CN112815404A - Outdoor unit of air conditioner - Google Patents
Outdoor unit of air conditioner Download PDFInfo
- Publication number
- CN112815404A CN112815404A CN202110014190.2A CN202110014190A CN112815404A CN 112815404 A CN112815404 A CN 112815404A CN 202110014190 A CN202110014190 A CN 202110014190A CN 112815404 A CN112815404 A CN 112815404A
- Authority
- CN
- China
- Prior art keywords
- sound absorption
- sound
- layer
- absorption layer
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/08—Compressors specially adapted for separate outdoor units
- F24F1/12—Vibration or noise prevention thereof
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
The invention discloses an air conditioner outdoor unit, which comprises a compressor and a compressor sound insulation cover; the sound insulation cover comprises two sound absorption layers, a sound insulation layer or at least three sound absorption layers; the two sound absorption layers are respectively a first sound absorption layer and a second sound absorption layer, are extension layers made of different sound absorption materials and are sequentially arranged from inside to outside to form a containing cavity; the compressor is fixedly arranged in the containing cavity; the absolute value of the acoustic reactance of the second sound absorption layer is smaller than that of the first sound absorption layer; the sound insulation layer is an extension layer made of sound insulation materials and is positioned on the outer side of the second sound absorption layer and connected with the second sound absorption layer. The at least three sound absorption layers are extension layers made of different sound absorption materials and are sequentially arranged from inside to outside to form a containing cavity; the absolute value of the acoustic reactance of the middle sound absorption layer is the minimum of the absolute values of the acoustic reactance; the absolute value of the acoustic reactance of the outer sound absorption layer is the largest of the absolute values of the acoustic reactance; the absolute value of the acoustic reactance of the inner sound absorption layer is between the acoustic reactance of the middle sound absorption layer and the acoustic reactance of the outer sound absorption layer.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to an air conditioner outdoor unit.
Background
Generally, an air conditioner compresses a refrigerant by a compressor to change the refrigerant phase to phase, thereby achieving a cooling or heating function. The compressor compresses the gas refrigerant, and the noise is great. Dealing with compressor noise has been a technical challenge for air conditioner manufacturers.
The existing air conditioner noise reduction mostly adopts a method of arranging a sound absorption cover and/or a sound insulation cover for a compressor, and a certain noise reduction result is obtained. However, as the living standard of people is improved, the attention on environmental noise is more and more; the requirements for environmental noise are also increasing.
Because the sound absorption materials used by the existing sound absorption cover and the sound insulation cover are single, the sound insulation effect of the sound absorption cover and the sound insulation cover is difficult to greatly improve. Namely, a needle felt, a white felt or a green felt on the market is different in sound absorption material, but the sound absorption curves are not very different, so that the sound insulation and absorption effects can be increased only from the thickness. In the aspect of the structural design of the cover body, most of the design schemes of single porous sound absorption material and single-layer sound insulation material are adopted, sound waves enter the sound absorption material, are transmitted and dissipated in the sound absorption material, and are reflected or transmitted to the sound insulation material, reflected waves are transmitted to the air through the sound absorption material, and are transmitted back and forth only once through the sound absorption material, so that the sound wave energy consumption is limited, and the sound insulation effect has a larger space for improvement.
Disclosure of Invention
In order to solve the problem of high noise of the outdoor unit of the air conditioner caused by the unsatisfactory sound insulation effect of the sound insulation cover of the compressor in the prior art, the invention provides the outdoor unit of the air conditioner, which improves the sound insulation effect of the sound insulation cover of the compressor, reduces the noise of the outdoor unit of the air conditioner and improves the user experience.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an air conditioner outdoor unit, which comprises a compressor and a compressor sound insulation cover, wherein the compressor is provided with a sound insulation cover;
the compressor sound insulation cover comprises two sound absorption layers and a sound insulation layer;
the two sound absorption layers are respectively a first sound absorption layer and a second sound absorption layer which are extension layers made of different sound absorption materials; the first sound absorption layer and the second sound absorption layer are sequentially arranged from inside to outside to form a cavity for accommodating the compressor; the compressor is fixedly arranged in the containing cavity; the absolute value of the acoustic reactance of the second sound absorption layer is smaller than the absolute value of the acoustic reactance of the first sound absorption layer;
the sound insulation layer is an extension layer made of sound insulation materials, is arranged on the outer side of the second sound absorption layer and is connected with the second sound absorption layer.
