WO2016110161A1

WO2016110161A1 - Refrigerator

Info

Publication number: WO2016110161A1
Application number: PCT/CN2015/095263
Authority: WO
Inventors: 许锦潮; 游飞越; 王美艳; 孔冬
Original assignee: 海信容声(广东)冰箱有限公司
Priority date: 2015-01-07
Filing date: 2015-11-23
Publication date: 2016-07-14
Also published as: EP3091315B1; EP3091315A1; EP3091315B8; EP3091315A4

Abstract

A refrigerator comprises a refrigerator main door (1). An opening (2) is arranged on the door body of the refrigerator main door (1). Guide rails (3) with a secondary door (4) fitted thereon are arranged on the edge of the opening (2). The secondary door (4) is connected to a driving mechanism (5) capable of driving the secondary door (4) to slide along the guide rails (3). With the secondary door (4) sliding along the guide rails (3), the secondary door (4) can close or open the opening (2). The refrigerator solves the problems in the prior art that the external space occupied by a refrigerator increases and articles taking difficulty increases when a secondary door of the refrigerator is opened, and the cooling capacity is lost seriously because the opening is fully opened.

Description

Refrigerator

This application is required to be submitted to the China Patent Office on January 7, 2015, the application number is 201510009262.9, the invention name is “a refrigerator”, and submitted to the Chinese Patent Office on March 11, 2015, the application number is 201510107398.3, and the invention name is The priority of two Chinese patent applications for "a refrigerator" is incorporated herein by reference in its entirety.

Technical field

The invention relates to the technical field of refrigerators, and in particular to a refrigerator.

Background technique

With the improvement of people's quality of life, the storage demand for refrigerators has gradually increased, making large-volume refrigerator products highly sought after. The increase in volume will lead to a corresponding increase in the volume of the refrigerator, and the door body of the refrigerator will also become wider and wider. Since the user frequently opens the large-volume door when taking the object, the leakage of the refrigerator is severely caused, causing the compressor to start frequently, resulting in the refrigerator being able to The consumption is increased. In addition, when a large amount of articles are stored in the refrigerator, since the depth of the refrigerator is large, if the articles are not arranged in a good manner, the difficulty of the user's retrieval is increased.

1 is a refrigerator according to the prior art, including a refrigerator door 01. The refrigerator door 01 is provided with a storage space (not shown). The opening 02 of the storage space is provided with a secondary door 03, and the rotating shaft 04 of the secondary door 03 is provided. Horizontally disposed at the bottom of the opening 02, the rotation of the secondary door 03 about the rotating shaft 04 can open or close the opening 02. Since the common items are placed in the storage space on the refrigerator door 01, the secondary door 03 is only required to be opened, which avoids frequent opening and closing of the large-volume refrigerator door 01, thereby reducing the leakage of the refrigerator and reducing the refrigerator. Energy consumption.

When the secondary door 03 is opened, as the secondary door 03 rotates around the rotating shaft 04, the angle between the secondary door 03 and the refrigerator door 01 increases, causing the space occupied by the refrigerator to increase, and the secondary door 03 is fully opened and then occupied. Certain external space creates unnecessary restrictions and sometimes blocks in front of the human body, making it more difficult to pick up. In addition, each time the door is opened, the opening 02 on the refrigerator door 01 is completely opened, and the loss of the cooling capacity is still large.

Summary of the invention

The embodiment of the invention provides a refrigerator, which can solve the problem of the refrigerator as a secondary door in the prior art. When opened, the external space occupied by the refrigerator increases, the difficulty of taking the object increases, and the loss of the cold amount due to the opening of the opening is serious.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A refrigerator includes a main door of a refrigerator, an opening is formed in a door body of the main door of the refrigerator, a guide rail is disposed at an edge of the opening, a secondary door is matched on the guide rail, and a driving mechanism is connected to the secondary door The drive mechanism can drive the secondary door to slide along the rail, and the secondary door can close or open the opening as the secondary door slides along the rail.

The refrigerator provided by the embodiment of the invention has a secondary door on the main door of the refrigerator. When the object is taken and put, the driving mechanism drives the secondary door to slide along the guide rail, so that the opening on the main door of the refrigerator is opened, and the contents in the box can be taken out. The driving mechanism drives the secondary door to slide in the opposite direction of the guide rail to close the opening on the main door of the refrigerator. The refrigerator provided by the embodiment of the invention can partially open or completely open the small-sized door when the common items are taken and dropped, thereby reducing the loss of the cold in the refrigerator, facilitating the user to pick up and place the article, improving the user experience, and the secondary door. When opened, the secondary door is located in the main door of the refrigerator, and is located on the same plane as the main door of the refrigerator, and will not be blocked in front of the human body, and will not affect the external space occupied by the refrigerator and the difficulty of taking the object.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

Figure 1 is a side view of a prior art refrigerator door;

2 is a schematic structural view of a main door of a refrigerator according to an embodiment of the present invention;

3 is a schematic structural view of a second gear set in a transmission assembly according to an embodiment of the present invention;

4 is a schematic structural view of a transmission component as a rack and pinion according to an embodiment of the present invention;

FIG. 5 is a schematic view showing the overall structure of a secondary door of a refrigerator passing through a transmission rope according to an embodiment of the present invention; FIG.

Figure 6 is a partial structural schematic view of the transmission assembly shown in Figure 5;

Figure 7 is a schematic structural view of the driving wheel in the transmission assembly shown in Figure 5;

Figure 8 is a partial plan view of the transmission assembly of Figure 5;

9 is a schematic structural view showing a guide rail of a refrigerator disposed in a horizontal direction according to an embodiment of the present invention;

Figure 10 is a side elevational view of the main door of the refrigerator when the thickened layer is provided in the embodiment of the present invention;

Figure 11 is a side view of the main door of the refrigerator when the vacuum insulation panel is provided in the embodiment of the present invention;

Figure 12 is a schematic view showing the sealing strip and the secondary door not in contact in the embodiment of the present invention;

Figure 13 is a schematic view showing the sealing strip and the secondary door in contact according to an embodiment of the present invention;

Figure 14 is a schematic view showing a guide wheel disposed in a guide rail according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", The orientation or positional relationship of the "top", "bottom", "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and a simplified description, rather than indicating or implying The device or component referred to must have a particular orientation, is constructed and operated in a particular orientation, and thus is not to be construed as limiting the invention.

The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, "a plurality" means two or more unless otherwise stated.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or connected in one piece; can be directly connected, It can also be connected indirectly through an intermediate medium, which can be the internal communication between two components. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

2 is a specific embodiment of a refrigerator according to an embodiment of the present invention. The refrigerator in the embodiment includes a main door 1 of the refrigerator. The door of the main door 1 of the refrigerator is provided with an opening 2, and a guide rail 3 is disposed at an edge of the opening 2. The secondary rail 4 is matched with the secondary door 4, and the secondary door 4 is connected with the driving mechanism 5. The driving mechanism 5 can drive the secondary door 4 to slide along the guiding rail 3. As the secondary door 4 slides along the guiding rail 3, the secondary door 4 can open the opening 2. Closed or opened.

The refrigerator provided in the embodiment of the present invention is provided with a secondary door 4 on the main door 1 of the refrigerator. When the object is taken and dropped, the secondary door 4 is driven to slide along the guide rail 3 through the driving mechanism 5, so that the opening 2 on the main door 1 of the refrigerator is opened, that is, The contents of the box can be taken out, and then the drive door 5 drives the secondary door 4 to slide in the opposite direction of the guide rail 3, so that the opening 2 on the main door 1 of the refrigerator is closed. The refrigerator provided by the embodiment of the invention can partially open or completely open the small-sized door 4 when the common items are taken and dropped, thereby reducing the loss of the cooling capacity in the refrigerator, facilitating the user to pick up and place the articles, and improving the user experience, and When the door 4 is opened, the secondary door 4 is located in the main door 1 of the refrigerator, and is located on the same plane as the main door 1 of the refrigerator, and is not blocked in front of the human body, and does not affect the external space occupied by the refrigerator and the difficulty of taking the object. The sliding door opening method eliminates the door hinge component which is easy to be worn out, improves the durability of the secondary door 4 of the refrigerator, and can realize the opening or closing of the secondary door 4 through the driving mechanism 5, which is beneficial to the automatic development of the refrigerator.

The provision of the guide rail 3 at the edge of the opening 2 can be carried out in two ways: in the first embodiment, the guide rail 3 is provided only at the one-sided edge of the opening 2, in which case the sliding of the secondary door 4 can only be passed through a single The side rails 3 limit the corresponding one-sided edges of the secondary door 4, so that the stability of the sliding of the secondary door 4 is low; the second embodiment is that parallel rails 3 are respectively arranged at opposite edges of the opening 2, through the two sides The guide rail 3 limits the double-sided edges of the secondary door 4, and this embodiment makes the sliding of the secondary door 4 smoother. Therefore, it is preferable to provide the guide rails 3 at the opposite edges of the opening 2, respectively.

In the present embodiment, the drive mechanism 5 includes a motor 6 and a transmission assembly 7, the output shaft of the motor 6 is drivingly coupled to the transmission assembly 7, the transmission assembly 7 is drivingly coupled to the secondary door 4, and the transmission assembly 7 can rotate the output shaft of the motor 6. Motion is converted to linear motion to drive times The door 4 slides along the guide rail 3. The power of the motor 6 is transmitted to the secondary door 4 through the transmission assembly 7, and the secondary door 4 is slid along the guide rail 3, thereby opening and closing the opening 2 on the main door 1 of the refrigerator.

2 is an embodiment of the transmission assembly 7, including a first gear 71, a first link 72, and a second link 73. The first link 72 is coupled to the door of the main door 1 of the refrigerator through the first shaft 75. The first link 72 is rotatable about the first shaft 75, the second link 73 is hinged with the first link 72 by the second shaft 76, and the first gear 71 is fixed to the output shaft of the motor 6, the first link 72 One end is a gear structure 721, and the other end is connected with a first guiding pin 722. The gear structure 721 is meshed with the first gear 71. The first door 4 is adjacent to the driving mechanism 5 and has a first sliding slot 41 perpendicular to the guiding rail 3. The first guiding pin 722 is disposed in the first sliding slot 41. The second guiding pin 731 is connected to the second guiding pin 731 at one end, and the third guiding pin 732 is connected to the other end. The second guiding pin 731 is disposed on the first guiding pin. A second sliding slot 74 perpendicular to the guide rail 3 is defined in the sliding door 41. The third guiding pin 732 is disposed in the second sliding slot 74. When the secondary door 4 is turned from the closed state to the open state, the motor 6 starts to rotate the first gear 71 counterclockwise around the motor shaft. Since the first gear 71 and the gear structure 721 are engaged, the first gear 71 drives the first link 72. Rotating clockwise about the first axis 75 while driving the second shaft 76 to rotate clockwise about the first shaft 75. At this time, the first guide pin 722 slides along the first sliding slot 41 away from the first gear 71. The two links 73 rotate counterclockwise about the second shaft 76, so that the second guide pin 731 slides along the first sliding slot 41 in a direction opposite to the sliding direction of the first guiding pin 722, and the third guiding pin 732 follows the second sliding The groove 74 slides in the same direction as the sliding direction of the first guide pin 722, thereby causing the secondary door 4 to slide along the guide rail 3 in the direction of approaching the first gear 71 until the opening 2 is fully opened; when the secondary door 4 is opened In the closed state, the motor 6 starts to rotate the first gear 71 clockwise around the motor shaft. Since the first gear 71 and the gear structure 721 are engaged, the first gear 71 drives the first link 72 to rotate counterclockwise about the first shaft 75. While driving the second shaft 76 counterclockwise around the first axis 75 Rotating, at this time, the first guide pin 722 slides along the first chute 41 in the direction of approaching the first gear 71, and the second link 73 rotates clockwise around the second shaft 76, so that the second guide pin 731 follows the a sliding groove 41 slides in a direction opposite to the sliding direction of the first guide pin 722, The three guide pins 732 slide along the second sliding slot 74 in the same direction as the sliding direction of the first guiding pin 722, thereby sliding the secondary door 4 along the guiding rail 3 in a direction away from the first gear 71 until the opening 2 is completely closed. . By the first gear 71 meshing with the gear 721 on the first link 72, the power of the motor 6 is transmitted to the first link 72 and the second link 73, causing the first link 72 and the second link 73 to drive the second time. The door 4 slides smoothly along the guide rail 3 to realize opening and closing of the opening 2. The load bearing capacity and impact resistance of the transmission assembly 7 are strong, the wear during the transmission process is small, and the manufacturing is convenient, and high precision is easily obtained during production. .

In the above embodiment, since the second chute 74 is opened on the door body of the main door 1 of the refrigerator, the strength of the corresponding position of the main door 1 of the refrigerator is lowered. If the second chute 74 is damaged, the main door of the refrigerator is caused. 1 is generally scrapped, in order to prevent this from happening, in another embodiment of the present invention, the door of the main door 1 of the refrigerator is preferably provided with a support bar (not shown) perpendicular to the guide rail 3, and The second sliding slot 74 is disposed on the bracket, and the third guiding pin 732 is disposed in the second sliding slot 74. Therefore, when the second sliding slot 74 is damaged, only the bracket is replaced, and the main door of the refrigerator is avoided. The overall scrapping, while ensuring the strength of the main door 1 of the refrigerator is not affected.

In the above embodiment, since only a part of the teeth of the gear structure 721 is used during the swinging of the first link 72, in order to save the material of the gear structure 721 and simplify the processing thereof, the gear structure 721 is preferably as shown in FIG. The sector gear structure shown.

Referring to FIG. 3, the transmission assembly 7 in the embodiment of the present invention further includes a second gear 77 that meshes with the first gear 71 via the second gear 77.

Another embodiment of the transmission assembly 7 may employ a rack and pinion transmission including a transmission gear, a rack and a rack guide, the rack guide being fixed to a door body of the main door 1 of the refrigerator, the rack guide Parallel to the guide rail 3, the rack is slidable along the rack rail, one end of the rack is connected to the secondary door 4, and the transmission gear is drivingly connected to an output shaft of the motor 6, and Engaged with the rack. When the secondary door 4 is turned from the closed state to the open state, the motor 6 starts to drive the transmission gear to rotate counterclockwise around the motor shaft. At this time, the meshing gear meshes with the transmission gear along the rack rail, thereby driving the secondary door 4 along the guide rail 3. Slide in the direction of the drive gear until the opening 2 is fully open; When the secondary door 4 is turned from the open state to the closed state, the motor 6 starts to drive the transmission gear to rotate clockwise around the motor shaft. At this time, the rack meshing with the transmission gear slides along the rack guide rail, thereby driving the secondary door 4 along the guide rail 3 Slide away from the drive gear until the opening 2 is completely closed. The rotary motion of the output shaft of the motor 6 is converted into a linear motion by the rack and pinion, and the secondary door 4 is slid along the guide rail 3 to open and close the opening 2. The transmission assembly 7 can ensure a constant transmission ratio and high transmission efficiency. It is smooth, so that the sliding of the secondary door 4 along the guide rail 3 is smoother and the service life is longer.

In the above embodiment, the transmission gear, the rack and the rack guide rail may both be one. When the motor 6 is started, the transmission gear is rotated, and the transmission gear rotates to drive the rack meshing with the rack to slide along the rack guide rail, thereby causing the rack to drive. The secondary door 4 slides along the guide rail to open and close the opening 2.

In another embodiment of the present invention, the transmission gear, the rack and the rack guide rail may also be two. Referring to FIG. 4, specifically, the transmission gear includes two gears of a third gear 78 and a fourth gear 79. The rack 710 and the rack rail 711 are both two. The two racks 710 are spaced apart and are parallel to the guide rail 3, and one end of the two racks 710 is connected to the secondary door 4, and the two rack rails 711 are spaced apart. Both of them are parallel with the guide rails 3, and the two racks 710 are respectively coupled with the two rack rails 711. The third gears 78 are fixed to the output shaft of the motor 6, and the third gears 78 are respectively coupled to a rack 710 and a fourth gear. 79 engages and the fourth gear 79 meshes with the other rack 710. When the secondary door 4 is in the closed state to the open state, the motor 6 starts to drive the third gear 78 to rotate counterclockwise around the motor shaft. At this time, the fourth gear 79 meshing with the third gear 78 rotates clockwise around the center of rotation thereof. The three gears 78 and the fourth gear 79 slide along the rack rails 711 by driving the two racks 710 respectively meshed with them, thereby driving the secondary door 4 to slide along the guide rail 3 in the direction of approaching the third gear 78 until the opening 2 is opened When the secondary door 4 is turned from the open state to the closed state, the motor 6 starts to drive the third gear 78 to rotate clockwise around the motor shaft. At this time, the fourth gear 79 meshing with the third gear 78 rotates counterclockwise around its center of rotation. Rotating, the third gear 78 and the fourth gear 79 slide along the rack rail 711 by driving the two racks 710 meshed therewith, thereby sliding the secondary door 4 along the guide rail 3 in a direction away from the third gear 78 until The opening 2 is completely closed. Due to the transmission gear, rack and teeth The strip rails are two, and the driving sub-door 4 is double-sided driving when sliding. Compared with the single-side driving, the present embodiment makes the secondary door 4 more uniformly stressed, thereby avoiding the secondary door 4 being stuck during the sliding process. Preferably, the transmission gear, the rack and the rack guide are both.

As shown in FIG. 5 and FIG. 6, in another embodiment of the present invention, the transmission assembly 7 includes a guiding block 701, and the guiding block 701 is disposed in a direction parallel to the guiding rail 3. The two ends of the guiding block 701 are respectively provided with A guide wheel 703 and a second guide wheel 704, the output sleeve of the motor 6 is provided with a driving wheel 705, and the secondary door 4 includes a sliding bottom plate 702. The sliding bottom plate 702 is sleeved on the guiding block 701 and can slide along the guiding block 701 to slide. The bottom plate 702 is located between the first guide wheel 703 and the second guide wheel 704. The sliding bottom plate 702 is connected with a transmission rope 706. The transmission rope 706 includes a first transmission rope segment 7061 and a second transmission rope segment respectively located at two sides of the sliding bottom plate 702. 7062, the first transmission rope segment 7061 is disposed around the first guide wheel 703 and is wound and fixed on the driving wheel 705 in a first direction, and the second transmission rope segment 7602 is disposed around the second guide wheel 704 and is wound around the first The opposite direction is wound and fixed to the driving wheel 705.

The working process of the above embodiment is as follows: when the secondary door 4 is moved from the open position to the closed position, the output shaft of the motor 6 drives the driving wheel 705 to rotate counterclockwise, thereby pulling the first transmission rope segment 7061 and the second transmission The rope section 7602 is relaxed, so that the portion of the transmission rope between the first guide wheel 703 and the second guide wheel 704 is forced upwardly. Under the guiding action of the guiding block 701 and the guide rail 3, the sliding bottom plate 702 is pulled to drive the secondary door 4 Move up to the closed position. When the secondary door 4 is moved from the closed position to the open position, the output shaft of the motor 6 drives the driving wheel 705 to rotate clockwise, thereby pulling the second driving rope segment 7062 and relaxing the first driving rope segment 7061, so that the first door The drive rope between the guide wheel 703 and the second guide wheel 704 moves downward. Under the guiding action of the guide block 701 and the guide rail 3, the sliding bottom plate 702 is pulled to move the secondary door 4 downward to reach an open state. In the transmission structure shown in FIG. 5, compared with the general transmission structure, the number of components to be assembled is reduced, the production efficiency is improved, and the transmission rope is continuously matched with the driving wheel and the guide wheel, and the transmission rope is The flexible member avoids the friction and collision generated by the tooth and the tooth when compared with the gear transmission, thereby reducing the noise during the transmission.

In order to make the direction of the force of the secondary door coincide with the direction in which the guide rail 3 is arranged, The position and size of the first guide wheel 703 and the second guide wheel 704 are such that the portion of the drive line 706 between the first guide wheel 703 and the second guide wheel 704 is parallel to the guide rail 3, for example, the first guide wheel 703 can be disposed. The radius of the second guide wheel 704 is equal and the center is on the same straight line, so that the direction of the force of the secondary door is aligned with the direction of the guide rail 3, and the jamming phenomenon during the movement is prevented.

In order to prevent the first transmission cord segment 7061 and the second transmission cord segment 7062 wound on the driving wheel 705 from interfering with each other, as shown in FIG. 7, it may be preferable to open the first guiding parallel to each other along the outer circumference of the driving wheel 705. The slot 7051 and the second guiding slot 7052, the first driving cord segment 7061 is disposed around the first guiding wheel 703 and is wound in the first guiding slot 7051 and fixedly connected with the first guiding slot 7051. The second transmission cord section 7602 is disposed around the second guide wheel 704 and wound on the second guiding groove 7052 in a direction opposite to the first direction, and is fixedly coupled to the second guiding groove 7052. Therefore, when the secondary door 4 is moved from the open position to the closed position, the output shaft of the motor 6 drives the driving wheel 705 to rotate counterclockwise, thereby pulling the first driving rope segment 7061 to be gradually wound around the first guiding groove 7051. And disengaging the second drive rope segment 7062 to gradually disengage the second drive rope segment 7062 from the second guide groove 7052, so that the portion of the drive rope between the first guide wheel 703 and the second guide pulley 704 is forced upward. Under the guiding action of the guiding block 701 and the guide rail 3, pulling the sliding bottom plate 702 drives the secondary door 4 to move upward to reach the closed position. Therefore, the driving wheel 705 adopts a double-layer guiding groove structure, so that the first driving rope segment 7061 and the second driving rope segment 7062 wound on the driving wheel 705 can be separated from each other, thereby preventing the frictional contact with each other during the transmission process and increasing the secondary door. Resistance to movement.

Wherein, the length of the drive rope 706 wound on the driving wheel 705 should be such as to satisfy the moving stroke between the fully closed position and the fully open position of the secondary door, thereby ensuring the entire process of the secondary door between the fully closed position and the fully open position. mobile. Specifically, when the secondary door is in the fully closed position (ie, the position shown in FIG. 5), the length of the drive rope 706 wound in the first guide groove 7051 should be equal to or greater than the above-described moving stroke.

It should be noted that when the secondary door moves to the extreme position, the portion of the drive rope 706 wound on the driving wheel 705 may have been completely released. This limit case also belongs to the explanation of the "winding" described in the embodiment of the present invention. range.

In the above embodiment, the driving rope 706 may be a single rope or two separate sections. When the driving rope 706 is a whole rope, the middle of the driving rope 706 is connected to the sliding bottom plate 702. When the transmission rope 706 is divided into two sections, as shown in FIG. 6, the two sections of the transmission rope are respectively connected to the upper and lower ends of the sliding bottom plate 702.

As shown in FIG. 8, in order to reduce the frictional force when the sliding bottom plate 702 slides along the guiding block 701, a pulley 7022 may be disposed between the sliding bottom plate 702 and the guiding block 701, and specifically, the sliding bottom plate 702 may be in contact with the guiding block 701. A rotatable pulley 7022 is disposed on the inner wall, and then the sliding bottom plate 702 is sleeved on the guiding block 701, whereby the sliding bottom plate 702 and the guiding block 701 are slidably supported by the pulley 7022, so that the sliding bottom plate 702 slides along the guiding block 701. The frictional force is the rolling friction force, which greatly reduces the movement resistance of the secondary door.

Among them, the transmission cord 706 preferably uses a steel cord which is more resistant to wear.

As shown in FIG. 6 , in order to make the connection between the sliding bottom plate 702 and the secondary door 4 more stable, it is preferable to open the mounting groove 7021 on the surface of the sliding bottom plate 702 facing the secondary door, and the edge of the secondary door is locked in the mounting groove 7021. Thereby, it is possible to prevent the secondary door from being detached from the sliding bottom plate 702 during the transmission.

Since the driving mechanism 5 of the secondary door 4 is disposed in the door body of the main door 1 of the refrigerator, the thickness of the bubble layer at the corresponding position of the main door 1 of the refrigerator is reduced, resulting in a decrease in the heat insulating performance of the main door 1 of the refrigerator, in order to maintain the main door of the refrigerator 1 As shown in FIG. 10, the inner wall of the main door 1 of the refrigerator is provided with a thickening layer 11 protruding from the inner wall surface at a position corresponding to the driving mechanism 5, and the heat insulating performance of the main door 1 of the refrigerator is provided by providing the thickening layer 11. Enhanced.

Further, referring to Fig. 11, a vacuum heat insulating panel 8 may be provided on the outer surface of the drive mechanism 5, and the heat insulating performance of the main door 1 of the refrigerator may be enhanced by providing the vacuum heat insulating panel 8.

Referring to FIGS. 10 to 13, in order to ensure the sealing property of the opening 2 when the secondary door 4 is closed, a sealing strip 9 is provided along the inner wall of the opening 2, and the sealing strip 9 is provided with a groove 91 toward the side of the secondary door 4, the groove 91 is provided with an elastic protrusion 92. When the secondary door 4 is closed, the edge of the secondary door 4 can protrude into the groove 91 and press the elastic protrusion 92. At this time, the elastic protrusion 92 is in close contact with the secondary door 4. The sealing of the opening 2 when the secondary door 4 is closed is ensured.

In order to extend the service life of the elastic protrusions 92, the secondary door 4 and the sealing strip 9 are simultaneously raised. The sealing portion and the slippery property of the joint, the outer surface of the elastic projection 92 is flocked by the flocking treatment, thereby increasing the friction resistance of the elastic projection 92, thereby increasing the service life of the elastic projection 92. At the same time, the sealing property and the slipperiness of the joint of the secondary door 4 and the sealing strip 9 are improved.

Since the weather strip 9 is disposed on the inner wall of the opening 2 and the temperature at the inner wall of the opening 2 is low, the sealing strip 9 is required to maintain good elasticity at a low temperature, thereby ensuring the sealing property of the opening 2, preferably the material of the sealing strip 9. For EPDM (Ethylene-Propylene-Diene Monomer), TPE (Thermoplastic Elastomer, thermoplastic elastomer) or TPR (Thermoplastic Rubber), these three materials have good elastic properties in a low temperature environment. Thereby the sealing of the opening 2 is ensured.

In order to enhance the heat preservation performance of the refrigerator, the secondary door 4 is made of heat insulating glass, and the heat insulating glass can prevent the cold amount in the refrigerator from oozing out, thereby enhancing the heat preservation performance of the refrigerator. In addition, the user can also check the storage condition of the articles in the box through the secondary door 4 when the main door 1 and the secondary door 4 of the refrigerator are both closed, which is helpful for taking the articles.

The guide rail 3 in this embodiment can be arranged in the vertical direction. At this time, the secondary door 4 can slide up and down along the guide rail 3. In addition, as shown in FIG. 9, the guide rail 3 can also be arranged in the horizontal direction. At this time, the secondary door 4 It can slide along the guide rail 3 to the left or right. If the shelf in the main door 1 of the refrigerator is placed horizontally, when the guide rail 3 is disposed in the horizontal direction, even if the secondary door 4 is completely opened, only the items on the shelf can be taken, and when the guide rail is 3 When setting in the vertical direction, you only need to open the secondary door 4 to take the items on the whole shelf. For example, you only need to take the upper part of the secondary door 4 when taking the items on the upper shelf. The opening is reduced while the loss of the cooling capacity is reduced, and therefore, it is preferable that the guide rails 3 are disposed in the vertical direction.

Referring to FIG. 14, in order to make the secondary door 4 slide along the guide rail 3 more smoothly, the inner walls of the two sides of the guide rail 3 are respectively provided with rotatable guide wheels 31. When the secondary door 4 slides along the guide rail 3, the two sides of the secondary door 4 are respectively The guide wheels 31 are fitted to each other, and the position of the secondary door 4 is restricted by the guide wheels 31 to prevent the secondary door 4 from swinging to both sides during the sliding process, thereby making the sliding of the secondary door 4 along the guide rail 3 smoother. Further, the material of the guide wheel 31 is preferably rubber or nylon, which prevents the guide wheel 31 from leaving scratches on the glass door 4, which affects the appearance.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A refrigerator, comprising a main door of a refrigerator, wherein an opening is formed in a door body of the main door of the refrigerator, a guide rail is arranged at an edge of the opening, and a secondary door is arranged on the guide rail, and the secondary door is A drive mechanism is coupled to drive the secondary door to slide along the rail, the secondary door closing or opening the opening as the secondary door slides along the rail.
The refrigerator according to claim 1, wherein the driving mechanism comprises a motor and a transmission assembly, an output shaft of the motor is drivingly connected to the transmission assembly, and the transmission assembly is connected to the secondary door. The transmission assembly converts rotational motion of the motor output shaft into linear motion to drive the secondary door to slide along the rail.
The refrigerator according to claim 2, wherein the transmission assembly comprises a first gear, a first link, and a second link, the first link being coupled to the door of the main door of the refrigerator through the first shaft The first link is rotatable about a first axis, the second link is hinged with the first link by a second axis, and the first gear is fixed to an output shaft of the motor. One end of the first connecting rod is a gear structure, and the other end is connected with a first guiding pin, the gear structure is meshed with the first gear, and a side of the secondary door adjacent to the driving mechanism is perpendicular to the a first sliding slot of the guide rail, the first guiding pin is disposed in the first sliding slot, a second guiding pin is connected to one end of the second connecting rod, and a third guiding pin is connected to the other end. a second guiding pin is disposed in the first sliding slot, a second sliding slot perpendicular to the guiding rail is disposed on the door body of the main door of the refrigerator, and the third guiding pin is disposed on the second guiding pin Inside the chute.
The refrigerator according to claim 2, wherein the transmission assembly comprises a transmission gear, a rack and a rack guide, and the rack guide is fixed to a door body of the main door of the refrigerator, the rack guide Parallel to the guide rail, the rack is slidable along the rack rail, one end of the rack is connected to the secondary door, and the transmission gear is drivingly connected to an output shaft of the motor, and The rack is engaged.
The refrigerator according to claim 2, wherein the transmission assembly comprises a guide block, the guide block is disposed in a direction parallel to the guide rail, and two ends of the guide block are respectively provided with a first guide wheel and a second guide wheel, the motor output sleeve is provided with a driving wheel, the secondary door includes a sliding bottom plate, the sliding bottom plate is sleeved on the guiding block, and the sliding bottom plate is located at the first guiding wheel and a transmission rope is connected between the two guide wheels, and the transmission ropes are respectively located on the sliding rope a first transmission rope segment and a second transmission rope segment on both sides of the moving bottom plate, the first transmission rope segment is disposed around the first guide pulley and is wound and fixed on the driving wheel in a first direction, the first The two drive rope segments are disposed around the second guide wheel and are wound and fixed on the drive wheel in a direction opposite to the first direction.
The refrigerator according to claim 5, wherein a first guiding groove and a second guiding groove which are parallel to each other are provided along an outer circumference of the driving wheel, and the first transmission rope segment bypasses the first The guide wheel is disposed and wound and fixed in the first guiding groove in a first direction, the second driving rope segment is disposed around the second guiding wheel and is wound and fixed around the first direction Said in the second guiding groove.
The refrigerator according to any one of claims 2 to 6, wherein the driving mechanism is disposed in a door body of the main door, and an inner wall of the main door is provided at a position corresponding to the driving mechanism. A thickened layer that protrudes from the inner wall surface.
The refrigerator according to any one of claims 2 to 6, wherein the driving mechanism is disposed in a door body of the main door, and an outer surface of the driving mechanism is provided with a vacuum insulation panel.
The refrigerator according to claim 1, wherein a sealing strip is provided along an inner wall of the opening, the sealing strip is provided with a groove toward a side of the secondary door, and the groove is provided with elasticity a protrusion, the edge of the secondary door extending into the groove and squeezing the elastic protrusion when the secondary door is closed.
The refrigerator according to claim 9, wherein the outer surface of the elastic projection is flocked by flocking.
The refrigerator according to claim 1, wherein the secondary door is made of insulating glass.
The refrigerator according to claim 1, wherein the guide rail is disposed in a vertical direction, and the secondary door is slidable up and down along the guide rail.