KR102377146B1 - Sound absorbing device for outdoor unit - Google Patents

Abstract

An invention for a sound absorbing device for an outdoor unit is disclosed. The sound absorbing device for an outdoor unit of the present invention is located between a heat exchange unit in which a blower fan and a heat exchanger are installed, and a machine room in which a compressor is installed, and is connected to a barrier unit dividing the heat exchange unit and the machine room and the barrier unit, and the heat exchange The inlet hole is installed toward at least one of the unit and the machine room part, it has an inner space connected to the inlet hole and may include a sound absorbing part for reducing noise.

Description

Sound absorbing device for outdoor unit {SOUND ABSORBING DEVICE FOR OUTDOOR UNIT}

The present invention relates to a sound absorbing device for an outdoor unit, and more particularly, to a sound absorbing device for an outdoor unit having a plurality of target frequencies for sound absorbing.

In general, an air conditioner (air-conditioner) is equipped with a refrigeration cycle device including a compressor, an outdoor heat exchanger, a capillary tube, a heat exchanger, and the like. The air conditioner can be divided into a window air conditioner in which a refrigeration cycle device is mounted in one body and installed on a window, and a separate air conditioner in which an indoor unit and an outdoor unit are separated and installed indoors and outdoors, respectively. The outdoor unit of the separate air conditioner includes a compressor that generates a lot of noise, an outdoor heat exchanger, and a cooling fan.

A compressor is installed on one side of the outdoor unit of the air conditioner to pressurize the refrigerant gas to a high temperature and high pressure state. In addition, an outdoor heat exchanger is installed on the other side of the outdoor unit of the air conditioner to discharge heat of the refrigerant discharged from the compressor to the outside to condense the high temperature and high pressure refrigerant into a liquid phase at room temperature and high pressure.

In addition, an outdoor fan is installed on the side of the outdoor heat exchanger to dissipate heat of the refrigerant discharged from the outdoor heat exchanger while rotating through a motor drive. A barrier is installed between the compressor and the blowing fan to partition the mechanical part in which the compressor is installed and the heat exchange part in which the blowing fan and the outdoor heat exchanger are installed.

Conventionally, there is a problem in that a separate device for absorbing noise generated by a compressor and a blower fan of the outdoor unit is not provided, so that the noise of the outdoor unit is increased. In addition, since the operating frequency of the compressor of the inverter air conditioner is variable, there is a problem in that the frequency causing noise is increased in plurality. Therefore, there is a need to improve it.

Background art of the present invention is disclosed in Korean Patent Application Laid-Open No. 2005-0071936 (published on June 16, 2006, title of the invention: barrier structure of an outdoor unit of an air conditioner).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sound absorbing device for an outdoor unit capable of reducing noise generated from an outdoor unit.

Another object of the present invention is to provide a sound absorbing device for an outdoor unit having a plurality of target frequencies for sound absorbing.

Another object of the present invention is to provide a sound absorbing device for an outdoor unit capable of reducing operating noise by installing a Helmholtz resonator using a resonance phenomenon of sound waves in an outdoor unit.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the appended claims.

The sound absorbing device for an outdoor unit according to the present invention for solving the above problems is a barrier part that passes between a heat exchange part and a machine room part, and a sound absorbing part for reducing noise by resonance phenomenon is installed in the barrier part to absorb sound. do it with

Specifically, since the sound absorbing parts provided with a plurality of target frequencies for reducing noise are installed on both sides of the barrier part, it is possible to reduce the plurality of frequencies generated by the outdoor unit.

In addition, the sound absorbing device for an outdoor unit according to the present invention may include a barrier part positioned between the heat exchange part in which the blowing fan and the heat exchanger are installed and the machine room part in which the compressor is installed, and dividing the heat exchange part and the machine room part.

And the present invention may further include a sound absorbing part connected to the barrier part, the inlet hole being installed toward at least one of the heat exchange part and the machine room part, having an inner space part connected to the inlet hole, and reducing noise.

In addition, the barrier unit may include a first barrier installed between the blower fan and the compressor in a standing state and a second barrier installed between the heat exchanger and the compressor in a standing state.

In addition, the sound absorbing part is located below the barrier part, and is located above the first noise reducing part and the first noise reducing part for absorbing the noise of the target frequency in the first target section, and the target in the second target section. It may include a second noise reduction unit for absorbing the noise of the frequency.

Also, the target frequency of the first target section may be set to be greater than the target frequency of the second target section.

In addition, the first noise reduction part is connected to the barrier part, and is connected to the lower body part and the lower body part having a lower inner space part inside, and on the side of the lower body part facing the heat exchange part or the machine room part. It may include a lower entrance hole forming a hole.

In addition, the first noise reduction unit may set a plurality of target frequencies by adjusting at least one of a volume of the lower inner space and a cross-sectional area of the lower entrance hole.

In addition, the second noise reduction part is connected to the barrier part, and is connected to the upper body part and the upper body part having an upper inner space part inside, and on the side of the upper body part facing the heat exchange part or the machine room part. It may include an upper inlet hole forming a hole.

In addition, the second noise reduction unit may set a plurality of target frequencies by adjusting at least one of the volume of the upper inner space and the cross-sectional area of the upper entrance hole.

In addition, the sound absorbing part is located on the first side of the barrier part facing the machine room part, and on the second side of the first sound absorbing part for reducing the noise generated by the heat exchange part and the barrier part facing the machine room part It may include a second sound absorbing portion for reducing the noise generated in the machine room portion.

In addition, the first sound absorbing part is connected to the first body part and the first internal space part located on the first side and having a first inner space part inside, and a hole in the first body part facing the heat exchange part It may include a first entrance hole forming a.

In addition, the first sound absorbing unit may set a plurality of target frequencies by adjusting at least one of a volume of the first inner space and a cross-sectional area of the first inlet hole.

In addition, the first sound absorbing unit may include a first resonator having the first body portion and the first inlet hole, and a plurality of the first resonators having different target frequencies may be provided.

In addition, it is possible to form a plurality of sound-absorbing modules according to the arrangement position of the first resonator.

In addition, the second sound absorbing part is located on the second side and connected to the second body part and the second internal space part having a second inner space part on the inside, and a hole is formed in the second body part facing the machine chamber part. It may include a second entrance hole to form.

In addition, the second sound absorbing unit may set a plurality of target frequencies by adjusting at least one of a volume of the second inner space and a cross-sectional area of the second inlet hole.

In addition, the second sound absorbing unit may include a second resonator having the second body portion and the second inlet hole, and a plurality of second resonators having different target frequencies may be provided.

In addition, it is possible to form a plurality of sound-absorbing modules according to the arrangement position of the second resonator.

In addition, the barrier part and the sound-absorbing part may be integrally injection-molded.

Since the sound absorbing device for an outdoor unit according to the present invention reduces noise generated from the outdoor unit by the sound absorbing unit using the resonance phenomenon of sound waves, it is possible to improve customer satisfaction.

In addition, according to the present invention, since it is possible to absorb noise of various frequencies generated in the outdoor unit by the sound-absorbing unit having a plurality of target frequencies for sound absorption, the operation noise of the outdoor unit can be reduced.

In addition, in the present invention, by installing a Helmholtz resonator using the resonance phenomenon of sound waves in the outdoor unit, it is possible to effectively absorb the noise in the low-frequency region generated at the upper part of the outdoor unit and the noise in the high-frequency region generated in the lower part of the outdoor unit, so the operating noise of the outdoor unit can be reduced. there is.

In addition, since the present invention does not need to additionally attach a sound absorbing material for noise reduction, it is possible to reduce material costs and production costs.

In addition, in the present invention, since the sound-absorbing part and the barrier part can be integrally injection-molded, material costs and production costs can be reduced.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 is a perspective view illustrating a state in which a sound absorbing device for an outdoor unit is installed in an outdoor unit according to an embodiment of the present invention.
2 is a perspective view illustrating a sound absorbing device for an outdoor unit according to an embodiment of the present invention.
3 is a cross-sectional view schematically showing a sound absorbing part according to an embodiment of the present invention.
4 is a cross-sectional view illustrating a first noise reduction unit according to an embodiment of the present invention.
5 is a cross-sectional view illustrating a second noise reduction unit according to an embodiment of the present invention.
6 is a cross-sectional view showing a sound absorbing part according to another embodiment of the present invention.
7 is a cross-sectional view illustrating a state in which the first resonators having different frequencies are installed in the first sound absorbing unit according to another embodiment of the present invention.
8 is a view illustrating a state in which noise is reduced by the first sound absorbing unit according to another embodiment of the present invention.
9 is a view showing a state in which a plurality of first resonators are arranged in a first combination according to another embodiment of the present invention.
10 is a view showing a state in which a plurality of first resonators are arranged in a second combination according to another embodiment of the present invention.
11 is a view showing a state in which a plurality of first resonators are arranged in a third combination according to another embodiment of the present invention.
12 is a view showing a state in which a plurality of first resonators are arranged in a fourth combination according to another embodiment of the present invention.

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from other components, and unless otherwise stated, it goes without saying that the first component may be the second component.

In the following, that an arbitrary component is disposed on the "upper (or lower)" of a component or "upper (or below)" of a component means that any component is disposed in contact with the upper surface (or lower surface) of the component. Furthermore, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

In addition, when it is described that a component is “connected”, “coupled” or “connected” to another component, the components may be directly connected or connected to each other, but other components are “interposed” between each component. It should be understood that “or, each component may be “connected,” “coupled,” or “connected,” through another component.

Throughout the specification, unless otherwise stated, each element may be singular or plural.

As used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various components or various steps described in the specification, some of which components or some steps are It should be construed that it may not include, or may further include additional components or steps.

Throughout the specification, when “A and/or B” is used, it means A, B or A and B, unless otherwise stated, and when “C to D” is used, it means that there is no specific opposite description. Unless otherwise specified, it means that it is greater than or equal to C and less than or equal to D.

Hereinafter, a sound absorbing device for an outdoor unit according to some embodiments of the present invention will be described.

1 is a perspective view illustrating a state in which a sound absorbing device 1 for an outdoor unit is installed on an outdoor unit 10 according to an embodiment of the present invention, and FIG. 2 is a sound absorbing device for an outdoor unit 1 according to an embodiment of the present invention. is a perspective view showing

1 and 2 , the sound absorbing device 1 for an outdoor unit according to an embodiment of the present invention includes a barrier part 50 and a sound absorbing part 60 . In the sound absorbing device 1 for an outdoor unit according to the present invention, a sound absorbing part 60 to which a Helmholtz resonator is applied is installed in the barrier part 50 dividing the heat exchange part 20 and the machine room part 30 .

In the present invention, a sound absorbing part 60 to which a Helmholtz resonator is applied is installed in the barrier part 50 dividing the heat exchange part 20 and the machine room part 30 . A plurality of resonators having different target frequencies may be installed in the sound absorbing unit 60 , and since these resonators are installed in combination, various noises generated inside the outdoor unit 10 may be effectively reduced.

The sound absorbing device 1 for an outdoor unit according to the present invention is provided with a plurality of resonators having different target frequencies, and since a combination arranged for each target frequency can be varied, a wider sound absorption compared to a sound absorbing device having one or two target frequencies can have bands.

The outdoor unit 10 of the air conditioner includes a heat exchange unit 20 , a machine room unit 30 , and a case unit 40 . A blower fan 22 and a heat exchanger 24 are installed in the heat exchange unit 20 . The refrigerant passing through the heat exchanger 24 exchanges heat with air outside the heat exchanger 24 . And the blowing fan 22 installed at a position facing the heat exchanger 24 induces the flow of air passing through the heat exchanger 24 . The heat exchanger 24 is installed in an upright state. Meanwhile, a compressor 32 is installed in the machine room 30 .

Since the configuration in which the blowing fan 22 , the heat exchanger 24 , and the compressor 32 are installed in the outdoor unit 10 is a known configuration, a detailed operation description thereof will be omitted.

The case part 40 forming the outside of the outdoor unit 10 supports the heat exchanger 24 and the lower parts of the compressor 32 , and includes a lower case 42 forming a bottom surface of the outdoor unit 10 , and a lower case 42 . ) extending upward and may include a side case 44 surrounding the outside of the heat exchange unit 20 and the machine room unit 30 .

The barrier part 50 is positioned between the heat exchange part 20 and the machine room part 30 , and various modifications are possible within the technical idea of dividing the heat exchange part 20 and the machine room part 30 . The barrier part 50 may be a partition wall installed in an erect shape between the heat exchange part 20 and the machine room part 30 .

The barrier unit 50 according to an embodiment of the present invention may include a first barrier 51 and a second barrier 52 . The first barrier 51 is installed in a standing state between the blower fan 22 and the compressor 32 , and the second barrier 52 is installed in a standing state between the heat exchanger 24 and the compressor 32 . can be

The barrier part 50 may be a bulkhead that is bent in a "L" shape and is erected, and divides the space between the heat exchange part 20 and the machine room part 30, so that noise generated from the heat exchange part 20 and the machine room part 30 are reduced. ) can be reduced respectively.

The sound absorbing part 60 is connected to the barrier part 50, and various modifications are possible within the technical idea that the inlet hole 62 is installed toward at least one of the heat exchange part 20 and the machine room part 30. In addition, the sound absorbing part 60 is provided with an inner space part 65 connected to the inlet hole 62, it is possible to reduce the noise.

3 is a cross-sectional view schematically showing the sound absorbing part 60 according to an embodiment of the present invention.

A noise reduction principle of the sound absorption unit 60 according to an embodiment of the present invention will be described with reference to FIG. 3 . An inlet hole 62 is formed in the sound-absorbing body having the inner space 65 therein. The inlet hole 62 communicates with the inner space portion 65 . And set the length between the outside of the sound-absorbing body and the inside of the sound-absorbing body as the entrance length.

This sound absorbing part 60 is made of sound absorption by the principle of the Helmholtz resonator (Helmholtz resonator). Air located inside the inlet hole 62 acts as a mass, and the air in the inner space 65 acts as a spring to cause resonance. By the resonance action of the sound-absorbing part 60, the air in the inlet hole 62 moves to the inside and outside of the sound-absorbing body, and friction with the inner wall of the sound-absorbing body facing the inlet hole 62, the sound energy is converted to thermal energy change and absorption takes place.

The resonant frequency of the sound absorbing part 60 is defined by Equation (1) below.

Equation (1):

f: resonant frequency

v: speed of sound

A: cross-sectional area of the inlet hole 62

V: the volume of the inner space (65)

L: entrance length

Therefore, when changing the resonance frequency of the sound absorbing portion 60, at least one of the cross-sectional area of the inlet hole 62 and the volume of the inner space portion 65 can be changed.

As shown in FIGS. 1 and 2 , the sound absorbing device 1 for an outdoor unit according to the present invention includes a Helmholtz resonator having a plurality of resonant frequencies while having the shape of a barrier formed in the existing outdoor unit 10 . It can be installed on either side of the barrier. Accordingly, the sound absorbing device 1 for an outdoor unit according to the present invention has a wider sound absorption band compared to a sound absorbing device having a single resonance frequency for sound absorption, and noise generated inside the outdoor unit 10 can be reduced.

The sound absorbing part 60 according to the present invention may be integrally installed on the barrier part 50 , and may be produced as a member separate from the barrier part 50 and fixed to the barrier part 50 . In addition, in the present invention, it is possible to simultaneously mold the sound-absorbing part 60 by using an inexpensive material such as plastic rather than the existing metal barrier part 50 . Accordingly, the sound absorption unit 60 may be formed of a combination of a plurality of resonators having sound absorption performance suitable for a problem frequency band occurring inside the outdoor unit 10 , and such a combination of resonators may be configured in the form of a plurality of modules.

The sound absorbing device 1 for an outdoor unit according to an embodiment of the present invention has a shape similar to that of a barrier installed inside the conventional outdoor unit 10, and has a Helmholtz resonator-shaped sound absorbing part ( 60) is installed. In addition, since the sound absorbing unit 60 is formed in a plurality of combinations with different target frequencies, it is possible to reduce noise in various frequency bands generated inside the outdoor unit 10 by forming a wider sound absorbing area than the resonator having one target frequency. .

The sound-absorbing part 60 according to an embodiment of the present invention is injection-molded integrally with the barrier part 50, and a first noise reduction part 70 for high-frequency sound absorption and a second noise reduction part for low-frequency sound absorption ( 90) may be included.

4 is a cross-sectional view showing the first noise reduction unit 70 according to an embodiment of the present invention.

2 and 4, the first noise reduction unit 70 is located below the barrier unit 50, and various modifications are made within the technical idea of absorbing the noise of the target frequency in the first target section. possible. The first noise reduction unit 70 according to an embodiment of the present invention may include a plurality of lower sound absorption units 80 having different frequencies.

The lower sound absorbing part 80 absorbs sound by the Helmholtz resonator principle, and a target frequency for sound absorption is divided into a plurality.

The lower sound absorbing part 80 according to an embodiment of the present invention may include a lower entrance hole 81 , a lower inner space part 82 , and a lower body part 83 .

The lower body part 83 is connected to the side surface of the barrier part 50, and various modifications are possible within the technical idea in which the lower inner space part 82 is provided inside. The lower body 83 may be formed in a hexahedral shape, and may be formed in various shapes such as a sphere, an ellipse, a triangular pyramid, a cylinder, and the like, if necessary.

In addition, the lower body part 83 may be installed on the lower side of the barrier part 50 facing the compressor 32 . The lower body part 83 is connected to each other in succession, and the barrier part 50 may be installed along the circumference of the lower body part 83 .

The lower inlet hole 81 is connected to the lower body 83, and various modifications are carried out within the technical idea of forming a hole in the side of the lower body 83 facing the heat exchange unit 20 or the machine chamber 30. is possible The lower inlet hole 81 according to an embodiment of the present invention may alternately form a hole in the heat exchange unit 20 and the machine room unit 30 .

The thickness of the lower body portion 83 in which the lower inlet hole 81 is formed is set to the lower inlet length L1. The first noise reduction unit 70 according to an embodiment of the present invention may set a plurality of target frequencies by adjusting at least one of the volume of the lower inner space 82 and the cross-sectional area of the lower entrance hole 81 . there is. For example, a plurality of lower sound absorbing units 80 having different target frequencies may be installed in the first noise reduction unit 70 . And the lower sound absorbing part 80 may be set to have a target frequency for sound absorption by adjusting the cross-sectional area of the lower entrance hole 81 and the volume of the lower inner space 82 .

The lower sound absorbing part 80 may be sequentially installed in a horizontal direction, and the lower inlet hole 81 may be alternately installed in a direction toward the heat exchange unit 20 and in a direction toward the machine chamber 30 . Accordingly, noise generated from the heat exchange unit 20 and the machine room unit 30 can be reduced, respectively.

5 is a cross-sectional view illustrating the second noise reduction unit 90 according to an embodiment of the present invention.

2 and 5, the second noise reduction unit 90 is located above the first noise reduction unit 70, and within the technical idea of absorbing the noise of the target frequency in the second target section. Various modifications are possible. In the second noise reduction unit 90 according to an embodiment of the present invention, a plurality of upper sound absorbing units 100 having different target frequencies may be installed.

The upper sound absorbing part 100 according to an embodiment of the present invention may include an upper entrance hole 101 , an upper inner space part 102 , and an upper body part 103 .

The upper body part 103 is connected to the side surface of the barrier part 50, and various modifications are possible within the technical idea in which the upper inner space part 102 is provided inside. The upper body 103 may be formed in a hexahedral shape like the lower body 83, and if necessary, various modifications such as a sphere, an ellipse, a triangular pyramid, a cylinder, etc. may be deformed into various shapes.

In addition, the upper body part 103 may be installed in the barrier part 50 located above the lower body part 83 . The upper body part 103 is also connected to each other like the lower body part 83 , and the barrier part 50 may be installed along the circumference of the lower body part 83 .

The upper inlet hole 101 is connected to the upper body portion 103, and various modifications are carried out within the technical idea of forming a hole in the side of the upper body portion 103 facing the heat exchange portion 20 or the machine room portion 30. is possible The upper inlet hole 101 according to an embodiment of the present invention may alternately form a hole in the heat exchange unit 20 and the machine room unit 30 .

The thickness of the upper body portion 103 in which the upper inlet hole 101 is formed is set to the lower inlet length L1. The second noise reduction unit 90 according to an embodiment of the present invention may set a plurality of target frequencies by adjusting at least one of the volume of the upper inner space 102 and the cross-sectional area of the upper entrance hole 101 . there is. For example, a plurality of upper sound absorbing units 100 having different target frequencies may be installed in the second noise reduction unit 90 . And the upper sound absorbing part 100 may be set to have a target frequency for sound absorption by adjusting the cross-sectional area of the upper entrance hole 101 and the volume of the upper inner space part 102 .

The upper sound absorbing part 100 may be installed one after another in a horizontal direction, and the upper inlet hole 101 may be alternately installed in a direction toward the heat exchange unit 20 and a direction toward the machine room unit 30 . Accordingly, noise generated from the heat exchange unit 20 and the machine room unit 30 can be reduced, respectively.

Meanwhile, a plurality of target frequencies for sound absorption are set in the first noise reduction unit 70 , and the plurality of target frequencies belong to the first target section. In addition, a plurality of target frequencies for sound absorption are also set in the second noise reduction unit 90 , and the plurality of target frequencies belong to the second target section. In addition, the target frequency of the first target section may be set to be greater than the target frequency of the second target section.

Accordingly, the second noise reducing unit 90 installed on the upper side of the barrier unit 50 has a larger internal volume compared to the first noise reducing unit 70 to absorb noise in the low frequency region. In addition, the first noise reducing unit 70 installed on the lower side of the barrier unit 50 has a smaller internal volume compared to the second noise reducing unit 90 so as to absorb noise in a high frequency region.

According to the above structure, the sound absorbing device 1 for an outdoor unit according to an embodiment of the present invention has a wider sound absorbing band than when one or two resonators are formed, and various noises generated by the variable outdoor unit 10 can be effectively reduced. In addition, unlike the conventional one, there is no need to attach a sound absorbing material for additional noise reduction to the outdoor unit 10 in which the sound absorbing device 1 for the outdoor unit according to the present invention is installed, so that material and production costs can be reduced.

In the present invention, the sound absorbing part 60 is formed using a Helmholtz resonator using the resonance phenomenon of sound waves, and the sound absorbing part 60 is connected to the barrier part 50 . Therefore, the sound absorbing device 1 for an outdoor unit according to the present invention can not only remove a plurality of specific frequencies that generate noise, but also can vary the target frequency for sound absorption by arranging the resonators in a plurality of regular patterns. . Therefore, compared to a sound absorbing device having one target frequency for sound absorption, the sound absorbing device 1 for an outdoor unit according to the present invention can absorb a plurality of frequencies that cause noise over a wide band, so there is a remarkable effect in reducing noise. .

And, since the interior of the lower body portion 83 and the upper body portion 103 having a sound-absorbing function can be configured in a polygonal shape, it is possible to form a sound-absorbing mechanism that does not have a problem in terms of structural rigidity.

In addition, the first noise reduction unit 70 may adjust the target frequency for sound absorption by varying the volume of the lower inner space 82 and the size of the lower entrance hole 81 . Therefore, it is possible to improve the noise reduction effect by absorbing noise frequencies that are a problem more widely than when there is only one target frequency for sound absorption.

In addition, the second noise reduction unit 90 can also adjust the target frequency for sound absorption by varying the volume of the upper inner space portion 102 and the size of the upper entrance hole 101 . Therefore, it is possible to improve the noise reduction effect by absorbing noise frequencies that are a problem more widely than when there is only one target frequency for sound absorption.

Meanwhile, the barrier unit 50 may be formed of an injection material such as plastics rather than metal such as an electrogalvanized steel sheet, and may be injection-molded integrally with the sound absorption unit 60 . Therefore, it is possible to reduce the production cost, and it is possible to reduce the time and cost required for assembly and maintenance.

The sound absorbing part 60 provided in the sound absorbing device 1 for an outdoor unit according to an embodiment of the present invention is installed on both sides of the barrier part 50 by combining Helmholtz resonators having a plurality of target frequencies in a certain pattern. And, the combination of these resonators is formed into a plurality of modules to form the sound absorbing portion (60).

Since the sound-absorbing part 60 with holes formed toward both sides of the barrier part 50 is formed independently of each other without communicating with each other, the sound-absorbing part 60 may have different sound-absorbing target frequencies, respectively.

Meanwhile, since the lower part of the outdoor unit 10 includes the compressor 32 , high-frequency noise is mainly generated, and the upper part of the outdoor unit 10 includes the blowing fan 22 , so low-frequency noise is mainly generated. Accordingly, the upper side of the barrier unit 50 is set to a low frequency region in response to the noise frequency that is a problem, and the lower side of the barrier unit 50 is set to a high frequency region, and accordingly, the first noise reducing unit 70 and the second A noise reduction unit 90 is installed.

In addition, the target frequencies of the resonators installed in the first noise reducing unit 70 and the second noise reducing unit 90 are formed to be adjacent to each other, so that a wider range of noise can be absorbed. For example, when a resonator having four target frequencies is installed in the first noise reduction unit 70, the target frequency of each resonator may be set adjacently at an interval of 100 Hz to 150 Hz.

In addition, the cross-sectional shape of the upper inner space portion 102 and the lower inner space portion 82 may be configured as a rectangle, a square, a circle, an oval, or the like.

In the present invention, the size and position of the hole formed in the sound-absorbing part 60 can be set or randomly. And in order to control a frequency region causing noise in the outdoor unit 10 , the upper part of the barrier unit 50 is set as a region responsible for the low frequency band. Accordingly, by making the hole size of the upper sound absorbing part 100 larger than the hole size of the lower sound absorbing part 80 or by making the inner volume of the upper inner space 102 larger than the inner volume of the lower inner space 82, the low frequency to absorb the noise in the band.

And, the lower part of the barrier part 50 is set as a region in charge of the high-frequency band so as to absorb high-frequency noise generated from the lower part of the compressor 32 . Accordingly, the hole size of the upper sound absorbing part 100 is made smaller than the hole size of the lower sound absorbing part 80, or the inner volume of the upper inner space 102 is smaller than the inner volume of the lower inner space 82, to absorb the noise in the band.

Hereinafter, an operating state of the sound absorbing device 1 for an outdoor unit according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Noise generated during operation of the outdoor unit 10 is reduced by absorbing sound through the lower inlet hole 81 and the upper inlet hole 101 provided in the sound absorbing unit 60 . The high-frequency noise generated during the operation of the compressor 32 is moved to the lower entrance hole 81 of the first noise reduction unit 70 installed at the lower part of the outdoor unit 10, and the target frequency noise is generated by the operation of the Helmholtz resonator. this is reduced

In addition, the noise of the low frequency band compared to the noise of the high frequency band where the noise is reduced by the first noise reduction unit 70 goes to the upper entrance hole 101 of the second noise reduction unit 90 installed on the upper part of the outdoor unit 10 . is moved, and the noise of the target frequency is reduced by the operation of the Helmholtz resonator.

Hereinafter, a sound absorbing device 1 for an outdoor unit according to another embodiment of the present invention will be described with reference to the drawings.

For convenience of description, components having the same configuration and operation as those of an embodiment of the present invention are referred to by the same reference numerals, and detailed description thereof will be omitted.

6 is a cross-sectional view showing the sound absorption unit 160 according to another embodiment of the present invention.

As shown in FIG. 6 , in the sound absorbing part 160 according to another embodiment, a first sound absorbing part 180 and a second sound absorbing part 190 are installed on both sides of the barrier part 50 , respectively. The first sound absorbing part 180 and the second sound absorbing part 190 are respectively connected to both sides of the barrier part 50 , and may be injection-molded integrally with the barrier part 50 .

Since the sound-absorbing part 160 having a volume and having a constant thickness is installed between both sides of the barrier part 50, a plurality of target frequencies that cause noise can be absorbed using the principle of the Helmholtz resonator. there is.

For example, the first sound absorbing part 180 is installed on the first side of the barrier part 50 facing the heat exchange part 20 , and the second side of the barrier part 50 facing the machine room part 30 has a second side. A sound absorbing part 190 may be installed. A plurality of resonators having different target frequencies may be installed in the first sound absorbing unit 180 . For example, four first resonators 181 , 182 , 183 , 184 having different target frequencies for noise reduction may be installed in the first sound absorbing unit 180 .

The first sound absorbing part 180 according to another embodiment of the present invention is located on the first side of the barrier facing the heat exchange part 20, and various within the technical idea of reducing noise generated by the heat exchange part 20 Variation is possible. The first sound absorbing part 180 according to another embodiment of the present invention may include a first entrance hole 185 , a first inner space part 186 , and a first body part 187 .

The first body portion 187 is located on the first side of the barrier portion 50, and various modifications are possible within the technical idea in which the first inner space portion 186 is provided inside. The first body portion 187 may be formed in a hexahedral shape, and may have various shapes such as a sphere, an ellipse, a triangular pyramid, a cylinder, and the like, if necessary.

The first inlet hole 185 is connected to the first inner space 186 , and various modifications are possible within the technical idea of forming a hole in the first body portion 187 facing the heat exchange unit 20 . The thickness of the first body portion 187 in which the first inlet hole 185 is formed is set as the first inlet length 188 . A plurality of target frequencies can be set by adjusting at least one of the volumes of the first sound absorbing part 180 and the first inner space 186 and the cross-sectional area of the first entrance hole 185 according to another embodiment of the present invention. there is. For example, the first sound absorbing unit 180 includes a first resonator 181 having a first body portion 187 and a first inlet hole 185, and a first resonator 181 having a different target frequency is provided. A plurality may be provided. In addition, it is possible to form a plurality of sound-absorbing modules according to the arrangement position of the first resonator (181).

Since the configuration and operation of the first sound absorbing unit 180 are similar to those of the first noise reducing unit 70 , a detailed description thereof will be omitted.

And the second sound absorbing part 190 according to another embodiment of the present invention is located on the second side of the barrier facing the machine room part 30, and within the technical idea of reducing the noise generated in the machine room part 30 Various modifications are possible. The second sound absorbing part 190 according to another embodiment of the present invention may include a second entrance hole 195 , a second inner space part 196 , and a second body part 197 .

The second body portion 197 is connected to the second side surface of the barrier portion 50, and various modifications are possible within the technical idea in which the second inner space portion 196 is provided inside. The second body portion 197 may be formed in a hexahedral shape, and may have various shapes such as a sphere, an ellipse, a triangular pyramid, a cylinder, and the like, if necessary.

The second inlet hole 195 is connected to the second body portion 197, and various modifications are possible within the technical idea of forming a hole on the side of the second body portion 197 facing the machine chamber portion 30. . The second inlet hole 195 is connected to the second inner space 196 and forms a hole in the second body 197 facing the machine chamber 30 .

And the thickness of the second body portion 197 in which the second inlet hole 195 is formed is set as the second inlet length 198 . A plurality of target frequencies can be set by adjusting at least one of the volumes of the second sound absorbing part 190 and the second inner space 196 and the cross-sectional area of the second inlet hole 195 according to another embodiment of the present invention. there is. For example, a plurality of second resonators 191 having a second body part 197 and the second inlet hole 195 may be installed in the second sound absorbing part 190 . A plurality of second resonators 191 having different target frequencies may be installed in the second sound absorbing unit 190 , and a plurality of sound absorbing modules may be formed according to the arrangement position of the second resonator 191 .

The arrangement of the sound-absorbing parts 160 formed on both surfaces of the barrier part 50 may be installed to have a certain pattern, and the barrier part 50 and the sound-absorbing part 160 may be integrally injection-molded.

