Door-in-door structure and refrigerator

Abstract

The application relates to a door-in-door structure and a refrigerator, and relates to the technical field of the refrigerator.The door-in-door structure comprises a box body, a first door body is hinged to the box body, a through slot is formed in the first door body and is communicated with the internal space of the box body, at least one third door body is arranged at the end of the through slot away from the box body, the third door body is provided with a driving assembly for controlling the opening and closing of the third door body, and all the third door bodies can block the through slot when being in the closed state.Compared with completely opening the refrigerator door, the application can reduce cold air leakage, and can greatly reduce the energy consumption in daily use while not affecting the functionality of the refrigerator.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, and particularly to a door-in-door structure and a refrigerator. Background Technology

[0002] As people's living standards improve, the demand for large refrigerators is also increasing. A large number of large-capacity refrigerators have appeared on the high-end market. However, it is usually necessary to fully open the refrigerator door to retrieve the food stored inside. When the refrigerator door is fully open, cold air leakage occurs. Therefore, there is an urgent need for a door-in-door structure refrigerator that can reduce cold air leakage compared to fully opening the refrigerator door, thus significantly reducing daily energy consumption without affecting the refrigerator's functionality. Summary of the Invention

[0003] This invention provides a door-in-door structure and a refrigerator, which can reduce cold air leakage compared to fully opening the refrigerator door, thus greatly reducing energy consumption during daily use without affecting the refrigerator's functionality.

[0004] In a first aspect, the present invention provides a door-within-a-door structure, including a housing, a first door hinged to the housing, a through groove on the first door communicating with the interior space of the housing, at least one third door provided at one end of the through groove along the extension direction away from the housing, the third door being provided with a drive component for controlling its opening and closing, and all the third doors being able to block the through groove when they are in the closed state.

[0005] In one embodiment, a second door is further provided on the first door body, the second door body having an access port corresponding to the through slot, and all the third doors are provided on the second door body and used to open and close the access ports. Through this embodiment, the third doors and mounting components can be installed on the second door body, leaving sufficient space on the first door body for storage.

[0006] In one embodiment, one end of the second door is hinged to the first door. This embodiment allows the third door to be opened individually, or all third doors to be opened simultaneously via the second door, facilitating the removal of objects wider than the third door itself.

[0007] In one embodiment, a partition is provided inside the retrieval port, dividing the retrieval port into multiple openings corresponding to different positions of the through slot. The third door is respectively located at each of these openings. This embodiment, by cooperating with the partition, divides the retrieval port into multiple openings, matching the third door with each opening, reducing the area of ​​the third door, and further reducing cold air leakage when the third door is opened.

[0008] In one embodiment, the drive assembly includes a rotating shaft and a servo motor. One end of the third door is hinged to the second door via the rotating shaft, and one end of the rotating shaft is connected to the servo motor. With this embodiment, the servo motor enables the third door to automatically rotate around the rotating shaft, facilitating automated control of the opening and closing of the third door. Manual opening and closing of the third door is unnecessary, and there is no need to add additional grooves or handles to the third door, thus improving its overall compactness.

[0009] In one embodiment, a permanent magnet is provided on the third door, and an electromagnet adapted to the permanent magnet is provided on the partition and / or the second door. Through this embodiment, by cooperating with the electromagnet and the permanent magnet, the opening, closing, and locking of the third door can be controlled by commands, ensuring a tight seal when closed.

[0010] In one embodiment, the third door is further provided with a pressure sensor, which is capable of contacting the partition and / or the second door.

[0011] In one embodiment, a shelf is also installed within the through slot, and slide rails are respectively provided on the opposite side walls of the through slot. The shelf has grooves at both ends that fit the slide rails. This embodiment increases the space inside the through slot for fixing objects, thus increasing space utilization.

[0012] In one embodiment, the slide rail has a dovetail or T-shaped cross-section. This embodiment ensures the integration of the shelf and the first door.

[0013] Secondly, the present invention provides a refrigerator comprising the door-in-door structure as described above.

[0014] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0015] The door-in-door structure and refrigerator provided by this invention have at least the following advantages compared with the prior art:

[0016] By setting a third door on the first door, the third doors can be controlled independently. Opening the third door can open the first door, allowing you to retrieve objects that can only be retrieved by opening the first door. However, compared to opening the first door, the third door has a smaller area, which reduces cold air leakage and greatly reduces daily energy consumption without affecting the refrigerator's functionality. Attached Figure Description

[0017] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the second door of the present invention in the open state;

[0019] Figure 2 This is a schematic diagram of the third door of the present invention in the open state;

[0020] Figure 3 This is an exploded view of the present invention;

[0021] Figure 4 This is a cross-sectional schematic diagram of the third door when it is closed;

[0022] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0023] Figure label:

[0024] 10. First door; 11. Through slot; 12. Shelf; 20. Second door; 30. Third door; 40. Box; 50. Partition; 51. Divider; 60. Servo motor; 70. Electromagnet; 80. Permanent magnet. Detailed Implementation

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figure 1-3 As shown, the present invention provides a door-within-a-door structure, including a housing 40, a first door 10 hinged to the housing 40, a through groove 11 communicating with the internal space of the housing 40 on the first door 10, at least one third door 30 is provided at one end of the through groove 11 away from the housing 40, and the third door 30 is provided with a drive component for controlling its opening and closing, and when all the third doors 30 are in the closed state, they can block the through groove 11.

[0028] Specifically, the illustrated cabinet 40 is a double-door structure, with the third door 30 mounted on one side of the first door 10. It should be noted that this door-within-a-door structure is also applicable to single-door cabinet 40 structures, or the third door 30 can be mounted on both doors of a double-door cabinet. One side of the first door 10 is hinged to the cabinet 40. A through-slot 11 extends through the first door 10, and the cross-sectional shape of the through-slot 11 is square to facilitate the installation of a shelf 12 within it. The side of the through-slot 11 closest to the interior space of the cabinet 40 is the inner side, and the side furthest from the interior space of the cabinet 40 is the outer side. The third door 30 is located on the outer side of the through-slot 11. It should be noted that the third door 30 can be directly mounted inside the through-slot 11, i.e., on the first door 10, or it can be mounted outside the through-slot 11 without direct connection to the first door 10. However, when the third door 30 is closed, it can block the through-slot 11, ensuring the normal operation of the cabinet 40.

[0029] In one embodiment, a second door 20 is also provided on the first door 10. The second door 20 has an access port corresponding to the through slot 11. All third doors 30 are provided on the second door 20 and are used to open and close the access ports. Through this embodiment, the third doors 30 and the components for installation can be installed on the second door 20, so that the first door 10 has sufficient space for storage.

[0030] Specifically, when there is only one third door 30, the area of ​​the third door 30 is smaller than the area of ​​the first door 10. More preferably, the area of ​​the third door 30 is smaller than the cross-sectional area of ​​the through groove 11, that is, the size of the object that can be taken out by opening the second door 20 is larger than the size of the object that can be taken out by opening the third door 30.

[0031] In one embodiment, one end of the second door 20 is hinged to the first door 10. With this embodiment, the third door 30 can be opened individually, or all third doors 30 can be opened simultaneously via the second door 20, facilitating the removal of objects wider than the third door 30.

[0032] In one embodiment, a partition 50 is provided inside the access port, dividing the access port into multiple sub-ports 51 corresponding to different positions of the through slot 11. A third door 30 is respectively located at each sub-port 51. Through this embodiment, the third door 30 cooperates with the partition 50 to subdivide the access port into multiple sub-ports 51. The third door 30 matches the sub-ports 51, reducing the area of ​​the third door 30 and further reducing cold air leakage when the third door 30 is opened.

[0033] Specifically, the partitions 50 can be arranged side by side or in a crisscross pattern, such as... Figure 1-3As shown, two partitions 50 are arranged horizontally and vertically, dividing the through channel 11 into a section 51 area. Each section 51 is provided with a third door 30. The third door 30 can be individually controlled to open its corresponding section 51. When all the third doors 30 are in the closed state, they can close the through channel 11 and ensure the normal operation of the box 40.

[0034] In one embodiment, the drive assembly includes a rotating shaft and a servo motor 60. One end of the third door 30 is hinged to the second door 20 via the rotating shaft, and one end of the rotating shaft is connected to the servo motor 60. In this embodiment, the servo motor 60 enables the third door 30 to rotate automatically around the rotating shaft, facilitating automated control of the opening and closing of the third door 30. Manual opening and closing of the third door 30 is unnecessary, and there is no need to add additional grooves or handles to the third door 30, thus improving its overall compactness.

[0035] Specifically, with Figure 2 For example, two partitions 50 are arranged in a crisscross pattern, dividing the through slot 11 into four openings 51. Each of the four openings 51 is equipped with a third door 30. The outer side of the third door 30 is hinged to the second door 20 via a pivot. In fact, the second door 20 has a through slot 11 structure aligned with the first door 10, and the partitions 50 actually divide the through slot 11 structure on the second door 20. Each third door 30 has a servo motor 60 mounted on its pivot. The angle of rotation of the servo motor 60 at one time can be set as needed according to actual usage requirements.

[0036] like Figure 4 As shown, in one embodiment, a permanent magnet 80 is provided on the third door 30, and an electromagnet 70 adapted to the permanent magnet 80 is provided on the partition 50 and / or the second door 20. Through this embodiment, by cooperating with the permanent magnet 80, the opening, closing, and locking of the third door 30 can be controlled by commands, ensuring a tight seal when closed.

[0037] Specifically, the permanent magnet 80 and the electromagnet 70 work together to generate a mutual attractive force when energized, ensuring the stability of the third door 30 when closed and preventing it from opening arbitrarily. It should be further noted that when there is only one third door 30, or when the third door 30 opens in opposite directions, the electromagnet 70 is installed on the second door 20. When the third doors 30 open in opposite directions, the electromagnet 70 is installed on the partition 50, and a groove for installing the electromagnet 70 is provided on the partition 50. After the electromagnet 70 is installed, an end cap can be placed at the top of the groove to seal the electromagnet 70.

[0038] In one embodiment, the third door 30 is also provided with a pressure sensor that can contact the partition 50 and / or the second door 20.

[0039] Specifically, the pressure sensor is located at the corner of the third door body 30, such as... Figure 3 As shown, the pressure sensors on the four third door bodies 30 are located in the center of the entire structure. Upon receiving an open signal, the pressure sensors generate a repulsive force between the electromagnet 70 and the permanent magnet 80, which assists the servo motor 60 in automatically opening the third door body 30. Upon receiving a close signal, the pressure sensors generate an attractive force between the electromagnet 70 and the permanent magnet 80, which assists the servo motor 60 in automatically closing the door. The electromagnet 70 ensures a tighter seal between the third door body 30 and the inner frame of the second door body 20, reducing heat leakage. Due to the limited space in the third door body 30, the attraction and repulsion between the electromagnet 70 and the permanent magnet 80 eliminates the need for a hand latch or pre-reserved latch positions, improving the aesthetics of the door's front.

[0040] In one embodiment, a shelf 12 is also installed inside the through groove 11. Slide rails are respectively provided on the opposite two side walls of the through groove 11, and slide grooves adapted to the slide rails are opened at both ends of the shelf 12. Through this embodiment, the shelf 12 increases the space inside the through groove for fixing and placing objects, thereby increasing the space utilization rate.

[0041] Specifically, the slide rail can be set on the side wall or the bottom wall of the through groove 11, and multiple shelves 12 can be set up and arranged in a vertical direction.

[0042] In one embodiment, the cross-sectional shape of the slide rail is dovetail-shaped or T-shaped. This embodiment ensures the integrity of the shelf 12 and the first door 10.

[0043] Example 2

[0044] This invention proposes a refrigerator including the door-in-door structure described above, thereby possessing all the technical effects it possesses. For other structures not described in detail, existing technologies can be used to make them have the functions of a refrigerator.

[0045] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A door-within-a-door structure, comprising a housing, wherein a first door is hinged to the housing, characterized in that, The first door has a through groove that connects to the interior space of the box. At least one third door is provided at the end of the through groove away from the box. The third door is provided with a drive component for controlling its opening and closing. When all the third doors are in the closed state, they can block the through groove. The first door body is also provided with a second door body, the second door body has an opening for taking out and putting out corresponding to the through slot, and all the third doors body are provided on the second door body and are used to open and close the opening for taking out and putting out; The inside of the retrieval port is provided with a partition, which divides the retrieval port into multiple openings that correspond one-to-one with different positions of the through slot, and the third door is respectively located at each of the openings; The area of ​​the third door is smaller than the cross-sectional area of ​​the through groove.

2. The door-within-a-door structure according to claim 1, characterized in that, One end of the second door is hinged to the first door.

3. The door-within-a-door structure according to claim 1, characterized in that, The drive assembly includes a rotating shaft and a servo motor. One end of the third door is hinged to the second door via the rotating shaft, and one end of the rotating shaft is connected to the servo motor.

4. The door-within-a-door structure according to claim 1, characterized in that, The third door is provided with a permanent magnet, and the partition and / or the second door is provided with an electromagnet that can be adapted to the permanent magnet.

5. The door-within-a-door structure according to claim 1, characterized in that, The third door is also equipped with a pressure sensor, which can contact the partition and / or the second door.

6. The door-within-a-door structure according to any one of claims 1-3, characterized in that, A shelf is also installed inside the through groove. Slide rails are respectively installed on the opposite two sides of the through groove, and slide grooves that are adapted to the slide rails are opened at both ends of the shelf.

7. The door-within-a-door structure according to claim 6, characterized in that, The cross-sectional shape of the slide rail is either dovetail-shaped or T-shaped.

8. A refrigerator, characterized in that, Includes the door-within-a-door structure as described in any one of claims 1-7.

Images