【発明の詳細な説明】[Detailed description of the invention]
〔産業上の利用分野〕
本発明は、エアコンデイシヨナー屋外機の防音
対策に関し、詳細には、立体成形した２層構造の
防音材により特定部分を被覆することにより防音
対策をなすエアコンデイシヨナー用防音材に関す
る。
〔従来の技術〕
従来、エアコンデイシヨナー屋外機の防音対策
としては、立体成形しない状態の平物の吸音材、
遮音材を個別にエアコンデイシヨナー屋外機内部
側壁等の所望部位に粘着したり、空〓部に充填す
る方法や立体成形しない状態の吸音材を遮音材と
一体化し、まるめて端部を縫いあわせ、筒状とな
し、立体成形しない状態の吸音材を圧縮機、アキ
ユームレータにかぶせる等の方法によつていた。
〔発明が解決しようとする問題点〕
しかしながらこのような防音対策にあつては防
音材の総部品点数が５〜６点にも及び取り付け作
業が非常に煩雑であり、特にシール性が悪く、騒
音が漏れ防音効果に劣り、更にコストも高くつく
という欠点を有していた。
〔問題点を解決するための手段〕
そこで本発明者らは、立体成形した１つ又は２
つの防音材を使用し、従来の５〜６点の防音材と
同等以上の防音効果を得、更には取り付け作業性
をも軽減せんと鋭意研究の結果、従来の立体成形
しない状態の防音材をまるめて縫いあわせただけ
の簡易なものから、吸音材および遮音材の２層構
造からなる防音材を適用部位の形状にあわせて一
体成形、立体加工し、吸音材が内側となるように
一方開口の筒状となしたものをエアコンデイシヨ
ナー屋外機中の圧縮機、アキユームレータの少な
くとも一方を被覆することにより、従来の５〜６
部品の防音材に優る防音効果を得ることを知見
し、本発明に至つた。
本発明になる吸音材としては、植物性、動物
性、鉱物性、合成樹脂性の繊維成分の１種以上と
合成樹脂性結合材、難燃剤等からなる嵩高性不織
布、フエルト及びウレタン、塩化ビニル等の合成
樹脂性フオーム材等が使用できる。
本発明になる遮音材としては、アスフアルト、
ゴム、合成樹脂等のバインダー成分の１種以上と
充填材成分、添加剤類を混練し、圧延してなるシ
ート状物を使用する。
かかる遮音材と吸音材からなる２層構造一体化
物を圧縮機、アキユームレータの少なくとも一方
に使用することを必須とし、かかる構造の防音材
となすことによつて初めて所望の効果を得ること
ができるのである。
一体化方法としては、金型に吸音材及び遮音材
を載置後、圧縮成形する方法、インジエクシヨン
モールドに遮音材を載置後フオーム材成分を注入
発泡せしめる方法等がある。
かかる方法により立体成形した防音材を吸音材
が内側となるように筒状とし、重なる部分を接着
せしめ一方開口の筒状にせしめる。その際、重な
り部分の吸音材を取り除き遮音材同士を接触一体
化せしめればよりシール性に優れた立体成形防音
材となし得る。
筒状となした立体成形防音材は、支持部材を有
する圧縮機のエアコンデイシヨナー屋外機の内部
構造からして、支持部材をも覆う形状となすよう
に設計すること、及び圧縮機やアキユームレータ
に接触する形状となすことは防音効果の点で好ま
しいことである。更に開口部末端部分は吸音材を
遮音材より長く設計することにより吸音材にエア
コンデイシヨナー屋外機底面部分との緩衝材の働
きを付与し、振動を遮断するため好ましいことで
ある。
〔実施例〕
以下に実施例を挙げ、本発明をより詳細に説明
する。いうまでもなく本発明は以下の実施例のみ
に拘束されるものではない。
実施例
ブチルゴム10重量部、ストレートアスフアルト
20重量部、ブロンアスフアルト25重量部、炭酸カ
ルシウム25重量部及びタルク20重量部を混練し、
1.5mm厚に押出し成形し、遮音材となした。吸音
材としては、反毛60重量部、落綿10重量部、合成
繊維５重量部、フエノール樹脂粉末25重量部及び
ポリリン酸塩（難燃剤）２重量部よりなるフリー
スを形成し、140℃の加熱炉に導入し、厚さ15mm、
面密度600ｇ／m2の嵩高性不織布を得た。
上記遮音材を加熱軟化させた後、上記吸音材と
ともに下金型上に載置して加熱しつつ、圧縮立体
成形した。
立体成形した防音材を吸音材が内側となるよう
に一方開口の筒状とし、重なる部分を接着せし
め、一方開口の筒状立体成形体となし、圧縮機及
びアキユームレータを被覆する如く装着した。
比較例
エアコンデイシヨナー屋外機中の内部側壁に４
個所フエルト材を貼着し、更に圧縮機にフエルト
を筒状にまるめた立体成形のない状態の吸音材を
かぶせ、天板を上に載せた６点からなる防音対策
を施した。
試験方法
室温30℃以上の部屋に設置したエアコンデイシ
ヨナー屋内機のコントロールを冷房16℃に合わ
せ、入力する。入力後５分間放置し、エアコンデ
イシヨナー屋外機の騒音を評価した。
[Industrial Field of Application] The present invention relates to soundproofing measures for outdoor units of air conditioners, and more particularly, to soundproofing measures for air conditioner units in which specific parts are covered with three-dimensionally molded two-layer structure soundproofing material. Regarding soundproofing materials for speakers. [Conventional technology] Conventionally, as soundproofing measures for outdoor air conditioner units, flat sound absorbing materials without three-dimensional molding,
The sound insulation material can be individually adhered to desired parts such as the inner side wall of the outdoor unit of the air conditioner, or the sound absorbing material without three-dimensional molding can be integrated with the sound insulation material, rolled up and sewn at the edges. In addition, a method such as covering the compressor or accumulator with a cylindrical sound absorbing material without three-dimensional molding was used. [Problems to be solved by the invention] However, in the case of such soundproofing measures, the total number of parts of the soundproofing material is 5 to 6, and the installation work is extremely complicated.In particular, the sealing performance is poor, and the noise However, it has the disadvantage that it has poor soundproofing effect and is also expensive. [Means for solving the problem] Therefore, the present inventors have developed three-dimensional molded one or two
As a result of intensive research, we decided to use three-dimensional soundproofing materials to achieve a soundproofing effect equal to or better than the conventional five to six-piece soundproofing materials, and also to reduce installation work efficiency. From a simple product that is just rolled up and sewn together, to a two-layer structure of sound-absorbing material and sound-insulating material, it is integrally molded and three-dimensionally processed to match the shape of the area to which it will be applied, and one side is opened so that the sound-absorbing material is on the inside. By covering at least one of the compressor and accumulator in the outdoor air conditioner unit with a cylindrical shape, the conventional 5 to 6
It was discovered that a soundproofing effect superior to that of soundproofing materials for parts can be obtained, leading to the present invention. The sound absorbing material of the present invention includes bulky nonwoven fabrics, felts, urethane, vinyl chloride, etc. made of one or more of vegetable, animal, mineral, and synthetic resin fiber components, synthetic resin binders, flame retardants, etc. Synthetic resin foam materials such as, etc. can be used. As the sound insulation material according to the present invention, asphalt,
A sheet-like product is used, which is obtained by kneading one or more binder components such as rubber and synthetic resin, filler components, and additives, and rolling the mixture. It is essential to use such an integrated two-layer structure consisting of a sound insulating material and a sound absorbing material in at least one of the compressor and the accumulator, and it is only by using the sound insulating material with such a structure that the desired effect can be obtained. It can be done. Examples of the integration method include a method in which a sound absorbing material and a sound insulating material are placed in a mold and then compression molded, and a method in which a sound insulating material is placed in an injection mold and then a foam material component is injected and foamed. The soundproofing material three-dimensionally molded by this method is made into a cylinder shape with the sound absorbing material on the inside, and the overlapping portions are glued to form a cylinder shape with one opening open. At that time, if the sound absorbing material in the overlapping portion is removed and the sound insulating materials are brought into contact with each other and integrated, a three-dimensional molded sound insulating material with better sealing performance can be obtained. Considering the internal structure of the compressor air conditioner outdoor unit that has a support member, the cylindrical three-dimensional molded soundproofing material should be designed to cover the support member as well. It is preferable from the point of view of soundproofing effect that the shape is in contact with the