 divide the first return air vent 301 into multiple first sub-return air vents 3011, which helps to improve return air efficiency.

[0083] Figure 9 for Figure 2 A schematic diagram of the middle chamber.

[0084] like Figure 9 As shown, in some embodiments, the first sidewall 22 may be provided with an anti-shaking rib 4. The anti-shaking rib 4 extends along the height direction of the refrigeration device, and the lower end of the anti-shaking rib 4 extends to the first interval area 202.

[0085] Specifically, by protruding the anti-shaking rib 4 onto the surface of the first sidewall 22, with its lower end extending to the first partition area 202, the first sidewall 22 has a non-flat area. This non-flat area is distributed above the first partition area 202, preventing items placed near the first sidewall 22 from directly adhering to it and thus blocking the first partition area 202. Furthermore, by extending the anti-shaking rib 4 along the height direction of the refrigeration device, the anti-shaking rib 4 forms a continuous anti-shaking structure in vertical space. For taller or stacked items, the anti-shaking rib 4 can effectively prevent them from blocking the top of the first partition area 202 in the height direction.

[0086] like Figure 3 and Figure 9 As shown, in some embodiments, multiple anti-shading ribs 4 may be provided, and the multiple anti-shading ribs 4 are arranged at intervals. A return air gap 401 is formed between two adjacent anti-shading ribs 4, and the lower end of the return air gap 401 is connected to the first interval area 202.

[0087] In actual use, users may place items near the first side wall 22 of the refrigeration chamber 201, which could easily obstruct the first partition area 202. By arranging multiple anti-obstruction ribs 4 at intervals, and forming a return air gap 401 between any adjacent anti-obstruction ribs 4, the vertical structure of the anti-obstruction ribs 4 can create spatial interference with the placement of items, making it difficult for large items to completely adhere to the first side wall 22, thereby avoiding the formation of a continuous surface that obstructs the entire return air area. Moreover, the return air gaps 401 formed by the multiple anti-obstruction ribs 4 are arranged at intervals. Even if some return air gaps 401 are unusable due to obstruction by items, the other unobstructed return air gaps 401 can still serve as airflow channels to compensate for the return air, thereby ensuring that the air in the refrigeration chamber 201 can be effectively returned to the evaporator 12 compartment.

[0088] In this way, even if an item is placed on the top plate 31 of the air duct near the first side wall 22, and the item partially blocks the first partition area 202, the air in the refrigeration chamber 201 can still flow down along the return air gap 401 formed between the first side wall 22 and the multiple anti-blocking ribs 4 to the first partition area 202, and then flow to the evaporator 12 compartment through the first return air vent 301.

[0089] In some embodiments, the anti-shaking rib 4 may be elongated, and the length direction of the anti-shaking rib 4 extends along the height direction of the refrigeration device. A return air gap 401 may be formed between multiple elongated anti-shaking ribs 4. It should be noted that the anti-shaking rib 4 may extend in an inclined upward direction or in a vertical upward direction, and there is no limitation on this.

[0090] In some embodiments, the anti-shaking ribs 4 may be in the form of raised blocks, and the raised blocks of the anti-shaking ribs 4 may be distributed at intervals along the height direction of the first sidewall 22, and a plurality of anti-shaking ribs 4 may be distributed at intervals along the lateral direction of the first sidewall 22.

[0091] In some other embodiments, the surface of the first sidewall 22 can be configured as an uneven plane. On the one hand, this can prevent items from being placed on the top plate 31 of the air duct and directly and tightly adhering to the surface of the first sidewall 22, thus blocking the first interval area 202. On the other hand, the surface of the first sidewall 22 can also form a return air gap 401, so that the airflow of the refrigeration chamber 201 can still flow to the first interval through the return air gap 401, and then enter the evaporator 12 chamber through the first return air inlet 301.

[0092] like Figure 8As shown, in some embodiments, a support cover 34 may be provided protruding from the top surface of the duct top plate 31. The support cover 34 may be disposed adjacent to and spaced apart from the first sidewall 22. One end of the support cover 34 may be connected to the top surface of the duct top plate 31, and the other end of the support cover 34 may be disposed away from the top surface of the duct top plate 31 and arranged vertically spaced apart from the top surface of the duct top plate 31. A first return air inlet 301 is provided below the support cover 34 on the side facing the first sidewall 22.

[0093] Specifically, the support cover 34 is raised above the top surface of the air duct top plate 31, thus forming a partially raised structure. In this way, the raised support cover 34 makes it difficult for the item to completely fit against the top surface of the air duct cover 3 when it is placed on top of the air duct cover 3. At the same time, it also helps to form more return air space between the item and the first side wall 22, reducing the obstruction of the return air path by the item.

[0094] Furthermore, the first return air vent 301 is formed below the support cover 34, facing the first side wall 22. This arrangement prevents the first return air vent 301 from being directly exposed on the supporting surface of the duct top plate 31, reducing the risk of it being blocked by objects. Simultaneously, the first return air vent 301 is higher than the top surface of the duct top plate 31, facilitating more efficient and rapid return of air from the refrigeration compartment 201 to the evaporator 12 chamber through the side-opening first return air vent 301.

[0095] In some embodiments, the support cover 34 extends obliquely toward the first sidewall 22 in an upward direction. Compared to a horizontal protrusion or a vertical plate-like structure, since the support cover 34 is oblique toward the first sidewall 22, it is more difficult for items placed on the top plate 31 of the air duct to be directly pressed against the air return vent, thus further improving the anti-blocking performance.

[0096] In some embodiments, the top surface of the support cover 34 may be configured as an arc surface that extends upward at an angle toward the first sidewall 22.

[0097] like Figure 8 As shown, in some embodiments, multiple support covers 34 can be provided, and multiple support covers 34 are arranged at intervals on the top plate 31 of the air duct, thereby forming multiple first return air inlets 301. Specifically, the first return air inlets 301 arranged at intervals adjacent to the first sidewall 22 are connected to the first interval area 202, and the first return air inlets 301 formed on the support covers 34 far away from the first sidewall 22 can be directly connected to the refrigeration chamber 201, so that the air in the refrigeration chamber 201 can be more efficiently returned to the evaporator 12 chamber directly through the first return air inlets 301.

[0098] Figure 10 for Figure 9Another cross-sectional schematic diagram.

[0099] like Figure 10 As shown, in some embodiments, the duct side panel 32 can be spaced apart from the first side wall 22 to form a second partition area 203. The second partition area 203 can extend vertically along the first side wall 22 and communicates with the refrigeration chamber 201. The second partition area 203 formed by the spaced-apart arrangement of the duct side panel 32 and the first side wall 22 can serve as a reserved duct path for return air. Since the second partition area 203 is located close to the side wall of the refrigeration chamber 201, it is far from the main area where items are placed at the bottom of the refrigeration chamber 201, effectively reducing the possibility of items obstructing the second partition area 203.

[0100] The side of the air duct side plate 32 closest to the first side wall 22 facing the second partition zone 203 may be provided with a second return air inlet 302, which connects the second partition zone 203 and the evaporator 12 compartment. Air in the refrigeration chamber 201 can flow through the second partition zone 203 to the second return air inlet 302 and then enter the evaporator 12 compartment.

[0101] Specifically, by providing a second return air vent 302 on the duct side plate 32 facing the first side wall 22, and the opening direction of the second return air vent 302 being either sideways or obliquely open, on the one hand, the arrangement of the second return air vent 302 is offset from the main item placement area at the bottom of the refrigeration chamber 201, and the second return air vent 302 is set towards the first side wall 22. This avoids the second return air vent 302 being directly set on the bottom plane of the refrigeration chamber 201, thus effectively preventing items from directly covering or pressing against the first return air vent 301, and greatly reducing the risk of being blocked by items. On the other hand, the second return air vent 302 is located on the duct side plate 32, and its distribution position is staggered from the first return air vent 301, which is conducive to guiding cold air from different areas back to the evaporator 12 chamber, thereby increasing the amount of return air flowing from the refrigeration chamber 201 to the evaporator 12 chamber, further improving the return air efficiency of the refrigeration unit, and thus achieving a good cooling effect.

[0102] like Figure 8 As shown, in some embodiments, the second return air vent 302 can be arranged to extend along the height direction of the side edge of the duct side plate 32 near the first side wall 22. The duct side plate 32 can be provided with multiple second partition plates 35, which can be spaced apart along the height direction of the side edge of the duct side plate 32 near the first side wall 22. The second partition plates 35 divide the second return air vent 302 into multiple second sub-return air vents 3021, which helps to improve return air efficiency.

[0103] like Figure 3As shown, in some embodiments, the first partition region 202 may extend along the side edge of the bottom wall 21 near the first side wall 22. The second partition region 203 may extend along the height direction of the refrigeration device, and the upper end of the second partition region 203 is connected to one end of the first partition region 202. Specifically, the distribution of the first partition region 202 and the second partition region 203 may be L-shaped.

[0104] Specifically, by arranging alternating first and second interval zones 202 and 203 between the duct cover 3 and the first side wall 22, the return air efficiency of different areas within the refrigeration chamber 201 is improved. The second interval zone 203 is arranged along the height direction and located on the side of the duct side plate 32 closest to the first side wall 22. This does not affect the placement space of items within the refrigeration chamber, and the first and second interval zones 202 and 203 can serve as concealed return air vents, ensuring sufficient return air volume within the refrigeration chamber 201. Furthermore, the upper end of the second partition 203 is connected to the first partition 202, and the connection between the second partition 203 and the first partition 202 is located at a corner, where it is difficult to be blocked by objects. Even if the objects on the top plate 31 of the air duct block the first partition 202 or the second partition 203, the air in the refrigeration chamber 201 can still enter the first return air vent 301 or the second return air vent 302 through the connection between the first partition 202 and the second partition 203.

[0105] It should be noted that in some other embodiments, the second interval region 203 may not be connected to the first interval region 202.

[0106] like Figure 8 As shown, in some embodiments, the duct side plate 32 may be provided with a third return air inlet 303, which connects the refrigeration chamber 201 and the evaporator 12 compartment. The addition of the third return air inlet 303 can effectively increase the return air volume of the evaporator 12 compartment. Furthermore, the opening direction of the third return air inlet 303 is different from the opening positions of the first return air inlet 301 and the second return air inlet 302, which can further increase the multi-angle airflow return paths within the refrigeration chamber 201.

[0107] A raised rib 36 may be provided on the side of the duct side plate 32 away from the evaporator 12 compartment. The raised rib 36 may be provided in a raised manner relative to the surface of the duct side plate 32 away from the evaporator 12 compartment. Multiple raised ribs 36 are provided and arranged at intervals. The third return air outlet 303 may be located between two adjacent raised ribs 36. The third return air outlet 303 connects the refrigeration compartment 201 and the evaporator 12 compartment.

[0108] Specifically, when a user places an item in the refrigeration compartment 201 near the air duct side panel 32, multiple ribs 36 are spaced apart on the side of the air duct side panel 32 away from the evaporator 12 compartment, and the third return air vent 303 is formed between two adjacent ribs 36. The ribs 36 can effectively separate the item placed on one side of the air duct side panel 32 from the third return air vent 303, thereby preventing the item placed on one side of the air duct side panel 32 from directly blocking the third return air vent 303, and avoiding the situation where the item completely covers the third return air vent 303, resulting in poor air return.

[0109] like Figure 8 As shown, in some embodiments, the number of third return air vents 303 can be set to multiple, and multiple third return air vents 303 are distributed on the side of the air duct side plate 32 near the first side wall 22.

[0110] like Figure 8 As shown, in some embodiments, the number of third return air vents 303 can be multiple. Some of the third return air vents 303 can be formed between two adjacent ribs 36, and some of the third return air vents 303 can be formed on the duct side plate 32 and spaced between the ribs 36.

[0111] like Figure 10 As shown, in some embodiments, the refrigeration device may include a heat insulation component 5, which is disposed in the evaporator 12 compartment. The heat insulation component 5 may be disposed between the evaporator 12 and the air duct cover plate 3. The heat insulation component 5 can provide heat insulation for the evaporator 12, thereby reducing the energy consumption of the refrigeration device.

[0112] like Figure 10 As shown, in some embodiments, the insulation component 5 may include a first insulation part 51, which covers the top of the evaporator 12. The first insulation part 51 is located between the top plate 31 of the air duct and the top of the evaporator 12, which can reduce the transfer of cold energy from the top of the condenser.

[0113] The insulation component 5 may include a second insulation section 52, which covers one side of the evaporator 12 and is located between the air duct side plate 32 and the evaporator 12, thereby reducing the transfer of cold energy from the condenser to the side. By providing the first insulation section 51 and the second insulation section 52, the conduction and loss of cold energy generated during the operation of the evaporator 12 towards the air duct top plate 31 and the air duct side plate 32 can be effectively reduced.

[0114] In some embodiments, the side of the first insulation part 51 near the first sidewall 22 may be spaced apart from the first sidewall 22 to form a first space 204, which connects the first return air vent 301 and the evaporator 12 compartment.

[0115] The second insulation part 52 can be spaced apart from the first side wall 22 on the side closest to the first side wall 22, forming a second space 205. The second space 205 connects the second return air vent 302 and the evaporator 12 compartment. The first space 204 and the second space 205 can be connected.

[0116] Specifically, the first insulation part 51 is spaced apart from the first side wall 22 to form a first interval space 204. The first interval space 204 connects the first return air inlet 301 and the evaporator 12 compartment, thereby preventing the first insulation part 51 from occupying the return air path. While achieving a good insulation effect on the evaporator 12, the first insulation part 51 allows the airflow entering the first return air inlet 301 to flow smoothly back into the first interval space 204.

[0117] The second insulation section 52, located near the first sidewall 22, forms a second space 205 with the first sidewall 22. The second space 205 connects the second return air inlet 302 and the evaporator 12 chamber. This prevents the second insulation section 52 from occupying the return air path. While achieving good insulation for the evaporator 12, the second insulation section 52 allows the airflow entering the second return air inlet 302 to flow smoothly back into the first space 204, thereby enabling the cold air to smoothly enter the evaporator 12 chamber and exchange heat with the evaporator 12, improving the return air efficiency and accelerating the refrigeration cycle.

[0118] like Figure 3 and Figure 9 As shown, in some embodiments, the bottom wall 21 may include a first stepped wall 211, which is arranged laterally along the refrigeration device. The first stepped wall 211 is located on the side of the top plate 31 away from the side plate 32 of the duct, and is connected to the end of the duct cover plate 3 away from the side plate 32 of the duct. The top plate 31 of the duct may be on the same plane as the first stepped wall 211, thereby forming a supporting surface for the bottom of the refrigeration chamber 201.

[0119] like Figure 10 As shown, the bottom wall 21 may include a second stepped wall 212. The second stepped wall 212 extends downward from the side of the first stepped wall 211 near the top plate 31 of the air duct. The second stepped wall 212 can extend along the height direction of the refrigeration room 201, and the second stepped wall 212 can be provided at intervals on the side of the return air facing the top plate 31 of the air duct.

[0120] like Figure 6As shown, the bottom wall 21 may include a third stepped wall 213. The third stepped wall 213 is spaced below the top plate 31 of the air duct. The third stepped wall 213 is bent and extended from the lower end of the second stepped wall 212 toward the side of the air duct side plate 32. The side of the third stepped wall 213 away from the second stepped wall 212 can abut against the lower end of the air duct side plate 32.

[0121] The second step wall 212, the third step wall 213, the top plate of the air duct 31, and the side plate of the air duct 32 enclose the evaporator 12 compartment.

[0122] Specifically, the second stepped wall 212, the third stepped wall 213, the top plate of the air duct 31, and the side plate of the air duct 32 enclose and form the evaporator 12 compartment, thus creating a relatively independent installation space for the evaporator 12, allowing the evaporator 12 to be rationally arranged within it. The first stepped wall 211, the second stepped wall 212, and the third stepped wall 213 constitute the stepped structure of the bottom wall 21. This stepped structure of the bottom wall 21, together with the top plate of the air duct 31 and the side plate of the air duct 32, can enclose the evaporator 12 compartment, thereby increasing the connection points and contact area between the bottom wall 21 and the air duct cover plate 3, making the connection between the bottom wall 21 and the top plate of the air duct 31 and the side plate of the air duct 32 more robust and stable.

[0123] like Figure 10 As shown, in some embodiments, a compressor compartment 101 may be provided on the side of the first step wall 211 and the second step wall 212 away from the refrigeration chamber 201, and a compressor 13, a condenser and other refrigeration structures may be provided in the compressor compartment 101.

[0124] The refrigeration device may include a drain pipe 14, one end of which may be connected to the evaporator compartment 202, and the other end of which may extend into the compressor compartment 101 and be positioned above the water receiving tray 15, thereby draining the condensate in the evaporator compartment 202 into the water receiving tray 15 for evaporation.

[0125] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of this application is limited only by the appended claims.

Claims

1. A refrigeration apparatus, characterized by comprising: include: The housing constitutes the outer shell of the refrigeration device; A liner is disposed inside the box. The liner has a refrigeration chamber. The liner has a bottom wall and a first side wall. The first side wall is disposed on one side of the bottom wall. The bottom of the first side wall is connected to one side of the bottom wall. An air duct cover is installed above the bottom wall, and an evaporator compartment is formed between the air duct cover, the first side wall, and one side of the bottom wall; An evaporator is located inside the evaporator compartment; The duct cover is arranged at intervals with the first sidewall to form a first interval area. The side of the duct cover closest to the first sidewall is provided with a first return air inlet that faces the first interval area. The first interval area connects the first return air inlet with the refrigeration chamber.

2. The refrigeration device according to claim 1, characterized in that, The duct cover plate includes: The top plate of the air duct is arranged horizontally above the bottom wall along the lateral direction of the refrigeration device; The air duct side plate is installed in the refrigeration room along the height direction of the refrigeration device, and the air duct side plate extends downward from one side of the air duct top plate. The evaporator compartment is formed between the top plate of the air duct, the side plate of the air duct, the first side wall and the bottom wall; The top plate of the air duct is arranged at intervals with the first sidewall to form the first interval area, and the first return air outlet is located on the side of the first sidewall and the top plate of the air duct near the first sidewall.

3. The refrigeration device according to claim 2, characterized in that, The first sidewall is provided with an anti-shaking rib, which extends along the height direction of the refrigeration device, and the lower end of the anti-shaking rib extends to the first interval area. The anti-shading ribs are provided in multiples, and the multiple anti-shading ribs are arranged at intervals. A return air gap is formed between two adjacent anti-shading ribs, and the lower end of the return air gap is connected to the first interval area.

4. The refrigeration device according to claim 2, characterized in that, The top surface of the duct top plate is provided with a support cover, and the first return air inlet is provided on the side of the support cover facing the first side wall.

5. The refrigeration device according to claim 2, characterized in that, The air duct side plate is arranged at a distance from the first side wall to form a second interval area, and the second interval area is connected to the refrigeration chamber. The side of the air duct plate near the first side wall is provided with a second return air inlet facing the second interval area, and the second return air inlet connects the second interval area and the evaporator compartment.

6. The refrigeration device according to claim 5, characterized in that, The first interval region extends along the side edge of the bottom wall near the first side wall; The second interval extends along the height direction of the refrigeration device, and the upper end of the second interval is connected to one end of the first interval.

7. The refrigeration device according to claim 2, characterized in that, The side plate of the air duct away from the evaporator compartment is provided with a rib, and there are multiple ribs arranged at intervals. The side plate of the air duct is provided with a third return air inlet, which is located between two adjacent ribs and connects the refrigeration chamber and the evaporator compartment.

8. The refrigeration device according to claim 5, characterized in that, The refrigeration device further includes a heat insulation component, which is disposed within the evaporator compartment. The heat insulation component comprises: A first insulation section covers the top of the evaporator, and the first insulation section is located between the top plate of the air duct and the top of the evaporator; The second insulation section covers one side of the evaporator and is located between the air duct side plate and the evaporator. The first insulation part is spaced apart from the first sidewall on the side closest to the first sidewall, forming a first gap space, which connects the first return air vent and the evaporator compartment. The second insulation part is spaced apart from the first sidewall on the side closest to the first sidewall, forming a second space, which connects the second return air inlet and the evaporator compartment.

9. The refrigeration device according to claim 2, characterized in that, The bottom wall includes: The first step wall is arranged transversely along the refrigeration device, and the first step wall is located on the side of the top plate of the air duct away from the side plate of the air duct; The second step wall extends downward from the side of the first step wall near the top plate of the air duct; The third step wall is spaced below the top plate of the air duct, and the third step wall extends from the lower end of the second step wall toward one side of the air duct side plate. The second step wall, the third step wall, the top plate of the air duct, and the side plate of the air duct together form the evaporator compartment.

10. The refrigeration device according to claim 1, characterized in that, The box liner also includes a second sidewall, which is disposed opposite to the first sidewall, and the lower end of the second sidewall is connected to the side of the bottom wall away from the first sidewall; The refrigeration device further includes an air supply housing, which is disposed on the second side wall. An air supply duct is formed between the air supply housing and the second side wall. The air supply duct extends along the height direction of the refrigeration chamber. The lower end of the air supply duct is connected to the evaporator compartment. An air outlet is provided at the upper end of the air supply housing. The air inside the evaporator compartment can be transported upward through the air supply duct and blown into the refrigeration room through the air supply outlet, and then flow back into the evaporator compartment through the first interval area and the first return air outlet.

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