CN106523434A - Centrifugal fan volute and indoor machine - Google Patents
Centrifugal fan volute and indoor machine Download PDFInfo
- Publication number
- CN106523434A CN106523434A CN201611036320.8A CN201611036320A CN106523434A CN 106523434 A CN106523434 A CN 106523434A CN 201611036320 A CN201611036320 A CN 201611036320A CN 106523434 A CN106523434 A CN 106523434A
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- CN
- China
- Prior art keywords
- spiral case
- air outlet
- heat exchanger
- centrifugal fan
- constant
- 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.)
- Granted
Links
- 241000237858 Gastropoda Species 0.000 claims description 18
- 238000009434 installation Methods 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000010992 reflux Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a centrifugal fan volute. The centrifugal fan volute is arranged in a shell of an indoor machine; an air inlet and an air outlet are formed in the shell; a heat exchanger is arranged in the shell and between the volute and the air outlet; an air outlet extending structure is arranged at the air outlet position of the volute; and the air outlet extending structure is positioned on an extended line of a volute shaped line. According to the centrifugal fan volute and the indoor machine, provided by the invention, reflux area is small, fan efficiency is high and noise is low; and the fact that wind can blow to an effective area of the heat exchanger accurately is guaranteed, dispersion of the wind is reduced and the heat exchange efficiency of the heat exchanger is improved.
Description
Technical field
The invention belongs to spiral case technical field, specifically, is to be related to a kind of centrifugal fan spiral case and using the snail
The indoor set of shell design.
Background technology
The design of traditional centrifugal fan spiral case, distinguished and admirable from spiral case air outlet blowout dissipate larger, cause to be blown to heat exchanger
Air quantity reduce, reduce the heat exchange efficiency of heat exchanger.
The content of the invention
The invention provides a kind of centrifugal fan spiral case, reduces the wandering of wind.
In order to solve above-mentioned technical problem, the present invention is employed the following technical solutions and is achieved：
A kind of centrifugal fan spiral case, in indoor unit casing, is provided with air inlet and air outlet on the housing,
Heat exchanger is provided with housing, between spiral case and air outlet, at the spiral case air outlet is provided with air outlet extended structure,
The air outlet extended structure is located on the extended line of spiral case inlet pressure.
Further, length of the air outlet extended structure on snail tongue molded line extended lineWherein, a
For constant, W is heat exchanger width, and θ is the angle of heat exchanger and housing bottom surface.
Further, the snail tongue radius of the spiral case is r=bRsin θ, and wherein, b is constant, and R is centrifugal fan half
Footpath, θ are the angle of heat exchanger and housing bottom surface.
Further, the wind tongue room of the spiral case is δ t=cRcos θ, and wherein, c is constant, and R is centrifugal fan half
Footpath, θ are the angle of heat exchanger and housing bottom surface.
Further, the end of the air outlet extended structure has installation portion, is fixed by the installation portion and housing
Connection.
Further, air outlet extended structure projection in the horizontal plane and heat exchanger projection in the horizontal plane
The distance between be more than or equal to 0.
Preferably, the span of constant a is 0.5～0.7.
Preferably, the span of constant b is 0.2～0.25.
Preferably, the span of constant c is 0.2～0.25.
The invention allows for a kind of indoor set, including the centrifugal fan spiral case, spiral case is arranged in indoor unit casing,
Air inlet and air outlet is provided with the housing, is provided with heat exchanger, described in housing, between spiral case and air outlet
Air outlet extended structure is provided with spiral case air outlet, and the air outlet extended structure is located on the extended line of spiral case inlet pressure.
Compared with prior art, advantages of the present invention and good effect are：The centrifugal fan spiral case and indoor set of the present invention,
Backflow area is little, and fan efficiency is high, and noise is little；Ensure that wind is accurately blown to heat exchanger effective coverage, reduce the wandering of wind, improve
The heat exchange efficiency of heat exchanger.
After the detailed description of embodiment of the present invention is read in conjunction with the accompanying, the other features and advantages of the invention will become more
Plus it is clear.
Description of the drawings
Fig. 1 is the structural representation of indoor set proposed by the invention；
Fig. 2 is the structural representation of spiral case in Fig. 1；
Fig. 3 is the structural representation of air outlet extended structure in Fig. 2；
Fig. 4 is the comparison diagram of the spiral case in Fig. 2 and prior art spiral case；
Fig. 5 is the magnified partial view of Fig. 4；
Fig. 6 is the air quantity noise graph of a relation of spiral case in Fig. 2.
Reference：
1st, housing；1-1, air inlet；1-2, air outlet；2nd, dividing plate；3rd, spiral case；3-1, snail tongue；
4th, centrifugal fan；5th, heat exchanger；6th, air outlet extended structure；6-1, installation portion；V, volute space.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in more detail.
The indoor set of the present embodiment mainly includes housing 1, and housing 1 includes upper shell and lower house, is provided with housing 1
Air inlet 1-1 and air outlet 1-2, is provided with centrifugal blower and heat exchanger 5 in housing 1, and centrifugal blower is laid near air intake
Mouth 1-1 sides, heat exchanger 5 are laid near air outlet 1-2 sides, and centrifugal blower includes centrifugal fan 4 and spiral case 3, referring to Fig. 1
It is shown.
For the ease of the fixation of spiral case 3, dividing plate 2 is provided with housing 1, dividing plate 2 is located between spiral case 3 and heat exchanger 5,
Spiral case 3 is fixed on dividing plate 2 by the installing plate of its air outlet.
Existing spiral case inner space is less, in order to reduce spiral case inside and outside differential pressure, lengthens air inducing length, in spiral case air outlet
Place is provided with air outlet extended structure 6, and air outlet extended structure 6 is on the extended line of spiral case inlet pressure P, it is ensured that wind is accurately blown to
Heat exchanger effective coverage, reduces the wandering of wind, increases air quantity, improve the heat exchange efficiency of heat exchanger, it is ensured that heat exchanger
Exchange capability of heat, referring to shown in Fig. 2, Fig. 3.
Air outlet extended structure 6 is docked with spiral case air outlet, and the wind in volute space V passes through spiral case air outlet, air outlet
Extended structure 6 blows out.
The end of air outlet extended structure 6 has installation portion 6-1, and installation portion 6-1 is fixed on dividing plate 2, so as to realize
Air outlet extended structure 6 is fixedly connected with housing 1.
In the present embodiment, length of the air outlet extended structure 6 on snail tongue molded line P-1 extended lines
Wherein, a is constant, and W is heat exchanger width, and θ is the angle (θ can be described as heat exchanger angle of inclination) of heat exchanger and housing bottom surface.
The value of length L of air outlet extended structure has considered the shadow of heat exchanger width W and heat exchanger tilt angle theta
Ring, the air outlet extended structure thus designed reduces spiral case inside and outside differential pressure, increases air inducing length so that wind accurately blows
To heat exchanger effective coverage, the heat exchange efficiency of heat exchanger is improve.
In the present embodiment, the span of constant a is 0.5～0.7.The air-out designed using the constant a of the scope
Mouth extended structure, air output is big, heat exchanger heat exchange efficiency is high.
The projection in the horizontal plane of air outlet extended structure 6 is big with the distance between the projection in the horizontal plane of heat exchanger 5
In equal to 0, it is to avoid the middle and lower part for only blowing to heat exchanger of the blowout of air outlet extended structure 6, thus caused heat exchange is avoided then
The heat exchange efficiency of device is reduced.
In the present embodiment, near lower house, spiral case 3 has snail tongue 3-1 to the air outlet of spiral case 3, and snail tongue radius is r=
BRsin θ, wherein, b is constant, and R is centrifugal fan radius, and θ is heat exchanger and (θ can be described as heat exchanger and incline the angle of housing bottom surface
Rake angle).
The value of snail tongue radius r considers the impact of fan radius R and heat exchanger tilt angle theta, realizes spiral case in drop
Under the premise of low air quantity return loss, noise is reduced.
