Refrigeration equipment

Abstract

The utility model discloses refrigeration equipment, and relates to the technical field of refrigeration, the refrigeration equipment comprises a liner body, a heat exchanger and an air duct assembly, the liner body is provided with a first chamber and a second chamber, and the first chamber comprises a first storage chamber and a heat exchanger chamber; the heat exchanger is arranged in the heat exchanger chamber and provided with a first side and a second side, the first side deviates from the rear wall of the container body, and the second side and the first side are located on the two adjacent sides of the heat exchanger. The air duct assembly is provided with a first air supply duct, a first air return duct and a second air return duct, the first air supply duct communicates with the first storage chamber and the heat exchanger chamber, the first air return duct and the second air return duct communicate with the second chamber and the heat exchanger chamber, the first air return duct and the first air supply duct are arranged on the first side and integrally formed, and the second air return duct is arranged on the first side or the second side. The first air supply duct and the first air return duct are integrated in the first air duct body, so that the air duct design is more compact, the occupation of the internal space of the container body is reduced, and the storage space can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to a refrigeration device. Background Art

[0002] Refrigerators are essential household appliances in our daily lives. Air-cooled refrigerators currently dominate the consumer market due to their inherent resistance to frost buildup. Air-cooled refrigerators require an air duct system to control the circulation of cold air, and the return air structure is a crucial component of this duct system.

[0003] For the built-in refrigerators currently popular on the market, very high storage capacity is required, but the traditional air duct structure takes up a lot of internal space, especially the refrigerated return air structure, which needs to be connected from one compartment to another, taking up a large space and affecting the storage capacity of the built-in refrigerator. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a refrigeration device that can reduce the space occupied by the return air duct in the internal space of the refrigeration device, thereby increasing the storage capacity of the refrigeration device.

[0005] The utility model also provides a refrigeration device having the above-mentioned refrigeration device.

[0006] The refrigeration device according to the embodiment of the present invention includes:

[0007] The body is provided with a first chamber and a second chamber, wherein the first chamber includes a first storage chamber and a heat exchanger chamber;

[0008] a heat exchanger disposed in the heat exchanger chamber, the heat exchanger having a first side and a second side, the first side facing away from the rear wall of the bladder body, and the second side and the first side being located on adjacent sides of the heat exchanger;

[0009] The air duct assembly is provided with a first air supply duct, a first return air duct and a second return air duct, the first air supply duct is connected to the first storage chamber and the heat exchanger chamber, the first return air duct and the second return air duct are both connected to the second chamber and the heat exchanger chamber, the first return air duct and the first air supply duct are both arranged on the first side and are integrally formed, and the second return air duct is arranged on the first side or the second side.

[0010] The refrigeration equipment according to the embodiment of the present utility model has at least the following beneficial effects:

[0011] By integrally forming the first return air duct and the first supply air duct, the first return air duct and the first supply air duct are integrated into the same duct body, thereby simplifying the overall structure of the duct assembly and making the entire duct design more compact, which can reduce the occupation of the internal space of the duct body and increase the storage space. Moreover, the present application arranges both the first return air duct and the first supply air duct on the first side of the heat exchanger, that is, the first return air duct and the first supply air duct are both located on the front side of the heat exchanger. Compared with traditional refrigerators that arrange the return air duct on the back of the evaporator or pre-embed the return air duct in the foam layer of the refrigerator, the first return air duct utilizes the space on the front side of the heat exchanger, without increasing the thickness of the foam layer of the refrigeration equipment, and without reserving installation space on the back side of the heat exchanger, which can effectively increase the storage space of the refrigeration equipment.

[0012] Furthermore, the present invention also provides a second return air duct, which together with the first return air duct returns air to the second chamber, thereby increasing the return air output volume and improving the return air efficiency, thereby improving the cooling efficiency. Specifically, by arranging the second return air duct on the first side, the second return air duct and the first return air duct are both located on the first side, that is, both are located on the same side of the heat exchanger. By reasonably setting the widths of the two return air ducts, the return air blown toward the front side of the heat exchanger can be evenly distributed, so that the return air and the heat exchanger can exchange heat evenly, achieving uniform cooling, and at the same time, making the defrosting on the heat exchanger more synchronized. Alternatively, by arranging the second return air duct on the second side, the second return air duct and the first return air duct are located on different sides of the heat exchanger, so that the return air of the two return air ducts blows toward different positions of the heat exchanger, especially the return air flowing out of the second return air duct is easily blown toward the back of the heat exchanger, thereby improving the utilization rate of the heat exchanger, allowing the return air flow to fully utilize the heat exchanger for heat exchange, improving the heat exchange efficiency of the return air, and thus improving the cooling efficiency.

[0013] According to some embodiments of the present invention, the air duct assembly includes a first air duct body, which defines the heat exchanger chamber with the rear wall of the gallbladder body, and the second return air duct, the first return air duct and the first supply air duct are integrally formed in the first air duct body.

[0014] According to some embodiments of the present invention, the second return air duct is arranged on the first side, and the second return air duct, the first supply air duct and the first return air duct are arranged in sequence along a first direction, and the first direction is parallel to the width direction of the bladder body.

[0015] According to some embodiments of the present invention, a first return air outlet is provided at one end of the first return air duct away from the second chamber, and a second return air outlet is provided at one end of the second return air duct away from the second chamber. The length of the first return air outlet along the first direction is L1, the length of the second return air outlet along the first direction is L2, and the length of the first air duct body along the first direction is H, satisfying the following: L1 ≥ H / 3, L2 ≥ H / 3, L1 + L2 < H.

[0016] According to some embodiments of the present invention, the width of the first return air duct along the first direction increases gradually from an end of the first return air duct close to the second chamber to an end of the first return air duct far from the second chamber;

[0017] The width of the second return air duct along the first direction increases gradually from an end of the second return air duct close to the second chamber to an end of the second return air duct far from the second chamber.

[0018] According to some embodiments of the present invention, the first air duct body includes a duct front cover, a duct rear cover and a heat insulation member, the duct rear cover is connected to the side of the duct front cover facing the heat exchanger, the heat insulation member is arranged between the duct rear cover and the duct front cover, and the heat insulation member and the duct rear cover enclose the first return air duct and the second return air duct.

[0019] According to some embodiments of the present invention, the second return air duct is arranged on the second side, and the second return air duct, the first supply air duct and the first return air duct are arranged in sequence along a first direction, and the first direction is parallel to the width direction of the bladder body.

[0020] According to some embodiments of the present invention, the first air duct body includes an air duct front cover and an air duct rear cover, wherein the air duct rear cover is connected to a side of the air duct front cover facing the heat exchanger; the air duct rear cover includes:

[0021] a first cover plate, located on the first side of the heat exchanger, the first cover plate and the air duct front cover enclosing the first return air duct and the first supply air duct;

[0022] The second cover plate is located at the second side of the heat exchanger. The second cover plate protrudes from the outer wall surface of the first cover plate. The second cover plate and the air duct front cover are enclosed to form the second return air duct.

[0023] According to some embodiments of the present invention, the refrigeration device includes a functional module;

[0024] The air duct front cover includes a third cover plate and a fourth cover plate connected to the third cover plate, the third cover plate and the air duct rear cover enclose the second return air duct, and the fourth cover plate and the air duct rear cover enclose the first return air duct and the first supply air duct; wherein, the fourth cover plate protrudes from the outer wall surface of the third cover plate to form an installation space for installing the functional module on one side of the outer wall surface of the third cover plate.

[0025] According to some embodiments of the present invention, a first return air outlet is provided at one end of the first return air duct away from the second chamber, the length of the first return air outlet along the first direction is L3, the length of the first air duct body along the first direction is H, and H / 3≤L3≤2H / 3 is satisfied;

[0026] The maximum width of the second return air duct along the first direction is L4, which satisfies 0<L4≤0.3H.

[0027] According to some embodiments of the present invention, among the walls of the first air duct body forming the first return air duct, along the circumference of the first return air duct, except for the wall facing the heat exchanger, at least one wall in the remaining directions is provided with a first heat insulation layer;

[0028] Among the walls of the first air duct body forming the second return air duct, at least one wall is provided with a second heat insulation layer.

[0029] According to some embodiments of the present invention, the refrigeration device includes a foam layer, which is coated on the outer wall of the bladder body, and the second return air duct is located on the second side and is arranged in the foam layer.

[0030] According to some embodiments of the present invention, the refrigeration device further includes a heater, which is disposed in the heat exchanger chamber and is used to heat the heat exchanger;

[0031] A first return air outlet is provided at one end of the first return air duct away from the second chamber, and a second return air outlet is provided at one end of the second return air duct away from the second chamber. Along the second direction, the first return air outlet and the second return air outlet are located on the upper side of the heater, and the second direction is parallel to the height direction of the tank body.

[0032] According to some embodiments of the present invention, there are two second chambers, the first return air duct is connected to one of the second chambers, and the second return air duct is connected to another of the second chambers.

[0033] According to some embodiments of the present invention, a first air passage and a second air passage are provided between the first chamber and the second chamber, the first air passage is connected to the first return air duct, and the second air passage is connected to the second return air duct; wherein,

[0034] The refrigeration device includes a partition, which is installed in the bladder body and divides the bladder body into the first chamber and the second chamber, and the first air passage and the second air passage pass through the partition along the thickness direction of the partition;

[0035] Alternatively, the body includes a first body and a second body, the first body is provided with the first chamber, the second body is provided with the second chamber, a foam layer is provided between the first body and the second body, and the first air passage and the second air passage pass through the foam layer along the thickness direction of the foam layer.

[0036] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0038] Figure 1 A front view of a refrigeration device according to an embodiment of the present invention;

[0039] Figure 2 for Figure 1 A partial cross-sectional view of the refrigeration device shown along section AA;

[0040] Figure 3 for Figure 1 A partial cross-sectional view of the refrigeration device shown along section BB;

[0041] Figure 4 This is a schematic diagram of a first assembly method of a heat exchanger and a body according to an embodiment of the present utility model;

[0042] Figure 5 This is a schematic diagram of a second assembly method of the heat exchanger and the body of the embodiment of the utility model;

[0043] Figure 6 This is a first cross-sectional view of the assembly of the first air duct body and the bladder body of the first embodiment of the present utility model;

[0044] Figure 7 A second cross-sectional view of the assembly of the first air duct body and the bladder body of the first embodiment of the present utility model;

[0045] Figure 8 This is a schematic structural diagram of the first air duct body of the first embodiment of the present utility model at a first viewing angle;

[0046] Figure 9 This is a schematic structural diagram of the first air duct body of the first embodiment of the present utility model at a second viewing angle;

[0047] Figure 10 A cross-sectional view of the first air duct body of the first embodiment of the present utility model;

[0048] Figure 11 A cross-sectional view of the assembly of the first air duct body and the duct body according to the second embodiment of the present invention;

[0049] Figure 12 This is a structural schematic diagram of the first air duct body of the second embodiment of the present utility model at a first viewing angle;

[0050] Figure 13 This is a schematic structural diagram of the first air duct body of the second embodiment of the present utility model at a second viewing angle;

[0051] Figure 14 This is a front view of the first air duct body of the second embodiment of the present utility model;

[0052] Figure 15 for Figure 14 A cross-sectional view of the first air duct body along section CC;

[0053] Figure 16 for Figure 14 A cross-sectional view of the first air duct body along section DD;

[0054] Figure 17 for Figure 14 A cross-sectional view of the first air duct body along section EE;

[0055] Figure 18 This is a rear view of the first air duct body of the second embodiment of the present invention.

[0056] Figure Number:

[0057] Refrigeration equipment 10; body 100; rear wall 101; side wall 102;

[0058] First chamber 110; first storage chamber 111; heat exchanger chamber 112; second chamber 120; second storage chamber 121;

[0059] Partition 200; first air passage 210; second air passage 220; third air passage 230;

[0060] Heat exchanger 300; first side 300a; second side 300b;

[0061] First air duct body 400;

[0062] First air supply duct 400a; first air return duct 400b; second air return duct 400c; third air return duct 400d; first return air inlet 401; second return air inlet 402; first return air outlet 403; second return air outlet 404; first air supply duct 405;

[0063] Air duct front cover 410; third cover plate 411; fourth cover plate 412;

[0064] Air duct rear cover 420; first cover plate 421; second cover plate 422;

[0065] Wind guide plate 430; heat insulation member 440; first heat insulation layer 450; second heat insulation layer 460;

[0066] Second air duct body 500; second air supply duct 510; fan 600; damper 700. DETAILED DESCRIPTION

[0067] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0068] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0069] In the description of this utility model, "a plurality" refers to two or more. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0070] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0071] The present application provides a refrigeration device, which may be an electrical appliance such as a refrigerator or freezer.

[0072] Please refer to Figure 1 , Figure 1 The front view of the refrigeration device of the present invention is shown in FIG. Refrigeration device 10 includes a body 100, a heat exchanger 300 and an air duct assembly.

[0073] The body 100 is provided with a first chamber 110 and a second chamber 120, each of which has different cooling temperatures. In one embodiment, the cooling temperature of the first chamber 110 is lower than that of the second chamber 120. The number of second chambers 120 may be one or more, and each second chamber 120 may have a different cooling temperature. For example, if there is only one first chamber 110 and one second chamber 120, the first chamber 110 functions as a freezer, while the second chamber 120 can function as a temperature-changing chamber or a refrigerator. If there is only one first chamber 110 and two second chambers 120, the first chamber 110 functions as a freezer, while the two second chambers 120 can function as a temperature-changing chamber and a refrigerator, respectively. Alternatively, the two second chambers 120 can function as a freezer and a refrigerator, respectively.

[0074] The first chamber 110 and the second chamber 120 can each be formed by an independent chamber 100, or they can be separated by a single chamber 100. For example, if there is only one chamber 100, an insulating partition can be provided within the chamber 100 to separate the first chamber 110 and the second chamber 120. By supplying different amounts of cooling to the first chamber 110 and the second chamber 120, the first chamber 110 and the second chamber 120 can be kept at different temperatures, thereby meeting the user's storage needs for different items.

[0075] The following description assumes that both the first chamber 110 and the second chamber 120 are configured as one. In one embodiment, the cooling temperature of the first chamber 110 is lower than that of the second chamber 120. The cooling temperature of the first chamber 110 is -24°C to -18°C, and the cooling temperature of the second chamber 120 is -18°C to -5°C. The first chamber 110 serves as a freezer, and the second chamber 120 can be used as a warming chamber.

[0076] Please refer to Figure 2 , Figure 2 for Figure 1 The refrigeration device is shown in a partial cross-sectional view along section AA. The first compartment 110 includes a first storage compartment 111 and a heat exchanger compartment 112 , in which a heat exchanger 300 , such as an evaporator, is disposed.

[0077] The air duct assembly is provided with a first air supply duct 400a and a third air return duct 400d. Both the first air supply duct 400a and the third air return duct 400d are connected to the heat exchanger chamber 112 and the first storage chamber 111. The cold air in the heat exchanger chamber 112 is sent into the first storage chamber 111 through the first air supply duct 400a to realize the cooling of the first storage chamber 111. At the same time, the air in the first storage chamber 111 that has undergone heat exchange with the stored items flows back to the heat exchanger chamber 112 through the third return air duct 400d.

[0078] The refrigeration device 10 also includes a fan 600, which is a power source for providing power to drive air flow. Specifically, during operation, the fan 600 can generate negative pressure, sucking the cold air in the heat exchanger chamber 112 into the first air supply duct 400a. Under the continuous action of the fan 600, the cold air is sent to the first storage chamber 111 through the first air supply duct 400a for heat exchange, thereby reducing the temperature of the first storage chamber 111. The heat-exchanged air flows back to the heat exchanger chamber 112 through the third return air duct 400d, exchanges heat with the heat exchanger 300, and cools down. The cooled cold air is then sent back to the first storage chamber 111 through the first air supply duct 400a by the fan 600. This cycle repeats, thus achieving an air-cooling cycle for the first storage chamber 111.

[0079] Please continue to refer to Figure 2 To cool the second chamber 120 , a third air passage 230 may be provided between the first chamber 110 and the second chamber 120 . The third air passage 230 is connected to the first air supply duct 400 a , so that cold air in the heat exchanger chamber 112 can enter the second chamber 120 through the first air supply duct 400 a and the third air passage 230 .

[0080] Please refer to Figure 3 , Figure 3 for Figure 1 The refrigeration device shown is a partial cross-sectional view along section BB. The air duct assembly further includes a first return air duct 400b, which connects the second chamber 120 and the heat exchanger chamber 112. Air after heat exchange in the second chamber 120 flows into the heat exchanger chamber 112 through the first return air duct 400b. Specifically, a first air passage 210 may be provided between the first chamber 110 and the second chamber 120, communicating with the first return air duct 400b. When cooling the second chamber 120, the cold air in the heat exchanger chamber 112 is sent into the second chamber 120 through the first air supply duct 400a and the third air passage 230 by the wind force of the fan 600, thereby reducing the temperature of the second chamber 120. The air after heat exchange flows back to the heat exchanger chamber 112 through the first air passage 210 and the first return air duct 400b, exchanges heat with the heat exchanger 300 and cools down. The cooled cold air is then sent back into the second chamber 120 by the fan 600. This cycle repeats, thereby achieving an air-cooling cycle for the second chamber 120.

[0081] In the embodiment of the present application, the first air supply duct 400a and the first air return duct 400b are integrally formed and integrated into the same air duct component. By integrating the first air supply duct 400a and the first air return duct 400b, the overall structure of the air duct assembly can be simplified, making the entire air duct design more compact, reducing the internal space occupied by the bladder body 100, and increasing storage space.

[0082] Furthermore, the first air supply duct 400a and the first air return duct 400b are disposed on the same side of the heat exchanger 300. Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the first assembly of the heat exchanger and the body of the utility model embodiment. Figure 5 This is a schematic diagram of a second assembly method for a heat exchanger and a bladder body according to an embodiment of the present invention. The heat exchanger 300 includes a first side 300a and a second side 300b. The side of the heat exchanger 300 facing away from the rear wall 101 of the bladder body 100 is the first side 300a, and the side of the heat exchanger 300 facing the side wall 102 of the bladder body 100 is the second side 300b. For ease of explanation, the side of the heat exchanger 300 facing away from the rear wall 101 of the bladder body 100 is defined as the front side of the heat exchanger 300. Specifically, the first side 300a is the front side of the heat exchanger 300, and the second side 300b is the left or right side of the heat exchanger 300.

[0083] In the embodiment of this application, Figure 2 and Figure 3 As shown, the first supply air duct 400a and the first return air duct 400b are both arranged on the first side 300a of the heat exchanger 300, that is, the first supply air duct 400a and the first return air duct 400b are both located on the front side of the heat exchanger 300, and the first return air duct 400b utilizes the space on the front side of the heat exchanger 300, and the first return air duct 400b and the first supply air duct 400a share the space on the front side of the heat exchanger 300. Compared with the traditional refrigerator which pre-buries the return air duct in the foam layer or arranges the return air duct on the back of the evaporator, there is no need to increase the thickness of the foam layer of the refrigeration device 10, nor is there any need to reserve installation space on the back side of the heat exchanger 300, which can effectively increase the storage space of the refrigeration device 10.

[0084] In the embodiment of the present application, the air duct assembly is further provided with a second return air duct, which also connects the second chamber 120 and the heat exchanger chamber 112. The air in the second chamber 120 can flow back into the heat exchanger chamber 112 through the second return air duct. Specifically, a second air passage can be further provided between the first chamber 110 and the second chamber 120. The second air passage is connected to the second return air duct. During the cooling process of the second chamber 120, the air in the second chamber 120 that has undergone heat exchange can flow back into the heat exchanger chamber 112 through the first air passage 210 and the first return air duct 400b, or can flow back into the heat exchanger chamber 112 through the second air passage and the second return air duct.

[0085] By providing two return air ducts to return air to the second chamber 120 , the return air volume can be increased, the return air efficiency of the second chamber 120 can be improved, and the cooling effect can be improved.

[0086] The second return air duct can be disposed on the first side 300a of the heat exchanger 300, or the second return air duct can also be disposed on the second side 300b. It is understood that when the second return air duct is disposed on the first side 300a, the second return air duct and the first return air duct 400b are located on the same side of the heat exchanger 300. When the second return air duct is disposed on the second side 300b, the second return air duct and the first return air duct 400b are located on different sides of the heat exchanger 300.

[0087] When the second return air duct is located on the first side 300a of the heat exchanger 300, the second return air duct and the first return air duct 400b are both located on the first side 300a, that is, they are both located on the same side of the heat exchanger 300. By properly setting the widths of the two return air ducts, the return air blown toward the front of the heat exchanger 300 can be evenly distributed, so that the return air and the heat exchanger 300 can exchange heat evenly, achieving uniform cooling. At the same time, the defrosting on the heat exchanger 300 can be more synchronized. When the second return air duct is located on the second side 300b of the heat exchanger 300, the second return air duct and the first return air duct 400b are located on different sides of the heat exchanger 300, so that the return air from the two return air ducts is blown toward different positions of the heat exchanger 300. In particular, the return air flowing out of the second return air duct is more likely to be blown toward the back of the heat exchanger 300, thereby improving the utilization rate of the heat exchanger 300, allowing the return air flow to fully utilize the heat exchanger 300 for heat exchange, improving the heat exchange efficiency of the return air, and thus improving the cooling efficiency.

[0088] It should be noted that, as indicated above, the side of the heat exchanger 300 facing the sidewall 102 of the bladder body 100 is the second side 300b. When the second return air duct is disposed on the second side 300b of the heat exchanger 300, the specific configuration of the second return air duct can be determined based on the specific assembly method of the heat exchanger 300 and the bladder body 100. For example, when a gap exists between the second side 300b of the heat exchanger 300 and the sidewall 102 of the bladder body 100, the second return air duct can be disposed within the gap. When the second side 300b of the heat exchanger 300 is in contact with the sidewall 102 of the bladder body 100, the second return air duct can be pre-embedded within the foam layer adjacent to the sidewall 102 of the bladder body 100.

[0089] Please refer to Figures 1 to 3 In one embodiment, the air duct assembly includes a first air duct body 400 disposed in the first compartment 110. A heat exchanger chamber 112 is defined between the first air duct body 400 and the rear wall 101 of the container body 100. A first storage chamber 111 is formed on the side of the first air duct body 400 facing away from the rear wall 101 of the container body 100. The first return air duct 400b and the first supply air duct 400a are integrated into the first air duct body 400.

[0090] In one embodiment, the second return air duct, the first return air duct 400b, and the first supply air duct 400a are integrally formed within the first duct body 400. That is, the two return air ducts and the first supply air duct 400a are integrated into the same duct body. The second return air duct does not utilize a separate duct structure, further simplifying the overall structure of the duct assembly and facilitating the production of the refrigeration device 10. In other words, regardless of whether the second return air duct is located on the first side 300a of the heat exchanger 300 or on the second side 300b of the heat exchanger 300, the second return air duct can be integrated into the first duct body 400. It will be appreciated that the specific structures of the first duct body 400 corresponding to the two locations of the second return air duct are different.

[0091] The first air duct body 400 of the first embodiment is described in detail below.

[0092] Please refer to Figure 6 , Figure 6 This is a first cross-sectional view of the assembly of the first air duct body and the bladder body of the first embodiment of the utility model. Figure 7 This is a second cross-sectional view of the assembly of the first air duct body and the bladder body of the first embodiment of the present invention. In this embodiment, the second return air duct 400c is provided on the first side 300a of the heat exchanger 300, and the second return air duct 400c, the first supply air duct 400a and the first return air duct 400b are arranged in sequence along the first direction, which is parallel to the width direction of the bladder body 100. Figure 6 As shown in , the first direction is the horizontal direction in the figure. Figure 6 As shown, the first return air duct 400b and the second return air duct 400c are respectively located on the left and right sides of the first supply air duct 400a.

[0093] In this embodiment, both the first return air duct 400b and the second return air duct 400c are located in front of the heat exchanger 300, and are located on the left and right sides of the first supply air duct 400a, respectively. Therefore, the return air from the second compartment 120 can flow back to the heat exchanger chamber 112 either through the first return air duct 400b on the right or through the second return air duct 400c on the left. This ensures that the return air flows evenly toward the heat exchanger 300, exchanging heat with the heat exchanger 300 rather than being concentrated on one side of the heat exchanger 300. This improves the utilization of the heat exchanger 300 and the heat exchange efficiency of the return air. Furthermore, since the temperature of the return air is generally higher than that of the heat exchanger 300, the return air can help defrost the heat exchanger 300. This arrangement ensures that the return air flows evenly toward the heat exchanger 300, allowing for more synchronized defrosting across the heat exchanger 300.

[0094] Please combine Figure 7 And refer to Figure 8 and Figure 9 , Figure 8This is a schematic structural diagram of the first air duct body of the first embodiment of the utility model at a first viewing angle. Figure 9 This is a schematic diagram of the structure of the first air duct body of the first embodiment of the present invention, viewed from a second perspective. The first air duct body 400 includes a front duct cover 410, a rear duct cover 420, and a thermal insulator 440. The rear duct cover 420 is connected to the side of the front duct cover 410 facing the heat exchanger 300 and contacts the heat exchanger 300. The thermal insulator 440 is disposed between the rear duct cover 420 and the front duct cover 410. The thermal insulator 440 and the rear duct cover 420 enclose a first return air duct 400b and a second return air duct 400c. Specifically, a first groove body (not marked) and a second groove body (not marked) are provided on the side of the heat insulation member 440 facing the air duct rear cover 420. The heat insulation member 440 is enclosed by the first groove body and the air duct rear cover 420 to form a first return air duct 400b, and the heat insulation member 440 is enclosed by the second groove body and the air duct rear cover 420 to form a second return air duct 400c.

[0095] The air duct front cover 410 is provided with a first air supply port 405 , which is connected to the first air supply duct 400 a , and the cold air in the heat exchanger chamber 112 is sent into the first storage chamber 111 through the first air supply port 405 .

[0096] Because the temperature of the return airflow is higher than that of the first storage chamber 111, the thermal insulator 440 is provided to isolate the first and second return air ducts 400b, 400c from the air duct front cover 410, preventing the return airflow from transferring heat through the air duct front cover 410 to the first storage chamber 111, thereby preventing the return air from affecting the temperature of the first storage chamber 111. Furthermore, when the refrigeration equipment 10 heats and defrosts the heat exchanger 300, the thermal insulator 440 also blocks heat from being transferred to the air duct front cover 410, preventing heat from being transferred to the first storage chamber 111, and reducing the impact of heating and defrosting on the temperature in the first storage chamber 111.

[0097] It should also be pointed out that the duct back cover 420 is close to the heat exchanger 300, and the duct back cover 420 has a lower temperature. In this embodiment, a first return air duct 400b and a second return air duct 400c are formed by digging grooves on the side of the heat insulation member 440 facing the duct back cover 420. The return air flow entering the first return air duct 400b and the second return air duct 400c can directly contact the duct back cover 420. Then, the return air flow first undergoes preliminary heat exchange with the duct back cover 420, and then enters the heat exchanger chamber 112 to exchange heat with the heat exchanger 300, thereby increasing the heat exchange path of the return air flow and effectively improving the heat exchange efficiency.

[0098] The first air duct body 400 further includes an air guide plate 430 , which is connected to one end of the air duct front cover 410 away from the second compartment 120 . The third return air duct 400 d is defined between the air guide plate 430 and the rear wall 101 of the duct body 100 .

[0099] Please refer to Figure 3 、 Figure 7 and Figure 9 A first return air outlet 403 is provided at one end of the first return air duct 400b away from the second chamber 120. The first return air duct 400b is connected to the heat exchanger chamber 112 through the first return air outlet 403. A second return air outlet 404 is provided at one end of the second return air duct 400c away from the second chamber 120. The second return air duct 400c is connected to the heat exchanger chamber 112 through the second return air outlet 404.

[0100] Specifically, the first return air outlet 403 and the second return air outlet 404 are arranged on the air duct rear cover 420. The first return air outlet 403 and the second return air outlet 404 are both located at the end of the air duct rear cover 420 away from the second chamber 120, that is, both are arranged close to the bottom of the first air duct body 400. A first return air inlet 401 and a second return air inlet 402 are provided at one end of the first duct body 400 near the second chamber 120 (i.e., the top of the first duct body 400). The first return air duct 400b is connected to the first air passage 210 via the first return air inlet 401, and the second return air duct 400c is connected to the second air passage 220 via the second return air inlet 402. In this way, the return air from the second chamber 120 enters from the top of the first duct body 400 and flows into the heat exchanger chamber 112 near the bottom of the first duct body 400. The return air has a longer heat exchange path within the first duct body 400, allowing the return air to fully exchange heat and cool with the duct rear cover 420 before entering the heat exchanger chamber 112, which can significantly improve heat exchange efficiency.

[0101] In one embodiment, reference Figure 6 As shown, the width of the first air return duct 400 b along the first direction increases gradually from an end of the first air return duct 400 b close to the second chamber 120 to an end of the first air return duct 400 b far from the second chamber 120 .

[0102] Therefore, the first return air duct 400b has a narrower width at the end near the first return air inlet 401 and a wider width at the end near the first return air outlet 403. For example, taking the second chamber 120 as being located above the first chamber 110, the first return air duct 400b is narrow at the top and wider at the bottom, and its cross-section is generally trumpet-shaped, providing the first return air duct 400b with a larger space, which facilitates the return of air from the second chamber 120. Furthermore, since the first return air outlet 403 is located at the rear end of the first return air duct 400b and is wider at the rear end, the length of the first return air outlet 403 can be increased accordingly based on the width of the rear end of the first return air duct 403, further facilitating the return of air. This allows the return air to flow through the larger first return air outlet 403 to a larger area within the heat exchanger chamber 112, thereby increasing the heat exchange area between the return air and the heat exchanger 300 and improving the heat exchange effect.

[0103] Similarly, the width of the second return air duct 400c along the first direction increases from the end of the second return air duct 400c close to the second chamber 120 to the end away from the second chamber 120. Its function is the same as that of the first return air duct 400b, which will not be described in detail here.

[0104] Please refer to Figure 10 , Figure 10 This is a cross-sectional view of the first air duct body of the first embodiment of the present invention. In one embodiment, the length of the first return air outlet 403 along the first direction is defined as L1, the length of the second return air outlet 404 along the first direction is defined as L2, and the length of the first air duct body 400 along the first direction is defined as H, satisfying the following conditions: L1 ≥ H / 3, L2 ≥ H / 3, and L1 + L2 < H.

[0105] By ensuring that L1 ≥ H / 3 and L2 ≥ H / 3, i.e., along the first direction, the lengths of the first and second return air outlets 403, 404 are at least greater than or equal to one-third of the total length of the first air duct body 400, the first and second return air outlets 403, 404 are designed to be longer than those of conventional air duct structures. This allows the return airflow to flow to a wider area within the heat exchanger chamber 112, rather than just to one side of the heat exchanger chamber 112. This allows the return airflow to utilize a larger area of ​​the heat exchanger 300 for heat exchange, thereby increasing the utilization rate of the heat exchanger 300 and further improving the heat exchange efficiency of the return air. Furthermore, the longer design of the first and second return air outlets 403, 404 reduces the risk of frost blocking the return air outlets and obstructing the return air.

[0106] In one embodiment, the length of the first return air outlet 403 along the first direction is equal to the length of the second return air outlet 404 along the first direction, i.e., L1 = L2. This allows the air volumes discharged from the first return air outlet 403 and the second return air outlet 404 to be approximately equal, ensuring that the air flowing into the heat exchanger chamber 112 comes into uniform contact with the heat exchanger 300, achieving uniform heat exchange and maintaining the same or nearly the same air temperature throughout the heat exchanger chamber 112.

[0107] The first air duct body 400 of the second embodiment is described in detail below.

[0108] Please refer to Figure 11 , Figure 11 This is a cross-sectional view of the assembly of the first air duct body and the duct body of the second embodiment of the present invention. In this embodiment, the second return air duct 400c is disposed on the second side 300b of the heat exchanger 300, i.e., the second return air duct 400c and the first return air duct 400b are located on different sides of the heat exchanger chamber 112. This allows the return air from the two return air ducts to be directed to different locations on the heat exchanger 300. In particular, the return air from the second return air duct 400c is more likely to be directed to the back of the heat exchanger 300, thereby improving the utilization rate of the heat exchanger 300 and enabling the return air flow to fully utilize the heat exchanger 300 for heat exchange, thereby increasing the heat exchange efficiency of the return air and thus enhancing the cooling efficiency.

[0109] In this embodiment, the second return air duct 400c, the first supply air duct 400a, and the first return air duct 400b are arranged sequentially along the width of the duct body 100. That is, the second return air duct 400c and the first return air duct 400b are located on opposite sides of the first supply air duct 400a. By arranging the second return air duct 400c and the first return air duct 400b on opposite sides of the first supply air duct 400a, the return air flows from both sides of the first supply air duct 400a to the heat exchanger 300. This allows the return air to flow to more areas of the heat exchanger 300, rather than being concentrated on one side of the heat exchanger 300 for heat exchange. This increases the effective heat exchange area between the return air and the heat exchanger 300, improves the utilization rate of the heat exchanger 300, and enhances the heat exchange effect of the return air.

[0110] Please combine Figure 11 And refer to Figure 12 and Figure 13 , Figure 12 This is a schematic structural diagram of the first air duct body in the second embodiment of the utility model at a first viewing angle. Figure 13This is a schematic structural diagram of the first air duct body of the second embodiment of the present invention from a second perspective. The first air duct body 400 includes a front air duct cover 410 and a rear air duct cover 420. The rear air duct cover 420 is located on the side of the front air duct cover 410 facing the heat exchanger 300, that is, the rear air duct cover 420 is located between the front air duct cover 410 and the heat exchanger 300. The rear air duct cover 420 includes a first cover plate 421 and a second cover plate 422. The first cover plate 421 is connected to the front air duct cover 410 and, together with the front air duct cover 410, forms a first supply air duct 400a and a first return air duct 400b. The second cover plate 422 is connected to the front air duct cover 410 and, together with the front air duct cover 410, forms a second return air duct 400c.

[0111] In this embodiment, if Figure 12 As shown, the second cover plate 422 protrudes from the outer wall of the first cover plate 421. It will be understood that the outer wall of the first cover plate 421 is the side of the first cover plate 421 facing away from the air duct front cover 410. Specifically, when the first air duct body 400 and the duct body 100 are assembled, the first cover plate 421 is placed against the front side of the heat exchanger 300. Since the second cover plate 422 protrudes from the outer wall of the first cover plate 421, the second cover plate 422 is located on the second side 300b of the heat exchanger 300, thereby positioning the second return air duct 400c on the second side 300b of the heat exchanger 300.

[0112] The first cover plate 421 and the second cover plate 422 can be provided as two independent components, both of which are connected to the air duct front cover 410. Alternatively, the first cover plate 421 and the second cover plate 422 can also be an integral structure, for example, the first cover plate 421 and the second cover plate 422 are integrally formed, so that the air duct rear cover 420 is a whole, and the air duct rear cover 420 is connected to the air duct front cover 410 as a whole.

[0113] Please refer to Figure 13 The air duct front cover 410 includes a third cover plate 411 and a fourth cover plate 412 connected to the third cover plate 411. The third cover plate 411 and the air duct rear cover 420 enclose a second return air duct 400c. The fourth cover plate 412 and the air duct rear cover 420 enclose a first supply air duct 400a and a first return air duct 400b.

[0114] Among them, the fourth cover plate 412 protrudes from the outer wall surface of the third cover plate 411, that is, the surface of the fourth cover plate 412 is not flush with the surface of the third cover plate 411, and the distance between the outer wall surface of the fourth cover plate 412 and the front side surface of the heat exchanger 300 is farther, so that the air duct front cover 410 is roughly stepped, so that an installation space can be formed on one side of the outer wall surface of the third cover plate 411. Taking Figure 13 as an example, an installation space is formed on the left side of the fourth cover plate 412, which can be used to install some components inside the refrigeration equipment 10.

[0115] For example, the refrigeration device 10 includes a functional module that can be installed in the aforementioned installation space. The functional module can include any one of an ice-making module, a sterilization and purification module, and a temperature and humidity module. In one embodiment, the refrigeration device 10 includes an ice-making module that is disposed in the aforementioned installation space and connected to the outer wall surface of the third cover plate 411.

[0116] The first air duct body 400 of this embodiment is based on the fact that the second return air duct 400c is arranged on the second side 300b of the heat exchanger 300. The second return air duct 400c mainly occupies the space on the second side 300b of the heat exchanger 300, so that the part of the air duct front cover 410 corresponding to the second return air duct 400c can be recessed backward, so that an installation space is formed on one side of the outer wall of the third cover plate 411, so that the ice-making module can be installed using the installation space, reducing the occupation of the space in the first storage chamber 111, and can increase the effective storage volume of the first storage chamber 111, thereby improving the problem of insufficient storage space caused by the installation of the ice-making module in the related art.

[0117] Please refer to Figure 14 and Figure 15 , Figure 14 This is a front view of the first air duct body of the second embodiment of the utility model. Figure 15 for Figure 14 A cross-sectional view of the first air duct body along section CC. Among the walls of the first air duct body 400 forming the first return air duct 400b, along the circumference of the first return air duct 400b, except for the wall facing the heat exchanger 300, at least one wall in the remaining directions is provided with a first thermal insulation layer 450. In one embodiment, except for the wall facing the heat exchanger 300, all other walls of the first air duct body 400 forming the first return air duct 400b are provided with the first thermal insulation layer 450.

[0118] By providing the first thermal insulation layer 450, the first thermal insulation layer 450 isolates the first return air duct 400b from the air duct front cover 410, preventing the return air from transferring heat through the air duct front cover 410 to the first storage chamber 111, thereby preventing the return air from affecting the temperature of the first storage chamber 111. Furthermore, when the refrigeration device 10 heats and defrosts the heat exchanger 300, the first thermal insulation layer 450 also blocks heat from being transferred to the air duct front cover 410, preventing heat from being transferred to the first storage chamber 111, and reducing the impact of heating and defrosting on the temperature in the first storage chamber 111.

[0119] It should be understood that the wall of the first return air duct 400b facing the heat exchanger chamber 112 is not provided with an insulation layer, that is, the inner wall of the above-mentioned first cover plate 421 is not provided with a insulation layer. Since the first cover plate 421 is close to the heat exchanger 300, the first cover plate 421 has a lower temperature, so the return air flow entering the first return air duct 400b can directly contact the inner wall of the first cover plate 421, so that the return air flow first exchanges heat with the first cover plate 421, and then enters the heat exchanger chamber 112 to exchange heat with the heat exchanger 300, which increases the heat exchange path of the return air flow and can effectively improve the heat exchange efficiency.

[0120] Please refer to Figure 16 , Figure 16 for Figure 14 In the cross-sectional view of the first air duct body along the cross section DD, the first air duct body 400 forms the wall of the second return air duct 400c, and at least one wall is provided with a second heat insulation layer 460. In one embodiment, please refer to Figure 17 , Figure 17 for Figure 14 A cross-sectional view of the first air duct body along section EE. The walls of the first air duct body 400 forming the first return air duct 400b are all provided with a second thermal insulation layer 460. Similarly, the second thermal insulation layer 460 separates the second return air duct 400c from the air duct front cover 410, preventing the return air flow from transferring heat to the first storage chamber 111 through the air duct front cover 410, thereby preventing the return air from affecting the temperature of the first storage chamber 111. Moreover, when the refrigeration equipment 10 heats and defrosts the heat exchanger 300, the second thermal insulation layer 460 can also block heat from being transferred to the air duct front cover 410, preventing heat from being transferred to the first storage chamber 111, and reducing the impact of heating and defrosting on the temperature in the first storage chamber 111.

[0121] A first return air outlet 403 is provided at one end of the first return air duct 400 b away from the second chamber 120 . The first return air duct 400 b is connected to the heat exchanger chamber 112 via the first return air outlet 403 . A second return air outlet 404 is provided at one end of the second return air duct 400 c away from the second chamber 120 . The second return air duct 400 c is connected to the heat exchanger chamber 112 via the second return air outlet 404 .

[0122] Please refer to Figure 18 , Figure 18 This is a rear view of the first air duct body of the second embodiment of the present invention. In one embodiment, the length of the first return air outlet 403 along the first direction is defined as L3, and the length of the first air duct body 400 along the first direction is defined as H, satisfying H / 3≤L3≤2H / 3.

[0123] By setting L3 ≥ H / 3, the length of the first return air outlet 403 along the first direction is at least greater than or equal to one-third of the total length of the first air duct body 400. Compared to traditional air duct structures, the longer design of the first return air outlet 403 allows the return airflow to flow to a larger area within the heat exchanger chamber 112, rather than just to one side of the heat exchanger chamber 112. This allows the return airflow to utilize a larger area of ​​the heat exchanger 300 for heat exchange, thereby increasing the utilization rate of the heat exchanger 300 and further improving the heat exchange efficiency of the return air. Furthermore, the longer design of the first return air outlet 403 reduces the risk of frost blocking the return air outlet and obstructing the return air.

[0124] This embodiment also ensures that L3 ≤ 2H / 3, i.e., the length of the first return air outlet 403 does not exceed two-thirds of the total length of the first air duct body 400. This prevents the first return air duct 400b from being oversized to accommodate the length of the first return air outlet 403. This prevents the first return air duct 400b from occupying too much space, thereby reducing the volume of the first supply air duct 400a and affecting the air supply efficiency of the first chamber 110.

[0125] In one embodiment, please refer again to Figure 17 , the maximum width of the second return air duct 400c along the first direction is defined as L4, satisfying the following relationship: 0<L4≤0.3H.

[0126] It is understandable that since the second return air duct 400c is disposed on the second side 300b of the heat exchanger 300, i.e., on the left or right side of the heat exchanger 300, if the width of the second return air duct 400c along the first direction is designed to be too large, thus occupying a large amount of space, the heat exchanger 300 cannot be made very wide, and the heat exchange area between the return air flow and the heat exchanger 300 is small, thus affecting the cooling efficiency. In this embodiment, by setting L4 ≤ 0.3H, i.e., the maximum width of the second return air duct 400c along the first direction does not exceed 0.3 times the total width of the first air duct body 400, more space can be reserved for installing the heat exchanger 300, so that the heat exchanger 300 can be configured with a sufficiently large width, providing a sufficiently large heat exchange area for the return air to exchange heat, improving the heat exchange efficiency, and ensuring the cooling effect of the refrigeration equipment 10.

[0127] In one embodiment, the width of the second return air duct 400c along the first direction is always the same. Figure 16 and Figure 17 As shown, the air cavity of the second return air duct 400c can be designed as a standard rectangular parallelepiped, so as to leave a regular space on one side of the second return air duct 400c to install the heat exchanger 300, so that the heat exchanger 300 can make full use of this part of the space and avoid space waste.

[0128] The second embodiment described above provides a solution in which the second return air duct 400c is located on the second side 300b and is integrated with the first return air duct 400b. However, this is not limiting. In other optional embodiments of the present application, the second return air duct 400c may not be integrated with the first return air duct 400b, that is, the second return air duct 400c may be an independent air duct structure. For example, in one embodiment, the second return air duct 400c is located on the second side 300b of the heat exchanger 300 and is disposed within the foam layer of the refrigerator.

[0129] The refrigeration device 10 further includes a heater (not shown in the figure), which is disposed in the heat exchanger chamber 112. The heat generated by the heater can melt the frost condensed on the heat exchanger 300. The heater can be configured to generate heat when powered on.

[0130] It can be understood that when the heater heats the heat exchanger 300, the heat generated by the heater can also be transferred to the air duct rear cover 420, so that the heat is transferred to the first return air duct 400b and the second return air duct 400c through the air duct rear cover 420, thereby also having a certain defrosting effect on the first return air duct 400b and the second return air duct 400c.

[0131] To improve the defrosting efficiency of the first and second return air ducts 400b, 400c, in one embodiment, the first and second return air outlets 403, 404 are located above the heater along the height of the refrigeration unit 10. That is, the first and second return air outlets 403, 404 are located higher than the heater. Consequently, when the heater generates heat, hot air is generated within the heat exchanger chamber 112. This hot air rises. Because the first and second return air outlets 403, 404 are located above the heater, the hot air can enter the first and second return air ducts 400b, 400c, respectively, through the first and second return air outlets 403, 404. This transfers heat into the first and second return air ducts 400b, 400c, thereby improving the defrosting efficiency of both return air ducts. As will be readily understood, the height configuration of the first and second return air outlets 403, 404 in this embodiment is applicable to both the first and second duct bodies 400 of the first and second embodiments described above.

[0132] In one embodiment, if Figure 1As shown, there is one bladder body 100, and a partition 200 is disposed within the bladder body 100. The partition 200 separates the bladder body 100 into a first chamber 110 and a second chamber 120. It is understood that an insulation layer may be disposed within the partition 200 to provide thermal insulation, thereby blocking heat transfer between the first chamber 110 and the second chamber 120 and preventing the temperatures of the first chamber 110 and the second chamber 120 from affecting each other. The partition 200 may extend along the width of the bladder body 100 (in which case the first chamber 110 and the second chamber 120 are located above and below the partition 200) or along the height of the bladder body 100 (in which case the first chamber 110 and the second chamber 120 are located to the left and right of the partition 200). The drawings of the embodiments of this application illustrate the former as an example and are not to be construed as limiting the present application.

[0133] Combine Figure 2 、 Figure 3 、 Figure 7 and Figure 11 As shown, the partition 200 is provided with the aforementioned first air passage 210, second air passage 220, and third air passage 230, all of which penetrate the partition 200 along its thickness. Specifically, a second air duct body 500 may be provided within the second compartment 120. The second air duct body 500 is provided with a second air supply duct 510 and a second air supply port. The second air supply duct 510 communicates with the third air passage 230. When cooling the second compartment 120, cold air within the heat exchanger chamber 112 is delivered into the second air supply duct 510 through the third air passage 230 of the partition 200, and then into the second compartment 120 via the second air supply port for heat exchange. After heat exchange, the return air flows through the first air passage 210 and the second air passage 220 of the partition 200, respectively, into the first return air duct 400b and the second return air duct 400c, and then flows back into the heat exchanger chamber 112.

[0134] The refrigeration device 10 may further include a damper 700 movably mounted on the third air passage 230. The damper 700 is configured to open or block the third air passage 230. When the refrigeration device 10 is cooling only the first chamber 110, the damper 700 blocks the third air passage 230. When the refrigeration device 10 is cooling both the first chamber 110 and the second chamber 120, the damper 700 opens the third air passage 230.

