CN219120857U - Air duct assembly and refrigerator - Google Patents

Abstract

The application provides an air duct assembly and a refrigerator. The air duct assembly includes a main housing, an evaporator, and a heating element. The main housing has a refrigeration zone, a return air zone, and a heating zone. Wherein the return air zone is used for forming a return air pipe. The evaporator is arranged in the refrigeration area of the main shell. The heating element is arranged in the heating area of the main shell. The heating parts are at least distributed at the air inlet end of the evaporator and the air outlet end of the air return pipe corresponding to the air return area. This application is through dividing out the return air district on setting up the main casing of evaporimeter and heating piece, makes the return air district form the return air pipe, can avoid setting up solitary return air pipe, reduces the occupation space of return air pipe in the refrigerator, reduce cost. In addition, the evaporator in refrigeration district probably can lead to the phenomenon that the return air district appears icing, frosting, and this application is through making the heating member distribute in the air-out end of the return air pipe that the return air district corresponds, can also utilize the heating member during operation to defrost the return air district, and the guarantee can normally return air.

Description

Air duct assembly and refrigerator

Technical Field

The application relates to the technical field of refrigerators, in particular to an air duct assembly and a refrigerator.

Background

The refrigeration of the refrigerating chamber and the freezing chamber in the single-system refrigerator shares one evaporator. The evaporator is generally disposed in a region corresponding to the freezing chamber. The return air of the refrigerating chamber is communicated with the air inlet end of the refrigerating chamber and the evaporator through a separate return air pipe. The arrangement of the independent return air pipe occupies large space.

Disclosure of Invention

The application provides an air duct assembly and refrigerator to solve among the prior art refrigerator and set up solitary return air pipe, solitary return air pipe occupation space big technical problem.

To solve the above problems, the present application provides an air duct assembly, including:

the main shell is provided with a refrigeration zone, a return air zone and a heating zone, wherein the return air zone is used for forming a return air pipe;

the evaporator is arranged in the refrigerating area;

the heating parts are arranged in the heating areas and are at least distributed at the air inlet ends of the evaporators and the air outlet ends of the air return pipes corresponding to the air return areas.

The main shell is provided with a partition board, the refrigerating area is positioned on one side of the partition board, and the return air area is positioned on the other side of the partition board.

The edge of the main shell is provided with a first folding edge, the first folding edge is positioned on one side of the partition board facing the return air area, and a runner corresponding to the return air pipe is formed between the partition board and the first folding edge.

Wherein, the baffle with first hem will return air district encloses into the runner groove of return air pipe.

The partition board is provided with a bending part extending towards the first folding edge, and the partition board and the first folding edge enclose the return air area into the return air pipe.

The main shell is further provided with a connecting part, and the connecting part is positioned at the air inlet end of the air return pipe and used for connecting with an air outlet of the refrigerating chamber of the refrigerator.

The partition board is provided with a first extension part, the first folding edge is provided with a second extension part, and the first extension part and the second extension part form side walls of the connecting part.

The first extension part is formed by extending the partition plate towards the direction away from the air outlet end and away from the first folded edge;

the second extension part is formed by extending the first folded edge towards the direction away from the air outlet end.

Wherein, the heating element is also distributed in the return air zone.

The heating piece is a heating pipe, and the heating pipe extends from the air inlet end of the evaporator to the air outlet end of the return air pipe corresponding to the return air zone along the direction from the refrigerating zone to the return air zone.

The edge of the main shell is provided with a second folded edge, the second folded edge is distributed at the edge of the heating area, a drain pipe is arranged on the second folded edge, and the drain pipe is used for draining condensed water.

The application also provides a refrigerator, has walk-in and freezer, the walk-in has the air outlet, the freezer is provided with any as above wind channel subassembly, return air pipe that return air district formed in the wind channel subassembly with the air outlet intercommunication.

The beneficial effects of this embodiment of the application are: the application provides an air duct assembly, the air duct assembly includes a main housing, an evaporator, and a heating element. The main housing has a refrigeration zone, a return air zone, and a heating zone. Wherein the return air zone is used for forming a return air pipe. The evaporator is arranged in the refrigeration area of the main shell. The heating element is arranged in the heating area of the main shell. The heating parts are at least distributed at the air inlet end of the evaporator and the air outlet end of the air return pipe corresponding to the air return area. This application is through dividing out the return air district on the main casing, makes the return air district form the return air pipe, is equivalent to with return air pipe and the integrated setting of main casing, in the wind channel subassembly that this application provided is applied to the refrigerator, the refrigerator need not to set up the return air pipe alone again, reduce cost, can reduce the occupation space of return air pipe in the refrigerator simultaneously. In addition, the evaporator in refrigeration district probably can lead to the phenomenon that the return air district appears icing, frosting, and this application also distributes through the air-out end at the return air pipe that the return air district corresponds has the heating member, and when the heating member starts work to the evaporator defrosting, the heat that the heating member produced also can get into the return air district to the heating member can also play the effect to the defrosting in return air district, can avoid the return air district to influence normal return air because of frosting is too much, and the guarantee return air district can normally return air.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic perspective view of an air duct assembly provided herein;

FIG. 2 is a schematic structural view of a partition and a first flange of the air duct assembly provided by the present application enclosing a return air zone into a return air duct;

fig. 3 is a schematic structural diagram of the air duct assembly provided in the present application in cooperation with an air outlet of a refrigerating chamber.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not limiting. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1 and fig. 3, fig. 1 is a schematic perspective view of an air duct assembly provided in the present application, and fig. 3 is a schematic structural view of the air duct assembly provided in the present application in cooperation with an air outlet of a refrigerating chamber. The present application provides a duct assembly 100. The duct assembly 100 includes a main housing 10, an evaporator 20, and a heating member 30. The main housing 10 has a refrigeration zone 11, a return air zone 12 and a heating zone 13. The return air section 12 is used to form a return air duct 16. The evaporator 20 is provided in the cooling zone 11 of the main housing 10. The heating member 30 is provided in the heating zone 13 of the main casing 10. The heating element 30 is sewn to at least the air outlet end 121 of the return air duct 16 corresponding to the air inlet end 111 and the return air zone 12 of the evaporator 20.

The air duct assembly 100 provided by the application can be applied to a refrigerator. The refrigerator may be a single system refrigerator. The refrigerator includes a cabinet having a freezing chamber and a refrigerating chamber 200, and a door. The refrigerating compartment 200 has an air outlet 201. The air duct assembly 100 may be provided at a sidewall of the freezing chamber. The return air duct 16 formed in the return air zone 12 of the air duct assembly 100 is communicated with the air outlet 201 of the refrigerating chamber 200, so that air in the refrigerating chamber 200 of the refrigerator can return to the air inlet end 111 of the evaporator 20 through the return air duct 16.

It should be appreciated that the duct assembly 100 should also be provided with a cover plate. The cover plate may cover one side of the main housing 10. A receiving chamber is formed between the cover plate and the main housing 10, and the evaporator 20 and the heating member 30 are both located in the receiving chamber.

The specific structure of the main casing 10 is not limited in this application. The specific shape of the main housing 10 may be designed according to the specific setting environment of the air duct assembly 100 in the freezing compartment. For example, in some embodiments, the refrigerator to which the air duct assembly 100 is applied has only one refrigerating compartment 200 and one freezing compartment, the air duct assembly 100 is disposed at a rear sidewall of the freezing compartment, and the shape of the main casing 10 may be adapted to the shape of the rear sidewall of the freezing compartment. In some embodiments, the main housing 10 may also be the rear sidewall of the freezer compartment liner. The rear side wall means a side wall of the freezing chamber facing the door body. For another example, in some embodiments, the refrigerator to which the air duct assembly 100 is applied has two freezing chambers and two refrigerating chambers 200, and the air duct assembly 100 may be disposed on a partition wall between the two freezing chambers, so that the main casing 10 is disposed toward one freezing chamber, and the cover plate on one side of the main casing 10 is disposed toward the other freezing chamber.

The main housing 10 has a refrigeration zone 11, a return air zone 12 and a heating zone 13. The specific distribution of the refrigeration zone 11, return zone 12 and heating zone 13 within the main housing 10 is not limited in this application. The air outlet 121 of the evaporator 20 is generally provided with a fan 40, so that the heat generated by the heating element 30 of the heating area 13 flows to the evaporator 20 when the evaporator 20 is frosted, and in some embodiments, the heating area 13 is distributed on the side of the cooling area 11 facing the air inlet 111 of the evaporator 20. The air passing through the return air zone 12 also needs to be delivered to the air inlet end 111 of the evaporator 20 to exchange heat with the evaporator 20, and the air outlet end 121 of the return air zone 12 can be in communication with the air inlet end 111 of the refrigeration zone 11 via the heating zone 13. It should be noted that, the air outlet end 121 of the return air area 12 refers to an end corresponding to the air outlet end 121 of the return air duct 16 corresponding to the return air area 12. The air inlet end 111 of the cooling zone 11 refers to the end of the cooling zone 11 corresponding to the air inlet end 111 of the evaporator 20.

The return air zone 12 on the main housing 10 is used to form a return air duct 16. The specific structure of the main housing 10 forming the return air zone 12 is not limited in this application. In some embodiments, the main housing 10 has a partition 14, the refrigeration zone 11 is located on one side of the partition 14, and the return air zone 12 is located on the other side of the partition 14. The freezing compartment of the single-system refrigerator is generally located below the refrigerating compartment 200, and the partition 14 may extend in a vertical direction, as illustrated by the placement of the air duct assembly 100 when applied to the refrigerator, and the refrigerating and return air regions 11 and 12 on the main casing 10 are disposed on both left and right sides of the partition 14, and the heating region 13 is disposed below the refrigerating and return air regions 11 and 12. When the cover plate covers one side of the main housing 10, a return air duct 16 may be formed between the cover plate and the main housing 10.

In some embodiments, the edge of the main housing 10 is provided with a first fold 151. The first fold 151 is located on the side of the partition 14 facing the return air zone 12. The flow channel corresponding to the return air duct 16 formed by the return air area 12 is formed between the partition 14 and the first folded edge 151. The flow channel corresponding to the return air pipe 16 refers to a channel through which the air 5 passes through the return air pipe 16, that is, the interior of the return air pipe 16.

The specific structure of the separator 14 is not limited in this application. Depending on the specific structure of the partition 14, the partition 14 and the first folded edge 151 may enclose the return air area 12 into a flow channel of the return air duct 16, and the partition 14 and the first folded edge 151 may also enclose the return air area 12 into the return air duct 16.

As shown in FIG. 1, in some embodiments, the baffle 14 may have an end 0 attached to the main housing 10 and an end facing away from the main housing 10, in which case the baffle 14 and the first flange 151 will return air zone 12

The flow channel groove of the return air pipe 16 is formed by enclosing, when the cover plate covers one side of the main casing 10, one end of the partition plate 14, which is away from the main casing 10, and one end of the folded edge, which is away from the main casing 10, are all propped against the cover plate, so that the return air pipe 16 is formed by enclosing the return air area 12 by the cover plate, the partition plate 14 and the folded edge.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a partition and a first flange in the air duct assembly provided in the present application to enclose a return air 5 into a return air duct. In some embodiments, the baffle 14 has a fold 141 extending toward the first fold 151. The end of the bent portion 141 facing the first folded edge 151 may be connected to the first folded edge 151, so that the partition 14 and the first folded edge 151 enclose the return air region 12 into the return air duct 16. Of course, when the partition 14 has the bent portion 141, the partition 14 and the first folded edge 151 may be an integrally formed structure.

0 in some embodiments, the main housing 10 also has a connection 17. The connecting portion 17 is located at the air inlet end 111 of the return air duct 16. When the freezing compartment of the refrigerator to which the air duct assembly 100 is applied is located below the refrigerating compartment 200, the connection 17 is located above the return air zone 12, taking a state in which the air duct assembly 100 is placed when applied to the refrigerator as an example. The connection portion 17 is for connecting with an air outlet 201 of the refrigerator compartment 200,

so that the air in the refrigerating compartment 200 is introduced into the return duct 16 through the connection. The specific structure of the connection portion 175 is not limited in this application, and for example, the connection portion 17 may be a section of connection pipe connected to the air inlet end 111 of the return air duct 16. The connecting part 17 can be integrally formed with the main housing 10, so that sealing treatment of the connecting part 17 and the return air pipe 16 is avoided. In some embodiments, the separator 14 may have a first extension 142 and the first fold 151 may have a second extension 151a. The first extension 142 and the second extension 151a may form sidewalls of the connection part 17. The specific structures of the first extension portion 142 and the second extension portion 151a are not limited in this application, and the specific structures of the first extension portion 142 and the second extension portion 151a may be set according to the specific setting position of the air duct assembly 100 in the refrigerator and the specific shape and position of the air outlet 201 of the refrigerator refrigerating chamber 200. For example, in some embodiments, the refrigerator to which the air duct assembly 100 is applied has two freezing chambers and two refrigerating chambers 200, and the two freezing chambers are located below the two refrigerating chambers 200, the air duct assembly 100 is disposed on a partition wall between the adjacent two freezing chambers, the return air region 12 of the main casing 10 is located at one side of the door opening of the main casing 10 facing the freezing chambers, in a direction from the rear side wall of the refrigerating chamber 200 to the door opening of the refrigerating chamber 200, the air outlet 201 of the refrigerating chamber 200 is located closer to the rear side wall of the refrigerating chamber than the air outlet pipe, at this time, the first extension 142 may be formed by extending the partition 14 in a direction away from the air outlet end 121 and away from the first folded edge 151, and the second extension 151a may be formed by extending the first folded edge 151 in a direction away from the air outlet end 121. I.e., the extension path of the first extension 142 includes both the extension in the vertical direction and the extension in the horizontal direction, the extension path of the second extension may include only the extension in the vertical direction.

