KR20070015280A - Drying method of drying and washing machine - Google Patents

Abstract

A drying method of a combination washing and drying machine is provided to optimize a function and electricity consumption for drying the laundry continuously or generally by judging continuous or general drying after finishing an initial drying step. A drying method of a combination washing and drying machine comprises the steps for judging whether a continuous drying step is performed after finishing an initial drying step; and compensating a temperature difference between a tub(8) and a condensing duct(50) according as the continuous drying step or a general drying step is performed. In the judging step, if one of the temperatures of the tub and the condensing duct is over a set value after drying the laundry with hot wind for a set time, it is judged as the continuous drying step. Otherwise, it is judged as the general drying step.

Description

Drying method of drying and washing machine

1 is a cross-sectional view showing the internal configuration of a dry-use drum washing machine according to the present invention,

Figure 2 is a flow chart illustrating a drying method of the combined drying drum washing machine according to the present invention,

3 is a flow chart showing a drying method for the general drying of FIG.

4 is a flow chart illustrating a drying method for continuous drying of FIG.

5a is a graph showing a drying time and a temperature detection value of a combined washing machine according to the present invention;

Figure 5b is a graph showing the drying time and the temperature difference value of the combined dry washing machine according to the present invention,

<Explanation of symbols on main parts of the drawings>

1: dry drum washing machine 2: cabinet

8: Tub 12: Drum

14: motor 26: control unit

38: boil heater 40: drying duct

42: drying heater 44: blower

50: condensation 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 condensation duct Δt: Temperature difference

The present invention relates to a drying method of a combined-use washing machine, and in particular, to determine whether the drying is carried out continuously after the previous drying administration is finished at the beginning of drying, and the drying method is optimized according to continuous drying and general drying. It relates to a drying method of the combined dry washing machine that can proceed.

In general, a washing machine is a device that washes laundry through a process such as washing, rinsing, and dehydrating to remove contamination from clothes, bedding, etc. (hereinafter referred to as 'laundry') using water, detergent, and mechanical action. to be.

In particular, in recent years, the use of a combined washing machine that can perform not only washing and dehydrating functions of laundry but also drying function of laundry is increased, and the combined-use washing machine is used to prevent contamination of laundry through a process of washing, rinsing, and dehydration. After removal, the laundry is dried to an appropriate level through a drying process.

In the drying process of such a combined washing machine, dry hot air is supplied to the inside of the tub by a drying duct provided with a blower and a heater, and the laundry in the tub is dried, and the humid air drying the laundry is condensed by a condensation duct. Circulated to the drying duct.

On the other hand, the drying method of the combined-use washing machine is a drying method according to the manual drying method that the drying proceeds to the drying time set by the drying course set by the user, and the amount of laundry detected by the drying course set by the user and the combined-use washing machine There is an automatic drying method.

In the manual drying method as described above, the possibility of over-drying or undrying is high depending on the amount of laundry, and thus, the recent dry washing machine has a trend of drying laundry by an automatic drying method.

Therefore, in the combined washing machine, a temperature sensor is installed in the tub and the condensation duct so that the amount of laundry can be detected by the internal temperature of the tub and the condensation duct.

That is, the drying washing machine is a temperature sensor detects the internal temperature of the tub and the condensation duct as the drying operation proceeds, and if the difference between the temperature detection value is more than the set value, the amount of laundry according to the drying time It is calculated and drying is performed according to the quantity of the laundry.

Typically, since the temperature detection value of the condensation duct is formed higher than the temperature detection value of the tub, the temperature difference between the condensation duct and the tub is a value obtained by subtracting the temperature detection value of the tub from the temperature detection value of the condensation duct.

However, in the drying method of the combined-use washing machine according to the prior art, the amount of laundry is calculated according to the temperature difference between the tub and the condensation duct, but the internal temperature of the tub is increased when the next drying stroke is performed immediately after one drying stroke is completed. Since it is already up to a predetermined level at the beginning of drying, the temperature detection values of the tub and the condensation duct are abnormally detected, and thus the drying stroke of the combined-use washing machine is abnormally operated.

