Refrigeration duct and wine cabinet with humidity regulation function

Abstract

The present invention discloses a refrigeration duct and a wine cabinet with a humidity regulating function. The refrigeration duct includes an air duct back plate and a guide plate arranged on the air duct back plate. A water collecting device is arranged below the guide plate. A humidifying fan and a refrigerating fan are arranged in the refrigerating duct. The humidifying fan and the refrigerating fan are respectively located on both sides of the water collecting device. The air outlet of the humidifying fan faces the water collecting device, and the air outlet of the refrigerating fan is connected to the refrigerating chamber. In the refrigerating duct of the present invention, the water collecting device collects condensed water on one side to prevent the condensed water from dripping on electrical components such as the refrigerating fan and causing the service life to be damaged. The humidifying fan and the refrigerating fan are respectively arranged on both sides of the water collecting device. When the humidity in the refrigerator is low, the humidifying fan is controlled to operate, and the wind is radially blown to the water collecting device. The condensed water on the water collecting device is dissipated, and the moisture is sent to the refrigerating fan. The refrigerating fan operates to blow air with higher humidity into the refrigerator to achieve the humidification function.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a refrigeration air duct and a wine cabinet with humidity regulating function. Background Art

[0002] Traditional refrigeration ducts usually use refrigeration fans for cold air circulation, and inevitably frost and condensation will form on the back of the refrigeration duct. When the melted water drips on the refrigeration fan, it will cause rust and short circuit of the refrigeration fan parts, shortening the service life of the refrigeration fan.

[0003] The humidity in traditional wine cabinets fluctuates too much and cannot be adjusted dynamically. Dynamic humidity adjustment can be achieved through the cooperation of the humidification fan and the refrigeration fan, as well as the frosting and dehumidification of the frosting plate. Summary of the invention

[0004] In order to solve the technical problems that the humidity of existing wine cabinet products cannot be dynamically adjusted, the condensed water gathered in the refrigeration duct is easy to drip onto the refrigeration fan, and the refrigeration duct has a single function, the present invention proposes a condensed water diversion device and a humidification and dehumidification system in which a humidification fan and a frosting plate cooperate to solve the above problems.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0006] A refrigeration duct and wine cabinet with humidity regulation function, comprising an air duct back plate and a guide plate arranged on the air duct back plate, a water collecting device is arranged under the guide plate, a humidifying fan and a refrigerating fan are arranged in the refrigeration duct, the humidifying fan and the refrigerating fan are respectively located on both sides of the water collecting device, the air outlet of the humidifying fan is directed toward the water collecting device, and the air outlet of the refrigerating fan is connected to the refrigerating chamber.

[0007] Furthermore, a frosting plate is arranged above the water collecting device, and the frosting plate is adjacent to the evaporator.

[0008] Furthermore, the frosting plate is a plate-like structure that is wide at the top and narrow at the bottom, and the lower end of the frosting plate has a confluence tip formed by connecting two end edges, and the confluence tip faces the water collecting device.

[0009] Furthermore, a water retaining flange is formed on the end edge.

[0010] Furthermore, a plurality of water retaining strips are formed on the frosting plate, and the water retaining strips are arranged obliquely in two rows, and the end of the water retaining strip close to the central axis of the frosting plate is low, and the end away from the central axis of the frosting plate is high.

[0011] Furthermore, the water collection device includes a main body, one of the two ends of the main body is a hemispherical surface, and the other end surface is a conical surface. The outer surface of the hemispherical surface is formed with a plurality of steps at intervals along its latitude direction. The central axis of the main body is arranged in the vertical direction and passes through the diversion outlet at the top of the water collection device. The rear part of the water collection device is connected to the driving device, and the driving device is used to drive the water collection device to flip 180°.

[0012] Furthermore, the outer side of the step has a first water retaining edge protruding toward the top of the hemispherical surface, which is used to store moisture and increase the contact area between the radial air outlet of the humidification fan and water.

[0013] Furthermore, a through hole is opened at the center of the main body along its central axis, and the through hole has a first end located at the hemispherical surface and a second end located at the conical surface. A sealing structure is connected to the first end of the through hole through a flexible connection structure. When the main body is rotated to the point where the hemispherical surface is located above, the sealing structure seals the first end of the through hole, so that condensed water flows into the water retaining edge. When the main body is rotated to the point where the conical surface is located above, the sealing structure is detached from the first end and suspended below the first end, so that condensed water flows out of the through hole when the humidity is high.

[0014] Furthermore, the sealing structure is a sphere with a diameter no less than the caliber of the first end.

[0015] Alternatively, the water collecting device comprises a main body, and the main body is in a frustum shape.

[0016] The present invention also provides a wine cabinet, comprising any of the refrigeration air ducts described above.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are as follows: the refrigerated air duct with humidity regulation function of the present invention, on the one hand, converges condensed water through the guide plate and guides it to the water collecting device, which collects and stores it, to prevent condensed water from dripping on electrical components such as the refrigeration fan and causing life damage. A humidifying fan and a refrigeration fan are respectively arranged on both sides of the water collecting device. When the humidity in the refrigerator is low, the humidifying fan is controlled to operate and radially blow wind to the water collecting device. The condensed water on the water collecting device dissipates and the moisture is sent to the refrigeration fan. The refrigeration fan operates to blow air with higher humidity axially into the refrigerator to achieve the humidification function.

[0018] Other features and advantages of the present invention will become more apparent after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the refrigeration air duct proposed by the present invention;

[0021] Figure 2 yes Figure 1 A magnified view of part A;

[0022] Figure 3 yes Figure 2 Schematic diagram of the structure of the water collection device;

[0023] Figure 4 This is a schematic diagram of another state of an embodiment of the refrigeration air duct proposed by the present invention;

[0024] Figure 5 yes Figure 4 A magnified view of part B in FIG.

[0025] Figure 6 yes Figure 1 Schematic diagram of the back structure of the middle frosting plate;

[0026] Figure 7 It is another structural schematic diagram of the water collecting device in the refrigeration air duct proposed by the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1: This embodiment proposes a refrigeration air duct with humidity adjustment function, such as Figure 1-Figure 5As shown, it includes an air duct back plate 11 and a guide plate 12 arranged on the air duct back plate 11, a water collecting device 13 is arranged under the guide plate 12, a humidifying fan 14 and a refrigerating fan 15 are arranged in the refrigerating air duct, the humidifying fan 14 and the refrigerating fan 15 are respectively located on both sides of the water collecting device 13, the air outlet direction of the humidifying fan 14 is toward the water collecting device 13, and the air outlet direction of the refrigerating fan 15 is connected to the refrigerating chamber of the refrigerator. The guide plate 12 is used to catch the condensed water droplets that drip or flow down the air duct back plate 11, and converge on the guide plate 12, flow along the guide direction of the guide plate 12, and flow out at the guide outlet. The water collecting device 13 is located below the guide outlet. The condensed water flowing out from the guide outlet drips downward under the action of gravity and drips onto the water collecting device 13. The water collecting device 13 can collect the condensed water and has a certain water storage capacity, which can prevent the condensed water from dripping onto the condensing fan or other electrical appliances and pipelines located in the cold storage room, thereby avoiding damage to the condensing fan and other electrical appliances. When the humidity in the refrigerator compartment of the freezer is low, the humidifying fan 14 is turned on. Since the air outlet of the humidifying fan 14 is directed toward the water collecting device 13, and the humidifying fan 14 and the refrigerating fan 15 are respectively located on both sides of the water collecting device 13, the humidifying fan 14 is turned on to accelerate the volatilization of the condensed water collected by the water collecting device 13, and blows the high-humidity airflow toward the refrigerating fan 15. At the same time, the refrigerating fan 15 is turned on. Since the air outlet of the refrigerating fan 15 is connected with the refrigerating compartment of the freezer, the refrigerating fan 15 blows the high-humidity airflow into the refrigerating compartment, thereby humidifying the refrigerating compartment.

[0029] During the refrigeration process of the wine cabinet, the evaporator works, the compressor drives the refrigerant to circulate, the refrigerant absorbs heat in the evaporator and is used to provide cold air to the refrigerated room. The evaporator can be arranged in the refrigerated air duct or outside the refrigerated air duct, and the cold air generated by the evaporator is blown into the refrigerated room by the refrigerated fan 15. Figure 1 As shown, a frosting plate 16 is preferably provided above the water collecting device 13. The frosting plate 16 is adjacent to the evaporator (not shown in the figure due to angle reasons). The two may be in direct contact, or there may be a gap or a barrier between them. When the humidity in the refrigeration duct is high, the temperature of the cold amount transferred from the evaporator to the frosting plate 16 is low, so the water molecules in the air of the refrigeration duct are condensed into frost. A heating wire 17 is provided on the frosting plate 16, and then the heating wire 17 is controlled to work, so that the frost on the frosting plate 16 is melted and flows to the water collecting device 13, flows out from the internal through hole of the water collecting device 13 and is discharged from the box through the drain pipe, so as to achieve the effect of dehumidifying the refrigeration duct.

[0030] like Figure 6As shown, the back side of the frosting plate 16 is connected to the air duct back plate 11 through a first connecting shaft 161, and the end of the first connecting shaft 161 has a cylinder 162 axially perpendicular to the first connecting shaft 161, and the frosting plate 16 can rotate around the cylinder 162. The back side of the frosting plate 16 is located at the upper end of the first connecting shaft 161 and is provided with a heat conducting plate 165, and a moving magnet 163 is provided below the first connecting shaft 161. The moving magnet 163 is connected to the motor through a rotating shaft 164, and the motor is fixed on the air duct back plate 11, and is used to drive the moving magnet 163 to rotate on a vertical plane. The first connecting shaft 161 is a permanent magnet, and the first connecting shaft 161 is fixed on the frosting plate 16. When the air humidity in the refrigerated air duct is low, the moving magnet is controlled to rotate so that it faces the magnetic pole of the first connecting shaft 161 and is aligned with the magnetic pole of the first connecting shaft 161. The lower surface polarities of the first connecting shaft 161 are attracted, and the moving magnet 163 attracts the first connecting shaft 161, thereby driving the frosting plate 16 to rotate around the cylinder 162, and the heat conductive sheet 165 is away from the evaporator, thereby disconnecting the frosting plate 16 from the evaporator, and the evaporator does not transfer cold to the frosting plate 16, and thus the frosting plate does not frost or frosts less. On the contrary, when the air humidity in the refrigerated air duct is high, the moving magnet is controlled to rotate so that its magnetic end facing the first connecting shaft 161 repels the polarity of the lower surface of the first connecting shaft 161, and the moving magnet 163 attracts the first connecting shaft 161, thereby driving the frosting plate 16 to rotate around the cylinder 162, and the heat conductive sheet 165 is close to the evaporator and contacts with the evaporator, and the evaporator transfers cold to the frosting plate 16 through the heat conductive sheet 165, and a large amount of frost can be formed to remove moisture from the air.

[0031] As a preferred embodiment, Figure 2 As shown, the frosting plate 16 is a plate-shaped structure that is wide at the top and narrow at the bottom, which can increase the contact area between the frosting plate 16 and the air and improve the frosting ability. The lower end of the frosting plate 16 has a confluence tip 161 formed by connecting two end edges, and the confluence tip 161 faces the water collecting device 13. The confluence tip 161 guides the melted frosted water to the water collecting device 13 to prevent the defrosted water from dripping on the condensing fan or other electrical appliances and pipelines to cause damage to such devices.

[0032] Water retaining flanges 161a are formed on the ends of both sides of the converging tip 161 to prevent defrosting water from overflowing from both sides.

[0033] A plurality of water retaining strips 162 are formed on the frosting plate 16, and the water retaining strips 162 are arranged obliquely in two rows, and the end of the water retaining strip 162 close to the central axis of the frosting plate 16 is low, and the end away from the central axis of the frosting plate 16 is high. The water retaining strip 162 gathers the defrosting water toward the center, and the diversion outlet faces the confluence tip 161, so that the defrosting water can fall to the water collecting device 13 more accurately.

[0034] As a preferred embodiment, Figure 3As shown, the water collecting device 13 includes a main body, one of the two ends of the main body is a hemispherical surface 131, and the other end is a conical surface 132. The outer surface of the hemispherical surface 131 is formed with a plurality of steps 1311 at intervals along its latitude direction. The central axis of the main body is arranged in the vertical direction, and the central axis passes through the diversion outlet at the top of the water collecting device. The rear part of the water collecting device 13 is connected to a driving device (not shown in the figure due to angle reasons), and the driving device is used to drive the water collecting device to flip 180°, and is used to control the hemispherical surface 131 to face upward and the conical surface 132 to face downward, or the conical surface 132 to face upward and the hemispherical surface 131 to face downward. The working principle of the condensate diversion device is: the guide plate 12 is used to catch the condensate drops that drip or flow down the air duct back plate 11, and converge on the guide plate, flow along the diversion direction of the guide plate 12, and flow out at the diversion outlet. The water collecting device 13 is located below the diversion outlet. The condensate flowing out from the diversion outlet drips downward under the action of gravity and drips onto the water collecting device 13. The water collecting device 13 plays a further diversion role. Since the guide plate 12 and the water collecting device 13 transition in the upper and lower directions in space, they respectively play the role of diverting condensate at different heights.

[0035] like Figure 1 , Figure 2 As shown, when the driving device drives the hemispherical surface 131 to face upward and the conical surface 132 to face downward, the step surface of the step 1311 faces upward. Since the plurality of steps 1311 are formed on the outer surface of the hemisphere, the plurality of steps 1311 are arranged at a certain gradient. The condensed water flowing out from the position of the diversion outlet first drips on the top of the hemispherical surface, and then overflows to each step surface in sequence as the condensed water accumulates. Each step surface has a certain capacity to hold condensed water. The condensed water overflows to the lower step surface after exceeding the capacity of the step surface of the upper step surface. A step surface, so the condensed water needs to gradually overflow from the highest step to the lowest step and then flow down one step. The whole process takes a certain amount of time, which can extend the residence time of the condensed water in the diversion process of the water collecting device 13. The height of the water collecting device 13 is set to be equivalent to the height of the humidifying fan, and is located on one side of the humidifying fan. Therefore, when the humidifying fan is working, it can accelerate the evaporation of the condensed water on each step 1311, and enter the refrigerating chamber with the axial flow of the air driven by the refrigerating fan, so as to humidify the refrigerating chamber. When the condensed water on the bottom step continues to flow downward, it is located at the transition position between the hemispherical surface 131 and the conical surface 132. Since the conical surface 132 is below the step, and the tip of the cone is facing downward, the condensed water overflowing from the bottom step surface gradually flows along the conical surface 132 to the tip of the cone, and drips down from the tip of the cone. The whole process will not splash onto the condensing fan or other electrical appliances.

[0036] The refrigeration air duct of the present embodiment converges and guides the condensed water to the water collecting device through the guide plate, and is collected by the water collecting device. The water collecting device includes two end surfaces of a hemispherical surface and a conical surface, and can rotate 180° on the vertical plane. When the hemispherical surface is located at the top, the condensed water guided down from the guide plate is received and stored by the steps on the hemispherical surface, and is used to enter the cold storage room with the refrigeration fan for humidification after evaporation. The other end surface is set as a conical surface. If too much condensed water overflows from the step surface, the conical surface located below plays a role of guiding the flow, and finally the overflowed condensed water drops on the position below the cone tip. The drain outlet of the refrigerator can be set at this position, so that the condensed water can be discharged outside the cabinet body, which can effectively prevent the condensed water from dripping on the refrigeration fan, thereby avoiding damage to the refrigeration fan.

[0037] When there is no need to humidify the refrigerator compartment, the humidification fan does not run. Figure 4 , Figure 5 As shown, the driving device drives the hemispherical surface 131 downward and the conical surface 132 upward. The smoothly inclined conical surface 132 quickly guides the condensed water downward so that it drips on the drain outlet of the refrigerator below, shortening the time for the condensed water to flow on the water collection device 13 and reducing the evaporation of water into the refrigeration air duct.

[0038] In order to further increase the capacity of the step surface of the step 1311 to accommodate condensed water, it is preferred that the outer side of the step 1311 has a first water retaining edge protruding toward the top of the hemispherical surface, that is, when the driving device drives the hemispherical surface 131 upward, the first water retaining edge is arranged upward, and the first water retaining edge cooperates with the step surface to form an annular water storage tank to increase the water storage space, which can further extend the time that the condensed water stays on the water collection device 13. The first water retaining edge can store water and increase the contact area between the radial air outlet of the humidifying fan and the water.

[0039] When the driving device drives and controls the hemispherical surface 131 to face downward and the conical surface 132 to face upward, if the condensed water is diverted downward from the outer surface of the conical surface 132, it will still come into contact with the air in the refrigerated air duct and may evaporate into the refrigerated air duct. Therefore, in this embodiment, a through hole 133 is preferably opened in the center of the main body along its central axis. The through hole 133 has a first end 1312 located on the hemispherical surface 131 and a second end 1321 located on the conical surface 132. The outside of the first end 1312 of the through hole 133 is connected to a sealing structure 134 through a flexible connection structure. When the main body rotates until the hemispherical surface 131 is located at the top, the first end 1312 of the through hole 133 faces upward, and the sealing structure 134 can block the first end 1312 of the through hole. Therefore, the condensed water can flow downward along the sealing structure until the steps are filled. The surface, that is, the through hole does not affect the humidification need and can meet the humidification demand. When the main body rotates to the point where the conical surface 132 is located at the top, the first end 1312 of the through hole 133 faces downward, and under the action of gravity, the sealing structure 134 is separated from the first end 1312 and suspended below the first end 1312. The first end 1312 is opened downward. At this time, the second end 1321 faces upward, and the condensed water guided down from the guide plate enters the second end 1321, and then enters the through hole 133, and flows out from the first end 1312, and then drips into the drain at the bottom of the wine cabinet. Therefore, in this state, the condensed water is guided from the internal through hole of the water collecting device 13, which reduces the contact with the air in the refrigeration duct during flow, especially near the refrigeration fan. Since the air flows fast here, the volatilization of condensed water into the refrigeration duct is reduced.

[0040] The sealing structure 134 is connected to the first end 1312 of the through hole through a flexible connection structure, which can ensure that when the first end 1312 of the through hole is facing upward, the sealing structure 134 descends under its own weight to block the first end 1312. Preferably, the first end 1312 has a recessed portion matching the sealing structure 134, and the sealing structure 134 can fit into the recessed portion to block and seal the first end 1312. The flexible structure can be a rope, a silk thread, etc. made of flexible materials such as nylon, plastic, or rubber, and is certainly not limited to the above materials. Any material that can achieve the connection of the sealing structure 134 and does not affect the movement of the sealing structure 134 belongs to the protection scope of the present invention.

[0041] Since the sealing structure 134 is used to seal the first port, in order to improve the sealing performance during closure, the sealing structure 134 is preferably a sphere, and the recessed portion of the first end 1312 is a concave spherical surface structure. The spherical sealing structure 134 can fit tightly with the recessed portion of the concave spherical surface to tightly seal the sealing structure 134 around. In order to prevent the sealing structure 134 from being stuck in the first port and causing the first port to be unable to detach from the first port when facing downward, the diameter of the sealing structure 134 is preferably not less than the caliber of the first end 1312.

[0042] For a wine cabinet, the refrigeration air duct generally extends a certain distance in the vertical direction and has a high height. In order to be able to receive condensed water dripping from all directions, there are multiple guide plates 12, which are staggered and arranged in a vertical direction. Figure 1 As shown, the guide plates 12 are divided into two rows, which are arranged in the vertical direction respectively. The left end edge of the guide plates in the left row extends to the left end edge of the duct back plate 11, and the right end edge of the guide plates in the right row extends to the right end edge of the duct back plate 11. The projections of the ends of the two rows of guide plates that are close to each other in the vertical direction at least partially overlap, and the two end edges of the two rows of guide plates, the end close to the middle of the duct back plate 11 is low, and the end away from the middle of the refrigeration duct back plate is high. Therefore, after the guide plates receive the condensed water, it guides it from both sides of the refrigeration duct back plate to the middle position thereof, and the guide plates located at the bottom can receive the water guided down by the guide plates located at the top, so that the condensed water flows regularly and orderly.

[0043] The confluence tip 161 is disposed toward the through hole. When the conical surface 132 faces upward, the confluence tip 161 is aligned with the second end 1321 , and the flowing water enters the through hole through the second end 1321 and is then discharged through the through hole.

[0044] The guide plate 12 protrudes from the back plate of the refrigeration air duct and is located above the humidification fan and the refrigeration fan, so as to shield the humidification fan 14 and the refrigeration fan 15, and prevent the condensation water dripping from the top of the refrigeration fan 15 from dripping vertically onto the refrigeration fan 15. The condensation water droplets accumulated on the guide plate 12 are also easy to overflow. In order to prevent overflow, the outer end edge of the guide plate 12 also has a second water retaining edge folded upward to prevent the condensation water from overflowing from the edge of the guide plate 12 when the guide plate 12 flows in the guide direction.

[0045] In this embodiment, the driving device can be implemented by a stepper motor, which should be fixed on the back plate of the refrigeration duct, and the power output shaft is perpendicular to the duct back plate 11. The power output shaft drives the body of the water collection device 13 to rotate 180° on the vertical plane to switch the diversion humidification mode or the diversion mode only.

[0046] Alternatively, in addition to the above structure, the water collecting device 13 may also have a body as follows: Figure 7 As shown in the frustum, a water-absorbing layer 135 can also be provided on the steps of the frustum-shaped body. The water-absorbing layer can be made of a material with water-absorbing function such as a sponge to absorb water dripping on the water accumulation device, further increase the contact area of ​​condensed water, and improve the humidification effect.

[0047] Embodiment 2: This embodiment proposes a wine cabinet, which includes the refrigeration air duct in Embodiment 1. For details, please refer to the description in Embodiment 1, which will not be repeated here.

[0048] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A refrigeration air duct with humidity adjustment function, characterized in that: It includes an air duct back plate and a guide plate arranged on the air duct back plate, a water collecting device is arranged under the guide plate, a humidifying fan and a refrigerating fan are arranged in the refrigerating air duct, the humidifying fan and the refrigerating fan are respectively located on both sides of the water collecting device, the air outlet of the humidifying fan is directed toward the water collecting device, and the air outlet of the refrigerating fan is connected to the refrigerating chamber; The water collecting device comprises a body, one of the two ends of the body is a hemispherical surface, the outer surface of the hemispherical surface is formed with a plurality of steps at intervals along its latitude direction, and the other end surface of the body is a conical surface. The rear part of the water collecting device is connected to a driving device, and the driving device is used to drive the water collecting device to flip 180 degrees; When the driving device drives the hemispherical surface of the water collecting device to be located upward, the condensed water guided down from the guide plate is received and stored by the steps on the hemispherical surface, and is used to enter the cold storage room with the refrigeration fan for humidification after evaporation; When humidification of the refrigerating chamber is not required, the driving device drives the hemispherical surface downward and the conical surface upward.

2. The refrigeration air duct according to claim 1, characterized in that: A frosting plate is arranged above the water collecting device, and the frosting plate is adjacent to the evaporator.

3. The refrigeration air duct according to claim 2, characterized in that: The frosting plate is a plate-shaped structure that is wide at the top and narrow at the bottom. The lower end of the frosting plate has a confluence tip formed by connecting two end edges, and the confluence tip faces the water collecting device.

4. The refrigeration air duct according to claim 3, characterized in that: A water retaining flange is protruded on the end edge.

5. The refrigeration air duct according to claim 2, characterized in that: A plurality of water retaining strips are formed on the frosting plate. The water retaining strips are arranged obliquely in two rows. The end of the water retaining strip close to the central axis of the frosting plate is low, and the end away from the central axis of the frosting plate is high.

6. The refrigeration air duct according to any one of claims 1 to 5, characterized in that: The central axis of the body is arranged along the vertical direction and passes through the diversion outlet at the top of the water collecting device.

7. The refrigeration air duct according to claim 6, characterized in that: The outer side of the step has a first water retaining edge protruding toward the top of the hemispherical surface, which is used to store moisture and increase the contact area between the radial air outlet of the humidifying fan and water.

8. The refrigeration air duct according to claim 6, characterized in that: A through hole is opened at the center of the body along its central axis, and the through hole has a first end located at the hemispherical surface and a second end located at the conical surface. A sealing structure is connected to the first end of the through hole through a flexible connection structure. When the body is rotated to the point where the hemispherical surface is located above, the sealing structure blocks the first end of the through hole. When the body is rotated to the point where the conical surface is located above, the sealing structure is detached from the first end and suspended below the first end.

9. The refrigeration air duct according to claim 8, characterized in that: The sealing structure is a sphere with a diameter no less than the caliber of the first end.

10. A wine cabinet, characterized in that: Comprising the refrigeration air duct as described in any one of claims 1-9.

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