Refrigerator

Abstract

The utility model provides a refrigerator, belongs to the technical field of refrigeration equipment, and aims to solve the technical problem that an air duct assembly in a related refrigerator is large in size in the depth direction of the refrigerator. The refrigerator comprises a first refrigerator container, a second refrigerator container and an air duct assembly. The air duct assembly comprises a front cover plate and a rear cover plate; an air supply cavity is enclosed between the front cover plate and the rear cover plate, a second air return cavity and a third air return cavity are also enclosed between the front cover plate and the rear cover plate, the second air return cavity is located in at least one end of the air supply cavity in the width direction of the second refrigerator container, and invalid air supply areas at the two ends of the rear cover plate in the width direction are utilized; the third air return cavity is located at the end, away from the first refrigerator container, of the air supply cavity, the invalid air supply area of the end, away from the first refrigerator container, of the rear cover plate is utilized, the air duct assembly can supply and return air to the first chamber and the second chamber, and under the condition that the overall size of the air duct assembly is not increased, the air supply efficiency is improved. The utilization rate of the space between the front cover plate and the rear cover plate is increased, and the size of the air duct assembly in the depth direction of the refrigerator is reduced.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of refrigeration equipment, and particularly relate to a refrigerator. BACKGROUND

[0002] The refrigerator generally comprises a refrigeration tank, a freezing tank, an air duct assembly and an evaporator. The refrigeration tank is formed with a refrigeration compartment. The air duct assembly is arranged in the freezing tank, and a space in the freezing tank located at the front side of the air duct assembly forms a freezing compartment. The refrigeration compartment and the freezing compartment are respectively communicated with a chamber where the evaporator is located through different air ducts of the air duct assembly, so that the evaporator can simultaneously refrigerate the refrigeration compartment and the freezing compartment.

[0003] In the related art, the air duct for communicating with the refrigeration compartment and the air duct for communicating with the freezing compartment of the air duct assembly are arranged in front of and behind each other along the depth direction of the freezing tank, which results in that the size of the air duct assembly along the depth direction of the freezing tank is too large. In the case that the size of the freezing tank is unchanged, the available depth of the freezing compartment is reduced, which further results in that the capacity of the freezing compartment is reduced. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a refrigerator, which can solve the technical problem that the size of the air duct assembly along the depth direction of the refrigerator is large.

[0005] Embodiments of the present application provide a refrigerator, which comprises:

[0006] a first tank formed with a first compartment;

[0007] a second tank arranged at one end of the first tank along the height direction of the first tank;

[0008] an air duct assembly arranged in the second tank and separating the inner cavity of the second tank into a second compartment and a heat exchange chamber, the second compartment being located at the front side of the air duct assembly, and the heat exchange chamber being located at the rear side of the air duct assembly; the air duct assembly comprises:

[0009] a front cover plate located at the rear side of the second compartment;

[0010] a rear cover plate arranged at the side of the front cover plate away from the second compartment and surrounding the front cover plate to form a supply air cavity, the supply air cavity being communicated with the heat exchange chamber, the first compartment and the second compartment; the edge of the supply air cavity is arranged in a spaced manner with the edge of the rear cover plate along the width direction of the second tank;

[0011] wherein the rear cover plate and the front cover plate further surround the second return air cavity and the third return air cavity which are communicated with each other;

[0012] the second return air cavity is located at at least one end of the supply air cavity along the width direction of the second tank, and the second return air cavity is used for communicating the first compartment and the third return air cavity;

[0013] A third return air cavity is located at an end of the air supply cavity away from the first tank, and the third return air cavity is in communication with the heat exchange bin.

[0014] The refrigerator of the embodiments of the present application not only has the air supply cavity between the front cover plate and the rear cover plate for supplying cold air to the first chamber and the second chamber, but also has the second return air cavity and the third return air cavity for returning air in the first chamber to the heat exchange bin, thereby achieving the function of returning air to the first chamber. The second return air cavity is located at at least one end of the air supply cavity along the width direction of the second tank, and the useless air supply area at both ends of the rear cover plate in the width direction is utilized. The third return air cavity is located at an end of the air supply cavity away from the first tank, and the useless air supply area at the end of the rear cover plate away from the first tank is utilized. In this way, the air duct assembly can not only supply air to the first chamber and the second chamber and return air to the first chamber, but also can improve the utilization of the space between the front cover plate and the rear cover plate without increasing the overall size of the air duct assembly, thereby reducing the size of the air duct assembly in the depth direction of the refrigerator.

[0015] In some embodiments of the present application, the rear cover plate is configured with a second return air opening for communicating the second return air cavity and the first chamber.

[0016] In this way, the second return air opening is used to communicate the second return air cavity and the first chamber, so that the air in the first chamber can flow to the second return air cavity through the second return air opening.

[0017] In some embodiments of the present application, the side of the rear cover plate facing the front cover plate is configured with a wind collecting cavity, which is recessed in the direction away from the front cover plate.

[0018] The wind collecting cavity is in communication with the second return air opening and the second return air cavity, respectively.

[0019] In this way, the air in the first chamber flows to the wind collecting cavity through the second return air opening, and then flows to the second return air cavity from the wind collecting cavity. The wind collecting cavity can be part of the second return air cavity, and the wind collecting cavity can increase the volume of the second return air cavity, thereby improving the return air effect of the first chamber.

[0020] In some embodiments of the present application, the second return air opening is located at an end of the second return air cavity close to the first tank.

[0021] The end of the rear cover plate away from the first tank is configured to form a notch portion, and the notch portion and the side wall of the second tank away from the first tank form a seventh return air opening, and the seventh return air opening is in communication with the third return air cavity and the heat exchange bin, respectively.

[0022] In this way, along the height direction of the second tank, the second return air outlet is close to the first tank, and the seventh return air outlet is far from the first tank, so that the distance between the second return air outlet and the seventh return air outlet is increased, thereby increasing the capacity of the second return air cavity and the third return air cavity, and increasing the return air effect of the second return air cavity and the third return air cavity on the air from the first chamber.

[0023] In some embodiments of the present application, the size of the air collecting cavity along the depth direction of the second tank decreases from the end close to the first tank to the end far from the first tank.

[0024] In this way, the cavity wall of the air collecting cavity can guide the air that continues to flow forward, reducing the air retention in the air collecting cavity.

[0025] In some embodiments of the present application, the back cover plate is configured with a first air supply outlet for communicating the heat exchange compartment and the air supply cavity.

[0026] The front cover plate is configured with a second air supply outlet for communicating the air supply cavity and the second chamber.

[0027] In this way, the first air supply outlet is used to communicate the heat exchange compartment and the air supply cavity, so that the air in the heat exchange compartment can flow to the air supply cavity through the first air supply outlet. The second air supply outlet is used to communicate the air supply cavity and the second chamber, so that the air in the air supply cavity can flow to the second chamber through the second air supply outlet. The cold air in the heat exchange compartment flows to the air supply cavity through the first air supply outlet, and flows to the second chamber from the second air supply outlet, so as to transport the cold air in the heat exchange compartment to the second chamber, thereby refrigerating the second chamber.

[0028] In some embodiments of the present application, the air duct assembly further comprises a fan, and the fan is arranged in the air supply cavity and connected to the front cover plate or the back cover plate.

