JPS62221396A - Dehydration washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is directed to a dehydrating and dehydrating machine equipped with a washing control circuit that is configured by, for example, a microcomputer and executes processes such as washing, rinsing, and dehydrating. Regarding washing machines.

(Conventional technology) In a washing machine with a dehydrator function, the washing tank rotates at high speed during the dehydration operation, so when the lid of the washing tank is opened, the brake solenoid, which is the electric operating source of the brake device, is cut off for safety. It is necessary to activate the brake and stop the washing tank immediately.

Therefore, for example, in a dehydrating/washing machine whose washing control circuit is mainly composed of a microcomputer, a switch element such as a triac, which is controlled on and off by the washing control circuit, is installed in series in the energizing path to the brake solenoid, and a switch element such as a triac that is controlled on and off by the washing control circuit is installed in the power supply path to the brake solenoid. A lid switch is provided to detect this, and when the lid is opened during the dehydration process, a lid open signal is input from the lid switch to the washing control circuit to turn off the triac and cut off the power to the brake solenoid. was common.

(Problems to be Solved by the Invention) However, in the above configuration, the stopping power of the washing tank depends on the microcomputer control, so in the unlikely event that the microcomputer malfunctions or the triac malfunctions. If this happens, the brake solenoid will not be de-energized even if the lid is opened during the dehydration process. In this case, even if the washing tub is spinning when you open the lid, if you insert your hand into the washing tub thinking that it will stop soon, there is a risk of getting caught in the laundry and getting injured. There is sex.

The present invention was made in view of the above circumstances, and its purpose is to improve safety by being able to reliably stop the rotation of the washing tub by opening the lid even in the event of an abnormality in the washing control circuit or switch element. We offer a dehydrating and washing machine.

[Structure of the Invention] (Means for Solving the Problems) The dehydrating and washing machine of the present invention is provided with two lid switches that operate in conjunction with the opening operation of the lid of the washing tub, and one of the lid switches is used for washing. It is provided to be input as a lid opening signal to the control circuit, and is controlled to be turned on and off by the washing control circuit in the energizing path to the electric operation source that brakes the rotation of the washing tub when the other lid switch is cut off. It is characterized by being provided in series with the switch element.

(Function) When the lid is opened during dehydration, two lid switches are activated.

When the washing control circuit and the switching element controlled on/off by the washing control circuit function normally, the electric operating source is turned off by the lid switch connected in series with the current-carrying path or the switching element controlled on/off by the washing control circuit. Electricity is applied, which activates the brakes.

Further, if an abnormality occurs in the washing control circuit or the switch element, the electric power source is cut off by a lid switch provided in its energizing path.

(Example) An example of the present invention will be described below based on FIGS. 1 to 7. First, in Figure 2, 1 is the outer box, 2 is the outer box 1
The water receiving tank 3 suspended therein is a washing tank rotatably disposed within the water receiving tank 2, and the washing tank 3 is provided with an agitator such as a pulsator, although not shown. When performing the dewatering operation, the rotation of the motor 4, which will be described later, is transmitted to the washing tank 3 via a well-known drive control mechanism (not shown), and the washing tank 3 is rotated at a high speed. Further, when performing the electric operations of washing and rinsing, the forward and reverse rotations of the motor 4 are similarly transmitted to the stirring body via the drive control mechanism, and the stirring body is rotated forward and reverse at a low speed. 5 is the lid frame installed on the top of the outer box 1, which costs $1! The i3 lid 6 is rotatably opened and closed via a shaft 6a, and a protruding piece-shaped operator 6b is provided on the right side of the rear end of the lid 6, as shown in FIGS. 3 and 4. are doing. Reference numeral 7 designates a box portion formed at the rear of the lid frame 5, and inside of this, as shown in FIG. 5, a first lid switch 8 and a second lid switch 9 are installed corresponding to the operator 6b of the lid 6. has been established. The first lid switch 8 is constructed by fixing a fixed contact piece 11 and a movable contact piece 12 to a stand 1G made of an insulating material, and the second lid switch 9 is a micro switch fixed to a mounting frame 13. It consists of The second lid switch 9 is configured to turn off when the push button 9a is pressed by a lever 14 that is rotatably supported in the vertical direction on the mounting frame 13, and the lever 14 is always activated by a tension coil spring 15 to keep the push button 9a It is urged to rotate in the direction of arrow 16, which is the direction in which it is pressed.

When the lid 6 is closed, the operator 6b pushes the movable contact piece 12 of the first lid switch 8, as shown in FIG.
The first lid switch 8
and the second lid switch 9 are both turned on. and,
When the lid 6 is opened from this closed state to the position shown by the dashed line in FIG. 2, the movable contact piece 12 separates from the fixed contact piece 11, as shown in FIG.
(at this time, the second lid switch 9 is still in the ON state), and when the lid 6 is further opened to the position shown by the two-dot chain line in FIG. 2, the push button 9a is pressed by the lever 14. , the second lid switch 9 is turned off.

Now, in FIG. 1 showing the electrical configuration, 17 is a power transformer, 18 is a constant voltage power supply circuit, 19 is a waveform shaping circuit,
20 is an initialization circuit, and 21 is a washing control circuit. The washing control circuit 21 includes a microcomputer 22,
It comprises a clock signal generation circuit 23, an input interface circuit 24, and an output interface circuit 25,
The microcomputer 22 stores in advance various washing courses in which steps such as washing, rinsing, and dehydration are executed according to predetermined programs. The output interface circuit 25 performs on/off control of six triacs 26 to 31, and the triac 26 is connected to the washing tank 3.
Provided in the energization path of the cold water supply valve 32 that supplies water to the
The triac 27 is provided in the energizing path of the hot water supply valve 33 that supplies hot water to the washing tank 3, and the triac 28 is provided in the energizing path of the solenoid 34 that controls the injection of finishing agent into the washing tank 3. The triacs 29 and 30 are provided in the current-carrying paths for forward and reverse rotation of the motor 4, respectively, and during the washing operation and the rinsing operation, these triacs 29 and 30 are selectively turned on, so that the motor 4 is turned on. The motor 4 and the washing tank 3 are rotated in one direction by turning on one of the triacs 29 during the dewatering operation.

When the remaining triac 31 and the second lid switch 9 are cut off, the brake solenoid 35 serving as an electric actuation source for braking a brake device (not shown) and the water in the water tank 2 are connected to each other. Drainage pump 3 to discharge
6 in series. That is, the second lid switch 9, the triac 31 and the brake solenoid 3.
5 are connected in series between power supply buses 37 and 38, and a drain pump 36 is connected in parallel with a brake solenoid 35.

On the other hand, the first lid switch 8 is provided to give a lid opening signal to the microcomputer 22 via the input interface circuit 24. 39 is a water level switch, which is turned on when the water level in the washing tank 3 exceeds a predetermined level to give a water supply completion signal to the microcomputer 22.

40 is abnormality 151 while washing tank 3 is performing dehydration operation
This is an abnormal rocking detection switch for giving a signal to the microcomputer 22 to stop the dewatering operation when the spindle moves. Further, a display device u142 41 is a notification circuit that sounds an electronic buzzer (not shown) at the end of the washing operation and when an abnormal situation occurs.

Next, the operation of the above configuration will be explained. Assume that a laundry course in which washing, rinsing, and spin-drying steps are sequentially executed is selected by operating an operation switch (not shown), and a start switch is turned on. Then, the washing process is started, and first, the triacs 26 and 27 are turned on via the output interface circuit 25 in response to a signal from the microcomputer 22, and both water supply valves 32 and 3 are turned on.
3 is energized, and cold water and hot water are supplied into the washing tank 3. When the water level in the washing tank 3 reaches a predetermined level or higher, the water level switch 39 is turned on, so that a water supply completion signal is given to the microcomputer 22, and the washing operation is started. This is carried out by selectively turning on the triac 29 and 30 via the output interface circuit 25, whereby the agitator (not shown) intermittently rotates in forward and reverse directions to wash the laundry in the washing tub 3. be done.

After this, the rinsing process is performed in two parts.

In the rinsing process, first, the triac 31 is turned on and the brake solenoid 35 is energized, thereby putting the brake device in a non-braking state and releasing the restraint on the washing tank 3. At the same time, the drain pump 36 is started to drain the water in the water receiving tank 2. Then, by turning on the triac 29 and driving the motor 4, the washing tank 3 is rotated at high speed, thereby performing a dewatering operation to dehydrate the wash water contained in the laundry in the laundry (washing)-13. be exposed. When this electric operation of draining and dewatering is completed, the triac 26 is turned on to start supplying water, and when a predetermined water level is reached, the water level switch 40 is turned on and the rinsing operation begins. In the rinsing operation, the triacs 29 and 30 are alternately turned on while the water supply valve 32 is opened, and the motor 4 and thus the stirring body are rotated in forward and reverse directions.

When such a rinsing process is performed twice, the process moves to a dehydration process. In this dewatering process, first, the triac 31 is turned on, the brake solenoid 35 is energized, the brake device is put into a non-braking state, the restraint of the washing tank 3 is released, and the drain valve pump 36 is activated to drain the water in the water receiving tank 2. Drain the water.

Next, the triac 29 is turned on continuously to energize the motor 4, thereby rotating the washing tub 3 at high speed and dewatering the laundry inside. The completion of such a dehydration process completes the execution of the entire process.

By the way, during the above-mentioned washing operation, the user may open the lid 6 during the dehydration operation. Then, at the timing of opening the cover 6, first the first lid switch 8 is turned off.
is turned off, and then the second lid switch 9 is turned off. At this time, the washing control circuit 21 and the triac 31
If it functions normally, the triacs 31 and 29 are turned off by the lid opening signal based on the first lid switch 8 being turned off, and thereby the brake solenoid 35 and the motor 4 are cut off. When the brake solenoid 35 is de-energized, a brake device (not shown) enters a braking operation state, and the rotation of the washing tank 3 is stopped. in this case,
Since the first lid switch 8 is turned off before the second lid switch 9 is turned off, there is no risk of the brake being applied while the motor 4 is energized, and if the first lid switch 8 operates to open the lid 6. , it turns off immediately, so the brake can be applied to the washing tank 3 at an early stage. On the other hand, if the off timing of the first and second lid switches 8 and 9 is reversed from this embodiment, the timing at which the brake is applied to the washing tank 3 will be delayed, and when the lid 6 is opened, the washing tank 3 will still be turned off. This may cause the user to be concerned about the possibility of a malfunction due to the rotation, but this problem does not occur in this embodiment.

However, if an abnormality occurs in the microcomputer 22 or triac 31 of the washing control circuit 21,
Even if the first lid switch 8 is turned off, the triac 3
1 does not turn off and maintains its on state. However, since the second lid switch 9 is also turned off together with the first lid switch 8 when the lid 6 is opened 1, the energizing path of the brake solenoid 35 is opened by the second lid switch 9, and therefore the brake solenoid 35 is turned off. When the power is cut off, the rotation of the washing tank 3 is stopped in the same manner as described above. In this way, even if an abnormality occurs in the microcomputer 22 or the triac 31, the rotation of the washing tank 3 can be reliably stopped with the lid 6 open, which improves safety compared to the conventional system. do.

Next, FIGS. 8 and 9 show another embodiment of the present invention, which differs from the above embodiment in the structure of the lid switch.

That is, in this embodiment, the first and second lid switches 42
and 43 are both composed of microswitches fixed to a mounting frame 44. The mounting frame 44 has an operator 6b for the lid 6.
A lever 45 that is rotated by the lever 4 is pivotally supported, and a pivot hole 46 that rotatably supports the lever 45 is pivoted by the lever 4.
It is formed wider than the plate thickness of No. 5. Also, lever 4
5, the first and second lid switches 42 and 4
The side that presses the push button 3 (not shown) is the second switch 4.
It is formed wide with an overhanging portion 45a projecting to the third side. Then, as the lid 6 is opened from the closed position, the operator 6b moves as shown by the two-dot chain line in FIG.
The lever 45 changes from the state in which it is in contact with the entire left and right sides in the figure to the state in which only the left side in the figure is in contact with the operator 6b, as shown by the solid line. While rotating in the direction, the first lid switch 42 side (left side) is located at the top and the second lid switch 43 side (
Since the right side is tilted downward, the first lid switch 42 is first turned off by the lever 45 at the beginning of opening the lid 6, and then the second lid switch 43 is turned off. Even with this configuration, the same effects as in the above embodiment can be obtained.

Incidentally, in each of the above embodiments, the first lid switch 8, 42 is turned off faster than the second lid switch 9, 43, but in the present invention, the washing control circuit 21 or the triac 31
There is no particular need to do this, since it is sufficient to cut off the power to the brake solenoid 35 using the second lid switch 9 when an abnormality occurs. Further, the electric actuation source of the brake device is not limited to a brake solenoid, but may be a motor.

[Effects of the Invention] As described above, the present invention provides two lid switches that open in conjunction with the opening/closing operation of the lid, and one lid switch is provided so as to be input as a lid opening signal to the washing control circuit. In addition, it is characterized in that it is provided in series with a switch element that is controlled on and off by the washing control circuit in the energizing path to the electric operating source that brakes the rotation of the washing tub when the other lid switch is cut off. As a result, even when there is an abnormality in the washing control circuit or switch element, the rotation of the washing tub can be reliably stopped and safety can be improved, which is an excellent effect.

[Brief explanation of drawings]

Figures 1 to 7 show an embodiment of the present invention, Figure 1 is a circuit diagram, Figure 2 is a side view of a washing machine with the upper half cut away, and Figure 3 is with the lid opened. Partial perspective view shown in condition,
Figure 4 is a longitudinal cross-sectional side view of the lid switch part, Figures 5 to 7
The figures are longitudinal sectional front views of the lid switch portion showing the process of opening the lid from the closed position, and FIGS. 8 and 9 are perspective views and FIGS. FIG. In the figure, 3 is a washing tank, 4 is a motor, 6 is a lid, 8 is a first lid switch, 9 is a second lid switch, 21 is a washing control circuit, 22 is a microcomputer, and 31 is a triac (
35 is a brake solenoid (electric actuation source), 42 is a first lid switch, and 43 is a second lid switch. Applicant Toshiba Co., Ltd. Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. A washing machine equipped with a washing control circuit for carrying out processes such as washing, rinsing, and spin-drying, as well as an electric operating source that brakes the rotation of the washing tub when the power is cut off.
Two lid switches are provided that operate in conjunction with the opening operation of the lid of the washing tank, one lid switch is provided to input a lid opening signal to the washing control circuit, and the other lid switch is connected to the electrically operated lid switch. 1. A dehydrating and washing machine, characterized in that a switch element which is controlled to be turned on and off by the washing control circuit is provided in series with a current supply path to an operating source.