Air duct assembly and refrigerator

Abstract

The utility model provides an air duct assembly and a refrigerator, the air duct assembly comprises a fan and an air outlet duct, the fan comprises a volute and a fan arranged in the volute, the volute is provided with a freezing air outlet and a first air outlet, and the first air outlet is located above the freezing air outlet; the air outlet duct comprises a freezing air outlet duct, a refrigeration air outlet duct and a variable-temperature air outlet duct, the freezing air outlet duct communicates with the freezing air outlet, the refrigeration air outlet duct and the variable-temperature air outlet duct are arranged at the first air outlet side by side so as to divide the first air outlet into a refrigeration air outlet and a variable-temperature air outlet, and the freezing air outlet duct comprises a first side wall; the volute comprises a transition wall extending from the freezing air outlet to the first air outlet, and the first side wall and the transition wall are connected through a fillet, so that the problem of local turbulence in the air cavity can be solved, noise is reduced, the air supply efficiency of the fan is improved, and the fresh-keeping effect of the refrigerator is improved.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, and in particular to an air duct assembly and a refrigerator. Background Technology

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature, used to store items that require low-temperature preservation. With the development of refrigerator technology, people have increasingly higher demands for the functionality and appearance of refrigerators. Therefore, refrigerators with variable temperature compartments have appeared on the market, facilitating the storage of various types of substances and effectively preventing cross-contamination between different substances, resulting in better preservation.

[0003] In conventional refrigerators with variable temperature compartments, the volute has freezer air outlets, refrigerator air outlets, and variable temperature air outlets in different positions. This causes the magnitude and direction of the mechanical energy gradient in the flow field to change continuously, resulting in problems such as local turbulence and increased noise inside the entire air cavity. This leads to a reduction in the air delivery efficiency of the fan, thereby affecting the refrigerator's preservation effect. Utility Model Content

[0004] This invention provides an air duct assembly and a refrigerator, which can improve problems such as local turbulence and increased noise inside the air cavity.

[0005] To achieve the above objectives, this application provides an air duct assembly, the air duct assembly comprising:

[0006] A fan, comprising a volute and a fan disposed within the volute, the volute having a refrigeration air outlet and a first air outlet, the first air outlet being located above the refrigeration air outlet; and

[0007] The air outlet duct includes a freezer air outlet duct, a refrigerator air outlet duct, and a variable temperature air outlet duct. The freezer air outlet duct is connected to the freezer air outlet. The refrigerator air outlet duct and the variable temperature air outlet duct are arranged side by side at the first air outlet to separate the first air outlet into a refrigerator air outlet and a variable temperature air outlet.

[0008] The refrigeration air outlet duct includes a first sidewall, and the volute includes a transition wall extending from the refrigeration air outlet to the first air outlet. The first sidewall and the transition wall are connected by a rounded corner.

[0009] Optionally, in one embodiment, the radius of the fillet is 2mm to 5mm;

[0010] Optionally, the radius of the fillet is 3 mm.

[0011] Optionally, in one embodiment, the ratio between the thickness of the volute in the Z direction and the width of the volute in the X direction is 1:(7-9).

[0012] Optionally, in one embodiment, the ratio between the thickness of the volute in the Z direction and the width of the volute in the X direction is 1:8.

[0013] And / or, the thickness of the volute in the Z direction is 13mm to 17mm; optionally, the thickness of the volute in the Z direction is 14mm.

[0014] Optionally, in one embodiment, the refrigerated air outlet duct is located above the frozen air outlet duct, and the refrigerated air outlet duct is located above the variable temperature air outlet duct; and / or, the frozen air outlet duct includes a straight duct extending downward from the frozen air outlet along the wind direction, the variable temperature air outlet duct includes a first curved duct extending from the variable temperature air outlet along the wind direction, and the refrigerated air outlet duct includes a second curved duct extending upward from the refrigerated air outlet along the wind direction.

[0015] This application also proposes a refrigerator, which includes a refrigerator compartment, a freezer compartment, a variable temperature compartment, and an air duct assembly as described above. The refrigerator compartment is connected to the refrigerator air outlet duct, the freezer compartment is connected to the freezer air outlet duct, and the variable temperature compartment is connected to the variable temperature air outlet duct.

[0016] Optionally, in one embodiment, the freezer compartment and the variable temperature compartment are arranged side by side, and the refrigerator compartment is located above the freezer compartment and the variable temperature compartment;

[0017] And / or, the refrigerator further includes a chamber and an evaporator, the evaporator and the fan being disposed within the chamber, the chamber being disposed at the rear of the freezer compartment.

[0018] Optionally, in one embodiment, the refrigerator further includes a freezer duct cover, the freezer compartment and the cavity are separated by the freezer duct cover, and the freezer duct cover has a plurality of freezer air outlets arranged sequentially in the Y direction from top to bottom;

[0019] When the refrigerator is in operation, the air volume of the plurality of freezing air outlets is configured to decrease sequentially along the Y direction.

[0020] Optionally, in one embodiment, the effective area of ​​the plurality of refrigeration air outlets decreases sequentially in the Y direction;

[0021] And / or, in the Y direction, the refrigeration duct cover has a first refrigeration air outlet, a second refrigeration air outlet and a third refrigeration air outlet arranged in sequence, and the ratio between the effective area of ​​the first refrigeration air outlet, the effective area of ​​the second refrigeration air outlet and the effective area of ​​the third refrigeration air outlet is 5:(2~3):(1~2).

[0022] Optionally, in one embodiment, the refrigerator further includes a refrigeration return air duct, which is disposed at the back of the compartment; the refrigeration compartment is provided with a second air outlet, the compartment is provided with a first air inlet, and the return air duct extends downward from the second air outlet along the airflow direction to the first air inlet.

[0023] Optionally, in one embodiment, the refrigerator further includes a variable temperature return air duct, which connects the variable temperature compartment and the chamber; the variable temperature return air duct includes a variable temperature return air inlet, which is disposed on the inner wall of the variable temperature compartment.

[0024] This application provides an air duct assembly for a refrigerator. By configuring the refrigeration air outlet and the variable temperature air outlet to both be output at the position of the first air outlet, and connecting the first side wall of the freezer air outlet duct with the transition wall of the first air outlet through a rounded corner, the rounded corner is used as an air supply dividing angle. This can improve the local turbulence problem inside the air cavity, reduce noise, and achieve simultaneous air supply to the refrigerator's refrigeration compartment and variable temperature compartment, reducing cold loss, improving the air supply efficiency of the fan, and helping to improve the refrigerator's preservation effect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the refrigerator's structure from one perspective in one embodiment provided in this application.

[0027] Figure 2 for Figure 1 Sectional view along the AA direction.

[0028] Figure 3 This is a schematic diagram of the assembly of the fan and the freezer air outlet duct in the air duct assembly of a refrigerator in one embodiment of this application.

[0029] Figure 4 This application provides a schematic diagram of the refrigerator (excluding the back panel) from another perspective in one embodiment.

[0030] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0031] The attached figures are labeled as follows:

[0032] 2. Refrigerator compartment; 3. Freezer compartment; 4. Variable temperature compartment; 5. Chamber; 6. Evaporator; 7. Refrigerator return air duct; 10. Refrigerator; 11. Fan; 21. Second air outlet; 31. Freezer air duct cover; 51. First air inlet; 111. Volute; 112. Fan; 121. Freezer air outlet duct; 122. Refrigerator air outlet duct; 123. Variable temperature air outlet duct; 311. Freezer air inlet; 1101. Freezer air outlet; 1102. First air outlet; 1103. Transition wall; 1104. Rounded corner; 1211. First side wall. Detailed Implementation

[0033] 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 them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] In the description of this application, the terms "first," "second," or similar expressions are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more features.

[0035] In the description of this application, the terms "multiple", "various" or similar expressions refer to two or more species, such as two, three, four, five, six, seven, eight, nine, or ten species.

[0036] In the description of this application, the terms "comprising," "having," or similar expressions mean "including but not limited to."

[0037] In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "linked," "connected," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. Fixed connections include, but are not limited to, one or more of welding, riveting, and bonding; detachable connections include, but are not limited to, one or more of abutment, insertion, threaded connection, pin connection, elastic deformation connection, and locking connection. Connections can be mechanical or electrical; they can be direct or indirect through an intermediate medium; and they can represent internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In the description of this application, the X, Y, and Z directions represent three directions in a three-dimensional Cartesian coordinate system, and any two of the X, Y, and Z directions are perpendicular to each other. The X direction represents the width direction of the refrigerator, the Y direction represents the height direction of the refrigerator, and the Z direction represents the thickness direction of the refrigerator.

[0039] In the description of this application, "effective area of ​​the air vent" refers to the area actually used for gas flow, that is, the area of ​​the part of the air vent through which gas can pass.

[0040] It should be noted that in the description of this application, terms such as "front", "rear", "upper", "lower", "top", and "bottom" that indicate direction or positional relationship are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0041] This application provides an air duct assembly that can be used in a refrigerator. It improves local turbulence within the air cavity, reduces noise, increases the fan's air delivery efficiency, and enhances the refrigerator's preservation effect. The following description is in conjunction with the accompanying drawings.

[0042] In the embodiments of this application, such as Figures 2 to 4 As shown, the air duct assembly includes a fan 11 and an air outlet duct. The fan 11 includes a volute 111 and a fan 112 disposed within the volute 111. The volute 111 has a refrigeration air outlet 1101 and a first air outlet 1102, with the first air outlet 1102 located above the refrigeration air outlet 1101. The air outlet duct includes a refrigeration air outlet duct 121, a refrigerator air outlet duct 122, and a variable temperature air outlet duct 123. The refrigeration air outlet duct 121 and the refrigeration air outlet 1101 are connected. 01 are connected, and the refrigerated air outlet duct 122 and the variable temperature air outlet duct 123 are arranged side by side at the first air outlet 1102 to separate the first air outlet 1102 into a refrigerated air outlet and a variable temperature air outlet; the freezer air outlet duct 121 includes a first side wall 1211, and the volute 111 includes a transition wall 1103 extending from the freezer air outlet 1101 to the first air outlet 1102, and the first side wall 1211 and the transition wall 1103 are connected by a rounded corner 1104.

[0043] In the aforementioned air duct assembly, the rounded corner 1104 serves as an air supply splitting angle. At the rounded corner 1104, a portion of the air enters the freezer air outlet duct 121 through the freezer air outlet 1101 to introduce this portion of the air into the freezer compartment of the refrigerator. The remaining air flows along the transition wall 1103 to the first air outlet 1102, where it is split into two streams. One stream is introduced into the refrigerator compartment through the refrigeration air outlet duct 122, and the other stream is introduced into the refrigerator compartment through the variable temperature air outlet duct 123. That is, configuring the refrigeration air outlet and the variable temperature air outlet to both be output at the position of the first air outlet 1102 can improve the local turbulence problem inside the air cavity, reduce noise, and achieve simultaneous air supply to the refrigerator compartment and the variable temperature compartment of the refrigerator, reducing cold loss and improving the air supply efficiency of the fan 11.

[0044] Understandably, the fan 11 is used to guide the cold air generated by the evaporator of the refrigerator to the freezer air outlet duct 121, the refrigerator air outlet duct 122, and the variable temperature air outlet duct 123 respectively. A portion of the cold air enters the freezer compartment of the refrigerator through the freezer air outlet duct 121 for heat exchange to maintain the temperature of the freezer compartment within a suitable range. A portion of the cold air enters the refrigerator compartment of the refrigerator through the refrigerator air outlet duct 122 for heat exchange to maintain the temperature of the refrigerator compartment within a suitable range. And a portion of the cold air enters the variable temperature compartment of the refrigerator through the variable temperature air outlet duct 123 for heat exchange to maintain the temperature of the variable temperature compartment within a suitable range.

[0045] The airflow into the freezer outlet duct 121 can be controlled by adjusting the radius of the rounded corner 1104, and the total airflow into the refrigerator outlet duct 122 and the variable temperature outlet duct 123 can be controlled. Furthermore, the airflow into the refrigerator outlet duct 122 and the variable temperature outlet duct 123 can be controlled by adjusting the effective area ratio of the refrigeration outlet and the variable temperature outlet, thereby achieving the desired freezing effect, refrigeration effect and variable temperature effect.

[0046] The refrigerated air outlet duct 122 and the variable temperature air outlet duct 123 can share a side wall, which extends to the first air outlet 1102 to separate the first air outlet 1102 into a refrigerated air outlet and a variable temperature air outlet.

[0047] In some embodiments of this application, the radius of the fillet 1104 is 2mm to 5mm, for example, it can be 2mm, 3mm, 4mm, 5mm or any value between the two aforementioned values. On the one hand, it can reduce the size of the fan 11, which is conducive to the miniaturization of the duct assembly structure, thereby reducing the manufacturing cost of the duct assembly and facilitating installation and maintenance; on the other hand, it can further improve the air delivery efficiency of the fan 11.

