CN217582586U - Mixed flow fan and ducted air conditioner - Google Patents
Mixed flow fan and ducted air conditioner Download PDFInfo
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- CN217582586U CN217582586U CN202221287476.4U CN202221287476U CN217582586U CN 217582586 U CN217582586 U CN 217582586U CN 202221287476 U CN202221287476 U CN 202221287476U CN 217582586 U CN217582586 U CN 217582586U
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Abstract
The utility model provides a mixed flow fan and tuber pipe machine. 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 of the air outlet flows through the diversion cone; a first silencing cavity is formed in the flow guide cone, at least one first silencing hole is formed in the flow guide cone, and the first silencing hole is communicated with the first silencing cavity. The utility model provides a mixed flow fan and tuber pipe machine, through form the amortization chamber on the water conservancy diversion awl, and set up first amortization hole, make the air current that flows through the water conservancy diversion awl can cooperate the purpose of realizing that the amortization is fallen and make an uproar with first amortization chamber jointly under the effect of first amortization hole, thereby reduce the noise of mixed flow fan, set up second amortization chamber and second amortization hole simultaneously on the inner shell, increase the scope of making an uproar, the further noise that reduces the mixed flow fan.
Description
Technical Field
The utility model relates to an air treatment facility technical field, especially a mixed flow fan and tuber pipe 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, the fan needs to be reduced, the mixed flow fan is a fan between the axial flow fan and the centrifugal fan, an impeller of the mixed flow fan enables air to do centrifugal motion and axial motion, and the air flow motion in the volute mixes 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 airflow.
The mixed flow fan can produce noise in the working process, especially when the air current flows out of the air outlet of the mixed flow fan, the mixed flow fan in the prior art is not provided with a noise reduction structure to reduce the noise, and only the guide cone is arranged to only play a role in guiding the air outlet of the mixed flow fan, so that the mixed flow fan still has the problem of overlarge noise.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an in provide a mixed flow fan and tuber pipe machine to solve the problem that mixed flow fan efficiency is low among the prior art.
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 flow guide cone is internally provided with a first silencing cavity, at least one first silencing hole is formed in the flow guide cone, and the first silencing hole is communicated with the first silencing cavity.
The ratio of the diameter D of the first muffling hole to the radius R of the bottom surface of the flow guide cone ranges from 0.03 to 0.12.
The ratio of the distance H between every two adjacent first silencing holes to the diameter D of each first silencing hole ranges from 1.3 to 4.4.
The distance H between every two adjacent first silencing holes is larger than the diameter D of each first silencing hole.
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.
A second silencing cavity is formed in the inner shell, and the first silencing cavity is communicated with the second silencing cavity.
And a second silencing hole communicated with the second silencing cavity is formed in the inner shell.
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.
The utility model provides a mixed flow fan and tuber pipe machine, through forming the amortization chamber on the water conservancy diversion awl, and set up first amortization hole, make the air current of flowing through the water conservancy diversion awl can realize the purpose of making an uproar and making an uproar with the cooperation of first amortization chamber jointly under the effect of first amortization hole, thereby reduce the noise of mixed flow fan, set up second amortization chamber and second amortization hole simultaneously on the inner shell, increase the scope of making an uproar, further reduce the noise of mixed flow fan.
Drawings
Fig. 1 is a schematic structural view of a mixed flow fan according to an embodiment of the present invention;
fig. 2 is a perspective view of a guide cone according to an embodiment of the present invention;
fig. 3 is a top view of a guide cone according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an inner shell and a guide vane according to an embodiment of the present invention;
fig. 5 is a perspective view of an inner casing and a guide vane according to an embodiment of the present invention;
in the figure:
1. a volute; 12. an air outlet; 2. a flow guide cone; 21. a first muffling chamber; 22. a first muffling hole; 3. an inner shell; 31. a second muffling chamber; 32. a second muffling hole; 33. and (6) guide vanes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1 to 5, the utility model provides a mixed flow fan, which comprises a volute 1, wherein an air outlet 12 is arranged on the volute 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; a first silencing cavity 21 is formed inside the flow guiding cone 2, at least one first silencing hole 22 is formed in the flow guiding cone 2, and the first silencing hole 22 is communicated with the first silencing cavity 21. Through forming the noise reduction cavity on the flow guide cone 2 and arranging the first noise reduction hole 22, the air current flowing through the flow guide cone 2 can be matched with the first noise reduction cavity 21 under the action of the first noise reduction hole 22 to achieve the purposes of noise reduction and noise reduction.
