JPH0221017Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention relates to a water supply device for a washing machine that is improved so that the amount of water supplied per unit time can be changed depending on whether water is stored in the washing tub or during overflow rinsing. .

[Technical background of the invention]

Conventionally, in washing machines equipped with electric water supply valves,
Water supply into the washing tub is controlled by a single electric water supply valve.

[Problems with background technology]

However, with the above configuration, if the electric water supply valve discharges a large amount of water per unit time, the amount of water supplied will be too large for overflow rinsing, resulting in water splashing or exceeding the amount of water drained from the overflow port. There is a risk. However, if the amount of discharged water is set to a value suitable for overflow rinsing, a problem arises in that it takes a long time to store water in the washing tub prior to washing.

[Purpose of invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a water supply device for a washing machine which can store water in a washing tub in a short time and can supply water at an appropriate amount during overflow rinsing.

[Summary of the idea]

The present invention provides first and second electric water supply valves that share a common inlet, sets at least one of these electric water supply valves to a discharge water volume suitable for overflow rinsing, and provides a The present invention is characterized in that it is configured to be switchable between closing both electrical circuits and closing only the electrical circuit of one of the electric water supply valves, which discharges an amount of water suitable for overflow rinsing.

[Example of idea]

An embodiment of the present invention will be described below based on the drawings. In FIG. 1, reference numerals 1 and 2 are a washing tub and a dewatering tank arranged side by side in an outer box 3, and a stirring blade 5 driven by a washing motor 4 is provided in the washing tub 1, and a dehydrating tank is installed in the washing tub 1. A dehydration basket 7 driven by a dehydration motor 6 is provided inside the dehydration basket 2 . Reference numeral 8 denotes a water spray tube erected in the center of the dewatering basket 7, and its peripheral wall is formed of a porous material having water permeability.
Reference numeral 9 denotes a valve device called a double water supply valve provided in the operation box 10. For example, it is made by integrating first and second electric water supply valves 11 and 12 whose operation source is an electromagnet. The water inlets of the water supply valves 11 and 12 are made common, and the common water inlet 13 is connected to a water faucet via a pressure-resistant hose (not shown). In such a valve device 9, the second electric water supply valve 1
2 has a built-in throttling mechanism (not shown), and the throttling mechanism allows the amount of water discharged per unit time to be set to a value suitable for both overflow rinsing in the washing tub 1 and dewatering rinsing in the dewatering basket 7 (for example, 12 /minute). On the other hand, the first electric water supply valve 11 is not provided with a throttle mechanism, and the amount of water discharged per unit time is set to be larger than that of the second electric water supply valve 12. 14 and 15
are the first water supply channel on the washing tub 1 side and the second water supply channel on the dehydration basket 7 side, and the water discharged from the first electric water supply valve 11 is always supplied to the first water supply channel 14,
Further, the water discharged from the second electric water supply valve 12 is selected to the first water supply channel 14 or the second water supply channel 15 depending on the position of the switching case 17, which is changed in position from side to side by the lever 16. supplied. and,
The water supplied to the first water supply channel 14 is supplied into the washing tub 1 from the water inlet 18, and is also supplied to the second water supply channel 15.
The water supplied to the dewatering tank 2 is supplied into the water spray tube 8 from a water injector 20 provided on the inner lid 19 of the dehydration receiving tank 2. In FIG. 4, 21 is a washing timer that includes three cam switches 22 to 24 and is driven by a timer motor 25; 26 is a switch for changing the strength of the washing water flow; 28 is a changeover switch; 29 is an interlocking switch that changes in accordance with the position of the changeover case 17; , 30 is a lid switch that is closed when the outer lid 31 of the dehydration receiving tank 2 is closed, and 32 is a clockwise dehydration timer equipped with two cam switches 33 and 34, which are connected to the washing motor 4,
The dewatering motor 6 and the first and second electric water supply valves 11 and 12 are wired together as shown in FIG.
In addition, the cam switches 22 to 24 of the wash timer 21
The cam switches 23 and 24 are opened and closed as shown in the time chart in FIG. 5 (the diagonal lines indicate the closing period).
The operation of closing and opening between the middle contact piece (c-a), the contact piece (c
-b) Repeat the inter-closing with different periods. Further, the cam switches 33 and 34 of the dehydration timer 32 are opened and closed as shown in the time chart of FIG. 6 (the diagonal lines indicate the closing period).

Next, the operation of the above configuration will be explained.

(1) Detergent washing Put the laundry and detergent into the washing tub 1, move the lever 16 to the left, and move the switching case 17 to the second
Set the interlock switch 29 to the position shown in the figure (close the contacts (ca) of the interlocking switch 29), and operate the changeover switch 28 so that the contacts (ca) are closed. When the wash timer 21 is set in this state, the contacts (c-
a) A conduction path for the first electric water supply valve 11 is formed between the contact pieces (ca) of the cam switch 22 and the water level switch 27, and further between the contact pieces (ca) of the changeover switch 28. An energizing path for the second electric water supply valve 12 is formed between the contacts (ca) and the interlocking switch 29. Therefore, both electric water supply valves 11 and 12 are opened, and tap water is supplied into the washing tub 1 from the two electric water supply valves 11 and 12 through the first water supply channel 14. When the water in the washing tub 1 reaches a predetermined water level or higher, the water level switch 2 is activated.
The contact piece (c-a) of No. 7 is opened and the contact piece (c-b) is opened.
Both electric water supply valves 11 and 1
Both motors 2 and 2 are cut off to stop water supply, and at the same time, timer motor 25 and washing motor 4 are energized, and detergent washing is performed. In this case, water is supplied to the washing tub 1 by opening both the electromagnetic water supply valves 11 and 12, and unlike the case where only the first electric water supply valve 11 on the large discharge water volume side is opened, the water supply to the washing tub 1 is performed by opening both the electromagnetic water supply valves 11 and 12. As the flow rate of the water flowing through the washing tub 1 becomes slower, the flow path resistance becomes smaller accordingly, so that the amount of water supplied per unit time becomes larger, and the water supply time to the washing tub 1 can be further shortened.

(2) When rinsing the laundry after washing with detergent by overflow rinsing in the washing tub 1, in this case, the changeover switch 28 is
b) Operate so that it is closed for a while, and leave the other conditions the same as when washing with detergent. When the wash timer 21 is set and operated in this state, an energizing path for the first electric water supply valve 11 is formed between the contacts (ca) of the cam switch 22 and the water level switch 27, and the energization path of the first electric water supply valve 11 is formed between the cam switch 22 and the changeover switch 28. An energizing path for the second electric water supply valve 12 is formed between the contact pieces (c and b) and between the contact pieces (ca and a) of the interlocking switch 29. Therefore, both electric water supply valves 11 and 12 are first opened, and water is stored in the washing tub 1 in a short time. When the water in the washing tub 1 reaches a predetermined water level or higher, the water level switch 27 is activated by the contact piece (c-
b) The first electric water supply valve 11 is switched to closed during
is cut off and closed, and the timer motor 25
Then, the washing motor 4 is energized to start rinsing. At this time, the energization path of the second electric water supply valve 12 remains closed without being opened, so the second electric water supply valve 12 continues to supply water into the washing tub 1, and the water above a certain water level is The water overflows from the overflow port (not shown) of the washing tub 1 and is discharged outside the machine. Therefore, an amount of water suitable for overflow rinsing is supplied into the washing tub 1 by the second electric water supply valve 12, and if the water splashes or the amount of water exceeds the amount of water drained from the overflow port, No further inconvenience will occur.

(3) When dehydrating and rinsing the laundry after washing with detergent Transfer the laundry after washing with detergent into the space around the water spray tube 8 in the dehydration basket 7, move the lever 16 to the right, and open the switching case 17. Set it to the position shown in FIG. 3 (close the contact pieces (c-b) of the interlocking switch 29) and close the inner cover 19 and outer cover 31 (close the cover switch 30). Then, when the dehydration timer 32 is set, an energizing path for the second electric water supply valve 12 is formed between the lid switch 30, the cam switch 34, and the contacts (c-b) of the interlocking switch 29, and the lid switch 30 and cam switch 33
Thus, an energizing path for the dewatering motor 6 is formed. In the "dewatering and rinsing" process, an appropriate amount of water is supplied from the second electric water supply valve 12 to the water spray tube 8 via the second water supply channel 15 and the water injector 20, and in this state, the dehydration basket 7 is intermittently driven by a dewatering motor 6, whereby water is sprayed from the water spray tube 8 onto the surrounding laundry and is rinsed by passing through the laundry due to centrifugal force. When this "dehydration rinsing" process is completed, the cam switch 34 is opened, and the "dehydration" process is performed in which the dehydration motor 6 is continuously energized while the second electric water supply valve 12 is cut off and the water supply is stopped.
Shake off the moisture in the laundry.

Note that the amount of water discharged per unit time of the first electric water supply valve 11 may be equal to or less than that of the second electric water supply valve 12. If anything,
When storing water in the washing tub 1, use both electric water supply valves 11.
and 12 are open, the amount of water supplied per unit time is large and a predetermined amount of water can be stored in a short time. Further, the present invention may be applied to a two-tub type washing machine without a dehydrating and rinsing function, or to a washing machine having both a dehydrating and rinsing function.

[Effect of idea]

As is clear from the above description, the present invention includes two electric water supply valves, sets the amount of water discharged per unit time of at least one of them to a water amount suitable for overflow rinsing, and also sets the water flow rate of at least one of them to an amount suitable for overflow rinsing. The circuit is configured so that it can be switched between closing both circuits and closing only the energized circuit of one of the electric water supply valves, which discharges water suitable for overflow rinsing. Not only can it be done in a short amount of time, but it also has the excellent effect of being able to supply water into the washing tub at an appropriate amount of water during overflow rinsing.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of a two-tub washing machine, and FIGS. 2 and 3 are schematic diagrams of the main parts showing the switching case set in different positions. , Figure 4 is an electrical circuit diagram, Figures 5 and 6.
The figures are time charts of the cam switches of the wash timer and dehydration timer, respectively. In the figure, 1 is a washing tub, 11 and 12 are first and second electric water supply valves, 17 is a switching case, 21 is a washing timer, 27 is a water level switch, 28 is a changeover switch, and 29 is an interlocking switch.

Claims (1)

[Scope of utility model registration request] First and second electric water supply valves having a common water inlet are provided, at least one of these electric water supply valves is set to a water discharge amount suitable for overflow rinsing, and the energizing path of both electric water supply valves is set to both. A water supply device for a washing machine configured to be switchable between a case where the circuit is closed and a case where only the energized circuit of one of the electric water supply valves that discharges water suitable for overflow rinsing is closed.