CN110793102A - Air port noise reduction device, air duct, air conditioner indoor unit and air conditioner - Google Patents
Air port noise reduction device, air duct, air conditioner indoor unit and air conditioner Download PDFInfo
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- CN110793102A CN110793102A CN201911086102.9A CN201911086102A CN110793102A CN 110793102 A CN110793102 A CN 110793102A CN 201911086102 A CN201911086102 A CN 201911086102A CN 110793102 A CN110793102 A CN 110793102A
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- air
- noise reduction
- resonant cavity
- casing
- reduction device
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- 230000000694 effects Effects 0.000 abstract description 8
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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- 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
- F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Duct Arrangements (AREA)
Abstract
The invention provides a wind gap noise reduction device, an air duct, an air conditioner indoor unit and an air conditioner. The air port noise reduction device is arranged at an air port of the air duct and comprises a first shell, wherein a plurality of first resonant cavities and a plurality of second resonant cavities are formed in the inner side of the first shell, the first resonant cavities and the second resonant cavities are arranged independently, and the first resonant cavities and the second resonant cavities are respectively used for eliminating first frequency noise generated when the fan runs at a first rotating speed and second frequency noise generated when the fan runs at a second rotating speed. According to the air port noise reduction device, the air duct, the air conditioner indoor unit and the air conditioner, noise of different frequencies formed when the fan rotates at different speeds is eliminated through the arrangement of the first resonant cavity and the second resonant cavity, and the noise reduction effect is better.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to an air port noise reduction device, an air duct, an air conditioner indoor unit and an air conditioner.
Background
The axial flow fan has the characteristics of large flow and low power consumption, is widely applied to an air conditioner heat exchange system, and is the direction pursued by air conditioner manufacturers to develop a low-noise and high-efficiency fan system along with the higher and higher requirements of consumers on the noise quality of an air conditioner.
The noise of the fan is a main factor influencing the total noise value of the air conditioner, the noise energy of the fan is usually concentrated in a middle-low frequency range below 1000Hz, the conventional noise reduction measures need to reduce the wind noise and cannot obviously influence the ventilation volume of the air flow in the air duct, and the challenge is very high. In the prior art, in order to guarantee the air supply effect, all wrap up whole fan system in the wind channel, set up a plurality of apertures of making an uproar that fall on the inner wall in wind channel, although play certain reduction to fan department noise, but there is the not enough of the frequency of making an uproar that falls, this is to the condition of the different operating speed of fan when air conditioner system is in different mode, the noise reduction effect is not good, especially can not realize making an uproar to fan low frequency section abnormal peak value (for example 300Hz, frequency sections such as 600 Hz), lead to the noise reduction effect of fan system (air conditioning system) relatively poor.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to provide an air outlet noise reduction device, an air duct, an air conditioner indoor unit, and an air conditioner, wherein the noise reduction device has a better noise reduction effect by the arrangement of the first resonant cavity and the second resonant cavity respectively for eliminating the noise with different frequencies generated by the fan at different rotation speeds.
In order to solve the above problems, the present invention provides a wind gap noise reduction device, disposed at a wind gap of a wind channel, including a first casing, wherein a plurality of first resonant cavities and a plurality of second resonant cavities are configured on an inner side of the first casing, the first resonant cavities and the second resonant cavities are independently disposed, and the first resonant cavities and the second resonant cavities are respectively used for eliminating a first frequency noise generated when a fan operates at a first rotation speed and a second frequency noise generated when the fan operates at a second rotation speed.
Preferably, the volume of the first resonant cavity is different from the volume of the second resonant cavity.
Preferably, the tuyere noise reduction device further comprises a second casing, the inner side of the first casing is provided with a plurality of vertically and horizontally staggered vertical walls, the plurality of vertically and horizontally staggered vertical walls form a cavity bottom wall of the first resonant cavity and/or the second resonant cavity, the second casing covers one side of the vertical wall far away from the first casing, the second casing is provided with a plurality of holes, and the plurality of holes are respectively arranged in one-to-one correspondence with the plurality of first resonant cavities and the plurality of second resonant cavities.
