CN114111159B

CN114111159B - Refrigerator

Info

Publication number: CN114111159B
Application number: CN202010869868.0A
Authority: CN
Inventors: 王仁华; 刘家行; 王明海
Original assignee: Hisense Refrigerator Co Ltd
Current assignee: Hisense Refrigerator Co Ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2022-11-11
Anticipated expiration: 2040-08-26
Also published as: CN114111159A

Abstract

The invention provides a refrigerator, which comprises a refrigerator body, a drawer storage unit and an automatic door opening and closing unit, wherein the refrigerator body is used for limiting a storage room with a taking and placing opening; wherein, the end part of the storage room close to the taking and placing port is provided with a proximity sensor, the guide rail bracket is provided with a slide rail, a fixed clamping strip capable of reciprocating along the slide rail is arranged in the slide rail, and the rear end of the fixed clamping strip is provided with a proximity sensor; the front end part of the fixed clamping strip is connected with the sliding rail through a spring; when the door body is opened, the door body drives the sliding rail to move forwards, the spring gradually contracts, and after the front end part of the sliding rail is abutted against the front end part of the fixed clamping strip, the sliding rail drives the fixed clamping strip to move forwards, and the approach sensor gradually approaches the approach sensor; when the drawer storage unit is opened to the limit position, the approach sensor acts on the approach sensor; the arrangement of the invention can effectively detect that the drawer door is opened to the maximum limit position, and fully utilize the space of the storage room.

Description

Refrigerator with a door

Technical Field

The invention belongs to the technical field of refrigerators, and particularly relates to a refrigerator.

Background

The refrigerator is a common refrigerating device, and a push-pull type door body of the refrigerator accords with living habits of people, so that the refrigerator is sneak in the market. With the increasing level of living, people's demand for automation of the freezing drawer door increases.

The invention is provided in view of the above.

Disclosure of Invention

The invention provides a refrigerator aiming at the technical problems.

In order to achieve the purpose, the invention adopts the technical scheme that:

a refrigerator, comprising:

a box body which defines a storage room with a taking and placing opening for taking and placing articles; a proximity sensor is arranged at the end part of the storage room close to the taking and placing opening;

a drawer storage unit provided in the storage compartment; the drawer storage unit includes:

the door body is used for opening or closing the taking and placing opening;

the object placing container is connected to the rear side of the door body and used for placing objects;

the two guide rail brackets are fixed on the rear side of the door body; and are respectively arranged at two opposite sides of the object placing container; a slide rail is arranged on the guide rail bracket;

the fixed clamping strip is arranged in the slide rail and can reciprocate along the slide rail; and the rear end part of the fixed clamping strip is provided with a proximity inductor;

one end of the spring is fixed with the front end part of the fixed clamping strip, and the other end of the spring is fixed with the sliding rail;

the automatic door opening and closing unit drives the door body to move so as to open or close the taking and placing opening;

when the door body is closed, the fixing clamping strip is contracted in the sliding rail, the distance between the front end part of the fixing clamping strip and the front end part of the sliding rail is the largest, and the spring is in a stretching state;

when the door body is opened, the door body drives the guide rail bracket and the slide rail to move forwards, the spring gradually contracts, the fixing clamping strip gradually moves out of the slide rail, and the front end part of the slide rail is gradually close to the front end part of the fixing clamping strip; when the front end part of the slide rail is abutted against the front end part of the fixed clamping strip, the slide rail drives the fixed clamping strip to move forwards, and the approach inductor gradually approaches the approach sensor; when the drawer storage unit is opened to the limit position, the proximity sensor corresponds to the proximity sensor and acts on the proximity sensor to transmit a signal that the drawer storage unit is opened to the limit position.

Preferably, a stop plate is arranged at the front end part of the fixing clamping strip, and the stop plate is matched with the front end part of the slide rail so as to limit the moving distance of the fixing clamping strip relative to the slide rail.

Preferably, the rear end part of the fixing clamping strip is provided with an accommodating part with an opening at one end, and the opening end of the accommodating part is provided with a fixing buckle; the proximity sensor is mounted in the housing.

Preferably, the proximity inductor is a magnetic core, and the proximity sensor is a reed switch.

Preferably, the rear end of the guide rail bracket is provided with a mounting seat, the mounting seat comprises a fixing plate fixed on the guide rail bracket, and the slide rail is arranged on the fixing plate.

Preferably, one side of the fixing plate, which is close to the guide rail bracket, is provided with an installation buckle, the guide rail bracket is provided with a connecting clamp hole matched with the installation buckle, and the installation seat is fixed on the guide rail bracket through the matching connection of the installation buckle and the connecting clamp hole.

Preferably, two groups of oppositely arranged guide buckles are arranged on the fixed plate, one group of the guide buckles is arranged at the front end of the fixed plate, and the other group of the guide buckles is arranged at the rear end of the fixed plate; the two groups of guide buckles define the slide rail together.

Preferably, a damping pad is arranged at the front end part of the mounting seat and is arranged on one side, far away from the center line of the sliding rail, of the guide buckle; when the stop plate on the fixing clamping strip is abutted against the front end part of the slide rail, the stop plate is matched with the vibration damping pad.

Preferably, a groove for accommodating the spring is formed in one side, close to the guide rail bracket, of the fixing plate; the groove direction is consistent with the slide rail direction, and a first fixing hole for fixing the spring is formed in the rear end of the groove.

Preferably, the guide rail bracket is provided with a guide rail; the door body can be connected to the box body along the guide rail in a sliding manner;

the automatic door opening and closing unit includes:

the rack is arranged on the box body;

the first gear is arranged on the guide rail bracket and meshed with the rack;

a drive unit, the drive unit comprising: the driving motor, the reduction gearbox and the electromagnetic clutch are connected in sequence through an output shaft;

the driving gear is connected to an output shaft of the electromagnetic clutch;

the driving gear transmits the driving force of the driving unit to the first gear through the meshing of the first gear, so that the first gear moves on the rack to drive the door body to move.

Compared with the prior art, the invention has the advantages and positive effects that:

the invention provides a refrigerator, which comprises a refrigerator body, a drawer storage unit and an automatic door opening and closing unit, wherein the refrigerator body is used for limiting a storage room with a taking and placing opening; the end part of the storage room close to the taking and placing port is provided with a proximity sensor, the guide rail bracket is provided with a slide rail, a fixed clamping strip capable of reciprocating along the slide rail is arranged in the slide rail, and the rear end of the fixed clamping strip is provided with a proximity inductor; the front end part of the fixed clamping strip is connected with the sliding rail through a spring; when the door body is opened, the door body drives the sliding rail to move forwards, the spring gradually contracts, and after the front end part of the sliding rail is abutted against the front end part of the fixed clamping strip, the sliding rail drives the fixed clamping strip to move forwards, and the approach sensor gradually approaches the approach sensor; when the drawer storage unit is opened to the limit position, the approach sensor acts on the approach sensor; the device can automatically and effectively detect that the drawer door is opened to the maximum limit position, and fully utilize the space of the storage room.

Drawings

Fig. 1 is an overall structural view of a refrigerator according to the present invention;

FIG. 2 is a schematic structural view of an automatic door opening and closing unit of the refrigerator in an open state;

FIG. 3 is a schematic structural view of a mounting seat of the refrigerator according to the present invention;

FIG. 4 is a schematic structural view of another view angle of the mounting base of the refrigerator according to the present invention;

FIG. 5 is a schematic structural view of a fixing clip strip of the refrigerator according to the present invention;

FIG. 6 is a schematic structural diagram of a refrigerator door in a closed state according to the present invention;

FIG. 7 is a sectional view showing a closed state of a door of the refrigerator according to the present invention;

FIG. 8 is a schematic view of an assembly structure of a mounting seat and a fixing clip strip of the refrigerator in a door-closed state;

fig. 9 is a sectional view of an assembly structure of a mounting seat and a fixing clip strip in a state that a door body of the refrigerator is closed according to the present invention;

FIG. 10 is a schematic view of an assembly structure of a mounting seat, a fixing clip strip and a guide rail bracket of the refrigerator in a door closing state according to the present invention;

fig. 11 is an assembly structure schematic view of the mount pad, the fixing clip strip and the guide rail bracket at another view angle when the door of the refrigerator is closed;

FIG. 12 is a schematic structural view of a refrigerator according to the present invention in a state where a door is fully opened;

FIG. 13 is a sectional view showing a fully opened state of a door of the refrigerator according to the present invention;

FIG. 14 is a schematic view of an assembly structure of a mounting seat and a fixing clip strip of the refrigerator in a state that a door body is opened;

FIG. 15 is a schematic view of an assembly structure of the mounting seat and the fixing clip strip at another view angle when the door of the refrigerator is opened according to the present invention;

fig. 16 is an assembly structure schematic view of another view angle of the mounting seat and the fixing clamping strip when the door body of the refrigerator is in an open state;

fig. 17 is a schematic view of an assembly structure of the mounting seat, the fixing clip strip and the guide rail bracket of the refrigerator in a state that the door body is closed;

fig. 18 is an assembly structure schematic view of the mounting seat, the fixing clamping strip and the guide rail bracket at another view angle when the door of the refrigerator is closed.

In the above figures: a box body 1; an inner container 1a; an automatic door opening and closing unit 3; a guide rail 5; a first gear 6; a rack 7; a synchronization rod 8; a drive unit 9; a drive gear 91; a support frame 10; a drawer door 12; a door body 13; a rail bracket 14; the connection card hole 14a; a storage container 30; a magnetic core 50; a reed switch 60; a spring 70; fixing the clamping strip 2; the accommodating portion 23; a fixing buckle 24; a stopper plate 25; a second fixing hole 26; a mounting seat 4; a fixed plate 41; a slide rail 42; a guide clip 43; a vibration damping pad 44; a recess 45; the first fixing hole 45a; the snap 46 is installed.

Detailed Description

The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the scope of the present invention as claimed is not limited to the scope described in the specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used for explaining the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are 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 at least one such feature.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 18, a refrigerator includes a cabinet defining a storage compartment having an access opening for accessing articles; the box body comprises a shell, an inner container 1a and a thermal insulation layer positioned between the shell and the inner container; the storage room is enclosed by an inner container 1a, and a drawer storage unit is arranged in the storage room. The refrigerator body is internally provided with a control unit for controlling programs of the refrigerator. In the invention, the drawer storage unit is pushed into or pulled out of the storage room through the taking and placing opening; in the refrigerator, one end close to the refrigerator body is marked as front, and one end close to the side wall, opposite to the taking and placing opening, on the inner container of the refrigerator is marked as back.

As shown in fig. 1 to 2, the drawer storage unit has a drawer door 12, and a tray-shaped storage container 30 is coupled to a rear side of the drawer door 12 to store an article. The user obtains or stores the items located in or in the storage compartment by pushing or pulling the storage container 30 into or out of the storage compartment.

The drawer door 12 comprises a door body 13 and two guide rail brackets 14 located on the rear side of the door body 13, guide rails 5 are mounted on the guide rail brackets 14, a support frame 10 is connected between the two guide rail brackets 14, and the drawer door 12 can be connected to the box body 1 along the guide rails 5 in a sliding mode.

As shown in fig. 6 and 12, the housing 1 is provided with a proximity sensor, which is provided in the storage compartment and is located at a front end portion of the housing 1 (i.e., an end portion of the housing 1 close to the door 13). In this embodiment, the proximity sensor is provided as a reed switch 60. The guide rail bracket 14 is connected with a fixing clamping strip 2, wherein the fixing clamping strip 2 is telescopically connected with the guide rail bracket 14, and a proximity inductor is arranged at the end part of the fixing clamping strip 2 far away from the door body 13; in this embodiment, the proximity inductor is provided as the magnetic core 50. When the drawer door 12 is completely opened, the fixed clamping strip 2 extends out of the length range of the guide rail bracket 2, and the proximity inductor (magnetic core 50) on the fixed clamping strip 2 is close to the proximity sensor (reed switch 60) and acts; when the drawer door 12 is in a closed state, the fixing clamping strip 2 is contracted within the length range of the guide rail bracket 2, the proximity inductor (magnetic core 50) on the fixing clamping strip 2 is positioned at the rear end in the storage room, the proximity inductor (magnetic core 50) is far away from the reed switch 60 at the front end of the box body 1, and the proximity inductor and the reed switch are not affected with each other. Above setting, can detect the drawer door and open extreme position, the drawer door opens to maximum position promptly.

Specifically, as shown in fig. 3 to 4, an installation seat 4 is fixed at one end of the guide rail bracket 14 close to the rear wall of the inner container 1a, a slide rail 42 is arranged on the installation seat 4, and the fixing clip strip 2 is arranged in the slide rail 42 on the installation seat 4 and can reciprocate along the slide rail 42, so as to extend out of or contract into the length range of the guide rail bracket 14, so as to extend or shorten the effective lengths of the fixing clip strip 2 and the guide rail bracket 14.

In this embodiment, the mounting base 4 includes a fixing plate 41, and the slide rail 42 is disposed on the fixing plate 41; specifically, the slide rail 42 is provided with two sets of oppositely arranged guide buckles 43, wherein one set of guide buckles 43 is arranged at the front end (the end close to the door body 13) of the fixed plate 41, and the other set of guide buckles 43 is arranged at the rear end (the end far away from the door body 13) of the fixed plate 41; the two sets of guide catches 43 together define the slide rail 42. The fixing plate 41 is provided with a mounting buckle 46 at one side close to the rail bracket 14, the rail bracket 14 is provided with a connecting buckle hole 14a matched with the mounting buckle 46, and the mounting seat 4 is fixed on the rail bracket 14 through the matching connection of the mounting buckle 46 and the connecting buckle hole 14 a. A damping pad 44 is provided at the front end (end close to the door body 13) of the mounting seat 4, and the damping pad 44 is provided on the side of the guide hook 43 away from the center line of the slide rail 42 and adjacent to the guide hook 43. Wherein, a groove 45 for accommodating the spring 70 is arranged on one side of the fixing plate 41 close to the guide rail bracket 14, wherein the position of the groove 45 is consistent with the direction of the slide rail 42; a first fixing hole 45a is provided at a rear end (end away from the door body) of the groove 45 for fixing one end of the connection spring 70. The front end (the end close to the door body) of the groove 45 is provided with a through hole for the spring 70 to pass through.

As shown in fig. 5, the fixing clip strip 2 includes a front end portion close to the door body 13 and a rear end portion far from the door body 13; wherein, the magnetic core 50 is arranged at the rear end part of the fixed clamping strip 2; in this embodiment, the rear end of the fixing clip strip 2 is provided with an accommodating part 23 with an opening at one end, and the opening end of the accommodating part 23 is provided with a fixing buckle 24; the magnetic core 50 is installed in the accommodating portion 23 and is limited in the accommodating portion 23 by the fixing buckle 24, so that the magnetic core 50 is fixedly connected with the fixing clamping strip 2. The rear end of the fixing clip strip 2 is provided with a stop plate 25 to match with one end of the sliding rail 42 close to the door body 13, so as to effectively limit the moving distance of the fixing clip strip 2 and avoid the fixing clip strip 2 from separating from the sliding rail 42. The stop plate 25 moves towards the front end part of the slide rail 42 to abut against the front end part of the slide rail 42, and the stop plate 25 is matched with the damping pad 44 on the mounting seat 4, so that the interaction between the stop plate 25 and the end part of the slide rail 42 during matching is effectively relieved, and the collision between the stop plate 25 and the end part of the slide rail 42 is avoided and noise is avoided.

The front end part of the fixed clamping strip 2 is provided with a second fixing hole 26, one end of the spring 70 is connected with the first fixing hole 45a on the mounting seat 4, and the other end is connected with the second fixing hole 26 on the front end part of the fixed clamping strip 2; the spring 70 is located in the groove 45 of the mounting seat 4 and extends and retracts in the direction of the groove 45.

As shown in fig. 6 to 11, when the drawer door 12 is in a closed state, a distance D1 between the rear end of the fixing clip strip 2 and the front end of the mounting seat 4 is minimum, a distance D2 between the front end of the fixing clip strip 2 and the front end of the mounting seat 4 is maximum, and the spring 70 is in a stretched state, and the length of the spring 70 is maximum in the whole door opening and closing process; the front end of the fixing clamping strip 2 is pulled backwards by the spring 70, so that the front end of the fixing clamping strip 2 and the front end of the mounting seat 4 tend to approach each other.

As shown in fig. 12 to 18, when the door body 13 is opened, the rail bracket 14 drives the mounting seat 4 to move forward along with the opening of the drawer door 12, since the mounting seat 4 is pulled forward by the spring 70, the front end of the fixed clamping strip 2 is pulled backward by the spring 70, the front end of the fixed clamping strip 2 gradually approaches the front end of the mounting seat 4, and the spring 70 contracts; as the front end of the fixing clip strip 2 approaches the front end of the mounting seat 4, the stop plate 25 on the fixing clip strip 2 contacts the damping pad 44 on the mounting seat 4 and compresses the damping pad 44; at this time, the distance D2=0 is the minimum between the front end of the fixed clip strip 2 and the front end of the mounting seat 4, and the distance D1 is the maximum between the rear end of the fixed clip strip 2 and the rear end of the mounting seat 4.

Then under the stopping action of the stopping plate 25 and the end part of the slide rail 42, the mounting seat 4 drives the fixed clamping strip 2 to move forwards, and the magnetic core 50 arranged on the rear end part of the fixed clamping strip 2 gradually approaches to the reed pipe 60 arranged on the front end of the box body 1; when the drawer door 12 is opened to the limit position, the magnetic core 50 on the fixing clip strip 2 acts on the reed switch 60 on the box body and transmits a signal indicating that the drawer door 12 is opened to the limit position to the control unit, so as to ensure that the drawer door 12 is fully opened.

As shown in fig. 2, the box body 1 further comprises an automatic door opening and closing unit 3, and the automatic door opening and closing unit 3 comprises a rack 7 mounted on the box body 1; a first gear 6 installed on the drawer door 12, and a driving unit 9 for driving the first gear 6 to rotate. The automatic door opening and closing unit 3 further comprises a driving gear 91, and the two first gears 6 are connected through a synchronizing rod 8; the driving gear 91 drives the first gear 6, and the synchronizing rod 8 transmits power synchronously to the first gear 6 on the other side, so that the first gear 6 synchronously moves on the rack 7 to drive the drawer door 12 to realize full-range sliding. In the present invention, the synchronizing lever 8 may be provided with a second gear, and the driving gear 91 may transmit the driving force to the first gear 6 via the second gear.

The driving unit 9 comprises a driving motor and an electromagnetic clutch which are sequentially connected through an output shaft; the driving motor and the electromagnetic clutch are coaxially arranged.

The output shaft of the driving motor is connected with the electromagnetic clutch; in the embodiment, a reduction gearbox is arranged, a driving motor and the reduction gearbox are integrally arranged, and an output shaft of the reduction gearbox is connected with an electromagnetic clutch; an output shaft of the electromagnetic clutch penetrates through the driving gear 91, the driving motor drives the reduction gearbox to move, the reduction gearbox adjusts the working speed of the driving motor, the electromagnetic clutch transmits or cuts off power transmitted by the driving motor, and finally the power of the driving motor is transmitted to the driving gear 91 to drive the driving gear 91 to move.

Automatic switch door unit 3 is still including the casing that is used for encapsulating drive unit 9, the casing is injectd installation driving motor, reducing gear box and electromagnetic clutch's cavity, when drawer door 12 is opened, because the water smoke that low temperature environment and air produced in the freezer, the sealed environment that the casing formed can effectively prevent driving motor, the reducing gear box, electromagnetic clutch causes rustting with the water smoke contact, can effectively reduce driving motor simultaneously, the reducing gear box, the noise that the electromagnetic clutch during operation produced, promote user's experience and feel.

When the power is on, the driving motor drives the reduction gearbox to move, the reduction gearbox drives the electromagnetic clutch to move through the output shaft, the electromagnetic clutch transmits power to the driving gear 91 through the output shaft, the driving gear 91 and the first gear 6 are in coaxial transmission, the first gear 6 is meshed with the rack 7 to drive the guide rail 5 to move back and forth, the drawer door 12 and the guide rail support 14 move back and forth along with the guide rail 5, and the whole-process automatic opening and closing of the drawer door 12 are realized; when the power is off, the drawer door 12 is pushed and pulled manually, the first gear 6 is meshed with the rack 7 to drive the guide rail 5 to move back and forth, and is meshed with the driving gear 91 to drive the output shaft of the electromagnetic clutch to move, the electromagnetic clutch automatically loosens the output shaft of the reduction gearbox under the power-off state, the rigid connection between the driving gear 91 and the driving unit 9 is cut off, and therefore the automatic door opening state and the conventional manual door opening and closing state can be switched freely.

Wherein, the control unit is led out a transmission line to be connected with the automatic door opening and closing unit 3 so as to realize the automatic opening of the drawer door 12; the transmission lines comprise a first transmission line connected with the driving unit 9 and a second transmission line connected with the door body 13, so that signal transmission between the driving unit 9 and the control unit and between the door body 13 and the control unit is realized. When a user needs to open the door body 13, a door opening signal is applied through the door body 13 and transmitted to the control unit through the second transmission line, the control unit is transmitted to the driving unit 9 through the first transmission line, the driving unit 9 is powered on, and the drawer door 12 and the guide rail bracket 14 move forwards along with the guide rail 5. When the door body 13 is closed, the drawer door 12 and the rail brackets 14 move rearward along with the rails 5.

In the invention, a proximity sensor (reed pipe 60) is arranged at the end part of the box body 1 close to the door body 13, a fixed clamping strip 2 which is in telescopic connection with the guide rail support 14 is arranged on the guide rail support, and a proximity inductor (magnetic core 50) is arranged at the end part of the fixed clamping strip 2 far away from the door body 13. When the drawer door 12 is completely opened, the fixed clamping strip 2 extends out of the length range of the guide rail bracket 2, the proximity inductor (magnetic core 50) on the fixed clamping strip 2 is close to the proximity sensor (reed pipe 60) and acts on the proximity sensor (reed pipe 60), and the proximity sensor (reed pipe 60) transmits a signal that the door body is opened to the limit position so as to effectively detect that the drawer door is opened to the maximum limit position; when the drawer door 12 is in a closed state, the fixing clamping strip 2 extends out and contracts in the length range of the guide rail bracket 2, the proximity inductor (magnetic core 50) on the fixing clamping strip 2 is located at the rear end in the storage room, the proximity inductor (magnetic core 50) is far away from the proximity sensor (reed pipe 60), and the proximity inductor and the magnetic core are not affected with each other. Above setting, can effectively detect the drawer door and open to the biggest extreme position to make full use of the space in storeroom.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes by using the technical contents disclosed in the above description to other fields, but any simple modification, equivalent change and change made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The refrigerator is characterized in that: it includes:

the door body is used for opening or closing the taking and placing opening;

the article container is connected to the rear side of the door body and used for placing articles;

the two guide rail brackets are fixed on the rear side of the door body; and are respectively arranged at two opposite sides of the object placing container; the rear end of the guide rail bracket is provided with a mounting seat, the mounting seat comprises a fixed plate fixed on the guide rail bracket, and a slide rail is formed on the fixed plate;

2. The refrigerator according to claim 1, wherein: the front end part of the fixing clamping strip is provided with a stop plate, and the stop plate is matched with the front end part of the slide rail so as to limit the moving distance of the fixing clamping strip relative to the slide rail.

3. The refrigerator according to claim 1, wherein: an accommodating part with an opening at one end is arranged at the rear end part of the fixing clamping strip, and a fixing buckle is arranged at the opening end of the accommodating part; the proximity sensor is mounted in the housing.

4. The refrigerator according to claim 3, wherein: the proximity inductor is a magnetic core, and the proximity sensor is a reed switch.

5. The refrigerator according to any one of claims 1 to 4, wherein: the fixing plate is close to one side of the guide rail support is provided with an installation buckle, the guide rail support is provided with a connecting clamp hole matched with the installation buckle, and the installation seat is fixed on the guide rail support through the matching connection of the installation buckle and the connecting clamp hole.

6. The refrigerator according to any one of claims 1 to 4, wherein: two groups of oppositely arranged guide buckles are arranged on the fixed plate, wherein one group of the guide buckles is arranged at the front end of the fixed plate, and the other group of the guide buckles is arranged at the rear end of the fixed plate; the two groups of guide buckles define the slide rail together.

7. The refrigerator according to claim 6, wherein: a damping pad is arranged at the front end part of the mounting seat and is arranged on one side of the guide buckle far away from the central line of the slide rail; when the stop plate on the fixing clamping strip is abutted against the front end part of the sliding rail, the stop plate is matched with the vibration damping pad.

8. The refrigerator according to any one of claims 1 to 4, wherein: a groove for containing the spring is formed in one side, close to the guide rail bracket, of the fixing plate; the groove direction is consistent with the slide rail direction, and a first fixing hole for fixing the spring is formed in the rear end of the groove.

9. The refrigerator according to claim 1, wherein:

the guide rail bracket is provided with a guide rail; the door body is connected to the box body along the guide rail in a sliding manner;

the automatic door opening and closing unit includes:

the rack is arranged on the box body;

the first gear is arranged on the guide rail bracket and meshed with the rack;

a drive unit, the drive unit comprising: the driving motor, the reduction box and the electromagnetic clutch are sequentially connected through an output shaft;

the driving gear is connected to an output shaft of the electromagnetic clutch;