CN215723432U - Retaining ring, blowing prewhirl device and range hood - Google Patents
Retaining ring, blowing prewhirl device and range hood Download PDFInfo
- Publication number
- CN215723432U CN215723432U CN202121864004.6U CN202121864004U CN215723432U CN 215723432 U CN215723432 U CN 215723432U CN 202121864004 U CN202121864004 U CN 202121864004U CN 215723432 U CN215723432 U CN 215723432U
- Authority
- CN
- China
- Prior art keywords
- air
- air inlet
- ring
- flow
- retainer ring
- 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
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a fixed check ring, a blowing prerotation device and a range hood, and relates to the technical field of kitchen appliances, wherein the fixed check ring comprises an air guide ring and a flow deflector; the air guide ring is provided with a cavity with an opening at one side, and an air inlet communicated with the cavity is arranged on the air guide ring; the flow deflectors are arranged into a plurality of pieces, and the flow deflectors are arranged in the cavity at intervals along the circumferential direction; the air flow enters the cavity from the air inlet and forms pre-swirl air flow after being rectified by the flow deflector. The blowing prerotation device comprises a fixed retainer ring. The range hood comprises a blowing prerotation device. The technical problem of air current flow uneven caused by obstructed air current flow at the air inlet position of the air channel assembly in the prior art is solved.
Description
Technical Field
The utility model relates to the technical field of kitchen appliances, in particular to a fixed check ring, a blowing prerotation device and a range hood.
Background
The smoking effect is one of the important indexes of the quality of the range hood, and the smoking effects are different due to different structures of the range hood. Wherein multi-wing centrifugal fan plays decisive role as core component to range hood's smoking effect.
When fluid flows through an object, the velocity of the fluid near the surface of the object is zero due to the viscosity of the fluid itself, while the velocity of the fluid at a distance from the surface of the object is not affected by the viscosity until the fluid micelles can no longer advance on the object surface, which is called boundary layer separation. Due to the inner cavity structure of the range hood, airflow flow at an air inlet of the volute is blocked, a low-speed vortex area is generated at one side of the air inlet, airflow flow at the air inlet is not uniform, the effective area of uniform sealing is reduced in the area, and the smoking effect is influenced; furthermore, the airflow of the blade flow channel near the low-speed vortex area can be severely separated, the vortex impact noise in the flow channel is enhanced, the effective flow area of the flow channel is small, and the efficiency of the fan and the smoking effect are reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fixed retainer ring, a blowing prerotation device and a range hood, which are used for relieving the technical problem of uneven airflow flow caused by airflow flow obstruction at an air duct air inlet of an air duct assembly in the prior art.
In a first aspect, the present invention provides a method comprising: the wind guide ring and the guide vane;
the air guide ring is provided with a cavity with an opening at one side, and an air inlet communicated with the cavity is formed in the air guide ring;
the flow deflectors are arranged in a plurality of pieces, and the flow deflectors are arranged in the cavity at intervals along the circumferential direction;
the air flow enters the cavity from the air inlet and forms pre-swirl air flow after being rectified by the flow deflector.
Further, the air guide ring comprises a top end retainer ring, a circumferential retainer ring and a bottom end retainer ring;
the circumferential retainer ring is fixedly connected between the top end retainer ring and the bottom end retainer ring, and the top end retainer ring, the bottom end retainer ring and the circumferential retainer ring form a cavity;
the air inlet is arranged on the circumferential retainer ring.
Furthermore, the inner wall surface of the top end retainer ring is an arc-shaped surface which is convex outwards.
Further, the arc-shaped surface is set to be an inverted U-shaped surface.
Furthermore, the bottom end retainer ring adopts a retainer ring flange and is used for being connected to the air inlet of the air duct assembly.
Furthermore, the two oppositely arranged flow deflectors are centrosymmetric relative to the center of the air guide ring, and the inclination directions of the flow deflectors along the circumferential direction of the air guide ring are the same;
the inclination angle of the guide vane is consistent with the outlet angle of the impeller of the air duct assembly.
Furthermore, the number of the flow deflectors is not less than 20.
Has the advantages that:
according to the fixed check ring provided by the utility model, the air guide ring is provided with the cavity with one side opened, and the plurality of flow deflectors are arranged in the cavity at intervals along the circumferential direction; because the air guide ring is provided with the air inlet communicated with the cavity, the air flow can enter the cavity through the air inlet and forms pre-swirl air flow after being rectified by the flow deflector; when specifically using, can install this retaining ring in the air intake department of fan subassembly, under this kind of circumstances, this prewhirl air current has the rotatory motion state of the impeller or the reverse motion degree that are close to the wind channel subassembly and weakens, can break away near low-speed vortex region in wind channel air intake department of wind channel subassembly, and the intensive mixing inlet flow for it is even to admit air, is difficult for taking place the separation after getting into the wind channel subassembly, and then noise reduction, lifting feature, reinforcing smoking effect.
In a second aspect, the present invention provides an air blowing prerotation device, comprising: a tubing assembly, a blower, and a retaining collar of any of the preceding embodiments;
the pipeline assembly comprises an air inlet pipe, and an outlet of the air inlet pipe is communicated with the air inlet in a tangent mode;
the blower is communicated with the air inlet pipe;
the air guide ring can rotate relative to the air inlet pipe, and tangential air flow is formed at the communication position of the air inlet pipe and the air inlet by air flow sent by the blower.
Furthermore, the air inlet pipes are arranged into a plurality of groups, and the outlets of the air inlet pipes are circumferentially arranged at intervals;
the air inlets are arranged in a plurality and correspond to the outlets of the air inlet pipes in a one-to-one manner;
the tangential airflows formed by the air inlet pipes and the corresponding air inlets in multiple groups have the same pre-rotation direction of pre-rotation airflows formed after rectification by the flow deflectors.
Furthermore, inlets of a plurality of groups or two groups of air inlet pipes are connected with the same blower.
Has the advantages that:
the blowing pre-rotation device provided by the utility model comprises the fixed check ring, so that the technical advantages and effects which can be achieved by the blowing pre-rotation device also comprise the technical advantages and effects which can be achieved by the fixed check ring, and are not repeated herein.
In a third aspect, the present invention provides a range hood, comprising: a cigarette maker housing, an air duct assembly and the air blowing pre-rotation device of any one of the preceding embodiments;
the air duct assembly is mounted on the cigarette machine shell;
the air duct assembly comprises an impeller, and the air guide ring is arranged at the air inlet position of the impeller and is coaxial with the impeller.
Further, the blower is mounted on the outer wall of the shell of the cigarette machine.
Has the advantages that:
the range hood provided by the utility model comprises the blowing pre-rotation device, so that the technical advantages and effects of the range hood also comprise the technical advantages and effects of the blowing pre-rotation device, and are not described in detail herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a retaining ring according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a retaining ring;
FIG. 3 is a schematic structural diagram of an air blowing pre-rotation device according to an embodiment of the present invention;
FIG. 4 is a schematic view of a connection structure of the air blowing pre-rotation device and the air duct assembly according to an embodiment of the present invention;
fig. 5 is a schematic view of a flow deflector structure and principle of the blowing prerotation device provided by the embodiment of the utility model;
FIG. 6 is a schematic diagram comparing the principle of the device without blowing pre-rotation and the device with blowing pre-rotation;
fig. 7 is a schematic partial structure diagram of a range hood according to an embodiment of the present invention.
Icon:
100-fixing a retainer ring; 110-a top end retainer ring; 120-circumferential retaining ring; 130-bottom end retainer ring; 140-flow deflectors; 121-air inlet; 131-bolt holes;
200-an air inlet pipe; 210-an outlet;
300-a blower;
400-a cigarette machine housing;
500-an air duct assembly; 510-impeller.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1 and fig. 2, the present embodiment provides a retaining ring, where the retaining ring 100 includes a wind-guiding ring and a flow deflector 140; the air guide ring is provided with a cavity with an opening at one side, and an air inlet 121 communicated with the cavity is arranged on the air guide ring; the flow deflectors 140 are arranged in a plurality of pieces, and the flow deflectors 140 are arranged in the cavity at intervals along the circumferential direction; the air flow enters the cavity from the air inlet 121 and forms pre-swirl air flow after being rectified by the flow deflector 140.
In the fixed retainer ring 100 provided in this embodiment, the air guide ring has a cavity with an opening on one side, and the plurality of flow deflectors 140 are circumferentially arranged in the cavity at intervals; because the air guide ring is provided with the air inlet 121 communicated with the cavity, air flow can enter the cavity through the air inlet 121 and form pre-swirl air flow after being rectified by the flow deflector 140; when specifically using, can install this retaining ring 100 in the air intake 121 department of fan subassembly, under this kind of circumstances, this prewhirl air current has and is close the rotatory motion state of the impeller 510 of wind channel subassembly 500 or reverse motion degree weakens, can break away the near low-speed vortex region of wind channel air inlet department of wind channel subassembly 500, and the intensive mixing intake flow for it is even to admit air, is difficult for taking place the separation after getting into wind channel subassembly 500, and then reduces the noise, the lifting performance, reinforcing smoking effect.
Specifically, the air guide ring comprises a top end retainer ring 110, a circumferential retainer ring 120 and a bottom end retainer ring 130; the circumferential retainer ring 120 is fixedly connected between the top end retainer ring 110 and the bottom end retainer ring 130, and a cavity is formed by the three parts; the air inlet 121 is opened in the circumferential retainer ring 120.
Through the aforesaid setting, not only can form the cavity that is difficult for making the air current to escape, simultaneously, fix the water conservancy diversion piece 140 between top retaining ring 110 and bottom retaining ring 130, can also improve the fixed stability of water conservancy diversion piece 140.
Referring to fig. 2, the inner wall surface of the top end retainer ring 110 is a convex arc surface, which can guide the incoming tangential airflow, similar to a common blower inlet retainer ring.
Optionally, the arc-shaped surface is set as an inverted U-shaped surface; compared with a traditional air duct retainer ring forming cavity structure, the inverted U-shaped pull-up structure can provide a flow channel for air entering from the air inlet 121, and ensures that blown pre-swirl air flows along the circumferential direction of the inverted U-shaped surface.
Further, the bottom end retainer ring 130 is a retainer ring flange and is used for connecting to the air inlet position of the air duct assembly 500; so configured, the fixing of the retaining ring 100 may be facilitated.
Specifically, referring to fig. 4, the bottom end retainer ring 130 is provided with a bolt hole 131, and the air inlet of the air duct assembly 500 is provided with a corresponding mounting hole; the bolts are inserted through the bolt holes 131 and the mounting holes, so that the fixing retainer ring 100 can be fixedly connected to the air inlet of the air duct assembly 500. The bolt connection is adopted, so that not only can the connection stability and reliability of the fixed retainer ring 100 be improved, but also the disassembly and assembly operation is more convenient, and time and labor are saved.
In this embodiment, the number of the flow deflectors 140 is not less than 20, that is, not less than 20; when the circumferential size of the wind guide ring is constant, the gap between two adjacent guide vanes 140 can be relatively reduced as the number of the guide vanes 140 increases.
Referring to fig. 3 and 4, the present embodiment provides an air blowing pre-rotation device including a fixing collar 100, a pipe assembly, and a blower 300; the pipeline assembly comprises an air inlet pipe 200, and an outlet 210 of the air inlet pipe 200 is communicated with the air guide ring in a tangent mode; the blower 300 is communicated with the air inlet pipe 200; the air guiding ring can rotate relative to the air inlet pipe 200, and the air flow sent by the blower 300 forms tangential air flow at the communication position of the air inlet pipe 200 and the air guiding ring, and forms pre-swirl air flow after being rectified by the flow deflector 140.
When the blower 300 is used, the blower 300 can be started, the blower 300 blows air into the air inlet pipe 200, and since the outlet 210 of the air inlet pipe 200 is communicated with the air inlet 121 in a tangential manner, the air flow sent by the blower 300 can form tangential air flow at the communication position of the air inlet pipe 200 and the air inlet 121, and meanwhile, pre-swirl air flow can be formed after the flow deflector 140 is rectified.
When the air blowing pre-rotation device is applied to the air inlet position of the air duct assembly 500, the pre-rotation airflow has a motion state close to the rotation of the impeller 510 of the air duct assembly 500 or has a reduced reverse motion degree (see fig. 6), so that a low-speed vortex area near the air inlet of the air duct assembly 500 can be dispersed, air inflow is fully mixed, air is uniform, separation is not easy to occur after entering the air duct assembly 500, and then noise is reduced, performance is improved, and a smoking effect is enhanced.
