WO2023065979A1

WO2023065979A1 - Refrigerating and freezing apparatus

Info

Publication number: WO2023065979A1
Application number: PCT/CN2022/121347
Authority: WO
Inventors: 崔展鹏; 陈建全; 王少一; 姬立胜
Original assignee: 重庆海尔制冷电器有限公司; 青岛海尔电冰箱有限公司; 海尔智家股份有限公司
Priority date: 2021-10-22
Filing date: 2022-09-26
Publication date: 2023-04-27
Also published as: CN116007270A

Abstract

A refrigerating and freezing apparatus, comprising: an evaporator (50), a storage compartment (11), and a storage apparatus (20) arranged in the storage compartment, wherein the storage apparatus is provided with an apparatus air supply opening (21) and an air return opening (22) exposed to the storage compartment; an air supply damper (30), arranged on a path between the evaporator and the apparatus air supply opening, or at the air supply opening; a circulating air path (40), arranged at the periphery of the storage apparatus in a surrounding mode; and a circulating fan (60), arranged in the circulating air path, wherein when the air supply damper (30) is closed, the circulating fan is started to promote an air flow to form an air curtain at the outer side of the apparatus air return opening so as to provide an independent space for the storage apparatus.

Description

Freezer

technical field

The invention relates to refrigeration and freezing technology, in particular to a refrigeration and freezing device.

Background technique

As refrigerators and other refrigerating and freezing devices penetrate into people's daily life, users have higher and higher requirements for the quality of food preservation of such refrigerating and freezing devices. For example, the user wishes to set up a special area in the refrigeration and freezing device for storing fruits and vegetables with high water content, so as to improve the preservation effect of fruits and vegetables and prevent the water loss of fruits and vegetables. For another example, the user also wishes to set up a special area for storing dry goods such as treasures and tea in the refrigerating and freezing device, so as to prevent the dry goods from being damp and deteriorating. For another example, in order to avoid the waste of storage space, the user also hopes that a certain area in the refrigerating and freezing device can be switched between the moisturizing mode for storing fruits and vegetables and the drying mode for storing dry goods, so as to flexibly choose its function mode, In this way, food materials with different humidity requirements can be selectively preserved.

In order to meet the above-mentioned needs of users, in the prior art, drawers with adjustable dryness and wetness are arranged in the refrigerator compartment of the refrigerator-freezer. This kind of refrigerating and freezing device usually realizes the drying function by inputting the cooling airflow flowing through the evaporator into the drawer, and correspondingly, the drawer is provided with an air supply port and an air return port. When the drawer needs moisturizing, the cooling air flow is no longer needed in the drawer. At this time, the prior art usually prevents the cooling air flow from continuing to enter the drawer by closing the air supply damper at the air supply port, but ignores the air return port of the drawer. The air outlet is directly exposed to the refrigerator, and the return air of the refrigerator enters the drawer through the return air outlet of the drawer and affects the temperature and humidity in the drawer.

Contents of the invention

An object of the present invention is to overcome at least one defect of the prior art, to provide a refrigerating and freezing device having an independent storage space and the humidity of the storage space is not affected by the storage compartment.

Another object of the present invention is to reduce the cost of the refrigerator and simplify the control logic of the refrigerator.

In order to achieve the above object, the present invention provides a refrigerating and freezing device, comprising a storage compartment for storing items, an evaporator for providing cooling airflow, and further comprising:

The storage device is arranged in the storage compartment, and has a device air supply port for air flow into it and a device air return port for the air flow in it to flow out, and the device air return port is exposed to the storage in the room

an air supply damper disposed at the device air supply port or on the air flow path between the evaporator and the device air supply port and configured to be controlled to open to allow cooling airflow into the storage device internal or controlled closure to prevent cooling air flow from entering said storage device;

A circulating air path is arranged outside the storage device, and a part of the circulating air path is outside the air return port of the device; and

A circulating fan is arranged in the circulating air path and is configured to be activated in a controlled manner when the air supply door is closed, so as to promote the circulation of the airflow along the circulating air path, thereby forming a wind curtain.

Optionally, the circulation fan is set such that the air flow direction of the formed air curtain is the same as the air flow direction in the storage compartment outside the air curtain.

Optionally, the device air supply port is formed on the rear side of the storage device, and the device air return port is formed on the front side of the storage device.

Optionally, the circulating air path surrounds the storage device along the front-rear direction and the vertical direction, and includes a first air path section above the storage device and a second air path section in front of the storage device , the third wind path section below the storage device and the fourth wind path section behind the storage device, the first wind path section, the second wind path section, the third wind path section and the The fourth wind section is connected successively;

The second air path section is located in front of the return air outlet of the device.

Optionally, the storage compartment has a compartment air supply port and a compartment air return port, and the compartment return air port is adjacent to the bottom of the storage compartment; and

The airflow direction of the storage compartment in the area in front of the second air path section is vertically downward, and the circulation fan is configured to encourage the airflow to flow through the second airflow in a vertically downward direction. road section.

Optionally, the circulating air is defined by inner and outer coamings arranged inside and outside; and

Both the inner wall and the front of the outer wall are provided with gaps, so that the air return port of the device passes through the gap between the inner wall and the outer wall and the storage space. room connected.

Optionally, the entire air return port of the device extends vertically; and

The positions and lengths of the gaps in the vertical direction of the inner wall and the outer wall are respectively matched with the vertical position and length of the air return port of the device .

Optionally, the top of the storage device is provided with a moisture-permeable membrane that allows moisture inside to leak out; and

The inner wall is spaced apart from the top of the storage device to form a moisture-permeable space above the moisture-permeable membrane; or, the upper section of the inner wall and the storage device The top of the device is adjacent to or close to, and the upper section of the inner wall is provided with a see-through window above the moisture-permeable membrane to allow the moisture-permeable membrane to be exposed to the circulating air path.

Optionally, the storage device has a drying mode and a moisturizing mode with different preset humidity ranges; and

The supply damper is configured to controllably open or close when the storage unit is in a dry mode to selectively allow cooling airflow generated by the evaporator to flow into the storage unit, within the storage unit Controlled closure to prevent the cooling air flow from flowing into the storage device when in the moisturizing mode.

Optionally, the evaporator is disposed in an evaporator chamber located behind the storage compartment; and

The evaporator chamber communicates with the storage compartment through the air supply duct of the compartment, and communicates with the storage device through the air supply duct of the device, and the air supply duct of the compartment communicates with the device for air supply. The air ducts are independent of each other, and the air supply door is arranged at the end of the air supply air duct of the device adjacent to the evaporator chamber.

The refrigerating and freezing device of the present invention includes a storage compartment, an evaporator, a storage device arranged in the storage compartment, and an air supply door for selectively allowing cooling airflow to enter the storage device, so as to pass through the air supply air door The opening and closing control realizes independent dry and wet adjustable storage space in the storage device. In particular, the refrigerating and freezing device also includes a circulating air path outside the storage device and a circulating fan arranged in the circulating air path, and a part of the circulating air path is outside the air return port of the storage device The side of the air return outlet of the device facing the storage compartment). When the air supply damper is closed, the cooling air flow no longer enters the storage device, and the air return port of the device no longer flows out, and it is not expected that the air in the storage compartment enters the storage device through the return air port of the device. At this time, turning on the circulating fan can form an air curtain outside the air return port of the device. The air curtain forms a barrier between the air return port of the device and the storage compartment. All the air will not enter the storage device through the air return port of the device. Therefore, the humidity of the adjustable storage space defined in the storage device will not be affected by the storage compartment.

Furthermore, when faced with the problem of how to prevent the storage compartment from having an impact on the humidity in the storage device through the air return port of the device, the inventor realized that a return air damper can be added at the air return port of the device. However, the increase of the return air damper will not only increase the cost, but also the return air damper is small in size and difficult to assemble, which affects production efficiency. Most importantly, the return air damper needs to be precisely controlled, which increases the burden on the control logic . For this reason, the present invention devises a kind of solution that is completely different from damper principle in another way. The present invention utilizes an independent circulating air path and a circulating fan to prevent the air in the storage room from flowing to the return air port of the device by forming an air curtain outside the return air port of the device. The design idea is very novel and the effect is good.

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 schematic structural diagram of a refrigerating and freezing device according to one embodiment of the present invention;

Fig. 2 is a schematic enlarged view of part A in Fig. 1;

Fig. 3 is a schematic structural diagram of a circulating fan in an operating state according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a circulating fan in a stopped state according to an embodiment of the present invention;

Fig. 5 is a partial structural schematic diagram of a refrigerating and freezing device according to another embodiment of the present invention.

Detailed ways

The present invention provides a refrigerating and freezing device. FIG. 1 is a schematic structural diagram of a refrigerating and freezing device according to an embodiment of the present invention, and FIG. 2 is a schematic enlarged view of part A in FIG. 1 . Referring to FIG. 1 and FIG. 2 , the refrigerating and freezing device 1 of the present invention includes a box body 10 and an evaporator 50 for providing cooling airflow, and a storage compartment 11 is defined in the box body 10 . Specifically, the storage compartment 11 is preferably a refrigerated compartment with a refrigerated storage environment, and may also be other compartments capable of keeping fresh, such as a temperature-changing compartment.

The refrigerating and freezing device 1 further includes a storage device 20 and an air supply door 30 . The storage device 20 is arranged in the storage compartment 11, and has a device air supply port 21 for the airflow to flow into it and a device air return port 22 for the air flow therein to flow out, and the device return air port 22 is exposed to the storage room In the chamber 11 , that is to say, the air return port 22 of the device communicates with the storage compartment 11 . The air supply damper 30 is arranged at the air supply port 21 of the device or on the air flow path between the evaporator 50 and the air supply port 21 of the device, and is configured to be opened in a controlled manner to allow the cooling air flow to enter the storage device 20 or controlled. Closed to prevent the cooling air flow into the storage device 20. When the air supply damper 30 is opened, the cooling airflow generated by the evaporator 50 flows into the storage device 20, and the original air in the storage device 20 flows out through the air return port 22 of the device, and returns to the evaporator 50 through the storage compartment 11, thereby displacing The air in the storage device 20. When the air flow passes through the evaporator 50 with a lower temperature, the moisture in the air flow will condense on the evaporator 50, so that the temperature and humidity of the formed cooling air flow are relatively low. A dry storage space with low temperature and low humidity can be formed in the air storage device 20 . When the air supply damper 30 is closed, it can prevent the cooling air flow from flowing into the storage device 20. If the storage device 20 stores dry goods such as treasures and tea leaves, the closing of the air supply damper 30 can prevent the humidity in the storage device 20 from further increasing. reduce, avoid ineffective dehumidification or dry goods are too dry; if the storage device 20 stores items such as fruits and vegetables with a large water content, these items will evaporate a large amount of water after the air supply damper 30 is closed, making the storage device 20. A high-humidity space with high humidity is conducive to the preservation of fruits and vegetables and other items. Thus, an independent dry and wet adjustable storage space can be realized in the storage device 20 through the opening and closing control of the air supply damper 30 .

In particular, the refrigerating and freezing device 1 further includes a circulating air path 40 and a circulating fan 60 . Fig. 3 is a schematic structural diagram of a circulating fan in an operating state according to an embodiment of the present invention, and Fig. 4 is a schematic structural diagram of a circulating fan in a stopped state according to an embodiment of the present invention, among Fig. 3 and Fig. 4 The arrows in the indicate the approximate flow direction of the airflow. The circulating air passage 40 is disposed outside the storage device 20 , and a part of the circulating air passage 40 is located outside the air return port 22 of the device. The circulating fan 60 is arranged in the circulating air passage 40 and is configured to be activated in a controlled manner when the air supply door 30 is closed, so as to promote the airflow to circulate along the circulating air passage 40 to form an air curtain outside the return air outlet 22 of the device. It should be noted that the outside of the device air return port 22 is the side of the device return air port 22 facing the storage compartment 11 , and the inner side opposite to the outside of the device return air port 22 is the side of the device return air port 22 facing inside the storage device 20 . side.

When the air supply damper 30 is closed, the cooling air flow no longer enters the storage device 20, and no air flow flows out from the air return port 22 of the device, and the air flow in the storage compartment 11 is not expected to enter the storage device 20 through the air return port 22 of the device. Inside. At this time, turning on the circulation fan 60 can form an air curtain outside the air return port 22 of the device, and the air curtain forms a barrier between the air return port 22 of the device and the storage compartment 11, no matter whether the storage compartment 11 is supplying air for cooling or not. , the air in the storage compartment 11 will not enter the storage device 20 through the air return port 22 of the device. Impact.

When faced with the problem of how to prevent the storage compartment 11 from affecting the humidity in the storage device 20 through the device return air outlet 22 , the inventor realized that a return air damper can be added at the device return air outlet 22 . However, the increase of the return air damper will not only increase the cost, but also the return air damper is small in size and difficult to assemble, which affects production efficiency. Most importantly, the return air damper needs to be precisely controlled, which increases the burden on the control logic . For this reason, the present invention devises a kind of solution that is completely different from damper principle in another way. The present invention utilizes an independent circulating air path 40 and a circulating fan 60 to prevent the air in the storage compartment 11 from flowing to the return air port 22 of the device by forming an air curtain outside the return air port 11 of the device. The design idea is very novel and the effect is good .

In some embodiments, the storage device 20 may have a drying mode and a moisturizing mode with different preset humidity ranges. The air supply damper 30 is configured to be controlled to open or close when the storage device 20 is in the drying mode to selectively allow the cooling airflow generated by the evaporator 50 to flow into the storage device 20, and to be controlled when the storage device 20 is in the moisturizing mode. Controlled closed to prevent the cooling air flow into the storage device 20. When the storage device 20 is in the drying mode, it is used to store dry goods such as tea leaves and treasures. At this time, the air supply damper 30 is opened, and the cooling airflow flows into the storage device 20, and the humidity in the storage device 20 decreases. When the humidity in the storage device 20 drops to the minimum humidity threshold corresponding to the dry mode, the air supply damper 30 can be closed so that all the cooling air flows to the storage compartment 11 to ensure the cooling effect of the storage compartment 11 . When the humidity in the storage device 20 rises back above the maximum humidity threshold corresponding to the drying mode, the air supply damper 30 can be opened again. When the storage device 20 is in the moisturizing mode, it is used to store items with high water content such as fruits and vegetables. At this time, the air supply damper 30 is closed to form a relatively closed space in the storage device 20. The moisture increases the humidity in the storage device 20 to ensure the freshness of fruits and vegetables.

In some embodiments, the circulation fan 60 is set so that the airflow direction of the formed air curtain is the same as the airflow direction in the storage compartment 11 outside the air curtain. It can be understood that, since some sections of the circulating air duct 40 are outside the air return port 22 of the device, the air curtain formed is also outside the air return port 22 of the device, that is, the air return port 22 of the device is located on the inside of the air curtain, and the air curtain The side away from the air return port 22 of the device is the outside of the air curtain, and the outside of the air curtain is still the space of the storage compartment 11. That is to say, when the storage compartment 11 is blown and cooled, an air flow is formed in the storage compartment 11, and the air flow direction outside the air curtain in the storage compartment 11 is the same as the air flow direction of the air curtain. Avoid counterflow or cross flow between the airflow forming the air curtain and the airflow in the storage compartment 11 to affect the normal flow of the two airflows, so as to ensure the normal formation of the air curtain and the normal airflow in the storage compartment 11.

In some embodiments, the device air outlet 21 is formed on the rear side of the storage device 20 to facilitate input of cooling airflow into the storage device 20 and simplify the air duct structure. Preferably, the device air outlet 21 may be formed on the upper part of the rear side of the storage device 20 so as to make the distribution of the cooling air flow in the storage device 20 more even.

In the prior art, the air return port 22 of the device is usually set on the rear side of the storage device 20, so that even if a damper is set at the air return port 22 of the device, it will not be exposed to the front side of the storage device 20, and will not affect the appearance. However, since the device air supply port 21 is also located at the rear side of the storage device 20 and is relatively close to the device air return port 22, the cooling air flowing in through the device air supply port 21 may only flow through the rear area of the storage device 20. That is, the air flows out from the air return port 22 of the device, causing the humidity in the front area of the storage device 20 to be unregulated.

For this reason, the device air return port 22 of the embodiment of the present invention is formed on the front side of the storage device 20, that is to say, the device air return port 22 and the device air supply port 21 are respectively arranged on two opposite sides of the storage device 20, In order to make the cooling air flowing in through the device air supply port 21 flow through most of the areas in the storage device 20 from back to front and then flow out from the device return air port 22, it is ensured that each area in the storage device 20 has a relatively balanced airflow. humidity. And, because the present invention prevents the air in the storage compartment 11 from entering the storage device 20 by forming an air curtain outside the air return port 22 of the device, there is no need to set dampers and other structures at the air return port 22 of the device, which will not affect The appearance of the refrigerating and freezing device 1 .

In some embodiments, the circulating air path 40 surrounds the storage device 20 along the front-rear direction and the vertical direction, and includes a first air path section 41 located above the storage device 20 and a second air path section 42 located in front of the storage device 20 , the third wind path section 43 below the storage device 20 and the fourth wind path section 44 behind the storage device 20, the first wind path section 41, the second wind path section 42, the third wind path section 43 and the fourth wind path section 44 Connected in sequence to form a closed-loop air path structure. Wherein, the second air passage section 42 is located in front of the air return port 22 of the device. When the circulating fan 60 is running, an air curtain is formed in the second air passage section 42 to isolate the air return port 22 of the device from the storage compartment 11 . When the circulating fan 60 stops running, no air curtain will be formed in the second air path section 42 , and the air return port 22 of the device communicates with the storage compartment 11 through the second air path section 42 .

Further, the storage compartment 11 has a compartment air supply port 111 and a compartment air return port 112 , and the compartment return air port 112 is adjacent to the bottom of the storage compartment 11 . The air flow direction of the storage compartment 11 in the area in front of the second air passage section 42 is vertically downward, and the circulation fan 60 is configured to force the airflow to flow through the second air passage section 42 in a vertically downward direction.

In some embodiments, the circulating air path 40 is defined by an inner shroud 45 and an outer shroud 46 arranged inside and outside. Both the inner wall 45 and the front of the outer wall 46 are provided with gaps, so that the return air outlet 22 of the device communicates with the storage compartment 11 through the gaps in the inner wall 45 and the outer wall 46 . It can be understood that, the above-mentioned second air passage section 42 is defined between the gap of the inner layer shroud 45 and the gap of the outer layer shroud 46 . When the circulating fan 60 is in a stopped state, the airflow flowing out from the air return port 22 of the device can flow to the storage compartment 11 through the above-mentioned gap, and then return to the evaporator 40 through the storage compartment 11 . When the circulating fan 60 is in the running state, an air curtain is formed between the gaps of the inner layer shroud 45 and the outer layer shroud 46 .

Further, the air return port 22 of the device extends vertically as a whole. The position and the length in the vertical direction of the breaches of the inner layer coaming plate 45 and the outer layer coaming plate 46 are matched with the position and the length in the vertical direction of the air return port 22 of the device respectively. Thus, any area of the air return port 22 of the device can be exposed to the storage compartment 11 , and when the circulating fan 60 is running, an air curtain can be formed outside any position of the air return port 22 of the device.

Specifically, the return air outlet 22 of the device may be a strip-shaped air outlet extending in the vertical direction, or may include a plurality of small through holes arranged in the vertical direction.

In some embodiments, the top of the storage device 20 is provided with a moisture-permeable membrane 23 that allows moisture inside to leak out. When the storage device 20 is in the moisturizing mode, and the humidity in the storage device 20 exceeds the maximum humidity threshold corresponding to the moisturizing mode, the moisture in the storage device 20 will leak out through the moisture-permeable membrane 23 to ensure that the storage device 20 The humidity inside is suitable. Further, the humidity inside the storage device 20 can be obtained through a humidity sensor disposed inside it.

In order to ensure that the moisture leaking out can be effectively dissipated, a certain space needs to be left above the moisture-permeable membrane 23 , for this reason, in some embodiments, an interval is provided between the inner wall 45 and the top of the storage device 20 , to form a moisture-permeable space above the moisture-permeable membrane 23 .

However, even if the moisture-permeable film 23 is provided, the humidity in the storage device 20 will still be high and may even cause condensation. Before this application, those skilled in the art generally believed that the moisture permeable membrane 23 was replaced because the moisture permeability of the moisture permeable membrane 23 did not meet the requirements, but the condensation problem was still not effectively solved. The applicant realizes that, in order to keep a large enough effective storage space in the storage compartment 11 as much as possible, the size or height of the above-mentioned moisture-permeable space has a certain limit, resulting in a relatively slow airflow velocity in the moisture-permeable space . When the internal humidity of the storage device 20 is relatively high, the outside of the moisture-permeable membrane 23 will also have relatively high humidity due to the slow flow rate of the airflow, causing the humidity inside and outside the moisture-permeable membrane 23 to reach a balance, so that the moisture-permeable membrane 23 will lose its permeability. wet capacity.

For this reason, the present invention also provides a more preferred embodiment. Fig. 5 is a partial structural schematic diagram of a refrigerating and freezing device according to another embodiment of the present invention. In a preferred embodiment, the upper section of the inner wall 45 is adjacent to or close to the top of the storage device 20, and the upper section of the inner wall 45 is provided with a see-through window 451 above the moisture-permeable membrane 23. , so as to allow the moisture-permeable membrane 23 to be exposed to the circulation air path 40 . Thus, when the storage device 20 is in the moisturizing mode, the air supply damper 30 is closed, the circulation fan 60 starts to run, and a continuous flow of air flow is formed in the circulation air path 40, which can dissipate the moisture permeated by the moisture-permeable membrane 23 to the In other areas, prevent moisture from accumulating in the space above the moisture-permeable membrane 23, and prevent the air humidity outside the moisture-permeable membrane 23 from being too high to affect the moisture-permeable effect of the moisture-permeable membrane 23.

In some embodiments, the evaporator 50 is disposed within the evaporator compartment 12 behind the storage compartment 11 . The evaporator chamber 12 communicates with the storage compartment 11 through the air supply duct 13 of the compartment, and communicates with the storage device 20 through the air supply duct 14 of the device, and the air supply duct 13 of the compartment communicates with the air supply duct 14 of the device. Independently provided, the air supply air door 30 is provided at the end of the air supply duct 14 of the device adjacent to the evaporator chamber 12 . On the one hand, the air supply of the storage device 20 and the storage compartment 11 does not affect each other. When the storage device 20 needs to supply air, it is not necessary to consider whether the storage compartment 11 is in a cooling state, whether cooling is required, and the amount of cooling capacity, etc. , that is, the air supply from the storage device 20 will not affect the temperature of the storage compartment 11; All the airflow sent by the room air supply duct 13 can flow to the storage compartment 11, which increases the air supply volume when the storage device 20 needs air supply and the air supply volume when the storage compartment 11 needs cooling, thereby improving The humidity adjustment efficiency of the storage device 20 in the drying mode and the cooling efficiency of the storage compartment 11 are determined.

In some embodiments, the number of storage devices 20 can be one, two or more than two, and when the number of storage devices 20 is two, the two storage devices 20 can be arranged side by side in the storage room along the horizontal direction. bottom of chamber 11.

Those skilled in the art should understand that the refrigerating and freezing device 1 of the present invention includes not only a refrigerator, but also storage devices with refrigerating, freezing or other storage functions, such as refrigerators, freezers and the like.

Those skilled in the art should also understand that terms such as "up", "down", "front", "rear", "top", and "bottom" in the embodiments of the present invention are used to indicate orientation or positional relationship. Based on the actual use state of the refrigerating and freezing device 1, these terms are only for the convenience of describing and understanding the technical solution of the present invention, rather than indicating or implying that the referred device or component must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention.

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

A refrigerating and freezing device, comprising a storage compartment for storing items and an evaporator for providing cooling airflow, wherein the refrigerating and freezing device further includes:

The storage device is arranged in the storage compartment, and has a device air supply port for air flow into it and a device air return port for the air flow in it to flow out, and the device air return port is exposed to the storage in the room

an air supply damper disposed at the device air supply port or on the air flow path between the evaporator and the device air supply port and configured to be controlled to open to allow cooling airflow into the storage device internal or controlled closure to prevent cooling air flow from entering said storage device;

A circulating air path is arranged outside the storage device, and a part of the circulating air path is outside the air return port of the device; and

A circulating fan is arranged in the circulating air path and is configured to be activated in a controlled manner when the air supply door is closed, so as to promote the circulation of the airflow along the circulating air path, thereby forming a wind curtain.
The refrigerator-freezer according to claim 1, wherein,

The circulating fan is arranged so that the air flow direction of the formed air curtain is the same as the air flow direction in the storage compartment outside the air curtain.
The refrigerator-freezer according to claim 2, wherein,

The device air supply port is formed on the rear side of the storage device, and the device air return port is formed on the front side of the storage device.
The refrigerator-freezer according to claim 3, wherein,

The circulating air path surrounds the storage device along the front-rear direction and the vertical direction, and includes a first air path section above the storage device, a second air path section in front of the storage device, and a The third wind path section below the storage device and the fourth wind path section behind the storage device, the first wind path section, the second wind path section, the third wind path section and the fourth wind path section sequentially connected;

The second air path section is located in front of the return air outlet of the device.
The refrigerator-freezer according to claim 4, wherein,

The storage compartment has a compartment air supply port and a compartment air return port, the compartment return air port is adjacent to the bottom of the storage compartment; and

The airflow direction of the storage compartment in the area in front of the second air path section is vertically downward, and the circulation fan is configured to encourage the airflow to flow through the second airflow in a vertically downward direction. road section.
The refrigerator-freezer according to claim 3, wherein,

The circulating air is defined by inner and outer coamings arranged inside and outside; and

Both the inner wall and the front of the outer wall are provided with gaps, so that the air return port of the device passes through the gap between the inner wall and the outer wall and the storage space. room connected.
The refrigerator-freezer according to claim 6, wherein,

The air return port of the device extends vertically as a whole; and

The positions and lengths of the gaps in the vertical direction of the inner wall and the outer wall are respectively matched with the vertical position and length of the air return port of the device .
The refrigerator-freezer according to claim 6, wherein,

The top of the storage device is provided with a moisture-permeable membrane that allows the moisture inside to leak out; and

The inner wall is spaced apart from the top of the storage device to form a moisture-permeable space above the moisture-permeable membrane; or, the upper section of the inner wall and the storage device The top of the device is adjacent to or close to, and the upper section of the inner wall is provided with a see-through window above the moisture-permeable membrane to allow the moisture-permeable membrane to be exposed to the circulating air path.
The refrigerating and freezing device according to claim 1, wherein the storage device has a drying mode and a moisturizing mode with different preset humidity ranges; and

The supply damper is configured to controllably open or close when the storage unit is in a dry mode to selectively allow cooling airflow generated by the evaporator to flow into the storage unit, within the storage unit Controlled closure to prevent the cooling air flow from flowing into the storage device when in the moisturizing mode.
The refrigerator-freezer according to claim 1, wherein,

the evaporator is disposed in an evaporator chamber located behind the storage compartment; and

The evaporator chamber communicates with the storage compartment through the air supply duct of the compartment, and communicates with the storage device through the air supply duct of the device, and the air supply duct of the compartment communicates with the device for air supply. The air ducts are independent of each other, and the air supply door is arranged at the end of the air supply air duct of the device adjacent to the evaporator chamber.