Direct cooling refrigerator capable of preventing frosting

Abstract

The utility model belongs to the technical field of refrigeration equipment, and particularly provides a direct cooling refrigerator capable of preventing frosting. The direct-cooling refrigerator aims at solving the problem that an existing direct-cooling refrigerator is prone to frosting. In order to achieve the purpose, the direct-cooling refrigerator comprises a refrigerator body and an air supply device. At least one storage chamber is defined in the refrigerator body, and a first quick release structure is arranged on the top of the at least one storage chamber. The air supply device is provided with a second quick release structure matched with the first quick release structure so that the air supply device can be installed on the box body through the second quick release structure, and the air supply device is used for driving air in the storage chamber where the air supply device is located to flow so as to prevent the storage chamber from frosting. The direct cooling refrigerator overcomes the technical problems.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and particularly provides a direct-cooling refrigerator for preventing frosting. Background Art

[0002] A direct-cooling refrigerator, also known as a natural convection refrigerator, is a refrigerator that cools the items inside it by natural convection.

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

[0004] Since the direct-cooling refrigerator uses natural convection for refrigeration, the temperature distribution in the storage compartment is uneven, resulting in a low temperature in the area close to the evaporator, which is prone to frosting, and a high temperature in the area far from the evaporator. When the frost layer is relatively thick, the frost layer will affect the transfer of cold quantity, 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, users need to regularly clean the frost layer in the storage compartment, and the user experience is poor. Summary of the Utility Model

[0005] An object of the utility model is to solve the problem that the existing direct-cooling refrigerator is prone to frosting.

[0006] To achieve the above object, the utility model provides a direct-cooling refrigerator for preventing frosting, including:

[0007] A box body defining at least one storage compartment, and a first quick-release structure is arranged at the top of at least one of the storage compartments;

[0008] A blowing device provided with a second quick-release structure matching the first quick-release structure, so that the blowing device is installed on the box body through the second quick-release structure, and the blowing device is used to drive the air flow in the storage compartment where it is located to prevent frosting in the storage compartment.

[0009] Optionally, the first quick-release structure and the second quick-release structure are plugged together in a plug-in manner.

[0010] Optionally, one of the first quick-release structure and the second quick-release structure is set as a columnar structure with an end cap, and the other of the first quick-release structure and the second quick-release structure is set as a U-shaped structure, and the columnar structure is embedded in the U-shaped structure and the end cap stops the U-shaped structure in the vertical direction.

[0011] Optionally, the first quick-release structure is disposed at the rear side of the top wall of the storage compartment, and the second quick-release structure is disposed at the rear top of the air supply device; a first connection structure is provided at the front side of the first quick-release structure on the box body, and a second connection structure is provided at the front part of the air supply device, so that the air supply device is fixed to the box body through the first connection structure and the second connection structure.

[0012] Optionally, the first connection structure is a threaded hole, and the second connection structure is a through hole aligned with the threaded hole, so that a bolt or a screw penetrates through the through hole and is tightened with the threaded hole to fix the air supply device to the box body.

[0013] Optionally, the air supply device includes a housing and a fan located inside the housing. An opening communicating with the air inlet side of the fan is provided at the top side of the housing, and the circumferential edge of the opening abuts against or is adjacent to the top wall of the storage compartment, so that the negative pressure generated when the fan operates sucks the air supply device onto the top wall of the storage compartment or forms an air cushion between the air supply device and the top wall of the storage compartment.

[0014] Optionally, the housing defines a fan chamber and an air inlet chamber located at the top side of the fan chamber; the opening is formed at the top side of the air inlet chamber; the air inlet of the air supply device is formed on the circumferential wall of the air inlet chamber, and the air outlet of the air supply device is formed in the area where the housing communicates with the fan chamber.

[0015] Optionally, the fan is a centrifugal fan.

[0016] Optionally, a sunk groove is provided on the top wall of the storage compartment, and the air supply device is installed in the sunk groove.

[0017] Optionally, the sunk groove extends backward to the rear side wall of the storage compartment; and / or, the sunk groove is located in the middle of the storage compartment in the transverse direction; and / or, the depth of the front part of the sunk groove gradually decreases from back to front, and the height of the front part of the air supply device gradually decreases from back to front.

[0018] Based on the foregoing description, those skilled in the art can understand that in the foregoing technical solution of the present invention, by arranging an air supply device in the storage compartment, the air in the storage compartment can circulate under the action of the air supply device, so that the cold quantity and temperature distribution in the storage compartment are more uniform, avoiding too low temperature in the area near the evaporator in the storage compartment, and thus effectively avoiding frosting in this area. By providing a first quick-release structure on the top of the storage compartment and a second quick-release structure matching the first quick-release structure on the air supply device, the air supply device can be installed on the box body through the first quick-release structure and the second quick-release structure, which facilitates the installation, disassembly and maintenance of the air supply device.

[0019] Further, by arranging the first quick-release structure at the rear side of the top wall of the storage compartment and the second quick-release structure at the rear top of the air supply device; and arranging a first connection structure on the front side of the first quick-release structure of the box body and a second connection structure on the front part of the air supply device, the air supply device can be pre-installed on the box body through the first quick-release structure and the second quick-release structure, and thus the positioning of the air supply device and the box body is completed, and then it is completely fixed to the box body through the first connection structure and the second connection structure.

[0020] Further, by arranging an opening communicating with the air inlet side of the fan on the top side of the housing and making the circumferential edge of the opening abut against or be adjacent to the top wall of the storage compartment, the negative pressure generated when the fan works sucks the air supply device onto the top wall of the storage compartment, or forms an air cushion between the air supply device and the top wall of the storage compartment. In this way, not only a part of the gravity of the air supply device is offset, the reliability of the connection between the air supply device and the box body is strengthened, but also the air inlet area of the air supply device is increased. At the same time, the air cushion formed between the air supply device and the top wall of the storage compartment can also play a role in shock absorption, thereby reducing the noise generated when the air supply device operates.

[0021] Other beneficial effects of the present utility model will be described in detail in combination with the accompanying drawings hereinafter, so that those skilled in the art can more clearly understand the improvement objectives, features and advantages of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present utility model, some embodiments of the present utility model will be described hereinafter with reference to the accompanying drawings. Those skilled in the art should understand that the components or parts denoted by the same reference numerals in different drawings are the same or similar; the drawings of the present utility model are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 is a three-dimensional effect schematic diagram of a direct-cooling refrigerator provided by the present utility model;

[0024] Figure 2 is Figure 1 a partial cross-sectional view of the direct-cooling refrigerator along the A-A direction;

[0025] Figure 3 is Figure 1 a partial three-dimensional effect schematic diagram of the top wall of the storage compartment of the direct-cooling refrigerator;

[0026] Figure 4 is a first structural exploded view of the air supply device in some embodiments of the present utility model;

[0027] Figure 5 is a second structural exploded view of the air supply device in some embodiments of the present utility model;

[0028] Figure 6 is the third structural decomposition diagram of the air supply device in some embodiments of the present utility model;

[0029] Figure 7 is Figures 4 to 6 the first axonometric view of the air supply device in

[0030] Figure 8 is Figures 4 to 6 the second axonometric view of the air supply device in

[0031] Figure 9 is Figures 4 to 6 the third axonometric view of the air supply device in

[0032] Figure 10 is Figure 7 the sectional view of the air supply device along the B-B direction in

[0033] Figure 11 is Figure 7 the sectional view of the housing of the air supply device along the B-B direction in

[0034] Figure 12 is Figure 7 the sectional view of the air supply device along the C-C direction in

[0035] Figure 13 is Figures 4 to 12 the first axonometric view of the main housing in

[0036] Figure 14 is Figures 4 to 12 the second axonometric view of the main housing in

[0037] Figure 15 is Figure 14 the sectional view of the main housing along the D-D direction in

[0038] Figure 16 is Figures 4 to 12 the third axonometric view of the main housing in

[0039] Figure 17 is Figures 4 to 6 the axonometric view of the sterilization module in

[0040] Figure 18 is the axonometric view of the sterilization module in some other embodiments of the present utility model.

[0041] Explanation of reference numerals:

[0042] 001, direct-cooling refrigerator;

[0043] 100, Cabinet; 110, Storage compartment; 111, Windward side wall; 112, Sunk groove; 113, First quick-release structure; 1131, End cap; 114, First connection structure;

[0044] 200, Door body; 201, Transparent area;

[0045] 300, Air supply device; 301, Main body part; 302, Extension part;

[0046] 310, Housing; 310a, Main housing; 310b, Bottom housing; 3101, Air inlet; 31011, Strip-shaped hole; 3102, Air outlet; 3103, Open end; 3104, Fan cavity; 3105, Air inlet cavity; 31051, Axial cavity part; 31502, Radial cavity part; 3106, Lighting cavity; 3107, Confluence cavity; 311, Second quick-release structure; 312, Second connection structure; 313, Spacing structure;

[0047] 321, Fan; 322, Fixed bracket;

[0048] 330, Drainage plate; 331, Plate spacing;

[0049] 340, Sterilization module; 341, Ventilation hole; 342, Positive electrode component; 343, Negative electrode component; 344, Outer frame;

[0050] 350, Lighting module;

[0051] 360, Light-transmitting cover; 3601, Air intake structure; 361, Upper inclined plate; 362, Lower inclined plate;

[0052] 370, Ambient light;

[0053] 380, Light guide cover; 381, Horizontal part; 382, Vertical part; 383, Connection part; 384, Upward-curving part;

[0054] 390, Rotation speed sensor;

[0055] 400, Evaporator. Detailed implementation manners

[0056] Those skilled in the art should understand that the embodiments described below are only a part of the embodiments of the present utility model, rather than all the embodiments of the present utility model. This part of the embodiments is intended to explain the technical principle of the present utility model, and is not intended to limit the protection scope of the present utility model. Based on the embodiments provided by the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts should still fall within the protection scope of the present utility model.

[0057] It should be noted that in the description of the present utility model, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0058] Furthermore, it should be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can also be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. For example, the terms "installed", "connected", "coupled" and "fixed", without special description, can specifically be any feasible connection forms such as bolt connection, screw connection, welding, plug connection, riveting, fusion welding, snap connection, etc.

[0059] In addition, it should be noted that in the description of the present utility model, the terms "cooling capacity" and "heat quantity" are two descriptions of the same physical state. That is, the higher the "cooling capacity" of a certain target object (such as an evaporator, air, condenser, etc.), the lower the "heat quantity", and the lower the "cooling capacity", the higher the "heat quantity". When a certain target object absorbs "cooling capacity", it will release "heat quantity", and when it releases "cooling capacity", it will absorb "heat quantity". A certain target object stores "cooling capacity" or "heat quantity" to keep the current temperature of the target object. "Refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon, that is, a certain target object (such as an evaporator) will absorb heat while refrigerating.

[0060] As Figure 1 shown, in the present utility model, the direct-cooling refrigerator 001 for preventing frosting includes a box body 100, a door body 200, a blowing device 300, and an evaporator 400 for refrigeration.

[0061] Among them, the box body 100 defines at least one storage compartment 110. At least one storage compartment 110 includes at least one of a refrigerating compartment, a freezing compartment, and a variable-temperature compartment.

[0062] Among them, the door body 200 is rotatably installed on the box body 100 and is used to shield the storage compartment 110. Those skilled in the art can, according to needs, 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.

