CN215571497U - A kind of refrigerator - Google Patents

Abstract

The utility model discloses a refrigerator, wherein a preservation box is arranged at the inner container side of a storage chamber or a door body, the preservation box is vacuumized by a vacuumizing device, an exhaust pipeline of a vacuum pump in the vacuumizing device is provided with a silencing device, the exhaust pipeline extends in a foaming layer of the door body to enable an exhaust port of the exhaust pipeline to be directly communicated with the atmosphere, and the silencing device is arranged in the foaming layer. Reduce the noise of vacuum pump through silencing device, prolong exhaust pipe simultaneously, with gaseous direct emission to the refrigerator outside, avoid parts such as steam corrosion damage vacuum pump.

Description

A kind of refrigerator

Technical Field

The utility model relates to the technical field of refrigerators, 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.

By utilizing a vacuum preservation technology, the applicant previously proposed a scheme for arranging a vacuum preservation device on a door body, specifically, a shelf base and a vacuumizing assembly are arranged on the door body, the vacuumizing assembly comprises a vacuumizing connector, a vacuum pump and a connecting pipeline, a preservation box is placed on the shelf base, the vacuumizing connector is in butt joint communication with a vacuumizing interface on the preservation box, and the vacuum pump is started to vacuumize the preservation box. And the vacuum pump can produce the noise at the during operation, reduces the use experience of refrigerator.

The applicant previously proposed a scheme of arranging the vacuum pump on the door body end cover, and the thickness of the common refrigerator door body is 65mm or more, so that a sufficient space is arranged in the end cover to install the vibration reduction layer, and the working vibration noise of the vacuum pump is reduced. However, with the product development trend of the refrigerator thin door body, a thin door body with the thickness of 45-52mm appears, so that the installation space of the vacuum pump in the end cover is reduced, the vibration reduction layer becomes thin, and the noise reduction effect is weakened.

Simultaneously, can carry certain steam when taking out the vacuum fresh-keeping in vacuum pump exhaust, if direct with gaseous emission near the vacuum pump, can cause certain corrosion damage to electronic parts such as vacuum pump, relief valve for a long time.

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, which reduces the noise of a vacuum pump by arranging a silencing device on an exhaust pipeline of the vacuum pump, simultaneously prolongs the exhaust pipeline, directly exhausts gas to the outside of the refrigerator, and avoids the parts such as the vacuum pump and the like from being damaged by water vapor corrosion.

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 preservation box is arranged in the storage chamber or on the inner container side of the door body;

the vacuumizing device comprises a vacuum pump and is used for vacuumizing the preservation box;

a silencer is arranged on an exhaust pipeline of the vacuum pump;

the exhaust pipeline extends in the foaming layer of the door body so that an exhaust port of the exhaust pipeline is directly communicated with the atmosphere, and the silencing device is arranged in the foaming layer.

In some embodiments of the present application, the acoustic abatement device comprises a resistive muffler and/or a resistive muffler.

In some embodiments of the present application, the muffler device includes a resistive muffler and a resistive muffler, the resistive muffler being located upstream of the resistive muffler in the exhaust direction.

In some embodiments of this application, anti type muffler is including dismantling sealing connection's last casing and lower casing, go up the casing with casing connection forms the amortization chamber down, upward be equipped with first suction nozzle on the casing, be equipped with first play gas nozzle on the casing down, first suction nozzle with first play gas nozzle all with amortization chamber intercommunication.

In some embodiments of the present application, a ratio of an air inlet aperture of the first air inlet nozzle to an inner diameter of the silencing cavity is 1: (20-35).

In some embodiments of the present application, the lower casing faces the end face of the upper casing, a first annular groove is formed in the end face of the lower casing, a first annular protrusion is formed in the end face of the upper casing, the first annular protrusion is arranged in the first annular groove, and a sealant is filled in the first annular groove.

In some embodiments of this application, be equipped with spacing portion on the casing down, spacing portion includes first spacing muscle and the spacing muscle of second of L type body structure, it is equipped with breach portion to go up to correspond on the casing, first spacing muscle with the lateral wall of breach portion supports and leans on, the spacing muscle of second paste lean on in the surface of going up the casing.

In some embodiments of the present application, the resistive muffler includes a housing, a cavity is formed in the housing, and a sound absorbing material is filled in the cavity;

the shell comprises a bottom shell and an upper cover, a second air inlet nozzle is arranged on the bottom shell, a second air outlet nozzle is arranged on the upper cover, the exhaust pipeline is connected with the second air inlet nozzle, and the bottom shell is detachably and hermetically connected with the upper cover.

In some embodiments of this application, the door body includes two relative first end covers and second end cover, be equipped with the installation cavity on the first end cover, the vacuum pump is located in the installation cavity, exhaust pipe certainly the installation cavity is drawn forth and is in extend to in the foaming layer of the door body second end cover department, be equipped with the exhaust hole on the second end cover, exhaust pipe's exhaust end with exhaust hole intercommunication.

In some embodiments of the present application, the pipe diameter of the exhaust pipeline between the vacuum pump and the muffler device is smaller than the pipe diameter of the exhaust pipeline between the muffler device and the exhaust hole.

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

in the refrigerator disclosed in the application, be equipped with silencing device on the exhaust pipe of the vacuum pump among the evacuating device, reduce the noise of vacuum pump, improve the use of refrigerator and experience. Especially for the refrigerator with a thin door body, the noise reduction device can make up the defect of noise reduction and weakening caused by thinning of the vibration reduction layer of the vacuum pump so as to ensure the noise reduction effect of the vacuum pump.

The exhaust pipeline extends in the foaming layer of the door body so that an exhaust port of the exhaust pipeline is directly communicated with the atmosphere, and the silencing device is arranged in the foaming layer. The exhaust is directly exhausted to the atmosphere instead of the space area near the vacuum pump, thereby avoiding the parts such as the vacuum pump and the like from being damaged by water vapor corrosion and prolonging the service life of the parts such as the vacuum pump and the like.

Through the extension of exhaust pipe in the foaming layer for the extension of exhaust pipe plays certain decay to the exhaust noise, helps further improving noise reduction.

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 an interior of a door body according to an embodiment;

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

FIG. 4 is a cross-sectional view of a resistive muffler according to an embodiment;

FIG. 5 is a schematic view of a resistive muffler according to an embodiment;

fig. 6 is a cross-sectional view of a resistive muffler according to an embodiment.

Reference numerals:

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

200-a door body, 210-a door body shell, 220-an inner container, 230-a first end cover, 231-an installation cavity, 240-a second end cover and 250-a shelf;

300-a box body;

400-preservation box;

500-vacuum pump, 510-air inlet pipeline, 520-exhaust pipeline;

600-vacuum joint;

700-resistance type silencer, 710-shell main body, 711-second air inlet nozzle, 712-second annular groove, 713-second limiting part, 7131-third limiting rib, 7132-fourth limiting rib, 720-cover body, 721-second air outlet nozzle, 722-second annular protrusion, 723-second gap part, 724-plate rib and 730-sound absorbing material;

800-reactance type muffler, 810-upper shell, 811-first inlet nozzle, 812-first annular protrusion, 813-first gap part, 820-lower shell, 821-first outlet nozzle, 822-first annular groove, 823-first limiting part, 8231-first limiting rib, 8232-second limiting rib and 830-silencing cavity.

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 refrigerator has an external appearance defined by a storage chamber 100 defining a storage space, and a plurality of door bodies 200 disposed in the storage chamber 100, wherein the door bodies 200 include a door body outer case 210 located outside the storage chamber 100, a door body inner container 220 located inside the storage chamber 100, a first end cap 230, a second end cap 240, and a foaming layer located between the door body outer case 210, the door body inner container 220, the first end cap 230, and the second end cap 240. The first end cap 230 and the second end cap 240 are vertically opposed to each other, defining the first end cap 230 at the top and the second end cap 240 at the bottom.

The storage chamber 100 has an open cabinet 300, and the storage chamber 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 in this application still includes crisper 400 and evacuating device, and evacuating device is used for the evacuation to crisper 400 to reach the required low pressure environment of fresh-keeping storage in the crisper 400.

The fresh food box 400 may be provided in the storage compartment 100 or at the inner container 220 side of the door body.

