CN113373658A - Noise reduction and fixing equipment for washing machine - Google Patents
Noise reduction and fixing equipment for washing machine Download PDFInfo
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- CN113373658A CN113373658A CN202110618736.5A CN202110618736A CN113373658A CN 113373658 A CN113373658 A CN 113373658A CN 202110618736 A CN202110618736 A CN 202110618736A CN 113373658 A CN113373658 A CN 113373658A
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- washing machine
- air bag
- noise reduction
- sound
- bottom end
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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
- 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
- D06F39/125—Supporting arrangements for the casing, e.g. rollers or legs
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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
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps
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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
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/48—Preventing or reducing imbalance or noise
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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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
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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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/58—Indications or alarms to the control system or to the user
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
本发明公开了一种洗衣机减噪音及固定设备，其包括防水底盘和稳定支腿，四个所述稳定支腿均匀连接于所述防水底盘底端，所述防水底盘和稳定支腿采用SMC材料一体成型制成，洗衣机放置于所述防水底盘顶端，所述稳定支腿内设置有减噪固定装置。本发明采用SMC材料制成，结构简单，操作方便，通过底盘和支腿一体成型，提高设备的机械性能和稳定性，通过减噪固定装置和橡胶垫片对洗衣机进行有效固定，减少洗衣机运行过程中产生的噪音，提高使用感受，减少对住户的影响。
The invention discloses a noise reduction and fixing device for a washing machine, which comprises a waterproof chassis and stabilizing legs, the four stabilizing legs are evenly connected to the bottom end of the waterproof chassis, and the waterproof chassis and the stabilizing legs are made of SMC material It is integrally formed, the washing machine is placed on the top of the waterproof chassis, and a noise reduction fixing device is arranged in the stable outrigger. The invention is made of SMC material, with simple structure and convenient operation. The chassis and the legs are integrally formed to improve the mechanical performance and stability of the equipment, and the noise reduction fixing device and the rubber gasket are used to effectively fix the washing machine, thereby reducing the running process of the washing machine. It can improve the use experience and reduce the impact on the residents.
Description
Technical Field
The invention relates to the technical field of washing machines, in particular to a noise reduction and fixing device for a washing machine.
Background
The washing machine is a cleaning appliance for washing clothes by using mechanical action generated by electric energy, and is divided into a household appliance and a collector according to the rated washing capacity, the washing machine usually rotates the washing machine at high speed to spin the clothes after washing, the existing washing machine generates severe vibration during spin-drying, so that the existing washing machine can generate great noise due to the vibration, the population of the social city is more and more at present, the vibration of the washing machine can influence the rest of downstairs residents, and the washing machine can generate great inconvenience in the use process. Therefore, in order to reduce the noise generated during the operation of the washing machine and reduce the impact on the household, it is necessary to design a noise reduction and fixing device for the washing machine.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a noise reduction and fixing device of a washing machine, which is made of SMC materials, has simple structure and convenient operation, improves the mechanical property and stability of the device by integrally forming a chassis and supporting legs, effectively fixes the washing machine by a noise reduction fixing device and a rubber gasket, reduces the noise generated in the operation process of the washing machine, improves the use feeling and reduces the influence on residents; it includes:
the washing machine comprises a waterproof chassis and four stable supporting legs, wherein the four stable supporting legs are uniformly connected to the bottom end of the waterproof chassis, the waterproof chassis and the stable supporting legs are made of SMC materials in an integrated forming mode, the washing machine is placed at the top end of the waterproof chassis, and noise reduction fixing devices are arranged in the stable supporting legs.
Preferably, the bottom end of the waterproof chassis is provided with a groove.
Preferably, a drain hole penetrates through the waterproof chassis, the edge of the drain hole is fixedly connected with a reinforcing rib, and the drain hole is connected with a drain hole of the washing machine through a pipeline.
Preferably, the bottom end of the stabilizing support leg is fixedly connected with a fixed flange, and the fixed flanges are transversely and longitudinally arranged in a staggered manner to form a grid structure.
Preferably, rubber gaskets are bonded to the bottom ends of the stabilizing support legs, and the rubber gaskets are evenly distributed in the grid-shaped structure formed by the fixed flanges.
Preferably, the noise reduction fixing device includes:
the shell is arranged in a groove at the top of the stabilizing leg, and the bottom of the shell is arranged in an inverted V shape;
the mounting block is fixedly connected to the center of the bottom end in the shell;
the mounting hole is formed in the center of the top end of the mounting block;
the rubber ring is bonded on the inner wall of the mounting hole, and the inner diameter of the rubber ring is suitable for the arrangement of the support leg at the bottom of the washing machine;
the soundproof cotton is filled between the shell and the mounting block;
the lug is fixedly connected to the side end of the shell;
the sliding hole is formed in the lug;
the side groove is formed in the side wall of the groove at the top of the stabilizing leg and is close to the lug;
the sliding rod is vertically connected into the side groove, the sliding rod penetrates through the sliding hole, and the size of the sliding rod is smaller than that of the sliding hole;
the air bag device is rotatably connected to the bottom end of the mounting block and arranged between the V-shaped plates of the shell.
Preferably, the airbag device includes:
the spherical connecting piece is rotatably connected to the bottom end of the mounting block;
the connecting rod is connected to the bottom end of the spherical connecting piece;
the connecting frame is arranged below the spherical connecting piece, and the connecting rod penetrates through the connecting frame and extends into the connecting frame;
the limiting block is fixedly connected to the bottom end of the connecting rod;
the spring is sleeved on the outer side of the connecting rod and connected between the limiting block and the inner wall of the connecting frame;
the four first air bags are uniformly connected to the side end of the connecting frame and connected with the V-shaped plate of the shell;
the second air bag is connected to the bottom end of the first air bag at the same time and is connected with the bottom end of the inner wall of the groove at the top of the stabilizing leg;
the controller is electrically connected with the inflator pump, and the inflator pump is connected with the first air bag and the second air bag.
Preferably, the controller calculates the maximum weight of the washing machine carried by the device according to a preset algorithm, and the preset algorithm comprises the following specific steps:
step A1, selecting the second air bags with the same specification, and determining that the axial stress and strain relation of the second air bag material is f (x) through a material mechanics test;
step a2, calculating an axial deformation of the second airbag when the second airbag is subjected to pressure as:
wherein Δ L is an axial deformation of the second airbag when bearing pressure, p is a preset gas working pressure in the second airbag, epsilon is a safety coefficient of the second airbag body, t is a thickness of the second airbag body, and r is a radius of the second airbag column section airbag body;
step a3, calculating the maximum weight of the washing machine carried by the device as:
wherein M is the maximum weight of the washing machine borne by the equipment, N is the number of the stabilizing support legs, B is the length of the pressure contact section of the cross section of the second air bag, and g is the gravity acceleration.
Preferably, the noise reduction and fixing device for a washing machine further comprises:
the fault prompting device comprises an alarm and an audio sampling device, wherein the alarm and the audio sampling device are electrically connected with the controller, the alarm is used for giving an alarm for the fault condition of equipment, the audio sampling device is used for collecting sound signals in the use process of the washing machine, the controller identifies and judges the fault sound of the equipment according to a preset algorithm, and the specific steps of the preset algorithm are as follows:
step A1, collecting sound signals in the use process of the washing machine through audio sampling equipment to obtain original audio signals x (n);
step A2, analyzing the frequency spectrum of the audio, selecting a cut-off frequency value, performing low-pass filtering processing on an original audio signal x (N), then performing normalization processing on the processed audio signal, and limiting the amplitude of an audio sample between [ -1 and 1], so as to obtain a sound signal s (k), wherein k is 1,2.. N, and N is the number of sampling frequencies;
step a3, fourier transforming the sound signal by the following formula:
wherein S isnIs the sound signal after Fourier transform, j is the unit of imaginary number;
step a4, calculating the power spectral density of the sound signal in different frequency ranges as:
wherein, WnFor the power of the sound signal in the nth frequency range, PiIs the power spectral density at frequency i, frFor frequency resolution, fstartTo the starting resolution, fendTo end resolution;
step A5, the controller judges the difference power spectral density of the sample sound and the standard sound, and controls the alarm according to the judgment result:
wherein FRU represents a control result, A represents alarm, B represents alarm closing, and C represents the maximum preset difference value of the power spectral density difference between the sample sound and the standard sound;
step a6, the alarm executes the control result.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the structure of the present invention;
FIG. 3 is a schematic sectional view of the noise reduction fixing device according to the present invention;
FIG. 4 is a schematic sectional view of the airbag device according to the present invention.
In the figure: 1. a waterproof chassis; 2. stabilizing the support legs; 11. a groove; 12. a drain hole; 21. fixing the flange; 22. a rubber gasket; 31. a housing; 32. mounting blocks; 33. mounting holes; 34. a rubber ring; 35. sound insulation cotton; 36. a lug; 37. a slide hole; 38. a side groove; 39. a slide bar; 310. a spherical connecting member; 311. a connecting rod; 312. a connecting frame; 313. a limiting block; 314. a spring; 315. a first air bag; 316. a second air bag.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1-4, the noise reduction and fixing device for a washing machine according to the present embodiment includes:
the waterproof structure comprises a waterproof chassis 1 and stable supporting legs 2, wherein the stable supporting legs 2 are evenly connected to the bottom end of the waterproof chassis 1, the waterproof chassis 1 and the stable supporting legs 2 are made of SMC materials in an integrated mode, a washing machine is placed at the top end of the waterproof chassis 1, and noise reduction fixing devices are arranged in the stable supporting legs 2.
The working principle of the invention is as follows:
the invention provides a noise reduction and fixing device of a washing machine, when in use, the washing machine is connected with a noise reduction fixing device in a stable supporting leg 2, the washing machine is placed above a waterproof chassis 1, the washing machine generates vibration when in use, the waterproof chassis 1 is firmly installed on the ground through the bottom end of the stable supporting leg 2, the noise reduction fixing device and a rubber gasket 22 at the bottom end of the stable supporting leg 2 are used for damping the washing machine, and the waterproof chassis 1 and the stable supporting leg 2 are integrally formed by adopting SMC materials, so that the mechanical performance and the stability of the device are improved.
The invention has the beneficial effects that:
the noise reduction and fixing equipment for the washing machine, provided by the invention, is made of SMC materials, is simple in structure and convenient to operate, the mechanical performance and the stability of the equipment are improved by integrally forming the chassis and the supporting legs, the washing machine is effectively fixed by the noise reduction fixing device and the rubber gasket 22, the noise generated in the operation process of the washing machine is reduced, the use feeling is improved, and the influence on residents is reduced.
In one embodiment, the waterproof chassis 1 and the stabilizing leg 2 are integrally formed from SMC material.
The working principle and the beneficial effects of the technical scheme are as follows:
SMC is a sheet molding compound, which is an unsaturated polyester glass fiber composite material prepared by using unsaturated polyester resin as a binder, adding glass fiber, filler, pigment and other auxiliary agents, impregnating glass fiber yarns, and covering two surfaces with films. The SMC is molded at a time through high temperature, has light weight, excellent electrical insulation performance, mechanical performance, thermal stability and chemical corrosion resistance, long service life, good sealing performance and safety and attractive appearance.
As shown in fig. 1, in one embodiment, the bottom end of the waterproof chassis 1 is provided with a groove 11.
The working principle and the beneficial effects of the technical scheme are as follows:
the bottom end of the waterproof chassis 1 is provided with the groove 11, the groove 11 is formed according to the position of the stabilizing support leg 2, the groove 11 realizes the weight reduction of the waterproof chassis 1 while the waterproof chassis 1 is guaranteed to effectively support the washing machine, so that the waterproof chassis 1 is lighter and the production cost is reduced.
As shown in fig. 1, in one embodiment, a drain hole 12 is formed through the waterproof chassis 1, a reinforcing rib is fixedly connected to the edge of the drain hole 12, and the drain hole 12 is connected to a drain hole of a washing machine through a pipeline.
The working principle and the beneficial effects of the technical scheme are as follows:
when the washing machine is used, water needs to be drained, the water drain hole 12 is arranged in a penetrating mode on the washing machine pipeline, the water drain pipeline can smoothly penetrate through the waterproof chassis 1, the reinforcing ribs guarantee the stability of the position of the water drain hole 12 on the waterproof chassis 1, the mechanical property of the equipment is improved, and the water drain hole 12 can be prevented from damaging the pipeline when the washing machine vibrates.
As shown in fig. 1, in one embodiment, a fixed rib 21 is fixedly connected to the bottom end of the stabilizing leg 2, and a plurality of the fixed ribs 21 are arranged in a staggered manner in the transverse and longitudinal directions to form a grid-like structure.
The working principle and the beneficial effects of the technical scheme are as follows:
fixed flange 21 connect in stabilize 2 bottoms of landing leg and form latticedly, for rubber gasket 22 provides installation space, guarantee stabilize the plane degree of 2 bottoms of landing leg, prevent that the inhomogeneous emergence of rubber gasket 22 atress is crooked, improve equipment's installation stationarity.
As shown in fig. 1, in one embodiment, a rubber gasket 22 is adhered to the bottom end of the stabilizing leg 2, and a plurality of rubber gaskets 22 are uniformly arranged in the grid-like structure formed by the fixing ribs 21.
The working principle and the beneficial effects of the technical scheme are as follows:
As shown in fig. 3 and 4, in one embodiment, the noise-reducing fixing device includes:
the shell 31 is installed in a groove in the top of the stabilizing leg 2, and the bottom of the shell 31 is arranged in an inverted V shape;
a mounting block 32, wherein the mounting block 31 is fixedly connected to the center of the bottom end of the shell 31;
the mounting hole 33 is formed in the center of the top end of the mounting block 33;
the rubber ring 34 is adhered to the inner wall of the mounting hole 33, and the inner diameter of the rubber ring 34 is suitable for the arrangement of the bottom support leg of the washing machine;
the lug 36, the lug 36 is fixedly connected to the side end of the shell 31;
the sliding hole 37 is formed in the lug 36;
a side groove 38, said side groove 38 opening into the top groove sidewall of said stabilizing leg 2, said side groove 38 being disposed adjacent to said ledge 36;
the sliding rod 39 is vertically connected into the side groove 38, the sliding rod 39 penetrates through the sliding hole 37, and the size of the sliding rod 39 is smaller than that of the sliding hole 37;
an air bag device rotatably coupled to the bottom end of the mounting block 32, the air bag device being disposed between the V-shaped plates of the housing 31.
The working principle and the beneficial effects of the technical scheme are as follows:
when the noise reduction fixing device is used, the bottom supporting leg of a washing machine is arranged in the rubber ring 34 of the mounting hole 33, the rubber ring 34 is used for fixing the bottom supporting leg of the washing machine, the contact friction force is improved, the washing machine is prevented from moving in the use process, sound insulation cotton 35 is arranged between the shell 31 and the mounting block 32, noise generated by vibration of the washing machine is effectively absorbed, the influence of the operation process of the washing machine on the environment is reduced, a lug 36 is arranged on the outer side of the shell 31, the shell 31 is limited in movement through the sliding hole 37 in the lug 36 and the sliding rod 39 on the stabilizing supporting leg 2, the shell 31 is connected with the stabilizing supporting leg 2, the air bag device is rotatably connected to the bottom end of the mounting block 32, and the position of the shell 1 is finely adjusted through inflation and exhaust of the air bag device.
Through the structure design, set up noise reduction fixing device in 2 top recesses of stable landing leg, simple structure, simple to operate effectively realizes washing machine's fixed, adsorbs the noise that produces in the washing machine use, improve equipment's the performance of making an uproar that falls, and the practicality is better.
As shown in fig. 3 and 4, in one embodiment, the airbag device includes:
the spherical connecting piece 310 is rotatably connected to the bottom end of the mounting block 32;
a connecting rod 311, wherein the connecting rod 311 is connected to the bottom end of the spherical connecting member 310;
the connecting frame 312 is arranged below the spherical connecting piece 310, and the connecting rod 311 penetrates through the connecting frame 312 and extends into the connecting frame 312;
the limiting block 313 is fixedly connected to the bottom end of the connecting rod 311;
the spring 314 is sleeved outside the connecting rod 311, and the spring 314 is connected between the limiting block 313 and the inner wall of the connecting frame 312;
four first air bags 315, wherein the four first air bags 315 are uniformly connected to the side end of the connecting frame 312, and the first air bags 315 are connected with the V-shaped plate of the shell 31;
a second air bag 316, wherein the second air bag 316 is simultaneously connected with the bottom end of the first air bag 315, and the second air bag 316 is connected with the bottom end of the inner wall of the groove at the top of the stabilizing leg 2;
a controller electrically connected to the inflator, which is connected to the first air bag 315 and the second air bag 316.
The working principle and the beneficial effects of the technical scheme are as follows:
when the air bag device is used, the air bag device is controlled by a controller, because the size of the sliding rod 39 is smaller than that of the sliding hole 37, the sliding rod 39 is in sliding connection with the sliding hole 37, the shell 31 has moving allowance in both horizontal and vertical directions, after the bottom support leg of the washing machine is installed in the installation hole 33, according to the deflection condition of the washing machine, an inflator pump is started to inflate one or more first air bags 315, the first air bags 315 are inflated and expanded, and one side of the V-shaped plate of the shell 31 is pushed to rotate by a small angle, so that the installation angle of the support leg of the washing machine is adjusted; when the height of the washing machine needs to be adjusted, the inflator pump is started to inflate the second air bag 316, the second air bag 316 is inflated and expanded, the shell 31 is jacked up, the lug 36 moves upwards along the sliding rod 39, and the washing machine is driven to move upwards; when the washing machine vibrates during use, the shell 31 is driven to vibrate, the first air bag 315 and the second air bag 316 buffer the shell 31, the shell 31 is prevented from colliding with the stabilizing support leg 2, and noise generated in the use process of the washing machine is further reduced.
Through the above structural design, set up the gasbag device in casing 31 bottom, fill the gassing through the inflation of first gasbag 315 of controller control and second gasbag 316, highly realize the fine setting to washing machine's installation angle, guarantee that washing machine installation angle and highly accurate are suitable, convenient to use, simultaneously, cushion the vibration that produces in the washing machine use through the gasbag, effectively reduce washing machine's noise, reduce the influence to the environment.
In one embodiment, the controller calculates the maximum weight of the washing machine carried by the apparatus according to a preset algorithm, which comprises the following specific steps:
step A1, selecting the second air bag 316 with the same specification, and determining that the axial stress and strain relation of the material of the second air bag 316 is f (x) through a material mechanics test;
step a2, calculating the axial deformation of the second airbag 316 when it is subjected to pressure as:
wherein Δ L is an axial deformation of the second airbag 316 under pressure, p is a preset gas working pressure in the second airbag 316, e is a safety factor of the airbag body of the second airbag 316, t is a thickness of the airbag body of the second airbag 316, and r is a radius of a pillar airbag body of the second airbag 316;
step a3, calculating the maximum weight of the washing machine carried by the device as:
wherein M is the maximum weight of the washing machine carried by the equipment, N is the number of the stabilizing legs 2, B is the length of the pressed contact section of the cross section of the second air bag 316, and g is the gravity acceleration.
The working principle and the beneficial effects of the technical scheme are as follows:
when the device is used, the second airbag 316 plays a main supporting role, and the supporting force provided to the washing machine is different according to different specifications of the second airbag 316, so that according to a preset algorithm, firstly, the second airbag 316 is regarded as a cylindrical thin-wall pressure container, and the axial stress and strain relation of the material of the second airbag 316 is determined by performing a material mechanics test on the second airbag 316; then, according to the preset gas working pressure of the second air bag 316, calculating the axial deformation of the second air bag 316; and finally, calculating to obtain the maximum weight of the washing machine carried by the equipment.
The maximum weight of the washing machine borne by the equipment is calculated through a preset algorithm, a theoretical basis is provided for the bearing capacity of the equipment, the use range of the equipment is reasonably estimated, the damage of the equipment caused by the overlarge weight of the washing machine is prevented, meanwhile, the adaptive equipment can be designed according to the weight of the washing machine, the designability of the equipment is improved, and the phenomenon of air bag damage is avoided.
In one embodiment, the noise reduction and fixing apparatus for a washing machine further includes:
the fault prompting device comprises an alarm and an audio sampling device, wherein the alarm and the audio sampling device are electrically connected with the controller, the alarm is used for giving an alarm for the fault condition of equipment, the audio sampling device is used for collecting sound signals in the use process of the washing machine, the controller identifies and judges the fault sound of the equipment according to a preset algorithm, and the specific steps of the preset algorithm are as follows:
step A1, collecting sound signals in the use process of the washing machine through audio sampling equipment to obtain original audio signals x (n);
step A2, analyzing the frequency spectrum of the audio, selecting a cut-off frequency value, performing low-pass filtering processing on an original audio signal x (N), then performing normalization processing on the processed audio signal, and limiting the amplitude of an audio sample between [ -1 and 1], so as to obtain a sound signal s (k), wherein k is 1,2.. N, and N is the number of sampling frequencies;
step a3, fourier transforming the sound signal by the following formula:
wherein S isnIs the sound signal after Fourier transform, j is the unit of imaginary number;
step a4, calculating the power spectral density of the sound signal in different frequency ranges as:
wherein, WnFor sound signals in the nth frequency rangePower in the enclosure, PiIs the power spectral density at frequency i, frFor frequency resolution, fstartTo the starting resolution, fendTo end resolution;
step A5, the controller judges the difference power spectral density of the sample sound and the standard sound, and controls the alarm according to the judgment result:
wherein FRU represents a control result, A represents alarm, B represents alarm closing, and C represents the maximum preset difference value of the power spectral density difference between the sample sound and the standard sound;
step a6, the alarm executes the control result.
The working principle and the beneficial effects of the technical scheme are as follows:
in the using process of the washing machine, abnormal sound can occur due to equipment failure and the like, the judgment is carried out only through sound heard by a user, ear fatigue and damage are easily caused, sound fragments cannot be memorized for a long time, partial sound is omitted, the washing machine is generally required to be stopped and disassembled to find out obstacle sources, therefore, through the calculation method, the sound generated when the washing machine operates is firstly collected through an audio sampling device, then proper cut-off frequency is selected, the original audio signal is filtered, the interference of high-frequency noise in audio is eliminated, the audio signal is normalized, the difference of sound intensities of different sound samples is eliminated, then the Hounsfield cause signal is subjected to Fourier transform, the power spectral density of the sound signal in different frequency ranges is calculated, and finally, the power spectral density of the difference between the sample sound and standard sound is judged, when the difference value is larger than the preset value, the sound of the sample is abnormal, the washing machine or equipment is in fault, the alarm gives an alarm and needs to be stopped for maintenance, and when the difference value is within the range of the preset value, the abnormal condition is indicated.
Through the above calculation method, the sound generated when the washing machine operates is collected through the audio sampling device, the sound is recorded by adopting an electronic means, the collected sound signal is processed and judged, abnormal sound of the device is effectively identified, warning is given to users, analysis is fine, judgment is accurate, sound data is stored rapidly, errors of manual judgment are reduced, and the reliability of the washing machine and the device in use is improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. A noise reduction and fixing apparatus of a washing machine, comprising:
waterproof chassis (1) and stable landing leg (2), four stable landing leg (2) evenly connect in waterproof chassis (1) bottom, waterproof chassis (1) and stable landing leg (2) adopt SMC material integrated into one piece to make, and washing machine place in waterproof chassis (1) top, be provided with noise reduction fixing device in stable landing leg (2).
2. A washing machine noise reduction and fixing device according to claim 1, characterized in that the bottom of the waterproof chassis (1) is provided with a groove (11).
3. The noise reduction and fixation device of the washing machine as claimed in claim 1, wherein a drain hole (12) is formed on the waterproof chassis (1) in a penetrating manner, a reinforcing rib is fixedly connected to the edge of the drain hole (12), and the drain hole (12) is connected with the drain hole of the washing machine through a pipeline.
4. A washing machine noise reduction and fixing device according to claim 1, characterized in that the bottom end of the stabilizing leg (2) is fixedly connected with a fixing rib (21), and a plurality of fixing ribs (21) are arranged in a criss-cross manner in the horizontal and vertical directions to form a grid structure.
5. A washing machine noise reduction and fixing device according to claim 4, characterized in that the bottom end of the stabilizing leg (2) is bonded with a rubber gasket (22), and a plurality of rubber gaskets (22) are uniformly arranged in the grid structure formed by the fixing ribs (21).
6. A noise-reducing and fixing apparatus of a washing machine as claimed in claim 1, wherein the noise-reducing fixing device comprises:
the shell (31) is mounted in a groove in the top of the stabilizing leg (2), and the bottom of the shell (31) is arranged in an inverted V shape;
the mounting block (32), the said mounting block (31) is fixedly connected to the bottom center in the said body (31);
the mounting hole (33), the mounting hole (33) is opened in the center of the top end of the mounting block (33);
the rubber ring (34) is adhered to the inner wall of the mounting hole (33), and the inner diameter of the rubber ring (34) is suitable for the arrangement of the bottom support leg of the washing machine;
soundproof cotton (35), wherein the soundproof cotton (35) is filled between the shell (31) and the mounting block (32);
the lug (36), the lug (36) is fixedly connected to the side end of the shell (31);
the sliding hole (37) is formed in the lug (36);
a side groove (38), wherein the side groove (38) is arranged on the side wall of the top groove of the stabilizing leg (2), and the side groove (38) is arranged close to the lug (36);
the sliding rod (39) is vertically connected into the side groove (38), the sliding rod (39) is arranged in a penetrating mode through the sliding hole (37), and the size of the sliding rod (39) is smaller than that of the sliding hole (37);
an airbag device rotatably connected to a bottom end of the mounting block (32), the airbag device being disposed between the V-shaped plates of the housing (31).
7. A noise-reducing and fixing apparatus for a washing machine as claimed in claim 1, wherein the air bag unit comprises:
the spherical connecting piece (310), the spherical connecting piece (310) is rotatably connected to the bottom end of the mounting block (32);
the connecting rod (311), the connecting rod (311) is connected to the bottom end of the spherical connecting piece (310);
the connecting frame (312) is arranged below the spherical connecting piece (310), and the connecting rod (311) penetrates through the connecting frame (312) and extends into the connecting frame (312);
the limiting block (313), the said limiting block (313) is fixedly connected to the bottom end of the said tie rod (311);
the spring (314) is sleeved on the outer side of the connecting rod (311), and the spring (314) is connected between the limiting block (313) and the inner wall of the connecting frame (312);
the four first air bags (315) are uniformly connected to the side end of the connecting frame (312), and the first air bags (315) are connected with the V-shaped plate of the shell (31);
a second air bag (316), wherein the second air bag (316) is simultaneously connected with the bottom end of the first air bag (315), and the second air bag (316) is connected with the bottom end of the inner wall of the top groove of the stabilizing leg (2);
a controller electrically connected to an inflator connected to the first air cell (315) and the second air cell (316).
8. The washing machine noise reduction and fixing device as claimed in claim 7, wherein the controller calculates the maximum weight of the washing machine carried by the device according to a preset algorithm, the preset algorithm comprising the following specific steps:
a1, selecting the second air bags (316) with the same specification, and determining that the axial stress and strain relation of the materials of the second air bags (316) is f (x) through a material mechanics test;
step A2, calculating the axial deformation of the second air bag (316) when bearing pressure as follows:
wherein, Δ L is the axial deformation of the second air bag (316) when bearing pressure, p is the preset gas working pressure in the second air bag (316), epsilon is the safety coefficient of the second air bag (316) bag body, t is the thickness of the second air bag (316) bag body, and r is the radius of the second air bag (316) column section bag body;
step a3, calculating the maximum weight of the washing machine carried by the device as:
wherein M is the maximum weight of the washing machine carried by the equipment, N is the number of the stabilizing legs (2), B is the length of the pressure contact section of the cross section of the second air bag (316), and g is the gravity acceleration.
9. A noise-reducing and fixing apparatus of a washing machine as claimed in claim 7, further comprising:
the fault prompting device comprises an alarm and an audio sampling device, wherein the alarm and the audio sampling device are electrically connected with the controller, the alarm is used for giving an alarm for the fault condition of equipment, the audio sampling device is used for collecting sound signals in the use process of the washing machine, the controller identifies and judges the fault sound of the equipment according to a preset algorithm, and the specific steps of the preset algorithm are as follows:
step A1, collecting sound signals in the use process of the washing machine through audio sampling equipment to obtain original audio signals x (n);
step A2, analyzing the frequency spectrum of the audio, selecting a cut-off frequency value, performing low-pass filtering processing on an original audio signal x (N), then performing normalization processing on the processed audio signal, and limiting the amplitude of an audio sample between [ -1 and 1], so as to obtain a sound signal s (k), wherein k is 1,2.. N, and N is the number of sampling frequencies;
step a3, fourier transforming the sound signal by the following formula:
wherein S isnIs the sound signal after Fourier transform, j is the unit of imaginary number;
step a4, calculating the power spectral density of the sound signal in different frequency ranges as:
wherein, WnFor the power of the sound signal in the nth frequency range, PiIs the power spectral density at frequency i, frFor frequency resolution, fstartTo the starting resolution, fendTo end resolution;
step A5, the controller judges the difference power spectral density of the sample sound and the standard sound, and controls the alarm according to the judgment result:
wherein FRU represents a control result, A represents alarm, B represents alarm closing, and C represents the maximum preset difference value of the power spectral density difference between the sample sound and the standard sound;
step a6, the alarm executes the control result.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257516A (en) * | 1992-06-02 | 1993-11-02 | Raytheon Company | Washing machine |
| CN205557100U (en) * | 2016-03-11 | 2016-09-07 | 慈溪市飞杰电器厂 | Washing machine of more permanent portable of life |
| CN210215919U (en) * | 2019-06-11 | 2020-03-31 | 广州宁海船舶服务有限公司 | A washing machine with shock absorption function |
| CN212560817U (en) * | 2020-04-29 | 2021-02-19 | 合肥市久洋精密部件有限公司 | Noise reduction base for washing machine |
-
2021
- 2021-06-03 CN CN202110618736.5A patent/CN113373658B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257516A (en) * | 1992-06-02 | 1993-11-02 | Raytheon Company | Washing machine |
| CN205557100U (en) * | 2016-03-11 | 2016-09-07 | 慈溪市飞杰电器厂 | Washing machine of more permanent portable of life |
| CN210215919U (en) * | 2019-06-11 | 2020-03-31 | 广州宁海船舶服务有限公司 | A washing machine with shock absorption function |
| CN212560817U (en) * | 2020-04-29 | 2021-02-19 | 合肥市久洋精密部件有限公司 | Noise reduction base for washing machine |
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Denomination of invention: A noise reduction and fixing device for a washing machine Granted publication date: 20220913 Pledgee: Industrial and Commercial Bank of China Limited Sihong Branch Pledgor: Jiangsu Huasheng New Material Technology Co.,Ltd. Registration number: Y2025980057834 |