[0063] Among them, the air supply device 300 is installed on the inner top of the storage compartment 110. Those skilled in the art can, according to needs, respectively configure at least one air supply device 300 for each storage compartment 110, or configure at least one air supply device 300 for at least one of all the storage compartments 110.

[0064] Among them, the evaporator 400 is installed on the box body 100 and is used to provide cold for the storage compartment 110.

[0065] As Figure 2 shown, in the present utility model, a sunken groove 112 is provided on the top wall of the storage compartment 110, and the air supply device 300 is installed in the sunken groove 112 to hide a part of the air supply device 300, so as to optimize the aesthetics of the direct-cooling refrigerator 001 and prevent the air supply device 300 from being knocked against when the user takes and places items.

[0066] Furthermore, the sunken groove 112 extends backward to the rear side wall of the storage compartment 110 so that the installation position of the air supply device 300 is as far back as possible.

[0067] Optionally, the sunken groove 112 is located in the middle of the storage compartment 110 in the transverse direction so that the air supply device 300 can also be located in the middle of the storage compartment 110 in the transverse direction, so that the air driven by it can flow evenly in the storage compartment 110.

[0068] Optionally, the depth of the front part of the sunken groove 112 gradually decreases from back to front, and the height of the front part of the air supply device 300 gradually decreases from back to front to reasonably arrange the components in the air supply device 300.

[0069] Of course, those skilled in the art can also, according to needs, omit the above-mentioned sunken groove 112. However, in this case, the air supply 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.

[0070] As Figure 2 shown, in the present utility model, the air supply device 300 includes a housing 310 and a fan 321.

[0071] Continue to refer to Figure 2 , the housing 310 has an air inlet 3101 and an air outlet 3102. Denote the side wall of the storage compartment 110 opposite to the air outlet 3102 as the windward side wall 111 (as Figure 1 and Figure 2The rear side wall of the storage compartment 110 shown), the air outlet 3102 slopes downward in a direction close to the windward side wall 111.

[0072] In the present utility model, at least a part of the evaporator 400 corresponds to the windward side wall 111. In other words, the evaporator 400 is arranged at the windward side wall 111, and at least a part of the evaporator 400 is installed on the outer or inner side of the windward side wall 111, so that the windward side wall 111 can receive the cold of the evaporator 400 and has a lower temperature.

[0073] From Figure 2 It can be seen that in the present utility model, the air supply device 300 is arranged at the rear part 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, and the gap between the air outlet 3102 (located at the rear of the housing 310) and the windward side wall 111 is reduced.

[0074] Continue to refer to Figure 2 , the 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 out an air flow that is inclined downward and shoots towards 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.

[0075] In the present utility model, the fan 321 is a centrifugal fan. Of course, those skilled in the art can also, according to needs, set the fan 321 as any feasible fan such as an axial flow fan, an inclined flow fan, a cross-flow fan, etc., and make adaptive adjustments to the structures of other components of the air supply device 300.

[0076] Continue to refer to Figure 2 , the angle between the tangent line of the bottom wall of the air outlet 3102 and the windward side wall 111 is denoted as α, then 10° ≤ α ≤ 75°. The angle between the tangent line of the bottom wall of the air outlet 3102 and the tangent line of the top wall is denoted as β, then 5° ≤ β ≤ 175°.

[0077] In the present utility model, α and β are used to make the air flow blown out from the air outlet 3102 be able to flow along the surface of the windward side wall 111 in the vertical direction and flow through more areas of the windward side wall 111.

[0078] Furthermore, 15° ≤ α ≤ 45°, and / or, 15° ≤ β ≤ 165°.

[0079] Exemplarily, 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.

[0080] Furthermore, α and β satisfy the following functional relationship:

[0081] α = (β + w ÷ w1 - b) ÷ h × h1

[0082] Wherein, w is the width of the air supply device 300 (as Figure 1 shown), and h is the height of the air supply device 300 (as Figure 2 shown).

[0083] Wherein, w1 is any value selected from 200 mm to 500 mm, such as 200 mm, 222 mm, 250 mm, 350 mm, 398 mm, 456 mm, 480 mm, 500 mm, etc.

[0084] Wherein, h1 is any value selected from 40 mm to 60 mm, such as 40 mm, 42 mm, 550 mm, 60 mm, etc.

[0085] Wherein, b is any value selected from 10° to 15°, such as 10°, 11°, 13°, 14.5°, 15°, etc.

[0086] In the present utility model, α and β satisfying the above functional 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 to say, 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 in this area is taken away by the airflow to prevent frosting.

[0087] As Figure 2 and Figure 3 shown, in the present utility model, a first quick-release structure 113 and a first connection structure 114 are provided on the top of the storage compartment 110 configured with the air supply device 300 to fix the air supply device 300 through the first quick-release structure 113 and the first connection structure 114. Specifically, the air supply device 300 can be first connected or pre-fixed to the box body 100 through the first quick-release structure 113, and then the air supply device 300 can be completely fixed to the box body 100 through the first connection structure 114.

[0088] It can be seen from Figure 2 and Figure 3 that the first quick-release structure 113 and the first connection structure 114 are provided on the top wall of the sunken groove 112 to ensure that the air supply device 300 can be installed in the sunken groove 112.

[0089] As Figure 3As shown, the first quick-release structure 113 may be a cylindrical structure with an end cap 1131, and the first connection structure 114 may be a threaded hole. Moreover, the number of each of the first quick-release structure 113 and the first connection structure 114 is not limited to Figure 3 the two shown in

[0090] but may also be any other feasible number such as one, three, four, five, etc.

[0091] In addition, those skilled in the art may also, according to needs, set the first quick-release structure 113 to any other feasible structure, such as a slot, a buckle, a magnet, a slide rail, etc.