In an embodiment, the sound absorption coefficient of the second sound absorption layer is greater than the sound absorption coefficient of the first sound absorption layer.
The invention also provides an air conditioner outdoor unit, which comprises a compressor and a compressor sound insulation cover;
the compressor sound insulation cover comprises at least three sound absorption layers which are extension layers made of different sound absorption materials; the sound absorption layers are sequentially arranged from inside to outside to form a containing cavity for containing the compressor; the compressor is fixedly arranged in the containing cavity;
the absolute value of the sound resistance of the sound absorption layer positioned in the middle layer is the smallest of the absolute values of the sound resistance of the sound absorption layers; the absolute value of the sound resistance of the sound absorption layer positioned on the outer layer is the largest in the absolute values of the sound resistance of the sound absorption layers; the absolute value of the acoustic reactance of the sound absorption layer positioned on the inner layer is positioned between the absolute value of the acoustic reactance of the sound absorption layer positioned on the middle layer and the absolute value of the acoustic reactance of the sound absorption layer positioned on the outer layer.
In one embodiment, the number of the sound absorption layers is three, and the three sound absorption layers are respectively a first sound absorption layer, a second sound absorption layer and a third sound absorption layer which are sequentially arranged from inside to outside to form a cavity for accommodating the compressor;
the absolute value of the acoustic reactance of the second sound absorption layer is the smallest of the absolute values of the acoustic reactance of the three sound absorption layers; the absolute value of the acoustic reactance of the third sound absorption layer is the largest of the absolute values of the acoustic reactance of the three sound absorption layers; the absolute value of the acoustic reactance of the first sound-absorbing layer is between the absolute value of the acoustic reactance of the second sound-absorbing layer and the absolute value of the acoustic reactance of the third sound-absorbing layer.
In one embodiment, the sound absorption coefficient of the second sound absorption layer is the largest of the sound absorption coefficients of the sound absorption layers.
In one embodiment, the compressor sound insulation cover further comprises a sound insulation layer which is an extension layer made of sound insulation materials; the puigging set up in the outside of third sound-absorbing layer, with the third sound-absorbing layer is connected.
In some embodiments, the first sound absorption layer, the second sound absorption layer and the third sound absorption layer are made of grey felt, double-component cotton and white felt respectively.
In some embodiments, the first acoustic layer has a thickness in the range of 2mm to 30 mm; the thickness range of the second sound absorption layer is 2 mm-30 mm; the thickness range of the third sound absorption layer is 2 mm-30 mm.
In some embodiments, the first sound absorbing layer has a thickness of 10 mm; the thickness of the second sound absorption layer is 10 mm; the thickness of the third sound absorption layer is 10 mm.
In some embodiments, the sound insulation layer is made of a metal material.