The application takes the preservation box 400 as an example, which is arranged on the inner container 220 side of the door body. The shelf 250 is arranged on the inner container 220 side of the door body, and the preservation box 400 is placed on the shelf 250. The vacuum pumping device includes a vacuum pumping connector 600, a vacuum pump 500, and a vacuum pumping pipeline connected therebetween. The preservation box 400 is placed on the shelf 250, the vacuumizing connector 600 is in butt joint communication with the vacuumizing interface on the preservation box 400, and the vacuum pump 500 is started to vacuumize the preservation box 400.

The vacuum pump 500 is disposed in the first end cap 230 or the second end cap 240, and the vacuum pump 500 is disposed on the first end cap 230 in this embodiment.

Referring to fig. 2, an installation cavity 231 with an open top is formed in the first end cap 230, the vacuum pump 500 is disposed in the installation cavity 231, and a detachable cover plate (not shown) is disposed at the open top of the installation cavity 231. The vacuum pump 500 can be maintained by detaching the cover plate.

The installation of the vacuum pump 500 is realized by fully utilizing the inner space of the first end cover 230, and no additional space is occupied.

The damping layer wrapped on the outer peripheral wall of the vacuum pump 500 may be made of foam, such as EPDM foam, having a thickness of 3-5 mm.

Be equipped with silencing device on the exhaust pipe 520 of vacuum pump, can further reduce vacuum pump 500's noise through silencing device, improve the use of refrigerator and experience.

Especially for the refrigerator with a thin door body, the noise reduction device can make up the defect of noise reduction and weakening caused by thinning of the vibration reduction layer of the vacuum pump 500 so as to ensure the noise reduction effect of the vacuum pump.

The exhaust duct 520 extends in the foamed layer of the door body 200 so that the exhaust port of the exhaust duct 520 is directly communicated with the atmosphere, and the muffler device is provided in the foamed layer.

The exhaust is directly exhausted to the atmosphere instead of the space area near the vacuum pump 500, thereby avoiding the steam corrosion from damaging the components such as the vacuum pump 500 and the like and prolonging the service life of the components such as the vacuum pump 500 and the like.

Through the extension of exhaust pipe 520 in the foaming layer for exhaust pipe 520 extension plays certain decay to exhaust noise, helps further to improve noise reduction.

In some embodiments of the present application, the exhaust pipe 520 is led out from the installation cavity 231 and extends to the second end cap 240 in the foaming layer of the door body 200, the second end cap 240 is provided with an exhaust hole (not labeled), and the exhaust end of the exhaust pipe 520 is communicated with the exhaust hole.

Exhaust pipe 520 is extended to second end cap 240 department by first end cap 230 department, runs through the direction of height of whole door body 200, on the one hand, prolongs exhaust pipe 520 as far as possible, sets up through the reasonable change of pipe diameter, improves the attenuation to the noise, improves the noise reduction effect, and on the other hand, the second end cap 240 department that is located the lower part is located in the exhaust hole, can effectively avoid the foreign matter to get into and block up exhaust pipe 520 through the exhaust hole, guarantees carminative smooth and easy nature.

With the above-mentioned "reasonable variation setting of pipe diameter", in some embodiments of the present application, the pipe diameter of the exhaust pipe between the vacuum pump 500 and the muffler device is smaller than the pipe diameter of the exhaust pipe between the muffler device and the exhaust hole.

The pipe diameter of the exhaust pipeline at the tail end is increased, a certain expansion and noise reduction effect is achieved, and meanwhile the exhaust efficiency can be improved.

With respect to the placement of the acoustic abatement device, in some embodiments of the present application, the acoustic abatement device includes a resistive muffler and/or a resistive muffler.

In the structure shown in fig. 2, the silencer includes an anti-type silencer 800 and a resistive silencer 700, which are connected in series through a pipeline to form a resistive composite silencer, so as to improve the silencing and noise reduction effects.

Because the resistance type silencer has a good noise reduction effect on sound waves in a specific wavelength range, the resistance type silencer can play a noise reduction effect on sound waves of all wavelengths, along the exhaust direction, the resistance type silencer is positioned at the upstream of the resistance type silencer, sound wave noise in most specific wavelength ranges is eliminated through the resistance type silencer firstly, and then secondary supplement noise reduction is carried out through the resistance type silencer, so that the noise reduction effect is improved.

Regarding the specific structure of the anti-type muffler 800, in some embodiments of the present application, referring to fig. 3 and 4, the anti-type muffler 800 includes an upper housing 810 and a lower housing 820 detachably and hermetically connected, the upper housing 810 and the lower housing 820 are connected to form a muffling chamber 830, a first air inlet nozzle 811 is disposed on the upper housing 810, a first air outlet nozzle 821 is disposed on the lower housing 820, and both the first air inlet nozzle 811 and the first air outlet nozzle 821 are communicated with the muffling chamber 830.

The air inlet aperture of the first air inlet nozzle 811 is smaller than the inner diameter of the silencing cavity 830, air in the exhaust pipeline 520 enters the silencing cavity 830 through the first air inlet nozzle 811, the silencing and noise reduction effects are achieved through the expansion effect of the silencing cavity 830, and then the air is exhausted through the first air outlet nozzle 821.

In this embodiment, the ratio of the air inlet aperture of the first inlet nozzle 811 to the inner diameter of the silencing chamber 830 is 1: (20-35) to achieve the best noise reduction effect.

For the sealing connection structure between the upper housing 810 and the lower housing 820, in some embodiments of the present application, a first annular groove 822 is disposed on an end surface of the lower housing 820 facing the upper housing 810, a first annular protrusion 812 is disposed on an end surface of the upper housing 810 facing the lower housing 820, the first annular protrusion 812 is disposed in the first annular groove 822, and a sealant is filled in the first annular groove 822, so as to implement the sealing connection.

In order to further improve the reliability of the sealing connection between the upper housing 810 and the lower housing 820, in some embodiments of the present application, the lower housing 820 is provided with a limiting portion (marked as a first limiting portion 823), the limiting portion 823 includes a first limiting rib 8231 and a second limiting rib 8232 of an L-shaped integrated structure, the upper housing 810 is correspondingly provided with a notch portion (marked as a first notch portion 813), the first limiting rib 8231 abuts against the side wall of the first notch portion 813, and the second limiting rib 8232 abuts against the outer surface of the upper housing 810.

During installation, first annular protrusion 812 is embedded into first annular groove 822, then upper shell 810 and lower shell 820 rotate relatively, when first limiting rib 8231 abuts against the lateral wall of first gap portion 813, screwing is in place, and at the moment, second limiting rib 8232 abuts against the outer surface of upper shell 810, so that further extrusion limiting effect is achieved on upper shell 810.

Regarding the specific structure of the resistive muffler 700, in some embodiments of the present application, referring to fig. 5 and 6, the resistive muffler 700 includes a housing, a cavity is formed in the housing, and the cavity is filled with a sound-absorbing material 730.

When the exhaust gas flows through the resistive muffler, the sound absorbing material 730 is used to reduce noise.

The sound-absorbing material 730 is polyester fiber sound-absorbing cotton and/or glass fiber sound-absorbing cotton.

Inhale the sound cotton and can adopt the lamellar structure, the multi-disc is inhaled the sound cotton and is piled up in the cavity, improves and inhales the sound effect.

Regarding the specific structure of the housing, in some embodiments of the present application, the housing includes a housing main body 710 and a cover 720, a second air inlet nozzle 711 is disposed on the housing main body 710, a second air outlet nozzle 721 is disposed on the cover 720, an exhaust pipe 520 of the vacuum pump is connected to the second air inlet nozzle 711, and the housing main body 710 and the cover 720 are detachably and hermetically connected.

The detachable connection of the case main body 710 and the cover body 720 facilitates the filling of the sound-absorbing material 730 therein. During production, the sound-absorbing material 730 is filled in the cavity of the shell body 710, and then the cover body 720 is fastened, so that the processing is facilitated.

For the sealing structure between the casing main body 710 and the cover 720, in some embodiments of the present application, a second annular groove 712 is disposed on an end surface of the casing main body 710 facing the cover 720, a second annular protrusion 722 is disposed on an end surface of the cover 720 facing the casing main body 710, the second annular protrusion 722 is disposed in the second annular groove 712, and a sealant is filled in the second annular groove 712 to achieve the sealing connection.

