JPH02302296A - Electric washing machine - Google Patents

Abstract

PURPOSE:To attain the product assembling independently of the operating power supply voltage of the washing machine by devising the washing machine such that the connection of a capacitor and windings of a motor is changed over automatically corresponding to the power voltage. CONSTITUTION:When a power supply E of 117VAC is supplied from terminals T1, T2, a relay RY is not energized, a gate signal is outputted from a control power supply CC1 to a two-way thyristor TA, then the voltage 117VAC is applied to a main winding L2 and the voltage 117VAC is applied to an auxiliary winding L4 via a parallel circuit comprising capacitors C1,C2 to drive a washing machine motor in the forward direction. When a gate signal is outputted to a 2-way thyristor TB, the voltage 117VAC is applied to the auxiliary winding L4, the voltage 117VAC is applied to the main winding L2 via a parallel circuit comprising the capacitors C1, C2 and the motor is driven reverse. When a power voltage E of 220VAC is supplied, since the relay RY is energized, the voltage 220VAC is applied to a series circuit comprising the main windings L1, L2 and the voltage 220VAC is applied to the series circuit comprising the auxiliary windings L3, L4 via the series circuit comprising the capacitors C1, C2 and the motor is driven forward. When the voltage 220VAC is applied to the series circuit comprising the auxiliary windings L3, L4, the voltage 220VAC is applied to the series circuit comprising the main windings L1, L2 via the via the series circuit comprising the capacitors C1, C2 and the motor is driven reverse.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electric washing machine mainly used in ordinary households.

(b) Conventional technology Conventional electric washing? In the U machine, the number of poles of the motor and the capacity of the capacitor are automatically changed using a water flow changeover switch (for example, RS,
(See Japanese Patent Laid-Open No. 60-45389) and common control circuits by switching connectors and jumper wires for different input power supply voltages.
etc. are known.

(C) Problems to be Solved by the Invention However, when supplying washing machines to regions with different power supply voltages, the wiring must be wired to match the R voltage of the destination during assembly before being shipped. The current situation is that

The present invention has been made in consideration of the above-mentioned circumstances, and it is an object of the present invention to provide an electric washing machine that can automatically switch the connection depending on the power supply voltage used.

(d) Means for Solving the Problems This invention provides an electric IN machine driven by a capacitor induction motor, in which the capacitor induction motor can be driven by switching connections for at least two types of input power supply voltages, high and low. has a winding and a capacitor, and
The electric washing machine is characterized by comprising a detection means for detecting the level of input power supply voltage, and a switching means for switching the connection between the winding and the capacitor in response to the level of the input power supply voltage. Note that, for example, a voltage relay may be used to serve both as the detection means and the switching means.

(e) Operation When the voltage of the power supply input to the electric washing machine differs, the detection means detects it, and the switching means automatically switches the connection of the capacitor and winding of the motor in accordance with the power supply voltage. Therefore, for destinations with different power supply voltages, e.g.
When supplying washing machines to areas with 7V and AC220V, it becomes possible to assemble them regardless of the power supply voltage used, standardizing products and improving the productivity of washing machines.

(f) Examples The present invention will now be described in detail based on examples shown in the drawings. This invention is not limited by this.

Cocoteha will talk about washing machines that supply power to areas with AC 117V and AC 220V.

FIG. 1 is an electric circuit diagram showing an embodiment of the present invention.
T1. T2 is a power input terminal (for example, a plug), RY is an AC/DC voltage relay with a rating of 220■, RC is a relay coil of relay RY, CTI to CTl0 are relay contacts of relay RY, Ll and L2 are the main windings of the washing machine motor , L3. L4 is an auxiliary winding of the washer/II machine motor, and CI and C2 are motor capacitors. The washing machine motor has main winding L2 AC
Apply 117V and connect capacitors C1 and C to auxiliary winding L4.
When 117V AC is applied through the parallel circuit of 2, it rotates forward, 117V AC is applied to the auxiliary winding L4, and 117V AC is applied to the main winding L2 through the parallel circuit of capacitors C1 and C2.
When applied, it reverses.

Further, the washing machine motor has a main winding L1. Apply 220V AC to the series circuit of L2, and connect the auxiliary winding L3. AC220 is connected to the series circuit of L4 through the series circuit of capacitors C1 and C2.
When V is applied, the auxiliary winding L3. AC220V is applied to the series circuit of L4, and AC220V is applied to the series circuit of main windings Ll and L2 via the series circuit of capacitors CI and 'C2.
When 20V is applied, the rotation is reversed. TRI
is a control power transformer, and its secondary coil is 117
Equipped with tap & for 220V and tap b for 220V. T
A, TB are bidirectional thyristors for forward and reverse rotation of washing machine motor, C
C1 is a control circuit that controls the bidirectional thyristors TA, TB, and others.

In such a configuration, when the AC 117V power E is supplied through the terminals TI, T2, the relay RY is not activated and the relay contacts CTI, CT3 . CT4. Cr2. C
r2°Cr2. Since CTl0 remains closed, A Ctt7v'' is supplied to tap a of transformer TRI,
A predetermined AC power is supplied to the control circuit CCI. Therefore, when a gate signal is output from the control power supply CC1 to the bidirectional thyrisk TA, the bidirectional thyrisk TA becomes conductive.
AC 117V is applied to the main winding L2, and A
Since C117V is applied, the washing machine motor rotates forward. In addition, when a gate signal is output from the control circuit CCI to the bidirectional thyristor TB, the bidirectional thyristor T
B becomes conductive, and 117 VAC is applied to the auxiliary winding L4, and 117 VAC is also applied to the main winding L2 via the parallel circuit of capacitors C1 and C2, so that the washing machine motor rotates in reverse.

Next, when AC22QV electricity iE is supplied through terminals TI and T2, relay RY is activated, so relay contact CT2. CT5. CT8. CT11 becomes a closed circuit,
Other relay contacts become open circuits. As a result, AC 220V is applied to tap b of the transformer TRI, and a predetermined delivery voltage is applied to the control circuit CCI. Control circuit C
When a gate signal is supplied from C1 to bidirectional thyristor TA, main winding L1. When AC220V is applied to the series circuit of L2, the auxiliary winding lL3. AC220 is applied to the series circuit of L4 through the series circuit of capacitors CI and C2, and the washing motor rotates normally. In addition, the control circuit C
When a gate signal is supplied to the bidirectional thyristor TB from the bidirectional thyristor TB, the bidirectional thyristor TB becomes conductive and the auxiliary winding L3.
Since 220 VAC is applied to the series circuit of L4, and furthermore, 220 VAC is applied to the series circuit of main windings Ll and L2 via the series circuit of capacitors CI and C2, the washing machine motor rotates in reverse.

In this way, the voltage of the power supply E supplied is AC117
The washing machine can operate normally whether the voltage is V or AC220V.

FIG. 2 is an electric circuit diagram showing another embodiment of the present invention, in which the relay contacts CT1 to CT9 of the embodiment shown in FIG. 1 are replaced with bidirectional thyristors T1 to T9. G eye, two-way Cyrisk TI, T3゜T4. TB, T7. G2 is a gate circuit that supplies a gate signal to T9, and G2 is a bidirectional thyristor T2. T5゜Gate circuit that supplies gate signals to TB, TR2 is rated AC 220V nodrance, NV is AC
11? An inverter circuit that receives an input of V to 220V and outputs a constant DC voltage (for example, 12V), CC2 operates in response to the constant voltage DC output of the inverter circuit NV, and controls the bidirectional thyristors TA, TB, and others. It is a control circuit.゛The output winding of transformer TR2 is a diode DI,
It is converted into a DC voltage V2 by a rectifying and smoothing circuit consisting of a capacitor C3 and a resistor R1. On the other hand, inverter circuit N
One of the DC outputs of V is divided by the voltage dividing resistors ER2 and R3, and is input as the reference voltage Vt to the comparator CP via the resistor R5. The output v2 of the DC smoothing circuit is input to the comparator CP via the resistor R4, and the reference voltage V2 is input to the comparator CP through the resistor R4.
The output of the comparator CP is compared with the control circuit CC
2 is input.

In such a configuration, when the AC 117V power supply E is supplied, the voltage V2 becomes lower than the reference voltage Vl as shown in FIG. 3(a), so the output of the comparator CP becomes L level, and the control Circuit CC2 is gate circuit CI
Outputs a drive signal to. The gate circuit Gl thereby bidirectionally switches TI, T3 . T4. TB, T7. T9
conduction.

Therefore, the control circuit CG2 is controlled by the bidirectional thyristor TA or T.
When a gate signal is supplied to B and the bidirectional thyristor TA becomes conductive, the washing machine motor rotates in the forward direction, similar to the embodiment shown in FIG. 1, and when the bidirectional thyristor TB becomes conductive, the washing machine motor rotates in the reverse direction.

Next, when a 220V AC power source EIJ<p is supplied, the voltage V2 becomes the reference voltage Vl as shown in FIG. 3(b).
Since the output of the comparator CP becomes H level, the control circuit CC2 outputs a drive signal to the gate circuit G2. The gate circuit G2 is a bidirectional thyristor T2.
T8. Make T5 conductive.

Therefore, similarly to the embodiment shown in FIG. 1, when the bidirectional thyristor TA is conductive, the washing machine motor rotates in the forward direction, and when the bidirectional thyristor TB is conductive, the washing machine motor rotates in the reverse direction. In this way, A
The washing machine operates normally with both 0V and 220V power supplies.

(G) Effects of the Invention According to the present invention, when assembling a washing machine, there is no need to distinguish between motor specifications depending on the power supply voltage of the destination, so products can be standardized, and productivity is improved.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing one embodiment of the present invention, and FIG.
The figure is an electric circuit diagram showing another embodiment of the present invention, and FIG. 3 is an explanatory diagram showing the relationship between the detected voltage and the reference voltage in the embodiment shown in FIG. 2. ↑ 1 Figure 13

Claims (1)

[Claims] 1. In an electric washing machine driven by a capacitor induction motor, the capacitor induction motor has a winding and a capacitor that can be driven by switching connections for at least two types of high and low input power supply voltages. An electric washing machine, further comprising: a detection means for detecting the level of the input power supply voltage; and a switching means for switching the connection between the winding and the capacitor in accordance with the level of the input power supply voltage.