CN102767453B - Electric gasoline injector - Google Patents
Electric gasoline injector Download PDFInfo
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- CN102767453B CN102767453B CN201210239489.9A CN201210239489A CN102767453B CN 102767453 B CN102767453 B CN 102767453B CN 201210239489 A CN201210239489 A CN 201210239489A CN 102767453 B CN102767453 B CN 102767453B
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- hole
- magnetic shield
- iron core
- electric
- bottom end
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 6
- 230000004907 flux Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000005347 demagnetization Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000005284 excitation Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses an electric gasoline injector. A magnetic shield is supported on the upper surface of an upper boss in a shell through hole by a platen, undercutting grooves are arranged on the peripheral wall of the magnetic shield, sealing rings for sealing the magnetic shield and the wall of the through hole are arranged in the undercutting grooves, the bottom end surface of the magnetic shield crosses the bottom ends surface of an iron core, a flat type valve core which is coaxial with the iron core is embedded in the through hole positioned at the lower boss, the upper end surface of the flat type valve core is supported with the bottom end surface of the magnetic shield, so that the use of a guide sleeve, a concentrating flux sleeve, a demagnetization structure and the like in the prior art can be omitted, the valve core is unnecessarily extended at a position where an electromagnetic coil is positioned and the cylindrical structure in the traditional electric gasoline injector is changed into a flat type structure, thus greatly reducing the material consumption and weight of the valve core, and being faster and more sensitive in response of the valve core under the equal electromagnetic force, also greatly simplifying the overall structure of the electric gasoline injector, and lowering the manufacturing and use cost.
Description
Technical field
The present invention relates to a kind of electric-controlled gasoline ejector, particularly a kind of electric-controlled gasoline ejector being applicable on common rail electric-controlling petrol engine fuel supply system.
Background technique
Electric-controlled gasoline ejector is the vitals of Modern Engine, Motor Vehicle for petrol engine with electric-controlled gasoline ejector have fuel injection quantity accurately, to requirements such as electric excitation signal response are fast, the applicant after further research and test of many times, finds that the structure of speed, housing and the magnetic shield etc. of existing electric-controlled gasoline ejector to electric excitation signal response, use amount and the cost etc. of material need improvements.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of electric-controlled gasoline ejector, it has structure and the more advantages of simple of whole electric-controlled gasoline ejector structure such as, housing faster to electric excitation signal speed of response, the features such as cost is low, have well solved the problem existing in the electric-controlled gasoline ejector in conventional art.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of electric-controlled gasoline ejector, it comprises housing, housing is provided with a through hole along its axis, in through hole, be shelved with the iron core that its upper end-hole is docked with oil inlet pipe, in described through hole, be provided with next-door neighbour's convex platform and lower convex platform, the through hole that is arranged in convex platform top position is provided with the end cap that is positioned at housing port from top to bottom successively, with the electromagnetic coil of coil holder and the magnetic shield made by nonmagnetic substance, iron core runs through end cap, after electromagnetic coil, be shelved on the top end of magnetic shield by the outer step in its outer wall, described magnetic shield is undertaken on the upper surface of convex platform by presenting a theatrical performance as the last item on a programme of its underpart, on the perisporium of magnetic shield, be provided with undercut groove, in undercut groove, be shelved with the seal ring of sealing magnetic shield and through hole hole wall, the bottom end of magnetic shield is crossed the bottom end of iron core, the through hole that is arranged in lower convex platform position be embedded with iron core coaxial, its upper-end surface can with the flat spool of magnetic shield bottom end butt, flat spool comprises valve body and is fixed on the steel ball of valve body bottom, valve body is the secondary ladder pipe of outer rim conical surface transition, in the blind hole on valve body top, be shelved with spring, the other end of spring is resisted against the bottom of the hollow opening spring pin that is arranged in iron core axis hole, is provided with the inclined hole that is communicated with blind hole on the conical surface of valve body, the lower position that is positioned at lower convex platform in described through hole is provided with valve seat, orifice plate and back-up ring from top to bottom successively, and steel ball is shelved in the conical surface on valve seat top.
As the improvement of technique scheme, the bottom end of described magnetic shield is crossed the bottom end 0.05 ~ 0.15mm of iron core.
As the further improvement of technique scheme, the slenderness ratio of described flat spool is 0.4 ~ 1.2.
Preferably, on the bottom end of described magnetic shield, be provided with endless belt, salient point or circumferential spaced groove and projection.
Further, described orifice plate is a circular foil member, and is provided with one or more metering-orifices along its axis.