[0048] In some embodiments of this application, the ratio between the thickness of the volute 111 in the Z direction and the width of the volute 111 in the X direction is 1:(7-9), for example, it can be 1:7, 1:8, 1:9 or any two of the aforementioned values, which is beneficial for controlling the volume of the fan 11. The thickness of the volute 111 in the Z direction refers to the straight-line distance between the two farthest points on the outer periphery of the volute 111, and the straight line connecting these two points is parallel to the Z direction; the width of the volute 111 in the X direction refers to the straight-line distance between the two farthest points on the outer periphery of the volute 111, and the straight line connecting these two points is parallel to the Z direction.

[0049] In some embodiments of this application, the thickness of the volute 111 in the Z direction is 13mm to 17mm, for example, it can be 13mm, 14mm, 15mm, 16mm, 17mm or any value between the two aforementioned values, which further reduces the volume of the fan 11 and further improves the air delivery efficiency of the fan 11.

[0050] In some embodiments of this application, see further reference. Figures 2 to 4 The refrigerated air outlet duct 122 is located above the frozen air outlet duct 121, and the refrigerated air outlet duct 122 is located above the variable temperature air outlet duct 123.

[0051] In some embodiments of this application, see further reference. Figures 2 to 4 The refrigeration air outlet duct 121 includes a straight duct extending downwards from the refrigeration air outlet 1101 along the airflow direction. The variable temperature air outlet duct 123 includes a first curved duct extending from the variable temperature air outlet along the airflow direction. The refrigeration air outlet duct 122 includes a second curved duct extending upwards from the refrigeration air outlet along the airflow direction. It should be noted that when the refrigeration air outlet duct 121 is a straight duct, the cold air can maintain a large flow rate when flowing in the straight duct, and the flow path of the cold air from the refrigeration air outlet 1101 to the refrigeration compartment is the shortest, which is beneficial to improving the air supply efficiency of the fan 11 to the refrigeration compartment. The first curved duct reduces the impact and friction of the airflow by changing the direction of the airflow, thereby reducing pressure loss and energy consumption, which is beneficial to improving the air supply efficiency of the fan 11 to the variable temperature compartment. Similarly, configuring the refrigeration air outlet duct 122 to include the second curved duct is beneficial to improving the air supply efficiency of the fan 11 to the refrigeration compartment.

[0052] This application also provides a refrigerator, including but not limited to single-door refrigerators, double-door refrigerators, side-by-side refrigerators, T-type three-door refrigerators, cross-door refrigerators, or French door refrigerators. Figures 1 to 4As shown, the refrigerator 10 includes an air duct assembly, a refrigerator compartment 2, a freezer compartment 3, and a variable temperature compartment 4. The refrigerator compartment 2 is connected to the refrigerator air outlet duct 122, the freezer compartment 3 is connected to the freezer air outlet duct 121, and the variable temperature compartment 4 is connected to the variable temperature air outlet duct 123. The specific structure of the air duct assembly is as described in the above embodiments. Since all the technical solutions of the above embodiments are adopted, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0053] In some embodiments of this application, see further reference. Figures 1 to 4 The freezer compartment 3 and the variable temperature compartment 4 are arranged side by side, with the refrigerator compartment 2 located above them. The freezer compartment 3 and the variable temperature compartment 4, the variable temperature compartment 4 and the refrigerator compartment 2, and the freezer compartment 3 and the refrigerator compartment 2 are separated by partitions. It is understood that the refrigerator air outlet duct 122 extends upwards from the refrigerator air outlet along the airflow direction to the back of the refrigerator compartment 2, and the variable temperature air outlet duct 123 extends from the variable temperature air outlet along the airflow direction to the back of the variable temperature compartment 4.

[0054] In some embodiments of this application, see further reference. Figures 1 to 4 The refrigerator 10 also includes a chamber 5 and an evaporator 6, with the evaporator 6 and a fan 11 located within the chamber 5, which is situated at the rear of the freezer compartment 3. The fan 11 is located, for example, on top of the evaporator 6.

[0055] In some embodiments of this application, see further reference. Figures 1 to 4 The refrigerator 10 also includes a freezer duct cover 31, which separates the freezer compartment 3 from the cavity 5. In the Y-direction from top to bottom, the freezer duct cover 31 has a plurality of freezer air vents 311 arranged sequentially. When the refrigerator 10 is operating, the air volume of the plurality of freezer air vents 311 is configured to decrease sequentially along the Y-direction. For example, in the Y-direction, the freezer duct cover 31 has a first freezer air vent, a second freezer air vent, and a third freezer air vent arranged sequentially. The air volume of the first freezer air vent is configured to be the largest, followed by the second freezer air vent, and the air volume of the third freezer air vent is configured to be the smallest. Since colder air is denser than warmer air, it flows from high to low. If the air volume of multiple refrigeration air outlets is the same, the cold air will sink and cause uneven cooling in the upper and lower parts of the freezer compartment. By configuring the air volume of multiple refrigeration air outlets 311 to decrease sequentially along the Y direction, the uneven temperature phenomenon in the freezer compartment 3 can be alleviated.

[0056] It should be noted that the air volume of the multiple freezer air vents 311 can be reduced sequentially along the Y direction when the refrigerator 10 is working by adjusting the speed of the fan 112. Alternatively, the air volume of the freezer air vents 311 can be controlled by setting a baffle structure at the location of the freezer air vents 311, such as a baffle plate, and adjusting the degree of obstruction of the freezer air vents 311 by the baffle structure.

[0057] In some embodiments of this application, the effective area of ​​the multiple refrigeration air outlets 311 decreases sequentially in the Y direction, so that when the refrigerator 10 is working, the air volume of the multiple refrigeration air outlets 311 decreases sequentially in the Y direction.

[0058] To further improve the air delivery efficiency of the fan 11, in some embodiments of this application, in the Y direction, the refrigeration duct cover 31 has a first refrigeration air outlet, a second refrigeration air outlet, and a third refrigeration air outlet arranged sequentially. The first refrigeration air outlet is located at the upper part of the refrigeration duct cover 31, the second refrigeration air outlet is located at the middle part of the refrigeration duct cover 31, and the third refrigeration air outlet is located at the lower part of the refrigeration duct cover 31. When the refrigerator 10 is working, the air delivery volume of the first refrigeration air outlet, the air delivery volume of the second refrigeration air outlet, and the air delivery volume of the third refrigeration air outlet are configured as 5:(2~3):(1~2). For example, the ratio between the effective area of ​​the first refrigeration air outlet, the effective area of ​​the second refrigeration air outlet, and the effective area of ​​the third refrigeration air outlet is 5:(2~3):(1~2).

[0059] In order to further improve the air delivery efficiency of the fan 11 and reduce the space occupied by the fan 11, in some embodiments of this application, the radius of the rounded corner 1104 is 3mm, the ratio between the thickness of the volute 111 in the Z direction and the width of the volute 111 in the X direction is 1:8, the thickness of the volute 111 in the Z direction is 14mm, and the air delivery volume of the first refrigeration air outlet, the second refrigeration air outlet and the third refrigeration air outlet are configured as 5:(2~3):(1~2). Experiments have shown that, under the premise that other parameters remain unchanged, compared to the following conditions: the radius of the fillet 1104 is 10mm, the thickness of the volute 111 in the Z direction is 20mm, and the air volume of the first, second, and third refrigeration air inlets is configured as 4:3:3, the air delivery efficiency of the fan 11 is higher and the space occupied by the fan 11 is smaller. Specifically, the proportion of air volume sent to the refrigerator compartment 2 is increased from 14% to 17%, the temperature of the variable temperature compartment 4 can be adjusted to -40℃, and the refrigeration efficiency of the refrigerator compartment 2, the freezer compartment 3, and the variable temperature compartment 4 is higher.

[0060] In some embodiments of this application, see further reference. Figures 1 to 4The refrigerator 10 also includes a refrigeration return air duct 7, which is located at the back of the cavity 5. The refrigeration compartment 2 is provided with a second air outlet 21, and the cavity 5 is provided with a first air inlet 51. The second air outlet 21 extends downward along the airflow direction to the first air inlet 51.

[0061] In some embodiments of this application, the refrigerator 10 further includes a variable temperature return air duct, which connects the variable temperature chamber 4 and the cavity 5. The variable temperature return air duct includes a variable temperature return air inlet, which is disposed on the inner wall of the variable temperature chamber 4.

[0062] Understandably, refrigerator 10 also includes some conventional components, including but not limited to compressors, shelves, drawers, etc.

[0063] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0064] The above provides a detailed description of an air duct assembly and a refrigerator provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A duct assembly, characterized in that, include: A fan (11), the fan (11) including a volute (111) and a fan (112) disposed within the volute (111), the volute (111) having a refrigeration air outlet (1101) and a first air outlet (1102), the first air outlet (1102) being located above the refrigeration air outlet (1101); and The air outlet duct includes a freezer air outlet duct (121), a refrigerator air outlet duct (122), and a variable temperature air outlet duct (123). The freezer air outlet duct (121) is connected to the freezer air outlet (1101). The refrigerator air outlet duct (122) and the variable temperature air outlet duct (123) are arranged side by side at the first air outlet (1102) to separate the first air outlet (1102) into a refrigerator air outlet and a variable temperature air outlet. The refrigeration air outlet duct (121) includes a first sidewall (1211), and the volute (111) includes a transition wall (1103) extending from the refrigeration air outlet (1101) to the first air outlet (1102). The first sidewall (1211) and the transition wall (1103) are connected by a rounded corner (1104).

2. The air duct assembly according to claim 1, characterized in that, The radius of the fillet (1104) is 2mm to 5mm; Optionally, the radius of the fillet (1104) is 3 mm.

3. The air duct assembly according to claim 1 or 2, characterized in that, The ratio between the thickness of the volute (111) in the Z direction and the width of the volute (111) in the X direction is 1:(7-9); Optionally, the ratio between the thickness of the volute (111) in the Z direction and the width of the volute (111) in the X direction is 1:8; And / or, the thickness of the volute (111) in the Z direction is 13mm to 17mm; optionally, the thickness of the volute (111) in the Z direction is 14mm.

4. The air duct assembly according to claim 1, characterized in that, The refrigerated air outlet duct (122) is located above the frozen air outlet duct (121), and the refrigerated air outlet duct (122) is located above the variable temperature air outlet duct (123); And / or, the refrigeration air outlet duct (121) includes a straight duct extending downward from the refrigeration air outlet (1101) along the wind direction, the variable temperature air outlet duct (123) includes a first curved duct extending from the variable temperature air outlet along the wind direction, and the refrigeration air outlet duct (122) includes a second curved duct extending upward from the refrigeration air outlet along the wind direction.

5. A refrigerator (10), characterized in that, It includes a refrigerator compartment (2), a freezer compartment (3), a variable temperature compartment (4), and an air duct assembly as described in any one of claims 1 to 4, wherein the refrigerator compartment (2) is connected to the refrigerator air outlet duct (122), the freezer compartment (3) is connected to the freezer air outlet duct (121), and the variable temperature compartment (4) is connected to the variable temperature air outlet duct (123).

6. The refrigerator (10) according to claim 5, characterized in that, The freezer compartment (3) and the variable temperature compartment (4) are arranged side by side, and the refrigerator compartment (2) is located above the freezer compartment (3) and the variable temperature compartment (4); And / or, the refrigerator (10) further includes a chamber (5) and an evaporator (6), the evaporator (6) and the fan (11) being disposed in the chamber (5), the chamber (5) being disposed at the back of the freezer compartment (3).

7. The refrigerator (10) according to claim 6, characterized in that, The refrigerator (10) also includes a freezer duct cover (31), the freezer compartment (3) and the cavity (5) are separated by the freezer duct cover (31), and in the Y direction from top to bottom, the freezer duct cover (31) has a plurality of freezer air outlets (311) arranged in sequence; When the refrigerator (10) is in operation, the air volume of the plurality of freezing air outlets (311) is configured to decrease sequentially along the Y direction.

8. The refrigerator (10) according to claim 7, characterized in that, In the Y direction, the effective area of ​​the multiple refrigeration air outlets (311) decreases sequentially; And / or, in the Y direction, the refrigeration duct cover (31) has a first refrigeration air outlet, a second refrigeration air outlet and a third refrigeration air outlet arranged in sequence, and the ratio between the effective area of ​​the first refrigeration air outlet, the effective area of ​​the second refrigeration air outlet and the effective area of ​​the third refrigeration air outlet is 5:(2~3):(1~2).

9. The refrigerator (10) according to claim 6, characterized in that, The refrigerator (10) also includes a refrigeration return air duct (7), which is located at the back of the chamber (5); the refrigeration chamber (2) is provided with a second air outlet (21), the chamber (5) is provided with a first air inlet (51), and the return air duct extends downward from the second air outlet (21) along the wind direction to the first air inlet (51).

10. The refrigerator (10) according to claim 6 or 9, characterized in that, The refrigerator (10) also includes a variable temperature return air duct, which connects the variable temperature chamber (4) and the cavity (5); the variable temperature return air duct includes a variable temperature return air inlet, which is disposed on the inner wall of the variable temperature chamber (4).

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