Air return assembly for refrigerator and refrigerator

Abstract

The utility model relates to the technical field of refrigerators, and discloses an air return assembly for a refrigerator. The air return assembly for the refrigerator comprises an air return cover plate suitable for dividing the internal space of the refrigerator into an evaporator cavity and a storage cavity and provided with a main air return opening communicating with the evaporator cavity and the storage cavity; the heat preservation plate is suitable for being arranged between the evaporator and the air return cover plate; the main air return duct is arranged between the main air return port and the evaporator; the auxiliary air return duct is arranged on the side, facing the air return cover plate, of the heat preservation plate and / or the air return cover plate and communicated with the main air return duct and the evaporator cavity and the storage cavity so that airflow in the storage cavity can flow into the evaporator cavity from the auxiliary air return duct. The auxiliary air return duct communicated with the main air return duct is arranged, and the auxiliary air return duct is communicated with the evaporator cavity and the storage cavity, so that when the main air return port is blocked, airflow in the storage cavity can flow into the evaporator cavity through the auxiliary air return duct for refrigeration, and the anti-blocking effect of the air return port of the refrigerator is improved. The utility model further discloses the refrigerator.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and in particular to a return air assembly for a refrigerator and a refrigerator. Background Art

[0002] At present, when users use horizontal air-cooled freezers, they usually put a lot of bagged food, especially plastic bag packaging items, in the internal space. The items are easily in contact with the return air vents, causing blockage of the return air vents. After the return air vents are blocked, normal air circulation cannot be formed in the freezer, affecting the refrigeration temperature. At the same time, the blockage of the return air vents will cause negative pressure in the air duct, and humid air will enter the air duct through other gaps instead of passing through the evaporator, causing ice to form in the fan assembly and forming fan ice blockage.

[0003] The related technology sets a cover plate protruding from the return air port on the side of the return air port away from the evaporator cavity, so that the airflow flows into the evaporator cavity through the gap between the cover plate and the return air port. The cover plate can prevent foreign matter from entering the evaporator cavity and avoid clogging the return air port and the evaporator cavity.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The related technology prevents objects from coming into contact with the return air outlet and causing blockage by setting a cover at the return air outlet. However, in actual applications, when objects accumulate in the internal space on the side of the cover, they will still come into contact with the gap between the cover and the return air outlet, causing the return air outlet to be blocked.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiments provide a return air assembly for a refrigerator and the refrigerator, so as to improve the anti-blocking effect of the return air outlet of the refrigerator.

[0009] According to a first aspect of an embodiment of the utility model, a return air assembly for a refrigerator is provided, comprising: a return air cover, suitable for dividing the internal space of the refrigerator into an evaporator chamber and a storage chamber, and provided with a main return air port connecting the evaporator chamber and the storage chamber; a thermal insulation plate, suitable for being arranged between the evaporator and the return air cover; a main return air duct, arranged between the main return air port and the evaporator; an auxiliary return air duct, arranged on the side of the thermal insulation plate facing the return air cover and / or the return air cover, communicating with the main return air duct, connecting the evaporator chamber and the storage chamber, so that the airflow of the storage chamber can flow from the auxiliary return air duct into the evaporator chamber.

[0010] Optionally, when the auxiliary return air duct is arranged on the side of the insulation plate facing the return air cover, the auxiliary return air duct includes a first groove duct, which is formed by at least partially recessing the surface of the insulation plate on the side facing the return air cover; the return air cover is correspondingly provided with an auxiliary return air port, which is connected to the first groove duct, so that the airflow of the storage cavity flows into the first groove duct through the auxiliary return air port.

[0011] Optionally, the return air cover includes a top plate and a side plate, the side plate is connected to one end of the top plate and extends downward; the insulation plate includes a top wall and a side wall, the side wall is connected to one end of the top wall and extends downward; the top plate and the top wall are arranged correspondingly, and the side plate and the side wall are arranged correspondingly; the first groove air duct includes a first top air duct, which is arranged on the top wall of the insulation plate; the auxiliary return air port includes a first auxiliary return air port, which is arranged on the top plate of the return air cover and is correspondingly connected to the first top air duct; and / or, the first groove air duct includes a first side wall air duct, which is arranged on the side wall of the insulation plate; the auxiliary return air port includes a second auxiliary return air port, which is arranged on the side plate of the return air cover and is correspondingly connected to the first side wall air duct.

[0012] Optionally, in the case where the top plate of the return air cover is provided with a first auxiliary return air outlet, multiple first auxiliary return air outlets extend along the first direction and are arranged on the top plate at intervals along the second direction, and the return air cover also includes: a first cover plate, which is covered on the first auxiliary return air outlet, connected to the top plate, and protrudes from the first auxiliary return air outlet in a direction away from the evaporator cavity, and there is a first gap between the side of the first cover plate and the first auxiliary return air outlet, so that the airflow of the storage cavity flows into the evaporator cavity through the first gap; wherein the first direction is the length or width direction of the return air cover, and the second direction is a direction perpendicular to the first direction.

[0013] Optionally, when the top plate of the return air cover is provided with a first auxiliary return air outlet, the return air cover also includes: a waterproof platform, which is provided on the top plate, located on two opposite sides of the first auxiliary return air outlet, extending in the same direction as the first auxiliary return air outlet and protruding upward; when the return air cover includes the first cover, the waterproof platform protrudes upward to cover the lower edge of the first gap.

[0014] Optionally, when the side panel of the return air cover is provided with a second auxiliary return air outlet, the return air cover also includes: a grille structure, provided at the second auxiliary return air outlet and connected to the side panel, the grille structure including a plurality of first bars, the plurality of first bars being arranged in sequence at the second auxiliary return air outlet and protruding toward the storage cavity, and the protruding lengths of every two adjacent first bars are different.

[0015] Optionally, when the auxiliary return air duct is provided on the return air cover, the auxiliary return air duct includes: a second groove duct, the outer surface of the return air cover is provided with a plurality of rib structures arranged at intervals, a second groove duct is formed between adjacent rib structures, and the second groove duct is connected to the main return air outlet, so that the airflow in the storage cavity flows into the main return air outlet through the second groove duct.

[0016] Optionally, the main return air outlet extends along the first direction, and a second cover plate is provided on the outer side of the main return air outlet. The second cover plate is arranged to protrude from the main return air outlet in a direction away from the evaporator cavity, and a second gap is present between the side surface of the second cover plate and the main return air outlet, so that the airflow of the storage cavity can flow into the evaporator cavity through the second gap; multiple rib structures extend along the second direction toward the main return air outlet, and a second groove air duct is arranged corresponding to the second gap, so that the airflow of the storage cavity can flow into the second gap through the second groove air duct.

[0017] Optionally, there are multiple main return air outlets, which extend along the second direction and are spaced apart along the first direction; a third cover plate is provided on the outer side of each main return air outlet, which protrudes from the main return air outlet in a direction away from the evaporator chamber, and a third gap is provided between the side of the third cover plate and the main return air outlet, so that the airflow from the storage chamber flows into the evaporator chamber through the third gap, and an airflow channel is formed between adjacent third cover plates; each rib structure extends along the second direction toward the third cover plate, so that at least a portion of each second ventilation groove is communicated with the airflow channel.

[0018] According to a second aspect of an embodiment of the utility model, a refrigerator is provided, comprising: a return air assembly for a refrigerator as described in any one of the above items.

[0019] The return air assembly for a refrigerator and the refrigerator provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] By cooperating with the main return air port and the main return air duct, the normal return air of the refrigerator can be achieved. On the basis that the refrigerator is provided with a main return air duct, an auxiliary return air duct connected to the main return air duct is further provided, and the auxiliary return air duct connects the evaporator cavity and the storage cavity. In this way, when blockage occurs at the main return air port, the airflow of the storage cavity can also flow into the evaporator cavity through the auxiliary return air duct for refrigeration, thereby improving the anti-blocking effect of the return air port of the refrigerator. The insulation board is usually arranged with the evaporator on one side and the return air cover on the other side. In the embodiment of the present disclosure, an auxiliary return air duct is arranged on the side of the insulation board facing the return air cover, or an auxiliary return air duct is arranged on the return air cover, both of which can achieve communication with the storage cavity and the evaporator cavity. At the same time, the provision of the auxiliary return air duct can also increase the flow velocity of the airflow in the storage cavity and improve the refrigeration efficiency.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a schematic structural diagram of a return air assembly for a refrigerator provided by an embodiment of the present disclosure;

[0024] Figure 2 yes Figure 1 The cross-sectional schematic diagram along the AA direction is shown;

[0025] Figure 3 yes Figure 1 A schematic cross-sectional view along the BB direction is shown;

[0026] Figure 4 yes Figure 3 An enlarged schematic diagram of section A is shown;

[0027] Figure 5 is a schematic structural diagram of a heat preservation board provided by an embodiment of the present disclosure;

[0028] Figure 6 is a schematic structural diagram of another return air assembly for a refrigerator provided by an embodiment of the present disclosure, wherein the direction indicated by the arrow is a first direction;

[0029] Figure 7 is a structural schematic diagram of another return air assembly for a refrigerator provided by an embodiment of the present disclosure, wherein the direction indicated by the arrow is a first direction;

[0030] Figure 8is a structural schematic diagram of another return air assembly for a refrigerator provided by an embodiment of the present disclosure, wherein the direction indicated by the arrow is the second direction;

[0031] Fig. 9 is a structural schematic diagram of a refrigerator provided by an embodiment of the present disclosure;

[0032] Fig.10 yes Fig. 9 A schematic cross-sectional view along the CC direction is shown.

