WO2023098748A1

WO2023098748A1 - Air-cooled refrigerator

Info

Publication number: WO2023098748A1
Application number: PCT/CN2022/135569
Authority: WO
Inventors: 姬立胜; 苗建林; 王睿龙; 崔展鹏; 刘勇豪
Original assignee: 青岛海尔电冰箱有限公司; 海尔智家股份有限公司
Priority date: 2021-12-03
Filing date: 2022-11-30
Publication date: 2023-06-08
Also published as: CN217465033U

Abstract

An air-cooled refrigerator, comprising a refrigerator body and a sealing cylinder. The refrigerator body has a storage compartment; the sealing cylinder is provided in the storage compartment; the sealing cylinder is provided with a sealing cavity opened forwardly, and at least part of the cylinder wall for defining the sealing cavity is configured as a condensation wall surface; and the condensation wall surface is configured to absorb cold of the storage compartment so as to condense water vapor in the sealing cylinder, thereby reducing air humidity of the sealing cavity. According to the air-cooled refrigerator, a condensation wall surface is used to condense water vapor in the sealing cavity, so as to reduce the air humidity of the sealing cavity, thereby facilitating the storage of fresh food materials, improving user experience, and facilitating popularization and use.

Description

air cooled refrigerator

technical field

The invention relates to the field of refrigeration and freezing, in particular to an air-cooled refrigerator.

Background technique

With the continuous development of technology, refrigerators have more and more storage functions. In the prior art, there have been refrigerators with sealed cylinders, so that users can store foodstuffs or other items in a sealed manner. However, since the sealed cylinder is relatively sealed, the ingredients put into the sealed cylinder will produce moisture under the action of transpiration, respiration, etc., and will be lost into the sealed cylinder, resulting in an increase in the air humidity of the sealed cylinder, and when the air in the sealed cylinder reaches supersaturation When the temperature is high, a large amount of condensation will be generated on the wall surface. When the amount of condensation accumulates to a certain extent, running water will be generated, which will lead to bad phenomena such as rot of stored ingredients and affect the freshness of ingredients.

Contents of the invention

An object of the present invention is to overcome at least one defect in the prior art and provide an air-cooled refrigerator.

A further object of the invention is to reduce the humidity of the air in the sealed cavity.

Another further object of the present invention is to increase the efficiency of condensation of water vapor.

Another further object of the present invention is to drain condensate collected in the sealed cavity.

In particular, the present invention provides an air-cooled refrigerator, comprising: a box body with a storage compartment;

The sealing cylinder is arranged in the storage compartment. The sealing cylinder has a sealing cavity open forward, and at least part of the cylinder wall for surrounding the sealing cavity is set as a condensation wall, and the condensation wall is configured to absorb the cold of the storage compartment. amount to condense the water vapor in the sealed cylinder, thereby reducing the air humidity in the sealed chamber.

Optionally, the cylinder wall includes a rear wall plate serving as the rear wall of the sealed cavity; and the condensation wall is configured as at least a part of the rear wall plate.

Optionally, the cylinder wall includes a bottom wall plate as the bottom wall of the sealed cavity; and the bottom wall plate is connected with the rear wall plate to form a sump, and the sump is located below the condensation wall to receive the condensation on the condensation wall. condensation.

Optionally, the bottom of the condensation wall is in the sump; and the condensation wall includes: a housing with an accommodating chamber, the bottom of which has an exposure opening facing the sump; The main body part and the extension part formed on the bottom of the main body part and protruding from the exposure opening, the water absorbing part is configured to use the extension part to absorb the condensed water in the sump and transfer to the main part.

Optionally, the casing includes an inner cover facing the sealing cavity and an outer cover away from the sealing cavity, and the inner cover and the outer cover are fastened together to define the accommodating cavity.

Optionally, the outer cover is provided with a plurality of steam exhaust holes, so that the condensed water absorbed by the main body is evaporated and discharged into the storage compartment.

Optionally, the outer cover protrudes from the outer surface of the rear wall.

Optionally, the box body also includes: an inner container; an air duct forming member arranged in front of the rear wall of the inner container to separate the inner container from the cooling chamber and the storage compartment located in front of the cooling chamber; the air duct forming member has The air return port of the storage compartment and the cooling chamber is connected, and the rear wall plate is arranged opposite to the air return port.

Optionally, an air volume distribution chamber is defined in the air duct forming part, and the air duct forming part has a plurality of air outlets for connecting the air volume distribution chamber and the storage compartment; the air-cooled refrigerator also includes: A channel forming member, with its air inlet end facing the cooling chamber, and its air outlet end facing the air volume distribution chamber, configured to promote the formation of a cooling airflow that enters the air volume distribution chamber from the cooling chamber and is discharged into the storage compartment from a plurality of air outlets .

Optionally, the sealing cylinder is located at the bottom of the storage compartment; and there is an air flow channel between the bottom wall plate and the bottom wall of the storage compartment.

In the air-cooled refrigerator of the present invention, since at least part of the cylinder wall used to enclose the sealed cavity is set as a condensation wall, the condensation wall can absorb the cold of the storage compartment and make it have a lower temperature, so when the sealed cavity When the humid air is oversaturated to generate condensation, the generated condensation will condense on the condensation wall surface, and slowly form water droplets as the condensed water droplets continue to accumulate, which will also separate the water vapor in the air in the sealed cavity, reducing the The humidity of the air in the sealed cavity makes the sealed cavity more conducive to storing fresh food.

Further, in the air-cooled refrigerator of the present invention, compared with other wall panels, the rear wall panel is closer to the cooling chamber, and at the same time is far away from the door body, so the temperature of the rear wall panel is lower than that of other wall panels, and the condensation wall is used as the rear wall Part of the panel, the temperature of the condensation wall is also lower than that of other wall panels. According to the thermodynamic principle, the lower the temperature, the easier it is to form condensation, and the water vapor in the sealed cavity is more likely to be condensed by the condensation wall, which improves the condensation efficiency.

Furthermore, in the air-cooled refrigerator of the present invention, a sump is formed at the joint between the bottom wall and the rear wall. The sump is located below the condensation wall and can receive condensation on the condensation wall. The extension of the water-absorbing member Absorb the condensed water in the sump, transfer it to the main body, and evaporate on the main body, and the evaporated condensed water is discharged into the storage compartment through the vent hole to complete the dehumidification of the sealed cylinder.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a sectional view of an air-cooled refrigerator according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a sealing cylinder in an air-cooled refrigerator according to an embodiment of the present invention;

Fig. 3 is an enlarged view of part A in Fig. 2;

Fig. 4 is a schematic diagram of the condensation wall in the air-cooled refrigerator according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of the condensation wall in the air-cooled refrigerator according to another embodiment of the present invention;

Fig. 6 is a schematic diagram of an outer cover in an air-cooled refrigerator according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

Referring to FIG. 1 , FIG. 1 is a cross-sectional view of an air-cooled refrigerator according to an embodiment of the present invention, wherein the dotted arrow shows the flow direction of the refrigerated airflow. The present invention provides an air-cooled refrigerator 1. The air-cooled refrigerator 1 may generally include a box body. The box body may also include an outer shell and at least one liner 10. The outer shell is located on the outermost side of the refrigerator 1 to protect the entire refrigerator 1. The inner liner 10 is wrapped by the outer shell, and a foam layer can be filled between two adjacent inner liners 10 and between the inner liner 10 and the outer shell, so as to reduce the heat dissipation of the inner liner 10 to the outside.

Further, the box body can also include an air duct forming member 30, which is arranged in front of the rear wall of the inner tank 10 to separate the inner tank 10 into the cooling chamber 12 and the storage compartment located in front of the cooling chamber 12 14, and the storage compartment 14 can be configured as a refrigerating room, a freezing room, a temperature-changing room, etc., and the number and functions of the specific storage compartment 14 can be configured according to the pre-required.

The storage compartment 14 defined by each inner container 10 can be opened forward, and the air-cooled refrigerator 1 can also include a door body 16, which is movably arranged in front of the inner container 10 to open and close the inner container. The storage compartment 14 of the tank 10 , for example, the door body 16 can be arranged on one side of the front of the box in a hinged manner, and the storage compartment 14 can be opened and closed by pivoting.

Further, the air-cooled refrigerator 1 can also be provided with cooling capacity by a circulating refrigeration system, which is composed of a compressor, a condenser, a throttling device, and an evaporator 40, etc., and the evaporator 40 can be arranged in the cooling chamber 12, so that Exchange heat with the air in the cooling chamber 12 to lower the temperature of the air.

An air outlet volume distribution chamber 32 is defined in the air passage forming part 30, and the air passage forming part 30 has a plurality of air outlets 34 for connecting the air volume distribution chamber 32 and the storage compartment 14, and the air passage forming part 30 has an opening for communicating with the storage room. chamber 14 and the air return port 36 of the cooling chamber 12, the evaporator 40 cools the air in the cooling chamber 12 and discharges it into the air volume distribution chamber 32 first, and then discharges it into the storage compartment 14 through a plurality of air outlets 34, so as to be compatible with The items in the storage compartment 14 exchange heat with the air. After the heat exchange, the hot air can also return to the cooling chamber 12 through the air return port 36, and continue to exchange heat with the evaporator 40 to realize cyclic heat exchange.

Further, the refrigerator 1 can also include a blower fan 50, the blower fan 50 is arranged on the air duct forming member 30, and its air inlet end faces the cooling chamber 12, and its air outlet end faces the air volume distribution chamber 32, configured as The cooling air flow from the cooling chamber 12 into the air volume distribution chamber 32 and discharged into the storage compartment 14 from the multiple air outlets 34 is formed. The blower fan 50 can provide circulation power for the cooling air flow and improve heat exchange efficiency.

When the air-cooled refrigerator 1 is cooling, the evaporator 40 exchanges heat with the air in the cooling chamber 12, and the blower fan 50 starts to force the air in the cooling chamber 12 to be blown into the air volume distribution chamber 32 of the air duct forming member 30. The refrigerated airflow is formed, and then distributed by the air volume distribution chamber 32 and sent into the storage compartment 14 from multiple air outlets 34, and then the refrigerated airflow exchanges heat with the items and air in the storage compartment 14 to achieve cooling. After the heat exchange, the refrigerated air flow can return to the cooling chamber 12 through the air return port 36, and continue to conduct with the evaporator 40 to realize cyclic heat exchange.

Referring to FIGS. 1 to 3 , FIG. 2 is a schematic diagram of the sealing cylinder 60 in the air-cooled refrigerator 1 according to an embodiment of the present invention, and FIG. 3 is an enlarged view of part A in FIG. 2 . In some embodiments, the refrigerator 1 can also include a sealing cylinder 60, the sealing cylinder 60 is arranged in the storage compartment 14, the sealing cylinder 60 has a sealing cavity 62 opened forward, and is used to enclose at least part of the sealing cavity 62 The cylinder wall is configured as a condensation wall surface 70 , and the condensation wall surface 70 is configured to absorb the cold of the storage compartment 14 to condense the water vapor in the sealed cylinder 60 , thereby reducing the air humidity of the sealed chamber 62 .

The sealed cylinder 60 can be arranged in the storage compartment 14 configured as a refrigerator, and the temperature of the storage compartment 14 can be kept between 1° C. and 10° C., making it suitable for storing fresh vegetables, fruits and other food materials. Of course, those skilled in the art should understand that the temperature range of the storage compartment 14 configured as a refrigerator can be further adjusted according to actual conditions, and the sealing cylinder 60 can also be arranged in other storage compartments 14, such as The storage compartment 14 configured as a cooling room, the storage compartment 14 configured as a freezer, etc. are not listed here.

Referring to FIG. 2 , specifically, the air-cooled refrigerator 1 may further include a drawer body 80 , and the drawer body 80 is retractably disposed in the sealed cavity 62 , so that users can take items in the drawer body 80 .

The sealed cylinder 60 is arranged in the storage compartment 14, and the refrigerated airflow can flow around the sealed cylinder 60 to conduct convective heat exchange with the outer surface of the cylinder wall of the sealed cylinder 60, and the outer surface of the cylinder wall can transfer the cold energy to the The inner surface of the cylinder wall, the inner surface of the cylinder wall can exchange heat with the air in the sealed cavity 62 by means of convective heat transfer, so as to reduce the temperature of the sealed cavity 62 .

As mentioned in the background technology section, since the sealed cylinder is relatively sealed, the food materials put into the sealed cylinder will generate moisture under the action of transpiration, respiration, etc., and will be lost into the sealed cylinder, resulting in the increase of air humidity in the sealed cylinder, and when When the air in the canister reaches supersaturation, a large amount of condensation will be generated on the wall surface. When the condensation accumulates to a certain extent, running water will be generated, which will lead to bad phenomena such as rot of stored ingredients and affect the freshness of ingredients.

In order to overcome the above-mentioned defects, in the air-cooled refrigerator 1 of this embodiment, at least part of the cylinder wall used to enclose the sealed cavity 62 is set as a condensation wall surface 70, and the condensation wall surface 70 can absorb the cooling capacity of the storage compartment 14, so that It has a lower temperature. When the humid air in the sealed cavity 62 is oversaturated to generate condensation, the generated condensation will condense on the condensation wall 70, and slowly form water droplets as the condensed water droplets continue to accumulate, which is about to The water vapor in the air in the sealed cavity 62 is separated, which reduces the humidity of the air in the sealed cavity 62, thereby making the sealed cavity 62 more conducive to storing fresh food.

In some embodiments, the cylinder wall of the sealed cylinder 60 may further include a rear wall plate 630 serving as the rear wall of the sealed chamber 62 , and the condensation wall surface 70 is configured as at least a part of the rear wall plate 630 .

Specifically, the sealing cylinder 60 can also be arranged to be roughly square, and the cylinder wall of the sealing cylinder 60 can also generally include a top wall plate 610 as the top wall of the sealing cavity 62, a bottom wall plate 620 as the bottom wall of the sealing cavity 62, and The two side wall panels 640 as the two side walls of the sealed chamber 62, the top wall panel 610, the bottom wall panel 620, the rear wall panel 630 and the two side wall panels 640 can jointly enclose the sealed cavity 62 and make it open forward. .

Compared with other wall plates, the rear wall plate 630 is closer to the cooling chamber 12 and farther away from the door body 16. Therefore, the temperature of the rear wall plate 630 is lower than that of other wall plates. According to the principle of thermodynamics, the lower the temperature, the easier it is to Condensation is formed. When the condensation wall 70 is a part of the rear wall 630, the temperature of the condensation wall 70 is also lower than that of other walls, and the water vapor in the sealed cavity 62 is more likely to be condensed by the condensation wall 70, which improves the condensation efficiency. .

Referring to FIG. 3 , further, a sump 622 is formed at the connection between the bottom wall 620 and the rear wall 630 , and the sump 622 is located below the condensation wall 70 to receive condensation water on the condensation wall 70 .

When the humid air in the sealed chamber 62 is oversaturated to generate condensation, the generated condensation will first condense on the condensation wall surface 70 of the rear wall 630, and gradually form water droplets as the amount of condensed water accumulates, and the water droplets will form on themselves Under the action of gravity and the surface tension of the rear wall 630 , the surface of the rear wall 630 (or the condensation wall 70 ) flows downward into the sump 622 , which is convenient for cleaning the condensed water.

Referring to FIG. 3 to FIG. 5 , FIG. 4 is a schematic diagram of the condensation wall 70 in the air-cooled refrigerator 1 according to one embodiment of the present invention, and FIG. 5 is a schematic diagram of the condensation wall 70 in the air-cooled refrigerator 1 according to another embodiment of the present invention. Further, the bottom of the condensation wall 70 is in the sump 622, and the condensation wall 70 may also include a housing 710 and a water absorbing member 720, the housing 710 has an accommodating cavity, and the bottom of the housing 710 has a 622 reveals the opening 718, the water absorbing part 720 has a main body part 722 arranged in the accommodating cavity and an extension part 724 formed on the bottom of the main body part 722 and protruding from the revealing port 718, the water absorbing part 720 is configured to use the extension part 724 to absorb water The condensed water in the water tank 622 is transferred to the main body 722 .

The bottom of the condensation wall 70 is in the sump 622 , that is, the condensation wall 70 is directly connected to the sump 622 , and there is no other part of the rear wall 630 between them.

The main part 722 of the water absorbing part 720 is set in the housing cavity of the housing 710, and the extension part 724 of the water absorbing part 720 protrudes out of the housing cavity from the exposed opening 718 at the bottom of the housing 710, so that the extending part 724 of the water absorbing part 720 is directly in the collecting chamber. Inside the sink 622. The main body portion 722 and the extension portion 724 of the water-absorbing member 720 can be integrally formed, and made of water-absorbing and breathable material (such as fiberboard, etc.), so that the extension portion 724 of the water-absorbing member 720 can absorb the condensation collected in the sump 622 water, and transfer the condensed water to the main body 722 under the action of capillary phenomenon. On the one hand, the condensed water in the sump 622 can be cleaned up in time to prevent overflow, and on the other hand, the condensed water can be transferred to the main body with a larger area. 722, easy to evaporate and discharge.

Referring to FIG. 5 , further, the housing 710 may further include an inner cover 712 facing the sealed cavity 62 and an outer cover 714 away from the sealed cavity 62 . The inner cover 712 and the outer cover 714 are buckled together to define an accommodating cavity.

In some specific embodiments, both the inner cover 712 and the outer cover 714 can be made of plastic, such as ABS plastic, PS plastic and the like. In some other specific embodiments, the inner cover 712 can also be made of a metal material with better cooling performance, such as copper, aluminum, etc., the heat absorption coefficient of the metal material is relatively large, and the heat exchange capacity is strong, so that direct contact The temperature of the inner cover 712 of water vapor is lower, which improves the condensation efficiency.

Referring to FIG. 6 , FIG. 6 is a schematic diagram of an outer cover 714 in an air-cooled refrigerator 1 according to an embodiment of the present invention. Further, the outer cover 714 is provided with a plurality of exhaust holes 716 so that the condensed water absorbed by the main body 722 is evaporated and discharged into the storage compartment 14 .

A plurality of steam exhaust holes 716 are opened on the outer cover 714, and the steam exhaust holes 716 can communicate with the storage compartment 14 and the housing chamber 710. Since the main body part 722 is arranged in the housing chamber, steam from the main body part 722 The condensed water can be discharged from multiple exhaust holes 716 to reduce the humidity of the main part 722, so that a certain pressure difference can be maintained between the extension part 724 and the main part 722, and the extension part 724 can be sourced under the action of the pressure difference Condensed water in the sump 622 is continuously transferred to the main body 722 .

In addition, since the exhaust hole 716 can communicate with the storage compartment 14 and the accommodating chamber of the housing 710, the cooling airflow of the storage compartment 14 can also enter the accommodating cavity through the exhaust hole 716, thereby speeding up the cooling of the surface of the main body 722. The air flow rate increases the evaporation rate.

In addition, since the evaporated water is drained into the storage compartment 14, this also increases the humidity of the storage compartment 14. Referring to FIG.

To sum up, the dehumidification principle of the sealed cylinder 60 in the air-cooled refrigerator 1 of this embodiment is as follows: firstly, the condensation wall 70 can condense the water vapor in the sealed cavity 62 into condensed water; After converging on the top, water droplets are formed and flow into the sump 622. Finally, the extension part 724 of the water-absorbing member 720 absorbs the condensed water in the sump 622, and transfers to the main part 722, and evaporates on the main part 722. The evaporated condensed water flows from the The steam exhaust hole 716 discharges into the storage compartment 14 to complete the dehumidification of the sealed cylinder 60 .

Referring to FIG. 3 , further, the outer cover 714 can also protrude from the outer surface of the rear wall plate 630, which increases the contact area between the outer cover 714 and the cooling airflow of the storage compartment 14, and further improves the outer cover 714 and the entire The heat exchange efficiency of the casing 710 makes the temperature of the condensation wall 70 lower, and it is easier to condense water vapor.

Referring to FIG. 1 , in some embodiments, the rear wall plate 630 can also be arranged opposite to the air return port 36 , because the cooling air flow in the storage compartment 14 needs to flow from the return air port 36 after exchanging heat with the air in the storage compartment 14 . Returning to the cooling chamber 12, the arrangement of the rear wall plate 630 opposite to the air return port 36 can increase the air flow passing through the condensation wall surface 70 and further improve the evaporation efficiency.

Referring to FIG. 1 , in some embodiments, the sealed cylinder 60 is located at the bottom of the storage compartment 14 , and there is an air flow channel between the bottom wall plate 620 and the bottom wall of the storage compartment 14 , so that the stored items are discharged from the air outlet 34 The refrigerated airflow in the compartment 14 can perform convective heat exchange with each wall plate of the sealed cylinder 60 including the bottom wall 620 , that is, the refrigerated airflow can cool the sealed cylinder 60 in all directions, further optimizing the heat exchange of the sealed cylinder 60 .

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

An air-cooled refrigerator, comprising:

The box body has a storage compartment;

The sealing cylinder is arranged in the storage compartment, the sealing cylinder has a sealing cavity opened forward, and at least part of the cylinder wall for surrounding the sealing cavity is set as a condensation wall, and the condensation wall is configured The cold energy of the storage compartment is absorbed to condense the water vapor in the sealed cylinder, thereby reducing the air humidity of the sealed cavity.
The air-cooled refrigerator according to claim 1, wherein

the barrel wall includes a rear wall panel as the sealed cavity rear wall; and

The condensation wall surface is arranged as at least a part of the rear wall panel.
The air-cooled refrigerator according to claim 2, wherein

the cylinder wall includes a bottom wall plate as the bottom wall of the sealed chamber; and

A sump is formed at the connection between the bottom wall and the rear wall, and the sump is located below the condensation wall to receive the condensed water on the condensation wall.
The air-cooled refrigerator according to claim 3, wherein

the bottom of the condensation wall is in the sump; and

The condensation wall includes:

A housing having an accommodating chamber, the bottom of which has an exposure opening facing the sump;

a water absorbing member having a main body provided in the housing cavity and an extension formed at the bottom of the main body and protruding from the exposing opening, the water absorbing member being configured to utilize the extension Absorbs condensed water in the sump and transfers to the main body.
The air-cooled refrigerator according to claim 4, wherein

The housing includes an inner cover facing the sealed cavity and an outer cover away from the sealed cavity, the inner cover and the outer cover are fastened together to define the accommodating cavity.
The air-cooled refrigerator according to claim 5, wherein

The outer cover is provided with a plurality of exhaust holes, so that the condensed water absorbed by the main body can be discharged into the storage compartment after being evaporated.
The air-cooled refrigerator according to claim 5, wherein

The outer cover protrudes from the outer surface of the rear wall.
The air-cooled refrigerator according to claim 2, wherein the box further comprises:

liner;

an air duct forming member arranged in front of the rear wall of the inner tank to separate the inner tank into the cooling chamber and the storage compartment located in front of the cooling chamber;

The air duct forming member has an air return port communicating with the storage compartment and the cooling chamber, and the rear wall plate is disposed opposite to the air return port.
The air-cooled refrigerator according to claim 8, wherein

An air volume distribution cavity is defined in the air channel forming part, and the air channel forming part has a plurality of air outlets for communicating the air volume distribution cavity and the storage compartment;

The air-cooled refrigerator also includes:

The air supply fan is arranged on the air channel forming member, and its air inlet end faces the cooling chamber, and its air outlet end faces the air volume distribution chamber, configured to promote the formation of air flow from the cooling chamber into the air volume distribution chamber. And the refrigerated airflow discharged into the storage compartment from a plurality of the air outlets.
The air-cooled refrigerator according to claim 3, wherein

the sealed cylinder is located at the bottom of the storage compartment; and

There is an air flow channel between the bottom wall plate and the bottom wall of the storage compartment.