CN118532863A - Air duct assembly and refrigerator - Google Patents

Abstract

It can be seen from the above technical scheme that the present application provides a duct assembly and a refrigerator, the duct assembly comprising: a first duct assembly is divided into a first chamber and a second chamber which are not connected to each other by a partition; the first chamber comprises a first air inlet and a plurality of first air outlets; the second chamber comprises a second air inlet, an electric damper and a plurality of second air outlets; the second air inlet is arranged at one end of the second chamber; a plurality of guide plates are arranged in the second chamber, and the guide plates divide the second chamber into a plurality of independent air outlet ducts; a second air outlet is arranged in the air outlet duct, and the number of the air outlet ducts is the same as the number of the second air outlets; when the electric damper is closed, any two second air outlets are not connected to each other. When the cold storage room does not need refrigeration, the electric damper is closed, the second air outlets are not connected to each other, and no gas flow is generated between the cold storage room and the second chamber, so as to solve the problem of cold air convection of the duct assembly when the duct assembly is arranged between the freezer and the cold storage room.

Description

Air duct components and refrigerator

Technical Field

The present application relates to the technical field of refrigerators, and in particular to an air duct assembly and a refrigerator.

Background Art

Air-cooled refrigerators achieve refrigeration or freezing functions through built-in evaporators and fans. However, since the evaporator, air duct, etc. are arranged at the back of the cabinet, the evaporator and air duct occupy the volume in the depth direction of the cabinet, resulting in a smaller storage room depth.

Since the evaporator and air duct at the back of the refrigerator occupy a large space in the depth direction of the box, the depth of the refrigerator is shallower, which seriously affects the volume of the refrigerator. In order to solve this problem, the evaporator and air duct components can be arranged in the middle partition between the freezer and the refrigerator, so that the refrigerator air duct is close to the freezer to obtain a larger volume.

Although the evaporator and air duct components are arranged in the middle partition between the freezer and the refrigerator, the depth of the refrigerator can be saved, but there are also some problems. First, in order to ensure the best refrigeration effect, the refrigeration duct is generally provided with multiple air outlets, and the air outlets are generally connected, and the other end of the air outlet is connected to the refrigerator. When the refrigerator is not refrigerated in a low temperature environment, the refrigeration duct is close to the freezer and the internal temperature is very low, while the temperature at the top of the refrigerator is relatively high, resulting in natural convection between the refrigerator and the duct. That is, the high-temperature airflow at the top of the refrigerator flows into the top air outlet of the refrigeration duct, and the cold air in the refrigeration duct flows into the refrigerator through the lower air outlet. Natural convection will cause the refrigerator to continue to refrigerate when it reaches the preset temperature, causing the temperature in the refrigerator to be too cold and the food to be frozen; at the same time, due to the high humidity in the refrigerator, the air flowing from the refrigerator into the refrigeration duct will condense and frost when it encounters cold, affecting the refrigeration effect.

Summary of the invention

The present application provides an air duct assembly and a refrigerator to solve the problem of cold air convection of the air duct assembly when the air duct assembly is arranged between a freezing chamber and a refrigerating chamber.

In the first aspect, the present application provides an air duct assembly, which is applied to a refrigerator, and the refrigerator includes a freezer and a refrigerator, including: a first air duct assembly; the first air duct assembly is divided into a first chamber and a second chamber that are not connected to each other by a partition; the first chamber includes a first air inlet and a plurality of first air outlets; the first air inlet is arranged at one end of the first chamber; the first air outlet is arranged equidistantly along the height direction; the second chamber includes a second air inlet, an electric damper and a plurality of second air outlets; the electric damper is connected to the second air inlet; the second air inlet is arranged at one end of the second chamber; a plurality of guide plates are arranged in the second chamber, and the guide plates divide the second chamber into a plurality of independent air outlet ducts; the air outlet duct is arranged in the second air outlet duct, and the number of the air outlet ducts is the same as the number of the second air outlets; when the electric damper is closed, any two of the second air outlets are not connected to each other. The first chamber is connected to the freezer through the first air outlet; the second chamber is connected to the refrigerator through the second air outlet.

