WO2023175875A1 - Outdoor unit for air conditioner - Google Patents

Outdoor unit for air conditioner Download PDF

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Publication number
WO2023175875A1
WO2023175875A1 PCT/JP2022/012507 JP2022012507W WO2023175875A1 WO 2023175875 A1 WO2023175875 A1 WO 2023175875A1 JP 2022012507 W JP2022012507 W JP 2022012507W WO 2023175875 A1 WO2023175875 A1 WO 2023175875A1
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WO
WIPO (PCT)
Prior art keywords
outdoor unit
air
parts
slit
silencing
Prior art date
Application number
PCT/JP2022/012507
Other languages
French (fr)
Japanese (ja)
Inventor
直彦 本間
晃 久保
Original Assignee
三菱電機株式会社
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2022/012507 priority Critical patent/WO2023175875A1/en
Publication of WO2023175875A1 publication Critical patent/WO2023175875A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/40—Vibration or noise prevention at outdoor units

Definitions

  • the present disclosure relates to an outdoor unit of an air conditioner including a blower.
  • the air inlet is configured with a wire guard or an outer casing, and air is sucked in from the air inlet, passes through a heat exchanger, and then is blown outside by a blower. Ru.
  • the air blowing noise generated from the air blower may pass through the heat exchanger and the air suction port and leak to the outside.
  • Patent Document 1 discloses an outdoor unit as described above, which has a configuration for reducing noise.
  • the outdoor unit includes a suction panel in at least one of the air suction ports, which is provided with a reflection section that reflects air blowing sound from the blower.
  • the reflecting portion is provided at a position through which air flowing into the outdoor unit passes. Therefore, air inflow may be blocked and pressure loss may increase. Furthermore, since the inflow path of air into the outdoor unit is narrowed by the reflective portion, the amount of air passing through the heat exchanger may be reduced. Therefore, there is a possibility that air function will be reduced.
  • the present disclosure has been made to solve the above problems, and aims to provide an outdoor unit for an air conditioner that reduces noise from a blower without impairing air conditioning performance.
  • the outdoor unit of an air conditioner includes a casing that forms an outer shell of the outdoor unit and in which an air suction port is formed, and a casing that is arranged within the casing to face the air suction port.
  • the air suction port is divided into a plurality of openings by the plurality of muffling parts, and each of the muffling parts of the plurality of muffling parts has a first surface parallel to the inflow direction of the air into the casing;
  • the slit extends in the vertical direction, and the horizontal cross-sectional shape of each of the silencing parts includes a C-shape with the slit as an open end, and the slit of each of the silencing parts has a slit extending in the vertical direction. Of these, the slit is opposed to the slit of the horizontally adjacent sound deadening section.
  • each of the plurality of sound deadening parts that divides the air inlet into the plurality of openings is provided with a slit extending in the vertical direction on the first surface.
  • the horizontal cross-sectional shape of each muffling section includes a C-shape with the slit as an open end.
  • the slit of each muffling section faces the slit of the adjacent muffling section. That is, each of the two adjacent silencing parts is provided with a gap that communicates with the two silencing parts through the slits of the two silencing parts. Sound waves generated by the rotation of the blower propagate to the outside of the housing through the plurality of openings.
  • the outdoor unit When the sound wave reaches a position opposite the slit, it expands through the slit into the air gap, and when it passes through the slit, it contracts. Such expansion and contraction of the sound waves induces reflection and interference of the sound waves, and the energy of the sound waves is consumed. Therefore, air blowing noise from the air blower is reduced when passing through the opening. Moreover, according to the outdoor unit according to the present disclosure, an air inflow path is ensured. Therefore, the outdoor unit can maintain both air conditioning capacity and suppress noise.
  • FIG. 1 is a perspective view illustrating an outdoor unit of an air conditioner according to a first embodiment.
  • FIG. 2 is a front view illustrating the outdoor unit of the air conditioner according to the first embodiment.
  • FIG. 3 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the first embodiment.
  • FIG. 7 is a perspective view illustrating a sound deadening section according to a second embodiment.
  • FIG. 7 is a side view illustrating a sound deadening section according to a second embodiment.
  • FIG. 7 is a diagram illustrating cross sections in the horizontal direction at two positions at different heights of the sound deadening section according to the second embodiment.
  • 7 is a diagram illustrating a cross section in the horizontal direction of a sound deadening section according to Embodiment 3.
  • FIG. 3 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the first embodiment.
  • FIG. 7 is a perspective view illustrating a sound deadening section according
  • FIG. 7 is a side view illustrating each of two muffling sections according to Embodiment 3;
  • FIG. 7 is a diagram illustrating a cross section in the horizontal direction of a sound deadening section according to a fourth embodiment.
  • FIG. 7 is a front view illustrating an outdoor unit according to a fifth embodiment.
  • FIG. 7 is a diagram illustrating a cross section in the horizontal direction of a sound deadening section according to a sixth embodiment.
  • FIG. 1 is a perspective view illustrating an outdoor unit of an air conditioner according to a first embodiment.
  • FIG. 2 is a front view illustrating the outdoor unit of the air conditioner according to the first embodiment.
  • the outdoor unit 100 includes a heat exchanger 2, a blower 3, a compressor, a valve, electrical components, and the like inside a casing 1 forming an outer shell.
  • the heat exchanger 2 and the blower 3 are arranged in an upper ventilation chamber within the housing 1, and the compressor, valves, electrical components, etc. are arranged in a lower machine room within the housing 1.
  • Components such as the heat exchanger 2, blower 3, compressor, valves, and electrical components are fixed within the housing 1.
  • the housing 1 forming the outer shell of the outdoor unit 100 is made of steel, for example.
  • the housing 1 may be formed of a plurality of steel plates.
  • the heat exchanger 2 is arranged to face each of the plurality of side surfaces of the housing 1 .
  • An air suction port 4 is formed in each of the plurality of side surfaces of the housing 1 at a portion facing the heat exchanger 2 .
  • the air suction port 4 is provided with a plurality of muffling sections 5 and one or more muffling auxiliary sections 6.
  • Each muffling section 5 extends in the vertical direction of the outdoor unit 100.
  • the auxiliary silencing section 6 extends in the horizontal direction.
  • the air suction port 4 is divided into a plurality of openings 7 by being partitioned by a plurality of silencing parts 5 and one or more auxiliary silencing parts 6. Note that the outdoor unit 100 does not need to include one or more auxiliary silencing parts 6, and in this case, the air suction port 4 is partitioned in the horizontal direction by a plurality of silencing parts 5.
  • the blower 3 When the outdoor unit 100 starts operating, the blower 3 is driven by a drive source such as a motor (not shown). Then, in the blower chamber, the pressure on the side where the blower 3 sucks air, that is, the area on the upstream side of the blower 3 in the air flow direction, decreases and becomes negative pressure. Thereby, the air outside the outdoor unit 100 flows into the housing 1 through the opening 7, and when passing through the heat exchanger 2, the temperature changes due to heat exchange. The air whose temperature has changed after passing through the heat exchanger 2 is discharged to the outside of the outdoor unit 100 by the blower 3. The blower 3 generates a blowing sound ⁇ by rotation.
  • the blowing sound ⁇ passes through the heat exchanger 2 and propagates from the opening 7 to the outside of the outdoor unit 100.
  • the blowing sound ⁇ propagated to the outside of the outdoor unit 100 can become noise.
  • the muffler 5 is provided to reduce the air blowing noise ⁇ to the outside.
  • the configuration contents, functions, etc. of the muffling section 5 will be explained.
  • FIG. 3 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the first embodiment.
  • the cross section illustrated in FIG. 3 is a cross section in the XX direction parallel to the left-right direction shown in FIG.
  • the muffler 5 has a slit 8 extending in the vertical direction on a first surface 5A parallel to the direction in which air flows into the housing 1. Note that the direction in which air flows into the housing 1 is the direction indicated by the arrow ⁇ .
  • the horizontal cross-sectional shape of the muffler 5 includes a C-shape with the slit 8 as an open end.
  • the cross-sectional shape of one sound deadening portion 5 is a C-shape with the slit 8 provided on the right side as an open end, and the slit 8 provided on the left side is open. and an inverted C-shape as an end. That is, one muffling section 5 has a slit 8 that opens toward the right side and a slit 8 that opens toward the left side, and the two slits 8 are partitioned by a wall 5B. A void 9, which is a space, is provided between the slit 8 and the wall 5B.
  • the slit 8 of each muffling section 5 faces the slit 8 of the horizontally adjacent muffling section 5 .
  • the blowing sound ⁇ propagates between the plurality of silencers 5.
  • the path through which the blowing sound ⁇ propagates may be referred to as a propagation path.
  • the distance between two mutually adjacent mufflers 5 corresponds to the width of the propagation path in the horizontal direction.
  • the left-right direction is illustrated as the horizontal direction, and the first distance in FIG. 3 corresponds to the width in the left-right direction of the opening 7 formed by the two mutually adjacent muffling parts 5.
  • the horizontal width of the propagation path between two adjacent silencing parts 5 is narrow in the propagation path until the blowing sound ⁇ reaches the slit 8 and the propagation path after the blowing sound ⁇ passes through the slit 8.
  • the propagation path where the slit 8 is located is wide. That is, the distance between two adjacent muffling parts 5 at the position where the slit 8 is present is longer than the distance between the two adjacent muffling parts 5 at the position where the slit 8 is not present on the first surface 5A.
  • a sound wave it refers to something corresponding to the blowing sound ⁇ .
  • the acoustic impedance changes as the sound waves expand and contract along the propagation path. Specifically, reflection and interference of the sound waves are induced in the portions of the propagation path where the sound waves expand and contract, thereby consuming the energy of the sound waves and suppressing leakage of the blowing sound ⁇ to the outside.
  • An outdoor unit 100 of an air conditioner according to Embodiment 1 includes a housing 1 , a heat exchanger 2 , a blower 3 , and a plurality of silencers 5 .
  • the housing 1 forms the outer shell of the outdoor unit 100 and has an air suction port 4 formed therein.
  • Heat exchanger 2 is arranged to face air suction port 4 .
  • the blower 3 is installed inside the casing 1 and guides air outside the casing 1 into the inside of the casing 1.
  • the plurality of muffling sections 5 are provided at the air suction port 4 and extend in the vertical direction.
  • the air suction port 4 is divided into a plurality of openings 7 by a plurality of muffling parts 5.
  • Each muffler 5 has a slit 8 extending in the vertical direction on a first surface 5A parallel to the direction in which air flows into the housing 1.
  • the horizontal cross-sectional shape of each muffling section 5 includes a C-shape with the slit 8 as an open end.
  • the slit 8 of each muffling section 5 faces the slit 8 of a horizontally adjacent muffling section 5 among the plurality of muffling sections 5 .
  • the blowing noise ⁇ generated by the blower 3 propagates to the outside through the opening 7, and the noise damping portion 5 provided with the slit 8 is arranged on both sides of the opening 7. Therefore, the sound wave spreads when reaching the position facing the slit 8, and contracts after passing through the position. That is, when the sound waves reach a position opposite to the slit 8, they spread through the slit 8 to the cavity 9, and when they pass through the position, they are narrowed. As a result, reflection and interference of the sound waves are induced in the portions of the propagation path where the sound waves expand and contract, and the energy of the sound waves is consumed. Therefore, the blowing sound ⁇ is reduced when passing through the opening 7. Therefore, even if the opening 7 does not have a component such as a reflective plate for blocking sound waves, noise can be reduced. Therefore, it is possible to suppress noise while maintaining the air inflow path and maintaining the air conditioning capacity.
  • Embodiment 2 The outdoor unit 100 according to the second embodiment will be described in detail below.
  • the same reference numerals are given to the same components as those in the first embodiment.
  • descriptions of configurations similar to those in the first embodiment, functions similar to those in the first embodiment, etc. will be omitted unless there are special circumstances.
  • FIG. 4 is a perspective view illustrating a sound deadening section according to the second embodiment.
  • FIG. 5 is a side view illustrating the muffler according to the second embodiment.
  • FIG. 6 is a diagram illustrating cross sections in the horizontal direction at two positions at different heights of the muffling section according to the second embodiment. Note that the height means the height from the installation surface of the outdoor unit 100.
  • FIG. 6 shows a cross section at a position indicated by Y in FIG. 5 and a cross section at a position indicated by Z.
  • the "Y cross section” in FIG. 6 refers to the cross section at the position indicated by Y, and the "Z cross section” refers to the cross section at the position indicated by Z.
  • the upper edge portion 10 which is the edge portion on the upstream side in the air inflow direction, is vertically It is formed into a wave shape whose amplitude changes along the line.
  • the direction of the amplitude of the upper edge 10 is parallel to the direction of air inflow.
  • the wave shape of the upper edge portion 10 is a sine wave, a rectangular wave, a triangular wave, a sawtooth wave, or the like.
  • the wave shape of the upper edge portion 10 may include a plurality of these shapes. That is, the wave shape of the upper edge portion 10 is either a sine wave or a rectangular wave at a certain height, and is a sine wave at a height other than the certain height. Alternatively, other shapes such as a rectangular wave may be used.
  • the width of the slit 8 changes continuously along the vertical direction.
  • Continuously changing the width of the slit 8 promotes reflection and interference of sound waves of various wavelengths passing through positions facing the slit 8 on the propagation path. Therefore, the energy of sound waves of various frequencies is reduced, and the energy of the blowing sound ⁇ as a whole is reduced.
  • the upper edge portion 10 which is the edge portion on the upstream side in the air inflow direction, is formed in a wave shape whose amplitude changes in the vertical direction.
  • the direction of the amplitude is parallel to the direction of air inflow.
  • the width of the slit 8 changes continuously along the vertical direction.
  • the slits 8 of various widths can induce reflection and interference of sound waves of various wavelengths in the blast sound ⁇ before and after passing through a position facing the slit 8. Therefore, the energy of sound waves of various wavelengths can be reduced. That is, it becomes possible to reduce the energy of not only sound waves of a specific frequency but also of sound waves of a plurality of wide range of frequencies, and it is possible to expand the range of frequencies of sound waves to be silenced.
  • Embodiment 3 The outdoor unit 100 according to the third embodiment will be described in detail below. Note that in the third embodiment, the same reference numerals are given to the same components as those in the first to second embodiments. Furthermore, in Embodiment 3, there are no special circumstances regarding the configuration similar to the configuration in Embodiment 1 to Embodiment 2, and the same functions as in Embodiment 1 to Embodiment 2. The explanation will be omitted as far as possible.
  • FIG. 7 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the third embodiment.
  • FIG. 7 shows two mufflers 5 adjacent to each other.
  • FIG. 8 is a side view illustrating each of two mufflers according to the third embodiment.
  • FIG. 8 shows the state of one of the two muffling sections 5 shown in FIG. 7 when viewed in the direction indicated by the white arrow D in FIG. 7, and the state of the other of the two muffling sections 5 shown in FIG. The state when viewed in the direction indicated by the white arrow E is shown.
  • (D) in FIG. 8 refers to the case viewed in the direction indicated by the outlined arrow D in FIG. 7
  • (E) refers to the case viewed in the direction indicated by the outlined arrow E in FIG.
  • the widths of the slits 8 of the two muffling sections 5 at the same height are different from each other.
  • the widths of the slits 8 of two adjacent muffling sections 5 are different, so that the acoustic characteristics differ from those of the first embodiment.
  • the width of the propagation path in the horizontal direction is determined from the upstream side of the sound wave to the portion where the first surfaces 5A of adjacent silencing parts 5 face each other, the width of the left silencing part 5, A portion where the first surface 5A and the wall 5B of the right sound deadening section 5 face each other, a portion where the walls 5B of the left and right sound deadening sections 5 face each other, a first surface 5A of the left sound deadening section 5 and the right sound deadening section 5 and the wall 5B of the silencing section 5, and a section where the first surfaces 5A of the silencing section 5 face each other.
  • the width of the propagation path at the portion where the first surface 5A of the left silencing section 5 and the wall 5B of the right silencing section 5 face each other is the width of the propagation path at the portion where the first surfaces 5A of the adjacent silencing sections 5 face each other. is larger than the width of the propagation path at .
  • the width of the propagation path at the portion where the walls 5B of the left and right sound deadening portions 5 face each other is the width of the propagation path at the portion where the first surface 5A of the left sound deadening portion 5 and the wall 5B of the right sound deadening portion 5 face each other. is larger than the width of the propagation path.
  • the width of the propagation path is determined from the upstream side of the sound wave to the portion where the first surfaces 5A of the adjacent silencing parts 5 face each other, It changes in the portion where the respective walls 5B of the left and right muffling parts 5 face each other, and in the part where the first surfaces 5A of the muffling part 5 face each other. Therefore, the change in the width of the propagation path as the sound wave progresses in the third embodiment is different from the change in the width of the propagation path as the sound wave progresses in Embodiments 1 and 2.
  • Embodiment 3 the number of changes in the width of the propagation path as the sound wave advances is greater than in Embodiments 1 and 2. Therefore, in the third embodiment, acoustic characteristics different from those in the first and second embodiments can be obtained.
  • the width of the slit 8 of each muffling section 5 at the same height from the installation surface of the outdoor unit 100 is different from the width of the slit 8 of the muffling section 5 adjacent to each muffling section 5 .
  • Embodiment 4 The outdoor unit 100 according to Embodiment 4 will be described in detail below. Note that in the fourth embodiment, the same reference numerals are given to the same components as those in the first to third embodiments. Furthermore, in Embodiment 4, there are no special circumstances regarding the configuration similar to the configuration in Embodiment 1 to Embodiment 3, and the same functions as in Embodiment 1 to Embodiment 3. The explanation will be omitted as far as possible.
  • FIG. 9 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the fourth embodiment.
  • FIG. 9 shows two mufflers 5 adjacent to each other.
  • the width of the opening 7 formed by the two muffling parts 5, that is, the distance between the two muffling parts 5, is the same as that between the inside and outside of the outdoor unit 100. It's different.
  • the inner opening 7 of the outdoor unit 100 may be referred to as an inner opening 7A
  • the outer opening 7 may be referred to as an outer opening 7B.
  • the width of the inner opening 7A is greater than that of the outer opening 7B.
  • the width of the propagation path is, in order from the upstream side of the sound wave, a portion where the first surfaces 5A of the inner opening 7A face each other, a portion where the walls 5B face each other, and a portion where the first surfaces 5A of the outer opening 7B face each other. It changes in the opposing part.
  • the first surfaces 5A mean the first surfaces 5A of two adjacent sound deadening sections 5
  • the walls 5B mean the walls 5B of two adjacent sound deadening sections 5. .
  • the width of the propagation path at the portion where the walls 5B face each other is the width of the propagation path at the portion where the first surfaces 5A of the inner opening 7A face each other, and the width of the propagation path at the portion where the first surfaces 5A of the outer opening 7B face each other. Greater than the width at the part. Further, the width of the propagation path in the portion of the inner opening 7A where the first surfaces 5A face each other is larger than the width of the portion of the outer opening 7B where the first surfaces 5A face each other.
  • the change in the width of the propagation path as the sound wave progresses in the fourth embodiment is different from the change in the width of the propagation path as the sound wave progresses in Embodiments 1 to 3.
  • acoustic characteristics different from those in the first to third embodiments can be obtained.
  • each muffling section 5 and the muffling section 5 adjacent to each muffling section 5 in Embodiment 4 is longer than the distance at the end of each muffling section 5 on the side far from the heat exchanger 2. That is, the width of the inner opening 7A is larger than the width of the outer opening 7B.
  • the outdoor unit 100 can reduce noise in a wide frequency range while ensuring the air volume necessary for air conditioning and maintaining air conditioning performance.
  • Embodiment 5 the horizontal and vertical lengths of the opening 7 are determined based on the noise distribution and the wind speed distribution.
  • the outdoor unit 100 according to the fifth embodiment will be described in detail below.
  • the same reference numerals are given to the same components as those in the first to fourth embodiments.
  • Embodiment 5 there are no special circumstances regarding the configuration similar to the configuration in Embodiment 1 to Embodiment 4, and the same functions as in Embodiment 1 to Embodiment 4. The explanation will be omitted as far as possible.
  • FIG. 10 is a front view illustrating the outdoor unit according to the fifth embodiment.
  • the outdoor unit 100 is a top flow type in which the blower 3 is attached to the upper part of the housing 1 as described above.
  • the flow velocity of air flowing into the outdoor unit 100 is shown by the flow velocity distribution 20 in FIG. 10 .
  • the airflow flowing into the housing 1 is faster as it is closer to the blower 3 and slower as it is farther from the blower 3. That is, the flow velocity of air differs in the vertical direction, the flow velocity of air at a high position near the blower 3 is high, and the flow velocity of air at a low position away from the blower 3 is low.
  • the blowing sound ⁇ is louder in the upper part of the housing 1 nearer to the blower 3, and smaller in the lower part farther from the blower 3.
  • the plurality of openings 7 in the fifth embodiment are formed by the plurality of muffling parts 5 and one or more muffling auxiliary parts 6 as follows. That is, the plurality of openings 7 are arranged with the plurality of sound deadening parts 5 so that the openings 7 located at higher positions are longer in the vertical direction and shorter in the horizontal direction than the openings 7 located at lower positions. It is formed by one or more silencing auxiliary parts 6.
  • the length of each of the four openings 7 in the vertical direction is written as H1, H2, H3, and H4 in order from the top.
  • the horizontal lengths of each of the four openings 7 are written as W1, W2, W3, and W4 in order from the top.
  • the length relationship in the vertical direction of each of the four openings 7 is H1>H2>H3>H4.
  • the horizontal length of each of the four openings 7 has a relationship of W1 ⁇ W2 ⁇ W3 ⁇ W4.
  • the outdoor unit 100 according to the first embodiment further includes one or more silencing auxiliary parts 6.
  • One or more auxiliary silencing parts 6 are provided at the air suction port 4 and extend in the horizontal direction.
  • the plurality of openings 7 are formed by a plurality of muffling parts 5 horizontally dividing the air suction port 4 and one or more muffling auxiliary parts 6 dividing the air suction port 4 in the vertical direction.
  • the openings 7 located at higher positions from the installation surface of the outdoor unit 100 are longer in the vertical direction and shorter in the horizontal direction than the openings 7 located at lower positions.
  • the muffling section 5 located at a higher position is longer in the vertical direction and is provided more in the horizontal direction than the muffling section 5 located at a lower position. Therefore, the loud air blowing noise ⁇ propagating from the upper part of the housing 1 to the outside of the housing 1 through the opening 7 is reduced by the noise damping parts 5 that are densely provided above the housing 1.
  • the noise damping parts 5 that are densely provided above the housing 1.
  • the number of muffling parts 5 is smaller than that in the upper part, the inflow of air is prevented from being obstructed by the muffling parts 5. Therefore, it is possible to reduce the pressure loss in the lower part of the housing 1 and secure the air volume.
  • Embodiment 6 the shape of the muffling section 5 is a shape having curvature. Thereby, the outdoor unit 100 can efficiently secure the air volume necessary for air conditioning.
  • the outdoor unit 100 according to the sixth embodiment will be described in detail below.
  • the same reference numerals are given to the same components as those in the first to fifth embodiments.
  • Embodiment 6 there are no special circumstances regarding the configuration similar to the configuration in Embodiment 1 to Embodiment 5, and the same functions as in Embodiment 1 to Embodiment 5. The explanation will be omitted as far as possible.
  • FIG. 11 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the sixth embodiment.
  • the cross section of the muffling section 5 of the sixth embodiment is approximately elliptical.
  • the surface of the muffler 5 facing the opening 7, that is, the first surface 5A, has an elliptical arc shape in which a line corresponding to the outer peripheral surface of the cross section extends from the upstream end 5C to the downstream end 5D in the air inflow direction. Note that since the opening 7 faces the heat exchanger 2 in the housing 1, the side of the silencing part 5 facing the heat exchanger 2 is cut off in a plane parallel to the heat exchanger 2. .
  • the slit 8 is provided between the upstream end 5C and the downstream end 5D on the first surface 5A.
  • the slit 8 is provided on the first surface 5A having a curvature.
  • the portion from the upstream end 5C in the air inflow direction to the slit 8 has an arc shape.
  • the cross-sectional shape of the muffler 5 is preferably, for example, a blade cross-sectional shape.
  • the front edge of the muffling section 5 having a wing cross-sectional shape is located at the outermost side of the housing 1 in the muffling section 5 .

Abstract

This outdoor unit for an air conditioner comprises a housing, a heat exchanger, a blower, and a plurality of silencers. The housing forms the outer contour of the outdoor unit and is formed with an air suction port. The heat exchanger is disposed inside the housing so as to face the air suction port. The blower is installed inside the housing and guides the air outside the housing to the interior of the housing. The plurality of silencers are provided at the air suction port and extend in the vertical direction. The air suction port is divided into a plurality of openings by the plurality of silencers. Each of the silencers has a vertically-extending slit in a first surface parallel to the direction of air flow into the housing. The horizontal cross-sectional shape of the silencer includes a C-shape with the slit as an open end. The slit of the silencer faces the slit of the horizontally adjacent silencer among the plurality of silencers.

Description

空気調和機の室外機Air conditioner outdoor unit
　本開示は、送風機を含む空気調和機の室外機に関するものである。 The present disclosure relates to an outdoor unit of an air conditioner including a blower.
　空気調和機の性能の向上には、大風量化が重要視されている。しかし、大風量化に伴い送風機から発生する送風音も大きくなるため、送風音を抑制し騒音を低減した空気調和機が求められている。従来の空気調和機の室外機は、空気吸込口がワイヤーガードまたは外板ケーシング等で構成され、空気は、当該空気吸込口から吸い込まれて、熱交換器を通過後、送風機によって外部に吹き出される。このような室外機においては、送風機から発生した送風音が熱交換器および空気吸込口を通過して外部に漏れる場合がある。 In order to improve the performance of air conditioners, increasing air volume is important. However, as the air volume increases, the blowing noise generated by the blower also increases, so there is a need for an air conditioner that suppresses the blowing noise and reduces noise. In the outdoor unit of a conventional air conditioner, the air inlet is configured with a wire guard or an outer casing, and air is sucked in from the air inlet, passes through a heat exchanger, and then is blown outside by a blower. Ru. In such an outdoor unit, the air blowing noise generated from the air blower may pass through the heat exchanger and the air suction port and leak to the outside.
　特許文献１には、上述したような室外機であって、騒音の低減を図る構成を有する室外機が開示されている。具体的には、当該室外機は、送風機からの送風音を反射する反射部が設けられた吸込みパネルを、空気吸込口の少なくとも１つに備える。 Patent Document 1 discloses an outdoor unit as described above, which has a configuration for reducing noise. Specifically, the outdoor unit includes a suction panel in at least one of the air suction ports, which is provided with a reflection section that reflects air blowing sound from the blower.
特開２００５－２２１１７４号公報Japanese Patent Application Publication No. 2005-221174
　ここで、上記反射部は、室外機に流入する空気が通過する位置に設けられている。そのため、空気の流入が遮られ、圧力損失が増大し得る。また、室外機への空気の流入経路が反射部によって狭められるため、熱交換器を通過する空気の量が減少し得る。従って、空機能力が低減する虞がある。 Here, the reflecting portion is provided at a position through which air flowing into the outdoor unit passes. Therefore, air inflow may be blocked and pressure loss may increase. Furthermore, since the inflow path of air into the outdoor unit is narrowed by the reflective portion, the amount of air passing through the heat exchanger may be reduced. Therefore, there is a possibility that air function will be reduced.
　本開示は、上記課題を解決するためになされたものであり、空調能力を損なうことなく、送風機からの騒音を低減する空気調和機の室外機を提供することを目的とする。 The present disclosure has been made to solve the above problems, and aims to provide an outdoor unit for an air conditioner that reduces noise from a blower without impairing air conditioning performance.
　本開示に係る空気調和機の室外機は、前記室外機の外郭を形成し、且つ、空気吸込口が形成された筐体と、前記筐体内において、前記空気吸込口に対向するよう配置された熱交換器と、前記筐体内に設置され、前記筐体の外部の空気を前記筐体の内部へ導く送風機と、前記空気吸込口に設けられ、上下方向に延びる複数の消音部と、を備え、前記空気吸込口は、前記複数の消音部によって複数の開口部に分けられ、前記複数の消音部の各消音部は、前記筐体への前記空気の流入方向に平行な第１面に、前記上下方向に延びるスリットを有し、前記各消音部の水平方向の断面形状は、前記スリットを開放端とするＣ字形状を含み、前記各消音部の前記スリットは、前記複数の消音部のうち水平方向に隣接する消音部の前記スリットと対向するものである。 The outdoor unit of an air conditioner according to the present disclosure includes a casing that forms an outer shell of the outdoor unit and in which an air suction port is formed, and a casing that is arranged within the casing to face the air suction port. A heat exchanger, a blower installed in the casing and guiding air outside the casing into the inside of the casing, and a plurality of muffling parts provided at the air suction port and extending in the vertical direction. , the air suction port is divided into a plurality of openings by the plurality of muffling parts, and each of the muffling parts of the plurality of muffling parts has a first surface parallel to the inflow direction of the air into the casing; The slit extends in the vertical direction, and the horizontal cross-sectional shape of each of the silencing parts includes a C-shape with the slit as an open end, and the slit of each of the silencing parts has a slit extending in the vertical direction. Of these, the slit is opposed to the slit of the horizontally adjacent sound deadening section.
　本開示に係る空気調和機の室外機によれば、空気吸込口を複数の開口部に分ける複数の消音部の各々は、第１面に、上下方向に延びるスリットが設けられている。各消音部の水平方向の断面形状は、当該スリットを開放端とするＣ字形状を含む。また、各消音部のスリットは、隣接する消音部のスリットと対向する。すなわち、隣接し合う２つの消音部の各々には、当該２つの消音部のスリットを介して連通する空隙が設けられる。送風機の回転によって発生する音波は、複数の開口部を介して筐体の外部に伝搬する。音波は、スリットに対向する位置に達する際に、スリットを介して空隙内に拡大し、スリットを通り過ぎたる際に縮小する。このような音波の拡大と縮小とにより、音波の反射と干渉とが誘起され、音波のエネルギーが消費される。従って、送風機からの送風音は、開口部を通過する際に低減する。また、本開示に係る室外機によれば、空気の流入経路が確保される。よって、室外機は、空調能力の維持と、騒音の抑制との両立を図ることができる。 According to the outdoor unit of the air conditioner according to the present disclosure, each of the plurality of sound deadening parts that divides the air inlet into the plurality of openings is provided with a slit extending in the vertical direction on the first surface. The horizontal cross-sectional shape of each muffling section includes a C-shape with the slit as an open end. Moreover, the slit of each muffling section faces the slit of the adjacent muffling section. That is, each of the two adjacent silencing parts is provided with a gap that communicates with the two silencing parts through the slits of the two silencing parts. Sound waves generated by the rotation of the blower propagate to the outside of the housing through the plurality of openings. When the sound wave reaches a position opposite the slit, it expands through the slit into the air gap, and when it passes through the slit, it contracts. Such expansion and contraction of the sound waves induces reflection and interference of the sound waves, and the energy of the sound waves is consumed. Therefore, air blowing noise from the air blower is reduced when passing through the opening. Moreover, according to the outdoor unit according to the present disclosure, an air inflow path is ensured. Therefore, the outdoor unit can maintain both air conditioning capacity and suppress noise.
図１は、実施の形態１に係る空気調和機の室外機を例示する斜視図である。FIG. 1 is a perspective view illustrating an outdoor unit of an air conditioner according to a first embodiment. 図２は、実施の形態１に係る空気調和機の室外機を例示する正面図である。FIG. 2 is a front view illustrating the outdoor unit of the air conditioner according to the first embodiment. 実施の形態１に係る消音部の水平方向における断面を例示する図である。FIG. 3 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the first embodiment. 実施の形態２に係る消音部を例示する斜視図である。FIG. 7 is a perspective view illustrating a sound deadening section according to a second embodiment. 実施の形態２に係る消音部を例示する側面図である。FIG. 7 is a side view illustrating a sound deadening section according to a second embodiment. 実施の形態２に係る消音部の、異なる高さの２つの位置での水平方向における断面を例示する図である。FIG. 7 is a diagram illustrating cross sections in the horizontal direction at two positions at different heights of the sound deadening section according to the second embodiment. 実施の形態３に係る消音部の水平方向における断面を例示する図である。7 is a diagram illustrating a cross section in the horizontal direction of a sound deadening section according to Embodiment 3. FIG. 実施の形態３に係る２つの消音部の各々を例示する側面図である。FIG. 7 is a side view illustrating each of two muffling sections according to Embodiment 3; 実施の形態４に係る消音部の水平方向における断面を例示する図である。FIG. 7 is a diagram illustrating a cross section in the horizontal direction of a sound deadening section according to a fourth embodiment. 実施の形態５に係る室外機を例示する正面図である。FIG. 7 is a front view illustrating an outdoor unit according to a fifth embodiment. 実施の形態６に係る消音部の水平方向における断面を例示する図である。FIG. 7 is a diagram illustrating a cross section in the horizontal direction of a sound deadening section according to a sixth embodiment.
　以下、図面を参照し、実施の形態に係る空気調和機の室外機について詳述する。なお、以下の図面では各構成部材の大きさの関係が実際のものとは異なる場合がある。 Hereinafter, an outdoor unit of an air conditioner according to an embodiment will be described in detail with reference to the drawings. Note that in the following drawings, the size relationship of each component may differ from the actual one.
　実施の形態１．
　図１は、実施の形態１に係る空気調和機の室外機を例示する斜視図である。図２は、実施の形態１に係る空気調和機の室外機を例示する正面図である。室外機１００は、外郭を形成する筐体１の内部に、熱交換器２、送風機３、圧縮機、弁、および電気部品等を備える。熱交換器２および送風機３は、筐体１内の上部の送風室に配置され、圧縮機、弁、および電気部品等は、筐体１内の下部の機械室に配置されている。熱交換器２、送風機３、圧縮機、弁、および電気部品等の構成要素は、筐体１内において固定されている。 Embodiment 1.
FIG. 1 is a perspective view illustrating an outdoor unit of an air conditioner according to a first embodiment. FIG. 2 is a front view illustrating the outdoor unit of the air conditioner according to the first embodiment. The outdoor unit 100 includes a heat exchanger 2, a blower 3, a compressor, a valve, electrical components, and the like inside a casing 1 forming an outer shell. The heat exchanger 2 and the blower 3 are arranged in an upper ventilation chamber within the housing 1, and the compressor, valves, electrical components, etc. are arranged in a lower machine room within the housing 1. Components such as the heat exchanger 2, blower 3, compressor, valves, and electrical components are fixed within the housing 1.
　室外機１００の外郭を形成する筐体１は、例えば鋼製である。筐体１は、複数の鋼板によって形成されてもよい。熱交換器２は、筐体１の複数の側面の各々に対向するよう配置されている。筐体１の複数の側面の各々には、熱交換器２と対向する部分に空気吸込口４が形成されている。空気吸込口４には、複数の消音部５と１以上の消音補助部６とが設けられている。各消音部５は、室外機１００の上下方向に延びる。消音補助部６は、水平方向に延びる。空気吸込口４は、複数の消音部５と１以上の消音補助部６とによって区画されることによって、複数の開口部７に分けられる。なお、室外機１００は、１以上の消音補助部６を備えなくともよく、この場合には、空気吸込口４は、複数の消音部５によって水平方向において区画される。 The housing 1 forming the outer shell of the outdoor unit 100 is made of steel, for example. The housing 1 may be formed of a plurality of steel plates. The heat exchanger 2 is arranged to face each of the plurality of side surfaces of the housing 1 . An air suction port 4 is formed in each of the plurality of side surfaces of the housing 1 at a portion facing the heat exchanger 2 . The air suction port 4 is provided with a plurality of muffling sections 5 and one or more muffling auxiliary sections 6. Each muffling section 5 extends in the vertical direction of the outdoor unit 100. The auxiliary silencing section 6 extends in the horizontal direction. The air suction port 4 is divided into a plurality of openings 7 by being partitioned by a plurality of silencing parts 5 and one or more auxiliary silencing parts 6. Note that the outdoor unit 100 does not need to include one or more auxiliary silencing parts 6, and in this case, the air suction port 4 is partitioned in the horizontal direction by a plurality of silencing parts 5.
　以下、空気調和機の室外機１００の動作について説明する。室外機１００の運転開始によって、送風機３が不図示のモータなどの駆動源によって駆動される。すると、送風室内において、送風機３が空気を吸い込む側、すなわち、空気の流動方向における送風機３の上流側の領域の圧力が下がり、負圧となる。これにより、室外機１００外の空気は、開口部７を介して筐体１に流入し、熱交換器２を通過する際に熱交換により温度変化する。熱交換器２を通過して温度変化した空気は、送風機３によって室外機１００外へ吐出される。送風機３は、回転によって送風音αを発生させる。送風音αは、熱交換器２を通過して開口部７から室外機１００外へ伝播する。室外機１００外へ伝播した送風音αは、騒音となり得る。消音部５は、外部への送風音αを低減するために設けられる。以下、消音部５の構成内容および機能等について説明する。 Hereinafter, the operation of the outdoor unit 100 of the air conditioner will be explained. When the outdoor unit 100 starts operating, the blower 3 is driven by a drive source such as a motor (not shown). Then, in the blower chamber, the pressure on the side where the blower 3 sucks air, that is, the area on the upstream side of the blower 3 in the air flow direction, decreases and becomes negative pressure. Thereby, the air outside the outdoor unit 100 flows into the housing 1 through the opening 7, and when passing through the heat exchanger 2, the temperature changes due to heat exchange. The air whose temperature has changed after passing through the heat exchanger 2 is discharged to the outside of the outdoor unit 100 by the blower 3. The blower 3 generates a blowing sound α by rotation. The blowing sound α passes through the heat exchanger 2 and propagates from the opening 7 to the outside of the outdoor unit 100. The blowing sound α propagated to the outside of the outdoor unit 100 can become noise. The muffler 5 is provided to reduce the air blowing noise α to the outside. Hereinafter, the configuration contents, functions, etc. of the muffling section 5 will be explained.
　図３は、実施の形態１に係る消音部の水平方向における断面を例示する図である。なお、図３に例示する断面は、図２に示す左右方向に平行なＸ－Ｘ方向における断面である。消音部５は、筐体１への空気の流入方向に平行な第１面５Ａに、上下方向に延びるスリット８を有する。なお、筐体１への空気の流入方向は、矢印βが指す方向である。 FIG. 3 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the first embodiment. Note that the cross section illustrated in FIG. 3 is a cross section in the XX direction parallel to the left-right direction shown in FIG. The muffler 5 has a slit 8 extending in the vertical direction on a first surface 5A parallel to the direction in which air flows into the housing 1. Note that the direction in which air flows into the housing 1 is the direction indicated by the arrow β.
　消音部５の水平方向の断面形状は、スリット８を開放端とするＣ字形状を含む。具体的には、図３に示すように、１つの消音部５の断面形状は、右側面に設けられたスリット８を開放端とするＣ字形状と、左側面に設けられたスリット８を開放端とする逆向きのＣ字形状とを含む。すなわち、１つの消音部５は、右側に向かって開口したスリット８と左側に向かって開口したスリット８とを有し、２つのスリット８の間は壁５Ｂによって仕切られている。スリット８と壁５Ｂとの間には、空間である空隙部９が設けられている。各消音部５のスリット８は、水平方向に隣接する消音部５のスリット８と対向する。 The horizontal cross-sectional shape of the muffler 5 includes a C-shape with the slit 8 as an open end. Specifically, as shown in FIG. 3, the cross-sectional shape of one sound deadening portion 5 is a C-shape with the slit 8 provided on the right side as an open end, and the slit 8 provided on the left side is open. and an inverted C-shape as an end. That is, one muffling section 5 has a slit 8 that opens toward the right side and a slit 8 that opens toward the left side, and the two slits 8 are partitioned by a wall 5B. A void 9, which is a space, is provided between the slit 8 and the wall 5B. The slit 8 of each muffling section 5 faces the slit 8 of the horizontally adjacent muffling section 5 .
　送風音αは、複数の消音部５の間を伝搬する。以下では、送風音αが伝搬する経路を伝搬経路と記載する場合もある。互いに隣接する２つの消音部５の間の距離は、伝搬経路の水平方向の幅に対応する。なお、図３では水平方向として左右方向が例示され、図３における第１距離は、互いに隣接する２つの消音部５によって形成された開口部７の左右方向の幅に対応する。 The blowing sound α propagates between the plurality of silencers 5. Below, the path through which the blowing sound α propagates may be referred to as a propagation path. The distance between two mutually adjacent mufflers 5 corresponds to the width of the propagation path in the horizontal direction. In addition, in FIG. 3, the left-right direction is illustrated as the horizontal direction, and the first distance in FIG. 3 corresponds to the width in the left-right direction of the opening 7 formed by the two mutually adjacent muffling parts 5.
　隣り合う２つの消音部５の間の伝搬経路の水平方向の幅は、送風音αがスリット８に達するまでの伝搬経路と、送風音αがスリット８を通過した後の伝搬経路とでは狭く、スリット８が位置する伝搬経路では広い。すなわち、第１面５Ａにおけるスリット８のない位置における、隣り合う２つの消音部５間の距離に対し、スリット８がある位置における、隣り合う２つの消音部５間の距離の方が長い。これにより、音波は、伝搬経路においてスリット８に対向する位置に達する際に、スリット８を介して空隙部９に拡がり、当該位置を通り過ぎると狭まる。なお、当該音波は、送風音αに対応する。以下、音波と記載する場合には、送風音αに対応するものを指す。伝搬経路において音波が拡大し、縮小することによって、音響インピーダンスが変化する。具体的には、伝搬経路における音波が拡大して縮小する部分において、音波の反射と干渉が誘起されることにより、音波のエネルギーが消費され、送風音αの外部への漏れが抑制される。 The horizontal width of the propagation path between two adjacent silencing parts 5 is narrow in the propagation path until the blowing sound α reaches the slit 8 and the propagation path after the blowing sound α passes through the slit 8. The propagation path where the slit 8 is located is wide. That is, the distance between two adjacent muffling parts 5 at the position where the slit 8 is present is longer than the distance between the two adjacent muffling parts 5 at the position where the slit 8 is not present on the first surface 5A. Thereby, when the sound wave reaches a position facing the slit 8 on the propagation path, it spreads into the cavity 9 via the slit 8, and narrows after passing through the position. Note that the sound wave corresponds to the blowing sound α. Hereinafter, when it is described as a sound wave, it refers to something corresponding to the blowing sound α. The acoustic impedance changes as the sound waves expand and contract along the propagation path. Specifically, reflection and interference of the sound waves are induced in the portions of the propagation path where the sound waves expand and contract, thereby consuming the energy of the sound waves and suppressing leakage of the blowing sound α to the outside.
　以下、実施の形態１に係る空気調和機の室外機１００による効果について述べる。実施の形態１に係る空気調和機の室外機１００は、筐体１と熱交換器２と送風機３と複数の消音部５とを備える。筐体１は、室外機１００の外郭を形成すると共に、空気吸込口４が形成されている。熱交換器２は、空気吸込口４に対向するよう配置されている。送風機３は、筐体１内に設置され、筐体１の外部の空気を筐体１の内部に導く。複数の消音部５は、空気吸込口４に設けられ、上下方向に延びる。空気吸込口４は、複数の消音部５によって複数の開口部７に分けられている。各消音部５は、筐体１への空気の流入方向に平行な第１面５Ａに、上下方向に延びるスリット８を有する。各消音部５の水平方向の断面形状は、スリット８を開放端とするＣ字形状を含む。各消音部５のスリット８は、複数の消音部５のうち水平方向に隣接する消音部５のスリット８と対向する。 Hereinafter, the effects of the outdoor unit 100 of the air conditioner according to the first embodiment will be described. An outdoor unit 100 of an air conditioner according to Embodiment 1 includes a housing 1 , a heat exchanger 2 , a blower 3 , and a plurality of silencers 5 . The housing 1 forms the outer shell of the outdoor unit 100 and has an air suction port 4 formed therein. Heat exchanger 2 is arranged to face air suction port 4 . The blower 3 is installed inside the casing 1 and guides air outside the casing 1 into the inside of the casing 1. The plurality of muffling sections 5 are provided at the air suction port 4 and extend in the vertical direction. The air suction port 4 is divided into a plurality of openings 7 by a plurality of muffling parts 5. Each muffler 5 has a slit 8 extending in the vertical direction on a first surface 5A parallel to the direction in which air flows into the housing 1. The horizontal cross-sectional shape of each muffling section 5 includes a C-shape with the slit 8 as an open end. The slit 8 of each muffling section 5 faces the slit 8 of a horizontally adjacent muffling section 5 among the plurality of muffling sections 5 .
　上記構成によれば、送風機３から発生した送風音αは、開口部７を介して外部に伝搬するが、開口部７の両側には、スリット８を設けた消音部５が配置されている。そのため、音波は、スリット８に対向する位置に達する際に拡がり、当該位置を通過後に縮小する。すなわち、音波は、スリット８に対向する位置に達する際に、スリット８を介して空隙部９へ拡がり、当該位置を通り過ぎる際に狭められる。これにより、伝搬経路における音波が拡大して縮小する部分において、音波の反射と干渉が誘起され、音波のエネルギーが消費される。従って、送風音αは、開口部７を通過する際に低減する。このため、開口部７に反射板などの音波を遮断するための構成要素がなくとも、騒音の低減が図られる。よって、空気の流入経路が維持されて、空調能力が維持された状態で、騒音の抑制を図ることが可能になる。 According to the above configuration, the blowing noise α generated by the blower 3 propagates to the outside through the opening 7, and the noise damping portion 5 provided with the slit 8 is arranged on both sides of the opening 7. Therefore, the sound wave spreads when reaching the position facing the slit 8, and contracts after passing through the position. That is, when the sound waves reach a position opposite to the slit 8, they spread through the slit 8 to the cavity 9, and when they pass through the position, they are narrowed. As a result, reflection and interference of the sound waves are induced in the portions of the propagation path where the sound waves expand and contract, and the energy of the sound waves is consumed. Therefore, the blowing sound α is reduced when passing through the opening 7. Therefore, even if the opening 7 does not have a component such as a reflective plate for blocking sound waves, noise can be reduced. Therefore, it is possible to suppress noise while maintaining the air inflow path and maintaining the air conditioning capacity.
　実施の形態２．
　以下、実施の形態２に係る室外機１００について詳述する。なお、実施の形態２では、実施の形態１における構成要素と同様の構成要素に対し、同一の符号を付すものとする。また、実施の形態２において、実施の形態１における構成と同様の構成、および、実施の形態１における機能と同様の機能等については、特段の事情がない限り説明を省略する。 Embodiment 2.
The outdoor unit 100 according to the second embodiment will be described in detail below. In addition, in the second embodiment, the same reference numerals are given to the same components as those in the first embodiment. Furthermore, in the second embodiment, descriptions of configurations similar to those in the first embodiment, functions similar to those in the first embodiment, etc. will be omitted unless there are special circumstances.
　図４は、実施の形態２に係る消音部を例示する斜視図である。図５は、実施の形態２に係る消音部を例示する側面図である。図６は、実施の形態２に係る消音部の、異なる高さの２つの位置での水平方向における断面を例示する図である。なお、高さとは、室外機１００の設置面からの高さを意味する。図６には、図５におけるＹによって示される位置の断面と、Ｚによって示される位置の断面とが示される。図６の「Ｙ断面」とは、Ｙで示される位置の断面を指し、「Ｚ断面」は、Ｚで示される位置の断面を指す。 FIG. 4 is a perspective view illustrating a sound deadening section according to the second embodiment. FIG. 5 is a side view illustrating the muffler according to the second embodiment. FIG. 6 is a diagram illustrating cross sections in the horizontal direction at two positions at different heights of the muffling section according to the second embodiment. Note that the height means the height from the installation surface of the outdoor unit 100. FIG. 6 shows a cross section at a position indicated by Y in FIG. 5 and a cross section at a position indicated by Z. The "Y cross section" in FIG. 6 refers to the cross section at the position indicated by Y, and the "Z cross section" refers to the cross section at the position indicated by Z.
　図４および図５に示すように、実施の形態２の消音部５のスリット８を形成する縁部分のうち、空気の流入方向の上流側の縁部分である上縁部１０は、上下方向に沿って振幅が変化する波形状に形成されている。上縁部１０の振幅の方向は、空気の流入方向に平行な方向である。上縁部１０の波形状は、正弦波、矩形波、三角波、またはのこぎり波等の形状である。上縁部１０の波形状は、これらの形状を複数含んでもよい。すなわち、上縁部１０の波形状は、或る高さでは、正弦波または矩形波等の形状のうちのいずれかの形状であって、当該或る高さ以外の高さでは、当該正弦波または矩形波等の形状のうちの他の形状であってもよい。 As shown in FIGS. 4 and 5, among the edge portions forming the slits 8 of the silencer 5 of the second embodiment, the upper edge portion 10, which is the edge portion on the upstream side in the air inflow direction, is vertically It is formed into a wave shape whose amplitude changes along the line. The direction of the amplitude of the upper edge 10 is parallel to the direction of air inflow. The wave shape of the upper edge portion 10 is a sine wave, a rectangular wave, a triangular wave, a sawtooth wave, or the like. The wave shape of the upper edge portion 10 may include a plurality of these shapes. That is, the wave shape of the upper edge portion 10 is either a sine wave or a rectangular wave at a certain height, and is a sine wave at a height other than the certain height. Alternatively, other shapes such as a rectangular wave may be used.
　図６に示すように、スリット８の幅の長さは、上下方向に沿って、連続的に変化する。送風音αの周波数には様々な周波数がある。スリット８の幅の長さが連続的に変化することで、伝搬経路におけるスリット８に対向する位置を通過する様々な波長の音波の反射と干渉とが促される。このため、様々な周波数の音波のエネルギーが低減し、送風音α全体としてのエネルギーが低減する。 As shown in FIG. 6, the width of the slit 8 changes continuously along the vertical direction. There are various frequencies of the air blowing sound α. Continuously changing the width of the slit 8 promotes reflection and interference of sound waves of various wavelengths passing through positions facing the slit 8 on the propagation path. Therefore, the energy of sound waves of various frequencies is reduced, and the energy of the blowing sound α as a whole is reduced.
　以下、実施の形態２に係る室外機１００による効果について詳述する。実施の形態２の消音部５におけるスリット８を形成する縁部分のうち、空気の流入方向の上流側の縁部分である上縁部１０は、上下方向に沿って振幅が変化する波形状に形成され、振幅の方向は、空気の流入方向に平行な方向である。 Hereinafter, the effects of the outdoor unit 100 according to the second embodiment will be described in detail. Among the edge portions forming the slit 8 in the muffling section 5 of the second embodiment, the upper edge portion 10, which is the edge portion on the upstream side in the air inflow direction, is formed in a wave shape whose amplitude changes in the vertical direction. The direction of the amplitude is parallel to the direction of air inflow.
　上記構成によれば、上縁部１０が、空気の流入方向に平行な方向の振幅の波形状に形成されていることから、上下方向に沿って、スリット８の幅が連続的に変化する。様々な幅のスリット８によって、送風音αにおける様々の波長の音波の、スリット８に対向する位置の通過前後における反射と干渉とを誘起できる。よって、様々な波長の音波のエネルギーが低減可能になる。すなわち、特定の周波数の音波だけでなく、複数の幅広い周波数の音波のエネルギーが低減可能になり、消音の対象とする音波の周波数の範囲を拡大することができる。また、上記構成によれば、開口部７から空気が流入する際に、上記波形状の上縁部１０のうち、凹形状の部分である凹部と、凸形状の部分である凸部の各々から空隙部９に空気が流入するため、空隙部９において気流が乱される。そのため、溝または空洞等の気流が通過する際に発生し得る音であるキャビティ音の発生を抑制することが可能になる。また、凹部と凸部とは、スリット８の縁部分のうち、筐体１内への空気の流入方向の上流に設けられているため、空気の流入の妨げとならず、圧力損失が抑制され、空調性能の維持が可能になる。 According to the above configuration, since the upper edge portion 10 is formed in a wave shape with an amplitude in a direction parallel to the direction of air inflow, the width of the slit 8 changes continuously along the vertical direction. The slits 8 of various widths can induce reflection and interference of sound waves of various wavelengths in the blast sound α before and after passing through a position facing the slit 8. Therefore, the energy of sound waves of various wavelengths can be reduced. That is, it becomes possible to reduce the energy of not only sound waves of a specific frequency but also of sound waves of a plurality of wide range of frequencies, and it is possible to expand the range of frequencies of sound waves to be silenced. Further, according to the above configuration, when air flows in from the opening 7, the air flows from each of the concave portion, which is the concave portion, and the convex portion, which is the convex portion, of the wavy upper edge portion 10. Since air flows into the gap 9, the airflow in the gap 9 is disturbed. Therefore, it is possible to suppress the generation of cavity noise, which is the sound that may be generated when airflow passes through a groove or a cavity. Furthermore, since the concave portion and the convex portion are provided upstream of the edge portion of the slit 8 in the direction in which air flows into the housing 1, they do not impede the inflow of air and suppress pressure loss. , it becomes possible to maintain air conditioning performance.
　実施の形態３．
　以下、実施の形態３に係る室外機１００について詳述する。なお、実施の形態３では、実施の形態１～実施の形態２における構成要素と同様の構成要素に対し、同一の符号を付すものとする。また、実施の形態３において、実施の形態１～実施の形態２における構成と同様の構成、および、実施の形態１～実施の形態２における機能と同様の機能等については、特段の事情がない限り説明を省略する。 Embodiment 3.
The outdoor unit 100 according to the third embodiment will be described in detail below. Note that in the third embodiment, the same reference numerals are given to the same components as those in the first to second embodiments. Furthermore, in Embodiment 3, there are no special circumstances regarding the configuration similar to the configuration in Embodiment 1 to Embodiment 2, and the same functions as in Embodiment 1 to Embodiment 2. The explanation will be omitted as far as possible.
　図７は、実施の形態３に係る消音部の水平方向における断面を例示する図である。図７では、互いに隣接し合う２つの消音部５を示す。図８は、実施の形態３に係る２つの消音部の各々を例示する側面図である。図８では、図７に示す２つの消音部５の一方を、図７の白抜き矢印Ｄが指す方向で見た場合の状態と、図７に示す２つの消音部５の他方を、図７の白抜き矢印Ｅが指す方向で見た場合の状態とが示されている。なお、図８の（Ｄ）は、図７の白抜き矢印Ｄが指す方向で見た場合を指し、（Ｅ）は、白抜き矢印Ｅが指す方向で見た場合を指す。 FIG. 7 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the third embodiment. FIG. 7 shows two mufflers 5 adjacent to each other. FIG. 8 is a side view illustrating each of two mufflers according to the third embodiment. FIG. 8 shows the state of one of the two muffling sections 5 shown in FIG. 7 when viewed in the direction indicated by the white arrow D in FIG. 7, and the state of the other of the two muffling sections 5 shown in FIG. The state when viewed in the direction indicated by the white arrow E is shown. Note that (D) in FIG. 8 refers to the case viewed in the direction indicated by the outlined arrow D in FIG. 7, and (E) refers to the case viewed in the direction indicated by the outlined arrow E in FIG.
　図７および図８に示されるように、実施の形態３では、同じ高さにおける、当該２つの消音部５の各々のスリット８の幅は、互いに異なる。同じ高さにおいて、隣接し合う２つの消音部５のスリット８の幅が異なることによって、音響特性が、実施の形態１の場合とは異なるものになる。 As shown in FIGS. 7 and 8, in the third embodiment, the widths of the slits 8 of the two muffling sections 5 at the same height are different from each other. At the same height, the widths of the slits 8 of two adjacent muffling sections 5 are different, so that the acoustic characteristics differ from those of the first embodiment.
　図７を参照して具体的に説明すると、伝搬経路の水平方向の幅は、音波の上流側から順に、隣り合う消音部５の第１面５Ａ同士が対向する部分、左側の消音部５の第１面５Ａと右側の消音部５の壁５Ｂとが対向する部分、左右の消音部５の各々の壁５Ｂ同士が対向する部分、左側の消音部５の第１面５Ａと右側の消音部５の壁５Ｂとが対向する部分、消音部５の第１面５Ａ同士が対向する部分、で変化する。ここで、左側の消音部５の第１面５Ａと右側の消音部５の壁５Ｂとが対向する部分での伝搬経路の幅は、隣り合う消音部５の第１面５Ａ同士が対向する部分での伝搬経路の幅より大きい。また、左右の消音部５の各々の壁５Ｂ同士が対向する部分での伝搬経路の幅は、左側の消音部５の第１面５Ａと右側の消音部５の壁５Ｂとが対向する部分での伝搬経路の幅より大きい。 To explain specifically with reference to FIG. 7, the width of the propagation path in the horizontal direction is determined from the upstream side of the sound wave to the portion where the first surfaces 5A of adjacent silencing parts 5 face each other, the width of the left silencing part 5, A portion where the first surface 5A and the wall 5B of the right sound deadening section 5 face each other, a portion where the walls 5B of the left and right sound deadening sections 5 face each other, a first surface 5A of the left sound deadening section 5 and the right sound deadening section 5 and the wall 5B of the silencing section 5, and a section where the first surfaces 5A of the silencing section 5 face each other. Here, the width of the propagation path at the portion where the first surface 5A of the left silencing section 5 and the wall 5B of the right silencing section 5 face each other is the width of the propagation path at the portion where the first surfaces 5A of the adjacent silencing sections 5 face each other. is larger than the width of the propagation path at . Further, the width of the propagation path at the portion where the walls 5B of the left and right sound deadening portions 5 face each other is the width of the propagation path at the portion where the first surface 5A of the left sound deadening portion 5 and the wall 5B of the right sound deadening portion 5 face each other. is larger than the width of the propagation path.
　一方、実施の形態１～実施の形態２では、図３などに示すように、伝搬経路の幅は、音波の上流側から順に、隣り合う消音部５の第１面５Ａ同士が対向する部分、左右の消音部５の各々の壁５Ｂ同士が対向する部分、消音部５の第１面５Ａ同士が対向する部分、で変化する。従って、実施の形態３における音波の進行に従う伝搬経路の幅の推移は、実施の形態１～実施の形態２における音波の進行に従う伝搬経路の幅の推移と異なる。すなわち、実施の形態３では、実施の形態１～実施の形態２に比べ、音波の進行に伴う伝搬経路の幅の変化の回数が多い。従って、実施の形態３では、実施の形態１～実施の形態２とは異なる音響特性が得られる。 On the other hand, in Embodiments 1 and 2, as shown in FIG. 3 and the like, the width of the propagation path is determined from the upstream side of the sound wave to the portion where the first surfaces 5A of the adjacent silencing parts 5 face each other, It changes in the portion where the respective walls 5B of the left and right muffling parts 5 face each other, and in the part where the first surfaces 5A of the muffling part 5 face each other. Therefore, the change in the width of the propagation path as the sound wave progresses in the third embodiment is different from the change in the width of the propagation path as the sound wave progresses in Embodiments 1 and 2. That is, in Embodiment 3, the number of changes in the width of the propagation path as the sound wave advances is greater than in Embodiments 1 and 2. Therefore, in the third embodiment, acoustic characteristics different from those in the first and second embodiments can be obtained.
　以下、実施の形態３に係る室外機１００による効果について詳述する。実施の形態３では、室外機１００の設置面から同じ高さにおける各消音部５のスリット８の幅は、当該各消音部５に隣接する消音部５のスリット８の幅と異なる。これにより、同じ高さにおいて複数の波長の音波のエネルギーを低減することが可能になる。従って、室外機１００は、空調に必要な風量を確保しつつ、広範囲の周波数域の騒音を低減することができる。 Hereinafter, the effects of the outdoor unit 100 according to the third embodiment will be described in detail. In the third embodiment, the width of the slit 8 of each muffling section 5 at the same height from the installation surface of the outdoor unit 100 is different from the width of the slit 8 of the muffling section 5 adjacent to each muffling section 5 . This makes it possible to reduce the energy of sound waves of multiple wavelengths at the same height. Therefore, the outdoor unit 100 can reduce noise in a wide frequency range while ensuring the air volume necessary for air conditioning.
　実施の形態４．
　以下、実施の形態４に係る室外機１００について詳述する。なお、実施の形態４では、実施の形態１～実施の形態３における構成要素と同様の構成要素に対し、同一の符号を付すものとする。また、実施の形態４において、実施の形態１～実施の形態３における構成と同様の構成、および、実施の形態１～実施の形態３における機能と同様の機能等については、特段の事情がない限り説明を省略する。 Embodiment 4.
The outdoor unit 100 according to Embodiment 4 will be described in detail below. Note that in the fourth embodiment, the same reference numerals are given to the same components as those in the first to third embodiments. Furthermore, in Embodiment 4, there are no special circumstances regarding the configuration similar to the configuration in Embodiment 1 to Embodiment 3, and the same functions as in Embodiment 1 to Embodiment 3. The explanation will be omitted as far as possible.
　図９は、実施の形態４に係る消音部の水平方向における断面を例示する図である。図９では、互いに隣接し合う２つの消音部５を示す。図９に示すように、実施の形態４では、当該２つの消音部５によって形成される開口部７の幅、すなわち、当該２つの消音部５間の距離は、室外機１００の内側と外側とで異なる。以下では、室外機１００の内側の開口部７を内側開口部７Ａと記載し、外側の開口部７を外側開口部７Ｂと記載する場合もある。実施の形態４では、図９に示すように、内側開口部７Ａの幅は、外側開口部７Ｂの大きい。すなわち、２つの消音部５の間の距離のうち、当該２つの消音部５の、熱交換器２に近い側の端部での距離は、当該２つの消音部５の、熱交換器２から遠い側の端部での距離より長い。これにより、伝搬経路の幅が、音波の上流側から順に、内側開口部７Ａにおける第１面５Ａ同士が対向する部分、壁５Ｂ同士が対向する部分、外側開口部７Ｂにおける第１面５Ａ同士が対向する部分、で変化する。なお、当該第１面５Ａ同士とは、隣接し合う２つの消音部５の第１面５Ａ同士を意味し、壁５Ｂ同士とは、隣接し合う２つの消音部５の壁５Ｂ同士を意味する。壁５Ｂ同士が対向する部分での伝搬経路の幅は、内側開口部７Ａにおける第１面５Ａ同士が対向する部分での伝搬経路の幅と、外側開口部７Ｂにおける第１面５Ａ同士が対向する部分での幅よりも大きい。また、内側開口部７Ａにおける第１面５Ａ同士が対向する部分での伝搬経路の幅は、外側開口部７Ｂにおける第１面５Ａ同士が対向する部分での幅よりも大きい。 FIG. 9 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the fourth embodiment. FIG. 9 shows two mufflers 5 adjacent to each other. As shown in FIG. 9, in the fourth embodiment, the width of the opening 7 formed by the two muffling parts 5, that is, the distance between the two muffling parts 5, is the same as that between the inside and outside of the outdoor unit 100. It's different. Hereinafter, the inner opening 7 of the outdoor unit 100 may be referred to as an inner opening 7A, and the outer opening 7 may be referred to as an outer opening 7B. In the fourth embodiment, as shown in FIG. 9, the width of the inner opening 7A is greater than that of the outer opening 7B. That is, among the distances between the two silencing parts 5, the distance at the end of the two silencing parts 5 on the side closer to the heat exchanger 2 is the distance between the two silencing parts 5 from the heat exchanger 2. longer than the distance at the far end. As a result, the width of the propagation path is, in order from the upstream side of the sound wave, a portion where the first surfaces 5A of the inner opening 7A face each other, a portion where the walls 5B face each other, and a portion where the first surfaces 5A of the outer opening 7B face each other. It changes in the opposing part. Note that the first surfaces 5A mean the first surfaces 5A of two adjacent sound deadening sections 5, and the walls 5B mean the walls 5B of two adjacent sound deadening sections 5. . The width of the propagation path at the portion where the walls 5B face each other is the width of the propagation path at the portion where the first surfaces 5A of the inner opening 7A face each other, and the width of the propagation path at the portion where the first surfaces 5A of the outer opening 7B face each other. Greater than the width at the part. Further, the width of the propagation path in the portion of the inner opening 7A where the first surfaces 5A face each other is larger than the width of the portion of the outer opening 7B where the first surfaces 5A face each other.
