JP2019100658A - Air conditioner outdoor unit - Google Patents

Abstract

To provide an air conditioner outdoor unit in which a low frequency component of noise generated in a compressor can be effectively reduced.SOLUTION: A sound absorbing material 81 is wound on a compressor 11 and an accumulator 12, a sound absorbing and insulating material 82 is disposed on an inner wall surface of a side panel 46, and an air layer 100 is provided between the sound absorbing material 81 and the sound absorbing and insulating material 82. The sound absorbing material 81 is composed of a low density material easily absorbing a high frequency component of noise, such as fiber and glass wool. On the other hand, the sound absorbing and insulating material 82 is composed of two sheets of the sound absorbing material 82a and of a sound insulating material 82b, and both of two sheets of the sound absorbing material 82a are composed of the material same as the sound absorbing material 81. The sound insulating material 82b is composed of a material with a density higher than that of the material forming the sound absorbing material 81 and the sound absorbing material 82a, such as vinyl chloride and a rubber material. The sound absorbing material 82a is adhered to a front surface and a back surface of the sound insulating material 82b to form the sound absorbing and insulating material 82.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an outdoor unit of an air conditioner, and in particular to noise reduction of a compressor.

  In the outdoor unit of the air conditioner, a compressor, a heat exchanger, a blower fan and the like are installed inside. Among these, the compressor generates a large amount of noise, and therefore, it is necessary to take soundproofing measures to reduce the generated noise. Usually, the compressor is stored in a machine room or a soundproof case provided inside the case of the outdoor unit. And as a soundproofing measure, while winding a sound absorbing material around a compressor, the method of arrange | positioning a sound absorbing material also to the machine wall in which a compressor is stored, and the inner wall face of a soundproof housing | casing is common.

  For example, in the outdoor unit of the air conditioner described in Patent Document 1, the compressor is disposed inside the soundproof housing made of sheet metal, and the sound absorbing material is wound around the compressor, and the sound absorbing material is also mounted on the inner wall surface of the soundproof housing. Is placed. As a result, the noise generated by the compressor is isolated by the soundproof housing and absorbed by the sound absorbing material, so the noise leaking to the outside of the housing of the outdoor unit is reduced. In general, low-density materials such as fibers and glass wool are often used as the sound absorbing material.

  In addition to the above-described sound absorbing material, there is also a method of using a sheet formed of a material having a higher density than the sound absorbing material, for example, vinyl chloride or a rubber material as the sound insulating material. For example, a combination of a sound absorbing material and a sound insulating material (hereinafter referred to as a sound absorbing and insulating material) is wound on a compressor and disposed on the inner wall of a machine room or a soundproof housing in which the compressor is stored. By using the sound absorbing and insulating material, the noise is isolated by the sound insulating material, and the noise that reaches the sound insulating material without being absorbed by the sound absorbing material is reflected by the sound insulating material and absorbed when passing through the sound absorbing material again. The noise can be reduced more than when the sound absorbing material is used alone.

JP, 2011-112323, A

  The above-mentioned sound absorbing material and sound absorbing and insulating material easily absorb high frequency components of noise (mainly noise with a frequency of 1 kHz or more) while absorbing low frequency components of noise (mainly noise with a frequency of 500 Hz or less) It has a sound absorption characteristic of being difficult. Therefore, the low frequency component of the noise which is not absorbed or isolated by the sound absorbing material or the sound absorbing and insulating material may leak to the outside of the casing of the outdoor unit. Further, the high frequency component of the noise is absorbed or isolated by the sound absorbing material or the sound absorbing and insulating material to reduce the noise level of the high frequency component, so the low frequency component of the noise becomes relatively noticeable. That is, the low frequency component of the noise can not be sufficiently reduced, which may cause discomfort to people.

  An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an outdoor unit of an air conditioner capable of effectively reducing the low frequency component of the noise generated by the compressor.

  In order to solve the above-described problems, in the outdoor unit of the air conditioner according to the present invention, a compressor, a first noise reduction member, and a second noise reduction member are disposed inside a housing, and the first noise reduction member is The second noise reduction member is formed of a sound absorbing material and disposed so as to surround the compressor, and the second noise reduction member is formed of a sound absorbing material and a sound insulating material and disposed on the inner wall surface of the housing. Then, an air layer is provided between the first noise reduction member and the second noise reduction member.

  The outdoor unit of the air conditioner according to the present invention configured as described above arranges the first noise reduction member and the second noise reduction member with the air layer separated, thereby reducing the low frequency component of the noise generated by the compressor. Can be effectively reduced.

