CN204402949U - Ventilation fan - Google Patents
Ventilation fan Download PDFInfo
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- CN204402949U CN204402949U CN201420847011.9U CN201420847011U CN204402949U CN 204402949 U CN204402949 U CN 204402949U CN 201420847011 U CN201420847011 U CN 201420847011U CN 204402949 U CN204402949 U CN 204402949U
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- flabellum
- outstanding wall
- intake grill
- exhaust outlet
- tongue
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Abstract
A kind of ventilation fan, comprise framework and multi-wing centrifugal fan, described hodmadod comprises the upper snail coverboard that can be arranged in parallel up and down, lower snail coverboard, periphery wall is formed between snail coverboard and lower snail coverboard on described, and connect the roll bending of multi-wing centrifugal fan tongue and exhaust outlet, with the intake grill being located at described lower snail coverboard place, the back side of lower snail coverboard is provided with larger than the external diameter of described flabellum, be concentrically ringed outstanding wall with described flabellum, described outstanding wall comprises from described tongue to the scope relative with the expansion section of roll bending, and this outstanding wall is that the opposite direction of rotating along flabellum from described tongue is in the annular wall of a part of scope breach, this outstanding wall extends to the position filling up gap between described intake grill upper end and flabellum on the axle direction of described motor.The utility model has the advantage of, wind can be made to flow out to exhaust outlet from the annular wall of breach swimmingly, improve air quantity, reduce noise.
Description
Technical field
The utility model about a kind of ventilation fan, particularly about the ceiling imbedded formula ventilation fan of one.
Background technique
The ventilation fan of prior art, is described for Chinese patent ZL201310104661.4.Fig. 1 is the schematic diagram of prior art.As shown in Figure 1, described ventilation fan, comprises framework 100, is located at the hodmadod 130 of framework 100 inside and is provided with the multiple-wing fan 150 of flabellum 120; Described hodmadod 130 comprises housing 134, intake grill 131 and exhaust outlet (not shown); Flabellum 120 is located in housing 134 along the vertical direction, and when flabellum 120 rotates, the wind sucked from intake grill 131 is discharged to outdoor by exhaust outlet.
For avoiding touching of the flabellum 120 of rotation, between flabellum 120 and intake grill 131, certain gap must be reserved.When connection the piping outside the house is longer or external wind pressure is larger, easily there is adverse current in the air of discharge, then by above-mentioned clearance backflow to intake grill 131 place, and then inconsistent with the suction air-flow at intake grill 131 place, produce abnormal sound.
Therefore, in hodmadod 130, flabellum 120 periphery forms circular outstanding wall 160.That is, the inner side of hodmadod 130 has the downside 1302 of the high side 1301 of the end formation of circular outstanding wall 160 and the end formation of intake grill 131, and the forward end of intake grill 131 side of multiple-wing fan 150 forms hollow structure.The lower end of described multiple-wing fan 150 is inserted inside described outstanding wall 160.
The lower end of described like this flabellum 120 is inserted inside outstanding wall 160, the lower end of flabellum 120 and outstanding wall 160 overlap.
When connection the piping outside the house is longer or external wind pressure is larger, even if adverse current appears in the air of discharging, outstanding wall 160 also can shelter from, and prevents crushing from increasing, and the stream pressure at intake grill 131 place is increased and reduces noise.
Ventilation fan in background technique, effectively can reduce noise when external wind pressure (or resistance) is larger.
But known through studying in great detail, the larger impact of external wind pressure (or resistance) on the whole periphery of flabellum 120 is not the same.That is, sometimes blow to the air meeting of exhaust outlet from flabellum 120 because colliding the build-up of pressure loss on the contrary of outstanding wall 160, air quantity lowers, and noise increases.
Model utility content
The purpose of this utility model is to provide a kind of ceiling imbedded formula ventilation fan reducing noise.
