KR100751766B1 - Drum type washing machine - Google Patents

Abstract

The present invention relates to a drum washing machine, and in particular, by allowing the washing water supplied to the tub and the drum to be evenly sprayed throughout the laundry, it is possible to reduce the amount of washing water required during initial water supply to wash the laundry, and to wash the laundry. The present invention relates to a drum washing machine in which washing performance is improved while the washing water is circulated during operation.

The drum washing machine according to the present invention includes a cabinet, a tub, a drum, a driving device, a water supply device, spraying means installed in the water supply device so that washing water is scattered in the tub and drum, a drainage device, and A circulation device is installed in the drainage device and the washing water discharged along the drainage device is recovered to the water supply device, and a heater is installed on the inner wall of the tub. The control method of the drum washing machine includes: an initial water supply step; A preheating step of heating the initial amount of the wash water freshened in the tub for a predetermined time, a circulation step of spraying the preheated wash water from the upper part of the tub and the upper part of the drum, a washing water heating step, and a water supply step for washing operation And, it characterized in that the washing step included.

Drum washing machine, spraying means, nozzle, circulator, switching means

Description

Drum Washing Machine {DRUM TYPE WASHING MACHINE}

1 is a cross-sectional view showing the configuration of a drum washing machine according to the prior art,

2 is a cross-sectional view showing the configuration of a drum washing machine according to the present invention;

3 is a cross-sectional view showing a first nozzle of the drum washing machine according to the present invention;

4 is a cross-sectional view showing a second nozzle of the drum washing machine according to the present invention;

5 is a cross-sectional view showing a circulation mode by the switching means of the drum washing machine according to the present invention;

6 is a cross-sectional view showing the drainage mode by the switching means of the drum washing machine according to the present invention;

7 is a block diagram showing the configuration of a drum washing machine according to the present invention;

8 is a flowchart illustrating a control method of a drum washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

10 cabinet 12 door

20: tub 22: seating portion

30 drum 34 lifter

40: drive device 50: water supply device

52: detergent container 54: supply pipe

54a: main building 54b: branch building

56: water supply valve 60: injection means

62: first nozzle 64: second nozzle

70: drainage device 72: discharge pipe

74 pump 80 circulator

82: circulation tube 84: switching means

84a: variable part 84b: door member

84c: motor 90: heater

92 sensor 92a: first temperature sensor

92b: second temperature sensor

The present invention relates to a drum washing machine, and in particular, by allowing the washing water supplied to the tub and the drum to be evenly sprayed throughout the laundry, it is possible to reduce the amount of washing water required during initial water supply to wash the laundry, and to wash the laundry. The present invention relates to a drum washing machine in which washing performance is improved while the washing water is circulated during operation.

In general, the drum washing machine is a device for washing by using a friction between the drum and the laundry rotated by the driving force of the motor in a state in which detergent, washing water and laundry are put in a drum in which the rotating shaft is disposed in a horizontal direction, and there is almost no damage to the laundry. The laundry does not get tangled with each other, and the washing effect is pounding and scrubbing.

1 is a cross-sectional view showing the configuration of a drum washing machine according to the prior art.

The steam jet drum washing machine according to the prior art forms a predetermined space, the front of which is opened, the cabinet (1) having a door, and the tub (2) installed in the cabinet (1) and a predetermined space in which the washing operation is performed. And a buffer device 3 installed between the tub 2 and the cabinet 1 to support the tub 2 so as to be able to flow in a predetermined amount, and rotatably installed inside the tub 2 to wash water and A drum (4) in which laundry is contained, a lift (5) installed to protrude at an interval on the inner wall of the drum (4) to lift and drop the laundry as the drum (4) is rotated, and the tub Water supply for supplying the wash water to the tub (2) and the drum (4) inside the drive device (6) installed to be connected to the drum (4) to the rear of the (2), the upper side of the tub (2) The device 7 and the tub 2 are provided below the tub 2 And the drum 4 drainage 8 of the washing inside the discharge to the outside the cabinet (1), installed on the bottom surface of the tub is constructed contains a heater 9 for heating wash water.

Thus, when the user drives the washing machine after storing the laundry in the drum 4, first, the washing water is supplied to the tub 2 and the drum 4 by the water supply device 7, wherein the washing water is The washing water and the detergent are mixed and flow into the tub 2 while passing through the detergent container 7a installed in the water supply device 7.

At this time, the washing water flowing into the tub is supplied in an amount that allows the laundry to be wet so that the initial water supply is achieved. The washing water is supplied so that the laundry is locked, and the washing water is heated by the heater, thereby washing the laundry. Improved washing performance during operation

When the initial water supply and heating step as described above is completed, the washing water for washing operation is supplied, and when the supply of the washing water is completed, this is detected by the controller, and the power source is supplied to the driving device 6 by an electrical signal transmitted from the controller. Since the drum 4 is rotated so that the washing operation is performed.

However, in the drum washing machine according to the related art, the laundry is locked because the supply pipe of the water supply device 7 is inserted into the front part of the tub 2 so that the washing water flows into only one end of the tub 2 and the drum 4. It is difficult to reduce the washing water required at the initial water supply because the washing can be carried out only when the washing water is supplied to the extent of losing.

In addition, during the washing operation, the laundry which is moved in the vertical direction by the lifter 5 collides with and is contained in the washing water accumulated on the bottom of the drum 4 so that the washing operation is performed. Since it is not possible to reduce the washing water is not easy, there is a problem that it is difficult to reduce the time and energy required for the washing operation due to reduced washing performance.

The present invention has been made in order to solve the above problems of the prior art, by allowing the washing water to be evenly sprayed inside the tub and drum, to reduce the washing water required during the initial water supply and washing operation for the packing of the laundry. Its purpose is to provide a drum washing machine.

In addition, by circulating the washing water sprayed into the tub and the drum is heated in the tub to be sprayed again from the upper side of the tub, the washing performance is improved by washing with hot washing water, and the washing water required during the initial water supply and washing operation And to provide a control method of a drum washing machine to save time is its purpose.

The drum washing machine according to the present invention for solving the above problems forms a predetermined space, the front surface is opened, the cabinet is installed with a door, the door is installed to be able to flow a certain amount, the washing place is formed in a predetermined space A tub, a drum rotatably installed inside the tub, and having a plurality of hole parts formed therein to accommodate laundry, a driving device installed in the tub and connected to the drum, and connected to the tub from the outside of the cabinet to supply laundry water. And a drainage device provided in the water supply device, spraying means installed in the water supply device so that the washing water is scattered in the tub and the drum, a discharge pipe extending from the tub to the outside of the cabinet, and a pump installed in the discharge pipe; Washing water discharged along the drainage system selectively according to the control method installed in the A circulation device for recovering to the upper side of the tub is included, The water supply device comprises a supply pipe connected to the tub from the outside of the cabinet, and a water supply valve installed in the supply pipe, the supply pipe is the front of the tub A main pipe extended to the opening and bent toward the opening of the drum, and a branch pipe branched from the supply pipe and connected to an upper center portion of the tub, wherein the injection means includes a first nozzle installed at an end of the main pipe, and an end of the branch pipe. And a second nozzle provided in the second nozzle, wherein a shaft fixed by a support in the center of the end of the branch pipe extends into the tub, and a reflecting plate having a concave shape is provided at a lower end of the shaft. It features.

In addition, the control method of the drum washing machine according to the present invention, in the control method of the drum washing machine, the water supply valve is opened, the initial water supply step in which the initial amount of the washing water is introduced into the tub and drum, and the washing water contained in the tub A circulation step of spraying the upper part of the tub and the upper part of the drum, a repeating step of the initial water supply step and the circulation step sequentially during the set number of times, and when the repeating step is completed, a water supply valve is opened to wash the amount of washing set for the washing operation. A water supply step in which the water flows into the tub and the drum, and when the water supply step is completed, the drum is rotated by a set program, and the washing step is performed in which the washing water is sprayed from the top of the tub and the drum.

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

2 is a cross-sectional view showing the configuration of a drum washing machine according to the present invention.

Drum washing machine according to the present invention forms a predetermined space, the front is opened, the cabinet 10 is installed with the door 12, the door 12 is installed to be able to flow a certain amount, the laundry is formed in a predetermined space The tub 20, the drum 30 is rotatably installed inside the tub 20, a plurality of holes are formed and the laundry is contained, the tub 20 is installed on the tub 20, the drum 30 The driving device 40 is connected, the water supply device 50 is connected to the tub 20 from the outside of the cabinet 10 to supply the washing water, and the washing water is installed in the water supply device 50 to install the tub 20 and Discharge device consisting of a spray means 60 to be scattered in the drum 30, the discharge pipe 72 extending from the tub 20 to the outside of the cabinet 10 and the pump 74 installed in the discharge pipe 72 70 and selectively installed in accordance with the control method is installed in the drainage device 70 The circulator 80 for allowing the wash water to be recovered to the water supply device 50 and the heater 90 installed on the inner wall of the tub 20 are included.

As a result, when the user opens the door 12 to store the laundry in the drum 30 and drives the washing machine, the washing water is supplied to the tub 20 and the drum 30 along the water supply device 50. Washing water is scattered in the tub 20 and the drum 30 by the spraying means 60 and is evenly sprayed on the laundry, so that the laundry is easily wetted during initial water supply and is circulated even during the washing operation. This results in an effect of improving the washing performance.

Here, since the tub 20 is formed with a recess 22 formed at one side of the bottom surface of the tub 90 so that the heater 90 is installed, when the power is applied to the heater 90 installed at the seat 22, the washing water is heated. The washing of the laundry is made easy by the high temperature washing water, and the washing water is heated to a predetermined temperature or more during the washing operation.

The water supply device 50 includes a supply pipe 54 connected to the tub 20 from the outside of the cabinet 10, and a water supply valve 56 installed at the supply pipe 54. 54 is a main pipe 54a extending to the front of the tub 20 and bent toward the opening of the drum 30, and a branch pipe 54b branched from the supply pipe 54 and connected to an upper center portion of the tub 20. ) Is configured to include.

The injection means 60 includes a first nozzle 62 provided at an end of the main pipe 54a and a second nozzle 64 provided at an end of the branch pipe 54b.

As a result, the water supply valve 56 is opened and the washing water introduced through the supply pipe 54 is dissolved in the detergent while passing through the detergent container 52 and moved into the tub 20 and the drum 30. The wash water flowing along the 54a is injected into the drum 30 through the first nozzle 62, and the wash water flowing along the branch pipe 54b is the tub 20 by the second nozzle 64. Since it is sprayed into the inside of the drum 30 is evenly sprayed on the upper surface of the drum 30, a uniform amount of washing water is introduced into the drum 30 through the entire hole through the hole formed in the drum (30).

Since the discharge nozzle is bent toward the inner wall of the upper surface of the drum as shown in FIG. 3, the first nozzle 62 is sprayed at a constant speed, and the inner wall of the drum 30 is sprayed at the same time. Since it is scattered while colliding with, evenly contacting the laundry contained in the drum (30) is made easy to carry out.

In addition, the second nozzle 64, as shown in Figure 4, the shaft 64b fixed by the support 64a at the center of the end of the branch pipe 54b extends into the tub 20. The concave reflection plate 64c is provided at the lower end of the shaft 64b so that the wash water supplied into the tub 20 along the branch pipe 54b is scattered while colliding with the reflection plate 64c. Since the reflecting plate 64c has a concave shape, it is scattered laterally along the curved surface of the reflecting plate 64c, and is evenly sprayed over the entire drum 30.

When the supply of the washing water is started in the tub 20 and the drum 30, the amount of the washing water is sensed by the flow rate sensor 94, and when the set amount of the washing water is supplied, the water supply device 50 is stopped. After the power is applied to the drive device 40, the washing operation is performed by the set program.

At this time, the wash water is discharged to the bottom surface of the tub 20 and the circulation is supplied to the upper side of the tub 20, the circulator 80 for performing this operation, the supply pipe (1) from one side of the discharge pipe (72) Switching means for selectively circulating the discharge pipe 72 and the circulation pipe 82 is installed between the discharge pipe 72 and the discharge pipe 72 is installed between the discharge pipe 72 and the discharge pipe (72) ( 84, wherein the switching means 84 includes a variable portion 84a to which a portion of the discharge pipe 72 extends into a circular space, to which the circulation pipe 82 is connected, and the variable portion 84a. The door member 84b which is installed rotatably inside and selectively closes the discharge pipe 72 and the circulation pipe 82 according to the rotated angle, and the motor 84c installed on the rotating shaft of the door member 84b It is comprised.

In addition, the drainage device 70 includes a discharge pipe 72 extending from the seating portion 22 of the tub 20 to the outside of the cabinet 10, and a pump 74 installed in the discharge pipe 72.

By the configuration as described above, the washing water is discharged to the lower end of the seating portion 22 during the initial water supply or during the washing operation, and the circulation is made to flow to the upper end of the tub 20. When transmitted, the motor 84c is driven to rotate the door member 84b as shown in FIG. 5, so that the discharge pipe 72 is closed and the circulation pipe 82 is opened to wash the water flowing by the pump 74. The washing water is circulated while the upper portion of the tub 20 flows through the supply pipe 54 along the circulation pipe 82.

By this circulation operation, even if a predetermined amount or less of washing water is supplied at the time of initial water supply, the washing water is circulated for a predetermined time, and the laundry is filled. ), Since the washing water is continuously sprayed from the second nozzle 64, the contact interview between the laundry and the washing water is maximized, and the washing performance is improved.

In addition, when the washing operation is terminated and the drainage is made, when the motor 84c is driven according to a signal transmitted from the controller 100, the door member 84b is rotated as shown in FIG. 6, so that the circulation pipe 82 is closed. Then, the discharge pipe 72 is opened so that the wash water flowing by the pump 74 is discharged to the outside of the cabinet 10 through the discharge pipe 72.

Of course, the circulation pipe 82 of the circulation device 80 may be connected to the supply pipe 54 and a separate nozzle may be installed to extend into the tub 20 and the drum 30.

The heater 90 is disposed at the center of the seating part 22, and a sensor 92 is installed to detect a temperature difference between an upper side water temperature of the heater 90 and a lower side water temperature of the heater 90. By detecting the difference between the upper side temperature and the lower side temperature of 90, when the temperature difference is generated a predetermined temperature or more can be detected that the heater 90 is not sufficiently immersed in the wash water.

Thus, the sensor 92 for measuring the temperature difference between the upper side temperature and the lower side temperature of the heater 90, the first temperature sensor 92a provided on the seating portion 22 and the seating portion 22 Since the second temperature sensor (92b) installed on the bottom is configured to include a predetermined amount of wash water is supplied when the initial water supply is supplied to the heater 90 for a set time, the washing water is heated, after When the temperature difference measured by the first temperature sensor 92a and the second temperature sensor 92b is less than or equal to the set value, it detects that the amount of washing water is suitable for circulating operation, and thus whether the circulator 80 is driven. Judging.

In addition, during the washing operation, it is determined whether the heater 90 is driven by determining whether the water temperature sensed by the sensor 92 is equal to or higher than a set temperature, thereby preventing the heater 90 from being heated more than necessary.

Looking at the operation of the drum washing machine according to the present invention configured as described above are as follows.

8 is a flowchart illustrating a control method of a drum washing machine according to the present invention.

The control method of the drum washing machine according to the present invention includes an initial water supply step (S10) through which the water supply valve 56 is opened and the washing water of the initial amount is introduced into the tub 20 and the drum 30, and the tub 20 Preheating step (S20) for heating the initial amount of fresh water washed in a predetermined time, and the circulation step (S30) for spraying the preheated wash water from the upper portion of the tub 20 and the drum 30, Power supply is applied to the heater (90) heating step (S50) to increase the temperature of the wash water up to the set temperature, and when the washing water is heated above the set temperature in the heating step (S50) the water supply valve 56 is opened Water supply step (S60) is introduced into the tub 20 and the drum 30 in the amount of washing water set for the washing operation, and the drum 30 is rotated by the set program when the water supply step (S60) is completed, The washing water is sprayed from the top of the tub 20 and the drum 30 includes a washing step (S70) Is done.

Here, in the initial water supply step (S10), when the water supply valve 56 is opened (S12) by the user's operation, the washing water is introduced along the supply pipe 54, the seating portion 22 of the tub 20 After the initial amount of the wash water set to a certain amount overflows the water supply (S14), the water supply valve 56 is closed (S16) to form the initial water supply.

After the initial water supply is made, a preheating step S20 is performed in which power is applied for the time set in the heater 90. When the preheating step S20 is completed, the washing water is circulated to the upper side of the tub 20 and sprayed. When the laundry is soaked, the circulation step S30 includes determining whether the temperature difference between the upper water temperature and the lower water temperature of the heater 90 is less than or equal to the set value (S32), and if the temperature difference is less than or equal to the set value. The washing water is circulated to the tub 20 and the drum 30 so as to be sprayed (S34).

Here, in the determining of the temperature difference (S32), as illustrated in FIG. 7, the temperature difference between the temperature measured by the first temperature sensor 92a and the temperature measured by the second temperature sensor 92b is controlled. It is determined by the calculation of (100), and this determination step (S32), the heater 90 is not immersed in the wash water because it determines whether the washing water of sufficient amount so that the heater 90 is immersed in the wash water. It is to prevent overheating of the heater 90 by preventing a malfunction in which power is applied in a non-state.

In addition, when the circulation step (S30) is described in detail, the pump 74 is driven by the signal of the control unit 100 after the preheating step (S20) is completed, at this time, the motor 84c of the switching means 84 As the door member 84b is rotated as shown in FIG. 5 to form a washing water circulation mode while being driven, the washing water located at the lower side of the tub 20 flows along the discharge pipe 72 so that the variable portion 84a is moved. After being flowed into the circulation pipe 82 while passing through the tub 20 and the drum 30 again along the supply pipe 54, the first nozzle 62 is injected into the drum 20 The laundry water impinging on the reflecting plate 64c of the second nozzle 64 is sprayed over the entire drum 30 and flows along a plurality of holes formed in the drum 30, thereby being in contact with the laundry. Is done.

In addition, the initial water supply step (S10), the preheating step (S20), the circulation step (S30) is made of a repetition step (S40) which is sequentially made during the set number of times, the number of repetitions is determined according to the amount of laundry Preferably, since the laundry contained in the drum 30 is sufficiently wetted by the repeating step (S40), when the washing operation is started, foreign matter accumulated in the laundry is easily melted in the washing water, thereby improving washing performance.

As a result, the washing water is circulated from the lower portion of the tub 20 and the drum 30 to the upper portion by the number of times determined according to the amount of the laundry contained in the drum 30, and is scattered by the spray means 60 to the entire laundry. Since the wetting is evenly carried out, the washing water required for the initial water supply is reduced, and the time required for the preliminary operation before the washing operation is started is reduced.

The washing step (S70), the drum 30 is rotated, the washing water is circulated to start the washing operation (S72), and the step of determining whether the temperature of the washing water is more than the set temperature for the heated washing (S74) And, if the water temperature of the wash water is more than the set temperature (S76) and the heater 90 is turned off, and determining whether the set time has passed in the state in which the heater 90 is off (S78), and the set time After this, the washing water is drained, including the step (S79), and during the washing step (S70), the pump 74 is driven according to the signal of the control unit 100, the switching means 84 is washed Since the water circulation mode is maintained, the washing operation is performed while the washing water is continuously sprayed from the upper side of the tub 20 and the drum 30, so that the contact area between the laundry and the washing water is maximized, and the washing performance is improved. .

Since the control method of the drum washing machine is performed in the same rinsing operation, dehydration operation and drying operation as the conventional drum washing machine, the washing is completed.

As described above, the washing performance is improved, the time required for initial water supply and the number of washings are reduced, and the time and washing water during washing operations are also reduced, thereby reducing both the time and the cost of washing. .

In the drum washing machine and the control method according to the present invention configured as described above, the water supply pipe is branched into the main pipe and the branch pipe, and the first nozzle and the second nozzle are provided at each end, so that the washing water is removed from the tub and the drum. Since it is evenly sprayed inside, it is possible to reduce the initial water supply for washing the laundry and the number of washing water used during the washing operation, thereby reducing the cost of the washing operation.

In addition, by circulating the washing water sprayed into the tub and the drum is heated in the tub to be sprayed again from the upper side of the tub, the washing performance is improved by washing with hot washing water, and the washing water required during the initial water supply and washing operation Since it can double the savings effect, there is an advantage that can reduce the time and cost required for the laundry operation.

In addition, since the power is applied while the heater is not submerged in the wash water by the sensors installed on the upper and lower sides of the heater, the heater is prevented from being overheated, thereby preventing the malfunction and damage caused by the overheating of the heater. In addition, the electric energy required for heating the heater is prevented from being used more than necessary, thereby reducing the cost of driving the washing machine.

Claims (18)

A cabinet forming a predetermined space and having a front surface opened and having a door; A tub installed inside the door to be movable in a predetermined amount and having a predetermined space therein for washing water; A drum rotatably installed inside the tub and having a plurality of holes formed therein to accommodate laundry; A driving device installed at the tub and connected to the drum; A water supply device connected to the tub from the outside of the cabinet to supply washing water; Spraying means installed in the water supply unit to allow the washing water to splash inside the tub and the drum; A drainage device including a discharge pipe extending from the tub to the outside of the cabinet and a pump installed in the discharge pipe; A circulation device installed in the drainage device and configured to recover the washing water discharged along the drainage device to an upper side of the tub according to a control method set therein; The water supply device includes a supply pipe connected to the tub from the outside of the cabinet, and a water supply valve installed in the supply pipe, wherein the supply pipe extends to the front part of the tub and is bent to an opening side of the drum, and the supply pipe A branching pipe branching out from and connected to the upper central portion of the tub; The injection means includes a first nozzle provided at the end of the main pipe, and a second nozzle provided at the end of the branch pipe; The second nozzle is a drum washing machine characterized in that a shaft fixed by a support in the center of the end of the branch pipe extends into the tub, and a concave reflector is provided at the lower end of the shaft. The method of claim 1; Drum washing machine characterized in that it further comprises a heater installed on one side of the bottom of the tub. The method of claim 2; The tub, drum washing machine, characterized in that the recessed portion is formed on one side of the bottom so that the heater is installed. delete delete The method of claim 1; The first nozzle is a drum washing machine, characterized in that the discharge port is bent toward the inner wall of the upper surface of the drum. delete The method of claim 3; The drainage device is a drum washing machine, characterized in that it comprises the discharge pipe extending from the seating portion of the tub to the outside of the cabinet, and the pump installed in the discharge pipe. The method of claim 8; The circulation device is a drum washing machine, characterized in that installed between the discharge pipe and the supply pipe. The method of claim 9; The circulation device includes a circulation pipe installed between one side of the discharge pipe and the supply pipe, and a switching means installed at the discharge pipe to which the circulation pipe corresponds to selectively open the discharge pipe and the circulation pipe. Drum washing machine characterized in that the. The method of claim 10; The switching means, a portion of the discharge pipe is extended to a circular space and the variable portion connected to the circulation pipe, and is installed rotatably inside the variable portion to selectively close the discharge pipe and the circulation pipe according to the rotated angle A drum washing machine comprising a door member and a motor installed on a rotating shaft of the door member. The method of claim 3; The heater is disposed in the center of the seating portion, the drum washing machine, characterized in that a sensor for detecting a temperature difference between the water temperature of the upper side and the heater lower side of the heater is installed. The method of claim 12; The sensor may include a first temperature sensor installed at an upper end of the seating unit, and a second temperature sensor installed at a bottom of the seating unit. delete delete delete delete delete

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