KR101137333B1 - Control method of clothes drier - Google Patents

Abstract

The present invention relates to a drying control method of a condensation type clothes dryer to improve the drying performance for a small load, and is provided in the front of a drum having a humidity sensor for detecting the dryness by contact with clothes. A condensation type clothes dryer, comprising: driving a heater to perform a drying operation when a user inputs an operation command for a small load; Detecting a dryness degree (D) of a cloth at a time point when a first predetermined time elapses after entering the drying stroke; Determining whether the detected dryness level (D) is less than or equal to a preset value when a second preset time for the small load has elapsed; Extending the drying stroke for a third set time by adding a third set time to the small load if the dryness D detected at the time when the first set time elapses is less than or equal to the set value; When the dryness level D detected at the time when the first set time elapses is greater than or equal to the set value, the drying operation is terminated.

Therefore, the present invention can improve the drying performance of the small load by further improving the drying performance of the small load by adjusting the stroke time for the small load according to the degree of function of the fabric detected at the beginning of the stroke.

Dryer, humidity sensor, small load

Description

Drying control method of clothes dryer {Control method of clothes drier}

1 is a longitudinal sectional view showing a structural example of a general condensation type clothes dryer

Figure 2 is a cross-sectional view of the main part of the condensation type clothes dryer of Figure 1

Figure 3 is a flow chart showing a small load drying method of the clothes dryer according to the prior art

Figure 4 is a flow chart showing a small load drying method of the clothes dryer according to the invention

DESCRIPTION OF THE REFERENCE NUMERALS

15: heater 20: cooling fan

30: humidity sensor

The present invention relates to a clothes dryer, and more particularly, to a drying control method of a condensation type clothes dryer to improve the drying performance for a small load.

In general, a clothes dryer is a device that blows hot air generated by a heater into a drum to dry a drying object, and is largely an exhaust type clothes dryer and a condensation type according to a treatment method of wet air generated by drying a drying object. It is classified as a clothes dryer.

The exhaust type clothes dryer uses a method of discharging the wet air discharged from the drum to the outside of the dryer, and the condensation type clothes dryer removes moisture by condensing the wet air discharged from the drum in the condenser, and the dried air is removed from the drum. Send and recycle.

The structure of the condensation type clothes dryer will be described with reference to FIGS. 1 and 2 as follows.

1 and 2 show the structure of the condensation type clothes dryer according to the present invention, arrow I in these figures shows the flow of outside air, arrow II shows the flow of circulating air.

As shown in the drawing, a drum 11 in which a drying object is accommodated is rotatably installed in a main body 10 having a door 12 installed at a front surface thereof, and the drum 11 is a motor installed under the main body 10. It is connected to the belt 19 by 17 and is comprised so that it may rotate.

In addition, a condenser 13 is installed below the main body 10 to condense the hot and humid air circulating through the drum 11 to remove the moisture to make the circulated air dry. The front part and the rear part are connected to the circulation duct 14 connected to the front and the rear of the drum 11, respectively, and the air discharged through the drum 11 passes through the condenser 13 and flows back into the drum 11 again. It is configured to be.

The circulation duct 14 is provided with a heater 15 for heating the air passing through the condenser 13 and a circulation fan 16 for forcibly circulating the air through the circulation duct 14. 16 is configured to drive in connection with the other axis of the motor 17 which drives the drum 11.

On the other hand, in order to condense the air circulated through the circulation duct 14 by heat exchange in the condenser 13, the external cold air must be supplied to the condenser 13, one side of the condenser 13 for this purpose The outside air supply duct 18 is connected to the outside of the main body 10, the outside of the condenser 13 connected to the outside air supply duct 18 is forced to suck the outside air through the outside air supply duct 18 to the main body A cooling fan 20 and a cooling fan driving motor 21 for discharging into 10 are installed.

In addition, the lower portion of the condenser 13, a drip tray (not shown) which is generated during the condensation process and collects the condensed water dropped, and a condensate reservoir for forcibly discharging the condensate collected in the drip tray to the outside or installed in the main body 10 The pump 23 conveying by (not shown) is provided.

In addition, a humidity sensor 30 is installed at the front lower side of the drum 11 to detect a degree of drying of the drying object.

The humidity sensor 30 has two metal plates side by side and wires are connected to each metal plate. When the object to be dried is contacted between the metal plates on both sides, the resistance value of the object to be dried is changed to a microcomputer (not shown). It is to be read in to detect the dryness of the object to be dried.

That is, the humidity sensor 30 is in a state in which the circuit is electrically connected when the dry object containing moisture comes into contact with both metal plates at the same time, and the dry object acts as a resistance in the circuit to measure a voltage value corresponding thereto. This is supposed to be read.

Thus, when the voltage value measured by the humidity sensor 30 reaches a constant value, the microcomputer determines that the drying is completed and controls the operation of the dryer.

Here, the cooling time for lowering the temperature inside the dryer increased due to the drying stroke by setting the time to enter the cooling mode after the completion of the drying stroke to the time when the degree of drying of the drying object detected by the humidity sensor 30 is more than the target value. Cooling can be controlled.

However, the conventional clothes dryer performed the stroke by forcibly drying for a predetermined time without determining the degree of drying during the stroke in the case of a small load.

As shown in FIG. 3, when the user inputs an operation command for a small load, the heater 15 is driven to start a drying operation (S1). Thereafter, the driving of the heater 15 is forcibly maintained for a predetermined stroke time (for example, 23 minutes) with respect to the small load (S2 and S3). Meanwhile. When the set stroke time elapses, the drying stroke is terminated after performing the cooling stroke for a predetermined time while the driving of the heater 15 is stopped (S4).

That is, in the case of a small load, the drying administration is performed by a forced time control during the preset time. Even when a small load is carried out, the drying cannot be completed by only the time control.

For example, a small load of 2 kg or less can be defined as a small load, and an experiment in the production process sets the maximum stroke time that can be completely dried by time control alone.

However, when the user uses the product, he puts the cloth as a guess, so when the user wants to dry a load of just over 2 kg in a small load stroke, the drying is not completely completed. And product reliability is reduced.

The present invention is to solve the above problems, an object of the present invention is to provide a drying control method of the clothes dryer for improving the drying performance for a small load.

In order to achieve the above object, the present invention is mounted on the front of the drum inside the condensation type clothes dryer having a humidity sensor for detecting the dryness by the contact with the clothes, the user inputs the operation command for a small load Driving a heater to perform a drying stroke; Detecting a dryness degree (D) of a cloth at a time point when a first predetermined time elapses after entering the drying stroke; Determining whether the detected dryness level (D) is less than or equal to a preset value when a second preset time for the small load has elapsed; Extending the drying stroke for a third set time by adding a third set time to the small load if the dryness D detected at the time when the first set time elapses is less than or equal to the set value; When the drying degree (D) detected at the time when the first set time elapses, the drying control method of the drying dryer is terminated.

Here, the step of determining the dryness (D) of the cloth; After reading the dryness detected by the humidity sensor for a predetermined time from the time point of the first set time elapses, characterized in that for storing the maximum level of dryness.

And, the step of ending the drying stroke; After the cooling operation is performed for a predetermined time in a state in which the driving of the heater is stopped, all the steps are finished.

Therefore, according to the present invention, the drying performance can be improved by minimizing the undried state by controlling the stroke time according to the dryness during the drying stroke for a small load.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

Since the clothes dryer component of the present invention is the same as in the prior art, the same name and the same reference numeral are used for the convenience of description and detailed description thereof will be omitted.

Referring to Figure 4, when the drying control method of the clothes dryer according to the invention in detail.

In the present invention, the humidity sensor 30 uses a contact electrode sensor and is configured to be mounted on the front of the drum 11 to sense the dryness of the cloth.

First, when a user inputs a dry object in a wet state into the drum 11 and then inputs an operation command for a small load of a plurality of drying courses, a drying administration using warm air is started (S10).

The drying stroke will be described in detail, thereby driving the motor 17 to rotate the circulation fan 16 and the drum 11 and to drive the heater 15. Accordingly, air flows through the circulation duct 14. The air flowing through the circulation duct 14 is heated to a high temperature by the heater 15 and then flows into the drum 11.

On the other hand, the outside air introduced by the cooling fan 20 is supplied to the condenser 13 through the outside air supply duct 18 and then heat exchanged through the condenser 10 to the outside through one side of the main body 10 After being discharged and drying the object to be dried in the drum 11, the hot and humid air is condensed by heat exchange as it passes through the condenser 13 to be dried, and then heated by the heater 15 again to form a drum ( 11) flows into.

After the drying operation is started, it is determined whether a predetermined first set time T1 (for example, nine minutes) has elapsed (S20).

At this time, the drying degree (D) of the drying object detected by the humidity sensor 30 for a predetermined time (approximately 60 seconds) from the time point when the first set time T1 elapses is read out a plurality of times at regular intervals (S30). ) Remember the maximum dryness (D) among them. That is, the degree of function of the cloth is measured at the time point when the first set time T1, which is the beginning of the drying stroke, has elapsed.

The time (60 seconds) of reading the dryness D of the drying object is preferably a small load, and therefore, it is preferable to take sufficient time to measure the dryness.

Subsequently, it is determined whether or not the predetermined stroke time, that is, the second set time T2, has elapsed for the small load while continuing the drying operation (S40).

Here, the second set time (T2) is determined through a pre-shipment experiment as a stroke time that can be completely dried in the amount defined as a small load. For example, if a small load is defined as a dose within 2 kg, the time at which the dose can be completely dried is set to a time of 23 minutes or more.

As a result of the determination (S40), the drying stroke using the hot air is continued while the driving of the heater 15 is maintained until the drying stroke reaches the second set time T2 (S50).

On the other hand, when the second set time (T2) has elapsed since the drying operation is started, the drying degree (D) stored in the step S30 is read.

At this time, when the dryness D at the time when the first set time T1 elapses is equal to or greater than the preset value, it is determined that complete drying is performed only by the second set time T2, and the preheating state of the heater 15 is turned off. After performing a cooling mode for a predetermined cooling time (typically 10 minutes), all strokes are terminated (S60) (S70).

On the other hand, when the drying degree D at the time when the first set time T1 elapses is less than or equal to the preset value, it is determined that complete drying cannot be performed only by the second set time T2. After the determination, the driving stroke of the heater 15 is additionally extended for the third set time T3 (S80).

That is, when the degree of foaming function detected at the beginning of the drying stroke is greater than the reference value, it is judged that it is difficult to completely dry only by the stroke time of the small load and extends the drying stroke for a predetermined time.

Therefore, the present invention detects the dryness of the fabric at the beginning of the drying stroke and adds a predetermined time to a predetermined stroke time for a small load when the drying degree is greater than the reference value so that more complete drying can be achieved.

The present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art as can be seen from the appended claims, and such modifications are within the scope of the present invention.

The drying control method of the clothes dryer according to the present invention described above can improve the drying performance of the small load by further improving the drying performance of the small load by adjusting the stroke time for the small load according to the function of the cloth detected at the beginning of the stroke. .

Claims (3)

In the condensation type clothes dryer having a humidity sensor mounted on the front of the drum and detecting the dryness by contact with the clothes, Driving a heater to perform a drying stroke when a user inputs an operation command for a small load; Detecting a dryness degree (D) of a cloth at a time point when a first predetermined time elapses after entering the drying stroke; Determining whether the detected dryness level (D) is less than or equal to a preset value when a second preset time for the small load has elapsed; Extending the drying stroke for a third set time by adding a third set time to the small load if the dryness D detected at the time when the first set time elapses is less than or equal to the set value; Drying control method of the clothes dryer, characterized in that the drying operation is terminated when the dryness level (D) detected at the time when the first set time elapses. The method of claim 1, Determining the drying degree (D) of the fabric, after reading the drying degree detected by the humidity sensor for a predetermined time from the time point of the first set time elapses, characterized in that for storing the maximum level of the drying degree Drying control method of the clothes dryer. The method of claim 1, The step of terminating the drying administration, drying control method of the clothes dryer, characterized in that all the strokes are terminated after performing the cooling (cooling) stroke for a predetermined time in the state of stopping the driving of the heater.

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