Compared with the prior art, the technical scheme of the invention has the following technical effects:
the invention relates to an air conditioner outdoor unit, which comprises a compressor and a compressor sound insulation cover for accommodating the compressor; the sound insulation cover consists of at least two sound absorption layers and a sound insulation layer or at least three sound absorption layers; the sound absorption layers and the sound insulation layers or the sound absorption layers are sequentially arranged from inside to outside to form a containing cavity for containing the compressor; the absolute value of the acoustic reactance rate of the sound absorption layer positioned in the middle layer is the minimum value of the absolute values of the acoustic reactance rates of the sound absorption layers and the sound insulation layers; the absolute value of the acoustic reactance rate of the sound absorption layer positioned in the inner layer is greater than that of the sound absorption layer positioned in the middle layer; the sound resistance of the sound insulation layer or the sound absorption layer positioned on the outer layer is the largest in absolute value; the structure can enable the noise generated by the compressor to enter the sound absorption layer of the inner layer from the interface between the sound absorption layer of the inner layer and air easily; then the light enters the sound absorption layer of the middle layer, is absorbed by the sound absorption layer of the middle layer or is projected to the sound insulation layer with stronger reflection performance or the sound absorption layer of the outer layer, is reflected by the sound insulation layer or the sound absorption layer of the outer layer, is reflected back and forth between the interface of the sound absorption layer of the inner layer and the sound absorption layer of the middle layer and the interface of the sound absorption layer of the middle layer and the sound absorption layer of the outer layer or the sound insulation layer, and is finally absorbed by the sound absorption layer of the; because the noise is absorbed by the sound absorption layer of the middle layer for multiple times, the noise projected into the air is reduced to a greater extent, the sound insulation effect of the sound insulation cover of the compressor is improved, the noise of the outdoor unit of the air conditioner is reduced, and the environment is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an air conditioner outdoor unit according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating an installation structure of a compressor of an outdoor unit of an air conditioner according to the present invention;
FIG. 3 is a schematic structural view of a compressor sound-proof cover;
FIG. 4 is a partially enlarged schematic view of the compressor sound shield;
FIG. 5 is a graphical representation of acoustic resistivity measurements for various sound absorbing materials;
FIG. 6 is a graphical representation of acoustic reactance measurements for each sound absorbing material;
fig. 7 is a graph of noise measurement data for each pattern.
Reference numerals:
1. a compressor sound insulating cover; 2. a compressor; 11. a first sound absorbing layer; 12. a second sound absorbing layer; 13. a third sound absorbing layer; 14. a sound insulating layer; 15. a cover body; 16. a hood;
I. a first interface surface; II. A second interface surface; III, a third interface; IV, fourth interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the description of the invention to indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the invention.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In an embodiment, referring to fig. 1, 2, 3 and 4, the outdoor unit of the air conditioner includes a compressor 2 and a compressor sound insulation cover 1. The compressor sound insulation cover 1 comprises two sound absorption layers and a sound insulation layer 14;
the two sound absorption layers are extension layers made of different sound absorption materials, namely a first sound absorption layer 11 and a second sound absorption layer 12 which are sequentially arranged from inside to outside to form a containing cavity for containing the compressor 2; the compressor 2 is fixedly arranged in the containing cavity.
The absolute value of the acoustic reactance of the first sound-absorbing layer 11 is greater than the absolute value of the acoustic reactance of the second sound-absorbing layer 12, i.e., the first sound-absorbing layer 11 has better performance in reflecting noise than the second sound-absorbing layer 12.
The soundproof layer is an extension layer made of soundproof material, is arranged on the outer side of the second sound absorption layer 12, is connected with the second sound absorption layer 12, and accommodates the first sound absorption layer 11, the second sound absorption layer 12 and the compressor 2. The sound-insulating layer 14 has better sound-reflecting properties than the first sound-absorbing layer 11 and the second sound-absorbing layer 12, and reflects noise reaching the surfaces thereof, thereby achieving the effect of isolating noise and reducing transmission of noise from the compressor 2 to the outside environment.
The compressor sound insulation cover 1 of the air conditioner outdoor unit of the embodiment includes two sound absorption layers and a sound insulation layer 14, and the two sound absorption layers and the sound insulation layer 14 are arranged from inside to outside and connected to form a cavity for accommodating the compressor 2. Because the absolute value of the acoustic reactance of the first sound absorption layer 11 is smaller than the absolute value of the acoustic reactance of the second sound absorption layer 12, the noise generated by the compressor 2 is easy to enter the first sound absorption layer 11 through the incident surface of the first sound absorption layer 11, and is reflected for multiple times between the interface of the first sound absorption layer 11 and the second sound absorption layer 12 and the interface of the second sound absorption layer 12 and the sound insulation layer 14, and is absorbed for multiple times by the second sound absorption layer 12 in the reflection process, so that the noise absorption rate and the absorption efficiency of the compressor sound insulation cover 1 are improved. The embodiment reduces the noise generated by the compressor 2 of the air conditioner outdoor unit and improves the environment.
In an embodiment, the sound absorption coefficient of the second sound absorption layer 12 is greater than the sound absorption coefficient of the first sound absorption layer 11; when the noise generated by the compressor 2 is reflected and transmitted for multiple times between the interface of the first sound absorption layer 11 and the second sound absorption layer 12 and the interface of the second sound absorption layer 12 and the sound insulation layer 14, the second sound absorption layer 12 can absorb the noise which is transmitted back and forth in the second sound absorption layer 12 more quickly, and the noise absorption efficiency is improved.
In an embodiment, referring to fig. 1, 2, 3 and 4, the outdoor unit of the air conditioner includes a compressor 2 and a compressor sound insulation cover 1; the compressor sound-insulating cover 1 comprises at least three sound-absorbing layers.
Each sound absorption layer is an extension layer made of different sound absorption materials, the extension layers are sequentially arranged from inside to outside to form a containing cavity for containing the compressor 2, and the compressor 2 is fixedly arranged in the containing cavity.
Each sound absorption layer of the compressor sound insulation cover 1 forms three interfaces, and the interface between the sound absorption layer of the inner layer and the air in the compressor sound insulation cover 1 is a first interface I; the interface between the sound absorption layer of the inner layer and the sound absorption layer of the middle layer is a second interface II; the interface between the sound absorption layer of the middle layer and the sound absorption layer of the outer layer is a third interface III.
The absolute value of the acoustic reactance of the sound absorption layer positioned in the middle layer is the smallest of the absolute values of the acoustic reactance of the sound absorption layers; the absolute value of the acoustic reactance of the sound absorption layer positioned on the outer layer is the largest of the absolute values of the acoustic reactance of the sound absorption layers; the absolute value of the sound reactance rate of the sound absorption layer positioned at the inner layer is positioned between the absolute value of the sound reactance rate of the sound absorption layer positioned at the middle layer and the absolute value of the sound reactance rate of the sound absorption layer positioned at the outer layer.
The compressor sound insulation cover 1 of the outdoor unit of the air conditioner of the present embodiment is a cavity for accommodating the compressor 2, which is formed by at least three sound absorption layers arranged in sequence from inside to outside. The absolute value of the acoustic reactance of the sound absorption layer of the inner layer is the middle of the absolute value of the acoustic reactance of each sound absorption layer, so that the noise generated by the compressor 2 is more easily incident into the sound absorption layer of the inner layer from the first interface I.
The absolute value of the acoustic reactance rate of the sound absorption layer of the outer layer is the largest value of the absolute values of the acoustic reactance rates of the sound absorption layers; the value of the acoustic reactance of the sound-absorbing layer of the middle layer is the smallest of the absolute values of the acoustic reactance of the sound-absorbing layers. The second interface II has certain reflection performance; the third interface III has better reflection performance; the noise entering the middle sound absorption layer is absorbed by the middle sound absorption layer or is absorbed by the middle sound absorption layer in the reciprocating reflection process between the second interface II and the third interface III, the absorption rate of the noise is improved, the sound absorption effect and the sound insulation effect of the compressor sound insulation cover 1 are enhanced, the noise of the outdoor unit of the air conditioner is reduced, and the environment is improved.
In addition, because the outer sound absorption layer also has sound absorption performance, most of the noise transmitted to the outer sound absorption layer is absorbed by the outer sound absorption layer, the sound absorption effect and the sound insulation effect of the compressor sound insulation cover 1 are further enhanced, the noise of the outdoor unit of the air conditioner is reduced, and the environment is improved.
In an embodiment, referring to fig. 1, 2, 3, and 4, three sound absorption layers are provided, which are a first sound absorption layer 11, a second sound absorption layer 12, and a third sound absorption layer 13, which are sequentially arranged from inside to outside to form a cavity for accommodating the compressor 2, and the compressor 2 is fixedly disposed in the cavity.
Each sound absorption layer of the compressor sound insulation cover 1 forms three interfaces, and the interface of the first sound absorption layer 11 and the air in the compressor sound insulation cover 1 is a first interface I; the interface of the first sound absorption layer 11 and the second sound absorption layer 12 is a second interface II; the interface of the second sound-absorbing layer 12 and the third sound-absorbing layer 13 is a third interface III.
The absolute value of the acoustic reactance of the second sound-absorbing layer 12 is the smallest of the absolute values of the acoustic reactance of the three sound-absorbing layers; the absolute value of the acoustic reactance of the third sound-absorbing layer 13 is the largest of the sound-absorbing coefficients of the three sound-absorbing layers; the absolute value of the acoustic reactance of the first sound-absorbing layer 11 lies between the absolute value of the acoustic reactance of the second sound-absorbing layer 12 and the absolute value of the acoustic reactance of the third sound-absorbing layer 13.
In the embodiment, the three sound absorption layers realize the transmission of the first interface I, the absorption of the first sound absorption layer 11, the reflection of the second interface II, the multiple absorption of the second sound absorption layer 12, the reflection of the third interface III and the absorption of the third sound absorption layer 13. The high noise absorption rate of the compressor sound insulation cover 1 is realized, the noise of the air conditioner outdoor unit is reduced, and the environment is improved.
In one embodiment, the sound absorption coefficient of the second sound absorption layer 12 is the largest sound absorption coefficient of the three sound absorption layers, so that the sound absorption efficiency of the compressor sound insulation cover 1 is improved. Further reduce the noise of air condensing units, further improve the environment.
In an embodiment, referring to fig. 1, 2, 3 and 4, the compressor sound-insulating cover 1 further comprises a sound-insulating layer 14, which is an extended layer made of a sound-insulating material; the sound insulation layer is arranged on the outer side of the third sound absorption layer 13 and connected with the third sound absorption layer 13 to form a fourth interface IV and a cavity for accommodating the third sound absorption layer 13; the sound insulation layer 14 accommodates the sound absorption layers and the compressor 2 or wraps the third sound absorption layer 13.
The compressor sound insulation cover 1 of the air conditioner outdoor unit of the embodiment further includes a sound insulation layer 14, which is located outside the third sound absorption layer 13, and a fourth interface IV formed by connecting the sound insulation layer 14 and the third sound absorption layer 13 has a relatively strong reflection performance, and reflects the noise transmitted by the third sound absorption layer 13, so that the noise is absorbed by the third sound absorption layer 13 and even other sound absorption layers, thereby further enhancing the functions of the compressor sound insulation cover 1 for isolating and absorbing the noise, further reducing the noise generated by the compressor 2 of the air conditioner outdoor unit, and further improving the environment.
In one embodiment, the first sound absorbing layer 11, the second sound absorbing layer 12 and the third sound absorbing layer 13 are made of grey felt, double-component cotton and white felt respectively.
Preferably, the thickness of the first sound-absorbing layer 11 ranges from 2mm to 30 mm; the thickness range of the second sound absorption layer 12 is 2 mm-30 mm; the thickness of the third sound-absorbing layer 13 ranges from 2mm to 30 mm.
Further preferably, the thickness of the first sound absorption layer 11 is 10 mm; the thickness of the second sound-absorbing layer 12 is 10 mm; the thickness of the third sound-absorbing layer 13 is 10 mm.
Preferably, the sound insulation layer 14 is made of metal.
In one embodiment, referring to fig. 1, 2, 3 and 4, the compressor sound insulation cover 1 includes a cover body 15 and a cover cap 16; the cover body 15 is cylindrical and is used for surrounding and blocking the periphery of the side part of the compressor 2, and the lower end of the cover body is fixedly connected with the shell of the air conditioner outdoor unit; the cover cap 16 is located at the upper end of the cover body 15, is detachably and fixedly connected with the cover body 15, and is used for plugging the upper end of the cover body 15 and shielding the upper end of the compressor 2.
The structure of the compressor sound insulation cover 1 of the embodiment enables the compressor sound insulation cover to be conveniently opened, so that the compressor 2 is convenient to check and maintain, and the maintenance efficiency of the compressor 2 is improved.
In one embodiment, the acoustic reactance and the acoustic absorption coefficient of each acoustic absorption layer are calculated by the following formula:
Zs＝-jρc cot k1
in the formula: alpha is sound absorption coefficient;
Zssurface specific acoustic impedance;
ρ is the air density;
c is the air sound velocity;
k is the wave number in the sound absorbing material;
l is the thickness of the sound absorption material;
Rein order to extract a real part function of a complex number, a numerical value represents the sound resistivity of the sound absorption material;
Imto extract the imaginary function of the complex number, the value represents the acoustic reactance of the material.
The sound resistance rate and the sound absorption coefficient of each sound absorption layer are calculated through an empirical formula, and the efficiency is high.
In one embodiment, the sound absorption coefficient of each sound absorption layer is calculated by the following formula:
in the formula: alpha is sound absorption coefficient;
Reis the acoustic resistivity of the sound absorbing material;
Imis the acoustic reactance of the sound absorbing material.
The acoustic resistivity and the acoustic reactance of each sound absorption layer are measured by an impedance tube measuring method. The acoustic reactance rate and the sound absorption coefficient of each sound absorption layer of this embodiment combine the environmental measurement to obtain, make data more accurate.
In one example, referring to fig. 4, 5 and 6, the sound absorbing material # 1, the sound absorbing material # 2 and the sound absorbing material # 3 are selected; which are respectively a white felt, a bi-component cotton material and a grey felt with the thickness of 10 mm.
And respectively measuring the acoustic resistivity and the acoustic reactance of each sound absorption layer above the frequency of 2KHz by using an impedance tube measuring mode.
The specific test data is shown in fig. 5 and 6.
According to the formula
In the formula: alpha is sound absorption coefficient;
Reis the acoustic resistivity of the sound absorbing material;
Imis the acoustic reactance of the sound absorbing material.
Can be obtained when R iseMaximum trend to 1, I2 mWhen the minimum value of the coefficient is close to 0, the maximum value of the sound absorption coefficient alpha is close to 1, and the sound absorption performance is the best and the reflection performance is poor.
When R iseMinimum towards 0, I2 mWhen the sound absorption coefficient alpha is larger, the minimum sound absorption coefficient alpha tends to 0, the sound absorption performance is poor, the reflection performance is good, and the sound insulation effect is better.
R of sound-absorbing material # 2 according to the data of the sound resistivity and the sound reactance rate measured in FIGS. 5 and 6 and the above formulaeMaximum, I2 mThe minimum, the 2# sound absorption material is I in the 1# sound absorption material, the 2# sound absorption material and the 3# sound absorption material2 mThe sound absorption material with the minimum sound absorption coefficient alpha is the maximum sound absorption coefficient; has better sound absorption performance and minimum reflection performance. And 2# sound absorption material is arranged as a second sound absorption layer 12.
R of 1# Sound absorbenteAt an intermediate level, I2 mThe largest sound absorption material is I in the 1# sound absorption material, the 2# sound absorption material and the 3# sound absorption material2 mA largest sound absorbing layer; the sound-absorbing material No. 1 is set as the third sound-absorbing layer 13, which has better reflection performance.
Sound-absorbing material No. 3I2 mI positioned in 1# sound absorption material and 2# sound absorption material2 mIn between, set up 3# sound absorbing material as first sound absorbing layer 11.
The No. 3 sound absorption material is a first sound absorption layer 11 and is arranged on the inner layer; the No. 2 sound absorption material is a second sound absorption layer 12 and is arranged in the middle layer; the No. 1 sound absorption material is a third sound absorption layer 13 and is arranged on the outer layer; this scheme is the scheme to be protected by the present invention and is referred to as scheme 1.
Meanwhile, the schemes formed by other arrangement sequences are measured and are respectively scheme 2, scheme 3 and scheme 4, and the specific arrangement conditions are listed as the following table:
| scheme(s) | Inner layer | Middle layer | |
| Scheme | |||
| 1 | 3# Sound absorbing Material | 2# Sound absorbing Material | No. 1 sound absorption material |
| Scheme 2 | 2# Sound absorbing Material | 3# Sound absorbing Material | No. 1 sound absorption material |
| Scheme 3 | No. 1 sound absorption material | 2# Sound absorbing Material | 3# Sound absorbing Material |
| Scheme 4 | No. 1 sound absorption material | 3# Sound absorbing Material | 2# Sound absorbing Material |
Noise contrast test data is shown in figure 7.