[0033] Reference numerals:

[0034] 10: return air cover; 101: top plate; 102: side plate; 11: main return air outlet; 12: auxiliary return air outlet; 121: first auxiliary return air outlet; 122: second auxiliary return air outlet; 13: first cover plate; 131: first gap; 14: grille structure; 141: first grille bar; 142: second grille bar; 15: waterproof platform; 16: convex rib structure; 17: second cover plate; 171: second gap; 18: third cover plate; 181: air flow channel; 182: third gap;

[0035] 20: insulation board; 21: top wall; 22: side wall; 23: third groove air duct;

[0036] 30: Main return air duct;

[0037] 40: auxiliary return air duct; 41: first groove air duct; 411: first end; 412: second end; 413: first top air duct; 414: first side wall air duct; 42: second groove air duct;

[0038] 50: Refrigerator; 51: Evaporator cavity; 52: Storage cavity; 53: Evaporator. DETAILED DESCRIPTION

[0039] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0040] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate for the disclosed embodiments described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0042] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0043] Unless otherwise stated, the term "plurality" means two or more.

[0044] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0045] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0046] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0047] Combination Figure 1-10 As shown, the embodiment of the present disclosure provides a return air assembly for a refrigerator 50. The return air assembly includes a return air cover plate 10, a heat preservation plate 20, a main return air duct 30 and an auxiliary return air duct 40.

[0048] The return air cover 10 is suitable for dividing the internal space of the refrigerator 50 into an evaporator cavity 51 and a storage cavity 52, and is provided with a main return air port 11 connecting the evaporator cavity 51 and the storage cavity 52; the insulation board 20 is suitable for being arranged between the evaporator 53 and the return air cover 10; the main return air duct 30 is arranged between the main return air port 11 and the evaporator cavity 51; the auxiliary return air duct 40 is arranged on the side of the insulation board 20 facing the return air cover 10 and / or the return air cover 10, the auxiliary return air duct 40 is communicated with the main return air duct 30, connecting the evaporator cavity 51 and the storage cavity 52, so that the airflow of the storage cavity 52 can flow from the auxiliary return air duct 40 into the evaporator cavity 51.

[0049] By adopting the return air assembly for the refrigerator 50 provided in the embodiment of the present disclosure, the conventional return air of the refrigerator 50 can be realized by cooperating with the main return air port 11 and the main return air duct 30. On the basis that the refrigerator 50 is provided with the main return air duct 30, an auxiliary return air duct 40 communicating with the main return air duct 30 is further provided, and the auxiliary return air duct 40 connects the evaporator cavity 51 and the storage cavity 52, so that when the main return air port 11 is blocked, the airflow of the storage cavity 52 can also flow into the evaporator cavity 51 through the auxiliary return air duct 40 for refrigeration, thereby improving the anti-blocking effect of the return air port of the refrigerator 50. The insulation board 20 is usually arranged with the evaporator 53 on one side and the return air cover 10 on the other side. In the embodiment of the present disclosure, the auxiliary return air duct 40 is arranged on the side of the insulation board 20 facing the return air cover 10, or the auxiliary return air duct 40 is arranged on the return air cover 10, both of which can achieve communication with the storage cavity 52 and the evaporator cavity 51. At the same time, the provision of the auxiliary return air duct 40 can also increase the flow speed of the airflow in the storage cavity 52 and improve the refrigeration efficiency.

[0050] At present, the main return air inlet 11 of the refrigerator is usually arranged at the position of the return air cover plate 10. Figure 6 As shown at B and C in FIG.

[0051] Combination Figure 9-10 As shown, an evaporator cavity 51 is enclosed between the inner tank of the refrigerator 50 and the return air cover 10, and the evaporator 53 is arranged in the evaporator cavity 51. The evaporator 53 is located on one side of the evaporator cavity 51, and on the other side of the evaporator cavity 51, there is a return air gap for air flow between the evaporator 53 and the inner tank side wall 22. The return air gap can serve as the main return air duct 30 in the embodiment of the present disclosure, and the main return air port 11 is arranged at the return air cover 10 corresponding to the return air gap. It can be understood that the main return air duct 30 can also be other forms of ducts, which can connect the main return air port 11 and the evaporator cavity 51 to achieve conventional return air.

[0052] Optionally, combined Figure 2 and Figure 5As shown, when the auxiliary return air duct 40 is arranged on the side of the insulation board 20 facing the return air cover 10, the auxiliary return air duct 40 includes a first groove duct 41, which is formed by at least a partial depression of the surface of the insulation board 20 on the side facing the return air cover 10; the return air cover 10 is correspondingly provided with an auxiliary return air port 12, and the auxiliary return air port 12 is connected to the first groove duct 41, so that the airflow of the storage cavity 52 flows into the first groove duct 41 through the auxiliary return air port 12.

[0053] An auxiliary return air duct 40 is added to the insulation board 20 and communicated with the evaporator chamber 51 . Together with the additional auxiliary return air port 12 , the return air area can be effectively increased to prevent problems such as fan ice blockage caused by blockage of the main return air port 11 .

[0054] The evaporator 53 of the refrigerator 50 is usually provided with an insulation board 20 for sealing and heat preservation. In the embodiment of the present disclosure, a first groove air duct 41 is provided on the existing insulation board 20 structure, which is formed by at least a partial depression of the surface of the insulation board 20 facing the return air cover 10. The structure of the first groove air duct 41 is simple and easy to produce. The insulation board 20 is made of foam material.

[0055] The surface of the insulation board 20 facing the return air cover 10 is at least partially recessed to form a first groove air duct 41. The degree of recess of the first groove air duct 41 can be determined according to actual conditions such as the support strength of the insulation board 20 and the return air volume requirement, including the recessed area, recessed depth, etc. The present application does not limit the degree of recess of the first groove air duct 41, as long as the storage cavity 52 and the evaporator cavity 51 can be connected through the auxiliary return air port 12.

[0056] Optionally, combined Figure 3 and Figure 5 As shown, the surface of the insulation board 20 facing the return air cover plate 10 is in contact with the return air cover plate 10 except for the first groove air duct 41. The first groove air duct 41 includes a first end 411 and a second end 412. The first end 411 is open and connected to the main return air duct 30, and the second end 412 is closed.

[0057] The first end 411 of the first groove air duct 41 is open, and the second end 412 is closed, so that the airflow entering the first groove air duct 41 can only flow out from the first end 411 to the evaporator chamber 51. The first end 411 of the first groove air duct 41 is connected with the main return air duct 30, so that the airflow flowing into the first groove air duct 41 can pass through the evaporator 53 for cooling after flowing into the main return air duct 30 through the first end 411 or directly into the evaporator 53 compartment, and will not flow directly from the second end 412 of the first groove air duct 41.

[0058] Optionally, combined Figure 5As shown, the side of the insulation board 20 facing the evaporator 53 is at least partially recessed to form a third groove duct 23, and the third groove duct 23 is suitable for connecting the main return air port 11 and the evaporator 53, so that the airflow flowing into the main return air port 11 can flow from the third groove duct 23 into the evaporator 53. The third groove duct 23 is also connected to the main return air duct 30.

[0059] When the return air surface of the evaporator 53 is frosted, the air volume flowing into the evaporator 53 will decrease, the wind resistance will increase, and the refrigeration effect of the freezer 50 will be affected. The insulation board 20 is recessed on one side facing the evaporator 53 to form a third groove air duct 23, so that even if the return air surface of the evaporator 53 is frosted, the airflow flowing into the storage cavity 52 through the main return air port 11 can still flow into the evaporator 53 from the third groove air duct 23, thereby ensuring the airflow of the evaporator 53.

[0060] Optionally, combined Figure 2 and Figure 5-6 As shown, the return air cover plate 10 includes a top plate 101 and a side plate 102, the side plate 102 is connected to one end of the top plate 101 and extends downward; the insulation board 20 includes a top wall 21 and a side wall 22, the side wall 22 is connected to one end of the top wall 21 and extends downward; the top plate 101 is arranged correspondingly to the top wall 21, and the side plate 102 is arranged correspondingly to the side wall 22; the first groove air duct 41 includes a first top air duct 413, and the first top air duct 413 is arranged on the top wall 21 of the insulation board 20; the auxiliary return air port 1 2 includes a first auxiliary return air port 121, which is provided on the top plate 101 of the return air cover plate 10 and is correspondingly communicated with the first top air duct 413; and / or, the first groove air duct 41 includes a first side wall air duct 414, which is provided on the side wall 22 of the insulation board 20; the auxiliary return air port 12 includes a second auxiliary return air port 122, which is provided on the side plate 102 of the return air cover plate 10 and is correspondingly communicated with the first side wall air duct 414.

[0061] The first groove air duct 41 includes a first top air duct 413 provided on the top wall 21 of the insulation board 20, and the auxiliary return air port 12 includes a first auxiliary return air port 121 provided on the top plate 101 of the return air cover plate 10, which can effectively utilize the space above the evaporator 53. The first auxiliary return air port 121 is correspondingly connected with the first top air duct 413, which can ensure an effective return air area, and assist in guiding the airflow on the upper side of the top plate 101 of the return air cover plate 10 in the internal space of the refrigerator 50 to flow into the evaporator 53 compartment.

[0062] The first groove air duct 41 includes a first side wall air duct 414 provided on the side wall 22 of the insulation board 20, and the auxiliary return air port 12 includes a second auxiliary return air port 122 provided on the side plate 102 of the return air cover plate 10, which can effectively utilize the space on the side of the evaporator 53. The second auxiliary return air port 122 is correspondingly connected with the first side wall air duct 414, so that an effective return air area can be ensured, and the airflow outside the side plate 102 of the return air cover plate 10 in the internal space of the refrigerator 50 is assisted in guiding to flow into the evaporator 53 compartment.

[0063] Combination Figure 5-6 As shown, the present application takes the first groove air duct 41 including the first top air duct 413 and the first side wall air duct 414, and the auxiliary return air outlet 12 including the first auxiliary return air outlet 121 and the second auxiliary return air outlet 122 as an example. The first top wall 21 air duct and the first side wall air duct 414 are respectively arranged on the top wall 21 and the side wall 22 of the insulation board 20, and the first auxiliary return air outlet 121 and the second auxiliary return air outlet 122 are respectively arranged on the top plate 101 and the side plate 102 of the return air cover plate 10. By cooperating with the auxiliary return air channel and the auxiliary return air outlet 12, the return air area can be effectively increased and the refrigeration effect can be improved. In this way, even if the main return air outlet 11 conventionally arranged in the refrigerator 50 is partially or completely blocked, the normal circulation of the air in the internal space of the refrigerator 50 can still be ensured, and the wind circulation in the internal space of the refrigerator 50 is realized through the evaporator 53 and the evaporating fan, so as to effectively cool the refrigerator.

