KR101155486B1 - Drying method of drying and washing machine - Google Patents

Abstract

The present invention relates to a drying and washing machine in which the amount of laundry is detected in accordance with a change in temperature of a turbine and a condensing duct measured according to a drying time and a time during which hot air drying is performed according to the laundry amount is set, The temperature difference between the turbine and the condensing duct is corrected according to the continuous drying and the general drying by determining whether the continuous drying is carried out continuously after the completion of the previous drying step in the initial stage of drying, And general drying, the laundry is dried by the optimum drying method, and the drying performance and the power consumption are optimized.

Drying Combination Drum Washing Machine, Drying Duct, Condensing Duct, Heater, Blower, Temperature Sensor, Normal Drying, Continuous Drying

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a drying method of a washing machine,

1 is a cross-sectional view illustrating an internal structure of a drum washing and drying machine according to the present invention,

FIG. 2 is a flowchart showing a drying method of the drum washing machine combined with a dryer according to the present invention,

FIG. 3 is a flow chart showing the drying method for general drying in FIG. 2,

Figure 4 is a flow chart illustrating the drying method for continuous drying of Figure 2,

FIG. 5A is a graph showing the drying time and the temperature sensing value of the drying and washing machine according to the present invention,

FIG. 5B is a graph showing drying time and temperature difference values of the drying and washing machine according to the present invention,

DESCRIPTION OF THE REFERENCE NUMERALS

1: Dry Combined Drum Washing Machine 2: Cabinet

8: tub 12: drum

14: motor 26:

38: Heating heater 40: Drying duct

42: drying heater 44: blower

50: condensing duct 52: cooling water supply mechanism

60: first temperature sensor 62: second temperature sensor

64: third temperature sensor Tt: internal temperature of the tub

Tc: internal temperature of the condensing duct Δt: temperature difference value

The present invention relates to a drying method of a washing machine combined with a drying machine. More particularly, it relates to a drying method of a drying machine combined with a drying machine, And more particularly, to a drying method of a washing machine combined with a drying machine.

Generally, a washing machine is a device for washing laundry through processes such as washing, rinsing and dehydration to remove contamination from clothing, bedding, etc. (hereinafter referred to as "laundry") by using water, detergent and mechanical action to be.

In particular, in recent years, there has been an increasing tendency to use washing and drying machines capable of performing not only washing and dewatering functions of laundry but also drying functions of laundry, so that the washing machine combined with washing and drying, And then the laundry is dried to an appropriate level through a drying process.

In the drying process of the washing machine, the hot air dried by the drying duct having the blower and the heater is supplied to the inside of the tub to dry the laundry in the tub, and the moist air dried by the laundry is condensed by the condensing duct And is circulated to the drying duct.

Meanwhile, the drying method of the washing machine combined with the drying method includes a manual drying method in which drying is performed until a drying time set by a user is set, a drying method in which a drying course is set by a user and a drying There is an automatic drying method that progresses.

In the manual drying method described above, there is a high possibility that overdrying or undried drying will occur depending on the amount of laundry laundered. Therefore, in recent dry laundries, the laundry is dried by the automatic drying method.

Therefore, the drying and washing machine is provided with a temperature sensor in the tub and the condensing duct so that the laundry can be detected by the internal temperature of the tub and the condensing duct.

That is, in the drying and washing machine, the temperature sensor senses the internal temperature of the turbine and the condensing duct as the drying stroke progresses. If the difference between the temperature sensed values is greater than the set value, And drying is performed according to the amount of the laundry.

Generally, since the temperature sensing value of the condensing duct is higher than the temperature sensing value of the tub, the temperature difference between the condensing duct and the tub is a value obtained by subtracting the temperature sensing value of the tub from the temperature sensing value of the condensing duct.

However, according to the drying method of the conventional washing machine, the amount of laundry is calculated according to the temperature difference between the tub and the condensing duct. However, when the next drying cycle is performed immediately after the completion of one drying cycle, There is a problem that the temperature sensing value of the turbine and the condensing duct is abnormally sensed and the drying stroke of the drying and washing machine is abnormally operated.

