Refrigerator

Abstract

The invention relates to the field of electric appliances, and particularly discloses a refrigerator which comprises a refrigerator body, a first inner container, a second inner container and a third inner container, the first inner container is located in the refrigerator body, a first chamber is formed in the first inner container, a second chamber is formed in the second inner container, a third chamber is formed in the third inner container, and the interior of the first chamber is divided into a cold supply channel and a first storage space located on the front side of the cold supply channel. The refrigerator further comprises an air supply duct, an air return duct, a fan and an evaporator, the fan and the evaporator are arranged in the cold supply channel, and the air supply duct comprises a first air supply part communicating with the second chamber and the third chamber and a second air supply part communicating with the first air supply part and the cold supply channel. The air return duct comprises a first air return part communicating with the third chamber and the cold supply channel, and a second air return part communicating with one of the first air return part and the cold supply channel and the second chamber. According to the refrigerator, the structures of the air supply duct and the air return duct and the layout of the air supply duct and the air return duct in the refrigerator body are optimized, the refrigerator body space occupied by the air supply duct and the air return duct is reduced, and the volume of a refrigerator chamber is increased in a disguised mode.

Description

Technical Field

[0001] The invention relates to the field of electrical appliances, and in particular to a refrigerator. Background Art

[0002] like Figure 1 As shown, an existing side T-shaped refrigerator 200 includes a box body 210, a freezing chamber 220, a refrigerating chamber 230 and a variable temperature chamber 240 located in the box body 210, wherein the refrigerating chamber 230 and the variable temperature chamber 240 are located on the same side of the freezing chamber 220 in the horizontal direction and arranged in the vertical direction, a first evaporator 221 is arranged in the freezing chamber 220, and an air supply duct 250 and an air return duct 260 are arranged between the freezing chamber 220 and the refrigerating chamber 230. While the first evaporator 221 cools the freezing chamber 220, the cold air in the freezing chamber 220 also flows to the refrigerating chamber 230 through the air supply duct 250 to cool the refrigerating chamber 230. After the cold air passes through the refrigerating chamber 230, it returns to the freezing chamber 220 through the air return duct 260 to form an air path circulation. A second evaporator 241 is arranged in the variable temperature chamber 240, and the second evaporator 241 cools the variable temperature chamber 240. The above-mentioned side T-shaped refrigerator 200 uses two evaporators, which puts a heavy burden on the compressor, and the structure of the refrigerator 200 is also relatively complex, resulting in high manufacturing costs.

[0003] In the prior art, there are also side T-type refrigerators that use a single evaporator to cool three compartments, but usually two separate air supply ducts are used to supply air to the refrigeration compartment and the variable temperature compartment respectively. The air ducts occupy more space in the refrigerator body, which in turn reduces the volume of the refrigerator compartment. Summary of the invention

[0004] The object of the present invention is to provide a refrigerator which uses a single evaporator to cool three compartments and has a more reasonable air duct layout.

[0005] To achieve the above-mentioned purpose, the refrigerator includes a box body, a first liner formed with a first chamber in the box body, a second liner formed with a second chamber, and a third liner formed with a third chamber, wherein the first chamber is divided into a cooling channel and a first storage space located in front of the cooling channel, the second liner and the third liner are located on the same side of the first liner in the lateral direction and are arranged in the up-down direction, the refrigerator also includes an air supply duct, a return air duct, a fan and an evaporator arranged in the cooling channel, the air supply duct includes a first air supply part connecting the second chamber and the third chamber, a second air supply part connecting the first air supply part and the cooling channel, the return air duct includes a first return air part connecting the third chamber and the cooling channel, and a second return air part connecting the first return air part and one of the cooling channel and the second chamber.

[0006] As a further improvement of the present invention, an air supply port is provided on a side wall of the first inner liner close to the second inner liner in the lateral direction, a first air inlet and a second air inlet are respectively provided on side walls of the second inner liner and the third inner liner close to each other in the up and down directions, the first air supply portion is connected to the second chamber and the third chamber respectively through the first air inlet and the second air inlet, the second air supply portion is connected to the cooling channel through the air supply port, and the air supply duct is arranged in a foaming space formed by the first inner liner, the second inner liner and the third inner liner.

[0007] As a further improvement of the present invention, the refrigerator also includes a first damper assembly and a second damper assembly, the first damper assembly is arranged in the second chamber near the first air inlet so that the first air supply part and the second chamber can be connected and disconnected, and the second damper assembly is arranged in the third chamber near the second air inlet so that the first air supply part and the third chamber can be connected and disconnected.

[0008] As a further improvement of the present invention, the refrigerator also includes a first cover plate arranged in the first chamber and extending in the up-down direction, the first cover plate divides the first chamber into the cooling channel and the first storage space, the evaporator is located at the lower side of the cooling channel, the fan is located above the evaporator and arranged close to the evaporator, the first cover plate includes an upper cover plate portion located above the fan and a lower cover plate portion located below the upper cover plate portion, and the upper cover plate portion is arranged further back than the lower cover plate portion.

[0009] As a further improvement of the present invention, the second air return portion extends in the up-down direction and connects the first air return portion and the second chamber, and the second air supply portion is located in front of the second air return portion and is arranged in a cross shape with the second air return portion.

[0010] As a further improvement of the present invention, the third liner and the first liner are respectively provided with a first air outlet and a return air outlet on the side walls adjacent to each other in the transverse direction, the second liner is provided with a notch recessed from back to front, the second liner is provided with a second air outlet on the side wall in front of the notch, the first return air portion is respectively connected to the third chamber and the cooling channel through the first air outlet and the return air outlet, and the second return air portion is connected to the second chamber through the second air outlet.

[0011] As a further improvement of the present invention, the third inner liner includes an inner liner body and a raised portion protruding backward from the inner liner body, the inner liner body and the raised portion form a clearance space on a side close to the first inner liner, part of the second return air portion is arranged in the clearance space, the raised portion has a rear side wall located on its rear side, at least part of the return air duct is located in front of the rear side wall, and the return air duct also includes a rib connecting the second return air portion and the rear side wall.

[0012] As a further improvement of the present invention, the first return air part has a connecting port connected to the second return air part, and the return air duct also includes a baffle arranged on the side of the connecting port close to the third inner tank, and the baffle is extended downward at an angle in the direction where the third inner tank approaches the first inner tank.

[0013] As a further improvement of the present invention, the second return air portion has a return air section close to the first return air portion, the return air section extends from top to bottom and is inclined toward the direction approaching the first inner tank, and in the direction where the third inner tank approaches the first inner tank, the first return air portion is extended downwardly and inclined.

[0014] As a further improvement of the present invention, the return air duct further includes a support column protruding forward from the second return air portion, and a partial area of ​​the third inner tank corresponds to the support column in the front-to-back direction.

[0015] Beneficial effects of the present invention:

[0016] The refrigerator proposed by the present invention uses a single evaporator to cool three compartments, optimizes the structure of the supply air duct and the return air duct and their layout in the box, reduces the box space occupied by the supply air duct and the return air duct, and increases the volume of the refrigerator compartment in disguised form. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the rear view structure of a side T-shaped refrigerator in the prior art;

[0018] Figure 2 A schematic diagram of the rear structure of a refrigerator provided in one embodiment of the present invention;

[0019] Figure 3 for Figure 2 Schematic diagram of the structure of a medium refrigerator without the box body;

[0020] Figure 4 for Figure 2 A schematic diagram of the first inner container and the internal structure of the first inner container, wherein a portion of the first inner container is cut away to clearly show its internal structure;

[0021] Figure 5 for Figure 2 Schematic diagram of the explosion structure of the refrigerator after the box is removed;

[0022] Figure 6 for Figure 2 Another schematic diagram of the explosion structure after the refrigerator is removed from the box;

[0023] Figure 7 for Figure 2 Structural schematic diagram of the central air supply duct and the return air duct;

