CN215175536U - Outdoor unit of air conditioner - Google Patents

Abstract

The utility model relates to an air conditioning technology field discloses an air condensing units, and it includes: the casing comprises a front panel arranged on the front side; and one or more inhale the sound subassembly, inhale the sound subassembly and install on the trailing flank of front panel, inhale the sound subassembly and include the box body, the box body includes front bezel and back plate, it is formed with the cavity to inject between the preceding lateral wall of front bezel and back plate, the back lateral wall department that is close to the front bezel in the cavity is equipped with inhales the sound cotton, inhale to inject to be formed with the air cavity between sound cotton and the back plate, set up a plurality of micro-perforations that run through its front and back both sides on the back plate. The utility model has the advantages that: the sound absorption assembly is arranged on the front panel of the casing, the sound absorption assembly adopts an active noise reduction method combining a micro-perforated plate sound absorption structure and a sound absorption material, noise can be attenuated twice, the middle-low frequency part has certain sound absorption and sound insulation effects, the sound absorption effect is better, and therefore the running noise of the outdoor unit of the air conditioner is lower.

Description

Outdoor unit of air conditioner

Technical Field

The utility model relates to an air conditioning technology field especially relates to an air condensing units.

Background

At present, regarding noise reduction of an outdoor unit of refrigeration equipment such as an air conditioner and the like, a common means is to paste soundproof cotton or damping materials and the like on a panel of an outer casing, or paste soundproof cotton and other soundproof materials on the periphery of a compressor and a pipeline, and since the shape of the casing is irregular and the space is limited, a sound absorption board is rarely used for noise reduction of the outdoor unit of the air conditioner due to unmatched shape or inconvenient installation; however, noise generated by the outdoor unit of the air conditioner mainly consists of superimposed mixed noise such as fan BPF noise, mechanical noise, electromagnetic noise and the like, the noise spectrum distribution is wide, and the common means of attaching soundproof cotton only has a certain sound absorption effect on part of middle-frequency-band noise, and the noise reduction effect capability on low-frequency-band noise is very limited, so that the noise reduction effect is poor.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide an outdoor unit of an air conditioner, which can improve noise reduction effect.

The purpose of the application is realized by the following technical scheme:

an outdoor unit of an air conditioner, comprising:

a housing including a front panel disposed at a front side; and

one or more inhale the sound subassembly, inhale the sound subassembly install in on the trailing flank of front panel, it includes the box body to inhale the sound subassembly, the box body includes front bezel and back plate, the front bezel with the front bezel links to each other, the back lateral wall of front bezel reaches it is formed with the cavity to inject between the preceding lateral wall of back plate, be close to in the cavity the back lateral wall department of front bezel is equipped with inhales the sound cotton, inhale the sound cotton with inject between the back plate and be formed with the air cavity, set up a plurality of micro-perforations that run through its front and back both sides on the back plate.

In some embodiments of the present application, the cavity is closed at the periphery and the bottom, and is open at the top.

In some embodiments of the present application, the sound absorbing assembly further comprises:

the space bar, the trompil has been seted up on the space bar, the space bar is located in the cavity, and will the cavity is separated into the sound absorbing cavity that sets gradually after to in the past and is reached the air cavity, the sound absorbing layer is located the sound absorbing cavity.

In some embodiments of the present application, the aperture of the microperforations is d, and 0.1 mm ≦ d ≦ 0.3 mm.

In some embodiments of the present application, the rear panel has a perforation rate of p, p is 0.2% to 1%.

In some embodiments of the present application, the depth of the air cavity in the front-rear direction is D, and 20 mm ≦ D ≦ 50 mm.

In some embodiments of the present application, the thickness of the rear plate is t, and 0.1 mm ≦ t ≦ 1 mm.

In some embodiments of the present application, the thickness of the sound absorption layer is n, and 2 mm ≦ n ≦ 20 mm.

In some embodiments of the present application, the sound absorbing layer is an industrial cotton felt or an asphalt glass cotton felt.

In some embodiments of the present application, the front plate is attached to the front plate by magnetic attraction.

The utility model provides an air condensing units, it makes an uproar to fall through setting up the sound subassembly of inhaling on the front panel of casing, and inhale the sound subassembly and adopt the initiative noise reduction method that microperforated panel sound absorbing structure and sound absorbing material combined together, can carry out twice decay to the noise, the centering low frequency part has certain sound absorption sound insulation effect, compare in single subsides soundproof cotton or the parcel inhales the sound cotton felt of inhaling, the acoustic absorption coefficient improves by a wide margin, sound absorption effect is better, thereby make air condensing units's operating noise lower.

Drawings

The present application is described in further detail below in connection with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the described objects and may contain exaggerated displays and are not necessarily drawn to scale.

Fig. 1 is an exploded view of an embodiment of an outdoor unit of an air conditioner according to the present application;

fig. 2 is a schematic structural view of a sound-absorbing member of the outdoor unit of the air conditioner of the embodiment shown in fig. 1;

FIG. 3 is a schematic view of the sound absorbing assembly of FIG. 2, viewed from the front to the rear;

FIG. 4 is a schematic diagram of a prior art noise signal spectrum distribution of an outdoor unit of an air conditioner under a rated operating condition;

FIG. 5 is a graph of the effect of the sound absorbing assembly of FIG. 2 on the sound absorption coefficient of the sound absorbing structure of the microperforated panel as the pore size of the microperforations is varied;

FIG. 6 is a graph of the effect of the sound absorbing assembly of FIG. 2 on the sound absorption coefficient of the microperforated panel sound absorbing structure as the perforation rate of the rear panel is varied;

FIG. 7 is a graph showing the effect of the sound absorbing assembly of FIG. 2 on the sound absorption coefficient of the sound absorbing structure of the microperforated panel as the depth of the air cavity in the fore-aft direction changes;

fig. 8 is a graph showing the effect of the sound-absorbing assembly of fig. 2 on the sound absorption coefficient of the front panel when the thickness of the rear panel is changed.

In the figure, 100, a housing; 101. a front panel; 102. a fan housing;

200. a sound absorbing assembly; 1. a box body; 11. a front plate; 12. a back plate; 121. micro-perforation; 13. a cavity; 131. an air chamber; 132. a sound absorbing chamber; 3. a partition plate; 31. opening a hole; 4. and a magnet.

Detailed Description

Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.

First, it should be noted that the top, bottom, upward, downward, front, rear, and other directions mentioned herein are relative to the air conditioner outdoor unit during the specific use process, and they are relative concepts; specifically, in the use process of the air conditioner outdoor unit, after the air conditioner outdoor unit is installed close to a wall, one side close to the wall is the back, and the other side far away from the wall is the front.

It should be noted that the term "comprising" does not exclude other elements or steps and the "a" or "an" does not exclude a plurality.

Furthermore, it should be further noted that any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the figures, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application not directly mentioned herein.

It will be further understood that the terms "first," "second," and the like, are used herein to describe various information and should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present application.

It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.

Specifically, as shown in fig. 1 to 3, an embodiment of the present application provides an outdoor unit of an air conditioner, including: a cabinet 100 and a sound-absorbing member 200; casing 100 is including locating the front panel 101 of front side, be equipped with fan casing 102 on the front panel 101, inhale sound subassembly 200 and install on the trailing flank of front panel 101, be used for carrying out noise reduction treatment to the produced noise of air conditioning outdoor unit, inhale sound subassembly 200 and include box body 1, box body 1 includes front bezel 11 and back plate 12, front bezel 11 links to each other with front panel 101, it is formed with cavity 13 to inject between the back wall of front bezel 11 and the front sidewall of back plate 12, the back sidewall department that is close to front bezel 11 in cavity 13 is equipped with the sound absorption cotton (not shown in the drawing), it is formed with air cavity 131 to inject between sound absorption cotton and the back plate 12, set up a plurality of micro-perforated holes 121 that run through its front and back both sides on the back plate 12, also be about to establish back plate 12 as the micro-perforated plate.

Based on the technical scheme, the sound absorption assembly 200 is directly arranged on the front panel 101, and is simple and convenient to install; in the operation process of the air conditioning system, noise generated by the air conditioning outdoor unit is firstly attenuated for the first time through the rear plate 12, passes through the sound-absorbing cotton for secondary attenuation after passing through the air cavity 131, and has certain sound absorption and insulation effects on middle and low frequency parts after secondary attenuation, and the sound is attenuated and reflected in the process; the sound absorption assembly 200 in this embodiment adopts an active noise reduction method combining a micro-perforated panel sound absorption structure (a structure of a micro-perforated panel and an air cavity) and a sound absorption material, and compared with a single sound insulation cotton or a wrapped sound absorption cotton felt, the sound absorption coefficient can be greatly improved, the sound absorption effect is better, and therefore the running noise of the outdoor unit of the air conditioner is lower.

In addition, a plurality of sound absorption assemblies 200 can be arranged according to the size of the front panel 101 of the outdoor unit of the air conditioner, and are specifically arranged according to the actual space condition of the front panel 101, and the sound absorption assemblies 200 can be arranged side by side or at intervals, so that the sound absorption area can be increased, and the sound absorption effect can be improved.

Specifically, in order to be convenient for to inhale the sound cotton and install in box body 1, cavity 13 is all sealed, the open form in top all around and bottom, can install and change through the open-top and inhale the sound cotton.

Further, the sound-absorbing assembly 200 further comprises a partition plate 3 arranged in the cavity 13, the partition plate 3 divides the cavity 13 into a sound-absorbing cavity 132 and an air cavity 131 which are sequentially arranged from front to back, the sound-absorbing cotton can be cut according to the size of the sound-absorbing cavity 132 and directly inserted into the sound-absorbing cavity 132, the sound-absorbing cotton is convenient to replace, and the sound-absorbing cotton is kept fixed to avoid moving and falling off; and the partition plate 3 is opened with an opening 31 for passing noise.

In addition, as alternative embodiments, other mounting methods can be adopted to fix the sound-absorbing cotton in the box body 1, for example, the sound-absorbing cotton can be glued in the box body 1 or other connection methods can be adopted.

In addition, it is necessary to rationally select, through numerical calculations, design parameters relating to the performance of the sound-absorbing structure of a microperforated panel, which are mainly related to the parameters of the aperture D (#) of the microperforations 121 of the rear plate 12, the thickness t (#) of the rear plate 12, the perforation ratio p (%) of the rear plate 12, and the distance D (#) of the air chamber 131 in the front-rear direction.

The performance of the sound absorption structure of the micro-perforated plate is mainly measured through the sound absorption coefficient, and when the plane sound wave vertically enters, the sound absorption coefficient of the micro-perforated plate is as follows:

the relative impedance is:

the sound quality is as follows:

the microperforated plate constants were:

wherein, c is 340m/s, and f is the sound frequency.

By combining the analysis of the noise signal spectrogram of a common air conditioner outdoor unit and referring to fig. 4, a noise signal spectrum distribution diagram of an air conditioner outdoor unit in the prior art under a rated working condition is shown, energy of the noise signal spectrum distribution diagram is mainly concentrated in a frequency band interval of 100-1000 Hz, noise in the frequency band interval is most contributed to total sound pressure, when noise is reduced, the noise in the frequency band interval with the most contributed energy is generally reduced, and in order to increase margin, when a sound absorption structure of a micro-perforated plate is designed, a selected sound absorption frequency range is 40-1400 Hz.