That is, if the laundry is dried again by the drying and washing machine, or if the other laundry is further dried in a state where the drying cycle of the drying and washing machine is completed, since the tub is already heated in the previous drying cycle, The temperature sensing value sensed by the temperature sensor of the turbine and the condensing duct is sensed very high and the temperature difference between the turbine and the condensing duct is sensed above the set value, especially since the temperature of the condensing duct is relatively higher than the tub.

Therefore, even when the laundry is dried up to a predetermined limit drying time of the drying and washing machine, the temperature difference between the turbine and the condensing duct is not detected at the initial stage of drying, Therefore, there is a problem that automatic drying can not be performed due to the laundry amount.

As described above, when the laundry is dried to a predetermined limit drying time and then forcibly terminated, overdrying and damage of the laundry are caused and the power consumption is unnecessarily increased.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method of determining whether a continuous drying process is performed after a previous drying process is completed, The drying performance of the laundry and the power consumption can be optimized according to the continuous drying and the general drying.

In order to accomplish the above object, the present invention provides a method of controlling a washing machine, the method comprising the steps of: detecting a laundry amount according to a temperature difference between a tub and a condensing duct measured according to a drying time, In the drying method of a washing machine for drying in which drying is progressed, it is determined whether the drying is continuous drying in which drying is continuously performed after completion of the previous drying step at the beginning of drying, and it is determined whether the drying is continuous drying or general drying, And the temperature difference of the condensing duct and the condensing duct are corrected differently.

In the determination of the continuous drying and the general drying, when either one of the temperature detection values of the turbine and the condensing duct is higher than the set temperature after the hot air drying is performed for the set time, it is determined as continuous drying or the general drying is determined.

The drying method of the drying and washing machine according to the present invention includes a first step in which hot air drying is performed and a temperature of a turbine and a condensing duct is sensed, and a second step of heating the turbine and the condensing duct A second step of judging whether the temperature is sensed continuously or not when the temperature is higher than the predetermined temperature; and a second step of determining that the temperature is sensed by the turbine and the condensing duct after the hot air drying is performed for the second predetermined time. A fourth step in which the correction value is corrected for the temperature difference in the third step when the continuous drying is determined in the second step, and a third step in which if the temperature difference between the corrected turbine and the condensing duct is equal to or greater than the set value A fifth step in which an additional time of hot air drying is calculated according to the drying time, and a fifth step in which hot air drying is performed for a further time of the hot air drying, It consists of six steps:

The first set time is set to 1 minute, and the set temperature is set to 40 ° C.

In the fourth step, the correction value is subtracted from the temperature difference between the turbine and the condensing duct so that the temperature difference between the turbine and the condensing duct is largely detected due to the previous drying stroke.

The correction value is set at 5 占 폚.

In the fifth step, the time for further performing the hot air drying from the predetermined table according to the corrected temperature difference and drying time of the turbine and condensing duct is calculated.

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

1 is a cross-sectional view illustrating the internal structure of a drum washing and drying machine according to the present invention.

1, the drying and washing machine according to the present invention includes a cabinet 2 for forming an outer appearance, and an inner member 4 which is capable of being buffered by an elastic member 4 and a damper 6 inside the cabinet 2 A drum 12 having a plurality of through holes 10 formed in the tub 8 so as to be rotatable and a drum 12 rotatably installed in the rear of the tub 8 And a lifter 16 installed on the inner surface of the drum 12 so that the laundry can be dropped by gravity after the laundry is pumped up to a certain height.

A cabinet cover 18 having a laundry inlet 18A is mounted on the front of the cabinet 2. A door 20 for opening and closing the laundry inlet 18A is rotatably installed on the cabinet cover 18, Between the laundry inlet 18A and the tub 8 is provided a gasket 22 for relieving impact caused by rotation of the drum 12 and serving as a packing to prevent washing water from overflowing to the outside.

A display unit for indicating the operation state of the drying and combining drum washing machine 1 is formed on the cabinet cover 18 and a control panel 24 having an operation unit for operating the drying drum washing machine 1 A control unit 26 for controlling the operation of the drum washing machine 1 is installed in the cabinet 2 and is connected to the control panel 24 so as to transmit signals.

A water supply valve 28 for supplying washing water and detergent to the inside of the tub 8 and a water supply hose 30 and a detergent supply device 32 are provided on the upper side of the tub 8, A drain pump 34 and a drain hose 36 are connected to the lower side of the tub 8 so as to discharge the washing water stored in the tub 8 to the outside.

The drum washing machine 1 is provided with a boil heater 38 on the inner lower side of the tub 8 so that the washing water contained in the tub 8 can be heated and washed, Drying means is installed on the upper side and the rear side of the tub 8 so that the laundry introduced into the drum 12 can be dried by hot hot air.

The drying means includes a drying duct 40 for discharging hot air dried inside the tub 8 and a drying duct 40 connected to the drying duct 40 and the tub 8 and connected to the drying duct 40 And a condensing duct 50 for condensing the circulated air to remove moisture.

The drying duct 40 is disposed on the upper side of the tub 8 in the front and rear direction. The front portion of the drying duct 40 is communicated with the upper portion of the front surface of the tub 8, and a drying heater 42, (44).

The drying heater 42 functions to heat the low temperature and low humidity air introduced from the condensing duct 50 with air of high temperature and low humidity and the blower 44 is configured to cool the condensed air And the air heated by the drying heater 42 is blown to the tub 8.

The upper end of the condensing duct 50 is connected to the rear end of the drying duct 40 and the lower end of the condensing duct 50 is connected to the rear end of the tub 8, And a cooling water supply mechanism 52 for condensing the humid air introduced from the tub 8 is provided inside.

The drying unit and the tub 8 are connected to the control unit 26 so that the operations of the drying heater 42, the blower 44 and the boil heater 38 can be smoothly controlled by the control unit 26. [ A plurality of temperature sensors are provided.

That is, a first temperature sensor 60 for sensing the internal temperature of the tub 8 is installed in the lower portion of the tub 8, and the condensed water is condensed in the condensed duct 50 by the cooling water supply mechanism 52 A second temperature sensor 62 for sensing the temperature of the air is installed and a third temperature sensor 64 for sensing the temperature of the air heated by the drying heater 42 is installed in the drying duct 40 .

The first temperature sensor 60 senses the temperature of the washing water heated by the boiling heater 38 during boil washing and senses the temperature of the air in the tub 8 during drying.

The second temperature sensor 62 senses the temperature of the air flowing into the drying heater 42 after being condensed in the condensing duct 50 during drying.

The third temperature sensor 64 senses the temperature of hot air supplied to the inside of the tub 8 to prevent damage to the laundry due to overheating of the drying heater 42 during drying.

Hereinafter, the operation and control method of the drying and washing machine according to the present invention will be described.

FIG. 2 is a flowchart showing a drying method of a drum type washing and drying machine according to the present invention, FIG. 3 is a flowchart showing a drying method for general drying in FIG. 2, FIG. 5A is a graph showing the drying time and the temperature sensing value of the washing and drying machine according to the present invention, and FIG. 5B is a graph showing drying time and temperature difference values of the drying and washing machine according to the present invention to be.

First, in the drum washing machine for drying, the washing water is supplied to the inside of the tub 8 by the water supply valve 28 and the water supply hose 30, and the detergent is supplied by the detergent supply device 32.

When the washing operation of the laundry is completed, the drain pump 34 and the drain hose 36 are opened and closed, respectively, when the laundry is laundered by the driving motor 16, The washing water is drained to the outside.

After the clean water is supplied again to the tub 8, the drum 12 is rotated forward and backward to rinse the laundry. When the laundry is rinsed, the washing water used for the rinsing It is drained again.

When the boil-off heater 38 is operated during the washing and rinsing of the laundry, the washing water stored in the tub 8 is heated to a high temperature so that the washing and washing of the laundry proceeds.

At this time, the temperature of the washing water heated by the boiling heater 38 is sensed by the first temperature sensor 60, and the temperature of the boiling water heater 38 is controlled according to the temperature sensed value of the first temperature sensor 60, Is appropriately controlled by the control unit 26 so that the wash water is heated to an appropriate temperature.

When the rinse cycle is repeated several times, the drum 12 is rotated at a high speed, water contained in the laundry is dehydrated by the centrifugal force, and the dehydrated laundry is dried to a degree desired by the user.

