JP2017153834A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine which has enhanced safety with an inexpensive structure which does not depend only on software.SOLUTION: In a dewatering step, when a washing lid 6 comes into an open state, by interlocking with an output signal from lid opening/closing detection means 27, a bi-directional thyristor 25, a transistor 26 and the like of load driving means 24 are operated, and the operation of a drain valve 5 and a motor 4 is stopped. At the same time, control means 31 determines that the washing lid 6 has come into an open state, and stops the operation of the drain valve 5 and the motor 4. With this constitution, a double safety constitution is achieved in which a safety operation for stopping the rotation of a washing and dewatering tub 1 when the washing lid 6 comes into an open state is not only entrusted to software of the control means 31. Thus, safety can be further enhanced at low cost.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a washing machine that performs washing, rinsing, and dehydration processes.

  Conventionally, this type of washing machine has been proposed to detect the opening and closing of a lid using a lid detection switch, a magnet, and a reed switch (see, for example, Patent Document 1).

  3 is a longitudinal sectional view of a conventional washing machine described in Patent Document 1, FIG. 4 is a circuit block diagram of the washing machine, and FIG. 5 is a signal time chart when the lid of the washing machine is opened and closed. .

  3, 4, and 5, the outer tub 22 includes the washing / dehydrating tub 1 rotatably, and is suspended from the washing machine body 7 by a vibration isolator 23.

  The washing and dewatering tub 1 is provided with a stirring blade 2 rotatably at the bottom, decelerates the driving force from the motor 4 via the speed reduction mechanism 3, transmits the driving force to the stirring blade 2 during washing, and dehydration. It is transmitted to the washing and dewatering tank 1. Switching between dewatering and washing at this time is performed by driving the drain valve 5, and when the drain valve 5 is driven, the washing water is drained and the clutch of the speed reduction mechanism 3 is switched to perform the dewatering operation.

  The washing lid 6 has a folding structure with a hinge at the center and covers the upper surface opening of the washing machine body 7. The lid detection switch (second lid detection means) 8 is a bearing portion of the laundry lid 6. A contact 6 is opened and closed according to the opening and closing of the laundry lid 6 by a lever 6b provided near 6a.

  The control device 17 having the control means 11 is disposed in the operation display unit 10 on the upper front surface of the washing machine body 7 and is connected to the motor 4 and the drain valve via the power switching means 12 constituted by a bidirectional thyristor or the like. 5. Control the water supply valve 13 and the like to sequentially control a series of steps of washing, rinsing and dehydration.

  The operation display means 14 inputs operation settings such as washing, rinsing and dehydration, and displays the operation state. The water level detection means 15 detects the water level in the washing and dewatering tub 1 and inputs the output to the control means 11 so that water can be supplied to a predetermined water level.

  The reed switch (first lid detecting means) 16 is mounted on the printed wiring board 18 of the control device 17 disposed on the upper surface of the washing machine body 7, and is a magnet attached to the tip of the washing lid 6. It turns on when 19 approaches (when the washing lid 6 is closed) and turns off when the magnet 19 leaves (when the selection lid 6 is opened). The lid detection switch (second lid detection means) 8 is turned on when the washing lid 6 is closed, and is turned off when the washing / dehydrating tub 1 is abnormally vibrated.

  As described above, the control means 11 controls a series of steps of washing, rinsing, and dehydration. Further, when either the reed switch 16 or the lid detection switch 8 is turned off, the washing lid 6 is opened. Judgment is made. Further, when the reed switch 16 is turned on and the lid detection switch 8 is temporarily turned off for a predetermined time or less, it is determined that the washing and dewatering tub 1 is abnormally vibrating.

In the above configuration, when the setting of the dehydration operation is input from a switch (not shown) of the operation display means 14 or when the dehydration process is entered in the fully automatic operation, the control means 11 is connected to the drain valve via the power switching means 12 5. The motor 4 is driven and the washing and dewatering tub 1 rotates via the speed reduction mechanism 3. At this time, since the washing lid 6 is closed, the lid detection switch 8 and the reed switch 16 are on.

  When the user opens the washing lid 6 during the dehydrating operation, the reed switch 16 is first turned off as shown in FIG. 5A, and then the lid detecting switch 8 is turned on as shown in FIG. 5B. Turn off. The control means 11 determines that the washing lid 6 is open at the point C in FIG. 5A, stops the rotation of the motor 4, and stops the driving of the drain valve 5. When driving of the drain valve 5 is stopped, a brake mechanism (not shown) in the speed reduction mechanism 3 works, and the washing and dewatering tub 1 is decelerated and stopped.

JP-A-7-124380

  However, in the above-described conventional configuration, the operation of the motor, the drain valve and the like via the lid switching state and the power switching means are all performed by control means consisting of a microcomputer, that is, software. The configuration depends on the reliability. For this reason, there is a problem that safety may not be ensured when a component failure or a soft bug occurs.

  The present invention solves the above-described conventional problems. When the lid is opened while the washing and dewatering tub is rotating in the dehydration process, the load driving means is linked to the output signal from the lid open / close detection means. The operation of the washing and dewatering tub is stopped and the control means determines the open state of the lid and stops the rotation of the washing and dewatering tub so that the safe operation is not left to the software of the control means alone. An object of the present invention is to provide a washing machine that is inexpensive and has improved safety by adopting a heavy safety configuration.

  In order to solve the above-described conventional problems, a washing machine of the present invention includes a washing machine body, an outer tub that is supported in an anti-vibration manner in the washing machine body, and a washing and washing machine that is rotatably disposed in the outer tub. A dehydrating tub, a motor that rotationally drives the washing / dehydrating tub, a laundry lid that covers the clothes input opening formed in the washing machine main body so as to be openable and closable, and a lid open / close detection means that detects an open / closed state of the laundry lid A load driving means for driving the motor; and a control device having a control means for controlling the load driving means and the like to control the washing process, wherein the control apparatus opens the washing lid during the dehydration process. When the state is reached, the load driving means is operated in conjunction with the output signal from the lid opening / closing detection means to stop the operation of the motor, and at the same time, the control means causes the washing lid to be in an open state. It is determined that the motor It is obtained by constituting the operation to stop.

  As a result, the safety operation for stopping the rotation of the washing and dewatering tub when the lid is opened can be made a double safety configuration that does not leave only to the software of the control means, and it is cheaper and more secure. be able to.

  The washing machine of the present invention can have a double safety configuration in which the safe operation of stopping the rotation of the washing and dewatering tub when the lid is opened is not left to the software of the control means. Safety can be increased.

The longitudinal cross-sectional view of the washing machine in embodiment of this invention Block diagram of the washing machine Vertical section of a conventional washing machine Block diagram of the washing machine (A) (b) Signal time chart when opening and closing the lid of the washing machine

  1st invention is a washing machine main body, the outer tub supported by the vibration proof in the said washing machine main body, the washing | cleaning and dehydration tank rotatably arrange | positioned in the said outer tub, and rotating the said washing and dehydration tub A motor to be driven, a laundry lid that covers the clothes opening formed in the washing machine main body so as to be openable and closable, a lid open / close detection means for detecting an open / closed state of the laundry lid, a load drive means for driving the motor, A control device having a control means for controlling the load driving means and the like and controlling a washing process, and the control apparatus detects the lid opening / closing detection means when the washing lid is opened in the dehydration process. The load driving means is operated in conjunction with an output signal from the motor to stop the operation of the motor, and at the same time, the control means determines that the washing lid is in an open state, and Configured to stop operation A.

  With this configuration, when the lid is opened while the washing / dehydrating tub is rotating in the dehydration process, the control device operates the load driving means in conjunction with the output signal from the lid opening / closing detection means, and the washing / dehydrating tub. And the control means determines the open state of the lid and stops the rotation of the washing and dewatering tub so that the safe operation is not entrusted only to the software of the control means. It is possible to provide a washing machine that is inexpensive and has higher safety.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention, and FIG. 2 is a block circuit diagram of the washing machine.

  1 and 2, the control device 30 having the control means 31 is disposed inside the operation display unit 10 on the upper front surface of the washing machine body 7, and includes bidirectional thyristors 25-a to 25-d and a transistor 26. By controlling the motor 4, the drain valve 5, the water supply valve 13 and the like through the load driving means 24 constituted by -a to 26-f, the series of steps of washing, rinsing and dehydration are sequentially controlled. Yes.

  The lid opening / closing detection means 27 uses a magnetoresistive element whose resistance value changes according to the magnetic flux density. When the magnet 19 attached to the tip of the washing lid 6 approaches, the magnetic resistance increases with the increase of the magnetic flux density. The resistance value of the element increases, and when separated, the magnetic flux density decreases and the resistance value of the magnetoresistive element decreases.

  Further, the lid opening / closing detection means 27 constitutes a bridge circuit using a magnetoresistive element and a comparison circuit. When the resistance value of the magnetoresistive element becomes a specified value, the output signal becomes Hi, and when the resistance value is less than that, the output signal Becomes Low.

  The output signal of the lid opening / closing detection means 27 is input to the control means 31 via the transistor 26-f, and the signal is transmitted to the transistor 26-d via the transistor 26-e.

  The control device 30 includes a microcomputer (not shown) constituting the control means 31, a display light emitting diode (not shown) constituting the operation display unit 10, and a switch (not shown) on the printed wiring board 32. In addition to the resistor (not shown) and the capacitor (not shown), the load driving means 24 and the lid opening / closing detection means 27 described above are mounted.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated.

  When the user inputs the setting of the dehydration operation to the control device 30 via the operation display unit 10 or enters the dehydration process in the fully automatic operation, the control means 31 is connected to the bidirectional thyristor via the transistor 26-d. 25-d is turned on, the drain valve 5 is driven to open, and a brake mechanism (not shown) in the speed reduction mechanism 3 is released.

  Next, the control means 31 turns on the bidirectional thyristor 25-a via the transistor 26-a to drive the motor 4, and rotationally drives the washing and dewatering tub 1 via the speed reduction mechanism 3. At this time, the Hi signal (5 V) is output as the output signal of the lid opening / closing detection means 27, and the pnp transistor 26-f is OFF, so that the input signal to the control means 31 being pulled down is Low.

  When the user opens the washing lid 6 during the dehydrating operation, the magnet 19 moves away from the lid opening / closing detection means 27, so that the magnetic flux density around the magnetoresistive element decreases and the resistance value decreases. At this time, since the lid opening / closing detection means 27 is set so that the output signal becomes Hi when the opening dimension of the lid tip is 30 mm or less, the lid opening / closing detection means 27 when the opening dimension of the lid tip exceeds 30 mm. Is low, the transistor 26-F is turned ON, and the input signal to the control means 31 is Hi (5 V). Since this signal is connected to the base of the npn transistor 26-e, the transistor 26-e is turned on, and the base of the npn transistor 26-d is Low.

  When the transistor 26-d is turned off, the bidirectional thyristor 25-d is turned off, so that the energization to the drain valve 5 is cut off. When the drain valve 5 stops, the brake mechanism in the speed reduction mechanism 3 works, and the rotation of the washing and dewatering tub 1 is decelerated and stopped.

  At the same time, the control means 31 determines that the washing lid 6 is opened when the input signal from the lid open / close detection means 27 becomes Hi, sets the output signal to the motor 4 and the output signal to the drain valve 5 to Low, and the transistor The bidirectional thyristors 25-a and 25-d are turned off via 26-a and 26-d to cut off the power supply to the load such as the motor 4.

  As described above, in the present embodiment, the bidirectional thyristor 25 of the load driving unit 24 is interlocked with the output signal from the lid opening / closing detection unit 27 when the washing lid 6 is opened in the dehydration process. In addition, the transistor 26 and the like are operated to stop the operation of the drain valve 5 and the motor 4, and at the same time, the control means 31 determines that the washing lid 6 has been opened, and the operation of the drain valve 5 and the motor 4 Is configured so that the safe operation of stopping the rotation of the washing and dewatering tub 1 when the washing lid 6 is in an open state is not left to the software of the control means 31 alone. It is inexpensive and can increase safety.

  In this embodiment, the rotation of the washing and dewatering tub 1 is stopped by inputting the signal of the lid opening / closing detection means 27 to the drive circuit of the drain valve 5, but it is also input to the drive circuit of the motor 4. By stopping the operation of the motor 4, the safety can be further improved.

As described above, the washing machine according to the present invention has a double safety configuration in which the safety operation for stopping the rotation of the washing and dewatering tub when the washing lid is opened is not entrusted only to the software of the control means. Therefore, it is possible to increase the safety at a lower cost, and therefore, the present invention can be applied to other uses of the washing machine having the lid opening / closing detection means.

DESCRIPTION OF SYMBOLS 1 Washing and dewatering tank 4 Motor 5 Drain valve 6 Washing lid 7 Washing machine main body 10 Operation display part 22 Outer tank 24 Load drive means 25-a-25-d Bidirectional thyristor 26-a-26-f Transistor 27 Cover open / close detection Means 30 Control device 31 Control means

Claims (1)

A washing machine main body, an outer tub supported by vibration isolation in the washing machine main body, a washing / dehydrating tub rotatably disposed in the outer tub, a motor for rotationally driving the washing / dehydrating tub, A laundry lid for freely opening and closing a clothing input opening formed in the washing machine main body, a lid open / close detecting means for detecting an open / closed state of the laundry lid, a load driving means for driving the motor, the load driving means, etc. And a control device having a control means for controlling a washing process, and the control apparatus is linked to an output signal from the lid opening / closing detection means when the washing lid is opened during the dehydration process. The load driving means is operated to stop the operation of the motor, and at the same time, the control means determines that the washing lid is opened and stops the operation of the motor. Configured washing machine.

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