CN115111867B

CN115111867B - Refrigerator and air extractor thereof

Info

Publication number: CN115111867B
Application number: CN202110303035.2A
Authority: CN
Inventors: 赵弇锋; 万彦斌; 王文椿; 刘宏晖; 陈建全
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: CN115111867A

Abstract

The invention provides a refrigerator and an air extracting device thereof. The base is provided with at least one preservation box, an installation cavity is defined in the base, the vacuum pump is arranged in the installation cavity, the inlet of the vacuum pump is connected with the preservation box, the vibration damping sleeve comprises a main body part sleeved outside the vacuum pump, a plurality of first vibration damping ribs are formed on the outer peripheral surface of the main body part at intervals, the fixing piece is arranged on the periphery of the main body part, a plurality of second vibration damping ribs different from the first vibration damping ribs in extending direction are formed on the inner surface of the fixing piece at intervals, and the vibration of the vacuum pump is reduced to be conducted outwards through the first vibration damping ribs and the second vibration damping ribs in a cross contact mode. The main body part of the vibration damping sleeve is not in integral contact with the fixing piece, but the first vibration damping rib is in contact with the second vibration damping rib, and the point contact mode can reduce the contact area between the fixing piece and the vibration damping sleeve, so that the vibration of the vacuum pump is greatly reduced.

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 of a vacuum pump has also been developed in the prior art, specifically by providing vibration damping members around the vacuum pump. However, this method has a disadvantage in that the vibration reducing effect of the vibration reducing member is limited and the vibration of the vacuum pump cannot be effectively reduced.

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 invention is to reduce vibration of the vacuum pump.

It is yet a further object of the present invention to absorb the vibration of the vacuum pump to dampen the vibration generated by the vacuum pump and transmitted to the base.

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;

the vibration damping sleeve comprises a main body part sleeved outside the vacuum pump, and a plurality of first vibration damping ribs are formed on the outer peripheral surface of the main body part at intervals; and

and the fixing piece is arranged around the main body part and used for fixing the vacuum pump in the mounting cavity, a plurality of second vibration reduction ribs which are different from the extending direction of the first vibration reduction ribs are formed on the inner surface of the fixing piece at intervals, and the vibration of the vacuum pump is reduced to be conducted outwards through the cross contact of the first vibration reduction ribs and the second vibration reduction ribs.

Further, the main body part is cylindrical, and the plurality of first vibration reduction ribs extend along the axial direction of the main body part respectively;

the plurality of second vibration reduction ribs are respectively arranged along the circumferential direction of the main body part, and the profile formed by the protruding end parts of the plurality of second vibration reduction ribs is matched with the appearance of the main body part.

Further, the main body portion is provided at a top wall of the mounting chamber; and is also provided with

The fixing member further includes a first fixing member provided at a side of the main body portion facing away from the top wall of the installation chamber, and the first fixing member directly or indirectly fixes the vacuum pump to the top wall of the installation chamber through a fastener.

Further, the damping sleeve further includes:

the supporting part is connected with the outer peripheral surface of the main body part and is positioned between the top wall of the mounting cavity and the main body part, and the supporting part is flat and is abutted against the top wall of the mounting cavity; and is also provided with

A plurality of vibration reduction gaps are arranged between the main body part and the supporting part at intervals so as to reduce vibration generated by the vacuum pump and transmitted to the base.

Further, the fixing member further includes:

the second fixing piece is arranged between the top wall of the installation cavity and the main body part, the outer surface of the second fixing piece is propped against the top wall of the installation cavity, and the first fixing piece and the second fixing piece clamp and fix the vacuum pump on the top wall of the installation cavity through the fastening piece.

Further, the fixing piece is provided with a stop part along the two axial ends of the main body part respectively so as to restrict the vibration damping sleeve to move along the axial direction.

Further, the two axial ends of the main body part are respectively provided with a limiting part so as to limit the axial movement of the vacuum pump along the vibration reduction sleeve.

