CN114922849A - Mixed flow fan and air duct machine - Google Patents
Mixed flow fan and air duct machine Download PDFInfo
- Publication number
- CN114922849A CN114922849A CN202210584104.6A CN202210584104A CN114922849A CN 114922849 A CN114922849 A CN 114922849A CN 202210584104 A CN202210584104 A CN 202210584104A CN 114922849 A CN114922849 A CN 114922849A
- Authority
- CN
- China
- Prior art keywords
- flow fan
- mixed flow
- air outlet
- volute
- cone
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
-
- 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
- F04D29/26—Rotors specially for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a mixed flow fan and a duct type air conditioner. The mixed flow fan comprises a volute, and an air outlet is formed in the volute; the diversion cone is arranged at the air outlet, and the airflow of the air outlet flows through the diversion cone; the connecting line of the two ends of the generatrix of the guide cone and the rotation axis of the guide cone form an included angle c, and the included angle c ranges from 45 degrees to 75 degrees. According to the mixed flow fan and the air duct machine provided by the invention, the angle of the included angle c is limited, so that the flow guide cone can effectively guide the air outlet of the volute, the vortex generated at the air outlet of the volute by the airflow is reduced as much as possible, the under-pressure capacity of the mixed flow fan is ensured, the performance of the mixed flow fan is ensured, meanwhile, the rotation eliminating and pressurizing effects of the rotation eliminating section can be fully exerted by the ratio of the bottom radius of the flow guide cone to the radius of the air outlet, and the under-pressure capacity and the self efficiency of the mixed flow fan are further improved.
Description
Technical Field
The invention relates to the technical field of air treatment equipment, in particular to a mixed flow fan and a duct type air conditioner.
Background
The air duct machine is one of air conditioners, in order to improve the comfortableness, some air duct machines adopt an upper cold air outlet mode and a lower hot air outlet mode, waterfall type refrigeration and carpet type warm air can be realized, in order to realize the air outlet mode, the air outlet of the air duct machine is required to be reversible, in the existing air outlet reversible air duct machine, a cross-flow fan and a centrifugal fan are generally adopted, but the fan is not reversible due to the problem of the setting mode of fan blades, the air direction after the reversal is not reversible, therefore, at least two fans can be arranged, one fan is responsible for forward air outlet, and the other fan is responsible for reverse air outlet, so that the structure of the air duct machine is larger, and the cost is higher.
In order to reduce the cost, a fan needs to be reduced, a mixed flow fan is a fan between an axial flow fan and a centrifugal fan, an impeller of the mixed flow fan enables air to do both centrifugal motion and axial motion, and the motion of air flow in the volute is mixed with two motion modes of axial flow and centrifugal motion, so that the mixed flow fan is called mixed flow. Moreover, the mixed flow fan not only can reduce the volume, but also can ensure the flow direction and the wind pressure of the airflow.
The flow guide cone of the mixed flow fan in the prior art is unreasonable in design, so that the mixed flow fan is low in energy efficiency.
Disclosure of Invention
The embodiment of the invention provides a mixed flow fan and an air duct machine, and aims to solve the problem that the mixed flow fan in the prior art is low in energy efficiency.
A mixed flow fan, comprising:
the volute is provided with an air outlet;
the diversion cone is arranged at the air outlet, and the airflow at the air outlet flows through the diversion cone;
the connecting line of the two ends of the generatrix of the guide cone and the rotation axis of the guide cone form an included angle c, and the included angle c ranges from 45 degrees to 75 degrees.
The mixed flow fan further comprises an inner shell, the inner shell is arranged in the volute, an annular flow channel is formed between the inner shell and the volute, the air outlet is formed in one end of the annular flow channel, and the flow guide cone is arranged on the inner shell.
The inner shell is provided with an end face at the air outlet, the diversion cone is arranged on the end face, and the projection of the diversion cone on the end face is superposed with the end face.
The mixed flow fan further comprises a guide vane, the guide vane is arranged in the annular flow channel, the first edge of the guide vane is fixedly arranged on the outer surface of the inner shell, and the second edge of the guide vane is fixedly arranged on the inner surface of the volute.
The mixed flow fan further comprises an impeller, the impeller is arranged in the volute and located on one side, away from the air outlet, of the impeller, and the rotation axis of the flow guide cone is collinear with the axis of the impeller.
The ratio range of the radius R2 of the bottom of the flow guide cone to the radius R of the air outlet is 0.3-0.7.
And the diversion cone and the inner shell are in smooth transition.
The volute is of a ball table structure, and the maximum diameter of the volute is equal to the diameter of the ball table structure.
The volute is positioned on two end faces of the table structure and is respectively provided with an air inlet and an air outlet.
An air duct machine comprises the mixed flow fan.
According to the mixed flow fan and the air duct machine provided by the invention, the angle of the included angle c is limited, so that the flow guide cone can effectively guide the air outlet of the volute, the vortex generated at the air outlet of the volute by the airflow is reduced as much as possible, the under-pressure capacity of the mixed flow fan is ensured, the performance of the mixed flow fan is ensured, meanwhile, the rotation eliminating and pressurizing effects of the rotation eliminating section can be fully exerted by the ratio of the bottom radius of the flow guide cone to the radius of the air outlet, and the under-pressure capacity and the self efficiency of the mixed flow fan are further improved.
Drawings
FIG. 1 is a cross-sectional view of a mixed flow fan according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a mixed flow fan according to an embodiment of the present invention;
in the figure:
1. a volute; 11. an air inlet; 12. an air outlet; 2. a flow guide cone; 3. an inner shell; 4. a guide vane; 5. an impeller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A mixed flow fan as shown in fig. 1 and 2, comprising: the air conditioner comprises a volute 1, wherein an air outlet 12 is formed in the volute 1; the diversion cone 2 is arranged at the air outlet 12, and the airflow of the air outlet 12 flows through the diversion cone 2; the connecting line of the two ends of the bus of the guide cone 2 and the rotation axis of the guide cone 2 form an included angle c, the included angle c is in the range of 45-75 degrees, the angle of the included angle c is limited, so that the guide cone 2 can effectively guide the air outlet of the volute 1, the air flow is reduced as far as possible to generate vortex at the air outlet 12 of the volute 1, the pressure capacity of the mixed flow fan is guaranteed, and the performance of the mixed flow fan is guaranteed.
The diversion cone 2 is a revolving body structure formed by rotating a generatrix of the diversion cone 2 for 360 degrees along a revolving axis.
The mixed flow fan of the embodiment is subjected to simulation test, the numerical value of the included angle c is changed, and the simulation result is as follows:
according to simulation data, when the angle of the included angle c is 60 degrees, the air volume and the calculated pressure head both reach the maximum value, the calculation efficiency of the mixed flow fan reaches the maximum value at the moment, when the included angle c is increased to 75 degrees, the air volume and the calculated pressure head both begin to decrease, the calculation efficiency also begins to decrease at the moment, when the included angle c continues to increase to 80 degrees, the air volume and the calculated pressure head further decrease, namely, because the height of the guide cone 2 is lower, an effective flow guide effect cannot be achieved at the air outlet 12, vortex is gathered behind the guide cone 2, and the improvement of the pressure bearing capacity of the mixed flow fan and the maintenance of the efficiency of the mixed flow fan are not facilitated; when the included angle c is reduced to 45 degrees, the air quantity and the calculation pressure head are reduced, and the calculation efficiency is reduced; when the included angle c continues to be reduced to 40 degrees, the air quantity and the calculation pressure head are further reduced, namely the height of the guide cone 2 is higher, the overall size of the mixed flow fan can be influenced, the tip of the guide cone 2 can exceed the rotating radius of the fan, when the mixed flow fan rotates to switch the air outlet direction, the guide cone 2 with larger size can interfere with the shell, the air outlet flow of the mixed flow fan can be influenced, the pressure bearing capacity of the fan is reduced, and the efficiency is reduced. That is, only when the included angle c is in the range of 45 degrees to 75 degrees, the guide cone 2 can inhibit the generation of the vortex amount behind the guide cone 2 through the guide profile of the guide cone 2, and the performance of the fan is improved.
The mixed flow fan further comprises an inner shell 3, the inner shell 3 is arranged in the volute 1, an annular flow channel is formed between the inner shell 3 and the volute 1, the air outlet 12 is formed in one end of the annular flow channel, and the guide cone 2 is arranged on the inner shell 3. Utilize inner shell 3 to install mixed flow fan's impeller and driving motor, utilize annular flow channel to carry out the water conservancy diversion of certain degree to impeller combustion air simultaneously, make the air current of air outlet 12 department can assemble to same department after discharging, thereby guarantee mixed flow fan's air-out effect, set up water conservancy diversion awl 2 on inner shell 3 simultaneously, can utilize water conservancy diversion awl 2 further water conservancy diversion of air current in to annular flow channel, avoid producing the condition such as vortex after multi-direction air current assembles, guarantee mixed flow fan's air-out effect.
The inner shell 3 is formed with the terminal surface in air outlet 12 department, the water conservancy diversion awl 2 set up in on the terminal surface, and the projection of water conservancy diversion awl 2 on the terminal surface with the terminal surface coincidence. Avoid producing the stair structure and causing the turbulent flow in the junction of water conservancy diversion awl 2 and inner shell 3, guarantee mixed flow fan's air-out effect.
Preferably, the guide cone 2 and the inner shell 3 have smooth transition.
The mixed flow fan further comprises a guide vane 4, the guide vane 4 is arranged in the annular flow channel, the first edge of the guide vane 4 is fixedly arranged on the outer surface of the inner shell 3, and the second edge of the guide vane 4 is fixedly arranged on the inner surface of the volute 1. And the guide vane 4 is used for further guiding the airflow in the annular flow channel, so that the air outlet effect of the mixed flow fan is ensured.
The mixed flow fan further comprises an impeller 5, the impeller 5 is arranged in the volute 1 and is located on one side, away from the air outlet 12, of the impeller 5, and the rotation axis of the diversion cone 2 is collinear with the axis of the impeller 5. The air outlet of the impeller 5 is prevented from deviating to one side of the flow guiding cone 2, so that the air flow speed and the air flow quantity on one side of the flow guiding cone 2 are too large, the air flow speed and the air flow quantity on the other side are too small, the flow guiding of the flow guiding cone 2 is influenced reliably, and the air outlet effect of the mixed flow fan is ensured.
The ratio of the bottom radius R2 of the diversion cone 2 to the radius R of the air outlet 12 ranges from 0.3 to 0.7. Wherein, the bottom of the guide cone 2 is a matching plane between the guide cone 2 and the inner shell 3.
The simulation test is carried out on the mixed flow fan, the numerical value of R2/R is changed, and the simulation result is as follows:
according to simulation data, when R2/R is 0.52, the air volume and the calculated pressure head both reach the maximum value, and the calculation efficiency of the mixed flow fan reaches the maximum value, when R2/R is increased to 0.7, the air volume and the calculated pressure head both start to be reduced, and the calculation efficiency also starts to be reduced, when R2/R is continuously increased to 0.72, the air volume and the calculated pressure head are further reduced, namely the size of the guide cone 2 is larger, and the area of the fan outlet is reduced, so that the flow resistance in the fan is increased, the air volume is seriously attenuated, and the improvement of the fan performance is not facilitated; when R2/R is reduced to 0.3, the air quantity and the calculation pressure head also start to be reduced, and the calculation efficiency at the moment also starts to be reduced; when R2/R continues to reduce to 0.27, the amount of wind further reduces with the calculation pressure head, and the guide cone 2 size is just small promptly, because the relation of R1+ R2 this moment, can make the trailing edge size R1 of stator 4 increase to and the area increase of fan export, the aforesaid change can influence the area of taking pressure ability of fan, is unfavorable for the promotion of fan performance. That is, only when R2/R is in the range of 0.3 to 0.7, the guide cone 2 can fully exert the despinning supercharging effect of the despin section (the area between the impeller 5 and the guide vane 4) through the self guide line, thereby improving the pressure bearing capacity and the self efficiency of the fan.
The outer surface of the volute 1 is a curved surface. I.e. the cross-section of the outer surface of the volute 1 is a curved segment.
The volute 1 is of a ball table structure, and the maximum diameter of the volute 1 is equal to the diameter of the ball table structure. That is, spiral case 1 can carry out the free rotation in the fixed spherical space of diameter with the centre of sphere of ball platform structure as the center, when being applied to tuber pipe machine and tuber pipe machine demand when going out wind from top to bottom, can provide the fixed spherical space of diameter for the mixed flow fan that this application provided in the tuber pipe machine, realizes the switching of tuber pipe machine business turn over wind direction through the rotation of mixed flow fan.
The volute 1 is provided with an air inlet 11 and an air outlet 12 at two end surfaces of the table structure. The sizes of the air ports (the air inlet 11 and the air outlet 12) can be ensured by arranging the air ports at the end faces, and the potential safety hazard caused by exposure of the internal structure of the volute 1 due to hole opening at the curved surface part of the volute 1 can be avoided.
An air duct machine comprises the mixed flow fan.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. The utility model provides a mixed flow fan which characterized in that: the method comprises the following steps:
the air conditioner comprises a volute (1), wherein an air outlet (12) is formed in the volute (1);
the flow guide cone (2) is arranged at the air outlet (12), and the airflow of the air outlet (12) flows through the flow guide cone (2);
the connecting line of the two ends of the bus of the diversion cone (2) and the rotation axis of the diversion cone (2) form an included angle c, and the included angle c is in the range of 45-75 degrees.
2. The mixed flow fan of claim 1, wherein: the mixed flow fan further comprises an inner shell (3), the inner shell (3) is arranged in the volute (1), an annular flow channel is formed between the inner shell (3) and the volute (1), one end of the annular flow channel forms the air outlet (12), and the flow guide cone (2) is arranged on the inner shell (3).
3. The mixed flow fan of claim 2, wherein: the inner shell (3) is provided with an end face at the air outlet (12), the diversion cone (2) is arranged on the end face, and the projection of the diversion cone (2) on the end face is superposed with the end face.
4. The mixed flow fan of claim 2, wherein: the mixed flow fan further comprises a guide vane (4), the guide vane (4) is arranged in the annular flow channel, a first edge of the guide vane (4) is fixedly arranged on the outer surface of the inner shell (3), and a second edge of the guide vane (4) is fixedly arranged on the inner surface of the volute (1).
5. The mixed flow fan of claim 1, wherein: the mixed flow fan further comprises an impeller (5), the impeller (5) is arranged in the volute (1), the diversion cone (2) is located on one side, away from the air outlet (12), of the impeller (3), and the rotation axis of the diversion cone (2) is collinear with the axis of the impeller (5).
6. The mixed flow fan of claim 1, wherein: the ratio of the bottom radius R2 of the diversion cone (2) to the radius R of the air outlet (12) is 0.3-0.7.
7. The mixed flow fan of claim 2, wherein: the diversion cone (2) and the inner shell (3) are in smooth transition.
8. The mixed flow fan of claim 1, wherein: the volute (1) is of a ball table structure, and the maximum diameter of the volute (1) is equal to the diameter of the ball table structure.
9. The mixed flow fan of claim 8, wherein: the volute (1) is positioned on two end faces of the table structure and is respectively provided with an air inlet (11) and an air outlet (12).
10. A ducted air conditioner characterized in that: comprising a mixed flow fan according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210584104.6A CN114922849A (en) | 2022-05-27 | 2022-05-27 | Mixed flow fan and air duct machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210584104.6A CN114922849A (en) | 2022-05-27 | 2022-05-27 | Mixed flow fan and air duct machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114922849A true CN114922849A (en) | 2022-08-19 |
Family
ID=82809852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210584104.6A Pending CN114922849A (en) | 2022-05-27 | 2022-05-27 | Mixed flow fan and air duct machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114922849A (en) |
-
2022
- 2022-05-27 CN CN202210584104.6A patent/CN114922849A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2023226366A1 (en) | Mixed-flow fan and air-duct type air conditioner | |
| CN114922852A (en) | Mixed flow fan and ducted air conditioner | |
| CN217558625U (en) | Mixed flow fan and air duct machine | |
| CN114922848A (en) | Mixed flow fan and ducted air conditioner | |
| CN217582590U (en) | Mixed flow fan and air duct machine | |
| CN217421627U (en) | Mixed flow fan and ducted air conditioner | |
| CN217421632U (en) | Mixed flow fan and ducted air conditioner | |
| CN217950771U (en) | Mixed flow fan and ducted air conditioner | |
| WO2023226398A1 (en) | Mixed flow fan and air duct-type air conditioner | |
| WO2023226365A1 (en) | Mixed flow fan and air duct-type air conditioner | |
| WO2023226379A1 (en) | Mixed flow fan and ducted air conditioner | |
| CN209925295U (en) | Fin-shaped bionic noise-reduction centrifugal fan | |
| CN217421631U (en) | Mixed flow fan and ducted air conditioner | |
| CN114922849A (en) | Mixed flow fan and air duct machine | |
| CN114909329A (en) | Mixed flow fan and ducted air conditioner | |
| CN114909331A (en) | Mixed flow fan assembly and air duct machine | |
| CN114893443A (en) | Mixed flow fan and ducted air conditioner | |
| CN217421625U (en) | Mixed flow fan and ducted air conditioner | |
| CN217761449U (en) | Mixed flow fan and ducted air conditioner | |
| CN217421628U (en) | Mixed flow fan and ducted air conditioner | |
| CN217421624U (en) | Mixed flow fan and ducted air conditioner | |
| CN217582588U (en) | Mixed flow fan and air duct machine | |
| CN217421629U (en) | Mixed flow fan and ducted air conditioner | |
| CN217582574U (en) | Impeller, mixed flow fan and ducted air conditioner | |
| CN217421633U (en) | Current collector, mixed flow fan and air duct machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |