CN114856964A - Evacuating device and refrigeration equipment - Google Patents
Evacuating device and refrigeration equipment Download PDFInfo
- Publication number
- CN114856964A CN114856964A CN202110151563.0A CN202110151563A CN114856964A CN 114856964 A CN114856964 A CN 114856964A CN 202110151563 A CN202110151563 A CN 202110151563A CN 114856964 A CN114856964 A CN 114856964A
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- China
- Prior art keywords
- base sleeve
- vacuum pump
- shell
- installation base
- mounting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005057 refrigeration Methods 0.000 title abstract description 7
- 238000009434 installation Methods 0.000 claims abstract description 26
- 238000005086 pumping Methods 0.000 claims description 11
- 229920000742 Cotton Polymers 0.000 claims description 9
- 239000011358 absorbing material Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 abstract description 4
- 239000000725 suspension Substances 0.000 abstract description 3
- 238000013016 damping Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0033—Pulsation and noise damping means with encapsulations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0044—Pulsation and noise damping means with vibration damping supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0083—Pulsation and noise damping means using blow off silencers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/14—Provisions for readily assembling or disassembling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention relates to the technical field of vacuum preservation, and discloses a vacuumizing device and refrigeration equipment, which comprise a vacuum pump, an air pipe connected with the vacuum pump, a mounting base sleeve and at least two elastic cantilevers, wherein the mounting base sleeve is arranged on the air pipe; the vacuum pump is wrapped in the installation base sleeve, and the air pipe penetrates out of the installation base sleeve; one end of the elastic cantilever is connected with the installation base sleeve, the other end of the elastic cantilever is used for being connected with an external fixing structure, and the elastic cantilever is distributed along the circumferential direction of the installation base sleeve to ensure the suspended installation of the installation base sleeve. The novel vibration damper is not rigidly connected integrally, can effectively avoid loosening and vibration impact and block vibration conduction in a flexible suspension fixing mode, thereby realizing the vibration damping effect, and meanwhile, the wrapping structure is favorable for noise reduction.
Description
Technical Field
The invention relates to the technical field of vacuum preservation, in particular to a vacuumizing device and refrigeration equipment.
Background
The vacuum preservation technology is an ideal food material storage technology, the system form and structure of the vacuum pumping device are realized by relating to multiple dimensions of the application of the vacuum preservation technology, such as cost, reliability, safety, experience and the like, and the problem which is most difficult to solve in practical application is that the vibration and noise of a vacuum pump of the vacuum pumping system are large during working.
Thus, improvements in the prior art are needed.
Disclosure of Invention
The purpose of the invention is: the utility model provides an evacuating device and refrigeration plant to solve prior art evacuating system's vacuum pump during operation vibration and noise all great technical problem.
In order to achieve the purpose, the invention provides a vacuum pumping device, which comprises a vacuum pump and an air pipe connected with the vacuum pump, wherein the vacuum pumping device also comprises a mounting base sleeve and at least two elastic cantilevers;
the vacuum pump is wrapped in the installation base sleeve, and the air pipe penetrates out of the installation base sleeve;
one end of the elastic cantilever is connected with the installation base sleeve, the other end of the elastic cantilever is used for being connected with an external fixing structure, and the elastic cantilever is distributed along the circumferential direction of the installation base sleeve to ensure the suspended installation of the installation base sleeve.
In some embodiments of the present application, the vacuum pump further comprises a sound-absorbing material layer between the inner surface of the mounting base and the outer surface of the vacuum pump.
In some embodiments of the present application, the sound-absorbing material layer includes a first shell and a second shell that can be fastened to each other, and a cavity for accommodating the vacuum pump is formed inside the first shell and the second shell after being fastened to each other.
In some embodiments of this application, inhale the sound material layer and be inhaleing the sound cotton, inhale the cotton preforming and obtain first layer of shell and second layer of shell, first layer of shell and second layer of shell lock back formation the volume of cavity is less than the volume of vacuum pump.
In some embodiments of the present application, the number of the elastic cantilevers is even, and the elastic cantilevers are arranged opposite to each other.
In some embodiments of the present application, the elastic cantilever includes a spring, and a first connecting member and a second connecting member disposed at two ends of the spring, wherein the first connecting member is used for connecting the mounting base sleeve, and the second connecting member is used for connecting the external fixing structure.
In some embodiments of the present application, the outer surface of the mounting base sleeve is provided with a mounting ring, and the end of the first connecting member is in a hook shape or a circular ring shape so as to be connected with the mounting ring.
In some embodiments of the present application, the external fixation structure includes a base and a mounting post; the mounting column is vertically arranged on the base, the end part of the second connecting piece is annular, and the second connecting piece can be sleeved on the mounting column.
In some embodiments of the present application, when the vacuum pumping device is not installed, a distance between the second connecting members of any two opposite elastic cantilevers is smaller than a distance between two corresponding mounting posts of the two elastic cantilevers, so that after the vacuum pumping device is installed, the spring of each elastic cantilever is in an elongated state.
In some embodiments of the present application, the mounting base sleeve is a rubber sleeve.
The application also provides a refrigerating device which comprises the vacuumizing device.
Compared with the prior art, the vacuumizing device provided by the embodiment of the invention has the beneficial effects that:
according to the vacuum pumping device and the refrigeration equipment provided by the embodiment of the invention, the vacuum pump is wrapped by the mounting base sleeve and then suspended and fixed by the elastic cantilever. The novel vibration damper is not rigidly connected integrally, can effectively avoid loosening and vibration impact and block vibration conduction in a flexible suspension fixing mode, thereby realizing the vibration damping effect, and meanwhile, the wrapping structure is favorable for noise reduction.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a vacuum evacuation apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of the vacuum apparatus with the flexible cantilever removed;
FIG. 3 is a schematic front view of the vacuum pump, the mounting base, and the sound-absorbing material layer;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view B-B of FIG. 3;
FIG. 6 is a schematic view showing the structure of the vacuum evacuation apparatus connected to an external device;
FIG. 7 is a schematic view of the structure of the elastic cantilever;
FIG. 8 is a schematic structural view of an external fixation structure;
in the figure, 1, a vacuum pump; 2. an air tube; 3. installing a base sleeve; 31. a mounting ring; 4. a flexible cantilever; 41. a first connecting member; 42. a second connecting member; 43. a spring; 5. an external fixation structure; 51. a base; 52. mounting a column; 6. a sound absorbing material layer; 100. and (4) an external device.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
As shown in fig. 1, a vacuum pumping apparatus according to a preferred embodiment of the present invention mainly includes a vacuum pump 1, an air tube 2 connected to the vacuum pump 1, a mounting base 3, and at least two elastic cantilevers 4.
Referring to fig. 4 and 5, the vacuum pump 1 is enclosed in the installation base housing 3, and the air pipe 2 passes through the installation base housing 3 and is connected to an external device 100, as shown in fig. 6.
One end of the elastic cantilever 4 is connected with the mounting base sleeve 3, and the other end of the elastic cantilever is used for connecting an external fixing structure 5, wherein the external fixing structure 5 is a structure which can be mounted inside equipment. All the elastic cantilevers 4 are distributed along the circumferential direction of the installation base sleeve to ensure that the installation base sleeve 3 is installed in a suspended mode.
In some embodiments of the present application, referring to fig. 4 and 5, a sound absorbing material layer 6 is further provided between the inner surface of the mounting base 3 and the outer surface of the vacuum pump 1.
In some embodiments of the present application, the sound-absorbing material layer 6 includes a first shell and a second shell that can be fastened to each other, and a cavity for accommodating the vacuum pump 1 is formed inside the first shell and the second shell after being fastened to each other.
In some embodiments of this application, inhale sound material layer 6 preferably and inhale the sound cotton, inhale the cotton preforming and obtain first layer of shell and second layer of shell, the volume of this cavity that forms after first layer of shell and the lock of second layer of shell slightly is less than vacuum pump 1's volume for when vacuum pump 1 was arranged in this cavity, inhale the cotton extrusion parcel vacuum pump 1 of sound.
In some embodiments of the present application, an even number of the elastic cantilevers are disposed opposite to each other. Referring to fig. 1, in the present embodiment, four elastic cantilevers 4 are provided and are respectively located at four corners of the mounting base sleeve 3, so as to ensure that the structure is more stable when the mounting base sleeve 3 is mounted in a suspended manner.
In some embodiments of the present application, referring to fig. 7, the elastic cantilever 4 comprises a spring 43, and a first connecting member 41 and a second connecting member 42 provided at both ends of the spring 43, the first connecting member 41 is used for connecting the mounting base sleeve 3, and the second connecting member 42 is used for connecting the external fixing structure 5.
In some embodiments of the present application, referring to fig. 3, the mounting base sleeve 3 is externally provided with a mounting ring 31 (the mounting ring 31 is not shown in fig. 2), and the end of the first connecting member 41 is hook-shaped or ring-shaped for connecting with the mounting ring 31.
In some embodiments of the present application, referring to fig. 8, the external fixing structure 5 includes a base 51 and a mounting post 52, the mounting post 52 is vertically disposed on the base 51, the end of the second connecting member 42 is annular, and the second connecting member 42 can be sleeved on the mounting post 52.
In some embodiments of the present application, when the vacuum extractor is not installed, the distance between the second connecting members 42 of any two opposite elastic cantilevers 4 is smaller than the distance between the two installation posts 52 corresponding to the two elastic cantilevers 4, so that the spring 43 of each elastic cantilever 4 is in an elongated state after the vacuum extractor is installed.
In some embodiments of the present application, the mounting base 3 is a rubber sleeve.
During actual assembly, the vacuum pump 1 is wrapped by the first shell and the second shell, and the pre-formed sound-absorbing cotton inner wall presses the vacuum pump 1 to form a wrapping body. Then, the inclusion is inserted into the inner cavity of the mounting base 3 to form an assembly body. And then one end of each elastic cantilever 4 is connected with the mounting base sleeve 3, the other end of each elastic cantilever is hung on the mounting column 52, and the four elastic cantilevers 4 are mounted one by one to enable the assembly body to be suspended.
To sum up, compared with the prior art, the vacuum pumping device provided by the invention at least comprises the following beneficial effects:
the vacuum pump 1 is wrapped by the mounting base sleeve 3 and then suspended and fixed by the elastic cantilever 4. The invention has no rigid connection as a whole, can effectively avoid loosening and vibration impact in a flexible suspension fixing mode, and blocks vibration conduction, thereby realizing the effect of vibration reduction. Meanwhile, the wrapping structure is beneficial to noise reduction.
Furthermore, sound absorption cotton is arranged between the vacuum pump 1 and the installation base sleeve 3 and clings to the surface of the vacuum pump 1, so that a better noise reduction effect can be achieved.
Furthermore, the invention makes each elastic cantilever 4 in a stretched state after installation, and the pre-tension design can more effectively counteract the vibration impact.
The invention also provides a refrigerating device, which is internally provided with the vacuumizing device in any embodiment. Specifically, the refrigeration equipment can be equipment such as a refrigerator and a fresh-keeping freezer.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A vacuum pumping device comprises a vacuum pump and an air pipe connected with the vacuum pump, and is characterized by also comprising an installation base sleeve and at least two elastic cantilevers;
the vacuum pump is wrapped in the installation base sleeve, and the air pipe penetrates out of the installation base sleeve;
one end of the elastic cantilever is connected with the installation base sleeve, the other end of the elastic cantilever is used for being connected with an external fixing structure, and the elastic cantilever is distributed along the circumferential direction of the installation base sleeve to ensure the suspended installation of the installation base sleeve.
2. The evacuation device of claim 1, further comprising a layer of sound absorbing material between an inner surface of the mounting base and an outer surface of the vacuum pump.
3. The vacuum pumping device as claimed in claim 2, wherein the sound-absorbing material layer comprises a first shell and a second shell which can be fastened together, and a cavity for accommodating the vacuum pump is formed inside the first shell and the second shell after being fastened together.
4. The vacuum extractor according to claim 3, wherein the sound-absorbing material layer is made of sound-absorbing cotton, the sound-absorbing cotton is preformed to obtain the first shell and the second shell, and the volume of the cavity formed by the first shell and the second shell after being fastened is smaller than the volume of the vacuum pump.
5. The evacuation device according to claim 1, wherein the elastic cantilever is provided in an even number and arranged opposite to each other two by two.
6. The evacuation device of claim 5, wherein the resilient cantilever comprises a spring and first and second connectors disposed at opposite ends of the spring, the first connector configured to connect to the mounting base and the second connector configured to connect to the external fixation structure.
7. The vacuum extractor as claimed in claim 6, wherein the outer surface of the mounting base sleeve is provided with a mounting ring, and the end of the first connecting member is hook-shaped or circular for connecting with the mounting ring.
8. The evacuation device of claim 6, wherein the external fixation structure comprises a base and a mounting post; the mounting column is vertically arranged on the base, the end part of the second connecting piece is annular, and the second connecting piece can be sleeved on the mounting column.
9. The vacuum extractor of claim 8, wherein when the vacuum extractor is not installed, the distance between the second connecting members of any two opposite elastic cantilevers is smaller than the distance between the two corresponding mounting posts of the two elastic cantilevers, so that the spring of each of the elastic cantilevers is in an elongated state after the vacuum extractor is installed.
10. A cold storage appliance comprising an evacuation device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110151563.0A CN114856964A (en) | 2021-02-05 | 2021-02-05 | Evacuating device and refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110151563.0A CN114856964A (en) | 2021-02-05 | 2021-02-05 | Evacuating device and refrigeration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114856964A true CN114856964A (en) | 2022-08-05 |
Family
ID=82622869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110151563.0A Pending CN114856964A (en) | 2021-02-05 | 2021-02-05 | Evacuating device and refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114856964A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201746703U (en) * | 2010-06-17 | 2011-02-16 | 海信容声(广东)冰箱有限公司 | Vibration and noise reduction washing machine |
| CN207212620U (en) * | 2017-07-04 | 2018-04-10 | 天津宝润真空设备有限公司 | Vavuum pump anti-vibration noise reducing mounting bracket |
| CN210977791U (en) * | 2019-10-10 | 2020-07-10 | 江阴悦达化纺有限公司 | Low-noise vacuum pump |
| CN211230751U (en) * | 2019-12-23 | 2020-08-11 | 白音华金山发电有限公司 | Vacuum pump with noise reduction function |
| CN111947376A (en) * | 2020-08-14 | 2020-11-17 | 海信容声（扬州）冰箱有限公司 | A kind of refrigerator |
| US20200393193A1 (en) * | 2017-12-11 | 2020-12-17 | Qingdao Haier Co., Ltd. | Refrigerator |
| CN112146324A (en) * | 2020-09-22 | 2020-12-29 | 海信容声(广东)冷柜有限公司 | Refrigerating device |
| CN212429132U (en) * | 2020-05-26 | 2021-01-29 | 旭莲助剂(上海)有限公司 | Vacuum pump with noise reduction function |
-
2021
- 2021-02-05 CN CN202110151563.0A patent/CN114856964A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201746703U (en) * | 2010-06-17 | 2011-02-16 | 海信容声(广东)冰箱有限公司 | Vibration and noise reduction washing machine |
| CN207212620U (en) * | 2017-07-04 | 2018-04-10 | 天津宝润真空设备有限公司 | Vavuum pump anti-vibration noise reducing mounting bracket |
| US20200393193A1 (en) * | 2017-12-11 | 2020-12-17 | Qingdao Haier Co., Ltd. | Refrigerator |
| CN210977791U (en) * | 2019-10-10 | 2020-07-10 | 江阴悦达化纺有限公司 | Low-noise vacuum pump |
| CN211230751U (en) * | 2019-12-23 | 2020-08-11 | 白音华金山发电有限公司 | Vacuum pump with noise reduction function |
| CN212429132U (en) * | 2020-05-26 | 2021-01-29 | 旭莲助剂(上海)有限公司 | Vacuum pump with noise reduction function |
| CN111947376A (en) * | 2020-08-14 | 2020-11-17 | 海信容声（扬州）冰箱有限公司 | A kind of refrigerator |
| CN112146324A (en) * | 2020-09-22 | 2020-12-29 | 海信容声(广东)冷柜有限公司 | Refrigerating device |
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