WO2018006788A1

WO2018006788A1 - Device and method for detecting operating balance of washing machine

Info

Publication number: WO2018006788A1
Application number: PCT/CN2017/091606
Authority: WO
Inventors: 许升; 王小伟; 赵鹏飞; 张惠玉; 高秋英
Original assignee: 青岛海尔洗衣机有限公司
Priority date: 2016-07-05
Filing date: 2017-07-04
Publication date: 2018-01-11
Also published as: CN107574624B; CN107574624A

Abstract

Disclosed are a device for detecting the operating balance of a washing machine and a detection method using the device. The device is symmetrically equipped with multiple pairs of magnets (11, 21, 31, 41) on the upper part of an outer drum (5) along the circumference, multiple pairs of reed switches (1, 2, 3, 4) are correspondingly disposed on the upper part of a box body (8) or at the lower part of a control disc seat, the reed switches (1, 2, 3, 4) are mounted on the inner wall of the box body (8) or on the part of the inner wall of the control disc seat that is the closest to the outer drum (5), and the reed switches (1, 2, 3, 4) and the magnets (11, 21, 31, 41) constitute a reed sensor for detecting the operating balance of the washing machine. A magnet (9) is mounted on an inner drum (7), and a reed switch is correspondingly disposed on the box body (8) or the control disc seat. The reed switch and the magnet (9) constitute a reed sensor for detecting the rotational speed of the inner drum (7). The operating balance and the rotational speed of the washing machine are detected by the detection method using this device. The device and method for detecting the operating balance of the washing machine have a simple structure, high sensitivity and a lower power consumption.

Description

Washing machine running balance detecting device and method

Technical field

The invention relates to the field of washing machines, in particular to a washing machine running balance detecting device and method.

Background technique

At present, the balance detection of the washing machine is realized by using a mechanical switch. The full-automatic washing machine of the pulsator is realized by a safety micro switch (referred to as a safety switch, belonging to a mechanical switch) and a connecting arm. When the vibration amplitude of the washing machine is large, it will touch. The safety switch with the connecting arm to the protection position; the micro-control unit MCU of the washing machine control board determines the switch state through the safety switch circuit, and the collision time meets a certain set time (reaching the threshold value) to judge the imbalance and perform the failure. The alarm enters the balance correction program; at present, most of the automatic washing machines are such switching methods for determining and controlling, and the vibration amplitude determination and pre-alarm are controlled by adjusting the installation position or structure of the safety switch and the brake arm; the structure is complicated. The sensitivity is not high. For the washing machine washing and dehydration speed control, the Hall sensor is used to detect and output the feedback on the washing machine using the variable frequency motor and is controlled and adjusted by the washing machine control panel. However, the Hall sensor consumes a large amount of power, and the fixed frequency model There is no motor speed feedback and control determination, and there is no corresponding detection and alarm prompt.

The present invention has been made in view of the above.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a washing machine operation balance detecting device and method, which can detect the operation balance and the rotating speed of the washing machine, and has a simple structure, high sensitivity and low power consumption.

In order to solve the above technical problems, the basic idea of adopting the technical solution of the present invention is:

The washing machine running balance detecting device has a plurality of pairs of magnets circumferentially symmetrically mounted on the upper part of the outer tub, and a plurality of pairs of reed switches are arranged correspondingly in the upper part of the box body or the lower part of the control disc seat, and the reed switch tube is installed on the inner wall of the box or the control disc seat a portion of the inner wall closest to the outer tub, the reed switch and the magnet constitute a reed sensor for detecting the balance of the operation of the washing machine; a magnet is mounted on the inner tub, and a reed switch is correspondingly disposed on the box or the control disc seat, the dry The reed pipe and the magnet constitute a reed sensor that detects the rotation speed of the inner tub.

