CN210977969U - Impeller and fan for ventilation treatment equipment and ventilation treatment equipment - Google Patents
Impeller and fan for ventilation treatment equipment and ventilation treatment equipment Download PDFInfo
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- CN210977969U CN210977969U CN201921831673.6U CN201921831673U CN210977969U CN 210977969 U CN210977969 U CN 210977969U CN 201921831673 U CN201921831673 U CN 201921831673U CN 210977969 U CN210977969 U CN 210977969U
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- impeller
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- blades
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- 238000009423 ventilation Methods 0.000 title claims description 15
- 238000002560 therapeutic procedure Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 10
- 229920000742 Cotton Polymers 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000002640 oxygen therapy Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
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Abstract
The utility model relates to a treatment facility field of ventilating discloses an impeller, fan and treatment facility of ventilating for ventilating treatment facility. The impeller comprises a wheel disc and a plurality of blades, the blades are arranged on the surface of one side of the wheel disc and are arranged at intervals along the circumferential direction of the wheel disc, a main flow channel for medium flowing is formed between every two adjacent blades, a plurality of through holes corresponding to the main flow channel are formed in the wheel disc, the blades are arranged to extend towards the edge of the wheel disc from the center of the wheel disc and end at the inner side of the edge, and the through holes are located at the tail end of each blade and between the edges in the radial direction of the wheel disc. The impeller of the utility model, on one hand, can reduce the strength of the falling noise of the impeller vortex by making the interval between the tail end of the blade and the edge of the wheel disc; on the other hand, the through hole is formed in the wheel disc, so that low-frequency noise can be greatly reduced. Will the utility model discloses a when the impeller was applied to the fan, the noise reduction effect of fan can effectively be promoted.
Description
Technical Field
The utility model relates to a treatment equipment field of ventilating specifically relates to an impeller for treatment equipment of ventilating, including the fan of this impeller and including the treatment equipment of ventilating of this fan.
Background
The core component of the ventilation treatment equipment is a small fan which is also a source of noise generated by the ventilation treatment equipment, and the blade structure of the fan plays a crucial role in the noise. Specifically, during the use of the fan, the fan converts other forms of energy into mechanical energy for the rotation of the impeller, and the rotating impeller can transfer the energy to the continuously flowing gas so as to realize gas transportation and energy transfer. However, the application of the fan is greatly restricted due to the high-speed pneumatic noise caused by the high-speed rotation of the impeller. Therefore, it is very important to reduce and control the noise of the fan.
At present, noise reduction for fans is based on improvements of volutes, for example, by changing different volute intervals near the volute tongue, so that the airflow reduces the resonance caused by vortex and airflow impact at different places as much as possible. However, the noise reduction effect of the mode is not obvious, and the mode only has obvious effect on a specific impeller, so that the universality is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, provide an impeller, including the fan of this impeller and including the treatment of ventilating equipment of this fan for ventilating treatment equipment to promote the noise reduction effect of fan through the structure of improving the impeller.
In order to achieve the above object, the present invention provides an impeller for a ventilation therapy device in a first aspect, the impeller includes a wheel disc and a plurality of blades, the plurality of blades set up in on a side surface of the wheel disc and along the circumference interval arrangement of wheel disc, adjacent two form the sprue that supplies the medium to flow between the blades, be provided with on the wheel disc with a plurality of through-holes that the sprue corresponds, the blade sets up to follow the center orientation of wheel disc the edge of wheel disc extends and ends in the inboard at edge, the through-hole is in the footpath of wheel disc is radially located the end of blade with between the edge.
Optionally, a splitter blade extending in the same direction as the corresponding blade is arranged in each main flow channel, the length of the splitter blade is smaller than that of the blade, and the tail end of the splitter blade is flush with the tail end of the blade, so as to divide the outlet of the main flow channel into two sub-flow channels.
Optionally, the splitter blade is located on a center line of the main runner, each main runner corresponds to one of the through holes, and a center of the through hole is located on an extension line of the splitter blade.
Optionally, the through hole is a circular hole, and the diameter of the through hole is 20% -60% of the width of the outlet of the sub-runner; or
The through-hole is a strip-shaped hole, and the length of the through-hole is equal to the width of the outlet of the sub-runner.
Optionally, the splitter blade is located on a center line of the main runner, each main runner corresponds to two of the through holes, and centers of the two through holes are located on center lines of the two sub runners, respectively.