　従って、実施の形態４における音波の進行に従う伝搬経路の幅の推移は、実施の形態１～実施の形態３における音波の進行に従う伝搬経路の幅の推移と異なる。これにより、実施の形態４では、実施の形態１～実施の形態３とは異なる音響特性が得られる。 Therefore, the change in the width of the propagation path as the sound wave progresses in the fourth embodiment is different from the change in the width of the propagation path as the sound wave progresses in Embodiments 1 to 3. As a result, in the fourth embodiment, acoustic characteristics different from those in the first to third embodiments can be obtained.
　以下、実施の形態４に係る室外機１００による効果について詳述する。実施の形態４における各消音部５と、当該各消音部５に隣接する消音部５との間の距離のうち、各消音部５の、熱交換器２に近い側の端部での距離は、各消音部５の、熱交換器２から遠い側の端部での距離より長い。すなわち、内側開口部７Ａの幅は、外側開口部７Ｂの幅よりも大きい。ここで、音波は、障害物がない場合には、音源から同心円状に広がって伝搬する。音源である送風機３により近い内側開口部７Ａに比べ、より遠い外側開口部７Ｂを狭めることによって、送風機３からの音波の反射が更に促進され、様々な周波数の音波同士が互いに打ち消し合い、減衰する。従って、室外機１００は、空調に必要な風量を確保して空調能力を維持しながら、広い周波数域の騒音を低減することができる。 Hereinafter, the effects of the outdoor unit 100 according to the fourth embodiment will be described in detail. Among the distances between each muffling section 5 and the muffling section 5 adjacent to each muffling section 5 in Embodiment 4, the distance at the end of each muffling section 5 on the side closer to the heat exchanger 2 is , is longer than the distance at the end of each muffling section 5 on the side far from the heat exchanger 2. That is, the width of the inner opening 7A is larger than the width of the outer opening 7B. Here, if there are no obstacles, the sound waves spread concentrically from the sound source and propagate. By narrowing the outer opening 7B, which is farther away than the inner opening 7A, which is closer to the air blower 3, which is the sound source, the reflection of sound waves from the air blower 3 is further promoted, and sound waves of various frequencies cancel each other out and attenuate. . Therefore, the outdoor unit 100 can reduce noise in a wide frequency range while ensuring the air volume necessary for air conditioning and maintaining air conditioning performance.
　実施の形態５．
　実施の形態５では、開口部７の水平方向と上下方向の各々の長さを、騒音分布と風速分布とに基づくものとする。以下、実施の形態５に係る室外機１００について詳述する。なお、実施の形態５では、実施の形態１～実施の形態４における構成要素と同様の構成要素に対し、同一の符号を付すものとする。また、実施の形態５において、実施の形態１～実施の形態４における構成と同様の構成、および、実施の形態１～実施の形態４における機能と同様の機能等については、特段の事情がない限り説明を省略する。 Embodiment 5.
In the fifth embodiment, the horizontal and vertical lengths of the opening 7 are determined based on the noise distribution and the wind speed distribution. The outdoor unit 100 according to the fifth embodiment will be described in detail below. In the fifth embodiment, the same reference numerals are given to the same components as those in the first to fourth embodiments. In addition, in Embodiment 5, there are no special circumstances regarding the configuration similar to the configuration in Embodiment 1 to Embodiment 4, and the same functions as in Embodiment 1 to Embodiment 4. The explanation will be omitted as far as possible.
　図１０は、実施の形態５に係る室外機を例示する正面図である。室外機１００は、上述したように送風機３が筐体１内の上部に取り付けられたトップフロー型である。当該室外機１００に流入する空気の流速は、図１０における流速分布２０によって示される。なお、流速分布２０における矢印が長いほど流速が大きい。流速分布２０が示すように、筐体１内に流入する空気流は、送風機３に近いほど速く、送風機３から遠いほど遅い。すなわち、空気の流速は上下方向において異なり、送風機３付近の高い位置における空気の流速は大きく、送風機３から離れた低い位置の空気の流速は小さい。一方、送風音αは、筐体１内において、送風機３に近い上方ほど大きく、送風機３から遠い下方ほど小さい。 FIG. 10 is a front view illustrating the outdoor unit according to the fifth embodiment. The outdoor unit 100 is a top flow type in which the blower 3 is attached to the upper part of the housing 1 as described above. The flow velocity of air flowing into the outdoor unit 100 is shown by the flow velocity distribution 20 in FIG. 10 . Note that the longer the arrow in the flow velocity distribution 20, the greater the flow velocity. As shown by the flow velocity distribution 20, the airflow flowing into the housing 1 is faster as it is closer to the blower 3 and slower as it is farther from the blower 3. That is, the flow velocity of air differs in the vertical direction, the flow velocity of air at a high position near the blower 3 is high, and the flow velocity of air at a low position away from the blower 3 is low. On the other hand, the blowing sound α is louder in the upper part of the housing 1 nearer to the blower 3, and smaller in the lower part farther from the blower 3.
　実施の形態５における複数の開口部７は、複数の消音部５と１以上の消音補助部６とによって、以下のように形成される。すなわち、複数の開口部７は、より高い位置にある開口部７が、より低い位置にある開口部７よりも、上下方向に長く、且つ、水平方向に短くなるよう、複数の消音部５と１以上の消音補助部６とによって形成される。 The plurality of openings 7 in the fifth embodiment are formed by the plurality of muffling parts 5 and one or more muffling auxiliary parts 6 as follows. That is, the plurality of openings 7 are arranged with the plurality of sound deadening parts 5 so that the openings 7 located at higher positions are longer in the vertical direction and shorter in the horizontal direction than the openings 7 located at lower positions. It is formed by one or more silencing auxiliary parts 6.
　以下、図１０に示すように開口部７が上下方向に沿って４つある場合を例に挙げて説明する。ここで、当該４つの開口部７の各々の上下方向の長さを、上方から順番に、Ｈ１、Ｈ２、Ｈ３、Ｈ４と記載する。そして、当該４つの開口部７の各々の水平方向の長さを、上方から順番に、Ｗ１、Ｗ２、Ｗ３、Ｗ４と記載する。実施の形態５では、当該４つの開口部７の各々の上下方向の長さの大小関係は、Ｈ１＞Ｈ２＞Ｈ３＞Ｈ４となる。また、実施の形態５では、当該４つの開口部７の各々の水平方向の長さの大小関係は、Ｗ１＜Ｗ２＜Ｗ３＜Ｗ４となる。 Hereinafter, a case where there are four openings 7 in the vertical direction as shown in FIG. 10 will be described as an example. Here, the length of each of the four openings 7 in the vertical direction is written as H1, H2, H3, and H4 in order from the top. The horizontal lengths of each of the four openings 7 are written as W1, W2, W3, and W4 in order from the top. In the fifth embodiment, the length relationship in the vertical direction of each of the four openings 7 is H1>H2>H3>H4. In the fifth embodiment, the horizontal length of each of the four openings 7 has a relationship of W1<W2<W3<W4.
　以下、実施の形態５に係る室外機１００による効果について述べる。実施の形態１に係る室外機１００は、１以上の消音補助部６を更に備える。１以上の消音補助部６は、空気吸込口４に設けられ、水平方向に延びる。複数の開口部７は、複数の消音部５が水平方向に空気吸込口４を区画し、且つ、１以上の消音補助部６が上下方向に空気吸込口４を区画して形成される。複数の開口部７のうち、室外機１００の設置面からより高い位置にある開口部７は、より低い位置にある開口部７よりも、上下方向に長く、且つ、水平方向において短い。 Hereinafter, the effects of the outdoor unit 100 according to the fifth embodiment will be described. The outdoor unit 100 according to the first embodiment further includes one or more silencing auxiliary parts 6. One or more auxiliary silencing parts 6 are provided at the air suction port 4 and extend in the horizontal direction. The plurality of openings 7 are formed by a plurality of muffling parts 5 horizontally dividing the air suction port 4 and one or more muffling auxiliary parts 6 dividing the air suction port 4 in the vertical direction. Among the plurality of openings 7, the openings 7 located at higher positions from the installation surface of the outdoor unit 100 are longer in the vertical direction and shorter in the horizontal direction than the openings 7 located at lower positions.
　上記構成によれば、より高い位置にある消音部５は、より低い位置にある消音部５に比べて、上下方向に長くなると共に、水平方向により多く設けられる。従って、筐体１内の上部から開口部７を介して筐体１外へ伝搬する大きな送風音αが、筐体１の上方に密集して設けられた消音部５によって低減される。一方、筐体１の下部については、消音部５の数が上部に比べて少ないため、消音部５によって空気の流入が妨げられることが抑制される。従って、筐体１の下部における圧力損失の低減と、風量の確保を図ることが可能になる。 According to the above configuration, the muffling section 5 located at a higher position is longer in the vertical direction and is provided more in the horizontal direction than the muffling section 5 located at a lower position. Therefore, the loud air blowing noise α propagating from the upper part of the housing 1 to the outside of the housing 1 through the opening 7 is reduced by the noise damping parts 5 that are densely provided above the housing 1. On the other hand, in the lower part of the casing 1, since the number of muffling parts 5 is smaller than that in the upper part, the inflow of air is prevented from being obstructed by the muffling parts 5. Therefore, it is possible to reduce the pressure loss in the lower part of the housing 1 and secure the air volume.
　実施の形態６．
　実施の形態６では、消音部５の形状を、曲率を有する形状とする。これにより、室外機１００は、空調に必要な風量を効率的に確保できる。以下、実施の形態６に係る室外機１００について詳述する。なお、実施の形態６では、実施の形態１～実施の形態５における構成要素と同様の構成要素に対し、同一の符号を付すものとする。また、実施の形態６において、実施の形態１～実施の形態５における構成と同様の構成、および、実施の形態１～実施の形態５における機能と同様の機能等については、特段の事情がない限り説明を省略する。 Embodiment 6.
In the sixth embodiment, the shape of the muffling section 5 is a shape having curvature. Thereby, the outdoor unit 100 can efficiently secure the air volume necessary for air conditioning. The outdoor unit 100 according to the sixth embodiment will be described in detail below. In the sixth embodiment, the same reference numerals are given to the same components as those in the first to fifth embodiments. In addition, in Embodiment 6, there are no special circumstances regarding the configuration similar to the configuration in Embodiment 1 to Embodiment 5, and the same functions as in Embodiment 1 to Embodiment 5. The explanation will be omitted as far as possible.
　図１１は、実施の形態６に係る消音部の水平方向における断面を例示する図である。図１１に示すように、実施の形態６の消音部５の断面は略楕円形状である。開口部７に面した消音部５の面、すなわち第１面５Ａは、断面の外周面に相当する線が、空気の流入方向の上流端５Ｃから下流端５Ｄに至る楕円弧状である。なお、開口部７は、筐体１内の熱交換器２と面しているため、消音部５における熱交換器２に面する側は、熱交換器２に平行な面で切り落とされている。スリット８は、第１面５Ａのうち、上流端５Ｃから下流端５Ｄまでの間に設けられている。換言すると、スリット８は、曲率を有する第１面５Ａに設けられている。消音部５の断面形状のうち、空気の流入方向の上流端５Ｃからスリット８に至る部分は、弧状である。なお、消音部５の断面形状としては、例えば、翼断面形状が好ましい。当該翼断面形状の消音部５の前縁は、当該消音部５において、筐体１の最も外側に位置する。 FIG. 11 is a diagram illustrating a cross section in the horizontal direction of the muffling section according to the sixth embodiment. As shown in FIG. 11, the cross section of the muffling section 5 of the sixth embodiment is approximately elliptical. The surface of the muffler 5 facing the opening 7, that is, the first surface 5A, has an elliptical arc shape in which a line corresponding to the outer peripheral surface of the cross section extends from the upstream end 5C to the downstream end 5D in the air inflow direction. Note that since the opening 7 faces the heat exchanger 2 in the housing 1, the side of the silencing part 5 facing the heat exchanger 2 is cut off in a plane parallel to the heat exchanger 2. . The slit 8 is provided between the upstream end 5C and the downstream end 5D on the first surface 5A. In other words, the slit 8 is provided on the first surface 5A having a curvature. Of the cross-sectional shape of the muffler 5, the portion from the upstream end 5C in the air inflow direction to the slit 8 has an arc shape. Note that the cross-sectional shape of the muffler 5 is preferably, for example, a blade cross-sectional shape. The front edge of the muffling section 5 having a wing cross-sectional shape is located at the outermost side of the housing 1 in the muffling section 5 .
　以下、実施の形態６に係る室外機１００による効果について述べる。消音部５の断面形状のうち、空気の流入方向の上流端５Ｃからスリット８に至る部分は弧状である。これにより、筐体１内に流入する空気に対して消音部５が抵抗体となることを抑制することができる。従って、圧力損失の更なる抑制が可能になる。よって、低騒音化と、空調性能の維持または向上との両立を図ることが可能になる。 Hereinafter, the effects of the outdoor unit 100 according to the sixth embodiment will be described. Of the cross-sectional shape of the muffling section 5, a portion from the upstream end 5C in the air inflow direction to the slit 8 is arcuate. Thereby, it is possible to prevent the muffler 5 from becoming a resistor against the air flowing into the housing 1. Therefore, further suppression of pressure loss becomes possible. Therefore, it becomes possible to achieve both noise reduction and maintenance or improvement of air conditioning performance.
　以上、実施の形態について説明したが、本開示の内容は、実施の形態に限定されるものではなく、想定しうる均等の範囲を含む。 Although the embodiments have been described above, the content of the present disclosure is not limited to the embodiments, and includes conceivable equivalent ranges.
　１　筐体、２　熱交換器、３　送風機、４　空気吸込口、５　消音部、５Ａ　第１面、５Ｂ　壁、５Ｃ　上流端、５Ｄ　下流端、６　消音補助部、７　開口部、７Ａ　内側開口部、７Ｂ　外側開口部、８　スリット、９　空隙部、１０　上縁部、２０　流速分布、１００　室外機、Ｄ、Ｅ　白抜き矢印、α　送風音、β　矢印。 1. Housing, 2. Heat exchanger, 3. Blower, 4. Air suction port, 5. Silencer, 5A, first surface, 5B, wall, 5C, upstream end, 5D, downstream end, 6. Silencer auxiliary part, 7. Opening, 7A. Inner opening. , 7B outer opening, 8 slit, 9 void, 10 upper edge, 20 flow velocity distribution, 100 outdoor unit, D, E white arrow, α blowing sound, β arrow.

Claims (6)

  1. 　空気調和機の室外機であって、
    　前記室外機の外郭を形成し、且つ、空気吸込口が形成された筐体と、
    　前記筐体内において、前記空気吸込口に対向するよう配置された熱交換器と、
    　前記筐体内に設置され、前記筐体の外部の空気を前記筐体の内部へ導く送風機と、
    　前記空気吸込口に設けられ、上下方向に延びる複数の消音部と、
    　を備え、
    　前記空気吸込口は、
    　前記複数の消音部によって複数の開口部に分けられ、
    　前記複数の消音部の各消音部は、
    　前記筐体への前記空気の流入方向に平行な第１面に、前記上下方向に延びるスリットを有し、
    　前記各消音部の水平方向の断面形状は、前記スリットを開放端とするＣ字形状を含み、
    　前記各消音部の前記スリットは、
    　前記複数の消音部のうち水平方向に隣接する消音部の前記スリットと対向する、空気調和機の室外機。     An outdoor unit of an air conditioner,
    a casing that forms an outer shell of the outdoor unit and in which an air suction port is formed;
    a heat exchanger disposed within the housing to face the air suction port;
    a blower installed in the casing and guiding air outside the casing into the inside of the casing;
    a plurality of muffling parts provided at the air suction port and extending in the vertical direction;
    Equipped with
    The air suction port is
    divided into a plurality of openings by the plurality of sound deadening parts,
    Each of the plurality of sound deadening parts is
    having a slit extending in the vertical direction on a first surface parallel to the direction of inflow of the air into the casing;
    The horizontal cross-sectional shape of each of the sound deadening parts includes a C-shape with the slit as an open end,
    The slits of each of the silencing parts are
    An outdoor unit of an air conditioner that faces the slits of horizontally adjacent sound deadening parts among the plurality of sound deadening parts.
  2. 　前記消音部における前記スリットを形成する縁部分のうち、前記空気の流入方向の上流側の縁部分である上縁部は、前記上下方向に沿って振幅が変化する波形状に形成され、前記振幅の方向は、前記空気の流入方向に平行な方向である、請求項１に記載の空気調和機の室外機。 Among the edge portions forming the slit in the noise muffling portion, the upper edge portion, which is the edge portion on the upstream side in the air inflow direction, is formed in a wave shape whose amplitude changes along the vertical direction, and the upper edge portion is formed in a wave shape whose amplitude changes along the vertical direction. The outdoor unit of an air conditioner according to claim 1, wherein the direction is parallel to the inflow direction of the air.
  3. 　前記室外機の設置面から同じ高さにおける、前記各消音部の前記スリットの幅は、前記隣接する消音部の前記スリットの幅と異なる、請求項１または請求項２に記載の空気調和機の室外機。 The air conditioner according to claim 1 or claim 2, wherein the width of the slit of each of the sound deadening parts at the same height from the installation surface of the outdoor unit is different from the width of the slit of the adjacent sound deadening part. Outdoor unit.
  4. 　前記各消音部と、前記隣接する消音部との間の距離のうち、前記各消音部の、前記熱交換器に近い側の端部での距離は、前記各消音部の、前記熱交換器から遠い側の端部での距離より長い、請求項１～請求項３のいずれか一項に記載の空気調和機の室外機。 Among the distances between each of the silencing parts and the adjacent silencing parts, the distance at the end of each of the silencing parts on the side closer to the heat exchanger is the distance between each of the silencing parts and the adjacent silencing part. The outdoor unit of an air conditioner according to any one of claims 1 to 3, wherein the distance is longer than the distance at the end on the side farthest from the air conditioner.
  5. 　前記空気吸込口に設けられ、前記水平方向に延びる１以上の消音補助部を更に備え、
    　前記送風機は、
    　前記筐体内の上部に設置され、
    　前記複数の開口部は、
    　前記複数の消音部が前記水平方向に前記空気吸込口を区画し、且つ、前記１以上の消音補助部が前記上下方向に前記空気吸込口を区画して形成され、
    　前記複数の開口部のうち、前記室外機の設置面からより高い位置にある開口部は、より低い位置にある開口部よりも、前記上下方向に長く、且つ、前記水平方向において短い、請求項１～請求項４のいずれか一項に記載の空気調和機の室外機。     further comprising one or more silencing auxiliary parts provided at the air suction port and extending in the horizontal direction,
    The blower is
    installed in the upper part of the housing,
    The plurality of openings are
    The plurality of silencing parts partition the air inlet in the horizontal direction, and the one or more auxiliary silencing parts partition the air inlet in the vertical direction,
    Among the plurality of openings, an opening located at a higher position from the installation surface of the outdoor unit is longer in the vertical direction and shorter in the horizontal direction than an opening located at a lower position. The outdoor unit of an air conditioner according to any one of claims 1 to 4.
  6. 　前記各消音部の前記断面形状のうち、前記流入方向の上流端から前記スリットに至る部分は、弧状である、請求項１～請求項５のいずれか一項に記載の空気調和機の室外機。 The outdoor unit of an air conditioner according to any one of claims 1 to 5, wherein a portion of the cross-sectional shape of each of the silencing parts from the upstream end in the inflow direction to the slit is arcuate. .
PCT/JP2022/012507 2022-03-18 2022-03-18 Outdoor unit for air conditioner WO2023175875A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4616781Y1 (en) * 1968-09-25 1971-06-11
JPH05202898A (en) * 1992-01-29 1993-08-10 Matsushita Electric Ind Co Ltd Front grill for outside machine of air conditioner
JPH08247097A (en) * 1995-03-09 1996-09-24 Toshiba Ave Corp Fan guard
JP2005221174A (en) * 2004-02-06 2005-08-18 Mitsubishi Electric Corp Outdoor machine of air conditioner
JP2007285620A (en) * 2006-04-18 2007-11-01 Mitsubishi Electric Corp Outdoor unit for refrigeration cycle device
EP3147582A1 (en) * 2015-09-28 2017-03-29 Solflex HandelsgmbH Noise damping enclosure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4616781Y1 (en) * 1968-09-25 1971-06-11
JPH05202898A (en) * 1992-01-29 1993-08-10 Matsushita Electric Ind Co Ltd Front grill for outside machine of air conditioner
JPH08247097A (en) * 1995-03-09 1996-09-24 Toshiba Ave Corp Fan guard
JP2005221174A (en) * 2004-02-06 2005-08-18 Mitsubishi Electric Corp Outdoor machine of air conditioner
JP2007285620A (en) * 2006-04-18 2007-11-01 Mitsubishi Electric Corp Outdoor unit for refrigeration cycle device
EP3147582A1 (en) * 2015-09-28 2017-03-29 Solflex HandelsgmbH Noise damping enclosure

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