KR20060102959A - Control method of the condensing type clothes drier - Google Patents

Abstract

The present invention relates to a control method of a condensation type dryer which prevents a system malfunction caused by a case in which all loads are temporarily stopped due to filter clogging.

According to the present invention, a cooling fan forcibly sucking outside air to be supplied into the main body, a lint filter for filtering out foreign substances contained in the flow air, a heater for heating the flow air, and a position adjacent to the lint filter for sensing the temperature of the flow air In the condensation type clothes dryer having a first temperature sensing unit and a second temperature sensing unit installed in a position adjacent to the heater, the temperature level (A) and the first sensed through the first temperature sensing unit during the drying stroke Periodically reading the temperature level B detected through the temperature sensing unit, and the temperature level difference AB between the read first and second temperature sensing units is equal to or greater than a first set value and at the same time the second temperature sensing unit If the negative temperature level B is equal to or greater than the second set value, determining that the lint filter is clogged and stopping all the loads involved in the stroke; Through interaction with the step of cooling the flow of air in the main body it is characterized.

Clothes dryer, lint filter, clogged filter, heater safety device, thermostat

Description

Control method of the condensing type 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 a control method of the condensation type dryer according to the prior art

4 is a flow chart showing a control method of the condensation type dryer according to the present invention.

* Explanation of symbols for main parts of the drawings

15: heater 20: cooling fan

22: lint filter 30: the first temperature detection unit

40: second temperature detection unit

The present invention relates to a condensation type dryer, and more particularly, to a control method of a condensation type dryer to prevent system malfunction caused by the blockage of the filter due to filter clogging.

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.

1 and 2, the arrow I shows the flow of the outside air, the arrow II shows the flow of the 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, 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 fan 16 is configured to drive in connection with the other shaft of the motor 17 for driving 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 addition, a lower portion of the condenser 13 is forcibly discharged into a condensate reservoir (not shown), which collects condensate generated during the condensation process and collects the condensed water dropped in the condenser, and the condensate collected in the drip tray is installed in the main body 10. In order to achieve this, a 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.

Accordingly, when the clothes dryer is repeatedly used for a long time, a large amount of foreign substances are caught in the lint filter 22, so that the air flow through the circulation duct 14 is not smoothly performed, and thus the drying rate of the cloth is drastically lowered and the heater (15) There was a fear of overheating the temperature.

In order to detect the blockage of the lint filter 22, a method of sensing the temperature of the flow air in the circulation duct 14 is used. For this purpose, a first temperature is located at a position adjacent to the lint filter 22 in front of the drum 11. A detector 30 is installed and a second temperature detector 40 is installed at a position adjacent to the heater 15 behind the drum 11.

Referring to the control method of the condensation type dryer according to the prior art by such a configuration as follows.

As shown in FIG. 3, the temperature level A detected through the first temperature detector 30 and the temperature level B detected through the second temperature detector 40 during the drying stroke are performed. Read periodically (S1).

After calculating the temperature level difference AB of the read first and second temperature detectors 30 and 40, the temperature level difference AB is 110 ° C. or higher and simultaneously detects the second temperature. It is determined whether or not the temperature level (B) detected by the unit 40 is 150 ℃ or more (S2).

That is, when the temperature level difference AB is 110 ° C. or more during the drying stroke and the temperature level B detected by the second temperature detector 40 is 150 ° C. or more, it is determined that the lint filter 22 is blocked. In operation S3, all the loads involved in the drying administration are stopped.

Then, in order to notify the user of the blocked state of the lint filter 22, a corresponding notification message is displayed through the display means of the dryer (S4).

Thereafter, after the user recognizes the filter clogging, the lint filter 22 is removed to remove foreign substances collected in the filter, and the filter is washed with water.

However, in the conventional case, when it is determined that the filter is clogged, all the loads are stopped. At this time, the air flow circulating toward the running heater stops suddenly, and the temperature around the heater as well as the heater increases locally by the latent heat of the heater. .

At this time, the thermostat, which is a safety device of the heater, is automatically switched to the off state. In this case, the heater does not operate despite the cleaning of the filter in the future use of the dryer, so that the user does not understand the cause of the failure and needs to request service.

The present invention is to solve the above problems, an object of the present invention is to provide a control method of the condensation type dryer to prevent the system malfunction caused by the instantaneous interruption of the driving of all loads due to filter clogging. will be.

In order to achieve the above object, the present invention provides a cooling fan for forced suction and supply to the main body, a lint filter for filtering out foreign substances contained in the flow air, a heater for heating the flow air, and senses the temperature of the flow air In order to provide a condensation type clothes dryer having a first temperature sensing unit installed at a position adjacent to the lint filter and a second temperature sensing unit installed at a position adjacent to the heater, it is detected through the first temperature sensing unit during a drying stroke. Periodically reading the temperature level A and the temperature level B detected through the second temperature sensing unit, and the difference between the temperature levels of the read first and second temperature sensing units AB is greater than or equal to the first set value. And at the same time, if the temperature level B of the second temperature sensing unit is equal to or greater than the second set value, determining that the lint filter is blocked and stopping all loads involved in the stroke. It provides a control method of the condensation type dryer comprising the step of driving the cooling fan for a predetermined time to cool the flow air in the main body.

Therefore, according to the present invention, even if all the loads are stopped by the filter clogging, it is possible to prevent system malfunction due to latent heat of the heater by maintaining and cooling the air circulation in the main body for a predetermined time.

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.

On the other hand, as a means for determining the clogging state of the lint filter 22, the first temperature sensing unit 30 provided at a position adjacent to the lint filter 22, and the second temperature sensing provided at a position adjacent to the heater 15 The part 40 is used.

In the condensation type dryer of the above configuration, a control method of the dryer according to the present invention will be described with reference to FIG. 4 as follows.

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.

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 process, the ambient temperature A of the lint filter 22 is sensed through the first temperature detector 30 and the heater 15 is sensed through the second temperature detector 40. The ambient temperature B can be detected.

Then, the temperature levels A and B detected by the first and second temperature detectors 30 and 40 are periodically read (S10), and the read first and second temperature detectors ( 30) The temperature level difference AB of 40 is calculated.

Thereafter, the temperature level difference AB between the first and second temperature detection parts 30 and 40 is 110 ° C. or more, and at the same time, the temperature level B detected by the second temperature detection part 40 is 150 ° C. It is determined whether or not the abnormality (S20).

The determination result (S20), if the temperature level difference (AB) during the stroke is 110 ℃ or more and at the same time the temperature level (B) detected by the second temperature sensor 40 is at least 150 ℃ lint filter 22 It is determined that the blockage and stop the driving of all the loads involved in the drying operation, including the motor 17 and the heater (15) (S30).

Subsequently, in the present invention, the driving of the cooling fan 20 is maintained for a predetermined time, and only the cooling fan 20 is driven for a predetermined time while the heater 15 is turned off to maintain air circulation in the main body 10. In accordance with the cooling of the high-temperature flow air (S40).

Subsequently, when the set time has elapsed (S50), a message indicating a blocked state of the lint filter 22 is displayed through a display unit (not shown) of the dryer (S60), and the user confirms the notification message to the filter. The collected foreign matter will be removed.

Therefore, the present invention prevents an increase in the ambient temperature due to latent heat of the heater 15 by operating the cooling fan 20 for a predetermined time when the heater 15 is suddenly stopped due to the clogging of the lint filter 22. Can be.

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 condensation type dryer according to the present invention described above can prevent the latent heat of the heater that rises momentarily by operating the cooling fan for a certain time when the driving of the heater is suddenly stopped due to the filter clogging.

Therefore, by preventing a malfunction of the heater stabilizer (eg, the thermostat) due to the latent heat of the heater, unnecessary service requests may not be generated and product reliability may be improved.

Claims (2)

A cooling fan forcibly sucking outside air and supplying it to the main body, a lint filter for filtering out foreign substances contained in the flow air, a heater for heating the flow air, and a lining filter disposed adjacent to the lint filter for sensing the temperature of the flow air. 1. A condensing clothes dryer having a temperature sensing unit and a second temperature sensing unit installed at a position adjacent to a heater. Periodically reading a temperature level A detected through the first temperature sensing unit and a temperature level B sensing through the second temperature sensing unit during a drying process; If the temperature level difference AB of the first and second temperature sensing units read is greater than or equal to the first set value and the temperature level B of the second temperature sensing unit is greater than or equal to the second set value, it is determined that the lint filter is clogged and the process is performed. Stopping all involved loads, Subsequently, driving the cooling fan for a predetermined time to cool the flow air in the main body. The method of claim 1, The control method of the condensation type dryer, characterized in that further comprising the step of stopping the operation of the cooling fan when the set time has elapsed and displaying a message indicating the blocked state of the lint filter.

Images