CN107447178A - Heater heating element heater preparation method - Google Patents
Heater heating element heater preparation method Download PDFInfo
- Publication number
- CN107447178A CN107447178A CN201710505120.0A CN201710505120A CN107447178A CN 107447178 A CN107447178 A CN 107447178A CN 201710505120 A CN201710505120 A CN 201710505120A CN 107447178 A CN107447178 A CN 107447178A
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- Prior art keywords
- heating
- heater
- insulating layer
- zone
- spraying
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/073—Metallic material containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a kind of heater heating element heater preparation method, including：Grinding process is carried out to heater housings with blasting craft；Cushion frock and fixation are placed in heating region, one layer of cushion is sprayed in heating region using hot-spraying technique；The first ceramic insulating layer masking frock and fixation are placed on the buffer layer, and with hot-spraying technique, spray aluminum oxide ceramic material forms the first ceramic insulating layer on the buffer layer；Zone of heating masking frock and fixation is placed on the first ceramic insulating layer, with hot-spraying technique on the first ceramic insulating layer spraying-and-heating layer；Both ends spraying-and-heating element electrode on zone of heating；After the completion of zone of heating spraying, the second ceramic insulating layer masking frock and fixation are placed on zone of heating, the second ceramic insulating layer is formed with hot-spraying technique spray aluminum oxide ceramic material.The present invention can improve heat transfer efficiency, using the technique of thermal spraying, be used for the pyrotoxin of heater in heater heat exchange surface spraying-and-heating element.
Description
Technical field
The present invention relates to a kind of heating element heater of heater, more particularly to a kind of heater heating element heater preparation method.
Background technology
Currently used heater heating element heater uses PTC temperature-sensitive elements mostly, and its heating element heater is typically all by viscous
Connect, be welded on heat exchanger, because the thermal resistance for being bonded welding material is larger, cause heat conduction loss more, the efficiency of heating surface is big
It is big to reduce.And due to the inherent characteristic of PTC resistor, in low temperature, the resistance very little of PTC resistor, that is to say, that in ptc heater
During startup, because PTC resistor value is smaller, larger surge impact electric current can be brought, large effect is had to control circuit.
During high temperature, the resistance of PTC resistor is larger, and under conditions of supply voltage is certain, the power output of ptc heater can reduce, no
The flexible control of power can be met.Therefore a kind of heat transfer efficiency height, adding thermal resistance characteristics constant, the flexible heater of power adjusting
Urgently occur.
In order to overcome defect present in prior art, development is a kind of to cause calandria because of the change of operating temperature
The heater of change in resistance, to keep heating power constant, there is important practical usage.
The content of the invention
It is an object of the invention to provide a kind of heater heating element heater preparation method, it is possible to increase heat transfer efficiency, power
Flexible adjustment, it is easy to make, for the heating element heater of heater, using the technique of thermal spraying, sprayed in heater heat exchange surface
Apply the pyrotoxin that heating element heater is used for heater.
The purpose of the present invention is achieved by the following technical programs：
A kind of heater heating element heater preparation method, the heater heating element heater include heater housings 1, cushion 2,
First ceramic insulating layer 3, zone of heating 4, the second ceramic insulating layer 5, heating element heater electrode 6；The cushion 2 is sprayed at heater
The heating region of housing 1, first ceramic insulating layer 3 are sprayed on cushion 2, and the zone of heating 4 is sprayed at the first ceramics
On insulating barrier 3, the zone of heating 4 is made up of nichrome, and second ceramic insulating layer 5 is sprayed on zone of heating 4, and 2 add
Hot electrodes 6 are connected to the both ends of zone of heating 4；Heater heating element heater preparation method, comprises the following steps：
1) grinding process is carried out to heater housings 1 with blasting craft；
2) cushion frock 7 and fixed, the window size and heating region of the cushion frock 7 are placed in heating region
Size is identical, then sprays one layer of cushion 2 in heating region using hot-spraying technique；
3) the first ceramic insulating layer masking frock 8 and fixed, the first ceramic insulating layer masking are placed on the buffer layer 2
The window size of frock 8 is less than heating region size；
4) with hot-spraying technique on the buffer layer 2, spray aluminum oxide ceramic material forms the first ceramic insulating layer 3；
5) after the completion of the spraying of the first ceramic insulating layer 3, zone of heating masking frock 9 is placed on the first ceramic insulating layer 3 simultaneously
Fixed, the zone of heating masking windowing of frock 9 shape is consistent with the shape of zone of heating 4, with hot-spraying technique in the first ceramic insulation
Spraying-and-heating layer 4 on layer 3；
6) the both ends spraying-and-heating element electrode 6 on zone of heating 4, the electrical connection for zone of heating 4；
7) after the completion of the spraying of zone of heating 4, the second ceramic insulating layer masking frock 10 is placed on zone of heating 4 and is fixed,
The second ceramic insulating layer 5 is formed with hot-spraying technique spray aluminum oxide ceramic material.
The purpose of the present invention can also further be realized by following technical measures：
Foregoing heater heating element heater preparation method, wherein cushion 2 are nickel chromium triangle or nickel aluminium or nickel-molybdenum alloy.
Foregoing heater heating element heater preparation method, wherein the first ceramic insulating layer 3, the second ceramic insulating layer 5 are oxidation
Aluminized coating.
Foregoing heater heating element heater preparation method, wherein hot-spraying technique are plasma spraying or flame-spraying or Supersonic
Fast flame-spraying or electric arc spraying.
Foregoing heater heating element heater preparation method, wherein zone of heating 4 are distributed in the first ceramic insulating layer 3 in strip is snakelike
On.
Compared with prior art, the beneficial effects of the invention are as follows：The heater heating element heater preparation method of the present invention can make
Heater structure becomes compact, is adapted to the installation of heater；Heater geometry shape is unrestricted, is directed to special-shaped heating
Device, such a method are most advantageous.Heating element heater uses metal or metal alloy stable performance, and resistance is not by the shadow of temperature
Ring, be easy to Power Control, in wide temperature working range, heating element heater resistance keeps constant, in the absence of power attenuation situation.By
Be not in larger unlatching surge current in adding thermal resistance stable performance, the requirement to control system is smaller.Due to not using
The bonding way of ptc heater, the thermal resistance between heating element heater heat exchanger is reduced, substantially increases heat transfer efficiency.
Brief description of the drawings
Fig. 1 is the cushion spray structure figure of the present invention；
Fig. 2 is the first ceramic insulating layer spray structure figure of the present invention；
Fig. 3 is the zone of heating spray structure figure of the present invention；
Fig. 4 is the second ceramic insulating layer spray structure figure of the present invention.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
The heater heating element heater preparation method of the present invention, the heater heating element heater include heater housings 1, buffering
The 2, first ceramic insulating layer 3 of layer, zone of heating 4, the second ceramic insulating layer 5, heating element heater electrode 6；First ceramic insulating layer
3rd, the second ceramic insulating layer 5 is alumina ceramic insulating layer, and the cushion 2 is sprayed at the heating region of heater housings 1, institute
State the first ceramic insulating layer 3 to be sprayed on cushion 2, the zone of heating 4 is sprayed on the first ceramic insulating layer 3, the heating
Layer 4 is made up of nichrome, and second ceramic insulating layer 5 is sprayed on zone of heating 4, and 2 heating element heater electrodes 6 connect respectively
In the both ends of zone of heating 4；Heater heating element heater preparation method, comprises the following steps：
1) grinding process is carried out to heater housings 1 with blasting craft, to increase the faying face of coating and heater housings
Product, so as to increase the bond strength of coating and heater housings；
2) after completing grinding process, as shown in figure 1, placing cushion frock 7 in heating region, tool locating hole 11 is utilized
Position and fix, cushion frock 7 is not shifted in spraying process, the window size of the cushion frock 7 is with adding
Hot-zone domain sizes are identical, then utilize hot-spraying technique (including plasma spraying, flame-spraying, HVAF, electric arc
Spraying etc. technique), heating region spray one layer of cushion 2, (its sprayed on material typically chooses nickel chromium triangle, nickel aluminium, nickel-molybdenum alloy),
The purpose of this coating is to increase the bond strength of coating and housing, eliminates the heater that temperature shock is brought in heating process
Housing and the thermal stress for applying interlayer；
3) after the completion of layer 2 to be buffered sprays, cushion frock 7 is removed, as shown in Fig. 2 placing the first pottery on the buffer layer 2
Porcelain insulating layer, which is covered frock 8 and positioned using tool locating hole 11, to be fixed, the windowing of the first ceramic insulating layer masking frock 8
Size is less than heating region size, in order to prevents the thermal expansion contraction coefficients of aluminium oxide ceramics and heater housings not
Together, the warpage of alumina ceramic coating, deformation, embrittlement when eliminating temperature change；
4) hot-spraying technique (including plasma spraying, flame-spraying, HVAF, electric arc spraying are utilized and then
Etc. technique) on the buffer layer 2, spray aluminum oxide ceramic material forms the first ceramic insulating layer 3, on the one hand it is to be used to add that it, which is acted on,
Thermal element is isolated with the electric insulation of heater housings, is on the other hand in order that heat passes through aluminum oxide caused by heating element heater
On ceramic conductive to heater housings, recycle heat-conducting medium to carry out heat exchange, realize the heat output of heater, therefore aoxidize
Aluminium thickness of ceramic coating is thinned as far as possible under conditions of electric insulation requirement is met, to increase heat conduction efficiency；
5) after the completion for the treatment of the spraying of the first ceramic insulating layer 3, the first ceramic insulating layer masking frock 8 is removed, as shown in figure 3,
Zone of heating masking frock 9 is placed on the first ceramic insulating layer 3 and is fixed, the zone of heating masking windowing of frock 9 is shaped as designed
Zone of heating 4 shape, for example, zone of heating 4 is distributed on the first ceramic insulating layer 3 in strip is snakelike.Reuse thermal spraying
Technique (including the technique such as plasma spraying, flame-spraying, HVAF, electric arc spraying) is in the first ceramic insulating layer 3
The metal or gold that upper spraying-and-heating layer 4, the wherein resistance of zone of heating 4 depend on the thickness of heating element heater coating and spraying is formed
Belong to the resistivity of alloy coat；
6) the both ends spraying-and-heating element electrode 6 on zone of heating 4, the electrical connection for heating element heater；
7) in order to realize electric insulation and it is heat-insulated, zone of heating 4 spraying after the completion of, remove zone of heating masking frock 9, such as Fig. 4
It is shown, the second ceramic insulating layer masking frock 10 is placed on zone of heating 4 and is fixed, with hot-spraying technique spray aluminum oxide ceramics
Material or aluminum oxide form the second ceramic insulating layer 5.
The spraying method that the present invention uses has the works such as plasma spraying, flame-spraying, HVAF, electric arc spraying
Skill etc., nichrome is ground into a diameter of 0.005-0.06mm powder particle first；Because the powder of this diameter is to spray
It is highly advantageous for coating method, the blocking of spray gun will not be caused because material particle size is larger.
Embodiment one, in Plasma Spraying Process Using, the nozzle and electrode of spray gun connect the both positive and negative polarity of power supply respectively.Nozzle and
Working gas (such as helium, nitrogen gas) is passed through between electrode, is ignited electric arc by high-frequency spark.Gas is heated and is allowed to by electric arc
Ionization, high temperature plasma gas is produced, the pre- powder material that dusts is sent into high temperature plasma gas by powder feeding tracheae, rapid to be heated
To molten condition, it is that carrier gas forms plasma flame flow by nitrogen or argon gas, preheated processing is ejected into certain speed
Matrix surface forms the coating of densification, and a certain amount of hydrogen conduct can be mixed at spray metal or metal alloy, in carrier gas
Reducing gas, it is oxidized to prevent coating in forming process.
Embodiment two, the zone of heating 4 are sprayed on the first ceramic insulating layer 3 with flame spraying, the flame-spraying
Method comprises the following steps：
Nichrome powder particle is injected into flame by powder feeding pipe, nichrome powder particle is heated to by flame
Melting, semi-molten state；
Using argon gas or nitrogen as protective gas, its atomization is made with protective gas gas shock nichrome powder particle,
And be ejected into 2000m/s speed on the first ceramic insulating layer 3, form the zone of heating 4 of densification.Due to melting for nickel chromium
Melt, semi-molten state temperature before being ejected into up to alumina ceramic insulating layer has begun to reduce, therefore sprayed reaching heater
Temperature when applying region can reduce on a large scale, and the temperature of such heating region is low, and residual stress is small, will not both damage heater
The flatness of body, also the compactness of heating element heater coating is played a role.
In above-mentioned several techniques, the material sprayed on aluminium oxide ceramics need not carry out baking process again, therefore
Avoid the need for just not requiring temperature tolerance significantly by high-temperature baking again, being especially suitable for the requirement of aluminum heater,
Because during high-temperature baking of the aluminum heater body more than 600 DEG C, it may appear that the melting phenomenon of part.
Existing heater frequently with PTC-element heat, it is necessary to outside PTC-element heater element wrap up one layer of steel cage,
PTC-element be powered caused by heat by the air transmitted between PTC-element and steel cage to steel cage, then pass through steel cage and outside
Current carry out heat exchange, and the program has the shortcomings that thermal loss by air transmitted.Heating element material of the present invention directly sprays
It is coated onto in heater body, reduces heat exchange loss, improve heat conduction efficiency.The heating element heater of the present invention uses nickel chromium triangle
Alloy, after working long hours, in the absence of power attenuation situation.
In addition to the implementation, the present invention can also have other embodiment, all to use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (5)
1. a kind of heater heating element heater preparation method, the heater heating element heater includes heater housings 1, cushion 2, the
One ceramic insulating layer 3, zone of heating 4, the second ceramic insulating layer 5, heating element heater electrode 6；The cushion 2 is sprayed at heater case
The heating region of body 1, first ceramic insulating layer 3 are sprayed on cushion 2, and the zone of heating 4 is sprayed at the first ceramics absolutely
In edge layer 3, the zone of heating 4 is made up of nichrome, and second ceramic insulating layer 5 is sprayed on zone of heating 4,2 heating
Element electrode 6 is connected to the both ends of zone of heating 4；Characterized in that, heater heating element heater preparation method, including following step
Suddenly：
1) grinding process is carried out to heater housings 1 with blasting craft；
2) cushion frock 7 and fixed, window size and the heating region size of the cushion frock 7 are placed in heating region
It is identical, then spray one layer of cushion 2 in heating region using hot-spraying technique；
3) the first ceramic insulating layer masking frock 8 and fixed, the first ceramic insulating layer masking frock are placed on the buffer layer 2
8 window size is less than heating region size；
4) with hot-spraying technique on the buffer layer 2, spray aluminum oxide ceramic material forms the first ceramic insulating layer 3；
5) after the completion of the spraying of the first ceramic insulating layer 3, zone of heating masking frock 9 is placed on the first ceramic insulating layer 3 and is fixed,
The zone of heating masking windowing of frock 9 shape is consistent with the shape of zone of heating 4, with hot-spraying technique on the first ceramic insulating layer 3
Spraying-and-heating layer 4；
6) the both ends spraying-and-heating element electrode 6 on zone of heating 4, the electrical connection for zone of heating 4；
7) after the completion of the spraying of zone of heating 4, the second ceramic insulating layer masking frock 10 is placed on zone of heating 4 and is fixed, with heat
Spraying coating process spray aluminum oxide ceramic material forms the second ceramic insulating layer 5.
