CN203963106U - A kind of four-way change-over valve and valve component thereof - Google Patents
A kind of four-way change-over valve and valve component thereof Download PDFInfo
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- CN203963106U CN203963106U CN201420403754.7U CN201420403754U CN203963106U CN 203963106 U CN203963106 U CN 203963106U CN 201420403754 U CN201420403754 U CN 201420403754U CN 203963106 U CN203963106 U CN 203963106U
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- valve
- over
- adapter
- valve seat
- way change
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- Expired - Lifetime
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- 238000000034 method Methods 0.000 abstract description 16
- 238000003466 welding Methods 0.000 description 13
- 238000012545 processing Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a kind of four-way change-over valve and valve component thereof, wherein the valve component of four-way change-over valve, comprises valve body, is located at the valve seat in described valve body, and is installed on the adapter in described valve body, described valve seat; The inner of described adapter and the pilot hole of valve seat form and closely cooperate, the load segment that described adapter is corresponding with described valve body and the pilot hole of described valve body form interference fit, and the part between described the inner, described load segment forms with the pilot hole of described valve seat the Spielpassung that gap is greater than zero.Adopt said structure, the load segment of taking over has ensured to form between adapter and valve body effective pretightening force, the inner of taking over ensures to take over relative with valve seat position fixing, thereby ensure that adapter, valve body and valve seat are adjacent to, and the remainder of taking over all and have gap between the pilot hole of valve seat, avoid adapter to press-fit at ecto-entad the button of encountering the pilot hole inwall of valve seat in process and cause and hinder phenomenon.In addition, the invention also discloses a kind of four-way change-over valve of applying above-mentioned valve component.
Description
Technical field
The utility model relates to air conditioner technical field, relates in particular to a kind of four-way change-over valve and valve component thereof.
Background technique
Please refer to Fig. 1 to Fig. 4, Fig. 1 is the assembly structure schematic diagram of the valve component of four-way change-over valve in prior art, and Fig. 2 to Fig. 4 is respectively the structural representation of adapter in Fig. 1, valve seat and valve body.
The valve component of idle call four-way change-over valve, comprise taking over 1 ', valve body 2 ' and valve seat 3 ', in figure, above-mentioned adapter 1 ' with valve body 2 ', the part of valve seat 3 ' coordinate is straight tubular construction, the pilot hole 21 of valve body ', the pilot hole 31 of valve seat ' be also cylindrical hole, valve seat 3 ' be located at valve body 2 ' inside, take over the pilot hole 21 that 1 ' ecto-entad is installed on valve body ', the pilot hole 31 of valve seat ' in.Take over 1 ', valve body 2 ' and valve seat 3 ' generally adopt welding manner assembling, adopt the matching gap between welding process requirement part enough little, shaping is sprawled in the infiltration of guarantee scolder.
Have at present two kinds of modes to realize the assembling before welding:
The first, take over 1 ' with valve seat 3 ', valve body 2 ' adopt overall Spielpassung, then adopt frock that three is compressed, finally welding forming.
The second, by adapter 1 ' with valve seat 3 ', valve body 2 ' overall interference fit press-fit fixingly closely cooperate so that three reaches, then welding forming.
Adopt first kind of way, because needs frock compresses part, general frock volume ratio is larger, and this mode is applicable to easy fire weldering soldering.If adopt tunnel furnace welding, frock is also wanted Synchronous Heating, recept the caloric larger, and waste electric energy.In order to prevent frock temperature distortion, select the heat-resistance stainless steel material that price is higher simultaneously.In addition, inevitably frock is not long working life yet, so manufacture cost is higher.
Adopt the second way, for ensureing that part can press-fit smoothly, valve seat 3 ' upper and valve body 2 ' on processing dimension tolerance, the positioning tolerance of adapter 1 ' pilot hole need to reach higher precision, need to produce high-precision part.Due to the highi degree of accuracy of part, the mould that will use in production and processing can only allow the less wear extent of appearance, and it is high precision apparatus that associated production equipment also requires, so produce, upper die tooling takes and cost of equipment is higher.Moreover because element precision requirement is high, the rework rate of its part and scrappage certainly will be not low.Owing to adopting drive fit between part, assembling difficulty is high, and manufacturing efficiency is low, also can improve to a certain extent processing cost.Synchronous press mounting takes over for 1 ' time, occurs a little tilting if press-fit angle, can detain wound take over 1 ', or cause and take over 1 ' press not enter the serious product rejection that causes.And, this mode of structure, take over 1 ', valve body 2 ' and valve seat 3 ' pretightening force inadequate, so when actual production, exist and press-fit rear disengagement phenomenon between part, causing can not welding forming, parts do over again and the ratio scrapped also higher.From above many-side, the processing cost of product is higher.
In view of this, urgently for above-mentioned technical problem, the valve component of four-way change-over valve in prior art is done to further optimal design, make it can ensure that adapter and valve body, valve seat three directly closely cooperate, can not detain again wound takes over, and compress without auxiliary frock, under the prerequisite that ensures structure stability, cut down finished cost.
Model utility content
The purpose of this utility model is for providing a kind of valve component of four-way change-over valve, this valve component can ensure that adapter and valve body, valve seat three directly closely cooperate, can not detain again wound takes over, and compress without auxiliary frock, under the prerequisite that ensures structure stability, reduced the processing cost of valve component.On this basis, another object of the present utility model is for providing a kind of four-way change-over valve of applying above-mentioned valve component.
For solving the problems of the technologies described above, the utility model provides a kind of valve component of four-way change-over valve, comprises valve body, is located at the valve seat in described valve body, and is installed on the adapter in described valve body, described valve seat; The inner of described adapter and the pilot hole of valve seat form and closely cooperate, the load segment that described adapter is corresponding with described valve body and the pilot hole of described valve body form interference fit, and the part between described the inner, described load segment forms with the pilot hole of described valve seat the Spielpassung that gap is greater than zero.
Adopt said structure, the load segment of taking over has ensured to form effective pretightening force between adapter and valve body, and the inner of adapter ensures to take over relative with valve seat position fixing, thereby ensures that adapter, valve body and valve seat are adjacent to, each part in welding process can not be thrown off, ensure solder yield.And the remainder of taking over all and have gap between the pilot hole of valve seat, avoid adapter to press-fit at ecto-entad the button of encountering the pilot hole inwall of valve seat in process and cause and hinder phenomenon.
In general, compared with the structure of adapter in prior art, valve body and valve seat entirety interference fit, this valve component has reduced close-fitting length, has avoided taking over the phenomenon of button wound; Compared with the structure of adapter in prior art, valve body and valve seat entirety Spielpassung, this valve component can, by simply press-fiting realization pretension preferably each other, compress three without special frock.Therefore, above-mentioned valve component can ensure that adapter, valve body and valve seat three closely cooperate, and can not detain again wound and take over, and compress without special frock, under the prerequisite that ensures structure stability, greatly reduces cost of production.
Preferably, the pilot hole of described valve seat is the first cone shape hole of flaring from inside to outside.
Preferably, the range of taper of described the first cone shape hole is 2 °～15 °.
Preferably, the pilot hole of described valve seat comprise be located at the circular port of inner side and be located at outside, the second cone shape hole of flaring from inside to outside, described circular port and described inner formation closely cooperate, and the part between described the second cone shape hole and described the inner, described load segment forms the Spielpassung that gap is greater than zero.
Preferably, the range of taper of described the second cone shape hole is 2 °～15 °.
Preferably, the pilot hole of described valve body is the triconic hole of flaring from inside to outside.
Preferably, the range of taper in described triconic hole is 2 °～30 °.
Preferably, the internal end surface of described adapter is provided with annular knurl, and the pilot hole of described annular knurl and described valve seat forms Spielpassung or the interference fit that gap is zero.
Preferably, described load segment is provided with lug boss, and the pilot hole of described lug boss and described valve body forms interference fit.
Preferably, it is identical that described adapter is positioned at the cross section of described lug boss both sides, and described lug boss is circular arc type or broken line type.
Preferably, the cross section that described adapter is positioned at described lug boss outside is greater than the cross section of described lug boss inner side, and described lug boss is the slope section of flaring from inside to outside.
The utility model also provides a kind of four-way change-over valve, comprises valve component and the spool of being located at described valve component inside; Described valve component adopts the valve component of four-way change-over valve as above.
Because above-mentioned valve component has as above technique effect, therefore, the four-way change-over valve of applying this valve component also should have identical technique effect, does not repeat them here.
Brief description of the drawings
Fig. 1 is the assembly structure schematic diagram of the valve component of four-way change-over valve in prior art;
Fig. 2 to Fig. 4 is respectively the structural representation of adapter in Fig. 1, valve seat and valve body;
The structural representation of a kind of embodiment of the valve component that Fig. 5 is four-way change-over valve that the utility model provides;
Fig. 6 is the structural representation of a kind of embodiment of valve seat in Fig. 5;
Fig. 7 is the structural representation of the another kind of embodiment of valve seat in Fig. 5;
Fig. 8 is the structural representation of valve body in Fig. 5;
Fig. 9 is the structural representation of a kind of embodiment of taking in Fig. 5;
Figure 10 is the structural representation of the another kind of embodiment of taking in Fig. 5.
Wherein, the corresponding relation between reference character and the component names in Fig. 1 to Fig. 4 is:
Adapter 1 ';
Valve body 2 '; The pilot hole 21 of valve body ';
Valve seat 3 '; The pilot hole 31 of valve seat ';
Corresponding relation between reference character and component names in Fig. 5 to Figure 10 is:
Take over 1; Inner 11; Lug boss 12;
Valve body 2; The pilot hole 21 of valve body;
Valve seat 3; The pilot hole 31 of valve seat; Circular port 311; The second cone shape hole 312.
Embodiment
Core of the present utility model is for providing a kind of valve component of four-way change-over valve, this valve component can ensure that adapter and valve body, valve seat three directly closely cooperate, can not detain again wound takes over, and compress without auxiliary frock, under the prerequisite that ensures structure stability, reduced the processing cost of valve component.On this basis, another core of the present utility model is for providing a kind of four-way change-over valve of applying above-mentioned valve component.
In order to make those skilled in the art understand better the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
It should be noted that, the noun of locality " interior " herein refer to along valve body 2 radially, from the direction in the sensing center of circle, outside, the i.e. direction from top to bottom of adapter 1 in Fig. 5; The noun of locality " outward " herein refer to along valve body 2 radially, point to the direction in outside from the center of circle, in Fig. 5, take over 1 direction from top to bottom; The appearance that should be appreciated that these nouns of locality is set up taking Figure of description as benchmark, and their appearance should not affect protection domain of the present utility model.
In a kind of embodiment, as shown in Figure 5, the utility model provides a kind of valve component of four-way change-over valve, comprises valve body 2, is located at the valve seat 3 in valve body 2, and is installed on the adapter 1 in valve body 2, valve seat 3.Adapter 1, valve body 2 and valve seat 3 are generally assembled by welding manner, and before welding, three assembles as follows:
The inner 11 of adapter 1 forms and closely cooperates with the pilot hole of valve seat 31, the load segment that adapter 1 is corresponding with valve body 2 and the pilot hole 21 of valve body form interference fit, and the part between the inner 11, load segment forms with the pilot hole 31 of valve seat the Spielpassung that gap is greater than zero.Here " load segment " taken over refers to takes over the corresponding also part of assembling of 1 assembling pilot hole 21 rear and valve body, refer to and take over after 1 assembling the part coordinating with the inner of the pilot hole 31 of valve seat and take over 1 " the inner ", between the inner of adapter 1 and the load segment of adapter 1, be connected with other parts.
Adopt said structure, the load segment of adapter 1 has ensured to form effective pretightening force between adapter 1 and valve body 2, the inner 11 of adapter 1 ensures that adapter 1 is relative fixing with valve seat 3 positions, thereby ensure that adapter 1, valve body 2 are adjacent to valve seat 3, each part in welding process can not be thrown off, ensure solder yield.And take over 1 remainder all and between the pilot hole 31 of valve seat, there is gap, avoid taking over 1 and press-fit at ecto-entad the button of encountering pilot hole 31 inwalls of valve seat in process and cause and hinder phenomenon.
In general, with in prior art, take over 1, compared with the structure of valve body 2 and valve seat 3 overall interference fit, this valve component has reduced close-fitting length, has avoided taking over the phenomenon of 1 button wound; With in prior art, take over 1, compared with the structure of valve body 2 and valve seat 3 overall Spielpassung, this valve component can, by simply press-fiting realization pretension preferably each other, compress three without special frock.Therefore, above-mentioned valve component can ensure to take over 1, valve body 2 closely cooperates with valve seat 3 threes, can not detain again wound and take over 1, and compress without special frock, under the prerequisite that ensures structure stability, greatly reduces cost of production.
Particularly, before assembling, can be in the interior preset weld-ring of valve seat 3, again valve body 2 and valve seat 3 are aligned, can be at the interior insertion plug of the pilot hole of valve seat 31, then adopt briquetting that valve body 2 and valve seat 3 are compressed, then take away plug, be pressed into one by one and take over 1, so that each part forms good pretension.After assembling, then product is heated to welding forming.
It should be noted that, " closely cooperate " herein and form the Spielpassung that gap is very little or gap is zero between the inner 11 of adapter 1 of referring to and the pilot hole 31 of valve seat, or the two forms interference fit, so that the position between adapter 1 inner 11 and valve seat 3 is relative fixing.
In concrete scheme, as shown in Figure 6, Fig. 6 is the structural representation of a kind of embodiment of valve seat 3 in Fig. 5, and the pilot hole 31 of above-mentioned valve seat is the first cone shape hole of flaring from inside to outside.
Like this, the pilot hole 31 of valve seat from inside to outside forms uncovered, can 1 cylindrical body that be set to cross section and equal pilot hole 31 smallest cross-sectional of valve seat will be taken over, therefore, in the process that is pressed into adapter 1, can avoid taking over pilot hole 31 inwalls of 1 frequent impact valve seat and cause that taking over 1 button hinders, the inner 11 of realizing adapter 1 closely cooperates with the pilot hole 31 of valve seat, and all the other most of cross sections of adapter 1 are less than the cross section of the first cone shape hole.
Can expect, the pilot hole 31 of above-mentioned valve seat is not limited in said structure.In another kind of concrete scheme, as shown in Figure 7, Fig. 7 is the structural representation of the another kind of embodiment of valve seat 3 in Fig. 5, the pilot hole 31 of valve seat comprise be located at the circular port 311 of inner side and be located at outside, the second cone shape hole 312 of flaring from inside to outside, circular port 311 forms and closely cooperates with the inner 11 of taking over 1, and the part between the second cone shape hole 312 and the inner 11, load segment forms the Spielpassung that gap is greater than zero.
Like this, can 1 cylindrical body that be set to cross section and equal above-mentioned circular port 311 cross sections will be taken over, in the process that is pressed into adapter 1, also can avoid taking over pilot hole 31 inwalls of 1 frequent impact valve seat and cause that taking over 1 button hinders, the inner 11 of realizing adapter 1 closely cooperates with circular port 311, and all the other most of cross sections of adapter 1 are less than the second cone shape hole 312.
In scheme, the range of taper of above-mentioned the first cone shape hole, the second cone shape hole 312 can be 2 °～15 ° more specifically.Adopt this scope, can make to take over 1 and there is suitable gap with the pilot hole 31 of valve seat, can avoid taking over 1 wound of button while being pressed into, can not affect due to excesssive gap again the working stability of valve component.Certainly, the range of taper of above-mentioned the first cone shape hole, the second cone shape hole 312 also can adopt other scopes.
In another kind of embodiment, please refer to Fig. 8, Fig. 8 is the structural representation of valve body 2 in Fig. 5, the pilot hole 21 of this valve body is the triconic hole of flaring from inside to outside.
Similar to the effect of above-mentioned the first cone shape hole, the second cone shape hole 312, the pilot hole of valve body 21 is set to triconic hole and equally also can prevents from taking over 1 button wound.
In concrete scheme, the range of taper in above-mentioned triconic hole is 2 °～30 °.Similar to the effect of the range of taper of above-mentioned the first cone shape hole, the second cone shape hole 312, adopt above-mentioned scope, can avoid taking over 1 and button occur while being pressed into and hinder phenomenon, can not affect due to excesssive gap again the working stability of valve component.More specifically, the range of taper in above-mentioned triconic hole can be 3 °～15 °, and certainly, this range of taper can also adopt other numerical value.
Can expect, the pilot hole 21 of above-mentioned valve body, not only for said structure, also can be set to cylindrical hole.
In another kind of embodiment, 11 surfaces, the inner of this adapter 1 can be provided with annular knurl, and it is zero Spielpassung or interference fit that the pilot hole 31 of annular knurl and valve seat forms gap.
Adopt this structure, annular knurl can further increase the frictional force between the inner 11 and the valve seat 3 of taking over 1, strengthens the firm reliability of the two relative position.Particularly, this knurling structure can adopt straight burr, other lines that can certainly adopt twill or straight burr and twill to be interwoven.
In another kind of embodiment, as shown in Figure 5, the load segment of above-mentioned adapter 1 can be provided with lug boss 12, and the cross section that this lug boss 12 is set is greater than the cross section of the pilot hole 21 of valve body, and lug boss 12 forms interference fit with the pilot hole 21 of valve body.Like this, lug boss 12 can realize take over 1 with the pretension of valve body 2, to ensure that each part do not throw off in follow-up welding process.
In concrete scheme, as shown in Figure 9, Fig. 9 is the structural representation of taking over a kind of embodiment of 1 in Fig. 5, and taking over 1, to be positioned at the cross section of lug boss 12 both sides identical, and lug boss 12 is broken line type.The lug boss 12 of this structure has processing, feature easily, makes to take over 1 processing cost lower.This lug boss 12 can be one-body molded with adapter 1 by bulging process, also lug boss 12 and adapter 1 can be made as to split-type structural, lug boss 12 is welded in to the outside of taking over 1.Can expect, above-mentioned lug boss 12, not only for broken line structure, can also also can be made as arcuate structure by this lug boss 12.
In another kind of concrete scheme, as shown in figure 10, this figure is the structural representation of taking over 1 another kind of embodiment in Fig. 5, and the cross section that above-mentioned adapter 1 is positioned at lug boss 12 outsides is greater than the cross section of lug boss 12 inner sides, and lug boss 12 is the slope section of flaring from inside to outside.Adopt this lug boss 12 can realize equally the interference fit of adapter 1 and valve body 2.
The utility model also provides a kind of four-way change-over valve, comprises valve component and the spool of being located at valve component inside; Valve component adopts the valve component of four-way change-over valve as above.
Because the valve component of above-mentioned four-way change-over valve has technique effect as above, therefore, the four-way change-over valve of applying this valve component also should have identical technique effect, does not repeat them here.
Above a kind of four-way change-over valve provided by the utility model and valve component thereof are described in detail.Applied specific case herein principle of the present utility model and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (12)
1. the valve component of a four-way change-over valve, comprise valve body (2), be located at the valve seat (3) in described valve body (2), and be installed on the adapter (1) in described valve body (2), described valve seat (3); It is characterized in that, the inner (11) of described adapter (1) forms and closely cooperates with the pilot hole (31) of valve seat, the pilot hole (21) of the load segment that described adapter (1) is corresponding with described valve body (2) and described valve body forms interference fit, and the part between described the inner (11), described load segment forms with the pilot hole (31) of described valve seat the Spielpassung that gap is greater than zero.
2. the valve component of four-way change-over valve according to claim 1, is characterized in that, the pilot hole (31) of described valve seat is the first cone shape hole of flaring from inside to outside.
3. the valve component of four-way change-over valve according to claim 2, is characterized in that, the range of taper of described the first cone shape hole is 2 °～15 °.
4. the valve component of four-way change-over valve according to claim 1, it is characterized in that, the pilot hole (31) of described valve seat comprise be located at the circular port (311) of inner side and be located at outside, second cone shape hole (312) of flaring from inside to outside, described circular port (311) forms and closely cooperates with described the inner (11), and the part between described the second cone shape hole (312) and described the inner (11), described load segment forms the Spielpassung that gap is greater than zero.
5. the valve component of four-way change-over valve according to claim 4, is characterized in that, the range of taper of described the second cone shape hole (312) is 2 °～15 °.
6. according to the valve component of the four-way change-over valve described in claim 1-5 any one, it is characterized in that, the pilot hole (21) of described valve body is the triconic hole of flaring from inside to outside.
7. the valve component of four-way change-over valve according to claim 6, is characterized in that, the range of taper in described triconic hole is 2 °～30 °.
8. according to the valve component of the four-way change-over valve described in claim 1-5 any one, it is characterized in that, the surface, the inner (11) of described adapter (1) is provided with annular knurl, and the pilot hole (31) of described annular knurl and described valve seat forms Spielpassung or the interference fit that gap is zero.
9. according to the valve component of the four-way change-over valve described in claim 1-5 any one, it is characterized in that, described load segment is provided with lug boss (12), and described lug boss (12) forms interference fit with the pilot hole (21) of described valve body.
10. the valve component of four-way change-over valve according to claim 9, is characterized in that, it is identical that described adapter (1) is positioned at the cross section of described lug boss (12) both sides, and described lug boss (12) is circular arc type or broken line type.
The valve component of 11. four-way change-over valves according to claim 9, it is characterized in that, the cross section that described adapter (1) is positioned at described lug boss (12) outside is greater than the cross section of described lug boss (12) inner side, and described lug boss (12) is the slope section of flaring from inside to outside.
12. 1 kinds of four-way change-over valves, comprise valve component and the spool of being located at described valve component inside; It is characterized in that, described valve component adopts the valve component of the four-way change-over valve as described in claim 1-11 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420403754.7U CN203963106U (en) | 2014-07-21 | 2014-07-21 | A kind of four-way change-over valve and valve component thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420403754.7U CN203963106U (en) | 2014-07-21 | 2014-07-21 | A kind of four-way change-over valve and valve component thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203963106U true CN203963106U (en) | 2014-11-26 |
Family
ID=51923688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420403754.7U Expired - Lifetime CN203963106U (en) | 2014-07-21 | 2014-07-21 | A kind of four-way change-over valve and valve component thereof |
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| Country | Link |
|---|---|
| CN (1) | CN203963106U (en) |
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2014
- 2014-07-21 CN CN201420403754.7U patent/CN203963106U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170209 Address after: 312500 Zhejiang city of Shaoxing province Xinchang County Mei Zhu Zhen three flower Mei Zhu Industrial Park Administration Building Patentee after: ZHEJIANG SANHUA INTELLIGENT CONTROLS Co.,Ltd. Address before: 312500 Xinchang, Zhejiang province Qixing street under the village of Liquan Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141126 |