CN110296564B

CN110296564B - A kind of refrigerator

Info

Publication number: CN110296564B
Application number: CN201910481623.8A
Authority: CN
Inventors: 李利云; 申乃雨; 陈红欣; 王仁华
Original assignee: Hisense Ronshen Guangdong Refrigerator Co Ltd
Current assignee: Hisense Ronshen Guangdong Refrigerator Co Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2021-06-22
Anticipated expiration: 2039-06-04
Also published as: CN110296564A

Abstract

The invention discloses a refrigerator, relates to the technical field of refrigeration, and aims to provide a refrigerator which can ensure the attractive appearance of the refrigerator and can be opened and closed easily and automatically by a door body. The refrigerator includes that inside is formed with the box of storeroom and the door body of setting at the opening part of storeroom, is connected with switch door gear between box and the door body, and switch door gear includes: the hinged plate is arranged on the box body and is rotationally connected with the door body through a hinged shaft; one end of the push rod is connected with the driving mechanism, the other end of the push rod is connected with the door body through a connecting column, the connecting column is located on one side, close to the box body, of the door body, and the driving mechanism is used for driving the push rod to move so as to push the door body to rotate around the hinged shaft; the guide structure is used for guiding the sliding direction of the connecting column. The refrigerator is used for improving the service performance.

Description

A kind of refrigerator

Technical Field

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

Background

Along with the improvement of the living standard of residents, the refrigerator becomes a necessary household appliance product for families, the volume of the refrigerator also begins to be continuously enlarged, the door body of the refrigerator is heavier and heavier, the refrigerator door body is aggravated, people cannot conveniently open the refrigerator door, and particularly, the old and children have a great problem that how to realize easy door opening becomes a trouble for numerous consumers and refrigerator manufacturers.

According to the refrigerator in the prior art, a door opening and closing device is adopted to realize automatic opening and automatic closing of a refrigerator door body, referring to fig. 1, an output shaft of a motor (not shown in the figure) is adopted to drive a driving gear 002 to rotate in the existing door opening and closing device, the driving gear 002 drives a driven gear 003 installed on the refrigerator door body 001 to rotate, and then the refrigerator door body 001 is driven to rotate around a hinged shaft so as to realize opening and closing of the refrigerator door body 001. The arm of force of the moment of torsion of the refrigerator door body 001 that fig. 1 shows is radius L1 of driven gear 003, because radius L1 is generally less, lead to the articulated shaft pivoted moment of torsion less, still need people's manual switch refrigerator door body sometimes, if in order to realize the light switch of refrigerator door body 001, the arm of force of the moment of torsion of multiplicable refrigerator door body 001, can corresponding increase driven gear 003's radius, the edge that will lead to driven gear 003 like this surpasss the edge of refrigerator door body 001, influence the pleasing to the eye degree of appearance of whole refrigerator, and then influence user experience and feel.

Disclosure of Invention

The embodiment of the invention provides a refrigerator, and mainly aims to provide the refrigerator which can ensure the attractive appearance of the refrigerator and can be opened and closed easily and automatically by a door body.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

the embodiment of the invention provides a refrigerator, which comprises a refrigerator body and a door body, wherein a storage chamber is formed in the refrigerator body, the door body is arranged at an opening of the storage chamber, a door opening and closing device is connected between the refrigerator body and the door body, and the door opening and closing device comprises:

the hinged plate is installed on the box body and is in rotary connection with the door body through a hinged shaft;

one end of the push rod is connected with a driving mechanism, the other end of the push rod is connected with the door body through a connecting column, the connecting column is located on one side, close to the box body, of the door body, and the driving mechanism is used for driving the push rod to move so as to drive the door body to rotate around the hinge shaft;

a guide structure for guiding a sliding direction of the connection post.

According to the refrigerator provided by the embodiment of the invention, the door opening and closing device adopts the push rod connected with the door body to push the door body to rotate around the hinge shaft, the connecting column for connecting the door body and the push rod is arranged on one side of the door body close to the refrigerator body, and meanwhile, the connecting column and the door body can be ensured to synchronously rotate around the hinge shaft through the guide structure, so that the door body can be smoothly opened and closed; the force arm of the torque of the door body is the distance from the connecting column to the hinge shaft, if the technical scheme that the driven gear installed on the door body in the prior art drives the door body to rotate is adopted, the equal force arm is required to be met, the radius of the driven gear is equal to the distance from the connecting column to the hinge shaft, and therefore the edge of the driven gear can exceed the edge of the door body, although the force arm can be increased, the appearance attractiveness of the whole refrigerator can be affected.

Drawings

Fig. 1 is a schematic structural view of a refrigerator having a door opening and closing apparatus according to the related art;

fig. 2 is a perspective view of a refrigerator having a door opening and closing apparatus according to an embodiment of the present invention;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is an exploded view of a door opening and closing device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a door opening and closing device according to an embodiment of the present invention, with a protective cover removed;

FIG. 6 is another perspective view of FIG. 5;

fig. 7 is a schematic partial structure diagram of a refrigerator according to an embodiment of the present invention;

FIG. 8 is a schematic view of the arrangement of FIG. 7 with the protective cover and hinge plate removed;

fig. 9 is a schematic diagram showing a comparative structure of a door opening and closing device according to an embodiment of the present invention and a door opening and closing device according to the prior art;

fig. 10 is a schematic structural view of a refrigerator with a closed door according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a refrigerator in a first stage in a door opening process according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a refrigerator in a second stage during the opening process of a door according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a refrigerator at a third stage in a door opening process according to an embodiment of the present invention;

fig. 14 is a functional block diagram of a control device of a refrigerator according to an embodiment of the present invention.

Detailed Description

The refrigerator according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "central", "upper", "lower", and "upper" are used herein,

The directional or positional relationships "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are indicative of those directions or positional relationships illustrated in the drawings, merely to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

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

Referring to fig. 2 and 3, an embodiment of the present invention provides a refrigerator, which includes a cabinet 1 having a storage compartment formed therein, a door 2 disposed at an opening of the storage compartment, and a refrigeration system for refrigerating the storage compartment, where in some embodiments, the storage compartment includes a freezing compartment vertically partitioned into a lower portion and an upper refrigerating compartment, and of course, the storage compartment may be arranged in other manners.

In order to realize the automatic opening and closing of the door body 2, referring to fig. 2 and 3, the refrigerator provided in the embodiment of the present invention further includes a door opening and closing device 3, the door opening and closing device 3 is connected between the door body 2 and the refrigerator body 1, and referring to fig. 4 to 8, the door opening and closing device 3 includes: a hinge plate 307, a push rod 303, a driving mechanism and a guiding structure, wherein the hinge plate 307 is installed on the box body 1, and the hinge plate 307 is rotatably connected with the door body 2 through a hinge shaft 308; one end of the push rod 303 is connected with the driving mechanism, the other end of the push rod 303 is connected with the door body 2 through a connecting column 306, the connecting column 306 is located on one side of the door body 2 close to the box body 1, and the driving mechanism is used for driving the push rod 303 to move so as to push the door body 2 to rotate around a hinge shaft 308; the guide structure is used to guide the sliding direction of the connecting post 306.

In the process of opening the door body 2, the working principle of the door opening and closing device 3 is as follows: actuating mechanism drives push rod 303 and removes towards door body 2 direction, push rod 303 will act on the thrust of door body 2 through spliced pole 306, thereby make the door body 2 rotate around articulated shaft 308 under the effect of thrust, so that the door body 2 is opened, and simultaneously, because the door body 2 is around articulated shaft 308 pivoted in-process, also can drive spliced pole 306 around articulated shaft 308 and rotate, in order to ensure that the door body 2 smoothly rotates, guide structure can make spliced pole 306 also rotate around articulated shaft 308, just so realized door body 2 and spliced pole 306 around articulated shaft 308 synchronous rotation, so that the door body 2 smoothly opens. When the door body 2 is closed, the working principle of the door opening and closing device 3 is opposite to that of the door opening and closing device 3 when the door body 2 is opened, and the description is omitted.

In the door opening and closing device 3 provided by the embodiment of the present invention, since the connecting column 306 is disposed on the side of the door body 2 close to the refrigerator body 1, and the door body 2 is driven to rotate by the movement of the push rod 303, that is, in the refrigerator provided by the embodiment, referring to fig. 9, the moment arm of the torque of the door body 2 is the distance L2 from the connecting column 306 to the hinge shaft 308, if the driven gear 003 in the prior art is adopted to drive the door body 2 to rotate, in order to satisfy the equal moment arm L2, the radius of the driven gear 003 should be L2, as is apparent from the figure, when the radius of the driven gear 003 is L2, the same door body size is adopted, compared with the door opening and closing device in the embodiment of the present invention, the edge of the driven gear 003 obviously exceeds the edge of the door body 2, so the appearance beauty degree of the whole refrigerator is reduced, and in order to avoid the phenomenon that the edge of, however, the load of the door body 2 is increased, and the torque generated by the arm of force L2 cannot easily open the door body. However, the door opening and closing device provided by the embodiment of the invention can effectively realize easy opening and closing of the door body 2 by increasing the force arm under the condition of ensuring the attractive appearance of the refrigerator.

The guide structure has various implementations, and in some embodiments, referring to fig. 4, 6 and 8, the guide structure includes a guide groove 305 formed at one end of the push rod 303 close to the door body 2, and the connecting column 306 passes through the guide groove 305 to be connected to the door body 2, and in the case that the door body 2 rotates around the hinge shaft 308, the connecting column 306 can slide along the guide groove 305, and the extending direction of the guide groove 305 is parallel to the length direction P1 of the door body 2. In other embodiments, a sliding groove is formed in the position of the door body 2 close to the push rod 303, the extending direction of the sliding groove is consistent with the length direction P1 of the door body 2, a guide rod is arranged at one end of the push rod 303 close to the door body 2, the guide rod extends into the sliding groove, and the guide rod can slide along the sliding groove during the opening and closing of the door body 2. The two embodiments can avoid the door body 2 from being locked in the rotating process, when the second embodiment is adopted, a sliding groove needs to be arranged on one side of the door body 2 opposite to the refrigerator body 1, and compared with the method that the guide groove 305 is arranged at the end part of the push rod 303, the second embodiment can increase the complexity of the refrigerator processing technology, so that the guide structure shown in fig. 4, 6 and 8 is preferred in the application.

When the door body 2 and the push rod 303 adopt the guide structure as shown in fig. 4, the specific working process is as follows: referring to fig. 10 (the hinge shaft connecting the door body 2 and the cabinet 1 is located on the right side of the door body 2), the door body 2 is in a closed state, the push rod 303 is also in an initial position, the connecting column 306 is located at the rightmost end of the guide groove 305 (in addition, when the hinge shaft connecting the door body 2 and the cabinet 1 is located on the left side of the door body 2, the connecting column 306 is located at the leftmost end of the guide groove 305), fig. 11 to 12, the door body 2 is gradually opened, in the process of opening the door body 2, the driving mechanism drives the push rod 303 to move towards the door body 2, further, the door body 2 is pushed to rotate around the hinge shaft 308, and the connecting column 306 slides towards the left along the guide groove 305 and finally slides to the leftmost end of the guide groove 305, fig. 12 to 13, the door body 2 continues to be opened, in the process of continuing to open the door body 2, the driving mechanism continues to drive the push, and the connecting column 306 moved to the leftmost end of the guide groove 305 moves rightward along the guide groove 305, and when the connecting column 306 slides to the rightmost end of the guide groove 305, the door body 2 stops rotating.

In specific implementation, the length of the guide groove 305 is designed according to the maximum angle at which the door body 2 rotates, and the length of the guide groove 305 is not limited herein.

In order to further facilitate the opening of the door body 2, the axis of the connecting column 306 is parallel to the axis of the hinge shaft 308, so that the pushing force generated during the movement of the pushing rod 303 can be maximally transferred to the door body 2, so that the door body 2 can rotate around the hinge shaft 308 more smoothly and stably.

In order to further increase the moment arm value, referring to fig. 8, a protruding portion 501 is disposed on one side of the door body 2 close to the cabinet 1, a mounting hole for mounting the connecting column 306 is opened on the protruding portion 501, and the connecting column 306 passes through the guide groove 305 and is mounted in the mounting hole. The bulge 501 is arranged between the door body 2 and the box body 1, and on the premise that the door body 2 cannot interfere with the box body 1 in the rotating process, the distance between the box body 2 and the door body 1 is fully utilized, so that the force arm is increased, and the door body is further opened and closed easily.

The driving mechanism has various implementations, in some embodiments, referring to fig. 8, an extending direction of the push rod 303 is parallel to a width direction P2 of the box body, a driving tooth 304 is arranged on the push rod 303 along the extending direction, the driving mechanism includes a driving motor 301 and a gear set, the gear set includes a plurality of driving gears 302 which are meshed in sequence, the driving gear 302 at an input end of the gear set is connected with an output shaft of the driving motor 301, and the driving gear 302 at an output end of the gear set is meshed with the driving tooth 304 on the push rod 303. In other embodiments, the push rod 303 is provided with a driving gear along the extending direction thereof, and the driving mechanism comprises a driving motor and a driving gear arranged on the output shaft of the driving motor, and the driving gear is meshed with the driving gear on the push rod. Compared to the driving mechanism shown in fig. 8, the driving mechanism shown in fig. 8 includes at least two transmission gears 302, which is advantageous in that: usually, the output shaft of the driving motor has higher rotating speed, but the output torque is smaller, and the output torque can be increased and the rotating speed can be reduced by adopting a plurality of transmission gears which are meshed in sequence, so that the torque of the door body 2 is finally improved, and the door body can be opened easily. Therefore, the driving mechanism shown in fig. 8 is preferable.

In specific implementation, the number of the transmission gears in the gear set and the transmission ratio of the two engaged transmission gears can be determined according to the output torque of the driving motor and the torque of the hinge shaft. The specific number of gears and the gear ratio are not limited herein.

According to the refrigerator provided by the embodiment of the invention, when the driving motor 301 is electrified, the driving motor 301 can drive the transmission gear 302 to rotate, and finally the push rod 303 is driven to move; if the door body 2 needs to be opened or closed, but when the driving motor 301 is not powered on, the door body 2 needs to be opened or closed manually, and when the door body 2 is pulled manually, the large transmission resistance between the output shaft of the driving motor 301 and the transmission gear 302 at the input end of the gear set needs to be overcome, so that when the driving motor 301 is not powered on, and the door body 2 is opened or closed manually, the physical strength is consumed, and the user experience is obviously reduced.

In order to overcome the inconvenience caused by the fact that the driving motor 301 is not electrified, in some embodiments, the output shaft of the driving motor 301 is connected with the transmission gear 302 at the input end of the gear set through the clutch, when the driving motor 301 and the clutch are powered off, the clutch prevents the transmission gear 302 at the input end of the gear set from driving the output shaft of the driving motor 301 to rotate, and when the driving motor 301 and the clutch are powered on, the driving motor 301 drives the transmission gear 302 at the input end of the gear set to rotate through the clutch. That is to say, when the driving motor 301 and the clutch are powered off, the pulling force for pulling the door body 2 is not transmitted to the output shaft of the driving motor 301, so that the transmission resistance transmitted to the driving motor 301 by the transmission gear 302 at the input end of the gear set is not needed to be overcome, and the physical force for pulling the door body is reduced.

The clutch has various structures, for example, the clutch comprises two friction plates arranged inside, and the two friction plates are separated when power is off and attached when power is on. The specific working process is as follows: when the driving motor 301 and the clutch are powered on, two friction plates in the clutch are attached, and an output shaft of the driving motor 301 drives the transmission gears which are sequentially meshed to rotate, so that the push rod 303 is driven to move, and the door body 2 is opened or closed; when the driving motor 301 and the clutch are powered off, the two friction plates in the clutch are separated, and when the door body 2 is pulled manually, the two friction plates in the clutch are separated, so that the torque of the transmission gear cannot be transmitted to the output shaft of the driving motor, the pulling force or the pushing force acting on the door body 2 can be reduced, and the door body can be opened and closed easily. Therefore, the refrigerator provided by the embodiment of the invention can be used for easily opening and closing the door body when the driving motor is electrified and can be used for easily opening and closing the door body when the driving motor is not electrified.

Referring to fig. 5, the driving motor 301 and the transmission gear 302 may also be mounted on the hinge plate 307, that is, the hinge plate 307 provides a mounting position for the driving motor 301 and the transmission gear 302, so that a mounting plate for mounting the driving motor 301 and the transmission gear 302 need not be separately provided, and the structure of the opening and closing door apparatus is simplified.

When the transmission gear 302 and the driving motor 301 are installed on the hinge plate 307, since the transmission gear 304 on the push rod 303 needs to be engaged with the transmission gear at the output end of the gear set, the push rod 303 can be slidably installed on the hinge plate 307, however, the push rod 303 is continuously moved back and forth during the opening and closing of the door body 2, in order to ensure the smooth movement of the push rod 303, referring to fig. 4 and 6, the hinge plate 307 comprises an upper plate segment 3071 and a lower plate segment 3072 which are arranged up and down, and a transition segment 3073 which connects the upper plate segment 3071 and the lower plate segment 3072, the lower plate segment 3072 is installed on the cabinet 1, the hinge shaft 308 is arranged below the upper plate segment 3071 and connected with the door body 2, the guide groove 305 at the end of the push rod 303 is positioned below the upper plate segment 3071, the upper plate segment 3071 is close to the door body 2, the driving motor 301 and the transmission gear 302 are installed on the lower plate segment 3072, and after the hinge shaft 308, a placing cavity is formed between the door body 2 and the upper bending section 3071, the guide groove 305 on the push rod 303 is located in the placing cavity, the connecting column 306 connected with the door body 2 is inserted into the guide groove 305, and the part of the push rod 303 extending into the placing cavity can move back and forth in the placing cavity, so that the space position between the door body 2 and the box body 1 is fully utilized, and the appearance structure is neat and compact.

Referring to fig. 2 and 3, the door opening and closing device 3 is located above the box body 1, a protective cover 309 having a mounting cavity therein is disposed above the box body 1, and the push rod 303, the hinge plate 307 and the driving mechanism are disposed in the mounting cavity. Thus, the appearance attractiveness of the whole refrigerator can be improved.

In the art, in order to improve the refrigeration effect of the storage chamber, a door seal is usually arranged at a position where the door body 2 contacts the refrigerator body 1, and the attraction force of the door seal is relatively large, if the door body 2 is opened only by using the door opening and closing device 3, the door body 2 is opened at a relatively slow speed, and in order to destroy the attraction force of the door seal, the opening speed of the door body 2 is increased, in some embodiments, referring to fig. 10, the refrigerator provided in the embodiments of the present invention further includes an auxiliary door opening and closing device 4, the auxiliary door opening and closing device 4 is arranged at a side of the refrigerator body 1 far from the hinge shaft 308, and the auxiliary door opening and closing device 4 is used for pushing the door body 2 open, that is, the auxiliary door opening and closing device 4 is arranged at.

Referring to fig. 10 to 11, when the door body 2 is to be opened, firstly, the auxiliary door opening and closing device 4 operates to open the door body 2 until α is 10 ° to 12 ° α, which is the rotation angle of the door body 2, and then the door opening and closing device 3 continues to open the door body 2, and the auxiliary door opening and closing device 4 has the advantages that: if only there is the door opening and closing device 3, and the door opening and closing device 3 sets up the position department at the handle of keeping away from the door body, when the door body 2 just opened, owing to need destroy the great actuation force of door seal, just so need the articulated shaft to have very big moment of torsion, just can destroy the actuation force of the door seal between the door body 2 and the box 1 to make the door body 2 open, if adopt the supplementary door opening and closing device 4 that is close to handle position department, just so greatly increased the arm of force of articulated shaft pivoted moment of torsion, just so easy actuation force with the door seal destroys, open the door body with light.

The auxiliary door opening and closing device 4 has various structures, for example, the auxiliary door opening and closing device 4 comprises an ejector rod and an auxiliary driving motor for driving the ejector rod to move so as to push the door body 2 open, a driving wheel is mounted on an output shaft of the auxiliary driving motor, meshing teeth are arranged on the ejector rod, the driving wheel is meshed with the meshing teeth, the auxiliary driving motor drives the driving wheel to rotate, and the driving wheel is meshed with the meshing teeth on the ejector rod to drive the ejector rod to move towards the door body so as to push the door body open; for another example, the auxiliary door opening and closing device includes a telescopic cylinder, and a free end of the telescopic cylinder faces the door body, i.e., the door body is pushed to open by the extension of the telescopic cylinder. Compared with a telescopic cylinder, the auxiliary door opening and closing device provided by the first embodiment has stable and continuous thrust acting on the door body, so that the door body is stable in the rotating process.

In order to improve the intelligent operation of the refrigerator, in some embodiments, referring to fig. 14, the refrigerator further includes a transmitter for transmitting a switching signal that can switch the door 2 to the receiver, a receiver for receiving the switching signal transmitted by the transmitter, and a control device for controlling the driving mechanism to drive the door 2 to switch according to the switching signal. That is to say, when the transmitter is to the signal of receiver transmission for the switch door body, controlling means just can be according to signal command control actuating mechanism in order to open and close the door body, and then realize the automatic switch of the door body, can further improve the experience of refrigerator like this and feel.

The switch signal transmitted by the transmitter comprises a sound signal, a gesture signal or a touch signal. For example, a sound signal with a certain range of decibels may be set, for example, a sound with a decibel of 20dB to 30 dB; fixed gesture signals, which can be set by the user according to personal preferences; a pressure sensor may be installed on the refrigerator, and when the pressure sensor receives a pressing force applied by a user, the control device controls the opening and closing of the door body 2.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A refrigerator, includes the inside box that is formed with the storeroom and sets up and be in the door body of the opening part of storeroom, the box with be connected with the door opening and closing device between the door body, its characterized in that, the door opening and closing device includes:

a guide structure for guiding a sliding direction of the connection column;

the guide structure is fixedly connected with the push rod and is in sliding connection with the connecting column; the connecting column is connected with the door body.

2. The refrigerator of claim 1, wherein the guide structure comprises: set up being close to of push rod the guide way of the one end of the door body, the spliced pole passes the guide way with door body coupling, just the door body winds under the articulated shaft pivoted condition, the spliced pole can be followed the guide way slides, the extending direction of guide way is on a parallel with the length direction of box.

3. The refrigerator according to claim 2, wherein a protrusion is disposed on one side of the door body close to the refrigerator body, the protrusion is provided with a mounting hole for mounting the connecting column, and the connecting column passes through the guide groove and is mounted in the mounting hole.

4. The refrigerator as claimed in claim 2, wherein the hinge plate includes an upper plate section and a lower plate section arranged up and down, and a transition section connecting the upper plate section and the lower plate section, the lower plate section is installed on the cabinet, the hinge shaft is provided under the upper plate section and connected to the door body, the push rod is slidably provided on the lower plate section, and the guide groove of the end of the push rod is provided under the upper plate section.

5. The refrigerator according to claim 1, wherein an axis of the hinge shaft is parallel to an axis of the connection column.

6. The refrigerator as claimed in claim 1, wherein the extension direction of the push rod is parallel to the width direction of the refrigerator body, the push rod has a driving gear arranged along the extension direction thereof, the driving mechanism comprises a driving motor and a gear set, the gear set comprises a plurality of sequentially meshed driving gears, the driving gear at the input end of the gear set is connected with the output shaft of the driving motor, and the driving gear at the output end of the gear set is meshed with the driving gear on the push rod.

7. The refrigerator as claimed in claim 6, wherein an output shaft of the driving motor is connected to the driving gear of the input end of the gear set through a clutch, the clutch prevents the driving gear of the input end of the gear set from driving the output shaft of the driving motor to rotate in case the driving motor and the clutch are powered off, and the driving motor drives the driving gear of the input end of the gear set to rotate through the clutch in case the driving motor and the clutch are powered on.

8. The refrigerator as claimed in claim 1, wherein the door opening and closing device is located above the cabinet, a protective cover having a mounting chamber therein is provided above the cabinet, and the push rod, the hinge plate and the driving mechanism are provided in the mounting chamber.

9. The refrigerator of claim 1, further comprising an auxiliary door opening and closing device provided at a side of the cabinet away from the hinge shaft, the auxiliary door opening and closing device being for pushing the door body open.

10. The refrigerator according to claim 9, wherein the auxiliary door opening and closing device comprises a push rod and an auxiliary driving motor for driving the push rod to move so as to push the door body open, an output shaft of the auxiliary driving motor is provided with a driving wheel, the push rod is provided with engaging teeth, and the driving wheel is engaged with the engaging teeth.