CN115111866B

CN115111866B - Refrigerator and air extractor thereof

Info

Publication number: CN115111866B
Application number: CN202110303034.8A
Authority: CN
Inventors: 赵弇锋; 万彦斌; 王文椿; 陈建全; 王少一
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2023-07-14
Anticipated expiration: 2041-03-22
Also published as: CN115111866A

Abstract

The invention provides a refrigerator and an air extractor thereof, wherein the air extractor comprises a base, a vacuum pump and a vibration reduction sleeve, at least one fresh-keeping box is arranged on the base, an installation cavity is defined in the base, the vacuum pump is arranged in the installation cavity, an inlet of the vacuum pump is connected with the fresh-keeping box and is used for extracting part or all of air in the fresh-keeping box, the vibration reduction sleeve comprises a main body part sleeved outside the vacuum pump and a plurality of connecting parts formed on two sides of the main body part, and clamping parts matched with the connecting parts are respectively formed on two sides of the main body part on the inner wall of the installation cavity so as to pre-connect the vibration reduction sleeve with the wall surface of the installation cavity. The vibration damping sleeve is connected with the inner wall of the mounting cavity in advance, so that the vibration of the vacuum pump can be effectively reduced and transmitted to the base, and the connecting part and the clamping part are clamped and matched, so that working procedures such as mounting and dismounting can be conveniently carried out by workers.

Description

Refrigerator and air extractor thereof

Technical Field

The invention relates to the technical field of refrigeration and freezing, in particular to a refrigerator and an air extractor thereof.

Background

Along with the improvement of the living standard of people, the demands of consumers on the refrigerator are also higher, and in order to improve the fresh-keeping performance of the refrigerator, the refrigerator with the vacuumizing function appears in the prior art and is favored by the consumers. The principle of the refrigerator is that a certain compartment of the refrigerator is vacuumized by the vacuum pump, but the vacuum pump often vibrates more when in work, so that the noise of the refrigerator is increased.

In order to solve the above-mentioned drawbacks, vibration damping treatment has also been performed on the vacuum pump in the prior art, specifically, by arranging vibration damping members around the vacuum pump and arranging the vibration damping members outside the vibration damping members in a housing connected to the refrigerator. However, this method has a certain disadvantage in that the vibration absorbing member has a certain vibration absorbing effect, but it cannot effectively reduce the vibration of the vacuum pump after being connected to the refrigerator because the housing is made of a rigid material.

Therefore, how to reduce the transmission of the vibration of the vacuum pump to the outside is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

It is an object of the present invention to overcome at least one of the drawbacks of the prior art and to provide a refrigerator and an air extracting device thereof.

A further object of the present invention is to provide a vacuum pump vibration damping sleeve that reduces the transmission of vibration from the vacuum pump vibration damping sleeve to the base and that facilitates the installation and removal of the vacuum pump and vibration damping sleeve by personnel.

Another further object of the present invention is to isolate the stationary cover from the inner wall of the mounting chamber by means of a connection, avoiding rigid collisions and slowing down the transmission of vibrations of the vacuum pump outwards through the stationary cover.

It is a still further object of the present invention to reduce the contact area of the damping sleeve with the stationary cover and to slow down the transmission of vibrations of the vacuum pump outwardly through the stationary cover.

In particular, the present invention provides an air extracting apparatus for a refrigerator, comprising:

the base is provided with at least one preservation box, and an installation cavity is defined in the base;

the vacuum pump is arranged in the mounting cavity, and an inlet of the vacuum pump is connected with the preservation box and is used for pumping part or all of gas in the preservation box; and

the vibration damping sleeve comprises a main body part sleeved on the outer side of the vacuum pump and a plurality of connecting parts formed on two sides of the main body part, and clamping parts matched with the connecting parts are respectively formed on two sides of the main body part on the inner wall of the installation cavity so as to pre-connect the vibration damping sleeve with the wall surface of the installation cavity.

Further, the air extracting device further comprises:

and the fixed cover is buckled on the main body part and is connected with the inner wall of the mounting cavity through a fastener so as to fix the vacuum pump and the vibration damping sleeve.

Further, the main body part is cylindrical; and is also provided with

The inside of fixed cover is formed with the accommodation chamber with main part appearance looks adaptation to fixed cover and connecting portion relative position department have seted up the breach that is used for dodging connecting portion.

Further, the fixed cover is also provided with an opening which allows the inlet pipeline and the outlet pipeline of the vacuum pump to penetrate out of the fixed cover respectively, the inlet pipeline and the outlet pipeline of the vacuum pump are also respectively sleeved with a vibration damping ring, the outer sides of the vibration damping rings are in contact with the opening, so that the two pipelines are fixed on the fixed cover, and the vibration of the vacuum pump is reduced to be conducted outwards.

Further, a plurality of vibration-damping ribs are formed on the outer circumferential surface of the main body portion at intervals in the axial direction, and are configured to collide with the inner surface of the stationary cover by the vibration-damping ribs to reduce vibration transmission of the vacuum pump to the outside.

Further, the ratio of the height of the vibration-damping ribs to the wall thickness of the main body portion is between 1/6 and 1/3.

Further, the clamping part is formed on the top wall of the mounting chamber; and is also provided with

After the damping sleeve is secured, the damping ribs abut against the top wall of the mounting chamber to reduce the outward conduction of vibrations of the vacuum pump.

Further, the air extracting device further comprises:

the silencer is arranged in the mounting cavity, and the inlet of the silencer is connected with the outlet of the vacuum pump so as to reduce noise generated by exhaust of the vacuum pump.

Further, the vibration damping sleeve is made of rubber or silica gel materials.

In particular, the present invention also provides a refrigerator including: the door body and the air extractor of any one of the above, the air extractor is arranged on the inner side of the door body.

In the air extractor, the mounting cavity is defined in the base, the vacuum pump is arranged in the mounting cavity and is used for vacuumizing the preservation box arranged on the base, the main body part of the vibration damping sleeve is sleeved outside the vacuum pump, the connecting parts are formed on two sides of the main body part, and the clamping parts matched with the connecting parts are respectively formed on two sides of the main body part on the inner wall of the mounting cavity so as to pre-connect the vibration damping sleeve with the wall surface of the mounting cavity, thus not only effectively reducing the transmission of vibration of the vacuum pump to the base, but also facilitating the working procedures of mounting and dismounting by workers through the clamping fit of the connecting parts and the clamping parts.

Further, in the air extractor of the present invention, since the fixing cover is fastened to the main body, the fixing cover is connected to the inner wall of the installation chamber by the fastening member, and the damping sleeve is fixed to the wall surface of the installation chamber in advance by the connecting portion and the fastening portion, in order to enable the fixing cover to be tightly connected to the wall surface of the installation chamber, the fixing cover is provided with the notch at the position opposite to the connecting portion, and in the process of fixing the vacuum pump by the fixing cover, the connecting portion can extend into the notch, so that the fixing cover is prevented from being unable to be connected to the inner wall of the installation chamber. More importantly, the fixed cover needs to be connected with the inner wall of the installation cavity, and the connecting part can extend into the notch after the fixed cover is fixed, that is, the connecting part is arranged between the fixed cover and the inner wall of the installation cavity, so that the fixed cover is separated from the inner wall of the installation cavity through the connecting part, rigid collision is avoided, and the vibration of the vacuum pump is further slowed down to be transmitted outwards.

Further, in the air extractor of the present invention, a plurality of vibration-damping ribs are formed on the outer circumferential surface of the main body portion at intervals along the axial direction, and when the fixed cover is fastened to the main body portion and fixed, the vibration-damping ribs collide with the inner surface of the fixed cover to reduce the vibration transmission of the vacuum pump. That is, when the fixed cover is fastened to the main body, the main body and the inner wall of the fixed cover do not form surface contact, but the plurality of vibration-damping ribs are in line contact with the inner wall of the fixed cover, and the line contact reduces the contact area between the vibration-damping sleeve and the fixed cover, thereby being beneficial to greatly reducing the vibration conduction of the vacuum pump.

The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

fig. 1 is a schematic view of a refrigerator according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the mounting relationship of a refrigerator door and an air extractor according to one embodiment of the present invention;

FIG. 3 is a schematic view of an air extracting device in a refrigerator according to an embodiment of the present invention;

FIG. 4 is a bottom view of an air extractor in a refrigerator according to one embodiment of the present invention;

FIG. 5 is an exploded view of an air extractor according to one embodiment of the present invention, with the fresh box hidden;

FIG. 6 is a bottom view of the base of the suction device showing the snap-fit on the top wall of the mounting chamber, according to one embodiment of the invention;

FIG. 7 is a schematic view of a damping sleeve in an air extractor according to one embodiment of the present invention;

FIG. 8 is a schematic view of a stationary shroud in an air extractor according to one embodiment of the present invention;

FIG. 9 is a schematic illustration of the mounting relationship of a damping sleeve to a stationary shroud in an air extractor according to one embodiment of the present invention;

FIG. 10 is a schematic view of a vibration damping ring in an air extractor according to one embodiment of the present invention.

Detailed Description

In the description of the present embodiment, it is to be understood that the directions or positional relationships indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "depth", etc. are based on the directions of the refrigerator in a normal use state as a reference, and can be determined with reference to the directions or positional relationships shown in the drawings, for example, "front" indicating directions means a side of the refrigerator 1 toward a user. This is merely to facilitate describing the invention and to simplify the description and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation and therefore should not be construed as limiting the invention.

In the description of the present embodiment, a description referring to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1, fig. 1 is a schematic view of a refrigerator according to an embodiment of the present invention. The present invention proposes a refrigerator 1, which may generally include a cabinet 10 and a door 20.

The cabinet 10 defines at least one open-front storage compartment, and typically a plurality of compartments, such as a refrigerator compartment, a freezer compartment, a temperature change compartment, and the like. The number and function of particular storage compartments may be configured according to the needs in advance.

In some embodiments, the storage temperature of the refrigerator compartment may be 2-9 ℃, or may be 4-7 ℃; the storage temperature of the freezing chamber may be-22 to-14 ℃, or may be-20 to 16 ℃. The freezing chamber may be disposed below the refrigerating chamber, and the variable temperature chamber may be disposed between the freezing chamber and the refrigerating chamber. The temperature in the freezer compartment is typically in the range of-14 to-22 ℃. The temperature changing chamber can be adjusted according to the requirements to store proper foods or be used as a fresh-keeping storage chamber.

Referring to fig. 1, in the present embodiment, the refrigerator 1 may further include a plurality of door bodies 20, and the door bodies 20 may be disposed at a front side of the refrigerator body 10 for opening and closing the storage compartments.

For example, the door 20 may be provided at one side of the front of the case 10 in a hinged manner, and the storage compartments may be opened and closed in a pivotal manner, and the number of the door 20 may be matched with the number of the storage compartments, so that the storage compartments may be opened individually one by one. For example, a refrigerating chamber door, a freezing chamber door and a temperature changing chamber door may be provided for the refrigerating chamber, the freezing chamber and the temperature changing chamber, respectively. In some alternative embodiments, the door body 20 may also take the form of a side-by-side door, a side-sliding door, a sliding door, or the like.

The storage compartment can be provided with cold energy by a refrigerating system so as to realize a refrigeration, freezing and temperature-changing storage environment. The refrigeration system may be a refrigeration cycle system composed of a compressor, a condenser, a throttle device, an evaporator, and the like. The evaporator is configured to provide cooling directly or indirectly to the storage compartment.

For example, in a compression-type direct-cooling refrigerator, an evaporator may be disposed outside or inside a rear wall surface of a refrigerator liner; in the compressed air-cooled refrigerator, an evaporator chamber is further arranged in the refrigerator body 10, the evaporator chamber is communicated with the storage compartment through an air path system, an evaporator is arranged in the evaporator chamber, and a fan is arranged at an outlet of the evaporator chamber so as to circularly refrigerate the storage compartment.

Since the above-mentioned case 10, door 20 and refrigeration system are well known and easily implemented by those skilled in the art, the case 10, door 20 and refrigeration system are not described in detail in order to not obscure and obscure the invention of the present application.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating an installation relationship between a refrigerator door and an air extractor according to an embodiment of the present invention. In some embodiments, the refrigerator 1 may further include one or more air extraction devices 30, and the air extraction devices 30 may be disposed inside any one of the door bodies 20.

The air extractor 30 has a vacuumizing function, and can provide a sealed space for precious food materials (such as ginseng, sea cucumber, medlar, tonic materials, seasonings, etc.) stored in the air extractor 30, and perform vacuumizing treatment in the sealed space, so that oxidation and deterioration are reduced, and the food materials are prevented from being tainted. In addition, because the air extractor 30 is arranged on the inner side of the door body 20, the user can conveniently take the food at any time without going to the deep position of the box body 10 to take and put the food.

Referring to fig. 3 to 7, fig. 3 is a schematic view of an air extractor in a refrigerator according to an embodiment of the present invention, fig. 4 is a bottom view of the air extractor in the refrigerator according to an embodiment of the present invention, fig. 5 is an exploded view of the air extractor according to an embodiment of the present invention, which conceals a fresh box, fig. 6 is a bottom view of a base in the air extractor according to an embodiment of the present invention, which shows a clamping portion on a top wall of a mounting chamber, and fig. 7 is a schematic view of a vibration damping sleeve in the air extractor according to an embodiment of the present invention.

Specifically, the air extractor 30 may include a base 100, a vacuum pump 200, and a damping sleeve 300.

At least one fresh keeping box 500 is provided on the base 100, a mounting chamber is defined in the base 100, the mounting chamber may have a mounting port opened downward, and a bottom cover 140 for closing the mounting chamber is provided at the mounting port.

The vacuum pump 200 is disposed in the mounting chamber, and an inlet of the vacuum pump 200 is connected to the fresh box 500 for pumping part or all of the gas in the fresh box 500.

The damping sleeve 300 may include a main body portion 310 sleeved outside the vacuum pump 200 and a plurality of connection portions 320 formed at both sides of the main body portion 310, and the inner wall of the installation chamber is respectively formed at both sides of the main body portion 310 with the clamping portions 112 engaged with the plurality of connection portions 320 to pre-connect the damping sleeve 300 with the wall surface of the installation chamber.

Referring to fig. 3, the base 100 is provided with a plurality of concave portions 120 for fixing the fresh-keeping boxes 500, the plurality of fresh-keeping boxes 500 can be clamped in the concave portions 120 in a one-to-one correspondence manner, and the bottom of the concave portion 120 is further provided with air inlets 130 communicated with the fresh-keeping boxes 500.

Referring to fig. 3, the vacuum pump 200 is disposed in the installation chamber, an inlet of the vacuum pump 200 is connected to the air inlet hole 130 through the air inlet pipe 610, and an outlet of the vacuum pump 200 is connected to the air outlet pipe 620. When the vacuum pump 200 operates, the air in the preservation box 500 is pumped out, so that a vacuum environment is formed in the preservation box 500, and the requirements of users on vacuum preservation are met.

Since the vibration of the vacuum pump 200 is large during operation, the structure of the refrigerator 1 is easily affected and noise is generated, and in order to reduce the vibration of the vacuum pump 200 from being transmitted outwards, the vibration damping sleeve 300 is further sleeved on the outer side of the vacuum pump 200, and the vibration damping sleeve 300 may be made of an elastic material, such as rubber or silica gel.

Referring to fig. 5 and 7, a space for installing the vacuum pump 200 and a motor thereof is defined inside the body portion 310 of the damping sleeve 300, and an outlet of the vacuum pump 200 may protrude from one end of the body portion 310. The plurality of connection parts 320 may be uniformly disposed at both sides of the body part 310, and each connection part 320 may include a connection bar 322 and a jaw 324, the connection bar 322 may extend outwardly from an outer circumferential wall of the body part 310, and the jaw 324 may be formed at a free end of the connection bar 322.

Referring to fig. 6, preferably, the clamping portion 112 may be disposed on the top wall 110 of the installation chamber, and the top wall 110 of the installation chamber of the clamping portion 112 is correspondingly disposed at positions on both sides of the main body portion 310 to cooperate with the jaws 324 to fixedly suspend the vacuum pump 200 and the damping sleeve 300 from the top wall 110 of the installation chamber.

Since the fresh box 500 is provided on the base 100, the installation chamber is formed inside the base 100, and thus, it is convenient to hang the vacuum pump 200 at the top wall 110 of the installation chamber so that the vacuum pump 200 can be connected with the fresh box 500.

As described in the background section, the prior art also shows a solution for damping the vibration of the vacuum pump 200, which is: vibration damping members are provided around the vacuum pump 200, and are provided outside the vibration damping members in a housing to which the refrigerator 1 is connected. However, this method has a certain disadvantage in that the vibration absorbing member has a certain vibration absorbing effect, but it cannot effectively reduce the vibration of the vacuum pump after being connected to the refrigerator because the housing is made of a rigid material.

In order to overcome the above-mentioned drawbacks of the prior art, the air extractor 30 of the present embodiment adopts a method of connecting the damping sleeve 300 to the inner wall of the installation chamber in advance, that is, fixedly connecting the clamping portion 112 with the connecting portion 320. That is, the vibration damping sleeve 300 in the present embodiment is directly connected with the base 100, so that not only can the transmission of the vibration of the vacuum pump 200 to the base 100 be effectively slowed down, but also the clamping engagement of the connecting portion 320 and the clamping portion 112 can facilitate the working procedures such as installation and disassembly by the staff.

Referring to fig. 5, 8 and 9, fig. 8 is a schematic view of a fixing cover in an air extracting device according to an embodiment of the present invention, and fig. 9 is a schematic view of a mounting relationship between a vibration damping sleeve and the fixing cover in the air extracting device according to an embodiment of the present invention.

In some embodiments, the suction device 30 may further include a fixing cap 400, where the fixing cap 400 is fastened to the main body portion 310 and connected to an inner wall of the installation chamber by a fastener (e.g., a screw, etc.) to fix the vacuum pump 200 and the vibration damping sleeve 300.

When assembling the air extractor 30, the plurality of connection portions 320 are first engaged with the engagement portions 112, respectively, so that the damping sleeve 300 and the vacuum pump 200 are fixed to the inner wall of the installation chamber in advance, and then covered on the main body portion 310 by the fixing cover 400.

A plurality of connection rings 410 may be disposed around the fixing cover 400, and each connection ring 410 is provided with a connection hole 420, and a fastening member may pass through the connection hole 420 of the fastening member and then be connected with the inner wall of the installation chamber. Thus, the fixing cover 400 can not only further fix the damping sleeve 300 and the vacuum pump 200, but also protect the damping sleeve 300.

Referring to fig. 7 to 9, the main body 310 may be configured to be cylindrical, a receiving cavity adapted to the outer shape of the main body 310 is formed in the fixed cover 400, and a gap 430 for avoiding the connecting portion 320 is formed at a position of the fixed cover 400 opposite to the connecting portion 320.

Since the fixing cover 400 is fastened to the main body 310, the fixing cover 400 is connected to the inner wall of the installation cavity by the fastening member, and the damping sleeve 300 is fixed to the wall of the installation cavity in advance by the connection portion 320 and the fastening portion 112, the fixing cover 400 is provided with the notch 430 at a position opposite to the connection portion 320 in order to enable the fixing cover 400 to be tightly connected to the wall of the installation cavity, and the connection portion 320 can extend into the notch 430 during the fixing of the vacuum pump 200 by the fixing cover 400, so that the fixing cover 400 cannot be connected to the inner wall of the installation cavity.

In addition, the fixing cover 400 needs to be connected with the inner wall of the installation chamber, and the connection part 320 can extend into the notch 430 after fixing, that is, the connection part 320 is disposed between the fixing cover 400 and the inner wall of the installation chamber, so that the fixing cover 400 is separated from the inner wall of the installation chamber by the connection part 320, thereby avoiding rigid collision and further slowing down the vibration transmission of the vacuum pump 200.

Referring to fig. 5, 8 and 9, further, an opening 440 is formed in the fixed cover 400 to allow the inlet pipe 210 and the outlet pipe 220 of the vacuum pump 200 to pass through the fixed cover 400, and vibration-damping rings 230 are respectively sleeved on the inlet pipe 210 and the outlet pipe 220 of the vacuum pump 200, and the outer sides of the vibration-damping rings 230 contact with the opening 440, so as to fix the two pipes on the fixed cover 400 and reduce the vibration transmission of the vacuum pump 200.

Referring to fig. 9 and 10, fig. 10 is a schematic view of a vibration damping ring in an air extractor according to an embodiment of the present invention.

In this embodiment, the inlet of the vacuum pump 200 is connected to the inlet pipe 210, the outlet of the vacuum pump 200 is connected to the outlet pipe 220, and the inlet pipe 210 and the outlet pipe 220 respectively pass out of the fixed cover 400 through the opening 440. The vibration damping ring 230 is sleeved on the inlet pipe 210 and the outlet pipe 220, and the middle part of the vibration damping ring 230 is recessed inwards to form a positioning groove 232 clamped at the opening 440, and the bottom of the positioning groove 232 can be abutted against the opening 440 so as to prevent falling off under the vibration of the vibration pump.

In some embodiments, the vibration dampening ring 230 may also be made of a material having an elastic property, such as rubber or silicone, to reduce the vibration of the vacuum pump 200 from being conducted outward through the inlet and

outlet lines

210, 220.

Referring to fig. 7, in some embodiments, a plurality of vibration-damping ribs 312 are formed on the outer circumferential surface of the main body portion 310 at intervals in the axial direction, and the vibration-damping ribs 312 may be abutted against the inner surface of the fixed cover 400 to reduce the vibration transmission of the vacuum pump 200.

That is, when the fixing cover 400 is fastened to the main body 310, the main body 310 and the inner wall of the fixing cover 400 do not form a surface contact, but the plurality of vibration-damping ribs 312 are in line contact with the inner wall of the fixing cover 400, so that the line contact reduces the contact area between the vibration-damping sleeve 300 and the fixing cover 400, which is beneficial to greatly reducing the vibration conduction of the vacuum pump 200.

In some particular embodiments, the ratio of the height of the vibration damping ribs 312 to the wall thickness of the body portion 310 may be configured to be between 1/6 and 1/3, such as 1/6, 1/4, or 1/3, etc.

This ensures that the vibration damping ribs 312, when in contact with the inner wall of the stationary cover 400, serve to reduce the contact area of the vibration damping sleeve 300 with the stationary cover 400 without affecting the fixing strength.

In some embodiments, when the snap-fit portion 112 is formed on the top wall 110 of the mounting chamber, i.e., the damping sleeve 300 and the vacuum pump 200 are fixedly suspended from the top wall 110 of the mounting chamber. Since the body portion 310 may be previously fixed to the top wall 110 of the installation chamber by the connection portion 320, the vibration damping ribs 312 abut against the top wall 110 of the installation chamber when the final fixing is completed, so that the vibration of the vacuum pump 200 can be further suppressed from being transmitted outward through the vibration damping sleeve 300.

Referring to fig. 4, in some embodiments, the air extractor 30 may further include a muffler 600, wherein the muffler 600 is disposed in the mounting chamber, and an inlet of the muffler 600 is connected to an outlet of the vacuum pump 200 to reduce noise generated by the exhaust of the vacuum pump 200.

In this embodiment, the vacuum pump 200 is disposed in the installation chamber, the inlet of the vacuum pump 200 is connected to the air inlet hole 130 on the base 100 through the air inlet pipe 610, the outlet of the vacuum pump 200 is connected to the air outlet pipe 620, and the air outlet pipe 620 is connected to the muffler 600, so as to reduce noise generated by the exhaust of the vacuum pump 200.

Preferably, muffler 600 may also be a resistive muffler. The resistive muffler is a muffler which is used for reducing the sound energy radiated outwards by the muffler to achieve the purpose of silencing by reflecting and interfering sound energy through impedance change caused by abrupt change of the section of a pipeline or by-pass resonant cavity and the like in the sound propagation process, is relatively suitable for eliminating low-medium-frequency noise, has poor silencing effect on high-frequency noise, and is suitable for the use environment of the vacuum pump 200. Of course, those skilled in the art, having the benefit of this disclosure, may also utilize other forms of muffler 600, such as a resistive composite muffler 600, etc., not specifically recited herein.

Further, the housing of the muffler 600 may be configured to be made of a material having a certain elasticity, such as rubber or silica gel, not only solves the problem of resistive muffler damping, but also buffers the fluid in the chamber when the pulsating gas flow reaches the muffler 600, and the noise can be greatly improved.

In the air extractor 30 of the present invention, since the installation chamber is defined in the base 100, the vacuum pump 200 is disposed in the installation chamber, for evacuating the fresh-keeping box 500 disposed on the base 100, the main body portion 310 of the vibration damping sleeve 300 is sleeved outside the vacuum pump 200, the connecting portions 320 are formed on both sides of the main body portion 310, and the fastening portions 112 which are matched with the plurality of connecting portions 320 are formed on both sides of the main body portion 310 on the inner wall of the installation chamber, so as to pre-connect the vibration damping sleeve 300 and the wall surface of the installation chamber, not only effectively reducing the transmission of vibration of the vacuum pump 200 to the base 100, but also facilitating the working procedures of installation and detachment by the staff by the fastening cooperation of the connecting portions 320 and the fastening portions 112.

Further, in the air extractor 30 of the present invention, since the fixing cover 400 is fastened to the main body 310, the fixing cover 400 is connected to the inner wall of the installation chamber by the fastening member, and the damping sleeve 300 is fixed to the wall surface of the installation chamber by the connecting portion 320 and the fastening portion 112 in advance, in order to enable the fixing cover 400 to be tightly connected to the wall surface of the installation chamber, the fixing cover 400 is provided with the notch 430 at the position opposite to the connecting portion 320, and the connecting portion 320 can extend into the notch 430 during the fixing of the vacuum pump 200 by the fixing cover 400, so that the fixing cover 400 cannot be connected to the inner wall of the installation chamber. More importantly, the fixing cover 400 needs to be connected with the inner wall of the installation cavity, and the connecting portion 320 can extend into the notch 430 after fixing, that is, the connecting portion 320 is disposed between the fixing cover 400 and the inner wall of the installation cavity, so that the fixing cover 400 is separated from the inner wall of the installation cavity by the connecting portion 320, rigid collision is avoided, and vibration of the vacuum pump 200 is further slowed down to be transmitted outwards.

Further, in the air extractor 30 of the present invention, a plurality of vibration-damping ribs 312 are formed on the outer circumferential surface of the main body 310 at intervals along the axial direction, and when the fixing cover 400 is fastened to the main body 310 and fixed, the vibration-damping ribs 312 collide with the inner surface of the fixing cover 400 to reduce the vibration transmission of the vacuum pump 200. That is, when the fixing cover 400 is fastened to the main body 310, the main body 310 and the inner wall of the fixing cover 400 do not form a surface contact, but the plurality of vibration-damping ribs 312 are in line contact with the inner wall of the fixing cover 400, so that the line contact reduces the contact area between the vibration-damping sleeve 300 and the fixing cover 400, which is beneficial to greatly reducing the vibration conduction of the vacuum pump 200.

By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. An air extracting device for a refrigerator, comprising:

the base is provided with at least one preservation box, and a mounting cavity is defined in the base;

the vibration damping sleeve comprises a main body part sleeved outside the vacuum pump and a plurality of connecting parts formed on two sides of the main body part, and clamping parts matched with the connecting parts are respectively formed on two sides of the main body part on the inner wall of the installation cavity so as to pre-connect the vibration damping sleeve with the wall surface of the installation cavity;

and the fixed cover is buckled on the main body part and is connected with the inner wall of the mounting cavity through a fastener so as to fix the vacuum pump and the vibration reduction sleeve.

2. The suction device as claimed in claim 1, wherein,

the main body part is cylindrical; and is also provided with

The inside of fixed cover is formed with the appearance looks adaptation of main part holds the chamber, and fixed cover with connecting portion relative position department has seted up and has been used for dodging the breach of connecting portion.

3. The suction device as claimed in claim 2, wherein,

the fixed cover is also provided with an opening which allows the inlet pipeline and the outlet pipeline of the vacuum pump to penetrate out of the fixed cover respectively, the inlet pipeline and the outlet pipeline of the vacuum pump are also respectively sleeved with a vibration damping ring, and the outer sides of the vibration damping rings are in contact with the opening so as to fix the two pipelines on the fixed cover and reduce the outward transmission of vibration of the vacuum pump.

4. The suction device as claimed in claim 2, wherein,

a plurality of vibration-damping ribs are formed on the outer peripheral surface of the main body part at intervals along the axial direction, and are configured to be abutted against the inner surface of the fixed cover by the vibration-damping ribs so as to reduce outward conduction of vibration of the vacuum pump.

5. The suction apparatus as claimed in claim 4, wherein,

the ratio of the height of the vibration-damping ribs to the wall thickness of the main body portion is between 1/6 and 1/3.

6. The suction apparatus as claimed in claim 4, wherein,

the clamping part is formed on the top wall of the mounting cavity; and is also provided with

After the damping sleeve is fixed, the damping ribs are abutted against the top wall of the mounting chamber to reduce the outward conduction of vibration of the vacuum pump.

7. The suction device as set forth in claim 1, further comprising:

and the silencer is arranged in the mounting cavity, and an inlet of the silencer is connected with an outlet of the vacuum pump so as to reduce noise generated by exhaust of the vacuum pump.

8. The suction device as claimed in claim 1, wherein,

the vibration damping sleeve is made of rubber or silica gel materials.

9. A refrigerator, comprising:

a door body; and

the air extraction device according to any one of claims 1 to 8, which is provided inside the door body.