JP2015100667A - Sound absorption member for home electrical product, and home electrical product - Google Patents

Sound absorption member for home electrical product, and home electrical product Download PDF

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JP2015100667A
JP2015100667A JP2013245840A JP2013245840A JP2015100667A JP 2015100667 A JP2015100667 A JP 2015100667A JP 2013245840 A JP2013245840 A JP 2013245840A JP 2013245840 A JP2013245840 A JP 2013245840A JP 2015100667 A JP2015100667 A JP 2015100667A
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absorbing member
sound absorbing
sound
fiber
base material
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JP6234189B2 (en
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藤原　奨
Susumu Fujiwara
奨 藤原
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Mitsubishi Electric Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a sound absorption member for a home electrical product which achieves both non-inflammable/flame-retardant characteristics and sound absorption characteristics, and a home electrical product.SOLUTION: A sound absorption member 100 is attached to a home electrical product and comprises base material 10 mainly composed of pulp fiber, and silicon fiber 20, where the base material 10 and silicon fiber 20 are mixed to obtain a thick fiber assembly.

Description

本発明は、振動及び騒音を発生する部品や部材を備えた例えば空気調和装置や掃除機などの家電製品の吸音部材及び家電製品に関するものである。   The present invention relates to a sound-absorbing member for home appliances such as an air conditioner and a vacuum cleaner, and home appliances including components and members that generate vibration and noise.

掃除機、洗濯機、乾燥機、冷蔵庫、換気装置及び空気調和装置などの家電製品には、モータや圧縮機などの振動及び騒音を発生する部品が搭載されている。また、換気装置及び空気調和装置などには、ダクトが接続されていることも多い。ダクトは、振動及び騒音を発生する部材になる。これらの部品や部材から発生する振動及び騒音をどのように低減するかが従来から課題となっている。また、家電製品に取り付けられる吸音部材としては、安全性向上の観点から難燃性能、不燃性能を有することが望ましい。   Home appliances such as vacuum cleaners, washing machines, dryers, refrigerators, ventilators, and air conditioners are equipped with components that generate vibration and noise, such as motors and compressors. Also, ducts are often connected to ventilation devices and air conditioning devices. The duct is a member that generates vibration and noise. Conventionally, how to reduce vibration and noise generated from these components and members has been a problem. Moreover, as a sound absorbing member attached to a household appliance, it is desirable to have a flame retardance performance and a nonflammability performance from a viewpoint of safety improvement.

そのようなものとして、「ガラス転移温度が５５〜７５℃であり、かつリン系化合物、リン酸エステル系化合物、及び窒素−リン系化合物からなる群から選択される少なくとも１種類の化合物を含むポリエステル系繊維からなる不織布シート材であって、比容積が３×１０−３〜２×１０−１ｍ３／ｋｇであり、繊維絡合部が融着一体化していない家電製品用難燃性不織布吸音シート材」が提案されている。 As such, “a polyester having at least one compound selected from the group consisting of a phosphorus compound, a phosphate ester compound, and a nitrogen-phosphorus compound, having a glass transition temperature of 55 to 75 ° C. A non-woven sheet material made of a base fiber, having a specific volume of 3 × 10 −3 to 2 × 10 −1 m 3 / kg, and a flame-retardant non-woven fabric for home appliances in which the fiber entanglement portion is not fused and integrated "Sound-absorbing sheet material" has been proposed.

特開２００６−１４４１６０号公報（例えば、実施例１）Japanese Patent Laying-Open No. 2006-144160 (for example, Example 1)

特許文献１に記載の家電製品用難燃性不織布吸音シート材では、繊維絡合部が融着一体化していないので、難燃性材料が不織布の繊維材料表面に付着させていることになる。そのために、家電製品の実機への搭載時及び材料の経年劣化により、不織布の繊維材料表面に付着させた難燃性材料が脱落し、難燃効果を減衰させて満足の難燃特性を発揮させることができないという課題があった。   In the flame-retardant nonwoven fabric sound-absorbing sheet material for home appliances described in Patent Document 1, since the fiber entangled portion is not fused and integrated, the flame-retardant material is adhered to the fiber material surface of the nonwoven fabric. For this reason, the flame-retardant material attached to the fiber material surface of the non-woven fabric falls off due to the mounting of the home appliance on the actual machine and the aging of the material, and the flame-retardant effect is attenuated to exhibit satisfactory flame-retardant characteristics. There was a problem that it was not possible.

また、特許文献１に記載の家電製品用難燃性不織布吸音シート材では、難燃性材料を不織布の繊維材料表面層に付着させているので、繊維径の所々が不均一に膨らんだ状態になっている。このことは、吸音そのものの効果を発揮させるのに必要な空気室を埋めてしまい、吸音特性そのものの低さにより、満足する吸音性能が得られない等の課題が生じていた。   Moreover, in the flame-retardant nonwoven fabric sound-absorbing sheet material for home appliances described in Patent Document 1, since the flame-retardant material is adhered to the fiber material surface layer of the nonwoven fabric, the fiber diameter is swelled unevenly. It has become. This fills an air chamber necessary for exhibiting the effect of sound absorption itself, and there has been a problem that satisfactory sound absorption performance cannot be obtained due to the low sound absorption characteristic itself.

この発明は、上述の課題を背景になされたもので、不燃・難燃特性と、吸音特性との両立を図るようにした家電製品の吸音部材及び家電製品を提供することを目的としている。   This invention was made against the background of the above-described problems, and an object thereof is to provide a sound-absorbing member for home appliances and a home appliance that are compatible with incombustibility / incombustibility characteristics and sound absorption characteristics.

本発明に係る家電製品の吸音部材は、家電製品に取り付けられる家電製品の吸音部材であって、パルプ系繊維を主成分とする基材と、珪素材料を主成分とする珪素系繊維と、を備え、前記基材と前記珪素系繊維とを混練させて厚みを有する繊維集合体としたものである。   A sound absorbing member for home appliances according to the present invention is a sound absorbing member for home appliances attached to home appliances, and includes a base material mainly composed of pulp fibers and silicon based fibers mainly composed of silicon materials. And a fiber aggregate having a thickness by kneading the base material and the silicon-based fiber.

本発明に係る家電製品は、振動及び騒音を発生する部品及び部材のうちの少なくとも１つと、前記部品及び部材のうちの少なくとも１つに取り付けられた、上記の家電製品の吸音部材と、を備えたものである。   A home appliance according to the present invention includes at least one of components and members that generate vibration and noise, and a sound absorbing member of the above-described home appliance attached to at least one of the components and members. It is a thing.

本発明に係る家電製品の吸音部材によれば、搭載した家電製品が寿命を迎えるまでの長期間に亘って本来の吸音特性を維持することができ、特別な材料や特別な製造方法を要せず低コスト化が実現される。   According to the sound absorbing member of the home appliance according to the present invention, the original sound absorbing characteristic can be maintained for a long period until the mounted home appliance reaches the end of its life, and a special material or a special manufacturing method is required. Cost reduction is realized.

本発明に係る家電製品によれば、上記の家電製品の吸音部材が搭載されているので、寿命を迎えるまでの長期間に亘って振動及び騒音が低減される。   According to the household electrical appliance according to the present invention, since the sound absorbing member of the household electrical appliance is mounted, vibration and noise are reduced over a long period until the end of the service life.

本発明の実施の形態１に係る家電製品の吸音部材を構成する基材の一部を拡大して示す概略拡大図である。It is a schematic enlarged view which expands and shows a part of base material which comprises the sound-absorbing member of the household appliances which concern on Embodiment 1 of this invention. 本発明の実施の形態１に係る家電製品の吸音部材を拡大して示す概略拡大図である。It is a schematic enlarged view which expands and shows the sound absorption member of the household appliances which concern on Embodiment 1 of this invention. 本発明の実施の形態１に係る家電製品の吸音部材の吸音特性を説明するためのグラフである。It is a graph for demonstrating the sound absorption characteristic of the sound absorption member of the household appliances which concern on Embodiment 1 of this invention. 本発明の実施の形態２に係る家電製品の吸音部材を説明するための概略断面図である。It is a schematic sectional drawing for demonstrating the sound absorption member of the household appliances which concern on Embodiment 2 of this invention. 本発明の実施の形態２に係る家電製品の吸音部材の吸音特性を説明するためのグラフである。It is a graph for demonstrating the sound absorption characteristic of the sound absorption member of the household appliances which concern on Embodiment 2 of this invention. 本発明の実施の形態３に係る家電製品に搭載される部品や部材の例を説明するための概略説明図である。It is a schematic explanatory drawing for demonstrating the example of the components and member mounted in the household appliances which concern on Embodiment 3 of this invention. 本発明の実施の形態３に係る家電製品に搭載される部品や部材の例を説明するための概略説明図である。It is a schematic explanatory drawing for demonstrating the example of the components and member mounted in the household appliances which concern on Embodiment 3 of this invention. 本発明の実施の形態３に係る家電製品に搭載される部品や部材の例を説明するための概略説明図である。It is a schematic explanatory drawing for demonstrating the example of the components and member mounted in the household appliances which concern on Embodiment 3 of this invention.

以下、図面に基づいてこの発明の実施の形態について説明する。なお、図１を含め、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。また、図１を含め、以下の図面において、同一の符号を付したものは、同一又はこれに相当するものであり、このことは明細書の全文において共通することとする。さらに、明細書全文に表わされている構成要素の形態は、あくまでも例示であって、これらの記載に限定されるものではない。   Embodiments of the present invention will be described below with reference to the drawings. In addition, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one. Further, in the following drawings including FIG. 1, the same reference numerals denote the same or equivalent parts, and this is common throughout the entire specification. Furthermore, the forms of the constituent elements shown in the entire specification are merely examples, and are not limited to these descriptions.

実施の形態１．
図１は、本発明の実施の形態１に係る家電製品の吸音部材（以下、吸音部材１００と称する）を構成する基材１０の一部を拡大して示す概略拡大図である。図２は、吸音部材１００を拡大して示す概略拡大図である。以下、図１及び図２を参照しながら、吸音部材１００について説明する。 Embodiment 1 FIG.
FIG. 1 is a schematic enlarged view showing a part of a base material 10 constituting a sound absorbing member (hereinafter referred to as a sound absorbing member 100) of a household electrical appliance according to Embodiment 1 of the present invention. FIG. 2 is a schematic enlarged view showing the sound absorbing member 100 in an enlarged manner. Hereinafter, the sound absorbing member 100 will be described with reference to FIGS. 1 and 2.

吸音部材１００は、振動及び騒音を発生する部品や部材を備えた例えば空気調和装置や掃除機などの家電製品に取り付けられる。吸音部材１００は、図１に示す基材１０に、図２に示す珪素系繊維２０を混練させて形成される。   The sound absorbing member 100 is attached to a home appliance such as an air conditioner or a vacuum cleaner provided with parts and members that generate vibration and noise. The sound absorbing member 100 is formed by kneading the silicon fiber 20 shown in FIG. 2 with the base material 10 shown in FIG.

［基材１０］
基材１０は、パルプ系繊維材料を主成分として形成されている。径を１０ミクロン前後に、繊維長を１００ミクロン前後に、それぞれ加工したパルプ系繊維材料を用意する。このパルプ系繊維材料を絡み合わせて繊維集合体を形成する。この繊維集合体を所定の厚みにすることで基材１０が完成する。基材１０は、家電製品へ搭載されるために、軽くて薄いことが要求される。そのため、基材１０の厚みは、５ｍｍ〜最大でも２０ｍｍ程度とすることが望ましい。 [Substrate 10]
The base material 10 is formed with a pulp fiber material as a main component. Prepared are pulp fiber materials having a diameter of about 10 microns and a fiber length of about 100 microns. The pulp fiber material is entangled to form a fiber assembly. The base material 10 is completed by making this fiber assembly into a predetermined thickness. The base material 10 is required to be light and thin in order to be mounted on home appliances. Therefore, the thickness of the base material 10 is desirably about 5 mm to about 20 mm at the maximum.

パルプ系繊維材料は、本来、自然界に存在する草木を原料として形成される。そのため、パルプ系繊維材料の中には、水分や酸素の搬送に必要な任意の空間が多数存在している。よって、基材１０を構成しているパルプ系繊維料の一本一本には、任意の空間（図１に示す空間Ａ）が多数存在していることになる。この空間Ａが、吸音材料として必要な特性である音響エネルギを熱消耗させるエネルギ変換空間として機能することになる。なお、空間Ａは、基材１０がパルプ系繊維材料で形成されているから存在するのであって、ＰＰ（ポリプロピレン）やＰＥＴ（ポリエチレンテフタレート）などの合成材料による繊維には存在しない。   Pulp fiber materials are originally formed from vegetation that exists in nature. Therefore, there are many arbitrary spaces necessary for transporting moisture and oxygen in the pulp fiber material. Therefore, a large number of arbitrary spaces (space A shown in FIG. 1) exist in each of the pulp-based fiber materials constituting the base material 10. This space A functions as an energy conversion space for heat-consuming acoustic energy, which is a characteristic necessary as a sound absorbing material. The space A exists because the base material 10 is formed of a pulp fiber material, and does not exist in a fiber made of a synthetic material such as PP (polypropylene) or PET (polyethylene terephthalate).

また、パルプ系繊維材料を絡み合わせた繊維集合体を任意の厚みに構成することで、繊維間にも空間（図１に示す空間Ｂ）が多数存在することになる。この空間Ｂも、吸音材料として必要な特性である音響エネルギを熱消耗させるエネルギ変換空間として機能することになる。すなわち、基材１０には、空間Ａと空間Ｂとによって、空間が複合的に存在することになる。そのため、基材１０によれば、従来からある吸音材料よりも音響エネルギを消耗させるための空間が多数存在することになるので、従来の吸音材料よりも高い吸音特性を有することになる。   Moreover, many spaces (space B shown in FIG. 1) exist between the fibers by configuring the fiber assembly in which the pulp fiber materials are entangled with each other to have an arbitrary thickness. This space B also functions as an energy conversion space that heats and exhausts acoustic energy, which is a characteristic necessary as a sound absorbing material. That is, the base material 10 has a composite space due to the space A and the space B. For this reason, according to the base material 10, there are many spaces for consuming acoustic energy as compared with the conventional sound absorbing material, and thus the sound absorbing characteristics are higher than those of the conventional sound absorbing material.

［珪素系繊維２０］
珪素系繊維２０は、珪酸塩類を主成分とする白色粗粒の砂や、天然花崗岩などの珪砂を還元した珪素などの珪素材料を主成分として形成されている。繊維状に成形加工した珪素材料を任意量用意する。この繊維状に成形加工した珪素材料を、基材１０に混錬する。これにより、吸音部材１００が完成する。珪素材料の繊維長は、基材１０の繊維長と同等以下、基材１０の繊維長の３０％程度以上の範囲とする。また、珪素材料の繊維径は、基材１０の径の半分以下とする。こうすることで、珪素系繊維２０を基材１０と混ぜやすくできる。 [Silicon fiber 20]
The silicon-based fibers 20 are mainly formed of a silicon material such as white coarse-grained sand mainly composed of silicates or silicon obtained by reducing silica sand such as natural granite. An arbitrary amount of silicon material molded into a fiber shape is prepared. The silicon material molded into the fiber shape is kneaded into the base material 10. Thereby, the sound absorbing member 100 is completed. The fiber length of the silicon material is equal to or less than the fiber length of the base material 10 and is in the range of about 30% or more of the fiber length of the base material 10. In addition, the fiber diameter of the silicon material is not more than half of the diameter of the base material 10. By doing so, the silicon fibers 20 can be easily mixed with the base material 10.

珪素材料は、難燃性(燃焼し難い性質)、不燃性(燃焼しない性質)を有している。そのため、基材１０内に珪素系繊維２０を任意量入れ込むことで、難燃及び不燃効果を発揮させることが可能になる。珪素系繊維２０の入れ込む量が多くなればなるほど、不燃効果が高くなる。したがって、珪素系繊維２０の入れ込む量は、吸音部材１００が搭載される家電製品に要求される性質に応じて決定すればよい。   Silicon materials have flame retardancy (a property that is difficult to burn) and nonflammability (a property that does not burn). Therefore, it becomes possible to exhibit a flame-retardant and non-flammable effect by inserting an arbitrary amount of the silicon-based fiber 20 into the base material 10. The more the silicon fiber 20 is inserted, the higher the incombustibility effect. Therefore, the amount of silicon fiber 20 to be inserted may be determined according to the property required for the home appliance on which sound absorbing member 100 is mounted.

［吸音部材１００の奏する効果］
図３は、吸音部材１００の吸音特性を説明するためのグラフである。図３に基づいて、吸音部材１００の奏する効果について説明する。図３では、横軸が周波数（Ｈｚ）を、縦軸が吸音率（％）を、それぞれ示している。また、図３には、吸音部材１００の周波数特性を実線Ｘ１で、従来の吸音部材の周波数特性を破線Ｙで、それぞれ示している。 [Effects produced by the sound absorbing member 100]
FIG. 3 is a graph for explaining the sound absorption characteristics of the sound absorbing member 100. Based on FIG. 3, the effect produced by the sound absorbing member 100 will be described. In FIG. 3, the horizontal axis represents frequency (Hz), and the vertical axis represents sound absorption rate (%). In FIG. 3, the frequency characteristic of the sound absorbing member 100 is indicated by a solid line X1, and the frequency characteristic of the conventional sound absorbing member is indicated by a broken line Y.

図３の実線Ｘ１から、吸音部材１００では、周波数が高くなるにつれ、吸音率が上昇していることがわかる。特に２ｋＨｚ以上の周波数においては、吸音部材１００では、吸音率が５０％を超える。一方、図３の破線Ｙから、従来の吸音部材では、周波数が高くなるにつれ、吸音率が上昇するものの、吸音率が５０％を超えるようなことはない。したがって、基材１０及び珪素系繊維２０による繊維集合体として構成される吸音部材１００によれば、幅広い周波数帯域の吸音率が、従来の吸音部材に比較して向上することになる。   It can be seen from the solid line X1 in FIG. 3 that the sound absorbing member 100 increases in sound absorbing member 100 as the frequency increases. In particular, at a frequency of 2 kHz or higher, the sound absorbing member 100 has a sound absorption rate exceeding 50%. On the other hand, from the broken line Y in FIG. 3, in the conventional sound absorbing member, although the sound absorption rate increases as the frequency increases, the sound absorption rate does not exceed 50%. Therefore, according to the sound absorbing member 100 configured as a fiber aggregate composed of the base material 10 and the silicon-based fiber 20, the sound absorption coefficient in a wide frequency band is improved as compared with the conventional sound absorbing member.

以上のように、吸音部材１００は、従来の繊維材料表面に付着させる手段とは成形方法が根本から異なり、基材１０によって吸音特性を、珪素系繊維２０によって不燃・難燃特性を、それぞれ図るようにした。そのために、吸音部材１００によれば、従来の繊維材料表面に付着させる手段のように繊維材料が増したり、実機搭載時に繊維そのものが脱落したりするような問題が発生しない。よって、吸音部材１００によれば、搭載した家電製品が寿命を迎えるまでの長期間に亘って、本来の吸音特性を維持することができる。加えて、吸音部材１００によれば、特別な材料や特別な製造方法を要しないので、低コスト化が実現される。   As described above, the sound absorbing member 100 is fundamentally different in molding method from the conventional means for adhering to the surface of the fiber material, and the sound absorbing characteristics are achieved by the base material 10 and the non-flammable and flame retardant characteristics are achieved by the silicon-based fiber 20. I did it. Therefore, according to the sound-absorbing member 100, there is no problem that the fiber material is increased like conventional means for attaching to the surface of the fiber material, or that the fiber itself is dropped when mounted on an actual machine. Therefore, according to the sound absorbing member 100, the original sound absorbing characteristics can be maintained over a long period of time until the installed home appliance reaches the end of its life. In addition, according to the sound-absorbing member 100, no special material or special manufacturing method is required, so that the cost can be reduced.

また、吸音部材１００によれば、基材１０がパルプ系繊維材料で構成されているので、パルプそのものが有している「匂い」を含んでおり、木の香りを自然発散する。そのため、基材１０からはパルプの匂いが発散し、快適性向上にも貢献する。また、吸音部材１００は、金属材料などの加工に比べて、基材１０と珪素系繊維２０とによって構成されているので、加工性がよい。さらに、吸音部材１００は、グラスウールなどで構成されていた従来の吸音部材の代用にもできるので、健康被害を著しく低減できるという効果も奏する。   Further, according to the sound absorbing member 100, since the base material 10 is made of a pulp fiber material, it contains the "smell" that the pulp itself has, and naturally emits the scent of wood. Therefore, the scent of pulp diverges from the base material 10 and contributes to improvement of comfort. Further, since the sound absorbing member 100 is constituted by the base material 10 and the silicon-based fiber 20 as compared with processing of a metal material or the like, the workability is good. Furthermore, since the sound absorbing member 100 can be used as a substitute for a conventional sound absorbing member made of glass wool or the like, there is also an effect that health damage can be significantly reduced.

実施の形態２．
図４は、本発明の実施の形態２に係る家電製品の吸音部材（以下、吸音部材１００Ａと称する）を説明するための概略断面図である。以下、図４を参照しながら、吸音部材１００Ａについて説明する。なお、図４に示す矢印は、音の伝達方向を示している。 Embodiment 2. FIG.
FIG. 4 is a schematic cross-sectional view for explaining a sound absorbing member (hereinafter referred to as a sound absorbing member 100A) of a household electric appliance according to Embodiment 2 of the present invention. Hereinafter, the sound absorbing member 100A will be described with reference to FIG. In addition, the arrow shown in FIG. 4 has shown the transmission direction of the sound.

実施の形態２に係る吸音部材１００Ａは、実施の形態１に係る吸音部材１００に加え、遮音効果を発揮できるようにしたものである。吸音部材１００Ａは、表面熱処理によって吸音部材１００を圧縮成形し、圧縮成形した吸音部材１００（以下、圧縮構造１０１と称する）を圧縮成形していない吸音部材１００の片面又は両面に貼り付けて構成する。   In addition to the sound absorbing member 100 according to the first embodiment, the sound absorbing member 100A according to the second embodiment can exhibit a sound insulating effect. The sound absorbing member 100A is formed by compression-molding the sound-absorbing member 100 by surface heat treatment, and affixing the compression-molded sound-absorbing member 100 (hereinafter referred to as the compression structure 101) to one or both surfaces of the sound-absorbing member 100 that is not compression-molded. .

遮音効果を発揮する一手段としては、遮音効果を発揮させる部材の面密度を高くするという手段がある。部材の面密度を高くすることにより、音響エネルギの透過を防ぐことができ、遮音効果を発揮できる。しかしながら、面密度の高い材料は、一般的に重くなる傾向がある。例えば、金属材料等は、面密度が高いために、遮音効果は高いが、ある周波数では遮音効果が得られないコインシデンス効果が発生する。そのため、金属材料等は、安定した遮音性能が得られるわけではなく、また比較的高い周波数でコインシデンス効果が発生するという問題も抱えている。   As one means for exhibiting the sound insulation effect, there is a means for increasing the surface density of the member that exhibits the sound insulation effect. By increasing the surface density of the member, the transmission of acoustic energy can be prevented and a sound insulation effect can be exhibited. However, materials with a high surface density generally tend to be heavy. For example, a metal material or the like has a high sound insulation effect due to its high surface density, but a coincidence effect occurs where a sound insulation effect cannot be obtained at a certain frequency. For this reason, metal materials or the like do not have a stable sound insulation performance, and also have a problem that a coincidence effect occurs at a relatively high frequency.

これに対し、圧縮構造１０１は、吸音部材１００を、表面を焼き固めつつ任意厚みに圧縮することで、面密度を上げた不織布系材料として構成する。そして、圧縮構造１０１を、吸音部材１００の片面又は両面に熱溶着させる。こうすることにより、吸音部材１００Ａは、遮音性能を有した材料として構成される。すなわち、吸音部材１００Ａでは、重量を増加させることなく、吸音性能に遮音性能をプラスした効果が得られる。なお、圧縮構造１０１を、熱硬化シートなどを用いて吸音部材１００の片面又は両面に貼り付けるようにしてもよい。   On the other hand, the compression structure 101 is configured as a nonwoven fabric material having an increased surface density by compressing the sound absorbing member 100 to an arbitrary thickness while baking the surface. Then, the compression structure 101 is thermally welded to one side or both sides of the sound absorbing member 100. By doing so, the sound absorbing member 100A is configured as a material having sound insulation performance. That is, in the sound absorbing member 100A, the effect of adding the sound insulating performance to the sound absorbing performance can be obtained without increasing the weight. Note that the compression structure 101 may be attached to one side or both sides of the sound absorbing member 100 using a thermosetting sheet or the like.

例えば、１０ｍｍの厚みに成形した吸音部材１００を、約２ｍｍ程度の厚みになるまで圧縮処理して圧縮構造１０１を形成する。これにより、天然材料としての珪素本来の素性に近い状態、つまり空気室（実施の形態１で説明した空間Ｂ）がない板状態に近くなる。よって、圧縮構造１０１では、見かけの面密度が向上した特性を有することになる。ただし、圧縮構造１０１は、本来、繊維系のために、重量が増しているわけではない。そのため、圧縮構造１０１によれば、金属材料のような重量増加はない。加えて、圧縮構造１０１によれば、空気室がない板状態に近くなるために、音響エネルギの透過を防ぐことができることになる。   For example, the compression structure 101 is formed by compressing the sound absorbing member 100 molded to a thickness of 10 mm until the thickness becomes about 2 mm. As a result, a state close to the original feature of silicon as a natural material, that is, a plate state without an air chamber (space B described in the first embodiment) is obtained. Therefore, the compression structure 101 has a characteristic that the apparent surface density is improved. However, the compression structure 101 does not necessarily increase in weight because of the fiber system. Therefore, according to the compression structure 101, there is no weight increase like a metal material. In addition, according to the compression structure 101, since it is close to a plate state without an air chamber, transmission of acoustic energy can be prevented.

圧縮構造１０１を、吸音部材１００に組み合わせる。こうすることで、吸音部材１００Ａが完成する。圧縮構造１０１を片面に貼り付けるか、両面に貼り付けるかは、搭載される家電製品の用途などに応じて決定すればよい。   The compression structure 101 is combined with the sound absorbing member 100. By doing so, the sound absorbing member 100A is completed. Whether the compression structure 101 is attached to one side or both sides may be determined according to the application of the home appliance to be mounted.

図５は、吸音部材１００Ａの吸音特性を説明するためのグラフである。図５に基づいて、吸音部材１００Ａの奏する効果について説明する。図５では、横軸が周波数（Ｈｚ）を、縦軸が吸音率（％）を、それぞれ示している。また、図５には、吸音部材１００Ａの周波数特性を破線Ｘ２示している。なお、比較のために、吸音部材１００の周波数特性（実線Ｘ１）、従来の吸音部材の周波数特性（破線Ｙ）を併せて図示している。また、図５に示す吸音部材１００Ａは、吸音部材１００の両面に圧縮構造１０１を組み合わせたものである。   FIG. 5 is a graph for explaining the sound absorption characteristics of the sound absorbing member 100A. Based on FIG. 5, an effect produced by the sound absorbing member 100 </ b> A will be described. In FIG. 5, the horizontal axis indicates the frequency (Hz), and the vertical axis indicates the sound absorption coefficient (%). In FIG. 5, the frequency characteristic of the sound absorbing member 100A is shown by a broken line X2. For comparison, the frequency characteristic of the sound absorbing member 100 (solid line X1) and the frequency characteristic of the conventional sound absorbing member (broken line Y) are also illustrated. Further, the sound absorbing member 100 </ b> A shown in FIG. 5 is a combination of the compression structure 101 on both surfaces of the sound absorbing member 100.

図５の破線Ｘ２から、吸音部材１００Ａでは、５００Ｈｚ〜２ｋＨｚの間に吸音率のピークを有しているのがわかる。なお、吸音部材１００Ａのそれ以上の周波数帯域では、吸音率が一端低下するものの、全体的に吸音部材１００の吸音率よりも高いということがわかる。特に３００Ｈｚ以上の周波数においては、吸音部材１００Ａでは、吸音率が５０％を超える。したがって、吸音部材１００Ａによれば、幅広い周波数帯域の吸音率が、従来の吸音部材に比較して向上することになるとともに、圧縮構造１０１による遮音効果も発揮する。   It can be seen from the broken line X2 in FIG. 5 that the sound absorbing member 100A has a sound absorption coefficient peak between 500 Hz and 2 kHz. Note that, in the frequency band higher than that of the sound absorbing member 100A, the sound absorption rate is once lowered, but it is found that the sound absorption rate of the sound absorbing member 100 is generally higher. In particular, at a frequency of 300 Hz or more, the sound absorbing member 100A has a sound absorption rate exceeding 50%. Therefore, according to the sound absorbing member 100A, the sound absorption rate in a wide frequency band is improved as compared with the conventional sound absorbing member, and the sound insulation effect by the compression structure 101 is also exhibited.

以上のように、吸音部材１００Ａは、実施の形態１に係る吸音部材１００の奏する効果に加え、重量増加は伴うことなく、遮音効果も発揮できる。よって、吸音部材１００Ａによれば、搭載した家電製品が寿命を迎えるまでの長期間に亘って、本来の吸音特性を維持することができるだけでなく、遮音効果も発揮する。   As described above, the sound absorbing member 100A can also exhibit a sound insulating effect without increasing the weight in addition to the effect exhibited by the sound absorbing member 100 according to the first embodiment. Therefore, according to the sound absorbing member 100A, not only can the original sound absorbing characteristics be maintained for a long period of time until the installed home appliance reaches the end of its life, but also a sound insulating effect is exhibited.

実施の形態３．
図６〜図８は、本発明の実施の形態３に係る家電製品に搭載される部品や部材の例を説明するための概略説明図である。図６〜図８に基づいて、実施の形態３に係る家電製品について説明する。実施の形態３に係る家電製品には、実施の形態１に係る吸音部材１００又は実施の形態２に係る吸音部材１００Ａが取り付けられた振動及び騒音を発生する部品や部材が搭載されている。なお、以下の説明では、便宜的に実施の形態１に係る吸音部材１００が取り付けられているものとして実施の形態３に係る家電製品について説明する。 Embodiment 3 FIG.
FIGS. 6-8 is schematic explanatory drawing for demonstrating the example of the components and member mounted in the household appliance which concerns on Embodiment 3 of this invention. Based on FIGS. 6-8, the household appliance which concerns on Embodiment 3 is demonstrated. Components and members that generate vibration and noise to which the sound absorbing member 100 according to the first embodiment or the sound absorbing member 100A according to the second embodiment is attached are mounted on the home appliance according to the third embodiment. In the following description, the home appliance according to the third embodiment will be described on the assumption that the sound absorbing member 100 according to the first embodiment is attached.

実施の形態３に係る家電製品としては、例えば空気調和装置（空気清浄機、除湿機、加湿器、換気装置なども含む）や、掃除機、送風機、洗濯機（乾燥機も含む）などがある。これらの家電製品には、振動及び騒音を発生する部品としてモータや圧縮機が搭載されていることが多い。また、これらの家電製品には、振動及び騒音を発生する部材としてダクトやホースが接続されているものもある。そのため、家電製品の振動及び騒音に対する対策も要求される。   Examples of home appliances according to Embodiment 3 include air conditioners (including air purifiers, dehumidifiers, humidifiers, and ventilators), vacuum cleaners, blowers, and washing machines (including dryers). . These home appliances are often equipped with a motor and a compressor as components that generate vibration and noise. Some of these home appliances are connected with ducts and hoses as members that generate vibration and noise. Therefore, measures against vibration and noise of home appliances are also required.

そこで、実施の形態３では、実施の形態１に係る吸音部材１００、又は、実施の形態２に係る吸音部材１００Ａを家電製品に取り付けるようにしている。図６では、振動及び騒音を発生する部品の１つとしてモータ２００Ａを例に挙げて説明する。図７では、振動及び騒音を発生する部品の１つとして圧縮機２００Ｂを例に挙げて説明する。図８では、振動及び騒音を発生する部材の１つとしてダクト２００Ｃを例に挙げて説明する。   Therefore, in the third embodiment, the sound absorbing member 100 according to the first embodiment or the sound absorbing member 100A according to the second embodiment is attached to a home appliance. In FIG. 6, the motor 200 </ b> A will be described as an example of one component that generates vibration and noise. In FIG. 7, a compressor 200B will be described as an example of one component that generates vibration and noise. In FIG. 8, a duct 200C will be described as an example of one member that generates vibration and noise.

図６に示すモータ２００Ａは、図示省略のステータとロータとを備え、空気調和装置を構成している送風機などに幅広く利用されている。モータ２００Ａは、一般的に、モータ筐体２１０で外周面が覆われている。モータ筐体２１０は、中空円筒状に形成されている。モータ筐体２１０の端部は開放されていても、閉塞されていてもよい。また、ステータは外周側に位置し、ロータは内周側に位置している。   A motor 200A shown in FIG. 6 includes a stator and a rotor (not shown), and is widely used for a blower that constitutes an air conditioner. The motor 200 </ b> A generally has an outer peripheral surface covered with a motor housing 210. The motor housing 210 is formed in a hollow cylindrical shape. The end of the motor housing 210 may be open or closed. Further, the stator is located on the outer peripheral side, and the rotor is located on the inner peripheral side.

ステータは、円筒状に形成されている。ステータは、モータ筐体の内周側の任意位置に直接的又は間接的固定される。ステータにはコイルが装着され、このコイルに流れる電流によって回転磁界を発生し、ロータを回転させるようになっている。
ロータは、ステータの内側でステータの内周面との間に隙間を空けて配置される。ロータは、磁石が設けられ、ステータに通電がされることで回転する。ロータの中心には、回転軸２１１が固定されている。
回転軸２１１は、軸受け部２１２によって回転自在に軸支されている。 The stator is formed in a cylindrical shape. The stator is fixed directly or indirectly at an arbitrary position on the inner peripheral side of the motor housing. A coil is mounted on the stator, and a rotating magnetic field is generated by a current flowing through the coil to rotate the rotor.
The rotor is disposed inside the stator with a gap between the inner peripheral surface of the stator. The rotor is provided with a magnet, and rotates by energizing the stator. A rotating shaft 211 is fixed at the center of the rotor.
The rotating shaft 211 is rotatably supported by a bearing portion 212.

ロータが回転することに伴い、ステータとロータとの磁石のギャップ間で電磁振動が発生する。加えて、モータ２００Ａからは、ロータの駆動に伴う回転振動も発生する。これらの振動は、ステータを介して、モータ筐体２１０に伝達されることになる。モータ筐体２１０に伝達された振動は、騒音となってモータ２００Ａの外部に放射される。   As the rotor rotates, electromagnetic vibration is generated between the magnet gaps of the stator and the rotor. In addition, the motor 200A also generates rotational vibration accompanying the driving of the rotor. These vibrations are transmitted to the motor casing 210 via the stator. The vibration transmitted to the motor housing 210 is radiated to the outside of the motor 200A as noise.

そこで、モータ２００Ａに吸音部材１００を搭載するようにしている。具体的には、吸音部材１００は、モータ筐体２１０の外周面全体を外側から覆うように配置される。こうすることによって、モータ２００Ａから発生する様々な振動及び騒音が吸音部材１００に入射され、吸音されることになる。実施の形態１で説明したように、吸音部材１００には２つの空間（空間Ａ、空間Ｂ）が存在している。そのため、モータ２００Ａに吸音部材１００を取り付けることによって、モータ２００Ａのロータ回転時の騒音の音響エネルギを減衰することが可能になる。   Therefore, the sound absorbing member 100 is mounted on the motor 200A. Specifically, the sound absorbing member 100 is disposed so as to cover the entire outer peripheral surface of the motor housing 210 from the outside. By doing so, various vibrations and noises generated from the motor 200A are incident on the sound absorbing member 100 and are absorbed. As described in the first embodiment, the sound absorbing member 100 has two spaces (space A and space B). Therefore, by attaching the sound absorbing member 100 to the motor 200A, it becomes possible to attenuate the acoustic energy of noise when the rotor of the motor 200A rotates.

なお、実施の形態２に係る吸音部材１００Ａをモータ２００Ａに取り付けた場合には、遮音効果も発揮することになる。圧縮構造１０１を片面に貼り付ける場合には、圧縮構造１０１がモータ筐体２１０側であってもよいし、吸音部材１００がモータ筐体２１０側であってもよい。   When the sound absorbing member 100A according to Embodiment 2 is attached to the motor 200A, a sound insulation effect is also exhibited. When affixing the compression structure 101 on one side, the compression structure 101 may be on the motor casing 210 side, and the sound absorbing member 100 may be on the motor casing 210 side.

図７に示す圧縮機２００Ｂは、図示省略の圧縮要素と駆動要素とを備え、空気調和装置に形成されている冷凍サイクルの一要素となるものである。圧縮機２００Ｂは、一般的に、圧縮機筐体（シェル）２２０で外郭が構成されている。圧縮機筐体２２０は、中空状の密閉容器として機能する。圧縮機筐体２２０の内部には、圧縮要素と駆動要素とが収容される。駆動装置は、図６で示したモータ２００Ａを含めたモータで主に構成されている。圧縮要素は、駆動要素により駆動され、冷媒などの流体を圧縮するものである。なお、圧縮機２００Ｂは、一般的に、ゴム等の弾性体で構成されている防振部２２１で支持されている。また、圧縮機２００Ｂは、スクロール型圧縮機、ロータリ型圧縮機、ベーン型圧縮機のいずれであってもよい。   A compressor 200B shown in FIG. 7 includes a compression element and a drive element (not shown), and is an element of a refrigeration cycle formed in the air conditioner. In general, the compressor 200 </ b> B is configured by a compressor housing (shell) 220. The compressor housing 220 functions as a hollow sealed container. Inside the compressor housing 220, a compression element and a drive element are accommodated. The drive device is mainly composed of motors including the motor 200A shown in FIG. The compression element is driven by the drive element and compresses a fluid such as a refrigerant. Note that the compressor 200B is generally supported by a vibration isolator 221 that is formed of an elastic body such as rubber. In addition, the compressor 200B may be any of a scroll compressor, a rotary compressor, and a vane compressor.

駆動要素を構成しているロータが回転することに伴い、ステータとロータとの磁石のギャップ間で電磁振動が発生する。加えて、駆動要素からは、ロータの駆動に伴う回転振動も発生する。さらに、圧縮要素から、流体の圧縮に伴う振動が発生する。これらの振動は、駆動要素を構成しているステータ、圧縮要素が固定されているフレームを介して、圧縮機筐体２２０に伝達されることになる。圧縮機筐体２２０に伝達された振動は、騒音となって圧縮機２００Ｂの外部に放射される。   As the rotor constituting the drive element rotates, electromagnetic vibration is generated between the magnet gaps of the stator and the rotor. In addition, rotational vibration accompanying the driving of the rotor is also generated from the driving element. Furthermore, vibration accompanying compression of the fluid is generated from the compression element. These vibrations are transmitted to the compressor housing 220 via the stator constituting the drive element and the frame on which the compression element is fixed. The vibration transmitted to the compressor housing 220 is radiated to the outside of the compressor 200B as noise.

そこで、圧縮機２００Ｂに吸音部材１００を搭載するようにしている。具体的には、吸音部材１００は、圧縮機筐体２２０の外周面全体を外側から覆うように配置される。こうすることによって、圧縮機２００Ｂから発生する様々な振動及び騒音が吸音部材１００に入射され、吸音されることになる。実施の形態１で説明したように、吸音部材１００には２つの空間（空間Ａ、空間Ｂ）が存在している。そのため、圧縮機２００Ｂに吸音部材１００を取り付けることによって、圧縮機２００Ｂの駆動時の騒音の音響エネルギを減衰することが可能になる。   Therefore, the sound absorbing member 100 is mounted on the compressor 200B. Specifically, the sound absorbing member 100 is disposed so as to cover the entire outer peripheral surface of the compressor housing 220 from the outside. By doing so, various vibrations and noises generated from the compressor 200B are incident on the sound absorbing member 100 and are absorbed. As described in the first embodiment, the sound absorbing member 100 has two spaces (space A and space B). Therefore, by attaching the sound absorbing member 100 to the compressor 200B, it is possible to attenuate the acoustic energy of noise when the compressor 200B is driven.

なお、実施の形態２に係る吸音部材１００Ａを圧縮機２００Ｂに取り付けた場合には、遮音効果も発揮することになる。圧縮構造１０１を片面に貼り付ける場合には、圧縮構造１０１が圧縮機筐体２２０側であってもよいし、吸音部材１００が圧縮機筐体２２０側であってもよい。   In addition, when the sound absorbing member 100A according to Embodiment 2 is attached to the compressor 200B, a sound insulation effect is also exhibited. When affixing the compression structure 101 on one side, the compression structure 101 may be on the compressor housing 220 side, and the sound absorbing member 100 may be on the compressor housing 220 side.

図８に示すダクト２００Ｃは、空気調和装置等の家電製品に接続され、家電製品から排出される空気等の気体を導通させるものである。ダクト２００Ｃでは、内部を導通している気体によって共鳴現象が起こることがある。共鳴現象が起こると、それが振動及び騒音となってダクト２００Ｃの外部に放射される。   A duct 200 </ b> C illustrated in FIG. 8 is connected to a home appliance such as an air conditioner, and conducts a gas such as air discharged from the home appliance. In the duct 200 </ b> C, a resonance phenomenon may occur due to the gas conducting inside. When the resonance phenomenon occurs, it is radiated to the outside of the duct 200C as vibration and noise.

そこで、図８に示すように、ダクト２００Ｃの外周に吸音部材１００を搭載するようにしている。具体的には、吸音部材１００は、ダクト２００Ｃの外周面全体を外側から覆うように配置される。こうすることによって、ダクト２００Ｃから発生する振動及び騒音が吸音部材１００に入射され、吸音されることになる。実施の形態１で説明したように、吸音部材１００には２つの空間（空間Ａ、空間Ｂ）が存在している。そのため、モータ２００Ａに吸音部材１００を取り付けることによって、モータ２００Ａのロータ回転時の騒音の音響エネルギを減衰することが可能になる。   Therefore, as shown in FIG. 8, the sound absorbing member 100 is mounted on the outer periphery of the duct 200C. Specifically, the sound absorbing member 100 is disposed so as to cover the entire outer peripheral surface of the duct 200C from the outside. By doing so, vibration and noise generated from the duct 200 </ b> C are incident on the sound absorbing member 100 and are absorbed. As described in the first embodiment, the sound absorbing member 100 has two spaces (space A and space B). Therefore, by attaching the sound absorbing member 100 to the motor 200A, it becomes possible to attenuate the acoustic energy of noise when the rotor of the motor 200A rotates.

