CN115111866A

CN115111866A - Refrigerator and air extractor thereof

Info

Publication number: CN115111866A
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: 2022-09-27
Anticipated expiration: 2041-03-22
Also published as: CN115111866B

Abstract

The invention provides a refrigerator and an air extractor thereof, the air extractor comprises a base, a vacuum pump and a vibration reduction sleeve, wherein at least one preservation 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 preservation box and used for extracting part or all gas in the preservation 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. According to the invention, the vibration damping sleeve is connected with the inner wall of the mounting cavity in advance, so that the transmission of the vibration of the vacuum pump to the base can be effectively slowed down, and the connecting part is in clamping fit with the clamping part, so that the working procedures of mounting, dismounting and the like of workers can be facilitated.

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 promotion of people's standard of living demand that the consumer also is higher and higher to the refrigerator, in order to improve the fresh-keeping performance of refrigerator, the refrigerator that has the evacuation function has appeared among the prior art, has received consumer's favor. The refrigerator is realized by the principle that a certain chamber of the refrigerator is vacuumized by using a vacuum pump, but the vacuum pump usually vibrates greatly when in work, so that the noise of the refrigerator is increased.

In order to solve the above-mentioned drawbacks, a vibration damping treatment for a vacuum pump has been proposed in the prior art, specifically, a vibration damping member is disposed around the vacuum pump, and a housing connected to a refrigerator is disposed outside the vibration damping member. However, this method has a certain disadvantage that although the vibration damping member has a certain vibration damping effect, the casing is made of a rigid material, and thus the vibration of the vacuum pump cannot be effectively reduced after the casing is connected with the refrigerator.

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

Disclosure of Invention

An object of the present invention is to overcome at least one of the drawbacks of the prior art and to provide a refrigerator and an air exhausting apparatus thereof.

A further object of the present invention is to reduce the transmission of the vibration of the damping sleeve of the vacuum pump to the base and facilitate the installation and removal of the vacuum pump and the damping sleeve by workers.

Another further object of the present invention is to separate the stationary cover from the inner wall of the installation chamber by a connection portion, to prevent a rigid collision, and to slow down the transmission of the vibration of the vacuum pump to the outside through the stationary cover.

Still a further object of the present invention is to reduce the contact area of the damping sleeve with the stationary cover, and to slow down the transmission of the vibration of the vacuum pump to the outside through the stationary cover.

In particular, the present invention provides an air extraction device 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 installation cavity, and an inlet of the vacuum pump is connected with the preservation box and used for pumping out part or all of gas in the preservation box; and

the damping cover, it is located the main part in the vacuum pump outside and is formed at a plurality of connecting portion of main part both sides including the cover to the inner wall of installation cavity is formed with respectively in main part both sides with a plurality of connecting portion matched with joint portion, carries out the pre-connection with the wall of damping cover and installation cavity.

Further, the air exhaust 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 body part is cylindrical; and is

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

Furthermore, the fixed cover is provided with openings allowing 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 further respectively sleeved with vibration damping rings, the outer sides of the vibration damping rings are abutted to the openings, and the two pipelines are fixed on the fixed cover and reduce the outward conduction of the vibration of the vacuum pump.

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

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

Further, the clamping part is formed on the top wall of the mounting cavity; and is

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

Further, the air exhaust device further comprises:

the muffler sets up in the installation cavity, and the import of muffler links to each other with the export of vacuum pump to reduce the produced noise of vacuum pump exhaust.

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

In particular, the present invention also provides a refrigerator including: the air extraction device is arranged on the inner side of the door body.

In the air extractor, the base is internally provided with the mounting cavity, 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 damping sleeve is sleeved outside the vacuum pump, the connecting parts are formed on two sides of the main body part, and the inner wall of the mounting cavity is respectively provided with the clamping parts matched with the connecting parts on two sides of the main body part so as to pre-connect the damping sleeve with the wall surface of the mounting cavity.

Furthermore, in the air extractor of the invention, because the fixed cover covers the main body part, the fixed cover is connected with the inner wall of the installation cavity through the fastener, and the vibration damping sleeve is fixed on the wall surface of the installation cavity in advance through the connecting part and the clamping part in a matching way, in order to enable the fixed cover and the wall surface of the installation cavity to be tightly connected, the fixed cover is provided with a notch at the position opposite to the connecting part, and the connecting part can extend into the notch in the process of fixing the vacuum pump by the fixed cover, thereby avoiding that the fixed cover cannot be connected with the inner wall of the installation cavity. More importantly, fixed cover need with the interior wall connection of installation cavity, and connecting portion can stretch into this breach after fixed, that is to say, connecting portion set up between the inner wall of fixed cover and installation cavity, and fixed cover separates through connecting portion with the inner wall of installation cavity like this, has avoided the rigidity collision, has further slowed down the outside transmission of vibration of vacuum pump.

Furthermore, in the air extractor of the present invention, a plurality of vibration reduction ribs are formed on the outer peripheral surface of the main body part at intervals along the axial direction, and when the fixed cover is fastened on the main body part and fixed, the vibration reduction ribs are abutted against the inner surface of the cover body to reduce the outward conduction of the vibration of the vacuum pump. That is, when the fixed cover is buckled on the main body part, the main body part does not form surface contact with the inner wall of the fixed cover, but a plurality of vibration reduction ribs are in line contact with the inner wall of the fixed cover, and the line contact reduces the contact area of the vibration reduction sleeve and the fixed cover, thereby being beneficial to greatly reducing the vibration conduction of the vacuum pump.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

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

FIG. 2 is a schematic view of the installation relationship between a refrigerator door and an air extractor according to an embodiment of the present invention;

FIG. 3 is a schematic view of a suction device in a refrigerator according to one embodiment of the present invention;

FIG. 4 is a bottom view of a suction device in a refrigerator according to one embodiment of the present invention;

FIG. 5 is an exploded view of the evacuation device according to one embodiment of the present invention, concealing the crisper;

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

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

FIG. 8 is a schematic view of a retaining cap in an air extractor device according to one embodiment of the invention;

FIG. 9 is a schematic view of the mounting relationship of the damping sleeve and the retaining cap in an air extractor device according to an embodiment of the invention;

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

Detailed Description

In the description of the present embodiment, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "depth", and the like indicate the orientation or positional relationship based on the orientation in the normal use state of the refrigerator as a reference, and can be determined with reference to the orientation or positional relationship shown in the drawings, for example, "front" indicating the orientation means the side of the refrigerator 1 toward the user. This is merely to facilitate description of the invention and to simplify the description, and is not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated in a particular orientation, and thus should not be taken as limiting the invention.

In the description of the present embodiments, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention provides a refrigerator 1 which generally comprises a refrigerator body 10 and a door body 20.

The housing 10 defines therein at least one, and typically a plurality of, storage compartments, open at the front side, such as a refrigerating compartment, a freezing compartment, a temperature-changing compartment, and the like. The number and function of the specific storage compartments can be configured according to pre-determined requirements.

In some embodiments, the storage temperature of the refrigerating chamber can be 2-9 ℃, or can be 4-7 ℃; the preservation temperature of the freezing chamber can be-22 to-14 ℃, or can 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 requirement to store proper food 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 the front side of the refrigerator body 10 for opening and closing the storage compartments.

For example, the door 20 may be hinged to one side of the front portion of the cabinet 10, and the storage compartments may be opened and closed by pivoting, and the number of the door 20 may be matched with the number of the storage compartments, so that the storage compartments may be individually opened one by one. For example, a refrigerating chamber door body, a freezing chamber door body and a temperature changing chamber door body can be respectively arranged for the refrigerating chamber, the freezing chamber and the temperature changing chamber. In some alternative embodiments, the door 20 may also be in the form of a vertical hinged door, a side-sliding door, a sliding door, or the like.

The storage chamber can be provided with cold energy by a refrigerating system so as to realize the storage environment with refrigeration, freezing and temperature changing. The refrigeration system may be a refrigeration cycle system constituted by 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, the evaporator can be arranged on the outer side or the inner side of the rear wall surface of the inner container of the refrigerator; in the compression type 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 perform circulating refrigeration on the storage compartment.

Since the above-mentioned cabinet 10, door 20 and refrigeration system themselves are well known and easily implemented by those skilled in the art, the detailed description of the cabinet 10, door 20 and refrigeration system itself is omitted herein for the sake of not obscuring and obscuring the inventive points of the present application.

Referring to fig. 2, fig. 2 is a schematic view of 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 extracting devices 30, and the air extracting devices 30 may be disposed at an inner side of any one of the door bodies 20.

The air extractor 30 has a vacuum-pumping function, and can provide a sealed space for precious food materials (such as ginseng, sea cucumber, medlar, tonic medicinal materials, seasonings and the like) stored in the air extractor 30, and perform vacuum-pumping treatment in the sealed space, so that oxidation deterioration is reduced, and the food materials are prevented from tainting with taste. In addition, because air exhaust device 30 sets up the inboard at door body 20, can convenience of customers take at any time, need not to go the box 10 depths again and get and put the edible material.

Referring to fig. 3 to 7, fig. 3 is a schematic diagram 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, in which a fresh food box is hidden, fig. 6 is a bottom view of a base in the air extractor according to an embodiment of the present invention, in which a clamping portion on a top wall of a mounting chamber is shown, and fig. 7 is a schematic diagram of a damping sleeve in the air extractor according to an embodiment of the present invention.

Specifically, the gas-extracting device 30 may include a base 100, a vacuum pump 200, and a damping sleeve 300.

The base 100 is provided with at least one crisper 500, the base 100 defines therein a mounting chamber, the mounting chamber may have a mounting opening opened downward, and the mounting opening is provided with a bottom cover 140 for closing the mounting chamber.

The vacuum pump 200 is arranged in the installation chamber, and an inlet of the vacuum pump 200 is connected with the preservation box 500 and used for pumping out part or all of gas in the preservation box 500.

The damping sleeve 300 may include a main body 310 sleeved outside the vacuum pump 200 and a plurality of connecting portions 320 formed at both sides of the main body 310, and the inner wall of the installation chamber is formed with clamping portions 112 at both sides of the main body 310 respectively, which are matched with the plurality of connecting portions 320, so as 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 recesses 120 for fixing the crispers 500, the crispers 500 can be correspondingly clamped in the recesses 120 one by one, and the bottoms of the recesses 120 are further provided with air inlets 130 communicated with the crispers 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 130 through an air inlet pipe 610, and an outlet of the vacuum pump 200 is connected to an air outlet pipe 620. When the vacuum pump 200 is operated, the air in the preservation box 500 is pumped out, so that a vacuum environment is formed in the preservation box 500, and the requirement of a user on vacuum preservation is met.

Since the vacuum pump 200 has large vibration during operation, which is easy to affect the structure of the refrigerator 1 and generate noise, in order to reduce the outward conduction of the vibration of the vacuum pump 200, the vibration damping sleeve 300 is further sleeved on the outer side of the vacuum pump 200 in this embodiment, 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, the main body 310 of the damping sleeve 300 defines a space for installing the vacuum pump 200 and the motor thereof therein, and an outlet of the vacuum pump 200 may protrude from one end of the main body 310. The plurality of coupling parts 320 may be uniformly disposed at both sides of the body part 310, and each coupling part 320 may include a coupling bar 322 and a jaw 324, the coupling bar 322 may extend outward from the outer circumferential wall of the body part 310, and the jaw 324 may be formed at a free end of the coupling bar 322.

Referring to fig. 6, preferably, the clamping portion 112 may be disposed on the top wall 110 of the mounting chamber, and the top wall 110 of the mounting chamber of the clamping portion 112 is correspondingly disposed at positions on two 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 on the top wall 110 of the mounting chamber.

Since the crisper 500 is disposed on the base 100, the mounting chamber is formed inside the base 100, and thus suspending the vacuum pump 200 at the top wall 110 of the mounting chamber may facilitate the connection of the vacuum pump 200 with the crisper 500.

As mentioned in the background section, the prior art also proposes to perform vibration reduction processing on the vacuum pump 200 by: a damper is provided around the vacuum pump 200, and a housing connected to the refrigerator 1 is provided outside the damper. However, this method has a certain disadvantage that although the vibration damping member has a certain vibration damping effect, the casing is made of a rigid material, and thus the vibration of the vacuum pump cannot be effectively reduced after the casing is connected with the refrigerator.

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 with the inner wall of the installation cavity in advance, that is, fixedly connecting the connecting portion 320 with the clamping portion 112. That is to say, damping sleeve 300 in this embodiment is directly connected with base 100, so not only can slow down the vibration of vacuum pump 200 effectively and transmit to base 100, and connecting portion 320 and joint portion 112 joint cooperation can also make things convenient for the staff to carry out processes such as installation and dismantlement.

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

In some embodiments, the gas-extracting apparatus 30 may further include a fixing cover 400, and the fixing cover 400 is covered on the main body portion 310 and connected with the inner wall of the mounting chamber by a fastener (e.g. a screw, etc.) to fix the vacuum pump 200 and the damping sleeve 300.

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

A plurality of connection rings 410 may be disposed around the fixing cover 400, each connection ring 410 may have a connection hole 420, and a fastening member may pass through the connection hole 420 of the fastening member and then contact the inner wall of the installation cavity. Thus, the fixing cover 400 can serve to further fix the damping sleeve 300 and the vacuum pump 200, and can 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 shape of the main body 310 is formed inside the fixing cover 400, and a notch 430 for avoiding the connecting portion 320 is opened at a position of the fixing cover 400 opposite to the connecting portion 320.

Because the fixing cover 400 is covered and buckled on the main body part 310, the fixing cover 400 is connected with the inner wall of the installation cavity through a fastener, and the damping sleeve 300 is matched and fixed on the wall surface of the installation cavity through the connecting part 320 and the clamping part 112 in advance, therefore, in order to enable the fixing cover 400 to be tightly connected with the wall surface of the installation cavity, the fixing cover 400 is provided with a notch 430 at the position opposite to the connecting part 320, in the process of fixing the vacuum pump 200 by the fixing cover 400, the connecting part 320 can extend into the notch 430, and the fixing cover 400 is prevented from being incapable of being connected with 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 connecting portion 320 may extend into the gap 430 after fixing, that is, the connecting portion 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 connecting portion 320, thereby avoiding rigid collision and further slowing down the outward transmission of the vibration of the vacuum pump 200.

Referring to fig. 5, 8 and 9, further, the fixing cover 400 is further provided with openings 440 allowing the inlet pipe 210 and the outlet pipe 220 of the vacuum pump 200 to respectively penetrate out of the fixing cover 400, and the inlet pipe 210 and the outlet pipe 220 of the vacuum pump 200 are respectively sleeved with damping rings 230, outer sides of the damping rings 230 contact the openings 440, so as to fix the two pipes on the fixing cover 400 and reduce the outward conduction of the vibration of the vacuum pump 200.

Referring to FIGS. 9 and 10, FIG. 10 is a schematic view of a damping ring in an air extractor device according to one embodiment of the 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 through the fixing cover 400 from the opening 440. The damping ring 230 is sleeved on the inlet pipeline 210 and the outlet pipeline 220, the middle part of the 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 to prevent the damping ring from falling off under the vibration of the vibration pump.

In some embodiments, the damping ring 230 may also be made of an elastic material, such as rubber or silicon, to reduce the transmission of the vibration of the vacuum pump 200 to the outside through the inlet pipe 210 and the outlet pipe 220.

Referring to fig. 7, in some embodiments, a plurality of vibration reduction ribs 312 are formed on the outer circumferential surface of the main body 310 at intervals along the axial direction, and the vibration reduction ribs 312 may interfere with the inner surface of the cover body to reduce the outward conduction of the vibration of the vacuum pump 200.

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

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

This ensures that the damping ribs 312 contact the inner wall of the stationary cover 400 without affecting the fixing strength, thereby reducing the contact area between the damping sleeve 300 and the stationary cover 400.

In some embodiments, when the snap-in 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 main body portion 310 may be fixed to the top wall 110 of the mounting chamber through the connecting portion 320 in advance, the vibration reduction ribs 312 abut against the top wall 110 of the mounting chamber after the final fixing is completed, so that the vibration of the vacuum pump 200 can be further suppressed from being conducted to the outside through the vibration damping sleeve 300.

Referring to fig. 4, in some embodiments, the air extracting apparatus 30 may further include a silencer 600, the silencer 600 is disposed in the installation chamber, and an inlet of the silencer 600 is connected to an outlet of the vacuum pump 200 to reduce noise generated by exhausting air from the vacuum pump 200.

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

Muffler 600 may also be preferably a reactive muffler. The reactive muffler is a muffler which reduces the sound energy radiated outwards by the muffler through the reflection and interference of the sound energy caused by the impedance change in the sound transmission process of the abrupt change position or the bypass resonant cavity of the pipeline section, so as to achieve the purpose of muffling, is relatively suitable for eliminating low and medium frequency noise, has poor muffling effect on high frequency noise, and is suitable for the use environment of the vacuum pump 200. Of course, those skilled in the art can also adopt other forms of the silencer 600 after knowing the technical solution of the present invention, such as the impedance hybrid silencer 600, etc., which are not listed here.

Further, the housing of the muffler 600 can be made of a material with certain elasticity, such as rubber or silicon, which not only solves the damping problem of the reactive muffler, but also greatly improves the noise when the fluid is buffered in the chamber after the pulsating gas flow reaches the muffler 600.

In the air extractor 30 of the present invention, since an installation cavity is defined in the base 100, the vacuum pump 200 is disposed in the installation cavity and is used for evacuating the preservation box 500 disposed on the base 100, the main body portion 310 of the damping sleeve 300 is sleeved outside the vacuum pump 200, the connection portions 320 are formed at two sides of the main body portion 310, and the inner wall of the installation cavity is respectively formed with the clamping portions 112 matched with the plurality of connection portions 320 at two sides of the main body portion 310 so as to pre-connect the damping sleeve 300 and the wall surface of the installation cavity, which not only effectively slows down the transmission of the vibration of the vacuum pump 200 to the base 100, but also facilitates the working procedures of installation and disassembly of the connection portions 320 and the clamping portions 112 by clamping and matching.

Further, in the air extractor 30 of the present invention, since the fixing cover 400 is covered and fastened on the main body 310, the fixing cover 400 is connected to the inner wall of the installation chamber by a fastening member, and the damping sleeve 300 is fixed on the wall surface of the installation chamber by the connection 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 a position opposite to the connection portion 320, and in the process of fixing the vacuum pump 200 by the fixing cover 400, the connection portion 320 can extend into the notch 430, so as to avoid 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 chamber, and the connecting portion 320 can extend into the gap 430 after fixing, that is, the connecting portion 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 connecting portion 320, rigid collision is avoided, and further, the vibration of the vacuum pump 200 is slowed down to be transmitted outwards.

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

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

Claims

1. An air extractor for a refrigerator, comprising:

the fresh-keeping box comprises a base, wherein at least one fresh-keeping box is arranged on the base, and an installation cavity is defined in the base;

the 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, clamping parts matched with the connecting parts are formed on two sides of the main body part of the inner wall of the installation cavity respectively, and the damping sleeve is connected with the wall surface of the installation cavity in advance.

2. The gas evacuation device of claim 1, further comprising:

and the fixing 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.

3. The gas evacuation device of claim 2,

the main body part is cylindrical; and is

The fixed cover is internally provided with an accommodating cavity matched with the main body part in shape, and the position of the fixed cover opposite to the connecting part is provided with a notch used for avoiding the connecting part.

4. The gas evacuation device of claim 3,

the fixed cover is further provided with openings allowing 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 further sleeved with vibration damping rings respectively, the outer sides of the vibration damping rings are abutted to the openings, so that the two pipelines are fixed on the fixed cover, and vibration of the vacuum pump is reduced and conducted outwards.

5. The gas evacuation device of claim 3,

and a plurality of vibration reduction 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 cover body by utilizing the vibration reduction ribs so as to reduce the outward conduction of the vibration of the vacuum pump.

6. The gas evacuation device of claim 5,

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

7. The gas evacuation device of claim 5,

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

After the damping sleeve is fixed, the damping ribs abut against the top wall of the mounting cavity so as to reduce the outward conduction of the vibration of the vacuum pump.

8. The suction device of claim 1, further comprising:

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.

9. The gas evacuation device of claim 1,

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

10. A refrigerator, characterized by comprising:

a door body; and

the air extractor according to any one of claims 1 to 9, wherein the air extractor is disposed inside the door body.