Specifically, in order to study the influence of each design parameter of the sound absorption structure of the microperforated panel on the sound absorption coefficient thereof, the effect of the influence of the aperture D of the microperforation 121, the thickness t of the rear plate 12, the perforation rate p of the rear plate 12, and the depth D of the air cavity 131 in the front-rear direction on the sound absorption coefficient is discussed by a control variable method:

firstly, the influence of the aperture d of the micro-perforation 121 on the sound absorption coefficient is studied, specifically, the thickness of the rear plate 12 is 0.4 mm, the perforation rate of the rear plate 12 is 1%, the depth of the air cavity 131 in the front-back direction is 50 mm, the apertures of the micro-perforation 121 are respectively 0.1 mm, 0.3 mm and 0.6 mm, the sound frequency is 40-1400 Hz, and the relationship between the apertures of different micro-perforations 121, the frequency and the sound absorption coefficient is shown in fig. 5.

Next, the influence of the perforation rate p of the front plate 11 on the sound absorption coefficient thereof was examined, and the relation among the perforation rates, the frequencies and the sound absorption coefficients was similarly determined between 40 and 1400Hz, with the perforation rates of 0.2%, 1% and 2%, respectively, being maintained such that the thickness of the rear plate 12 was 0.4 mm, the diameter of the micro-perforations 121 was 0.3 mm, and the depth of the air cavity 131 in the front-rear direction was 50 mm, as shown in fig. 6.

Further studying the influence of the depth D of the air cavity 131 in the front-back direction on the sound absorption coefficient, selecting the thickness of the back plate 12 to be 0.4 mm, the aperture of the micro-perforation hole 121 to be 0.3 mm, and the perforation rate to be 1%, and respectively selecting the depths of the air cavity 131 in the front-back direction to be 10 mm, 20 mm and 50 mm, and similarly selecting the sound frequency to be 40-1400 Hz, wherein the relations between different perforation rates, frequencies and sound absorption coefficients are shown in fig. 7.

Finally, the influence of the thickness t of the rear plate 12 on the sound absorption coefficient is studied, the perforation rate is kept to be 1%, the aperture of the micro-perforation hole 121 is kept to be 0.3 mm, the depth of the air cavity 131 in the front-rear direction is kept to be 50 mm, the thicknesses of the rear plate 12 are respectively taken to be 0.1 mm, 0.5 mm and 1 mm, the sound frequency is also taken to be 40-1400 Hz, and the relationship among the thickness, the frequency and the sound absorption coefficient of the different front plates 11 is shown in fig. 8.

From the above test results, it is found that, when the other variables are fixed, the sound absorption coefficient is smaller as the aperture of the micro-perforated hole 121 is larger, and when the aperture of the micro-perforated hole 121 is larger than 0.3 mm, the sound absorption coefficient is small; when the pore diameter and the perforation rate of the micro-perforations 121 increase, the sound absorption effect on the low frequency part (below 200 Hz) becomes poor; the depth of the air cavity 131 in the front-back direction has a certain effect on the sound absorption coefficient of the low-frequency part, so that the air cavity 131 has a certain sound absorption effect on low-frequency noise, but when the depth of the air cavity 131 in the front-back direction is increased to a certain value, the absorption of sound in certain frequency bands is reduced along with the further increase of the depth of the air cavity 131 in the front-back direction; the thickness of the back plate 12 has relatively little effect on the sound absorption coefficient.

By combining the experimental results and the actual noise frequency of the outdoor unit of the air conditioner during operation, proper design parameters can be selected for the sound absorption structure of the micro-perforated plate:

specifically, the aperture of the micro-perforation hole 121 is 0.1 mm to 0.3 mm, such as 0.1 mm, 0.2 mm, 0.3 mm and the like; the perforation rate of the rear plate 12 is 0.2% -1%, and specifically 0.2%, 0.5% and 1%; in addition, the depth of the air cavity 131 in the front-rear direction is 20 mm to 50 mm, and specifically, may be selected from 10 mm, 30 mm, 35 mm, and 50 mm; the thickness of the rear panel 12 is 0.1 mm to 1 mm, and specifically, may be selected from 0.1 mm, 0.5 mm, and 1 mm.

In some embodiments of the present application, the thickness n of the sound absorption layer may be 2 mm to 20 mm, and specifically may be 2 mm, 5 mm, 10 mm, and 20 mm. In addition, the volume density of the sound-absorbing cotton is selected from 40-200 kg/m in consideration of the weight of the sound-absorbing assembly 200³The material of the sound-absorbing cotton can be industrial cotton felt or asphalt glass cotton felt.

In addition, as shown in fig. 3 in detail, the magnet 4 is installed on the front side surface of the front plate 11, and usually the front panel 101 is a metal plate capable of being matched and adsorbed with the magnet 4, and the sound-absorbing assembly 200 is directly adsorbed and fixed on the front panel 101 through the magnet 4 on the front plate 11, so that the installation and the disassembly are convenient, and the number of the sound-absorbing assemblies 200 can be conveniently selected according to actual conditions; illustratively, magnets 4 are mounted at four corners of the front side of the front plate 11.

To sum up, the outdoor unit of the air conditioner of the embodiment of the present application includes the sound-absorbing assembly 200 installed inside the front panel 101, the sound-absorbing assembly 200 includes a box body 1 with a cavity 13, sound-absorbing cotton is disposed in the cavity 13 near the front side, a rear plate 12 is disposed at the rear side of the box body 1, an air cavity 131 is disposed between the rear plate 12 and the sound-absorbing cotton, and the rear plate 12 is a micro-perforated plate; inhale the sound subassembly 200 direct mount in this embodiment inboard in the front panel 101 of organism 100, the installation is simple and convenient, and inhale the sound subassembly 200 and adopt the mode of making an initiative noise reduction that microperforated panel sound absorbing structure and sound absorbent combined together, for single subsides soundproof cotton or the parcel inhales the sound cotton felt of sound, the sound absorption coefficient can improve by a wide margin, and the sound absorption effect is better to make air condensing units's operating noise lower.

This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the application, including making and using any devices or systems, using suitable materials, and using any incorporated methods. The scope of the present application is defined by the claims and includes other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of the claims as long as they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims (10)

1. An outdoor unit of an air conditioner, comprising:

a housing including a front panel disposed at a front side; and

one or more inhale the sound subassembly, inhale the sound subassembly install in on the trailing flank of front panel, it includes the box body to inhale the sound subassembly, the box body includes front bezel and back plate, the front bezel with the front bezel links to each other, the back lateral wall of front bezel reaches it is formed with the cavity to inject between the preceding lateral wall of back plate, be close to in the cavity the back lateral wall department of front bezel is equipped with inhales the sound cotton, inhale the sound cotton with inject between the back plate and be formed with the air cavity, set up a plurality of micro-perforations that run through its front and back both sides on the back plate.

2. The outdoor unit of claim 1, wherein the cavity is closed at the periphery and the bottom and opened at the top.

3. The outdoor unit of claim 2, wherein the sound absorbing member further comprises:

the space bar, the trompil has been seted up on the space bar, the space bar is located in the cavity, and will the cavity is separated into the sound absorbing cavity that sets gradually after to in the past and is reached the air cavity, the sound absorbing layer is located the sound absorbing cavity.

4. The outdoor unit of an air conditioner according to any one of claims 1 to 3, wherein the diameter of the micro perforations is d, and 0.1 mm ≦ d ≦ 0.3 mm.

5. The outdoor unit of claim 4, wherein the rear plate has a perforation rate of p, p being 0.2% to 1%.

6. The outdoor unit of claim 4, wherein the depth of the air chamber in the front-rear direction is D, and 20 mm ≦ D ≦ 50 mm.

7. The outdoor unit of claim 4, wherein the rear plate has a thickness t, 0.1 mm ≦ t ≦ 1 mm.

8. The outdoor unit of claim 1, wherein the sound absorption layer has a thickness of n, 2 mm ≦ n ≦ 20 mm.

9. The outdoor unit of claim 1, wherein the sound absorption layer is an industrial cotton felt or an asphalt glass cotton felt.

10. The outdoor unit of claim 1, wherein the front panel is magnetically attached to the front panel.

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