In the present embodiment, the span of constant b is 0.2～0.25.Using the constant b of the scope, and combine fan
The snail tongue radius r that radius R and heat exchanger tilt angle theta are designed, heat exchanger heat exchange effect caused by both having avoided snail tongue radius excessive
Rate is low, and caused by avoiding snail tongue radius too small again, the wind part of spiral case air outlet blowout blows to upper shell, and then avoids thus making
Into reduction air quantity, increase noise, occur turbulent flow the problems such as；Both reduction air quantity return loss is realized, is further reduced
Noise.
In the present embodiment, the design of snail tongue radius r so that the bound of the wind of spiral case air outlet blowout is just and heat exchanger
Top and bottom coincide so that the heat exchange efficiency of heat exchanger reaches maximum.
Gap between 4 fan blade of snail tongue 3-1 and centrifugal fan, referred to as the wind tongue room of spiral case, wind tongue room is too small to be made
Into backflow, backflow not only causes fan efficiency to decline, or an important noise source, therefore selects suitable wind tongue room pair
Overall performance affects very big.
Therefore, in order to avoid causing fan efficiency to decline, and noise is further reduced, the wind tongue room δ t=of spiral case
CRcos θ, wherein, c is constant, and R is centrifugal fan radius, and θ is the angle of heat exchanger and housing bottom surface.
In the present embodiment, the span of constant c is 0.2～0.25.Using the constant c of the scope, and combine fan
The wind tongue room that radius R and heat exchanger tilt angle theta are designed, backflow area are little, and fan efficiency is high, and noise is little.
The spiral case of the present embodiment, considers the radius R of centrifugal fan, length L of air outlet extended structure, snail tongue radius
R, volute space V, heat exchanger angle of inclination are θ, and the major parameter such as heat exchanger width W improves existing spiral case line style.
Below, referring to shown in Fig. 4, Fig. 5, the spiral case of spiral case of the prior art and the present embodiment is contrasted.Side
Case one is spiral case of the prior art, and spiral case inlet pressure is P1, and snail tongue radius is r1, and wind tongue room is δ t1, and flow back area A1 (Fig. 5
Shown in middle left diagonal line hatches area)；Spiral case of the scheme two for the present embodiment, spiral case inlet pressure are P2, and snail tongue radius is r2, between wind tongue
Gap is δ t2, and flow back area A2 (in Fig. 5 shown in right diagonal line hatches area)；As can be seen from Figure 5, A2 is less than A1, the present embodiment
Spiral case backflow area is little, improves fan efficiency.
Test on same indoor set, in the case of equal air quantity, the spiral case of the present embodiment is than in prior art
Spiral case lower noise 4dB, it is shown in Figure 6.
The spiral case of the present embodiment, under the premise of air quantity return loss is reduced, reduces noise；Backflow area is little, fan efficiency
Height, noise are little；Ensure that wind is accurately blown to heat exchanger effective coverage, reduce the wandering of wind, improve the heat exchange efficiency of heat exchanger.Base
In the indoor set of above-mentioned Volute Design, noise is little, heat exchanger heat exchange efficiency high, and experience is good, and competitiveness is strong.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
Change, remodeling, addition or replacement that the those of ordinary skill in domain is made in the essential scope of the present invention, should also belong to this
Bright protection domain.
Claims (10)
1. a kind of centrifugal fan spiral case, in indoor unit casing, is provided with air inlet and air outlet on the housing,
Heat exchanger is provided with housing, between spiral case and air outlet, it is characterised in that：Air outlet is provided with the spiral case air outlet
Extended structure, the air outlet extended structure are located on the extended line of spiral case inlet pressure.
2. spiral case according to claim 1, it is characterised in that：The air outlet extended structure is on snail tongue molded line extended line
LengthWherein, a is constant, and W is heat exchanger width, and θ is the angle of heat exchanger and housing bottom surface.
3. spiral case according to claim 1, it is characterised in that：The snail tongue radius of the spiral case is r=bRsin θ, wherein, b
For constant, R is centrifugal fan radius, and θ is the angle of heat exchanger and housing bottom surface.
4. spiral case according to claim 1, it is characterised in that：The wind tongue room of the spiral case is δ t=cRcos θ, wherein,
C is constant, and R is centrifugal fan radius, and θ is the angle of heat exchanger and housing bottom surface.
5. spiral case according to claim 2, it is characterised in that：The end of the air outlet extended structure has installation portion,
It is fixedly connected with the casing by the installation portion.
6. spiral case according to claim 2, it is characterised in that：Air outlet extended structure projection in the horizontal plane with
The distance between heat exchanger projection in the horizontal plane is more than or equal to 0.
7. spiral case according to claim 2, it is characterised in that：The span of constant a is 0.5～0.7.
8. spiral case according to claim 3, it is characterised in that：The span of constant b is 0.2～0.25.
9. spiral case according to claim 4, it is characterised in that：The span of constant c is 0.2～0.25.
10. a kind of indoor set, it is characterised in that：Including spiral case as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611036320.8A CN106523434B (en) | 2016-11-23 | 2016-11-23 | Centrifugal fan volute and indoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611036320.8A CN106523434B (en) | 2016-11-23 | 2016-11-23 | Centrifugal fan volute and indoor unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106523434A true CN106523434A (en) | 2017-03-22 |
| CN106523434B CN106523434B (en) | 2020-02-28 |
Family
ID=58356136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611036320.8A Active CN106523434B (en) | 2016-11-23 | 2016-11-23 | Centrifugal fan volute and indoor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106523434B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592201A (en) * | 2018-05-10 | 2018-09-28 | 青岛海尔空调电子有限公司 | A kind of Novel spider plant falls machine |
| EP4012274A4 (en) * | 2019-10-30 | 2022-09-28 | GD Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner indoor unit and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2179924Y (en) * | 1993-12-29 | 1994-10-19 | 广州市环境卫生研究所 | Low-noise centrifugal fan |
| CN102538078A (en) * | 2012-02-29 | 2012-07-04 | 青岛海尔空调电子有限公司 | Air pipe machine indoor machine |
| CN203374522U (en) * | 2013-06-03 | 2014-01-01 | 青岛海尔空调电子有限公司 | Volute and air hose unit |
| CN104566636A (en) * | 2013-10-28 | 2015-04-29 | 珠海格力电器股份有限公司 | Air duct machine and air conditioner with same |
| CN204532964U (en) * | 2015-03-26 | 2015-08-05 | 广东美的暖通设备有限公司 | The spiral case of centrifugal blower, centrifugal blower and air conditioner |
| CN106050700A (en) * | 2016-07-19 | 2016-10-26 | 东莞市宏铭通风设备有限公司 | Noiseless fan structure |
-
2016
- 2016-11-23 CN CN201611036320.8A patent/CN106523434B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2179924Y (en) * | 1993-12-29 | 1994-10-19 | 广州市环境卫生研究所 | Low-noise centrifugal fan |
| CN102538078A (en) * | 2012-02-29 | 2012-07-04 | 青岛海尔空调电子有限公司 | Air pipe machine indoor machine |
| CN203374522U (en) * | 2013-06-03 | 2014-01-01 | 青岛海尔空调电子有限公司 | Volute and air hose unit |
| CN104566636A (en) * | 2013-10-28 | 2015-04-29 | 珠海格力电器股份有限公司 | Air duct machine and air conditioner with same |
| CN204532964U (en) * | 2015-03-26 | 2015-08-05 | 广东美的暖通设备有限公司 | The spiral case of centrifugal blower, centrifugal blower and air conditioner |
| CN106050700A (en) * | 2016-07-19 | 2016-10-26 | 东莞市宏铭通风设备有限公司 | Noiseless fan structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592201A (en) * | 2018-05-10 | 2018-09-28 | 青岛海尔空调电子有限公司 | A kind of Novel spider plant falls machine |
| EP4012274A4 (en) * | 2019-10-30 | 2022-09-28 | GD Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner indoor unit and air conditioner |
| US11808464B2 (en) | 2019-10-30 | 2023-11-07 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner indoor unit and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106523434B (en) | 2020-02-28 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20201113 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. |
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| TR01 | Transfer of patent right |