It is the schematic of the outdoor unit in embodiment of this invention, (A) is an external appearance perspective view, (B) is the figure which looked at the inside of the outdoor unit from upper direction. It is drawing which shows the measurement result of the noise level of 500 Hz or less. It is the drawing which looked at the inside of the outdoor unit from the upper part in other embodiments of the present invention, (A) is a drawing showing a 2nd embodiment and (B) shows a 3rd embodiment, respectively.

  Hereinafter, embodiments of the present invention will be described in detail based on the attached drawings. As an embodiment, an outdoor unit provided with a blower outlet on the front surface of a housing and the inside of the housing is partitioned into a machine room and a heat exchanger room by a partition plate will be described as an example. The present invention is not limited to the following embodiments, and various modifications can be made without departing from the spirit of the present invention.

<Configuration of outdoor unit>
As shown in FIG. 1, the outdoor unit 1 has a top panel 41, a front panel 42, a front support 43, a rear support 44, a rear panel 45, a side panel 46, a bottom plate 47, and a partition. It has a rectangular parallelepiped-shaped casing 40 configured of a plate 48. In the following description, it is assumed that the X direction shown in FIG. 1 is the left and right direction of the outdoor unit 1, the Y direction is the front and rear direction of the outdoor unit 1, and the Z direction is the vertical direction of the outdoor unit 1.

  The top panel 41 is formed of a sheet metal and is disposed so as to cover the top surface of the housing 40. The periphery of the top panel 41 is bent downward, and the front panel 42, the front support 43, the back support 44, the back panel 45, the side panel The top end of each of the 46 is screwed on.

  The front panel 42 is formed of a sheet metal and is disposed to cover the front of the outdoor unit 1. At a portion of the front panel disposed on the front surface of the heat exchanger chamber 3 to be described later, an air outlet 61 communicating the inside and the outside of the housing 40 is provided. On the front surface of the blowout port 61, a fan guard 49 formed in a grid shape of iron material or resin material is disposed.

  The front side support column 43 is formed by bending a sheet metal into an L shape, and is disposed at the left end of the front surface of the outdoor unit 1. Further, the back side support 44 is formed by bending a sheet metal in an L-shape, and is disposed at the left end of the back of the outdoor unit 1. Further, the back panel 45 is formed of a sheet metal, and is disposed so as to cover a part of the back surface of the machine room 2 described later among the back surfaces of the outdoor unit 1. Then, as shown in FIG. 1 (B), the inside and the outside of the housing 40 are communicated between the front side support 43 and the back side support 44 and between the back side support 44 and the left end of the back panel 45. The suction port 62 is used.

  The side panel 46 is formed of a sheet metal and is disposed so as to cover the right side surface of the outdoor unit 1. The peripheral edge portion of the bottom plate 47 is bent upward, and the peripheral edge portion bent upward of the bottom plate 47 includes the front panel 42, the front side column 43, the rear side column 44, the rear panel 45, and the side panel 46. The lower end of the is screwed on.

  The partition plate 48 is formed by bending a sheet metal into a substantially U-shape, and the front end of the partition plate 48 is screwed to the front panel 42 and the lower end of the partition plate 48 is screwed to the bottom plate 47. As shown in FIG. 1B, the partition plate 48 partitions the inside of the housing 40 into the machine chamber 2 and the heat exchange chamber 3.

  In the machine room 2, a compressor 11 and an accumulator 12 are disposed, and the accumulator 12 is fixed to the compressor 11 by a metal fitting or the like. In the machine room 2, besides the compressor 11 and the accumulator 12, a four-way valve or expansion valve constituting a refrigerant circuit of the air conditioner, an electric component box for storing a control board or a power supply board, etc. However, illustration is omitted in FIG. 1 (B).

  In the heat exchange chamber 3, an L-shaped heat exchanger 13 is disposed to face the two suction ports 62. Further, in the heat exchange chamber 3, a blower fan whose central portion is fixed to a drive shaft of a fan motor (not shown) is disposed so as to face the blowout port 61.

  In the outdoor unit 1 described above, the compressor 11, the accumulator 12, the heat exchanger 13, and the four-way valve and expansion valve (not shown) are mutually connected by refrigerant piping (not shown). The refrigerant flowing through the heat exchanger 13 by the drive of the compressor 11 and the outside air flowing into the inside of the housing 40 from the two suction ports 62 by the rotation of the blower fan 14 and flowing into the heat exchanger 13 exchange heat. The heat is exchanged by the vessel 13, and the outside air heated or cooled by the refrigerant flows out from the inside of the housing 40 to the outside of the housing 40 via the blowout port 61.

<Sound absorbing material and sound absorbing and insulating material>
As described above, when the compressor 11 is driven to flow the refrigerant to the heat exchanger, the compressor 11 generates noise. In the outdoor unit 1 of the present embodiment, the noise generated by the compressor 11 is reduced by using the sound absorbing material 81 and the sound absorbing and insulating material 82 described below. The sound absorbing member 81 is a first noise reducing member of the present invention, and the sound absorbing and insulating member 82 is a second noise reducing member of the present invention.

  The sound absorbing material 81 is a low density material that easily absorbs the high frequency component of noise (mainly noise with a frequency of 1 kHz or more, hereinafter simply referred to as "high frequency component" except when necessary) such as fiber or glass wool. It is formed of The sound absorbing material 81 is formed in a plate shape, and its length can cover the side surfaces of the compressor 11 and the accumulator 12 when wound around the compressor 11 and the accumulator 12 as shown in FIG. 1 (B). It is assumed to be in size. The thickness dimension of the sound absorbing material 81 is, for example, 10 mm.

  The sound absorbing and insulating material 82 includes two sound absorbing materials 82a and one sound insulating material 82b, and is formed in a three-layer structure in which the sound absorbing materials 82a are attached to the front and back surfaces of the sound insulating material 82b. The two sound absorbing members 82 a are both formed of the same material as the sound absorbing member 81. Further, the sound insulation material 82b is formed of a material having a higher density than the material forming the sound absorption material 81 such as vinyl chloride or a rubber material or the sound absorption material 82a. The sound absorbing material 82 a and the sound insulating material 82 b are formed in a rectangular shape having the same vertical and horizontal dimensions except for the thickness dimension, and the vertical and horizontal dimensions may substantially cover the inner wall surface of the side panel 46. It is supposed to be able to The thickness of the two sound absorbing materials 82a is, for example, 3 mm, and the thickness of the sound insulating material 82b is, for example, 1 mm. In this case, the thickness dimension of the sound absorbing and insulating material 82 is 7 mm.

  As shown in FIG. 1B, the above-described sound absorbing material 81 is wound around the compressor 11 and the accumulator 12, and the sound absorbing and insulating material 82 is attached to the inner wall surface of the side panel 46. Further, when the sound absorbing material 81 and the sound absorbing and insulating material 82 are arranged as described above, the air layer 100 is formed between the sound absorbing material 81 and the sound absorbing and insulating material 82 without being in contact with each other. The arrangement of the compressor 11 and the accumulator 12 and the thickness dimensions of the sound absorbing material 81 and the sound absorbing and insulating material 82 are respectively determined.

  The reason for disposing the sound absorbing and insulating material 82 on the inner wall surface of the side panel 46 is as follows.

  The right side of the casing 40 of the outdoor unit 1 (outside of the side panel 46), the left side of the casing 40 (outside of the suction port 62 provided on the left side of the heat exchanger chamber 3), and the front side of the casing 40 ( The level of noise generated by the compressor 11 and leaking to the outside between the outside of the front panel 42) and the rear side of the housing 40 (outside of the back panel 45 and the suction port 62 provided on the back side) Are different. First, the distance from the compressor 11, which is a noise source, is the farthest, and the noise level leaking to the left side of the housing 40 between which the partition plate 48 and the heat exchanger 13 intervene is small compared to the other three directions. .

  Further, although only the front panel 42 is interposed between the compressor 11 and the front side of the housing 40 on the front side of the housing 40, noise generated by the driving of the blower fan 14 also leaks on the front side of the housing 40. The noise generated by the compressor 11 becomes inconspicuous. Further, on the rear side of the housing 40, the rear panel 45, the partition plate 48, and the heat exchanger 13 are disposed between the compressor 11 and the rear side of the housing 40. The leaking noise level is smaller than the front side of the housing 40.

  The right side of the case 40 is closer to the compressor 11 than the left side, the front side, and the rear side of the case 40 described above, and the side surface between the compressor 11 and the right side of the case 40 Only panel 46 is involved. Therefore, it is considered that the noise level leaking to the right of the housing 40 is large, and the possibility of discomfort to a person is high. In consideration of the above description, in the outdoor unit 1 of the present embodiment, the sound absorbing and insulating material 82 is attached only to the inner wall surface of the side panel 46, and other inner wall surfaces of the machine room 2 other than the inner wall surface of the side panel 46 Does not arrange the sound absorbing and insulating material 82.

<Effect of reducing low frequency components of noise by sound absorbing material and sound absorbing and insulating material>
Next, the reduction effect of the low frequency component of the noise generated by the compressor 11 obtained by the arrangement of the sound absorbing material 81 and the sound absorbing and insulating material 82 shown in FIG. 1B will be described with reference to FIG. As shown in FIG. 2, the frequency is up to 500 Hz for each frequency measured with a noise measurement microphone installed outside the housing 40 at a predetermined distance from the side panel 46 of the housing 40 of the outdoor unit 1. It is the measurement result of the total noise level (it describes as OA (OverAll Level) in FIG. 2) which is the sum total of a noise level and the noise level in each frequency.

  In FIG. 2, the vertical axis represents the noise level (unit: dB), and the horizontal axis represents 80 Hz of octave noise analysis of noise measured with a microphone for noise measurement (not shown) using a 1/3 octave band pass filter. It shows nine frequencies (unit: Hz) up to 500 Hz. That is, FIG. 2 shows the noise level at each frequency from 80 Hz to 500 Hz among the noise measured by the noise measurement microphone.

Further, in FIG. 2, the total noise level is described at the right end of the horizontal axis (right side of the line drawn parallel to the vertical axis on the right side of 500 Hz). The total noise level is a value calculated by substituting the noise level at each frequency from 80 Hz to 500 Hz into the following equation.

Total noise level = 10 log (10 ^{L1 / 10} +10 ^{L2 / 10} + ... +10 ^{L9 / 10} )
L1 to L9: noise level at each frequency from 80 Hz to 500 Hz

  Further, “this application” in FIG. 2 is a noise level for each frequency and the total noise level when the sound absorbing material 81 and the sound absorbing and insulating material 82 are arranged as shown in FIG. ing. On the other hand, “conventional” refers to the sound absorbing and insulating material configured of the same two sound absorbing materials 82 a and 82 b as the sound absorbing and insulating material 82 in place of the sound absorbing material 81 of FIG. The noise level per frequency and total noise level when wound around the accumulator 12 is represented by a solid bar graph.

  The measurement conditions when the noise measurement result of FIG. 2 is obtained are as follows. First, the position of the microphone for noise measurement is set at a position 25 cm away from the side panel 46 in the left-right direction, and at the center in the vertical direction and the front-rear direction. In addition, the rotational speed of the compressor 11 when measuring noise is 80 rps, the rotational speed of the blower fan 14 is 820 rpm, and the noise generated by the blower fan 14 from the noise detected by the microphone for noise measurement (the blower fan 14 in advance. The noise level of the compressor 11 is reduced by driving only and measuring).

  According to the measurement results shown in FIG. 2, the noise level of the “present application” is lower than that of the “conventional” at each of the frequencies of 80 Hz, 100 Hz, 160 Hz, 315 Hz, 400 Hz and 500 Hz. The difference is about 13 dB at a frequency of 315 Hz. On the other hand, although the noise level of "this application" becomes a value higher than a "conventional" noise level in each of a frequency of 125 Hz, 200 Hz, and 250 Hz, the difference is about 1 to 2 dB. The total noise level calculated using the above-mentioned formula is 51.2 dB for “conventional” and 45.1 dB for “this application”, and the total noise level for “this application” is 6 compared to the total noise level for “conventional” .1 dB lower.

  It is known that low-frequency components of noise can be reduced by providing a low-density sound-absorbing material as the sound-absorbing material 81 of the present embodiment to the noise source and providing an air layer outside the sound-absorbing material as seen from the noise source. (See, for example, “Study on the influence of the air layer behind on the sound absorption characteristics of a sound absorbing material” published on pages 177 to 180 of the Journal of the Acoustical Society of Japan, vol. 59, No. 2 (2003)). In the present embodiment, since the noise source is the compressor 11 and the sound absorbing and insulating material 82 and the side panel 46 are disposed outside the sound absorbing material 81 via the air layer 100, the low frequency component of the noise is reduced. It is considered to be

  Then, as shown in the measurement results of FIG. 2, the compressor 11 is more than the case in which both the one wound around the compressor 11 as in the “conventional” and the one disposed on the inner wall surface of the side panel 46 are all sound absorbing and insulating materials. It is found that the one with the sound absorbing material 81 wound around it and the one with the sound absorbing and insulating material 82 disposed on the inner wall surface of the side panel 46 has a greater effect of reducing the low frequency component of the noise when the air layer 100 is provided. The

  As described above, the outdoor unit 1 of the air conditioner according to the present embodiment winds the sound absorbing material 81 around the compressor 11 and the accumulator 12 and disposes the sound absorbing and insulating material 82 on the inner wall surface of the side panel 46 An air layer 100 was provided between the air absorbing member 81 and the sound absorbing and insulating material 82. As a result, the low frequency component of the noise generated by the compressor 11 is reduced, and the low frequency component of the noise leaking from the housing 40 of the outdoor unit 1 to the right is reduced, so that the discomfort given to people can be reduced.

  In addition, when the sound absorbing and insulating material 82 is disposed on the inner wall surface of the side panel 46, the sound absorbing and insulating material 82 vibrates and the inner wall surface of the side panel 46 because the sound absorbing material 82 a contacts the inner wall surface of the side panel 46. Even if it hits, the hit sound does not occur. In the present embodiment, the sound absorbing material 82a and the sound insulating material 82b have the same dimensions except for the thickness dimension, but the sound insulating material 82b is slightly smaller than the sound absorbing material 82a, for example It is also good. If the sound insulating material 82b is smaller than the sound absorbing material 82a, the upper and lower ends or the left and right ends of the sound absorbing and insulating material 82 contact the top panel 41, the bottom plate 46, and the front panel 42 of the housing 40. There is no hitting noise due to vibration.

  Next, a second embodiment of the present invention will be described with reference to FIG. The difference between this embodiment and the first embodiment is that the compressor in the partition plate 48 in addition to the sound absorbing material 81 wound around the compressor 11 and the accumulator 12 and the sound absorbing and insulating material 82 stuck on the inner wall surface of the side panel 46 The sound absorbing and insulating material 83 is also disposed at a position located on the rear side of the accumulator 11 and 11 (hereinafter referred to as the rear side of the partition plate 48). The sound absorbing and insulating material 82 and the sound absorbing and insulating material 83 are the second noise reduction members of the present invention.

  The sound absorbing and insulating material 83 has the same thickness dimensions and configuration as the sound absorbing and insulating material 82 except for the vertical dimension and the lateral dimension. That is, the sound absorbing and insulating material 83 is composed of two sound absorbing materials 83 a and one sound insulating material 83 b and is attached to the rear side of the partition plate 48. The sound absorbing and insulating material 83 is formed in a three-layer structure in which the sound absorbing material 83 a is attached to each of the front surface and the back surface of the sound insulating material 83 b. The two sound absorbing members 83 a are both formed of the same material as the sound absorbing member 81. Further, the sound insulation member 83b is formed of a material having a higher density than the material forming the sound absorption member 81 or the sound absorption member 83a such as vinyl chloride or a rubber material. The sound absorbing material 83a and the sound insulating material 83b are formed in a square shape having the same longitudinal dimension and lateral dimension except for the thickness dimension, and the longitudinal dimension and the lateral dimension can cover the rear side of the partition plate 48 It is assumed to be in size. The thickness of the two sound absorbing materials 83a is, for example, 3 mm, and the thickness of the sound insulating material 83b is, for example, 1 mm. In this case, the thickness dimension of the sound absorbing and insulating material 83 is 7 mm.

  As described in the first embodiment, the rear side of the housing 40 is unlikely to have a person, but the level of noise leaking to the rear side of the housing 40 is large. Therefore, in the present embodiment, the sound absorbing and insulating material 83 is disposed also on the inner wall surface (surface facing the machine room 2) on the rear side of the partition plate 48, and is formed between the sound absorbing material 81 and the sound absorbing and insulating material 82. Similar to the air layer 100, the arrangement of the compressor 11 and the accumulator 12 in the machine room 2, the sound absorbing material 81, and the sound absorption so that the air layer 200 is also formed between the sound absorption material 81 and the sound absorption and insulation material 83. The thickness dimensions of the material 82 and the sound absorbing and insulating material 83 are respectively determined. Thereby, the low frequency component of the noise leaking to the rear side of the housing 40 can also be reduced.

  Next, a third embodiment of the present invention will be described using FIG. 3 (B). The difference between the present embodiment and the first embodiment or the second embodiment is that the sound absorbing and insulating material is disposed only on the inner wall surface of the side panel 46 or the sound absorbing and insulating material is disposed on the inner wall surface of the side panel 46 and the partition plate Instead of being disposed on the rear side of 48, the sound absorbing and insulating material 84 is disposed so as to cover the entire inner wall surface of the machine room 2. The sound absorbing and insulating material 84 is the second noise reduction member of the present invention.

  The sound absorbing and insulating material 84 is the same as the thickness dimension and the structure except that the vertical dimension and the lateral dimension are different from those of the sound absorbing and insulating material 82 and the noise absorbing and insulating material 83. That is, the sound absorbing and insulating material 84 is composed of two sound absorbing materials 84 a and one sound insulating material 84 b, and the air layer 300 is interposed between the sound absorbing material 81 and the entire inner wall surface of the machine room 2. It is arranged to be. The sound absorbing and insulating material 84 is formed in a three-layer structure in which the sound absorbing material 84 a is attached to each of the front surface and the back surface of the sound insulating material 84 b. The two sound absorbing materials 84 a are both formed of the same material as the sound absorbing material 81. Further, the sound insulation member 84b is formed of a material having a higher density than the material forming the sound absorption material 81 and the sound absorption material 84a such as vinyl chloride and a rubber material. The sound absorbing material 84 a and the sound insulating material 84 b are formed in a square shape having the same longitudinal dimension and lateral dimension except for the thickness dimension, and the longitudinal dimension and the lateral dimension may cover all the inner wall surface of the machine room 2 It is supposed to be able to The thickness of the two sound absorbing members 84a is, for example, 3 mm, and the thickness of the sound insulating member 84b is, for example, 1 mm. In this case, the thickness dimension of the sound absorbing and insulating material 84 is 7 mm.

  As described above, the sound absorbing and insulating material 84 is disposed so as to cover the entire inner wall surface of the machine chamber 2, and the arrangement of the compressor 11 and the accumulator 12 in the machine chamber 2 so that the air layer 300 is formed The thickness dimensions of the sound absorbing material 81 and the sound absorbing and insulating material 84 are respectively determined. As a result, low frequency components of the noise of the compressor 11 leaking from the housing 40 can be reduced in each of the front, rear, right, and left directions of the housing 40, and the outdoor unit 1 with higher quietness can be obtained. Can be realized.

  In each of the embodiments described above, the sound absorbing and insulating materials 82 to 84 are all described as having a three-layer structure in which the sound insulating material is sandwiched between two sound absorbing materials. However, the present invention is not limited to this, and may be a sound absorbing and insulating material having a two-layer structure in which one sound absorbing material and one sound insulating material are laminated. However, in the case of a two-layer sound absorbing and insulating material, in order from the compressor 11 to the inner wall surface of the housing 40 in order of sound absorbing material and sound insulating material, in order to effectively absorb or isolate high frequency components of noise. Place the sound absorbing and insulating material so that When a two-layer sound absorbing and insulating material is provided, the sound absorbing effect of the high frequency component of the noise is reduced by an amount corresponding to the reduction of the sound absorbing material as compared with the three layer structured sound absorbing and insulating material. is there.

  Further, in each of the embodiments described above, the sound absorbing material 81 is described as being wound around the compressor 11 and the accumulator 12. However, when the outdoor unit 1 does not have the accumulator 12, the sound absorbing material 81 may be wound only on the compressor 11.

DESCRIPTION OF SYMBOLS 1 outdoor unit 2 machine room 11 compressor 12 accumulator 13 heat exchanger 14 ventilation fan 42 front panel 45 back panel 46 side panel 81 sound absorption material 82 sound absorption material 82a sound absorption material 82b sound insulation material 83 sound absorption material 83a sound absorption material 83b sound insulation material 84 sound absorbing material 84a sound absorbing material 84b sound insulating material 100, 200, 300 air space

Claims (2)

A compressor, a first noise reduction member, and a second noise reduction member are disposed inside the housing;
The first noise reduction member is formed of a sound absorbing material and disposed to surround the compressor.
The second noise reduction member is formed of a sound absorbing material and a sound insulating material and disposed on an inner wall surface of the housing.
Providing an air layer between the first noise reduction member and the second noise reduction member;
An outdoor unit of an air conditioner characterized in that. The second noise reduction member is formed to be disposed in the order of a sound absorbing material and a sound insulating material from the compressor toward the inner wall surface of the housing.
The outdoor unit of an air conditioner according to claim 1, characterized in that:

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