CN115962596A

CN115962596A - Air-cooled refrigerator

Info

Publication number: CN115962596A
Application number: CN202111182745.0A
Authority: CN
Inventors: 王少一; 崔展鹏; 陈建全
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2023-04-14
Also published as: WO2023061211A1

Abstract

The invention provides an air-cooled refrigerator which comprises a refrigerator body, an evaporator, an axial flow fan and an air door in pivot connection with the refrigerator body. The refrigerator body is limited with a refrigeration chamber, a storage chamber, a refrigeration air channel, an air return channel and a defrosting air channel, and the refrigeration chamber, the axial flow fan, the refrigeration air channel, the storage chamber and the air return channel are sequentially communicated end to form a refrigeration cycle air path. The refrigerating chamber, the defrosting air duct and the axial flow fan are sequentially communicated end to form a defrosting circulation air path. The air inlet of the defrosting air channel is arranged close to the air outlet of the air return channel, and the air door is used for selectively sealing the air inlet of the defrosting air channel and the air outlet of the air return channel. When the axial flow fan rotates forwards, the air is driven to enable the air door to rotate to the first position for closing the air inlet of the defrosting air channel, and the air flowing through the refrigerating chamber flows in the refrigerating circulation air path. When the axial flow fan rotates reversely, the driving air enables the air door to rotate to the second position of the air outlet of the closed air return channel, and the air flowing through the refrigerating chamber flows in the defrosting circulation air path.

Description

Air-cooled refrigerator

Technical Field

The invention belongs to the technical field of refrigerators, and particularly provides an air-cooled refrigerator.

Background

The existing air-cooled refrigerator generally comprises a refrigerating chamber, a refrigerating air duct, a storage chamber and an air return channel which are communicated in sequence. The existing air-cooled refrigerator also has an evaporator disposed in the refrigerating chamber to cool air in the refrigerating chamber and a fan. The fan is used for driving air to circularly flow along paths of the refrigerating chamber, the refrigerating air duct, the storage chamber and the return air channel so as to convey air cooled by the evaporator in the refrigerating chamber into the storage chamber and cool stored objects (including food materials, medicines, wine, biological reagents, bacterial colonies, chemical reagents and the like) in the storage chamber.

The stored objects in the storage chamber often comprise food materials with high moisture content, and moisture in the outside can enter the storage chamber, so that the humidity in the storage chamber is high, and the moisture can form frost attached to the evaporator when the evaporator is cooled. When the amount of frost on the evaporator is large, the cooling effect of the evaporator on the ambient air is affected, and therefore, the evaporator needs to be periodically defrosted.

In the prior art, the fan is usually stopped and then the evaporator is heated by the electric heating device. In the process that the electric heating device heats the evaporator, heat is gradually transferred to the whole evaporator from point to surface, and then frost on the evaporator is melted. Because a certain time is needed for transferring heat to the whole evaporator, the defrosting time of the evaporator is longer, and the defrosting efficiency is lower.

Disclosure of Invention

An object of the present invention is to provide a new air-cooled refrigerator to improve the defrosting efficiency of the evaporator of the air-cooled refrigerator.

In order to achieve the purpose, the invention provides an air-cooled refrigerator, which comprises a refrigerator body, an evaporator, an axial flow fan and an air door pivotally connected with the refrigerator body, wherein the refrigerator body is limited with a refrigerating chamber, a storage chamber, a refrigerating air duct, an air return channel and a defrosting air duct, and the refrigerating chamber, the axial flow fan, the refrigerating air duct, the storage chamber and the air return channel are sequentially communicated end to form a refrigerating circulation air path; the refrigerating chamber, the defrosting air duct and the axial flow fan are sequentially communicated end to form a defrosting circulation air path; the air inlet of the defrosting air channel is arranged close to the air outlet of the air return channel, and the air door is used for selectively sealing the air inlet of the defrosting air channel and the air outlet of the air return channel; when the axial flow fan rotates forwards, the air is driven to enable the air door to rotate to a first position for sealing the air inlet of the defrosting air duct, and air flowing through the refrigerating chamber flows in the refrigerating circulation air path; and when the axial flow fan rotates reversely, the driving gas enables the air door to rotate to a second position for sealing the air outlet of the return air channel, and the gas flowing through the refrigerating chamber flows in the defrosting circulation wind path.

Optionally, the air door includes first air door portion, second air door portion and is located first air door portion with pivot portion between the second air door portion, first air door portion is used for sealing the air intake in defrosting wind channel, second air door portion is used for sealing the air outlet of return air passageway, the air door passes through pivot portion with refrigerator body pivotal connection.

Optionally, the air inlet of the defrosting air duct is located on the upper side of the air outlet of the return air channel, so that the air door passes through the second air door part under the action of self gravity to seal the air outlet of the return air channel.

Optionally, the size of the air inlet of the defrosting air duct is smaller than that of the air outlet of the return air channel; and/or the extension surface of the first air door part is smaller than that of the second air door part.

Optionally, the damper is a V-shaped sheet structure made of a lightweight material.

Alternatively, the axial flow fan is configured such that the rotation speed at the time of reverse rotation becomes larger as the temperature in the cooling chamber increases.

Optionally, the air-cooled refrigerator further comprises a heating device disposed above the evaporator.

Optionally, the axial flow fan is obliquely disposed above the heating device.

Optionally, the top surface of the evaporator is obliquely arranged so that the air blown out from the inverted axial flow fan is blown perpendicularly to the top surface; and/or the heating device is parallel to the top surface of the evaporator.

Optionally, the refrigerator body includes an air duct cover plate, the refrigeration air duct and the defrosting air duct are both formed on the air duct cover plate, and the air door is installed on the air duct cover plate.

Based on the foregoing description, it can be understood by those skilled in the art that, in the foregoing technical solution of the present invention, the air-cooled refrigerator forms a refrigeration cycle air path in which the refrigeration chamber, the axial flow fan, the refrigeration air duct, the storage chamber, and the return air channel are sequentially communicated end to end, forms a defrosting cycle air path in which the refrigeration chamber, the defrosting air duct, and the axial flow fan are sequentially communicated end to end, and forces the air door to rotate to the first position closing the air inlet of the defrosting air duct by the forward axial flow fan, so that the air flowing through the refrigeration chamber flows in the refrigeration cycle air path to refrigerate the stored object in the storage chamber; and the air door is forced to rotate to a second position for sealing the air outlet of the air return channel by the reversed axial flow fan, so that the air flowing through the refrigerating chamber flows in the defrosting circulation air path, and the evaporator is subjected to auxiliary defrosting. Specifically, when axial fan reverses, can force the high-temperature gas in the defrosting circulation wind path to blow and spout and flow through the evaporimeter continuously, make each part of evaporimeter be heated evenly, for making the evaporimeter through the mode of self heat transfer with heat transfer to whole body, the evaporimeter can be heated fast evenly, gets rid of the frost on the evaporimeter fast, and then has promoted the defrosting effect of evaporimeter. Meanwhile, the flowing gas can promote the mixture of frost and frost water to be separated from the evaporator, and the defrosting effect of the evaporator is further improved.

And the air door is controlled by the forward and reverse rotation of the axial flow fan to selectively seal the air inlet of the defrosting air channel and the air outlet of the return air channel, the control logic of the air-cooled refrigerator is relatively simple, and the production cost is low.

Further, the rotational speed of the axial flow fan is increased as the temperature of the cooling compartment increases, so that the flow rate of the gas in the defrosting circulation air passage is increased as the rotational speed of the axial flow fan increases. Because the air pressure of the air is reduced along with the increase of the flow velocity, the air pressure in the defrosting circulation air path can be reduced by increasing the rotating speed of the axial flow fan, so that the air pressure in the defrosting circulation air path is slightly lower than the air pressure in the storage chamber, the high-temperature air in the defrosting circulation air path is prevented from entering the storage chamber, and the temperature rise of the storage chamber during the defrosting of the evaporator is avoided.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly explain the technical solution of the present invention, some embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. Those skilled in the art will appreciate that elements or portions of the same reference number identified in different figures are the same or similar; the drawings of the invention are not necessarily to scale relative to each other.

