Air port assembly, cabinet body assembly and refrigerator

Abstract

This application provides an air vent assembly, a cabinet assembly, and a refrigerator. The air vent assembly includes a mounting plate and an air guide plate. An air outlet is provided on the mounting plate. The air guide plate is fixed to one side of the mounting plate and forms an air inlet channel. The air inlet channel communicates with and smoothly transitions to the air outlet, and the air guide plate has an arc-shaped structure. At least two air guide plates are provided, arranged vertically to form at least two air inlet channels. Along the opening direction of the air inlet channel, the fluid area of ​​the upper air inlet channel is smaller than that of the lower air inlet channel. This application, through the arc-shaped air guide plate and the structural design of the smooth transition between the air inlet channel and the air outlet, optimizes the direction of cold air flow, allowing the cold air to smoothly transition to the air outlet, thereby significantly reducing the friction loss of the cold air flow and improving the utilization efficiency of the cold air. Furthermore, the larger fluid area of ​​the lower air inlet channel ensures sufficient air intake, improving the overall air delivery efficiency.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and in particular to an air vent assembly, a cabinet assembly, and a freezer. Background Technology

[0002] Currently, commercial upright refrigerators offer two cooling methods: air-cooled and direct-cooled. Compared to direct-cooled refrigerators, air-cooled refrigerators utilize forced convection heat exchange, offering advantages such as uniform temperature distribution and rapid cooling response. However, due to wind resistance and static pressure, the airflow distribution within the refrigerator is not linear.

[0003] After the fan starts, cold air is output to the freezer through the air duct, then exchanges heat with the beverages and air inside the freezer before returning to the fan. During this flow, the cold air incurs several losses, such as entropy increase due to the collision between the fan-output cold air and the air duct itself, friction loss along the flow path within the air duct, entropy increase due to the angle at which the air vents connect to the air duct deviates from the original airflow direction, and localized losses caused by the vent louvers, etc.

[0004] Therefore, it is necessary to design an air vent assembly, cabinet assembly, and freezer to solve the above-mentioned technical problems. Utility Model Content

[0005] This application provides an air vent assembly, a cabinet assembly, and a freezer, which can improve the utilization efficiency of cold air.

[0006] According to a first aspect of the embodiments of this specification, an air vent assembly is provided, which includes a mounting plate and an air guide plate; the mounting plate is provided with an air outlet; the air guide plate is fixed to one side of the mounting plate and forms an air inlet channel; the air inlet channel communicates with the air outlet and has a smooth transition, and the air guide plate has an arc-shaped structure.

[0007] Furthermore, the air inlet channel is an upward-opening arc-shaped structure; the air outlet has a bottom surface and a top surface that are arranged opposite to each other, the air guide plate smoothly transitions to the bottom surface, and the arc direction of the bottom surface is consistent with that of the air guide plate;

[0008] The number of air guide plates is at least two, and the at least two air guide plates are arranged vertically to form at least two air inlet channels respectively; along the opening direction of the air inlet channels, the fluid area of ​​the upper air inlet channel is smaller than the fluid area of ​​the lower air inlet channel.

[0009] Furthermore, the air inlet channel is an arc-shaped structure with an opening facing downwards; the air outlet has a bottom surface and a top surface that are arranged opposite to each other, the air guide plate smoothly transitions to the top surface, and the curvature of the top surface is consistent with the curvature direction of the air guide plate.

[0010] Furthermore, the air inlet channel has an air inlet, the air inlet is located on a first plane, the air outlet is located on a second plane, and the first plane is perpendicular to the second plane;

[0011] The first plane is perpendicular to the tangent at the highest point of the air guide plate.

[0012] Furthermore, it also includes multiple partitions, each partition comprising a first plate and a second plate connected to each other. The first plate is arranged at intervals within the air inlet channel, and the second plate protrudes from the air outlet to the other side of the mounting plate.

[0013] Furthermore, it also includes a baffle, which is arranged along the outer periphery of the second plate and forms multiple independent air outlet channels with the second plate;

[0014] The air outlet channel and the air inlet channel are connected through the air outlet.

