KR101603107B1 - washing machine and controlling method of washing machine - Google Patents

Abstract

The present invention relates to a washing machine and a control method for the washing machine, and more particularly, to a washing machine and a washing machine, which are provided with a first water supply step for supplying washing water to the tub while rotating the laundry so as not to be separated from the inner wall of the drum. A circulation step of circulating the supplied washing water; A sensing step of sensing a change in the level of the wash water as the wash water is circulated; And a rinsing step of determining an additional wash water supply and performing rinsing in accordance with the change in the water level of the wash water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a washing machine and a control method of the washing machine, and more particularly, to a control method of a washing machine capable of reducing the working time while improving the rinsing performance of the washing machine.

Generally, the washing machine removes various pollutants adhered to clothes, bedding, etc. by using the emulsifying action of the detergent, the friction action of the water stream due to the rotation of the pulsator or the drum, and the impact acting on the laundry. In the automatic laundry washing machine recently introduced, a series of strokes leading to a washing course, a rinsing course, a dehydrating course and the like are automatically carried out without user's manipulation in the middle.

In recent years, there is a tendency to increase the overall height as compared with a pulsator washing apparatus that rotates in a state where the washing tub is erected, and there is an increasing demand for a drum type laundry apparatus in which the laundry is twisted and the problem of wrinkling of the laundry hardly occurs. .

The drum type washing machine as described above may be briefly described. The drum type washing machine may include a main body cabinet for forming an outer shape, a tub positioned inside the main cabinet and supported by a damper and a spring for storing wash water, The drum is largely divided into a cylindrical drum into which a laundry can be inserted, and the drum receives driving force by a driving unit for washing laundry laid in the drum.

The drum type washing machine having the above-described structure necessarily causes vibration when the drum is rotated to wash and dehydrate the laundry loaded in the drum due to the rotational force of the drum and the eccentricity of the laundry, Is transmitted to the outside through the tub and the cabinet.

In order to prevent the vibration transmitted from the drum to the tub to be transmitted to the cabinet, a spring and a damper are required between the tub and the cabinet to buffer and mitigate the vibration of the tub.

In the meantime, in the case of the drum type washing machine as described above, most of the laundry is not separately installed but installed in an existing installation environment (for example, a sink environment or a built-in environment). Therefore, in the case of the drum type washing machine, the size should be limited to the installation environment in which it is installed.

As described above, in the case of the drum type washing machine, it is limited to change the internal structure by the spring and the damper structure for relieving vibration between the tub and the cabinet. Since the installation environment of the washing machine is limited, Changing the size is limited.

Meanwhile, in recent years, a lot of research and development are under way to increase the washing capacity of the washing machine in order to increase the amount of washing and convenience of the user. However, it is difficult to increase the size of the tub to increase the washing capacity in the structure of the conventional drum type washing machine due to the above-mentioned restriction conditions. As described above, in order to increase the washing capacity, various washing machines have been developed.

On the other hand, the above-described washing machine removes contamination or the like when the laundry is washed, rinsed, or dewatered. In the case of the rinsing cycle, a rinsing cycle is performed in which washing water for rinsing necessary for the rinsing cycle is repeatedly supplied a predetermined amount and the drum is rotated to remove detergent or the like of the laundry.

In order to uniformly distribute laundry, it is necessary to repeatedly rotate the drum to uniformly distribute the laundry, and a relatively large amount of washing water for rinsing is consumed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to increase the capacity of the washing machine by changing the structure of the washing machine, and to selectively rinse the laundry while sensing the amount of washing water during the rinsing cycle And a control method of the washing apparatus.

According to another aspect of the present invention, there is provided a control method for a washing machine, comprising: a first water supplying step of supplying washing water to the tub while rotating laundry so that the laundry is not separated from the inner wall of the drum; A circulation step of circulating the supplied washing water; A sensing step of sensing a change in the level of the wash water as the wash water is circulated; And a rinsing step of determining an additional supply of washing water according to a change in the level of the washing water and performing a rinsing operation.

The washing water supplied in the first water supplying step may be supplied at a height equal to or less than a height corresponding to the interval between the tub and the drum.

In the first water supplying step, the rotational speed of the drum is preferably a minimum speed at which the laundry is not dropped off from the inner wall of the drum.

The rinsing step may further include a second water supplying step of supplying additional washing water when the change in the water level of the washing water is not more than a predetermined variation amount.

The rinsing step may include a tumbling rinsing step of rumbling the laundry by rotating the drum at a reduced speed after the second water supplying step.