In the drawings:

FIG. 1 is a schematic view of an air-cooled refrigerator (cooling mode) according to some embodiments of the present invention;

FIG. 2 is a schematic view of the principle of an air-cooled refrigerator (defrost mode) in some embodiments of the invention;

FIG. 3 is a schematic view of a first axial effect of a portion of a duct cover in some embodiments of the invention;

FIG. 4 is a schematic representation of a second axial effect of a portion of an air duct cover in some embodiments of the invention;

FIG. 5 isbase:Sub>A cross-sectional view of the airway cover portion of FIG. 4 taken along the direction A-A;

FIG. 6 is a cross-sectional view of the airway cover portion of FIG. 4 taken along the direction B-B;

FIG. 7 is a schematic illustration of the structural effect of a damper according to some embodiments of the present invention.

Detailed Description

It should be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present invention, not all of the embodiments of the present invention, and the part of the embodiments are intended to explain the technical principle of the present invention and not to limit the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, shall fall within the scope of protection of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, it should be noted that, for convenience of description and to enable a person skilled in the art to quickly understand the technical solutions of the present invention, only the technical features that are strongly (directly or indirectly) associated with the technical problems and/or technical concepts to be solved by the present invention will be described below, and detailed descriptions of the technical features that are weakly associated with the technical problems and/or technical concepts to be solved by the present invention will not be repeated. Since the technical features with the weak degree of association belong to the common general knowledge in the field, the present invention does not cause insufficient disclosure of the present invention even if the features with the weak degree of association are not described.

As shown in fig. 1 and 2, in some embodiments of the present invention, an air-cooled refrigerator includes a refrigerator body 1, an evaporator 2, an axial flow fan 3, a heating device 4, and a damper 5.

With continued reference to fig. 1 and 2, the refrigerator body 1 defines a refrigerating compartment 101, a storage compartment 102, a refrigerating duct 103, a return air passage 104, and a defrosting duct 105. The refrigerating chamber 101, the axial flow fan 3, the refrigerating air duct 103, the storage chamber 102, and the return air duct 104 are sequentially connected end to end, and thus form a refrigerating cycle air path (not labeled in the figure). The refrigerating chamber 101, the defrosting air duct 105 and the axial flow fan 3 are sequentially communicated end to end, and thus a defrosting circulation air path (not marked in the figure) is formed.

As shown in fig. 1, when the air-cooled refrigerator operates in the cooling mode, air circulates in the cooling circulation air passage through the following paths: the refrigerating compartment 101 → the axial flow fan 3 → the cooling duct 103 → the storage compartment 102 → the return air duct 104 → the refrigerating compartment 101.

As shown in fig. 2, when the air-cooled refrigerator operates in the defrosting mode, the air circulates in the defrosting circulation air passage, and the air flows through the following paths: cooling compartment 101 → defrosting duct 105 → axial fan 3 → cooling compartment 101.

With continued reference to fig. 1 and 2, the refrigerator body 1 includes an air duct cover 110, and the cooling air duct 103 and the defrosting air duct 105 are formed on the air duct cover 110.

As shown in fig. 1 to 6, an outlet (referred to as a first outlet 1031) of the cooling air duct 103 is disposed at a front side of the air duct cover 110 so that the cooling air duct 103 blows cold air into the storage chamber 102 through the first outlet 1031. An air inlet (referred to as a third air inlet 1051) of the defrosting air duct 105 is disposed at the rear side of the air duct cover 110, so that the defrosting air duct 105 receives the air in the refrigerating compartment 101 through the third air inlet 1051.

With continued reference to fig. 1 and fig. 2, the air inlet (third air inlet 1051) of the defrosting air duct 105 is disposed adjacent to the air outlet (denoted as second air inlet 1041) of the return air duct 104, and the third air inlet 1051 of the defrosting air duct 105 is located above the second air inlet 1041 of the return air duct 104, so that the air door 5 closes the second air inlet 1041 of the return air duct 104 under the action of its own gravity.

As shown in fig. 5 and 6, in some embodiments of the present invention, there are two cooling air ducts 103, one defrosting air duct 105, and the defrosting air duct 105 is located between the two cooling air ducts 103, so that the flow cross-sectional area of the cooling air duct 103 is as large as possible to reduce the resistance of the cooling air duct 103 to gas.

Returning to continue with fig. 1 and 2, the evaporator 2 is disposed within the refrigeration compartment 101, and the evaporator 2 is located between the ends of the defrost duct 105.

As shown in fig. 1, 2, and 4, the axial flow fan 3 is provided above the evaporator 2 and drives the air to flow in the refrigeration cycle air passage or the defrost cycle air passage. Specifically, the axial flow fan 3 is disposed obliquely above the evaporator 2 and close to the evaporator 2. The angle between the axial fan 3 (specifically, the rotation axis of the impeller of the axial fan 3) and the horizontal plane is 0 ° to 45 °, for example, 5 °, 15 °, 30 °, 45 °, and the like. Further, the top surface of the evaporator 2 is obliquely arranged so that the air blown out from the counter-rotating axial flow fan 3 is blown perpendicularly to the top surface of the evaporator 2, thereby allowing the air to uniformly pass through the gaps on the evaporator 2. The condition that the air flow flowing through the evaporator 2 is not uniformly distributed is avoided, namely, the condition that the air flow rate of one part of gaps in the evaporator 2 is high and the air flow rate of the other part of air is low is avoided.

As shown in fig. 1, when the air-cooling type refrigerator is operated in the cooling mode, the axial flow fan 3 is rotated in the normal direction to drive the air to flow in the direction indicated by the arrow in fig. 1.

As shown in fig. 2, when the air-cooling type refrigerator is operated in the defrosting mode, the axial flow fan 3 is reversed, and the driving air flows in the direction indicated by the arrow in fig. 2.

As shown in fig. 1 and 2, a heating device 4 is optionally provided on the top of the evaporator 2 so that the air heated by the heating device 4 is sent downward by the counter-rotating axial flow fan 3, blowing against the evaporator 2, thereby causing each part of the evaporator 2 to be uniformly heated. Preferably, the heating device 4 is located at an upper side of the evaporator 2 with a gap between the heating device 4 and the evaporator 2 so that the heating device 4 sufficiently heats the gas flowing therethrough. Further preferably, the heating means 4 is substantially parallel to the top surface of the evaporator 2.

In addition, in other embodiments of the present invention, the skilled person can also arrange the heating device 4 at other positions of the evaporator 2, for example, arrange the heating device 4 at the bottom or the middle of the evaporator 2, or arrange the heating device 4 at various positions of the evaporator 2, as required. Merely installing the heating device 4 at another position of the evaporator 2 may increase the power consumption of the heating device 4 or may lower the heating efficiency of the evaporator 2.

Further, the heating device 4 is preferably an electric heating device, such as an electric heating wire. Furthermore, the skilled person may, if desired, arrange the heating means 4 as any other feasible heating means, such as a condenser arranged at the bottom side of the evaporator 2, or use a part or all of the evaporator 2 as a condenser during defrosting of the evaporator 2.

As shown in fig. 1 to 4, 6 and 7, the damper 5 is pivotally mounted on the duct cover 110 for selectively closing the third intake opening 1051 of the defrosting duct 105 and the second intake opening 1041 of the return air duct 104.

As shown in fig. 4 and 7, the damper 5 includes a first damper portion 51, a second damper portion 52, and a pivot portion 53 between the first damper portion 51 and the second damper portion 52. The first damper portion 51 is used for closing the third air inlet 1051 of the defrosting air duct 105, the second damper portion 52 is used for closing the second air outlet 1041 of the return air channel 104, and the damper 5 is pivotally connected with the air duct cover plate 110 through the pivot portion 53.

As can be seen from fig. 4 and 7, the extension surface of the first damper portion 51 is smaller than that of the second damper portion 52, so that the first damper portion 51 is adapted to the third air inlet 1051 of the defrosting duct 105, and the second damper portion 52 is adapted to the second air outlet 1041 of the return air duct 104.

As can be seen in fig. 1, 2, 4 and 7, the damper 5 is a generally V-shaped sheet structure. Preferably, the damper 5 is a V-shaped sheet structure made of a light material, so that the airflow blown out from the second outlet 1041 of the return air channel 104 can drive the damper 5 to turn upward, and the damper 5 closes the third inlet 1051 of the defrosting duct 105 through the first damper portion 51. The V-shaped structure of the damper 5 also enables the damper 5 to close the second outlet 1041 of the return air passage 104 through the second damper portion 52 under the action of its own weight.

The operation of the air-cooling type refrigerator according to the present invention will be briefly explained with reference to fig. 1 and 2.

As shown in fig. 1, when the air-cooling type refrigerator is operated in the cooling mode, the axial flow fan 3 is rotated in the normal direction and drives air to flow in the direction indicated by the arrow in fig. 1. The damper 5 is turned upward by the air flow to a first position where the first damper portion 51 closes the third air inlet 1051 of the defrosting duct 105 and opens the second air outlet 1041 of the return air passage 104. At this time, the circulation path of the airflow is: the refrigerating compartment 101 → the axial flow fan 3 → the cooling duct 103 → the storage compartment 102 → the return air duct 104 → the refrigerating compartment 101.

As shown in fig. 2, when the air-cooling type refrigerator is operated in the defrosting mode, the axial flow fan 3 is reversed and drives the air to flow in the direction indicated by the arrow in fig. 2. The damper 5 is turned downward by its own weight and the air flow to a second position where the second damper portion 52 closes the second outlet 1041 of the return air passage 104, and the third inlet 1051 of the defroster duct 105 is opened. At this time, the circulation path of the airflow is: the cooling compartment 101 → the defrosting air duct 105 → the axial flow fan 3 → the cooling compartment 101.

As will be understood by those skilled in the art, since the damper 5 can be turned downward under its own weight to the second position (as shown in fig. 2) where the second damper portion 52 closes the second outlet 1041 of the return air duct 104, when the axial flow fan 3 starts to rotate forward, part of the air flow still flows in the defrosting circulation duct, except that the circulation path of the air flow is: cooling compartment 101 → axial fan 3 → defrosting duct 105 → cooling compartment 101. As the rotational speed of the axial flow fan 3 increases, and as the air pressure in the return air passage 104 increases, the damper 5 is forced to turn upward until the damper 5 turns to the first position shown in fig. 1. Therefore, the air-cooled refrigerator of the present invention requires that the axial flow fan 3 cannot be lower than a certain rotation speed when rotating forward, otherwise the damper 5 cannot be turned over to the first position shown in fig. 1, resulting in waste of cooling capacity (a part of air flows in the defrosting circulation air passage). The certain rotating speed can be used for observing the posture of the air door 5 by gradually increasing the rotating speed of the axial flow fan 3 in the forward rotation process at the beginning of the design of the air-cooled refrigerator, and the rotating speed for forcing the air door 5 to turn to the first position shown in figure 1 is taken as the certain rotating speed.

Based on the foregoing description, it can be understood by those skilled in the art that the present invention enables the damper 5 to close the third air inlet 1051 of the defrosting air duct 105 or the second air outlet 1041 of the return air duct 104 by forward/reverse rotation of the axial flow fan 3, so that the damper 5 closes the defrosting circulation air path or the refrigeration circulation air path; when the axial flow fan 3 rotates forwards, air can be driven to flow in the refrigeration circulation air path, and the refrigeration function of the air-cooled refrigerator is ensured; and when the axial flow fan 3 rotates reversely, the air can be driven to flow in the defrosting circulation air passage, so that the evaporator 2 of the air-cooled refrigerator is defrosted in an auxiliary manner. In short, the invention can refrigerate or defrost the air-cooled refrigerator only by controlling the forward and reverse rotation of the axial flow fan 3, and the control logic is simple.

In addition, in order to prevent the high-temperature air in the cooling compartment 101 from entering the storage chamber 102 during defrosting, in other embodiments of the present invention, a person skilled in the art may increase the rotation speed of the axial flow fan 3 during reverse rotation as the temperature in the cooling compartment 101 increases, as needed. As can be understood by those skilled in the art, as the rotation speed of the axial flow fan 3 increases, the flow rate of the air in the defrosting circulation air path also increases, so that the negative pressure at the upstream of the axial flow fan 3 and in the cooling air duct 103 increases, and the air pressure in the cooling air duct 103 is slightly lower than the air pressure in the storage chamber 102, thereby effectively preventing the high-temperature air from entering the storage chamber 102, and further preventing the temperature of the storage chamber 102 from increasing.

So far, the technical solution of the present invention has been described in connection with the foregoing embodiments, but it is easily understood by those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Without departing from the technical principle of the present invention, a person skilled in the art may split and combine the technical solutions in the above embodiments, and may make equivalent changes or substitutions for related technical features, and any changes, equivalents, improvements, etc. made within the technical concept and/or technical principle of the present invention will fall within the protection scope of the present invention.

Claims

1. An air-cooled refrigerator comprises a refrigerator body, an evaporator, an axial flow fan and an air door which is pivotally connected with the refrigerator body,

the refrigerator body is limited with a refrigerating chamber, a storage chamber, a refrigerating air channel, an air return channel and a defrosting air channel,

the refrigerating chamber, the axial flow fan, the refrigerating air duct, the storage chamber and the return air channel are sequentially communicated end to form a refrigerating circulation air path;

the refrigerating chamber, the defrosting air duct and the axial flow fan are sequentially communicated end to form a defrosting circulation air path;

the air inlet of the defrosting air channel is arranged close to the air outlet of the air return channel, and the air door is used for selectively sealing the air inlet of the defrosting air channel and the air outlet of the air return channel;

when the axial flow fan rotates forwards, the air is driven to enable the air door to rotate to a first position for closing the air inlet of the defrosting air channel, and the air flowing through the refrigerating chamber flows in the refrigerating circulation air path;

and when the axial flow fan rotates reversely, the air is driven to enable the air door to rotate to a second position for sealing the air outlet of the air return channel, and the air flowing through the refrigerating chamber flows in the defrosting circulation air path.

2. The air-cooled refrigerator according to claim 1,

the air door comprises a first air door part, a second air door part and a pivoting part positioned between the first air door part and the second air door part,

the first air door part is used for sealing the air inlet of the defrosting air channel, the second air door part is used for sealing the air outlet of the return air channel, and the air doors are in pivot connection with the refrigerator body through the pivot parts.

3. The air-cooling type refrigerator according to claim 2,

the air inlet of the defrosting air channel is positioned on the upper side of the air outlet of the air return channel, so that the air door passes through the second air door part under the action of self gravity to seal the air outlet of the air return channel.

4. The air-cooling type refrigerator according to claim 3,

the size of the air inlet of the defrosting air channel is smaller than that of the air outlet of the air return channel; and/or the like, and/or,

the extension surface of the first air door part is smaller than that of the second air door part.

5. The air-cooled refrigerator according to any one of claims 1 to 4,

the air door is of a V-shaped sheet structure made of light materials.

6. The air-cooled refrigerator according to any one of claims 1 to 4,

the axial flow fan is configured such that the rotational speed at the time of reverse rotation becomes greater as the temperature in the cooling chamber increases.

7. The air-cooled refrigerator according to any one of claims 1 to 4,

the air-cooled refrigerator further comprises a heating device which is arranged above the evaporator.

8. The air-cooled refrigerator according to claim 7,

the axial flow fan is obliquely arranged above the heating device.

9. The air-cooled refrigerator according to claim 8,

the top surface of the evaporator is obliquely arranged, so that the air blown out of the reversed axial flow fan is vertically blown to the top surface; and/or the like, and/or,

the heating device is parallel to the top surface of the evaporator.

10. The air-cooled refrigerator according to any one of claims 1 to 4,

the refrigerator body comprises an air duct cover plate, the refrigeration air duct and the defrosting air duct are formed on the air duct cover plate, and the air door is installed on the air duct cover plate.