CN115585610A

CN115585610A - Refrigerator

Info

Publication number: CN115585610A
Application number: CN202211406751.4A
Authority: CN
Inventors: 徐崇胜
Original assignee: Qingdao Haier Special Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Special Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-01-10

Abstract

The invention provides a refrigerator, which comprises a refrigerator body and a door body, wherein the refrigerator body is provided with a refrigeration chamber, an air channel and an air channel cover plate, a first shelf is arranged in the refrigeration chamber, one end of the first shelf, which is close to the door body, is provided with a first air baffle, and the first air baffle is provided with a first position for enabling cold air in the refrigeration chamber to flow up and down and a second position for enabling cold air in the refrigeration chamber to be separated up and down; the air duct cover plate is provided with an air outlet and an air return inlet, and the upper side and the lower side of the first shelf are both provided with air outlets; at least one second air baffle is arranged in the air channel, the second air baffle comprises a third position enabling cold air to flow through the air channel and a fourth position blocking the cold air to flow through the air channel, and the second air baffle is arranged between the air outlets formed in the upper side and the lower side of the first shelf. The refrigeration space in the refrigeration room is reduced through the matching of the first wind shield and the second wind shield, and the refrigeration speed of the area is accelerated.

Description

Refrigerator

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to a refrigerator.

Background

The existing vertical refrigerated cabinet product is generally designed to have the internal temperature of 0-10 ℃, the air duct span in the vertical direction is large, basically, the problems of uneven indoor temperature and large vertical temperature difference exist in a refrigerating chamber, and the temperature difference between a top layer and a bottom layer is 7-8 ℃. In addition, in order to reduce cost and energy consumption, most of merchants cause the reduction speed of the indoor temperature of the refrigerating room of most of vertical refrigerated cabinets to be slow, and for some beverage beer cabinets in the market, the air heat load of the cabinet body is large due to the fact that the number of purchases of customers is large in the peak period of people flow and the doors are frequently opened and closed, and the merchants frequently replenish goods, so that the whole heat load is always in a high state. Particularly in certain popular areas (e.g., areas where the second or third tier of the cabinet is in the center of the consumer's line of sight or is readily accessible) where beverage replacement is relatively fast, and thus, many customers complain of slow pull down of the refrigerated merchandiser.

Disclosure of Invention

The invention aims to provide a refrigerator, wherein a shelf in a refrigerating chamber of the refrigerator is provided with a wind shield which can partition the refrigerating chamber into an upper area and a lower area, and the wind shield is also arranged in an air duct, so that cold air only flows to the area above or below a shelf, the refrigerating area is reduced, the cooling rate of the area is accelerated, and the problem of low temperature pull-down speed in the refrigerator in the prior art is solved.

In order to achieve one of the above purposes, an embodiment of the present invention provides a refrigerator, including a box body and a door body, where the box body is formed with a refrigeration compartment and an air duct located at the rear side of the refrigeration compartment, the air duct and the refrigeration compartment are separated by an air duct cover plate, a first shelf is arranged in the refrigeration compartment, one end of the first shelf, which is close to the door body, is formed with a first air baffle, and the first air baffle has a first position where cold air in the refrigeration compartment flows up and down and a second position where the cold air in the refrigeration compartment is partitioned up and down; the air duct cover plate is provided with at least two air outlets and an air return port positioned at the top or the bottom of the air duct cover plate, and the air outlets are arranged on the upper side and the lower side of the first shelf; the air duct is internally provided with at least one second air baffle, the second air baffle comprises a third position enabling cold air to circulate in the air duct and a fourth position blocking the cold air from circulating in the air duct, and the second air baffle is arranged between the air outlets formed in the upper side and the lower side of the first shelf.

As a further improvement of the embodiment of the present invention, the air return opening is disposed at the top of the air duct cover plate, and the freezer further includes a second shelf, and the second shelf is disposed above the air outlet on the upper side of the first shelf.

As a further improvement of the embodiment of the present invention, at least one middle shelf is disposed between the first shelf and the second shelf, the first wind deflector is disposed at one end of each middle shelf close to the door body, and the air outlets are disposed between the middle shelf and the middle shelf, between the middle shelf and the first shelf, and between the middle shelf and the second shelf.

As a further improvement of an embodiment of the present invention, the second wind deflector is disposed between every two spaced air outlets.

As a further improvement of an embodiment of the present invention, the air outlet below each middle shelf is provided with a damper, so that the air outlet below the middle shelf is opened or closed.

As a further improvement of an embodiment of the present invention, at least one hollowed shelf is disposed below the first shelf, and the air outlet is disposed below each hollowed shelf.

As a further improvement of an embodiment of the present invention, the air conditioner further includes an evaporator disposed in the air duct, and a highest point of the evaporator is not lower than an air outlet below the second shelf.

As a further improvement of the embodiment of the present invention, the air return opening is disposed at the bottom of the air duct cover plate, and the freezer further includes a third shelf disposed below the air outlet on the lower side of the first shelf.

As a further improvement of the embodiment of the present invention, at least one middle shelf is disposed between the first shelf and the third shelf, the first wind deflector is disposed at one end of each middle shelf close to the door body, and the air outlets are disposed between the middle shelf and the middle shelf, between the middle shelf and the first shelf, and between the middle shelf and the third shelf.

As a further improvement of the embodiment of the present invention, the second wind deflector is arranged between every two air outlets arranged at intervals.

As a further improvement of an embodiment of the present invention, the air outlet above each middle shelf is provided with a damper, so that the air outlet above the middle shelf is opened or closed.

As a further improvement of an embodiment of the present invention, at least one hollowed-out shelf is disposed above the first shelf, and the air outlet is disposed above each hollowed-out shelf.

As a further improvement of an embodiment of the present invention, the air conditioner further includes an evaporator disposed in the air duct, and a lowest point of the evaporator is not higher than an air outlet above the third shelf.

One or more technical schemes provided by the invention at least have the following technical effects or advantages:

the shelf is arranged in the refrigerating chamber, the wind shield is arranged at one end of the shelf close to the door body, the refrigerating chamber can be divided into an upper area and a lower area, cold air in the refrigerating chamber is separated, the wind shield is also arranged between the air outlets in the air duct, and the wind shield in the air duct can only blow out cold air from one of the air outlets, so that the cold air can only circulate in the upper half area or the lower half area of the refrigerating chamber, the refrigerating area is reduced, the refrigerating speed is accelerated, and the wind shield on the shelf and the wind shield in the air duct can be opened after the temperature is reduced to a target temperature to restore normal refrigeration of the refrigerator. The refrigerator provided by the invention can realize rapid refrigeration of a small area in the refrigerator, solves the problem of slow overall temperature reduction speed in the refrigerator, and meets the market demand.

Drawings

Fig. 1 is a side sectional view of a cooler in accordance with a first embodiment of the present invention.

Fig. 2 is a state diagram of a refrigerator according to an embodiment of the present invention.

Fig. 3 is another state diagram of a cooler in accordance with an embodiment of the present invention.

Fig. 4 is a side sectional view of a cooler in a second embodiment of the present invention.

Fig. 5 is a state diagram of a second refrigerator according to an embodiment of the present invention.

Fig. 6 is another state diagram of a refrigerator according to the second embodiment of the present invention.

1. A refrigeration compartment; 2. an air duct; 21. a second wind deflector; 3. an air duct cover plate; 31. an air outlet; 32. an air return opening; 4. a first shelf; 41. a first windshield; 5. a second shelf; 6. a middle shelf; 7. a third shelf; 8. hollowing out the shelf; 9. an evaporator.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

As used herein, terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, denote the relative position in space, and are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Also, it should be understood that, although the terms first, second, etc. may be used herein to describe various elements or structures, these described elements should not be limited by these terms. These terms are only used to distinguish these descriptive objects from one another. For example, the first wind deflector may be referred to as the second wind deflector, and similarly the second wind deflector may also be referred to as the first wind deflector, without departing from the scope of protection of the present application.

Example 1

The embodiment 1 of the invention provides a refrigerator, which comprises a refrigerator body and a door body, and is shown in a schematic side sectional view of the refrigerator as in figures 1-3, wherein the refrigerator body is provided with a refrigeration chamber 1 and an air duct 2 positioned at the rear side of the refrigeration chamber 1, the air duct 2 and the refrigeration chamber 1 are separated by an air duct cover plate 3, a first shelf 4 is arranged in the refrigeration chamber 1, one end of the first shelf 4, which is close to the door body, is provided with a first wind shield 41, and the first wind shield 41 is provided with a first position for enabling cold air in the refrigeration chamber 1 to flow up and down and a second position for enabling the cold air in the refrigeration chamber 1 to be separated up and down; the air duct cover plate 3 is provided with at least two air outlets 31 and an air return inlet 32 positioned at the top or the bottom of the air duct cover plate 3, and the air outlets 31 are arranged on the upper side and the lower side of the first shelf 4; at least one second air baffle 21 is arranged in the air duct 2, the second air baffle 21 comprises a third position enabling cold air to flow through the air duct 2 and a fourth position blocking the cold air to flow through the air duct 2, and the second air baffle 21 is arranged between the air outlets 31 arranged on the upper side and the lower side of the first shelf 4.

In this embodiment, the air outlet 31 is disposed at the top of the air duct cover plate 3, that is, the air supply mode of this embodiment is downward air outlet and upward air return. Based on this, when the small region refrigeration is needed, the first air baffle 41 at one end of the first shelf 4 close to the door body is arranged at the second position (closed), the second air baffle 21 in the air duct 2 is arranged at the fourth position (closed), at the moment, cold air is blocked by the second air baffle 21 in the air duct 2, the cold air can only be blown out to the refrigerating chamber 1 from the air outlet 31 at the upper side of the first shelf 4, the cold air is blocked by the first air baffle 41 in the refrigerating chamber 1 and can not sink along with gravity, the cold air can only circulate in the region above the first shelf 4, and the cold air returns to the air duct 2 from the air return opening 32 at the top of the air duct cover plate 3. When the temperature of the area above the first shelf 4 reaches the target temperature, the first air deflector 41 and the second air deflector 21 can be opened to the first position (open) and the third position (open), and the cooling in the cooling compartment 1 is returned to the normal mode.

Furthermore, a second shelf 5 is arranged above the air outlet 31 on the upper side of the first shelf 4, and the second shelf 5 prevents cold air blown out from the air outlet 31 on the upper side of the first shelf 4 from directly flowing upwards to the air return inlet 32 at the top to return to the air duct 2, but needs to flow towards the direction of the door body, and can flow upwards from the gap between the second shelf 5 and the door body, so that the arrangement mode reduces the space area during small-area refrigeration on one hand, and the refrigeration speed between the first shelf 4 and the second shelf 5 is higher; on the other hand, in the depth direction of the refrigerator, the cold air has to flow towards the door body and upwards flow from the gap between the front end of the second shelf 5 and the door body, so that the cold air flows through all the areas between the first shelf 4 and the second shelf 5, and the cold quantity is more uniform.

The first shelf 4 and the second shelf 5 divide the refrigerating chamber 1 into three temperature areas from top to bottom, wherein the area between the first shelf 4 and the second shelf 5 is a rapid cooling area, the lower part of the first shelf 4 is a low-temperature area, and the upper part of the second shelf 5 is a common cooling area.

Furthermore, at least one middle shelf 6 is disposed between the first shelf 4 and the second shelf 5, and in this embodiment, only one middle shelf 6 is disposed, but the number of the middle shelves 6 in the present invention is not limited, and may be one, or two or more.

The first wind shield 41 is also arranged at one end of the middle-layer shelf 6 close to the door body, and can be opened (at a first position) and closed (at a second position) in the same way, the air outlet 31 is arranged below the middle-layer shelf 6, the air outlet 31 can be arranged close to the bottom surface of the middle-layer shelf 6, or can be arranged at a distance from the bottom surface of the middle-layer shelf 6, or can be understood as that the air outlet 31 is arranged between the two shelves, namely the air outlets 31 are arranged between the middle-layer shelf 6 and the middle-layer shelf 6, between the middle-layer shelf 6 and the first shelf 4, and between the middle-layer shelf 6 and the second shelf 5.

The rapid cooling area is continuously divided into smaller areas by the plurality of middle-layer shelves 6, so that the storage area can be increased, and more articles needing rapid cooling can be placed.

A second wind shield 21 is arranged between every two wind outlets 31 arranged at intervals in the wind channel 2, the first wind shield 41 on one middle shelf 6 is closed, and meanwhile, the second wind shield 21 between the middle shelf 6 and a shelf above the middle shelf (the middle shelf 6 or the second shelf 5) is closed, so that a rapid cooling area above the middle shelf 6 can enter rapid refrigeration.

