EP4324976A1 - Appareil de couvercle arrière et dispositif de traitement de vêtements - Google Patents

Appareil de couvercle arrière et dispositif de traitement de vêtements Download PDF

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Publication number
EP4324976A1
EP4324976A1 EP21936734.9A EP21936734A EP4324976A1 EP 4324976 A1 EP4324976 A1 EP 4324976A1 EP 21936734 A EP21936734 A EP 21936734A EP 4324976 A1 EP4324976 A1 EP 4324976A1
Authority
EP
European Patent Office
Prior art keywords
side plate
sound absorption
rear cover
protrusions
cover apparatus
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21936734.9A
Other languages
German (de)
English (en)
Other versions
EP4324976A4 (fr
Inventor
Shengli Zhou
Jiang Wu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Little Swan Electric Co Ltd
Original Assignee
Wuxi Little Swan Electric Co Ltd
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
Priority claimed from CN202110394536.6A external-priority patent/CN115198500A/zh
Priority claimed from CN202120745756.4U external-priority patent/CN215441108U/zh
Application filed by Wuxi Little Swan Electric Co Ltd filed Critical Wuxi Little Swan Electric Co Ltd
Publication of EP4324976A1 publication Critical patent/EP4324976A1/fr
Publication of EP4324976A4 publication Critical patent/EP4324976A4/fr
Pending legal-status Critical Current

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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • 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
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Definitions

  • the application relates to the technical field of clothing care, and in particular to a rear cover apparatus and a clothing treatment device.
  • a clothing treatment device is used as a clothes drying tool and is favored by more and more users.
  • the clothing treatment device brings convenience to the user, while noise radiated by the clothing treatment device to its surrounding environment in a clothes drying process is a big problem puzzling the user.
  • aerodynamic noise is a main noise source of the clothes dryer, here, a rear cover apparatus radiates a high aerodynamic noise outwards, and there is a large difficulty to reduce such noise.
  • embodiments of the application are desired to provide a rear cover apparatus with a good noise reduction effect and a clothing treatment device.
  • An embodiment of the application provides a rear cover apparatus, the rear cover apparatus is applied to a clothing treatment device, and includes an inner cover and an outer cover.
  • the inner cover is formed with an airflow channel, and includes a first side plate and multiple protrusions protruding from a surface of the first side plate, the airflow channel and the protrusions are located on two opposite sides of the first side plate.
  • the outer cover is arranged at a side of the inner cover away from the airflow channel, and defines, with the inner cover, a silencing cavity where the protrusions are located, the inner cover is provided with sound absorption holes communicating the airflow channel to the silencing cavity, and at least a part of the sound absorption holes penetrate the first side plate and the protrusions.
  • a protrusion thickness of the protrusion on the first side plate may be 2 mm to 5 mm.
  • a hole depth of the sound absorption hole penetrating the first side plate and the protrusions may be 4 mm to 9 mm.
  • an equivalent diameter of the sound absorption hole may be 2.5 mm to 10 mm.
  • the outer cover may be a metal member; and/or, the inner cover may be a plastic member.
  • the outer cover may include a second side plate, the second side plate is arranged to be stacked with the first side plate at an interval, and a protrusion thickness of the protrusion on the first side plate is 0.1 to 0.3 times of a distance between the first side plate and the second side plate.
  • the outer cover may include a second side plate, the second side plate is arranged to be stacked with the first side plate at an interval, and a distance between the first side plate and the second side plate is 7 mm to 20 mm.
  • the rear cover apparatus may include a sound absorption material, the sound absorption material is arranged in the silencing cavity.
  • each of the sound absorption holes may penetrate the first side plate and a corresponding one of the protrusions
  • the sound absorption material includes a sound absorption film layer
  • the sound absorption film layer covers an end of each of the protrusions away from the first side plate to block each of the sound absorption holes.
  • each of the sound absorption holes may penetrate the first side plate and a corresponding one of the protrusions
  • the sound absorption material includes a flexible sound absorption material
  • the flexible sound absorption material is in a compressed state and blocks each of the sound absorption holes.
  • the outer cover may include a second side plate, the second side plate is arranged to be stacked with the first side plate at an interval, and the flexible sound absorption material is squeezed between the first side plate and the second side plate.
  • the outer cover may include a second side plate, the second side plate is arranged to be stacked with the first side plate at an interval;
  • the rear cover apparatus may include a partition plate, the partition plate is arranged between the first side plate and the second side plate, the flexible sound absorption material is squeezed between the partition plate and the first side plate, and an air interlayer is formed between the partition plate and the second side plate.