Compared with other schemes, the scheme 1 has the advantages of sound absorption and sound insulation, and the noise value of the air conditioner outdoor unit is reduced by 3 dB.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An outdoor unit of an air conditioner is characterized by comprising a compressor and a compressor sound insulation cover;
the compressor sound-proof cover comprises:
the two sound absorption layers are respectively a first sound absorption layer and a second sound absorption layer which are extension layers made of different sound absorption materials; the first sound absorption layer and the second sound absorption layer are sequentially arranged from inside to outside to form a cavity for accommodating the compressor; the compressor is fixedly arranged in the containing cavity; the absolute value of the acoustic reactance of the second sound absorption layer is smaller than the absolute value of the acoustic reactance of the first sound absorption layer;
and the sound insulation layer is an extension layer made of sound insulation materials, is arranged on the outer side of the second sound absorption layer and is connected with the second sound absorption layer.
2. The outdoor unit of claim 1, wherein the sound absorption coefficient of the second sound absorption layer is greater than that of the first sound absorption layer.
3. An outdoor unit of an air conditioner is characterized by comprising a compressor and a compressor sound insulation cover;
the compressor sound-proof cover comprises:
at least three sound absorption layers which are extension layers made of different sound absorption materials respectively; the sound absorption layers are sequentially arranged from inside to outside to form a containing cavity for containing the compressor; the compressor is fixedly arranged in the containing cavity;
the absolute value of the sound resistance of the sound absorption layer positioned in the middle layer is the smallest of the absolute values of the sound resistance of the sound absorption layers; the absolute value of the sound resistance of the sound absorption layer positioned on the outer layer is the largest in the absolute values of the sound resistance of the sound absorption layers; the absolute value of the acoustic reactance of the sound absorption layer positioned on the inner layer is positioned between the absolute value of the acoustic reactance of the sound absorption layer positioned on the middle layer and the absolute value of the acoustic reactance of the sound absorption layer positioned on the outer layer.
4. The outdoor unit of claim 3, wherein three sound absorption layers are provided, namely, a first sound absorption layer, a second sound absorption layer and a third sound absorption layer, which are sequentially arranged from inside to outside to form a cavity for accommodating the compressor;
the absolute value of the acoustic reactance of the second sound absorption layer is the smallest of the absolute values of the acoustic reactance of the three sound absorption layers; the absolute value of the acoustic reactance of the third sound absorption layer is the largest of the absolute values of the acoustic reactance of the three sound absorption layers; the absolute value of the acoustic reactance of the first sound-absorbing layer is between the absolute value of the acoustic reactance of the second sound-absorbing layer and the absolute value of the acoustic reactance of the third sound-absorbing layer.
5. The outdoor unit of claim 4, wherein the sound absorption coefficient of the second sound absorption layer is the largest of the sound absorption coefficients of the sound absorption layers.
6. The outdoor unit of claim 5, wherein the compressor sound-insulating cover further comprises a sound-insulating layer which is an extended layer made of a sound-insulating material; the puigging set up in the outside of third sound-absorbing layer, with the third sound-absorbing layer is connected.
7. The outdoor unit of any one of claims 4 to 6, wherein the first, second and third sound-absorbing layers are made of grey felt, bi-component cotton and white felt, respectively.
8. The outdoor unit of claim 7, wherein the first sound absorption layer has a thickness ranging from 2mm to 30 mm; the thickness range of the second sound absorption layer is 2 mm-30 mm; the thickness range of the third sound absorption layer is 2mm ~30 mm.
9. The outdoor unit of claim 8, wherein the first sound-absorbing layer has a thickness of 10 mm; the thickness of the second sound absorption layer is 10 mm; the thickness of the third sound absorption layer is 10 mm.
