CN206543123U - A kind of samming pan of pot bottom containing vacuum chamber - Google Patents
A kind of samming pan of pot bottom containing vacuum chamber Download PDFInfo
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- CN206543123U CN206543123U CN201621307807.0U CN201621307807U CN206543123U CN 206543123 U CN206543123 U CN 206543123U CN 201621307807 U CN201621307807 U CN 201621307807U CN 206543123 U CN206543123 U CN 206543123U
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Abstract
The utility model is related to a kind of samming pan of pot bottom containing vacuum chamber, including pot bottom wall, first pot of body sidewall and second pot of body sidewall being connected with the first pot sidewall upper, there is interconnected vacuum chamber in first pot of body sidewall and pot bottom wall, having in vacuum chamber in pot bottom wall in liquid phase-change working medium, the vacuum chamber of first pot of body sidewall has liquid-sucking core.The utility model in the vacuum chamber of first pot of body sidewall due to having liquid-sucking core, after liquid refrigerant in the vacuum chamber in heat pot bottom wall, its volatilize immediately for gas and be transmitted to first pot of body sidewall vacuum chamber top diffusion, and the working medium after being cooled occurs condensation and is changed into liquid, and flow to along thermal conductive cavity in the vacuum chamber in pot bottom part, again evaporate by heat, so move in circles, it is ensured that the temperature field of whole the bottom of a pan bottom wall and the first pot inside sidewalls diverse location is consistent and can improve heat efficiency substantially.
Description
Technical field
The utility model is related to a kind of samming pan of pot bottom containing vacuum chamber, belongs to soaking pan field.
Background technology
At present can the material of electric cooker or inner tub of pressure cooker be generally aluminium alloy or aluminium alloy/stainless steel clad plate, they
Mainly by spraying PTFE (Teflon) etc. in internal layer aluminium surface, stickness paint does not realize its surface during cooking not
It is stained with effect., may be to the body of consumer but these non-sticky coating wear resistances are poor, are easier to come off, after being absorbed by the body
Body health produces potential safety hazard.Thus there are the companies such as Datong District's electrical equipment, the profit Tang electrical equipment in Shenzhen in Taiwan to develop electric hot tray heating
Healthy uncoated inner bag pot, reach the non-sticky effect of certain physics by being controlled to temperature of boiler.Due to the heating of interior pot
The influence of temperature distribution evenness, uncoated pan bottom is heated when comparing concentration, and the non-sticky effect of physics in the bottom of a pan is poor, rice
It is easy to stick in the bottom of a pan and the pastel also more difficult cleaning at this.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of samming pan of pot bottom containing vacuum chamber, overcomes existing
Have in technology to prevent heating-up temperature skewness increases non-sticky coating from preventing viscous pot from causing the presence of potential safety hazard and heat
The defect that can not effectively utilize.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of samming pot of pot bottom containing vacuum chamber
Tool, including pot bottom wall and the pot body sidewall for being connected to the week side of boss of pot bottom wall four, the pot body sidewall include the first pot
Side wall and second pot of body sidewall being connected with the first pot sidewall upper, first pot of body sidewall and the pot bottom wall
Have to be heated in the interior vacuum chamber having in interconnected vacuum chamber, the pot bottom wall and gaseous liquid can be converted into from liquid
There is liquid-sucking core in state phase-change working substance, the vacuum chamber of first pot of body sidewall.
The beneficial effects of the utility model are：The utility model in the vacuum chamber of first pot of body sidewall due to having
Liquid-sucking core, when to heating outside pot bottom wall, after liquid refrigerant in the vacuum chamber in heat pot bottom wall, it is immediately
Volatilize for gas and be transmitted to first pot of body sidewall vacuum chamber top (condensation end) diffusion, at the same time along with heat
Conduction；And the working medium after being cooled occurs condensation and is changed into liquid, and it is flow to along thermal conductive cavity in the vacuum chamber in pot bottom part,
Again evaporate by heat, so move in circles, it is ensured that the temperature of whole the bottom of a pan bottom wall and the first pot inside sidewalls diverse location
Field is consistent substantially.
