RU2495173C1 - Control method of machine for linen treatment - Google Patents

Abstract

FIELD: textiles, paper.

SUBSTANCE: control method of a machine for linen treatment is proposed, comprising the step on which during a predetermined period of time, the drum is rotated at a speed in the range of revolutions per minute, which is located in the transition region and above, at a predetermined inclination angle of acceleration, which is smaller the minimum predetermined inclination angle of acceleration the drum speed in the cycle of rapid rotation.

EFFECT: improvement of the method.

14 cl, 9 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a method for controlling a laundry machine.

BACKGROUND OF THE INVENTION

Basically, a washing machine may include washing, rinsing, and spinning cycles. In this description, the fast rotation cycle includes the step of rotating the drum available in such a laundry machine at the highest revolutions per minute. Because of this step, the fast rotation cycle will create quite strong noise and vibration, which must be eliminated in the known solutions to which the present invention relates.

Disclosure of invention

Technical problem

Thus, the present invention relates to a method for controlling a laundry machine.

The aim of the present invention is to provide a method of controlling a machine for processing linen, with which this problem can be solved.

Solution

To solve the problems, the aim of the present invention is to provide a method for controlling a machine for processing laundry, comprising the step of rotating the drum in the rpm range in the transition region and above, for a given angle of inclination of the acceleration less than the preset minimum angle of inclination of the acceleration of the drum speed in fast rotation cycle for a given period of time.

Advantages of the Invention

The present invention has the following advantages.

If the fast rotation cycle is carried out in accordance with the control method of the present invention, the noise and vibration generated by the laundry machine can be reduced, and at the same time, the time of the fast rotation cycle can be reduced.

Brief Description of the Drawings

The accompanying drawings, which are included to provide a further understanding of the present disclosure and form part of this application, illustrate embodiments of the present invention and together with the description serve to explain the principle of the present invention.

In the drawings:

figure 1 is a view in cross section of a machine for processing linen, which uses the method of controlling the rapid rotation cycle in accordance with the present invention;

figure 2 is a sectional view showing the state of the connection in figure 1;

figure 3 is a curve showing the dependence of the mass on the natural frequency;

4 is a curve showing the vibration characteristics of a machine for processing linen;

5-9 are curves showing rpm changes in accordance with control methods.

The best embodiment of the invention

Depending on the laundry machine in accordance with an embodiment, the tub may be fixedly supported in the casing, or it may be supported by a flexible supporting structure, such as a suspension assembly, which will be described later. In addition, maintaining the tank may be between maintaining the suspension assembly and fully stationary support.

That is, the tank can be flexibly supported by the suspension unit, which will be described below, or it can be supported completely stationary to move more rigidly. Although not shown in the drawings, the casing may be made different from the embodiments that will be described below. For example, in the case of an integrated laundry treating machine, the predetermined space into which the laundry treating machine will be installed may be formed by a wall structure instead of a housing. In other words, the integrated laundry machine may not include a casing configured to independently form its appearance.

In FIGS. 1 and 2, if the drum 30 and 130 rotates after loading the laundry 1 into the drum 30 and 130 of the laundry machine in accordance with the above embodiments, quite a lot of noise and vibration may occur depending on the position of the laundry 1. For example, rotation of the drum 30 and 130 in a state of laundry distributed unevenly in the drum 30 and 130 (hereinafter, “unbalanced rotation”), strong noise and vibration can occur. Especially if the drum 30 and 130 rotates at high speed to quickly rotate the laundry, noise and vibration can be a problem.

As can be seen in FIG. 2, the tub 120 installed in the laundry machine is fixedly supported in the casing. The tank 120 includes a front side of the tank configured to form the front of the tank 120, and a rear side of the tank configured to form the rear of the tank. The front side of the tank and the rear side of the tank are assembled with each other using screws to form a predetermined space large enough to accommodate the drum. The rear side of the tank contains a hole formed in its rear portion, and the inner periphery of the rear portion forming the rear side of the tank is connected to the outer periphery of the rear gasket 125. The rear plate 124 of the tank contains a through hole formed in its center for the shaft to pass through it. The rear gasket 125 is made of flexible material to prevent vibration from transmitting the back plate 124 of the tank to the rear side of the tank.

