JPH035200B2 - - Google Patents

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a two-tub washing machine.

(b) Prior Art As a conventional example, there is a washing machine shown in Japanese Utility Model Publication No. 57-29758.

This is a centrifugal dehydration tank that has a bottomed cylindrical shape or a bottomed cylindrical shape whose diameter is slightly larger at the bottom than the upper opening. The upper opening is covered with a dehydration cap having a cylindrical part in the center, and a rinsing water inlet is arranged above the cylindrical part of the dehydration cap, and spin rinse is performed by repeating the cycle of dehydration operation, dehydration stop, and water supply. This is a spin-rinse washing machine that is characterized by the following:

However, this is because the water supply time in the spin-rinse process is set in advance according to the lowest water pressure that can be expected. For example, if water is supplied into the washing tub during spin-rinsing, it will inevitably cause The amount of water flowing into the tank decreases, resulting in insufficient rinsing. Well, since it is set to the minimum water pressure, if the water pressure is higher than that, it will be a waste of water.

(C) Problems to be Solved by the Invention The present invention satisfactorily copes with the drop in water supply pressure to the dehydration tank when water is supplied to both tubs at the same time in a two-tub washing machine having a dehydration and rinsing process. , the purpose is to prevent the occurrence of insufficient rinsing.

(d) Means for Solving the Problems The present invention controls the opening and closing of the washing/rinsing process, the dehydrating/rinsing process, and each solenoid valve connected to both tubs in a two-tub washing machine having a dewatering and rinsing process. A control device is provided, and this control device extends the time required for water supply during the dewatering and rinsing process when water is supplied to both the tanks at the same time.

(e) Effect That is, when water is supplied to both tanks, the water supply pressure to the dehydration tank inevitably decreases, so the water supply time is extended by that amount.

(f) Examples Embodiments of the present invention will be described based on the drawings.

In FIG. 3, 1 is a two-tub washing machine in which a washing tub 3 and a dewatering tank 4 are arranged side by side in a machine frame 2, and a control box 5 is arranged at the upper rear part. A large-diameter chevron-shaped rotary blade (not shown) is disposed at the inner bottom of the washing tub 3, and rotates at a low speed during washing. A dehydration tank 6 with an upper opening edge 6a curled inward is disposed within the dehydration receiving tank 4. This dehydration tank 6 has dehydration holes 7 bored on its circumferential side, and is connected to a motor rotating shaft 8 to perform "dehydration" and dehydration by continuous clockwise rotation.
It performs "dehydration rinsing" by repeating the cycle of braking and stopping (water supply during braking and stopping). Further, the motor 9 is elastically attached to the inner bottom of the machine frame 2 by anti-vibration springs 10, and the motor rotating shaft 8 is elastically supported by anti-vibration rubber 11.

Reference numeral 12 denotes a top plate fixed to the upper opening of the dehydration receiving tank 4, and has a clothing input port 13 which has approximately the same diameter as the upper opening of the dehydration tank 6 and faces from above.

14 is a plate-shaped safety cover that is pivotally supported within the control box 5 and opens and closes the clothing input port 13;
A large number of small holes 15 are bored in the bottom surface, and the clothes input port 13 is deeply recessed to approach the upper opening of the dehydration tank 6. Although not shown, the upper part of the safety cover 14 is covered with a dehydration upper cover.

Inside the control box 5, there is a dual switching electromagnetic water supply valve 17 for the water supply hose installation port 16.
A washing water supply channel 18 and a rinsing water supply channel 19 are provided, which communicate with each other via a water supply channel 18. The water supply channel 18 supplies water into the washing tub 3, and the water supply channel 19 faces the side wall of the safety cover 14 and is inserted into the cover. Supply water.

The washing machine 1 washes in the washing tub 3, rinses if necessary, and performs rinsing and dewatering in the dewatering tank 4. In particular, when we explain the operation inside the dehydration tank 4, we first start with normal “dehydration”.
The dehydration tank 6 is activated by setting the timer.
Rotate clockwise at approximately 1400 rpm to perform centrifugal dehydration.

In addition, during "dehydration rinsing", the rinse water supplied from the water supply channel 19 to the recessed safety cover 1.
4, and from there it falls accurately into the dehydration tank 6 through small holes 15, etc. Dehydration tank 6
The rinsing water inside the tub is directly absorbed by the laundry at the top of the tub, and then sequentially enters the middle section where it is absorbed.

When centrifugal force is applied, the water absorbed into the laundry is discharged through the dehydration holes 7, and by repeating water absorption and dewatering several times in this way, the detergent liquid contained in the laundry is removed. It is diluted and so-called rinsed.

Next, FIG. 4 is a front view of the control box 5, in which 20 is a finishing agent inlet, 21 is an overflow water level adjustment lever, and 22 is a drain valve operation button.

23 is a water flow changeover switch for changing the water flow intensity; 24 is a switch for switching the rinsing, which is normally performed on the side of the washing tub 3, to water injection rinsing, in which rinsing is performed while water is being poured; 25 is a switch for temporarily stopping the rotary blade and water supply; 26 is a washing/rinsing time setting and start switch on the washing tub 3 side, 27 is a start switch for an automatic course of dehydration rinsing → spin drying on the dehydration tank 6 side, and 28 is a dehydration time setting and start switch. In addition, each switch is equipped with display light emitting diodes 24a and 29 to 31 (hereinafter referred to as LED).
is attached.

Therefore, in order to wash and rinse in the washing tub 3, the process time is first set using the wash and rinse switch 26. That is, each time this switch 26 is pressed once, the display section 32a displays 10 → 7 → 5 → 2 → 0 → 15.
→10→... (however, if the water flow intensity is "soft", the process time starts from 5), and at the same time, the water supply solenoid valve 17a leading to the washing tub 3 is opened and water is supplied. During this water supply, the set time is not subtracted, and when the water level switch is turned OFF and the water supply stops, the subtraction starts and the rotor blades are driven at the same time.

If the water level switch does not turn off even after 15 minutes have passed after pressing the washing/rinsing switch 26,
It is determined that there is a drainage abnormality, the water supply is stopped, and the time display on the display section 32a is made to blink.

If the water injection rinsing switch 24 is set, water is supplied into the washing tub 3 as the rotary blades are driven, and so-called water injection rinsing is performed. However, if the washing/rinsing process does not start even after a predetermined period of time has passed after setting the switch 24, that is, the washing/rinsing process does not start.
If the rinse switch 26 is not operated, the setting of the water injection rinse switch 24 is automatically canceled. This prevents the possibility that if you forget to release the water inlet rinse switch 24 and then perform the next washing process, the water will be supplied again and the detergent will be flushed out even though you have put in the detergent. This is to do so.

When it is desired to stop the water supply to these washing tubs 3, the washing/rinsing time can be set to zero.

Next, by setting the dehydration time with the dehydration time setting switch 28, dehydration is performed in the dehydration tank 6. That is, each time this switch 28 is pressed, the corresponding LED 31 lights up from 3 → 1 → 0.5 → none → 5
→3→….

Note that the washing, rinsing, and spin-drying times can be changed during the process, and the set times can be memorized by continuing to press each switch 26, 28 for 2 seconds or more.
From next time onwards, this memorized time can be displayed first.

The display section 32 is composed of four digits and usually displays the time, washing and rinsing are displayed in the upper two digit display section 32a, and dehydration rinsing and dehydration time are displayed in the lower two digit display section 32b in minutes. . Time adjustment is performed by each switch 25, 26, 27.

Figure 5 shows a block circuit diagram of the control section of this washing machine, where 33 is a microcomputer that is the center of the control section, and 34 is a display consisting of a group of LEDs that display washing/rinsing and spin-drying times, water flow intensity, etc. Circuit, 35 is water level detection switch on the washing tub side, 36
37 is a safety switch that is linked to the opening and closing of the dehydration top cover.
is an operation section composed of switches 23 to 28,
38 is a buzzer circuit, 39 and 40 are motor left and right rotation drive circuits, and 41 is a water supply valve 17 leading to the washing tub 3.
42 is the water supply valve 17b leading to the dehydration tank.
43 is a finishing agent inputting part, 44 is a dehydration tank 6
45 is a dehydration motor drive circuit,
46 is a motor current detection circuit which will be described later.