The rinsing step may include a circulation stop step of stopping the circulation of the wash water when the change in the water level of the wash water is equal to or less than a predetermined change amount.

And a display step of indicating that the circulation of the washing water is stopped.

The rinsing step may include a permeate rinsing step of performing rinsing by washing water circulated without supplying additional washing water when the change in the level of the washing water is equal to or greater than a predetermined variation amount.

The permeate rinse step preferably accelerates the rotational speed of the drum.

According to an aspect of the present invention, there is provided a washing machine comprising: a cabinet forming an outer shape; a tub secured to the inside of the cabinet and having a water level sensor for sensing a water supply amount; And a suspension assembly for cushioning and supporting the bearing housing, wherein the suspension assembly includes: a tubular member having a tubular shape and a tubular shape; And a control unit for judging whether or not the circulation has occurred and proceeding the rinsing cycle.

The control unit may determine whether the wash water is circulated according to a detection signal of the water level sensor.

Preferably, the controller performs a permeate rinse cycle when a change in the wash water circulation is detected by the water level sensor.

Preferably, the controller performs a tumbling rinsing cycle when the amount of change in washing water circulation is not detected in the level sensor.

According to the washing machine and the controlling method of the washing machine according to the present invention, it is possible to increase the capacity of the washing machine by changing the structure of the washing machine, and in the case of performing the rinsing cycle, Can be increased.

Hereinafter, a method of controlling a washing machine and a washing machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In describing the present invention, the names of the individual components to be defined are defined in consideration of the functions of the present invention. Therefore, the present invention should not be construed as limiting the technical elements of the present invention. Further, the respective names defined for each component may be referred to by other names in the art.

First, a washing machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the washing machine 100 according to the present invention includes a cabinet 110, a tub 120 fixedly installed in the cabinet 110, A rotary shaft 150 connected to the drum 140 through a rear portion of the tub 120 and a bearing housing 160 supporting the rotary shaft 150. The drum 140 is rotatably installed inside the tub 120, A driving motor 170 provided in the bearing housing 160 to transmit a rotational force to the rotating shaft 150 and a driving motor 170 coupled to the bearing housing 160 to support structures connected to the bearing housing 160, A suspension assembly 180 for cushioning an impact, and a control unit 190 for controlling the operation of the washing machine 100 in conjunction with each component and performing a predetermined washing cycle.

The cabinet 110 includes a base 111 on which respective components are supported and seated and a front panel 112 on which an opening 112a is formed for inputting laundry, and further includes a left / right panel 113 (not shown) A rear panel 115 and a top panel 116. [ The door 112b for closing the opening 112a and the respective components of the washing machine 100 may be controlled in the opening 112a of the front shield panel 112 or the operating state of the washing machine 100 may be displayed A control panel 117 is provided.

The control panel 117 is provided on the upper side of the front panel 112 and includes an operation unit 118 for controlling the operation of the washing machine 100 and a display unit 119 for displaying the operating state of the washing machine 100. The operation unit 118 and the display unit 119 are connected to the control unit 190 to control the operation of the washing machine 100 or to display the operating state of the washing machine 100. [

The tub 120 is fixed to the inside of the cabinet 110 by a separate joint (for example, a screw thread, a bolt, and the like). For example, by unshown assemblies and support members on the front panel 112 and the rear panel 115 or the left / right panel 113 (not shown) of the cabinet 110.

The tub 120 is connected to the door 112b at a front side thereof to form an inlet 121 through which laundry can be introduced. The inlet 121 has a front gasket 122 for maintaining airtightness with the opening 112a formed in the front panel 112. [

The front gasket 122 is formed with an injection nozzle 123 for diffusing the wash water discharged through the water supply hose 127 and the circulation hose 135 to be described later into the drum 140. The washing water supplied when the washing water is supplied by the spray nozzle is widely diffused into the drum so that the washing object in the drum 140 can be supplied with the washing water evenly regardless of whether the drum 140 is rotated or not.

A tub back bell 124 is provided at a rear side of the tub 120 to receive a rotation shaft 150. The tub back bell 124 is provided at a rear side of the tub 120 to be movable by a ring- . The vibration of the drum 140 is prevented from being transmitted to the tub by the tub backwet 124 and the rear gasket 125.

A water supply unit 126 for supplying wash water to the inside of the tub 120 is provided at an upper side of the tub 120. The water supplied to the tub 120 is drained to the lower side of the tub 120, And a water level sensor (not shown) for detecting the amount of washing water in the tub. The water level sensor 137 senses the amount of the washing water supplied to the tub 120 during a washing process such as washing and rinsing and transfers the detected amount to the controller 190. In particular, And transmits it to the control unit 190.

The water supply unit 126 includes a water supply hose 127 for supplying water from the external water source to the inside of the tub 120, a water supply valve 128 provided on the water supply hose 127 to control the water flow in and out, A detergent supply device 129 in which water supplied through the detergent supply device 127 is introduced into the tub 120 together with the detergent and water and / And a supply hose 131 supplied to the inside of the supply hose 131.

The drainage section 132 includes a drainage hose 134 for draining washing water in the tub 120, a drainage pump 133 for moving wash water passed through the drainage hose, A circulation hose 135 for circulating the washing water back to the inside of the tub 120 and a flow valve 136 for determining the path of washing water moved by the drain pump 133 are installed.

The drum 140 is rotatably disposed inside the tub 120, and the rotation shaft 150 is coupled to the rear end of the drum 140. And a lift 141 for moving the laundry is provided on the inner surface of the drum 140. In addition, the front and / or rear surfaces of the drum 140 are provided with a weight balancer 142 for balancing to suppress the vibration of the drum 140 during dewatering.

The bearing housing 160 is coupled to the tub bobbin 124 located on the rear side of the tub 120. The rotation shaft 150 coupled to the drum 140 penetrates the inside of the bearing housing 160. The bearing housing 160 is provided with a bearing (not shown) for smoothly rotating the rotary shaft 150 and the rotary shaft 150 is supported by a bearing (not shown).

The drive motor 170 is assembled to the rear surface of the bearing housing 160 to rotate the rotation shaft 150. The driving motor 170 is provided so that its speed can be controlled by a control unit 190 which is not shown. The structure and type of the drive motor 170 are widely known to those skilled in the art and various embodiments are possible, and a detailed description thereof will be omitted.

The suspension assembly 180 includes a damper bracket 181 coupled to the bearing housing 160 and a damper portion 184 coupled to the damper bracket 181 to mitigate vibration and shock transmitted to the damper bracket 181 .

The damper bracket 181 is coupled to the bearing housing 160 and includes a pair of vertical brackets 182 extending downward from the outer side of the bearing housing 160 and a pair of vertical brackets 182 coupled to the ends of the vertical brackets 182, 120 extending in the forward direction. Here, the pair of vertical brackets 182 and the horizontal brackets 183 are preferably formed symmetrically with respect to the center of the bearing housing 160 as a reference line.

The damper portion 184 is provided between the base 111 and each horizontal bracket 183 to support the horizontal bracket 183. The damper unit 184 includes a spring damper 185 that supports the horizontal bracket 183 and attenuates and absorbs displacement in the vertical direction and an oil damper 185 that attenuates the horizontal displacement applied by the horizontal bracket 183 186).

The spring damper 185 is provided between the base 111 and the end of the horizontal bracket 183 in the vertical direction and further disposed between the bearing housing 160 and the base 111, . The drum 140 is floated on the inner side of the tub 120 by the spring damper 185 so that the vibration in the vertical direction generated when the drum 140 rotates is buffered and attenuated.

The oil damper 186 is provided between each central portion of the horizontal bracket 183 and the base 111 and is inclined downward in the direction parallel to the rotational axis of the drum 140. The oil damper 186 attenuates vibration in the horizontal direction that occurs when the drum 140 rotates.

The control unit 190 controls the operation of the washing machine 100 as a whole (for example, a washing cycle, a rinsing cycle, a dewatering cycle) and operates the washing machine 100 according to the setting of the washing machine 100 . In particular, the control unit 190 selectively performs the rinsing cycle according to the variation amount signal of the wash water in the tub 120 sensed by the water level sensor 137 during the rinsing stroke.

In addition, the washing machine having the above-described structure may further include a steam supply device, a hot air supply device, and the like. The steam supply device and the hot air supply device may further perform drying and regeneration (refresh) .

Hereinafter, the operation of the washing machine will be described in detail with reference to the accompanying drawings. The constituent elements and reference numerals described below will be understood with reference to the above-described drawings and description.

The control method of the washing machine according to the present embodiment is for a rinsing stroke which can be included during the entire stroke of the washing machine or a rinsing stroke which can be performed independently from other courses. Therefore, the description of the washing, dehydrating, and the like will be brief, since the point of the present invention may be blurred.

In addition, the washing machine 100 according to the present invention can generally perform a washing cycle, a rinsing cycle, and a dewatering cycle, and the drying and washing machine may further include a drying cycle following the dewatering cycle.

In the washing cycle, water is initially supplied to the drum 140 to rotate the drum 140 repeatedly in the forward or reverse direction to perform washing. In the rinsing cycle, laundry is dewatered, water is supplied, and the drum 140 is rotated. In the dehydrating step, the drum 140 is rotated at a high speed to remove water from the object to be cleaned.

Hereinafter, a method of controlling the rinsing cycle of the washing machine according to the present invention will be described in detail with reference to FIGS.

Before performing the rinsing cycle according to the present invention, a process of dewatering the laundry and draining the washing water in the tub 120 may be performed. At this time, the drum 140 maintains a state in which the laundry stored in the drum 140 is rotated at a minimum speed capable of maintaining the state of being attached to the inner wall of the drum 140. In the embodiment, the minimum speed rotational speed of the drum 140 may be reduced to rotate at 100 to 110 rpm to perform the drainage.

Further, a process of dewatering the washing water contained in the laundry after the drainage of the washing water can be further performed. This is because it is preferable to first remove the moisture and residues (such as foreign substances or residual detergent) of the laundry prior to performing the rinse cycle, since the rinse cycle is typically performed following the washing cycle in the course of the washing machine. At this time, the dewatering rotation speed of the drum 140 can be appropriately adjusted according to the capacity of the washing machine 100, the amount of laundry, and the like, but it can proceed at a rotation speed of, for example, about 700 to 900 rpm

On the other hand, the washing water for rinsing is supplied to perform the rinsing process. At this time, the drum 140 is rotated at a speed higher than the minimum speed at which the laundry in the drum 140 can be maintained attached to the inner wall of the drum 140, (Step S100).

In this case, the rotational speed of the drum 140 is controlled so that the rotational speed of the drum 140 is reduced at the rotational speed of the drum 140 during the dehydration stroke, Rotate at 110 rpm. This is because, when the laundry falls off from the inner circumferential surface of the drum 140 and drops, the laundry must be uniformly dispersed in the course of the rinsing step, which will be described later.

Thereafter, the flow path valve 136 is switched to the circulation hose 135 side and the drain pump 133 is operated to circulate the wash water in order to circulate the wash water supplied to the tub 120 to perform the rinsing cycle of the laundry (Step S110).

The washing water is supplied through the drain pump 133, the flow path valve 136 and the circulating hose 135 and is supplied to the drum 140 by the spray nozzle 123 formed in the front gasket 122 of the tub 120. [ And is supplied to the inside of the fuel tank. Thus, even if the laundry is kept attached to the inner wall of the rotating drum 140, the laundry can be evenly sprayed.

At this time, the water level sensor 137 provided in the tub 120 senses the level of the washing water remaining in the tub 120 (step S100). Here, the washing rinse cycle is selected according to the detected water level.

That is, as the wash water circulates, the wash water level of the tub 120 detected by the water level sensor 137 changes, indicating that the wash water is circulating properly. In this case, a permeate rinse cycle (step S150) will be described in detail later.

On the other hand, when the washing water level of the tub detected by the water level sensor 137 does not change despite the circulation of the washing water, the washing water is not circulated correctly. In this case, additional water supply is performed to perform a normal tumbling rinse cycle (step S190).

More specifically, the controller 190 senses a change in the water level in the tub 120 from the water level sensor 137, and determines whether the water level change in the tub 120 is a predetermined change amount (a change amount that changes as the wash water circulates) (Step S130).

At this time, if the level of the tub 120 sensed by the water level sensor 137 is included in the predetermined range, the controller 190 keeps the circulation of the washing water by the drainage unit 132 (step S140).

 In addition, the controller 190 controls the driving motor 170 to control the rotational speed of the drum 140. In this case, the rotational speed of the drum 140 is higher than the rotational speed at which the laundry is attached to the inner wall of the drum 140, and preferably, it is rotated at 350 to 450 rpm.

The washing water circulated by the drainage unit 132 is uniformly sprayed to the inside of the drum 140 by the front gasket 122, and the laundry is uniformly sprayed on the laundry. At the same time, the washing water is drained by the centrifugal force due to the rotating speed of the drum 140, and the permeating step is performed (step S150).

Meanwhile, in the process of detecting a change in the water level in the tub 120 by the water level sensor 137, a preset change amount of the water level change in the tub 120 (change amount as the wash water circulates) It may not be possible.

Such a phenomenon may occur when a problem occurs in a system (for example, the drain pump 133 or the like) circulating the washing water, or the circulation hose 135 is clogged. In such a case, if the permeate rinse cycle is performed, the rinse can not be thoroughly performed, and a catastrophic failure may occur in the washing water circulation system.

If the predetermined level of change in the water level in the tub 120 is not generated by the water level sensor 137, the control unit 190 stops the operation for circulating the wash water preferentially (step S160).

The control unit 190 notifies the user of the occurrence of a change in the rinsing cycle through the display unit provided on the control panel of the washing machine 100 and simultaneously displays the circulation system (for example, the drain pump 133, Hose 135, etc.) is visually displayed (step S170). In addition, it may be possible to audibly inform the user through a speaker or the like not shown together with a visual indication.

On the other hand, the controller 190 supplies additional washing water in order to proceed rinsing the laundry (step S180). At this time, the supplied washing water is supplied to a degree that the laundry stored in the drum 140 can be sufficiently locked, and the rotational speed of the drum 140 can be adjusted. That is, when the wash water is additionally supplied, the drum 140 may be continuously rotated to improve the rinsing efficiency.

When the additional water supply of the washing water is completed, the control unit 190 controls the rotation of the drum 140 in the forward / reverse direction and adjusts the rotational speed of the drum 140 to perform rubbing of tumbling (step S190) .

In the above description, the rinsing process has been described in the case where the entire process including the washing process, the washing process, the rinsing process, and the dewatering process is performed. However, the present invention is not limited thereto, For example, the present invention can be applied to a case where only rinsing is performed. That is, in the case where only the rinsing cycle is performed, the washing water is not supplied to the inside of the tub 120, so that the water rinsing can be performed first and then the water rinsing cycle or the tumbling cycle can be selected. The detailed description of each step is similar to the description of the above-described embodiment, so repetitive description will be omitted.

Further, in the present invention, it is determined whether or not the progress of the rushing process is progressed through the detection signal of the water level sensor 137. Alternatively, the rinsing process may be performed by using a flow meter of a circulating hose, It is also possible to judge the failure of the circulation system of the water and perform the rinsing stroke.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, The present invention may be modified in various ways. Therefore, modifications of the embodiments of the present invention will not depart from the scope of the present invention.

1 is a perspective view schematically showing a washing machine according to the present invention.

2 is a side view showing the structure of a washing machine according to the present invention.

3 is a block diagram showing a configuration of a washing machine according to the present invention.

4 is a flowchart showing a control method of the washing machine according to the present invention.

FIG. 5 is a graph showing an operating relationship of the washing apparatus according to the present invention.

Claims (13)

A first water supply step of supplying washing water to the tub while rotating the laundry so that the laundry is not separated from the inner wall of the drum; A circulation step of circulating the supplied washing water; A sensing step of sensing that the wash water is circulated according to a change in the level of the wash water; And a rinsing step of determining an additional wash water supply and performing rinsing in accordance with a change in the water level of the wash water, In the rinsing step A second water supplying step of supplying additional washing water when the water level change of the washing water is equal to or less than a predetermined variation amount, and a tumbling rinsing step of rubbing the laundry by tumbling, Wherein when the change in the water level of the washing water is equal to or greater than a predetermined change amount, the washing water is circulated and rinsed by accelerating the rotation speed of the drum without supplying additional washing water. The method according to claim 1, wherein the washing water supplied in the first water supplying step is supplied at a height corresponding to a distance between the tub and the drum. delete delete delete The method according to claim 1, wherein the rinsing step includes a circulation stop step of stopping the circulation of the wash water when the change in the level of the wash water is equal to or less than a predetermined change amount. The method according to claim 6, further comprising a display step of indicating that the circulation of the washing water is stopped. delete delete A cabinet forming an external shape, A tub secured to the inside of the cabinet and provided with a water level sensor for sensing a water supply amount, A drum rotatably provided in the tub, A rotary shaft passing through the rear of the tub and connected to the drum, A bearing housing for supporting the rotation shaft, A drive motor for transmitting a rotational force to the rotation shaft, And a suspension assembly coupled to the bearing housing for buffering and supporting the drum, And a control unit for judging whether or not the washing water is circulated in the rinsing cycle and proceeding to the rinsing cycle. 11. The washing machine according to claim 10, wherein the controller determines whether the wash water is circulated according to a detection signal of the water level sensor. 12. The washing machine as claimed in claim 11, wherein the controller performs a transmission rinsing cycle when a change in the wash water cycle is detected in the level sensor. 12. The washing machine according to claim 11, wherein the controller performs a tumbling rinsing cycle when the amount of change due to the washing water circulation is not detected in the water level sensor.

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