JPS5940951Y2 - washing machine water level control device - Google Patents

Description

[Detailed description of the invention] This invention relates to a washing machine that automatically performs a series of processes such as washing and rinsing using a program timer. The purpose is to increase the rinsing effect by rinsing at a higher water level than the water level.

This will be explained below based on the drawings.

1 is a washing tank that also serves as a dehydration tank, and there is a rotary blade 2 in the center of the bottom.
, and an outer tank 3 is provided on its outer periphery.

A drive motor 4 and a bearing case 5 for rotating the rotary blade 2 and the washing tub 1 are mounted on the outer bottom surface of the outer tub 3.

Reference numeral 6 denotes a water supply channel that supplies water to the washing tub 1, and a water supply solenoid valve 7 is interposed therebetween.

31 is a drainage channel, and a drainage solenoid valve 32 is interposed therebetween.

8 is an air trap installed at the bottom of the side wall of the outer tank 3;
A pressure port 9 provided at the upper end thereof is communicated with a pressure receiving port 12 of a pressure switch 11 via a pressure hose 10.

To explain the pressure switch 11, 13 is a case;
14 is a lid having the pressure receiving port 12; 15 is a diaphragm, the periphery of which is held between the case 13 and the lid 14;

16 is a pressure transmission plate attached to the diaphragm 15; 17 is a movable contact piece whose one end is fixed to the case 13;
The tip 16' of the pressure transmitting plate 16 is inserted into a small hole 19 provided in the actuating piece 18.

A spring receiver 20 is further coupled to this tip 16'.

A movable contact 22 is attached to the tip 21 of the movable contact piece 17, and this contact 22 contacts either the normally closed contact 23 or the normally open contact 24.

A reversing spring 25 is installed between the operating piece 18 and the tip 21 of the movable contact piece.

Reference numeral 26 denotes a sliding body that is vertically slidable with respect to the case 13, and a water level setting spring 27 is interposed between this sliding body 26 and the spring receiver 20.

Reference numeral 28 denotes a mounting base fixed on the case 13. One end of an adjustment lever 29 is pivotally supported on the base 28, and the sliding body 26 is held down by a screw 30 screwed into the adjustment lever 29.

When water is supplied to the washing tub 1, the pressure inside the air trap 8 increases as the water level rises, causing the diaphragm 15 to
is lifted against the water level setting spring 27, and when it is lifted to a certain extent, the movable contact piece 1
7 is switched from the normally closed contact 23 to the normally open contact 24.

Then, the water supply solenoid valve 7 is closed and the drive motor 4 is driven to rotate the rotary blades 2 to start washing.

33 is a spring pressure adjustment solenoid that adjusts the spring pressure of the water level setting spring 27. When this solenoid 33 is energized, it pulls the plunger 34 against the spring 35, lowers the operating rod 36, and lowers the adjustment lever 29. Cut and raised piece 37
is pushed down by this operating rod 36.

In other words, the adjustment lever 29 is lowered and the screw 30 and the sliding body 2
6 to compress the water level setting spring 27 to increase the spring pressure.

That is, the solenoid 33 serves as a spring pressure increasing means.

Therefore, the water level at which the movable contact piece 17 switches to the normally open contact 24 is increased.

FIG. 3 is an electric circuit diagram, in which reference numeral 38 is a power source, 39 is a timer motor 40 to 47 for driving a program timer, and program switches built into the program timer are controlled to open and close according to the programming shown in FIG.

48 is a reversing switch that is also built into the program timer and switches in relatively short cycles.

49 is a starting capacitor for the drive motor 4; 60 is a top lid safety switch that opens when the top lid is opened;
The spring pressure adjustment solenoid 33 is connected via a program switch 47 that is closed during the rinsing process and a first manual select switch 51, which serves as a selection means for selecting whether or not to energize the solenoid 33 during the rinsing process. .

Reference numeral 52 denotes a second manual select switch, which is used to select whether or not the second rinsing process should be an overflow rinsing process in which water is continuously supplied regardless of the pressure switch 11.

Therefore, when the program timer is set for the washing process, each process is automatically performed according to the programming shown in Figure 4. However, if the manual seleno I switch 51, which is the first option, is left open, the spring pressure will be maintained even during the rinsing process. Adjustment solenoid 3
3 is not energized, rinsing is performed at the same water level as during the washing process.

(However, the second rinsing step will be an overflow rinse if the second manual select switch 52 is closed.

) However, if the first manual select switch 51 is closed, the spring pressure adjustment solenoid 33 will be energized during the rinsing process, so the water level that switches to the normally open contact 24 of the pressure switch 11 will be higher as described above, and the rinsing process will be completed. Rinsing is performed at a higher water level than during the process.

Therefore, according to the present invention, by closing the first manual select switch 51 in advance when there is a risk of violent foaming occurring during the washing process, the water level is higher than that during the washing process and the clogging is abundant. Rinsing can be performed by adjusting the amount of water, and the rinsing effect can be improved.

In FIG. 1, 53 is a cam that adjusts the pressure of the water level setting spring 27 separately from the spring pressure adjustment solenoid 33. By turning the cam 53 by turning the heir 54, the adjustment lever 29 is moved up and down, and the spring is adjusted. It adjusts the pressure and the set water level.

[Brief explanation of drawings]

The drawings show the present invention: Fig. 1 is a sectional view showing the relationship between the washing machine and the pressure switch, Fig. 2 is a perspective view of the movable contact piece, Fig. 3 is an electric circuit diagram, and Fig. 4 is a programming diagram. . 11...Pressure switch, 17...Movable contact piece, 27...Water level setting spring, 1...
Washing tub, 7... Water supply solenoid valve, 33...
Spring pressure adjustment solenoid (spring pressure increasing means) 47...
...Program switch that closes during the rinsing process, 51
...Manual select switch. 47.51 constitutes the selection means.

Claims (1)

[Scope of utility model registration request] A movable contact piece of a pressure switch is reversed against the pressure of a water level setting spring to stop the water supply to the washing tub, and a series of processes such as washing and rinsing are automatically performed by a program timer. A water level control device for a washing machine, characterized in that a spring pressure adjustment solenoid for increasing pressure is provided, and a select switch for selecting whether or not to operate the solenoid during a rinsing process is provided in the excitation circuit of this solenoid.