Optionally, the guide plate includes a first guide plate and a second guide plate, one end of the first guide plate is connected to a side of the second chamber away from the partition, one end of the first guide plate is connected to the second guide plate, and the first guide plate is arranged parallel to a horizontal plane; one end of the second guide plate away from the first guide plate is connected to the second air inlet.

Optionally, the width of one end of the air outlet duct close to the second air inlet is proportional to the height of the second air outlet in the air outlet duct.

Optionally, the area of the second air outlet is proportional to the height of the second air outlet.

Optionally, a refrigeration cavity recessed outward is provided on one side of the freezer compartment close to the refrigeration compartment, and the refrigeration cavity is provided with an evaporator, a defrost heater, a first refrigeration air outlet and a second refrigeration air outlet; the evaporator is connected to the defrost heater; the first refrigeration air outlet is connected to the first air inlet, and the second refrigeration air outlet is connected to the second air inlet.

Optionally, it also includes a second air duct assembly, which includes a side panel, an air duct cover and a fan; the side panel, the fan and the air duct cover are connected in sequence, and the air duct cover is snapped on the fan to form a first air supply port and a second air supply port, the first air supply port is connected to the first cooling air outlet, and the second air supply port is connected to the second cooling air outlet.

Optionally, the freezer chamber includes a refrigeration return air inlet, and the freezer chamber is connected to the refrigeration cavity through the refrigeration return air inlet; the second air duct assembly includes a freezer chamber return air inlet, and the freezer chamber return air inlet is arranged on a side of the freezer chamber close to the refrigeration chamber; the refrigeration chamber also includes a refrigeration chamber return air inlet, and the refrigeration chamber return air inlet is arranged on a side of the refrigeration chamber close to the freezer chamber; the refrigeration chamber is connected to the refrigeration cavity through the refrigeration chamber return air inlet and the freezer chamber return air inlet.

Optionally, a heat-insulating component is further included, and one side of the first air duct assembly is connected to the freezing chamber through the heat-insulating component, and the other side of the first air duct assembly is connected to the refrigerating chamber through the heat-insulating component.

In a second aspect, the present application provides a refrigerator, comprising: the air duct assembly and a housing as described in the first aspect above, the housing comprising a freezer compartment and a refrigerator compartment; the freezer compartment and the refrigerator compartment are symmetrically arranged along the vertical direction; the air duct assembly comprises a second air duct assembly and a first air duct assembly; the freezer compartment is connected to the second air duct assembly; the first air duct assembly is arranged between the freezer compartment and the refrigerator compartment.

It can be seen from the above technical scheme that the present application provides an air duct assembly and a refrigerator, wherein the air duct assembly comprises: a first air duct assembly; the first air duct assembly is divided into a first chamber and a second chamber that are not connected to each other by a partition; the first chamber comprises a first air inlet and a plurality of first air outlets; the first air inlet is arranged at one end of the first chamber; the first air outlet is arranged equidistantly along the height direction; the second chamber comprises a second air inlet, an electric damper and a plurality of second air outlets; the electric damper is connected to the second air inlet; the second air inlet is arranged at one end of the second chamber; a plurality of guide plates are arranged in the second chamber, and the guide plates divide the second chamber into a plurality of independent air outlet ducts; the air outlet ducts are arranged in the second air outlets, and the number of the air outlet ducts is the same as the number of the second air outlets; when the electric damper is closed, any two of the second air outlets are not connected to each other. When the refrigerator compartment does not need refrigeration, the electric damper is closed, the second air outlets are not connected to each other, and no convection occurs between the refrigerator compartment and the second chamber, so as to solve the problem of cold air convection of the air duct assembly when the air duct assembly is arranged between the freezer compartment and the refrigerator compartment.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

FIG1 is a schematic diagram of the structure of a first air duct assembly provided in an embodiment of the present application;

FIG2 is a cross-sectional view of a first air duct assembly provided in an embodiment of the present application;

FIG3 is a schematic diagram of the assembly of a first air duct assembly provided in an embodiment of the present application;

FIG4 is a schematic diagram of the assembly of the second air duct assembly and the refrigeration cavity provided in an embodiment of the present application;

FIG5 is a schematic diagram of a refrigerator provided in an embodiment of the present application;

FIG. 6 is a schematic diagram of the structure of the cold storage chamber provided in an embodiment of the present application.

Reference numerals:

Among them, 1-freezer; 112-refrigeration cavity; 113-first refrigeration air outlet; 114-second refrigeration air outlet; 115-freezer return air outlet; 2-refrigeration chamber; 212-refrigeration chamber return air outlet; 3-second air duct assembly; 31-side panel; 311-refrigeration return air outlet; 32-air duct cover; 33-fan; 4-evaporator; 41-defrost heater; 411-first air supply outlet; 412-second air supply outlet; 5-first air duct assembly; 51-first chamber; 52-second chamber; 53-electric damper; 54-insulation component; 55-air outlet duct; 511-first air inlet; 512-first air outlet; 513-partition; 521-second air inlet; 522-second air outlet; 523-guide plate; 5231-first guide plate; 5232-second guide plate.

DETAILED DESCRIPTION

The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

In a double-door refrigerator, the evaporator 4 and the air duct assembly are arranged in the middle partition between the freezer and the refrigerator. A plurality of air outlets are arranged in the refrigerator duct, and the air outlets are connected. The air outlets connect the refrigerator and the refrigerator duct. In a low-temperature environment, the refrigerator does not cool. Since the refrigerator duct is close to the freezer, the temperature inside the refrigerator duct is relatively low, and the temperature of the refrigerator top plate is relatively high, resulting in natural convection between the refrigerator and the refrigerator duct, that is, the high-temperature airflow at the top of the refrigerator flows through the air outlet on the top of the refrigerator duct, and the cold air in the refrigerator duct flows into the refrigerator through the air outlet below. Natural convection will cause the refrigerator to continue to cool when the preset temperature is reached, so that the temperature in the refrigerator is too low to freeze the food, and the humidity in the refrigerator is relatively high. When the air flows from the refrigerator into the refrigerator duct, it will condense and form frost when it encounters cold.

In order to solve the problem of cold air convection of the air duct assembly when the air duct assembly is arranged between the freezing chamber and the refrigerating chamber 2, referring to FIG. 1 to FIG. 4, an embodiment of the present application provides an air duct assembly, which is applied to a refrigerator. The refrigerator includes a freezing chamber 1 and a refrigerating chamber 2. The air duct assembly includes:

The first air duct assembly 5; the first air duct assembly 5 is divided into a first chamber 51 and a second chamber 52 which are not connected to each other by a partition 513; wherein, the first air duct assembly 5 is divided into a first chamber 51 and a second chamber 52 by the partition 513, which can effectively prevent the air between the first chamber 51 and the second chamber 52 from mixing, thereby ensuring that the temperature of each chamber is independently controlled.

The first chamber 51 includes a first air inlet 511 and a plurality of first air outlets 512; the first air inlet 511 is arranged at one end of the first chamber 51; the first air outlets 512 are equidistantly arranged along the height direction; the first chamber 51 is connected to the freezer chamber 1 through the first air outlets 512; wherein, the first air inlet 511 can introduce external cold air into the first chamber 51, and then discharge the cold air into the freezer chamber 1 through the first air outlets 512, so that the cold air is evenly distributed in the freezer chamber 1, so that the temperature in the freezer chamber 1 is balanced, and the occurrence of local overcooling or overheating is reduced.

The second chamber 52 includes a second air inlet 521, an electric damper 53 and a plurality of second air outlets 522; the electric damper 53 is connected to the second air inlet 521; the second air inlet 521 is arranged at one end of the second chamber 52; a plurality of guide plates 523 are arranged in the second chamber 52, and the guide plates 523 divide the second chamber 52 into a plurality of independent air outlet ducts 55; second air outlets 522 are arranged in the air outlet duct 55, and the number of the air outlet ducts 55 is the same as the number of the second air outlets 522; when the electric damper 53 is closed, any two second air outlets 522 are not connected to each other; the second chamber 52 is connected to the refrigerating chamber 2 through the second air outlet 522.

When the refrigerating chamber 2 needs to be cooled, the electric damper 53 opens, and the external cold air enters the second chamber 52 through the second air inlet 521. Since the second chamber 52 is provided with a guide plate 523, the guide plate 523 divides the second chamber 52 into a plurality of independent air outlet ducts 55. The cold air flows through the air outlet duct 55 to the second air outlet 522 in the air outlet duct 55, and then is discharged into the refrigerating chamber 2 through the second air outlet 522. When the refrigerating chamber 2 reaches the preset temperature and the refrigerating chamber 2 does not need to be cooled, the electric damper 53 is closed. Since the second air outlets 522 are all arranged in the air outlet duct 55, the second air outlets 522 are not connected to each other, and the gas in the refrigerating chamber 2 will not enter the second chamber 52 from the refrigerating chamber 2 through the second air outlet 522, so as to solve the convection problem generated between the first air duct assembly 5 and the refrigerating chamber 2.

In some embodiments, as shown in FIG. 2 , the guide plate 523 includes a first guide plate 5231 and a second guide plate 5232. One end of the first guide plate 5231 is connected to a side of the second chamber 52 away from the partition 513, and one end of the first guide plate 5231 is connected to the second guide plate 5232. The first guide plate 5231 is arranged parallel to the horizontal plane; one end of the second guide plate 5232 away from the first guide plate 5231 is connected to the second air inlet 521. Among them, one end of the second guide plate 5232 is connected to the second air inlet 521. When the second air inlet 521 introduces cold air, the air outlet duct 55 formed by the second guide plate 5232 and the side wall of the second chamber 52 or the second guide plate 5232 and the second guide plate 5232 or the second guide plate 5232 and the partition 513 can guide the flow of cold air, so that the cold air can flow into the second air outlet 522 more smoothly, thereby improving the refrigeration efficiency of the cold storage chamber 2.

In some embodiments, referring to FIG. 2 again, the area of the second air outlet 522 is proportional to the height of the second air outlet 522. Among them, due to the heavy weight of the cold air, the cold air entering the refrigerating chamber 2 through the second air inlet 521 will settle downward. In order to ensure that there is enough cold air at the top of the refrigerating chamber 2, the area of the second air outlet 522 needs to increase as the height of the second air outlet 522 increases. When the height of the second air outlet 522 is higher, the area of the second air outlet 522 is also larger, so that the top of the refrigerating chamber 2 can obtain more cold air. When the cold air at the top of the refrigerating chamber 2 flows downward, the temperature in the refrigerating chamber 2 decreases, which helps to improve the uniformity of temperature distribution in the refrigerating chamber 2, thereby improving the refrigeration effect.

In some embodiments, the width of the end of the air outlet duct 55 close to the second air inlet 521 is proportional to the height of the second air outlet 522 in the air outlet duct 55 .

Among them, since the area of the second air outlet 522 is related to the height of the second air outlet 522, when the area of the second air outlet 522 is larger, the air intake of the air outlet duct 55 where the second air outlet 522 is located is larger. Therefore, it is assumed that the width of the end of the air outlet duct 55 close to the second air inlet 521 is related to the area of the second air outlet 522. When the area of the second air outlet 522 is larger, the width of the end of the air outlet duct 55 close to the second air inlet 521 is larger. By adjusting the width of the air outlet duct 55 to adapt to different air outlet sizes, it can be ensured that no matter how the size of the air outlet changes, the air volume entering the air outlet duct 55 can be guaranteed, thereby achieving more efficient air circulation and temperature control.

In some embodiments, as shown in FIG. 4 , a refrigeration cavity 112 is provided on the side of the freezer compartment 1 close to the refrigerator compartment 2, and the refrigeration cavity 112 is provided with an evaporator 4, a defrost heater 41, a first refrigeration air outlet, and a second refrigeration air outlet; the evaporator 4 is connected to the defrost heater 41; the defrost heater 41 can provide heat to defrost the evaporator 4 when frost condenses on the surface of the evaporator 4. The first refrigeration air outlet is connected to the first air inlet 511, and the second refrigeration air outlet is connected to the second air inlet 521. The refrigeration cavity 112 is a groove formed by the side of the freezer compartment 1 close to the refrigerator compartment 2. The evaporator 4 is provided in the refrigeration cavity 112. The cold air generated by the evaporator 4 when working is transported to the first air duct, and the cold air is transported to the refrigerator compartment 2 and/or the freezer compartment 1 through the first air duct assembly 5 to reduce the temperature of the refrigerator compartment 2 and/or the freezer compartment 1. At the same time, the evaporator 4 is arranged between the refrigerating chamber 2 and the freezing chamber 1, so as to reduce the volume of the rear wall of the refrigerator occupied by the evaporator 4 and improve the utilization rate of the refrigerator.

In some embodiments, as shown in FIG. 3 and FIG. 4, a second air duct assembly 3 is also included, and the second air duct assembly 3 includes a side plate 31, an air duct cover 32 and a fan 33; the side plate 31, the fan 33 and the air duct cover 32 are connected in sequence, and the air duct cover 32 is buckled on the fan 33 to form a first air supply port 411 and a second air supply port 412, the first air supply port 411 is connected to the first refrigeration air outlet, and the second air supply port 412 is connected to the second refrigeration air outlet. Among them, the side plate 31 is a supporting structure of the second air duct assembly 3, which improves the strength and stability of the second air duct assembly 3. In addition, the side plate 31 can also cover the refrigeration cavity 112 to isolate the contact between the evaporator 4 and the freezer 1. The side plate 31 connects the air duct cover 32 and the fan 33 to form a sealed channel for guiding air flow. The air duct cover 32 is connected to the side plate 31 and buckled on the fan 33 to form a closed space. The air duct cover 32 is provided with a first air supply port 411 and a second air supply port 412, which guide the airflow blown out by the fan 33 to a specific path so as to deliver the cold generated by the evaporator 4 to the first air duct assembly 5. The fan 33 is responsible for promoting the air flow, and the fan 33 is installed on the side plate 31 and covered by the air duct cover 32. When working, the fan 33 generates airflow and blows out the cold air through the first air supply port 411 and the second air supply port 412.

In some embodiments, as shown in FIG. 3 , FIG. 4 and FIG. 6 , the freezer chamber 1 includes a refrigeration return air port 311, and the freezer chamber 1 is connected to the refrigeration cavity 112 through the refrigeration return air port 311; the second air duct assembly 3 includes a freezer chamber return air port 115, and the freezer chamber return air port 115 is arranged on a side of the freezer chamber 1 close to the refrigeration chamber 2; the refrigeration chamber 2 also includes a refrigeration chamber return air port 212, and the refrigeration chamber return air port 212 is arranged on a side of the refrigeration chamber 2 close to the freezer chamber 1; the refrigeration chamber 2 is connected to the refrigeration cavity 112 through the refrigeration chamber return air port 212 and the freezer chamber return air port 115. Among them, the refrigeration return air port 311 is arranged at the lower end of the side plate 31, and the gas in the freezer chamber 1 can enter the refrigeration cavity 112 through the refrigeration return air port 311, so that the gas entering the refrigeration cavity 112 again is reabsorbed by the evaporator 4.

In addition, the gas in the cold storage room 2 can enter the refrigeration cavity 112 through the cold storage room return air outlet 212 and the freezer room return air outlet 115 in turn, and the evaporator 4 reabsorbs heat, so that the gas is cooled again, maintaining the stability of the cold storage room 2 and/or the freezer room 1 within the set range.

In some embodiments, a heat preservation member 54 is further included, and one side of the first air duct assembly 5 is connected to the freezing chamber 1 through the heat preservation member 54, and the other side of the first air duct assembly 5 is connected to the refrigerating chamber 2 through the heat preservation member 54. Both sides of the first air duct assembly 5 are connected to the refrigerating chamber 2 and the freezing chamber 1 through the heat preservation member 54, which can isolate the external heat on the one hand and prevent the cold air in the first air duct assembly 5 from leaking out, and on the other hand, can improve the energy efficiency ratio of the refrigerating chamber 2 and the freezing chamber 1, and by effectively isolating the heat exchange between the inside and outside of the first assembly, the heat preservation member 54 helps maintain the temperature of the cold air in the first air duct assembly 5, thereby reducing energy consumption.

In some embodiments, as shown in FIG5 , the present application further provides a refrigerator, comprising the air duct assembly and the box body provided in the above embodiments. The box body comprises a freezing chamber 1 and a refrigerating chamber 2; the freezing chamber 1 and the refrigerating chamber 2 are symmetrically arranged in the vertical direction; the air duct assembly comprises a second air duct assembly 3 and a first air duct assembly 5; the freezing chamber 1 is connected to the second air duct assembly 3; the first air duct assembly 5 is arranged between the freezing chamber 1 and the refrigerating chamber 2. Among them, the freezing chamber 1 and the refrigerating chamber 2 are symmetrically arranged in the vertical direction, and the two chamber bodies are distributed up and down in the vertical direction, which helps to utilize gravity and air flow characteristics to optimize the distribution of cold air.

The second air duct assembly 3 is connected to the freezing chamber 1 and is responsible for providing cold air to the first air duct assembly 5. The first air duct assembly 5 is arranged between the freezing chamber 1 and the refrigerating chamber 2 and may play a role in regulating the airflow of the two refrigerating chambers 2 and the freezing chamber 1.

It can be seen from the above technical scheme that the present application provides an air duct assembly and a refrigerator, the air duct assembly comprising: a first air duct assembly 5; the first air duct assembly 5 is divided into a first chamber 51 and a second chamber 52 which are not connected to each other by a partition 513; the first chamber 51 comprises a first air inlet 511 and a plurality of first air outlets 512; the first air inlet 511 is arranged at one end of the first chamber 51; the first air outlets 512 are arranged equidistantly in the height direction; the second chamber 52 comprises a second air inlet 521, an electric damper 53 and a plurality of first air outlets 512; The second air outlet 522 is provided; the electric damper 53 is connected to the second air inlet 521; the second air inlet 521 is arranged at one end of the second chamber 52; a plurality of guide plates 523 are arranged in the second chamber 52, and the guide plates 523 divide the second chamber 52 into a plurality of independent air outlet ducts 55; the air outlet duct 55 is provided with a second air outlet 522, and the number of the air outlet ducts 55 is the same as the number of the second air outlets 522; when the electric damper 53 is closed, any two second air outlets 522 are not connected to each other. When the refrigerating chamber 2 does not need to be refrigerated, the electric damper 53 is closed, the second air outlets 522 are not connected to each other, and no convection is generated between the refrigerating chamber 2 and the second chamber 52, so as to solve the problem of cold air convection of the air duct assembly when the air duct assembly is arranged between the freezing chamber 1 and the refrigerating chamber 2.

Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims (9)