Optionally, the through hole is a circular hole, and the diameter of the through hole is 25% -65% of the width of the outlet of the sub-runner; or
The through holes are strip-shaped holes, and the length of the through holes is smaller than the outlet width of the sub-runners.
Optionally, the blades are twisted counterclockwise radially outward of the disk.
Optionally, the impeller includes a hub, and the hub is disposed at the center of the wheel disc and is used for connecting a rotating shaft of the motor.
A second aspect of the present invention provides a blower for ventilation therapy equipment, the blower includes a housing, a motor and an impeller, the impeller is installed in the housing with the motor, the motor is connected with the impeller to drive the impeller to rotate.
The third aspect of the present invention provides a ventilation treatment device, which comprises the blower described above.
The impeller of the utility model, on one hand, the effective radius of the wheel disc is reduced by the interval between the tail end of the blade and the edge of the wheel disc, and the air velocity in the impeller flow channel can be reduced, thereby reducing the intensity of the falling noise of the impeller vortex; on the other hand through set up the through-hole on the rim plate, the through-hole can be broken up into little whirlpool or eliminate with the big whirlpool that the sprue exit formed, because big whirlpool is the source of low frequency noise, consequently can reduce low frequency noise by a wide margin. Will the utility model discloses a when the impeller was applied to the fan, the noise reduction effect of fan can effectively be promoted.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a perspective view of a first embodiment of an impeller in the present invention;
FIG. 2 is a perspective view of a second embodiment of the impeller of the present invention;
FIG. 3 is a perspective view of a third embodiment of the impeller of the present invention;
fig. 4 is a perspective view of a fourth embodiment of the impeller of the present invention.
Description of the reference numerals
1-wheel disc, 2-blade, 3-splitter blade, 4-main runner, 5-sub runner, 6-through hole, 7-hub.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
The utility model discloses an aspect provides an impeller for ventilating treatment equipment, the impeller includes rim plate 1 and a plurality of blade 2, and a plurality of blade 2 set up on one side surface of rim plate 1 and arrange along the circumference interval of rim plate 1, form between two adjacent blades 2 and supply the sprue 3 that the medium flows, are provided with a plurality of through-holes 6 that correspond with a plurality of sprue 3 on the rim plate 1, and blade 2 sets up to extend and terminate in from the center of rim plate 1 towards the edge of rim plate 1 the inboard at edge, through-hole 6 in the radial terminal that lies in blade 2 of rim plate 1 with between the edge.
It should be noted that the above-mentioned wheel disc 1 is provided with a plurality of through holes 6 corresponding to the plurality of main flow channels 3, which means that the through holes 6 are located between two adjacent blades 2 in the circumferential direction of the wheel disc 1, and each main flow channel 3 may correspond to one or more through holes 6. The blades 2 described above are arranged to extend from the centre of the disc 1 towards the edge of the disc 1 and to terminate inside said edge, meaning that there is a space between the tip of the blade 2 and the edge of the disc 1. Wherein, the size of the interval between the tail end of the blade 2 and the edge of the wheel disc 1 can be adaptively adjusted according to the shape and the size of the through hole 6.
Through research, the centrifugal impeller trailing edge Noise is roughly divided into two types, namely turbulent boundary layer-trailing edge Noise (TB L-TE Noise) and laminar boundary layer-vortex shedding Noise (L BS-VS Noise), wherein the centrifugal impeller takes the vortex shedding Noise as the main Noise source of the rotation of the impeller, and the vortex shedding Noise intensity F of the centrifugal impelleriThe estimation formula of (c) is:
Fi＝Sr*u*i/L
wherein S isrThe number is Strouhal number (Strouhal number) and represents the ratio of unsteady motion inertia force and inertia force, u is w r, u is the air flow speed in the impeller flow passage, w is the linear speed of the impeller, r is the effective radius of the wheel disc (namely the radius from the center of the wheel disc to the tail end of the blade), i is the harmonic serial number, and L is the orthographic area of the blade.
The impeller of the utility model reduces the effective radius of the wheel disc 1 by arranging a space between the tail end of the blade 2 and the edge of the wheel disc 1, and can reduce the air velocity in the impeller flow passage, thereby reducing the intensity of the shedding noise of the impeller vortex; in addition, because in the impeller course of work, the air current can form big whirlpool in the exit of sprue 3, the utility model discloses a set up on rim plate 1 interval and through-hole 6, the spaced existence can make the drop point of big whirlpool remove to the outside of rim plate 1, and the existence of through-hole 6 can make big whirlpool move to the low pressure face (being the one side that is equipped with blade 2 of rim plate 1) from the high-pressure face near through-hole 6 of sprue 3 exit (being the one side that does not establish blade 2 of rim plate 1) to being broken up into little snail or eliminating, because big whirlpool is the source of low frequency noise, consequently can reduce low frequency noise by a wide margin. Will the utility model discloses a when the fan was applied to the impeller, can effectively promote the noise reduction effect of fan, moreover because the noise reduction of fan comes from the improvement to the impeller structure, therefore the commonality is higher.
The utility model discloses in, too big in order to prevent the vortex that 3 exits of sprue formed, can set up in every sprue 3 with the splitter blade 4 of the blade 2 that corresponds (being used for injecing corresponding sprue 3's blade 2) syntropy extension, splitter blade 4's length is less than blade 2's length to splitter blade 4's end flushes with blade 2's end, separates the exit of sprue 3 (being sprue 3's the one end that is close to the rim plate edge) for two subchannels 5.
In order to equalize the air flow rates of the two sub-runners 5, reduce the pneumatic impact on the blades, and prevent the impeller from being unstable, it is preferable that the splitter blade 4 be located on the center line of the main runner 3, that is, the splitter blade 4 equally divides the outlet of the main runner 3 into the two sub-runners 5.
The utility model discloses in, to the setting of through-hole 6, according to the utility model discloses an embodiment, as shown in fig. 2 and fig. 4, every sprue 3 can correspond a through-hole 6, and this kind of mode can reduce the quantity of punching of rim plate 1, improves rim plate intensity, simplifies the preparation technology. In this case, it may be preferable to locate the center of the through hole 6 on the extension line of the splitter blade 4 so that both the large vortices in the two sub runners 5 can be broken up into small vortices or eliminated by the through hole 6. Wherein the through hole 6 may be of any shape. For example, as shown in fig. 2, the through-holes 6 may be circular holes, and the diameter of the through-holes 6 may be 20% to 60%, preferably 50%, of the width of the outlet of the runner 5. For example, the outlet width of the sub-runners 5 is 4mm and the diameter of the through-holes 6 is 2 mm. Through setting up through-hole 6 into the circular port, can reduce the effective area that punches, reduce the destruction degree to 1 intensity of rim plate, and then reduce the requirement of using the material to 1 rim plate. As shown in fig. 4, for example, the through-holes 6 may be strip-shaped holes, in which case, it may be preferable to make the length of the through-holes 6 equal to the outlet width of the sub-runners 5 to further improve the noise reduction effect. Through setting up through-hole 6 into the bar hole, can also make the processing technology of small-size impeller simple.
According to another embodiment of the present invention, as shown in fig. 1 and 3, each main runner 3 can correspond to two through holes 6, so that the gas coming out from each branch runner 5 has a separation point moving backwards, which can improve the noise reduction effect. In this case, it may be preferable to locate the centers of the two through holes 6 on the center lines of the two sub-runners 5, respectively, to further improve the noise reduction effect. Wherein the through hole 6 may be of any shape. For example, as shown in fig. 1, the through-holes 6 may be circular holes, in which case it may be preferable to make the diameter of the through-holes 6 to be 25% -65% of the outlet width of the sub-runners 5. As further example shown in fig. 3, the through-holes 6 may be strip-shaped holes, in which case it may be preferable to make the length of the through-holes 6 smaller than the outlet width of the sub-runners 5. Compared with a circular hole, the area of the hole is increased by the strip-shaped hole, so that a horizontal area formed by the separation points is not an independent area formed by independent sub-runners any more, and the noise reduction effect can be further improved.
The utility model discloses in, radial straight line extension or the curve extension of rim plate 1 can be followed to blade 2. Preferably, the blades 2 are twisted counterclockwise radially outward of the disk 1, see fig. 1-4.
The utility model discloses in, the impeller still can include wheel hub 7, and wheel hub 7 sets up and is used for connecting motor shaft in the center of rim plate 1.
In addition, it should be noted that high frequency noise generated by the small worm formed during the rotation of the impeller can be eliminated by the sound absorbing cotton. Wherein, inhale the sound cotton and belong to porous medium material, the air current can be changed high frequency noise into the heat through the vibration that inhales the cotton inside porous structure of sound, and then absorbs high frequency noise. The sound absorbing cotton may be installed in a duct communicating with an outlet of the fan housing.
A second aspect of the present invention provides a blower for ventilation therapy equipment, the blower includes a housing, a motor and an impeller, the impeller is installed in the housing with the motor, the motor is connected with the impeller to drive the impeller to rotate.
Wherein, the fan is centrifugal fan, and it can be used in the equipment of arbitrary needs. The impeller can be connected with a rotating shaft of the motor through a hub 7 arranged on the wheel disc 1, so that the motor can drive the impeller to rotate.
The third aspect of the present invention provides a ventilation treatment device, which comprises the blower described above.
Wherein, the ventilation treatment equipment can be a breathing machine, an oxygen therapy instrument and the like.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (10)
1. The impeller for the ventilation treatment device is characterized by comprising a wheel disc (1) and a plurality of blades (2), wherein the blades (2) are arranged on one side surface of the wheel disc (1) and are arranged at intervals along the circumferential direction of the wheel disc (1), a main flow channel (3) for a medium to flow is formed between every two adjacent blades (2), a plurality of through holes (6) corresponding to the main flow channels (3) are formed in the wheel disc (1), the blades (2) are arranged to extend from the center of the wheel disc (1) towards the edge of the wheel disc (1) and end at the inner side of the edge, and the through holes (6) are located between the tail ends of the blades (2) and the edge in the radial direction of the wheel disc (1).
2. The impeller according to claim 1, characterized in that inside each main flow channel (3) there is provided a splitter blade (4) extending in the same direction as the corresponding blade (2), the length of the splitter blade (4) being smaller than the length of the blade (2), and the tip of the splitter blade (4) being flush with the tip of the blade (2) to divide the outlet of the main flow channel (3) into two sub-flow channels (5).
3. The impeller according to claim 2, characterized in that the splitter vane (4) is located on the centre line of the primary flow channels (3), one through hole (6) per primary flow channel (3), the centre of the through hole (6) being located on the extension line of the splitter vane (4).
4. The impeller according to claim 3,
the through holes (6) are circular holes, and the diameter of the through holes (6) is 20% -60% of the width of the outlet of the sub-runner (5); or
The through holes (6) are strip-shaped holes, and the length of the through holes (6) is equal to the outlet width of the sub-runners (5).
5. The impeller according to claim 2, characterized in that the splitter vane (4) is located on the center line of the main flow channel (3), two through holes (6) per main flow channel (3), the centers of the two through holes (6) being located on the center line of the two sub flow channels (5), respectively.
6. The impeller according to claim 5,
the through hole (6) is a circular hole, and the diameter of the through hole (6) is 25% -65% of the width of the outlet of the sub-runner (5); or
The through holes (6) are strip-shaped holes, and the length of the through holes (6) is smaller than the outlet width of the sub-runners (5).
7. The impeller according to any of the claims 1 to 6, characterized in that the blades (2) are twisted counter clockwise radially outwards of the disc (1).
8. The impeller according to any of the claims 1 to 6, characterized in that it comprises a hub (7), said hub (7) being arranged in the center of said wheel disc (1) for connection to a motor shaft.
9. A blower for a ventilation therapy device, the blower comprising a housing, a motor, and an impeller according to any one of claims 1 to 8, the impeller and the motor being mounted within the housing, the motor being connected to the impeller to drive the impeller to rotate.
10. A ventilation therapy device, characterized in that it comprises a blower according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921831673.6U CN210977969U (en) | 2019-10-28 | 2019-10-28 | Impeller and fan for ventilation treatment equipment and ventilation treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921831673.6U CN210977969U (en) | 2019-10-28 | 2019-10-28 | Impeller and fan for ventilation treatment equipment and ventilation treatment equipment |
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| Publication Number | Publication Date |
|---|---|
| CN210977969U true CN210977969U (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921831673.6U Active CN210977969U (en) | 2019-10-28 | 2019-10-28 | Impeller and fan for ventilation treatment equipment and ventilation treatment equipment |
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| CN (1) | CN210977969U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944653A (en) * | 2020-07-15 | 2022-01-18 | 株式会社丰田自动织机 | Centrifugal compressor |
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2019
- 2019-10-28 CN CN201921831673.6U patent/CN210977969U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944653A (en) * | 2020-07-15 | 2022-01-18 | 株式会社丰田自动织机 | Centrifugal compressor |
| CN113944653B (en) * | 2020-07-15 | 2023-06-13 | 株式会社丰田自动织机 | Centrifugal compressor |
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