CN203399321U - Columnar thick-film liquid heater - Google Patents
Columnar thick-film liquid heater Download PDFInfo
- Publication number
- CN203399321U CN203399321U CN201320427450.XU CN201320427450U CN203399321U CN 203399321 U CN203399321 U CN 203399321U CN 201320427450 U CN201320427450 U CN 201320427450U CN 203399321 U CN203399321 U CN 203399321U
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- China
- Prior art keywords
- thick film
- basal body
- hot basal
- connecting portion
- column
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- Expired - Lifetime
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Abstract
The utility model relates to a columnar thick-film liquid heater. The columnar thick-film liquid heater comprises a heating substrate and thick-film circuits disposed on one surface of the heating substrate. External contacts are disposed on each thick-film circuit. The surface, where the thick-film circuits are disposed, of the heating substrate is sealed with a seal column. The heating substrate and the seal column are hollow column-shaped bodies. The thick-film circuits are disposed on an inner surface or an outer surface of the heating substrate. The heating substrate and the seal column are connected in a sealing and sleeved manner. One end, where the external contacts are disposed, of the heating substrate is provided with a first connecting portion, one end, which is corresponding to the external contacts, of the seal column is provided with a second connecting portion, and the first connecting portion and the second connecting portion are used to be connected with a flange plate or a container housing. According to the columnar thick-film liquid heater, a flat-shaped heating substrate is configured to be three-dimensionally columnar, the thick-film circuits are printed on the outer surface or the inner surface of the columnar heating substrate, the heating substrate is sealed with the hollow columnar seal column, an inner surface and an outer surface of the columnar liquid heater are connected with a liquid to be heated, and a heat-exchanging area is effectively increased.
Description
Technical field
The utility model relates to fluid electric heating device technical field, relates in particular to a kind of column thick film liquid heater.
Background technology
Thick-film heating technology is to adopt thick film silk-screen printing technique on a substrate, successively on substrate, prints dielectric, heating resistor, conductor and insulating protective layer, the heater element forming through high temperature sintering.Thick film heat energy printing technology has the advantages that heat conductivility is good, area of dissipation is large and security performance is high, but, efficiency and performance for fluid heating also do not reach the designing requirement of fully effective utilization at present, on the other hand, the watt level of thick film circuit is subject to heating the restriction of matrix area and vessel space.
As being used in prior art, make the thick film liquid heater of water heater, its general two flat heating plate laminatings welded seal of adopting, this design, make on the one hand the heat exchange of two heating plates in heater be confined on two faces of heating plate, gapless laminating due to two heating plates, reduced the heat dispersion of heater, very easily caused heater internal temperature too high, made heater surfaces produce incrustation scale or cause heater texturing and burn.On the other hand, heater is because of the limitation of heating surface of the base body and volume, if the power that heater requires is larger, adds area and the also corresponding meeting increase of volume of hot basal body, is unfavorable for that heater is towards future development high-power, small size.
Utility model content
Technical problem to be solved in the utility model is to have that heating plate working temperature is high, radiating efficiency is low, heat efficiency utilance is low and plate shapedly add the problems referred to above that hot basal body is limited to vessel space for conventional heater, provide a kind of power large, add hot basal body take up room little, radiating efficiency is high, easy to assembly and be applicable to a kind of column thick film liquid heater of three-dimensional heating device.
For addressing the above problem, the technical solution of the utility model is:
A kind of column thick film liquid heater, comprise that one has adding hot basal body and being arranged on the thick film circuit adding in hot basal body one side of heat conductivility, thick film circuit is provided with for connecting the external contact of power supply, described adding in the one side that hot basal body is provided with thick film circuit, is sealed with sealing cylinder, add the column that hot basal body and sealing cylinder are hollow, thick film circuit is arranged on the inner surface or outer surface that adds hot basal body, adds hot basal body and connects in succession with sealing cylinder sealing shroud; Describedly add one end that hot basal body is provided with external contact and be provided with the first connecting portion, one end of the sealing relatively external contact of cylinder is provided with the second connecting portion, and the first connecting portion and the second connecting portion are for mounting flange or container casing.
