CN2896808Y - Water-cooling radiating device and water cooling head - Google Patents
Water-cooling radiating device and water cooling head Download PDFInfo
- Publication number
- CN2896808Y CN2896808Y CNU2006200180081U CN200620018008U CN2896808Y CN 2896808 Y CN2896808 Y CN 2896808Y CN U2006200180081 U CNU2006200180081 U CN U2006200180081U CN 200620018008 U CN200620018008 U CN 200620018008U CN 2896808 Y CN2896808 Y CN 2896808Y
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- water
- fin
- heat conducting
- cooled
- conducting base
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000001816 cooling Methods 0.000 title description 5
- 230000017525 heat dissipation Effects 0.000 claims abstract description 16
- 239000011469 building brick Substances 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 10
- 239000012809 cooling fluid Substances 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract 2
- 239000000110 cooling liquid Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000009183 running Effects 0.000 description 3
- 238000004512 die casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
A water-cooled heat dissipating device and its water block, wherein the said water-cooled heat dissipating device comprises a water block, a pump connected with the water block, and cooling fluid is filled inside the pump to dissipate heat of electronic parts; the said water block comprises a shell and a metal plate, and the said shell is provided with a hollow and sealed cavity; a water inlet interface and a water outlet interface communicated with the cavity is connected outside the shell; the metal plate bears continuous folds to form a plurality of heat sinks, and a radiating channel is provided between each two heat sinks; all heat sinks is attached to bottom of the cavity in the shell at one end. In this way, the utility model offers concentrated heat sinks and large surface areas for heat dissipation where space is restricted, and cooling liquid is used for heat exchange to greatly enhance heat conduction and dissipation efficiency.
Description
Technical field
The utility model relates to a kind of water-cooled power converter and water-cooled head thereof, particularly a kind of water-cooled power converter and water-cooled head thereof that is installed in electronic building brick.
Background technology
The central processing unit of previous calculation machine (CPU) running speed is slow, add the ventilation type heat abstractor that fan is constituted with radiator, come as the equipment of heat radiation promptly enough, but the frequency of central processing unit has surpassed 3GHz recently, and frequency and heat are proportional, and therefore, above-mentioned heat abstractor is subject to the spatial limitation of casing, more and more be difficult to follow the lifting of central processing unit running speed, and effectively solve the problem of heat radiation; In addition, disturbing people's noise in that high-revolving fan produces, also is that people are difficult to stand, thus have the water-cooled power converter and the water-cooled head thereof of high heat dissipation efficiency and low noise, can be in order to another solution of the problem of dispelling the heat to be provided.
Existing water-cooled head, M250533 discloses as the TaiWan, China letters patent, it mainly includes a heat conducting base and the lid of a closing cap above heat conducting base, and between heat conducting base and lid, be formed with an airtight cavity volume, the extension of the end face of heat conducting base convexes with shim and a plurality of fin in addition, and described shim and each fin are to be placed in the above-mentioned airtight cavity volume; On the side plate of described lid, offer two openings, each opening be respectively with the output in the external world, go into pipe and be communicated with, and it is to be positioned on the two-phase heteropleural of shim.
Yet, existing water-cooled head, under using, reality still has following problem points, because between its heat conducting base and shim, the fin is with one die casting or extrusion forming, being provided with outside the cost of mould not only arranged,, more must offer the mould of different size respectively for the radiating requirements of different electronic modules, so, will the manufacturing cost of water-cooled head can't be effectively reduced; Other also is subjected to factors such as Mold Making, material flowability, withdrawing pattern nargin strict arresting and limits, and make the low cooling surface area that reaches of density of each fin few with distance between height, thickness and the wantonly two adjacent fin of each fin of die casting or extrusion forming; Moreover, because the surface of each fin is a smooth flat, and make cooling fluid each fin of flowing through fast, cause the heat exchanging process of each fin and cooling fluid not good; Be low, can't satisfy the radiating requirements of electronic building brick at all with the heat dissipation of, above-mentioned water-cooled head that constitutes and water-cooled power converter with this water-cooled head.
So, the inventor is thoughts on the problems referred to above point and be engaged in research and development experience for many years, and at inconvenience that can improve and problem points, be to concentrate on studies and cooperate actual utilization, and, propose a kind of reasonable in design and effectively improve the utility model of the problems referred to above point finally in line with excelsior spirit.
Summary of the invention
A purpose of the present utility model, be to provide a kind of water-cooled head, it is that Curved Continuous by metallic plate is converted into shape, can be under the requirement of the restriction of having living space, form intensive fin and more cooling surface area, making sufficient heat exchanging process, and significantly increase the leading of water-cooled head, heat dissipation with cooling fluid.
Another purpose of the present utility model, be to provide a kind of water-cooled power converter, it is that Curved Continuous by the metallic plate of water-cooled head inside is converted into shape, can be under the requirement of the restriction of having living space, form intensive fin and more cooling surface area, making sufficient heat exchanging process, and significantly increase the leading of water-cooled power converter, heat dissipation with cooling fluid.
In order to reach above-mentioned purpose, the utility model provides a kind of water-cooled head, it comprises a housing and a metallic plate, described housing has the airtight cavity volume of a hollow, go into water swivel and water out adapter in what being externally connected to of housing was communicated with cavity volume, and metallic plate is to be formed with a plurality of fin with continuous bending, and is formed with a heat dissipation channel between wantonly two adjacent fin, and an end of each fin is to attach the cavity volume bottom surface of contact at housing.
In order to reach above-mentioned purpose, the utility model also provides a kind of water-cooled head, it comprises a housing and a metallic plate, described housing has the airtight cavity volume of a hollow, go into water swivel and water out adapter in what being externally connected to of housing was communicated with cavity volume, and metallic plate is with continuous bending and compressed and be formed with a plurality of fin, and is formed with a heat dissipation channel between wantonly two adjacent fin, and an end of each fin is to attach the cavity volume bottom surface that contacts at housing.
In order to reach another above-mentioned purpose, the utility model provides a kind of water-cooled power converter, it comprises a water-cooled head and a pump that is communicated with it, and portion is filled with cooling fluid within it, to provide electronic building brick to dispel the heat, wherein said water-cooled head comprises a housing and a metallic plate, described housing has the airtight cavity volume of a hollow, go into water swivel and water out adapter in what being externally connected to of housing was communicated with cavity volume, and metallic plate is to be formed with a plurality of fin with continuous bending, and between wantonly two adjacent fin, being formed with a heat dissipation channel, an end of each fin is to attach the cavity volume bottom surface of contact at housing.
In order to reach another above-mentioned purpose, the utility model also provides a kind of water-cooled power converter, it comprises a water-cooled head and a pump that is communicated with it, and portion is filled with cooling fluid within it, to provide electronic building brick to dispel the heat, wherein said water-cooled head comprises a housing and a metallic plate, described housing has the airtight cavity volume of a hollow, go into water swivel and water out adapter in what being externally connected to of housing was communicated with cavity volume, and metallic plate is with continuous bending and compressed and be formed with a plurality of fin, and between wantonly two adjacent fin, being formed with a heat dissipation channel, an end of each fin is to attach the cavity volume bottom surface of contact at housing.
Description of drawings
Fig. 1 is the utility model water-cooled power converter combination schematic diagram;
Fig. 2 is the local combination of a water-cooled head of the present utility model schematic diagram;
Fig. 3 is a water-cooled head combination schematic diagram of the present utility model;
Fig. 4 is a metallic plate stereo appearance figure of the present utility model;
Fig. 5 is the user mode figure that the utility model is applied to electronic building brick;
Fig. 6 is the water-cooled assembled sectional view of Fig. 5;
Fig. 7 is another embodiment stereo appearance figure of metallic plate of the present utility model;
Fig. 8 is the partial enlarged drawing of Fig. 7.
Description of reference numerals: water-cooled 1; Housing 10; Heat conducting base 11; Groove 111; Projection 112; Loam cake 12; Shut 121; Coaming plate 122; Opening 123; Cavity volume 13; Go into water swivel 14; Water out adapter 15; Metallic plate 20; Fin 21; Foramen lacerum 211; Lift sheet 212 outward; Heat radiation runner 22; Pump 3; Water-cooled row 4; Water tank 5; Water-supply-pipe 6; Electronic building brick 7.
Embodiment
Relevant feature of the present utility model and technology contents see also following detailed description and accompanying drawing, and appended diagram only provides reference and explanation, is not to be used for the utility model is limited.
See also Fig. 1 to shown in Figure 3, the utility model provides a kind of water-cooled power converter and water-cooled head thereof, described water-cooled power converter comprises a water-cooled 1, one pump 3, water-cooled row's 4, one water tank 5 and a plurality of sections water-supply-pipes 6 that are communicated with above-mentioned each assembly, and wherein said water-cooled 1 includes a housing 10 and a metallic plate 20;
Described housing 10 includes a heat conducting base 11 and and covers the loam cake 12 that is connected in heat conducting base 11 tops, and between heat conducting base 11 and loam cake 12, be formed with the airtight cavity volume of a hollow 13, described heat conducting base 11 is made with the good material of thermal conductivity, and offer an annular groove 111 in its end face periphery, under the mediad of the bottom surface of heat conducting base 11, protruded out a round bump 112 in addition; Described loam cake 12 has the coaming plate 122 that a shut 121 and extends downward vertically along shut 121 peripheries, and be formed with an opening 123 in the end of coaming plate 122, described opening 123 is in order to the top of cover cap in heat conducting base 11, and the end that makes coaming plate 122 embeds in the groove 111 of heat conducting base 11, in addition be connected with one respectively and go into a water swivel 14 and a water out adapter 15, and described to go into water swivel 14 be to be communicated with above-mentioned cavity volume 13 with water out adapter 15 in upper and lower two sides of coaming plate 122.
Described metallic plate 20 is to be formed with a plurality of skewed fin 21 with continuous bending, and be formed with a heat dissipation channel 22 in wantonly two 21 of adjacent fin, each fin 21 is to be located in the cavity volume 13 of housing 10, and the one end is to attach contact on the heat conducting base 11 of housing 10, and each fin 21 is to can be solid welding to be connected with connected mode between the heat conducting base 11; In addition, be that punching out is formed with a plurality of foramen lacerums (Slit) 211 (as shown in Figure 4) on each fin 21 of present embodiment, described foramen lacerum 211 can be many seams formula foramen lacerum or louvered foramen lacerum kenel, and between foramen lacerum 211 1 sides and fin 21, be formed with the outer sheet 212 that lifts that is parallel to each other, described foramen lacerum 211 and the setting of lifting sheet 212 outward, each fin 21 that can increase is long-pending with the contact surface of cooling fluid.
See also Fig. 5 and shown in Figure 6, water-cooled power converter of the present utility model is to provide an electronic building brick 7 heat radiations, earlier the water swivel 14 of going into of water-cooled 1 is seen through the discharge outlet that water-supply-pipe 6 is communicated with pumps 3 during use, water out adapter 15 then is communicated in water-cooled row 4 inlet, inferior water-cooled 1 is installed on the electronic building brick 7 (as: CPU), smear heat-conducting medium (figure does not show) in projection 112 belows of heat conducting base 11, again that it is smooth on the end face of electronic building brick 7, the heat that described electronic building brick 7 runnings are produced will be directed on each fin 21 by heat conducting base 11, mat pump 3 drives inner cooling fluid and enters in the cavity volume 13 of housing 10 from going into water swivel 14, described cooling fluid each fin 21 of will flowing through in regular turn, the foramen lacerum 211 of heat dissipation channel 22 and fin 21 with lift sheet 212 outward, with heat is derived fast band from, and back side generation turbulent flow (Turbulent Flow) phenomenon that can outside each, lift sheet 212 by cooling fluid, to slow down the flow through speed of fin 21 of cooling fluid, make cooling fluid reach heat exchanging process more fully, lead and significantly promote it with each fin 21, heat dissipation.
See also Fig. 7 and shown in Figure 8, it is the partial enlarged drawing that is respectively another embodiment stereo appearance figure of metallic plate of the present utility model and Fig. 7, metallic plate 20 of the present utility model is except that can be the foregoing description, also can be as the kenel of present embodiment, it is in that metallic plate 20 is imposed continuous bending after being formed with a plurality of fin 21, again each described fin 21 is imposed compression, forming mutual subsides butt with an end that makes fin 21 and adjacent fin 21 touches, use and be formed with more highdensity fin 21, and be applied on the electronic building brick of high heat, not only can save the die cost of die sinking, more can significantly shorten the development operation time of new product.
The above only is a preferable possible embodiments of the present utility model, be not so promptly inflexible limit claim of the present utility model, so the equivalent structure that uses the utility model specification and graphic content to do such as changes, or directly or indirectly apply to other relevant technical field, all in like manner all be included in the scope that the utility model contains.
Claims (26)
1. a water-cooled head is characterized in that, comprising:
One housing has the airtight cavity volume of a hollow, goes into water swivel and water out adapter in what being externally connected to of described housing was communicated with cavity volume; And
One metallic plate is to be formed with a plurality of fin with continuous bending, and is formed with a heat dissipation channel between wantonly two adjacent fin, and an end of each described fin is to attach the cavity volume bottom surface of contact at housing.
2. water-cooled head as claimed in claim 1 is characterized in that: described housing includes a heat conducting base and and covers the loam cake that is connected in heat conducting base, and is formed with described cavity volume between heat conducting base and loam cake.
3. water-cooled head as claimed in claim 2, it is characterized in that: offer an annular groove in described heat conducting base end face, in addition described loam cake then has a shut and along the outward extending coaming plate of shut periphery, and the end of described coaming plate is to embed in the groove of heat conducting base and connect.
4. water-cooled head as claimed in claim 3 is characterized in that: the bottom surface mediad of described heat conducting base extends into shape outward a projection.
5. water-cooled head as claimed in claim 3 is characterized in that: describedly go into water swivel and water out adapter is to be connected on the coaming plate of loam cake.
6. water-cooled head as claimed in claim 1 is characterized in that: each fin of described metallic plate is provided with a plurality of foramen lacerums, and lifts sheet outside being formed with between foramen lacerum and fin.
7. a water-cooled head is characterized in that, comprising:
One housing has the airtight cavity volume of a hollow, goes into water swivel and water out adapter in what being externally connected to of described housing was communicated with cavity volume; And
One metallic plate is with continuous bending and compressed and be formed with a plurality of fin, and is formed with a heat dissipation channel that between wantonly two adjacent fin one end of each described fin is to attach the cavity volume bottom surface that contacts at housing.
8. water-cooled head as claimed in claim 7 is characterized in that: described housing includes a heat conducting base and and covers the loam cake that is connected in heat conducting base, and is formed with described cavity volume between heat conducting base and loam cake.
9. water-cooled head as claimed in claim 8, it is characterized in that: offer an annular groove in described heat conducting base end face, in addition described loam cake then has a shut and along the outward extending coaming plate of shut periphery, and the end of described coaming plate is to embed in the groove of heat conducting base and connect.
10. water-cooled head as claimed in claim 9 is characterized in that: the bottom surface mediad of described heat conducting base extends into shape outward a projection.
11. water-cooled head as claimed in claim 9 is characterized in that: describedly go into water swivel and water out adapter is to be connected on the coaming plate of loam cake.
12. water-cooled head as claimed in claim 7 is characterized in that: each fin of described metallic plate is provided with a plurality of foramen lacerums, and lifts sheet outside being formed with between foramen lacerum and fin.
13. water-cooled head as claimed in claim 7 is characterized in that: an end of described fin and adjacent fin is to paste butt mutually to touch.
14. a water-cooled power converter is used to provide electronic building brick to dispel the heat, and comprises a water-cooled head, a pump, water-cooled row, a water tank and a plurality of sections water-supply-pipes that are communicated with above-mentioned each assembly, it is characterized in that:
Described water-cooled head includes a housing and a metallic plate, and described housing has the airtight cavity volume of a hollow, and in its be externally connected to be communicated with cavity volume go into water swivel and water out adapter; Described metallic plate is to be formed with a plurality of fin with continuous bending, and is formed with a heat dissipation channel between wantonly two adjacent fin, and an end of each described fin is to attach the cavity volume bottom surface of contact at housing.
15. water-cooled power converter as claimed in claim 14 is characterized in that: described housing includes a heat conducting base and and covers the loam cake that is connected in heat conducting base, and is formed with described cavity volume between heat conducting base and loam cake.
16. water-cooled power converter as claimed in claim 15, it is characterized in that: offer an annular groove in described heat conducting base end face, in addition described loam cake then has a shut and along the outward extending coaming plate of shut periphery, and the end of described coaming plate is to embed in the groove of heat conducting base and connect.
17. water-cooled power converter as claimed in claim 16 is characterized in that: the bottom surface mediad of described heat conducting base extends into shape outward a projection.
18. water-cooled power converter as claimed in claim 16 is characterized in that: describedly go into water swivel and water out adapter is to be connected on the coaming plate of loam cake.
19. water-cooled power converter as claimed in claim 14 is characterized in that: each fin of described metallic plate is provided with a plurality of foramen lacerums, and lifts sheet outside being formed with between foramen lacerum and fin.
20. a water-cooled power converter is used to provide electronic building brick to dispel the heat, and comprises a water-cooled head, a pump, water-cooled row, a water tank and a plurality of sections water-supply-pipes that are communicated with above-mentioned each assembly, it is characterized in that:
Described water-cooled head includes a housing and a metallic plate, and described housing has the airtight cavity volume of a hollow, and in its be externally connected to be communicated with cavity volume go into water swivel and water out adapter; Described metallic plate is with continuous bending and compressed and be formed with a plurality of fin, and is formed with a heat dissipation channel between wantonly two adjacent fin, and an end of each described fin is to attach the cavity volume bottom surface that contacts at housing.
21. water-cooled power converter as claimed in claim 20 is characterized in that: described housing includes a heat conducting base and and covers the loam cake that is connected in heat conducting base, and is formed with described cavity volume between heat conducting base and loam cake.
22. water-cooled power converter as claimed in claim 21, it is characterized in that: offer an annular groove in described heat conducting base end face, in addition described loam cake then has a shut and along the outward extending coaming plate of shut periphery, and the end of described coaming plate is to embed in the groove of heat conducting base and connect.
23. water-cooled power converter as claimed in claim 22 is characterized in that: the bottom surface mediad of described heat conducting base extends into shape outward a projection.
24. water-cooled power converter as claimed in claim 22 is characterized in that: describedly go into water swivel and water out adapter is to be connected on the coaming plate of loam cake.
25. water-cooled power converter as claimed in claim 20 is characterized in that: each fin of described metallic plate is provided with a plurality of foramen lacerums, and lifts sheet outside being formed with between foramen lacerum and fin.
26. water-cooled power converter as claimed in claim 20 is characterized in that: an end of described fin and adjacent fin is to paste butt mutually to touch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200180081U CN2896808Y (en) | 2006-03-23 | 2006-03-23 | Water-cooling radiating device and water cooling head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200180081U CN2896808Y (en) | 2006-03-23 | 2006-03-23 | Water-cooling radiating device and water cooling head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2896808Y true CN2896808Y (en) | 2007-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200180081U Expired - Fee Related CN2896808Y (en) | 2006-03-23 | 2006-03-23 | Water-cooling radiating device and water cooling head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2896808Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825402A (en) * | 2010-04-15 | 2010-09-08 | 镇江市东亚电子散热器有限公司 | Method for enhancing heat radiation effect of water-cooling radiator and water-cooling radiator |
| CN102660767A (en) * | 2012-05-28 | 2012-09-12 | 哈尔滨工业大学 | Cooling transitional joint for directional solidification equipment of electromagnetic cold crucible |
| CN102938549A (en) * | 2012-11-29 | 2013-02-20 | 江苏金华厦电气有限公司 | Novel energy-saving bus duct with high heat dissipation performance |
| CN101610664B (en) * | 2008-06-20 | 2014-05-14 | 萨帕铝型材（上海）有限公司 | Liquid cooler and manufacture method thereof |
| CN104850200A (en) * | 2015-05-29 | 2015-08-19 | 黑龙江大学 | Water-cooled computer and application method thereof |
| CN107748609A (en) * | 2017-11-26 | 2018-03-02 | 湖南匡楚科技有限公司 | Main frame oil injection type radiator |
| TWI623257B (en) * | 2017-01-04 | 2018-05-01 | 宏碁股份有限公司 | Heat dissipation module and manufacturing method thereof |
| CN108712848A (en) * | 2018-06-06 | 2018-10-26 | 中国电子科技集团公司第三十八研究所 | A kind of embedded jet strengthened heat-exchange radiator of rib wall punching |
| CN108871926A (en) * | 2018-07-10 | 2018-11-23 | 昆山和智电气设备有限公司 | Micro gas apparatus is extracted in a kind of new oil |
-
2006
- 2006-03-23 CN CNU2006200180081U patent/CN2896808Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101610664B (en) * | 2008-06-20 | 2014-05-14 | 萨帕铝型材（上海）有限公司 | Liquid cooler and manufacture method thereof |
| CN101825402A (en) * | 2010-04-15 | 2010-09-08 | 镇江市东亚电子散热器有限公司 | Method for enhancing heat radiation effect of water-cooling radiator and water-cooling radiator |
| CN102660767A (en) * | 2012-05-28 | 2012-09-12 | 哈尔滨工业大学 | Cooling transitional joint for directional solidification equipment of electromagnetic cold crucible |
| CN102660767B (en) * | 2012-05-28 | 2015-06-10 | 哈尔滨工业大学 | Cooling transitional joint for directional solidification equipment of electromagnetic cold crucible |
| CN102938549A (en) * | 2012-11-29 | 2013-02-20 | 江苏金华厦电气有限公司 | Novel energy-saving bus duct with high heat dissipation performance |
| CN104850200A (en) * | 2015-05-29 | 2015-08-19 | 黑龙江大学 | Water-cooled computer and application method thereof |
| TWI623257B (en) * | 2017-01-04 | 2018-05-01 | 宏碁股份有限公司 | Heat dissipation module and manufacturing method thereof |
| CN107748609A (en) * | 2017-11-26 | 2018-03-02 | 湖南匡楚科技有限公司 | Main frame oil injection type radiator |
| CN107748609B (en) * | 2017-11-26 | 2024-04-19 | 东莞市硕泰电子科技有限公司 | Oil-cooled radiator for computer host |
| CN108712848A (en) * | 2018-06-06 | 2018-10-26 | 中国电子科技集团公司第三十八研究所 | A kind of embedded jet strengthened heat-exchange radiator of rib wall punching |
| CN108871926A (en) * | 2018-07-10 | 2018-11-23 | 昆山和智电气设备有限公司 | Micro gas apparatus is extracted in a kind of new oil |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070502 |