[0015] According to a second aspect of the embodiments of this specification, a cabinet assembly is provided, which includes the air vent assembly, air duct assembly and cabinet as described in the first aspect; the air vent assembly is installed on the cabinet, and the air inlet channel is placed inside the air duct assembly so that cold air enters the cabinet through the air inlet channel inside the air duct assembly.

[0016] Furthermore, the cabinet includes multiple compartments, with adjacent compartments forming storage space, and the air vent assembly is installed on the inner wall of the storage space;

[0017] The cabinet also includes a return air vent and a supply air vent located on the upper layer. The opening of the air intake channel faces upward, and the gap between the air intake channel and the inner wall of the air duct assembly decreases sequentially from top to bottom; or

[0018] The cabinet also includes a return air vent and a supply air vent located in the middle layer. The air intake channel opens upwards from the lower layer to the middle layer, and the gap between the air intake channel and the inner wall of the air duct assembly increases sequentially from the lower layer to the middle layer. The air intake channel opens downwards from the middle layer to the lower layer, and the gap between the air intake channel and the inner wall of the air duct assembly decreases sequentially from the middle layer to the lower layer. Or

[0019] The cabinet also includes a return air vent and an air supply vent located on the lower layer. The air inlet channel opens downwards, and the gap between the air inlet channel and the inner wall of the air duct assembly increases sequentially from top to bottom.

[0020] Furthermore, the mounting plate is provided with a quick-release structure, and the mounting plate is detachably installed on the cabinet through the quick-release structure; the quick-release structure includes at least one of the following: a snap-fit ​​structure or a magnetic structure.

[0021] Furthermore, the cross-section of the air duct assembly is square, and there is an arc transition between adjacent sidewalls of the air duct assembly; and / or

[0022] The openings of the air duct assembly are arranged in a conical shape; and / or

[0023] An insulation layer is arranged on the inner wall of the air duct assembly, and there is an arc transition between two adjacent side walls of the insulation layer.

[0024] According to a third aspect of the embodiments of this specification, a freezer is provided, which includes the cabinet assembly described in the second aspect and a refrigeration device disposed within the cabinet assembly.

[0025] This application offers the following advantages: Through its arc-shaped air guide plate and the smooth transition between the air inlet and outlet, the design optimizes the direction of cold air flow, allowing the cold air to smoothly transition to the outlet. This significantly reduces friction loss and improves the efficiency of cold air utilization. Furthermore, the larger fluid area of ​​the lower air inlet ensures sufficient air intake, enhancing overall air delivery efficiency.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and do not limit this specification. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0028] Figure 1 This is a side view of an embodiment of the air vent assembly of this application;

[0029] Figure 2 This is a side view of another embodiment of the air vent component of this application;

[0030] Figure 3 This is a top view of the air vent component of this application;

[0031] Figure 4 This is a partial schematic diagram of the air vent component of this application;

[0032] Figure 5 This is a partial cross-sectional view of an air vent assembly in one embodiment of this application;

[0033] Figure 6 This is a partial cross-sectional view of the air vent assembly in another embodiment of this application;

[0034] Figure 7 This is a schematic diagram of the air outlet assembly assembled into the air duct assembly of this application;

[0035] Figure 8This is a structural diagram of the air vent assembly of this application to the cabinet;

[0036] Figure 9 This is a cross-sectional view of the air duct assembly of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100 - Air outlet assembly; 200 - Air duct assembly; 201 - Insulation layer; 300 - Cabinet body;

[0039] 10-Mounting plate; 11-Air outlet; 111-Bottom surface; 112-Top surface;

[0040] 20 - Air guide plate; 21 - Air inlet channel; 211 - Air inlet;

[0041] 30 - Partition; 31 - First plate; 32 - Second plate;

[0042] 40 - Baffle; 41 - Air outlet duct. Detailed Implementation

[0043] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0044] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0045] The embodiments described in this specification will now be described in detail.

[0046] Reference Figures 1-4 As shown, this application discloses an air vent assembly 100, which includes a mounting plate 10, an air guide plate 20, a partition plate 30, and a baffle plate 40. The mounting plate 10 is provided with an air outlet 11. The air guide plate 20 is fixed to one side of the mounting plate 10 and forms an air inlet channel 21. Cold air enters from the air inlet channel 21 and is blown out from the air outlet 11.

[0047] The mounting plate 10 has a square structure. The air outlet 11 also has a square structure and extends along the length of the mounting plate 10, so that cold air is blown out along the length of the mounting plate 10. In another embodiment, the mounting plate 10 and the air outlet 11 can also be trapezoidal, circular, or triangular, etc., and there is no specific limitation here.

[0048] The air guide plate 20 and the mounting plate 10 are integrally injection molded, eliminating the joint problems of bolts, welding or bonding in traditional assembly, reducing stress concentration points, and thus making the air outlet assembly 100 more resistant to impact and vibration when blown by cold air. At the same time, the complex structure can be produced with a single mold, reducing the manufacturing cost of the air outlet assembly 100.

[0049] The air guide plate 20 has an arc-shaped structure. The arc design can reduce the resistance when the cold air comes into contact with the air guide plate 20, making the cold air flow more smoothly when passing through the surface of the air guide plate 20, thereby reducing the noise generated by the collision between the cold air and the air guide plate 20 during the flow of cold air.

[0050] The air inlet channel 21 has an air inlet 211. The radial dimension of the air inlet 211 gradually decreases from the opening into the air inlet channel 21. In this way, the air inlet channel 21 can achieve a large amount of air intake while reducing its own size, that is, reducing the size of the air outlet assembly 100, making the air outlet assembly 100 more flexible to install.

[0051] Figure 1 The number of air guide plates 20 shown is two. The two air guide plates 20 are arranged vertically and form two air inlet channels 21 respectively. The mounting plate 10 is provided with two independent air outlets 11. Figure 2 The air guide plate 20 shown is provided, and the corresponding mounting plate 10 is provided with an air outlet 11. Cold air passes directly through the air inlet channel 21 formed by the air guide plate 20 and is blown out from the air outlet 11.

[0052] When two air guide plates 20 are used, along the opening direction of the air inlet channel 21, the fluid area of ​​the upper air inlet channel 21 is smaller than that of the lower air inlet channel 21. In one embodiment, the upper and lower air inlet channels 21 are of the same length and aligned, and the width of the upper air inlet channel 21 is smaller than that of the lower air inlet channel 21, thereby making the fluid area of ​​the upper air inlet channel 21 smaller than that of the lower air inlet channel 21. Here, the length direction refers to the height direction perpendicular to the mounting plate 10, the width direction is the longest distance from the air inlet 211 to the mounting plate 10, and the fluid area refers to the area of ​​the horizontal plane where the air inlet 211 is located.

[0053] In another embodiment, the length of the upper air inlet channel 21 is less than the width of the lower air inlet channel 21. The widths of the two air inlet channels 21 are the same and they are aligned, thereby making the fluid area of ​​the upper air inlet channel 21 smaller than that of the other air inlet channel 21. The widths of the upper and lower air inlet channels 21 can be adjusted in combination with the space where the air outlet assembly 100 is placed and the airflow of the upper and lower air inlet channels 21, and are not limited here.

[0054] In the two embodiments described above, the smaller fluid area of ​​the upper air inlet channel 21 can increase the airflow velocity in that area, creating a local negative pressure effect. This enhances the guiding effect on the lower air inlet channel 21, preventing airflow interference between upper and lower layers due to gravity or uneven pressure, thereby improving overall air delivery efficiency. Of course, the number of air guide plates 20 can also be set to three, four, etc.

[0055] In this embodiment, the air inlet 211 is located on the first plane, and the air outlet 11 is located on the second plane. The first plane is perpendicular to the second plane. The first plane is perpendicular to the tangent at the highest point of the air guide plate 20. In another embodiment, the first plane and the second plane may also form an obtuse or acute angle.

[0056] Specifically, in combination Figure 2 As shown, the angle between the direction of the air intake offset and the original flow direction of the cold air is defined as θ. It should be noted that the plane containing the intersection point a of the air intake offset direction and the original direction is perpendicular to the second plane and is located on the same plane as the end of the cold air that first contacts the air outlet 11.

[0057] The wind speed is highest when θ = 45°, and the wind speed is better when 90° ≥ θ ≥ 45° than when 45° ≥ θ ≥ 0°. For example, when θ = 45°, the wind speed at outlet 11 is 1.3 m / s; when θ = 90°, the wind speed at outlet 11 is 1.1 m / s; when θ = 0.3°, the wind speed at outlet 11 is 1.1 m / s; and when θ = 60°, the wind speed at outlet 11 is 1.2 m / s.

[0058] Considering that the direction of the cold air intake needs to be aligned with the air inlet 211, and that the direction of cold air intake can vary, the opening direction of the air inlet 211 also needs to be adjusted accordingly. Therefore, when the cold air blows in from top to bottom, refer to... Figure 5 As shown, the air inlet channel 21 is an upward-opening arc-shaped structure. The air outlet 11 has a bottom surface 111 and a top surface 112 that are arranged opposite to each other. The air guide plate 20 smoothly transitions to the bottom surface 111, and the arc direction of the bottom surface 111 and the air guide plate 20 is consistent. It should be noted that the smooth transition mentioned here refers to a rounded transition. In another embodiment, it can also be a smooth transition.

[0059] When cold air blows in from top to bottom, refer to Figure 6 As shown, the air inlet channel 21 is an arc-shaped structure with an opening facing downwards. The air outlet 11 has a bottom surface 111 and a top surface 112 that are arranged opposite to each other. The air guide plate 20 smoothly transitions to the top surface 112, and the curvature of the top surface 112 is consistent with the curvature direction of the air guide plate 20. It should be noted that the smooth transition mentioned here refers to a rounded transition. In another embodiment, it can also be a smooth transition.

[0060] Multiple partitions 30 are provided, each including a first plate 31 and a second plate 32 connected to each other. The first plates 31 are spaced apart within the air inlet channel 21 and are flush with the air inlet 211 of the air inlet channel 21, so as to divide the cold air into multiple directional paths, reduce turbulence interference, and ensure that the cold air is delivered efficiently in a preset direction. The partitions 30 are integrally formed with the mounting plate 10 and the air guide plate 20.

[0061] The second plate 32 protrudes from the air outlet 11 to the other side of the mounting plate 10, that is, the side away from the air guide plate 20. A baffle 40 is arranged along the outer periphery of the second plate 32 and forms multiple independent air outlet channels 41 with the second plate 32, and is flush with the air outlet of the air outlet channel 41. Cold air acts independently on different areas of the freezer through the multiple air outlet channels 41, providing cooling for different areas. The air outlet channel 41 and the air inlet channel 21 are connected through the air outlet 11. The baffle 40 is integrally formed with the mounting plate 10, the air guide plate 20, and the partition 30.

[0062] In this embodiment, since the upper and lower air inlet channels 21 are of the same length, only one partition 30 is provided between the upper and lower air inlet channels 21 in the vertical direction, thereby forming multiple independent air outlet channels 41 of the same size. In another embodiment, the upper and lower air inlet channels 21 can also be arranged with partitions 30 respectively, and the spacing between adjacent partitions 30 can be adjusted according to the size requirements of the air outlet 11.

[0063] It should be noted that the aforementioned air vent assembly 100 is used not only for guiding cold air, but also, in another embodiment, for guiding hot air, etc. The specific gas and its state guided by the air vent assembly 100 are not limited here.

[0064] Please refer to the reference again. Figures 7-9 As shown, this application also discloses a cabinet assembly, which includes an air vent assembly 100, an air duct assembly 200, and a cabinet 300. The air vent assembly 100 is installed on the cabinet 300, and the air inlet channel 21 is placed inside the air duct assembly 200 so that cold air enters the cabinet 300 through the air inlet channel 21 placed inside the air duct assembly 200, thereby reducing the wind speed loss and noise caused by the deflection of the cold air itself between the air duct assembly 200 and the air vent assembly 100.

[0065] The cross-section of the air duct assembly 200 is square, and the adjacent sidewalls of the air duct assembly 200 have an arc transition, thereby eliminating airflow separation at right angles, reducing local resistance, making the airflow distribution more uniform, and improving the conveying efficiency. In addition, the opening of the air duct assembly 200 is arranged in a conical shape, gradually decreasing in size from the opening inward, to accelerate the flow of cold air within the air duct assembly 200.

[0066] In this embodiment, an insulation layer 201 is arranged on the inner wall of the air duct assembly 200, and the adjacent two side walls of the insulation layer 201 have an arc transition. Through the design of the insulation layer 201, heat exchange between the inside and outside of the air duct assembly 200 can be effectively blocked, directly reducing the workload of the cabinet 300.

[0067] Furthermore, in order to reduce local resistance and accelerate the flow of cold air within the air duct assembly 200, the cross-section of the insulation layer 201 is also square, and the insulation layer 201 is also arranged in a conical shape at the opening of the air duct assembly 200.

[0068] Cabinet 300 includes a return air vent (not shown in the diagram) and a supply air vent (not shown in the diagram). For example... Figure 7 As shown, when the return air vent and the supply air vent are located on the upper layer of the cabinet 300, the opening of the air inlet channel 21 faces upward, and the gap between the air inlet channel 21 and the inner wall of the air duct assembly 200 decreases from top to bottom. The lowest layer of the air outlet assembly 100 is attached to the inner wall of the air duct assembly 200, and a bend is added between them to reduce air resistance, while allowing cold air to be introduced into the air outlet assembly 100 as much as possible.

[0069] When the return air vent and the supply air vent are located in the middle layer of the cabinet 300, the air intake duct 21 opens upwards from the bottom layer to the middle layer, and the gap between the air intake duct 21 and the inner wall of the air duct assembly 200 increases sequentially from the bottom layer to the middle layer. When the air intake duct 21 opens downwards from the middle layer to the bottom layer, the gap between the air intake duct 21 and the inner wall of the air duct assembly 200 decreases sequentially from the middle layer to the bottom layer.

[0070] When the return air vent and the supply air vent are located on the lower layer of the cabinet 300, the opening of the air inlet channel 21 faces downwards, and the gap between the air inlet channel 21 and the inner wall of the air duct assembly 200 increases sequentially from top to bottom. The uppermost air outlet assembly 100 is attached to the inner wall of the air duct assembly 200, and a bend is added between them to reduce air resistance, while allowing as much cold air as possible to be directed into the air outlet assembly 100.

[0071] Since the return air and supply air positions in the cabinet 300 are fixed, but the cooling capacity required by each layer in the cabinet 300 is not the same, it is necessary to adjust the fluid area of ​​the air inlet channel 21 of each layer to ensure that each layer of the cabinet 300 can be cooled evenly.

[0072] Specifically, the sum of the supply air distance and the return air distance is used as the denominator, i.e., the distance along which cold air flows in from the duct assembly 200, passes through the air outlet assembly 100, enters the cabinet 300, and finally flows into the return air outlet. The air volume is used as the numerator, and the resulting value is used as the standard for the cooling capacity obtained by each floor load. Therefore, this application adjusts the width of the air inlet channel 21 according to the different positions of the return air outlet and the air outlet, ensuring that the fluid area of ​​the air inlet channel 21 is positively correlated with the distance along the air inlet channel, so that each floor load obtains the same cooling capacity.

[0073] The mounting plate 10 is equipped with a quick-release structure, allowing it to be detachably mounted on the cabinet 300. This means that when the air vent assembly 100 needs cleaning or replacement, compared to molding the air vent assembly 100 onto the cabinet 300, the separately detachable air vent assembly 100 eliminates the need to shut down the cabinet 300 for maintenance, making the process simple and quick. Furthermore, considering that the cabinet 300 is typically made of steel, directly molding the air vent assembly 100 onto it would be costly. In this embodiment, the air vent assembly 100 is made of plastic, resulting in lower costs.

[0074] The quick-release structure includes at least one of the following: a snap-fit ​​structure or a magnetic structure. In this embodiment, the quick-release structure is a snap-fit ​​structure, and the mounting plate 10 has an elastic locking block on the side where the air guide plate 20 is located. When the air outlet assembly 100 is installed, the elastic locking block is compressed by the reserved hole on the cabinet 300. After passing through the reserved hole, the elastic locking block rebounds and locks into the cabinet 300.

[0075] To reduce interference between the quick-release structure and the air inlet duct 21, the snap-fit ​​or magnetic structure is arranged along the outer ring of the mounting plate 10. Furthermore, to ensure installation stability, the quick-release structure can be arranged symmetrically about the center of the mounting plate 10.

[0076] In some embodiments, to ensure the accuracy of the installation position of the mounting plate 10 and the cabinet 300, the mounting plate also includes a guide structure. For example, the mounting plate 10 has a raised groove, and the cabinet 300 has a corresponding protrusion that matches the groove. The quick-release structure and the guide structure are integrally formed with the mounting plate 10.

[0077] The cabinet 300 also includes multiple compartments, with adjacent compartments forming storage spaces. One or more air vent components 100 are installed on the inner walls of the storage spaces. The inner walls referred to here can be the two side walls or the rear wall of the cabinet.

[0078] This application improves the cooling effect of a storage space by arranging multiple air vent assemblies 100 within the storage space. The multiple air vent assemblies 100 within each storage space can be arranged sequentially at intervals along a horizontal and / or vertical direction.

[0079] This application optimizes the direction of cold air flow by adding an air outlet assembly 100 between the air duct assembly 200 and the cabinet 300, and by utilizing the arc-shaped air guide plate 20 of the air outlet assembly 100 and the smooth transition between the air inlet channel 21 and the air outlet 11. This allows the cold air to smoothly transition from the air duct assembly 200 to the air outlet 11 and finally enter the cabinet 300 to cool the beverages inside. This significantly reduces the friction loss of the cold air flow and improves the utilization efficiency of the cold air.

[0080] This application also discloses a freezer, which includes a cabinet assembly 300 and a refrigeration device (not shown in the figure) placed inside the cabinet assembly 300. The refrigeration device is used to input cold air into the air supply vent and also to draw in air from the return air vent, convert it, and then output it from the air supply vent, forming a virtuous cycle.

[0081] The refrigeration unit includes a compressor, condenser, expansion valve, and evaporator. When the freezer is running, the compressor outputs high-temperature, high-pressure gaseous refrigerant, which is delivered to the condenser. The condenser condenses the high-temperature, high-pressure gaseous refrigerant into medium-temperature, high-pressure refrigerant. This medium-temperature, high-pressure refrigerant then undergoes expansion and throttling through the expansion valve, further reducing its pressure and temperature, and flows out as a low-temperature, low-pressure liquid refrigerant to the evaporator. The low-temperature, low-pressure liquid refrigerant evaporates into gaseous refrigerant in the evaporator, and then passes through the air duct assembly 200 and the air outlet assembly 100 before entering the cabinet 300. During evaporation, the refrigerant absorbs a large amount of heat from the cabinet 300, thereby lowering the temperature inside the cabinet 300 and facilitating the refrigeration of items within it. The refrigerant exiting the evaporator replenishes the compressor, forming a refrigerant loop. Thus, the refrigerant continuously circulates in the refrigerant loop to maintain the refrigerated environment of the cabinet 300.

[0082] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A tuyere assembly, characterized by, It includes a mounting plate and an air guide plate; the mounting plate is provided with an air outlet; the air guide plate is fixed to one side of the mounting plate and forms an air inlet channel; the air inlet channel is connected to the air outlet and has a smooth transition, and the air guide plate has an arc-shaped structure; The number of air guide plates is at least two, and the at least two air guide plates are arranged vertically to form at least two air inlet channels respectively; along the opening direction of the air inlet channels, the fluid area of ​​the upper air inlet channel is smaller than the fluid area of ​​the lower air inlet channel.

2. The air vent assembly according to claim 1, characterized in that, The air inlet channel is an upward-opening arc-shaped structure; the air outlet has a bottom surface and a top surface that are arranged opposite to each other, the air guide plate smoothly transitions to the bottom surface, and the arc direction of the bottom surface is consistent with that of the air guide plate.

3. The air vent assembly according to claim 1, characterized in that, The air inlet channel is an arc-shaped structure with an opening facing downwards; the air outlet has a bottom surface and a top surface that are arranged opposite to each other, the air guide plate smoothly transitions to the top surface, and the curvature of the top surface is consistent with the curvature direction of the air guide plate.

4. The air vent assembly according to claim 2 or 3, characterized in that, The air intake channel has an air inlet, the air inlet is located on a first plane, the air outlet is located on a second plane, and the first plane is perpendicular to the second plane; The first plane is perpendicular to the tangent at the highest point of the air guide plate.

5. The air vent assembly according to claim 2 or 3, characterized in that, It also includes multiple partitions, each partition comprising a first plate and a second plate that are connected to each other. The first plate is arranged at intervals within the air inlet channel, and the second plate protrudes from the air outlet to the other side of the mounting plate.

6. The air vent assembly according to claim 5, characterized in that, It also includes a baffle, which is arranged along the outer periphery of the second plate and forms multiple independent air outlet channels with the second plate; The air outlet channel and the air inlet channel are connected through the air outlet.

7. A cabinet assembly characterized by, It includes the air vent assembly, air duct assembly, and cabinet as described in any one of claims 1-6; the air vent assembly is installed on the cabinet, and the air inlet channel is placed inside the air duct assembly so that cold air enters the cabinet through the air inlet channel within the air duct assembly.

8. The cabinet assembly according to claim 7, characterized in that, The cabinet includes multiple compartments, with adjacent compartments forming storage space, and the air vent assembly is installed on the inner wall of the storage space; The cabinet also includes a return air vent and a supply air vent located on the upper layer. The opening of the air intake channel faces upward, and the gap between the air intake channel and the inner wall of the air duct assembly decreases sequentially from top to bottom; or The cabinet also includes a return air vent and a supply air vent located in the middle layer. The air intake channel opens upwards from the lower layer to the middle layer, and the gap between the air intake channel and the inner wall of the air duct assembly increases sequentially from the lower layer to the middle layer. The air intake channel opens downwards from the middle layer to the lower layer, and the gap between the air intake channel and the inner wall of the air duct assembly decreases sequentially from the middle layer to the lower layer. Or The cabinet also includes a return air vent and an air supply vent located on the lower layer. The air inlet channel opens downwards, and the gap between the air inlet channel and the inner wall of the air duct assembly increases sequentially from top to bottom.

9. The cabinet assembly according to claim 7, characterized in that, The mounting plate is provided with a quick-release structure, and the mounting plate can be detachably installed on the cabinet through the quick-release structure; the quick-release structure includes at least one of the following: a snap-fit ​​structure or a magnetic structure.

10. The cabinet assembly according to claim 7, characterized in that, The cross-section of the air duct assembly is square, and there is an arc transition between adjacent sidewalls of the air duct assembly; and / or The openings of the air duct assembly are arranged in a conical shape; and / or An insulation layer is arranged on the inner wall of the air duct assembly, and there is an arc transition between two adjacent side walls of the insulation layer.

11. A freezer, comprising a cabinet assembly according to any one of claims 7-10 and a refrigeration device disposed within the cabinet assembly.

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