During conventional culinary, during due to cooking food, the capacity of food is predominantly located in pot below maximum stage line
Region, thus be even more important by controlling the uniform distribution of the temperature field height of pan middle and lower part position, the utility model leads to
Cross and side middle and lower part temperature field in the compound pot body containing vacuum chamber is precisely controlled, it is ensured that internal layer pot different zones are heated equal
It is even, so as to realize that it has the good non-sticky effect of physics during cooking and improves heating efficiency.
On the basis of above-mentioned technical proposal, the utility model can also do following improvement.
A kind of the utility model samming pan of pot bottom containing vacuum chamber as described above, further, the first pot side
Wall and the pot bottom wall include inner casing and shell, and the inner casing and shell shape be mutually adapted, the inner casing and shell it
Between be the vacuum chamber；The lower end of second pot of body sidewall is fixed with the inner casing of first pot of body sidewall and the upper end of shell
And sealing welding or integrally connected.
Beneficial effect using above-mentioned further scheme is：Can by machining shape the different inner casing of identical, volume and
Shell, can facilitate and liquid-sucking core is processed on the outside of inner casing or on the inside of shell.
A kind of the utility model samming pan of pot bottom containing vacuum chamber as described above, further, the pot bottom wall, the
One pot of body sidewall and second pot of body sidewall are made into integration.
Beneficial effect using above-mentioned further scheme is：The bulk strength of pot is provided.
A kind of the utility model samming pan of pot bottom containing vacuum chamber as described above, further, the pot bottom wall, the
One pot of body sidewall and second pot of body sidewall include inner casing and shell, and the inner casing and shell of second pot of body sidewall are compressed on one
Rise and be brought into close contact.
Beneficial effect using above-mentioned further scheme is：It is easy to industrial processes to manufacture and improves the overall intensity of pot.
A kind of the utility model samming pan of pot bottom containing vacuum chamber as described above, further, the pot bottom wall and
First pot of body sidewall includes inner casing and shell, and second pot of body sidewall upwardly extends shape for the inner casing of first pot of body sidewall
Into the shell upper end and the lower end of second pot of body sidewall of first pot of body sidewall are sealedly and fixedly connected, or the second pot
Side wall upwardly extends to be formed for the shell of first pot of body sidewall, inner casing upper end and second pot of first pot of body sidewall
The lower end of side wall is sealedly and fixedly connected.
A kind of the utility model samming pan of pot bottom containing vacuum chamber as described above, further, the first pot side
The shell upper of wall is communicated with the hollow pipe of the vacuum chamber.The hollow pipe typically uses metal tube.The hollow pipe is used for
To liquid phase-change working medium described in the bottom injection of the vacuum chamber, and the air in the vacuum chamber is set to be arranged by the hollow pipe
Go out.Can be specifically in pot shell at the position on top opened hole (such as a diameter of 3mm or so through hole), be inserted into
It is close with the metal tube (such as metal hollow copper pipe) of diameter, then by the contact position progress welding of metal tube and first pot of body sidewall
Envelope, realize that metal tube is connected with the closed of vacuum chamber, with by bottom injection liquid phase-change working medium from the metal tube to vacuum chamber,
And the air in hollow cavity is excluded, make to keep vacuum state in vacuum chamber.
A kind of the utility model samming pan of pot bottom containing vacuum chamber as described above, further, the liquid-sucking core is two
Bar above porous foam metal bar, the porous foam metal bar is adapted to the first pot sidewall shape and its both sides is connected
On the outside of the inner casing and on the inside of the shell (thickness of the porous foam metal bar is adapted with the width of the vacuum chamber),
It is the vacuum chamber between the porous foam metal bar.In such scheme, it is preferable that the porous foam metal bar can be with
For porous foam copper bar, porous foam aluminum strip or porous foam nickel bar.
In such scheme, it is preferable that the width of porous foam metal bar be 5~15 millimeters, porous foam metal bar it
Between spacing be 3~10 millimeters.
A kind of the utility model samming pan of pot bottom containing vacuum chamber as described above, further, the liquid-sucking core is many
Hole foam metal layer, the porous foam metal layer is arranged on the outside of the inner casing of first pot of body sidewall or on the inside of shell.
In such scheme, it is preferable that the average pore size of porous foam metal layer is 0.2~5mm, porosity is 70%~
80%, thickness is 1~5mm, and the width of the vacuum chamber is more than the thickness of porous foam metal layer, and its scope can be selected
For 1.5mm~6mm.The width of above-mentioned vacuum chamber is the outside wall surface of the pot inner casing and the internal face of the pot shell
Between the gap width that is formed.
It is using above-mentioned further beneficial effect：The average pore size of the porous foam metal layer is 0.2~5mm, hole
Gap rate is 70%~80%, and thickness is that 1~5mm can meet the liquid state phase change material when pan middle and lower part cavity bottom in heating
During to its phase transition temperature, it is changed into gas and quick to vacuum chamber top (condensation end) transmission, gaseous state phase-change working substance was being transmitted
Heat is quickly transferred to internal layer pot in journey, itself cooled liquefaction, and then turn again under capillary action along liquid sucting core structure
Move to the vacuum chamber of pot bottom wall.Quickly occur the circulation change of " liquid → gaseous state → liquid " in phase-change working substance, and along with
The quick conduction of heat, you can realize that pot of the heat in pot especially food cooking part is quickly conducted, and the second pot
The heat conduction of side wall is slower, caused by can effectively preventing excessive heat by the conduction without food cooking section at the top of pot
Thermal loss, finally realizes that the diverse location of first pot of body sidewall possesses good uniformity of temperature profile in whole heating process
Property, temperature difference everywhere can be met within ± 3 DEG C so that its middle and lower part food realizes that good physics is non-sticky in heating process
Effect.
A kind of the utility model samming pan of pot bottom containing vacuum chamber as described above, further, the second pot side
The height of wall be below 10mm, or the vacuum chamber top be located at pot body sidewall maximum stage line ± 5mm position.
That is the upper end of first pot of body sidewall is located at more than the peak level graduation mark of pot (or defined food highest cooking
More than position or left and right).
Beneficial effect using above-mentioned further scheme is：Liquid phase-change working medium in vacuum chamber in pot bottom wall is adding
Rapid phase transition heat transfer in thermal process, second pot of body sidewall heat transfer is slower, can effectively prevent excessive heat from being scattered and disappeared at the top of pot, most
Heating food area on the inside of samming pan can be met eventually possesses good temperature homogeneity, its temperature difference≤± 3 DEG C everywhere, thus pot
Interior food realizes the non-sticky effect of good physics in heating process, and improves the heating efficiency (about >=10%) of pot.
Brief description of the drawings
Fig. 1 is a kind of samming pan diagrammatic cross-section of the pot bottom of the utility model containing vacuum chamber；
Fig. 2 is the structural representation in Figure 1A-A directions.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, pot bottom wall, 2, first pot of body sidewall, 3, second pot of body sidewall, 4, inner casing, 5, shell, 6, porous foam metal
Bar, 7, liquid phase-change working medium, 8, hollow pipe, 9, vacuum chamber.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit scope of the present utility model.
As shown in figure 1, according to a kind of samming pan of the pot bottom of the utility model embodiment containing vacuum chamber, including pot bottom
Wall 1 and the pot body sidewall for being connected to the week side of boss of pot bottom wall four, the pot body sidewall include first pot of body sidewall 2 and with it is described
There is phase in second pot of body sidewall 3 of the first pot of upper end of body sidewall 2 connection, first pot of body sidewall 2 and the pot bottom wall 1
Have to be heated in vacuum chamber 9 in intercommunicated vacuum chamber 9, the pot bottom wall 1 and gaseous liquid phase can be converted into from liquid
Becoming in working medium 7, the vacuum chamber of first pot of body sidewall 2 has liquid-sucking core.Specifically, the pot bottom wall, the first pot side
Wall and second pot of body sidewall are made into integration.
In certain embodiments, first pot of body sidewall 3 and the pot bottom wall 1 include inner casing 4 and shell
5, inner casing 4 and shell 5 shape is mutually corresponded to, and is the vacuum chamber between the inner casing 4 and shell 5；Second pot
The lower end of side wall 3 is fixed and sealing welding or integrally connected with the inner casing 4 of first pot of body sidewall 2 and the upper end of shell 5.
In a specific example, the pot bottom wall 1, first pot of body sidewall 2 and second pot of body sidewall 3 include interior
Shell 4 and shell 5, the inner casing 4 of second pot of body sidewall 3 and shell 5 is compressed together is brought into close contact.In another specific example
In, the pot bottom wall 1 and first pot of body sidewall 2 include top concordant inner casing 4 and shell 5, second pot of body sidewall 3
Upwardly extend and to be formed for the inner casing 4 of first pot of body sidewall 1, the upper end of the shell 5 of first pot of body sidewall 2 with described second pot
The lower end of body sidewall 3 is sealedly and fixedly connected, or second pot of body sidewall 3 upwardly extends to be formed for the shell of first pot of body sidewall 2, institute
The inner casing upper end and the lower end of second pot of body sidewall 3 for stating first pot of body sidewall 2 are sealedly and fixedly connected.Specifically, described
The top of shell 5 of one pot of body sidewall 2 is communicated with the hollow pipe of the vacuum chamber, and above-mentioned hollow pipe 8 can be metal tube,
It can be the pipeline that other exotic materials are made.By bottom injection liquid phase-change working medium from the hollow pipe to vacuum chamber,
And the air of vacuum heat-conduction intracavitary is excluded, heat conduction vacuum heat-conduction intracavitary is kept vacuum state.
In a specific example, the liquid-sucking core is more than two porous foam metal bars 6, the porous foam metal
Bar 6 is connected the outside of inner casing 4 with first pot of shape adaptation of body sidewall 2 and its both sides and the inner side of the shell 5 is (described more
The thickness of hole foam metal bar is adapted with the width of the vacuum chamber), it is the vacuum between the porous foam metal bar
Chamber.In such scheme, it is preferable that the porous foam metal bar can be porous foam copper bar, porous foam aluminum strip or many
Hole foam nickel bar.Preferably, the width of porous foam metal bar is that the spacing between 5~15 millimeters, porous foam metal bar is 3
~10 millimeters.
In another specific example, the liquid-sucking core is porous foam metal layer, and the porous foam metal layer is set
On the outside of the inner casing of first pot of body sidewall or on the inside of shell.In such scheme, it is preferable that the porous foam metal
The average pore size of layer is 0.2~5mm, and porosity is 70%~80%, and thickness is 1~5mm, and the width of the vacuum chamber is more than
The thickness of the porous foam metal layer, its scope can be selected as 1.5mm~6mm.The width of above-mentioned vacuum chamber is institute
State the gap width formed between the outside wall surface of pot inner casing and the internal face of the pot shell.
According to the utility model embodiment specifically, the height of second pot of body sidewall is below 10mm, or it is described
The top of vacuum chamber is located at the maximum stage line ± 5mm of pot body sidewall position.That is first pot of body sidewall is upper
End more than the peak level graduation mark of pot (or more than defined food highest cooking position or left and right).In pot bottom wall
Vacuum chamber in rapid phase transition heat transfer of the liquid phase-change working medium in heating process, the heat transfer of second pot of body sidewall is slower, can have
Effect prevents excessive heat from being scattered and disappeared at the top of pot, and can finally meeting heating food area on the inside of samming pan, to possess good temperature equal
Even property, its temperature difference≤± 3 DEG C, thus food realizes the non-sticky effect of good physics in heating process in pot everywhere, and improve
The heating efficiency (about >=10%) of pot.
Embodiment 1
A kind of samming pan of pot bottom containing vacuum chamber, including pot bottom wall 1 and it is connected to the week side of boss of pot bottom wall four
Pot body sidewall, the pot body sidewall includes first pot of body sidewall 2 and be connected with first pot of body sidewall 2 upper end second pot
There is interconnected vacuum chamber, the pot bottom wall 1 in body sidewall 3, first pot of body sidewall 2 and the pot bottom wall 1
Having in interior vacuum chamber in liquid phase-change working medium, the vacuum chamber of first pot of body sidewall 2 has liquid-sucking core；The pot bottom
Wall 1, first pot of body sidewall 2 and second pot of body sidewall 3 include inner casing 4 and shell 5, the He of inner casing 4 of second pot of body sidewall 3
Shell 5 is compressed together to be brought into close contact；The liquid-sucking core is 8-12 bar porous foam metals bar 6, the porous foam metal bar 6
The outside of inner casing 4 and the inner side of the shell 5 are connected with first pot of shape adaptation of body sidewall 2 and its both sides, it is described porous
The average pore size of foam metal bar is 2mm, and porosity is 75%, and thickness is 2mm.The height of second pot of body sidewall is set
For 3,5,7,10mm, influence of the second pot Sidewall Height of test to heat efficiency；Comparative example 1 and difference be to be not present the
Two pots of body sidewalls.I.e. using the electromagnetic oven heating embodiment 1 and isodose in the identical pan volume of comparative example 1 of equal-wattage
Time evaluation required for water, concrete outcome is shown in Table 1.Electromagnetic oven power 2.1kw, 4 liters of water.
Influence of the height of 1. second pots of body sidewalls of table to heat efficiency
| Experiment numbers | The height of second pot of body sidewall | It is heated to boiling time |
| Comparative example 1 | 0mm | 15min |
| Embodiment 1 | 3mm | 14.8min |
| Embodiment 2 | 5mm | 14.2min |
| Embodiment 3 | 7mm | 13.7min |
| Embodiment 4 | 10mm | 13.5min |
Table 1 can be seen that samming pan of the utility model pot bottom containing vacuum chamber is provided with second pot of body sidewall, can expire
Sufficient samming pot internal layer pot cooking food area possesses good temperature homogeneity, its temperature difference≤± 3 DEG C everywhere, thus food in pot
The non-sticky effect of good physics is realized in heating process, and improves the heating efficiency (about >=10%) of pot.
In description of the present utility model, it is to be understood that term " " center ", " length ", " width ", " thickness ",
" on ", " under ", " orientation or position relationship of the instruction such as " top ", " bottom " " interior ", " outer ", " axial direction ", " radial direction ", " circumference " are base
In orientation shown in the drawings or position relationship, be for only for ease of description the utility model and simplify describe, rather than indicate or
Specific orientation must be had, with specific azimuth configuration and operation by implying the device or element of meaning, therefore it is not intended that
To limitation of the present utility model.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two
It is individual, three etc., unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally.For this
For the those of ordinary skill in field, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification can be entered
Row is combined and combined.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (11)
1. a kind of samming pan of pot bottom containing vacuum chamber, including pot bottom wall and the pot for being connected to the week side of boss of pot bottom wall four
Body sidewall, it is characterised in that the pot body sidewall includes first pot of body sidewall and is connected with the first pot sidewall upper
There is interconnected vacuum chamber, the pot bottom in second pot of body sidewall, first pot of body sidewall and the pot bottom wall
Have to be heated in vacuum chamber in wall and gaseous liquid phase-change working medium, the vacuum of first pot of body sidewall can be converted into from liquid
Intracavitary has liquid-sucking core.
2. a kind of samming pan of pot bottom containing vacuum chamber according to claim 1, it is characterised in that the first pot side
Wall and the pot bottom wall include inner casing and shell, the inner casing is corresponding with shell shape to be mutually adapted, the inner casing and outside
It is the vacuum chamber between shell；Inner casing and the upper end of shell of the lower end of second pot of body sidewall with first pot of body sidewall
Sealing welding or integrally connected.
3. samming pan of a kind of pot bottom containing vacuum chamber according to claim 1, it is characterised in that the pot bottom wall,
First pot of body sidewall and second pot of body sidewall include the inner casing and shell that shape correspondence is mutually adapted, second pot of body sidewall
Inner casing and shell is compressed together is brought into close contact.
4. samming pan of a kind of pot bottom containing vacuum chamber according to claim 1, it is characterised in that the pot bottom wall and
First pot of body sidewall includes the inner casing and shell that shape correspondence is mutually adapted, and second pot of body sidewall is first pot of body sidewall
Inner casing upwardly extend to be formed, the lower end sealing of the shell upper end of first pot of body sidewall and second pot of body sidewall is fixed
Connection, or second pot of body sidewall upwardly extend to be formed for the shell of first pot of body sidewall, on the inner casing of first pot of body sidewall
The lower end with second pot of body sidewall is held to be sealedly and fixedly connected.
5. according to a kind of samming pan of any one of Claims 1-4 pot bottom containing vacuum chamber, it is characterised in that described
Pot bottom wall, first pot of body sidewall and second pot of body sidewall are made into integration.
6. according to a kind of any one of claim 2 to the 4 samming pan of bottom containing vacuum chamber, it is characterised in that described the
The shell upper of one pot of body sidewall is communicated with the hollow pipe of the vacuum chamber.
7. according to a kind of any one of claim 2 to the 4 samming pan of bottom containing vacuum chamber, it is characterised in that the suction
Wick-containing is more than two porous foam metal bars, and the porous foam metal bar is adapted to and it with the first pot sidewall shape
Both sides are connected on the outside of the inner casing and on the inside of the shell, are the vacuum chamber between the porous foam metal bar.
8. according to a kind of any one of claim 2 to the 4 samming pan of bottom containing vacuum chamber, it is characterised in that the suction
Wick-containing is porous foam metal layer, and the porous foam metal layer is arranged on the outside of the inner casing of first pot of body sidewall or outer
On the inside of shell.
9. a kind of samming pan of bottom containing vacuum chamber according to claim 8, it is characterised in that the porous foam metal
The average pore size of layer is 0.2~10mm, and porosity is 70%~80%, and thickness is 1~5mm, and the width of the vacuum chamber is more than
The thickness of the porous foam metal layer.
10. according to a kind of samming pan of any one of Claims 1-4 bottom containing vacuum chamber, it is characterised in that described
The height of two pots of body sidewalls be below 10mm, or the vacuum chamber top be located at the pot body sidewall maximum stage line ±
5mm position.
11. according to a kind of samming pan of any one of Claims 1-4 bottom containing vacuum chamber, it is characterised in that the suction
Wick-containing is foam copper, foamed aluminium or nickel foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621307807.0U CN206543123U (en) | 2016-11-30 | 2016-11-30 | A kind of samming pan of pot bottom containing vacuum chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621307807.0U CN206543123U (en) | 2016-11-30 | 2016-11-30 | A kind of samming pan of pot bottom containing vacuum chamber |
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| Publication Number | Publication Date |
|---|---|
| CN206543123U true CN206543123U (en) | 2017-10-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108113456A (en) * | 2016-11-30 | 2018-06-05 | 佛山市顺德区美的电热电器制造有限公司 | A kind of samming cookware of pot bottom containing vacuum chamber |
-
2016
- 2016-11-30 CN CN201621307807.0U patent/CN206543123U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108113456A (en) * | 2016-11-30 | 2018-06-05 | 佛山市顺德区美的电热电器制造有限公司 | A kind of samming cookware of pot bottom containing vacuum chamber |
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