  • a side of the inner cover away from the outer cover may be opened, the airflow channel includes an impeller mounting area and an air supply area, the air supply area is located downstream of the impeller mounting area in an airflow flowing direction, and the airflow channel sucks air from an opened part of the impeller mounting area and supplies air from an opened part of the air supply area.
  • An embodiment of the application provides a clothing treatment device, the clothing treatment device is provided with a circulation air passage, and includes a box body, a drum assembly arranged in the box body, and the rear cover apparatus of any embodiment of the application.
  • the drum assembly is provided with a clothing treatment chamber, and the airflow channel and the clothing treatment chamber are located on the circulation air passage.
  • a rear side wall of the box body may be provided with an air outlet and an air inlet; the rear cover apparatus may be arranged outside the box body and located at a rear side of the rear side wall of the box body, and the airflow channel communicates the air outlet to the air inlet.
  • the clothing treatment device may include a base, an evaporator, a condenser and a wind wheel.
  • the box body is arranged to cover above the base.
  • the evaporator and the condenser are arranged on the base and located on the circulation air passage.
  • the wind wheel is arranged in the airflow channel. Airflow from the clothing treatment chamber sequentially flows through the evaporator and the condenser, and then enters the airflow channel.
  • the first side plate is used as a perforated thin plate and forms a perforated plate sound absorption structure with the silencing cavity behind it, air in the sound absorption hole generates friction with the hole wall due to resonance, so that sound energy is lost, and noise radiated by the rear cover apparatus is reduced.
  • the protrusions of the embodiments of the application may increase thickness of an air column in the sound absorption hole, that is, increase an flow path of airflow in the sound absorption hole, so that a sound absorption effect of noise with low-frequency components is improved.
  • orientation or positional relationships indicated by terms “front”, “rear”, “up”, “down” or the like are based on orientation or positional relationships shown in FIG. 1 , and these terms are only intended to facilitate the descriptions of the embodiments of the application and simplify the descriptions, and are not intended to indicate or imply that a referred device or element must have a particular orientation, configure and operate in a particular orientation, and thus cannot be understood as limitation of the embodiments of the application.
  • terms “first”, “second” and “third” are used for the purpose of description only, and cannot be understood as indicating or implying relative importance.
  • An embodiment of the application provides a rear cover apparatus 7, the rear cover apparatus 7 is applied to a clothing treatment device, to guide flow of a circulation airflow of the clothing treatment device.
  • An embodiment of the application provides a clothing treatment device, the clothing treatment device is provided with a circulation air passage.
  • the clothing treatment device includes a box body 1, a drum assembly 2 arranged in the box body 1, and the rear cover apparatus 7 of any embodiment of the application
  • the drum assembly 2 is provided with a clothing treatment chamber 2a communicated with the circulation air passage, and an airflow channel 71a is located on the circulation air passage, that is, airflow in the circulation air passage flows through interior of the rear cover apparatus 7 and the clothing treatment chamber 2a.
  • the clothing treatment device may be a clothes dryer, a washer-dryer, etc.
  • the drum assembly 2 includes an outer tub and an inner tub rotatably arranged in the outer tub.
  • the drum assembly 2 is provided with the inner tub only, while is not provided with the outer tub. That is, in the embodiment, the clothing treatment device is provided with only one tub.
  • the rear cover apparatus 7 may be arranged in the box body 1, or may be arranged outside the box body 1.
  • the rear cover apparatus 7 is arranged in the box body 1, that is, the rear cover apparatus 7 is hidden in the box body 1.
  • the rear cover apparatus 7 is arranged outside the box body 1 and located at a rear side of a rear side wall 11 of the box body 1.
  • the rear side wall 11 of the box body 1 is provided with an air outlet 1a and an air inlet 1b, and the airflow channel 71a communicates the air outlet 1a to the air inlet 1b.
  • the rear cover apparatus 7 is exposed outside the clothing treatment device, and noise generated by the rear cover apparatus 7 directly radiates to its surrounding environment. Therefore, noise reduction treatment of the rear cover apparatus 7 becomes particularly important.
  • the clothing treatment device is provided with a condensing apparatus located on the circulation air passage outside the clothing treatment chamber 2a and configured to reduce temperature of the air and dehumidify the air, a heating member configured to heat the dehumidified air, and a wind wheel 6 configured to make airflow in the circulation air passage form a directional flow.
  • Clothes drying process and principle of the clothing treatment device are as follows.
  • a dry hot airflow enters the clothing treatment chamber 2a from downstream of the circulation air passage; in the clothing treatment chamber 2a, the dry hot airflow flows through surfaces of wet clothes, exchanges heat and moisture with the wet clothes, and absorb moisture in the clothes to become a wet hot airflow; the wet hot airflow enters upstream of the circulation air passage, and is subjected to condensation and dehumidification in a condensation apparatus in the circulation air passage, to form a low-temperature dry airflow; the low-temperature dry airflow is heated by the heating member to form a dry hot airflow; the dry hot airflow enters the clothing treatment chamber 2a again.
  • the above processes operate circularly, to achieve continuous and efficient drying of the clothes.
  • the clothing treatment device includes a base 5, an evaporator 3 and a condenser 4.
  • the box body 1 is arranged to cover above the base 5.
  • the evaporator 3 and the condenser 4 are arranged on the base 5 and located on the circulation air passage. Both the evaporator 3 and the condenser 4 are located on the circulation air passage, the evaporator 3 is located upstream of the condenser 4 in an airflow flowing direction. Airflow from the clothing treatment chamber 2a sequentially flows through the evaporator 3 and the condenser 4, and then enters the airflow channel 71a.
  • the evaporator 3 and the condenser 4 are used as a part of a heat pump system, that is, the clothing treatment device of the embodiment condenses, dehumidifies and heats airflow by using a heat pump technology.
  • the evaporator 3 is used as a condensation apparatus to reduce temperature of airflow and dehumidify the airflow, and the condenser 4 is used as a member to heat airflow.
  • the rear cover is made of a single-layer plate structure, and plate thickness of the rear cover generally does not exceed 4 millimeter (mm) based on factors such as manufacturing process, production cost or the like, that is, the rear cover belongs to a thin-walled member.
  • mm millimeter
  • the wall surface of the rear cover in the related art is a noise radiation surface with a large area.
  • the rear cover apparatus 7 includes an inner cover 71 and an outer cover 72.
  • the inner cover 71 is formed with an airflow channel 71a, and it may be understood that the airflow channel 71a is located on the circulation air passage.
  • the inner cover 71 includes a first side plate 711 and multiple protrusions 713 protruding from a surface of the first side plate 711.
  • the airflow channel 71a and the protrusions 713 are located on two opposite sides of the first side plate 711.
  • the outer cover 72 is arranged at a side of the inner cover 71 away from the airflow channel 71a.
  • the outer cover 72 defines a silencing cavity 7a with the inner cover 71, the protrusions 713 are located in the silencing cavity 7a.
  • the inner cover 71 is provided with sound absorption holes 71b communicating the airflow channel 71a to the silencing cavity 7a, and at least a part of the sound absorption holes 71b penetrate the first side plate 711 and the protrusions 713.
  • At least a part of the sound absorption holes 71b penetrating the first side plate 711 and the protrusions 713 includes two cases as follows. In a first case, only a part of the sound absorption holes 71b penetrate the first side plate 711 and the protrusions 713, and another part of the sound absorption holes 71b penetrate the first side plate 711 only and does not penetrate the protrusions 713. In a second case, each of the sound absorption holes 71b penetrates the first side plate 711 and a corresponding one of the protrusions 713.
  • the first side plate 711 is used as a perforated thin plate and forms a perforated plate sound absorption structure with the silencing cavity 7a behind it, air in the sound absorption hole 71b generates friction with the hole wall due to resonance, so that sound energy is lost, and noise radiated by the rear cover apparatus 7 is reduced.
  • the protrusions 713 of the embodiments of the application may increase thickness of an air column in the sound absorption hole 71b, that is, increase an flow path of airflow in the sound absorption hole 71b, so that a sound absorption effect of noise with low-frequency components is improved.
  • protrusion 713 is not limited, such as a hollow cylinder, a hollow frustum, a hollow cuboid, etc.
  • an outer contour of the protrusion 713 may be a regular shape or an irregular shape.
  • a protrusion thickness d1 of the protrusion 713 on the first side plate 711 is 2 mm to 5 mm, such as 2 mm, 2.4 mm, 3 mm, 3.5 mm, 4 mm, 4.6 mm, 5 mm, etc.
  • the protrusion thickness of the protrusion 713 does not excessively increase size of the rear cover apparatus 7 in a front-rear direction of the clothing treatment device.
  • a hole depth d3 of the sound absorption hole 71b is 4 mm to 9 mm, such as 4 mm, 4.5 mm, 5 mm, 5.4 mm, 6 mm, 6.6 mm, 7 mm, 7.3 mm, 7.8 mm, 8 mm, 8.5 mm, 9 mm, etc.
  • thickness of the air column in the sound absorption hole 71b may be controlled in a suitable range, so that airflow loses large sound energy in the sound absorption hole 71b.
  • the airflow channel 71a includes an impeller mounting area 71a' and an air supply area 71a", the air supply area 71a" is located downstream of the impeller mounting area 71a' in the airflow flowing direction, and the airflow channel 71a sucks air from an opened part of the impeller mounting area 71a' and supplies air from an opened part of the air supply area 71a'.
  • the air outlet 1a on the rear side wall 11 of the box body 1 is aligned with the impeller mounting area 71a', and the air inlet 1b on the rear side wall 11 of the box body 1 is aligned with the air supply area 71a".
  • the rear side wall 11 of the box body 1 closes the opened part of the inner cover 71, airflow enters the impeller mounting area 71a' of the airflow channel 71a from the air outlet 1a at the bottom of the rear side wall 11 of the box body 1, flows upward along the airflow channel 71a, and enters the box body 1 from the air inlet 1b at the top of the rear side wall 11 of the box body 1, and thus enters the clothing treatment chamber 2a.
  • the inner cover 71 includes a first enclosing plate 712, the first enclosing plate 712 is connected to the first side plate 711, extends along an edge of the first side plate 711, and is located at a side of the first side plate 711 away from the second side plate 721, that is, the first enclosing plate 712 is located at a side of the first side plate 711 facing the box body 1.
  • the first side plate 711 defines the airflow channel 71a with the first enclosing plate 712.
  • a volute tongue is formed at a part of the first enclosing plate 712 close to an air outlet position of an impeller 6, that is, the first side plate 711 and the first enclosing plate 712 corresponding to the impeller mounting area 71a' form a volute, and the volute and the impeller 6 cooperate to form a structural form of a centrifugal fan.
  • an end of the first enclosing plate 712 away from the first side plate 711 is formed with a first flanging 7121.
  • the first flanging 7121 is fitted to the rear side wall 11 of the box body 1.
  • the first flanging 7121 may increase a contact area between the inner cover 71 and the rear side wall 11 of the box body 1, and improve fitting reliability of the inner cover 71 and the rear side wall 11.
  • the inner cover 71 includes multiple mounting lugs 714 arranged on the first flanging 7121, and the mounting lugs 714 are provided with first connection holes respectively.
  • the inner cover 71 is fitted onto the rear side wall 11, and screws pass through the first connection holes and are screwed into the rear side wall 11, so that the inner cover 71 may be mounted on the rear side wall 11 of the box body 1.
  • the inner cover 71 bears a large airflow impact, and the mounting lugs 714 may improve connection reliability of the inner cover 71 and the rear side wall 11 of the box body 1.
  • the inner cover 71 may be made of a split-type structure, for example, the inner cover 71 is formed by splicing multiple plates together; the inner cover 71 may also be made of an integrally molded structure, for example, the inner cover 71 is formed by integrated injection molding, or formed by a metal sheet through a cold working process.
  • the inner cover 71 may be made of a plastic material or a metal material.
  • the inner cover 71 is a plastic member, that is, the inner cover 71 is formed by injection molding of a plastic material, such as Acrylonitrile Butadiene Styrene (ABS), Polypropylene (PP), etc.
  • the outer cover 72 includes a second side plate 721, the second side plate 721 is arranged to be stacked with the first side plate 711 at an interval, that is, the first side plate 711 and the second side plate 721 are arranged in a face-to-face manner, the first side plate 711 and the second side plate 721 are arranged at an interval, and the silencing cavity 7a is located between the first side plate 711 and the second side plate 721.
  • the outer cover 72 includes a second enclosing plate 722, the second enclosing plate 722 extends along an edge of the second side plate 721, and is located at a side of the second side plate 721 facing the first side plate 711, that is, the second enclosing plate 722 is located at a side of the second side plate 721 facing the box body 1.
  • the second enclosing plate 722 surrounds the first enclosing plate 712, and after the rear cover apparatus 7 is assembled on the rear side wall 11 of the box body 1, the inner cover 71 is located in a space enclosed by the outer cover 72 and the rear side wall 11 together.
  • a side of the first side plate facing the box body 1 is provided with the second side plate, without providing the second enclosing plate 712.
  • the second enclosing plate 722 is provided and surrounds the first enclosing plate 712, leakage of sound from side surfaces may be avoided, and influence of noise is reduced.
  • an end of the second enclosing plate 722 away from the second side plate 721 is formed with a second flanging 7221.
  • the second flanging 7221 is fitted to the rear side wall 11 of the box body 1.
  • the second flanging 7221 may increase a contact area between the outer cover 72 and the rear side wall 11 of the box body 1, and improve fitting reliability of the outer cover 72 and the rear side wall 11.
  • the second flanging 7221 is provided with second connection holes.
  • the outer cover 72 is fitted onto the rear side wall 11 and covers around the inner cover 71, and screws pass through the first connection holes and are screwed into the rear side wall 11, so that the outer cover 72 may be mounted on the rear side wall 11 of the box body 1.
  • the outer cover 72 may be made of a split-type structure, for example, the outer cover 72 is formed by splicing multiple plates together; the outer cover 72 may also be made of an integrally molded structure, for example, the outer cover 72 is formed by integrated injection molding, or formed by a metal sheet through a cold working process.
  • the outer cover 72 may be made of a plastic material or a metal material.
  • the outer cover 72 is a sheet metal part, that is, the outer cover 72 is made of a metal material.
  • the inner cover 71 is a plastic member, and the outer cover 72 is also an integrated injection molded plastic member. In some other embodiments, the inner cover 71 is a plastic member, and the outer cover 72 is a sheet metal part. In some other embodiments, the inner cover 71 is a sheet metal part, and the outer cover 72 is also a sheet metal part. In some other embodiments, the inner cover 71 is a sheet metal part, and the outer cover 72 is a plastic member.
  • the inner cover 71 is a plastic member and the outer cover 72 is a sheet metal part
  • the inner cover 71 made of a plastic material is weak in heat conduction capability and thus has good thermal insulation performance, heat loss of airflow in a process of flowing through the airflow channel 71a is small, and energy consumption of the clothing treatment device is reduced; and the outer cover 72 made of a metal material has excellent sound insulation performance. Therefore, thermal insulation performance and sound insulation performance may be simultaneously considered in the embodiment.
  • the first enclosing plate 712 may also be provided with sound absorption holes.
  • a distance d2 between the first side plate 711 and the second side plate 721 is 7 mm to 20 mm, such as 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm.
  • Depth of the silencing cavity 7a is related to a vibration absorption frequency, and it may be achieved by the distance range of the embodiment that the silencing cavity 7a has an appropriate depth, so that a resonant frequency moves to a low-frequency end in case that size of the rear cover apparatus 7 is controlled in a suitable range.
  • the protrusion thickness d1 of the protrusion 713 on the first side plate 711 is 0.1 to 0.3 times of the distance d2 between the first side plate 711 and the second side plate 721.
  • it includes 0.1, 0.12, 0.15, 0.18, 0.2, 0.23, 0.25, 0.25, 0.3 times, etc.
  • the protrusion thickness d1 of the protrusion 713 on the first side plate 711 is d1
  • the distance between the first side plate 711 and the second side plate 721 is d2
  • d1 d2 * (0.1-0.3).
  • the first size is much smaller than the second size, by considering the overall size of the rear cover apparatus 7 in the front-rear direction of the clothing treatment device.
  • Specific shapes of the sound absorption hole 71b are not limited, and may be circular, polygonal, elliptical, etc.
  • an equivalent diameter of the sound absorption hole 71b is 2.5 mm to 10 mm, such as 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm.
  • the size range facilitates processing and manufacturing in case of providing a sound absorption function.
  • the equivalent diameter refers to a diameter of a circular sound absorption hole 71b which is the same as area of a non-circular sound absorption hole 71b when the sound absorption hole 71b is non-circular.
  • porosity of the first side plate 711 is 2% to 40%, such as 2%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, etc.
  • the porosity in such range may be suitable for a frequency band of sound to be absorbed by the rear cover apparatus 7 of the embodiments of the application.
  • the porosity is a ratio of a sum of areas of all the sound absorption holes 71b on the first side plate 711 to area of the first side plate 711.
  • the silencing cavity 7a is an air cavity, that is, any sound absorption material is not provided in the silencing cavity 7a.
  • the rear cover apparatus 7 includes a sound absorption material 73, the sound absorption material 73 is arranged in the silencing cavity 7a.
  • Specific types of the sound absorption material 73 are not limited, and the sound absorption material 73 enables a sound wave passing through the sound absorption hole 71b to lose sound energy again, thereby further reducing noise of the rear cover apparatus 7 radiated to the environment.
  • the sound absorption material 73 covers an end of each protrusion 713 away from the first side plate 711 to block each of the sound absorption holes 71b.
  • block refers to the sound absorption material 73 forming a blocking effect on airflow entering the sound absorption hole 71b.
  • the sound absorption material 73 may be a permeable material or an impermeable material.
  • the sound absorption material 73 includes a sound absorption film layer 731, and the sound absorption film layer 731 covers each of the sound absorption holes 71b.
  • Each of the sound absorption holes 71b and the silencing cavity 7a behind it form a row of cavity resonators.
  • the sound absorption film layer 731 may be a plastic film, a lacquer cloth, an artificial leather, etc.
  • the sound absorption film layer 731 has characteristics of inpermeability, softness, exhibiting elasticity under tension, or the like, and absorbs incident sound energy near the resonant frequency.
  • the silencing cavity 7a behind the sound absorption film layer 731 is an air cavity, that is, the sound absorption material 73 includes the sound absorption film layer 731 only.
  • the sound absorption material 73 further includes a flexible sound absorption material 732 filled in the silencing cavity 7a behind the sound absorption film layer 731.
  • a large number of micropores and/or gaps should be formed inside the flexible sound absorption material 732, and the micropores should be as fine as possible and uniformly distributed inside the material.
  • the micropores inside the material should be interpenetrated, rather than closed. The micropores are opened outwards, so that sound waves easily enter the micropores.
  • the flexible sound absorption material 732 includes one or more of an organic fiber material, a hemp cotton felt, an inorganic fiber material, glass wool, rock wool, mineral wool, urea-formaldehyde foamed plastic and carbamate foamed plastic.
  • the sound absorption material 73 includes a flexible sound absorption material 732, and the flexible sound absorption material 732 is in a compressed state and blocks each of the sound absorption holes 71b. That is, the flexible sound absorption material 732 is in a compressed and squeezed state, to minimize a flow rate of airflow passing through the sound absorption hole 71b and entering the silencing cavity 7a, thereby reducing flow rate loss of the airflow.
  • the hole depth of the sound absorption hole 71b is increased due to the protrusion 713, so that the flexible sound absorption material 732, especially a fibrous flexible sound absorption material 732 such as a sound absorption cotton, is not easy to enter the airflow channel 71a.
  • the fibrous flexible sound absorption material is a relatively fluffy material, and may be deformed after it is compressed, to enter the sound absorption hole 71b.
  • the fibrous flexible sound absorption material may enter the airflow channel, thereby affecting the air volume and possibly interfering with the impeller.
  • compression and squeezing manners of the flexible sound absorption material 732 are not limited.
  • the flexible sound absorption material 732 is squeezed between the first side plate 711 and the second side plate 721, that is, the silencing cavity 7a is filled with the flexible sound absorption material 732.
  • the sound absorption material 73 includes a partition plate 74, the partition plate 74 is arranged between the first side plate 711 and the second side plate 721, the flexible sound absorption material 732 is squeezed between the partition plate 74 and the first side plate 711, and an air interlayer is formed between the partition plate 74 and the second side plate 721.
  • the condenser 4 and the heating member may be located upstream of the airflow channel 71a in the airflow flowing direction, or may be located downstream of the airflow channel 71a.
  • references terms “an embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” or the like means that specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one of the embodiments or examples of the application.
  • schematic expressions of the above terms do not necessarily refer to the same embodiment or example.
  • the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.
  • those skilled in the art may combine different embodiments or examples described in the application and features of different embodiments or examples, without mutual conflict.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP21936734.9A 2021-04-13 2021-10-12 Appareil de couvercle arrière et dispositif de traitement de vêtements Pending EP4324976A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN202110394536.6A CN115198500A (zh) 2021-04-13 2021-04-13 一种后罩装置及衣物处理设备
CN202120745756.4U CN215441108U (zh) 2021-04-13 2021-04-13 一种后罩装置及衣物处理设备
PCT/CN2021/123225 WO2022217867A1 (fr) 2021-04-13 2021-10-12 Appareil de couvercle arrière et dispositif de traitement de vêtements

Publications (2)

Publication Number Publication Date
EP4324976A1 true EP4324976A1 (fr) 2024-02-21
EP4324976A4 EP4324976A4 (fr) 2024-08-28

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EP21936734.9A Pending EP4324976A4 (fr) 2021-04-13 2021-10-12 Appareil de couvercle arrière et dispositif de traitement de vêtements

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