10. The outdoor unit of any one of claims 4 to 6, wherein the sound insulation layer is made of a metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110014190.2A CN112815404B (en) | 2021-01-06 | 2021-01-06 | Outdoor unit of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110014190.2A CN112815404B (en) | 2021-01-06 | 2021-01-06 | Outdoor unit of air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112815404A true CN112815404A (en) | 2021-05-18 |
| CN112815404B CN112815404B (en) | 2022-07-01 |
Family
ID=75857956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110014190.2A Active CN112815404B (en) | 2021-01-06 | 2021-01-06 | Outdoor unit of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112815404B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203532189U (en) * | 2013-08-22 | 2014-04-09 | 广东美的制冷设备有限公司 | Low-noise variable frequency air conditioner compressor |
| CN109210757A (en) * | 2018-10-23 | 2019-01-15 | 珠海格力电器股份有限公司 | A kind of sound-proof material and compressor containing multiple-layer absorbers |
| CN111238019A (en) * | 2020-03-03 | 2020-06-05 | 青岛海信日立空调系统有限公司 | Refrigerating equipment |
| CN111577577A (en) * | 2020-04-26 | 2020-08-25 | 株洲时代新材料科技股份有限公司 | Sound insulation cover, design method of sound insulation cover and sound insulation method of compressor |
| CN111923508A (en) * | 2020-07-31 | 2020-11-13 | 珠海格力绿色再生资源有限公司 | Soundproof cotton, preparation method thereof and compressor |
-
2021
- 2021-01-06 CN CN202110014190.2A patent/CN112815404B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203532189U (en) * | 2013-08-22 | 2014-04-09 | 广东美的制冷设备有限公司 | Low-noise variable frequency air conditioner compressor |
| CN109210757A (en) * | 2018-10-23 | 2019-01-15 | 珠海格力电器股份有限公司 | A kind of sound-proof material and compressor containing multiple-layer absorbers |
| CN111238019A (en) * | 2020-03-03 | 2020-06-05 | 青岛海信日立空调系统有限公司 | Refrigerating equipment |
| CN111577577A (en) * | 2020-04-26 | 2020-08-25 | 株洲时代新材料科技股份有限公司 | Sound insulation cover, design method of sound insulation cover and sound insulation method of compressor |
| CN111923508A (en) * | 2020-07-31 | 2020-11-13 | 珠海格力绿色再生资源有限公司 | Soundproof cotton, preparation method thereof and compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112815404B (en) | 2022-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103321875B (en) | suction muffler for compressor | |
| CN106142768B (en) | A kind of installation method of sound-proof material, air-conditioner outdoor unit and sound-insulating structure | |
| CN112815404B (en) | Outdoor unit of air conditioner | |
| CN106765384A (en) | A kind of perforated microstructure low noise lampblack absorber | |
| JP4909832B2 (en) | Radio wave absorber and radio wave anechoic chamber using the same | |
| CN114495887A (en) | Weak coupling-based ventilation broadband sound absorption patch and use method thereof | |
| CN108487487A (en) | A kind of compound wedge absorber | |
| CN102384571A (en) | Silencing structure of air-conditioning compressor | |
| CN103485891B (en) | A kind of quickly-assembling type noise elimination sound-insulating cover for mobile diesel generator | |
| CN106194661A (en) | Sympathetic response cavate air suction silencer and refrigeration compressor | |
| CN110428800A (en) | A kind of pre- insulation impedance composite muffler | |
| CN206309548U (en) | Sympathetic response cavate air suction silencer and refrigeration compressor | |
| CN209959579U (en) | Non-independent integral fan silencer | |
| CN213960486U (en) | Mute cabinet | |
| CN208486395U (en) | A kind of compound wedge absorber | |
| CN205227745U (en) | Board -like structure of making an uproar of falling reaches air conditioning equipment including it | |
| CN209523881U (en) | A kind of rotor-type compressor sound absorber | |
| CN216644537U (en) | Noise reduction device and air conditioner module | |
| CN213904928U (en) | EPDM rubber and plastic noise reduction gasket | |
| CN211447932U (en) | Mute room for detecting air conditioner component | |
| CN214330844U (en) | Noise reduction device of air compressor | |
| CN205818582U (en) | A kind of Sound-proof material and air-conditioner outdoor unit | |
| CN214120230U (en) | Mute air conditioner outdoor unit | |
| CN217423629U (en) | Noise reduction device and gas water heater | |
| CN220931200U (en) | Fume exhaust fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |