KR20080088176A - Washing machine and control method - Google Patents

Abstract

A washing machine and a method for controlling the same are provided to improve washing effect by aerosolizing water using an aerosolizing nozzle and injecting the aerosolized water into a washing tub regularly. A washing machine comprises a water tub(30), a washing tub(40), a drive unit(50), a shower unit(60), and a controller. The shower unit has an aerosolizing nozzle(62) which aerosolizes water and injects the aerosolized water into the washing tub. The controller operates the shower unit in an acceleration period and a deceleration period of dehydration.

Description

Washing machine and its control method {WASHING MACHINE AND CONTROL METHOD THEREOF}

1 is a perspective view of a washing machine according to an embodiment of the present invention.

2 is a cross-sectional view of the washing machine of FIG.

3 is a graph illustrating a rotation speed of a washing tank according to the dehydration process of the washing machine of FIG. 1.

4 is a flow chart showing the progress of the dehydration process of the washing machine of FIG.

* Explanation of symbols on the main parts of the drawings

10: washing machine 20: housing

30: water tank 40: washing tank

50: drive device 60: shower device

62: mist nozzle

The present invention relates to a washing machine and a washing method, and more particularly, to a washing machine and a washing method capable of maintaining a washing effect while reducing the amount of washing water by supplying washing water through a shower nozzle during a dehydration process.

The washing machine is a device for washing laundry by rotating a washing tank or a pulsator while stirring laundry in a washing tank and stirring the laundry and the washing water. Such a washing machine typically performs a washing operation in which a laundry is immersed in a washing water in which detergent is added, a rinsing stroke for rinsing the laundry with clear water, and a dehydration stroke for removing moisture from the laundry.

Some of these washing machines include a shower device that sprays water into the washing tank. The shower device is to reduce the amount of washing water used by spraying the washing water from the top of the washing tank.

By the way, such a conventional washing machine was able to reduce the amount of washing water used by using a shower device, but in order to prevent splashing of the washing water sprayed from the shower device, the washing tank rotates at a low speed after the dehydration stroke is completed. The administration proceeded. Therefore, due to the centrifugal force during the dehydration process, the laundry is attached to the wall of the washing tank, and thus the washing water is not evenly sprayed on the laundry.

Accordingly, an object of the present invention is to solve the problems of the prior art, by washing the washing water evenly during the course of dehydration, washing machine that can maintain the washing effect while reducing the amount of washing water used for rinsing and its control method To provide.

The object of the present invention is a laundry method for washing a laundry while performing a washing stroke, a dehydrating stroke, and a rinsing stroke according to the present invention, wherein the dewatering stroke is a misting nozzle for spraying and washing the washing water. It is achieved by a washing method comprising a shower stroke using.

The dewatering operation may include: a drain section for naturally draining the wash water in a state in which the washing tank for washing the laundry is in progress; an acceleration section for increasing the rotation speed of the washing tank; and maintaining a constant rotation speed of the washing tank. It includes a constant speed section, and a deceleration section to reduce the rotational speed of the washing tank to reach a stop, wherein the shower stroke is preferably made in the acceleration section and the deceleration section.

The shower stroke formed in the acceleration section may be performed when the rotation speed of the washing tank is equal to or less than a set speed.

The shower stroke in the deceleration section is preferably made within a set time after the stop section starts.

In addition, the above object, the water tank provided in the housing according to the present invention; A washing tank installed in the tank; A rotating motor for transmitting rotational force to the washing tank; A shower nozzle for spraying the nebulized washing water into the washing tank; And a controller for operating the shower nozzle in an acceleration section for increasing the rotational speed of the washing tank during a dehydration stroke and for reducing the rotational speed of the washing tank and reaching a stop. Is achieved.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a washing machine according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the washing machine of FIG.

As shown in these drawings, the washing machine according to an embodiment of the present invention, the housing 20 forming the appearance of the washing machine 10, the water tank 30 provided in the housing 20, the water tank 30 It operates the washing tank 40 provided in the inside, the drive device 50 provided with the rotating motor 52 which rotates the washing tank 40, the shower device 60 provided with the mist nozzle 62, and the shower device 60. It includes a controller (not shown).

The housing 20 forms the exterior of the washing machine 10. A door 22, which is a passage through which laundry is entered, is formed at the upper end of the housing 20 so as to be openable and openable. The operation unit 26 having the operation button 25 is provided on the upper front side of the housing 20 so that the user can operate the washing machine 10. When the user selects the washing course, etc. by the operation button 25, the washing machine 10 is operated based on the washing course selected from the controller (not shown) provided in the housing 20.

The water tank 30 is a space in which the wash water is provided in the housing 20. The water tank 30 is coupled to the housing 20 by a suspension device 28. The lower portion of the water tank 30 is provided with a driving device 50 for generating and transmitting a driving force and a drainage device 29 for discharging the contaminated washing water. In the upper portion of the water tank 30 is provided with a shower device 60 for misting, dispersing and discharging the wash water into the water tank (30).

The washing tub 40 is provided in a cylindrical shape in the water tank 30 and is a space where laundry is accommodated and washing is substantially performed. The washing tank 40 is made of stainless steel or the like in which the washing water is in direct contact with the rust. The washing tank 40 is provided with a pulsator 44 which is connected to the driving device 50 and rotates. The washing tank 40 is rotated clockwise or counterclockwise by receiving rotational force from the driving device 50. Carry out the laundry.

The driving device 50 is provided at the lower end of the washing tank (40). The driving device 50 includes a rotary motor 52 and a power transmission device 54. The rotational force generated by the rotary motor 52 is transmitted to the pulsator 44 or the washing tank 40 through the power transmission device 54.

The shower device 60 is provided at the top of the water tank 30 and is fixed to the housing 20. The shower device 60 receives the wash water from the water supply device 24. The mist nozzle 62 provided in the shower device 60 is provided with a smaller nozzle diameter than the normal shower device 60. Accordingly, the wash water supplied through the water supply device 24 is converted into the atomized water particles in the form of particulates through the shower device 60 and sprayed into the washing tank 40. Washing water passing through the mist nozzle 62 having a small nozzle diameter is scattered to the front surface of the washing tank 40 so as to uniformly wet the laundry as a whole, washing water is sprayed evenly without splashing because the nozzle diameter is smaller. Since there is no fear of washing water, the shower tub 40 can be operated without being limited to the case where the washing tub 40 rotates at a low speed.

The controller (not shown) is provided inside the housing 20. The user selects a specific washing course or the like through the operation unit 26, or information input through a sensor (not shown) mounted in the washing machine 10 is input to a controller (not shown). The controller (not shown) generates a control signal for controlling the operation of the drive device 50 including the rotation motor 52 based on the input information and the program input at the production stage.

By such a configuration, the flow of the washing operation of the washing machine of Figure 3 and Figure 1 which is a graph showing the rotation speed of the washing tank according to the progress of the dehydration operation of the washing machine of Figure 1 the action of the washing machine according to an embodiment of the present invention A description will be given based on the chart of FIG. 4.

If the washing proceeds to enter the dehydration administration, the drainage for the wash water is made (S10). Washing water drainage step (S10) proceeds in the drainage section (A) where the washing tank (40 in Figure 2) is stopped. The washing tank 40 in FIG. 2 is drained by the natural drainage in the stopped state.

When the natural drainage for the wash water not absorbed in the laundry, the washing tank is accelerated by the rotary motor (S20). A controller (not shown) generates a control signal to the driving device 50 so that the washing tank 40 of FIG. 2 gradually rotates at a speed.

 When entering the acceleration section (B), the shower is operated (S22). When the shower device is operated (S22), the washing water is misted into very small water particles and is evenly sprayed throughout the washing tank (40 in FIG. 2). Since the washing water is sprayed with small water particles, the washing water is sprayed uniformly throughout the laundry. Since the washing water is sprayed uniformly throughout the laundry, the possibility of washing water is reduced, and the washing tank (40 in FIG. 2) is not limited to rotating at a low speed of about 30 rpm. It is operated (S22). When the shower device is operated in the acceleration section B (S22), the contaminated washing water is dehydrated at the same time as the new washing water is supplied, and contaminated washing water is effectively discharged only by supplying a relatively small amount of washing water. In addition, since the shower administration proceeds at the same time as the dehydration administration proceeds, the shower administration proceeds in the state in which the shower administration proceeds in the state where the laundry is attached to the wall of the washing tank (40 in FIG. 2) after the end of the dehydration administration, so that the washing water does not evenly reach. The washing effect is excellent compared to the case where the effect was low.

Comparing the washing tank rotation speed (V) with the set speed (S24), if the washing tank rotation speed (V) is greater than or equal to the set speed, the operation of the shower device is stopped (S26). Although the washing water is misted and sprayed, the sprayed water is splashed when it is rotated at a high speed around 700rpm, so that the washing machine stops operating when the washing tank rotation speed (V) exceeds a predetermined section.

While maintaining the rotational speed of the washing tank proceeds to dehydration administration (S30). In the constant velocity section (C), full-scale dehydration takes place and the washing water is discharged from the laundry.

It is determined whether dehydration for the laundry is completed (S32), and when the dehydration for the laundry is completed, the washing tank rotating motor is stopped (S34). Even when the washing tank rotating motor stops, the washing tank (40 in FIG. 2) continues to rotate for a predetermined time due to inertia.

While the washing tank (40 of FIG. 2) rotates the inertia operates the shower (S40). When the shower device is operated in a deceleration section (D) in which the inertia rotates and the speed gradually decreases, contaminated washing water is effectively discharged because new washing water is supplied at the same time while dehydration of the laundry proceeds.

It is determined whether the set time has been reached (S42). When the preset time and the time after the stop of the rotation motor are compared with each other and the set time is exceeded, the operation of the shower device is stopped (S44).

Conventionally, a total of 140 liters of washing water was consumed by performing two rinsing strokes of 70 liters at a time, but the present invention performs four shower strokes and one rinsing stroke two times in a dehydrating stroke of five liters at a time. Consumes a total of 90 liters of wash water. Therefore, it is possible to save the wash water by using about 64% of the conventional wash water.

Further, in the electrical conductivity measurement showing the effect of the rinsing stroke, when performing the conventional two rinsing strokes, 1.074 was shown, but in the case of the present invention, 1.069 was shown, showing an equivalent effect. In detail, when the detergent is dissolved in the wash water, the wash water is electrically conductive due to the dissolved detergent. Therefore, the effect of washing can be measured by measuring the electrical conductivity of the wash water remaining in the laundry which has been washed. In the case of pure water, the electrical conductivity is close to zero, so the lower the electrical conductivity, the higher the effect of washing.

As described above, although the present invention consumes a small amount of washing water compared with the related art, the present invention shows an equivalent level of electrical conductivity as compared with the conventional art, which supports the excellent effects inherent to the present invention.

In the above-described embodiment, a case in which the shower stroke is performed in the acceleration section and the deceleration section has been described, but the execution of the shower stroke is not limited thereto and may be variously applied throughout the whole process of washing.

As described above, the present invention is not limited to the described embodiments, and various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

As described in detail above, the washing machine according to the present invention can maintain the washing effect while reducing the amount of washing water used at the time of rinsing by spraying the washing water evenly during the dehydration process.

Claims (5)

In the control method of the washing machine to perform the laundry administration, dehydration administration, and rinsing administration and washing the laundry, The dehydration stroke, A control method for a washing machine, comprising a shower stroke using a shower device having a mist nozzle for misting and spraying washing water. The method of claim 1, The dehydration stroke, A drain section for naturally draining the wash water in a state in which the washing tank for washing the laundry is stopped, an acceleration section for increasing the rotation speed of the washing tank, a constant velocity section for maintaining a constant rotation speed of the washing tank, and Reducing the rotation speed of the washing tank and includes a deceleration section leading to stop, The shower stroke, The control method of the washing machine, characterized in that made in the acceleration section and the deceleration section. The method of claim 2, The shower stroke made in the acceleration section, The control method of the washing machine, characterized in that when the rotational speed of the washing tank is less than the set speed. The method of claim 2, The shower stroke made in the deceleration section, The control method of the washing machine characterized in that the case is made within a set time after the deceleration section is started. A water tank provided inside the housing; A washing tank installed in the tank; A driving device provided with a rotating motor for rotating the washing tank; A shower device provided with a mist nozzle for spraying the mist of washing water into the washing tank; And And a controller for operating the shower device in an acceleration section for increasing the rotational speed of the washing tank during a dehydration stroke and for reducing the rotational speed of the washing tank and reaching a stop.

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