[0029] In this way, the fan is used to make the air in the heat exchange compartment flow to the air supply cavity, and supply air to the first chamber and the second chamber through the air supply cavity. In addition, when the fan is working, a relatively low pressure area is formed in the heat exchange compartment, and the air pressure in the heat exchange compartment is lower than that in the third return air cavity and the second chamber. The air pressure difference between the third return air cavity and the heat exchange compartment makes the air in the third return air cavity flow to the heat exchange compartment, the air pressure difference between the third return air cavity and the second return air cavity makes the air in the second return air cavity flow to the third return air cavity, and the air pressure difference between the second return air cavity and the first chamber makes the air in the first chamber flow to the second return air cavity, so as to make the air in the first chamber return to the heat exchange compartment. The air pressure difference between the second chamber and the heat exchange compartment makes the air in the second chamber flow to the heat exchange compartment. In this way, the fan can improve the stability of the air flow direction between the first chamber and the heat exchange compartment in the process of air supply and return, and the stability of the air flow direction between the second chamber and the heat exchange compartment in the process of air supply and return.

[0030] In some embodiments of the present application, the fourth return air opening is configured at one end of the front cover plate away from the first tank, and the fourth return air opening is used to communicate the second chamber and the heat exchange chamber.

[0031] In this way, the fourth return air opening is used to communicate the second chamber and the heat exchange chamber, so that the air in the second chamber can flow to the heat exchange chamber through the fourth return air opening.

[0032] In some embodiments of the present application, the first tank is configured with a fifth return air opening, and the fifth return air opening is in communication with the first chamber.

[0033] The second tank is configured with a sixth return air opening, and the sixth return air opening is in communication with the second return air cavity.

[0034] The refrigerator further comprises a first communication member having a first communication cavity, and the first communication member is connected to the first tank and the second tank respectively, and the first communication cavity communicates the fifth return air opening and the sixth return air opening.

[0035] In this way, the first communication member communicates the first chamber and the second return air cavity, so that the air in the first chamber can flow to the second return air cavity.

[0036] In some embodiments of the present application, the first tank is further configured with a third supply air opening, and the third supply air opening is in communication with the first chamber.

[0037] The second tank is further configured with a fourth supply air opening, and the fourth supply air opening is in communication with the supply air cavity.

[0038] The refrigerator further comprises a second communication member having a second communication cavity, and the second communication member is connected to the first tank and the second tank respectively, and the second communication cavity communicates the third supply air opening and the fourth supply air opening.

[0039] In this way, the second communication member communicates the first chamber and the supply air cavity, so that the cold air in the supply air cavity can flow to the first chamber to cool the first chamber.

[0040] In some embodiments of the present application, the second communication member and the first communication member are integrally arranged.

[0041] In this way, the number of components in the refrigerator is reduced, and the assembly efficiency of the refrigerator is improved. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings needed to be used in the embodiment or related art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0043] Figure 1 It is a structural schematic diagram of the refrigerator of the embodiments of the present application.

[0044] Figure 2 is Figure 1 a sectional view in the direction of arrows A-A;

[0045] Figure 3 is Figure 2 an enlarged schematic view at P1 in the middle;

[0046] Figure 4 is Figure 1 a sectional view in the direction of arrows B-B;

[0047] Figure 5 is Figure 4 an enlarged schematic view at P2 in the middle;

[0048] Figure 6 is an exploded view of a first air duct assembly in a refrigerator according to an embodiment of the present application;

[0049] Figure 7 is an exploded view of a second tank and the first air duct assembly according to an embodiment of the present application;

[0050] Figure 8 is a schematic view of a refrigerator according to an embodiment of the present application at the rear side of the first tank and the second tank;

[0051] Figure 9 is an exploded view of the first tank, the second tank and the first communication member in a refrigerator according to an embodiment of the present application;

[0052] Figure 10 is an exploded view of the second tank and the first communication member in a refrigerator according to an embodiment of the present application;

[0053] Figure 11 is a rear view of the first air duct assembly in a refrigerator according to an embodiment of the present application;

[0054] Figure 12 is Figure 11 a sectional view in the direction of arrows C-C;

[0055] Figure 13 is Figure 11 a sectional view in the direction of arrows D-D;

[0056] Figure 14 is a rear view of the second air duct assembly in a refrigerator according to an embodiment of the present application;

[0057] Figure 15 is Figure 14 an exploded view of the air duct assembly Figure 1 ;

[0058] Figure 16 is Figure 14 an exploded view of the air duct assembly Figure 2 ;

[0059] Figure 17 Rear view of a third air duct assembly in a refrigerator according to an embodiment of the present application;

[0060] Figure 18 Rear view of a third air duct assembly in a refrigerator according to an embodiment of the present application; Figure 17 Exploded view of the third air duct assembly; Figure 1 ;

[0061] Figure 19 Rear view of a third air duct assembly in a refrigerator according to an embodiment of the present application; Figure 17 Exploded view of the third air duct assembly; Figure 2 ;

[0062] Figure 20 Rear view of a fourth air duct assembly in a refrigerator according to an embodiment of the present application;

[0063] Figure 21 Rear view of a fourth air duct assembly in a refrigerator according to an embodiment of the present application; Figure 20 Exploded view of the fourth air duct assembly; Figure 1 ;

[0064] Figure 22 Rear view of a fourth air duct assembly in a refrigerator according to an embodiment of the present application; Figure 20 Exploded view of the fourth air duct assembly; Figure 2 ;

[0065] Figure 23 Rear view of a fourth air duct assembly in a refrigerator according to an embodiment of the present application; Figure 20 Cross-sectional view in the E-E direction;

[0066] Figure 24 Rear view of a fifth air duct assembly in a refrigerator according to an embodiment of the present application;

[0067] Figure 25 Rear view of a fifth air duct assembly in a refrigerator according to an embodiment of the present application; Figure 24 Exploded view of the fifth air duct assembly; Figure 1 ;

[0068] Figure 26 Rear view of a fifth air duct assembly in a refrigerator according to an embodiment of the present application; Figure 24 Exploded view of the fifth air duct assembly; Figure 2 ;

[0069] Figure 27 Rear view of a fifth air duct assembly in a refrigerator according to an embodiment of the present application; Figure 24 Cross-sectional view in the F-F direction;

[0070] Figure 28 Rear view of a sixth air duct assembly in a refrigerator according to an embodiment of the present application;

[0071] Figure 29 Rear view of a sixth air duct assembly in a refrigerator according to an embodiment of the present application; Figure 28 Exploded view of the sixth air duct assembly; Figure 1 ;

[0072] Figure 30 Rear view of a sixth air duct assembly in a refrigerator according to an embodiment of the present application; Figure 28 Exploded view of the sixth air duct assembly; Figure 2 ;

[0073] Figure 31For Figure 28 Cross-sectional view of the middle G-G direction.

