AU2021343048A1

AU2021343048A1 - Refrigerator

Info

Publication number: AU2021343048A1
Application number: AU2021343048A
Authority: AU
Inventors: Xiaoqian WANG; Mingfang YANG
Original assignee: Hisense Refrigerator Co Ltd
Current assignee: Hisense Refrigerator Co Ltd
Priority date: 2020-09-15
Filing date: 2021-04-22
Publication date: 2023-03-23
Anticipated expiration: 2041-04-22
Also published as: CN114183964A; AU2021343048A8; AU2021343048B2; WO2022057257A1

Abstract

Disclosed is a refrigerator, comprising a freezing chamber, which is internally provided with a top-mounted air duct assembly and a back air duct assembly, wherein the top-mounted air duct assembly is arranged close to the top of the freezing chamber; a gap is provided between the top-mounted air duct assembly and a top wall face of the freezing chamber; an evaporator and a fan are arranged in the top-mounted air duct assembly; the top-mounted air duct assembly is provided with a first top-mounted air duct return air inlet, a second top-mounted air duct return air inlet and a top-mounted air duct air outlet; the two top-mounted air duct return air inlets are respectively arranged at the top and the bottom of the top-mounted air duct assembly; the back air duct assembly is fixed on an inner side of a rear wall of the freezing chamber, and is provided with a back air duct air inlet and a back air duct air outlet; the first top-mounted air duct return air inlet and the second top-mounted air duct return air inlet are both in communication with the freezing chamber; the top-mounted air duct air outlet is in communication with the back air duct air inlet; and the back air duct air outlet is in communication with the freezing chamber.

Description

REFRIGERATOR CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to Chinese Patent Application No. 202010968026.0, entitled "refrigerator", filed with the Chinese Patent Office on September 15, 2020, which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of refrigeration, and in particular, to a refrigerator.

BACKGROUND

[0003] At present, the use of refrigeration equipment such as refrigerators and freezers has been popularized, and provides great convenience for lives of people. An air duct circulation assembly in a freezing compartment of an existing vertical air-cooled refrigerator or freezer includes a fan, an evaporator and an air supply-return structure. The air duct circulation assembly is generally disposed at the back of a box body, and the evaporator is disposed in an air duct formed by the air supply-return structure. Therefore, a height of the air duct circulation assembly is generally large, for example, the refrigerator or freezer may reach 0.75 m. A height of the vertical air-cooled refrigerator or freezer is generally large, for example, the refrigerator or freezer may reach 1.5 meters. In order to achieve a good refrigeration effect, the air duct is generally of large circulation, that is, a size in a height direction of the refrigerator or freezer is as large as possible. Therefore, a volume of the existing air duct circulation assembly is large, resulting in a small usable volume of the refrigerator or freezer.

SUMMARY

[0004] Some embodiments of the present disclosure provide a refrigerator, includes: a freezing compartment, and a freezing compartment door body used for opening or closing the freezing compartment. The freezing compartment is provided therein with an overhead air duct assembly and a back air duct assembly. The overhead air duct assembly is disposed proximate to a top of the freezing compartment. The overhead air duct assembly and a top wall of the freezing compartment have a gap therebetween. The overhead air duct assembly is provided with an evaporator and a fan therein, and is provided with a first overhead air duct air-return inlet, a second overhead air duct air-return inlet and an overhead air duct air outlet thereon. The first overhead air duct air-return inlet is disposed at a top of the overhead air duct assembly, and the second overhead air duct air-return inlet is disposed at a bottom of the overhead air duct assembly. The back air duct assembly is fixed on an inside of a rear wall of the freezing compartment, and the back air duct assembly being provided with a back air duct air inlet and back air duct air outlet(s). The first overhead air duct air-return inlet and the second overhead air duct air-return inlet are communicated with the freezing compartment, the overhead air duct air outlet is communicated with the back air duct air inlet, and the back air duct air outlet(s) are communicated with the freezing compartment.

BRIEF DESCRIPTION OF THE DRAWINGS

[0005] In order to describe technical solutions in the embodiments of the present disclosure or the prior art more clearly, accompanying drawings to be used in the description of some embodiments or the prior art will be introduced briefly below. Obviously, the accompanying drawings to be described below are merely accompanying drawings of some embodiments of the present disclosure, and a person of ordinary skill in the art may obtain other drawings according to these drawings without creative effort.

[0006] FIG. 1 is a schematic diagram showing a structure of a refrigerator (without a freezing compartment door body), in accordance with the embodiments of the present disclosure;

[0007] FIG. 2 is a schematic diagram showing an exploded structure of a refrigerator, in accordance with the embodiments of the present disclosure;

[0008] FIG. 3 is an air path circulation diagram of a refrigerator from a perspective, in accordance with the embodiments of the present disclosure;

[0009] FIG. 4 is an air path circulation diagram of a refrigerator from another perspective, in accordance with the embodiments of the present disclosure;

[0010] FIG. 5 is an exploded schematic diagram of an overhead air duct assembly of a refrigerator, in accordance with the embodiments of the present disclosure;

[0011] FIG. 6 is a schematic diagram showing a three-dimensional structure of an overhead air duct assembly of a refrigerator from a perspective, in accordance with the embodiments of the present disclosure;

[0012] FIG. 7 is a schematic diagram showing a three-dimensional structure of an overhead air duct assembly of a refrigerator from another perspective, in accordance with the embodiments of the present disclosure;

[0013] FIG. 8 is a schematic diagram showing a three-dimensional structure of an overhead air duct cover plate of a refrigerator, in accordance with the embodiments of the present disclosure;

[0014] FIG. 9 is a schematic diagram showing a three-dimensional structure of a snapping member, in accordance with the embodiments of the present disclosure;

[0015] FIG. 10 is a schematic diagram showing a connection structure of a connection position of an overhead air duct cover plate and a back air duct cover plate in a refrigerator from a perspective, in accordance with the embodiments of the present disclosure;

[0016] FIG. 11 is a schematic diagram showing a connection structure of a connection position of an overhead air duct cover plate and a back air duct cover plate in a refrigerator from another perspective, in accordance with the embodiments of the present disclosure;

[0017] FIG. 12 is a schematic diagram 1 showing a local three-dimensional structure of a back air duct cover plate of a refrigerator, in accordance with the embodiments of the present disclosure;

[0018] FIG. 13 is a schematic diagram 2 showing a local three-dimensional structure of a back air duct cover plate of a refrigerator, in accordance with the embodiments of the present disclosure;

[0019] FIG. 14 is a schematic diagram showing a three-dimensional structure of a second snapping groove of a refrigerator, in accordance with the embodiments of the present disclosure;

[0020] FIG. 15 is a schematic diagram showing a connection structure of an upper cover plate and a lower cover plate of a refrigerator, in accordance with the embodiments of the present disclosure; and

[0021] FIG. 16 is a schematic diagram showing a structure of an upper cover plate and a lower cover plate, that are not connected, of a refrigerator, in accordance with the embodiments of the present disclosure.

DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present disclosure. However, the described embodiments are merely some but not all embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without paying any creative effort shall be included in the protection scope of the present disclosure.

[0023] In the description of the present disclosure, it will be understood that, orientations

or positional relationships indicated by the terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are

based on orientations or positional relationships shown in the drawings, which are merely to facilitate and simplify the description of the present disclosure, and are not to indicate or imply that the devices or elements referred to must have a particular orientation, or be constructed or operated in a particular orientation. Therefore, these terms should not be construed as limitations on the present disclosure.

[0024] In the description of the present disclosure, it will be noted that unless otherwise specified and restricted, the terms such as "installation", "communication" and "connection" should be understood broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection. Specific meanings of the above terms in the present disclosure may be understood by those skilled in the art according to specific situations.

[0025] The terms "first" and "second" are used for descriptive purposes only, and are not to be construed as indicating or implying a relative importance or implicitly indicating a number of indicated technical features. Therefore, the features defined with "first" or "second" may explicitly or implicitly include one or more of the features. In the description of

the present disclosure, the term "a plurality of' or "the plurality of" means two or more unless otherwise specified.

[0026] FIG. 1 is a schematic diagram showing a structure of a refrigerator in the embodiments of the present disclosure. FIG. 2 is a schematic diagram showing an exploded structure of a refrigerator in the embodiments of the present disclosure. FIG. 3 is an air path circulation diagram of a refrigerator from a perspective in the embodiments of the present disclosure. FIG. 4 is an air path circulation diagram of a refrigerator from another perspective in the embodiments of the present disclosure. FIG. 5 is an exploded schematic diagram of an overhead air duct assembly of a refrigerator in the embodiments of the present disclosure. Referring to FIGS. 1 to 5, the embodiments of the present disclosure provide a refrigerator, and the refrigerator includes a freezing compartment 1 and a freezing compartment door body 2. The freezing compartment door body 2 is used to open or close the freezing compartment 1. The freezing compartment 1 is provided with an overhead air duct assembly 11 and a back air duct assembly 12 therein. The overhead air duct assembly 11 is provided proximate to a top of the freezing compartment 1, and the overhead air duct assembly 11 and a top wall of the freezing compartment 1 have a gap therebetween. The overhead air duct assembly 11 is provided with an evaporator 13 and a fan 14 therein. The overhead air duct assembly 11 is provided with a first overhead air duct air-return inlet 111, a second overhead air duct air-return inlet 112 and an overhead air duct air outlet 113 thereon. The first overhead air duct air-return inlet 111 is disposed at the top of the overhead air duct assembly 11, and the second overhead air duct air-return inlet 112 is disposed at the bottom of the overhead air duct assembly 11. The back air duct assembly 12 is fixed on an inside of a rear wall of the freezing compartment 1. The back air duct assembly 12 is provided with a back air duct air inlet 121 and back air duct air outlet(s) 122 thereon. The first overhead air duct air-return inlet 111 and the second overhead air duct air-return inlet 112 are both communicated with the freezing compartment 1, the overhead air duct air outlet 113 is communicated with the back air duct air inlet 121, and the back air duct air outlet(s) 122 are communicated with the freezing compartment 1.

[0027] The evaporator 13 and the fan 14 of the refrigerator provided in the embodiments of the present disclosure are both disposed in the overhead air duct assembly 11. Therefore, a volume of the back air duct assembly 12 may be reduced, and thus a volume of the refrigerator may increase. There is the gap between the overhead air duct assembly 11 and the top wall of the freezing compartment 1, the top of the overhead air duct assembly 11 is provided with the first overhead air duct air-return inlet 111, and the bottom of the overhead air duct assembly 11 is provided with the second overhead air duct air-return inlet 112. Compared to the prior art in which only the front wall of the overhead air duct assembly is provided with an overhead air duct air-return inlet thereon, the embodiments of the present disclosure may provide a multi-path air-return structure, so that an air-return area of the system may increase, thereby optimizing an air volume circulation of the system. In addition, since the first overhead air duct air-return inlet 111 and the second overhead air duct air-return inlet 112 are respectively located at the top and the bottom of the overhead air duct assembly 11, the user will not directly see the evaporator 13 or an air duct foam after opening an door body of the freezing compartment 1, and thus the refrigerator is more beautiful as a whole.

[0028] Referring to FIG. 3, in some embodiments, the back air duct air outlet 122 is disposed in a left-right direction of the rear wall of the freezing compartment 1, and has a rectangular opening. The number of the back air duct air outlet(s) 122 is related to the number of cavities, of the freezing compartment 1, divided by shelf plates in the freezing compartment 1. Each cavity is provided with at least one back air duct air outlet 122 therein. As a result, the refrigeration effect of each region of the freezing compartment 1 may be rather uniform.

[0029] Referring to FIGS. 3 and 4, when it performs cooling, the fan 14 is turned on, and cold air enters the freezing compartment 1 through a plurality of back air duct air outlets 122. A part of the cold air in the freezing compartment 1 absorbs the heat of the food, and then enters the overhead air duct 114 through the first overhead air duct air-return inlet 111. After being cooled by the evaporator 13, the part of the cold air enters the back air duct 123 from the overhead air duct air outlet 113 through the back air duct air inlet 121, and then enters the freezing compartment 1 through one of the back air duct air outlets 122 to absorb the heat of the food, so as to form the complete circulation.

[0030] Another part of the cold air in the freezing compartment 1 absorbs the heat of the food, and then enters the overhead air duct 114 through the second overhead air duct 144 air-return inlet 112. After being cooled by the evaporator 13, the another part of the cold air enters the back air duct 123 from the overhead air duct air outlet 113 through the back air duct 123 air inlet 121, and then enters the freezing compartment 1 through one of the back air duct air outlets 122 to absorb the heat of the food, so as to form the complete circulation. It will be noted that a solid line arrow in FIG. 3 is a path of the cold air from the freezing compartment 1 to the overhead air duct assembly 11, and a dashed line arrow is a path of the cold air from the back air duct air outlets 122 to the freezing compartment 1. A solid line arrow in FIG. 4 is a path of the cold air before entering evaporator 13, and a dashed line arrow is a path of the cold air after being cooled by evaporator 13.

[0031] Referring to FIG. 3, in some embodiments, there are a plurality of back air duct air outlets 122. Therefore, the embodiments of the present disclosure may implement a rather-multi-path air-return, and a rather large air-return area of the system, so as to optimize the air volume circulation of the system.

[0032] Referring to FIG. 4, in order to enhance the refrigeration effect of the refrigerator, in some embodiments, the first overhead air duct air-return inlet 111 and the second overhead air duct air-return inlet 112 are both disposed proximate to the freezing compartment door body 2, and the overhead air duct air outlet 113 is disposed away from the freezing compartment door body 2. In this way, the large circulation may be formed to enhance the refrigeration effect of the refrigerator. In some other embodiments, the first overhead air duct air-return inlet 111, the second overhead air duct air-return inlet 112 and the overhead air duct air outlet 113 may all be disposed in a middle of the refrigerator in a front-rear direction thereof.

[0033] Referring to FIGS. 2 and 4, in some embodiments, the back air duct assembly 12 includes a back air duct cover plate 124, which is connected to the inside of the rear wall of the freezing compartment 1 in a sealed manner. The back air duct cover plate 124 and the rear wall of the freezing compartment 1 form the rear air duct 123 therebetween. In this way, the back air duct cover plate 124 may be integrated as a whole, which may simplify the fabrication processing and reduce the production cost. In some other embodiments, the back air duct assembly 12 may be spliced by a plurality of plates. In a case where the back air duct assembly 12 is partially damaged, the structure may save the maintenance costs.

[0034] In some embodiments, the back air duct air inlet 121 is formed between a top of the back air duct cover plate 124 and the rear wall of the freezing compartment 1, and the back air duct air outlet 122 is formed on a wall of the back air duct cover plate 124 opposite to the rear wall of the freezing compartment 1.

[0035] FIG. 6 is a schematic diagram showing a three-dimensional structure of the overhead air duct assembly of the refrigerator from a perspective in the embodiments of the present disclosure. FIG. 7 is a schematic diagram showing a three-dimensional structure of the overhead air duct assembly of the refrigerator from another perspective in the embodiments of the present disclosure. Referring to FIGS. 4 to 7, in some embodiments, the overhead air duct assembly 11 includes a first air ductfoam 115, a second air ductfoam 116 and an overhead air duct cover plate 117. The first air duct foam 115 and the overhead air duct cover plate 117 are buckled up and down to form a first installation cavity 118. The second overhead air duct air-return inlet 112 and the overhead air duct air outlet 113 are both disposed in the overhead air duct cover plate 117. A bottom of the overhead air duct cover plate 117 is connected to the top of the back air duct cover plate 124, and a side surface of the overhead air duct cover plate 117 is connected to a side wall of the freezing compartment 1. The fan 14 is disposed at the overhead air duct air outlet 113. Specifically, the fan 14 may be a direct current (DC) fan. The second air duct foam 116 is disposed in the first installation cavity 118. After the overhead air duct cover plate 117 and the first air duct foam 115 are buckled, surfaces where the second air duct foam 116 and the first air duct foam 115 are in contact are matched in a sealed manner, and the overhead air duct 114 is formed between the first air duct foam 115 and the second air duct foam 116. The evaporator 13 is located in the overhead air duct 114. The first air ductfoam 115 is provided therein with the first overhead air duct air-return inlet 111 which is communicated with the overhead air duct 114. In this way, the overhead air duct assembly 11 is an integral member. During installation, the second air duct foam 116 is first laid to the overhead air duct cover plate 117, the fan 14 is connected to the overhead air duct cover plate 117, then the evaporator 13 is placed in the overhead air duct cover plate 117, and finally a front of the first air duct foam 115 is snapped into a sealing surface of the overhead air duct cover plate 117, and the first air duct foam 115 is capped by force to form the overhead air duct assembly 11. In this way, components in the overhead air duct assembly 11 may be assembled first, and then the overhead air duct assembly 11 is installed on the freezing compartment 1, so that installation may be convenient. It will be noted that in some embodiments, the fan 14 is snapped between a mounting base 15 and the fan motor rear cover 16. The mounting base 15 and the overhead air duct cover plate 117 may form a one-piece member, and the fan 14 and the fan motor rear cover 16 may be detachably connected. In this way, during installation, it is only necessary to snap the fan motor rear cover 16 with the mounting base 15, which is very convenient for detaching.

[0036] In order to facilitate detaching, in some embodiments, the overhead air duct cover plate 117 is snapped with the side wall of the freezing compartment 1 through a snapping member 17.

[0037] FIG. 8 is a schematic diagram showing a three-dimensional structure of the overhead air duct cover plate of the refrigerator in the embodiments of the present disclosure. FIG. 9 is a schematic diagram showing a three-dimensional structure of the snapping member in the embodiments of the present disclosure. Specifically, referring to FIGS. 5, 8 and 9, two side surfaces of the overhead air duct cover plate 117 are each provided with a connecting lug 1171, and the connecting lug 1171 is provided with a through hole 1172 therein. The side walls of the freezing compartment 1 are each provided with a pit (not shown in the figures) corresponding to the position of the through hole 1172. The snapping member 17 is a step-type snapping shaft, and a cylindrical surface of a small end of the step-type snapping shaft is provided with an elastic bulge 171 matched with the pit. After the overhead air duct cover plate 117 is installed, the small end of the snapping shaft is snapped with the wall of the pit through the through hole 1172.

[0038] When installing the overhead air duct assembly 11, the overhead air duct assembly 11 is lifted and pushed to a rear of the freezing compartment 1, and then the overhead air duct assembly 11 is preliminarily limited up and down by a rib structure on both sides of an inner tank of the freezing compartment 1, so that the through hole 1172 on the connecting lug 1171 corresponds to the position of the pit on the side wall of the freezing compartment 1. Finally, the small ends of the two snapping members 17 each pass through the through holes 1172 to be snapped with the wall of the pit. When detaching the overhead air duct assembly 11, the overhead air duct assembly 11 is held, and the elastic bulge 171 on the cylindrical surface of the snapping member 17 is pressed to make the snapping member 17 come out of the pit, then the snapping member 17 is taken down, and the overhead air duct assembly 11 is removed. In this way, the installation and disassembly are very convenient.

[0039] In some other embodiments, the overhead air duct cover plate 117 is connected to the side wall of the freezing compartment 1 by bolts, which may make the connection rather reliable.

[0040] FIG. 10 is a schematic diagram showing a connection structure of a connection position of the overhead air duct cover plate and the back air duct cover plate in the refrigerator from a perspective in the embodiments of the present disclosure. Referring to

FIG. 10, in some embodiments, in order to facilitate disassembly and assembly, the top of the back air duct cover plate 124 is provided with a first flanging 125, and the bottom of the overhead air duct cover plate 117 is snapped with the first flanging 125 through a first sealing snapping structure. In some other embodiments, the overhead air duct cover plate 117 and the back air duct cover plate 124 are connected by bolts and sealed by sealing elements, which may make the connection rather reliable.

[0041] FIG. 11 is a schematic diagram showing the connection structure of the connection position of the overhead air duct cover plate and the back air duct cover plate in the refrigerator from another perspective in the embodiments of the present disclosure. FIG. 12 is a schematic diagram 1 showing a local three-dimensional structure of the back air duct cover plate of the refrigerator in the embodiments of the present disclosure. Referring to FIGS. 8, 10, 11 and 12, when using the implementation manner that the bottom of the overhead air duct cover plate 117 is snapped with the first flanging 125 through the first sealing snapping structure is adopted, in some embodiments, the first sealing snapping structure includes an inserting groove 1173 and an inserting section 1251. The inserting groove 1173 is disposed at the bottom of the overhead air duct cover plate 117, and a first side wall 1174 of the inserting groove 1173 is provided with a first snapping groove 1175 therein. The inserting section 1251 is disposed on the first flanging 125, the inserting section 1251 is matched with the inserting groove 1173, and the inserting section 1251 is provided with a first snapping claw 1252 matched with the first snapping groove 1175. After the overhead air duct cover plate 117 and the back air duct cover plate 124 are buckled, the inserting section 1251 is inserted into the inserting groove 1173, the first snapping claw 1252 is snapped into the first snapping groove 1175, and the inserting section 1251 is matched with the first side wall 1174 and the bottom wall of the inserting groove 1173 in a sealed manner. In order to enhance the sealing effect and the aesthetic, the first side wall 1174 of the inserting groove 1173 is disposed proximate to a rear of the overhead air duct cover plate 117.

[0042] When connecting the back air duct cover plate 124 with the overhead air duct assembly 11, it is only necessary to insert the inserting section 1251 on the back air duct cover plate 124 into the inserting groove 1173 at the bottom of the overhead air duct cover plate 117 until the first snapping claw 1252 enters the first snapping groove 1175, so as to achieve reliable sealing and snapping. When detaching the back air duct cover plate 124, the back air duct cover plate 124 is made to moved towards a direction away from the first side wall 1174 of the inserting groove 1173, so as to make the first snapping claw 1252 disengage from the first snapping groove 1175. The structure is prone to disassemble and assemble, and no additional sealing element is required, so that the operation is simple and the cost is low.

[0043] In some embodiments, in order to avoid interference with other components, a length of the first side wall 1174 of the inserting groove 1173 is less than a length of the inserting section 1251, and thefirstside wall 1174 of the inserting groove 1173 corresponds to a middle of the inserting section 1251.

[0044] In some embodiments, since the inserting section 1251 is disposed on the flanging, the inserting section 1251 may have an arc surface. In order to have a good seal with the inserting section 1251, a wall, proximate to the inserting section 1251, of the first side wall 1174 of the inserting groove 1173 is also of an arc surface.

[0045] Referring to FIG. 2, in some embodiments, in order to facilitate disassembly and assembly, the back air duct cover plate 124 is snapped with the rear wall of the freezing compartment 1 through a second sealing snapping structure. In some other embodiments, the back air duct cover plate 124 is connected to the rear wall of the freezing compartment 1 by bolts and sealed by sealing elements, which may make the connection rather reliable.

[0046] FIG. 13 is a schematic diagram 2 showing a local three-dimensional structure of the back air duct cover plate of the refrigerator in the embodiments of the present disclosure. FIG. 14 is a schematic diagram showing a three-dimensional structure of the second snapping groove of the refrigerator in the embodiments of the present disclosure. Referring to FIGS. 2, 12, 13 and 14, when the back air duct cover plate 124 is snapped with the rear wall of the freezing compartment 1 through the second sealing snapping structure, the rear wall of the freezing compartment 1 is recessed towards a foam layer to form a second installation cavity 19. The second sealing snapping structure includes a second flanging 126, two sealing plates 127 and a plurality of second snapping grooves 110. The second flanging 126 is disposed at an outer edge of both the side and the bottom of the back air duct cover plate 124, and the second flanging 126 and the first flanging 125 form a closed loop structure. The two sealing plates 127 are disposed in a vertical direction on a side of the back air duct cover plate 124 proximate to the rear wall of the freezing compartment 1, and are perpendicular to the back air duct cover plate 124. Each sealing plate 127 is provided with a plurality of second snapping claws 1271. The plurality of second snapping grooves 110 are all disposed on the rear wall of the second installation cavity 19, and the second snapping grooves 110 are respectively matched with the second snapping claws 1271. After the back air duct cover plate 124 is buckled on the rear wall of the freezing compartment 1, the plurality of second snapping claws 1271 are each snapped into a respective second snapping groove 110, and are each matched with the side wall of the second snapping groove 110 in a sealed manner. The sealing plates 127 enter the second installation cavity 19 and are respectively matched with the side walls of the second installation cavity 19 in a sealed manner. The two sealing positions form a first sealing structure. A wall of the second flanging 126 away from the inside of the back air duct cover plate 124 (i.e., the wall parallel to the rear wall of the freezing compartment 1) is matched with the rear wall of the freezing compartment 1 in a sealed manner, so as to form a second seal. In this way, two seals may be formed between the back air duct cover plate 124 and the inner tank of the freezing compartment 1. Therefore, the sealing may be rather reliable, and the disassembly and assembly may be rather convenient.

[0047] A width of the overhead air duct cover plate 117 is large, while a width of the back air duct cover plate 124 is generally small. In order to form a natural transition at the connection between the back air duct cover plate 124 and the overhead air duct cover plate 117, and to accommodate other components, referring to FIGS. 2 and 12, in some embodiments, the width of an upper portion of the back air duct cover plate 124 is greater than the width of a lower portion of the back air duct cover plate 124. Since the width of the back air duct air outlet 122 is generally less than a distance between the two sealing plates 127, a channel may be formed between the two sealing plates 127. In order to provide guidance for the cold air to shorten the path, the two sealing plates 127 may each extend to the upper portion of the back air duct cover plate 124 to form an extension section 128. In order to ensure uniform ventilation of the back air duct 123, a top surface of the extension section 128 is lower than a top surface of the back air duct cover plate 124 in the vertical direction.

[0048] FIG. 15 is a schematic diagram showing a connection structure of an upper cover plate and a lower cover plate of a refrigerator in the embodiments of the present disclosure. FIG. 16 is a schematic diagram showing a structure of the upper cover plate and the lower cover plate, that are not connected, of a refrigerator in the embodiments of the present disclosure. Referring to FIGS. 2, 15 and 16, in some embodiments, in order to prevent the back air duct cover plate 124 from deforming, the back air duct cover plate 124 includes an upper cover plate 1241 and a lower cover plate 1242. In order to facilitate disassembly and assembly, the upper cover plate 1241 and the lower cover plate 1242 are snapped through a third sealing snapping structure. In some other embodiments, the back air duct cover plate 124 is a one-piece member. In yet other embodiments, the back air duct cover plate 124 includes the upper cover plate 1241 and the lower cover plate 1242, and the upper cover plate 1241 and the lower cover plate 1242 are connected by bolts and sealed by sealing elements, so as to make the connection rather reliable.

[0049] In a case where the back air duct cover plate 124 includes the upper cover plate 1241 and the lower cover plate 1242, and the upper cover plate 1241 and the lower cover plate 1242 are snapped by the third sealing snapping structure, in some embodiments, the third sealing snapping structure includes a first sealing section 1243 and a second sealing section (not shown in the figures). The first sealing section 1243 is disposed at the lower portion of the upper cover plate 1241, and the first sealing section 1243 is provided with third snapping grooves 1244 thereon. The second sealing section is disposed at the upper portion of the lower cover plate 1242, and the second sealing section is provided thereon with third snapping claws 1245 respectively matching the third snapping grooves 1244. After the upper cover plate 1241 and the lower cover plate 1242 are snapped, the third snapping claw 1245 is snapped into the third snapping groove 1244, and the first sealing section 1243 and the second sealing section overlap and are pressed to seal. In this way, the disassembly and assembly may be convenient.

[0050] Referring to FIGS. 5 and 6, in some embodiments, the overhead air duct assembly 11 is further provided with a water collecting groove (not shown in the figures) therein. The water collecting groove is connected with the evaporator 13, and the overhead air duct cover plate 117 is provided with a drainage port 1176 for discharging the accumulated water in the water collecting groove. In some embodiments, a thickness of a side of the overhead air duct cover plate 117 provided with the drainage port 1176 is less than a thickness of another side thereof. Specifically, in a case where the drainage port 1176 is disposed at a right rear of the overhead air duct cover plate 117, the thickness of the rear portion of the overhead air duct cover plate 117 is less than the thickness of the front portion of the overhead air duct cover plate 117, and the thickness of the right side thereof is less than the thickness of the left side thereof. In this case, the implementation may make the accumulated water in the water collecting groove enter the drainage pipe from the drainage port 1176 smoothly.

[0051] The foregoing descriptions are merely specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Changes or replacements that any person skilled in the art could readily conceive of within the technical scope disclosed by the present disclosure shall be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

What is claimed is:

1. A refrigerator, comprising: a freezing compartment; and a freezing compartment door body used for opening or closing the freezing compartment; characterized in that the freezing compartment is provided therein with: an overhead air duct assembly disposed proximate to a top of the freezing compartment, wherein the overhead air duct assembly and a top wall of the freezing compartment have a gap therebetween; the overhead air duct assembly is provided with an evaporator and a fan therein; and is provided with a first overhead air duct air-return inlet, a second overhead air duct air-return inlet and an overhead air duct air outlet thereon, the first overhead air duct air-return inlet is disposed at a top of the overhead air duct assembly, and the second overhead air duct air-return inlet is disposed at a bottom of the overhead air duct assembly; and a back air duct assembly fixed on an inside of a rear wall of the freezing compartment, and the back air duct assembly being provided with a back air duct air inlet and back air duct air outlet(s), wherein the first overhead air duct air-return inlet and the second overhead air duct air-return inlet are communicated with the freezing compartment, the overhead air duct air outlet is communicated with the back air duct air inlet, and the back air duct air outlet(s) are communicated with the freezing compartment.

2. The refrigerator according to claim 1, characterized in that the first overhead air duct air-return inlet and the second overhead air duct air-return inlet are both disposed proximate to the freezing compartment door body, and the overhead air duct air outlet is disposed away from the freezing compartment door body.

3. The refrigerator according to claim 1, characterized in that the back air duct assembly includes a back air duct cover plate; the back air duct cover plate is connected to the inside of the rear wall of the freezing compartment in a sealing manner, and a rear air duct is provided between the back air duct cover plate and the rear wall of the freezing compartment.

4. The refrigerator according to claim 1, characterized in that, the overhead air duct

assembly includes: a first air duct foam; an overhead air duct cover plate, wherein the first air duct foam and the overhead air duct cover plate are buckled up and down to provide a first installation cavity; the second overhead air duct air-return inlet and the overhead air duct air outlet are both disposed in the overhead air duct cover plate; a bottom of the overhead air duct cover plate is connected with a top of a back air duct cover plate, and a side surface of the overhead air duct cover plate is connected with a side wall of the freezing compartment; the fan is disposed at the overhead air duct air outlet; and a second air duct foam disposed in the first installation cavity, wherein after the overhead air duct cover plate and the first air duct foam are buckled, surfaces where the second air duct foam and the first air duct foam are in contact are matched in a sealed manner, and an overhead air duct is provided between the first air duct foam and the second air duct foam; the evaporator is located in the overhead air duct; and the first air duct foam is provided therein with the first overhead air duct air-return inlet communicated with the overhead air duct.

5. The refrigerator according to claim 3, characterized in that a top of the back air duct cover plate is provided with a first flanging, and a bottom of an overhead air duct cover plate is snapped with the first flanging through a first sealing snapping structure.

6. The refrigerator according to claim 5, characterized in that, the first sealing snapping structure includes: an inserting groove disposed at the bottom of the overhead air duct cover plate, and a first side wall of the inserting groove being provided with a first snapping groove therein; and an inserting section disposed on the first flanging; the inserting section being matched with the inserting groove, and the inserting section being provided with a first snapping claw matched with the first snapping groove, wherein after the overhead air duct cover plate and the back air duct cover plate are buckled, the inserting section is inserted into the inserting groove, the first snapping claw is snapped into the first snapping groove, and the inserting section is matched with the first side wall and a bottom wall of the inserting groove in a sealed manner.

7. The refrigerator according to claim 3, characterized in that the back air duct cover plate is snapped with the rear wall of the freezing compartment through a second sealing snapping structure, and/or an overhead air duct cover plate is snapped with a side wall of the freezing compartment through a snapping member.

8. The refrigerator according to claim 7, characterized in that the rear wall of the freezing compartment is recessed towards a foam layer to provide a second installation cavity, and the second sealing snapping structure includes: a second flanging disposed at an outer edge of both a side and a bottom of the back air duct cover plate; two sealing plates disposed in a vertical direction on a side of the back air duct cover plate proximate to the rear wall of the freezing compartment, and perpendicular to the back air duct cover plate; the sealing plates being each provided with a plurality of second snapping claws; and a plurality of second snapping grooves disposed on a rear wall of the second installation cavity; the second snapping grooves being respectively matched with the second snapping claws, wherein after the back air duct cover plate is buckled on the rear wall of the freezing compartment, the plurality of second snapping claws are each snapped into a respective second snapping groove, and are each matched with a side wall of the second snapping groove in a sealed manner; the sealing plates enter the second installation cavity and are respectively matched with side walls of the second installation cavity in a sealed manner; and a wall of the second flanging away from the inside of the back air duct cover plate is matched with the rear wall of the freezing compartment in a sealed manner; and/or two side surfaces of the overhead air duct cover are each provided with a connecting lug; the connecting lug is provided with a through hole therein, and the side wall of the freezing compartment is provided with a pit corresponding to a position of the through hole; the snapping member is a step-type snapping shaft, and a cylindrical surface of a small end of the step-type snapping shaft is provided with an elastic bulge matched with the pit; after the overhead air duct cover plate is installed, the small end of the snapping shaft is snapped with a wall of the pit through the through hole.

9. The refrigerator according to claim 1, characterized in that the back air duct cover plate includes an upper cover plate and a lower cover plate, and the upper cover plate and the lower cover plate are snapped through a third sealing snapping structure.

10. The refrigerator according to claim 9, characterized in that the third sealing snapping structure includes: a first sealing section disposed at a bottom of the upper cover plate, and being provided with third snapping claws thereon; and a second sealing section disposed at a top of the lower cover plate, and being provided with third snapping grooves respectively matched the third snapping claws, wherein after the upper cover plate and the lower cover plate are snapped, the third snapping claws are respectively snapped into the third snapping grooves, and the first sealing section and the second sealing section overlap and are pressed to seal.