JPS62715B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-tub washing machine having a so-called dehydrating and rinsing function.

In recent years, some two-tub washing machines have been designed to perform so-called dewatering and rinsing by supplying water to a dehydrating basket while rotating it. This type of two-tub washing machine needs to be configured to be able to selectively supply water to the washing tub and spin-drying basket, and recently, as a means of achieving this, a solenoid valve connected to the water faucet has been developed. The water supply pipes are connected so as to be pivotable, and the water supply pipes are rotated so as to face the washing tub or the dehydration basket, so that water can be selectively supplied to each of them, and the water supply pipe is placed on the side of the dehydration basket. When the spindle is rotated, an energizing path for the electromagnetic valve via the dehydration timer is formed, so that water supply to the dehydration basket is not continued even after the dehydration motor is cut off. By the way, the detergent washing operation is performed by dissolving the detergent in a certain amount of water stored in the washing tub, and it is necessary to avoid continuing to supply water to the washing tub during the detergent washing operation, so the above configuration However, when it comes to water supply to the washing tub, the electromagnetic valve is not configured to be controlled to turn on or off using a washing timer. Therefore, in so-called overflow rinsing (rinsing that is performed by constantly supplying water to the washing tub and letting dirty water flow out from the overflow port), if you are not careful, the water supply will continue even after the overflow is finished, resulting in wasted water. This causes the inconvenience of becoming

The present invention has been made in view of the above circumstances, and it is possible to control water supply by a washing timer and a dehydration timer during overflow rinsing and dehydration rinsing, thereby preventing wastage of water and detergent. To provide a two-tub type washing machine which can perform washing without causing the inconvenience of constantly supplying water to the washing tub.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. First, in FIG. 1, reference numeral 1 denotes an outer box of a two-tub washing machine, inside which a washing tub 2 and a dehydrating tub 3 are arranged side by side. In addition, a dehydration basket 7 driven by a dehydration motor 6 is provided in the dehydration tank 3. 8 is a drain hose, one end of which is branched into three branches, the first branch end is connected to the drain port 10 of the washing tub 2 via the drain valve 9, and the second branch end is connected to the drain port 10 of the washing tub 2. Mouth part 2a
The remaining third branch end is connected to the drain port 11 of the dehydration tank 3. Reference numeral 12 denotes an operation box, which includes a washing timer 13 operated by a knob 13a;
In addition to a washing water flow changeover switch 14 operated by push buttons 14a and 14b and a dehydration timer 15 operated by a knob 15a, a drain valve operating knob 16 and an electric valve such as a solenoid valve 17 are provided. The drain valve operating knob 16 is set to the position shown in FIG. 1 (hereinafter referred to as the intermediate position) when washing with detergent, and is set approximately 90 degrees to the right from the intermediate position during rinsing.
When draining, the drain valve is rotated approximately 90 degrees to the left from the intermediate position (hereinafter referred to as the left rotation position). The drain valve 9 opens only when the drain valve 16 is set in the counterclockwise rotation position. on the other hand,
Two water supply pipes 18 and 19 are connected to the solenoid valve 17.
One water supply pipe 18 is connected to a water supply device 20 facing inside the washing tub 2, and the other water supply pipe 19 is connected to the back of the inner lid 21 of the dehydration tank 3 and inside the dehydration basket 7. Connect to the water supply device 22 installed facing the
A switching lever 23 selectively switches the water supply to the water supplies 20 and 22.
In addition, 24 is an outer lid of the dehydration tank 3, 25 is a water spray tube installed in the center of the dehydration basket 7, and 26 is a removable clothes holding lid attached to the upper opening of the dehydration basket 7.

Next, in FIG. 2 showing the electric circuit configuration, 27
is a first changeover switch device having two switches 28 and 29, in which the changeover lever 23 is connected to the water supply device 20.
Therefore, when the washing tub 2 is operated to be supplied with water, the switch 28 is turned on, and the switching lever 23 is switched to the water supply device 22.
Therefore, when the dewatering basket 7 is operated to be supplied with water, the switch 29 is turned on. Reference numeral 30 denotes a second changeover switch device, which is switched in response to the operation of the drain valve operation knob 16 when the drain valve is in the closed state. When set to the intermediate position, the movable contact piece c and fixed contact piece a are closed, and the drain valve operation knob 1 is closed.
6 is set in the clockwise rotation position, the movable contact piece c and the fixed contact piece b are closed. Further, 31 is a lid switch that opens and closes in response to opening and closing of the outer lid 24 of the dehydration tank 3;
2 is a buzzer for notifying the end of washing and dehydration, 33
is a fuse, and 34 and 35 are a pair of input terminals connected to a power supply (not shown).
and 35, the washing motor 4, dehydration motor 6, washing timer 13, washing water flow changeover switch 14, dehydration timer 15, solenoid valve 17, first changeover switch device 27, second changeover switch device 30 and the lid switch 31 are connected as shown in FIG. Here, the connection relationship will be explained with respect to the portion directly related to the present invention. That is, the washing timer 13 includes two cam switches 3 in addition to reversing cam switches 36 and 37 for strong and weak water flow.
8 and 39, the movable contact piece c of the cam switch 38 is connected to one input terminal 34, and the fixed contact piece a is connected to the cam switch 39 and the buzzer 3.
2 to the other input terminal 35.
Then, the fixed contact piece b of the cam switch 38 is connected to the fixed contact piece b of the second changeover switch device 30, and the fixed contact piece a of the second changeover switch device 30 is connected to one input terminal 34, Movable contact piece c
via one switch 28 of the first changeover switch device 27 and the other input terminal 35 of the solenoid valve 17.
and the contact piece (c-b) of the cam switch 38 of the washing timer 13 and the contact piece (c-b) corresponding to one switch of the second changeover switch device 30.
b) series circuit and the second changeover switch device 30
A contact piece (ca) corresponding to the other switch is connected in parallel, and this parallel circuit is connected to the solenoid valve 17 via the switch 28 of the first changeover switch device 27. Further, the dehydration timer 15 can select between a dehydration rinse operation and a dehydration operation, and has three cam switches 40 to 42 that have different opening/closing patterns depending on the operation, and one input terminal 34 is connected to the lid switch. 31, and the first branch end is connected to a cam switch 40 and a dewatering motor 6.
The second branch end is connected to the other input terminal 35 via the cam switch 41, the other switch 29 of the first changeover switch device 27, and the solenoid valve 17, The third branch end is connected to the other input terminal 35 via a cam switch 42 and a buzzer 32. Thus, the cam switches 38 and 39 of the washing timer 13 and the cam switches 40 to 42 of the dehydration timer 15
is set to close during the period indicated by diagonal lines in FIG.

Now, in the case of this embodiment configured as above,
The solenoid valve 17 is connected to a water faucet via a hose (not shown), and washing is performed with the faucet in an open state. The valve operating knob 16 is set to the intermediate position, and the switching lever 23 is slid from the center position shown in FIG. 1 to the left in the drawing to set water to be supplied to the washing tub 2. As a result, the second changeover switch device 30
Since the contact piece (c-a) and the switch 28 of the first changeover switch device 27 are both closed, the solenoid valve 17 is energized and opens, and water is supplied from the water supply device 20 to the washing tub 2. When the switching lever 23 is returned to the center position when the desired water level is reached, the switch 28 is opened, so that the electromagnetic valve 17 is cut off and operated to close, stopping the water supply. After that, the laundry and detergent are put into the washing tub 2, and the washing timer 13
When set, the washing motor 4 is energized and a detergent washing operation is performed. During this operation, the contact piece (c-b) of the cam switch 38 of the washing timer 13 is in a closed state, but the second changeover switch device 30
Since the contact piece (c-b) is open, water is not supplied to the washing tub 2. In order to drain the water in the washing tub 2 after washing with detergent, the drain valve operating knob 16 may be set to the left rotation position and the drain valve 9 may be opened. Next, after washing with detergent, to perform dehydration rinsing, transfer the laundry to the dehydration basket 7, and slide the switching lever 23 from the center position to the right to set water to be supplied to the dehydration basket 7 (close the switch 29). ), and then set the dehydration timer 15 to the third
This is set at the start area of the "dehydration rinse" process shown in the figure. Then, the solenoid valve 17 is activated by the cam switch 4.
1 and the switch 29 to open and supply water from the water supply device 22 to the water spray barrel 25. At the same time, the dewatering motor 6 is powered via the cam switch 40 to rotationally drive the dewatering basket 7, so the water spray barrel is opened. The water supplied to the water spray tube 25 is spouted out from the water spray barrel 25, permeates into the laundry, and is discharged into the dehydration tank 3 together with the detergent contained therein. During the "dewatering and rinsing" process, the cam switch 40 repeats opening and closing several times, so the dehydration basket 7 repeats inertial rotation and forced rotation by the dehydration motor 6. When the "dehydration rinsing" process shifts to the "dehydration" process, the electromagnetic valve 17 is cut off by the opening of the cam switch 41 and water supply is stopped, but the dewatering motor 6 is turned off by the opening of the cam switch 41.
The dewatering basket 7 continues to be rotated by keeping it closed, and the laundry is dehydrated. After completing the dehydration and rinsing, transfer the laundry to the washing tub 2, and then press the switching lever 2.
3 to the left to set water to be supplied to the washing tub 2 (switch 28 closed), and set the drain valve operating knob 16 to the intermediate position (the contact piece (c) of the second changeover switch device 30 -a), water is supplied to the washing tub 2 in the same manner as described above. Then, when the desired water level is reached,
While setting the drain valve operation knob 16 to the right rotation position (the contact piece of the second changeover switch device 30 (c-
b) When the washing timer 13 is set, the solenoid valve 17 is energized via the cam switch 38, the contacts (c-b) of the second changeover switch device 30, and the switch 28, and is opened. , washing tub 2
At the same time, the washing motor 4 is energized and overflow rinsing is performed.
When the cam switch 28 is opened and overflow rinsing is completed, the electromagnetic valve 17 is simultaneously cut off and operated to close, stopping the water supply to the washing tub 2. After the rinsing operation, the laundry is transferred to the dehydration basket 7, and the dehydration timer 15 is set to "dehydration".
It is set at the start area of the process and is used to dehydrate the laundry after rinsing.

As described above, according to this embodiment, the water supply can be controlled by the washing timer 13 and the dehydration timer 15 during overflow rinsing and dehydration rinsing, respectively, so that the inconvenience that water supply continues even after each operation is stopped can be effectively avoided. It is possible to prevent water damage and save water, and the washing tub 2 is always used when washing detergent.
If water is supplied to the area, such inconveniences will not occur.

Furthermore, since the contact piece (c-a) of the second changeover switch device 30 can form a parallel energizing path with the cam switch 38 of the washing timer 13, the washing timer 13 does not have to be set. In either case, it is possible to energize the electromagnetic valve 17 and start supplying water to the washing tub 2 simply by operating the second changeover switch device 30. Therefore, water can be supplied to the washing tub 2 separately from the washing timer 13, and the ease of handling is improved. Also, unlike the configuration in which the electromagnetic valve 17 is energized on the condition that the washing timer 13 is set, the time setting of the washing timer 13 is done taking into account the time required to supply water to the washing tub 2. Therefore, the entire time set on the washing timer 13 can be spent on washing itself, and the washing can be done well.

Furthermore, the second switch device 30 operates the drain valve operating knob 16 when the drain valve is in the closed state, specifically, rotates the drain valve operating knob 16 to an intermediate position and a clockwise rotation position. Therefore, when starting water supply to the washing tub 2, even if the drain valve operating knob 16 is in the left rotation position (drain valve open), it must be reset to the intermediate position. Therefore, it is possible to prevent the problem of starting water supply to the washing tub 2 while the drain valve remains open. Moreover, the dehydration timer 15 can select between dehydration rinsing and dehydration.
Since the water supply to the dehydration basket 7 is started only when dehydration and rinsing is selected, even if the switch 29 of the first changeover switch device 27 is in the closed state, water is not supplied to the dehydration basket 7 during normal dehydration. The problems mentioned above do not occur when water is supplied.

Further, as in this embodiment, the desired changeover can be achieved with a relatively simple circuit configuration of providing the first changeover switch device 27 and the second changeover switch device 30 and connecting these as shown in FIG. Because it accomplishes its purpose, it can be provided at a low price.

The cam switch 41 of the dehydration timer 15 may also be configured to repeatedly close and open like the cam switch 40.

Next, FIG. 4 shows another embodiment of the present invention, which differs from the previous embodiment in that the fixed contact piece a of the second changeover switch device 30 is connected to one input terminal via the water level switch 43. It is located where it is connected to 34. The water level switch 43 is configured to open in response to the water level in the washing tub 2 reaching a predetermined water level. When water is supplied, the water level switch 43 opens and the electromagnetic valve 17 is cut off. Therefore, when supplying water by closing the contacts (c-a) of the second changeover switch device 30, the water supply stop operation is necessary. There is no need to do this, and operability can be improved.

In FIG. 4, the same parts as those in FIG. 2 are given the same reference numerals, and their explanations are omitted.

As is clear from the above description, the present invention is capable of controlling water supply during overflow rinsing and dehydration rinsing using a washing timer and a dehydration timer, thereby preventing wasted water and detergent washing. In some cases, this can be done without the inconvenience of having to constantly supply water to the washing tub. Furthermore, when supplying water to the washing tub, it can be started independently of the operation of the washing timer and with the drain valve closed, making it easy to handle and allowing the supplied water to be There are various practical advantages such as there is no risk of problems such as unnecessary discharge outside the machine, and furthermore, there is no risk of problems such as water being supplied to the dehydration basket during normal dehydration. An effective two-tub washing machine can be provided.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
FIG. 1 is an overall longitudinal sectional front view, FIG. 2 is an electric circuit configuration diagram, FIG. 3 is a time chart, and FIG. 4 is a diagram equivalent to FIG. 2 showing another embodiment of the present invention. In the figure, 2 is a washing tank, 3 is a dehydration tank, 5 is a stirring blade,
7 is a dehydration basket, 13 is a washing timer, 15 is a dehydration timer, 17 is a solenoid valve (electric valve), 16 is a drain valve operation knob, 20 and 22 are water supply devices, 23 is a switching lever, and 27 is a first A changeover switch device, 30 is a second changeover switch device, and 43 is a water level switch.

Claims (1)

[Scope of Claims] 1. A washing tub equipped with an internal stirring blade and a dehydration tank with an internal dehydration basket, in which water from an electric valve is switched to be selectively supplied to the washing tub and the dehydration tank. , a laundry timer that controls the washing operation time, a dehydration timer that is selectable between dehydration rinsing operation and dehydration operation and that controls each operation time, and a first changeover switch that operates to switch in response to the water supply switching operation. and a second changeover switch device that switches in response to the operation of the drain valve operation knob when the drain valve is in the closed state, and provided that the washing tub is operated to supply water. A case where the water supply by the motor-operated valve is controlled by the laundry timer by forming an energizing path through the laundry timer and the second changeover switch device in series by the switching operation of the second changeover switch device; It is possible to select the case where an energizing path is formed in parallel with the laundry timer and the control is performed by a second changeover switch device, and the operation is performed to supply water to the dehydration basket, and the dehydration timer is set to dehydration rinse operation. A two-tub washing machine, characterized in that a circuit is connected so that water supply by the electric valve is controlled by a spin-drying timer on the condition that the electric valve is set. 2. A series circuit between the cam switch of the washing timer and one switch of the second changeover switch device and the other switch of the second changeover switch device are connected in parallel, and this parallel circuit connects one switch of the first changeover switch. Claim 1, characterized in that the device is connected to the electric valve via a switch, and a series circuit between the cam switch of the dehydration timer and the other switch of the first changeover switch device is connected to the electric valve. The two-tub washing machine described in . 3. A water level switch that responds to the water level of the washing tub is provided, and the circuit is connected so that when the water supply by the electric valve is selected to be controlled by the second changeover switch device, the water supply is stopped by the water level switch. A two-tub washing machine according to claim 1 or 2.