JPH0538717Y2 - - Google Patents

Description

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

(b) Conventional technology Previously, Publication No. 57-40062 (D06F33/02)
In a two-tub washing machine, as shown in Figure 1, in which water is supplied to the washing tub by opening and closing the water supply solenoid valve to perform the washing and rinsing processes, detergent is not contained in the water during the washing and rinsing processes. The only difference is whether the washing machine is installed or not, but the operation itself of the washing machine is the same, so the same operating program is used to execute it.

Further, as the rinsing method of the above-mentioned rinsing step, there are two types: water injection rinsing in which water is supplied into the washing tub during the rinsing step and overflows from the water overflow port, and rinsing in which water is supplied to a specified water level and then the water supply is stopped for rinsing.
The above-mentioned publication also discloses that the two rinsing methods can be selected using a selection switch before the rinsing process is executed.

Further, during the rinsing process, stopping the water supply when a water level switch detects that water has been supplied to a predetermined level is disclosed in Japanese Patent Application Laid-Open No. 108393/1983 (D06F37/00).

(c) Problems to be solved by the invention In the washing machine mentioned above, the operating programs for the washing process and the rinsing process are common, so in the rinsing process, water injection rinsing is selected with the selection switch and the rinsing process is executed, and then the washing process is performed. If you execute the next washing process without switching to rinsing, the selection switch will remain in the water injection rinsing mode, so the water supply will not stop even if the water level reaches the specified level, causing detergent components to flow out of the water overflow opening and reducing washing performance. be.

In view of this problem, the present invention is designed to prevent the erroneous water injection rinsing operation from being performed during the washing process.

(d) Means for Solving the Problems The two-tub washing machine of the present invention includes a washing tub for storing laundry, a water supply solenoid valve that enables water to be supplied by opening to the washing tub, and a A liquid level switch that detects the specified water level and measures the rinsing time.
A timer connected in series to the water supply solenoid valve via the liquid level switch and controlling the opening/closing of an auxiliary contact a predetermined time before the end of measuring the rinse time; and a timer connected in parallel to the liquid level switch. a change-over switch connected to the water supply device that bypasses the liquid level switch by switching from a pre-rinse to a water injection rinse; and a reset means that is connected to the auxiliary contact and switches the change-over switch to a pre-rinse by controlling opening/closing of the timer. It is something.

(e) Effect: That is, if the changeover switch is switched to water rinsing, water rinsing will continue to be performed while the timer is operating, but the timer will control the opening and closing of the auxiliary contact at a predetermined time before the end of the rinsing time. Since the reset means connected to the auxiliary contact is operated to switch the changeover switch from water injection rinsing to prerinse, the changeover switch is always in the prerinse state when rinsing is completed.

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

Figure 3 shows a two-tub washing machine, where 1 is the machine frame and 2
is a synthetic resin washing tub installed inside the machine frame 1,
Although not shown in the drawings, the washing tub 2 is provided with an outer dehydration tub juxtaposed therewith. Reference numeral 3 denotes an operation box provided at the rear of the upper part of the machine frame 1, in which various operation switches, a water supply unit, a drain valve operation mechanism, etc. are housed. Reference numeral 4 denotes a large-diameter rotary blade that is disposed at the center of the bottom of the washing tub 2 and occupies most of the bottom of the washing tub 2, and is driven to be reversed left and right by a drive motor (not shown). 5
6 is an upper water supply port, 7 is a water supply channel cover that covers a lower water supply channel (not shown), 8 is a lower water supply port provided on the cover 7, and 9 is a control unit provided above the washing tub 2. , an overflow cover covering an overflow chamber (not shown), 10 a washing top lid, 11 a dehydration top lid, 12
is the drain hose, 13 is the dehydration timer knob, 14
15 is a wash timer knob, and 15 is a push-button selection button for selecting water rinse, water rinse, or rinse. When pressed, water rinse is selected.

Now, FIG. 1 shows a specific circuit of a two-tub type washing machine, where 16 is a spin-driving drive motor, 17 is a spring-reset spin-off timer, and 18 is a safety switch that opens and closes in conjunction with the opening and closing operations of the top spin-dry lid 11. , 19 is the main contact S-1 of the washing timer 20, which is closed by setting the timer using the washing timer knob 14. 21 is a washing motor for driving the rotary blade 4; 22 is a cam contact S-3 for switching left and right of the washing motor 21;
Built-in. 23 is the washing timer 20
Timer motor for recovery, 24 is normally closed (NC)
It is a type liquid level switch, and when the water level in the tank reaches the specified water level, the washing motor 21 switches to the NO side.
and forms a current supply circuit to the timer motor 23. Further, a water supply solenoid valve 25 is connected to the NC contact of the liquid level switch 24, and when the main contacts S-1 and 19 are closed, water is supplied into the washing tub 2 via this NC contact. will be carried out. 26
is an opening/closing contact that becomes a changeover switch that opens and closes in conjunction with the operation of the selection button 15, and the main contact S-
1 and 19 and the water supply solenoid valve 25 so as to bypass the liquid level switch 24. 27 is the opening/closing contact 2 when energized.
This is a reset solenoid that forcibly opens the main contact S-6 (returns the selection button 15).
1 and 19 and a cam contact S-2 (built in the washing timer 20) which serves as an auxiliary contact.

The operation will be explained based on this configuration.

First, the main contacts S-1, 19, the cam contact S-
2, S-3, 28, 22 are the washing timer 2
During the 0 setting, it operates as shown in Figure 2.

That is, in order to perform washing, the washing timer 2 is activated.
When the time limit is set to 0, the main contacts S-1, 19-
The water supply solenoid valve 25 is energized via the NC contact, and water is supplied into the tank. During this time, the timer motor 23 does not operate, so the washing timer 20 is maintained at the time setting position.

When the water level in the washing tub 2 reaches a specified value, the liquid level switch 24 is switched to the NO side to stop water supply, and the washing motor 21 and timer motor 23 are energized to operate the rotary blades for a set time period. 4 repeats inversion at a predetermined period.

Now, when the washing process is completed and a rinsing process is to be performed, the user closes the opening/closing contact 26 by pressing the selection button 15 when desiring to perform water rinsing. Then, during the time limit setting of the washing timer 20, the water supply solenoid valve 25 continues to be energized regardless of the operation of the liquid level switch 24.

As a feature of this embodiment, the main contact S
-1, 19 are turned OFF (open), the cam contacts S-2, 28 are closed and the reset solenoid 27 is energized, so the opening/closing contact 26 is forcibly opened. Ru. Therefore, the water supply operation will be stopped one second before the end of the water injection rinsing step.

(g) Effects of the invention The two-tub washing machine of the invention automatically switches the changeover switch from water injection rinsing to reserve rinsing when the timer set at the end of water injection rinsing ends. Water will not be supplied erroneously and the washing capacity will not be undesirably lowered.

[Brief explanation of the drawing]

Figure 1 is an electrical circuit diagram of the washing machine of the present invention.
Figure 2 is a time chart showing the cam operation as well.
FIG. 3 is a partially cutaway perspective view of the washing machine, and FIG. 4 is a front view of the main parts of the operation box. 19... Main contact (main timer contact), 25...
Water supply solenoid valve, 26... Opening/closing contact, 27... Reset solenoid, 28... Cam contact (S-2), (2
7, 28: Reset means).

Claims (1)

[Scope of utility model claims] The pre-rinsing and water injection rinsing times are controlled by a timer having a main contact and an auxiliary contact, water is supplied during both rinsing via a water supply solenoid valve, and during pre-rinsing, a specified water level is detected by a liquid level switch, and the water supply solenoid is The water supply solenoid valve is connected to the main contact of the timer in such a manner that the water supply is stopped by closing the valve, the liquid level switch is deactivated during water injection rinsing, and the water supply solenoid valve is opened to continue water supply. are connected in series, and a manual changeover switch that bypasses the liquid level switch by switching from the preliminary rinsing to the water injection rinsing is connected in parallel to the liquid level switch,
When rinsing with water by changing the manual changeover switch, a reset solenoid is set on the timer to forcibly change the manual changeover switch to the test rinse mode before or at the same time as the main contact opens and closes for a predetermined time when the timer setting time ends. A two-tub washing machine characterized by being connected to an auxiliary contact.