CN111765690A

CN111765690A - Refrigerator with a door

Info

Publication number: CN111765690A
Application number: CN202010619910.3A
Authority: CN
Inventors: 杨春; 赵振雷; 刘铁伟
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2020-10-13

Abstract

The invention provides a refrigerator, which comprises a refrigerator body, a refrigerator door, a door hinge assembly and a low-pressure storage unit, wherein the door hinge assembly and the low-pressure storage unit are arranged at the top of the refrigerator body; the silencing unit includes: the resonant cavities are distributed at intervals, and the connecting cavities are communicated with two adjacent resonant cavities and are arranged at intervals with the resonant cavities; wherein the cross-sectional area of the connecting cavity is smaller than the cross-sectional area of the resonant cavity; the vacuum pump is arranged on the box door, and the silencing unit is arranged in the hinge box at the top of the box body, so that the current space is fully utilized, the transmission of vibration to the box body can be effectively avoided, the noise is reduced, the overall performance of the refrigerator is optimized, and the user experience is improved.

Description

Refrigerator with a door

Technical Field

The invention belongs to the technical field of refrigerators, and particularly relates to a refrigerator.

Background

Refrigerators occupy an important share of the market as indispensable electric appliances in home life. With the increasing requirements of consumers on the quality of fresh food, the requirements on refrigerators are also increasing, and refrigerators are required to have higher configuration and stronger functions, and especially, it is desirable that the stored fresh food can have a longer storage period, so that the freshness of food materials is ensured, and the loss of nutritional ingredients is prevented.

In order to better store the food, it has been developed to provide a vacuum chamber in the refrigerator, and the vacuum chamber is vacuumized by a vacuuming device. The main function of the vacuum is to remove oxygen from the vacuum chamber to prevent food from deteriorating. When the vacuumizing device works, vibration noise is generated and is directly transmitted to the refrigerator body, the overall performance of the refrigerator is affected, and the user experience is reduced.

The invention is provided in view of the above.

Disclosure of Invention

The invention provides a refrigerator aiming at the technical problems.

In order to achieve the purpose, the invention adopts the technical scheme that:

a refrigerator, comprising:

a cabinet defining an insulated low temperature storage compartment;

the door hinge assembly is arranged at the top of the box body and comprises a door hinge plate and a door hinge box covered outside the door hinge plate;

a door rotatably coupled to the door hinge to open or close the low-temperature storage compartment;

a low-pressure storage unit, wherein air can be pumped to form air pressure lower than the external atmospheric pressure of the refrigerator so as to keep food fresh;

the vacuum pump is arranged at the top of the box door; the low-pressure storage unit is provided with an exhaust pipe and an exhaust pipe communicated with the low-pressure storage unit;

the silencing unit is arranged on the door hinge box; one end of the air inlet pipe is communicated with the exhaust pipe, and the other end of the air inlet pipe is communicated with the atmosphere outside the box body; the noise reduction unit includes:

the resonant cavities are distributed at intervals;

the connecting cavity is communicated with two adjacent resonant cavities and is arranged at intervals with the resonant cavities;

wherein the cross-sectional area of the connecting cavity is smaller than the cross-sectional area of the resonant cavity.

Preferably, the silencing unit comprises a first silencing piece and a second silencing piece;

the first silencing piece comprises a plurality of first resonance subsections and first connection subsections which are arranged at intervals, wherein the first resonance subsections are surrounded by first resonance sub-cavities with one open ends, and the first connection subsections are surrounded by first connection sub-cavities with one open ends;

the second silencing part comprises a plurality of second resonance subsections and second connecting subsections which are arranged at intervals, wherein the second resonance subsections surround a second resonance sub-cavity with one open end, and the second connecting subsections surround a second connecting sub-cavity with one open end;

the open end of the first resonance subsection is butted with the open end of the second resonance subsection corresponding to the first resonance subsection, and the open end of the second connection subsection is butted with the open end of the second connection subsection corresponding to the first connection subsection, so that a plurality of resonance cavities and connection cavities which are arranged at intervals are defined.

Preferably, the first silencing piece and the second silencing piece are formed by ultrasonic welding.

Preferably, the first resonance part of the first silencing piece is provided with a second clamping hole close to the edge of the opening end of the first resonance part; a third clamping block is arranged at the edge of the second resonance subsection of the second silencing piece close to the opening end of the second resonance subsection; when the first resonance part and the second resonance part are in butt joint, the second clamping hole is matched with the third clamping block, and the first silencing piece and the second silencing piece are connected into a whole.