In some embodiments, the main housing 10 also has a second flange 152 on an edge thereof. The second flanges 152 are distributed at the edges of the heating zone 13. Taking the placement of the air duct assembly 100 in a refrigerator as an example, the heating zone 13 of the main casing 10 is located below the cooling zone 11 and the air return zone 12, and the second folded edges 152 are located at the edge of the main casing 10 and distributed at the edge of the heating zone 13, which corresponds to the second folded edges 152 being located at the lower edge of the main casing 10. The second flange 152 may have the downcomer 18 disposed thereon. When the heating member 30 of the heating zone 13 defrosts the return air zone 12 and the evaporator 20, condensed water generated by defrostation drops to the heating zone 13 under the action of gravity. By providing the drain pipe 18 on the second flange 152, condensed water can be drained.

The evaporator 20 is provided in the cooling zone 11 of the main housing 10. The evaporator 20 is used for exchanging heat with the secondary gas to change the high-temperature gas at the air inlet end 111 of the evaporator 20 into low-temperature gas, and the low-temperature gas is output from the air outlet end 121 of the evaporator 20. The air outlet 121 of the evaporator 20 is generally provided with a fan 40, and the fan 40 is used for blowing out low-temperature gas after heat exchange with the evaporator 20. As shown in fig. 1, during refrigeration, the air in the return air area 12 flows out from the air outlet end 121 of the return air area 12 under the suction force of the fan 40, then moves leftwards to reach the air inlet end 111 of the evaporator 20, and further moves along the air inlet end 111 of the evaporator 20 to the air outlet end 121 of the evaporator 20, so as to exchange heat with the evaporator 20.

The heating member 30 is provided in the heating zone 13 of the main casing 10. The heating element 30 is at least distributed at the air outlet end 121 of the evaporator 20 and the air outlet end 121 of the air return end corresponding to the air return area 12, so that when the evaporator 20 is frosted, the heat emitted by the heating element 30 can not only melt the frosting on the evaporator 20, but also ensure the frosting of the air return area 12 to melt, and the periodic frosting of the air return area 12 is realized simultaneously due to the fact that the evaporator 20 needs to be frosted regularly, the frosting in the air return pipe 16 is prevented from influencing normal air return, and the normal use of the air return pipe 16 is ensured.

The specific structure of the heating member 30 is not limited in this application, and for example, in some embodiments, the heating member 30 may be a heating tube. Along the direction from the refrigeration zone 11 to the return air zone 12, the heating pipe can extend from the air inlet end 111 of the evaporator 20 to the air outlet end 121 of the return air pipe 16 corresponding to the return air zone 12, so that the heating element 30 is distributed at the air inlet end 111 of the evaporator 20 and the air outlet end 121 of the return air pipe 16 corresponding to the return air zone 12.

In some embodiments, the heating elements 30 may also be distributed within the return air zone 12, which may further ensure that frost melts within the return air duct 16. When the heating element 30 is a heating tube, the heating tube may extend into the return air zone 12, so that the heating element 30 is distributed in the return air zone 12.

The wind channel subassembly 100 that this application provided, through dividing out return air zone 12 on main casing 10, make return air zone 12 form return air pipe 16, be equivalent to with return air pipe 16 and main casing 10 integrated setting, in the wind channel subassembly 100 that this application provided is applied to the refrigerator, the refrigerator need not to set up return air pipe 16 alone again, reduce cost can reduce the occupation space of return air pipe 16 in the refrigerator simultaneously. In addition, the evaporator 20 of the refrigeration district 11 probably can lead to the phenomenon that the return air district 12 freezes, frosts, and this application also distributes through the air-out end 121 at return air pipe 16 that return air district 12 corresponds has heating member 30, and when heating member 30 starts the work to the defrosting of evaporator 20, the heat that heating member 30 produced also can get into return air district 12 to heating member 30 can also play the effect to the defrosting of return air district 12, can avoid return air district 12 to influence normal return air because of frosting is too much, ensure that return air district 12 can normally return air.

In another embodiment of the present application, a refrigerator is also provided. The refrigerator is a single system refrigerator. The refrigerator includes a refrigerator body and a door body. The cabinet may have a refrigerating compartment 200 and a freezing compartment. The freezing compartment may be located below the refrigerating compartment 200. The specific number of the freezing and refrigerating chambers 200 in the case is not limited, and one freezing and refrigerating chambers 200 may be provided, and two or more freezing and refrigerating chambers 200 may be provided. The freezer compartment is provided with the air duct assembly 100 of any of the above embodiments. The return duct 16 formed by the return air zone 12 in the air duct assembly 100 communicates with the air outlet 201 of the fresh food compartment 200.

The refrigerator provided by the application adopts all the technical schemes of all the embodiments of the air duct assembly 100, so that the refrigerator at least has all the beneficial effects brought by the technical schemes of the embodiments of the air duct assembly 100, and the detailed description is omitted.

The present application provides an air duct assembly 100 and a refrigerator. The duct assembly 100 includes a main housing 10, an evaporator 20, and a heating member 30. The main housing 10 has a refrigeration zone 11, a return air zone 12 and a heating zone 13. Wherein the return air section 12 is used to form a return air duct 16. The evaporator 20 is provided in the cooling zone 11 of the main housing 10. The heating member 30 is provided in the heating zone 13 of the main casing 10. The heating elements 30 are at least distributed at the air inlet end 111 of the evaporator 20 and the air outlet end 121 of the return air duct 16 corresponding to the return air zone 12. This application is through dividing out return air zone 12 on main casing 10, makes return air zone 12 form return air pipe 16, is equivalent to with return air pipe 16 and main casing 10 integrated setting, in the wind channel subassembly 100 that this application provided is applied to the refrigerator, the refrigerator need not to set up return air pipe 16 alone again, reduce cost, can reduce the occupation space of return air pipe 16 in the refrigerator simultaneously. In addition, the evaporator 20 of the refrigeration district 11 probably can lead to the phenomenon that the return air district 12 freezes, frosts, and this application also distributes through the air-out end 121 at return air pipe 16 that return air district 12 corresponds has heating member 30, and when heating member 30 starts the work to the defrosting of evaporator 20, the heat that heating member 30 produced also can get into return air district 12 to heating member 30 can also play the effect to the defrosting of return air district 12, can avoid return air district 12 to influence normal return air because of frosting is too much, ensure that return air district 12 can normally return air.

The foregoing description is only the embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims (12)

1. An air duct assembly, comprising:

the main shell is provided with a refrigeration zone, a return air zone and a heating zone, wherein the return air zone is used for forming a return air pipe;

the evaporator is arranged in the refrigerating area;

the heating parts are arranged in the heating areas and are at least distributed at the air inlet ends of the evaporators and the air outlet ends of the air return pipes corresponding to the air return areas.

2. The air duct assembly of claim 1, wherein the main housing has a partition, the refrigeration zone being located on one side of the partition, and the return air zone being located on the other side of the partition.

3. The air duct assembly of claim 2, wherein the edge of the main housing has a first fold located on a side of the partition facing the return air area, and wherein the corresponding flow passage of the return air duct is formed between the partition and the first fold.

4. A duct assembly according to claim 3, wherein the partition and the first flap enclose the return air region as a flow channel slot of the return air duct.

5. A duct assembly according to claim 3, wherein the partition has a fold extending toward the first fold, the partition and the first fold enclosing the return air region into the return air duct.

6. The air duct assembly of any of claims 3-5, wherein the main housing further has a connection portion located at an air inlet end of the return air duct for connecting to an air outlet of a refrigerator compartment.

7. The duct assembly of claim 6, wherein the separator has a first extension and the first fold has a second extension, the first extension and the second extension forming sidewalls of the connection.

8. The air chute assembly as recited in claim 7, wherein,

the first extension part is formed by extending the partition plate towards the direction away from the air outlet end and away from the first folded edge;

the second extension part is formed by extending the first folded edge towards the direction away from the air outlet end.

9. The duct assembly of claim 1, wherein the heating elements are further distributed within the return air zone.

10. The air duct assembly of claims 1 or 9, wherein the heating element is a heating tube extending from an air inlet end of the evaporator to an air outlet end of the return air duct corresponding to the return air zone in a direction from the cooling zone to the return air zone.

11. The air duct assembly of claim 1, wherein the edge of the main housing has a second flange that is distributed over the edge of the heating zone, the second flange being provided with a drain for draining condensate.

12. A refrigerator having a refrigerating chamber and a freezing chamber, the refrigerating chamber having an air outlet, wherein the freezing chamber is provided with the air duct assembly of any one of claims 1 to 11, and an air return duct formed in an air return area of the air duct assembly communicates with the air outlet.

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