CN101672383A - Directly operated and pilot operated hybrid multi-connection solenoid valve - Google Patents
Directly operated and pilot operated hybrid multi-connection solenoid valve Download PDFInfo
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- CN101672383A CN101672383A CN200810120497A CN200810120497A CN101672383A CN 101672383 A CN101672383 A CN 101672383A CN 200810120497 A CN200810120497 A CN 200810120497A CN 200810120497 A CN200810120497 A CN 200810120497A CN 101672383 A CN101672383 A CN 101672383A
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Abstract
The invention discloses a directly operated and pilot operated hybrid multi-connection solenoid valve. At least one pilot operated valve is arranged on the valve body; the pilot operated valve is provided with a main valve seat A; the main valve seat A is provided with a valve gate A consisting of a membrane plate A and a membrane A; the upper part of the membrane plate A is provided with a guidehole and the periphery of the membrane plate A is provided with side holes; a conduit A is arranged in a backpressure chamber A of the valve body; a piston A is arranged in the conduit; the lower endof the conduit A is fastened to the periphery of the membrane A; and an electromagnetic coil A is arranged on the periphery of the conduit A. At least one directly operated valve is arranged on the valve body, and is provided with a main valve seat B; the main valve seat B is provided with a valve gate B consisting of a membrane plate B and a membrane B; the membrane B is provided with a special hole; the middle of the membrane plate B is provided with a guide hole; a conduit B is arranged in a backpressure chamber B of the valve body; a piston B is arranged in the conduit; a protrusion structure contacted with the lower end of the conduit B is arranged on the membrane plate B; the valve gate B is positioned on the main valve seat B; and the valve gate B corresponding to the main valve seat B is closed. The directly operated and pilot operated hybrid multi-connection solenoid valve is applied to an electromagnetic water feeding valve of an electric washing machine.
Description
Technical field
The present invention relates to solenoid valve, particularly be fitted to the electromagnet water supply valve of electrical washing machine.
Background technique
In the past, the structure of guiding electromagnet water supply valve is, in the valve body of forming by inflow entrance, water supply chamber, main valve seat, delivery chamber and outflow opening, be provided with the barrier film A and the diaphragm plate A that close main valve seat, have bullport on the diaphragm plate A, the conduit of the piston that the dress permeability magnetic material is made in being provided with, piston nose is provided with the bullport of piston cap corresponding to diaphragm plate A, piston rear end is provided with spring, and the periphery of conduit is provided with electromagnetic coil, so that the bullport of diaphragm plate A can be opened or close by piston; Conduit lower end radially expanding part presses the sealed department of described barrier film A periphery, conduit is fixed on the described valve body by flat bracket, is the guiding electromagnet water supply valve of 200320101847.6 model utility and the electromagnet water supply valve of Japanese kokai publication hei 1-220677 communique report as: the patent No..
Above-mentioned disclosed electromagnet water supply valve, switching by diaphragm plate A bullport makes feed valve back pressure chamber and water supply chamber produce variation in pressure, the valve A that diaphragm plate A and barrier film A are formed opens, and directly connects delivery chamber below the water supply chamber of valve body, and fluid is through main valve seat, delivery chamber, outflow opening discharge.
The water inlet of this guiding electromagnet water supply valve (stream is open-minded) action is as follows: the electromagnetic coil energising, attraction is located at the piston in the conduit, the bullport that drives piston cap disengaging diaphragm plate A is opened bullport, the fluid of water supply chamber (water) is gone into (back pressure chamber) in the conduit from the other orifice flow of diaphragm plate A, flows out by the bullport of diaphragm plate A, the delivery chamber and the outflow opening of feed valve in succession again.This path one is open-minded, pressure in the back pressure chamber descends rapidly, when the active force of hydraulic pressure in the water supply chamber greater than back pressure chamber in during the active force of hydraulic pressure, barrier film A and diaphragm plate A break away from from main valve seat A, valve A opens, and the major part of fluid flows out by flow dontroller, the outflow opening A of water supply chamber A, main valve seat A, the A of delivery chamber.
The sealing of this guiding electromagnet water supply valve (stream is closed) action is as follows: the electromagnetic coil outage, and by being located at the elastic force of conduit inner spring, make piston drive the piston cap return, block the bullport of diaphragm plate A.The fluid of going in the conduit (back pressure chamber) from the other orifice flow of diaphragm plate A can't flow out from bullport, pressure in the back pressure chamber rises rapidly, when the active force of water in the back pressure chamber when flowing into indoor active force, the barrier film A and the diaphragm plate A that break away from from main valve seat A are pushed back to main valve seat A, valve A closes.
Along with growth in the living standard, washing machine begins to develop to multi-functional, many notions direction, towards functions such as Softness Agent, automatic oven dry, occur having in the same feed valve technology and the product of a plurality of flowing water Valves as automatically thus, the flow accuracy of each valve requires to have nothing in common with each other.The washing machine master intake requires big flow, to the requirement of the small accurate flow of then having of drying function (500cc/min) control.For the guiding feed valve, when feed valve is opened, the tiny flow quantity control side is too little because of flow, the barrier film amount of lifting also can be very little, and the gap of barrier film and main valve seat is very little, gets off for a long time, a lot of fine impurities in the tap water will be stuck in main valve seat or stick on the barrier film, during electromagnetic coil when outage throttle down, barrier film can not with valve base sealing, cause leaking under the non-energising situation.
On the other hand, big influence can not take place to the flow controlling unit of the big flow of feed valve in the impurity in the tap water, and to the flow dontroller of precision control, fine impurities can accumulate in the controller, the flow path area of controller can change, slowly influence the precision of flow dontroller, until the choked flow amount controller and not water outlet.Connect flow that feed valve water inlet oral-lateral can influence big flow side if the detailed catalogue filter screen directly is contained in more, increase the flooding time of washing machine; Washing machine can increase the frequency of cleaning and filtering net simultaneously, reduces the working life of detailed catalogue filter screen.
Summary of the invention
The guiding that the present invention will solve the tool micrometeor control function in the prior art connects electromagnet water supply valve main valve seat under non-energising situation more and leaks easily, and easily causes blocking problem on the micrometeor controller, and a kind of feed valve of the present invention is provided for this reason.
For addressing the above problem, the technical solution used in the present invention is to be provided with valve body, valve body is provided with inflow entrance, water supply chamber and at least one pilot valve, described pilot valve has main valve seat A, A of delivery chamber and outflow opening A, be combined with the valve A that constitutes by diaphragm plate A and barrier film A on the main valve seat A, diaphragm plate A wears the convex body top that is embedded in barrier film A center hole and has opened a bullport, diaphragm plate A wears and has opened other hole on the convex body that is embedded in barrier film A one periphery hole, be provided with conduit A in the valve body back pressure chamber A, be provided with piston A in this conduit A, piston A front end is worn and is embedded with the described bullport of piston cap A corresponding to diaphragm plate A, there is spring on top, piston A rear end, withhold in the sealed department of barrier film A periphery the lower end that described conduit A radially extends out, and conduit A periphery is provided with the electromagnetic coil A of tool tenminal block;
Its special way is that described valve body is provided with at least one direct-acting valve, described direct-acting valve has main valve seat B, B of delivery chamber and outflow opening B, be combined with the valve B that constitutes by diaphragm plate B and barrier film B on the main valve seat B, have irregularly-shaped hole on the barrier film B, have bullport on the diaphragm plate B center protrusion, the cross-section area of the bullport of the gross area of described irregularly-shaped hole on the diaphragm plate B center protrusion, described valve body also has the back pressure chamber B corresponding with described direct-acting valve, be provided with conduit B in the back pressure chamber B, be provided with piston B in this conduit B, piston B front end is worn and is embedded with piston cap B, bullport on the described diaphragm plate B center protrusion and piston cap B form control valve, diaphragm plate B is provided with raised structures, end in contact under this raised structures and the conduit B, valve B is positioned on the main valve seat B, and this main valve seat B corresponding valve B is closed, and is only controlled the open and close in water route by described control valve.
Among the present invention, described diaphragm plate B and on raised structures can be disjunctor and become an one-piece element, also can be two separate parts of split; Described main valve seat B directly contacts with diaphragm plate B or barrier film B.
Among the present invention, can between the diaphragm plate B of described valve B and barrier film B, be provided with the filter screen of little order number, be provided with the tiny flow quantity control unit that constitutes by flow circle and traffic controller in the B of delivery chamber of valve body.
Among the present invention, described diaphragm plate B can seal with sealed member.
Thick order filter screen can be set in the water intake among the present invention, and both filtrations have guaranteed the big flow that pilot valve can be exported again; Among the present invention, tiny flow quantity adopts the control of direct-acting type valve, current are not by main valve seat B (having solved flow makes foreign matter be stuck in problem on main valve seat B and the barrier film B for a short time), if the present invention of detailed catalogue filter screen, can be after the fine impurities in the filter tap water, enter the tiny flow quantity controller again, realize the purpose of the accurate control of flow.
Description of drawings
Fig. 1 is the multi-connection solenoid valve embodiment's one of direct-acting type of the present invention and leading type mixing a structural representation;
Fig. 2 is the multi-connection solenoid valve embodiment's one of direct-acting type of the present invention and leading type mixing an another structural representation;
Fig. 3 is the multi-connection solenoid valve embodiment's two of direct-acting type of the present invention and leading type mixing a structural representation;
Fig. 4 is the multi-connection solenoid valve embodiment's three of direct-acting type of the present invention and leading type mixing a structural representation;
Fig. 5 is the multi-connection solenoid valve embodiment's four of direct-acting type of the present invention and leading type mixing a structural representation;
Fig. 6 is the multi-connection solenoid valve embodiment's four of direct-acting type of the present invention and leading type mixing an another structural representation;
Fig. 7 is the local structure for amplifying schematic representation that comprises valve A in the embodiments of the invention one;
Fig. 8 is the local structure for amplifying schematic representation of the direct-acting valve door that comprises valve B and control valve in the embodiments of the invention one;
Fig. 9 is the radial section figure of the tiny flow quantity control unit in the embodiments of the invention three;
Figure 10 a is the stereogram of the barrier film A among the present invention;
Figure 10 b is the radially sectional view of the barrier film A among the present invention;
Figure 10 c is the radial section figure of spendable other shapes of transition structure of the barrier film A among the present invention;
Figure 11 a is the sectional drawing of the valve B among the present invention;
Figure 11 b is the sectional drawing of the spendable shape of valve B among the present invention;
Figure 12 a be among the present invention with raised structures be the plan view of the diaphragm plate B of an one-piece element;
Figure 12 b be among the present invention with raised structures be the radial section figure of the diaphragm plate B of an one-piece element;
Figure 12 c be among the present invention with raised structures be the radial section figure of the spendable shape of diaphragm plate B of an one-piece element;
Figure 13 a be among the present invention with raised structures be the stereogram of the diaphragm plate B of two separate parts;
Figure 13 b be among the present invention with raised structures be the explosive view of the diaphragm plate B of two separate parts;
Figure 14 a is the plan view of the barrier film B among the present invention;
Figure 14 b is the radial section figure of the barrier film B among the present invention;
Figure 143 c is the plan view of the spendable shape of barrier film B among the present invention;
Figure 14 d is the radial section figure of the spendable shape of barrier film B among the present invention;
Figure 15 a is the stereogram of the detailed catalogue filter screen among the present invention;
Figure 15 b is the plan view of the detailed catalogue filter screen among the present invention;
Figure 16 is the partial structurtes enlarged diagram that comprises the detailed catalogue filter screen among the present invention.
Be labeled as among the figure: 1 valve body, 101 inflow entrances, 102 water supply chambers, 103 main valve seat A, 104 main valve seat B, 105 A of delivery chamber, 106 B of delivery chamber, 107 outflow opening A, 108 outflow opening B, 109A back pressure chamber A, 109B back pressure chamber B, 2 diaphragm plate A, 21 diaphragm plate A bullports, the other hole of 22 diaphragm plate A, 3 barrier film A, 31 barrier film A periphery sealed departments, 32 transition structures, 33 periphery holes, 41 diaphragm plate B, 411 diaphragm plate B bullports, 412 raised structures, 413 diaphragm plate B irregularly-shaped holes, 414 radial protrusions, 42 barrier film B, 421 barrier film B periphery sealed departments, 422 barrier film B irregularly-shaped holes, 43 detailed catalogue filter screens, 44 sealed members, 5A conduit A, 5B conduit B, 6A piston A, 6B piston B, 7A piston cap A, 7B piston cap B, 8 springs, 9 tiny flow quantity control units, 91 flow circles, 92 traffic controllers, 10A electromagnetic coil A, 10B electromagnetic coil B, 11 thick order filter screens, 12 main flow control units, 13 valve A, 14 valve B, 15 control valves, 16 direct-acting valve doors.