[0024] Figure 8 forFigure 2 Front view structural schematic diagram of the first inner tank and its internal structure;

[0025] Figure 9 is Figure 8 Structural schematic diagram of the first cover plate in;

[0026] Figure 10 is Figure 4 Structural schematic diagram of the flow guide plate, fan and air supply duct in;

[0027] Figure 11 is Figure 2 Schematic diagram of the second inner tank and the internal structure of the second inner tank, where a part of the second inner tank is cut away to clearly show its internal structure;

[0028] Figure 12 is Figure 2 Exploded structural schematic diagram of the third inner tank and the internal structure of the third inner tank, where a part of the third inner tank is cut away to clearly show its internal structure;

[0029] Figure 13 is Figure 2 Schematic diagram of the internal structure of the return air duct in;

[0030] Figure 14 is Figure 2 Rear view structural schematic diagram of the refrigerator after removing the box body and the second inner tank. Detailed implementation manners

[0031] The present invention will be described in detail below with reference to the embodiments shown in the drawings. However, this embodiment does not limit the present invention, and any changes in structure, method, or function made by those of ordinary skill in the art based on this embodiment are included in the protection scope of the present invention.

[0032] Spatial relative position terms such as "upper", "lower", "left", "right", "front", "rear", etc. used herein are for the purpose of facilitating description of the relationship between one feature and another as shown in the drawings. It can be understood that depending on the placement position of the product, the spatial relative position terms may be intended to include different orientations other than those shown in the figures, and should not be construed as a limitation on the claims. In addition, the descriptive term "horizontal" used herein is not completely equivalent to being perpendicular to the direction of gravity, and a certain angle of inclination is allowed.

[0033] Such as Figure 2-3As shown in the figure, an embodiment of the present invention provides a refrigerator 100, which includes a box body 40, a first inner liner 10, a second inner liner 20, and a third inner liner 30 located inside the box body 40. The second inner liner 20 and the third inner liner 30 are located on the same side of the first inner liner 10 in the lateral direction and are arranged along the up and down direction, where the second inner liner 20 is located above the third inner liner 30. The first inner liner 10 forms a first compartment 11 of the refrigerator 100, the second inner liner 20 forms a second compartment 21 of the refrigerator 100, and the third inner liner 30 forms a third compartment 31 of the refrigerator 100. In this embodiment, the first compartment 11 is a freezer compartment, the second compartment 21 is a refrigerating compartment, and the third compartment 31 is a variable temperature compartment. In other embodiments, the second compartment 21 can also be set as a variable temperature compartment, and the third compartment 31 can be set as a refrigerating compartment.

[0034] Continue to cooperate with reference to Figure 4-7 As shown in the figure, the first compartment 11 is partitioned into a cooling channel 111 and a first storage space 112 located in front of the cooling channel 111. The refrigerator 100 further includes a supply air duct 50, a return air duct 60, a fan 12 and an evaporator (not shown in the figure) provided in the cooling channel 111. The evaporator can cool the air around it to form cold air. When the fan 12 rotates, it can promote the flow of cold air. The cooling channel 111 and the first storage space 112 are connected, and the cold air can flow into the first storage space 112 for refrigeration. The cold air can also flow through the supply air duct 50 to the second compartment 21 and the third compartment 31 to refrigerate the second compartment 21 and the third compartment 31. After passing through the second compartment 21 and the third compartment 31, the cold air can return to the cooling channel 111 through the return air duct 60 to form an air path circulation.

[0035] In this embodiment, the supply air duct 50 includes a first supply air part 51 connecting the second compartment 21 and the third compartment 31, and a second supply air part 52 connecting the first supply air part 51 and the cooling channel 111. The supply air duct 50 generally has a tee structure. The cold air in the cooling channel 111 first flows through the second supply air part 52 to the first supply air part 51, and then flows into the second compartment 21 and the third compartment 31 respectively through the first supply air part 51.

[0036] The return air duct 60 includes a first return air part 61 connecting the third compartment 31 and the cooling channel 111, and a second return air part 62 connecting the second compartment 21 and the first return air part 61. It can be seen that, similar to the supply air duct 50, the return air duct 60 also generally has a tee structure. The cold air in the third compartment 31 returns to the cooling channel 111 through the first return air part 61, and the cold air in the second compartment 21 first flows through the second return air part 62 to the first return air part 61, and then returns to the cooling channel 111 through the first return air part 61.

[0037] In other embodiments, the second return air part 62 can also be arranged to communicate with the second compartment 21 and the cooling channel 111. At this time, the first return air part 61 and the second return air part 62 are two separate components, and the cold air in the second compartment 21 directly returns to the cooling channel 111 through the second return air part 62.

[0038] In this embodiment, an air outlet 13 is provided on the side wall of the first inner container 10 close to the second inner container 20 in the lateral direction. First air inlets 22 and second air inlets 32 are respectively provided on the side walls of the second inner container 20 and the third inner container 30 close to each other in the up-down direction. The air outlet 13 is directly communicated with the cooling channel 111. The first air inlet 22 is located on the second inner container 20, and the second air inlet 32 is located on the third inner container 30. The first air supply part 51 communicates with the second compartment 21 and the third compartment 31 through the first air inlet 22 and the second air inlet 32 respectively, and the second air supply part 52 communicates with the cooling channel 111 through the air outlet 13. There are intervals between the second inner container 20 and the third inner container 30 and the first inner container 10 in the lateral direction, and there are intervals between the second inner container 20 and the third inner container 30 in the up-down direction. With the above arrangement, the air supply duct 50 can be arranged in the foaming space formed by the intervals between the first inner container 10, the second inner container 20 and the third inner container 30. The foaming space is generally in the shape of a side T. When the refrigerator 100 is manufactured, foaming materials will be filled inside. Arranging the air supply duct 50 here can reduce the occupation of the space inside the box body 40 by the air supply duct 50.

[0039] The air supply duct 50 further includes a first edge wrapping 53 connected to both ends of the first air supply part 51 and one end of the second air supply part 52 far from the first air supply part 51. The three first edge wrappings 53 are respectively attached to the outer side walls of the first inner container 10, the second inner container 20 and the third inner container 30, which can prevent the foaming material from overflowing into the first compartment 11, the second compartment 21, the third compartment 31 and the air supply duct 50.

[0040] Similarly, the return air duct 60 further includes a second edge wrapping 66 connected to both ends of the first return air part 61 and one end of the second return air part 62 far from the first return air part 61. The three second edge wrappings 66 are respectively attached to the outer side walls of the first inner container 10, the second inner container 20 and the third inner container 30, which can prevent the foaming material from overflowing into the first compartment 11, the second compartment 21, the third compartment 31 and the return air duct 60.

[0041] Such as Figure 4 、 8As shown in FIG. 10, the refrigerator 100 further includes a first cover plate 15 disposed in the first compartment 11 and extending in the vertical direction. Specifically, the first cover plate 15 is disposed at the rear side of the first compartment 11 and divides the first compartment 11 into the cooling channel 111 and the first storage space 112. The evaporator is located below the cooling channel 111, and the blower 12 is located above the evaporator and close to the evaporator. Thus, the blower 12 is generally located in the middle of the first compartment 11 in the vertical direction. The air outlet 13 is close to the blower 12, and the blower 12 blows air into the second air supply part 52 through the air outlet 13.

[0042] The first cover plate 15 includes an upper cover plate portion 151 located above the blower 12 and a lower cover plate portion 152 located below the upper cover plate portion 151. The upper cover plate portion 151 is disposed more rearward than the lower cover plate portion 152. With such a design, while the cooling channel 111 can accommodate the blower 12 and the evaporator, more capacity can be saved for the first storage space 112 in the first compartment 11.

