KR20020060349A - The revolution control method for a dryer - Google Patents

Abstract

PURPOSE: A rotation speed controlling method of a clothing drying machine is provided to variably control rotation speeds of a drum and a blower according to operation sections and temperature change, thereby reducing the drying time period and power consumption while increasing the drying efficiency. CONSTITUTION: A rotation speed controlling method of a clothing drying machine includes the steps of controlling a driving motor for increasing or reducing rotation speeds of a drum and a blower as operation time lapse after a drying operation is started, wherein the drying step is divided into beginning of drying, middle of drying and end of drying sections, and the rotation speed of the driving motor becomes increased gradually from the beginning to the end of the drying sections.

Description

{THE REVOLUTION CONTROL METHOD FOR A DRYER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer for drying laundry and the like, and more particularly, to a method for controlling a rotation speed of a clothes dryer to change a rotation speed of a drum according to a time for drying clothes.

In general, a clothes dryer includes an exhaust type for drying clothes by introducing outside air, and a dehumidification method for drying clothes while removing moisture while circulating internal air and condensing the removed moisture in a droplet state.

1 is a cross-sectional configuration view showing an exhaust type clothes dryer of the clothes dryer.

The exhaust type clothes dryer is rotatably installed in the case 10, and a drum 20 configured to dry the clothes therein, a driving device 30 for rotating the drum 20, and the drum 20. A heater 25 installed in the suction casing 22 which is rear of the heater and heating the suction air, and a blower 35 which is provided in the exhaust casing 27 which is the front lower side of the drum 20 to forcibly flow the air. do.

An opening 11 is formed on the front surface of the case 10 so that clothes can be put into or taken out of the case 10, and the opening 11 can be opened or closed to seal or open the drum 20 to open or discharge clothes. 15) is installed.

The drum 20 has a suction port 20a through which the heated outside air is introduced while passing through the heater 25, and the exhaust casing 27 exhausts air drying clothes from the drum 20. The exhaust passage 27a is formed so as to be able to do so.

And, on the exhaust passage (27a) of the exhaust casing 27, a filter 40 for filtering foreign matter such as lint generated during the clothing drying process is installed, the temperature sensing for sensing the temperature of the exhaust air at the rear of the filter The sensor 45 is installed.

The drive device 30 includes a drive motor 31 in which shafts 31a and 31b protrude from both sides so as to rotate the blower 35 and the drum 20 simultaneously, and the shaft of the drive motor 31. It is composed of a belt 33 which is connected to the periphery of the pulley 32 and the drum 20 provided in the 31a to transmit the rotational power.

In the exhaust clothes dryer configured as described above, as the driving motor 31 rotates, the blower 35 rotates at the same time as the drum 20 connected to the belt 33 rotates.

As the blower 35 rotates, outside air is introduced into the suction casing 22, and the outside air is heated while passing through the heater 25 and introduced into the drum 20.

As such, the heated air introduced into the drum 20 dries the clothes while exchanging heat with the damp clothes, and the humid air from which the clothes are dried is discharged to the outside through the exhaust casing 27.

2 is a graph illustrating a method of controlling a rotation speed of a clothes dryer according to the prior art, and the conventional driving motor 31 is formed of a motor that generates only one direction rotational driving force and cannot change the rotational speed.

Therefore, as shown in FIG. 2, as the operation time proceeds to the beginning of the drying, the middle of the drying, and the end of the drying, the temperature inside the drum, that is, the temperature of the exhaust air detected through the temperature sensor 45 increases.

However, since the driving motor 31 is controlled to operate at a constant rotational speed, the drum 20 and the blower 35 also rotate at a constant speed regardless of the driving conditions and timing, so that there is a limit to increase the drying efficiency. There is a problem.

The present invention has been made to solve the above problems, by controlling the rotational speed of the drum and blower in accordance with the operating time or temperature changes can reduce the drying time and power consumption while increasing the drying efficiency It is an object of the present invention to provide a method for controlling the rotational speed of a dryer.

1 is a cross-sectional configuration view showing a typical exhaust clothes dryer;

2 is a graph illustrating a rotation speed control method of a clothes dryer of the prior art;

3 is a graph illustrating a rotation speed control method of a clothes dryer according to an embodiment of the present invention;

Figure 4 is a graph illustrating a rotation speed control method of a clothes dryer of another embodiment according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10 case 20 drum

22: suction casing 25: heater

27: exhaust casing 30: drive device

31: drive motor 33: belt

35: blower 40: filter

45: temperature sensor

Rotational speed control method of the clothes dryer of the present invention for realizing the above object is a drum rotatably installed in the case and drying clothes inside, drying the passage or clothes for supplying heating air into the drum In the clothes dryer provided in any one of the passage for discharging the air to be forced to flow the air, and a drive motor for rotating the drum and the blower, the clothes dryer, the operation time after the start of drying operation And controlling the drive motor to increase or decrease the rotational speed of the drum and blower.

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

3 is a graph illustrating a method of controlling a rotation speed of a clothes dryer according to an embodiment of the present invention.

1 and 3, the rotation speed control method of the clothes dryer according to the present invention is divided into the initial drying stage, the middle drying stage, and the final stage of drying according to the temperature change according to the operating time, and in each drying step. The drive motor 31 is controlled so that the rotational speeds of the drum 20 and the blower 35 increase in stages.

That is, when the operation of the clothes dryer is started and the hot air is supplied into the drum 20 to set the time to rise to an appropriate temperature range for drying, the temperature in the drum 20 is set to an appropriate temperature range for drying clothes. The drying time is set to the middle of drying the clothes while being kept constant, and the drying time of the clothes is almost progressed and the time of rapid rise in the appropriate temperature range is set to the end of drying.

The rotational speed of the drive motor 31 according to the drying step is controlled to rotate at a constant rotational speed suitable for drying clothes in the middle of drying, and at the initial stage of drying so as to rotate at a relatively lower rotational speed than the rotational speed of the drying medium It is controlled to be rotated at the end of the drying at a relatively higher rotational speed than the drying medium.

As described above, when the rotational speeds of the drum 20 and the blower 35 are controlled differently according to the drying step, the blower 35 is slowly rotated at the initial stage of drying in which the rotational speed is relatively low, thereby heating the drum 20. Since the air is slowly discharged, it is possible to reduce the heat loss inside the drum 20 so as to quickly reach the appropriate temperature for drying the clothes.

In addition, since the rotational speeds of the drum 20 and the blower 35 are kept constant in the drying medium operated at an appropriate rotational speed, full-scale clothing drying can be performed.

Finally, at the end of drying, the drying of clothes is somewhat progressed so that the moisture in the drum 20 is low and the amount of heat is sufficient, so that the rotational speed is relatively fast and the humid air generated during the drying process can be rapidly discharged. It can shorten and increase the drying efficiency.

Figure 4 is a graph illustrating a rotation speed control method of a clothes dryer of another embodiment according to the present invention.

In the above-described embodiment, the rotational speed is controlled to be increased or decreased step by step, while in another embodiment of the present invention, the rotational speed of the driving motor 35 is controlled to be gradually increased or decreased at a constant slope as shown in FIG. 4. The drying speed of the drum 20 and the blower 35 is also gradually increased, thereby drying clothes.

Rotational speed control method of the clothes dryer of the present invention configured and acted as described above to control the rotational speed of the drum and blower in accordance with the operating time or temperature change to reduce the drying time and power consumption while increasing the drying efficiency It provides an advantage that can be made.

Claims (4)

A blower installed in one of the drums rotatably installed in the case to dry the clothes therein, and a passage for supplying heating air to the drums or a passage for discharging the air to dry the clothes; In the clothes dryer comprising a drive motor for rotationally driving the drum and the blower, And controlling the driving motor to increase or decrease the rotational speed of the drum and the blower as an operation time passes after starting a drying operation. The method of claim 1, In the method for controlling the rotation speed of the clothes dryer, a drying step is divided into an initial stage of drying, a middle stage of drying, and a final stage of drying as the operation time elapses, and the rotational speed of the driving motor increases in stages while exceeding each drying period. Rotational speed control method of the clothes dryer characterized in that the control. The method of claim 2, The drying step is operated when the operation time is elapsed, the operation is divided into the initial drying if lower than the reference set temperature range, the middle of the drying if the reference set temperature range, and the end of the drying if higher than the reference set temperature range according to the temperature change drying the clothes, The rotation speed of the drive motor is controlled to increase the rotation speed step by step over the respective drying time. The method of claim 1, The rotation speed of the drive motor is a rotation speed control method of the clothes dryer, characterized in that the control is to be gradually increased as the temperature for drying the clothes as the driving time elapses.