1. An air duct assembly, applied to a refrigerator, the refrigerator comprising a freezing chamber (1) and a refrigerating chamber (2), characterized in that it comprises: A first air duct assembly (5); the first air duct assembly (5) is divided into a first chamber (51) and a second chamber (52) which are not connected to each other by a partition plate (513); The first chamber (51) comprises a first air inlet (511) and a plurality of first air outlets (512); the first air inlet (511) is arranged at one end of the first chamber (51); and the first air outlets (512) are arranged at equal distances along the height direction; The second chamber (52) comprises a second air inlet (521), an electric damper (53) and a plurality of second air outlets (522); the electric damper (53) is connected to the second air inlet; the second air inlet (521) is arranged at one end of the second chamber (52); a plurality of guide plates (523) are arranged in the second chamber (52), and the guide plates (523) divide the second chamber (52) into a plurality of mutually independent air outlet ducts (55); the air outlet ducts (55) are arranged with the second air outlets (522), and the number of the air outlet ducts (55) is the same as the number of the second air outlets (522); when the electric damper (53) is closed, any two of the second air outlets (522) are not connected to each other; The first chamber (51) is in communication with the freezing chamber (1) via the first air outlet (512); The second chamber (52) is in communication with the refrigerating chamber (2) via the second air outlet (522). 2. The air duct assembly according to claim 1 is characterized in that the guide plate (523) includes a first guide plate (5231) and a second guide plate (5232), one end of the first guide plate (5231) is connected to a side of the second chamber (52) away from the partition (513), one end of the first guide plate (5231) is connected to the second guide plate (5232), and the first guide plate (5231) is arranged parallel to a horizontal plane; and one end of the second guide plate (5232) away from the first guide plate (5231) is connected to the second air inlet (521). 3. The air duct assembly according to claim 1 is characterized in that the width of the end of the air outlet duct (55) close to the second air inlet (521) is proportional to the height of the second air outlet (522) in the air outlet duct (55). 4. The air duct assembly according to claim 1, characterized in that the area of the second air outlet (522) is proportional to the height of the second air outlet (522). 5. The air duct assembly according to claim 1 is characterized in that a refrigeration cavity (112) recessed outward is provided on one side of the freezer compartment (1) close to the refrigeration compartment (2), and the refrigeration cavity (112) is provided with an evaporator (4), a defrost heater (41), a first refrigeration air outlet (113) and a second refrigeration air outlet (114); the evaporator (4) is connected to the defrost heater (41); the first refrigeration air outlet (113) is connected to the first air inlet (511), and the second refrigeration air outlet (114) is connected to the second air inlet (521). 6. The air duct assembly according to claim 5 is characterized in that it also includes a second air duct assembly (3), the second air duct assembly (3) includes a side panel (31), an air duct cover (32) and a fan (33); the side panel (31), the fan (33) and the air duct cover (32) are connected in sequence, the air duct cover (32) is snapped on the fan (33) to form a first air supply port (411) and a second air supply port (412), the first air supply port (411) is connected to the first cooling air outlet (113), and the second air supply port (412) is connected to the second cooling air outlet (114). 7. The air duct assembly according to claim 6, characterized in that the freezing chamber (1) comprises a refrigeration return air port (311), and the freezing chamber (1) is connected to the refrigeration cavity (112) through the refrigeration return air port (311); The second air duct assembly (3) comprises a freezer chamber return air outlet (115), wherein the freezer chamber return air outlet (115) is arranged on a side of the freezer chamber (1) close to the refrigeration chamber (2); The refrigerating chamber (2) further comprises a refrigerating chamber return air outlet (212), wherein the refrigerating chamber return air outlet (212) is arranged on a side of the refrigerating chamber (2) close to the freezing chamber (1); the refrigerating chamber (2) is connected to the refrigerating cavity (112) via the refrigerating chamber return air outlet (212) and the freezing chamber return air outlet (115). 8. The air duct assembly according to claim 1 is characterized in that it also includes a heat preservation component (54), one side of the first air duct assembly (5) is connected to the freezer compartment (1) through the heat preservation component (54), and the other side of the first air duct assembly (5) is connected to the refrigerator compartment (2) through the heat preservation component (54). 9. A refrigerator, characterized in that it comprises: the air duct assembly and a housing according to any one of claims 1 to 8, wherein the housing comprises a freezing chamber (1) and a refrigerating chamber (2); the freezing chamber (1) and the refrigerating chamber (2) are symmetrically arranged in a vertical direction; the air duct assembly comprises a second air duct assembly (3) and a first air duct assembly (5); The freezing chamber (1) is connected to the second air duct assembly (3); The first air duct assembly (5) is arranged between the freezing chamber (1) and the refrigerating chamber (2).