In the sound absorption device 1 for an outdoor unit according to an embodiment of the present invention, the resonator installed toward the heat exchange unit 20 and the resonator installed toward the machine room 30 are displaced from each other, and the blower fan 22 generates It is possible to absorb noise and noise generated from the compressor 32 and the pipe, respectively.

In addition, the sound absorbing part 160, when the size of the inlet hole 62 is reduced, the sound absorbing performance of the low frequency band increases, and even when the volume of the inner space portion 65 becomes large, the sound absorbing performance of the low frequency band is increased. Since the Helmholtz resonance frequency to be installed on both surfaces of the barrier unit 50 is variously formed by using this sound-absorbing property to secure the sound-absorbing performance of a wide broadband, the low-noise outdoor unit 10 can be provided.

7 is a cross-sectional view illustrating a state in which the first resonators 181 having different frequencies are installed in the first sound absorbing unit 180 according to another embodiment of the present invention, and FIG. It is a view showing a state in which noise is reduced by the first sound absorbing unit 180 .

As shown in FIGS. 7 and 8 , it will be described that four first resonators 181 , 182 , 183 , 184 having different target frequencies are installed in the first sound absorbing unit 180 as an example. The four first resonators 181 , 182 , 183 , and 184 set different sizes of the first inlet holes 185 to have different target frequencies for noise reduction.

The smaller the size of the first entrance hole 185, the smaller the target frequency for noise reduction, and the larger the size of the first entrance hole 185, the larger the target frequency for noise reduction. As a result of measuring the sound absorption rate by installing the first sound absorption unit 180 , as shown in FIG. 8 , the solid line indicates the theoretical sound absorption rate, and the dotted line indicates the sound absorption rate when actually evaluated. As shown in FIG. 8 , it is possible to have an improved sound absorption coefficient in a wide frequency band by the first sound absorbing unit 180 having a plurality of target frequencies rather than a resonator having a single target frequency.

In this way, in order to vary the target frequencies of the first resonators 181 , 182 , 183 , and 184 , the size of the upper entrance hole 101 may be slightly different, and the internal volume of the first inner space 186 may be formed differently.

The resonator provided in the sound absorption unit 160 according to the present invention can be formed in two to a plurality of combinations, and as this combination is formed into a plurality of modules, the upper part of the barrier unit 50 reduces noise in the low frequency band. can be reduced, and the lower part of the barrier part 50 can reduce noise in the high frequency band.

9 is a view showing a state in which a plurality of first resonators (181, 182, 183, 184) are arranged in a first combination according to another embodiment of the present invention.

As shown in FIG. 9 , since four first resonators 181 , 182 , 183 , 184 having different noise reduction target frequencies are installed in various positions in a rectangular arrangement one by one, a first combination can be formed.

10 is a view showing a state in which a plurality of first resonators (181, 182, 183, 184) are arranged in a second combination according to another embodiment of the present invention.

As shown in FIG. 10 , since four first resonators 181 , 182 , 183 , and 184 having different noise reduction target frequencies are installed while changing positions in a rectangular arrangement two by two, a second combination can be formed.

11 is a view showing a state in which a plurality of first resonators (181, 182, 183, 184) are arranged in a third combination according to another embodiment of the present invention.

As shown in FIG. 11 , since four first resonators 181 , 182 , 183 , 184 having different noise reduction target frequencies are installed by changing positions in a rectangular arrangement by three, a third combination can be formed.

12 is a view showing a state in which a plurality of first resonators (181,182,183,184) are arranged in a fourth combination according to another embodiment of the present invention.

As shown in FIG. 12 , since the four first resonators 181 , 182 , 183 , 184 having different noise reduction target frequencies are installed by changing their positions in a rectangular arrangement by three, a fourth combination can be formed.

Although the number of resonators having different frequencies in the first resonators 181 , 182 , 183 , and 184 has been described as four, the number of resonators may be increased or decreased as needed. In addition, the second sound absorbing part 190 may also be installed in a module form by arranging a plurality of resonators in the same manner as the first sound absorbing part 180 .

The first resonator 181 installed in the first sound absorbing unit 180 in the above manner may be arranged in various combinations to effectively absorb noise in a specific frequency band. And in this way, the second resonator 191 installed in the second sound absorbing part 190 can also be arranged in various combinations to effectively absorb noise in a specific frequency band, and is formed of a plurality of modules and is more than a single resonator. It has a wide sound absorption band.

In the sound absorbing device 1 for an outdoor unit according to another embodiment of the present invention, since the sound absorbing units 160 having a plurality of target frequencies for reducing noise are installed on both sides of the barrier unit 50, the outdoor unit 10 ) can reduce a plurality of frequencies generated in

As described above, according to the present invention, the sound absorbing device 1 for an outdoor unit according to the present invention reduces the noise generated by the outdoor unit 10 by the sound absorbing parts 60 and 160 using the resonance phenomenon of sound waves, thereby increasing consumer satisfaction. can be improved In addition, since noise of various frequencies generated in the outdoor unit 10 can be absorbed by the sound absorption units 60 and 160 having a plurality of target frequencies for sound absorption, the operating noise of the outdoor unit 10 can be reduced. In addition, by installing a Helmholtz resonator using the resonance phenomenon of sound waves in the outdoor unit 10, it is possible to effectively absorb the noise in the low-frequency region generated at the upper part of the outdoor unit 10 and the noise in the high-frequency region generated in the lower part of the outdoor unit 10, so the operation of the outdoor unit 10 noise can be reduced. In addition, since there is no need to additionally attach a sound absorbing material for noise reduction, material and production costs can be reduced. In addition, since the sound-absorbing parts 60 and 160 and the barrier part 50 can be integrally injection-molded, material costs and production costs can be reduced.

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in this specification, and various methods can be obtained by those skilled in the art within the scope of the technical spirit of the present invention. It is obvious that variations can be made. In addition, although the effects according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

1,5: Sound absorption device for outdoor unit
10: outdoor unit
20: heat exchange unit 22: blow fan 24: heat exchanger
30: machine room 32: compressor
40: case part 42: lower case 44: side case
50: barrier part 51: first barrier 52: second barrier
60,160: sound absorbing part 62: entrance hole 65: inner space part
70: first noise reduction unit
80: lower sound absorbing part 81: lower entrance hole 82: lower inner space part 83: lower body part L1: lower entrance length
90: second noise reduction unit
100: upper sound absorbing portion 101: upper entrance hole 102: upper inner space portion 103: upper body portion L2: upper entrance length
180: first sound absorbing part
181,182,183,184: first resonator 185: first entrance hole 186: first inner space portion 187: first body portion 188: first entrance length
190: second sound absorbing part
191: second resonator 195: second entrance hole 196: second inner space portion 197: second body portion 198: second entrance length

Claims (15)

a barrier part positioned between the heat exchange part in which the blowing fan and the heat exchanger are installed and the machine room part in which the compressor is installed, and dividing the heat exchange part and the machine room part; and
It is connected to the barrier part, the inlet hole is installed toward the heat exchange part and the machine room part, and has an inner space part connected to the inlet hole and a sound absorbing part for reducing noise;
The barrier unit may include: a first barrier installed between the blower fan and the compressor in a standing state; and
and a second barrier installed between the heat exchanger and the compressor in a standing state.
The sound absorbing unit is located under the barrier unit, the first noise reduction unit for absorbing the noise of the target frequency in the first target section; and
and a second noise reduction unit located above the first noise reduction unit and absorbing the noise of the target frequency in the second target section;
The target frequency of the first target section is set to be greater than the target frequency of the second target section,
The first noise reduction unit is set to a plurality of target frequencies included in the first target section,
The second noise reduction unit is set to a plurality of target frequencies included in the second target section,
The first noise reduction unit absorbs high-frequency sound, and the second noise reduction unit absorbs low-frequency sound,
The first noise reduction unit may include: a lower body part connected to the barrier part and having a lower inner space part inside; and
and a lower inlet hole connected to the lower body part and forming a hole in a side surface of the lower body part facing the heat exchange part or the machine room part;
The lower body part is installed under the barrier part facing the compressor,
The lower body part is connected to each other in succession, and the sound absorbing device for an outdoor unit in which the barrier part is installed along the circumference of the lower body part.
delete According to claim 1,
The sound absorbing device for an outdoor unit in which the barrier part and the sound absorbing part are integrally injection-molded.
delete According to claim 1,
The first noise reduction unit may be configured to set a plurality of target frequencies by adjusting at least one of a volume of the lower inner space and a cross-sectional area of the lower entrance hole.
According to claim 1,
The second noise reduction unit may include: an upper body part connected to the barrier part, the upper body part having an upper inner space part inside; and
and an upper inlet hole connected to the upper body part and forming a hole in a side surface of the upper body part facing the heat exchange part or the machine room part.
7. The method of claim 6,
The second noise reduction unit may be configured to set a plurality of target frequencies by adjusting at least one of a volume of the upper inner space and a cross-sectional area of the upper entrance hole.
a barrier part positioned between the heat exchange part in which the blowing fan and the heat exchanger are installed and the machine room part in which the compressor is installed, and dividing the heat exchange part and the machine room part; and
It is connected to the barrier part, the inlet hole is installed toward the heat exchange part and the machine room part, and has an inner space part connected to the inlet hole and a sound absorbing part for reducing noise;
The sound absorbing part may include: a first sound absorbing part located on a first side of the barrier part facing the heat exchange part and reducing noise generated by the heat exchange part; and
and a second sound absorbing part located on the second side of the barrier part facing the machine room part and reducing noise generated in the machine room part;
The first sound absorbing unit is provided with a plurality of first resonators having different target frequencies,
The second sound absorbing unit is provided with a plurality of second resonators having different target frequencies,
The first sound absorbing portion, the first body portion is located on the first side and provided with a first inner space on the inner side; and
a first inlet hole connected to the first inner space and forming a hole in the first body part facing the heat exchange part; and
The second sound absorbing portion, the second body portion is located on the second side, the second body portion is provided with a second inner space on the inner side; and
a second inlet hole connected to the second inner space and forming a hole in the second body part facing the machine room part; and
The first sound absorbing part includes the first resonator having the first body part and the first inlet hole,
Forming a plurality of sound-absorbing modules according to the arrangement position of the first resonator,
The second sound absorbing part includes the second resonator having the second body part and the second inlet hole,
Forming a plurality of sound-absorbing modules according to the arrangement position of the second resonator,
The first sound absorbing part and the second sound absorbing part are integrally injection-molded with the barrier part.
delete 9. The method of claim 8,
The first sound absorbing part may be configured to set a plurality of target frequencies by adjusting at least one of a volume of the first inner space and a cross-sectional area of the first inlet hole.
delete delete 9. The method of claim 8,
The second sound absorbing part may be configured to set a plurality of target frequencies by adjusting at least one of a volume of the second inner space and a cross-sectional area of the second inlet hole. delete delete

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