KR100669019B1 - Drum type washing machine - Google Patents

Abstract

The present invention relates to a drum washing machine, and in particular, the present invention is to clean the condensation duct by blowing the bubbles pushed up to the condensation duct by the washing stroke to the outside of the condensation duct through the duct washing stroke, and the blowing fan and Together, the water supply system effectively removes the foam and the duct washing stroke is performed before the drying stroke to prevent the laundry from being contaminated by the foam.

To this end, the present invention provides a water tank, a rotating tank rotatably provided in the tank, a blowing fan for circulating air into the tank, a discharge duct for guiding the air discharged from the blowing fan into the tank, and air. A drum washing machine having a condensation duct for guiding a lower part of a water tank to a blower fan, the drum washing machine comprising: a controller for driving a blower fan to perform a duct washing stroke for forcedly removing and removing foreign substances in the condensation duct.

Description

Drum Washing Machine {DRUM TYPE WASHING MACHINE}

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

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

3 and 4 are views for explaining the air flow during the drying stroke in the drum washing machine according to the present invention.

5 is a control block diagram of a drum washing machine according to the present invention.

6 is a control flowchart illustrating a process in which a duct washing stroke is performed immediately after the washing stroke is finished.

7 is a control flowchart illustrating a process of performing a duct washing stroke immediately before a drying stroke.

8 and 9 are diagrams for explaining the air flow during the duct washing administration in FIGS. 6 and 7.

* Description of the symbols for the main functions of the drawings *

11: water tank 12: rotating tank

41: blower fan 42: discharge duct

43: condensation duct 44: drying heater

51: injection nozzle 52: cold water supply hose

53: dry valve 100: controller

110: motor driving unit 120: heater driving unit

130: fan driving unit 140; Valve driving part

The present invention relates to a drum washing machine, and more particularly to a drum washing machine capable of removing bubbles in the drying duct.

In general, a drum washing machine having a drying function is provided with a drying device by blowing heat by a drying heater into an accommodation space in which laundry is accommodated. The drum washing machine performs a drying function alone or dehydrates in conjunction with the washing function. After completion, perform drying function.

During the operation of the drum washing machine, when entering the drying stroke, the blower fan is operated and the drying heater is turned on so that the heat from the drying heater is blown into the rotary bath. The laundry in the rotating tub rotates along the rotating tub and then drops to the floor, and the laundry is dried. The hot air blown into the rotating tank is sucked into the blowing fan side by riding on the wall of the tank while absorbing the moisture contained in the laundry. At this time, the moisture contained in the air circulated inside the rotating tank and sucked back into the blowing fan is condensed on the wall of the tank by a small amount of cold water supplied from the condensation hose connected to the external water source to the tank wall, and flows downward. A small amount of condensate collected at the bottom is discharged to the outside along the discharge hole.

However, when the foam is excessively generated in the rotating tub during washing, for example, the foam is pushed up to the condensation duct through the bottom of the tank to contaminate the condensation duct.

Conventionally, since there is no device and algorithm for removing the bubbles thus pushed up, once contaminated, the contaminated state has to be left.

In addition, when the drying operation is performed in this state to operate the blower fan, foreign matters such as bubbles present in the condensation duct are introduced into the rotary bath along with the circulating air, which may contaminate the laundry after washing again. There is this.

The present invention is to solve the above-described problems, an object of the present invention is to perform a duct washing stroke to remove the foreign matter pushed up to the condensation duct by the washing stroke to the outside drum to maintain the condensation duct clean It is to provide a washing machine.

In addition, another object of the present invention to provide a drum washing machine that can effectively remove the foam during duct washing.

In addition, another object of the present invention to provide a drum washing machine that can prevent the laundry is recontaminated by the foam by performing the duct washing stroke before the drying stroke.

The drum washing machine of the present invention for solving the above-mentioned problems, a water tank containing water, a rotating tank rotatably provided in the water tank, a blowing fan to circulate air into the water tank, and the air discharged from the blowing fan A drum washing machine comprising a discharge duct for guiding the water tank and a condensation duct for guiding air from the lower portion of the water tank to the blower fan, wherein the duct drives the blower fan to blow out the foreign matter in the condensation duct. It includes a controller to perform the cleaning stroke.

The controller is characterized in that the duct washing stroke is performed at least once after the washing stroke and before the drying stroke is performed.

The controller is characterized by forcibly discharging the foreign matter in the condensation duct to the outside by rotating the blowing fan in a direction opposite to the rotation direction of the blowing fan during the drying stroke.

The controller is characterized by setting the rotational speed of the blowing fan at the time of duct washing stroke higher than the rotational speed of the blowing fan at the drying stroke.

The controller is characterized in that the water supply by operating the blower fan and by operating the condensing means for supplying water into the condensation duct.

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

1 and 2, the drum washing machine according to the present invention is a cylindrical water tank 11 is installed in the interior of the main body 10 for the fresh water of the wash water, and is rotatably installed in the water tank (11) It is provided with a cylindrical rotating tub 12 in which a plurality of dehydration holes are formed on the wall surface. And the lower part of the water tank 11 is provided with a drive motor 13 to perform the washing, rinsing, dehydration operation while rotating the rotating tank 12 in the water tank 11 in the forward or reverse direction. In addition, an opening 14 is formed in front of the water tank 11 and the rotating tank 12 so that a user can take out laundry from the front of the main body 10, and an opening of the water tank 11 in front of the main body 10. A door 15 for opening and closing 14 is provided.

The upper part of the water tank 11 to supply the washing water into the water tank 11 and to dissolve the detergent in the water supply process, the water supply valve (21, 22), the water supply hose (23), detergent dissolving device ( A water supply device 20 including 24 is installed. The lower portion of the water tank 11 is for forcibly draining the wash water in the water tank 11, and a drain device 30 including a drain hose 31 and a drain pump 32 is installed.

In another aspect, the present invention is provided with a drying device 40 for drying the laundry. The drying apparatus 40 includes a forward and reverse rotatable blower fan 41 installed at the upper portion of the water tank 11, an outlet 41b of the blower fan 41, and an air inlet formed above the opening 14 of the water tank 11. At the rear of the water tank 11 so as to connect between the discharge duct 42 for connecting the 17, the air outlet 18 formed in the rear lower portion of the water tank 11 and the inlet 41a of the blowing fan 41. Condensation duct 43 is mounted. In addition, the drying apparatus 40 includes a drying heater 44 installed inside the discharge duct 42 so as to supply hot air into the water tank 11, and condensation duct 43 by wet steam generated through drying of laundry. It includes a condensation means is installed in the condensation duct 43 so that water can be condensed and removed in the process of rising through. This configuration is such that the air blown by the operation of the blower fan 41 is heated through the heater 44 and then supplied to the inside of the water tank 11 so that the laundry can be heated and dried. In the process of the wet steam generated by drying is sucked toward the blowing fan 41 through the condensation duct 43, the moisture in the air can be removed.

3 and 4, the condensation duct 43 is formed between the air outlet 18 formed at the lower rear of the water tank 11 and the inlet 41a of the blower fan 41 provided at the top of the water tank 11. By forming a flow path for connecting, the curved surface is bent to a predetermined curvature and the open one surface is tightly coupled to the rear of the water tank 11 and the suction port 41a of the blowing fan 41. Accordingly, in the case of circulating air such as a drying stroke, the air outlet 18 of the water tank 11, the condensation duct 43, and the blower fan 41 are operated as the air flow of the arrow by the operation of the blower fan 41. Then, the discharge duct 42, the air inlet 12 of the water tank 11 is circulated through.

The condensation means installed in the condensation duct 43 includes an injection nozzle 51 installed inside the condensation duct 43 for injecting condensate, a cold water supply hose 52 for supplying cold water to the injection nozzle 51, and And it is provided in the middle of the cold water supply hose 52 is provided with a drying valve 53 that opens and closes to supply cold water.

A discharge port 43a for discharging the condensed water is formed at the bottom of the condensation duct 43, and one side of the discharge port 43a is connected to the drain hose 31.

As described above, when excessive bubbles are generated in the rotating tank during the washing stroke, the bubbles are pushed up to the condensation duct 43 through the water tank 11 to contaminate the condensation duct 43. In this state, when the drying stroke is performed to operate the blower fan 41, the bubbles existing in the condensation duct 43 may flow into the rotary tub 12 along the circulating air so that the laundry is finished. It may be contaminated again.

In order to prevent this, in the drum washing machine of the present invention, the condensation duct 43 is kept clean by performing a duct washing stroke to remove foreign substances in the condensation duct 43 to maintain cleanliness.

To this end, the drum washing machine of the present invention has a controller 100 that performs overall control to remove bubbles in the condensation duct 43, as shown in FIG. At the output end of the controller 100, the motor driver 69 for driving the drive motor 13, the heater driver 120 for driving the drying heater 44, and the blower fan 41 are rotated forward and backward. The fan driving unit 130 for varying and the valve driving unit 140 for driving the drying valve 53 are electrically connected.

The controller 100 performs a washing stroke, a rinsing stroke, a dehydrating stroke, and additionally performs a drying stroke. In addition, the controller 100 further performs a duct washing stroke for washing the condensation duct 43 after the washing stroke or before the drying stroke is performed. Such duct washing administration can be performed at the same time during the washing stroke, rinsing stroke, dehydration stroke.

In addition, the controller 100 may rotate the blower fan 41 in a forward or reverse direction during duct washing, and foreign matter such as bubbles in the condensation duct 43 may be re-introduced into the rotary tank 12 by the forward rotation. Since it may be introduced, it is preferably rotated in a reverse direction and discharged to the outside through the drain hose 31 through the discharge port 43a, or discharged to the lower portion of the water tank 11 through the air discharge port 18 of the water tank 11. .

For example, the controller 100 performs a washing stroke, a duct washing stroke, a rinsing stroke, a dehydrating stroke, a drying stroke, and during the duct washing stroke, the blowing fan 41 through the fan driving unit 130 during the drying stroke. Rotate at a preset speed in the opposite direction of rotation. That is, the controller 100 rotates the blowing fan 41 in the forward direction during the drying stroke, sucks the air in the condensation duct 43, and discharges the air into the rotary tub 12 through the discharge duct 42. At the time, the blowing fan 41 is rotated in the reverse direction to control the operation of sucking the air inside the rotating tub 12 and discharging it to the condensation duct 43. Accordingly, since the air in the upper portion of the rotary tank 12 is sucked by the rotation of the blower fan 41 and discharged to the condensation duct 43 side, foreign substances such as bubbles in the condensation duct 43 are condensed with the condensation duct 43. The discharge hose 31 is discharged to the outside through the connected discharge port 43a and a part is discharged to the lower portion of the water tank 11 through the air discharge port 18 of the water tank 11. At this time, the preset speed is set in advance to a rotation speed higher than the blowing fan rotation speed in the drying stroke.

On the other hand, the controller 100 controls the blower fan 41 so as to further improve the washing efficiency of the condensation duct 43 during the duct washing operation, and supplies water to the condensation duct 43 using the condensing means. At this time, the controller 100 improves the washing efficiency of the condensation duct 43 by opening the drying valve 53 through the valve driving unit 140 and supplying water from an external water supply source.

Hereinafter, a control method of a drum washing machine according to an embodiment of the present invention having the above configuration will be described according to the accompanying drawings.

Referring to FIG. 6, first, in step S100, the controller 100 drives the driving motor 13 to perform the washing stroke by reversing the rotating tub 12. In step S110, the controller 100 determines whether the washing operation is finished based on the set washing time.

As a result of the determination in step S110, when the washing administration is finished, the controller 100, as described above, when the foam generated by the washing stroke is excessive, the foam may be pushed up to the condensation duct 43 to contaminate the condensation duct In order to clean the condensation duct 43, the blower fan 41 is rotated in the opposite direction in the drying stroke so as to form an air flow as shown by the arrows shown in FIGS. 8 and 9. Accordingly, an air flow opposite to that of the drying stroke is formed, and foreign matters such as bubbles in the condensation duct are discharged to the outside through the discharge port 43a as a drain hose, and a part of the air outlet 18 of the water tank 11 is discharged. Through the bottom of the tank 11 is to be discharged. At this time, the higher the rotational speed of the blower fan 41 generates a stronger wind, it is possible to further increase the washing efficiency.

In addition, as in step S121, by using the condensation means for condensing the air circulating into the condensation duct 43 during the drying stroke, it is possible to more effectively remove foreign matters such as bubbles by supplying the condensation duct 43. In this case, the controller 61 controls the valve driving unit 140 to open the drying valve 53 to supply the cold water supplied from the external water supply source via the supply cold water hose 52 to the condensation duct ( 43) Let it spray inside.

This series of duct washing strokes lasts for a predetermined time as in step S130, and when a predetermined time has elapsed, the duct washing stroke is terminated to stop the blower fans in steps S140 and S141, respectively, and the drying valve is opened. It is closed.

Then, after the rinsing stroke, the dehydration stroke, and the drying stroke in steps S150, S160 and S170, respectively, the process ends.

As such, after the washing stroke is finished, the duct washing stroke is performed before the rinsing, dehydration, and drying stroke is performed, while the condensation duct 43 can be cleaned, but the washing is completed by foreign matter such as foam in the condensation duct in the drying stroke. The laundry can be prevented from recontaminating.

Meanwhile, as shown in FIG. 7, the duct washing stroke in FIG. 6 may be performed immediately before the drying stroke is performed. In this case, after the duct washing stroke is completed, the controller 100 controls the motor driving unit 110 to cause the laundry to fall in the rotating tub 12 to drive the driving motor 13 to rotate the tub 12. The air blown by the operation of the blowing fan 41 is dried by driving the blowing fan 41 and the drying heater 44 by controlling the fan driving unit 130 and the heater driving unit 120 in this state. After heating through the heater 44 is supplied to the interior of the water tank 11 is carried out a drying stroke to heat-dry the laundry.

As described in detail above, the present invention has the effect of cleaning the condensation duct by blowing the bubbles pushed up to the condensation duct by the washing stroke to the outside of the condensation duct through the duct washing stroke.

In addition, the present invention has the effect that can effectively remove the foam by using a water supply device with a blowing fan in the duct washing administration.

In addition, the present invention has the effect of preventing the laundry is recontaminated by the foam by performing the duct washing stroke before the drying stroke.

Claims (5)

A water tank containing water, a rotating water tank rotatably provided in the water tank, a blowing fan for circulating air into the water tank, a discharge duct for guiding air discharged from the air blowing fan to the water tank, and air to the water tank. A drum washing machine comprising a condensation duct for guiding from a lower part of the blower fan to the blowing fan, And a controller configured to perform a duct washing stroke for driving and blowing the foreign matter in the condensation duct by driving the blower fan. The drum washing machine according to claim 1, wherein the controller is performed at least once on the duct washing stroke before the washing stroke is performed. The drum washing machine according to claim 1 or 2, wherein the controller forcibly discharges the foreign matter in the condensation duct by rotating the blower fan in a direction opposite to the rotational direction of the blower fan in a drying stroke. . The drum washing machine according to claim 3, wherein the controller sets the rotation speed of the blowing fan at the time of the duct washing stroke to be higher than the rotation speed of the blowing fan at the drying stroke. The drum washing machine as set forth in claim 1, wherein the controller operates the blower fan and operates the condensing means for supplying water into the condensation duct.

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