The rear side of the tank includes a rear surface, and the rear surface of the tank, the rear plate of the tank 124 and the rear gasket 125 can form the rear wall of the tank 120. The rear gasket 125 is sealed to connect to the rear plate of the tank 124 and the rear side of the tank, so that there is washing water, contained in the tank cannot leak. The back plate 124 of the tank vibrates with the drum during rotation of the drum. In this case, the back plate 124 of the tank is located at a distance from the rear side of the tank, sufficient not to collide with the rear side of the tank. Since the rear gasket 125 is made of flexible material, the rear plate 124 of the tank can relatively move without collision with the rear side of the tank. Rear gasket 125 may include a corrugated portion stretched to a predetermined length to allow relative movement of the tank back plate 124.

An element for preventing the penetration of foreign substances, configured to prevent the penetration of foreign substances between the tank and the drum, can be connected to the front portion of the front side of the tank. The element for preventing the penetration of foreign substances is made of flexible material and is mounted on the front side of the tank. In this description, an element for preventing the ingress of foreign substances can be made of the same material as the rear gasket 125. Hereinafter, an element for preventing the ingress of foreign substances will be referred to as a “front gasket”.

Drum 130 includes a front portion of a drum, a central portion and a rear portion of a drum. Counterweights 170 and 190 can be installed at the front and rear of the drum, respectively. The back of the drum is connected to the cross-shaped element, and the cross-shaped element is connected to the shaft 150. The drum 130 rotates in the tank 120 due to the torque transmitted through the shaft 150.

The shaft 150 is directly connected to the electric motor 170a by passing through the back plate 124 of the tank. Specifically, the rotor included in the electric motor 170a is directly connected to the shaft 150. The bearing housing 160 is connected to the rear portion of the rear tank plate 124, and the bearing housing 160 rotatably supports a shaft located between the electric motor 170a and the rear tank plate 124.

The stator, which is part of the electric motor 170a, is mounted on the bearing housing 160, and the rotor is located around the stator. As mentioned above, the rotor is directly connected to the shaft 150. In this document, the electric motor 170a is an electric motor with an external rotor and is directly connected to the shaft 150.

The bearing housing 160 is supported by a suspension assembly relative to the housing base 111. The suspension unit 180 includes three perpendicular support elements and two inclined support elements configured to support the bearing housing 160 at an angle with respect to the forward and backward directions.

Suspension assembly 180 may include a first cylinder spring 185, a second cylinder spring (not shown), a third cylinder spring (not shown), a first cylinder damper 186 and a second cylinder damper (not shown).

A first cylinder spring 185 is connected between the first suspension bracket 183 and the casing base 111. A second cylinder spring is connected between the suspension bracket (not shown) and the casing base 111.

A third cylinder spring (not shown) is directly connected between the bearing housing 160 and the housing base 111.

The first cylinder damper 186 is mounted at an angle between the first suspension bracket 183 and the rear portion of the casing base 111. The second damper of the cylinder is installed at an angle between the second bracket of the suspension and the rear portion of the base 111 of the casing.

The first cylinder spring 185, the second cylinder spring and the third cylinder spring of the suspension assembly 180 can be sufficiently resiliently connected to the casing base 111 to allow the drum to move forward / backward and left / right, not fixedly connected to the casing base 111. That is, they are resiliently supported by the base 111 to allow the drum to rotate a predetermined angle in the forward / backward and left / right directions relative to the joint portion.

The perpendicular suspensions of the suspension unit can be made with the possibility of elastic damping of vibration, and the inclined suspension can be made with the possibility of reducing vibration. That is, in a vibration system including a spring and a damping means, perpendicular suspensions are used as a spring, and inclined suspensions are used as damping means.

The front side of the tank and the rear side of the tank are fixedly mounted in the casing 110, and the vibration of the drum 130 is supported with the possibility of damping node 180 of the suspension. The supporting structure of the tub 120 and the drum 130 may be referred to as substantially “separate” so that the tub 120 cannot vibrate even when the drum 130 vibrates.

Bearing housing 160 and suspension brackets can be connected to each other using the first and second weights 431 and 430.

Figure 3 presents a curve showing the dependence of the mass on the natural frequency. Assume that in vibration systems of two laundry machines, two laundry machines have masses m0 and m1, respectively, and the maximum amounts of contained laundry are ∆m, respectively. Then the transition regions of the two laundry machines can be determined taking into account ∆nf0 and ∆nf1, respectively. In this case, the amount of water contained in the laundry will not be taken into account for a while.

Meanwhile, as can be seen in FIG. 3, the laundry machine with a lower mass m1 has a transition region range larger than the laundry machine with a larger mass m0. That is, the range of the transition region having a vibration of the recorded amount of laundry becomes larger, the smaller the mass of the vibration system becomes.

The ranges of the transition regions will be discussed with respect to the known laundry machine and the laundry machine of this embodiment.

The known laundry machine has a structure in which vibration is actually transmitted from the drum to the tank, causing the tank to vibrate. Therefore, taking into account the vibration of the known laundry machine, the tank is essential. However, usually the tank has not only its own weight, but also large weights in front, behind or on its peripheral surface for balancing. Therefore, the known machine for processing linen has a large mass of the vibration system.

In contrast, in the laundry machine of this embodiment, since the tank is not only not weighed, but also separated from the drum due to the supporting structure, the tank may not be taken into account when considering the vibration of the drum. Therefore, the laundry machine of this embodiment of the invention may have a relatively small mass of vibration system.

Then, as shown in FIG. 3, the known laundry treating machine has a mass m0, and the laundry treating machine of this embodiment has a mass m1, which results in the laundry treating machine of this embodiment having a large transition region.

In addition, if you simply take into account the amount of water contained in the laundry, ∆m in FIG. 3 will become larger, increasing the difference in the ranges of the transition regions. Since in the known laundry machine, water flows into the tub from the drum, even if water is removed from the laundry by rotating the drum, the decrease in the mass of water that occurs as a result of rapid rotation is small. Since the laundry treating machine of this embodiment comprises a tub and a drum separated from each other in view of vibration, water exiting the drum immediately affects the vibration of the drum. That is, the effect of the change in the mass of water in the laundry is greater in the laundry treating machine of this embodiment than in the known laundry treating machine.

For the above reason, although the known laundry treating machine has a transition region of about 200 ~ 270 rpm, the initial revolutions per minute in the transition region of the laundry treating machine according to this embodiment may be similar to the initial revolutions per minute of the transition region of the known laundry machine processing linen. The final revolutions per minute in the transition region of the laundry machine according to this embodiment can increase more than the revolutions per minute calculated by adding a value of approximately 30% of the initial revolutions per minute to the initial revolutions per minute. For example, the transition region ends at rpm, calculated by adding approximately 80% of the initial rpm to the initial rpm. According to this embodiment, the transition region may include a rpm range of about 200-350 rpm.

Meanwhile, by reducing the intensity of vibration of the drum, the imbalance can be reduced. For this, the distribution of laundry in the drum is as uniform as possible before the drum rotational speed enters the transition region.

If a counterweight is used, a method may be considered in which the rotational speed of the drum passes through the transition region, while the moving bodies located in the counterweight are located on the side opposite to the unbalance of the laundry. In this case, it is preferable that the moving bodies are located exactly opposite the imbalance in the middle of the transition region.

However, as described above, the transition region of the laundry machine according to this embodiment of the invention is relatively wide compared to the transition region of the known laundry machine. Because of this, even if the step of uniformly distributing the laundry or balancing the balls in a rpm range smaller than the transition region is carried out, the laundry may be in a mess, or balancing may not be performed at a drum speed passing through the transition region.

As a result, balancing can be performed at least once in the laundry machine according to this embodiment before and when the drum speed passes through the transition region. In this description, balancing can be considered the rotation of the drum at a constant speed over a given period of time. This balancing allows the movable body of the counterweight only to reduce the degree of imbalance with respect to opposite positions of the laundry. By expanding, a uniform distribution of the laundry is ensured. Ultimately, balancing is performed as the drum speed passes through the transition region, and noise and vibration due to the expansion of the transition region can be prevented.

In this description, when balancing is performed before the drum speed passes through the transition region, balancing can be performed in a rpm range other than rpm of a known laundry machine. For example, if the transition region begins at 200 rpm, balancing is performed in a rpm range of approximately less than 150 rpm. Since the known laundry machine has a relatively less wide transition region, it is not so difficult for the drum speed to pass through the transition region even when balancing is carried out at rpm of approximately less than 150 rpm. However, the laundry machine in accordance with this embodiment has a relatively wide transition region, as described above. If balancing is carried out at such low revolutions per minute as in the known laundry machine, the positions of the moving bodies may be random due to balancing carried out at a drum speed passing through the transition region. As a result, the laundry machine in accordance with this embodiment can increase the balancing revolutions per minute compared to conventional balancing revolutions per minute, when the balancing is carried out before the drum speed enters the transition region. That is, if the initial revolutions per minute in the transition region are determined, the balancing is carried out in the range of revolutions per minute, large revolutions per minute, calculated by subtracting the value of approximately 25% of the initial revolutions per minute from the initial revolutions per minute. For example, the initial revolutions per minute in the transition region are approximately 200 rpm, balancing can be carried out in the rpm range of large 150 rpm, which is less than 200 rpm.

In addition, the degree of imbalance can be measured during balancing. That is, the control method may further include a step for measuring the degree of imbalance during balancing and for comparing the measured degree of imbalance with an acceptable degree of imbalance, providing an increase in the speed of the drum. If the measured degree of imbalance is less than the allowable degree of imbalance, the drum speed increases after balancing to be outside the transition region. On the contrary, if the measured degree of imbalance is an acceptable degree of imbalance or more, the step of uniformly distributing the laundry may be re-performed. In this case, the allowable degree of imbalance may differ from the allowable degree of imbalance, which provides initial acceleration.

Meanwhile, the vibration characteristics of the laundry machine according to this embodiment of the present invention will be described with reference to FIG.

As the drum rotational speed increases, a region is created (hereinafter referred to as the “transitional vibration region”) in which an irregular transitional vibration with a high amplitude occurs. The region of transitional vibration arises irregularly with a high amplitude before the transition of the vibration to the region of stable vibration (hereinafter referred to as the “stable region”) and has predetermined vibrational characteristics if a vibration system (laundry machine) is developed. Although the transitional vibration region differs depending on the type of laundry machine, the transitional region occurs approximately in the range of 200-270 rpm. It is believed that the transition region is caused by resonance. Therefore, it is necessary to develop a counterweight, taking into account the effective balancing in the field of transient vibration.

Meanwhile, as described above, in the laundry machine according to this embodiment of the present invention, the vibration source, i.e., the electric motor and the drum connected to the electric motor, are connected to the tub 120 through the rear gasket 125. Thus, the vibration, occurring in the drum is transferred slightly to the tank, and the drum is supported by a damping means and a suspension unit 180 by means of a bearing housing 160. As a result, tank 120 can be directly secured to casing 110 without the use of damping means.

As a result of the studies, vibration characteristics, usually not observed, were determined that were installed in a laundry machine in accordance with the present invention. According to a known laundry machine, vibration (displacement) becomes constant after passing through the transitional vibration region. However, in the laundry machine according to this embodiment of the present invention, a region (hereinafter referred to as “irregular vibration”) can be created in which the vibration becomes constant after passing through the transitional vibration region and again becomes large. For example, if there is a maximum drum displacement or more that occurs in a rpm range smaller than the transition region, or a maximum drum displacement or a more stable stage in the rpm range larger than the transition region, it is determined that irregular vibration has occurred. Alternatively, if there is a drum offset of +20 - -20% of the average drum offset in the transition region, or an offset equal to or greater than 1/3 or more of the maximum drum offset at the natural frequency of the transition region, it can be determined that an irregular vibration.

However, as a result of the studies, irregular vibration occurred in a rpm range larger than the transition region, for example, occurred in an area (hereinafter referred to as the “irregular vibration region”) in the range of about 350-1000 rpm. Irregular vibration can occur as a result of using a counterweight, damping system and rear gasket. Therefore, in this laundry machine, a counterweight needs to be developed taking into account the irregular vibration region as well as the transient vibration region.

For example, the counterweight includes a ball counterweight, it is preferable that the design of the counterweight, i.e. the ball size, the number of balls, the shape of the rolling groove, the viscosity of the oil and the oil filling level, be selected taking into account the area of irregular vibration, as well as the area of transitional vibration. When considering the region of transitional vibration and / or the region of irregular vibration, especially when considering the region of irregular vibration, the ball counterweight has a larger diameter of 255.8 mm and a smaller diameter of 249.2 mm. The cavity of the rolling groove in which the ball is contained has a cross-sectional area of 411.93 mm ² . The number of balls is 14 in front and behind, respectively, and the ball has a size of 19.05 mm. Silicon-based oil, such as polydimethylsiloxane, is used as an oil. Preferably, the oil has a viscosity of 300 St at room temperature and has a fill level of 350 cm ³ .

In addition to the design of the counterweight, taking into account the control, it is preferable to consider the region of irregular vibration, as well as the region of transitional vibration. For example, to prevent irregular vibration, if an irregular vibration region is determined, balancing can be performed at least once before, during and after the drum speed passes through the irregular vibration region. Herein, if the rotational speed of the drum is relatively high, the balancing of the counterweight may not be carried out properly, and balancing may be carried out while reducing the rotational speed of the drum. However, if the rotation speed of the drum is reduced to be less than the transition region for balancing, it must again pass through the transition region. When reducing the speed of rotation of the drum for balancing, the reduced speed of rotation may be greater than the transition region.

The control method is necessary to reduce noise and vibration, while the rotation speed of the drum passes through the transition region and / or when it passes through the region of irregular vibration, as described above. As follows below, a fast rotation cycle of the laundry machine having the aforementioned configuration will be described, and then a control method configured to reduce noise and vibration will be described.

5 is a curve showing the change in rpm of the drum over time in accordance with the method of controlling the fast rotation cycle. In accordance with FIG. 5, the horizontal axis means “time” and the vertical axis means “rotation speed” of the drum 30 and 32, which is a change in revolutions per minute.

As can be seen in FIG. 5, the fast rotation cycle control method in accordance with the present invention includes a laundry distribution step (S100) and a fast rotation step (S200).

The laundry distribution step (S100) is used to uniformly distribute the laundry while the drum rotates at a relatively low speed. The fast rotation cycle (S200) is used to rotate the drum at a relatively high speed to remove moisture contained in the laundry. In this document, such a laundry distribution step and a quick rotation step are named with respect to their main functions. The functions of the steps may not be limited to names. For example, in the laundry distribution step, moisture can be removed from the laundry by rotating the drum as well as the distribution of laundry.

The laundry distribution step (S100) included in the control method in accordance with the present invention may include a wet laundry measurement step (S110), a laundry unraveling step (S130), and an unbalance measurement step (S150). The fast rotation step (S200) may include a step (S210) of passing through the transition region and an acceleration step (S230). Each of the above steps will be described below.

At the end of the rinse cycle, the laundry located in the drum 30 and 130 is wet. The control unit measures the amount of laundry, that is, the amount of wet laundry located in the drum 30 and 130 when the fast rotation cycle is activated (S110).

The reason why the amount of wet laundry is measured is because the weight of the dry laundry measured at the initial stage of the wash cycle is different from the amount of wet laundry containing moisture. The measured amount of wet laundry can be used as a parameter configured to determine an acceptable condition for accelerating the drum or to determine to re-implement the stage of distribution of the laundry after reducing the speed of the drum 30 and 130 based on the imbalance condition in step (S210) passing through the transition region.

According to the control method of the present invention, the amount of wet laundry located in the drum 30 and 130 is measured if the drum rotates at a reduced speed after rotation at a constant speed of about 100-110 rpm, achieved by acceleration for a given period of time . If the rotational speed of the drum decreases, rheostatic braking is used. Specifically, the amount of wet laundry is measured by using the angle of rotation during the acceleration period while accelerating the electric motor 40 and 170a, configured to rotate the drum 30 and 130, the angle of rotation during the acceleration period when the speed of the electric motor 40 and 170a and the applied DC voltage are reduced .

After measuring the amount of wet laundry, the control unit may carry out a laundry unraveling step (S130), configured to uniformly distribute the laundry inside the drum.

In the laundry unraveling step, the laundry located in the drum 30 and 130 is evenly distributed to prevent the laundry from accumulating in a specific area within the drum, which may increase the imbalance. If the imbalance increases, noise and vibration will increase if the rpm of the drum increases. At the stage of unraveling the laundry, the drum is accelerated in a predetermined one direction with a predetermined slope, and the stage is carried out until the revolutions per minute reaches the rotation speed at the stage of measuring the imbalance, which will be described below.

Therefore, the control unit measures the imbalance of the drum (S150).

If the laundry has accumulated in a specific area inside the drum 30 and 130, it is not evenly distributed, the imbalance increases, and noise and vibration will occur when the revolutions per minute of the drum 30 and 130 increase. As a result, the control unit measures the imbalance of the drum and determines whether the drum is accelerating.

When measuring the imbalance, the difference between increasing speeds during rotation of the drum 30 and 130 is used. That is, there is a difference between increasing speeds when rotating the drum from top to bottom along gravity and when rotating it from bottom to top in the opposite direction in accordance with the level of created imbalance. The control unit measures the difference in increasing speeds with a speed sensor, for example, a Hall sensor installed in the electric motor 40 and 170a, to measure the degree of imbalance. If an imbalance is detected, the laundry located inside the drum maintains direct contact with the inner peripheral surface of the drum, without falling from the inner peripheral surface even during rotation of the drum. The case with the drum rotating at approximately 100-110 rpm corresponds to this case.

If the drum is accelerated at high speed, if the measured degree of imbalance of the drum containing a predetermined amount of wet laundry is the initial value of the imbalance or more, vibration and noise of the drum will increase significantly, and it is difficult to increase the speed of the drum. As a result, the control unit can save the initial unbalance value, which provides an increase in speed in accordance with the amount of wet laundry in the form of tabular data. After that, the control unit uses the measured amount of wet laundry and the degree of imbalance in the table and determines whether the speed of the drum is increased. In other words, if the degree of imbalance, measured in accordance with the measured amount of wet laundry, is the initial value of the imbalance or more, it can be determined that the degree of imbalance is too large to increase the speed of the drum, and the above steps of measuring wet laundry, unraveling the laundry and repeating imbalance measurements.

As mentioned above, the repetition of the wet laundry measurement step, the laundry unraveling step, and the unbalance measurement step may continue until the measured degree of unbalance corresponds to a lower value than the initial unbalance value. However, if the laundry machine is in an abnormal condition or the laundry is very tangled inside the drum, the measured degree of imbalance cannot correspond to a lower value than the original value of the imbalance, and the steps can be repeated. As a result, it is preferable that the control unit controls the drum to stop rotation and informs the user that the fast rotation cycle is not completed normally if the drum speed does not increase within a predetermined period of time, for example, more than 20-30 minutes after the start of the fast cycle rotation.

If the degree of imbalance, measured in accordance with the measured amount of wet laundry, is less than the initial degree of imbalance, the condition for increasing the revolutions per minute is satisfied, and the control unit performs the step (S210) of passing through the transition region.

In this document, the transition region is a predetermined rpm range including at least one resonant frequency that produces a resonance in accordance with the system of the laundry machine. When a laundry machine system is defined, the transition region is the only vibration characteristic created in accordance with a specific system. The transition region is variable according to the system of the laundry machine. For example, the transition region includes a range of about 200-350 rpm in a laundry machine.

That is, if the rotation speed of the drum 130 passes through the transition region, a resonance is created in the laundry machine, and strong noise and vibration are generated in the laundry machine. The noise and vibration in the laundry machine will create an unpleasant sensation for the user, and they will prevent the drum speed from increasing. As a result, if the rotational speed of the drum passes through the transition region, the angle of inclination of the acceleration can be accordingly adjusted in the transition region, and noise and vibration can be kept minimal during acceleration of the drum 130.

After the step of passing through the transition region, the control unit performs an acceleration step (S230). When passing through the transition region, the rpm of the drum 130 increases at a relatively high speed to remove water from the laundry. In other words, the rpm of the drum 130 is increased to a predetermined value, and moisture from the laundry inside the drum 130 is removed in the acceleration step (S230). However, the acceleration step increases the RPM of the drum 130 at high speed, and strong noise and vibration will occur in the laundry machine. Especially, noise and vibration can increase in proportion to the degree of imbalance of the drum 130.

As described above, a control method configured to reduce noise and vibration created by passing the drum speed through the transition region and / or through its larger range, in other words, the irregular vibration region, will be described.

This control method includes the step of reducing noise and vibration generated in the rpm range greater than the transition region, that is, the uniform distribution of the laundry. This step can be carried out by rotating the drum at a given angle of inclination of the acceleration for a given time. That is, when the drum rotates with a rotation speed lower than the rotation speed having a predetermined acceleration inclination angle, the laundry inside the drum moves only to achieve a uniform distribution of the laundry, and accordingly, noise and vibration are reduced. In this document, a predetermined acceleration inclination angle is set to be a minimum acceleration inclination angle if the drum speed increases in a rapid rotation cycle.

The minimum tilt angle of acceleration of the drum during the fast rotation cycle can be determined as described below.

As described above, the fast rotation cycle mainly includes a laundry distribution step (S100) and a fast rotation step (S200). If the imbalance degree measured in the unbalance measurement step (S150) is an initial unbalance value or more, the imbalance is too large to increase the speed of the drum. As a result, the wet laundry measurement step, the laundry unraveling step, and the unbalance measurement step are repeated. This can cause a substantially increased working time of the fast rotation cycle and a larger energy consumption, such as energy consumption.

As a result, it is necessary in the laundry distribution step (S100) to minimize the time for repeating the laundry unraveling step and the remaining steps. When the drum speed is increased in the laundry distribution step (S100), for example, in steps S110 and S130, the drum speed can be increased with a relatively large acceleration inclination angle (a ratio of the change in speeds). Due to the expansion in determining the angle of inclination of the acceleration, it is preferable that the speed of the drum in step (S210) of passing through the transition region passes through the transition region for a short time even in step (S200) of fast rotation. In the acceleration step (S230), after the drum speed passes through the transition region, the drum speed increases to a predetermined rpm. If the acceleration angle is increased, the noise and vibration created by increasing the speed of the drum can be increased quite strongly. Therefore, it is preferable that the angle of inclination of the acceleration be reduced if the speed of the drum is increased to predetermined revolutions per minute at the stage of acceleration.

As a result, in accordance with the acceleration inclination angle with increasing drum speed during the fast rotation cycle, it can be said that the acceleration inclination angle at the laundry distribution step and the passage through the transition region is relatively large, and the acceleration inclination angle at the acceleration step is relatively small. Except for regular drum speed, i.e. no change in speed, for example, at the stage of measuring the amount of linen or imbalance, the minimum angle of inclination of the acceleration may be a case of increasing the speed of the drum at the stage of acceleration after passing the speed of the drum through the transition region.

The control method in accordance with this embodiment may include the stage of rotation of the drum with a minimum angle of inclination of the acceleration, while the speed of the drum passes through the transition region, which is carried out at least once. Fig.6 shows the stage of rotation of the drum at a given angle of inclination of the acceleration smaller than the minimum angle of inclination of the acceleration in the transition region (S212). Referring to FIG. 6, the transition region range may be a rpm range of about 200-350 rpm, as described above, or the transition region may increase more rpm calculated by adding a value of approximately 30% of the initial rpm to initial revolutions per minute.

Meanwhile, the drum can rotate at a constant speed during rotation for a given angle of inclination of the acceleration smaller than the minimum angle of inclination of the acceleration. That is, the drum can rotate continuously at given rpm, which are in the transition region. If the drum rotates at constant revolutions per minute, the speed of the drum does not increase, and the laundry inside the drum can move more evenly, thus leading to a uniform distribution of the laundry.

Even when it is determined that the drum speed is in the region of irregular vibration, the drum rotates at an inclination angle smaller than the minimum acceleration inclination angle for a predetermined period of time, as described above. As a result, noise and vibration can be reduced. 7 to 9 show a control method including the step of rotating the drum at a given acceleration inclination angle smaller than the minimum acceleration inclination angle with respect to irregular vibration. Depending on the control method in accordance with this embodiment, the drum may rotate at an angle of inclination less than the minimum angle of inclination of the acceleration, at least either before or during or after the passage of the speed of the drum through the region of irregular vibration. Fig. 7 shows a step of rotating the drum at an inclination angle smaller than the minimum acceleration inclination angle before the drum speed passes through the irregular vibration region (S232). Fig. 8 shows a step of rotating the drum at an inclination angle smaller than the minimum acceleration inclination angle when the drum speed passes through the irregular vibration region (S234). Fig.9 shows the stage of rotation of the drum at an angle less than the minimum angle of inclination of the acceleration after passing the speed of the drum through the region of irregular vibration (S232).

If the drum rotates at an acceleration inclination angle smaller than the minimum acceleration inclination angle for a predetermined period of time, as shown in FIG. 7, the laundry inside the drum is properly distributed, and noise and vibration in the area of irregular vibration can be reduced. Due to expansion, if the drum rotates at constant revolutions per minute, the result of an even distribution of the laundry can be significant. Even when the drum speed passes through an irregular vibration region, the above result can be achieved.

Noise and vibration can increase at the stage of increasing the speed of the drum to a given rpm after passing the speed of the drum through the region of irregular vibration. The stage of rotation of the drum for a given angle of inclination of the acceleration smaller than the minimum angle of inclination of the acceleration (S236) can reduce noise and vibration.

Specialists in the art should understand that various modifications and changes are possible in the present invention without departing from the essence or scope of the present invention. Thus, it is understood that the present invention includes modifications and variations of the present invention, provided that they are included in the scope of the attached claims and their equivalents.

Industrial applicability

The present invention has industrial applicability.

If the fast rotation cycle is carried out in accordance with the control method of the present invention, the noise and vibration generated in the laundry machine can be reduced, and at the same time, the time of the fast rotation cycle can be reduced.

Claims (14)

1. The control method of the machine for processing linen, implementing a fast rotation cycle, and the control method includes the stage on which for a predetermined period of time rotate the drum in the range of revolutions per minute located in the transition region and above, for a given angle of inclination of the acceleration, smaller than the preset minimum angle of inclination of increasing the speed of the drum of the cycle of rapid rotation. 2. The control method according to claim 1, according to which the rotation speed of the drum is increased in accordance with the minimum angle of inclination of the acceleration of the drum at the stage of acceleration of the stage of rapid rotation after it passes through the transition region. 3. The control method according to claim 1, further comprising the step of rotating the drum for a predetermined period of time at a predetermined acceleration inclination angle less than the minimum inclination angle of the drum rotation speed increase of the fast rotation cycle when the drum speed is in the transition region. 4. The control method according to claim 3, according to which an additional step is performed where the drum is rotated at constant revolutions per minute for a predetermined period of time when the speed of the drum is in the transition region. 5. The control method according to claim 1, according to which the transition region is expanded in excess of revolutions per minute, calculated by adding a value of approximately 30% of the initial revolutions per minute to the initial revolutions per minute. 6. The control method according to claim 1, whereby the transition region is a range of 200-350 rpm 7. The control method according to claim 3, whereby the laundry machine includes a drive unit comprising a shaft connected to the drum, a bearing housing for rotatably supporting the shaft, and an electric motor for rotating the shaft, and the suspension unit is connected to the drive unit. 8. The control method according to claim 3, in which the machine for processing linen includes a rear gasket for sealing in order to prevent leakage of washing water from the gap between the drive unit and the tank and to ensure the movement of the drive unit relative to the tank. 9. The control method according to claim 3, according to which the tank is supported more rigidly than the drum supported by the suspension unit. 10. The control method according to claim 1, whereby an additional step is carried out in which the drum is rotated for a given angle of inclination of the acceleration less than the minimum angle of inclination of the increase in speed of the drum in the case of a fast rotation cycle for a given period of time, at least or up to either during or after the passage of drum speed through an area of irregular vibration. 11. The control method according to claim 10, according to which an additional step is performed where the drum is rotated at constant revolutions per minute for a predetermined period of time, at least either before, or during, or after the drum speed passes through the region of irregular vibration . 12. The control method of claim 10, wherein the laundry machine comprises a drive assembly comprising a shaft connected to the drum, a bearing housing for rotatably supporting the shaft, and an electric motor for rotating the shaft, and the suspension assembly is connected to the drive assembly. 13. The control method of claim 10, wherein the laundry machine includes a rear gasket for sealing to prevent leakage of washing water from the gap between the drive assembly and the tub and to allow the drive assembly to move relative to the tub. 14. The control method according to claim 10, according to which the tank is supported more rigidly than the drum supported by the suspension unit.

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