JPS622836B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine that selectively executes a plurality of washing courses.

For example, fully automatic washing machines have conventionally been provided with a plurality of program selection switches for selecting any program from among a plurality of programs for executing a plurality of washing courses, such as a standard course or a saving course. A plurality of washing water flow changeover switches are provided for switching the strength of the washing water flow in a plurality of stages during the washing process. Therefore, such fully automatic washing machines have the disadvantage of requiring a large number of switches, which causes a decrease in reliability.
Furthermore, since there are such a large number of switches, there is a great possibility of erroneous operation, and the operation is relatively difficult, especially for housewives.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a plurality of program selection switches for selecting arbitrary programs for executing a plurality of washing courses to control the washing water flow during the washing process. Can be used for strength selection, etc.
Therefore, it is an object of the present invention to provide a washing machine that can reduce the total number of switches required, improve its reliability, and facilitate its operation.

An embodiment of the present invention will be described below based on the drawings. First, in Fig. 1, which shows the schematic configuration of a fully automatic washing machine with dehydration and dehydration, 1 is an outer box, 2 is a water receiving tank supported by an elastic suspension mechanism 3, 4 is a rotating tank, and 5 is a pulsator. , 6 is a motor, 7 is a water supply valve, 8 is a drain valve, 9 is a lid, and 10 is an operation box.

Figure 2 shows the motor 6, water supply valve 7 and drain valve 8.
FIG. 2 is a block diagram showing a control system of a washing machine drive section 11 consisting of the following components. That is, 12 is a control device composed of a large-scale integrated circuit (LSI), and this control device is configured to perform a plurality of pre-stored washing courses (in this embodiment, "standard").
The washing machine drive section 11 is controlled in a predetermined manner via the amplifier circuit 13 based on a program selected by the operator from among the programs for execution (the "saving" course and the "saving" course). 14 is a control device 12
A state detection unit for providing information signals necessary for executing control operations to the water tank, specifically, a lid switch that detects the open/closed state of the lid 9, and a water level state in the water receiving tank 2. It has a water level switch, an abnormal vibration detection switch for detecting an abnormal vibration state of the water receiving tank 2, etc., and provides the operating state detected by each switch to the control device 12 as an information signal. 15 is a selection signal generator for generating selection signals S1 and S2 for selecting an arbitrary one of the washing courses and outputting the same to the control device 12; 16 is a selection signal generator for generating selection signals S1 and S2 for selecting an arbitrary one of the washing courses; This is a water flow selection section that outputs water flow signals Sa, Sb, and Sc to the control device 12 for changing the strength of the washing water flow during the washing process accordingly. Reference numeral 17 is a process display section controlled by the control device 12, which is used to display the washing process currently being performed, such as "washing" and "spin-drying".

Now, the selection signal generation section 15 and the water flow selection section 16 are specifically constructed as shown in FIG. 3, and FIG. 3 will be explained below. That is, the selection signal generator 15 includes two automatic return type program selection switches 18 and 19 disposed on the front panel 10a of the operation box 10. ,1
9 are connected between the positive power supply terminal +Vcc and the ground terminal via resistors 20, respectively. Therefore, when the program selection switch 18 is closed, a rising pulse-shaped selection signal S1 is output from the corresponding output terminal P1, and when the other program selection switch 19 is closed, the corresponding output terminal P1 is outputted. A falling pulse-shaped selection signal S2 is output from the output terminal P2. Incidentally, the program selection switch 18 corresponds to the "standard" course, and the program selection switch 19 corresponds to each washing course, the "economy" course. Further, although not shown, the washing machine is configured to be powered on in conjunction with closing of each program selection switch 18, 19. On the other hand, the water flow selection section 16 is for selecting the washing water flow during the washing process from, for example, three levels of "strong" water flow, "medium" water flow, and "weak" water flow, which will be described below. That is, 21 is
This is an R-S flip-flop consisting of NAND circuits 22 and 23, whose set input terminal and reset input terminal are respectively connected to the output terminals P1 and P2 of the selection signal generation section 15, and whose output terminals Q and It is connected to lines L1 and L2 via inverters 24 and 25, respectively. Therefore, when the program selection switch 18 is closed and the selection signal S1 is output from the output terminal P1, a logic value "0" signal is output to the line L1, and a logic value "1" signal is output to the line L2. , when the program selection switch 19 is closed and the selection signal S2 is output from the output terminal P2, a logic value "1" signal is output to the line L1 and a logic value "0" signal is output to the line L2. . 26 are three D flip-flops 2 each with a clear terminal CL and a preset terminal PR.
7, 28, 29 as a storage means, each D flip-flop 27, 28,
At 29, each clock input terminal CK is connected to receive the selection signal S1 from the output terminal P1 via an inverter 30, and the respective set input terminal D, output terminal Q, clear terminal CL and preset terminal The terminals PR are connected to each other or to the line L1 and the ground terminal as shown. Therefore, in such a ring counter 26, the program selection switch 1
8 is closed, the D flip-flop 27,
A selection signal S1 inverted by an inverter 30 is applied to each clock input terminal CK of 28 and 29, so that the count contents gradually advance, and a "1" signal is output to line L1. Sometimes, the D flip-flops 27, 28,
Each output from 29 has a logical value "1", "0",
When it is set to "0", the count content of the ring counter 26 is set to "100". 31
is a ring counter which is a storage means and is composed of three D flip-flops 32, 33, 34 similar to the ring counter 26. In each D flip-flop 32, 33, 34, each clock input terminal CK connects to an inverter 35. The set input terminal D, the output terminal Q, the clear terminal CL, and the preset terminal PR are connected to each other or to the line L2 and ground. Connected to the terminal as shown. Therefore, in the ring counter 31 as well, the count contents gradually advance each time the program selection switch 19 is closed, and when a "1" signal is output to the line L2, each clock input terminal CK The count content is set to ``100'' regardless of the input to . Note that when the selection signal S1 or S2 is newly input to each of the ring counters 26 and 31, the rise of the input signal to the respective clock input terminal CK and the fall of the line L1 or L2 occur simultaneously. Therefore, the count contents are always kept in the initial state, that is, set to "100". 36 is AND circuit 37 to 4
2 and NOR circuits 43 to 45, one input terminal of which is connected to the line L2, and the other input terminal of each of three AND circuits 37, 38, 39 connected to the D flip-flop 2, respectively.
The other input terminals of the three AND circuits 40, 41, 42 are connected to the respective output terminals Q of the D flip-flops 32, 28, and 29, and similarly, one input terminal is connected to the line L1, respectively. ,3
AND circuits 37, 40, 38, 4 which are connected to each output terminal Q of 3 and 34 and form a pair.
Each of the output terminals 1, 39, and 42 is connected to a NOR circuit 4.
It is connected to input terminals 3, 44, and 45. Further, 46 indicates three light emitting diodes 47, 48, 4 disposed on the front panel 10a of the operation box 10.
9, each light emitting diode 47, 48, 49 is connected to a NOR circuit 4.
The output terminals 3, 44, and 45 are connected to the positive power supply terminal +Vcc via resistors 50, respectively.
The water flow display device 46 is for displaying the washing water flow selected by the water flow selection section 16, and the light-emitting diode 47 indicates that the "strong" water flow has been selected by lighting the light emitting diode 47. Similarly, the light emitting diodes 48 and 49 indicate that the "medium" water flow and the "weak" water flow have been selected, respectively, by lighting them up. P3 and P4 are output terminals of the water flow selection section 12, and are connected to NOR circuits 44 and 45, respectively, to provide water flow signals that will be understood from below.
Output Sa, Sb, Sc. That is, the water flow signal Sa is for selecting the "strong" water flow, and the output terminal P
This corresponds to the case where the outputs from 3 and P4 both have a logical value of "1". Further, the water flow signal Sb corresponds to a "medium" water flow, and corresponds to the case where the outputs from the output terminals P3 and P4 become logical values "0" and "1", respectively. Furthermore, the water flow signal Sc is for selecting a "weak" water flow, and corresponds to the case where the outputs from the output terminals P3 and P4 become logical values "1" and "0", respectively.

In the above configuration, when the program selection switch 18 is closed only once, the selection signal S1 is output from the output terminal P1, thereby selecting the "standard" course execution program in the control device 12. . At the same time, the count of the ring counter 26 is set to "100", and a logic "0" signal is output to line L1, and a logic "1" signal is output to line L2. Therefore, the logic value "1" is obtained only from the AND circuit 37.
The signal is output, and the output of the NOR circuit 43 is set to the logic value "0", and the output of the other NOR circuit 4 is
The outputs of 4 and 45 are set to logical value "1". Therefore, the outputs from output terminals P3 and P4 both have a logical value of "1", which is a water flow signal corresponding to a "strong" water flow.
At the same time that Sa is output, the light emitting diode 47 lights up to indicate that the "strong" water flow has been selected. From this state, when the closing operation of the program selection switch 18 is repeated, the selection signal S1 is output each time, and the count content of the ring counter 26 gradually increases from "010" to "001". If the content is "010", the outputs from the output terminals P3 and P4 have logical values "0" and "1", respectively, and the water flow signal Sb corresponding to "medium" water flow is output and light is emitted. diode 48
lights up to indicate that "Medium" water flow has been selected. In addition, when the count content of the ring counter 26 is "001", the output terminals P3, P
The outputs from 4 have logical values of "1" and "0" respectively, and a water flow signal Sc corresponding to the "weak" water flow is output, and the light emitting diode 50 lights up to indicate that the "weak" water flow has been selected. is displayed. If the closing operation of the program selection switch 18 is repeated after the output of the water flow signals Sa, Sb, and Sc has completed one cycle in this way,
The count content of the ring counter 26 is returned to the initial state, that is, "100", and the above-described operation is thereafter performed repeatedly. On the other hand, when the program selection switch 19 is closed, the selection signal S2 is output from the output terminal P2, and the control device 1
At the same time that the "saving" course execution program in No. 2 is selected, water flow signals Sa, Sb, and Sc are output in the same manner as when the program selection switch 18 is closed.

According to the present embodiment described above, by repeating the operation of the program selection switches 18 and 19, the strength of the washing water flow can be changed to multiple levels. It is not necessary to provide a washing water flow changeover switch, and it is possible to suppress a decrease in reliability due to poor contact of the switch, and also to suppress an increase in erroneous operations due to an increase in the number of switches. Furthermore, the strength of the washing water flow selected by operating the program selection switch 18 or 19 is displayed on the water flow display device 46, which is convenient in actual use. By the way, if an attempt is made to control the water flow display device 46 by the control device 12 made up of an LSI, the number of input/output terminals of the LSI will increase, causing a problem that the cost will rise. Since the water flow display device 46 is configured to be controlled by an external circuit, the LSI only needs to have a small number of input/output terminals, and there is no risk of an increase in cost.

According to the present invention, as understood from the above description, a plurality of program selection switches for selecting arbitrary programs from among a plurality of washing course execution programs are used for selecting the strength or weakness of the washing water flow during the washing process. As a result, the total number of switches required can be reduced, and reliability and ease of operation can be promoted. A washing machine can be provided.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a schematic longitudinal sectional side view of the entire system, FIG. 2 is a block diagram of the control system, and FIG. 3 is an electrical circuit diagram of the main parts. In the figure, 12 is a control device, 15 is a selection signal generation section, 16 is a water flow selection section, 18 and 19 are program selection switches, and 26 and 31 are ring counters (storage means).

Claims (1)

[Scope of Claims] 1. A plurality of program selection switches for outputting a selection signal for selecting any one of a plurality of washing course execution programs, and a washing course corresponding thereto based on the selected program. and a controller for continuously outputting the selection signal stored in the storage means, further comprising a storage means for storing the number of consecutive outputs of the selection signal by the program selection switch; A washing machine characterized in that the washing machine is configured to selectively change the strength of the washing water flow during each washing course based on the number of washing cycles. 2. The storage means is configured to return to the initial state when a selection signal from the program selection switch is newly output after a cycle of selective changes in the washing water flow by the program selection switch has been completed. A washing machine according to claim 1. 3. The control device is configured to return the storage means to the initial state when a predetermined washing course is selected by a predetermined program selection switch and another washing course is selected by another program selection switch. A washing machine according to claim 1, characterized in that: