KR101225962B1 - Vapor upsteam intercepting control method of washing machine with dryer - Google Patents

Abstract

The steam backflow prevention control method of the laundry dryer according to the present invention supplies water for condensing steam to the steam backflow prevention device installed on the water supply passage when the drying stroke is input, and prevents the steam backflow during the dehydration stroke before the drying stroke. Even if the water is flooded, there is an advantage that can prevent the back flow of steam generated during the drying stroke.

Laundry Dryer, Dry Stroke, Steam Backflow Preventer, Water, Steam

Description

Vapor upsteam intercepting control method of washing machine with dryer}

1 is a partially exploded perspective view of a laundry dryer according to the prior art,

Figure 2 is a partially cutaway side view of the drying stroke of the laundry dryer according to the prior art,

3 is a cross-sectional view of a laundry dryer to which the steam backflow prevention control method of the laundry dryer according to the present invention is applied;

4 is an exploded perspective view of the steam backflow prevention device shown in FIG. 3;

5 is an enlarged cross-sectional view when the washing water is supplied to the steam backflow prevention device shown in FIG.

FIG. 6 is an enlarged cross-sectional view when steam flows back to the steam backflow prevention device shown in FIG. 3;

7 is a flowchart illustrating one embodiment of a method for controlling the backflow of a steam in a laundry dryer according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

10: Tub 15: Motor

16: water inlet 22: water supply valve

24: detergent container 27: water supply bellows

36: drum 41: heater

42: circulation fan 50: vapor backflow prevention device

52: condensation pool 60: cap

m: po w: water

w ′: steam

The present invention relates to a steam backflow prevention control method of a laundry dryer, and more particularly, to a control method of a laundry dryer for supplying water to the steam backflow prevention device so that steam in the tub does not flow back through the steam backflow prevention device during a drying stroke. .

In general, a laundry dryer washes clothes and the like (hereinafter, referred to as 'fo') using detergent and water, and removes the moisture with hot air to dry it.

1 is a partially exploded perspective view of a laundry dryer according to the prior art, and FIG. 2 is a partially cutaway side view of the laundry dryer according to the prior art during a drying stroke.

1 and 2, the laundry dryer according to the related art includes a casing 1, a tub 10 mounted inside the casing 1 and containing wash water, and an inside of the tub 10. The drum 40 is arranged to be rotatable, and the drum 40 is accommodated therein, and a drying device 50 for drying the cloth m in the drum 40.

The casing 1 includes a base 2, a cabinet 4 disposed above the base 2 and having a front surface open, and a cabinet disposed at the front surface of the cabinet 4 and having a po-out hole 5 formed therein. It consists of a cover 6 and a top cover 8 arranged on the upper surface of the cabinet 4.

The cabinet cover 6 is rotatably mounted with a door 7 for opening and closing the cloth access hole 5.

On the upper side of the cabinet cover 6, a control panel 9 for operating the washing machine is installed.

The tub 10 is mounted on the damper 11 connected to the base 2 to be bufferably supported on the base 2, and is connected to the spring 12 connected to the cabinet 4 so that the tub 10 is suspended. The cabinet 4 is bufferably supported.

The tub 10 has an opening hole 13 formed at the center of the front surface thereof, and a gasket 14 which is in close contact with the door 7 when the door 7 is closed to prevent the washing water or the cloth m from being separated. Is mounted.

The tub 10 is equipped with a motor 15 for rotating the drum 40.

The tub 10 has a water supply port 16 formed on one side of the tub 10 and a water supply device 20 for supplying wash water to the water supply port 16 is connected.

The water supply device 20 has a water supply passage for supplying water in which the detergent is mixed or water in which the detergent is not mixed into the tub 10.

The water supply device 20 is connected to the external hose 21, the water supply valve 22 for intermitting the wash water supplied through the external hose 21, and to guide the wash water passed through the water supply valve 22 The water supply hose 23, the detergent container 24 formed with a detergent container and a discharge port so that the detergent is contained, the detergent container housing 25 in which the detergent container 24 is accommodated, and the water guided by the water supply hose 23 The dispenser 26 leading to the detergent container 24 and the detergent container discharged from the detergent container 24 by having one end connected to the detergent container housing 25 and the other end connected to the water supply port 16 of the tub 10. It comprises a water supply bellows 27 for guiding the mixed water or water not mixed with the detergent to the water supply port 16 of the tub 10.

