JPH03285596A - Washing machine - Google Patents

Abstract

PURPOSE:To make a time limit set in a timer, coincide with an actual time in either case of 50Hz or 60Hz of power supply frequency by a method wherein the time limit of washing operation is controlled by a timer equipped with a timer motor consisting of a synchronous motor. CONSTITUTION:A frequency discriminating circuit 21 as a frequency discriminating means is connected between power supply lines 17a, 17b and discriminates whether a frequency is 50Hz or 60Hz. A control circuit 22 and a gate trigger circuit 23 output a phase control signal for 50Hz or 60Hz to input it into the gate trigger circuit 23 and control the ON/OFF of a triode AC switch 19. A timer motor 12 approaches the OFF point of a cam switch with the same speed when the power supply frequency is either 50Hz or 60Hz to put the cam switch 15 OFF and disconnect the electricity of the timer motor 12 and a washing machine motor 20. According to this method, the scale indication of a timer knob can be one kind.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a washing machine in which washing operation is controlled by a timer equipped with a timer motor consisting of a synchronous motor.

(Prior Art) Conventionally, for example, in a two-tub type washing machine, the washing operation is time-limited by driving and controlling the washing machine motor and the like using a timer equipped with a timer motor consisting of a synchronous motor. In this case, the timer motor rotates at a speed that corresponds to the power supply frequency to measure time, which is 60 Hz.
In this case, it rotates at a speed 1.2 times faster than 50Hz.

(Problems to be Solved by the Invention) However, with the above-mentioned conventional washing machine, there are cases where the washing machine is used in an area where the power frequency is 50 Hz, and when the washing machine is used in an area where the power frequency is 6.
When used in an area with a frequency of 0Hz, if the timer knob is set to the same amount of operation displacement, a time limit of "10 minutes" will be counted when the frequency is 50Hz, but "10 minutes" will be counted when the frequency is 60Hz. The time limit is approximately 8.3 minutes.

Therefore, conventionally, as shown in FIG. 4, the timer knob 1 is provided with a 50Hz scale display section 2 and a 60H2 scale display section 3 as time scale display sections for timer setting. ing. To explain how to read this display section 2.3, for example, when the operation knob 1 is set to the angular position shown by the two-dot chain line A, the power supply frequency is 5.
In the case of 0 Hz, the set time is "10 minutes", and in the case of 60 Hz, the set time is "about 8.3 minutes".

Further, when the timer knob 1 is set to the angular position shown by the dashed line B, when the power frequency is 50 Hz, the set time is ``12 minutes'', and when the power frequency is 60 Hz, the set time is ``rlO minutes''.

However, with such double display, it is difficult to understand the set time limit, which causes a problem in which the actual washing operation time exceeds or falls short of the desired washing operation time. In addition, one scale display section is provided as a scale display section, and a timer of a different model (a model whose output rotation speed differs depending on the frequency) is used for the washing machine for the 50Hz region and for the washing machine for the 60H2 region. It is possible to incorporate it, but this would cause problems if the area where the washing machine is used changes, and is not practical.

The present invention has been made in view of the above circumstances, and its purpose is to use a single type of timer so that the timer set time limit always matches the actual washing operation time, regardless of whether the power frequency is 50Hz or 60H2. There is a washing machine provided.

[Configuration of the Invention (Means for Solving the Problems) The present invention provides a frequency determining means for determining the power frequency in a washing operation which is time-limited controlled by a timer equipped with a timer motor consisting of a synchronous motor. and,
When this frequency determining means determines that 50 Hz is the power supply frequency, the timer motor is continuously energized.
The present invention is characterized in that it is provided with a timer motor control means that energizes the timer motor in a energization/disconnection pattern in which the ratio of energization time to power-off time is [1:0.2] when 0 Hz is determined.

(Function) According to the above means, when the power supply frequency is 50 Hz, the timer motor is continuously energized. Therefore, the timer motor rotates at a speed synchronized with its power supply frequency of 50 Hz. Then, a time limit is counted according to this speed. Also,
When the power supply frequency is 60 Hz, the timer motor is energized in a energization/disconnection pattern in which the ratio of energization time to power-off time is [1:0.2]. In this case, the rotation speed of the timer motor is 1.2 times faster than in the case of 50 Hz, but the duty ratio (0, 2/
(1+0.2)) There is a power outage period in the timer motor, so in the end, the power frequency is 50Hz and 6
The time limit is counted at the same speed as in the case of 0 Hz. Therefore, if the power frequency is 50Hz or 60Hz
In either case, only one type of timer is required, and
The timer set time limit and the actual washing operation time always match, and therefore only one type of scale display section is required for setting the timer knob.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 shows an electrical configuration, in which a timer 11 is connected to a timer motor 12 consisting of a synchronous motor.
In addition, a timer knob 13 and a scale display section 14 are provided.
(See Figure 3 for both) and cam switch 15.1
6. The cam switch 15 is a main contact point in which a cam area, which is a time limit element, is set according to the amount of operation displacement (rotation angle) by the timer knob 13, and the washing operation is started according to the time limit set by the cam switch 15. The time limit is controlled. In addition, the cam switch 16
is for forward/reverse switching of the washing machine motor 20, which will be described later, and is configured to sequentially switch between the contacts (Ca), the neutral position, and between the contacts (c-b) at a predetermined period.

Therefore, between one power line 17a and the other power line 17b of the commercial power source 17, a triac 19, a cam switch 15, and a timer motor 1, which constitute a part of a timer motor control circuit 18 serving as a timer motor control means, are connected.
2 are connected in sequence, and a series circuit of the cam switch 16 and the washing machine motor 20 is connected in parallel to the timer motor 12.

Further, a frequency discrimination circuit 21 as a frequency discrimination means is connected between the power lines 17g and 17b,
The frequency discrimination circuit 21 is configured to detect the zero-crossing phase of the power supply 17 and compare and determine the cycle of the zero-crossing phase with a reference value to discriminate the frequency as either 50 Hz or 60 Hz.

The timer motor control circuit 18 is configured to include a control circuit 22 and a gate trigger circuit 23 in addition to the triac 19, and when the discrimination result given from the frequency discrimination circuit 21 is 50Hz, the control circuit 22 A phase control signal for 50 Hz is output, and when the determination result is 60 Hz, a phase control signal for 60 Hz is output and applied to the gate trigger circuit 23. The gate trigger circuit 23 controls the triac 19 to turn on and off as shown in FIGS. 2(a) and 2(b) according to the 50 Hz phase control signal and the 60 Hz phase control signal supplied from the control circuit 22. That is, when a 50Hz phase control signal is applied, it is turned on continuously as shown in FIG.
When the phase control signal for 0 Hz is given, the control is performed so that it is repeatedly turned on for 1 second and off for 0.2 seconds, as shown in FIG. In other words, at 50 Hz, the triac 19
When is turned on for a unit time, for example, 1.2 seconds, in the case of 60 Hz, the triac 19 is turned on for 1 second and turned off for 0.2 seconds.

In the case of FIG. 2(a), the timer motor 12 and the washing machine motor 20 are continuously energized as shown in FIG. 2(C). In the case of FIG. 2(b), as shown in FIG. 2(d), the timer motor 12 and the washing machine motor 20 are intermittently energized. In this case, the timer motor 12 has a ratio of energization time to power-off time of [1].
: Power is applied in a power-off pattern of 0°2.

The operation of the above configuration will be described. First, a case where this washing machine is used at a power frequency of 50 Hz will be described.

In this case, the frequency discrimination circuit 21 determines that the power supply frequency is 50
Hz is determined, and as a result, the timer motor control circuit 1
At 8, the triac 19 is turned on continuously.

Then, for example, the timer knob 13 is rotated to set the timer knob 13 to rl OJ (equivalent to 10 minutes) on the scale display section 14 shown in FIG. Then, the cam switch 15 is relatively moved to a predetermined cam area and turned on. In this case, since the triac 19 is continuously on (second
(see figure (a)), the timer motor 12 and the washing machine motor 16 are continuously energized at a power frequency of 50 Hz (
(See figure (c)).

The timer motor 12 rotates at a speed corresponding to the power supply frequency of 50 Hz, and therefore, the cam area for the cam switch 15 approaches the switch-off point according to the speed. In other words, the time is counted. Then, when 10 minutes have passed, the cam area for the cam switch 15 reaches the switch-off point, the cam switch 15 is turned off, and the timer motor 12 and the washing machine motor 20 are cut off.

Next, a case where this washing machine is used at a power frequency of 60 Hz will be described. In this case, the frequency discrimination circuit 21 discriminates the power supply frequency of 60 Hz, and as a result, the triac 19 in the timer motor control circuit 18 turns on (1 second) and off (0 seconds) in the pattern shown in FIG. 3(b).
, 2 seconds).

Then, in the same manner as described above, the timer knob 13 is rotated and set to rlOJ (corresponding to 10 minutes) on the scale display section 14 shown in FIG. Then, cam switch 15
relatively moves to a predetermined cam area and turns on. In this case, the triac 19 turns on intermittently (see Figure 2 (
b)), timer motor 12 and washing machine motor 1
6 is intermittently energized at a power supply frequency of 60 Hz (see (d) in the figure).

The timer motor 12 rotates at a speed corresponding to the power supply frequency of 60 Hz, and therefore, the cam area for the cam switch 15 approaches the switch-off point according to the speed. In other words, the time is counted. Its speed is 50 as mentioned above.
This is 1.2 times that in the case of Hz. In this case, the ratio of the energization time to the power-off time for the timer motor 12 is 1:0.2.
Therefore, the duty ratio (0,2/(1
Since there is a power outage period in the timer motor 12 at a time ratio of +0.2)), in the end, the power frequency is 50Hz and 6
At the same speed as in the case of 0 Hz, the cam area for the cam switch 15 approaches the switch-off point according to the speed. Therefore, after 10 minutes have elapsed, the cam area for the cam switch 15 reaches the switch-off point, the cam switch 15 is turned off, and the timer motor 12 and the washing machine motor 20 are de-energized.

As described above, according to this embodiment, when the power frequency is 50 Hz, the timer motor 12 is continuously energized, and when the power frequency is 60 Hz, the timer motor 12 is continuously energized.
Since the configuration is such that the current is applied in a power-on/off pattern where the ratio of the power-on time to the power-off time is [1:0.2], the power supply frequency is 6.
In the case of 0Hz, the rotation speed of the timer motor 12 is 50
It is 1.2 times faster than the Hz case, but the 1.2
Duty ratio (0,2/(1+0.2)) to double the speed
Since there is a power outage period in the timer motor 12 at a time ratio of , the time is counted at the same speed when the power frequency is 50 Hz and when the power frequency is 60 Hz. Therefore, regardless of whether the power frequency is 50Hz or 60Hz, only one type of timer is required, and the timer set time limit always matches the actual washing operation time.
Only one type of scale display section 14 is required for setting the timer knob 13.

[Effects of the Invention] As is clear from the above description, the present invention provides a frequency discriminating means for discriminating the power frequency in a timer that controls the washing operation by a timer equipped with a timer motor consisting of a synchronous motor. When the frequency determining means determines that the power frequency is 50 Hz, the timer motor is continuously energized, and when 60 Hz is determined, the timer motor is energized so that the ratio of the energization time to the power-off time is [1:0.2]. The present invention is characterized in that it is provided with a timer motor control means that energizes in a energization/disconnection pattern, and thus, regardless of whether the power frequency is 50 Hz or 60 Hz, only one type of timer is required, and the timer motor control means is also provided. The setting time and the actual washing operation time always match, and therefore only one type of scale display is required for setting the timer knob, which has the effect of simplifying the configuration and reducing costs overall. play.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a diagram showing the electrical configuration, FIG. 2 is a diagram showing the operating state of each part for explaining the function, and FIG. 3 is a front view of the timer knob and scale display section. FIG. 4 is a diagram corresponding to FIG. 3 showing a conventional example. In the drawing, 11 is a timer, 12 is a timer motor, and 13 is a timer.
18 is a timer motor control circuit (timer motor control means), and 21 is a frequency discrimination circuit (frequency discrimination means). Figure 1 Figure 2 Figure 3 Figure

Claims (1)

[Claims] 1. In a timer equipped with a timer motor consisting of a synchronous motor, in which the washing operation is time-limited controlled, there is a frequency discrimination means for discriminating the power frequency, and when the frequency discrimination means discriminates 50 Hz as the power frequency. Continuously energize the timer motor at 60Hz
and a timer motor control means for energizing the timer motor in a energization/disconnection pattern in which the ratio of the energization time to the de-energization time is [1:0.2] when it is determined. .