WO2012161695A1 - Machine isolée acoustiquement - Google Patents

Machine isolée acoustiquement Download PDF

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Publication number
WO2012161695A1
WO2012161695A1 PCT/US2011/037701 US2011037701W WO2012161695A1 WO 2012161695 A1 WO2012161695 A1 WO 2012161695A1 US 2011037701 W US2011037701 W US 2011037701W WO 2012161695 A1 WO2012161695 A1 WO 2012161695A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulation member
dense
sound absorbing
layers
cabinet
Prior art date
Application number
PCT/US2011/037701
Other languages
English (en)
Inventor
Anthony Lee ROCKWELL
Gordon BRUCH
Phil Johnson
Original Assignee
Owens Corning Intellectual Capital, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Owens Corning Intellectual Capital, Llc filed Critical Owens Corning Intellectual Capital, Llc
Priority to PCT/US2011/037701 priority Critical patent/WO2012161695A1/fr
Publication of WO2012161695A1 publication Critical patent/WO2012161695A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/12—Casings; Tubs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4209—Insulation arrangements, e.g. for sound damping or heat insulation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches

Definitions

  • This invention relates in general to acoustically insulated machines. More particularly, this invention pertains to noise generating machines that are acoustically insulated with a multi-layer sound absorbing member or assembly.
  • Appliances and other machines that generate noise are usually provided with acoustical insulation to reduce the levels of emanating sound.
  • the unwanted sound from these machines can be caused both by the mechanical operation of the motor or other mechanical component within the machine and by the vibration of the machine itself.
  • excessive noise may be generated by dishwashers, clothes washers, clothes dryers, refrigerators, freezers, and microwave ovens, which can be annoying to inhabitants of the dwelling.
  • a typical form of acoustical insulation is a layer of mineral fiber insulation, such as fiberglass insulation, wrapped around or positioned around the source of unwanted noise.
  • a fiberglass absorber is usually incorporated in the front door panel of an under-the-counter dishwasher. The blanket of glass fibers absorbs some of the sound energy entering the fiberglass absorber, thereby resulting in a reduced transmission of unwanted sound from the source of sound in the appliance.
  • the insertion of a reflecting sound barrier within the acoustical insulation also reduces the sound transmission through the insulation product.
  • Thermoplastic blanket materials are well known in the art. Such materials have been utilized as acoustical and thermal insulators and liners for application to appliances. These insulators and liners typically rely upon both sound absorption, i.e. the ability to absorb incident sound waves and transmission loss, i.e. the ability to reflect incident sound waves, in order to provide sound attenuation.
  • An example of a multilayer thermoplastic blanket having densified layers is disclosed by U.S. Patent No. 7,357,974, which is incorporated herein by reference in its entirety.
  • the present application discloses exemplary embodiments of acoustically insulated machines.
  • One such acoustically insulated machine has an internal source of noise and an insulation member.
  • the insulation member may include a plurality of porous, sound absorbing layer and a plurality of dense or facing layers.
  • the dense or facing layers each have a density that is greater than the densities of the sound absorbing layers.
  • the insulation member may be oriented such that one of the dense or facing layers faces toward said internal source of noise.
  • the insulation member may be configured such that most of the sound energy in a low frequency range, such as 100 to 800 Hz, generated by the internal source of noise is not reflected back into the machine.
  • a dense or facing layer that faces toward the source of noise may be configured to allow a majority of acoustic airborne energy in the low frequency range from the internal source of noise to pass into the dense or facing layer and the sound absorbing layer. That is, less than 50% of the acoustic airborne energy from the internal source of noise in the low frequency range is reflected by the dense or facing layer.
  • the acoustically insulated machines may take a wide variety of different forms.
  • the acoustically insulated machine may be a clothes washing machine, a dishwasher, an air conditioner, a microwave oven, or any other household machine or appliance that makes noise.
  • an acoustically insulated washing machine may include a cabinet, a washing assembly, a motor, and an acoustic insulation member.
  • the cabinet may have a front or top opening for accepting clothes and a bottom opening.
  • the washing assembly is disposed in the cabinet and is configured to accept clothes to be washed by the washing machine through the front or top opening.
  • the motor assembly is disposed in the cabinet and is coupled to the washing assembly for operating the washing assembly.
  • the acoustic insulation member may be disposed in the bottom opening of the cabinet.
  • the acoustic insulation element is soft and flexible, such that the acoustic insulation member is assembled with the cabinet by folding up and/or compressing the acoustic insulation member, placing the acoustic insulation member in the bottom opening of the cabinet, and unfolding and/or decompressing the insulation member such that the acoustic insulation member engages the bottom opening.
  • the acoustic insulation member may engage a lip portion of the bottom opening. The engagement of the lip by the acoustic insulation member retains the acoustic insulation member in the bottom opening.
  • An acoustically insulated dishwasher may include a housing, a pump, a drive motor, a plate closing a front side of the housing, and an insulation member.
  • the housing may include a washing chamber and an access door.
  • a plurality of legs may support the housing.
  • the pump and drive motor may be provided in a cavity between the legs and below the housing.
  • the plate closes a front side of the cavity.
  • the insulation member is disposed between the plate and the pump and drive motor.
  • the insulation member may be oriented such that an outer dense or facing layer faces toward the pump and drive motor.
  • the outer dense or facing layer may be configured to allow a majority of sound energy in a low frequency range, such as 100 to 800 Hz, from the pump and drive motor to pass into the dense or facing layer and the first sound absorbing layer.
  • FIG. 1 is a schematic illustration of an exemplary embodiment of an acoustically insulated machine
  • FIG. 2 A is a schematic illustration of a multi-layer acoustic insulation member
  • FIG. 2B is a schematic illustration of a multi-layer acoustic insulation member
  • FIG. 2C is a schematic illustration of a single layer acoustic insulation member
  • Fig. 3 is a graph illustrating sound absorption performance of acoustic insulation members
  • FIG. 4 is a schematic illustration of an exemplary embodiment of an acoustically insulated machine having a multi-layer acoustic insulation member
  • FIG. 5 is a schematic illustration of an exemplary embodiment of an acoustically insulated machine having a multi-layer acoustic insulation member
  • FIG. 6 is a schematic illustration of an exemplary embodiment of an acoustically insulated machine having a multi-layer acoustic insulation member
  • FIG. 7 is a schematic illustration of an exemplary embodiment of an acoustically insulated machine having a multi-layer acoustic insulation member
  • FIG. 8 is a schematic illustration of an exemplary embodiment of an acoustically insulated machine having a multi-layer acoustic insulation member
  • FIG. 9 is a schematic illustration of an exemplary embodiment of an acoustically insulated machine having a multi-layer acoustic insulation member
  • FIG. 10 is a schematic illustration of an exemplary embodiment of an acoustically insulated machine having a multi-layer acoustic insulation member
  • FIG. 11A is a schematic illustration of an exemplary embodiment of an acoustic insulation member having two porous, sound absorbing layers and two dense or facing layers;
  • Fig. 11B is a schematic illustration of an exemplary embodiment of an acoustic insulation member having three porous, sound absorbing layers and three dense or facing layers;
  • FIG. 12 is a schematic illustration of an exemplary embodiment of an acoustically insulated washing machine
  • FIG. 13 is a schematic illustration of an acoustic insulation member being installed in a bottom opening of a washing machine
  • FIG. 14 is a schematic illustration of an acoustic insulation member of Fig. 13 installed in the bottom opening of the washing machine;
  • FIG. 15 is a schematic illustration of an exemplary embodiment of an acoustically insulated washing machine where the acoustic insulation member is spaced apart from the floor;
  • FIG. 16 is a schematic illustration of an exemplary embodiment of an acoustically insulated washing machine where the acoustic insulation member is in contact with the floor;
  • FIG. 17 is a perspective view of a dishwasher installed in kitchen cabinetry
  • FIG. 18 is a perspective view of an exemplary embodiment of an acoustically insulated dishwasher.
  • Fig. 19 is an illustration of a kick plate and acoustic insulation of an exemplary embodiment of an acoustically insulated dishwasher.
  • the present application discloses exemplary embodiments of acoustically insulated machines 10.
  • one such acoustically insulated machine 10 has an internal source of noise 14 and an insulation member 16.
  • the insulation member 16 absorbs sound energy 17 generated by internal source of noise 14 to make the machine 12 quieter.
  • the machine includes a cabinet 18 or housing and the insulation member 16 is disposed inside the cabinet 18.
  • the insulation member may be disposed outside of the cabinet 18 in other embodiments.
  • the insulation member 16 may take a wide variety of different forms.
  • the insulation member 16 includes a plurality of porous, sound absorbing layers 20 and a plurality of dense or facing layers 22 attached to faces of the sound absorbing layers.
  • the dense or facing layers 22 have a density that is greater than a density of the sound absorbing layers.
  • the combination of porous, sound absorbing layers 20 and dense or facing layers allows a thin insulation member 16 to provide the sound absorbing effectiveness of a much thicker acoustic insulation member 26 that is made only from porous, sound absorbing material.
  • low frequency sound energy 17 from the source of noise 14 hits a first dense or facing layer 22a.
  • the low frequency sound energy may be sound energy in a frequency range of 100 to 800 Hz, a frequency range of 100 to 400 Hz, a frequency range of 100 to 200 Hz, a frequency range of 100 to 150 Hz, or a f equency range of 100 to 125 Hz.
  • the wavelengths of the low frequency sound energy are long enough that a portion 32 of the low frequency sound energy 17 is reflected by the dense or facing layer 22a and the rest (i.e. a majority) of the low frequency sound energy passes into the first dense or facing layer.
  • the high frequency sound energy may be sound energy at a frequency that is higher than 800 Hz This high frequency sound energy is reflected back into the machine by the facing layer 22a. However, since the wavelength of the high frequency energy is short, the high frequency sound energy dissipates before it finds another path out of the machine.
  • the reflected portion 32 of low frequency airborne acoustic energy or low frequency sound energy is less than fifty percent of the low frequency airborne acoustic energy or low frequency sound energy 17 that hits the first dense or facing layer 22a.
  • the reflected portion 32 may be 50%, less than or equal to 45%, less than or equal to 40%, less than or equal to 35%, less than or equal to 30%, less than or equal to 25%, less than or equal to 20%, less than or equal to 15%, or less than or equal to 10% of the low frequency airborne acoustic energy or low frequency sound energy 17.
  • the reflected portion 32 may escape the cabinet 18 at other locations. As such, reducing the reflected portion 32 may reduce the overall low frequency sound energy that escapes from the cabinet 18 (Fig. 1).
  • Some of the low frequency sound energy that passes into the first dense or facing layer 22a may be absorbed by the first dense or facing layer. Low frequency sound energy that is not absorbed by the first dense or facing layer passes into the first porous, sound absorbing layer 20a. Some of the low frequency sound energy that passes into the first porous, sound absorbing layer 20a is absorbed by the first porous, sound absorbing layer 20a. A remaining portion 38 hits a second dense or facing layer 22b. A portion 40 of the low frequency sound energy 38 is reflected back into the first porous, sound absorbing layer 20a by the dense or facing layer 22b and the rest of the low frequency sound energy passes into the second dense or facing layer 22b.
  • the reflected portion 40 of low frequency sound energy is less than fifty percent of the low frequency sound energy 38 that hits the second dense or facing layer 22b.
  • the reflected portion 40 may be 50%, less than or equal to 45%, less than or equal to 40%, less than or equal to 35%, less than or equal to 30%, less than or equal to 25%, less than or equal to 20%, less than or equal to 15%, or less than or equal to 10% of the low frequency sound energy 38.
  • Low frequency sound energy 48 that is not absorbed by the second dense or facing layer passes into the second porous, sound absorbing layer 20b.
  • Some of the low frequency sound energy 48 that passes into the second porous, sound absorbing layer 20b is absorbed by the second porous, sound absorbing layer 20b.
  • a portion 52 of the low frequency sound energy 48 passes out of the acoustic insulator 16. This low frequency sound energy 52 is much less than the low frequency sound energy 17 that initially hit the member 16.
  • this low frequency sound energy 40 is absorbed by the first porous, sound absorbing layer 20a and a remaining portion hits the first dense or facing layer 22a.
  • the arrangement of dense or facing layers and porous layers allow a majority of the low frequency sound energy to enter the insulation member, trap a majority of the low frequency sound energy, and allow only a small portion 52 of the low frequency sound energy to pass through the insulation member.
  • the small portion of low frequency sound energy 52 is comparable to the portion of low frequency sound energy that passes through a much thicker insulation member that is made only of porous, sound absorbing material.
  • low frequency sound energy 17 or low frequency airborne acoustic energy from the source of noise 14 hits a first dense or facing layer 22a.
  • a portion 32 of the low frequency sound energy 17 is reflected by the dense or facing layer 22a and the rest of the low frequency sound energy passes into the first dense or facing layer 22a.
  • the reflected portion 32 of low frequency sound energy is less than fifty percent of the low frequency sound energy 17 that hits the first dense or facing layer 22a.
  • the reflected portion 32 may be 50%, less than or equal to 45%, less than or equal to 40%, less than or equal to 35%, less than or equal to 30%, less than or equal to 25%, less than or equal to 20%, less than or equal to 15%, or less than or equal to 10% of the low frequency sound energy 17.
  • the reflected portion 32 may escape the cabinet 18 at other locations. As such, reducing the reflected portion 32 may reduce the overall low frequency sound energy that escapes from the cabinet 18 (Fig. 1).
  • Some of the low frequency sound energy that passes into the first dense or facing layer 22a is absorbed by the first dense or facing layer.
  • Low frequency sound energy that is not absorbed by the first dense or facing layer passes into the first porous, sound absorbing layer 20a.
  • Some of the low frequency sound energy that passes into the first porous, sound absorbing layer 20a is absorbed by the first porous, sound absorbing layer 20a.
  • a remaining portion 38 hits a second dense or facing layer 22b.
  • a portion 40 of the low frequency sound energy 38 is reflected back into the first porous, sound absorbing layer 20a by the dense or facing layer 22b and the rest of the low frequency sound energy passes into the second dense or facing layer 22b.
  • the reflected portion 40 of low frequency sound energy is less than fifty percent of the low frequency sound energy 38 that hits the second dense or facing layer 22b.
  • the reflected portion 38 may be 50%, less than or equal to 45%, less than or equal to 40%, less than or equal to 35%, less than or equal to 30%, less than or equal to 25%, less than or equal to 20%, less than or equal to 15%, or less than or equal to 10% of the low f equency sound energy 38.
  • Some of the low frequency sound energy that passes into the second dense or facing layer 22b is absorbed by the second dense or facing layer.
  • Low frequency sound energy that is not absorbed by the second dense or facing layer passes into the second porous, sound absorbing layer 20b.
  • Some of the low frequency sound energy that passes into the second porous, sound absorbing layer 20b is absorbed by the second porous, sound absorbing layer 20b.
  • a remaining portion 48 hits a third dense or facing layer 22c.
  • a portion 50 of the low frequency sound energy 48 is reflected back into the second porous, sound absorbing layer 20b by the dense or facing layer 22c and the rest of the low frequency sound energy passes into the third dense or facing layer 22c and a third porous, sound absorbing layer 20c.
  • the reflected portion 50 of low frequency sound energy is less than fifty percent of the low frequency sound energy 48 that hits the third dense or facing layer 22c.
  • the reflected portion 50 may be 50%, less than or equal to 45%, less than or equal to 40%, less than or equal to 35%, less than or equal to 30%, less than or equal to 25%, less than or equal to 20%, less than or equal to 15%, or less than or equal to 10% of the low frequency sound energy 48.
  • the reflected low frequency sound energy 50 bounces back into the porous, sound absorbing layer 20b. A portion of this low frequency sound energy 50 is absorbed by the second porous, sound absorbing layer 20b and a remaining portion hits the second dense or facing layer 22b. Similarly, the reflected low frequency sound energy 40 bounces back into the porous, sound absorbing layer 20a and a portion 51 of low frequency sound energy 50 that was reflected back into the second porous, sound absorbing layer 20b may pass through the second dense or facing layer 22b into the porous, sound absorbing layer 20a.
  • this low frequency sound energy 40, 51 is absorbed by the first porous, sound absorbing layer 20a and a remaining portion hits the first dense or facing layer 22a.
  • the arrangement of dense or facing layers and porous layers allow a majority of the low frequency sound energy to enter the insulation member, trap a majority of the low frequency sound energy, and allow only a small portion 52 of the low frequency sound energy to pass through the insulation member.
  • the small portion of low frequency sound energy 52 may be comparable to or less than the portion of low frequency sound energy that passes through a much thicker insulation member that is made only of porous, sound absorbing material.
  • the graph of Fig. 3 illustrates the effect of the multi -layer arrangement of the porous, sound absorbing layers 20 and dense or facing layers 22 illustrated by Figs. 2 A and 2B.
  • an absorption coefficient (y-axis) which is a measure of the absorptive effectiveness of the insulation member, is plotted vs. noise frequencies (x-axis) for four different insulation members.
  • the first plot 302 represents the performance of an acoustic insulation member that comprises a porous, lofted sound absorbing layer 20 having a thickness T and single thin facing layer 22.
  • the second plot 304 represents the performance of an acoustic insulation member that comprises a porous, lofted sound 2T and a single thin facing layer 22.
  • the third plot 306 represents the performance of an acoustic insulation member 16 constructed in accordance with Fig. 2A, where the first porous, sound absorbing layer 20a has a thickness T and the second porous, sound absorbing layer 20b has a thickness 2T.
  • the fourth plot 308 represents the performance of an acoustic insulation member 16 constructed in accordance with Fig. 2B, where the first sound absorbing layer 20a has a thickness T, the second sound absorbing layer 20b has a thickness 2T, and the third sound absorbing layer 20c has a thickness 2T.
  • the multi-layer arrangements of multiple porous, sound absorbing layers 20 and multiple dense or facing layers 22 significantly enhances the performance of the insulation member 16, especially in a low frequency range of between 100 and 500 Hz, and most especially around 125 Hz.
  • the multi-layer arrangements have more than an additive effect on the absorption performance, especially in low frequency ranges, such as at frequencies between 100 Hz and 200 Hz.
  • the absorption performance coefficient of the 2 absorptive layer/2 facing layer insulation member is about 15-20% more than the absorption performance coefficients of the two 1 absorptive layer/1 facing layer (plots 302, 304 ) added together.
  • the absorption performance coefficient of the 3 absorptive layer/3 insulation member is about 50% more than the absorption performance coefficient of the 2 absorptive layer / 2 facing layer insulation member (plot 306) added to the 1 absorptive layer/1 absorptive layer (plot 304- i.e. 2T thickness plot).
  • adding the second and third absorptive/facing layers increases the absorptive performance coefficient in a substantially exponential manner.
  • This substantially increased acoustical absorption performance is especially useful in machines having motors and pumps that generate noise in a low frequency range, such as frequencies around 125 Hz.
  • the increased acoustical performance is beneficial in a dishwasher or washing machine that generates noise in a low frequency range, such as frequencies around 125 Hz.
  • the porous, sound absorbing layers 20 may be made from a wide variety of different materials.
  • the porous, sound absorbing layer 20 may be made from thermoplastic polymers, such as polyester, polyethylene terephthalate (PET) polypropylene and the like.
  • the sound absorbing layer 20 is made from a fine fiber PET material, such as a 2 denier fiber size PET material.
  • the porous, sound absorbing layers 20 may be formed with a variety of different densities and lofts, which can be selected to adjust the acoustic performance of the insulation member 16.
  • the porous, sound absorbing layer 20 is 15-300 grams per square foot and a thickness range of 0.5"-3".
  • the first sound absorbing layer 20a may be a PET material, such as VersaMat 2110 (available from Owens Corning) that is 20-25 grams per square foot with a thickness of about 3 ⁇ 4"
  • the second sound absorbing layer 20b may be a PET material, such as VersaMat 2110 that is 60-80 grams per square foot with a thickness of about 1-1/2
  • the third sound absorbing layer 20c (Fig. 2B) may be a PET material, such as VersaMat 2110 that is 60-80 grams per square foot with a thickness of about 1-1/2".
  • any combination of materials, lofts, and densities may be selected or changed to achieve different acoustic performance characteristics.
  • the facing layers 22 can take a wide variety of different forms.
  • the facing 22 is a relatively permeable layer that allows noise and air to pass through the facing member.
  • the facing layers 22 have an airflow resistance between about 600-1400 Rayls.
  • the facing layers may have an airflow resistance between 900-1400 Rayls.
  • the facing layers 22 may be selected to have an airflow resistance of about 900 Rayls, about 1100 Rayls, or about 1400 Rayls.
  • other airflow resistances can be selected.
  • the facing layers 22 in the embodiments illustrated by Figs. 2A and 2B have an airflow resistance of about 900, 1100 and/or 1400 Rayls.
  • the facing layers 22 can be made from a wide variety of different materials and may have a variety of different thicknesses. For example, any material having the airflow resistance described above can be used. Examples of acceptable materials for the facing layers 22 include, but are not limited to polypropylene, PET, non-porous materials that are perforated to allow airflow, such as perforated metal foil, perforated polymer material, such as a Teflon sheet that has been perforated to allow airflow.
  • the facing layer 22 may have a wide variety of different densities and thicknesses. In an exemplary embodiment, the facing is much denser than the sound absorbing layer 20.
  • the dense or facing layers 22a, 22b, 22c may be a polypropylene material, such as a spunbond/meltblown/spunbond sheet that is 50 grams per square meter (gsm)
  • the facing layer 22 can have any thickness.
  • the facing layer 22, when made from a polymer such as polypropylene or PET, may be between 0.01 and 0.1 cm thick.
  • the facing layers 22 and the sound absorbing layers 20 can be assembled in a wide variety of different manners.
  • a facing layer 22 is bonded to one or both of the faces of the sound absorbing layer 20 to form a porous/dense laminate 21.
  • the facing layer(s) 22 may be bonded to the sound absorbing layer(s) in a wide variety of different ways.
  • the facing layer 22 may laminated to the sound absorbing layer 20 using heat and/or pressure or the facing layer may be bonded to the sound absorbing layer with an adhesive.
  • the porous/dense laminates 21 may be assembled together in a wide variety of different ways.
  • Fig. 11 A two laminates 21a, 21b having different thicknesses Tl, T2 and heights HI, H2 are assembled together.
  • Fig. 11B three laminates 21a, 21b, 21c having thicknesses Tl, T2, T3 and heights HI, H2, H3 are assembled together.
  • the thicknesses Tl, T2, T3 and heights HI, H2, H3 may be the same or different.
  • the laminates 21 are held or clamped together with a fastener 1100, rather than being bonded together.
  • a plastic strand 1102 (length exaggerated in Figs. 11A and 11B), such as a nylon or polypropylene strand, with enlarged ends 1104, 1106 extends through the laminates 21a, 21b and holds the laminates together.
  • An example of a plastic strand with enlarged ends 1104, 1106 is a clothing price tag or label attachment.
  • the laminates are bonded together.
  • the laminates 21 may be bonded together in a wide variety of different ways.
  • the laminates 21 may be bonded together using heat and/or pressure or an adhesive may be used.
  • the insulation member 16 may take a wide variety of different forms, be made from a wide variety of different materials, and may be made in a wide variety of different ways.
  • the insulation member or member 16 may have any number of porous, sound absorbing layers 20 and dense or facing layers 22.
  • the insulation member 16 may include any number of alternating dense or facing layers 22 and porous, sound absorbing layers 20 with one porous, sound absorbing layer at one outer surface and one dense or facing layer at the other outer surface, any number of alternating dense or facing layers 22 and porous, sound absorbing layers 20 with porous, sound absorbing layers at the outer surfaces, and/or any number of alternating dense or facing layers 22 and porous, sound absorbing layers 20 with dense or facing layers at the outer surfaces. Any arrangement of porous, sound absorbing layers 20 and dense or facing layers 22 can be used.
  • the insulation member 16 may be positioned and oriented within the cabinet 18 of the machine 10 in a variety of different ways to reduce the amount of sound energy generated by the internal source of noise 14 that leaves the cabinet.
  • the insulation member 16 is disposed inside the cabinet.
  • the insulation member 16 may be disposed inside any of the walls of the cabinet.
  • the insulation member 16 is oriented such that a dense or facing layer 22 faces toward the internal source of noise 14.
  • the dense or facing layer 22 that faces the source of noise 14 is configured to allow a majority of low frequency sound energy from the internal source of noise 14 to pass into the dense or facing layer 22 and into the sound absorbing layer 20 (i.e. less than 1 ⁇ 2 of the low frequency sound energy is reflected back into the machine).
  • the insulation member 16 is oriented such that a porous, sound absorbing layer 20 faces toward the internal source of noise 14.
  • the insulation member 16 is disposed outside the cabinet.
  • the insulation member 16 may be disposed on or outside any of the walls of the cabinet.
  • the insulation member 16 is oriented such that a dense or facing layer 22 faces toward the internal source of noise 14.
  • the dense or facing layer 22 that faces the source of noise 14 is configured to allow a majority of low frequency sound energy that is transferred from the internal source of noise 14 to the cabinet 18 to pass into the dense or facing layer 22 and into the sound absorbing layer 20.
  • the insulation member 16 is oriented such that a porous, sound absorbing layer 20 faces toward the internal source of noise 14.
  • the insulation member 16 is disposed in an opening 60 of the cabinet.
  • the insulation member 16 may be disposed in an opening 60 in any of the walls of the cabinet.
  • the insulation member is soft and/or flexible enough to be folded and/or compressed to fit into the opening 60.
  • the insulation member 16 is also resilient enough to substantially return to its original size and shape to retain the insulation member 16 in the opening 60 without requiring fasteners, adhesive or other means for holding the insulation member 16 in the opening 60.
  • the insulation member 16 is disposed in a bottom opening 60 of the cabinet 18.
  • the insulation member 16 is oriented such that a dense or facing layer 22 faces toward the internal source of noise 14.
  • the insulation member 16 is oriented such that a porous, sound absorbing layer 20 faces toward the internal source of noise 14.
  • the acoustically insulated machine 10 may take a wide variety of different forms.
  • the acoustically insulated machine 10 may be a clothes washing machine, a dishwasher, an air conditioner, a microwave oven, a refrigerator, a freezer, or any other household machine or appliance that makes noise.
  • Fig. 12 illustrates an exemplary embodiment of an acoustically insulated clothes washing machine 1200.
  • the clothes washing machine 1200 may be any type of clothes washing machine, including top loading and front loading washing machines.
  • the non-limiting example illustrated by Fig. 12 is a top loading washing machine.
  • top loading is defined to mean that an internal basket configured to retain laundry items during the washing cycle is oriented in an upright position and that the laundry items enter the basket from a top opening in the washing machine 10.
  • the concepts of the acoustically insulated washing machine 1200 can be applied to any type of washing machine.
  • the illustrated washing machine 1200 includes a cabinet 1220, a washing assembly 1221, a motor assembly 1224 and an acoustic insulating member 1216.
  • the cabinet 1220 is configured to provide an enclosure for the internal components of the washing machine 1200.
  • the illustrated cabinet 1220 includes a top surface 1230, side surfaces 1232 and bottom frame flanges 1234 that surround a bottom opening 1235.
  • the cabinet 1220 can take a variety of different forms.
  • the cabinet 1220 can be made from sheet metal and covered with a finish such as an enamel based finish.
  • the cabinet can be made from a wide variety of different materials and/or combinations of materials.
  • the cabinet 1220 may have any finish.
  • the cabinet 1220 can be made from stainless steel sheet metal, and can have other desired finishes, such as for example a clear lacquer finish.
  • the top surface 1230 of the cabinet includes an opening 1236 for accepting clothes. In the embodiment where the washing machine is a front loading washing machine, the opening 1236 would be provided on the front wall of the cabinet 1220.
  • the illustrated washing assembly 1221 includes a tub 1222 and a basket 1226. Since the illustrated washing machine 1200 is a top loading machine, the tub and basket 1222, 1226 are vertically oriented. In a front loading washing machine, the tub and basket will be oriented and configured differently. It should be appreciated that the top loading machine is described only to provide an example and the acoustic insulation 1216 can be used with any type of clothes washing machine.
  • the tub 1222 is suspended within the cabinet 1220 and is configured to retain water used for washing the laundry items.
  • the tub 1222 can take a wide variety of different forms and can be made from a wide variety of different materials.
  • the tub 1222 may be generally cylindrical with an open top 1240 as shown, but may take a variety of different shapes.
  • the tub may be made from plastic/polymeric materials, or metals, such as steel stainless steel, and aluminum.
  • the tub is made from a material that is resistant to corrosion when exposed to water or at least the inside surface of the tub is coated with a material that is resistant to corrosion when exposed to water.
  • the tub 1222 is connected to ends of a plurality of suspension devices 1238.
  • the other ends of the suspension devices 1238 being coupled to the cabinet 1220.
  • the suspension devices 1238 are coupled to the top surface 1230 of the cabinet 1220.
  • the suspension devices 1238 are configured to allow some vertical movement of the tub 1222 with respect to the cabinet 1220 while limiting rotational movement of the tub 1222 with respect to the cabinet 1220.
  • the tub 1222 may be coupled to the cabinet 1220 in a wide variety of different ways.
  • the suspension devices 1238 are a combination of rods, springs and attachment mechanisms.
  • the suspension devices 1238 can be any desired structure, mechanism or device sufficient to suspend the tub 1222 within the cabinet 1220.
  • the suspension devices 1238 may allow vertical movement of the tub 1222 with respect to the cabinet 1220 or otherwise couple the tub 1222 to the cabinet 1220.
  • the motor assembly 1224 is positioned below the tub 1222.
  • the illustrated motor assembly 1224 is configured to rotate the basket 1226 via shaft 1242.
  • the motor assembly 1224 may take a wide variety of different forms and may be coupled to the basket 1226 in many different ways.
  • the illustrated motor assembly 1224 includes an external rotor 1244 connected to the shaft 1242 with a stator of the motor being secured to the tub 1222 by a connection 1245.
  • the motor assembly 1224 may include an external stator that is secured to the tub 1222 with the internal rotor connected to shaft 1242. Any rotor/stator configuration and coupling to the basket 1226 may be employed.
  • the basket 1226 is positioned within the tub 1222 and configured to retain the laundry items during the washing cycle.
  • the basket 1226 can take a wide variety of different forms and can be made from a wide variety of different materials.
  • the basket 1226 may be generally cylindrical with an open top as shown, but may take a variety of different shapes.
  • the basket may be made from plastic/polymeric materials, or metals, such as steel, stainless steel, and aluminum.
  • the basket is made from a material that is resistant to corrosion when exposed to water or the tub is coated with a material that is resistant to corrosion when exposed to water.
  • the acoustic msulation member 1216 is disposed in the bottom opening 1235 of the cabinet 1220. Referring to Fig.
  • the acoustic insulation member 1216 is soft and flexible.
  • the acoustic insulation member 1216 is assembled with the cabinet 1220 by compressing or folding up the insulation member 1216 as indicated by arrows 1300.
  • the acoustic insulation member 1216 is then moved upward as indicated by arrow 1302 to place the acoustic insulation member 1216 in the bottom opening 1235 of the cabinet 1220. Referring to Fig.
  • the acoustic insulation member is released and/or unfolded such that the acoustic insulation member 1216 is retained in the bottom opening 1235 without requiring any fasteners or adhesive.
  • the acoustic insulation member 1216 may be sized and/or shaped in a wide variety of different ways to facilitate retention in the bottom opening 1235.
  • the acoustic insulation member 1216 includes a lip or step 1400 that engages or rests on the lip portion 1234 of the bottom opening 1235.
  • the acoustic insulation member 1216 is positioned between the motor 1224 and a floor 1250 that supports the cabinet 1220 of the clothes washing machine 1200. As such, the acoustic insulation member 1216 absorbs low frequency sound energy and reflects high frequency sound energy generated by the washing machine motor 1224. As such, the acoustic insulation member 1216 inhibits sound energy generated by the washing machine motor 1224 from exiting through the bottom opening 1227.
  • a bottom surface 1500 of the acoustic insulation member 1216 is spaced apart from the floor 1250 that supports cabinet 1220.
  • a portion 1504 of the sound energy 1506 that leaves the acoustic insulation member 1216 is reflected off of the floor 1502 and back to the acoustic insulation member 1216. A portion of this reflected sound energy 1504 is absorbed by the acoustic insulation member 1216.
  • a bottom surface 1600 of the acoustic insulation member 1216 is in contact with the floor 1250 that supports cabinet 1220.
  • sound energy 1506 that leaves the acoustic insulation member 1216 is reflected off of the floor 1502 and back into the acoustic insulation member 1216.
  • the acoustic insulation member 1216 may damp vibrations of the floor to reduce noise that is transferred through the floor.
  • the acoustic insulation member 1216 may take a wide variety of different forms.
  • the acoustic insulation member may have any of the multi-layer configurations of the insulation member 16 described above.
  • the acoustic insulation member 1216 may be constructed from a single layer of material having uniform properties throughout.
  • the acoustic insulation member 1216 comprises a porous, sound absorbing layer 20 and a dense or facing layer 22 attached to a first side of the sound absorbing layer 20.
  • the dense or facing layer 22 has a density that is greater than a density of the sound absorbing layer.
  • the acoustic insulation member 1216 is oriented such that the dense or facing layer 22 faces toward the motor 1224 (see Fig.
  • the dense or facing layer 22 may be configured to allow a majority of low frequency sound energy from the motor 1224 to pass into the dense or facing layer 22. A majority of this low frequency sound energy is absorbed by the dense or facing layer 22 and the sound absorbing layer 20.
  • a second or middle dense or facing layer 22 is attached to a second side 1400 of the sound absorbing layer 20.
  • the second dense or facing layer also has a density that is greater than the density of the sound absorbing layer.
  • a second sound absorbing layer 1402 is attached to the at least one middle dense or facing layer.
  • FIG. 17-19 another exemplary embodiment of an acoustically insulated machine is an acoustically insulated dishwasher 1700.
  • the acoustically insulated dishwasher 1700 illustrated by Figs. 17 and 18 includes a housing 1702, a pump 1704, a drive motor 1706, a plate 1708 closing a front side 1710 of the housing, and an insulation member 1716.
  • the housing 1702 includes a washing chamber 1718 (Fig. 18) and an access door 1720 (Fig. 17).
  • a plurality of legs 1722 or a combination of legs 1722 and wheels 1723 support the housing 1702.
  • the pump 1704 and drive motor 1706 are provided in a cavity 1724 between the legs 1722 and below the housing 1702.
  • the plate 1708 closes a front side of the cavity.
  • the insulation member 1716 is disposed between the plate 1708 and the pump 1704 and drive motor 1706.
  • the acoustic insulation member 1716 may take a wide variety of different forms.
  • the acoustic insulation member may have any of the multi-layer configurations of the insulation member 16 described above.
  • the acoustic insulation member 1716 comprises a porous, sound absorbing layer 20 and a dense or facing layer 22 attached to a first side 1900 of the sound absorbing layer 20.
  • the dense or facing layer 22 has a density that is greater than a density of the sound absorbing layer.
  • the acoustic insulation member 1716 is oriented such that the dense or facing layer 22 faces toward the pump 1704 and motor 1706.
  • the dense or facing layer 22 may be configured to allow a majority of low frequency sound energy from the pump 1704 and motor 1706 to pass into the dense or facing layer 22.
  • a second or middle dense or facing layer 1902 is attached to a second side 1904 of the sound absorbing layer 20.
  • the second dense or facing layer also has a density that is greater than the density of the sound absorbing layer.
  • a second sound absorbing layer 1906 is attached to the at least one middle dense or facing layer.
  • the insulation member 1716 may be used in a wide variety of different dishwashers.
  • the following description of a dishwasher is provided for illustrative purposes only and is not intended to limit the scope of the application unless otherwise stated.
  • the dishwasher 1700 illustrated by Fig. 18 includes a wash arm 1814 that is arranged within washing chamber 1718 above a sump 1815.
  • a wash arm 1814 selectively delivers jets of washing fluid onto kitchenware placed within dishwasher 1700 in a manner known in the art.
  • the illustrated dishwasher includes a door 1720 having a handle 1819 that selectively provides access to washing chamber 1718.
  • the door 1720 includes a plurality of control elements (not shown) for selecting particular operating parameters of a washing operation. In the embodiment shown in Fig.
  • the dishwasher 1700 is arranged below a countertop 1725 adjacent to cabinetry 1727 and is provided with a toe kick plate 1708 that extends below door 1720 to provide a finished, aesthetic appearance.
  • the insulation member 1717 is provided between the toe kick plate 1708 and the pump 1704.
  • dishwasher 1700 includes a base portion 1834 that is provided with a pair of rear wheels, one of which is indicated at 1723, that enable an installer to easily position dishwasher 1700 below the countertop 1825, and a pair of leveling legs, one of which is shown at 1722, that enable the installer to accurately position/level the dishwasher 1700.
  • the wheels 1723 are replaced with a pair of rear legs 1722.
  • the pump 1704 and drive motor 1706 are provided in a cavity 1724 between the legs 1722 and below the housing 1702.
  • the wash pump 1704 is connected to sump 1815. In operation, wash pump 1704 creates a circulating flow of washing fluid within washing chamber 1718 during a washing operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L'invention concerne des machines isolées acoustiquement qui ont une source interne de bruit et un élément d'isolation. L'élément d'isolation peut comprendre une pluralité de couches poreuses insonorisantes et une pluralité de couches denses ou de revêtement fixées aux faces des couches insonorisantes. Les couches denses ou de revêtement ont une densité qui est supérieure à la densité des couches insonorisantes. L'élément d'isolation peut être orienté de telle sorte qu'une des couches denses ou de revêtement soit tournée vers la source interne de bruit. L'élément d'isolation peut être configuré de telle sorte que la majeure partie de l'énergie sonore basse fréquence produite par la source interne de bruit ne soit pas renvoyée dans la machine. C'est-à-dire, la couche dense ou de revêtement peut être configurée pour permettre à la majeure partie de l'énergie sonore basse fréquence provenant de la source interne de bruit de pénétrer dans l'élément d'isolation.
PCT/US2011/037701 2011-05-24 2011-05-24 Machine isolée acoustiquement WO2012161695A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2011/037701 WO2012161695A1 (fr) 2011-05-24 2011-05-24 Machine isolée acoustiquement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2011/037701 WO2012161695A1 (fr) 2011-05-24 2011-05-24 Machine isolée acoustiquement

Publications (1)

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WO2012161695A1 true WO2012161695A1 (fr) 2012-11-29

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PCT/US2011/037701 WO2012161695A1 (fr) 2011-05-24 2011-05-24 Machine isolée acoustiquement

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103996397A (zh) * 2013-02-14 2014-08-20 精工爱普生株式会社 吸声体、电子设备
EP2815688A1 (fr) * 2013-06-21 2014-12-24 Whirlpool Corporation Appareil ménager, en particulier un sèche-linge, lave-linge ou lave-vaisselle
WO2017134341A1 (fr) * 2016-02-02 2017-08-10 Framery Oy Structure de cloison
US11207863B2 (en) 2018-12-12 2021-12-28 Owens Corning Intellectual Capital, Llc Acoustic insulator
US11666199B2 (en) 2018-12-12 2023-06-06 Owens Corning Intellectual Capital, Llc Appliance with cellulose-based insulator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020134615A1 (en) * 2001-02-21 2002-09-26 Herreman Kevin Michael Noise reduction system for kitchen
US20080135327A1 (en) * 2005-03-30 2008-06-12 Toshiyuki Matsumura Sound Absorbing Structure
US20090113843A1 (en) * 2007-10-31 2009-05-07 E.I. Du Pont De Nemours And Company Broadband passive distributed tuned vibration and acoustic absorber for modally dense structures

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020134615A1 (en) * 2001-02-21 2002-09-26 Herreman Kevin Michael Noise reduction system for kitchen
US20080135327A1 (en) * 2005-03-30 2008-06-12 Toshiyuki Matsumura Sound Absorbing Structure
US20090113843A1 (en) * 2007-10-31 2009-05-07 E.I. Du Pont De Nemours And Company Broadband passive distributed tuned vibration and acoustic absorber for modally dense structures

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103996397A (zh) * 2013-02-14 2014-08-20 精工爱普生株式会社 吸声体、电子设备
EP2767976A3 (fr) * 2013-02-14 2016-02-17 Seiko Epson Corporation Corps d'absorption acoustique et dispositif électronique
EP2815688A1 (fr) * 2013-06-21 2014-12-24 Whirlpool Corporation Appareil ménager, en particulier un sèche-linge, lave-linge ou lave-vaisselle
WO2017134341A1 (fr) * 2016-02-02 2017-08-10 Framery Oy Structure de cloison
US11117350B2 (en) 2016-02-02 2021-09-14 Framery Oy Wall structure
US11207863B2 (en) 2018-12-12 2021-12-28 Owens Corning Intellectual Capital, Llc Acoustic insulator
US11666199B2 (en) 2018-12-12 2023-06-06 Owens Corning Intellectual Capital, Llc Appliance with cellulose-based insulator

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