CN210951546U

CN210951546U - Air port noise reduction device, air duct, air conditioner indoor unit and air conditioner

Info

Publication number: CN210951546U
Application number: CN201921918696.0U
Authority: CN
Inventors: 董明珠; 高智强; 吴俊鸿; 刘江驰; 梁博; 李树云; 黄鑫; 陈英强
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-07-07
Anticipated expiration: 2029-11-08

Abstract

The utility model provides a device, wind channel, air conditioner of making an uproar falls in wind gap. 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. The utility model provides a pair of device, wind channel, air conditioner of making an uproar falls in wind gap, the noise of the different frequencies that form when setting up through first resonant cavity and second resonant cavity respectively to eliminating the different rotational speeds of fan, the noise reduction effect is better.

Description

Air port noise reduction device, air duct, air conditioner indoor unit and air conditioner

Technical Field

The utility model belongs to the technical field of air conditioning, concretely relates to device, wind channel, air conditioner of making an uproar falls in wind gap.

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.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model is to provide a device of making an uproar, wind channel, air conditioner indoor unit, air conditioner fall in wind gap, the noise of the different frequencies that forms when setting up through first resonant cavity and second resonant cavity respectively to eliminating the different rotational speeds of fan, the noise reduction effect is better.

In order to solve the above problem, the utility model provides a device of making an uproar falls in wind gap sets up in the wind gap department in wind channel, including first casing, be constructed a plurality of first resonant cavities, a plurality of second resonant cavities on the inboard of first casing, first resonant cavity reaches second resonant cavity mutually independent sets up, just first resonant cavity reaches the second resonant cavity is used for eliminating the first frequency noise that the fan produced when running with first rotational speed and the second frequency noise that the fan produced when running with the second rotational speed respectively.

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 utility model also provides a wind channel has the wind gap, the wind gap includes air intake and air outlet, still includes foretell wind gap and falls the device of making an uproar, the device of making an uproar is fallen in the wind gap install in on at least one in air intake, the air outlet.

The utility model also provides an air conditioner, including foretell wind channel.

The utility model also provides an air conditioner, including foretell air conditioner indoor unit.

The utility model provides a pair of device, wind channel, air conditioner of making an uproar falls in wind gap, the device of making an uproar falls in wind gap has set up different first resonant cavity and second resonant cavity and is used for eliminating the first frequency noise that the fan produced when running with first rotational speed and the second frequency noise that the fan produced when running with the second rotational speed respectively, thereby makes the device of making an uproar falls in wind gap no longer just falls to single frequency noise as among the prior art, and does benefit to the noise to the different frequencies that form when eliminating the different rotational speeds of fan, 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 another embodiment of the air duct of the present invention;

fig. 7 is the theoretical model schematic diagram of the tuyere noise reduction device of the utility model.

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 in combination, according to an embodiment of the present invention, there is provided a wind gap noise reduction device disposed at a wind gap of a wind channel 3, including a first casing 1, a plurality of first resonant cavities 11 and a plurality of second resonant cavities 12 are configured on an inner side of the first casing 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 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. 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:

l_k＝l+0.8d

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), l_kFor the corrected formula of the hole depth, it can be understood that fr may be selected as the aforementioned first frequency noise and second frequency noise, and the specific decibel value of fr is determined according to the rotation speed of the fan, and when the rotation speed of the fan is determined, the corresponding first frequency noise and second frequency noise may be obtained. 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 the utility model discloses an embodiment still provides a wind channel, has the wind gap, the wind gap includes air intake and air outlet, still includes foretell wind gap and falls the device of making an uproar, fall the device of making an uproar in the wind gap install in at least one in air intake, the air outlet, be provided with axial fan in the wind channel.

According to the utility model discloses an embodiment still provides an air conditioner, including foretell wind channel.

According to the utility model discloses an embodiment still provides an air conditioner, including foretell 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 above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the 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, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

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.