Embodiment
Embodiment one
The multi-connection solenoid valve that the direct-acting type of present embodiment and leading type mix, see Fig. 1, Fig. 2, Fig. 7, Fig. 8, Figure 10 a, Figure 10 b, Figure 10 c, Figure 12 a, Figure 12 b, Figure 14 a, comprise valve body 1, valve body is provided with inflow entrance 101, water supply chamber 102, at least one pilot valve, pilot valve has main valve seat A103, delivery chamber A105 and the outflow opening A107 corresponding with main valve seat A, be combined with the valve A13 that constitutes by diaphragm plate A2 and barrier film A3 on the main valve seat A103, diaphragm plate A2 wears the convex body top that is embedded in barrier film A3 center hole and has opened a bullport 21, diaphragm plate A2 wears and has opened other hole 22 on the convex body that is embedded in barrier film A3 one periphery hole 33, be provided with conduit A5A in the valve body back pressure chamber A109A, be provided with piston A6A in it, piston A front end is worn and is embedded with the bullport 21 that piston cap A7A presses on diaphragm plate A2, there is spring 8 on top, piston A rear end, withhold in the sealed department 31 of barrier film A periphery the lower end that conduit A radially extends out, and conduit A periphery is provided with the electromagnetic coil A10A of tool tenminal block; Valve body (1) is provided with at least one direct-acting valve (4), described direct-acting valve has main valve seat B (104), B of delivery chamber (106) and outflow opening B (108), be combined with the valve B (14) that constitutes by diaphragm plate B (41) and barrier film B (42) on the main valve seat B (104), have irregularly-shaped hole (422) on the barrier film B (42), have bullport (411) on diaphragm plate B (41) center protrusion, the cross-section area of the bullport (411) of the gross area of described irregularly-shaped hole (422) on diaphragm plate B (41) center protrusion, described valve body (1) also has the back pressure chamber B (109B) corresponding with described direct-acting valve, be provided with conduit B (5B) in the back pressure chamber B, be provided with piston B (6B) in this conduit B, piston B front end is worn and is embedded with piston cap B (7B), bullport (411) on the described diaphragm plate B center protrusion and piston cap B form control valve (15), diaphragm plate B (41) is provided with raised structures (412), end in contact under this raised structures and the conduit B, valve B (14) is positioned on the main valve seat B (104), this main valve seat B (104) corresponding valve B (14) is closed, only control the open and close in water route by described control valve (15).
The transition structure 32 of barrier film A3 radially is an arc or square in barrier film, can carry out according to user's needs freely selecting.
The unlatching of the pilot valve of this hybrid multi-connection solenoid valve (stream is opened water inlet) and close (stream is closed and cut off the water supply) action as in the past leading type inlet valve.
Direct-acting valve water inlet (stream the is open-minded) action of this hybrid multi-connection solenoid valve is as follows: electromagnetic coil B10B energising, attraction is located at the piston B6B in the conduit B5B, drive the bullport 411 that piston cap B7B breaks away from diaphragm plate B, control valve 15 is opened, owing to have end in contact under raised structures 412 and the conduit B above the diaphragm plate B41, barrier film B42 contacts with main valve seat B104 all the time, corresponding valve B14 closes, the fluid of water supply chamber 102 (water) can only flow into back pressure chamber B109B through the irregularly-shaped hole 413 of diaphragm plate B and the irregularly-shaped hole 422 of barrier film B, again by behind the bullport 411 of diaphragm plate B, flow out to outflow opening B108 via the B106 of delivery chamber.
Because the bullport 411 of diaphragm plate B is processed smallerly, is far smaller than the bore of outflow opening B108, flow can be reduced to after by bullport 411 restrictions of diaphragm plate B very little, thereby realizes reducing the control of flow.
Direct-acting valve door holder water (stream is closed) action of this multi-connection solenoid valve is as follows: electromagnetic coil B10B outage, by being located at the elastic force of conduit B5B inner spring, make piston B6B drive piston cap B7B return, block the bullport 411 of diaphragm plate B, control valve 15 is closed.The fluid that flows in the back pressure chamber B109B from barrier film B irregularly-shaped hole 422, diaphragm plate B irregularly-shaped hole 413 can't flow out diaphragm plate B bullport 411, and direct-acting valve cuts out.
Direct-acting valve in this multi-connection solenoid valve, solved in the past the leading type feed valve causes leaking under the coil blackout state on the main valve seat because of foreign matter is stuck in, simultaneously current are through the bullport water outlet of diaphragm plate, when hydraulic pressure at 0.02～0.8MPa, guarantee that flow can be controlled at below the 1L/min.
Embodiment two
The multi-connection solenoid valve that the direct-acting type of present embodiment and leading type mix is seen Fig. 3, Figure 11, Figure 12 c, Figure 13 a, Figure 13 b, and present embodiment is different from being of embodiment one: described diaphragm plate B41 and raised structures 412 can be holistic parts; Also can be two independent parts.End in contact is positioned on the main valve seat B104 barrier film B42 under raised structures 412 on the described diaphragm plate B41 and the conduit B5B; Also can be that end in contact is positioned on the main valve seat B104 radial protrusion 414 of diaphragm plate B41 under raised structures 412 and the conduit B on the diaphragm plate B41.
Present embodiment is compared with embodiment one, because the structure difference of diaphragm plate B41 causes its manufacturing process different, in concrete practice, the user can make one's options as required.
Embodiment three
The multi-connection solenoid valve that the direct-acting type of present embodiment and leading type mix, see Fig. 4, Fig. 9, Figure 12 a, Figure 14 a, Figure 16, based on embodiment one, the multi-connection solenoid valve that this direct-acting type and leading type mix, delivery chamber B106 bottom at main valve seat B104 is provided with the tiny flow quantity control unit of being made up of flow circle 91 and traffic controller 92 9, the tiny flow quantity controlled water flow is through water supply chamber 102, the irregularly-shaped hole 413 in the diaphragm plate B41 outside, detailed catalogue filter screen 43, barrier film B irregularly-shaped hole 422 enters back pressure chamber B109B, and be in connected state all the time, end in contact under diaphragm plate B41 upper process structure 412 and the conduit B5B, the assembly parts of diaphragm plate B41 and barrier film B42 is positioned on the main valve seat B104, make valve B14 be in closed condition all the time, when electromagnetic coil B10B switches on, piston B6B is attracted drive piston cap B7B and opens diaphragm plate B41 center bullport 411, and the current after detailed catalogue filter screen 43 filters are through control valve 15, tiny flow quantity control unit 9 in the B106 of delivery chamber, outflow opening B108 flows out.
Owing between diaphragm plate B41 and barrier film B42, detailed catalogue filter screen 43 is set, even the foreign matter in the water enters in the solenoid valve, detailed catalogue filter screen 43 can intercept the foreign matter in the water in the water supply chamber 102 of solenoid valve, can not cause the stream blocking problem to the tiny flow quantity control unit 9 of precision control.
Tiny flow quantity control unit 9 can accurately the flow by diaphragm plate B41 center bullport 411 further be limited in the more accurate scope (such as: 0.5 ± 0.1L/min).Tiny flow quantity control unit 9 has the function that adjusts the water yield in the certain limit automatically simultaneously; When the hydraulic pressure in the B106 of delivery chamber was big, rubber-like flow circle 91 was pressed on the traffic controller 92, because hydraulic pressure is big more, and the deformation extent super large of flow circle 91, promptly the slit between flow circle 91 and the traffic controller 92 is more little; Hydraulic pressure in the B of delivery chamber hour, the deformation extent of flow circle 91 is less, is that the slit between flow circle 91 and the traffic controller 92 is big more; Thereby with the flow restriction of outflow opening B in more accurate scope.
Embodiment four
The multi-connection solenoid valve that the direct-acting type of present embodiment and leading type mix, see Fig. 5, Fig. 6, end in contact is pressed on the main valve seat 103 radial protrusion 414 of diaphragm plate B41 under described diaphragm plate B41 upper process structure 412 (referring to Figure 12 b) and the conduit B5B, adopt sealed member 44 to carry out double seal, even the part leakage phenomenon appears in valve B14, also can seal once more by sealed member 44, guarantee flow accuracy control.Other structures are with embodiment one.
Claims (4)
1, the multi-connection solenoid valve that direct-acting type and leading type mix, comprise set valve body (1), valve body (1) is provided with inflow entrance (101), water supply chamber (102) and at least one pilot valve, described pilot valve has main valve seat A (103), A of delivery chamber (105) and outflow opening A (107), be combined with the valve A (13) that constitutes by diaphragm plate A (2) and barrier film A (3) on the main valve seat A (103), diaphragm plate A (2) wears the convex body top that is embedded in barrier film A (3) center hole and has opened a bullport (21), diaphragm plate A (2) wears and has opened other hole (22) on the convex body that is embedded in barrier film A (3) one periphery holes (33), be provided with conduit A (5A) in the valve body back pressure chamber A (109A), be provided with piston A (6A) in this conduit A, piston A front end is worn and is embedded with the described bullport (21) of piston cap A (7A) corresponding to diaphragm plate A (2), there is spring (8) on top, piston A rear end, the sealed department (31) in barrier film A periphery is withheld in the lower end that described conduit A radially extends out, and conduit A periphery is provided with the electromagnetic coil A (10A) of tool tenminal block; It is characterized in that described valve body (1) is provided with at least one direct-acting valve (4), described direct-acting valve has main valve seat B (104), B of delivery chamber (106) and outflow opening B (108), be combined with the valve B (14) that constitutes by diaphragm plate B (41) and barrier film B (42) on the main valve seat B (104), have irregularly-shaped hole (422) on the barrier film B (42), have bullport (411) on diaphragm plate B (41) center protrusion, the cross-section area of the bullport (411) of the gross area of described irregularly-shaped hole (422) on diaphragm plate B (41) center protrusion, described valve body (1) also has the back pressure chamber B (109B) corresponding with described direct-acting valve, be provided with conduit B (5B) in the back pressure chamber B, be provided with piston B (6B) in this conduit B, piston B front end is worn and is embedded with piston cap B (7B), bullport (411) on the described diaphragm plate B center protrusion and piston cap B form control valve (15), diaphragm plate B (41) is provided with raised structures (412), end in contact under this raised structures and the conduit B, valve B (14) is positioned on the main valve seat B (104), this main valve seat B (104) corresponding valve B (14) is closed, only control the open and close in water route by described control valve (15).
2, the multi-connection solenoid valve that mixes of direct-acting type as claimed in claim 1 and leading type, it is characterized in that described diaphragm plate B (41) and on raised structures (412) become two separate parts of one-piece element or split for disjunctor; Described main valve seat B (104) directly contacts with diaphragm plate B (41) or barrier film B (42).
3, the multi-connection solenoid valve of direct-acting type as claimed in claim 1 or 2 and leading type mixing, it is characterized in that being provided with between the diaphragm plate B (41) of described valve B (14) and the barrier film B (42) filter screen (43) of little order number, be provided with the tiny flow quantity control unit (9) that constitutes by flow circle (91) and traffic controller (92) in the B of delivery chamber (106) of valve body (1).
4, the multi-connection solenoid valve of direct-acting type as claimed in claim 1 or 2 and leading type mixing is characterized in that described diaphragm plate B (41) seals with sealed member (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101204975A CN101672383B (en) | 2008-09-08 | 2008-09-08 | Directly operated and pilot operated hybrid multi-connection solenoid valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101204975A CN101672383B (en) | 2008-09-08 | 2008-09-08 | Directly operated and pilot operated hybrid multi-connection solenoid valve |
Publications (2)
| Publication Number | Publication Date |
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| CN101672383A true CN101672383A (en) | 2010-03-17 |
| CN101672383B CN101672383B (en) | 2011-07-27 |
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| CN2008101204975A Active CN101672383B (en) | 2008-09-08 | 2008-09-08 | Directly operated and pilot operated hybrid multi-connection solenoid valve |
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Effective date of registration: 20221012 Address after: 230000 Hefei Shenlin Electronics Co., Ltd., No. 68, Tiandu Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: Hefei Shenlin Electronics Co.,Ltd. Address before: 310018, No. 1, No. 8, No. 7, Hangzhou economic and Technological Development Zone, Zhejiang, China Patentee before: HANGZHOU KAMBAYASHI ELECTRONICS Co.,Ltd. |
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