CN215864210U - Air duct device and refrigerator - Google Patents

Abstract

The utility model provides an air duct device which is suitable for being arranged in a compartment and comprises an air duct outer cover, an air duct inner cover and at least one fan, wherein the fan is suitable for being arranged in the air duct inner cover, the air duct inner cover is suitable for being arranged in the air duct outer cover, a first air duct is formed between the air duct outer cover and the air duct inner cover, a second air duct is formed in the air duct inner cover and communicated with an inner cavity of the compartment, air return structures are arranged on a plurality of end faces of the air duct outer cover, air in the compartment is suitable for entering the first air duct from the air return structures, and the fan is suitable for guiding the air from the first air duct to the second air duct. Compared with the prior art, the air return structure is arranged on the air duct outer cover, so that air can be returned from multiple directions of the compartment, the sufficient circulation of air in all directions in the compartment is ensured, and the consistency and uniformity of the temperature in all positions in the compartment are ensured.

Description

Air duct device and refrigerator

Technical Field

The utility model relates to the technical field of freezers, in particular to an air duct device and a freezer.

Background

The air duct device is mainly used for cooling the air in the refrigerating box, so that the temperature in the refrigerating box is kept at a stable and proper temperature. The refrigerating box is generally used for storing medicines, reagents, samples and the like, the requirement on the consistency and the uniformity of the temperature of each position in the refrigerating box chamber is high, the consistency and the uniformity of the temperature of the refrigerating box chamber are guaranteed by the circular flow of air in the refrigerating box chamber, and an air duct device arranged in the refrigerating box chamber in the prior art cannot act on each position of the refrigerating box chamber, so that the circulation of air in some places is poor, the consistency and the uniformity of the temperature of each position in the refrigerating box chamber cannot be guaranteed, and the storage of the medicines, the reagents, the samples and the like is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model solves the problem of how to realize the uniformity of the whole air circulation in the chamber, thereby ensuring the consistency and stability of the temperature of each direction in the chamber.

In order to solve the above problems, the present invention provides an air duct device, which is suitable for being disposed in a compartment, and includes an air duct outer cover, an air duct inner cover, and at least one fan, wherein the fan is suitable for being disposed in the air duct inner cover, the air duct inner cover is suitable for being disposed in the air duct outer cover, a first air duct is formed between the air duct outer cover and the air duct inner cover, a second air duct is formed in the air duct inner cover, the second air duct is communicated with an inner cavity of the compartment, air return structures are disposed on a plurality of end faces of the air duct outer cover, air in the compartment is suitable for entering the first air duct from the air return structures, and the fan is suitable for guiding air from the first air duct to the second air duct.

Compared with the prior art, the air duct device provided by the utility model is provided with two cover bodies, namely an air duct inner cover and an air duct outer cover, wherein the air duct inner cover is arranged in the air duct outer cover to form a first air duct between the air duct outer cover and the air duct inner cover, a second air duct is formed in the air duct inner cover, and air return structures are arranged on a plurality of end faces of the air duct outer cover, so that indoor air enters the first air duct from a plurality of end faces of the air duct outer cover through the air return structures, and then the air is guided into the second air duct from the first air duct through the fan and returns to the room through the second air duct to form circulation of air flow. The air return in a plurality of directions, thereby guarantee that indoor air can get into first wind channel from a plurality of position, and get into the second wind channel by first wind channel, lead back room portion through the second wind channel at last, with this homogeneity of guaranteeing the inside whole circulation of air of room, and then realize the uniformity and the homogeneity of room inside temperature.

Optionally, the air duct outer cover and the air duct inner cover are suitable for being attached to the inner wall of the compartment to form the first closed air duct, and the air duct inner cover is suitable for being attached to the inner wall of the compartment to form the second closed air duct.

Thereby, the first air duct and the second air duct are closed.

Optionally, the air return structure comprises a first air return structure and a second air return structure, the air duct housing comprises a bottom wall, and a front side wall, a left side wall and a right side wall which are arranged around the bottom wall, the first air return structure is arranged on the left side wall, the right side wall and the front side wall of the air duct housing, and the second air return structure is arranged on the bottom wall of the air duct housing.

Therefore, the flow speed and the flow direction of air in different areas can be adjusted by arranging the first air return opening structure and the second air return opening structure.

Optionally, the first air return opening structure includes a plurality of first holes disposed on a left side wall, a right side wall and a front side wall of the air duct outer cover, and the second air return opening structure includes a plurality of second holes disposed on a bottom wall of the air duct inner cover.

Therefore, the flow speed and the flow quantity of the air at the positions of the first air return opening structure and the second air return opening structure can be correspondingly changed according to the arrangement of the first hole and the second hole.

Optionally, a third air return opening is arranged at the bottom of the air duct inner cover, and the fan is adapted to guide air from the first air duct to the second air duct through the third air return opening.

Therefore, air is further guided into the second air channel from the first air channel, and air circulation between the first air channel and the second air channel is guaranteed.

Optionally, the second air return opening structure is aligned with the third air return opening.

Thereby, the third return air opening is facilitated to return more air from the second return air opening structure.

Optionally, the fan is disposed above the third air return opening and aligned with the third air return opening.

Thus, the amount of return air from the second return air inlet structure of the third return air inlet can be further increased, and the flow rate of the air can be increased.

Optionally, an air outlet is arranged at the rear part of the air duct inner cover, and the second air duct is communicated with the chamber inner cavity through the air outlet.

Therefore, the air in the air duct inner cover can return to the chamber inner cavity again, and the circulation of the air in the chamber is ensured.

Optionally, the air conditioner further comprises an evaporation assembly, a connecting plate is arranged on the lower edge of the air outlet, the evaporation assembly is fixedly connected with the connecting plate, and air in the air duct inner cover is suitable for entering the evaporation assembly through the air outlet and entering the chamber inner cavity through the evaporation assembly.

Therefore, the air flowing out of the air outlet is cooled, and the refrigerating requirement in the room is met.

The utility model also provides a refrigerating box which comprises the air duct device.

Compared with the prior art, the utility model has the following beneficial effects: the air duct device is arranged in the refrigerating box, air in the compartment enters the first air duct from the periphery of the air duct outer cover through the air return structure, the air is guided into the second air duct from the first air duct through the fan and is guided back to the compartment through the second air duct, and the air circulation in all directions in the refrigerating box is guaranteed, so that the consistency and the uniformity of the temperature in the compartment are realized.

Drawings

FIG. 1 is a schematic view of an installation position of an air duct device according to an embodiment of the present invention;

FIG. 2 is a schematic view of an internal layout structure of an air duct device according to an embodiment of the present invention;

FIG. 3 is a first schematic view of an overall structure of an air duct device according to an embodiment of the present invention;

FIG. 4 is a schematic view of an overall structure of an air duct device according to an embodiment of the present invention;

FIG. 5 is an exploded view of the internal structure of the air duct device in the embodiment of the present invention;

FIG. 6 is a schematic view of an outer cover of an air duct device according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of an inner cover of an air duct device according to an embodiment of the present invention;

fig. 8 is a schematic view of a water pan of an air duct device according to an embodiment of the present invention.

Description of reference numerals:

1-compartment, 2-air duct device, 3-air duct outer cover, 31-first air return structure, 311-first hole, 32-second air return structure, 321-second hole, 4-air duct inner cover, 41-third air return, 42-connecting plate, 5-fan, 6-first air duct, 7-second air duct, 8-evaporation component, 81-evaporator, 82-water pan, 821-diversion port, 9-air outlet and 10-motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the drawings of the embodiments of the present invention, a coordinate system XYZ is provided, in which a forward direction of the X axis represents a backward direction, a backward direction of the X axis represents a forward direction, a forward direction of the Y axis represents a right direction, a backward direction of the Y axis represents a left direction, a forward direction of the Z axis represents an upward direction, and a backward direction of the Z axis represents a downward direction.