For achieving the above object, the utility model provides a kind of ventilation fan, comprise framework and the multi-wing centrifugal fan being located at described lower portion, described multi-wing centrifugal fan comprises hodmadod and is positioned at the flabellum of hodmadod inside, motor, described hodmadod comprises the upper snail coverboard that can be arranged in parallel up and down, lower snail coverboard, periphery wall is formed between snail coverboard and lower snail coverboard on described, and connect the roll bending of multi-wing centrifugal fan tongue and exhaust outlet, with the intake grill being located at described lower snail coverboard place, gap is provided with between described intake grill upper end and described flabellum, described intake grill extends out from the surface of the inner snail coverboard downwards of hodmadod, the back side of lower snail coverboard is provided with larger than the external diameter of described flabellum, be concentrically ringed outstanding wall with described flabellum, described outstanding wall comprises from described tongue to the scope relative with the expansion section of roll bending, and this outstanding wall is that the opposite direction of rotating along flabellum from described tongue is in the annular wall of a part of scope breach, this outstanding wall extends to the position filling up gap between described intake grill upper end and flabellum on the axle direction of described motor.
The utility model has the advantage of, wind can be made to flow out to exhaust outlet from breach swimmingly, improve air quantity, reduce noise.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of prior art;
Fig. 2 is overall schematic of the present utility model;
Fig. 3 is the plan view that the utility model removes framework;
Fig. 4 is the schematic perspective view removing framework of the present utility model;
Fig. 5 is the sectional view removing framework of the present utility model.
Embodiment
Fig. 2 is overall schematic of the present utility model; Fig. 3 is the plan view that the utility model removes framework; Fig. 4 is the schematic perspective view that the utility model removes framework; Fig. 5 is the sectional view that the utility model removes framework.
Ventilation fan of the present utility model, comprises all products utilizing flabellum to realize ventilation or indoor air circulation function.As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, the ventilation fan 1 of the present embodiment is for being provided with the heating and ventilating fan of two flabellums 103,13 (heating and ventilation are used), the utility model is described ventilation part, so Fig. 3 ~ Fig. 5 only shows the part of ventilation flabellum 13.
Ventilation fan 1 comprises framework 10 and is located at the multi-wing centrifugal fan 11 of described framework 10 inside, described multi-wing centrifugal fan 11 comprises hodmadod 12 and is positioned at the flabellum 13 of hodmadod 12 inside, motor 14, described hodmadod 12 comprises the upper snail coverboard 121 that can be arranged in parallel up and down, lower snail coverboard 122, periphery wall is formed between snail coverboard 121 and lower snail coverboard 122 on described, and connect the roll bending 15 of multi-wing centrifugal fan 11 tongue 16 and exhaust outlet 50, with the intake grill 20 being located at described lower snail coverboard 122 place, gap 40 is provided with between described intake grill 20 upper end and described flabellum 13.
Intake grill 20 extends out from the surface of the inner snail coverboard 122 downwards of hodmadod 12, outstanding wall 30 is formed on the back side of lower snail coverboard 122, on the concentric circle larger than the external diameter of described flabellum 13, described outstanding wall 30 comprises from described tongue 16 scope relative to the expansion section 155 with roll bending 15, and this outstanding wall 30 be the opposite direction of rotating along flabellum 13 from described tongue 16 in the annular wall of a part of scope breach, overall become C type.
Upper snail coverboard 121, the wind path formed between lower snail coverboard 122 and roll bending 15 in hodmadod 12, described upper snail coverboard 121 can be the plate body be wholely set with hodmadod 12, also can directly using the top panel of framework 10 as upper snail coverboard 121.
Again as shown in Figure 5, intake grill 20 extends to form the horn-like structure that internal diameter reduces gradually to the direction near described flabellum 13, the internal diameter D1 of described intake grill 20 upper end is less than the outer diameter D 2 of described flabellum 13.
The expansion section 155 of roll bending 15, it is the part that roll bending 15 expands along impeller outer perimembranous gradually to flabellum 13 sense of rotation wind path, although be form curved surface in Fig. 3 and Fig. 4 in the application, the words being formed Proximal surface shape by a plurality of plane combination are also fine.The straight portion 151 of following roll bending 15, refers to from expansion section 155 to exhaust outlet 50, slightly becomes the part of plane with the tangent direction of flabellum 13.
Separate between the lower end of flabellum 13 and intake grill 20, can guarantee that flabellum 13 can not touch and scrape intake grill 20 and normal rotation.Intake grill 20 extends out from the surface of the inner snail coverboard 122 downwards of hodmadod 12, that is, intake grill 20 extends to form the horn-like structure that internal diameter reduces gradually to the direction near flabellum 13, wind can enter flabellum 13 swimmingly along horn-like structure, and the internal diameter D1 of intake grill 20 upper end is arranged to the outer diameter D 2 being less than impeller, the wind flowing through intake grill 20 can smooth and easyly enter in flabellum 13, reduces sinuous flow, reduces noise.
Outstanding wall 30 extends to the position filling up gap 40 between intake grill 20 upper end and flabellum 13 on the axle direction of motor 14, even if be communicated with, the piping outside the house is longer or external wind pressure is larger, outstanding wall 30 also can stop the air of discharge, prevent the air inversion of discharging, reduce the pressure loss, improve air quantity, reduce noise.
And when connection the piping outside the house is shorter or external wind pressure is less, seldom there is adverse current in the air of discharging, and the wind that relative and not relative with the straight portion 151 of roll bending 15 with the expansion section 155 of roll bending 15 position of flabellum 13 blows out seldom collides roll bending 15, so the pressure loss is little, the adverse current produced in the gap 40 between flabellum 13 and intake grill 20 is less.Therefore, even if do not arrange outstanding wall 30 at flabellum 13 with the straight relative of roll bending 15 or near the position in the straight portion of roll bending 15 151, wind still can smooth and easyly flow out.
Now, if arrange outstanding wall 30 in the position that the straight portion 151 with roll bending 15 is relative, outstanding wall 30 becomes the obstruction that blocks air is discharged on the contrary, therefore, outstanding wall 30 is not exclusively closed, that is, outstanding wall 30 is not a complete annulus, but is provided with breach in the position that the straight portion 151 of roll bending 15 is relative.The stop of outstanding wall 30 can not be subject to when the wind flow that such flabellum 13 blows out is near exhaust outlet 50, exhaust outlet 50 can be flowed to swimmingly, thus reduce noise.
And because the wind path in hodmadod 12 expands gradually from tongue 16 along the sense of rotation of flabellum 13 to exhaust outlet 50 (distance namely flabellum 13 between thoughtful roll bending 15 expands gradually), so the wind blown out from flabellum 13, be that the crushing of boundary near exhaust outlet 50 side is minimum with tongue 16, the exhaust outlet 50 opposition side crushing of tongue 16 is maximum.
When connection the piping outside the house is shorter or external wind pressure is less, the resistance that the wind that flabellum 13 blows out is subject at exhaust outlet 50 place is very little, and in hodmadod 12, entirety can blow out wind swimmingly.When connection the piping outside the house is longer or external wind pressure is larger, the opposite direction of rotating from exhaust outlet 50 along flabellum 13 is the closer to tongue 16, the air flowed to inside flabellum 13 between flabellum 13 and lower snail coverboard 122 is more, and outstanding wall 30 just can prevent adverse current.But be that boundary arranges outstanding wall 30 in exhaust outlet 50 side of tongue 16 with tongue 16, will lose by build-up of pressure, air quantity reduces, and noise increases.
Therefore, from tongue 16 position in opposite directions the opposite direction of rotating along flabellum 13 make a part of scope breach, thus the wind making this part flow out can directly blow to exhaust outlet 30.
And ventilation fan 1 is the bathroom used time, the water droplet expectation being attached to flabellum 13 during exhaust can drop onto on the lower snail coverboard 122 inside outstanding wall 30, and by a part of breach of outstanding wall 30, water droplet can fly out and discharge to exhaust outlet 50 fast.
Again as shown in Figure 3, till outstanding wall 30 extends to the position of its tangent line 31 perpendicular to described exhaust outlet 50.Now, when overlooking exhaust outlet 50, the tangent line 31 of outstanding wall 30 separates roll bending side 152 and the lingual side 162 larger than roll bending side 152.
Described outstanding wall 30 extends to its tangent line 31 perpendicular to till described exhaust outlet 50, in detail, outstanding wall 30 forms the ring around flabellum 13, with or without several tangent lines on this ring, when the tangent line 31 of drawing from the some point of contacts on this ring is vertical with exhaust outlet 30, breach no longer extends.For convenience of statement, the present embodiment calls this point of contact " vertical point of contact 32 ".
Along the sense of rotation of flabellum 13 to the vertical point of contact 32 of outstanding wall 30 from tongue 16, because the spacing of flabellum 13 periphery and roll bending 15 is less, so the resistance that the wind that the flabellum 13 of this part blows out is subject to is larger, need that there is the smooth and easy exhaust outlet 50 that flows to of larger pressure ability, therefore, select to the vertical point of contact 32 of outstanding wall 30, to arrange outstanding wall 30 along the sense of rotation of flabellum 13 from tongue 16, thus increase blast, the wind that flabellum 13 is blown out smooth and easyly can blow to exhaust outlet 50.
And from tongue 16 along flabellum 13 rotate opposite direction to outstanding wall 30 vertical point of contact 32, because flabellum 13 is towards exhaust outlet 50, and road outside communication chamber is shorter or external wind pressure is less, the resistance that the wind of the impeller blowout of this part is subject to is very little, do not need that there is larger pressure and just smooth and easyly can flow to exhaust outlet 50, therefore, select to the vertical point of contact 32 of outstanding wall 30, to arrange breach along the opposite direction of wheel rotation from the position relative with tongue 16, do not carry out supercharging, the wind energy flowing to breach can be allowed on the contrary enough not by the stop of outstanding wall 30, flow out from breach to exhaust outlet 50 swimmingly, improve air quantity, reduce noise.
Outstanding wall of the present utility model can also have other to select, as shown in Figure 3, till outstanding wall 30 extends to the position of arbitrary between flabellum 13 sense of rotation 260-290 degree (A of angle shown in figure) from described tongue 16 corresponding position.Or it is crossing with described exhaust outlet 50 that outstanding wall 30 extends to its tangent line from tongue 16 corresponding position.Or when overlooking exhaust outlet 50, outstanding wall 30 extends to its tangent line 31 and separates roll bending side 152 and the lingual side 162 larger than roll bending side 152 from tongue 16 corresponding position.As long as directly blow in the scope of exhaust outlet 50 at the wind of flabellum blowout, not outstanding wall 30 stops the flowing of air, can improve air quantity thus, reduces noise.
Claims (6)
1. a ventilation fan, comprises framework and the multi-wing centrifugal fan being located at described lower portion,
Described multi-wing centrifugal fan is provided with hodmadod and is positioned at flabellum, the motor of hodmadod inside,
Described hodmadod comprises the upper snail coverboard that can be arranged in parallel up and down, lower snail coverboard, forms periphery wall on described and connect the roll bending of multi-wing centrifugal fan tongue and exhaust outlet and be located at the intake grill at described lower snail coverboard place between snail coverboard and lower snail coverboard, be provided with gap between described intake grill upper end and described flabellum, it is characterized in that:
Described intake grill extends out from the surface of the inner snail coverboard downwards of hodmadod, the back side of lower snail coverboard be provided with larger than the external diameter of described flabellum, be concentrically ringed outstanding wall with described flabellum, described outstanding wall comprises from described tongue to the scope relative with the expansion section of roll bending, and this outstanding wall be the opposite direction of rotating along flabellum from described tongue in the annular wall of a part of scope breach, this outstanding wall extends to the position filling up gap between described intake grill upper end and flabellum on the axle direction of described motor.
2. ventilation fan according to claim 1, is characterized in that: described intake grill extends to form the horn-like structure that internal diameter reduces gradually to the direction near described flabellum, the internal diameter D1 of described intake grill upper end is less than the outer diameter D 2 of described flabellum.
3. ventilation fan according to claim 1, is characterized in that: till described outstanding wall extends to position arbitrary between flabellum sense of rotation 260-290 degree from described tongue corresponding position.
4. ventilation fan according to claim 1, is characterized in that: it is crossing with described exhaust outlet that described outstanding wall extends to its tangent line.
5. ventilation fan according to claim 1, is characterized in that: when overlooking exhaust outlet, and described outstanding wall extends to its tangent line and separates roll bending side and the lingual side larger than roll bending side.
6. ventilation fan according to claim 1, is characterized in that: till described outstanding wall extends to the position of its tangent line perpendicular to described exhaust outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420847011.9U CN204402949U (en) | 2014-12-25 | 2014-12-25 | Ventilation fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420847011.9U CN204402949U (en) | 2014-12-25 | 2014-12-25 | Ventilation fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204402949U true CN204402949U (en) | 2015-06-17 |
Family
ID=53426814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420847011.9U Active CN204402949U (en) | 2014-12-25 | 2014-12-25 | Ventilation fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204402949U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610099A (en) * | 2017-02-16 | 2017-05-03 | 珠海格力电器股份有限公司 | Air supply device and air conditioner |
-
2014
- 2014-12-25 CN CN201420847011.9U patent/CN204402949U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610099A (en) * | 2017-02-16 | 2017-05-03 | 珠海格力电器股份有限公司 | Air supply device and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |