CN108453452A - Stirling-electric hybrid heat exchanger fin welding structure and its welding method - Google Patents
Stirling-electric hybrid heat exchanger fin welding structure and its welding method Download PDFInfo
- Publication number
- CN108453452A CN108453452A CN201711045553.9A CN201711045553A CN108453452A CN 108453452 A CN108453452 A CN 108453452A CN 201711045553 A CN201711045553 A CN 201711045553A CN 108453452 A CN108453452 A CN 108453452A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- heat exchanger
- fins set
- wall
- welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical group [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 238000005304 joining Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0531—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor internal pipe alignment clamps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of Stirling-electric hybrid heat exchanger fin welding structure and its welding methods, Stirling-electric hybrid heat exchanger fin welding structure includes fins set, fins set is installed in the cylinder of heat exchanger, fins set structure cylindrical in shape and is adapted with cylinder inboard wall, and fins set includes multiple folded fins；Equipped with connection weldering cylinder between fins set and cylinder inboard wall, fins set is embedded in connection and welds in cylinder and welded with weldering cylinder inner wall is connect, and cylinder inboard wall is welded with weldering drum outer wall is connect.Completing the welding method of welding structure use is：Using expansion sleeve by fins set radial direction swell, embedded connection is welded in cylinder, and is connected weldering cylinder extrusion and contacted with cylinder inboard wall, and to being heated outside cylinder, fins set is fixedly secured to one another with cylinder inboard wall by the connection weldering cylinder of melted by heating.Entire welding structure is secured, and fins set and the contact area of heat exchanger cylinder inboard wall increase, and the thermal resistance of contact position reduces, and heat transfer temperature difference reduces, and provides the heat exchange efficiency of entire heat exchanger.
Description
Technical field
The present invention relates to finned heat exchanger technical field more particularly to a kind of Stirling-electric hybrid heat exchanger fin welding structures
And its welding method.
Background technology
In order to improve heat exchange efficiency, usually increased by increasing the stronger sheet metal of heat conductivility on the surface of heat-exchanger rig
The heat exchange surface area of big heat-exchanger rig, to achieve the purpose that improve heat exchange efficiency, this sheet metal is known as fin.Fin is not
So that air is formd strong flow-disturbing in runner with form, and so that flow boundary layer and thermal boundary layer is broken, recombination, to strong
Change heat exchange；Finally, fin can also improve heat exchanger integral strength, effectively expand its application range.Common fin structure shape
Formula has plain fin, louvered fin, saw tooth fin, perforated fin, corrugated fin and folded fin.Folded fin be typically by
The fin of certain length folds the continuous type structure of formation back and forth, and easy processing, infrastructure cost is relatively low, and current application is wider
It is general.
Fin major part on current existing Stirling-electric hybrid heat exchanger is squeezed with direct using red copper wire excision forming
It is molded.The structure processing cost of wire cutting straight forming is very expensive, and the process-cycle is generally all at 1 week or more.Directly squeeze
Although molding fin cost only has the 1/10 of wire cutting, fin and heat exchanger inner wall contact area are small, contact position
Thermal resistance is very big, and heat transfer temperature difference is high, affects the heat exchange efficiency of entire heat exchanger.
Invention content
In order to overcome above-mentioned the deficiencies in the prior art, present invention solves the technical problem that be to provide it is a kind of this
Special woods machine heat exchanger fin welding structure, increases the contact area of fin and heat exchanger interior surface, reduces contact position
Thermal resistance improves heat exchange efficiency.
As the same technical concept, another technical problem solved by the invention be to provide one kind be made it is above-mentioned
The welded welding method of Stirling-electric hybrid heat exchanger fin.
In order to solve the first technical problem mentioned above, the technical solution adopted in the present invention is：
Stirling-electric hybrid heat exchanger fin welding structure, including fins set, the fins set are installed on the cylinder of the heat exchanger
In vivo, it fins set structure cylindrical in shape and is adapted with the cylinder inboard wall, the fins set includes multiple folded fins；
Connection weldering cylinder is equipped between the fins set and the cylinder inboard wall, the fins set is embedded in the connection weldering cylinder
And with connection weldering cylinder inner wall welding, the cylinder inboard wall and connection weldering drum outer wall welding.
Further, adjacent joining end to end for the folded fin connects.
Further, the connection weldering cylinder is the weldering cylinder of tin material.
Further, the folded fin is folded by copper sheet.
To solve above-mentioned second technical problem, the technical solution adopted in the present invention is：
The above-mentioned welded welding method of Stirling-electric hybrid heat exchanger fin is made, includes the following steps：
1) connection weldering cylinder is installed in the cylinder of the heat exchanger, the fins set, which is installed on the connection, welds
In cylinder；
2) expansion sleeve is installed inside the fins set, makes the fins set radially swell, institute using the expansion sleeve
The outer end for stating folded fin is embedded in the connection weldering cylinder, and the connection weldering cylinder is deformed, close with the cylinder inboard wall
Contact；
3) to being heated outside the cylinder of the heat exchanger, make the connection weldering cylinder melted by heating, the folded fin
Outer end and the connection weld cylinder inner wall melting welding, the cylinder inboard wall of the heat exchanger and connection weldering drum outer wall melting welding；
4) after standing, the expansion sleeve is removed.
Further, the expansion sleeve includes sleeve, and sleeve both ends inner wall is taper, and the sleeve both ends are respectively provided with
There is powered plug compatible with the conical inboard wall, multiple notches is offered on the peripheral wall of the sleeve, the notch is by sleeve
End face starting it is axially extending.
Further, the notch is equidistantly opened in the peripheral wall of the sleeve.
After using above-mentioned technical proposal, the beneficial effects of the invention are as follows：
(1) cylinder inboard wall of fins set and heat exchanger welds cylinder by the connection of melted by heating, and melting welding is together each other.Welding knot
Structure is secured.And fins set and the contact area of heat exchanger cylinder inboard wall increase, and the thermal resistance of contact position reduces, and reduces heat exchange
The temperature difference improves the heat exchange efficiency of entire heat exchanger.Also accordingly improve heat exchanger integral strength.
(2) welding method is simple, using the sleeve of expansion sleeve by tubular fins set radially swell, ensure that tubular fin
Group and sleeve concentricity, the uniformity subsequently to weld provide guarantee.The outer end of multiple folded fins constitutes tubular fins set
Periphery wall, the inner ends of multiple folded fins constitutes the internal perisporium of tubular fins set.The outer end insertion connection weldering cylinder of folded fin
It is interior, it is equivalent in the periphery wall insertion connection weldering cylinder of fins set, while connecting the cylinder inboard wall of weldering cylinder crimp and heat exchanger
It comes into full contact with, gets ready for welding.
(3) fins set surrounds after being folded by multiple copper sheets, and connection weldering cylinder is wound by thin soldering piece to be formed；Copper sheet and
Thin soldering piece cost is relatively low, and the two fit applications reduce overall cost.And folded fin is easily processed into type.
Description of the drawings
Fig. 1 is the welded structural schematic diagram of Stirling-electric hybrid heat exchanger fin of the present invention；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the sectional view at A-A in Fig. 2；
Fig. 4 is the partial enlarged view of Fig. 2；
Fig. 5 is the structure front view of expansion sleeve used in welding method of the present invention；
Fig. 6 is the structural side view of expansion sleeve used in welding method of the present invention；
Fig. 7 is the sectional view at B-B in Fig. 6；
In figure：Cylinder is welded in 1- cylinders, 2- fins sets, the outer end of 21- folded fins, the inner end of 22- folded fins, 3- connections,
4- sleeves, 41- notches, 5- powered plugs, 51- through-holes.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figures 1 to 4, fins set 2 is installed in the cylinder 1 of heat exchanger, 2 structure cylindrical in shape of fins set and with heat exchange
1 inner wall of cylinder of device is adapted, and fins set 2 includes multiple folded fins, and folded fin is folded by lower-cost copper sheet,
Joining end to end for adjacent folded fin connects the fins set 2 for surrounding tubular construction.The outer end 21 of multiple folded fins is around formation
The periphery wall of 2 tubular construction of fins set, the inner end 22 of multiple folded fins surround the internal perisporium for forming 2 tubular construction of fins set.
Connection weldering cylinder 3 is equipped between the periphery wall of fins set 2 and 1 inner wall of cylinder of heat exchanger, connection weldering cylinder 3 is by by thin tin
Weld tabs winds to be formed.In the insertion of the outer end 21 connection weldering cylinder 3 of folded fin, the periphery wall insertion for being equivalent to integral fins group 2 connects
Connect weldering cylinder 3 in, and the periphery wall of fins set 2 and connect weldering 3 inner wall of cylinder weld, 1 inner wall of cylinder of heat exchanger with connect weld cylinder 3
Outer wall welds.
Above-mentioned fins set 2 can also be surrounded only by a folded fin of suitable length.
The above-mentioned welded welding method of Stirling-electric hybrid heat exchanger fin is made, includes the following steps：
1) connection weldering cylinder 3 is installed in the cylinder 1 of heat exchanger, fins set 2 is installed in connection weldering cylinder 3；
2) expansion sleeve is installed inside fins set 2, as shown in Figures 5 to 7, expansion sleeve includes sleeve 4, in 4 both ends of sleeve
Wall is taper, and 4 both ends of sleeve are both provided with powered plug 5 compatible with conical inboard wall, and the end face of powered plug 5 is provided with through-hole
51, the driving device (not shown) that the interior installation driving powered plug 5 of through-hole 51 is axially moved, which can be simple
Screw rod and the nut that compacts can also be other power plants.Multiple notches 41 are offered on the peripheral wall of sleeve 4, between notch 41 is equal
Away from the peripheral wall for being opened in sleeve 4.Notch 41 is axially extending by the end face starting of sleeve 4 and does not extend to other end.From sleeve 4
The notch of both ends of the surface starting is staggered.Notch 41 is set as that sleeve 4 is flexible to have reserved gap.
Using driving device, the 5 centering campaign of powered plug of expansion sleeve, sleeve 4 is made to be opened up because notch 41, radial swell,
The also radial swell therewith of fins set 2 simultaneously.Entire extension process has been always ensured that tubular fin due to notch 41 equidistantly opens up
The concentricity of group 2 and sleeve 4, the uniformity subsequently to weld provide guarantee.The insertion of the outer end 21 connection weldering cylinder 3 of folded fin
It is interior, while connecting weldering cylinder 3 and being deformed, it is in close contact with 1 inner wall of cylinder, preparation has been done for follow-up welding.
3) heated outside the cylinder 1 of heat exchanging device, make connection weld 3 melted by heating of cylinder, the outer end 21 of folded fin with
Together, 1 inner wall of cylinder of heat exchanger makes fins set 2 to the 3 inner wall melting welding of connection weldering cylinder indirectly together with connection weldering 3 outer wall melting welding of cylinder
It is fixedly connected with the cylinder 1 of heat exchanger.It increases fins set 2 and the contact area of 1 inner wall of heat exchanger cylinder increases, reduce and connect
The thermal resistance for touching position, that is, reduce heat transfer temperature difference, improve the heat exchange efficiency of entire heat exchanger.It is whole also accordingly to improve heat exchanger
Intensity.
4) (ensure that melting welding position cools down) after standing, using driving device, so that the powered plug 5 of expansion sleeve is externally moved, set
4 radial contractions of cylinder, convenient for removing expansion sleeve.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (7)
1. Stirling-electric hybrid heat exchanger fin welding structure, including：Fins set, the fins set are installed on the cylinder of the heat exchanger
It is interior, it fins set structure cylindrical in shape and is adapted with the cylinder inboard wall, the fins set includes multiple folded fins；It is special
Sign is,
Be equipped with connection weldering cylinder between the fins set and the cylinder inboard wall, the fins set be embedded in the connection weldering cylinder it is interior and
With connection weldering cylinder inner wall welding, the cylinder inboard wall and connection weldering drum outer wall welding.
2. Stirling-electric hybrid heat exchanger fin welding structure as described in claim 1, which is characterized in that the adjacent folding wing
Joining end to end for piece connects.
3. Stirling-electric hybrid heat exchanger fin welding structure as described in claim 1, which is characterized in that the connection weldering cylinder is tin
The weldering cylinder of material.
4. Stirling-electric hybrid heat exchanger fin welding structure as described in claim 1, which is characterized in that the folded fin is by purple
Copper sheet is folded into.
5. the welded welding method of Stirling-electric hybrid heat exchanger fin as described in claim 1, which is characterized in that including with
Lower step：
1) connection weldering cylinder is installed in the cylinder of the heat exchanger, the fins set, which is installed on the connection, welds cylinder
It is interior；
2) expansion sleeve is installed inside the fins set, makes the fins set radially swell, the folding using the expansion sleeve
The outer end of folded fin is embedded in the connection weldering cylinder, and the connection weldering cylinder is deformed, and is in close contact with the cylinder inboard wall；
3) to being heated outside the cylinder of the heat exchanger, make the connection weldering cylinder melted by heating, the folded fin it is outer
Cylinder inner wall melting welding is welded in end with the connection, and the cylinder inboard wall of the heat exchanger welds drum outer wall melting welding with the connection；
4) after standing, the expansion sleeve is removed.
6. welding method as claimed in claim 5, which is characterized in that the expansion sleeve includes sleeve, in the sleeve both ends
Wall is taper, and the sleeve both ends are both provided with powered plug compatible with the conical inboard wall, on the peripheral wall of the sleeve
Multiple notches are offered, the notch is axially extending by the end face starting of sleeve.
7. welding method as claimed in claim 6, which is characterized in that the notch is equidistantly opened in the week of the sleeve
Wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045553.9A CN108453452A (en) | 2017-10-31 | 2017-10-31 | Stirling-electric hybrid heat exchanger fin welding structure and its welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045553.9A CN108453452A (en) | 2017-10-31 | 2017-10-31 | Stirling-electric hybrid heat exchanger fin welding structure and its welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108453452A true CN108453452A (en) | 2018-08-28 |
Family
ID=63220376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711045553.9A Pending CN108453452A (en) | 2017-10-31 | 2017-10-31 | Stirling-electric hybrid heat exchanger fin welding structure and its welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108453452A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3831247A (en) * | 1971-11-22 | 1974-08-27 | United Aircraft Prod | Method of metallurgically bonding a internally finned heat exchange structure |
| JPH09152299A (en) * | 1995-11-30 | 1997-06-10 | Sanyo Electric Co Ltd | Heat exchanger for external combustion engine using regenerating cycle |
| JP2001091075A (en) * | 1999-09-27 | 2001-04-06 | Sharp Corp | Heat exchanger for stirling engine |
| JP2002243291A (en) * | 2001-02-19 | 2002-08-28 | Sharp Corp | Heat exchanger of stirling refrigerating machine and method for manufacturing the same |
| CN1483129A (en) * | 2000-09-01 | 2004-03-17 | 夏普公司 | Heat exchanger for stirling cryocooler, heat exchanger body and method for producing the same |
| CN1760604A (en) * | 2005-10-27 | 2006-04-19 | 中国科学院上海技术物理研究所 | A kind of hot-side heat dissipation device that is used for sterlin refrigerator |
| JP2006258400A (en) * | 2005-03-18 | 2006-09-28 | Sharp Corp | Heat exchanger for stirling engine |
| CN1981167A (en) * | 2004-07-06 | 2007-06-13 | 夏普株式会社 | Heat exchanger and stirling engine |
| CN1997467A (en) * | 2004-06-02 | 2007-07-11 | 圣波尔股份有限公司 | Method and apparatus for forming a heat exchanger |
| CN207386923U (en) * | 2017-10-31 | 2018-05-22 | 山东中科万隆电声科技有限公司 | Stirling-electric hybrid heat exchanger fin welding structure |
-
2017
- 2017-10-31 CN CN201711045553.9A patent/CN108453452A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3831247A (en) * | 1971-11-22 | 1974-08-27 | United Aircraft Prod | Method of metallurgically bonding a internally finned heat exchange structure |
| JPH09152299A (en) * | 1995-11-30 | 1997-06-10 | Sanyo Electric Co Ltd | Heat exchanger for external combustion engine using regenerating cycle |
| JP2001091075A (en) * | 1999-09-27 | 2001-04-06 | Sharp Corp | Heat exchanger for stirling engine |
| CN1483129A (en) * | 2000-09-01 | 2004-03-17 | 夏普公司 | Heat exchanger for stirling cryocooler, heat exchanger body and method for producing the same |
| JP2002243291A (en) * | 2001-02-19 | 2002-08-28 | Sharp Corp | Heat exchanger of stirling refrigerating machine and method for manufacturing the same |
| CN1997467A (en) * | 2004-06-02 | 2007-07-11 | 圣波尔股份有限公司 | Method and apparatus for forming a heat exchanger |
| CN1981167A (en) * | 2004-07-06 | 2007-06-13 | 夏普株式会社 | Heat exchanger and stirling engine |
| JP2006258400A (en) * | 2005-03-18 | 2006-09-28 | Sharp Corp | Heat exchanger for stirling engine |
| CN1760604A (en) * | 2005-10-27 | 2006-04-19 | 中国科学院上海技术物理研究所 | A kind of hot-side heat dissipation device that is used for sterlin refrigerator |
| CN207386923U (en) * | 2017-10-31 | 2018-05-22 | 山东中科万隆电声科技有限公司 | Stirling-electric hybrid heat exchanger fin welding structure |
Non-Patent Citations (1)
| Title |
|---|
| 赵亚忠: "机械工程材料", 西安电子科技大学出版社, pages: 164 - 165 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2033491B1 (en) | A heat transfer device | |
| CN104154778B (en) | Heat exchanger and method for manufacturing heat exchanger | |
| CN207386923U (en) | Stirling-electric hybrid heat exchanger fin welding structure | |
| CN108453452A (en) | Stirling-electric hybrid heat exchanger fin welding structure and its welding method | |
| CN104668921A (en) | Furnace-brazing foldable heat radiation pipe and production method thereof | |
| CN201403216Y (en) | Big-fin electrical heater | |
| CN206461160U (en) | A kind of waterproof plug | |
| CN106949769A (en) | Modular folding heat exchange flat tube | |
| CN201184767Y (en) | High rib type heat-exchanging tube shaped by ironing aluminum | |
| CN106949761A (en) | A kind of spiral heat exchanger and its welding method | |
| CN210773336U (en) | Heating dryer with energy conservation and high efficiency | |
| CN202158278U (en) | Copper aluminum composite tube and connecting tube of outdoor machine of air conditioner | |
| CN210486631U (en) | Internal and external fin radiating tube | |
| CN201476660U (en) | Internal and external spiral fin heat transfer tube | |
| CN206410329U (en) | A kind of laminated type press-bearing water tank | |
| CN208296666U (en) | A kind of spiral fin coil and the KL type fin heat exchanger comprising it | |
| CN102853710A (en) | Connection method for copper-aluminum heat exchanger of gas water heater | |
| CN203478637U (en) | Solderless multi-material composite solar thermal collector board core of thin wall diversion pipe and manufacture mould | |
| CN112129155A (en) | Spiral finned tube and assembly structure of spiral finned tube and smoke baffle plate | |
| CN209526903U (en) | A kind of double resistor ceramic heating tubes | |
| CN210832197U (en) | Electric heater piece capable of electrically activating phase change latent heat | |
| CN214537506U (en) | Heat exchanger of convenient installation | |
| CN206251359U (en) | A kind of titanium electric heating tube | |
| CN205358046U (en) | Quick -witted finned tube completes | |
| CN221615183U (en) | Double-layer efficient resistance heating pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181203 Address after: 261061 Yinfeng Road, Xincheng Street, Weifang High-tech Zone, Shandong Province Applicant after: SHANDONG ZHONGKE WANLONG ELECTROACOUSTIC TECHNOLOGY CO.,LTD. Applicant after: WEIFANG WANLONG ELECTRIC LLC Address before: 261061 Yinfeng Road, Xincheng Street, Weifang High-tech Zone, Shandong Province Applicant before: SHANDONG ZHONGKE WANLONG ELECTROACOUSTIC TECHNOLOGY CO.,LTD. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180828 |