The tub 10 has a drain hole 18 formed at the lower center side, and a drain device 30 for draining the wash water to the drain hole is connected.

The drainage device 30 is connected to a drain hole of the tub 10 to drain the bellows 31 for guiding the wash water in the tub 10 and a drain pump for pumping the wash water guided to the drain bellows 31. And a drain hose 33 for guiding the wash water pumped by the drain pump 32 to the outside of the casing 10.

The drum (36) is formed in the center of the front of the laundry access hole (37) for entering the laundry, the periphery or the back portion is formed with a through hole 38 through which the wash water or air flows in, the inner circumference The lift 39 is mounted to protrude so that it can be raised and dropped.

The drying apparatus 40 includes a drying duct 43 having a heater 41 and a circulation fan 42 embedded therein to supply hot air to the drum 40, and air inside the tub 10. A water supply nozzle 45 formed at one side of the condensation duct 44 and the condensation duct 44 to flow cooling water into the condensation duct 44 to condense moisture in the air passing through the condensation duct 44. ), A coolant hose (46) for guiding the coolant to the water supply nozzle (45), and a coolant valve (48) for intermitting the coolant supplied from the external hose (47) to the coolant hose (46). .

Looking at the operation of the prior art configured as described above are as follows.

First, during the washing or rinsing stroke, the water supply device 30 supplies the washing water to the inside of the tub 10, the motor 15 is driven to rotate the drum 36, and the cloth (m) The washing water and washing is performed while flowing in the drum 36.

When the above washing or rinsing stroke is completed, the drainage device 30 drains the washing water in the tub 10 to the outside of the washing machine.

Then, the washing machine proceeds to a dewatering stroke, and when the motor 15 rotates the drum 36 at high speed, the cloth m is rotated together with the drum 36 so that water is centrifugally dewatered.

In addition, the washing machine drives the motor 15 during a drying stroke to rotate the drum 36 left and right alternately, to turn on the heater 41 and the circulation fan 42, and the water supply nozzle 45. Feed the coolant through.

When the circulation fan 42 is turned on, the air A in the drum 36 flows toward the through hole 38 of the drum 36 by a negative pressure formed by the rotation of the circulation fan 42. In contact with m) it exchanges heat / material with fabric (m) and turns into wet air.

The wet air (steam) passes through the through hole 38 of the drum 36 and the tub 10 and the drum 36 in order to be sucked into the condensation duct 44.

The sucked wet air is condensed by the cooling water while passing through the condensation duct 44 to lower the humidity, and is then heated by the heater 41 while passing through the drying duct 43 to be converted into high temperature and low humidity. Circulated inside the drum 36 to dry the fabric m.

However, in the conventional laundry dryer, steam B in the tub 10 passes through the water supply port 16 and the inlet bellows 27 of the tub 10 in the middle of the drying stroke, and flows out into the detergent container 24 so as to discharge the detergent container 24. (24) and its surroundings, and there is a dust spot where dew condensation occurs due to steam flowing out of the washing machine.

On the other hand, if the water supply or the inlet bellows (27) of the tub 10 is provided with a separate steam backflow prevention device for condensing to remove the backflow steam by collecting water inside, it is possible to prevent the contamination as described above However, in this case, water in the steam backflow prevention device may be released by the vibration of the tub 10 during the dehydration stroke, and steam may flow back through the steam backflow prevention device during the drying stroke after the dehydration stroke. There is this.

The present invention has been made to solve the above problems of the prior art, even if the water in the steam backflow prevention device is released during the dehydration stroke before the drying stroke, by supplying water to the steam backflow prevention device during the drying stroke, the drying stroke It is an object of the present invention to provide a method for controlling a laundry dryer to prevent backflow of steam during the process.

The control method of the laundry dryer according to the present invention for solving the above problems is a first step of detecting the amount of drying during the drying stroke; And a second step of operating the drying device after the first step, rotating the drum, and supplying water to the steam backflow prevention device installed in the water supply passage.

In addition, the second step is characterized in that when the drum is first rotating in one direction, the water supply valve installed in the water supply flow path is opened for a set time.

The set time may be set in proportion to the volume of the condensation pool of the steam backflow prevention device.

The control method of the laundry dryer according to the present invention is characterized in that water is supplied to the steam backflow prevention device installed on the water supply passage during the drying stroke.

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

3 is a cross-sectional view of the laundry dryer to which the method for controlling the steam backflow prevention of the laundry dryer according to the present invention is applied.

The same configuration as the conventional one uses the same reference numerals and detailed description thereof will be omitted.

The laundry dryer shown in FIG. 3 has a steam backflow that prevents steam w in the tub 10 from flowing back into the detergent container 24 through the water inlet 16 and the inlet bellows 27 of the tub 10. The prevention device 50 is provided.

The steam backflow prevention device 50 is a kind of condenser that condenses and removes backflow steam w ′ by water (w). The inside of the tub 10 and the water supply port 16 of the tub 10 are provided. It may be provided in at least one of the interior, the interior of the inlet bellows 27, and the interior of the detergent container 24.

When the steam backflow prevention device 50 is provided inside the tub 10, the possibility of collision with the drum 36 is large, and when provided inside the inlet bellows 27, the vapor backflow prevention device 50 is difficult to install and conserves water (w). If this is difficult, and provided inside the detergent container 24, the structure of the detergent container 24 is complicated and the size of the detergent container 24 is increased, which is provided inside the water supply port 16 of the tub 10. Most preferred.

FIG. 4 is an exploded perspective view of the steam backflow prevention device shown in FIG. 3, FIG. 5 is an enlarged cross-sectional view of washing water supplied to the steam backflow prevention device shown in FIG. 3, and FIG. 6 is a steam backflow shown in FIG. 3. An enlarged sectional view when steam flows back into the prevention device.

As shown in FIGS. 4 to 6, the steam backflow preventing device 50 is located inside the water supply port 16 of the tub 10 and a water supply passage 51 is formed between the water supply port 16. Pool 52 for condensation; The condensate pool 52 guides the washing water w supplied to the water supply port 16 to the condensation pool 52 and flows back through the water supply passage 50. It is configured to include a cap 60 to block the flow into.

The condensation pool 52 has an upper surface 53 open so that the washing water w overflowed.

The condensation pool 52 has a circumferential portion 54 formed with the inner wall 17 of the water supply port 16 so as to form the water supply passage 50 between the inner wall 17 of the water supply port 16. Spaced apart.

That is, the water supply flow path of the wash water w is formed in a zigzag shape in which the '∪' type flow path and the '∩' type flow path are continuous.

At least one rib 55 connects the condensation pool 52 and the water inlet 16 between the circumference 54 of the condensation pool 52 and the inner wall 17 of the water inlet 16. Is formed.

The ribs 55 are formed long and vertically, and have a thin thickness.

The ribs 55 are formed to be spaced apart from each other.

The condensation pool 52 has a bottom portion 56 formed on the tub 10 and the concentric circle O.

The condensation pool 52 and the rib 55 are integrally formed together with the water inlet 16 during injection molding of the tub 10.

The cap 60 is located above the water supply passage 60 to shield the rise of steam (W ') (62); It consists of a hollow water supply portion 64 integrally formed in the shielding portion 62 so as to protrude toward the interior of the condensation pool (52).

The shield 62 has an outer diameter D that is fitted to the inner wall 17 of the water inlet 16 to be inserted into the water inlet 64.

The water supply portion 64 is formed to gradually decrease in diameter toward the lower side.

The water supply part 64 has a height H at which the lower end 65 is lower than the upper surface 53 of the condensation pool 52, and spaced apart from the bottom surface 57 of the condensation pool 52.

7 is a flowchart illustrating one embodiment of a method for controlling the backflow of a steam in a laundry dryer according to the present invention.

In the laundry dryer according to the present embodiment, water is supplied to the steam backflow prevention device 50 in preparation for the case where the water of the steam backflow prevention device 50 is flooded by the dehydration stroke before the drying stroke during the drying stroke.

Since the water supplied may be flooded back to the outside during the detection of the quantity of the drying stroke, the laundry dryer supplies water (w) to the steam backflow prevention device 50 after the quantity of detection is completed.

That is, when the drying stroke is input, the laundry dryer detects a quantity of water first. (S1) (S2)

In this case, the detection of the quantity of fuel may be performed using the time taken for the drum 36 to rotate one time by starting the motor 15. After maintaining the constant speed, the motor is turned off, and the pulse width modulation (PWM) duty value from the time of starting the motor to the constant speed is measured, and the pulse width modulation measured by the rotational rotation angle after the motor 30 is turned off ( PWM) It is also possible to finally determine the amount of capacity by adding a value obtained by multiplying the average value of the duty value by a proportional constant and a value obtained by multiplying the proportional constant by the rotational angle by the force.

The laundry dryer determines the subsequent drying time or degree of drying according to the detected quantity of water, and starts drying by controlling the motor 15, the heater 41, the circulation fan 42, and the cooling water valve 48. (S3)

The laundry dryer is connected to the condensation pool 62 when the motor 15 rotates the drum 36 for the first time in one direction (for example, the first left rotation among left and right rotations) after the quantity detection. The water supply valve 22 is opened for a set time (for example, 20 seconds to 30 seconds) so that water can be supplied. (S4) (S5)

The laundry dryer waits without opening the water supply valve 22 before first rotating the drum 36 in one direction. (S4) (S6)

Here, the set time is set in proportion to the volume of the condensation pool 52, when the volume of the condensation pool 52 is small, a small amount of water is set to supply water, If the volume is large, a relatively large amount of water is set.

The opening of the water supply valve 22 may be performed after the drying is performed for a considerable time, and may be performed at the initial stage of drying as described above. As described above, the drum 36 will be described as being limited to the one implemented when the first one direction of rotation.

When the washing dryer is turned on, the water of the external hose 21 is supplied to the water supply hose 23 through the water supply valve 21, and then the dispenser 26, the detergent container 24, It passes through the detergent container housing 25 and the water supply bellows 27 in order, and is guided inside the water supply port 16 of the tub 10.

Water (w) guided to the water supply port 16 of the tub 10 is guided to the upper surface of the shielding portion 62 of the cap 60 is dropped to the water supply portion 64 of the cap 60, The condensation pool 52 is filled.

Meanwhile, in the laundry dryer, steam B is generated inside the tub 10 under the control of the heater 41 and the circulation fan 42, and part of the steam B is partially supplied to the water supply passage 51. Is raised along.

Elevated steam (B) is blocked by the shield 62 of the cap 60, and then condensed in contact with the water (w) filled in the condensation pool 52, the tub 10 The steam B does not flow back to the water inlet 16.

The laundry dryer performs drying according to the quantity in the state in which the backflow of steam is blocked as described above, and when the drying is completed, performs cold air drying controlling only the motor 15 and the circulation fan 42. Then, the entire drying ends. (S7)

On the other hand, the present invention is not limited to the above embodiment, the opening of the water supply valve 22 may be carried out before the initial rotation of the drum 36, various implementations are possible within the technical scope to which the present invention belongs. Of course.

The steam backflow prevention control method of the laundry dryer according to the present invention configured as described above is configured to supply water for condensing steam to the steam backflow prevention device installed on the water supply flow path when a drying stroke is inputted, so that Even if the water of the steam backflow prevention device is flooded along the way, there is an advantage of preventing the backflow of steam generated during the drying stroke.

In addition, the steam backflow prevention control method of the laundry dryer of the present invention may be flooded with water supplied during the detection of the amount of water, so that water is supplied to the steam backflow prevention device after the detection of the amount of water, thereby minimizing the amount of water and the number of times of water supply There is an advantage.

In addition, the steam backflow prevention control method of the laundry dryer of the present invention opens the water supply valve for a set time proportional to the volume of the condensation pool of the steam backflow preventing device, thereby preventing an excess or shortage of water supplied to the condensation pool. There is this.

Claims (4)

A first step of detecting the amount of dry during the drying stroke; And A steam backflow comprising a second step of operating the drying device after the first step and rotating the drum and supplying water for a set time proportional to the volume of the condensation pool of the steam backflow prevention device installed in the water supply flow path. Control method. The method of claim 1, In the second step, when the drum is first rotated in one direction, the steam backflow prevention control method of the laundry dryer, characterized in that for opening the water supply valve installed in the water supply passage for the set time. delete delete

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