CN114111159B - Refrigerator - Google Patents

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

technical field

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

Background technique

Refrigerator is a kind of commonly used refrigerating equipment, and its push-pull door conforms to people's living habits, so it is pushed by the market. With the improvement of living standards, people's demand for automation of freezer drawer doors has increased.

In view of this, the present invention is proposed.

Contents of the invention

Aiming at the above technical problems, the present invention proposes a refrigerator.

In order to achieve the above object, the technical scheme adopted in the present invention is:

Refrigerator, which includes:

The box body defines a storage room with a pick-and-place opening for picking and placing items; the end of the storage room near the pick-and-place opening is provided with a proximity sensor;

A drawer storage unit, which is located in the storage room; the drawer storage unit includes:

a door body, used to open or close the access opening;

a storage container, connected to the rear side of the door body, for placing items;

Guide rail brackets, the two guide rail brackets are fixed on the rear side of the door body; and are separated on the opposite sides of the storage container; slide rails are provided on the guide rail brackets;

The fixed clip is installed in the slide rail, and can reciprocate along the slide rail; and the rear end of the fixed clip is provided with a proximity sensor;

A spring, one end of which is fixed to the front end of the fixing clip, and the other end is fixed to the slide rail;

an automatic door switch unit, which drives the door body to move, so that the door body can open or close the pick-and-place opening;

When the door body is closed, the fixed clip is shrunk in the slide rail, the distance between the front end of the fixed clip and the front end of the slide rail is the largest, and the spring is in a stretched state;

When the door body is opened, the door body drives the guide rail bracket and the slide rail to move forward, the spring shrinks gradually, the fixing clip gradually moves out of the slide rail, and the front end of the slide rail gradually close to the front end of the fixed clip; when the front end of the slide rail abuts against the front end of the fixed clip, the slide rail drives the fixed clip to move forward, and the proximity sensor Gradually approach the proximity sensor; when the drawer storage unit is opened to the limit position, the proximity sensor corresponds to the position of the proximity sensor and acts on the proximity sensor to transmit the opening of the drawer storage unit Signal to limit position.

Preferably, a stop plate is provided at the front end of the fixing bar, and the stop plate cooperates with the front end of the sliding rail to limit the moving distance of the fixing bar relative to the sliding rail.

Preferably, a receiving portion with an open end is provided on the rear end of the fixing clip, and a fixing buckle is provided at the opening end of the receiving portion; the proximity sensor is installed in the receiving portion.

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

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

Preferably, a mounting buckle is provided on the side of the fixing plate close to the guide rail bracket, and a connection card hole matched with the installation buckle is provided on the guide rail bracket, through which the installation buckle is connected with the The matching connection of the connection card hole fixes the mounting base on the guide rail bracket.

Preferably, two sets of guide buckles are arranged opposite to each other on the fixed plate, one set of guide buckles is arranged at the front end of the fixed plate, and the other set of guide buckles is arranged behind the fixed plate end; two sets of guide buckles jointly define the slide rail.

Preferably, the front end of the mounting base is provided with a vibration-damping pad, and the vibration-damping pad is provided on the side of the guide buckle away from the center line of the slide rail; When the front ends of the slide rails abut against each other, the stop plate cooperates with the vibration-damping pad.

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

Preferably, a guide rail is installed on the guide rail bracket; the door body can be slidably connected to the box body along the guide rail;

The automatic door switch unit includes:

a rack mounted on the box;

a first gear, arranged on the guide rail bracket, and the first gear meshes with the rack;

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

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

Wherein, 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 prior art, advantage and positive effect of the present invention are:

The invention provides a refrigerator, which includes a box body defining a storage room with a pick-and-place opening, a drawer storage unit, and an automatic opening and closing door unit. The drawer storage unit includes a door body and a guide rail bracket connected to the rear side of the door body; wherein the storage A proximity sensor is provided at the end near the pick-and-place opening, a slide rail is provided on the guide rail bracket, and a fixed clip that can reciprocate along the slide rail is installed in the slide rail, and a proximity sensor is provided at the rear end of the fixed clip; The front end of the fixed clip is connected to the slide rail through a spring; when the door is opened, the door drives the slide rail to move forward, and the spring shrinks gradually. When the front end of the slide rail touches the front end of the fixed clip, the sliding The rail drives the fixed bar to move forward, and the proximity sensor gradually approaches the proximity sensor; when the drawer storage unit is opened to the limit position, the proximity sensor acts on the proximity sensor; the setting in the present invention can automatically and effectively detect that the drawer door is opened to the maximum Extreme position, and make full use of the space in the storage room.

Description of drawings

Fig. 1 is the whole structure schematic diagram of refrigerator of the present invention;

Fig. 2 is a schematic diagram of the structure of the automatic door opening and closing unit of the refrigerator of the present invention when the door body is opened;

Fig. 3 is a schematic structural view of the mounting seat of the refrigerator of the present invention;

Fig. 4 is a structural schematic diagram of another viewing angle of the mounting seat of the refrigerator of the present invention;

Fig. 5 is a structural schematic diagram of the fixing clip of the refrigerator of the present invention;

Fig. 6 is a structural schematic diagram of the closed state of the door of the refrigerator of the present invention;

Fig. 7 is a cross-sectional view of the closed state of the door of the refrigerator of the present invention;

Fig. 8 is a schematic diagram of the assembly structure of the mounting seat and the fixing clip when the door body of the refrigerator is closed according to the present invention;

Fig. 9 is a cross-sectional view of the assembly structure of the mounting seat and the fixing clip when the door body of the refrigerator is closed according to the present invention;

Fig. 10 is a schematic diagram of the assembly structure of the mounting seat, the fixing clip and the guide rail bracket when the door body of the refrigerator is closed according to the present invention;

Fig. 11 is a schematic diagram of the assembly structure of the mounting seat, the fixing clip and the guide rail bracket from another angle of view when the door body of the refrigerator is closed;

Fig. 12 is a schematic structural view of the door of the refrigerator in the fully opened state of the present invention;

Fig. 13 is a cross-sectional view of the door of the refrigerator of the present invention in a fully opened state;

Fig. 14 is a schematic diagram of the assembly structure of the mounting seat and the fixing clip when the door of the refrigerator is opened according to the present invention;

Fig. 15 is a schematic diagram of the assembly structure of the mounting seat and the fixing clip from another perspective when the door of the refrigerator is opened according to the present invention;

Fig. 16 is a schematic diagram of the assembly structure of the mounting seat and the fixing clip from another perspective when the door of the refrigerator is opened according to the present invention;

Fig. 17 is a schematic diagram of the assembly structure of the mounting seat, the fixing clip and the guide rail bracket when the door body of the refrigerator is closed according to the present invention;

Fig. 18 is a schematic diagram of the assembly structure of the mounting seat, the fixing clip and the guide rail bracket from another perspective when the door body of the refrigerator is closed according to the present invention.

In the above figures: box body 1; liner 1a; automatic door opening and closing unit 3; guide rail 5; first gear 6; rack 7; synchronous lever 8; drive unit 9; drive gear 91; support frame 10; ; Door body 13; Rail bracket 14; Connect card hole 14a; Storage container 30; Magnetic core 50; Reed switch 60; Two fixing holes 26 ; mounting base 4 ; fixing plate 41 ; slide rail 42 ; guide buckle 43 ; vibration damping pad 44 ; groove 45 ;

Detailed ways

The present invention will be further described below in conjunction with specific embodiments, so that those skilled in the art can better understand the present invention and can implement it, but the claimed scope of the present invention is not limited to the scope described in the specific embodiments . It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) The relative positional relationship between the various components, the movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

In addition, the descriptions involving "first", "second" and so on in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

As shown in Fig. 1-Fig. 18, the refrigerator includes a box body, and the box body defines a storage room with a pick-and-place opening for picking and placing items; the box body includes an outer shell, an inner liner 1a, and a thermal insulation layer between the two; The storage room is surrounded by an inner container 1a, in which a drawer storage unit is arranged. A control unit for controlling each program of the refrigerator is arranged in the cabinet. In the present invention, the drawer storage unit is pushed into or pulled out of the storage room through the access port; in the present invention, the end of the refrigerator close to the box body is marked as the front, and the end close to the side wall opposite to the access port on the inner liner of the refrigerator is marked as the rear .

As shown in FIGS. 1-2 , the drawer storage unit has a drawer door 12 , and the rear side of the drawer door 12 is connected with a tray-shaped storage container 30 for storing articles. The user obtains the items located in the storage room or stores the items in the storage room by pushing or pulling the storage container 30 into or out of the storage room.

The drawer door 12 includes a door body 13 and two guide rail supports 14 positioned at the rear side of the door body 13. The guide rail 5 is installed on the guide rail support 14, and the support frame 10 is connected between the two guide rail supports 14. The drawer door 12 can be moved along the guide rail 5. Slidingly connected to box 1.

As shown in Fig. 6 and Fig. 12, a proximity sensor is provided on the box body 1, and the proximity sensor is located in the storage room, and is located at the front end of the box body 1 (that is, the end of the box body 1 near the door body 13). In this embodiment, the proximity sensor is set as a reed switch 60 . The guide rail support 14 is connected with a fixed clip 2, wherein the fixed clip 2 is telescopically connected with the guide rail support 14, and the end of the fixed clip 2 away from the door body 13 is provided with a proximity sensor; The induction body is set as a magnetic core 50 . When the drawer door 12 was fully opened, the fixed clip 2 stretched out within the length of the guide rail support 2, and the proximity sensor (magnetic core 50) on the fixed clip 2 was close to the proximity sensor (reed switch 60), and had an effect; When the drawer door 12 was in the closed state, the fixed clip 2 shrunk within the length of the guide rail support 2, and the proximity inductor (magnetic core 50) on the fixed clip 2 was located at the rear end in the storage room, and the proximity inductor (magnetic core 50) was located at the rear end of the storage room. 50) away from the reed switch 60 at the front end of the box body 1, the two do not affect each other. The above settings can detect that the drawer door is opened to the limit position, that is, the drawer door is opened to the maximum position.

Specifically, as shown in Figures 3-4, the end of the guide rail bracket 14 close to the rear wall of the inner tank 1a is fixed with a mounting seat 4, and a slide rail 42 is provided on the mounting seat 4, and the fixing clip 2 is arranged on the mounting seat 4. inside the slide rail 42 , and can move back and forth along the slide rail 42 , so as to extend or shrink within the length range of the guide rail bracket 14 , so as to extend or shorten the effective lengths of both the fixing clip 2 and the guide rail bracket 14 .

In this embodiment, the mounting seat 4 includes a fixed plate 41, and the slide rail 42 is arranged on the fixed plate 41; specifically, the slide rail 42 is set as two sets of guide buckles 43 oppositely arranged, wherein one set of guide buckles 43 is set On the front end of the fixing plate 41 (the end close to the door body 13), another set of guide buckles 43 is arranged on the rear end of the fixing plate 41 (the end away from the door body 13); the two sets of guide buckles 43 jointly define a slide rail 42. One side of the fixed plate 41 near the guide rail bracket 14 is provided with an installation buckle 46, and the guide rail bracket 14 is provided with a connection card hole 14a matched with the installation buckle 46. Fix the mounting base 4 on the rail bracket 14 . In addition, the front end of the mounting seat 4 (the end close to the door body 13) is provided with a vibration-damping pad 44, and the vibration-damping pad 44 is arranged on the side of the guide buckle 43 away from the center line of the slide rail 42, and is adjacent to the guide buckle 43. set up. Wherein, the fixed plate 41 is provided with a groove 45 for accommodating the spring 70 near the side of the guide rail bracket 14, wherein the position of the groove 45 is consistent with the direction of the slide rail 42; the rear end of the groove 45 (away from the door body One end) is provided with a first fixing hole 45a for fixing one end of the connection spring 70 . The front end of the groove 45 (the end close to the door body) is provided with a through hole for the spring 70 to pass through.

As shown in Figure 5, the fixed clip 2 includes a front end close to the door 13 and a rear end away from the door 13; wherein, the magnetic core 50 is arranged at the rear end of the fixed clip 2; in this embodiment, the fixed The rear end of the clip bar 2 is provided with a receiving portion 23 with an open end, and the opening end of the receiving portion 23 is provided with a fixing buckle 24; 23, so that the magnetic core 50 is fixedly connected with the fixing clip 2. The rear end of the fixed clip 2 is provided with a stop plate 25 to cooperate with the end of the slide rail 42 close to the door body 13 to effectively limit the moving distance of the fixed clip 2 and prevent the fixed clip 2 from sliding by the slide rail 42. Inner detachment. The stopper plate 25 moves to the front end of the slide rail 42 until it abuts against the front end of the slide rail 42, and the stopper plate 25 cooperates with the damping pad 44 on the mounting base 4, thereby effectively relieving the stopper plate 25 from contacting the slide rail. The interaction between the 42 ends when they are mated, avoiding the impact of the two and generating noise.

The front end of the fixed clip 2 is provided with a second fixed hole 26, one end of the spring 70 is connected with the first fixed hole 45a on the mounting base 4, and the other end is connected with the second fixed hole 26 on the front end of the fixed clip 2; 70 is located in the groove 45 on the mounting seat 4, and expands and contracts along the direction of the groove 45.

As shown in Figures 6-11, when the drawer door 12 is in the closed state, the distance D1 between the rear end of the fixing clip 2 and the front end of the mounting seat 4 is the smallest, and the front end of the fixing clip 2 is in contact with the mounting seat 4. The distance D2 between the front ends of the front ends is the largest, and the spring 70 is in a stretched state. During the entire door opening and closing process, the length of the spring 70 is the largest at this time; The rearward tension of the spring 70 makes the front end of the fixing clip 2 and the front end of the mounting base 4 tend to approach each other.

As shown in Figures 12-18, the door body 13 is opened, and as the drawer door 12 is opened, the guide rail bracket 14 drives the installation seat 4 to move forward, and since the installation seat 4 is pulled forward by the spring 70, the fixed clip 2 The front end is pulled backward by the spring 70, the front end of the fixed clip 2 and the front end of the mounting seat 4 gradually approach, and the spring 70 shrinks; as the front end of the fixed clip 2 approaches the front end of the mounting seat 4, the fixed The stop plate 25 on the clip 2 is in contact with the damping pad 44 on the mount 4, and compresses the shock pad 44; at this time, the distance between the front end of the fixed clip 2 and the front end of the mount 4 is the smallest D2=0, the distance D1 between the rear end of the fixing clip 2 and the rear end of the mounting seat 4 is the largest.

Then, under the stop action of the stop plate 25 and the end of the slide rail 42, the mounting seat 4 drives the fixed clip 2 to move forward, and the fixed clip 2 is arranged on the magnetic core 50 on the rear end gradually close to the box. The reed switch 60 at the front end of the body 1; when the drawer door 12 is opened to the limit position, the magnetic core 50 on the fixed clip 2 will act on the reed switch 60 on the box body, and transmit the drawer door 12 to open to the limit position. Signal to the control unit to ensure that the drawer door 12 is fully opened.

As shown in Figure 2, box body 1 also comprises automatic switch door unit 3, and automatic switch door unit 3 comprises the rack 7 that is installed on the box body 1; The first gear 6 that is installed on the drawer door 12 is used for driving the first A gear 6 turns the drive unit 9 . Wherein, the automatic door switch unit 3 also includes a driving gear 91, and the two first gears 6 are connected by a synchronous rod 8; the driving gear 91 drives the first gear 6, and the synchronous rod 8 transmits the power synchronously to the first gear on the other side 6, make the first gear 6 move synchronously on the rack 7, and drive the drawer door 12 to realize full-range sliding. It should be noted that, in the present invention, a second gear can also be provided on the synchronization lever 8 , and the driving gear 91 transmits the driving force to the first gear 6 through the second gear.

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

The output shaft of the driving motor is connected with the electromagnetic clutch; in the present embodiment, a reduction box is set, the driving motor and the reduction box are integrated, and the output shaft of the reduction box is connected with the electromagnetic clutch; the output shaft of the electromagnetic clutch passes through the driving gear 91, and the driving motor drives the reduction box Movement, the reduction box adjusts the working speed of the driving motor, the electromagnetic clutch transmits or cuts off the power transmitted by the driving motor, and finally the power of the driving motor is transmitted to the driving gear 91, which drives the driving gear 91 to move.

The automatic switch door unit 3 also includes a housing for encapsulating the drive unit 9, and the housing defines a chamber for installing the drive motor, reduction box and electromagnetic clutch. Water mist, the sealed environment formed by the shell can effectively prevent the drive motor, gearbox, electromagnetic clutch from rusting caused by contact with water mist, and at the same time can effectively reduce the noise generated by the drive motor, gearbox, and electromagnetic clutch when they are working, improving user experience sense.

When energized, the drive motor drives the reduction box to move, and the reduction box drives the electromagnetic clutch to move through the output shaft, and the electromagnetic clutch transmits power to the drive gear 91 through the output shaft, and the drive gear 91 is coaxially transmitted with the first gear 6, and the first gear 6 Mesh with the rack 7, drive the guide rail 5 to move back and forth, the drawer door 12 and the guide rail bracket 14 move back and forth with the guide rail 5, and realize the full automatic switch of the drawer door 12; when the power is off, manually push and pull the drawer door 12, the first gear 6 and the gear The meshing of bar 7 drives the guide rail 5 to move back and forth, and meshes with the driving gear 91, driving the output shaft of the electromagnetic clutch to move, and the electromagnetic clutch automatically releases the output shaft of the reduction box in the power-off state, cutting off the rigidity between the driving gear 91 and the driving unit 9 Connection, so as to realize the arbitrary switching between the automatic door opening state and the conventional manual door opening state.

Wherein, the transmission line drawn from the control unit is connected with the automatic switch door unit 3 to realize the automatic opening of the drawer door 12; wherein the transmission line includes a first transmission line connected with the drive unit 9 and a second transmission line connected with the door body 13 to realize the drive unit 9 Signal transmission with the control unit and between the door body 13 and the control unit. When the user needs to open the door body 13, the door opening signal is applied through the door body 13, the door opening signal is transmitted to the control unit through the second transmission line, the control unit is transmitted to the drive unit 9 through the first transmission line, the drive unit 9 is powered on, the drawer door 12 and the guide rail bracket 14 moves forward with guide rail 5. When the door body 13 is closed, the drawer door 12 and the guide rail bracket 14 move backward along with the guide rail 5 .

In the present invention, the end of the box body 1 close to the door body 13 is provided with a proximity sensor (reed switch 60), and the guide rail bracket 14 is provided with a fixed clip 2 telescopically connected thereto, and the fixed clip 2 is far away from the door body. The end of 13 is provided with proximity induction body (magnetic core 50). When the drawer door 12 was fully opened, the fixed clip 2 stretched out within the length of the guide rail support 2, and the proximity sensor (magnetic core 50) on the fixed clip 2 was close to the proximity sensor (reed switch 60), and the proximity sensor (reed switch 60) works, and the proximity sensor (reed switch 60) transmits the 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 the closed state, the fixed clip 2 stretch out and shrink within the length range of the guide rail bracket 2, the proximity sensor (magnetic core 50) on the fixed clip 2 is located at the rear end of the storage room, and the proximity sensor (magnetic core 50) is far away from the proximity sensor (reed switch 60) ), the two do not affect each other. The above settings can effectively detect that the drawer door is opened to the maximum limit position, and make full use of the space in the storage room.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention to other forms. Any skilled person who is familiar with this field may use the technical content disclosed above to change or remodel it into an equivalent embodiment with equivalent changes. Applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims (9)

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

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 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;

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.

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;

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.

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