2. heater heating element heater preparation method as claimed in claim 1, the cushion 2 is that nickel chromium triangle or nickel aluminium or nickel molybdenum close
Gold.
3. heater heating element heater preparation method as claimed in claim 1, the ceramics of the first ceramic insulating layer 3, second are absolutely
Edge layer 5 is aluminum oxide coating layer.
4. heater heating element heater preparation method as claimed in claim 1, the hot-spraying technique is plasma spraying or fire
Flame sprays or HVAF or electric arc spraying.
5. heater heating element heater preparation method as claimed in claim 1, the zone of heating 4 is distributed in first in strip is snakelike
On ceramic insulating layer 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505120.0A CN107447178A (en) | 2017-06-28 | 2017-06-28 | Heater heating element heater preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505120.0A CN107447178A (en) | 2017-06-28 | 2017-06-28 | Heater heating element heater preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107447178A true CN107447178A (en) | 2017-12-08 |
Family
ID=60487241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710505120.0A Pending CN107447178A (en) | 2017-06-28 | 2017-06-28 | Heater heating element heater preparation method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107447178A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979882A (en) * | 2017-12-18 | 2018-05-01 | 上海大豪瑞法喷涂机械有限公司 | A kind of novel electric heating film |
| CN108411296A (en) * | 2018-02-13 | 2018-08-17 | 上海楚越机械设备有限公司 | A kind of preparation method of stratie |
| CN113025944A (en) * | 2021-03-04 | 2021-06-25 | 哈动国家水力发电设备工程技术研究中心有限公司 | Corrosion protection method for movable guide vane of seawater pump water turbine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527978A (en) * | 2008-03-05 | 2009-09-09 | 孔喜 | Electrothermal film part and product thereof |
| CN106828021A (en) * | 2017-03-03 | 2017-06-13 | 镇江海姆霍兹传热传动系统有限公司 | Auto heater temperature sensor |
| CN106881530A (en) * | 2017-03-03 | 2017-06-23 | 镇江海姆霍兹传热传动系统有限公司 | Spraying red copper layer welding method |
-
2017
- 2017-06-28 CN CN201710505120.0A patent/CN107447178A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527978A (en) * | 2008-03-05 | 2009-09-09 | 孔喜 | Electrothermal film part and product thereof |
| CN106828021A (en) * | 2017-03-03 | 2017-06-13 | 镇江海姆霍兹传热传动系统有限公司 | Auto heater temperature sensor |
| CN106881530A (en) * | 2017-03-03 | 2017-06-23 | 镇江海姆霍兹传热传动系统有限公司 | Spraying red copper layer welding method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979882A (en) * | 2017-12-18 | 2018-05-01 | 上海大豪瑞法喷涂机械有限公司 | A kind of novel electric heating film |
| CN108411296A (en) * | 2018-02-13 | 2018-08-17 | 上海楚越机械设备有限公司 | A kind of preparation method of stratie |
| CN113025944A (en) * | 2021-03-04 | 2021-06-25 | 哈动国家水力发电设备工程技术研究中心有限公司 | Corrosion protection method for movable guide vane of seawater pump water turbine |
| CN113025944B (en) * | 2021-03-04 | 2023-01-13 | 哈动国家水力发电设备工程技术研究中心有限公司 | Corrosion protection method for movable guide vane of seawater pump water turbine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 212000 floor 1, 2 Chuang Chuang garden, 707 Changjiang Road, Zhenjiang, Jiangsu Applicant after: Zhenjiang helm Hotz heat transfer transmission system Co., Ltd. Address before: 212000 30 Block 99, 15 Dingmaojing Road, Zhenjiang City, Jiangsu Province Applicant before: Zhenjiang helm Hotz heat transfer transmission system Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171208 |
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| WD01 | Invention patent application deemed withdrawn after publication |