Preferably, the second sound deadening member is formed with a ring plate near an open end thereof; the opening end of the first silencing piece is close to the inner edge part of the first silencing subchamber and is sunken into the first silencing subchamber to form a mounting table; the mounting table on the first silencing piece is matched with the annular plate of the second silencing piece, so that the cavity wall at the opening end of the first silencing piece is sleeved on the periphery of the mounting table of the second silencing piece.

Preferably, a receiving portion for mounting the silencing unit is arranged on the box bottom of the door hinge box.

Preferably, a sound absorbing layer is provided between the sound deadening unit and the housing portion.

Preferably, the two end parts of the silencing unit are respectively provided with a first connecting pipe and a first connecting through hole which are communicated with the resonant cavity; the first connecting pipe is communicated with the exhaust pipe through a second pipeline; and the door hinge box is provided with a second communication hole communicated with the atmospheric environment outside the box body, and the second communication hole is communicated with the first communication hole.

Preferably, a first connecting piece is arranged on the door hinge plate; the box door is provided with a second connecting piece which is rotationally connected with the first connecting piece; wherein the box door rotates around the rotating shaft of the second connecting piece; at least one of the first connecting piece and the second connecting piece is provided with a pipeline channel;

the second pipeline passes through the pipeline channel; the second pipeline is communicated with the first connecting pipe through a hose or a rotary joint;

when the vacuum pump works, air in the low-pressure storage unit sequentially passes through the air suction pipe, the vacuum pump, the exhaust pipe and the silencing unit, and is finally discharged out of the box body through the silencing unit.

Preferably, a foaming layer is arranged in the box door, and the second pipeline is arranged in the foaming layer.

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

Drawings

FIG. 1 is a schematic structural view illustrating a door of a refrigerator according to the present invention in an opened state;

FIG. 2 is a schematic diagram illustrating a relative arrangement of a door and a vacuum pump assembly of the refrigerator according to the present invention;

FIG. 3 is an exploded view of a door hinge assembly of the refrigerator according to the present invention;

FIG. 4 is a schematic piping diagram illustrating the vacuum pump assembly of the refrigerator according to the present invention;

FIG. 5 is a schematic diagram illustrating the relative positions of the vacuum pump assembly and the door receiving portion of the refrigerator according to the present invention;

FIG. 6 is a schematic structural view of a top of a door of a refrigerator according to the present invention;

FIG. 7 is an exploded view of the top of the door of the refrigerator according to the present invention;

FIG. 8 is an exploded view of the top of the door of the refrigerator according to another aspect of the present invention;

FIG. 9 is an exploded view of the top of the door of the refrigerator according to another aspect of the present invention;

FIG. 10 is a schematic view of a shielding cover at the top of the door of the refrigerator according to the present invention;

FIG. 11 is a first schematic view illustrating a partial structure of a top of a door of a refrigerator according to the present invention;

FIG. 12 is a second schematic view of a top portion of a refrigerator door according to the present invention;

FIG. 13 is a third schematic view of a top portion of a door of a refrigerator according to the present invention;

FIG. 14 is a plan view of a top of a door of the refrigerator according to the present invention;

FIG. 15 is a cross-sectional view taken along line A-A of FIG. 14;

FIG. 16 is a cross-sectional view taken in the direction B-B of FIG. 14;

FIG. 17 is a schematic view of the door hinge assembly, the silencing unit and the top of the refrigerator door of the present invention;

FIG. 18 is an exploded view of the door hinge assembly and the silencing unit of the refrigerator of the present invention;

FIG. 19 is another exploded view of the door hinge assembly and the silencing unit of the refrigerator of the present invention;

fig. 20 is a schematic view showing an overall structure of a muffler of a refrigerator according to the present invention;

FIG. 21 is an exploded view of the muffler shown in FIG. 20;

FIG. 22 is an exploded view of the muffler of FIG. 20 from another perspective;

FIG. 23 is another schematic view showing the whole structure of a muffler for a refrigerator according to the present invention;

FIG. 24 is an exploded view of the muffler shown in FIG. 23;

FIG. 25 is an exploded view from another perspective of the muffler shown in FIG. 23.

In the above figures:

a refrigerator 1; a box body 2; a housing 2 a; an inner container 2 b; a door 13; a top plate 14; the sleeve 15 is rotated; a refrigerating chamber 10; a door hinge assembly 6; a door hinge plate 7; a fixed seat plate 71; a connection seat plate 72; a connecting sleeve 73; a fastening position 74; the first connection hole group 75; a door hinge box 8; a box bottom 81; a box side plate 82; a first hook 83; a second set of connecting holes 84; a vacuum pump 3; an exhaust tube 38; an exhaust pipe 39; a first conduit 16; a second pipe 17; a rubber sleeve 9; the perforations 13 a; a main body portion 91; a mounting cavity 92; a projection 93; the accommodating portion 18; a recess 19; the second latch 41; a stopper 42; a mounting gap 43; a snap 44; a first joint 45; a first latch 46; a first shroud 47; a first end cap 48; a shielding cover 30; a convex plate 31; a second hook 32; a housing 33; a first card hole 34; a second shroud 35; a second end cap 36; a second joint 37; the guide post 37 a; a baffle 37 b; a concave ring 37 c; a receptacle 51; the sound absorbing layer 52; a muffler unit 24; the first silencing piece 25; a first resonance section 253; a first connection section 254; a first resonance sub-chamber 253 a; first connection subchamber 254 a; the first connecting pipe 251; a first communication hole 252; a second noise reducing member 26; a second resonance subsection 261; a second connecting section 262; a second resonant subchamber 261 a; a second connecting subchamber 262 a; a second card hole 253 b; a third block 261 b; a mounting table 253 c; a ring plate 261 c; the second communication hole 85.

Detailed Description

The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the scope of the present invention as claimed is not limited to the scope described in the specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1-16, a refrigerator 1, the refrigerator 1 includes a heat-insulating box 2, the box 2 includes a casing 2a, an inner container 2b and a heat-insulating layer (not shown) therebetween. The cabinet 2 defines a plurality of insulated low-temperature storage compartments to store food and the like. In the present embodiment, these low-temperature storage compartments are a refrigerating compartment 10 located at the upper portion and a freezing compartment located at the bottom portion, respectively. The low-temperature storage compartments may be closed by respective corresponding door 13. The refrigerating chamber 10 is provided with a side-by-side door 13, and the freezing chamber is also provided with a side-by-side door.

The refrigerator 1 has an evaporative refrigeration system forming a closed loop. The refrigeration system includes at least a compressor (not shown), a condenser (not shown), a throttle device (not shown), and an evaporator (not shown). Since such a refrigeration system is well known in the art, further description thereof is omitted. Of course, other types of refrigeration systems (e.g., absorption refrigeration systems, thermoelectric refrigeration systems) may be used with the refrigerator 1.

The refrigerator 1 is provided with a low pressure storage unit that can be maintained in a low pressure state and a vacuum pump assembly for pumping gas from the low pressure storage unit. In the present embodiment, the low pressure storage unit is provided inside the refrigerating compartment 10. In this embodiment, the vacuum pump assembly is disposed on the top of the door 13 of the refrigerating chamber 10 in which the low pressure storage unit is located. It should be understood that in other embodiments, the low pressure storage unit may be disposed within other low temperature storage compartments, such as a temperature change compartment having a temperature range that is switchable between a refrigerated temperature zone and a refrigerated temperature zone. The vacuum pump assembly is located on top of the door 13 of the cryogenic storage compartment in which the low pressure storage unit is located.

When the low pressure storage unit is turned off and the vacuum pump assembly is turned on, gas located in the low pressure storage chamber is evacuated and the low pressure storage chamber is in a low pressure state. According to a preferred embodiment of the present invention, at the end of the evacuation process, the pressure within the low pressure storage chamber is between one standard atmosphere and absolute vacuum. Since the pressure in the low-pressure storage chamber is lower than the standard atmospheric pressure, the person skilled in the art is also commonly referred to as "vacuum storage" and this state in which the pressure is lower than the standard atmospheric pressure is referred to as "vacuum state".

It should be noted that, the low-pressure storage unit in the present invention may be configured in the form of a drawer, may also be configured in the form of a box (fixed or detachable form, and is connected to a vacuum pump for vacuum pumping when vacuum pumping is required), may also be configured in the form of a plastic packaging bag (sealed after vacuum pumping), and the specific form thereof is determined according to a specific scheme.

As shown in fig. 1-3, a door hinge assembly 6 is arranged on a top plate 14 of the box body 2, and the door hinge assembly 6 comprises a door hinge plate 7 and a door hinge box 8; a first connecting piece is arranged on the door hinge plate 7, and a second connecting piece which is rotationally connected with the first connecting piece is arranged on the door 13; and at least one of the first connecting piece and the second connecting piece is provided with a pipeline channel. In this embodiment, the first connecting member includes a connecting sleeve 73, and the second connecting member includes a rotating sleeve 15 sleeved inside or outside the connecting sleeve 73; the inner bore of the rotating sleeve 15 or the connecting sleeve 73 located in the inner ring forms a line channel.

Specifically, the door hinge plate 7 includes a fixing seat plate 71 and a connecting seat plate 72. The fixed seat plate 71 is attached to the outer surface of the top plate 14 of the box body 2; the fixed seat plate 71 is provided with a first connection hole group 75, and screws are installed in the first connection hole group 75 to fix the fixed seat plate 71 with the top plate 14 of the cabinet 2. The connection seat plate 72 is extended from the front side of the case 2 and provided with a connection sleeve 73. The top of the box door 13 is provided with a rotating sleeve 15, and the rotating sleeve 15 is sleeved outside or inside the connecting sleeve 73 so as to cooperate with each other to enable the box door 13 to rotate around the central axis of the connecting sleeve 73. Wherein the edge of the door hinge plate 7 is provided with a plurality of fastening positions 74 protruding upwards.

The door hinge box 8 includes a box bottom 81 and a box side plate 82 surrounding the box bottom 81. The box side plate 82 is provided with a plurality of first hooks 83 corresponding to the fastening positions 74 on the door hinge plate 7, and the first hooks 83 are fastened with the fastening positions 74 on the door hinge plate 7 so as to fixedly connect the door hinge plate 7 with the door hinge box 8. Wherein the door hinge plate 7 is completely mounted in the door hinge box 8. A second set of connecting holes 84 is provided in the box bottom 81 of the door hinge box 8, and screws are installed in the second set of connecting holes 84 to fix the door hinge box 8 to the top plate 14 of the box body 2. Wherein, a silencing unit 24 with one end communicated with the atmosphere outside the refrigerator 1 is arranged in the door hinge box 8.

As shown in fig. 1-16, the vacuum pump assembly includes a vacuum pump 3 and a rubber sleeve 9 sleeved outside the vacuum pump 3. The vacuum pump 3 is provided with an exhaust pipe 39 and an exhaust pipe 38. The evacuation pipe 38 is arranged in parallel with the exhaust pipe 39 and is located at the same end of the vacuum pump 3. The first duct 16 is connected to the air exhaust duct 38, and the first duct 16 extends downward along the door 13 and bends at a lower region of the door 13 to extend toward a side of the door 13 close to the refrigerating compartment 10. In this embodiment, a through hole 13a is formed on a side of the door 13 close to the refrigerating chamber 10, and the first pipeline 16 is disposed in the foaming layer of the door 13, extends downward in the foaming layer, and finally passes through the through hole 13 a. The exhaust pipe 39 is connected with a second pipeline 17, the second pipeline 17 extends towards the rotating sleeve 15 and penetrates through the rotating sleeve 15 or the connecting sleeve 73 positioned at the inner ring from bottom to top; one end of the second pipeline 17 far away from the vacuum pump 3 is communicated with a silencing unit 24; the silencing unit 24 can absorb the noise of the gas discharged from the second pipe 17 to optimize the overall performance of the refrigerator and improve the user experience.

Specifically, when the second pipeline 17 is a flexible pipe, the silencing unit 24 and the second pipeline 17 may be directly connected, so as to ensure the rotation function of the door 13 and maintain the connectivity between the silencing unit 24 and the second pipeline 17 when the door 13 is opened or closed; if the second pipeline 17 is a hard pipe, the silencing unit 24 and the second pipeline 17 can be connected through a hose or a rotary joint, so that the rotation function of the door 13 is ensured during the opening or closing process of the door 13, and the connectivity between the silencing unit 24 and the second pipeline 17 is maintained. When the door 13 is closed, the first conduit 16 is in communication with the low pressure storage unit; when the vacuum pump 3 is in operation, the air in the low-pressure storage unit passes through the first pipeline 16, the air suction pipe 38, the vacuum pump 3, the exhaust pipe 39, the second pipeline 17 and the silencing unit 24 communicated with the second pipeline in sequence, and finally is exhausted out of the box body 2 from the other end of the silencing unit 24. So as to avoid the influence of the smell of the food in other areas in the refrigerating chamber 10 caused by the direct discharge of the gas pumped out from the low-pressure storage unit into the refrigerator 1 and the influence of the fresh-keeping effect of the food.

In this embodiment, the second pipeline 17 is disposed in the foaming layer of the refrigerator door 13, extends toward the rotating sleeve 15 in the foaming layer, and finally passes through the rotating sleeve 15 or the connecting sleeve 73 located at the inner ring to communicate with the sound deadening unit 24 communicating with the atmosphere outside the refrigerator 1. In this embodiment, the first pipeline 16 and the second pipeline 17 are arranged to exhaust the gas at a distance from the vacuum pump 3, thereby effectively avoiding the condensation caused by the gas exhausted around the vacuum pump 3. In addition, first pipeline 16 and second pipeline 17 all locate the foaming layer, can utilize the heat insulating ability of foaming layer to make the gas temperature through in first pipeline 16 and the second pipeline 17 obtain certain promotion, lead to the condensation of gas outlet department when can avoiding giving vent to anger.

Specifically, in the present embodiment, the first pipeline 16 extends in a direction perpendicular to the door 13 when passing through the through hole 13 a. When the door 13 is closed, the first pipe 16 is communicated with the low-pressure storage chamber of the low-pressure storage unit; when the door 13 is opened, the first pipe 16 is separated from the low pressure storage unit, and the low pressure storage unit is sealed. As a practical way, a communicating valve is arranged on the low-pressure storage unit, when the box door 13 is closed, the communicating valve is opened under the triggering action of the first pipeline 16, and the first pipeline 16 is communicated with the interior of the low-pressure storage unit; when the door 13 is opened, the first pipe 16 is separated from the low pressure storage unit, the communication valve is closed, and the low pressure storage unit is sealed. The manner of communication is not limited to that described in the present embodiment.

As another practical way, the low pressure storage unit is connected to the door 13, and the first pipeline 16 is directly communicated with the low pressure storage unit; when the door 13 is opened, the door 13 drives the low-pressure storage unit arranged on the door to move out of the low-pressure storage chamber, and a user opens the low-pressure storage unit as required to place and take articles.

The rubber sleeve 9 is abutted against the accommodating part 18, the rubber sleeve 9 is provided with a main body part 91 for mounting the vacuum pump 3, and the main body part 91 is provided with a mounting cavity 92 which is consistent with the shape of the vacuum pump 3; the radial dimension of the mounting cavity 92 of the main body 91 is not larger than the radial dimension of the corresponding position of the vacuum pump 3, so that the rubber sleeve 9 is tightly attached to the vacuum pump 3 and the vibration on the vacuum pump 3 is absorbed.

The periphery of the main body 91 is provided with a plurality of protrusions 93 which are arranged in parallel along the central axis of the main body 91 and surround the main body 91, so as to improve the deformability of the rubber sleeve 9 and improve the vibration damping effect. In this embodiment, the shore hardness of the rubber sleeve 9 is 35 to 40.

The top of the door 13 of the refrigerator 1 is formed with an accommodating portion 18 having an open upper end for accommodating the vacuum pump 3, and a shielding cover 30 is installed at the open end of the accommodating portion 18 to close the open end thereof. A groove 19 is arranged at the edge of the opening end of the containing part 18, and a convex plate 31 matched with the groove 19 is arranged at the edge of the shielding cover 30; the convex plate 31 is arranged in the groove 19; the sealing compound is injected to sealingly connect the cover 30 to the receptacle 18. The arrangement seals the vacuum pump assembly in the accommodating part 18 at the top of the box door 13, so that the whole system is airtight, and the noise generated during the operation of the vacuum pump assembly is effectively prevented from being transmitted out by taking gas as a medium. In this embodiment, the accommodating portion 18 includes a first enclosing plate 47 and first end caps 48 at both ends of the first enclosing plate 47; the inner walls of two opposite first enclosing plates 47 of the accommodating part 18 are provided with second clamping blocks 41; the two opposite sides of the shielding cover 30 are provided with second hooks 32, and the second hooks 32 are matched with the second latch blocks 41 to fixedly connect the shielding cover 30 with the accommodating portion 18.

Both ends of the bottom of the accommodating part 18 are provided with limiting pieces 42, and the two limiting pieces 42 jointly define an installation gap 43 to accommodate the vacuum pump 3; the stoppers 42 abut on both ends of the vacuum pump 3 to limit the position of the vacuum pump 3. The inner wall of the first enclosing plate 47 of the accommodating part 18 is provided with a clamping protrusion 44, and the clamping protrusion 44 is matched with the rubber sleeve 9 to fix the vacuum pump 3. In this embodiment, the locking protrusion 44 abuts against the main body 91 of the rubber sleeve 9, that is, the locking protrusion 44 is located between two adjacent protrusions 93 on the rubber sleeve 9. The above arrangement of the limiting member 42 and the locking protrusion 44 in the accommodating portion 18 can effectively fix the vacuum pump assembly, and is convenient to install.

In this embodiment, the outer diameter of the rubber sleeve 9 (the protrusion 93) is not smaller than the corresponding position of the accommodating portion 18, so that when the rubber sleeve 9 is installed inside the accommodating portion 18, the rubber sleeve 9 contacts with the inner wall of the accommodating portion 18 and can interact with the inner wall of the accommodating portion 18 to generate a friction force, thereby ensuring firm installation.

As shown in fig. 15, and referring to fig. 7-9, the bottom of the receptacle 18 is provided with a first tab 45 extending toward the open end thereof; the first joint 45 is connected to the exhaust pipe 39 of the vacuum pump 3. A cover shell 33 is sleeved outside one end of the accommodating part 18 close to the first joint 45; the outer wall surface of the accommodating part 18 is provided with a first clamping block 46, the housing 33 is provided with a first clamping hole 34 matched with the first clamping block 46, and the accommodating part 18 is fixedly connected with the housing 33 through the matching of the first clamping block 46 and the first clamping hole 34. In this embodiment, the first joint 45 is provided at one end of the accommodating portion 18, and the housing 33 includes a second enclosing plate 35 covering the outside of the first enclosing plate 47 and a second end cap 36 covering the outside of the first end cap 48 on the side of the first joint 45. The first latch 46 is disposed on a first enclosing plate 47 of the accommodating portion 18 and a first end cover 48 close to the first joint 45; the first locking hole 34 is formed in the second enclosing plate 35 and the second end cap 36 of the housing 33 to enhance the connection strength between the housing 33 and the accommodating portion 18 and improve the installation stability.

The housing 33 is provided with a second joint 37, and the second joint 37 is provided with a second pipeline 17. The second tab 37 communicates with the first tab 45 on the first collar 47 of the receptacle 18; i.e., the second joint 37 communicates with the exhaust pipe 39. The second joint 37 comprises a guide post 37a at an end far away from the housing 33, and the guide post 37a is in an inverted cone shape so as to facilitate the installation of the second pipeline 17; a baffle 37b is arranged at the position of the second joint 37, which is close to the housing 33, and a concave ring 37c is arranged between the baffle 37b and the guide post 37a, so that the second pipeline 17 is effectively prevented from falling off; the second line 17 is mounted on the second connector 37 by means of a guide 37a and is stopped by a stop 37 b. The expansion degree of the second pipeline 17 at the concave ring 37c is smaller than that of the second pipeline 17 at the guide post 37a, so that the second pipeline 17 can be effectively prevented from falling off. Wherein the inner diameter of the second pipeline 17 is marked as D₁The outer diameter of the guide post 37a near the end of the concave ring 37c is D₂(ii) a Wherein D is₁＜D₂。

The box door 13 is closed, the first pipeline 16 is communicated with the low-pressure storage unit, and when the vacuum pump 3 works, air in the low-pressure storage unit sequentially passes through the first pipeline 16, the air suction pipe 38, the vacuum pump 3, the exhaust pipe 39, the second pipeline 17 and the silencing unit 24, and is finally exhausted out of the box body 2 through the silencing unit 24. So as to avoid the gas pumped out from the low-pressure storage unit being directly discharged into the refrigerator 1 to cause the food in other areas in the refrigerating chamber 10 to be tainted with each other and influence the fresh-keeping effect of the food; on the other hand, the vacuum pump is arranged on the refrigerator door, so that the vibration can be effectively avoided from being transmitted to the refrigerator body, the noise is reduced, the overall performance of the refrigerator is optimized, and the user experience is improved.

Specifically, as shown in fig. 17 to 25, the accommodating portion 51 for mounting the sound-deadening unit 24 is provided on the box bottom 81 of the door hinge box 8, the sound-deadening unit 24 is wrapped in the accommodating portion 51, and the sound-absorbing layer 52 is provided between the sound-deadening unit 24 and the accommodating portion 51. One end of the silencing unit 24 is communicated with the second pipeline 17, and the other end is communicated with the external atmosphere environment of the refrigerator.

As shown in fig. 20-25, the sound-deadening unit 24 includes a plurality of resonant cavities connected in series, and two adjacent resonant cavities are connected in series by a connecting cavity. The two ends of the silencing unit 24 are respectively provided with a first connecting pipe 251 and a first connecting hole 252 communicated with the resonance cavity; the door hinge box 8 is provided with a second communication hole 85 to realize the communication between the silencing unit 24 and the external atmosphere environment of the refrigerator. In the present embodiment, the second communication hole 85 is provided in a region of the case side plate 82 corresponding to the second end plate 25 b. The muffler unit 24 is connected to the second pipe 17 through the first connection pipe 251, and is connected to the atmosphere outside the refrigerator through the first and second communication holes 252 and 85. When the airflow passes through the silencing unit 24, the airflow needs to pass through a plurality of resonant cavities, and under the action of sound waves, the airflow generates vibration, and when the airflow vibrates, the airflow rubs against the cavity opening walls of the resonant cavities, so that a part of sound energy is converted into heat energy to be dissipated; meanwhile, due to the abrupt change of the acoustic impedance, the acoustic energy is attenuated by reflection and interference of the acoustic wave. When the natural frequency of the system and the frequency of the sound wave resonate, the sound energy is consumed the most, and the noise elimination amount is the largest.

In the present embodiment, the muffler unit 24 includes a first muffler element 25 and a second muffler element 26. The first muffler element 25 and the second muffler element 26 together define a plurality of resonance chambers and connecting chambers arranged at intervals.

The first silencing element 25 comprises a plurality of first resonance portions 253 and first connection portions 254 arranged at intervals. The first resonance portion 253 encloses a first resonance sub-chamber 253a with an opening at one end, the first connection portion 254 encloses a first connection sub-chamber 254a with an opening at one end, and the first resonance sub-chamber 253a is communicated with the first connection sub-chamber 254a to form a first silencing sub-chamber.

The second silencing element 26 comprises a plurality of second resonance subsection 261 and second connection subsection 262 arranged at intervals. Wherein the second resonance subsection 261 encloses a second resonance subchamber 261a with one end open, the second connection subsection 262 encloses a second connection subchamber 262a with one end open, and the second resonance subchamber 261a is communicated with the second connection subchamber 262a to form a second sound deadening subchamber.

The first resonance portion 253 and the first connection portion 254 of the first muffler component 25 correspond one-to-one to the second resonance portion 261 and the second connection portion 262 of the second muffler component 26 in this order. The open end of the first resonance branch 253 is abutted with the open end of the corresponding second resonance branch 261, and the open end of the corresponding second connection branch 262 is abutted with the open end of the corresponding first connection branch 254, so as to form a plurality of complete resonance cavities and connection cavities arranged alternately.

In this embodiment, the first connecting pipe 251 is disposed at one end of the first silencing part 25 and is communicated with the first resonance sub-chamber 253a and/or the first connecting sub-chamber 254 a; the first communicating hole 252 is provided at one end of the second silencing member 26 and communicates with the second resonance subchamber 261a and/or the second connecting subchamber 262 a; after the first silencing part 25 is connected to the second silencing part 26, the first connecting pipe 251 and the first connecting hole 252 are located at both ends of the silencing unit 24.

In this embodiment, the volumes of the resonant cavities are the same; it is also possible to provide resonant cavities with different volumes, such as 4 resonant cavities, 2 of which are a pair, and the volume of which is denoted as V₁The volume of the other two resonant cavities is denoted by V₂In which V is₂≠V₁. Namely, resonant cavities with two volumes are arranged and are connected in series at intervals through connecting cavities.

The first sound deadening member 25 and the second sound deadening member 26 may be formed by ultrasonic welding.

The first sound-attenuating element 25 and the second sound-attenuating element 26 can also be connected by snapping. As shown in fig. 23 to 25, the first resonance part 253 of the first silencing member 25 is provided with a second locking hole 253b at the edge near the opening end thereof; a third clamping block 261b is arranged at the edge of the second resonance subsection 261 of the second silencing piece 26 close to the opening end thereof; when the first resonance portion 253 and the second resonance portion 261 are in opening butt joint, the second blocking hole 253b is matched with the third blocking block 261b, and the first silencing piece 25 and the second silencing piece 26 are connected into a whole. The part of the first silencing piece 25, which is close to the opening end and is far away from the inner edge of the first silencing subchamber, is recessed into the first silencing subchamber to form a mounting table 253 c; the open end of the second silencing element 26 is protruded to the outside of the second silencing subchamber near the inner edge of the second silencing subchamber to form a ring plate 261 c; the mounting platform 253c of the first noise damping member 25 is matched with the annular plate 261c of the second noise damping member 26, so that the cavity wall at the edge of the opening end of the first noise damping member 25 is sleeved on the periphery of the annular plate 261c of the second noise damping member 26, and the sealing performance of the first noise damping member 25 and the second noise damping member 26 is improved.

It should be noted that the cross section of the resonant cavity perpendicular to the flow direction of the gas flow can be circular or square; i.e. the resonance chamber may be cylindrical or cubic.

In this embodiment, a second connection pipe communicating with the sound-deadening chamber 27 may be provided on the second end plate 25b at an end of the sound-deadening unit opposite to the first connection pipe 251, and the second connection pipe passes through the door hinge box 8 to communicate with the atmosphere outside the refrigerator.

According to the invention, when the air flow passes through the silencing unit 24, the air flow needs to pass through a plurality of resonant cavities, and under the action of sound waves, the air flow generates vibration and rubs with the cavity opening wall of the resonant cavities, so that a part of sound energy is converted into heat energy to be dissipated; meanwhile, sound waves are reflected and interfered due to the abrupt change of the acoustic impedance, so that sound energy is attenuated, noise reduction is realized, the overall performance of the refrigerator is optimized, and the user experience is improved.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. The refrigerator is characterized in that: it includes:

a cabinet defining an insulated low temperature storage compartment;

the resonant cavities are distributed at intervals;

2. The refrigerator according to claim 1, wherein: the silencing unit comprises a first silencing piece and a second silencing piece;

3. The refrigerator according to claim 2, wherein:

the first silencing piece and the second silencing piece are formed through ultrasonic welding.

4. The refrigerator according to claim 2, wherein: a second clamping hole is formed in the edge, close to the opening end, of the first resonance part of the first silencing piece; a third clamping block is arranged at the edge of the second resonance subsection of the second silencing piece close to the opening end of the second resonance subsection; when the first resonance part and the second resonance part are in butt joint, the second clamping hole is matched with the third clamping block, and the first silencing piece and the second silencing piece are connected into a whole.

5. The refrigerator of claim 4, wherein: the second silencing piece is provided with a ring plate near the opening end; the opening end of the first silencing piece is close to the inner edge part of the first silencing subchamber and is sunken into the first silencing subchamber to form a mounting table; the mounting table on the first silencing piece is matched with the annular plate of the second silencing piece, so that the cavity wall at the opening end of the first silencing piece is sleeved on the periphery of the mounting table of the second silencing piece.

6. The refrigerator according to any one of claims 1 to 5, wherein: and the box bottom of the door hinge box is provided with a containing part for installing a silencing unit.

7. The refrigerator according to claim 6, wherein: a sound absorbing layer is arranged between the sound attenuation unit and the accommodating part.

8. The refrigerator according to any one of claims 1 to 5, wherein: the two end parts of the silencing unit are respectively provided with a first connecting pipe and a first connecting hole which are communicated with the resonant cavity; the first connecting pipe is communicated with the exhaust pipe through a second pipeline; and the door hinge box is provided with a second communication hole communicated with the atmospheric environment outside the box body, and the second communication hole is communicated with the first communication hole.

9. The refrigerator according to claim 8, wherein: the door hinge plate is provided with a first connecting piece; the box door is provided with a second connecting piece which is rotationally connected with the first connecting piece; wherein the box door rotates around the rotating shaft of the second connecting piece; at least one of the first connecting piece and the second connecting piece is provided with a pipeline channel;

10. The refrigerator according to claim 9, wherein: a foaming layer is arranged in the box door, and the second pipeline is arranged in the foaming layer.