[0064] Optionally, combined Figure 6 As shown, in the case where the top plate 101 of the return air cover 10 is provided with a first auxiliary return air port 121, a plurality of first auxiliary return air ports 121 extend along the first direction and are arranged at intervals on the top plate 101 along the second direction, and the return air cover 10 also includes a first cover 13, the first cover 13 is covered on the first auxiliary return air port 121, is connected to the top plate 101, and is protruded from the first auxiliary return air port 121 in a direction away from the evaporator chamber 51, and a first gap 131 is present between the side surface of the first cover 13 and the first auxiliary return air port 121, so that the airflow of the storage chamber 52 flows into the evaporator chamber 51 through the first gap 131; wherein the first direction is the length or width direction of the return air cover 10, and the second direction is a direction perpendicular to the first direction.

[0065] In the case where the top plate 101 of the return air cover plate 10 is provided with the first auxiliary return air outlet 121, a plurality of first auxiliary return air outlets 121 may extend along the length direction of the return air cover plate 10 and be arranged at intervals on the top plate 101 along the width direction of the return air cover plate 10, or a plurality of first auxiliary return air outlets 121 may extend along the width direction of the return air cover plate 10 and be arranged at intervals on the top plate 101 along the length direction of the return air cover plate 10. The present application takes the case where a plurality of first auxiliary return air outlets 121 extend along the width direction of the return air cover plate 10 and are arranged at intervals on the top plate 101 along the length direction of the return air cover plate 10 as an example.

[0066] By covering the first auxiliary return air outlet 121 of the top plate 101 with the first cover plate 13 protruding in the direction away from the evaporator chamber 51, the upper side of the first auxiliary return air outlet 121 can be protected to prevent foreign objects from falling in and causing blockage, thereby avoiding affecting the return air effect. At the same time, the first cover plate 13 is set in a covering manner to form a bearing surface and play a load-bearing role. The first gap 131 is set on the side of the first cover plate 13, so that the first auxiliary return air outlet 121 located on the top plate 101 of the return air cover plate 10 returns air through the side, which can fully utilize the upper space of the return air cover plate 10 for load bearing while effectively returning air.

[0067] The plurality of first auxiliary return air vents 121 extend along the first direction, and the first cover plates 13 of the plurality of first auxiliary return air vents 121 also extend along the first direction, and can support the weight of articles while shielding the first auxiliary return air vents 121. The plurality of first auxiliary return air vents 121 are arranged on the top plate 101 at intervals along the second direction, and can make full use of the space of the top plate 101, effectively increase the return air area, and also increase the load-bearing area.

[0068] Combination Figure 6 As shown, in the disclosed embodiment, the main return air vent 11 and the first auxiliary return air vent 121 adopt the same extension arrangement direction and cover plate structure. The main return air vent 11 cooperates with the first auxiliary return air vent 121 to cover the top plate 101 with return air vents. With more return air vents, the return air area is increased, and the space above the evaporator 53 can be effectively utilized. Even if some return air vents are blocked, the effective return air area can still be ensured.

[0069] Optionally, the first cover plate 13 includes a cover plate body and a plurality of support ribs, the plurality of support ribs are supported between the cover plate body and the top plate 101, the plurality of support ribs are arranged at intervals, and a first gap 131 is formed between adjacent support ribs. The plurality of support ribs can enhance the strength of the first cover plate 13, and the first gap 131 can be formed between adjacent support ribs to ensure a larger return air area.

[0070] Optionally, in the case where the top plate 101 of the return air cover plate 10 is provided with a first auxiliary return air port 121, Figure 3-4 As shown, the return air cover 10 also includes a waterproof platform 15, which is arranged on the top plate 101, located on the opposite sides of the first auxiliary return air outlet 121, extending in the same direction as the first auxiliary return air outlet 121 and protruding upward; when the return air cover 10 includes the first cover plate 13, the waterproof platform 15 protrudes upward to cover the lower edge of the first gap 131.

[0071] The first auxiliary air return port 121 located at the top plate 101 may be frozen or defrosted. The waterproof platform 15 is provided at two opposite sides of the first auxiliary air return port 121, extending in the same direction as the first auxiliary air return port 121 and protruding upward, and can form protection at the opposite sides of the first auxiliary air return port 121 to prevent water in the storage cavity 52 from flowing into the evaporator cavity 51 from the first auxiliary air return port 121, thereby affecting the normal operation of the evaporator 53.

[0072] Optionally, combined Figure 1 and Figure 6 As shown, when the side plate 102 of the return air cover plate 10 is provided with a second auxiliary return air port 122, the return air cover plate 10 further includes a grille structure 14, which is provided at the second auxiliary return air port 122 and connected to the side plate 102. The grille structure 14 includes a plurality of first grille bars 141, which are sequentially arranged at the second auxiliary return air port 122 and protrude toward the storage cavity 52, as shown in FIG. Figure 1 As shown, the protruding lengths of every two adjacent first grid bars 141 are different.

[0073] The plurality of first bars 141 protrude toward the storage cavity 52 to prevent the items in the storage cavity 52 from directly contacting the second auxiliary air return port 122. The protruding lengths of every two adjacent first bars 141 are different, so that the plurality of first bars 141 can block the items at different distances, thereby more effectively preventing the second auxiliary air return port 122 from being blocked.

[0074] Since the second auxiliary return air vent 122 is located at the side plate 102 of the return air cover plate 10, and the side plate 102 does not need to bear weight, the second auxiliary return air vent 122 is provided with a grille structure 14, which has a simple process and saves materials. At the same time, the grille structure 14 ensures a larger return air area for the second auxiliary return air vent 122. It is understandable that a cover plate structure similar to the first cover plate 13 can also be provided at the second auxiliary return air vent 122.

[0075] Optionally, combined Figure 1 As shown, a plurality of first grille bars 141 are sequentially arranged at the second auxiliary air return port 122 and protrude in a wave-like manner toward the storage cavity 52 .

[0076] Both ends of the first cover plate 13 and both ends of the first grid bar 141 can be arranged to be inclined toward the return air cover plate 10. The inclined transition setting can facilitate the placement of items, prevent scratching hands when taking items, and is visually concise, thereby improving user experience.

[0077] Optionally, combined Figure 6As shown, the grille structure 14 also includes a plurality of second bars 142, a plurality of first bars 141 extending along the third direction and arranged in sequence at the second auxiliary return air outlet 122 along the fourth direction, a plurality of second bars 142 extending along the fourth direction and arranged in sequence at the second auxiliary return air outlet 122 along the third direction, and a plurality of first bars 141 and a plurality of second bars 142 are staggered; wherein the third direction is the length or width direction of the side panel 102, and the fourth direction is a direction perpendicular to the third direction.

[0078] A plurality of first bars 141 extend along the length direction of the side plate 102, and are sequentially arranged at the second auxiliary return air outlet 122 along the width direction of the side plate 102; a plurality of second bars 142 extend along the width direction of the side plate 102, and are sequentially arranged at the second auxiliary return air outlet 122 along the length direction of the side plate 102. Alternatively, a plurality of first bars 141 extend along the width direction of the side plate 102, and are sequentially arranged at the second auxiliary return air outlet 122 along the length direction of the side plate 102; a plurality of second bars 142 extend along the length direction of the side plate 102, and are sequentially arranged at the second auxiliary return air outlet 122 along the width direction of the side plate 102. The present application takes as an example a plurality of first bars 141 extend along the width direction of the side plate 102, and are sequentially arranged at the second auxiliary return air outlet 122 along the length direction of the side plate 102; a plurality of second bars 142 extend along the length direction of the side plate 102, and are sequentially arranged at the second auxiliary return air outlet 122 along the width direction of the side plate 102. It is understandable that the first grid bars 141 and the second grid bars 142 may also be arranged alternately along other directions.

[0079] The first grid bar 141 and the second grid bar 142 are staggeredly arranged at the second auxiliary air return port 122, which can better block the items in the storage cavity 52 and prevent the second auxiliary air return port 122 from being blocked. It is understandable that the second grid bar 142 can also be arranged to protrude toward the storage cavity 52.

[0080] Optionally, combined Figure 7-8 As shown, when the auxiliary return air duct 40 is arranged on the return air cover 10, the auxiliary return air duct 40 includes a second groove duct 42, and the outer surface of the return air cover 10 is provided with a plurality of convex rib structures 16 arranged at intervals, and a second groove duct 42 is formed between adjacent convex rib structures 16, and the second groove duct 42 is connected to the main return air port 11, so that the airflow of the storage cavity 52 flows into the main return air port 11 through the second groove duct 42.

[0081] A second groove air duct 42 is formed between adjacent convex rib structures 16, and an air duct effect can be formed when the items are placed there. The airflow of the storage cavity 52 can flow into the main return air port 11 through the second groove air duct 42, and then flow into the evaporator cavity 51 from the main return air port 11 to be cooled by the evaporator 53. At the same time, the multiple convex rib structures 16 can also play a load-bearing role.

[0082] Optionally, combined Figure 7 As shown, the main return air inlet 11 extends along the first direction, and a second cover plate 17 is provided on the outer side of the main return air inlet 11. The second cover plate 17 is arranged to protrude from the main return air inlet 11 in a direction away from the evaporator chamber 51, and a second gap 171 is present between the side surface of the second cover plate 17 and the main return air inlet 11, so that the airflow of the storage chamber 52 can flow into the evaporator chamber 51 through the second gap 171; a plurality of convex rib structures 16 extend along the second direction toward the main return air inlet 11, and a second groove air duct 42 is arranged corresponding to the second gap 171, so that the airflow of the storage chamber 52 can flow into the second gap 171 through the second groove air duct 42.

[0083] The main return air port 11 extends along the first direction to form a long strip-shaped main return air port 11, which can ensure a larger return air area. A plurality of convex rib structures 16 extend along the second direction toward the main return air port 11, and are arranged vertically opposite to the main return air port 11, so that the second groove air duct 42 and the second gap 171 arranged on the side of the second cover plate 17 can be arranged opposite to each other, shortening the flow path of the airflow of the storage cavity 52 flowing into the second gap 171 through the second groove air duct 42. It can be understood that, combined with Figure 7 As shown, the number of main return air outlets 11 can be multiple, and the multiple main return air outlets 11 are arranged at intervals along the second direction. The second gaps 171 of the multiple main return air outlets 11 are connected, and the air flow can flow into the second gaps 171 of the multiple main return air outlets 11 through the second groove duct 42.

[0084] The present application takes the example that the main return air inlet 11 and the multiple convex rib structures 16 are arranged on the top plate 101. It can be understood that the main return air inlet 11 and the multiple convex rib structures 16 can also be arranged on the side plate 102. When the main return air inlet 11 and the multiple convex rib structures 16 are arranged on the side plate 102, the main return air inlet 11 extends along the width direction of the side plate 102, and the outer side of the main return air inlet 11 is covered with a second cover plate 17, and the second cover plate 17 is arranged to protrude from the main return air inlet 11 in a direction away from the evaporator chamber 51, and there is a second gap 171 between the side of the second cover plate 17 and the main return air inlet 11, so that the airflow of the storage chamber 52 flows into the evaporator chamber 51 through the second gap 171; the multiple convex rib structures 16 extend toward the main return air inlet 11 along the length direction of the side plate 102, and the second groove air duct 42 is arranged corresponding to the second gap 171, so that the airflow of the storage chamber 52 flows into the second gap 171 through the second groove air duct 42.

[0085] Optionally, combined Figure 8As shown, there are multiple main return air outlets 11, and the multiple main return air outlets 11 extend along the second direction and are arranged at intervals along the first direction; a third cover plate 18 is covered on the outer side of each main return air outlet 11, and the third cover plate 18 is arranged to protrude from the main return air outlet 11 in the direction away from the evaporator chamber 51, and a third gap 182 is present between the side of the third cover plate 18 and the main return air outlet 11, so that the airflow of the storage chamber 52 flows into the evaporator chamber 51 through the third gap 182, and an airflow channel 181 is formed between adjacent third cover plates 18; each rib structure 16 extends along the second direction toward the third cover plate 18, so that at least a portion of each second ventilation groove is communicated with the airflow channel 181.

[0086] Multiple main return air ports 11 extend along the second direction to form multiple long strip main return air ports 11, which can ensure a larger return air area. A third cover plate 18 is provided on the outside of each main return air port 11, so each third cover plate 18 also extends along the second direction, and the airflow channel 181 formed between adjacent third cover plates 18 also extends along the second direction accordingly. Each rib structure 16 extends toward the third cover plate 18 along the second direction, so that the second groove air duct 42 between adjacent rib structures 16 can extend in the same direction as the airflow channel 181. Multiple third cover plates 18 cooperate with items placed on the top plate 101 of the return air cover plate 10 to form an airflow channel 181. Multiple rib structures 16 cooperate with items placed on the top plate 101 of the return air cover plate 10 to form a second groove air duct 42. At least part of each second ventilation groove is in communication with the airflow channel 181, and the airflow flows into the airflow channel 181 through the second groove air duct 42, and then flows into the evaporator chamber 51 through the third gap 182.

[0087] Optionally, combined Figure 8 As shown, each rib structure 16 is arranged one-to-one with the third cover plate 18 along the second direction, so that each second ventilation groove is communicated with the air flow channel 181 along the second direction.

[0088] Each rib structure 16 is arranged one-to-one with the third cover plate 18 along the second direction, so that each second ventilation groove is completely corresponding to and communicates with the air flow channel 181 along the second direction, which can improve the flow effect of the airflow and enable the return air flow through the main return air port 11 to more comprehensively cover the evaporator cavity 51 and cool more effectively.

[0089] Combination Figure 9-10 As shown, an embodiment of the present disclosure provides a cold cabinet 50, comprising the return air assembly for the cold cabinet 50 described in any one of the above disclosed embodiments.

[0090] The refrigerator 50 provided in the embodiment of the present disclosure includes the return air assembly for the refrigerator 50 described in any of the above disclosed embodiments, and therefore has all the beneficial effects of the return air assembly for the refrigerator 50 described in any of the above disclosed embodiments, which will not be repeated here.

[0091] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A return air assembly for a refrigerator, characterized in that: include: The return air cover is suitable for dividing the internal space of the refrigerator into an evaporator cavity and a storage cavity, and is provided with a main return air port connecting the evaporator cavity and the storage cavity; The insulation board is suitable for being arranged between the evaporator and the return air cover plate; The main return air duct is located between the main return air outlet and the evaporator; The auxiliary return air duct is arranged on the side of the insulation board facing the return air cover and / or the return air cover, and is communicated with the main return air duct, connecting the evaporator cavity and the storage cavity, so that the airflow of the storage cavity can flow from the auxiliary return air duct into the evaporator cavity.

2. The return air assembly for a refrigerator according to claim 1, characterized in that: When the auxiliary return air duct is arranged on the side of the insulation board facing the return air cover plate, The auxiliary return air duct includes a first groove duct, which is formed by at least a portion of the surface of the insulation board facing the return air cover plate being recessed; The return air cover plate is correspondingly provided with an auxiliary return air port which is communicated with the first groove air duct so that the airflow of the storage cavity flows into the first groove air duct through the auxiliary return air port.

3. The return air assembly for a refrigerator according to claim 2, characterized in that: The return air cover plate includes a top plate and a side plate, the side plate is connected to one end of the top plate and extends downward; the insulation plate includes a top wall and a side wall, the side wall is connected to one end of the top wall and extends downward; the top plate is correspondingly arranged with the top wall, and the side plate is correspondingly arranged with the side wall; The first groove air duct includes a first top air duct, which is arranged on the top wall of the insulation board; the auxiliary return air port includes a first auxiliary return air port, which is arranged on the top plate of the return air cover plate and is correspondingly connected to the first top air duct; and / or, The first groove air duct includes a first side wall air duct, which is arranged on the side wall of the insulation board; the auxiliary return air port includes a second auxiliary return air port, which is arranged on the side plate of the return air cover plate and is correspondingly connected to the first side wall air duct.

4. The return air assembly for a refrigerator according to claim 3, characterized in that: In the case where the top plate of the return air cover is provided with a first auxiliary return air port, a plurality of first auxiliary return air ports extend along the first direction and are arranged on the top plate at intervals along the second direction, and the return air cover further comprises: A first cover plate is provided to cover the first auxiliary air return port, is connected to the top plate, and is provided to protrude from the first auxiliary air return port in a direction away from the evaporator chamber, and a first gap is provided between a side surface of the first cover plate and the first auxiliary air return port, so that airflow in the storage chamber flows into the evaporator chamber through the first gap; The first direction is the length or width direction of the return air cover plate, and the second direction is a direction perpendicular to the first direction.

5. The return air assembly for a refrigerator according to any one of claims 3 or 4, characterized in that: In the case where the top plate of the return air cover is provided with a first auxiliary return air port, the return air cover further comprises: The waterproof platform is arranged on the top plate, located on two opposite sides of the first auxiliary air return outlet, extending in the same direction as the first auxiliary air return outlet and protruding upward; When the return air cover plate includes a first cover plate, the waterproof platform protrudes upward to cover the lower edge of the first gap.

6. The return air assembly for a refrigerator according to claim 3, characterized in that: In the case where the side plate of the return air cover is provided with a second auxiliary return air port, the return air cover further comprises: The grille structure is arranged at the second auxiliary air return port and connected to the side panel. The grille structure includes a plurality of first bars, which are arranged in sequence at the second auxiliary air return port and protrude toward the storage cavity. The protruding lengths of every two adjacent first bars are different.

7. The return air assembly for a refrigerator according to claim 1, characterized in that: When the auxiliary return air duct is arranged on the return air cover, the auxiliary return air duct includes: The second groove air duct, the outer surface of the return air cover is provided with a plurality of convex rib structures arranged at intervals, and a second groove air duct is formed between adjacent convex rib structures. The second groove air duct is connected with the main return air outlet so that the airflow in the storage cavity can flow into the main return air outlet through the second groove air duct.

8. The return air assembly for a refrigerator according to claim 7, characterized in that: The main return air inlet extends along the first direction, and a second cover plate is provided on the outer side of the main return air inlet. The second cover plate is arranged to protrude from the main return air inlet in a direction away from the evaporator cavity, and a second gap is provided between the side surface of the second cover plate and the main return air inlet, so that the airflow of the storage cavity flows into the evaporator cavity through the second gap; A plurality of convex rib structures extend along the second direction toward the main air return port, and the second groove air duct is arranged corresponding to the second gap, so that the airflow of the storage cavity flows into the second gap through the second groove air duct.

9. The return air assembly for a refrigerator according to claim 7, characterized in that: There are multiple main return air vents, which extend along the second direction and are spaced apart along the first direction; a third cover plate is provided on the outer side of each main return air vent, which is protruded from the main return air vent in a direction away from the evaporator cavity, and a third gap is provided between the side of the third cover plate and the main return air vent, so that the airflow of the storage cavity flows into the evaporator cavity through the third gap, and an airflow channel is formed between adjacent third cover plates; Each rib structure extends along the second direction toward the third cover plate, so that at least a portion of each second ventilation groove communicates with the air flow channel.

10. A refrigerator, characterized in that: include: A return air assembly for a refrigerator according to any one of claims 1 to 9.

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