The ratio of the diameter D of the first muffling hole 22 to the bottom radius R of the guide cone 2 ranges from 0.03 to 0.12. Wherein, the bottom surface of the diversion cone 2 is the end surface of the diversion cone 2 connected with the volute 1.
The mixed flow fan of the embodiment is subjected to simulation test, the numerical value of D/R is changed, and the simulation result is as follows:
from the simulation result, when the D/R is 0.06, the air volume and the calculated pressure head do not reach the maximum value at the moment, but the noise at the moment is at the minimum value, when the D/R is increased to 0.12, the air volume and the pressure head start to be reduced, the noise is increased on the contrary, when the D/R is continuously increased to 0.15, the air volume and the calculated pressure head continue to be reduced, the noise reduction effect cannot be achieved, when the D/R is reduced to 0.03, the air volume and the calculated pressure head start to be increased, the noise also starts to be increased, and when the D/R is continuously reduced to 0.01, the air volume and the calculated pressure head can reach the maximum value, but the noise at the moment is overlarge; when the D/R value is smaller, the diameter of the opening is smaller, the surface of the flow guide cone is smooth, the air volume loss is smaller, the silencing effect of the first silencing hole is limited, and the overall noise of the mixed flow fan is larger. When the D/R value is bigger than normal, the diameter of the opening is bigger than normal, the surface of the diversion cone is rough, the air quantity loss is bigger than normal, the silencing effect of the silencing hole is hard to embody, and the integral noise of the unit is bigger than normal. When the D/R value is within the optimal value (0.03-0.12), the air column can vibrate at a moderate frequency, the surface smoothness of the guide cone is moderate, the air volume loss is small, and the purpose of low noise is achieved.
The ratio of the distance H between every two adjacent first silencing holes to the diameter D of each first silencing hole ranges from 1.3 to 4.4. When the curved surface exists on the flow guide cone, the distance H refers to the distance between the projections of the two adjacent first silencing holes on the installation plane of the flow guide cone.
The mixed flow fan of the embodiment is subjected to simulation test, the numerical value of H/D is changed, and the simulation result is as follows:
from the simulation result, when the H/D is 3, the air volume and the calculated pressure head do not reach the maximum value at the moment, but the noise at the moment is at the minimum value, when the H/D is reduced to 1.3, the air volume and the pressure head start to be reduced, the noise is increased on the contrary, when the H/D is continuously reduced to 1.2, the air volume and the calculated pressure head continue to be reduced, the noise is continuously increased, the noise reduction effect cannot be achieved, when the H/D is increased to 4.4, the air volume and the calculated pressure head start to be increased, the noise also starts to be increased, and when the H/D is continuously increased to 5.0, the air volume and the calculated pressure head can reach the maximum value, but the noise at the moment is also overlarge; that is, when the value of H/D is larger, the number of the holes is smaller (sparse), the surface of the guide cone is smoother, the air volume is larger, but the noise reduction level is limited. When the value of H/D is on the small side, the number of openings is more (dense) this moment, the surface of the diversion cone is rough, the air quantity is on the small side, the rough surface can cause the vicinity of the diversion cone to generate unstable turbulent flow, and the noise reduction effect can be influenced. When the H/D value is in a proper stage (1.3-4.4), the smoothness of the surface of the guide cone can be ensured, and the noise reduction effect can be ensured.
The distance H between every two adjacent first silencing holes is larger than the diameter D of each first silencing hole.
Preferably, the distance H between two adjacent first muffling holes 22 ranges from 3mm to 10mm. The diameter D of the first muffling hole 22 ranges from 1mm to 4mm.
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.
A second muffling cavity 31 is formed in the inner shell 3, and the first muffling cavity 21 is communicated with the second muffling cavity 31. The space of the first silencing cavity 21 is increased by arranging the second silencing cavity 31, so that the silencing capacity of the first silencing cavity 21 is increased, and the noise of the mixed flow fan is effectively reduced.
The inner shell 3 is provided with a second silencing hole 32 communicated with the second silencing cavity 31, the second silencing hole 32 is used for silencing air flow in the annular flow channel, noise in a first frequency range is reduced, and the second silencing hole and the air flow flowing through the flow guide cone 2 are silenced by the first silencing hole 22, so that the frequency range of silencing is increased under the common cooperation of noise reduction of the noise in a second frequency range, and further the noise of the mixed flow fan is further reduced.
The guide vane 33 is arranged in the annular flow passage, and the guide vane 33 can guide the air flow (the air outlet of the impeller) in the annular flow passage, so that the air outlet effect of the mixed flow fan is improved.
The diameter d of the second muffling hole 32 is 0.05 to 0.2 times the height h of the guide vane 33. The height H of the guide vane 33 refers to the size of the guide vane in the axial direction of the impeller 2, the guide vane 33 can be determined according to the size of the inner shell 4, and under the condition that the volume of the second muffling chamber 31 is guaranteed to be unchanged, the higher the height of the inner shell 3 is, the larger the height H of the guide vane 33 is, the smaller the maximum diameter of the inner shell 3 is, the smaller the resistance of the air channel in the volute 1 to the air flow is, and conversely, the smaller the height of the inner shell 3 is, the smaller the height H of the guide vane 33 is, the larger the maximum diameter of the inner shell 3 is, and the larger the resistance of the air channel in the volute 1 to the air flow is.
The mixed flow fan of the present example is subjected to a simulation test, and the simulation result is as follows by changing the range of D/H under the condition of keeping the diameter D of the first muffling hole and the distance H between the first muffling holes unchanged:
from the above results, when d/h is 0.12, the air volume reaches the maximum value, the internal power and the noise reach the minimum value, when d/h is increased to 0.20, the air volume begins to decrease, the internal power and the noise begin to increase, when d/h is continuously increased to 0.22, the air volume continues to decrease, the internal power and the noise continue to increase, that is, the continuous increase of d/h is not beneficial to the air volume and the noise of the mixed flow fan; when the d/h is reduced to 0.05, the air volume begins to be reduced, the internal power and the noise begin to be increased, when the d/h continues to be reduced to 0.01, the air volume continues to be reduced, the internal power and the noise still increase, namely when the value of the d/h is larger, the noise reduction effect on the mixed flow fan is not good, and the smooth degree of an air duct in the volute 1 is influenced when the diameter of the second silencing hole 32 is too large or the height of the guide vane 33 is smaller, the flow of air is not facilitated, and the extra noise is caused on the contrary, but when the diameter of the second silencing hole 32 is too small, the second silencing hole 32 cannot generate the noise reduction effect on the air flow, so that the noise reduction effect of the mixed flow fan can be better realized by selecting a proper value of the d/h.
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 and an air outlet 12 at two end surfaces of the table structure.
An air duct machine comprises the mixed flow fan.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention 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 diversion cone (2) is arranged at the air outlet (12), and the airflow of the air outlet (12) flows through the diversion cone (2);
a first silencing cavity (21) is formed inside the diversion cone (2), at least one first silencing hole (22) is formed in the diversion cone (2), and the first silencing hole (22) is communicated with the first silencing cavity (21).
2. The mixed flow fan of claim 1, wherein: the ratio of the diameter D of the first silencing hole (22) to the radius R of the bottom surface of the flow guide cone ranges from 0.03 to 0.12.
3. The mixed flow fan of claim 1, wherein: the ratio of the distance H between every two adjacent first silencing holes (22) to the diameter D of the first silencing holes (22) ranges from 1.3 to 4.4.
4. The mixed flow fan of claim 1, wherein: the distance H between every two adjacent first silencing holes (22) is larger than the diameter D of the first silencing holes (22).
5. 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 diversion cone (2) is arranged on the inner shell (3).
6. The mixed flow fan of claim 5, wherein: a second silencing cavity (31) is formed in the inner shell (3), and the first silencing cavity (21) is communicated with the second silencing cavity (31).
7. The mixed flow fan of claim 6, wherein: and a second silencing hole (32) communicated with the second silencing cavity (31) is formed in the inner shell (3).
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 and an air outlet (12).
10. A ducted air conditioner characterized in that: comprising the mixed flow fan of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221287476.4U CN217582586U (en) | 2022-05-27 | 2022-05-27 | Mixed flow fan and ducted air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221287476.4U CN217582586U (en) | 2022-05-27 | 2022-05-27 | Mixed flow fan and ducted air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN217582586U true CN217582586U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221287476.4U Active CN217582586U (en) | 2022-05-27 | 2022-05-27 | Mixed flow fan and ducted air conditioner |
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| CN (1) | CN217582586U (en) |
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2022
- 2022-05-27 CN CN202221287476.4U patent/CN217582586U/en active Active
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