Air supply visual air circulation device and direct cooling refrigerator

Abstract

The invention belongs to the technical field of refrigeration equipment, and particularly provides an air supply visualized air circulation device and a direct cooling refrigerator. The air circulation device comprises a shell, a fan and an atmosphere lamp. The shell is provided with an air inlet and an air outlet. The fan is arranged in the shell and used for driving air to enter the shell from the air inlet and flow out of the shell from the air outlet. The atmosphere lamp is installed on the shell and is configured to be turned on when the draught fan rotates. 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; and a user can determine whether the fan is in operation or not by observing whether the atmosphere lamp is turned on or not, so that visualization of the air supply function of the air circulation device is achieved, and the use experience of the user is improved.

Description

Technical Field

[0001] This invention belongs to the field of refrigeration equipment technology, specifically providing a visualized air circulation device and a direct-cooling refrigerator. Background Technology

[0002] A direct-cooling refrigerator, also known as a natural convection refrigerator, is a type of refrigerator that uses natural convection to cool the items inside.

[0003] In direct-cooling refrigerators, the evaporator is usually located on the outside or inside of the side wall of the storage compartment. The evaporator's cooling capacity is transferred to the storage compartment through heat conduction, and then the items in the storage compartment are cooled by natural convection.

[0004] Because direct-cooling refrigerators use natural convection for cooling, the temperature distribution inside the storage compartment is uneven. Areas near the evaporator are colder and prone to frost buildup, while areas further away are warmer. When the frost layer is thick, it hinders cold air transfer, thus affecting the refrigerator's cooling performance, increasing energy consumption, and even damaging the refrigerator. Therefore, users need to regularly clean the frost layer from the storage compartment, resulting in a poor user experience. Summary of the Invention

[0005] One objective of this invention is to solve the problem of frost buildup in existing direct-cooling refrigerators.

[0006] To achieve the above objectives, the present invention provides, in a first aspect, a visualized air circulation device suitable for direct-cooling refrigerators, the air circulation device comprising:

[0007] The housing has an air inlet and an air outlet;

[0008] A fan is arranged inside the housing and is used to drive air into the housing from the air inlet and out of the housing from the air outlet;

[0009] An ambient light is mounted on the housing and configured to be illuminated when the fan is rotating.

[0010] Optionally, the brightness and / or flashing frequency of the ambient light are proportional to the rotational speed and / or current of the fan.

[0011] Optionally, the air circulation device includes a speed sensor for detecting the fan speed, so that the air circulation device controls the brightness and / or flashing frequency of the ambient light by means of the value detected by the speed sensor.

[0012] Optionally, the air circulation device includes a main body and an extension located on the front side of the main body, the bottom surface of the extension being located on the top side of the bottom surface of the main body; the ambient light is disposed on the extension.

[0013] Optionally, the air circulation device further includes a light guide for uniformly diffusing the light emitted by the ambient light. The light guide is generally a strip structure that is symmetrical from left to right. The light guide includes a horizontal part, a vertical part, and a connecting part. The horizontal part is disposed on the front of the extension and extends from left to right. The vertical part is disposed on the bottom surface of the extension and extends from front to back. The connecting part is disposed on the front of the extension and connects the horizontal part to the extension.

[0014] Optionally, the air circulation device further includes a lighting module; the housing defines an air inlet cavity, a fan cavity for arranging the fan, and a lighting cavity for arranging the lighting module, wherein the air inlet, the air inlet cavity, the fan cavity, and the air outlet are in sequential fluid communication, and the lighting cavity is in communication with the air inlet cavity; the air circulation device further includes a light-transmitting cover mounted on the housing and used to shield the lighting cavity, wherein a gap is formed between the light-transmitting cover and the housing; the ambient light is mounted in the gap and is gap-fitted with at least one of the light-transmitting cover and the housing, so that air enters the lighting cavity from the gap under the action of the fan to cool the lighting module.

[0015] Optionally, the top side of the air inlet cavity is provided with an opening, and the circumferential edge of the opening is used to abut against the peripheral wall of the storage compartment of the direct-cooling refrigerator, so that the negative pressure generated when the fan is working will suck the air circulation device to the peripheral wall of the storage compartment or form an air cushion between the air circulation device and the peripheral wall of the storage compartment.

[0016] Optionally, the air outlet is located on the rear side of the housing; and / or, the air outlet is configured to allow air blown out from it to tilt downwards; and / or, the air circulation device further includes a plurality of guide plates arranged sequentially in the air outlet in a transverse direction; the interval between two adjacent guide plates is referred to as the plate interval, and in the transverse direction of the air outlet, the plate interval is smaller on the side with higher air pressure near the air outlet, and larger on the side with lower air pressure near the air outlet.

[0017] In a second aspect, the present invention provides a direct-cooling refrigerator, comprising:

[0018] The container is limited to having at least one storage room;

[0019] The door serves to conceal the storage room;

[0020] The air circulation device described in any one of the first aspects is provided in the storage room for driving air circulation within the storage room to prevent frost from forming on the side walls of the storage room.

[0021] Optionally, the direct-cooling refrigerator is configured to illuminate the ambient light when the door is opened and the fan is rotating, and to extinguish the ambient light when the door is closed or the fan stops rotating; or, the door has a transparent area, and the direct-cooling refrigerator is configured to illuminate the ambient light when the fan is rotating.

[0022] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this invention, by providing an air circulation device suitable for a direct-cooling refrigerator, the air inside the direct-cooling refrigerator (specifically the storage compartment) can circulate under the action of the air circulation device; thereby, the temperature inside the direct-cooling refrigerator is evenly distributed due to the air circulation, avoiding the phenomenon of frost formation in the area near the evaporator due to excessively low temperature. By installing an ambient light on the casing and setting the ambient light to be illuminated when the fan is running, users can determine whether the fan is running by observing whether the ambient light is on or off, thus realizing the visualization of the air circulation device's air delivery function and improving the user experience.

