CN114922848A - Mixed flow fan and ducted air conditioner - Google Patents
Mixed flow fan and ducted air conditioner Download PDFInfo
- Publication number
- CN114922848A CN114922848A CN202210584074.9A CN202210584074A CN114922848A CN 114922848 A CN114922848 A CN 114922848A CN 202210584074 A CN202210584074 A CN 202210584074A CN 114922848 A CN114922848 A CN 114922848A
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- flow fan
- mixed flow
- air outlet
- volute
- line section
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- 238000004364 calculation method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000002441 reversible effect Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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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
- 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
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- 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 includes: 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 generatrix of the flow guiding cone comprises a straight line section and a curve section which are connected. According to the mixed flow fan and the air duct machine provided by the invention, the generatrix of the flow guiding cone is set into the straight line section and the curved line section, on the premise of ensuring the flow guiding effect, the curved line section is used for guiding the airflow generating the wall attachment effect, the phenomenon that the air outlet effect of the mixed flow fan is influenced by the vortex generated at the air outlet of the airflow is avoided, meanwhile, the straight line section and the inner shell are arranged in a tangent mode, the phenomenon that the airflow flowing is influenced by the step structure generated at the joint of the straight line section and the inner shell is avoided, and the air outlet effect of the mixed flow fan is further ensured.
Description
Technical Field
The invention relates to the technical field of air treatment equipment, in particular to a mixed flow fan and an air duct machine.
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 of the air outlet flows through the diversion cone; the generatrix of the guide cone comprises a straight line section and a curved line section which are connected.
The calculation formula of the generatrix of the flow guide cone is as follows:
wherein: t is an independent variable, the value range of t is (0,1), P0 is the bottom end point of the guide cone, P1 is the connection point of the straight line segment and the curve segment of the guide cone, P3 is the top end point of the guide cone, and P2 is the arc control point of the curve segment.
Along the direction of the rotation axis of the guide cone, the ratio range of the corresponding dimension H1 of the straight line section to the corresponding dimension H2 of the curved line section is 0 < H1/H2 < 1.
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, one end of the annular flow channel forms the air outlet, and the flow guide cone is arranged on the inner shell.
The diversion conical part corresponding to the straight line section is connected with the inner shell.
The straight line section and the part of the inner shell forming the air outlet are arranged in a tangent mode.
The mixed flow fan further comprises a guide vane, the guide vane is arranged in the annular flow channel, a first edge of the guide vane is fixedly arranged on the outer surface of the inner shell, and a second edge of the guide vane is fixedly arranged on the inner surface of the volute.
The outer surface of the volute is a curved surface.
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.
A tuber pipe machine, includes above-mentioned mixed flow fan.
According to the mixed flow fan and the air duct machine provided by the invention, the generatrix of the flow guiding cone is set into the straight line section and the curved line section, on the premise of ensuring the flow guiding effect, the curved line section is used for guiding the airflow generating the wall attachment effect, the phenomenon that the air outlet effect of the mixed flow fan is influenced by the vortex generated at the air outlet of the airflow is avoided, meanwhile, the straight line section and the inner shell are arranged in a tangent mode, the phenomenon that the airflow flowing is influenced by the step structure generated at the joint of the straight line section and the inner shell is avoided, and the air outlet effect of the mixed flow fan is further ensured.
Drawings
Fig. 1 is a schematic structural diagram of a mixed flow fan according to an embodiment of the present invention;
fig. 2 is a sectional view of a guide cone 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; 21. a straight line segment; 22. a curve segment; 3. an inner shell; 4. a guide vane.
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 do not limit the invention.
As shown in fig. 1 and 2, the present invention provides a spiral case 1, wherein an air outlet 12 is arranged on the spiral case 1; the diversion cone 2 is arranged at the air outlet 12, and the airflow at the air outlet 12 flows through the diversion cone 2; the generatrix of the guide cone 2 comprises a straight line section 21 and a curved line section 22 which are connected. The generatrix of the diversion cone 2 is set to be a straight line section 21 and a curve section 22, and on the premise of ensuring the diversion effect, the curve section 22 is utilized to guide the airflow generating the wall attachment effect, so that the influence of the airflow on the air outlet effect of the mixed flow fan due to the generation of vortex at the air outlet 12 is avoided.
The calculation formula of the generatrix of the guide cone 2 is as follows:
wherein: t is an independent variable, the value range of t is (0,1), P0 is the bottom end point of the guide cone 2, P1 is the connection point of the straight line segment 21 and the curved line segment 22 of the guide cone 2, P3 is the top end point of the guide cone 2, and P2 is the arc control point of the curved line segment 22.
Along the rotation axis direction of the guide cone 2, the ratio range of the corresponding dimension H1 of the straight line segment 21 to the corresponding dimension H2 of the curved line segment 22 is 0 < H1/H2 < 1. That is, the ratio of the height dimension H1 of straight section 21 to the height dimension H2 of curved section 22 ranges from 0 < H1/H2 < 1. When the ratio is 0, it does not have straightway 21 to explain the generating line of water conservancy diversion awl 2 this moment promptly, only the arc line section, because do not have the transition of straightway 21 for can't form smooth transition between inner shell and the water conservancy diversion awl 2, thereby influence the air-out effect of mixed flow fan, simultaneously can't play effectual water conservancy diversion effect in air outlet 12 department, can make 2 rear gathering eddies of water conservancy diversion awl, be unfavorable for mixed flow fan to take the promotion of pressure ability and the maintenance of mixed flow fan efficiency. And when the ratio is 1, the height of the diversion cone 2 is too big this moment to diversion cone 2 can produce the point portion, and this point portion can surpass the radius of rotation of fan, when mixed flow fan rotation comes the switching air-out direction, can take place to interfere with the casing, and the diversion cone 2 of great size can influence the flow of giving vent to anger of mixed flow fan, makes the fan take the pressure ability to descend, efficiency decline.
A simulation test is carried out on the mixed flow fan of the embodiment, the numerical value of H1/H2 is changed, and the simulation result is as follows:
according to simulation data, when the H1/H2 is 0.4, the air quantity and the calculated pressure head basically reach the maximum value, the calculated efficiency of the mixed flow fan is also basically maximum at the moment, when the H1/H2 is increased to 0.8, the air quantity and the calculated pressure head both start to be reduced, the calculated efficiency also starts to be reduced at the moment, when the H1/H2 is continuously increased to 1, the air quantity and the calculated pressure head are further reduced, the calculated efficiency is further reduced, when the H1/H2 is continuously increased to 1.3, namely, the proportion of a straight line segment 21 is large, the air flow is difficult to generate a flow guiding effect, and the air quantity and the pressure capacity are obviously reduced; when H1H 2 reduces to 0, the amount of wind, calculate pressure head and calculation efficiency though reach the maximum value, nevertheless because do not have the transition of straightway 21 for can't form smooth transition between inner shell 3 and the water conservancy diversion awl 2, thereby influence the air-out effect of mixed flow fan, can't play effectual water conservancy diversion effect in air outlet 12 department simultaneously, can make 2 rear gathering eddies of water conservancy diversion awl, be unfavorable for mixed flow fan to take the promotion of pressure ability and the maintenance of mixed flow fan efficiency.
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 guide cone 2 is arranged on the inner shell 3. Utilize inner shell 3 to install the impeller of mixed flow fan and driving motor thereof, 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 same department after discharging, thereby guarantee the air-out effect of mixed flow fan, set up water conservancy diversion awl 2 on inner shell 3 simultaneously, can utilize water conservancy diversion awl 2 further water conservancy diversion to the air current in the annular flow channel, avoid multi-directional air current to assemble the back and produce the condition such as vortex, guarantee the air-out effect of mixed flow fan.
The part of the guide cone 2 corresponding to the straight line segment 21 is connected with the inner shell 3. That is, the air flow of the air outlet 12 flows through the straight line segment 21 and the curved line segment 22 in sequence, so that the curved line segment 22 is fully utilized to guide the air flow generating the wall attachment effect, and the air flow is prevented from generating a vortex at the air outlet 12 to influence the air outlet effect of the mixed flow fan.
The straight line segment 21 is tangential to the portion of the inner shell 3 forming the air outlet 12. The influence on the flow of air flow caused by the step structure generated at the joint of the straight line section 21 and the inner shell 3 is avoided, and the air outlet effect of the mixed flow fan is further ensured.
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. And the guide vane 4 is used for further guiding the airflow in the annular flow passage, so that the air outlet effect of the mixed flow fan is ensured.
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 section 22.
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 use the centre of sphere of ball platform structure to carry out the free rotation in the fixed spherical space of a diameter as the center, when being applied to tuber pipe machine and tuber pipe machine demand when being air outlet from top to bottom, can provide the fixed spherical space of a 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) are ensured by arranging the air ports on the end surfaces, and the potential safety hazard caused by exposure of the internal structure of the volute 1 due to the holes on the curved surface part of the volute 1 can be avoided.
A tuber pipe machine, includes above-mentioned 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 various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
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 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 generatrix of the diversion cone (2) comprises a straight line section (21) and a curved line section (22) which are connected.
2. The mixed flow fan of claim 1, wherein: the calculation formula of the bus of the flow guide cone (2) is as follows:
wherein: t is an independent variable, the value range of t is (0,1), P0 is the bottom end point of the guide cone (2), P1 is the connection point of the straight line segment (21) and the curve segment (22) of the guide cone (2), P3 is the top end point of the guide cone (2), and P2 is the arc control point of the curve segment (22).
3. The mixed flow fan of claim 1, wherein: along the direction of the rotation axis of the guide cone (2), the ratio range of the corresponding dimension H1 of the straight line section (21) to the corresponding dimension H2 of the curved line section (22) is 0 < H1/H2 < 1.
4. 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, an annular flow channel is formed between the inner shell (3) and the volute, 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).
5. The mixed flow fan of claim 4, wherein: the part of the diversion cone (2) corresponding to the straight line section (21) is connected with the inner shell (3).
6. The mixed flow fan of claim 5, wherein: the straight line section (21) and the part of the inner shell (3) forming the air outlet (12) are arranged in a tangent mode.
7. The mixed flow fan of claim 4, 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).
8. The mixed flow fan of claim 1, wherein: the outer surface of the volute (1) is a curved surface.
9. 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.
10. The mixed flow fan of claim 9, 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).
11. A ducted air conditioner characterized in that: a mixed flow fan comprising any of claims 1 to 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210584074.9A CN114922848A (en) | 2022-05-27 | 2022-05-27 | Mixed flow fan and ducted air conditioner |
| PCT/CN2022/140285 WO2023226393A1 (en) | 2022-05-27 | 2022-12-20 | Mixed flow fan and duct type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210584074.9A CN114922848A (en) | 2022-05-27 | 2022-05-27 | Mixed flow fan and ducted air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114922848A true CN114922848A (en) | 2022-08-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210584074.9A Pending CN114922848A (en) | 2022-05-27 | 2022-05-27 | Mixed flow fan and ducted air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114922848A (en) |
| WO (1) | WO2023226393A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226393A1 (en) * | 2022-05-27 | 2023-11-30 | 珠海格力电器股份有限公司 | Mixed flow fan and duct type air conditioner |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0988897A (en) * | 1995-09-20 | 1997-03-31 | Hitachi Ltd | Mixed flow blower and manufacture of noise absorbing material for mixed flow blower |
| CN112082185A (en) * | 2019-06-14 | 2020-12-15 | 青岛海尔智能技术研发有限公司 | Air inlet device and refrigerating smoke machine |
| CN210509665U (en) * | 2019-08-30 | 2020-05-12 | 山东天瑞重工有限公司 | Fan water conservancy diversion awl structure |
| CN110762622B (en) * | 2019-11-08 | 2024-07-02 | 珠海格力电器股份有限公司 | Air conditioner |
| CN211600830U (en) * | 2020-01-02 | 2020-09-29 | 杭州老板电器股份有限公司 | Mixed flow fan and range hood |
| CN111156197A (en) * | 2020-01-20 | 2020-05-15 | 珠海格力电器股份有限公司 | Air outlet flow guide cover, mixed flow fan assembly and air conditioning equipment |
| CN211977025U (en) * | 2020-04-30 | 2020-11-20 | 广东美的制冷设备有限公司 | Indoor unit of air conditioner |
| CN217558625U (en) * | 2022-05-27 | 2022-10-11 | 珠海格力电器股份有限公司 | Mixed flow fan and air duct machine |
| CN114922848A (en) * | 2022-05-27 | 2022-08-19 | 珠海格力电器股份有限公司 | Mixed flow fan and ducted air conditioner |
-
2022
- 2022-05-27 CN CN202210584074.9A patent/CN114922848A/en active Pending
- 2022-12-20 WO PCT/CN2022/140285 patent/WO2023226393A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226393A1 (en) * | 2022-05-27 | 2023-11-30 | 珠海格力电器股份有限公司 | Mixed flow fan and duct type air conditioner |
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| Publication number | Publication date |
|---|---|
| WO2023226393A1 (en) | 2023-11-30 |
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