CN216716691U - Refrigerator with a door - Google Patents

Abstract

The utility model provides a refrigerator, which comprises a refrigerator body, a refrigerating assembly and a partition plate, wherein the refrigerator body is provided with a refrigerator door; a first box container, a second box container and a third box container are arranged in the box body; the baffle laminating is in the inboard back side wall of third case courage to be formed with the return air passageway between the back side wall of third case courage, the both ends of return air passageway communicate with the inner space of first case courage and second case courage respectively, cold volume in the first case courage gets into in the second case courage, give the refrigeration back of second case courage, the air in the second case courage passes through in the return air passageway gets into first case courage, at first case courage, form circulation circuit between second case courage and return air passageway. An air supply channel communicated with the first tank container and the third tank container is formed in the partition plate. The return air passageway of second case courage is formed between the lateral wall of baffle and third case courage, and the air supply passageway of third case courage is formed in the baffle, make full use of baffle and third case courage to make setting up of the wind channel structure in the box occupy littleer space, and use still less material, practice thrift the cost.

Description

Refrigerator with a door

Technical Field

The utility model relates to the technical field of refrigeration, in particular to a refrigerator.

Background

In real life, refrigerators have become indispensable household appliances. In the using process of the refrigerator, the two spaces for freezing and refrigerating during the design of the refrigerator can meet the requirements of users certainly. In some refrigerators, the refrigerator is provided with three or more compartments to accommodate different needs.

In the related technology, the return air pipes of the air duct components of the multi-door refrigerator are generally arranged in the foaming box and made of plastic pipes or foam pipes, so that the occupied space is large, and the material cost and the labor cost are high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a refrigerator, which occupies a smaller space in the refrigerator due to the arrangement of an air duct structure and saves cost.

In order to solve the technical problems, the utility model adopts the following technical scheme:

according to one aspect of the present invention, there is provided a refrigerator including a cabinet, a refrigerating assembly, and a partition; a first box container, a second box container and a third box container are arranged in the box body; the front sides of the first box container, the second box container and the third box container are open; the second container liner and the third container liner are arranged on the same side of the first container liner at intervals along a first direction; the second tank container and the third tank container are arranged at intervals along a second direction; the second direction is perpendicular to the first direction; the second tank container is communicated with the first tank container; the refrigerating assembly is used for providing cold energy for the first box liner; the partition board is attached to the rear side wall of the inner side of the third box container, a return air channel is formed between the partition board and the rear side wall of the third box container, and two ends of the return air channel are respectively communicated with the inner spaces of the first box container and the second box container; and an air supply channel is formed in the partition plate and is respectively communicated with the inner spaces of the first tank container and the third tank container.

In some embodiments of the present application, a rear side wall inside the third tank container protrudes rearward to form a protruding rib, and a front side of the protruding rib is open; the air return channel is formed between the partition plate and the protruding ribs.

In some embodiments of the present application, the protruding rib is bent to extend partially toward the second tank and partially toward the first tank.

In some embodiments of the present application, a first pipe is disposed between the second tank container and the third tank container; the protruded rib penetrates through the third tank container along a second direction towards one side of the second tank container to form a first opening; an air outlet is formed in the part, close to the third box container, of the side wall of the second box container; the first pipe is communicated with the air outlet and the first opening.

In some embodiments of the present application, the first pipe fits to the rear side wall of the outer side of the third tank liner and the second tank liner, and envelops an end of the protruding rib facing the first pipe; the first pipe is provided with a protruding part protruding forwards, and the protruding part is clamped between the second tank container and the third tank container.

In some embodiments of the present application, a second pipe is disposed between the second tank liner and the third tank liner; the protruding rib penetrates through the third tank container along a first direction towards one side of the first tank container to form a second opening; an air return opening is formed in the part, close to the third box container, of the side wall of the first box container; the second pipe fitting is communicated with the air return opening and the second opening.

In some embodiments of the present application, the second pipe fits to the rear side wall of the outer side of the first tank container and the third tank container, and envelops an end of the protruding rib facing the first tank container; the second pipe fitting is provided with a protruding portion protruding forwards, and the protruding portion is clamped between the first tank container and the third tank container.

In some embodiments of the present application, the air return opening is opened on a side wall of the first tank container facing the third tank container, and the outlet of the second pipe is opened on the protruding portion to correspond to the air return opening.

In some embodiments of the present application, an air outlet communicated with the air supply channel is formed in a front side surface of the partition plate; a cover plate is covered on the front side surface of the partition plate and clamped in the third tank container to limit and support the partition plate; the front side surface of the cover plate is provided with a window communicated with the air outlet.

In some embodiments of the present application, a first air supply pipe is disposed between the first tank liner and the second tank liner, and a second air supply pipe is disposed between the first tank liner and the third tank liner; the first air supply pipe is clamped between the first box container and the second box container, and the second air supply pipe is positioned in an interval between the first box container and the third box container.

According to the technical scheme, the utility model has at least the following advantages and positive effects:

in the utility model, the refrigerating assembly is used for providing cold energy for the first container liner so as to refrigerate the first container liner. The second box container and the third box container are respectively communicated with the first box container so as to respectively supply air to the second box container and the third box container and refrigerate the second box container and the third box container.

The second container is communicated with the first container. The baffle laminating is in the inboard back side wall of third case courage to be formed with the return air passageway between the back side wall of third case courage, the both ends of return air passageway communicate with the inner space of first case courage and second case courage respectively, cold volume in the first case courage gets into in the second case courage, give the refrigeration back of second case courage, the air in the second case courage passes through in the return air passageway gets into first case courage, at first case courage, form circulation circuit between second case courage and return air passageway. An air supply channel communicated with the first tank container and the third tank container is formed in the partition plate. The return air passageway of second case courage is formed between the lateral wall of baffle and third case courage, and the air supply passageway of third case courage is formed in the baffle, make full use of baffle and third case courage to make setting up of the wind channel structure in the box occupy littleer space, and use still less material, practice thrift the cost.

Drawings

Fig. 1 is a schematic structural view of a refrigerator according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of another view angle of the refrigerator according to the embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a first container of a refrigerator according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a second tank liner of the embodiment of the refrigerator according to the utility model.

Fig. 5 is a schematic structural view of a first air supply duct according to an embodiment of the refrigerator of the present invention.

Fig. 6 is a partial schematic diagram of the structure shown in fig. 2.

Fig. 7 is a schematic sectional view showing a part of the structure of the refrigerator according to the embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a third container of the refrigerator according to the embodiment of the present invention.

FIG. 9 is a schematic view of a partition according to an embodiment of the present invention.

FIG. 10 is a schematic view of another embodiment of a partition panel for a refrigerator according to the present invention.

Fig. 11 is a schematic structural view of a cover plate of an embodiment of a refrigerator according to the present invention.

Fig. 12 is a schematic view of a combination structure of a cover plate and a partition plate according to an embodiment of the refrigerator of the present invention.

Fig. 13 is a schematic structural diagram of a first pipe fitting of an embodiment of the refrigerator according to the present invention.

Fig. 14 is a schematic structural view of a second pipe member of the embodiment of the refrigerator according to the present invention.

The reference numerals are explained below: 100. a box body; 110. a first tank container; 111. a first air supply outlet; 112. a second air supply outlet; 113. an air return opening; 120. a second tank liner; 121. an air inlet; 122. an air outlet; 130. a third tank container; 131. an air return channel; 132. stretching the ribs; 133. a first opening; 134. a second opening; 200. an air duct structure; 210. a first blast pipe; 211. a boss portion; 220. a second blast pipe; 230. a partition plate; 231. an air supply channel; 232. an air outlet; 240. a cover plate; 241. a window; 310. a first pipe member; 311. a protrusion; 320. a second pipe member; 321. a projection.

Detailed Description

Exemplary embodiments that embody features and advantages of the utility model are described in detail below. It is understood that the utility model is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the scope of the present invention, and that the description and drawings are to be taken as illustrative and not restrictive in character.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the related technology, the return air pipes of the air duct components of the multi-door refrigerator are generally arranged in the foaming box and made of plastic pipes or foam pipes, so that the occupied space is large, and the material cost and the labor cost are high.

For convenience of description and understanding, a state of the refrigerator when it is used in an upright position is referred to, a direction of the refrigerator facing a user is a front-rear direction, and a width direction of the refrigerator is a left-right direction.

Fig. 1 is a schematic structural view of a refrigerator according to an embodiment of the present invention. Fig. 2 is a schematic structural view of another view angle of the refrigerator according to the embodiment of the present invention.

Referring to fig. 1 and 2, the present embodiment provides a refrigerator, which is a multi-door refrigerator, and refrigeration compartments with different environments are formed therein to accommodate storage of articles with different storage requirements. The refrigerator includes a cabinet 100, a door rotatably covering the cabinet 100, a refrigeration assembly disposed in the cabinet 100, and an air duct structure 200 disposed in the cabinet 100.

A refrigerating compartment having an open front side is constructed in the cabinet 100, and foods are placed in the refrigerating compartment to be stored at a low temperature. A first tank container 110, a second tank container 120 and a third tank container 130 are arranged in the tank body 100; the first tank container 110, the second tank container 120, and the third tank container 130 are all open at the front side to form three cooling compartments open at the front side.

The cooling temperature in the first tank container 110 is lower than that in the second and third tank containers 120 and 130. The cooling capacity in the first tank liner 110 is transferred to the second tank liner 120 and the third tank liner 130, respectively, to cool the second tank liner 120 and the third tank liner 130.

In this embodiment, the first container 110 forms a freezing chamber, the second container 120 forms a refrigerating chamber, and the third container 130 forms a temperature-variable chamber. In some embodiments, the second cabinet bladder 120 forms a temperature-changing chamber, and the third cabinet bladder 130 forms a refrigerating chamber. In other embodiments, the third container 130 is a fresh food compartment.

The second container 120 and the third container 130 are arranged at the same side of the first container 110 at intervals along the first direction; the second tank container 120 and the third tank container 130 are arranged at intervals along the second direction; the second direction is perpendicular to the first direction.

In this embodiment, the second tank container 120 and the third tank container 130 are disposed at the same side of the first tank container 110 in the left-right direction, and the second tank container 120 and the third tank container 130 are disposed at an interval in the up-down direction. The third tank 130 is located below the second tank 120.

In some embodiments, the second tank bladder 120 and the third tank bladder 130 are disposed on the same side of the first tank bladder 110 in the vertical direction, and the second tank bladder 120 and the third tank bladder 130 are disposed at an interval in the left-right direction.

The first tank liner 110 is communicated with the second tank liner 120 and the third tank liner 130, respectively, to supply air to the second tank liner 120 and the third tank liner 130, respectively.

The specific structure and connection relationship of the box body refer to the structure of the box body in the related art, and are not described herein.

The door is openably and closably covered on the front side of the cabinet 100 to open or close the refrigerating compartment of the cabinet 100 and to take and place articles in the refrigerating compartment. In this embodiment, the door is rotatably covered on the front side of the cabinet 100.

The refrigeration assembly is used for releasing heat in the refrigerator to the external environment and providing cold energy for the refrigeration chamber so as to keep the low-temperature environment in the refrigeration chamber. The refrigerating assembly comprises a compressor, a condenser, an evaporator, a capillary tube, a refrigerating air duct and other assemblies. In this embodiment, the refrigeration component directly provides refrigeration to the first tank 110. The specific structure and connection relationship of the refrigeration assembly refer to the refrigeration assembly in the related art, and are not described in detail herein.

The air duct structure 200 is disposed in the box 100, and the air duct structure 200 includes a first air supply pipe 210, a second air supply pipe 220, and a partition plate 230. The first blowing duct 210 is provided between the first tank bladder 110 and the second tank bladder 120 so that the first tank bladder 110 blows air to the second tank bladder 120. The second air blowing duct 220 is provided in the space between the first tank core 110 and the third tank core 130 to blow air from the first tank core 110 to the third tank core 130.

Fig. 3 is a schematic structural view of a first tank container 110 according to an embodiment of the refrigerator of the present invention.

Referring to fig. 2 and 3, in the present embodiment, a first air supply opening 111 and a second air supply opening 112 are formed in a side wall of the first tank 110 facing the second tank 120. The first and second blowing ports 111 and 112 penetrate a sidewall of the first tank 110. The first blowing port 111 communicates with the first blowing duct 210 to blow air to the first blowing duct 210; the second blowing port 112 is communicated with the second blowing duct 220 to blow air to the second blowing duct 220.

In this embodiment, the first air blowing port 111 and the second air blowing port 112 are provided on the side wall of the first tank container 110 facing the second tank container 120, so that the space between the first tank container 110 and the second tank container 120 can be sufficiently utilized, the structure inside the box body 100 is more compact, and the storage space of the box body 100 can be increased by making each tank container larger.

In some embodiments, the first and second blowing ports 111 and 112 are provided on a rear sidewall of the first tank 110.

In this embodiment, a side wall of the first tank container 110 facing the third tank container 130 is further provided with a return air inlet 113 for returning air of the second tank container 120 and the third tank container 130.

In this embodiment, the first and second blowing ports 111 and 112 are provided at an upper portion of the first tank 110, and the return air port 113 is provided at a lower portion of the first tank 110, so that the upper portion blows air to the second and third tanks 120 and 130, and the lower portion returns air.

Fig. 4 is a schematic structural view of a second tank container 120 of the embodiment of the refrigerator according to the present invention.

Referring to fig. 2 to 4, the second tank container 120 is located at one side of the first tank container 110 in the left-right direction, an air inlet 121 is disposed at a portion of the second tank container 120 close to the first tank container 110, and the air inlet 121 penetrates through the wall thickness of the second tank container 120. The air inlet 121 is communicated with the first air supply pipe 210, so that the second tank container 120 is communicated with the first tank container 110 through the first air supply pipe 210.

In this embodiment, the air inlet 121 is disposed on the rear sidewall of the second container 120 and is located on a side of the second container 120 close to the first container 110. In some embodiments, the air inlet 121 is opened on a side wall of the second tank 120 facing the first tank 110.

An air outlet 122 is formed on a portion of the sidewall of the second container 120, which is close to the third container 130. In this embodiment, the air outlet 122 is opened on the rear sidewall of the second container 120 and is located on one side of the second container 120 close to the third container 130. In some embodiments, the air outlet 122 is disposed on a lower sidewall of the second tank 120.

Fig. 5 is a schematic structural view of a first air supply duct 210 according to an embodiment of the refrigerator of the present invention.

Referring to fig. 2 to 5, the first air supply pipe 210 is attached to rear sidewalls of the first and second casings 110 and 120, a protrusion 211 is formed by the first air supply pipe 210 protruding forward, and the protrusion 211 is clamped between the first and second casings 110 and 120 to fully utilize a space in the cabinet 100. A passage is formed in the first air supply pipe 210 to communicate the first air supply outlet 111 of the first tank container 110 with the upper air inlet 121 of the second tank container 120.

In this embodiment, the first air supply pipe 210 is made of foam material, and a channel is formed inside the first air supply pipe 210.

Fig. 6 is a partial schematic diagram of the structure shown in fig. 2.

Referring to fig. 2 and 6, a return air passage 131 is formed at a rear side wall of the third tank container 130, a first pipe 310 is disposed between the second tank container 120 and the third tank container 130, and a second pipe 320 is disposed between the second tank container 120 and the third tank container 130. The first pipe 310 connects the outlet 122 of the second tank 120 to one end of the return air duct 131, and the second pipe 320 connects the return air inlet 113 of the first tank 110 to the other end of the return air duct 131, thereby forming the return air duct 131 of the second tank 120. Both ends of the return air passage 131 are respectively communicated with the inner spaces of the first tank 110 and the second tank 120.

Fig. 7 is a schematic sectional view showing a part of the structure of the refrigerator according to the embodiment of the present invention. Fig. 8 is a schematic structural view of a third tank liner 130 according to an embodiment of the refrigerator of the present invention. Fig. 9 is a schematic view of a partition 230 according to an embodiment of the refrigerator of the present invention. Fig. 10 is a schematic view of another perspective structure of a partition 230 according to an embodiment of the refrigerator of the present invention.

Referring to fig. 2 to 10, in the present embodiment, the partition 230 is attached to the rear side wall of the inner side of the third tank 130, and the return air channel 131 is formed between the rear side wall of the third tank 130 and the partition 230. Specifically, a rear side wall of the inside of the third tank container 130 protrudes rearward to form a protruding rib 132, and a front side of the protruding rib 132 is opened; the partition 230 is attached to the rear side wall of the inside of the third tank 130, and the return air passage 131 is formed between the partition 230 and the projecting rib 132.

The protruding rib 132 penetrates the third tank container 130 in the second direction toward one side of the second tank container 120 to form a first opening 133. The protruding rib 132 penetrates the third tank bladder 130 in the first direction toward one side of the first tank bladder 110 to form a second opening 134.

The first pipe 310 communicates the air outlet 122 of the second tank 120 with the first opening 133, so as to convey the air in the second tank 120 to the first pipe 310. The second pipe 320 communicates the second opening 134 with the air return opening 113 of the first tank 110. The air in the second tank 120 is sequentially transferred to the first tank 110 through the first pipe 310 and the return air duct 131.

In this embodiment, the protruding rib 132 is bent, and a portion of the protruding rib extends toward the second tank container 120, and another portion of the protruding rib extends toward the first tank container 110. In the present embodiment, a part of the protruding bead 132 extends in the up-down direction, and another part extends in the left-right direction.

An air supply passage 231 is formed in the partition plate 230, and the air supply passage 231 communicates with the inner spaces of the first tank 110 and the third tank 130, respectively.

In this embodiment, one end of the second air supply duct 220 is connected to the second air supply port 112 of the first casing 110, and the other end is communicated with the air supply duct 231. An air outlet 232 is formed in a front side surface of the partition 230 to communicate with the air supply passage 231, and the first tank 110 supplies air to the third tank 130 through the second air supply pipe 220, the air supply passage 231, and the air outlet 232.

Fig. 11 is a schematic structural view of a cover plate 240 according to an embodiment of the refrigerator of the present invention. Fig. 12 is a schematic view of a combined structure of a cover plate 240 and a partition 230 according to an embodiment of the refrigerator of the present invention.

Referring to fig. 11 and 12, in the present embodiment, a cover plate 240 is disposed on the front side of the partition plate 230, and the cover plate 240 is clamped in the third container 130 to limit and support the partition plate 230; the front side of the cover 240 is provided with a window 241 communicated with the air outlet 232.

In this embodiment, two air outlets 232 are disposed on the partition 230 at intervals along the vertical direction, and two windows 241 are correspondingly disposed on the cover plate 240.

The cover plate 240 is provided with a fastening structure, and the third container 130 is provided with a corresponding fastening position, and the fastening structure and the fastening position are matched to fix the cover plate 240 in the third container 130. The cover plate 240 is provided with a step structure, the partition plate 230 is correspondingly provided with a step structure, and the step structure on the cover plate 240 is matched with the step structure on the partition plate 230 to support and limit the partition plate 230 on the cover plate 240.

Fig. 13 is a schematic structural diagram of a first pipe 310 according to an embodiment of the refrigerator.

Referring to fig. 2 to 13, the first pipe 310 is attached to the rear side walls of the outer sides of the third tank container 130 and the second tank container 120, and envelops one end of the protruding rib 132 facing the first pipe 310; the first pipe 310 is provided with a protrusion 311 protruding forward, and the protrusion 311 is sandwiched between the second tank 120 and the third tank 130.

The protrusion 311 of the first pipe 310 extends along the horizontal direction, and the protrusion 311 is clamped between the second tank container 120 and the third tank container 130, so that the first pipe 310 is stably fixed in the tank 100, and the first pipe 310 fully utilizes the space in the tank 100.

The first pipe 310 is provided with a passage for communicating the first pipe 310 with the air outlet 122 and the first opening 133 of the second tank 120, so as to communicate the second tank 120 with the return air passage 131. The first pipe member 310 is made of a foam material.

Fig. 14 is a schematic structural view of a second pipe 320 according to an embodiment of the refrigerator of the present invention.

Referring to fig. 2 to 14, the second pipe 320 is attached to the rear side walls of the outer sides of the first tank container 110 and the third tank container 130, and envelops an end of the protruding rib 132 facing the first tank container 110; the second pipe 320 is provided with a protrusion 321 protruding forward, and the protrusion 321 is sandwiched between the first tank 110 and the third tank 130. The outlet of the second pipe 320 is opened on the protrusion 321 to correspond to the air return opening 133.

The second pipe 320 communicates the second opening 134 of the return air passage 131 with the return air opening 113 of the first tank 110 to communicate the return air passage 131 with the first tank 110. The first pipe member 310 is made of a foam material.

Based on the above description, the cooling energy in the first tank container 110 is transmitted to the second tank container 120 through the first blast pipe 210, and the second tank container 120 is cooled. The air in the second tank 120 sequentially passes through the first pipe 310, the return air passage 131, and the second pipe 320, and returns to the first tank 110, thereby forming a refrigeration circuit between the first tank 110 and the second tank 120.

The cooling energy in the second tank container 120 is transmitted to the third tank container 130 through the second blast pipe 220 to cool the third tank container 130. An air return duct is provided between a side wall of the third tank container 130 facing the first tank container 110 and a side wall of the first tank container 110 facing the third tank container 130, and a refrigeration circuit is formed between the first tank container 110 and the third tank container 130.

In the present invention, the refrigerating assembly is used to provide cold energy into the first tank container 110, so as to refrigerate the first tank container 110. The second tank liner 120 and the third tank liner 130 are respectively communicated with the first tank liner 110 so as to supply air to the second tank liner 120 and the third tank liner 130, respectively, and cool the second tank liner 120 and the third tank liner 130.

The second tank 120 communicates with the first tank 110. The partition 230 is attached to the inner rear side wall of the third tank container 130, and a return air channel 131 is formed between the partition and the rear side wall of the third tank container 130, two ends of the return air channel 131 are respectively communicated with the inner spaces of the first tank container 110 and the second tank container 120, the cold energy in the first tank container 110 enters the second tank container 120, after the second tank container 120 is refrigerated, the air in the second tank container 120 enters the first tank container 110 through the return air channel 131, and a circulation loop is formed among the first tank container 110, the second tank container 120 and the return air channel 131. An air supply passage 231 communicating the first tank 110 and the third tank 130 is formed in the partition plate 230. The return air channel 131 of the second tank container 120 is formed between the partition plate 230 and the side wall of the third tank container 130, the air supply channel 231 of the third tank container 130 is formed in the partition plate 230, and the partition plate 230 and the third tank container 130 are fully utilized, so that the air duct structure 200 in the box body 100 occupies a smaller space, uses less materials, and saves cost.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A refrigerator, characterized by comprising:

the box body is internally provided with a first box container, a second box container and a third box container; the front sides of the first box container, the second box container and the third box container are open; the second tank container and the third tank container are arranged on the same side of the first tank container at intervals along a first direction; the second tank container and the third tank container are arranged at intervals along a second direction; the second direction is perpendicular to the first direction; the second tank container is communicated with the first tank container;

the refrigerating assembly is used for providing cold energy into the first box liner;

the partition board is attached to the rear side wall of the inner side of the third box container, a return air channel is formed between the partition board and the rear side wall of the third box container, and two ends of the return air channel are respectively communicated with the inner spaces of the first box container and the second box container; and an air supply channel is formed in the partition plate and is respectively communicated with the inner spaces of the first tank container and the third tank container.

2. The refrigerator according to claim 1, wherein a rear side wall inside the third tank container protrudes rearward to form a protruding rib, a front side of which is opened; the air return channel is formed between the partition plate and the protruding ribs.

3. The refrigerator as claimed in claim 2, wherein the protruding ribs are bent to extend partially toward the second tank container and partially toward the first tank container.

4. The refrigerator according to claim 2 or 3, wherein a first pipe is provided between the second tank container and the third tank container; the protruding ribs penetrate through the third tank container along a second direction towards one side of the second tank container to form a first opening; an air outlet is formed in the part, close to the third box container, of the side wall of the second box container; the first pipe fitting is communicated with the air outlet and the first opening.

5. The refrigerator according to claim 4, wherein the first pipe fits to the rear side wall of the outside of the third and second tank liners and envelops an end of the protruding rib facing the first pipe; the first pipe is provided with a protruding part protruding forwards, and the protruding part is clamped between the second tank container and the third tank container.

6. The refrigerator according to claim 2 or 3, wherein a second pipe is provided between the second tank liner and the third tank liner; the protruding rib penetrates through the third tank container along a first direction towards one side of the first tank container to form a second opening; an air return opening is formed in the part, close to the third box container, of the side wall of the first box container; the second pipe fitting is communicated with the air return opening and the second opening.

7. The refrigerator according to claim 6, wherein the second pipe fits to the rear side walls of the outer sides of the first and third tank liners and envelops an end of the protruding rib facing the first tank liner; the second pipe fitting is provided with a protruding part protruding forwards, and the protruding part is clamped between the first tank container and the third tank container.

8. The refrigerator as claimed in claim 7, wherein the air return opening is opened on a side wall of the first tank container facing the third tank container, and the outlet of the second pipe is opened on the protrusion to correspond to the air return opening.

9. The refrigerator as claimed in claim 1, wherein an air outlet communicating with the air supply passage is formed at a front side surface of the partition plate; a cover plate is covered on the front side surface of the partition plate and clamped in the third tank container to limit and support the partition plate; the front side surface of the cover plate is provided with a window communicated with the air outlet.

10. The refrigerator according to claim 1, wherein a first air supply pipe is provided between the first and second casings, and a second air supply pipe is provided between the first and third casings; the first air supply pipe is clamped between the first box container and the second box container, and the second air supply pipe is positioned in an interval between the first box container and the third box container.

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