[0092] Correspondingly, those skilled in the art may also, according to needs, set the first connection structure 114 to any other feasible structure, such as a threaded post, a buckle, a magnet, etc.

[0093] Next, with reference to Figures 4 to 18 further examples of the air supply device 300 in the present utility model will be given.

[0094] As Figures 4 to 7 , Figures 9 to 11 , Figures 13 to 16 shown, in some embodiments of the present utility model, a second quick-release structure 311 matching the first quick-release structure 113 is provided on the housing 310, so that the air supply device 300 is installed on the box body 100 through the second quick-release structure 311.

[0095] Furthermore, the second quick-release structure 311 is set as a U-shaped structure, so that the first quick-release structure 113 and the second quick-release structure 311 are plugged together in a plug-in manner.

[0096] 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 plug-in connection between the first quick-release structure 113 and the second quick-release structure 311.

[0097] In addition, in other embodiments of the present utility model, those skilled in the art may also, according to needs, set the second quick-release structure 311 to Figure 3 the first quick-release structure 113 shown in Figure 4 - the cylindrical structure with an end cap 1131, and set the first quick-release structure 113 to

[0098] As Figures 4 to 7 shown, in some embodiments of the present utility model, the second quick-release structure 311 is disposed at the rear top of the air supply device 300 to be adapted to the first quick-release structure 113 disposed at the rear side of the top wall of the storage chamber 110.

[0099] Of course, those skilled in the art can also appropriately adjust the installation positions of the second quick-release structure 311 and the first quick-release structure 113 according to needs. For example, the second quick-release structure 311 can be disposed at the front side or the middle position of the top of the air supply device 300.

[0100] As Figures 4 to 7 , Figures 9 to 11 , Figure 13 and Figure 16 shown, in some embodiments of the present utility model, a second connection structure 312 matching the first connection structure 114 is disposed on the housing 310, so that the air supply device 300 is fixed to the box body 100 through the first connection structure 114 and the second connection structure 312.

[0101] In some embodiments of the present utility model, the air supply device 300 is first pre-installed on the box body 100 through the first quick-release structure 113 and the second quick-release structure 311, and then fixed to the box body 100 through the first connection structure 114 and the second connection structure 312, which not only facilitates the installation and disassembly of the air supply device 300, but also realizes the fixation between the air supply device 300 and the box body 100.

[0102] Furthermore, the second connection structure 312 is a through hole to be aligned with the first connection structure 114 provided as a threaded hole, so that a bolt or a screw penetrates through the through hole and is tightened with the threaded hole to fix the air supply device 300 to the box body 100.

[0103] In addition, in other embodiments of the present utility model, those skilled in the art can also, according to needs, omit the setting of the second connection structure 312, and make the air supply device 300 be installed on the box body 100 only 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 respectively disposed on the front side and the rear side of the housing 310, or other types of quick-release structures are disposed on the front side of the housing 310 to fixedly install the air supply device 300 on the box body 100.

[0104] As Figure 4 , Figure 7 , Figure 11 , Figures 13 to 16As shown, in some embodiments of the present utility model, an opening 3103 communicating with the air inlet side of the blower 321 is provided on the top side of the housing 310, 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 when the blower 321 operates sucks the air supply device 300 onto the top wall of the storage compartment 110 or forms an air cushion between the air supply device 300 and the top wall of the storage compartment 110.

[0105] Among them, the circumferential edge of the opening 3103 abutting against the top wall of the storage compartment 110 may be that a part or all of the circumferential edge of the opening 3103 abuts against the top wall of the storage compartment 110.

[0106] Among them, the circumferential edge of the opening 3103 being adjacent to the top wall of the storage compartment 110 specifically means that the distance between the circumferential edge and the top wall is less than a set value, and the set value is not greater than 10 mm, preferably not greater than 5 mm, further preferably not greater than 3 mm, and still further preferably not greater than 1 mm.

[0107] Those skilled in the art can understand that the above setting of the opening 3103, especially when a part of the circumferential edge of the opening 3103 abuts against the top wall of the storage compartment 110 or the circumferential edge of the opening 3103 is adjacent to the top wall of the storage compartment 110, enables the air supply device 300 to be sucked onto the top wall of the storage compartment 110 by means of the negative pressure generated when the blower 321 operates, offsetting a part of the gravity of the air supply device 300. This not only strengthens the reliability of the connection between the air supply device 300 and the box body 100, but also increases the air inlet area of the air supply device 300. At the same time, the air cushion formed between the air supply device 300 and the top wall of the storage compartment 110 can also play a role in shock absorption, thereby reducing the noise generated when the air supply device 300 operates.

[0108] As Figures 4 to 7 、 Figures 10 to 16 shown, in some embodiments of the present utility model, the housing 310 may further define a blower cavity 3104 and an air inlet cavity 3105 located on the top side of the blower cavity 3104, and the opening 3103 is formed on the top side of the air inlet cavity 3105. Moreover, the air inlet 3101 of the air supply device 300 is formed on the circumferential wall of the air inlet cavity 3105, and the air outlet 3102 of the air supply device 300 is formed in the area where the housing 310 communicates with the blower cavity 3104.

[0109] As Figure 4 、 Figures 10 to 13 and Figure 16As shown, in some embodiments of the present utility model, 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.

[0110] Among them, air inlets 3101 are respectively arranged on the left side, right side of the axial cavity portion 31051 and the bottom side of the radial cavity portion 31502.

[0111] In other embodiments of the present utility model, those skilled in the art can also, according to needs, only arrange air inlets 3101 on one or two of the left side, right side of the axial cavity portion 31051 and the bottom side of the radial cavity portion 31502.

[0112] Such as Figures 4 to 11 、 Figures 13 to 16 As shown, in some embodiments of the present utility model, the air inlet 3101 is arranged as a multi-row strip-shaped hole 31011, and the lengths of the strip-shaped holes 31011 in the same row are different. Optionally, the spacing structure 313 between two adjacent strip-shaped holes 31011 in the same row is aligned with a strip-shaped hole 31011 in an adjacent row.

[0113] Those skilled in the art can understand that the above setting form of the air inlet 3101 can optimize the appearance of the air supply device 300, making the air supply device 300 look more beautiful as a whole.

[0114] Such as Figures 4 to 11 As shown, in some embodiments of the present utility model, the housing 310 may include a main housing 310a and a bottom housing 310b. The air inlet cavity 3105 and the air inlets 3101 are formed on the main housing 310a, and the fan cavity 3104 and the 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 connection, etc.

[0115] Those skilled in the art can understand that the above 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.

[0116] Such as Figures 4 to 10 As shown, in some embodiments of the present utility model, the air supply device 300 further includes a fixing bracket 322, a drainage plate 330, a sterilization module 340, a lighting module 350, a light-transmitting cover 360, an atmosphere lamp 370 and a light guide cover 380.

[0117] Among them, the fixing bracket 322 is used to fix the fan 321 to the housing 310, the air guiding plate 330 is used to make air blow out evenly from the air outlet 3102, the sterilization module 340 is used to sterilize the air flowing through the air supply device 300, the lighting module 350 is used to provide lighting for the storage compartment 110 where the air supply device 300 is located, the light-transmitting cover 360 is used to cover and hide the lighting module 350, the ambient light 370 is used to provide ambient light for the storage compartment 110 where the air supply device 300 is located, and the light guide cover 380 is used to evenly diffuse the light emitted by the ambient light 370.

[0118] In addition, in other embodiments of the present invention, those skilled in the art can also omit at least one of the air guiding 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 according to actual needs.

[0119] The fixing bracket 322, the air guiding 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 will be described item by item below with reference to the accompanying drawings.

[0120] As Figures 4 to 6 and Figure 10 shown, in some embodiments of the present invention, the fixing bracket 322 is fixedly connected to the housing 310 and the fan 321 respectively (such as bolt connection, screw connection, snap connection, 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 also, according to needs, integrally form the fixing bracket 322 with one of the main housing 310a and the bottom housing 310b. Or integrally form the fixing bracket 322 with the non-rotating part of the fan 321.

[0121] As Figure 5 、 Figure 6 、 Figures 9 to 12 、 Figure 14 and Figure 15 shown, a plurality of air guiding plates 330 are arranged at the air outlet 3102, and the plurality of air guiding plates 330 are sequentially spaced apart in the transverse direction of the air outlet 3102.

[0122] Further, the plurality of air guiding plates 330 can be fixedly connected to or integrally formed with the housing 310, especially the main housing 310a. The fixed connection includes bonding, plugging, welding, etc.

[0123] As Figure 12As shown, if the interval between two adjacent flow guiding plates 330 is denoted as the plate interval 331, then in the transverse 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 smaller air pressure near the air outlet 3102 is larger.

[0124] Those skilled in the art can understand that by arranging a plurality of flow guiding plates 330 at the air outlet 3102, the air flow blown out from the air outlet 3102 can be divided into multiple strands in the transverse direction. By making the plate interval 331 on the side with greater air pressure near the air outlet 3102 smaller and the plate interval 331 on the side with smaller air pressure near the air outlet 3102 larger, the flow rate and velocity of each air flow are made as identical as possible, so that the air flow blown out from the air outlet 3102 is more uniform.

[0125] Continue to refer to Figure 12 , along the direction of the air pressure decreasing 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 intervals 331 among all the plate intervals 331 is selected from any value between 0.4 and 0.6 (such as 0.4, 0.45, 0.5, 0.58, 0.6, etc.) to make the flow velocities of the air flows blown out from each plate interval 331 as equal as possible.

[0126] Furthermore, any plate interval 331 is selected from any value between 2 mm and 20 mm (such as 2 mm, 3 mm, 5 mm, 6 mm, 8 mm, 9 mm, 10 mm, 12 mm, 15 mm, 18 mm, 20 mm, etc.), and in particular, it can be selected from any value between 5 mm and 10 mm, so as to ensure that the flow velocities of the air flows blown out from each plate interval 331 are as equal as possible while avoiding the plate interval 331 being too small, which may cause a large obstruction to the air flow.

[0127] Continue to refer to Figure 12 , in the transverse direction of the air outlet 3102, the thickness of the flow guiding plate 330 on the side with greater air pressure near the air outlet 3102 is larger, and the thickness of the flow guiding plate 330 on the side with smaller air pressure near the air outlet 3102 is smaller.

[0128] Those skilled in the art can understand that in the transverse direction of the air outlet 3102, by making the thickness of the flow guiding plate 330 on the side with greater air pressure near the air outlet 3102 larger, the vibration of the flow guiding plate 330 when impacted by the faster air flow is avoided. By making the thickness of the flow guiding plate 330 on the side with smaller air pressure near the air outlet 3102 smaller, the obstruction of the flow guiding plate 330 to the air flow is reduced.

[0129] Further, the thickness of any drainage plate 330 is selected from any value between 0.5 mm and 3 mm, such as 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.

[0130] As Figures 4 to 7 and Figure 10 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.

[0131] As Figure 7 and Figure 10 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.

[0132] Further, those skilled in the art can, according to needs, make each air inlet 3101 respectively correspond to at least one sterilization module 340, or make one or more of all the air inlets 3101 respectively correspond to at least one sterilization module 340.

[0133] Further, in some embodiments of the present invention, the sterilization module 340 is a structure made of a material with sterilization function. The material with sterilization function includes copper ions or silver ions.

[0134] As Figure 17 shown, in some embodiments of the present invention, the sterilization module 340 is provided with a plurality of ventilation holes 341 allowing air to flow through, so as to increase the contact area between the sterilization module 340 and the air.

[0135] In addition, in other embodiments of the present invention, those skilled in the art can also, according to needs, set the sterilization module 340 to any other feasible structure or device, such as a negative ion sterilization device, an ultraviolet sterilization device, an electrostatic sterilization device, an ozone sterilization device.

[0136] Exemplarily, in Figure 18 shown in other embodiments, the sterilization module 340 includes a positive electrode member 342 and a negative electrode member 343, so that the sterilization module 340 sterilizes and deodorizes the air by electrostatic adsorption when the positive electrode member 342 and the negative electrode member 343 are energized. Specifically, when high-voltage electricity is applied to the positive electrode member 342 and the negative electrode member 343, 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.

[0137] Continue to refer to Figure 18, the positive electrode member 342 and the negative electrode member 343 are in a comb-like structure that interleaves with each other, and the sterilization module 340 further includes an outer frame 344 disposed 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. And, the outer frame 344 is made of an insulating material.

[0138] As Figures 4 to 7 and Figure 10 shown, the lighting module 350 is installed on the housing 310 to illuminate the storage compartment 110 where the air supply device 300 is located when the door body 200 of the direct-cooling refrigerator 001 is opened.

[0139] In some embodiments of the present invention, 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.

[0140] Exemplarily, the direct-cooling refrigerator 001 is configured with a door switch 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 switch sensor indicating that the door body 200 is opened, the controller controls the direct-cooling refrigerator 001 to energize 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 switch sensor indicating that the door body 200 is closed, the controller controls the direct-cooling refrigerator 001 to cut off the power supply to the lighting module 350 to turn off the lighting module 350.

[0141] Among them, the door switch sensor can be any feasible sensor such as a magnetic contact sensor, a photoelectric sensor, a mechanical micro switch, an ultrasonic sensor, etc.

[0142] Furthermore, in some embodiments of the present invention, the lighting module 350 can be fixed to the housing 310 by any feasible connection method, and this connection method can be screw connection, snap connection, bonding, magnetic attraction connection, etc.

[0143] In some embodiments of the present invention, the lighting module 350 includes 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.

[0144] As Figures 4 to 7 , Figure 10 , Figure 11 , Figure 12 , Figure 14 and Figure 15As shown, in some embodiments of the present utility model, 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 operates, an air flow flowing through the illumination cavity 3106 is generated, thereby cooling the illumination module 350 in the illumination cavity 3106.

[0145] As can be seen from the figure, the second connection structure 312 is a through hole formed on the top wall of the illumination cavity 3106.

[0146] As Figure 12 、 Figure 13 and Figure 16 shown, in some embodiments of the present utility model, the main housing 310a further defines a confluence cavity 3107, and the confluence cavity 3107 is located between the illumination cavity 3106 and the air inlet cavity 3105.

[0147] As Figure 12 shown, the illumination 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 are distributed in sequence from front to back and are in fluid communication in sequence.

[0148] As Figures 4 to 10 and Figure 12 shown, in some embodiments of the present utility model, the air supply device 300 further includes a light-transmitting cover 360 installed on the housing 310 and used to shield the illumination cavity 3106, and an air intake structure 3601 communicating with the illumination cavity 3106 is provided between at least one or both of the light-transmitting cover 360 and the housing 310 (as Figure 12 shown), so that under the action of the fan 321, air enters the illumination cavity 3106 from the air intake structure to cool the illumination module 350.

[0149] As Figure 12 shown, the air intake structure 3601 may specifically be a gap formed between the housing 310 and the light-transmitting cover 360.

[0150] Furthermore, the light-transmitting cover 360 can be fixed to the housing 310 by any feasible connection method, and this connection method can be screw connection, snap connection, bonding, magnetic attraction connection, etc.

[0151] As Figure 4 、 Figure 5 and Figure 10 shown, in some embodiments of the present utility model, the light-transmitting cover 360 includes an upper inclined plate 361 that extends obliquely backward and upward from its front end and a lower inclined plate 362 that extends obliquely backward and downward from its front end, and the upper inclined plate 361 is connected to the lower inclined plate 362.

[0152] As Figure 10As shown, in the assembled state, the light-transmitting cover 360 abuts against the top wall (main housing 310a) of the lighting cavity 3106 through the inclined plate 361 thereon, and reserves an installation space for the ambient light 370 and the light guide cover 380, so as to install the ambient light 370 and the light guide cover 380 on the main housing 310a. The lower inclined plate 362 is adapted to the front end face of the main housing 310a.

[0153] In some embodiments of the present utility model, the ambient light 370 may include an LED lamp, an optical fiber lamp, etc.

[0154] In some embodiments of the present utility model, the ambient light 370 can be fixed together with the main housing 310a and / or the light-transmitting cover 360 by any feasible connection means, such as screw connection, snap connection, bonding, magnetic attraction connection, etc. The light guide cover 380 can also be fixed together with the main housing 310a and / or the light-transmitting cover 360 by any feasible connection means, such as screw connection, snap connection, bonding, magnetic attraction connection, etc.

[0155] As Figure 10 and Figure 12 shown, in some embodiments of the present utility model, a part of the light guide cover 380 is located in front of the upper inclined plate 361, and a part is located in the gap serving as the air intake structure 3601. Moreover, the area of the air intake structure 3601 where the light guide cover 380 is arranged is not filled by the light guide cover 380, and there is still a gap.

[0156] As Figures 4 to 6 shown, in some embodiments of the present utility model, the light guide cover 380 is generally a bar-shaped structure that is symmetric about the left and right, and the light guide cover 380 includes a transverse portion 381, a longitudinal portion 382, and a connecting portion 383. The transverse portion 381 is arranged on the front surface of the extending portion 302 and extends left and right. The longitudinal portion 382 is arranged on the bottom surface of the extending portion 302 and extends back and forth. The connecting portion 383 is arranged on the front surface of the extending portion 302 and connects the transverse portion 381 to the extending portion 302.

[0157] Furthermore, the light guide cover 380 may further include an upturned portion 384 located at the rear side of the longitudinal portion 382, so that the light guide cover 380 clamps the light-transmitting cover 360 in the middle in the front-rear direction and the left-right direction respectively, thereby enhancing the structural stability of the light guide cover 380. Optionally, the light guide cover 380 can be bonded to the light-transmitting cover 360, and thus the light guide cover 380 surrounds a part of the light-transmitting cover 360, making the ambient light transmitted from the light guide cover 380 more beautiful.

[0158] In addition, in other embodiments of the present utility model, those skilled in the art can also, according to needs, omit the setting of the light guide cover 380 and set the ambient light 370 as a light strip, such as an LED light strip.

[0159] Further, in some embodiments of the present utility model, the ambient light 370 is configured to be lit when the blower 321 rotates. Moreover, the brightness and / or the blinking frequency of the ambient light 370 can be made proportional to the rotational speed and / or the current of the blower 321.

[0160] As an example 1, as Figure 12 shown, the air supply device 300 further includes a rotational speed sensor 390 for detecting the rotational speed of the blower 321, so that the air supply device 300 controls the brightness and / or the blinking frequency of the ambient light 370 according to the value detected by the rotational speed sensor 390.

[0161] Among them, the rotational speed sensor 390 can be any feasible sensor such as a magnetoelectric rotational speed sensor, an optoelectronic rotational speed sensor, a Hall effect rotational speed sensor, an eddy current rotational speed sensor, etc.

[0162] As an example 2, the controller of the air supply device 300 detects the current of the blower 321 in real time, so that the air supply device 300 controls the brightness and / or the blinking frequency of the ambient light 370 according to the magnitude of the current.

[0163] Further, in some embodiments of the present utility model, the direct-cooling refrigerator 001 is configured to light the ambient light 370 when the door body 200 is opened and the blower 321 rotates, and extinguish the ambient light 370 when the door body 200 is closed or the blower 321 stops rotating. Thus, when the user opens the door body 200, by observing whether the ambient light 370 is lit, it can be determined whether the air supply device 300 is working, making the air supply function of the air supply device 300 visual.

[0164] Exemplarily, the direct-cooling refrigerator 001 is configured with a door opening / closing sensor for detecting the opening and closing of the door body 200 (which can be the same as the door opening / closing sensor described above). When the controller of the direct-cooling refrigerator 001 receives the signal sent by the door opening / closing sensor indicating that the door body 200 is opened, the controller controls the direct-cooling refrigerator 001 to energize the ambient light 370 to light the ambient light 370. When the controller of the direct-cooling refrigerator 001 receives the signal sent by the door opening / closing sensor indicating that the door body 200 is closed, the controller controls the direct-cooling refrigerator 001 to cut off the power supply of the ambient light 370 to extinguish the ambient light 370.

[0165] Alternatively, those skilled in the art can also, according to needs, set a transparent area 201 on the door body 200 (as Figure 1 shown), and configure the direct-cooling refrigerator 001 to be lit when the blower 321 rotates, so that the user can observe through the transparent area 201 whether the ambient light 370 is lit, and further determine whether the air supply device 300 is working.

[0166] As Figure 7 and Figure 12As shown, in some embodiments of the present utility model, the air supply device 300 generally includes a main body portion 301 and an extension portion 302 (the portion located in front of the double-dot dash line) located on the front side of the main body portion 301 (the portion located behind the double-dot dash line). A blower cavity 3104 and an air inlet cavity 3105 are formed on the main body portion 301, and a lighting cavity 3106 is formed on the extension portion 302. A confluence cavity 3107 can be formed on the main body portion 301, can also be formed on the extension portion 302, or can be formed between the main body portion 301 and the extension portion 302.

[0167] As can be seen Figure 7 from, the bottom surface of the extension portion 302 is located on the top side of the bottom surface of the main body portion 301, so that when viewed from the front side of the air supply device 300, especially when the user opens the door body 200 of the direct-cooling refrigerator 001, the air supply device 300 has a sense of paragraph visually and is more beautiful.

[0168] It should be noted that the main body portion 301 and the extension portion 302 are two opposite parts on the air supply device 300, and can have a clear demarcation line (such as Figure 7 and Figure 12 the double-dot dash line in), or may not have a clear demarcation line.

[0169] As can be seen Figure 7 and Figure 12 from, the lighting module 350, the light-transmitting cover 360, the atmosphere lamp 370 and the light guide cover 380 are all arranged on the extension portion 302, thus avoiding the vertical distribution of these four components and the blower 321, and reducing the overall thickness of the air supply device 300.

[0170] Next, with reference to Figure 1 , Figure 2 , Figure 7 and Figure 10 the working principle of the air supply device 300 in some embodiments of the present utility model will be briefly described.

[0171] When the air supply device 300 is operating, the rotating fan 321 drives air to enter the air inlet chamber 3105 from three air inlets 3101. Subsequently, the air passes through the fan chamber 3104 and is blown from the air outlet 3102 towards the windward sidewall 111 of the storage compartment 110, and flows downward along the windward sidewall 111. The air flowing downward along the windward sidewall 111 will gradually spread. In particular, the air that reaches the bottom of the windward sidewall 111 and loses its kinetic energy will spread horizontally throughout the entire storage compartment 110. Then, the air in the storage compartment 110 enters the air inlet chamber 3105 again through the three air inlets 3101. This cycle repeats, causing the air in the storage compartment 110 to circulate, and making the temperature in the storage compartment 110 evenly distributed along with the flowing air. At the same time, the temperature of the windward sidewall 111 is kept relatively low, preventing frosting on the windward sidewall 111.

[0172] During this process, the air flowing through the sterilization module 340 is sterilized and purified by the sterilization module 340.

[0173] During this process, some air also enters the fan chamber 3104 through the gaps serving as the spacer structure 313, the lighting chamber 3106, the confluence chamber 3107, the radial chamber portion 31502 of the air inlet chamber 3105, and the axial chamber portion 31051 of the air inlet chamber 3105 to cool the lighting module 350 and prevent the temperature of the lighting module 350 from getting too high during operation. And some air may also enter the air inlet chamber 3105 through the opening 3103 on the top side of the air supply device 300.

[0174] When the direct-cooling refrigerator 001 detects that the door body 200 is opened, it powers on the lighting module 350 of the air supply device 300, enabling the lighting module 350 to provide lighting for the storage compartment 110 where it is located.

[0175] For the direct-cooling refrigerator 001 without a transparent area 201 on the door body 200, when the direct-cooling refrigerator 001 detects that the door body 200 is opened, it powers on the ambient light 370 of the air supply device 300, so that the user can visually understand that the fan 321 is rotating by observing the ambient light emitted by the ambient light 370.

[0176] For the direct-cooling refrigerator 001 with a transparent area 201 on the door body 200, the direct-cooling refrigerator 001 can keep the ambient light 370 powered on all the time.

[0177] Those skilled in the art can understand that this linkage form between the ambient light 370 and the fan 321 also enables the user to judge whether there is a fault in the air supply device 300 based on whether the ambient light 370 is lit or not.

[0178] So far, the technical solutions of the present utility model have been described in combination with multiple embodiments in the foregoing text. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is not limited to these specific embodiments. Without departing from the technical principle of the present utility model, those skilled in the art can split and combine the technical solutions in the above-mentioned various embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principle of the present utility model will fall within the protection scope of the present utility model.

[0179] Finally, it should be noted that the refrigerator of the present utility model is a refrigerator in a broad sense, which includes not only the commonly referred to refrigerator in a narrow sense, but also preservation devices with refrigeration and / or freezing functions, such as refrigerated cabinets, freezers, etc.

[0180] In the present utility model, the term "communicate" means fluid communication to allow fluids (such as air, liquid) to flow between two things that communicate with each other. And this "communication" can be such that the fluid flows between the two things that communicate with each other without leakage, or it can be such that the fluid flows between the two things that communicate with each other with a little leakage.

Claims

1. A direct cooling refrigerator for preventing frost, characterized in that: include: The box body defines at least one storage compartment, and a first quick-release structure is disposed on the top of at least one of the storage compartments; The air supply device is provided with a second quick-release structure matching the first quick-release structure, so that the air supply device can be installed on the box body through the second quick-release structure. The air supply device is used to drive the air flow in the storage room where it is located to prevent frost in the storage room.

2. The direct cooling refrigerator for preventing frost formation according to claim 1, characterized in that: The first quick-release structure and the second quick-release structure are plugged together in a plug-in manner.

3. The direct cooling refrigerator for preventing frost formation according to claim 2, characterized in that: One of the first quick-release structure and the second quick-release structure is configured as a columnar structure with an end cap, and the other of the first quick-release structure and the second quick-release structure is configured as a U-shaped structure. The columnar structure is embedded in the U-shaped structure and enables the end cap to stop the U-shaped structure in the vertical direction.

4. The direct cooling refrigerator for preventing frost formation according to claim 1, characterized in that: The first quick-release structure is arranged at the rear side of the top wall of the storage compartment, and the second quick-release structure is arranged at the rear top of the air supply device; The box body is provided with a first connection structure at the front side of the first quick-release structure, and the front part of the air supply device is provided with a second connection structure, so that the air supply device is fixed to the box body through the first connection structure and the second connection structure.

5. The direct cooling refrigerator for preventing frost formation according to claim 4, characterized in that: The first connection structure is a threaded hole, and the second connection structure is a through hole aligned with the threaded hole, so that a bolt or a screw passes through the through hole and is tightened with the threaded hole to fix the air supply device to the box body.

6. The direct cooling refrigerator for preventing frost formation according to any one of claims 1 to 5, characterized in that: The air supply device comprises a housing and a fan located in the housing. The top side of the shell is provided with an opening connected to the air inlet side of the fan, and the circumferential edge of the opening is in contact with or close to the top wall of the storage compartment, so that the negative pressure generated when the fan is working can suck the air supply device onto the top wall of the storage compartment or form an air cushion between the air supply device and the top wall of the storage compartment.

7. The direct cooling refrigerator for preventing frost formation according to claim 6, characterized in that: The housing defines a fan cavity and an air inlet cavity located on the top side of the fan cavity, and the opening is formed on the top side of the air inlet cavity; The air inlet of the air supply device is formed on the peripheral wall of the air inlet cavity, and the air outlet of the air supply device is formed on the area where the shell is connected to the fan cavity.

8. The direct cooling refrigerator for preventing frost formation according to claim 7, characterized in that: The fan is a centrifugal fan.

9. The direct cooling refrigerator for preventing frost formation according to any one of claims 1 to 5, characterized in that: The top wall of the storage compartment is provided with a sinking groove, and the air supply device is installed in the sinking groove.

10. The direct cooling refrigerator for preventing frost formation according to claim 9, characterized in that: The sink extends rearwardly to the rear side wall of the storage compartment; and / or, The sink is located in the middle of the storage compartment in the transverse direction; and / or, The depth of the front part of the sink gradually decreases from the back to the front, and the height of the front part of the air supply device gradually decreases from the back to the front.

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