KR19980083193A - Unbalance and door open / close detection device of automatic washing machine and its detection method - Google Patents

Abstract

The present invention relates to an unbalance and door opening and closing detection device and a method for detecting the automatic washing machine, the detection means installed to detect the unbalance of the washing tank generated at the time of dehydration and opening and closing the door at the same time, the unbalance and opening and closing of the washing tank It consists of a control means for controlling the dehydration stroke in response to the detection signal detected by the sensing means for detecting the unbalance of the washing tank and the opening and closing of the door by one sensing means can reduce the assembly labor of the automatic washing machine and reduce the material cost It has a very good effect.

Description

Unbalance and door open / close detection device of automatic washing machine and its detection method

The present invention relates to an unbalance and door opening and closing detection device of a fully automatic washing machine. The present invention relates to an unbalance and door opening and closing detection device of a fully automatic washing machine capable of sensing the shaking amount of a washing tank and detecting the opening and closing of a door.

As shown in FIG. 1, a magnet 300 generating a rotation speed signal is installed at a rotation shaft 200 of a washing motor 120 of a conventional washing machine, and the magnet 300 is disposed around the magnet 300. The Hall sensor 400 for receiving the rotational speed signal from the system was installed.

In the conventional washing machine, the rotation speed of the washing motor 120 is sensed by the rotation speed detecting means, and the deviation per unit time of the rotation speed is calculated. Next, the control means judges whether the washing tank is shaken greatly by determining whether the rotation speed is larger than the set deviation set in the memory.

However, the rotation speed detection means of such a washing tank had a complicated sensing structure and poor accuracy.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide an unbalanced and door opening and closing detection device of the automatic washing machine capable of accurately detecting the shaking state of the washing tub and at the same time detect the opening and closing of the door. .

In order to achieve the above object, the unbalanced and door open / closed detection device of the automatic washing machine according to the present invention includes a sensing means installed to simultaneously detect unbalance of the washing tank and whether the door is opened or closed at the time of dehydration administration, and unbalance and open / close the door. Receiving a sensed signal detected by the sensing means for detecting the control means for controlling the dehydrating stroke.

In addition, the detection method of the unbalance and the door opening and closing detection device of the automatic washing machine according to the present invention is installed on one side of the door pulse detection step for detecting the pulse output from the detection means for detecting the unbalance detection of the washing tank and whether the door opening and closing detection at the same time; And a dehydration stroke control step of controlling the dehydration stroke according to the unbalance of the washing tank and the door opening and closing state based on the pulse detected in the pulse detection step.

1 is a cross-sectional view of a conventional fully automatic washing machine,

2 is a cross-sectional view of a fully automatic washing machine according to the present invention;

3 is a control circuit block diagram of the unbalance and door opening and closing means of the automatic washing machine according to an embodiment of the present invention;

4A is a cross-sectional view showing the state of the detection means when the door is closed in the unbalance and door opening and closing detection means of the automatic washing machine according to an embodiment of the present invention;

Figure 4B is a cross-sectional view showing the state of the detection means when opening the door in the unbalance and door opening and closing detection means of the automatic washing machine according to an embodiment of the present invention,

5 is a flowchart illustrating a method for detecting unbalance and door opening and closing of a fully automatic washing machine according to an embodiment of the present invention;

Figure 6 is a waveform diagram output from the unbalance and door opening and closing means of the automatic washing machine according to an embodiment of the present invention.

* Description of the main parts of the drawings *

101 housing 103 tub

104: washing machine 105: washing tank and dehydration tank

107: balance device 108: tension bar

109 door 110 rear panel

111: water supply valve 113: key input means

114: unbalance and door opening and closing detection means

115: drain valve 116: drain hose

118: washing wing 120: washing motor

122: clutch 124: control means

126: power supply means 130: water supply valve

132: washing motor drive circuit 138: display means

140: sound generating means 142: memory

144 light emitting unit 146 light receiving unit

147: slope 148: blocking ball

150: first hinge 152: first hinge pin

154: second hinge 156: second hinge pin

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, in the fully automatic washing machine of the present invention, a housing 101 which maintains a shape and protects an inside thereof is formed outside. A tub 103 may be installed inside the housing 101 to store wash water at the time of washing.

The dehydration tank 105 having a washing hole 104 is installed inside the tub 103 so that the washing water can be scattered by the centrifugal separation during the dehydration operation. The dehydration tank 105 is a washing tank 105 for washing the laundry cloth in the laundry administration. The upper end of the dehydration tank 105 is equipped with a balance device 107 is loaded with a liquid therein to reduce the unbalance during the dehydration stroke.

On the surface of the upper front side of the housing 101, a key input means 113 is installed to input the whole process of washing by the user. The key input unit 113 is composed of keys for inputting a washing course, washing time, rinsing frequency, dehydration time, washing type, washing amount control, and the like.

A door 109 which is coupled to and folded by a first hinge 150 and a first hinge pin 152 is installed at an upper center portion of the automatic washing machine. The rear door of the door 109 is connected by the second hinge 154 and the second hinge pin 156 so as to be connected to the main body of the automatic washing machine. One side of the rear door of the door 109 is fixed to the detection means 114 for detecting the unbalance and opening and closing of the door near the second hinge 154 by a screw.

The sensing means 114 is a light-emitting unit 144 for emitting light, and a container closed by shaking the light emitted from the light-emitting unit 144 by opening and closing of the door 109 and unbalance of the washing tank 105 Blocking ball 148 to shake and block within, and the light receiving unit for receiving the light emitted from the light emitting unit 144 when the blocking ball 148 is shaken according to the opening and closing of the door 109 and the shaking of the washing tank 105. 146 and a hole through which the light emitted from the light emitting unit 144 passes, and at the same time, the door 109 is inclined so that the blocking ball 148 is positioned at a set position when the door 109 is opened and unbalanced. Consists of the inclined surface 147.

A drain valve 115 is connected to the tub 103 on a surface of the upper front surface of the housing 101 to drain the wash water washed in the washing tank 105. The drain valve 115 is connected to the drain hose 116 to discharge the contaminated wash water to the outside. The housing 101 is provided with a tension bar 108 to support the tub 103.

Under the tub 103, a pulsator 118 for rotating the wash water and a washing motor 120 are installed to rotate the washing tank 105. One side of the washing motor 120, the clutch 122 is installed to selectively transfer the rotational force of the washing motor 120 to the washing tank 105.

As shown in FIG. 3, the control means 124 is a microcomputer that receives the sensing signal output from the sensing means 114 and determines whether the washing tank 105 is unbalanced and whether the door is opened or closed.

The power supply means 126 is connected to the control means 124 to receive an AC voltage of 220V from an external AC power source and to supply a 5V DC voltage to the control means 124.

The key input means 113 is connected to the control means 124 to input a user's operation command regarding washing to the control means 124.

The water supply valve 130 is connected to the control means 124 to open and close the water supply pipe by receiving a control signal from the control means 124.

The washing motor driving circuit 132 is connected to the control means 124 to receive a control signal from the control means 124 and to apply a voltage having a direction to the washing motor 120.

The drain valve 116 is connected to the control means 124 to open and close the drain valve 115 by receiving a control signal from the control means 124.

The notification means comprises a display means 138 for visually displaying the washing state by receiving the notification signal output from the control means 124 and the sound generating means 140 for outputting a sound related to the washing state.

Hereinafter, the effect of the unbalance and door opening and closing detection device of the automatic washing machine according to an embodiment of the present invention in connection with the unbalance and door opening and closing detection device of the automatic washing machine and the sensing method according to an embodiment of the present invention configured as described above It explains in detail.

First, when the user presses the power supply button of the power supply means 126, an AC voltage of 220V is output to the power supply means 126 from an external AC power source. The DC voltage of 5V is supplied from the power supply means 126 to the control means 124.

Next, the user opens the door 109, puts the laundry cloth in the washing tank 105, and closes the door 109. Next, an operation command for washing is input to the key input means 113. Subsequently, an operation command is output from the key input means 113 to the control means 124. The control signal for opening the water supply valve 130 from the control means 124 is output. Then the water supply valve 130 is opened.

Next, the washing water flows into the washing tank 105 by the opening of the water supply valve 130 to perform washing. Next, when the washing operation is finished, a control signal is output from the control means 124 to the drain valve 115. Then, the drain valve 115 is opened and dirty laundry water flows out through the drain hose 116 connected to the outside.

The laundry administration proceeds for a time input by the user. Next, a control signal for advancing a rinsing stroke is output from the control means 124. The rinsing process also proceeds with the rinsing process as many times as set by the user.

It is assumed that the rinsing stroke is finished to explain the next process, and the door 109 is assumed to be closed.

In step S1, the control means 124 outputs a control signal to the washing motor driving circuit 132 to proceed with the dehydration operation. The washing motor 120 is driven by the control signal to rotate the dehydration tank 105.

In step S2, as shown in FIG. 4A, the housing 101 vibrates as the dewatering tank 105 rotates while the door 109 is closed, and a blocking ball located at the center of the sensing means 114. 148 is shaken. As the blocking ball 148 is shaken, the light of the light emitting unit 144 reaches the phototransistor which is the light receiving unit 146 through the hole of the inclined surface 147. When the phototransistor, which is the light receiving unit 146, is turned on, the transistor T1 that increases the signal sensitivity is turned off to generate a low level signal. Due to the vibration of the blocking ball 148, a signal of a LOW level and a HIGH level is generated alternately. As shown in FIG. 6, the time is from time T0 to time T1.

In step S3, the control means 124 determines whether the door 109 is open. If it is determined that the door 109 is open, the process proceeds to step S4.

In step S4, as shown in FIG. 4B, the blocking ball 148 located in the center of the sensing unit 114 opens the hole of the inclined surface 147 so that the light of the light emitting unit 144 is the light receiving unit 146. To the transistor. When the phototransistor, which is the light receiving unit 146, is turned on, the transistor T1 for increasing signal sensitivity is turned off to generate a low level signal for a predetermined time or more. The setting time is, for example, one second.

The control means 124 receiving the LOW level signal for a predetermined time or more outputs a control signal for stopping the washing motor 120 to the washing motor driving circuit 132. The washing motor 120 is stopped by the control signal. As shown in FIG. 6, the time is from time T1 to time T2.

On the other hand, when the control means 124 determines that the door 109 is not open in step S3, the flow advances to step S5.

In step S5, the control means 124 determines whether the shake amount of the washing tub 105 is greater than the preset shake amount set in the memory 142. If it is determined that the shaking amount of the washing tub 105 is not greater than the set shaking amount, the process proceeds to step S6.

In step S6, the control means 124 outputs a control signal for driving the washing motor 120 to the washing motor driving circuit 132. The washing motor 120 is driven by the control signal, and the rotation speed of the dehydration tank 105 is increased to the set rotation speed by the driving of the washing motor 120 to proceed with the dehydration stroke.

On the other hand, as a result of the control means 124 determines whether the shaking amount of the washing tank 105 is greater than the preset shaking amount set in the memory 142 in step S5, the shaking amount of the washing tank 105 is larger than the set shaking amount. If it is determined that there are many, the flow proceeds to step S7. The number of pulses by the set shake amount is 10 per unit second, for example. As shown in FIG. 6, the time is from time T2 to time T3.

In step S7, the control means 124 outputs a control signal for balancing the laundry cloth in the washing tank 105. The balancing operation is performed by the control signal. When the balancing stroke is completed, the process proceeds to step S1.

As described above, according to the unbalance and door opening and closing detection apparatus of the automatic washing machine according to the present invention, and a method for detecting the same, the assembly labor of the product can be reduced by accurately detecting the unbalance and the opening and closing of the door by one sensing means. It has a very good effect of reducing material costs.

Claims (1)

Detecting means installed at the edge of the door to detect the unbalance of the washing tank generated at the time of dehydration and whether the door is opened or closed at the same time includes a light emitting unit for emitting light; Blocking ball for blocking the light emitted from the light emitting unit by shaking in the sealed container according to the shaking and unopening of the washing tank and the opening and closing of the door, A light-receiving unit for receiving the light emitted from the light-emitting unit when the blocking ball is shaken by shaking and unopening of the washing tank and the door; Unbalance of the automatic washing machine, characterized in that it forms a hole through which the light emitted from the light emitting part passes, and at the same time, the inclined surface is inclined so that the blocking ball is positioned at the set position when the door is open and shaken by the unbalance of the washing tank. And door opening and closing detection device.