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 invention also provides a refrigerator which comprises a door body and any air extractor, wherein the air extractor 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 outer peripheral surface of the main body part is provided with a plurality of first damping ribs at intervals, the fixing piece is arranged around the main body part, and the inner surface of the fixing piece is provided with a plurality of second damping ribs which are different from the extending direction of the first damping ribs at intervals. Thus, the first vibration damping rib and the second vibration damping rib form a point contact when the fixing member fixes the vacuum pump. That is, the main body of the vibration damping sleeve is not in contact with the fixing member as a whole, but the first vibration damping rib and the second vibration damping rib are in contact, and the contact area between the fixing member and the vibration damping sleeve can be reduced in a point contact manner, so that the vibration conduction of the vacuum pump can be greatly reduced.

Further, in the air extractor of the present invention, since the main body is disposed at the top wall of the installation chamber, the first fixing member is disposed at a side of the main body facing away from the top wall of the installation chamber, the supporting portion is disposed between the top wall of the installation chamber and the main body, and the fastening member can pass through the first connecting hole of the first fixing member and the second connecting hole on the supporting portion to be connected with the top wall of the installation chamber, so as to indirectly fix the vacuum pump at the top wall of the installation chamber. And a plurality of vibration reduction gaps are arranged between the main body part and the supporting part at intervals to form a base similar to an air spring, so that the vibration of the vacuum pump is further absorbed, and the vibration generated by the vacuum pump and transmitted to the base is relieved.

Further, in the air extractor disclosed by the invention, the first fixing piece is arranged on one side of the main body part, which is far away from the top wall of the installation cavity, the second fixing piece is arranged between the top wall of the installation cavity and the main body part, the outer surface of the second fixing piece is propped against the top wall of the installation cavity, namely the inner surface of the first fixing piece is opposite to the inner surface of the second fixing piece, the first fixing piece and the second fixing piece clamp the vacuum pump and the vibration reduction sleeve, the vacuum pump and the vibration reduction sleeve can be fixedly hung on the top wall of the installation cavity by using the fastening piece, and the connection of the vacuum pump and the fresh-keeping box is facilitated on the basis of vibration reduction.

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, with a bottom cover hidden, according to one embodiment of the present invention;

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

FIG. 6 is a schematic view showing the mounting relationship of the damping sleeve and the first fixing member in the air extractor according to the first embodiment of the present 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 an exploded view of an air extractor according to a second embodiment of the present invention, with the fresh box hidden;

FIG. 9 is an exploded view of an air extractor according to a third embodiment of the present invention, with the fresh box hidden;

FIG. 10 is a schematic view of a damping sleeve in an air extractor according to a third 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 1 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 refers to 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.

The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include at least one such feature, i.e. one or more such features. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. When a feature "comprises or includes" a feature or some of its coverage, this indicates that other features are not excluded and may further include other features, unless expressly stated otherwise.

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, and in some embodiments, the storage temperature of the refrigerated 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 hinged to one side of the front of the case 10, and the storage compartments may be opened and closed in a pivoting 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 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, the evaporator can be arranged outside or inside the rear wall surface of the 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, where the air extraction devices 30 are disposed at the inner side of any one of the doors 20, and have a vacuumizing function, so that a sealed space can be provided for precious food materials (such as ginseng, sea cucumber, medlar, tonic materials, seasonings, etc.) stored in the air extraction devices 30, and vacuumizing treatment is performed in the sealed space, so that oxidative deterioration is reduced, and flavor of the food materials is prevented. And 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 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, with a bottom cover hidden, according to one embodiment of the present invention; fig. 5 is an exploded view of the air extractor 30 according to the first embodiment of the present invention, concealing the fresh food compartment; FIG. 6 is a schematic illustration of the mounting relationship of a damping sleeve to a first fixture in an air extractor according to one embodiment of the present invention; FIG. 7 is a schematic view of a damping sleeve in an air extractor according to one embodiment of the present invention.

Specifically, the air extractor 30 may include a base 100, a vacuum pump 200, a damping sleeve 300, and a fixture 400.

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 includes a body portion 310 fitted over the outside of the vacuum pump 200, and a plurality of first damping ribs 312 are formed at intervals on the outer circumferential surface of the body portion 310.

The fixing member 400 is disposed around the body portion 310 for fixing the vacuum pump 200 to the installation chamber, and a plurality of second vibration-damping ribs 402, which are different from the extending direction of the first vibration-damping ribs 312, are formed at intervals on the inner surface of the fixing member 400, and vibration of the vacuum pump 200 is reduced from being externally conducted by the first vibration-damping ribs 312 being in cross-contact with the second vibration-damping ribs 402.

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, an outlet of the vacuum pump 200 is connected to the air outlet pipe 620, and when the vacuum pump 200 operates, air in the fresh-keeping box 500 is pumped out, so that a vacuum environment is formed in the fresh-keeping box 500, and a user's demand for vacuum fresh-keeping is satisfied.

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. The fixing member 400 is disposed around the main body 310, and is used for fixing the vacuum pump 200 to the mounting chamber, that is, when the fixing member 400 fixes the vacuum pump 200, the damping sleeve 300 is located between the vacuum pump 200 and the fixing member 400, so that the damping sleeve 300 can absorb part of the vibration of the vacuum pump 200 and can slow down the transmission of the vibration generated by the vacuum pump 200.

As mentioned in the background section, damping of vacuum pumps has been developed in the prior art, which utilizes the provision of damping members around the vacuum pump. However, this method has a certain disadvantage in that the vibration damping effect of the vibration damping member is limited and the vibration conduction of the vacuum pump cannot be effectively reduced.

Referring to fig. 5 to 7, in order to more effectively suppress the outward transmission of vibration of the vacuum pump 200, a plurality of first vibration-damping ribs 312 are formed at intervals on the outer circumferential surface of the main body portion 310 of the vibration-damping sleeve 300 of the present embodiment, a plurality of second vibration-damping ribs 402, which are different from the extending direction of the first vibration-damping ribs 312, are formed at intervals on the inner surface of the fixing member 400, and when the fixing member 400 fixes the vacuum pump 200, the first vibration-damping ribs 312 and the second vibration-damping ribs 402 form point contacts. That is, when the fixture 400 fixes the vacuum pump 200, the main body portion 310 of the damper sleeve 300 is not in surface contact with the fixture 400, but the first damper rib 312 and the second damper rib 402 are in point contact. Compared with the prior art, the point contact mode can reduce the contact area between the fixing piece 400 and the vibration damping sleeve 300, which is beneficial to greatly reducing the vibration conduction of the vacuum pump 200.

Referring to fig. 5 to 7, in some embodiments, the body portion 310 of the damping sleeve 300 has a cylindrical shape, the inside of which defines a space for mounting the vacuum pump 200 and the motor thereof, and an outlet of the vacuum pump 200 may protrude from one end of the body portion 310. The plurality of first vibration damping ribs 312 may extend axially along the main body portion 310, the plurality of second vibration damping ribs 402 may be disposed in a circumferential direction of the main body portion 310, respectively, and the protruding end portions of the plurality of second vibration damping ribs 402 may form a profile that matches the outer shape of the main body portion 310. When the fixing member 400 fixes the vacuum pump 200, the second vibration-damping rib 402 and the second vibration-damping rib 402 may be vertically in cross contact, and since the second vibration-damping rib 402 is disposed along the circumferential direction of the main body portion 310 and the profile of the protruding end portion thereof is adapted to the profile of the main body portion 310, the second vibration-damping rib 402 may also function to restrict the movement of the vacuum pump 200 in the radial direction.

Referring to fig. 4-7, in some embodiments, the body portion 310 is disposed at the top wall 110 of the mounting chamber. The fixing member 400 may further include a first fixing member 410, the first fixing member 410 being disposed at a side of the body portion 310 facing away from the top wall 110 of the mounting chamber, and the first fixing member 410 directly or indirectly fixing the vacuum pump 200 to the top wall 110 of the mounting chamber by means of a fastener (not shown). That is, the first fixing member 410 of the present embodiment can achieve a fixed suspension of the vacuum pump 200 at 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.

Referring to fig. 6, in the present embodiment, the first fixing element 410 is disposed on a side of the main body 310 facing away from the top wall 110 of the installation cavity, and may have a plurality of first connecting portions 412 at two ends, and the first connecting portions 412 are formed with first connecting holes 414, so that the first fixing element may be directly connected to the top wall 110 of the installation cavity through the first connecting holes 414 by using fasteners.

Referring to fig. 8, fig. 8 is an exploded view of an air extractor according to a second embodiment of the present invention, which conceals a fresh box. In still other embodiments, the fixing member 400 may further include a second fixing member 420, the second fixing member 420 may be identical to the first fixing member 410, the second fixing member 420 may be disposed between the mounting chamber top wall 110 and the body portion 310, and an outer surface thereof may abut against the mounting chamber top wall 110, such that an inner surface of the first fixing member 410 is opposite to an inner surface of the second fixing member 420 to sandwich the vacuum pump 200 and the damping sleeve 300 between the first fixing member 410 and the second fixing member 420, and a fastener may be coupled with the mounting chamber top wall 110 through first coupling holes 414 on the first fixing member 410 and the second fixing member 420 to achieve indirect fixing of the vacuum pump 200 to the mounting chamber top wall 110.

Referring to fig. 9 and 10, fig. 9 is an exploded view of an air extractor according to a third embodiment of the present invention, which conceals a fresh box; FIG. 10 is a schematic view of a damping sleeve in an air extractor according to a third embodiment of the present invention.

The present invention also provides another solution in which the first fixing member 410 indirectly fixes the vacuum pump 200 to the top wall 110 of the installation chamber. Specifically, the damping sleeve 300 may further include a supporting portion 320, where the supporting portion 320 is connected to the outer peripheral surface of the main body portion 310, and the supporting portion 320 is located between the top wall 110 of the installation chamber and the main body portion 310, is in a flat plate shape, and abuts against the top wall 110 of the installation chamber. The two sides of the supporting part 320 may further be provided with a second connection part 322 opposite to the first connection part 412, the second connection part 322 is provided with a second connection hole 324, and a fastener may be connected with the top wall 110 of the installation chamber through the first connection hole 414 of the first fixing member 410 and the second connection hole 324 of the supporting part 320, so as to indirectly fix the vacuum pump 200 to the top wall 110 of the installation chamber.

In the present embodiment, a plurality of vibration damping gaps 330 are further provided between the main body portion 310 and the support portion 320 at intervals to dampen the vibration generated by the vacuum pump 200 and transmitted to the base 100.

Specifically, the main body 310 is disposed opposite to the support 320 with a certain gap therebetween, two opposite ends of the main body 310 to the support 320 may be connected by a support column 340, and a plurality of partition columns 350 may be disposed between the two support columns 340 at intervals to partition the gap between the main body 310 and the support 320 into a plurality of vibration damping gaps 330.

Since the support part 320 is flat and abuts against the top wall 110 of the installation chamber, when the first fixing member 410 fixes the vacuum pump 200 to the top wall 110 of the installation chamber, the support part 320 may form an air spring-like base using the vibration reduction gap 330, further absorbing the vibration of the vacuum pump 200.

Referring to fig. 6, in some embodiments, the fixing member 400 is provided with stop portions 430 at both ends in the axial direction of the main body portion 310, respectively, to restrict the vibration damping sleeve 300 from moving in the axial direction.

When the fixing member 400 includes only the first fixing member 410, the stopper portions 430 may be disposed at both ends of the first fixing member 410. As shown in fig. 5, the stop portions 430 and the second vibration-damping rib 402 may be disposed in parallel, and may have an arc shape, and an inner ring of the stop portions may be slightly higher than the second vibration-damping rib 402, and a distance between the two stop portions 430 may be configured to be equal to an axial length of the main body portion 310, and when the first fixing member 410 fixes the vacuum pump 200, the two stop portions 430 may clamp the vibration-damping sleeve 300 in an axial direction of the main body portion 310, so as to prevent the vibration of the vibration-damping sleeve 300 in the axial direction of the vacuum pump 200.

Similarly, when the fixing member 400 includes the first fixing member 410 and the second fixing member 420, the two ends of the first fixing member 410 and the second fixing member 420 can be respectively provided with the stop portions 430, so that the restraining effect is better and will not be repeated.

Referring to fig. 7 and 10, in some embodiments, two axial ends of the main body 310 are respectively provided with a limiting portion 314 to limit the axial movement of the vacuum pump 200 along the damping sleeve 300. An opening 316 may also be provided in the stop 314 opposite the outlet or inlet end of the vacuum pump 200 to facilitate passage of the outlet or inlet of the vacuum pump 200 through the opening 316.

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, 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 vibration reduction, but also provides a damping of the fluid in the chamber of the muffler 600 when the pulsating gas flow reaches the muffler, 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 damping sleeve 300 is sleeved outside the vacuum pump 200, the plurality of first damping ribs 312 are formed on the outer circumferential surface of the main body portion 310 at intervals, the fixing member 400 is disposed around the main body portion 310, and the plurality of second damping ribs 402 different from the extending direction of the first damping ribs 312 are formed on the inner surface of the fixing member 400 at intervals. Accordingly, when the fixing member 400 fixes the vacuum pump 200, the first vibration damping rib 312 and the second vibration damping rib 402 form point contact. That is, the main body 310 of the damper sleeve 300 is not in contact with the mount 400 as a whole, but the first damper rib 312 and the second damper rib 402 are in contact, and the point contact method can reduce the contact area between the mount 400 and the damper sleeve 300, which is advantageous in greatly reducing the vibration of the vacuum pump 200.

Further, in the air extractor 30 of the present invention, since the main body 310 is disposed at the top wall 110 of the installation cavity, the first fixing member 410 is disposed at a side of the main body 310 facing away from the top wall 110 of the installation cavity, the supporting portion 320 is disposed between the top wall 110 of the installation cavity and the main body 310, and the fastening member can be connected to the top wall 110 of the installation cavity through the first connecting hole 414 of the first fixing member 410 and the second connecting hole 324 of the supporting portion 320, so as to indirectly fix the vacuum pump 200 to the top wall 110 of the installation cavity. And a plurality of vibration reduction gaps 330 are arranged between the main body part 310 and the supporting part 320 at intervals to form a base similar to an air spring, and further absorb the vibration of the vacuum pump 200 so as to reduce the vibration generated by the vacuum pump 200 and transmitted to the base 100.

Further, in the air extractor 30 of the present invention, the first fixing member 410 is disposed at one side of the main body 310 away from the top wall 110 of the installation cavity, the second fixing member 420 is disposed between the top wall 110 of the installation cavity and the main body 310, the outer surface of the second fixing member 420 abuts against the top wall 110 of the installation cavity, that is, the inner surface of the first fixing member 410 is opposite to the inner surface of the second fixing member 420, the first fixing member 410 and the second fixing member 420 clamp the vacuum pump 200 and the damping sleeve 300, and the vacuum pump 200 and the damping sleeve 300 can be fixedly suspended on the top wall 110 of the installation cavity by using fasteners, so that the vacuum pump 200 is closer to the fresh-keeping box 500 on the basis of damping, and the vacuum pump 200 is convenient to connect with the fresh-keeping box 500.

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;

and the fixing piece is arranged around the main body part and used for fixing the vacuum pump in the mounting cavity, a plurality of second vibration reduction ribs which are different from the first vibration reduction ribs in extending direction are formed on the inner surface of the fixing piece at intervals, and the vibration of the vacuum pump is reduced to be conducted outwards through the cross contact of the first vibration reduction ribs and the second vibration reduction ribs.

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

the main body part is cylindrical, and a plurality of first vibration reduction ribs extend along the axial direction of the main body part respectively;

the plurality of second vibration reduction ribs are respectively arranged along the circumferential direction of the main body part, and the outline formed by the protruding end parts of the plurality of second vibration reduction ribs is matched with the outline of the main body part.

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

the main body part is arranged at the top wall of the mounting cavity; and is also provided with

The fixing piece further comprises a first fixing piece which is arranged on one side, away from the top wall of the installation cavity, of the main body portion, and the first fixing piece is used for directly or indirectly fixing the vacuum pump to the top wall of the installation cavity through a fastening piece.

4. An air extractor according to claim 3, wherein the damping sleeve further comprises:

a support part connected with the outer peripheral surface of the main body part and positioned between the top wall of the mounting cavity and the main body part, wherein the support part is flat and is abutted against the top wall of the mounting cavity; and is also provided with

5. An air extractor according to claim 3, wherein the fixing means further comprises:

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

and the two ends of the fixing piece along the axial direction of the main body part are respectively provided with a stop part so as to restrict the vibration damping sleeve to move along the axial direction.

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

and two axial ends of the main body part are respectively provided with a limiting part so as to limit the axial movement of the vacuum pump along the vibration reduction sleeve.

8. 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.

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

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

10. A refrigerator, comprising:

a door body; and

the air extraction device according to any one of claims 1 to 9, which is provided inside the door body.