CN107419479B - Washing machine and vibration unbalance detection method thereof - Google Patents
Washing machine and vibration unbalance detection method thereof Download PDFInfo
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- CN107419479B CN107419479B CN201710818010.XA CN201710818010A CN107419479B CN 107419479 B CN107419479 B CN 107419479B CN 201710818010 A CN201710818010 A CN 201710818010A CN 107419479 B CN107419479 B CN 107419479B
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- D06F37/203—
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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
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
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Abstract
The invention relates to the technical field of washing machines, and discloses a washing machine and a vibration unbalance detection method thereof, wherein the washing machine comprises a box body and a barrel assembly, one of the bottom of the box body and the bottom of the barrel assembly is provided with a light-emitting element, the other one is provided with a reflecting element corresponding to the light-emitting element, the light-emitting element is used for emitting light with a set angle, and the reflecting element is used for reflecting the light back to the light-emitting element; the light-emitting element is also connected with a controller, and the controller is used for judging the vibration unbalance of the washing machine and controlling the washing machine to stop running when the intensity of the reflected light received by the light-emitting element exceeds a preset range. According to the invention, the spatial position change between the light-emitting element and the reflecting element can be judged by detecting the intensity of the reflected light received by the light-emitting element, so that the vibration unbalance condition of the washing machine in each direction in a three-dimensional space can be accurately and sensitively detected, the detection blind spots are effectively reduced, and the damage of the washing machine caused by over-range vibration is avoided.
Description
Technical Field
The invention relates to the technical field of washing machines, in particular to a washing machine and a vibration unbalance detection method thereof.
Background
The tub assembly is a core part of the washing machine and mainly functions to be mechanically rotated to tumble the items to be washed contained therein and the fluid during the washing process. When the washing machine works, the barrel assembly is required to run stably, if the load distribution in the barrel is extremely uneven, the barrel can generate destructive vibration beyond the range, the damage is generated on the parts of the washing machine, the service life of the whole machine is further influenced, and the destructive vibration beyond the range is vibration unbalance.
As shown in fig. 1, a mechanical switch 6 ' is generally used in the prior art for detecting vibration imbalance of a washing machine, and when the tub assembly 2 ' vibrates in an out-of-range manner, the mechanical switch 6 ' disposed between an outer wall of the tub and an inner wall of the cabinet 1 ' is touched, and the mechanical switch 6 ' sends a signal to the controller 5 ', and the controller 5 ' controls the washing machine to turn off a power supply, so that the washing machine stops working. The disadvantage of this detection method is that, firstly, the installation space requirement of the mechanical switch 6' is large, which has an influence on the receiving space of the washing machine; secondly, in the long-time use process, frequent collision between the mechanical switch 6 'and the barrel assembly 2' can occur, so that the distance between the mechanical switch 6 'and the barrel is changed, and the sensitivity of the mechanical switch 6' is reduced; thirdly, if the maximum amplitude is not at the set point of the mechanical switch 6 'when the tub is vibrated out of range, the mechanical switch 6' will lose the function of detecting the unbalance of the washing machine; for the same reason, the mechanical switch 6' is only suitable for detecting the unbalance of the tub in a one-dimensional rotation plane, and cannot detect the vibration of the tub in a three-dimensional space.
The prior art also discloses a method for detecting the unbalance of a washing machine, which comprises the following steps: the light emitted by the luminous element on the inner wall of the washing machine box body with a set angle is irradiated on the reflecting element at a preset position of the outer barrel; acquiring reflected light reflected by the reflecting element; converting the optical signal of the reflected light into an electrical signal; and judging the balance state of the washing machine according to the electric signal. The method is characterized in that the light-emitting element is arranged on the inner wall of the box body, the function of the method is similar to that of the mechanical switch, firstly, the method can only detect the vibration condition when the barrel assembly operates to a certain point, the detection range is small, and the accuracy is poor; secondly, the detection device is also only suitable for detecting the unbalance of the barrel in a one-dimensional rotating plane, and the detection is difficult for the vibration unbalance of the barrel in a three-dimensional space, for example, when the maximum amplitude of the up-and-down vibration of the barrel is not between the light-emitting element and the reflecting element, the detection device loses the detection function.
Accordingly, there is a need for an improvement of the existing technology for detecting the balance state of the washing machine to overcome the above-mentioned disadvantages.
Disclosure of Invention
Based on the above, the present invention is directed to a washing machine and a vibration unbalance detection method thereof, so as to solve the problems of the prior art that when unbalance detection is performed on the washing machine, sensitivity is low, accuracy is poor, and vibration unbalance of the washing machine in a three-dimensional direction cannot be detected.
In order to achieve the purpose, the invention adopts the following technical scheme:
a washing machine comprises a box body and a barrel assembly, wherein one of the bottom of the box body and the bottom of the barrel assembly is provided with a light-emitting element, the other one is provided with a reflecting element corresponding to the light-emitting element, the light-emitting element is used for emitting light with a set angle, and the reflecting element is used for reflecting the light back to the light-emitting element; the controller is used for judging the vibration unbalance of the washing machine when the intensity of the reflected light received by the light-emitting element exceeds a preset range, and controlling the washing machine to stop running.
Preferably, the light emitting element is further connected with a photoelectric conversion device, and the photoelectric conversion device is used for converting the received reflected light signal into an electric signal and sending the electric signal to the controller.
Preferably, the washing machine further comprises an alarm device connected with the controller, and the alarm device is used for giving an alarm under the control of the controller after the controller judges that the washing machine is unbalanced in vibration.
Preferably, the washing machine further comprises a water inlet detection device arranged in the barrel assembly, wherein the water inlet detection device is used for detecting whether the washing machine re-enters water or not after the washing machine stops operating under the control of the controller, and feeding back a detected water inlet signal to the controller.
Preferably, the light emitting element is arranged at the center of the bottom of the box body, and the reflecting element is arranged at the center of the bottom of the barrel assembly; or the light-emitting element is arranged at the central position of the bottom of the barrel assembly, and the reflecting element is arranged at the central position of the bottom of the box body.
Preferably, the light emitting element is an LED lamp, and the reflecting element is reflective paper.
Preferably, the photoelectric conversion device is a photosensor, specifically, a photodiode.
A vibration unbalance detection method of a washing machine according to any one of the above aspects, comprising the steps of:
controlling a light-emitting element positioned at the bottom of the box body or the bottom of the barrel component to emit light with a set angle;
obtaining reflected light reflected by a reflecting element corresponding to the light-emitting element and positioned at the bottom of the barrel assembly or the bottom of the box body;
judging whether the intensity of the reflected light is within a preset range, if so, judging that the current washing machine is in a balanced state, and controlling the washing machine to operate according to a set program; if not, judging that the washing machine is in a vibration unbalance state at present, and controlling the washing machine to stop running.
Preferably, the judging that the washing machine is in a vibration unbalance state at present and controlling the washing machine to stop operating further includes:
starting the alarm device to alarm;
and starting a water inlet device to re-inlet water into the washing machine, and controlling the washing machine to rotate at a preset low speed to enable the washing machine to return to a balanced state.
Preferably, the preset range of the intensity of the reflected light is set according to the type of the washing machine and/or the washing requirements.
The invention has the beneficial effects that:
one of the light-emitting element and the reflecting element is arranged at the bottom of the box body, and the other one of the light-emitting element and the reflecting element is arranged at the bottom of the barrel assembly; when the washing machine vibrates strongly and the offset of the barrel assembly is large, the spatial distance between the light-emitting element and the reflecting element is changed obviously, so that the intensity of reflected light received by the light-emitting element is changed greatly and exceeds a preset range, and the current washing machine can be judged to be in an unbalanced state.
The invention can judge the space position change between the light emitting element and the reflecting element by detecting the intensity of the reflected light received by the light emitting element, thereby judging whether the washing machine is in an unbalanced state. Because the vibration of the barrel component in any direction can cause the position change of the corresponding point at the bottom of the barrel, so that the distance between the light-emitting element and the reflecting element is changed, the invention not only can detect the deviation of the barrel component in any position in a rotating plane, but also can detect the deviation of the barrel component along the axial direction, namely, the vibration unbalance condition of the washing machine in all directions in a three-dimensional space can be accurately and sensitively judged, and the detection blind spot is effectively reduced.
In addition, the light-emitting element and the reflecting element have small volumes, the installation space is far smaller than that of a traditional mechanical switch, and the accommodating space in the washing machine can be effectively saved; the light-emitting element of the invention has stable performance and higher sensitivity, greatly reduces the damage of the over-range vibration of the barrel component to the washing machine, and prolongs the service life of the washing machine.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic view of a prior art washing machine with a mechanical switch mounted thereon;
fig. 2 is a schematic structural view of a washing machine according to an embodiment of the present invention;
fig. 3 is a flowchart of a vibration unbalance detection method of a washing machine according to an embodiment of the present invention;
fig. 4 is a schematic diagram of detecting vibration of a washing machine according to an embodiment of the present invention.
In the figure:
1' -a box body; 2' -a barrel assembly; 5' -a controller; 6' -a mechanical switch;
1-a box body; 2-a barrel assembly; 21-outer barrel; 22-inner barrel; 23-a drive system; 3-a light emitting element; 4-a reflective element; and 5, a controller.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 2, the present embodiment provides a preferred washing machine including a cabinet 1, a tub assembly 2, a light emitting element 3, a reflecting element 4, and a controller 5, wherein the tub assembly 2 is disposed in the cabinet 1, and the tub assembly 2 includes an outer tub 21, an inner tub 22, and a driving system 23. One of the light-emitting element 3 and the reflecting element 4 is arranged at the bottom of the box body 1, the other one is arranged at the bottom of the barrel component 2, the light-emitting element 3 and the reflecting element 4 are opposite up and down, and the light-emitting element 3 can be an LED lamp and is used for emitting light with a set angle to irradiate on the reflecting element 4; the reflective element 4 may be a reflective paper for reflecting light back to the light emitting element 3. Of course, the light emitting element 3 may be an incandescent lamp, a neon lamp, a laser lamp, etc., and the reflecting element 4 may be a spherical mirror, a plane mirror, a reflecting prism, etc. In the embodiment, the reflecting element 4 is made of reflecting paper, so that the structure of the washing machine can be simplified, and the cost is saved. Under the normal working condition of the washing machine, the relative positions of the light-emitting element 3 and the reflecting element 4 cannot generate large offset, so that the intensity of reflected light received by the light-emitting element 3 is in a preset range, the washing machine is in a balanced state in a three-dimensional space at the moment, and the washing machine continues to operate; when the washing machine vibrates strongly and the offset of the tub assembly 2 is large, the spatial distance between the light emitting element 3 and the reflecting element 4 changes significantly, so that the intensity of the reflected light received by the light emitting element 3 exceeds a preset range, and the washing machine is in an unbalanced state at the moment and is controlled to stop running by the controller 5. Through the arrangement, the vibration unbalance condition of the washing machine in all directions in the three-dimensional space can be detected, detection blind spots are effectively reduced, the detection sensitivity is improved, and the damage of the washing machine caused by over-range vibration is avoided; meanwhile, the light-emitting element 3 and the reflecting element 4 are small in size, the installation space is far smaller than that of a traditional mechanical switch, and the accommodating space in the washing machine can be effectively saved.
Further, a photoelectric conversion device for converting the received reflected light signal into an electrical signal is connected to the light emitting element 3, and the converted electrical signal is stronger as the intensity of the reflected light is higher. The photoelectric conversion device is a photoelectric sensor, and specifically can be a photodiode; the electrical signal may be a current or a voltage. After the photoelectric conversion device converts the optical signal into the electrical signal, the photoelectric conversion device also transmits the electrical signal to the controller 5, and the controller 5 determines whether the washing machine is unbalanced. For example, when the controller 5 detects that the current value exceeds the set current range or the voltage value exceeds the set voltage range, it can determine that the washing machine is out of balance.
In this embodiment, an alarm device is further provided, and the alarm device is connected to the controller 5 and is configured to alarm when the controller 5 determines that the vibration of the washing machine is unbalanced. The specific alarm mode is buzzer sound or LED lamp flickering, etc., so as to remind the user that the current washing machine is abnormal in work, and the user can know the condition in time and take corresponding measures. Preferably, a water inlet detection device is further disposed in the tub assembly 2, and is configured to detect whether water is re-introduced into the washing machine after the controller 5 controls the washing machine to stop operating, and feed back a detected water inlet signal to the controller 5. If it is detected that the washing machine is refilled with water, the controller 5 controls the motor to operate at a preset low speed, such as 400 rpm, 200 rpm, or 100 rpm, for a period of time, so that the washing machine returns to a balanced state, and continues the setting procedure before unbalance occurs.
Further, as shown in fig. 2, the light emitting element 3 is disposed at the center of the bottom of the barrel assembly 2, the reflective element 4 is disposed at the center of the bottom of the housing 1, and the driving mechanism 23 is further disposed at the center of the bottom of the barrel assembly 2, so that the light emitting element 3 is preferentially disposed at the bottom of the driving mechanism 23 in the present embodiment. The drive mechanism 23 is embodied as a rotary electric machine. Of course, the present invention can also achieve the effect of detecting the vibration unbalance of the washing machine in three dimensions by disposing the light emitting element 3 at the center of the bottom of the cabinet 1 and the reflecting element 4 at the bottom of the driving mechanism 23. By the arrangement, the light-emitting element 3 is more sensitive to the displacement change of the barrel component 2, and the detection result is more accurate and reliable.
As shown in fig. 4, the working principle of the present invention is as follows: let an initial emission point of the light emitting element 3 be a, a reflection point of the reflecting element 4 be B, and an initial distance between the light emitting element 3 and the reflecting element 4 be L0. After the washing machine starts to operate, the inner tub 22 rotates to drive the whole tub assembly 2 to vibrate, and at this time, the light emitting element 3 vibrates and deflects relative to the reflective element 4, and the final emitting point is a ', and the final distance between a' and B is L1. The final distance L1 is changed from the initial distance L0, and the distance change values in the three directions of x, y and z are respectively set as Δ x, Δ y and Δ z, and the distance change value Δ L is L1-L0. The generation of Δ L causes a change in light intensity, the initial intensity of the reflected light is I1, the intensity of the reflected light is changed to I2 due to the generation of Δ L, the light intensity change value Δ I is I2-I1, and if Δ I is less than a preset initial value, it indicates that the vibration is not out of the allowable range, and the washing machine can still be in an operating state. If the external barrel of the washing machine vibrates greatly in three-dimensional directions, so that the delta I is larger than a preset initial value, which indicates that the vibration displacement of the barrel assembly 2 exceeds an allowable range, the washing machine is controlled to stop the washing or dewatering process.
The invention can judge the space position change between the light emitting element 3 and the reflecting element 4 by detecting the intensity of the reflected light received by the light emitting element 3, thereby judging whether the washing machine is in an unbalanced state. Because the vibration of the barrel component 2 in any direction can cause the position change of the corresponding point at the bottom of the barrel, so that the distance between the luminous element 3 and the reflecting element 4 is changed, the invention not only can detect the deviation of the barrel component 2 at any position in a rotating plane, but also can detect the deviation of the barrel component 2 along the axial direction, namely, can accurately and sensitively judge the vibration unbalance condition of the washing machine in all directions in a three-dimensional space, and effectively reduce detection blind spots.
As shown in fig. 3, the present embodiment also proposes a vibration unbalance detection method for the above washing machine, the method comprising the steps of:
the method comprises the following steps: when the washing machine is started to operate, the light emitting element 3 positioned at the bottom of the barrel assembly 2 emits light with a set angle to the reflecting element 4 positioned at the bottom of the box body 1;
step two: the light-emitting element 3 acquires the reflected light reflected by the reflecting element 4, and judges whether the intensity of the reflected light is within a preset range, if so, the current washing machine is judged to be in a balanced state, and the step 3 is carried out, if not, the current washing machine is judged to be in a vibration unbalance state, and the step 4 is carried out;
step three: the washing machine normally runs a set program until the washing process is finished;
step four: the controller 5 controls the washing machine to stop running and controls the alarm device to start to give an alarm;
step five: controlling the water inlet device to feed water into the washing machine again, and controlling the washing machine to rotate at a preset low speed so as to enable the washing machine to return to a balanced state;
step six: the washing machine continues to execute the setting program before unbalance and returns to step 2 to continue unbalance detection.
Furthermore, the preset range of the intensity of the reflected light can be set according to the type of the washing machine and/or the washing requirements, for example, for a more precise or collision-intolerant washing machine, the value of the preset range can be adjusted to be small appropriately to reduce the large vibration of the washing machine, and for an economical and collision-tolerant washing machine, the value of the preset range can be increased appropriately to improve the working efficiency of the washing machine.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A washing machine comprises a box body (1) and a barrel component (2), wherein a driving mechanism (23) is arranged at the center of the bottom of the barrel component (2), and is characterized in that one of the center of the bottom of the box body (1) and the bottom of the driving mechanism (23) is provided with a light-emitting element (3), the other one is provided with a reflecting element (4) corresponding to the light-emitting element (3), the light-emitting element (3) is used for emitting light with a set angle, and the reflecting element (4) is used for reflecting the light back to the light-emitting element (3); the light-emitting element (3) is a laser lamp, and the reflecting element (4) is a reflecting prism; the light-emitting element (3) is further connected with a controller (5), and the controller (5) is used for judging the vibration unbalance of the washing machine and controlling the washing machine to stop running when the intensity of reflected light received by the light-emitting element (3) exceeds a preset range.
2. Washing machine according to claim 1, characterized in that the light emitting element (3) is further connected with a photoelectric conversion device for converting the received reflected light signal into an electrical signal and sending it to the controller (5).
3. The washing machine according to claim 2, further comprising an alarm device connected to the controller (5), wherein the alarm device is controlled by the controller (5) to give an alarm when the controller (5) determines that the washing machine is out of balance due to vibration.
4. The washing machine as claimed in claim 3, further comprising a water inlet detection device provided in the tub assembly (2), the water inlet detection device being configured to detect whether the washing machine is re-supplied with water after the controller (5) controls the washing machine to stop operation, and to feed back a detected water inlet signal to the controller (5).
5. A washing machine as claimed in claim 4 wherein the photo-conversion device is a photodiode.
6. A vibration unbalance detection method of a washing machine according to claim 4 or 5, characterized by comprising the steps of:
controlling a light-emitting element (3) positioned at the bottom of the box body (1) or the bottom of the barrel component (2) to emit light with a set angle;
obtaining reflected light reflected back by a reflecting element (4) which is positioned at the bottom of the barrel component (2) or the bottom of the box body (1) and corresponds to the light-emitting element (3);
judging whether the intensity of the reflected light is within a preset range, if so, judging that the current washing machine is in a balanced state, and controlling the washing machine to operate according to a set program; if not, judging that the washing machine is in a vibration unbalance state at present, and controlling the washing machine to stop running.
7. The method of claim 6, wherein the determining that the washing machine is in a vibration unbalance state and controlling the washing machine to stop operating further comprises:
starting the alarm device to alarm;
and starting a water inlet device to re-inlet water into the washing machine, and controlling the washing machine to rotate at a preset low speed to enable the washing machine to return to a balanced state.
8. The method of claim 6, wherein the predetermined range of the intensity of the reflected light is set according to a type of the washing machine and/or a washing requirement.
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| CN201710818010.XA CN107419479B (en) | 2017-09-12 | 2017-09-12 | Washing machine and vibration unbalance detection method thereof |
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| CN108589177A (en) * | 2018-03-20 | 2018-09-28 | 江苏新安电器有限公司 | A kind of washing machine imbalance detection system based on angle measurement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105088608A (en) * | 2014-05-16 | 2015-11-25 | 无锡小天鹅股份有限公司 | Pulsator washing machine |
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| DE3938822A1 (en) * | 1989-11-23 | 1991-05-29 | Miele & Cie | Drum washing machine with washing soln. container - in which device for registering forces acting on container is optical scanner |
| US5713221A (en) * | 1996-08-23 | 1998-02-03 | White Consolidated Industries, Inc. | Optical out-of-balance sensor for a washer |
| CN203159943U (en) * | 2013-04-09 | 2013-08-28 | 海信容声(广东)冰箱有限公司 | Pulsator washing machine |
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