Further, the top of described valve seat is one along the downward-sloping conical surface of axis, and the bottom of valve seat is provided with a shrinkage pool, between the bottom of the conical surface and shrinkage pool, is communicated with by via hole; The top of described back-up ring is provided with a bulge loop, and the top of bulge loop is plugged in the shrinkage pool of valve seat after placing orifice plate.
Further, described hollow opening spring pin is the metal tube that angle of circumference is less than 360 °, and there is tapering on its top.
The invention has the beneficial effects as follows: the present invention is by being undertaken on magnetic shield the upper surface of convex platform in housing through-hole by the concave station of its underpart, on the perisporium of magnetic shield, be provided with undercut groove, in undercut groove, be shelved with the seal ring of sealing magnetic shield and through hole hole wall, the bottom end of magnetic shield is crossed the bottom end of iron core, the through hole that is arranged in lower convex platform position is embedded with iron core coaxial, its upper-end surface can with the flat spool of magnetic shield bottom end butt, abandon guide pin bushing in conventional art, concentrating flux sleeve, the use of demagnetization structure etc., make spool needn't extend into electromagnetic coil position, the column structure of spool in traditional electric-controlled gasoline ejector becomes flat structure, this has reduced materials'use amount and the quality of spool greatly, make the speed of spool its response under same electrical magnetic force more responsive sooner, also simplified greatly the overall structure of electric-controlled gasoline ejector simultaneously, save material, reduce manufacturing cost and use cost.In addition, endless belt, salient point or circumferential spaced groove and projection are set on the bottom end of magnetic shield, make oil sprayer in the time that electric excitation signal declines rapidly, the flat spool of effectively having avoided causing because of the hysteresis effect phenomenon lagging behind of taking a seat, has improved frequency response characteristic and the oil spout accuracy of measuring of electric-controlled gasoline ejector greatly.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is whole-cutaway view of the present invention;
Fig. 2 is the partial enlarged drawing of A in Fig. 1;
Fig. 3 is the partial enlarged drawing of B in Fig. 2;
Fig. 4 is the cross-sectional view of middle shell of the present invention;
Fig. 5 is the cross-sectional view of flat spool in the present invention;
Fig. 6 is the plan view of Fig. 5;
Fig. 7 is the cross-sectional view of magnetic shield in the present invention;
Fig. 8 is the worm's eye view of Fig. 7 while endless belt being set on magnetic shield bottom end;
Fig. 9 is the worm's eye view of Fig. 7 while salient point being set on magnetic shield bottom end;
Figure 10 is the worm's eye view of Fig. 7 while groove and projection being set on magnetic shield bottom end;
Figure 11 is the cross-sectional view of valve seat in the present invention;
Figure 12 is the cross-sectional view of iron core in the present invention;
Figure 13 is the cross-sectional view of orifice plate in the present invention;
Figure 14 is the plan view of hollow core opening spring pin of the present invention;
Figure 15 is the plan view of Figure 14;
Figure 16 is the plan view of end cap in the present invention;
Figure 17 is the cross-sectional view of guide ring of the present invention.
Embodiment
With reference to Fig. 1 ~ Figure 17, a kind of electric-controlled gasoline ejector of the present invention, it comprises housing 1, described housing 1 is made by permeability magnetic material, housing 1 is provided with a through hole 11 along its axis, is shelved with the iron core 2 that its upper end-hole is docked with oil inlet pipe 14 in through hole 11, and there is a step 22 that adapts to oil inlet pipe 14 at the top ports place of iron core 2, after being socketed on this step 22, oil inlet pipe 14 by the connection that is welded and fixed to foreign round, in oil inlet pipe 14, can shelve a filter screen 15, in described through hole 11, be provided with next-door neighbour's convex platform 111 and lower convex platform 112, the through hole 11 that is arranged in convex platform 111 top positions be provided with successively be from top to bottom positioned at the end cap 3 of housing 1 port, with the electromagnetic coil 4 of coil holder 41 and the magnetic shield 5 of being made by nonmagnetic substance, end cap 3 is welded on the upper end-hole position of housing 1, electromagnetic coil 4 is on coil holder 41, its slotted eye 31 going between on end cap 3 is drawn and is fixed on injection casing 16, and injection casing 16 is injection-moulded in the outer wall of housing 1 and oil inlet pipe 14, iron core 2 runs through end cap 3, after electromagnetic coil 4, be shelved on the top end of magnetic shield 5 by the outer step 21 in its outer wall, described magnetic shield 5 is by 51 upper surfaces that are undertaken on convex platform 111 of presenting a theatrical performance as the last item on a programme of its underpart, on the perisporium of magnetic shield 5, be provided with undercut groove 52, in undercut groove 52, be shelved with the seal ring 6 of sealing magnetic shield 5 and through hole 11 hole walls, the setting of seal ring 6 has guaranteed that gasoline can not enter into electromagnetic coil 4, the bottom end of magnetic shield 5 is crossed the bottom end of iron core 2, preferably the bottom end of magnetic shield 5 is crossed the bottom end 0.05 ~ 0.15mm of iron core 2, as shown in C position in Fig. 3, the bottom end of magnetic shield 5, except being plane structure, also can be provided with endless belt 53, salient point 54 or circumferential spaced groove 55 and projection 56 on the bottom end of described magnetic shield 5.Fig. 8, Fig. 9 are respectively the worm's eye view of magnetic shield while endless belt 53, salient point 54 being set on the bottom end of magnetic shield 5, and Figure 10 is the worm's eye view of magnetic shield when circumferential spaced groove 55 and projection 56 are set on the bottom end of magnetic shield 5.
The through hole 11 that is arranged in lower convex platform 112 positions is embedded with iron core 2 coaxial, its upper-end surface can with the flat spool 7 of magnetic shield 5 bottom end butts, flat spool 7 comprises valve body 71 and is fixed on the steel ball 72 of valve body 71 bottoms, steel ball 72 can by welding or interference fit in the blind hole of valve body 71 bottoms, the external diameter that the upper-end surface of flat spool 7 can refer to valve body 71 upper-end surfaces with the bottom end butt of magnetic shield 5 is greater than the external diameter of iron core 2 bottom ends, when being moved up under the effect of electromagnetic force, flat valve body 7 directly do not contact with iron core 2 with magnetic shield 5 butts, the slenderness ratio of described flat spool 7 is preferably 0.4 ~ 1.2, this slenderness ratio comprises steel ball 72, if do not comprise steel ball 72, the slenderness ratio of valve body 71 is preferably 0.3 ~ 1, the cylindrical spool that is greater than 2.0 than slenderness ratio (comprising steel ball) in conventional art, flat spool 7 of the present invention is obviously shorter, this has reduced materials'use amount and the quality of spool greatly, make the speed of spool its response under same electrical magnetic force more responsive sooner, simultaneously, also no longer need to use in the present invention the concentrating flux sleeve in conventional art electric-controlled gasoline ejector, the component such as guide pin bushing, simplify greatly the overall structure of electric-controlled gasoline ejector, save material, reduce manufacturing cost and use cost.
The secondary ladder pipe that described valve body 71 is outer rim conical surface transition, in the blind hole 73 on valve body 71 tops, be shelved with spring 8, the other end of spring 8 is resisted against the bottom of the hollow opening spring pin 9 that is arranged in iron core 2 axis holes, the position of adjusting hollow opening spring pin 9 can change the pressure of spring 8 to flat spool 7, the hollow opening spring pin 9 of adjusting after spring pressure can or be welded in the axis hole of iron core 2 by interference fit, preferably described hollow opening spring pin 9 is metal tubes that angle of circumference is less than 360 °, and there is tapering on its top.On the conical surface of described valve body 71, be provided with and be communicated with the inclined hole 74 of blind hole 71, inclined hole 74 is circumferentially evenly arranged on the conical surface of valve body 71 and is preferably 4; The lower position that is positioned at lower convex platform 112 in described through hole 11 is provided with valve seat 10, orifice plate 12 and back-up ring 13 from top to bottom successively, steel ball 72 is shelved in the conical surface on valve seat 10 tops, the top of described valve seat 10 is one along the downward-sloping conical surface of axis, the bottom of valve seat 10 is provided with a shrinkage pool 101, between the bottom of the conical surface and shrinkage pool 101, is communicated with by via hole 102; The top of described back-up ring 13 is provided with a bulge loop 131, after orifice plate 12 is welded in shrinkage pool 101 bulge loop 131 be plugged in the shrinkage pool 101 of valve seat 10 and with orifice plate 12 butts, orifice plate 12 is a circular foil member, and is provided with one or more through holes 121 along its axis.
The working principle of electric-controlled gasoline ejector of the present invention is as follows: in the time that electromagnetic coil 4 does not have electric excitation signal, the steel ball 72 of flat spool 7 its bottom under the effect of spring 8 is connected in the conical surface on valve seat 10 tops and intercepts gasoline and enter into via hole 102, in the time that electromagnetic coil 4 receives electric excitation signal, electromagnetic coil 4 produces magnetic field, form from iron core 2, end cap 3, housing 1, flat spool 7, gap between magnetic shield 5 and flat spool 7 is to the magnetic loop of iron core 2, the elastic force that flat spool 7 overcomes spring 8 under the effect of electromagnetic force moves to iron core 2, the steel ball 72 of flat spool 7 bottoms lifts off a seat 10, through oil inlet pipe 14, the axis hole of iron core 2, the axis hole of hollow opening spring pin 9, gasoline after spring 8 and inclined hole 74 enters into via hole 102, and eject from the metering-orifice 121 of orifice plate 12, in the time that electric excitation signal stops, because flat spool 7 does not have directly to contact with iron core 2 with magnetic shield 5 butts of being made by nonmagnetic substance, make in the time that electric excitation signal stops, the magnetic field of electromagnetic coil 4 rapidly disappears, flat spool 7 can depart from fast magnetic shield 5 and take a seat under the effect of spring force, the flat spool 7 having caused because of hysteresis effect while effectively having avoided flat spool 5 directly to contact with iron core 2 phenomenon such as slow that lags behind of taking a seat, improve greatly the movement speed of flat spool 7, it is fast to electric excitation signal response, in addition, endless belt 53 is set on the bottom end of magnetic shield 5, salient point 54 or circumferential spaced groove 55 and projection 56, the endless belt 53 arranging on its upper-end surface and magnetic shield 5 bottom ends when flat spool 7 is moved to iron core 2 under electromagnetic force, salient point 54 or projection 56 butts, with respect to the structural type that is plane shape, reduce the area of contact of flat spool 7 with magnetic shield 5 bottom ends, thereby make oil sprayer in the time that electric excitation signal declines rapidly, the flat spool 7 of further effectively having avoided causing because of the hysteresis effect phenomenon lagging behind of taking a seat, frequency response characteristic and the oil spout accuracy of measuring of electric-controlled gasoline ejector are improved greatly.Flat spool 7 take a seat after the steel ball 72 of its bottom contact with the conical surface of valve seat 10 upper ends and form sealing state, gasoline sprays and stops.
The above, be preferred embodiments of the present invention, but the present invention is not limited to above-described embodiment, as long as it reaches technique effect of the present invention with any same or similar means, within all should falling into protection scope of the present invention.
Claims (7)
1. an electric-controlled gasoline ejector, comprise housing (1), housing (1) is provided with a through hole (11) along its axis, in through hole (11), be shelved with the iron core (2) that its upper end-hole is docked with oil inlet pipe, it is characterized in that: the convex platform (111) and the lower convex platform (112) that in described through hole (11), are provided with next-door neighbour, the through hole (11) that is arranged in convex platform (111) top position is provided with the end cap (3) that is positioned at housing (1) port from top to bottom successively, with the electromagnetic coil (4) of coil holder (41) and the magnetic shield (5) of being made by nonmagnetic substance, iron core (2) runs through end cap (3), after electromagnetic coil (4), be shelved on the top end of magnetic shield (5) by the outer step (21) in its outer wall, described magnetic shield (5) is undertaken on the upper surface of convex platform (111) by present a theatrical performance as the last item on a programme (51) of its underpart, on the perisporium of magnetic shield (5), be provided with undercut groove (52), in undercut groove (52), be shelved with the seal ring (6) of sealing magnetic shield (5) and through hole (11) hole wall, the bottom end of magnetic shield (5) is crossed the bottom end of iron core (2), the through hole (11) that is arranged in lower convex platform (112) position is embedded with iron core (2) coaxial, its upper-end surface can with the flat spool (7) of magnetic shield (5) bottom end butt, flat spool (7) comprises valve body (71) and is fixed on the steel ball (72) of valve body (71) bottom, valve body (71) is the secondary ladder pipe of outer rim conical surface transition, in the blind hole (73) on valve body (71) top, be shelved with spring (8), the other end of spring (8) is resisted against the bottom of the hollow opening spring pin (9) that is arranged in iron core (2) axis hole, on the conical surface of valve body (71), be provided with the inclined hole (74) that is communicated with blind hole (71), the lower position that is positioned at lower convex platform (112) in described through hole (11) is provided with valve seat (10), orifice plate (12) and back-up ring (13) from top to bottom successively, and steel ball (72) is shelved in the conical surface on valve seat (10) top.
2. a kind of electric-controlled gasoline ejector according to claim 1, is characterized in that: the bottom end of described magnetic shield (5) is crossed the bottom end 0.05～0.15mm of iron core (2).
3. a kind of electric-controlled gasoline ejector according to claim 1, is characterized in that: the slenderness ratio of described flat spool (7) is 0.4～1.2.
4. according to a kind of electric-controlled gasoline ejector described in any one in claim 1～3, it is characterized in that: on the bottom end of described magnetic shield (5), be provided with endless belt (53), salient point (54) or circumferential spaced groove (55) and projection (56).
5. a kind of electric-controlled gasoline ejector according to claim 4, is characterized in that: described orifice plate (12) is a circular foil member, and is provided with one or more metering-orifices (121) along its axis.
6. a kind of electric-controlled gasoline ejector according to claim 4, it is characterized in that: the top of described valve seat (10) is one along the downward-sloping conical surface of axis, the bottom of valve seat (10) is provided with a shrinkage pool (101), between the bottom of the conical surface and shrinkage pool (101), is communicated with by via hole (102); The top of described back-up ring (13) is provided with a bulge loop (131), and the top of bulge loop (131) is plugged in the shrinkage pool (101) of valve seat (10) after placing orifice plate (12).
7. a kind of electric-controlled gasoline ejector according to claim 4, is characterized in that: described hollow opening spring pin (9) is the metal tube that angle of circumference is less than 360 °, and there is tapering on its top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210239489.9A CN102767453B (en) | 2012-07-11 | 2012-07-11 | Electric gasoline injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210239489.9A CN102767453B (en) | 2012-07-11 | 2012-07-11 | Electric gasoline injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102767453A CN102767453A (en) | 2012-11-07 |
| CN102767453B true CN102767453B (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210239489.9A Active CN102767453B (en) | 2012-07-11 | 2012-07-11 | Electric gasoline injector |
Country Status (1)
| Country | Link |
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| CN (1) | CN102767453B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152360A (en) * | 2017-07-03 | 2017-09-12 | 东莞市盈森汽车电喷科技有限公司 | High-performance fuel injector |
| CN107387282A (en) * | 2017-08-25 | 2017-11-24 | 温州德尔福机车部件有限公司 | Gasoline ejector |
| KR102260757B1 (en) * | 2019-12-27 | 2021-06-07 | 주식회사 현대케피코 | Fixing structure for needle ball of injector |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039888A (en) * | 1988-07-23 | 1990-02-21 | 罗伯特-博希股份公司 | Solenoid valve |
| JP2006083861A (en) * | 2004-09-13 | 2006-03-30 | Hyundai Motor Co Ltd | Fuel injection device |
| CN101050744A (en) * | 2006-04-03 | 2007-10-10 | 柳州华威电控燃油喷射***技术有限公司 | Electric control gasoline injector |
| CN101294531A (en) * | 2007-04-24 | 2008-10-29 | 柳州华威电控技术有限公司 | Electric-controlled gasoline ejector |
| CN202746074U (en) * | 2012-07-11 | 2013-02-20 | 江门市威宇***技术有限公司 | Electric-control gasoline injector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5389560B2 (en) * | 2009-07-23 | 2014-01-15 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
-
2012
- 2012-07-11 CN CN201210239489.9A patent/CN102767453B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039888A (en) * | 1988-07-23 | 1990-02-21 | 罗伯特-博希股份公司 | Solenoid valve |
| JP2006083861A (en) * | 2004-09-13 | 2006-03-30 | Hyundai Motor Co Ltd | Fuel injection device |
| CN101050744A (en) * | 2006-04-03 | 2007-10-10 | 柳州华威电控燃油喷射***技术有限公司 | Electric control gasoline injector |
| CN101294531A (en) * | 2007-04-24 | 2008-10-29 | 柳州华威电控技术有限公司 | Electric-controlled gasoline ejector |
| CN202746074U (en) * | 2012-07-11 | 2013-02-20 | 江门市威宇***技术有限公司 | Electric-control gasoline injector |
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| CN102767453A (en) | 2012-11-07 |
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Effective date of registration: 20200407 Address after: Will the West Road hi tech industrial village main workshop 529100 in Guangdong province Jiangmen City Xinhui District Patentee after: Guangdong Peiyu System Technology Co.,Ltd. Address before: 529100 Guangdong Province, Jiangmen City Xinhui District Simon Road, hi tech Industrial Village Patentee before: JIANGMEN WEIYU SYSTEM TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20240531 Address after: No. 11, North An North Road, Huicheng, Xinhui District, Jiangmen City, Guangdong Province, 529000 Patentee after: Guangdong Hanyu new energy equipment Co.,Ltd. Country or region after: China Address before: 529100 main workshop of Guifeng hi tech Industrial Village, Ximen Road, Huicheng, Xinhui District, Jiangmen City, Guangdong Province Patentee before: Guangdong Peiyu System Technology Co.,Ltd. Country or region before: China |