[0074] Reference signs:

[0075] 10 - box body;

[0076] 110 - first tank;

[0077] 111 - first chamber; 112 - first return air inlet;

[0078] 113 - third air supply inlet; 114 - first loading and unloading opening;

[0079] 120 - second tank;

[0080] 121 - second chamber; 122 - heat exchange compartment;

[0081] 123 - sixth return air inlet; 124 - fourth air supply inlet;

[0082] 125 - second loading and unloading opening;

[0083] 130 - box shell;

[0084] 20 - air duct assembly;

[0085] 210 - front cover plate;

[0086] 211 - second air supply inlet; 212 - fourth return air inlet;

[0087] 220 - rear cover plate;

[0088] 221 - recess; 222 - third return air inlet;

[0089] 223 - partition side wall; 224 - first return air inlet;

[0090] 225 - second return air inlet; 226 - first air supply inlet;

[0091] 227 - frame portion; 228 - plate body portion;

[0092] 229 - partition portion; 2210 - notch portion;

[0093] 2211 - fifth air supply inlet;

[0094] 230 - return air cover plate;

[0095] 201 - air supply cavity; 202 - first return air cavity;

[0096] 203 - second return air cavity; 204 - third return air cavity;

[0097] 205 - air collecting cavity; 231 - seventh return air inlet;

[0098] 240 - fan;

[0099] 30 - first communication member;

[0100] 301 - first communication cavity;

[0101] 40 - second communication member;

[0102] 401 - second communication cavity. DETAILED DESCRIPTION

[0103] In order to make the purposes, embodiments and advantages of the present application clearer, the following will be a clear and complete description of the exemplary embodiments of the present application in conjunction with the accompanying drawings of the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0104] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the subsequently described embodiments, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0105] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not have to be limited to the clearly listed components, but can include other components not clearly listed or inherent to these products or devices.

[0106] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0107] The terms "first", "second", "third" and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0108] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0109] For the refrigerator in the related art, there is a technical problem that the size of the air duct assembly in the depth direction of the refrigerator is too large. The refrigerator provided in the embodiments of the present application is configured with a recess on the side of the rear cover plate of the air duct assembly away from the front cover plate, the recess is recessed towards the front cover plate, the return air cover plate is arranged on the side of the rear cover plate away from the front cover plate, the return air cover plate is arranged in the recess, and the first return air cavity is formed by the return air cover plate and the recess. The first return air cavity communicates the first compartment and the heat exchange bin. The first return air cavity occupies part of the gap between the front cover plate and the rear cover plate in the depth direction of the refrigerator, so that the air duct assembly can realize the function of returning air to the first compartment without increasing the size in the depth direction, and the size of the air duct assembly in the depth direction of the refrigerator is reduced.

[0110] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0111] It should be noted that the "front side" in the embodiments of the present application refers to the side of the refrigerator facing the user during normal use. The "rear side" refers to the side opposite to the front side, i.e. the side of the refrigerator facing away from the user during normal use.

[0112] Reference Figure 1 The refrigerator in the embodiments of the present application can include a cabinet 10 having a refrigeration compartment, a door connected to the cabinet 10 to open and close the refrigeration compartment, and a refrigeration system for providing cold air to the refrigeration compartment.

[0113] In some possible implementation manners of the present application, the cabinet 10 can include cabinet inner containers (110, 120), and the cabinet inner containers (110, 120) can be formed with refrigeration compartments (111, 121) for containing food or other articles.

[0114] The number of the cabinet inner containers (110, 120) can be two or more. For example, with reference to Figure 1 The number of the cabinet inner containers (110, 120) can be two.

[0115] The box liner can include a first box liner 110, which can be formed with a first compartment 111. A front side of the first compartment 111 can be formed with a first access opening 114, via which a user can take an article from or place an article into the first compartment 111.

[0116] The box liner can further include a second box liner 120, which can be formed with a second compartment 121. A front side of the second compartment 121 can be formed with a second access opening 125, via which a user can take an article from or place an article into the second compartment 121.

[0117] The second box liner 120 can be disposed at one end of the first box liner 110 along a height direction Z of the first box liner 110. With reference to Figure 1 , the second box liner 120 can be disposed below the first box liner 110. It can be understood that, in another possible implementation manner of the embodiments of the present application, the second box liner 120 can also be disposed above the first box liner 110.

[0118] In some possible implementation manners of the embodiments of the present application, the first compartment 111 can be set as one of a refrigeration compartment, a freezing compartment, or a variable-temperature compartment, and the second compartment 121 can also be set as one of a refrigeration compartment, a freezing compartment, or a variable-temperature compartment. For example, the first compartment 111 can be set as a refrigeration compartment, and the second compartment 121 can be set as a freezing compartment.

[0119] In some possible implementation manners of the embodiments of the present application, with reference to Figure 1 The box body 10 can further include a box shell 130 connected to an outer side of the box liner (110, 120) to form an appearance of the box body 10.

[0120] In some possible implementation manners of the embodiments of the present application, a refrigeration system can be disposed in the box body 10. The refrigeration system can be a refrigeration system in the related art. The refrigeration system is used to provide cold air to a refrigeration compartment to reduce the temperature in the refrigeration compartment.

[0121] The refrigeration system can include a compressor, a condenser, a throttling element, and an evaporator, which can be sequentially connected by a pipeline in which a refrigerant can flow. The throttling element can be a capillary tube or an electronic expansion valve.

[0122] When the refrigerator is working, the refrigerant circulates and flows in the compressor, the condenser, the throttling element, and the evaporator. When flowing through the evaporator, the refrigerant absorbs heat and reduces the temperature of the evaporator and the air around the evaporator.

[0123] In some possible implementation manners of the embodiments of the present application, referring to Figure 2 The refrigerator can further include an air duct assembly 20, which can be arranged in the second tank 120. The air duct assembly 20 divides the inner cavity of the second tank 120 into a second compartment 121 and a heat exchange chamber 122. The second compartment 121 is located at the front side of the air duct assembly 20, and the heat exchange chamber 122 is located at the rear side of the air duct assembly 20. Figure 2 The positive direction of the depth direction Y of the second tank 120 is forward, and the negative direction of the depth direction Y is rearward.

[0124] An evaporator (not shown in the drawings) of a refrigeration system can be arranged in the heat exchange chamber 122. The evaporator can be fixedly arranged on the rear wall of the second tank 120.

[0125] The air duct assembly 20 is used to connect the first compartment 111 and the heat exchange chamber 122, and the second compartment 121 and the heat exchange chamber 122, so as to cool the first compartment 111 and the second compartment 121 through the evaporator.

[0126] The return air path between the first compartment 111 and the heat exchange chamber 122 can be: the first compartment 111→the air duct assembly 20→the heat exchange chamber 122.

[0127] The supply air path between the heat exchange chamber 122 and the first compartment 111 can be: the heat exchange chamber 122→the air duct assembly 20→the first compartment 111.

[0128] The return air path between the second compartment 121 and the heat exchange chamber 122 can be: the second compartment 121→the air duct assembly 20→the heat exchange chamber 122.

[0129] The supply air path between the heat exchange chamber 122 and the second compartment 121 can be: the heat exchange chamber 122→the air duct assembly 20→the second compartment 121.

[0130] It should be noted that in the description of the present application, “communication” can be direct communication or indirect communication through a cavity, a channel, a port, etc.

[0131] The following embodiments take the second tank 120 arranged below the first tank 110 as an example to describe the air duct assembly 20.

[0132] In some possible implementation manners of the embodiments of the present application, the air duct assembly 20 can communicate the second compartment 121 and the heat exchange chamber 122 to cool the second compartment 121.

[0133] Specifically, referring to Figure 3 The air duct assembly 20 can include a front cover plate 210. The front cover plate 210 can be connected to the second tank 120.

[0134] In some embodiments, the front cover plate 210 and the second tank 120 can be connected by fasteners (screws or fixing pins, etc.).

[0135] In some embodiments, the front cover plate 210 and the second tank 120 can be connected by fasteners (screws or fixing pins, etc.).

[0136] The front cover plate 210 is located at the rear side of the second chamber 121, or in other words, the front cover plate 210 forms the rear wall of the second chamber 121.

[0137] In some possible implementation manners of the embodiments of the present application, the front cover plate 210 can be configured with a fourth return air opening. Alternatively, referring to Figure 4 and Figure 5 , the front cover plate 210 and the second tank 120 can enclose to form a fourth return air opening 212, which is used to communicate the second chamber 121 and the heat exchange compartment 122, so that the air in the second chamber 121 can flow to the heat exchange compartment 122 through the fourth return air opening 212.

[0138] The return air path between the second chamber 121 and the heat exchange compartment 122 can be: the second chamber 121→the fourth return air opening 212→the heat exchange compartment 122.

[0139] In some possible implementation manners of the embodiments of the present application, referring to Figure 3 and Figure 5 , the air duct assembly 20 can further include a rear cover plate 220. The rear cover plate 220 can be arranged at the rear side of the front cover plate 210. The rear cover plate 220 can be connected with the front cover plate 210 by clamping and / or fixed connection by fasteners. The rear cover plate 220 and the front cover plate 210 can enclose to form a supply air cavity 201.

[0140] In some embodiments, the rear cover plate 220 can include a frame part 227 and a plate part 228 as shown in Figure 6 . The frame part 227 can be connected to the front cover plate 210. The plate part 228 can be arranged at the rear side of the frame part 227. The plate part 228 and the front cover plate 210 are spaced apart to enclose the supply air cavity 201 between the rear cover plate 220 and the front cover plate 210.

[0141] Referring to Figure 5 , the fourth return air opening 212 is not communicated with the supply air cavity 201, or in other words, the fourth return air opening 212 is configured on the front cover plate 210 outside the supply air cavity 201.

[0142] In some possible implementation manners of the embodiments of the present application, the rear cover plate 220 can be configured with a first supply air opening 226, which is used to communicate the heat exchange compartment 122 and the supply air cavity 201, so that the air in the heat exchange compartment 122 can flow to the supply air cavity 201 through the first supply air opening 226. In some possible implementation manners of the embodiments of the present application, the rear cover plate 220 can be configured with a first supply air opening 226, which is used to communicate the heat exchange compartment 122 and the supply air cavity 201, so that the air in the heat exchange compartment 122 can flow to the supply air cavity 201 through the first supply air opening 226.

[0143] In some possible implementation manners of the embodiments of the present application, referring to Figure 3 and Figure 6 The front cover plate 210 can be configured with a second air supply port 211 for communicating the air supply cavity 201 and the second chamber 121, so that the air in the air supply cavity 201 can flow into the second chamber 121 through the second air supply port 211.

[0144] The air supply path between the heat exchange bin 122 and the second chamber 121 can be: the heat exchange bin 122→the first air supply port 226→the air supply cavity 201→the second air supply port 211→the second chamber 121.

[0145] In some possible implementation manners of the embodiments of the present application, referring to Figure 3 and Figure 7 The air duct assembly 20 can further include a fan 240, which can be arranged in the air supply cavity 201. For example, referring to Figure 7 The fan 240 can be arranged on the side of the front cover plate 210 facing the rear cover plate 220. It can be understood that in another possible implementation manner of the embodiments of the present application, the fan 240 can also be arranged on the side of the rear cover plate 220 facing the front cover plate 210. The fan 240 is used to make the air in the heat exchange bin 122 flow to the air supply cavity 201.

[0146] When the fan 240 works, the air in the heat exchange bin 122 flows to the air supply cavity 201 through the first air supply port 226, so that a relatively low air pressure area is formed in the heat exchange bin 122, and the air pressure in the heat exchange bin 122 is less than the air pressure in the second chamber 121. The air pressure difference between the second chamber 121 and the heat exchange bin 122 causes the air in the second chamber 121 to flow to the heat exchange bin 122 through the fourth air return port 212. After heat exchange with the evaporator in the heat exchange bin 122, the temperature of the air in the heat exchange bin 122 is reduced, and the air in the heat exchange bin 122 flows to the air supply cavity 201 through the first air supply port 226. Part of the air in the air supply cavity 201 flows into the second chamber 121 through the second air supply port 211, so as to reduce the temperature in the second chamber 121 and achieve refrigeration of the second chamber 121.

[0147] In some possible implementation manners of the embodiments of the present application, the air duct assembly 20 can also communicate the first chamber 111 and the heat exchange bin 122 to refrigerate the first chamber 111.

[0148] Specifically, referring to Figure 2 , Figure 3 , Figure 8 and Figure 9 The first tank 110 can be configured with a third air supply port 113, which communicates with the first chamber 111.

[0149] Referring to Figure 3The second tank 120 can be configured with a fourth air supply opening 124, which can be in communication with the air supply cavity 201. Exemplarily, referring to Figure 7 The back cover plate 220 can further be configured with a fifth air supply opening 2211, which is in communication with the fourth air supply opening 124 and the air supply cavity 201 respectively, so that the air in the air supply cavity 201 can flow to the fourth air supply opening 124 through the fifth air supply opening 2211.

[0150] Exemplarily, referring to Figure 3 , Figure 8 and Figure 10 The refrigerator can further include a second communication member 40, which can have a second communication cavity 401, and the second communication member 40 is connected to the first tank 110 and the second tank 120 respectively, and the second communication cavity 401 is in communication with the third air supply opening 113 and the fourth air supply opening 124, so as to communicate the first compartment 111 with the air supply cavity 201, so that the cold air in the air supply cavity 201 can flow to the first compartment 111 to cool the first compartment 111.

[0151] The air supply path between the heat exchange bin 122 and the first compartment 111 can be: heat exchange bin 122→first air supply opening 226→air supply cavity 201→fifth air supply opening 2211→fourth air supply opening 124→second communication cavity 401→third air supply opening 113→first compartment 111.

[0152] In some possible implementation manners of the embodiments of the present application, referring to Figure 6 , Figure 11 , Figure 12 and Figure 13 The back cover plate 220 and the front cover plate 210 can further enclose a second return air cavity 203, which is independent of the air supply cavity 201, or in other words, the second return air cavity 203 is not in communication with the air supply cavity 201.

[0153] Exemplarily, referring to Figure 6 and Figure 12 In the implementation manner in which the back cover plate 220 includes the frame portion 227 and the plate body portion 228, the back cover plate 220 can further include a partition portion 229, which can be plate-shaped, block-shaped or other shapes, and the partition portion 229 divides the space enclosed by the frame portion 227, the plate body portion 228 and the front cover plate 210 into the air supply cavity 201 and the second return air cavity 203 which are independent of each other.

[0154] In some possible implementation manners of the embodiments of the present application, the second return air cavity 203 is in communication with the first compartment 111, so that the air in the first compartment 111 can flow to the second return air cavity 203. Referring to Figure 5 and Figure 9The first box body 110 can be configured with a first air return opening 112 which is in communication with the first chamber 111.

[0155] With reference to Figure 5 and Figure 10 The second box body 120 can be configured with a sixth air return opening 123 which can be in communication with the second air return cavity 203. Exemplarily, with reference to Figure 14 、 Figure 15 and Figure 16 The back cover plate 220 can also be configured with a second air return opening 225. The second air return opening 225 is in communication with the sixth air return opening 123 and the second air return cavity 203 respectively, so that the second air return cavity 203 can be in communication with the sixth air return opening 123 through the second air return opening 225.

[0156] With reference to Figure 5 、 Figure 9 and Figure 10 The refrigerator can further include a first communication member 30 which can have a first communication cavity 301, and the first communication member 30 is connected to the first box body 110 and the second box body 120 respectively, and the first communication cavity 301 is in communication with the first air return opening 112 and the sixth air return opening 123, thereby connecting the first chamber 111 and the second air return cavity 203, so that the air in the first chamber 111 can flow to the second air return cavity 203.

[0157] The air return path between the first chamber 111 and the second air return cavity 203 can be: the first chamber 111→the first air return opening 112→the first communication cavity 301→the sixth air return opening 123→the second air return opening 225→the second air return cavity 203.

[0158] In some possible implementation manners of the embodiments of the present application, the second communication member 40 and the first communication member 30 can be integrally arranged, so as to reduce the number of components in the refrigerator and improve the assembly efficiency of the refrigerator.

[0159] In some possible implementation manners of the embodiments of the present application, with reference to Figure 9 The first air return opening 112 can be configured on the side of the first box body 110 close to the second box body 120. In the implementation manner in which the second box body 120 is arranged at the bottom of the first box body 110, the side of the first box body 110 close to the second box body 120 is the bottom wall of the first box body 110. In this way, the first communication member 30 can be connected to the bottom wall of the first box body 110, so as to reduce the space occupied by the first communication member 30 on the rear side of the first box body 110 for filling the foaming material, thereby increasing the thickness of the foaming material on the rear side of the first box body 110, improving the heat preservation effect of the foaming material on the first box body 110, reducing the loss of cold energy of the first box body 110, and thereby reducing the energy consumption of the refrigerator.

[0160] It can be understood that in another possible implementation manner of the embodiment of the present application, when the gap between the first tank 110 and the second tank 120 is too small to arrange the first communication member 30, the fifth air return opening 112 can also be arranged on the rear wall of the first tank 110, or part of the fifth air return opening 112 is arranged on the bottom wall of the first tank 110, and the other part of the fifth air return opening 112 is arranged on the rear wall of the first tank 110, so as to connect the first communication member 30 to the first tank 110.

[0161] In some possible implementation manners of the embodiment of the present application, referring to Figure 14-16 , and Figure 17-19 , the third air return cavity 204 can also be enclosed by the rear cover plate 220 and the front cover plate 210. The third air return cavity 204 is independent of the air supply cavity 201, or the third air return cavity 204 is not communicated with the air supply cavity 201. The third air return cavity 204 is communicated with the second air return cavity 203, so that the air in the second air return cavity 203 can flow to the third air return cavity 204.

[0162] In some possible implementation manners of the embodiment of the present application, the rear cover plate 220 can be arranged with a seventh air return opening, and the seventh air return opening is communicated with the third air return cavity 204 and the heat exchange bin 122 respectively, so that the air in the third air return cavity 204 can flow to the heat exchange bin 122.

[0163] In another possible implementation manner of the embodiment of the present application, referring to Figure 3 , the rear cover plate 220 and the second tank 120 can enclose the seventh air return opening 231. The seventh air return opening 231 can be communicated with the third air return cavity 204 and the heat exchange bin 122 respectively, so that the air in the third air return cavity 204 can flow to the heat exchange bin 122.

[0164] Exemplarily, referring to Figure 16 , the edge of the rear cover plate 220 can be arranged with a notch portion 2210. Referring to Figure 3 , the notch portion 2210 and the second tank 120 can enclose the seventh air return opening 231. The seventh air return opening 231 is communicated with the third air return cavity 204 and the heat exchange bin 122 respectively, so that the air in the third air return cavity 204 can flow to the heat exchange bin 122 through the seventh air return opening 231.

[0165] The air return path between the second air return cavity 203 and the heat exchange bin 122 can be: the second air return cavity 203→the third air return cavity 204→the seventh air return opening 231→the heat exchange bin 122.

[0166] Then, the air return path between the first chamber 111 and the heat exchange bin 122 can be: the first chamber 111→ the sixth air return opening 112→ the first communication cavity 301→ the sixth air return opening 123→ the second air return opening 225→ the second air return cavity 203→ the third air return cavity 204→ the seventh air return opening 231→ the heat exchange bin 122.

[0167] In some possible implementation manners of the embodiments of the present application, the second air return opening 225 can be located at one end of the second air return cavity 203 close to the first tank 110, and the seventh air return opening 231 can be located at one end of the third air return cavity 204 away from the first tank 110, so that along the height direction of the second tank 120, the second air return opening 225 is close to the first tank 110, and the seventh air return opening 231 is away from the first tank 110, so that the distance between the second air return opening 225 and the seventh air return opening 231 is increased, thereby increasing the capacity of the second air return cavity 203 and the third air return cavity 204, and increasing the air return effect of the second air return cavity 203 and the third air return cavity 204 on the air from the first chamber 111.

[0168] In some possible implementation manners of the embodiments of the present application, along the width direction X of the second tank 120, the second air supply opening 211 on the front cover plate 210 can be spaced apart from the edge of the front cover plate 210, so that the second air supply opening 211 can be away from the edge of the second chamber 121, reducing the case that cold air is gathered at the edge of the second chamber 121, and improving the refrigeration effect on the middle position of the second chamber 121.

[0169] In the related art refrigerator, only the air supply cavity 201 is enclosed between the rear cover plate 220 and the front cover plate 210, and after the cold air in the heat exchange bin 122 flows to the air supply cavity 201 through the first air supply opening 226, the air in the air supply cavity 201 basically will not continue to flow to the edge of the rear cover plate 220 along the width direction X and the height direction Z after flowing to the second air supply opening 211, so the space between the position corresponding to the second air supply opening 211 on the rear cover plate 220 and the edge of the width direction X of the rear cover plate 220 has a small amount of air flowing through it, which can be considered as an invalid air supply area; the space between the position corresponding to the second air supply opening 211 on the rear cover plate 220 and the edge of the height direction Z of the rear cover plate 220 also has a small amount of air flowing through it, which can also be considered as an invalid air supply area.

[0170] In some possible implementation manners of the embodiments of the present application, Figure 16 and Figure 19The edge of the air supply cavity 201 and the edge of the back cover plate 220 can be spaced apart along the width direction X of the second tank 120. The second air return cavity 203 can extend along the height direction Z of the second tank 120, and the second air return cavity 203 can be located at at least one end of the air supply cavity 201 along the width direction X of the second tank 120. In this way, the space between the position corresponding to the second air supply port 211 on the back cover plate 220 and the edge of the back cover plate 220 in the width direction X can be utilized by the second air return cavity 203, so that the invalid air supply area at both ends of the back cover plate 220 in the width direction X is utilized, and air return between the first chamber 111 and the heat exchange compartment 122 can be performed without increasing the size of the back cover plate 220.

[0171] In some embodiments, with reference to Figure 16 The second air return cavity 203 can be one, and the second air return cavity 203 can be located at any one end of the air supply cavity 201 along the width direction X of the second tank 120. Compared with the implementation mode in which the second air return cavity 203 is arranged at both ends of the air supply cavity 201 along the width direction X, the volume of the second air return cavity 203 is reduced, so that the air flow rate in the second air return cavity 203 is increased, and the air flow rate between the first chamber 111 and the second air return cavity 203 is increased.

[0172] In some embodiments, with reference to Figure 19 The seventh air return port 231 can be two, and the two seventh air return ports 231 can be arranged at both sides of the first tank 110 along the width direction X. The second air return cavity 203 can be two, and the two second air return cavities 203 can be located at both ends of the air supply cavity 201 along the width direction X of the second tank 120. Each second air return cavity 203 corresponds to one seventh air return port 231, so that the first chamber 111 returns air from both ends in the width direction X, so as to reduce the formation of a local relatively high-temperature area at the other end of the first chamber 111 in the width direction X when the first chamber 111 returns air from one end in the width direction X.

[0173] In some possible implementation modes of the embodiments of the present application, the second air return port 225 can be located at one end of the back cover plate 220 close to the first tank 110, and the seventh air return port 231 can be located at one end of the back cover plate 220 away from the first tank 110, so as to increase the spacing between the second air return port 225 and the seventh air return port 231 along the height direction Z of the second tank 120, thereby increasing the capacity of the second air return cavity 203 and increasing the air return efficiency of the first chamber 111.

[0174] The third return air cavity 204 can be located at the end of the air supply cavity 201 away from the first tank 110. Thus, the space between the position on the back cover plate 220 corresponding to the second air supply opening 211 and the end of the back cover plate 220 away from the first tank 110 can be utilized by the third return air cavity 204. Without increasing the size of the back cover plate 220, the invalid air supply area of the end of the back cover plate 220 away from the first tank 110 is utilized, and the return air between the first chamber 111 and the heat exchange compartment 122 can be conducted.

[0175] The third return air cavity 204 can extend along the width direction X of the back cover plate 220. The third return air cavity 204 is in communication with the second return air cavity 203. The bottom end of the third return air cavity 204 can be in communication with the seventh return air opening 231, so that the third return air cavity 204 is in communication with the heat exchange compartment 122. Thus, the second return air cavity 203 can be in communication with the heat exchange compartment 122 through the third return air cavity 204.

[0176] Since the size of the bottom end of the third return air cavity 204 along the width direction X of the back cover plate 220 is greater than the size of the bottom end of the second return air cavity 203 along the width direction X of the back cover plate 220, the air in the second return air cavity 203 can be conducted out of the heat exchange compartment 122 through the bottom end of the third return air cavity 204. The coverage range of the air flowing to the heat exchange compartment 122 along the width direction X of the back cover plate 220 can be increased, and the contact efficiency of the air flowing to the heat exchange compartment 122 with the evaporator is improved. Thus, the refrigeration efficiency of the evaporator on the air flowing to the heat exchange compartment 122 from the second return air cavity 203 is improved.

[0177] When the fan 240 is working, the air in the heat exchange compartment 122 flows to the air supply cavity 201, so that a relatively low air pressure area is formed in the heat exchange compartment 122. The air pressure in the heat exchange compartment 122 is less than the air pressure in the second return air cavity 203. The air pressure difference between the second return air cavity 203 and the heat exchange compartment 122 causes the air in the first chamber 111 to flow to the second return air cavity 203 through the second return air opening 225. The air in the second return air cavity 203 flows to the heat exchange compartment 122 through the seventh return air opening 231. After heat exchange with the evaporator in the heat exchange compartment 122, the temperature of the air in the heat exchange compartment 122 is reduced. The air in the heat exchange compartment 122 flows to the air supply cavity 201. Part of the air in the air supply cavity 201 flows to the first chamber 111 through the fifth air supply opening 2211, so as to reduce the temperature in the first chamber 111 and achieve refrigeration of the first chamber 111.

[0178] In some possible implementation manners of the embodiments of the present application, reference can be made to Figure 6 , Figure 7 , Figure 10 , Figure 11 and Figure 12 , Figure 20-23 , Figure 24-27 , and Figure 28-31The side of the rear cover plate 220 facing away from the front cover plate 210 can be configured with a recessed portion 221 recessed toward the front cover plate 210. Correspondingly, the side of the rear cover plate 220 facing toward the front cover plate 210 can be formed with a protruding portion corresponding to the recessed portion 221, the protruding portion protruding toward the front cover plate 210, so that the thickness of the rear cover plate 220 corresponding to the recessed portion 221 is substantially the same as the thickness of the rear cover plate 220 other than the recessed portion 221, the thickness of the rear cover plate 220 corresponding to the recessed portion 221 is reduced, the space between the rear cover plate 220 other than the recessed portion 221 and the front cover plate 210 is occupied, and the utilization rate of the space between the rear cover plate 220 other than the recessed portion 221 and the front cover plate 210 for the air supply cavity 201 and the recessed portion 221 is improved. The recessed portion 221 can be substantially rectangular (see Figure 25 and Figure 29 ), or can be other special shapes (see Figure 21 ).

[0179] Along the depth direction Y of the second tank 120, the distance between the recessed portion 221 and the front cover plate 210 can be less than the distance between the rear cover plate 220 other than the recessed portion 221 and the front cover plate 210, and the rear cover plate 220 corresponding to the recessed portion 221 still has part of the air supply cavity 201 between the front cover plate 210, which reduces the influence of the projection of the recessed portion 221 on the shape of the air supply cavity 201 on the front cover plate 210, thereby reducing the influence of the recessed portion 221 on the air supply path. In addition, without increasing the size of the rear cover plate 220 in the depth direction Y, the space corresponding to the recessed portion 221 is formed on the side of the rear cover plate 220 facing away from the front cover plate 210.

[0180] Referring to Figure 21 , Figure 25 and Figure 29 , along the depth direction Y of the second tank 120, the recessed portion 221 can correspond to at least part of the air supply cavity 201. In other words, the projection of the recessed portion 221 on the front cover plate 210 overlaps at least part of the projection of the air supply cavity 201 on the front cover plate 210 along the depth direction Y of the second tank 120.

[0181] In some possible implementation manners of the embodiments of the present application, along the width direction X of the second tank 120, the projection of the recess 221 on the side wall of the second tank 120 overlaps with the part of the projection of the air supply cavity 201 on the side wall of the second tank 120 that does not correspond to the recess 221. In this way, the recess 221 and the air supply cavity 201 share the part of the dimension along the depth direction between the rear cover plate 220 and the front cover plate 210 that is outside the recess 221, thereby reducing the dimension of the air duct assembly 20 along the depth direction Y. In addition, the recess 221 only occupies part of the dimension of the original air supply cavity 201 (the air supply cavity 201 when no recess 221 is constructed on the rear cover plate 220) along the width direction X, thereby reducing the influence of the recess 221 on the width of the air supply cavity 201, and further reducing the influence of the recess 221 on the capacity and air supply effect of the air supply cavity 201.

[0182] In some possible implementation manners of the embodiments of the present application, along the height direction Z of the second tank 120, the projection of the recess 221 on the top wall of the second tank 120 overlaps with the part of the projection of the air supply cavity 201 on the top wall of the second tank 120 that does not correspond to the recess 221. In this way, the recess 221 and the air supply cavity 201 share the part of the dimension along the depth direction between the rear cover plate 220 and the front cover plate 210 that is outside the recess 221, thereby reducing the dimension of the air duct assembly 20 along the depth direction Y. In addition, the recess 221 only occupies part of the dimension of the original air supply cavity 201 (the air supply cavity 201 when no recess 221 is constructed on the rear cover plate 220) along the height direction Z, thereby reducing the influence of the recess 221 on the height of the air supply cavity 201, and further reducing the influence of the recess 221 on the capacity and air supply effect of the air supply cavity 201.

[0183] Alternatively, with reference to Figure 6 , Figure 7 and Figure 11 , along the depth direction Y of the second tank 120, part of the recess 221 corresponds to at least part of the air supply cavity 201, and another part of the recess 221 corresponds to at least part of the second return air cavity 203. In other words, along the depth direction Y of the second tank 120, part of the projection of the recess 221 on the front cover plate 210 overlaps with at least part of the projection of the air supply cavity 201 on the front cover plate 210, and another part of the projection of the recess 221 on the front cover plate 210 overlaps with at least part of the projection of the second return air cavity 203 on the front cover plate 210.

[0184] A portion of the projection of the recess 221 on the front cover plate 210 partially overlaps at least a portion of the projection of the air supply cavity 201 on the front cover plate 210 along the width direction X of the second tank 120, and another portion of the projection of the recess 221 on the front cover plate 210 partially overlaps at least a portion of the projection of the second return air cavity 203 on the front cover plate 210 along the width direction X of the second tank 120. In this way, without increasing the size of the rear cover plate 220 along the depth direction Y, the space corresponding to the second return air cavity 203 and the recess 221 is formed on both sides of the rear cover plate 220 along the depth direction Y.

[0185] Since the recess 221 is recessed towards the front cover plate 210, the construction of the recess 221 on the rear cover plate 220 does not increase the size of the air duct assembly 20 along the depth direction Y of the second tank 120.

[0186] With reference to Figure 3 , the side of the recess 221 close to the front cover plate 210 can be spaced apart from the front cover plate 210, or the plate body part 228 corresponding to the recess 221 is spaced apart from the front cover plate 210, so that along the depth direction Y of the second tank 120, the distance between the recess 221 and the front cover plate 210 is less than the distance between the rear cover plate 220 excluding the recess 221 and the front cover plate 210, and the rear cover plate 220 corresponding to the recess 221 still has a portion of the air supply cavity 201 with the front cover plate 210, thereby reducing the influence of the recess 221 on the shape of the projection of the air supply cavity 201 on the front cover plate 210, and reducing the influence of the recess 221 on the air supply path. In addition, without increasing the size of the rear cover plate 220 along the depth direction Y, the space corresponding to the recess 221 is formed on the side of the rear cover plate 220 away from the front cover plate 210, and the recess 221 only occupies a portion of the space of the original air supply cavity 201 (the air supply cavity 201 when the recess 221 is not constructed on the rear cover plate 220) along the depth direction Y of the second tank 120, thereby reducing the influence of the recess 221 on the capacity of the air supply cavity 201.

[0187] In some possible implementation manners of the embodiments of the present application, with reference to Figure 3 , and Figure 20-31 , the air duct assembly 20 can further include a return air cover plate 230, which can be arranged on the side of the rear cover plate 220 away from the front cover plate 210. The return air cover plate 230 can be fixedly connected with the rear cover plate 220 by fasteners. At least a portion of the return air cover plate 230 can cover the recess 221 and form the first return air cavity 202 together with the recess 221.

[0188] The rear cover plate 220 can be constructed with a first return air opening 224 for communicating the second return air cavity 203 with the first return air cavity 202.

[0189] In the implementation where the recessed portion 221 corresponds to at least part of the air supply cavity 201, the recessed portion 221 can be adjacent to the second return air cavity 203 along the width direction X of the second tank 120. Referring to Figure 22 and Figure 23 The back cover plate 220 can include a partitioning side wall 223, which can be partitioned between the first return air cavity 202 and the second return air cavity 203, i.e., the first return air cavity 202 and the second return air cavity 203 are respectively located on two sides of the partitioning side wall 223 along the width direction X of the second tank 120. The partitioning side wall 223 can be configured with a first return air opening 224 for communicating the second return air cavity 203 and the first return air cavity 202, so that the air in the second return air cavity 203 can flow to the first return air cavity 202 via the first return air opening 224.

[0190] Referring to Figure 6 and Figure 7 In the implementation where part of the recessed portion 221 corresponds to at least part of the air supply cavity 201, and another part of the recessed portion 221 corresponds to at least part of the first cavity, the cavity wall of the second return air cavity 203 away from the front cover plate 210 can be configured with a first return air opening 224 for communicating the second return air cavity 203 and the first return air cavity 202, so that the air in the second return air cavity 203 can flow to the first return air cavity 202 via the first return air opening 224.

[0191] In some possible implementations of the embodiments of the present application, the first return air cavity 202 can also communicate with the heat exchange compartment 122.

[0192] In some embodiments, the return air cover plate 230 can be configured with a third return air opening for communicating the first return air cavity 202 and the heat exchange compartment 122.

[0193] In another embodiment, referring to Figure 3 The end of the return air cover plate 230 away from the first tank 110 and the back cover plate 220 can enclose a third return air opening 222, and the end of the return air cover plate 230 away from the first tank 110 can be spaced apart from the side wall of the second tank 120 away from the first tank 110, so that the first return air cavity 202 can communicate with the heat exchange compartment 122 through the third return air opening 222 and the space between the return air cover plate 230 and the side wall of the second tank 120 away from the first tank 110.

[0194] The return air path between the first chamber 111 and the heat exchange compartment 122 can be: the first chamber 111→the sixth return air opening 112→the first communication cavity 301→the sixth return air opening 123→the second return air opening 225→the second return air cavity 203→the first return air opening 224→the first return air cavity 202→the third return air opening 222→the heat exchange compartment 122.

[0195] When the fan 240 is working, the air in the heat exchange bin 122 flows to the air supply cavity 201, so that a relatively low air pressure area is formed in the heat exchange bin 122. The air pressure in the heat exchange bin 122 is lower than the air pressure in the second return air cavity 203. The air pressure difference between the heat exchange bin 122 and the second return air cavity 203 causes the air in the first compartment 111 to flow to the second return air cavity 203 through the second return air port 225, and the air in the second return air cavity 203 flows to the first return air cavity 202 through the first return air port 224. The air in the first return air cavity 202 flows to the heat exchange bin 122 through the third return air port 222. After heat exchange with the evaporator in the heat exchange bin 122, the temperature of the air in the heat exchange bin 122 is reduced. The air in the heat exchange bin 122 flows to the air supply cavity 201. Part of the air in the air supply cavity 201 flows to the first compartment 111 through the fifth air supply port 2211, so as to reduce the temperature in the first compartment 111 and achieve refrigeration of the first compartment 111.

[0196] In some possible implementation manners of the embodiments of the present application, the second return air port 225 can be located at one end of the first return air cavity 202 close to the first tank 110. The return air cover plate 230 away from the one end of the first tank 110 and the back cover plate 220 away from the one end of the first tank 110 can be used to enclose the third return air port 222. In this way, along the height direction of the second tank 120, the second return air port 225 is close to the first tank 110, and the third return air port 222 is away from the first tank 110, so that the distance between the second return air port 225 and the third return air port 222 is increased, thereby increasing the capacity of the first return air cavity 202 and the return air effect of the first return air cavity 202 on the air from the first compartment 111.

[0197] In the embodiments of the present application, the recess 221 is arranged on the side of the back cover plate 220 away from the front cover plate 210. The return air cover plate 230 is connected to the side of the back cover plate 220 away from the front cover plate 210. The return air cover plate 230 and the recess 221 enclose the first return air cavity 202. The first return air cavity 202 is in communication with the second return air cavity 203 and the heat exchange bin 122. In this way, the return air from the first compartment 111 flows to the heat exchange bin 122 through the second return air cavity 203 and the first return air cavity 202 in sequence. The total volume of the second return air cavity 203 and the first return air cavity 202 is increased, thereby improving the return air efficiency of the first compartment 111.

[0198] The side of the return air cover plate 230 away from the front cover plate 210 can be substantially flush with the side of the back cover plate 220 away from the front cover plate 210. In this way, after the return air cover plate 230 is arranged on the side of the back cover plate 220 away from the front cover plate 210, the size of the air duct assembly 20 in the depth direction Y of the second tank 120 is not substantially increased. The air duct assembly 20 can realize the function of returning air to the first compartment 111 without increasing the size in the depth direction Y, thereby reducing the size of the air duct assembly 20 in the depth direction Y of the refrigerator.

[0199] In some possible implementation manners of the embodiments of the present application, referring to Figure 16 , Figure 19 , Figure 22 , Figure 26 and Figure 30 , the part of the cavity wall of the second return air cavity 203 away from the front cover plate 210 is recessed in the direction away from the front cover plate 210 and forms a wind collecting cavity 205, and the second return air opening 225 can be configured on the cavity wall of the wind collecting cavity 205. The wind collecting cavity 205 can be a part of the second return air cavity 203, and the wind collecting cavity 205 can increase the volume of the second return air cavity 203, thereby improving the return air effect on the first chamber 111.

[0200] In some possible implementation manners of the embodiments of the present application, referring to Figure 6 and Figure 13 , the return air cover plate 230 can be configured with the second return air opening 225, and the second return air opening 225 is used for communicating the first return air cavity 202 and the first chamber 111, so that the air in the first chamber 111 can flow to the first return air cavity 202 through the second return air opening 225.

[0201] The part of the cavity wall of the first return air cavity 202 away from the front cover plate 210 is recessed in the direction away from the front cover plate 210 and forms a wind collecting cavity 205, and the second return air opening 225 can be configured on the cavity wall of the wind collecting cavity 205. The wind collecting cavity 205 can be a part of the first return air cavity 202, and the wind collecting cavity 205 can increase the volume of the first return air cavity 202, thereby improving the return air effect on the first chamber 111.

[0202] The size of the wind collecting cavity 205 in the above embodiments along the depth direction Y of the second tank 120 can decrease from the end close to the first tank 110 to the end away from the first tank 110, so that the cavity wall of the wind collecting cavity 205 can guide the air flowing forward, and reduce the air retention in the wind collecting cavity 205.

[0203] In some possible implementation manners of the embodiments of the present application, referring to Figure 7 and Figure 25 , the size of the first return air cavity 202 along the width direction X of the second tank 120 increases from the end close to the first tank 110 to the end away from the first tank 110, so that the width covered by the air in the first return air cavity 202 gradually increases in the process of flowing to the end away from the first tank 110, so as to increase the coverage range of the air flowing to the heat exchange compartment 122 along the width direction X of the rear cover plate 220, improve the contact efficiency of the air flowing to the heat exchange compartment 122 with the evaporator, and thereby improve the refrigeration efficiency of the evaporator on the air flowing to the heat exchange compartment 122 from the second return air cavity 203.

[0204] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0205] The foregoing description has been presented for the purpose of illustration and description. It is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. Modifications and variations are possible in light of the above teachings or can be acquired from practice of the embodiments. The described embodiments were chosen and described in order to best explain the principles of the embodiments and its practical application. This enables others skilled in the art to best use the embodiments in various embodiments and with various modifications as are suited to the particular use contemplated.

Claims

1. A refrigerator, characterized in that: include: A first tank (110) is formed with a first chamber (111); A second box liner (120) is arranged at one end of the first box liner (110) along its own height direction; The air duct assembly (20) is arranged in the second box (120), and the inner cavity of the second box (120) is divided into a second chamber (121) and a heat exchange chamber (122), wherein the second chamber (121) is located at the front side of the air duct assembly (20), and the heat exchange chamber (122) is located at the rear side of the air duct assembly (20); the air duct assembly (20) includes: a front cover plate (210), located at the rear side of the second chamber (121); The rear cover (220) is arranged on a side of the front cover (210) away from the second chamber (121), and an air supply cavity (201) is formed between the rear cover and the front cover (210). The air supply cavity (201) is respectively connected to the heat exchange chamber (122), the first chamber (111), and the second chamber (121); along the width direction of the second liner (120), the edge of the air supply cavity (201) is spaced apart from the edge of the rear cover (220); A second return air cavity (203) and a third return air cavity (204) that are in communication are enclosed and formed between the rear cover plate (220) and the front cover plate (210); The second return air chamber (203) is located at at least one end of the air supply chamber (201) along the width direction of the second box (120), and the second return air chamber (203) is used to communicate with the first chamber (111) and the third return air chamber (204); The third return air chamber (204) is located at one end of the air supply chamber (201) away from the first box (110), and the third return air chamber (204) is in communication with the heat exchange chamber (122).

2. The refrigerator according to claim 1, wherein: The rear cover plate (220) is configured with a second return air port (225), and the second return air port (225) is used to connect the second return air cavity (203) and the first chamber (111).

3. The refrigerator according to claim 2, characterized in that The second return air port (225) is located at one end of the second return air cavity (203) close to the first box (110); A notch portion (2210) is formed at one end of the rear cover plate (220) facing away from the first box liner (110), and the notch portion (2210) and the side wall of the second box liner (120) facing away from the first box liner (110) are enclosed to form a seventh return air outlet (231), and the seventh return air outlet (231) is respectively connected to the third return air cavity (204) and the heat exchange chamber (122).

4. The refrigerator according to claim 2, characterized in that An air collecting chamber (205) is formed on a side of the rear cover plate (220) facing the front cover plate (210), and the air collecting chamber (205) is recessed in a direction away from the front cover plate (210); The air collecting chamber (205) is communicated with the second air return port (225) and the second air return chamber (203) respectively.

5. The refrigerator according to claim 4, characterized in that The dimension of the air collecting chamber (205) in the depth direction of the second box bladder (120) decreases from an end close to the first box bladder (110) to an end away from the first box bladder (110).

6. The refrigerator according to any one of claims 1 to 5, characterized in that: The rear cover plate (220) is configured with a first air supply port (226), and the first air supply port (226) is used to connect the heat exchange chamber (122) and the air supply cavity (201); The front cover (210) is configured with a second air supply port (211), and the second air supply port (211) is used to connect the air supply cavity (201) and the second chamber (121).

7. The refrigerator according to any one of claims 1 to 5, characterized in that: The air duct assembly (20) further includes a fan (240), wherein the fan (240) is disposed in the air supply cavity (201), and the fan (240) is connected to the front cover plate (210) or the rear cover plate (220).

8. The refrigerator according to any one of claims 1 to 5, characterized in that: A fourth air return port (212) is formed at one end of the front cover plate (210) facing away from the first box (110), and the fourth air return port (212) is used to connect the second chamber (121) and the heat exchange chamber (122).

9. The refrigerator according to any one of claims 1 to 5, characterized in that: The first box (110) is configured with a fifth return air port (112), and the fifth return air port (112) is in communication with the first chamber (111); The second box (120) is configured with a sixth return air port (123), and the sixth return air port (123) is in communication with the second return air cavity (203); The refrigerator further comprises a first connecting piece (30), the first connecting piece (30) having a first connecting cavity (301), the first connecting piece (30) being connected to the first box liner (110) and the second box liner (120), respectively, and the first connecting cavity (301) being connected to the fifth return air port (112) and the sixth return air port (123).

10. The refrigerator according to claim 9, characterized in that The first box (110) is further configured with a third air supply port (113), and the third air supply port (113) is communicated with the first chamber (111); The second box (120) is further configured with a fourth air supply port (124), and the fourth air supply port (124) is communicated with the air supply cavity (201); The refrigerator further includes a second connecting piece (40), the second connecting piece (40) having a second connecting cavity (401), the second connecting piece (40) being connected to the first box liner (110) and the second box liner (120), respectively, and the second connecting cavity (401) being connected to the third air supply port (113) and the fourth air supply port (124).

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