CN115538096A - Washing machine unbalance detection method - Google Patents

Washing machine unbalance detection method Download PDF

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Publication number
CN115538096A
CN115538096A CN202211368370.1A CN202211368370A CN115538096A CN 115538096 A CN115538096 A CN 115538096A CN 202211368370 A CN202211368370 A CN 202211368370A CN 115538096 A CN115538096 A CN 115538096A
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CN
China
Prior art keywords
washing machine
displacement
damper
detection method
amplitude
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
CN202211368370.1A
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Chinese (zh)
Inventor
李兵强
王东亨
赵逸云
邢化玲
周素莹
袁学兵
赵冬冬
张峰
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Northwestern Polytechnical University
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Northwestern Polytechnical University
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Publication date
Application filed by Northwestern Polytechnical University filed Critical Northwestern Polytechnical University
Priority to CN202211368370.1A priority Critical patent/CN115538096A/en
Publication of CN115538096A publication Critical patent/CN115538096A/en
Pending legal-status Critical Current

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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
    • 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
    • D06F34/20—Parameters relating to constructional components, e.g. door sensors
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/24—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a vertical axis
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/26—Imbalance; Noise level

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

The invention relates to the technical field of washing machines, in particular to an unbalance detection method of a washing machine, which comprises the technical scheme of a pulsator washing machine and a drum washing machine.

Description

Washing machine unbalance detection method
Technical Field
The invention relates to the technical field of washing machines, in particular to an unbalance detection method of a washing machine.
Background
The washing machine is a common household appliance, can conveniently and quickly wash articles for daily use such as clothes, bedding and the like, brings convenience to the life of people, and at present, mainly comprises a pulsator washing machine and a drum washing machine.
The washing machine requires laundry unbalance detection during operation. The impeller type washing machine drives the impeller to rotate by the motor, clothes continuously roll up and down along with water, and the inner drum rotates in the box body during dehydration so as to spin-dry the clothes in the inner drum. When the inner cylinder rotates at a high speed, a larger eccentric moment can be generated due to unbalance, so that the outer cylinder is driven to vibrate, and when the vibration of the outer cylinder exceeds the maximum vibration absorption of a vibration absorption system of the washing machine, the outer cylinder can collide against the box body at the moment. In the case of a drum type washing machine, when the vibration amplitude of the outer tub caused by the rotation of the inner tub is too large, the overall unbalance of the washing machine may jump, and noise may be generated, which may affect the user's experience, or even cause malfunction or damage.
As for the method for detecting the imbalance of the washing machine, there are methods for installing a pressure sensor or an acceleration sensor in the prior art, for example, patents with publication numbers CN102733142A, CN105274775A, and CN102733142A, etc., and there are methods for measuring distance or obtaining a torque fluctuation value by using laser, for example, patents with publication numbers CN108486827A, CN104963169A, CN105155206A, etc., but the above methods are all high in cost; there are also methods of indirectly detecting the bus current fluctuation of the driving motor, such as US5070565, etc., but the above methods have limited accuracy and cannot accurately detect or even predict the imbalance state.
The methods applied above have the problems of low measurement precision and large error, or the problems of complex system and high cost, and are difficult to meet the requirements of the washing machine on intellectualization and high performance.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for detecting the unbalance of a washing machine by using a displacement sensor.
It should be noted that the washing machine described in the present invention includes both a pulsator washing machine equipped with 4 displacement sensors and a drum washing machine equipped with 2 or more than 2 displacement sensors, and in the present invention, "a plurality of displacement sensors" refers to the number of displacement sensors installed in different washing machines.
The technical scheme adopted by the invention for solving the technical problem comprises the following steps:
step 1, specifically, the washing machine includes a pulsator washing machine and a drum washing machine. The unbalance detection device of the pulsator washing machine comprises a suspension system, wherein the suspension system is provided with 4 suspenders, one end of each suspender is fixed in a box body of the washing machine, the other end of each suspender is provided with a spring mechanism, an outer cylinder of the washing machine is connected to the spring mechanism and used for suspending the outer cylinder, and a displacement sensor is arranged below the spring mechanism and connected with a control system of the washing machine;
step 2, further, the unbalance detection device of the drum-type washing machine comprises a suspension and support system, wherein the suspension and support system consists of 2 suspenders and a plurality of support dampers with displacement sensors, and the number of the support dampers comprises but is not limited to 2, and can also be 3 or 4. The installation mode of the suspender is the same as that of the step 1, the lower end of the supporting shock absorber is fixed at the bottom of the box body of the washing machine, the upper end of the supporting shock absorber is connected with the outer cylinder of the washing machine through a spring mechanism, a displacement sensor is arranged below the spring mechanism, and the displacement sensor is connected with a control system of the washing machine;
step 3, by utilizing the device provided above, the invention also provides the following method for detecting the unbalance of the washing machine, wherein the unbalance is detected at intervals in the operation process of the washing machineT S The displacement of a plurality of displacement sensors is collected once, and the collected data is substituted into a weight formula: d = T 1 ×D S1 +T 2 ×D S2 +…+T n ×D Sn +D 1 Wherein, T 1 ～T n As weight coefficients for the imbalance detection phase, D S1 ～D Sn Respectively displacement of a plurality of displacement sensors, D is the weighted displacement of the plurality of displacement sensors, D 1 Parameters related to friction and initial state;
step 4, obtaining the weighted displacement of the displacement sensor, comparing a displacement-outer cylinder amplitude relation curve stored in the washing machine, and judging whether the displacement reaches an outer cylinder amplitude threshold value, if not, the washing machine continues to operate; if the amplitude exceeds the threshold value of the amplitude, the washing machine automatically adjusts until the amplitude is within the threshold value; if the adjustment is not successful, the washing machine sends out an alarm signal and stops running.
The invention has the beneficial effects that:
according to the invention, through the plurality of displacement sensors, the vibration offset of the outer barrel in each direction can be detected in real time, so that the condition of impact or washing machine jumping caused by serious load eccentricity is avoided, and the safety of the washing machine is further improved.
The displacement sensor and the suspender or the supporting shock absorber are integrally designed and assembled, no extra space requirement is required, and the reliability is high.
The unbalance detection device of the washing machine provided by the invention has the advantages of simple structure and sensitive response, and the provided unbalance detection method is accurately controlled.
Drawings
FIG. 1 is a flow chart of a method for detecting an unbalance in a washing machine according to the present invention;
fig. 2 is a structural view of a pulsator washing machine according to the present invention;
FIG. 3 is a structural view of a drum type washing machine according to the present invention;
FIG. 4 is a schematic view of a boom with a displacement sensor according to the present invention;
FIG. 5 is a graph showing the relationship between the displacement of the displacement sensor and the amplitude of vibration of the outer cylinder.
Illustration of the drawings:
1. a washing machine box body; 2. an outer cylinder; 3. an inner barrel; 4. hanging feet; 5. a screw rod; 6. a connector; 7. a damper; 8. a compression spring; 9. a displacement sensor; 10. a lifting ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example one
Referring to fig. 2, the present invention provides a technical solution: a washing machine unbalance detection method comprising: the technical scheme of the wheel type washing machine and the drum type washing machine is that 4 suspenders provided with position sensors are respectively arranged at four positions of the left front, the right back and the left back in the washing machine, are connected with a box body 1 through 4 suspension feet and are connected with an outer cylinder through 6 connectors. Fig. 4 is a schematic view of a suspender, wherein a damper 7 is arranged below a screw 5, an 8 compression spring for providing a shock absorption function is arranged below the damper 7, and a displacement sensor 9 is arranged at the lowest part.
The suspension rod comprises a spring type, a hydraulic damping type and an air damping type, and can move correspondingly under the corresponding stress condition.
The displacement sensor can be inductive, capacitive, electromagnetic, eddy current, or potentiometer, and is not limited to a specific implementation.
During the operation of the washing machine, the washing machine is programmed to operate for each fixed time period T S Data was collected once for 4 displacement sensors.
And (3) carrying out weighting calculation on the acquired data to obtain weighted displacement, obtaining real-time barrel vibration amplitude by contrasting a displacement outer barrel vibration amplitude relation curve, ensuring that the washing machine is in a normal operation state, if the amplitude is overlarge, automatically adjusting the washing machine until the vibration amplitude is within a threshold value, and if the adjustment cannot be successfully carried out, timely alarming and stopping the operation of the washing machine.
Example two
Referring to fig. 3,2 supporting dampers with position sensors and 2 suspension rods are respectively installed at four positions of the lower left, lower right, upper right and upper left inside the washing machine, and the two suspension rods above are connected with the box body 1 through 4 suspension legs and connected with the outer cylinder through 6 connectors. The two supporting shock absorbers below are connected with the box body 1 through a bearing seat and connected with the outer barrel through a connector 6.
It should be noted that the number of the supporting dampers having the position sensor installed therein in the drum type washing machine includes, but is not limited to, 2, and may be 3 or 4, and all fall within the scope of the present invention.
During the washing process, the washing machine is programmed to operate for a fixed time period T S And acquiring data once for a plurality of displacement sensors.
And (3) carrying out weighting calculation on the acquired data to obtain weighted displacement, obtaining real-time barrel vibration amplitude by contrasting a displacement outer barrel vibration amplitude relation curve, ensuring that the washing machine is in a normal operation state, if the amplitude is overlarge, automatically adjusting the washing machine until the vibration amplitude is within a threshold value, and if the adjustment cannot be successfully carried out, timely alarming and stopping the operation of the washing machine.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.

Claims (10)

1. The unbalance detection method of the washing machine comprises the technical scheme of a pulsator washing machine and is characterized in that four hanging rods provided with position sensors are respectively arranged at the front left position, the front right position, the rear right position and the rear left position in the washing machine, are connected with a box body through hanging feet (4) and are connected with an outer barrel (2) through a connector (6).
2. The unbalance detecting method for washing machine includes the technological scheme of drum washing machine, and features that the support damper with position sensor and two suspenders are installed separately in the lower part and the upper part of the washing machine, and the two suspenders in the upper part are connected via hanging feet (4) to the casing and connected via connector (6) to the outer tub (2). The supporting shock absorber at the lower part is connected with the box body through a bearing seat and is connected with the outer barrel (2) through a connector (6).
3. The unbalance detection method in a washing machine according to claim 2, wherein the number of the supporting dampers having the position sensor installed therein includes but is not limited to two, and may be three or four.
4. The unbalance detection method of a washing machine according to claim 2, wherein the hanger is not mounted with the position sensor in the drum type washing machine.
5. The method for detecting the imbalance of a washing machine according to claim 1, wherein the design scheme of the suspension rod is that a damper (7) is arranged below the screw rod (5), the connector (6) is positioned on the damper (7), a compression spring (8) providing a shock absorption function is arranged below the damper (7), a displacement sensor (9) is arranged below the damper, and a hanging ring (10) providing a connection function is arranged at the lowest part of the damper.
6. The unbalance detection method of a washing machine according to claim 2, wherein the design scheme of the supporting shock absorber is that a screw rod (5) is arranged below the connector (6), a damper (7) is arranged below the screw rod (5), a compression spring (8) providing a shock absorption function is arranged below the damper (7), a displacement sensor (9) is arranged below the compression spring, and a hanging ring (10) providing a connection function is arranged at the lowest part of the hanging ring.
7. A washing machine unbalance detection method according to claims 1-2, characterized in that said hanger/support shock absorbers comprise the spring type, the hydraulic damping and the air damping type.
8. Method for detecting the unbalance of a washing machine according to claim 1, characterized in that the displacement sensor (9) can be inductive, capacitive, electromagnetic, eddy current, potentiometer, without being limited to specific implementations.
9. The washing machine unbalance detection method according to claims 1-8, characterized in that the displacement amounts of the plurality of displacement sensors (9) are collected at intervals during the operation of the washing machine, and the collected data are substituted into the weight formula: d = T 1 ×D S1 +T 2 ×D S2 +…+T n ×D Sn +D 1 Wherein, T 1 ～T n As weight coefficients for the unbalance detection phase, D S1 ～D Sn Respectively displacement amounts of the plurality of displacement sensors (9), D is a displacement amount weighted by the plurality of displacement sensors (9), D 1 Are parameters related to friction and initial conditions.
10. The imbalance detection method for a washing machine according to claim 9, wherein the weighted displacement of the displacement sensor (9) is obtained, and whether a threshold value of the amplitude of the outer tub (2) is reached is judged by referring to a relation curve of the displacement and the amplitude of the outer tub (2) stored in the washing machine, and if the threshold value of the amplitude is not reached, the washing machine continues to operate; if the amplitude exceeds the threshold value of the amplitude, the washing machine automatically adjusts until the amplitude is within the threshold value; if the adjustment is not successful, the washing machine sends out an alarm signal and stops running.
CN202211368370.1A 2022-11-03 2022-11-03 Washing machine unbalance detection method Pending CN115538096A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211368370.1A CN115538096A (en) 2022-11-03 2022-11-03 Washing machine unbalance detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211368370.1A CN115538096A (en) 2022-11-03 2022-11-03 Washing machine unbalance detection method

Publications (1)

Publication Number Publication Date
CN115538096A true CN115538096A (en) 2022-12-30

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ID=84721110

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211368370.1A Pending CN115538096A (en) 2022-11-03 2022-11-03 Washing machine unbalance detection method

Country Status (1)

Country Link
CN (1) CN115538096A (en)

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