CN215571494U - A kind of refrigerator - Google Patents

Abstract

The utility model discloses a refrigerator, wherein a shelf is arranged on the inner container side of a door body, a vacuumizing connector is arranged on the shelf and is connected with a vacuum pump through a pipeline, a magnetic proximity switch is arranged on the shelf, a preservation box is placed on the shelf, a vacuumizing interface and a magnetic part are arranged on the preservation box, the vacuumizing connector is connected with the vacuumizing interface, and the magnetic part triggers the magnetic proximity switch to enable the vacuum pump to vacuumize the preservation box. The magnetic proximity switch is adopted to trigger the vacuum pump to vacuumize the preservation box, so that the operation convenience is improved, and meanwhile, the space on the side of the door liner, occupied by the vacuumizing joint device, is reduced, and the structure on the side of the door liner is more compact.

Description

A kind of refrigerator

Technical Field

The utility model relates to the technical field of refrigeration equipment, in particular to a refrigerator with a vacuum refreshing device.

Background

In recent years, people's health consciousness is gradually improved, and the demand for food material preservation is also improved, so that the refrigerator is used as the most common household appliance for storing food materials, and the food material preservation storage becomes a technical demand to be solved urgently in the field of refrigerators.

At present, different preservation technologies are introduced by various manufacturers aiming at the problem of food material preservation and storage. For example, in the vacuum preservation technology, the food deterioration condition is changed in the vacuum state. Firstly, in a vacuum environment, microorganisms and various promoting enzymes are difficult to survive, and the requirement of microorganism breeding can be met for a long time; secondly, under the vacuum state, the oxygen in the container is greatly reduced, various chemical reactions can not be completed, the food can not be oxidized, and the food can be preserved for a long time.

The vacuum preservation technology applied to the refrigerator at present mainly comprises the steps that a sealed drawer is arranged in the refrigerator, and the drawer is vacuumized through a small vacuum pump arranged outside the drawer, so that the drawer is kept in a negative pressure state, and the preservation of food materials in the drawer is realized. This preservation method has the following limitations: 1. because the vacuum pumping treatment is realized by a vacuum pump, the vacuum pump can occupy part of the storage space of the refrigerating chamber; 2. the drawer is required to be sealed in the fresh-keeping mode, otherwise, the vacuum state cannot be formed in the drawer, and therefore higher requirements are provided for the forming and assembling processes of the drawer; 3. the drawer belongs to an inherent part in the refrigerator, and the drawer can not be taken out of the refrigerator for random transportation, so that the drawer is inconvenient for the transportation and the use of vacuum fresh-keeping articles.

In order to solve a series of problems generated by vacuumizing and refreshing by using a drawer, the applicant previously applied a related patent in which a refreshing box is arranged on the side of a door body inner container, the side of the door body inner container is provided with a base, the refreshing box is placed on the base, the side of the door body inner container is also provided with a vacuumizing connector device, and the vacuumizing connector device is communicated with a vacuumizing interface at the top of the refreshing box so as to vacuumize the refreshing box. During operation, after the preservation box is placed on the base, the vacuumizing connector device and the preservation box vacuumizing interface are required to be manually connected. When taking the crisper off the base, the vacuum-pumping connector device still needs to be manually removed from the crisper, and the crisper can be taken away.

The applicant further develops and develops the technical route of arranging the preservation box at the inner container side of the door body, and really from the use angle of users, the scheme still has a space for further improving the improvement, so that the use convenience of the users is further improved, and the space occupied by the vacuumizing joint device is reduced.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems pointed out in the background technology, the utility model provides a refrigerator, wherein a shelf on the inner container side of a door body has a vacuumizing function, a preservation box placed on the shelf can be directly vacuumized, a magnetic proximity switch is adopted to trigger a vacuum pump to vacuumize the preservation box, the operation convenience is improved, meanwhile, the space on the inner container side of the door body occupied by a vacuumizing joint device is reduced, and the structure on the inner container side of the door body is more compact.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

in some embodiments of the present application, there is provided a refrigerator including:

a storage chamber;

a door for opening or closing the storage chamber;

the rack is arranged on the inner container side of the door body, a vacuumizing connector is arranged on the rack and connected with a vacuum pump through a pipeline, and a magnetic proximity switch is arranged on the rack;

the preservation box is provided with a vacuumizing interface and a magnetic part;

the preservation box is placed on the shelf, the vacuumizing connector is connected with the vacuumizing interface, and the magnetic part triggers the magnetic proximity switch to enable the vacuum pump to vacuumize the preservation box.

In some embodiments of the present application, the magnetic proximity switch is disposed at the bottom of the shelf, and the magnetic portion is disposed at the bottom of the preservation box, and the preservation box is placed at the in-process of the shelf, the magnetic portion is close to the magnetic proximity switch.

In some embodiments of this application, the bottom of preservation box is equipped with the mounting groove, magnetism portion is fixed to be located in the mounting groove.

In some embodiments of the present application, the shelf includes a bottom cavity, the preservation box is placed on a top plate enclosing the bottom cavity, and the vacuumizing joint is arranged in the bottom cavity;

the bottom of the bottom cavity is provided with a wiring maintenance cavity, the magnetic proximity switch is arranged in the wiring maintenance cavity, and a wire connected with the magnetic proximity switch is led out from the wiring maintenance cavity.

In some embodiments of the present application, a plurality of said crispers are placed on said shelf;

the bottom cavity is internally provided with a plurality of vacuumizing joints, the wiring maintenance cavity is internally provided with a plurality of magnetic proximity switches, the vacuumizing joints are in one-to-one correspondence with vacuumizing interfaces on the preservation boxes, and the magnetic proximity switches are in one-to-one correspondence with magnetic parts on the preservation boxes.

In some embodiments of the present application, the magnetic proximity switch is disposed on the side wall of the shelf, and the magnetic portion is disposed on the side wall of the preservation box, and the preservation box is placed on the shelf, wherein the magnetic portion is close to the magnetic proximity switch.

In some embodiments of the present application, the vacuum joint is disposed at the bottom of the shelf, and the vacuum port is disposed at the bottom of the preservation box.

In some embodiments of the present application, the vacuum joints are disposed on the sidewalls of the shelf, and the vacuum joints are disposed on the sidewalls of the preservation box.

In some embodiments of the present application, a pressure sensor is disposed on a pipeline connecting the vacuum pumping joint and the vacuum pump.

In some embodiments of the present application, the magnetic portion is a permanent magnet.

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

in the refrigerator disclosed in this application, trigger opening of vacuum pump through magnetism proximity switch, it is specific, be equipped with magnetism proximity switch on the shelf, be equipped with magnetism portion on the preservation box, when placing the shelf with the preservation box, magnetism portion is close to magnetism proximity switch and triggers magnetism proximity switch, magnetism proximity switch detects the preservation box and places the back in place, will detect information feedback to control panel, the control panel assigns the action instruction to the vacuum pump again, the vacuum pump opens immediately in order to the evacuation of preservation box.

Adopt magnetism proximity switch's structural style, need not the extra manual start button that triggers of user, the vacuum pump can be automatic to the crisper evacuation, realizes the intelligent and convenient design of evacuation action, improves the user and uses experience.

Other features and advantages of the present invention will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a refrigerator according to an embodiment;

FIG. 2 is a schematic structural view of a door body according to an embodiment;

FIG. 3 is a schematic structural view of a shelf according to an embodiment;

FIG. 4 is a schematic view of the structure shown in FIG. 3 with the top plate omitted;

FIG. 5 is a schematic view of the structure shown in FIG. 4 with the vacuum pump and its piping omitted;

FIG. 6 is a schematic view of a crisper according to an embodiment, viewed from the bottom side;

fig. 7 is a cross-sectional view of the crisper assembled with a shelf, according to an embodiment.

Reference numerals:

100-storage room, 110-freezer, 120-refrigerator;

200-a door body, 210-a second clamping part;

300-shelf, 310-bottom cavity, 320-routing maintenance cavity, 330-inner bottom plate, 331-second mounting groove, 332-receiving groove, 333-arc clamping plate, 334-supporting part, 340-side plate, 341-first clamping part, 350-top plate and 360-outer bottom plate;

400-a preservation box, 410-a first mounting groove;

500-vacuum joint;

600-a vacuum interface;

700-a magnetic portion;

800-magnetic proximity switches;

900-vacuum pump.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

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

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Fig. 1 is a perspective view of an embodiment of a refrigerator of the present application, the refrigerator of the present embodiment having an approximately rectangular parallelepiped shape. The external appearance of the refrigerator is defined by a storage chamber 100 defining a storage space and a plurality of door bodies 200 provided in the storage chamber 100.

The storage compartment 100 has an open cabinet, and the storage compartment 100 is vertically partitioned into a lower freezer compartment 110 and an upper refrigerator compartment 120. Each of the partitioned spaces may have an independent storage space. In detail, the freezing compartment 110 is located at a lower side of the storage compartment 100 and may be selectively covered by a drawer type freezing compartment door. The space above the freezing chamber 110 is partitioned into left and right sides to form the refrigerating chamber 120, respectively, and the refrigerating chamber 120 may be selectively opened or closed by a refrigerating chamber door body pivotably mounted on the refrigerating chamber 120.

The refrigerator is provided with a vacuumizing device, the vacuumizing device comprises a vacuum pump and a vacuumizing connector, the vacuum pump is connected with the vacuumizing connector through a pipeline, and the vacuumizing connector is in butt joint with a container to be vacuumized, so that the container can be vacuumized.

Referring to fig. 2 to 4, a shelf 300 is disposed on the inner container side of the door body, a vacuum joint 500 is disposed on the shelf 300, and the vacuum joint 500 is connected to a vacuum pump 900 through a pipeline.

The preservation box 400 is placed on the shelf 300, and the preservation box 400 is used for providing a low-pressure environment for food materials to be preserved and stored.

Referring to fig. 6 and 7, the preservation box 400 is provided with a vacuum interface 600.

After the preservation box 400 is placed on the shelf 300, the vacuumizing connector 500 is just in butt joint with the vacuumizing interface 600, and the preservation box 400 can be vacuumized by starting the vacuum pump 900, so that the low-pressure environment suitable for food material preservation and storage is achieved in the preservation box 400.

With the integrated structure of evacuation joint 500 and shelf 300, shelf 300 is used for placing preservation box 400 on the one hand, and on the other hand can carry out the evacuation to preservation box 400 again, and is multi-functional integrated, has advantages such as compact structure, use are convenient.

This application triggers opening of vacuum pump through magnetism proximity switch, it is specific, be equipped with magnetism proximity switch 800 on the shelf 300, be equipped with magnetism portion 700 on the preservation box 400, when placing the shelf 300 with preservation box 400 on, magnetism portion 700 is close to magnetism proximity switch 800, and trigger magnetism proximity switch 800, magnetism proximity switch 800 detects preservation box 400 and places the back that targets in place, will detect information feedback to control panel, the control panel is assigned the action instruction to vacuum pump 900 again, vacuum pump 900 opens immediately in order to the evacuation of preservation box 400.

Adopt magnetism proximity switch's structural style, need not the extra manual start button that triggers of user, the vacuum pump can be automatic to the crisper evacuation, realizes the intelligent and convenient design of evacuation action, improves the user and uses experience.

The magnetic part 700 is a permanent magnet, and has strong magnetism, thereby improving the reliability of position detection.

In some embodiments of the present application, a pressure sensor (not shown) is disposed on a pipeline of the vacuum connector 500 and the vacuum pump 900 for detecting the pressure in the vacuum pipeline in real time.

After placing preservation box 400 on shelf 300, magnetism proximity switch 800 detects the signal, and vacuum pump 900 begins the evacuation for the first time, stops after the evacuation to the set pressure value, after the settlement time (for example 6 h), and does not detect in this time quantum that preservation box 400 leaves shelf 300, then vacuum pump 900 opens once more, and evacuation stops after the set value once more to keep the low pressure environment in preservation box 400, improve the fresh-keeping storage effect of edible material.

Two ways are given in this application for the location of the magnetic proximity switch 800 and the magnetic part 700.

First, the magnetic proximity switch 800 is disposed at the bottom of the shelf 300, the magnetic portion 700 is disposed at the bottom of the preservation box 400, and the magnetic portion 700 is close to the magnetic proximity switch 800 when the preservation box 400 is placed on the shelf 300.

Secondly, the magnetic proximity switch 800 is arranged on the side wall of the shelf 300, the magnetic part 700 is arranged on the side wall of the preservation box 400, and the magnetic part 700 is close to the magnetic proximity switch 800 in the process of placing the preservation box 400 on the shelf 300.

Two ways are given in the present application for the location of the evacuation connector 500 and the evacuation connector 600.

First, the evacuation connector 500 is disposed at the bottom of the shelf 300, and the evacuation connector 600 is disposed at the bottom of the preservation box 400.

Secondly, the evacuation connector 500 is disposed on the sidewall of the shelf 300, and the evacuation connector 600 is disposed on the sidewall of the preservation box 400.

The position detection and the vacuum-pumping of the crisper 400 can be realized no matter the crisper is arranged at the bottom or the side.

Fig. 6 and 7 are schematic structural views showing that the evacuation connector 500 and the magnetic proximity switch 800 are disposed at the bottom of the shelf 300, and the evacuation connector 600 and the magnetic part 700 are disposed at the bottom of the fresh food box 400.

The bottom of the preservation box 400 is provided with a mounting groove (marked as a first mounting groove 410), the first mounting groove 410 is laterally opened, and the magnetic part 700 is fixedly arranged in the first mounting groove 410 through the opening.

The magnetic part 700 may be fixed in the first installation groove 410 by means of gluing.

Referring to fig. 5 and 7, the shelf 300 includes a bottom cavity 310, and the evacuation adapter 500 is disposed in the bottom cavity 310, which corresponds to the bottom cavity 310 providing an installation space for the evacuation adapter 500.

The crisper 400 is placed on the top plate 350 enclosing the bottom cavity 310 with the top of the evacuation connector 500 exposed from the top plate 350 for interfacing with the evacuation interface 600 at the bottom of the crisper 400.

In some embodiments of the present application, a side plate 340 is disposed around the bottom cavity 310, and the side plate 340 is detachably connected to the inner container of the door body 200.

Be equipped with first joint portion 341 on controlling two relative curb plates 340, corresponding, be equipped with second joint portion 210 on two relative side frames about the door body 200 inner bag, through the joint of dismantling between first joint portion 341 and the second joint portion 210, realize shelf 300's demountable installation, the regulation and the dismouting of the shelf 300 height of being convenient for.

The four side plates 340 and the top plate 350 enclose a placing groove for placing the preservation box 400, stability after the preservation box 400 is placed is improved, and dropping is avoided.

In some embodiments of the present application, the shelf 300 further includes an interior base 330, and four side panels 340 are integrally formed around the interior base 330. The interior base plate 330 forms a bottom surface of the bottom chamber 310, the top plate 350 forms a top surface of the bottom chamber 310, and the vacuum fitting 500 is disposed on the interior base plate 330.

The top plate 350 and the four side plates 340 are movably connected, for example, clamped, and when the vacuumizing connector 500 needs to be maintained, the top plate 350 is taken out, so that the whole vacuumizing connector 500 is exposed, and the maintenance is facilitated.

Referring to fig. 5, the support portion 334 is disposed on the inner bottom plate 330, the support portion 334 abuts against the top plate 350, so as to improve the installation reliability of the top plate 350, and the support portion 334 also contributes to improving the structural strength of the inner bottom plate 330.

In this embodiment, the supporting portion 334 is a plurality of supporting rib structures arranged at intervals.

In some embodiments of the present application, referring to fig. 7, an outer bottom plate 360 is further disposed at the bottom of the inner bottom plate 330, the outer bottom plate 360 and the four side plates 340 enclose a routing maintenance cavity 320, and the routing maintenance cavity 320 is located at the bottom of the bottom cavity 310.

The magnetic proximity switch 800 is arranged in the wire maintenance cavity 320, and the wire connected with the magnetic proximity switch 800 is led out from the wire maintenance cavity 320.

Like this, the evacuation pipeline of being connected with vacuum pump 900 and the wire rod of being connected with magnetic proximity switch 800 are that the subregion sets up, avoid the crisscross confusion of pipeline and wire rod, and the structural style of the line is walked to the subregion also is convenient for the maintenance of pipeline and wire rod, and inner structure is more regular.

When the magnetic proximity switch 800 needs to be maintained, the outer bottom plate 360 is detached from the bottom, and maintenance can be performed from the bottom.

The bottom cavity 310 and the trace maintenance cavity 320 are partitioned and distributed separately from each other to better realize the respective functions.

In this embodiment, the side plate 340 located on the front side is provided with a buckle structure, and the magnetic proximity switch 800 is clamped in the buckle structure to realize fixed installation. The magnetic part 700 is disposed at a front position of the bottom of the fresh food box 400 corresponding to the position of the magnetic proximity switch 800, so as to trigger the magnetic proximity switch 800 accurately and reliably.

Referring to fig. 5 and 7, a mounting groove (referred to as a second mounting groove 331) is formed on the inner bottom plate 330 toward the routing maintenance cavity 320, and the magnetic proximity switch 800 is disposed in the second mounting groove 331.

The second mounting groove 331 has another function of supporting the top plate 350, that is, referring to fig. 7, the top plate 350 abuts both the supporting part 334 and the top surface of the second mounting groove 331, further improving the reliability of the top plate 350.

In some embodiments of the present application, a plurality of crispers 400 can be placed on the shelf 300, and correspondingly, a plurality of evacuation connectors 500 are arranged in the bottom cavity 310, a plurality of magnetic proximity switches 800 are arranged in the wire maintenance cavity 320, the evacuation connectors 500 are in one-to-one correspondence with the evacuation interfaces 600 on the plurality of crispers, and the plurality of magnetic proximity switches 800 are in one-to-one correspondence with the magnetic portions 700 on the plurality of crispers, so that evacuation while the plurality of crispers are realized.

Regarding the arrangement position of the vacuum pump 900, in some embodiments of the present invention, the vacuum pump 900 is arranged on the shelf 300 to fully occupy the inner space of the shelf 300, thereby improving the compactness of the shelf 300 and maximizing the functions of the shelf 300.

Specifically, referring to fig. 4, the accommodating groove 332 is disposed in the bottom chamber 310, and the vacuum pump 900 is disposed in the accommodating groove 332.

The vacuum pump 900 is disposed in the shelf 300 such that the pipe led out from the vacuum pump 900 can be connected to the evacuation connector 500 at a short distance, and the pipe is short in distance, which helps to improve the evacuation efficiency, and the short-distance pipe helps to reduce the noise caused by the vibration of the pipe during the evacuation process.

Taking the example of two evacuation connectors disposed in the shelf 300, the vacuum pump 900 is disposed in the gap between the two evacuation connectors 500.

Referring to fig. 5, a plurality of arc-shaped clamping plates 333 are arranged in the accommodating groove 332, the arc-shaped clamping plates 333 and the inner bottom plate 330 are integrally formed, a clamping position is formed between the two opposite arc-shaped clamping plates 333, and the vacuum pump 900 is clamped on the clamping position, so that the vacuum pump can be fixed and is convenient to install.

The peripheral wall of the vacuum pump 900 is provided with a vibration damping layer (not marked), and the vibration damping layer is abutted against the arc-shaped clamping plate 333 to reduce noise.

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

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A refrigerator, comprising:

a storage chamber;

a door for opening or closing the storage chamber;

it is characterized by also comprising:

the rack is arranged on the inner container side of the door body, a vacuumizing connector is arranged on the rack and connected with a vacuum pump through a pipeline, and a magnetic proximity switch is arranged on the rack;

the preservation box is provided with a vacuumizing interface and a magnetic part;

the preservation box is placed on the shelf, the vacuumizing connector is connected with the vacuumizing interface, and the magnetic part triggers the magnetic proximity switch to enable the vacuum pump to vacuumize the preservation box.

2. The refrigerator according to claim 1,

the magnetic proximity switch is arranged at the bottom of the shelf, the magnetic part is arranged at the bottom of the preservation box, and the preservation box is placed at the middle of the shelf, and the magnetic part is close to the magnetic proximity switch.

3. The refrigerator according to claim 2,

the bottom of preservation box is equipped with the mounting groove, magnetism portion is fixed to be located in the mounting groove.

4. The refrigerator according to claim 2,

the shelf comprises a bottom cavity, the preservation box is placed on a top plate which encloses the bottom cavity, and the vacuumizing joint is arranged in the bottom cavity;

the bottom of the bottom cavity is provided with a wiring maintenance cavity, the magnetic proximity switch is arranged in the wiring maintenance cavity, and a wire connected with the magnetic proximity switch is led out from the wiring maintenance cavity.

5. The refrigerator according to claim 4,

a plurality of preservation boxes are placed on the shelf;

the bottom cavity is internally provided with a plurality of vacuumizing joints, the wiring maintenance cavity is internally provided with a plurality of magnetic proximity switches, the vacuumizing joints are in one-to-one correspondence with vacuumizing interfaces on the preservation boxes, and the magnetic proximity switches are in one-to-one correspondence with magnetic parts on the preservation boxes.

6. The refrigerator according to claim 1,

the magnetic proximity switch is arranged on the side wall of the shelf, the magnetic part is arranged on the side wall of the preservation box, and the preservation box is placed on the side wall of the shelf, wherein the magnetic part is close to the magnetic proximity switch.

7. The refrigerator according to claim 1,

the vacuumizing connector is arranged at the bottom of the shelf, and the vacuumizing connector is arranged at the bottom of the preservation box.

8. The refrigerator according to claim 1,

the vacuumizing connector is arranged on the side wall of the shelf, and the vacuumizing interface is arranged on the side wall of the preservation box.

9. The refrigerator according to any one of claims 1 to 8,

and a pressure sensor is arranged on a pipeline for communicating the vacuumizing joint with the vacuum pump.

10. The refrigerator according to any one of claims 1 to 8,

the magnetic part is a permanent magnet.

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