JPH0817867B2 - Washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention is directed to water discharged from a washing tank by drainage operation or overflow rinse operation and dehydration on the dehydration tank side. The present invention relates to a washing machine in which water discharged from the dehydration tank by operation is discharged from a common drain pipe.

(Prior Art) In a washing machine of this type, a water supply operation,
A detergent washing operation, a drainage operation, an overflow rinsing operation, etc. are performed, and a dehydration tank side performs a single-mode dehydration operation, a rinse-mode dehydration operation, etc. still,
The single mode dehydration operation is an operation of rotating the dehydration basket in the dehydration tank, and the rinse mode dehydration operation is an operation of rotating the dehydration tank in an appropriate intermittent pattern while supplying water into the dehydration tank.

Thus, in this type of washing machine, the water discharged from the washing tub and the water discharged from the dehydration tub are discharged through a common drain pipe. In this case, on the wash tank side,
The water in the washing tank is discharged during drainage operation, and
On the dehydration tank side, water is discharged in any mode of dehydration operation.

(Problems to be solved by the invention) In the above-mentioned conventional one, drainage operation on the washing tank side,
When the dehydration operation on the dehydration tank side is performed at about the same time,
The amount of water flowing into the drainage pipe increases, and particularly, in the initial stage of the drainage operation on the washing tank side and the initial stage of the dehydration operation, the amount of drainage per unit time is considerably large. Therefore, when the dehydration operation is started at the beginning of the drainage operation (or when the drainage operation is started at the beginning of the dehydration operation), the amount of water flowing into the drainage pipe is considerably large, and The drainage capacity is reduced. As a result, in the dehydration tank, the amount of drainage is smaller than the amount of water released by the dehydration operation, and water is accumulated in the dehydration tank. In the rinsing mode, since laundry contains a detergent component, bubbles occur in the dehydration tub and the rotation resistance of the dehydration basket increases.

The present invention has been made in view of the above circumstances, and its purpose is to eliminate the dehydration operation in a situation where water accumulates in the dehydration tank, and to eliminate insufficient dehydration, and in the dehydration tank. It is to provide a washing machine capable of preventing the generation of bubbles.

[Configuration of the Invention] (Means for Solving the Problems) The present invention is directed to a case where a drainage operation or an overflow rinse operation (operation in which drainage is performed) on the washing tank side is started.
The amount of drainage water from the washing tank per unit time is large in the initial start time zone within about 1 minute from the start of the predetermined operation and then decreases, and when the dehydration operation on the dehydration tank side is started, The amount of drainage water per unit time from the water tank was large in the initial start time zone within about 1 minute from the start of the dehydration operation, and then decreased thereafter. Thus, the present invention provides a common drain pipe for the water discharged from the washing tank by the drainage operation or overflow rinse operation on the washing tank side and the water discharged from the dehydration tank by the dehydration operation on the dehydration tank side. In the one that is designed to be discharged from
When a dehydration operation start command is generated within about 1 minute after the start of the drainage operation or overflow rinse operation on the wash tank side, or within about 1 minute after the start of the dehydration operation, a drainage operation start command or overflow rinse operation on the wash tank side It is characterized in that the execution of the dehydration operation is prohibited in any case when the start command is issued.

(Operation) When the predetermined operation is performed on the side of the washing tank, in other words, when the drainage from the washing tank is performed, if the drainage operation or the overflow rinse operation does not take about 1 minute after the start, dehydration is performed. Execution of the dehydration operation is prohibited even if an operation start command is issued. Therefore, when the amount of drainage per unit time on the washing tank side is large, the dehydration operation is not executed, and a large amount of water that exceeds the drainage capacity does not flow into the drainage pipe. As a result, it is possible to eliminate the dehydration operation in a situation where water accumulates in the dehydration tank. Also, when the dehydration tank is performing the dehydration operation, in other words, when the dehydration tank is being drained, when the dehydration operation has not been completed for about 1 minute, the washing tank side is the drainage operation. If a start command or an overflow rinse operation start command is issued, execution of the dehydration operation is prohibited. Therefore, the amount of drainage water from the dehydration tank will decrease, so even if a large amount of water is discharged from the washing tank when the drainage operation or overflow rinse operation is started, a large amount of water that exceeds the drainage capacity will flow into the drain pipe. There is no. As a result, also in this case, the dehydration operation in a situation where water accumulates in the dehydration tank can be eliminated.

(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.

FIG. 3 shows a schematic configuration of a main part of the washing machine,
In the figure, 1 is a washing tank, 2 is an agitator which is rotationally driven by a washing motor 3, and 4 is an overflow pipe. A drain port 1a is formed at the bottom of the washing tank 1. On the other hand, 5 is a dewatering tank juxtaposed to the washing tank 1, 6 is a dewatering motor 7
It is a dehydration basket driven by rotation. The dehydration tank 5
A drain port 5a is formed at the bottom of the. Reference numeral 8 denotes a drain pipe, and the drain port 1a is connected to the overflow pipe 8 through an electromagnetically driven drain valve 9, and the overflow pipe 4 and the drain port 8 are provided.
5a is connected. Reference numeral 10 denotes a water supply pipe connected to a water faucet (not shown), which is branched into two branches, one branch pipe 10a of which has a discharge port facing the washing tank 1 and the other branch pipe 10b which has a discharge port. Is facing the dehydration tank 5. Reference numerals 11 and 12 are electromagnetically driven wash-side water supply valves and dehydration-side water supply valves, respectively, which are provided on the branch pipes 10a and 10b of the water supply pipe 10, respectively.

Next, FIG. 4 shows an electrical schematic configuration. In FIG. 4, 13 is a control circuit for controlling various operations on the washing tank 1 side and dehydration operation on the dehydration tank 5 side. Consists of a microcomputer. The control circuit 13 has a washing control program for the operation performed on the side of the washing tank 1 and a dehydration control program for the dehydration operation on the side of the dewatering tank 5, and the washing motor 3 and the dewatering operation are performed according to the programs. Drive circuit 1 for motor 7, drain valve 9, water supply valve 11, 12 respectively
Drive / stop control is performed via 4 to 18. Reference numeral 19 denotes a wash input circuit, which is configured to include an operation start switch, an operation stop switch, an operation setting switch, a time setting switch, and the like. Reference numeral 20 denotes a dehydration input circuit, which has an operation start switch, an operation stop switch, an operation setting switch, a time setting switch, and the like.

Here, the operations performed on the washing tank 1 side include water supply operation in which the water supply valve 11 is opened, detergent cleaning operation in which the washing motor 3 is driven, drainage operation in which the drain valve 9 is opened, and water supply valve.
There is an overflow rinse operation in which 11 is opened and the washing motor 3 is driven. In this case, the water in the washing tank 1 is discharged by the drainage operation and the overflow rinse operation.

In addition, the operation performed on the dehydration tank 5 side is a single mode dehydration operation in which the dehydration motor 7 is driven, and a rinse mode dehydration in which the dehydration motor 7 is intermittently driven and the water supply valve 12 is opened. There is driving. In this case, water is discharged from the dehydration tank 5 in both operations.

Now, FIG. 1 is a flowchart showing the control function of the dehydration operation in the rinse mode by the control circuit 13, and FIG. 2 is a flowchart showing the control function of the drainage operation by the control circuit 13. ing.

First, the drainage operation control function will be described with reference to FIG. “Drainage operation start command” in step S ₁
Is caused by the drainage operation setting input by the operation setting switch in the wash input circuit 19, and when the operation in the wash layer 1 is an automatic operation course, automatically after the detergent washing operation or the overflow rinse operation is performed. There is. And Thus, this drainage operation start command is generated (determined in step S _1), starts the water-discharge operation by opening the drain valve 9 as previously described (step S _2). And
The drainage operation flag F _{HA is set} to “1” (step S ₃ ), and the drainage time flag F _{HB is set} to “1” (step S ₄ ),
Further starts the time counting operation (step S _5). The drainage operation flag F _HA is for determining whether or not the drainage operation from the wash tank 1 is being executed. When the content is “1”, the drainage operation from the wash tank 1 is being executed. Indicates that The drainage time flag F _HB is for determining whether or not the drainage operation execution time (elapsed time from the start) is within 1 minute, and when the content is “1”, the drainage operation execution time is Indicates that (elapsed time from start) is within 1 minute.

Thus, when the drainage operation is started, the water in the washing tank 1 is discharged to the outside of the machine through the drainage pipe 8. After this,
Drainage operation stop command to determine whether the generated (step S _6). This drainage operation stop command is generated by an input from the operation stop switch in the wash input circuit 19, or when the operation in the wash tank 1 is an automatic operation course and is automatically generated by timed control or drainage end detection. There is. And Thus, when there is no occurrence of the water-discharge operation stop command, the drainage time flag F _HB is determined whether or not "1" (step S _7), if it is "1", the drainage operation Determine if the execution time is less than 1 minute (step
S ₈ ). If the execution time of the drainage operation is still within 1 minute, the process returns to step S ₆ . Then, if it exceeds 1 minute running time of drainage operation while generating no drainage operation stop command, the drainage time flag F _HB to "0" (step S _9), to stop the counting operation ( step S _10), step S ₆
Return to If a drainage operation stop command is issued during execution of the drainage operation, the drainage operation is stopped (step S ₁₁ ), and the drainage operation flag F _HA and the drainage time flag F _HB are set to “0” (step S ₁₁ ). ₁₂ and step S _13). As can be seen from this, the drainage time flag F _HB is set to "1" when the execution time after the drainage operation is started is within one minute, and is set to "0" when it is exceeded. Also, while the drainage operation is being executed, the drainage operation flag F _HA is set to "1",
When the operation is stopped, it is set to "0".

Next, the dehydration operation control function will be described with reference to FIG. The “dehydration operation start command” referred to in step P ₁ is generated by switch input by the operation start switch in the dehydration input circuit 20. And Thus, this dewatering operation start command is generated (determined in step P _1), first,
Nde reading drainage operation flag F _HA in washing tank 1 side, the drainage operation flag F _HA determines whether or not "1" (step P ₂₎ that is, have been made water discharging operation in the wash tank 1 side Judge whether or not. When the drainage operation is not performed on the wash tank 1 side (when the drainage operation flag F _HA = 0), the dehydration operation is started (step P ₄ ), and the drainage operation is performed on the wash tank 1 side. the (step P ₂ "YES"), Nde read the drainage time flag F _HB, the determination whether the drainage time flag F _HB is "1" (step
P ₃ ). That is, it is determined whether or not the drainage execution time on the side of the washing tank 1 is within 1 minute. If the drainage operation execution time exceeds 1 minute, start the dehydration operation (step P ₄ ),
Dewatering operation when the water-discharge operation execution time is within 1 minute in a standby mode without starting (without going to step P _4), to start the dewatering operation when exceeding the 1 minute.

When the dehydration operation is started, the timing operation is started for the execution time of this dehydration operation (step P ₅ ), and it is judged whether the drainage operation flag F _HA is “1”. (step P _6). Drainage operation flag F _HA is "1"
If not, that is, if the drainage operation is not started on the side of the washing tank 1, it is determined whether or not the execution time of this dehydration operation has exceeded the set time (step P ₇ ). Leave situation drainage operation in the wash tank 1 side during run is not started in this dewatering operation, the dehydration operation has passed the set time, stops the dewatering operation (Step P _8), and stop the aforementioned timing operation Then (step P ₉ ), the dehydration operation is completed.

If the drainage operation is started on the washing tank 1 side during the execution of this dehydration operation (in step P ₆ , the drainage operation flag F _HA
= 1), it is determined whether or not the dehydration operation execution time at this point is within 1 minute (step
P ₁₀₎ and, if the elapsed unless within one minute (1 minute), and ends running in the set time of the dehydration operation as usual. Here, when the drainage operation is started during the execution of the dehydration operation while the execution time is within 1 minute, the dehydration operation is stopped (step P ₁₁ ), and
Pause time counting operation (Step P _12). However, the time value up to this point is retained without being cleared. Then, when the execution time of the drainage operation exceeds 1 minute (determined in step P ₁₃ ), the dehydration operation is restarted (step P ₁₄ ), and
Restarts the timekeeping operation from the above time value (step
P ₁₅ ). Thereafter, if the execution time set time course of the dewatering operation (determination in step P _16), stops the dehydration operation (step P _17), to stop the counting operation (Step P _18), this End the dehydration operation.

As can be seen from the above description, when the dewatering operation start command is issued, the dewatering operation is started immediately when the drainage operation is not being performed on the washing tank 1 side, but when the draining operation is being performed. When the execution time of the drainage operation is less than 1 minute, the execution of the dehydration operation is prohibited, and the dehydration operation is started after waiting 1 minute.
Further, during the execution of the dehydration operation, if the drainage operation is started on the washing tank side when the execution time of the dehydration operation is within 1 minute, the execution of the dehydration operation is prohibited and the washing tank 1 side is The execution of the dehydration operation is awaited until the drainage operation of 1 minute has passed, and then restarted. Therefore, for example, as shown in FIG. 5, when the drainage operation is performed on the side of the washing tank 1 and the drainage operation is performed within 1 minute (time T ₁ ), dehydration is performed. When a start command for operation is issued, execution of the dehydration operation is prohibited even if the start command is issued. As a result, in the initial stage of the drainage operation in which the drainage from the washing tank 1 is large, the dehydration operation is not started (the drainage on the side of the dehydration tank 5 is not performed), so the drainage pipe 8 has a large amount of water exceeding its drainage capacity. Water does not flow into the dehydration tank 5, so that the water does not accumulate in the dehydration tank 5 and the dehydration operation in such a state is not executed. It should be noted that when the execution time of the drainage operation has passed 1 minute, that is, when the water is not accumulated in the dehydration tank 5, the execution of the dehydration operation is started, and thus bubbles are generated during the dehydration operation. There is no such thing. Also, as shown in FIG. 6, a dehydration operation start command is issued when drainage operation is stopped (time T ₂ ).
When this is done, the execution of the dehydration operation is started, but when the drainage operation is executed when the execution time of this dehydration operation is within 1 minute (time point T ₃ ), the execution of this dehydration operation is prohibited. As a result, the amount of drainage water from the dehydration tank 5 is reduced. Therefore, also in this case, it is possible to avoid the dehydration operation in a situation where water accumulates in the dehydration tank 5 as in the above case. Then, the dehydration operation is restarted when the drainage operation has passed one minute (time point T ₄ ), that is, when the amount of drainage water from the washing tank 1 decreases. Furthermore, as shown in FIG. 7, when the execution of the drainage operation is started after the execution time of the dehydration operation has passed 1 minute (time point
The T _5), dehydrating operation is initiated by the start command generating time. Also in this case, the dehydration operation is not executed in a situation where water is accumulated in the dehydration tank 5.

Further, as described above, since the execution of the dehydration operation is prohibited under the time condition of "within 1 minute", the following effects can be obtained. That is, if the dehydration operation start command is generated while the drainage operation is being performed, or if the drainage operation start command is generated during the execution of the dehydration operation, if the dehydration operation is uniquely prohibited, Even if the dehydration operation is performed in parallel with the drainage operation, the drainage pipe 8
If the total inflow of water into the water is less than its drainage capacity (that is, drainage operation or dehydration operation is over 1 minute,
In the case where there is no problem in executing the dehydration operation), the problem that the dehydration operation is not performed occurs, but in the present embodiment, the execution of the dehydration operation is prohibited because the above-mentioned time condition is set. The effect is that it can be controlled appropriately according to the drainage situation.

In addition, in the above-mentioned embodiment, the time of the start of the dehydration operation and the start of the drainage operation is defined as "1 minute", but depending on the model of the washing machine, or even for the same model, the drainage capacity or the dehydration capacity Since "1 minute" is set within the range of about ± 10%, it may be "about 1 minute". Further, in the above embodiment, the dehydration operation in the rinse mode is the control target, but this may be the dehydration operation in the single mode. Further, although the dehydration operation is controlled so as to correspond only to the drainage operation in the washing tub 1, overflow rinsing operation is also included as the operation accompanied by the drainage operation from the washing tub 1, so this overflow rinsing operation is supported. It is also possible to control the dehydration operation.

Besides, the present invention is not limited to the above-described embodiments, and can be variously modified and implemented without departing from the scope of the invention.

[Effects of the Invention] As is apparent from the above description, the present invention provides water discharged from the washing tank by drainage operation or overflow rinse operation on the washing tank side and dehydration operation on the dehydration tank side by the dewatering operation. When the water discharged from the water tank is discharged from a common drain pipe, when a dehydration operation start command is issued within about 1 minute after the start of the drain operation or overflow rinse operation on the washing tank side, or the dehydration operation After the start of 1
It is characterized in that the execution of the dehydration operation is prohibited in any case when the drainage operation start command or the overflow rinse operation start command on the washing tank side occurs within minutes. It is possible to eliminate the dehydration operation in a situation where water accumulates in the dehydration tank, so that it is possible to eliminate insufficient dehydration and also to prevent the generation of bubbles in the dehydration tank. It has an excellent effect that proper dehydration can be executed / prohibited properly according to the drainage condition.

[Brief description of drawings]

Drawing shows one example of the present invention, Drawing 1 is a flow chart which shows the contents of dehydration operation control, Drawing 2 is a flow chart which shows the contents of drainage operation control, Drawing 3 is a schematic block diagram of a washing machine, and Drawing 4 Is a block diagram of an electrical configuration, FIGS.
The figure is a time chart showing an example of drainage operation and dehydration operation status. In the figure, 1 is a washing tank, 3 is a washing motor, 5 is a dewatering tank, 6 is a dewatering basket, 7 is a dewatering motor, 8 is a drain pipe, 9 is a drain valve,
13 is a control circuit.

Claims (1)

[Claims] 1. Water discharged from the washing tank by drainage operation or overflow rinse operation on the washing tank side and water discharged from the dehydration tank by dehydration operation on the dehydration tank side are discharged from a common drain pipe. In such a case, when the dehydration operation start command is generated within about 1 minute after the start of the drainage operation or the overflow rinse operation on the wash tank side, or the drainage operation on the wash tank side within about 1 minute after the start of the dehydration operation. A washing machine characterized in that execution of a dehydration operation is prohibited in any case when a start command or an overflow rinse operation start command is issued.