[0023] Furthermore, by making the brightness and / or flashing frequency of the ambient light proportional to the speed and / or current of the fan, users can determine the fan speed by observing the brightness and / or flashing frequency of the ambient light, thereby understanding the air delivery capacity of the air circulation device.

[0024] 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

[0025] 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.

[0026] In the attached image:

[0027] Figure 1 This is a three-dimensional schematic diagram of a direct-cooling refrigerator provided by the present invention;

[0028] Figure 2 yes Figure 1 A partial sectional view of a direct-cooling refrigerator along the AA direction;

[0029] Figure 3 yes Figure 1 A partial 3D rendering of the ceiling wall of the storage compartment in a direct-cooling refrigerator;

[0030] Figure 4 This is a first exploded view of the air circulation device in some embodiments of the present invention;

[0031] Figure 5 This is a second exploded view of the air circulation device in some embodiments of the present invention;

[0032] Figure 6 This is a third exploded view of the air circulation device in some embodiments of the present invention;

[0033] Figure 7 yes Figures 4 to 6 First isometric view of the air circulation device;

[0034] Figure 8 yes Figures 4 to 6 Second isometric view of the air circulation device;

[0035] Figure 9 yes Figures 4 to 6 Third axonometric view of the air circulation device;

[0036] Figure 10 yes Figure 7 Cross-sectional view of the air circulation device along the BB direction;

[0037] Figure 11 yes Figure 7 A cross-sectional view of the housing of the air circulation device along the BB direction;

[0038] Figure 12 yes Figure 7 A cross-sectional view of the air circulation device along the CC direction;

[0039] Figure 13 yes Figures 4 to 12 First axonometric view of the central main shell;

[0040] Figure 14 yes Figures 4 to 12 Second axonometric view of the main shell;

[0041] Figure 15 yes Figure 14 Cross-sectional view of the main shell along the DD direction;

[0042] Figure 16 yes Figures 4 to 12 Third axonometric view of the main shell;

[0043] Figure 17 yes Figures 4 to 6 Axonometric view of the sterilization module;

[0044] Figure 18 This is an isometric view of the sterilization module in some other embodiments of the present invention.

[0045] Explanation of reference numerals in the attached diagram: 001, direct-cooling refrigerator;

[0046] 100. Box body; 110. Storage compartment; 111. Windward side wall; 112. Settlement trough; 113. First quick-release structure; 1131. End cap; 114. First connecting structure;

[0047] 200. Door body; 201. Transparent area;

[0048] 300. Air circulation device; 301. Main body; 302. Extension;

[0049] 310. Housing; 310a. Main housing; 310b. Bottom housing; 3101. Air inlet; 31011. Strip-shaped hole; 3102. Air outlet; 3103. Opening; 3104. Fan cavity; 3105. Air inlet cavity; 31051. Axial cavity; 31502. Radial cavity; 3106. Lighting cavity; 3107. Combination cavity; 311. Second quick-release structure; 312. Second connecting structure; 313. Spacing structure;

[0050] 321. Fan; 322. Mounting bracket;

[0051] 330. Drainage plate; 331. Plate spacer;

[0052] 340. Sterilization module; 341. Ventilation hole; 342. Positive electrode component; 343. Negative electrode component; 344. Outer frame;

[0053] 350. Lighting module;

[0054] 360. Light-transmitting cover; 3601. Air intake structure; 361. Upper inclined plate; 362. Lower inclined plate;

[0055] 370. Ambient lighting;

[0056] 380. Light guide cover; 381. Horizontal section; 382. Vertical section; 383. Connecting section; 384. Upward-curving section;

[0057] 390. Speed ​​sensor;

[0058] 400. Evaporator. Detailed Implementation

[0059] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0060] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. For example, unless otherwise specified, the terms "installation," "connection," "joining," and "fixing" can specifically refer to any feasible connection form such as bolted connections, screw connections, welding, insertion, riveting, fusion welding, and snap-fitting.

[0062] Furthermore, it should be noted that in the description of this invention, the terms "coldness" and "heat" are two descriptions of the same physical state. That is, the higher the "coldness" of a target object (e.g., evaporator, air, condenser, etc.), the lower its "heat," and vice versa. A target object absorbs "coldness" while releasing "heat," and releases "coldness" while absorbing "heat." A target object retains "coldness" or "heat" to maintain its current temperature. "Refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon; that is, a target object (e.g., an evaporator) absorbs heat while refrigerating.

[0063] Since the air circulation device with visualized air supply of the present invention is applicable to direct-cooling refrigerators, the air circulation device of the present invention will be described in detail below with reference to the accompanying drawings and in conjunction with direct-cooling refrigerators, so as to facilitate those skilled in the art to understand the air circulation device provided by the present invention.

[0064] like Figure 1 As shown, in this invention, the direct-cooling refrigerator 001 includes a cabinet 100, a door 200, an air circulation device 300, and an evaporator 400 for refrigeration.

[0065] The enclosure 100 includes at least one storage compartment 110. The at least one storage compartment 110 includes at least one of a refrigerator compartment, a freezer compartment, and a variable temperature compartment.

[0066] The door 200 is rotatably mounted onto the housing 100 and serves to conceal the storage compartment 110. Those skilled in the art can, as needed, make one door 200 correspond to one storage compartment 110, or one door 200 correspond to two or more storage compartments 110.

[0067] The air circulation device 300 is installed on the inner top of the storage room 110. Those skilled in the art can, as needed, configure at least one air circulation device 300 for each storage room 110, or configure at least one air circulation device 300 for at least one of all storage rooms 110.

[0068] The evaporator 400 is installed on the housing 100 to provide cooling capacity to the storage compartment 110.

[0069] like Figure 2 As shown, in this invention, the top wall of the storage compartment 110 is provided with a recessed groove 112, and the air circulation device 300 is installed in the recessed groove 112 to hide a part of the air circulation device 300, thereby optimizing the aesthetics of the direct cooling refrigerator 001 and preventing users from bumping into the air circulation device 300 when taking out or putting in items.

[0070] Furthermore, the settling tank 112 extends rearward to the rear side wall of the storage room 110 so that the installation position of the air circulation device 300 is as far back as possible.

[0071] Optionally, the settling tank 112 is located in the middle of the storage chamber 110 in the lateral direction, so that the air circulation device 300 can also be located in the middle of the storage chamber 110 in the lateral direction, thereby enabling the air it drives to flow evenly in the storage chamber 110.

[0072] Optionally, the depth of the front part of the settling tank 112 gradually decreases from back to front, and the height of the front part of the air circulation device 300 gradually decreases from back to front, so as to reasonably arrange the components inside the air circulation device 300.

[0073] Of course, those skilled in the art can omit the aforementioned sink 112 as needed. However, this would make the air circulation device 300 more prominent, affecting the aesthetics of the direct-cooling refrigerator 001 and even its storage capacity.

[0074] like Figure 2 As shown, in this invention, the air circulation device 300 includes a housing 310 and a fan 321.

[0075] Continue reading 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 designated as the windward side wall 111 (e.g., Figure 1 and Figure 2 The rear wall of the storage room 110 shown has an air outlet 3102 that slopes downward toward the windward side wall 111.

[0076] In this invention, the windward sidewall 111 corresponds to at least a portion of the evaporator 400. In other words, the evaporator 400 is arranged at the windward sidewall 111, and at least a portion of the evaporator 400 is mounted to the outside or inside of the windward sidewall 111, so that the windward sidewall 111 can receive the cooling energy of the evaporator 400 and has a lower temperature.

[0077] from Figure 2 As can be seen from the present invention, the air circulation device 300 is arranged at the rear of the inner top of the storage room 110 so that the housing 310 and the windward side wall 111 are as close as possible, thereby reducing the gap between the air outlet 3102 (located at the rear of the housing 310) and the windward side wall 111.

[0078] Continue reading Figure 2 The fan 321 is arranged inside 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 to blow out the air outlet 3102 at an angle downward and towards the windward side wall 111, so that the airflow flows downward along the windward side wall 111, thereby preventing the windward side wall 111 from frosting.

[0079] In this invention, the fan 321 is a centrifugal fan. Of course, those skilled in the art can also configure the fan 321 as any feasible fan such as an axial flow fan, a mixed flow fan, or a cross flow fan, and make adaptive adjustments to the structure of other components of the air circulation device 300.

[0080] Continue reading Figure 2Let α be the angle between the tangent of the bottom wall of the air outlet 3102 and the windward side wall 111. Then 10°≤α≤75°. Let β be the angle between the tangent of the bottom wall of the air outlet 3102 and the tangent of the top wall. Then 5°≤β≤175°.

[0081] In this invention, α and β are used to enable the airflow blown from the air outlet 3102 to flow along the surface of the windward sidewall 111 in the vertical direction over a larger area of ​​the windward sidewall 111.

[0082] Furthermore, 15°≤α≤45°, and / or 15°≤β≤165°.

[0083] For example, α can be any feasible value such as 10°, 15°, 20°, 30°, 45°, 60°, 75°, etc. β can be any feasible value such as 5°, 10°, 15°, 20°, 30°, 45°, 60°, 75°, 110°, 156°, 165°, 175°, etc.

[0084] Furthermore, α and β satisfy the following functional relationship:

[0085] α=(β+w÷w1-b)÷h×h1

[0086] Where w is the width of the air circulation device 300 (e.g., ... Figure 1 As shown), h is the height of the air circulation device 300 (as shown). Figure 2 (As shown).

[0087] Where w1 is any value selected from 200mm to 500mm, such as 200mm, 222mm, 250mm, 350mm, 398mm, 456mm, 480mm, 500mm, etc.

[0088] Where h1 is any value selected from 40mm to 60mm, such as 40mm, 42mm, 550mm, 60mm, etc.

[0089] Where b is any value selected from 10° to 15°, such as 10°, 11°, 13°, 14.5°, 15°, etc.

[0090] In this invention, α and β, which satisfy the above functional relationship, enable the airflow delivered from the air outlet 3102 to cover as much as possible the area of ​​the windward sidewall 111 corresponding to the evaporator 400. That is, the area of ​​the windward sidewall 111 corresponding to the evaporator 400 can be blown away by the airflow delivered from the air outlet 3102, so that the coldness in this area is carried away by the airflow and frost is prevented.

[0091] like Figure 2 and Figure 3As shown, in this invention, the top of the storage compartment 110 equipped 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. Specifically, the air circulation device 300 can be first connected to or pre-fixed to the housing 100 via the first quick-release structure 113, and then the air circulation device 300 can be completely fixed to the housing 100 via the first connecting structure 114.

[0092] from Figure 2 and Figure 3 As can be seen, the first quick-release structure 113 and the first connecting structure 114 are set on the top wall of the settling tank 112 to ensure that the air circulation device 300 can be installed in the settling tank 112.

[0093] like Figure 3 As shown, 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. Furthermore, the number of each of the first quick-release structure 113 and the first connecting structure 114 is not limited to... Figure 3 The two shown can also be one, three, four, five, or any other feasible number.