humerator. Furthermore, by designing the sound absorbing material to be longer than the sound insulating material at the end of the opening, it is preferable to provide the sound absorbing material with the function of a buffering material between the bottom surface of the outdoor unit of the air conditioner and to isolate vibrations. [Example] The present invention will be explained in more detail with reference to Examples below. Needless to say, the present invention is not limited only to the following examples. Example 10 parts by weight of butyl rubber, straight asphalt
20 parts by weight, 25 parts by weight of blown asphalt, 25 parts by weight of calcium carbonate, and 20 parts by weight of talc,
It was extruded to a thickness of 1.5mm and used as a sound insulation material. As a sound absorbing material, a fleece was formed from 60 parts by weight of recycled wool, 10 parts by weight of fallen cotton, 5 parts by weight of synthetic fibers, 25 parts by weight of phenol resin powder, and 2 parts by weight of polyphosphate (flame retardant). Introduced into heating furnace, thickness 15mm,
A bulky nonwoven fabric with an areal density of 600 g/m 2 was obtained. After the sound insulating material was heated and softened, it was placed on a lower mold together with the sound absorbing material, and compression molded three-dimensionally while heating. The three-dimensionally molded soundproofing material was made into a cylindrical shape with one opening so that the sound-absorbing material was on the inside, and the overlapping parts were glued together to form a cylindrical three-dimensional molded body with one opening, which was installed to cover the compressor and accumulator. . Comparative example: 4 on the internal side wall of an outdoor air conditioner unit.
We applied soundproofing measures consisting of six points: we pasted felt material in certain places, covered the compressor with sound absorbing material made of felt rolled into a cylindrical shape without three-dimensional molding, and placed a top plate on top. Test method Set the control of the air conditioner indoor unit installed in a room with a room temperature of 30°C or higher to a cooling temperature of 16°C, and enter the input. After inputting the data, it was left for 5 minutes and the noise of the outdoor unit of the air conditioner was evaluated.
〔発明の効果〕〔Effect of the invention〕
2dB程度の騒音低減があれば、効果があるとさ
れるところ、本発明になる防音材によれば、従来
の防音対策と比べて各周波数で３〜5dBの騒音を
低減することが明らかとなつた。
It is said that a noise reduction of about 2 dB is effective, but the soundproofing material of the present invention has been shown to reduce noise by 3 to 5dB at each frequency compared to conventional soundproofing measures. Ta.
【図面の簡単な説明】[Brief explanation of drawings]
第１図は圧縮機及びアキユームレータの双方を
同時に被覆した立体成形防音材断面図、第２図は
Ａ部拡大図、第３図はエアコンデイシヨナー屋外
機の内部略図。
１：吸音材、２：遮音材、３：圧縮機、４：ア
キユームレータ、５：フアン。
Fig. 1 is a sectional view of the three-dimensionally molded soundproofing material covering both the compressor and the accumulator at the same time, Fig. 2 is an enlarged view of part A, and Fig. 3 is a schematic diagram of the interior of the outdoor unit of the air conditioner. 1: Sound absorbing material, 2: Sound insulating material, 3: Compressor, 4: Accumulator, 5: Fan.