CN208619414U - A kind of pressurized centrifugan blower - Google Patents
A kind of pressurized centrifugan blower Download PDFInfo
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- CN208619414U CN208619414U CN201721921283.9U CN201721921283U CN208619414U CN 208619414 U CN208619414 U CN 208619414U CN 201721921283 U CN201721921283 U CN 201721921283U CN 208619414 U CN208619414 U CN 208619414U
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Abstract
The utility model discloses a kind of pressurized centrifugan blowers, including spiral case, the spiral case includes volute tongue and air outlet, the spiral case is internal, constitutes first area close to the side of volute tongue and separate air outlet, the spiral case is internal, second area is constituted at air outlet, it is characterised in that: further includes being connected to the first area with second area, enabling the air draught of second area to flow to first area and then promote the pipeline of wind pressure at first area.By the way that the pipeline for being connected to the two is arranged between area of low pressure and high-pressure area, pressure inside spiral case is recycled, pressure-air flows to area of low pressure, so that the pressure of the section start of centrifugal blower is increased, reduce the pressure difference of high-pressure area and area of low pressure, to improve the mechanical efficiency of centrifugal blower, so that the pressure rise at air outlet, promotes centrifugal blower performance and range hood smoke evacuation ability.
Description
Technical field
The utility model relates to blower, especially a kind of pressurized centrifugan blower.
Background technique
The centrifugal blower type applied in range hood at present is multiple wing leaf centrifugal blower, including by front shroud, rear cover
The spiral case that plate and the intermediate ring wall being connected between front shroud and back shroud are constituted is provided with impeller in spiral case, pacifies on back shroud
Equipped with for driving the motor of impeller, air inlet is formed on front shroud.
The working principle of this centrifugal blower is rotated by motor impeller 2 ', and the rotation of impeller 2 ' generates centrifugal force pair
Air work, gas carry out diffusion in spiral case 1 ', blower are finally discharged.Air flows in spiral case 1 ' along spiral case inlet pressure, by
In the acting of impeller 2 ', air pressure and flow streamwise are gradually increased, and (arrow show air stream as shown in Figure 4
To).
Due to the shape of spiral case, so that impeller is short to air working application time, does far from fan outlet side at volute tongue
Function is few, and pressure is lower；And at fan outlet, it since impeller is long to air working application time, does work more, pressure is high.While by
It is limited in noise, motor speed cannot be too high, and wind pressure hardly results in promotion at volute tongue, and entire fan outlet boost in pressure is caused to have
Limit, fan efficiency be not high.
Utility model content
Technical problem to be solved in the utility model is in view of the above-mentioned problems of the prior art, providing a kind of promotion
Export the pressurized centrifugan blower of wind pressure.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of pressurized centrifugan blower, including
Spiral case, the spiral case include volute tongue and air outlet, and the spiral case is internal, constitutes first close to the side of volute tongue and separate air outlet
Region, the spiral case is internal, second area is constituted at air outlet, it is characterised in that: further include by the first area and
Second area connection enables the air draught of second area to flow to first area and then promotes the pipe of wind pressure at first area
Road.
For the connection convenient for pipeline and two regions, on the wall surface of the spiral case, position corresponding with first area opened up
Have the first hole, on the wall surface of the spiral case, position corresponding with second area offer the second hole, the pipeline is connected to first
Between hole and the second hole.
Cause air-flow to interfere with each other to avoid too close apart from air outlet, increase noise, and can ensure that the first hole is located at
In first area, the spacing between first hole and volute tongue is 30~50mm.
Both to can ensure that flow that air draught flows between the two regions, to reach required reduction pressure difference
Effect, and interference impeller is avoided, the aperture in first hole and the second hole is respectively 10mm~50mm.
Preferably, the spiral case further includes cricoid intermediate ring wall, the front shroud on front side of intermediate ring wall and is located at
Back shroud on rear side of intermediate ring wall offers air inlet on the front shroud.
Preferably, first hole and the second hole are provided with any one in intermediate ring wall, front shroud or back shroud respectively
On a.
Compared with the prior art, the advantages of the utility model are: by being arranged between area of low pressure and high-pressure area
Make the pipeline of the two connection, the pressure inside spiral case is recycled, and pressure-air flows to area of low pressure, so that centrifugal blower
The pressure of section start be increased, the pressure difference of high-pressure area and area of low pressure is reduced, to improve centrifugal blower
Mechanical efficiency, so that the pressure rise at air outlet, promotes centrifugal blower performance and range hood smoke evacuation ability.
Detailed description of the invention
Fig. 1 is the schematic diagram of centrifugal blower one embodiment of the utility model；
Fig. 2 is the cross-sectional view of the centrifugal blower of Fig. 1；
Fig. 3 is the schematic diagram of second embodiment of centrifugal blower of the utility model；
Fig. 4 is the schematic diagram of the centrifugal blower of the prior art.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Embodiment one
Referring to Fig. 1 and Fig. 2, a kind of pressurized centrifugan blower, including spiral case 1 and the impeller 2 being arranged in spiral case 1.Spiral case 1
It is collectively constituted including cricoid intermediate ring wall 11, positioned at the cover board and volute tongue 14 of 11 two sides of ring wall, cover board and intermediate ring wall 11
Cavity in the above-mentioned impeller 2 of setting.In the present embodiment, cover board include positioned at 11 front side of intermediate ring wall front shroud 12 and
Positioned at the back shroud 12 of intermediate 11 rear side of ring wall.Herein, " preceding " refers to the side of spiral case air inlet, and " rear " refers to enters the wind far from spiral case
The side of mouth.Air inlet 15 is offered on front shroud 12, intermediate ring wall 11, front shroud 12 and back shroud 13 have collectively formed spiral case
1 air outlet 16.Above structure is the prior art, and details are not described herein again.
1 inside of spiral case is close to volute tongue 14 and the side far from air outlet 16 constitutes the first area Q1 (starting of centrifugal blower
Place, area of low pressure), 1 inside of spiral case constitutes second area Q2 (high-pressure area) at air outlet 16, the wind pressure of second area Q2
Higher than first area Q1.On the wall surface of spiral case 1, position corresponding with first area Q1 open up the first hole 17, the wall surface of spiral case 1
Upper, corresponding with second area Q2 position offers the second hole 18, and pipeline 19 is arranged between the first hole 17 and the second sky 18, by
First hole 17 is connected to by this with the second hole 18, that is to say, that by pipeline 19 by inside spiral case 1 first area Q1 and the secondth area
Domain Q2 connection.
By above structure, the pressure inside spiral case 1 is recycled, and the pressure-air of second area Q2 flows to first
Region Q1 reduces the pressure difference of high-pressure area and area of low pressure so that the pressure of the section start of centrifugal blower is increased, from
And the mechanical efficiency of centrifugal blower is improved, so that the pressure rise at air outlet 16, promotes centrifugal blower performance and suction
Kitchen ventilator smoke evacuation ability.
In the present embodiment, the first hole 17 and the second hole 18 are provided on intermediate ring wall 11.Preferably, the first hole 17 and snail
The spacing of tongue 14 is 30~50mm (horizontal distance), had thus both avoided too close apart from air outlet 16 and air-flow is caused mutually to be concerned with
It disturbs, increase noise, and can ensure that the first hole 17 is located in the Q1 of first area.The aperture in the first hole 17 and the second hole 18 is respectively
10mm~50mm, aperture is too small will to make the traffic flow of air draught between the two regions smaller, does not have and effectively follows
Ring pressurization effect, and aperture it is excessive, especially when the first hole 17 is located at aperture is excessive on front shroud 12 or back shroud 13 when,
It would be possible to that the air draught of second area Q2 is caused to be directly entered impeller 2 when flowing to first area Q1, interference impeller 2 is done
Function.
Embodiment two
Referring to Fig. 3, in the present embodiment, the difference with above-described embodiment one, the first hole 17 and the second hole 18 are opened up
On front shroud 12.
Alternatively, the first hole 17 and the second hole 18 can be provided with intermediate ring wall 11, front shroud 12 or back shroud respectively
In any one of 13, as long as respectively corresponding first area Q1 and second area Q2.
Claims (6)
1. a kind of pressurized centrifugan blower, including spiral case (1), the spiral case (1) includes volute tongue (14) and air outlet (16), described
Spiral case (1) is internal, constitutes first area (Q1) close to the side of volute tongue (14) and separate air outlet (16), in the spiral case (1)
Portion constitutes second area (Q2) at air outlet (16), it is characterised in that: further includes by the first area (Q1) and second
Region (Q2) connection enables the air draught of second area (Q2) to flow to first area (Q1) and then promotes first area (Q1)
Locate the pipeline (19) of wind pressure.
2. pressurized centrifugan blower according to claim 1, it is characterised in that: on the wall surface of the spiral case (1), with first
The corresponding position in region (Q1) offers the first hole (17), on the wall surface of the spiral case (1), position corresponding with second area (Q2)
It sets and offers the second hole (18), the pipeline (19) is connected between the first hole (17) and the second hole (18).
3. pressurized centrifugan blower according to claim 2, it is characterised in that: first hole (17) and volute tongue (14) it
Between spacing be 30~50mm.
4. pressurized centrifugan blower according to claim 2, it is characterised in that: first hole (17) and the second hole (18)
Aperture be respectively 10mm~50mm.
5. pressurized centrifugan blower according to claim 2, it is characterised in that: the spiral case (1) further includes in cricoid
Between ring wall (11), be located at intermediate ring wall (11) on front side of front shroud (12) and be located at intermediate ring wall (11) on rear side of back shroud
(13), air inlet (15) are offered on the front shroud (12).
6. pressurized centrifugan blower according to claim 5, it is characterised in that: first hole (17) and the second hole (18)
It is provided in any one in intermediate ring wall (11), front shroud (12) or back shroud (13) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721921283.9U CN208619414U (en) | 2017-12-29 | 2017-12-29 | A kind of pressurized centrifugan blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721921283.9U CN208619414U (en) | 2017-12-29 | 2017-12-29 | A kind of pressurized centrifugan blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208619414U true CN208619414U (en) | 2019-03-19 |
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ID=65690939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721921283.9U Active CN208619414U (en) | 2017-12-29 | 2017-12-29 | A kind of pressurized centrifugan blower |
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| CN (1) | CN208619414U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989942A (en) * | 2017-12-29 | 2019-07-09 | 宁波方太厨具有限公司 | A kind of pressurized centrifugan blower |
| CN111811117A (en) * | 2020-07-17 | 2020-10-23 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
-
2017
- 2017-12-29 CN CN201721921283.9U patent/CN208619414U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989942A (en) * | 2017-12-29 | 2019-07-09 | 宁波方太厨具有限公司 | A kind of pressurized centrifugan blower |
| CN109989942B (en) * | 2017-12-29 | 2024-01-16 | 宁波方太厨具有限公司 | Supercharged centrifugal fan |
| CN111811117A (en) * | 2020-07-17 | 2020-10-23 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
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