KR-20260063506-A - A laundry treating apparatus and a control method of the same

KR20260063506AKR 20260063506 AKR20260063506 AKR 20260063506AKR-20260063506-A

Abstract

The present invention relates to a clothing processing device equipped with an open-loop control method when detecting the weight of clothing, so as to apply a constant current to a motor whenever the weight of clothing is detected during the clothing weight detection process.

Inventors

배순철
조영한
박준호
김민석

Assignees

엘지전자 주식회사

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (15)

Cabinet having an opening; A drum housed inside the cabinet and housing clothing; A driving unit that rotates the above drum; It includes a control panel comprising a power supply unit that receives a power command to supply power and a display unit that displays weight information of the clothing, and The above driving unit When the above power supply unit is input, it is configured to receive current and rotate the drum, and The above display part The above drum is configured to display weight information of the clothing after it has started to rotate, The above driving unit A clothing processing device characterized by being set to receive a constant current before the weight information is displayed on the display unit.
In paragraph 1, The above driving unit When the above power supply is input Before the weight information is displayed on the above display unit A clothing processing device characterized by being set to receive a uniform current for a specific period of time.
In paragraph 2, The above driving unit When the above power supply is input Before the weight information is displayed on the above display unit During the first time, a constant first current is supplied, and A clothing processing device characterized by being controlled to receive a constant second current different from the first current during the second time.
In paragraph 1, The current supplied to the driving unit before the weight information is displayed on the display unit is A clothing processing device characterized by being set to rotate the drum less than one revolution.
In paragraph 4, The current supplied to the driving unit before the weight information is displayed on the display unit is A clothing processing device characterized by being set to rotate the drum by 90 degrees or less.
In paragraph 4, A clothing processing device characterized by the above current being supplied for a time during which the drum is rotated less than one revolution.
In paragraph 1, The above driving unit Even if the weight of the clothing contained in the drum changes, Before the weight information is displayed on the above display unit A clothing processing device characterized by being set to receive the same current.
In Paragraph 7, The above driving unit If the weight of the clothing contained in the drum is different, Before the weight information is displayed on the above display unit, A clothing processing device characterized by being configured to rotate the above drum at different angular velocities.
In Paragraph 7, The above driving unit Before the weight information is displayed on the above display unit, If the weight of the above clothing is heavy, compared to when the weight of the above clothing is light A clothing processing device characterized by being set to rotate the drum at a slower angular velocity.
In paragraph 1, A door for opening and closing the above-mentioned opening, and It includes a locking mechanism for locking the above door to the above cabinet, The above driving unit After the above locking part locks the door, A clothing processing device characterized by being configured to receive a higher current after the weight information is displayed on the display unit.
In Paragraph 10, The above driving unit After the above locking part locks the door, A clothing processing device characterized by being configured to receive current for a longer period after the weight information is displayed on the display unit.
In Paragraph 10, The above driving unit After the above locking part locks the door, A clothing processing device characterized by being set to rotate the above drum continuously for one or more rotations.
In Paragraph 10, The above driving unit After the above locking part locks the door, A clothing processing device characterized by being set so that the supplied current changes when the weight of the clothing changes.
In Paragraph 13, The above driving unit If the weight of the above clothing is heavy A clothing processing device characterized by being set to receive a higher current when the weight of the clothing is light.
In paragraph 1, A tub provided inside the cabinet to accommodate the drum; It further includes a water supply valve for supplying water to the above tub, and The above driving unit When the above power supply is input, A clothing processing device characterized by being set to receive a constant current before the above-mentioned water supply valve is opened.

Description

A laundry treating apparatus and a control method of the same The present invention relates to a clothing processing device and a method for controlling the same. Generally, the term "clothing processing device" refers to a device capable of performing one or more of washing, drying, and care of clothing. Here, the clothing processing device may perform only washing, drying, or care functions, or may perform washing, drying, and care functions. Such a garment processing device is equipped with any course for washing, drying, or managing garments, and the execution time of said course is calculated based on the weight of the garment. For example, if the weight of the garment is large, the execution time will be set relatively long, and if the weight of the garment is small, the execution time will be set relatively short. The clothing processing device uses the motor current required to rotate the drum containing the clothing in order to detect the weight of the clothing. In the process of detecting the weight of the clothing, a conventional clothing processing device sets a commanded speed at which a motor rotates a drum and applies a corresponding current to the motor, and calculates the actual speed at which the drum rotates through the current output from the motor according to the actual rotation of the drum. A conventional garment processing device determines the increase or decrease of the supplied current based on the difference between the actual speed and the commanded speed, applies a new current value to the motor, and calculates the actual rotational speed of the drum by re-detecting the output current when the drum rotates. Conventional clothing processing devices can continuously perform this process in real time through feedback control to control the drum to rotate as much as possible close to the commanded speed. The above commanded speed may correspond to constant velocity or acceleration. FIG. 1 illustrates a conventional clothing processing device controlling the rotational speed of a motor in real time through feedback control. Referring to FIG. 1(a), the commanded speed may correspond to a constant acceleration, and a conventional clothing processing device may supply a commanded current to the motor to rotate the motor at the commanded speed. However, if the actual rotational speed of the drum differs from the commanded speed, the conventional garment processing device can modify the supplied commanded current to match the commanded speed through the current value output from the motor. If this process is performed continuously in real time, even if the drum initially rotates differently from the commanded speed, it can rotate closer to the commanded speed over time. Referring to FIG. 1(b), since the conventional clothing processing device varies the applied current value in real time using a feedback control method through the current output from the motor, the current value applied to the motor may vary over time. In other words, the characteristic of the current value in Fig. 1(b) initially rising and then decreasing in amplitude over time while forming a waveform can be seen as a characteristic of a clothing processing device that controls the motor through feedback control. Meanwhile, when the amount of clothing contained in the drum is small, the rotational speed of the drum can be easily varied even if the change in the current value applied to the motor is small, so the drum can rotate relatively quickly close to the commanded speed even if the current value is adjusted finely. On the other hand, when a large amount of clothing is contained in the drum, the change in the current value applied to the motor must be large for the drum's rotational speed to be variable, and if the change in the current value is large, the drum's rotational speed can change by a larger margin. Accordingly, the time required to adjust the commanded current value to rotate the drum at the commanded speed may be prolonged, so the drum may rotate relatively slower to approach the commanded speed compared to when there is a small amount of clothing. Conventional clothing processing devices calculated the weight of the clothing based on the time it takes for the drum to reach a commanded speed or the amount of current required to rotate at the commanded speed. Thus, in order to detect the weight of the clothing, it was essential for conventional clothing processing devices to perform feedback control, such as PI control, which measures not only the command current value corresponding to the command speed applied to the motor but also the current value output from the motor. Therefore, in order to secure the current value output from the motor and the time to measure the current value, it was common for conventional clothing processing devices to rotate the drum more than once or rotate the drum at a high RPM. For example, there is also a conventional garment processing device that rotates the drum up to