JPS6210677B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fully automatic washing machine operating device equipped with a plurality of state detection switches such as a water level switch, a lid switch, and an abnormal dehydration detection switch.

Conventionally, fully automatic washing machines have been provided that use microcomputers such as LSI instead of the traditional mechanical timer devices, and these are used to monitor the status of water level switches, lid switches, abnormal dehydration detection switches, etc. Timing progress is performed based on the opening and closing of the detection switch. For example, in the washing process, timing progress is started and washing is executed on the condition that the water level switch is closed, and in the dewatering process, the timing is started on the condition that the water level switch is closed, and the lid switch is closed in the dewatering process. is closed and the abnormal dehydration detection switch is open, timing progress is started to execute dehydration, and when the lid switch is opened in the middle of the dehydration process or the abnormal dehydration detection switch is closed. It is designed to sometimes stop the timing progression and stop dehydration. However, in the conventional configuration described above, when inspecting the functional state of the microcomputer before installing it in a washing machine, the opening/closing state of the water level switch, lid switch, or abnormal dehydration detection switch is changed depending on the program progress state of each process. Since a simulated signal must be generated and applied to each switch connection of the microcomputer, inspection is troublesome, and the operating status is inspected after the microcomputer is assembled into a washing machine and the product is assembled. In such cases, it is impossible to give the above-mentioned simulated signals to the microcomputer, so it is necessary to actually supply water to operate the microcomputer. In particular, when inspecting the dehydration process, it is necessary to open and close the There is a problem in that when the lid is opened, the lid switch opens and dehydration stops, and it is therefore difficult to find the location of the failure when repairing the problem.

The present invention has been made in view of the above circumstances, and its purpose is to provide a state detection unit that outputs the open/close states of a plurality of state detection switches such as a water level switch, a lid switch, and an abnormality detection switch as the presence or absence of a state detection signal. A series of steps from washing to spin-drying is automatically executed by timing progression, and each step is provided with a state reference signal indicating the normal opening/closing state of the plurality of condition detection switches in that step. The device is provided with a program progressing section that outputs the presence/absence of the state detection signals corresponding to the plurality of state detection switches and the presence/absence of the state reference signal, and when the respective sets match, the allowable signal is outputted to the program. A signal comparing section is provided which supplies a stop signal to the program proceeding section to cause the program to proceed, and when even one set does not match, causes the program proceeding section to stop the program by giving a stop signal to the program proceeding section, and separate from the signal comparing section, the program proceeding section By arranging a test switch which manually provides a test signal similar to the allowable signal, the functional state of the program progressing section can be tested with a simple operation of manually operating the test switch. In addition to being able to inspect the operating status without supplying water or with the lid open, this fully automatic washing machine allows for easy detection of malfunctions when repairs are made. To provide driving equipment.

An embodiment of the present invention will be described below with reference to the drawings.

1 is a program setting section, which has a large number of push button switches, and by selectively pressing these push button switches, a standard course consisting of a series of steps from washing to dehydration, and from this standard course. It is possible to select and set various courses such as a short saving course, a drainage stop course that stops after the final rinse, a washing only course, a draining only course, and a dewatering only course, and the course according to the set course. A selection signal is generated from the output terminal. The output terminal of the program setting section 1 is connected to the input terminal 2a of the program proceeding section 2. This program progress section 2 is composed of a microcomputer configured with an LSI or the like, and receives a drive command signal from an output terminal 2b in order to execute a course corresponding to a course selection signal given to an input terminal 2a based on the program progress. It is starting to occur. The program progress section 2 also has a display signal terminal 2c connected to the input terminal of the display section 3, and outputs a display signal corresponding to the process being executed from the display signal terminal 2c to display the display section 3. 3, a display element such as a lamp or a light emitting diode corresponding to the stroke is turned on. Further, the output terminal 2b of the program progression unit 2 is connected to the input terminal of a drive circuit 5 via an amplifier circuit 4, and the drive circuit 5 is connected to a water supply solenoid valve, a drainage solenoid valve, and a drive motor (both The load corresponding to the drive command signal applied to the input terminal of the load (not shown) is energized to execute the stroke. On the other hand, the program proceeding section 2 has a state reference signal terminal 2d consisting of three reference signal terminals 2d ₁ to 2d ₃ that generate state reference signals as described later, and is supplied with an allow signal and a stop signal as described later. It has a control terminal 2e, and the reference signal terminals 2d ₁ , 2d ₂ and 2d ₃ are connected to three input terminals 6a ₁ , 6a ₂ and 6a ₃ of the first comparison input terminal 6a of the signal comparison section 6, respectively. The control terminal 2e is connected to a movable contact piece c of an inspection switch 7 consisting of a changeover switch. One fixed contact piece a of this test switch 7 is connected to the test terminal 8, and the other fixed contact piece b is connected to the output terminal 6b of the signal comparison section 6. on the other hand,
The signal comparison section 6 includes an exclusive OR circuit 9
11 and a NOR circuit 12, one input terminal of each of the exclusive OR circuits 9, 10 and 11 is connected to the input terminals 6a ₁ , 6a ₂ and 6.
a ₃ respectively, and the other input terminals of the exclusive OR circuits 9, 10 and 11 are branched into two, and the first branch ends are connected to each other through resistors 13, 14 and 15, respectively. grounded, each second
The branch ends of are connected to three input terminals 6c ₁ , 6c ₂ and 6c ₃ of the second comparison input terminal 6c, respectively.
And the exclusive OR circuits 9 and 10
and 11 are respectively connected to the three input terminals of the NOR circuit 12, and the output terminal of the NOR circuit 12 is connected to the output terminal 6b. 1
Reference numeral 6 denotes a state detection section, which includes a water level switch 17, a lid switch 18, and an abnormal dehydration detection switch 19 as state detection switches. In this case, as is well known, the water level switch 17 detects the water level in a water receiving tank and a rotating tank (none of which is shown) that is a washing and dehydrating tank disposed inside the water tank and adjusts the water level to a specified water level. The lid switch 18 opens and closes in conjunction with the opening and closing of the opening/closing lid (not shown) provided above the water receiving tank and rotating tank. The abnormal dehydration detection switch 19 normally returns to the open state, and closes when the rotary tub is rotated, that is, during dewatering, when the rotary tub swings abnormally due to imbalance of the internal washing machine. It is. And these water level switches 17,
One end of each of the lid switch 18 and the abnormal dehydration detection switch 19 is connected to the input terminals 6c ₁ , 6c ₂ and 6c ₃ , and the other end of each is connected in common, and the common connection point is connected to the positive power source. It is connected to a power supply terminal 20 to which voltage +V is applied.

Next, the operation of this embodiment having the above configuration will be explained.

Now, by manual operation, contact c of inspection switch 7 is
- b, and select and press the push button switch in the program setting section 1 to set, for example, a standard course, the program proceeding section 2 receives the course selection signal of this standard course and sends the signal to the control terminal 2e. While the permission signal described later is given, the timing is advanced to "wash", "drain", "spin", "rinse", "drain", "spin", "
A drive command signal is generated from the output terminal 2b to automatically execute each process of "rinsing", "draining", and "dewatering" sequentially, and the reference signal terminals 2d ₁ , 2d ₂ and 2d of the condition reference signal terminal 2d From ₃ onwards, for each of the above-mentioned strokes, the normal opening/closing states of the water level switch 17, lid switch 18, and abnormal dehydration detection switch 19 are outputted as the presence or absence of a state reference signal. To explain this in detail, when a course selection signal for the standard course is given to the input terminal 2a of the program progression section 2, the content of the program progression section 2 becomes a "wash" process, and the first step is to drive the solenoid valve for water supply. A command signal is output from the output terminal 2b to operate the water supply solenoid valve in response to the command signal, and the water supply solenoid valve starts supplying water into the water receiving tank and the rotating tank. In addition, the program progress section 2 controls the water level switch 1 in the "washing" process.
7. Lid switch 18 and abnormal dehydration detection switch 1
9, the water level switch 17 should be in the closed state, the lid switch 18 should be in the closed state, and the abnormal dehydration detection switch 19 should be in the open state. The logic signal “1” is sent to the reference signal terminal 2d ₁ as the water level status reference signal “present” corresponding to the closing of the water level switch 17.
, a logic signal "1" is generated from the reference signal terminal _2d2 as a lid state reference signal "present" corresponding to the closing of the lid switch 18, and an abnormal dehydration detection switch 19 is output.
A logic signal "0" is generated as the dehydration state reference signal "absence" corresponding to the opening of the dehydration state reference signal, and these signals are applied to one input terminal of exclusive OR circuits 9, 10 and 11, respectively. On the other hand, in reality, since water is currently being supplied to the water receiving tank and rotating tank, the water level switch 17 is
is in the open return state, the lid switch 18 is in the closed state because the open/close lid is in the closed state, and the abnormal dehydration detection switch 19 is in the open return state because no dehydration abnormality has occurred. Therefore, since the water level switch 17 and the abnormal dehydration detection switch 19 are open, the resistors 13 and 1
5, no current flows and no voltage drop occurs between its terminals, and this causes the logic signal "0" as the water level state detection signal "absence" and the logic signal "0" as the dehydration state detection signal "absence", respectively. '' is applied to the other input terminals of the exclusive OR circuits 9 and 11, and since the lid switch 18 is closed, current flows through the resistor 14 and a voltage drop occurs between its terminals, which causes a lid state. It is applied to the other input terminal of the exclusive OR circuit 10 as a logic signal "1" indicating that the detection signal is "present." As a result, in the exclusive OR circuit 9, since the input signals are the water level state reference signal "1" and the water level state detection signal "0" (both do not match), the output signal becomes "1" as a logical signal, and the In the exclusive OR circuit 10, since the input signals are the lid state reference signal "1" and the lid state detection signal "1" (both match), the output signal is a logic signal "0", and the exclusive OR circuit 10 In No. 11, since the input signals are the dehydration state reference signal "0" and the dehydration state detection signal "0" (both match), the output signal is a logic signal and becomes "0". Therefore, in the NOR circuit 12, the input signal is "1",
By becoming “0” and “0”, the output signal becomes “0”
Then, the output signal "0" is given to the control terminal 2e of the program progressing section 2 as a stop signal via the contacts b and c of the test switch 7.
When a stop signal is applied to the control terminal 2e, the program progression unit 2 does not start timing progression and remains stopped. After that, when the water level in the water receiving tank and rotating tank reaches the specified level, the water level switch 17
is detected and closed, a voltage drop occurs across the resistor 13, and the water level state detection signal becomes "1" indicating "present", and the input signal in the exclusive OR circuit 9 also changes to the water level state reference signal "1". ” and water level state detection signal “1” (both match), the output signal becomes “0”, and in the NOR circuit 12, when the input signal becomes “0”, “0”, “0”, the output signal becomes “0”. The signal becomes "1", and this output signal "1" is applied to the control terminal 2e of the program progressing section 2 as a permission signal via the contacts b and c of the test switch 7. When a permission signal is given to the control terminal 2e, the program progression unit 2 starts timing progression and executes washing as is well known. Thereafter, when the program progression section 2 moves to the "drainage" process, the program progression section 2 generates a drive command signal corresponding to the drainage solenoid valve from the output terminal 2b, and operates the drainage solenoid valve in response to this, The drainage electromagnetic valve drains water from the water receiving tank and the rotating tank. In addition, the program proceeding section 2 uses the reference signal terminals 2d ₁ and 2d because the water level switch 17 should be open, the lid switch 18 should be closed, and the abnormal dehydration detection switch 19 should be open in this "draining" process. ₂ and _2d3 , a water level state reference signal "0", a lid state reference signal "1" and a dehydration state reference signal "0" are generated. In this case, in reality, at the beginning of drainage, the water level switch 17 is in the closed state and the water level state detection signal is "1", so the output signal of the exclusive OR circuit 9 is "1". The NOR circuit 12 has an output signal of "0" and generates a stop signal. Therefore, the program progression unit 2 stops timing progression.
After that, when the water level in the water receiving tank and rotating tank reaches the return level due to drainage, the water level switch 17 detects this and returns to the open state, so the water level state detection signal becomes "0" and the NOR circuit 12 outputs an output signal. becomes "1" and generates a permission signal. Therefore, the program progression unit 2 starts timing progression again, and moves to the next "dehydration" process after a predetermined time. In the "dewatering" process, the program progressing section 2 generates a drive command signal corresponding to the drain electromagnetic valve and the drive motor from the output terminal 2b to execute the dehydration, and also outputs a drive command signal from the output terminal 2b to the reference signal terminals 2d ₁ and 2d _{2 .}
and _2d3 , a water level condition reference signal "0", a lid condition reference signal "1" and a dehydration condition reference signal "0" are generated. In this case, in reality, in the normal state, the water level switch 17 is open, the lid switch 18 is closed, and the abnormal dehydration detection switch 19 is open, so the water level state detection signal is "0" and the lid state detection signal is "0". is "1" and the dehydration state detection signal is "0", and the exclusive OR circuits 9, 10 and 11
Each output signal of becomes "0", therefore, NOR circuit 1
2, the output signal becomes "1" and a permission signal is generated, and the program progression section 2 continues the timing progression. During such dehydration, when the opening/closing lid is opened, the lid switch 18 is opened and the lid state detection signal becomes "0", so the NOR circuit 12 generates a stop signal of output signal "0", In addition, when the rotating tank abnormally swings, the abnormal dehydration detection switch 19 is closed and the dehydration state detection signal becomes "1", so the NOR circuit 12 outputs the output signal "0".
In either case, the program progression section 2 stops the timing progression and stops the generation of the drive command signal from the output terminal 2b. In such a case, dewatering can be restarted by closing the opening/closing lid or correcting the unbalance of the laundry in the rotating tub. Thereafter, in the same manner, the steps of "rinsing" similar to the "washing" step, "draining" similar to the above, "dehydrating", "rinsing", "draining" and "dehydrating" are performed in sequence, and washing is carried out according to the standard course. Driving ends.

The above description is based on the case where the standard course is set by the program setting unit 1, but even if another course is set, the reference signal terminal 2 of the program progression unit 2 is used for each stroke of the course.
d ₁ , 2d ₂ and 2d ₃ output the presence/absence of the water level condition reference signal, lid condition reference signal and dehydration condition reference signal as logic signals "1" and "0", and these are the actual water level condition detection signal and lid condition reference signal. The presence/absence of the state detection signal and the dehydration state detection signal are compared with the logic signals "1" and "0", and in the comparison of these three sets, if all three sets match, a permission signal is given to the program proceeding section 2 and the corresponding signal is detected. The program progression section 2 advances the timing, and when one of the three sets does not match, a stop signal is given to the program progression section 2, and the program progression section 2 stops the timing progression.

Now, a case will be described in which the functional state of the program progressing section 2 or the operating state of the program progressing section 2 is inspected after it is installed in a washing machine. The test terminal 8 is connected, for example, to the DC power supply of the program progression unit 2 via a resistor, and the test terminal 8 is connected to the output terminal 6 of the signal comparison unit 6.
A check signal of logic signal "1" similar to the allowable signal of output signal "1" outputted from b is always given. Therefore, when performing an inspection, for example, a standard course is set using the program setting section 1, and when the contacts ca and a of the inspection switch 7 are manually closed, the control terminal 2e of the program proceeding section 2 is The test signal (logic signal "1" similar to the allowable signal) of the test terminal 8 is now constantly applied to the test switch 7 between the contact pieces a and c, and therefore the program proceeding section 2 is connected to the water level switch 17, A drive command signal for each load is generated from the output terminal 2b by advancing the timing regardless of the actual open/close states of the lid switch 18 and the abnormal dehydration detection switch 19. As a result, by checking the state of the drive command signal from the output terminal 2b of the program progressing section 2, it is possible to check the functional state of the program progressing section 2 to determine whether it functions normally. Whether or not the loads such as the drainage electromagnetic valve and the drive motor operate normally based on the drive command signal from the output terminal 2b of the advancing section 2, and whether the stirring blades and the rotating tank rotate normally accordingly. The operating condition can be inspected by checking whether the

As described above, according to this embodiment, the program progressing section 2 sends the open/close states of the water level switch 17, lid switch 18, and abnormal dehydration detection switch 19 that should be normal for each stroke as the water level state reference signal and the lid state as the water level state reference signal. The reference signal and the dehydration state reference signal are output as logical signals "1" and "0" states, and on the other hand, the state detection unit 16 detects the actual open/close states of the water level switch 17, lid switch 18, and abnormal dehydration detection switch 19. The signal, lid state detection signal, and dehydration state detection signal are output as logic signals "1" and "0" states, and these are compared for each set by the signal comparison section 6. When each set matches, a logic signal "1" and "0" is output. It outputs an acceptance signal of ``1'' and outputs a stop signal of logic signal ``0'' when even one pair does not match.
These permission signals and stop signals are given to the program progression section 2 through contacts b and c of the inspection switch 7, and when the permission signal is given to the program progression section 2, the timing advances, and when the stop signal is given, the program progress section 2 It is configured to stop the timing progression, and when the contact c and a of the test switch 7 are closed, a test signal of logic signal "1" similar to the allowable signal is sent from the test terminal 8 to the program progress section 2. The configuration is such that it gives the following. Therefore, when inspecting the functional state of the program progressing section 2, it can be done simply by manually closing the contacts ca of the inspection switch 7. There is no need to provide simulated signals indicating the open/close states of the lid switch 18 and abnormal dehydration detection switch 19 as the timing progresses.
It can be done with simple operations. Furthermore, even when the program progressing section 2 is incorporated into a washing machine and its operating condition is to be inspected, the water level switch can be turned off simply by manually closing the contacts c and a of the inspection switch 7. 17. It is possible to advance the timing of the program progression section 2 regardless of the actual open/closed states of the lid switch 18 and the abnormal dehydration detection switch 19. Therefore, unlike the conventional system, there is no water in the water receiving tank and the rotating tank. The operating condition can be inspected even without actually supplying water and with the lid open, and it is particularly easy to find a faulty part when repairing a fault in a general household.

Note that the present invention is not limited to the embodiments described above and shown in the drawings; for example, the state detection switches include the water level switch 17 and the lid switch 18.
Of course, the present invention is not limited to the abnormal dehydration detection switch 19, etc., and may be modified as appropriate without departing from the spirit of the invention.

The present invention as described above makes it possible to inspect the functional status of the program progression section with a simple operation of manually operating the inspection switch, and also allows the inspection of the functional status of the program progression section without supplying water and with the opening/closing lid open. To provide a fully automatic operating device for a fully automatic washing machine which has excellent effects such as being able to inspect the operating state even when the washing machine is left open, and easily finding a faulty part when repairing a fault.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a wiring diagram of the main parts of the same embodiment. In the drawing, 1 is a program setting section, 2 is a program progress section, 5 is a drive circuit, 6 is a signal comparison section, 7 is a test switch, 8 is a test terminal, 16 is a state detection section, and 17 is a water level switch (state detection switch). ),
Reference numeral 18 indicates a lid switch (state detection switch), and 19 indicates an abnormal dehydration detection switch (state detection switch).

Claims (1)

[Claims] 1. A state detection unit that outputs the open/close states of multiple state detection switches such as a water level switch, a lid switch, and an abnormal dehydration detection switch as the presence or absence of a state detection signal, and a timing system that detects the set process from washing to dehydration. A fully automatic washing machine comprising: a program progression section that automatically executes the program according to the progress of the washing machine; and outputs the open/close states of the plurality of state detection switches that should be normal in each cycle as the presence or absence of a state reference signal. In the operating device, the presence/absence of each state detection signal corresponding to the plurality of state detection switches and the state reference signal is compared, and when each set matches, an allowable signal is given to the program progressing section to cause the program to progress. a signal comparison section that supplies a stop signal to the program progression section to stop the program progression when there is a mismatch in even one set of executions; A fully automatic washing machine operating device comprising an inspection switch that is manually operated.