Or, a damper is arranged at the air outlet 31 below each middle shelf 6, the first air baffle 41 of one middle shelf 6 is controlled to be closed, and meanwhile, the damper at the air outlet 31 between the middle shelf 6 and the shelf below the middle shelf (the middle shelf 6 or the first shelf 4) is controlled to be closed, so that the rapid cooling area above the middle shelf 6 can enter rapid cooling.

The two modes can selectively control the rapid cooling interval in the rapid cooling area, and the smaller the rapid cooling interval is, the faster the cooling speed is, and the energy consumption can also be reduced.

In this embodiment, since only one middle shelf 6 is provided, and the air door is provided at the air outlet 31 below the middle shelf 6, the second air baffle 21 between the middle shelf 6 and the second shelf 5 can be eliminated, when it is required to rapidly cool the area between the middle shelf 6 and the second shelf 5, as shown in fig. 2, the first air baffle 41 on the middle shelf 6 is closed, and at the same time, the air door of the air outlet 31 below the middle shelf 6 and the second air baffle 21 between the middle shelf 6 and the first shelf 4 are closed, so that the cold air in the air duct 2 can only be blown out from the air outlet 31 above the middle shelf 6, and under the blocking of the first air baffle 41 on the middle shelf 6, the cold air can only flow upward through the gap between the second shelf 5 and the door body, and can return to the air duct 2 from the air return opening 32 at the top.

When the rapid cooling area between the first shelf 4 and the second shelf 5 performs rapid cooling, as shown in fig. 3, the first wind deflector 41 on the first shelf 4 is closed, and the second wind deflector 21 between the first shelf 4 and the middle shelf 6 is closed at the same time, so that the cold air in the air duct 2 can be blown out from the air outlet 31 between the first shelf 4 and the middle shelf 6 and the air outlet 31 between the second shelf 5 and the middle shelf 6, and flows upwards through the air return opening 32 at the top to return to the air duct 2.

Further, 4 below of first shelf can set up at least one

fretwork shelf

8, and 8 below of fretwork shelf are provided with air outlet 31, and the setting of fretwork shelf can increase the thing area of putting of low temperature zone on the one hand, and on the other hand, the structure of fretwork makes the temperature distribution in the low temperature zone comparatively even.

Further, an evaporator 9 is further disposed in the air duct 2, and since the present embodiment is a circulation mode of downward air outlet and upward air return, a highest point of the evaporator 9 cannot be lower than a highest air outlet 31, which is the air outlet 31 below the second shelf 5 in the present embodiment.

Example 2

The embodiment 2 of the invention provides a refrigerator, which comprises a refrigerator body and a door body, and is shown as a schematic side sectional view of the refrigerator in figures 4-6, wherein the refrigerator body is provided with a refrigeration chamber 1 and an air duct 2 positioned at the rear side of the refrigeration chamber 1, the air duct 2 and the refrigeration chamber 1 are separated by an air duct cover plate 3, a first shelf 4 is arranged in the refrigeration chamber 1, one end of the first shelf 4, which is close to the door body, is provided with a first wind shield 41, and the first wind shield 41 is provided with a first position for enabling cold air in the refrigeration chamber 1 to flow up and down and a second position for enabling the cold air in the refrigeration chamber 1 to be separated up and down; the air duct cover plate 3 is provided with at least two air outlets 31 and an air return inlet 32 positioned at the top or the bottom of the air duct cover plate 3, and the air outlets 31 are arranged on the upper side and the lower side of the first shelf 4; at least one second air baffle 21 is arranged in the air duct 2, the second air baffle 21 comprises a third position enabling cold air to flow through the air duct 2 and a fourth position blocking the cold air to flow through the air duct 2, and the second air baffle 21 is arranged between the air outlets 31 arranged on the upper side and the lower side of the first shelf 4.

In this embodiment, the air outlet 31 is disposed at the bottom of the air duct cover plate 3, that is, the air supply mode of this embodiment is upward air-out and downward air-return. Based on this, when the small region refrigeration is needed, the first air baffle 41 at one end of the first shelf 4 close to the door body is arranged at the second position (closed), the second air baffle 21 in the air duct 2 is arranged at the fourth position (closed), at the moment, cold air is blocked by the second air baffle 21 in the air duct 2, the cold air can only be blown out to the refrigerating chamber 1 from the air outlet 31 at the lower side of the first shelf 4, the cold air is blocked by the first air baffle 41 in the refrigerating chamber 1 and can not be blown upwards along with the wind direction, the cold air can only circulate in the region below the first shelf 4, and the cold air returns to the air duct 2 from the air return opening 32 at the bottom of the air duct cover plate 3. When the temperature of the area under the first shelf 4 reaches the target temperature, the first wind deflector 41 and the second wind deflector 21 can be opened to the first position and the third position, and the cooling in the cooling compartment 1 is returned to the normal mode.

Furthermore, a third shelf 7 is arranged below the air outlet 31 on the lower side of the first shelf 4, and the third shelf 7 enables cold air blown out from the air outlet 31 on the lower side of the first shelf 4 not to sink to the bottom of the refrigeration compartment 1 along with gravity and return to the air duct 2 from the air return inlet 32, but needs to flow towards the door body direction and can flow downwards from a gap between the third shelf 7 and the door body, so that the setting mode reduces a space area during small-area refrigeration on one hand, and enables the refrigeration speed between the first shelf 4 and the third shelf 7 to be higher; on the other hand, in the depth direction of the refrigerator, the cold air must flow towards the door body and flow downwards from the gap between the front end of the third shelf 7 and the door body, so that the cold air flows through all the areas between the first shelf 4 and the third shelf 7, and the cold quantity is more uniform.

The first shelf 4 and the third shelf 7 divide the refrigerating chamber 1 into three temperature areas from top to bottom, wherein the area between the first shelf 4 and the third shelf 7 is a rapid cooling area, a low-temperature area is arranged above the first shelf 4, and a common cooling area is arranged below the third shelf 7.

Furthermore, at least one middle shelf 6 is disposed between the first shelf 4 and the third shelf 7, and in this embodiment, only one middle shelf 6 is disposed, but the number of the middle shelves 6 in the present invention is not limited, and may be one, or two or more.

The first wind shield 41 is also arranged at one end of the middle shelf 6 close to the door body, and can be opened (first position) and closed (second position) as well, the air outlet 31 is arranged above the middle shelf 6, the air outlet 31 can be arranged close to the top surface of the middle shelf 6, and can also be arranged at intervals with the top surface of the middle shelf 6, or the air outlet 31 can be arranged between the two shelves, namely, the air outlets 31 are arranged between the middle shelf 6 and the middle shelf 6, between the middle shelf 6 and the first shelf 4, and between the middle shelf 6 and the third shelf 7.

The rapid cooling area is continuously divided into smaller areas by the multi-layer middle-layer shelf 6, so that the storage area can be increased, and more articles needing rapid cooling can be placed.

A second wind deflector 21 is arranged between every two wind outlets 31 arranged at intervals in the wind channel 2, the first wind deflector 41 on one middle shelf 6 is closed, and meanwhile, the middle shelf 6 and the shelf (the middle shelf 6 or the third shelf 7) below the middle shelf 21 are closed, so that a rapid cooling area below the middle shelf 6 can enter rapid cooling.

Or, a damper is arranged at the air outlet 31 above each middle shelf 6, the first air baffle 41 of one middle shelf 6 is controlled to be closed, and meanwhile, the damper at the air outlet 31 between the middle shelf 6 and the shelf above the middle shelf (the middle shelf 6 or the first shelf 4) is controlled to be closed, so that the rapid cooling area below the middle shelf 6 can also enter rapid cooling.

In this embodiment, since only one middle shelf 6 is provided, and the air door is provided at the air outlet 31 above the middle shelf 6, the second air baffle 21 between the middle shelf 6 and the third shelf 7 can be eliminated, when it is required to rapidly cool the area between the middle shelf 6 and the third shelf 7, as shown in fig. 5, the first air baffle 41 on the middle shelf 6 is closed, and at the same time, the air door of the air outlet 31 above the middle shelf 6 and the second air baffle 21 between the middle shelf 6 and the first shelf 4 are closed, so that the cold air in the air duct 2 can only be blown out from the air outlet 31 below the middle shelf 6, and under the blocking of the first air baffle 41 on the middle shelf 6, the cold air can only flow downward through the gap between the third shelf 7 and the door body, and can return to the air duct 2 from the air return opening 32 at the bottom.

When the rapid cooling area between the first shelf 4 and the third shelf 7 is rapidly cooled, as shown in fig. 6, the first air baffle 41 on the first shelf 4 is closed, and the second air baffle 21 between the first shelf 4 and the middle shelf 6 is closed at the same time, so that the cold air in the air duct 2 can be blown out from the air outlet 31 between the first shelf 4 and the middle shelf 6 and the air outlet 31 between the third shelf 7 and the middle shelf 6, and then flows downwards through the air return opening 32 at the bottom and returns into the air duct 2.

Further, at least one hollowed-out shelf 8 can be arranged above the first shelf 4, an air outlet 31 is arranged above the hollowed-out shelf 8, the arrangement of the hollowed-out shelf can increase the storage area of the low-temperature area, and the hollowed-out structure enables the temperature distribution in the low-temperature area to be uniform.

Further, an evaporator 9 is further disposed in the air duct 2, and since the present embodiment is a circulation mode of downward air-out and upward air-return, the lowest point of the evaporator 9 cannot be higher than the lowest air outlet 31, which is the air outlet 31 above the third shelf 7 in the present embodiment.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A refrigerator comprises a box body and a door body, wherein a refrigeration chamber and an air duct positioned at the rear side of the refrigeration chamber are formed on the box body, the air duct and the refrigeration chamber are separated by an air duct cover plate,

a first shelf is arranged in the refrigerating chamber, a first wind shield is formed at one end of the first shelf close to the door body, and the first wind shield is provided with a first position enabling cold air in the refrigerating chamber to flow up and down and a second position enabling the cold air in the refrigerating chamber to be blocked up and down;

the air duct cover plate is provided with at least two air outlets and an air return port positioned at the top or the bottom of the air duct cover plate, and the air outlets are arranged on the upper side and the lower side of the first shelf;

at least one second air baffle is arranged in the air duct, the second air baffle comprises a third position enabling cold air to circulate in the air duct and a fourth position blocking the cold air to circulate in the air duct, and the second air baffle is arranged between the air outlets formed in the upper side and the lower side of the first shelf.

2. The refrigerator of claim 1 wherein the return air opening is disposed at the top of the air duct cover plate, the refrigerator further comprising a second shelf disposed above the air outlet on the first shelf.

3. The refrigerator of claim 2 wherein at least one middle shelf is disposed between the first shelf and the second shelf, the first wind deflector is disposed at one end of each middle shelf close to the door body, and the air outlets are disposed between the middle shelf and the middle shelf, between the middle shelf and the first shelf, and between the middle shelf and the second shelf.

4. The refrigerator of claim 3 wherein the second air baffle is positioned between every two spaced air outlets.

5. The refrigerator of claim 3 wherein the air outlet below each of the middle shelves is provided with a damper to open or close the air outlet below the middle shelf.

6. The refrigerator of claim 2 wherein at least one hollowed out shelf is provided below the first shelf, each said hollowed out shelf having said air outlet provided below.

7. The refrigerator of claim 2 further comprising an evaporator disposed within the air chute, the evaporator having a highest point no lower than an air outlet below the second shelf.

8. The refrigerator of claim 1 wherein the air return opening is disposed at a bottom of the air duct cover plate, the refrigerator further comprising a third shelf disposed below the air outlet opening at a lower side of the first shelf.

9. The refrigerator of claim 8 wherein at least one middle shelf is disposed between the first shelf and the third shelf, the first wind deflector is disposed at one end of each middle shelf close to the door body, and the air outlets are disposed between the middle shelf and the middle shelf, between the middle shelf and the first shelf, and between the middle shelf and the third shelf.

10. The refrigerator of claim 9 wherein the second air baffle is positioned between every two spaced air outlets.

11. The refrigerator of claim 9 wherein the air outlet above each of the middle shelves is provided with a damper to open or close the air outlet above the middle shelf.

12. The refrigerator of claim 8 wherein at least one hollowed out shelf is positioned above the first shelf, each hollowed out shelf having the air outlet positioned above it.

13. The cooler of claim 8, further comprising an evaporator disposed within the air duct, a lowest point of the evaporator being no higher than an air outlet above the third shelf.