CN204253443U - For afflux spiral case and the centrifugal blower of centrifugal blower - Google Patents
For afflux spiral case and the centrifugal blower of centrifugal blower Download PDFInfo
- Publication number
- CN204253443U CN204253443U CN201420596012.0U CN201420596012U CN204253443U CN 204253443 U CN204253443 U CN 204253443U CN 201420596012 U CN201420596012 U CN 201420596012U CN 204253443 U CN204253443 U CN 204253443U
- Authority
- CN
- China
- Prior art keywords
- impeller
- runner
- centrifugal blower
- spiral case
- afflux
- 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.)
- Active
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of afflux spiral case for centrifugal blower and centrifugal blower.For the afflux spiral case of centrifugal blower, comprise impeller protecgulum, impeller bonnet and volute runner, impeller protecgulum and impeller bonnet are covered in the central cavity of volute runner from the both sides of volute runner respectively, impeller protecgulum, impeller bonnet and volute runner enclose the impeller cavity formed for holding impeller, the impeller shaft that volute runner presses close to the runner wall body wound impeller of impeller cavity forms a positive round, and the runner wall body pressing close to impeller cavity offers a wide tunnel inlets along the circumference of impeller; Impeller protecgulum and/or impeller bonnet are provided with for the vibration-reducing construction that impeller cavity is eliminated the noise and cover body structure is reinforced.Reduce surface friction drag and the manufacture technics difficulty of High Rotation Speed air-flow; Improve the extension pressur efficiency of spiral case; There is the function that frame supports is stressed.
Description
Technical field
The utility model relates to centrifugal blower field, especially, relates to a kind of afflux spiral case for centrifugal blower.In addition, the utility model also relates to a kind of centrifugal blower comprising the above-mentioned afflux spiral case for centrifugal blower.
Background technique
The spiral case of centrifugal blower plays the effect of converging air-flow, reducing impeller outlet airspeed, expanding static pressure in total journey, and spiral case generally acts on 20% the contribution rate of centrifugal blower total pressure efficiency.
At present, the spiral case of centrifugal blower adopts nearly logarithmic spiral or nearly Archimedes spiral moulding according to the width of casing and the opening width of volute, and within the scope of an angle of circumference, the width of flow path of spiral case is constant, and its radial dimension then increases by nearly helical rule.The moistening perimeter dimension of existing spiral case is large, and the surface friction drag of the High Rotation Speed air-flow causing impeller to produce is large, and cause energy consumption to increase, airflow kinetic energy is converted into heat energy in a large number, reduces the efficiency of spiral case diffusion; The manufacturing process difficulty of spiral case moulding simultaneously, manufacture cost is high.
Model utility content
The utility model object is to provide a kind of afflux spiral case for centrifugal blower and centrifugal blower, large with the moistening perimeter dimension of the worm frame solving existing centrifugal blower, causes energy consumption to increase, and extension pressur efficiency reduces; The manufacturing process difficulty of spiral case moulding, the technical problem that manufacture cost is high.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of afflux spiral case for centrifugal blower, comprise impeller protecgulum, impeller bonnet and volute runner, impeller protecgulum and impeller bonnet are covered in the central cavity of volute runner from the both sides of volute runner respectively, impeller protecgulum, impeller bonnet and volute runner enclose the impeller cavity formed for holding impeller, the impeller shaft that volute runner presses close to the runner wall body wound impeller of impeller cavity forms a positive round, and the runner wall body pressing close to impeller cavity offers a wide tunnel inlets along the circumference of impeller; Impeller protecgulum and/or impeller bonnet are provided with for the vibration-reducing construction that impeller cavity is eliminated the noise and cover body structure is reinforced.
Further, volute runner offers the runner exit for drawing air-flow away from one end of impeller cavity, and the radial cross section size of volute runner increases gradually along the air current flow direction in volute runner.
Further, the radial cross-sectional shape of volute runner is rectangle; The length dimension of the rectangular cross-section of volute runner increases gradually along the air current flow direction in volute runner, and/or the width dimensions of the rectangular cross-section of volute runner increases gradually along the air current flow direction in volute runner.
