CN111101353A - Clothes dryer - Google Patents
Clothes dryer Download PDFInfo
- Publication number
- CN111101353A CN111101353A CN202010023767.1A CN202010023767A CN111101353A CN 111101353 A CN111101353 A CN 111101353A CN 202010023767 A CN202010023767 A CN 202010023767A CN 111101353 A CN111101353 A CN 111101353A
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- CN
- China
- Prior art keywords
- noise reduction
- clothes dryer
- air inlet
- air outlet
- sub
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- 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
-
- 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
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
Abstract
The invention belongs to the field of clothes treatment equipment, and particularly discloses a clothes dryer which comprises a box body, wherein an air inlet and an air outlet are formed in the box body, and the air inlet and the air outlet respectively extend towards the interior of the box body to form an air inlet pipeline and an air outlet pipeline with certain lengths; and the noise reduction module is arranged in the air inlet pipeline and/or the air outlet pipeline and is used for reducing noise in the air inlet pipeline and/or the air outlet pipeline. The noise of the clothes dryer is collected in the air inlet pipeline and the air outlet pipeline, and the noise reduction modules are respectively arranged in the air inlet pipeline and the air outlet pipeline, so that the running noise of the clothes dryer is reduced in an active noise reduction mode.
Description
Technical Field
The invention belongs to the field of clothes treatment equipment, and particularly relates to a clothes dryer.
Background
With the development of economy and the improvement of the requirements of people on the quality of life, noise pollution is more and more difficult to tolerate. However, many devices generate noise, particularly household appliances, which operate in a human home environment, and the noise of the household appliances becomes a main noise source in the home environment.
The noise reduction of the household appliance and the noise reduction of other equipment have no essential difference on the noise reduction technology, the common noise reduction means is divided into passive noise reduction and active noise reduction, the passive noise reduction technology mainly utilizes the sound insulation and the sound absorption performance of materials to reduce noise, the noise is more effective for medium and high frequency noise, but the low frequency noise attenuation is slow, the penetrating power is strong, the diffraction is easy, and the effect of reducing the low frequency noise by using the passive means is difficult to achieve. Active noise reduction, also known as active noise control, is to generate noise reduction sound waves with opposite phases to external noise through an active noise reduction system, so as to neutralize the energy of the noise and realize the effect of reducing the noise, and for low-frequency noise, active noise reduction calculation is easier to control, and compared with a passive noise reduction technology, active noise reduction is more effective in reducing the low-frequency noise.
The basic principle of active noise reduction is simple, but the sound sources of actual products are various, the external sound field of the products is complex, the noise reduction effect is achieved at each position of the sound field, the difficulty is high, a plurality of loudspeakers are required to be used for carrying out multi-channel control on multi-order sound cavity modes, and the algorithm is complex. The product of carrying on the initiative and falling the module of making an uproar has the initiative and falls the earphone of making an uproar and the car of making an uproar actively at present, and the earphone of making an uproar falls to the point sound source voluntarily, and it is compared with the space sound field and fall the noise, and the complexity greatly reduces, and the car of making an uproar falls.
For active noise reduction of a space sound field, a feasible application scene is to perform active noise reduction control on a ventilation pipeline with a sound field boundary.
The existing active noise reduction patent of household appliances is only the application of the basic active noise reduction principle to the washing machine, but no specific scheme exists, and the invention provides an active noise reduction structure of the clothes dryer and a corresponding active noise reduction module layout scheme aiming at the clothes dryer and carrying out active noise reduction control on an air inlet and an air outlet.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a clothes dryer, which reduces the drying noise of the clothes dryer by reducing low-frequency noise through an active noise reduction method.
To solve the above technical problem, the present invention provides a clothes dryer comprising
The air inlet and the air outlet respectively extend towards the interior of the box body to form an air inlet pipeline and an air outlet pipeline with certain lengths;
and the noise reduction module is arranged in the air inlet pipeline and/or the air outlet pipeline and is used for reducing noise in the air inlet pipeline and/or the air outlet pipeline.
Further preferably, the flow path of the air inlet pipeline and/or the air outlet pipeline is divided into a plurality of mutually independent sub-flow paths, and a noise reduction module is respectively arranged in each sub-flow path.
Further preferably, the Frequency of the acoustic cavity mode of each sub-flow path can be calculated by the following formula:
wherein: lx, Ly and Lz are respectively the longitudinal, transverse and vertical sound cavity sizes of each sub-flow path, c is the sound velocity, and i (0,1, 2.), j (0,1, 2.) and k (0,1, 2.) respectively represent the orders of the modes in three directions.
Further preferably, the cross sections of the sub-flow paths are in a fan shape, the top points of the fan shape are located at the circle centers of the cross sections of the air inlet pipeline and/or the air outlet pipeline, and adjacent sub-flow paths are separated through the blocking ribs.
Further preferably, the cross sections of the sub-flow paths are concentric circles, and blocking ribs are arranged between adjacent sub-flow paths at intervals along the radial direction of the concentric circles.
Further preferably, the cross sections of the sub-flow paths are of a grid structure, and the grid structure is formed by longitudinally and transversely staggering a plurality of blocking ribs.
Further preferably, the cross-sections of the several sub-flow paths are equal in area.
Further preferably, the barrier rib is made of a sound absorbing material.
Further preferably, the noise reduction module comprises a reference microphone, a speaker and a controller, and the controller is connected with the reference microphone and the speaker respectively.
Further preferably, the noise reduction module further comprises an error sensor, the error sensor is connected with the controller, the error sensor analyzes the noise reduction effect and feeds back the analysis result to the controller, and the controller controls the loudspeaker to adjust the sound signal emitted by the loudspeaker according to the feedback result of the error sensor.
Further, it is preferable that the noise reduction modules in the air inlet pipeline and the air outlet pipeline are independently controlled by respective controllers, or are controlled by the same controller.
Further, it is preferable that the noise reduction modules in each sub-flow path are independently controlled by respective controllers, or are separately controlled by the same controller.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the noise of the clothes dryer is collected in the air inlet pipeline and the air outlet pipeline, and the noise reduction modules are respectively arranged in the air inlet pipeline and the air outlet pipeline, so that the running noise of the clothes dryer is reduced in an active noise reduction mode.
2. The dryer of the invention improves the frequency value of the mode of the sound cavity by dividing the flow path of the air inlet pipeline and the air outlet pipeline into a plurality of sub-flow paths, and the noise reduction module is arranged in each sub-flow path, so that the noise reduction effect of active noise reduction is improved.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1: the schematic diagram of the air inlet and the air outlet of the clothes dryer is shown in the embodiment of the invention;
FIG. 2: is a schematic diagram of a rectangular sound cavity;
fig. 3 to 4: the clothes dryer is provided with a schematic diagram of an air inlet pipeline and an air outlet pipeline;
FIG. 5: the layout of the noise reduction module is shown in the embodiment of the invention;
fig. 6-7 are: the first air duct partition diagram of the embodiment of the invention;
FIG. 8 is a diagram of: the second air duct division schematic diagram of the embodiment of the invention;
FIG. 9 is a diagram of: the third air duct of the embodiment of the invention is schematically divided;
wherein: 1. a box body; 11. an air inlet; 12. an air outlet; 111. an air inlet pipeline; 121. an air outlet pipeline; 1111. a sub-flow path; 1112. and (5) blocking ribs.
2. A noise reduction module; 21. error sensing; 22. a speaker; 23. a reference sensor; 24. controller
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The clothes dryer shown in fig. 1 comprises a cabinet 1, wherein the cabinet 1 is provided with an air inlet 11 and an air outlet 12, air enters the clothes dryer through the air inlet 11, after being heated by a heating wire, hot air is introduced into the cabinet 1 of the clothes dryer to dry clothes, and the air with water vapor is discharged out of the clothes dryer through the air outlet 12. The main running noise of the clothes dryer is fan noise, belt noise and friction noise of a clothes drying cylinder and a friction plate, one part of the noise is transmitted out through the clothes dryer box body 1, most of the noise is transmitted out through the air inlet 11 and the air outlet 12, passive noise reduction is implemented at the air inlet 11 and the air outlet 12, the air quantity and the performance of the clothes dryer can be influenced, active noise reduction control is carried out at the air inlet 11 and the air outlet 12, and the noise of the clothes dryer can be greatly reduced on the basis that the influence on the air quantity is reduced as much as possible. The active noise reduction of the space sound field is difficult to implement, and the pipeline structure with the acoustic boundary constraint reduces the active noise reduction complexity and can obtain a better noise reduction effect.
An air inlet pipeline 111 and an air outlet pipeline 121 (see fig. 3) with a certain length are respectively formed by extending the air inlet 11 and the air outlet 12 towards the interior of the box body 1, the noise in the clothes dryer is collected in the pipelines, and the active noise reduction module 2 is placed in the air inlet pipeline 111 and the air outlet pipeline 121 to implement active noise reduction, so that the noise of the clothes dryer can be obviously reduced.
As shown in fig. 2, the acoustic mode shape of the rectangular acoustic cavity can be described by longitudinal, transverse, vertical, or a combination of different directions, for example, the sound pressure of the longitudinal first-order mode is mainly distributed along the longitudinal direction, and the sound pressure is not changed along other directions, and the modal frequency of the acoustic cavity can be calculated by the following formula:
the method comprises the following steps that Lx, Ly and Lz are respectively the size of a longitudinal sound cavity, a transverse sound cavity and a vertical sound cavity, c is sound velocity, i (0,1, 2.), j (0,1, 2.), and k (0,1, 2.) respectively represent the order of the modes in three directions, theoretical frequency values of the modes of the sound cavities combined along the longitudinal direction, the transverse direction, the vertical direction or different directions can be obtained through formula calculation, and the frequency values of the modes of the sound cavities can be improved through reduction of the geometric size of the sound cavities.
Based on the theory, the smaller the geometric dimension of the pipeline is, the simpler the mode of the acoustic cavity is, and the closer the mode is to the acoustic cavity of the pipeline; and the higher the frequency of the first-order sound cavity mode is, the larger the bandwidth of the frequency band which can be processed by active noise reduction is. Therefore, the flow path of the air inlet pipeline 111 and the air outlet pipeline 121 of the clothes dryer is physically divided into a plurality of mutually independent sub-flow paths, and the noise reduction module 2 is respectively arranged in each sub-flow path. The acoustic cavity modal Frequency of each sub-flow path may be calculated by the following equation:
wherein: lx, Ly and Lz are respectively the longitudinal, transverse and vertical sound cavity sizes of each sub-flow path, c is the sound velocity, and i (0,1, 2.), j (0,1, 2.) and k (0,1, 2.) respectively represent the orders of the modes in three directions.
Taking sub-flow path 1111 of air-supply line 111 as an example, sub-flow path 1111 has the following embodiments:
the first embodiment is as follows: as shown in fig. 6 and 7, the cross section of each of the sub-flow paths 1111 is a sector, the vertex of the sector is located at the center of the cross section of the air inlet pipe 111, and the adjacent sub-flow paths 1111 are separated by the barrier rib 1112.
In the second embodiment, as shown in fig. 8, the cross sections of the sub-flow paths 1111 are concentric circles, and the blocking ribs 1112 are disposed between the adjacent sub-flow paths at intervals along the radial direction of the concentric circles.
In the third embodiment, as shown in fig. 9, the cross sections of the sub-channels 1111 are in a grid structure, and the grid structure is formed by criss-cross arrangement of a plurality of blocking ribs 1112.
On the basis of the above specific embodiment, in order to obtain a balanced noise reduction effect for each sub-flow path and ensure the noise reduction stability of the whole air inlet pipeline or air outlet pipeline, it is preferable that the cross sections of the sub-flow paths 1111 have the same area. Meanwhile, the barrier ribs 1112 located between the adjacent sub-flow paths 1111 are made of a sound absorbing material, thereby increasing the suction effect.
Further, on the basis of the above scheme, the noise reduction module 2 includes a reference microphone 23, a speaker 22 and a controller 24, and the controller 24 is connected to the reference microphone 23 and the speaker 22 respectively. The reference microphone 23 is located closest to the sound source and is used to pick up the noise signal, the speaker 22 is used to emit sound, and the controller 24 analyzes and calculates the picked-up noise signal to determine what sound the speaker 22 emits to cancel the noise, and then directs the speaker 22 to emit sound.
The noise reduction module 2 further comprises an error sensor 21, the error sensor 21 is connected with a controller 24, the error sensor 21 analyzes the noise reduction effect and feeds back the analysis result to the controller 24, and the controller 24 controls the loudspeaker 22 to adjust the sound signal emitted by the loudspeaker 22 according to the feedback result of the error sensor 21. The error microphone picks up the noise reduction effect of the superposition of the original noise signal and the sound signal sent by the loudspeaker 22 in the target noise reduction area, if the noise reduction effect is not good, a feedback signal is sent to the controller 24, the controller 24 changes the control signal sent to the loudspeaker 22, and the noise reduction effect is better
The noise reduction modules 2 in the air inlet pipeline 111 and the air outlet pipeline 121 of the present embodiment are independently controlled by respective controllers 24, or are respectively controlled by the same controller 24, or the noise reduction modules 2 in each sub-flow path are independently controlled by respective controllers 24, or are respectively controlled by the same controller 24. As shown in fig. 5, a reference microphone 23 and a speaker 22 are separately disposed in each sub-flow path 1111, and each flow path may (but need not) share one set of active noise reduction control system, so that the noise reduction effect and the noise reduction bandwidth of the dryer active noise reduction system can be significantly improved.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A clothes dryer is characterized by comprising
The air inlet and the air outlet respectively extend towards the interior of the box body to form an air inlet pipeline and an air outlet pipeline with certain lengths;
and the noise reduction module is arranged in the air inlet pipeline and/or the air outlet pipeline and is used for reducing noise in the air inlet pipeline and/or the air outlet pipeline.
2. The clothes dryer of claim 1 wherein the flow path of the air inlet duct and/or the air outlet duct is divided into a plurality of independent sub-flow paths, and a noise reduction module is disposed in each sub-flow path.
3. The clothes dryer of claim 2 wherein the acoustic cavity modal Frequency of each sub-flow path is calculated by the formula:
wherein: lx, Ly and Lz are respectively the longitudinal, transverse and vertical sound cavity sizes of each sub-flow path, c is the sound velocity, and i (0,1, 2.), j (0,1, 2.) and k (0,1, 2.) respectively represent the orders of the modes in three directions.
4. The clothes dryer of claim 2, wherein the cross section of the plurality of sub-flow paths is in a fan shape, the vertex of the fan shape is located at the center of the cross section of the air inlet pipeline and/or the air outlet pipeline, and adjacent sub-flow paths are separated by a blocking rib.
5. The clothes dryer of claim 4 wherein the cross-sectional areas of the plurality of sub-flow paths are equal.
6. The clothes dryer of claim 4 wherein said ribs are made of sound absorbing material.
7. The clothes dryer of any one of claims 1 to 6, wherein the noise reduction module comprises a reference microphone, a speaker and a controller, and the controller is connected with the reference microphone and the speaker respectively.
8. The clothes dryer of claim 7, wherein the noise reduction module further comprises an error sensor, the error sensor is connected to the controller, the error sensor analyzes the noise reduction effect and feeds back the analysis result to the controller, and the controller controls the speaker to adjust the sound signal emitted by the speaker according to the feedback result of the error sensor.
9. The clothes dryer of claim 8 wherein the noise reduction modules in the air inlet duct and the air outlet duct are independently controlled by separate controllers, or are separately controlled by the same controller.
10. The clothes dryer of claim 8 wherein the noise reduction modules in each of the sub-circuits are independently controlled by a respective controller or are separately controlled by the same controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010023767.1A CN111101353A (en) | 2020-01-09 | 2020-01-09 | Clothes dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010023767.1A CN111101353A (en) | 2020-01-09 | 2020-01-09 | Clothes dryer |
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| Publication Number | Publication Date |
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| CN111101353A true CN111101353A (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010023767.1A Pending CN111101353A (en) | 2020-01-09 | 2020-01-09 | Clothes dryer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265860A (en) * | 2021-04-16 | 2021-08-17 | 安徽舒森定制家居有限公司 | Intelligent clothes airing device with drying function |
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| JP2007313063A (en) * | 2006-05-26 | 2007-12-06 | Matsushita Electric Ind Co Ltd | Washing drying machine |
| CN101851848A (en) * | 2009-06-03 | 2010-10-06 | 南京乐金熊猫电器有限公司 | Hot air supply device and clothing processing device |
| CN105937173A (en) * | 2016-06-29 | 2016-09-14 | 无锡小天鹅股份有限公司 | Air exhaust assembly and clothes dryer or washing and drying integrated machine with same |
| JP2017068231A (en) * | 2015-09-30 | 2017-04-06 | パナソニックＩｐマネジメント株式会社 | Blower |
| CN107420680A (en) * | 2017-08-23 | 2017-12-01 | 武汉理工大学 | A kind of artificial cochlea's silencer for air pipeline Noise measarement |
| CN108954508A (en) * | 2018-06-15 | 2018-12-07 | 青岛海信日立空调系统有限公司 | Wind pipe type indoor unit |
| CN109166568A (en) * | 2018-11-19 | 2019-01-08 | 济南浪潮高新科技投资发展有限公司 | A kind of low-power consumption active active noise reduction system and method for fan |
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2020
- 2020-01-09 CN CN202010023767.1A patent/CN111101353A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007313063A (en) * | 2006-05-26 | 2007-12-06 | Matsushita Electric Ind Co Ltd | Washing drying machine |
| CN101851848A (en) * | 2009-06-03 | 2010-10-06 | 南京乐金熊猫电器有限公司 | Hot air supply device and clothing processing device |
| JP2017068231A (en) * | 2015-09-30 | 2017-04-06 | パナソニックＩｐマネジメント株式会社 | Blower |
| CN105937173A (en) * | 2016-06-29 | 2016-09-14 | 无锡小天鹅股份有限公司 | Air exhaust assembly and clothes dryer or washing and drying integrated machine with same |
| CN107420680A (en) * | 2017-08-23 | 2017-12-01 | 武汉理工大学 | A kind of artificial cochlea's silencer for air pipeline Noise measarement |
| CN108954508A (en) * | 2018-06-15 | 2018-12-07 | 青岛海信日立空调系统有限公司 | Wind pipe type indoor unit |
| CN109166568A (en) * | 2018-11-19 | 2019-01-08 | 济南浪潮高新科技投资发展有限公司 | A kind of low-power consumption active active noise reduction system and method for fan |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265860A (en) * | 2021-04-16 | 2021-08-17 | 安徽舒森定制家居有限公司 | Intelligent clothes airing device with drying function |
| CN113265860B (en) * | 2021-04-16 | 2023-10-20 | 安徽舒森定制家居有限公司 | Intelligent clothes airing device with drying function |
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Application publication date: 20200505 |