Air duct assembly and refrigerator

Abstract

This application discloses an air duct assembly and a refrigerator. The air duct assembly includes: a main air duct plate with an air inlet; an air duct surround plate disposed on the main air duct plate and surrounding the air inlet, the air duct surround plate and the main air duct plate enclosing each other to form an air cavity, the air cavity having an opening opposite to the air inlet; an air duct cover plate covering the opening, with the outer edge of the air duct cover plate coinciding with the outer edge of the opening, the air duct cover plate having a first air outlet; and a fan disposed within the air cavity. Since the main air duct plate and the air duct surround plate enclose the air cavity with the opening, and the air duct cover plate covers the opening, the main air duct plate, the air duct surround plate, and the air duct cover plate together form a complete air supply duct with an air inlet and a first air outlet. Because the outer edge of the air duct cover plate coincides with the outer edge of the opening, the air duct cover plate essentially has no portion not used to form the air supply duct, reducing the volume occupied by the air duct cover plate, enabling overall miniaturization of the air duct assembly, thereby increasing the volume ratio of the refrigerator.

Description

Technical Field

[0001] This application belongs to the field of refrigeration equipment technology, specifically relating to air duct components and refrigerators. Background Technology

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature, and it is also a product that keeps food or other items at a constant low temperature. In the existing technology, the air duct structure of a refrigerator generally consists of an air duct cover and a fan. The air duct structure is laid flat on the back of the refrigerator compartment. The air duct structure in the refrigerator is relatively large. This type of air duct structure occupies a lot of refrigerator volume, which is not conducive to increasing the refrigerator's volume ratio. Summary of the Invention

[0003] This application provides an air duct assembly and a refrigerator to solve the technical problem that the air duct assembly is large in size and occupies a lot of refrigerator volume.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: a duct assembly, comprising: a main duct plate having an air inlet; a duct surround plate disposed on the main duct plate and surrounding the air inlet, the duct surround plate and the main duct plate enclosing each other to form an air cavity, the air cavity having an opening opposite to the air inlet; a duct cover plate covering the opening, the outer edge of the duct cover plate coinciding with the outer edge of the opening, the duct cover plate having a first air outlet; and a fan disposed within the air cavity.

[0005] According to one embodiment of this application, the main air duct plate includes a top wall and a bottom wall disposed opposite to each other, and a side wall and a rear wall connecting the top wall and the bottom wall. The air duct enclosure is spaced apart from the side wall and / or the bottom wall, and a second air outlet is formed on the air duct enclosure.

[0006] According to one embodiment of this application, the duct enclosure is arc-shaped.

[0007] According to one embodiment of this application, the duct enclosure is integrally formed with the main duct plate.

[0008] According to one embodiment of this application, a snap-fit ​​portion is formed on the main air duct plate and / or the air duct enclosure plate, and a corresponding snap-fit ​​portion is formed on the air duct cover plate, wherein the snap-fit ​​portion cooperates with the snap-fit ​​portion for fixation.

[0009] According to one embodiment of this application, the fan is disposed on the main air duct plate, and the air inlet of the fan is correspondingly disposed to the air outlet.

[0010] According to one embodiment of this application, it includes: a first air guide strip disposed at the first air outlet.

[0011] According to one embodiment of this application, it includes: a second air guide strip disposed at the second air outlet.

[0012] According to one embodiment of this application, it includes: a return air cover plate disposed at the bottom of the main air duct plate, the return air cover plate forming a return air duct communicating with the air inlet.

[0013] According to one embodiment of this application, it includes: a drainage hole disposed at the bottom of the main air duct plate; and a guide rib disposed on the main air duct plate and extending toward the drainage hole.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in this application is: a refrigerator, including the air duct assembly as described above.

[0015] The beneficial effects of this application are as follows: Since the main air duct plate and the air duct enclosure plate form an open air cavity, and the air duct cover plate is placed over the open cavity, the main air duct plate, the air duct enclosure plate, and the air duct cover plate together form a complete air supply duct with an air inlet and a first air outlet. Because the outer edge of the air duct cover plate coincides with the outer edge of the open cavity, the air duct cover plate essentially has no portion not used to form the air supply duct, reducing the volume occupied by the air duct cover plate and enabling overall miniaturization of the air duct assembly, thereby increasing the refrigerator's volumetric efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the air duct component of this application from one perspective.

[0018] Figure 2 This is a three-dimensional structural schematic diagram of another embodiment of the air duct component of this application;

[0019] Figure 3 This is an exploded structural diagram of an embodiment of the air duct assembly of this application.

[0020] In the diagram: 100, air duct assembly; 110, main air duct plate; 111, air inlet; 112, top wall; 113, side wall; 114, bottom wall; 115, rear wall; 120, air duct enclosure; 121, air cavity; 122, opening; 123, second air outlet; 130, air duct cover plate; 131, first air outlet; 1311, first air guide strip; 132, snap-fit ​​part; 140, fan; 141, air inlet; 150, return air cover plate; 161, drain hole; 162, guide rib. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] Please see Figures 1 to 3 , Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the air duct component of this application from one perspective. Figure 2 This is a three-dimensional structural schematic diagram of another embodiment of the air duct component of this application; Figure 3 This is an exploded structural diagram of an embodiment of the air duct assembly of this application.

[0024] One embodiment of this application provides a duct assembly 100, such as Figures 1 to 3 As shown, the system includes a main air duct plate 110, an air duct surround plate 120, an air duct cover plate 130, and a fan 140. The main air duct plate 110 has an air inlet 111. The air duct surround plate 120 is disposed on the main air duct plate 110 and surrounds the air inlet 111. The air duct surround plate 120 and the main air duct plate 110 enclose each other to form an air cavity 121, which has an opening 122 opposite to the air inlet 111. The air duct cover plate 130 covers the opening 122, with the outer edge of the air duct cover plate 130 coinciding with the outer edge of the opening 122. A first air outlet 131 is formed on the air duct cover plate 130. The fan 140 provides power for the circulation of cooling air in the air cavity 121. When the fan 140 is working, the cooling air from the air duct assembly 100 is blown into the air cavity 121 from the air inlet 111 and blown out from the first air outlet 131 into the refrigerator compartment.

[0025] As can be seen from the above structure, the main air duct plate 110 and the air duct enclosure plate 120 of this application enclose to form an air cavity 121 with an opening 122. The air duct cover plate 130 is placed on the opening 122. The main air duct plate 110, the air duct enclosure plate 120 and the air duct cover plate 130 enclose to form a complete air supply duct with an air inlet 111 and a first air outlet 131. Since the outer edge of the air duct cover plate 130 coincides with the outer edge of the opening 122, the air duct cover plate 130 basically has no part that is not used to form the air supply duct. By reducing the volume occupied by the air duct cover plate 130, the overall miniaturization of the air duct assembly 100 can be achieved, thereby improving the volume ratio of the refrigerator.

[0026] It should be noted that the overlap between the outer edge of the duct cover 130 and the outer edge of the opening 122 does not mean that they are completely overlapped. For example, the outer edge of the duct cover 130 may protrude slightly beyond the outer edge of the duct enclosure 120 that forms the opening 122. As long as the duct cover 130 basically does not have any part that is not used to form the air supply duct, the volume occupied by the duct cover 130 can be reduced.

[0027] Among them, such as Figure 1 and Figure 3 As shown, the first air outlet 131 can be set on the upper part of the air duct cover 130, so that the air outlet position of the first air outlet 131 is higher. After the cooling air enters the refrigerator compartment from the first air outlet 131, it can flow from the high point to the low point in the refrigerator compartment, and the air outlet in the refrigerator compartment is more uniform.

[0028] like Figure 1 As shown, a first air guide strip 1311 can also be provided on the first air outlet 131. The first air guide strip 1311 can guide the cooling air flowing out of the first air outlet 131 to the required position according to the air outlet requirements of the refrigerator compartment. Specifically, multiple first air guide strips 1311 can be arranged at intervals along the length of the first air outlet 131. The orientation of different first air guide strips 1311 can be the same or different, so as to guide the cooling air flowing out of the first air outlet 131 to different positions in the refrigerator compartment, which is beneficial to the uniformity of air outlet in the refrigerator compartment and improves the cooling efficiency.

[0029] In some embodiments, such as Figure 3As shown, the main air duct plate 110 includes a top wall 112 and a bottom wall 114 disposed opposite to each other, and side walls 113 and a rear wall 115 connecting the top wall 112 and the bottom wall 114. Since the air outlet of the refrigerator compartment is usually located at a high position, in order to reduce the volume of the air cavity 121 formed by the air duct enclosure plate 120 and the main air duct plate 110, the side walls 113 and / or the bottom wall 114 of the air duct enclosure plate 120 and the main air duct plate 110 are spaced apart. This results in a smaller volume of the air cavity 121 formed by the air duct enclosure plate 120 and the main air duct plate 110, and the space between the side walls 113 and / or the bottom wall 114 of the air duct enclosure plate 120 and the main air duct plate 110 can be used to increase the volume of the refrigerator compartment. In other embodiments, according to the refrigerator structural design, the air duct enclosure plate 120 may also be spaced apart from the top wall 112 of the main air duct plate 110.

[0030] In addition, such as Figure 1 and Figure 3 As shown, the space between the side wall 113 and / or bottom wall 114 of the air duct enclosure 120 and the main air duct plate 110 allows cooling air to flow through. To improve air outlet efficiency, a second air outlet 123 is formed on the air duct enclosure 120. The second air outlet 123 is located differently from the first air outlet 131, which can improve the air outlet efficiency of the air duct assembly 100 and improve the air outlet uniformity in the refrigerator compartment, resulting in a more even temperature distribution inside the refrigerator compartment. A second air guide strip (not shown in the figure) can also be provided on the second air outlet 123. The second air guide strip can guide the cooling air flowing out of the second air outlet 123 to the required position according to the air outlet demand in the refrigerator compartment. Specifically, multiple second air guide strips can be spaced apart along the length of the second air outlet 123. The orientation of different second air guide strips can be the same or different, so as to guide the cooling air flowing out through the second air outlet 123 to different positions in the refrigerator compartment, increase the air volume, improve the uniformity of air outlet in the refrigerator compartment, and improve the cooling efficiency; and also avoid the risk of the first air outlet 131 being blocked.

[0031] In one specific implementation, such as Figure 1 and Figure 3 As shown, the duct enclosure 120 can be spaced apart from the side walls 113 and bottom walls 114 of the main duct plate 110, that is, the duct enclosure 120 and the top wall 112 of the main duct plate 110 enclose each other to form an air cavity 121. It should be noted that, at this time, the duct enclosure 120 does not need to enclose the entire top wall 112 of the main duct plate 110 to form an air cavity 121; the duct enclosure 120 can form an air cavity 121 with only a portion of the top wall 112 of the main duct plate 110. For example, the duct enclosure 120 can be arc-shaped, with the second air outlet 123 blowing air towards the side walls 113 and bottom walls 114 of the main duct plate 110, resulting in higher air outlet efficiency and more uniform airflow of the duct assembly 100.

[0032] In another specific embodiment, the duct enclosure 120 can be spaced apart from the bottom wall 114 of the main duct plate 110, that is, the duct enclosure 120, together with the top wall 112 and side wall 113 of the main duct plate 110, forms an air cavity 121. It should be noted that, in this case, the duct enclosure 120 does not need to completely enclose the top wall 112 and side wall 113 of the main duct plate 110 to form the air cavity 121; the duct enclosure 120 can form the air cavity 121 with only a portion of the top wall 112 and side wall 113 of the main duct plate 110. For example, the duct enclosure 120 can be arranged relatively parallel to the top wall 112, with the second air outlet 123 blowing air towards the bottom wall 114 of the main duct plate 110.

[0033] In another specific embodiment, the duct enclosure 120 can be spaced apart from the side wall 113 of the main duct plate 110, that is, the duct enclosure 120 and the top wall 112 and bottom wall 114 of the main duct plate 110 enclose each other to form an air cavity 121. It should be noted that, in this case, the duct enclosure 120 does not need to enclose all the top wall 112 and bottom wall 114 of the main duct plate 110 to form an air cavity 121; the duct enclosure 120 can form an air cavity 121 with only a portion of the top wall 112 and bottom wall 114 of the main duct plate 110. For example, the duct enclosure 120 can be vertically arranged, with the second air outlet 123 blowing air towards the side wall 113 of the main duct plate 110.

[0034] To stabilize the fixed fan 140, such as Figure 2 As shown, the fan 140 is mounted on the main air duct plate 110. The air inlet 141 of the fan 140 corresponds to the air outlet 111. When the fan 140 operates, it draws cooling air into the air inlet 111 and blows it into the air chamber 121 from the air outlet. The air in the air chamber 121 is then blown out from the first air outlet 131 and the second air outlet 123, thereby delivering air to the refrigerator compartment. Since the main air duct plate 110 is the main structure of the air duct assembly 100, mounting the fan 140 on the main air duct plate 110 helps to support the weight of the fan 140 and ensures the stability of its operation. Of course, in other embodiments, the fan 140 can also be mounted on the air duct enclosure 120 or the air duct cover 130, as long as the air inlet 141 of the fan 140 corresponds to the air outlet 111; this is not a limitation.

[0035] To reduce the number of parts and facilitate manufacturing and assembly, such as Figure 2 As shown, the duct enclosure 120 and the main duct plate 110 are integrally formed, so the duct assembly 100 can be assembled simply by installing the fan 140 inside the air cavity 121 and setting the duct cover plate 130 at the opening 122 on the air cavity 121. The structure is simple and the installation is convenient.

[0036] Furthermore, such as Figure 1 and Figure 3As shown, a snap-fit ​​portion (not shown in the figure) is formed on the main air duct plate 110 and / or the air duct enclosure plate 120, and a corresponding snap-fit ​​portion 132 is formed on the air duct cover plate 130. The snap-fit ​​portion 132 and the snap-fit ​​portion cooperate to fix the air duct cover plate 130, so that the air duct cover plate 130 can be fixed at the opening 122 of the air cavity 121, and the outer edge of the air duct cover plate 130 coincides with the outer edge of the opening 122.

[0037] Since the area of ​​the main air duct plate 110 without an air cavity 121 is used to increase the volume of the refrigerator compartment, in some embodiments, such as Figure 1 As shown, the area of ​​the main air duct plate 110 without the air cavity 121 directly forms the back panel of the refrigerator compartment. When the refrigerator compartment door is opened to take out or put in items, hot and humid air from outside enters the refrigerator compartment. Because the temperature of the main air duct plate 110 is relatively low, the hot and humid air easily condenses on the main air duct plate 110. The air duct assembly 100 includes a drain hole 161, which is located at the bottom of the main air duct plate 110. Condensate flows down the main air duct plate 110 and out through the drain hole 161, which can reduce water accumulation in the refrigerator compartment.

[0038] Furthermore, such as Figure 1 As shown, the air duct assembly 100 also includes guide ribs 162, which are disposed on the main air duct plate 110 and extend toward the drain hole 161. Condensate can be guided by the guide ribs 162 and then collected toward the drain hole 161, and discharged through the drain hole 161, thus preventing condensate from accumulating at the bottom of the main air duct plate 110 and being difficult to discharge from the drain hole 161.

[0039] In some embodiments, such as Figure 1 As shown, the air duct assembly 100 also includes a return air cover 150, which is disposed at the bottom of the main air duct plate 110, forming a return air duct that communicates with the air inlet 111. Air from the refrigerator compartment enters the evaporator through the return air duct, is cooled by the evaporator, and then re-enters the air cavity 121 through the air inlet 111, eventually entering the refrigerator compartment. Specifically, the return air cover 150 is integrally formed with the main air duct plate 110.

[0040] Please continue reading. Figures 1 to 3Another embodiment of this application provides a refrigerator (not shown in the figure), including the air duct assembly 100 and refrigerator compartment (not shown in the figure) of any of the above embodiments. The air duct assembly 100 includes a main air duct plate 110, an air duct surround plate 120, an air duct cover plate 130, and a fan 140. The main air duct plate 110 has an air inlet 111. The air duct surround plate 120 is disposed on the main air duct plate 110 and surrounds the air inlet 111. The air duct surround plate 120 and the main air duct plate 110 enclose each other to form an air cavity 121, which has an opening 122 opposite to the air inlet 111. The air duct cover plate 130 covers the opening 122, and the outer edge of the air duct cover plate 130 coincides with the outer edge of the opening 122. A first air outlet 131 is formed on the air duct cover plate 130. The fan 140 provides power for the circulation of cooling air in the air cavity 121. When the fan 140 is working, the cooling air from the air duct assembly 100 is blown into the air cavity 121 from the air inlet 111 and blown out from the first air outlet 131 into the refrigerator compartment.

[0041] As can be seen from the above structure, the main air duct plate 110 and the air duct enclosure plate 120 of this application enclose to form an air cavity 121 with an opening 122. The air duct cover plate 130 is placed on the opening 122. The main air duct plate 110, the air duct enclosure plate 120 and the air duct cover plate 130 enclose to form a complete air supply duct with an air inlet 111 and a first air outlet 131. Since the outer edge of the air duct cover plate 130 coincides with the outer edge of the opening 122, the air duct cover plate 130 basically has no part that is not used to form the air supply duct. By reducing the volume occupied by the air duct cover plate 130, the overall miniaturization of the air duct assembly 100 can be achieved, thereby improving the volume ratio of the refrigerator.

[0042] It should be noted that the refrigerator can have a separate refrigerator compartment, which is fitted to the air duct assembly 100, and the first air outlet 131 is connected to the refrigerator compartment. Preferably, the main air duct plate 110 in the refrigerator of this application can be directly used as the back panel of the refrigerator compartment.

[0043] The first air outlet 131 can be set on the upper part of the air duct cover 130, so that the air outlet position of the first air outlet 131 is higher. After the cooling air enters the refrigerator compartment from the first air outlet 131, it can flow from the high point to the low point in the refrigerator compartment, and the air outlet in the refrigerator compartment is more uniform.

[0044] A first air guide strip 1311 can also be provided on the first air outlet 131. The first air guide strip 1311 can guide the cooling air flowing out of the first air outlet 131 to the required position according to the air outlet requirements of the refrigerator compartment. Specifically, multiple first air guide strips 1311 can be arranged at intervals along the length of the first air outlet 131. The orientation of different first air guide strips 1311 can be the same or different, so as to guide the cooling air flowing out of the first air outlet 131 to different positions in the refrigerator compartment, which is beneficial to the uniformity of air outlet in the refrigerator compartment and improves the cooling efficiency.

[0045] In some embodiments, the main air duct plate 110 includes a top wall 112 and a bottom wall 114 disposed opposite to each other, and side walls 113 and a rear wall 115 connecting the top wall 112 and the bottom wall 114. Since the air outlet of the refrigerator compartment is typically located at a high position, in order to reduce the volume of the air cavity 121 formed by the air duct surround plate 120 and the main air duct plate 110, the side walls 113 and / or the bottom wall 114 of the air duct surround plate 120 and the main air duct plate 110 are spaced apart. This results in a smaller volume of the air cavity 121 formed by the air duct surround plate 120 and the main air duct plate 110, and the space between the side walls 113 and / or the bottom wall 114 of the air duct surround plate 120 and the main air duct plate 110 can be used to increase the volume of the refrigerator compartment. In other embodiments, depending on the refrigerator structural design, the air duct surround plate 120 may also be spaced apart from the top wall 112 of the main air duct plate 110.

[0046] In addition, the space between the side wall 113 and / or bottom wall 114 of the air duct enclosure 120 and the main air duct plate 110 allows cooling air to flow through. To improve air outlet efficiency, a second air outlet 123 is formed on the air duct enclosure 120. The second air outlet 123 is located differently from the first air outlet 131, which can improve the air outlet efficiency of the air duct assembly 100 and improve the air outlet uniformity in the refrigerator compartment, resulting in a more even temperature distribution inside the refrigerator compartment. A second air guide strip can also be provided on the second air outlet 123. The second air guide strip can guide the cooling air flowing out of the second air outlet 123 to the required position according to the air outlet demand in the refrigerator compartment. Specifically, multiple second air guide strips can be arranged at intervals along the length of the second air outlet 123. The orientation of different second air guide strips can be the same or different to guide the cooling air flowing out of the second air outlet 123 to different positions in the refrigerator compartment, which is beneficial to the air outlet uniformity in the refrigerator compartment and improves cooling efficiency.

[0047] In one specific embodiment, the duct enclosure 120 can be spaced apart from the side walls 113 and bottom walls 114 of the main duct plate 110, that is, the duct enclosure 120 and the top wall 112 of the main duct plate 110 enclose each other to form an air cavity 121. It should be noted that, in this case, the duct enclosure 120 does not need to enclose the entire top wall 112 of the main duct plate 110 to form an air cavity 121; the duct enclosure 120 can form an air cavity 121 with only a portion of the top wall 112 of the main duct plate 110. For example, the duct enclosure 120 can be arc-shaped, with the second air outlet 123 blowing air towards the side walls 113 and bottom walls 114 of the main duct plate 110, resulting in higher air outlet efficiency and more uniform air outlet of the duct assembly 100.

[0048] In another specific embodiment, the duct enclosure 120 can be spaced apart from the bottom wall 114 of the main duct plate 110, that is, the duct enclosure 120, together with the top wall 112 and side wall 113 of the main duct plate 110, forms an air cavity 121. It should be noted that, in this case, the duct enclosure 120 does not need to completely enclose the top wall 112 and side wall 113 of the main duct plate 110 to form the air cavity 121; the duct enclosure 120 can form the air cavity 121 with only a portion of the top wall 112 and side wall 113 of the main duct plate 110. For example, the duct enclosure 120 can be arranged relatively parallel to the top wall 112, with the second air outlet 123 blowing air towards the bottom wall 114 of the main duct plate 110.

[0049] In another specific embodiment, the duct enclosure 120 can be spaced apart from the side wall 113 of the main duct plate 110, that is, the duct enclosure 120 and the top wall 112 and bottom wall 114 of the main duct plate 110 enclose each other to form an air cavity 121. It should be noted that, in this case, the duct enclosure 120 does not need to enclose all the top wall 112 and bottom wall 114 of the main duct plate 110 to form an air cavity 121; the duct enclosure 120 can form an air cavity 121 with only a portion of the top wall 112 and bottom wall 114 of the main duct plate 110. For example, the duct enclosure 120 can be vertically arranged, with the second air outlet 123 blowing air towards the side wall 113 of the main duct plate 110.

[0050] To stably fix the fan 140, the fan 140 is mounted on the main air duct plate 110. The air inlet 141 of the fan 140 is correspondingly set with the air outlet 111. When the fan 140 operates, it draws cooling air into the air inlet 141 from the air outlet 111 and blows it into the air chamber 121 from the air outlet 140. The air in the air chamber 121 is blown out from the first air outlet 131 and the second air outlet 123 to deliver air to the refrigerator compartment. Since the main air duct plate 110 is the main structure of the air duct assembly 100, mounting the fan 140 on the main air duct plate 110 helps to support the weight of the fan 140 and ensures the stability of the fan 140's operation. Of course, in other embodiments, the fan 140 can also be mounted on the air duct enclosure plate 120 or the air duct cover plate 130, as long as the air inlet 141 of the fan 140 is correspondingly set with the air outlet 111. There is no limitation here.

[0051] To reduce the number of parts and facilitate manufacturing and assembly, the duct enclosure 120 and the main duct plate 110 are integrally formed. Thus, the duct assembly 100 can be assembled simply by installing the fan 140 inside the air cavity 121 and placing the duct cover 130 at the opening 122 on the air cavity 121. The structure is simple and the installation is convenient.

[0052] Furthermore, a snap-fit ​​portion is formed on the main air duct plate 110 and / or the air duct enclosure plate 120, and a corresponding snap-fit ​​portion 132 is formed on the air duct cover plate 130. The snap-fit ​​portion 132 and the snap-fit ​​portion cooperate to fix the air duct cover plate 130, so that the air duct cover plate 130 can be fixed at the opening 122 of the air cavity 121, and the outer edge of the air duct cover plate 130 coincides with the outer edge of the opening 122.

[0053] Since the area of ​​the main air duct plate 110 without the air cavity 121 is used to increase the volume of the refrigerator compartment, in some embodiments, the area of ​​the main air duct plate 110 without the air cavity 121 directly forms the back panel of the refrigerator compartment. When the refrigerator compartment door is opened to take out or put in items, hot and humid air from outside enters the refrigerator compartment. Because the temperature of the main air duct plate 110 is relatively low, the hot and humid air easily condenses on the main air duct plate 110. The air duct assembly 100 includes a drain hole 161, which is located at the bottom of the main air duct plate 110. Condensate flows down the main air duct plate 110 and flows out from the drain hole 161, which can reduce water accumulation in the refrigerator compartment.

[0054] Furthermore, the air duct assembly 100 also includes guide ribs 162, which are disposed on the main air duct plate 110 and extend toward the drain hole 161. Condensate can be guided by the guide ribs 162 and then collected toward the drain hole 161, and discharged through the drain hole 161, thus preventing condensate from accumulating at the bottom of the main air duct plate 110 and being difficult to discharge from the drain hole 161.

[0055] In some embodiments, the air duct assembly 100 further includes a return air cover 150, which is disposed at the bottom of the main air duct plate 110, forming a return air duct that communicates with the air inlet 111. Air from inside the refrigerator compartment enters the evaporator through the return air duct, is cooled by the evaporator, and then re-enters the air cavity 121 through the air inlet 111, eventually entering the refrigerator compartment. Specifically, the return air cover 150 is integrally formed with the main air duct plate 110.

[0056] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of those features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications will change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. A process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0057] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A duct assembly, characterized in that, include: The main air duct panel forms an air inlet. A duct enclosure is disposed on the main duct plate and surrounds the air inlet. The duct enclosure and the main duct plate enclose each other to form an air cavity, and the air cavity has an opening opposite to the air inlet. A duct cover is provided over the opening, and the outer edge of the duct cover coincides with the outer edge of the opening. A first air outlet is formed on the duct cover, and the first air outlet is located on the upper part of the duct cover. A fan is installed inside the air cavity; The main air duct plate includes a top wall and a bottom wall arranged opposite to each other, as well as two side walls and a rear wall connecting the top wall and the bottom wall. The air duct enclosure is spaced apart from the side walls and / or the bottom wall, and a second air outlet is formed on the air duct enclosure.

2. The air duct assembly according to claim 1, characterized in that, The duct enclosure is arc-shaped.

3. The air duct assembly according to claim 1, characterized in that, The air duct enclosure is integrally formed with the main air duct panel.

4. The air duct assembly according to claim 1, characterized in that, The main air duct plate and / or the air duct enclosure plate have a snap-fit ​​part, and the air duct cover plate has a corresponding snap-fit ​​part, which cooperates with the snap-fit ​​part to fix it.

5. The air duct assembly according to claim 1, characterized in that, The fan is installed on the main air duct plate, and the air inlet of the fan is correspondingly set to the air outlet.

6. The air duct assembly according to claim 1, characterized in that, include: The first air guide strip is located at the first air outlet.

7. The air duct assembly according to claim 1, characterized in that, include: The second air guide strip is located at the second air outlet.

8. The air duct assembly according to claim 1, characterized in that, include: A return air cover is disposed at the bottom of the main air duct plate, and the return air cover forms a return air duct that communicates with the air inlet.

9. The air duct assembly according to claim 1, characterized in that, include: Drainage holes are located at the bottom of the main air duct plate; Guide ribs are provided on the main air duct plate and extend toward the drainage hole.

10. A refrigerator, characterized in that, Includes the air duct assembly described in any one of claims 1-9.

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