Further, the rotation angle position of the radial cross section of at least one section of volute runner is set to chamfering.
Further, impeller protecgulum and/or impeller bonnet are disc, and vibration-reducing construction is arranged at the outer surface away from impeller cavity on disc, and vibration-reducing construction is concave configuration and/or convex structure.
Further, concave configuration is at least one along the circular groove circumferentially of disc, and convex is configured to many rhombus muscle be laid in circular groove, and rhombus muscle is laid and being circumferentially arranged along disc along the radial direction of disc.
Further, runner exit is connected to the air-flow output tube of encorbelmenting, the sectional shape of the first end of air-flow output tube is identical with the sectional shape of runner exit, and the sectional shape of the second end of air-flow output tube is circular, and the sectional shape of the first end of air-flow output tube is to the sectional shape gradual change of the second end.
Further, the second end of air-flow output tube is equipped with adpting flange.
Further, the connection part of runner exit, air-flow output tube and impeller cavity three is provided with snail tongue; The internal face of snail tongue is set to the waveform of impacting for buffer gas flow, and the ripple of waveform internal face is arranged along the flow direction of air-flow; Or the internal face of snail tongue is provided with multiple circular arc projection impacted for buffer gas flow, circular arc projection is along the flow direction of air-flow and/or arrange along the direction perpendicular with air flow direction.
According to another aspect of the present utility model, additionally provide a kind of centrifugal blower, it comprises the above-mentioned afflux spiral case for centrifugal blower.
The utility model has following beneficial effect:
The utility model is used for the afflux spiral case of centrifugal blower, the runner wall body pressing close to impeller cavity is designed to the positive round of wound impeller axle, the moistening girth of volute runner is reduced, thus reduces surface friction drag and the manufacture technics difficulty of High Rotation Speed air-flow; By offering a wide tunnel inlets circumferentially along impeller on the runner wall body pressing close to impeller cavity, make to enter spiral casing flow passage in an orderly manner from impeller high velocity air out, reduce the velocity gradient in runner and gradient width, thus decrease the transformation of energy of airflow kinetic energy thermotropism, improve the extension pressur efficiency of spiral case; By covering before the impeller and/or impeller bonnet arranging vibration-reducing construction, at centrifugal blower in running, the noise that can reduce spiral case spreads out of intensity, reduce the generation of secondary noise, vibration-reducing construction can also strengthen the surface strength of impeller protecgulum and/or impeller bonnet simultaneously, make spiral case not only have collection wind diffusion function, also there is the function that frame supports is stressed.This afflux spiral case is not only applicable to centrifugal blower, and the expansion wind being simultaneously also applicable to other High Rotation Speed mechanisms expands stream.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the band biopsy cavity marker devices structure of the afflux spiral case for centrifugal blower of the utility model preferred embodiment;
Fig. 2 is the cross-sectional view of the afflux spiral case for centrifugal blower of the utility model preferred embodiment.
Marginal data:
1, impeller protecgulum; 2, impeller bonnet; 3, volute runner; 4, impeller cavity; 5, vibration-reducing construction; 51, tunnel inlets; 52, runner exit; 6, circular groove; 7, rhombus muscle; 8, air-flow output tube; 9, adpting flange; 10, snail tongue.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the utility model can by the multitude of different ways that limits and cover implement.
Fig. 1 is the structural representation of the band biopsy cavity marker devices structure of the afflux spiral case for centrifugal blower of the utility model preferred embodiment; Fig. 2 is the cross-sectional view of the afflux spiral case for centrifugal blower of the utility model preferred embodiment.
As depicted in figs. 1 and 2, the afflux spiral case for centrifugal blower of the present embodiment, comprise impeller protecgulum 1, impeller bonnet 2 and volute runner 3, impeller protecgulum 1 and impeller bonnet 2 are covered in the central cavity of volute runner 3 from the both sides of volute runner 3 respectively, impeller protecgulum 1, impeller bonnet 2 and volute runner 3 enclose the impeller cavity 4 formed for holding impeller, the impeller shaft that volute runner 3 presses close to the runner wall body wound impeller of impeller cavity 4 forms a positive round, and the runner wall body pressing close to impeller cavity 4 offers a wide tunnel inlets 51 along the circumference of impeller; Impeller protecgulum 1 and/or impeller bonnet 2 are provided with for the vibration-reducing construction 5 that impeller cavity 4 is eliminated the noise and cover body structure is reinforced.The utility model is used for the afflux spiral case of centrifugal blower, the runner wall body pressing close to impeller cavity 4 is designed to the positive round of wound impeller axle, the moistening girth of volute runner 3 is reduced, thus reduces surface friction drag and the manufacture technics difficulty of High Rotation Speed air-flow; By offering a wide tunnel inlets 51 circumferentially along impeller on the runner wall body pressing close to impeller cavity 4, make to enter spiral casing flow passage in an orderly manner from impeller high velocity air out, reduce the velocity gradient in runner and gradient width, thus decrease the transformation of energy of airflow kinetic energy thermotropism, improve the extension pressur efficiency of spiral case; By covering before the impeller on 1 and/or impeller bonnet 2, vibration-reducing construction 5 is set, at centrifugal blower in running, the noise that can reduce spiral case spreads out of intensity, reduce the generation of secondary noise, vibration-reducing construction 5 can also strengthen the surface strength of impeller protecgulum 1 and/or impeller bonnet 2 simultaneously, make spiral case not only have collection wind diffusion function, also there is the function that frame supports is stressed.This afflux spiral case is not only applicable to centrifugal blower, and the expansion wind being simultaneously also applicable to other High Rotation Speed mechanisms expands stream.
As depicted in figs. 1 and 2, in the present embodiment, volute runner 3 offers the runner exit 52 for drawing air-flow away from one end of impeller cavity 4.The radial cross section size of volute runner 3 increases gradually along the air current flow direction in volute runner 3.Form the enlarging shape volute runner that radial cross section expands gradually, reduce the moistening girth of runner further, effectively reduce the surface friction drag of High Rotation Speed air-flow, reduce windage loss, improve the extension pressur efficiency of spiral case.
As depicted in figs. 1 and 2, in the present embodiment, the radial cross-sectional shape of volute runner 3 is rectangle.Preferably, the radial cross-sectional shape of volute runner 3 is chamfering square.Can avoid the technology difficulty of circular cross-section moulding, make the shaping manufacture of spiral case more simple, dimensional accuracy is higher.The length dimension of the rectangular cross-section of volute runner 3 increases gradually along the air current flow direction in volute runner 3, and/or the width dimensions of the rectangular cross-section of volute runner 3 increases gradually along the air current flow direction in volute runner 3.The velocity gradient in runner and gradient width can be reduced, thus reduce the transformation of energy of airflow kinetic energy thermotropism, improve the extension pressur efficiency of spiral case.
In the present embodiment, the rotation angle position of the radial cross section of at least one section of volute runner 3 is set to chamfering.The shaping manufacture of volute runner 3 can be facilitated, reduce manufacture difficulty, the velocity gradient in runner and gradient width can be reduced simultaneously, thus reduce the transformation of energy of airflow kinetic energy thermotropism, improve the extension pressur efficiency of spiral case.
As depicted in figs. 1 and 2, in the present embodiment, impeller protecgulum 1 and/or impeller bonnet 2 are disc.Can ease of assembly.Disc structure can reduce the vibration probability of structure in running.Vibration-reducing construction 5 is arranged at the outer surface away from impeller cavity 4 on disc.The impact on vane rotary can either be prevented, the structural strength of impeller protecgulum 1 and/or impeller bonnet 2 can be strengthened again, improve the vibration resistance of structure, thus play the object of noise-decreasing.Vibration-reducing construction 5 is concave configuration and/or convex structure.By concave configuration and/or convex structure, local enhancement is carried out to the outer surface of impeller protecgulum 1 and/or impeller bonnet 2, form uneven configuration of surface, hinder the path of noise transmission, thus play the object of noise-decreasing.
As depicted in figs. 1 and 2, in the present embodiment, concave configuration is at least one along the circular groove 6 circumferentially of disc.Convex is configured to many rhombus muscle 7 be laid in circular groove 6.Rhombus muscle 7 is laid and being circumferentially arranged along disc along the radial direction of disc.By the collocation of circular groove 6 with rhombus muscle 7, the plate face intensity of impeller protecgulum 1 and/or impeller bonnet 2 can be improved, improve the vibration resistance of structure, the path of noise transmission can be hindered simultaneously, thus play the object of noise-decreasing.
As depicted in figs. 1 and 2, in the present embodiment, the runner exit 52 of volute runner 3 is connected to the air-flow output tube 8 of encorbelmenting.Air-flow is facilitated to export.The sectional shape of the first end of air-flow output tube 8 is identical with the sectional shape of runner exit 52.Facilitate structure split.The sectional shape of the second end of air-flow output tube 8 is circular.Facilitate anatomical connectivity.The sectional shape of the first end of air-flow output tube 8 is to the sectional shape gradual change of the second end.Conveniently form diffusion.Preferably, the sectional dimension of air-flow output tube 8 second end is greater than the sectional dimension of first end, forms the air-flow output tube of enlarging.
Adpting flange 9 is equipped with as shown in Figure 1, in the present embodiment, the second end of air-flow output tube 8.Be convenient to anatomical connectivity.
As shown in Figure 1, in the present embodiment, the connection part of runner exit 52, air-flow output tube 8 and impeller cavity 4 three is provided with snail tongue 10.The internal face of snail tongue 10 is set to the waveform of impacting for buffer gas flow, and the ripple of waveform internal face is arranged along the flow direction of air-flow.The internal face of snail tongue 10 is provided with multiple circular arc projection impacted for buffer gas flow, circular arc projection is along the flow direction of air-flow and/or arrange along the direction perpendicular with air flow direction.
The centrifugal blower of the present embodiment, comprises the above-mentioned afflux spiral case for centrifugal blower.
During enforcement, according to controlled rotation air flow principle, the spiral case that the utility model is used for centrifugal blower adopts subquadrate flaring runner Cross-section, and spiral case has following characteristics:
1, the spiral casing flow passage cross section of spiral case is subquadrate, and the paraxial limit (near the runner wall body of impeller shaft on spiral case) of spiral casing flow passage forms a positive circular body around impeller shaft line, and spiral casing flow passage sectional area expands gradually by setting rule.
Spiral casing flow passage has less moistening girth, reduces the surface friction drag of High Rotation Speed air-flow, turn avoid the manufacture technics difficulty of circular cross-section moulding.
2, form tunnel inlets 51 between the side of spiral casing flow passage paraxial limit the runner wall body of impeller shaft (on the spiral case near) and adjacent channels wall body, the air-flow that vane rotary exports enters the volute runner 3 of spiral case from tunnel inlets 51.The width of tunnel inlets 51 is wide intake grill, is also fixed width intake grill.
Make to enter spiral casing flow passage in an orderly manner from impeller high velocity air out, reduce the velocity gradient in runner and gradient width, thus decrease the transformation of energy of airflow kinetic energy thermotropism, improve the extension pressur efficiency of spiral case.
In addition, the impeller protecgulum on spiral case and the structural modality design of impeller bonnet, after installing rhombus ruggedized construction additional, make the rigidity of spiral case be greatly improved, and makes spiral case not only have collection wind diffusion function, also have the stressed function of framework.
Because the rigidity of spiral case improves, make the acoustical mass of spiral case have also been obtained raising, what reduce noise spreads out of intensity, decreases the generation of secondary noise.
This afflux spiral case is not only applicable to centrifugal blower, and the expansion wind being simultaneously also applicable to other High Rotation Speed mechanisms expands stream.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1., for an afflux spiral case for centrifugal blower, comprise impeller protecgulum (1), impeller bonnet (2) and volute runner (3),
Described impeller protecgulum (1) and described impeller bonnet (2) are covered in the central cavity of described volute runner (3) from the both sides of described volute runner (3) respectively,
Described impeller protecgulum (1), described impeller bonnet (2) and described volute runner (3) enclose the impeller cavity (4) formed for holding impeller,
It is characterized in that,
Described volute runner (3) the runner wall body of pressing close to described impeller cavity (4) forms a positive round around the impeller shaft of described impeller, and the runner wall body pressing close to described impeller cavity (4) offers a wide tunnel inlets (51) along the circumference of described impeller;
Described impeller protecgulum (1) and/or described impeller bonnet (2) are provided with for the vibration-reducing construction (5) that described impeller cavity (4) is eliminated the noise and cover body structure is reinforced.
2. the afflux spiral case for centrifugal blower according to claim 1, is characterized in that,
Described volute runner (3) offers the described runner exit (52) for drawing air-flow away from one end of described impeller cavity (4),
The radial cross section size of described volute runner (3) increases gradually along the air current flow direction in described volute runner (3).
3. the afflux spiral case for centrifugal blower according to claim 2, is characterized in that,
The radial cross-sectional shape of described volute runner (3) is rectangle;
The length dimension of the rectangular cross-section of described volute runner (3) increases gradually along the air current flow direction in described volute runner (3), and/or
The width dimensions of the rectangular cross-section of described volute runner (3) increases gradually along the air current flow direction in described volute runner (3).
4. the afflux spiral case for centrifugal blower according to claim 3, is characterized in that, the rotation angle position of the radial cross section of at least one section of described volute runner (3) is set to chamfering.
5. the afflux spiral case for centrifugal blower according to claim 1, is characterized in that,
Described impeller protecgulum (1) and/or described impeller bonnet (2) are disc,
Described vibration-reducing construction (5) is arranged at the outer surface away from described impeller cavity (4) on described disc,
Described vibration-reducing construction (5) is concave configuration and/or convex structure.
6. the afflux spiral case for centrifugal blower according to claim 5, is characterized in that,
Described concave configuration is at least one along the circular groove (6) circumferentially of described disc,
Described convex is configured to many rhombus muscle (7) be laid in described circular groove (6),
Described rhombus muscle (7) is laid and being circumferentially arranged along described disc along the radial direction of described disc.
7. the afflux spiral case for centrifugal blower according to any one of claim 1 to 6, is characterized in that,
Described runner exit (52) is connected to the air-flow output tube (8) of encorbelmenting,
The sectional shape of the first end of described air-flow output tube (8) is identical with the sectional shape of described runner exit (52),
The sectional shape of the second end of described air-flow output tube (8) is circular,
The sectional shape of the first end of described air-flow output tube (8) is to the sectional shape gradual change of the second end.
8. the afflux spiral case for centrifugal blower according to claim 7, is characterized in that, the second end of described air-flow output tube (8) is equipped with adpting flange (9).
9. the afflux spiral case for centrifugal blower according to claim 7, is characterized in that,
The connection part of described runner exit (52), described air-flow output tube (8) and described impeller cavity (4) three is provided with snail tongue (10);
The internal face of described snail tongue (10) is set to the waveform of impacting for buffer gas flow, and the ripple of waveform internal face is arranged along the flow direction of air-flow; Or
The internal face of described snail tongue (10) is provided with multiple circular arc projection impacted for buffer gas flow, described circular arc projection is along the flow direction of air-flow and/or arrange along the direction perpendicular with air flow direction.
10. a centrifugal blower, is characterized in that, comprises the afflux spiral case for centrifugal blower according to any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420596012.0U CN204253443U (en) | 2014-10-15 | 2014-10-15 | For afflux spiral case and the centrifugal blower of centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420596012.0U CN204253443U (en) | 2014-10-15 | 2014-10-15 | For afflux spiral case and the centrifugal blower of centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204253443U true CN204253443U (en) | 2015-04-08 |
Family
ID=52957756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420596012.0U Active CN204253443U (en) | 2014-10-15 | 2014-10-15 | For afflux spiral case and the centrifugal blower of centrifugal blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204253443U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132003A (en) * | 2014-07-30 | 2014-11-05 | 邵阳万脉科技有限公司 | Silencer of positive pressure ventilation equipment |
| CN106438485A (en) * | 2016-11-08 | 2017-02-22 | 广东美的厨房电器制造有限公司 | Volute of extractor hood and extractor hood |
| CN110454439A (en) * | 2019-09-24 | 2019-11-15 | 重庆通用工业(集团)有限责任公司 | A kind of spiral case |
| CN110454439B (en) * | 2019-09-24 | 2024-06-07 | 重庆通用工业(集团)有限责任公司 | Volute casing |
-
2014
- 2014-10-15 CN CN201420596012.0U patent/CN204253443U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132003A (en) * | 2014-07-30 | 2014-11-05 | 邵阳万脉科技有限公司 | Silencer of positive pressure ventilation equipment |
| CN104132003B (en) * | 2014-07-30 | 2016-08-17 | 邵阳万脉科技有限公司 | A kind of silencing means of positive airway pressure equipment |
| CN106438485A (en) * | 2016-11-08 | 2017-02-22 | 广东美的厨房电器制造有限公司 | Volute of extractor hood and extractor hood |
| CN110454439A (en) * | 2019-09-24 | 2019-11-15 | 重庆通用工业(集团)有限责任公司 | A kind of spiral case |
| CN110454439B (en) * | 2019-09-24 | 2024-06-07 | 重庆通用工业(集团)有限责任公司 | Volute casing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20210006483A (en) | Blower and outdoor unit of air conditioner having the same | |
| CN204646777U (en) | Radial flow impeller and fan unit | |
| CN103062112B (en) | Road cleaning equipment and centrifugal blower fan blade wheel thereof | |
| CN201679745U (en) | Low-noise axial flow fan for cooling air conditioner | |
| CN204253443U (en) | For afflux spiral case and the centrifugal blower of centrifugal blower | |
| CN203516203U (en) | Centrifugal fan, volute thereof and sweeper truck | |
| CN202326408U (en) | Efficient centrifugal ventilator blade structure | |
| CN104501381B (en) | Air-conditioner outdoor unit and its air outlet grate | |
| CN208778339U (en) | A kind of axial-flow windwheel and its axial flow blower of application | |
| CN203584898U (en) | Low-noise high-efficiency central air conditioner outdoor machine cooling axial-flow fan | |
| CN204755393U (en) | Centrifugation impeller and air conditioner | |
| CN106122090A (en) | Axial-flow windwheel and axial flow blower | |
| CN202056108U (en) | Fan device with noise reduction structure | |
| CN205639069U (en) | Movable vane, guiding subassembly and axial compressor cabinet -type air conditioner of axial compressor cabinet -type air conditioner | |
| CN109990328A (en) | A kind of range hood and its fan assembly | |
| CN205895693U (en) | Axial compressor wind wheel and axial fan | |
| CN201865968U (en) | Impeller used for electric drier | |
| CN202360431U (en) | Fan capable of preventing vane from removing | |
| CN205536023U (en) | Range hood is with going out fan housing | |
| CN109595186B (en) | High-efficiency fan | |
| CN104373390B (en) | Flow collector used for air flow guiding, volute assembly, centrifugal fan and air conditioner | |
| CN103629156B (en) | A kind of central air conditioner outdoor unit but axial-flow blower of low-noise high-efficiency | |
| CN211854246U (en) | Grid, outdoor unit and air conditioner | |
| CN207962776U (en) | A kind of range hood and its fan assembly | |
| CN204200702U (en) | For the slip ring of air conducting, spiral case assembly, centrifugal blower and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220322 Address after: 410100 Room 201, No. 39, East 10th line, Changsha area, China (Hunan) pilot Free Trade Zone, Changsha City, Hunan Province Patentee after: Changsha Fenfei environmental sanitation equipment Co.,Ltd. Address before: 410600 Chezhan Road, Ningxiang Economic Development Zone, Changsha City, Hunan Province Patentee before: CHANGSHA ZHONGLIANG MACHINE Co.,Ltd. |
|
| TR01 | Transfer of patent right |