The microcomputer 33 corresponds to a control device, and compares the signal from the motor current detection circuit 46 with a stored reference value, and selects laundry or dehydrated items (hereinafter referred to as load) based on the comparison result with the reference value. ), and a calculation device that calculates the process time based on a predetermined time for the detected load amount, and the input signals from the various switches are calculated. The drive of a load such as a motor is controlled based on the process time.

Now, dehydration and rinsing is performed by operating the rinse/spin switch 27. When the switch 27 is pressed once, the standard course (the cycle of dehydration-braking (water supply)-stop (water supply) is completed 4 times → finishing) (adding agent → 3 minutes of dehydration), press twice to execute the careful course (the cycle is repeated 5 times → add finishing agent → 3 minutes of dehydration), and press a third time to cancel.

The finishing agent injection starts 5 seconds before stopping from braking in the final cycle of dewatering and rinsing in each course, and is carried out during the stopping time.

Immediately after each course is set and the motor 9 starts rotating, the microcomputer 33 receives the signal from the motor current detection circuit 46, detects the load amount, calculates the time corresponding to this, and calculates the time corresponding to this amount and the dehydration time. 3 minutes of the time are added and the lower two digits are displayed on the display section 32b. Note that the dehydration time can be changed using the switch 28. Further, this load amount detection is also performed during the normal dehydration process.

By the way, when the washing/rinsing switch 26 is operated to simultaneously supply water to the washing tub 3 side during the dewatering and rinsing step, the water supply pressure to the dehydrating tub 6 side inevitably decreases, and if this continues, rinsing may not be sufficient. This may occur. Therefore, when water is supplied simultaneously, one additional cycle is added in the dewatering and rinsing process, and the reduction in water supply pressure is compensated for by extending the time required for water supply.

The following will explain based on FIG.

When the standard course is set, the dehydration and rinsing process repeats the dehydration-water supply cycle four times as shown in FIG.

Here, the microcomputer 33 checks whether water is being supplied to the washing tub 3 side (whether the water supply solenoid valve 17a is open) when water is supplied during each cycle, and checks whether water is being supplied to the washing tub 3 side (whether the water supply solenoid valve 17a is open), and at least two of the four cycles of the previous process If water is being applied at the same time (not necessarily in consecutive cycles), repeat the cycle one more time (i.e. do a thorough course).
Therefore, even if water is supplied simultaneously for only one cycle out of four cycles, no additional cycles are added.

In this embodiment, in order to simplify the program, if a careful course has been set in advance, the above-mentioned cycle is not added, but if this is done, the function as a washing machine will be improved. It will improve.

Furthermore, although at least two cycles out of four cycles are used, the present invention is not limited to this, and there is no problem even if it is only one cycle. In addition, even without adding a cycle, for example, the time required for water supply in a cycle when a simultaneous water supply signal is input may be extended.In short, the total time required for water supply during the dewatering and rinsing process can be extended. Just make it longer.

(g) Effects of the Invention The present invention solves the drop in water supply pressure to the dehydration tank side that occurs when water is supplied to both tubs at the same time in a two-tub washing machine having a dehydration and rinsing process by extending the water supply time. This makes it possible to prevent insufficient rinsing from occurring.

[Brief explanation of drawings]

Fig. 1 is a flowchart showing the progress of the dehydration and rinsing process in the present invention, Fig. 2 is a time chart of the dehydration and rinsing process, Fig. 3 is a cross-sectional front view of the main parts of a two-tub washing machine, and Fig. 4 The figure is a front view of the control box, and FIG. 5 is a block circuit diagram of the control section. 3...Washing tub, 6...Dehydration tank, 17...Double water supply solenoid valve, 18...Water supply to the washing tub, 19...
... Water supply channel to the dewatering tank, 33... Microcomputer (control device).

Claims (1)

[Claims] 1 Equipped with a water supply channel leading into the washing tub, a water supply channel leading into the dehydration tank, and a solenoid valve installed in each of these water channels, the washing/rinsing process is performed in the washing tub,
In a two-tank washing machine that performs a dewatering and rinsing process in which a cycle of dewatering and water supply is repeated in a dehydrating tank, a control device is provided to control the washing/rinsing process, the dewatering and rinsing process, and the opening and closing of each solenoid valve. The device is a two-tank washing machine characterized in that when water is supplied to both the tubs at the same time, the time required for water supply during the dehydration and rinsing step is extended.