It should be noted that, referring to fig. 6 (the impeller 510 is rotating along the index), when the air duct assembly 500 is not equipped with the blowing pre-rotation device, the inlet air flow has a motion against the rotation direction of the impeller 510 relative to the impeller 510, so as to generate a larger air flow attack angle, and thus generate separation on the suction surface of the impeller 510; when the air duct assembly 500 is installed with the air blowing prerotation device, the intake air has the same movement tendency as the rotation direction of the impeller 510 or the reverse movement degree is weakened before entering the air duct assembly 500, so that the separation is not easily generated.
Specifically, the airflow is blown out from the outlet 210 of the air inlet pipe 200 in a direction parallel to the linear velocity of the impeller 510, a horizontal tangential force in the same direction as the linear velocity is applied to the airflow for supplying air to the air duct of the air duct assembly 500, the intake airflow is simultaneously subjected to the suction force of the air duct assembly 500, and under the combined action of the two forces, the intake airflow rotates into the air duct assembly 500, and the airflow has a movement tendency consistent with or close to the rotation direction of the impeller 510 when entering the air duct assembly 500.
Referring to fig. 4 and 5, the impeller 510 shown in fig. 4 is rotated clockwise, and the air blowing pre-rotation device is capable of generating a pre-rotation air flow along the needle.
Further, the inclination angle of the guide vanes 140 is consistent with the outlet angle of the impeller 510 of the air duct assembly 500, the guide vanes 140 are arc-shaped and forward-facing, two guide vanes 140 which are oppositely arranged are centrosymmetric with respect to the center of the air guide ring, and the inclination directions of the guide vanes 140 along the circumferential direction of the air guide ring are the same.
Wherein the impeller 510 is a multi-wing centrifugal impeller 510.
During specific work, airflow enters a cavity formed by the fixed retainer ring 100 through the air inlet pipe 200, is rectified by the flow deflectors 140, is uniformly blown into an air inlet position of the air duct assembly 500, is converged and interacted with inlet airflow, disperses a low-speed vortex area, and fully mixes the inlet airflow, so that the air inlet mode of the air duct assembly 500 is more uniform.
Referring to fig. 3, the air inlet pipes 200 are arranged in a plurality of groups, and outlets 210 of the plurality of groups of air inlet pipes 200 are circumferentially spaced; a plurality of air inlets 121 on the fixed retainer 100 are arranged and are in one-to-one correspondence with the outlets 210 of the plurality of groups of air inlet pipes 200; the tangential airflows formed by the multiple groups of air inlet pipes 200 and the corresponding air inlets 121 have the same pre-rotation direction of the pre-rotation airflow formed after rectification by the flow deflectors 140, so as to ensure that stable pre-rotation airflow with the same direction is provided for the air duct assembly.
Further, the inlet ends of multiple sets or two sets of air inlet ducts 200 are connected to the same blower 300.
In one embodiment of the present application, the blowers 300 are arranged in two groups and the air inlet ducts 200 are arranged in four groups, wherein the two air inlet ducts 200 share one blower 300. Of course, the blowers 300 may be arranged in four sets, i.e., one set of blowers 300 for each set of air inlet ducts 200.
Further, when the air inlet ducts 200 are provided in four groups, the angle between two adjacent outlets 210 of the air inlet ducts 200 may be 90 °.
Referring to fig. 3, the arrangement of the four air inlet pipes 200 and the extending shape of the air inlet pipes 200 are not limited to the type shown in fig. 3, and it is within the scope of the present invention to provide a tangential air flow form at the connection between the air inlet pipes 200 and the air guiding ring.
Referring to fig. 7, the embodiment further provides a range hood, which includes a range hood housing 400, an air duct assembly 500 and the aforementioned blowing pre-rotation device; the air duct assembly 500 is mounted to the cigarette maker housing 400; the air duct assembly 500 includes an impeller 510, and the air guiding ring is installed at an air inlet of the impeller 510 and is coaxial with the impeller 510.
Further, in order to improve the effect of oil smoke absorption, the circumferential dimension of the air guide ring is matched with the circumferential dimension of the impeller 510.
In some technologies, the prerotation device seriously hinders the air inlet area of the fan inlet, even if the prerotation effect is achieved, when the air flow is close to the air duct assembly, continuous external force does not work, the prerotation effect is weakened, and due to the high-speed rotation of the impeller, the movement effect of the air flow deviating from the rotation is weakened and is not significant. This embodiment is through the mode of blowing, lasts to irritate initiative air current, strengthens prewhirl effect to do not have prewhirl blade, do not influence fan air inlet area.
