JPS5949038B2 - Fully automatic washing machine control device - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a control device for a fully automatic washing machine. Conventionally, fully automatic washing machines that select a desired washing course from among a plurality of washing courses have been provided, but since a push button switch is used as a selection device for selecting a desired washing course, the push button switch section There is a risk that water may enter the control circuit and cause the control circuit to malfunction. In addition, if the push button switch is installed out of position, it may not be possible to operate the push button switch, and since the push button switch has a movable part, its operation is unstable and reliability is low. Also, in devices that use contact switches instead of pushbutton switches to prevent water from entering, malfunctions may occur if multiple switches are touched at the same time. The present invention aims to provide a control device for a fully automatic washing machine that uses contact switches to prevent water from entering circuit parts, and at the same time does not malfunction even if a plurality of switches are touched by mistake. The purpose is The present invention was invented in view of this point, and one embodiment thereof will be described below with reference to the drawings. FIG. 1 shows a control device, which includes a plurality of contact plates A to H for selecting off and different types of washing courses, a detection circuit 1 for detecting contact signals from each contact plate, and a detection circuit 1 for detecting contact signals from each contact plate. an encoder 2 that converts the output into a binary code, a binary counter 3 that counts tally pulses, and a binary counter that compares the setting code of the encoder 2 and the counting code of the binary counter 3 until the counting code matches the setting code. 3, a decoder 5 that converts the memory output of the binary counter 3 into a decimal code, and a drive circuit 6 that switches setting switches using the output of the decoder 5.
It consists of The contact plates listed above are, in the order of numbers, cut, pre-wash course, standard course, economizing course, wash only, rinse to spin-dry, spin-dry only,
It is for drainage only. The detection circuit 1 also includes a detection circuit 10 that includes a detection transistor 7 connected to its base with a corresponding contact plate, an integration circuit 8 that operates when the transistor is conductive, and a switch transistor 9 that conducts with the integrated voltage. They are provided according to the number of contact plates. The alphabet after the number in FIG. 1 corresponds to the contact plate with the same alphabet (the same applies hereinafter).Next, the encoder 2 has an OR circuit 11 that generates a timing pulse when one or more detection signals appear, and an OR circuit 11 that generates a timing pulse when one or more detection signals appear. The data selector 12 selects a binary setting code based on the arrival of two detection signals and a timing pulse. In this embodiment, the semiconductor integrated circuit M5 manufactured by Mitsubishi Electric Corporation incorporates the data selector 12 and the comparison circuit 4.
The binary counter 3 using the 3351P includes an initial state setting circuit 13, a counter circuit 14 that is set to the initial state when the power is turned on by the circuit, and an AND circuit 16 that passes the clock pulse 15 when the timing pulse arrives. It has an AND gate 17 that allows the output (clock pulse) from the AND circuit 16 to pass through as the Y output of the comparison circuit 4. Further, the drive circuit 6 has control transistors 25, 26a to 26h for controlling the relay coils 17 to 24, respectively, and the base of the control transistor 25 corresponds to the timing pulse from the encoder 2 and the contact plate A from the decoder 5. The output of the AND circuit 27 which inputs the output (0) is applied, and the control transistors 26a, 26b, 26e, 2
6h (7) base has the output (0) of decoder 5, respectively.
(2). (3), (4), and (7) are applied. Further, the output (6) or (7) of the decoder 5 is applied to the base of the control transistor 26g via the OR circuit 28, and the output (6) or (7) of the decoder 5 is applied to the base of the control transistor 26f. The relay coils 17 to 24 are applied via setting switches 5S-0, respectively.
-8S-8 opens and closes the setting switch 5S-
2 and 5S-7 are normally closed types, and the other setting switches are normally open types. In the above configuration, when each contact plate A to H is selectively touched with a finger, the open/closed state of each switch becomes as shown in FIG. This point will be explained below. First, when the power is turned on, the initial state setting circuit 13 sets the counter circuit 14 to 2° 21.
The order of the 22 terms is (0, 0, O) and the 10 of the decoder 5
The hex code output is

It is [0]. Therefore the output

Since only [0] is at the Mr. I level, only the control transistor 26a becomes conductive, and the corresponding setting switch 5S-O is closed, and the normally closed setting switch 5S-2 is closed.
and 5S-7 are closed, and the other setting switches are open. The opening and closing of each setting switch in this initial state is the same as when touching a contact plate A, which will be described later, ie, "off". Next, when the contact plate B is touched, the switch transistor 7b becomes conductive and its collector potential decreases, so that a detection signal appears. This detection signal becomes data and input to the selector 12 and enters the OR circuit 11, and the timing pulse from the OR circuit 11 becomes the ST large input of the selector 12.
The selection setting code of 2 becomes [1, O, O). Further, the AND circuit 16 is opened by the timing pulse,
Clock pulse 15 enters AND gate 17. At this time, the counter circuit 14 has a counting code in the initial state, that is, [
0, 0, 0), the Y output of comparator circuit 4 causes A
The ND gate 17 opens and one clock pulse is applied to the counter circuit 14, so that the counting code becomes (1, O, O). Since this counting code matches the setting code of the selector 12, the Y output of the comparator circuit 4 disappears, and the counter circuit 14
stores [1°0.0]. As a result, the binary code input to the decoder 5 is [1, 0, 0]
The decimal code output becomes [1], and only the [1] output of the coder 5 becomes a low level. Therefore, the control transistor 26b becomes conductive and the normally closed setting switch 5S-2 is opened. Also

[0] Since the output is at a high level, the AND circuit 27 is conductive while the timing pulse is present, and the setting switch 5 is turned on.
S-8 closes momentarily and then opens when the timing pulse disappears. moreover

[0] Since the output is at a high level, set the setting switch 5.
This differs from the initial state in that SO is open. Next, when touching the contact plate C from the initial state, the setting code of the selector 12 becomes [0, 1° 0] as described above, and the initial counting code of the counter circuit 14 is (0, 0, 0). One tallock pulse is applied with the Y output from the comparator circuit 4, and the counting code becomes [l, 0. 0), and in this state, the setting code and counting code do not match, so the Y output from the comparator circuit 4 remains output, and one more clock pulse is applied to the counter circuit 14, and the counting code becomes [0°1].
．． 0]. Since this counting code matches the setting code, the Y output is stopped and the counter circuit 14 stores (0, 1, 0). As a result, the decimal code output of the decoder 5 becomes [2], and only the output [2] becomes low level. i.e. output

The setting switch 5S-O is different from the initial state in that the setting switch 5S-8 is closed just after the setting switch 5S-8 is closed due to the high level of [0] and the setting switch 5S-O is opened. Next, when the contact plates DH are selectively touched in the same manner, the counting codes of the counter circuit 14 are changed to [1, 1, 0], [
0,0,1], [1,0,1]. [0, 1, 1], [1, 1, 1], and the decimal code output of the coder 5 is [3] and [4] in the order of numbers. It becomes [5], [6], [7]. Therefore, only the corresponding output of the decoder 5 becomes low level, output [3]. (4) Or when [END] becomes a low level, the corresponding setting switches 5S-3, 5S-1 and 5S-6 or 5S-
4 is closed, and when the output [6] becomes a low level, the setting switches 5S-4 and 5S-5 are closed, and when the output [7] becomes a low level, the setting switches 5S-4 and 5S-5 are closed. Also, the normally closed setting switch 5S-7 is opened. For setting switches 5S-8 and 5S-0, contact plate B
Or it is the same as when touching C. Next, when you touch a contact plate other than OFF, for example, B, and then once you release your finger, you touch another contact plate, for example, C. Due to the first touch, the setting code of the selector 12 and the counting code of the counter circuit 14 are set to (1, 0, Since the setting code of the selector 12 changes to (0, 1, 0) by the second contact, the counting code of the counter circuit 14 changes accordingly to [0° 1.0] and is stored. Therefore, the result is the same as if you touched contact plate C from the beginning.Similarly, for example, if you touch contact plate A after touching contact plate B, the setting code of selector 12 becomes [0, 0, 0), The counting code also becomes (0,0°0), the control transistor 26a becomes conductive, and the control transistor 27 becomes conductive, returning to the initial state.Also, consider the case where contact plates B and C are touched at the same time. Microscopically, either one is faster, so it is assumed that the contact to B is slightly faster.When contact plate B is touched, the setting code of the data selector 12 changes to [1, 0, 0), and when the counting code of the counter circuit 14 also becomes [1, 0, 0), the Y output of the comparator circuit 4 disappears and the AND gate 17 is closed. No new operations will be performed. When contact plates B and C are in contact with each other, when only contact plate B is released and only contact plate C is in contact, the setting code of data selector 12 becomes (0, 1, 0). Then, the count code of the counter circuit 14 does not match, so a Y output is output from the comparator circuit 4, opens the AND gate 17, and changes the count code of the counter circuit 14 to (0, 1, 0).
Change to Therefore, if you touch multiple contact plates almost simultaneously, they will be set to the state touched first, but ultimately,
Since the operation corresponds to the contact plate that is touched until the end, no malfunction occurs. Next, FIG. 3 shows a washing machine circuit showing a specific application example of the setting switches 5s-o and 5s-8.
2 is a pair of relay switches CR-1a and CR-1b, respectively.
and the relay that controls CR-2a and CR-2b, AM is the fast-forward motor, PL is the pilot lamp, BZ is the buzzer, TM is the timer motor, Vl is the drainage pulp control solenoid, WM is the washing motor, SM is the dewatering motor, V2 is the detergent valve control solenoid, and V3 is the water supply control solenoid. Also PTS-IT-PTS-8T and PTS-28-P
TS-9B is a cam switch controlled by a group of cams driven by the timer motor TM, and is controlled to open and close according to the program diagram shown in FIG. Further, CD5-ll-CD5-IV is controlled to open and close by a carrier disk switch which rotates continuously for one period within one intermittent drive time of the cam group according to the program diagram in FIG. Further, 30.31 is a liquid level control switch. If you now touch the contact plate C of the standard course, the open/close states of each setting switch 5S-O to 5S-8 will be as shown in Fig. 2, and the normally closed setting switches 5S-2 and 5S-7 will be closed. Setting switch 5S-S is temporarily closed. This setting switch 5S-8 is a starting switch for relay CR-2. Therefore, in Fig. 3, 1, the setting switch 5S-8 is instantaneously closed, and since the starting cam switch PTS-3T is closed as shown in Fig. 4, the relay CR-2 is energized. -Relay CR to close 2a
-2 is self-held, and when relay switch CR-2b is closed, fast forward motor AM and relay CR
-1 is activated. By energizing this relay CR-1, relay switch CR-
1a is closed, water supply control solenoid V3 is energized via this relay switch CR-1a, relay switch CR-2a, and cam switch PTS-3T, and water supply starts. Also, since the normally closed relay switch CR-1b is opened,
Motors TM, WM, SM and drainage control solenoid V2 are not powered. However, since the timer motor TM is driven to rotate at high speed by the fast-forward motor AM, it opens and closes a group of cam switches. At time tl (see Figure 4), the cam switch P
Since TS-3T is opened, relay CR-2 is no longer excited, and when relay switch CR-2a is opened, fast-forward motor AM and relay CR-1 are about to become inactive, but the setting switch 5S-2 mentioned above is closed, and at time t1, cam switches PTS-2B and PT
Since S-IT is closed, fast-forward motor AM and relay CR-1 continue their operation. . Then, at time t2, cam switch PTS-2B opens, so fast-forward motor AM and relay CR-1 become inactive, relay switch CR-1a opens, and normally closed relay switch CR-1b closes. to be accomplished. At this time, cam switch PTS-8T, PTS
Since -8B is also open, the water supply control valve V3 becomes inoperable. However, since the cam switch PTS-6B is closed at time t2, the detergent control solenoid V2 is operated by the cam switch PTS-6B, the liquid level control switch 30, the cam switch PTS-5T, or the top lid interlocking switch 32 and the normally closed relay switch CR-1b. Since power is supplied through the cam switch PTS-IT and the cam switch PTS-IT, water is supplied through the detergent chamber and detergent is added at the same time. When a predetermined water level is reached over time, the liquid level control switch 30 switches to the normally open contact NO side, and since the cam switch PTS-7B is closed after time t2, the washing motor WM is operated by this cam switch PTS-7B, Surface control switch 30
Power is supplied via the cam switch PTS-5T. At this time, carrier desk switch CD5-IVT and CD5
-IVB is selectively closed according to the program diagram in FIG. 5, and the washing motor WM is automatically reversed. This washing state continues, and at time t3, the cam switch P
When TS-7B is opened, washing motor WM is stopped and cam switch PTS-9B is opened. Closing of PTS-7T activates the drain control solenoid V1 to drain water. When the drainage is finished and time t4 is reached, the cam switch PT
When S-8T is closed, the water supply control solenoid V3 is energized again via the liquid level control switch 31 to supply water, and when the water level reaches a predetermined level, the liquid level control switch 30 is switched and the cam switch PTS-7B is closed. washing motor WM
is driven in an overflow state to perform a rinsing process. At time t5, the rinsing process ends, and the draining process begins in the same manner as from time t3 to t4 described above. When this draining process is completed and time t6 arrives, the cam switch PTS-6T is closed, the aforementioned setting switch 5S-7 is closed, and the dewatering motor S is activated via the liquid level control switch 30.
M is supplied with electricity and performs dehydration. When the dehydration process is completed and time t7 arrives, the second rinsing, draining, and dewatering processes are performed in the same manner as from time t4 to t7, and each process of the standard course ends at time t8. Therefore, in the case of this standard course, setting switch 5S-2
is closed, the fast-forward motor AM operates from the time of startup until time t2, skipping the pre-washing and draining steps during that time. However, when touching other contact plates, such as F, the setting switch is additionally activated. 5S-4 is closed,
As is clear from the program diagram of the cam switch PTS-4T, the fast-forward motor AM operates until time t4, and thereafter each process from rinsing to spin-drying is performed. In this way, the aforementioned setting switches 5S-1 to 5S-5 are used to change the operating time of the fast-forward motor AM. If you touch the off contact plate A during the standard course operation period, the selector 12 and counter circuit 14 will be activated as described above.
returns to (0, O, O), the setting switch 5S-O is closed, the fast forward motor AM is operated, the subsequent strokes of the standard course are skipped, and the operation is completed. As described above, according to the present invention, a detection signal generated when a finger touches a contact plate is sorted into a binary setting code by an encoder, and a gate is opened by a timing pulse from the encoder, and a tarok pulse is applied through this gate. A binary counter is provided, and a comparison circuit is provided which compares the counting code of the counter with the setting code to make the counting code match the setting code, and the stored output of the counter is converted into a decimal code by a decoder, and the output of the decoder is Since the multiple setting codes provided in the washing machine circuit have been switched, by touching a predetermined contact plate with a finger, the desired washing course can be stored in the binary counter and the washing machine circuit can be switched and driven in a predetermined order. can. Also, if the detection signal is applied as a decimal code to the setting switch, if multiple contact plates are touched at the same time, mixed signals will be applied to the setting switch, resulting in malfunction. Even if both are touched at the same time, the binary code corresponding to the last touched contact plate is eventually memorized and operation is performed accordingly, so there is no malfunction. Furthermore, by using a contact plate in the selection device for a desired washing course, the selection device has no moving parts and can be made watertight, and failures of the selection device can be reduced and reliability can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an electric circuit diagram of the control device, Fig. 2 is an explanatory diagram of the open and closed states of the setting switch,
FIG. 3 is a washing machine circuit diagram, FIG. 4 is a cam switch program diagram, and FIG. 5 is a carrier desk switch program diagram. A-H...Contact plate, 1...Detection circuit,
2... Encoder, 3... Binary counter, 4... Comparison circuit, 5... Decoder, 5s-o, 5s-s...・Setting switch, 6・
... Drive circuit, AM ... Rapid feed motor,
5S-8...Start switch, 27...
AND circuit, PTS-I T-PTS-9B...
・Timer cam switch.

Claims (1)

[Claims] 1 An instantaneous input device such as a contact plate that selects multiple washing courses, a detection circuit that detects the instantaneous signal from the device, an encoder that converts this detection signal into a binary code, and a clock pulse that is counted and converted into a binary code. a binary counter circuit that stores a counting code, a comparison circuit that compares the setting code of the encoder and the counting code of the binary counter circuit and changes the counting code until the two match; 1. A control device for a fully automatic washing machine, comprising a decoder that converts a counting code into another code, and is configured to perform washing courses according to the output of the decoder.