JP3172326B2 - Washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a power supply frequency of 50 Hz.
And a washing machine capable of sharing 60 Hz.

[0002]

2. Description of the Related Art A method of using a washing machine in either a 50 Hz or 60 Hz region is as follows. (1) An inverter whose rotation speed can be freely changed by a control board built in the washing machine regardless of a power supply frequency. 50Hz, 60Hz with motor
There are known a method of setting the same rotation speed, and (2) a phase control method of cutting a part of a power supply waveform when the power supply frequency is 60 Hz to reduce the motor torque to reduce the rotation speed. I have.

[0003]

In the above prior art, (1) has the disadvantage that the control board for performing the inverter control is complicated, the price is high, and there is no space for storing the control board.

In (2), since a part of the power supply waveform is cut at 60 Hz, the waveform supplied to the motor does not become a continuous sinusoidal waveform, so that the rotation of the motor becomes discontinuous and the motor rotation noise increases. .

[0005] Also, when the power supply frequency is 50 Hz or 60 Hz,
When the motor pulley is operated using 50 Hz, 60
At 1 Hz, the number of rotations of the motor is 1.2 times that at 50 Hz.

(2) The number of revolutions of the stirring blade during “washing” is also 1.
As a result, the washing water flow becomes stronger, and problems such as damage to the laundry and wet floor due to splashing of water occur.

When the motor is driven by using a motor pulley of 60 Hz, the rotation speed of the motor is 60 Hz at 50 Hz.
(1) At the time of spin-drying, the spinning speed of the spin-drying tub is as low as 80%, and the spin-drying performance deteriorates. (2) The number of revolutions of the stirring blade at the time of "washing" is reduced to 80%, so that the washing water flow is weakened, and the washing power of the laundry is weakened.

[0008]

In order to solve the above prior art, an outer frame, an outer tub provided inside the outer frame, a washing and dewatering tub suspended and supported in the outer tub, A stirring blade rotatably installed in the washing and dewatering tub, a driving unit for driving the washing and dewatering tub and the stirring blade to rotate, and a power frequency determining unit for determining a power frequency of the driving unit. has, in a washing machine which can be the power supply frequency is use co the 50Hz and 60Hz, is the power supply frequency as washing Engineering and equal to 50Hz and 60Hz both as washing engineering time, the reversal agitation timed of the stirring blades each different causes, electricity
When the power supply frequency is 50 Hz, the dehydration process time is 50 Hz.
In addition to making it longer at 60 Hz,
The panel display to be strong, normal, weak, etc.
It is characterized by displaying information in text .

[0009]

[Action] wash have the time to 50Hz, and 60Hz same time,
A dedicated time limit is set for each of the stirring reversal time periods of 50 Hz and 60 Hz, and the dedicated time period is selected according to the power supply frequency .
In the "washing" step, the same detergency as before can be secured at both the power frequency of 50 Hz and 60 Hz, and splashing of water during washing can be prevented. In addition, at the time of the dehydration process with a power supply frequency of 50 Hz
So that the interval is longer than when the power supply frequency is 60 Hz.
And strong and weak information such as "strong", "standard" and "weak"
The “dehydration” process, which is displayed on the panel of the text of the
Dehydration of the same degree is realized regardless of the number, and the strength of the dehydration
Information can be conveyed simply.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a washing machine adopting the present invention has a hanging rod 2 and anti-vibration devices 3 and 4 in an outer frame 1 made of a steel plate.
The outer tub 4 is suspended by a book.

A washing and dewatering tub 5 is rotatably provided in the outer tub 4 for storing water during washing. A large number of dewatering holes 5a are provided in the washing and dewatering tub. A pulsator 6 for washing and stirring is disposed at the center of the washing and dewatering tub.

A driving motor 7, a motor pulley 7a attached to the driving motor, a dehydrating / washing switching clutch 8, a P pulley 8a, and a motor pulley 7a and a P pulley 8a are connected to the bottom of the outer tub 4 to rotate the motor. Transmission belt 7
b, a drain valve motor 9 for clutch operation and opening / closing of a drain valve is installed, and an electrode portion of a high-frequency conductivity sensor 10 (hereinafter referred to as a conductivity sensor) for measuring the conductivity of the washing liquid is provided on the bottom side wall of the bottom of the outer tub 4. It is installed so that it penetrates and is immersed in water.

An operation panel 13 is provided at a rear portion of the top cover 12, and a water supply electromagnetic valve 14 for supplying water from a tap water tap into the tank is provided in the operation panel 13.

The outlet of the water supply solenoid valve 14 has a water supply port 15a in the tub for directly supplying water to the washing and dewatering tub 5 and a sensor water supply port for supplying water between the outer tub 4 provided in the tub cover 16 and the washing and dewatering tub. 15b. (The water supply solenoid valve 14 and the sensor water supply port 15b are connected by a flexible hose.) The conductive sensor 10 is located substantially directly below the sensor water supply port 15b. The outer tank 4 is further provided in the operation panel 13.
A water level sensor (not shown) for detecting the water level of the washing machine and a control board 17 for controlling the washing machine.

A control board is connected via a power switch 18 (not shown) to a microcomputer for controlling the power supply, a power supply circuit, an LE.
It comprises a D display circuit, an external operation switch circuit, a solenoid output circuit, an output circuit, a high-frequency oscillation circuit for controlling the conduction sensor 10, a sensor reading circuit, a nonvolatile memory element, and the like.

The state of the conductivity sensor 10 between the electrodes 10b of the conductivity sensor 10 (only water,
A change in the impedance that changes in accordance with the concentration of the detergent, the amount of dirt, etc.) is captured by the sensor reading circuit as a change in the primary voltage of the insulating transformer 17a, input to the microcomputer, and compared with data stored in advance to calculate the outer tank 4. Detects the type and state of the washing liquid inside and the type of clothing.

Next, the operation and control method of the washing machine will be described.
When the power plug is plugged into the outlet, detergent and laundry are turned on, and the power switch is turned on, the control board measures the pitch of the power waveform and determines the pitch according to the waveform pitch length.
0Hz and 60Hz are judged, and the result is
It is stored in M and the subsequent control is performed.

Then, as shown in FIG. 4, the LED of the "standard" course of the LED display is turned on and set. When the course button is pressed, the LED of each course is turned on, and each course can be set.

Now, when the "standard course" is set, the LED display of each process is "wash" for 12 minutes, "rinse" is standard, and "dehydration" is also standard, and the "start" button is pressed. First, the water supply electromagnetic valve 14 is opened to start water supply.

Next, when the water supply reaches the specified cloth amount sensing water level, the water supply is temporarily stopped, the amount and quality of the clothes are detected, and the cloth amount sensing step of stirring for about 30 seconds to determine the set water level. (Stirring time is 50H
z, 60 Hz).

At this time, if it is determined that the water level is "medium" as a result of the laundry amount sensing, water is supplied to the "medium" water level. "During"
When the water is supplied to the water level, the cloth is sensed by stirring with the pulsator 6 for about 10 seconds (the stirring time is also 50 Hz, 60 Hz).
The frequency and the number of times of “washing,” “rinsing,” and “dehydration” are automatically set by fuzzy control based on the results of the cloth amount and the cloth quality sensing.

At this time, the time of “washing”, “rinsing” and “dehydration” when standard clothing is put in is 50 Hz, 60 H
As shown in FIG. 3 at z, a fixed time is set in the microcomputer regardless of the power supply frequency, and the operation is performed during this time. At this time, the stirring water flow is 5
The inversion time of 0 Hz and 60 Hz is set in the microcomputer, and the water flow is selected and operated according to the determination of the power supply frequency. Therefore, when the power supply frequency is 50 Hz and 6
At 0 Hz, the same detergency as before can be secured, and splashing of water during washing can be prevented.

The process time of the "rinsing" agitation is constant irrespective of the frequency, and the agitating water flow is changed by the frequency as in the "washing".

In the "dehydration" step, as shown in FIG. 2, the dehydration time is set such that the dehydration time at 50 Hz becomes the same as the dehydration rate at 60 Hz, and a dedicated time is selected according to the power supply frequency. Thus, a required dehydration rate can be obtained while securing the strength of the dehydration mechanism. (At this time, it is conceivable that the dehydration time at 60 Hz is the same as the time at 50 Hz. However, rotating 60 Hz having a high rotation speed for a long period of time as well as 50 Hz is necessary for the dehydration life and the dehydration mechanism. However, it is disadvantageous because of the strength of (1), and it is necessary to keep the spinning speed low. This is not preferable.) In addition, the intermittent spinning time for preventing draining noise and foaming at the start of spinning is also operated at 50 Hz and 60 Hz, respectively.

[0026]

According to the present invention , the washing time is 50 Hz,
60 Hz is the same time, and the stirring reversal time is 50 Hz, 60
Hz Each time is set to a dedicated time, and the dedicated time is set according to the power supply frequency.
The “washing” process, in which the
Detergency equivalent to conventional at both source frequency of 50Hz and 60Hz
Can prevent water splashing during washing
You. Further, the dehydration step time when the power supply frequency is 50 Hz is
Make it longer than when the power supply frequency is 60Hz.
Text of strong and weak information such as "kamo", "strong", "standard", "weak"
The "dehydration" process shown on the panel is related to the power supply frequency.
And achieve the same level of dehydration, and provide information on the strength of the dehydration.
Can be concisely conveyed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a washing machine equipped with one embodiment.

FIG. 2 is a characteristic diagram showing a relationship between a dehydration time and a dehydration rate.

FIG. 3 is an explanatory view of an example at a time of 50 Hz and 60 Hz in each step.

FIG. 4 is a front view of a washing machine panel display unit equipped with one embodiment.

[Explanation of symbols]

4 ... Outer tub, 5 ... Dehydration tub, 6 ... Pulsator, 7 ... Drive motor.

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroyuki Toshimitsu 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Within the Living Equipment Division, Hitachi, Ltd. No. 1 Hitachi, Ltd. Living Equipment Division (56) References JP-A-60-139286 (JP, A) JP-A-2-277499 (JP, A) JP-A-3-285596 (JP, A) JP-A-3-242197 (JP, A) JP-A-4-327887 (JP, A) JP-A-6-254288 (JP, A) JP-A-62-298394 (JP, A) JP-A-60-1985 139288 (JP, A) JP-A-6-39179 (JP, A) Jikken Sho 63-10153 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 33/02

Claims (2)

(57) [Claims] 1. An outer frame, an outer tank provided in the outer frame,
A washing and dewatering tub suspended and supported in the outer tub, a stirring blade rotatably installed in the washing and dewatering tub, and a driving means for rotating and driving the washing and dewatering tub and the stirring wing; a power supply frequency determining means for determining the power supply frequency of said driving means in a washing machine which is capable of the power supply frequency is <br/> for co the 50Hz and 60 Hz, is the power supply frequency as washing Engineering 50Hz and 60Hz and equal to about washing engineering time together, the varied stirring blade reversing stirring timed respectively, during the dehydration step of the power supply frequency 50Hz
If the interval is longer than when the power supply frequency is 60 Hz,
In the dehydration step, the panel display was changed to "strong" and "mark".
A washing machine characterized by displaying sentences of strength information such as "quasi" and "weak" . 2. A method according to claim 1, wherein the power supply frequency as to too engineering is the same as much as time Engineering rinsing both 50Hz and 60 Hz, washing machine characterized by varying the inversion stirring timed said stirring blade, respectively.