Refrigeration equipment

Abstract

The present invention provides a refrigeration device, comprising a first chamber, a second chamber, a refrigeration assembly arranged in the first chamber, and an air duct assembly that cooperates with the refrigeration assembly to supply and return air to the second chamber, wherein the air duct assembly comprises an air supply structure and an air return structure that are integrally arranged, the air supply structure is arranged in a foaming cavity between the first chamber and the second chamber, and the air supply structure connects the first chamber and the second chamber in a height direction so as to deliver cold from the first chamber to the second chamber. The present invention can not only improve the efficiency of the installation of the air duct assembly, but also improve the volume ratio of the refrigeration device.

Description

Technical Field

[0001] The invention relates to a refrigeration device, in particular to a refrigeration device with a simple structure. Background Art

[0002] Existing refrigeration equipment usually adopts air cooling to improve refrigeration efficiency. Among them, the air duct structure of the air-cooled refrigeration equipment includes an air supply structure and a return air structure. As user needs gradually increase, the capacity of the refrigerator is also getting larger and larger. Usually, more compartments are set up to meet the needs, and a variable temperature chamber is usually added on the basis of the freezer and refrigerator. Correspondingly, it is necessary to set a separate air supply structure and a return air structure for each compartment to meet the normal refrigeration cycle.

[0003] In order to improve the installation efficiency of the air supply structure and the return air structure, the air supply structure and the return air structure are usually integrated. However, the air supply structure is usually connected to the rear side of the inner tank and occupies more space on the rear side of the inner tank, making the refrigerator capacity smaller. Moreover, especially when the freezer, refrigerator and variable temperature chamber are arranged in the up and down direction, the air supply structure of the upper compartment passes through the back of the middle compartment, which makes the air supply structure larger, inconvenient to install, and has a higher cost.

[0004] In view of this, it is necessary to improve the existing refrigeration equipment to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a refrigeration device with a simple structure.

[0006] To achieve the above-mentioned object of the invention, the present invention provides a refrigeration device, comprising a first chamber, a second chamber, a refrigeration assembly arranged in the first chamber, and an air duct assembly cooperating with the refrigeration assembly to supply and return air to the second chamber, wherein the air duct assembly comprises an air supply structure and an air return structure that are integrally arranged, the air supply structure is arranged in a foaming cavity between the first chamber and the second chamber, and the air supply structure connects the first chamber and the second chamber in a height direction so as to deliver cold energy from the first chamber to the second chamber;

[0007] The first chamber and the second chamber are spaced apart in the height direction, the return air structure extends in the height direction and is arranged on one side of the first chamber and the second chamber, and the air supply structure is connected to the return air structure in the transverse direction;

[0008] The refrigeration device further includes a third chamber disposed above the second chamber, the air supply structure includes a first air supply structure connected to the return air structure and a second air supply structure, the first air supply structure is disposed in a foaming cavity between the first chamber and the second chamber to deliver the coldness of the first chamber to the second chamber, and the second air supply structure is disposed in a foaming cavity between the second chamber and the third chamber to deliver the coldness in the second chamber to the third chamber;

[0009] The first chamber, the second chamber and the third chamber also have a forward recessed paving portion at the rear side, respectively, and the paving portion partially limits the air duct assembly in the front-to-back direction and the transverse direction. The refrigeration device also includes an outer shell arranged on the outside of the inner tank, and a back plate matched with the inner tank and the outer shell. One side of the air duct assembly in the transverse direction is in contact with the inner wall of the outer shell, and the rear side is in contact with the inner wall of the back plate.

[0010] As a further improvement of the present invention, the first chamber is a freezing chamber, the second chamber is a temperature-changing chamber, and the third chamber is a refrigerating chamber.

[0011] As a further improvement of the present invention, the first air supply structure has a first air supply outlet that penetrates and connects the first chamber and the second chamber along the height direction, and the second air supply structure has a second air supply outlet that penetrates and connects the second chamber and the third chamber along the height direction, and the number of the first air supply outlets is greater than the number of the second air supply outlets.

[0012] As a further improvement of the present invention, the air duct assembly includes a foam seat, a foam cover matching the foam seat, and a fixing structure fixedly connecting the foam seat and the foam cover, wherein the fixing structure includes a positioning portion protruding from one of the foam seat and the foam cover, and a positioning groove recessed from the other to match the positioning portion.

[0013] As a further improvement of the present invention, the air supply structure and the return air structure also include a sealing structure formed between the foam seat and the foam cover, the sealing structure includes a protruding portion protruding from one of the foam seat and the foam cover, and a groove recessed from the other to cooperate with the protruding portion, a supply air path and a return air path are formed between the foam seat and the foam cover, and the protruding portion is arranged beside the supply air path and the return air path.

[0014] As a further improvement of the present invention, the return air structural member is an integrated structure for returning air to the second chamber and the third chamber, a return air path is formed between the foam seat and the foam cover, and the air duct assembly also includes a partition protruding from the foam seat and / or the foam cover to separate the return air path.

[0015] As a further improvement of the present invention, the partitions are formed by protruding from the foam seat and / or the foam cover toward each other, and the ends of the two partitions respectively have a convex portion and a concave portion that match each other.

[0016] As a further improvement of the present invention, a supply air path and a return air path are formed between the foam seat and the foam cover, and the air duct assembly also includes a reinforcement portion protruding from the foam seat and / or the foam cover and formed in the supply air path and / or the return air path.

[0017] Beneficial effects of the present invention: The air duct assembly of the refrigeration equipment of the present invention is provided by integrating the air supply structure and the return air structure, and the air supply structure is provided in the foaming cavity between the first chamber and the second chamber. Therefore, it can not only improve the efficiency of the installation of the air duct assembly, but also improve the volume ratio of the refrigeration equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a first embodiment of a refrigeration device of the present invention.

[0019] Figure 2 yes Figure 1 A three-dimensional diagram showing the hidden shell and back panel.

[0020] Figure 3 yes Figure 2 Exploded three-dimensional diagram.

[0021] Figure 4 yes Figure 2 A three-dimensional diagram from another perspective.

[0022] Figure 5 yes Figure 4 Exploded three-dimensional diagram.

[0023] Figure 6 yes Figure 3 A three-dimensional exploded view of the integrated return air structure.

[0024] Figure 7 yes Figure 6 Another perspective exploded view.

[0025] Figure 8 yes Figure 3 A three-dimensional schematic diagram of the integrated return air structure from another perspective.

[0026] Fig. 9 yes Figure 8 Exploded three-dimensional diagram.

[0027] Fig.10 yes Figure 1 Cross-sectional view along AA direction.

[0028] Fig.11 It is a three-dimensional schematic diagram of a second embodiment of the refrigeration device of the present invention.

[0029] Fig.12 yes Fig.11Schematic diagram of the central air duct assembly.

[0030] Fig.13 yes Fig.11 A three-dimensional diagram from another perspective. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, the embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on the embodiments are all within the protection scope of the present invention.

[0032] Please refer to Figures 1 to 13 The embodiment of the refrigeration device of the present invention is shown, and the refrigeration device includes a first chamber 1, a second chamber 2, a refrigeration component (not shown) arranged in the first chamber 1, and an air duct component that cooperates with the refrigeration component to supply and return air to the second chamber 2, wherein the air duct component includes an air supply structure and an air return structure that are integrally arranged, and the air supply structure is arranged in a foaming cavity between the first chamber 1 and the second chamber 2, and the air supply structure connects the first chamber 1 and the second chamber 2 in the height direction so as to deliver cold from the first chamber 1 to the second chamber 2.

[0033] Specifically, Figure 1 and Figure 2 The figure shows the first embodiment of the refrigeration device of the present invention. In this embodiment, the refrigeration device is a refrigerator, specifically a three-door refrigerator arranged at intervals along the height direction, wherein the first chamber 1, the second chamber 2, and the third chamber 3 are a freezer, a variable temperature chamber, and a refrigeration chamber (the figure only shows part of each chamber). And from top to bottom along the height direction of the refrigerator, there are the refrigeration chamber, the variable temperature chamber, and the freezer. Of course, the variable temperature chamber and the refrigeration chamber can also be arranged above the freezer at intervals along the horizontal direction. In other embodiments, the refrigerator can also be a double-door refrigerator, a side-by-side refrigerator, a French refrigerator, or other types of refrigerators, and the refrigeration device can also be a freezer.

[0034] In this embodiment, the return air structure is an integrated return air structure for returning air to the second compartment 2 and the third compartment 3, that is, an integrated return air structure 4. The integrated return air structure 4 is extended along the height direction and arranged on one side of the second compartment 2 and the third compartment 3. The integrated return air structure 4 has a first return air inlet 41 and a second return air inlet 42 respectively connected to the second compartment 2 and the third compartment 3, and a return air outlet 43 connected to the first compartment 1. Therefore, the integrated return air structure 4 can return air to both the second compartment 2 and the third compartment 3, thereby avoiding the need to separately set up return air structures for the second compartment 2 and the third compartment 3, thereby saving costs, reducing the space occupied by the return air structure, and facilitating improving the volume ratio of the refrigerator.

[0035] Meanwhile, in order to ensure the volumetric ratio, conventional refrigerators usually recess the middle of the inner tank backwards to install an air supply structure for cooling the compartments. However, the present invention extends the integrated return air structure 4 along the height direction to one side of the second compartment 2 and the third compartment 3, thereby avoiding the problem that the integrated return air structure 4 is arranged in the middle, which causes the refrigerator to be too thick in the front-to-back direction. This is beneficial to the miniaturized design of the refrigerator while ensuring the volumetric ratio of the refrigerator.

[0036] Moreover, since the second chamber 2 is a variable temperature chamber and is arranged below the third chamber 3 which is a refrigerating chamber, when the second chamber 2 is used for freezing, the internal temperature thereof is lower than 0 degrees, and the return air temperature thereof is often lower than 0 degrees, so that the first return air inlet 41 is closer to the return air outlet 43 in the height direction, that is, the distance between the first return air inlet 41 and the return air outlet 43 in the height direction is smaller than the distance between the second return air inlet 42 and the return air outlet 43 in the height direction, thereby making the return air of the second chamber 2 affect the return air of the third chamber 3 as little as possible, and reducing the risk of frost and freezing of the return air structural components by the humid hot air of the return air of the third chamber 3.

[0037] Of course, in other embodiments, if the second chamber 2 and the third chamber 3 are arranged above the first chamber 1 in the transverse direction, the integrated return air structure 4 can also be applied, and it is only necessary to readjust the structure and the installation position. For example, the integrated return air structure 4 is arranged in a "T"-shaped structure at the rear side of the second chamber 2 and the third chamber 3 and is located in the middle position. In this way, the distance between the first return air inlet 41 and the second return air inlet 42 is relatively close, which is conducive to the miniaturization of the integrated return air structure 4. Or the integrated return air structure 4 is arranged in an "L"-shaped structure, and the part extending in the transverse direction can be arranged in the foaming layer space between the second chamber 2, the third chamber 3 and the first chamber 1, and the part extending in the height direction can be arranged on one side of the transverse direction as in this embodiment.

[0038] like Figures 6 to 9 As shown, in this embodiment, the integrated air return structure 4 includes a foam seat 44 and a foam cover 45 that are installed in cooperation with each other in the front-to-back direction, and a fixing structure that fixes the foam seat 44 and the foam cover 45, and the fixing structure includes a positioning portion 461 protruding from one of the foam seat 44 and the foam cover 45, and a positioning groove 462 that is recessed from the other to cooperate with the positioning portion 461. Therefore, through the above structure, the integrated air return structure 4 has a simple structure, low cost, and is easy to install.

[0039] The integrated return air structure 4 further includes a sealing structure formed between the foam seat 44 and the foam cover 45, the sealing structure includes a protruding portion 471 protruding from one of the foam seat 44 and the foam cover 45, and a groove 472 recessed from the other to match the protruding portion 471, a return air path for the return air of the second chamber 2 and the third chamber 3 is formed between the foam seat 44 and the foam cover 45, and the protruding portion 471 is arranged beside the return air path. By arranging the protruding portion 471 and the groove 472, the return air can be effectively reduced from leaking out of the gap between the foam seat 44 and the foam cover 45, thereby ensuring the normal circulation of the refrigeration system.

[0040] In this embodiment, the integrated return air structure 4 further has a reinforcing portion 48 disposed in the return air passage, the reinforcing portion 48 protrudes from the foam seat 44 and / or the foam cover 45, and is disposed near the second return air inlet 42. By providing the reinforcing portion 48, the risk of the foaming material squeezing the foam seat 44 or the foam cover 45 and being damaged during the foaming process can be reduced.

[0041] Since the second chamber 2 is a variable temperature room, when the second chamber 2 is used as a freezer, the return air temperature of the second chamber 2 is relatively low, which easily affects the return air of the third chamber 3, thereby causing the return air duct to freeze. Therefore, the integrated return air structure 4 of the present invention also includes a temperature control device arranged in the return air duct, and the temperature control device is used to prevent the return air temperature of the second chamber 2 and the return air temperature of the third chamber 3 from interfering with each other, thereby reducing the risk of the return air duct freezing.

[0042] Specifically, the return air path includes a first return air path 49 matched with the second compartment 2 and a second return air path 410 matched with the third compartment 3. The temperature control device is a partition 411 protruding from the foam seat 44 and / or the foam cover 45 to separate the first return air path 49 from the second return air path 410. In this embodiment, the partition 411 is formed by protruding from the foam seat 44 and the foam cover 45 respectively. The partition 411 is a foam structure, which can effectively avoid direct contact between the return air of the second compartment 2 and the return air of the third compartment 3, thereby reducing the risk of freezing of the second return air path 410. Among them, the partition 411 can not only realize the above functions, but also play the role of strengthening the structure. The reinforcement part 48 is arranged in the second return air path 410 and is arranged close to the second return air inlet 42, so as to cooperate with the partition 411 in the height direction to jointly provide the function of structural strengthening.

[0043] Furthermore, in order to ensure that the partition 411 can effectively prevent the return air of the second chamber 2 from directly contacting the return air of the third chamber 3, the two partitions 411 are provided with a convex portion 412 and a concave portion 413 that cooperate with each other, so as to seal the end of the partition 411, thereby reducing the risk of direct contact between the return air of the second chamber 2 and the return air of the third chamber 3. Of course, in other embodiments, when the partition 411 protrudes from one of the foam seat 44 and the foam cover 45, the other may also be provided with a concave portion 412 that cooperates with the partition 411.

[0044] To further reduce the return air interference of the second chamber 2 on the return air of the third chamber 3, resulting in the risk of freezing of the second return air duct 410. The refrigeration device of the present invention also includes a heating element (not shown) arranged in the return air duct. Through the cooperation between the heating element and the partition 411, the risk of freezing of the second return air duct 410 is minimized. Of course, in other embodiments, the heating element and the partition 411 can be provided separately, which can be adjusted according to actual needs. When the heating element is provided separately, the heating element can be provided on the inner wall of the return air duct, or the integrated return air structure 4 includes a mounting portion for mounting the heating element.

[0045] Specifically, the heating element is disposed on the surface or inside of the partition 411. In this embodiment, the heating element is disposed inside the partition 411, that is, the mounting portion is the partition 411, thereby improving the integrity of the integrated return air structure 4. Since the heating element is generally a metal structure, the risk of the heating element directly contacting the humid return air can also be reduced, thereby reducing the risk of oxidation of the heating element and increasing the service life of the heating element.

[0046] In this embodiment, the refrigeration assembly includes a compressor, a condenser, a dew-removing pipe, a capillary tube and an evaporator connected to each other, and the heating element is connected between the condenser and the dew-removing pipe, or between the dew-removing pipe and the capillary tube. The temperature of the high-temperature gas is used to heat the return air of the second chamber 2 and the third chamber 3, thereby reducing the risk of freezing of the second return air duct 410. Of course, in other embodiments, the heating element can be connected to the condenser or the dew-removing pipe through a heat transfer element, for example: connected through a heat pipe. Alternatively, the heating element is heated by power control.

[0047] like Figures 11 to 13As shown, in order to further improve the efficiency of the installation of the air duct assembly and further improve the volume ratio of the refrigerator, the refrigeration device of the present invention also provides a second embodiment, which is different from the first embodiment in that the air supply structure and the integrated return air structure 4 are also integrated, so that when assembling the air duct assembly, only one installation is required, which is very efficient. Therefore, it is only necessary to slightly adjust the foam seat 44 and the foam cover 45 so that the two cooperate with each other to form the air supply structure and the integrated return air structure 4.

[0048] Specifically, the air supply structure includes a first air supply structure 5 and a second air supply structure 6 connected to the integrated return air structure 4, the first air supply structure 5 is arranged in the foaming cavity between the first chamber 1 and the second chamber 2 to supply air to the second chamber 2, and the second air supply structure 6 is arranged in the foaming cavity between the second chamber 2 and the third chamber 3 to supply air to the third chamber 3. That is, the first air supply structure 5 and the second air supply structure 6 are respectively connected to the integrated return air structure 4 in the transverse direction. And the above sealing structure is also applicable to the air supply structure, thereby reducing the risk of air leakage and ensuring stable and reliable refrigeration.

[0049] Through the above arrangement, the foaming layer space between the first chamber 1 and the second chamber 2, and between the second chamber 2 and the third chamber 3 can be fully utilized to install the first air supply structure 5 and the second air supply structure 6, which greatly reduces the thickness of the first air supply structure 5 and the second air supply structure 6 protruding from the rear side of the inner tank, which is conducive to the miniaturized design of the refrigerator. At the same time, there is no need for the inner tank to make too much concession to the first air supply structure 5 and the second air supply structure 6, thereby ensuring the volume ratio of the refrigerator. Moreover, since the first air supply structure 5 and the second air supply structure 6 occupy the foaming layer space, the air supply structure itself can also serve as a foaming layer. Therefore, the use of foaming material in the foaming process of the refrigerator can be reduced to a certain extent.

[0050] Of course, in other embodiments, the first air supply structure 5 and the second air supply structure 6 can also be installed separately, and do not need to be set together with the integrated return air structure 4. Among them, when the second chamber 2 and the third chamber 3 are arranged above the first chamber 1 in the transverse direction, it is not necessary to set two air supply structures, and they can be directly arranged in the foaming layer space between the second chamber 2 and the third chamber 3. The foaming layer space is a space extending in the height direction, and then it is only necessary to open air supply ports corresponding to the second chamber 2 and the third chamber 3 on the left and right sides of the air supply structure.

[0051] In this embodiment, since the first air supply structure 5 and the second air supply structure 6 are arranged in the foaming layer space between the first chamber 1 and the second chamber 2, and between the second chamber 2 and the third chamber 3, the air supply to the second chamber 2 is directly supplied through the first chamber 1, but the air supply to the third chamber 3 is not directly supplied by the first chamber 1, but is supplied to the second chamber 2 through the first chamber 1, and then supplied to the third chamber 3 through the second air supply structure 6 from the second chamber 2. In a traditional multi-compartment refrigerator, each chamber is provided with an air supply structure connected to the freezer, and the number of air supply structures is large, the structure is large, and the arrangement is complex. Therefore, compared with a traditional multi-compartment refrigerator, the present invention greatly reduces the structural size of the air supply structure, making the structure compact, reducing costs, and improving installation efficiency.

[0052] In this embodiment, since the second chamber 2 is a variable temperature chamber and the third chamber 3 is a refrigerated chamber, the temperature in the second chamber 2 can meet the demand of the third chamber 3. Therefore, the coldness in the second chamber 2 is sent to the third chamber 3 without affecting the storage of items in the third chamber 3.

[0053] Among them, the first air supply structure 5 has a first air supply port 51 connected to the first compartment 1 and the second compartment 2, and the second air supply structure 6 has a second air supply port 61 connected to the second compartment 2 and the third compartment 3. In this embodiment, the number of the first air supply ports 51 is greater than the number of the second air supply ports 61. Therefore, when the second compartment 2 needs to be frozen, the first air supply port 51 helps to reduce the temperature of the second compartment 2 more quickly, while the number of the second air supply ports 61 is relatively small, and even if the temperature in the second compartment 2 is low, it is not easy to freeze the food in the third compartment 3. Of course, a damper structure can also be set in the first air supply port 51 and the second air supply port 61 to adjust the air supply and further improve the temperature control accuracy. Of course, in other embodiments, the number of the first air supply port 51 and the second air supply port 61 can also be equal, as long as the first air supply port 51 is larger than the second air supply port 61.

[0054] In this embodiment, in order to facilitate the installation of the air duct assembly, the first chamber 1, the second chamber 2 and the third chamber 3 are respectively provided with a forward recessed paving portion 11 on the rear side. Therefore, on the one hand, it is convenient for the first air supply structure 5 and the second air supply structure 6 to be installed in the foaming layer space. On the other hand, the paving portion 11 partially limits the air duct assembly in the front-to-back direction and the lateral direction to prevent excessive installation and avoid damage to the air duct assembly.

[0055] The refrigeration device also includes a shell 7 arranged on the outside of the inner tank, and a back plate 8 matched with the inner tank and the shell 7. When assembling, the inner tank and the shell 7 are first assembled with each other, and then the air duct assembly is installed, and the other side of the air duct assembly along the lateral direction is fitted with the inner wall of the shell 7, and finally the back plate 8 is installed, and the rear side of the air duct assembly is fitted with the inner wall of the back plate 8. Therefore, the shell 7, the back plate 8 and the yielding part 11 together realize the positioning of the air duct assembly, so there is no need to set additional fixings to fix the air duct assembly, which greatly improves the installation efficiency. At the same time, when the refrigerator completes the foaming, the solidification of the foaming material can also further strengthen the fixation of the air duct assembly, ensuring the stability and reliability between the air duct assembly and each compartment.

[0056] like Fig.10 As shown, in order to further improve the fixing effect, structural strength and heat insulation effect of the air duct assembly, the side of the air duct assembly that matches the inner wall of the shell 7 and the inner wall of the back plate 8 is set in a non-planar manner. Specifically, the side and / or back of the air duct assembly is set in a wavy shape, that is, uneven. Therefore, during the foaming process, the air duct assembly can have more contact surfaces with the foaming material, thereby improving the fixing effect. Not only that, due to the wave structure, the air duct assembly can also be limited to prevent movement. This is because when the foaming material is solidified, the structure of the foaming layer is set in a concave-convex manner with the wave structure, thereby limiting the position. In addition, the protruding structure increases the thickness to a certain extent, thereby improving the structural strength and heat insulation effect.

[0057] In this embodiment, the wave structures are arranged at intervals in the upper and lower directions. Of course, in other embodiments, the wave structures may also be arranged at intervals in the front-to-back direction, or may be arranged in combination in two directions.

[0058] To ensure that the installation position of the air duct assembly can be effectively fixed, so as to avoid the air duct structure being offset after the back plate 8 is installed, which eventually leads to the failure of the foaming process to normally fill the surface of the air duct assembly. The length of the protruding portion of the above-mentioned wave structure can be increased, so that when the air duct assembly is installed, the protruding portion abuts against the inner wall of the shell 7 and the inner wall of the back plate 8, and then the air duct assembly is directly fixed by the giving portion 11 and the inner wall of the shell 7, and the air duct assembly will not be offset even after the back plate 8 is installed. Of course, the protruding portion of the wave structure can be enlarged in full or in part.

[0059] In addition, the present invention also provides another method, that is, a plurality of fixing parts 9 can be protruded on the side wall and the back of the air duct assembly so as to respectively abut against the inner wall of the shell 7 and the inner wall of the back plate 8, and the fixing part 9 is also recessed with a wiring groove 91 to facilitate the wiring of the wiring harness.

[0060] In summary, the air duct assembly of the refrigeration equipment of the present invention is provided by integrating the air supply structure and the return air structure, and the air supply structure is provided in the foaming cavity between the first chamber 1 and the second chamber 2. Therefore, not only the installation efficiency of the air duct assembly can be improved, but also the volume ratio of the refrigeration equipment can be improved.

[0061] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A refrigeration device, comprising a first chamber, a second chamber, a refrigeration assembly disposed in the first chamber, and an air duct assembly that cooperates with the refrigeration assembly to supply and return air to the second chamber, characterized in that: The air duct assembly includes an air supply structure and an air return structure that are integrally arranged, wherein the air supply structure is arranged in a foaming cavity between the first chamber and the second chamber, and the air supply structure connects the first chamber and the second chamber in a height direction so as to deliver cold energy from the first chamber to the second chamber; The first chamber and the second chamber are spaced apart in the height direction, the return air structure extends in the height direction and is arranged on one side of the first chamber and the second chamber, and the air supply structure is connected to the return air structure in the transverse direction; The refrigeration device further includes a third chamber disposed above the second chamber, the air supply structure includes a first air supply structure connected to the return air structure and a second air supply structure, the first air supply structure is disposed in a foaming cavity between the first chamber and the second chamber to deliver the coldness of the first chamber to the second chamber, and the second air supply structure is disposed in a foaming cavity between the second chamber and the third chamber to deliver the coldness in the second chamber to the third chamber; The first chamber, the second chamber and the third chamber also have a forward recessed paving portion at the rear side, respectively, and the paving portion partially limits the air duct assembly in the front-to-back direction and the transverse direction. The refrigeration device also includes an outer shell arranged on the outside of the inner tank, and a back plate matched with the inner tank and the outer shell. One side of the air duct assembly in the transverse direction is in contact with the inner wall of the outer shell, and the rear side is in contact with the inner wall of the back plate.

2. The refrigeration device according to claim 1, characterized in that: The first chamber is a freezing chamber, the second chamber is a temperature-changing chamber, and the third chamber is a refrigerating chamber.

3. The refrigeration device according to claim 1, characterized in that: The first air supply structure has a first air supply port that penetrates and connects the first chamber and the second chamber in the height direction, and the second air supply structure has a second air supply port that penetrates and connects the second chamber and the third chamber in the height direction, and the number of the first air supply ports is greater than the number of the second air supply ports.

4. The refrigeration device according to claim 1, characterized in that: The air duct assembly includes a foam seat, a foam cover matched with the foam seat, and a fixing structure fixedly connecting the foam seat and the foam cover. The fixing structure includes a positioning portion protruding from one of the foam seat and the foam cover, and a positioning groove recessed from the other to match the positioning portion.

5. The refrigeration device according to claim 4, characterized in that: The air supply structure and the return air structure also include a sealing structure formed between the foam seat and the foam cover, the sealing structure includes a protruding portion protruding from one of the foam seat and the foam cover, and a groove recessed from the other to cooperate with the protruding portion, a supply air path and a return air path are formed between the foam seat and the foam cover, and the protruding portion is arranged beside the supply air path and the return air path.

6. The refrigeration device according to claim 4, characterized in that: The return air structural member is an integrated structure for returning air to the second chamber and the third chamber, a return air path is formed between the foam seat and the foam cover, and the air duct assembly also includes a partition protruding from the foam seat and / or the foam cover to separate the return air path.

7. The refrigeration device according to claim 6, characterized in that: The partitions are formed by protruding from the foam seat and / or the foam cover toward each other, and the ends of the two partitions are respectively provided with a convex part and a concave part that match each other.

8. The refrigeration device according to claim 5, characterized in that: An air supply path and an air return path are formed between the foam seat and the foam cover, and the air duct assembly further comprises a reinforcing portion protruding from the foam seat and / or the foam cover and formed in the air supply path and / or the air return path.

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