Air circulation device and direct cooling refrigerator

Abstract

The invention belongs to the technical field of refrigeration equipment, and particularly provides an air circulation device and a direct cooling refrigerator. The problem that an existing direct cooling refrigerator is prone to frosting is solved. Therefore, the air circulation device comprises a shell, a centrifugal fan and a plurality of drainage plates. Wherein an air inlet cavity and a fan cavity communicated with the air inlet cavity are defined in the shell, and an air inlet communicated with the air inlet cavity and an air outlet communicated with the fan cavity are further formed in the shell. The centrifugal fan is arranged in the fan cavity and used for driving air to sequentially flow through the air inlet, the air inlet cavity, the fan cavity and the air outlet. The multiple drainage plates are arranged at the air outlet and used for enabling air to be evenly blown out from the air outlet. When the air circulation device is applied to the direct-cooling refrigerator, air in the direct-cooling refrigerator can be driven to flow circularly, so that the temperature in the direct-cooling refrigerator is uniformly distributed, and the phenomenon that the area, close to an evaporator, in the direct-cooling refrigerator is frosted due to the too low temperature is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of refrigeration equipment, and particularly provides an air circulation device and a direct-cooling refrigerator. BACKGROUND

[0002] The direct-cooling refrigerator, also known as a natural convection refrigerator, is a refrigerator that cools articles in the refrigerator by natural convection.

[0003] The evaporator of the direct-cooling refrigerator is generally arranged on the outside or the inside of the side wall of the storage compartment, so as to transfer the cold energy of the evaporator to the storage compartment by heat conduction, and then cool the articles in the storage compartment by natural convection.

[0004] Since the direct-cooling refrigerator cools by natural convection, the temperature distribution in the storage compartment is uneven, the temperature near the evaporator is low, frost is easy to form, and the temperature far from the evaporator is high. When the frost layer is thick, the frost layer will affect the transfer of cold energy, thereby affecting the refrigeration effect of the direct-cooling refrigerator, increasing the energy consumption of the direct-cooling refrigerator, and even damaging the direct-cooling refrigerator. Therefore, the user needs to clean the frost layer in the storage compartment regularly, and the user experience is poor. SUMMARY

[0005] An object of the present application is to solve the problem of frost formation in the existing direct-cooling refrigerator.

[0006] To achieve the above object, the present application provides, in a first aspect, an air circulation device suitable for a direct-cooling refrigerator, the air circulation device comprising:

[0007] a housing defining an air inlet cavity and a fan cavity communicating with the air inlet cavity, the housing further being provided with an air inlet opening communicating with the air inlet cavity and an air outlet opening communicating with the fan cavity;

[0008] a centrifugal fan arranged in the fan cavity for driving air to flow through the air inlet opening, the air inlet cavity, the fan cavity and the air outlet opening in sequence;

[0009] a plurality of guide plates arranged at the air outlet opening for uniformly blowing air out of the air outlet opening.

[0010] Optionally, the air inlet cavity is provided with an open mouth away from the fan cavity, and the circumferential edge of the open mouth is used to abut the peripheral wall of the storage compartment of the direct-cooling refrigerator, so that the negative pressure generated by the centrifugal fan when the centrifugal fan is working attracts the air circulation device to the peripheral wall of the storage compartment or forms an air cushion between the air circulation device and the peripheral wall of the storage compartment.

[0011] Optionally, the air inlet cavity comprises an axial cavity portion and a radial cavity portion, the axial cavity portion is located at the top side of the fan cavity in the axial direction of the centrifugal fan, and the radial cavity portion is located at the front side of the fan cavity in the radial direction of the centrifugal fan, at least one of the left side of the axial cavity portion, the right side of the axial cavity portion and the bottom side of the radial cavity portion is provided with the air inlet.

[0012] Optionally, the air inlet is provided as a plurality of rows of strip-shaped holes, and the lengths of the strip-shaped holes in the same row are different.

[0013] Optionally, the spacing structure between the two adjacent strip-shaped holes in the same row is aligned with one of the strip-shaped holes in the adjacent row.

[0014] Optionally, the air outlet is arranged at the rear side of the shell; and / or the air outlet is configured to tilt the air blown therefrom downward.

[0015] Optionally, a plurality of the flow guide plates are sequentially and spacedly arranged in the transverse direction of the air outlet, and the spacing between the two adjacent flow guide plates is referred to as a plate spacing; in the transverse direction of the air outlet, the plate spacing on the side closer to the air outlet where the air pressure is larger is smaller, and the plate spacing on the side closer to the air outlet where the air pressure is smaller is larger.

[0016] Optionally, along the direction in which the air pressure at the air outlet gradually decreases, the plate spacing first gradually increases and then becomes equal; and / or in the transverse direction of the air outlet, the thickness of the flow guide plate on the side closer to the air outlet where the air pressure is larger is larger, and the thickness of the flow guide plate on the side closer to the air outlet where the air pressure is smaller is smaller; and / or the portions on the two sides of the plurality of flow guide plates in the transverse direction are inclined outward to increase the transverse width of the air flow blown from the air outlet.

[0017] Optionally, the shell comprises a main shell and a bottom shell, the air inlet cavity and the air inlet are formed on the main shell, and the fan cavity and the air outlet are formed between the main shell and the bottom shell.

[0018] The present application provides, in a second aspect, a direct-cooling refrigerator, comprising:

[0019] a cabinet defining at least one storage compartment;

[0020] The air circulation device of any one of the first aspect is arranged in the storage compartment, and is used to drive the air in the storage compartment to circulate and flow, so as to prevent frost from forming on the side wall of the storage compartment.

[0021] Based on the foregoing description, those skilled in the art can understand that, in the foregoing technical solutions of the present application, by providing the air circulation device suitable for the direct-cooling refrigerator, the air in the direct-cooling refrigerator (in particular, the storage compartment) can circulate under the action of the air circulation device; thereby, the temperature in the direct-cooling refrigerator presents a uniform distribution phenomenon with the circulation of the air, avoiding the frosting phenomenon in the area close to the evaporator in the direct-cooling refrigerator due to the excessively low temperature. By defining the air inlet, the air inlet cavity, the fan cavity and the air outlet in the casing in sequence, the air can flow through the air inlet, the air inlet cavity, the fan cavity and the air outlet in sequence under the action of the centrifugal fan. In particular, the air inlet cavity arranged between the air inlet and the fan cavity can form a negative pressure area when the centrifugal fan rotates, so that the air entering from the air inlet can be uniformly diffused in the air inlet cavity, and each area of the centrifugal fan can attract air, improving the air suction effect of the centrifugal fan. By arranging the guide plate at the air outlet, the air can be uniformly blown out from the air outlet, avoiding the large wind noise at the air outlet due to the excessively large local wind speed.

[0022] Further, by arranging the air inlet cavity to be open away from the fan cavity, and enabling the circumferential edge of the air inlet cavity to abut against the circumferential wall of the storage compartment of the direct-cooling refrigerator, the air circulation device can be attracted to the circumferential wall of the storage compartment by the negative pressure generated when the centrifugal fan works, or an air cushion is formed between the air circulation device and the circumferential wall of the storage compartment. In this way, not only the gravity of the air circulation device is offset, the reliability of the connection between the air circulation device and the circumferential wall of the storage compartment is strengthened, but also the air inlet area of the air circulation device is increased. At the same time, the air cushion formed between the air circulation device and the circumferential wall of the storage compartment can also play a role in shock absorption, thereby reducing the noise when the air circulation device operates.

[0023] Further, by making the plate spacing (the spacing between two adjacent guide plates) on the side close to the air outlet where the wind pressure is larger smaller, and the plate spacing on the side close to the air outlet where the wind pressure is smaller larger, the flow rate and flow velocity of the air flow at each plate spacing are as same as possible, thereby making the air flow blown out of the air outlet more uniform.

[0024] Further, along the direction of the wind pressure from large to small at the air outlet, by making the plate spacing gradually larger first and then equal, the technical prejudice that the wind pressure at the air outlet must change continuously in the transverse direction and the plate spacing must change continuously is overcome.

[0025] Further, in the transverse direction of the air outlet, by making the thickness of the guide plate on the side close to the air outlet where the wind pressure is larger larger, the vibration of the guide plate when it is impacted by the faster air flow is avoided. By making the thickness of the guide plate on the side close to the air outlet where the wind pressure is smaller smaller, the obstruction of the guide plate to the air flow is reduced.

[0026] Other beneficial effects of the present invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the improved objectives, features and advantages of the present invention. Attached Figure Description

[0027] To more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that the same reference numerals may indicate the same or similar parts or components in different drawings; the drawings of the present invention are not necessarily drawn to scale.

[0028] In the attached image:

[0029] Figure 1 This is a three-dimensional schematic diagram of a direct-cooling refrigerator provided by the present invention;

[0030] Figure 2 yes Figure 1 A partial sectional view of a direct-cooling refrigerator along the AA direction;

[0031] Figure 3 yes Figure 1 A partial 3D rendering of the ceiling wall of the storage compartment in a direct-cooling refrigerator;

[0032] Figure 4 This is a first exploded view of the air circulation device in some embodiments of the present invention;

[0033] Figure 5 This is a second exploded view of the air circulation device in some embodiments of the present invention;

[0034] Figure 6 This is a third exploded view of the air circulation device in some embodiments of the present invention;

[0035] Figure 7 yes Figures 4 to 6 First isometric view of the air circulation device;

[0036] Figure 8 yes Figures 4 to 6 Second isometric view of the air circulation device;

[0037] Figure 9 yes Figures 4 to 6 Third axonometric view of the air circulation device;

[0038] Figure 10 yes Figure 7 Cross-sectional view of the air circulation device along the BB direction;

[0039] Figure 11 yes Figure 7 A cross-sectional view of the housing of the air circulation device along the BB direction;

[0040] Figure 12 is Figure 7 A cross-sectional view of the hollow air circulation device along the C-C direction;

[0041] Figure 13 is Figures 4 to 12 A first axonometric view of the main housing;

[0042] Figure 14 is Figures 4 to 12 A second axonometric view of the main housing;

[0043] Figure 15 is Figure 14 A cross-sectional view of the main housing along the D-D direction;

[0044] Figure 16 is Figures 4 to 12 A third axonometric view of the main housing;

[0045] Figure 17 is Figures 4 to 6 An axonometric view of the sterilization module;

[0046] Figure 18 is an axonometric view of the sterilization module in other embodiments of the invention.

[0047] BRIEF DESCRIPTION OF THE DRAWINGS:001, direct-cooling refrigerator;

[0048] 100, cabinet; 110, storage compartment; 111, windward side wall; 112, sink; 113, first quick-release structure; 1131, end cap; 114, first connecting structure;

[0049] 200, door body; 201, transparent area;

[0050] 300, air circulation device; 301, main body; 302, extension;

[0051] 310, housing; 310a, main housing; 310b, bottom housing; 3101, air inlet; 31011, strip-shaped hole; 3102, air outlet; 3103, open mouth; 3104, fan cavity; 3105, air inlet cavity; 31051, axial cavity portion; 31502, radial cavity portion; 3106, illumination cavity; 3107, confluence cavity; 311, second quick-release structure; 312, second connecting structure; 313, spacing structure;

[0052] 321, centrifugal fan; 322, fixed support;

[0053] 330, drainage plate; 331, plate spacing;

[0054] 340, sterilization module; 341, air vent; 342, positive electrode component; 343, negative electrode component; 344, outer frame;

[0055] 350, lighting module;

[0056] 360, light-transmitting cover; 3601, air inlet structure; 361, upper inclined plate; 362, lower inclined plate;

[0057] 370, atmosphere lamp;

[0058] 380, light guide cover; 381, transverse portion; 382, longitudinal portion; 383, linking portion; 384, upwardly curved portion;

[0059] 390, rotation speed sensor;

[0060] 400, evaporator. DETAILED DESCRIPTION

[0061] It should be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments of the present application, and are intended to explain the technical principles of the present application, rather than limit the protection scope of the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor shall fall within the protection scope of the present application.

[0062] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0063] Further, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. For example, the terms "mounting", "connecting", "connection" and "fixing" can be any feasible connection form such as bolt connection, screw connection, welding, insertion, riveting, fusion, clamping, etc. without special description.

[0064] Further, it should be noted that in the description of the present application, the terms "cold" and "heat" are two descriptions of the same physical state. That is, the higher the "cold" a certain target (e.g. an evaporator, air, a condenser, etc.) has, the lower the "heat" it has, and the lower the "cold" a certain target has, the higher the "heat" it has. A certain target absorbs "cold" while releasing "heat", and releases "cold" while absorbing "heat". A certain target preserves "cold" or "heat" so as to keep the target at the current temperature. "Refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon, that is, a certain target (e.g. an evaporator) absorbs heat while refrigerating.

[0065] Since the air circulation device provided by the present application is suitable for a direct-cooling refrigerator, the air circulation device of the present application will be described in detail below with reference to the accompanying drawings and in combination with a direct-cooling refrigerator, so as to facilitate the understanding of the air circulation device provided by the present application by those skilled in the art.

[0066] As shown in Figure 1 , in the present application, the direct-cooling refrigerator 001 comprises a cabinet 100, a door body 200, an air circulation device 300, and an evaporator 400 for refrigeration.

[0067] The cabinet 100 defines at least one storage compartment 110. The at least one storage compartment 110 comprises at least one of a refrigeration compartment, a freezing compartment, and a variable-temperature compartment.

[0068] The door body 200 is rotatably installed on the cabinet 100 and is used to shield the storage compartment 110. Those skilled in the art can make one door body 200 correspond to one storage compartment 110, or make one door body 200 correspond to two or more storage compartments 110 according to needs.

[0069] The air circulation device 300 is installed on the inner top of the storage compartment 110. Those skilled in the art can configure at least one air circulation device 300 for each storage compartment 110, or configure at least one air circulation device 300 for at least one of all the storage compartments 110 according to needs.

[0070] The evaporator 400 is installed on the cabinet 100 and is used to provide cold to the storage compartment 110.

[0071] As shown in Figure 2 , in the present application, the top wall of the storage compartment 110 is provided with a sink 112, and the air circulation device 300 is installed in the sink 112 to hide a part of the air circulation device 300, so as to optimize the aesthetics of the direct-cooling refrigerator 001 and avoid the user from bumping into the air circulation device 300 when taking or placing articles.

[0072] Further, the sink 112 extends rearward to the rear side wall of the storage compartment 110 so that the installation position of the air circulation device 300 is as rear as possible.

[0073] Optionally, the sink 112 is located in the middle of the storage compartment 110 in the lateral direction so that the air circulation device 300 can also be located in the middle of the storage compartment 110 in the lateral direction, thereby enabling the air driven thereby to flow uniformly in the storage compartment 110.

[0074] Optionally, the depth of the front portion of the sink 112 gradually decreases from rear to front, and the height of the front portion of the air circulation device 300 gradually decreases from rear to front, so as to reasonably arrange the components in the air circulation device 300.

[0075] Of course, the skilled person can also omit the sink 112 as needed, but in this case, the air circulation device 300 will be more prominent, affecting the aesthetics of the direct-cooling refrigerator 001, and even affecting the storage volume of the direct-cooling refrigerator 001.

[0076] As shown in Figure 2 , in the present application, the air circulation device 300 includes a housing 310 and a centrifugal fan 321.

[0077] Continuing to refer to Figure 2 , the housing 310 has an air inlet 3101 and an air outlet 3102. The side wall of the storage compartment 110 opposite to the air outlet 3102 is referred to as the windward side wall 111 (as shown in the rear side wall of the storage compartment 110 in Figure 1 and Figure 2 ), and the air outlet 3102 is inclined downward toward the direction close to the windward side wall 111.

[0078] In the present application, the windward side wall 111 corresponds to at least a portion of the evaporator 400. In other words, the evaporator 400 is arranged at the windward side wall 111, and at least a portion of the evaporator 400 is mounted to the outside or the inside of the windward side wall 111, so that the windward side wall 111 can receive the cold of the evaporator 400 and is relatively low in temperature.

[0079] As can be seen from Figure 2 , in the present application, the air circulation device 300 is arranged at the rear of the inner top of the storage compartment 110 so that the housing 310 is as close as possible to the windward side wall 111, reducing the gap between the air outlet 3102 (located at the rear of the housing 310) and the windward side wall 111.

[0080] Continuing to refer to Figure 2The centrifugal fan 321 is arranged in the housing 310 and is used to drive the air in the storage compartment 110 to enter the housing 310 from the air inlet 3101 and make the air outlet 3102 blow the air flow obliquely downward and toward the windward side wall 111, so that the air flow flows downward along the windward side wall 111, thereby preventing the windward side wall 111 from frosting.

[0081] Continuing to refer to Figure 2 An angle between a tangent line of the bottom wall of the air outlet 3102 and the windward side wall 111 is denoted as α, and 10°≤α≤75°. An angle between the tangent line of the bottom wall of the air outlet 3102 and a tangent line of the top wall is denoted as β, and 5°≤β≤175°.

[0082] In the present application, α and β are used to make the air flow blown from the air outlet 3102 flow through more areas of the windward side wall 111 along the surface of the windward side wall 111 in the vertical direction.

[0083] Further, 15°≤α≤45° and / or 15°≤β≤165°.

[0084] Exemplarily, α can be 10°, 15°, 20°, 30°, 45°, 60°, 75°, etc. β can be 5°, 10°, 15°, 20°, 30°, 45°, 60°, 75°, 110°, 156°, 165°, 175°, etc.

[0085] Further, α and β satisfy the following functional relationship:

[0086] α=(β+w÷w1-b)÷h×h1

[0087] wherein w is a width of the air circulation device 300 (as shown in Figure 1 ), and h is a height of the air circulation device 300 (as shown in Figure 2 ).

[0088] wherein w1 is any value selected from 200mm to 500mm, such as 200mm, 222mm, 250mm, 350mm, 398mm, 456mm, 480mm, 500mm, etc.

[0089] wherein h1 is any value selected from 40mm to 60mm, such as 40mm, 42mm, 550mm, 60mm, etc.

[0090] wherein b is any value selected from 10° to 15°, such as 10°, 11°, 13°, 14.5°, 15°, etc.

[0091] In the present application, the α and β satisfying the above function relationship can make the airflow sent out from the air outlet 3102 cover the area of the windward side wall 111 corresponding to the evaporator 400 as much as possible. That is, the area of the windward side wall 111 corresponding to the evaporator 400 can be blown by the airflow sent out from the air outlet 3102, so that the cold quantity of the area is taken away by the airflow to prevent frosting.

[0092] As shown in Figure 2 and Figure 3 In the present application, the top of the storage compartment 110 provided with the air circulation device 300 is provided with a first quick-release structure 113 and a first connecting structure 114 to fix the air circulation device 300 through the first quick-release structure 113 and the first connecting structure 114. Specifically, the air circulation device 300 can be first connected together or pre-fixed together with the cabinet 100 through the first quick-release structure 113, and then the air circulation device 300 is completely fixed to the cabinet 100 through the first connecting structure 114.

[0093] As can be seen from Figure 2 and Figure 3 The first quick-release structure 113 and the first connecting structure 114 are arranged on the top wall of the sink 112 to ensure that the air circulation device 300 can be installed into the sink 112.

[0094] As shown in Figure 3 The first quick-release structure 113 can be a cylindrical structure with an end cap 1131, and the first connecting structure 114 can be a threaded hole. Moreover, the number of the first quick-release structure 113 and the first connecting structure 114 is not limited to two as shown in Figure 3 It can also be one, three, four, five, etc. other any feasible number.

[0095] In addition, the first quick-release structure 113 can also be set to other any feasible structure according to the needs of those skilled in the art, such as a slot, a buckle, a magnet, a sliding rail, etc.