なお、実施の形態２に係る吸音部材１００Ａをダクト２００Ｃに取り付けた場合には、遮音効果も発揮することになる。また、図８では、ダクト２００Ｃの外周全周に吸音部材１００を取り付けた場合を例に示したが、ダクト２００Ｃの設置位置によって、上面に吸音部材１００を取り付けたり、下面に吸音部材１００を取り付けたり、側面に吸音部材１００を取り付けたり、適宜決定すればよい。さらに、吸音部材１００をダクト２００Ｃの内周側に取り付けるようにしてもよい。   In addition, when the sound absorbing member 100A according to Embodiment 2 is attached to the duct 200C, a sound insulation effect is also exhibited. 8 shows an example in which the sound absorbing member 100 is attached to the entire outer periphery of the duct 200C. However, depending on the installation position of the duct 200C, the sound absorbing member 100 is attached to the upper surface or the sound absorbing member 100 is attached to the lower surface. The sound absorbing member 100 may be attached to the side surface, or may be determined as appropriate. Further, the sound absorbing member 100 may be attached to the inner peripheral side of the duct 200C.

以上のように、実施の形態３に係る家電製品によれば、実施の形態１に係る吸音部材１００又は実施の形態２に係る吸音部材１００Ａが搭載されているので、寿命を迎えるまでの長期間に亘って振動及び騒音が低減される。   As described above, according to the home appliance according to the third embodiment, since the sound absorbing member 100 according to the first embodiment or the sound absorbing member 100A according to the second embodiment is mounted, a long period until the end of the service life is reached. Vibration and noise are reduced over the entire period.

なお、実施の形態３では、吸音部材１００又は吸音部材１００Ａのいずれかを搭載した場合を例に説明したが、家電製品の用途に応じて、吸音部材１００又は吸音部材１００Ａのいずれかを選定すればよい。また、実施の形態３では、振動及び騒音が発生する部品、部材に直接的に吸音部材１００を取り付けた場合を例に説明したが、吸音部材１００の取り付けの仕方を直接的なものに限定するものではない。例えば、掃除機など、本体が移動するようなものにおいては、内部に搭載されているモータの周囲に吸音部材１００を取り付けるだけでなく、本体の底面やホースの外周又は内周に吸音部材１００を取り付けるようにしてもよい。   In the third embodiment, the case where either the sound absorbing member 100 or the sound absorbing member 100A is mounted has been described as an example. However, depending on the use of the home appliance, either the sound absorbing member 100 or the sound absorbing member 100A is selected. That's fine. In the third embodiment, the case where the sound absorbing member 100 is directly attached to a component or member that generates vibration and noise has been described as an example. However, the method of attaching the sound absorbing member 100 is limited to a direct one. It is not a thing. For example, in a case where the main body moves, such as a vacuum cleaner, not only the sound absorbing member 100 is attached around the motor mounted inside, but the sound absorbing member 100 is attached to the bottom surface of the main body or the outer periphery or inner periphery of the hose. You may make it attach.

１０ 基材、２０ 珪素系繊維、１００ 吸音部材、１００Ａ 吸音部材、１０１ 圧縮構造、２００Ａ モータ、２００Ｂ 圧縮機、２００Ｃ ダクト、２１０ モータ筐体、２１１ 回転軸、２１２ 軸受け部、２２０ 圧縮機筐体、２２１ 防振部、Ａ 空間、Ｂ 空間。   10 base material, 20 silicon-based fiber, 100 sound absorbing member, 100A sound absorbing member, 101 compression structure, 200A motor, 200B compressor, 200C duct, 210 motor housing, 211 rotating shaft, 212 bearing portion, 220 compressor housing, 221 Anti-vibration part, A space, B space.

Claims (6)

家電製品に取り付けられる家電製品の吸音部材であって、
パルプ系繊維を主成分とする基材と、
珪素材料を主成分とする珪素系繊維と、を備え、
前記基材と前記珪素系繊維とを混練させて厚みを有する繊維集合体とした
家電製品の吸音部材。 A sound absorbing member for home appliances attached to home appliances,
A base material mainly composed of pulp fibers;
A silicon-based fiber mainly composed of a silicon material,
A sound-absorbing member for home appliances, wherein the base material and the silicon-based fiber are kneaded to form a fiber assembly having a thickness. 前記繊維集合体を圧縮成形した圧縮構造を、
圧縮成形していない前記繊維集合体の少なくとも片面に貼り付けた
請求項１に記載の家電製品の吸音部材。 A compression structure obtained by compression-molding the fiber assembly,
The sound-absorbing member for home appliances according to claim 1, wherein the sound-absorbing member is attached to at least one surface of the fiber assembly that is not compression-molded. 前記圧縮構造は、
前記繊維集合体を表面熱処理することによって成形される
請求項２に記載の家電製品の吸音部材。 The compression structure is
The sound-absorbing member for home appliances according to claim 2, which is formed by subjecting the fiber assembly to surface heat treatment. 振動及び騒音を発生する部品及び部材のうちの少なくとも１つと、
前記部品及び部材のうちの少なくとも１つに取り付けられた、請求項１〜３のいずれか一項に記載の家電製品の吸音部材と、を備えた
家電製品。 At least one of parts and members that generate vibration and noise;
A home appliance, comprising: a sound absorbing member for home appliances according to any one of claims 1 to 3, which is attached to at least one of the parts and members. 前記部品が、モータ又は圧縮機である
請求項４に記載の家電製品。 The household appliance according to claim 4, wherein the component is a motor or a compressor. 前記部材が、ダクトである
請求項４に記載の家電製品。 The household appliance according to claim 4, wherein the member is a duct.
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