CN108402881B - Enamel iron pot with handle and electric heating pot - Google Patents

Enamel iron pot with handle and electric heating pot Download PDF

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Publication number
CN108402881B
CN108402881B CN201810132832.7A CN201810132832A CN108402881B CN 108402881 B CN108402881 B CN 108402881B CN 201810132832 A CN201810132832 A CN 201810132832A CN 108402881 B CN108402881 B CN 108402881B
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China
Prior art keywords
handle
pan
enamel
pot
flange
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Active
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CN201810132832.7A
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Chinese (zh)
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CN108402881A (en
Inventor
朱泽春
王昌明
郭小玉
赖七生
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Joyoung Co Ltd
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Joyoung Co Ltd
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Publication date
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Priority to CN201810132832.7A priority Critical patent/CN108402881B/en
Publication of CN108402881A publication Critical patent/CN108402881A/en
Priority to PCT/CN2019/073307 priority patent/WO2019154141A1/en
Priority to TW108103821A priority patent/TW201934060A/en
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Publication of CN108402881B publication Critical patent/CN108402881B/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/002Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/004Cooking-vessels with integral electrical heating means
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00Parts, details or accessories of cooking-vessels
    • A47J36/02Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00Parts, details or accessories of cooking-vessels
    • A47J36/02Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A47J36/025Vessels with non-stick features, e.g. coatings
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J45/00Devices for fastening or gripping kitchen utensils or crockery
    • A47J45/06Handles for hollow-ware articles

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Cookers (AREA)

Abstract

The invention relates to an enamel iron pan with a handle, wherein an installation part facing to the bottom is arranged on the lower side of a flange, the handle comprises an attachment surface attached to the outer surface of a pan body and a fastening part matched with the installation part, the fastening part is fixed on the installation part so as to fix the handle and the lower side of the flange, and the attachment surface tightly presses an enamel layer protecting the periphery of the installation part. So, when the handle was installed on the installation department, the enamel layer of installation department periphery can be protected, the damaged condition can not appear to turn-ups itself has the water guide effect, and the installation department towards the bottom is located its downside, can better avoid water to get into the installation department to prevent the corrosion problem of installation department.

Description

Enamel iron pot with handle and electric heating pot
Technical Field
The invention relates to the field of kitchen appliances, in particular to an enamel iron pan with a handle and an electric food warmer.
Background
Small kitchen appliances such as electric cookers, electric pressure cookers, electric stewpots and the like become necessary products at home due to convenient use. In the small kitchen appliances, the effect of cooking food by the small kitchen appliance is determined by the quality of the pot in direct contact with the food, so that the inner container pot with the structure similar to a ball kettle, a feather kettle and the like appears in the industry to improve the circulation of the food cooking process.
An enamel pot appears in the industry, enamel is arranged on the outer surface of the enamel pot, and the attractiveness of a pot product is greatly improved. However, the enamel pot cannot be used on an electric heating pot because the outer surface of the enamel pot is provided with thicker enamel, and particularly when the enamel pot is used as an inner container of the electric heating pot, the enamel is damaged due to the installation of a handle holding the inner container.
Disclosure of Invention
In order to solve the problems, the invention provides an enamel iron pan and an electric heating pan which have good appearance and are provided with end holding handles.
The invention adopts the following technical scheme:
the utility model provides a take enamel iron pan of handle, includes the pot body, the pot mouth and the handle of holding the pot body of iron substrate, and the surface of the pot body is equipped with enamel layer, and the pot mouth is equipped with the turn-ups, turn down rims downside is equipped with the installation department towards the bottom, and the handle is including the binding face of the external surface of laminating pot to and with installation department complex fastening portion, fastening portion fixes on the installation department in order to fix handle and turn down rims downside, and binding face compresses tightly the enamel layer of protection installation department periphery.
The installation department is welding or integrative casting formation 1 at least erection column in turn-ups downside, is equipped with the screw on the erection column.
The installation department is the boss of integrative casting formation in turn-ups downside, and boss middle part or both ends are equipped with the screw.
The outside portion of installation department all is equipped with the enamel layer with the turn-ups downside.
The fastening portion comprises an inner boss, the inner boss is provided with a mounting hole matched with the screw hole, and the top surface of the boss is provided with a water guide notch facing the side wall of the pot body.
The binding face comprises an upper binding face, a lower binding face and a side binding face, and the lower binding face is provided with a drainage notch.
The lower attaching surface is provided with a hard force releasing notch at the fastening part.
The handle also comprises an end holding part matched with the flange, and the length of the end holding part extending towards the outer side of the pot body is at least 1/3 of the width of the flange.
An inner concave part is connected below the end holding part, the binding surface comprises a lower binding surface, and the lower binding surface is arranged on the inner side of the inner concave part.
An electric pan comprises an outer pan body, a pan cover and an inner container arranged in the outer pan body, wherein the inner container is the enamel iron pan with the handle, and the outer pan body is provided with a groove or a notch avoiding the handle.
The invention has the beneficial effects that:
the invention relates to an enamel iron pan with a handle, wherein an installation part facing to the bottom is arranged on the lower side of a flange, the handle comprises an attachment surface attached to the outer surface of a pan body and a fastening part matched with the installation part, the fastening part is fixed on the installation part so as to fix the handle and the lower side of the flange, and the attachment surface tightly presses an enamel layer on the periphery of the installation part. So, when the handle was installed on the installation department, the enamel layer of installation department periphery can be protected, the damaged condition can not appear to turn-ups itself has the water guide effect, and the installation department towards the bottom is located its downside, can better avoid water to get into the installation department to prevent the corrosion problem of installation department.
Preferably, the mounting part is at least 1 mounting column welded or integrally cast on the lower side of the flanging, and the mounting column is provided with a screw hole facing to the bottom. Adopt the welding, the solder joint is located the turn-ups downside, and water-proof effects is good. And the screw hole on the mounting column faces the bottom of the pot, so that water can be prevented from entering the screw hole, and the rust-proof effect is good. In the same way, the mounting part is integrally cast to form a boss on the lower side of the flanging, and the middle part or two ends of the boss are provided with screw holes facing the bottom.
Preferably, the outer side part of the mounting part and the lower side of the flanging are both provided with enamel layers. So as to better protect the installation part and prevent the installation part from rusting.
Preferably, the fastening part comprises an inner boss, the inner boss is provided with a mounting hole matched with the screw hole, and the top surface of the boss is provided with a water guide notch facing the side wall of the pot body. Thus, water is prevented from entering the screw hole.
Preferably, the bonding surface comprises a lower bonding surface, a lower bonding surface and a side bonding surface, and the lower bonding surface is provided with a drainage notch. Can in time discharge water, avoid water to remain and cause the corrosion risk.
Preferably, the lower attaching surface is provided with a hard force releasing notch at the fastening part. In order to guarantee the installation effect, damage risk when avoiding the handle fixed.
Preferably, the handle also comprises an end holding part matched with the flange, and the length of the end holding part extending towards the outer side of the pot body is at least 1/3 of the width of the flange. So as to be convenient for holding and more stable.
Preferably, an inner concave portion is connected to the lower portion of the end holding portion, the attachment surface includes an upper attachment surface, and the lower attachment surface is disposed inside the inner concave portion. The inward concave part can widen the holding width of the holding part, and the lower attaching surface compresses the enamel protection.
In addition, the electric cooker comprises an outer cooker body, a cooker cover and an inner container placed in the outer cooker body, wherein the inner container is the enamel iron cooker with the handle, and the outer cooker body is provided with a groove or a notch avoiding the handle. Therefore, the appearance of the inner container used as the electric food warmer is improved, and the application of the holding handle on the enamel iron inner container is realized.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of a first embodiment of an enamel iron pan with a handle according to the present invention;
FIG. 2 is an exploded view of the handle portion of FIG. 1;
FIG. 3a is a schematic view of one configuration of the handle of FIG. 1;
FIG. 3b is another schematic structural view of the handle of FIG. 1;
FIG. 4 is a schematic structural view of a second embodiment of an enamel iron pan with a handle according to the present invention;
FIG. 5 is a schematic structural view of a third embodiment of an enamel iron pan with a handle according to the present invention;
FIG. 6 is a schematic structural diagram of an electric cooker according to an embodiment of the present invention;
fig. 7 is a partially enlarged view of fig. 6.
Detailed Description
The enamel iron pan with the handle comprises a pan body made of an iron base material, a pan opening and the handle for holding the pan body, wherein an enamel layer is arranged on the outer surface of the pan body, a flanging is arranged on the pan opening, an installation part facing to the bottom is arranged on the lower side of the flanging, the handle comprises an attachment surface attached to the outer surface of the pan body, and a fastening part matched with the installation part, the fastening part is fixed on the installation part so as to fix the handle and the lower side of the flanging, and the attachment surface tightly presses the enamel layer for protecting the periphery of the installation part. Therefore, by adopting the structure of the invention, the handle structure can be arranged at the pot mouth of the enamel iron pot, thereby improving the application scene of the enamel iron pot, in particular the enamel iron pot.
The first embodiment is as follows:
referring to fig. 1, fig. 2, fig. 3a and fig. 3b, the enamel iron pan with a handle according to the present invention includes a pan body 1 made of an iron substrate, a pan opening 2, and a handle 3 for holding the pan body, an enamel layer 11 is disposed on an outer surface of the pan body 1, the pan opening 2 is provided with a flange 21, an installation portion 22 facing a bottom is disposed on a lower side of the flange 21, the handle 3 includes an attachment surface 31 attached to the outer surface of the pan body, and a fastening portion 32 engaged with the installation portion, the fastening portion 32 is fixed on the installation portion 22 to fix the handle 3 to a lower side of the flange 21, and the attachment surface 31 presses the enamel layer 11 protecting an outer periphery of the installation portion 22.
The enamel layer is preferably enamel which is arranged on the outer surface of the iron pan body, so that the iron pan has a good appearance effect.
In this embodiment, the iron-based pan body 1 refers to a pan body formed by casting iron. The flanging 21 of the pan opening 2 is formed by integral casting. The inner surface of the turned-over edge 21 connected with the pan body 1 is a smooth transition cambered surface.
As a preferred embodiment, the lower side of the flange 21 is provided with a mounting part 22 facing to the bottom, the mounting part 22 is integrally cast, the upper end of the mounting part is connected with the lower side of the flange 21, the side part is connected with the outer surface of the pot body 1, and the mounting part 22 and the lower side of the flange are covered by the enamel layer. Thus, the firmness of the mounting portion 22 is ensured, and the risk of breakage is avoided. In addition, the connection method is not easy to damage the enamel layer on the surface of the mounting portion 22. Of course, in addition to the preferred embodiments described in this embodiment, the mounting portion 22 may be integrally cast on the underside of the flange, welded to the underside of the flange, or both cast and welded, with these connections being cast as preferred. Furthermore, the mounting portion 22 is 2 mounting posts integrally cast on the lower side of the flange, and the mounting posts are provided with screw holes facing the bottom. The mounting posts may also be boss shaped or cylindrical in shape. Of course, it can be a mounting column, and as a preferred embodiment, 2 mounting columns are adopted to ensure the stability of the handle installation.
As a preferred embodiment, the height of the mounting column in the invention is 0.5-1.5 cm, the wall thickness of the mounting column is 1.5-5 mm, the width of the mounting column is 0.5-1.5 cm, and the outer side of the mounting column is positioned in the outer edge of the flanging. The mounting column with the structural design can improve the fastening performance of the mounting column, and can avoid the associated effect caused by damage of the local enamel layer on the mounting column, so that the enamel layer on the mounting column is damaged at the minimum during assembly. Moreover, the assembly is optimized, and the positioning is simple.
As a preferred embodiment of the present invention, the attaching surface 31 includes an upper attaching surface 311, a lower attaching surface 312, and a side attaching surface 313 to form a press protection surrounding the mounting portion.
In a preferred embodiment, the fastening portion 32 includes a mounting hole and a screw, when the screw is fastened in the screw hole of the mounting portion 22 through the mounting hole, a crack may be generated when the enamel layer at the top end of the mounting column is pressed, the crack is protected by the attachment surface 31 and does not directly fall off or expand to the outer surface of the pot body, and friction is increased to achieve better fastening. And, because the installation department is towards the bottom, the screw on it also is towards the bottom, even the enamel layer on installation post top produced the crackle, exposes the iron substrate material, also can not be easy to contact water, avoids the risk of rust on it.
As the preferred embodiment of the invention, the handle 3 also comprises an end holding part 33 matched with the flange, and the length of the end holding part 33 extending towards the outside of the pan body is at least 1/3 of the width of the flange. Preferably, the length of the end-holding part 33 extending to the outside of the pot body is not more than 2 times of the width of the flange, so as to avoid the phenomenon that the width is too large, causing incompatibility and affecting the use of the end-holding part on other small kitchen appliances. The end holding part 33 is matched with the flange and comprises a protection part 331 extending towards the side part of the flange and an end holding arm 332 extending towards the outer side, and the lower side of the end holding arm 332 is provided with an anti-slip rib 333 or a protrusion. The height of the protection portion 331 is not higher than the upper surface of the flange to be attached to the side portion of the flange to protect the enamel layer of the side portion of the flange. Further, an internal recess 334 is connected below the end support to expand the width of the end support arms 332. The lower attaching surface 312 is arranged inside the inner concave portion 334, the side attaching surface 313 is required by the shape of the protection portion 331 to form a step shape so as to protect the outer surface of the pot body and the enamel layer at the lower side of the flanging, the upper attaching surface 311 is arranged above the inner concave portion 334, and the upper attaching surface, the lower attaching surface and the side attaching surface are all integrally formed. In order to strengthen the protection of the mounting column, the handle forms a protection cavity sleeved with the mounting column, the protection cavity consists of an inner concave part 334 and a side binding surface 313, the fastening part 32 is arranged at the bottom of the protection cavity, namely, the end part of the mounting column is butted against the bottom of the protection cavity, and after a screw is driven into the protection cavity, fastening assembly is formed.
In the invention, the handle 3 is made of plastic, and has a protection effect, so that a user is prevented from holding the handle to scald his hand. The handles are symmetrically arranged on the pot body 1 to form a pair, namely two mounting parts are arranged, and 4 mounting column positions are preferred.
It can be understood that the iron-based pan body can also be a forged iron pan or a stretched iron pan, the outer surface of the pan body is provided with an enamel layer, and the inner surface of the pan body is provided with a non-stick coating layer
It can be understood that the mounting portion is a boss integrally cast on the lower side of the flange, and a screw hole facing the bottom is formed in the middle or at two ends of the boss. Such simple variations of the mounting structure are also within the scope of the present invention.
According to the invention, the installation part is arranged at the lower side of the turned edge, the assembly is realized through the fastening part on the handle, and the protection is realized through the binding surface on the handle, so that the holding handle can be arranged on the enamel iron pan, particularly the enamel iron pan of the hair salon, the effect of preventing scald by holding can be realized, even if enamel is locally damaged in the installation process, the expansion of an enamel layer can be effectively prevented, and the product quality is improved.
Example two:
referring to fig. 4, a second embodiment of an enamel iron pan with a handle according to the present invention is different from the first embodiment in that: the fastening portion 32 includes an inner boss 321, and a mounting hole 322 matched with the screw hole is formed in the inner boss. That is, the inner boss 321 is formed in the protection cavity, the mounting hole 322 is at the top of the boss 321, and the top of the boss 321 abuts against the mounting portion 22.
Furthermore, in order to avoid the risk of rust on the mounting portion 22, especially in the screw hole thereof, caused by water accumulation between the boss 321 and the mounting portion 22, the top surface of the boss is provided with a water guiding notch 323 facing the sidewall of the pot body to guide water to the complete part of the enamel layer on the sidewall of the pot body. And the design of this breach has still promoted the assembly effect between boss 321 and the installation department 22, even the enamel around the mounting department 22 screw hole damages, the water guide breach provides the release space, has guaranteed the locking force.
As a preferred embodiment, in order to further prevent water from entering the handle and prevent the risk of rusting of the screw hole in the mounting portion 22, a drainage notch 314 is provided on the lower abutting surface 312, the drainage notch 314 is provided in the middle of the lower abutting surface 312, and further, a lower portion of the inner concave portion 334 may be provided.
This embodiment has promoted the assembly fastening degree through setting up boss 321 to avoid the rusty risk of installation department 22 through water guide breach 323, through setting up drainage breach 314, avoid water to remain in the handle.
Other structures and advantages of the embodiment are consistent with the embodiment, and are not described herein again.
Example three:
referring to fig. 5, a second embodiment of an enamel iron pan with a handle according to the present invention is different from the first and second embodiments in that: the lower attaching surface 312 is provided with a hard force releasing notch 324 at the fastening portion 32. So as to avoid the risk of crack damage of the handle caused by hard force in the installation process.
Further, the end surface of the hard force relief notch 324 forms a portion of the lower engaging surface 312.
Further, the top end of the hard force release notch 324 encloses a portion of the mounting hole.
The present embodiment effectively releases the hard force of the screw fixation by providing the hard force release notch 324, avoiding the risk of damage.
Other structures and beneficial effects of this embodiment are the same as those of the first and second embodiments, and are not described herein again.
Example four:
referring to fig. 6 and 7, two embodiments of an electric pan according to the present invention include an outer pan body, a pan cover, and an inner container disposed in the outer pan body, wherein the inner container is an enamel iron pan with a handle in the above embodiments, and the outer pan body is provided with an avoiding groove or an avoiding notch for avoiding the handle.
Referring specifically to fig. 6, the outer side of the outer pot body also has a notch 400, which is communicated with the avoidance groove or the avoidance notch to accommodate the handle of the enamel iron pot.
In another embodiment, please refer to fig. 7, the avoiding groove or the avoiding notch is formed inside the outer pot body, and the outer side of the outer pot body is provided with a pot cover or the outer side of the outer pot body is sealed to form a complete appearance.
In the invention, the enamel iron pan is applied to the electric pan, and the handle can effectively protect the risk of rust on the mounting part 22 even if condensed water exists when the pan cover is opened or under the kitchen environment through the fixed structure design of the handle. Moreover, the risk that the enamel layer is damaged in a large area due to the installation of the handle can be effectively avoided, the attractiveness of the inner container is greatly improved, and the application scene of the enamel iron pan is improved.
While the invention has been described with reference to certain embodiments, it will be understood by those skilled in the art that the foregoing and other changes in forms and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (10)

1. The utility model provides a take enamel iron pan of handle, includes the pot body, the pot mouth and the handle of holding the pot body of iron substrate, and the surface of the pot body is equipped with enamel layer, and the pot mouth is equipped with the turn-ups, its characterized in that, the turn-ups downside is equipped with the installation department towards the bottom, and the handle is including the binding face of the external surface of laminating pot to and with installation department complex fastening portion, fastening portion fix on the installation department in order to be fixed handle and turn-ups downside, and the binding face compresses tightly the enamel layer of protection installation department periphery, the integrative casting of installation department forms at the turn-ups downside, perhaps welds at the turn-ups downside, perhaps casting and welding all have.
2. The enameled iron pan with handle as claimed in claim 1, wherein the mounting portion is at least 1 mounting post welded or integrally cast on the underside of the flange, the mounting post having a threaded hole facing the bottom.
3. The enameled iron pan with handle as claimed in claim 1, wherein the mounting portion is a boss integrally formed on the underside of the flange by casting, and a screw hole is formed in the middle or both ends of the boss toward the bottom.
4. The enameled iron pan with handle as claimed in claim 1, wherein the outer side portion of the mounting portion and the underside of the flange are provided with enamel layers.
5. The enameled iron pan with handle as claimed in claim 4, wherein the fastening portion comprises an inner boss, the inner boss is provided with a mounting hole matching with the screw hole, and the top surface of the boss is provided with a water guiding notch facing the side wall of the pan body.
6. The enameled iron pan with handle as claimed in claim 4, wherein the abutting surface comprises an upper abutting surface, a lower abutting surface and side abutting surfaces, and the lower abutting surface is provided with a drainage notch.
7. The enameled iron pan with handle as claimed in claim 6, wherein the lower attaching surface is provided with a hard force releasing notch at the fastening portion.
8. The enameled iron pan with handle as claimed in any one of claims 1 to 7, wherein the handle further comprises an end holding part matching with the flange, and the end holding part extends towards the outside of the pan body for at least 1/3 of the width of the flange.
9. The enameled iron pan with handle as claimed in claim 8, wherein an inner concave portion is connected to the lower end of the holding portion, and the engaging surface includes a lower engaging surface disposed inside the inner concave portion.
10. An electric pan, comprising an outer pan body, a pan cover and an inner container arranged in the outer pan body, characterized in that the inner container is the enamel iron pan with a handle in any one of claims 1 to 9, and the outer pan body is provided with an avoiding groove or an avoiding notch for avoiding the handle.
CN201810132832.7A 2018-02-09 2018-02-09 Enamel iron pot with handle and electric heating pot Active CN108402881B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201810132832.7A CN108402881B (en) 2018-02-09 2018-02-09 Enamel iron pot with handle and electric heating pot
PCT/CN2019/073307 WO2019154141A1 (en) 2018-02-09 2019-01-28 Enamel liner for use in cooking appliance and cooking appliance
TW108103821A TW201934060A (en) 2018-02-09 2019-01-31 Enamel liner for cooking utensil and cooking utensil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810132832.7A CN108402881B (en) 2018-02-09 2018-02-09 Enamel iron pot with handle and electric heating pot

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CN108402881A CN108402881A (en) 2018-08-17
CN108402881B true CN108402881B (en) 2020-11-24

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019154141A1 (en) * 2018-02-09 2019-08-15 九阳股份有限公司 Enamel liner for use in cooking appliance and cooking appliance

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CN205649384U (en) * 2016-03-16 2016-10-19 九阳股份有限公司 Inner pan of an electric -heat pan
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Publication number Priority date Publication date Assignee Title
CN103169372A (en) * 2011-12-26 2013-06-26 张毅蔚 Seal structure of electric kettle
CN205144282U (en) * 2015-10-27 2016-04-13 应洪亮 Steel porcelain pot
CN105668459A (en) * 2016-03-29 2016-06-15 中车青岛四方机车车辆股份有限公司 Vehicle lifting pin base of railway vehicle and using method for vehicle lifting pin base

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