KR101137332B1 - Control method of the clothes drier - Google Patents

Abstract

The present invention relates to a control method of a dryer to determine an abnormality of a temperature sensor and to provide a product having high stability. The present invention relates to a heater for heating flow air, and a heater installed at a position adjacent to the heater and heated by the heater. A condensation type dryer having a temperature sensing unit for sensing a temperature, comprising: reading a temperature level t1 detected through the temperature sensing unit at a time point when a first predetermined time elapses after entering a drying stroke; Next, reading the temperature level (t2) detected through the temperature sensor at the time point when the second preset time elapses; Determining whether the temperature level t1 at the time when the first set time elapses and the temperature level t2 at the time when the second set time elapses are equal to or greater than the preset temperature T; If the temperature level (t1) (t2) is all the set temperature (T) or more, the step of determining the abnormality of the temperature sensing unit is made to stop the drying operation.

Therefore, the present invention can determine the abnormality of the high temperature temperature sensor and control the stroke according to the result, thereby preventing safety accidents such as fire due to the failure of the high temperature temperature sensor, thereby improving the safety and reliability of the product.

Clothes dryer, sensor error, high temperature temperature sensor

Description

Control method of the dryer {Control method of the clothes drier}

1 is a longitudinal sectional view showing main parts of a structure of a general condensation type dryer.

2 is a cross-sectional view of main parts of the condensation type dryer of FIG. 1.

Figure 3 is a flow chart showing the sensor abnormality determination and the stroke control method according to the dryer according to the invention

DESCRIPTION OF THE REFERENCE NUMERALS

15: heater 20: cooling fan

30: first temperature sensor 40: second temperature sensor

The present invention relates to a dryer, and more particularly to a control method of a dryer to determine the abnormality of the temperature sensor to provide a product with high stability.

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.

Here, 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, and then removes the dried air from the drum to the drum. Send and recycle.

Hereinafter, a structural example of the condensation type clothes dryer will be described with reference to FIGS. 1 and 2.

Arrow I in the figure 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 in which a door 12 is 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, so that 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.

In addition, 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, the circulation The fan 16 is configured to be connected to and drive on another axis of the motor 17 which drives the drum 11.

In this case, as a safety device of the heater 15, a thermostat (not shown) which is automatically switched to an off state when the heater 15 is overheated above a predetermined temperature is configured in series with the heater 15. do.

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 The cooling fan 20 and the cooling fan drive motor 21 are installed to discharge into the 10.

In the lower part of the condenser 13, a drip tray (not shown) for collecting condensed water dropped during the condensation process and the condensate collected in the drip tray are forcibly discharged to a condensate reservoir (not shown) installed in the main body 10. The pump 23 is provided.

In addition, the lint filter 22 is attached to the circulation duct 14 in front of the drum 11 to filter foreign matter such as lint and the like adhered to the dry object during the air flow. The lint filter 22, which is a foreign matter collecting device, collects foreign matters while the air including the foreign matters rotates in the circulation duct 14.

In addition, in order to prevent the risk of temperature rise during the stroke, temperature sensing and system control through the same are necessary.

To this end, a first temperature detector 30 is installed at a position adjacent to the lint filter 22 in front of the drum 11 and a second temperature is sensed at a position adjacent to the heater 15 behind the drum 11. The unit 40 is to be installed.

In this case, the first temperature sensor 30 is configured as a low temperature thermistor to detect a temperature below the reference temperature, and the second temperature detector 40 is configured as a high temperature thermistor to detect a temperature higher than the reference temperature. .

The first and second temperature sensors 30 and 40 configured as described above are used to sense the temperature of the air flowing during the stroke, and control the driving of the heater 15 according to the sensed temperature level.

The conventional dryer detects an abnormality of the low temperature thermistor constituting the first temperature sensing unit 30 and determines that the sensor is defective (open, short). The output was terminated.

However, in the related art, the high temperature thermistor constituting the second temperature sensing unit 40 was an algorithm that maintains the stroke without determining when the sensor is defective. Therefore, since the stroke is continued in a state where the temperature detection of the high temperature thermistor is not normally performed, there is a concern that a safety accident such as a fire may occur.

The present invention is to solve the above problems, an object of the present invention is to provide a control method of the dryer for detecting the abnormality of the high temperature temperature sensor and to improve the operation of the drying administration.

In order to achieve the above object, the present invention provides a drying stroke in the condensation type dryer having a heater for heating the flow air, and a temperature sensing unit installed at a position adjacent to the heater to sense the temperature of the flow air heated by the heater. Reading a temperature level t1 sensed through the temperature detector at a time point when the first preset time elapses after entering the controller; Next, reading the temperature level (t2) detected through the temperature sensor at the time point when the second preset time elapses; Determining whether the temperature level t1 at the time when the first set time elapses and the temperature level t2 at the time when the second set time elapses are equal to or greater than the preset temperature T; If the temperature level (t1) (t2) is all the set temperature (T) or more provides a control method of the dryer comprising the step of determining the abnormality of the temperature sensing unit and stopping the drying operation.

In this case, when it is determined that the temperature sensing unit is abnormal, the driving of the heater is stopped and the cooling stroke is performed for a preset time, and then all the strokes are stopped.

In addition, the present invention is a condensation type dryer having a heater for heating the flow air, and a temperature sensing unit installed at a position adjacent to the heater to sense the temperature of the flow air heated by the heater, the drying stroke by driving the heater Reading the temperature level detected through the temperature sensing unit at a predetermined interval at least twice during the process; When the read temperature level is determined to be at least two times or more continuously the predetermined temperature (T) provides a control method of the dryer comprising the step of stopping the drying stroke.

In the present invention, the set temperature (T), which is a criterion for determining whether the temperature sensing unit is abnormal, is characterized in that the maximum temperature level within the temperature range that can be detected during the drying stroke.

Therefore, according to the present invention, it is possible to determine whether or not an abnormality of the high temperature temperature sensor for detecting the temperature of the flow air during the drying stroke and control the stroke according to the determination result to ensure product stability against the abnormality of the high temperature temperature sensor.

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

Condensation dryer components of the present invention is the same as the conventional, the same components will be given the same name and the same reference numerals for convenience of description.

First, a condenser 13 is installed below the main body 10 to condense the hot and humid air circulating through the drum 11 to remove moisture.

In addition, a heater 15 is configured in the circulation duct 14 to heat the dry air that has passed through the condenser 13.

In addition, in order to supply external cool air to the main body 10 via the condenser 13, an external air supply duct 18 connected to the main body 10 is connected to one side of the condenser 13, and the condenser 13 is connected to the main body 10. On the opposite side of the cooling fan 20 for forcibly sucking outside air and supplying it to the main body 10 is installed.

The first temperature sensor 30, which is a low temperature temperature sensor, is installed at a position adjacent to the lint filter 22, and the second temperature sensor 40, which is a high temperature temperature sensor, is a heater 15 behind the drum 11. It is installed at the position adjacent to the.

According to the present invention, when the sensor detects an abnormality (open, short) of the second temperature sensor 40 and determines that the sensor is abnormal, an operation for protecting the system is performed.

In the condensation type dryer of the above configuration, the control method of the dryer according to the present invention will be described with reference to FIG.

First, when a user inputs a drying object in a wet state into the drum 11 and starts operation for a drying stroke, a drying stroke using warm air is started (S110).

In detail, the motor 17 is driven 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 13 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.

During this drying stroke, the ambient temperature of the heater 15, that is, the temperature of the flow air heated by the driving of the heater 15, may be sensed through the second temperature sensing unit 40.

The present invention reads the temperature level t1 sensed by the second temperature sensor 40 at the time when the first set time elapses after entering the drying stroke (S130).

Then, it is determined whether the read temperature level t1 is equal to or higher than the preset temperature T (S150), and when the temperature level is higher than the preset temperature T, it is recognized as 'highest temperature detection' and the corresponding information is stored. (S170).

At this time, the set temperature (T) is a criterion for determining whether or not the second temperature sensor 40 is abnormal, which is set to the highest temperature level or higher than the maximum temperature within the temperature range that can be detected during the drying stroke ( For example, it is preferable to set to 205 degreeC or more).

Subsequently, the temperature level t2 detected by the second temperature sensor 40 is read at the time when the second set time elapses after the first set time elapses (S190).

When the read temperature level t2 is at a level higher than or equal to the set temperature T, information corresponding to 'highest temperature detection' is stored (S210 and S230).

Thereafter, when the temperature level t1 (t2) at the time when the first set time elapses and the time when the second set time elapses is greater than or equal to the set temperature T according to the stored information, the second temperature sensor 40 Recognizes the abnormality of the high temperature temperature sensor (S250).

That is, when it is determined that the sensor of the second temperature sensor 40 is abnormal, the driving of the heater 15 is stopped and an error message or a buzzer is output (S270), and the cooling fan 20 is driven for a predetermined time. After performing the cooling administration (cooling) to end all the stroke (S290).

On the other hand, either the temperature level t1 (t2) at the time when the first set time has elapsed or the time when the second set time has elapsed is equal to or lower than the set temperature T, or all temperature levels t1 (t2) are set. When the temperature is equal to or lower than the constant temperature T, the second temperature sensing unit 40 is recognized as a normal state and the driving of the heater 15 is maintained to continue the drying operation (S310).

Therefore, the present invention reads the temperature level detected by the second temperature sensing unit at regular time intervals during the course of the stroke, and determines that the sensor is abnormal and stops the stroke when the highest temperature is continuously detected.

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

The control method of the dryer according to the present invention described above, if the temperature level of the high temperature temperature sensor detected at a predetermined time interval during the stroke is continuously detected the maximum temperature is judged to be the sensor abnormality and the stroke for the safety of the product Stop.

Therefore, it is possible to prevent safety accidents such as a fire due to a failure of the high temperature temperature sensor, thereby improving the safety and reliability of the product.

Claims (5)

A condensation type dryer having a heater for heating flow air, and a temperature sensing unit installed at a position adjacent to the heater and sensing a temperature of the flow air heated by the heater, Reading the temperature level t1 sensed through the temperature detector at a time point when the first preset time elapses after entering the drying stroke; Next, reading the temperature level (t2) detected through the temperature sensor at the time point when the second preset time elapses; Determining whether the temperature level t1 at the time when the first set time elapses and the temperature level t2 at the time when the second set time elapses are equal to or greater than the preset temperature T; If the temperature level (t1) (t2) is all the set temperature (T) or more, the control method of the dryer, characterized in that the step of determining the abnormality of the temperature sensing unit and stopping the drying operation. The method of claim 1, If it is determined that the temperature sensing unit is abnormal, stopping the driving of the heater and performing a cooling stroke for a preset time, and then stopping all the strokes. The method of claim 1, And continuing the drying process if at least one of the temperature levels (t1) and (t2) is less than or equal to a set temperature (T). A condensation type dryer having a heater for heating flow air, and a temperature sensing unit installed at a position adjacent to the heater and sensing a temperature of the flow air heated by the heater, Reading the temperature level detected through the temperature sensing unit at a predetermined interval at least two times during the drying process by driving the heater; And stopping the drying process if it is determined that the read-in temperature level is at least two times or more consecutively above the preset temperature (T). The method according to claim 1 or 4, The set temperature (T) is a control method of a dryer, characterized in that the highest temperature level in the temperature range that can be detected during the drying stroke.

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