CN109974401A - A kind of vacuum oven - Google Patents
A kind of vacuum oven Download PDFInfo
- Publication number
- CN109974401A CN109974401A CN201910325230.8A CN201910325230A CN109974401A CN 109974401 A CN109974401 A CN 109974401A CN 201910325230 A CN201910325230 A CN 201910325230A CN 109974401 A CN109974401 A CN 109974401A
- Authority
- CN
- China
- Prior art keywords
- drying box
- sealing plate
- vacuum oven
- parcel shelf
- cabinet
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 238000001035 drying Methods 0.000 claims description 70
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000009833 condensation Methods 0.000 abstract description 4
- 230000005494 condensation Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 8
- 230000001939 inductive effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000012476 oxidizable substance Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 230000008542 thermal sensitivity Effects 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/008—Seals, locks, e.g. gas barriers or air curtains, for drying enclosures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/08—Parts thereof
- F26B25/12—Walls or sides; Doors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of vacuum ovens, and cabinet and the openable lid for being used to close side mouth including side mouth are provided with sealing joint strip along open edge at the side mouth of cabinet；Lid includes lid ontology, sealing plate and condensate storage, and lid ontology is connect with body pivot, and sealing plate is fixedly mounted on the inside of lid ontology, and condensate storage level is fixedly mounted on the inside of sealing plate, and condensate storage is opening up；Side mouth is closed, sealing plate is fitted closely with sealing joint strip.The drop flowed down after condensation collects in slot, and need to only be wiped with towel can clean up tank liquid, avoids droplets from the corrosion to sealing joint strip and cabinet edge, greatly prolongs the service life of vacuum oven.
Description
Technical field
The present invention relates to drying box technical field more particularly to a kind of vacuum ovens.
Background technique
Vacuum oven be aim at thermal sensitivity, easily decompose and the drying of readily oxidizable substance and design, when work, can make work
Make the certain vacuum degree of indoor holding, and can internally be filled with inert gas, the article of especially some complicated components also can
Rapid draing is carried out, setting, display and the control of temperature are carried out using Intelligent Digital humidostat.
Presently commercially available vacuum oven includes cabinet and lid, and cabinet is mostly stainless steel cabinet, in opening for vacuum oven
Mouthful side mostly uses greatly the sealing plate of tempered glass material on rubber on cabinet or the sealing joint strip and lid of silica gel material, Lai Shixian
Vacuum oven is in sealing state.
The correct application method of vacuum oven is first to vacuumize the heating that heats up again, after set temperature to be achieved, if hair
Existing vacuum degree adds again when being declined takes out, is conducive to extend the service life of equipment in this way.Sample is done in case
In dry process, water or organic solvent in sample can be converted to gaseous state and be full of in cabinet.Due to vacuum oven open side
Used unit is the material of the poor thermal conductivities such as rubber, glass, and directly contacts with external environment, therefore the temperature of sealing plate wants low
In other plate faces of cabinet.The intracorporal vapor of case or organic vapor can condense to form liquid in the inside of sealing plate in use
It drips and trickles downwards under the effect of gravity, accumulate in the lower edge of sealing plate.Although cabinet edge is mostly stainless steel material, by
Often occur acid, alkalinity or organic environment in practical applications, the condensed fluid accumulation on the downside of sealing plate will lead to sealing
Adhesive tape is corroded softening, stainless steel cabinet edge phenomena such as getting rusty, and causes sealing joint strip that can not be bonded closely with cabinet edge, most
The cabinet of vacuum oven is caused to cannot keep preferable sealing state eventually.
Therefore, a kind of novel vacuum oven is needed.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of vacuum oven.The liquid flowed down after condensation
Drop collects in slot, and need to only be wiped with towel can clean up tank liquid, avoids droplets to sealing joint strip and cabinet edge
Corrosion, greatly prolong the service life of vacuum oven.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
A kind of vacuum oven, the cabinet including opening and the lid for closing side mouth are opened in the side of cabinet
Open edge is provided with sealing joint strip at mouthful；Lid includes lid ontology, sealing plate and condensate storage, lid ontology with
Body pivot connection, sealing plate are fixedly mounted on the inside of lid ontology, and condensate storage level is fixedly mounted on sealing plate
Inside, condensate storage is opening up；When lid closes the opening, sealing plate is fitted closely with sealing joint strip.
Preferably, the bottom of the sealing plate is arranged in the condensate storage.
Preferably, the condensate storage includes curved slab, first baffle and second baffle；The curved surface of the curved slab
Direction first end is fixedly connected with the sealing plate, and the curved surface direction second end of curved slab is located at the curved surface direction first end
Top；The length direction first end of the curved slab is fixedly connected by first baffle with the sealing plate, the curved slab
Length direction second end be fixedly connected by second baffle with the sealing plate.
Preferably, the condensate storage is prepared with sealing plate integrated molding.
Preferably, the cabinet includes drying box, and the shape of the drying box is cuboid；It is accommodated in the drying box
There are sliding slot and parcel shelf, every two sliding slot and a parcel shelf form one layer of placed layer；Described two sliding slots are separately mounted to phase
To on the drying box side plate of setting, the both ends of one parcel shelf are slidably connected with described two sliding slots respectively, make described one
A parcel shelf is horizontal positioned.
Preferably, five layers of placed layer are provided in the drying box, the sliding slot being mounted on same drying box side plate is equal
Even distribution.
Preferably, the sliding slot is the guiding draw runner that intermediate position is groove, and the both ends of the parcel shelf are led with described
Groove cooperation on draw runner.
Preferably, the through-hole of several perforation parcel shelf is offered on the parcel shelf.
Preferably, the drying box side plate is formed by stacking by stainless steel layer and insulating layer, the stainless steel layer and drying box
Internal environment contact.
(3) beneficial effect
The beneficial effects of the present invention are:
1, by cooperating the groove on the both ends of parcel shelf and guiding draw runner, parcel shelf can be swimmingly in drying box
Sliding limits the transverse shifting of parcel shelf convenient for picking and placing parcel shelf, while by the position-limiting action of guiding draw runner.
2, it is formed by stacking by means of the side plate of drying box by stainless steel layer and insulating layer, stainless steel layer and drying box inner loop
Border contact；Drying box has good heat insulation and preservation effect.
3, by being provided with air curtain apparatus at the top of drying box, the opening of air outlet towards the drying box of air curtain apparatus is set
It sets, the wind blown out in air curtain apparatus is used to the hot wind in drying box to keep off in inside, and hot wind in drying box is avoided to iron experiment people
Member.
4, there is condensate storage by means of being horizontally disposed in the inside of sealing plate, and condensate storage is opening up,
The drop flowed down after condensation collects in slot, and need to only be wiped with towel can clean up tank liquid, avoids droplets to close
The corrosion of seal strip and cabinet edge greatly prolongs the service life of vacuum oven.
Detailed description of the invention
The present invention is described by means of the following drawings:
Fig. 1 is the structure chart of vacuum oven in the specific embodiment of the invention；
Fig. 2 is the perspective view of vacuum oven in the specific embodiment of the invention；
Fig. 3 is the structure chart of sealing plate in the specific embodiment of the invention；
Fig. 4 is the structure chart of parcel shelf in the specific embodiment of the invention.
[description of symbols]
1: pedestal；
2: cabinet；
21: drying box；211: guiding draw runner；212: parcel shelf；213: heating device；214: temperature-detecting device；215:
Humidity detector；216: through-hole；217: stainless steel layer；218: insulating layer；
22: storage box；221: vacuum pump；222: the first snorkels；223: air curtain apparatus；224: demarcation plate；225: air-supply
Machine；226: the second snorkels；
3: lid；
31: sealing joint strip；
32: lid ontology；321: groove；322: inductive switch；323: convex block；
33: sealing plate；331: condensate storage.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
It should be noted that this refers to that, towards the side inside drying box, " outside " refers to court with " inside " in novel
To the side outside drying box.
The present invention provides a kind of vacuum oven, as illustrated in fig. 1 and 2, including pedestal 1, side mouth cabinet 2 and can beat
That opens is used to close the lid 3 of side mouth, and cabinet 2 is fixedly mounted on pedestal 1, and lid 3 and cabinet 2 are rotatablely connected.
Cabinet
Cabinet 2 includes drying box 21 and storage box 22.
Drying box 21 is provided with to the body structure of opening, drying box 21 is fixedly mounted on pedestal 1, makes drying box
It is open towards side, it is preferable that the shape of drying box 21 is cuboid.Accommodated in drying box 21 sliding slot, parcel shelf 212,
Heating device 213, temperature-detecting device 214 and humidity detector 215.Every two sliding slot and a parcel shelf 212 are formed
One layer of placed layer, described two sliding slots are separately mounted on the drying box side plate being oppositely arranged, and the two of one parcel shelf 212
End is slidably connected with described two sliding slots respectively, keeps one parcel shelf horizontal positioned, for placing drying sample.It is preferred that
Ground is provided with five layers of placed layer in drying box 21, and the sliding slot being mounted on same drying box side plate is uniformly distributed.It is further excellent
Selection of land, sliding slot are the guiding draw runner 211 that intermediate position is groove, the groove on the both ends and guiding draw runner 211 of parcel shelf 212
Cooperation；So that parcel shelf is swimmingly slided in drying box, convenient for picking and placing parcel shelf, while being made by the limit of guiding draw runner
With limiting the transverse shifting of parcel shelf.
Heating device 213 is arranged on the bottom plate of drying box, and heating device 213 uses electrical heating type.Preferably, parcel shelf
The through-hole 216 of several perforation parcel shelf is offered on 212, as shown in Figure 4；After heating device work, heat is gradually outside
Heat, is quickly communicated up by radiation by through-hole, ensure that the multiple heat by heat space separated in drying box by parcel shelf
It measures almost the same.To keep the drying progress of all drying samples in drying box consistent, the drying efficiency of drying box is improved.
Preferably, the side plate of drying box is formed by stacking by stainless steel layer 217 and insulating layer 218, stainless steel layer and drying box internal environment
Contact；Make drying box that there is good heat insulation and preservation effect.
The top of drying box side plate is arranged in temperature-detecting device 214 and humidity detector 215, and it is dry to be respectively intended to monitoring
Temperature and humidity in dry case.
Closed body structure is set by storage box 22, storage box 22 is fixedly mounted on pedestal 1, and storage box 22 is tight
Suffer the setting of drying box 21.Accommodate vacuum pump 221 and the first snorkel 222 in storage box, the first end of the first snorkel 222 with
The air entry of vacuum pump 221 is connected to, and the second end of the first snorkel 222 is connected to drying box 21；For being taken out to drying box
Vacuum.
Preferably, it is provided with air curtain apparatus 223 at the top of drying box, the air outlet of air curtain apparatus 223 is towards drying box
21 opening setting；It is provided with demarcation plate 224 in storage box 22, storage box 22 is divided into two enclosure spaces, respectively
Upper storage chamber and lower storage chamber, lower storage chamber is for placing vacuum pump 221 and the first snorkel 222, upper storage chamber
Pressure fan 225 and the second snorkel 226 are inside accommodated, the first end of the second snorkel 226 and the gas outlet of pressure fan 225 connect
Logical, the second end of the second snorkel 226 is connected to the air inlet of air curtain apparatus 223.The wind blown out in air curtain apparatus is used to dry
Hot wind in dry case is kept off in inside, and hot wind in drying box is avoided to iron experimenter.
Lid 3
The edge of opening is provided with sealing joint strip 31 in the opening of drying box 21, sealing joint strip is silica gel or rubber material
Matter；Lid 3 includes lid ontology 32 and sealing plate 33, and lid ontology 32 and drying box 21 are rotatablely connected, for closing drying box
Opening, sealing plate 33 is fixedly mounted on the inside of lid ontology 32, when lid 3 closes the opening of drying box, sealing plate 33
It is fitted closely with sealing joint strip 31.It ensure that closed vacuum oven is in high-seal state, convenient for system inside drying box
Make vacuum environment.
Preferably, being horizontally disposed in the inside of sealing plate has condensate storage 331, and condensate storage 331 is open
Upward, as shown in Figure 3；During sample is dried in case, the drop flowed down after condensation is collected in slot, and
And only tank liquid need to can be cleaned up with towel wiping, to avoid droplets from the corrosion to sealing joint strip and cabinet edge, greatly
The big service life for extending vacuum oven.The position of condensate storage and length tightly fit into original according to sealing joint strip
It is then determined, structure can be sealing plate overall processing at slotted plate and by the condensate storage of the materials such as plastics
Adherency, inlay card are on sealing plate.
Preferably, the bottom of sealing plate is arranged in condensate storage.Preferably, condensate storage include curved slab,
First baffle and second baffle；The curved surface direction first end of curved slab is fixedly connected with sealing plate, and the curved surface direction of curved slab
Second end is located at the top of curved surface direction first end；The length direction first end of curved slab is fixed by first baffle and sealing plate
Connection, the length direction second end of curved slab are fixedly connected by second baffle with sealing plate.
It is further preferred that opening up fluted 321 in the top of lid ontology 32, thoughts are fixedly mounted in groove 321
Inductive switch 322 is equipped with convex block 323 in the side of lid ontology 32, and convex block 323 is snapped connection with drying box 21, convex block 323 and sense
Inductive switch 322 is electrically connected, and inductive switch 322 and pressure fan 225 are electrically connected.When lid is closed, inductive switch is disconnected, air-supply
Machine stops working, and when lid is opened, inductive switch closure, pressure fan is started to work.
Working principle
Drying sample is placed on placed layer, dry box opening is closed, vacuum pump work takes out the air in drying box
Out, heating device carries out heat temperature raising to drying box；After drying, lid is opened, pressure fan works, and blows out in air curtain apparatus
Wind in drying box hot wind keep off in inside, avoid hot wind in drying box from ironing experimenter.
It is to be appreciated that describing the skill simply to illustrate that of the invention to what specific embodiments of the present invention carried out above
Art route and feature, its object is to allow those skilled in the art to can understand the content of the present invention and implement it accordingly, but
The present invention is not limited to above-mentioned particular implementations.All various changes made within the scope of the claims are repaired
Decorations, should be covered by the scope of protection of the present invention.
Claims (9)
1. a kind of vacuum oven, the cabinet (2) including opening and the lid (3) for closing side mouth, which is characterized in that
Open edge is provided with sealing joint strip (31) in the opening of cabinet (2)；
The lid (3) includes lid ontology (32), sealing plate (33) and condensate storage (331), the lid ontology
(32) it is rotatablely connected with the cabinet (2), the sealing plate (33) is fixedly mounted on the inside of the lid ontology (32), described
Condensate storage (331) level is fixedly mounted on the inside of the sealing plate (33), condensate storage (331) opening
Upward；
When lid closes the opening, the sealing plate (33) fits closely with the sealing joint strip (31).
2. vacuum oven according to claim 1, which is characterized in that the condensate storage (331) is arranged in institute
State the bottom of sealing plate (33).
3. vacuum oven according to claim 1, which is characterized in that the condensate storage (331) includes curved surface
Plate, first baffle and second baffle；
The curved surface direction first end of the curved slab is fixedly connected with the sealing plate (33), and the curved surface direction second of curved slab
End is located at the top of the curved surface direction first end；
The length direction first end of the curved slab is fixedly connected by first baffle with the sealing plate (33), the curved slab
Length direction second end be fixedly connected with the sealing plate (33) by second baffle.
4. vacuum oven according to any one of claims 1 to 3, which is characterized in that the condensate storage (331)
It is integrally formed and is prepared with the sealing plate (33).
5. vacuum oven according to claim 4, which is characterized in that the cabinet (2) includes drying box (21), described
The shape of drying box (21) is cuboid；
Sliding slot and parcel shelf (212), every two sliding slot and parcel shelf (212) composition are accommodated in the drying box (21)
One layer of placed layer；
Described two sliding slots are separately mounted on the drying box side plate being oppositely arranged, the both ends point of one parcel shelf (212)
It is not slidably connected with described two sliding slots, keeps one parcel shelf horizontal positioned.
6. vacuum oven according to claim 5, which is characterized in that be provided with five layers in the drying box (21) and put
Layer is set, the sliding slot being mounted on same drying box side plate is uniformly distributed.
7. vacuum oven according to claim 5, which is characterized in that the sliding slot is that intermediate position is leading for groove
To draw runner (211), the groove on the both ends of the parcel shelf (212) and guiding draw runner (211) cooperates.
8. vacuum oven according to claim 5, which is characterized in that offer several on the parcel shelf (212)
Penetrate through the through-hole (216) of parcel shelf.
9. vacuum oven according to claim 5, which is characterized in that the drying box side plate is by stainless steel layer (217)
It is formed by stacking with insulating layer (218), the stainless steel layer is contacted with drying box internal environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910325230.8A CN109974401A (en) | 2019-04-22 | 2019-04-22 | A kind of vacuum oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910325230.8A CN109974401A (en) | 2019-04-22 | 2019-04-22 | A kind of vacuum oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109974401A true CN109974401A (en) | 2019-07-05 |
Family
ID=67085648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910325230.8A Pending CN109974401A (en) | 2019-04-22 | 2019-04-22 | A kind of vacuum oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109974401A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498115A (en) * | 2019-09-02 | 2019-11-26 | 匡宇翔 | Vacuum heat insulation device with free gas adsorption element |
| CN110897496A (en) * | 2019-11-29 | 2020-03-24 | 广东美的厨房电器制造有限公司 | Cooking apparatus |
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