Referring to fig. 7, the range hood of the present embodiment does not generate a large-area projection of the flow deflector 140 at the impeller intake position of the impeller 510, so that the intake area at the impeller intake position is not affected; the tangential air flow is blown out through the blowing pre-rotation device, the low-speed vortex area near the impeller air inlet of the impeller 510 can be dispersed, the air flow provides a horizontal tangential force for the air inlet flow, and the air inlet flow is continuous and effective, under the combined action of the suction force of the air duct assembly 500, the air inlet flow has the motion trend close to the rotation direction of the impeller 510, the air inlet flow can be fully mixed, the air inlet of the air duct assembly 500 is more uniform, the air flow separation phenomenon of the air duct assembly 500 is weakened, the fan performance is improved, the vortex impact noise of a flow channel is reduced, and the smoking effect of the range hood is enhanced.
Further, the blower 300 is mounted on the outer wall of the cigarette machine shell 400, so that not only can the complicated airflow in the cigarette machine shell 400 be avoided, but also the interference of the blower 300 on the flow in the cigarette machine shell 400 can be avoided; moreover, the blower 300 is also easily removable and does not occupy the interior space of the cigarette machine housing 400.
Alternatively, the blower 300 may be mounted to the top and side walls of the cigarette machine housing 400.
By setting some parameters and utilizing numerical analysis software, numerical simulation is carried out on the range hood which is not provided with or provided with the blowing prerotation device, and the following conclusion is obtained:
under certain range hood structures, the air inlet mode at the air inlet position of the air duct assembly 500 is not uniform, and a significant low-speed vortex area exists, and a significant separation phenomenon occurs in the adjacent flow channels of the impeller 510.
In the absence of a blowing prerotation device, the inlet airflow has a movement away from the direction of rotation of the impeller 510; when the airflow moves in a direction away from the direction of rotation of the impeller 510 before entering the impeller 510, a large angle of attack of the airflow is created, creating a significant separation at the suction side of the impeller 510.
In the case of the blowing pre-rotation device, the air flow is deflected to a direction close to the rotation direction before entering the impeller 510, and separation is not easy to occur.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. A retaining ring, comprising: a wind guide ring and a guide vane (140);
the air guide ring is provided with a cavity with an opening at one side, and an air inlet (121) communicated with the cavity is formed in the air guide ring;
the flow deflectors (140) are arranged into a plurality of pieces, and the flow deflectors (140) are arranged in the cavity at intervals along the circumferential direction;
the air flow enters the cavity from the air inlet (121) and forms pre-rotation air flow after being rectified by the flow deflector (140).
2. The fixed retainer ring of claim 1, wherein the wind-guiding ring comprises a top end retainer ring (110), a circumferential retainer ring (120), and a bottom end retainer ring (130);
the circumferential retainer ring (120) is fixedly connected between the top end retainer ring (110) and the bottom end retainer ring (130), and the top end retainer ring, the bottom end retainer ring and the bottom end retainer ring define a cavity;
the air inlet (121) is formed in the circumferential retainer ring (120).
3. The retaining ring of claim 2, characterized in that the inner wall surface of the top end retaining ring (110) is a convex arc surface.
4. The retaining collar of claim 3, wherein the arcuate surface is configured as an inverted "U" profile.
5. The retaining collar of claim 2, wherein the bottom end collar (130) is a collar flange for connecting to an air duct inlet of the air duct assembly (500).
6. The fixed baffle ring as claimed in any one of claims 1 to 5, wherein the two oppositely arranged flow deflectors (140) are centrosymmetric relative to the center of the wind-guiding ring, and the inclination directions of the flow deflectors (140) along the circumferential direction of the wind-guiding ring are the same;
the inclination angle of the guide vane (140) is consistent with the outlet angle of the impeller (510) of the air duct assembly (500).
7. Retaining ring according to claim 6, characterized in that the number of flow deflectors (140) is not less than 20.
8. A device for blowing pre-rotation, comprising: a duct assembly, a blower (300) and a retaining collar of any of claims 1-7;
the pipeline assembly comprises an air inlet pipe (200), and an outlet (210) of the air inlet pipe (200) is tangentially communicated with the air inlet (121);
the blower (300) is communicated with the air inlet pipe (200);
the air guide ring can rotate relative to the air inlet pipe (200), and tangential air flow is formed at the communication position of the air inlet pipe (200) and the air inlet (121) by air flow sent by the blower (300).
9. The blowing preswirl device of claim 8, wherein the air inlet pipes (200) are arranged in a plurality of groups, and outlets (210) of the air inlet pipes (200) of the plurality of groups are circumferentially spaced;
the air inlets (121) are arranged in a plurality and are arranged corresponding to the outlets (210) of the air inlet pipes (200) in a one-to-one manner;
the tangential airflows formed by the air inlet pipes (200) and the corresponding air inlets (121) have the same pre-rotation direction of pre-rotation airflows formed after rectification by the flow deflectors (140).
10. The blowing preswirl device of claim 9, wherein the inlets of multiple or two sets of the air inlet pipes (200) are connected to the same blower (300).
11. A range hood, comprising: a cigarette maker housing (400), a duct assembly (500) and the insufflation preswirl device of any one of claims 8-10;
the air duct assembly (500) is mounted to the cigarette maker housing (400);
the air duct assembly (500) comprises an impeller (510), and the air guide ring is installed at an impeller air inlet position of the impeller (510) and is coaxially arranged with the impeller (510).
12. The range hood of claim 11, wherein the blower (300) is mounted to an outer wall of the range hood housing (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121864004.6U CN215723432U (en) | 2021-08-10 | 2021-08-10 | Retaining ring, blowing prewhirl device and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121864004.6U CN215723432U (en) | 2021-08-10 | 2021-08-10 | Retaining ring, blowing prewhirl device and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215723432U true CN215723432U (en) | 2022-02-01 |
Family
ID=79994553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121864004.6U Active CN215723432U (en) | 2021-08-10 | 2021-08-10 | Retaining ring, blowing prewhirl device and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215723432U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446648A (en) * | 2021-08-10 | 2021-09-28 | 杭州老板电器股份有限公司 | Retaining ring, blowing prewhirl device and range hood |
-
2021
- 2021-08-10 CN CN202121864004.6U patent/CN215723432U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446648A (en) * | 2021-08-10 | 2021-09-28 | 杭州老板电器股份有限公司 | Retaining ring, blowing prewhirl device and range hood |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202926712U (en) | Impeller and centrifugal blower including the same | |
| EP1979623B1 (en) | Improved impeller and fan | |
| CN108252949A (en) | Mixed flow wind wheel and flow-mixing blower fan | |
| WO2023124700A1 (en) | Combined blade device and combined air outlet device | |
| CN101270761A (en) | Centrifugal blower and air conditioner having the same | |
| KR20150030697A (en) | Oblique flow fan, oblique flow blower and air conditioning indoor unit having same | |
| CN107339259B (en) | Multi-wing centrifugal fan | |
| CN215723432U (en) | Retaining ring, blowing prewhirl device and range hood | |
| CN108412809A (en) | Flow guide ring, centrifugal fan and air conditioner | |
| KR101294324B1 (en) | Local ventilator with swirler | |
| CN108953222B (en) | Centrifugal impeller | |
| CN107339241B (en) | Multi-wing centrifugal fan | |
| WO2024051360A1 (en) | Electric motor and fan | |
| KR101294325B1 (en) | Local ventilator with swirler | |
| CN210531228U (en) | Impeller of multi-wing centrifugal fan and bathroom heater | |
| WO2023202327A1 (en) | Combined fan blade structure and air outlet device | |
| CN209984154U (en) | High-speed dust collector motor | |
| CN113446648A (en) | Retaining ring, blowing prewhirl device and range hood | |
| CN114616426A (en) | Diffuser, diffuser assembly and air conditioner having the same | |
| CN216812271U (en) | Combined type fan blade and combined air outlet device | |
| CN110360631A (en) | A kind of Portable kitchen ventilator | |
| KR20200037945A (en) | fan assembly | |
| CN215293004U (en) | Blade, impeller, centrifugal fan and range hood | |
| CN216111362U (en) | Volute type energy-saving fan | |
| CN111577653A (en) | Impeller and centrifugal fan with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |