KR101939290B1 - drying machine and method for controllig drying process of drying machine - Google Patents

Abstract

Comparing a temperature inside the tub with a predetermined reference temperature; And driving the fan only during a temperature compensation time when the temperature inside the tub is equal to or higher than the reference temperature and simultaneously driving the heater and the fan when the temperature inside the tub is lower than the reference temperature. The drying stroke control method of the dryer can prevent the dryer from being overheated, thereby preventing the drying component from being damaged and preventing the laundry from being damaged by the high temperature.

Description

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

The present invention relates to a drying cycle control method for a dryer, and more particularly, to a drying cycle control method of a dryer for drying a drum using heat inside a drum when the temperature inside the drum is equal to or higher than a predetermined reference temperature.

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.

Particularly, in the drum type washing machine for inputting laundry from the front side, washing water, washing water and laundry are put into the drum and then laundry water or detergent is supplied to the inside of the tub. The damage of the laundry is small, and the washing effect can be obtained without rubbing the laundry.

In recent years, the use of a dryer capable of performing not only washing and dewatering functions of laundry but also drying function of laundry is increasing. That is, a separate drying device is provided inside the dryer, so that if the contamination of the laundry is removed through washing, rinsing, or dewatering, the laundry is dried to an appropriate level by the drying device.

The drying apparatus includes a drying duct having a blower and a drying heater. The hot air dried by the drying duct is supplied to the inside of the tub to dry the laundry contained in the drum in the tub.

In recent years, a drum-type dryer capable of drying a large volume in a short time has been attracting attention, in addition to a device that combines washing and drying.

The dryer usually performs drying by a manual drying method in which a user selects a desired drying course and sets a proper drying time according to the amount of laundry to perform a drying stroke.

However, such a manual drying method has a problem that the heater and the fan are operated during the drying time set by the user, so that the laundry is not completely dried due to the inadequate drying stroke in the dryer, or the inside of the dryer is overheated, there is a problem. Further, the heater is driven more than necessary, resulting in unnecessary energy loss.

It is an object of the present invention to provide a drying control method of a dryer capable of increasing the energy efficiency and preventing the components of the dryer from being damaged by high temperature by controlling the operation of the heater and the fan according to the state of the inside of the dryer, .

The drying cycle control method of the dryer of the present invention comprises the steps of: measuring the temperature inside the tub; Comparing a temperature inside the tub with a predetermined reference temperature; And driving the fan only during the temperature compensation time if the temperature inside the tub is higher than or equal to the reference temperature and driving the heater and the fan simultaneously when the temperature inside the tub is lower than the reference temperature .

The step of measuring the temperature may use a value sensed by a temperature sensor inside the tub.

Wherein the step of measuring the temperature includes the steps of measuring an elapsed time from completion of the preceding drying cycle of the dryer; And based on the elapsed time and the temperature reduction rate per hour after the preceding drying step.

The temperature compensation time may be set to a time required for the temperature inside the drum to converge to a temperature within a predetermined range from a temperature of the laundry in the drum.

The reference temperature may be set in the range of 40 占 폚 to 55 占 폚.

Measuring the temperature inside the tub again after driving the fan only; Comparing a temperature inside the tub with a predetermined reference temperature; And driving the fan only during the temperature compensation time when the temperature inside the tub is equal to or higher than the reference temperature and driving the heater and the fan simultaneously when the temperature inside the tub is lower than the reference temperature.

Meanwhile, after the step of driving only the fan, the step of simultaneously driving the heater and the fan may be performed.

According to another aspect of the present invention, there is provided a dryer including: a tub in which laundry is received; A heater for applying heat to the air; A fan for supplying the heated air into the tub; And a controller for driving only the fan during the temperature compensation time when the temperature inside the tub is higher than or equal to a predetermined reference temperature and controlling the heater and the fan to be driven simultaneously when the temperature inside the tub is lower than the reference temperature .

The controller may further include a temperature sensor for sensing a temperature inside the tub and transmitting the temperature inside the tub to the controller.

The controller may calculate the temperature inside the tub based on the elapsed time from the completion of the preceding drying cycle of the dryer and the temperature decrease rate per hour after the preceding drying cycle.

The temperature compensation time may be set to a time required for the temperature inside the drum to converge to a temperature within a predetermined range from a temperature of the laundry in the drum.

The reference temperature may be set in the range of 40 占 폚 to 55 占 폚.

Wherein the control unit measures the temperature inside the tub again after driving only the fan during the temperature compensation time and drives the fan only during the temperature compensation time when the temperature inside the tub is equal to or higher than a predetermined reference temperature, If the temperature inside the tub is lower than the reference temperature, the heater and the fan may be simultaneously driven.