[0043] A plurality of channel air outlets 153 communicating the first storage space 112 and the cooling channel 111 are formed at the front side of the first cover plate 15, and a channel air return opening 154 communicating the first storage space 112 and the cooling channel 111 is formed between the bottom of the first cover plate 15 and the first inner container 10. When the blower 12 rotates, the cold air in the cooling channel 111 can be transported from the channel air outlets 153 to the first storage space 112 for refrigeration. After the cold air flows through the first storage space 112, it returns to the cooling channel 111 from the channel air return opening 154 to form an air path circulation. The plurality of channel air outlets 153 are located above the blower 12. A first deflector 17 cooperating with the blower 12 is further disposed in the cooling channel 111. The first deflector 17 and the first cover plate 15 cooperate to form a deflector cavity 171. The cold air in the cooling channel 111 can effectively flow upward through the deflector cavity 171 under the drive of the blower 12, and thus flows out from the plurality of channel air outlets 153 located above the blower 12.

[0044] In this embodiment, the first cover plate 15 is of a split design and may include an upper cover body and a lower cover body arranged in the vertical direction. The upper cover body is generally located in front of and above the blower 12, and the lower cover body is generally located in front of the evaporator. It can be conceived that the upper cover body includes the above-mentioned upper cover plate portion 151 and a part of the lower cover plate portion 152. In other embodiments, the first cover plate 15 may also be of an integral design.

[0045] As Figure 5 、 11As shown in FIG. 12, the refrigerator 100 further includes a first air damper assembly 24 and a second air damper assembly 34. The first air damper assembly 24 is disposed at a position in the second compartment 21 near the first air inlet 22. The opening and closing of the first air damper can make the first air supply part 51 and the second compartment 21 communicate with each other in a switchable manner, so as to control the air supply from the first air supply part 51 to the second compartment 21 and regulate the temperature in the second compartment 21.

[0046] Specifically, the refrigerator 100 further includes a second cover plate 25 disposed at the rear side of the second compartment 21 and an air plate 26 disposed between the second cover plate 25 and the second inner liner 20. A first air supply channel 27 is formed on the air plate 26. The first air supply channel 27 includes a main channel 271 extending in the up and down direction and a plurality of channel branches 272 extending from the main channel 271 to both sides in the horizontal direction. The plurality of channel branches 272 are arranged in the up and down direction. The front side of the second cover plate 25 is a second storage space 29. One end of the channel branch 272 far from the main channel 271 communicates with the second storage space 29. The first air damper assembly 24 is disposed at the bottom of the main channel 271. The cold air flowing out of the first air damper assembly 24 can uniformly flow to various parts of the second storage space 29 through the plurality of channel branches 272 for refrigeration. The structure formed by the second cover plate 25 and the air plate 26 is flat. Compared with the convex air duct in the prior art, it can save volume and increase the usable area of the upper shelf in the second storage space 29.

[0047] The second air damper assembly 34 is disposed at a position in the third compartment 31 near the second air inlet 32. The opening and closing of the second air damper can make the first air supply part 51 and the third compartment 31 communicate with each other in a switchable manner, so as to control the air supply from the first air supply part 51 to the third compartment 31 and regulate the temperature in the third compartment 31.

[0048] Specifically, the refrigerator 100 further includes an air duct assembly 35 disposed at the top of the third compartment 31. Except for the space occupied by the air duct assembly 35 in the third compartment 31, the rest is a third storage space 38. A second air supply channel 351 is provided in the air duct assembly 35. The second air supply channel 351 communicates with the third storage space 38. The second air damper assembly 34 is disposed in the second air supply channel 351. The cold air flowing out of the second air damper assembly 34 flows through the second air supply channel 351 into the third storage space 38 for refrigeration.

[0049] As Figure 5-7As shown in 13-14, the second air return portion 62 extends in the up-down direction and connects the first air return portion 61 and the second chamber 21. The second air return portion 62 is arranged near the first inner liner 10 in the transverse direction. The second air supply portion 52 is located in front of the second air return portion 62 and is arranged in a cross shape with the second air return portion 62. With such a design, the air supply duct 50 and the air return duct 60 partially overlap in the front-to-back direction, which can reduce the space of the box 40 that the two need to occupy in the transverse direction. The second air supply portion 52 and the second air return portion 62 are spaced apart in the front-to-back direction to prevent the cold air in the second air supply portion 52 from affecting the second air return portion 62 by heat conduction, causing condensation or frost in the second air return portion 62.

[0050] Specifically, the third liner 30 and the first liner 10 are provided with a first air outlet 33 and a return air outlet 14 on the side walls adjacent to each other in the transverse direction, the first air outlet 33 is located on the third liner 30, the return air outlet 14 is located on the first liner 10, the second liner 20 is provided with a notch 28 concave from back to front, the second liner 20 is provided with a second air outlet 23 on the side wall in front of the notch 28, the first return air portion 61 is connected to the third compartment 31 and the cooling channel 111 through the first air outlet 33 and the return air outlet 14, respectively, and the second return air portion 62 is connected to the second compartment 21 through the second air outlet 23. With the above arrangement, the first return air portion 61 and at least part of the second return air portion 62 can be arranged in the foaming space formed by the second liner 20 and the third liner 30 being separated from the first liner 10 in the transverse direction, so as to reduce the occupation of the space in the box body 40 by the return air duct 60.

[0051] Furthermore, the third inner liner 30 includes an inner liner body 36 and a raised portion 37 raised backward from the inner liner body 36, the inner liner body 36 and the raised portion 37 form a clearance space on the side close to the first inner liner 10, part of the second return air portion 62 is arranged in the clearance space, the raised portion 37 has a rear side wall 371 located on its rear side, at least part of the return air duct 60 is located in front of the rear side wall 371, the return air duct 60 also includes a rib 63 connecting the second return air portion 62 and the rear side wall 371, the rib 63 can limit the position of the return air duct 60 to prevent the return air duct 60 from being misplaced when the refrigerator 100 is foaming. In specific settings, a positioning protrusion 372 can be set on the rear side wall 371, and a positioning hole 631 cooperating with the positioning protrusion 372 can be set on the rib 63.

[0052] In this embodiment, the first return air portion 61 has a connecting port 67 connected to the second return air portion 62, and the return air duct 60 also includes a baffle 68 provided on the side of the connecting port 67 close to the third inner liner 30. In the direction in which the third inner liner 30 approaches the first inner liner 10, the baffle 68 is extended and inclined downward. The baffle 68 can prevent the cold air in the second return air portion 62 from entering the third chamber 31 in the reverse direction through the first return air portion 61 when returning air.

[0053] Furthermore, the second air return portion 62 has an air return section 65 close to the first air return portion 61, the air return section 65 extends downward from top to bottom and is inclined toward the first inner liner 10, and in the direction in which the third inner liner 30 approaches the first inner liner 10, the first air return portion 61 is arranged to be inclined downward, such that Figure 13 As shown, the return air in the first return air portion 61 and the second return air portion 62 can flow smoothly to the return air port 14 without interference.

[0054] In this embodiment, the return air duct 60 further includes a support column 64 protruding forward from the second return air portion 62, and a partial area of ​​the third inner liner 30 corresponds to the support column 64 in the front-to-back direction. The support column 64 can abut against the third inner liner 30 when the refrigerator 100 is foaming to prevent the return air duct 60 from being squeezed and deformed by the foaming material, and the support column 64 can also separate the third inner liner 30 from the return air duct 60 to prevent the temperature in the third inner liner 30 from affecting the return air duct 60, resulting in condensation or frost in the return air duct 60. The return air duct 60 can be designed in two halves, that is, the return air duct 60 includes two shells connected in the front-to-back direction.

[0055] In summary, the refrigerator 100 proposed in the present invention, while using a single evaporator to cool three compartments, optimizes the structure of the supply air duct 50 and the return air duct 60 and their layout in the cabinet 40, reduces the space of the cabinet 10 occupied by the supply air duct 50 and the return air duct 60, and increases the volume of the compartments of the refrigerator 100 in disguised form.

[0056] It should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0057] The above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A refrigerator, comprising a box body, a first inner liner formed with a first compartment in the box body, a second inner liner formed with a second compartment, and a third inner liner formed with a third compartment. A cooling channel and a first storage space located in front of the cooling channel are separated in the first compartment. The second inner liner and the third inner liner are located on the same side of the first inner liner in the lateral direction and are arranged in the vertical direction. The refrigerator further comprises a supply air duct, a return air duct, a fan and an evaporator arranged in the cooling channel, and is characterized in that, The air supply duct includes a first air supply portion connecting the second compartment and the third compartment, and a second air supply portion connecting the first air supply portion and the cooling channel. The air return duct includes a first air return portion connecting the third compartment and the cooling channel, and a second air return portion connecting one of the first air return portion and the cooling channel and the second compartment.

2. The refrigerator according to claim 1, wherein, The first inner liner is provided with an air supply port on a side wall close to the second inner liner in the lateral direction, and the second inner liner and the third inner liner are provided with a first air inlet and a second air inlet on side walls close to each other in the up-down direction, respectively. The first air supply portion is connected to the second chamber and the third chamber respectively through the first air inlet and the second air inlet, and the second air supply portion is connected to the cooling channel through the air supply port. The air supply duct is provided in a foaming space formed by the first inner liner, the second inner liner and the third inner liner.

3. The refrigerator according to claim 1 or 2, characterized in that, The refrigerator also includes a first damper assembly and a second damper assembly, wherein the first damper assembly is arranged in the second chamber near the first air inlet so that the first air supply part and the second chamber can be connected and disconnected, and the second damper assembly is arranged in the third chamber near the second air inlet so that the first air supply part and the third chamber can be connected and disconnected.

4. The refrigerator according to claim 1, wherein, The refrigerator also includes a first cover plate arranged in the first chamber and extending in the up-down direction, the first cover plate divides the first chamber into the cooling channel and the first storage space, the evaporator is located at the lower side of the cooling channel, the fan is located above the evaporator and arranged close to the evaporator, the first cover plate includes an upper cover plate portion located above the fan and a lower cover plate portion located below the upper cover plate portion, and the upper cover plate portion is arranged further back than the lower cover plate portion.

5. The refrigerator according to claim 2, characterized in that, The second air return portion extends in the up-down direction and communicates with the first air return portion and the second chamber. The second air supply portion is located in front of the second air return portion and is arranged in a cross shape with the second air return portion.

6. The refrigerator according to claim 5, characterized in that, The third liner and the first liner are respectively provided with a first air outlet and a return air outlet on side walls adjacent to each other in the transverse direction, the second liner is provided with a notch recessed from back to front, the second liner is provided with a second air outlet on the side wall in front of the notch, the first return air portion is respectively connected to the third chamber and the cooling channel through the first air outlet and the return air outlet, and the second return air portion is connected to the second chamber through the second air outlet.

7. The refrigerator according to claim 6, characterized in that, The third inner liner includes an inner liner body and a raised portion protruding backward from the inner liner body. The inner liner body and the raised portion form a clearance space on a side close to the first inner liner. Part of the second return air portion is arranged in the clearance space. The raised portion has a rear side wall located on its rear side. At least part of the return air duct is located in front of the rear side wall. The return air duct also includes a rib connecting the second return air portion and the rear side wall.

8. The refrigerator according to claim 6, characterized in that, The first return air portion has a connecting port connected to the second return air portion, and the return air duct also includes a baffle plate arranged on the side of the connecting port close to the third inner liner, and the baffle plate is arranged to extend downwardly and tilted in the direction in which the third inner liner approaches the first inner liner.

9. The refrigerator according to claim 8, characterized in that, The second air return portion has an air return section close to the first air return portion, the air return section extends from top to bottom and is inclined toward the first inner liner, and in the direction in which the third inner liner approaches the first inner liner, the first air return portion is extended and inclined downward.

10. The refrigerator according to claim 1, characterized in that, The return air duct further includes a support column protruding forward from the second return air portion, and a partial area of the third inner tank corresponds to the support column in the front-rear direction.

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