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

The embodiment of the utility model provides an air duct device, wherein the air duct device 2 is suitable for being arranged in a compartment 1, the air duct device 2 comprises an air duct outer cover 3, an air duct inner cover 4 and at least one fan 5, the fan 5 is suitable for being arranged in the air duct inner cover 4, the air duct inner cover 4 is suitable for being arranged in the air duct outer cover 3, the top of the air duct outer cover 3 is suitable for being attached to the inner wall of the compartment 1, a first air duct 6 is formed between the air duct outer cover 3 and the air duct inner cover 4, a second air duct 7 is formed in the air duct inner cover 4, return air structures are arranged on a plurality of end faces of the air duct outer cover 3, air in the compartment 1 is suitable for entering the first air duct 6 from the return air structures, the fan 5 is suitable for guiding the air from the first air duct 6 to the second air duct 7, and the second air duct 7 is communicated with the inner cavity of the compartment 1.

Referring to fig. 1 to 5, the air duct device 2 may be installed on one of the inner walls of the compartment 1, specifically, in this embodiment, the air duct device 2 is fixedly installed on an inner top wall of the compartment 1, the air duct outer cover 3 and the air duct inner cover 4 are both of a shell structure, the shell structure at least includes a bottom wall, a top wall and one of the side walls disposed around the bottom wall and the top wall, specifically, the shape is not limited, and in this embodiment, the shell structure is preferably rectangular, that is, the air duct inner cover 4 and the air duct outer cover 3 both have a bottom wall, a top wall and a side wall disposed between the top wall and the top wall. The volume of wind channel inner cover 4 is less than wind channel dustcoat 3, from this, when wind cover inner cover 4 sets up in wind channel dustcoat 3, there is the interval space in the lateral wall outside all around of wind channel inner cover 4 and the lateral wall inboard all around of wind channel dustcoat 3, can form first wind channel 6 between wind channel dustcoat 3 and the wind channel inner cover 4 from this, is formed with second wind channel 7 in wind channel inner cover 4 inside simultaneously, is provided with fan 5 in the wind channel inner cover 4. Wherein, set up the return air structure on a plurality of terminal surfaces of the wind channel outer cover 3, therefore the fan 5 helps from all directions of the room 1 to carry on the return air when operating, will form the negative pressure in the first wind channel when the fan 5 sucks the air of all directions in the room 1 into the first wind channel 6, thus increase the mobility of the air. Simultaneously, fan 5 is in leading-in second wind channel 7 with the air in the first wind channel 6 when inhaling first wind channel 6 with the interior air of compartment 1, second wind channel 7 intercommunication compartment 1 is inside, thereby carry back the inside air in second wind channel 7 to compartment 1 in, guaranteed the inside whole air cycle's of compartment 1 homogeneity from this, make the stability and the uniformity of the whole temperature in compartment 1 effectively guarantee, avoid having some position air in compartment 1 to obtain effective circulation, cause the inside temperature in each position in compartment 1 to have the condition of difference.

Referring to fig. 1 to 3, preferably, when the air duct device 2 is fixedly installed on the top wall of the interior of the compartment 1, because the top of the air duct outer cover 3 is flush with the top of the air duct inner cover 4, the air duct inner cover 4 and the air duct outer cover 3 can be open structures including a bottom wall and a side wall, the air duct outer cover 3 and the air duct inner cover 4 are both attached to the inner wall of the compartment 1, the top of the air duct outer cover 3 and the top of the air duct inner cover 4 are jointly sealed by the inner wall of the compartment 1, so that a first closed air duct 6 is formed between the air duct outer cover 3 and the air duct inner cover 4, and meanwhile, the top of the air duct inner cover 4 is also sealed by the inner wall of the compartment 1, so that a second air duct 7 is formed in the air duct inner cover 4.

Therefore, it can be understood that the top of the air duct outer cover 3 and the air duct inner cover 4 is an open structure, and the top of the air duct outer cover 3 and the air duct inner cover 4 needs to be covered and closed. Because wind channel dustcoat 3 and wind channel inner cover 4 are installed in compartment 1, just can seal wind channel dustcoat 3 and wind channel inner cover 4 through laminating with the inner wall of compartment 1, thereby avoided wind channel dustcoat 3 and wind channel inner cover 3's structure too complicated, the open-top structure of wind channel dustcoat 3 and wind channel inner cover 4 can be convenient for process simultaneously, consequently in this embodiment, the preferred open-top structure of wind channel dustcoat 3 and wind channel inner cover 4's structure.

Thus, in other embodiments, the structures of the duct outer cover 3 and the duct inner cover 4 may be integrated cover structures each having a top portion, or plate-like structures that are separately installed at the top openings of the duct outer cover 3 and the duct inner cover 4 to cover the top openings of the duct outer cover 3 and the duct inner cover 4.

In other embodiments, when the air duct inner cover 4 is installed in the air duct outer cover 3, the first air duct 6 is closed by bending the edge of the air duct inner cover 4 toward the edge of the air duct outer cover 3.

In other embodiments, the air duct device 2 may be installed at another position of the compartment 1.

As shown in fig. 6, preferably, the air return structure includes a first air return structure 31 and a second air return structure 32, the first air return structure 31 is disposed on the left side wall, the right side wall and the front side wall of the air duct housing 3, and the second air return structure 32 is disposed on the bottom wall of the air duct housing 3. The air in the direction opposite to the side walls on the two sides of the air duct outer cover 3 in the compartment 1 and the direction opposite to the side wall on the front side of the air duct outer cover 3 can be enabled to circulate, and the air circulation in each direction in the compartment 1 is effectively guaranteed. Thereby achieving the fluidity of the whole air in the compartment 1 and ensuring the stability and consistency of the temperature in the compartment 1.

The first air return opening structure 31 is composed of a plurality of first holes 311 which are uniformly arranged along the width direction of the left side wall and the right side wall and the length direction of the front side wall respectively, the second air return opening structure 32 is composed of a plurality of second holes 321, the number of the second holes 321 of the second air return opening structure 32 corresponds to the number of the fans 5, the plurality of first holes 311 and the plurality of second holes 321 are arranged, the air inlet amount can be increased, and the air circulation efficiency is improved. Thus, when the fan 5 starts to operate, the fan 5 sucks air into the first air duct 6 from the first holes 311 of the left and right side walls and the front side wall of the air duct housing 3 and the second hole 321 of the bottom of the air duct housing 3, thereby ensuring air circulation in each direction in the compartment 1.

It should be noted that in the present embodiment, it is preferable that the first hole 311 is a smaller annular hole, and the second hole 321 is a larger circular hole. By arranging the first holes 311 with different sizes, the flow rate and the flow rate of air flowing through the side walls on the two sides and the side wall on the front side can be optimized, and by arranging the second holes 321 with different sizes, the flow rate and the flow rate of air flowing through the bottom of the air duct outer cover 3 can be optimized, so that the air circulation in each direction in the compartment 1 can be optimized. Therefore, the shapes and the specific sizes of the first hole 311 and the second hole 321 are not particularly limited, and may be changed according to actual requirements.

It should be understood that the left and right side walls of the duct cover 3 refer to two opposite side walls of the duct cover 3 in the width direction, and the front side wall refers to the front end surface of the duct cover 3.

Referring to fig. 5 and 7, a third air return opening 41 is disposed at the bottom of the air duct inner cover 4, and the first air duct 6 is communicated with the second air duct 7 through the third air return opening 41, so that when the fan 5 in the air duct inner cover 4 operates, air in the compartment 1 can be sucked into the first air duct 6, and then the air is guided into the second air duct 7 through the third air return opening 41 by the first air duct 6.

The position of the third air return opening 41 corresponds to the position of the second air return opening structure 32 of the air duct outer cover 3, when the air duct inner cover 4 is installed in the air duct outer cover 3, the third air return opening 41 coincides with the second air return opening structure 32, therefore, when the air in the compartment 1 passes through the second air return opening structure 32, because the second air return opening structure 32 is aligned with the third air return opening 41, the third air return opening 41 can directly vertically guide the air entering from the second air return opening structure 32 into the second air duct 7, the distance from the air entering from the second air return opening structure 32 to the middle circulation of the third air return opening 41 is shortened, thereby facilitating the faster return air from the second air return opening structure 32, and simultaneously improving the air circulation amount.

Preferably, as shown in fig. 5, when the air duct inner cover 4 is disposed in the air duct outer cover 3, the third air return opening 41 of the air duct inner cover 4 is aligned with the second air return opening structure 32 of the air duct outer cover 3, and the fan 5 is disposed in the air duct inner cover 4 and is located right above the third air return opening 41 of the air duct inner cover 4. Therefore, when the fan 5 operates, the air in the inner cavity of the compartment 1 is sucked by the first air return opening structure 31 arranged on the left side wall and the right side wall of the air duct outer cover 3 and the second air return opening structure 32 arranged at the bottom of the air duct outer cover 3, when the third air return opening 41 is aligned with the second air return opening structure 32 and the fan 5 is opposite to the third air return opening 41, when the fan 5 operates, the fan 5 can directly act on the second air return opening structure 32 to directly generate a vertical upward suction force on the second air return opening structure 32, so that the fan 5 can directly make the air in the compartment 1 directly enter the second air duct 7 through the second air return opening structure 32 of the air duct outer cover 3, and the air intake and the flow rate of the third air return opening 41 are further improved.

Referring to fig. 4 and 7, an air outlet 9 is disposed on the rear side of the air duct inner cover 4, and the air outlet 9 is communicated with the inner cavity of the compartment 1. Therefore, when air is sucked into the first air duct 6 from the air return structure by the fan 5 and guided into the second air duct 7, the air in the second air duct 7 returns to the interior of the compartment 1 through the air outlet 9 arranged on the rear side surface, so that the circulation of the air in the compartment 1 is formed.

As shown in fig. 4 and 5, the air duct device 2 further includes an evaporation assembly 8, a connection plate 42 is disposed at a lower edge of the air outlet 9, the evaporation assembly 8 is fixed at the air outlet 9 through the connection plate 42, the evaporation assembly 8 is mainly used for cooling air flowing through the air outlet 9, the air flowing through the air outlet 9 is cooled by the evaporation assembly 8 and then conveyed back to the inner cavity of the compartment 1, the cooled air flows downward to the bottom of the inner cavity of the compartment 1, the air above is sucked into the first air duct 6 from various directions inside the compartment 1 through the air return structure by the fan 5, and then enters the second air duct 7 through the first air duct 6, and the air flowing out of the air outlet 9 of the second air duct 7 is further cooled, on the premise of uniformity of the whole air circulation in the compartment 1, uniformity and consistency of the whole temperature in the compartment 1 can be further ensured.

As shown in fig. 5 and 8, preferably, the evaporation assembly 8 includes an evaporator 81 and a water pan 82, the edge of the water pan 82 is fixedly connected to the connecting plate 42 through bolts or screws, the specific connection manner is not particularly limited, as long as the fixed connection between the water pan 82 and the connecting plate 42 can be achieved, the evaporator 81 is fixed above the water pan 82, and the evaporator 81 covers the air outlet 9, thereby ensuring that the air flowing through the air outlet can be cooled through the evaporator 81, and meanwhile, the water generated after condensation of the evaporator 81 can flow into the water pan 82, thereby preventing the water from directly flowing into the chamber 1 to affect the use.

As shown in fig. 8, preferably, a diversion port 821 is disposed on a side wall of the water pan 82, and is used for draining condensed water collected inside the water pan 82, so as to prevent the condensed water of the water pan 82 from overflowing too much.

In other embodiments, the air duct inner cover 4 and the water pan 82 may be integrally formed, so as to avoid installation between the air duct inner cover 4 and the water pan 82.

As shown in fig. 5, preferably, a motor 10 is further disposed in the air duct inner cover 4, and the motor 10 is configured to rotate the motor 10.

This embodiment still provides a fridge, set up a plurality of return air structures on the wind channel dustcoat 3 through this wind channel device 2, can carry out the return air from a plurality of positions of fridge compartment 1, guarantee the abundant circulation of the inside each position air of compartment 1, thereby guarantee the uniformity and the homogeneity of the inside each position temperature of compartment 1, avoid having some positions in the compartment 1 because of can't obtain effectual air cycle and cause and obtain abundant air cycle's local temperature inconsistent.

In other embodiments, the air duct device may be installed in other box structures requiring air circulation, so as to circulate the air in the box in all directions.

In the description herein, references to the terms "an embodiment," "one embodiment," and "one implementation," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or implementation is included in at least one embodiment or example implementation of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An air duct device is characterized in that the air duct device is suitable for being arranged in a compartment (1) and comprises an air duct outer cover (3), an air duct inner cover (4) and at least one fan (5), the fan (5) is suitable for being arranged in the air duct inner cover (4), the air duct inner cover (4) is suitable for being arranged in the air duct outer cover (3), a first air duct (6) is formed between the air duct outer cover (3) and the air duct inner cover (4), a second air duct (7) is formed in the air duct inner cover (4), the second air duct (7) is communicated with the inner cavity of the compartment (1), air return structures are arranged on a plurality of end faces of the air duct outer cover (3), air in the compartment (1) is suitable for entering the first air duct (6) from the air return structures, the fan (5) is adapted to direct air from the first air duct (6) to the second air duct (7).

2. The air duct device according to claim 1, characterized in that the duct outer cover (3) and the duct inner cover (4) are adapted to fit with the inner wall of the compartment (1) to form the closed first air duct (6), and the duct inner cover (4) is adapted to fit with the inner wall of the compartment (1) to form the closed second air duct (7).

3. The air duct device according to claim 1, wherein the air return structure comprises a first air return structure (31) and a second air return structure (32), the air duct housing (3) comprises a bottom wall and a front side wall, a left side wall and a right side wall arranged around the bottom wall, the first air return structure (31) is arranged on the left side wall, the right side wall and the front side wall of the air duct housing (3), and the second air return structure (32) is arranged on the bottom wall of the air duct housing (3).

4. An air duct device according to claim 3, wherein the first air return structure includes a plurality of first holes (311) provided on the left, right and front side walls of the air duct outer cover (3), and the second air return structure includes a plurality of second holes (321) provided on the bottom wall of the air duct inner cover (4).

5. An air duct device according to claim 3, wherein a third air return opening (41) is provided at the bottom of the air duct inner cover (4), and the fan (5) is adapted to guide air from the first air duct (6) into the second air duct (7) through the third air return opening (41).

6. Air duct device according to claim 5, characterized in that the second return air opening structure (32) is arranged in line with the third return air opening (41).

7. Air duct device according to claim 6, characterized in that the fan (5) is arranged above the third return air opening (41) and aligned with the third return air opening (41).

8. The air duct device according to claim 1, characterized in that an air outlet (9) is arranged at the rear of the air duct inner cover (4), and the second air duct (7) is communicated with the inner cavity of the compartment (1) through the air outlet (9).

9. The air duct device according to claim 8, further comprising an evaporation assembly (8), wherein a connecting plate (42) is disposed at a lower edge of the air outlet (9), the evaporation assembly (8) is fixedly connected to the connecting plate (42), and air in the inner air duct cover (4) is adapted to enter the evaporation assembly (8) through the air outlet (9) and enter an inner cavity of the compartment (1) through the evaporation assembly (8).

10. A cooler, comprising the air duct device as claimed in any one of claims 1 to 9.

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