[0135] Of course, in other optional embodiments of the present application, the first chamber 110 and the second chamber 120 may be separated by a foam layer, and the first air passage 210, the second air passage 220, and the third air passage 230 may also be pre-embedded in the foam layer. In one embodiment, the body 100 includes a first body and a second body, the first body having the first chamber 110, the second body having the second chamber 120, a foam layer disposed between the first and second bodies, and the first air passage 210, the second air passage 220, and the third air passage 230 all penetrate the foam layer along its thickness.

[0136] The above description specifically describes a refrigeration device 10 having one second compartment 120, but the present invention is not limited to this type of refrigeration device 10. It should be understood that the first air duct body 400 of the first and second embodiments described above can also be applied to a refrigeration device 10 having two second compartments 120. In one embodiment, there are two second compartments 120, the first return air duct 400b communicates with one of the second compartments 120, and the second return air duct 400c communicates with the other second compartment 120. In other words, the refrigeration device 10 returns air to the two second compartments 120 via the first return air duct 400b and the second return air duct 400c, respectively.

[0137] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Refrigeration equipment, characterized in that include: The body is provided with a first chamber and a second chamber, wherein the first chamber includes a first storage chamber and a heat exchanger chamber; a heat exchanger disposed in the heat exchanger chamber, the heat exchanger having a first side and a second side, the first side facing away from the rear wall of the bladder body, and the second side and the first side being located on adjacent sides of the heat exchanger; The air duct assembly is provided with a first air supply duct, a first return air duct and a second return air duct, the first air supply duct is connected to the first storage chamber and the heat exchanger chamber, the first return air duct and the second return air duct are both connected to the second chamber and the heat exchanger chamber, the first return air duct and the first air supply duct are both arranged on the first side and are integrally formed, and the second return air duct is arranged on the first side or the second side.

2. The refrigeration equipment according to claim 1, characterized in that The air duct assembly includes a first air duct body, the first air duct body and the rear wall of the duct body define the heat exchanger chamber, and the second return air duct, the first return air duct and the first supply air duct are integrally formed in the first air duct body.

3. The refrigeration equipment according to claim 2, characterized in that The second return air duct is arranged on the first side, and the second return air duct, the first supply air duct and the first return air duct are arranged in sequence along a first direction, and the first direction is parallel to the width direction of the duct body.

4. The refrigeration equipment according to claim 3, characterized in that A first return air outlet is provided at one end of the first return air duct away from the second chamber, and a second return air outlet is provided at one end of the second return air duct away from the second chamber. The length of the first return air outlet along the first direction is L1, the length of the second return air outlet along the first direction is L2, and the length of the first air duct body along the first direction is H, satisfying the following: L1 ≥ H / 3, L2 ≥ H / 3, and L1 + L2 < H.

5. The refrigeration equipment according to claim 3, characterized in that: The width of the first return air duct along the first direction increases gradually from an end of the first return air duct close to the second chamber to an end of the first return air duct far from the second chamber; The width of the second return air duct along the first direction increases gradually from an end of the second return air duct close to the second chamber to an end of the second return air duct far from the second chamber.

6. The refrigeration equipment according to claim 3, characterized in that The first air duct body includes an air duct front cover, an air duct rear cover and a heat insulation member. The air duct rear cover is connected to the side of the air duct front cover facing the heat exchanger. The heat insulation member is arranged between the air duct rear cover and the air duct front cover. The heat insulation member and the air duct rear cover enclose the first return air duct and the second return air duct.

7. The refrigeration equipment according to claim 2, characterized in that The second return air duct is arranged on the second side, and the second return air duct, the first supply air duct and the first return air duct are arranged in sequence along a first direction, and the first direction is parallel to the width direction of the duct body.

8. The refrigeration equipment according to claim 7, characterized in that The first air duct body includes an air duct front cover and an air duct rear cover, wherein the air duct rear cover is connected to a side of the air duct front cover facing the heat exchanger; the air duct rear cover includes: a first cover plate, located on the first side of the heat exchanger, the first cover plate and the air duct front cover enclosing the first return air duct and the first supply air duct; The second cover plate is located at the second side of the heat exchanger. The second cover plate protrudes from the outer wall surface of the first cover plate. The second cover plate and the air duct front cover are enclosed to form the second return air duct.

9. The refrigeration equipment according to claim 8, characterized in that The refrigeration equipment includes a functional module; The air duct front cover includes a third cover plate and a fourth cover plate connected to the third cover plate, the third cover plate and the air duct rear cover enclose the second return air duct, and the fourth cover plate and the air duct rear cover enclose the first return air duct and the first supply air duct; wherein, the fourth cover plate protrudes from the outer wall surface of the third cover plate to form an installation space for installing the functional module on one side of the outer wall surface of the third cover plate.

10. The refrigeration equipment according to claim 7, characterized in that A first return air outlet is provided at one end of the first return air duct away from the second chamber. The length of the first return air outlet along the first direction is L3. The length of the first air duct body along the first direction is H, satisfying H / 3≤L3≤2H / 3. The maximum width of the second return air duct along the first direction is L4, which satisfies 0<L4≤0.3H.

11. The refrigeration equipment according to claim 7, characterized in that The first air duct body forms a wall of the first return air duct, and along the circumference of the first return air duct, except for the wall facing the heat exchanger, at least one wall in the remaining directions is provided with a first heat insulation layer; Among the walls of the first air duct body forming the second return air duct, at least one wall is provided with a second heat insulation layer.

12. The refrigeration equipment according to claim 1, characterized in that The refrigeration device includes a foam layer, which is coated on the outer wall of the bladder body. The second return air duct is located on the second side and is arranged in the foam layer.

13. The refrigeration equipment according to any one of claims 1 to 12, characterized in that: The refrigeration equipment further includes a heater, which is arranged in the heat exchanger chamber and is used to heat the heat exchanger; A first return air outlet is provided at one end of the first return air duct away from the second chamber, and a second return air outlet is provided at one end of the second return air duct away from the second chamber. Along the second direction, the first return air outlet and the second return air outlet are located on the upper side of the heater, and the second direction is parallel to the height direction of the tank body.

14. The refrigeration equipment according to any one of claims 1 to 12, characterized in that: There are two second chambers, the first return air duct is communicated with one of the second chambers, and the second return air duct is communicated with another of the second chambers.

15. The refrigeration equipment according to any one of claims 1 to 11, characterized in that: A first air passage and a second air passage are provided between the first chamber and the second chamber, the first air passage is connected to the first return air duct, and the second air passage is connected to the second return air duct; wherein, The refrigeration device includes a partition, which is installed in the bladder body and divides the bladder body into the first chamber and the second chamber, and the first air passage and the second air passage pass through the partition along the thickness direction of the partition; Alternatively, the body includes a first body and a second body, the first body is provided with the first chamber, the second body is provided with the second chamber, a foam layer is provided between the first body and the second body, and the first air passage and the second air passage pass through the foam layer along the thickness direction of the foam layer.

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