Door assemblies, refrigerators and refrigeration equipment

Abstract

The present invention provides a door body assembly, a refrigerator and a refrigeration device. The door body assembly includes: a door body; a lifting shelf, the lifting shelf being arranged on the door body or on the door frame where the door body is located; an air outlet structure, the air outlet structure being connected to the lifting shelf, and the air outlet structure being movable on the lifting shelf, with the air outlet direction of the air outlet structure facing the door body. The door body assembly, the refrigerator and the refrigeration device provided by the present invention utilize the air outlet structure to discharge air from the door body, utilize the air flow to defog the door body, thereby quickly removing the fog on the door body, making it convenient for customers to observe the items inside through the door body, and improving the user experience of customers. In addition, the lifting shelf is utilized to enable the air outlet structure to move back and forth along the plane where the door body is located, thereby defogging all positions of the door body, further improving the defog efficiency of the door body.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, in particular to a door assembly, a refrigerator and refrigeration equipment. Background Art

[0002] Freezers are common refrigeration devices in supermarkets and convenience stores. To facilitate product selection for customers, some freezers feature glass doors, and the purchasing process involves scanning a code, opening the door, picking up the product, and closing the door. Existing glass-door freezer vending machines are used in high-humidity weather, particularly during much of spring and summer in southern China. When a customer uses the vending machine, the temperature inside the machine is low, causing the door to also be cold. When exposed to high-humidity air, the glass door quickly fogs up, and after closing, it takes 30 minutes or longer for the door to return to normal. Consequently, the glass door remains foggy for a period of time after closing, preventing customers from confirming the product inside the vending machine through the door, severely impacting the subsequent customer experience. Summary of the Invention

[0003] In order to solve the technical problem in the prior art that fogging on glass doors affects customer experience, a door assembly, a refrigerator and a refrigeration device are provided that can discharge air from the door body to quickly defog to improve customer experience.

[0004] A door assembly, comprising:

[0005] Door body;

[0006] A lifting shelf, the lifting shelf being arranged on the door body or on the door frame where the door body is located;

[0007] An air outlet structure is connected to the lifting shelf, and the air outlet structure can move on the lifting shelf, and the air outlet direction of the air outlet structure is toward the door body.

[0008] The air outlet structure includes an air outlet rod, which is movably arranged on the lifting shelf. The air outlet rod is provided with an air blowing port, and the air blowing port faces the door body.

[0009] The air outlet rod moves along the height direction of the door body, and the central axis of the air outlet rod is parallel to the width direction of the door body.

[0010] The air outlet structure further includes an air supply pipe, which is arranged on the lifting shelf, and the air outlet rod is connected to the air supply pipe.

[0011] The air supply pipe is provided with a plurality of air outlets, all of which are arranged in sequence along the moving direction of the air outlet rod, and the air outlet rod can be connected to any one of the air outlets.

[0012] The air outlet structure includes a baffle, which corresponds to the air outlet one by one, and the baffle has a closed state for closing the corresponding air outlet and an open state for opening the air outlet.

[0013] A strip groove is provided on the air supply pipe, the end of the air outlet rod is movably provided in the strip groove, the air outlet is provided on the bottom surface of the strip groove, and the baffle can be moved along the width direction of the strip groove to switch between the closed state and the open state.

[0014] The air outlet structure further includes a reset member, which is disposed in the strip groove and is connected to the baffle.

[0015] A limiting structure is provided at the opening of the strip-shaped groove, and the air outlet rod is limitedly matched with the limiting structure.

[0016] The baffle is provided with a first guide member, and the air outlet rod is provided with a second guide member. The first guide member and the second guide member cooperate with each other to realize the switching of the baffle between the closed state and the open state.

[0017] The air outlet structure also includes a sliding block, which is movably arranged on the lifting shelf, and the sliding block is provided with the second guide member. A ventilation duct is provided in the sliding block, and the air outlet rod is arranged on the sliding block, and the air outlet rod is connected to the air supply pipe through the ventilation duct.

[0018] The door assembly further includes a driving mechanism, which is disposed on the lifting shelf, and the air outlet rod is connected to the driving mechanism.

[0019] The driving mechanism includes a driving motor and a screw rod. The driving motor is arranged on the lifting shelf. The screw rod is connected to the driving motor. The air outlet rod is movably arranged on the screw rod.

[0020] There are two screw rods, which are arranged side by side on the lifting shelf along the width direction of the door body, and are transmission connected to each other. One end of the air outlet rod is movably set on one of the screw rods, and the other end of the air outlet rod is movably set on the other screw rod.

[0021] A refrigerator comprises the door assembly mentioned above.

[0022] A refrigeration device comprises the above-mentioned door assembly.

[0023] The door assembly, refrigerator and refrigeration equipment provided by the present invention utilize an air outlet structure to discharge air from the door body and utilize airflow to defog the door body, thereby quickly removing the fog on the door body, making it convenient for customers to observe the items inside through the door body, and improving the customer's usage experience. In addition, a lifting shelf is utilized to enable the air outlet structure to move back and forth along the plane where the door body is located, thereby defogging various positions of the door body, further improving the defog efficiency of the door body. In addition, the air outlet structure can concentrate the airflow on the door body, thereby increasing the airflow speed, improving the defog efficiency of the position corresponding to the air outlet structure on the door body, and improving the customer's usage experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a refrigerator provided in an embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of a door assembly provided in an embodiment of the present invention;

[0026] Figure 3 A schematic structural diagram of an air outlet structure provided in an embodiment of the present invention;

[0027] Figure 4 A three-dimensional diagram of an air outlet structure provided by an embodiment of the present invention;

[0028] Figure 5 A schematic structural diagram of an air supply pipe and a sliding block provided in an embodiment of the present invention;

[0029] Figure 6 Another structural schematic diagram of the air supply pipe and the sliding block provided in an embodiment of the present invention;

[0030] Figure 7 A cross-sectional view of an air supply pipe and a sliding block provided in an embodiment of the present invention;

[0031] Figure 8 A schematic structural diagram of a sliding block and a second guide block provided in an embodiment of the present invention;

[0032] Figure 9 A schematic structural diagram of a baffle and a first guide block provided in an embodiment of the present invention;

[0033] Figure 10 A schematic structural diagram of a reset element provided in an embodiment of the present invention;

[0034] Figure 11 A schematic structural diagram of a lifting shelf provided in an embodiment of the present invention;

[0035] Figure 12 A partial schematic diagram of a lifting shelf provided in an embodiment of the present invention;

[0036] In the picture:

[0037] 1. Door; 2. Lifting shelf; 31. Air outlet rod; 32. Air blowing port; 33. Air supply pipe; 34. Air outlet; 35. Baffle; 36. Strip groove; 37. Limiting structure; 38. First guide member; 39. Second guide member; 4. Reset member; 5. Sliding block; 51. Ventilation duct; 61. Drive motor; 62. Screw; 63. Worm gear device; 64. Connecting rod. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0040] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to facilitate the embodiments of the present invention described herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatuses.

[0041] It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for ease of description and are not intended to indicate or imply that the devices or components described must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "installed," "disposed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] In the prior art, refrigerators are used as unmanned vending machines, which have a cabinet body for storing items and a door body (preferably a glass door) for displaying items. Customers can observe the items in the refrigerator through the door body and select the corresponding items as needed. The refrigerator will cool the inside of the cabinet to ensure the reliability of the items and keep the items cool. However, there is moisture in the air, and during the refrigeration process inside the refrigerator, the door body will also be cooled and lower than the temperature around the refrigerator. When the air contacts the door body with a lower temperature, it will condense on the door body to form water mist, which reduces the permeability of the door body. When the door body is closed, a large amount of water mist still remains on the door body. At this time, the customer cannot observe the inside of the cabinet through the door body, and it takes a certain amount of time (30 minutes or even longer) to remove the water mist on the door body through the refrigeration of the refrigerator. During this demisting process, the customer cannot observe the items through the door body and will not use the refrigerator, resulting in a poor customer experience. For this reason, Figures 1 to 12 The door assembly shown includes: a door body 1; a lifting shelf 2, the lifting shelf 2 being arranged on the door body 1 or on the door frame where the door body 1 is located; and an air outlet structure, the air outlet structure being connected to the lifting shelf 2 and being movable on the lifting shelf 2, with the air outlet direction of the air outlet structure being toward the door body 1. The air outlet structure is used to discharge air to the door body 1, and the air flow is used to defog the door body 1, thereby quickly removing fog on the door body 1, making it easier for customers to observe items inside through the door body 1 and improving the user experience. The lifting shelf 2 is used to enable the air outlet structure to cyclically move along the plane where the door body 1 is located, thereby defogging all positions of the door body 1, further improving the defogging efficiency of the door body 1. The air outlet structure is able to concentrate the airflow on the door body 1, thereby increasing the airflow velocity and improving the defogging efficiency at the position corresponding to the air outlet structure on the door body 1, thereby improving the user experience.

[0044] As an embodiment, the air outlet structure includes an air outlet rod 31, which is movably arranged on the lifting shelf 2. The air outlet rod 31 is provided with an air outlet 32, and the air outlet 32 ​​faces the door body 1. The air outlet rod 31 is used to increase the air outlet area of ​​the door body 1. When the air outlet rod 31 moves, the air outlet 32 ​​can simultaneously blow air to a certain area in the width direction of the door body 1 to achieve defogger, so that the air outlet rod 31 only needs to move along the height direction of the door body 1, thereby improving the defogger efficiency of the door body 1. Since the length of the door body 1 is much greater than the width, it is preferred that the air outlet rod 31 moves along the height direction of the door body 1, and the central axis of the air outlet rod 31 is parallel to the width direction of the door body 1. The length of the air outlet rod 31 is reduced to ensure the air volume and air speed of all the air outlets 32 on the air outlet rod 31, while avoiding the problem of bending due to the excessive length of the air outlet rod 31. Under the premise of ensuring rapid demisting of the door body 1, the demisting of the door body assembly is guaranteed to be reliable.

[0045] Since the air outlet rod 31 is movably provided, the air inlet duct of the air outlet rod 31 also needs to change continuously with the movement of the air outlet rod 31. To this end, the air outlet structure further includes an air supply pipe 33, which is provided on the lifting shelf 2 and is connected to the air outlet rod 31. As the air outlet rod 31 moves, the air outlet rod 31 can be connected to different positions of the air supply pipe 33, thereby ensuring reliable air supply to the air outlet rod 31.

[0046] Specifically, the air supply pipe 33 is provided with a plurality of air outlets 34, all of which are arranged in sequence along the moving direction of the air outlet rod 31, and the air outlet rod 31 can be connected to any of the air outlets 34. As the air outlet rod 31 moves, the air outlet 34 connected thereto is continuously switched, so that the air outlet rod 31 is always connected to the air supply pipe 33 through at least one air outlet 34, thereby ensuring that the air outlet rod 31 always maintains an air outlet state during the movement, thereby reliably blowing air to all parts of the door body 1 and improving the demisting effect of the door body 1.

[0047] In order to prevent all the air outlets 34 of the air supply pipe 33 from discharging air, thereby preventing air from entering the air outlet rod 31, the air outlet structure includes a baffle 35. The baffle 35 corresponds to each of the air outlets 34, and the baffle 35 has a closed state, which closes the corresponding air outlet 34, and an open state, which opens the air outlet 34. When the air outlet rod 31 moves to a position corresponding to a certain air outlet 34, the baffle 35 of the air outlet 34 moves and switches the air outlet 34 to the open state, while the other air outlets 34 remain closed. The air supply pipe 33 can only communicate with the air outlet rod 31 through the air outlet 34 in the open state, thereby ensuring the air speed and air volume of the air outlet 32 ​​on the air outlet rod 31, thereby ensuring the demisting effect on the door body 1.

[0048] To prevent the baffle 35 from falling out of the air supply pipe 33 and being unable to close the air outlet 34, a strip groove 36 is provided on the air supply pipe 33. The end of the air outlet rod 31 is movably disposed within the strip groove 36. The air outlet 34 is disposed on the bottom surface of the strip groove 36. The baffle 35 can move along the width direction of the strip groove 36 to switch between the closed state and the open state. In other words, the movement direction of the air outlet rod 31 is the length direction of the strip groove 36, while the baffle 35 moves along the width direction of the strip groove 36 to open or close the air outlet 34. At this time, the strip groove 36 limits the displacement of the baffle 35 in the width direction, so that the baffle 35 can reliably switch the air outlet 34 between the closed state and the open state, ensuring the reliable movement of the baffle 35. Preferably, the end of the air outlet rod 31 is arranged in the strip groove 36 and is located on the side of the baffle 35 away from the bottom surface of the strip groove 36. The baffle 35 slides between the end of the air outlet rod 31 and the bottom surface of the strip groove 36, so that the baffle 35 only has freedom in this direction, ensuring the reliable movement of the baffle 35, and then ensuring the reliable connection between the air supply pipe 33 and the air outlet rod 31, thereby ensuring the demisting effect of the door body 1.

[0049] like Figure 6 As shown, a limiting structure 37 is provided at the opening of the strip groove 36, and the air outlet rod 31 is limitedly engaged with the limiting structure 37. The limiting structure 37 includes a first closing plate, which is arranged at the opening of the strip groove 36 along the width direction of the strip groove 36. A first spacing is provided between the first closing plate and the bottom surface of the strip groove 36. The first closing plate does not block the air outlet 34. The baffle 35 is movably arranged within the first spacing. The first closing plate can further limit the possibility of the baffle 35 moving away from the strip groove 36, thereby ensuring reliable movement of the baffle 35.

[0050] To achieve automatic switching of the baffle 35's state, a first guide member 38 is provided on the baffle 35, and a second guide member 39 is provided on the air outlet rod 31. The first guide member 38 and the second guide member 39 cooperate to guide and coordinate with each other to switch the baffle 35 between the closed and open states. When the air outlet rod 31 moves to a set position, the first guide member 38 and the second guide member 39 contact each other and guide the baffle 35, forcing it to switch from the closed state to the open state. This ensures that when the air outlet rod 31 moves to any position on the air supply pipe 33, the corresponding air outlet 34 on the air supply pipe 33 automatically opens and connects with the air outlet rod 31.

[0051] Specifically, such as Figures 6 to 9 As shown, a first guide block with a triangular structure is provided on the baffle 35. The triangle of the first guide block has two adjacent oblique sides, and the two oblique sides respectively constitute the two first guide surfaces of the first guide member 38. At the same time, two second guide blocks arranged opposite to each other are provided on the air outlet rod 31. The guide block is a triangle, and one vertex of the triangle faces away from the air outlet rod 31, and one oblique surface of the triangle constitutes the second guide surface of the second guide member 39. The two guide blocks together constitute the second guide member 39. When the air outlet rod 31 approaches the baffle 35 from the first side of the baffle 35, a second guide member 39 gradually contacts the first guide block, and the second guide surface on the second guide 39 contacts a first guide surface on the first guide block. The guide surface and the second guide surface are both inclined surfaces, so that when the first guide surface and the second guide surface slide relative to each other, an extrusion force will be generated to squeeze the baffle 35 toward the open state, that is, at this time the second guide member 39 gradually squeezes the first guide member 38, and the separation of the extrusion force along the width direction of the strip groove 36 can make the baffle 35 move in the direction of opening the air outlet 34 to achieve the opening of the air outlet 34; similarly, when the air outlet rod 31 approaches the baffle 35 from the second side of the baffle 35, the second guide surface on the other second guide block contacts the other first guide surface, and the purpose of switching the baffle 35 to the open state is also achieved, so that the baffle 35 can be driven to move during the rising or falling process of the air outlet rod 31 to ensure reliable communication between the air outlet rod 31 and the air supply pipe 33.

[0052] In one embodiment, the first guide block is an isosceles triangle, with the two legs of the isosceles triangle forming the two first guide surfaces. Preferably, the ideal isosceles triangle is an equilateral triangle, in which the separation of the extrusion force generated by the mutual compression of the first guide member 38 and the second guide member 39 to drive the movement of the baffle 35 is maximized, thereby ensuring reliable movement of the baffle 35.

[0053] The second guide block is in the shape of a right triangle, with the slope of the right triangle forming the second guide surface. Preferably, the ideal right triangle has a vertex angle of 30°. At this point, the separation of the extrusion force generated by the mutual compression of the first guide member 38 and the second guide member 39 to drive the baffle 35 to move is maximized, thereby ensuring reliable movement of the baffle 35.

[0054] Among them, such as Figure 6 As shown, the limiting structure 37 also includes a second closing plate, which is arranged on the side of the first closing plate away from the bottom surface of the strip groove 36, and there is a second distance between the second closing plate and the first closing plate, and a through hole is provided on the second closing plate, which corresponds to the air outlet 34, and a protrusion structure is provided on the side of the air outlet rod 31, which can extend into the corresponding second distance and can slide freely within the second distance. At this time, the second closing plate limits the air outlet rod 31 from moving in the direction of escaping the strip groove 36, and at the same time, the end of the air outlet rod 31 partially overlaps with the baffle 35, and the second guide member 39 is provided on the end of the air outlet rod 31 and also partially overlaps with the baffle 35. When the air outlet rod 31 moves to the position of this air outlet 34, the cooperation of the first guide member 38 and the second guide member 39 can drive the baffle 35 to move so that the baffle 35 is switched from a closed state to an open state.

[0055] To ensure reliable movement of the baffle 35 and automatic closure of the air outlet 34, the air outlet structure further includes a reset member 4, which is disposed within the strip-shaped groove 36 and connected to the baffle 35. The reset member 4 forces the baffle 35 to switch to a closed state. When the first guide member 38 and the second guide member 39 press against each other, the reset member 4 is squeezed and accumulates energy. When the first guide member 38 and the second guide member 39 separate, the reset member 4 releases the energy, driving the baffle 35 to move, thereby closing the air outlet 34.

[0056] Preferably, the reset member 4 is a spring sheet, which is U-shaped or V-shaped, and both ends of the spring sheet abut against the side walls of the strip groove 36, and the middle protrusion of the spring sheet abuts against the baffle 35. When the air outlet rod 31 approaches the baffle 35, the baffle 35 is forced to move and switch to the open state. When the spring sheet is squeezed, the height of the spring sheet decreases and accumulates elastic force. When the air outlet rod 31 moves away from the baffle 35, the spring sheet releases the elastic force and drives the baffle 35 to switch to the closed state, thereby closing the air outlet 34. The cooperation between the spring sheet and the air outlet rod 31 realizes the free opening and closing of the air outlet 34, ensuring reliable ventilation of the air outlet rod 31.

[0057] Optionally, the air outlet structure further includes a sliding block 5, which is movably mounted on the lifting shelf 2. The sliding block 5 is provided with the second guide member 39. A ventilation duct 51 is provided within the sliding block 5. The air outlet rod 31 is mounted on the sliding block 5 and communicates with the air supply pipe 33 via the ventilation duct 51. Separately machining the air outlet rod 31 and the sliding block 5 reduces the difficulty of machining the air outlet rod 31. When the sliding block 5 or the air outlet rod 31 is damaged and needs to be replaced, only the corresponding parts need to be replaced.

[0058] The door assembly further comprises a driving mechanism, which is arranged on the lifting shelf 2, and the air outlet rod 31 is connected to the driving mechanism. The driving mechanism drives the air outlet rod 31 to move, thereby achieving demisting of the entire door body 1.

[0059] Specifically, the drive mechanism includes a drive motor 61 and a screw rod 62. The drive motor 61 is mounted on the lifting shelf 2, the screw rod 62 is connected to the drive motor 61, and the air outlet rod 31 is movably mounted on the screw rod 62. The drive motor 61 drives the screw rod 62 to rotate, while the air outlet rod 31 can only move up and down due to the limitation of the ventilation duct. Therefore, the rotation of the drive motor 61 is completely converted into the lifting movement of the air outlet rod 31, thereby achieving the movement of the air outlet rod 31.

[0060] Since the door body 1 has a certain width, the length of the air outlet rod 31 needs to be equal to the width of the door body 1. In this case, the length of the air outlet rod 31 is long, which poses a risk of damage. Therefore, there are two screw rods 62, which are arranged side by side on the lifting shelf 2 along the width direction of the door body 1, and the two screw rods 62 are transmission-connected. One end of the air outlet rod 31 is movably disposed on one of the screw rods 62, and the other end of the air outlet rod 31 is movably disposed on the other of the screw rods 62. That is, the two screw rods 62 are respectively used to drive the two ends of the air outlet rod 31 to move synchronously, and the two screw rods 62 are transmission-connected via a transmission structure to ensure that the movement of the air outlet rod 31 is smooth and reliable.

[0061] Preferably, the driving structure includes a worm gear device 63 and a connecting rod 64. The worm gear device 63 is arranged on the lifting shelf 2, and a worm gear is provided at the end of the screw rod 62 connected to the driving motor 61. One end of the connecting rod 64 is provided with a thread to form a worm structure. Similarly, the end of the other screw rod 62 is also provided with a worm gear, and the other end of the connecting rod 64 is provided with a thread to form a worm structure. The driving motor 61 drives a screw rod 62 to rotate, and drives the connecting rod 64 to rotate through a worm gear device 63, and then the connecting rod 64 drives the other screw rod 62 to rotate through another worm gear device 63, thereby achieving the purpose of driving both ends of the air outlet rod 31 at the same time, ensuring that the movement of the air outlet rod 31 is smooth and reliable.

[0062] The shape of the lifting shelf 2 is the same as the frame shape of the door body 1. Figure 1 As shown in the figure, the lifting shelf 2 is a U-shaped structure with an opening downward, two screw rods 62 respectively constitute two columns of the lifting shelf 2, and the connecting rod 64 constitutes the horizontal section of the lifting shelf 2.

[0063] The door assembly further includes a fan, which is connected to the air supply pipe 33 to supply air to the air outlet rod 31. Preferably, the fan is a centrifugal fan.

[0064] A refrigerator comprises the door assembly mentioned above.

[0065] A refrigeration device comprises the above-mentioned door assembly.

[0066] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A door assembly, characterized in that: include: Door body (1); A lifting shelf (2), the lifting shelf (2) being arranged on the door body (1) or on a door frame where the door body (1) is located; An air outlet structure, the air outlet structure is connected to the lifting shelf (2), and the air outlet structure is movable on the lifting shelf (2), and the air outlet direction of the air outlet structure is toward the door body (1) to remove the mist on the door body (1), making it convenient for customers to observe the items inside the door body (1); The air outlet structure comprises an air outlet rod (31), the air outlet rod (31) is movably arranged on the lifting shelf (2), and an air blowing port (32) is provided on the air outlet rod (31), and the air blowing port (32) faces the door body (1); The air outlet structure further includes an air supply pipe (33), the air supply pipe (33) is arranged on the lifting shelf (2), and the air outlet rod (31) is connected to the air supply pipe (33); The air supply pipe (33) is provided with a plurality of air outlets (34), all of the air outlets (34) are arranged in sequence along the moving direction of the air outlet rod (31), and the air outlet rod (31) can be connected to any one of the air outlets (34).

2. The door assembly according to claim 1, characterized in that: The air outlet rod (31) moves along the height direction of the door body (1), and the central axis of the air outlet rod (31) is parallel to the width direction of the door body (1).

3. The door assembly according to claim 1, characterized in that: The air outlet structure includes a baffle (35), the baffle (35) corresponds to the air outlet (34) one by one, and the baffle (35) has a closed state for closing the corresponding air outlet (34) and an open state for opening the air outlet (34).

4. The door assembly according to claim 3, characterized in that: The air supply pipe (33) is provided with a strip groove (36), the end of the air outlet rod (31) is movably arranged in the strip groove (36), the air outlet (34) is arranged on the bottom surface of the strip groove (36), and the baffle (35) can be moved along the width direction of the strip groove (36) to switch between the closed state and the open state.

5. The door assembly according to claim 4, characterized in that: The air outlet structure further includes a reset member (4), the reset member (4) is arranged in the strip-shaped groove (36), and the reset member (4) is connected to the baffle (35).

6. The door assembly according to claim 4, characterized in that: A limiting structure (37) is provided at the opening of the strip-shaped groove (36), and the air outlet rod (31) is in limiting cooperation with the limiting structure (37).

7. The door assembly according to claim 3, characterized in that: The baffle (35) is provided with a first guide member (38), and the air outlet rod (31) is provided with a second guide member (39). The first guide member (38) and the second guide member (39) cooperate with each other to realize the switching of the baffle (35) between the closed state and the open state.

8. The door assembly according to claim 7, characterized in that: The air outlet structure further comprises a sliding block (5), the sliding block (5) being movably arranged on the lifting shelf (2), the sliding block (5) being provided with the second guide member (39), the sliding block (5) being provided with a ventilation duct (51), the air outlet rod (31) being provided on the sliding block (5), and the air outlet rod (31) being connected to the air supply pipe (33) through the ventilation duct (51).

9. The door assembly according to claim 1, characterized in that: The door assembly further comprises a driving mechanism, the driving mechanism being arranged on the lifting shelf (2), and the air outlet rod (31) being connected to the driving mechanism.

10. The door assembly according to claim 9, characterized in that: The driving mechanism comprises a driving motor (61) and a screw rod (62); the driving motor (61) is arranged on the lifting shelf (2); the screw rod (62) is connected to the driving motor (61); and the air outlet rod (31) is movably arranged on the screw rod (62).

11. The door assembly according to claim 10, characterized in that: There are two screw rods (62), which are arranged side by side on the lifting shelf (2) along the width direction of the door body (1), and the two screw rods (62) are transmission-connected. One end of the air outlet rod (31) is movably arranged on one of the screw rods (62), and the other end of the air outlet rod (31) is movably arranged on the other of the screw rods (62).

12. A refrigerator, characterized in that: The invention comprises the door assembly according to any one of claims 1 to 11.

13. A refrigeration device, characterized in that: The invention comprises the door assembly according to any one of claims 1 to 11.

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