Be compared to prior art, a kind of column thick film liquid heater of the present utility model is arranged to three-dimensional column by the flat hot basal body that adds, and add on the outer surface of hot basal body or inner surface and print thick film circuit in column, sealing cylinder heated sealed matrix by hollow columnar forms column heater, the outer surface of column heater all contacts with liquid to be heated with inner surface, effectively increased heat exchange area, therefore, this heating appliances has the feature that power is large, space hold rate is little; Simultaneously, add hot basal body and seal cylinder and by the first connecting portion and the second connecting portion, be directly connected on ring flange or container casing respectively, increased the tightness degree that heater is connected with container casing or ring flange, at utmost utilized the space of container casing inside.
Preferably, described in add hot basal body and be provided with many group thick film circuits, every group of thick film circuit all includes two external contacts, organizes thick film circuit more and is evenly distributed on the whole surface that adds hot basal body or on part surface.Draw by high temperature wire in container casing or ring flange the external contact of many group thick film circuits, on hot basal body, be provided with many group thick film circuits adding, be conducive to realize the independent control to every group of thick film circuit, the controllability of power while realizing heating, to adapt to user's difference needs.If many group thick film circuits are evenly distributed on the whole surface that adds hot basal body, heater is a uniform calandria; If many group thick film circuits are uniformly distributed on the part surface that adds hot basal body, on heater, be reserved with the heat conduction steel plate of not printing thick film circuit, on this heat conduction steel plate, can carry out other processing such as some perforates.
Preferably, described the first connecting portion is to add the bottom that hot basal body is provided with one end, external contact, and the first connecting portion is provided with the seal for heated sealed matrix bottom.The first connecting portion sealed bottom, forms the tubular of an end opening, has both guaranteed sealing effectiveness, has increased again heat exchange area, and the first connecting portion also can directly be connected with container casing or ring flange, realizes sealing effectiveness.
Preferably, described in, adding hot basal body, to be provided with one end of external contact exposed external in sealing column.
Preferably, the double sectioned column shape body that described sealing cylinder is different size, one end of the sealing relatively external contact of cylinder is provided with one week annular projection, the position of annular projection is relative with the position of external contact, the bottom of annular projection is the second connecting portion, the second connecting portion and ring flange or container casing seal welding.Annular projection is for the cabling of thick film circuit, add the cavity that is formed for cabling between hot basal body and sealing cylinder, realized from the outside external contact of directly processing heater of housing or ring flange, realized add the upper outside contact point welding of hot basal body wire operation after move.
Preferably, described the second connecting portion is the bottom of sealing one end, the relatively external contact of cylinder, the second connecting portion and ring flange or container casing seal welding.Above-mentioned connected mode makes to add that ring flange is stretched out in one end that hot basal body is provided with external contact or container casing is outside, and the wiring of being convenient to external contact is processed.
Preferably, on the bottom of one end, the relatively external contact of described sealing cylinder, welding or die casting have one week welding interface, and welding interface radially distributes, and described welding interface is the second connecting portion.By welding interface, weld, be conducive to improve the bonding strength of sealing cylinder and ring flange or container casing, the damage while avoiding welding, thick film circuit being caused.
Preferably, the cross section that adds hot basal body and sealing cylinder described in is circle or regular polygon.The cross sectional shape that adds hot basal body and sealing cylinder can be set as required, all to realize the main purpose that is utilized as of maximum area.
Preferably, described in add the inner surface that hot basal body is provided with one end, external contact and be provided with internal thread, described seal comprises sealing ring and thread plug, thread plug with add hot basal body and removably connect.Utilize thread plug and sealing ring to seal adding hot basal body bottom, make heater for convenience detach, clean.
Preferably, described thick film circuit is printed on the inner surface that adds hot basal body, and adding hot basal body, to be provided with one end of external contact exposed external in sealing column, and the bottom of sealing cylinder is provided with the seal for closed feed water heater bottom.Add the cavity that is formed for cabling between the lower end side of hot basal body and seal, realized from housing or the outside external contact of directly processing heater of ring flange, realized add the upper outside contact point welding of hot basal body wire operation after move.
Accompanying drawing explanation
Fig. 1 is the axle geodesic structure schematic diagram of a kind of column thick film of the utility model liquid heater embodiment mono-intermediate cam shape heater.
Fig. 2 is the sectional structure schematic diagram of a kind of column thick film of the utility model liquid heater embodiment mono-intermediate cam shape heater.
Fig. 3 is the axle geodesic structure schematic diagram of circular shape heater in a kind of column thick film of the utility model liquid heater embodiment mono-.
Fig. 4 is the section axle geodesic structure schematic diagram of a kind of column thick film of the utility model liquid heater embodiment bis-intermediate cam shape heaters.
Embodiment
Below in conjunction with drawings and Examples, further describe the utility model, but protection range of the present utility model is not limited to this.
Embodiment mono-:
With reference to Fig. 1-3, a kind of column thick film liquid heater of the present utility model comprises and adds hot basal body 1 and seal cylinder 3, the one side that adds hot basal body 1 is provided with many group thick film circuits 2, every group of thick film circuit 2 is provided with for connecting two external contacts 5 of power supply, thick film circuit 2 is arranged on the inner surface or outer surface that adds hot basal body 1, can set as required.If many group thick film circuits 2 are evenly distributed on the whole surface that adds hot basal body 1, heater is a uniform calandria; If many group thick film circuits 2 are uniformly distributed on the part surface that adds hot basal body 1, on heater, be reserved with the heat conduction steel plate of not printing thick film circuit, on this heat conduction steel plate, can carry out other processing such as some perforates, one of them side of column heater is heat conduction steel plate.Wherein, add hot basal body 1 and seal cylinder 3 and be stainless-steel sheet or the aluminium alloy plate with heat conductivility, add the column that hot basal body 1 and sealing cylinder 3 are hollow, sealing cylinder 3 with add hot basal body 1 socket, sealing cylinder 3 is socketed in and adds in the one side that hot basal body 1 is provided with thick film circuit.Add one end that hot basal body 1 is not provided with external contact 5 and be provided with the border for welded seal cylinder 3, this border is that thick film circuit 2 is adding position reserved on hot basal body 1, adding hot basal body 1 is tightly connected in welded top with sealing cylinder 3, add sealing means between hot basal body 1 and sealing cylinder 3 and can adopt welded seal, bolt seal etc., can be with reference to sealing means conventional in prior art.When adding hot basal body 1 and be tightly connected with sealing cylinder 3, need on sealing cylinder 3, be printed with insulating barrier, insulating barrier is that glass glaze is silica, be that insulating barrier is arranged on sealing cylinder 3 and adds on the sealing surface of hot basal body 1 sealing, simultaneously, also can sealing cylinder 3 insulating barrier on coated with thermally conductive layer of silica gel, thermal conductive silicon glue-line auxiliary heating matrix 1 Homogeneouslly-radiating.Described heater outer surface is coated with fluorine resin coating layer, and fluorine resin coating layer has feature high temperature resistant, anticorrosion, antiscale, the useful life that is conducive to improve heater.
Add one end that hot basal body 1 is provided with external contact 5 and be provided with the first connecting portion, the first connecting portion is to add the bottom section that hot basal body 1 is provided with 5 one end, external contact, the first connecting portion is provided with the seal for heated sealed matrix bottom, seal is for the bottom of heated sealed matrix 1, make to add the tubular structure that hot basal body 1 forms an end opening, realize and add the adequacy that hot basal body 1 contacts with liquid to be heated.Wherein, seal can or be tightly connected by alternate manner with the first connecting portion welding, also can directly be connected with ring flange 4 or container casing, to guarantee that water power is isolated into object.Between the first connecting portion and external contact 5, be provided with welding distance is installed, in order to guarantee the not soldered damage of thick film circuit 2.
One end of the sealing relatively external contact 5 of cylinder 3 is provided with the second connecting portion, the second connecting portion is directly with ring flange 4 or container casing seal welding or be connected by alternate manner, for describing in detail, in the utility model, to be connected to example with ring flange 4, describe, with the connected mode of container casing can be with reference to the connected mode with ring flange 4.
With reference to Fig. 1, the second connecting portion is the bottom section of sealing 5 one end, the relatively external contact of cylinder 3, adding hot basal body 1, to be provided with one end of external contact 5 exposed outside sealing cylinder 3, and extend to the outside of ring flange 4, heater can be arranged on container casing by ring flange 4, realize heater can be directly from outside external contact point 5 process, improved convenience.The object of not damaging for reaching thick film circuit 2 also can be welded on the bottom of sealing 5 one end, the relatively external contact of cylinder 3 or die casting has one week welding interface, and welding interface radially distributes, and usings welding interface as the second connecting portion.The cross section that adds hot basal body 1 and sealing cylinder 3 is triangle, and three that add hot basal body 1 arrange respectively one group of thick film circuit 2 in appearance, in order to realize independent control, realizes and customizes requirement.
With reference to Fig. 2, the cross section that adds hot basal body 1 and sealing cylinder 3 is also triangle, or is other regular polygon, forms triangular heat device or regular polygon heater.The double sectioned column shape body that described sealing cylinder 3 is different size, one end of the sealing relatively external contact 5 of cylinder 3 is provided with one week annular projection, the position of annular projection is relative with the position of external contact 5, and the bottom of annular projection is the second connecting portion, the second connecting portion and ring flange 4 seal weldings.The annular projection that adds hot basal body 1 and sealing cylinder 3 after being tightly connected forms a cavity, and in cavity, correspondence is provided with external contact 5.
With reference to Fig. 3, add the cross section of hot basal body 1 and sealing cylinder 3 for circular, add directly welded seal part of one end that hot basal body 1 is provided with external contact 5, also can be connected by thread plug, convenient clean dismounting, be provided with internal thread adding hot basal body 1 and be provided with on the inner surface of 5 one end, external contact, wherein, seal comprises sealing ring and thread plug, thread plug with add hot basal body 1 and removably connect, with this, realize sealing.Circular shape heater with connected mode ring flange also with reference to triangular heat device.
It is independent sealed on sealing cylinder that a kind of column thick film liquid heater of the present utility model adds hot basal body by column, utilize the increase of thermal conductive silicon glue-line to add the heat conduction between hot basal body and sealing cylinder, and be directly connected with ring flange or other seal with the second connecting portion by the first connecting portion, make external contact exposed in annular projection space or the outside of ring flange, thereby can be from housing or the outside external contact of directly processing column thick film liquid heater of ring flange, realized add the upper outside contact point of hot basal body welding wire operation after move, make column thick film liquid heater can first carry out the spraying of high temperature fluorine resin coating, the external contact of rear welding, effectively guaranteed the bonding strength between external contact and high temperature wire, farthest optimized the whole installation process of heater.Owing to adding hot basal body, be directly connected with housing or ring flange with sealing cylinder, increased the tightness degree that heater is connected with housing or ring flange, at utmost utilized the space of enclosure interior.
Embodiment bis-:
With reference to Fig. 4, in the present embodiment, thick film circuit 2 is printed on the inner surface that adds hot basal body 1, and sealing cylinder 3 is socketed in the inner side that adds hot basal body 1, for sealing thick film circuit 2.Adding hot basal body 1, to be provided with one end of external contact 5 exposed outside sealing cylinder 3, the bottom of sealing cylinder 3 is provided with the seal 3.1 for closed feed water heater bottom, add the cavity that is formed for cabling between the lower end side of hot basal body 1 and seal 3.1, facilitate the outside of external contact 5 to be electrically connected to.
In above-mentioned explanation, all special instructions that do not add, all adopt technological means of the prior art.
Claims (10)
1. a column thick film liquid heater, comprise that one has adding hot basal body and being arranged on the thick film circuit adding in hot basal body one side of heat conductivility, thick film circuit is provided with for connecting the external contact of power supply, it is characterized in that, described adding in the one side that hot basal body is provided with thick film circuit, is sealed with sealing cylinder, add the column that hot basal body and sealing cylinder are hollow, thick film circuit is arranged on the inner surface or outer surface that adds hot basal body, adds hot basal body and connects in succession with sealing cylinder sealing shroud; Describedly add one end that hot basal body is provided with external contact and be provided with the first connecting portion, one end of the sealing relatively external contact of cylinder is provided with the second connecting portion, and the first connecting portion and the second connecting portion are for mounting flange or container casing.
2. a kind of column thick film liquid heater according to claim 1, it is characterized in that, the described hot basal body that adds is provided with many group thick film circuits, and every group of thick film circuit all includes two external contacts, organizes thick film circuit more and is evenly distributed on the whole surface that adds hot basal body or on part surface.
3. a kind of column thick film liquid heater according to claim 1, is characterized in that, described the first connecting portion is to add the bottom that hot basal body is provided with one end, external contact, and the first connecting portion is provided with the seal for heated sealed matrix bottom.
4. a kind of column thick film liquid heater according to claim 3, is characterized in that, described in add hot basal body to be provided with one end of external contact exposed external in sealing column.
5. a kind of column thick film liquid heater according to claim 3, it is characterized in that, the double sectioned column shape body that described sealing cylinder is different size, one end of the sealing relatively external contact of cylinder is provided with one week annular projection, the position of annular projection is relative with the position of external contact, the bottom of annular projection is the second connecting portion, the second connecting portion and ring flange or container casing seal welding.
6. a kind of column thick film liquid heater according to claim 4, is characterized in that, described the second connecting portion is the bottom of sealing one end, the relatively external contact of cylinder, the second connecting portion and ring flange or container casing seal welding.
7. according to a kind of column thick film liquid heater claimed in claim 4, it is characterized in that, on the bottom of one end, the relatively external contact of described sealing cylinder, welding or die casting have one week welding interface, and welding interface radially distributes, and described welding interface is the second connecting portion.
8. according to a kind of column thick film liquid heater described in any one in claim 1-7, it is characterized in that, described in add hot basal body and sealing cylinder cross section be circle or regular polygon.
9. a kind of column thick film liquid heater according to claim 3, it is characterized in that, describedly add the inner surface that hot basal body is provided with one end, external contact and be provided with internal thread, described seal comprises sealing ring and thread plug, thread plug with add hot basal body and removably connect.
10. a kind of column thick film liquid heater according to claim 1, it is characterized in that, described thick film circuit is printed on the inner surface that adds hot basal body, adding hot basal body, to be provided with one end of external contact exposed external in sealing column, and the bottom of sealing cylinder is provided with the seal for closed feed water heater bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320427450.XU CN203399321U (en) | 2013-04-28 | 2013-07-15 | Columnar thick-film liquid heater |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320229203.9 | 2013-04-28 | ||
| CN201320229203 | 2013-04-28 | ||
| CN201320427450.XU CN203399321U (en) | 2013-04-28 | 2013-07-15 | Columnar thick-film liquid heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203399321U true CN203399321U (en) | 2014-01-15 |
Family
ID=49562142
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310303094.5A Active CN103398464B (en) | 2013-04-28 | 2013-07-15 | Instant-heating and storage electric water heater |
| CN201320427427.0U Expired - Fee Related CN203443069U (en) | 2013-04-28 | 2013-07-15 | Water storage instant-heat integrated electric water heater |
| CN201320427426.6U Expired - Fee Related CN203443068U (en) | 2013-04-28 | 2013-07-15 | Water storage quickly-instantaneously-heating electric water heater |
| CN201320427450.XU Expired - Lifetime CN203399321U (en) | 2013-04-28 | 2013-07-15 | Columnar thick-film liquid heater |
| CN201310301769.2A Expired - Fee Related CN103398463B (en) | 2013-04-28 | 2013-07-15 | Storage, quick-heating and instant-heating electric water heater |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310303094.5A Active CN103398464B (en) | 2013-04-28 | 2013-07-15 | Instant-heating and storage electric water heater |
| CN201320427427.0U Expired - Fee Related CN203443069U (en) | 2013-04-28 | 2013-07-15 | Water storage instant-heat integrated electric water heater |
| CN201320427426.6U Expired - Fee Related CN203443068U (en) | 2013-04-28 | 2013-07-15 | Water storage quickly-instantaneously-heating electric water heater |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310301769.2A Expired - Fee Related CN103398463B (en) | 2013-04-28 | 2013-07-15 | Storage, quick-heating and instant-heating electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (5) | CN103398464B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104507188A (en) * | 2014-12-18 | 2015-04-08 | 沈闽江 | Vertical type thick film heater |
| CN105007639A (en) * | 2015-08-19 | 2015-10-28 | 成都隆芯科技有限公司 | Heating device and heating method for lateral heating |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949319A (en) * | 2014-03-26 | 2015-09-30 | 广东顺德光晟电器股份有限公司 | Instantaneous electric water heater |
| CN105318529B (en) * | 2014-07-22 | 2019-03-29 | 广东光晟物联股份有限公司 | Low pressure-bearing electric heater in separate type |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0074801B1 (en) * | 1981-09-10 | 1985-07-31 | Overseas Automation Ltd | Water heating apparatus |
| GB2338632A (en) * | 1998-06-16 | 1999-12-22 | Pifco Ltd | Metal sheathed planar element: Edge connector with shutter |
| CN202692398U (en) * | 2012-06-06 | 2013-01-23 | 奥特朗电器（广州）有限公司 | Electric water heater |
| CN202769933U (en) * | 2012-08-22 | 2013-03-06 | 九阳股份有限公司 | Safe instant-heating water boiler |
-
2013
- 2013-07-15 CN CN201310303094.5A patent/CN103398464B/en active Active
- 2013-07-15 CN CN201320427427.0U patent/CN203443069U/en not_active Expired - Fee Related
- 2013-07-15 CN CN201320427426.6U patent/CN203443068U/en not_active Expired - Fee Related
- 2013-07-15 CN CN201320427450.XU patent/CN203399321U/en not_active Expired - Lifetime
- 2013-07-15 CN CN201310301769.2A patent/CN103398463B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104507188A (en) * | 2014-12-18 | 2015-04-08 | 沈闽江 | Vertical type thick film heater |
| CN105007639A (en) * | 2015-08-19 | 2015-10-28 | 成都隆芯科技有限公司 | Heating device and heating method for lateral heating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103398463A (en) | 2013-11-20 |
| CN103398463B (en) | 2014-06-11 |
| CN103398464A (en) | 2013-11-20 |
| CN203443069U (en) | 2014-02-19 |
| CN203443068U (en) | 2014-02-19 |
| CN103398464B (en) | 2014-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHEN MINJIANG Free format text: FORMER OWNER: ZHEJIANG XIDESI ELECTRIC CO., LTD. Effective date: 20150520 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 311121 HANGZHOU, ZHEJIANG PROVINCE TO: 313008 HUZHOU, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150520 Address after: 73-75 No. 313008 Huzhou City, Zhejiang Province town of Wuxing Road Patentee after: Shen Minjiang Address before: Yuhang District, Hangzhou City, Zhejiang Province, 311121 West No. 1500 building 3 room 226 Patentee before: ZHEJIANG XIDESI ELECTRICAL Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |
|
| CX01 | Expiry of patent term | ||
| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: Expiration and Termination of 39 Volume 3101 Patent on August 1, 2023 Number: 31-01 Volume: 39 |
|
| CU01 | Correction of utility model |