JPS585593Y2 - Agitation washing machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to an agitating washing machine in which the agitating blades for agitating and washing the laundry are directly connected to the rotor of a motor, or directly connected through an appropriate speed reduction mechanism only during washing. The purpose is to reduce power consumption and motor heat generation by switching the motor winding specifications depending on the time and torque required during dehydration.

In agitator-type washing machines, the rotary motion of the motor in a fixed direction is decelerated by gears, and the rotary motion is converted into reciprocating rotary motion using racks, pinions, etc., but this method is expensive to produce, generates noise, and causes wear and tear. This has not always been sufficient in terms of reliability, as it may cause mechanical failures.

In addition, this type of washing machine that is directly connected to a motor, in which the reciprocating rotation of the stirring blades is performed by the reciprocating rotation of the motor's rotor, requires high torque during washing, but the torque decreases dramatically during high-speed rotation during spin-drying. As a result, the motor rotation speed became too high, making it necessary to control the rotation speed to prevent vibration and noise.

The present invention was developed to solve the above-mentioned conventional problems, and one embodiment thereof will be described in detail below.

FIG. 1 shows a broken sectional view of a washing machine, in which 1 is an outer frame, 2 is an outer tank, and 3 is a washing tub/dewatering tub (hereinafter simply referred to as an "inner tub").

4 is a stirring blade that stirs the laundry in the inner tub 3; 5 is a stirring blade 4
Alternatively, a clutch mechanism 6 is a motor having an axial gap structure, and its rotor shaft is connected to the clutch mechanism 5.

7 is a drain valve magnet that controls the clutch mechanism 5 and the drain valve.

A vibration isolation mechanism 8 is suspended from the outer frame 1 and is connected to the outer tank 2 to provide vibration isolation support.

FIGS. 2 and 3 show electrical circuit diagrams, with FIG. 2 showing the connection state during washing, and FIG. 3 showing the connection state during dehydration.

In the figure, 9 is the first winding of the main windings, 9a is the second winding of the main windings, 10 is the first winding of the auxiliary windings, and 10a is the first winding of the auxiliary windings. 11 is an AC power supply, 12 is a switch for selecting the rotation direction of the motor 6, 1
3 is a switch for opening and closing 14a of the capacitors 14, 14a, 15a, 15b, 16a, 1
6b is a switch group for connecting the windings of the motor 6 in parallel or in series.

Capacitors 14 and 14a represent capacitors for starting and operating the motor 6.

Next, to explain the specific operation, during washing, as shown in FIG. 4, the torque characteristic A of the load requires high torque at low speed rotation, so the motor 6 also requires high torque as shown in characteristic a. .

Therefore, as shown in FIG.
10a are connected in parallel to form a circuit that reduces the number of turns, increases the wire diameter, and generates high torque, and the capacitor 14a is connected by closing the switch 13.

With such a connection, the switch 12 is switched at regular intervals to operate the motor 6 in forward and reverse directions, thereby causing the stirring blades 4 to reciprocate and perform washing.

During dehydration, as shown in Figure 4, the torque characteristic B of the load is high speed rotation, and the torque is lower than during washing, so if the motor is operated with the same wire connections as during washing, The rotational speed of the motor that drives the inner tank becomes too high, resulting in increased vibration and noise.

Therefore, the connection state as shown in FIG. 3 is changed from the initial stage of dehydration, but is changed after the start of dehydration in order to hasten the start-up rotation of dehydration.

In Fig. 3, in each of the main winding and auxiliary winding, the first winding 9, 10 and the second winding 9a, lQa are connected in series to increase the number of windings, and the number of dehydration rotations is increased. At the same time, it is possible to suppress the rotation speed to an appropriate level, reduce power consumption, and suppress heat generation of the motor as much as possible.

At this time, the capacitor 14a is disconnected by opening the switch 13.

In this embodiment, the first windings 9, 10 and the second windings 9a, 10a are provided for both the main winding and the auxiliary winding, but only one of the main winding or the auxiliary winding is provided. 1st. Even when the second winding is provided, the same effects as in this embodiment can be obtained.

Further, it goes without saying that it is preferable that the above-mentioned switch group be completely switched in conjunction with a single operation.

As described above, according to the present invention, by switching the connection state of the motor windings according to the load torque during washing and dehydration, an operating state suitable for the load condition is achieved, high torque is generated during washing, and dehydration is performed. At times, low torque can be used, reducing power consumption and suppressing motor heat generation.Also, by switching the motor connection state, the rotation speed can be adjusted according to the load condition, making it possible to eliminate complex motor rotation speed control circuits. Since this is not necessary, a highly reliable washing machine can be provided at a low price.

[Brief explanation of drawings]

Figure 1 is a sectional view of a washing machine according to an embodiment of the present invention, Figure 2 is a diagram showing the circuit configuration during washing, Figure 3 is a diagram showing the circuit configuration during dehydration, and Figure 4 is the load FIG. 3 is a diagram showing the torque characteristics of the motor. 3... Washing tub/dehydration tank, 4... Stirring blade, 5... Clutch mechanism, 6... Motor, 9.10...・First winding, 9a10a...
...Second winding, 14a...Capacitor, 15
a15 b, 16 a, 16 b...Switch group.

Claims (1)

[Scope of utility model registration request] The rotating shafts of the washing tub and dewatering tank and the stirring blade are coaxially arranged, and the rotor shaft of the motor is directly connected to the rotating shaft via a clutch mechanism, and at least one of the main winding and the auxiliary winding of the motor is connected to the rotating shaft. This is an agitating washing machine with a winding composed of a first winding and a second winding, in which the first winding and the second winding are connected in parallel during washing, and the first winding and the second winding are connected during dehydration. This agitation type washing machine is provided with a switch means for connecting the second winding in series, and the capacitance of a capacitor for starting and operating the motor is set to be smaller during spin-drying than during washing.