That is, when the laundry dried by the combined washing machine is dried again or when another laundry is further dried while the drying stroke of the combined washing machine is completed, the tub is already heated during the previous drying stroke. The temperature sensing value detected by the temperature sensor of the tub and the condensation duct is sensed very high, especially the temperature difference between the tub and the condensation duct is sensed above the set value because the temperature of the condensation duct is relatively higher than the tub.

Therefore, since the temperature difference between the tub and the condensation duct is already greater than or equal to a predetermined value at the beginning of drying, even when the laundry is dried by a predetermined limit drying time of the combined-use washing machine, the time point at which the temperature difference between the tub and the condensation duct is greater than or equal to the predetermined value is not detected. Therefore, there is a problem that automatic drying according to the amount of the laundry is impossible.

When the laundry is forcibly terminated after drying to a predetermined limit drying time as described above, there is a problem in that over-drying of the laundry and damage to the cloth are generated, and power consumption is unnecessarily increased.

The present invention has been made to solve the above problems, an object of the present invention by providing a step of determining whether the continuous drying or continuous drying is carried out continuously after the previous drying administration at the beginning of drying, The present invention provides a drying method of a combined washing machine in which laundry drying performance and power consumption can be optimized according to continuous drying and general drying.

According to the present invention for realizing the above object, the amount of laundry is detected according to the temperature difference between the tub and the condensation duct measured according to the drying time, and the time for performing hot air drying is set according to the amount of laundry. In the drying method of a combined washing machine in which drying proceeds, a step of determining whether the drying is performed continuously after the previous drying administration is finished at the beginning of drying is carried out. Characterized in that the temperature difference is corrected.

In the step of determining the continuous drying and general drying, if hot air drying is performed for a predetermined time, if any one of the temperature detection values of the tub and the condensation duct is higher than the set temperature, it is determined as continuous drying or normal drying.

On the other hand, the drying method of the combined-use washing machine according to the present invention comprises the first step of performing hot air drying and sensing the temperature of the tub and the condensation duct, and after the hot air drying is performed for the first set time, the tub and the condensation duct If any one of the temperature detection value is above the set temperature, the second step is judged to be continuous drying or normal drying, and the temperature detection value of the tub and the condensation duct is subtracted after the hot air drying is performed for the second setting time. The third step of calculating the temperature difference, the fourth step of correcting the correction value to the temperature difference of the third step if the continuous drying is determined in the second step, and the temperature difference between the corrected tub and the condensation duct The fifth step of calculating the additional time of the hot air drying according to the drying time, and after the hot air drying is performed during the hot air drying additional time, the cold air drying is performed for a predetermined time 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, a correction value is subtracted from the temperature difference between the tub and the condensation duct so that the temperature difference between the tub and the condensation duct is largely sensed due to the previous drying stroke.

The correction value is set at 5 ° C.

In the fifth step, a time for additionally performing the hot air drying is calculated from a predetermined table according to the corrected temperature difference and drying time of the tub and the condensation duct.

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

1 is a cross-sectional view showing the internal configuration of a dry-use drum washing machine according to the present invention.

Drying drum washing machine according to the present invention, as shown in Figure 1, the cabinet 2 to form an appearance, and the buffer member so as to be buffered by the elastic member 4 and the damper 6 inside the cabinet (2) A tub (8) installed, a drum (12) rotatably installed in the tub (8) and having a plurality of through holes (10), and a rear of the tub (8) so that the drum (12) is rotationally driven. It comprises a drive motor 14 installed in, and a lifter 16 is installed on the inner surface of the drum 12 so that the laundry can be dropped by gravity after being pumped up to a certain height.

A cabinet cover 18 having a laundry entrance 18A is mounted on a front surface of the cabinet 2, and a door 20 that opens and closes the laundry entrance 18A is rotatably installed on the cabinet cover 18. A gasket 22 is installed between the laundry entrance 18A and the tub 8 to alleviate the impact of the drum 12 by rotating the drum 12 and to prevent the washing water from overflowing to the outside.

On the upper side of the cabinet cover 18 as described above, a display unit for displaying the operation state of the combined-use drum washing machine 1 is formed, and a control panel 24 having an operation unit for operating the operation of the combined-use drum washing machine 1 is formed. ) Is mounted, and a control unit 26 for controlling the operation of the combined-use drum washing machine 1 is installed in the cabinet 2 so as to be capable of transmitting signals to the control panel 24.

The upper side of the tub (8) is installed in communication with the water supply valve 28, the water supply hose 30 and the detergent supply device 32 for supplying the wash water and detergent to the inside of the tub (8), the tub ( At the lower side of 8), a drain pump 34 and a drain hose 36 for discharging the wash water accommodated in the tub 8 to the outside are in communication with each other.

On the other hand, the drying drum washing machine 1 is a boiled heater 38 is installed on the inner lower portion of the tub 8 so that the wash water accommodated in the tub 8 is heated to wash the laundry boiled, Drying means are provided on the upper side and the rear side of the tub 8 so that the laundry introduced into the drum 12 may be dried by dry hot air.

The drying means is connected to the drying duct 40 and the drying duct 40 and the tub 8 to discharge the dry hot air into the tub (8) from the tub (8) to the drying duct (40) It consists of a condensation duct 50 to condense circulated air to remove moisture.

Here, the drying duct 40 is disposed long in the front-rear direction on the upper side of the tub 8, the front portion is connected in communication with the upper portion of the front of the tub 8, the drying heater 42 and the blower therein 44 is installed.

The drying heater 42 serves to heat the low temperature and low humidity air introduced from the condensation duct 50 to the high temperature and low humidity air, and the blower 44 condenses the air condensed from the condensation duct 50. In addition to the suction and blows the air heated by the drying heater 42 to the tub (8).

In addition, the condensation duct 50 is disposed in the vertical direction in the rear side of the tub 8, the upper end is connected to the rear end of the drying duct 40 and the lower end of the tub 8 It is connected in communication with the bottom of the rear, there is provided a cooling water supply mechanism 52 for condensing the humid air introduced from the tub (8).

The control means 26 is provided in the drying means and the tub 8 so that the operation of the drying heater 42, the blower 44, the boil heater 38, and the like can be smoothly controlled by the control unit 26. A plurality of temperature sensors connected with are installed.

That is, the first temperature sensor 60 for detecting the internal temperature of the tub 8 is installed below the tub 8, and the condensation duct 50 is condensed by the cooling water supply mechanism 52. A second temperature sensor 62 is installed to sense the temperature of the air, and a third temperature sensor 64 is installed on the drying duct 40 to sense the temperature of the air heated by the drying heater 42. .

The first temperature sensor 60 detects the temperature of the wash water heated by the boil heater 38 when washing the boil, and detects the air temperature in the tub 8 when drying.

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

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

Looking at the operation and control method of a dry-use washing machine according to the present invention configured as described above are as follows.

Figure 2 is a flow chart illustrating a drying method of a combined drum washing machine according to the present invention, Figure 3 is a flow chart showing a drying method for the general drying of Figure 2, Figure 4 is a drying method for the continuous drying of Figure 2 This is a flow chart shown, Figure 5a is a graph showing the drying time and temperature detection value of the combined-use washing machine according to the present invention, and 5b is a graph showing the drying time and the temperature difference value of the combined-use washing machine according to the present invention to be.

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

Here, the drum 12 into which the laundry is introduced by the driving motor 16 is rotated forward and reverse, and washing of the laundry proceeds. When the washing stroke of the laundry is completed, the drain pump 34 and the drain hose 36 are completed. The wash water is drained to the outside.

After the wash water is supplied again to the inside of the tub 8, the drum 12 is rotated forward and reverse, and rinsing the laundry proceeds. When the rinsing stroke of the laundry is completed, the wash water used for the rinsing is finished. Drained again

When the boil heater 38 is operated at the time of washing and rinsing the laundry as described above, the washing water accommodated in the tub 8 is heated to a high temperature to wash the laundry.

At this time, the temperature of the wash water heated by the boil heater 38 is detected by the first temperature sensor 60, the boil heater 38 in accordance with the temperature detection value of the first temperature sensor 60 The operation of is appropriately controlled by the control unit 26 so that the wash water is heated to an appropriate temperature.

When the rinsing cycle is repeated several times, the drum 12 is rotated at a high speed while the water contained in the laundry is dehydrated by 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, and the drum 12 rotates at a low speed to wash the dehydrated laundry. It is dried.

At this time, the hot air supplied into the tub 8 by the drying duct 40 flows to the laundry dehydrated through the through hole 10 of the drum 12, and the laundry is stirred by the drum 12. While the water is evaporated while contacting the hot air, the humid air containing a large amount of water exits the through-hole 10 of the drum 12 and flows into the condensation duct 50.

The wet air introduced into the condensation duct 50 contacts the cooling water flowing down by the cooling water supply mechanism 52 to condense moisture, and the air condensed in the condensation duct 50 flows into the drying duct 40. After being heated, the drying heater 42 is heated.

As the cycle of the air is circulated repeatedly, 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 condensation duct 50 is sensed by the second temperature sensor 62, 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 value of 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 to prevent overheating of the drying heater 42 and thermal damage of the laundry is prevented. The control unit 26 controls the on / off.

In addition, when the temperature detection value of the first temperature sensor 60 and the second temperature sensor 62 is transmitted to the control unit 26, the control unit 26 determines the amount of laundry according to the difference of the temperature detection value. After sensing, the optimum drying method for the laundry is set according to the quantity, the drying course and the drying time, and the combined-use drum washing machine 1 is operated according to the drying method set by the controller 26.

On the other hand, with reference to Figures 2 to 5a and 5b drying method of the combined dry washing machine according to the invention as follows.

First, as shown in FIG. 2, hot air dried by the drying duct 40 is supplied to the tub 8 to perform washing and dehydration of the laundry, and the first temperature sensor 60 and the first temperature sensor 60 are dried. The internal temperature Tt (Tc) of the tub 8 and the condensation duct 50 is detected by the temperature sensor 62. (See S1, S2)

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

When the hot air drying as described above is performed during the first setting time, the continuous temperature and general drying are compared by comparing the temperature sensing values Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62 with the set temperature. Drying is to be determined. (See S3, S4, S5, S6)

Here, if both the temperature detection value (Tt) (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is determined to be less than the set temperature, the drying process is the washing, rinsing, dehydration of the laundry proceeds It will be judged as general drying carried out afterwards, or after a sufficient time has elapsed since the previous drying administration.

In this general drying, since the internal temperature of the tub 8 is not increased due to the previous drying stroke, the temperature sensing value Tt of the first temperature sensor 60 and the second temperature sensor 62 is not generated. Tc is normally detected and drying of the laundry is normally performed.

On the other hand, if any one of the temperature sensing value Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is higher than the set temperature, the drying stroke is continuous after the previous drying stroke is finished. It is judged as continuous drying in which drying proceeds.

Since the continuous drying is a state in which the internal temperature of the tub 8 is raised by a predetermined level or more due to the previous drying stroke, the temperature sensing value Tt of the first temperature sensor 60 and the second temperature sensor 62 is increased. (Tc) is abnormally elevated compared to normal 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 sensing value compared with the set temperature is sensed by the second temperature sensor 62. It will be described as limited to the internal temperature (Tt) of the condensation duct 50 has been.

That is, if the temperature sensing value Tc of the second temperature sensor 62 is less than 40 ° C. after the drying stroke is performed for one minute, the drying stroke is determined to be general drying, and the second temperature sensor 62 is used. If the temperature detection value Tc of 40 ° C. or more, the drying stroke is determined to be continuous drying.

Meanwhile, in the general drying method of the combined-use drum washing machine 1, hot air drying is performed until a second set time, and the first temperature sensor 60 and the second temperature sensor 62 are shown. The internal temperature (Tt) of the tub 8 and the condensed air temperature (Tc) of the condensation duct 50 are sensed by each (see S10, S11).

When the hot air drying is performed until the second set time as described above, the temperature difference Ta with respect to the temperature detection value Tt (Tc) at the second set time is calculated by a calculation formula, and the reference temperature difference is transmitted to the controller 26. It is set to Ta. (See S12, S13)

Then, as the hot air drying is performed after the second set time, a temperature difference Tb with respect to the temperature detection value Tt (Tc) after the second set time is calculated by a calculation formula, and the calculated temperature difference Tb. ) And the temperature difference value Δt with respect to the reference temperature difference Ta is calculated (see S14, 15).

Ta = (Tc-Tt + 30) × 3

Tb = (Tc-Tt + 30) × 3

Δt = Tb-Ta

As shown in Equation 1, the temperature difference Ta (Tb) with respect to the temperature detection value Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is the second temperature sensor. A positive constant is added to a value obtained by subtracting the temperature detection value Tt of the first temperature sensor 60 from the temperature detection value Tc of 62, and then multiplying by a predetermined multiplier.

The constant is a positive number that is added so that the difference between the temperature detection value Tt and Tc is not negative, and since the temperature difference value Δt is removed in the process of calculating the temperature difference value Δt 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, the temperature difference value Δt is obtained, so that the calculated temperature difference Tb and the reference temperature difference Ta are obtained. Constants added to each are removed from each other in the calculation.

The multiplier is an integer multiplied by the temperature difference Ta (Tb) between the first temperature sensor 60 and the second temperature sensor 62, and the first temperature sensor 60 and the second temperature sensor 62 are multiplied. ), The temperature difference Ta (Tb) is increased by a predetermined ratio by a multiplier, thereby improving sensitivity to the temperature difference value Δt.

In the present embodiment, the constant and the multiplier are set to '30' and '3', and the second set time will be described as limited to '5 minutes'.

When the temperature difference value Δt calculated as described above reaches the set value ΔT, the quantity of laundry is detected from the drying time up to the present when hot air drying is performed, and hot air drying is further performed according to the quantity of laundry. The calculated time is calculated (see S16 and S17).

As shown in Table 1, the set value ΔT is a preset value according to the drying course of the laundry, and a table in which hot air drying additional time is set according to the drying time is shown. It is pre-stored in the control unit 26 and used when calculating the additional time of the hot air drying.

That is, if the drying course is weak drying (Damp), the set value (ΔT) is '35', hot air drying additional time is set to '0' regardless of the drying time.

If the drying course is standard drying (Normal), the set value (ΔT) is '50', the hot air drying time is 12 minutes when the drying time is less than 100 minutes, hot air drying is added when the drying time is 100 minutes or more The time is set to the time when '88 minutes' is subtracted from the drying time.

If the drying course is strong drying, the set value ΔT is' 50 ', and when the drying time is less than 50 minutes, the hot air drying addition time is '22 minutes', and when the drying time is 50 minutes or more, hot air drying is added. The time is '22 minutes 'is added to the time when the' 0.7 'is increased after the '50 minutes' is subtracted from the drying time.

If the drying course is a low temperature drying (Less Temp), the set value (ΔT) is' 35 ', hot air drying additional time when the drying time is less than 60 minutes is '21 minutes', hot air drying when the drying time is more than 60 minutes The additional time is '21 minutes 'is added to the time when the' 0.6 'is increased after the '60 minutes' is subtracted from the drying time.

Particularly, when the drying temperature of the combined-use drum washing machine 1 is described in more detail with reference to the graphs shown in FIGS. 5A and 5B, the first temperature sensor 60 and the second temperature sensor are initially dried. The temperature detection value Tt (Tc) of 62 is converged and raised to a substantially similar value, and in the middle of drying, the temperature detection value Tt of the first temperature sensor 60 and the second temperature sensor 62 ( Tc) is maintained at a constant temperature band with almost the same value, and at the end of drying, the temperature sensing value Tt of the first temperature sensor 60 is lowered, while the temperature sensing value of the second temperature sensor 62 Tc is increased so that the temperature difference Ta (Tb) between the first temperature sensor 60 and the second temperature sensor 62 is greatly increased.

Here, the temperature detection value (Tt) (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is changed almost similarly in the initial drying period and the intermediate drying period, while the temperature detection value (Tt) Since Tc changes while having some ripple, the temperature difference Ta (Tb) with respect to the temperature sensing value Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62. ) Is likely to be negative.

As described above, the temperature difference Ta (Tb) of the temperature detection value Tt (Tc) is not negatively calculated at the beginning and the middle of drying, so that the formula having the predetermined size is used in the formula of the temperature difference Ta (Tb). The constant is added up. In addition, since the temperature difference value Δt with respect to the temperature difference Ta (Tb) of the first temperature sensor 60 and the second temperature sensor 62 is calculated to be very small, the formula of the temperature difference Ta (Tb) is calculated. Is multiplied by a multiplier having a predetermined size.

In addition, at the end of the drying, the temperature detection value Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is opened to increase the size of the temperature difference value Δt.

When the hot air drying addition time is calculated by the above method, hot air drying is further performed until the hot air drying addition time, and after the cold air drying is performed for a predetermined time, the general drying administration ends (see S18 and S19).

The cold air drying is carried out for the purpose of preventing the risk of burns due to the high temperature of the laundry when taking out the laundry dried from the combined-use drum washing machine 1, the operation of the drying heater 42 is stopped. In this state, only the blower 44 is driven for a predetermined time, so that the temperature of the laundry dried by the low temperature cold air supplied from the drying duct 40 is lowered.

In addition, in the continuous drying method of the combined-use drum washing machine 1, as shown in FIG. 4, hot air drying is performed until a second set time, and the first temperature sensor 60 and the second temperature sensor 62 are dried. The internal temperature (Tt) of the tub 8 and the condensed air temperature (Tc) of the condensation duct 50 are sensed by each (see S20, S21).

At this time, since the drying stroke of the combined-use drum washing machine 1 is in a state in which the next drying stroke proceeds immediately after the previous drying stroke is finished, the temperature of the tub 8 has already risen to a predetermined level at the beginning 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 compared to general drying, and in particular, the second temperature sensor ( The temperature detection value Tc of 62 is relatively larger than the temperature detection value Tt of the first temperature sensor 60.

When the hot air drying as described above is performed until the second set time, the temperature difference value Δt with respect to the temperature detection value Tt (Tc) of the first temperature sensor 60 and the second temperature sensor 62 is corrected. Calculated by the formula. (See S22)

That is, in continuous drying, since the temperature sensing value Tt (Tc) of the second temperature sensor 62 is larger than the first temperature sensor 60, the temperature difference value Δt is calculated by the formula used in general drying. ) Is calculated, the temperature difference Ta (Tb) between the first temperature sensor 60 and the second temperature sensor 62 is calculated so large that the temperature difference value Δt after the second set time is always It exceeds the set value (DELTA) T.

Therefore, in the continuous drying, the first temperature sensor 60 and the first temperature sensor 60 and the first temperature sensor 60 may be compared with the set value ΔT after the temperature difference value Δt after the second set time is reduced to the same level as that of normal drying. 2 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 temperature sensor 62.

Δt = (Tc-Tt-5) × 3

The temperature difference value Δt between the first temperature sensor 60 and the second temperature sensor 62 is equal to the temperature detected value Tc of the second temperature sensor 62 as shown in Equation 2. After the positive constant is subtracted from the value obtained by subtracting the temperature sensing value Tt of the first temperature sensor 60, the multiplication is performed by a predetermined multiplier.

The constant is a value subtracted from the temperature difference Tc-Tt such that the temperature difference value Δt between the first temperature sensor 60 and the second temperature sensor 62 becomes small, and the temperature difference value Δt is corrected. The value is calculated to be a small value.

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

The correction value is an experimental value measured according to the combined drum washing machine 1, and the performance, shape, and installation conditions of the drying means, the parts related to the drying operation of the laundry, such as the tub 8 and the drum 12, and the like. Of course, it can be changed in various ways.

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 multiplier of the first temperature sensor 60 and the second temperature sensor 62 The temperature difference value Δt is increased by a predetermined ratio by a multiplier, so that the sensitivity to the temperature difference value Δt is improved.

In the present embodiment, the constant and the multiplier are set to '5' and '3', respectively, and the second set time will be described as limited to being set to '5 minutes' as in general drying.

When the temperature difference value Δt calculated as described above reaches the set value ΔT, the quantity of laundry is detected from the drying time when the hot air drying is performed, and the time for which hot air drying is additionally performed according to the quantity of the laundry is performed. (S23, S24).

That is, as in the general drying, the set value ΔT is a preset value according to the drying course of the laundry, and a table in which a hot air drying additional time is set in accordance with the drying time is stored in the controller 26 and the The hot air drying addition time is calculated from the table.

Then, when the hot air drying addition time is calculated, hot air drying is further performed until the hot air drying addition time, and after the cold air drying is performed for a predetermined time, the continuous drying administration is ended (see S25 and S26).

The cold air drying is carried out for the purpose of preventing the risk of burns due to the high temperature of the laundry when taking out the laundry dried from the combined-use drum washing machine 1, the operation of the drying heater 42 is stopped. In this state, only the blower 44 is driven for a predetermined time, so that the temperature of the laundry dried by the low temperature cold air supplied from the drying duct 40 is lowered.

As described above, the drying method of the combined-use washing machine according to the present invention has been described with reference to the illustrated drawings. However, the present invention is not limited to the above-described embodiments and drawings, and various modifications are made by those skilled in the art within the technical scope of the present invention. Of course this is possible.

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

In addition, the constant and the multiplier of the above formula are obtained experimentally according to the design conditions and operating conditions of the combined-use washing machine, various values are applicable.

The drying method of the combined dry washing machine according to the present invention configured as described above has a step of determining whether continuous drying is performed continuously after the previous drying administration is finished at the beginning of drying, and the tub and condensation according to continuous drying and general drying. Since the temperature difference of the duct is corrected, laundry is dried by an optimal drying method according to continuous drying and general drying, and thus drying performance and power consumption are optimized.

In addition, since the drying is automatically controlled by a temperature sensor as well as the normal drying, the laundry is hot-air dried only for a proper time, so overdrying and heat damage of the laundry are prevented in advance, and the drying time Too much phenomenon is also prevented.

Claims (7)

Drying method of the washing machine combined with the tub and the condensation duct measured in accordance with the drying time, the amount of laundry is detected and the time for hot air drying is set in accordance with the amount of the laundry and drying the laundry during the set time To In the initial stage of drying, a step of determining whether continuous drying is performed continuously after the completion of the previous drying administration is carried out so that the temperature difference between the tub and the condensation duct is corrected according to continuous drying and general drying. Way. The method according to claim 1, In the step of determining the continuous drying and general drying, if hot air drying is performed for a set time, if any one of the temperature detection values of the tub and the condensation duct is higher than the set temperature, it is determined as continuous drying or otherwise it is determined as normal drying. Drying method of combined use washing machine to do. A first step of performing hot air drying and sensing a temperature of the tub and the condensation duct; After the hot air drying is performed for a first set time, if the one of the temperature detection values of the tub and the condensation duct is equal to or greater than the set temperature, the second step is determined to be continuous drying or normal drying; A third step of calculating a temperature difference by subtracting the temperature sensing values of the tub and the condensation duct after the hot air drying is performed for a second set time; A fourth step of correcting a correction value to the temperature difference of the third step if it is determined that the drying is continuous in the second step; A fifth step of calculating an additional time of hot air drying according to a drying time when the temperature difference between the corrected tub and the condensation duct is equal to or greater than a set value; Drying method of a combined washing machine comprising a sixth step in which the cold air drying is performed for a predetermined time after the hot air drying is performed for the hot air drying additional time. The method according to claim 3, The first set time is set to 1 minute, the set temperature is a drying method of a combined washing machine, characterized in that set to 40 ℃. The method according to claim 3 or 4, In the fourth step, the correction value is subtracted from the temperature difference between the tub and the condensation duct so that the temperature difference between the tub and the condensation duct is largely detected by the previous drying stroke. The method according to claim 5, The correction value is a drying method of a combined use washing machine, characterized in that set to 5 ° C. The method according to claim 6, In the fifth step, a time for additionally performing the hot air drying is calculated from a predetermined table according to the corrected temperature difference and drying time of the tub and the condensation duct.

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