CN112747545A - Automatic door opening device and refrigerator - Google Patents

Abstract

The invention relates to an automatic door opening device which comprises a base, a pushing piece, a transmission piece and a driving piece. The transmission part comprises at least one rack and a gear meshed with the rack. The gear drives the rack to move towards the household appliance door body under the action of the driving force and pushes the household appliance door body open through the pushing piece. The invention also relates to a refrigerator comprising the device. The automatic door opening device provided by the invention uses the gear rack as a transmission part, and solves the problems of poor stability, high noise and large occupied space in the transmission process of a plurality of groups of transmission wheels in the prior art.

Description

Automatic door opening device and refrigerator

Technical Field

The invention belongs to the technical field of refrigeration equipment, and particularly relates to an automatic door opening device and a refrigerator.

Background

With the improvement of living standard, intelligent household appliances are increasingly popular and accepted in the market. At present, a user tends to a refrigerator with a large volume, but the suction force of a refrigerator door seal with the large volume is also large, and the use experience of the user is improved by an automatic door opening device.

However, the conventional electric door opening refrigerator generally converts the driving force of the driving motor into the driving force of the refrigerator door body through a plurality of groups of transmission assemblies, but the plurality of groups of transmission assemblies occupy a large space, and in the using process or after a period of use, the engagement between the transmission members is unstable or the engagement process is misplaced and blocked, so that the service life of the electric door opening device is influenced. In addition, the transmission assemblies generate large noise in the transmission process. So need improve automatic door opener's drive assembly, optimize its structural design, design a neotype automatic door opener, refrigerator and solve above-mentioned problem.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the automatic door opening device and the refrigerator, which adopt the gear and the rack as transmission parts, so that the automatic door opening device has high stability, low noise and small occupied space in the automatic door opening process.

The invention provides an automatic door opening device, which is used for automatically opening a door body of a household appliance, and comprises: the base is fixed at the upper end of the household appliance box body; the pushing piece is used for pushing the door body of the household appliance; the driving piece is fixed in the base and provides driving force; the transmission piece is used for converting the driving force provided by the driving piece into the driving force of the pushing piece; the transmission piece comprises at least one rack and a gear meshed with the rack; the gear drives the rack to move towards the household appliance door body under the action of the driving force and pushes the household appliance door body open through the pushing piece.

In one embodiment, the transmission member comprises a first rack and a second rack, and the plane of the first rack is parallel to the plane of the second rack; the gear drives the first rack or the second rack to move towards the household appliance door body respectively under the action of the driving force and pushes the household appliance door body open through the pushing piece.

In one embodiment, the transmission member comprises a first rack and a second rack, and the plane of the first rack is not parallel to the plane of the second rack; the gear drives the first rack or the second rack to move towards the household appliance door body respectively under the action of a driving force so as to push the household appliance door body open.

In one embodiment, the output end of the driving piece is provided with a pair of bevel gears which are meshed with each other, and the bevel gears comprise a female bevel gear and a male bevel gear, wherein the output end of the driving piece is connected with the female bevel gear, and the male bevel gear is connected with the gear; the driving piece drives the female bevel gear to rotate, and the female bevel gear converts the driving force of the driving piece into the driving force of the sub bevel gear; the sub-bevel gear and the gear rotate around the central shaft, and the gear drives the rack to push the pushing piece to move towards the direction of the household appliance door body so as to open the household appliance door body.

In one embodiment, the rack-and-pinion type rack-and.

In one embodiment, the push piece further comprises a limit switch, the limit switch is arranged between the push piece and the base, the limit switch is used for detecting the position of the rack relative to the base, and when the rack exceeds a preset maximum movement length, the driving piece receives a command to stop rotating or reversely rotating.

In one embodiment, the pushing member further comprises an interference part, and the interference part is an extension part arranged at the front end of the pushing member or an extension part arranged on one side surface of the pushing member.

In one embodiment, the driving device further comprises a housing buckled with the base, an installation space is formed between the base and the housing, and the driving element are fixed in the installation space.

In one embodiment, at least two pairs of fixing lugs are arranged on the side edge of the shell, and the fixing lugs are fixed at the upper end of the household appliance box body through fixing pieces.

In one embodiment, the casing is provided with a through hole for the pushing piece to move towards the door body of the household appliance.

In one embodiment, the refrigerator comprises a refrigerator body and a door body; the box body comprises the automatic door opening device which is used for opening and closing the door body on the box body in an attracting mode.

In one embodiment, the automatic door opening device includes two pushing members, and one end of each pushing member is respectively used for abutting against and opening a door body attracted to the box body.

In one embodiment, the automatic door opening device is arranged at the top or the bottom of a refrigerator body. Compared with the prior art, the invention has the beneficial effects that:

the invention provides an automatic door opening device which comprises a base, a pushing piece, a transmission piece and a driving piece. The transmission part comprises at least one rack and a gear meshed with the rack. The gear drives the rack to move towards the household appliance door body under the action of the driving force and pushes the household appliance door body open through the pushing piece. The invention also relates to a refrigerator comprising the automatic door opening device. The invention has simple and ingenious structure and reasonable design, and adopts the gear and the rack as transmission parts, thereby having high stability, low noise and small occupied space. In addition, the output end of the driving piece is provided with a group of bevel gears, so that the driving force of the driving piece is stably transmitted to the gears.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic external view of an automatic door opener according to an embodiment of the present invention;

FIG. 2 is a schematic view of a rack structure inside an automatic door opener according to an embodiment of the present invention;

FIG. 3 is a schematic view of an embodiment of the present invention showing the structure of two racks inside the automatic door opener;

FIG. 4 is a schematic view of an engaging structure of the driving member and the driving member according to an embodiment of the present invention;

FIG. 5 is a schematic view of the overall structure of the refrigerator according to the present invention;

shown in the figure:

200. a refrigerator: 2. the device comprises a driving piece 21, an output end 3, a transmission piece 30, a rack 31, a gear 32, a sub bevel gear 33, a female bevel gear 34, a central shaft 35, a first rack 36 and a second rack;

200. a refrigerator: 100. an automatic door opening device 201, the upper end of a refrigerator 202 and a refrigerator door body;

100. automatic door opener: 11. shell, 12, base, 131, fixed ear, 141, 142, through-hole.

Detailed Description

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, which will enable those skilled in the art to practice the present invention with reference to the accompanying specification. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

Referring to fig. 1 to 5, fig. 1 is a schematic external view illustrating an automatic door opener according to an embodiment of the present invention; FIG. 2 is a schematic view of a rack structure inside an automatic door opener according to an embodiment of the present invention; FIG. 3 is a schematic view of an embodiment of the present invention showing the structure of two racks inside the automatic door opener; FIG. 4 is a schematic view of an engaging structure of the driving member and the driving member according to an embodiment of the present invention; fig. 5 is a schematic view of the overall structure of the refrigerator according to the present invention.

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

Example one

As shown in fig. 2 to 4, an automatic door opening apparatus 100 for automatically opening a door of an electric appliance, the electric appliance being a refrigerator, a washing machine, a microwave oven, etc. In one embodiment, the appliance is embodied as a refrigerator. The automatic door opening device 100 includes a base 12, the base 12 being fixed to an upper end 201 of a refrigerator 200; the base 12 is disposed at an arbitrary position of the upper end 201 of the refrigerator. Preferably in the middle of the upper end 201 of the refrigerator. And the pushing piece is used for pushing the door body 202 of the refrigerator.

A driving member 2, wherein the driving member 2 is a low-speed motor in one embodiment, in order to ensure large output torque, low rotation speed, smooth operation, and small volume and weight of the driving member. The low-speed motor comprises a motor body and an output shaft 21 protruding outwards from the motor body. The working principle of the low-speed motor is as follows: one end of the output shaft 21 of the motor body is fixedly connected with the low-speed rotor, and the low-speed rotor and the flexible gear are transmitted by the internal gear and rotate at a low speed together. The rigid wheel is rigidly connected with the machine body and forms a pair of internal gear transmission pairs with the flexible wheel. The outer ring of the harmonic generator is a flexible bearing, is installed in the flexible gear and is fixedly connected with the high-speed rotor, when the harmonic generator runs with the high-speed rotor at a high speed, the flexible bearing also runs in the flexible gear, and the flexible gear is forced to run in an elliptic shape by the harmonic generator because an elliptic wheel disc with the difference of long and short axes of about 2mm is installed in the flexible bearing; the teeth on the long axis of the ellipse in the flexible gear are meshed with the teeth on the rigid gear, and the required large reduction ratio can be obtained by utilizing the difference of the number of the teeth of the pair of meshed gears of the rigid gear and the flexible gear, so that the low-speed operation of the flexible gear is realized. The flexible gear drives the low-speed rotor and the output shaft to rotate stably at low speed. The motor body is further provided with a power line and a signal line (not shown) connected to an external power source. The external power source may be a conventional battery, such as a size 5 battery. In addition, the refrigerator can also provide electric energy for the automatic door opening device, namely, a power line is directly led out from the interior of the refrigerator. The other end of the driving member output shaft 21 is connected with a pair of mutually meshed bevel gears.

And the transmission piece 3 is used for converting the driving force provided by the driving piece 2 into the pushing force of the pushing piece. The transmission member 3 includes at least one rack. The number of racks can be determined according to the number of objects needing to be pushed. In one embodiment, as shown in fig. 2, the transmission member includes a rack 30, and the rack 30 moves toward the refrigerator door under the driving force to push the refrigerator door open by the pushing member. In another embodiment, as shown in fig. 3, the transmission member 3 comprises a first rack 35 and a second rack 36, the first rack 35 and the second rack 36 extending along two sides of the base 12. At this time, the driving member 2 is a bidirectional motor, and the driving gear 31 is driven to drive the rack 30 to move by outputting driving forces in different directions. The bidirectional motor comprises a motor body, an output shaft 21 protruding outwards from the motor body and a female bevel gear 33 connected with the output shaft 21. The motor body is further provided with a power cord (not shown) connected to an external power source. The external power source may be a conventional battery, such as a size 5 battery. In addition, the refrigerator can also provide electric energy for the automatic door opening device, namely, a power line is directly led out from the interior of the refrigerator. When the plane of the first rack 35 is parallel to the plane of the second rack 36, the ends of the first rack 35 and the second rack 36 respectively correspond to the door body of the refrigerator. When the plane of the first rack 35 and the plane of the second rack 36 are not parallel, that is, when the extension ends of the planes of the first rack 35 and the second rack 36 are intersected, the tail ends of the extension lines of the first rack 35 and the second rack 36 respectively correspond to the door body of the refrigerator, at this time, for the racks with the same length, the length of the base required by the racks which are not parallel is shorter, and under the condition that the consumable materials of the racks are the same, the consumable materials of the base required under the condition are less.

When the transmission piece has only one rack, the automatic door opener has only one pushing piece corresponding to the rack. In one embodiment, when the drive member comprises a first rack 35 and a second rack 36, the pusher members comprise first and second pusher members corresponding thereto. The first pushing member and the first rack 35 are provided in pairs, and the second pushing member and the second rack 36 are provided in pairs. The pushing members are arranged at the front ends of the first rack 35 and the second rack 36 in one embodiment, namely, at the side close to the refrigerator door body 202. In another embodiment, the pushing member is provided on the base 12 and outside the first rack 35 and the second rack 36, and the pushing member extends in the direction of the first rack 35 and the second rack 36. The pusher and the first rack 35 or the second rack 36 may be provided separately, and the pusher and the first rack 35 or the second rack 36 may be integrally formed, i.e., the first rack 35 is the first pusher and the second rack 36 is the second pusher. In one embodiment, the pushing member is confined within the base 12 when the end of the pushing member near the refrigerator door 202 does not extend beyond the base 12, to ensure that the pushing member is not visible to the user when the door is not automatically opened. In another embodiment, the end of the pushing member close to the refrigerator door 202 extends beyond the base 12, so that the length of the pushing member is not too long, and the cost is saved.

The pushing piece also comprises an abutting part which is an extension part arranged at the front end of the pushing piece or an extension part arranged on one side surface of the pushing piece. When the abutting part is an extension part arranged at the front end of the pushing part, the extension part is a boss which is rectangular, square, circular and the like. When the collision part is an extension part arranged on one side surface of the pushing piece, the length of the extension part is longer than that of the pushing piece main body, so that the refrigerator door body can be opened through the extension part in the refrigerator door opening process. In order to prevent the pushing member from damaging the refrigerator door body 202, the front end of the abutting portion is preferably provided in an arc shape. The outside of the pusher may in one embodiment be provided with a protective casing such as a rubber sleeve.

In one embodiment, an elastic damping member (not shown) is disposed between the pusher and the base 12. Namely a first elastic damping member between the first pushing member and the base 12 and a second elastic damping member disposed between the second pushing member and the base 12. When the driving part 2 stops outputting or changes direction, the first pushing part or the second pushing part is pulled back into the mounting space of the base 12 through the first elastic damping part or the second elastic damping part, and user experience is improved.

In one embodiment, a limit switch (not shown) is disposed between the pusher and the base 12. Namely a first limit switch between the first pushing member and the base 12 and a second limit switch arranged between the second pushing member and the base 12. In one embodiment, a limit switch is arranged at any position of the rack, the limit switch can be a position sensor, when the refrigerator door is opened, the limit switch detects the position of the rack relative to the base to judge whether the current movement length of the rack exceeds the preset maximum movement length, and when the rack exceeds the preset maximum movement length, the driving piece receives a command to stop rotating or reversely rotating.

One end of the driver output shaft 21 is connected to a pair of intermeshing bevel gears. The bevel gears are indexing cones, addendum cones, dedendum cones and base cones. The bevel gears include a female bevel gear 33 and a male bevel gear 32, and the female bevel gear 33 realizes the transmission of motion and power between two intersecting axes through the engaged male bevel gear 32. The female and male bevel gears 33 and 32 form an intersection angle between axes, which is 90 ° in one embodiment, so that a pair of bevel gears converts a driving force in a vertical direction into a driving force in a horizontal direction. In another embodiment, the intersection angle is not equal to 90 °. The transmission member 3 includes a rack 30 and a gear 31 engaged with the rack 30, the gear 31 is provided with a central shaft 34, and the gear 31 and the sub bevel gear 32 rotate around the central shaft 34. The sub bevel gear 32 and the gear 31 are fixedly connected by a pin connection, a key connection, or other fixing connection means easily conceived by those skilled in the art. Wherein the output end 21 of the driver 2 is connected to the female bevel gear 33. The driver 2 drives the female bevel gear 33 to rotate, and the female bevel gear 33 converts the driving force of the driver 2 into the driving force of the female bevel gear 32. Because the sub-bevel gear 32 is fixedly connected with the gear 31, the sub-bevel gear 32 and the gear 31 rotate around the central shaft 34, and the gear 31 drives the rack 30 to push the pushing piece to move towards the direction of the household appliance door body so as to open the household appliance door body through the pushing piece. The cooperation through bevel gear guarantees that the conversion of drive power is more stable, and the noise is less, required base space is littleer.

When there is more than one rack of the transmission member, the gear 31 drives the first rack 35 or the second rack 36 to move toward the refrigerator door 202 according to the driving direction of the driving member 2, so as to push the doors on both sides of the refrigerator respectively. When the driving piece 2 drives the gear 31 to rotate clockwise, the gear 31 drives the second rack 36 to push the pushing piece to move towards the refrigerator door body 202 so as to open the refrigerator door body through the pushing piece; when the driving member drives the gear 31 to rotate counterclockwise, the gear drives the first rack 35 to push the pushing member to move toward the refrigerator door body 202 so as to open the refrigerator door body through the pushing member.

Example two

As shown in fig. 1, the automatic door opening device 100 includes a base 12 and a housing 11 fastened to the base. An installation space is formed between the base 12 and the housing 11, and the driving member 2 and the transmission member 3 are fixed in the installation space. At least two pairs of fixing lugs 131 are arranged on the side edge of the shell. The fixing lugs are arranged in a direction perpendicular to the outer case 11 and parallel to the upper end 201 of the refrigerator. In one embodiment, the securing ears are hollow, U-shaped. The fixing lugs are scattered around the shell 11 and fixed at the upper end 201 of the refrigerator body through fixing pieces. The fixing piece is a fixing part corresponding to a fixing mode common to the technical personnel in the field, such as a screw. The housing 11 is further provided with a plurality of positioning holes for positioning and installation. The shell 11 is provided with a through hole for the pushing piece to move towards the door body 202 of the refrigerator, and the shape of the through hole is consistent with that of the end part of the pushing piece. In an embodiment, a first through hole and a second through hole for the first pushing member and the second pushing member to protrude outward are formed between the housing 11 and the base 12, and one end of the first pushing member and the one end of the second pushing member protruding outward at the initial position are flush with the openings of the first through hole and the second through hole. The through hole is in one embodiment provided in the housing 11, and in another embodiment the base 12 and the housing 11 together form the through hole.

EXAMPLE III

As shown in fig. 5, in an embodiment of a household appliance, a refrigerator 200, the refrigerator 200 includes a cabinet for forming an enclosed space in the refrigerator and a door disposed at a front side of the refrigerator. The upper end of the refrigerator body is a refrigerator upper end 201, and the refrigerator body is provided with a door body 202 which is arranged on the front side of the refrigerator body and used for opening or closing. The box body comprises the automatic door opening device which is used for opening and closing the door body on the box body in an attracting mode.

One end of a pushing piece of an automatic door opening device 100 corresponds to a door body on one side of a refrigerator. When the refrigerator is a single-door refrigerator, one end of the pushing piece of the automatic door opening device 100 is used for abutting against and opening a door body sucked on the refrigerator body, namely, the tail end of the pushing piece corresponds to the door body of the refrigerator so as to open the door body under the action of driving force. When the refrigerator is a double-door refrigerator, the automatic door opening device 100 includes two pushing members, one end of each pushing member is respectively used for abutting against and opening a door body sucked on the refrigerator body, that is, the tail end of each pushing member respectively corresponds to the door bodies on two sides of the refrigerator so as to respectively open the door bodies on two sides of the refrigerator under the action of driving force.

The automatic door opening device 100 is disposed at the top or bottom of the refrigerator body to abut against the side edge of the door body by a pushing member. When the automatic door opener is arranged at the top end of the refrigerator body, the automatic door opener is convenient to install and maintain; the automatic door opener can also be arranged at the bottom of the refrigerator body, and the use experience of customers can be improved after the automatic door opener is hidden.

As shown in fig. 1 to 5, in one embodiment, the refrigerator 200 includes a cabinet and a door disposed at a front side of the cabinet. The automatic door opening device 100 is installed at an upper end 201 of the refrigerator. The base 12 is fixed to the upper end 201 of the refrigerator 200. The base 12 is provided with a driving member 2 and a transmission member 3. The transmission member 3 includes a rack 30, and a gear 31 engaged with the rack 30. The output end 21 of the driving member 2 is provided with a pair of bevel gears which are meshed with each other, the bevel gears comprise a female bevel gear 33 and a male bevel gear 32, and the output end 21 of the driving member is connected with the female bevel gear 33. The gear 31 and the sub bevel gear 32 are rotated about the central shaft 34 by a driving force. The driver 2 drives the female bevel gear 33 to rotate, and the female bevel gear 33 converts the driving force of the driver 2 into the driving force of the female bevel gear 32. The sub-bevel gear 32 and the gear 31 rotate around the central shaft 34, so that the rack 30 is driven to move towards the refrigerator door body 202 to push the refrigerator door body through the pushing piece.

In one embodiment, the transmission member 3 comprises a first rack 35 and a second rack 36. When the driving piece 2 drives the gear to rotate clockwise, the gear 31 drives the second rack 36 to push the pushing piece to move towards the refrigerator door body 202 so as to open the door body of the refrigerator; when the driving part 2 drives the gear 31 to rotate counterclockwise, the gear 31 drives the first rack 35 to push the pushing part to move towards the refrigerator door body 202 so as to open the refrigerator door body.

The automatic door opening device is simple in structure and reasonable in design, and the gears and the racks are used as transmission parts, so that the automatic door opening device is high in stability, low in noise, small in occupied space, capable of meeting the requirements of higher user experience, and convenient to popularize and apply.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those skilled in the art can readily practice the invention as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.

Claims (13)

1. The utility model provides an automatic door opener for automatically, open the door body of household electrical appliances, its characterized in that includes:

the base is fixed at the upper end of the household appliance box body;

the pushing piece is used for pushing the door body of the household appliance;

the driving piece is fixed in the base and provides driving force;

the transmission piece is used for converting the driving force provided by the driving piece into the driving force of the pushing piece;

the transmission piece comprises at least one rack and a gear meshed with the rack; the gear drives the rack to move towards the household appliance door body under the action of the driving force and pushes the household appliance door body open through the pushing piece.

2. An automatic door opener according to claim 1, in which said drive member comprises a first rack and a second rack, said first rack lying in a plane parallel to the plane of said second rack; the gear drives the first rack or the second rack to move towards the household appliance door body respectively under the action of the driving force and pushes the household appliance door body open through the pushing piece.

3. An automatic door opener according to claim 1, in which said drive member comprises a first rack and a second rack, the plane of said first rack being non-parallel to the plane of said second rack; the gear drives the first rack or the second rack to move towards the household appliance door body respectively under the action of a driving force so as to push the household appliance door body open.

4. The automatic door opener according to claim 1, wherein the output end of the driving member is provided with a pair of bevel gears engaged with each other, the bevel gears including a female bevel gear and a male bevel gear, wherein the output end of the driving member is connected to the female bevel gear and the male bevel gear is connected to the gear; the driving piece drives the female bevel gear to rotate, and the female bevel gear converts the driving force of the driving piece into the driving force of the sub bevel gear; the sub-bevel gear and the gear rotate around the central shaft, and the gear drives the rack to push the pushing piece to move towards the direction of the household appliance door body so as to open the household appliance door body.

5. The automatic door opener according to claim 1, further comprising an elastic damping member disposed between the pushing member and the base, the rack being drawn back to the installation space of the base by the elastic damping member.

6. The automatic door opener according to claim 1, further comprising a limit switch disposed between the pushing member and the base, the limit switch being configured to detect a position of the rack relative to the base, the driving member receiving a command to stop or reverse the rotation when the rack exceeds a predetermined maximum movement length.

7. The automatic door opener according to claim 1, wherein said pushing member further comprises an interference portion, said interference portion being an extension provided at a front end of the pushing member or an extension provided at a side of the pushing member.

8. The automatic door opening device according to claim 1, further comprising a housing engaged with the base, wherein an installation space is formed between the base and the housing, and the driving member are fixed in the installation space.

9. The automatic door opener according to claim 8, wherein the side edges of the housing are provided with at least two pairs of fixing lugs, and the fixing lugs are fixed to the upper end of the cabinet of the electric appliance by fixing members.

10. The automatic door opener according to claim 8, wherein said housing is formed with a through hole for movement of said urging member toward the door of the electric appliance.

11. A refrigerator comprises a refrigerator body and a door body; the automatic door opening device is characterized in that the box body comprises the automatic door opening device according to any one of claims 1 to 10, and the automatic door opening device is used for opening the door body sucked on the box body.

12. The refrigerator of claim 11, wherein said automatic door opener includes two pushing members, each of said pushing members having one end for abutting against and opening a door body engaged with said cabinet.

13. The refrigerator of claim 11, wherein the automatic door opening device is provided at the top or bottom of the refrigerator body.

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