Further, four magnets are evenly mounted on the outer circumference of the outer tub of the washing machine, and four reed switches are arranged at the upper part of the upper part of the box or the lower part of the control disc seat, and the reed switch is installed on the inner wall of the box or the inner wall of the control disc seat The reed switch and the magnet form a reed sensor that detects the balance of the operation of the washing machine.

Further, four magnets are evenly mounted circumferentially on the upper portion of the outer tub, and a reed switch is disposed at an intermediate portion of each of the four sides of the lower portion of the casing or the lower portion of the control tray corresponding to the height of the magnet.

Further, a magnet is mounted on the upper part of the inner tub or the balance ring on the upper part of the inner tub, and a reed switch corresponding to the middle cut point of the inner bucket on either side of the box or the control disc seat, the reed switch and the magnet A reed sensor that detects the rotation speed of the inner tub.

Further, a magnet is mounted on the bottom end of the inner tub, and the polar end of the magnet is directed to a corresponding reed switch disposed on the box or the outer tub. The reed switch and the magnet constitute a reed sensor for detecting the rotation speed of the inner tub.

The washing machine running balance detecting method, using the device according to any one of the above, the imbalance of the outer tub is biased toward the box body, and the magnet on the upper part of the outer tub is close to the reed switch on the box body, so that the reed sensor in the reed sensor detecting the balance of the washing machine operation is used. The on-off state of the tube changes, and the micro-control unit MCU of the washing machine control board detects the balance state of the washing machine according to the output level change of the reed switch; the magnet on the inner barrel is rotated with the inner barrel to interact with the reed switch corresponding to the box. The on-off state of the reed switch in the reed sensor detecting the rotation speed of the inner tub is changed, and the number of conversions of the high and low levels of the reed switch output is counted by the counter, and compared with the set value to determine whether the inner drum rotation speed is normal.

Further, when detecting the inner tub rotation speed, the inner tub rotation speed in the washing state of the washing machine and the inner tub rotation speed in the dehydration state are respectively detected.

Further, when the inner tub does not rotate, the output levels of the respective reed switches in the reed sensors that detect the balance of the washing machine operation are consistent.

Further, the minimum rotation speed value of the inner tub in the washing state and the dehydration state is respectively set and stored in the washing machine control panel micro control unit MCU.

After adopting the above technical solution, the present invention has the following advantageous effects compared with the prior art.

In the washing machine running balance detecting device and method of the present invention, a plurality of pairs of magnets are circumferentially symmetrically mounted on the upper portion of the outer tub, and a plurality of pairs of reed switches are correspondingly arranged on the box body or the control disc seat, and the reed switches are installed on the inner wall of the tank or Controlling the inner wall of the disc holder closest to the outer tub, the reed switch and the magnet constitute a reed sensor for detecting the balance of the operation of the washing machine; the magnet on the upper part of the outer tub is close to the box or the reed switch on the disc holder is turned on and off. The change occurs and the output level thereof, the washing machine control panel micro control unit MCU detects the operating balance of the washing machine according to the change in the output level of the reed switch. Since the action characteristics of the reed switch are relatively sensitive, the magnet and the reed switch are arranged in pairs, so that when the outer drum of the washing machine is out of balance to the box, the magnet on the outer barrel is more sensitive to the on-off of the reed switch, thereby making the detection more Sensitive and accurate. A magnet is mounted on the inner tub, and a reed switch is correspondingly disposed on the outer casing or the outer tub. The reed switch and the magnet constitute a reed sensor for detecting the rotation speed of the inner tub. The outer tub assembly includes an inner tub When the inner tub is out of balance, the inner tub and the outer tub are biased toward the cabinet together. The invention utilizes the reed sensor to directly detect the balance state of the outer tub when the washing machine is working, and can avoid the three shortcomings of the existing balance detecting technology: Before the outer tub assembly hits the cabinet, it can be determined in advance, and the vibration of the outer and rear left and right directions of the outer tub assembly can be detected, and the vibration of the outer tub assembly can be detected and the frequency is high, and the determination can be made. Similarly, the reed switch sensor is used to detect the number of changes in the output level of the reed switch by the counter and compare with the set value to detect whether the rotation speed of the inner barrel in the washing and dehydrating state is normal, and the fault is timely and feedback.

The specific embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the installation of a reed sensor for detecting the balance of operation of a washing machine on a washing machine in the first embodiment of the present invention.

2 is a detection circuit of a reed sensor for detecting the balance of operation of a washing machine in the first embodiment of the present invention.

3 is a detection circuit of a reed sensor for detecting the rotation speed of the inner tub in the first embodiment of the present invention.

1. The first reed switch 11, the first magnet 2, the second reed switch 21, the second magnet 3, the third reed switch 31, the third magnet 4, the fourth reed switch 41, and the fourth magnet 5, Outer barrel 6, inner barrel 7, balance ring 8, box 9, fifth magnet.

detailed description

Embodiment 1

The washing machine running balance detecting device has a plurality of pairs of magnets circumferentially symmetrically mounted on the upper part of the outer tub, and a plurality of pairs of reed switches are arranged correspondingly in the upper part of the box body or the lower part of the control disc seat, and the reed switch tube is installed on the inner wall of the box or the control disc seat The inner wall is closest to the outer tub, and the reed switch and the magnet constitute a reed sensor for detecting the balance of the operation of the washing machine.

A magnet is mounted on the inner tub, and a reed switch is correspondingly disposed on the cabinet or the control disc base. The reed switch and the magnet constitute a reed sensor for detecting the rotation speed of the inner tub.

In the present embodiment, as shown in FIG. 1, four magnets, that is, a first magnet 11, a second magnet 21, a third magnet 31, and a fourth magnet 41 are uniformly mounted on the upper portion of the outer tub 5, in the casing 8. The upper corresponding height is provided with four reed switches, namely a first reed switch 1, a second reed switch 2, a third reed switch 3, and a fourth reed switch 4. The reed pipe is installed at the inner wall of the casing 8 closest to the outer tub 5, that is, at each of the four sides of the upper portion of the casing corresponding to the intermediate cutting point of the outer tub and a reed switch is disposed corresponding to the height of the magnet. The reed switch and the magnet constitute a reed sensor that detects the balance of operation of the washing machine. As shown in the circuit shown in Figure 2, the washing machine control panel micro control unit MCU detects the balance of the washing machine according to the change in the output level of the reed switch.

In other embodiments, a plurality of pairs of reed switches are correspondingly disposed in the lower portion of the control panel of the washing machine, and the reed switch is installed in the laundry. The inner wall of the machine control disc is located closest to the outer tub, and the reed switch and the magnet constitute a reed sensor for detecting the balance of the operation of the washing machine.

The four reed switches form four outputs, and the washing machine control board micro control unit MCU detects the output level, corresponding to the reed switch contact closure, the detection state is turned on to a high level, recorded as 1, and the reed switch is not closed. The loop-off state is low and is recorded as 0. When the washing machine is in equilibrium, all four reed switches are closed or all are in the off state, and the outer barrel has no vibration displacement, and the corresponding four output I/O outputs are in the state of 1111 or 0000. When the I/O output is detected as other values, it is in an unbalanced state, and the values of the unbalanced state are, for example, 1110, 1011, 1001, and the like. The inner barrel is biased according to the change of the detected output level, and is corrected by the corresponding program of the washing machine.

As shown in FIG. 1, in the present embodiment, a fifth magnet 9 is mounted on the inner tub 6 or at any point on the balance ring, (the same four rings representing the fifth magnet are drawn in the figure for the purpose of explanation. Selecting any one of the positions to set the fifth magnet) correspondingly providing a reed switch at the middle of the four sides of the box or the control tray corresponding to the inner barrel, the reed switch and the magnet constituting the detection of the inner barrel rotation speed Reed sensor. As shown in the circuit shown in Figure 3, the counter in the MCU of the washing machine control panel micro-control unit detects the number of high and low level changes of the output of the reed switch and compares it with the set value to detect whether the speed of the washing and dehydrating state is normal. .

In other embodiments, a magnet is mounted on the bottom end of the inner tub 6, and the polar end of the magnet is directed to a corresponding reed switch disposed on the casing 8. The reed switch and the magnet constitute a reed sensor for detecting the rotational speed of the inner tub. The magnet here is mounted at the bottom end of the inner tub 6 in order to minimize the effect of the magnet on the reed switch in the reed sensor that detects the balance of the operation of the washing machine. As shown in the circuit shown in Figure 3, the counter in the MCU of the washing machine control panel micro-control unit detects the number of high and low level changes of the output of the reed switch and compares it with the set value to detect whether the speed of the washing and dehydrating state is normal. .

The magnet of the reed sensor constituting the rotation speed of the inner tub is a horseshoe magnet installed at the bottom end of the inner tub, and the polar end of the horseshoe magnet is directed downward to a corresponding reed switch disposed on the box body, and the magnet is close to and away from the reed switch. When the reed switch is turned on and off, the level output change of the reed switch detecting circuit is affected, and the number of changes is counted to obtain the rotational speed value.

The outer tub assembly includes an inner tub 6 and an outer tub 5. When the inner tub 6 is unbalanced, the inner tub 6 and the outer tub 5 are biased toward the cabinet 8. The reed sensor can directly detect the balance between the inner tub 6 and the outer tub 5 when the washing machine is working. The state can circumvent the three shortcomings of the existing balance detection technology: it can be determined in advance before the outer tub assembly hits the box body 8, and can detect the vibration of the outer and rear left and right directions of the outer tub assembly, and can detect the vibration of the outer tub assembly but the frequency High situation and judgment. The reed sensor that detects the rotation speed of the inner tub is used to detect the number of high and low level changes of the output reed switch by the counter and compare with the set value to detect whether the rotation speed of the washing and dehydrating state is normal, and timely feedback in the event of a failure.

The washing machine running balance detecting device of the invention has the function of checking the working balance of the washing machine by setting the magnets and the reed switches in pairs The reed sensor makes the outer barrel 5 biased toward the box 8, and the magnet on the outer barrel 5 is more sensitive to the on-off of the reed switch, thereby making the detection more accurate. A magnet is mounted on the balance ring on the inner barrel or on the balance ring, and a reed switch is correspondingly arranged on the box body 8, forming a reed sensor for detecting the rotation speed of the inner barrel, thereby realizing the detection of the rotation speed of the washing machine. The device of the invention has simple structure, high sensitivity and low power consumption.

Embodiment 2

The washing machine operation balance detecting method of the invention uses the device according to the first embodiment to bias the outer barrel to the box body, and the magnet on the upper part of the outer barrel is close to the reed switch on the box body to change the on-off state, and the washing machine control panel micro-control The unit MCU detects the balance of the operation of the washing machine according to the change in the output level of the reed switch. The deviation of the outer tub is known according to the change of the detected output level, and is corrected by the corresponding program of the washing machine. In order to accurately determine whether the outer tub is out of balance, when the inner tub does not rotate, the output levels of the respective reed switches in the reed sensors that detect the balance of the washing machine operation are consistent.

The on-off state is changed by the magnet on the upper or the balance ring or the bottom of the inner barrel, and the reed switch corresponding to the box or the outer barrel is changed, and the on-off state is changed by using the counter to count the output of the reed switch. The number of conversions is compared with the setting to determine whether the inner barrel rotation speed is normal.

When detecting the inner drum rotation speed, the inner drum rotation speed in the washing state of the washing machine and the inner drum rotation speed in the dehydration state are respectively detected, and the minimum rotation speed value of the inner tub in the washing state and the dehydration state of the washing machine is respectively set and stored in the washing machine control panel micro control unit MCU.

The embodiments of the present invention may be further combined or substituted, and the embodiments are merely described for the preferred embodiments of the present invention, and are not intended to limit the scope and scope of the present invention. Various changes and modifications made by those skilled in the art to the technical solutions of the present invention are within the scope of the present invention.

Claims

The washing machine running balance detecting device is characterized in that: a plurality of pairs of magnets are circumferentially symmetrically mounted on the upper portion of the outer tub, and a plurality of pairs of reed switches are disposed correspondingly in the upper portion of the box body or the lower portion of the control disc seat, and the reed switch tube is installed on the inner wall of the box body Or controlling the inner wall of the disc holder closest to the outer tub, the reed switch and the magnet constitute a reed sensor for detecting the balance of the operation of the washing machine;

A magnet is mounted on the inner tub, and a reed switch is correspondingly disposed on the cabinet or the control disc base. The reed switch and the magnet constitute a reed sensor for detecting the rotation speed of the inner tub.
The operation balance detecting device for a washing machine according to claim 1, wherein four magnets are uniformly mounted on the outer circumference of the outer tub of the washing machine, and four reed switches are disposed at a corresponding height of the upper portion of the casing or the lower portion of the control tray. The reed switch is installed on the inner wall of the box or the inner wall of the control disc seat is closest to the outer tub. The reed switch and the magnet constitute a reed sensor for detecting the balance of the operation of the washing machine.
The operation balance detecting device for a washing machine according to claim 2, wherein four magnets are evenly mounted circumferentially on the upper portion of the outer tub, and each of the four sides of the lower portion of the casing or the lower portion of the control tray corresponds to a middle tangent point of the outer tub. A reed switch is provided at the height of the corresponding magnet.
The operation balance detecting device for a washing machine according to claim 1, wherein a magnet is mounted on the upper portion of the inner tub or the balance ring on the upper portion of the inner tub, and any one of the four sides of the cabinet or the control tray corresponds to the middle tangent point of the inner tub. Correspondingly, a reed switch is provided, and the reed switch and the magnet constitute a reed sensor for detecting the rotation speed of the inner tub.
The operation balance detecting device for a washing machine according to claim 1, wherein a magnet is mounted on the bottom end of the inner tub, and a polar end of the magnet is directed to a corresponding reed switch disposed on the casing or the outer tub, the reed switch And the magnet constitutes a reed sensor that detects the rotation speed of the inner tub.
The washing machine operation balance detecting method is characterized in that: using the device according to any one of claims 1 to 5, the imbalance of the outer tub is biased toward the box body, and the magnet at the upper part of the outer tub is close to the reed switch on the box body, so that the washing machine is balanced. The on-off state of the reed switch in the reed sensor is changed, and the MCU of the washing machine control panel detects the balance of the operation of the washing machine according to the output level change of the reed switch;

The magnet on the inner barrel is rotated with the inner barrel to interact with the reed switch corresponding to the box, so that the on-off state of the reed switch in the reed sensor detecting the rotation speed of the inner barrel is changed, and the counter is used to count the output of the reed switch. The number of levels of conversion, compare it with the set value to determine whether the inner barrel speed is normal.
The washing machine operation balance detecting method according to claim 6, wherein when the inner tub rotation speed is detected, the inner tub rotation speed in the washing state of the washing machine and the inner tub rotation speed in the dehydrated state are respectively detected.
The washing machine operation balance detecting method according to claim 6, wherein when the inner tub does not rotate, The output levels of the respective reed switches in the reed sensors that detect the balance of the operation of the washing machine are the same.
The washing machine operation balance detecting method according to claim 6, wherein the minimum rotation speed value of the inner tub in the washing state and the dehydration state is set and stored in the washing machine control panel micro control unit MCU.