[0096] Correspondingly, the first connecting structure 114 can also be set to other any feasible structure according to the needs of those skilled in the art, such as a threaded column, a buckle, a magnet, etc.

[0097] On the premise that the air circulation device 300 can be fixed to the cabinet 100, at least one of the first quick-release structure 113 and the first connecting structure 114 can also be omitted according to the needs of those skilled in the art. For example, both the first quick-release structure 113 and the first connecting structure 114 are omitted, and the air circulation device 300 is adhered to the cabinet 100 by other adhesive materials such as glue, double-sided tape, etc.

[0098] The following will be described with reference to Figures 4 to 18The air circulation device 300 in the present application will be further illustrated.

[0099] As shown in Figures 4 to 7 , Figures 9 to 11 , Figures 13 to 16 , in some embodiments of the present application, the shell 310 is provided with a second quick-release structure 311 matched with the first quick-release structure 113, so that the air circulation device 300 is installed on the cabinet 100 through the second quick-release structure 311.

[0100] Further, the second quick-release structure 311 is provided in a U-shaped structure, so that the first quick-release structure 113 and the second quick-release structure 311 are inserted together in a plug-in manner.

[0101] Specifically, the cylindrical structure of the first quick-release structure 113 is inserted into the U-shaped structure and makes the end cap 1131 stopper the U-shaped structure in the vertical direction, so as to realize the plug-in of the first quick-release structure 113 and the second quick-release structure 311.

[0102] In addition, in other embodiments of the present application, the person skilled in the art can also set the second quick-release structure 311 to be the cylindrical structure with the end cap 1131 of the first quick-release structure 113 shown in Figure 3 , and set the first quick-release structure 113 to be the U-shaped structure of the second quick-release structure 311 shown in Figure 4 .

[0103] As shown in Figures 4 to 7 , in some embodiments of the present application, the second quick-release structure 311 is arranged at the rear top of the air circulation device 300, so as to adapt to the first quick-release structure 113 arranged at the rear side of the top wall of the storage compartment 110.

[0104] Of course, the person skilled in the art can also adjust the arrangement positions of the second quick-release structure 311 and the first quick-release structure 113 as needed, for example, arrange the second quick-release structure 311 at the front side or the middle position of the top of the air circulation device 300.

[0105] As shown in Figures 4 to 7 , Figures 9 to 11 , Figure 13 and Figure 16 , in some embodiments of the present application, the shell 310 is provided with a second connecting structure 312 matched with the first connecting structure 114, so that the air circulation device 300 is fixed on the cabinet 100 through the first connecting structure 114 and the second connecting structure 312.

[0106] In some embodiments of the present application, the air circulation device 300 is first preassembled to the cabinet 100 through the first quick-release structure 113 and the second quick-release structure 311, and then fixed to the cabinet 100 through the first connecting structure 114 and the second connecting structure 312, which not only facilitates the installation and disassembly of the air circulation device 300, but also realizes the fixation between the air circulation device 300 and the cabinet 100.

[0107] Further, the second connecting structure 312 is a through hole to be aligned with the first connecting structure 114 which is a threaded hole, so that the bolt or screw is tightened with the threaded hole after penetrating through the through hole, thereby fixing the air circulation device 300 to the cabinet 100.

[0108] In addition, in other embodiments of the present application, the skilled in the art can also omit the setting of the second connecting structure 312 according to the needs, and make the air circulation device 300 only installed on the cabinet 100 through the first quick-release structure 113 and the second quick-release structure 311. For example, at least one second quick-release structure 311 is arranged on the front side and the rear side of the shell 310, or other types of quick-release structures are arranged on the front side of the shell 310, so as to fixedly install the air circulation device 300 on the cabinet 100.

[0109] As shown in Figure 4 、 Figure 7 、 Figure 11 、 Figures 13 to 16 In some embodiments of the present application, the top side of the shell 310 is provided with an opening 3103 which is in communication with the air inlet side of the centrifugal fan 321, and the circumferential edge of the opening 3103 abuts or is adjacent to the top wall of the storage compartment 110, so that the negative pressure generated by the centrifugal fan 321 when working will attract the air circulation device 300 to the top wall of the storage compartment 110 or form an air cushion between the air circulation device 300 and the top wall of the storage compartment 110.

[0110] Wherein, the circumferential edge of the opening 3103 abutting the top wall of the storage compartment 110 can be that part of the circumferential edge of the opening 3103 or the entire circumferential edge abutting the top wall of the storage compartment 110.

[0111] Wherein, the circumferential edge of the opening 3103 adjacent to the top wall of the storage compartment 110, specifically, the spacing between the circumferential edge and the top wall is less than a set value, the set value is not greater than 10mm, preferably not greater than 5mm, further preferably not greater than 3mm, and further preferably not greater than 1mm.

[0112] The skilled in the art can understand that the arrangement of the opening 3103, especially when a part of the circumferential edge of the opening 3103 abuts against or is adjacent to the top wall of the storage compartment 110, enables the air circulation device 300 to also suck air onto the top wall of the storage compartment 110 by means of the negative pressure generated when the centrifugal fan 321 is working, offsetting a part of the gravity of the air circulation device 300, not only strengthening the reliability of the connection of the air circulation device 300 with the cabinet 100, but also increasing the air inlet area of the air circulation device 300. At the same time, the air cushion formed between the air circulation device 300 and the top wall of the storage compartment 110 can also play a role in shock absorption, thereby reducing the noise when the air circulation device 300 is running.

[0113] As shown in Figures 4 to 7 , Figures 10 to 16 , in some embodiments of the present application, the shell 310 can further define a fan cavity 3104 and an air inlet cavity 3105 located on the top side of the fan cavity 3104, and the opening 3103 is formed on the top side of the air inlet cavity 3105. And the air inlet 3101 of the air circulation device 300 is formed on the circumferential wall of the air inlet cavity 3105, and the air outlet 3102 of the air circulation device 300 is formed on the area where the shell 310 communicates with the fan cavity 3104.

[0114] As shown in Figure 4 , Figures 10 to 13 and Figure 16 , in some embodiments of the present application, the air inlet cavity 3105 can include an axial cavity portion 31051 and a radial cavity portion 31502, the axial cavity portion 31051 is located on the top side of the fan cavity 3104 in the axial direction of the centrifugal fan 321, and the radial cavity portion 31502 is located on the front side of the fan cavity 3104 in the radial direction of the centrifugal fan 321.

[0115] Among them, the left side and the right side of the axial cavity portion 31051 and the bottom side of the radial cavity portion 31502 are respectively provided with air inlets 3101.

[0116] In other embodiments of the present application, the skilled in the art can also arrange the air inlets 3101 on only one or two of the left side and the right side of the axial cavity portion 31051 and the bottom side of the radial cavity portion 31502 according to needs.

[0117] As shown in Figures 4 to 11 , Figures 13 to 16 , in some embodiments of the present application, the air inlets 3101 are arranged as multiple rows of strip-shaped holes 31011, and the lengths of the strip-shaped holes 31011 in the same row are different. And optionally, the spacing structure 313 between the adjacent two strip-shaped holes 31011 in the same row is aligned with one strip-shaped hole 31011 in the adjacent row.

[0118] The person skilled in the art can understand that the above-mentioned form of the air inlet 3101 can optimize the appearance of the air circulation device 300, so that the air circulation device 300 looks more beautiful as a whole.

[0119] As shown in the drawings, Figures 4 to 11 In some embodiments of the present application, the shell 310 can include a main shell 310a and a bottom shell 310b, the air inlet cavity 3105 and the air inlet 3101 are formed on the main shell 310a, and the fan cavity 3104 and the air outlet 3102 are formed between the main shell 310a and the bottom shell 310b. The main shell 310a and the bottom shell 310b can be fixedly connected together in any feasible manner, such as welding, screwing, bonding, inserting, clamping, etc.

[0120] The person skilled in the art can understand that the above-mentioned form of the shell 310 not only facilitates the production and manufacture of the shell 310, but also facilitates the installation of the centrifugal fan 321.

[0121] As shown in the drawings, Figures 4 to 10 In some embodiments of the present application, the air circulation device 300 further includes a fixing bracket 322, a flow guide plate 330, a sterilization module 340, an illumination module 350, a light-transmitting cover 360, an atmosphere lamp 370 and a light guide cover 380.

[0122] The fixing bracket 322 is used to fix the centrifugal fan 321 to the shell 310, the flow guide plate 330 is used to make the air blow out uniformly from the air outlet 3102, the sterilization module 340 is used to sterilize the air flowing through the air circulation device 300, the illumination module 350 is used to provide illumination for the storage compartment 110 where the air circulation device 300 is located, the light-transmitting cover 360 is used to shield and hide the illumination module 350, the atmosphere lamp 370 is used to provide atmosphere light for the storage compartment 110 where the air circulation device 300 is located, and the light guide cover 380 is used to make the light emitted by the atmosphere lamp 370 diffuse uniformly.

[0123] In addition, in other embodiments of the present application, the person skilled in the art can also omit at least one of the flow guide plate 330, the sterilization module 340, the illumination module 350, the light-transmitting cover 360, the atmosphere lamp 370 and the light guide cover 380 according to actual needs.

[0124] The fixing bracket 322, the flow guide plate 330, the sterilization module 340, the illumination module 350, the light-transmitting cover 360, the atmosphere lamp 370 and the light guide cover 380 will be described one by one below in combination with the drawings.

[0125] As shown in the drawings, Figures 4 to 6 and Figure 10As shown, in some embodiments of the present application, the fixing support 322 is fixedly connected (e.g. bolted, screwed, clamped, riveted, etc.) with the casing 310 and the centrifugal fan 321 respectively, so as to fix the centrifugal fan 321 to the casing 310. Further, the fixing support 322 is fixedly connected with at least one of the main casing 310a and the bottom casing 310b. Alternatively, the fixing support 322 can be integrally formed with one of the main casing 310a and the bottom casing 310b as needed by those skilled in the art. Alternatively, the fixing support 322 can be integrally formed with the non-rotating part of the centrifugal fan 321.

[0126] As shown in Figure 5 , Figure 6 , Figures 9 to 12 , Figure 14 and Figure 15 , a plurality of flow guide plates 330 are arranged at the air outlet 3102, and the plurality of flow guide plates 330 are sequentially and spacedly distributed in the transverse direction of the air outlet 3102.

[0127] Further, the plurality of flow guide plates 330 can be fixedly connected with or integrally formed with the casing 310, especially the main casing 310a. The fixed connection includes bonding, insertion, welding, etc.

[0128] As shown in Figure 12 , if the interval between two adjacent flow guide plates 330 is denoted as plate interval 331, then in the transverse direction of the air outlet 3102, the plate interval 331 near the side with larger air pressure at the air outlet 3102 is smaller, and the plate interval 331 near the side with smaller air pressure at the air outlet 3102 is larger.

[0129] Those skilled in the art can understand that, by arranging the plurality of flow guide plates 330 at the air outlet 3102, the airflow blown out of the air outlet 3102 can be divided into multiple streams in the transverse direction. By making the plate interval 331 near the side with larger air pressure at the air outlet 3102 smaller and the plate interval 331 near the side with smaller air pressure at the air outlet 3102 larger, the flow rate and flow speed of each airflow are made as equal as possible, so that the airflow blown out of the air outlet 3102 is more uniform.

[0130] Continuing to refer to Figure 12 , along the direction of air pressure from large to small at the air outlet 3102, the plate interval 331 first gradually increases and then becomes equal. Moreover, the proportion of the equal plate interval 331 in all plate intervals 331 is selected from any value in the range of 0.4 to 0.6 (e.g. 0.4, 0.45, 0.5, 0.58, 0.6, etc.), so that the flow speed of the airflow blown out of each plate interval 331 is made as equal as possible.

[0131] Further, any one of the plate intervals 331 is selected from any one of 2mm to 20mm (e.g. 2mm, 3mm, 5mm, 6mm, 8mm, 9mm, 10mm, 12mm, 15mm, 18mm, 20mm, etc.), and in particular can be selected from any one of 5mm to 10mm, so as to ensure that the flow rates of the airflows blown from the respective plate intervals 331 are as equal as possible, while also avoiding that the plate intervals 331 are too small, which would cause a greater hindrance to the airflows.

[0132] With continued reference to Figure 12 In the transverse direction of the air outlet 3102, the thickness of the flow guide plate 330 on the side closer to the air outlet 3102 where the air pressure is greater is greater, and the thickness of the flow guide plate 330 on the side closer to the air outlet 3102 where the air pressure is smaller is smaller.

[0133] As can be understood by those skilled in the art, in the transverse direction of the air outlet 3102, by making the thickness of the flow guide plate 330 on the side closer to the air outlet 3102 where the air pressure is greater greater, vibration of the flow guide plate 330 when impacted by the faster airflow is avoided. By making the thickness of the flow guide plate 330 on the side closer to the air outlet 3102 where the air pressure is smaller smaller, the hindrance of the flow guide plate 330 to the airflow is reduced.

[0134] Further, the thickness of any one of the flow guide plates 330 is selected from any one of 0.5mm to 3mm, e.g. 0.5mm, 08mm, 1mm, 1.2mm, 1.5mm, 2mm, 2.5mm, 3mm, etc.

[0135] As shown in Figures 4 to 7 and Figure 10 In some embodiments of the present application, the sterilization module 340 is arranged in the air inlet cavity 3105, for sterilizing and / or deodorizing the air in the air inlet cavity 3105.

[0136] As shown in Figure 7 and Figure 10 In some embodiments of the present application, the sterilization module 340 is aligned with the air inlet 3101, so that the air entering the air inlet cavity 3105 from the air inlet 3101 flows through the sterilization module 340.

[0137] Further, those skilled in the art can make each air inlet 3101 correspond to at least one sterilization module 340, or make one or more of all the air inlets 3101 correspond to at least one sterilization module 340, as needed.

[0138] Further, in some embodiments of the present application, the sterilization module 340 is a structure made of a material having a sterilization function. The material having a sterilization function includes copper ions or silver ions.

[0139] AsFigure 17 As shown, in some embodiments of the present application, the sterilization module 340 is provided with a plurality of ventilation holes 341 allowing air to flow therethrough, so as to increase the contact area between the sterilization module 340 and the air.

[0140] In addition, in other embodiments of the present application, the sterilization module 340 can be provided in any other feasible structure or device according to the needs of those skilled in the art, such as a negative ion sterilization device, an ultraviolet sterilization device, an electrostatic sterilization device, an ozone sterilization device.

[0141] Exemplarily, in some embodiments of the present application, the sterilization module 340 is provided with a plurality of ventilation holes 341 allowing air to flow therethrough, so as to increase the contact area between the sterilization module 340 and the air. Figure 18 As shown in some other embodiments of the present application, the sterilization module 340 comprises a positive electrode member 342 and a negative electrode member 343, so that the sterilization module 340 sterilizes and deodorizes air by electrostatic adsorption when the positive electrode member 342 and the negative electrode member 343 are electrified. Specifically, the positive electrode member 342 and the negative electrode member 343 are electrified with high voltage, and particles or molecules in the air are adsorbed onto the positive electrode member 342 or the negative electrode member 343 under the action of the electric field and are destroyed by the high voltage charge, thereby achieving the purpose of sterilization and deodorization.

[0142] Continuing to refer to Figure 18 , the positive electrode member 342 and the negative electrode member 343 are comb-tooth structures staggered with each other, and the sterilization module 340 further comprises an outer frame 344 provided outside the positive electrode member 342 and the negative electrode member 343. The outer frame 344 is used to fix the positive electrode member 342 and the negative electrode member 343, so that the positive electrode member 342 and the negative electrode member 343 are spaced apart from each other. Moreover, the outer frame 344 is made of insulating material.

[0143] As shown in some embodiments of the present application, Figures 4 to 7 and Figure 10 , the lighting module 350 is installed on the housing 310 to illuminate the storage compartment 110 where the air circulation device 300 is located when the door body 200 of the direct-cooling refrigerator 001 is opened.

[0144] In some embodiments of the present application, the direct-cooling refrigerator 001 is configured to turn on the lighting module 350 when the door body 200 is opened, and turn off the lighting module 350 when the door body 200 is closed.

[0145] Exemplarily, the direct-cooling refrigerator 001 is provided with a door opening and closing sensor (not shown in the figure) for detecting the opening and closing of the door body 200. When the controller of the direct-cooling refrigerator 001 receives a signal from the door opening and closing sensor indicating that the door body 200 is opened, the controller controls the direct-cooling refrigerator 001 to electrify the lighting module 350 to turn on the lighting module 350. When the controller of the direct-cooling refrigerator 001 receives a signal from the door opening and closing sensor indicating that the door body 200 is closed, the controller controls the direct-cooling refrigerator 001 to de-energize the lighting module 350 to turn off the lighting module 350.

[0146] The door opening sensor can be any feasible sensor such as a magnetic contact sensor, a photoelectric sensor, a mechanical microswitch, an ultrasonic sensor, etc.

[0147] Further, in some embodiments of the present application, the lighting module 350 can be fixed to the housing 310 in any feasible manner such as screwing, clamping, gluing, magnetic attraction, etc.

[0148] In some embodiments of the present application, the lighting module 350 comprises at least one of an incandescent lamp, a halogen lamp, a fluorescent lamp, an ultraviolet lamp, a high-pressure sodium lamp, and an LED lamp.

[0149] As shown in Figures 4 to 7 , Figure 10 , Figure 11 , Figure 12 , Figure 14 and Figure 15 , in some embodiments of the present application, the housing 310 (particularly the main housing 310a) further defines a lighting cavity 3106 for arranging the lighting module 350, and the lighting cavity 3106 is in communication with the air inlet cavity 3105 so as to generate an air flow through the lighting cavity 3106 when the centrifugal fan 321 is in operation, thereby cooling the lighting module 350 in the lighting cavity 3106.

[0150] As can be seen from the drawings, the second connecting structure 312 is a through hole formed on the top wall of the lighting cavity 3106.

[0151] As shown in Figure 12 , Figure 13 and Figure 16 , in some embodiments of the present application, the main housing 310a further defines a flow convergence cavity 3107, which is located between the lighting cavity 3106 and the air inlet cavity 3105.

[0152] As shown in Figure 12 , the lighting cavity 3106, the flow convergence cavity 3107, the radial cavity portion 31502 of the air inlet cavity 3105, and the axial cavity portion 31051 of the air inlet cavity 3105 are sequentially distributed from front to back and are sequentially in fluid communication.

[0153] As shown in Figures 4 to 10 and Figure 12 , in some embodiments of the present application, the air circulation device 300 further comprises a light-transmitting cover 360 mounted to the housing 310 and used for shielding the lighting cavity 3106, and an air inlet structure 3601 (as shown in Figure 12As shown), the air is drawn from the air intake structure into the lighting cavity 3106 by the centrifugal fan 321 to cool the lighting module 350.

[0154] like Figure 12 As shown, the air intake structure 3601 can specifically be a gap formed between the housing 310 and the light-transmitting cover 360.

[0155] Furthermore, the light-transmitting cover 360 can be fixed to the housing 310 using any feasible connection method, such as screw connection, snap-fit, adhesive connection, magnetic connection, etc.

[0156] like Figure 4 , Figure 5 and Figure 10 As shown, in some embodiments of the present invention, the light-transmitting cover 360 includes an upper inclined plate 361 extending obliquely upward from its front end and a lower inclined plate 362 extending obliquely downward from its front end, with the upper inclined plate 361 and the lower inclined plate 362 connected together.

[0157] like Figure 10 As shown, in the assembled state, the light-transmitting cover 360 abuts against the top wall (main shell 310a) of the lighting cavity 3106 via its upper inclined plate 361, and provides installation space for the ambient light 370 and the light guide cover 380 to be installed onto the main shell 310a. The lower inclined plate 362 is adapted to the front end face of the main shell 310a.

[0158] In some embodiments of the present invention, the ambient light 370 may include LED lights, fiber optic lights, etc.

[0159] In some embodiments of the present invention, the ambient light 370 can be fixed together with the main housing 310a and / or the light-transmitting cover 360 using any feasible connection method, such as screw connection, snap-fit, adhesive connection, magnetic connection, etc. The light guide cover 380 can also be fixed together with the main housing 310a and / or the light-transmitting cover 360 using any feasible connection method, such as screw connection, snap-fit, adhesive connection, magnetic connection, etc.

[0160] like Figure 10 and Figure 12 As shown, in some embodiments of the present invention, a portion of the light guide 380 is located on the front side of the upper inclined plate 361, and a portion is located within the gap that serves as the air intake structure 3601. Furthermore, the area of ​​the air intake structure 3601 where the light guide 380 is disposed is not completely filled by the light guide 380, and gaps still remain.

[0161] like Figures 4 to 6As shown, in some embodiments of the present invention, the light guide cover 380 is generally a strip structure with left and right symmetry, and the light guide cover 380 includes a horizontal part 381, a vertical part 382 and a connecting part 383. The horizontal part 381 is disposed on the front of the extension part 302 and extends left and right, the vertical part 382 is disposed on the bottom surface of the extension part 302 and extends front and back, and the connecting part 383 is disposed on the front of the extension part 302 and connects the horizontal part 381 and the extension part 302 together.

[0162] Furthermore, the light guide 380 may also include an upturned portion 384 located behind the longitudinal portion 382, ​​so that the light guide 380 clamps the light transmittance 360 ​​in the front-back direction and the left-right direction respectively, thereby enhancing the stability of the structure of the light guide 380. Optionally, the light guide 380 and the light transmittance 360 ​​may be bonded together, thereby making the light guide 380 surround a portion of the light transmittance 360, making the ambient light transmitted from the light guide 380 more aesthetically pleasing.

[0163] In addition, in other embodiments of the present invention, those skilled in the art may omit the light guide cover 380 as needed and set the ambient light 370 as a light strip, such as an LED light strip.

[0164] Furthermore, in some embodiments of the present invention, the ambient light 370 is configured to be illuminated when the centrifugal fan 321 rotates. Also, the brightness and / or flashing frequency of the ambient light 370 can be proportional to the rotational speed and / or current of the centrifugal fan 321.

[0165] As an example, such as Figure 12 As shown, the air circulation device 300 also includes a speed sensor 390 for detecting the rotational speed of the centrifugal fan 321, so that the air circulation device 300 controls the brightness and / or flashing frequency of the ambient light 370 based on the value detected by the speed sensor 390.

[0166] The speed sensor 390 can be any feasible sensor, such as a magnetoelectric speed sensor, a photoelectric speed sensor, a Hall effect speed sensor, or an eddy current speed sensor.

[0167] As an example two, the controller of the air circulation device 300 detects the current of the centrifugal fan 321 in real time, so that the air circulation device 300 controls the brightness and / or flashing frequency of the ambient light 370 by the magnitude of the current.

[0168] Further, in some embodiments of the present application, the direct-cooling refrigerator 001 is configured to turn on the atmosphere lamp 370 when the door body 200 is opened and the centrifugal fan 321 is rotating, and turn off the atmosphere lamp 370 when the door body 200 is closed or the centrifugal fan 321 is stopped. Thus, when the user opens the door body 200, the user can determine whether the air circulation device 300 is working by observing whether the atmosphere lamp 370 is on or off, so that the air supply function of the air circulation device 300 is visualized.

[0169] For example, the direct-cooling refrigerator 001 is configured with a door opening and closing sensor (which can be the same as the door opening and closing sensor described above) for detecting the opening and closing of the door body 200. When the controller of the direct-cooling refrigerator 001 receives a signal from the door opening and closing sensor indicating that the door body 200 is opened, the controller controls the direct-cooling refrigerator 001 to power on the atmosphere lamp 370 to turn on the atmosphere lamp 370. When the controller of the direct-cooling refrigerator 001 receives a signal from the door opening and closing sensor indicating that the door body 200 is closed, the controller controls the direct-cooling refrigerator 001 to power off the atmosphere lamp 370 to turn off the atmosphere lamp 370.

[0170] Alternatively, those skilled in the art can also set a transparent area 201 (as shown in Figure 1 ) on the door body 200 as needed, and configure the direct-cooling refrigerator 001 to be turned on when the centrifugal fan 321 is rotating, so that the user can observe whether the atmosphere lamp 370 is on or off through the transparent area 201, and further determine whether the air circulation device 300 is working.

[0171] As shown in Figure 7 and Figure 12 , in some embodiments of the present application, the air circulation device 300 as a whole includes a main body part 301 and an extension part 302 located in front of the main body part 301 (the part located on the front side of the double-dot-dashed line). The fan cavity 3104 and the air inlet cavity 3105 are formed on the main body part 301, and the illumination cavity 3106 is formed on the extension part 302. The confluence cavity 3107 can be formed on the main body part 301, or on the extension part 302, or between the main body part 301 and the extension part 302.

[0172] As can be seen from Figure 7 , the bottom surface of the extension part 302 is located on the top side of the bottom surface of the main body part 301, so that the air circulation device 300 has a sense of segmentation in vision when viewed from the front side of the air circulation device 300, especially when the user opens the door body 200 of the direct-cooling refrigerator 001, making the air circulation device 300 more beautiful.

[0173] It should be noted that the main body part 301 and the extension part 302 are two opposite parts of the air circulation device 300, and can have a clear boundary (as shown in Figure 7 andFigure 12 The double-dot line in FIG. 3B indicates the boundary between the air circulation device 300 and the door body 200, but the air circulation device 300 and the door body 200 can also not have a clear boundary.

[0174] From FIG. 3B, it can be seen that the air circulation device 300 is arranged on the extension 302, and the air circulation device 300 and the door body 200 are arranged in a staggered manner in the vertical direction, thereby reducing the overall thickness of the air circulation device 300. Figure 7 Figure 12 From FIG. 3B, it can be seen that the air circulation device 300 is arranged on the extension 302, and the air circulation device 300 and the door body 200 are arranged in a staggered manner in the vertical direction, thereby reducing the overall thickness of the air circulation device 300.

[0175] The working principle of the air circulation device 300 in some embodiments of the present application will be briefly described below with reference to FIGS. 3A and 3B. Figure 1 Figure 2 Figure 7 Figure 10 The working principle of the air circulation device 300 in some embodiments of the present application will be briefly described below with reference to FIGS. 3A and 3B.

[0176] When the air circulation device 300 is working, the rotating centrifugal fan 321 drives air to enter the air inlet cavity 3105 from the three air inlets 3101. Subsequently, the air is blown from the air outlet 3102 to the windward side wall 111 of the storage compartment 110 via the fan cavity 3104, and flows downward along the windward side wall 111. The air flowing downward along the windward side wall 111 gradually spreads, and in particular, the air flowing to the bottom of the windward side wall 111 and losing kinetic energy spreads in the horizontal direction to the entire storage compartment 110. Then, the air in the storage compartment 110 again enters the air inlet cavity 3105 from the three air inlets 3101. Such a cycle makes the air in the storage compartment 110 circulate and flow, and the temperature in the storage compartment 110 is uniformly distributed along with the flowing air. At the same time, the temperature of the windward side wall 111 is relatively low, and frost formation on the windward side wall 111 is avoided.

[0177] In this process, the air flowing through the sterilization module 340 is sterilized and purified by the sterilization module 340.

[0178] In this process, part of the air also enters the fan cavity 3104 via the gap of the spacing structure 313, the lighting cavity 3106, the confluence cavity 3107, the radial cavity part 31502 of the air inlet cavity 3105, and the axial cavity part 31051 of the air inlet cavity 3105, to cool the lighting module 350 and prevent the temperature of the lighting module 350 from being too high when the lighting module 350 is working. In addition, part of the air can also enter the air inlet cavity 3105 via the opening 3103 on the top side of the air circulation device 300.

[0179] When the direct-cooling refrigerator 001 detects that the door body 200 is opened, the lighting module 350 of the air circulation device 300 is powered on, so that the lighting module 350 provides lighting for the storage compartment 110 in which the lighting module 350 is arranged.

[0180] ​​​​For the direct-cooling refrigerator 001 without the transparent area 201 of the door body 200, when the direct-cooling refrigerator 001 detects that the door body 200 is opened, the atmosphere lamp 370 of the air circulation device 300 is powered on, so that the user can intuitively know that the centrifugal fan 321 is rotating by observing the atmosphere light emitted by the atmosphere lamp 370.

[0181] For the direct-cooling refrigerator 001 with the transparent area 201 of the door body 200, the direct-cooling refrigerator 001 can always power on the atmosphere lamp 370.

[0182] The person skilled in the art can understand that this linkage form of the atmosphere lamp 370 and the centrifugal fan 321 also enables the user to determine whether the air circulation device 300 has a fault by whether the atmosphere lamp 370 is lit or not.

[0183] So far, the technical solutions of the present application have been described in combination with the foregoing embodiments, but the person skilled in the art can understand that the protection scope of the present application is not limited to these specific embodiments. The person skilled in the art can split and combine the technical solutions in the above-described embodiments, or make equivalent changes or replacements to the related technical features, without deviating from the technical principles of the present application. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

[0184] Finally, it needs to be pointed out that the refrigerator of the present application is a refrigerator in a broad sense, which not only includes the refrigerator in a narrow sense as usually said, but also includes fresh-keeping equipment with refrigeration and / or freezing functions, such as a refrigerated cabinet, a freezer, etc.

[0185] In the present application, the term "communication" means fluid communication to allow fluid (such as air, liquid) to flow between two things in communication with each other. And the "communication" can be fluid leakage-free flow between two things in communication with each other, or can be fluid slightly leakage flow between two things in communication with each other.

Claims

1. An air circulating device, characterized by, The air circulation device is suitable for a direct-cooling refrigerator and comprises: a housing defining an air inlet cavity and a fan cavity communicating with the air inlet cavity, the housing further being provided with an air inlet opening communicating with the air inlet cavity and an air outlet opening communicating with the fan cavity; a centrifugal fan arranged in the fan cavity for driving air to flow through the air inlet opening, the air inlet cavity, the fan cavity and the air outlet opening in sequence; a plurality of guide plates arranged at the air outlet opening for uniformly blowing air out of the air outlet opening.

2. The air circulation device according to claim 1, wherein an open side of the air inlet cavity away from the fan cavity is provided with a circumferential edge for abutting against a circumferential wall of a storage compartment of the direct-cooling refrigerator, so that negative pressure generated by the centrifugal fan when operating can attract the air circulation device to the circumferential wall of the storage compartment or form an air cushion between the air circulation device and the circumferential wall of the storage compartment.

3. The air circulation device according to claim 2, wherein the air inlet cavity comprises an axial cavity portion and a radial cavity portion, the axial cavity portion is located at a top side of the fan cavity in an axial direction of the centrifugal fan, and the radial cavity portion is located at a front side of the fan cavity in a radial direction of the centrifugal fan, at least one of a left side and a right side of the axial cavity portion and a bottom side of the radial cavity portion is provided with the air inlet opening.

4. The air circulation device according to claim 1, wherein the air inlet opening is provided as a plurality of rows of strip-shaped holes, and the strip-shaped holes in the same row are different in length.

5. The air circulation device according to claim 4, wherein a spacing structure between two adjacent strip-shaped holes in the same row is aligned with one strip-shaped hole in an adjacent row.

6. The air circulation device according to any one of claims 1 to 5, wherein the air outlet opening is arranged at a rear side of the housing; and / or the air outlet opening is configured to tilt the air blown therefrom downward.

7. The air circulation device according to any one of claims 1 to 5, wherein a plurality of the guide plates are sequentially and spacedly distributed in a transverse direction of the air outlet opening, and the spacing between two adjacent guide plates is referred to as a plate spacing; in the transverse direction of the air outlet opening, the plate spacing is smaller on a side closer to the air outlet opening where the air pressure is larger, and the plate spacing is larger on a side closer to the air outlet opening where the air pressure is smaller.

8. The air circulation device according to claim 7, wherein in a direction in which the air pressure at the air outlet opening decreases from large to small, the plate spacing first gradually increases and then becomes equal; and / or in the transverse direction of the air outlet opening, the guide plates on the side closer to the air outlet opening where the air pressure is larger are thicker, and the guide plates on the side closer to the air outlet opening where the air pressure is smaller are thinner; and / or portions on both sides of the plurality of guide plates in the transverse direction are inclined outward to increase the transverse width of the air flow blown out of the air outlet opening.

9. The air circulation device according to any one of claims 1 to 5, wherein the housing comprises a main housing and a bottom housing, The air inlet cavity and the air inlet are formed on the main casing, and the fan cavity and the air outlet are formed between the main casing and the bottom casing.

10. A direct-cooled refrigerator characterized by comprising: Comprise: A cabinet defining at least one storage compartment; The air circulation device of any one of claims 1 to 9 is arranged in the storage compartment for driving circulation flow of air in the storage compartment to prevent frost from occurring on the side wall of the storage compartment.

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