That is, the blower 44 and the drying heater 42 are driven into the tub 8 to supply dry hot air through the drying duct 40. The drum 12 is rotated at a low speed, And dried.

At this time, the hot air supplied to the inside of the tub 8 by the drying duct 40 flows into the laundry dewatered through the through hole 10 of the drum 12, and the laundry is stirred by the drum 12 The humid air containing a large amount of moisture flows out of the through hole 10 of the drum 12 and flows into the condensing duct 50.

The humid air introduced into the condensing duct 50 is contacted with the cooling water flowing down by the cooling water supply mechanism 52 to condense moisture and the air condensed in the condensing duct 50 flows to the drying duct 40 And is heated while passing through the drying heater 42.

The cycle in which the air circulates is repeatedly performed, so that the laundry in the drum 12 is dried.

In particular, the internal air temperature of the tub 8 is sensed by the first temperature sensor 60, the condensed air temperature of the condensing duct 50 is sensed by the second temperature sensor 62, The dry hot air of the drying duct 40 is sensed by the third temperature sensor 64.

The operation of the drying heater 42 is controlled by the controller 26 according to the temperature sensed by the third temperature sensor 64. That is, when the temperature detection value of the third temperature sensor 64 is detected to be higher than the allowable temperature, the power supplied to the drying heater 42 is supplied to the drying heater 42 to prevent the overheat of the drying heater 42 and the heat damage of the laundry. On / off control by the control unit 26. Fig.

When the temperature sensing values of the first temperature sensor 60 and the second temperature sensor 62 are transmitted to the controller 26, the controller 26 controls the amount of laundry The drum washing machine 1 is operated according to the drying method set by the controller 26. The drying drum washing machine 1 is operated in accordance with the drying method set by the controller 26. [

The drying method of the drying and washing machine according to the present invention will be described with reference to FIGS. 2 to 5A and 5B.

2, the hot air dried by the drying duct 40 is supplied to the tub 8 to perform hot-air drying of the laundered and dehydrated laundry, and the first temperature sensor 60 and the second temperature sensor 2 temperature sensor 62 detects the internal temperature Tt (Tc) of the tub 8 and the condensing duct 50. (See S1 and S2)

That is, the internal temperature Tt of the tub 8 is sensed by the first temperature sensor 60, and the condensed air temperature in the condensing duct 50 is detected by the second temperature sensor 62 Tc) is detected.

When the hot air drying is performed for a first set time, the temperature sensed value Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is compared with the set temperature, And the drying is discriminated. (See S3, S4, S5, and S6)

If it is determined that the temperature detection values Tt (Tc) of the first temperature sensor 60 and the temperature detection value Tc (Tc) of the second temperature sensor 62 are less than the predetermined temperature, It is judged that it is general drying to be carried out after the completion of the previous drying process, or general drying which is performed after a sufficient time has elapsed after the previous drying process is finished.

Since the conventional drying does not cause the internal temperature of the tub 8 to rise due to the previous drying cycle, the temperature sensed value Tt of the first temperature sensor 60 and the second temperature sensor 62 is increased, (Tc) is normally detected and the laundry is dried normally.

On the other hand, if any one of the temperature sensed value Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is equal to or higher than the preset temperature, It is judged to be continuous drying in which drying proceeds.

Since the internal temperature of the tub 8 is raised by a predetermined level or more due to a previous drying cycle, the temperature sensed value Tt of the first temperature sensor 60 and the second temperature sensor 62 may be increased, (Tc) is abnormally higher than that of general drying.

Hereinafter, in the present embodiment, the first set time and the set temperature are set to '1 minute' and '40 ° C' respectively, and the temperature sensed value to be compared with the preset temperature is sensed by the second temperature sensor 62 The internal temperature Tt of the condensed duct 50 will be described.

That is, if the temperature detection value Tc of the second temperature sensor 62 is less than 40 ° C after the drying cycle is performed for 1 minute, the drying cycle is determined as general drying, The drying cycle is judged to be continuous drying.

As shown in FIG. 3, the general drying method of the drying and washing machine 1 includes the first temperature sensor 60 and the second temperature sensor 62, The internal temperature Tt of the tub 8 and the condensed air temperature Tc of the condensing duct 50 are respectively sensed by the control unit 50. (S10, S11)

When the hot air drying is carried out up to the second set time, the temperature difference Ta with respect to the temperature sensed value Tt at the second set time is calculated by a calculation formula, (Ta). (See S12 and S13)

As the hot air drying is performed after the second set time, the temperature difference Tb for the temperature detection value Tt after the second set time is calculated by an equation, and the calculated temperature difference Tb ) And the temperature difference value? T for the reference temperature difference Ta are calculated (see S14 and 15)

Ta = (Tc-Tt + 30) 3

Tb = (Tc-Tt + 30) 3

? T = Tb-Ta

The temperature difference Ta of the temperature detection value Tt of the first temperature sensor 60 and the temperature difference Tc of the second temperature sensor 62 can be expressed by the following equation A positive constant is added to a value obtained by subtracting the temperature sensed value Tt of the first temperature sensor 60 from the temperature sensed value Tc of the second temperature sensor 62, and then multiplication is performed by a predetermined multiplier.

The constant is a positive number added so that the difference between the temperature detection value Tt and the temperature detection value Tc does not become negative. Since the temperature difference value? T is all eliminated in the process of calculating the temperature difference value Tt, Distortion does not occur.

That is, since the reference temperature difference Ta is subtracted from the temperature difference Tb calculated after the second set time to obtain the temperature difference value? T, the calculated temperature difference Tb is compared with the reference temperature difference Ta, Are added to each other in the calculation process.

The multiplier is an integer multiplied by the temperature difference Ta between the first temperature sensor 60 and the second temperature sensor 62 so that the first temperature sensor 60 and the second temperature sensor 62 ) Is increased at a constant rate corresponding to the multiplier to improve the sensitivity to the temperature difference value? T.

In the present embodiment, the constants and multipliers are set to '30' and '3', and the second set time is set to '5 minutes'.

When the calculated temperature difference value? T reaches the set value? T, the laundry amount is detected from the drying time up to the current hot air drying time, and hot air drying is further performed according to the laundry amount (See S16 and S17)

As shown in Table 1, the set value? T is a predetermined value according to a drying course of the laundry, and a table in which a hot air drying additional time is set according to the drying time (Sensing Time) Is stored in the controller 26 and used for calculating the additional time of the hot air drying.

That is, when the drying course is weak, the set value T is set to 35, and the hot air drying additional time is set to 0 regardless of the drying time.

The setting value? T is set to 50 when the drying course is standard, and the hot-air drying additional time is 12 minutes when the drying time is less than 100 minutes. When the drying time is 100 minutes or more, The time is set to a time at which '88 minutes' is subtracted from the drying time.

When the drying course is strong, the set value T is 50. When the drying time is less than 50 minutes, the hot air drying additional time is 22 minutes. When the drying time is 50 minutes or more, The time is subtracted from '50 minutes' in the drying time, and '22 minutes' is added at the time when '0.7' is evaporated.

When the drying time is less than 60 minutes, the hot-air drying time is set to 21 minutes. When the drying time is less than 60 minutes, the set value T is 35 minutes. When the drying time is less than 60 minutes, The additional time is '21 minutes' added at the time when '0.6' is multiplied after '60 minutes' is subtracted from the drying time.

5A and 5B, the drying temperature of the drum type washing and drying machine 1 is measured by the first temperature sensor 60 and the second temperature sensor 60. In particular, The temperature detection value Tt of the first temperature sensor 60 and the temperature detection value Tt of the second temperature sensor 62 are increased in the middle of the drying period The temperature sensing value Tt of the first temperature sensor 60 is lowered at the end of the drying period while the temperature sensing value Tc of the second temperature sensor 62 is lowered The temperature difference Ta between the first temperature sensor 60 and the second temperature sensor 62 is greatly increased.

Here, the temperature sensed value Tt (Tc) of the first temperature sensor 60 and the sensed temperature value Tc (Tc) of the second temperature sensor 62 are substantially the same during the initial stage of drying and the middle stage of the drying, The temperature difference Ta (Tb) between the temperature detection value Tt (Tc) of the first temperature sensor 60 and the temperature detection value Tt (Tc) of the first temperature sensor 60 is changed as the temperature difference Tc changes with a certain degree of ripple. ) Will be calculated as a negative number.

The calculation of the temperature difference (Ta) (Tb) is performed so that the temperature difference (Ta) (Tb) of the temperature detection value (Tc) Constants are added. Since the temperature difference value? T with respect to the temperature difference Ta between the first temperature sensor 60 and the second temperature sensor 62 is calculated to be very small, the calculation of the temperature difference Ta (Tb) Is multiplied by a multiplier having a predetermined size.

At the end of the drying, the temperature detection value Tt of the first temperature sensor 60 and the second temperature sensor 62 is increased to increase the temperature difference value? T.

After the hot-air drying additional time is calculated by the above-described method, the hot-air drying is further performed until the hot-air drying is further performed, the cold drying is performed for a certain period of time, and the general drying cycle is terminated (see S18 and S19)

The cold air drying is performed for the purpose of preventing the risk of burning due to the high temperature of the laundry when the laundry is drawn out from the drying and combining drum washing machine 1, Only the blower 44 is driven for a certain period of time, and the temperature of the laundry dried by the low-temperature cold air supplied from the drying duct 40 is lowered.

As shown in FIG. 4, the continuous drying method of the drying and washing machine 1 includes the first temperature sensor 60 and the second temperature sensor 62, The internal temperature Tt of the tub 8 and the condensed air temperature Tc of the condensing duct 50 are sensed by the control unit 50. See S20 and S21,

At this time, since the drying cycle of the drying and combining drum washing machine 1 is a state in which the next drying cycle is performed immediately after the previous drying cycle is completed, the self-temperature of the tub 8 has already reached a certain level at the initial stage of drying .

Therefore, the temperature detection value Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is abnormally high at the initial stage of drying as compared with general drying, The temperature detection value Tc of the first temperature sensor 62 is detected to be relatively larger than the temperature detection value Tt of the first temperature sensor 60. [

When the hot air drying is performed up to the second set time, the temperature difference value? T with respect to the temperature sensed value Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is corrected Lt; / RTI > (See S22)

That is, in the continuous drying, since the temperature detection value Tt (Tc) of the second temperature sensor 62 is detected to be larger than that of the first temperature sensor 60, the temperature difference value? (Tb) between the first temperature sensor 60 and the second temperature sensor 62 is calculated to be very large, the temperature difference value? T after the second set time always becomes Exceeds the set value? T.

Accordingly, in the continuous drying, the first temperature sensor 60 and the second temperature sensor 60 are controlled so that the temperature difference value? T after the second predetermined time period is reduced to the same level as that during normal drying, The temperature difference value? T is calculated by a calculation formula in which a correction value of a predetermined size is subtracted from the temperature difference (Tc-Tt) of the two temperature sensors (62).

? T = (Tc-Tt-5) 3

The temperature difference value? T between the first temperature sensor 60 and the second temperature sensor 62 can be calculated from the temperature sensed value Tc of the second temperature sensor 62 as shown in Equation (2) The positive constant is subtracted from the value obtained by subtracting the temperature sensed value Tt of the first temperature sensor 60, and then multiplication is performed by a predetermined multiplier.

The constant is a value subtracted from the temperature difference Tc-Tt such that a temperature difference value? T between the first temperature sensor 60 and the second temperature sensor 62 becomes smaller, The value is calculated as a small value by a certain level.

Therefore, the temperature difference value? T calculated in the continuous drying by the correction value is corrected to a level similar to the temperature difference value? T calculated in the general drying.

The correction value is an experimental value measured according to the drying and washing machine 1 of the present invention so that the performance, shape and installation conditions of the components related to the drying operation of the laundry such as the drying means, the tub 8 and the drum 12 The present invention is not limited thereto.

The multiplier is an integer that is multiplied so that the temperature difference value? T between the first temperature sensor 60 and the second temperature sensor 62 is amplified. The first temperature sensor 60 and the second temperature sensor 62 The temperature difference value? T is increased at a constant rate by a multiplier, thereby improving the sensitivity to the temperature difference value? T.

Meanwhile, in the present embodiment, the constants and multipliers are set to '5' and '3', respectively, and the second set time is set to '5 minutes' in the same manner as general drying.

When the calculated temperature difference value? T reaches the set value? T, the amount of the laundry is detected from the drying time in which the hot air drying is performed, and the time for further performing the hot air drying depending on the amount of the laundry (Refer to S23 and S24)

That is, as in the general drying, the set value? T is a predetermined value according to the drying course of the laundry, and the table in which the hot air drying additional time is set according to the drying time is stored in the controller 26, The additional time of hot air drying is calculated from the table.

When the hot air drying additional time is calculated, the hot air drying is further performed until the hot air drying time is further added, the cold air drying is performed for a predetermined time, and the continuous drying step is completed (see S25 and S26).

The cold air drying is performed for the purpose of preventing the risk of burning due to the high temperature of the laundry when the laundry is drawn out from the drying and combining drum washing machine 1, Only the blower 44 is driven for a certain period of time, and the temperature of the laundry dried by the low-temperature cold air supplied from the drying duct 40 is lowered.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of course, this is possible.

That is, the first temperature sensor may be installed at a lower portion of the condensing duct in addition to the tub to sense a temperature change of the cooling water and the condensed water in the condensing duct.

The constants and multipliers of the above equations are obtained experimentally according to the design conditions and the operating conditions of the washing and drying machine, and various values are applicable.

The drying method of the washing and drying machine according to the present invention having the above-described structure is characterized in that it is determined whether the drying is continuous drying in which drying is continuously performed after the previous drying stroke is completed at the beginning of drying, Since the temperature difference of the duct is corrected, the laundry is dried by the optimum drying method according to the continuous drying and the general drying, and the drying performance and the power consumption are optimized.

Further, since the laundry is automatically controlled by the continuous drying temperature sensor as well as the general drying, the laundry is hot-air dried only for a proper time, so that overdrying and thermal damage of the laundry are prevented during continuous drying, There is an effect that excessive increase is prevented.

Claims (7)

The drying time of the laundry is determined according to the temperature difference between the tub and the condensing duct measured according to the drying time and the time for performing the hot air drying according to the laundry amount is set, In this case, And a step of determining whether the drying is continuous drying in which the drying is continuously performed after the end of the previous drying step at the beginning of drying is performed to determine whether the drying is continuous drying or general drying and then the temperature difference between the turbine and the condensing duct is corrected differently, And drying the washing machine. The method according to claim 1, In the determination of the continuous drying and the general drying, it is determined that the drying is determined to be continuous drying if any one of the temperature sensed values of the turbine and the condensing duct is higher than the set temperature after the hot air drying is performed for the set time, And drying the washing machine. A first stage in which hot air drying is performed and the temperature of the turbine and the condensing duct is sensed; A second step of determining whether the drying of the hot air is performed for a first predetermined time and the temperature sensed value of the turbine and the condensed duct to be continuous drying if the temperature is higher than a predetermined temperature, A third step in which the temperature sensed value of the turbine and the condensed duct is subtracted after the hot air drying is performed for a second predetermined time period to calculate a temperature difference; A fourth step of correcting the correction value to the temperature difference of the third step if it is determined to be continuous drying in the second step; If the temperature difference between the calibrated turbine and the condensing duct is equal to or higher than a predetermined value, an additional time for hot air drying is calculated according to the drying time; And a sixth step in which the hot air drying is performed for the additional hot air drying time and the cold air drying is continued for a predetermined time period. The method of claim 3, Wherein the first set time is set to 1 minute, and the set temperature is set to 40 ° C. The method according to claim 3 or 4, Wherein in the fourth step, a correction value is subtracted from a temperature difference between the turbine and the condensing duct so that a temperature difference between the turbine and the condensing duct is largely detected due to a previous drying cycle. The method of claim 5, Wherein the correction value is set to 5 캜. The method of claim 6, Wherein the time for further performing the hot air drying from the predetermined table according to the corrected temperature difference and the drying time of the turbine and the condensing duct is calculated in the fifth step.

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