CN220037048U - Fan system for range hood and range hood - Google Patents
Fan system for range hood and range hood Download PDFInfo
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- CN220037048U CN220037048U CN202321043345.6U CN202321043345U CN220037048U CN 220037048 U CN220037048 U CN 220037048U CN 202321043345 U CN202321043345 U CN 202321043345U CN 220037048 U CN220037048 U CN 220037048U
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- range hood
- fan system
- air inlet
- volute
- hood according
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- 230000008859 change Effects 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000009467 reduction Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 241000746998 Tragus Species 0.000 description 10
- 239000003517 fume Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Abstract
The utility model relates to a fan system for a range hood and the range hood, wherein the fan system comprises: the side wall of the volute is provided with an air inlet; the wind shield is arranged on the side wall of the volute in a mode of being close to or far away from the air inlet, and has a shielding state for shielding a part of area of the air inlet and a hiding state biased at one side of the air inlet along with the change of the moving position of the wind shield. The advantages are that: the fan system can adapt to different working conditions of the range hood, so that the air inlet reaches better air inlet conditions.
Description
Technical Field
The utility model relates to the technical field of range hoods, in particular to a fan system for a range hood and the range hood.
Background
A range hood is a kitchen appliance that purifies the kitchen environment. The fan system is a key device in the range hood, and the fan system of the range hood at present adopts a multi-wing centrifugal fan system with smaller volume, large flow and higher pressure, so that the gap between the current collector and the impeller is generally selected to be a fixed proper value in a certain range in order to adapt to the working condition of a public flue with equal width. Under the working condition that the back pressure at the air outlet of the range hood such as a high-rise flue and a public flue is large, obvious airflow can flow back to the current collector from the volute and then to the air inlet, so that the range hood oil-fume sucking effect is affected, and obvious howling can occur.
Therefore, the Chinese patent application with the application number of 202110560483.0 discloses an inlet current collecting device for a centrifugal fan and the centrifugal fan, wherein the inlet current collecting device for the centrifugal fan comprises a connecting section, a flow guiding section and a tragus section, the flow guiding section is connected with the outer wall surface of a volute at the inlet side of a volute of the fan through the connecting section, the flow guiding section is of a conical structure, a through hole is formed in the middle of the flow guiding section, the tragus section is an arc surface, the tragus section is arranged at the inner side of the flow guiding section, and the tragus section is molded by lofting a tragus molded line along the axis of an impeller of the centrifugal fan. By arranging the tragus section at the flow guiding section, the reverse flow caused by the cross of the leakage flow at the side of the inlet volute tongue and the inlet air flow is blocked by the tragus structure in the movement process, the flow is not mutually collided with the inlet air flow, the vortex generation and the kinetic energy loss are effectively controlled, and the aerodynamic performance and the fan noise are improved.
However, the fume exhaust in the above patent application has a certain disadvantage, because the above tragus section is fixed at the air inlet of the fan volute, under the working condition of having a certain back pressure, the collision between the back flow air flow and the inlet air flow can be reduced, so as to achieve the purpose of improving the aerodynamic performance and the fan noise, but under the working condition of not considering a smaller back pressure, the arrangement of the tragus section also affects the air inlet condition of the air inlet, in particular, affects the air inlet volume and the air inlet uniformity of the air inlet, therefore, the design of the tragus section is not suitable for different working conditions of the fume exhaust fan, and the air inlet of the fume exhaust fan is difficult to achieve relatively better air inlet conditions.
Disclosure of Invention
The first technical problem to be solved by the utility model is to provide a fan system for a range hood, which can adapt to different working conditions of the range hood and enable an air inlet to achieve better air inlet conditions.
The second technical problem to be solved by the utility model is to provide a range hood applying the fan system aiming at the current state of the art.
The utility model solves the first technical problem by adopting the technical scheme that: a blower system for a range hood, comprising:
the side wall of the volute is provided with an air inlet;
the wind shield is arranged on the side wall of the volute in a mode of being close to or far away from the air inlet, and at least has a shielding state for shielding a part of the area of the air inlet and a hiding state biased at one side of the air inlet along with the change of the moving position of the wind shield.
In order to drive the wind shield to move, the wind shield driving device further comprises a driving mechanism, wherein the power output end of the driving mechanism is connected with the wind shield, so that the wind shield is driven to switch between the shielding state and the hiding state.
In general, the driving mechanism can adopt a conventional motion mechanism formed by matching an electric push rod, a motor and a transmission mechanism, but in order to fully utilize the back pressure of the fan system under the actual working condition as a power source and simplify the structural consideration of the driving mechanism, the driving mechanism comprises a pneumatic push rod, the output end of the pneumatic push rod is connected with the wind shield, and an air pipe connected with the power input end of the pneumatic push rod extends to the air outlet of the fan system.
In order to selectively connect or disconnect the air pipe under different back pressure working conditions, and further enable the starting push rod to act so as to realize flexible switching of the wind shield between the shielding state and the hiding state, the air pipe is further provided with a pressure control valve for controlling on-off of the air pipe.
The above-mentioned pressure control valve may in principle be an electrically controlled valve, but in order to ensure the reliability of the valve opening and closing, the pressure control valve is a control valve that opens when a set pressure is reached.
The wind deflector may be provided on a side wall of the scroll case in a linearly movable manner, but in order to reduce a moving path of the wind deflector as much as possible so as to avoid interference with other components, the wind deflector is rotatably connected to the side wall of the scroll case with an axis perpendicular to the side wall of the scroll case as a rotation center.
Under the working condition of large back pressure, the motor is higher in rotating speed, large in air outlet resistance, small in effective air quantity (air quantity of air flow actually discharged under the working condition) when the range hood works, large in internal pressure of the volute, particularly in a surrounding area between an air outlet and a volute tongue, and capable of generating a backflow phenomenon, in order to effectively improve the backflow problem at the position, the volute is provided with the volute tongue, and the wind shield shields a part of area, adjacent to the volute tongue, of the air inlet under a shielding state. By means of the structural design, on one hand, air flow flowing back from the volute can be blocked, on the other hand, air inlet close to the volute tongue and the air outlet area can be isolated, and the two air flows are prevented from being converged to form 'pop' pneumatic noise.
In order to further improve the backflow problem, the wind shield is in a fan shape as a whole, and corners formed by two side edges of the wind shield in a shielding state are opposite to the center of an air inlet of the volute.
As an improvement, the device also comprises a current collector arranged at the air inlet of the volute, wherein the current collector is provided with an axial flow guiding part, and the inner peripheral wall of the axial flow guiding part is provided with bosses which are sequentially arranged along the circumferential direction of the axial flow guiding part and extend inwards in the radial direction.
The boss structure has the rectifying function, and can disturb the rotating vortex in the air inlet flow, so that the air inlet flow reduces resistance and the air inlet is smoother.
As an improvement, a noise reduction groove is formed in each boss at the leeward side edge of the boss, and the opening size of the noise reduction groove is gradually increased along the airflow flowing direction.
The noise reduction groove can rectify turbulence between the current collector and the air inlet of the impeller, so that fluid is smoother before entering the impeller.
In order to ensure uniformity of the inlet air flow, in the circumferential direction of the current collector, the size of a gap between two adjacent bosses is consistent with the size of the bosses in the circumferential direction of the current collector.
In order to ensure the rectifying effect, the axial flow guide of the current collector has a dimension in the axial direction of the current collector which corresponds to the dimension of the boss in the axial direction of the current collector.
The utility model solves the second technical problem by adopting the technical proposal that: a range hood comprising a fan system, characterized in that: the fan system adopts the fan system for the range hood.
Compared with the prior art, the utility model has the advantages that: the fan system can adapt to different working conditions of the range hood, so that the air inlet reaches better air inlet conditions: when the air outlet of the fan system has obvious resistance, the air outlet has larger pressure, the wind shield can be moved to a shielding state for shielding part of the area of the air inlet, and the collision between the reflux air flow and the inlet air flow is reduced, so that the pneumatic noise of 'pop' is eliminated; when the pressure at the air outlet of the fan system is small, the wind shield can be biased at one side of the air inlet to be in a hidden state, and in the hidden state, no influence is exerted on the air flow at the air inlet, and the air inlet of the range hood is smoother at the moment, so that the overall performance is better.
Drawings
FIG. 1 is a schematic perspective view of a fan system according to an embodiment of the present utility model (with a wind deflector in a blocking state);
FIG. 2 is a schematic perspective view of a fan system according to an embodiment of the present utility model (with a wind deflector in a hidden state);
FIG. 3 is a schematic view of a fan system according to another embodiment of the present utility model from another perspective (with the wind deflector in a hidden state);
fig. 4 is a schematic perspective view of a range hood according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present utility model, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the utility model may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.
Referring to fig. 1-4, a preferred embodiment of the present utility model is shown, a blower system for a range hood, comprising a volute 10, an impeller 14, a motor, and a wind deflector 20. An air inlet 11 is formed in the side wall of the volute 10, the impeller 14 is driven by a motor to rotate and is arranged in the volute 10, and an air inlet port is opposite to the air inlet 11 in the side wall of the volute 10. The volute 10 is also provided with an air outlet 12, and the annular wall of the volute 10 is provided with a volute tongue 13 adjacent to the air outlet 12.
A collector 30 is also provided at the inlet 11 of the volute 10. The current collector 30 of the present embodiment is integrated on the side wall of the volute 10 as a single piece. The collector 30 includes an annular mounting portion and an axial flow guiding portion 31 located inside the annular mounting portion, and the axial flow guiding portion 31 extends in a direction consistent with the axial direction of the impeller 14. The inner peripheral wall of the axial flow guiding portion 31 is provided with bosses 32 sequentially arranged along the circumferential direction, each boss 32 extends inward along the radial direction of the axial flow guiding portion 31, and the bosses 32 can be formed by stamping. The boss 32 has rectifying function, and can disturb the rotating vortex in the air flow, so that the resistance of the air flow is reduced, and the air is more smooth.
In order to ensure uniformity of the intake air flow, each boss 32 is uniformly arranged on the axial flow guiding portion 31 in the circumferential direction of the current collector 30, and a gap 33 is further provided between two adjacent bosses 32, wherein the size of the gap 33 between two adjacent bosses 32 is identical to the size of the boss 32 in the circumferential direction of the current collector 30. On the other hand, the axial flow guide 31 of the current collector 30 has the same dimension in the axial direction of the current collector 30 as the boss 32 in the axial direction of the current collector 30 to secure the rectifying effect.
In the preferred embodiment, each boss 32 is further provided with a noise reduction groove 320 at a leeward side edge thereof, and the opening size of the noise reduction groove 320 is gradually increased along the flow direction of the air flow, preferably a V-shaped groove. The noise reduction grooves 320 provided on the boss 32 rectify turbulence between the collector 30 and the intake air of the impeller 14, so that the fluid is smoother before entering the impeller 14.
A wind deflector 20 is further provided on the front side wall of the volute 10, wherein the plane of the wind deflector 20 is substantially flush with the plane of the front side wall of the volute 10. The wind deflector 20 of the present embodiment is generally fan-shaped and includes two side edges forming a rounded chamfer corner 200 at the inner ends thereof, and a circular arc-shaped outer edge connected between the outer ends of the two side edges. The curvature of the outer edge of the wind deflector 20 corresponds to the curvature of the axial flow guide 31 of the collector 30 at the inlet 11 of the volute 10. The wind deflector 20 is rotatably connected to the front side wall of the volute 10 on a rotating shaft 24 provided adjacent to the outer edge thereof, wherein the axis of the rotating shaft is perpendicular to the front side wall of the volute 10.
The front side wall of the volute 10 is also provided with a driving mechanism for driving the wind deflector 20 to rotate. The driving mechanism of this embodiment adopts a pneumatic push rod 21, the main body of the pneumatic push rod 21 is hinged on the front side wall of the volute 10, the power output end of the pneumatic push rod 21 is rotationally connected with the wind shield 20, and under the driving of the pneumatic push rod 21, the wind shield 20 has a shielding state (see fig. 1 in detail) for shielding a part of the area of the air inlet 11 and a hidden state (see fig. 2 in detail) biased at one side of the air inlet 11 along with the change of the moving position of the wind shield 20. More specifically, the corner 200 of the wind deflector 20 in the blocking state is opposed to the center of the air intake 11 of the scroll case 10.
The air push rod 21 of the present embodiment may employ various air push rod devices in the prior art, such as a piston type air push rod. The power input end (i.e., air inlet) of the air-driven push rod 21 is connected to an air pipe 22, and the other end of the air pipe 22 can extend to the air outlet 12 of the fan system, so that the air pressure at the air outlet 12 of the fan system is used as the power source of the air-driven push rod 21.
In order to selectively connect or disconnect the air pipe 22 under different back pressure working conditions, and further enable the push rod to be started to realize flexible switching of the wind shield 20 between the shielding state and the hiding state, the air pipe 22 of the embodiment is further provided with a pressure control valve 23 for controlling on-off of the air pipe 22, and the pressure control valve 23 is preferably a control valve which is opened when the set pressure is reached.
When the back pressure is small, the wind guard 20 can be driven by the pneumatic push rod 21 to be biased at one side of the air inlet 11, namely in the working state shown in fig. 2, at this time, the air inlet of the range hood is smoother, and the overall performance is better. When the air outlet 12 of the fan system has obvious resistance, namely, the back pressure is large, at the moment, the pressure control valve 23 is opened after reaching the pressure threshold value, the pneumatic push rod 21 is pushed to move to the state shown in fig. 1 by large pressure, and the wind shield 20 can separate two air flows to be converged, so that the pneumatic noise of pop is eliminated.
The embodiment also relates to a range hood, which comprises a casing 40 and a fan system arranged on the casing 40, wherein the fan system adopts the fan system, and as shown in fig. 4, in order to show the fan system inside the casing 40, the front side plate of the casing 40 is hidden.
Claims (13)
1. A blower system for a range hood, comprising:
the side wall of the volute (10) is provided with an air inlet (11);
characterized by further comprising:
the wind shield (20) is arranged on the side wall of the volute (10) in a mode of being close to or far away from the air inlet (11), and the wind shield (20) at least has a shielding state for shielding a part of the area of the air inlet (11) and a hiding state biased at one side of the air inlet (11) along with the change of the moving position of the wind shield.
2. The fan system for a range hood according to claim 1, wherein: the device also comprises a driving mechanism, wherein the power output end of the driving mechanism is connected with the wind deflector (20), so as to drive the wind deflector (20) to switch between the shielding state and the hiding state.
3. The fan system for a range hood according to claim 2, wherein: the driving mechanism comprises a pneumatic push rod (21), the output end of the pneumatic push rod (21) is connected with the wind shield (20), and an air pipe (22) connected with the power input end of the pneumatic push rod (21) extends to the air outlet (12) of the fan system.
4. A fan system for a range hood according to claim 3, wherein: the air pipe (22) is also provided with a pressure control valve (23) for controlling the on-off of the air pipe (22).
5. The fan system for a range hood according to claim 4, wherein: the pressure control valve (23) is a control valve that opens when a set pressure is reached.
6. The fan system for a range hood according to any one of claims 1 to 5, wherein: the wind shield (20) is rotationally connected to the side wall of the volute (10) by taking an axis perpendicular to the side wall of the volute (10) as a rotation center.
7. The fan system for a range hood according to any one of claims 1 to 5, wherein: the volute (10) is provided with a volute tongue (13), and the wind shield (20) shields a part of the area of the air inlet (11) adjacent to the volute tongue (13) in a shielding state.
8. The fan system for a range hood according to claim 7, wherein: the wind deflector (20) is in a fan shape as a whole, and corners (200) formed by two side edges of the wind deflector (20) in a shielding state are opposite to the center of an air inlet (11) of the volute (10).
9. The fan system for a range hood according to any one of claims 1 to 5, wherein: the device also comprises a current collector (30) arranged at the air inlet (11) of the volute (10), wherein the current collector (30) is provided with an axial flow guiding part (31), and the inner peripheral wall of the axial flow guiding part (31) is provided with bosses (32) which are sequentially arranged along the circumferential direction and extend inwards in the radial direction.
10. The fan system for a range hood according to claim 9, wherein: a noise reduction groove (320) is formed in each boss (32) at the leeward side edge of the boss, and the opening size of the noise reduction groove (320) is gradually increased along the airflow flowing direction.
11. The fan system for a range hood according to claim 9, wherein: in the circumferential direction of the current collector (30), the size of a gap (33) between two adjacent bosses (32) is consistent with the size of the bosses (32) in the circumferential direction of the current collector (30).
12. The fan system for a range hood according to claim 9, wherein: the axial flow guiding part (31) of the current collector (30) has the same size in the axial direction of the current collector (30) as the boss (32) has in the axial direction of the current collector (30).
13. A range hood comprising a fan system, characterized in that: the fan system employs the fan system for range hood according to any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321043345.6U CN220037048U (en) | 2023-04-29 | 2023-04-29 | Fan system for range hood and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321043345.6U CN220037048U (en) | 2023-04-29 | 2023-04-29 | Fan system for range hood and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220037048U true CN220037048U (en) | 2023-11-17 |
Family
ID=88727093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321043345.6U Active CN220037048U (en) | 2023-04-29 | 2023-04-29 | Fan system for range hood and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220037048U (en) |
-
2023
- 2023-04-29 CN CN202321043345.6U patent/CN220037048U/en active Active
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