WO2022057257A1

WO2022057257A1 - Refrigerator

Info

Publication number: WO2022057257A1
Application number: PCT/CN2021/089083
Authority: WO
Inventors: 王小倩; 杨明芳
Original assignee: 海信（山东）冰箱有限公司
Priority date: 2020-09-15
Filing date: 2021-04-22
Publication date: 2022-03-24
Also published as: AU2021343048A8; CN114183964A; AU2021343048A1

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

a refrigerator

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application filed with the China Patent Office on September 15, 2020, the application number is 202010968026.0, and the invention name is a refrigerator, the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of refrigeration technology, and in particular, to a refrigerator.

Background technique

At present, the use of refrigeration equipment such as refrigerators and freezers has been popularized, providing many conveniences to people's lives. The air duct circulation component in the freezer of the existing vertical air-cooled refrigerator or freezer includes a fan, an evaporator and a return air structure. Therefore, the thickness of the air duct circulation component is generally thicker, for example, some refrigerators or freezers can reach 0.75m, because the height of vertical air-cooled refrigerators or freezers is generally larger, for example, some refrigerators or freezers It can reach 1.5 meters, and in order to make the cooling effect better, the air duct is generally a large circulation, that is, the size along the height direction of the refrigerator or freezer is as large as possible. The usable volume is smaller.

SUMMARY OF THE INVENTION

Some embodiments of the present application provide a refrigerator, comprising: a freezer compartment; a freezer compartment door for opening or closing the freezer compartment; the freezer compartment is provided with an overhead air duct assembly, and the overhead air duct assembly is close to the freezer compartment. The top is arranged on the top, and there is a gap between the top wall of the freezer. The evaporator and the fan are arranged in the overhead air duct assembly. The overhead air duct assembly is provided with a first overhead air duct return air outlet and a second overhead air A duct return air outlet and an overhead air duct air outlet, wherein the first overhead air duct return air outlet is arranged at the top of the overhead air duct assembly, and the second overhead air duct return air outlet is arranged at the bottom of the overhead air duct assembly; The leeward air duct assembly is fixed on the inner side of the rear wall of the freezer, and the rear air duct assembly is provided with a rear air duct air inlet and a back air duct air outlet; the first overhead air duct return air outlet and the second overhead air outlet The duct return air outlets are all connected with the freezer compartment, the top-mounted air duct air outlet is connected to the rear air duct air inlet, and the rear air duct air outlet is connected to the freezer compartment.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic structural diagram of a refrigerator according to an embodiment of the application (remove the freezer compartment door);

2 is a schematic diagram of an exploded structure of a refrigerator according to an embodiment of the present application;

Fig. 3 is the air passage circulation diagram of the refrigerator from one perspective of the embodiment of the present application;

FIG. 4 is an air duct circulation diagram from another perspective of the refrigerator according to the embodiment of the present application;

5 is an exploded schematic diagram of an overhead air duct assembly in a refrigerator according to an embodiment of the present application;

6 is a perspective structural schematic diagram of an overhead air duct assembly in a refrigerator according to an embodiment of the present application;

7 is a schematic three-dimensional structural diagram of another perspective of the overhead air duct assembly in the refrigerator according to the embodiment of the present application;

8 is a schematic three-dimensional structure diagram of an overhead air duct cover plate in a refrigerator according to an embodiment of the present application;

FIG. 9 is a schematic three-dimensional structure diagram of a clip in an embodiment of the present application;

10 is a schematic diagram of the connection structure from a perspective of the connection between the top-mounted air duct cover and the back air duct cover in the refrigerator according to the embodiment of the application;

11 is a schematic diagram of the connection structure from another perspective of the connection between the top-mounted air duct cover and the back air duct cover in the refrigerator according to the embodiment of the present application;

FIG. 12 is a partial three-dimensional structural schematic diagram 1 of the cover plate of the back air duct in the refrigerator according to the embodiment of the present application;

FIG. 13 is a partial three-dimensional structural schematic diagram 2 of the cover plate of the back air duct in the refrigerator according to the embodiment of the present application;

14 is a schematic three-dimensional structural diagram of the second card slot in the refrigerator according to the embodiment of the present application;

15 is a schematic diagram of the connection structure of the upper cover plate and the lower cover plate in the refrigerator according to the embodiment of the application;

FIG. 16 is a schematic structural diagram of the refrigerator according to the embodiment of the present application when the upper cover plate and the lower cover plate are not connected.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

The terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of this application, unless stated otherwise, "plurality" means two or more.

FIG. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the application; FIG. 2 is a schematic diagram of an exploded structure of a refrigerator according to an embodiment of the application; An air duct circulation diagram from a perspective; FIG. 5 is an exploded schematic diagram of an overhead air duct assembly in a refrigerator according to an embodiment of the present application. 1 to 5 , an embodiment of the present application provides a refrigerator including a freezing compartment 1 and a freezing compartment door 2 , wherein the freezing compartment door 2 is used to open or close the freezing compartment 1 . The freezer compartment 1 is provided with an overhead air duct assembly 11 and a back air duct assembly 12. The overhead air duct assembly 11 is arranged near the top of the freezer compartment 1 and has a gap with the top wall of the freezer compartment 1. The overhead air duct The component 11 is provided with an evaporator 13 and a fan 14, and the overhead air duct assembly 11 is provided with a first overhead air duct return air outlet 111, a second overhead air duct return air outlet 112 and an overhead air duct outlet 113, wherein , the first overhead air duct return air outlet 111 is arranged on the top of the overhead air duct assembly 11, the second overhead air duct return air outlet 112 is arranged at the bottom of the overhead air duct assembly 11; the back air duct assembly 12 is fixed in the freezer compartment 1, the back air duct assembly 12 is provided with a back air duct air inlet 121 and a back air duct air outlet 122; the first overhead air duct return air outlet 111 and the second overhead air duct return air outlet 112 The chamber 1 is connected, the air outlet 113 of the overhead air duct is connected to the air inlet 121 of the rear air duct, and the air outlet 122 of the rear air duct is connected to the freezing chamber 1 .

In the refrigerator provided by the embodiment of the present application, since the evaporator 13 and the fan 14 are both arranged in the overhead air duct assembly 11, the volume of the rear air duct assembly 12 can be reduced, thereby increasing the volume of the refrigerator; There is a gap between the assembly 11 and the top wall of the freezer compartment 1, and the top of the overhead air duct assembly 11 is provided with a first overhead air duct return air outlet 111, and the bottom of the overhead air duct assembly 11 is provided with a second overhead air outlet. The duct return air outlet 112, compared to the prior art where the overhead air duct return air outlet is only provided on the front wall of the overhead air duct assembly, the embodiment of the present application can provide a multi-channel return air structure, increase the return air area of the system, thereby optimizing the The air volume of the system is circulated, and since the first overhead air duct return air outlet 111 and the second overhead air duct return air outlet 112 are located at the top and bottom of the overhead air duct assembly 11, respectively, the user will not directly open the door of the freezer compartment 1. See the evaporator 13 or air duct foam, therefore, the whole refrigerator is more beautiful.

Referring to FIG. 3 , in some embodiments, the rear air duct air outlets 122 are arranged along the left and right directions of the rear wall surface of the freezer compartment 1 to form a rectangular opening, and the number of the rear air duct air outlets 122 is the same as that of the shelf plates in the freezer compartment 1 The number of cavities that divide the freezer compartment 1 is related, and each cavity is provided with at least one air outlet 122 in the back air duct, so that the cooling effect of each area of the freezer compartment 1 can be more uniform.

3 and 4, during cooling, the fan 14 is turned on, and the cold air enters the freezer compartment 1 through the plurality of back air duct air outlets 122, and a part of the cold air in the freezer compartment 1 absorbs the heat of the ingredients and returns to the first overhead air duct. The air outlet 111 enters the overhead air duct 114, and after being cooled by the evaporator 13, the air outlet 113 of the overhead air duct enters the rear air duct 123 through the rear air inlet 121, and then one of the rear air outlet 122 Enter the freezer compartment 1 to absorb the heat of the food, forming a complete cycle.

A part of the cold air in the freezer compartment 1 absorbs the heat of the ingredients and enters the overhead air duct 114 through the return air outlet 112 of the second overhead air duct 114 , and is cooled by the evaporator 13 , and then passes through the back leeward through the air outlet 113 of the overhead air duct. The air inlet 121 of the duct 123 enters the back air duct 123, and then one of the back air duct air outlets 122 enters the freezing chamber 1 to absorb the heat of the food, forming a complete cycle. It should be noted that the solid line arrow in FIG. 3 is the path of the cold air entering the overhead air duct assembly 11 from the freezer compartment 1, and the dashed line arrow is the path of the cold air entering the freezer compartment 1 from the rear air duct outlet 122. The solid line arrow in FIG. 4 is the path of the cool air before entering the evaporator 13 , and the broken line arrow is the path of the cool air after being cooled by the evaporator 13 .

Referring to FIG. 3 , since in some embodiments, there are multiple air outlets 122 in the rear air duct, the embodiment of the present application can realize more return air, and the return air area of the system is larger, so that the air volume of the system can be optimized. cycle.

4 , in order to enhance the refrigeration effect of the refrigerator, in some embodiments, the first overhead air duct return air outlet 111 and the second overhead air duct return air outlet 112 are both disposed close to the freezer compartment door 2, and the overhead air duct exits The tuyere 113 is disposed far away from the freezer compartment door 2, thereby forming a large circulation and enhancing the refrigeration effect of the refrigerator. In other embodiments, the first overhead air duct return air port 111 , the second overhead air duct return air port 112 and the overhead air duct air outlet 113 may all be disposed in the middle of the refrigerator in the front-rear direction.

2 and 4 , in some embodiments, the back air duct assembly 12 includes a back air duct cover plate 124 , and the rear back air duct cover plate 124 is sealingly connected to the inner side of the rear wall of the freezing compartment 1 and is connected to the rear of the freezing compartment 1 . The rear air duct 123 is formed between the walls, whereby the rear air duct cover plate 124 can be integrally formed, which can simplify the processing technology and reduce the production cost. In other embodiments, the back air duct assembly 12 can also be formed by splicing multiple boards, and when the back air duct assembly 12 is partially damaged, this structure can save maintenance costs.

In some embodiments, a back air duct air inlet 121 is formed between the top of the back air duct cover 124 and the rear wall of the freezer compartment 1 , and a rear air duct cover 124 is formed on a wall opposite to the rear wall of the freezer compartment 1 . The leeward air outlet 122 .

6 is a schematic three-dimensional structural diagram of an overhead air duct assembly in a refrigerator according to an embodiment of the application from one perspective; FIG. 7 is a perspective structural schematic diagram of the overhead air duct assembly in a refrigerator according to an embodiment of the application. Referring to FIGS. 4 to 4 7. In some embodiments, the overhead air duct assembly 11 includes a first air duct foam 115, a second air duct foam 116 and an overhead air duct cover 117, wherein the first air duct foam 115 and the overhead air duct The cover plate 117 is buckled up and down to form the first installation cavity 118 , and the second overhead air duct return air port 112 and the overhead air duct outlet 113 are both opened on the overhead air duct cover plate 117 . The bottom is connected to the top of the back air duct cover 124, the side of the overhead air duct cover 117 is connected to the side wall of the freezer compartment 1, and the fan 14 is arranged at the top air duct outlet 113. Specifically, the fan 14 can be a DC fan . The second air duct foam 116 is arranged in the first installation cavity 118. After the top-mounted air duct cover plate 117 is fastened with the first air duct foam 115, the contact surface between the second air duct foam 116 and the first air duct foam 115 is sealed. The above-mentioned overhead air duct 114 is formed between the first air duct foam 115 and the second air duct foam 116, and the evaporator 13 is located in the overhead air duct 114; the first air duct foam 115 is opened with an overhead air duct 114 is connected to the first overhead air duct return air outlet 111 . Therefore, the overhead air duct assembly 11 is an integral piece. When installing, first cover the second air duct foam 116 on the overhead air duct cover 117, then connect the fan 14 to the overhead air duct cover 117, and then Put the evaporator 13 into the overhead air duct cover 117, and finally snap the front of the first air duct foam 115 into the sealing surface of the overhead air duct cover 117, and cover it with force to form the overhead air duct assembly 11 In this way, the components in the overhead air duct assembly 11 can be assembled first, and then the overhead air duct assembly 11 can be installed on the freezer compartment 1, which is more convenient for installation. It should be noted that, in some embodiments, the fan 14 is clamped between the mounting seat 15 and the fan motor rear cover 16, wherein the mounting seat 15 and the overhead air duct cover plate 117 can be formed into one piece, the fan 14 and the fan The motor rear cover 16 is detachably connected, so that during installation, only the fan motor rear cover 16 and the mounting seat 15 are snapped together, and the disassembly is very convenient.

In order to facilitate disassembly, in some embodiments, the top-mounted air duct cover 117 and the side wall of the freezer compartment 1 are snapped together by a snap fitting 17 .

FIG. 8 is a schematic three-dimensional structure diagram of an overhead air duct cover in a refrigerator according to an embodiment of the application; FIG. 9 is a schematic three-dimensional structure diagram of a clip in an embodiment of the application. Specifically, referring to FIGS. 5 , 8 and 9 , both sides of the overhead air duct cover 117 are provided with connecting ears 1171 , the connecting ears 1171 are provided with through holes 1172 , and the side walls of the freezer compartment 1 are provided with connecting ears 1171 . The pit (not shown in the figure) corresponding to the position of the through hole 1172, the clamping member 17 is a stepped clamping shaft, and the cylindrical surface of the small end of the stepped clamping shaft is provided with an elastic protrusion that matches the pit. 171. After the overhead air duct cover plate 117 is installed, the small end of the clamping shaft passes through the opening of the through hole 1172 and is then clamped to the wall surface of the pit.

When installing the overhead air duct assembly 11, first lift the overhead air duct assembly 11 and push it to the rear of the freezer compartment 1, and then use the gallbladder rib structure on both sides of the freezer compartment 1 to initially limit the upper and lower positions to make the connection. The through holes 1172 on the ears 1171 correspond to the positions of the dimples on the side wall of the freezer compartment 1. Finally, the small ends of the two clips 17 are inserted through the through holes 1172 and then clamped to the walls of the dimples. When disassembling the overhead air duct assembly 11, hold the overhead air duct assembly 11 by hand, and press the elastic protrusion 171 on the cylindrical surface of the clip 17, the clip 17 comes out of the pit, remove the clip 17, and move the It is only necessary to remove the overhead air duct assembly 11, so that it is very convenient to install and disassemble.

In other embodiments, the top-mounted air duct cover plate 117 is connected with the side wall of the freezer compartment 1 by bolts, and the connection is more reliable.

FIG. 10 is a schematic diagram of the connection structure from a perspective of the connection between the top-mounted air duct cover and the back air duct cover in the refrigerator according to the embodiment of the present application. Referring to FIG. 10 , in some embodiments, in order to facilitate disassembly and assembly, the top of the back air duct cover 124 is provided with a first flange 125 , and the bottom of the overhead air duct cover 117 and the first flange 125 pass through a first seal Snap-on structure snap-on. In other embodiments, the top-mounted air duct cover plate 117 and the rear air duct cover plate 124 are connected by bolts and sealed by a sealing member, so that the connection is more reliable.

FIG. 11 is a schematic diagram of the connection structure from another perspective of the connection between the top-mounted air duct cover and the back air duct cover in the refrigerator according to the embodiment of the application; FIG. 12 is a partial three-dimensional structural schematic diagram of the back and back air duct cover in the refrigerator according to the embodiment of the application. 1. 8 , 10 , 11 and 12 , when the bottom of the overhead air duct cover 117 is snapped with the first flange 125 through the first sealing snap-fit structure, in some embodiments, The first sealing and clamping structure includes a slot 1173 and a plug-in segment 1251, wherein the slot 1173 is arranged at the bottom of the top-mounted air duct cover 117, and the first side wall 1174 of the slot 1173 is provided with a first slot 1175 , the plug-in segment 1251 is arranged on the first flange 125, the plug-in segment 1251 is matched with the slot 1173, and the plug-in segment 1251 is provided with a first claw 1252 that matches the first card slot 1175. After the air duct cover 117 and the rear air duct cover 124 are fastened together, the insertion section 1251 is inserted into the slot 1173 , the first claw 1252 is locked into the first slot 1175 , and the insertion section 1251 is connected to the slot 1173 . Both the first side wall 1174 and the bottom wall are in sealing engagement. In order to enhance the sealing effect and be more beautiful, the first side wall 1174 of the slot 1173 is disposed near the rear of the overhead air duct cover 117 .

When connecting the rear air duct cover 124 with the overhead air duct assembly 11, only need to insert the plug section 1251 on the rear air duct cover 124 into the slot 1173 at the bottom of the overhead air duct cover 117 until the first card is inserted. The claw 1252 enters the first slot 1175 to achieve reliable sealing and clamping. When removing the back air duct cover 124, move the back air duct cover 124 away from the first side wall 1174 of the slot 1173. The first clamping claw 1252 only needs to be released from the first clamping groove 1175. The structure is easy to assemble and disassemble, and no additional sealing member is required. The operation is simple and the cost is low.

In some embodiments, in order to avoid interference with other components, the length of the first side wall 1174 of the slot 1173 is smaller than the length of the plug-in segment 1251 , and the first side wall 1174 of the slot 1173 corresponds to the middle of the plug-in segment 1251 .

In some embodiments, since the plug-in segment 1251 is disposed on the flange, the plug-in segment 1251 will have an arc surface. For better sealing with the plug-in segment 1251 , the first side wall 1174 of the slot 1173 is close to The wall surface of the plug-in segment 1251 is also an arc surface.

Referring to FIG. 2 , in some embodiments, in order to facilitate disassembly and assembly, the rear air duct cover 124 and the rear wall surface of the freezer compartment 1 are snapped together through a second sealing clamping structure. In other embodiments, the rear duct cover 124 124 is connected with the rear wall surface of the freezer compartment 1 by bolts, and is sealed by a seal, so that the connection is more reliable.

FIG. 13 is a schematic perspective view 2 of a partial three-dimensional structure of a cover plate of a back duct in a refrigerator according to an embodiment of the present application; FIG. 14 is a schematic perspective view of the three-dimensional structure of a second card slot in the refrigerator according to an embodiment of the present application. 2, 12, 13 and 14, when adopting the embodiment in which the back air duct cover 124 and the rear wall surface of the freezer compartment 1 are snapped together through the second sealing snap-fit structure, the rear wall of the freezer compartment 1 faces toward the hair. The direction of the bubble layer is concave to form a second installation cavity 19, and the second sealing and clamping structure includes a second flange 126, two sealing plates 127 and a plurality of second clamping grooves 110, wherein the second flange 126 is arranged in the back leeward The side and bottom outer edges of the duct cover 124 form a closed-loop structure with the first flange 125, and the two sealing plates 127 are vertically arranged on the side of the rear duct cover 124 close to the rear wall of the freezer compartment 1, And perpendicular to the back air duct cover plate 124, each sealing plate 127 is provided with a plurality of second claws 1271; a plurality of second clamping grooves 110 are arranged on the rear wall surface of the second installation cavity 19, the second clamping The grooves 110 are matched with the second claws 1271; after the rear air duct cover 124 is fastened on the rear wall surface of the freezer compartment 1, the plurality of second claws 1271 are respectively clamped into the corresponding second claws 110, and are connected with each other. The side wall surface of the second slot 110 is sealed and matched, and the sealing plate 127 enters the second installation cavity 19 and is sealingly matched with the side wall surface of the second installation cavity 19. The two seals form the first sealing structure; the second flange The wall surface 126 away from the inner side of the back duct cover 124 , that is, the wall surface parallel to the rear wall surface of the freezer compartment 1, is in sealing cooperation with the rear wall surface of the freezer compartment 1, and a second seal is formed here. As a result, two seals can be formed between the back air duct cover 124 and the inner container of the freezer compartment 1 , the reliability of the seal is better, and the disassembly and assembly are more convenient.

Since the width of the overhead air duct cover 117 is relatively large, and the width of the rear air duct cover 124 is generally smaller, in order to make the transition between the top air duct cover 117 more natural and to accommodate

other components

2 and 12, in some embodiments, the width of the upper part of the back air duct cover plate 124 is greater than the width of the lower part, because the width of the back air duct outlet 122 is generally smaller than the distance between the two sealing plates 127, so , a channel can be formed between the two sealing plates 127, in order to provide guidance for the cold air, thereby shortening the distance, the two sealing plates 127 can extend to the upper area of the rear leeway cover plate 124 to form an extension section 128, in order to enable the entire rear The leeward duct 123 is evenly ventilated, and in the vertical direction, the top surface of the extending section 128 is lower than the top surface of the rear leeward duct cover plate 124 .

FIG. 15 is a schematic diagram of the connection structure of the upper cover plate and the lower cover plate in the refrigerator according to the embodiment of the application; FIG. 16 is a schematic diagram of the structure when the upper cover plate and the lower cover plate in the refrigerator according to the embodiment of the application are not connected. 2, 15 and 16, in some embodiments, in order to prevent deformation of the back air duct cover 124, the back air duct cover 124 includes an upper cover 1241 and a lower cover 1242. In order to facilitate disassembly and assembly, the upper cover The plate 1241 and the lower cover plate 1242 are clamped by the third sealing clamping structure. In other embodiments, the rear duct cover 124 is an integral piece. In other embodiments, the rear air duct cover 124 includes an upper cover 1241 and a lower cover 1242, and the upper cover 1241 and the lower cover 1242 are connected by bolts and sealed by seals, so the connection is more reliable.

When the back air duct cover 124 includes an upper cover 1241 and a lower cover 1242, and the upper cover 1241 and the lower cover 1242 are snapped together by the third sealing and snapping structure, in some embodiments, the third sealing snapping The structure includes a first sealing section 1243 and a second sealing section (not shown in the figure), wherein the first sealing section 1243 is arranged at the lower part of the upper cover plate 1241, and the first sealing section 1243 is provided with a third slot 1244, The second sealing section is arranged on the upper part of the lower cover 1242, and the second sealing section is provided with a third clamping claw 1245 that matches the third clamping groove 1244; after the upper cover 1241 and the lower cover 1242 are buckled, the third clamping claw 1245 is snapped into the third snap groove 1244, and the first sealing segment 1243 and the second sealing segment overlap and are pressed and sealed. Thus, disassembly and assembly are more convenient.

5 and 6 , in some embodiments, the overhead air duct assembly 11 is further provided with a water collection tank (not shown in the figure), the water collection tank is connected to the evaporator 13 , and the overhead air duct cover 117 is provided with There is a drain port 1176 for draining the accumulated water in the sump. In some embodiments, the thickness of one side of the top-mounted air duct cover plate 117 where the water outlet 1176 is disposed is smaller than the thickness of the other side. Specifically, when the water outlet 1176 is arranged at the right rear of the overhead air duct cover 117, the thickness of the rear of the overhead air duct cover 117 is smaller than that of the front, and the thickness of the right side is smaller than the thickness of the left side. In this embodiment, the accumulated water in the water collecting tank can be more smoothly entered into the drain pipe through the drain port 1176 .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or replacements, which should cover within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A refrigerator, comprising:

Freezer;

A freezing chamber door, used to open or close the freezing chamber; it is characterized in that, the freezing chamber is provided with:

An overhead air duct assembly, the overhead air duct assembly is disposed close to the top of the freezer compartment, and there is a gap between it and the top wall of the freezer compartment, and an evaporator and a fan are arranged in the overhead air duct assembly , the overhead air duct assembly is provided with a first overhead air duct return air outlet, a second overhead air duct return air outlet and an overhead air duct outlet, wherein the first overhead air duct return air outlet is provided at the top of the overhead air duct assembly, the second overhead air duct return air outlet is arranged at the bottom of the overhead air duct assembly;

a back air duct assembly, the back air duct assembly is fixed on the inner side of the rear wall of the freezer, and the back air duct assembly is provided with a back air duct air inlet and a back air duct air outlet;

The first overhead air duct return air outlet and the second overhead air duct return air outlet are both communicated with the freezer compartment, and the overhead air duct outlet is communicated with the back air duct air inlet, and the back air duct The air outlet communicates with the freezing chamber.
The refrigerator according to claim 1, wherein the first overhead air duct return air outlet and the second overhead air duct return air outlet are both disposed close to the freezer compartment door, and the overhead air duct The air outlet is arranged away from the freezing compartment door.
The refrigerator according to claim 1, wherein the back air duct assembly comprises a back air duct cover, the back air duct cover is sealingly connected to the inner side of the rear wall of the freezing compartment, and is connected with the freezer A rear air duct is formed between the rear walls of the chamber.
The refrigerator according to claim 1, wherein the overhead air duct assembly comprises:

first air duct foam;

an overhead air duct cover plate, the first air duct foam is buckled up and down with the overhead air duct cover plate to form a first installation cavity; the second overhead air duct return air outlet and the overhead air duct outlet The air outlets are all opened on the overhead air duct cover, the bottom of the overhead air duct cover is connected to the top of the back air duct cover, and the side of the overhead air duct cover is connected to the freezer compartment the side wall; the fan is arranged at the air outlet of the overhead air duct;

The second air duct foam is arranged in the first installation cavity. After the overhead air duct cover plate is fastened with the first air duct foam, the second air duct foam and the first air duct The contact surfaces of the foams are sealed and matched, and an overhead air duct is formed between the first air duct foam and the second air duct foam, and the evaporator is located in the overhead air duct; the first air duct foam The first overhead air duct return air outlet communicated with the overhead air duct is opened on the top.
The refrigerator according to claim 3, wherein the top of the back air duct cover is provided with a first flange, and the bottom of the overhead air duct cover and the first flange are sealed by a first seal Snap-on structure snap-on.
The refrigerator according to claim 5, wherein the first sealing and clamping structure comprises:

a slot, which is arranged at the bottom of the top-mounted air duct cover, and a first card slot is provided on the first side wall of the slot;

a plug-in segment, arranged on the first flange, the plug-in segment is matched with the slot, and the plug-in segment is provided with a first claw matched with the first card slot;

After the top-mounted air duct cover and the back air duct cover are fastened together, the insertion section is inserted into the slot, the first clamping claw is clamped into the first slot, and the The plug-in segment is in sealing fit with the first side wall and the bottom wall of the slot.
The refrigerator according to claim 3, characterized in that, the back air duct cover plate and the rear wall surface of the freezer compartment are snap-connected through a second sealing and snap-connecting structure, and/or the top-mounted air duct cover plate is connected to the back wall of the freezer compartment. The side wall of the freezing chamber is clamped by a clamp.
The refrigerator according to claim 7, wherein the rear wall of the freezing chamber is recessed in the direction of the foam layer to form a second installation cavity, and the second sealing and clamping structure comprises:

a second flanging, the second flanging is arranged on the side part and the outer edge of the bottom of the back air duct cover;

Two sealing plates are vertically arranged on the side of the back air channel cover plate close to the rear wall of the freezer compartment, and are perpendicular to the back air channel cover plate, and the sealing plate is provided with a plurality of the second jaw;

A plurality of second clamping slots are arranged on the rear wall surface of the second installation cavity, and the second clamping slots are matched with the second clamping claws; the rear air duct cover plate is fastened to the freezer compartment After the rear wall surface of the second clamping claws, a plurality of the second clamping claws are respectively clamped into the corresponding second clamping grooves, and are sealingly matched with the side wall surfaces of the second clamping grooves, and the sealing plate enters the second clamping groove. in the installation cavity, and sealingly cooperate with the side wall surface of the second installation cavity; and the wall surface of the second flange away from the inner side of the back air duct cover plate is in sealing cooperation with the rear wall surface of the freezer compartment; and/or ,

Both sides of the overhead air duct cover plate are provided with connecting ears, the connecting ears are provided with through holes, and the side walls of the freezing chamber are provided with pits corresponding to the positions of the through holes , the clamping part is a stepped clamping shaft, and the cylindrical surface of the small end of the stepped clamping shaft is provided with an elastic protrusion that matches the pit, and after the top air duct cover is installed, it is clamped. The small end of the piece is clamped with the wall surface of the recess after passing through the through hole.
The refrigerator according to claim 1, wherein the back air duct cover plate comprises an upper cover plate and a lower cover plate, and the upper cover plate and the lower cover plate are clamped by a third sealing clamping structure.
The refrigerator according to claim 9, wherein the third sealing and clamping structure comprises:

a first sealing section, arranged at the bottom of the upper cover plate, and a third clamping claw is arranged on the first sealing section;

The second sealing section is arranged on the top of the lower cover plate, and the second sealing section is provided with a third clamping groove matching with the third clamping claw;

After the upper cover plate and the lower cover plate are fastened together, the third clamping claw is clamped into the third clamping groove, and the first sealing section and the second sealing section overlap and are pressed and sealed. .