Meanwhile, the controller may drive the heater and the fan at the same time after driving only the fan during the temperature compensation time.

The drying stroke control method of the dryer of the present invention can prevent the dryer from being overheated, thereby preventing the drying parts from being damaged and preventing the laundry from being damaged by the high temperature.

Further, by utilizing the heat remaining in the dryer in the drying process, the energy efficiency of the dryer can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing an embodiment of a dryer used in the dryer control method of the present invention. Fig.
2 is a flowchart showing one embodiment of a drying stroke control method of a dryer of the present invention.
3 is a flowchart showing another embodiment of a drying stroke control method of the dryer of the present invention.
4 is a graph showing a change in temperature during a drying cycle according to the drying cycle control method of the dryer of the present invention.

Hereinafter, a method of controlling the drying cycle of the dryer of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a view showing a drying and washing machine 1 as one embodiment of a dryer to which the drying stroke control method of the present invention is applied. The dryer 1 includes a cabinet 2 for forming an outer appearance, A tub 8 provided so as to be able to be buffered by a member 4 and a damper 6; a drum 12 rotatably installed in the tub 8 and provided with a plurality of through holes 10; A driving motor 14 installed on the rear side of the tub 8 so as to rotate the drum 12 and a lifter installed on the inner side of the drum 12 to be dropped by gravity after the laundry is pushed up to a predetermined height 16).

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 control panel 24 formed with a display unit for indicating the operating state of the washing and drying machine 1 and an operation unit for operating the washing and drying machine 1 is installed on the cabinet cover 18, Respectively.

A water supply valve 26 for supplying washing water and detergent to the inside of the tub 8 is connected to a water supply hose 28 and a detergent supply device 30 at an upper side of the tub 8, A drain pump 32 for discharging washing water accommodated in the tub 8 to the outside is connected to a drain hose 34 at a lower side of the tub 8.

On the other hand, a drying device 38 is installed on the outer side of the tub 8 so that the laundry introduced into the drum 12 can be dried by hot hot air.

The drying device 38 includes a drying duct 40 for discharging dry hot air into the tub 8 and a drying duct 40 connected to the drying duct 40 and the tub 8, And a condensing duct 50 for condensing the air circulated in the circulating air to remove moisture in the circulating air.

The drying duct 40 is disposed on the upper side of the tub 8 in a back and forth direction. The front part of the drying duct 40 is communicated with the upper part of the front surface of the tub 8, (44).

The drying heater 42 functions to heat the low temperature and low humidity air introduced from the condensing duct 50 into the high temperature and low humidity air, and the fan 44 functions to heat 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.

A control unit (not shown) inputs commands inputted through the control panel 24 and inputs information on the internal state of the dry-type washing and drying machine 1 (for example, the temperature inside the tub, And controls the driving of the drying heater 42 and the fan 44 so that an appropriate drying process is performed. A specific control method of the control unit will be described with reference to a control method to be described later.

A temperature sensor 60 is provided to detect the internal state of the tub 8. The temperature sensor 60 shown in FIG. 1 is located at a lower portion of the tub 8, but is not limited thereto. The temperature sensor 60 can be installed by changing the temperature of the inside of the tub 8 if the temperature can be measured.

Generally, since the high-temperature fluid moves upward, the temperature measured increases as the position of the temperature sensor 60 goes up. The average temperature of the inside of the tub 8 can be measured when the temperature sensor 60 is located in the middle of the tub 8 and the temperature sensor 60 is located at the top of the tub 8 The maximum temperature of the tub 8 can be measured.

FIG. 1 shows a drying and washing machine for performing both washing and drying. However, the drying cycle of the present invention includes a drying cycle of a drying-only dryer in addition to a drying-type washing machine. In the case of drying only, most of the constitution for drying except for the water supply structure for the washing cycle is similar to the drying and washing apparatus of Fig. 1, so a detailed description thereof will be omitted.

2 is a flowchart showing an embodiment of a drying-stroke control method of a dryer.

First, the temperature inside the tub 8 is measured (S100). The tub 8 is a space in which laundry is received and hot air is supplied to perform the drying process. In order to measure the temperature inside the tub 8, Measurement method can be used.

Alternatively, a method of calculating the temperature inside the tub 8 without measuring the temperature of the temperature sensor 60 may be used. The elapsed time from the completion of the preceding drying cycle of the dryer can be measured and can be calculated based on the elapsed time and the temperature reduction rate per hour after the preceding drying cycle. This is a method of assuming and calculating continuous drying that continuously performs a drying stroke.

After the internal temperature of the tub 8 is measured (S100), it is determined whether the temperature inside the tub 8 is higher or lower than the reference temperature (S200). The reference temperature refers to a temperature at which a stable drying process can be performed without any difficulty in the durability of the dryer even if the dryer performs a normal drying process. For example, the reference temperature may be in the range of about 40 ° C to 60 ° C .

When the continuous drying is performed, the internal temperature of the tub may be increased. The continuous drying is performed by repeating the drying step by using the same tub 8 so that the temperature inside the tub 8 can be remarkably higher than the room temperature immediately after the previous drying step. Or if the temperature outside the tub 8 is high, the temperature inside the tub 8 may also be high.

When the temperature inside the tub 8 is higher than the reference temperature, the temperature inside the tub 8 can rise above a temperature reached in a normal drying stroke by performing a normal drying stroke, The durability of the internal parts of the dryer may be influenced, and the laundry may be damaged due to high temperature heat applied to the laundry.

Also, from the viewpoint of energy saving, heating the already-high-temperature tub 8 again is undesirable because heat is dissipated to the outside. Therefore, when the temperature inside the tub 8 is higher than a certain level, Can be utilized. That is, when the temperature inside the tub 8 is equal to or higher than the reference temperature, unnecessary energy waste can be prevented by using the heat of the tub 8.

Also, the temperature inside the tub 8 is high, and the temperature of the newly introduced laundry is relatively low, so that a temperature difference occurs between the tub 8 and the laundry. When the dryer is controlled by measuring the temperature, the temperature of the tub 8 is measured instead of measuring the temperature of the laundry, so that the temperature of the laundry does not rise to a temperature required for actual drying, .

That is, when the inside of the tub 8 is at a high temperature higher than the reference temperature, the heat energy is utilized to save energy and the internal temperature is lowered so as not to affect the durability of the dryer, 8) so that the drying stroke can be performed properly.

In order to solve the above problem, when the temperature inside the tub 8 is equal to or higher than the reference temperature, only the fan 44 is driven during the temperature compensation time (S300).

The temperature compensation time refers to a time until the laundry and the reference temperature are thermally equilibrated to a certain level. The temperature compensation time may vary depending on the reference temperature, the performance of the fan 44, the size of the tub 8, have.

4 is a graph showing changes in temperature during a drying cycle according to the drying cycle control method of the dryer of the present invention. Referring to FIG. 4, the temperature of the tub 8, the temperature of a duct as a circulation passage of the air in the tub 8, and the temperature of the laundry are shown at the time of performing the drying process according to the present embodiment. Since the tub 8 and the duct are connected, the temperature is changed similarly.

If the reference temperature is 50 캜, the temperature inside the tub 8 shown in Fig. 4 is higher than the reference temperature, so only the fan 44 is driven. When only the fan 44 is driven, drying is performed by raising the temperature of the laundry by the heated air in the tub 8 and the duct. When about 10 minutes have elapsed on the graph of FIG. 4, the laundry and the inside of the tub 8 The amount of change in temperature of the air-fuel mixture is almost zero.

That is, the temperature difference between the inside of the tub 8 and the temperature of the laundry converges to a predetermined range, and the tub 8 and the laundry are thermally balanced with each other. In this way, the time required for the temperature inside the drum to converge within a predetermined range from the temperature of the laundry in the drum (about 10 minutes in the embodiment shown in FIG. 4) is set as the temperature compensation time, Only the fan 44 can be driven.

Alternatively, the temperature compensation time may be set to a short time unit such as 30 seconds, 1 minute, or 2 minutes. In this case, it is necessary to measure the temperature inside the tub 8 again, which will be described later in detail.

It is determined whether or not the fan 44 has been driven for more than the temperature compensation time (S350), and only the fan 44 is driven during the temperature compensation time. If the driving time of the fan 44 exceeds the temperature compensation time In other words, the general drying cycle, that is, the fan 44 and the drying heater 42 are driven at the same time (S400) because the inside of the tub 8 and the laundry are thermally balanced.

When the temperature of the inside of the tub 8 is lower than the reference temperature, the drying heater 42 and the fan 44 are driven simultaneously (S400). When the temperature inside the tub 8 is lower than the reference temperature, the tub 8 is overheated and the possibility of occurrence of the above-mentioned problem is low, so a normal drying stroke is performed.

Next, referring to Fig. 3, a flowchart according to another embodiment of the drying stroke control method of the present invention is shown.

If the temperature inside the tub 8 is equal to or higher than the reference temperature, only the fan 44 is driven (S300). In this case, The fan 44 and the drying heater 42 are driven at the same time if the temperature inside the drying chamber 8 is lower than the reference temperature.

If the driving time of the fan 44 is longer than the temperature compensation time at step S360, the temperature inside the tub 8 is measured again at step S100. If the temperature of the inside of the tub 8 exceeds the reference temperature (S200).

As described above, when the temperature compensation time is set to be as short as 30 seconds and 1 minute, it is judged whether or not the temperature inside the tub 8 has dropped below the reference temperature, so that more accurate control is possible.

Both of the embodiment of FIG. 2 and the embodiment of FIG. 3 are applicable when the temperature compensation time is set to a time required for the temperature inside the drum to be converged within a predetermined range from the temperature of the laundry in the drum Do.

As described above, the drying stroke control method of the dryer of the present invention prevents the dryer from being overheated, thereby preventing the parts of the dryer from being damaged, and preventing the laundry from being damaged by the high temperature.

Further, by utilizing the heat remaining in the dryer in the drying process, the energy efficiency of the dryer can be increased.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments but should be determined according to the claims.

1: dryer 2: cabinet
8: tub 12: drum
14: drive motor 24:
40: Drying duct
42: drying heater 44: fan
50: condensing duct 60: temperature sensor

Claims (14)

A drying control method of a dryer for performing a continuous drying process including a preliminary drying cycle and a trailing drying cycle performed after completion of the preceding drying cycle,
The trailing drying stroke
Measuring a temperature inside the tub by using a temperature sensor provided in the tub while the driving of the drying heater is stopped;
Comparing a temperature inside the tub with a predetermined reference temperature;
Simultaneously driving the drying heater and the fan; And
And driving only the fan among the drying heater and the fan,
If the temperature inside the tub is lower than the reference temperature, simultaneously driving the drying heater and the fan is performed,
The temperature difference between the inside of the tub and the laundry introduced into the tub after completion of the preceding drying stroke is a time required for the temperature difference to converge within a predetermined range when the temperature inside the tub is higher than or equal to the reference temperature, And simultaneously driving the drying heater and the fan only when the temperature inside the tub is lower than the reference temperature after the temperature compensation time has elapsed. The drying stroke control method of the dryer.
delete The method according to claim 1,
The step of measuring the temperature
And measuring the elapsed time from when the preceding drying cycle of the dryer is completed,
The temperature inside the tub is
Wherein the drying time is calculated based on an elapsed time measured in the elapsing time measuring step and a temperature decreasing rate per hour after the preceding drying step. delete The method according to claim 1,
The reference temperature,
Wherein the drying time is set in a range of 40 占 폚 to 55 占 폚. The method according to claim 1,
Wherein when the temperature inside the tub is higher than or equal to the reference temperature after the lapse of the temperature compensation time, driving of only the fan among the drying heater and the fan is performed again during the newly set temperature compensation time. The method comprising:
delete A tub in which laundry is received;
A dry heater for applying heat to the air;
A fan for supplying the heated air into the tub; And
A controller for controlling the drying heater and the fan;
And a temperature sensor for sensing a temperature inside the tub and transmitting temperature information of the inside of the tub to the controller,
The control unit may be configured to perform a post-drying operation
The temperature of the inside of the tub is measured through the temperature sensor in a state in which the driving of the drying heater is stopped,
Wherein when the temperature inside the tub is lower than a predetermined reference temperature, the drying heater and the fan are simultaneously driven,
The temperature of the inside of the tub is higher than or equal to the predetermined reference temperature, and the drying time during the temperature compensation time, which is a time required for the temperature difference between the laundry introduced into the tub to converge within a predetermined range, The control unit controls the fan to operate only the fan among the heaters and the fans. After the fan of the drying heater and the fan is driven only during the temperature compensation time, temperature information of the inside of the tub is provided again. If the temperature inside the tub is lower than the reference temperature Wherein the drying heater and the fan are simultaneously driven.
delete 9. The method of claim 8,
Wherein,
Wherein the temperature of the inside of the tub is calculated on the basis of an elapsed time measured from the completion of the preceding drying cycle of the dryer and a temperature reduction rate per hour after the preceding drying cycle. delete 9. The method of claim 8,
The reference temperature,
Is set in the range of 40 占 폚 to 55 占 폚. 9. The method of claim 8,
The control unit
And controls only the fan during the temperature compensation time newly set when the temperature inside the tub is higher than or equal to a predetermined reference temperature after driving only the fan among the drying heater and the fan during the temperature compensation time. .
delete

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