WO2018121392A1

WO2018121392A1 - Washing machine control method and washing machine

Info

Publication number: WO2018121392A1
Application number: PCT/CN2017/117630
Authority: WO
Inventors: 邓金柱; 吕佩师; 许升; 黄振兴
Original assignee: 青岛海尔洗衣机有限公司
Priority date: 2016-12-28
Filing date: 2017-12-21
Publication date: 2018-07-05
Also published as: CN108252025B; CN108252025A

Abstract

A washing machine control method and a washing machine, the method comprising the following steps: Step 1, beginning a laundry program; Step 2, an inner drum rotating, and a master controller comparing a magnetic field parameter result detected by a magnetic sensor to a normal range of magnetic field parameter results, and, depending on whether the obtained magnetic field parameter result is or is not within a normal range, executing step 3 or step 4, respectively; Step 3, if the obtained magnetic field parameter result is within the normal range, executing a washing program; Step 4, if the obtained magnetic field parameter is not within the normal range, alerting a user. By means of the present control method, a user may discover and remove a foreign object, preventing loss. The present washing machine has low cost, high detection accuracy and few use restrictions.

Description

Washing machine control method and washing machine

Technical field

The invention belongs to the technical field of washing machines, and in particular to a washing machine control method and a washing machine.

Background technique

With the improvement of people's living standards, washing machines have gradually become one of the necessary home appliances in most people's homes. Most people use the washing machine as the main tool for washing clothes. Because people live faster, they often forget to check the clothes pocket when washing. The foreign objects in the pocket of the clothes contain magnetic materials, mainly those carried by coins, mobile phones, keys, etc., when the above-mentioned foreign objects are put into the washing machine, in the subsequent washing, the water inflow and the washing in the drum will cause the above-mentioned articles to be damaged. Or it may cause scratches, abrasions, and even damage to the washing machine. In order to avoid the above situation, the user may be damaged. The prior art detects the clothes by optical detection or image recognition, but the detection accuracy is low or the cost is high. The reason is that a wide range of applications have not been achieved.

Chinese Patent Publication No. CN104711819A discloses a washing machine with a metal detector and a control method therefor, a washing machine with a metal detector, and a front door of the washing machine is provided with a circular door, which further includes a main a controller and a metal detector and an alarm device connected to the controller, wherein the metal detector is annular and installed outside the circumference of the circular door, and the signal output of the main controller metal detector is detected Whether the clothes entering the washing machine have metal objects, and when the metal object is detected, the alarm device is controlled to perform an alarm. The washing machine with the metal detector can actively detect and remind the metal objects in the clothes, thereby improving the intelligent level of the washing machine. Using the washing machine control method, if the metal washing machine is detected, an alarm will be promptly prompted to help the user lock the metal in the piece of clothing that the user just put in, and the metal object can be accurately positioned. The metal detector of the present application detects a voltage signal and generates a current according to the movement of the metal object. The structure of the application is complicated, the installation and use are limited, the cost is high, and it is not suitable for widespread promotion, and the user needs to put one piece of the product. After entering the clothes, it is necessary to pay attention to whether it will alarm, the sensitivity of the test is required to be high, and the detection speed is fast. The user generally opens the washing program after putting it into the clothes, which does not meet the user's usage habits.

The Chinese Patent Publication No. CN105220402A discloses a washing machine dehydration program control method, which detects the presence of foreign matter in a dehydration process, and removes foreign matter during the dehydration process, possibly in the process of washing, the foreign matter destroys the washing machine, or causes clothing. Scratched and worn.

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

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a washing machine control method and a washing machine, which can find a foreign matter having magnetic material in the laundry after the user puts the laundry into the washing machine and rotates the inner tub to avoid the washing machine. And foreign matter causes unnecessary loss, in line with the user's washing habits.

In order to achieve the above object, the present invention adopts the following technical solutions:

A washing machine control method comprising the following steps:

Step 1. Start the laundry process;

Step 2, the inner barrel rotates, the main controller compares the magnetic field parameter result detected by the magnetic sensor with the normal range magnetic field parameter result, and performs step 3 and step 4 respectively according to the obtained magnetic field parameter result in the normal range;

Step 3. If the obtained magnetic field parameter result is within the normal range, perform a washing process;

Step 4. If the obtained magnetic field parameter is not within the normal range, the user is prompted.

The foreign matter in the present invention is a substance containing a magnetic material, and is mainly for a portable object such as a mobile phone, a key, a coin, and the like which are easily wrapped in the laundry. The magnetic sensor in the present invention can sense the movement of the magnetic substance, and when the user puts the laundry and restarts When the drum of the motor washing machine rotates, a change of the magnetic field is generated. The magnetic sensor can capture this change and generate a signal and input it to the main controller of the washing machine. The main controller of the washing machine forms an alarm message according to the above signal to prompt the user to avoid the loss.

The user of the present invention is prompted to use an alarm device, and the alarm device can perform an alarm notice by means of a sounding component emitting a sound and/or a display component displaying a prompt code. The alarm device can be set on the washing machine to be controlled by the main controller, or can be set in the mobile terminal and controlled by the server.

Further, the magnetic field parameter result includes a magnetic field waveform, a frequency, or a calculated average value or integrated value obtained during the detection time.

Further, the normal range of magnetic field parameters results in a uniform periodic magnetic field signal generated by the magnetic sensor under normal operating conditions of the washing machine.

Further, the magnetic field parameter result of the normal range is a magnetic field parameter result that normally changes when the laundry rolls in the barrel after the inner barrel rotates during the detection period.

Further, after step 4, the following steps are further included:

Step 5: The main controller detects the prompt information or prompts whether the program is closed.

If yes, go to step 2;

If not, the main controller detects whether the user closes the above prompt information or prompting program.

If yes, go to step 2;

If not, the washing machine pauses after a period of time and then enters standby or shutdown.

The prompt information or prompting procedure of step 5 in the present invention is the information or program for prompting the user in step 4. If the main controller detects the prompt information or prompts the program to close, step 2 is performed to perform the washing process, if the prompt is not closed The information or prompting program, the washing machine pauses after the set time, and enters the standby or stop state after a pause.

The prompt information or the prompting program of the present invention may be an alarm device provided on the washing machine controlled by the main controller, or may be sent by a mobile terminal or other device connected to the control center through a network.

Another object of the present invention is to provide a washing machine including a magnetic sensor with which the above-described washing machine control method is executed.

Further, the magnetic sensor is disposed on the casing near the door of the washing machine body toward the inner tub. Preferably, the effective detecting distance of the magnetic sensor is greater than the radius of the washing tub.

The magnetic sensor of the present invention is disposed on the casing near the door of the washing machine door toward the inner tub, so that the amount of the magnetic sensor is saved, and the magnetic field change in the laundry can be detected using a small amount of the magnetic sensor, and the installation is convenient.

Further, the magnetic sensor is a high-sensitivity linear magnetic sensor, and the magnetic sensor is integrated into a module, and the module is a differential amplified voltage output module.

Further, the differential amplifying voltage output module is connected to the magnetic sensor by a low-voltage linear voltage regulator, and the voltage signal generated by the magnetic sensor passes through the amplifying circuit and outputs a signal.

Further, the voltage signal passing through the low voltage linear regulator is also supplied to the amplifying circuit.

Since the magnitude of the magnetic field is inversely proportional to the cube of the distance, that is, the farther the distance is, the faster the magnetic field decays, and the smaller the magnitude of the induced magnetic field, the effective detection distance on the washing machine needs to be at least larger than the radius of the washing tub, so the magnetic field It will be weak, and the signal capture of weak magnetic field needs to be realized by a magnetic sensor with high sensitivity and low noise. Therefore, the present invention uses a magnetic sensor with high sensitivity and needs to be integrated into one module so that the output signal can be amplified, so that the washing machine is The main controller can recognize that the sensor used in the present invention is a linear magnetic sensor, and the module is a differential amplified voltage output module. In addition, because the amplification factor is large, the power frequency signal is also amplified, so the amplified signal needs to be digitally filtered. , remove the 50Hz (commercial power) interference signal.

With the above technical solutions, the beneficial effects of the present invention are as follows:

(1) A washing machine control method according to the present invention, wherein the foreign matter is a substance with a magnetic material, and a magnetic sensor is mounted on the washing machine to detect the movement of the magnetic object, and when the user puts on the laundry and then starts the motor washing machine, the barrel rotates. The change of the magnetic field, the magnetic sensor can capture this change and generate a signal and input to the main controller of the washing machine. The main controller of the washing machine forms an alarm message to prompt the user according to the above signal, so that the user can find the foreign object and take it out before the water washing. Avoid losses, more in line with the user's washing habits. Compared with the original method, the inspection method provided by the present invention has the advantages of low cost, high detection precision, and low installation and use restrictions.

(2) The washing machine of the present invention compares the magnetic field parameter result detected by the magnetic sensor with the magnetic field parameter result of the normal range by the main controller to determine whether the foreign matter of the magnetic material is contained in the laundry, and the washing machine control method is The foreign matter is treated to avoid damage that may be caused by foreign matter.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. It is apparent that the drawings in the following description are only some embodiments, and other drawings may be obtained from those skilled in the art without departing from the drawings. In the drawing:

Figure 1: The principle of the magnetic anomaly signal caused by the mobile phone;

Figure 2: Block diagram of the module amplification circuit;

FIG. 3 is a diagram showing changes in output voltage when a foreign object is detected as a mobile phone according to Embodiment 2 of the present invention; FIG.

Fig. 4 is a diagram showing changes in the magnetic field when the foreign matter is detected as a mobile phone according to the second embodiment of the present invention.

It is to be understood that the drawings and the written description are not intended to limit the scope of the present invention in any way.

detailed description

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

The foreign matter described in the present invention is a substance containing a magnetic material such as a mobile phone, a key, and a coin with a magnetic material. The main controller of the invention detects the magnetic field parameter result detected by the magnetic sensor, and compares the detected magnetic field parameter result with the normal range magnetic field parameter result, if the detected magnetic field parameter result is within the normal range magnetic field parameter result If the foreign object does not exist, the washing machine is started, and the washing process is performed; if the detected magnetic field parameter result is not within the normal range magnetic field parameter result, and the foreign matter is proved to exist, the main controller controls the alarm device to issue an alarm signal, so that the user can enter Foreign matter is found before water washing and taken out to avoid loss.

Embodiment 1

A washing machine control method comprising the following steps:

Step 1. Start the laundry process;

In this embodiment, the magnetic field parameter result includes a magnetic field waveform, a frequency, or a calculated average or integrated value obtained during the detection time.

Among them, the normal range of magnetic field parameters results in a uniform periodic magnetic field signal generated by the magnetic sensor under normal working conditions.

In a further solution, the magnetic field parameter result of the normal range is a magnetic field parameter result that normally changes when the laundry rolls in the barrel after the inner barrel rotates during the detection period.

In the embodiment, when the foreign matter contained in the washing machine is contained by the user, since the magnetic permeability of the ferromagnetic substance is much higher than that of the air, the three-dimensional space around it will concentrate or deform the earth magnetic field, thereby causing an abnormal magnetic field signal. With the magnetic sensor of the present invention, the magnetic field abnormality signal can be captured, and the magnetic characteristic curve is exhibited, thereby judging the existence of foreign matter.

Preferably, the magnetic sensor is integrated into a module, and the module is a differential amplified voltage output module.

Preferably, the differential amplifying voltage output module is connected to the magnetic sensor by a low-voltage linear voltage regulator, and the voltage signal generated by the magnetic sensor passes through the amplifying circuit and outputs a signal.

Preferably, the voltage signal passing through the low voltage linear regulator can also be delivered to the amplifying circuit. The block diagram of the module amplifying circuit in this embodiment is shown in FIG. 2 .

Since the magnitude of the magnetic field is inversely proportional to the cube of the distance, that is, the farther the distance is, the faster the magnetic field decays, and the smaller the magnitude of the induced magnetic field, the effective detection distance on the washing machine needs to be at least larger than the radius of the washing tub, so the magnetic field It will be weak, and the signal capture of weak magnetic field needs to be realized by a magnetic sensor with high sensitivity and low noise. Therefore, the present invention uses a magnetic sensor with high sensitivity and needs to be integrated into one module so that the output signal can be amplified, so that the washing machine is The main controller can recognize that the sensor used in the present invention is a linear magnetic sensor, and the module is a differential amplified voltage output module. In addition, because the amplification factor is large, the power frequency signal is also amplified, so the amplified signal needs to be digitally filtered. , remove the interference signal of the mains.

Embodiment 2

In this embodiment, the foreign object is used as the mobile phone. The outer casing and the speaker part of the mobile phone are made of ferromagnetic material. Since the magnetic permeability of the ferromagnetic substance is much higher than that of the air, the three-dimensional space around it will concentrate or change the magnetic field. The phase causes a magnetic field anomaly signal. As shown in Figure 1, the magnetic field anomaly signal can be captured by a sensitive magnetic sensor, exhibiting a magnetic characteristic curve, and thereby determining the presence of the mobile phone.

The washing machine control method in this embodiment includes the following steps:

Step 1. Start the laundry process;

Step 4. If the obtained magnetic field parameter is not within the normal range, the alarm device sends an alarm signal.

If yes, go to step 2;

In this embodiment, the magnetic field parameter result is a comparison of the voltage of the magnetic field and the waveform of the magnetic field during the detection of a period of time.

The prompt in this embodiment is prompted by an alarm device installed on the washing machine controlled by the main controller, and the alarm device performs an alarm based on the detected information.

The magnitude of the magnetic field is inversely proportional to the cube of the distance. That is to say, the farther the distance is, the smaller the magnetic field is. If it is necessary to accurately measure the magnitude of the magnetic field signal, a magnetic sensor with high sensitivity and low noise must be required. A highly sensitive magnetic sensor is used and a module needs to be integrated so that the output signal can be amplified. In this embodiment, the module is powered by a low voltage linear regulator and transmitted to the magnetic sensor. The magnetic sensor transmits the voltage signal to the amplifying circuit, and then passes through the module output signal, wherein the low voltage linear regulator transmits the voltage signal to In the amplifying circuit, the output of the module is increased by the design of the module, and the power frequency signal is also amplified. Therefore, the amplified signal needs to be digitally filtered to remove the interference signal of the 50 Hz mains.

The foreign object in the invention is a mobile phone, and the magnetic field parameters generated by the magnetic sensor are detected at regular intervals. In this embodiment, the module measures the signal change generated when the distance of the mobile phone is 40 cm, and the peak portion corresponds to the time period of the mobile phone, and the detection is performed. The results of the measurements are shown in Figures 3 and 4.

Embodiment 3

A washing machine compares a magnetic field parameter result detected by a magnetic sensor with a normal range magnetic field parameter result by a main controller to determine whether a foreign matter of a magnetic material is contained in the laundry, and the foreign matter is processed by the above-mentioned washing machine control method to avoid Foreign matter may cause damage.

If the detected magnetic field parameter result is within the normal range of the magnetic field parameter result, the foreign matter is considered to be absent, the washing machine is started, and the washing process is performed. If the detected magnetic field parameter result is not within the normal range magnetic field parameter result, the foreign matter is proved to exist. The alarm device sends an alarm signal to prompt the user so that the user can find foreign matter and take it out before washing in water to avoid loss.

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

A washing machine control method, comprising the following steps:

Step 1. Start the laundry process;

Step 2, the inner barrel rotates, the main controller compares the magnetic field parameter result detected by the magnetic sensor with the normal range magnetic field parameter result, and performs step 3 and step 4 respectively according to the obtained magnetic field parameter result in the normal range;

Step 3. If the obtained magnetic field parameter result is within the normal range, perform a washing process;

Step 4. If the obtained magnetic field parameter is not within the normal range, the user is prompted.
The washing machine control method according to claim 1, wherein the magnetic field parameter result comprises a magnetic field waveform, a frequency, or a calculated average value or integral value obtained during the detection time.
A washing machine control method according to claim 1 or 2, wherein the normal range of magnetic field parameters results in a uniform periodic magnetic field signal generated by the magnetic sensor under normal operating conditions of the washing machine.
The washing machine control method according to any one of claims 1 to 3, characterized in that the magnetic field parameter result of the normal range is a magnetic field parameter result which changes normally when the laundry rolls in the barrel after the inner tub rotates during the detecting period.
The washing machine control method according to any one of claims 1 to 4, further comprising the following steps after the step 4:

Step 5: The main controller detects the prompt information or prompts whether the program is closed.

If yes, go to step 2;

If not, the main controller detects whether the user closes the above prompt information or prompting program.

If yes, go to step 2;

If not, the washing machine pauses after a period of time and then enters standby or shutdown.
A washing machine, characterized in that the washing machine has the control method according to any one of claims 1-5.
A washing machine according to claim 6, wherein said magnetic sensor is disposed on the casing adjacent to the door of the washing machine door toward the inner tub. Preferably, the effective detecting distance of the magnetic sensor is larger than the radius of the washing tub.
A washing machine according to claim 6 or 7, wherein the magnetic sensor is a high sensitivity linear magnetic sensor, the magnetic sensor is integrated into a module, and the module is a differential amplification voltage. Output module.
A washing machine according to claim 8, wherein said differential amplified voltage output mode The power supply is connected to the magnetic sensor through a low-voltage linear regulator, and the voltage signal generated by the magnetic sensor passes through the amplifier circuit to output a signal.
A washing machine according to claim 9, wherein the voltage signal passing through the low voltage linear regulator is also supplied to the amplifying circuit.