Preferably, the first housing is annular, and the first resonant cavity and/or the second resonant cavity are uniformly arranged along the annular circumference of the first housing; and/or the first housing is annular, and the first resonant cavity and/or the second resonant cavity are sequentially arranged along the axial extension direction of the first housing.
Preferably, the first housing is annular, and the first resonant cavities and the second resonant cavities are sequentially, uniformly and alternately arranged at intervals along the annular circumference of the first housing.
Preferably, the diameter of the hole is D, and D is more than or equal to 2mm and less than or equal to 4 mm; and/or the thickness of the second shell is s, and s is more than or equal to 0.5mm and less than or equal to 1 mm; and/or the thickness of the first shell is h, and h is more than or equal to 2mm and less than or equal to 3 mm.
Preferably, the first frequency is 300 Hz; the second frequency is 600 Hz.
The invention also provides an air duct which is provided with an air port, wherein the air port comprises an air inlet and an air outlet, and the air port noise reduction device is arranged on at least one of the air inlet and the air outlet.
The invention also provides an air conditioner indoor unit comprising the air duct.
The invention also provides an air conditioner which comprises the air conditioner indoor unit.
According to the air port noise reduction device, the air duct, the air conditioner indoor unit and the air conditioner, the air port noise reduction device is provided with the first resonant cavity and the second resonant cavity which are different, and the first resonant cavity and the second resonant cavity are respectively used for eliminating first frequency noise generated when the fan rotates at the first rotating speed and second frequency noise generated when the fan rotates at the second rotating speed, so that the air port noise reduction device does not reduce noise only aiming at single frequency noise as in the prior art, noise of different frequencies formed when the fan rotates at different speeds is favorably eliminated, and the noise reduction effect is better.
Drawings
FIG. 1 is a schematic perspective view of a tuyere noise reduction device according to an embodiment of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a partial structural view of the first resonant cavity of FIG. 1;
FIG. 4 is a schematic structural view of a tuyere noise reduction device according to another embodiment of the present invention;
FIG. 5 is a schematic perspective view of an air duct according to an embodiment of the present invention;
FIG. 6 is a schematic perspective view of an alternative air duct according to an embodiment of the present invention;
fig. 7 is a schematic view of a theoretical model of the tuyere noise reduction device of the present invention.
The reference numerals are represented as:
1. a first housing; 11. a first resonant cavity; 12. a second resonant cavity; 13. erecting a wall; 2. a second housing; 21. an aperture; 3. an air duct.
Detailed Description
Referring to fig. 1 to 7, according to an embodiment of the present invention, an air outlet noise reduction device is provided, which is disposed at an air outlet of an air duct 3, and includes a first housing 1, wherein a plurality of first resonant cavities 11 and a plurality of second resonant cavities 12 are configured on an inner side of the first housing 1, the first resonant cavities 11 and the second resonant cavities 12 are disposed independently of each other, and the first resonant cavities 11 and the second resonant cavities 12 are respectively configured to eliminate a first frequency noise generated when a fan operates at a first rotation speed and a second frequency noise generated when the fan operates at a second rotation speed. In the technical scheme, the air port noise reduction device is provided with the first resonant cavity 11 and the second resonant cavity 12 which are different from each other and are respectively used for eliminating first frequency noise generated when the fan operates at a first rotating speed and second frequency noise generated when the fan operates at a second rotating speed, so that the air port noise reduction device does not reduce noise only aiming at single frequency noise as in the prior art, noise of different frequencies formed when the fan operates at different rotating speeds is favorably eliminated, and the noise reduction effect is better.
The first resonant cavity 11 and the second resonant cavity 12 are designed in a matching manner according to a target frequency (or a frequency range, such as the first frequency noise and the second frequency noise) to be cancelled, and a corresponding calculation model is shown in fig. 7, where a calculation formula of the main target cancellation frequency is as follows:
in the formula (f)rIs the target muffling frequency (in Hz), C is the sound velocity (in mm/S), S0Is a small hole cross-sectional area (unit mm)2) D is the diameter of the hole (in mm), l is the depth of the hole (in mm), lkFor a modified formula of the hole depth, it can be understood that frThe first frequency noise and the second frequency noise can be selected, the specific decibel value is based on the rotating speed of the fan, and after the rotating speed of the fan is determined, the corresponding first frequency noise can be obtainedAnd second frequency noise. For example, the inventor finds that the frequency range of the current air duct noise reduction structure for noise reduction is more than 1000Hz, and the lower frequency noise such as 300Hz and 600Hz is not eliminated, which results in that the noise reduction effect of the current air conditioner air duct noise is not ideal, therefore, preferably, the first frequency is selected to be 300Hz, and the second frequency is selected to be 600 Hz.
It can be seen from the above formula that the muffling frequency depends mainly on the diameter of the small hole and the volume of the cavity behind the hole, and the smaller the hole and the larger the cavity behind the hole, the lower the overall muffling frequency, but the first resonant cavity 11 and the second resonant cavity 12 can be constructed based on the theory here, and of course, the way can be various, for example, the hole diameter of the small hole is changed while keeping the same volume of the cavity, or the hole diameter of the small hole is kept the same and the volume (i.e. volume) of the cavity corresponding to the small hole is different. Preferably, the volume of the first resonant cavity 11 is different from the volume of the second resonant cavity 12, and the aperture of the small holes on the first resonant cavity 11 and the second resonant cavity 12 are the same, so that when the first resonant cavity 11 and the second resonant cavity 12 are formed by adopting a split assembly manner, the confusion of the assembly directions caused by the difference of the aperture of the small holes but the small aperture difference can be effectively prevented.
As a specific embodiment of the first resonant cavity 11 and the second resonant cavity 12, preferably, the tuyere noise reduction device further includes a second casing 2, the first casing 1 has a plurality of vertically and horizontally staggered vertical walls 13 on the inner side thereof, the plurality of vertically and horizontally staggered vertical walls 13 form a cavity bottom wall of the first resonant cavity 11 and/or the second resonant cavity 12, the second casing 2 covers a side of the vertical walls 13 away from the first casing 1, the second casing 2 is configured with a plurality of holes 21, the plurality of holes 21 are respectively disposed in one-to-one correspondence with the plurality of first resonant cavities 11 and the plurality of second resonant cavities 12, and it can be understood that the holes 21 herein also correspond to the small holes. In this technical solution, the first resonant cavity 11 and the second resonant cavity 12 are formed by the first casing 1, the second casing 2 and the plurality of vertical walls 13 therebetween, so that the structural design of the tuyere noise reduction device is simpler and more reliable, and further, the plurality of vertical walls 13 on the first casing 1 and the second casing 2 can be formed by injection molding, and the second casing 2 can be formed by injection molding alone, and then the two are assembled to form the tuyere noise reduction device, so that the manufacturing process thereof is optimized. The configuration and arrangement of the criss-cross standing walls 13 may also be varied, and fig. 2 shows a specific example, in which the structural form of the plurality of standing walls 13 is different, and specifically, the standing walls include a plurality of first standing walls spaced along the axial direction of the first housing 1, the plurality of first standing walls extend toward the radial inner side of the first housing 1, a space is formed between two adjacent first standing walls, the adjacent space distance may be the same or different, and a plurality of second standing walls spaced along the circumferential direction of the first housing 1 are disposed in the space, a space is formed between two adjacent second standing walls, the adjacent space distance may be the same or different, thereby forming a surrounding joint for the cavity bottom walls of the first resonant cavity 11 and the second resonant cavity 12.
At this time, the diameter of the hole 21 is D (i.e. D), D is 2mm or more and 4mm or less, so that the structural strength of the second housing 2 can be ensured and the small hole resonance can be exerted, and it can be understood that D is herein; and/or the thickness of the second shell 2 is s (i.e. l in the formula), and s is more than or equal to 0.5mm and less than or equal to 1 mm; and/or the thickness of the first shell 1 is h, h is more than or equal to 2mm and less than or equal to 3mm, and the thickness limitation of the first shell 1 and the second shell 2 can ensure that the corresponding structures have enough rigidity.
Preferably, the first housing 1 is annular, such as circular ring in fig. 1, or square ring in fig. 6, and the first resonant cavity 11 and/or the second resonant cavity 12 are uniformly arranged along the annular circumference of the first housing 1, in this case, it can be understood that the first resonant cavity 11 and the second resonant cavity 12 are symmetrically arranged around the central axis of the annular shape of the first housing 1, so as to uniformly reduce noise in the circumferential direction of the air duct 3; and/or the first housing 1 is annular, and the first resonant cavity 11 and/or the second resonant cavity 12 are sequentially arranged along the axial extension direction of the first housing 1. In another embodiment, the first housing 1 is annular, and the first resonant cavities 11 and the second resonant cavities 12 are sequentially and uniformly spaced apart from each other in an annular circumferential direction of the first housing 1.
Fig. 4 shows another structure of the tuyere noise reduction device, in which besides the first resonant cavity 1 and the second resonant cavity 2, other resonant cavities with different volumes are also constructed, and it is worth emphasizing that the serial numbers 1-15 in the figure define 15 resonant cavities, which may be different in volume, and at this time, theoretically they can correspond to the elimination of 15 noise frequencies, and of course, the volume sizes of these 15 resonant cavities may also be equally distributed and arranged, for example, the volumes of resonant cavities No. 1, No. 6, No. 11 in fig. 1 are the same, the volumes of resonant cavities No. 2, No. 7, No. 12 are the same, the volumes of resonant cavities No. 3, No. 8, No. 13 are the same, the volumes of resonant cavities No. 4, No. 9, No. 14 are the same, and the volumes of resonant cavities No. 5, No. 10, No. 15 are the same, thereby dividing the 15 resonant cavities into 5 groups and uniformly spaced along the circumference of the first housing 1, forming a cancellation of 5 noise frequencies; the volumes of the resonant cavities 1, 4, 7, 10 and 13 are the same, the volumes of the resonant cavities 2, 5, 8, 11 and 14 are the same, and the volumes of the resonant cavities 3, 6, 9, 12 and 15 are the same, so that the 15 resonant cavities are divided into 3 groups and uniformly distributed at intervals along the circumferential direction of the first shell 1, and 3 noise frequencies can be eliminated.
According to an embodiment of the present invention, there is also provided an air duct having an air opening, the air opening including an air inlet and an air outlet, and the air opening noise reduction device described above, the air opening noise reduction device being mounted on at least one of the air inlet and the air outlet, and an axial flow fan being disposed in the air duct.
According to an embodiment of the invention, an air conditioner indoor unit is further provided, which comprises the air duct.
According to an embodiment of the invention, an air conditioner is also provided, which comprises the air conditioner indoor unit.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a device of making an uproar falls in wind gap, sets up in the wind gap department of wind channel (3), its characterized in that includes first casing (1), construct a plurality of first resonant cavities (11), a plurality of second resonant cavity (12) on the inboard of first casing (1), first resonant cavity (11) and second resonant cavity (12) set up each other independently, and first resonant cavity (11) and second resonant cavity (12) are used for eliminating the first frequency noise that produces when the fan operates with first rotational speed and the second frequency noise that produces when the fan operates with the second rotational speed respectively.
2. A tuyere noise reduction device according to claim 1, characterized in that the volume of the first resonance chamber (11) is different from the volume of the second resonance chamber (12).
3. The tuyere noise reduction device according to claim 1 or 2, further comprising a second casing (2), wherein the first casing (1) has a plurality of vertically and horizontally staggered vertical walls (13) on the inner side thereof, the plurality of vertically and horizontally staggered vertical walls (13) form a bottom wall of the first resonant cavity (11) and/or the second resonant cavity (12), the second casing (2) covers a side of the vertical wall (13) away from the first casing (1), the second casing (2) is configured with a plurality of holes (21), and the plurality of holes (21) are respectively arranged in one-to-one correspondence with the plurality of first resonant cavities (11) and the plurality of second resonant cavities (12).
4. The tuyere noise reduction device according to claim 3, wherein the first casing (1) is annular, and the first resonant cavity (11) and/or the second resonant cavity (12) are uniformly arranged along an annular circumference of the first casing (1); and/or the first housing (1) is annular, and the first resonant cavity (11) and/or the second resonant cavity (12) are arranged in sequence along the axial extension direction of the first housing (1).
5. The tuyere noise reduction device according to claim 3, wherein the first casing (1) is annular, and the first resonant cavities (11) and the second resonant cavities (12) are sequentially and uniformly alternately arranged along the annular circumference of the first casing (1).
6. A tuyere noise reduction device according to claim 3, characterized in that the diameter of the hole (21) is D, 2mm ≤ D ≤ 4 mm; and/or the thickness of the second shell (2) is s, and s is more than or equal to 0.5mm and less than or equal to 1 mm; and/or the thickness of the first shell (1) is h, and h is more than or equal to 2mm and less than or equal to 3 mm.
7. The tuyere noise reduction device according to claim 1, wherein the first frequency is 300 Hz; the second frequency is 600 Hz.
8. An air duct having an air inlet, the air inlet comprising an air inlet and an air outlet, further comprising the air inlet noise reduction device of any one of claims 1 to 7, the air inlet noise reduction device being mounted on at least one of the air inlet and the air outlet.
9. An indoor unit of an air conditioner, comprising an air duct, wherein the air duct is the air duct according to claim 8.
10. An air conditioner comprising an air conditioner indoor unit, wherein the air conditioner indoor unit is the air conditioner indoor unit according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911086102.9A CN110793102A (en) | 2019-11-08 | 2019-11-08 | Air port noise reduction device, air duct, air conditioner indoor unit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911086102.9A CN110793102A (en) | 2019-11-08 | 2019-11-08 | Air port noise reduction device, air duct, air conditioner indoor unit and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110793102A true CN110793102A (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911086102.9A Withdrawn CN110793102A (en) | 2019-11-08 | 2019-11-08 | Air port noise reduction device, air duct, air conditioner indoor unit and air conditioner |
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|---|---|
| CN (1) | CN110793102A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623251A (en) * | 2021-08-30 | 2021-11-09 | 苏州浪潮智能科技有限公司 | Pneumatic noise elimination device and noise elimination fan |
| CN114165481A (en) * | 2021-09-13 | 2022-03-11 | 荣耀终端有限公司 | Fan device and electronic equipment |
| WO2022111280A1 (en) * | 2020-11-30 | 2022-06-02 | 广东美的白色家电技术创新中心有限公司 | Range hood |
| CN114688638A (en) * | 2020-12-25 | 2022-07-01 | 广东美的白色家电技术创新中心有限公司 | Fan structure and air conditioner |
-
2019
- 2019-11-08 CN CN201911086102.9A patent/CN110793102A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022111280A1 (en) * | 2020-11-30 | 2022-06-02 | 广东美的白色家电技术创新中心有限公司 | Range hood |
| CN114576661A (en) * | 2020-11-30 | 2022-06-03 | 广东美的白色家电技术创新中心有限公司 | Smoke machine |
| CN114688638A (en) * | 2020-12-25 | 2022-07-01 | 广东美的白色家电技术创新中心有限公司 | Fan structure and air conditioner |
| CN114688638B (en) * | 2020-12-25 | 2023-09-01 | 广东美的白色家电技术创新中心有限公司 | Fan structure and air conditioner |
| CN113623251A (en) * | 2021-08-30 | 2021-11-09 | 苏州浪潮智能科技有限公司 | Pneumatic noise elimination device and noise elimination fan |
| CN114165481A (en) * | 2021-09-13 | 2022-03-11 | 荣耀终端有限公司 | Fan device and electronic equipment |
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Application publication date: 20200214 |