In order to further improve the reliability of the sealing connection between the case main body 710 and the cover 720, in some embodiments of the present application, a second limiting portion 713 is disposed on the case main body 710, the second limiting portion 713 includes a third limiting rib 7131 and a fourth limiting rib 7132 that are L-shaped integrated structures, a second gap portion 723 is correspondingly disposed on the cover 720, the third limiting rib 7131 abuts against a side wall of the second gap portion 723, and the fourth limiting rib 7132 abuts against an outer surface of the cover 720.

When the cover 720 is installed, the second annular protrusion 722 is first embedded into the second annular groove 712, and then the cover 720 is screwed, when the third limiting rib 7131 abuts against the lateral wall of the second gap 723, the cover 720 is screwed in place, and at this time, the fourth limiting rib 7132 abuts against the outer surface of the cover 720, so as to further limit the cover 720 by extrusion.

The two opposite sides of the outer peripheral wall of the second air outlet nozzle 721 are respectively provided with a plate-shaped rib 724, and when the cover body 720 is screwed, the two plate-shaped ribs 724 increase the acting area of the hand, so that the operation is convenient.

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;

the preservation box is arranged in the storage chamber or on the inner container side of the door body;

the vacuumizing device comprises a vacuum pump and is used for vacuumizing the preservation box;

it is characterized in that the preparation method is characterized in that,

a silencer is arranged on an exhaust pipeline of the vacuum pump;

the exhaust pipeline extends in the foaming layer of the door body so that an exhaust port of the exhaust pipeline is directly communicated with the atmosphere, and the silencing device is arranged in the foaming layer.

2. The refrigerator according to claim 1,

the silencer device comprises a resistive silencer and/or a resistive silencer.

3. The refrigerator according to claim 2,

the muffler device includes a resistive muffler and a resistive muffler, the resistive muffler being located upstream of the resistive muffler in the exhaust direction.

4. The refrigerator according to claim 2,

the anti type muffler is including dismantling sealing connection's last casing and lower casing, go up the casing with casing connection forms the amortization chamber down, upward be equipped with first suction nozzle on the casing, be equipped with first play gas nozzle down on the casing, first suction nozzle with first play gas nozzle all with amortization chamber intercommunication.

5. The refrigerator according to claim 4,

the ratio of the air inlet aperture of the first air inlet nozzle to the inner diameter of the silencing cavity is 1: (20-35).

6. The refrigerator according to claim 4,

the lower casing is towards be equipped with first annular groove on the terminal surface of last casing, go up the casing orientation be equipped with first annular arch on the terminal surface of casing down, first annular arch is located in the first annular groove, sealed glue is filled in the first annular groove.

7. The refrigerator according to claim 6,

be equipped with spacing portion down on the casing, spacing portion includes the first spacing muscle and the spacing muscle of second of L type body structure, it is equipped with breach portion to go up to correspond on the casing, first spacing muscle with the lateral wall of breach portion supports and leans on, the spacing muscle of second paste lean on in the surface of last casing.

8. The refrigerator according to claim 2,

the resistance type silencer comprises a shell, wherein a cavity is formed in the shell, and sound-absorbing materials are filled in the cavity;

the shell comprises a bottom shell and an upper cover, a second air inlet nozzle is arranged on the bottom shell, a second air outlet nozzle is arranged on the upper cover, the exhaust pipeline is connected with the second air inlet nozzle, and the bottom shell is detachably and hermetically connected with the upper cover.

9. The refrigerator according to any one of claims 2 to 8,

the door body includes two relative first end covers and second end cover, be equipped with the installation cavity on the first end cover, the vacuum pump is located in the installation cavity, exhaust pipe certainly the installation cavity is drawn forth and is in extend to in the foaming layer of the door body second end cover department, be equipped with the exhaust hole on the second end cover, exhaust pipe's exhaust end with exhaust hole intercommunication.

10. The refrigerator according to claim 9,

the pipe diameter of the exhaust pipeline between the vacuum pump and the silencing device is smaller than that of the exhaust pipeline between the silencing device and the exhaust hole.

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