[0094] In addition, those skilled in the art can also configure the first quick-release structure 113 as any other feasible structure as needed, such as a slot, a buckle, a magnet, a slide rail, etc.

[0095] Accordingly, those skilled in the art can also configure the first connection structure 114 as any other feasible structure as needed, such as a threaded post, a snap-fit, a magnet, etc.

[0096] Provided that the air circulation device 300 can be fixed to the housing 100, those skilled in the art may omit at least one of the first quick-release structure 113 and the first connecting structure 114 as needed. For example, both the first quick-release structure 113 and the first connecting structure 114 can be omitted, and the air circulation device 300 can be glued to the housing 100 using other adhesive materials such as glue or double-sided tape.

[0097] The following reference Figures 4 to 18 The air circulation device 300 of the present invention will be further illustrated by example.

[0098] like Figures 4 to 7 , Figures 9 to 11 , Figures 13 to 16 As shown, in some embodiments of the present invention, the housing 310 is provided with a second quick-release structure 311 that matches the first quick-release structure 113, so that the air circulation device 300 is installed on the housing 100 through the second quick-release structure 311.

[0099] Furthermore, the second quick-release structure 311 is configured as a U-shaped structure so that the first quick-release structure 113 and the second quick-release structure 311 are plugged together.

[0100] Specifically, the cylindrical structure of the first quick-release structure 113 is embedded in the U-shaped structure and the end cap 1131 stops the U-shaped structure in the vertical direction, thereby realizing the insertion of the first quick-release structure 113 and the second quick-release structure 311.

[0101] Furthermore, in other embodiments of the present invention, those skilled in the art can, as needed, configure the second quick-release structure 311 as follows: Figure 3 The first quick-release structure 113 shown is a cylindrical structure with end caps 1131. The first quick-release structure 113 is configured as follows: Figure 4 The second quick-release structure 311 shown is a U-shaped structure.

[0102] like Figures 4 to 7 As shown, in some embodiments of the present invention, a second quick-release structure 311 is disposed at the rear top of the air circulation device 300 to adapt to a first quick-release structure 113 disposed on the rear side of the top wall of the storage compartment 110.

[0103] Of course, those skilled in the art can also adjust the positions of the second quick-release structure 311 and the first quick-release structure 113 as needed, for example, by setting the second quick-release structure 311 at the front or middle position of the top of the air circulation device 300.

[0104] like Figures 4 to 7 , Figures 9 to 11 , Figure 13 and Figure 16 As shown, in some embodiments of the present invention, the housing 310 is provided with a second connection structure 312 that matches the first connection structure 114, so that the air circulation device 300 is fixed to the box 100 through the first connection structure 114 and the second connection structure 312.

[0105] In some embodiments of the present invention, the air circulation device 300 is first pre-installed on the housing 100 via the first quick-release structure 113 and the second quick-release structure 311, and then fixed to the housing 100 via the first connecting structure 114 and the second connecting structure 312. This not only facilitates the installation and disassembly of the air circulation device 300, but also achieves the fixation between the air circulation device 300 and the housing 100.

[0106] Furthermore, the second connecting structure 312 is a through hole, which is aligned with the first connecting structure 114, which is configured as a threaded hole, so that a bolt or screw can pass through the through hole and be tightened into the threaded hole to fix the air circulation device 300 to the housing 100.

[0107] Furthermore, in other embodiments of the present invention, those skilled in the art may omit the second connecting structure 312 as needed, and allow the air circulation device 300 to be installed onto the housing 100 solely through the first quick-release structure 113 and the second quick-release structure 311. For example, at least one second quick-release structure 311 may be provided on the front and rear sides of the housing 310, or other types of quick-release structures may be provided on the front side of the housing 310, to securely install the air circulation device 300 onto the housing 100.

[0108] like Figure 4 , Figure 7 , Figure 11 , Figures 13 to 16 As shown, in some embodiments of the present invention, the top side of the housing 310 is provided with an opening 3103 that communicates with the air inlet side of the fan 321. The circumferential edge of the opening 3103 abuts against or is close to the top wall of the storage chamber 110, so that the negative pressure generated when the fan 321 is working will draw the air circulation device 300 to the top wall of the storage chamber 110 or form an air cushion between the air circulation device 300 and the top wall of the storage chamber 110.

[0109] The circumferential edge of the opening 3103 abuts against the top wall of the storage room 110. This can be a part or all of the circumferential edge of the opening 3103 abutting against the top wall of the storage room 110.

[0110] The circumferential edge of the opening 3103 is adjacent to the top wall of the storage room 110. Specifically, the distance between the circumferential edge and the top wall is less than a set value, which is no more than 10 mm, preferably no more than 5 mm, further preferably no more than 3 mm, and even more preferably no more than 1 mm.

[0111] Those skilled in the art will understand that the aforementioned arrangement of the opening 3103, especially when a portion of the circumferential edge of the opening 3103 abuts against the top wall of the storage compartment 110, or when the circumferential edge of the opening 3103 is positioned close to the top wall of the storage compartment 110, allows the air circulation device 300 to be drawn against the top wall of the storage compartment 110 by the negative pressure generated when the fan 321 is operating. This counteracts part of the weight of the air circulation device 300, not only enhancing the reliability of the connection between the air circulation device 300 and the housing 100, but also increasing the air intake area of ​​the air circulation device 300. Simultaneously, the air cushion formed between the air circulation device 300 and the top wall of the storage compartment 110 also serves to reduce vibration, thereby reducing the noise during operation of the air circulation device 300.

[0112] like Figures 4 to 7 , Figures 10 to 16As shown, in some embodiments of the present invention, the housing 310 may further define a fan cavity 3104 and an air inlet cavity 3105 located on the top side of the fan cavity 3104, with an opening 3103 formed on the top side of the air inlet cavity 3105. Furthermore, the air inlet 3101 of the air circulation device 300 is formed on the peripheral wall of the air inlet cavity 3105, and the air outlet 3102 of the air circulation device 300 is formed in the area where the housing 310 communicates with the fan cavity 3104.

[0113] like Figure 4 , Figures 10 to 13 and Figure 16 As shown, in some embodiments of the present invention, the air inlet cavity 3105 may 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 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 fan 321.

[0114] Air inlets 3101 are provided on the left and right sides of the axial cavity 31051 and the bottom side of the radial cavity 31502, respectively.

[0115] In other embodiments of the present invention, those skilled in the art may, as needed, provide an air inlet 3101 on only one or two of the left and right sides of the axial cavity 31051 and the bottom side of the radial cavity 31502.

[0116] like Figures 4 to 11 , Figures 13 to 16 As shown, in some embodiments of the present invention, the air inlet 3101 is configured as multiple rows of strip holes 31011, and the lengths of the strip holes 31011 in the same row are different. Optionally, the spacing structure 313 between two adjacent strip holes 31011 in the same row is aligned with one strip hole 31011 in an adjacent row.

[0117] Those skilled in the art will understand that the above-described arrangement of the air inlet 3101 can optimize the appearance of the air circulation device 300, making the air circulation device 300 look more aesthetically pleasing overall.

[0118] like Figures 4 to 11 As shown, in some embodiments of the present invention, the housing 310 may include a main housing 310a and a bottom housing 310b. An air inlet chamber 3105 and an air inlet 3101 are formed on the main housing 310a, and a fan chamber 3104 and an air outlet 3102 are formed between the main housing 310a and the bottom housing 310b. The main housing 310a and the bottom housing 310b can be fixedly connected together in any feasible manner, such as welding, screw connection, bonding, plugging, snap-fit, etc.

[0119] Those skilled in the art will understand that the above-described form of the housing 310 not only facilitates the production and manufacturing of the housing 310, but also facilitates the installation of the fan 321.

[0120] like Figures 4 to 10 As shown, in some embodiments of the present invention, the air circulation device 300 further includes a fixed bracket 322, a diversion plate 330, a sterilization module 340, a lighting module 350, a light-transmitting cover 360, an ambient light 370, and a light guide cover 380.

[0121] The fixed bracket 322 is used to fix the fan 321 to the housing 310, the air guide plate 330 is used to blow air out evenly from the air outlet 3102, the sterilization module 340 is used to sterilize the air flowing through the air circulation device 300, the lighting module 350 is used to provide lighting for the storage room 110 where the air circulation device 300 is located, the light-transmitting cover 360 is used to shield and hide the lighting module 350, the ambient light 370 is used to provide ambient light for the storage room 110 where the air circulation device 300 is located, and the light guide cover 380 is used to diffuse the light emitted by the ambient light 370 evenly.

[0122] Furthermore, in other embodiments of the present invention, those skilled in the art may omit at least one of the following components: the drainage plate 330, the sterilization module 340, the lighting module 350, the light-transmitting cover 360, the ambient light 370, and the light guide cover 380, depending on actual needs.

[0123] The following descriptions, in conjunction with the accompanying drawings, will detail the fixed bracket 322, the diversion plate 330, the sterilization module 340, the lighting module 350, the light-transmitting cover 360, the ambient light 370, and the light guide cover 380.

[0124] like Figures 4 to 6 and Figure 10 As shown, in some embodiments of the present invention, the fixing bracket 322 is fixedly connected to the housing 310 and the fan 321 respectively (e.g., bolt connection, screw connection, snap-fit, riveting, etc.) to fix the fan 321 to the housing 310. Further, the fixing bracket 322 is fixedly connected to at least one of the main housing 310a and the bottom housing 310b. Alternatively, those skilled in the art can, as needed, integrally manufacture the fixing bracket 322 with one of the main housing 310a and the bottom housing 310b. Alternatively, the fixing bracket 322 can be integrally manufactured with the non-rotating portion of the fan 321.

[0125] like Figure 5 , Figure 6 , Figures 9 to 12 , Figure 14 and Figure 15 As shown, multiple air outlet plates 330 are arranged at the air outlet 3102, and the multiple air outlet plates 330 are distributed sequentially at intervals in the horizontal direction of the air outlet 3102.

[0126] Furthermore, the plurality of drainage plates 330 can be fixedly connected to or integrally formed with the housing 310, especially the main housing 310a. The fixed connection includes bonding, insertion, welding, etc.

[0127] like Figure 12 As shown, if the interval between two adjacent diversion plates 330 is denoted as plate interval 331, then in the horizontal direction of the air outlet 3102, the plate interval 331 on the side with greater air pressure near the air outlet 3102 is smaller, and the plate interval 331 on the side with less air pressure near the air outlet 3102 is larger.

[0128] Those skilled in the art will understand that by arranging multiple guide plates 330 at the air outlet 3102, the airflow blown from the air outlet 3102 can be divided into multiple streams in the horizontal direction. By making the plate spacing 331 smaller on the side with higher air pressure near the air outlet 3102 and larger on the side with lower air pressure near the air outlet 3102, the flow rate and velocity of each airflow are made as similar as possible, thereby making the airflow blown from the air outlet 3102 more uniform.

[0129] Continue reading Figure 12 Along the direction of decreasing air pressure at the air outlet 3102, the plate spacing 331 gradually increases and then becomes equal. Furthermore, the proportion of equal plate spacing 331 among all plate spacings 331 is selected from any value between 0.4 and 0.6 (e.g., 0.4, 0.45, 0.5, 0.58, 0.6, etc.) to make the airflow velocity from each plate spacing 331 as equal as possible.

[0130] Furthermore, any plate spacing 331 is selected from any value from 2mm to 20mm (e.g., 2mm, 3mm, 5mm, 6mm, 8mm, 9mm, 10mm, 12mm, 15mm, 18mm, 20mm, etc.), especially from any value from 5mm to 10mm, so as to ensure that the airflow velocity blown from each plate spacing 331 is as equal as possible, while avoiding the plate spacing 331 being too small, which would cause greater obstruction to the airflow.

[0131] Continue reading Figure 12 In the horizontal direction of the air outlet 3102, the thickness of the deflector plate 330 on the side with greater air pressure near the air outlet 3102 is larger, and the thickness of the deflector plate 330 on the side with less air pressure near the air outlet 3102 is smaller.

[0132] Those skilled in the art will understand that, in the transverse direction of the air outlet 3102, by making the thickness of the deflector plate 330 on the side with higher air pressure near the air outlet 3102 greater, vibration of the deflector plate 330 when impacted by faster airflow is avoided. By making the thickness of the deflector plate 330 on the side with lower air pressure near the air outlet 3102 less, the obstruction of the deflector plate 330 to the airflow is reduced.

[0133] Furthermore, the thickness of any of the drainage plates 330 is selected from any value from 0.5mm to 3mm, such as 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 2mm, 2.5mm, 3mm, etc.

[0134] like Figures 4 to 7 and Figure 10 As shown, in some embodiments of the present invention, 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.

[0135] like Figure 7 and Figure 10 As shown, in some embodiments of the present invention, 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.

[0136] Furthermore, those skilled in the art can, as needed, assign at least one sterilization module 340 to each air inlet 3101, or assign at least one sterilization module 340 to one or more of all air inlets 3101.

[0137] Furthermore, in some embodiments of the present invention, the sterilization module 340 is a structure made of a material with sterilization function. This material with sterilization function includes copper ions or silver ions.

[0138] like Figure 17 As shown, in some embodiments of the present invention, the sterilization module 340 is provided with a plurality of ventilation holes 341 that allow air to flow through, so as to increase the contact area between the sterilization module 340 and the air.

[0139] Furthermore, in other embodiments of the present invention, those skilled in the art can also configure the sterilization module 340 as any other feasible structure or device as needed, such as a negative ion sterilization device, an ultraviolet sterilization device, an electrostatic sterilization device, or an ozone sterilization device.

[0140] For example, in Figure 18In other embodiments shown, the sterilization module 340 includes a positive electrode component 342 and a negative electrode component 343, so that the sterilization module 340 sterilizes and deodorizes the air by electrostatic adsorption when the positive electrode component 342 and the negative electrode component 343 are energized. Specifically, when a high voltage is applied to the positive electrode component 342 and the negative electrode component 343, particles or molecules in the air are adsorbed onto the positive electrode component 342 or the negative electrode component 343 under the action of the electric field and destroyed by the high voltage charge, thereby achieving the purpose of sterilization and deodorization.

[0141] Continue reading Figure 18 The positive electrode component 342 and the negative electrode component 343 have an interlocking comb-like structure, and the sterilization module 340 also includes an outer frame 344 disposed outside the positive electrode component 342 and the negative electrode component 343. The outer frame 344 is used to fix the positive electrode component 342 and the negative electrode component 343, so that the positive electrode component 342 and the negative electrode component 343 are spaced apart from each other. Furthermore, the outer frame 344 is made of insulating material.

[0142] like Figures 4 to 7 and Figure 10 As shown, the lighting module 350 is mounted on the housing 310 to illuminate the storage compartment 110 where the air circulation device 300 is located when the door 200 of the direct-cooling refrigerator 001 is opened.

[0143] In some embodiments of the present invention, the direct-cooling refrigerator 001 is configured to illuminate the lighting module 350 when the door 200 is opened and to extinguish the lighting module 350 when the door 200 is closed.

[0144] For example, the direct-cooling refrigerator 001 is equipped with a door opening / closing sensor (not shown) for detecting the opening and closing of the door 200. When the controller of the direct-cooling refrigerator 001 receives a signal from the door opening / closing sensor indicating that the door 200 is open, the controller controls the direct-cooling refrigerator 001 to power on the lighting module 350 to illuminate the lighting module 350. When the controller of the direct-cooling refrigerator 001 receives a signal from the door opening / closing sensor indicating that the door 200 is closed, the controller controls the direct-cooling refrigerator 001 to de-power the lighting module 350 to extinguish the lighting module 350.

[0145] The door opening / closing sensor can be any feasible sensor, such as a magnetic contact sensor, a photoelectric sensor, a mechanical micro switch, or an ultrasonic sensor.

[0146] Furthermore, in some embodiments of the present invention, the lighting module 350 can be fixed to the housing 310 by any feasible connection method, such as screw connection, snap-fit, adhesive connection, magnetic connection, etc.

[0147] In some embodiments of the present invention, the lighting module 350 includes at least one of incandescent lamp, halogen lamp, fluorescent lamp, ultraviolet lamp, high-pressure sodium lamp, and LED lamp.

[0148] like Figures 4 to 7 , Figure 10 , Figure 11 , Figure 12 , Figure 14 and Figure 15 As shown, in some embodiments of the present invention, the housing 310 (specifically the main housing 310a) further defines an illumination cavity 3106 for arranging the illumination module 350, and the illumination cavity 3106 communicates with the air inlet cavity 3105 so that when the fan 321 is working, an airflow is generated through the illumination cavity 3106 to cool the illumination module 350 inside the illumination cavity 3106.

[0149] As can be seen from the figure, the second connecting structure 312 is a through hole formed on the top wall of the lighting cavity 3106.

[0150] like Figure 12 , Figure 13 and Figure 16 As shown, in some embodiments of the present invention, the main housing 310a further defines a manifold 3107, which is located between the lighting cavity 3106 and the air inlet cavity 3105.

[0151] like Figure 12 As shown, the radial cavity 31502 of the lighting cavity 3106, the confluence cavity 3107, the air inlet cavity 3105, and the axial cavity 31051 of the air inlet cavity 3105 are distributed from front to back and are in sequential fluid communication.

[0152] like Figures 4 to 10 and Figure 12 As shown, in some embodiments of the present invention, the air circulation device 300 further includes a light-transmitting cover 360 mounted on the housing 310 and used to shield the lighting cavity 3106. An air intake structure 3601 communicating with the lighting cavity 3106 is provided between at least one or both of the light-transmitting cover 360 and the housing 310. Figure 12 As shown), air is drawn from the air intake structure into the lighting cavity 3106 by the fan 321 to cool the lighting module 350.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] In some embodiments of the present invention, the ambient light 370 may include LED lights, fiber optic lights, etc.

[0158] 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.

[0159] 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.

[0160] like Figures 4 to 6 As 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.

[0161] 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.

[0162] 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.

[0163] Furthermore, in some embodiments of the present invention, the ambient light 370 is configured to be illuminated when the 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 fan 321.

[0164] 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 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.

[0165] 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.

[0166] As an example two, the controller of the air circulation device 300 detects the current of the 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.

[0167] Furthermore, in some embodiments of the present invention, the direct-cooling refrigerator 001 is configured to illuminate the ambient light 370 when the door 200 is opened and the fan 321 rotates, and to extinguish the ambient light 370 when the door 200 is closed or the fan 321 stops rotating. Thus, by observing whether the ambient light 370 is illuminated when the user opens the door 200, it can be determined whether the air circulation device 300 is working, making the air circulation function of the air circulation device 300 visible.

[0168] For example, the direct-cooling refrigerator 001 is equipped with a door opening / closing sensor (which may be the same as the door opening / closing sensor described above) for detecting the opening and closing of the door 200. When the controller of the direct-cooling refrigerator 001 receives a signal from the door opening / closing sensor indicating that the door 200 is open, the controller causes the direct-cooling refrigerator 001 to power on the ambient light 370 to illuminate the ambient light 370. When the controller of the direct-cooling refrigerator 001 receives a signal from the door opening / closing sensor indicating that the door 200 is closed, the controller causes the direct-cooling refrigerator 001 to de-power the ambient light 370 to extinguish the ambient light 370.

[0169] Alternatively, those skilled in the art may, as needed, provide a transparent area 201 on the door 200 (e.g., Figure 1 As shown), the direct-cooling refrigerator 001 is configured to be illuminated when the fan 321 rotates, so that the user can observe whether the ambient light 370 is lit through the transparent area 201, thereby determining whether the air circulation device 300 is working.

[0170] like Figure 7 and Figure 12 As shown, in some embodiments of the present invention, the air circulation device 300 generally includes a main body 301 and an extension 302 (located in front of the double-dotted line) located in front of the main body 301 (the portion located behind the double-dotted line). A fan chamber 3104 and an air inlet chamber 3105 are formed on the main body 301, and an illumination chamber 3106 is formed on the extension 302. A confluence chamber 3107 may be formed on the main body 301, on the extension 302, or between the main body 301 and the extension 302.

[0171] from Figure 7 As can be seen, the bottom surface of the extension 302 is located on the top side of the bottom surface of the main body 301, so that when viewed from the front of the air circulation device 300, especially when the user opens the door 200 of the direct-cooling refrigerator 001, the air circulation device 300 has a visually segmented feel and is more aesthetically pleasing.

[0172] It should be noted that the main body 301 and the extension 302 are two opposing parts of the air circulation device 300, and may have a clear dividing line (e.g., Figure 7 and Figure 12 The double-dotted line in the text can also be without a clear dividing line.

[0173] from Figure 7 and Figure 12 As can be seen, the lighting module 350, the light-transmitting cover 360, the ambient light 370 and the light guide cover 380 are all set in the extension 302, thereby avoiding the distribution of these four components and the fan 321 in the vertical direction and reducing the overall thickness of the air circulation device 300.

[0174] The following reference Figure 1 , Figure 2 , Figure 7 and Figure 10 The working principle of the air circulation device 300 in some embodiments of the present invention will be briefly explained below.

[0175] When the air circulation device 300 is operating, the rotating fan 321 drives air into the air intake chamber 3105 through three air inlets 3101. Subsequently, the air passes through the fan chamber 3104 and is blown from the air outlet 3102 towards the windward side wall 111 of the storage room 110, where it flows downwards along the windward side wall 111. This downward-flowing air gradually diffuses, especially the air that reaches the bottom of the windward side wall 111 and loses kinetic energy, which then diffuses horizontally throughout the entire storage room 110. Then, the air in the storage room 110 re-enters the air intake chamber 3105 through the three air inlets 3101. This cycle repeats, ensuring air circulation within the storage room 110 and evenly distributing the temperature within the storage room 110 along with the flowing air. Simultaneously, it keeps the temperature of the windward side wall 111 lower, preventing frost formation on the windward side wall 111.

[0176] During this process, the air flowing through the sterilization module 340 is sterilized and purified by the sterilization module 340.

[0177] During this process, some air will also enter the fan chamber 3104 through the gaps in the spacer structure 313, the lighting chamber 3106, the confluence chamber 3107, the radial cavity 31502 of the air inlet chamber 3105, and the axial cavity 31051 of the air inlet chamber 3105, to cool the lighting module 350 and prevent the lighting module 350 from overheating during operation. Additionally, some air may also enter the air inlet chamber 3105 through the opening 3103 on the top side of the air circulation device 300.

[0178] When the direct-cooling refrigerator 001 detects that the door 200 has been opened, it powers on the lighting module 350 of the air circulation device 300, so that the lighting module 350 provides lighting to the storage compartment 110 where it is located.

[0179] For a direct-cooling refrigerator 001 where the door 200 does not have a transparent area 201, when the direct-cooling refrigerator 001 detects that the door 200 is opened, it powers on the ambient light 370 of the air circulation device 300, so that the user can intuitively understand that the fan 321 is rotating by observing the ambient light emitted by the ambient light 370.

[0180] For a direct-cooling refrigerator 001 with a transparent area 201 in the door 200, the direct-cooling refrigerator 001 can continuously supply power to the ambient light 370.

[0181] Those skilled in the art will understand that this linkage between the ambient light 370 and the fan 321 also allows users to determine whether the air circulation device 300 is malfunctioning by checking whether the ambient light 370 is lit or not.

[0182] The technical solutions of the present invention have been described in conjunction with several embodiments above. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Without departing from the technical principles of the present invention, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to related technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of the present invention will fall within the scope of protection of the present invention.

[0183] Finally, it should be noted that the refrigerator of the present invention is a refrigerator in a broad sense, which includes not only the refrigerator as commonly referred to in the narrow sense, but also preservation equipment with refrigeration and / or freezing functions, such as refrigerators, freezers, etc.

[0184] In this invention, the term "connection" means fluid connectivity, allowing fluid (e.g., air, liquid) to flow between two interconnected entities. Furthermore, this "connection" can be either a leak-free flow of fluid between interconnected entities, or a flow with slight leakage of fluid between interconnected entities.

Claims

1. A visualized air circulation device for direct-cooling refrigerators, the air circulation device comprising: The housing has an air inlet and an air outlet; A fan is arranged inside the housing and is used to drive air into the housing from the air inlet and out of the housing from the air outlet; An ambient light is mounted on the housing and configured to be illuminated when the fan is rotating.

2. The air circulation device according to claim 1, wherein, The brightness and / or flashing frequency of the ambient light are proportional to the rotational speed and / or current of the fan.

3. The air circulation device according to claim 2, wherein, The air circulation device includes a speed sensor for detecting the fan speed, so that the air circulation device controls the brightness and / or flashing frequency of the ambient light by means of the value detected by the speed sensor.

4. The air circulation device according to claim 1, wherein, The air circulation device includes a main body and an extension located on the front side of the main body, wherein the bottom surface of the extension is located on the top side of the bottom surface of the main body; The ambient light is located on the extension.

5. The air circulation device according to claim 4, wherein, The air circulation device also includes a light guide cover for uniformly diffusing the light emitted by the ambient light, the light guide cover being a strip structure that is symmetrical from left to right. The light guide cover includes a horizontal portion, a vertical portion, and a connecting portion. The horizontal portion is disposed on the front of the extension portion and extends left and right. The vertical portion is disposed on the bottom surface of the extension portion and extends front and back. The connecting portion is disposed on the front of the extension portion and connects the horizontal portion to the extension portion.

6. The air circulation device according to any one of claims 1 to 5, wherein, The air circulation device also includes a lighting module; The housing defines an air inlet cavity, a fan cavity for arranging the fan, and a lighting cavity for arranging the lighting module. The air inlet, the air inlet cavity, the fan cavity, and the air outlet are in sequential fluid communication, and the lighting cavity is in communication with the air inlet cavity. The air circulation device also includes a light-transmitting cover mounted on the housing and used to shield the lighting cavity, with a gap formed between the light-transmitting cover and the housing; The ambient light is installed in the gap and is fitted with at least one of the light-transmitting cover and the housing to allow air to enter the lighting cavity from the gap under the action of the fan, thereby cooling the lighting module.

7. The air circulation device according to claim 6, wherein, The air inlet cavity has an opening on its top side, and the circumferential edge of the opening is used to abut against the peripheral wall of the storage compartment of the direct-cooling refrigerator, so that the negative pressure generated when the fan is working will suck the air circulation device to the peripheral wall of the storage compartment or form an air cushion between the air circulation device and the peripheral wall of the storage compartment.

8. The air circulation device according to any one of claims 1 to 5, wherein, The air outlet is located on the rear side of the housing; and / or, The air outlet is configured to allow air blowing from it to tilt downwards; and / or The air circulation device also includes a plurality of deflector plates arranged sequentially in the air outlet along the transverse direction; the interval between two adjacent deflector plates is referred to as the plate interval. In the transverse direction of the air outlet, the plate interval is smaller on the side with higher air pressure near the air outlet, and larger on the side with lower air pressure near the air outlet.

9. A direct-cooling refrigerator, wherein, include: The container is limited to having at least one storage room; The door serves to conceal the storage room; The air circulation device according to any one of claims 1 to 8 is disposed in the storage room and is used to drive the air circulation flow in the storage room to prevent frost from forming on the side walls of the storage room.

10. The direct-cooling refrigerator according to claim 9, wherein, The direct-cooling refrigerator is configured to illuminate the ambient light when the door is opened and the fan is rotating, and to extinguish the ambient light when the door is closed or the fan stops rotating. or, The door has a transparent area, and the direct-cooling refrigerator is configured to be illuminated when the fan is turned on.

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