CN107514465B - Guide electromagnetic valve - Google Patents
Guide electromagnetic valve Download PDFInfo
- Publication number
- CN107514465B CN107514465B CN201610437514.2A CN201610437514A CN107514465B CN 107514465 B CN107514465 B CN 107514465B CN 201610437514 A CN201610437514 A CN 201610437514A CN 107514465 B CN107514465 B CN 107514465B
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- Prior art keywords
- valve
- guide
- pilot
- main
- main valve
- 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.)
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- 238000007789 sealing Methods 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000012530 fluid Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004941 influx Effects 0.000 description 2
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical group C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
- F16K31/406—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The present invention relates to control valve technical fields, a kind of guide electromagnetic valve is specifically disclosed, it include: valve body of main valve component, pilot valve valve part and pilot valve driving part, the valve body of main valve component includes the main valve body equipped with main valve chamber, is provided with primary valve and main valve plug in the main valve chamber；The pilot valve valve part includes the guide valve blocks for being provided with guide's valve chamber, the pilot valve is intracavitary to be provided with poppet port, guide's valve chamber is connected to the main valve chamber, it is characterized in that, the pilot valve valve part further includes connecting section, the connecting section has pilot passage, the poppet port is connected to by the pilot passage with Main valve outlet channel, the main valve plug is to be set in the connecting section and can slide axially to control the opening/closing cyclic annular spool of the primary valve, guide electromagnetic valve provided by the invention, the stroke of main valve plug is not restricted by pilot valve stroke, simplify product structure.
Description
Technical field
The present invention relates to control valve technical fields, and in particular to a kind of guide electromagnetic valve.
Background technique
The use of guide electromagnetic valve product is generally used for opening or closing for control big flow medium than wide.Fig. 1 is
A kind of structural schematic diagram of the guide electromagnetic valve of the prior art.
The guide electromagnetic valve includes valve part 100 and pilot valve components 200.It is welded on the ontology of valve part 100
Intake channel 201 and exit passageway 202.204 and of dynamic iron core that pilot valve components 200 include sleeve 206, are arranged in sleeve 206
Static iron core 205 is equipped with pilot valve 203 in the front end of dynamic iron core 204.Valve part 100 and the closed welding of pilot valve components 200.
Piston element 103 is slidably disposed in valve chamber.
When electromagnetic coil in the power-off state, pilot valve 203 closes the valve port of pilot valve under spring force.Import
The high-pressure fluid medium of adapter tube 201 is flowed into the pilot valve valve chamber 201 on top and keeps high pressure, and piston element 100 is in fluid pressure
Valve port of main valve is abutted under the action of power difference, is in close state guide electromagnetic valve；When the electromagnetic coil of guide electromagnetic valve
When energization, pilot valve 203 overcomes spring force resistance to open the valve port of pilot valve under magnetic field force effect.In the valve chamber 201 of pilot valve
High-pressure medium flowed out by the valve port of pilot valve, since the aperture circulation area on piston is less than the circulation area of pilot valve valve port,
So fluid media (medium) number of dropouts is greater than influx in the valve chamber 201 of pilot valve, the pressure of valve chamber 201 is less than the stream of entrance sleeve 201
Body pressure, piston element 103 open the valve port of main valve under the action of fluid pressure differential, are in guide electromagnetic valve and open
State.
But the pilot-operated type flow control valve of the above prior art is in applying to the biggish control system of flow, it is desirable that
The aperture (A) of valve port becomes larger, and the stroke (L) of corresponding pilot valve also requires to become larger, often because electromagnetic force deficiency can move product
It is impacted as performance, declines properties of product.To solve the above-mentioned problems, can generally consider main valve stroke and pilot valve stroke
Isolated mode designs, i.e., is designed by the way of bypass low-pressure channel as shown in Figure 2, reaches and reduces pilot valve stroke
Purpose.But by way of the structure is erecting valve part, the circumferential slot of transverse holes and outer circle is processed, product
Craftsmanship is bad and the runner of design is complicated, product reliability decline.
So how to improve the structure design of guide electromagnetic valve, the functional reliability of product is improved, is art technology
Personnel's problem to be solved.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of improved guide electromagnetic valves, comprising: valve body of main valve component, institute
Stating valve body of main valve component includes the main valve body equipped with main valve chamber, is provided with primary valve and main valve plug in the main valve chamber, main valve into
Mouth channel is connected to the main valve chamber, and Main valve outlet channel is connected to the primary valve；Pilot valve valve part, the pilot valve valve body
Component includes the guide valve blocks equipped with guide's valve chamber, and the pilot valve is intracavitary to be provided with poppet port, guide's valve chamber and institute
State main valve chamber connection；Pilot valve driving part, the pilot valve driving part includes pilot valve, and the pilot valve extend into described
Pilot valve is intracavitary to control the opening/closing of the poppet port；Valve deck, the valve deck and the main valve body cooperate with the closed main valve
Chamber；The pilot valve valve part further includes connecting section, and the connecting section has pilot passage, and the poppet port passes through institute
Pilot passage is stated to be connected to the Main valve outlet channel, the main valve plug be set in the connecting section and can slide axially with
Control the opening/closing cyclic annular spool of the primary valve.
Connecting section is arranged on pilot valve valve part in guide electromagnetic valve provided by the invention, by by cricoid master
Spool is set in connecting section, and main valve body and pilot valve valve body are relatively fixed, and main valve plug opposite can slide, so main valve plug
Stroke is not restricted by pilot valve stroke, when applying in the biggish control system of flow, can have enough unlatchings to go
Journey simplifies product structure to use lesser driving force to reach biggish stroke, energy saving.
On the basis of above technical scheme, extend as further technology, the main valve plug and the connecting section it
Between be provided with sealing element；
Further, the spring by the main valve plug against the primary valve is additionally provided in the main valve chamber；
Further, the outer diameter (D1) of the connecting section is less than the aperture (D2) of the primary valve；
Further, the connecting section extends in the primary valve；
Further, the pilot passage include the path section being connected to the poppet port and with the Main valve outlet channel
The major diameter section of connection；
Further, the valve deck and the guide valve blocks are integrally formed；
Further, connecting section and the guide valve blocks are integrally formed；
In the further technical solution that the present invention provides, product can be made to add pilot valve driving part design optimization
Tooling is with simply, and craftsmanship is strong, and performance is guaranteed.
Detailed description of the invention
A kind of Fig. 1: structural schematic diagram of the guide electromagnetic valve of the prior art；
Fig. 2: the structural schematic diagram of the guide electromagnetic valve of another prior art；
A kind of Fig. 3 A: the structural schematic diagram of guide electromagnetic valve that the present invention provides when closed；
The structural schematic diagram of guide electromagnetic valve in the on-state in B: Fig. 3 A of Fig. 3；
The structural schematic diagram of the guide valve blocks of guide electromagnetic valve in Fig. 4: Fig. 3 A；
The structural schematic diagram of the cyclic annular main valve plug of guide electromagnetic valve in Fig. 5: Fig. 3 A；
The structural schematic diagram of the main valve body of guide electromagnetic valve in Fig. 6: Fig. 3 A；
Fig. 7: the structural schematic diagram for another guide electromagnetic valve that the present invention provides；
The structural schematic diagram of the guide valve blocks of guide electromagnetic valve in Fig. 8: Fig. 7.
Fig. 3 -- the label declaration in Fig. 8:
1- valve body of main valve component；
11- main valve chamber, 12- primary valve；
13- main valve plug, 131- inner hole；
14- main valve inlet channel；
15- Main valve outlet channel；
16- main valve body；
17- inlet tube, 18- outlet；
2- pilot valve valve part；
21- guide's valve chamber, 22- poppet port；
23- pilot passage, 24- connecting section；
25/25A- guide valve blocks, 251- base portion；
3- pilot valve driving part；
31- pilot valve, 32- sleeve；
33- dynamic iron core, 34- static iron core；
35- electromagnetic coil；
4/4A- valve deck；
5- sealing element；
6- spring；
7- gasket.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art better understand technical solution of the present invention
The mode of applying is described in further detail.
Fig. 3 A and Fig. 3 B are a kind of guide electromagnetic valve structural representation in closing and unlatching respectively that the present invention provides
Figure, Fig. 4 are the structural schematic diagram of the guide valve blocks of guide electromagnetic valve in Fig. 3 A, and Fig. 5 is the ring of guide electromagnetic valve in Fig. 3 A
The structural schematic diagram of shape main valve plug, Fig. 6 are the structural schematic diagram of the main valve body of guide electromagnetic valve in Fig. 3 A.
As shown in Fig. 3 A, Fig. 3 B, Fig. 4, Fig. 5 and Fig. 6.Guide electromagnetic valve includes valve body of main valve component 1, pilot valve valve body
Part 2 and pilot valve driving part 3.
Valve body of main valve component 1 includes main valve body 16, is provided with main valve chamber 11 in main valve body 16, logical in the bottom of main valve chamber 11
It crosses processing and forms primary valve 12.Main valve inlet channel 14 is connected to main valve chamber 11；Main valve outlet channel 15 is connected to primary valve 12.
Inlet tube 17 is welded on 14 one end of main valve inlet channel；Outlet 18 is welded on 15 one end of Main valve outlet channel.
Pilot valve valve part 2 includes guide valve blocks 25, and the base portion 251 of guide valve blocks 25 is substantially cylindrical in the present embodiment
Shape structure extends outside to form disc-shaped structure as valve deck 4 from base portion 251, extended axially downward from base portion 251 to be formed it is convex
For tubular structure as connecting section 24, connecting section 24 offers through hole as pilot passage 23 out.
In this embodiment, guide valve blocks 25 and valve deck 4 and connecting section 24 are integrated the structure of machine-shaping.Valve deck 4
With the installation cooperation of main valve body 16 with closed main valve chamber 11, while pilot valve valve part 2 is fixed on valve body of main valve component 1,
The outer diameter D 1 of connecting section 24 is less than the aperture D2 of primary valve 12, and the connecting section 24 of pilot valve valve part 2 extends downward into master
In valve port 12.
Guide's valve chamber 21 is provided in guide valve blocks 25, guide's valve chamber 21 is connected to main valve chamber 11.The bottom of guide's valve chamber 21
Portion forms poppet port 22 by processing, and pilot passage 23 includes the path section being connected to poppet port 22 and leads to Main valve outlet
The major diameter section that road 15 is connected to.In this way when pilot valve is opened, releases the high-pressure fluid in guide's valve chamber 21 more rapidly, improve
The unlatching ability of solenoid valve.
Pilot valve driving part 3 includes sleeve 32, and electromagnetic coil 35 is arranged with outside sleeve 32.Upper end weldering in sleeve 32
It connects and is fixed with static iron core 34, dynamic iron core 33 is slidably disposed in sleeve 32, and the front end of dynamic iron core 33 is provided with pilot valve
31, pilot valve driving part 3 is welded on guide valve blocks 25 by sleeve 32, and pilot valve 31 extend into control in guide's valve chamber 21
The poppet port 22 it is opening/closing.
Main valve plug 13 as cyclic structure is arranged in main valve chamber 11, opens on the hole wall of the inner hole 131 of main valve plug 13
Equipped with annular groove, sealing element 5 is provided in annular groove, main valve plug 13 is set in connecting section 24 by inner hole 131, and is led to
Cross close fit of the realization of sealing element 5 between main valve plug 13 and connecting section 24.The outside diameter and main valve chamber of main valve plug 13
11 inner diameter matches, and main valve plug 13 can axially be slided in main valve chamber 11 relative to the connecting section 24 of guide valve blocks 25
It is dynamic, with the unlatching and closure of control bound mouth 12.
Main valve chamber 11 is additionally provided with spring 6, and spring 6 is that spring base supports main valve plug 13 with the base portion 251 of guide valve blocks 25
To primary valve 12.
When electromagnetic coil 35 is in the power-off state (shown in Fig. 3 A), dynamic iron core 33 under spring force, drives guide
Spool 31, which moves down, closes poppet port 22.The high-pressure fluid medium in main valve inlet channel 14 is flowed into guide's valve chamber on top
21 and main valve chamber 11 in, and keep high pressure.Main valve plug 13 abuts master under the action of the active force of spring 6 and hydraulic pressure
Valve port 12, is in close state guide electromagnetic valve；When electromagnetic coil 35 is powered, dynamic iron core 33 acts on lower gram in magnetic field force
Spring force resistance is taken, drives pilot valve 31 to move up and opens poppet port 22.Height in guide's valve chamber 21 and main valve chamber 11
Pressure medium is flowed out by poppet port 22, and fluid media (medium) number of dropouts is greater than influx in main valve chamber 11, in the work of hydraulic pressure
Under, main valve plug 13 overcomes the active force upward sliding of spring 6 to open primary valve 12, and guide electromagnetic valve is made to be in opening state
State.
Since main valve plug 13 is set in connecting section 24, so having good guiding performance in sliding process, do not allow
It easily blocks, and main valve plug 13 is annular design, relative to whole disc-shape, driving force required for sliding it wants small by one
A bit, the flexibility ratio of control valve makes moderate progress, which applies in large flow fluid control system, has good
Improvement effect.
Fig. 7 is the structural schematic diagram for another guide electromagnetic valve that the present invention provides, and Fig. 8 is guide type electromagnetic in Fig. 7
The structural schematic diagram of the guide valve blocks of valve.
As shown in Figure 7 and Figure 8.The technical solution and aforementioned schemes the difference is that, pilot valve valve part 2 include first
Pilot valve body 25A extends axially downward to form protrusion tubular structure as connecting section 24, even from the base portion 251 of guide valve blocks 25A
Adapter tube portion 24 offers through hole as pilot passage 23.Valve deck 4A is to pass through again with guide valve blocks 25A after discoid part is processed
Welding is welded together.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of guide electromagnetic valve, comprising:
Valve body of main valve component (1), the valve body of main valve component (1) include the main valve body (16) equipped with main valve chamber (11), the master
It is provided with primary valve (12) and main valve plug (13) in valve chamber (11), main valve inlet channel (14) are connected to the main valve chamber (11),
Main valve outlet channel (15) is connected to the primary valve (12)；
Pilot valve valve part (2), the pilot valve valve part (2) include the guide valve blocks (25) equipped with guide's valve chamber (21), institute
It states and is provided with poppet port (22) in guide's valve chamber (21), guide's valve chamber (21) is connected to the main valve chamber (11)；
Pilot valve driving part (3), the pilot valve driving part (3) include pilot valve (31), and the pilot valve (31) is protruded into
The control poppet port (22) is opening/closing in guide's valve chamber (21)；
Valve deck (4), the valve deck (4) and the main valve body (16) cooperate with the closed main valve chamber (11)；
It is characterized in that, the pilot valve valve part (2) further includes connecting section (24), the connecting section (24) has pilot valve
Channel (23), the poppet port (22) is connected to by the pilot passage (23) with the Main valve outlet channel (15), described
Main valve plug (13) is to be set in the connecting section (24) and can slide axially to control the opening/closing ring-type of the primary valve (12)
Spool.
2. guide electromagnetic valve as described in claim 1, which is characterized in that the main valve plug (13) and the connecting section
(24) sealing element (5) are provided between.
3. guide electromagnetic valve as described in claim 1, which is characterized in that being additionally provided in the main valve chamber (11) will be described
Spring (6) of the main valve plug (13) against the primary valve (12).
4. guide electromagnetic valve as described in claim 1, which is characterized in that the outer diameter (D1) of the connecting section (24) is less than
The aperture (D2) of the primary valve (12).
5. guide electromagnetic valve as claimed in claim 4, which is characterized in that the connecting section (24) extends to the main valve
In mouth (12).
6. guide electromagnetic valve as claimed in claim 4, which is characterized in that the pilot passage (23) includes and the guide
The path section of valve port (22) connection and the major diameter section being connected to the Main valve outlet channel (15).
7. guide electromagnetic valve as claimed in any one of claims 1 to 6, which is characterized in that the valve deck (4) and the guide
Valve body (25) is integrally formed.
8. guide electromagnetic valve as claimed in any one of claims 1 to 6, which is characterized in that connecting section (24) and the guide
Valve body (25) is integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610437514.2A CN107514465B (en) | 2016-06-17 | 2016-06-17 | Guide electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610437514.2A CN107514465B (en) | 2016-06-17 | 2016-06-17 | Guide electromagnetic valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107514465A CN107514465A (en) | 2017-12-26 |
| CN107514465B true CN107514465B (en) | 2019-05-28 |
Family
ID=60720878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610437514.2A Active CN107514465B (en) | 2016-06-17 | 2016-06-17 | Guide electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107514465B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576052A (en) * | 2017-09-25 | 2018-01-12 | 江阴市南丰科技有限公司 | A kind of firing equipment for Chemical Manufacture |
| CN108488473B (en) * | 2018-03-16 | 2023-12-15 | 武汉理工大学 | Pilot-operated piezoelectric valve |
| CN110792786B (en) * | 2018-08-01 | 2021-09-28 | 盾安环境技术有限公司 | Electromagnetic valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4179096A (en) * | 1978-04-03 | 1979-12-18 | Automatic Switch Company | Valve member for pilot operated valves |
| GB2059019B (en) * | 1979-09-20 | 1984-05-02 | Rilco Maschf | Valve |
| CN201116609Y (en) * | 2007-10-24 | 2008-09-17 | 河南海力特机电制造有限公司 | High-pressure water-base solenoid valve |
| CN201116606Y (en) * | 2007-11-15 | 2008-09-17 | 上海欧凯电磁阀制造有限公司 | Solenoid valve |
| CN204961974U (en) * | 2015-09-16 | 2016-01-13 | 浙江三花制冷集团有限公司 | Pilot -operated electromagnetic valve |
-
2016
- 2016-06-17 CN CN201610437514.2A patent/CN107514465B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4179096A (en) * | 1978-04-03 | 1979-12-18 | Automatic Switch Company | Valve member for pilot operated valves |
| GB2059019B (en) * | 1979-09-20 | 1984-05-02 | Rilco Maschf | Valve |
| CN201116609Y (en) * | 2007-10-24 | 2008-09-17 | 河南海力特机电制造有限公司 | High-pressure water-base solenoid valve |
| CN201116606Y (en) * | 2007-11-15 | 2008-09-17 | 上海欧凯电磁阀制造有限公司 | Solenoid valve |
| CN204961974U (en) * | 2015-09-16 | 2016-01-13 | 浙江三花制冷集团有限公司 | Pilot -operated electromagnetic valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107514465A (en) | 2017-12-26 |
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Effective date of registration: 20220819 Address after: 312500 Daming new area, Zhejiang Xinchang Economic Development Zone, Xinchang County, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanhua Commercial Refrigeration Co.,Ltd. Address before: 312500 R & D building of Zhejiang Sanhua refrigeration group, xialiquan village, Qixing street, Xinchang County, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |